Does teleportation through a stable traversable wormhole break any known laws of physics?

Is it merely the lack of our knowledge why stable traversable wormholes have not yet been invented to allow for instant travel between remote locations? Are we just not that advanced yet? Or does such a thing break some known laws of physics and therefore cannot be built in principle?  Let me write a bit of sci-fi here just to clearly outline what thing this question is about. This wormhole, as a mass product taking any and all means of conventional transport out of business, is manufactured looking literally like a pair of window frames (or doors, gates etc.) tied to each other by their face sides. Upon unpacking this product, the two gates (Gate 1 and 2) can be just taken apart and placed at any distance from each other. Whatever enters Gate 1 through its side A will not emerge out of its side B. Instead, it will emerge out of side A of Gate 2, wherever that is now. Similarly, entering side B of Gate 1 will just let the object out of side B of Gate 2.  Gate 1 will be installed at say "London International Teleport", Gate 2 will be transported (initially by conventional transport)ⁱ to wherever it needs to be at, say "New York International Teleport". Wealthy individuals will be able to install such gates at their homes so that getting from a mansion in Miami to another one in New Zealand will be just a matter of opening a door and walking through it like it was in the same building.  For simplicity let's assume that both gates are installed at the same altitude so that stepping through them does not involve any work against the gravity of Earth.  Physically, such a gate could work by say keeping two points in our 3D space tied to each other in some other, 4th dimension (like as if we lived in 2D world, on a piece of paper, making such a wormwhole would be just a matter of bending the paper and affixing two points on it to each other). But this question does not limit the physical implementation to any particular solution.   ⁱ It is also interesting if transporting such a gate through another gate would not be outlawed by physics.  Closely related, but not the same:


How do I access the list of currently logged on users through Terminal Services Manager in Windows Server 2012?

In Windows 2003 and 2008 we had Terminal Services Manager (see screenshot below). However in Windows server 2012 it's .   Does anyone know how to access the list of currently remotely logged on users in Windows 2012 through a similar tool or some other way?    (I tried connecting to Windows 2012 from Windows 2008, that's why you see "win2012" in the TSM groups list. But that didn't quite work, and that's not a solution to my problem either. I was just trying to somehow manage remote users on the Win 2012 server.)


Why doesn't the word 'confirm' have "3rd person -s" in this text?

The issue is in the headline 'Liverpool confirm Luis Suárez’s £75m move to Barcelona pending medical'.  Nevertheless It says "A Liverpool statement said: “Liverpool FC confirms that Luis Suárez will ..." in the third paragraph  I don't catch the difference. Can someone explain it to me?   Lot of thanks.


Looking for the title and author of a short story - thin strip of heat around the oceans

I'm looking for a story that I remember reading approximately 10-15 years ago, but the story itself is older maybe from the 60's/70's. The story was written in English and was in a paperback, possibly an anthology, but I don't remember any of the other stories if it was.  The details for this one story are a little vague but what I remember is as follows:  A spaceship is orbiting a planet and notes that there is nothing showing on any scanners except for a thin line of heat being around the oceans.  As this seems to be the only evidence of activity on the planet and is unusual, one (or more) of the crew land inland of the "heat" line and set out to find out what it is.  As the crew get closer to the source of the heat signature they begin to see skeletons and then dead bodies.  I think the ending has the crew crest the top of a hill and they see that the source of the heat signature..... all the humans/humanoids that make up the population are crowded around the shores and have evolved to be taller to try and reach the ocean.  They fight and kill each other to reach the water I think  I remember the sense of quiet desperation of the story and would like to read it again, can anyone in the community help me with an answer to this question?


Covariance of a random vector after a linear transformation

If $\mathbf {Z}$ is random vector and $A$ is a fixed matrix, could someone explain why $$\mathrm{cov}[A \mathbf {Z}]= A \mathrm{cov}[\mathbf {Z}]A^\top.$$


How to give an entity a tag, and take it away after a given time period?

How do I use command blocks to make it so after an entity has had a tag for 1 minute/any given time, it will be taken away?


I'm giving Deus Ex a quick playthrough as a refresher before jumping into Human Revolution. In the interest of expediency, I've decided to cheat. ^.^  Normally, cheats must be re-enabled for each level when playing the original DX. I've encountered instructions on several sites (word-for-word identical instructions, so clearly copy/pasted) for permanently enabling cheats, but they aren't working for me:     Because you will need to redo this for every level, you can open up 'user.ini' and add 'bCheatsEnabled True' in the [DeusEx.DeusExGameInfo] section of the file to allow cheats to be activated forever.   Not only is that not working for me, it doesn't even look right compared to the rest of the file (space instead of =). With increasing desperation, I've tried adding that line (both verbatim and switching to an equal sign) to every section of both User.ini and DeusEx.ini which looks even remotely plausible — even creating a [DeusEx.JCDentonMale] section, just in case.  Does anyone know how to get this working? I'm running DX:GOTY version 1.112fm from Steam on Windows 7.


Choose which sites to show in the "feed"

I have a StackExchange account which I mostly use for Stack Overflow (and meta), but I did have some activity on other sites (a comment or two) a long time ago.  I think it's distracting that I still see it on the feed (for example that I'm close to a privilege that I'm not going to reach) and I have no control over it.  I went ahead and removed those sites from the "Your sites" part of the panel on the right, but I still see "hot questions" from them on the main feed.


If $GCD(a,b)=1$, then $GCD((a+b)^m , (a-b)^m )$ is at most $2^m$?

I'm stuck for a few days in the following problem:   If $GCD(a,b)=1$, then $GCD((a+b)^m , (a-b)^m )$ is at most $2^m$.   Can you give me a hint?


An 80s sci fi movie about a guy being interrogated in a torture chamber

I remember this one is very dimly. I was recording it on Betamax, it was that long ago. We kept Betamax very late, though, so this was on TV in probably the mid to late 80s. I wouldn't swear it wasn't very early 90s, but probably not. I only watched the first five minutes; I would have been a small kid and wasn't allowed to watch the rest. I've wanted to track it down ever since.  It was live-action, sci-fi, American. The opening scene, or a scene very near the beginning, involved a gloomy, generically sci-fi torture chamber with a guy strapped to a table in the middle, and a genial torturer demanding information and calling for various tortures to be applied. One of them was called "ultra[something] slime." The guy on the table is screaming "no, no," and refusing to answer. It was a fairly standard torture scene.  I remember it looking reasonably well produced, film-originated, gloomy, shadowy, grey in tone, no bright colours. Lancing beams of light. Probably an 80s movie. I felt like it was shaping up to be post-apocalyptic, but I'm not sure. My recollections could be very inaccurate as this is thirty years ago and I was probably eight, so this is a very long shot, but any ideas gratefully received.  I've never seen it since this one UK broadcast at that time, so I'm fairly sure it isn't any of the well-known 80s sci-fi. It isn't Millennium, but it looked a bit like it, production-design-wise.


How to remove the "3D Objects" entry from Windows 10 Explorer?

The 2017 Fall Creators Update to Windows 10 added a "3D Objects" folder to the "This PC" view of Windows Explorer:    How can this be removed?


Some time ago I saw this beautiful problem and think it is worth to post it:  Let $S$ be the area of triangle that covers a square of side $1$. Prove that $S \ge 2$.


Is there a way to get just my privilege to (in)validate flags in chat revoked?

Because I have 40.3K rep across all Stack Exchange sites, I get that blue orb above my avatar whenever someone flags something in chat, with the options to validate or invalidate a chat flag.  I don't want that pressure. I don't have the social capabilities to judge whether a flag is valid or not, especially in those cases where there is no clear violation of chat rules. Something like curses or offensive language I can just about judge that it's a valid flag. But more often than not, I simply cannot personally judge whether the flag is valid or invalid, and I feel like it's a waste of a potential flag judging to let me judge them. Especially considering the "Not sure" option actually is closer to "a little bit invalid" than it is to "don't ask me".  On top of that, there is the issue of emotional instability. Due to the inherent nature of a feature used to moderate offensive messages, nearly every message which appears in a blue orb is offensive content. People who use offensive language, or who voice racist or sexist opinions, or showcase political extremism.  I don't want to see stuff like that. The world right now is going through some rough patches, with terrorism, political extremism and highly flammable rhetoric from many sides. I'm already emotionally much more susceptible to bad news, and my happy/sad scale rarely measures above the neutral level. I'm not depressed, mind you, but I'm not happy either. I use the Bridge, the chat room I am a regular of, as a sort-of refuge from the worst of what's happening out there.   Having those offensive messages from the flags appear on my screen on a regular level confronts me with the negative sides of the world, and it moves my scale closer to the sad level. I fear that too much of that negative stuff will make me sad, and eventually depressed. I obviously don't want that.  Is there a way that I can say "stop giving me flag requests, because I can't handle them, both in the "I don't know what to do with them" and the "they're too much for me to handle mentally" senses"?


Two search bars on the same page or combination?

The main use of my site is video browsing. There is a search bar in the nav to search for videos. My site also has a photo section.  I need to add search functionality on the photo section. I'm torn between:   Having 2 search bars. The one in the nav for videos and one towards the top when browsing the photo sections. When browsing the photo section, the nav search bar only searches photos. (Don't think this is a good idea..) A multiple select search.. So a dropdown next to the search bar that lets users toggle between video and photo search. When browsing photos the default selected is photos.


USB 3.0 ports function as USB 2.0 ports on Windows 7 -- trying to fix via DeviceMgr & downloads from Intel website

My question is actually a follow-up to the question-and-answer poisted by a fellow at this superuser URL,   The specs for my computer are:  HP Pavilion dv7-6b32us Laptop Core i7 2670QM 2.20GHz, 4GB DDR3, 640GB HDD ,Win 7 Prem.  As I understand it, in order to verify that my computer's designated 'USB 3.0' ports will actually interface with 'USB 3.0 flash-drives' at USB 3.0 speeds, it is necessary for iusb3hcs to appear when I select Device lower filters in the details of the "PCI bus" device, via Device Manager.  As this screenshot indicates, that does not seem to be the case for me:    To that end, as suggested at the previous Superuser question-and-answer, I tried going to the . (click to see)  There are 4 downloads being offered by the website, but how do I determine which of these 4 offered downloads is the appropriate one for me to download?    Many thanks for any help that can be offered.


Is the practice of doing normality test before doing t test wrong?

When I read research papers, I saw that many people do a normality test first, then decide if a t-test or a non-parametric test should be applied.  I have a concern about such practice. Let’s say the sample follows a gamma distribution, which is kind of bell shaped, but different from normal. The larger the sample size, the more power the normality test has. So a big sample size can lead to the rejection of normality. On the other hand, the larger the sample size, the better fit with central limit theorem. As a result, even though the sample is not normal, its mean can be approximated by normal.   So we have a paradox: on one hand, large sample means its mean can be approximated by normal, which means t-test can be applied.   on the other hand, large sample give normality test more power, which in turn rejects the use of t test.   Is my concern valid? Why people do normality test? Is there an alternative way?


regex match pattern in a string multiple times

I have the following string "*&abc=123&**&defg=hh&*" and so on the pattern start and end is && and I would like to have the following when I do regex.matches or regex.split  first match  = &abc=123& 2 match = &defg=hh&  appreciate any help


Short Story - Next stage of human evolution has a language they all understand. Protagonist is father who can only read it

I read this somewhere in the early 1990s in a science fiction anthology, I think. The protagonist is a man with a young son. He learns that some of the books that his son has are written in language that he and his son can understand, but most people cannot. He eventually meets the people behind the books and it's explained that the books are written in a way such that only mutants can comprehend it, but that they all also had further talents. He's tested, and it's revealed that his only talent is being able to read the script. Near the end of the story, all of the mutants are going somewhere else (another planet?) and he's told that he cannot join them, but that they would provide a replacement for his son. It ends with him and his wife meeting the simulacrum and finding it indistinguishable from the real thing.  The only other details I recall about it were that the place where the books came from could only be seen by mutants as per the language bit.


What 3rd party app do I need to install to make Ctrl+Shift switch input language?

I can not make Ctrl+Shift switch input language. What do I do? The app that adjust hot keys don't react when I press Ctrl+Shift. Please help!


What is that define a motherboard RAM maximum?

I need to replace the motherboard of my laptop. I found one that should be perfect but it only support 1GB RAM while my old one support up to 8GB.  I was wondering, is there a chance I can upgrade the RAM limits replacing some parts from the old motherboard to the new one? Do you which parts are actually the ones who define this limits?


What's the difference between 'int?' and 'int' in C#?

I am 90% sure I saw this answer on stackoverflow before, in fact I had never seen the "int?" syntax before seeing it here, but no matter how I search I can't find the previous post, and it's driving me crazy.  It's possible that I've been eating the funny mushrooms by accident, but if I'm not, can someone please point out the previous post if they can find it or re-explain it?  My stackoverflow search-fu is apparently too low....


Maximum and minimum of of $f(x)=|x-1|+|x-2|+|x-3|$

I am trying to find the maximums or minimums of $$f(x)=|x-1|+|x-2|+|x-3|$$ (if there exist).  My attempt: First I compute the derivative and tried to find critical point, i.e, $f'(x) = \frac{x-1}{|x-1|} + \frac{x-2}{|x-2|} + \frac{x-3}{|x-3|}=0$, first I noted that this derivative doesn't exist in 1,2,3 for the absolute value. And the are no critic point (Is that correct?)  Then I stuck here because I don't know if there is a maximum, I think that it is not exist but how can I justified and I believe that there is a global minimum, but this occurs only if I found a critical point, some help pls.


Advertisment in Chrome and Firefox for google-search - Malware?

Since roughly one month I see an insane increase of google's advertisments at web-search. Nearly the whole monitore is full of ads, I have to scoll down to see some search-results (see the ). Before, the search results appeared, and on the right, in some yellow box, there were the ads - perfectly separated. Now google tries to trick me.  The ads appear roughly 0.5sec after the normal search results, so when I already wanted to click at the first result, I am accidentally clicking at the first advertisment link.  This is driving me crazy, I can't believe that is on purpose, so I wonder whether this could be some sort of adware that installed itself to firefox, or how I can deactivate it?  Since one month now I hate google and start hate the internet, so please help me :-)  I'm using Firefox and Chrome on Windows8. I've installed Adblock Plus, but it doesn't help.  Edit  It happens on Firefox and chrome, and I just realized that all those "google"-links actually link to "www.flwsrf.com" , for example .  As suggested in the comment by Rounin, I installed CCleaner, Ad-Aware and SpyBot, but they dont find anything.  Solution  As mentioned in the link by ChrisInEdmonton's comment, the problem was a Adware called FlowSurf, which inserts Ads into IE, Chrome, FF. Fortunatly, it is very easy to remove this malware: Control Panel -> Uninstall program -> "Flowsurf". Then restarting the browser and everything works perfectly again :)


Is every sub-lattice of $\mathcal P(X)$ isomorphic to a sub-lattice of $\mathcal P(X')$ containing singleton sets?

Let $X$ be a finite set. $\mathcal{P}(X)$ denotes the set of all subsets of $X$.  Let $\Gamma$ be a sub-lattice of $\mathcal{P}(X)$, i.e. $\Gamma$ is a collection of subsets of $X$ closed under union and intersection. Suppose $\Gamma$ non-empty and $\Gamma$ not made only of the empty set.  Set $$n:=n(\Gamma):=\min\{m\geq1\,|\, \Gamma\text{ contains at least one set of cardinality }m\}$$ and suppose $n\geq2$. I would like to find a lattice $\Gamma'$ isomorphic to $\Gamma$, but with $n(\Gamma')=1$.  With this purpose I thought to define a map $\Phi\!:\Gamma\to\Phi(\Gamma)=:\Gamma'$ doing the following operations:   from each set $A\in\Gamma$ with cardinality $|A|=n$, choose $n-1$ elements and delete them; (Notice that all these sets $A$'s are pairwise disjoint, by the minimality of $n$ and since $\Gamma$ is closed under intersection) call $Y$ the set of all deleted elements; from each set $B\in\Gamma$ with cardinality $|B|>n$, delete the elements of $Y$.   Clearly in this way one obtains $\Gamma'\subseteq\mathcal{P}(X')$, where $X':=X\smallsetminus Y$, and $n(\Gamma')=1$. My questions are:   is $\Gamma'$ a sub-lattice of $\mathcal P(X')$ ? is the map $\Phi$ an isomorphism of lattices (i.e. $\Phi$ bijection, $\Phi(A\cup B)=\Phi(A)\cup\Phi(B)\,$, $\,\Phi(A\cap B)=\Phi(A)\cap\Phi(B)\,$) ?   Edit. It is trivial that $\Phi$ is surjective (by definition of $\Gamma'$). It seems also clear that $\Phi$ is an homomorphism of lattices: it suffices to write $\Phi(A)=A\smallsetminus Y$ and apply elementary facts of set theory. Therefore the only thing that remains to prove it that $\Phi$ is injective.


3 white wires and 3 black wires. Only need 2 of each

What should I do with the extra black and white wire? The new light fixture has two lights, a black wire and a white wire for each. Should I assume just to pick any two and cover the extras with wire nuts?


I have been struggling to install Ubuntu on my laptop, I want to make a dual-boot Windows/Ubuntu, but I just can't install it. Already changed my BIOS to AHCI and UEFI, but had no effects so far. During the installation processes, I´m not even given option to install alongside Windows. After setting language and Internet connection it jumps directly to this screen.  It is also very strange because I can find it when using sudo lshw -class storage -class disk. What should be my next steps? Just to help you guys this is the data from GParted:      *-storage                   description: SATA controller    product: 7 Series Chipset Family 6-port SATA Controller [AHCI mode]    vendor: Intel Corporation    physical id: 1f.2    bus info: pci@0000:00:1f.2    version: 04    width: 32 bits    clock: 66MHz    capabilities: storage msi pm ahci_1.0 bus_master cap_list    configuration: driver=ahci latency=0    resources: irq:26 ioport:5088(size=8) ioport:5094(size=4) ioport:5080(size=8) ioport:5090(size=4) ioport:5060(size=32) memory:c3617000-c36177ff     *-scsi:0    physical id: 1    logical name: scsi0    capabilities: emulated  *-disk       description: ATA Disk       product: WDC WD7500BPKT-7       vendor: Western Digital       physical id: 0.0.0       bus info: scsi@0:0.0.0       logical name: /dev/sda       version: 1A01       serial: WD-WXA1A9147643       size: 698GiB (750GB)       capabilities: partitioned partitioned:dos       configuration: ansiversion=5 sectorsize=4096 signature=dd6865b6     *-scsi:1    physical id: 2    logical name: scsi1    capabilities: emulated  *-disk       description: ATA Disk       product: SAMSUNG SSD PM83       physical id: 0.0.0       bus info: scsi@1:0.0.0       logical name: /dev/sdb       version: 2D1Q       serial: S0XLNEAC403642       size: 29GiB (32GB)       capabilities: partitioned partitioned:dos       configuration: ansiversion=5 sectorsize=512 signature=17fdf2ea     *-scsi:2    physical id: 3    logical name: scsi2    capabilities: emulated  *-cdrom       description: DVD-RAM writer       product: DVD+-RW DS-8A8SH       vendor: PLDS       physical id: 0.0.0       bus info: scsi@2:0.0.0       logical name: /dev/cdrom       logical name: /dev/sr0       logical name: /cdrom       version: KD11       capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram       configuration: ansiversion=5 mount.fstype=iso9660 mount.options=ro,noatime state=mounted status=ready     *-medium          physical id: 0          logical name: /dev/cdrom          logical name: /cdrom          capabilities: partitioned partitioned:dos          configuration: mount.fstype=iso9660 mount.options=ro,noatime signature=6a6216fc state=mounted


As a non-native speaker of English and an engineer by training, I always get confused about hyphenation and almost always end up referring to Google every time I need to make that decision.  Does anybody know of a concise, comprehensive style guide to hyphenation that explains this rather complex issue, once and for all?


Sorting Dictionaries by Internal State of Value in Python

How can we sort a dictionary in python using the internal state of the value?  For example:  myDict = {'a': {'day': [0, 1, 2, 5], 'week': [4, 3, 1, 2, 3]},           'b': {'day': [0, 6, 2, 5], 'week': [4, 3, 1, 2, 3]}}   I want to sort the dictionary keys by the second value of the day list for their corresponding value dictionaries.


My time and date not on the menu bar and the clock is not in the system settings.   I ran sudo apt-get install indicator-datetime and received this error:  Package indicator-datetime is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source  E: Package 'indicator-datetime' has no installation candidate


Java Gregorian Calendar Returns Wrong Month

So I been at this for a few hours now and it returns the correct Year, and Day but for some odd reason it returns the wrong month. I'm sure its a simple fix but I can't seem to figure it out.  package gregoriancalendar;  import java.util.GregorianCalendar;  public class Calendar8_5 {    public static void main(String[] args){  GregorianCalendar calendar = new GregorianCalendar(); System.out.println("Current Year, Month & Date: "); System.out.println("Year is " + calendar.get(1)); System.out.println("Month is " + calendar.get(2)); System.out.println("Day is " + calendar.get(5));   calendar.setTimeInMillis(1234567898765L); //Elapse Time System.out.println("Set Value of 1234567898765L"); System.out.println("Year is " + calendar.get(1)); System.out.println("Month is " + calendar.get(2)); System.out.println("Day is " + calendar.get(5));    }   }


How do I properly connect the SSS texture in a Blender using nodes?


What is the replacement for gnome-open in GNOME?

gnome-open is typically used to open files from the CLI using their associated mime-type handler.  It doesn't appear to be installed by default anymore in 12.04. The errata has not been well documented or at least I have yet to find it.


Sequence of verbs on a sentence -- should I use commas or infinitives?

Should I put the verbs in the infinitive form in the following sentence:     As the federal auctions provide for a limited time to elaborate the   technical studies, to develop the project and to apply for the   necessary licenses   or should I omit the preposition "to" and instead write:     ... to elaborate the technical studies, develop the project, and apply   for the necessary licenses


How possible is it that the Large Hadron Collider (LHC) on its second try, could disrupt the gravity of Earth?

Is it possible that the [Large Hadron Collider],with a possible slight change in speed ( disrupt the gravity of Earth?


tl;dr: Give the score search operator ability to change between greater than and less than.  I just noticed that searching for score:0 turns up only question with a score equal to 0. Searching for score:1 gives everything with a positive score. (>=1) I can live with these. But here's the big one: score:-1. I would expect it to give all the negatively scored posts - there is a minus sign in there. But it doesn't. It gives all the posts >=-1. Greater than? So, my  is that we get more granular search options for score. For example,  score:1 would show all posts with score == 1 score:1+ would show everything score >= 1 score:0 would show all posts with score == 0 score:-1 would show everything score == -1 score:-1- would show al posts where score <= -1  In short, the operator after the number would show which direction to go with the matching. A minus sign means less than, a plus sign means greater than. No sign means exact.


post-ban for three questions with no rating

I am banned from asking questions due to having no rating on three questions, this doesn't really seem necessary.  My questions were valid, except no one up voted them, so this leads me to question ban?  If anyone can help me not do this in the future and help me out right now, please do!  Thanks!


Not all shell scripts working with crontab

I have a little VPS I run apache and a Minecraft server on. I don't ever turn it off, but should I restart it for some reason, IPTables blocks most of my ports, including port 80. I've tried so many different suggestions on fixing this, but with no luck. Also, since the provider is OVH, the support is... lacking.  So, I've created a workaround, which I'm happy with. I created a simple shell script file to open certain ports I need opened on restart (80 and 25565 for now). The important ones such as 21 and 22 are not affected on restart.   The script looks like this:  iptables -I INPUT -p tcp --dport 80 -j ACCEPT iptables -I INPUT -p udp --dport 80 -j ACCEPT iptables -I INPUT -p tcp --dport 25565 -j ACCEPT iptables -I INPUT -p udp --dport 25565 -j ACCEPT /sbin/service iptables save   When I manually run it by typing /iptdef.sh, it runs fine, the ports become open and it's all good.  Of course, it's not practical having to remember to run it every time I restart the server, so I added a crontab. The problem is, it doesn't work/run. This is my crontab file:  */5 * * * * /backup2.sh */55 * * * * /backup3.sh @reboot /iptdef.sh * * * * *  /iptdef.sh   The first two lines work. They are just simple scripts that make a backup of a folder for me. The second two lines are what's not working.   Is there a chance that perhaps it's not possible to run iptables commands from a cron? It sounds silly, but I can't see any other reason for it not to work. The scripts have the correct permissions.


I got stop for speeding in United States (New York City) and I was issued a summons stating my offence. I was than told to mail it back to the court, stating if I plead guilty or not. I did so when I was in Las Vegas and mail it through the concierge at Monte Carlo. I came back to Singapore and after almost a year, I have yet receive my summons. I was told by my friends who were caught for speeding that they received their summons after 6 months. After reading some forums, I heard that if I fail to pay the fine, and return to the US, I might get arrested at the airport. I will have to pay the fine with interest. I have the intention of returning to the States, and I'm worried.


Consistency Errors running CHECKDB on a couple of tables in SQL Server 2014

While running DBCC CHECKDB I am getting consistency errors on a couple of tables in SQL Server 2014.  I have tried REPAIR_REBUILD and rebuilding indexes on those tables but these are not helpful to repair the tables.  I have the corrupted Page IDs with me. By using this, can I get the exact corrupted rows?  Or else, how can I repair the tables without allowing data loss?  Also, I want to know, how can I find out the exact corrupted Rows.  I am running CHECKDB on a table of size 300 GB, which is in a database of size 500 GB. The error that I am getting is as follows:      We take full backups on daily basis. I have a good backup of 6th Jan 2017 . Post this date, all the backups have corrupted data. We don't have log backups.  How can I do a page only restore?  It is a SharePoint database server. As a DBA without going to support case to Microsoft, what else can I do in this situation?  The application team want to know the exact corrupted rows so that they can delete those rows.


Consider the set of matrices G = {[1, a, b; 0, 1, c; 0, 0, 1] : a, b, c belong to Q (set of rational numbers)} Given that matrix multiplication is associative, find the center of G.  Since we know that the center of a group, Z(G) = {a belong to G: ax=xa for all x belong to G} Hence Z(G) = {0, 1, a, b, c} for all a, b, c belong to Q  Is it correct?


"The one who wants" vs. "the one who want"

I am getting confused with usage of 's' with verb- consider following 2 sentences-        I am the one who wants to stay with you.   I am the one who want to stay with you.      According to me, first one is the correct usage, because, "the one who" is third person, and hence, the verb will get an 's'. Would like to know what is the rule to be followed in such cases.


Update - aggregation function in the where clause

Why this sql instruction doesn't work...?  I want to update the salaries by 15% for all employees who have salaries lower than average ...  UPDATE Employers SET salary=salary * 1.15 WHERE salary < (SELECT AVG(salary) FROM Employers);  Thanks.


My terminal reads xyz@Sam .I want to change it to some name say Ema . I tried usermod but everytime I get an error that this process is used by this process(some random four digit number ).


I am trying to develop an app to key out plants which basically involves choosing A or B from a database table which moves you on to another step in the table where you choose C or D etc.  I have written an app to create an SQLite database using Android Studio & also created one using DB Browser.  My question is where does the database written in Android Studio live and how do I access the one written in DB Handler? Please keep the answers simple,


Can't empty all my database in SQL Server

In my SQL Server I tried to truncate all tables, but there have some constraint.  So I running this  EXEC sp_msforeachtable "ALTER TABLE ? NOCHECK CONSTRAINT all" -- Disable all constraints for database EXEC sp_MSForEachTable 'TRUNCATE TABLE ?'   but still I get error as     cant truncate table ... because it is being reference by a FK constraint   Why?


In Adventurers League, does Magic Initiate let you take a spell that is not in your PHB+1? We know that "Feats and spells gained by advancement are subject to PHB+1", but in this case Magic Initiate is part of the PHB+1 and that in general is possible obtain spell out the PHB+ if out the advancement in level (see wizards)


Make grub keep its default boot under kernel updates

I dual-boot my machine and I want it to default to boot into windows so that whenever I restart the machine remotely from my home it will be able to get back into Windows (instead of Ubuntu).  The problem is that every time Ubuntu upgrades the kernel, I have to reset the default boot item of grub back to windows. This is because the grub menu loader uses positions i.e. 6 for default OS to boot. And when Ubuntu installs a new kernel it changes that order.  I am looking for a way to configure grub to remember its default boot item under kernel updates.


Why do people call their characters "toons"?

I've seen that in games like MMORPGs and the Diablo series, where the player has an "arsenal" of several characters, people refer to their characters as "toons".  What is the origin of this term?


I want to create this message exchange structure. I need that structure for school   I can only do the the above top message. I don't know how create The below part  \documentclass[tikz,border=2mm]{standalone} \usetikzlibrary{positioning,arrows.meta}  \begin{document}  \begin{tikzpicture}[block1/.style={draw, minimum width=3cm, minimum   height=1.8cm},  block2/.style={draw, minimum width=1cm, minimum height=.8cm},  >=Stealth]  \node[block1] (b1) {Include pic?};  \node[block1, right=5cm of b1] (b2) {2};   \draw[->] ([yshift=3mm]b1.east)--node[above] {hello} ([yshift=3mm]b2.west);  ;  \end{tikzpicture}  \end{document}     Thanks for your help !!!! :)


What is the difference between using a colon and a semi-colon to join two sentences?

I've seen a few questions on this site relating to semi-colons, which I believe I correctly understand, but what I'm not as clear about is colons.  For example:     The man ate the apple; it tasted good.   Is this not correctly also written as:     The man ate the apple: it tasted good.   In this case, what is the difference between the two sentences?


Installed Ubuntu in BIOS mode, can't access BIOS anymore

Just wait a minute before flagging this as off-topic. I can't believe this is not Ubuntu-related since everything happened just after my Ubuntu installation.  With this said I'll go on explaining what is happening:  I downloaded and installed the latest version of Ubuntu. I wanted a BIOS mode since I prefer this way and completed the installation process. Then I installed GNOME and rebooted. I lost access to my bios after all of this.  This is not the first time that has happened. It happened in the past and I solved switching boot partition in boot-repair using my secondary HDD but now I can't do that any more because I do not have a Windows partition on that drive.  This is my drive:  Disk /dev/sdb: 119,2 GiB, 128035676160 bytes, 250069680 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xcaa3841c  Device     Boot Start       End   Sectors   Size Id Type /dev/sdb1  *     2048 250068991 250066944 119,2G 83 Linux   When I tried boot-repair, at the end of the process it said I had to make a 500mb partition at the beginning of the partition list so that grub could work properly but hey, here's another problem:  GParted stopped working. This is the error if I try to launch it:  Created symlink /run/systemd/system/-.mount → /dev/null. Created symlink /run/systemd/system/mnt-Archive.mount → /dev/null. Created symlink /run/systemd/system/mnt-Linux\x20Games.mount → /dev/null. Created symlink /run/systemd/system/run-user-1000.mount → /dev/null. Created symlink /run/systemd/system/tmp.mount → /dev/null. /usr/sbin/gpartedbin: error while loading shared libraries: libgtkmm-2.4.so.1: cannot open shared object file: No such file or directory Removed /run/systemd/system/-.mount. Removed /run/systemd/system/mnt-Archive.mount. Removed /run/systemd/system/mnt-Linux\x20Games.mount. Removed /run/systemd/system/run-user-1000.mount. Removed /run/systemd/system/tmp.mount.   I want to mention that:   yes I'm sure I'm using the right button to enter the bios no there is no bios splash screen no, nothing happens if I spam the DEL key to enter the bios yes the key works fine yes I tried to unplug every drive yes I tried to reset CMOS yes I installed the OS in BIOS mode, I checked via terminal.   This is the output from boot-repair     This is the message alert saying that I need to make a partition to properly boot:      The boot files of [The OS now in use - Ubuntu 17.04] are far from the start of the disk. Your BIOS may not detect them. You may want to retry after creating a /boot partition (EXT4, >200MB, start of the disk). This can be performed via tools such as gParted. Then select this partition via the [Separate /boot partition:] option of [Boot Repair]. ()


Proof of Heron's Formula for the area of a triangle

Let $a,b,c$ be the lengths of the sides of a triangle. The area is given by Heron's formula: $$A = \sqrt{p(p-a)(p-b)(p-c)},$$ where $p$ is half the perimeter, or $p=\frac{a+b+c}{2}$.  Could you please provide the proof of this formula? Thank you in advance.


How to specifically send either a chat message to all players or only allies?

With the definitive edition I want to play more of this old game. One problem I've always had is how to chat only to allies or everyone. It's unclear to me where the default Enter chat goes to, it seems everyone. How can this be specified?


assembly-c from windows 10 command prompt

I'm trying learning assembly language and i need to know how to read the assembly varsion of a c program from the windows 10 command prompt. I've tried using C:\users\prete\Desktop\booksrc$ gcc -g firstprog.c but it doesn't work  please help me thank you!


How does one find out if a computer can run either a 32 or 64-bit OS, without an OS being installed on it?

See title.  I am trying to figure out if it's possible for someone to find the proper information without an OS being on the machine in question. Usually there are a number of programs you could use to find whether your computer can use either/or, and in the case of Windows it tells you if your machine is 64-bit compatible.  However, I do not have an OS installed on this machine, and from my knowledge you cannot run an executable without an OS. Do I use the BIOS? Determine it by RAM? 'How do?'  Thanks in advance, and pardon my computer illiteracy.


Find Number of elements of $S_{10}$ commuting with element (1 3 5 7 9)   I think we need to find order of centralizer of given permutation but how to find it?


Why I cannot have instance field initializers in structs in C#?

I've got the error message said "cannot have instance property or field initializers in structs" and wonder if there is any technical reason for this? Why doesn't a compiler behave like an initialization happens in a constructor?


How to select all faces with the same material?

If I have a model with 3 textures (blue, red, yellow), and I want to select all (and only) the blue faces from that model, what's the shorcut to do that? I remember there was one, but now I don't remember what button combinations were correct.


Every increasing function from a certain set to itself has at least one fixed point

I need a hint for the following question:     Let $S$ be a nonempty ordered set such that every nonempty subset $E\subseteq S$  has both a least upper bound and a greatest lower bound. Suppose $f:S \rightarrow S$ is a monotonically increasing function. Show that there exists an $x\in S$ so that $f(x)=x$.   My reasoning so far has been as follows:   I wanted to prove this by contradiction. If we assume the statement is false, this implies that for each $x\in S$, $f(x) > x$ or $f(x) < x$. Let $A:=\{x:f(x)<x\}$, $B:=\{x:f(x)>x\}$.  Let's assume $A$ is empty. Then it is easy to show a contradiction. We know that $\sup(B)\in B$. But that means that $f(\sup(B))>\sup(B)$ which is impossible. The same idea applies if we assume $B$ is empty.   What I am trying to do is prove the case where both $A$ and $B$ are nonempty. To prove the first part I haven't even used the monoticity of the function $f$, so I know that I have to use it at this point. That means trying to find a contradiction by finding $x,y\in S$, $x\le y$, $f(x)>f(y)$. I was trying to look at the supremum and infimum of $A$ and $B$ but that didn't seem to lead me anywhere.  I would appreciate hints!


Inconsistent behavior when modifying file in-place with cat, sort, tee, and pipes

Situation: When using the following command:  cat foo | sort | tee foo   where foo is a text file of multiple lines, the outcome is not consistent. The two outcomes I've observed are:   The file is sorted, and the sorted contents are printed to stdout. The file is emptied, and nothing is printed.   Question: Why does this happen?  P.S. I realize that sort has a -o option on my system.


Why does my computer show an image shot in RAW + JPEG as two JPEGs instead of one RAW and one JPEG?

I shot images in RAW + JPEG mode in Canon T3i. There are double images, but both of them are JPEGs. When I view in camera, I see the files size as 26 MB, but when I open the camera folder in computer I get both of them as JPEGs (for example, img001.jpg and img001.jpg). Am I missing something  ?  Attached is the screenshot of my explorer. How is it even possible to store the two images with the same file name in the same folder ?


i have a string of numbers, and i want to multiply these numbers  string myS = "731671765313"; int product = 1;     for(int i = 0; i<myS.length(); i++)         product *= myS[i];   How to convert the string element to int because the result is totally wrong. I tried casting it to int but in vain.


I am an Indian living in Belgium. I am travelling to Seattle via New York JFK airport from Brussels. I am travelling with Delta for both the legs. I have 4 hours(3hr 54min) of stopover time at JFK. My question is can I do my immigration at seattle international airport instead of JFK. I have heard stories of very long queues at JFK for immigration from my colleagues and I am afraid that I will miss my connecting to Seattle if I have to do my immigration at JFK. One more thing, as per my preliminary itinerary my BRU->JFK flight will arrive at terminal 4 and my JFK->SEA flight will depart from terminal 2 of JFK, how can I transfer quickly from terminal 4 to terminal 2. Thanks in advance.


Prevent a single line at the end of a page

I have a document with bold single lines before paragraphs, how do I prevent from having these line at the end of the page and the accompanying paragraph at the next page? I wish to have the bold single line together with the paragraph.


How to compute the integral $\int_{0}^{\infty} \frac{x^{1/3}}{1+x^{2}} \ dx$

I want to compute this integral $$\displaystyle\int_{0}^{\infty} \frac{x^{1/3}}{1+x^{2}} \ dx$$  What I did was the following. I substituted $x=t^{6}$, so that my $dx= 6t^{5} \ dt$ and so the integral changes to $$\int_{0}^{\infty} \frac{t^2}{1+t^{12}} \cdot 6 t^{5} \ dt =6 \cdot \int_{0}^{\infty} \frac{t^7}{1+t^{12}} \: dt$$  Now If I substitute $t^{4}=v$ then what I will be having is the following integral $$\frac{6}{4}\cdot \int_{0}^{\infty} \frac{v}{1+v^{3}} \ dv$$  Now I can write $1+v^{3} = (1+v) \cdot (1-v+v^{2})$ and so I have   \begin{align*} \int_{0}^{\infty} \frac{v}{1+v^{3}}\: dv &= \int_{0}^{\infty}\biggl[\frac{1}{3}\cdot \frac{v+1}{1-v+v^{2}} - \frac{1}{3} \cdot \frac{1}{1+v}\biggr]\: dv \end{align*}  Now the point is that the integral of $1/(1+v) \to \infty$, so I am not sure if this is the right way to do. Can anyone suggest anything?


Story featuring smart people sent on a space mission to nowhere

The story in question featured, as the vague title suggests, a "space mission" that is really a cover for forcing a bunch of really smart people to be in close proximity to each other for long enough that they can truly evolve their collective intelligence. I recall them developing new maths and, e..g, "farseeing" and eventually figuring out that while there was no planet at the end of their journey as they were told, they were able to construct one for themselves.


/home is on its own disk. Can I move that disk to a new install?

I have a whole disk mounted at /home.  I am upgrading the computer (and the OS drive, so fresh install), and I would like to retain the /home directory (disk) as it is.  How complex is this process?  Is it worth doing it this way, or should I just start fresh and restore all the user files from backup?  Nothing on the drive is encrypted.  Current and target OS are both Ubuntu Desktop 14.04 x64  Other answers I've found do not address /home being located on a separate disk.


Sharepoint 2013 rest api group subtask with respective main task?

Want to display Task and sub-task using the  rest api jquery. My query string displays task and sub-task as individual unrelated task.


I need to clear the terminal cache, I have tried with history -c but it clears the cache in that terminal session, but if I open another session and type history it shows all the previous commands.


How to have both libcurl3 and libcurl4 installed at same time?

My favorite web brower depends on libcurl3 (Opera 36.0) But many apps depends on libcurl4 including PlayOnLinux or Steam client. It will be nice to have PlayOnLinux or Steam installed but I'm not giving up my favorite web browser. Do someone knows workaround how I can have installed both of them ? I readed somewhere that libcurl4 is based on libcurl3 so I have no idea why they keep uninstalling each other.


Why does Ubuntu keep creating a 'Downloads' directory in my home directory?

I have setup my browsers so that files are automatically downloaded to a folder in my home directory called 'dls' - I just find it cleaner than 'Downloads' (and would like all my directories to start with lower-case characters.)   Why does Ubuntu insist on recreating the 'Downloads' folder, even when nothing has been added there? Perhaps alternatively, what processes are trying to access this directory, and ensuring that it exists? How can I reassign whatever special status 'Downloads' holds to my new 'dls'?    Thanks!


Explaining "-bash: No such file or directory"

Why would bash claim that a file doesn't exist when it clearly does?  $ ls -l a -r-x------ 1 configurator configurator 3904 Dec  7 10:36 a  $ file a a: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.2.5, stripped  $ ./a -bash: ./a: No such file or directory


How can I reduce expenses on currency conversions?

I would like to know the best way to reduce expenses on currency conversions.  I think I have 4 options:   Buy money in an exchange money house in my home town. Use my debit/credit cart to pay bills. Get money from an ATM. Buy money in an exchange money house in the country where I'm visiting.   What is the less expensive?


Cheap high-capacity (disk, not bandwidth) hosting options

So, the website I run is up to 8TB of photos now. I store them on a cheap dedicated server (€64/month, 3x4TB RAID 5), and back them up to Google Cloud Services. GCS is costing me about $80/month now.  The main box is going to be full within a week or two, so I need to do something.  The "easy" option, is just to buy another 8TB box. But my monthly bill will then be (64 + 64) euros + $80 = 128€ + $80 = ~£170. Once that box is full and I have to use 16TB backup at GCS it'll be £230/month.*  So, what are my options for 16TB of backed up space for less than £230/month. Anything?  If I hosted the files primarily at GCS/S3/etc, could I forego a backup? Do we consider google/amazon safe enough that my data would never be at risk? Even if that is the case... a simple mistake on my part could delete the lot. Not ideal.  I have definitely considered running the backup myself at home, but I feel it's prone to human error (me) and it'd kill my home internet at times (uploads are peaky, so I'd end up downloading 100GB a night once a week). Even if I manage to get 50Mbit/s overnight from BT (hah) that's 5 hours of bandwidth, and realistically it'd probably snare me up for 24 hours.  Thanks!  * It'd actually be more, as my main webserver is 67.50€/month on top of that figure, but that's not really relevant to this question!


So I am gradute student in theoretical computer science.   Throughout my education path up to highschool, I have all been praised a big lot by my teachers, some of them even went to such lengths as to say I was the most intelligent student they have ever taught. By dint of all that, I took it for granted that I must be cleverer than average and before I noticed, I might have gotten on a very high horse.  Then I got into college, and things started getting harder. The higher the horse, the bigger and harder the fall. So my grades stopped being close to full score, but not bad at all. Until I decided that I wanted to do a PhD later, and for that, I have to get very good marks and hope to get a scholarship.  Ever since, at the dawn of every test/exam, as opposed to the relaxed and cool mindset I'd be in before, I get very, very, VERY anxious and very flustered, either out of fear that I run out of time (because of a lived experience), or of not having the answer. That anxiousness would get lifted immeditely when time is up, and on my way back home, all answers or most of them, would start flowing in my head.  Only this morning, I had a test which I failed like never before. I quickly glossed over problems one by one in order, my mind would go blank for a few seconds, then I would deciddeto move on to the next problem and that it is no use wasting time on this one (because I wasn"'t going to find a solution), and that for every exercise. It is for a reason I say I failed today's like never before because I literally could do nothing; my mind was paralyzed and started weating and how I was going to not get to what I want to (PhD). But as soon as I got home and sat down for a few minutes, I solved prefectly 5 problems out 7  in 30 minutes (the test was to do within 90 minutes).  I was one of the most confident people in themselves before, but now I lost every bit of that confidence and wouldn't stop thinking I'm too dumb to make it. I have been struggling with this for two years now, and after today's huge blow, I decided to take to the internet and this board in order to try and find a solution. Chances are Academia is not the right board to ask this question in, but it must be the closest to that out of all other SE boards.  What can I do about my test taking so that my scores are more reflective of my natural ability?


event.preventDefault not working on AJAX loaded content

This thing is driving me nuts.  So I load some simple HTML via AJAX and once it's loaded on the DOM I do this.  $('#wrap a.link').click(function(e) {     e.preventDefault();     alert("asdasdad"); });   It simply does not prevent the link from navigating to the url in the href attribute.  My syntax seems right and I've made sure the element is in the DOM and that the function finds the a.link element.  $("#wrap a.link").each(function(key, value) {     console.log("found a link"); // this shows up in the console });   I have also tried using off() and stopImmediatePropagation() just in case some other event may be interfering, but nothing. I've also tried binding the event inside the each() loop with the same result.  What could be causing this behaviour?


Canon LBP 2900 printer for Ubuntu 13.04?

I had to recreate my computer and have installed Ubuntu 13.04 as my main OS. As a printer I would like to install a Canon iSensys LBP 2900 printer. The printer-setup recognizes the device, but it won'T allow me to install the proper driver for this device - simply because there seems to be none available. Is that true?  I checked the various similar topics about this issue, but they are either outdated and the data-packages (drivers) are not available anymore or about older/ earlier Ubuntu versions.  Thank you for any advice or help or support.  Best wishes! Liam


Moaning Myrtle was a ghost in Harry Potter. She is a minor character, but I would have to say that she is relevant to the series. Her death was quite tragic. She was bullied by Olive Hornby about her glasses and retreated to the bathroom, where she died after staring in the eyes of a basilisk. According to another ghost, Nearly Headless Nick, he says that wizards can choose to live as a ghost, but very few choose this path. Now, let's get to the point of my question: Why did Moaning Myrtle choose to become a ghost? She didn't seem happy in the girl's bathroom, so why didn't she just move on?


I've seen a few questions about copying parts from Arrays or list, but I still don't understand the logic behind it... It makes no sense for me that I can get each values by calling them by index, but it is not possible to get a part of the list by calling it by index, too...  x=[0,1,2,3,4,5] >>>x[2] 2 >>>x[4] 4 >>>x[2:4] [2,3]   What I am expecting in the last line would be that the command returns the value with index two,three and four !  >>> x[2:4] [2,3,4]   Is there a command that does it the way I thought it would be?


QGIS print a map for each polygon in KML

I'm brand new to QGIS. I imported a KML file as a layer into QGIS. I'd like to print a map for each polygon in the KML. I saw a tutorial that said to check the box "controlled by atlas", but the box is grayed out. How can I get the result they have here with the KML coming out of Google?


Does something similar to Photoshop "Smart objects" exist also in Illustrator?

The scenario is:  I´m creating a catalogue listing page for a website and i´m working with AI, is possible to replicate the single listing element in a way that allows to apply the changes i do in one, to all the listings at the same time?


php error Column count doesn't match value count at row 1?

I have checked for similar questions regarding the error however they didn't match the issue I seem to be having.  Getting the following error when attempting to insert data into database:     Column count doesn't match value count at row 1?   Here is a screenshot of the database table:   In the HTML a form, with an action of the php file, has multiple inputs with the names: name, surname, DateOfBirth, email, password, confirm-password  PHP:  <?php  // Only process the form if $_POST isn't empty if ( ! empty( $_POST ) ) {    // Connect to MySQL   $mysqli = new mysqli( 'localhost', 'root', '', 'pptpp' );    // Check our connection   if ( $mysqli->connect_error ) {     die( 'Connect Error: ' . $mysqli->connect_errno . ': ' . $mysqli->connect_error );   }    // Insert our data   $sql = "INSERT INTO user ( Forename, Surname, DateOfBirth, Email, Password ) VALUES ( '{$mysqli->real_escape_string($_POST['name, surname, DateOfBirth, email, password '])}' )";   $insert = $mysqli->query($sql);     // Print response from MySQL   if ( $insert ) {     echo "Success! Row ID: {$mysqli->insert_id}";   } else {     die("Error: {$mysqli->errno} : {$mysqli->error}");   }    // Close our connection   $mysqli->close(); }  ?>


Does mongo *really* need a dedicated volume, if I need to back it up?

TLDR; What's the easiest way to automate a mongodb backup of a 20-gig DB? We run mongo on the same KVM (VPS) as the web app; the server runs Debian. We/I don't need/want to backup the entire fs on a daily basis, but definitely the Mongodb database. I don't really want to put Mongo in a separate volume, it complicates things and increases likelihood of downtime, especially when I need to expand the volume in question. However, using the LVM to create snapshots seems like the easiest (actually, the only) way forward. I've been told that when oplog is in use hot snapshots won't be corrupt. I  demonstrating how to set up this backup method, but it's almost 10-years out of date. Is there an easier way? I have read everything I could find, several times, on the man-pages. Thanks for reading :)


Will Ubuntu 20.02 run on Intel Core 2 Duo E8400 (2) @ 3.000GHz and 160GB of hardisk

I have a desktop of Intel core 2 and its a 64bit machine. Will ubuntu 20.02 run without any trouble? Thanks!


C++ nested class function return type and namespace

I have the following problem, with nested class(in this case a struct) namespace and return type  class Example { struct Node { /* with all the methods it needs */ } Node * func(); }   now I want to put the implementation of the func outside the class. So what I did is:  Example::Node * Example::func() { return nullptr; }   and it worked fine, until I made example template  template<typename T> class Example {/* all the same here */}  template <typename T> Example<T>::Node * Example<T>::func() {  return nullptr; }   where I got many errors. Then I tried   template <typename T> Example::Node * Example<T>::func() {  return nullptr; }   Where I get the error: "use of class template requires template argument list"  As far as I know Example<T>::func() is correct, because this means that function belongs to that namespace. But I'm not sure about the return type of my function. Any help?


I have a packet rate limit (max. 10 per seconds) which is set by my internet provider. This is a problem if I want to use the AceStream player, because if I exceed the limit I get disconnected.  How can I restrict the internet access of this program?  I tried the suggested command:  iptables -A OUTPUT -m limit --limit 10/s -j ACCEPT   but I get a fatal error message:  FATAL: Error inserting ip_tables (/lib/modules/3.2.0-67-generic/kernel/net/ipv4/netfilter/ip_tables.ko): Operation not permitted iptables v1.4.12: can't initialize iptables table `filter': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded.   With administor rights:  sudo iptables -A OUTPUT -m limit --limit 10/s -j ACCEPT   there is no errror message anymore. But it is still not working, I get disconnected.  Is there an error in the command line? Or do I have to use other arguments of iptables?  Below is the actual message that I get, when I exceed the limits of the provider.  Up to now, I tried different approaches, but none of them didn't work.  sudo iptables -A INPUT -p tcp --syn --dport 8621 -m connlimit --connlimit-above 10 --connlimit-mask 32 -j REJECT --reject-with tcp-reset  sudo iptables -A INPUT -m state --state RELATED,ESTABLISHED -m limit --limit 9/second --limit-burst 10 -j ACCEPT  sudo iptables -A INPUT -p tcp --destination-port 8621 --syn -m state --state NEW -m limit --limit 9/s --limit-burst 10 -j ACCEPT   This approach seems not to help in order to still use the application. So, I posted another question:  .


Labeling all sides of the matrix with kbordermatrix

I have a matrix with labels on the left and top. Now I want to have a label on all sides of the matrix. How can I change my code?  \documentclass[10 pt, a4paper, leqno, oneside] {report} \usepackage{kbordermatrix} \begin{document}  \renewcommand{\kbldelim}{(}% Left delimiter \renewcommand{\kbrdelim}{)}% Right delimiter \[   \tilde{\textbf{m}} = \kbordermatrix{     \mbox{} & c_1 & c_2 & c_3 & c_4 & c_5 \\     % & c_1 & c_2 & c_3 & c_4 & c_5 \\     r_1 & 1 & 1 & 1 & 1 & 1 \\     r_2 & 0 & 1 & 0 & 0 & 1 \\     r_3 & 0 & 0 & 1 & 0 & 1 \\     r_4 & 0 & 0 & 0 & 1 & 1 \\     r_5 & 0 & 0 & 0 & 0 & 1    } \]  \end{document}


Connection speed for a website from UK to Australia

I need to open a website only for Australian customers. The fact is that our provider's servers are all housed in the UK.  What do you suggest is better? Leaving our website in the UK? Or buy a service from an Australian provider?  How can I have (or where can I find) some statistics for traffic and connection quality and performance for a website from UK to Australia?  We don't use any country connection accelerator service.


While there be any issue applying for a new passport before stamping?

I applied for an H1B visa and it's been approved. I'm waiting for an appointment. But my passport will expire in 12-13 months. If I apply for a new passport now, and appear for visa stamping with the old and new passport, will there be any issue?   All the visa processing activities were done with my old passport.


I'm using owlapi to return the individuals of a given class. while testing the code using pizza ontology it works perfectly but when i test it on my ontology the following exception apear :  Exception in thread "main" java.lang.NoClassDefFoundError: dk/brics/automaton/BasicAutomata     at org.semanticweb.HermiT.datatypes.rdfplainliteral.RDFPlainLiteralPatternValueSpaceSubset.<clinit>(RDFPlainLiteralPatternValueSpaceSubset.java:49)     at org.semanticweb.HermiT.datatypes.rdfplainliteral.RDFPlainLiteralDatatypeHandler.registerPatternDatatype(RDFPlainLiteralDatatypeHandler.java:53)     at org.semanticweb.HermiT.datatypes.rdfplainliteral.RDFPlainLiteralDatatypeHandler.<clinit>(RDFPlainLiteralDatatypeHandler.java:45)     at org.semanticweb.HermiT.datatypes.DatatypeRegistry.<clinit>(DatatypeRegistry.java:44)     at org.semanticweb.HermiT.structural.OWLClausification$DataRangeConverter.visit(OWLClausification.java:744)     at org.semanticweb.owlapi.model.OWLDatatype.accept(OWLDatatype.java:141)     at org.semanticweb.HermiT.structural.OWLClausification$DataRangeConverter.convertDataRange(OWLClausification.java:730)     at org.semanticweb.HermiT.structural.OWLClausification$NormalizedAxiomClausifier.visit(OWLClausification.java:574)     at org.semanticweb.owlapi.model.OWLDataAllValuesFrom.accept(OWLDataAllValuesFrom.java:52)     at org.semanticweb.HermiT.structural.OWLClausification.clausify(OWLClausification.java:162)     at org.semanticweb.HermiT.structural.OWLClausification.preprocessAndClausify(OWLClausification.java:92)     at org.semanticweb.HermiT.Reasoner.loadOntology(Reasoner.java:210)     at org.semanticweb.HermiT.Reasoner.<init>(Reasoner.java:201)     at org.semanticweb.HermiT.Reasoner.<init>(Reasoner.java:175)     at org.semanticweb.HermiT.ReasonerFactory.createHermiTOWLReasoner(ReasonerFactory.java:51)     at org.semanticweb.HermiT.ReasonerFactory.createReasoner(ReasonerFactory.java:19)     at org.semanticweb.HermiT.ReasonerFactory.createReasoner(ReasonerFactory.java:15)     at Main.main(Main.java:40) Caused by: java.lang.ClassNotFoundException: dk.brics.automaton.BasicAutomata     at java.net.URLClassLoader.findClass(Unknown Source)     at java.lang.ClassLoader.loadClass(Unknown Source)     at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)     at java.lang.ClassLoader.loadClass(Unknown Source)     ... 18 more   I noticed that the problem is due to dataproperties that i'm using in my ontology. (when i delete all the dataproperties it works but when i add them the error appear again)


Most of the time  and UART come together in serial communication theories. Are they both the same? From my readings I concluded UART is a hardware form of the RS-232 protocol. Am I correct?


script for automount, using if statement. cannot got the result

This script should auto mount a file system on a Linux server.  testcheck=`df -h | awk '{print $6}' | grep "/test"`;  if [$tescheck -ne "/test"] then     mount /test else     echo "failed"; fi   I'm having a problem in the condition for making if statement true or false.  What am I doing wrong? Are there any alternatives that I can use?


Tigers are found both in Asia and in Africa.  Tigers are found both in Asia and Africa.    I could use in twice in this sentence. Can I omit it the second time?


I can't get my program to test: "java.lang.NullPointerException"

When I try and run the program this is what the computer returns:  First_Name    Last_Name   Test1       Test2       Test3       Test4       Test5       Average     Grade Exception in thread "main" java.lang.NullPointerException     at tests.Tests.main(Tests.java:132) C:\Users\Michael Jr\AppData\Local\NetBeans\Cache\8.1\executor-snippets\run.xml:53: Java returned: 1 BUILD FAILED (total time: 0 seconds)  package tests; import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; import java.text.DecimalFormat; import java.util.ArrayList; import java.util.List; /**  *  * @author Michael   */ public class Tests {     private String fname;     private String lname;     private int[] scores;       public Tests(String entry)     {         String[] data=entry.split(" ");         scores=new int[data.length-2];         this.setFname(data[0]);         this.setLname(data[1]);         for(int i=2;i<data.length;i++)         {             scores[i-2]=Integer.parseInt(data[i]);         }     }     public int[] getScores() {         return scores;     }     public void setScores(int[] scores) {         this.scores = scores;     }       public static String getAverageScore(int[] a)     {         int sum=0;         for(int e:a)         {             sum+=e;         }         return new DecimalFormat("##.##").format((double)sum/(double)a.length);     }       public static void showAverage(List<Tests> e)     {         for(Tests s:e)         {             System.out.println(s);         }     }     public String getGrade()     {         double d=Double.parseDouble(Tests.getAverageScore(scores));         if(d<=100 && d>=90)         {             return "A";         }         else if(d<90 && d>=80)         {             return "B";         }         else if(d<80 && d>=70)         {             return "C";         }         else if(d<70 && d>=60)         {             return "D";         }         else         {             return "F";         }     }     public String getFname() {         return fname;     }     public void setFname(String fname) {         this.fname = fname;     }     public String getLname() {         return lname;     }     public void setLname(String lname) {         this.lname = lname;     }     public String toString()     {         return getFname()+"\t\t"+getLname()+"\t\t"+scores[0]+"\t\t"+scores[1]+"\t\t"+scores[2]+"\t\t"+scores[3]+"\t\t"+scores[4]+"\t\t"+getAverageScore(scores)+"\t\t"+getGrade();     }       public static ArrayList<Tests> read(String path)     {         BufferedReader br = null;         try {               String sCurrentLine;             ArrayList<Tests> ar=new ArrayList<Tests>();             br = new BufferedReader(new FileReader("C:\\Users\\Michael Jr\\Desktop\\ch9_Ex13Data.txt"));               while ((sCurrentLine = br.readLine()) != null)              {                 ar.add(new Tests(sCurrentLine));             }             return ar;           }          catch (Exception e)          {           }          finally {             try {                 if (br != null)br.close();             } catch (IOException ex) {                 ex.printStackTrace();             }         }         return null;     }     public static void main(String[] a)     {         ArrayList<Tests> ar=read("E:/score.txt");         System.out.println("First_Name\tLast_Name\tTest1\t\tTest2\t\tTest3\t\tTest4\t\tTest5\t\tAverage\t\tGrade");         for(Tests e:ar)         {             System.out.println(e);         }     } }


How do I find the package that provides a file?

Simple enough question: is there some shell command (or GUI method) I can use that, given the path to a file on my system, tells me what package put it there? Assuming the file did in fact come from a package, that is.  Bonus question: what if it's a file that isn't installed on my system? Is there, say, a website that will let me look up a file and see what packages, if any, provide it?


Why (...) doesn't spawn a new child process when run in background?

After running the command     { sleep 5; } &     output of ps is   (output 1)   PID TTY           TIME CMD   972 ttys000    0:00.27 -bash  2556 ttys000    0:00.00 -bash  2557 ttys000    0:00.00 sleep 5      while for    ( sleep 5 ) &       out of ps is  (output 2)   PID TTY           TIME CMD  972 ttys000    0:00.28 -bash 2566 ttys000    0:00.00 sleep 5     () causes a subshell environment and I expect "output 1" for this case as it results in forking a child process while I expects "output 2" for { sleep 5; } & as it executes in the current shell. This might look a silly question but I really do not understand this behavior. What I am missing here?


Is the any software available to just prevent the desktop from accessing (ie I want to lock the desktop, but want to downloads to continue)  Previously  I was using  on Windows


What ubuntu/linux version of software can i use?

I am a python programer, and have been working on windows 8.1 and 10 for a while, but after a bit of research i think i want to switch to some ubuntu/linux software, which one should i use?


Rounding a number to 2 decimal places fails

I have a nasty bug in an interest rate calculation: I have to round the answer to the nearest cent, but  interest = Math.round(interest * 100) / 100;   removes the entire decimal portion. interest is a double type. Why is this? The equivalent code works fine in C++.


When do you unlock overwatch function in CSGO?

The question is simple, how many competitive matches do you need to unlock overwatch function in CSGO? Or what range do you need to be to unlock this function?


Characteristic equation of a recurrence relation

Yesterday there was a question here based on solving a recurrence relation and then when I tried to google for methods of solving recurrence relations, I found , which gave different ways of solving simple recurrence relations.    My question is how do you justify writing the recurrence relation in its characteristic equation form and then solving for its roots to get the required answer.  For example, Fibonacci relation has a characteristic equation $s^2-s-1=0$.  How can we write it as that polynomial?


How to recover/break password of Ubuntu 12.04 ?


A lot of designers discourage the use of tables but I have a layout where I'll use more div structure to achieve something made simple with a table..  Are tables bad for search engines?   edit: I will use CSS for the table to keep the HTML clean.


"Distribution not supported" when trying to install Intel Graphics Installer in Ubuntu

My Ubuntu version is new, and Intel Graphics Installer doesn't allow me to install the Intel video drivers. It says "Distribution not supported" How can I resolve this problem?


How can I transform OSM road data to a graph network in 2018?

I see a lot of questions in this topic, but most answers are at least 4-5 years old. I wonder if there is a more current solution that would allow me to gain a graph network from the OSM highways data.   Simplicity is key.   Previous discussions:


can anyone help me with this problem:  Show that for a manifold $M$, the tangent bundle $TM$ also has the structure of a manifold. If $M$ is an n-manifold, what is the dimension of $TM$?   for the 1st part it is enough to show that it is locally euclidean.  thanx.


According to my text book:  The Lorentz Force F on a charged particle moving in an electromagnetic field is given by:  $$F= qE + q(v\times B)$$  then it states that "it is to be pointed out that only the electric force does work, while the no work is done by the magnetic force which is simply a deflecting force."  How can this by true won't the the magnetic force have a considerable magnitude, will it now impart kinetic energy to the charge? Any explanations will help a lot. Please keep the terminology simple, thanks.


I am making a palindrome calculator. Here is my code  class test{ public static void main(String args[]) {     String word="";     String test="";     int left = 0;     int leftt = 1;      while(!word.equals("END")){         word = BIO.getString();                          test = word;         {             String wordLC = word.toLowerCase();             int rightt = wordLC.length()-2;             int right = wordLC.length()-1;             {                 if(word == "END"){                     break;                 }                        else if(word.charAt(left) == word.charAt(right) && word.charAt(leftt) == word.charAt(rightt)){                 System.out.printf("%-10s is a palindrome",word);                  }else{                 System.out.printf("%-10s is not a palindrome",word);                 }             }         } }   } }  I want to make it that when the word 'END' is put in, everything is shut down. I've tried to do this with the while and the if statement within the while.  The word END does end the loop, however it will carry on to state : "END   is not a palindrome".  where as I just want the loop to end.  Thanks


Vertical uniform circular motion.. can it really be uniform?

This is the picture in my mind:    For centripetal force, I learned that: $T-mg\cos\theta= \frac{mv^2}{r}$  In vertical circular motion, the velocity is naturally going to decrease as kinetic energy is converted to potential energy as the particle moves up the circle- and thus resulting into a non-uniform circular motion.  However, I was told that if tension changes accordingly, the velocity will remain constant(as from the equation). What I do not get about this part of the explanation is that which force will balance mgsinθ (tangential force in the diagram  )?


Hot to get rid of strange object borders

I'm following blender guru's tutorial for spaceship corridor and I found out that during panel moddeling phase I've god these strange borders/artifacts.  They are not visible from distance but when I zoom into some distance I can see them during rendering or modeling phase.  As you can see on the third image there is more places with dark areas.  I just joined simple objects like cubes and cylinders. I have no idea why is this happening.      -----


Intra-word bolding renders differently in preview than in actual posts

Consider the following markdown:  ab**cd**ef  あい**う**えお  அஆ**இஈ**உஊ   Here is the same markdown without four leading spaces:  abcdef  あいうえお  அஆஇஈஉஊ  Here is what this looks like (at the time of writing), in preview (e.g. when editing a question, writing a new answer, etc):    Here is what this looks like (at the time of writing), in actual questions and answers:    There is a clear inconsistency between what appears in the markdown preview and what actually appears in the question, but only for some strings of characters. This is a mild annoyance over at Japanese.SE (and possibly elsewhere), where this sort of bolding is often desired (yes, I'm aware that you can work around it by using <b>...</b> or wrapping the **...** in zero-width spaces, but people generally don't expect to have to do that).  To clarify, I'm not saying that intra-word **...** should produce bolding; I'm saying that the markdown preview should reflect the fact that intra-word **...** doesn't produce bolding.


If $G$ is a cyclic group of order $d$ with generator $a$, show that $\dfrac{\mathbb{Z}}{d\mathbb{Z}}$ is isomorphic $G$.

We have to $|G|=d$ and $G=\left<a\right>=\{a^n : n \in \mathbb{Z}\}$ by definition of cyclic group.  To show what you are asking, I want to define a function, not necessarily this $$\phi : \mathbb{Z} \to G \text{ such that } z \mapsto \phi(z)=a^d$$ and use the theorem: Let $\varphi:G \to G'$ be a group homomorphism, then $$\dfrac{G}{ker(\varphi)} \simeq Im(\varphi)$$  I need your help to define well a function that serves me.


python-matrix using nested lists- Unexpected output


If the images of vectors are linearly dependent, then they are linearly dependent

I know that if the images of vectors are linearly independent, then the vectors are linearly independent. But will the statement still hold if we change independent to dependent? I tried testing with common linear transformations and so far the case holds. Are there any counter examples to it?


Does "he's" mean both "he is" and "he has"?

Is it alright to use the same contraction, "He's", to mean both "He is" and "He has"?    Examples:   "He's angry."   "He's been angry."   "He's a beautiful house."


Why does demand for stock rise when a company appears to have high future value?

So a company decides to raise money by selling shares of its stock. The stock is offered at an initial price of their determination. The stock is then traded in a market where forces of supply and demand, as well as speculation, affect its price.  When a company performs well (or makes decisions that will likely increase the company's earnings in the future), more people want to buy that stock than do people wanting to sell it. This creates demand for that stock which causes its sell/bid prices rise. When a company performs poorly, the opposite occurs; more people want to sell the stock than want to buy. This creates a surplus that causes sell/bid prices to fall.  Understanding this, people speculate over company performance to determine the future behavior of a stock, and attempt to "buy low, sell high" or "borrow high, return low" in order to make a profit.  But my question is regarding the first part of that process. What is it about company performance that causes the perceived value of its stock to rise? This is especially perplexing since I would guess that most people don't exercise their voting rights, and many stocks don't pay dividends.  It's not like a shareholder has any direct financial gains from increased company earnings (speculative stock pricing notwithstanding).  What is the intrinsic value of the stock?  It seems to me that all participants in a stock market tacitly agree that stock price will have a direct correlation with company performance. So another way of asking the question is, would an opposite agreement hold? What financially (this isn't a question about logistics, communication, or feasibility) stops all participants in a market from agreeing to value a particular company's stock inversely with respect to the company's performance?  Since I feel like I can't quite nail down my question, another form of it would be, why is stock market behavior driven by company performance?


How to find Vout for the following band pass filter

I have a problem finding the following Vout for this circuit.  Is it possible to just use the following formulas that i have shown. I am just unsure due to the resistors.  I assume that what i have done is wrong as i might need to take the other resistances for Req.   In short this question is asking:  1.How to find Vout and Vin   How to find the transfer function for the whole band pass filter


Remove all or certain special Character from beginning of the String

I am running through a scenario where i have to create table through jdbc statement and i am receiving the table name as method argument. Oracle database is used and Oracle has naming rule like table name should not start with any of these following character $#_. I want to replace  all those special character only from the beginning but not from in_between or at the end. For example:  #_PHYSICIANS → PHYSICIANS  ##_#_PHYSICIANS → PHYSICIANS  ##_#_PHYSICIANS_#_NAME → PHYSICIANS_#_NAME  What Regular expression shall I use to replace these characters from the beginning?


I own a Acer Aspire es1-532-c5yw, and it's celeron processor is no where near what I need. I don't have enough money, however, to afford to buy a laptop with at least an i5. I was therefore wondering if you would be able to replace the CPU (that's soldered to the motherboard) with a better one, and if so what would be the upgrade limits?  Thanks, Owen


I've bought a 12VDC pump for a CNC machine I'm building. I want to get a connector that will fit this plug so that I can run it from my power supply source.  The problem is that I don't know what these connectors are called in order to buy a suitable plug.  Anyone know what this type of connector is called?


What is the minimum distribution for LaTeX

I am using LaTeX to document a system I am developing. The system is itself a development environment which will be generating documentation. What is the minimum distribution I need to include in my system in order for users to produce documents from the generated LaTeX code.  What is the minimum distribution that will meet the first requirement, and satisfy all the license conditions of all distributed material (I assume this will be larger).  In response to comments:  OS Window XP Distribution MikTex + TexNic centre


EEFileLoadException when using C# classes in C++(win32 app)

For deployment reasons, I am trying to use IJW to wrap a C# assembly in C++ instead of using a COM Callable Wrapper.    I've done it on other projects, but on this one, I am getting an EEFileLoadException.  Any help would be appreciated!  Managed C++ wrapper code (this is in a DLL):  extern "C" __declspec(dllexport) IMyObject* CreateMyObject(void) {     //this class references c# in the constructor     return new CMyWrapper( ); }  extern "C" __declspec(dllexport)  void DeleteMyObject(IMyObject* pConfigFile) {     delete pConfigFile; }  extern "C" __declspec(dllexport) void TestFunction(void) {     ::MessageBox(NULL, _T("My Message Box"), _T("Test"), MB_OK); }   Test Code (this is an EXE):  typedef void* (*CreateObjectPtr)(); typedef void (*TestFunctionPtr)();  int _tmain testwrapper(int argc, TCHAR* argv[], TCHAR* envp[]) {     HMODULE hModule = ::LoadLibrary(_T("MyWrapper"));     _ASSERT(hModule != NULL);      PVOID pFunc1 = ::GetProcAddress(hModule, "TestFunction");     _ASSERT(pFunc1 != NULL);     TestFunctionPtr pTest = (TestFunctionPtr)pFunc1;      PVOID pFunc2 = ::GetProcAddress(hModule, "CreateMyObject");     _ASSERT(pFunc2 != NULL);     CreateObjectPtr pCreateObjectFunc = (CreateObjectPtr)pFunc2;      (*pTest)();  //this successfully pops up a message box     (*pCreateObjectFunc)();  //this tosses an EEFileLoadException      return 0; }   For what it's worth, the Event Log reports the following: .NET Runtime version 2.0.50727.143 -  Fatal Execution Engine Error (79F97075) (80131506)  Unfortunately, Microsoft has no information on that error.


Let $S$, $T$ be linear operators on a finite-dimensional vector space $V$ over $\mathbb{C}$. Suppose $$S^2 = T^2 = I.$$ Show that there exists either a $1$-dimensional or $2$-dimensional subspace of $V$ which is  invariant under $S$ and $T$.  Ok so, since $S^2 = T^2 = I$,  either $1$ or $-1$ are Eigenvalues of S and T. i,e  The Minimal Polynomial $M_T$ and $M_S$ satisfy $$M_T \; | \;  (x+1)(x-1)$$ $$M_S \; | \;  (x+1)(x-1)$$ Edit : Found the same question elsewhere. For those of you who are interested in the answers.


Find the sum of $$ \frac{\text{x}}{\text{x}+1}+\frac{\text{x}^2}{\left( \text{x}+1 \right) \left( \text{x}^2+1 \right)}+\frac{\text{x}^4}{\left( \text{x}+1 \right) \left( \text{x}^2+1 \right) \left( \text{x}^4+1 \right)}+... $$   where $x>1$   This is a question from The Art and Craft of Problem Solving. I tried using partial fraction, but it did not seem plausible for me. Also, I can not spot how to use the condition x>1


Field inside a hollow sphere uniformly charged

How to prove that field inside a hollow sphere is zero anywhere inside that sphere using solid angle concept?


How do restaurants make chicken fried rice? What ingredient am I missing?

Everytime I try to make chicken fried rice like I get at the take out place it never tastes like it does when they make it. We all know the basic ingredients  Rice (1 day old), Chicken, Green Onions, Sprouts, Eggs, Soy Sauce, MSG (optional)  I have a wok and I cook it just like them, I've heard all sorts of things as to what the "missing" or "secret" ingredient is. Some say it's a different type of soy sauce (not the standard La Choy) that they use.   I've been searching for definitive answers for this for a long time. It seems no one knows or anyone who's worked in a chinese place doesn't wish to share the knowledge. I went as far as adding MSG thinking that was what made the take-out place's Fried Rice taste different. MSG helps (sold as Accent Flavor Enhancer in your spice aisle) but that's not it.


I was doing test. It says the following sentence is correct:  The aviation influenza is so deadly a disease all countries are trying to find a cure for it.  But as we know, we use such+ adjective+ noun.....and so + adjective without noun....  So, ı was confused. Could you comment on this please.


In the construction of types of numbers, we have the following sequence:  $$\mathbb{R} \subset \mathbb{C} \subset \mathbb{H} \subset \mathbb{O} \subset \mathbb{S}$$  or:  $$2^0 \mathrm{-ions} \subset 2^1 \mathrm{-ions} \subset 2^2 \mathrm{-ions} \subset 2^3 \mathrm{-ions} \subset 2^4 \mathrm{-ions} $$  or:  "Reals" $\subset$ "Complex" $\subset$ "Quaternions" $\subset$ "Octonions" $\subset$ "Sedenions"  With the following "properties":   From $\mathbb{R}$ to $\mathbb{C}$ you gain "algebraic-closure"-ness (but you throw away ordering). From $\mathbb{C}$ to $\mathbb{H}$ we throw away commutativity. From $\mathbb{H}$ to $\mathbb{O}$ we throw away associativity. From $\mathbb{O}$ to $\mathbb{S}$ we throw away multiplicative normedness.   The question is, what lies on the right side of $\mathbb{S}$, and what do you lose when you go from $\mathbb{S}$ to one of these objects ?


Any Word Denoting "participating college lecture without enrollment"

I would like to taking a course in other college in my university without actual enrollment.  I need to mail this request to the professor who is in charge of that class but I don't know how westerners are describing this concept in one word.


Find the limit: $$\lim_{x\to0}{\frac{x^2\cdot\sin\frac{1}{x}}{\sin x}}$$ After treating it with l'Hopital rule, we get: $$\lim_{x\to0}{\frac{2x\cdot\sin \frac{1}{x}-\cos\frac{1}{x}}{\cos x}}$$ Now, the numerator of fraction doesn't have a limit, so I can't use l'Hopital rule again. What to do? I can split it into two fractions, but I'm not sure how would it help: $$\lim_{x\to0}{\frac{2x\cdot\sin \frac{1}{x}}{\cos x}} - \lim_{x\to0}{\frac{\cos\frac{1}{x}}{\cos x}}$$


How to generate a matrix from an arbitrary sequence of arguments?

shows me how I can handle an arbitrary number of arguments. I have adapted it a bit to my purpose:  \usepackage{pgffor} \newcommand*{\twolinematrix}[1]{%     \foreach \firstrowelement/\secondrowelement in {#1} {%         <something should happen here!}%     }  }   The above macro should take input like this as an example: \autotwolinematrix{1/6, 2/7, 3/8, 4/9, 5/10}.  I have become stuck because, normally, if you want to create a matrix (assuming you have amsmath loaded), you would so something like:  \newcommand{\manualtwolinematrix}[10]{%     \begin{matrix}          #1 & #2 & #3 & #4 & #5 \\         #6 & #7 & #8 & #9 & #10     \end{matrix}% }   So, this suggests that you'd need to have logic that knows when you are about to be done with the element pairs, because you have to put the \\. I think if we are programmatically generating the matrix, it would be better to think of it like this:  \newcommand{\manualtwolinematrix}[10]{%     \begin{matrix}          #1 & #2 & #3 & #4 & #5 \\ #6 & #7 & #8 & #9 & #10     \end{matrix}% }   where #1 & #2 & #3 & #4 & #5 \\ #6 & #7 & #8 & #9 & #10 is the string that has to be auto-generated within the body of our macro. Our macro gets input pairwise, so we have to generate this string given pairs. Okay, then in the body of our macro, we should have two variables: call it \firstrow and \secondrow.  The \firstrow and \secondrow should be built up sequentially, given each pair of elements, and then finally a variable called \matrixbody should be generated like so:  \matrixbody = \firstrow \\ \secondrow  Can you help me put these thoughts together?


"Cannot Open DDE Link to": Problems with Adobe Acrobat Pro and WinEdt

While using the 2017 release of Adobe Acrobat DC, I get the error    every time I run PDFLatex with my PDF open. When I use PDF Search, I get the same error.   Does anybody know what do I have to change in the .edt files to make it work?


Is there a way to reboot with a different kernel version from the command line?  I have Ubuntu PXE booted on a VM, and there is no graphical interface, but I need to downgrade the kernel (which is installed).


Why does my website appear in higher up in Google Search but then decrease?

I am managing a WordPress website which offers tutorials on different concepts. Some of the keywords are coming between 3-4th page of Google search but some of them are above 10th pages.  Sometimes they appears 2-3th page or sometimes they disappears completely. I don't know what's going wrong.  I am using Yoast SEO for managing SEO part of my website. Can someone please provide me which is the best Yoast settings which works good.  One more thing I want to ask, I am keeping meta keywords and description same like "Java tutorial", "Java", "programming", etc... so both meta keywords and the description are the same. Can I do this, is it acceptable?


What is the sum of $\arctan\frac{1}{2r^2}$ with $r$ going from $1$ to $\infty$ ?  I know this has to be reduced as a telescoping sum. Just cant quite do it. Just need a hint.


What's the best way of implementing a thread-safe Dictionary?

I was able to implement a thread-safe Dictionary in C# by deriving from IDictionary and defining a private SyncRoot object:  public class SafeDictionary<TKey, TValue>: IDictionary<TKey, TValue> {     private readonly object syncRoot = new object();     private Dictionary<TKey, TValue> d = new Dictionary<TKey, TValue>();      public object SyncRoot     {         get { return syncRoot; }     }       public void Add(TKey key, TValue value)     {         lock (syncRoot)         {             d.Add(key, value);         }     }      // more IDictionary members... }   I then lock on this SyncRoot object throughout my consumers (multiple threads):  Example:  lock (m_MySharedDictionary.SyncRoot) {     m_MySharedDictionary.Add(...); }   I was able to make it work, but this resulted in some ugly code.  My question is, is there a better, more elegant way of implementing a thread-safe Dictionary?


What are best SEO practices when deleting a webpage? What return code should I use?

On a live site, let's say there is a page that is really outdated with old information.  Is it ok to just delete it? Or do I have to setup an Apache redirect or do a 404 or something special for the web crawlers?


How to get exact decimal value from bigdecimal in java

I am trying to get number of digits after decimal point in BigDecimal value.  BigDecimal big = new BigDecimal(1231235612.45);     String[] str = big.toPlainString().split("\\.");      System.out.println(" Decimal Value: " + str[1]);   Using this I am getting following output - Decimal Value: 4500000476837158203125. Actualy I want to display only 45 as per the original BigDecimal value (1231235612.45). So, my expected output is Decimal Value: 45. But, while conversion it adds more digits after decimal points. Is there any method or code to get exact same value from BigDecimal?


How do I apt-get -y dist-upgrade without a grub config prompt?

Per   I did the following:  ec2run ami-3c994355 --region us-east-1 -n 1 -t m1.large -z us-east-1d   On the machine:  sudo apt-get update sudo apt-get -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" dist-upgrade   I still get a prompt asking me which config file I want to use. These are the lines that come before the prompt:  Setting up grub-pc (1.99-21ubuntu3.1) ...   then:                           ┌───────────────────────────────────────────────────────┤ Configuring grub-pc ├───────────────────────────────────────────────────────┐                                                        │ A new version of configuration file /etc/default/grub is available, but the version installed currently has been locally modified.  │                                                        │                                                                                │                                                        │ What do you want to do about modified configuration file grub?                                                                      │                                                        │                                                                                │                                                        │                                     install the package maintainer's version                                                        │


Python String to dict while separator is '='

Hy i have a list of strings which look like:  atr = ['ID=cbs7435_mt', 'Name=cbs7435_mt', 'Dbxref=taxon:981350', 'Note=Pichia pastoris CBS 7435 mitochondrion%2C complete replicon sequence.', 'date=27-FEB-2015', 'mol_type=genomic DNA', 'organelle=mitochondrion', 'organism=Komagataella pastoris CBS 7435', 'strain=CBS 7435']   Now i want to create a dictionary which should look like:  my_dict = {'ID': 'cbs7435_mt', 'Name':'cbs7435_mt', ...}   Do someone has any advice how i could manage this? Thanks already!


Example of a ring satisfying Euclid's lemma, but with no gcd and/or lcm.

I am looking for an example of ring $A$, where the Euclid lemma is true. But, the ring A contains two elements $a$ and $b$ with non gcd, and lcm. I know that a notherian ring is factorial iff the Euclid's lemma is valid. Thus, $A$ mustn't be noetherian. The ring of the entire complex functions, and the ring of algebraic integers, aren't noetherian, satisfy Euclid's lemma, but all pair of elements have a gcd and lcm.... Edit : The version of the euclid lemma that I have in mind is : if $p$ is irreductible and $p$ divides the product ab then $p$ divides $a$ or $p$ divide $b$.


My requirement is that shell script should print the folder name of the file.  For example comp.class is present in D:/Practice/HelloWorldPractice/bin folder, I should get output after executing command is bin.  My command searches a file and prints the full path of that file . After that, it removes the filename from full path. At the end, it remove everything except folder name of file.  code  filesDirName="/D/Practice/HelloWorldSagar" file=comp.class echo $(find "${filesDirName}" -name ${file}) | awk -F '${file}' '{ print $1 }'| awk -F '${filesDirName}' '{ print $2 }'   output     empty output  code  When I am entering below command in terminal it is working fine.... But when I am doing it through variables, I am not able to get output.  echo "$(find "/D/Practice/HelloWorldSagar" -name comp.class)" | awk -F 'comp.class' '{ print $1 }'| awk -F '/D/Practice/HelloWorldSagar' '{ print $2 }'   output  /bin/


How much time should I budget to get to CDG airport?

I will be staying in the 11th arrondissement of Paris, and I will need to get to CDG for an 11:30 flight. I have two questions:   Does it make more sense to take public transport, or to take a taxi? In each case, how much time should I allow to get there?


Regex Number Capture Without Percent Sign

Overall Goal: I would like to be able to capture a positive or negative number that looks something like this: xxx.xxx I am also using Google Sheets, so I cannot use any lookarounds Example Criteria:  +123.123  --->  123.123  +30%      --->  30  +4%       --->  4  -1%       --->  -1  0         --->  0  +12       --->  12  -3        --->  -3   What I've Tried: The main regex I've been using is: -?\d+.?\d*. The problem with this one is that it also captures the percent signs, which I do not want. Percent signs seem to be considered part of the number. I've also tried: -?\d+.?\d+. This one runs to the problem of not capturing single digit numbers.


How do I add a launcher for .sh applications?

I have installed ubuntu (11.04).  I installed phpstorm which is simply an archive for you to extract and shove in your /opt directory.  To run it you would use /opt/PhpStorm-103.243/bin/PhpStorm.sh  In unity I had created a launcher on my desktop.  Now I have installed gnome-3(gnome-shell),  And I have nothing in my desktop.  So how do I run phpstorm quickly? Can I get it to show up in "applications"?


Is is possible to display an image or icon in a Email using a Visualforce template?

I am trying to send an email using a Visualforce template and I want that template to include an icon. Is this possible?


Using the verb 'have' instead of the verb 'eat'

I used to think that the verb have can only be used when we talk about meals, which   an occasion when people sit down to eat food, especially breakfast, lunch, or dinner. But I see native speakers say:     I eat breakfast.   I mean they use the verb eat for a meal like breakfast or dinner. So my questions are:   Is this common to say "I am eating breakfast, lunch or dinner"  for a meal time? Can we use the word have with the word eat interchangeably?   For example when somebody phoned us while we are eating something (at anytime) and asks      What are you doing?   Can we also say:     I having some pizza now. I'll call you back.


High. My name is Festus.  I'm creating a web site for a customer and would prefer not to have Google index the site while it's still being developed. The customer, on the other hand, must be able to access the unfinished site.  My solution was to give the site an unusual hostname. I used myCustomerName.domainName.com with the thought that there's no way Google would be able to guess that hostname and therefore crawl/index it.  Nevertheless, Google found and indexed the page despite my 100% certainty that there are no external sites that link to it. I found out later that someone at the customer's site had been typing myCustomerName.domainName.com into the Google search engine instead of the address bar. That's how Google found out about it. (I have no idea why someone would type the custom hostname into Google's searchbox instead of the address bar, but they did).  Now unfortunately the site shows up in Google as a search engine result. Here's what I've done so far.  (1) I researched robots.txt and disallowed access to the entire site.  (2) I went to Google's Page Remove tool and asked the page to be removed. I got a successful response saying that the page was in fact removed. The status is now set to "removed."  ...and yet the page still appears in Google search results. Any idea why? I guess I could always rename the host to `someOTHERrandomString.myDomain.com' but I'd like to know why Google Webmaster tools show the page as "Removed" as of April 3 but it's still highly ranked on the search engine page.  According to Google: "We won't index the page if it's blocked in robots.txt and there is an active URL removal request for the page." I've done both of those things, and again, there are no external sites linking to the custom hostname.  So what's up?