Beamer title page: inserting 2 supervisors names with different universities

I would like to reproduce the file as shows the picture attached to this message, specially the part circled in red color. Thank you in advanced.  This is the minimal working example code:  \documentclass{beamer} %slides \usepackage[utf8]{inputenc} \usepackage[french]{babel} \usepackage {textcomp} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{url} \usepackage{graphicx} \usepackage{xcolor} \usepackage{topcapt} \usepackage{setspace} \usepackage{bbding} %Checkmark \usepackage{lmodern} \usepackage{subfig}  \usetheme{Warsaw} \useinnertheme[shadow=true]{rounded}  \setbeamercovered{transparent}  \date{\today}  \title[Titre]{Titre} \institute{Université}  \author[author1]{Student\inst{1}\\[1ex]  {\small supervisor1\inst{1} supervisor2\inst{2}}}  %%%%%%%%%%%%%%Insertion numéros de page et courte version du titre \expandafter\def\expandafter\insertshorttitle\expandafter{%   \insertshorttitle\hfill%   \insertframenumber\,/\,\inserttotalframenumber}  \begin{document}      \maketitle  \end{document}


Equal, is equal to, equals, are equal to

Which is correct?  Given 240 kph (240 kilometres per hour) = 149 mph (149 miles per hour)  How does one say this?     -240 kph equal 149 mph.   -240 kph equals 149 mph.   -240 kph is equal to 149 mph.   -240 kph are equal to 149 mph.    Is 240 kph singular or plural (kilometre or kilometres)? Or 240 kph is a separate kind of thing?


Let m, n be positive integers. Show that Zmn and Zm × Zn are isomorphic if and only if m and n are coprime (i.e. gcd(m, n) = 1).

I'm working on the following problem:  Let m, n be positive integers. Define addition on Zm ×Zn by (a, b)+(x, y) = (a+x, b+y). Show that Zmn and Zm × Zn are isomorphic if and only if m and n are coprime (i.e. gcd(m, n) = 1).  I can't understand how to define a map from Zmn to Zm x Zn as in Zmn you take a pair of integers and add them together mod mn while in Zm x Zn you have to take two pairs of integers. Can someone help me make sense of this?


If a living Horcrux was killed "normally", would they stop being one?

Inspired by trying to answer . Spoilers for book 7.      We know that when Voldemort "killed" Harry Potter, this destroyed the fragment of Voldemort's soul that was connected to Harry making him the 7th Horcrux.    Would the 8th fragment of soul in him be destroyed if he had been killed by some other means (say, a stray Avada spell during the Battle of Hogwarts, or drowned under the ice trying to retrieve the Sword)?  I'm looking for canonically supported answer, not simply speculation.


Refresh lightning web component after making code changes without clearing browser cache

I am facing a peculiar issue while making changes to lightning web component. Once the changes are done and deployed on to higher orgs, for some users the new javascript changes are not reflecting and the LWC is executing the older version of the javascript. Since Salesforce caches the definition of the LWC, it executes the outdated version of the javacript which is stored in the browser cache.  The issue is resolved only by clearing the browser cache for all the impacted users which is not a feasible solution for production. Is there a way that the definition for LWC can be refreshed from the server so that the LWC always executes the latest code?


Scenario  I sent my person to our client's site but the client's office  was closed. Two days later he called me to enquire about the visit.   Which tense should I use. Past perfect or simple past? Why?  E.g.     I sent my person to your office but it was closed    Or should I use past perfect      I had sent my person to your office but it was closed


What is a word that could define someone who likes to cause conflict?

What would you call someone who does things knowing specifically that his/her actions will cause pain and/or conflict or completes an action just to get someone in trouble or hurt them?   For example, in  there are two people that are in love, but the Colonel goes out of his way to tell the father of the girl that the boy is a thief and would be bad for their reputation.   What is a word that would describe him?


Again, "if it wasn't" or "if it weren't"?

I have read a lot of information about this topic, but I still don't know why my book says that the answer is "wasn't" in the following sentence:  If the driving test ___________ so difficult, there would be more accidents.  If this is a hypothetical case (the fact is the test is difficult, not easy), why does my book say the answer is "wasn't" and not "weren't"?


(Ordinal number)How to prove that epsilon-naught is countable without using Axiom of Choice?

How to prove that epsilon-naught is countable without using Axiom of Choice?  or, Can we explicitly show that there is isomorpism between epsilon naught and subset of rational number?


How to return a column that links to 2 different tables in MySQL?

Very new to SQL and I built a DB that stores information about companies. In the query below, I am trying to display the founder and ceo's name, but I am getting ambiguity errors.   I joined the founder table and ceo table onto the person table which stores the first and last name of the ceo/founder. The foreign key shared among all 3 tables is pid (person ID). I ran into issues with my select statement when I tried to return the names. I then tried adding the joined table name in from of the column name (founder.first_name and ceo.first_name), but that didn't work.  SELECT co.ein,        company_name as Company,        CONCAT(fo.first_name,' ',fo.last_name) as Founder,        CONCAT(ceo.first_name,' ',ceo.last_name) as CEO,        CASE          WHEN last_price IS NULL THEN '-'          ELSE CONCAT('$',FORMAT(last_price,2))        END as 'Current Stock Price' FROM company co LEFT JOIN stock s ON co.ein = s.ein LEFT JOIN ceo ON co.ein = ceo.ein LEFT JOIN founder fo ON co.ein = fo.ein LEFT JOIN person p ON ceo.pid = p.pid LEFT JOIN person ON fo.pid = p.pid   I need to return the Company Name, Founder's Name, CEO's Name, and Current Stock Price.


infinitude of primes that are $11 \bmod 12$

Suppose there are finitely many primes $\{p_1, \ldots, p_k\}$ which are $11 \pmod {12}$ and consider $p = (p_1 \cdots p_k)^2 + 10$. Then $p_i \nmid p$ for any $i \leq k$, and $p \equiv 1 + 10 \equiv 11 \bmod 12$. Then $p$ is either a prime itself, contradiction, or $p$ has all prime divisors of the form $12n + 1, 12n + 5, 12n + 7, 12n + 11$. Not all prime factor are of the forms $12n + 1, 5, 7$ because then $p \equiv 1, 5, 7 \mod 12$. So it must have a prime factor $12n + 11$, but $p_i \nmid p$ and so we have a contradiction.  Is this proof valid?


Why do you need debroglie wavelength less than nucleus diameter to probe a nucleus via deflection?

e.g. you need to give enough energy to electrons to probe a nuclear structure via deflection.


I have a class with a few StringProperties,  I'm wondering if there's a way reset the StringProperties to defaults each time I call the class. I tried adding defaults like this but if I call with 'YES' it remembers the 'YES' the next time I call it.  cutline = bpy.props.StringProperty(name='Cutline',default='NO')    live = bpy.props.StringProperty(name='Live',default='NO')    insetted = bpy.props.StringProperty(name='Insetted',default='NO')    drawtype = bpy.props.StringProperty(name="Draw Type",default='BOUNDS')


If $X$ generates $\Bbb{Q}$ then $X\setminus\{x\}$ also generates $\Bbb{Q}$

If $X$ is a generator subset of $\Bbb{Q}$ then for $x\in X$,   $X\setminus\{x\}$ also generates $\Bbb{Q}$.   Clearly if I can express $x$ as a combination of the remaining generators we are done. After struggling for an hour I took a different approach: tried to show that if $\langle X\setminus\{x\}\rangle\not=\Bbb{Q}$, $\langle X\setminus\{x\}\rangle$ is a maximal subgroup of $\Bbb{Q}$. That is, if $G\leq\Bbb{Q}$ and $\langle X\setminus\{x\}\rangle\subset G$, then $G=\Bbb{Q}$. For this purpose it is enough to show that $x\in G$. But I doubt that this is true. Any ideas?


How to create shortcut for a command in terminal?

I want to create a shortcut for a command in terminal. Like for a command  "ssh user@123.45.7.123", I just want a command "user" and the above command will run. Is this possible, and if so how can it be done?  Thank you!


How much memory does Windows 7 64x use for itself?

I'm generally very picky about what my computer does - I'm disabling a lot of stuff that I don't like (i.e., different MS office, nvidia, creative stuff that tries to autorun), I constantly monitor my computer for all sorts of misbehaving programs.   My AV of choice is Kaspersky and I think I'm pretty secure from viruses because I never visit fishy sites like poker/porn, and never install programs from unconfirmed sources.  However, I have just randomly checked and it seems that after I freshly start my PC, about 1.5GB of 8GB RAM is already used up! In the Task Manager, "all user's processes" ticked of course, top users are explorer.exe at 73MB, SQL Server at 51MB and dwm.exe at 28MB. I've manually calculated total amount for all processes that are running, and came to a number of less than 400MB (had to round up everything to count only megabytes).  So, is it true that the system itself uses 1.1GB? Because I've googled and people report their PC uses only ~500MB memory when just started.   If no specific information is available, maybe someone could give me advice about how to find out what else uses RAM (except what is listed in Task Manager)? So I could track whatever is hogging that gigabyte of RAM.


If I am now a Australian citizen and I still have a NZ passport

If I am now an Australian citizen and I still have a NZ passport, can I travel on my NZ passport?


In the context of physicalism, Is it consistent to think that I am what I experience and also the physical processes which give rise to my experiences?


Can I get Schengen visa after being convicted and deported from UK 12 years ago?

12 years ago, I was convicted for false document deception for 12 months and was deported from the UK to Kenya. However, I didn't disclose my real details including DOB throughout the incident, I only gave different details. Now I just got a new passport with my real details and real DOB. Can I travel to Schengen countries like France, Germany etc? Will they discover my conviction and deportation through fingerprints? Thanks.


Logistic regression in R with numeric fixed effect that has some 0-variance values

I am running a logistic regression in R, such as: glm(cbind(successes,tries-successes) ~ A + B, family="binomial")  A is numeric, B is a factor. A only contains 4 different unique values; 2 of these never lead to 'successes', one value almost never does and the fourth value leads to a lot of successes. All 4 values are on a clearly interpretable linear scale, but it seems there is sort of a threshold value, above which successes can be reached. The factor B has two levels, both of which can lead to successes. When I run the GLM and look at my estimators for the different levels of B, the confidence intervals are huge. If I run the same GLM only including B, the confidence intervals for the estimators are reasonably narrow. If I run the full model, but treating both, A and B as factors, I also get reasonable confidence intervals. This leads me to the conclusion that including A as a numeric fixed effect 'ruins' the model. However, turning it into a factor also doesn't seem right, as the order (and possibly magnitude) does matter. So my questions are:  Would it make sense to treat A as an ordered factor? This looses information on the magnitude of differences on the numeric scale, but at least keeps the ordering. And it seems to be the only way of building a functioning model including both, A and B. Why do I see this weird behaviour that A as a numeric variable 'destroys' the whole model? I find this especially intriguing, as there is no interaction term included. Do you think there is another way of solving the problem? Would it help including B maybe as a numeric column, but within a quadratic term, to acknowledge more this kind of 'threshold' behaviour?


Difference between 'in order to', 'so as to,' 'to'

I'm a Korean and I learned in school that 'to' is equal to 'in order to' and 'so as to,' if they are used in expressing intent.   Are the sentences "I study in order to achieve my goal" and "I study so as to achieve my goal" same, in terms of nuance? If there's even the slightest difference when viewed by a native speaker, please elaborate! :)


Assignment Basic data I was launching a rocket model and I tried to calculate the reached altitude.  The engine (C6-0) impulse is 10 Ns Total weight is 65,7 g (includes the engine)  I calculated speed = 152 m/s $$\vec F \cdot t = \Delta m \vec v$$ Then I calculated the altitude 1007 m which seems too much to me. I guess something about 200 m (you may see the video) $$y_{\max} = \frac{v_0^2 \ }{2 g}$$ Drag I guess, I have to consider drag  Diameter of rocket 2,5 cm Drag coefficient 0,05 (I guess)  $$F_D\, =\, \tfrac12\, \rho\, v^2\, C_D\, A$$ But what about now, what is really achieved altitude? Engine description  (source: )  (source: ) Rocket Altitude Calculation


Convolution of $\chi_{[0,1]}$ with itself

The characteristic function of a set $E$ is defined as follows: $\chi_{E}(x) :=1 \space \text{if} \space  x\in E, \space \text{and} \space \chi_{E}(x) := 0 \space \text{if} \space x \notin E.$ Find a formula for the convolution $\chi_{[0,1]} \star \chi_{[0,1]}(x).$    I have that  $$\int^{\infty}_{-\infty} \chi_{[0,1]}(x-y)\cdot \chi_{[0,1]}(y)dy= \begin{cases}     0 & \text{if }x\notin (0,2) \\    x & \text{if }x\in (0,1] \\ 2-x & \text{if }x\in (1,2). \end{cases}$$    Is the above computation correct? Thank you for your feedback in advance.


Why cannot a user change group ownership of his own files?

Why cannot a user change the group permissions of files which he owns. Let's suppose I have user martin:  $ ls -lAd /home/martin/ drwx------ 8 martin martin 4096 Apr 20 01:06 /home/martin/   For some reason, I want user paul to be able to access my home.  $ chgrp paul /home/martin/ chgrp: changing group of `/home/martin/': Operation not permitted   Is there a security reason why a user cannot change the group ownership of his own files?  I am using  (wheezy).


How to simplify fraction with fractional exponents

What are the steps to simplify  $\left(\dfrac {3x^{\frac 3 2} y^3} {x^2 y^{-\frac 1 2}}\right)^{-2}$?  I am able to simplify the fractional exponents into radicals, but I am having trouble getting to the solution of $\dfrac x {9y^7}$.


$n^x$ are rationals for all positive integers n, show $x$ must be an integer.

I wanna show that if $n^x$ are rational for all positive integers n, then we may conclude $x$ is an integer. First of all, WLOG, we may assume $x$ is a real number between 0,1. I think it suffices to show that for R={$log_p q$, where p,q are coprime positive integers bigger than 1}, then the elements of R+R contained in R must be two pairs with same p. But I stuck at proving my conjectural statement...


How to encircle /square rows/elements and block this Matrix

The following matrix is my desired matrix form :  I attempted to use the nice matrix environment since it offers a solution encircling/squaring rows and elements as seen in this photo above. The only problem is that I couldn't find a way to obtain the blocked partition as seen in the photo and I have scanned this manual  and their partitioning of the matrix would look like two lines intersecting each other different from what I need here in this photo. Therefore, I would hope someone could assist me in writing a code to obtain this matrix as it is in this photo and I would be very much thankful.


Does Blender support dual-GPU rendering if the two GPUs aren't the same?

I have a GTX 1060 6GB in my current build, and I also have a GTX 960 2GB in storage. I was wondering if I got , and got both of my GPUs in one build (not SLI or CrossFire, just in the same system) would I be able to use both GPUs for rendering simultaneously? I don't care if this means having them both render separate tiles in one instance of Blender, or rendering separate frames in two instances. I'm using Cycles for everything I do.


Lebesgue integral equals Riemann Integral on $\mathbb{R}$

I know that if a function $f:[a,b]\rightarrow \mathbb{R}$ is Riemann Integrable  then it is Lebesgue Integrable there with respect to the lebesgue measure and the integrals coincide. Does this theorem also apply to improper Riemann integrability on unbounded intervals of the real line e.g. over $\mathbb{R}=(-\infty,\infty)$ itself?


So I'm trying to have my X-Wing and Tie fighter exhausts light up like the ones below.   Currently, they just look like this which isn't that nice. The material is just a red emission for the Tie fighter and a yellow emission for the X-Wing.   Anyone got any ideas on how to accomplish this effect, would it be something I would do later in After Effects. Also, how would I go about creating the laser beams like the ones in Image 1?, I was thinking of just using the saber plugin for After Effects but they never look that nice.   Thanks in Advance


What's the rule for doubling 't' in verbs like 'getting' vs. 'targeting'

In verbs that end with "et", what is the rule for doubling the final consonant for present participle?  Examples where doubling is used:   getting typesetting forgetting   Examples where a single 't' is written:   targeting marketing pocketing


Are there relation between CPU's Ghz and RAM's Mhz?

Could I predict what frequency of RAM should be knowing frequency of CPU ?


How do I improve the quality of lowlight back-lit bottle photographs with a point and shoot camera?

I'm a complete novice at photography, but I want to learn to take pictures of "bottle lights". I have included an image which I took with my Samsung ST60, but as you can see, it looks terrible and doesn't do the light justice at all. If purchasing something will help, I'm willing to spend a max of £250. Any thoughts will be greatly appreciated!


How to break lines in conditions using algorithm2e?

I am trying to (partially) reproduce the algorithm displayed in Figure 4 from   My problem is with the multi-line conditions present in the "IFs". I want them to be indented, but \Indp does not seem to take effect if a new line \\ is not present in the same line.  This is what I tried:  \begin{algorithm}[htb]     \SetAlgoNoLine%     \SetNoFillComment     \SetKwIF{If}{ElseIf}{Else}{if}{:}{elif}{else:}{}%      \If{(SYNs from both hosts and \\             \Indp SYNs in earliest NFs of both hosts and \\             \Indp hosts' earliest packets differ)}{         Host with earliest NF is originator      }     \If{(SYN only from one host and \\         \Indp SYN is in connection's earliest NF)}{     Host is originator     }     \If{one host uses port 20 (ftp-data)}{     Host is originator     }     \If{only one host uses a well-known port}{     Host is responder     }     \If{start of hosts' first packets differ}{     Host with earliest NF is originator     }     Arbitrarily choose originator     \caption{Pseudo code for determining connection server side}     \label{algo:serverside2} \end{algorithm}   For instance, the line "SYNs in earliest NFs of both hosts and" is indented correctly, but "hosts' earliest packets differ" is not.


How to find Chrome extensions that inject ads into any webpage I browse?

I use the Google Chrome browser. Recently I noticed random ads showing up - either on the page content, or by redirection - when I click on a link an ad page opens instead of the proper page.   I suspect these ads are injected by a chrome extension, but how can I find the offending one?  The ads seem to appear at random in an intermittent manner.


Suppose that gcd($a,p$) = gcd($b,p$) = 1, and neither of the congruences $x^2 ...

Suppose that gcd($a,p$) = gcd($b,p$) = 1, and neither of the congruences $x^2 \equiv a$ mod $p$ or $x^2 \equiv b$ mod $p$ has a solution. Show that $x^2 \equiv ab$ mod $p$ does have a solution.    Having a tough time with this problem, went to my professor for some advice and he hinted at utilizing quadratic reciprocity and Lengendre symbol. I understand the formula for quadratic reciprocity but don't understand how this ties in with Legendre and helps solve this problem. Any help is greatly appreciated, thank you in advance.


ubuntu server not resolving LAN hostnames

Bit stuck here.  I have 2 machines that cannot resolve LAN hostsnames, unless there are specific entries in /etc/hosts  But other machines on the LAN can resolves hostnames.   My LAN:    1 x Cisco router runnning DD-WRT v24-sp2 with DNSMasq enabled. I've configured this with the hostnames and IPs on my LAN. 1 x Kubuntu 12.10 (resolves all hostnames correctly as long as they are entered into DNSMasq on the router) 2 x NAS (also resolve all names correctly) 1 x Ubuntu Server 12.04 (this does NOT resolve local hostnames unless they are entered into /etc/hosts) 1 x XBMCLive (Dharma) (same - does not resolve unless entries are in /etc/hosts)    How do I get the last 2 to use the DNSMasq entries on the router? Each machine is set to use the router as a nameserver, and all units resolve external addresses correctly.  Thanks.  some more info:  whilst on server, if I ping another PC (wstation)  $ ping wstation PING wstation.local.domain (x.x.x.x)    If I then append .local  $ ping wstation.local PING wstation.local.local.domain (x.x.x.x)   and directly  $ ping 10.0.0.4 PING 10.0.0.4 (10.0.0.4) 56(84) bytes of data. 64 bytes from 10.0.0.4: icmp_req=1 ttl=64 time=0.387 ms 64 bytes from 10.0.0.4: icmp_req=2 ttl=64 time=0.316 ms 64 bytes from 10.0.0.4: icmp_req=3 ttl=64 time=0.312 ms 64 bytes from 10.0.0.4: icmp_req=4 ttl=64 time=0.280 ms 64 bytes from 10.0.0.4: icmp_req=5 ttl=64 time=0.322 ms ^C --- 10.0.0.4 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 3998ms rtt min/avg/max/mdev = 0.280/0.323/0.387/0.038 ms


How can I import matrix data (2d function) from matlab into pgfplots?

This question arised in , but since it is of general interest, I add a separate question and my answer here.  Suppose you have a matlab figure which needs to be converted to pgfplots. The matlab figure contains a 2d function f(x,y) which is typically visualized as a matrix.  Suppose it is given as  [X,Y] = meshgrid( linspace(-1,1,3), linspace(4,5,5) ); Z = X + Y; surf(X,Y,Z) shading interp   such that  octave:7> Z Z =     3.0000   4.0000   5.0000    3.2500   4.2500   5.2500    3.5000   4.5000   5.5000    3.7500   4.7500   5.7500    4.0000   5.0000   6.0000   and the outcome is    I would like to reproduce that in pgfplots. To this end, I saved the Z matrix as ascii and imported it into an \addplot3 table statement:  \documentclass{standalone}  \usepackage{pgfplots}  \pgfplotsset{compat=1.9}   \begin{document}  \begin{tikzpicture}     \begin{axis}     \addplot3[surf] table {   3.0000   4.0000   5.0000    3.2500   4.2500   5.2500    3.5000   4.5000   5.5000    3.7500   4.7500   5.7500    4.0000   5.0000   6.0000      };     \end{axis} \end{tikzpicture} \end{document}   which leads to the unexpected result    How can I reproduce my intented surface plot?


Blender takes high RAM when use high resolution texture

My blender file contains cubes, and texture, texture size is quite small ~5MB, but they have high resolution : 10.000 x 10.000  Here is RAM usage before I open blender file   And here is after open   Is that a bug ?


How come a photon acts like it has mass in a superconducting field?

I've heard the Higgs mechanism explained as analogous to the reason that a photon acts like it has mass in a superconducting field. However, that's not too helpful if I don't understand the latter. Why does this occur, and how?


"Always use this program" is greyed out for certain files

Here is the context :  The problem started when some file icons didn't diplayed. So I search the web and most answers, if not all, were related to the icon cache database. I tried most solutions and they didn't work. Even the icon cache database is rebuilded each time.   I notice this problem was for all accounts. So it was not related to my account. This problem is for certain applications like all Office apps, Adobe Acrobat, etc. All major softwares.   I tried to change an icon associated to a filetype manually and this is when I noticed that I could not change the default program for the tested filetype. This is true for all filetypes where the icons were missing.  Also when launching some files, the app starts and popups an error message, but only on some files.  TL;DR;   Missing icons "Always use this program greyed out" for what seem "officially" registered apps and for all accounts   Some might find this question related to , but there are not the same.  So this is driving me nut!  Update 1  This seems to affect the softwares that are installed for all users, not the one installed for the current user. Apps such as Chrome is not affected neither is Firefox, because I chose to install them in my session only.


What is my relationship to a cousin who's 5th Great Grandparents are my 12th Great Grandparents?

This person I am referring to is Martha Wayles who was born in 1748 and died in 1782. I've been trying to wrap my brain around the x cousin x times removed thing but it is still confusing me.   The red circle is me. The pink circle is the cousin in question. And the blue one is one I'd like to know how we are connected as well.


Shorthand for a multivolume collection in authoryear-comp

I am trying to use shorthand with a @mvcollection in the authoryear-comp style and this is what I was expecting when using the \textcite command:     CAO (no. 1234)   However, what is generated is this:     Wilhelm et al. (CAO, no. 1234)   The plain \cite command, on the other hand, generates the citation as expected:     CAO, no. 1234   The @mvcollection in this case is a 5-volume edition of medieval German charters and deeds which are ordered by number; I have each volume on file separately again. However, I was trying here to refer to an entry in the collection as a whole, since the enumeration of the individual records does not restart with each volume. What I don't understand is why year is replaced with shorthand instead of editor and year together when using \textcite.    MWE:  \documentclass{article}  \usepackage[     style=authoryear-comp,     backend=biber,     safeinputenc, ]{biblatex}  \begin{filecontents*}{\jobname.bib} @mvcollection{CAO,     editor = {Friedrich Wilhelm and Richard Newald and Helmut {de Boor} and Diether Haacke and Bettina Kirschstein},     gender = {pp},     title = {{Corpus der altdeutschen Originalurkunden bis zum Jahr 1300}},     shorthand = {CAO},     sortkey = {CAO0},     volumes = {5},     publisher = {Moritz Schauenburg and Erich Schmidt},     location = {Lahr and Berlin},     year = {1932--2004},     pagination = {number}, } \end{filecontents*} \addbibresource{\jobname.bib}  \begin{document} \textcite[1234]{CAO} \end{document}


How do I remove permission from an app that I gave Google OAuth access to?

I gave Google OAuth access to this app that wanted to read Google Analytics API info.   No problem, but now I want to take away that app's permission to read my data.  Where does Google hide these authorized apps so I can remove it?


Why doesn't C++ have a pointer to member function type?

I could be totally wrong here, but as I understand it, C++ doesn't really have a native "pointer to member function" type.  I know you can do tricks with Boost and mem_fun etc. But why did the designers of C++ decide not to have a 64-bit pointer containing a pointer to the function and a pointer to the object, for example?  What I mean specifically is a pointer to a member function of a particular object of unknown type.  I.E. something you can use for a callback.  This would be a type which contains two values. The first value being a pointer to the function, and the second value being a pointer to the specific instance of the object.  What I do not mean is a pointer to a general member function of a class. E.G.  int (Fred::*)(char,float)   It would have been so useful and made my life easier.  Hugo


Why aren't the rules for minimum research effort being enforced consistently?

Recently, a guideline to demonstrate a "minimal understanding of the problem being solved" was made mandatory on Stack Overflow:  "Questions must demonstrate a minimal understanding of the problem being solved. Tell us what you've tried to do, why it didn't work, and how it should work. See also: Stack Overflow question checklist."  Despite this rule, I've found many popular questions that have remained open, even though they don't demonstrate an attempt to solve a problem before asking for its solution:                   When posting questions, I sometimes follow the example that has been set by these favorably-reviewed (but not well-researched) questions, based on the assumption that it is acceptable to ask questions like these under some circumstances. Is it now forbidden to ask questions similar to these, despite the almost entirely favorable reviews that these questions have earned?


How would Starkiller Base function in the long term if it took entire Suns to charge up?

Starkiller Base was made out of a Planet with it's super weapon being powered by draining the nearby sun.  But how would it work for the long term? could the planet actually move? if so how and what was the energy source for this?


Problem with installing Steam on Ubuntu 15.04+

Actually I have installed the new Ubuntu 15.04 64bit, and when I'm trying to install Steam on it, there is a problem. In fact I have downloaded the deb package from steam website, installed it and when I start it nothing happens. I tried to start it from terminal and what I've got  $ steam Running Steam on ubuntu 15.04 64-bit STEAM_RUNTIME is enabled automatically Installing breakpad exception handler for appid(steam)/version(0_client) libGL error: unable to load driver: r600_dri.so libGL error: driver pointer missing libGL error: failed to load driver: r600 libGL error: unable to load driver: swrast_dri.so libGL error: failed to load driver: swrast


No option to switch between X11 and Wayland on Ubuntu 17.10

The way you're supposed to switch between them is using the cog icon on the login screen, but this is what I see:    Why do I only have Xorg and why are there two of them? How can I switch to Wayland?


After collecting a sample my data is positively skewed, what does this show? I have collected data on the price of books and I have found my data to be positive skewed however I am not sure what this actually shows.


I seems to be an paradox when working with energy. If a person going 20 m/s to 40 m/s the kinetical energy gain is (40^2-20^2)/2= 600 J. Now imagine that i goinng in the opposite diraction with speed 10 m/s. Now the kinetical energy gain of the person is (50^2-30^2)/2=800 J. I see this as an Paradox? Maybe not, just an effect of two different moving reference frame...


How can I find the way back to the runway?

Kerbal Space Program doesn't seem to have an option to plant flags in EVA anymore.  How can I find my way back to the runway I launched a Space Plane from without using a mod?


Find the limit $\lim_{n\to \infty}\{{n!}^{1/n}\}/n$

Find the limit $$\lim_{n\to \infty}\{{(n!)}^{1/n}\}/n$$  I took exp log but getting answer as 1 but it should be 1/e. Required a nice approach.


undefined reference to static generic method

I'm trying to create a sameElements function, and i'm doing it this way:  util.h  #ifndef UTIL_H_INCLUDED #define UTIL_H_INCLUDED  #include <vector>  class Util { public:   template<typename T>   static bool sameElements(const std::vector<T> t1,const std::vector<T> t2); private: };  #endif     util.cpp  #include "util.h"  template<typename T> bool Util::sameElements(const std::vector<T> t1,const std::vector<T> t2) {   return false; // Changed the actual logic to focus in the real problem }   So, i am calling this method as follows from main.cpp  #include "util.h"  using namespace std;  int main() {     std::vector<int> v1 = {1,2,3,4};     std::vector<int> v2 = {1,2,4,3};     std::cout << "sameElements(v1, v2): " << (Util::sameElements(v1, v2)) << std::endl;      return 0; }   I expect to print "0" (false) but i'm getting this exception instead:  jscherman@jscherman:~/Workspace/cproject/src$ g++ main.cpp  util.cpp --std=c++11 && ./a.out main.cpp:(.text+0x55d): undefined reference to `bool Util::sameElements<int>(std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)' collect2: error: ld returned 1 exit status   Any idea what's going on?


Can you still track it's location after it has been wiped/erased?

Can anyone clarify the process when a phone is wiped?  Let's assume that my phone gets stolen, and the thief being unable to unlock it chooses to wipe the device via a system restore in iTunes.  Since the phone is (was) logged into my iCloud account, the thief will be unable to activate it, which should make it worthless to sell, right?  So, assuming a stolen phone gets restored, during subsequent setup it requires a WIFI connection prior to then logging in to the iCloud account it is locked to, so it should be contactable.  At this point, will the phone be still trackable by my icloud account using find my iphone service after being restored, even though it is not technically logged into any iCloud account? Will the custom message still be displayed to whoever has the phone?


Can you cast Thunderwave and then Misty Step on the same turn in that order?

Imra the wizard is cornered! Surrounded by multiple foes, she casts Thunderwave in an attempt to push her enemies back. One of them succeeds on the saving throw! Knowing that moving out of their range might trigger an attack of opportunity, can she cast Misty Step in the same turn? I'm asking this because the rules under Casting a Spell states that  A spell cast with a Bonus Action is especially swift. You must use a Bonus Action on Your Turn to cast the spell, provided that you haven’t already taken a Bonus Action this turn. You can’t cast another spell during the same turn, except for a cantrip with a Casting Time of 1 action.  Does the order of spells casted matter? The wording makes it seem like you can't cast a Bonus Action spell and then an Action spell, but you can do it the other way around.


Determine the convergence of $\sum\limits_{k=1}^{\infty}\sqrt k - 2\sqrt {k + 1} + \sqrt {k + 2} $

I'm having trouble determining the convergence of the series: $$ \sum_{k=1}^{\infty}\sqrt k - 2\sqrt {k + 1} + \sqrt {k + 2}  $$  I am thinking it doesn't converge and since neither the root test or $$|\frac{a_{k+1}}{a_{k}}|$$ seemed to work for me I would have to use a comparing test  Keep in mind I am not allowed to actually calculate what it converges to.


Background picture does not appear in the render?

I'm using Blender 2.74 and have added a picture as a background in the view , it is visible in the view but it doesn't appear in the render ,why is that ? here is the picture    Many thanks, Meri


Install Oracle java 7 along with Openjdk 1.8 in ubuntu 18.04

I have openjdk version "1.8.0_191" in my system. I need Oracle Java 7 for my project. I tried to install with following commands  sudo add-apt-repository ppa:webupd8team/java   sudo apt-get update sudo apt-get install oracle-java8-installer   But it is throwing the below error  Reading package lists... Done Building dependency tree        Reading state information... Done Package oracle-java7-installer 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 'oracle-java7-installer' has no installation candidate    How to install the both version in my system? Thanks in Advance.


As GET has so many meanings, it is hard for me to distinct between them and understand the nuances. Are these sentences all correct? Would you understand the same thing by them?     I will settle you in.   I will get you settled in.   Let's get you settled in!   Is the first one acceptable?


Can someone make an example to show that the product of two elements of finite order In a non-abelian group is not necessarily of finite order.  My goal of asking this question, is introducing a nice counterexample from matrix space and I know there are so many example about this question. thanks for referencing of these examples.


Pokemon go, all progress lost, no sign in option

I got signed out of Pokemon go and when I logged back on it had a whole new account, Ive realised Its not actually giving me the option to sign in, only sign up? Does anyone know how I can get the option to sign in back? I've tried deleting the app and redownloading it, turning the phone off etc, I can't work it out! I have it on iPhone with all the latest updates working   Thanks in advance


Is there a command line one-liner to move all the contents of all the direct subfolders of a folder to the folder itself and deleting the subfolders (which are now empty)? I.e., eliminate a level in the folder hierarchy?  To be absolutely clear, the deeper subfolder structure should be preserved.  I've run into this a couple of times now, and I was a little disappointed this doesn't seem to be a feature of Dolphin, nor something other people are struggling with.  I suspect this may have to be split in two, moving the contents of the subfolders, and deleting the subfolders. However, this may have the undesired side-effect of deleting empty second-level sub-folders.


Teaching one student who is very good and another who is bad was a learning experience. Teaching a student who is very good and the other who is bad was a learning experience.  One side of the coordinating conjunction uses "one student", the other side only uses "another." The parallelism of this usage depends on whether the term "student" carries over from first clause of "and" to the second clause that begins with "another" making it "another student." does it need to be "another/other student?" Cite the rule for why or why not.


What does the following question(bold) mean?

Are ‘free’ social networking sites user-owned, or are they spaces through which the forces of big capital are further extending into our everyday lives?


Using R plot in Latex output - not finding saved .png

I am trying to create a plot in R and use knitr and latex to print that plot to a pdf. I think I am taking the correct steps: 1. save plot as .png in same folder as .tex file 2. write this into the latex file as includegraphics 3. run the knitr  However, the program is not recognizing/finding my recently created plot .png even though I checked that it is there in explorer.    This is my code in R to create the .png that seems to successfully create the .png file in my working directory (which is also where the .tex file is):  png("hab_pie.png", height=400, width=400) bp <- ggplot(aoi_HabTerr2, aes(x="", y=acres, fill=habitat)) + geom_bar(width=1, stat="identity") bp + coord_polar("y", start=0) dev.off()   This is the relevant code that is in my .Rnw document:  \documentclass{article} \usepackage{graphicx} \usepackage{geometry} \usepackage{fancyhdr}     %for headers,footers \usepackage{underscore}  %needed if any text has underscores \usepackage[utf8]{inputenc}  \usepackage[singlelinecheck=false]{caption}  \geometry{letterpaper, top=0.45in, bottom=0.75in, left=0.75in, right=0.75in}  \begin{document}  \includegraphics[width=\linewidth]{hab_pie}  \end{document}   I am getting this error:  LaTeX Error: File `hab_pie' not found.   And when I look in the folder, the file is present under the same name:


How do I gradually go from one material to another?

I am trying to put lips on my character, but as you can see, there is an abrupt line between the lip material and the skin material. It looks super fake. How do I smoothen out the transition between kips and skin? I'm using cycles.


How do I change UV mapping without destroying the look of the model?

Normally, if I want to change the type of UV mapping means that I will destroy the look of the model as the mapping no longer corresponds with the image.  Is there a way to change UV mapping and have Blender recalculate what was painted where on the model to reflect the new mapping?


I've always appreciated the "main" link in the MSO header, just as I appreciate the "meta" link in the SO header, as I frequently go back and forth between the two.  I just wanted to confirm that there are currently no plans to bring a "main" link back and no alternative in the current design to the tedious "click, search the drop down, navigate to the MSO link, click again" process that's now in place to navigate back.  (That's four physical/mental operations vs. one).  Along the same line, should I expect the "meta" link to go away from SO when it migrates to the new design?  Update: See in particular this  to the close-as-dup question reference.


Real-life example in which Markov chain Monte Carlo is desirable?

A typical introduction to the Metropolis--Hastings algorithm, and hence to Markov chain Monte Carlo techniques in general, starts with the following assumptions on some probability distribution $P(x)$ which we'd like to sample from.  We are perfectly able to evaluate $P(x)$, or perhaps more accurately some multiple $C \cdot P(x)$ for some fixed $C$, though I don't quite see why you wouldn't just normalise and put $C = 1$. However, it is very hard to sample from $P(x)$; so hard, that we'd rather sample from some other distribution thousands of times for the sake of getting a sample of $P(x)$ via Markov chain methods.  I'd like to see an actual, real-life example in which such a scenario comes up. How can it be easy to evaluate $P(x)$ but hard to sample from it? I'd be interested in seeing a real-life situation involving say weather, diseases, neurons, air flow, whatever it is, that leads to a situation in which MCMC methods are a natural thing to ask for.


Can you perform a reaction to somebody else's reaction?

Imagine Wizard A tries to cast fireball. Wizard B casts  as a reaction to try to nullify said fireball.    Can Wizard C cast counterspell as a reaction to nullify Wizard B's counterspell? Can you have a group of Wizards of an indefinite population counterspelling each other ad nauseam?


Will portable air con cool as well as temperature increases?

I have a portable air conditioner, it's currently reducing my room from 23-24C to 17-18C. 24C is not exactly hot and the main purpose of the unit is for when it does get hotter. I could expect my room to reach 30C. Will the AC be able to reach it's target of say 18C under 30C conditions? Will it take a longer time to reach it?


Dealing with ArcSDE connection limit exceeded?

We routinely exceed ArcSDE's connection limit, about once a week. Many of the "connections" are nothing but orphaned records in the SDE.PROCESS_INFORMATION table. Is there any way to clean up these connections periodically? I just service packed ArcSDE to 9.3.1 SP2, hoping this would resolve the problem. (It did not.) Currently I restart the arcsde service to clean up the connections, a pretty inelegant solution.  This is the error, by the way:  Failed to connect to database. Maximum number of connections to instance exceeded  My workaround:  My solution was simple: restart the SDE service weekly, and double the number of allowed connections. This is of course not a solution; shame on ESRI for shipping enterprise software that requires such a workaround. After all, it's still possible to exceed the maximum connections; I can only hope that our current level of use doesn't lead to this.  I altered the init.d script to prevent sdemon from prompting the user to confirm they want to stop the service (this is what the -N argument does). I added a restart option as well.  #!/bin/bash # # arcsde Init file for starting and stopping ArcSDE 9.3 # # chkconfig: 35 90 40 # description: ArcSDE startup script  # Source function library.  . /etc/rc.d/init.d/functions  SDE_OWNER="sde" SDEHOME="/home/sde/sdeexe93"  case "$1" in start) echo -n $"Starting ArcSDE:" su - $SDE_OWNER -c "$SDEHOME/bin/sdemon -o start -p pwd" echo "OK" ;; stop) echo -n $"Stopping ArcSDE:" su - $SDE_OWNER -c "$SDEHOME/bin/sdemon -o shutdown -p pwd -N" echo "OK" ;; restart) cd "$CWD" $0 stop sleep 5 $0 start ;; *) echo $"Usage: $0 {start|stop|restart}" esac   Then I created a cron job to restart the service once weekly:  # restart arcsde once weekly at 5am Saturdays 0 5 * * 6 service arcsde restart   I also increased the maximum number of allowed connections from 64 to 128 by editing the $SDEHOME/etc/giomgr.defs file:  CONNECTIONS      128     # maximum number of connections                          # NOTE:  On windows machines, you may need to                          # increase server non-interactive desktop memory.                          # Consult the ESRI support site for more information.   Then I imported the new settings:  $ sdeconfig -o import -f $SDEHOME/etc/giomgr.defs -i esri_sde -u sde   That was it. We'll see how it goes.


Let $f : [0, 1] \to \Bbb{R}$ be a continuous function such that $f(x^2) = f(x)$ for all $x \in[0, 1]$.   Which one of the following is not true in general?   A) $f$ is constant  B) $f$ is uniformly continuous   C) $f$ is differentiable   D) $f(x) \ge 0 \forall x \in[0, 1]$   If I take $f(x) = -C$ ($C$ is positive constant) then clearly it shows that option D is not true in general.    But I want some theoretical approach to this question if there is any.  Like is there anything special about the functions satisfying $f(x^2) = f(x)$?


Why does my path not get saved even after editing ~/.bashrc?

I've added maven to my path, but it doesn't seem to be persisting to the path beyond the lifetime of the terminal application.  I've modified my ~/.bashrc, but it still isn't storing the modified path.   Here is my ~/.bashrc:  export JAVA_HOME=`/usr/libexec/java_home -v 1.7` export PATH=$PATH:/Users/chris/Dev/Libraries/apache-maven-3.1.1/bin   And here is the result of echo $PATH:  chriss-macbook:~ chris$ echo $PATH /usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin   Why isn't my modified path getting persisted between terminal sessions, and how can I solve that?


How to catch exception of  block for Android activity?

public class MainActivity extends FragmentActivity {     TextView textView = (TextView) findViewById(R.id.textbox);      //rest of code.........   Above code generates the following exception,      Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.Window.findViewById(int)' on a null object reference     at android.app.Activity.findViewById(Activity.java:2090)     at com.example.kuldeep.myapplication.MainActivity.<init> (MainActivity.java:24)   When I debugged this, I come to know that this code is executed even before the onCreate() method.  How is this possible? and How to catch this type of exceptions?


Posting 3 images using Stack Exchange's mobile app will result in the image order being destroyed

I have run into this bug several times now and I can replicate it easily across all devices. If I post 3 images using the image tool on any of the mobile app platforms, the first tag always changes what image it is supposed to display. Since that's hard to explain, I took 3 random images and attached them to this question. Then, took a screenshot of before.         Hit preview... And chaos erupts. The first image always changes to a different number than it should be.        I've replicated this on both Android and iOS.


How to determine the value of a domain name?

I'd like to register a second-level domain with the .com extension and I noticed that it has already been registered and the owner put it for sale and let the possibility to make an offer in their site or by contacting them.  I saw that domains are generally sold for extremely different prices, so I'm confused.  Are there any general criteria to decide how much I should offer to purchase a domain?


What are some books that teach to apply Lagrangian methods on simple systems of Physics I?

I want to find a book that teaches simple Kinematics problems but use both Newtonian and Analytical method, and maybe draw parallel between them. Is there such a reference?


"Doing such stunts ARE punishable" or "Doing such stunts IS punishable"?

Doing such stunts are punishable.    Doing such stunts is punishable.       Should it be is or are?   There is a conflict. Stunts are punishable sounds right. However, I think whether  is or are should be used will not depend on a plural or singular form of the noun stunts here. It depends on something else.  Why do we need singular or plural verb agreement here?


Which is the grammatically correct statement :  "We are travelling in a car"  Or  "We are travelling by a car"


Example in which light takes the path of maximum optical length

According to the modern version of Fermat's principle,"A light ray in going from point A to point B must traverse an optical path length that is stationary with respect to variations of that path.".Is a maximum optical path length possible ?What if we keep adding deviations to the optical path length?


On the proof $\tan 70°-\tan 20° -2 \tan 40°=4\tan 10°$

I am currently studying in class 10 and I am unable to do this problem. $$\tan 70 ° -\tan 20° -2 \tan 40° =4\tan 10°$$ Can anybody please help me.  Thanks!


In Python, is there a concise way of comparing whether the contents of two text files are the same?

I don't care what the differences are.  I just want to know whether the contents are different.


How do I make Thunderbird open links in Chromium?

I want to be able to click links in Thunderbird emails and have them open in Chromium (package name chromium-browser). Instead, they open in Firefox.  I have tried the following:   xfce preferred applications (Chromium is not listed, so I had to hunt down the executable) -- next time I run chromium, it complains that it is no longer the default browser. Telling Chromium to set itself as the default browser. Thunderbird opens links in Firefox. update-alternatives. It's already listed as an alternative at the same priority as Firefox. The "open web browser" app menu item opens Chromium. Thunderbird opens links in Firefox.   I have looked through the entire preferences gui in Thunderbird (but not the advanced config editor yet) and seen nothing that mentions what browser to open links in.  Please note that this is not Google Chrome.


I have a method that uses the  function and makes a call to another method. On initial load method 2 works fine. However, after the timeout, I get an error that says method2 is undefined. What am I doing wrong here?  ex:  test.prototype.method = function() {     //method2 returns image based on the id passed     this.method2('useSomeElement').src = "http://www.some.url";     timeDelay = window.setTimeout(this.method, 5000); };  test.prototype.method2 = function(name) {     for (var i = 0; i < document.images.length; i++) {         if (document.images[i].id.indexOf(name) > 1) {             return document.images[i];         }     } };


Fixing a server that has been listed an Email Spam

Full Disclosure: Setup of email servers is something fairly new to me, so go easy on me :)  Recently users reported that they were not receiving emails from my site. The site runs a vbulletin forum so the emails are things like subscription notifications etc.  After doing a little digging I have found two issues, that I am not certain how to fix:  Issue #1 According to this:    The SMTP banner check fails as "Reverse DNS does not match SMTP Banner".  As I understand it some mail server will rDNS check the sender and reject if there is not match. However, I have no idea how to resolve this.  Issue #2 Checking /var/log/maillog I am seeing quite a few entries that a similar to this:     Sep  3 03:39:00 mail postfix/smtp[48940]: 53D9554E2C: host   mx.mnd.ukmail.iss.as9143.net[212.54.58.11] refused to talk to me: 550   mx6.mnd.ukmail.iss.as9143.net mx6.mnd.ukmail.iss.as9143.net   logid=SMTPRC 550 MXIN102 Your IP 77.68.13.98 is in RBL. Please see       ;id=wfhofcY9kJpgl;sid=wfhofcY9kJpgl;mta=mx6.mnd;d=20180903;t=053912[CET];ipsrc=77.68.13.98;   From this it seems that the server IP has been blacklisted, following the spamhaus link in the maillog entry led me to:    This gave me the option to remove the listing  So, my somewhat vague and inexperienced question is what do I need to do to fix this?


Why wont Minecraft let me break blocks or use my inventory

I've been playing Minecraft for about a month. I got on one day and it wouldn't let me break blocks or use my inventory. I'm playing on the mod pack "Yogbox" and I'm on survival with no cheats.


What is the longest word you can come up with that the letters are all in alphabetical order?

It's Friday again, how about some fun to get us into the weekend?  What is the longest word you can come up with for which all the letters in that word are in alphabetical order?   Rules:   English words only    Can't be a name of a place, person or other proper noun.   if it contains the same letter twice in a row, that does not disqualify it.   No fair looking it up on Google!   Update: One more rule to help you guys out.   The word can be in either ascending or descending alphabetical order.


Best practice when analysing pre-post treatment-control designs

Imagine the following common design:   100 participants are randomly allocated to either a treatment or a control group the dependent variable is numeric and measured pre- and post- treatment   Three obvious options for analysing such data are:   Test the group by time interaction effect in mixed ANOVA Do an ANCOVA with condition as the IV and the pre- measure as the covariate and post measure as the DV Do a t-test with condition as the IV and pre-post change scores as the DV   Question:    What is the best way to analyse such data?  Are there reasons to prefer one approach over another?


What is the sequence of events during the denouement?

In 's denouement, as Oldman (Rush) begins to understand exactly what has happened, there is a series of events involving him going to a restaurant in Prague, moving into a new room furnished to his specifications, finding a tracker in the boot of his car, and eventually him in an asylum. What is the exact sequence of these events? What is their significance?


I have 13.04 and I am trying to upgrade by cd to 14.04, because my update manager always says it cant find updates, but the option for upgrading is grey. what do I do?


unknown network interface called "enx9cebe80718e1"

Answered in post below  I have a network interface I don't recognize or understand.   ip a s provides the following (sanitized) output:  1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 scope host lo        valid_lft forever preferred_lft forever     inet6 ::1/128 scope host         valid_lft forever preferred_lft forever 2: wlp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000     link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff     inet 192.xxx.xx.xxx/xx brd 192.xxx.xx. scope global dynamic noprefixroute wlp2s0        valid_lft 2347sec preferred_lft 2347sec     inet6 xxxx::xxxx:xxxx:xxxx:xxxx/xx scope link noprefixroute         valid_lft forever preferred_lft forever 4: enx9cebe80718e1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000     link/ether xx:xx:xx:xx:xx:x brd ff:ff:ff:ff:ff:ff   The relevant output from ifconfig (which I installed for familiarity) is:  enx9cebe80718e1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500         ether xx:xx:xx:xx:xx:xx  txqueuelen 1000  (Ethernet)         RX packets 138  bytes 30067 (30.0 KB)         RX errors 0  dropped 0  overruns 0  frame 0         TX packets 573  bytes 98070 (98.0 KB)         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0   Traffic is happening, but small.  My understanding of networks is next to nothing, but nevertheless, all the interfaces I have seen are short, e.g. wlp2s0.  My question is, what is enx9cebe80718e1? And where is the entry for 3:?  system and background:   Lubuntu 18.04 (recent reinstallation due to confirmed hack) on a Dell XPS13 L321x.  Internet connection via a) Android phone's hotspot (now), b) wireless 4G dongle (last fornight) wireguard is usually on, but was not for the info provided in this post rkhunter a short time ago gave clean    bill of health, but I don't update that regularly. ufw is enabled. (So too is fail2ban)


Synaptic Clickpad not working while typing on windows 10

In 2015 I bought an HP Pavilion (if specs are needed I will put them as an edit), and ever since I got it home, I can't move the mouse pointer using the touch pad (ClickPad - whole pad is a button) while gaming or just after typing.  I have searched everywhere.   dose not work because my PC settings don't look the same as they explain.  The pics half way down in  don't look the same as on my PC.  I have looked all over the internet also on Windows and HP's own forums and sites.  Pics of the options i have on my PC:   Hope some of you guys can help me!


How can I tell what RAM will fit my computer HAVING 32 BIT OS?

I want to replace the RAM within my computer to 4GB, it currently has 256mb of memory.  My question is what RAM is compatible with my motherboard?


List of recently awarded badges has no correct spacing

When visiting  (at this time) the list of badges awarded recently is display with no spacing between them, which I think is incorrect since it doesn't follow the overall site style:


Why the opposite of "it's open" is "it's closed" rather than "it's close"?  Why there is not consistency in using this passive voice "ed" also for open, (i.g. opened) or alternatively saying "it is close" without that additional "ed"?   In other words I would expect to have "open and close" or "opened and closed", but it is not consistent.   Dictionary:  , , .


Download point files from Census On the Map in R

I'd like to automate downloading point shapefile data from . There is a link which can be used to download the data, as provided below:    Is it possible to directly download this within R?  Other Comments:   I don't want Decennial Census, or ACS (or else I'd use totalcensus or tidycensus).  I already have the  (CSV).  Whilst this question is about using Census On the Map, is there an R package to do so?


efibootmanager -o changes are lost on reboot

Trying to install ubuntu on a laptop. The "bios/uefi" has no uefi boot options & the windows boot manager just kicks in. The only "option" is "boot from hard disk". So we tried to use efibootmgr to put grub to boot first.  When we run an efibootmgr -o xxxx,xxxx,xxxx command it seems like the order gets fixed but on reboot the windows boot manager still has control, then when we re-opened the live usb & checked the boot order it remains unaffected.  What are other ways to change the efi boot order? Maybe by mounting the efi partition (in mnt) and doing what?


Is there a nice way to classify the ideals of the ring of lower triangular matrices?

Suppose $T$ is the subset of $M_2(\mathbb{Z})$ of lower triangular matrices, those of form $\begin{pmatrix} a & 0 \\ b & c\end{pmatrix}$. So $T$ is a subring. Now I know that the ideals of $M_2(\mathbb{Z})$ are all of the form $M_2(I)$ for $I$ and ideal of $\mathbb{Z}$.   However, is there a nice way to describe all the ideals in $T$ specifically, or does it not behave quite as nicely?


Gravitational Time dilation for motion in a gravitational field

An astronaut is travelling towards a black hole in a space ship traveling at 0.8 C. The guy’s position is not fixed relative to the black hole. He is travelling towards it from a distance. How to calculate the gravitational time dilation in this case, as the "relative time" keeps getting slower as one approaches the event horizon?  Please note that I have already factored the ‘time dilation’ due to the space ship traveling at 0.8 C. I just want to understand the ‘gravitational time dilation ‘ part of it.  Can some form of integration be applied on the gravitational time dilation equation for the case of motion in gravitational field?


Can this congruence rule be generalized?

Let n be a positive integer which representation in base 10 is $a_ka_{k-1}a_{k-2}...a_2a_1a_0$. It's not particularly hard to prove that:  $n\equiv a_0\pmod2$  $n\equiv2a_1+a_0 \pmod 4$  $n\equiv 4a_2+2a_1+a_0\pmod8$  However this doesnt seem to hold for $\pmod{16}$, what I mean is:  $n\equiv 8a_3+4a_2+2a_1+a_0\pmod{16}$   For example if we take $n = 54217$  $54217\pmod{16} = 9\;\;$ and $8*4+4*2+2*1+7 \pmod{16} = 1$  Is there anything I can add to this rule to actually make the rule work for $2^m$?


if a complex function $f$ is real-differentiable, then $f$ or $\overline{f}$ are complex-differentiable

This is an exercise from Remmert's Theory of Complex functions.  Let $D\subset \mathbb{C}$ be a domain and $f:D\rightarrow \mathbb{C}$ a real-differentiable function. Assume that the following limit exists:  $ \mathrm{lim}_{h\rightarrow 0} \left|  \frac{f(c+h) - f(c)}{h}   \right|.$  Show that either $f$ or $\overline{f}$ is complex-differentiable.  I've tried showing that $\frac{\partial f}{\partial \overline{z}} = 0$ or $\frac{\partial \overline{f}}{\partial z} = 0$ by using the fact that there exist continuous functions $g$ and $h$ such that in $D$ one can write   $f(z) = f(c) + (z-c)g(z) + (\overline{z} - \overline{c})h(z)$   and that  $g(c)= f_{z}(c)$ and $h(c) = f_{\overline{z}}$ and then plugging this into the limit above. Does this approach works and I just can´t see how to do it? Can someone give a hint or a guideline solution to this?


I wanted to bring up an issue with the latest Ubuntu release that I hope can be solved. Although I will agree with the community that iOS 7 is not the most open platform release, it still is my desire to be able to grab Photos, Music, and Files off my Phone similar to what I would do to any other device.  Every time I connect my device to Ubuntu, I receive the following notification:  The device "Justin's iPhone" is locked. Enter the passcode on the device and click "Try again".   On my iPhone, I select the following   Unfortunately, this is where problems start to arise. It appears that Ubuntu either does not recognize the permissions from my iPhone or the iPhone is not allowing itself to truly be unlocked. As we can see the permissions are   Browsing askubuntu, I encountered the following   After running the code, I receive the following error:  justin@justin-CT15:~$ idevicepair unpair && idevicepair pairERROR: Device d1fea2c56e51199f901eb34020a1581ea31a2a50 is not paired with this host   If I call the command again, i receive another error:  justin@justin-CT15:~$ idevicepair pair ERROR: Could not pair with the device because a passcode is set. Please enter the passcode on the device and retry.   Ultimately, I am stuck to experiment with solutions that end up not working. I am troubled by the lack of information and support for the iOS 7 platform on Ubuntu's latest release. If anyone has a workable solution or experiment for a workaround, I am happy to try  Thanks for reading and have a wonderful day!


Where to put anchor tags in Angular CSR Applications such that URLs get indexed?

I built a site with Angular 10. When the home page is visited it reroutes to this /welcome. However There's no link to that from anywhere within the app, so I don't think Google has any way of indexing that page. What would be the best way of telling Google to index the page.  From my research it seems I could do something like this:    Welcome to Example!   <app-root></app-root>   What is the max number of links that this would work with and any other approaches?


dependency, sudo, and apt-get errors in Kubuntu

It's been awhile since I've used my Kubuntu system. I'm trying to upgrade to version 16.04 - and running into a series of problems:  When attempting to upgrade Kubuntu to version 16.04, I get the error message: Required depends is not installed The required dependency 'apt (>= 1.0.1ubuntu2.13)' is not installed.   So, when I attempt to fix that in the (Konsole) Terminal, I enter: sudo apt-get install --only-upgrade apt  The response that I get is: Command 'sudo' is available in '/usr/bin/sudo' The command could not be located because '/usr/bin' is not included in the PATH environment variable. sudo: command not found   I then try to fix that by entering: apt-get install sudo  The response that I get to this is: Command 'apt-get' is available in '/usr/bin/apt-get' The command could not be located because '/usr/bin' is not included in the PATH environment variable. apt-get: command not found   I tried to address that by entering: export PATH=/usr/bin:/bin sudo apt-get install --only-upgrade apt  In response, I get: E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?   In order to identify what might be causing the problem, I ran: ps aux | grep apt  The only thing that comes up that looks like it might be a possibility is this: 4381  0.0  0.0  11740   936 pts/2    S+   23:50   0:00 grep --color=auto apt    (All the other "apt"s it finds are part of "caption"...) At this point, where should I go? What should I try?


Must an uncountable subset of R have uncountably many accumulation points?

This question is taken from problem 4.1.8 of "Real Analysis and Foundations" by Krantz  The question reads:  "Let S be an uncountable subset of $\mathbb{R}$. Prove that S must have infinitely many accumulation points. Must it have uncountably many?"  The first part of the question took some work but ended up coming out pretty smoothly; however, I'm at a complete loss as to how to go about addressing the second problem. Intuitively, I think the answer is yes.  My first attempt was to try to show that a countable number of accumulation points allowed one to order the elements of S in such a way that they are countable (ie prove the contrapositive), but I did not manage to get much further than that.  My second attempt was to show that $S-{s_{1},s_{2}...}$ where $s_{1},s_{2},...$ are countably many accumulation points of S is uncountable and thus must have an accumulation point, so S has an accumulation point that is not one of the countably infinite set. Hence, the number of accumulation points is uncountable.   My question is, is this logic valid? I would have to prove that an uncountable set minus a countable set is uncountable, which shouldn't be too difficult.  Any hints/points in the right direction/outright answers are greatly appreciated.


When I hit F12 to render an image and zoom in it is quickly pixelated. How can I render a higher res display? I have looked through the settings and couldn't find a solution.


I am having problems with table placement

Hi I am sorry if this is a repeat, I tried to find a similar problem but I could not. I am making Cayley tables and I quite like the ease of the code I am using, but something strange keeps happening. I put the code in for the table, then write some words and then put the code for another table, but when I compile, both tables are above the words that were supposed to be in the middle.   example:  \begin{table}     \begin{tabular}{r|r|r|r|}     + & e & a & b\\     \hline     e & e & a & b\\     \hline     a & a & ? & ? \\     \hline     b & b & ? & ? \\     \hline     \end{tabular} \end{table}  words words words  \begin{table}     \begin{tabular}{r|r|r|r|}     + & e & a & b\\     \hline     e & e & a & b\\     \hline     a & a & ? & ? \\     \hline     b & b & ? & ? \\     \hline     \end{tabular} \end{table}  But when I compile the tables are on top and the "words words words" is under both tables.   Any help would be appreciated. This is my first post so I hope I did everything correctly.


I was trying to create a dual boot of Windows 8 and Ubuntu. I successfully installed Ubuntu on the hard disk but it wasn't able to boot so I went through boot-repair which said that I should put a certain file as EFI. I did that, restarted and only Acer logo appeared with nothing else. F2 didn't work, I couldn't get to BIOS any other way.  What I have tried:   Reseat the RAM Plug-in, plug-out hard drive Trying to plug only a bootable flash drive Trying to boot from CD Downloaded BIOS update from the acer website, but it only has a version from within Windows (which I can't access). Shorted JCMOS1 jumper for 20 seconds after which the ACER logo dissapeared and insted:   A black screen appears after I press the power key for about 5 seconds and then only a message "Press  to enter Setup." appears If I hold Fn+Esc and then power up, system info appears (Insyde H2O EFI 3.7, Copyright... System BIOS version: v2.13, Processor type etc) and the "Press  to enter Setup." on the bottom On pressing F2 the message "Press  to enter Setup." dissapears but nothing happens    Any other ideas are very welcome!  Thanks!


i have kubuntu and want to install windows 7 in a dual boot

Currently I have installed Kubuntu 14.04 native on a machine with 1TB of disk space.   Now  I have to use a program for work which is not working in Linux nor will it run in Windows inside of a VM.  Much to my regret I need to create a separate partition and install MS Windows (dual boot) just so I can run this program.  Or I will have to buy a separate Windows machine just to run this program (which I can not afford to do ) or switch this machine to a full windows only which I do not want to do.


How to modify the fields of user registration form and user login form?

I have user registration and user login form on same page and want to customize the field of both the forms?


Hi I am a complete newcomer to blender and am following this tutorial, where he says to alt+click to select an entire row or "edge loop". I have followed all instructions exactly up to this point (3 times to make sure!). Alt-click does nothing. Thank you for your help. p.s. If possible, please keep answers in simple layman's language. I see some similar posts about alt click and loop select but had trouble following since the explanations were too advanced. Thank you! Video starts where he demonstrates alt+click:


rm: cannot remove directory/: Permission denied

I made a directory called "shadi" and set this permission for it  sinoosh@ubuntu:/home$ ls -ld shadi drwxr-xrwx 2 root root 4096 Jul  1 01:58 shadi   In this situation I have "others" permissions, but why can I not delete it?  sinoosh@ubuntu:/home$ rm -r shadi/ rm: cannot remove ‘shadi/’: Permission denied


I'm in a discussion with Cybersecurity Team on the company that I work. I'm trying dealing to allow again this integration in our environment. The Cyber guys expose this  detail. I search on the web if this had been fixed, looked too in , but not found news about it. Someone know if this vulnerability it was fixed? PS: I'm using Ubuntu 20.04.2 LTS.


Ubuntu Software Center erratic behavior in Ubuntu 21.04

I just upgraded from Ubuntu 20.10 to Ubuntu 21.04. Presently there are two software centers on my system, as you can see here:  If I left-click on "Ubuntu Software", nothing happens: the application does not launch. If I right-click on "Ubuntu Software" and I select "Show details", the application launches, albeit showing a message "Sorry! There are no details for that application" (but at least it starts) The expected behaviour would be that, when I clic on the icon, the application starts... Any suggestions ? Thanks!


A PigeonHole principle (combinatorics)problem using Fibonacci numbers

Define the sequence of Fibonacci numbers as: $F_1$ = $F_2$ = 1 and $F_n$ = $F_{n−1}$ + $F_{n−2}$ for every n > 2. Prove that, for any positive integer $k$, there is a Fibonacci number ending with $k$ zeroes I am able to figure out that this problem is a application of PigeonHole Principle. I can't figure out how to approach it or what will be the reasoning. Can someone help me out? A little bit wordy and rigorous proof/hint is appreciable.


Why is the pressure on the inside of air flow curvature considered be low pressure and it is considered to be high pressure above?  I read and seen videos that this is the case but I want to know why.  Is it passed on the fact that usually a flow turn is caused by something and the pressure above is greater than that press below it?


Prove the formula for the sum of consecutive cubes


What camera & lens would be ideal for my situation?

First of all, I am an absolute beginner. Does not have much knowledge in photography. I was thinking to get an ILS camera for traveling due to the fact I heard from many different people, how good images it produces including blurred background etc. etc..   Here is what I think might be useful for me   Medium sized body some Zoom capabilities like the focal length of at least 100/200mm ish ( I prefer not to change lenses often) a touch screen would be very convenient Reason for going for the ILS is to keep the IQ better and an option to upgradeability in future (if I have enough cash to spend after buying the first system) Good video capability I can spend upto £1500 - £1800, but obviously would like to keep it to "best bang for the buck".   An example What I thought is Sony a6500 with 18-200mm or similar package. or Going for an all in one Bridge camera like FZ2500.  Now my question is if I stick to a single lens with a6500 in the long run, would I see any difference in IQ compared to FZ2500 or similar budget cameras? Would it be wise to choose an ILS over Point & shoot/ bridge camera?  Any suggestions/thoughts would be greatly appreciated. Thanks


What is the definition of "here" in "here you go?"

Here has two definitions:     In, at, or to this place or position:   'they have lived here most of their lives'   Used when indicating a time, point, or situation that has arrived or is happening:   'here we encounter the main problem'   So in the idiom "here you go" which definition is used? Is the present tense in this sentence used to signify future action like "my train leaves at seven" or something else?


Changing my administrator user's username has removed privileges, rebooting doesn't work

Like the title says, I was trying to change my username on my MacBook (running High Sierra Version 10.13.6), it removed my admin privileges so I do not have an Admin account.  I tried rebooting in command mode and deleting the applesetupdone file, but it says the file does not exist, and when I reboot does not allow me to set up a new admin account, following the steps below:  Boot into Single User Mode: Start/restart your Mac. As soon as you hear the startup tone, press and hold ⌘ + S until you see a black screen with white lettering. (If you end up back on the login screen after a flash of the black screen with white lettering, enter your password and it will return to the black screen.)  Mount the drive by typing /sbin/mount -uw / then ↩ enter.  Remove the Apple Setup Done file by typing rm /var/db/.AppleSetupDone then ↩ enter.  Reboot by typing reboot then ↩ enter.  Complete the setup process, creating a new admin account.  What else can I try or do from here? Googling isn't giving me any options if the above doesn't work.  Thank you!


Omission of "is" in "She thought the study of Latin a waste of time."

In The Elements of Style, the authors give this example:     She thought the study of Latin a waste of time.   I cannot understand why the verb is has been omitted. Should not this sentence be as:     She thought the study of Latin is a waste of time.


Does factory resetting a rooted phone unroot it? Does it vary by ROM - I'm on CyanogenMod 11 M7 Nexus 4, will it?


I have a button:     <div id="save-submit" class="save-submit">             Submit Code         </div>   When its clicked it checks for an input, if the input is correct i rename the button to continue:   $('.save-submit').click(function(e){   var button = document.getElementById("save-submit");                     button.className="next-task";                     button.innerHTML="Continue";                     button.id="next-task-id";    });   When the continue button is pressed it should load new tasks, but its going back to the save-submit aka trying to rename the button.   $('.next-task').on('click', function (e) {         e.preventDefault();         GetTask();  });   What am i doing wrong?  Thanks!


Unicode Replacement Character in Standard TeX

Is there a font, available to -all- TeX users, that includes a glyph that can be recognized as the Unicode Replacement Character?  I realize I can use XeTeX with a  (or maybe any character not in the font), but I'm interested in using standard pdfTeX with standard LaTeX 2e and a pure ASCII input file.  The glyph typically looks like a filled black diamond with a white question mark inside it:    If no such font is available, what's the best robust strategy for getting such a glyph into a standard pdfTeX document (one whose input file has no Unicode or non-ASCII UTF-8 byte sequences in it) without using XeTeX or similar?  Inserting TikZ commands?  Raw PostScript?  Right now, for lack of a better solution, I'm using a \textbullet, simply because it's the boldest/blackest glyph I can think of, and it's available in most standard fonts.  Creating a custom font with one glyph in it is not really viable, or if it is it's a strategy of last resort, unless (perhaps) it can be done automatically and on the fly when processing the document each time.  (Reposted from the texhax mailing list: ; originally posed by Doug McKenna)


What is a word that could be used both for an ancestor and a descendant at the same time (excluding siblings, cousins etc)?

For example, my parents, my parents' parents, my children, my children's children etc. Everybody in my family tree vertically.  I need specifically person, and "both" ancestors and descendants; not one or the other, and not both in general including side relationships such as siblings or cousins.


Abstract Algebra: Prove that A5 has no proper subgroups with order 15 or greater.

I have thought of this and looked at other answers but the answer is not clear. We have not learned about Sylow yet and also we have not learned about the kernel.  So far, I know that A5 has order 60 with subgroups of orders 1,2,3,4,5,6,10,12,15,20, and 30. So, I know it must be shown that 15, 20, and 30 are not proper subgroups.  I considered that these subgroups are cyclic but I'm not understanding how this relates to the proof.  Any help is appreciated.


I have intention to rent a Mustang in LA , but the thing is, insurances are so expensive and I do not want to be robbed by the renters.  Which insurances should I choose absolutely?


So I seem to be struggling a little bit with static in general. What exactly does static do in Java and how do you fix it? For example, here is a bit of code  public class StaticProblem {     static int number;     static int valOne, valTwo, valThree;      public static void main(String args)     {         // stuff          valOne = method1(number);         valThree = method2(val1, val2);     }      public static int method1(int parameter)     {         int var;         // stuff         return parameter + var;     }      public static int method2(int parm1, int parm2)      {         int othervar;         // more stuff          return parm1 + parm2 + othervar;     }      : }   How exactly would one go about fixing the "static" problem so that static is no longer used. I sort of understand that static in Java allows the value of one object to be shared with new objects that are created (for example, 15 cards all share the same gas left in the tank - if one car goes empty, then the rest go empty as well). I thought I knew how to fix this code and I assumed it involved making a new StaticProblem object in the main method. However, I am a bit lost.


ArcGIS ModelBuilder iterator reports only last input shapefile?

Using Arc 10.3.1, if I manually enter the names of multiple shapefiles (all from the same folder) into the Check Geometry tool, the (single) output table lists the errors that exist in all of the shapefiles.    That is, only one output table is created, even if multiple input shapefiles have errors.  For example, if two shapefiles have errors, both will be listed in the single output table. Here's a screen print of the input:    However, if I iterate those same shapefiles (using the Feature Classes option), the output table only lists the last shapefile that went through the iteration.  Here's a screenshot of the model:     I suspect that the iterator is running Check Geometry not once, but three times, with a single input shapefile going through each iteration, overwriting the previous output.    How do I get the iterator to list all of the shapefiles with errors, either in separate output tables or aggregated in a single output table?


The edit rejection message for "no improvement whatsoever" STILL sounds too hostile

Last year, after , the suggested edit rejection reason for "no improvement whatsoever" was changed — to replace "fails to make" with "does not make".  It now reads:  This edit does not make the post even a little bit easier to read, easier to find, more accurate or more accessible. Changes are either completely superfluous or actively harm readability.  This still seems unnecessarily harsh to me. Some alternatives:    This edit doesn't make the post easier to read, easier to find, more accurate or more accessible. Changes are either superfluous or harm readability.  (Took out "even a little bit", and "completely", as they unnecessarily put an emphasis on the magnitude of the edit's failing.)    This edit doesn't make the post easier to read, easier to find, more accurate or more accessible.  (Removed the second sentence because it just repeats what the first sentence says.)


What is the etymology of saying "when" to stop pouring or serving?

I was wondering: What is the origin of asking someone to say "when" (to mean "enough") while they are serving food or beverages?


I have studied that we can create threads in two ways in java :   By extending Thread Class  By implementing Runnable interface under which we have to implement run()     Now my question is what is the difference b/w the two?  Is any 1 faster or efficient than other? something related to binding here or linking?


An algorithm to find L th min/max from length K subarray

Consider an array of values {3,2,8,4,7,6,1}. I need an algorithm to find the L-th max/min in each length K subarray.  For example, for the above array, let K = 5, L = 3. I need to find the 3rd minimum of each length K subarray.  Expected output:  Subarray: [3,2,8,4,7] = Third minimun is 4. [2,8,4,7,6] = Third minimum is 6. [8,4,7,6,1] = Third mininum is 6.   Kindly help me find the algorithm.


I'm making a voltmeter for the college senior project, and the problem is that voltage divider should equally split 17V into two 9V(nominal value of the batteries. As of now, an actual voltage is 8.5V and eventually will go down as the batteries die, so don't freak out too much by my round errors.) sources, but as soon as I connect Arduino board to the circuit, voltage( across the resistor it's connected to) drops to 2-3 Volts. Which is apparently enough to power the micro controller, but not enough to light the display up. (it's also enough to use the other resistor as a space heater with 14 Volts across it).    Please feel free to look at the schematic of the device provided above. (either models, or specs of the components are written on the schematic)  Now I'll explain the design thoroughly: The idea is to use piezoelectric element (thin laminated  flexible piezoelectric beam), place it into a fluid flow (air) and rectify the outgoing AC signal with a full wave bridge. The next step is to amplify the signal, because it has very low magnitude and arduino analog pin can't register it without amplification.   Amplifier needs at least +-7V supply, so it's provided to it from the two 9V batteries, that are connected to a voltage divider. Therefore, the virtual ground of the circuit is in between the two batteries.   At the same time I want the arduino board (Actually it's not arduino, it's arduino compatible board dubbed Pro Micro 5V) to be powered from the same two batteries.  The whole thing works fine from USB, but from the batteries it works as it pleases!  Here are the design constraints of the device:   The entire device shall hang somewhere in a remote location, so it has to be powered from an autonomous power supply (two 9V batteries in my solution). The device should be as light, and as small, as possible. (solutions like adding another battery are not desirable). Arduino board have to have 5V on it to light the display.   Additionally I'd like to learn why micro controller has variable input resistance and what it depends on.  I've tried to figure out what is the resistance across the arduino's ground and RAW by assuming that the resistor of the voltage divider and the arduino are connected in parralel. In three different setups I've got the arduino's resistance to be equal to 221.93, 527.73 and 743.4 Ohm.  As I understand, the board has some kind of reducer at the voltage input that prevents the board from burning at supplied voltages above 5V and below 12V, but why it drops the supplied voltage from 8V to 2-3V?


Green highlights on some directories on running ls command

On running the ls command to under any directory, I find that some directories (and this happens with directories only) have an annoying green highlight around them for no apparent reason.  Would appreciate help to make this stop.  EDIT: This problem has cropped up suddenly. Would like to keep ls command color coding in general, but avoid these seemingly arbitrary directory highlights.


I have a matrix  matrix = [[0.0] * 4] * 4   it looks like:  0    0    0   0 0    0    0   0 0    0    0   0 0    0    0   0   I'm trying to add an element to the second row, third column so that the matrix looks like this:  0    0    0   0 0    0    3   0 0    0    0   0 0    0    0   0   When I do  matrix[1][2] = 3   it gives:  0    0    3   0 0    0    3   0 0    0    3   0 0    0    3   0   How do I fix this?


How works the NS record definition in DNS section at CloudFlare?

In domain configuration at CloudFlare, the DNS section stores the record definitions. What is the exact purpose of NS record here? If configured, it shows something like:  Type | Name       | Value                     | TTL -----+------------+---------------------------+---------- NS   | domain.com | managed by ns1.domain.com | Automatic   But the NS at authoritative DNS server (registrar) is configured accordingly to the CloudFlare assignments:  adi.ns.cloudflare.com bob.ns.cloudflare.com   And the latter are presented if the domain is queried for example by any DNS propagation checker (e.g. whatsmydns.net).  The domain is being managed by their DNS anyway, so what's the purpose of defining the NS records in CloudFlare configuration panel?


Java Annotations for Simple Arithmetic on Non Primitive Numbers

Everyone knows how simple arithmetic in Java works for primitives:  int one = 1,two = 2,three = one + two; double four = (one + two) / three; if(four % 1 == 0){      System.out.println("Yay for simple maths!"); } else{   throw new RealityError("http://www.youtube.com/watch?v=H91rPIq2mN4");  }   But the moment that you leave primitives things become complicated fast! Attempting to repeat the previous simple arithmetic is quite the challenge!  BigInteger bigOne = BigInteger.ONE, bigTwo = BigInteger.valueOf(2),             bigThree = bigOne.add(bigTwo);     BigDecimal bigFour = new BigDecimal(bigThree.divide(bigOne.add(bigTwo)));     if (BigInteger.valueOf(bigFour.longValueExact()).mod(BigInteger.ONE).equals(BigInteger.ZERO)) {         System.out.println("Yay for simple maths?!?!");     } else {         throw new RealityError("http://www.youtube.com/watch?v=H91rPIq2mN4");     }   Why aren't annotations used for operators like +, -, *, or /? Such as @DefaultAddOperator for a class that extends Number. Or, in the BigInteger class, why can't it implement an interface that simply states what operation to do when an operator is called on the class. This notion isn't too far fetched, I mean it's used with "Hello World!".toString() and the overloaded operator +, and would simplify the above class based arithmetic considerably.


I am new to Blender and i am currently modeling a pirate ship and i would like to make folded sails like the one in the picture.  Thanks in advance.


Addslashes puts a slash into the database

I'm guessing that there is a simple explanation for this but I can find it anywhere.  Please know that this is not a security issue as I only have this form on the web when I am adding music to my DJ database.  When I finish, I take the form down.  I just need to get around the issue of apostrophe in either the Artist name or Song Title name.  This is the code I have:  $cleana= addslashes($artist);  $cleant= addslashes($title);  $artist=$cleana;  $title=$cleant;   My problem is that it adds 3 \'s to the string and when it writes to the database there is a \ in the entry.  These are the only two fields that could possibly have an ' in them.  Thanks in advance.


How to tar all files in current directory using tar but without inputing names of tar file and all files?

System:   macOS Sierra 10.12.6    Raw input(example):  . ├── f1.md ├── f2.md ├── f3.md ├── f4.txt ├── f5.csv └── f6.doc  0 directories, 6 files   In a test folder, there are 6 files.  Expected output:  . ├── all.tar ├── f1.md ├── f2.md ├── f3.md ├── f4.txt ├── f5.csv └── f6.doc  0 directories, 7 files   Trying and Problem:  tar -cvf all.tar f1.md f2.md f3.md f4.txt f5.csv f6.doc    Though I get the result from the above method but I have to inputing all file names and the compressed file name, which is inconvenient. For example , I can select all files and right click, then choose compressed option without inputing all.tar (I don't mind the .tar filenames.)  Hope:  command-line method without inputing specific file names.


Strange behaviour of binomial coefficient's delimiters

This question led to a new package:      While writing down my Combinatorics exercises I found that the binomial coefficient's delimiters weren't displayed as indicated inside the amsmath documentation.  By subsequent trials and errors I was able to reduce the volume of my document to this simpler and fully compilable MWE:  \documentclass[11pt]{article} % \usepackage{amsmath} % \makeatletter % \usepackage{lmodern} \usepackage{lipsum} % \makeatother % \begin{document} % \lipsum[1] \begin{equation} 2^k-\binom{k}{1}2^{k-1}+\binom{k}{2}2^{k-2} \end{equation} \lipsum[1] % \end{document}   Which gives (using TeXworks 0.44 on MikTeX 2.9.4521 updated 09/10/13) this un-expected result:        While the amsmath doc shows that with the loaded packages inside the MWE the result would actually be like this:        From here we can see that the delimiters on the first example are a little bit stretched vertically as they surpass the arguments inside the binom. coeff.  The more strange event is that when I comment the line \usepackage{lmodern} the result on delimiter's shape in my example looks exactly as the amsmath doc:  \documentclass[11pt]{article} % \usepackage{amsmath} % \makeatletter % %\usepackage{lmodern} \usepackage{lipsum} % \makeatother % \begin{document} % \lipsum[1] \begin{equation} 2^k-\binom{k}{1}2^{k-1}+\binom{k}{2}2^{k-2} \end{equation} \lipsum[1] % \end{document}   Output:        From here I deduce that the problem lies inside lmodern, but I'd like to keep using this package and fix this wierd "issue" with the math mode. Is there some clue that I've missed or this is in fact an update-process bug infecting amsmath's delimiter control?


I can't delete a channel I created on Slack

I followed the instructions for deleting a channel by clicking on the gear icon and going to Additional Options ... but I only get 2 options:   Rename this channel Set the channel purpose   I want to delete it, and I thought I could since I'm the one who created it.  Does anyone know how I can delete it?


I am new to Linux and have a need to install Wireshark 2.0.0 on VirtualBox's Xubuntu 14.04. I have already downloaded .tar.gz package and extracted it. Then I opened terminal in the wireshark folder and type /.configure with intention to follow it by make and sudo make install executions but the attempt as unsuccessful as sudo apt-get install wireshark. Could somebody help me how to install Wireshark step by step, please?


Proving isometries of the plane are bijective

So I'm trying to prove that every isometry $I:\mathbb{R}^2 \to \mathbb{R}^2$ is bijective.  I have already proved that I is injective (which is almost immediate) and I also proved $I$ is continuous (because I thought that might be useful) but I'm having trouble with the proof for surjectivity.


Is there a way I can initiate a dashboard refresh from a VF page remotely?  Is there an action or a URL I can use to refresh a specified dashboard?  I want to recreate the refresh dashboard button on my VF page. I have seen the schedule refresh option but I am looking for more control for the user to refresh the dashboard on demand.


Could you please let me know how I can change the creation date of a file in Lion.  I realise there is the touch-t command but that does not work in Lion.  A couple of people have mentioned another way, but I think they've written the solution in "coder" language rather than layman language - would someone be able to answer it in a way a layman can execute?   Many thanks for your help.


What would be a good substitute for coconut milk in curry sauces?

Specifically, if I work from a started paste that require adding coconut milk, what would be a good substitute?


I have Android 4.3 jelly bean on my Nexus 7. How do I get Kitkat?  I have tried exploring the Android website. I have also found some tutorials out there like this one -   but they seem to require taking steps that are quite low-level. I don't think a consumer like me is supposed to delve into such a low-level ...


Hi there I have spent about an hour making some edits to my project only to find that for some reason all the cubes, that I had set to fall and bounce on the plane, now simply hover in mid air.  I have uploaded the project in question below. (or will try to) I would be very grateful of any help.   This question was removed as of apparently being solved by an answer given to another question which referenced to reseting the rigid body world cache. This would make sense as I have been editing the FPS. However I have never enabled rigid body world. And it has worked perfectly fine before. I actually originally downloaded this project as a template put have since heavily modified it. I have re downloaded that template and found that it too of course does not have a rigid body world enabled. I can not find out what is wrong because I have realised that I don't know how the cubes ever managed to fall to the ground.  Here is a link to the original template that I used.   Thanks for the quick response that I previously received.


Can I install Ubuntu 16.04 LTS along side Windows 10 in my Asus Vivobook 14 without any problem? It has an Intel i7 8th Gen processor 1TB HDD

Can I install Ubuntu 16.04 LTS along side Windows 10 in my Asus Vivobook S14 without any problem? It has an Intel i7 8th Gen processor 1TB HDD. I want to know if someone is using Ubuntu by dual booting on this laptop and how this is working. Thanks in advance.


I'm trying to render out an animation, but I keep running into a lot of fireflies. I would like to try to avoid the denoise addon since Im rendering an animation, but at the very least I would like to get my samples down (I'm using 500). My scene is relatively simple, its two low poly hallways with lights and doorways, and the emission on the lights is cranked up the 60 (I use filmic blender color management so it doesn't blow out the image). The only thing in my scene that I think could cause all of these fireflies is the lights, but Im not sure why as Ive used bright lights with filmic blender before and it worked just fine. Also most materials in the scene are over .5 roughness, and I got rid of the metallic materials in my scene and the fireflies were still there. Any help would be appreciated, thanks!  Blend File:


Book series about pairs of clones, Pratwa, that were mentally linked

There was a great sci-fi book series that I read about experiments with clones (Pratwa?). The lab produced sets of 2 clones that were linked mentally. When they meditated and merged consciousnesses they became a higher being, 2 minds became 1 new different personality. They all had different weapons... the first attack was done by smiler/slasher clones. There was a scientist/researcher clone for tech. When merged the sets of clones (5?) merged they met as Ash Oak. The security team revived an old Pratwa hunter... he later turned out to be a Pratwa who's twin had been killed. Does anyone know the name of book series?


Can you pick a random natural number? And a random real number?

Is it possible to pick a random natural number? How about a random real number? Is the axiom of choice involved in this?


Redirect url like www.url.com/test/client2 to something like www.mydomain.com/test.php?clientid=2

Firstly I'm not sure whether I'm asking at the right place or not (either here or stackoverflow). Sorry, if I'm not.  Before that:  My site runs on apache and developed using PHP.  What I'm trying to do is:   My client can generate a registration page for its customers. The default generated registration page URL is something like www.mydomain.com/test.php?clientid=2 But the url is long and ugly, so I created another option for the client to generate a prettier looking url, which starts with a shorter domain (eg: like.my) and a customizable 'path' after that. So the resulting pretty url my client want is like http://like.my/page. So there is a simple way to redirect the traffic from http://like.my/page to http://www.mydomain.com/test.php?clientid=2? Btw I have thousands of clients and each of them would have different pretty url pointing to different other pages.