Why does the screen go black when I make the shutter speed faster?
Why am I getting black photos when I use the Manual feature on my DSLR?
I am investigating the vulnerability to  and I think I understand how and why this sort of attack works.  What I don't understand is why Lighttpd and NginX are not affected (according to the same article as linked above). What do they make so different? I've done a clean install of 18.04 and I can't open desktop folders, not even the desktop trash can. Anybody else had this issue? I click on the desktop folders (double click) and nothing happens.  Strange enough, I can open  them when using Nautilus and going to home\stackinator\desktop\ or whatever the path is (can't remember at this point). Why is charge of the electron negative? Why does append() always return None in Python? How do I bridge network interfaces? I have a laptop running 11.10 with 2 network interfaces, wired and wireless.  Wireless interface connects to the router with DHCP and connects to the internet. Wired interface is connected to a switch. I want the computers on the switch to get their IP addresses from the router not my laptop.     How would I go about setting this up? Bridging the interfaces? How to center a listing? I'm trying to get some console output in my homework. I put it in a listings environment but I want it to be centered horizontally on the page.  The only thing I get centered is the caption ;-/  \begin{minipage}{1\textwidth} \begin{center} \begin{lstlisting}[caption={Ausgabe des C-Programms},label={ggt_c_ausgabe}] a  |  b  |  q  |  u  |  s  |  v  |  t   ---------------------------------------- 78 |  21 |   1 |     |   1 |   1 |  -1  21 |  15 |   3 |   1 |  -3 |  -1 |   4  15 |   6 |   1 |  -3 |   4 |   4 |  -5   6 |   3 |   2 |   4 | -11 |  -5 |  14   3 |     |   2 | -11 |  26 |  14 | -33  ---------------------------------------- \end{lstlisting} \end{center} \end{minipage} How to get own process pid from the command prompt in Windows I'm trying to find a way to get my own PID from a command prompt (for later use in bat scripts).  So far the only useful way I found was to use getpids.exe from here : , but I'm looking for a command that's "built in" to Windows.  I'm looking for a "bullet proof" way. No assumptions about my process being the only cmd.exe or anything. Dealing with splits in my ground plane Whenever I'm making a cheap, 2-sided PCB, I run into this problem:    Where I have signal lines (on the top layer here) running over top of a big fat power trace (on the bottom layer).  Now, this is obviously terrible because there is no good return path on the bottom side.  For issues like this, Hott consultants has a good recommendation:    However, I wonder if a solution like the one below is also acceptable.    My intuition tells me yes, this solution is ok.  Over the break in the ground plane, the current will hop over the vias and then back down to the lower plane.  Some back of the envelope math tells me that this adds a trivial amount to the loop area, and therefore a trivial amount to the return impedance.  Can someone tell me...   How right / wrong my intuition is here about using vias? If my intuition is wrong, why? Also, if my intuition is wrong, what is the correct solution in this sort of situation (2 layer, with power traces under signal)?   For the record, these particular signal lines aren't terribly fast (500 kHz), but I would like to know how to deal with this situation when I have signals in the 5 - 10 MHz range.  Edit  Below is a screenshot of about 60% of the board.  Maybe it will help with the critique How do I increase the render distance? Prove that $2xy\mid x^2+y^2-x$ implies $x$ is a perfect square. Prove that $2xy\mid x^2+y^2-x$ implies $x$ is a perfect square. My work: $2xy\mid x^2+y^2-x \implies x^2+y^2-x=2xy\cdot k$ So,$x^2+y^2+2xy-x=(x+y)^2-x=2xy \cdot (k+1)$ And,$x^2+y^2-2xy-x=(x-y)^2-x=2xy \cdot (k-1)$ I found that for $x,y$ both odd, no solution exists. For $x$ even, and $y$ odd,no solution exists. Solution exists only for $x$ odd, $y$ even and $x$ even and $y$ even solution exists. Cannot do anything more. Please help! Calculating projected area of polygons with field calculator in ArcMap? How to access java-classes in the default-package? I'm working now together with others in a grails project. I have to write some Java-classes. But I need access to an searchable object created with groovy. It seems, that this object has to be placed in the default-package.   My question is: Is there a way to access this object in the default-package from a Java-class in a named package? SF Short Story about resetting the world every day Trying to identify a short story. I recall it was quite short, shorter than a novella. I read it within the last few years, but my impression is that it's from the second half of the twentieth century, maybe the sixties. I can't recall if I read it online, in an anthology, or collection. Set in America, a middle-aged man stumbles on a team (maybe like dwarves or gnomes) whose job it is to set up the world for the next day by removing all the previous day's &quot;stuff&quot;, like street furniture? (I know that makes no sense). He disrupts this process and somehow prevents progressing to the next day. I also remember the story was quite lighthearted with the team behaving in a very grumpy way like interrupted workmen. I thought the title was something like &quot;What happened to Tuesday&quot; or similar. For some reason, I thought it was by Keith Laumer, but a search doesn't reveal anything. The trope was similar to &quot;The Tunnel Under the World&quot; by Pohl, and &quot;The Adjustment Team&quot; by Dick, in that reality was constantly changed and controlled by an organisation of some kind. How can I tell how long (more or less) it will take me to complete a game? Possible Duplicate:          I often want to know how long a game is so that I can decide whether or not to buy it, or even to decide if I've got enough free time available in the near-future to make it worth trying to play and complete over a weekend. Sometimes I even want to know just because I'm getting a little tired of the game and I want to have a sense of whether or not I'm nearing the end, so I can decide whether to tough it out or pack it in.  What are some good ways of determining how long a given game takes to complete, on average? Rogue DHCP Server Can't be found Over the last 3-4 weeks I have been trying to find a rogue DHCP server on my network but have been stumped! It is offering IP Addresses that do not work with my network, so any device that needs a Dynamic Address is getting one from the Rogue DHCP and then that device stops working. I need help to find and destroy this thing! I think it might be a Trojan of some sort.  My Main Router is the only valid DHCP Server and is 192.168.0.1 which offers a range of 192.160.0.150-199, and I have this configured in my AD as Authorized. This ROGUE DHCP claims to be coming from 192.168.0.20 and offering an IP Address in the range of 10.255.255.* which is messing up EVERYTHING on my network unless I assign a static IP Address to it. 192.168.0.20 does not exist on my network.  My network is a single AD Server on Windows 2008R2, 3 other physical servers (1-2008R2 and 2 2012R2) about 4 Hypervisor VM's, 3 laptops and a Windows 7 box.  I can't ping the rogue 192.160.0.20 IP, and I can't see it in the ARP -A output, so I can't get its MAC address. I'm hoping that someone reading this post has come across this before. How to sort a Google Sheets Query by a custom ordering Good tools for drawing schematics I was going to add a bit of information to my post on a previous day using schematics and some instructions. What programs are being employed for this purpose?  I mostly want to see what others are using and that I can easily use to give descriptive schematics.  In a perfect world, and I know this is a case of me wishing, it would be:   Free. Extremely easy to draw schematics in. Allows simple production of waveforms for the inputs/outputs. How to make 'python' program command execute Python 3? The python program command executes Python 2. Python 3 can be executed using the python3 command.  How can Python 3 be executed using the python command? Difference of the \dots* My girlfriend is Russian. Last night we tried to fly her to the US on a valid tourist visa. She was stopped at DME and told she would be required to have $2700 USD to get back home immediately even though she had a return ticket. She said this was an "unwritten" rule because of the nonsense i keep seeing on CNN , Anybody else know anything? She is literally trapped and scared to death.