Recently (the last three day) my late 2013 iMac has been suffering from kernel panics. After reboot, console shows a 'Previous shutdown cause: -62'. Can someone please tell me what this means. The only thing I have changed is I added a new backup drive (2TB external). It seem to only happen after about ½ hour after wake (from sleep). It only does it when doing multiple processes, like running photoshop, iTunes open in background, youtube vids playing etc. So, any ideas. Any help would be appreciated, Thanks, BR
I have a late 2013 27" iMac running  Yosemite, and it randomly shuts off every now and then. I tried everything Reset SMC. Diagnostics, reformat Macintosh HD but still occurs and running out of options.
How to find and replace in linux on a large file? Oh, hi; So I've got this big json file and I'm trying to find and replace a few things but when I've used sed I get an error and I need a sed or awk string to find and replace it, without getting an error.  prajwal  Current: {&quot;telephone_numbers&quot;:[&quot;1-  Future: {&quot;telephone_numbers&quot;:[&quot;+1-  This is the command i tried and the error i got. sed -i 's/{&quot;telephone_numbers&quot;:[&quot;1-/{&quot;telephone_numbers&quot;:[&quot;+1-/g' output.json sed: -e expression #1, char 56: unterminated `s' command I am trying to slice up my models using the Boolean modifier.  After applying the modifier on my smooth mesh, I get the expected result, a flat dissection to separate my mesh into two.  The problem lies in how I can resolve the visual "jaggered" edge that separates my (smooth) mesh exterior from the flat dissection face.    Is it possible to achieve a smooth-to-flat variation without this artifact?   I tried to alter a mixture of the two but end up with artifacts, or unwanted blocky flat mesh faces around the dissection edge of my mesh. What are the Undying Lands? I've heard a lot about the Undying Lands but I don't fully understand how they're different from Middle-earth and why only certain people/races are allowed to go there.  Can someone explain? In Ubuntu, I want to open a PDF document generated for Adobe Reader 10. Apparently the latest version which I can install is Adobe Reader 9.5.5. Is there a way to install version 10?  I installed Wine, but I don't know how to install acroread using Wine. Show $\operatorname{Aut}(C_2 \times C_2)$ is isomorphic to $D_6$ (the group with $x^3=1$, $y^2=1$ and $xy=yx^2$).  I'm not really sure how to express the elements of $\operatorname{Aut}(C_2 \times C_2)$. Would it be sufficient to show the elements of $\operatorname{Aut}(C_2 \times C_2)$, find their order and show they bijectively map to every element of $D_6$ and satisfy $xy=yx^2$? Change of flavour, Weak interaction I couldn't find a straight and clear answer to this question on the internet: Why is the weak interaction (charged), the only interaction which can change the flavours of the quarks? I am trying to run a simple echo script via crontab. I set that to run every minute, but it doesn't give output on shell screen. However, it runs fine when I run the script independently.   Script  #!/bin/bash echo "Test Script"   Crontab entry:  root@example-server ~]# cat /etc/crontab SHELL=/bin/bash PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=root HOME=/     # For details see man 4 crontabs  # Example of job definition: # .---------------- minute (0 - 59) # |  .------------- hour (0 - 23) # |  |  .---------- day of month (1 - 31) # |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ... # |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat # |  |  |  |  | # *  *  *  *  * user-name command to be executed   *  *  *  *  * root /root/test.sh Gibbs free energy intuition What is ? As my book explains:     Gibbs energy is the energy of a system available for work.   So, what does it want to tell? Why is it free? Energy means ability to do work. What is so special about this energy? Can anyone simply explain?   I just want a math-free intuition. would this be considered a 'methodology' or a 'method'? Say I developed something called "Methodology for Establishing Remaining Life of Components". Basically, at work, we have components (or equipment). I wanted to develop a way to identify how much longer the components / equipment can last before they ware out and cannot be used.  It takes into account "the degree of damage currently in the component, the rate of future damage accumulation based on realistic operating scenarios, and the degree of damage required to cause failure." Taking these three into account, the remaining life of a component can be assessed. This is what I call "Methodology for Establishing Remaining Life of Components".   My question is, would this be considered a 'methodology for establishing remaining life of components' or just a 'method for establishing remaining life of components'? Or do you need more information to figure out if it is a method or methodology?   I cannot provide all the information for business purposes, but if additional  information is required to figure out if it is a method or methodology, I will provide it. Cross-site inbookmarks:mine search inbookmarks:mine was fixed for searching within a particular Stack Exchange site, but often I find myself wanting to search for a question I favorited/bookmarked, but not remembering which site it was on when it could conceivably have been on a number of different sites. On the cross-site search at  it does not work, presumably because we have different user ids on each site. Is there a way it could be made to work? Note that this request is for searching, not just viewing, so it's not a duplicate of . Just viewing is not very helpful when you have a huge volume of bookmarks across Stack Exchange sites. How does the ternary operator work? How could I define function with function such as Coefficient? Often when I edit one of my answers, it's because I want to better address the original question. The only problem is that I can't see the original question while I'm editing my answer!  I'd love to see the original question text beneath the "answer edit" form. This way I could scroll down slightly to read it if I wanted to, or just ignore it if not.  Current workaround is to click the 'return to answer' link and hope that you remember to launch it in a new tab/window, then tab back and forth.    Imported from this uservoice item: I'm wondering something. Whenever i right click on minecraft and click open with another application, i try to find Java JDK. I have installed it for minecraft itself, but i just cant find where java is on the list of other applications. Any help? How do I install and manage RPMs? $D_8$ as a derived subgroup Every undergraduate student knows that there are (exactly) two non-abelian groups of order 8: Dihedral ($D_8$) and Quaternion ($Q_8$). The group $Q_8$ has many interesting properties; simple of them are: it has unique element of order $2$, all subgroups are normal, etc. A property, which is strange and not obvious, the group $Q_8$ has, is that there is no group $G$ such that $G/Z(G)$ is isomorphic to $Q_8$. On the other hand, $D_8$ has no such property; there are (infinitely many) groups $G$ such that $G/Z(G)$ is isomorphic to $D_8$; example - $D_{16}$.   The question, I would like to ask, is related to a property of $D_8$, which is not shared by $Q_8$. There are (infinitely many) groups whose derived subgroup is $Q_8$; example- $SL_2(3)$. For groups $G$ of order &lt;100, one can check on GAP that $D_8$ is not a derived subgroup of any group. The natural question is then:  Question 1: Does there exist a finite/infinite group whose derived subgroup is equal to $D_8$?  Question 2: Does there exist a finite/infinite group whose derived subgroup is equal to (general) dihedral group $D_{2n}$ of order $2n$ ($n&gt;2$)? Does an ability resolve if the source of the ability leaves the battlefield? Player A taps  targeting Player B; its "deals 1 damage to target player" ability is placed on the stack.  Player B gets priority and responds with , targeting Goblin Fireslinger.  Both players pass priority. Snap resolves, and Goblin Fireslinger is returned to its owner's hand.  Does Player B still take 1 damage from Goblin Fireslinger's activated ability?  I know that if the creature had been killed/sent to the graveyard, the ability would still resolve, but I was told recently that because a player's hand is a private zone it couldn't. If anyone could confirm or deny this for me, it would be most appreciated. After upgrading to Windows 8, hard disk sporadically does not work; what's wrong? I dont know whether I can ask this question here or not. Please consider this if it not a proper place.  Here is my problem, I was using Windows XP previously and I changed it with Windows 8. After installation of Windows 8 when I booted it up, I found my HDD behavior changed. Sometimes it is running and sometimes it is not.  My system specification is :  Intel Motherboard (945 Express Chipset) Processor (Core 2 duo) RAM (2 GB) HDD(500 GB)   When I open my HDD for getting the cause of problem (I open that casing and check head  and disk). I did not find any hardware visible problem. Just it is stop rotating, before it can boot OS.  Can someone help me to fix this problem or recover data in this case.  NOTE : Warranty period expired, and I have my 5 projects in that and some important documents. I'm trying to draw a rounded rectangle with round "holes" using  but I need the rectangle borders to be thick and "holes" borders to be thin. Is there a better way to do so than:  \begin{tikzpicture}[x=1mm, y=1mm]     % Background         \fill[fill=black!10] (1.5, 1.5) rectangle (15, -15);      % Fill     \fill[fill=black!2, even odd rule, rounded corners=0.5mm]          (0, 0) rectangle (10, -10)          (2, -2) circle[radius=1.25mm]         (2, -5) circle[radius=1.25mm];     % Rectangle border     \draw[thick, rounded corners=0.5mm] (0, 0) rectangle (10, -10);     % Holes borders     \draw[thin] (2, -2) circle (1.25mm);     \draw[thin] (2, -5) circle (1.25mm); \end{tikzpicture}   The result image should look like this: I'm shooting with a Nikon 810, and my night shots often have a strong moire when I export them from Lightroom at 640x640 (optimized for Instagram).   This photo was shot at f2.8, ISO 4000, 15 seconds with a Nikkor 17-35mm. Does anyone know why this is happening??