What is a good photograph This might sound little lame,   Anybody please explain(if possible with example)  what is a good photograph ? How we can decide a photo which is good ? for an example if you are in a Deciding panel how you would decide or elect a photo as winner of a photography contest ?  What are the technical aspects that we need to consider ?   Not considering taste here   How actually judges judge theses photos.  Thanks in advance.
What makes a photo a good photo? I don't know if this is a stupid question, this just came across my mind.  Imagine a photo of a dog yawning.  Someone could say that is a very good photo as it is taken just at the right moment, from a perfect angle (eg. level with the dog) and it has a shallow depth of field focusing on its face.  Someone else might dislike it because unfortunately the dog is ugly.  So from that example I could say people look at the following elements when judging a photo (but I could be wrong):   The timing (if it's taken at the right moment) The angle it's taken from (composition?) DOF (composition?) The subject (eg. whether the dog is pretty)   I am interested to know what experts think the elements you look at when judging whether a photo is a good photo.  Thanks in advance for your comments.
Why does $(g^b \bmod m)^a \bmod m = (g^a \bmod m)^b \bmod m$? I have been trying to understand why the diffie hellman key exchange algorithm works, specifically why the two exponents can be swapped in it without the result changing.   So my specific question is why:  (g^b mod m)^a mod m  = (g^a mod m)^b mod m  I am interested in the reasoning/proof/explanation behind why it is true.    Thank you Which commit has this blob? Given the hash of a blob, is there a way to get a list of commits that have this blob in their tree? Automatically protect questions with three or more low-rep-user deleted answers There are a few "automatically protect questions" requests out there, but I'd like to add another twist.  I'd like to request that questions that have three or more deleted answers by users with &lt;50 rep be automatically protected.  The reasoning behind this is that we have lots and lots of "not an answer" flags in the mod queue.  But we cannot protect a question from the mod queue, so we have to open each answer, evaluate if the question needs protecting, then protect it.    This process takes a long time, and can definitely be automated, as the only thing you really need to check is how many new users are posting non-answers or are spamming their awful products. Is there a reliable way to determine the OS upgrade history leading to Windows 10 or if it was a fresh install? In my D&amp;D 5e campaign one of the PCs who's a wood elf started dating a dark elf, and as a result she got pregnant and she is about to give birth. One of the other players had their PC die and he is considering playing as the child of the couple.  My question is, which race is the child going to be? How to sum up values of each two rows across their line in linux Where can I install ubuntu if I have 4 primary partitions? I want to triple boot Windows 7, Backtrack, and Ubuntu. Windows and Backtrack are already installed. 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Use of 'const' for function parameters How to install apk in 2nd user of android 5.0 without playstore So, android 5.0.2 doesn't allow side loading of apks for 2nd user (irrespective of whether it is guest or standard user). "Unknown Sources" is disabled and is uncheckable. And I use a pure Cyanogen Mod 12 (android 5.0.2) without any Google apps. So, there is no Play Store app.  But I have root access.  As shown in the pics, Unknown Sources is Uncheckable and installation is blocked.  (Click image to enlarge)     With this situation, how can i install apks on to the 2nd user account??  EDIT:   It seems Google intentionally (in the name of security) blocked sideloading apks for 2nd user in android 5.0.2. There is a bug report . And sideloading was reenabled in android 5.1.   I will post how to sideload apks on lolipop 2nd user using adb. If this can be done without adb please post. Ubuntu 14.04 Wireless not working: no network interface. 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Is it possible to have similar detailed messages during shutting down/restarting/logging off? Here's the screen I want disable or give me more details: Add new alias to Gmail without SMTP (forwarding-only address) Should individual letters be preceded with "an"? I was reading a comic book and I noticed that the author used "an A" and "an N" in a particular phrase (screenshot below). While I understand the usage of "An A" here (A being a vowel and what not) and "N" having a pronunciation which has a sound similar to "A".  Since most of English alphabets have pronunciations which start with a syllable similar to one of the vowels or semi-vowels; is it OK to prefix the letters using "An"?  For eg. An X, or An Y.        Zenescope's Grimm Fairy Tales - Werewolves: The Hunger, page #8 (Click to enlarge)