I recently purchased a full-frame DSLR with a reported highest ISO of 204,800.  I’m intrigued by the possibilities of the high ISO range and how far Lightroom and Aperture (I use each of them) can compensate for the noise.  So I set up an arrangement in my studio that I thought would give me some useful information about noise (see attached images).  The white shape on the right side of the images is a piece of  “white” (warmish white) watercolor paper.  It did have a slight bow to it in the set up, but its position didn’t change through the sequence of the attached JPEGs, nor did the ambient lighting (several fluorescent fixtures that I use to light my studio).  While I was certainly expecting some noise at higher ISOs, I observed some unexpected yellow areas in some of the images. I’d like to know if the discolorations are: 1) typical of sensors that work at such high ISOs;  or 2) reveal a sensor defect of some sort that I’d need to look into; or 3) might reflect a shortcoming in my experimental procedure; or 4) might be attributable to something I haven’t thought of.  The sequence of images shows the same arrangement shot (using a tripod)under the same conditions, with aperture f/5.6 and shutter speed set by the camera. The ISO range in the images is 3200 to 102,400 in 1 EV steps.  What got my attention was the unexpected appearance and then shifting location of the yellow area, beginning with the second image below and most noticeable in the last and second-to-last images.  These are small JPEGs, but I think they show the yellow area moving around well enough for the purposes of this post.  I wonder if something jumps out to anyone as an explanation for these areas of unexpected color and its movement from camera setting to camera setting.     ￼ ISO 3200   ￼ ISO 6400   ￼ ISO 12,800   ￼ ISO 25,600   ￼ ISO 51,200   ￼ ISO 102,400  ￼
I took a bunch of photos at my son's martial arts club using a D90 with a 50mm F1.8.  The club is lit with overhead fluorescent lighting, and I was getting some weird results where some shots are "white", others have an "orange cast", and still others are partly white and partly orange in the same shot.  I suspect it has to do with the combination of the frequency of the light flicker and with the camera shutter speed. Here is a sequence of 3 shots that show the problem.  The shots were taken with 1/500s at F2 and ISO-800 and with Auto-WB.  First shot ("white/normal"):    Second shot ("orange cast" at top):   Third shot ("orange cast" at bottom):   These were taken in burst mode within a second of each other.  Can anybody tell me what is going on?  And, how I can avoid this?
I'd like to write something in the shape of this "coat of arms".    I'd like to have the text filling the coat but with a hole roughly in the shape of the sword. I know there is the \shapepar command to create paragraph shapes so I tried to , a patch for XFig that allows you to draw the shape you want but it never worked on my computer (Mac OS X). I also know I can build the shape by myself with shapepar syntax but it seems really complicated and I don't think I'll make a lot of shapes. So if anybody has ShapePatch working on his computer or knows shapepar syntax very well, could he give me the code? I am in doubt as to whether the subject-verb agreement of the second sentence of this paragraph is correct :  Unfortunately, there is no such thing as the ideal home workshop because most people are limited by the space available and by their budget. However, the information and diagram here acts as a guide to help you formulate a sensible workshop layout and a machinery “wish list”.  I suppose if the compound subject is seen as a single unit, then the sentence can be considered as correct. A little further in the same book, another sentence has a singular verb with a compound subject :  Alternatively commandeer a garage, or build yourself a substantial workshop if outdoor space and permission allows – however, do consider the impact of machinery noise on your neighbours.  Can &quot;outdoor space and permission&quot; be seen as one thing, or would this be considered a mistake ? An awful identity We take place on $\mathbb C(x_1,...,x_r,x'_1,...,x'_p,u_0,...,u_r,u'_0,...,u'_p)$ with $r,p\in \mathbb N$     Show that :   $$\displaystyle{\sum_{i=1}^r \left(   \frac{\prod_{j=0}^r (u_j-x_i) \prod_{j=1}^p (x'_j-x_i) }{  \prod_{1\leq j\leq r, j\neq i     }(x_j-x_i) \prod_{j=0}^p (u'_j-x_i)}      \right)}-\displaystyle{\sum_{i=0}^p \left(   \frac{\prod_{j=0}^r (u'_i-u_j) \prod_{j=1}^p (u'_i-x'_j) }{  \prod_{0\leq j\leq p, j\neq i     }(u'_i-u'_j) \prod_{j=1}^r (u'_i-x_j)}      \right)}=\displaystyle{\sum_{i=1}^p x'_i +\sum_{i=0}^r u_i -\sum_{i=1}^r x_i-\sum_{i=0}^p u'_i}$$   I have seen this exercise in an old book at the library. Unfortunately there was no indication how can I solve the problem.   Anyway if someone can give me some ideas it will be greatful.   NB: Sorry for the title, I have not had other ideas Because of  I'd like to prevent apt-get upgrade and Update Manager from updating the "libgtk2.0-0" package.   How can this be achieved? the_excerpt not displaying I need to run a bash script at boot-time as superuser in Xubuntu. I don't know where to start. I have to do something described in a Arch Linux guide. That guide says exactly:     Add following at the end of the file : /etc/rc.sysinit   # Do my action /etc/rc.d/do_my_action  /bin/dmesg &gt;| /var/log/dmesg.log   But I do not have /etc/rc.sysinit and /etc/rc.d/ in Xubuntu. I'm sure there are equivalent ones, right? Earlier, I voted to close  as off-topic.  The question has since been closed.  There is an , but it didn't show up in the list when I selected "off-topic".  The options were:   Meta Stack Overflow Server Fault Super User Webmasters Programmers   Questions:   Should Wordpress appear in this list? Are there any other sites that should appear in the list?   Should all non-beta sites appear in that list by default? Could $X^3 + X + 1$ have a root in $E?$ Consider the irreducible polynomial $g = X^4 + X + 1$ over $F_2$ and let $E$ be the extension of $F_2 =$ {0, 1} with a root $α$ of $g.$  Could $X^3 + X + 1$ have a root in $E?$  When working through this sheet Ive come across this question in which im not sure how to answer so any help will be appreciated How to remove specific elements in a numpy array How to remove conference information from the ACM 2017 SIGCONF template? How can I change my VPN connection settings in Windows 7 from the command line?  I know how to do it using the GUI but I really need to do it from the console.  I need to change the user, password and internet address and then restart the connection. It doesn't matter if I have to install some third-party software in order to do this (from the command line). I've been searching for a quantum algorithm to compute the the inner product between two $n$-qubit quantum states, namely $\langle\phi|\psi\rangle$, which is in general a complex number. One can get $|\langle\phi|\psi\rangle|^2$ through thte SWAP test for multiple qubits, but this is not really the inner product as the information of the real and imaginary parts are lost. I came across this , which claims that the task can be done by simply using CZ gates. I'm not sure if I am mistaken, but it seems to me that such a circuit works for computational basis states, but not for general quantum states. Could somebody help me confirm if this is actually the case? If the above algorithm doesn't work for general quantum states, what algorithm would you suggest? Static Classes In Java How do you challenge the closing of one of your questions? As a newcomer to StackOverflow, I recently asked my first . I wanted to start with a fairly safe general question, to get the feel for how the site worked. My question was intended to be programming-related, but my original wording was not clear enough, so another user decided to close it.  I've re-phrased my question, and had received one useful answer before the question was closed, but I'm not sure what the procedure is after your question is closed to allow people to post answers again...  I've checked the FAQ and About pages, searched the SO questions, but have had no luck. Could someone point me in the right direction as to how I get my question re-opened, or if it is possible to do at all? How do I force Windows to check for updates? How can I speed up combat with a large number of enemies? I'm DMing for a campaign where the player characters will sometimes face small squads of creatures, most recently six ground troops and two archers helping out. In this setting, these creatures dominate the land the PCs are in and have an organised military, hence squads of enemies.  Combat tends to go quite slowly, however. Eight enemies and three players means the players spend a lot of time waiting between their turns!  Without reducing the number of enemies in the encounter, how can I speed up combat when the players are fighting many enemies? Can I ignore coefficients for non-significant levels of factors in a linear model? After seeking clarification about linear model coefficients  I have a follow up question concerning non-signficant (high p value) for coefficients of factor levels.  Example: If my linear model includes a factor with 10 levels, and only 3 of those levels have significant p values associated with them, when using the model to predict Y can I choose to not include the coefficient term if the subject falls in one of the non-signficant level?  More drastically, would it be wrong to lump the 7 non-significant levels into one level and re-analyze? queries with db_select don't respect integers Was Kylo Ren's Blaster Bolt Freezing Really Force Telekinesis? In this questions answer its stated that Kylo Ren freezes the blaster bolt in midair with telekinesis:       Because he is extremely skilled in Force telekinesis, Kylo Ren is able   to freeze not just objects but even blaster bolts in midair.   But as a commenter already pointed out, this seems nonsense (even in star wars force physics). The blaster bolt is, as far as I know, a cloud of plasma. If it is stopped by telekinesis, why should it continue its old path with its old speed after it is released? Wasn't it more a completely new force ablility like "time freeze"? While I admit in a case of time freeze the bolt should not have flickered all the time. Also the plasma should have expanded and vanished or simply cooled down releasing its energy to the surrounding air.  So when it was force telekinesis Kylo must have done the following:   Stop every atom in the plasma cloud Keep the cloud compressed and in form and shape. Isolate it to prevent the heat flow or keep it on temperature (is this still telekinesis?) Not just releasing it but accelerate it again exactly on its old path and speed.   This would be indeed a greate never seen mastery of telekinesis. And very ineffective. And if he wanted to be cool, wouldn't it be even cooler to change the path after the "release" so that it hits one of his enemies?  So what was going on there? Pure telekinesis or something else? Did the writers intend this? Or did they just not thinking it to the end? I have asked this question before  The first guy solved it in a way, but  i would like to know is there any efficient way to do so, because i did the same for N = 13 and N = 15  which took long time.  This problem is from a pen and paper test, ZIO-2018 Can i solve it with an efficient algorithm, well i am pretty beginner in algos, so if there is one kindly descibe it how can i do so?  Thank you