Simple question really. When you double the ISO does it mean your shutter speed needs to be half of the original value to have the same brightness in the image?
What is the exposure triangle? How do the "sides" affect my photographs?
I have the following code:  MemoryStream foo(){     MemoryStream ms = new MemoryStream();     // write stuff to ms     return ms; }  void bar(){     MemoryStream ms2 = foo();     // do stuff with ms2     return; }   Is there any chance that the MemoryStream that I've allocated will somehow fail to be disposed of later?    I've got a peer review insisting that I manually close this, and I can't find the information to tell if he has a valid point or not. bounding a $C^1$ function that upholds $f'(t)\leq 1-f(t)^2$ How can I minimise the time to get a new UK passport? I am looking for a way to output all page IDs from the following menu:   &lt;?php wp_list_pages('depth=1&amp;exclude='3,5,11')); ?&gt;   Only top level pages needed, therefore the 'depth=1'.  Any help appreciated. how to change my hostname? My hostname is localhost, reported by hostname command, and terminal prompt root@localhost:~#.  How can i change it to mismis.com with mismis alias? and what is the proper configuration.  I confused after reading some articles on web.  My /etc/hosts:  127.0.0.1       localhost 127.0.1.1       srv345.myweb.com      srv345 178.162.231.61  janstone.mismis.com    janstone # The following lines are desirable for IPv6 capable hosts ::1     localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters What is the origin of "that's using your noggin"? I keep reading articles about CCD vs CMOS image sensors. What is the difference between these two types? What exactly do these sensors do in terms of photography?  Is a CCD-based camera going to be able to compete in the future? If I buy one, can I count on using it for some years or would it be better to upgrade to a camera with a CMOS based sensor? In the beginning of the series, it's mentioned that Muggle-born wizards/witches are identified due to inadvertent spell-casting. However, it seems like later in the book, disarmed wizards/witches are completely helpless.   What is the explanation for why some spells can be cast without a wand and is there an in-universe explanation for why this isn't done? Also, are there spells that can be cast non-verbally (with/without a wand)? In PHP 5, what is the difference between using self and $this?  When is each appropriate? Downgrading MacBook Pro 16” to Mojave Did anyone succeed in installing Mojave on the MacBook Pro 16”? It ships with Catalina but my corporate requires Mojave to connect to the corporate network.  I  but once I select booting from the Mojave external drive I get a “forbidden” icon and the system shuts down. locating latitude-longitude point in a piste-map with matrix transforms I am trying to plot points of a particular latitude longitude on this image of a Swiss mountainous landscape.    What I am doing is I have some 54 known location-points plotted on this image (not visible in the linked image), which is a piste map, and is therefore an artist's impression of the landscape. I found out the latitude-longitudes and also height above sea level for these 54 known points. I opened my piste map in the GIMP, and plotted the 54 points, while at the same time reading their co-ordinates in points, in the piste-map. So, I have x-y coordinates (lat-long) and z coordinate (height above sea level) for all those 54 points (so its a 3d co-ordinate system that I have), and I also have X-Y coordinates of those places in my piste-map (a 2d co-ordinate system), and I assume a Z=1 for all those points.   To locate a particular lat-long on my piste-map(I have the coordinates for this place, i.e. the lat-long but not elevation), I need to calculate their X-Y on the piste-map. My approach is, that I calculate distances between this point which is to be located and those 54 known points , and then I sort them in ascending order. The first two points in this order will be the nearest points to the one which we want to locate. Now, I find my 3rd known point, and for that, I loop over the rest of the points, to get the nearest possible point such that this point forms a triangle with the first two closest points with the point which is to be located falling inside the formed triangle. Now, I have three known points forming a triangle say triangle ABC. For these known points, I have a triangle A'B'C' in the piste map, and the point to be located lies in the latter. I figure out the transform matrix which when multiplied with the 3X3 matrix of the three known points(in this 3X3 matrix, each row corresponds to a point, with the column values x,y and z in the 3d scape) results in a 3X3 matrix of those points in the piste-map. I multiply this transform matrix calculated with a new 3X3 matrix for three points, the first one being the point to be located, and the remaining two are the last two known points in the first 3X3 matrix. This way, the first two elements of my resulting matrix are the X and Y values for the point to be located, and I proceed ahead to draw the point on the piste-map. Is this approach correct with respect to the way I am using the transform matrix? Thanks! I would really appreciate if any alternative approaches are suggested as well! Korea: Visa required to go to the city while in transit in Seoul for a Philippine citizen? Hi I'm traveling to Uzbekistan and have 12 hours layover in Seoul via Korean Airlines. Do I need a visa to go out of the airport for sightseeing? I'm a Philippine passport holder. What is the reason that the value "47" is so popular in electrical engineering? The easiest way to explain this question is with a thought experiment:  Consider God, the ultimate of everything, who is wholly omnipotent (all-powerful) and omniscient (all-knowing). Let's just say, hypothetically, that he wanted  (this is a totally random example I just happened to be reading about; I could have just as easily said He wanted Bob to score a free-throw in basketball 3 times in a row tomorrow, or Sally to knit a blue sweater on Sunday, November 4th, 2012).  But anyways, one way He could do this (get X group of people to save a man from a burning car) is: At the beginning of time, God could instantly plan out the future and set in motion a massive chain of events, from the creation of light and stars, the creation of Earth and the creatures, mankind, then civilization with all the conflicts and progress and glory that comes with it, such that one day, a few people would come from out of nowhere—complete strangers to each other—and save this man (also a stranger) from under a burning car. God need not intervene at all this whole time, He merely "ignited" the chain of events from day 1 and watched it unfold exactly as He planned. Let's call this Universe A.  He could also, being all-powerful, just freeze time for a bit and skip a few steps, creating the world and universe instantly, with all the civilizations and animals and things in place, putting all the strangers there together next to a car which is already on fire and the man trapped under it. Then press play, and presto, you have the exact same scenario, without billions of years of buildup. Let's refer to this as Universe B.  God is obviously capable of doing both. My question thus is whether there is an  (really any difference at all) between Universe A and Universe B. Personally, I don't think this kind of power is outside of God's capability; he should, after all, have no problem with creating identical universes which match up exactly once they reach "biker under the car" moment where He unfroze time in Universe B. At that moment, Universe A and Universe B are exactly the same, right? Or is there somethinge special about Universe A, with all it's buildup, that separates it intrinsically from Universe B? In other words, is it outside of God's ability to make them exactly equivalent? Photoshop: How to draw a guide with an exact distance from another guide Before drawing, I want to draw all guides for my layout. For example, I have a guide line named A already. After that, I want to have another guide named B  parallel with guide A and at 50px distance from it.   I have three solutions:   Draw line B and by "some way", I can see the current distance directly when I'm drawing, so I can make the distance exactly what I want it to be.  Draw line B. And then I use the Ruler tool to see the distance between the two guides. This method has disadvantages: maybe the ruler line that I draw isn't perpendicular with the guides and I'm not sure when the distance is enough. There are other clever ways, that help me get this job done fast and easily, but that I don't know yet. I think Photoshop should support this feature.   What is the best way to achieve this? Do rogues get sneak attack damage added to attacks made outside their turn? PHB says 'once per turn,' so, it would seem that a Rogue with Sentinel, for example, could "consistently" deal Sneak attack twice per round (whether the enemy triggers an OA or the melee weapon attack provided by the Feat).  So, can rogues deal sneak attack damage with any weapon attack outside their turn? (obv. one that meets the standard requirements--finesse, adv or adj ally) Given $a>b>2$ both positive integers, which of $a^b$ and $b^a$ is larger? How do I type Arabic text in Photoshop? I want to type Arabic text in Photoshop, but the text appears disjointed and the letters do not connect at all. For example محمد appears as م ح م د.   I'm using Photoshop CS6 on OSX Mountain Lion. CSS Margin Collapsing So essentially does margin collapsing occur when you don't set any margin or padding or border to a given div element? Short story collection about Transporter "Doors" I'm looking for a short story collection about different uses/inventions of transporter doors. I think it was just a single author collection, that I read in the early 2000s.  In each story these Transporter Doors exist, I seem to remember them being described as blank grey sheets. You step through them and come out somewhere else. The forward to the book talked about early Rocket stories where the launch of a spaceship would be the end of the tale.  Plots of the individual stories:  Two men one of whom's home is inside an asteroid are discussing the use of Base12 in their society and if it is because they have 12 fingers, one says that "people" used to use base10. The implication is that a different species arrived through the doors and replaced humans.  A man puts the code for his home into a door and is instead transported to prison where he's accused of murdering his wife, which he strongly denies.   Two scientists and a pilot take a probe ship deep into Jupiter's atmosphere, the will return to base via a door that they need to construct while they are down there. The scientists dislike each other and don't work well together. When they finish the door, the hamsters seem woosy out the other side, but the scientists insist it is ready. The pilot says he will go first as he can't fix it if it's wrong. When he arrives on the far side he's mentally damaged and the scientists have to get along without him acting as a buffer while the try to save themselves.