The math font looks spectacular here, and I want to use it for my thesis (LaTeX):   A sample:   An ideal answer would involve a few lines that could be placed in a preamble without downloading extra stuff (I'm using Latexian).
Is it possible to identify the font used in a specific document/picture?  Answers to this question should identify:   Possible methods to do this (perhaps one answer per method) and adequately describe how to use it (as opposed to merely stating it); Ways of finding the identified fonts, if possible (free or not); and Any prerequisites associated with the method used, if required (for example, "In order to use method X, your document has to be in format Y").   This question is meant as an FAQ, based on an . Its aim is to facilitate the community with the general procedures involved in font identification. Similar cases are solved on a per-usage basis on 's  tag.
Digitizing Free Satellite Imagery in QGIS without getting Alignment issues with Openlayers Plugin Is it really incorrect to start a sentence with "and"? I know it's wrong, but I do it all the time or else my sentences would go on forever. What does the tilde at the end of a file name stand for? In Windows, I believe that files with a tilde in the file name represent files that are currently open in an application. For example, Microsoft Word creates a file with almost the same name as the file you currently have open, but with a tilde in the name. It's icon is also partially faded. As far as I'm aware, this signifies a temporary file that exists   in case the application crashes and you didn't get a chance to save your file, or to allow the original file to remain unlocked by the file system and accessible to other applications.   In Linux, I ran into a *.log file with a tilde at the end of the file name (scan.log~). Does that mean the log file is currently open in another application that is potentially writing to it? Solving multiple congruences by CRT = Chinese Remainder Theorem How to create animated GIFs of prototype mockups, like the ones on Dribbble? I'm sure you've seen Dribbblers upload animated mockups of their designs.   Here's an example:     I can create mockups on Photoshop and even apply simple Tween Animations to them but I can never get my GIFs to look like the example here.   What are Dribbblers using to create these animations?   Notice that the animations also include touch points and perfect motion. I would like to convert my Photoshop mockups to do the same.  How can I create an animated example of my mockups, similar to the ones created by Dribbblers? I downloaded the Upwork desktop App on ubuntu 18.04. When I open it with Gdebi package installer I saw this error:    I tried to install gksu manually via sudo apt install gksu but I got this error  Building dependency tree        Reading state information... Done Package gksu is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source  E: Package 'gksu' has no installation candidate   How can I install this software on ubuntu 18.04 (I download it yesturday so it is the most recent version on upwork website) ? I have a dozen or so image files on my iMac's desktop.  Most of the time, after booting up my computer, it displays a thumbnail of each image (as it should).  But sometimes, the thumbnails won't show up (see screenshot below).    It appears to happen randomly.  I estimate that it happens about 20% of the time.  Why is this, and how can I prevent it from happening?  I am running OS X 10.9.4.  Thanks. Apparent Violation of Newton's $3^{\text{rd}}$ Law and the Conservation of Momentum (and Angular Momentum) For a Pair of Charged Particles Consider a system of the two identical positive point charges situated in free space (isolated from the influence of any other external fields) as shown in the attached diagram. Particle $1$ is at $(a,a,0)$ and particle $2$ is at $(0,a,0)$. Their velocities, at the considered instant of time, are as shown in the diagram ($\mathbf{v}_1$ along the $+x$ axis, $\mathbf{v}_2$ along the $+z$ axis).    Now, by applying the Biot-Savart law, we find that the magnetic field due to particle $2$ at the position of particle $1$ is along $+y$ axis, which means that the force acting on particle $1$ is along $+z$ axis according to Fleming’s left-hand rule. A similar analysis shows that there is no magnetic force on particle $2$ as the magnetic field of particle $1$ should vanish at positions (relative to particle $1$) located along its velocity vector.  Now, if we observe the net torque on the system of two particles about the $y$ axis then it is non-zero and is directed along the $-y$ axis. Here, there are no external forces or torques acting on the isolated two-particle system, and yet the net torque, as well as the net force on the particles, are nonzero. Why? Also, Newton's third law of motion seems to be broken in this scenario. Why?    Edit $1$  I have come to know from the responses that the electromagnetic field itself takes away some momentum and angular momentum about the considered axis. However, I think that if I consider only two charged particles as my system then the Abraham-Lorentz force can be assumed to be acting upon the system, and that is sufficient to make sure that we have considered the momentum being carried away by the electromagnetic field itself.   Even after considering the action of the Abraham-Lorentz force for the two-particle system, the scenario breaks both Newton's third law and the conservation of linear and angular momentum. This is because the Abraham Lorentz forces do not exactly counterbalance the force and the torques, on the two-particle system under consideration, due to the magnetic field.    Edit $2$  The previous edit was a result of confusion and misunderstanding on my part. The force associated with the momentum carried away by the electromagnetic field as a result of the electromagnetic interaction described in the question is the Lorentz force itself which simply doesn't obey the third law of motion. The Abraham-Lorentz force is a different story. It is associated with the momentum carried away by the radiation emitted by the accelerated charged particles. This is an additional force apart from the Lorentz force and corresponds to an additional carriage of momentum by the electromagnetic field. The momentum carried away by the electromagnetic field in correspondence with the Lorentz force doesn't correspond to radiation. My machine is currently running Windows 7. I have 2 partitions: OS (C:) and DATA (D:). I intend to do a native Ubuntu 14.04 install. Assuming I format my Windows OS partition, will I have full access to my D partition in Ubuntu ? Can Superman see through his eyelids? I put all my music on a playlist seperate from the rest of the music on the iTunes library, so I could easily get to what music I wanted to listen to, instead of my brother or sister's music. My brother recently got an iPod nano, and didn't know how to use iTunes, after explaining it to him, he deleted my whole entire playlist. I didn't know, so when I hooked my phone up to the computer to sync some songs I was going to buy, all the music on my phone disappeared. I've tried re-doing the playlist and syncing all of it to my phone again, but it won't work. I've also tried turning off my phone for certain periods of time, still nothing.  I lost about 200 songs (thankfully not more), and I don't know how to get it back. Center Gravity in Unity a 2d planet in the center, where the players will be able to walk on it and also will be affected by center gravity. planet will be static and there won't be any other planets. so;  Is there a way that I can change the gravity position? yes you can adjust gravity via project settings but I want it to be in the middle x,y,z(0,0,0)  I have tried creating my own gravity but it wasn't very useful because objects wouldnt fall, stand on foot and also in contact with another object they would vibrate instead of standing still. (if they stand on the planet they would vibrate)          private void FixedUpdate() {     foreach(GameObject item in grav)     {         Attact(item);     } }  private void Attact(GameObject gmf) {     Rigidbody2D rgg = gmf.GetComponent&lt;Rigidbody2D&gt;();      Vector3 direction = rg2d.position - rgg.position;     float distance = direction.sqrMagnitude;      float forceMag = (10 * rgg.mass) / distance;     Vector3 force = direction.normalized * forceMag * 10;      rgg.AddForce(force); }   I can create a script that will change the gravity by the opposite of the object's position. this does work but I cannot see any way to do it for more than one object. Adding a CTAN package to a MacPorts-maintained TeX installation I have installed TeXlive through MacPorts and now discover that I am missing some package. For clarity let's use a trivial example and say I am missing lipsum.sty.  I now have two options:  Option 1  I go to a CTAN site, look for lipsum.sty, download it, and install it in ~/Library/texmf/tex.  This is not bad, but it leaves it possible that I will end up with a second lipsum at some point. That's why the second option is desirable.  Option 2  2.1-- I find out which MacPorts package includes lipsum.sty  and  2.2-- I sudo port install the necessary package.  How do I do 2.1? How to save an alias of an eval $(other_comand) command I've been using docker for a while and there's a command I write each time I boot up my docker:  eval $(docker-machine env)   I know eval shouldn't be used unless necessary, but it's mentioned by the following:  docker-machine env outputs environment variables like this:  docker-machine env export DOCKER_TLS_VERIFY="1" export DOCKER_HOST="tcp://&lt;some_ip&gt;:&lt;some_port&gt;" export DOCKER_CERT_PATH="/home/gableroux/.docker/machine/machines/default" export DOCKER_MACHINE_NAME="default" # Run this command to configure your shell:  # eval $(docker-machine env)   eval grabs these and load them in my current session.  Now what if I'd like to have an alias like this:  alias dockereval="eval $(docker-machine env)"   Syntax is good, but the problem is when a dotfile (let's say .zshrc as an example), well the content of the $() is evaluated when registering the alias when you source that file.  which dockereval   Results in  dockerenv: aliased to eval   I tried a few things like:  alias dockereval="docker-machine env | eval" alias dockereval="docker-machine env | /bin/bash" alias dockereval="eval `docker-machine env`"   but none did work. 2nd one is probably because it's running in a different session, 3rd does the same as $() I guess  Is there an other way to load these environment variables with an alias? I am a US Green card holder with an Indian passport expiring in 4 months planning a short weekend trip by road to Canada next month.  Will I be allowed to enter Canada considering my passport won't meet the "valid passport" criteria of 6 months? is it problematic to cluster across two datacenters w/aag? In general is it problematic to cluster across two datacenters that are up to 15-miles apart?  For this one particular project the approach is the following?   2-Node Failover Cluster across two datacenters, one node per datacenter local SAN disks, no shared disks 'Node and FileShare Majority' at third location on-campus employ AAG, failover will be manual; asynchronous mode   Is anyone implementing something like this with success??!?  Thanks so much for the help!! How can I write SQL for a table that shares the same name as a protected keyword in MySql? SSD for production database Does a subsequent charm effect override a previous one? In a recent session, I was confused about how multiple charm effects would interact with each other:  A vampire used its 'Charm' ability to charm a PC. It reads (paraphrased):     The target must succeed on a saving throw or be charmed by the vampire. It takes the vampire's requests in the most favourable way it can. It can repeat the saving throw if the vampire or its companions harm it. Otherwise, the effect last 24 hours or until the vampire is destroyed, is on another plane of existence, or takes a bonus action to end the effect.   Another PC then decided to attempt to wrest control back from the vampire by casting crown of madness on their friend. it reads (paraphrased):     The creature must succeed on a saving throw or be charmed. The charmed target must use its action before moving on each of its turn to make a melee attack against a creature other than itself that you mentally choose. The target can act normally on its turn if you choose no creature, or none are within its reach.   At the time, I ruled that both effects would take place simultaneously. This meant that Crown of Madness took effect first, and the vampire's charm afterwards.  Was this the correct ruling? Can a creature be charmed twice? Or does one charm effect override the other? .NET Attributes: Why does GetCustomAttributes() make a new attribute instance every time? So I was playing around a little more with attributes in .NET, and realized that every call to Type.GetCustomAttributes() creates a new instance of my attribute. Why is that? I would think that the attribute instance would basically be a singleton-per-MemberInfo, with 1 instance bound to the Type, PropertyInfo, etc...  Here is my test code:  using System;  namespace AttribTest { [AttributeUsage(AttributeTargets.Class)] class MyAttribAttribute : Attribute {     public string Value { get; set; }      public MyAttribAttribute()         : base()     {         Console.WriteLine("Created MyAttrib instance");     } }  [MyAttrib(Value = "SetOnClass")] class MyClass { }  class Program {     static void Main(string[] args)     {         Console.WriteLine("Getting attributes for MyClass.");         object[] a = typeof(MyClass).GetCustomAttributes(false);         ((MyAttribAttribute)a[0]).Value = "a1";          Console.WriteLine("Getting attributes for MyClass.");         a = typeof(MyClass).GetCustomAttributes(false);         Console.WriteLine(((MyAttribAttribute)a[0]).Value);          Console.ReadKey();     } } }   Now if I were to implement attributes, I would expect the output to be:  Created MyAttrib instance Getting attributes for MyClass. Getting attributes for MyClass. a1   Where the "class loader" (sorry, I have more of a Java background, not 100% sure how .net loads its types) would compile MyClass, and create an instance of MyAttribAttribute, and store them together somewhere. (probably the Perm Gen in the heap if this were Java) The 2 calls to GetCustomAttributes() would then just return the same earlier created instance.  But the actual output is:  Getting attributes for MyClass. Created MyAttrib instance Getting attributes for MyClass. Created MyAttrib instance SetOnClass   So... why? It seems like creating a new instance of all these objects for every call is a bit excessive, and not good for performance/memory management.  Is there any way to always get the same instance over and over?  Anyone have any ideas why it was designed this way?  The reason I care at all is because I made a custom attribute that internally holds some validation information, so in the Attribute I basically have a "private bool Validated" that I set to true. The validation stuff takes a while, so I don't want to run it every time. Now the problem is that since it creates a new instance of the attribute each time I get the attributes, Validated is always "false".