My path to get my MA was delayed following a family tragedy, and I'm finally in a position where I can get back on track, so I would like to reach out to a professor I previously did lab work for a couple years ago. I have some general questions for him, but I also would like to see if maybe he has a Research Assistant position available, or maybe knows other professors that might, to try to build up my experience again. I was wondering if anyone might know the best way to approach an email like this? I was thinking maybe starting by formally asking if he remembered me and maybe giving some details about the work I did for him, but then I don't know where to go from there. I'd prefer to meet in person, but is that okay to ask after such a long time?  Thanks in advance.
When needing to ask a professor about something important and potentially delicate, what is an appropriate way to phrase the question or write the email?  Examples include:   Requesting a recommendation letter Asking for exceptions to policy (e.g., ignoring a course prerequisite, rescheduling an exam) Asking if you can do research with them, join a group, get into a program Scheduling a meeting, exam, or defense Letting them know about a change of plans Letting them know about a life event affecting your work or studies (e.g., wedding, funeral, sickness, vacation)
Bag-of-Words for Text Classification: Why not just use word frequencies instead of TFIDF? A common approach to text classification is to train a classifier off of a 'bag-of-words'. The user takes the text to be classified and counts the frequencies of the words in each object, followed by some sort of trimming to keep the resulting matrix of a manageable size.  Often, I see users construct their feature vector using TFIDF.  In other words, the text frequencies noted above are down-weighted by the frequency of the words in corpus.  I see why TFIDF would be useful for selecting the 'most distinguishing' words of a given document for, say, display to a human analyst.  But in the case of text categorization using standard supervised ML techniques, why bother downweighting by the frequency of documents in the corpus?  Will not the learner itself decide the importance to assign to each word/combination of words?  I'd be grateful for your thoughts on what value the IDF adds, if any. Why are all snaps being mounted and listed as block devices or partitions for Ubuntu 18.04? Execute a Java program from our Java program I used   Runtime.getRuntime().exec("_____")   but it throws a IOException as below:  java.io.IOException: CreateProcess: c:/ error=5   at java.lang.Win32Process.create(Native Method)   at java.lang.Win32Process.&lt;init&gt;(Win32Process.java:63)   at java.lang.Runtime.execInternal(Native Method   I don't know whether I have the problem with specifying the path or something else. Can anyone please help me with the code. How do I parse command line arguments in Java? How do I add a DOM element with jQuery? How do I put text over symbols? This is difficult for me to explain, but how do I put words over a symbol? For instance, I want to add words over an equal sign. Anyone know the command/syntax for that?  Also adding ^ doesn't cut it..., I want the text to appear ON TOP. primes whose difference is a multiple of $n$ Hello everyone this is my first question here so if there are any suggested edits  feel free to participate! Is it true that for every $n$ there two prime numbers $p$ and $q$ with $n\mid p-q$? I have verified this empirically but  am not sure if there is a proof for this Dynamic Keyword Arguments in Python? Does python have the ability to create dynamic keywords?  For example:  qset.filter(min_price__usd__range=(min_price, max_price))   I want to be able to change the usd part based on a selected currency. In this  to a question about a series, a theorem was stated:     If $A= \{a_i \}$ is a set such that $\sum_{i = 1}^{\infty} \frac{1}{a_i}$ converges, then $d(A) = 0$, where $d(A)$ is the  of the set.   My background in number theory is basically zero and all my attempts to prove this have been utterly unseccessful; would anyone please help me, or at least provide me with a hint to prove it? What is a predicate in c#? I need to do create a file with a filename such as :&gt;?, is this possible somehow? Windows stops it. I know references are syntactic sugar, so code is easier to read and write. But what is the difference between a pointer variable and a reference variable? Is "life" a countable noun in English? I am a learner of English. Sometimes I see an article (a and the) before the noun (life) but sometimes I also see the noun without any article. So I am confused when should I use an article before the noun and when I should not. Please check the examples and let me know are they correct?     Examples:      His life is an awesome life.      I want to get a beautiful life.      I like the life he lived. 14.04 microphone noice buzzing sounds My Microphone started acting up badly this morning has a loud buzz, it has got to be software it was working fine last night installed updates and shutdown last night and boom here we are, oh and i have a Microphone jack microphone and a internal mic, both are acting up... Please help  PLEASE help i need to use skype.  Dafull97 Local anchor for group master (move/translate/offset of group master moves group instances)? Let's say I start with the default Blender (2.64) file, except I set the cube to be 1 for all dimensions. At that point, the cube is at xyz location (0,0,0).  Then, let's say I select the cube with right mouse button, and go to Object / Group / Create New Group, and confirm the name "Group" in the "Create New Menu" bar with [Enter]. The selection outline turns green, meaning it's a group "master" (as far as I can see).  Now, let's say I press Shift-A; and choose "Group Instance" > "Group", and set the new instance to Z=2.3; with all selected, the view looks something like this:    Now, let's say I deselect all with A, then select the group master with right-click; and let's say I move it to Y=-2; then the result is:    ... that is, it is noticeable that the group instance/clone also moved in respect to its center (note the group instance axes, which remain in the set position)! Which means, I guess, that groups are defined in respect to the global coordinate center (0,0,0) as anchor.   My question is: is it possible to define a group, but in respect to the, say, bounding box center of the group as anchor - such that when I move/translate the group master, the group instances would remain anchored at their set position (basically, at the center of the group instance axes)? Also, is this documented anywhere in Blender documentation (I had problems finding this info)? As figured out in  localized SE sites must not be displayed in the HNQ's. But  actually is.        Has to be fixed I guess? Bootcamp: The startup disk does not have enough space to be partitioned When clicking continue on the first Boot Camp screen,  I am presented with a dialog that displays:     The startup disk does not have enough space to be partitioned.   You must have at least 39 GB of free space available.     This is despite "About this Mac" reporting 271GB of free space:    And "Disk Utility" reporting 268GB of free space:    Searching online I found  which suggested it was the result of Time Machine which i recently enabled and suggests to run sudo tmutil thinlocalsnapshots / 999999999999 which I did, it ran sucessfully, and I restarted, yet to no avail.  What is the solution to this instance of Apple's poor engineering?  Running macOS High Sierra 10.13.4 (17E202) Proving the Cauchy-Schwarz inequality by induction Find the population size that maximizes the probability that two random samples of size $20$ will have exactly $2$ members in common Ten fish are caught in a lake, marked, and then returned to the lake. Two days later 20 fish are again caught, 2 of which have been marked.  (a) Find the probability of 2 of the 20 fish being marked if the lake has $k$ fish (assuming the fish are caught at random). (b) What value of k maximizes the probability?    Progress:     I got the (a), $$\binom{10}{2}\binom{k-10}{18}\bigg/ \binom{k}{20}$$ But how do I get part (b) where $k$ is to maximize the probability? Quantum Entanglement - What's the big deal? Bearing in mind I am a layman - with no background in physics - please could someone explain what the "big deal" is with quantum entanglement?  I used to think I understood it - that 2 particles, say a light-year apart spatially, could affect each other physically, instantly.  Here I would understand the "big deal".  On further reading I've come to understand (maybe incorrectly) that the spatially separated particles may not affect each other, but in knowing one's properties you can infer the other's.  If that it the case, I don't see what the big deal is... 2 things have some properties set in correlation to each other at the point of entanglement, they are separated, measured, and found to have these properties...?  What am I missing? Is it that the particles properties are in an "un-set" state, and only when measured do they get set?  (i.e. the wave-function collapses).  If this is true - why do we think this instead of the more intuitive thought that the properties were set at an earlier time?