Email Definition and 163 Threads

Hey all. I've recently accumulated upwards of 5 or 6 different email accounts that I need to check and I'm having a hard time keeping track of it all. I'm looking for a good program for windows that I can use to keep track of all my accounts instead of having to open and log into each one...

As the Heaviside function is a function of t - 4, that means all other terms must also be functions of t - 4. The sine function is, but the exponential isn't. However with a little manipulation, we get $\displaystyle \begin{align*} f\left( t\right) &= \mathrm{H}\,\left( t - 4 \right) \,\sin{...

Taking the Laplace Transform of both sides we have $\displaystyle \begin{align*} \mathcal{L}\,\left\{ y'' + 4\,y \right\} &= \mathcal{L}\,\left\{ \mathrm{H}\,\left( t - 7 \right) \right\} \\ s^2\,Y\left( s \right) - s\,y\left( 0 \right) - y'\left( 0 \right) + 4\,Y\left( s \right) &=...

As the denominator is a function of s + 3, it suggests a shift had to have been utilised. As such, we also need the numerator to be a function of s + 3... Let $\displaystyle \begin{align*} u = s + 3 \end{align*}$, then $\displaystyle \begin{align*} s = u-3 \end{align*}$ and thus...

It's not entirely obvious what to do with this question, as the denominator does not easily factorise. However, if we realize that $\displaystyle \begin{align*} s^4 + 40\,000 = \left( s^2 \right) ^2 + 200^2 \end{align*}$ it's possible to do a sneaky completion of the square... $\displaystyle...

Suppose one was working for a Professor. Then you mutually decide that it's not a good fit. The professor has been helpful in terms of suggestions for other people to work with and you found another professor who has given you some reading material earlier. How do I email the new professor if...

$\displaystyle \begin{align*} A\,A^T &= \left[\begin{matrix} 3 & 0 & -4 \\ 4 & 0 & \phantom{-}3 \\ 0 & 5 & \phantom{-}0 \end{matrix}\right]\left[ \begin{matrix} \phantom{-}3 & 4 & 0 \\ \phantom{-}0 & 0 & 5 \\ -4 & 3 & 0 \end{matrix}\right] \\ &= \left[ \begin{matrix} 3\cdot 3 + 0 \cdot 0 +...

A matrix is symmetric if it is equal to its own transpose, so to show $\displaystyle \begin{align*} C^T\,C \end{align*}$ is symmetric, we need to prove that $\displaystyle \begin{align*} \left( C^T\,C \right) ^T = C^T\,C \end{align*}$. $\displaystyle \begin{align*} \left( C^T\,C \right) ^T &=...

As there is a repeated root, the partial fraction decomposition we should use is: $\displaystyle \begin{align*} \frac{A}{x - 1} + \frac{B}{\left( x - 1 \right) ^2 } + \frac{C}{x - 2} &\equiv \frac{x^2}{\left( x - 1 \right) ^2\,\left( x - 2 \right) } \\ \frac{A\,\left( x - 1 \right) \left( x - 2...

We should note that we can write any complex number as $\displaystyle \begin{align*} z = r\,\mathrm{e}^{\mathrm{i}\,\theta} \end{align*}$ where $\displaystyle \begin{align*} r = \left| z \right| \end{align*}$ and $\displaystyle \begin{align*} \theta = \textrm{arg}\,\left( z \right) + 2\,\pi\,n ...

First let's write this number in its polar form. $\displaystyle \begin{align*} \left| z \right| &= \sqrt{\left( -2 \right) ^2 + 2^2} \\ &= \sqrt{4 + 4} \\ &= \sqrt{8} \\ &= 2\,\sqrt{2} \end{align*}$ and as the number is in Quadrant 2 $\displaystyle \begin{align*} \textrm{arg}\,\left( z...

$\displaystyle \begin{align*} z^3 + 1 &= 0 \\ z^3 &= -1 \\ z^3 &= \mathrm{e}^{ \left( 2\,n + 1 \right) \,\pi\,\mathrm{i} } \textrm{ where } n \in \mathbf{Z} \\ z &= \left[ \mathrm{e}^{\left( 2\,n + 1 \right) \, \pi \,\mathrm{i}} \right] ^{\frac{1}{3}} \\ &= \mathrm{e}^{ \frac{\left( 2\,n + 1...

To start with, we should find the points of intersection of the two functions, as these will be the terminals of our regions of integration. $\displaystyle \begin{align*} 2\,x^2 &= x + 1 \\ 2\,x^2 - x - 1 &= 0 \\ 2\,x^2 - 2\,x + x - 1 &= 0 \\ 2\,x\,\left( x - 1 \right) + 1 \,\left( x - 1...

Here is a graph of the region to be rotated. Notice that it is being rotated around the same line that is the lower boundary. The volume will be exactly the same if everything is moved down by 4 units, with the advantage of being rotated around the x-axis. So using the rule for finding the...

Hi, I want to write a program to email using gmail smtp. I got following code from internet. import javax.mail.*; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; import java.util.Properties; /** 10 * Created by anirudh on 28/10/14. 11 */ public class...

What is the $\displaystyle \begin{align*} \int{ \frac{54\,t - 12}{\left( t- 9 \right) \left( t^2 - 2 \right) } \,\mathrm{d}t } \end{align*}$ We should use Partial Fractions to simplify the integrand. The denominator can be factorised further as $\displaystyle \begin{align*} \int{ \frac{54\,t -...

I had a skype interview with a professor in Canada for M.Sc. admissions. This was 10 days ago on April 20. The interview went okay. He said he would talk to the graduate coordinator, check my application and get back to me by the end of April. Monday, May 2nd would be the first working day after...

What is the derivative (with respect to t) of $\displaystyle \begin{align*} y = 16\,\left[ \sinh{(7\,t)} \right] ^3 \cosh{(7\,t )} \end{align*}$? One way to do this is to apply the product rule. To do this, we need to know the derivative of each factor. $\displaystyle \begin{align*}...

What is the indefinite integral (with respect to t) of $\displaystyle \begin{align*} 50\,t\cos{ \left( 5\,t^2 \right) } \end{align*}$? $\displaystyle \begin{align*} \int{ 50\,t\cos{\left( 5\,t^2 \right) } \,\mathrm{d}t } &= 5\int{ 10\,t\cos{ \left( 5\,t^2 \right) }\,\mathrm{d}t } \end{align*}$...

Since we have this relationship between x and y, as the two sides are equal, so are their derivatives. We just have to remember that as y is a function of x, any function of y is also a function of x, with the inner function "y" composed inside whatever is being told to do to the y. So to...

I noticed that almost every professor and departmental staff at any university only uses salutations (Dear xxx, etc.) in their first email post. In subsequent email posts in the same email thread, they do not continue to use salutations. Will it be considered rude if I, as a student, also use...

To perform implicit differentiation we must make use of the chain rule. Basically if you have a function composed in another function, its derivative is the product of the inner function's derivative and the outer function's derivative. All other rules (such as the sum rule, the product rule...

We can write the system in an augmented matrix as $\displaystyle \begin{align*} A = \left[ \begin{matrix} 2 & -2 & -1 & \phantom{-}0 & \phantom{-}6 \\ 2 & \phantom{-}3 & \phantom{-}2 & -5 &-14 \\ 0 & \phantom{-}5 & \phantom{-}2 & \phantom{-}2 &\phantom{-}1 \\ 0 & \phantom{-}0 & \phantom{-}2 & -3...

The closest Inverse Laplace Transform from my table is $\displaystyle \begin{align*} \mathcal{L}^{-1}\,\left\{ \frac{2\,a\,s\,\omega}{\left( s^2 + \omega ^2 - a^2 \right) ^2 + 4\,a^2\,\omega ^2 } \right\} = \sin{ \left( \omega \, t \right) } \sinh{ \left( a \, t \right) } \end{align*}$ so we...

Effie has correctly found that the eigenvalues of $\displaystyle \begin{align*} A = \left[ \begin{matrix} \phantom{-}3 & \phantom{-}2 \\ -3 & -4 \end{matrix} \right] \end{align*}$ are $\displaystyle \begin{align*} \lambda_1 = -3 \end{align*}$ and $\displaystyle \begin{align*} \lambda_2 = 2...

I'm not sure where you're getting the idea that z = 2, as this is not correct. I'm assuming this is to be done without pivoting... Set up your augmented matrix: $\displaystyle \begin{align*} \left[ \begin{matrix} 2 & \phantom{-}1 & -3 & -5 \\ 1 & -1 & \phantom{-}2 & 12 \\ 7 & -2 & \phantom{-}...

Hi All, I recently started a new job and I was assigned a personal email address by the company, but I am clueless on how it works: The email is of the form : username@companyname.com I was told I can "log on to it" through Gmail. Anyone know how this works? I mean, how can I...

Recently Google decided to flood me with softcore porn. Enough. I tried about a dozen other free email providers. All I want to do is import my contacts and send email. I couldn't get it done. It was the usual software nightmare. Anyone have a recommendation?

Is it ok to email a professor asking them to confirm your grades to this point e.g. you send them all your homework grades and midterm grade in case of error and ask them about your final exam score? Would this be nagging and or condescending. Wouldn't want to hurt my image just before final...

I've applied to a particular university for fall 2016 graduate admission. The deadline for my referees to submit the application is December 01. One of my referees is currently extremely busy and has asked me to request the graduate administrator to contact him regarding the reference letter...

I have been interviewing interns for our spring internship program and one of the candidates recently sent me an email basically reiterating what he considers his strengths, thanking me for the time to interview him, and letting me know that he appreciated the opportunity. Now, I know people...

"An internal study at Lahey Electronics,a large software development company,revealed the mean time for an internal email message to arrive at its destination was two seconds. Further, the distribution of the arrival times followed a Poisson distribution. a.What is the probability a message...

After asking a professor about undergraduate research on Friday, I received a positive reply that very evening. The professor also asked me to send him my CV. Hovewer, it would take me some time to make it. Would it be ok to send the CV on Monday, or is it rude to take more time than him to reply?

Well the texas instruments ti-84 calculator is my favorite toy. I use it for anything I can from getting a girl to put her phone number in my calculator to programming. Is there a way to somehow add an external circuit that can make the ti-84 send text messages. I bet there would have to be a...

I have so many questions about the universe so if there are any physicists(with a degree) i could email please tell me.

An issue I’ll call Issue 1 arose and prompted Event A to occur. A few days after Event A occurred, I received a virus email I’ll call Virus Email 1. The content of Virus Email 1 referred to something that is a direct outcome of Event A. Therefore, Virus Email 1 is directly related to Event A...

Is it possible to do a wildcard google-search to show all the email addresses in a company ? If I know an email address exists like ... john.smith@123company.com Is there some way of doing a wildcard google-search which will list all emails ... *@123company.com where * = wildcard...

I communicate by email with several people who have begun to use smart phones. I noticed a big change in email after they got the smart phone. Their email became less reliable. They say they sent email that I didn't receive. They say they didn't get emails that I sent. I wonder if there's a...

Is it absolutely imperative to have a yahoo email to create an account on the photo sharing website flickr? I never cared for yahoo's email service and think that it's silly that I'm being forced to create an account there in order to join tumblr. There isn't any way around this?

Hello Physics Forums, CS department, I want to create an email service similar to gmail.com or mail.yahoo.com. Where people can sign up for free. I have basic coding experience that includes getting an A on Intro to Java course at a university. Prior to that I have taught myself PHP. Ruby on...

Hello PF! I wish to do research as an undergrad, so I am thinking of sending emails to professors to ask for any available positions. What would be the most professional way to do this? Thanks in advance,

I have problem with my email keep sending out email with virus to others. I have change password a few times and it did not help at all. I have Norton 360 already and that does not seems to help. What can I do to fix it? It is a very new computer in service for about a month only and I have...

Does anyone know if the Honorsociety.org website is legit or if it's a virus. I just got an email saying i got accepted into it. I usually ignore most of the emails on my school account. They're mostly job offers and what not.

So I got a random email today telling me that I was accepted into the university honor society (honorsociety.org), whatever that is, due to my academic excellence and nomination. This is laughable considering my GPA sucks (although I have a 4.0 major GPA, just haven't taken many major classes...

An email conversation has gone like this: A: Can you come by sometime next week? B: I'm free Thursday or Friday C: "Can you stop by in the morning?" OK, does that mean he wants me to come by next Thursday or Friday in the morning, or is he separately asking me to stop by tomorrow?

Hey, Not sure if this subforum is the ideal place for it, but in some way I am asking for academic guidance, so... I was wondering: if a professor concludes his email to me using just his first name, is it then good etiquette to start my reply with "Dear [first name]"? I suppose the...

Homework Statement Let M(x,y) be "x has sent y an email message" and T(x,y) be "x has telephoned y," where the domain consists of all students in your class. Use quantifiers to express each of these statements. (Assume that all email messages sent are received, which is not the way things often...

Miko asks:

I sent out an experimental sample plan a few days ago. I copied four people, including our division director. Today I got a response from one of the recipients that made it clear he either didn't read the plan, or didn't understand a word of it. I won't claim to be a great technical writer...

Are you aware of any regulations about using (within law) emails for advertising? In Poland we have a law against spam that - basically - allows me to send a single email stating something like "We are a Bluewidgetcorp, producers of cheap and reliable blue widgets, if you are interested...