# Recent content by Eus

1. ### Relationships between bandwidth, Fourier trans & digital modulations

Hi Warren! Thank you for the enlightening information. That covers the gap nicely :-)
2. ### Relationships between bandwidth, Fourier trans & digital modulations

Well, in that case, I guess this is an expert question on a transceiver system. No wonder the book has a considerable gap between the FFT explanation and digital signal modulation. Does anyone have a pointer to understand the matters within the gap?
3. ### Relationships between bandwidth, Fourier trans & digital modulations

HiHo! W. Stallings's "Wireless Communications & Networks, 2nd edition" explains the relationships between bandwidth and Fourier transformation by depicting a square wave. The square wave is approximated with a Fourier series having several sine terms. The bandwidth is then defined by the...
4. ### Medical The Four Temperaments: Is san-mel possible?

Hi Ho! Moonbear: What is the most recent concept accepted among modern psychology scholars? alxm: No, I'm not joking. I am not a psychology guy and trying to find the truth out :-) "alchemy" under "chemistry"? I didn't realize that it is the situation. In that case, what is the right...
5. ### Medical The Four Temperaments: Is san-mel possible?

Hi Ho! Referring to http://en.wikipedia.org/wiki/Four_Temperaments under "Temperament Blends", I would like to discuss whether it is possible for a person to have a blend of sanguine and melancholic at the same time. AFAIK, a sanguine tends to be sloppy while a melancholic tends to be...
6. ### Integration of ((e^x)/(x^2)) with respect to x

Yes, I read your previous post. I just want to ensure myself that there is really no "another method" out there. Thank you for telling me about what happened to the mathematician :smile: Thank you for all of your help. Best regards, Eus
7. ### Integration of ((e^x)/(x^2)) with respect to x

Well, if I just tried to find out the answer, that fact would be enough for me. But, I want to know how in the past someone would be able to obtain that answer. Suppose a mathematician in the past encountered the same class of problem. Of course, the mathematician would have tried the...
8. ### Integration of ((e^x)/(x^2)) with respect to x

I have taken a look at the page on Wikipedia but it does not explain anything how a series of non-terminating integration by parts can be transformed to an exponential integral. Could you please tell me how to do the transformation? Or, is there any pointer to a webpage that shows how to do...
9. ### Integration of ((e^x)/(x^2)) with respect to x

I have tried it and it really did not work; it really undid the previous steps resulting in 0 = 0. Best regards, Eus
10. ### Integration of ((e^x)/(x^2)) with respect to x

Homework Statement \int{\frac{e^x}{x^2}dx} Homework Equations Integration by substitution Integration by parts: \int{u\ dv}=uv\ -\ \int{v\ du} The Attempt at a Solution Since it was clear that integration by substitution would not work, I tried integration by parts...
11. ### Dificult recurtion question

Hi Ho! I think you can easily solve your problem if you imagine you have the following objects: 1. MarkedWheel 2. MarkedWheelsPermutationMachine A marked wheel is a wheel that can be turned in only one direction. Each turn will display one mark on its surface. A permutation machine...
12. ### In what case will you mount a filesystem in a non-empty directory?

Because when I asked it for the very first time (09.17.07), I didn't know the reason. But, I encountered a case where I would like to mount a filesystem in a non-empty directory. So, I wrote the reason here on 03.22.08 to let others know. Best regards, Eus
13. ### In what case will you mount a filesystem in a non-empty directory?

Hi Ho! One reason to mount a file system on a nonempty directory is when the whole content of the directory will be rendered useless with the content of the file system to be mounted. For example, a DVD contains four ISO9660 image files of four different titles of games has been mounted under...
14. ### A question in flipping a number

If you use Java, you can just use its built-in function to do so: int fromBase = 10; int toBase = 2; Integer.toString (Integer.parseInt (args [0], fromBase), toBase); Next, you can just run your program conveniently like: java BaseNToMConverter 82733 Best regards, Eus
15. ### What is in all in a Makefile?

Yes, you are right! Thank you very much for telling me that it is called double-colon rule and it is documented in the texinfo file. Best regards, Eus