Mode Definition and 324 Threads

I have to find the maximun bps that it can be reach using a point-to-point link of 40 km long of optic fiber. I use an ITU normalized channel (100 GHz optic BW). So, I can choose any electric modulation and any optic modulation, too. Anybody could help me? Any answer is welcome. Thanks.

Homework Statement Two equal masses are connected by two massless springs of constant k and nat. length l. The masses are constrained by a frictionless tube on a pivot, (also massless) so that they remain colinear with the pivot. The pivot subtends angle theta with the vertical. The 1st mass...

I've recently bought a Hp 50g calculator and it offers the RPN mode which the Ti's don't have. I've been using algebraic mode up until now and I heard that RPN still beats it in the long run. I know that you can save many key strokes with RPN but it will definitely take me some time to learn the...

I've read an article in nature and found technical words "B mode signal" and "E mode signal". I don't understand what they are. In a website, they say it's like the electromagnetic field line but I'm still not clear. I also don't understand what k means in " the linear greyscale shows the...

In the problem, A string's tension is adjusted so that the speed of sound waves on the string equals the speed of sound in the air. The fundamental mode of oscillation is set up on the string, and in a pipe with one end open and one end closed with a length of half of the string resonance is...

Is there really such a thing called "starvation mode?" In other words, does a person's metabolism lower if he starves himself? I have heard reports that a persons metabolism actually rises for s short while, then lowers. Also, can't coffee and exercise raise your metabolism? For example: If a...

Hi, does anyone know what are the 4 different cases in a common mode differential amplifier? thanks a lot for all of your help. thanks, peace

Hi there, I'd like to switch 220-250v AC (50/60Hz) to 5 or 3.3v DC as easily and in the physically smallest way possible. Can someone offer advice on this? Do there exist IC's that will just do this for me? I have experience with LSR's but a transformer is too bulky for my needs. Thanks!

http://www.space.com/news/060623_hubble_acs.html

hey guys, the topic basically explains it...Can someone please help me out with this question...How does SMPS differ from diode rectification? Thanks jake

what is the mode (modus) of 1,1,2,2 I was checking the definition but it didn't count with two maximums. So is it 1,5 or both 1 and 2, or none of them?

Hi. Suppose that I want to look at the BDH action for a bosonic string: S_{BDH} = -\frac{T}{2}\int d^2\sigma \sqrt{\gamma}\gamma^{ij}\partial_iX^a\partial_jX^b The string is in flat spacetime and \gamma_{ij} is an independent world-sheet metric. I know that going to conformal gauge allows...

The group velocity is always negative except k=0 and k=Pi/a in the optical mode, is there a reason from the general picture of crystal vibration? Well, it seems to me that optical mode describes the situation that different atoms in a unit cell have opposite motions. Also, in the optical...

Compute the mode expansion for an open string with Neumann boundary conditions for the coordinates X^0,..., X^24, while the remaining coordinate X^25 satisfies Dirichlet boundary conditions at both ends: \[ X^{25}(0, \tau) = X^{25}_0 \quad \text{and} \quad X^{25}(\pi, \tau) = X^{25}_\pi \, ...

Will the median and mode change if the mean and strandard deviation change?

Hi, I'm new. I read aboot how an electron, and a positron colliding is supposed to produce two separate gamma rays in completely opposite directions 180 deg away from each other. I understand that the gamma rays are supposed to correspond perfectly to the mass of the particles involved. I am...

Need help... secx=3.45 (0<=x<=2pi) (Accurate to 2 decimal places) secx=-5.2 (0<=x<=2pi) (Accurate to 2 decimal places) How do you do these questions?...i am getting mixed up by doing it on the calculator...use radian or degrees mode??...cos or cos-1?...and also about csc and cot too...can...

urgent question: localised mode, localisation effect of linear atomic chain Hello everyone, it is great place you have here, hope I can learn a lot from you I am doing some readings and there are couple of concepts that I haven't been familiar with and if you spend a little time to help me...

When i am booting Knoppix 2.78 from a CD,It gives the error :Invalid screen mode 0 ff77 80x60 1 ff45 80x45 etc Enter correct mode number or scan When I enter 0(or ff77) or any other value,it continues upto showing the wallpaper and then crashes. Thanks in advance

I need information on coupled mode theory, specifically with reference to cylindrical waveguides. The more info the better. I have some references, but they are quite scattered, I am yet to find a reference that really encapsulates the 'heart' of coupled mode theory. If anyone has a good...

Can a so called "common mode voltage" be a dc voltage?? Say there is a simple series circuit... a DC source.. a resistor.. and finally a motor. The point where the motor meets the DC source is the ground. Neither side of the resistor is at ground potential. So if we want to measure the...

what is meant by SINGLE LONGITUDINAL MODE in laser?

Hi, I was wondering how you would re-arrange the differntial mode equation : Vo=(V2-V1)*(Rf/R1) to have V1 as the subject of the formula - its been annoying me for ages. thanks

How a computer is put under a STAND BY mode using Windows98 SE