## Cracking Source code of microcontroller...

I have lost the source code of one of my application in microcontroller P87LPC764 and EEPROM as it was burned 4-5 years ago but given security lock by one of my colleagues who has left the company( and i have no contact no). Now i need the source code badly. Is there any ways of recovering the source code?? Please help.

## Fourier transform of a non-integrable function ......

Fourier transform of a non-integrable function ... Dear all, I am working on Fourier Transform of a non-integrable function. And I am working on the numerical implementation of the FT, using FFT. Let's call this function F(v). One example is F(v)=-1/(5*i*v)*(1-exp(5*i*v)) The function has a 1/v term in its asymptotic expansion, which corresponds to a jump or Heaviside function in its transform. Using FFT, I can see the jump, with some overshooting after the jump and undershooting before the jump, along with some ripples. I want to reduce these artifacts as much as possible, because I am going to integrate this transform against other functions later. Hence obtaining a smooth function without much numerical artifacts is vital. How do I do that?

## How to plot vector valued function...

How do I plot a vector-valued function with maple11? Example: r(t)=(t)i+(t^2)j+((1/2)t^3)k I am a new user, so if you could explain to me step by step that would be helpful. Thank you, Jerry8273

## Problem with MapleTA and MathML generation...

In a test we had develop at our college, we need to use some MathML expressions on the questions, for example: to verify if an student know the sine law I use:
mode=Multiple Choice@ name=sine@ editing=useHTML@ @ answer=1@ choice.1= @ choice.2=@

## Coords Help...

I am wanting to have maple11 convert a point, example(x,y,z), from one system to another among the rectangular, cylindrical, spherical coordinate systems. does anyone know how to do this. I am a new user of maple, so please explain step by step or show an example. Thanks

## How do I find a fraction that is close to - but si...

I saw a function in Maple that would take a fraction like 77/45 and come up with a simpler version that was close to that value. In this case 9/5. Now I can't remember what that function was called and where to find it. Anybody seen this? Thanks!!

## How do I denote algebraic extension fields, K? Is ...

The command root(f(x),x, K) to compute roots of a univariate polynomial f(x), (let f(x) have integer coefficients), will not return an answer unless *I* do the WORK FIRST of FINDING THE ROOT to determine over WHICH FIELD (algebraic field, if it's algebraic) some of the roots of f(x) lie. The help manual demonstrates this with simple quadratics only. One writes the radical part of the quadratic solution for K, i.e. root(x^2-3,x,3^(1/2)) Mathematica had the complete Cardano formulae programmed in for both the cubic and the quartic polynomials with completely indeterminate coefficients.

## Vector and scalar projections?...

Hey I am totally clueless on how to go about finding the vector projection of b on a and the scalar projection of b on a. a:= [0,-8,4] b:= [7,6,-20] please help! thanks

## Irreducibility test for polynomials over Fp...

Hello everyone, I need some help with this one: I need to write a routine that tests the irreducibility of a polynomial over the field Fp , where p is a prime. It should return TRUE if the polynomial is irreducible over Fp and FALSE if it's not. I can use the theorem below: The polynomial x^(p^n)-x is the product of all monic irreduble polynomials over Fp, of degree that divides n. So, any ideas? Thanks in advance for your time!

## ODE system difficulties...

Hello all, you were very helpful the last time I had a question, I hope you can help me again here. I have a system of differential equations that can be manipulated in two way, each has its own problems 1) I can define the system of equations including a piecewise function. The test of the piecewise involves the ratio st(t)/sz(t) being relative to 1. When I attempt to dsolve,numeric this formalism it gives me an error that it cannot convert to an explicit first-order system (not that I asked it to convert by the way). 2) In place of the piecewise I can have int(1/(1+sqrt(st(t)/sz(t))*sin(theta)),theta=0..Pi) which should evaluate to a real number, and is incidentally where the piecewise function comes from. However then dsolve tells me that it cannot have an integral in a differential equation.

## Multicast Routing Algorithm...

Hi; I am Abdul-Kareem from Iraq. I have BSc in computer since and BSc in electrical engineering. Now I am student in computer engineering to get MSc degree in Information Technology engineering. My research is "Design and Implementation a Multicast Routing Algorithm for a Network". Please I need more information about my research and the related topics. Thank you . Best regards. Abdul-Kareem

## Maple 11 will not run because of an invalid or mis...

I'm a new mac owner and for a course i need to download and use Maple 11. So I installed it and opened it...andrun for 15 seconds but then a warning will pop up saying Maple Initialization Error and then "invalid or missing license file" followed by computer jargon i can't even understand. I've looked at Maple and Mac support sites alike to no avail. I suspect it had something to do with my firewall, in which case i'd be grateful for so direction on how to correct it. Thank you for your time. sincerely your friendly Maple 11 (would be) user