Fairly-Secure Anti-SPAM Gateway Using OpenBSD, Postfix, Amavisd-new, SpamAssassin, Razor and DCC

Nice tutorial to build Anti Spam Gateway in OpenBSD.

This document describes how to setup a spam-blocking email gateway based on open source and freely available software. This procedure is designed for a small to medium sized company. It describes how to setup a new computer that is meant to run on your network's DMZ in between the Internet and a corporate email server like Lotus Notes or Microsoft Exchange.

The tutorial uses the following software:
Operating System: OpenBSD
MTA: Postfix
MailScanner & Antivirus: Amavisd-new, SpamAssassin, Razor and DCC

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Solving Nonlinear Schrödinger Equation using Split Step Fourier Method

Finish the assignment of Optical Fiber Communication. The topic was “Solving Nonlinear Schrödinger Equation using Split Step Fourier Method”. The program shows the nonlinear characteristics of light when it progapates through the optical fiber. The code is written in MatLab, version 6.5.1.

I got this doc in internet. Hope this doc will help others to understand about Nonlinear Schrödinger Equation.

Solving Nonlinear Schrödinger Equation using Split Step Fourier Method [pdf file]

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