This is the second DVD from 2 DVD tutorial series for dynamic expressions in Maya.Through the use of particle expressions,we gain a greater degree of control over particle attributes. This lecture demonstrates how to isolate individual particles and transform them based on user defined criteria. By combining several techniques, such as custom per-particle attributes and ramp-controlled attributes, we can create effects that are impossible otherwise. Random or wave producing funstions such as 'rand' and 'sin' are simple by themselves, but by combining these (and other functions) with conditionals, event and curve functions, we can control not just how particles behave, but when and why.

This is the first DVD from 2 DVD tutorial series for dynamic expressions in Maya.Particle Expressions are a way of using MEL (Maya-Embedded Language) to form and control relationships between particle and object attributes over time. Visual effects animators rely on expressions to create a variety of complex motion and behavior that is impossible to create using other dynamics techniques.This lecture will show you how to tap into the power of expressions and how to generate them. In addition, it will introduce you to different methods for creating and utilizing custom particle attributes for maximum effect.

The first part of the CG Academy series on pflow. I noticed that this was not posted so thought i would post it.
CG Academy - Particle.Flow_01_Principles and Workflow @ cg academy
Now all 5 are on this site.
01_Principles and Workflow (this thread)
02_Operators_01
03_Operators_02
04_Test Forces and Collisions
05_Practical Examples

In this high-level tutorial we will learn how to handle data between ICE clouds and get around many common issues in ICE and Lagoa. The objectives for this fast-pace, intensive course include successfully transferring data between two ICE trees, create custom particle effects and understand how data flows in Softimage. By the end of this training, you will have the ability to solve these types of ICE problems in your own projects. Before following along with this tutorial, you should have experience using Softimage and ICE as we cover what would normally take hours to accomplish in a shorter span of time. If you are an artist new to Softimage, ICE or Lagoa, we have several courses to get you started.

In 3ds Max 2011: Particle Effects , Steve Nelle Shows How to create a Wide Variety of Special Effects Including Particle smoke, water, and Explosions.