On the macro scale, feedback control is routinely applied to improve performance and enable new tasks in complex and uncertain systems operating in noisy environments. Our lab has focused on applying feedback control ideas to systems on the micro scale. Here we show how control methods can improve existing performance in the UCLA lab-on-a-chip electrowetting system and can create entirely new capabilities in our 'micro fluidic tweezers' cell steering devices.In the Electro-Wetting-On-Dielectric (EWOD) system developed at UCLA by CJ Kim, a grid ....etc

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Over the last decade, particle tracking microrheology has matured as a new tool for complex fluids research. The main advantages of microrheology over traditional macroscopic rheometry are: the required sample size is extremely small (~ 1 mL); local viscoelastic properties in a sample can be probed with high spatial resolution (~1-10 mm); and the sample is not disturbed by moving rheometer parts. I will present two examples of recent work in my group that highlight how these characteristics can be exploited to acquire unique information about t ....etc

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MODELING & AUTOMATED CONTAINMENT OF WORMS
Abstract: Self-propagating codes, called worms, such as Code Red, Nimda, and Slammer, have drawn significant attention due to their enormously adverse impact on the Internet. Thus, there is great interest in the research community in modeling the spread of worms and in providing adequate defense mechanisms against them. In this paper, we present a (stochastic) branching process model for characterizing the propagation of Internet worms. The model is developed for uniform scanning worms and then extende ....etc

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Definition

The Unified Modeling Language (UML) is a standard language for specifying, visualizing, constructing, and documenting the artifacts of software systems, as well as for business modeling and other non-software systems. The UML represents a collection of best engineering practices that have proven successful in the modeling of large and complex systems. The UML is a very important part of developing object oriented software and the software development process. The UML uses mostly graphical notations to express the design of softwar ....etc

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Important two-phase fluid mechanics problems that are dominated or significantly affected by capillary effects are not oddities but rather daily events in our lives. Seemingly unrelated topics such as the economics of satellite television and pulmonary health and safety research share capillary fluids physics. Current and future miniaturized two-phase heat transfer loops and fuel cells possess similar concerns. This seminar presents research in a number of capillary fluids topics on Earth and in orbit. An energy method code, Surface Evolver, is ....etc

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The primary objective of a design engineer is to ensure a safe, efficient design of equipment to carry out a process. This needs a good understanding of the various processes occurring in the system. The operation of the equipment under varying operating conditions must be analyzed since any process is prone to disturbances. This needs a model which captures all interactions. Such a model can be used for nonlinear analysis and to subsequently develop control strategies and optimize plant operation. The steady state and dynamic behavior is predi ....etc

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Modeling Mechanical Systems using Virtual Test Bed

Mechanical Modeling in VTB
VTB can be used to model mechanical systems. Equivalent electro-mechanical systems”both linear and rotational”can be described using VTB™s across and through variables.

Internal Combustion Engine (ICE) Valve Train Modeling using VTB
A new camless engine is being design in conjunction with AARG, Siemens, and Honda.
A model was built to show valve train component position, velocity, and acceleration.
Belo ....etc

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The Need to Forecast

When the result of an action is of consequence, but cannot be known in advance with precision, forecasting may reduce decision risk by supplying additional information about the possible outcome. The potential benefit of forecasting lies in the realm of decision making to exert control over some process. To be able to look into future is always a question in mind of decision makers. Calculating the likely value of a variable or its likely behavior are important outcomes of fore ....etc

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Although grinding is considered one of the more established manufacturing processes, it is still relatively poorly understood. In particular, the interaction of the wheel with the workpiece at times seems more like an art than a science. In this presentation, a 3-D topographic measurement approach which encompasses both the wheel and the workpiece will be presented. The topographic information obtained from the wheel will be applied to a model to predict the workpiece surface generated which will then be verified by experimentation. The prelimi ....etc

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Application System Modeling Data Modeling through ER Model
Context Level Diagram
Data Flow Diagram
1. It is a graphical tool for designing systems ,input ,process and output.
2. It represents flow of data through system.
3. It shows the processes ,data stores ,sources & destination entities .
4. The transformation of data from input to output through process is described logically.
5. The top level diagram is called context diagram. It contains single process .It gives a broad overview of the system under ....etc

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