Mustapha Rafaf

ULTRA VIOLET DETECTION SENSORS

This article presents an innovative and creative approach to detect harmful level of Ultra Violet light on human skin. Different commercial UV sensors are evaluated for comparison. The comparison is made for performance, cost and dimension. The proposed affordable UV sensor solutions are presented using chemical and MEMS/MOEMS technologies. The UV dynamic sensor detects the harmful level of UV and informs the user about the eventual UV radiation risk. The proposed two solutions consider chemical material for UV detection and different actuation mechanism to inform the UV harmful level to the user. These sensors are non disposable and are packaged for visual monitoring (without battery) and acoustic operation (using a battery).

Intelligent sensors for ultra violet detection

This paper presents an innovative, simple and creative approach to detect harmful level of ultra violet light on human skin. The harmful level of ultra violet rays is first defined with the existing harmful level standards identified by governmental and medical authorities, and then different existing detection mechanisms or apparatus are evaluated. Finally proposed affordable solutions and Matlab/Femlab simulations for personal UV sensor are presented using MEMS/MOEMS or chemical technology. This intelligent dynamic sensor detects the harmful level of UV and dynamically informs the user about the need of some kind of protection against the high UV radiation levels. The criteria for the choice of solutions are based on low cost, practical and reconfigurable wear, response time, non disposable, autonomous operation (visual-no battery) and handicap dependant operation (acoustic-with battery). Packaging of these devices would need to respect the above criteria.

Infrastructure for the design and fabrication of MEMS for RF/microwave and millimeter wave applications

This article describes and provides valuable information for companies and universities with strategies to start fabricating MEMS for RF/Microwave and millimeter wave applications. The present work shows the infrastructure developed for RF/Microwave and millimeter wave MEMS platforms, which helps the identification, evaluation and selection of design tools and fabrication foundries taking into account packaging and testing. The selected and implemented simple infrastructure models, based on surface and bulk micromachining, yield inexpensive and innovative approaches for distributed choices of MEMS operating tools. With different educational or industrial institution needs, these models may be modified for specific resource changes using a careful analyzed iteration process. The inputs of the project are evaluation selection criteria and information sources such as financial, technical, availability, accessibility, simplicity, versatility and practical considerations. The outputs of the project are the selection of different MEMS design tools or software (solid modeling, electrostatic/electromagnetic and others, compatible with existing standard RF/Microwave design tools) and different MEMS manufacturing foundries. Typical RF/Microwave and millimeter wave MEMS solutions are introduced on the platform during the evaluation and development phases of the project for the validation of realistic results and operational decision making choices. The encountered challenges during the investigation and the development steps are identified and the dynamic behavior of the infrastructure is emphasized. The inputs (resources) and the outputs (demonstrated solutions) are presented in tables and flow chart mode diagrams.