Home About us Contact
|
Home About us Contact | ||
|
|
||
Electronic Equipment (electronic + equipment)
Selected AbstractsIndustry responses to EU WEEE and ROHS Directives: perspectives from ChinaCORPORATE SOCIAL RESPONSIBILITY AND ENVIRONMENTAL MANAGEMENT, Issue 5 2006Jieqiong Yu Abstract The electrical and electronics (EE) industry has come under increasing pressure to adopt extended producer responsibility (EPR) policies through the introduction of the European Union's Directives on Waste Electrical and Electronic Equipment (WEEE) and the Restriction of Use of Certain Hazardous Substances (ROHS). Based on the findings of 50 questionnaires and in-depth interviews with China's EE manufacturers, this paper investigates the perception of and readiness of companies for implementation of WEEE and ROHS in China. It identifies key difficulties encountered by manufacturers in fulfilling the requirements and evaluates the effectiveness of these two directives in promoting environmental reform. The findings indicate that the extent of companies' responses largely depends on their market structure and client requirements. Supply chain management, raw material testing and cost implications appear to be key challenges in addressing issues surrounding the directives. There is little evidence to suggest that these directives have effectively driven China's EE manufacturers towards systematic eco-design. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment. [source] Environmental issues related to end-of-life options of plastics containing brominated flame retardantsFIRE AND MATERIALS, Issue 5 2004Lein Tange Abstract Bromine is used as the building block for some of the most effective flame retarding agents available to the plastics industry today. They are used to protect against the risk of accidental fires in a wide range of Electrical and Electronic Equipment (EEE). Brominated flame retardants (BFRs), as all flame retardants, act to decrease the risk of fire by increasing the fire resistance of the materials in which they are applied. There is a perception that BFRs affect adversely the end-of-life management of plastics through formation of Polybrominated Dibenzo Dioxins and Dibenzo Furans (PBDD/F). In fact, there exists a wide range of data and practical experience demonstrating that the end-of-life management of plastics containing BFRs is fully compliant with legislation setting the strictest limit values for PBDD/F and is fully compatible with an integrated waste management concept. Copyright © 2004 John Wiley & Sons, Ltd. [source] Suppression of electromagnetic radiation noise from wireless modules in the millimeter-wave band by means of alumina containing carbon blackELECTRONICS & COMMUNICATIONS IN JAPAN, Issue 10 2010Yasuharu Takase Abstract Unwanted electromagnetic (EM) radiation generated from wireless modules in the millimeter-wave band used for car radar creates errors and results in performance degradation of electronic equipment. In this paper, to reduce these unwanted EM waves, an optimal design to add the function of EM wave absorption to the lid for the module is examined. Alumina-containing carbon black is used as a wave absorption material for the lid. Absorption of 20 dB or more is obtained as a measured result with the cover added for EM wave absorption at 60 GHz. The wireless module was also analyzed in the millimeter-wave band with the designed material used for the lid. The radiation and the reflection of electric power were greatly reduced by the loss electric power from the lid. Therefore, effective data for suppressing unwanted EM radiation noise from wireless modules in the millimeter-wave band can be provided. © 2010 Wiley Periodicals, Inc. Electron Comm Jpn, 93(10): 25,33, 2010; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10216 3 [source] Development of a Direct Alcohol Alkaline Fuel Cell StackFUEL CELLS, Issue 4 2010D. Gaurava Abstract Direct alcohol alkaline fuel cells (DAAFC) are one of the potential fuel cell types in the category of low temperature fuel cells, which could become an energy source for portable electronic equipment in future. In the present study, a simple DAAFC stack has been developed and studied to evaluate the maximum performance for a given fuel (methanol or ethanol) and electrolyte (KOH) at various concentrations and temperatures. The open circuit voltage of the stack of four cells was nearly 4.0,V. A particular combination, 2,M fuel (methanol or ethanol) and 3,M KOH, results in maximum power density of the stack. The maximum power density obtained from the DAAFC stack (25,°C) was 50,mW,cm,2 at 20,mA,cm,2 for methanol and 17,mA,cm,2 for ethanol. The stack power density corroborated with that obtained from a single cell, indicating there was no further loss in the stack. [source] Cover Picture , Mol.MOLECULAR NUTRITION & FOOD RESEARCH (FORMERLY NAHRUNG/FOOD), Issue 2 2008Nutr. Used to flameproof electronic equipment, brominated flame retardants (BFRs) also escape into the environment where they accumulate in organisms. Although consumption of fatty fish is recommended because of the healthy effects of the omega-3 fatty acids, there has been little information on the possible protective effects of the omega-3 fatty acids in relation to contaminants. This Special Issue of Molecular Nutrition & Food Research gives an up-to-date overview of the current state of the science dealing with the occurrence and possible health effects of BFRs in food. [source] Thermal degradation of a brominated bisphenol a derivativePOLYMERS FOR ADVANCED TECHNOLOGIES, Issue 11-12 2003M. P. Luda Abstract The thermal degradation of 2,6,2,,6,,tetrabromo-4,4,-isopropylidene-di phenol (tetrabromobisphenol A) (TBBPA) has been investigated and a mechanism for its thermal degradation is suggested. TBBPA is a comonomer widely used in epoxy and in unsaturated polyester resins to impart fire retardance. These resins find a common use in electric and electronic equipment. The presence of bromine atoms is the key factor in fire retardant activity, while on the other hand it represents an ecological problem when pyrolytic recycling is programmed at the end of the useful life of such items. However, pyrolysis is the more advantageous recycling system for thermosetting resins and thus efforts should be made to control the pyrolysis in order to avoid or minimize the development of toxics. Homolytic scission of the aromatic bromine and condensation of aromatic bromine with phenolic hydroxyl are the main processes occurring in the range 270,340°C. A large amount of charred residue is left as a consequence of condensation reactions. HBr and brominated phenols and bisphenols are the main volatile products formed. Brominated dibenzodioxins structures are included in the charred residue and not evolved in the volatile phases. Copyright © 2003 John Wiley & Sons, Ltd. [source] The application of neural networks to predict abnormal stock returns using insider trading dataAPPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, Issue 4 2002Alan M. Safer Abstract Until now, data mining statistical techniques have not been used to improve the prediction of abnormal stock returns using insider trading data. Consequently, an investigation using neural network analysis was initiated. The research covered 343 companies for a period of 4½ years. Study findings revealed that the prediction of abnormal returns could be enhanced in the following ways: (1) extending the time of the future forecast up to 1 year; (2) increasing the period of back aggregated data; (3) narrowing the assessment to certain industries such as electronic equipment and business services and (4) focusing on small and midsize rather than large companies. Copyright © 2002 John Wiley & Sons, Ltd. [source] | ||||||||||