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Talence, France

Deshayes Y.,IMS Bordeaux Labs | Baillot R.,IMS Bordeaux Labs | Rehioui O.,IMS Bordeaux Labs | Bechou L.,IMS Bordeaux Labs | And 2 more authors.
IEEE Transactions on Device and Materials Reliability

Degradation of packaged light-emitting diodes (LEDs) under gamma irradiations has been investigated using usual electro-optical characterizations. Failure mechanisms have been revealed by an accurate degradation model taking into account the Stark effect in electroluminescence spectrum and piezoelectric field in the active zone. Gamma irradiations have induced an additional mechanical stress close to 0.25 MPa in the active layer resulting from the change of the polymer mechanical properties used on the LED package. © 2011 IEEE. Source

Zolghadri M.,IMS Bordeaux Labs | Amrani A.,IMS Bordeaux Labs | Zouggar S.,IMS Bordeaux Labs | Girard P.,IMS Bordeaux Labs
International Journal of Computer Integrated Manufacturing

In new product development (NPD) projects, various partners may be involved at different phases and their participation can lead to either success or failure of the project. Therefore, a company that launches an NPD project has to carefully select the most appropriate partners. Currently, partner selection in supply chains is often performed according to well-known criteria such as cost, delay and quality. However, problems could emerge in such processes due to the unavoidable power disequilibrium of the parties involved. The strongest party will sooner or later force the weaker ones to accept more challenging constraints. The use and abuse of power will lead to doubtless mistrust and frustration. Therefore, the awareness of the suppliers' power before any collaboration is of upmost importance and in realistic situations, it should be used as a high-level selection criterion. This article argues that the power of partners represents a significant issue for the achievement of a coherent supplier selection strategy. An innovative method is suggested to assess the power of each potential partner based on its performances. The joint use of a power-based selection approach and a performance-based selection approach is illustrated at the end of the article. This study demonstrates how power consideration can help decision makers in selecting more relevant partners. © 2011 Taylor & Francis. Source

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