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1 – 5 of 5J.C. Lesho, B.M. Romenesko and A.F. Hogrefe
JHU/APL has developed and tested ingestible pills that telemeter core body temperature. The hybrids were manufactured as chip and wire on thick film ceramic substrates and surface…
Abstract
JHU/APL has developed and tested ingestible pills that telemeter core body temperature. The hybrids were manufactured as chip and wire on thick film ceramic substrates and surface mount on polyimide boards. The devices have potential applications for divers, astronauts, soldiers in combat, people working in hazardous conditions and people with hypothermia and hyperthermia. Descriptions of both circuit operation and packaging techniques are included.
Neal K. Vail, Badrinarayan Balasubramanian, Joel W. Barlow and Harris L. Marcus
Reports that measurable amounts of polymer degradation occur during the fabrication of objects from polymer coated ceramic powders by selective laser sintering (SLS). Argues that…
Abstract
Reports that measurable amounts of polymer degradation occur during the fabrication of objects from polymer coated ceramic powders by selective laser sintering (SLS). Argues that because the binder is important in achieving strong green parts that can be handled with minimal breakage during post‐processing operations, it is essential to minimize the extent of binder losses. As the first step towards understanding the mechanisms of binder degradation, this paper presents a thermal model of the physical system, noting that the agreement between theory and experiment are good. The model is used to help determine the most influential parameters affecting binder losses during fabrication from polymer coated powders. Predicts that adjustments to laser beam diameter, laser scanning distance and gaseous environment will strongly affect polymer binder degradation during processing. Further predicts correctly that polymer degradation during SLS processing is not sensitive to the inherent degradation kinetics of the polymer.
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Sandra L. Harris, Sandra Jackson Wright and Clementine Msengi
The history of the African American woman in the United States can be described as a struggle for survival and identity within a tripartite of oppression that includes racism…
Abstract
The history of the African American woman in the United States can be described as a struggle for survival and identity within a tripartite of oppression that includes racism, classism, and sexism [Hudson-Weems, C. (1989). The tripartite plight of African American women as reflected in the novels of Hurston and Walker. Journal of Black Studies, 20, 192–207.]. In spite of these challenges, African American women have always considered education an important investment in the future [Gregory, S. T. (1995). Black women in the academy. New York, NY: University Press of American, Inc.)], and despite gender and racial stereotyping that have limited educational opportunities African American females have been inspired to become educators (McFarlin, Crittenden, & Ebbers, 1999). Although African American women are underrepresented in higher educational leadership roles (Ross & Green, 2000; Waring, 2003), little research exploring the development of women leaders in academia, as well of that of existing university presidents, is available (Madsen, 2007). The purpose of this chapter is to explore the career paths of African American university women presidents. This research has important implications to strengthen opportunities to attain these important leadership roles in higher education institutions.