A V-grooved AlGaAs/GaAs passivated PN junction

A passivated, V-grooved GaAs solar cell offers important advantages in terms of improved optical coupling, higher short circuit current, and increased tolerance to particle radiation when compared to the planar cell configuration. An AlGaAs epilayer has been deposited on a p-type GaAs epilayer grown on an n-type V-grooved GaAs surface using MOCVD. A wet chemical etching process was used to produce a V-pattern with a 7.0 micron periodicity. Reflectivity measurements substantiate the expected decrease in solar reflectance. Scanning electron microscopy techniques were used to confirm the presence of the AlGaAs layer and verify the existence of a pn junction

Design strategies for the International Space University's variable gravity research facility

A variable gravity research facility named 'Newton' was designed by 58 students from 13 countries at the International Space University's 1989 summer session at the Universite Louis Pasteur, Strasbourge, France. The project was comprehensive in scope, including a political and legal foundation for international cooperation, development and financing; technical, science and engineering issues; architectural design; plausible schedules; and operations, crew issues and maintenance. Since log-term exposure to zero gravity is known to be harmful to the human body, the main goal was to design a unique variable gravity research facility which would find a practical solution to this problem, permitting a manned mission to Mars. The facility would not duplicate other space-based facilities and would provide the flexibility for examining a number of gravity levels, including lunar and Martian gravities. Major design alternatives included a truss versus a tether based system which also involved the question of docking while spinning or despinning to dock. These design issues are described. The relative advantages or disadvantages are discussed, including comments on the necessary research and technology development required for each

Interview with Sheila Burke by Brien Williams

Biographical NoteSheila Burke was born and raised in San Francisco, California. She earned a B.S. in nursing at the University of San Francisco (class of 1973) and a master’s degree in public administration from Harvard University. She started working for Senator Dole in May of 1977 to handle health issues on the Senate Finance Committee. A Democrat from California, she was hired due to her prior experience as a nurse with a hands-on understanding of patient care. She became deputy chief of staff in the leader’s office when Senator Dole became minority leader in 1985 and rose to chief of staff in 1986, remaining in that role for ten years until Dole’s retirement; she served a dual role as secretary of the Senate from January to June of 1995. From 1996-2000, she was executive dean and lecturer in public policy at the John F. Kennedy School of Government at Harvard University. In 2000, she joined the Smithsonian Institution, where she rose to the position of deputy secretary and COO until 2007. At the time of this interview, she was a member of the faculty at the John F. Kennedy School of Government at Harvard University and lecturer at Georgetown University’s Public Policy Institute. She is married and has three children. SummaryInterview includes discussion of: George Mitchell and the Senate Finance Committee; Burke’s interest in working for Dole and how she came to be hired; first impressions of George Mitchell; the relationships between Senators Dole and Mitchell, Burke and Martha Pope; tax battles on the Finance Committee; Mitchell’s approach to legislating; Dole’s transition to leader; balancing Senate staff and leader staff interests; the easy working relationship between Dole and Mitchell as leaders and how that compared with Senator Byrd; health care reform and difficult issues surrounding the debate; the issues that Dole and Mitchell had in common and where they differed; Dole’s and Mitchell’s relationships to the White House; the role of partisanship and values; Burke’s experience of being criticized by conservatives in the Senate and the press; Mitchell’s expressing his sympathy for Burke on the occasion of Senator Packwood’s resignation; Burke’s reaction to Mitchell’s decision to retire; the Dole-Mitchell era in the Senate and how those two leaders maintained one another’s trust, elevated the discourse, and were evenly matched; where the Republican Party of 2009 will look for leadership; and Burke’s wish that Mitchell could return to work on the present attempt at health care reform

COVID Remains 2023

Editor\u27s introduction to Vol. 19, Issue 1 of the Journal of Health Ethic

The International Space University's variable gravity research facility design

A manned mission to Mars will require long travel times between Earth and Mars. However, exposure to long-duration zero gravity is known to be harmful to the human body. Some of the harmful effects are loss of heart and lung capacity, inability to stand upright, muscular weakness and loss of bone calcium. A variable gravity research facility (VGRF) that would be placed in low Earth orbit (LEO) was designed by students of the International Space University 1989 Summer Session held in Strasbourg, France, to provide a testbed for conducting experiments in the life and physical sciences in preparation for a mission to Mars. This design exercise was unique because it addressed all aspects concerning a large space project. The VGRF design was described which was developed by international participants specializing in the following areas: the politics of international cooperation, engineering, architecture, in-space physiology, material and life science experimentation, data communications, business, and management

Remedies for the Obesity Epidemic: Can We Afford Them? Do We Want Them?

This paper challenges readers to consider the ethical principle of beneficence, the moral obligation to act for the benefit of others, in addressing the obesity epidemic. One thought provoking question asked is: are we ready to trade jobs for lives if obesity reduction resulted in a significant revenue loss? Currently, the obesity epidemic is estimated to cost $117 billion annually. Stated differently, this epidemic possibly generates$117 billion annually. Readers are warned that unless drastic, wide sweeping efforts are instigated on a societal scale, the obesity epidemic will win out. This is especially pertinent for children. Epidemiologists have determined that at least one out of every three Caucasian child and one out of every two ethnic minority child born in 2000 and beyond will become diabetic unless as a society we do the right thing in terms of aggressively implementing solutions which we know to be effective in curbing the epidemic. Lastly, 14 governments, policy-oriented remedies are presented and 13 family-related, obesity reduction/prevention remedies are shared. Readers are left with the challenge of deciding if we as a society can afford the remedies and if we really want the remedies. Davis concludes with the reminder that we have a moral obligation to help those, especially children, who suffer for this life threatening epidemic

Ethical Strange Fruit

Editor\u27s introduction to Volume 15, Issue 2 of the Online Journal of Health Ethics

Dedication

This issue is dedicated to all those involved in the battle with COVID-19