منابع مشابه
Reaching across the border with the SBRP.
The border between Mexico and the United States is an artificial line dividing a geographical region that is otherwise ecologically, economically, and culturally integrated. Despite its artificiality, the border between Mexico and the United States strongly affects the way environmental and human health problems are addressed in the region where these two nations meet. Historically, relations b...
متن کاملReaching Across the Pond: Extending a Regional Innovation Ecosystem Strategy
The Georgia Institute of Technology has been a catalyst for economic growth in the Southeast United States since its founding in 1885. Over the past 30 years, it has become known as one of the top technological universities in the world. As part of a strategic planning effort in mid2009, it sought to strengthen its thought leadership and impact through the implementation of a global innovation ...
متن کاملReaching the betz limit experimentally and numerically
The Betz theory expresses that no horizontal axis wind turbine can extract more than 16/27 (59.3%) of the kinetic energy of the wind. The factor 16/27 (0.593) is known as the Betz limit. Horizontal Axis wind turbine designers try to improve the power performance to reach the Betz limit. Modern operational wind turbines achieve at peak 75% to 80% of the Betz limit. In 1919, Albert Betz used an a...
متن کاملThe Void Phenomenon
Advances in theoretical ideas on how galaxies formed have not been strongly influenced by the advances in observations of what might be in the voids between the concentrations of ordinary optically selected galaxies. The theory and observations are maturing, and the search for a reconciliation offers a promising opportunity to improve our understanding of cosmic evolution. I comment on the deve...
متن کاملThe Void Phenomenon Explained
We use high-resolution N-body simulations, combined with a halo occupation model of galaxy bias, to investigate voids in the galaxy distribution. Our goal is to address the “void phenomenon” of Peebles (2001), which presents the observed dearth of faint galaxies in voids as a challenge to the current cosmology. In our model, galaxy luminosity is determined only as a function of dark matter halo...
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ژورنال
عنوان ژورنال: Academic Medicine
سال: 1970
ISSN: 1040-2446
DOI: 10.1097/00001888-197001000-00010