University of Colorado Boulder

About: University of Colorado Boulder is a education organization based out in Boulder, Colorado, United States. It is known for research contribution in the topics: Population & Galaxy. The organization has 48794 authors who have published 115151 publications receiving 5387328 citations. The organization is also known as: CU Boulder & UCB.

The Development of the Joint NASA GSFC and the National Imagery and Mapping Agency (NIMA) Geopotential Model EGM96

Abstract: The NASA Goddard Space Flight Center (GSFC), the National Imagery and Mapping Agency (NIMA), and The Ohio State University (OSU) have collaborated to develop an improved spherical harmonic model of the Earth's gravitational potential to degree 360. The new model, Earth Gravitational Model 1996 (EGM96), incorporates improved surface gravity data, altimeter-derived gravity anomalies from ERS-1 and from the GEOSAT Geodetic Mission (GM), extensive satellite tracking data-including new data from Satellite Laser Ranging (SLR), the Global Postioning System (GPS), NASA's Tracking and Data Relay Satellite System (TDRSS), the French DORIS system, and the US Navy TRANET Doppler tracking system-as well as direct altimeter ranges from TOPEX/POSEIDON (T/P), ERS-1, and GEOSAT. The final solution blends a low-degree combination model to degree 70, a block-diagonal solution from degree 71 to 359, and a quadrature solution at degree 360. The model was used to compute geoid undulations accurate to better than one meter (with the exception of areas void of dense and accurate surface gravity data) and realize WGS84 as a true three-dimensional reference system. Additional results from the EGM96 solution include models of the dynamic ocean topography to degree 20 from T/P and ERS-1 together, and GEOSAT separately, and improved orbit determination for Earth-orbiting satellites.

Downsizing: What do we know? What have we learned?

Abstract: Executive Overview Downsizing, the planned elimination of positions or jobs, is a phenomenon that has affected hundreds of companies and millions of workers since the late 1980s. While there is no shortage of articles on “How To” or “How Not To” downsize, the current article attempts to synthesize what is known in terms of the economic and organizational consequences of downsizing. We argue that in many firms anticipated economic benefits fail to materialize, for example, lower expense ratios, higher profits, increased return-on-investment, and boosted stock prices. Likewise, many anticipated organizational benefits do not develop, such as lower overhead, smoother communications, greater entrepreneurship, and increases in productivity. To a large extent, this is a result of a failure to break out of the traditional approach to organization design and management—an approach founded on the principles of command, control, and compartmentalization. For long-term. sustained improvements in efficiency, reductio...