Charged particle activation studies on the surface of LDEF spacecraft

High energy proton induced nuclear reaction products are examined using seven elements, namely, Aluminum, Silicon, Nickel, Copper, Zirconium, Tantalum, and Tungsten. The samples were in the form of plates, 2 x 2 x 1/8 inches. Activities due to Na-22 from Al, Co-56 and Co-57 from Ni, Co-58 from Cu, and Y-88 from Zr targets were detected. No induced activity was observed in Si, Ta, and W, most probably due to the long cooling times. Only the Zr sample contained a weak Be-7 peak, although Ta and W were also located at the leading edge of the spacecraft. Gamma-rays of individual isotopes were measured using high-resolution Ge(Li) solid state detector coupled to 4096-multichannel analyzer. Activities were calculated for Co-56 (846 keV) and Co-57 (122 and 136 keV's) at the time of the entry of the spacecraft and found to be 0.014 plus or minus 0.005 c/sec. g, 0.018 plus or minus 0.002 c/sec. g, and 0.0024 plus or minus 0.0007 c/sec. g, respectively

Conflicts of Interest in the Structure of REITs

When the surge of equity REIT initial public offerings (IPOs) came to market in 1993 and 1994, the quality as well as an obvious increase in the quantity of newly securitized real estate (approximately $15.1 billion in the first two years of this bull market), defined a new REIT marketplace. By the end of 1995, the implied market capitalization of equity REITs had reached$59 billion, fourfold its size in 1992, and these real estate companies controlled approximately $83 billion in real estate

The Political Fabric of Design Competitions

Design competitions are commissioned for many reasons, almost none of which have to do with design and all of which have to do with political motivations. A political agenda always presides over the important but ancillary search for new design possibilities, innovative solutions, or a compelling architectural or urban vision. Though political agendas vary quite a lot, they are lodged in the fundamental need to create or cultivate a strong constituency and garner the necessary resources to advance a desired project

Walls Have Ears but They Also Speak –A comparative study of two playgrounds

Senior Project submitted to The Division of Arts of Bard College

Measuring Real Estate Returns When the City Acts as an Investor: Boston and Faneuil Hall Marketplace

The financial payback to the City of Boston from the development of Faneuil Hall Marketplace provides a starting point for analyzing the benefits of public-private downtown project development deals