3,436 research outputs found
Pediatric Kennedy Terminal Ulcer
Photograph of Fossett's circus loads, 2 AEC Matadors - KKN412 - and trailers, taken Forest site, 28 September 1959 whole side view
Financial intermediation and the role of price discrimination in a two-tier market
Though unambiguously outperforming all other financial markets in terms of liquidity, foreign exchange trading is still performed in opaque and decentralized markets. In particular, the two-tier market structure consisting of a customer segment and an interdealer segment to which only market makers have access gives rise to the possibility of price discrimination. We provide a theoretical foreign exchange pricing model that accounts for market power considerations and analyze a database of the trades of a German market maker and his cross section of end-user customers. We find that the market maker generally exerts low bargaining power vis-á-vis his customers. The dealer earns lower average spreads on trades with financial customers than commercial customers, even though the former are perceived to convey exchange-rate-relevant information. From this perspective, it appears that market makers provide interdealer market liquidity to end-user customers with cross-sectionally differing spreads. --foreign exchange,market microstructure,pricing behavior
Thermoluminescence fading studies: Implications for long-duration space measurements in Low Earth Orbit
Within a 1.5 year comprehensive fading experiment several batches of
LiF:Mg,Ti and LiF:Mg,Cu,P thermoluminescence detectors (TLDs) were studied. The
TLDs originated from two manufacturers and were processed by three laboratories
using different annealing and readout conditions. The TLDs were irradiated with
two radiation modalities (gamma-rays and thermal neutrons) and were stored at
two temperatures (-17.4C and +18.5C). The goal of the experiment was to verify
the stability of TLDs in the context of their application in long-term
measurements in space. The results revealed that the response of all TLDs is
stable within 10% for the studied temperature range. No influence of the
radiation type was found. These results indicate that for the properly
oven-annealed LiF TLDs, fading is not a significant problem, even for measuring
periods longer than a year
Translations and dynamics
We analyze the role played by local translational symmetry in the context of
gauge theories of fundamental interactions. Translational connections and
fields are introduced, with special attention being paid to their universal
coupling to other variables, as well as to their contributions to field
equations and to conserved quantities.Comment: 22 Revtex pages, no figures. Published version with minor correction
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