Extragalactic Foreground Contamination in Temperature-based CMB Lens Reconstruction

We discuss the effect of unresolved point source contamination on estimates of the CMB lensing potential, from components such as the thermal Sunyaev-Zel'dovich effect, radio point sources, and the Cosmic Infrared Background. We classify the possible trispectra associated with such source populations, and construct estimators for the amplitude and scale-dependence of several of the major trispectra. We show how to propagate analytical models for these source trispectra to biases for lensing. We also construct a "source-hardened" lensing estimator which experiences significantly smaller biases when exposed to unresolved point sources than the standard quadratic lensing estimator. We demonstrate these ideas in practice using the sky simulations of Sehgal et. al., for cosmic-variance limited experiments designed to mimic ACT, SPT, and Planck

Documentation of ice shapes accreted on the main rotor of a UH-1H helicopter in level flight

Icing tests were conducted on a UH-1H helicopter in level flight behind a spray tanker near Duluth, Minnesota, during the winter of 1983-84 as part of the joint NASA/Army HIFT program. On landing, the ice formations on the main rotor were documented by casting a set of ten-inch molds on the blade using a Dow-Corning silicone rubber compound which was initially liquid at sub-freezing temperatures. Such documentation was accomplished for eight flights in which the temperature ranged from -11 C to -22 C and the in-cloud flight times ranged from 5 to 9 minutes

SOCIAL CAPITAL AND RISK RESPONSES

The economic well-being of economic agents is assumed to be interpersonally dependent. The extent of this interpersonal dependency varies according to the strength of relationships, values, and social bonds and is measured using social capital coefficients in a neoclassical model in which agents with stable preferences maximize utility. The model's predictions are tested empirically by asking agents how their willingness to bear a risk is altered when their refusal to accept the risk increases the risk faced by others.Institutional and Behavioral Economics, Risk and Uncertainty,

SOCIAL CAPITAL AND ECONOMIC COOPERATION

The socioeconomic movement is an effort to better explain human behavior by combining insights of economists and sociologists. This paper contributes to the socioeconomic literature by including the influence of relationships, values, and social bonds in the neoclassical economic model by introducing social capital coefficients. The usefulness of the resulting social capital model is demonstrated theoretically in a two-firm cooperative model and tested empirically using data from a survey of students who allocate their time between individual and joint projects.Social capital, Social capital coefficients, Total revenue-equity frontier, Institutional and Behavioral Economics,

Interview with Robert D. Hanson, October 2, 1998

Robert D. Hanson, son of Gettysburg College President Henry W.A. Hanson, was interviewed on October 2, 1998 by Michael J. Birkner & David Hedrick. He discusses his father\u27s presidency, and what it was like to grow up in Gettysburg College\u27s White House. He also describes his experience as a student in the class of 1939--what it was like to be the son of the president as a student, fraternity life, academics, and his service in World War II. Length of Interview: 134 minutes Collection Note: This oral history was selected from the Oral History Collection maintained by Special Collections & College Archives. Transcripts are available for browsing in the Special Collections Reading Room, 4th floor, Musselman Library. GettDigital contains the complete listing of oral histories done from 1978 to the present. To view this list and to access selected digital versions please visit -- http://gettysburg.cdmhost.com/cdm/landingpage/collection/p16274coll

DSIF station schedules

System manages Deep Space Instrumentation Facilities /DSIF/ equipment construction and modification planning. Versatile program applies to such tasks as employee time and task schedules, pay schedules, operations schedules, and plant and equipment procurement, construction, modification or service

Efficiency Costs of Subsidy Rules for Crop Insurance

Participation in federal crop insurance programs has been encouraged through premium subsidies. The current subsidy depends on contract features as well as coverage levels. This type of subsidy rule causes farmers to choose contract designs and coverages that are not efficient for managing risk, in order to capture subsidy. Farmers are found to be as well off with a flat subsidy that is up to 25% less than the value of the current regressive proportional subsidy.crop insurance, futures, risk management, subsidy, Risk and Uncertainty,

IMPACTS OF SOCIAL CAPITAL ON INVESTMENT BEHAVIOR UNDER RISK

Implicit in most applications of the expected utility (EU) model is the assumption that only the decision maker's own income matters. Moreover, studies that estimate risk preferences typically measure how individuals respond to changes in the level and likelihood of having their own income altered (Young). The focus on own income in the EU model is consistent with the assumption most often applied in the neoclassical economic paradigm; namely, that the identity of participants in an economic exchange does not affect the outcome (Telser and Higinbotham).Institutional and Behavioral Economics, Risk and Uncertainty,

Two-way time transfers between NRC/NBS and NRC/USNO via the Hermes (CTS) satellite

At each station the differences were measured between the local UTC seconds pulse and the remote UTC pulse received by satellite. The difference between the readings, if station delays are assumed to be symmetrical, is two times the difference between the clocks at the two ground station sites. Over a 20-minute period, the precision over the satellite is better than 1 ns. The time transfer from NRC to the CRC satellite terminal near Ottawa and from NBS to the Denver HEW terminal was examined

OPTIMAL POST-HARVEST GRAINS STORAGE BY RISK AVERSE FARMERS

Most previous research on post-harvest grain storage by farmers has assumed risk-neutral behavior and/or made restrictive assumptions about underlying price probability distributions. In this study we solve the optimal post-harvest storage problem for a risk averse farmer under more general assumptions about underlying price distributions. The resulting model is applied to Michigan corn farmers and results show that, contrary to the sell all-or-nothing risk-neutral rule, risk averse farmers will spread sales out over the storage season. The optimal pattern for sales by Michigan corn farmers is to sell approximately 50% of corn at harvest in November (a risk-reduction strategy) and approximately 40% in May (a return-enhancing strategy).Crop Production/Industries,