The Jefferson Medical College of Philadelphia: From 1825 to 1908

This brief 1908 history of Jefferson Medical College was written by James W. Holland. An 1868 graduate, Holland went on to become the Dean of Jefferson Medical College in 1887https://jdc.jefferson.edu/jeffersonhistorybooks/1007/thumbnail.jp

EQUALIZATION ASPECTS OF FEDERAL AID TO EDUCATION: THE DISTRICT PERSPECTIVE

Public Economics,

Monte Carlo for Robust Regression: The Swindle Unmasked

This paper gives an alternative derivation of a Monte Carlo method that has been used to study robust estimators. Extensions of the technique to the regression case are also considered and some computational points are briefly mentioned.

Skylab 2: Photographic index and scene identification

A quick reference guide to the photographic imagery obtained on Skylab 2 is presented. Place names and descriptors used give sufficient information to identify frames for discussion purposes and are not intended to be used for ground nadir or geographic coverage purposes. The photographs are further identified with respect to the type of camera used in taking the pictures

The conjugacy problem and related problems in lattice-ordered groups

We study, from a constructive computational point of view, the techniques used to solve the conjugacy problem in the "generic" lattice-ordered group Aut(R) of order automorphisms of the real line. We use these techniques in order to show that for each choice of parameters f,g in Aut(R), the equation xfx=g is effectively solvable in Aut(R).Comment: Small update

The Economic Impact of a Possible Irrigation-Water Shortage in Odessa Sub-Basin of Adams and Lincoln Counties

The Columbia Basin Project (CBP) was one of the single largest projects undertaken by the Bureau of Reclamation. The venture, which started in the 1930s in Central Washington, did not entirely turn out as expected. In fact, almost half of the proposed irrigable area, located mainly in the north eastern portion of the original plan, doesn’t have any water supply from the project for irrigation purposes. The Odessa Sub-area is one of those areas. The land in this area is fertile and produces very high quality potatoes. Over the last couple of decades, production in this Odessa sub-region has been possible primarily because of irrigation based on deep wells. However, the underground water is drawing down and crop production may shut down as a result. Therefore, an economic threat on the economy of the Columbia Basin is in the offing, unless alternative water sources are negotiated. In this paper, we will mainly explore the regional economic impacts of the possible production losses of crops produced in the Odessa Sub-area of Lincoln and Adams Counties. In Section A, we briefly discuss the current status of the Columbia Basin Project. In Section B, we discuss ground water level decline issues. In Section C, we enumerate the economic impacts of a possible reduction in crop production in Odessa Subregions of Adams and Lincoln Counties. Summary and conclusions are in the final section.Irrigation water shortage, Idessa sub-basin, Economic Impact,

OUTPUT CHANGE IN U.S. AGRICULTURE: AN INPUT-OUTPUT ANALYSIS

This paper analyzes output changes in the U.S. agricultural economy from 1972 to 1977 using a 477-sector input-output framework. The empirical model is based on benchmark input-output data from the U.S. Bureau of Economic analysis for 1972 and 1977. Output changes were decomposed into components attributable to technical change, domestic final demand change, export demand change and import substitution. A major advantage of the decomposition is its ability to identify the output change in a given sector due to general equilibrium effects in all sectors.Import substitution, Input-output, Output change, Technical change, Production Economics,

NATURAL RESOURCE SUPPLY CONSTRAINTS AND REGIONAL ECONOMIC ANALYSIS: A COMPUTABLE GENERAL EQUILIBRIUM APPROACH

A computable general equilibrium model is used to estimate the impact a resource supply constraint, that restricts federal timber harvest, has on a timber dependent region. Impacts are compared to impacts generated from an input-output mode and indicate an upward bias in estimated income and employment losses using IO methods.Resource /Energy Economics and Policy,

New evidence for a dramatic rise in atmosphere oxygen ca. 1,900 m.y. ago

Several lines of geologic evidence have pointed to a significant increase in P sub O2 about 2,000 m.y. ago, but the magnitude of P sub O2 before and after that time has been quite uncertain. The data that we have recently accumulated suggest that P sub O2 was approximately less than 2 x 10 (exp -3) atm more than 2,000 m.y. ago, and approximately greater than 0.03 atm more recently than ca. 1,900 m.y. ago. These estimates are based on the behavior of iron in Precambrian weathering horizons. More than ca. 2,000 m.y. ago, Fe(+2), released during the weathering of basalts was not oxidized to Fe(+3), and was removed in ground water from the upper layers of soil horizons. More recently than ca. 1,850 m.y. ago, Fe(+2) was oxidized to Fe(+3) and precipitated as iron oxides and hydroxides in such soil horizons and in the weathering products of a carbonate facies banded iron formation in Griqualand West, South Africa. The O2 content of the atmosphere must have increased dramatically about 1,900 m.y. ago to explain these observations. The reasons for the increase are still obscure, but are probably related to changes in the biologic productivity of the oceans. Eukaryotes appear to have developed shortly after the increase in P sub O2, perhaps in response to the subsequent increase in the supply of nitrate from the atmosphere to the oceans