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

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

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 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,

On the uniqueness of paths for spin-0 and spin-1 quantum mechanics

The uniqueness of the Bohmian particle interpretation of the Kemmer equation, which describes massive spin-0 and spin-1 particles, is discussed. Recently the same problem for spin-1/2 was dealt with by Holland. It appears that the uniqueness of boson paths can be enforced under well determined conditions. This in turn fixes the nonrelativistic particle equations of the nonrelativistic Schrodinger equation, which appear to correspond with the original definitions given by de Broglie and Bohm only in the spin-0 case. Similar to the spin-1/2 case, there appears an additional spin-dependent term in the guidance equation in the spin-1 case. We also discuss the ambiguity associated with the introduction of an electromagnetic coupling in the Kemmer theory. We argue that when the minimal coupling is correctly introduced, then the current constructed from the energy-momentum tensor is no longer conserved. Hence this current can not serve as a particle probability four-vector.Comment: 19 pages, no figures, LaTex, shortened version for Phys. Lett.

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,

Acoustic Scattering from Mud Volcanoes and Carbonate Mounts

Submarine mud volcanoes occur in many parts of the world’s oceans and form an aperture for gas and fluidized mud emission from within the earth’s crust. Their characteristics are of considerable interest to the geology, geophysics, geochemistry, and underwater acoustics communities. For the latter, mud volcanoes are of interest in part because they pose a potential source of clutter for active sonar. Close-range (single-interaction) scattering measurements from a mud volcano in the Straits of Sicily show scattering10–15dB above the background. Three hypotheses were examined concerning the scattering mechanism: (1) gas entrained in sediment at/near mud volcano, (2) gas bubbles and/or particulates (emitted) in the water column, (3) the carbonate bio-construction covering the mud volcano edifice. The experimental evidence, including visual, acoustic, and nonacoustic sensors, rules out the second hypothesis (at least during the observation time) and suggests that, for this particular mud volcano the dominant mechanism is associated with carbonate chimneys on the mud volcano. In terms of scattering levels, target strengths of 4–14dB were observed from 800to3600Hz for a monostatic geometry with grazing angles of 3–5°. Similar target strengths were measured for vertically bistatic paths with incident and scattered grazing angles of 3–5° and 33–50°, respectively