The Labor Supply of Nurses and Nursing Assistants in the United States

Health care administrators and public policy makers are currently much concerned with the labor supply of nurses and nursing assistants. Hospitals and nursing homes, complaining of labor shortages, request public assistance to enable them to pay higher wages. Before committing public funds, policy makers want up-to-date estimates of the wage elasticities of labor supply for nurses and nursing assistants. Constructing a framework within which these elasticities can be estimated requires consideration of the nature and possible origins of the reported shortages. Based on annual time-series data for the US, 1988-2002, the study has derived posterior distributions for short- and long-run own wage elasticities of labor supply by Registered Nurses (RN) and nursing aides, orderlies, and attendants (NAOA). This analysis suggests that increased public assistance to health care providers, designed to raise wages, probably would not reduce reported shortages arising from monopsony power but would nonetheless appreciably increase employment of RNs and NAOAs.

Macroeconomic Adjustment and Foreign Trade of Centrally Planned Economies

This empirical study stresses the underlying macroeconomic forces which determine foreign trade flows in CPEs. The general specification includes a planners' demand equation for the volume of imports, a planners' supply equation for the volume of exports, and a rest-of-world demand equation for the export price level. The planners' behavioural equations include variables for activity levels, trade balance constraints, prices, and domestic excess demand. The import price is exogenous. This simultaneous equation model is estimated on annual data from the mid-1950s to the mid-1970s, for Czechoslovakia, the GDR, Hungary, and Poland. Maximum likelihood estimation in a nested hypothesis testing framework allows selection of restricted versions of the general model for each country. Estimated price elasticities accord with the underlying theory, and the excess demand variables perform well.

Synthesis and Evaluation of Small Molecule Inhibitors of Pyruvate Carboxylase

Through structure-based drug design (SBDD), a series of small molecules have been synthesized and evaluated for inhibitory activity against the pyruvate carboxylase (PC) enzyme via two biological assays. The -hydroxycinnamic acid scaffold was identified as the most privileged scaffold for inhibition of PC. Analogues of phenylpyruvic acid were generated and evaluated, leading to the discovery of inhibitors with single digit micromolar (M) IC50 values. The most potent inhibitors identified were evaluated for inhibitory activity against other metalloproteins, and 2-hydroxy-3-(quinolone-2-yl)propenoic acid did not significantly inhibit human carbonic anhydrase II, matrix metalloproteinase-2, malate dehydrogenase, or lactate dehydrogenase. The small molecules presented in this work represent the most potent inhibitors of the pyruvate carboxylase enzyme to date

Preindustrial and Postwar Economic Development: Is There a Link?

Everybody knows now that the “hardware” dimension of development—the physical infrastructure, for example—is a lot easier to put in place than the “software” to keep it operable, which depends on local skills and institutions. (United Nations Development Programme

A Solder Based Self Assembly Project In An Introductory IC Fabrication Course

Integrated circuit (IC) fabrication principles is an elective course in a senior undergraduate and early graduate student’s curriculum. Over the years, the semiconductor industry relies heavily on students with developed expertise in the area of fabrication techniques, learned in an IC fabrication theory and laboratory course. The theory course gives importance to the physics of manufacturing techniques and is often attached to a subsequent semester laboratory curriculum. The pre-requisite requirement of the theory component for a laboratory course requires students to enroll for two courses in separate semesters and is not an option for all students. Hence, an innovative student project is intended in the theory curriculum to give hands-on experience on the processes. The IC fabrication course is usually associated with high enrollment of students, leading to fewer laboratory experiments. The physics of IC fabrication techniques is important, but few students may perceive the theory as important with no laboratory experience. To improve the course and give students hands-on practice with existing state-of-the-art processing facilities, a tailored project was added to the syllabus. A solder-based self assembly (SBSA) project was introduced in the curriculum for the first time at the University of Alabama in Fall 2011. The student projects were designed in a way to provide an alternative to conventional time-intensive, high cost, and highly tool dependent IC fabrication lab experiments. SBSA forms three dimensional (3D) structures when applied to two dimensional (2D) patterns. The schedule was designed to accommodate theory classes aligned with the fabrication steps and completed by students. The project involved a brainstorming session, a design stage to develop 2D patterns using AutoCAD software, a deposition process, a lithography step, a dip soldering step, a reflow process, scanning electron microscope (SEM) imaging, and a final project presentation. Other processes required to complete the project were performed by the instructor. In general, students showed interest in working in teams, completing the project, and recommended to continuing the SBSA project in future IC fabrication course work. The SBSA project is cost effective and less tool dependent for incorporation in a semester long course. In addition, the project is time effective from both student and instructor perspectives.

On the origin of enstatite chondrite chondrules based on their petrography and comparison with experimentally produced chondrules

The recent discovery of several types 3 and 4 enstatite chondrites (EC) in the Antarctic collection increases greatly the ability to compare unaltered, naturally-formed EC chondrules with chondrules produced experimentally from melts of enstatitic chondrule composition. Because these discoveries are so recent we have undertaken the task of characterizing these chondrules for purposes of comparison. We have looked at several new Antarctic E3 chondrites and Qingzhen. They all have numerous chondrules with well defined outlines and readily identifiable textures. All have mostly porphyritic chondrules, but there are differences in the size and kinds of textures. Radial pyroxene, barred/dendritic px, and cryptocrystalline chondrules are present in differing amounts with one exception

Introducing Creativity In A Design Laboratory For A Freshman Level Electrical And Computer Engineering Course

In the electrical and computer engineering (ECE) curriculum at The University of Alabama, freshmen are introduced to fundamental electrical concepts and units, DC circuit analysis techniques, operational amplifiers, circuit simulation, design, and professional ethics. The two credit course has both lecture and laboratory components that address these topics. The laboratory has been used, in this project, to provide students an experience in design. In one of the laboratory assignments, students work in teams to design and build products giving attention to both function and aesthetics. Creativity is an important attribute for engineers practicing their profession in a global society. The creative process was exercised in the design lab by progressively engaging students through various stages including: brainstorming, formation of a construction plan, producing schematic representations, and implementing their design. In a two- year period, four laboratory exercises were developed to provide design experiences in our introductory ECE course. Assessment results show that the majority of students enjoy several aspects of the laboratory on design and creativity. At the same time, they consider this lab to be one of the most difficult ones due to its open-ended nature. Students who experienced the creative lab were somewhat more likely to state they would continue in their major. Overall, the project team concluded that the creative lab was valuable and did raise awareness of the creative process.

Stoffwechsel, Energie und Entropie in Marx‘ Kritik der Politischen Ökonomie: Jenseits des Podolinsky-Mythos (Teil 2)

"Thermodynamische Überlegungen zu Fragen der Energieerhaltung, der entropischen Dissipation durch Reibung sowie zur Wechselwirkung physikalischer Kräfte spielen im ersten Band des Kapital eine zentrale Rolle. Sie finden sich vor allem im Kapitel über Maschinerie und große Industrie, das den zentralen Teil der Marxschen Untersuchung der industriellen Entwicklung im Kapitalismus darstellt...

The Effect of Inorganic, Organic and No Trace Mineral Supplementation on Growth Performance, Fecal Excretion and Digestibility of Grow-Finish Swine

Fecal analysis, off-test weights, and ultrasonic measurements were used to determine the response of inorganic, organic (BioplexTM), and no trace mineral supplementation on the fecal mineral excretion (Cu, Fe, and Zn) and growth performance traits measured on live pigs (n=560) throughout the grow-finish period. Based on data from the current study, the use of BioplexTM mineral supplementation for phase-fed, grow-finish pigs could potentially decrease the concentration of fecal Cu, Fe and Zn without impacting the overall performance of the animal. Diets containing no trace mineral supplementation fed to pigs throughout the entire growfinish period had an adverse effect on performance and culling rate in the experiment. Organic mineral supplements can ultimately be fed to finishing swine without having a significant effect on percent lean (live or carcass), loin muscle area (LMA), backfat (BF10), average daily gain (ADG), or feed efficiency (FE). The use of BioplexTM (Alltech Inc., Nicholasville, KY) trace minerals has the potential to reduce the environmental impact of swine production without any loss of production efficiency to the producer. Lower excretions of these metals by swine could help prevent bioaccumulation where swine waste is applied. Further investigation into the trace mineral requirements of pigs during times of health and other biological and environmental stresses is warranted

Stoffwechsel, Energie und Entropie in Marx’ Kritik der Politischen Ökonomie:: Jenseits des Podolinsky-Mythos (Teil 1)

Until recently, most commentators, including ecological Marxists, have assumed that Marx’s historical materialism was only marginally ecologically sensitive at best, or even that it was explicitly anti-ecological. However, research over the last decade has demonstrated not only that Marx deemed ecological materialism essential to the critique of political economy and to investigations into socialism, but also that his treatment of the coevolution of nature and society was in many ways the most sophisticated to be put forth by any social theorist prior to the late twentieth century. Still, criticisms continue to be leveled at Marx and Engels for their understanding of thermodynamics and the extent to which their work is said to conflict with the core tenets of ecological economics. In this respect, the rejection by Marx and Engels of the pioneering contributions of the Ukrainian socialist Sergei Podolinsky, one of the founders of energetics, has been frequently offered as the chief ecological case against them. Building on an earlier analysis of Marx’s and Engels’s response to Podolinsky, this article shows that they relied on an open-system, metabolic-energetic model that adhered to all of the main strictures of ecological economics – but one that also (unlike ecological economics) rooted the violation of solar and other environmental-sustainability conditions in the class relations of capitalist society. The result is to generate a deeper understanding of classical historical materialism’s ecological approach to economy and society – providing an ecological- materialist critique that can help uncover the systemic roots of today’s “treadmill of production” and global environmental crisis