A long-lived precision switch actuator for controlling pump-piston action

Switch mechanism limits the stroke of the piston by stopping the piston motor drive. This allows retention of a fluid sample in an automated wet-chemical analysis system

Equity prices and the real economy - A vector error-correction approach

We assess the impact of equity prices on the level of output in the Europe Union economies and the US using Vector Error Correction (VECM) time series techniques. The distinction between impacts in bank based and equity market based economies is shown to be important, with equity prices having a greater impact on output in market-based economies. Share prices are shown to be largely autonomous in variance decompositions, whilst equity price do have a strong impact on output in the UK and US in their variance decompositions. An analysis of impulse responses suggests that large market based economies have more effective fiscal and monetary policy instruments

Stress analysis and buckling of J-stiffened graphite-epoxy panel

A graphite epoxy shear panel with bonded on J stiffeners was investigated. The panel, loaded to buckling in a picture frame shear test is described. Two finite element models, each of which included the doubler material bonded to the panel skin under the stiffeners and at the panel edges, were used to make a stress analysis of the panel. The shear load distributions in the panel from two commonly used boundary conditions, applied shear load and applied displacement, were compared with the results from one of the finite element models that included the picture frame test fixture

Before Virtue: Halakhah, Dharmasastra, and What Law Can Create

Davis, referring to the traditional Jewish and Hindu legal texts, addresses on what law creates or produces. He focuses on both Jewish and Hindu jurisprudence claim that law can create--a human, not a biological homo sapiens, but rather the full ideal of what humans were meant to be. He argues that it is the essential indistinguishability of law and religion in both traditional Judaism and Hinduism that permits the ideal human to be created through religious law

Numerical and approximate solution of the high Reynolds number small separation problem

Several possible methods of solving the small separation problem at high Reynolds number are investigated. In addition to using analytical methods, there are several numerical approaches which are used. High Reynolds number laminar two dimensional problems are used for simplicity. A brief discussion is given of the finite difference methods since these methods are discussed in detail. Most of the emphasis is placed on developing an approximate integral method. As a model problem the supersonic compression ramp problem is chosen since several numerical solutions along with experimental data are available. The techniques discussed are modified and applied to other similar type wall geometries

Does European Unemployment Prop up American Wages?

We consider trade between a flexible wage America and a rigid real wage Europe. In a benchmark case, a move from autarky to free trade doubles the European unemployment rate, while it raises the American unskilled wage to the high European level. Entry of the unskilled South to world markets raises unemployment in Europe. But Europe's commitment to the high wage completely insulates America from the shock. Immigration to America raises American income, but lowers European income dollar-for-dollar, while European unemployment rises one-for-one. We consider a stylized game of the choice of factor market institutions. Mitterand's Europe chooses a high minimum wage and Reagan's America chooses a flexible wage for the unskilled. Paradoxically, unskilled workers are worse off in Europe. Trade equalizes wages, but Europeans bear all of the unemployment required to sustain the high wage.

Error analysis of penetrator impacts on bodies without atmospheres

Penetrators are missile shaped objects designed to implant electronic instrumentation in various of surface materials with a nominal impact speed around 150 m/sec. An interest in the application of this concept to in situ subsurface studies of extra terrestrial bodies and planetary satellites exists. Since many of these objects do not have atmospheres, the feasibility of successfully guiding penetrators to the required near-zero angle-of-attack impact conditions in the absence of an atmosphere was analyzed. Two potential targets were included, i.e., the moon and Mercury and several different penetrator deployment modes were involved. Impact errors arising from open-loop and closed-loop deployment control systems were given particular attention. Successful penetrator implacement requires: (1) that the impact speed be controlled, nominally to 150 m/sec, (2) that the angle of attack be in range 0 deg - 11 deg at impact, and (3) that the impact flight path angle be with 15 deg of vertical

Capacitance Measurements of Defects in Solar Cells: Checking the Model Assumptions

Capacitance measurements of solar cells are able to detect minute changes in charge in the material. For that reason, capacitance is used in many methods to electrically characterize defects in the solar cell. Standard interpretations of capacitance rely on many assumptions, which, if wrong can skew the results. We explore possible alternate explanations for capacitance transitions, which may not be linked directly to defects, such as a non-ideal back contact, and series resistance

Technology, Unemployment, and Relative Wages in a Global Economy

Arguably the most important development in recent decades in US factor markets is the decline in the relative wage of the unskilled. By contrast, in Europe it is undoubtedly the rise and persistence of unemployment. Technology has been identified as a key reason for the rising US wage inequality, while labor market rigidities are often cited as a key reason for European unemployment. This paper seeks to provide a unified account of these major factor market developments. It models the impact of technical change on relative wages and unemployment in a world in which one country has flexible and the other rigid labor market institutions. The results depart significantly but sensibly from what one would expect in a fully flexible wage world. A few stylized facts help to narrow the field to a few candidates to account for these factor market developments.