Critical Fields of mesoscopic superconductors

Recent measurements have shown oscillations in the upper critical field of simply connected mesoscopic superconductors. A quantitative theory of these effects is given here on the basis of a Ginzburg-Landau description. For small fields, the $H-T$ phase boundary exhibits a cusp where the screening currents change sign for the first time thus defining a lower critical field $H_{c1}$. In the limit where many flux quanta are threading the sample, nucleation occurs at the boundary and the upper critical field becomes identical with the surface critical field $H_{c3}$.Comment: 5 pages (Revtex and 2 PostScript figures), to apppear in Z. Phys.

The undersea habitat as a space station analog: Evaluation of research and training potential

An evaluation is given of the utility of undersea habitats for both research and training on behavioral issues relative to the space station. The feasibility of a particular habitat, La Chalupa, is discussed

Strategic Approach to Farming Success

This paper is an abstract of a new book for farmers launched on April 8, 2005 (Nell & Napier, 2005). The two authors, Wim Nell of South Africa and Rob Napier of Australia, have respectively 28 and 37 years national and international experience in strategic agricultural management. The book is written for farmers across the world and is dedicated to all farmers. The book takes the reader on a strategic journey to farming success, which consists of 11 stages. At the end of each stage the reader has the opportunity to answer some questions that will guide the process of compiling a strategic plan for a specific farming business. The book opens new horizons for the modern farmer to manage the farming business more successfully.Farming success, strategic approach, strategic farming, scenarios, holistic management., Farm Management,

Human performance in aerospace environments: The search for psychological determinants

A program of research into the psychological determinants of individual and crew performance in aerospace environments is described. Constellations of personality factors influencing behavior in demanding environments are discussed. Relationships between attitudes and performance and attitudes and personality are also reported. The efficacy of training in interpersonal relations as a means of changing attitudes and behavior is explored along with the influence of personality on attitude change processes. Finally, approaches to measuring group behavior in aerospace settings are described

Adaptive Sampling for Coordinate Metrology

An iterative sampling process for dimensional measurement is presented. The strategy is based upon the use of surface normal measurement data to develop an interpolating curve between sample points. The interpolant is used to select subsequent measurement targets iteratively. The process is repeated until the measurement converges to a complete and accurate evaluation of the surface. The required sample size is proportional to part quality. The most accurate parts will require the least sample points; whereas, lower quality parts will require a greater number of total samples. The method is particularly applicable to measurement of complex surfaces with coordinate measuring machines (CMMs)

Transmission of electrical energy at 220,000 volts

A. E. Silver at the Annual Convention of the A.I.E.E. in 1919 gives some of the reasons why 220,000 Volt transmission is a logical and feasible commercial proposition. He also gives some of the main features of the undertaking...Owing to the great scope of this paper it has been thought necessary to generalize on the discussion of the first two topics and to treat the next two in more detail --Statement of Scope of this Paper, pages 3-4

Chemische Analyse durch Spectralbeobachtungen

1860 fanden Gustav R. Kirchhoff und Robert W. Bunsen in ihrem Heidelberger Labor heraus, dass das durch ein Prisma geleitete Licht erhitzter chemischer Elemente charakterische Linien erzeugt. Diese Linien erlauben die eindeutige Fernidentifizierung der beteiligten Stoffe. Die beiden Forscher publizierten ihre Entdeckung in den Annalen der Physik und Chemie