Power, cool and water production by innovative cycles fed by solar energy

Paper presented to the 3rd Southern African Solar Energy Conference, South Africa, 11-13 May, 2015.The paper analyses complex arrangements for engines that can be engineered using Car Engine Turbocharger Technology. Such engines can be fed by concentrated solar energy, and are capable of producing Mechanical Power, Cool Power and Water concurrently. Ideal cycle analysis demonstrate a high rate of Solar Energy utilization for both mechanical power and cool power, as well as water production. An ideal Power fraction of thermal power from the sun over 50% can be expected. The maximum overall (mechanical and cool power) utilization factor of solar thermal power entering the engine is expected to be about twice the level of previous fractions.dc201

Can the polarization of the strange quarks in the proton be positive ?

Recently, the HERMES Collaboration at DESY, using a leading order QCD analysis of their data on semi-inclusive deep inelastic production of charged hadrons, reported a marginally positive polarization for the strange quarks in the proton. We argue that a non-negative polarization is almost impossible.Comment: 6 pages, latex, minor changes in the discussion after Eq. (9

Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m_N < sqrt(s) < 2 GeV II: photon-induced results

We present a nucleon resonance analysis by simultaneously considering all pion- and photon-induced experimental data on the final states gamma N, pi N, 2 pi N, eta N, K Lambda, K Sigma, and omega N for energies from the nucleon mass up to sqrt(s) = 2 GeV. In this analysis we find strong evidence for the resonances P_{31}(1750), P_{13}(1900), P_{33}(1920), and D_{13}(1950). The omega N production mechanism is dominated by large P_{11}(1710) and P_{13}(1900) contributions. In this second part we present the results on the photoproduction reactions and the electromagnetic properties of the resonances. The inclusion of all important final states up to sqrt(s) = 2 GeV allows for estimates on the importance of the individual states for the GDH sum rule.Comment: 41 pages, 26 figures, discussion extended, typos corrected, references updated, to appear in Phys. Rev.

Situation of medical sciences in 50 top countries from 1996 to 2010- based on quality and quantity of publications

In research outputs both quality and quantity are of critical value and evaluation of both aspects is required for best evaluation. Several studies have worked on single or two-dimensional methods that provide the assessment of quality, quantity or both simultaneously in different branches of sciences, but none of them have played a role in a particular area of medicine. This study has been conducted to compare countries worldwide in the field of medical researches. Measuring both quality and quantity of researches is performed separately. In order to evaluate countries from both aspects of quantity and quality of research outputs, a modified form of the citation per publication (CPPm) and publication per population (PPPm) were used to make these indices comparable through different years and nations by normalizing the values according to the world average standards. When countries are ranked by CPPm, Iceland ranks the 1st with the score of 1.98, Faroe Islands and Gambia rank the 2nd and the 3rd with scores of 1.84 and 1.63, respectively. In PPPm Switzerland, Sweden and Denmark ranked the top three with scores of 13.34, 11.67 and 10.32, respectively. Iran ranked 71 in CPPm and 141 in PPPm. Ranking countries makes it possible to identify countries which have performed better in research outcomes by means of quality and quantity; thus, reforming policies can be taken into action to lower the waste of money, higher quality and quantity of outputs while providing helpful tip(s) for institutions to improve

The Effect on School Operations of the Use of School Management Software in Victoria

Part 3: Key Competencies and School ManagementInternational audienceIn this paper we will discuss the effects on schools in Victoria, Australia of use of the various school management systems provided by the Education Department, and the difference the use of this software has made to school operations. To better appreciate this, using a case study methodology, we will look at the use of these systems in a primary school in metropolitan Melbourne. The Victorian Education Department provides a raft of software for various administrative tasks in its schools and these are described in the paper. The goal of the paper, however, is to analyse the difference these management systems have made to the operation of the case study school and other schools in Victoria, compared with pre-computer manual systems

Dipeptidyl peptidases and inflammatory bowel disease

The original publication can be found at www.springerlink.co