Why there is no spin-orbit inversion in heavy-light mesons?

We show that the absence of spin-orbit inversions in heavy-light mesons can be explained by the chiral radiative corrections in potential model. A new potential model estimate is given of the masses for P-wave bottom mesons.Comment: 10 pages, published in PR

An alternative technical education system : a case study of Mexico

Many developing countries have relied on the varied forms of diversified secondary technical education as the main venue for training skilled workers and mid-level technicians. But there have been numerous and strong critics against this mode of technical education. As an alternative, the Mexican government established the CONALEP system (el Colegio National de Educacion Profesional Tecnica), a new vocational and technical education system) in the late 1970's. This report tests the viability of the system by evaluating CONALEP graduates'labor market performance in comparison with other forms of education. It also supplements the scant literature on the transition from technical education to work and on the use of technical skills. Although it is a Mexican program, the special features of the CONALEP system bear policy implications for other countries as well. With globalization and the rapidly changing technology requirements of the Mexican economy, however, this alternative form of technical secondary education faces new challenges, notably adjustment of its curriculum to changing market circumstances and improvement of its external and internal efficiency.Teaching and Learning,Curriculum&Instruction,Gender and Education,Primary Education,Tertiary Education

Development Cooperation for Economic Integration of East and South Asia.

This study aims to analyze the rationale, trends, and scope of development cooperation in connection with economic integration, especially among countries in East and South Asia. It reviews the development of multilateral, regional, and bilateral economic integration efforts and discusses the rationales for development cooperation in the context of economic integration. It then reviews the history and patterns of aidfortrade around the world during the period 1973-2005, drawing lessons for future directions of aid-for-trade.economic integration, development cooperation, aid-for-trade, East Asia, South Asia

Proto-type installation of a double-station system for the optical-video-detection and orbital characterisation of a meteor/fireball in South Korea

We give a detailed description of the installation and operation of a double-station meteor detection system which formed part of a research & education project between Korea Astronomy Space Science Institute and Daejeon Science Highschool. A total of six light-sensitive CCD cameras were installed with three cameras at SOAO and three cameras at BOAO observatory. A double-station observation of a meteor event enables the determination of the three-dimensional orbit in space. This project was initiated in response to the Jinju fireball event in March 2014. The cameras were installed in October/November 2014. The two stations are identical in hardware as well as software. Each station employes sensitive Watec-902H2 cameras in combination with relatively fast f/1.2 lenses. Various fields of views were used for measuring differences in detection rates of meteor events. We employed the SonotaCo UFO software suite for meteor detection and their subsequent analysis. The system setup as well as installation/operation experience is described and first results are presented. We also give a brief overview of historic as well as recent meteor (fall) detections in South Korea. For more information please consult http://meteor.kasi.re.kr .Comment: Technical/instrumentation description of a professional meteor detection system, 23 pages, 20 figures (color/monochrome), 5 tables, submitted to the Journal of Korean Astronomical Society (JKAS, http://jkas.kas.org/, http://jkas.kas.org/history.html