Phương Trang

Vietnam is an important source of peridot for the international gem market. Gemological and geochemical characteristics of Vietnamese peridot from the Central Highlands are similar to those noted for other localities originating from xenoliths in alkaline basalts. Thi s peridot was derived from a spinel lherzolite source and appeared to form at temperatures between 910° and 980°C and an assumed pressure of 2.0 ± 0.5 GPa, corresponding to a depth of around 60 km. Peridot is a yellowish green to green gem variety of the mineral olivine. It is found as nodules in igneous rocks, occasionally as crystals in veins (in Myanmar and Pakistan) or inside meteorites. The main sources are peridotite xenoliths in alkaline basalts and serpentinized dunites (Shen et al., 2011). Commercially important sources are Zabargad, Egypt; San Carlos, Arizona (United States); Myanmar; China; Kohistan, Pakistan; Vietnam; Ethiopia; and Tanzania. Many studies have focused on the characteristics of peridot...

Leadership competencies are expected to be critical factors for Chief Executive Officers (CEOs) of small and medium sized enterprises (SMEs) to be successful and to lead their SMEs to play the role as the major driver toward economic development in Vietnam. This paper aims to understand the perceptions of CEOs of Vietnamese SMEs regarding the importance of some leadership competencies and the extent to which the competencies of knowledge, skills and attitudes have been acquired by these CEOs. This research was used them a large-scale survey and in-depth interviews method to solve those issues. The result of this research included the significant difference between the perceived importance and the level of acquisition of these competencies, particularly in Vietnam Small and Medium Entreprises. The result of this research can be seen as the important source for practioners in order to design effective training and development programs tailored for CEOs of SMEs. Title:...

This study presents an experimental seasonal forecast of tropical cyclone (TC) activity for Vietnam's coastal region during the 2012-2013 typhoon seasons, using the Regional Climate Model (RegCM, version 4.2) to downscale the global Climate Forecasting System (CFS) forecast. Using an improved vortex tracking algorithm that detects vortex centers efficiently, RegCM reasonably forecasts the general distribution of TC counts in time as well as the TC track pattern during the entire experimental period from February to July 2012 and 2013, despite significant underestimation of the TC counts in the global CFS forecasts that are used as initial and lateral boundary conditions for the RegCM model. Further examination of the storm activity in the Vietnam East Sea that directly influences Vietnam's coastal region shows, however, that RegCM tends to overestimate the TC frequency in this sub-region compared to observation. This suggests that direct applications of the RegCM ...