Structural analyses show that the Ailaoshan-Red River shear zone （ASRRSZ） in Ailao Mountain is composed of three different deformational domains. These domains may represent three episodes of left-lateral slip exper...Structural analyses show that the Ailaoshan-Red River shear zone （ASRRSZ） in Ailao Mountain is composed of three different deformational domains. These domains may represent three episodes of left-lateral slip experienced by the ASRRSZ. The first episode of such deformation occurred throughout the eastern high-grade belt of the ASRRSZ under a transtensional regime and produced L- type tectonites of amphibolite grade. The second episode of left-lateral slip formed high strain zones overprinting the high-grade belt. Its deformational mechanism is similar to simple shear and the deformed rocks are L-S mylonites of greenschist grade. The third episode of left-lateral slip took place chiefly in a western low-grade belt of the ASRRSZ. This deformation occurred in a transpressional regime, formed an overall structure pattern of a sinistral thrust system and produced phyllonites of low-greenschist grade. Geochronological data indicated that the three episodes of left-lateral slip happened before ～58-56 Ma, at least from ～27 Ma to 22 Ma and at ～13-12 Ma respectively. The first episode of slip in the ASRRSZ appeared to correspond to the initial collision of India and Asia at ～60 Ma. The second episode took place almost at the same time as the most intensive compression and uplift in Tibet. The latest event might represent a further eastward material flow in Tibet after ～16-13 Ma. Thus, the ASRRSZ of southeastern Asia probably experienced three main episodes of Tertiary left- lateral slip in the course of intracontinental convergence since the India-Asia collision.展开更多
The relation between the basic currents of the low latitudes and the initiation of typhoons is investigated statistic-ally and synoptically by means of recent aerological data. It is shown that about 80% of typhoons d...The relation between the basic currents of the low latitudes and the initiation of typhoons is investigated statistic-ally and synoptically by means of recent aerological data. It is shown that about 80% of typhoons developed in the eastern part of the equatorial convergence zone between the equatorial westerlies and trade wind of West Pacific Ocean. The equatorial westerly is a large scale and quasi-steady phenomenon; therefore, it is probably reasonable to be called ＂basic current＂ and typhoons are considered as vortices of smaller scale. There is a quite definite relation- ship between the time, position, frequency of the initiation of typhoons and the position, strength of the basic cur-rents in the low latitudes. There is a quasi-periodical variation of the strength and position of the basic currents with a period longer than one month. This fact may be helpful for the extended forecast the initiation and development of ty-phoons.展开更多
Mental health literacy(MHL)refers to knowledge and attitudes that shape the recognition,management,and prevention of mental disorders.While the topic has been exhaustively researched in Western countries,research from...Mental health literacy(MHL)refers to knowledge and attitudes that shape the recognition,management,and prevention of mental disorders.While the topic has been exhaustively researched in Western countries,research from Southeast Asia still is limited.Previous studies in this field showed a moderate recognition of mental disorders,a high prevalence of stigmatizing attitudes and a low willingness to seek professional help among Southeastern-Asian populations.This study explored the level of MHL among university students from different parts of Vietnam and Cambodia.Correlations with influencing factors(gender,age,study year,educational attainment of the parents,urban/rural origin,ethnicity,personal experiences with mental disorders)were also explored.An online survey,using a 30-item Vietnamese version of the Mental Health Literacy Scale(MHLS),was conducted at six university sites in Vietnam and Cambodia.Data of 1032 students from different study branches were included.The MHL of Vietnamese and Cambodian university students was lower,compared to samples from Australia or the UK.Females and students with a personal experience of mental disorders(self or family)showed a significantly higher MHL.No differences in MHL were found between students from different socioeconomic backgrounds(professional attainment of parents,urban/rural origin).Findings on the influence of ethnicity were inconclusive.MHL needs to be improved among the university students of Vietnam and Cambodia.Mental health promotion should specifically target male students,students from STEM branches,and international students.展开更多
基金This work was supported by the National Natural Science Foundation of China （grants Nos. 49802020, 49732100 and 40172074)the Specific Project for Authors of the Best Dissertations of Chinese Universities and Colleges （200022)
文摘Structural analyses show that the Ailaoshan-Red River shear zone （ASRRSZ） in Ailao Mountain is composed of three different deformational domains. These domains may represent three episodes of left-lateral slip experienced by the ASRRSZ. The first episode of such deformation occurred throughout the eastern high-grade belt of the ASRRSZ under a transtensional regime and produced L- type tectonites of amphibolite grade. The second episode of left-lateral slip formed high strain zones overprinting the high-grade belt. Its deformational mechanism is similar to simple shear and the deformed rocks are L-S mylonites of greenschist grade. The third episode of left-lateral slip took place chiefly in a western low-grade belt of the ASRRSZ. This deformation occurred in a transpressional regime, formed an overall structure pattern of a sinistral thrust system and produced phyllonites of low-greenschist grade. Geochronological data indicated that the three episodes of left-lateral slip happened before ～58-56 Ma, at least from ～27 Ma to 22 Ma and at ～13-12 Ma respectively. The first episode of slip in the ASRRSZ appeared to correspond to the initial collision of India and Asia at ～60 Ma. The second episode took place almost at the same time as the most intensive compression and uplift in Tibet. The latest event might represent a further eastward material flow in Tibet after ～16-13 Ma. Thus, the ASRRSZ of southeastern Asia probably experienced three main episodes of Tertiary left- lateral slip in the course of intracontinental convergence since the India-Asia collision.
文摘The relation between the basic currents of the low latitudes and the initiation of typhoons is investigated statistic-ally and synoptically by means of recent aerological data. It is shown that about 80% of typhoons developed in the eastern part of the equatorial convergence zone between the equatorial westerlies and trade wind of West Pacific Ocean. The equatorial westerly is a large scale and quasi-steady phenomenon; therefore, it is probably reasonable to be called ＂basic current＂ and typhoons are considered as vortices of smaller scale. There is a quite definite relation- ship between the time, position, frequency of the initiation of typhoons and the position, strength of the basic cur-rents in the low latitudes. There is a quasi-periodical variation of the strength and position of the basic currents with a period longer than one month. This fact may be helpful for the extended forecast the initiation and development of ty-phoons.
基金The Natural Science Foundation of Yunnan Province (2007C099M)the National Natural Science Foundation of China(30970332, 30730017)the National Basic Research Program of China 973 Program (2007CB411600)
文摘Mental health literacy(MHL)refers to knowledge and attitudes that shape the recognition,management,and prevention of mental disorders.While the topic has been exhaustively researched in Western countries,research from Southeast Asia still is limited.Previous studies in this field showed a moderate recognition of mental disorders,a high prevalence of stigmatizing attitudes and a low willingness to seek professional help among Southeastern-Asian populations.This study explored the level of MHL among university students from different parts of Vietnam and Cambodia.Correlations with influencing factors(gender,age,study year,educational attainment of the parents,urban/rural origin,ethnicity,personal experiences with mental disorders)were also explored.An online survey,using a 30-item Vietnamese version of the Mental Health Literacy Scale(MHLS),was conducted at six university sites in Vietnam and Cambodia.Data of 1032 students from different study branches were included.The MHL of Vietnamese and Cambodian university students was lower,compared to samples from Australia or the UK.Females and students with a personal experience of mental disorders(self or family)showed a significantly higher MHL.No differences in MHL were found between students from different socioeconomic backgrounds(professional attainment of parents,urban/rural origin).Findings on the influence of ethnicity were inconclusive.MHL needs to be improved among the university students of Vietnam and Cambodia.Mental health promotion should specifically target male students,students from STEM branches,and international students.
