创建高校安全保卫工作长效机制的探索与实践

高校安全保卫工作的长效机制是一个永久的话题,如何构建高校安全保卫工作的长效机制,如何运行长效机制,并使其良好运行,都是目前高校所面临的问题和需要解决的问题。构建良好的长效机制为高校安全保卫工作提供更有力的后盾,就能实现多角度、全方位、立体化的安保工作全覆盖。通过对河北农业大学保卫处工作的研究和分析,对组织体系、规章制度、应急预警、快速反应、信息搜集等几方面机制的建立和运行,实际运行成效等方面的解析进行阐述,为今后建立全校性的安全保卫长效机制提供理论依据。     

Sinkhole formation by groundwater withdrawal: far west rand, South Africa

Sinkholes up to 125 meters wide and 50 meters deep have developed catastrophically in thick unconsolidated debris above pinnacle-weathered dolomite after lowering of the groundwater surface by at least 160 meters. They are caused by shrinkage of desiccated debris, downward migration of debris into bedrock openings, and upward growth of multiple debris "caverns" by roof spalling.     

Alga-like forms in onverwacht series, South Africa: oldest recognized lifelike forms on Earth

Spheroidal and cupshaped, carbonaceous alga-like bodies, as well as filamentous structures and amorphous carbonaceous matter occur in sedimentary rocks of the Onverwacht Series (Swaziland System) in South Africa. The Onverwacht sediments are older than 3.2 eons, and they are probably the oldest, littlealtered sedimentary rocks on Earth. The basal Onverwacht sediments lie approximately 10,000 meters stratigraphically below the Fig Tree sedimentary rocks, from which similar organic microstructures have been interpreted as alga-like microfossils. The Onverwacht spheroids and filaments are best preserved in black, carbonrich cherts and siliceous argillites interlayered with thick sequences of lavas. These lifelike forms and the associated carbonaceous substances are probably biological in origin. If so, the origins of unicellular life on Earth are buried in older rocks now obliterated by igneous and metamorphic events.     

A major Archean,gold- and crust-forming event in the Kaapvaal craton,South Africa

The 2.89- to 2.76-gigayear-old conglomerates of the Central Rand Group of South Africa host an immense concentration of gold. The gold and rounded pyrites from the conglomerates yield a rhenium-osmium isochron age of 3.03 +/- 0.02 gigayears and an initial 187Os/188Os ratio of 0.1079 +/- 0.0001. This age is older than that of the conglomerates. Thus, the gold is detrital and was not deposited by later hydrothermal fluids. This Middle Archean gold mineralization event corresponds to a period of rapid crustal growth in which much of the Kaapvaal craton was formed and is evidence for a significant noble metal flux from the mantle.     

南非的农业发展和经验借鉴

经贵州省政府批准,我参加以省农业办公室副主任王向规同志为团长的贵州省农业考察团,于2003年12月23～31日对南非农业进行了考察。考察团在南非约翰内斯堡、开普敦等地考察了南非国家野生动物自然保护区、干旱农业节水灌溉生产区、鸵鸟养殖场。以及农场主经营的大面积玉米、柑橘和葡萄生产加工情况。考察期间,在     

An Archean Geomagnetic Reversal in the Kaap Valley Pluton, South Africa

The Kaap Valley pluton in South Africa is a tonalite intrusion associated with the Archean Barberton Greenstone Belt. Antipodal paleomagnetic directions determined from the central and marginal parts of the pluton record a geomagnetic reversal that occurred as the pluton cooled. The age of the reversal is constrained by an 40Ar/39Ar plateau age from hornblende at 3214 +/- 4 million years, making it the oldest known reversal. The data presented here suggest that Earth has had a reversing, perhaps dipolar, magnetic field since at least 3.2 billion years ago.     

埃及、南非农业考察报告

通过埃及,南非农业考察,我们对两国农业发展经验,尤其是两国政府在农业管理的成功作法有了概要了解。两国对农产品市场的建设与管理,农业科研与科技成果应用推广一体化以及农业节水灌溉等值得我们学习和借鉴。     

南美洲和非洲的农业资源及其开发

随着我国经济的快速发展,城市化进程将更进一步,相应的耕地面积也将减少,如何保障我国粮食安全成为一个应长期关注的问题。通过分析南美洲和非洲的土地资源、人力资源、水资源及相关政策,提出了发展海外农业的新观点及建议。     

Late Pleistocene human skull from Hofmeyr, South Africa, and modern human origins

The lack of Late Pleistocene human fossils from sub-Saharan Africa has limited paleontological testing of competing models of recent human evolution. We have dated a skull from Hofmeyr, South Africa, to 36.2 +/- 3.3 thousand years ago through a combination of optically stimulated luminescence and uranium-series dating methods. The skull is morphologically modern overall but displays some archaic features. Its strongest morphometric affinities are with Upper Paleolithic (UP) Eurasians rather than recent, geographically proximate people. The Hofmeyr cranium is consistent with the hypothesis that UP Eurasians descended from a population that emigrated from sub-Saharan Africa in the Late Pleistocene.     

Endogenous knowledge and practice regarding the environment in a Nahua community in Mexico

We expose some representations and practices related to the natural environment among Nahua peasants in a village located at the western boundary of Puebla and Guerrero states, in Mexico. Information was obtained by individual interviews and focal groups' work, following an open guide with ecological items considered as rooted in Mesoamerican cultures. The use of some local, vegetal resources, and the local perception of changes, mainly in the water availability, is documented. Survival strategies involve ancestral representations and material products, and entail a high grade of pragmatism. “Natural environment” is framed in a local culture that involves relational and sacred dimensions, usually omitted in other approaches. Hence, for the Temalac peasants, there is no dissection, at an operative level, between “natural facts” (for instance, water availability) and personal or social ones, being these often considered as determinant for the quality and accessibility of resources and weather conditions. We discuss the challenge for these elements posed by a growing migration rate and an increasing external influence.     

南非、坦桑尼亚农业支持和服务体系

一、南非、坦桑尼亚农业概况 南非国土面积122万km^2,其中．可耕地面积约占13％;人口4529万,其中。农业人口约占9％。据世界银行最新统计．2003年南非GDP为1599亿美元．人均3482美元。南非原是一个农牧业国家,随着工矿业的发展．农业占GDP的比重逐步下降．目前仅占GDP的3．2％．     

Impact of variable-rate application of nitrogen on yield and profit: a case study from South Africa

The response of maize (Zea mays) to banded variable-rate nitrogen (N) application over a period of 3 years (2002/3–2004/5) is analyzed. The experimental design alternated variable-rate (VR) and single-rate (SR) applications of N. The yield monitor data were spatially autocorrelated and therefore were analyzed with spatial regression methods. The baseline spatial regression model defined in this study showed that the VR treatment, treatment by year and treatment by management zone were statistically significant. Sensitivity tests were applied; the first showed that VR treatment had a yield advantage when soil depth was greater than the field average of 174 cm. The second test showed that the VR N rates applied were close to those that would maximize profit. Partial budgeting indicates that benefits from VR vary from year to year, but in this test VR was slightly more profitable than uniform rate application. Economic sensitivity testing indicates that farm size and the price of maize are the key factors in the profitability of VR N.     

南非低地地区烤烟生产技术与启示

介绍了南非烟草生产概况,以及南非低地地区土壤改良、轮作、烟草育苗、整地起垄、施肥、移栽、除草、灌溉、病虫害防治、打顶抑芽、采收调制等烟叶生产技术,并提出了中国烤烟生产可借鉴的对策和建议:因地制宜探讨各项技术、开发绿色环保技术、重视烟叶生产前期工作。