Responses to natural and man-made hazards in Borno, Northeast Nigeria

This is a study of the responses of the people of eastern Borno to the twin hazards of drought and of an irrigation project stranded by the recent low level of Lake Chad. The environmental awareness of the people has been much influenced by access to information, particularly radio. There was a perceptual dissonance; drought is discerned as a natural act of God, but lake recession is seen as man-made. There is also a gap between responses perceived as appropriate and actual responses consequent on the constraints imposed by the process of modernization, notably the introduction of the South Chad Irrigation Project (SOP). Traditional response mechanisms involving the norm of reciprocity, the use of community resources, agricultural adaptations and sharing have become relatively insignificant in Borno. These are being replaced by emigration, lake floor cultivation and household diversification     

Timber harvest calculations on a National Forest: A case study

Harvest calculations determine sawtimber flows from public lands and are closely scruntinized by a wide spectrum of forest users. This study examines the reliability of harvest calculations on a single national forest in New Mexico Forest Service determinations of an array of variables were reviewed and evaluated. The study revealed a lack of precision in Forest Service adherence to self-imposed procedural standards governing the calculation process. Timber sales have taken place on lands where such standards prohibit harvesting and these lands have been included in annual harvest calculations. Assumptions required by a mathematical model used by the Forest Service in calculating the harvest were not followed in the subsequent implementation of the harvest level. These factors suggest that the Forest Service could have significantly over-stated annual harvest rate for the first decade. Opportunities exist to improve the calculation, and benefits realized may greatly exceed additional costs of implementation     

水环境资源管理措施探讨

水环境资源危机问题在我国日益突出，已成为社会和经济持续发展的主要制约因素之一。本文就当前水环境资源开发利用和保护工作提出了一些战略性的管理措施，以实现可持续发展的总体战略。     

重庆颗粒物自然沉降分布与其显微镜下的物理特征

本文研究了重庆颗粒物自然沉降的分布规律;揭示了市区、郊区颗粒物在显微镜下的物理特征,为研究颗粒物对建筑物体的腐蚀提供了有力的依据。     

新型伤亡事故信息管理系统开发构想

介绍了新型伤亡事故信息管理系统适用范围(企业、行业主管部门和劳动部门),收集信息种类(工伤事故、微伤、险肇、比照工伤事故),数据处理类型(统计上报数据和内部考核数据)及开发的技术关键(强调事故资料标准化)等。     

An analysis of the relationship between uncertainty-reducing exploration and resource taxation

This paper analyses the role of exploration as an uncertainty-reducing activity for a company facing resource taxation. Such exploration is of benefit, even to a risk-neutral company, because it enables a better decision to be made regarding extraction investment (Kretzer, 1994). This paper extends previous contributions to the economics of exploration in several areas which are of practical significance. First, exploration is analysed both in the context of a log-normally distributed resource deposit and of an ad valorem royalty. Second, the role of exploration in an ad valorem royalty regime is contrasted with that of a Resource Rent Tax. Finally, the relationship between exploration and resource taxation in situations of very divergent pre-exploration levels of uncertainty is considered.     

城市居住区的可持续设计及其管理系统

对城市居住区可持续设计的基本内涵、原则与方法进行了论述，分析了居住区可持续设计的管理系统。认为居住区的可持续性设计和管理系统是２１世纪的住房革命，追求社会效益、经济效益和环境效益的统一，也是我国２１世纪居住区建设的发展方向。     

深圳市南山区环保局监测数据管理系统

本文介绍了深圳市南山区环保局监测数据管理系统的结构、组成、功能及应用．系统的应用提高了区域环境管理的现代化水平．     

重庆城市创建山水园林城市的自然生态建设对策

山水园林城市是许多山地城市特色建构的目标。以重庆城市为例，认为山水园林城市的建设是城市物质空间与城市自然空间共同建设的结果，只有针对其自然生态特色提出性建设措施，才能确保城市物质空间建设与自然生态建设的协调。