Stemming the TIDE: A correction of Fortner (1999) and a clarification of Larson and Hoyt (2007).

In this article, the author corrects an error in his 1999 dissertation (see record 2000-95004-391), which was summarized in detail shortly after its approval and was intensely examined more recently by D. G. Larson and W. T. Hoyt (see record #200711559-003). An error in the text of the dissertation transposed the variables of the denominator of the treatment-induced deterioration statistic (TIDE). The error was limited to the text of the document, and all calculations and results reported in the dissertation are correct. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

澳大利亚国家保护地规划历程及其借鉴

澳大利亚国家保护地是基于澳大利亚国土范围内特有的生态、物种和景观资源保护而建立的自然资源保护地,对澳大利亚保护国家生态环境和生物多样性发挥了核心作用。澳大利亚国家保护地体系建设是促进保护地规划系统化发展的重要支撑,其规划建设的过程、经验和思路具有积极的参考价值。通过对发展过程的梳理,将澳大利亚国家保护地规划历程划分为5个阶段,对其建设背景、过程和核心内容做了总结,在此基础上对其国家保护地与国家公园的协同规划矛盾做了分析,对其实施的体系建设策略做了解读。协调好国家自然保护区、国家公园以及国家风景名胜区三者间的关系并在此基础上建立完善的体系建立机制是中国国家公园体制建设的前提条件与关键问题。基于以上思考,本文从指导框架、保护体系、规划合作以及监管机制4个层次对澳大利亚国家自然保护地体系建设的借鉴意义做了总结。     

Physiochemical characterization of five iron tubercles from a single drinking water distribution system: Possible new insights on their formation and growth

Physiochemical data were obtained for five iron tubercles from a single drinking water distribution system (DS). Texturally, there were two groups based on internal morphology: one with a core of soft brownish material marbled with veins of a hard black material, the other has a core consisting mostly of the hard, black material. Three iron mineral phases occur, α-FeOOH, γ-FeOOH, or Fe₃O₄. All three coexist in each tubercle but in widely varying proportions. These iron pipe tubercles exhibit a greater diversity within a single DS than previously thought. Because the chemical conditions for the formation of each material is different, water quality parameters may not be the main control of tubercle formation and growth.     

MnS doped mesoporous silica catalysts for the generation of novel carbon nanocages

Novel MnS impregnated mesoporous silica systems have been originated for the generation of carbon nanocages. The procedure involves a simple catalytic vapour deposition (CVD) method. This is the first time that a transition metal sulfide has been used for the synthesis of carbon nanostructures.     

A band-ratio algorithm for retrieving open-lake chlorophyll values from satellite observations of the Great Lakes

The U.S. Environmental Protection Agency's Great Lakes National Program Office (GLNPO) has collected water quality data from the five Great Lakes annually since 1993. We used the GLNPO observations made since 2002 along with coincident measurements made by the Sea-viewing Wide Field-of-View Sensor (SeaWiFS) and the Moderate-resolution Imaging Spectroradiometer (MODIS) to develop a new band-ratio algorithm for estimating chlorophyll concentrations in the Great Lakes from satellite observations. The new algorithm is based on a third-order polynomial model using the same maximum band ratios employed in the standard NASA algorithms (OC4 for SeaWiFS and OC3M for MODIS). The sensor-specific coefficients for the new algorithm were obtained by fitting the relationship to several hundred matched field and satellite observations. Although there are some seasonal variations in some lakes, the relationship between the observed chlorophyll values and those modeled using the new coefficients is fairly stable from lake to lake and across years. The accuracy of the satellite chlorophyll estimates derived from the new algorithm was improved substantially relative both to the standard NASA retrievals and to previously published algorithms tuned to individual lakes. Monte-Carlo fits to randomly selected subsets of the observations allowed us to estimate the uncertainty associated with the retrievals purely as a function of the satellite data. Our results provide, for the first time, a single simple band ratio method for retrieving chlorophyll concentrations in the offshore “open” waters of the Great Lakes from satellite observations.     

Analysis and design of a three-phase current source solid-state VARcompensator

A reactive power compensation (RPC) system which uses a three-phase current-source force-commutated PWM (pulsewidth-modulated) rectifier is presented and analyzed. Pulsewidth modulation is also investigated as a means of reducing the size of reactive components. The proposed RPC system can compensate for leading and lagging displacement power factor. Other areas of investigation include the selection of rectifier input and output filter components and the closing of the loop around the reactive power command signal. finally, predicted results are verified experimentally     

Sixteen-channel coherent broadcast network at 155 Mbit/s

An experimental 155.52 Mb/s coherent broadcast network with 16 channels using a conventional distributed feedback (DFB) laser operating at 1540 nm is described. It includes absolute laser frequency stabilization, a fiber span of 74.4 km, and a balanced polarization-diversity single-filter frequency-shift keying (FSK) heterodyne receiver. At a channel spacing of 8.5 GHz a power penalty of 0.3 dB is incurred due to adjacent channel crosstalk     

Synfuel development impacts— econometric modelling and policy analysis

The prospects for rapid near-term development of a synfuel industry in the USA have decreased, due to depressed world oil prices, synfuel project cost overruns, and the lukewarm support of the Reagan administration. Nonetheless, socioeconomic and environmental impact analysis studies can provide valuable information for determining the regional welfare effects of proposed projects. The author discusses the results of a regional econometric analysis of the synfuel projects planned for Western Kentucky, which focuses on environmental impacts, and reveals the inevitable trade-offs that would accompany synfuel development. Some policy issues are briefly reviewed, especially that of efficient energy pricing.