983 resultados para 149-901


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Parte 1 - Cartas de Lei, Alvarás, Decretos e Cartas Régias.

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CONTENTS: I. U.S.-Japan Cooperation Open Ocean Aquaculture – A Venue for Cooperative Research Between the United States and Japan.............................................................................. 1 C. Helsley II. Growth, Nutrition and Genetic Diversity Daily Ration of Hatchery-Reared Japanese Flounder Paralichthys olivaceus as an Indicator of Release Place, Time and Fry Quality. In situ Direct Estimation and Possibility of New Methods by Stable Isotope............................ 7 O. Tominaga, T. Seikai, T. Tsusaki, Y. Hondo, N. Murakami, K. Nogami, Y. Tanaka and M. Tanaka Nucleic Acids and Protein Content as a Measure to Evaluate the Nutritional Condition of Japanese Flounder Paralichthys olivaceus Larvae and Juveniles........................................................................................................ 25 W. Gwak Genetic Diversity Within and Between Hatchery Strains of Flounder Paralichthys olivaceus Assessed by Means of Microsatellite and Mitochondrial DNA Sequencing Analysis...................................................................... 43 M. Sekino, M. Hara and N. Taniguchi Tracking Released Japanese Flounder Paralichthys olivaceus by Mitochondrial DNA Sequencing................................................................................ 51 T. Fujii Preliminary Aspects of Genetic Management for Pacific Threadfin Polydactylus sexfilis Stock Enhancement Research in Hawaii........................................ 55 M. Tringali, D. Ziemann and K. Stuck Enhancement of Pacific Threadfin Polydactylus sexfilis in Hawaii: Interactions Between Aquaculture and Fisheries............................................................. 75 D. Ziemann Aquaculture and Genetic Structure in the Japanese Eel Anguilla japonica..................... 87 M. Katoh and M. Kobayashi Comparative Diets and Growth of Two Scombrid Species, Chub Mackerel Scomber japonicus and Japanese Spanish Mackerel Scomberomorus niphonius, in the Central Seto Inland Sea, Japan.................................. 93 J. Shoji, M. Tanaka and Tsutomu Maehara iii Evaluating Stock Enhancement Strategies: A Multi-disciplinary Approach................... 105 T. M. Bert, R.H. McMichael, Jr., R.P. Cody, A. B. Forstchen, W. G. Halstead, K. M. Leber, J. O’Hop, C. L. Neidig, J. M. Ransier, M. D. Tringali, B. L. Winner and F. S. Kennedy III. Physiological and Ecological Applications Predation on Juvenile Chum Salmon Oncorhynchus keta by Fishes and Birds in Rivers and Coastal Oceanic Waters of Japan................................... 127 K. Nagasawa and H. Kawamura Interaction Between Cleaner and Host: The Black Porgy Cleaning Behavior of Juvenile Sharpnose Tigerfish Rhyncopelates Oxyrhynchus in the Seto Inland Sea, Western Japan............................................................................. 139 T. Shigeta, H. Usuki and K. Gushima IV. Case Studies Alaska Salmon Enhancement: A Successful Program for Hatchery and Wild Stocks............................................................................................... 149 W. Heard NMFS Involvement with Stock Enhancement as a Management Tool........................... 171 T. McIlwain Stock Enhancement Research with Anadromous and Marine Fishes in South Carolina...................................................................................... 175 T. I. J. Smith, W. E. Jenkins, M. R. Denson and M. R. Collins Comparison of Some Developmental, Nutritional, Behavioral and Health Factors Relevant to Stocking of Striped Mullet, (Mugilidae), Sheepshead (Sparidae), Common Snook (Centropomidae) and Nassau Groupers (Serranidae)........................... 191 J. W. Tucker Jr. and S. B. Kennedy Participants in the Thirtieth U.S.-Japan Meeting on Aquaculture................. Inside Back Cover iv (PDF has 204 pages.)

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Partiendo de una revisión de la literatura sobre la compleja realidad de las marcas de distribuidor, el concepto del valor de la marca y sus antecedentes, este trabajo plantea varias hipótesis referentes al efecto de la imagen de enseña y el precio sobre el valor de un tipo de marca de distribuidor (las marcas de cadena), que se contrastan en el sector de los hipermercados. El propósito de este artículo es indagar en los antecedentes clave del valor de las marcas de distribuidor, con el fin de alcanzar un mayor conocimiento de las vías que permiten aumentar el valor de las marcas de distribuidor.

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This paper reviews firstly methods for treating low speed rarefied gas flows: the linearised Boltzmann equation, the Lattice Boltzmann method (LBM), the Navier-Stokes equation plus slip boundary conditions and the DSMC method, and discusses the difficulties in simulating low speed transitional MEMS flows, especially the internal flows. In particular, the present version of the LBM is shown unfeasible for simulation of MEMS flow in transitional regime. The information preservation (IP) method overcomes the difficulty of the statistical simulation caused by the small information to noise ratio for low speed flows by preserving the average information of the enormous number of molecules a simulated molecule represents. A kind of validation of the method is given in this paper. The specificities of the internal flows in MEMS, i.e. the low speed and the large length to width ratio, result in the problem of elliptic nature of the necessity to regulate the inlet and outlet boundary conditions that influence each other. Through the example of the IP calculation of the microchannel (thousands m ? long) flow it is shown that the adoption of the conservative scheme of the mass conservation equation and the super relaxation method resolves this problem successfully. With employment of the same measures the IP method solves the thin film air bearing problem in transitional regime for authentic hard disc write/read head length ( 1000 L m ? = ) and provides pressure distribution in full agreement with the generalized Reynolds equation, while before this the DSMC check of the validity of the Reynolds equation was done only for short ( 5 L m ? = ) drive head. The author suggests degenerate the Reynolds equation to solve the microchannel flow problem in transitional regime, thus provides a means with merit of strict kinetic theory for testing various methods intending to treat the internal MEMS flows.

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This technical memorandum documents the design, implementation, data preparation, and descriptive results for the 2006 Annual Economic Survey of Federal Gulf Shrimp Permit Holders. The data collection was designed by the NOAA Fisheries Southeast Fisheries Science Center Social Science Research Group to track the financial and economic status and performance by vessels holding a federal moratorium permit for harvesting shrimp in the Gulf of Mexico. A two page, self-administered mail survey collected total annual costs broken out into seven categories and auxiliary economic data. In May 2007, 580 vessels were randomly selected, stratified by state, from a preliminary population of 1,709 vessels with federal permits to shrimp in offshore waters of the Gulf of Mexico. The survey was implemented during the rest of 2007. After many reminder and verification phone calls, 509 surveys were deemed complete, for an ineligibility-adjusted response rate of 90.7%. The linking of each individual vessel’s cost data to its revenue data from a different data collection was imperfect, and hence the final number of observations used in the analyses is 484. Based on various measures and tests of validity throughout the technical memorandum, the quality of the data is high. The results are presented in a standardized table format, linking vessel characteristics and operations to simple balance sheet, cash flow, and income statements. In the text, results are discussed for the total fleet, the Gulf shrimp fleet, the active Gulf shrimp fleet, and the inactive Gulf shrimp fleet. Additional results for shrimp vessels grouped by state, by vessel characteristics, by landings volume, and by ownership structure are available in the appendices. The general conclusion of this report is that the financial and economic situation is bleak for the average vessels in most of the categories that were evaluated. With few exceptions, cash flow for the average vessel is positive while the net revenue from operations and the “profit” are negative. With negative net revenue from operations, the economic return for average shrimp vessels is less than zero. Only with the help of government payments does the average owner just about break even. In the short-term, this will discourage any new investments in the industry. The financial situation in 2006, especially if it endures over multiple years, also is economically unsustainable for the average established business. Vessels in the active and inactive Gulf shrimp fleet are, on average, 69 feet long, weigh 105 gross tons, are powered by 505 hp motor(s), and are 23 years old. Three-quarters of the vessels have steel hulls and 59% use a freezer for refrigeration. The average market value of these vessels was $175,149 in 2006, about a hundred-thousand dollars less than the average original purchase price. The outstanding loans averaged $91,955, leading to an average owner equity of $83,194. Based on the sample, 85% of the federally permitted Gulf shrimp fleet was actively shrimping in 2006. Of these 386 active Gulf shrimp vessels, just under half (46%) were owner-operated. On average, these vessels burned 52,931 gallons of fuel, landed 101,268 pounds of shrimp, and received $2.47 per pound of shrimp. Non-shrimp landings added less than 1% to cash flow, indicating that the federal Gulf shrimp fishery is very specialized. The average total cash outflow was $243,415 of which $108,775 was due to fuel expenses alone. The expenses for hired crew and captains were on average $54,866 which indicates the importance of the industry as a source of wage income. The resulting average net cash flow is $16,225 but has a large standard deviation. For the population of active Gulf shrimp vessels we can state with 95% certainty that the average net cash flow was between $9,500 and $23,000 in 2006. The median net cash flow was $11,843. Based on the income statement for active Gulf shrimp vessels, the average fixed costs accounted for just under a quarter of operating expenses (23.1%), labor costs for just over a quarter (25.3%), and the non-labor variable costs for just over half (51.6%). The fuel costs alone accounted for 42.9% of total operating expenses in 2006. It should be noted that the labor cost category in the income statement includes both the actual cash payments to hired labor and an estimate of the opportunity cost of owner-operators’ time spent as captain. The average labor contribution (as captain) of an owner-operator is estimated at about $19,800. The average net revenue from operations is negative $7,429, and is statistically different and less than zero in spite of a large standard deviation. The economic return to Gulf shrimping is negative 4%. Including non-operating activities, foremost an average government payment of $13,662, leads to an average loss before taxes of $907 for the vessel owners. The confidence interval of this value straddles zero, so we cannot reject, with 95% certainty, that the population average is zero. The average inactive Gulf shrimp vessel is generally of a smaller scale than the average active vessel. Inactive vessels are physically smaller, are valued much lower, and are less dependent on loans. Fixed costs account for nearly three quarters of the total operating expenses of $11,926, and only 6% of these vessels have hull insurance. With an average net cash flow of negative $7,537, the inactive Gulf shrimp fleet has a major liquidity problem. On average, net revenue from operations is negative $11,396, which amounts to a negative 15% economic return, and owners lose $9,381 on their vessels before taxes. To sustain such losses and especially to survive the negative cash flow, many of the owners must be subsidizing their shrimp vessels with the help of other income or wealth sources or are drawing down their equity. Active Gulf shrimp vessels in all states but Texas exhibited negative returns. The Alabama and Mississippi fleets have the highest assets (vessel values), on average, yet they generate zero cash flow and negative $32,224 net revenue from operations. Due to their high (loan) leverage ratio the negative 11% economic return is amplified into a negative 21% return on equity. In contrast, for Texas vessels, which actually have the highest leverage ratio among the states, a 1% economic return is amplified into a 13% return on equity. From a financial perspective, the average Florida and Louisiana vessels conform roughly to the overall average of the active Gulf shrimp fleet. It should be noted that these results are averages and hence hide the variation that clearly exists within all fleets and all categories. Although the financial situation for the average vessel is bleak, some vessels are profitable. (PDF contains 101 pages)

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Eguíluz, Federico; Merino, Raquel; Olsen, Vickie; Pajares, Eterio; Santamaría, José Miguel (eds.)

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This report provides an assessment of recent investigations into endocrine disruption in fresh and saltwater species of fish. Most work to date has concen-trated on reproductive endocrine disruption. Laboratory studies have shown a variety of synthetic and natural chemicals including certain industrial intermediates, PAHs, PCBs, pesticides, dioxins, trace elements and plant sterols can interfere with the endocrine system in fish. The potency of most of these chemicals, however, is typically hundreds to thousands of times less than that of endog-enous hormones. Evidence of environmental endocrine disruption ranges from the presence of female egg proteins in males and reduced levels of endogenous hormones in both males and females, to gonadal histopathologies and intersex (presence of ovotestes) fish. Overt endocrine disruption in fish does not appear to be a ubiquitous environmental phenomenon, but rather more likely to occur near sewage treatment plants, pulp and paper mills, and in areas of high organic chemical contamination. However, more wide-spread endocrine disruption can occur in rivers with smaller flows and correspondingly large or numerous wastewater inputs. Some of the most severe examples of endocrine disruption in fish have been found adjacent to sewage treatment plants. Effects are thought to be caused prima-rily by natural and synthetic estrogens and to a lesser extent by the degradation products of alkylphenol poly-ethoxylate surfactants. Effects found in fish near pulp and paper mills include reduced levels of estrogens and androgens as well as masculinization of females, and has been linked to the presence of β-sitosterol, a plant sterol. Effects seen in areas of heavy industrial activity typically include depressed levels of estrogens and androgens as well as reduced gonadal growth, and may be linked to the presence of PAHs, PCBs, and possibly dioxins. At this time, however, there is no clear indication that large populations of fish are being seriously impacted as a result of endocrine disruption, although additional work is needed to address this possibility. (PDF contains 63 pages)

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La literatura señala el importante papel que los trabajadores juegan en los resultados de una empresa y que las prácticas de gestión de recursos humanos pueden tener un efecto positivo sobre el rendimiento organizativo. Aunque esta realidad se ha estudiado ampliamente a nivel de empresa privada, lo cierto es que en el ámbito de la Administración Pública la investigación es más escasa, especialmente para corporaciones locales. Con el propósito de cubrir este hueco, este trabajo realiza un estudio de casos sobre nueve ayuntamientos de la Región de Murcia para analizar si una adecuada gestión de sus trabajadores influye en sus resultados a nivel organizativo, de trabajador y de prestación de servicios. La información obtenida aporta evidencia de que aquellos ayuntamientos que desarrollan prácticas de reclutamiento y selección, formación, evaluación del rendimiento y retribución teniendo en cuenta las necesidades de los puestos concretos a cubrir, el potencial de los empleados y su rendimiento, mejoran sus resultados.

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El objetivo del presente trabajo de investigación es arrojar luz sobre los factores que explican la menor intencionalidad en la población femenina para involucrarse en procesos de creación de empresas. Para ello, se ha desarrollado un modelo de ecuaciones estructurales que identifica un conjunto de variables que permiten explicar la intención de emprender en la población potencialmente emprendedora. La validación del modelo se ha realizado mediante una encuesta realizada a 1222 estudiantes de 12 titulaciones diferentes de la Universidad de Málaga. La aplicación del modelo a las poblaciones masculina y femenina ha permitido apreciar diferencias significativas en los patrones de comportamiento en función del género, identificando un proceso más complejo y necesitado de apoyo externo en la población femenina con respecto a la masculina.

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Eterio Pajares, Raquel Merino y José Miguel Santamaría (eds.)

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目录

第一章 复合材料和复合结构在土木工程上的设计、应用和评价 王震鸣

第二章 先进复合材料在航空航天工业的应用与进展 赵稼祥

第三章 复合材料轴承 张恒 王震鸣

第四章 层压板壳分层屈曲破坏的二维模型分析 李思简

第五章 半解析法在复合材料力学与结构中的应用 范业立

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本书共有16篇论文,论述了国内外有关复合材料及其结构力学等方面新近进展的情况。如:复合材料及其结构的粘弹性力学、三相模型下复合材料的细观力学性质等。

目录

第一章 复合材料力学的统计断裂理论和单向复合材料的随机临界核理论

范赋群 曾庆敦

第一节 引言

第二节 纤维强度分布的统计特性

第三节 纤维束的统计分析

第四节 链式模型

第五节 单向复合材料纵向拉伸的破坏形式

第六节 应力集中因子

第七节 复合材料力学的统计断裂理论

第八节 杂交(混杂)复合材料的统计分析

第九节 单向复合材料的随机临界核理论

参考文献

第二章 含夹杂脆性基体复合材料的几个力学问题&杜善义 韩杰才

第一节 引言

第二节 脆性基体含脆性夹杂的微结构力学

第三节 含随机分布晶须和微裂纹的脆性复合材料本构关系

第四节 含随机分布相变夹杂的陶瓷复合材料增韧

第五节 脆性基体含延性夹杂的增韧分析

第六节 结束语

参考文献

第三章 复合材料及其结构的粘弹性力学&张恒 王震鸣 李江

第一节 引言

第二节 聚合物材料的粘弹性本构关系

第三节 复合材料的粘弹性本构方程

第四节 动态粘弹性性能研究

第五节 复合材料结构粘弹性问题的求解

参考文献

第四章 复合材料含孔层合板拉伸强度的分析方法&李顺林 熊中侃

第一节 引言

第二节 应力集中系数法

第三节 材料力学分析模型法

第四节 断裂力学分析模型法

第五节 复合材料力学分析模型法

参考文献

第五章 纤维束及其单向复合材料应变率相关的统计本构理论研究

夏源明 杨报昌

第一节 引言

第二节 冲击拉伸试验技术

第三节 组分材料的应变率相关性

第四节 单向纤维增强复合材料的应变率相关性

第五节 环境影响

第六节 展望

参考文献

第六章 复合材料层合结构层间应力的计算研究&顾德淦

第一节 引言

第二节 线弹性均匀拉伸模型的计算

第三节 其它线弹性模型的计算

第四节 非线性弹性模型的计算

第五节 弹塑性模型的计算

第六节 结语

参考文献

第七章 纤维增强复合材料的细观压缩失稳&魏悦广 杨卫

第一节 引言

第二节 细观压缩失稳的研究概况

第三节 平面弹塑性失稳理论

第四节 贯穿折曲带

第五节 表面失稳与扩展折曲带

第六节 压缩失稳模式的缺陷敏感性

第七节 水平破坏带的扩展

第八节 承压复合材料的增强与增韧

参考文献

第八章 复合材料在复杂加载下的强度与损伤研究&王兴业 杨光松

第一节 引言

第二节 复合材料在复杂应力状态下的强度问题

第三节 复合材料张量多项式强度准则的分析

第四节 张量多项式强度准则相互作用系数确定方法的探讨

第五节 复合材料在复杂应力状态下强度准则的实验研究

第六节 复合材料在双向载荷下的损伤

参考文献

第九章 任意铺设复合材料层板在复杂载荷下的屈曲与后屈曲分析

曹大卫 成广民 马兰芝

第一节 引言

第二节 不对称层板屈曲、后屈曲的能量表达式

第三节 应用Rayleigh-Ritz法解屈曲与屈曲后问题

第四节 算例与讨论

参考文献

第十章 复合材料柱型壳的铺层优化和初始后屈曲特性&孙国钧

第一节 引言

第二节 80年代复合材料圆柱壳铺层优化的研究进展

第三节 组合载荷作用下层合圆柱壳的铺层优化和实验研究

第四节 双向铺设层合圆柱壳的优化设计

第五节 复合材料加筋圆柱壳的优化设计

第六节 复合材料椭圆柱壳在轴压下的稳定性

参考文献

第十一章 三相模型下复合材料的细观力学性质&罗海安

第一节 引言

第二节 三相模型下的Eshelby张量与修正的Mori-Tanaka方法

第三节 三相柱形模型下的刃型位错

第四节 三相模型下纤维增强复合材料的基体裂纹

第五节 三相模型下纤维增强复合材料的界面裂纹

第六节 结论

参考文献

第十二章 复合材料结构连接的应力分析&吴代华 晏石林

第一节 引言

第二节 复合材料胶接接头分析

第三节 复合材料机械接头分析

参考文献

第十三章 复合材料及其结构的湿热效应研究&陈浩然 息志臣 孙延波

第一节 引言

第二节 湿热瞬态分析

第三节 热自由边界效应

第四节 湿热变形和湿热应力

参考文献

第十四章 用加权残值法分析计算不同边界条件下层板的屈曲问题&李卓球

第一节 引言

第二节 层板非线性弹性的屈曲计算与分析

第三节 层合圆柱曲板的非线性弹性屈曲

第四节 用加权残值法计算层板的后屈曲问题

第五节 层板高阶剪切变形理论的屈曲分析

参考文献

第十五章 复合材料多连通板的应力场计算&林佳铿 王林江

第一节 引言

第二节 分析方法

第三节 算例

第四节 讨论和结论

参考文献

第十六章 基体对玻璃纤维缠绕火箭发动机壳体强度影响机理的研究

嵇醒 卢天健 顾星若

第一节 引言

第二节 实验结果分析

第三节 有限元分析

第四节 实验验证

第五节 最佳平衡系数K?

第六节 环氧复合材料基体的层间剪切强度

第七节 层间剪切破坏的扫描电镜观察

第八节 结语

参考文献