926 resultados para Book 11
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Outcomes of a piece of research into the accessibility of e-books. LTD
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This is the report of the “DoF/NACA-STREAM/FAO Workshop on Livelihoods Approaches and Analysis” that was conducted in Yangon, Union of Myanmar from 11-15 May 2004. The purpose of the workshop was to develop and document mechanisms for training in livelihoods approaches and analysis, and to build national capacity to conduct livelihoods studies. The workshop in Yangon was the first STREAM event in Myanmar, with colleagues coming to participate from Yangon and many Divisions and States throughout the country. The workshop in Yangon was the fourth in a series, the first of which was held in Iloilo City, Philippines, in November 2003, the second in Ranchi, India, in February 2004, and the third in Vientiane, Lao PDR in March 2004. A subsequent workshop will take place in Yunnan, China. The objectives of the workshop were to: Understand issues of interest to people whose livelihoods include aquatic resources management, especially those with limited resources Build “(national) livelihoods teams” to do livelihoods analyses and training, and share their experiences with communities and other stakeholders Share understandings of livelihoods approaches and analysis using participatory methods Review current NACA-STREAM livelihoods analysis documentation, adapt and supplement, towards the drafting of a Guide for Livelihoods Analysis Experience the use of participatory tools for livelihoods analysis Plan activities for carrying out livelihoods analyses, and Consider how to build capacity in monitoring and evaluation (M&E) and “significant change”. (Pdf contains 56 pages).
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Executive Summary: Tropical marine ecosystems in the Caribbean region are inextricably linked through the movement of pollutants, nutrients, diseases, and other stressors, which threaten to further degrade coral reef communities. The magnitude of change that is occurring within the region is considerable, and solutions will require investigating pros and cons of networks of marine protected areas (MPAs), cooperation of neighboring countries, improved understanding of how external stressors degrade local marine resources, and ameliorating those stressors. Connectivity can be broadly defined as the exchange of materials (e.g., nutrients and pollutants), organisms, and genes and can be divided into: 1) genetic or evolutionary connectivity that concerns the exchange of organisms and genes, 2) demographic connectivity, which is the exchange of individuals among local groups, and 3) oceanographic connectivity, which includes flow of materials and circulation patterns and variability that underpin much of all these exchanges. Presently, we understand little about connectivity at specific locations beyond model outputs, and yet we must manage MPAs with connectivity in mind. A key to successful MPA management is how to most effectively work with scientists to acquire the information managers need. Oceanography connectivity is poorly understood, and even less is known about the shape of the dispersal curve for most species. Dispersal kernels differ for various systems, species, and life histories and are likely highly variable in space and time. Furthermore, the implications of different dispersal kernels on population dynamics and management of species is unknown. However, small dispersal kernels are the norm - not the exception. Linking patterns of dispersal to management options is difficult given the present state of knowledge. The behavioral component of larval dispersal has a major impact on where larvae settle. Individual larval behavior and life history details are required to produce meaningful simulations of population connectivity. Biological inputs are critical determinants of dispersal outcomes beyond what can be gleaned from models of passive dispersal. There is considerable temporal and spatial variation to connectivity patterns. New models are increasingly being developed, but these must be validated to understand upstream-downstream neighborhoods, dispersal corridors, stepping stones, and source/sink dynamics. At present, models are mainly useful for providing generalities and generating hypotheses. Low-technology approaches such as drifter vials and oceanographic drogues are useful, affordable options for understanding local connectivity. The “silver bullet” approach to MPA design may not be possible for several reasons. Genetic connectivity studies reveal divergent population genetic structures despite similar larval life histories. Historical stochasticity in reproduction and/or recruitment likely has important, longlasting consequences on present day genetic structure. (PDF has 200 pages.)
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Mugarri nº 10. Texos en euskera y castellano.
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A small scale project was funded to explore the accessibility of e-book platforms, offer specific confidential advice for participating partners and provide generic guidance for publishers and aggregators.
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Good practice guidance for publishers and procurers of e-book platforms based on the benefits and barriers identified by robust testing using real people with disabilities
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Apresenta as discussões realizadas na Câmara dos Deputados, sob a coordenação do Centro de Estudos e Debates Estratégicos (CEDES).
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The First SPARK-STREAM Workshop on Livelihoods and Languages took place in Bangkok, Thailand, from 9-11 April 2003. It was the first activity in a SPARK-STREAM learning and communications process around livelihoods and languages. (PDF contains 53 pages)
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以力学为主线而进行的多学科综合的研究。主要工作包括平台结构应力、加速度和风、浪、流环境的监测与分析,疲劳分析和寿命估算,极端环境条件下平台人员工作安全性评估,以及数据的采集和处理技术。研究结果给定了与海洋平台结构设计和运行安全密切相关的力学规律和重要资料,为平台结构的强度设计与评估提供了实用依据。
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本书系统地介绍了微/纳米力学测试技术中最常用的压入和划入技术及其典型应用。全书共分13章。测试技术方面,内容涉及接触力学、测试原理、方法、校准、仪器、力学参量、影响因素。典型应用方面,内容涉及在表面工程、微机电系统、生物、高聚物和金属玻璃等领域内的微/纳米力学行为的测试。本书可供力学、材料、物理、电子、机械、生物和化学等领域的研究人员、工程技术人员以及大专院校相关专业的师生参考。
目录
前言
第1章 绪论
1.1硬度的定义和分类
1.2纳米压入和划入技术的发展
1.3纳米压入和划入技术的特点
参考文献
第2章 压入接触力学
2.1弹性接触
2.1.1 Soeddon解
2.1.2锥形压针
2.1.3球形压针
2.1.4圆柱压针
2.2弹塑性接触
2.2.1塑性发生
2.2.2完全塑性
2.2.3材料响应
参考文献
第3章 纳米压入测试原理
3.1压入硬度和模量
3.2连续刚度测量
3.3载荷一深度数据确定的材料参数
3.3.1马氏硬度
3.3.2压入蠕变
3.3.3压入松弛
3.3.4压入弹性功和塑性功
参考文献
第4章 纳米压入测试方法
4.1压针类型
4.1.1玻氏压针
4.1.2立方角压针
4.1.3维氏压针
4.1.4努氏压针
4.1.5圆锥压针
4.1.6球形压针
4.1.7圆柱压针
4.1.8楔形压针
4.1.9考虑因素
4.2测试环节
4.2.1样品准备
4.2.2环境控制
4.2.3间距选择
4.2.4表面探测
4.2.5驱动方式
4.2.6测试步骤
4.2.7测试报告
参考文献
第5章 纳米压入的确认和校准
5.1直接确认和校准
5.2间接校准
5.3测试和校准的实例
参考文献
第6章 纳米压入和划入的测量仪器
6.1仪器技术指标的定义
6.2美国Mrs公司
6.3美国Hysitmn公司
6.4瑞士CSM公司
6.5英国MML公司
6.6澳大利亚CSIRO公司
6.7测量仪器的发展趋势
参考文献
第7章 力学参量的测量
7.1压入方式
7.1.1硬度和模量
7.1.2断裂韧度
7.1.3蠕变和粘弹行为
7.1.4压入应力??应变曲线
7.1.5加卸载曲线涉及的
部分现象
7.2划人方式
7.2.1块体材料
7.2.2薄膜材料
7.2.3粗糙度
7.3弯曲方式
7.3.1微悬臂梁静载弯曲
7.3.2微桥静载弯曲
7.3.3微结构疲劳
7.4吸引方式
7.5声发射测试
7.6温度测试
参考文献.
第8章 影响纳米压入测试的因素
8.1测试仪器的影响
8.1.1压针缺陷
8.1.2测试方法
8.1.3接触零点的确定
8.1.4载荷和位移的分辨力
8.2样品的表面状态和性质
8.2.1表面吸湿
8.2.2表面粗糙度
8.2.3残余应力
8.2.4凹陷和凸起变形
8.3纳米压入和划入测试所面临的问题
参考文献
第9章 在表面工程中的应用
9.1金属材料表面激光强化的力学表征
9.2硬质膜的力学和摩擦学性能评估
9.2.1显微硬度测试
9.2.2纳米压人测试
9.2.3纳米划入测试
9.2.4膜材的影响
参考文献
第10章 在微机电系统中的应用
10.1薄膜测试
10.1.1典型薄膜材料的硬度和模量
10.1.2薄膜疲劳
10.1.3淀积工艺对二氧化硅薄膜力学性质的影响
10.2微结构弯曲
10.2.1微结构的静态弯曲
10.2.2微结构的动态弯曲
参考文献
第11章 在生物及其相关材料中的应用
11.1人工林杉木管胞细胞壁
11.2人体腰椎骨
11.3存储液对人体牙齿微力学性能的影响
参考文献
第12章 在高聚物中的应用
12.1PMMA单轴拉伸和弯曲力学行为
12.2划入测试的理论分析
12.3韧性行为的描述
12.4脆性行为的描述
12.4.1温度效应
12.4.2应变率效应
参考文献
第13章 在金属玻璃中的应用
13.1硬度和屈服应力的关系
13.2不连续的塑性变形
13.3压痕形貌和微结构变化
13.4应变率效应
13.5钕基金属玻璃的变形行为
参考文献
附录 常见问题的回答
1测试数量
2压入间距
3压入深度
4泊松比的选择
5典型材料的参数
6断裂韧度测试压针的选择
7纳米薄膜的测试
8典型材料的压入变形行为
9显微硬度和纳米压入硬度的关系
10压入影响区及其边界效应
10.1压入影响区的有限元模拟
10.2边界距离影响的有限元模拟
10.3压人间距影响的测试
参考文献
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本书阐明了板壳断裂理论的基础。论证了Reissner型板壳断裂理论的科学性、经典板壳断裂理论的缺陷及在一定范围内仍具有的实用价值;介绍了作者所创意的研究Reissner型板壳断裂纹尖端场的方法等。
目录
- §1.1 板壳弯曲断裂问题
- §1.2 Kirchhoff经典板壳弯曲断裂理论
- §1.3 Reissner型板壳弯曲断裂理论
- §1.4 Kirchhoff与Reissner型板壳弯曲断裂理论的比较
- §1.5 含裂纹有限尺寸板壳断裂分析的局部-整体法
- §1.6 含表面裂纹板壳
- §2.1 Kirchhoff板的基本概念和基本假定
- §2.2 基本公式与弹性曲面微分方程
- §2.3 边界条件
- §2.4 弹性薄板的应变能
- §2.5 极坐标下的挠曲面微分方程与内力公式
- §2.6 裂纹尖端场特征展开式通项公式
- §2.7 Kirchhoff板弯曲应力强度因子
- §3.1 基本方程和公式的复变函数表示
- §3.2 所引入函数的确定程度与一般形式
- §3.3 坐标变换与边界条件
- §3.4 运用保角变换方法求解孔口问题
- §3.5 应力强度因子与函数Φ(z)的关系
- §3.6 复变-主部分析法之应用简例
- §3.7 共直线裂纹问题的一般解答
- §3.8 典型弯曲裂纹问题的解答及弯曲应力强度因子公式
- §3.9 共圆曲线裂纹问题的解答及弯曲应力强度因子公式
- §4.1 裂纹尖端奇异元的位移模式与弯曲应力强度因子
- §4.2 裂纹尖端奇异元的刚度矩阵
- §4.3 裂纹尖端奇异元与常规单元的连接
- §4.4 解析法与数值法的结果比较与讨论
- §4.5 两共线半无限裂纹问题的定解条件及解的实用价值
- §5.1 Reissner型板的基本假定
- §5.2 Reissner型板的基本公式与平衡微分方程
- §5.3 基本方程的简化
- §5.4 边界条件
- §5.5 极坐标下的基本公式与平衡微分方程
- §5.6 两种平板理论用于无裂纹板时的比较
- §5.7 两种乎板理论用于含裂纹板时的比较
- §6.1 基本方程和一般求解方法
- §9.1 局部-整体法与其它解析和数值法的结果比较
- §9.2 边界对应力强度因子的影响
- §9.3 板的支承条件及长宽比的影响
- §9.5 计算Reissner型板应力强度因子的一组近似方程与近似解法
- §9.4 Reissner型板理论与Kirchhoff板理论所得应力强度因子的比较
- §9.6 关于数值计算的几点讨论
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Table of Contents
1 | Introduction | 1 |
1.1 | What is an Adiabatic Shear Band? | 1 |
1.2 | The Importance of Adiabatic Shear Bands | 6 |
1.3 | Where Adiabatic Shear Bands Occur | 10 |
1.4 | Historical Aspects of Shear Bands | 11 |
1.5 | Adiabatic Shear Bands and Fracture Maps | 14 |
1.6 | Scope of the Book | 20 |
2 | Characteristic Aspects of Adiabatic Shear Bands | 24 |
2.1 | General Features | 24 |
2.2 | Deformed Bands | 27 |
2.3 | Transformed Bands | 28 |
2.4 | Variables Relevant to Adiabatic Shear Banding | 35 |
2.5 | Adiabatic Shear Bands in Non-Metals | 44 |
3 | Fracture and Damage Related to Adiabatic Shear Bands | 54 |
3.1 | Adiabatic Shear Band Induced Fracture | 54 |
3.2 | Microscopic Damage in Adiabatic Shear Bands | 57 |
3.3 | Metallurgical Implications | 69 |
3.4 | Effects of Stress State | 73 |
4 | Testing Methods | 76 |
4.1 | General Requirements and Remarks | 76 |
4.2 | Dynamic Torsion Tests | 80 |
4.3 | Dynamic Compression Tests | 91 |
4.4 | Contained Cylinder Tests | 95 |
4.5 | Transient Measurements | 98 |
5 | Constitutive Equations | 104 |
5.1 | Effect of Strain Rate on Stress-Strain Behaviour | 104 |
5.2 | Strain-Rate History Effects | 110 |
5.3 | Effect of Temperature on Stress-Strain Behaviour | 114 |
5.4 | Constitutive Equations for Non-Metals | 124 |
6 | Occurrence of Adiabatic Shear Bands | 125 |
6.1 | Empirical Criteria | 125 |
6.2 | One-Dimensional Equations and Linear Instability Analysis | 134 |
6.3 | Localization Analysis | 140 |
6.4 | Experimental Verification | 146 |
7 | Formation and Evolution of Shear Bands | 155 |
7.1 | Post-Instability Phenomena | 156 |
7.2 | Scaling and Approximations | 162 |
7.3 | Wave Trapping and Viscous Dissipation | 167 |
7.4 | The Intermediate Stage and the Formation of Adiabatic Shear Bands | 171 |
7.5 | Late Stage Behaviour and Post-Mortem Morphology | 179 |
7.6 | Adiabatic Shear Bands in Multi-Dimensional Stress States | 187 |
8 | Numerical Studies of Adiabatic Shear Bands | 194 |
8.1 | Objects, Problems and Techniques Involved in Numerical Simulations | 194 |
8.2 | One-Dimensional Simulation of Adiabatic Shear Banding | 199 |
8.3 | Simulation with Adaptive Finite Element Methods | 213 |
8.4 | Adiabatic Shear Bands in the Plane Strain Stress State | 218 |
9 | Selected Topics in Impact Dynamics | 229 |
9.1 | Planar Impact | 230 |
9.2 | Fragmentation | 237 |
9.3 | Penetration | 244 |
9.4 | Erosion | 255 |
9.5 | Ignition of Explosives | 261 |
9.6 | Explosive Welding | 268 |
10 | Selected Topics in Metalworking | 273 |
10.1 | Classification of Processes | 273 |
10.2 | Upsetting | 276 |
10.3 | Metalcutting | 286 |
10.4 | Blanking | 293 |
Appendices | 297 | |
A | Quick Reference | 298 |
B | Specific Heat and Thermal Conductivity | 301 |
C | Thermal Softening and Related Temperature Dependence | 312 |
D | Materials Showing Adiabatic Shear Bands | 335 |
E | Specification of Selected Materials Showing Adiabatic Shear Bands | 341 |
F | Conversion Factors | 357 |
References | 358 | |
Author Index | 369 | |
Subject Index | 375 |
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Analisa o Substitutivo ao PL 2177/111 que Institui o Código Nacional de Ciência, Tecnologia e Inovação (Código de CT&I) que busca incentivar o desenvolvimento do setor através de dois grandes eixos: i) a simplificação de processos administrativos, de pessoal e financeiro nas instituições públicas de pesquisa, e; ii) a integração de empresas privadas ao sistema público de pesquisa.
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The swordfish, Xiphias gladius, is a large migratory oceanic species. It is widely distributed in tropical, temperate, and sometimes cold waters of all oceans, and is usually found in areas with sea-surface temperatures above 13°C. It can reach a maximum size of 540 kg, and is a favorite food fish in many countries. It is excellent for steaks, canning, or teriyaki, the Japanese dish of meat grilled with sugar, soy sauce, and rice wine. Swordfish is harvested commercially throughout its distribution, in both coastal and high-seas fisheries. Sport fisheries for swordfish are very small compared to those for other billfishes, accounting for no more than a few hundred fish per year. (PDF file contains 284 pages.)