Foreword |
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xiii | (2) |
Preface |
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xv | (2) |
Acknowledgments |
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xvii | |
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1. Occupational Biomechanics as a Specialty |
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1 | (16) |
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1.1 Definition of Occupational Biomechanics |
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1 | (1) |
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1.2 Historical Development of Occupational Biomechanics |
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2 | (5) |
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1.2.1 Kinesiological Developments |
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4 | (2) |
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1.2.2 Developments in Biomechanical Modelling |
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6 | (1) |
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1.2.3 Anthropometric Developments |
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6 | (1) |
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1.2.4 Methods for Evaluating Mechanical Work Capacity |
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6 | (1) |
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1.2.5 Developments in Bioinstrumentation |
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7 | (1) |
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1.2.6 Developments in Motion Classification and Time Prediction Systems |
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7 | (1) |
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1.3 The Need for an Occupational Biomechanics Specialty |
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7 | (4) |
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1.3.1 Epidemiological Support for Occupational Biomechanics |
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8 | (2) |
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1.3.2 Social and Legal Support for Occupational Biomechanics |
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10 | (1) |
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1.3.3 Ergonomic Support for Occupational Biomechanics |
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10 | (1) |
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1.4 Who Uses Occupational Biomechanics? |
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11 | (1) |
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1.5 Organization of the Book |
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12 | (1) |
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13 | (1) |
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13 | (4) |
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2. The Structure and Function of the Musculoskeletal System |
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17 | (48) |
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17 | (1) |
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17 | (11) |
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2.2.1 Ligaments, Tendons, and Fascia |
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18 | (4) |
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22 | (1) |
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22 | (6) |
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28 | (26) |
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2.3.1 The Structure of Muscles |
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29 | (5) |
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2.3.2 The Molecular Basis of Muscle Contraction |
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34 | (1) |
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2.3.3 The Energy Metabolism of Muscle |
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35 | (1) |
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2.3.4 The Nerve Impulse Causing Muscle Contraction |
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36 | (1) |
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2.3.5 Mechanical Aspects of Muscle Contraction |
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37 | (6) |
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43 | (5) |
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2.3.7 Quantification and Prediction of Fatigue |
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48 | (2) |
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2.3.8 The Action of Muscles |
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50 | (4) |
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54 | (6) |
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54 | (3) |
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57 | (1) |
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58 | (1) |
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2.4.4 Intervertebral Discs |
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59 | (1) |
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60 | (1) |
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61 | (4) |
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3. Anthropometry in Occupational Biomechanics |
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65 | (26) |
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3.1 Measurement of Physical Properties of Body Segments |
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65 | (15) |
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3.1.1 Body-Segment Link Length Measurement Methods |
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66 | (5) |
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3.1.2 Body-Segment Volume and Weight |
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71 | (1) |
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3.1.3 Body-Segment Locations of Center of Mass |
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72 | (3) |
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3.1.4 Body-Segment Inertial Property Measurement Methods |
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75 | (5) |
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3.2 Anthropometric Data for Biomechanical Studies in Industry |
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80 | (7) |
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3.2.1 Segment Link Length Data |
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80 | (1) |
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3.2.2 Segment Weight Data |
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81 | (3) |
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3.2.3 Segment Mass-Center Location Data |
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84 | (1) |
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3.2.4 Segment Moment-of-Inertia and Radius-of-Gyration Data |
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84 | (3) |
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3.3 Summary of Anthropometry in Occupational Biomechanics |
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87 | (1) |
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87 | (1) |
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88 | (3) |
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4. Mechanical Work-Capacity Evaluation |
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91 | (40) |
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91 | (1) |
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4.2 Joint Motion: Methods and Data |
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91 | (10) |
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4.2.1 Methods of Measuring Joint Motion |
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93 | (4) |
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4.2.2 Normal Ranges of Joint Motion |
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97 | (1) |
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4.2.3 Factors Affecting Range-of-Motion Data |
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97 | (4) |
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4.3 Muscle Strength Evaluation |
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101 | (23) |
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4.3.1 Definition of Muscular Strength |
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101 | (4) |
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4.3.2 Static and Dynamic Strength-Testing Methods |
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105 | (7) |
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4.3.3 Normal Muscle Strength Values |
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112 | (8) |
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4.3.4 Personal Factors Affecting Strength |
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120 | (4) |
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4.4 Summary and Limitations of Mechanical Work-Capacity Data |
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124 | (1) |
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125 | (1) |
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126 | (5) |
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5. Bioinstrumentation for Occupational Biomechanics |
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131 | (50) |
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131 | (1) |
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5.2 Human Motion Analysis Systems |
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132 | (14) |
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5.2.1 Basis for Measuring Human Motion |
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132 | (14) |
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5.3 Applied Electromyography |
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146 | (7) |
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5.3.1 Theory of the Use of Electromyography in Occupational Biomechanics |
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146 | (4) |
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5.3.2 EMG Measurement System |
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150 | (3) |
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5.4 Muscle Strength Measurement Systems |
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153 | (5) |
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5.4.1 Localized Static Strength Measurement Systems |
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153 | (2) |
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5.4.2 Whole-Body Static Strength Measurement System |
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155 | (1) |
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5.4.3 Whole-Body Dynamic Strength Measurement System |
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156 | (2) |
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5.5 Intradiscal Pressure Measurement |
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158 | (3) |
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5.5.1 Measurement Concept |
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158 | (2) |
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5.5.2 Intradiscal Pressure Measurement System |
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160 | (1) |
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5.5.3 Applications and Limitations in Occupational Biomechanics |
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160 | (1) |
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5.6 Intra-abdominal (Intragastric) Measurements |
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161 | (4) |
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5.6.1 Measurement Development |
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161 | (1) |
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162 | (1) |
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5.6.3 Applications and Limitations in Occupational Biomechanics |
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162 | (3) |
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5.7 Stature Measurement System |
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165 | (2) |
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5.8 Force Platform System |
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167 | (1) |
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5.9 Measurement of Vibration in Humans |
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168 | (2) |
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170 | (1) |
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170 | (11) |
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6. Occupational Biomechanical Models |
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181 | (98) |
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181 | (1) |
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6.2 Planar Static Biomechanical Models |
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182 | (23) |
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6.2.1 Single-Body-Segment Static Model |
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182 | (6) |
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6.2.2 Two-Body-Segment Static Model |
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188 | (4) |
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6.2.3 Static Planar Model of Nonparallel Forces |
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192 | (2) |
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6.2.4 Planar Static Analysis of Internal Forces |
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194 | (7) |
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6.2.5 Multiple-Link Coplanar Static Modeling |
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201 | (4) |
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6.3 Three-Dimensional Modeling of Static Strength |
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205 | (5) |
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6.4 Dynamic Biomechanical Models |
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210 | (13) |
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6.4.1 Single-Segment Dynamic Biomechanical Model |
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211 | (4) |
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6.4.2 Multiple-Segment Biodynamic Model of Load Lifting |
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215 | (4) |
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6.4.3 Coplanar Biomechanical Models of Foot Slip Potential while Pushing a Cart |
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219 | (4) |
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6.5 Special Purpose Biomechanical Models of Occupational Tasks |
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223 | (44) |
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6.5.1 Low-Back Biomechanical Models |
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224 | (28) |
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6.5.2 Biomechanical Models of the Wrist and Hand |
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252 | (9) |
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6.5.3 Modeling Muscle Strength |
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261 | (6) |
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6.6 Future Developments in Occupational Biomechanical Models |
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267 | (1) |
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268 | (1) |
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269 | (10) |
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7. Methods of Classifying and Evaluating Manual Work |
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279 | (36) |
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279 | (4) |
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7.1.1 Historical Perceptive |
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282 | (1) |
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7.2 Traditional Work Analysis System |
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283 | (5) |
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7.2.1 MTM: An Example of a Predetermined Motion-Time System |
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283 | (2) |
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7.2.2 Benefits and Limitations in Contemporary Work Analysis Systems |
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285 | (3) |
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7.3 Contemporary Biomechanical Job Analysis |
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288 | (21) |
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7.3.1 Identification of Musculoskeletal Injury Problem |
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288 | (3) |
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7.3.2 Analyzing Biomechanical Risk Factors |
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291 | (1) |
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7.3.3 Specialized Biomechanical Risk Factor Evaluation |
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291 | (17) |
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7.3.4 EMGs in Job Evaluations |
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308 | (1) |
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7.4 Future Impact of Occupational Biomechanics on Work Measurement Systems |
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309 | (1) |
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310 | (1) |
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311 | (4) |
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8. Manual Material-Handling Limits |
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315 | (34) |
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315 | (3) |
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8.2 Lifting Limits in Manual Material Handling |
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318 | (11) |
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8.2.1 Scope of NIOSH Work Practices Guide for Manual Lifting |
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321 | (1) |
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8.2.2 Basis for 1994 NIOSH Recommended Weight-Lifting Limit |
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322 | (2) |
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8.2.3 Example of NIOSH RWL Procedure |
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324 | (2) |
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8.2.4 Comments on the Status of the NIOSH Lifting Guide |
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326 | (1) |
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8.2.5 Alternative Recommendations for Evaluating Manual Lifting Tasks |
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327 | (2) |
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8.3 Pushing and Pulling Capabilities |
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329 | (7) |
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8.3.1 Foot-Slip Prevention during Pushing and Pulling |
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334 | (2) |
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8.4 Asymmetric Load Handling |
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336 | (12) |
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8.4.1 Toward a Comprehensive Manual Material-Handling Guide |
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339 | (9) |
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8.5 Summary of Manual Material-Handling Recommendations and Evaluation Methods |
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348 | (1) |
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349 | (1) |
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349 | (1) |
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349 | (44) |
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9.1 General Considerations Related to Sitting Postures |
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355 | (4) |
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9.2 Anthropometric Aspects of Seated Workers |
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359 | (2) |
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361 | (2) |
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9.4 The Spine and Sitting |
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363 | (12) |
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9.4.1 Clinical Aspects of Sitting Postures |
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363 | (1) |
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364 | (2) |
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9.4.3 Disc Pressure Data During Sitting |
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366 | (4) |
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370 | (3) |
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9.4.5 Sitting Postures and the Spine |
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373 | (2) |
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9.5 The Shoulder and Sitting |
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375 | (2) |
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377 | (3) |
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9.7 The Sitting Workplace |
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380 | (6) |
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383 | |
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9.7.3 Visual Display Terminal Workstations |
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385 | (1) |
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386 | (1) |
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386 | (1) |
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387 | (6) |
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10. Biomechanical Considerations in Machine Control and Workplace Design |
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393 | (42) |
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393 | (8) |
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10.1.1 Localized Musculoskeletal Injury in Industry |
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394 | (7) |
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10.2 Practical Guidelines for Workplace and Machine Control Layout |
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401 | (25) |
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10.2.1 Shoulder-Dependent Overhead Reach Limitations |
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401 | (10) |
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10.2.2 Shoulder- and Arm-Dependent Forward Reach Limits |
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411 | (7) |
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10.2.3 Neck-Head Posture Work Limitations |
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418 | (4) |
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10.2.4 Torso Postural Considerations in Workbench Height Limitations |
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422 | (2) |
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10.2.5 Biomechanical Considerations in Design of Computer Workstation |
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424 | (2) |
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426 | (2) |
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428 | (1) |
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428 | (7) |
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11. Hand-Tool Design Guidelines |
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435 | (28) |
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11.1 The Need for Biomechanical Concepts in Hand-Tool Design |
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436 | (3) |
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11.2 Shape and Size Considerations |
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439 | (11) |
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11.2.1 Shape for Avoiding Wrist Deviation |
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439 | (4) |
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11.2.2 Shape for Avoiding Shoulder Abduction |
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443 | (1) |
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11.2.3 Shape to Assist Grip |
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444 | (3) |
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11.2.4 Size of Tool Handle to Facilitate Grip |
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447 | (1) |
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11.2.5 Finger Clearance Considerations |
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448 | (1) |
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449 | (1) |
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11.3 Hand-Tool Weight and Use Considerations |
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450 | (3) |
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11.4 Force Reaction Considerations in Powered Hand-Tool Design |
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453 | (1) |
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11.5 Keyboard Design Considerations |
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454 | |
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11.5.2 Keying Exertion Force Repetition |
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455 | (1) |
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456 | (1) |
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456 | (1) |
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457 | (6) |
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12. Guidelines for Whole-Body and Segmental Vibration |
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463 | (38) |
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12.1 Definitions and Measures |
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463 | (8) |
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464 | (3) |
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12.1.2 Measurement of Vibration |
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467 | (4) |
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12.2 General Effects of Vibration on Human Beings |
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471 | (1) |
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12.3 Whole-Body Vibration |
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472 | (9) |
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12.3.1 Effects of Low-Frequency Vibration |
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472 | (1) |
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12.3.2 Effects of Middle-Frequency Vibration |
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473 | (4) |
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12.3.3 Biomechanical Effects on the Spine |
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477 | (2) |
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12.3.4 Physiological Vibration |
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479 | (2) |
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481 | (4) |
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12.4.1 Transmission of Vibration in the Upper Extremity |
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481 | (2) |
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12.4.2 Hand-Arm Vibration Syndrome |
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483 | (2) |
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12.5 Sensorimotor Effects |
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485 | (3) |
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12.6 Vibration Exposure Criteria |
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488 | (5) |
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12.6.1 Whole-Body Vibration Recommendations |
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488 | (3) |
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12.6.2 Hand-Arm Vibration Recommendations |
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491 | (2) |
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12.7 Control and Prevention |
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493 | (2) |
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495 | (1) |
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495 | (6) |
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13. Worker Selection, Training, and Personal Protective Device Considerations |
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501 | (24) |
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502 | (8) |
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13.1.1 Introduction to Worker Selection |
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502 | (3) |
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13.1.2 History and Physical Examination |
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505 | (2) |
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13.1.3 Radiographic Preplacement Examination |
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507 | (1) |
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13.1.4 Quantitative Physical Preplacement Screening |
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507 | (3) |
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13.2 Preplacement Training |
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510 | (4) |
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13.2.1 General Content of Training |
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511 | (1) |
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13.2.2 How Workers Should be Trained |
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512 | (2) |
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13.3 Biomechanical Aspects of Back Belts |
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514 | (4) |
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13.3.1 Passive Stiffness Effects of Back Belts |
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515 | (1) |
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13.3.2 Abdominal Pressure Effects of Back Belts |
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516 | (1) |
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13.3.3 Reduced Torso Mobility Effects Due to Back Belts |
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517 | (1) |
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518 | (1) |
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518 | (1) |
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519 | (6) |
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525 | (4) |
Appendix A |
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529 | (10) |
Part 1: Anatomical and Anthropometric Landmarks as Presented by Webb Associates |
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529 | (3) |
Part 2: Glossary of Anatomical and Anthropometric Terms (Webb Associates, 1978) |
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532 | (7) |
Appendix B Population Weight and Mass-Center Data |
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539 | (6) |
Table B-1 Segment Weight Values Derived from Regression Equations Using Total Body Weight as the Independent Variable |
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540 | (1) |
Table B-2 Segment Moments of Inertia |
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541 | (1) |
Table B-3 Anatomical Location of Segment Centers of Gravity (Centers of Mass) |
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542 | (3) |
Appendix C Terms and Units of Measurement in Biomechanics |
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545 | (14) |
Appendix D NIOSH 1994 Tables for Conversion of Six Job-Lifting Descriptor Variables to Multiplier Values Used in Computing Recommended Weight Limit |
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559 | (4) |
Appendix E Tables |
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563 | (2) |
Table E-1 Recommended (90th Percentile) Male and Female Pushing Forces (N) for Initial (Peak) and Sustained (Average) Exertions with Handle Height at 95 cm (Male) and 90 cm (Female) |
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564 | (1) |
Table E-2 Recommended (90th Percentile) Male and Female Pulling Forces (N) for Initial (Peak) and Sustained (Average) Exertions with Handle Height at 95 cm (Male) and 90 cm (Female) |
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564 | (1) |
Index |
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565 | |