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1. |
Record Nr. |
UNINA9910745599303321 |
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Titolo |
Coal and energy in South Africa : considering a just transition / / edited by Lochner Marais, Phillippe Burger, Maléne Campbell, Stuart Paul Denoon-Stevens and Deidré van Rooyen [[electronic resource]] |
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Pubbl/distr/stampa |
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Edinburgh : , : Edinburgh University Press, , 2021 |
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©2022 |
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ISBN |
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1-3995-1352-4 |
1-4744-8707-6 |
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Descrizione fisica |
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1 online resource (260 p.) |
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Collana |
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Edinburgh studies in urban political economy |
Edinburgh scholarship online |
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Disciplina |
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Soggetti |
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Energy transition - South Africa - eMalahleni |
Energy development - South Africa - eMalahleni |
Coal mines and mining - South Africa - eMalahleni |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Also issued in print: 2021. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Frontmatter -- Contents -- Figures -- Tables -- Contributors -- Preface -- Acknowledgements -- Abbreviations -- CHAPTER 1 Mining and Mining Towns: A Conceptual Framework -- Chapter 2 What Is a Just Transition? -- Chapter 3 Mine Closure in the Coal Industry: Global and National Perspectives -- Chapter 4 Household Welfare in Emalahleni -- Chapter 5 Work and Life Satisfaction of Mining Employees -- Chapter 6 Informal Settlements in the Mining Context -- Chapter 7 Coal and Water: Exploiting One Precious Natural Resource at the Expense of Another? -- Chapter 8 The Health Impacts of Coal Mining and Coal-based Energy -- Chapter 9 Sustainability Reporting by Collieries -- Chapter 10 Residents’ Perceptions of Coal Mining and Energy Generation -- Chapter 11 Boom or Bust for Emalahleni Businesses? -- Chapter 12 Socio-economic Dynamics of the Informal Economy -- Chapter 13 A More Resilient Policy Approach to Spatial Fragmentation -- Chapter 14 Planning in the Dark -- Chapter 15 ‘The mines must fix the potholes’: A Desperate Community -- Chapter 16 Municipal Finances -- Chapter 17 Is a Just Transition Possible? -- Index |
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Sommario/riassunto |
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Taking the growing South African mining town of Emalahleni as a case study, this book investigates whether a just transition from coal-generated energy is possible and what the local implications of this global restructuring of the energy sector will be. |
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2. |
Record Nr. |
UNINA9910822496503321 |
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Titolo |
Handbook of troubleshooting plastics processes : a practical guide / / edited by John Wagner |
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Pubbl/distr/stampa |
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Hoboken, NJ, : Wiley, 2012 |
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ISBN |
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9781118511206 |
1118511204 |
9781283645317 |
1283645319 |
9781118511183 |
1118511182 |
9781118511169 |
1118511166 |
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Edizione |
[1st ed.] |
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Descrizione fisica |
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1 online resource (506 p.) |
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Classificazione |
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Altri autori (Persone) |
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Disciplina |
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Soggetti |
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Plastics - Molding |
Injection molding of plastics |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Handbook of Troubleshooting Plastics Processes: A Practical Guide; Contents; Preface; List of Contributors; Part 1: Troubleshooting Basics; 1 The Economics of Troubleshooting Polymer Processing Systems; 1.1 Introduction; 1.2 Economic Incentives and Necessities; 1.3 Troubleshooting Resources and Their Cost; 1.4 Managing Resources and Costs; 1.5 Troubleshooting Techniques and Their Relative Costs; 1.6 Case Histories; 1.6.1 Single Screw Extrusion Instability; 1.6.2 Compounding Extruder Catastrophic Failure; 1.6.3 Polymer Degradation During Melt Processing; 1.7 Conclusions; References |
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2 Troubleshooting Philosophy2.1 Introduction; 2.2 Troubleshooting Methodology; Bibliography; 3 Statistical Tools for Trouble Shooting a Process; 3.1 Introduction; 3.2 Basic Statistical Concepts; 3.2.1 Histogram; 3.2.2 Scatter Diagram; 3.3 Sample Mean and Standard Deviation; 3.4 Design of Experiments (DOE); 3.4.1 Factorial Design; 3.4.2 Fractional Factorial Design; 3.5 Process Capability; 3.6 Control Charts; 3.7.1 Central Limit Theorem; 3.7.2 Variable Data Control Charts; 3.7.3 Control Charts for Attribute Data; References; Bibliography; Statistics; Design of Experiments |
Statistical Process ControlPart 2: Extrusion Processes; 4 Single Screw Extrusion; 4.1 Introduction; 4.2 Process Description; References; 5 Troubleshooting the Co-rotating Fully Intermeshing Twin-screw Compounding System; 5.1 Introduction; 5.2 Equipment Description; 5.3 Troubleshooting; 5.3.1 What is Troubleshooting?; 5.4 Tools of the Successful Troubleshooter; 5.4.1 Experience; 5.4.2 Vent Flow Problem; 5.5 Product, Process and Equipment Knowledge; 5.5.1 High Discharge Pressure Problem; 5.5.2 Barrel Temperatures Higher than Set Points Problem; 5.5.3 Climbing Discharge Temperature Problem |
5.5.4 Gels and Un-melts in the Extrudate Problem5.5.5 Holes or Bubbles in the Extrudate Problem; 5.5.6 Process Surging Problem; 5.6 Conclusion; References; 6 Troubleshooting for Injection Molding; 6.1 Introduction; 6.1.1 The Basic Approach; 6.2 Understanding Temperature Control; 6.3 Product Shift to a Different Machine; 6.3.1 Calculate the New Pressure Settings; 6.3.2 Procedure; 6.4 Part Weight as an Analytical Tool; 6.4.1 Example - Part Weight for Process Variability Analysis; 6.4.2 Long Term Variability Analysis; 6.4.3 Short Term Variability Analysis; 6.4.4 Variability Evaluation |
6.4.5 Process Benchmarking for Quality6.4.6 Benchmark Evaluation; 6.4.7 Summary; 6.5 Part Weight as Dimensional Aimpoint Control; 6.5.1 Unconstrained Process; 6.5.2 Partially Constrained Process; 6.5.3 Constrained Process; 6.5.4 Warpage; 6.5.5 Relationship of Shot Weight and Hydraulic Pressure; 6.6 Determining the Gate Freeze-Off Time; 6.6.1 Procedure to Determine the Freeze-Off Point; 6.6.2 Time Analysis; 6.6.3 Pressure Procedure; References; 7 Blown Film; 7.1 Introduction; 7.2 Process Description; 7.2.1 Extruders; 7.2.2 Dies; 7.2.3 Process Cooling |
7.2.4 The Bubble Collapsing Process and Systems |
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Sommario/riassunto |
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This handbook provides a framework for understanding how to characterize plastic manufacturing processes for use in troubleshooting problems. The 21 chapters are authored by well-known and experienced engineers who have specialized knowledge about the processes covered in this practical guide. From the Preface: "In every chapter, the process is described and the most common problems are discussed along with the root causes and potential technical solutions. Numerous case studies are provided that illustrate the troubleshooting process. Mark A. Spalding, The Dow Chemical Compa |
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