http://www.rssboard.org/rss-specification 720 Recent lma_gmg items https://escholarship.org/uc/lma_gmg/rss Recent eScholarship items from Green Manufacturing and Sustainable Manufacturing Partnership Tue, 23 Jun 2026 05:41:44 +0000 Impact of the manufacturing phase on the life cycle of machined products https://escholarship.org/uc/item/5rs7n92f Impact of the manufacturing phase on the life cycle of machined products https://escholarship.org/uc/item/5rs7n92f Tue, 19 Aug 2014 00:00:00 +0000 Diaz, Nancy Helu, Moneer Ninomiya, Kevin Dornfeld, David Micromachining and Burr Formation for Precision Mechanical Components https://escholarship.org/uc/item/2jv2x7wn Micromachining and Burr Formation for Precision Mechanical Components https://escholarship.org/uc/item/2jv2x7wn Tue, 19 Aug 2014 00:00:00 +0000 Hartnett, J. Min, S. Dornfeld, D. A Usability Assessment of the Engineering Pathway Educational Digital Library  https://escholarship.org/uc/item/84k4034s A Usability Assessment of the Engineering Pathway Educational Digital Library  https://escholarship.org/uc/item/84k4034s Wed, 13 Aug 2014 00:00:00 +0000 Robinson, Stefanie L. Environmental Impact Characterization of Milling and Implications for Potential Energy Savings in Industry https://escholarship.org/uc/item/8xg6g8xt Environmental Impact Characterization of Milling and Implications for Potential Energy Savings in Industry https://escholarship.org/uc/item/8xg6g8xt Tue, 29 Jul 2014 00:00:00 +0000 Diaz, Nancy Ninomiya, Kevin Noble, Joanna Dornfeld, David Quantifying the Improvements in Rapid Prototyping and Product Life Cycle Performance Created by Machining https://escholarship.org/uc/item/5fj0343s Quantifying the Improvements in Rapid Prototyping and Product Life Cycle Performance Created by Machining https://escholarship.org/uc/item/5fj0343s Tue, 29 Jul 2014 00:00:00 +0000 Helu, Moneer Noble, Joanna McKinstry, Katherine Hoople, Gordon Rolfe, David Berthold, Dennis Ninomiya, Kevin Dornfeld, David Micromachining and Burr Formation for Precision Components https://escholarship.org/uc/item/4cq8c54b Micromachining and Burr Formation for Precision Components https://escholarship.org/uc/item/4cq8c54b Tue, 29 Jul 2014 00:00:00 +0000 Dornfeld, David Micromachining and Burr Formation for Precision Components https://escholarship.org/uc/item/0hz9v950 Micromachining and Burr Formation for Precision Components https://escholarship.org/uc/item/0hz9v950 Tue, 29 Jul 2014 00:00:00 +0000 Hartnett, Jeffrey Min, Sangkee Dornfeld, David Micromachining and Burr Formation for Precision Components https://escholarship.org/uc/item/0ht5666c Micromachining and Burr Formation for Precision Components https://escholarship.org/uc/item/0ht5666c Tue, 29 Jul 2014 00:00:00 +0000 Hartnett, Jeffrey Min, Sangkee Dornfeld, David Review of the Impacts of Crumb Rubber in Artificial Turf Applications https://escholarship.org/uc/item/9zp430wp Review of the Impacts of Crumb Rubber in Artificial Turf Applications https://escholarship.org/uc/item/9zp430wp Wed, 16 Jul 2014 00:00:00 +0000 Simon, Rachel Evaluating the End-of-Life Phase of Consumer Electronics:Methods and Tools to Improve Product Design and Material Recovery https://escholarship.org/uc/item/9tj3t93z Evaluating the End-of-Life Phase of Consumer Electronics:Methods and Tools to Improve Product Design and Material Recovery https://escholarship.org/uc/item/9tj3t93z Wed, 16 Jul 2014 00:00:00 +0000 Mangold, Jennifer Ann ImpactMap: Designing Sustainable Supply Chains by Incorporating Data Uncertainty https://escholarship.org/uc/item/9399w8zf ImpactMap: Designing Sustainable Supply Chains by Incorporating Data Uncertainty https://escholarship.org/uc/item/9399w8zf Wed, 16 Jul 2014 00:00:00 +0000 Fuge, Mark McKinstry, Katherine Ninomiya, Kevin Understanding Life Cycle Social Impacts in Manufacturing: A processed-based approach https://escholarship.org/uc/item/84z0z75t Understanding Life Cycle Social Impacts in Manufacturing: A processed-based approach https://escholarship.org/uc/item/84z0z75t Wed, 16 Jul 2014 00:00:00 +0000 Hutchins, Margot J. Robinson, Stefanie L. Dornfeld, David Implementing Engineering and Sustainability Curriculum in K-12 Education https://escholarship.org/uc/item/75x445xn Implementing Engineering and Sustainability Curriculum in K-12 Education https://escholarship.org/uc/item/75x445xn Wed, 16 Jul 2014 00:00:00 +0000 Robinson, Stefanie L. Mangold, Jennifer A. Packaging and the Supply Chain: A Look at Transportation https://escholarship.org/uc/item/6z21f6tn Packaging and the Supply Chain: A Look at Transportation https://escholarship.org/uc/item/6z21f6tn Wed, 16 Jul 2014 00:00:00 +0000 Simon, Rachel Chen, Yifen Wireless Sensor Networks for Home Health Care https://escholarship.org/uc/item/66s822jk Wireless Sensor Networks for Home Health Care https://escholarship.org/uc/item/66s822jk Wed, 16 Jul 2014 00:00:00 +0000 Baker, Chris R. Armijo, Kenneth Belka, Simon Benhabib, Merwan Bhargava, Vikas Burkhart, Nathan Minassians, Artin D. Dervisoglu, Gunes Gutnik, Lilia Haick, M. B. Ho, Christine Koplow, Mike Mangold, Jennifer Robinson, Stefanie Rosa, Matt Schwartz, Miclas Sims, Christo Stoffregen, Hanns Waterbury, Andrew Leland, Eli S. Pering, Trevor Wright, Paul K. Framework for Modeling the Uncertainty of Future Events in Life Cycle Assessment https://escholarship.org/uc/item/5g43f9kv Framework for Modeling the Uncertainty of Future Events in Life Cycle Assessment https://escholarship.org/uc/item/5g43f9kv Wed, 16 Jul 2014 00:00:00 +0000 Chen, Yi-Fen Simon, Rachel Dornfeld, David Total cost analysis of process time reduction as a green machining strategy https://escholarship.org/uc/item/5b6395c6 Total cost analysis of process time reduction as a green machining strategy https://escholarship.org/uc/item/5b6395c6 Wed, 16 Jul 2014 00:00:00 +0000 Helu, Moneer Behmann, Benjamin Meier, Harald Dornfeld, David Lanza, Gisela Schulze, Volker Environmental Assessment of Information Technology Products Using a Triage Approach https://escholarship.org/uc/item/4q51z64m Environmental Assessment of Information Technology Products Using a Triage Approach https://escholarship.org/uc/item/4q51z64m Wed, 16 Jul 2014 00:00:00 +0000 Zgola, Melissa L. Olivetti, Elsa A. Weber, Christopher Boyd, Sarah Mangold, Jennifer Abedrabbo, Ramzy Williams, Eric Gregory, Jeremy Kirchain, Randolph E. Knowledge-Based Evolutionary Linkage in MEMS Design Synthesis https://escholarship.org/uc/item/3nt1r0zh Knowledge-Based Evolutionary Linkage in MEMS Design Synthesis https://escholarship.org/uc/item/3nt1r0zh Wed, 16 Jul 2014 00:00:00 +0000 Cobb, Corie L. Zhang, Ying Agogino, Alice M. Mangold, Jennifer Impact of green machining strategies on achieved surface quality https://escholarship.org/uc/item/3634529v Impact of green machining strategies on achieved surface quality https://escholarship.org/uc/item/3634529v Wed, 16 Jul 2014 00:00:00 +0000 Helu, Moneer Behmann, Benjamin Meier, Harald Dornfeld, David Lanza, Gisela Schulze, Volker Mapping the Life Cycle Analysis and Sustainability Impact of Design for Environment Principles https://escholarship.org/uc/item/2mv6d6h6 Mapping the Life Cycle Analysis and Sustainability Impact of Design for Environment Principles https://escholarship.org/uc/item/2mv6d6h6 Wed, 16 Jul 2014 00:00:00 +0000 Oehlberg, Lora Bayley, Cindy Hartman, Cole Agogino, Alice An Environmental and Economic Trade-off Analysis of Manufacturing Process Chains to Inform Decision Making for Sustainability https://escholarship.org/uc/item/26q3w4bc An Environmental and Economic Trade-off Analysis of Manufacturing Process Chains to Inform Decision Making for Sustainability https://escholarship.org/uc/item/26q3w4bc Wed, 16 Jul 2014 00:00:00 +0000 Robinson, Stefanie L. On the Shrinkage and Stiffening of a Cellulose Sponge upon Drying https://escholarship.org/uc/item/12b238cd On the Shrinkage and Stiffening of a Cellulose Sponge upon Drying https://escholarship.org/uc/item/12b238cd Wed, 16 Jul 2014 00:00:00 +0000 Rey, Justine Vandamme, Matthieu Comparing Environmental Impacts of Additive Manufacturing vs. Traditional Machining via Life-Cycle Assessment https://escholarship.org/uc/item/0gv882qk Comparing Environmental Impacts of Additive Manufacturing vs. Traditional Machining via Life-Cycle Assessment https://escholarship.org/uc/item/0gv882qk Wed, 16 Jul 2014 00:00:00 +0000 Faludi, Jeremy Bayley, Cindy Bhogal, Suraj Iribarne, Myles Case-Based Reasoning and Object-Oriented Data Structures Exploit Biological Analogs to Generate Virtual Evolutionary Linkages https://escholarship.org/uc/item/8q94q7hv Case-Based Reasoning and Object-Oriented Data Structures Exploit Biological Analogs to Generate Virtual Evolutionary Linkages https://escholarship.org/uc/item/8q94q7hv Tue, 15 Jul 2014 00:00:00 +0000 Cobb, Corie L. Zhang, Ying Agogino, Alice M. Mangold, Jennifer The engineering design process as a problem solving and learning tool in K-12 classrooms https://escholarship.org/uc/item/8390918m The engineering design process as a problem solving and learning tool in K-12 classrooms https://escholarship.org/uc/item/8390918m Tue, 15 Jul 2014 00:00:00 +0000 Mangold, Jennifer Robinson, Stefanie Manufacturing — Its Evolution and Future https://escholarship.org/uc/item/6mk263q6 Manufacturing — Its Evolution and Future https://escholarship.org/uc/item/6mk263q6 Tue, 15 Jul 2014 00:00:00 +0000 Merchant, Eugene M. Wright, Paul K. Dornfeld, David Precision Manufacturing Process Monitoring with Acoustic Emission https://escholarship.org/uc/item/647722kf Precision Manufacturing Process Monitoring with Acoustic Emission https://escholarship.org/uc/item/647722kf Tue, 15 Jul 2014 00:00:00 +0000 Lee, D. E. Hwang, I. Valente, C. M. O. Oliviera, J. F.G. Dornfeld, D. A. Experimental and numerical investigation of the kinematic theory of unsteady separation https://escholarship.org/uc/item/62f7c813 Experimental and numerical investigation of the kinematic theory of unsteady separation https://escholarship.org/uc/item/62f7c813 Tue, 15 Jul 2014 00:00:00 +0000 Weldon, M. Peacock, T. Jacobs, G. B. Helu, M. Haller, G. Precision and Energy Usage for Additive Manufacturing https://escholarship.org/uc/item/4c11k74w Precision and Energy Usage for Additive Manufacturing https://escholarship.org/uc/item/4c11k74w Tue, 15 Jul 2014 00:00:00 +0000 Clemon, Lee Sudradjat, Anton Jaquez, Maribel Krishna, Aditya Rammah, Marwan Dornfeld, David Research on Subwavelength Microphtonic Sensors for In-situ Monitoring with High Spatial and Temporal Resolution in Manufacturing Environments https://escholarship.org/uc/item/23g8r7g6 Research on Subwavelength Microphtonic Sensors for In-situ Monitoring with High Spatial and Temporal Resolution in Manufacturing Environments https://escholarship.org/uc/item/23g8r7g6 Tue, 15 Jul 2014 00:00:00 +0000 Li, Xiaochun Wong, Chee Wei Dornfeld, David Thomas, Brian A Study of Surface Roughness in the Micro-End-Milling Process https://escholarship.org/uc/item/1bc7g9kj A Study of Surface Roughness in the Micro-End-Milling Process https://escholarship.org/uc/item/1bc7g9kj Tue, 15 Jul 2014 00:00:00 +0000 Lee, Kiha Dornfeld, David A. Strategies for Minimum Energy Operation for Precision Machining https://escholarship.org/uc/item/1821r8f2 Strategies for Minimum Energy Operation for Precision Machining https://escholarship.org/uc/item/1821r8f2 Tue, 15 Jul 2014 00:00:00 +0000 Diaz, Nancy Helu, Moneer Jarvis, Andrew Tonissen, Stefan Dornfeld, David Schlosser, Ralf Assessment of Lean and Green Strategies by Simulation of Manufacturing Systems in Discrete Production Environments https://escholarship.org/uc/item/9w13b4dr Assessment of Lean and Green Strategies by Simulation of Manufacturing Systems in Discrete Production Environments https://escholarship.org/uc/item/9w13b4dr Thu, 10 Jul 2014 00:00:00 +0000 Diaz-Elsayed, Nancy Jondral, Annabel Greinacher, Sebastian Dornfeld, David Lanza, Gisela Dispenser printing for prototyping microscale devices https://escholarship.org/uc/item/9pz403mt Dispenser printing for prototyping microscale devices https://escholarship.org/uc/item/9pz403mt Thu, 10 Jul 2014 00:00:00 +0000 Wright, Paul K. Dornfeld, David A. Chen, Alic Ho, Christine C. Evans, James W. Semi-empirical material removal rate distribution model for SiO<sub>2</sub> chemical mechanical polishing (CMP) processes https://escholarship.org/uc/item/9nr6b6jr Semi-empirical material removal rate distribution model for SiO<sub>2</sub> chemical mechanical polishing (CMP) processes https://escholarship.org/uc/item/9nr6b6jr Thu, 10 Jul 2014 00:00:00 +0000 Lee, H. S. Jeong, H. D. Dornfeld, D. A. Particle-Scale Modeling of CMP https://escholarship.org/uc/item/9hz9d21f Particle-Scale Modeling of CMP https://escholarship.org/uc/item/9hz9d21f Thu, 10 Jul 2014 00:00:00 +0000 Talbot, Jan B. Doyle, Fiona M. Dornfeld, David A. Strategies for Burr Minimization and Cleanability in Aerospace and Automotive Manufacturing https://escholarship.org/uc/item/8s3507d0 Strategies for Burr Minimization and Cleanability in Aerospace and Automotive Manufacturing https://escholarship.org/uc/item/8s3507d0 Thu, 10 Jul 2014 00:00:00 +0000 Ávila, Miguel C. Gardner, Joel D. Reich-Weiser, Corinne Vijayaraghavan, Athulan Dornfeld, David Formulation of the Chip Cleanability Mechanics from fluid transport https://escholarship.org/uc/item/8cp4q3vs Formulation of the Chip Cleanability Mechanics from fluid transport https://escholarship.org/uc/item/8cp4q3vs Thu, 10 Jul 2014 00:00:00 +0000 Garg, Saurabh Dornfeld, David Berger, K. Quantifying the Environmental Footprint of Semiconductor Equipment using the Environmental Value Systems Analysis (EnV-S) https://escholarship.org/uc/item/84c49635 Quantifying the Environmental Footprint of Semiconductor Equipment using the Environmental Value Systems Analysis (EnV-S) https://escholarship.org/uc/item/84c49635 Thu, 10 Jul 2014 00:00:00 +0000 Krishnan, Nikhil Raoux, Sebastién Dornfeld, David A Review of Engineering Research in Sustainable Manufacturing https://escholarship.org/uc/item/8260n3t5 A Review of Engineering Research in Sustainable Manufacturing https://escholarship.org/uc/item/8260n3t5 Thu, 10 Jul 2014 00:00:00 +0000 Haapala, Karl R. Zhao, Fu Camelio, Jaime Sutherland, John W. Skerlos, Steven J. Dornfeld, David A. Jawahir, I. S. Clarens, Andres F. Rickli, Jeremy L. Interoperability Standards for Machine Tool Performance Monitoring https://escholarship.org/uc/item/7xp0m1x5 Interoperability Standards for Machine Tool Performance Monitoring https://escholarship.org/uc/item/7xp0m1x5 Thu, 10 Jul 2014 00:00:00 +0000 Vijayaraghavan, Athulan Dornfeld, David Using a Hybrid Approach to Evaluate Semiconductor Life Cycle Environmental Issues: A Case Study in Interconnect Module Impacts https://escholarship.org/uc/item/7x99h868 Using a Hybrid Approach to Evaluate Semiconductor Life Cycle Environmental Issues: A Case Study in Interconnect Module Impacts https://escholarship.org/uc/item/7x99h868 Thu, 10 Jul 2014 00:00:00 +0000 Krishnan, N. Boyd, S. Rosales, J. Dornfeld, D. Raoux, S. Smati, R. Higher Competitiveness of Speed-Stroke Grinding by Using Increased Wheel Speeds https://escholarship.org/uc/item/7sx9x437 Higher Competitiveness of Speed-Stroke Grinding by Using Increased Wheel Speeds https://escholarship.org/uc/item/7sx9x437 Thu, 10 Jul 2014 00:00:00 +0000 Duscha, M. Linke, B. Klocke, F. Dornfeld, D. Sustainability Indicators for Discrete Manufacturing Processes Applied to Grinding Technology https://escholarship.org/uc/item/7fw982mb Sustainability Indicators for Discrete Manufacturing Processes Applied to Grinding Technology https://escholarship.org/uc/item/7fw982mb Thu, 10 Jul 2014 00:00:00 +0000 Linke, Barbara S. Corman, Gero J. Dornfeld, David A. Tönissen, Stefan Cost and Energy Consumption Optimization of Product Manufacture in a Flexible Manufacturing System https://escholarship.org/uc/item/7dw7w6vc Cost and Energy Consumption Optimization of Product Manufacture in a Flexible Manufacturing System https://escholarship.org/uc/item/7dw7w6vc Thu, 10 Jul 2014 00:00:00 +0000 Diaz, Nancy Dornfeld, David Condition Monitoring in End-Milling Using Wireless Sensor Networks (WSNs) https://escholarship.org/uc/item/7cp1p0ww Condition Monitoring in End-Milling Using Wireless Sensor Networks (WSNs) https://escholarship.org/uc/item/7cp1p0ww Thu, 10 Jul 2014 00:00:00 +0000 Wright, Paul Dornfeld, David Ota, Nathan Acoustic emission based tool contact detection for ultra-precision machining https://escholarship.org/uc/item/7br9q19x Acoustic emission based tool contact detection for ultra-precision machining https://escholarship.org/uc/item/7br9q19x Thu, 10 Jul 2014 00:00:00 +0000 Min, S. Lidde, J. Raue, N. Dornfeld, D. Bicepstrum Based Blind Identification of the Acoustic Emission (AE) Signal in Precision Turning https://escholarship.org/uc/item/77m140sk Bicepstrum Based Blind Identification of the Acoustic Emission (AE) Signal in Precision Turning https://escholarship.org/uc/item/77m140sk Thu, 10 Jul 2014 00:00:00 +0000 Iturrospe, Aitzol Dornfeld, David Atxa, Vicente Abete, José M. Procedural Design of Imprint Rolls for Fluid Pathway Fabrication https://escholarship.org/uc/item/74d0t9cx Procedural Design of Imprint Rolls for Fluid Pathway Fabrication https://escholarship.org/uc/item/74d0t9cx Thu, 10 Jul 2014 00:00:00 +0000 Vijayaraghavan, Athulan Dornfeld, David Linking tool paths generated with different offset distances for edge quality enhancement in planar milling https://escholarship.org/uc/item/72714099 Linking tool paths generated with different offset distances for edge quality enhancement in planar milling https://escholarship.org/uc/item/72714099 Thu, 10 Jul 2014 00:00:00 +0000 Chu, C-H Dornfeld, D Trajectory Generation in High-Speed, High-Precision Micromilling using Subdivision Surfaces https://escholarship.org/uc/item/6m30820n Trajectory Generation in High-Speed, High-Precision Micromilling using Subdivision Surfaces https://escholarship.org/uc/item/6m30820n Thu, 10 Jul 2014 00:00:00 +0000 Vijayaraghavan, Athulan Sodemann, Angela Hoover, Aaron Mayor, Rhett J. Dornfeld, David Semi-empirical Modeling of the Energy Consumed during the Injection Molding Process https://escholarship.org/uc/item/6j39z8nj Semi-empirical Modeling of the Energy Consumed during the Injection Molding Process https://escholarship.org/uc/item/6j39z8nj Thu, 10 Jul 2014 00:00:00 +0000 Chien, Joshua M. Dornfeld, David Towards Energy and Resource Efficient Manufacturing: A Processes and Systems Approach https://escholarship.org/uc/item/6bd3c6bw Towards Energy and Resource Efficient Manufacturing: A Processes and Systems Approach https://escholarship.org/uc/item/6bd3c6bw Thu, 10 Jul 2014 00:00:00 +0000 Duflou, Joost R. Sutherland, John W. Dornfeld, David Herrmann, Christoph Jeswiet, Jack Kara, Sami Hauschild, Michael Kellens, Karel Schematic Characterization of Human Health Impact of Toxic Chemicals for Sustainable Design and Manufacturing https://escholarship.org/uc/item/4nc5051z Schematic Characterization of Human Health Impact of Toxic Chemicals for Sustainable Design and Manufacturing https://escholarship.org/uc/item/4nc5051z Thu, 10 Jul 2014 00:00:00 +0000 Yuan, Chris Y. Dornfeld, David Micromachining for the Precision Fabrication of Microfluidic Devices https://escholarship.org/uc/item/4jn4v4f0 Micromachining for the Precision Fabrication of Microfluidic Devices https://escholarship.org/uc/item/4jn4v4f0 Thu, 10 Jul 2014 00:00:00 +0000 Vijayaraghavan, Athulan Hartnett, Jeffrey Dornfeld, David Prediction of Burr Formation during Face Milling Using an Artificial Neural Network with Optimized Cutting Conditions https://escholarship.org/uc/item/4037n2wd Prediction of Burr Formation during Face Milling Using an Artificial Neural Network with Optimized Cutting Conditions https://escholarship.org/uc/item/4037n2wd Thu, 10 Jul 2014 00:00:00 +0000 Lee, S H Dornfeld, D A Challenges in modeling machining in multilayer materials https://escholarship.org/uc/item/3tb38390 Challenges in modeling machining in multilayer materials https://escholarship.org/uc/item/3tb38390 Thu, 10 Jul 2014 00:00:00 +0000 Vijayaraghavan, Athulan Dornfeld, David A. Software support for environmentally benign mold making process and operations https://escholarship.org/uc/item/3r59k11j Software support for environmentally benign mold making process and operations https://escholarship.org/uc/item/3r59k11j Thu, 10 Jul 2014 00:00:00 +0000 Kong, Daeyoung Choi, Seungchoun Dornfeld, David Modification of surface properties on a nitride based coating films through mirror-quality finish grinding https://escholarship.org/uc/item/3781q4c6 Modification of surface properties on a nitride based coating films through mirror-quality finish grinding https://escholarship.org/uc/item/3781q4c6 Thu, 10 Jul 2014 00:00:00 +0000 Katahira, K. Ohmori, H. Komotori, J. Dornfeld, D. Kotani, H. Mizutani, M. Life-Cycle Energy Demand of Computational Logic: From High-Performance 32nm CPU to Ultra-Low-Power 130nm MCU https://escholarship.org/uc/item/2d47b7dg Life-Cycle Energy Demand of Computational Logic: From High-Performance 32nm CPU to Ultra-Low-Power 130nm MCU https://escholarship.org/uc/item/2d47b7dg Thu, 10 Jul 2014 00:00:00 +0000 Bol, David Boyd, Sarah Dornfeld, David A Three Dimensional System Approach for Environmentally Sustainable Manufacturing https://escholarship.org/uc/item/262749ph A Three Dimensional System Approach for Environmentally Sustainable Manufacturing https://escholarship.org/uc/item/262749ph Thu, 10 Jul 2014 00:00:00 +0000 Yuan, Chris Zhai, Qiang Dornfield, David Effects of ELID-Electrolytic Coolant with Nanometer Size Carbon Particles on the Cutting Phenomena https://escholarship.org/uc/item/24b6n91g Effects of ELID-Electrolytic Coolant with Nanometer Size Carbon Particles on the Cutting Phenomena https://escholarship.org/uc/item/24b6n91g Thu, 10 Jul 2014 00:00:00 +0000 Inada, Akihiro Ohmori, Hitoshi Min, Sangkee Dornfeld, David On impinging near-field granular jets https://escholarship.org/uc/item/1tw1t8k0 On impinging near-field granular jets https://escholarship.org/uc/item/1tw1t8k0 Thu, 10 Jul 2014 00:00:00 +0000 Arbelaez, D. Zohdi, T. I. Dornfeld, D. A. Leveraging Manufacturing for a Sustainable Future https://escholarship.org/uc/item/1cc027n6 Leveraging Manufacturing for a Sustainable Future https://escholarship.org/uc/item/1cc027n6 Thu, 10 Jul 2014 00:00:00 +0000 Dornfeld, David Burrs-Analysis, control and removal https://escholarship.org/uc/item/0zz4s5qb Burrs-Analysis, control and removal https://escholarship.org/uc/item/0zz4s5qb Thu, 10 Jul 2014 00:00:00 +0000 Aurich, J. C. Dornfeld, D. Arrazola, P. J. Franke, V. Leitz, L. Min, S. Development of a CMP Pad with Controlled Micro Features for Improved Performance https://escholarship.org/uc/item/0sc1x8mq Development of a CMP Pad with Controlled Micro Features for Improved Performance https://escholarship.org/uc/item/0sc1x8mq Thu, 10 Jul 2014 00:00:00 +0000 Lee, Sunghoon Kim, Hyoungjae Dornfeld, David "Technology Wedges" for Implementing Green Manufacturing https://escholarship.org/uc/item/0mh97659 "Technology Wedges" for Implementing Green Manufacturing https://escholarship.org/uc/item/0mh97659 Thu, 10 Jul 2014 00:00:00 +0000 Dornfeld, David Wright, Paul Geometric Approaches for Reducing Burr Formation in Planar Milling by Avoiding Tool Exits https://escholarship.org/uc/item/0gn3q1vb Geometric Approaches for Reducing Burr Formation in Planar Milling by Avoiding Tool Exits https://escholarship.org/uc/item/0gn3q1vb Thu, 10 Jul 2014 00:00:00 +0000 Dornfeld, David Chu, Chih-Hsing Greening PCB Drilling Process: Burr Minimization and Other Strategies https://escholarship.org/uc/item/09n736bv Greening PCB Drilling Process: Burr Minimization and Other Strategies https://escholarship.org/uc/item/09n736bv Thu, 10 Jul 2014 00:00:00 +0000 Huang, Yu-Chu Linke, Barbara Bhandari, Binayak Ahn, Sung-Hoon Dornfeld, David Development of a micro-drilling burr-control chart for PCB drilling https://escholarship.org/uc/item/08k854nq Development of a micro-drilling burr-control chart for PCB drilling https://escholarship.org/uc/item/08k854nq Thu, 10 Jul 2014 00:00:00 +0000 Bhandari, Binayak Hong, Young-Sun Yoon, Hae-Sung Moon, Jong-Seol Pham, Minh-Quan Lee, Gyu-Bong Huang, Yuchu Linke, Barbara S. Dornfeld, D. A. Ahn, Sung-Hoon Metrics for Sustainable Manufacturing https://escholarship.org/uc/item/06r4m8j8 Metrics for Sustainable Manufacturing https://escholarship.org/uc/item/06r4m8j8 Thu, 10 Jul 2014 00:00:00 +0000 Reich-Weiser, Corinne Vijayaraghavan, Athulan Dornfeld, David A. Modeling Gaps and Overlaps of Sustainability Standards https://escholarship.org/uc/item/0649879n Modeling Gaps and Overlaps of Sustainability Standards https://escholarship.org/uc/item/0649879n Thu, 10 Jul 2014 00:00:00 +0000 D'Alessio, Anna E. Witherell, Paul Rachuri, Sudarsan Improving endmilling surface finish by workpiece rotation and adaptive toolpath spacing https://escholarship.org/uc/item/25p8s2qb Improving endmilling surface finish by workpiece rotation and adaptive toolpath spacing https://escholarship.org/uc/item/25p8s2qb Wed, 2 Jul 2014 00:00:00 +0000 Vijayaraghavan, Athulan Hoover, Aaron M. Dornfeld, David A. Hartnett, Jeffrey Evaluating Trade-Offs Between Sustainability, Performance, and Cost of Green Machining Technologies https://escholarship.org/uc/item/85m7t36t The growing demand to reduce environmental impacts has encouraged manufacturers to pursue various green manufacturing technologies and strategies. These solutions, though, may have a direct impact on several productivity metrics including availability, quality, service life, and cost. This study presents an approach to evaluate the trade-offs between the environmental, performance, and financial impacts of green machining technologies by combining green manufacturing principles into life cycle performance evaluation. The approach is validated by investigating the implications of reducing the processing time by increasing the cutting speed and chip load to green a horizontal milling process. https://escholarship.org/uc/item/85m7t36t Thu, 22 Mar 2012 00:00:00 +0000 Helu, Moneer Rühl, Jan Dornfeld, David Werner, Patrick Lanza, Gisela Evaluating trade-offs between sustainability, performance, and cost of green machining technologies https://escholarship.org/uc/item/4z9616zq The growing demand to reduce environmental impacts has encouraged manufacturers to pursue various green manufacturingtechnologies and strategies. These solutions, though, may have a direct impact on several productivity metricsincluding availability, quality, service life, and cost. This study presents an approach to evaluate the trade-offs betweenthe environmental, performance, and financial impacts of green machining technologies by combining green manufacturingprinciples into life cycle performance evaluation. The approach is validated by investigating the implications of reducingthe processing time by increasing the cutting speed and chip load to green a horizontal milling process. https://escholarship.org/uc/item/4z9616zq Thu, 22 Mar 2012 00:00:00 +0000 Helu, Moneer Evaluating the relationship between use phase environmental impacts and manufacturing process precision https://escholarship.org/uc/item/2s22h3pp The environmental impact of most consumer products is dominated by their use phase. However, theseimpacts tend to be driven by the manufacture of the product’s components since components fabricatedwith higher precision typically allow the product to operate at higher efficiencies. This paper investigatesthe relationship between precision and life cycle environmental impacts by extending the traditional LCAmethodology to evaluate the impact of manufacturing process precision on the functional performance ofa product during its use phase. The implications of this relationship to manufacturing decision-makingare also discussed as sustainability concerns may support the use of higher precision processes.deee https://escholarship.org/uc/item/2s22h3pp Thu, 22 Mar 2012 00:00:00 +0000 Helu, Moneer Vijayaraghavan, Athulan Dornfeld, David Evaluating the relationship between use phase environmental impacts and manufacturing process precision https://escholarship.org/uc/item/1q13x07z The environmental impact of most consumer products is dominated by their use phase. However, these impacts tend to be driven by the manufacture of the product’s components since components fabricated with higher precision typically allow the product to operate at higher efficiencies. This paper investigates the relationship between precision and life cycle environmental impacts by extending the traditional LCA methodology to evaluate the impact of manufacturing process precision on the functional performance of a product during its use phase. The implications of this relationship to manufacturing decision-making are also discussed as sustainability concerns may support the use of higher precision processes. https://escholarship.org/uc/item/1q13x07z Thu, 22 Mar 2012 00:00:00 +0000 Helu, Moneer Vijayaraghavan, Athulan Dornfeld, David Sustainable Manufacturing – Greening Processes, Systems and Products https://escholarship.org/uc/item/80x443hk <p>Implementing green manufacturing, as the first step towards sustainable production, has been growing in interest and importance over the last few years. The opportunities for developing advanced manufacturing capabilities while, at the same time, reducing the impact of manufacturing on energy use, water and resource consumption and, overall, green house gas emissions and carbon footprint are numerous. This paper reviews the background, vocabulary and motivation for green manufacturing and highlights the competitive opportunities for manufacturers who embrace, seriously, this growing movement. The terms "green" and "sustainable" are defined in a manufacturing context, metrics and tools for assessing manufacturing are described, and some concrete examples of how to begin and what are others doing are given. Some of the future directions of green manufacturing are discussed.</p> https://escholarship.org/uc/item/80x443hk Mon, 10 Oct 2011 00:00:00 +0000 Dornfeld, David LIFE CYCLE MANAGEMENT OF ABRASIVE TOOLS AND EFFECTS ON SUSTAINABLE GRINDING https://escholarship.org/uc/item/5th4d3q7 <p>The world-wide trend to environmental awareness is accompanied by a rising need for manufacturing technologies that spare energy and resources. The sustainability of products and processes becomes more and more a main competitive edge. However, the very essential aspect of abrasive tool design and its impact on process eco-efficiency have not been examined in a holistic view yet. Therefore this work evaluates the whole tool life from manufacturing to use phase and end-of-life.</p><p>Abrasive tools have a huge variety in specifications, manufacturing steps and ingredients Therefore a framework has to be set up to evaluate tool manufacturing with a thorough investigation of main and auxiliary ingredients emissions waste and energy Tool design affects the abrasive machining process in terms of productivity workpiece quality and tool life. Relevant mechanisms of impact are discussed, evaluated and included into a suitable holistic life cycle management of abrasive tools. Not only... https://escholarship.org/uc/item/5th4d3q7 Mon, 10 Oct 2011 00:00:00 +0000 Linke, Barbara Combination of Speed Stroke Grinding and High Speed Grinding with Regard to Sustainability https://escholarship.org/uc/item/5qs5k8pv <p>Production engineering is under constant pressure to satisfy demands for improved productivity while simultaneously achieving high workpiece quality. In addition, environmental awareness is a growing concern to address. New technologies represent new opportunities for increased productivity. This paper shows how the combination of speed stroke grinding and high speed machining can boost both process performance and workpiece quality. Theoretical consideration is validated by experiments and analyzed regarding energetic and environmental aspects. Only a thorough choice of process parameters leads to high process sustainability. Furthermore, lower tensile stresses can positively leverage increased manufacturing effort to optimize the overall product life cycle.</p> https://escholarship.org/uc/item/5qs5k8pv Mon, 10 Oct 2011 00:00:00 +0000 Linke, Barbara M. Duscha F. Klocke Dornfeld, David Energy Consumption Characterization and Reduction Strategies for Milling Machine Tool Use https://escholarship.org/uc/item/40g995w6 <p>Since machine tools are used extensively throughout their functional life and consequently consuming valuable natural resources and emitting harmful pollutants during this time, this study reviews strategies for characterizing and reducing the energy consumption of milling machine tools during their use. The power demanded by a micromachining center while cutting low carbon steel under varied material removal rates was measured to model the specific energy of the machine tool. Thereafter the power demanded was studied for cutting aluminum and polycarbonate work pieces for the purpose of comparing the difference in cutting power demand relative to that of steel.</p> https://escholarship.org/uc/item/40g995w6 Mon, 10 Oct 2011 00:00:00 +0000 Diaz, Nancy E. Redelsheimer Dornfeld, David Software-based tool path evaluation for environmental sustainability https://escholarship.org/uc/item/1387x8h9 <p>Currently available life cycle assessment (LCA) tools provide only a rough estimation of the environmental impact of different manufacturing operations (e.g. energy consumption). To address this limitation, a web-based and application programming interface (API) based process analysis software tools were developed to estimate the energy consumption of a computer numerically controlled (CNC) machine tool operation and to evaluate its environmental impact as a first step towards sustainable manufacturing analysis. Acceleration/deceleration of machine tool axes and the direction of axes movement were considered to estimate the total energy demand and processing time of the machine tool operation. Several tool path generation schemes were tested to analyze the energy consumption and resulting green house gas emission of CNC machine tool operation. It showed that tool path generation schemes affect the amount of energy and the processing time required to machine the same part, and... https://escholarship.org/uc/item/1387x8h9 Mon, 10 Oct 2011 00:00:00 +0000 KONG, DAEYOUNG Seungchoun Choi Yusuke Yasui Sushrut Pavanaskar Dornfeld, David Wright, Paul Integrating Green and Sustainability Aspects into Life Cycle Performance Evaluation https://escholarship.org/uc/item/825308wk <p>Recently, an increasing number of customers of the machine tool industry have applied life cycle costing (LCC) to compare the cost-effectiveness of different investment options. These concepts have mainly been used to address maintenance costs since these have proven to be one of the most important cost drivers. The approach of life cycle performance (LCP) broadens LCC by considering the relationship between the costs and benefits of a machine over its entire life cycle. With the increasing importance of environmental consciousness, it has become crucial to incorporate environmental impact when evaluating machines. A framework is presented that enables the integration of green manufacturing principles into LCP-evaluation. The role of interoperability within this framework is also discussed.</p> https://escholarship.org/uc/item/825308wk Thu, 20 Jan 2011 00:00:00 +0000 Niggeschmidt, Stephan Helu, Moneer Diaz, Nancy Behmann, Benjamin Lanza, Gisela Dornfeld, David Machine Tool Design and Operation Strategies for Green Manufacturing https://escholarship.org/uc/item/5gz7j6rn <p>Strategies to reduce energy demand in manufacturing processes are becoming necessary due to the growing concern of carbon emissions and the expected rise of electricity prices over time. To guide the development of these strategies, the results of a life-cycle energy consumption analysis of milling machine tools are first highlighted to show the effect of several factors such as degree of automation, manufacturing environment, transportation, material inputs, and facility inputs on environmental impact. An overview of design and operation strategies to reduce energy consumption is thereafter presented including the implementation of a Kinetic Energy Recovery System (KERS), a process parameter selection strategy, and a web-based energy estimation tool.</p> https://escholarship.org/uc/item/5gz7j6rn Thu, 20 Jan 2011 00:00:00 +0000 Diaz, Nancy Choi, Seungchoun Helu, Moneer Chen, Yifen Jayanathan, Stephen Yasui, Yusuke Kong, Daeyoung Pavanaskar, Sushrut Dornfeld, David Enabling Manufacturing Research through Interoperability https://escholarship.org/uc/item/21m926m4 <p>Interoperability standards, which provide standardized communication and information exchange between machine tools and components, are necessary to bring together the many advances of the manufacturing community and fully address the challenges facing industry. Such a comprehensive approach is necessary due to the growing complexity in manufacturing and the shrinking time scale of manufacturing decision-making. In this paper we discuss the benefits of interoperability in different aspects of manufacturing research including process monitoring, CAD/CAM/CAPP, and flexible and reconfigurable manufacturing systems, as well as the advantages of interoperable systems in fulfilling the growth of sustainability and environmental requirements in manufacturing.</p> https://escholarship.org/uc/item/21m926m4 Thu, 20 Jan 2011 00:00:00 +0000 Dornfeld, David Wright, Paul Helu, Moneer Vijayaraghavan, Athulan Strategies to reduce energy demand in manufacturing processes are becoming necessary due to the growing concern of carbon emissions and the expected rise of electricity prices over time. To guide the development of these strategies, the results of a life-cycle energy consumption analysis of milling machine tools are first highlighted to show the effect of several factors such as degree of automation, manufacturing environment, transportation, material inputs, and facility inputs on environmental impact. An overview of design and operation strategies to reduce energy consumption is thereafter presented including the implementation of a Kinetic Energy Recovery System (KERS), a process parameter selection strategy, and a web-based energy estimation tool. https://escholarship.org/uc/item/1k95m67q <p>Environmental issues in manufacturing are receiving increasing attention as part of the global concerns about environmental impacts and energy efficiency. This paper outlines a strategy using the “technology wedge” concept to address the improvement of manufacturing processes towards the goal of green manufacturing. After defining the nature of the wedges and how to assess their impact, an example of a potential wedge technology is reviewed. The wedge concept can be useful in assessing directions for new process developments in manufacturing as well as improving existing processes.</p> https://escholarship.org/uc/item/1k95m67q Thu, 20 Jan 2011 00:00:00 +0000 Dornfeld, David Wright, Paul Environmental Challenges for 45-nm and 32-nm node CMOS Logic https://escholarship.org/uc/item/81h91626 <p>The objective of this work is to understand the materials and energy requirements, and emissions associated with new semiconductor manufacturing technology nodes. Current and near-future CMOS technologies (for the 45-nm and 32-nm nodes) are investigated using an inventory based on bottom-up process data. The process flow of the CMOS chip is modeled by updating an existing inventory analysis (for 130 nm node devices) to include strained Si channels, metal gates, 10 layers of interconnect and high-k gate dielectrics used in 45-nm and 32-nm CMOS nodes. Conclusions are made concerning emissions of new materials and trends in life cycle energy consumption of logic devices.</p> https://escholarship.org/uc/item/81h91626 Wed, 19 Jan 2011 00:00:00 +0000 Boyd, Sarah Dornfeld, David Krishnan, Nikhil Mehran Moalem A Hybrid Life Cycle Inventory of Nano-Scale Semiconductor Manufacturing https://escholarship.org/uc/item/7931209f <p>The manufacturing of modern semiconductor devices involves a complex set of nanoscale fabrication processes that are energy and resource intensive, and generate significant waste. It is important to understand and reduce the environmental impacts of semiconductor manufacturing because these devices are ubiquitous components in electronics. Furthermore, the fabrication processes used in the semiconductor industry are finding increasing application in other products, such as microelectromechanical systems (MEMS), flat panel displays, and photovoltaics. In this work we develop a library of typical gate-to-gate materials and energy requirements, as well as emissions associated with a complete set of fabrication processmodelsusedinmanufacturingamodernmicroprocessor. In addition, we evaluate upstream energy requirements associated with chemicals and materials using both existing process life cycle assessment (LCA) databases and an economic input-output (EIO) model. The result is... https://escholarship.org/uc/item/7931209f Wed, 19 Jan 2011 00:00:00 +0000 Krishnan, Nikhil Boyd, Sarah Somani, Ajay Dornfeld, David Automated energy monitoring of machine tools https://escholarship.org/uc/item/3j5411bd <p>Reducing the energy consumption of machine tools can significantly improve the environmental performance of manufacturing systems. To achieve this, monitoring of energy consumption patterns in the systems is required. It is vital in these studies to correlate energy usage with the operations being performed in the manufacturing system. However, this can be challenging due to complexity of manufacturing systems and the vast number of data sources. Event stream processing techniques are applied to automate the monitoring and analysis of energy consumption in manufacturing systems. Methods to reduce usage based on the specific patterns discerned are discussed.</p> https://escholarship.org/uc/item/3j5411bd Wed, 19 Jan 2011 00:00:00 +0000 Vijayaraghavan, Athulan Dornfeld, David Life-cycle assessment of NAND flash memory https://escholarship.org/uc/item/2wr9b3t1 <p>Solid state drives (SSDs) show potential for environmental benefits over magnetic data storage due to their lower power consumption. To investigate this possibility, a life-cycle assessment (LCA) of NAND flash over five technology generations (150 nm, 120 nm, 90 nm, 65 nm, and 45 nm) is presented to quantify environmental impacts occurring in flash production and to investigate their trends over time. The inventory of resources and emissions in flash manufacturing, electricity generation and some chemicals are based on process data, while that of fab infrastructure, water and the remaining chemicals are determined using economic input-output life-cycle analysis (EIO-LCA) or hybrid LCA. Over the past decade, impacts have fallen in all impact categories per GB. Sensitivity analysis shows that the most influential factors over the life-cycle global warming potential (GWP) of flash memory are abatement of perfluorinated compounds (PFCs) and reduction of electricity-related emissions... https://escholarship.org/uc/item/2wr9b3t1 Wed, 19 Jan 2011 00:00:00 +0000 Boyd, Sarah Horvath, A Dornfeld, David Life Cycle Inventory of a CMOS Chip https://escholarship.org/uc/item/20d8v6kt <p>A life cycle inventory for comparative assessment of assorted semiconductor device types is assembled using a library of process step-related information. In this paper, we present the structure of this library of energy use, material inputs and emissions data at the process equipment-level and facilities-scale, normalized per wafer. Selected results from a case study of a 130nm node CMOS device are presented and compared with a previous study of a comparable chip. Comparative production impacts of 6-layer and 8-layer CMOS devices are shown.</p> https://escholarship.org/uc/item/20d8v6kt Wed, 19 Jan 2011 00:00:00 +0000 Boyd, Sarah Dornfeld, David Krishnan, Nikhil A Cradle to Grave Framework for Environmental Assessment of Photovoltaic Systems https://escholarship.org/uc/item/1v87j5f9 <p>Environmental assessment of photovoltaic systems is a rich field, with representations of many technologies, regions and methodologies. This paper discusses some of the factors that strongly affect the outcomes of studies, encourages detailed reporting of normalization parameters and scope, and discusses a cradle to grave framework for benchmarking life cycle assessments of photovoltaic systems.</p> https://escholarship.org/uc/item/1v87j5f9 Wed, 19 Jan 2011 00:00:00 +0000 Zhang, Teresa Dornfeld, David A Schematic Method for Sustainable Material Selection of Toxic Chemicals in Design and Manufacturing https://escholarship.org/uc/item/9p62v05m <p>Toxic chemicals used in product design and manufacturing are grave concerns due to their toxic impact on human health. Implementing sustainable material selection strategies on toxic chemicals can substantially improve the sustainability of products in both design and manufacturing processes. In this paper, a schematic method is presented for characterizing and benchmarking the human health impact of toxic chemicals, as a visual aid to facilitate decision-making in the material selection process for sustainable design and manufacturing. In this schematic method, the human health impact of a toxic chemical is characterized by two critical parameters: daily exposure risk R and environmental persistence T. The human health impact of a toxic chemical is represented by its position in the R−T two-dimensional plot, which enables the screening and benchmarking of toxic chemicals to be easily made through comparing their relative positions in the characterization plot. A case study... https://escholarship.org/uc/item/9p62v05m Wed, 1 Dec 2010 00:00:00 +0000 Yuan, Chris Yingchun David Dornfeld Integrated Sustainability Analysis of Atomic Layer Deposition for Microelectronics Manufacturing https://escholarship.org/uc/item/4w89d0m2 <p>Atomic layer deposition (ALD) is a promising nanotechnology for wide applications in microelectronics manufacturing due to its ability to control layer growth at atomic scale. Sustainability of ALD technology needs to be quantitatively investigated in this early development stage to improve its economic and environmental performance. In this paper, we present an integrated sustainability analysis of ALD technology through material and energy flow analyses. The study is performed on the ALD of Al2O3 high- dielectric film through trimethylaluminum and water binary reactions. The precursor utilizations, methane emissions, and nanowaste generations from the ALD process are all quantitatively studied. Energy flow analysis demonstrates that the ALD process energy consumption is mainly determined by the ALD cycle time rather than the process temperature. Scale-up performance of the ALD technology is also studied for both emission generations and energy consumptions. Strategies and... https://escholarship.org/uc/item/4w89d0m2 Wed, 1 Dec 2010 00:00:00 +0000 Yuan, Chris Yingchun David Dornfeld Environmental Analysis of Milling Machine Tool Use in Various Manufacturing Environments https://escholarship.org/uc/item/9ct6f6d2 <p>A life-cycle energy consumption analysis of a Bridgeport manual mill and a Mori Seiki DuraVertical 5060 has been conducted. The use phase incorporated three manufacturing environments: a community shop, a job shop, and a commercial facility. The CO2-equivalent emissions were presented per machined part. While the use phase comprised the majority of the overall emissions, the manufacturing phase emissions were significant especially for the job shop, which is not as efficient as the other facilities due to its inherent need for flexibility. Since the Mori Seiki is heavier, the manufacturing phase of this machine tool had a greater impact on emissions than the Bridgeport. Transportation was small relative to the use phase, which was dominated by cutting, HVAC, and lighting. These results highlight areas for energy reductions in machine tool design as well as the importance of facility type to the manufacture of any product.</p> https://escholarship.org/uc/item/9ct6f6d2 Fri, 24 Sep 2010 00:00:00 +0000 Diaz, Nancy Helu, Moneer Jayanathan, Stephen Chen, Yifen Horvath, Arpad Dornfeld, David Strategies for Minimum Energy Operation for Precision Machining https://escholarship.org/uc/item/794866g5 <p>The development of "green" machine tools will require novel approaches for design, production and operation for energy savings and reduced environmental impact. We describe here work on three projects: i. influence of process parameters on power consumption of end-milling using force and process time models with experimental verification. Process parameters are chosen to minimize process time since power consumed by a machine tool is essentially independent of the load and energy per unit manufactured decreases with process time; ii. KERS (kinetic energy recovery system) for machine design and modeling the integration of a recovery system into a machine tool to calculate the amount of energy that could be recovered, and whether the environmental benefits are significant; and iii. evaluation of interoperability solutions, such as MTConnect, as tools enabling a standardized "plug-and-play" platform to integrate sensors with a unified monitoring scheme to achieve improved energy... https://escholarship.org/uc/item/794866g5 Fri, 24 Sep 2010 00:00:00 +0000 Diaz, Nancy Helu, Moneer Jarvis, Andrew Tönissen, Stefan Dornfeld, David Schlosser, Ralf Design and Operation Strategies for Green Machine Tool Development https://escholarship.org/uc/item/613797g5 <p>Several strategies in the areas of process planning, machine design, and machine operation exist to develop green machine tools. Before exploring different solutions, a life-cycle energy analysis is first presented to guide subsequent investigation. The results of this analysis provide a range of the environmental impact of the use of machine tools in different types of manufacturing facilities. One strategy explored energy consumption reduction by process parameter selection. The specific energy of the NV1500 DCG was characterized to estimate the environmental burden of the manufacture of a standard part under various cutting conditions. Finally, we present a software solution to implement green machining strategies to aid process planning. This software is a “dashboard” program that estimates environmental impact for a given NC program.</p> https://escholarship.org/uc/item/613797g5 Fri, 24 Sep 2010 00:00:00 +0000 Diaz, Nancy Helu, Moneer Dornfeld, David Appropriate use of Green Manufacturing Frameworks https://escholarship.org/uc/item/10w7h9rb <p>Multiple frameworks have been developed for sustainable or green manufacturing systems and products, which can be roughly divided into life cycle assessment methodologies and life-cycle assessment standards. Methodologies include process LCA, input-output LCA, and hybrid LCA; standards include the ISO14044 standard, the US EPA Life-Cycle Engineering Standard, and various emerging greenhouse gas protocols. We discuss in this paper the differences between these frameworks, and define the specific use cases where each framework is best suited. We achieve this by looking at manufacturing systems and processes across spatial and temporal levels of complexity and assess the suitability of existing frameworks at each level. The main questions addressed are: (1) what are appropriate LCA methodologies for different scales of manufacturing? (2) how do existing standards apply across various levels of manufacturing?</p> https://escholarship.org/uc/item/10w7h9rb Mon, 31 May 2010 00:00:00 +0000 Reich-Weiser, Corinne Vijayaraghavan, Athulan Dornfeld, David Life-cycle assessment of computational logic produced from 1995 through 2010 https://escholarship.org/uc/item/6m34r4ch <p>Determination of the life-cycle environmental and human health impacts of semiconductor logic is essential to a better understanding of the role information technology can play in achieving energy efficiency or global warming potential reduction goals.This study provides a life-cycle assessment for digital logic chips over seven technology generations, spanning from 1995 through 2010. Environmental indicators include global warming potential, acidification, eutrophication, ground level ozone (smog) formation, potential human cancer and non-cancer health effects, ecotoxicity and water use. While impacts per device area related to fabrication infrastructure and use-phase electricity have increased steadily, those due to transportation and fabrication direct emissions have fallen as a result of changes in process technology, device and wafer sizes and yields over the generations. Electricity, particularly in the use phase, and direct emissions from fabrication are the most important... https://escholarship.org/uc/item/6m34r4ch Wed, 24 Feb 2010 00:00:00 +0000 Boyd, Sarah A. Horvath Dornfeld, David