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Articles 1 - 30 of 38
Full-Text Articles in Engineering
Innovative Schematic Concept Analysis For A Space Suit Portable Life Support Subsystem, M. Schuller, R. Kobrick, T. Lalk, L. Wiseman, F. Little, Et Al.
Innovative Schematic Concept Analysis For A Space Suit Portable Life Support Subsystem, M. Schuller, R. Kobrick, T. Lalk, L. Wiseman, F. Little, Et Al.
Ryan L. Kobrick
Conceptual designs for a space suit Personal Life Support Subsystem (PLSS) were developed and assessed to determine if upgrading the system using new, emerging, or projected technologies to fulfill basic functions would result in mass, volume, or performance improvements. Technologies were identified to satisfy each of the functions of the PLSS in three environments (zero-g, Lunar, and Martian) and in three time frames (2006, 2010, and 2020). The viability of candidate technologies was evaluated using evaluation criteria such as safety, technology readiness, and reliability. System concepts (schematics) were developed for combinations of time frame and environment by assigning specific technologies …
Space Suit Concepts And Vehicle Interfaces For The Constellation Program, D. M. Klaus, J. Metts, R. Kobrick, M. Mesloh, T. Monk, Et Al.
Space Suit Concepts And Vehicle Interfaces For The Constellation Program, D. M. Klaus, J. Metts, R. Kobrick, M. Mesloh, T. Monk, Et Al.
Ryan L. Kobrick
In carrying out NASA’s Vision for Space Exploration, a number of different environments will be encountered that will require the crew to wear a protective space suit. Specifically, four suited mission phases are identified as Launch, Entry & Abort profiles, Contingency 0g (orbital) Extravehicular Activity (EVA), Lunar Surface EVA and Martian Surface EVA. This study presents conceptual design solutions based on a previous architecture assessment that defined space suit operational requirements for four proposed space suit configuration options. In addition, a subset of vehicle interface requirements are defined for enabling umbilical and physical connections between the suits and the various …
Developing Abrasion Test Standards For Evaluating Lunar Construction Materials, Ryan L. Kobrick, David M. Klaus, Kenneth W. Street
Developing Abrasion Test Standards For Evaluating Lunar Construction Materials, Ryan L. Kobrick, David M. Klaus, Kenneth W. Street
Ryan L. Kobrick
Operational issues encountered by Apollo astronauts relating to lunar dust were catalogued, including material abrasion that resulted in scratches and wear on spacesuit components, ultimately impacting visibility, joint mobility and pressure retention. Standard methods are being developed to measure abrasive wear on candidate construction materials to be used for spacesuits, spacecraft, and robotics. Calibration tests were conducted using a standard diamond stylus scratch tip on the common spacecraft structure aluminum, Al 6061-T6. Custom tips were fabricated from terrestrial counterparts of lunar minerals for scratching Al 6061-T6 and comparing to standard diamond scratches. Considerations are offered for how to apply standards …
Hispanic Maternal And Children's Perceptions Of Neighborhood Safety Related To Walking And Cycling, Norma Olvera, Dennis W. Smith, Chanam Lee, Jian Liu, Jay Lee, Stephanie Kellam, Jun-Hyun Kim
Hispanic Maternal And Children's Perceptions Of Neighborhood Safety Related To Walking And Cycling, Norma Olvera, Dennis W. Smith, Chanam Lee, Jian Liu, Jay Lee, Stephanie Kellam, Jun-Hyun Kim
Jian Liu
This study examined neighborhood safety as perceived by children (mean age=10 years) and their mothers, and its association with children's physical activity. For all eight safety items examined, children perceived their environment as less dangerous than mothers (p<0.05). None of the multiple regression models predicting children's physical activity by safety perceptions were significant (p>0.10). The maternal perception model explained the highest percentage of variance (R2=0.26), compared to the children's perception model (R2=0.22). Findings suggest that future studies should explore relations between self-reported and objectively measured safety barriers to Hispanic youth walking and cycling.
Modelling And Hazard Analysis For Contaminated Sediments Using Stamp Model And Stpa Tool, Karim Hardy, Franck Guarnieri
Modelling And Hazard Analysis For Contaminated Sediments Using Stamp Model And Stpa Tool, Karim Hardy, Franck Guarnieri
Karim Hardy
The goal of this article is dual: first, introducing a new model of accident named STAMP (systems-theoretic accident modeling and processes); then applying the model to an innovative process for the treatment of contaminated substances and the re-use of treated substances. This article is a demonstration for a need of a new tool to take into account hazards and safety within socio-technical systems.
Keynote: Justifying Uberveillance- The Internet Of Things And The Flawed Sustainability Premise, Katina Michael
Keynote: Justifying Uberveillance- The Internet Of Things And The Flawed Sustainability Premise, Katina Michael
Professor Katina Michael
Imagine a world where everything was numbered. Not just homes with street addresses, or cars with number plates, or smart phones with telephone numbers, or email addresses with passwords, but absolutely everything you could see and touch and even that which you could not. Well, that world is here, right now. This vast expanse we call “Earth” is currently being quantified and photographed, inch by inch, by satellites, street cameras, drones and high altitude balloons. Longitude and latitude coordinates provide us with the precise degrees, minutes and seconds of the physical space, and unique time stamps tell us where a …
Isolating Corrosion Of Steel Plates Coupled With Titanium, Anil Patnaik, X. Shan, M. Adams, T. Srivatsan, Craig Menzemer, Joe Payer
Isolating Corrosion Of Steel Plates Coupled With Titanium, Anil Patnaik, X. Shan, M. Adams, T. Srivatsan, Craig Menzemer, Joe Payer
Craig Menzemer
Over twenty six percent of the bridges in the United States are structurally deficient or functionally obsolete. Corrosion of steel used in structures like bridges and buildings is a problem that has gained increased interest and focused concern. Steel is often the metal that is preferred for use in such applications due to a synergism of ease of availability, acceptable mechanical properties and cost effectiveness. Through the years, titanium has grown in strength, stature and significance to be recognized as an emerging high performance metal that is both stronger and lighter than steel. A distinctive property of titanium and its …
A Review On The Occurrence Of Micropollutants In The Aquatic Environment And Their Fate And Removal During Wastewater Treatment, Yunlong Luo, Wenshan Guo, Huu Hao Ngo, Long Duc Nghiem, Faisal Ibney Hai, Jian Zhang, Shuang Liang, Xiaochang C. Wang
A Review On The Occurrence Of Micropollutants In The Aquatic Environment And Their Fate And Removal During Wastewater Treatment, Yunlong Luo, Wenshan Guo, Huu Hao Ngo, Long Duc Nghiem, Faisal Ibney Hai, Jian Zhang, Shuang Liang, Xiaochang C. Wang
Faisal I Hai
Micropollutants are emerging as a new challenge to the scientific community. This review provides a summary of the recent occurrence of micropollutants in the aquatic environment including sewage, surface water, groundwater and drinking water. The discharge of treated effluent from WWTPs is a major pathway for the introduction of micropollutants to surface water. WWTPs act as primary barriers against the spread of micropollutants. WWTP removal efficiency of the selected micropollutants in 14 countries/regions depicts compound-specific variation in removal, ranging from 12.5 to 100%. Advanced treatment processes, such as activated carbon adsorption, advanced oxidation processes, nanofiltration, reverse osmosis, and membrane bioreactors …
Isolating Corrosion Of Steel Plates Coupled With Titanium, Anil Patnaik, X. Shan, M. Adams, T. Srivatsan, Craig Menzemer, Joe Payer
Isolating Corrosion Of Steel Plates Coupled With Titanium, Anil Patnaik, X. Shan, M. Adams, T. Srivatsan, Craig Menzemer, Joe Payer
Anil Patnaik
Over twenty six percent of the bridges in the United States are structurally deficient or functionally obsolete. Corrosion of steel used in structures like bridges and buildings is a problem that has gained increased interest and focused concern. Steel is often the metal that is preferred for use in such applications due to a synergism of ease of availability, acceptable mechanical properties and cost effectiveness. Through the years, titanium has grown in strength, stature and significance to be recognized as an emerging high performance metal that is both stronger and lighter than steel. A distinctive property of titanium and its …
Social And Economic Sustainability, Jason Sargent, Khanjan Mehta, Katina Michael
Social And Economic Sustainability, Jason Sargent, Khanjan Mehta, Katina Michael
Professor Katina Michael
But what about long-term stability in developing nations? For example, as we strive to mainstream alternate energy sources and make them accessible in resource poor communities [ ], how do we think beyond the technological and economic dimensions and ensure respect for social, political and environmental imperatives? Computers, including the tiny but powerful ones on cell phones can be game-changers, but they will not save lives directly. They cannot be eaten by a starving population. And then, they need to be serviced and maintained. Jason, along with Katina’s husband Michael, visited and taught Karen refugee students in camps and remote …
A Game Approach To Teach Environmentally Benign Manufacturing In The Supply Chain, Donna Qualters, Jacqueline Isaacs, Thomas Cullinane, Jay Laird, Ann Mcdonald
A Game Approach To Teach Environmentally Benign Manufacturing In The Supply Chain, Donna Qualters, Jacqueline Isaacs, Thomas Cullinane, Jay Laird, Ann Mcdonald
Ann McDonald
Multidisciplinary models of education are needed to prepare students for their role in a global work environment. Combined with this need is the reality of the new Millennial Generation entering the educational system with a different approach to learning. This paper introduces an interactive, educational engineering game designed to appeal to the Millennial Generation’s learning preferences. Shortfall is a prototype board game with a team approach and a trial and error methodology to introduce students to environmentally benign manufacturing in the supply chain using the automobile industry as a model. After playing the game, quantitative analysis showed that on average, …
A Game Approach To Teach Environmentally Benign Manufacturing In The Supply Chain, Donna M. Qualters, Jacqueline A. Isaacs, Thomas P. Cullinane, Jay Laird, Ann Mcdonald
A Game Approach To Teach Environmentally Benign Manufacturing In The Supply Chain, Donna M. Qualters, Jacqueline A. Isaacs, Thomas P. Cullinane, Jay Laird, Ann Mcdonald
Jay Laird
Multidisciplinary models of education are needed to prepare students for their role in a global work environment. Combined with this need is the reality of the new Millennial Generation entering the educational system with a different approach to learning. This paper introduces an interactive, educational engineering game designed to appeal to the Millennial Generation’s learning preferences. Shortfall is a prototype board game with a team approach and a trial and error methodology to introduce students to environmentally benign manufacturing in the supply chain using the automobile industry as a model. After playing the game, quantitative analysis showed that on average, …
A Game Approach To Teach Environmentally Benign Manufacturing In The Supply Chain, Donna M. Qualters, Jacqueline A. Isaacs, Thomas P. Cullinane, Jay Laird, Ann Mcdonald
A Game Approach To Teach Environmentally Benign Manufacturing In The Supply Chain, Donna M. Qualters, Jacqueline A. Isaacs, Thomas P. Cullinane, Jay Laird, Ann Mcdonald
Thomas Cullinane
Multidisciplinary models of education are needed to prepare students for their role in a global work environment. Combined with this need is the reality of the new Millennial Generation entering the educational system with a different approach to learning. This paper introduces an interactive, educational engineering game designed to appeal to the Millennial Generation’s learning preferences. Shortfall is a prototype board game with a team approach and a trial and error methodology to introduce students to environmentally benign manufacturing in the supply chain using the automobile industry as a model. After playing the game, quantitative analysis showed that on average, …
A Game Approach To Teach Environmentally Benign Manufacturing In The Supply Chain, Donna M. Qualters, Jacqueline A. Isaacs, Thomas P. Cullinane, Jay Laird, Ann Mcdonald
A Game Approach To Teach Environmentally Benign Manufacturing In The Supply Chain, Donna M. Qualters, Jacqueline A. Isaacs, Thomas P. Cullinane, Jay Laird, Ann Mcdonald
Jacqueline Isaacs
Multidisciplinary models of education are needed to prepare students for their role in a global work environment. Combined with this need is the reality of the new Millennial Generation entering the educational system with a different approach to learning. This paper introduces an interactive, educational engineering game designed to appeal to the Millennial Generation’s learning preferences. Shortfall is a prototype board game with a team approach and a trial and error methodology to introduce students to environmentally benign manufacturing in the supply chain using the automobile industry as a model. After playing the game, quantitative analysis showed that on average, …
Action Research In Emerging Technologies In Health Information Systems: Creating A Mobile Information Environment In A Hospital Ward, Linda Dawson, Julie Fisher, Stephen Weeding, Liza Heslop, Andrew Howard
Action Research In Emerging Technologies In Health Information Systems: Creating A Mobile Information Environment In A Hospital Ward, Linda Dawson, Julie Fisher, Stephen Weeding, Liza Heslop, Andrew Howard
Associate Professor Linda Dawson
Wireless networks, mobile devices and associated applications are key emerging technologies ideal for nomadic workers such as clinicians in hospital ward settings. These mobile information environments can potentially enhance clinicians' use of patient management and clinical systems by providing decision support and clinical information at the bedside or point of care. Such technologies need to be critically assessed in a hospital environment for their wider potential and application for delivery of information at the point of care. This paper describes the use of action research methods in a project which analysed an existing clinical Information Communication Technology (ICT) environment in …
Pshell: The Distributed Shell Parallel Programming Environment, D Saffioti, Ian Piper, John Fulcher
Pshell: The Distributed Shell Parallel Programming Environment, D Saffioti, Ian Piper, John Fulcher
Dr Ian Piper
No abstract provided.
Preparing Mgb2 With Excessive Mg Environment Sintering And Two-Step Sintering Approach, S X. Dou, Sihai Zhou, Alexey V. Pan, Jaimoo Yoo, Yun Zhang, Kookchae Chung
Preparing Mgb2 With Excessive Mg Environment Sintering And Two-Step Sintering Approach, S X. Dou, Sihai Zhou, Alexey V. Pan, Jaimoo Yoo, Yun Zhang, Kookchae Chung
Shi Xue Dou
MgB2 superconductors were made with two processes in this work. In one case, the SiC doped MgB2 pellets were sintered in excessive Mg medium. It is found that the samples sintered in excessive Mg medium present Mg-rich composition comparing with the one sintered in Ar gas. The density is higher and the resistance is lower due to the penetration of the Mg into the pores and grain boundary of MgB2, which is beneficial to the Jc improvement. In the other case, a two-step process was employed to make MgB2. Jc of the sample with the composition of MgB4 is very …
An Efficient Biotreatment Process For Polyvinyl Alcohol Containing Textile Wastewater, Sandip S. Magdum, Gauri P. Minde, Upendra S. Adhyapak, Kalyanraman V.
An Efficient Biotreatment Process For Polyvinyl Alcohol Containing Textile Wastewater, Sandip S. Magdum, Gauri P. Minde, Upendra S. Adhyapak, Kalyanraman V.
Sandip S. Magdum
The aim of this work was to optimize the biodegradation of polyvinyl alcohol (PVA) containing actual textile wastewater for a sustainable treatment solution. The isolated microbial consortia of effective PVA degrader namely Candida Sp. and Pseudomonas Sp., which were responsible for symbiotic degradation of chemical oxidation demand (COD) and PVA from desizing wastewater. In the process optimization, the maximum aeration was essential to achieve a high degradation rate, where as stirring enhances further degradation and foam control. Batch experiments concluded with the need of 16 lpm/l and 150 rpm of air and stirring speed respectively for high rate of COD …
Biogas As A Sustainable Alternative For Current Energy Need Of India., Gauri P. Minde, Sandip S. Magdum, Kalyanraman V.
Biogas As A Sustainable Alternative For Current Energy Need Of India., Gauri P. Minde, Sandip S. Magdum, Kalyanraman V.
Sandip S. Magdum
Per capita energy consumption of India is declining with increasing its population, which has direct impact on national economy. Biogas technology seems promising to attain sustainable energy yields without damaging the environment. Waste management, manure creation, health care and employment foundation are the benefits of biogas system. Use of biogas assures renewable energy supply and balance of green house gases. India is traditionally using biogas since long time but there is need to improve the technology, applications and deployment strategies. Bioenergy centralization in urban and decentralization in rural can help government to minimize both the import of fuel derivatives and …
Tissue Equivalence Correction In Silicon Microdosimetry For Protons Characteristic Of The Leo Space Environment, Susanna Guatelli, Mark I. Reinhard, B Mascialino, Dale A. Prokopovich, A S. Dzurak, M Zaider, Anatoly B. Rosenfeld
Tissue Equivalence Correction In Silicon Microdosimetry For Protons Characteristic Of The Leo Space Environment, Susanna Guatelli, Mark I. Reinhard, B Mascialino, Dale A. Prokopovich, A S. Dzurak, M Zaider, Anatoly B. Rosenfeld
Susanna Guatelli
The tissue equivalence of solid state silicon detectors in proton radiation fields was determined to improve the radiation protection applications of silicon detectors in aviation and space missions. The study was performed by means of Geant4 simulations. Results are presented showing that a simple geometrical scaling factor (~0.56) of linear dimensions is adequate to convert experimentally obtained microdosimetric energy deposition spectra in silicon to equivalent microdosimetric energy deposition spectra in water.
Waypoints On A Journey Of Discovery: Mental Models In Human Environment Interactions, Timothy Lynam, Raphael Mathevet, Michel Etienne, Samantha Stone-Jovicich, Anne Leitch, Nathalie Jones, Helen Ross, Derick Du Toit, Sharon Pollard, Harry Biggs, Pascal Perez
Waypoints On A Journey Of Discovery: Mental Models In Human Environment Interactions, Timothy Lynam, Raphael Mathevet, Michel Etienne, Samantha Stone-Jovicich, Anne Leitch, Nathalie Jones, Helen Ross, Derick Du Toit, Sharon Pollard, Harry Biggs, Pascal Perez
Professor Pascal Perez
Although the broad concept of mental models is gaining currency as a way to explore the link between how people think and interact with their world, this concept is limited by a theoretical and practical understanding of how it can be applied in the study of human-environment relationships. Tools and processes are needed to be able to elicit and analyze mental models. Because mental models are not directly observable, it is also important to understand how the application of any tools and processes affects what is measured. Equally important are the needs to be clear on the intent of the …
Evaluating Participatory Modeling: Developing A Framework For Cross-Case Analysis. Socio-Economics And The Environment In Discussion (Seed), Natalie A. Jones, Pascal Perez, Thomas G. Measham, Gail J. Kelly, Patrick D'Aquino, Katherine Daniell, Anne Dray, Nils Ferrand
Evaluating Participatory Modeling: Developing A Framework For Cross-Case Analysis. Socio-Economics And The Environment In Discussion (Seed), Natalie A. Jones, Pascal Perez, Thomas G. Measham, Gail J. Kelly, Patrick D'Aquino, Katherine Daniell, Anne Dray, Nils Ferrand
Professor Pascal Perez
Participatory modeling is increasingly recognised as an effective way to assist collective decision-making processes in the domain of natural resource management. This paper introduces a framework for evaluating projects that have adopted a participatory modeling approach. This framework – known as the ‘Protocol of Canberra’ – was developed through a collaboration between French and Australian researchers engaged in participatory modeling and evaluation research. The framework seeks to assess the extent to which different participatory modeling practices reinforce or divert from the theoretical assumptions they are built upon. The paper discusses the application of the framework in three case-studies, two from …
Tissue Equivalence Correction In Silicon Microdosimetry For Protons Characteristic Of The Leo Space Environment, Susanna Guatelli, Mark I. Reinhard, B Mascialino, Dale A. Prokopovich, A S. Dzurak, M Zaider, Anatoly B. Rosenfeld
Tissue Equivalence Correction In Silicon Microdosimetry For Protons Characteristic Of The Leo Space Environment, Susanna Guatelli, Mark I. Reinhard, B Mascialino, Dale A. Prokopovich, A S. Dzurak, M Zaider, Anatoly B. Rosenfeld
Anatoly Rozenfeld
The tissue equivalence of solid state silicon detectors in proton radiation fields was determined to improve the radiation protection applications of silicon detectors in aviation and space missions. The study was performed by means of Geant4 simulations. Results are presented showing that a simple geometrical scaling factor (~0.56) of linear dimensions is adequate to convert experimentally obtained microdosimetric energy deposition spectra in silicon to equivalent microdosimetric energy deposition spectra in water.
Environmental Impacts Of Stover Removal In The Corn Belt, Alicia English, Wallace E. Tyner, Juan Sesmero, Phillip Owens, David J. Muth Jr.
Environmental Impacts Of Stover Removal In The Corn Belt, Alicia English, Wallace E. Tyner, Juan Sesmero, Phillip Owens, David J. Muth Jr.
David J. Muth
When considering the market for biomass from corn stover resources erosion and soil quality issues are important to consider. Removal of stover can be beneficial in some areas, especially when coordinated with other conservation practices, such as vegetative barrier strips and cover crops. However, benefits are highly dependent on several factors, namely if farmers see costs and benefits associated with erosion and the tradeoffs with the removal of biomass. This paper uses results from an integrated RUSLE2/WEPS model to incorporate six different regime choices, covering management, harvest and conservation, into a simple profit maximization model to show these tradeoffs.
Complications In Disassembly Line Balancing, Askiner Gungor, Surendra M. Gupta, Kishore Pochampally, Sagar V. Kamarthi
Complications In Disassembly Line Balancing, Askiner Gungor, Surendra M. Gupta, Kishore Pochampally, Sagar V. Kamarthi
Sagar Kamarthi
Disassembly line is, perhaps, the most suitable way for the disassembly of large products or small products in large quantities. In this paper, we address the disassembly line balancing problem (DLBP) and the challenges that come with it. The objective of balancing the disassembly line is to utilize the disassembly line in an optimized fashion while meeting the demand for the parts retrieved from the returned products. Although, the traditional line balancing problem for assembly has been studied for a long time, so far, no one has formally talked about the DLBP. In this work, our primary objective is to …
Economics Of Pc Recycling, Jacqueline A. Isaacs, Surendra M. Gupta, Boon E. Jane
Economics Of Pc Recycling, Jacqueline A. Isaacs, Surendra M. Gupta, Boon E. Jane
Jacqueline Isaacs
As the use of personal computers (PCs) increases, their short life cycle and the fact that they contain many hazardous materials means that their retirement and disposal represents a significant environmental concern. Many communities are mandating the recycling of these PCs, to recover parts and materials, and to minimize the amount of waste landfilled or incinerated. An industry to recycle these PCs is evolving to take advantage of this stream of materials. At present, PC recycling is not profitable. This paper investigates the factors that most influence the net cost to recycle PCs so that PC manufacturers, recyclers and legislators …
Acquisition Of Manipulation Skills From A Haptic Rendered Virtual Environment, Yan Chen, Fazel Naghdy
Acquisition Of Manipulation Skills From A Haptic Rendered Virtual Environment, Yan Chen, Fazel Naghdy
Professor Fazel Naghdy
No abstract provided.
Environmental Problems Of Industrialization And Sustainable Development In Nigeria - A Review, Adejoh Iyaji
Environmental Problems Of Industrialization And Sustainable Development In Nigeria - A Review, Adejoh Iyaji
Confluence Journal Environmental Studies (CJES), Kogi State University, Nigeria
The main objective of this paper is to examine the impact of the quest for industrialization on the environment in Nigeria; others include, the identification of the objectives of sustainable development as well as making recommendations that will lead to the much needed sustainable environment both for the present generation and generations yet unborn. The researcher relied principally on secondary sources of data for this paper which is theoretical in approach. Findings revealed the emergence of a host of environmental problems such as air pollution, deforestation, desertification, solid and hazardous waste problems in the wake of the quest for industrialization. …
Motivating Technical Writing Through Study Of The Environment, J. Linsdell, Thalia Anagnos
Motivating Technical Writing Through Study Of The Environment, J. Linsdell, Thalia Anagnos
Thalia Anagnos
Today’s engineers must be more than just technically competent. To be successful in our increasingly global economy in which teamwork and interdisciplinary interaction are the norm, engineers must have excellent communication skills. In recognition of industry needs, the San José State University College of Engineering redesigned its technical communication course to ensure that students graduate with writing and speaking skills that will transfer readily to their career needs and the global arena. The course aims to motivate students through exploring topics that are meaningful to them and using communication formats that they will see in the workplace. Combing technical communication …
New Regulations Can Stimulate Improvements In Efficiency And Sustainability For The U.S Cement Industry, Rebecca Mirsky
New Regulations Can Stimulate Improvements In Efficiency And Sustainability For The U.S Cement Industry, Rebecca Mirsky
Rebecca Mirsky
New environmental regulations on toxic and greenhouse gas emissions by cement manufacturers present the U.S. cement industry with significant challenges. This paper describes the current regulatory climate and describes a number of opportunities in which manufacturers can become more efficient in both energy and materials use. Ultimately, the new regulatory climate is seen as an opportunity for the industry to undertake long overdue modernization.