The Experts below are selected from a list of 81 Experts worldwide ranked by ideXlab platform
Ahcene Boukorca - One of the best experts on this subject based on the ideXlab platform.
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eco physic eco physical Design Initiative for very large databases
Information Systems, 2017Co-Authors: Amine Roukh, Ladjel Bellatreche, Selma Bouarar, Ahcene BoukorcaAbstract:Abstract In the Big Data Era, the management of energy consumption by servers and data centers has become a challenging issue for companies, institutions, and countries. In data-centric applications, Database Management Systems are one of the major energy consumers when executing complex queries involving very large databases. Several Initiatives have been proposed to deal with this issue, covering both the hardware and software dimensions. They can be classified in two main approaches assuming that either (a) the database is already deployed on a given platform, or (b) it is not yet deployed. In this study, we focus on the first set of Initiatives with a particular interest in physical Design, where optimization structures (e.g., indexes, materialized views) are selected to satisfy a given set of non-functional requirements such as query performance for a given workload. In this paper, we first propose an Initiative, called Eco-Physic, which integrates the energy dimension into the physical Design when selecting materialized views, one of the redundant optimization structures. Secondly, we provide a multi-objective formalization of the materialized view selection problem, considering two non-functional requirements: query performance and energy consumption while executing a given workload. Thirdly, an evolutionary algorithm is developed to solve the problem. This algorithm differs from the existing ones by being interactive, so that database administrators can adjust some energy sensitive parameters at the final stage of the algorithm execution according to their specifications. Finally, intensive experiments are conducted using our mathematical cost model and a real device for energy measurements. Results underscore the value of our approach as an effective way to save energy while optimizing queries through materialized views structures.
Amine Roukh - One of the best experts on this subject based on the ideXlab platform.
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eco physic eco physical Design Initiative for very large databases
Information Systems, 2017Co-Authors: Amine Roukh, Ladjel Bellatreche, Selma Bouarar, Ahcene BoukorcaAbstract:Abstract In the Big Data Era, the management of energy consumption by servers and data centers has become a challenging issue for companies, institutions, and countries. In data-centric applications, Database Management Systems are one of the major energy consumers when executing complex queries involving very large databases. Several Initiatives have been proposed to deal with this issue, covering both the hardware and software dimensions. They can be classified in two main approaches assuming that either (a) the database is already deployed on a given platform, or (b) it is not yet deployed. In this study, we focus on the first set of Initiatives with a particular interest in physical Design, where optimization structures (e.g., indexes, materialized views) are selected to satisfy a given set of non-functional requirements such as query performance for a given workload. In this paper, we first propose an Initiative, called Eco-Physic, which integrates the energy dimension into the physical Design when selecting materialized views, one of the redundant optimization structures. Secondly, we provide a multi-objective formalization of the materialized view selection problem, considering two non-functional requirements: query performance and energy consumption while executing a given workload. Thirdly, an evolutionary algorithm is developed to solve the problem. This algorithm differs from the existing ones by being interactive, so that database administrators can adjust some energy sensitive parameters at the final stage of the algorithm execution according to their specifications. Finally, intensive experiments are conducted using our mathematical cost model and a real device for energy measurements. Results underscore the value of our approach as an effective way to save energy while optimizing queries through materialized views structures.
Barbara A Adkins - One of the best experts on this subject based on the ideXlab platform.
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livable housing Design the voluntary provision of inclusive housing in australia
Journal of social inclusion, 2014Co-Authors: Margaret Ward, Jill M Franz, Barbara A AdkinsAbstract:This paper reports on a study of the voluntary provision of inclusive housing. The impetus for the study is the Livable Housing Design Initiative, an agreement among Australian housing industry and community leaders in 2010 to a national guideline and voluntary strategy with a target to provide minimum access features in all new housing by 2020. Situated in and around Brisbane, Australia, the study problematises the assumption that the housing industry will respond voluntarily; an assumption which this study concludes is unfounded. The Livable Housing Design Initiative asks individual agents to consider the needs of people beyond the initial contract, to proceed with objective reasoning and to do the right thing voluntarily. Instead, the study found that interviewees focused on their immediate contractual obligations, were reluctant to change established practices and saw little reason to do more than was legally required of them. This paper argues that the highlycompetitive and risk-averse nature of the industry works against a voluntary approach for inclusive housing and, if the 2020 target of the Livable Housing Design
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livable housing Design the voluntary provision of inclusive housing in australia
Creative Industries Faculty, 2014Co-Authors: Margaret Ward, Jill M Franz, Barbara A AdkinsAbstract:This paper reports on a study of the voluntary provision of inclusive housing. The impetus for the study is the Livable Housing Design Initiative, an agreement among Australian housing industry and community leaders in 2010 to a national guideline and voluntary strategy with a target to provide minimum access features in all new housing by 2020. Situated in and around Brisbane, Australia, the study problematises the assumption that the housing industry will respond voluntarily; an assumption which this study concludes is unfounded. The Livable Housing Design Initiative asks individual agents to consider the needs of people beyond the initial contract, to proceed with objective reasoning and to do the right thing voluntarily. Instead, the study found that interviewees focused on their immediate contractual obligations, were reluctant to change established practices and saw little reason to do more than was legally required of them. This paper argues that the highly-competitive and risk-averse nature of the industry works against a voluntary approach for inclusive housing and, if the 2020 target of the Livable Housing Design Initiative is to be reached, a mandated approach through legislation will be necessary. The Livable Housing Design Initiative, however, has an important role to play in preparing the Australian housing industry to accept further regulation.
Francis C Mcmichael - One of the best experts on this subject based on the ideXlab platform.
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disposition and end of life options for personal computers
1998Co-Authors: Scott H Matthews, Francis C Mcmichael, Chris HendricksonAbstract:A widely cited 1991 study predicted that nearly 150 million personal computers (PCs) would be sent to landfills by 2005. Taking into consideration newer end-of-life disposition options now available, the general premise of the original study is reconsidered. Many fewer computers are being sent to landfills, as many more are being recycled as markets for used computers and electronic equipment develop. Many are still being stored, despite the unprofitable nature of storage. The updated model suggests that nearly 150 million computers will be recycled in 2005– the same number initially predicted to be landfilled. Instead, we predict that only 55 million will be landfilled. In addition, the equivalent of 15 million PCs will be landfilled from the unused portions of the 150 million recycled computers. In essence, the computers sentenced to death in landfills in 1991 have been given a second life in newly established recycled electronic goods markets. Carnegie Mellon University Green Design Initiative Technical Report #97-10
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comparing two life cycle assessment approaches a process model vs economic input output based assessment
International Symposium on Electronics and the Environment, 1997Co-Authors: Chris Hendrickson, Arpad Horvath, Satish Joshi, M Klausner, Lester B Lave, Francis C McmichaelAbstract:We compare two tools for Life Cycle Assessment (LCA). The software GaBi (Ganzheitliche Bilanzierung Integrated Assessment) from Germany is based on a process model approach, as recommended by the Society of Environmental Toxicology and Chemistry (SETAC). These results are contrasted to those from the method developed by Carnegie Mellon University's Green Design Initiative, Economic Input-Output Life Cycle Analysis (EIO-LCA). The EIO-LCA model uses economic input-output matrices, and industry sector level environmental and nonrenewable resource consumption data to assesses the economy-wide environmental impacts of products and processes. The results from the alternative approaches are compared in terms of toxic chemical releases, conventional pollutant emissions, energy use by fuel type, and use of ores. We find that most of the values from the two tools are within the same order of magnitude, despite the fundamental differences in the models. We contrast the two approaches to identify their relative strengths and weaknesses.
Ladjel Bellatreche - One of the best experts on this subject based on the ideXlab platform.
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eco physic eco physical Design Initiative for very large databases
Information Systems, 2017Co-Authors: Amine Roukh, Ladjel Bellatreche, Selma Bouarar, Ahcene BoukorcaAbstract:Abstract In the Big Data Era, the management of energy consumption by servers and data centers has become a challenging issue for companies, institutions, and countries. In data-centric applications, Database Management Systems are one of the major energy consumers when executing complex queries involving very large databases. Several Initiatives have been proposed to deal with this issue, covering both the hardware and software dimensions. They can be classified in two main approaches assuming that either (a) the database is already deployed on a given platform, or (b) it is not yet deployed. In this study, we focus on the first set of Initiatives with a particular interest in physical Design, where optimization structures (e.g., indexes, materialized views) are selected to satisfy a given set of non-functional requirements such as query performance for a given workload. In this paper, we first propose an Initiative, called Eco-Physic, which integrates the energy dimension into the physical Design when selecting materialized views, one of the redundant optimization structures. Secondly, we provide a multi-objective formalization of the materialized view selection problem, considering two non-functional requirements: query performance and energy consumption while executing a given workload. Thirdly, an evolutionary algorithm is developed to solve the problem. This algorithm differs from the existing ones by being interactive, so that database administrators can adjust some energy sensitive parameters at the final stage of the algorithm execution according to their specifications. Finally, intensive experiments are conducted using our mathematical cost model and a real device for energy measurements. Results underscore the value of our approach as an effective way to save energy while optimizing queries through materialized views structures.