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Determination of intrinsic permeability for packed waste of Indonesian solid waste

ITB Journal of engineering Science 2010年第2期42 B卷 137-150页

作者： Rahardyan, Benno Dwirestiani, Retno Padmi, Tri Environmental Engineering Study Program Faculty of Civil and Environmental Engineering Institute of Technology Bandung

Gas permeability and intrinsic permeability are the major parameters to promote aeration for packed waste. The objectives of this research are to identify physical parameters of gas transfer from a various type of packed wastes and examine ventilation design theory for landfill to enhance waste stabilization. Method to determine value of gas permeability and intrinsic permeability for packed waste is by flushing the packed column containing various type and physical characteristics of wastes with an air pump. Permeability was calculated by measuring pressure gradient on sampling points of the column using inclined manometer at distance 10 cm, 23 cm, 46 cm, 69 cm, 92 cm and 115 cm from origin. Gas permeability is specifically relied on physical parameters of wastes as follows, density, moisture content, particle size and gas velocity on the surface of compacted waste layer. Compost has finer pore structure and smaller pore size than leaves as well as mixed organic (65%) and inorganic wastes (35%). The experiment found the intrinsic permeability of leaves waste are in the order of 10-11 to 10-8 m2, 10-11 to 10-9 m2 for compost and 10-9 m2 for mixed organic (65%) and inorganic wastes (35%).

关键词： Gas permeability

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Application of physical modeling for measuring the efficiency of pontoon-type breakwaters

Application of physical modeling for measuring the efficienc...

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20th International Offshore and Polar engineering Conference, ISOPE-2010

作者： Ajiwibowo, Harman Yuanita, Nita Zamzami, Rahmat Ocean Engineering Program Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Bandung West Java Indonesia

ISBN: (纸本)9781880653777

The efficiency of pontoon-type breakwaters can be expressed by the transmission coefficient, KT. Physical modeling of pontoon-type breakwaters was conducted using a 2D wave flume at the Ocean Wave Research Laboratory (FCEE ITB) in Bandung Indonesia. To identify the coefficient K T, two designs of floating breakwaters with different dimensions were investigated. Environmental conditions and dimensions of pontoons were scaled considering Froude Similarity. Wave heights (H) and periods (T) of data were observed both manually and digitally using wave probes. The relationship between KT and non-dimensional variables obtained are apparently valid for limited conditions within the experimental data range. © 2010 by The International Society of Offshore and Polar Engineers (ISOPE).

关键词： Efficiency

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Implied obligations in construction contracts

Implied obligations in construction contracts

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2010 2nd International Conference on engineering System Management and Applications, ICESMA 2010

作者： Gaber, Rami Jarwan, Alya Al. Sharif, Alauddin Beheiry, Salwa El. Masters of Science in Engineering Systems Management College of Engineering American University of Sharjah Sharjah United Arab Emirates Civil Engineering Program Faculty of College of Engineering American University of Sharjah Sharjah United Arab Emirates

ISBN: (纸本)9781424465200

In a fast moving highly competitive business hub;the process of Construction Contracts preparation is usually shortened by resorting to previously prepared forms of agreement templates. Even if due diligence is carried out during the contract preparation stage, it becomes extremely difficult to anticipate for and include every single contingency that may arise from contract misinterpretation resulted from implicit terms. As such, to mitigate being involved in numerous disputes and arbitration cases due to contractual "gaps", all parties bounded by a binding agreement are recommended to be aware of their Implied Obligations and ensure that their implicit duties are accommodated for, as appropriate, within the construction contract. In this study, a survey measuring the gap between perceptions of 13 pre-identified Implied Obligations and actual experiences has been created and collected from 30 people out of 100 surveys sent out that had demonstrated even though most of the Implied Terms pre-identified are generally agreed on as Obligations by most parties involved in a contract, they are;however, rarely experienced most of the time. This indicates the potential of a high number of claim cases arising due to these contractual gaps.

关键词： Surveys

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Sustainable Solutions for Municipal Solid Waste Management in Thailand

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Journal of civil engineering and Architecture 2010年第3期4卷 57-65页

作者： Thaniya Kaosol Environmental Engineering Program Department of Civil Engineering Faculty of Engineering Prince of Songkla University Songkla 90112 Thailand

General as well as the municipal solid waste （MSW） management in Thailand is reviewed in this paper. Topics include the MSW generation, sources, composition and trends. The review, then, moves to sustainable solutions for MSW management and sustainable alternative approaches with an emphasis on an integrated MSW management. Information of waste in Thailand is also given at the beginning of this paper for better understanding of later contents. It is clear that no one single method of MSW disposal can deal with all materials in an environmentally sustainable way. As such, a suitable approach in MSW management should be an integrated approach that could deliver both environmental and economic sustainability. With increasing environmental concerns, the integrated MSW management system has a potential to maximize the useable waste materials as well as produce energy as a by-product. In Thailand, the compositions of waste （86%） are mainly organic waste, paper, plastic, glass and metal. As a result, the waste in Thailand is suitable for an integrated MSW management. Currently, the Thai national waste management policy starts to encourage the local administrations to gather into clusters, to establish central MSW disposal facilities with suitable technologies and reducing the disposal cost based on the amount of MSW generated.

关键词： MSW management sustainable Thailand.

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Multiple perspectives on engaging future engineers

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Journal of engineering Education 2011年第1期100卷 48-88页

作者： Adams, Robin Evangelou, Demetra English, Lyn De Figueiredo, Antonio Dias Mousoulides, Nicholas Pawley, Alice L. Schifellite, Carmen Stevens, Reed Svinicki, Marilla Trenor, Julie Martin Wilson, Denise M. School of Engineering Education Purdue University 1233 Armstrong Hall 701 West Stadium Ave. West Lafayette IN 47907-2045 United States School of Engineering Education Purdue University 1323 Armstrong Hall 701 West Stadium Ave. West Lafayette IN 47907-2045 United States School of Mathematics Science and Technology Education Queensland University of Technology Faculty of Education Victoria Park Road Kelvin Grove QLD 4059 Australia University of Coimbra Portugal Department of Informatics Engineering Polo 2 3030-290 Coimbra Portugal School of Engineering and Technology Department of Civil Engineering and Geomatics Cyprus University of Technology P.O.Box 50329 3603 Lemesos Cyprus Women's Studies Program Purdue University 1325 Armstrong Hall 701 West Stadium Ave. West Lafayette IN 47905-2045 United States Department of Sociology Ryerson University 350 Victoria Street Toronto ON M5B 2K3 Canada Faculty of Education Brock University St. Catharines ON Canada Department of Learning Sciences Northwestern University 2120 Campus Drive Evanston IL 60208-0001 United States Department of Educational Psychology University of Texas Austin United States Educational Psychology Department 1 University Station D5800 Austin TX 78712-1294 United States Department of Engineering and Science Education Clemson University 105 Holtzendorff Hall Clemson SC 29634 United States Department of Electrical Engineering University of Washington Seattle Paul Allen Center 185 Stevens Way Seattle WA 98195-2500 United States

BACKGROUND: Engaging future engineers is a central topic in everyday conversations on engineering education. Considerable investments have been made to make engineering more engaging, recruit and retain aspiring engineers, and to design an education to prepare future engineers. However, the impact of these efforts has been less than intended. It is imperative that the community reflects on progress and sets a more effective path for the future. PURPOSE: The purpose of this article is to map a new innovation landscape for what it means to engage future engineers. This is a theoretically grounded divergent-thinking effort to enable a broader space of high impact innovations for engaging future engineers. SCOPE/METHOD: A multiple perspectives methodology drawing from innovation, cross-disciplinary, and boundary work frameworks was used to make visible multiple facets of engaging future engineers. Scholars from diverse communities of thought and discourse were selected to present interparadigmatic perspectives, act as boundary agents, challenge and transform current ways of thinking, and illustrate new opportunities for engineering education innovation. CONCLUSIONS: A new innovation landscape for engaging future engineers is needed, one that emphasizes epistemological development and social justice, new configurations on engineering thinking and connecting to the formative years of development, the entwinement of engineering knowing and being, and mutually informing consequences for opening up a broader space for *** also need to adopt strategies and tools for using a multiple perspectives approach to better understand complex engineering education problems. © 2011 ASEE.

关键词： Engineers

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Optical Properties of （100） Preferred Oriented Titanium-Doped Zinc Oxide Thin Films and Their Electron Trapping Phenomena

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材料科学与工程（中英文版） 2010年第11期4卷 1-7页

作者： Leanddas Nurdiwijayanto Bambang Sunendar Purwasasmita Engineering Physics Research Groups Laboratory of Material Processing Engineering Physics Study Program Faculty of Industrial Technology Institut Teknologi Bandung West Java 40134 Indonesia

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Co-processing of grinding sludge as alternative raw material in portland cement clinker production

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Journal of Applied Sciences 2010年第15期10卷 1525-1535页

作者： Punmatharith, T. Rachakornkij, M. Imyim, A. Wecharatana, M. International Postgraduate Program in Environmental Management Graduate School Chulalongkorn University Bangkok 10330 Thailand National Center of Excellence for Environmental and Hazardous Waste Management Chulalongkorn University Bangkok 10330 Thailand Department of Environmental Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand Department of Chemistry Faculty of Science Chulalongkorn University Bangkok 10330 Thailand Department of Civil and Environmental Engineering Faculty of Engineering New Jersey's Science and Technology University Newark NJ 07102-1982 United States

This research aimed to investigate the potential of partial substitution of cement raw meal with grinding sludge as an alternative raw material in Portland cement clinker production. Cement raw mixtures with up to 3% raw mix replacement were put through a burning process in a high-temperature furnace. One reference and three modified mixtures, containing 1, 2 and 3% dry weight of grinding sludge were examined. XRF analysis results showed that CaO, SiO2, A12O3 and Fe2O3 in ordinary cement raw meal were within typical concentration ranges. The grinding sludge had high concentrations of iron, cadmium, chromium and nickel and was consequently classified as a hazardous waste. High Fe2O3 made the grinding sludge a good candidate for alternative raw material. Higher replacement of grinding sludge was found to improve burnability, reduce formation of major of cement compositions (dicalcium silicate, C2S and tricalcium aluminate, C3A), lower in silica and alumina ratios, but promote the formation of tricalcium silicate (C3S) and tetracalcium aluminateferrite (C4AF). Microstructural analysis of the synthesized Portland clinker revealed that the grinding sludge promoted formation of secondary C2S as well as caused color change of C3S. Thai regulatory leaching procedure was performed on the synthesized clinker and mortar samples. The concentrations of heavy metals in the leachate were found below the limits. Moreover, the maximum substitution of grinding sludge was found to be 2% of grinding sludge. Thus, this sludge has potential applications as an alternative raw material in cement production. © 2010 Asian Network for Scientific Information.

关键词： Heavy metals

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Green walls: Environmental quality in buildings

Green walls: Environmental quality in buildings

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26th International Conference on Passive and Low Energy Architecture: Architecture Energy and the Occupant's Perspective, PLEA 2009

作者： De Oliviera Morelli, Denise Damas Labaki, Lucila Chabel Post Graduation Program Faculty of Civil Engineering Architecture and Building State University of Campinas Campinas Brazil

ISBN: (纸本)9782763789392

The use of creeper in building walls is an important tool for architecture and engineering professionals, in the search of thermal comfort and energy efficiency. Creepers used as facade elements minimize the heat gain indoors, provide a better thermal condition and refinement performance of the construction. If green walls are thought of since the preliminary design stages - elaboration of necessity program, through even the stage of postoccupation evaluation, they can improve the performance of the built environment. In this paper information is being obtained in the evaluation of the thermal performance through measurements in two identical buildings, one of them with creeper and the second without creeper in the facades. The field work is being realized with the creeper Parthenocissus tricuspidata (ivy-japanese.,) In order to get information about the performance of the buildings, the environmental parameters were measured indoor and in the external area: air and globe temperature, relative humidity, wind speed, surface temperature of the internal and external walls. Results show differences in the performance of the two buildings. It can be concluded that the use of the vegetation at the facades can contribute in specific interventions in the development of practical instruments for the programs of thermal comfort and improvement of the performance in the built environment.

关键词： Thermal comfort

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Application of electrical resistivity Imaging technique in slope Stability study in banding island, perak

Application of electrical resistivity Imaging technique in s...

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International Conference for Technical Postgraduates 2009, TECHPOS 2009

作者： Ismail, Siti Aishah Ibrahim, Shaharin Ramli, Muhammad Firuz Huat, Bujang Kim Prasad, Arun Department of Environmental Science Faculty of Environmental Study Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia Department of Civil Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia

ISBN: (纸本)9781424452231

A landslide investigation using 2D electrical resistivity imaging (ERI) has been undertaken in the Banding Island, Perak. Banding Island is underlain by Baling Formation which consist of two main facies;namely Argillaceous Facie (eastern part) and Arenaceous Facie (western part). The eastern part of the island is relatively prone to landslide and slope failure. Detailed field resistivity imaging was carried on four lines along the eastern and western parts of the Banding Island. The inferred lithological depth sections based on electrical properties clearly differentiates between the different types of rocks.

关键词： Landslides

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Special session - Come on down: Multiple pedagogical options using game show formats

Special session - Come on down: Multiple pedagogical options...

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39th Annual Frontiers in Education Conference: Imagining and engineering Future CSET Education, FIE 2009

作者： Karlin, Jennifer Surovek, Andrea South Dakota School of Mines and Technology United States Department of Industrial Engineering New Faculty Development Program South Dakota School of Mines and Technology United States Department of Civil and Environmental Engineering United States

ISBN: (纸本)9781424447152

Injecting a sense of play into the classroom carries many positive benefits. While game show formats in the classroom are neither new nor restricted to engineering and computer science, they are a powerful tool for bringing in that sense of play into the learning environment. Game show formats can be used to deliver new content, more deeply explore concepts in a problembased course, discover on which points the students need more help, and review content already learned. This immersive special session will demonstrate and discuss using the game show format in three different situations: knowledge-based content with either individuals or teams;problem solving content with teams;and decision making with teams. The goal of this special session is to demonstrate the versatility of the game show format for injecting play into the classroom while supporting a wide variety of learning goals. Additionally, participants will leave the session with tools to reduce the implementation cost of using the game show format in their own classes and labs. ©2009 IEEE.

关键词： Problem solving

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