The Experts below are selected from a list of 162117 Experts worldwide ranked by ideXlab platform
Shiliang Liu - One of the best experts on this subject based on the ideXlab platform.
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indicators sensitivity analysis for Environmental Engineering geological patterns caused by underground coal mining with integrating variable weight theory and improved matter element extension model
Science of The Total Environment, 2019Co-Authors: Shiliang LiuAbstract:Abstract This research utilized the variable weight theory (VWT) and improved the matter-element extension model (MEEM) to conduct an indicators sensitivity analysis of Environmental Engineering geological patterns (EEGPs) related to underground coal mining. First, four types of EEGPs, i.e., basically unaffected model, gradually restored model after destruction, gradually deteriorated model and disaster model, were defined. Subsequently, 13 indicators were selected from different spheres. Then, a sensitivity analysis for EEGPs was conducted by VWT and improved MEEM. On the basis of changes in indicator values by ±10–50%, indicators sensitivity was separately determined in four types of EEGPs. In conclusion, rainfall capacity, evaporation capacity and normalized difference vegetation index (NDVI) are sensitive indicators in a basically unaffected model, while the thicknesses of the coal seam and laterite are sensitive indicators in the other three EEGPs. For comparison, types of EEGPs were tested by both VWT and traditional MEEM, verifying the accuracy of indicators sensitivity results and reasonability by VWT and improved MEEM method. Finally, mining measures such as layered, stripe, filling mining and grouting reinforce method corresponding to thicknesses of coal seam and laterite were proposed. Therefore, specific mining methods under types of EEGPs can be provided to decision-makers in the mining industry and to Environmental protection departments.
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zoning method for Environmental Engineering geological patterns in underground coal mining areas
Science of The Total Environment, 2018Co-Authors: Shiliang Liu, Qiqing WangAbstract:Environmental Engineering geological patterns (EEGPs) are used to express the trend and intensity of eco-geological environment caused by mining in underground coal mining areas, a complex process controlled by multiple factors. A new zoning method for EEGPs was developed based on the variable-weight theory (VWT), where the weights of factors vary with their value. The method was applied to the Yushenfu mining area, Shaanxi, China. First, the mechanism of the EEGPs caused by mining was elucidated, and four types of EEGPs were proposed. Subsequently, 13 key control factors were selected from mining conditions, lithosphere, hydrosphere, ecosphere, and climatic conditions; their thematic maps were constructed using ArcGIS software and remote-sensing technologies. Then, a stimulation-punishment variable-weight model derived from the partition of basic evaluation unit of study area, construction of partition state-variable-weight vector, and determination of variable-weight interval was built to calculate the variable weights of each factor. On this basis, a zoning mathematical model of EEGPs was established, and the zoning results were analyzed. For comparison, the traditional constant-weight theory (CWT) was also applied to divide the EEGPs. Finally, the zoning results obtained using VWT and CWT were compared. The verification of field investigation indicates that VWT is more accurate and reliable than CWT. The zoning results are consistent with the actual situations and the key of planning design for the rational development of coal resources and protection of eco-geological environment.
Qiqing Wang - One of the best experts on this subject based on the ideXlab platform.
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zoning method for Environmental Engineering geological patterns in underground coal mining areas
Science of The Total Environment, 2018Co-Authors: Shiliang Liu, Qiqing WangAbstract:Environmental Engineering geological patterns (EEGPs) are used to express the trend and intensity of eco-geological environment caused by mining in underground coal mining areas, a complex process controlled by multiple factors. A new zoning method for EEGPs was developed based on the variable-weight theory (VWT), where the weights of factors vary with their value. The method was applied to the Yushenfu mining area, Shaanxi, China. First, the mechanism of the EEGPs caused by mining was elucidated, and four types of EEGPs were proposed. Subsequently, 13 key control factors were selected from mining conditions, lithosphere, hydrosphere, ecosphere, and climatic conditions; their thematic maps were constructed using ArcGIS software and remote-sensing technologies. Then, a stimulation-punishment variable-weight model derived from the partition of basic evaluation unit of study area, construction of partition state-variable-weight vector, and determination of variable-weight interval was built to calculate the variable weights of each factor. On this basis, a zoning mathematical model of EEGPs was established, and the zoning results were analyzed. For comparison, the traditional constant-weight theory (CWT) was also applied to divide the EEGPs. Finally, the zoning results obtained using VWT and CWT were compared. The verification of field investigation indicates that VWT is more accurate and reliable than CWT. The zoning results are consistent with the actual situations and the key of planning design for the rational development of coal resources and protection of eco-geological environment.
Kurt Paterson - One of the best experts on this subject based on the ideXlab platform.
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student perceptions of internet based learning tools in Environmental Engineering education
Journal of Engineering Education, 1999Co-Authors: Kurt PatersonAbstract:The Internet provides an excellent framework for learning, communication, information exchange, and collaboration in Engineering education. This existing electronic infrastructure was integrated into an undergraduate Environmental Engineering course in atmospheric physics and chemistry to foster discussion of course topics, peer evaluation, and collaborative learning. Four major Internet-based learning tools were utilized to accomplish these objectives: 1) electronic copies of partial notes allowed students to remain engaged during class, 2) an electronic bulletin board enabled interactive discussion and peer evaluation of work, 3) multimedia assignments required students to retrieve information and direct their learning, 4) publicly accessible and peer-reviewed Internet-based term project reports provided motivation for quality and creative work. Student response to these new approaches was overwhelmingly positive, although preferences vary with learning style. While students assess many Internet-based learning approaches as useful, conventional educational approaches are still viewed as important components to successful learning.
Angela R Bielefeldt - One of the best experts on this subject based on the ideXlab platform.
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pedagogies to achieve sustainability learning outcomes in civil and Environmental Engineering students
Sustainability, 2013Co-Authors: Angela R BielefeldtAbstract:The civil and Environmental Engineering disciplines have identified the levels of knowledge about sustainability that are desirable for students to achieve as they graduate with a bachelor’s degree, as well as sustainability-related competencies to be obtained during a master’s degree, and on-the-job, prior to professional licensure. Different pedagogies are better suited to help students attain these levels of cognitive ability, while also developing affective outcomes. This paper provides examples of different methods that have been used at one institution to educate Engineering students about sustainability, supported with data that indicates whether the method successfully achieved the targeted learning outcomes. Lectures, in-class active learning, readings, and appropriately targeted homework assignments can achieve basic sustainability knowledge and comprehension by requiring students to define, identify, and explain aspects of sustainability. Case studies and the application of software tools are good methods to achieve application and analysis competencies. Project-based learning (PBL) and project-based service-learning (PBSL) design projects can reach the synthesis level and may also develop affective outcomes related to sustainability. The results provide examples that may apply to a wider range of disciplines and suggest sustainability outcomes that are particularly difficult to teach and/or assess.
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incorporating a sustainability module into first year courses for civil and Environmental Engineering students
Journal of Professional Issues in Engineering Education and Practice, 2011Co-Authors: Angela R BielefeldtAbstract:As articulated in the Bodies of Knowledge for Civil Engineering and Environmental Engineering, all civil and Environmental Engineering students should be introduced to the concept of sustainability. A sustainability module was added into two required first-year, 1-credit introductory courses, one for civil Engineering and one for Environmental Engineering. Data from approximately 150 students were collected. Student attitudes about sustainability were evaluated using a written survey. There was greater initial knowledge of sustainability and positive attitudes toward sustainability among students enrolled in the Environmental Engineering course compared with those in the civil Engineering course, but this did not translate into better performance on the related homework assignment. There was strong evidence that the inclusion of the sustainability module encouraged the students to consider sustainability in subsequent course assignments, even when not explicitly prompted to do so. This indicates that earl...
Denis Jongmans - One of the best experts on this subject based on the ideXlab platform.
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introduction to the jeeg nsg geotechnical assessment and geo Environmental Engineering geophysics special issue
Journal of Environmental and Engineering Geophysics, 2013Co-Authors: Moe Momayez, Fred Kofi Boadu, Nigel J Cassidy, Denis JongmansAbstract:Experts say that the near-surface geophysics community will witness a rapid growth over the next decade. The recent surge in the development of new technologies and analysis tools lends weight to that theory, and today we have numerous means to solve many of the complex Engineering problems associated with the natural and built environments. Assessing the stability and integrity of structures such as buildings, bridges, dams, roads, water ways, foundations, underground excavations, mines, landfills, and sinkholes often requires a multi-disciplinary approach and collaboration between experts in geophysics, hydrology, geotechnical and Environmental Engineering, and geology. A trend to objectify the information about the condition of a structure is beginning to emerge: the development of tools to appraise and integrate data from sources of similar and dissimilar nature. This Special Joint-Issue of the Journal of Environmental and Engineering Geophysics and Near Surface Geophysics entitled “Geotechnical Assessment and Geo-Environmental Engineering” is a selection of original contributions organized under two themes. Near Surface Geophysics presents eight articles on the application of the electrical resistivity techniques to determine the geotechnical properties of the ground, and the integration of geophysical and geotechnical data. The Journal of Environmental and Engineering Geophysics contains seven papers that investigate the stability of structures using seismic techniques. The articles presented in this special joint-issue were selected from a pool of over forty manuscript submissions never published before. The papers are peer-reviewed by a panel of experts from around the world and are at the forefront of the current state-of-knowledge. We hope that both researchers and professionals responsible for site and geomaterials characterization will find the information contained in this collection of practical use. In the paper “ Seismic surface-wave prospecting methods for sinkhole hazard assessment along the Dead Sea shoreline ”, Ezersky et al. present the results of a surface-wave investigation …
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introduction to the jeeg nsg geotechnical assessment and geo Environmental Engineering geophysics special issue
Near Surface Geophysics, 2013Co-Authors: Moe Momayez, Fred Kofi Boadu, Nigel J Cassidy, Denis JongmansAbstract:This Special Joint-Issue of the Journal of Environmental and Engineering Geophysics and Near Surface Geophysics entitled “Geotechnical Assessment and Geo-Environmental Engineering” is a selection of original contributions organized under two themes. Near Surface Geophysics presents eight articles on the application of the electrical resistivity techniques to determine the geotechnical properties of the ground, and the integration of geophysical and geotechnical data. The Journal of Environmental and Engineering Geophysics contains seven papers that investigate the stability of structures using seismic techniques. The articles presented in this special joint-issue were selected from a pool of over forty manuscript submissions never published before. The papers are peer-reviewed by a panel of experts from around the world and are at the forefront of the current state-ofknowledge. We hope that both researchers and professionals responsible for site and geomaterials characterization will find the information contained in this collection of practical use.
