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Articles 31 - 45 of 45
Full-Text Articles in Architecture
Development Of A Novel Methodology For Indoor Emission Source Identification, Kwanghoon Han
Development Of A Novel Methodology For Indoor Emission Source Identification, Kwanghoon Han
Kwanghoon Han
The objective of this study was to develop and evaluate a methodology to identify individual sources of emissions based on the measurements of mixed air samples and the emission signatures of individual materials previously determined by Proton Transfer Reaction-Mass Spectrometry (PTR-MS), an on-line analytical device. The methodology based on signal processing principles was developed by employing the method of multiple regression least squares (MRLS) and a normalization technique. Samples of nine typical building materials were tested individually and in combination, including carpet, ceiling material, gypsum board, linoleum, two paints, polyolefine, PVC and wood. Volatile Organic Compound (VOC) emissions from each …
Asce 7–05 Design Rule For Relative Strength In A Tall Buckling-Restrained Braced Frame Dual System, Lisa J. Aukeman
Asce 7–05 Design Rule For Relative Strength In A Tall Buckling-Restrained Braced Frame Dual System, Lisa J. Aukeman
Master's Theses
In mid- to high-rise structures, dual systems (DS) enable a structural designer to satisfy the stringent drift limitations of current codes without compromising ductility. Currently, ASCE 7-05 permits a variety of structural systems to be used in combination as a dual system yet the design requirements are limited to the following statement: Moment frames must be capable of resisting 25% of the seismic forces while the moment frames and braced frames or shear walls must be capable of resisting the entire seismic forces in proportion to their relative rigidities.
This thesis assesses the significance of the 25% design requirement for …
Significance Of Community In Sustainability Of Malaysian Higher Educational Institutions., Omidreza Saadatian
Significance Of Community In Sustainability Of Malaysian Higher Educational Institutions., Omidreza Saadatian
No abstract provided.
Bioretention: Evaluating Their Effectiveness For Improving Water Quality In New England Urban Environments, Mary Dehais
Bioretention: Evaluating Their Effectiveness For Improving Water Quality In New England Urban Environments, Mary Dehais
Masters Theses 1911 - February 2014
Nonpoint source (NPS) pollution is one of the leading causes of water quality problems in the United States. Bioretention has become one of the more frequently used stormwater management practices for addressing NPS pollution in urbanized watersheds in New England. Yet despite increased acceptance, bioretention is not widely practiced. This study explores and evaluates the efficacy of bioretention for protecting urban water quality.
This research found that numerous monitoring methods are used by researchers and industry experts to assess the effectiveness of stormwater best management practices (BMPs) and low impact development (LID) practices that include bioretention. The two most common …
A Financial Impact Assessment Of Ld 1725: Stream Crossings, New England Environmental Finance Center, Muskie School Of Public Service
A Financial Impact Assessment Of Ld 1725: Stream Crossings, New England Environmental Finance Center, Muskie School Of Public Service
Water
This report looks at the potential financial impact of LD 1725 on the estimated 30,000 stream crossings in the State of Maine that would be affected by the law. Our research for this report included the analysis of nearly 2000 stream crossings and the data collection necessary for the development of extensive stream crossing replacement cost models. We found that the 1.2 bankfull requirements in LD 1725 would result in a 75% ‐ 250% increase in structure widths for stream crossing projects across the state. An upsize of this magnitude would increase the cost of replacing stream crossings statewide by …
Sustainable Design Optimization Of Rural Houses In North China, Mingliang Li
Sustainable Design Optimization Of Rural Houses In North China, Mingliang Li
Purdue Polytechnic Masters Theses
With the rapid economic development of China, the living standards in rural areas have been experiencing improvement over the past two decades. One important aspect of the improved living standards is housing, which has been transformed from traditional adobe or stone structures into modern brick and concrete ones. In the meantime, active heating and cooling systems are gradually being incorporated and residents are requiring more comfortable indoor air temperatures during cold winters and hot summers. However, most rural houses have no insulation in their exterior walls and roofs. The question is whether or not it is economically viable to build …
Methodology To Convert A Transportation Planning Origin-Destination Matrix Into A Microscopic Traffic Simulation Origin-Destination Matrix, Jose Osiris Vidana-Bencomo
Methodology To Convert A Transportation Planning Origin-Destination Matrix Into A Microscopic Traffic Simulation Origin-Destination Matrix, Jose Osiris Vidana-Bencomo
Open Access Theses & Dissertations
Microscopic traffic simulation (MTS) is a cost-effective approach for the evaluation of traffic conditions in urban highways networks. In MTS models, traffic demand that is entered into the network is specified by one or several Origin-Destination (O-D) matrices. A major challenge in the application of MTS for large urban networks is the specification of the O-D matrices. This dissertation proposes a methodology that may be used to transform a O-D matrix from a transportation planning model (which is based on Traffic Analysis Zone, or TAZ, and is readily available) into a O-D matrix for a MTS model (which is traffic …
A Web-Based Learning Module For Teaching Gis Within The Context Of Environmental Engineering, Sirjana Dahal, Richard H. Hall, Glenn Morrison, Seth Paul Lamble, Ronaldo Luna
A Web-Based Learning Module For Teaching Gis Within The Context Of Environmental Engineering, Sirjana Dahal, Richard H. Hall, Glenn Morrison, Seth Paul Lamble, Ronaldo Luna
Business and Information Technology Faculty Research & Creative Works
There is a Growing Need for Teaching Geographical Information Systems (GIS) in Engineering Disciplines, Such as Environmental. However, There Has Been Limited Focus on GIS in Undergraduate Programs, Since It's Difficult to Fit a GIS Class into the Large Number of Class Requirements Already Included in Engineering Curricula. the Purpose of This Research is the Evaluation of Web-Based Learning Module Created by a Multidisciplinary Team at a Midwestern Technological Research University, Which Allows Instructors to Integrate GIS Instruction into Existing Courses. This Module is One Part of a Large-Scale National Science Foundation Funded Project in Which GIS Modules Are Being …
Localization Of Free-Spanning Damage Using Mode Shape Curvature, Guirong Yan, Xuelin Peng, Hong Hao
Localization Of Free-Spanning Damage Using Mode Shape Curvature, Guirong Yan, Xuelin Peng, Hong Hao
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
This Study Proposes a Damage Indicator based on Mode Shape Curvature to Localize Free-Spanning Damage of Submarine Pipeline Systems. the Feasibility of Curvatures of Low-Frequency Mode Shapes for Localizing Free-Spanning Damage of Pipeline Systems is Discussed, and Damage Indicators based on Mode Shape Curvatures Are Proposed. the Efficacy of the Proposed Damage Indicators is Demonstrated by Numerical Simulations of Dynamic Responses of a Submarine Pipeline under Ambient Conditions with Considering the Real Subsea Environment. the Proposed Approach is Simple, Which Does Not Require Baseline Data, and Thus is Promising in Practical Applications. © 2011 Published under Licence by IOP Publishing …
Material And Energy Flow Analysis Of The Irish Construction Sector, Rachel Woodward
Material And Energy Flow Analysis Of The Irish Construction Sector, Rachel Woodward
Theses
A national flow model for concrete was developed using the framework of material and energy flow analysis. Using this framework, the Irish concrete material and energy cycles for the year 2007 were constructed by firstly analysing the material life cycle of concrete which consists of the three phases of production (including extraction of raw materials and manufacture of cement), usage into stock (ready-mix and other concrete products), and waste management. In this year, approximately 35Mt of raw materials were extracted to produce both 5Mt of cement and 33Mt of concrete, with 4.5Mt of cement going into the production of concrete. …
Physical Impact Of Waterjet-Based Sediment Remediation On Benthic Organisms, Grace Harper, Andrew Curtis Elmore, Christopher Redell, Gavin Risley, Joel Gerard Burken
Physical Impact Of Waterjet-Based Sediment Remediation On Benthic Organisms, Grace Harper, Andrew Curtis Elmore, Christopher Redell, Gavin Risley, Joel Gerard Burken
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Adding Activated Carbon to Sediments Has Been Shown to Be an Effective Means of Reducing the Bioavailability of Certain Contaminants. the Current State of the Practice is to Mechanically Mix Activated Carbon to a Target Concentration of 3 Percent at Depths of Approximately 30 Cm using a Rotovator or Similar Construction Equipment. Waterjets Have Been Used to Cut Hard Material using a Mixture of Water and an Abrasive. If Activated Carbon is Substituted for the Abrasive, Waterjets Have the Potential to Use Surface Injection as a Replacement for Mechanical Mixing during Sediment Remediation. a Perceived Benefit of Waterjet-Based Sediment Remediation …
Development Of A Waterjet System For Direct Delivery Of Granular Iron And Activated Carbon To Remediate Contaminated Aqueous Sediments, Gavin H.R. Risley, Andrew Curtis Elmore, Joel Gerard Burken, Grzegorz (Greg) Galecki
Development Of A Waterjet System For Direct Delivery Of Granular Iron And Activated Carbon To Remediate Contaminated Aqueous Sediments, Gavin H.R. Risley, Andrew Curtis Elmore, Joel Gerard Burken, Grzegorz (Greg) Galecki
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
While the Techniques and Technologies Associated with Contaminated Sediment Remediation Are Relatively Mature, There Are Several Issues Associated with These Practices that Make Them Unattractive. the Inability of Currently Used Mechanical Mixing Implements to Place Amendments in Aqueous Environments and their Intrusive Behavior toward Benthic Communities Are Just Two Examples of a Necessity for an Improved Delivery Method. Waterjets May Be a Viable Option for Placement of Particulate Remediation Amendments, Such as Activated Carbon and Granular Iron, at Depth. a Custom Waterjet Nozzle and Injection System Has Been Fabricated by the Authors to Examine This Delivery Concept. the Developed Injection …
A Financial Impact Assessment Of Ld 1725: Stream Crossings Presentation, New England Environmental Finance Center
A Financial Impact Assessment Of Ld 1725: Stream Crossings Presentation, New England Environmental Finance Center
Economics and Finance
This report looks at the potential financial impact of LD 1725 on the estimated 30,000 stream crossings in the State of Maine that would be affected by the law. Our research for this report included the analysis of nearly 2000 stream crossings and the data collection necessary for the development of extensive stream crossing replacement cost models. We found that the 1.2 bankfull requirements in LD 1725 would result in a 75% ‐ 250% increase in structure widths for stream crossing projects across the state. An upsize of this magnitude would increase the cost of replacing stream crossings statewide by …