Architecture Commons^™

Comparisons Of Horizontal-Axis Wind Turbine Wake Interaction Models, Jordan M. Wilson, Cole J. Davis, Subhas K. Venayagamoorthy, Paul R. Heyliger

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In this study, Reynolds-averaged Navier-Stokes (RANS) simulations are performed using the k-ϵ and k-ω shear stress transport (SST) turbulence closure schemes to investigate the interactions of horizontal-axis wind turbine (HAWT) models in the neutrally stratified atmospheric boundary layer (ABL). A comparative study of actuator disk, actuator line, and full rotor models of the National Renewable Energy Laboratory (NREL) 5 MW reference turbine is presented. The open-source computational fluid dynamics (CFD) code open foam 2.1.0 and the commercial software ANSYS fluent 13.0 are used for simulations. Single turbine models are analyzed for turbulent structures and wake resolution in the downstream region. …

The Formation And Fate Of Internal Waves In The South China Sea, Matthew H. Alford, Thomas Peacock, Jennifer A. Mackinnon, Jonathan D. Nash, Maarten C. Buijsman, Luca A. Centurioni, Shenn-Yu Chao, Ming-Huei Chang, David M. Farmer, Oliver B. Fringer, Ke-Hsien Fu, Patrick C. Gallacher, Hans C. Graber, Karl R. Helfrich, Steven M. Jachec, Christopher R. Jackson, Jody M. Klymak, Dong S. Ko, Sen Jan, T. M. Shaun Johnson, Sonya Legg, I-Huan Lee, Ren-Chih Lien, Matthew J. Mercier, James N. Mourn, Ruth Musgrave, Jae-Hun Park, Andrew I. Pickering, Robert Pinkel, Luc Rainville, Steven R. Ramp, Daniel L. Rudnick, Sutanu Sarkar, Alberto Scotti, Harper L. Simmons, Louis C. St. Laurent, Subhas Karan Venayagamoorthy, Yu-Huai Wang, Joe Wang, Ying J. Yang, Theresa Paluszkiewicz, Tswen-Yung David Tang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Internal gravity waves, the subsurface analogue of the familiar surface gravity waves that break on beaches, are ubiquitous in the ocean. Because of their strong vertical and horizontal currents, and the turbulent mixing caused by their breaking, they affect a panoply of ocean processes, such as the supply of nutrients for photosynthesis¹, sediment and pollutant transport² and acoustic transmission³; they also pose hazards for man-made structures in the ocean⁴. Generated primarily by the wind and the tides, internal waves can travel thousands of kilometers from their sources before breaking⁵, making it …

Representative Bureaucracy And The Indirect Effects Of Substantive Co-Worker Representation, Nita Clark

Planning Dissertations - Archive

The theory of representative bureaucracy has been suggested as an equity oriented tool that could work to alter the negative aspects of majority rule. Ongoing debates over the best way to ensure and enhance equity for underrepresented groups continue to question the value of representative bureaucracy as it has concentrated on passive (descriptive) and active representation. Such representation where administrators look like the clientele they are serving and subsequently work to generate outcomes for those clients certainly has value. However it is not a certainty that a bureaucrat sharing a similar traits as the group being served (passive representation) will …

Shared Trauma: A Phenomenological Investigation Of African American Teachers, Juanita Lynne White

Walden Dissertations and Doctoral Studies

In the wake of increasing community disasters such as hurricanes, neighborhood violence, and terrorist attacks, schools are usually deemed places where youth can find safety and stability. Research about community trauma related to the role of teachers and schools has predominantly focused on younger populations, concerned about disturbances in their developmental processes. School teachers' responsibilities related to these community disasters have also increased and now include supporting their traumatized students. However, there has been limited attention on the direct effect of community traumas on the teachers who work and live in affected districts. The construct of shared trauma describes this …

Efficient Management Of Cross-Cultural Manufacturing Teams In The Dominican Republic, Efrain Serrano

Walden Dissertations and Doctoral Studies

Companies that have moved their operations from the United States to other countries have forced top management to rely on their managers for leading overseas assignments. However, the success rate of expatriate managers is low and is a concern for top management in corporations. The purpose of this phenomenological study was to explore the shared lived experiences of 20 expatriate managers to identify methods which may improve the success rates of expatriate managers asked to participate in overseas assignments. Social learning, cultural shock, and experiential learning were used to support the conceptual framework linking how cross-cultural training, adaptation, problems, and …

Lighting Design In Europe: Aligning The Demands For Lower Energy Usage With Better Quality., Kevin Kelly, James Duff

Articles

Lighting design is one of the fastest changing areas in building engineering. It has evolved significantly in recent years due to changing technology and demands for improved quality, better control, reduced energy and sustainability. This paper is an overview of what is happening in Europe and elsewhere and examines the literature to find that latest recommendations in the Code for Lighting issued by the SLL (Society of Light and Lighting) in the UK change previous demands for equal illuminance across a working plane to more specific and demanding criteria. There are recommendations for qualitative metrics and better distribution of light …

An Examination Of The Desalination Process And Facility, Elizabeth M. Granger

City and Regional Planning

No abstract provided.

M.Sc. Sustainable Development Group Project On The Environmental Design And Management Of Darndale Park., Daniel Blanchfield, Andrea Culjak, Meadhbh Ní Lochlainn, Orla Gilleece, Lin Zhao, Niall Thomas, John Lucey, Zainab Mansary

Students Learning with Communities

No abstract provided.

Housing Regeneration Strategies - Dit Students' Projects For Waterford City, Ireland., Jim Roche, Orla O'Donnell, Jim Ward

Other resources

No abstract provided.

Assessing Risks In Insulation Retrofits Using Hygrothermal Software Tools, Joseph Little, Calina Ferrari, Beñat Arregi

Reports

The greatest difference between buildings of traditional and non-traditional construction design lies not so much in the building materials used, but in the way they are used to construct the external envelope of a building – in the way they are assembled. One may say that the defining approach of traditional construction is the management of moisture and, in contrast, one can say that modern construction systems generally (but not always) depend on blocking, not managing, moisture. The deterioration and decay that occurs in buildings almost always involves moisture. Three relevant moisture sources are identified in this report: indoor vapour, …

Bs News January/February

Building Services Engineering

No abstract provided.

Location Of The Corbels In The University Of Michigan Law Quadrangle, University Of Michigan Law School

About the Buildings

Diagram of the location of the corbels in the Cook Law Quadrangle.

Northside Partnership Healthy Communities Pilot Area Walkability Audit, Lin Zhao, Meadhbh Ní Lochlainn

Students Learning with Communities

No abstract provided.

Vibration Of Steel-Framed Floors Supporting Sensitive Equipment In Hospitals, Research Facilities, And Manufacturing Facilities, Di Liu

Theses and Dissertations--Civil Engineering

Floors have traditionally been designed only for strength and deflection serviceability. As technological advances have been made in medical, scientific and micro-electronics manufacturing, many types of equipment have become sensitive to vibration of the supporting floor. Thus, vibration serviceability has become a routinely evaluated limit state for floors supporting sensitive equipment. Equipment vibration tolerance limits are sometimes expressed as waveform peak acceleration, and are more often expressed as narrowband spectral acceleration, or one-third octave spectral velocity.

Current floor vibration prediction methods, such as those found in the American Institute of Steel Construction Design Guide 11, Floor Vibrations Due to Human …

Ellis County / Midlothian To Waxahachie Regional Trail Corridor Research, James Richards, Taner R. Özdil, Michael C. Walton, Nhasala Manandhar, Alexandra Tracz

Landscape Architecture Faculty Publications - Archive

The research project examines the alignment options and feasibility of constructing a regional shared-use path (trail) facility in Ellis County, Texas, linking the cities of Midlothian and Waxahachie and connecting to the larger Regional Veloweb (Dallas - Fort Worth's regional trail network) adopted by the Regional Transportation Council as part of the Metropolitan transportation plan. The project includes coordination with key stakeholders, examining existing conditions, community outreach, and preparation of alternative alignment options for public feedback. This report details the preliminary alternative alignments and the final recommended trail alignment for the regional shared-use path, a diagrammatic plan, and the extent …

Cfmd Research Journal 2015 Volume 4, Center For Metropolitan Density, Michael P. Buckley, Taner R. Ozdil, Kevin Sloan

Center for Metropolitan Density Publications - Archive

The Center's research efforts focus on best practices to develop multi component urban projects, such as this Journal's article on Public Private Partnerships, and on Designed Open Space to create value. Our scenarios are feasibility-tested with market support and achievement of investment returns. For cities, these scenarios are also sound fiscal contributors of the long term, and more valuable investments with better economic efficiency and environmental sustainability.

Maya Construction History: Explorations Through Buildings Archaeology And Conservation, Leah M. Mccurdy

Sociology & Anthropology Faculty Publications - Archive

No abstract provided.

Effect Of Fly Ash Replacement Level On The Bond Strength Of Reinforcing Steel In Concrete Beams, Mahdi Arezoumandi, Trevor J. Looney, Jeffery S. Volz

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study compares the bond strength of reinforcing steel in high-volume fly ash concrete (HVFAC) mixes. Three mixes with 0% (conventional concrete), 50%, and 70% replacement of Portland cement with a Class C fly ash investigated in this study. Three beams (simply supported four-point loading condition) as well as three pull-out specimens (based on RILEM recommendations) were tested for each mix. Test results evaluated based on different codes as well as a bond database of conventional concrete specimens. These comparisons indicate that with increasing replacement level of fly ash in concrete the bond strength of reinforcing steel in concrete increases. …

Universal Design Project St. Michael's House 1., Andrea Deac, Jamie Lyons, Jennifer Mcauley, Jennifer Olakitan

Students Learning with Communities

No abstract provided.

Shtëpi Banimi Individuale Ekologjike, Arianit Rexhepi

Theses and Dissertations

No abstract provided.

Optimalizimi I Planit Dinamik Për Objektin 2b+P+6 Në Prizren Duke Shfrytëzuar Planin Dinamik Të Fuqisë Punëtore - Histogramin, Egzona Morina-Thaqi

Theses and Dissertations

No abstract provided.

Procedural Modeling For Ancient Maya Cityscapes: Initial Methodological Challenges And Solutions, Heather Richards-Rissetto, Rachel Plessing

Department of Anthropology: Faculty Publications

Digital reconstruction of 3D cityscapes is expensive, time-consuming, and requires significant expertise. We need a 3D modeling approach that streamlines the integration of multiple data types in a time-efficient and low-cost manner. Procedural modeling—rapid proto-typing of 3D models from a set of rules— offers a potential solution to this problem because it allows scholars to create digital reconstructions that can be quickly updated and used to test and formulate alternative hypotheses that are derived from and linked to underlying archaeological data. While procedural modeling is being used to visualize ancient Roman, Etruscan, and Greek cities, in the Maya region the …

Accounting For The Short Term Substitution Effects Of Walking And Cycling In Sustainable Transportation, Daniel P. Piatkowski, Kevin J. Krizek, Susan L. Handy

Community and Regional Planning Program: Faculty Scholarly and Creative Activity

The environmental benefits of bicycling and walking depend on the degree to which their use substitutes for car driving. Assuming that every walking and bicycling trip replaces a driving trip is likely to produce overestimates of the potential for such modes to reduce vehicle travel and city-scale greenhouse gas emissions. Measuring this ‘‘substitution effect’’ is not straightforward. There are many dimensions of the substitution effect, including trip type, substituting mode, extent, time horizon, and activity patterns. Previously used approaches to measure substitution include indirect inference and direct questioning. This study piloted an intercept survey using the direct questioning approach at …

Evaluating The Vegetation Recovery In The Damage Area Of Wenchuan Earthquake Using Modis Data, Wei-Guo Jiang, Kai Jia, Jian-Jun Wu, Zhenghong Tang, Wen-Jie Wang, Xiao-Fu Liu

Community and Regional Planning Program: Faculty Scholarly and Creative Activity

The catastrophic 8.0 Richter magnitude earthquake that occurred on 12 May 2008 in Wenchuan, China caused extensive damage to vegetation due to widespread landslides and debris flows. In the past five years, the Chinese government has implemented a series of measures to restore the vegetation in the severely afflicted area. How is the vegetation recovering? It is necessary and important to evaluate the vegetation recovery effect in earthquake-stricken areas. Based on MODIS NDVI data from 2005 to 2013, the vegetation damage area was extracted by the quantified threshold detection method. The vegetation recovery rate after five years following the earthquake …

Ventilation Rates And Airflow Pathways In Patient Rooms: A Case Study Of Bioaerosol Containment And Removal, Ehsan S. Mousavi, Kevin R. Grosskopf

Durham School of Architectural Engineering and Construction: Faculty Publications

Most studies on the transmission of infectious airborne disease have focused on patient room air changes per hour (ACH) and how ACH provides pathogen dilution and removal. The logical but mostly unproven premise is that greater air change rates reduce the concentration of infectious particles and thus, the probability of airborne disease transmission. Recently, a growing body of research suggests pathways between pathogenic source (patient) and control (exhaust) may be the dominant environmental factor. While increases in airborne disease transmission have been associated with ventilation rates below 2 ACH, comparatively less data are available to quantify the benefits of higher …

Adaptive Predictive Functional Controller, Fadi Alsaleem, Arvind Rao

Durham School of Architectural Engineering and Construction: Faculty Publications

A controller device and a method for controlling a system that utilizes an adaptive mechanism to self-learn the system char acteristics and incorporates this adaptive self-learning ability to predict a control parameter correctly to provide precise control of a system component.

An Adaptive Photovoltaic Topology To Overcome Shading Effect In Pv Systems, Mohamed Amer Chaaban, Lana El Chaar, Mahmoud Alahmad

Durham School of Architectural Engineering and Construction: Faculty Publications

Shading in photovoltaic systems can cause many undesired effects.When shading occurs, the power generated from the PV system is much less than nominal power, increasing the electrical mismatching losses between PV system components. Active research to address this power loss focuses on static and adaptive systems.This paper addresses an adaptive system solution and proposes a new method to adaptively overcome losses due to shading during low radiation conditions. In addition, a statistical analysis for choosing the most feasible and efficient configuration for the system size is presented. The proposed system has been validated under shade conditions in a simulation and …

Building Envelope And Interior Grading Systems And Methods, Fadi Mohammad Alsaleem

Durham School of Architectural Engineering and Construction: Faculty Publications

A difference module determines differences between an out door ambient temperature and an indoor temperature, deter mines a first average of the differences, and determines a second average of the differences. A storing module stores a first data point, the first data point including the first average and a first total run time of a heating, ventilation, and/or air conditioning (HVAC) system, and stores a second data point, the second data point including the second average and a second total run time of the HVAC system. A fitting module fits a line to the first and second data points. An …

Successful Urban Design Principles For The Redevelopment Of The Historic Seafronts In The Kingdom Of Saudi Arabia, Along The North Red Sea , Case Study: Yanbu Al-Bahr’S Historic Seafront, Naif F. Alanazi

Theses and Dissertations

This thesis highlights the role of urban planners in the revitalization of historic

seafronts as creative and attractive places for people and a key factor in the

regeneration of the urban economy in the historic seafront areas. The Saudi Arabia

historic seafront areas along the North Red Sea have been neglected and are suffering

because of slow development and changes to industrial uses. This thesis will focus on

the urban design principles that make historic seafronts more attractive and

successful, and will use a case study approach of several American waterfront cities

such as Baltimore, Maryland; San Francisco, California; and …

Speed And Resolution In The Age Of Technological Reproducibility, Shawn Taylor

Theses and Dissertations

The rate of acceleration of the biologic and synthetic world has for a while now, been in the process of exponentially speeding up, maxing out servers and landfills, merging with each other, destroying each other. The last prehistoric relics on Earth are absorbing the same oxygen, carbon dioxide and electronic waves in our biosphere as us. A degraded .jpeg enlarged to full screen on a Samsung 4K UHD HU8550 Series Smart TV - 85” Class (84.5” diag.). Within this composite ecology, the ancient limestone of the grand canyon competes with the iMax movie of itself, the production of Mac pros, …