Architectural Engineering Commons^™

Multi-Channel Orchestral Anechoic Recordings For Auralizations, Michelle C. Vigeant, Lily M. Wang, Jens Holger Rindel, Claus Lynge Christensen, Anders Christian Gade

Durham School of Architectural Engineering and Construction: Faculty Publications

Multi-channel orchestral anechoic recordings were obtained at the Technical University of Denmark (DTU) in June 2005. Every orchestral part of specific movements of two symphonies, Brahms’ Symphony No. 4, 3rd movement, and Mozart’s Symphony No. 40 in g minor, 1st movement, were digitally recorded using five 0.5” DPA microphones, with four surrounding the musicians in the horizontal plane and the fifth directly above. The recordings were made in DTU’s large anechoic chamber, which has free space of about 1000 m3 and a lower frequency limit of 50 Hz. Each musician was recorded individually, and to assist with overall synchronization of …

Examining The Relationships Between Monaural And Binaural Classroom Acoustics Parameters And Student Achievement, Lauren M. Ronsse, Lily M. Wang, Paul L. Sim

Durham School of Architectural Engineering and Construction: Faculty Publications

This study investigates the relationships between several classroom acoustics parameters and student achievement. Detailed binaural room impulse response measurements were conducted in four elementary school classrooms in a midwestern public school system in the United States. Unoccupied background noise levels were also recorded in these spaces. Previous studies have compared how different room acoustics metrics predict speech intelligibility, while another investigation examined perception-based binaural metrics in a typical classroom. This study extends these previous research areas by comparing both binaural classroom acoustics metrics and unoccupied background noise levels to each other and to the standardized student achievement scores of students …

Cyber-Physical Codesign Of Distributed Structural Health Monitoring With Wireless Sensor Networks, Gregory Hackmann, Weijun Guo, Guirong Yan, Chenyang Lu, Shirley Dyke

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Our Deteriorating Civil Infrastructure Faces the Critical Challenge of Long-Term Structural Health Monitoring for Damage Detection and Localization. in Contrast to Existing Research that Often Separates the Designs of Wireless Sensor Networks and Structural Engineering Algorithms, This Paper Proposes a Cyber-Physical Co-Design Approach to Structural Health Monitoring based on Wireless Sensor Networks. Our Approach Closely Integrates (1) Flexibility-Based Damage Localization Methods that Allow a Tradeoff between the Number of Sensors and the Resolution of Damage Localization, and (2) an Energy-Efficient, Multi-Level Computing Architecture Specifically Designed to Leverage the Multi-Resolution Feature of the Flexibility-Based Approach. the Proposed Approach Has Been Implemented …

Low Viscosity Pore Fluid To Manufacture Transparent Soil, Honghua Zhao, Louis Ge, Ronaldo Luna

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Transparent soil has been investigated for its potential as a substitute research media for natural soil. the mechanism for manufacturing the transparent soil is through adding an appropriate pore fluid to silica gel particles with the same refractive index. Two types of high viscosity pore fluids were identified by Iskander in 1994. However, because of the high viscosity of these two pore fluids, air was easily entrapped, which made the manufacture of a large mass of transparent soil difficult. in addition, the identified pore fluids caused serious membrane deterioration during triaxial laboratory testing. This research presented herein is an experimental …

Liquefaction Study Of Heterogeneous Sand: Centrifuge, Pradipta Chakrabortty, Radu Popescu, Ryan Phillips

Architectural Engineering

From past numerical research and small scale laboratory tests, it has been observed that more excess pore water pressure (EPWP) is generated during earthquakes in a heterogeneous sand deposit than in the corresponding homogeneous sand with relative density equal to the average relative density of the heterogeneous sand. This interesting phenomenon is investigated here in large scale experiments using geotechnical centrifuge modeling techniques. A series of liquefaction tests have been conducted at C-CORE’s geotechnical centrifuge facility: Two on variable sand and one on uniform sand deposits. A one level frame structure resting on two strip footings was also placed on …

Interdisciplinary Design: The Good, The Bad, And The Ugly, Jill Nelson, Brent Nuttall, Allen Estes

Architectural Engineering

Today’s students are faced with far different challenges upon graduation than those encountered in past years. One of the most significant of these challenges is the need to work within the framework of integrated project delivery where all disciplines work as a cohesive team to produce a project. In 2004, the Construction Management Department at California Polytechnic State University in San Luis Obispo,CA began teaching a three credit hour design/build course focused on integrated project delivery. That course, taught primarily to construction management students, has now evolved into a true interdisciplinary experience that is taught in a team environment by …

Exceed Ii: Advanced Training For Even Better Teaching, Debra Larson, Allen Estes, Norman Dennis, Ronald Welch, Carol Considine

Architectural Engineering

In 2007, the American Society of Civil Engineering’s Committee on Faculty Development (CFD) conducted a longitudinal survey of all the past participants of the ExCEEd Teaching Workshop (ETW). The CFD received 173 responses, representing 40% of the ETW population at that time, to its survey about skills and the long term value of ETW. Important to this paper, 73% of the survey respondents said that they were interested in attending a post, advanced ETW. Motivated by these survey results, the CFD began its planning for a pilot ExCEEd II workshop during the 2008-2009 academic year. In the summer of 2009, …

Gender Representation In Architectural Engineering - Is It All In The Name?, Pamalee Brady, Allen Estes

Architectural Engineering

Under-representation of women in engineering is of concern as the decreasing supply of qualified engineers continues to plague the nation’s advancement. Understanding what factors influence choices of engineering disciplines has the potential for altering education to accommodate a more diverse student body that can be successful in engineering. University statistics reflect that the Architectural Engineering program at this school is comprised of 35% women, while the other engineering programs attract at best 20% women and at worst 5% women. The Architectural Engineering program at this university is in fact one of the most intense structural engineering programs in the country …

Static And Fatigue Bond Characteristics Of Frp Rebars Embedded In Fiber-Reinforced Concrete, Huanzi Wang, Abdeldjelil Belarbi

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A research project was initiated to develop a nonferrous hybrid reinforcement system for concrete bridge decks by using continuous fiber-reinforced polymer (FRP) rebars and discrete randomly distributed polypropylene fibers. This hybrid system may eliminate problems related to the corrosion of steel reinforcement while providing requisite strength, stiffness, and desired ductility, which are shortcomings of FRP reinforcing system in plain concrete. This article presents the results of a part of this research program, i.e., the bond behaviors of this hybrid reinforcing system under monotonic and fatigue loading. Test results indicate that the addition of polypropylene fibers does not increase the ultimate …

Structural Damage Detection Robust Against Time Synchronization Errors, Guirong Yan, Shirley J. Dyke

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Structural Damage Detection based on Wireless Sensor Networks Can Be Affected Significantly by Time Synchronization Errors among Sensors. Precise Time Synchronization of Sensor Nodes Has Been Viewed as Crucial for Addressing This Issue. However, Precise Time Synchronization over a Long Period of Time is Often Impractical in Large Wireless Sensor Networks Due to Two Inherent Challenges. First, Time Synchronization Needs to Be Performed Periodically, Requiring Frequent Wireless Communication among Sensors at Significant Energy Cost. Second, Significant Time Synchronization Errors May Result from Node Failures Which Are Likely to Occur during Long-Term Deployment over Civil Infrastructures. in This Paper, a Damage …

Replacing Workplace Leadership With Political Expediency, Mark Daniel Leonhardt

Masters Theses & Specialist Projects

The study examines the adherence to principled leadership styles by persons in position of authority and develops a method to determine the extent to which those people deviate from principled leadership practices for purpose of political expediency. Two fortune 500 companies, three smaller local companies and select Western Kentucky University faculty were surveyed using the MACH V Attitude Inventory for determining Machiavellian tendencies via an online survey site. An examination and evaluation of survey results yielded a surpirsingly consistent neutral score, but no indication of Machiavellian tendencies within the respondent group.

Theatre For A New Theater: A Play On Architecture, Alexander Coulombe

Renée Crown University Honors Thesis Projects - All

Not Included

Activating Infrastructure, Joanna T. Myers

Renée Crown University Honors Thesis Projects - All

“The City Implant is an urban design project that can be used to strengthen an existing center or create a new one. It is a spatial and programmatic upgrade that gives an area the status of a center or increases the density of an existing center. Rather than intervening in undeveloped land, a City Implant should be a transformer of empty land and even under-exploited traffic junctions. A City Implant should describe the quality of centrality itself.” Alex Wall “Boomtown v. Regiocity: Thinking and designing or the Networked City Region.” (Almy, 286)

Transportation infrastructures across the United States create issues …

[Dis]Lodge; A Transformation Of The Ski Lodge In Response To Function And Site, Jacob E. Schneck

Renée Crown University Honors Thesis Projects - All

Over the past century skiing has experienced remarkable growth in popularity, equipment and technique. From 1946 to the present the number of ski resorts in North America with operating lifts has grown from 15 to over 600. During this time skiing has developed from a means of winter travel into a sport that combines paramilitary precision and control with leisure. Driven by economic interests and the superficial imitation of European alpine architecture the contemporary ski lodge model has failed to meaningfully address these changes and has failed to address function and context in terms of both its formal organization and …

Breaking The Mould 5 : Comparative Simulation Of Internal Insulation Systems, Joseph Little

Articles

In the last edition of Construct Ireland ‘Breaking the Mould IV’ established the standard that should be used to evaluate thermal upgrades of single leaf walls, described steps to physically prepare the wall, explained some of the mechanisms that affect the likelihood of mould and gave criteria for judging the simulations outputs. The next step is to simulate a number of permutations of typical internal insulation systems using WUFI Pro under IS EN 15026.

Effects Of Building Mechanical System Noise On Worker Performance And Perception, Lily M. Wang

Durham School of Architectural Engineering and Construction: Faculty Publications

This paper presents results from a number of studies that investigated the effects of noise from building mechanical systems on human task performance and perception.  Three phases of research were conducted, each of which utilized a different set of noise signals produced by building mechanical systems: (1) broadband noise at different levels and spectral qualities; (2) tonal noise conditions; and (3) noise conditions with time-varying fluctuations.  In each phase, at least six different noise signals (many based on in-situ measurements) were reproduced in an office-like setting.  Thirty participants completed tasks (e.g. typing, grammatical reasoning, math) plus subjective questionnaires, while exposed …

Investigation Of The Thermal Conductivity Of Compacted Silts And Its Correlation To The Elastic Modulus, Robert D. Hotz, Louis Ge

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Thermal conductivity measurement is a quick and easy test for compacted soils. This study presents the results of thermal conductivity testing on silt compacted under standard and modified Proctor efforts. a comparison of moisture content measurements from both lab oven and field oven is also presented and discussed. Measured thermal conductivity was correlated to the bulk density and water content. It is further correlated to Young's modulus and Shear modulus of the compacted silt, which were determined through ultrasonic pulse velocity measurements. Several trends were observed which may be used to correlate soil thermal conductivity of the compacted silt to …

Unlv Magazine, Cate Weeks, Tony Allen, Shane Bevell, Diane Russell, Brendan Buhler, Afsha Bawany, Erin O'Donnell

UNLV Magazine

No abstract provided.

How And What To Communicate For Efficient Joist Design, John Lawson, Bruce Brothersen

Architectural Engineering

No abstract provided.

On The Turbulent Prandtl Number In Homogeneous Stably Stratified Turbulence, Subhas K. Venayagamoorthy, Derek D. Stretch

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In this paper, we derive a general relationship for the turbulent Prandtl number Prt for homogeneous stably stratified turbulence from the turbulent kinetic energy and scalar variance equations. A formulation for the turbulent Prandtl number, Prt, is developed in terms of a mixing length scale LM and an overturning length scale LE, the ratio of the mechanical (turbulent kinetic energy) decay time scale TL to scalar decay time scale Tp and the gradient Richardson number Ri. We show that our formulation for Prt is appropriate even for non-stationary (developing) stratified flows, since it does not include the reversible contributions in …