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1,134 full-text articles. Page 46 of 46.

Ab-10-C037: Effects Of Noise From Building Mechanical Systems On Elementary School Student Achievement, Lauren M. Ronsse, Lily M. Wang 2010 University of Nebraska - Lincoln

Ab-10-C037: Effects Of Noise From Building Mechanical Systems On Elementary School Student Achievement, Lauren M. Ronsse, Lily M. Wang

Architectural Engineering -- Faculty Publications

This project seeks to determine what relationship, if any, exists betweenbackground noise levels in elementary classrooms due to the building mechanicalsystems and student performance on achievement tests. Previous research inclassroom acoustics has clearly identified that lower background noise levelsresult in higher speech intelligibility which is crucial for the learning process;however, there is a lack of data correlating lower noise levels to improved studentachievement scores. For this study, background noise level measurements were madein 14 elementary schools in a public school system in Council Bluffs, Iowa, USA.The measurements were made in unoccupied classrooms with the central buildingmechanical systems activated ...


Active Noise Barrier Minimizing Pressure Gradient, Carl Hart, Siu-Kit Lau 2010 University of Nebraska-Lincoln

Active Noise Barrier Minimizing Pressure Gradient, Carl Hart, Siu-Kit Lau

Architectural Engineering -- Faculty Publications

Minimization of the sound pressure field within the shadow zone of a noise barrier is achieved by reducing the pressure gradient along a line, at the top of a barrier, via active noise control. The noise control effectiveness of a barrier is increased by this strategy, especially for specific system configurations. The proposed method was evaluated by numerical simulation. Results indicate that system orientation has little effect on minimizing the pressure gradient at the top of the barrier when the error sensors are invisible to the primary noise disturbance. Highly effective control within the shadow zone and close to the ...


Noise Propagation Through Open Windows Of Finite Depth Into An Enclosure, Caleb Sieck, Siu-Kit Lau 2010 University of Nebraska-Lincoln

Noise Propagation Through Open Windows Of Finite Depth Into An Enclosure, Caleb Sieck, Siu-Kit Lau

Architectural Engineering -- Faculty Publications

Predicting the insertion loss of an opening backed with an enclosed space is important for building noise control. Recent research in sound transmission through apertures of finite depth in infinite rigid baffles has included the effects of propagating and evanescent modes within the aperture in order to extend models to higher frequencies. The present study extends the model to the case of the aperture backed by a cavity as opposed to sound radiating into half-space. The role of coupling between the aperture modes, radiation modes, and cavity modes in the transmission was investigated. The results were compared to those of ...


Following Industry's Leed : Municipal Adoption Of Private Green Building Standards, Sarah B. Schindler 2010 University of Maine School of Law

Following Industry's Leed : Municipal Adoption Of Private Green Building Standards, Sarah B. Schindler

Faculty Publications

Local governments are beginning to require new, privately constructed and funded buildings to be “green” buildings. Instead of creating their own, locally-derived definitions of green buildings, many municipalities are adopting an existing private standard created by members of the building industry: LEED (Leadership in Energy and Environmental Design). This Article explains and assesses the privately promulgated LEED standards. It argues that the translation of LEED standards, which were intended to be voluntary, into law raises several theoretical and practical problems. Specifically, private green building ordinances that rely on LEED do not ensure a reduction in the negative local environmental impacts ...


Guide To Stones Used For Houses Of Worship In Northeastern Ohio, Joseph T. Hannibal 2010 Cleveland Museum of Natural History

Guide To Stones Used For Houses Of Worship In Northeastern Ohio, Joseph T. Hannibal

Cleveland Memory

The purpose of this guide is to serve as an introduction and field guide to the stone used for Northeastern Ohio’s sacred landmarks. compiling this information are noted. Both exterior and interior stones are described. Locations are given so that visitors can find various interior features. Finally, interesting facts having to do with the stones are given in a remarks section and references to sources used.


Feasibility Study Of Solar Driven Underground Cooling System, Michel E. Shafik 2010 University of Nebraska at Lincoln

Feasibility Study Of Solar Driven Underground Cooling System, Michel E. Shafik

Architectural Engineering -- Dissertations and Student Research

In the United States the peak electrical use occurs during the summer. In addition, the building sector consumes a major portion of the annual electrical energy consumption. One of the main energy consuming components in the building sector is the Heating, Ventilation, and Air-Conditioning (HVAC) systems. This research studies the feasibility of implementing a solar driven underground cooling system that could contribute to reducing building cooling loads. The developed system consists of an Earth-to-Air Heat Exchanger (EAHE) coupled with a solar chimney that provides a natural cool draft to the test facility building at the Solar Energy Research Test Facility ...


Disaster Rehabilitative Housing In India, Shehla Hussain 2010 University of Massachusetts Amherst

Disaster Rehabilitative Housing In India, Shehla Hussain

Masters Theses 1911 - February 2014

The project explores the design development of housing within the scenario of Post Disaster Rehabilitation of populations displaced by natural disasters. By looking at the house as a system that combines two distinct phases of rehabilitative housing, namely Transitional Housing and Durable Housing, the design seeks to reduce the complications of relocation every time there is a need to move on to the next phase of shelter aid.

To truly make the house construction an owner driven experience, the system aims to be designed such that it can manipulated by the owner/user to suit their long term needs and ...


Civic Center For Municipal Corporation Of Delhi, Akanksha Sharma 2010 University of Massachusetts Amherst

Civic Center For Municipal Corporation Of Delhi, Akanksha Sharma

Masters Theses 1911 - February 2014

The thesis project proposes to explore into the design possibilities for the Civic Center for Municipal Corporation of Delhi and extract the richness of the site conditions into architecture through means of computational design. The computational design approach will provide a degree of variance which will be an interesting thing to explore in terms of defining spaces, program and systems.. The design would hinge on to one of the major centers of Delhi and aim to enhance social permeability through means of forms and articulation of spaces. It would cater to all classes of people and help in promoting small ...


Ab-10-018: The Effects Of Noise From Building Mechanical Systems With Tonal Components On Human Performance And Perception (1322-Rp), Erica E. Ryherd, Lily M. Wang 2010 Georgia Institute of Technology

Ab-10-018: The Effects Of Noise From Building Mechanical Systems With Tonal Components On Human Performance And Perception (1322-Rp), Erica E. Ryherd, Lily M. Wang

Architectural Engineering -- Faculty Publications

This study investigated the effects of noise from building mechanical systems with tonal components on human task performance and perception. Six different noise conditions based on in-situ measurements were reproduced in an office-like setting; all were set to approximately the same sound level (47 dBA) but could have one particular tonal frequency (120 Hz, 235 Hz, or 595 Hz) at one of two tonal prominence ratios (5 or 9). Thirty participants were asked to complete typing, grammatical reasoning, and math tasks plus subjective questionnaires, while being exposed for approximately 1 hour to each noise condition. Results show that the noise ...


Ab-10-017: Combined Effects Of Noise And Temperature On Human Comfort And Performance (1128-Rp), Dale Tiller, Lily M. Wang, Amy Musser, Matthew Radik 2010 University of Nebraska-Lincoln

Ab-10-017: Combined Effects Of Noise And Temperature On Human Comfort And Performance (1128-Rp), Dale Tiller, Lily M. Wang, Amy Musser, Matthew Radik

Architectural Engineering -- Faculty Publications

This paper summarizes results from an experiment designed to investigate the combined effects of noise and temperature on human thermal comfort and task performance. Thirty subjects (16 females, 14 males) were exposed to all combinations of five thermal conditions (PMV +1 [79.6°F:26.4°C], PMV +0.5 [75.8°F:24.3°C], PMV 0 [72.1°F:22.3°C], PMV -0.5 [68.3°F:20.2°C], and PMV -1 [64.6°F:18.1°C]), three RC noise levels (RC-30, RC-40, and RC-50), and two sound qualities (neutral and rumbly): all sounds mimicked ...


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