Architecture Commons^™

Acoustic Communication In Panthera Tigris: A Study Of Tiger Vocalization And Auditory Receptivity, Edward J. Walsh, Lily M. Wang, Douglas L. Armstrong, Thomas Curro, Lee G. Simmons, Joann Mcgee

Lily M Wang

To adults and children alike, tigers are one of the best-known members of the animal kingdom. It may be surprising, then, to learn that we have a lot to discover about their hearing and the acoustics of their vocalizations. To help fill in the gaps in our knowledge, we are in the midst of a study that is focused on the characterization of the vocal properties and hearing capabilities of a subset of surviving tiger subspecies, namely the Siberian, Bengal, Sumatran and the Indochinese tigers. We are hoping that our findings will not only add to a deeper understanding of …

Acoustic Radiation From Bowed Violins, Lily M. Wang, Courtney B. Burroughs

Lily M Wang

Nearfield acoustic holography (NAH) is applied to visualize the acoustic radiation from bowed violins across a frequency range from 294 Hz to 3 kHz. These visualizations are employed to localize regions of acoustic radiation from surfaces of violins. Three violins were tested: a common student instrument by Scherl and Roth; Hutchins violin SUS295, which has been the subject of many previous investigations; and a Hutchins mezzo violin from the Violin Octet set of instruments, which is longer, broader and thinner than a standard instrument. The violins were bowed continuously with an open-frame mechanical bowing machine, while NAH measurements were made …

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

Lily M Wang

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-10-019: Human Performance And Perception-Based Evaluations Of Indoor Noise Criteria For Rating Mechanical System Noise With Time-Varying Fluctuations (1322-Rp), Lily M. Wang, Cathleen C. Novak

Lily M Wang

The goal of this study was to investigate the effects of noise from building mechanical systems with time-varying fluctuations on human task performance and perception, and to determine how well current indoor noise rating methods account for this performance and perception. Six different noise conditions with varying degrees of time-varying fluctuations, many focused in the low frequency rumble region, were reproduced in an office-like setting. Thirty participants were asked to complete typing, grammatical reasoning, and math tasks plus subjective questionnaires, while being exposed for approximately one hour to each noise condition. Results show that the noise conditions with higher sound …

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

Lily M Wang

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 noise from building ventilation systems. After a one-hour adaptation period at each condition, subjects rated their thermal comfort using the ASHRAE Thermal Comfort Scale and the Tenant …

A Review Of Diffuse Reflections In Architectural Acoustics, Jonathan Rathsam, Lily M. Wang

Lily M Wang

Diffuse reflections have received increasing attention in architectural acoustics over the past quarter century. The term diffuse refers to non-specular directions. This paper identifies three mechanisms that cause diffuse reflections. Practitioners have found that changing specular reflections into diffuse reflections can reduce noise and echoes both indoors and outdoors. Developers of acoustical modeling software have also found that modeling diffuse in additional to specular reflections produces more accurate predictions. The final portion of this paper presents results for a study of scattering coefficients in acoustical modeling software.

Appropriate Characterization Of Background Noise Levels In The Workplace, Erica E. Bowden, Lily M. Wang

Lily M Wang

Overall loudness is not the only quality of indoor background noise that affects occupants. The distribution of noise across frequency (pitch), whether or not the noise contains tones, and whether or not the noise changes over time must also be considered. There are several indoor noise criteria systems available to quantify the background noise in rooms, but many of them do not account for these factors. These systems are commonly used by architects and engineers, and often incorporated into manufacturer’s data, design guides, and standards. There is much debate over which of the criteria systems best reflect how occupants will …

Lv-11-C031: Measured Levels Of Hospital Noise Before, During, And After Renovation Of A Hospital Wing, And A Survey Of Resulting Patient Perception, Cassandra H. Wiese, Lily M. Wang

Lily M Wang

Acoustic conditions in hospitals can negatively influence a patient’s physical and psychological health. This paperreports on noise levels measured before, during, and after renovation of a hospital wing in an Omaha, Nebraska, facility thatregularly receives unsatisfactory noise scores on patient satisfaction surveys. Sound pressure levels were logged every 10seconds over four-day periods in three different locations: at the nurses' station, in the hallway, and in a nearby patient’sroom. The resulting data have been analyzed in terms of A-weighted equivalent sound levels (LAeq) as well as variousexceedance levels (Ln). Results indicate that sound levels did not change much due to the …

Measuring Sound Power In Ducted Heating, Ventilating, And Air-Conditioning (Hvac) Systems For Use In Verifying Acoustical Prediction Methods, Steven R. Ryherd, Lily M. Wang

Lily M Wang

This paper discusses issues regarding in-situ methods of obtaining sound power at a point in a heating, ventilating and air-conditioning (HVAC) duct system. Such a method is being used as part of a larger investigation on acoustical prediction methods to allow for comparison of measured data to results from attenuation predictions of individual duct elements, such as elbows or dampers. Sound propagation in HVAC duct work is complex. Any measurements of sound energy in the duct must address the characteristics of sound propagation in ducts, end reflections, and air turbulence. Investigations are being conducted to understand the extents to which …

Room Acoustics Computer Modeling: Study Of The Effect Of Source Directivity On Auralizations, Michelle C Vigeant, Lily M. Wang, Jens Holger Rindel

Lily M Wang

Auralizations are very useful in the design of performing arts spaces, where auralization is the process of rendering audible the sound field in a space, in such a way as to simulate the binaural listening experience at a given position in the modeled space. One of the fundamental modeling inputs to create auralizations is the source directivity. Standard methods involve inputting the measured source directivity, calculating the impulse response and convolving it with a single channel anechoic recording. An initial study was conducted using this method and the results showed significant differences in reverberation time and clarity index when using …

Objective And Subjective Evaluation Of The Use Of Directional Sound Sources In Auralizations, Lily M. Wang, Michelle C Vigeant

Lily M Wang

Omni-directional sources are often used in room acoustic computer simulations, as opposed to directional sources, since measured directivity data are quite limited and difficult to obtain. The purpose of this study is to investigate the objective and subjective significance of adding more complex directivity to the sources used in computer simulations and auralizations. A simple hall was used as the modelled space in the software program ODEON. Three source positions on stage and three receiver audience positions were chosen. Impulse responses (IRs) were calculated for the nine source/receiver combinations, using (a) an omni-directional source, (b) a highly directional source beaming …

Implications Of Human Performance And Perception Under Tonal Noise Conditions On Indoor Noise Criteria, Lily M. Wang, Erica E. Ryherd

Lily M Wang

This research investigated differences in task performance and perception under six non-time-varying ventilation-type background noise spectra with differing tonality. The results were related to five indoor noise criteria systems: Noise Criteria (NC), Balanced Noise Criteria (NCB), Room Criteria (RC), Room Criteria Mark II (RC-Mark II), and the A-weighted equivalent sound pressure level (LAeq). These criteria systems are commonly used in the U.S. building industry, but concerns exist over whether they are appropriate for all noise situations. Thirty test subjects completed three types of performance tasks (typing, reasoning, and math) and answered questions about their perception of the indoor environment under …

Industry Participation In The Interdisciplinary Team Design Project Course Of A Master Of Architectural Engineering Program, Lauren M. Ronsse, Lily M. Wang, Clarence E. Waters

Lily M Wang

This is a case study of extensive industry participation in the capstone design course of the Master of Architectural Engineering program at the University of Nebraska – Lincoln. This course, entitled Interdisciplinary Team Design Project, pairs teams of professional engineers and students to provide mentoring, assessment, and feedback, as the students work on interdisciplinary teams to design the building systems for a real-world project. For the spring 2010 semester, over 33 industry professionals participated in the course, each contributing approximately 40 to 50 hours of mentoring and assessment. This paper describes the course format and industry involvement, which provides students …

Relationships Between Unoccupied Classroom Acoustical Conditions And Elementary Student Achievement Measured In Eastern Nebraska, Lauren M Ronsse, Lily M. Wang

Lily M Wang

Building standards recommend maximum background noise levels (BNL) and reverberation times (RT) for unoccupied classrooms. However, existing research does not show a consistent correlation between these parameters and student achievement. Through in situ testing, this research seeks to determine what acoustical conditions should be attained in elementary schools for students to meet educational goals. Acoustical measurements were conducted in a Nebraska public school system and correlated to achievement scores from students in the surveyed classrooms. Unoccupied BNLs and RTs were gathered in 34 third and 33 fifth-grade classrooms. Additionally, binaural room impulse response measurements were gathered in a subset of …

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

Lily M Wang

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 …

Daily Border Crossings: Negotiations Of Gender, Body And Subjectivity In The Lives Of Women Workers In Urban Malls., Rachana Johri Dr., Krishna Menon Dr.

Cultural Encounters, Conflicts, and Resolutions

The last two decades have seen the emergence of not just new markets but new market spaces that provide a visual experience of products and persons that closely approximates the field set up by the global media. Malls represent the concrete representations of unabashed celebration and acknowledgment of desire. Malls are one of the spaces that shape everyday lives suggesting the rightfulness of fulfilling sexual, cultural, social and gastronomic desires. One ‘category’ of persons presumably shaped by these spaces are those who work in them. Our concern is particularly with the negotiation of body and subjectivity as women travel daily, …

Participation, Information, Values, And Community Interests Within Health Impact Assessments, Nicole Iroz-Elardo

Dissertations and Theses

Health impact assessment (HIA) has emerged in the U.S. as one promising process to increase social and environmental justice through addressing health equity issues within planning. HIA practice is guided by values such as democracy and equity and grounded in broad social determinants of health. The most readily applied definition of democracy is problematic because it implies an element of direct, participatory engagement with the public. This is at odds with HIA practice that largely relies on stakeholder engagement strategies.

This dissertation critically examines the engagement strategies of three transportation planning HIA cases to more fully understand how the HIA …

Supporting Active And Healthy Living In Master-Planned Communities: A Case Study, Bhishna Bajracharya, Linda Too, Isara Khanjanasthiti

Linda Too

Current research suggests a link between urban design and healthy and active lifestyles. As such, there is a growing emphasis within new master-planned communities to create supportive environments for physical activities. In South-East Queensland such developments provide a range of community facilities and regularly organise events to promote active and healthy living. In the light of this new direction in urban development, the objective of the paper is to examine the role of master-planned communities in supporting active and healthy living, using a case study approach. Based on critical analysis of literature, the paper first proposes a conceptual framework for …

Supporting Active And Healthy Living In Master-Planned Communities: A Case Study, Bhishna Bajracharya, Linda Too, Isara Khanjanasthiti

Bhishna Bajracharya

Current research suggests a link between urban design and healthy and active lifestyles. As such, there is a growing emphasis within new master-planned communities to create supportive environments for physical activities. In South-East Queensland such developments provide a range of community facilities and regularly organise events to promote active and healthy living. In the light of this new direction in urban development, the objective of the paper is to examine the role of master-planned communities in supporting active and healthy living, using a case study approach. Based on critical analysis of literature, the paper first proposes a conceptual framework for …

Challenges And Opportunities To Develop A Smart City: A Case Study Of Gold Coast, Australia, Bhishna Bajracharya, David Cattell, Isara Khanjanasthiti

Bhishna Bajracharya

With the rapid growth of information and communication technologies, there is a growing interest in developing smart cities with a focus on the knowledge economy, use of sensors and mobile technologies to plan and manage cities. The proponents argue that these emerging technologies have potential application in efficiently managing the environment and infrastructure, promoting economic development and actively engaging the public, thus contributing to building safe, healthy, sustainable and resilient cities. However, are there other important elements in addition to technologies which can contribute to the creation of smart cities? What are some of the challenges and opportunities for developing …

Theorising The ‘Fifth Migration’ In The United States: Understanding Lifestyle Migration From An Integrated Approach, Brian Hoey

Brian A. Hoey, Ph.D.

This chapter is an empirically-informed discussion of relevant social theory for examining the phenomenon of lifestyle migration in the United States in both rural and urban settings. Specifically, the chapter explores key explanatory models born of research into so-called non-economic migration occurring since the early twentieth century—models that may be characterized as primarily either production or consumption oriented in their emphasis—as a context for outlining an integrated approach. The author then highlights changes in how some Americans appear to calculate personal and collective quality of life as engendered by an emerging economic order—based on principles of flexibility and contingency—whose affects …

Where To Park? The East Campus Dilemma, Matthew Lewis

James Madison Undergraduate Research Journal (JMURJ)

James Madison University's East Campus expansion has created parking problems. Student struggle to find a decent parking spot, sacrificing time to park and then perhaps more time to walk to class. This research project seeks answers to the parking problems on the east side of campus, specifically the Festival and Convocation lots. Should students spend time navigating the Festival lot looking for a spot or should they go directly to the Convocation lot? The data and research explain why the latter solution is much more efficient.

From Berlin To Broadacres: Central European Influence On American Visionary Urbanism, 1910-1935, Margaret Herman

Dissertations, Theses, and Capstone Projects

In the 1920s and 1930s, Eliel Saarinen, Richard Neutra, and Frank Lloyd Wright each designed plans for real and imagined American cities. Saarinen's Chicago and Detroit plans of 1923-1924, Neutra's Rush City Reformed of 1926, and Wright's Broadacre City of 1935 are stylistically unique but all contain a similar fascination with hypothetical transportation networks and high-speed expansion that reflect a common relationship to the development of urban planning as a discrete field in Berlin and Vienna around 1910.

This dissertation will highlight several features of turn-of-the-century Central European planning that played an outsize role in the development of these visionary …

Vision For Embarcadero North, Morro Bay, California, Crp 553 Project Planning Lab

CRP 553 Project Planning Laboratory

No abstract provided.

Draft Environmental Impact Report: City Of Clearlake General Plan Update, Hannah Cha

Master's Theses

The City of Clearlake in northern California initiated its first general plan update in 2012.The City decided to do an Environmental Impact Report (EIR) for the general plan update in order to fulfill the California Environmental Quality Act’s (CEQA) requirements.The author wrote the Agriculture and Biological Resources sections of the EIR.She explains the CEQA process for a programmatic-level EIR, and summarizes the lessons learned and recommendations for CEQA.

General CEQA issues include fear of litigation and vague requirements for thresholds of significance.Additional CEQA issues include difficulty applying the same level of analysis to programmatic projects when the Environmental Checklist is …

Mapping And Analyzing Historical Sanborn Maps Of San Luis Obispo From 1905 And 1950, Troy A. Lawson

Social Sciences

This project was conducted to map, analyze, and determine historical changes in the city of San Luis Obispo, California. Sanborn maps from 1905 and 1950 were drawn showing streets, parcels, creeks, and buildings of the city. These publications had limited use because they were in a physical format without any geographic reference. Here, these maps were digitized into a GIS format to analyze building trends and identify cultural and historical buildings not on the City’s list of Historic and Culturally Contributing Buildings, as well as published online on the City of San Luis Obispo’s website and on ArcGIS Online. Additionally, …

Using Green Building To Mitigate Climate Change In The Twenty-First Century, Lisa Battiste

Honors Theses

The need for green buildings are rapidly becoming more important as the nation faces impending energy crises and the world heats up from the overabundance of greenhouse gases. Buildings in America are one of the largest consumers of energy and one of the greatest contributors to CO2 emissions; more than the total emissions from all the transportation vehicles used every day. By making the construction and use of buildings more resource efficient, this can help alleviate the environmental strain of climate change. Neutralizing or eliminating carbon emissions from building use will significantly reduce the amount of greenhouse gases in the …

A Test Of Simple Ledges For Facilitating Mammal Passage Through Inundated Culverts, Amy Kelley

Honors Theses

Culverts under roadways can provide safe crossings for many animal species and are readily available, numbering over 12 million in the United States. In this pre and post construction study, I added a simple wooden ledge to 7 culverts in Saratoga County, New York to investigate their effect on wildlife crossings. A motion sensor camera was used to monitor each culvert for 2 consecutive summers, 2012 summer without a ledge and 2013 with a ledge. Six species of small mammals accounted for the 55 culvert crossings in 2012 and 58 crossings in 2013. The ledges did not increase culvert crossings …

Water Recycling In Green Buildings: Grey Water Treatment And Reuse Benefits In Al-Wagan Residential Neighborhood In Al-Ain City, Al Dehaim Nassib Suhail Yatba Al Ameri

Theses

Water scarcity is a worldwide problem that called for a wiser and more sustainable resources' management. Grey waste water treatment is considered a widely spread technology that dominates water management in order to substitute the potential deficiencies.

Water use in the last three decades in the UAE has witnessed both a great increase and pressure on groundwater and desalinated water. This consequently has called for continuous, serious and diversified efforts to simultaneously improve the supply and sustain the water use by treatment and recycling. Besides UAE's natural population growth, the demand for water is also expected to increase significantly in …

Multi-Criteria Decision Modeling For Best Value Selections In Target Value Design Integrated Project Delivery, Brent Patrick Griffis

Master's Theses

Integrated Project Delivery (IPD) combined with Target Value Design (TVD) is a better way to deliver value for the client than traditional guaranteed maximum price (GMP) methods. With traditional GMP delivery methods, the interests of the parties are often at odds. The goal of IPD is to align all party interests in order to achieve a win-win scenario. Due to the aligning nature of IPD and the fact that each party’s success is dependent on achieving the project objectives as a whole; a non-biased, transparent, decision-making process is necessary in order to deliver the project objectives within the constraints of …