Architecture Commons^™

Diapycnal Diffusivities In Homogeneous Stratified Turbulence, D. D. Stretch, S. K. Venayagamoorthy

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Quantifying diapycnal mixing in stably stratified turbulence is fundamental to the understanding and modeling of geophysical flows. Data of diapycnal mixing from direct numerical simulations of homogeneous stratified turbulence and from grid turbulence experiments, are analyzed to investigate the scaling of the diapycnal diffusivity. In these homogeneous flows the instantaneous diapycnal diffusivity is given exactly by Kd= ∈ρ/ (∂ ρ /∂z)²where ∈ρ is the dissipation rate of density fluctuations, and ∂ ρ /∂z is the mean density gradient. The diffusivity Kd may be expressed in terms of the large-scale properties of the turbulence as K d = γLE …

Edra 41: Bibliography Of Books On Display, Kathleen Demsky

Bibliographies

edra 41 | Policy & The Environment | Washington, DC

Optimum Absorption And Aperture Parameters For Realistic Coupled Volume Spaces Determined From Computational Analysis And Subjective Testing Results, David T. Bradley, Lily M. Wang

Durham School of Architectural Engineering and Construction: Faculty Publications

This project utilizes computational modeling to study the effects of varying two architectural parameters, absorption ratio and aperture size, in a realistic coupled volume concert hall. Coupled volumes have been shown to exhibit non-exponential sound energy decay profiles, referred to as double slope effect. A number of objective metrics (T30/T15, LDT/T10, decay ratio, and ΔL) have been used to quantify the double slope effect of the profiles generated in the virtual hall. T30/T15 and LDT/T10 showed similar trends across all hall configurations, indicating decreasing double slope effect with increasing coupled volume absorption ratio for each aperture size, and producing highest …

Computational Modeling Of Effects Of Alloying Elements On Elastic Coefficients, Z. K. Liu, H. Zhang, S. Ganeshan, Y. Wang, S. N. Mathaudhu

Durham School of Architectural Engineering and Construction: Faculty Publications

Models for composition and temperature dependencies of single-crystal elastic stiffness coefficients are developed and applied to the Al₁₂Mg₁₇ and hexagonal closed-packed solution phases in the Mg–Al system based on data from first-principles calculations. In combination with models for multi-phases, the bulk, shear, and Young’s moduli of Mg–Al alloys are predicted and compared with available experimental data in the literature. It is noted that both phase transition and grain boundary sliding may play important roles in the elastic coefficients as a function of temperature.

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

Durham School of Architectural Engineering and Construction: 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 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 …

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

Durham School of Architectural Engineering and Construction: Faculty Publications

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 …

The Basilica Of St. Vincent Depaul: Architecture Of The Catholic Renouveau In Paris, Simone Zurawski, Michael Kiene

DePaul Art Museum Publications

No abstract provided.

Adaptive Housing: Transformation And Growth In The Urban Environment, Kevin Mowatt

Architecture Theses and Projects

The proposal for an adaptive housing project and its chosen location arose from two obstacles that all modern cities and the world as a whole, face. The urban environment is revered for its cultural amalgam of people and wide range of demographics; however with this density and diversity comes a shortage of one type or another of commodious housing. Additionally and consequentially, the city must expand and build new buildings, leaving older, unsuitable building vacant. An adaptive architecture would allow families to grow and demographics to shift within the established community, all the while reinvigorating that second obstacle the city …

Creating Community: Mixed Use Development In New Bedford, Ma, Matthew J.B. Cate

Architecture Theses and Projects

In creating a new type of community for New Bedford, MA, there was an awareness of both the existing community, context, and people, while realizing a need for change. The design uses the concept of adapting the existing density into two modes. First, merging the existing residential fabric and merging it with a public program including both commercial and retail development. Second, focusing that new typology into a smaller more refi ned space, while creating new public areas for communal enjoyment and development. Creating such an idea of living takes the existing unused exterior spaces allotted to the typical housing …

Community Infrastructure: A Transformation Of The New Orleans Industrial Canal, Nicholas Thornton

Architecture Theses and Projects

The city of New Orleans is in need of a symbol of stability and hope. The design proposal is for a New Orleans Water Treatment Facility that focuses on purification, reclamation and desalination processes. The facility will create a pure water supply that will be distributed into public circulation as well as be made readily available during natural disasters. A public works building such as this is important to the growth of the ever rebuilding city. In 2005, New Orleans was hit by Hurricane Katrina causing flooding and destruction to a great majority of the city. Once the hurricane subsided …

Rising Architecture, Erica M. Wiggin

Architecture Theses and Projects

Many cities have experienced shrinkage in their city centers, leaving behind abandoned lots and buildings throughout the city streets. The historic city of Providence was split after the construction of I-95, leaving the west side of the city separated and in some cases abandoned from downtown. Creating a couple living communities that work together to live sustainably by producing necessities such as electricity, clean water, food and medicine will be contributing to the quality of the city as well as improving their lives by learning, developing and teaching new means of living to the rest of the community in their …

Redefining The Rural Experience: Change For The People Of The Appalachian Mountains, Magoffin County Crafts, Social, And Health Services Center Gifford, Kentucky, Katelyn Chapin

Architecture Theses and Projects

As an introductory attempt to develop improvements within economically challenged Magoffin County, Kentucky, and explore the relationship of program to an individual’s life, craft, social, and health initiatives would be introduced to the residents. A community would evolve where locals could receive education, have access to daycare, purchase food at discount prices, engage in indigenous craft making, and visit professional doctors in the health clinic and urgent care center. Done in order to facilitate individual advancement and community growth, this design will support social integration by allowing people to share the resources needed to end the problem of generational and …

Contradiction And Duality Within The City: The House Of Arts And Culture, Andrei Sdrula

Architecture Theses and Projects

This project aims to apply the concepts of contradiction and duality as described in the manifesto to reinvigorate and reconnect a portion of the city Bucharest: the capital of Romania. This city has a long history of architectural achievements and disasters, and this intervention gets to the heart of that legacy when it confronts the House of Parliament: a massive megalomaniacal building constructed under the Ceausescu regime in the 1980s. The project addresses the parliament, sector, city, country, and people with first: a master plan, and then a civic building within that master plan that is located in front of …

Urban [Boxscape], Brad W. Bolte

Architecture Theses and Projects

Urban [BOXSCAPE] is a method of developing upon the existing Big Box Landscape in order to synthesize commercial, environmental, and social components of civic life into an integrated solution. This urban concept is demonstrated through a design vision for a Big Box Center in Seekonk, Massachusetts. However, the guidelines and options used in this exercise are meant to exceed this site’s immediate relevance and provide a model approach for similar sites across the nation.

Concrete Slender Wall Design – Back To The Future, John W. Lawson, James Lai

Architectural Engineering

Slender concrete walls incorporated into tilt-up construction
over the past 60 years have performed remarkably well under
out-of-plane wind and seismic loads. While issues associated
with seismic wall anchorage gave this form of construction a
black-eye in the early days, the concrete walls themselves
have always performed very well even as far back as their
first use in the early 1900s. Yet the height-to-thickness
limitations in 1985 and earlier model building codes were
proved irrational and were removed. We as engineers expect
building codes to evolve and advance the state of the art with
each successive edition. The latest edition …

El Paso, Texas, And Ciudad Juarez, Chihuahua, 1880-1930: A Material Culture Study Of Borderlands Interdependency, Gladys Arlene Hodges

Open Access Theses & Dissertations

ABSTRACT

Material culture theory informs this study of urban history and borderlands interdependency at El Paso, Texas, and Ciudad Juárez, Chihuahua, Mexico, from 1880-1930. Features incised into and structures built onto the natural environment by the first arriving colonists after the mid-seventeenth century endured for more than two centuries. Over that period, the humanly-created material environment, a social product, fed back into the development of social forms--institutions, rituals, practices, modes of interaction, activities, and beliefs. A significant number of these social forms endured into the late nineteenth century and beyond, even after mechanization and industrialization arrived in the region known …

Assessment Formats: Student Preferences And Perceptions, Mairéad Seymour, Shannon Chance

Articles

This paper provides a student perspective on the variety of forms of design critique available to educators. In architecture and landscape architecture, the design jury remains the dominant format for providing feedback to students. In recent years this format has come under scrutiny and its effectiveness called into question. However, little research has been done into the variety of alternative or supplemental formats available to educators. This paper explores an array of techniques that the authors have employed in design studio courses (which include techniques suggested by students in Webster’s 2007 article in the Journal of Architectural Education). These include …

Modeling Permanent Deformation Of Unbound Granular Materials Under Repeated Loads, Cheng Chen, Louis Ge, Jiansheng Zhang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Finite-element analysis on a pavement structure under traffic loads has been a viable option for researchers and designers in highway pavement design and analysis. Most of the constitutive drivers used were nonlinear elastic models defined by empirical resilient modulus equations. Few isotropic/kinematic hardening elastoplastic models were used but applying thousands of repeated load cycles became computationally expensive. in this paper, a cyclic plasticity model based on fuzzy plasticity theory is presented to model the long-term behavior of unbound granular materials under repeated loads. the discussion focuses on the model parameters that control long-term behavior such as elastic shakedown. the performance …

B S News January/February

Building Services Engineering

No abstract provided.

Writing Architecture: The Role Of Process Journals In Architectural Education., Shannon Chance

Conference papers

No abstract provided.