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Design And Optimization Of Membrane-Type Acoustic Metamaterials, Matthew G. Blevins 2016 University of Nebraska-Lincoln

Design And Optimization Of Membrane-Type Acoustic Metamaterials, Matthew G. Blevins

Architectural Engineering -- Dissertations and Student Research

One of the most common problems in noise control is the attenuation of low frequency noise. Typical solutions require barriers with high density and/or thickness. Membrane-type acoustic metamaterials are a novel type of engineered material capable of high low-frequency transmission loss despite their small thickness and light weight. These materials are ideally suited to applications with strict size and weight limitations such as aircraft, automobiles, and buildings. The transmission loss profile can be manipulated by changing the micro-level substructure, stacking multiple unit cells, or by creating multi-celled arrays. To date, analysis has focused primarily on experimental studies in plane-wave ...


Survey Of Restoration Efforts Following The 2015 Nepal Earthquake, Celine K. Nakachi 2016 University of San Francisco

Survey Of Restoration Efforts Following The 2015 Nepal Earthquake, Celine K. Nakachi

Creative Activity and Research Day - CARD

The purpose of this paper is to provide knowledge on the devastating 2015 Nepal earthquake, it's architectural failures and alternative construction methods with the use of various documentation such as video footage screenshots, photographs, and information from previous reports. It will offer alternative methods that can be proposed to those currently residing in Nepal for safer construction methods, styles and overall offer a sense of hope for those affected by the earthquake. The end goal is to inform others on Nepal's conditions and their inability to build lavishly, therefore also taking into account some of the local and ...


The Effects Of Tones In Noise On Human Annoyance And Performance, Joonhee Lee 2016 University of Nebraska - Lincoln

The Effects Of Tones In Noise On Human Annoyance And Performance, Joonhee Lee

Architectural Engineering -- Dissertations and Student Research

Building mechanical equipment often generates prominent tones because most systems include rotating parts like fans and pumps. These tonal noises can cause unpleasant user experiences in spaces and, in turn, lead to increased complaints by building occupants. Currently, architectural engineers can apply the noise criteria guidelines in standards or publications to achieve acceptable noise conditions for assorted types of spaces. However, these criteria do not apply well if the noise contains perceptible tones. The annoyance thresholds experienced by the general population with regards to the degree of tones in noise is a significant piece of knowledge that has not been ...


Getting La To Net Positive Competition For Innovation In Design, Alexander Lohr 2016 California Polytechnic State University, San Luis Obispo

Getting La To Net Positive Competition For Innovation In Design, Alexander Lohr

Architectural Engineering

For my senior project I participated in the Getting LA to Net Positive Competition for Innovation in Design competition which is part of the living building challenge. The Living Building Challenge™ is a building certification program, advocacy tool and philosophy that define advanced measure of sustainability in the building environment. The Challenge is comprised of seven performance categories called Petals: Place, Water, Energy, Health & Happiness, Materials, Equity and Beauty. Petals are subdivided into a total of twenty Imperatives, each of which focuses on a specific sphere of influence. The competition is run by the Living Building Challenge Collaborative: Los Angeles.

For the competition the class ARCH 351 has decided to do a redesign of the Olympic Village. Los Angeles will host the summer games in 2024 and already have a plan for their Olympic Village; the ARCH 351 class hopes to accomplish an Olympic Village design that will better fit LA for the future as opposed to the current design which they feel only reflects the whims of the moment. I ...


Quantification Of Time Varying Directivity Of Musical Instruments, Madeline A. Davidson 2016 University of Nebraska - Lincoln

Quantification Of Time Varying Directivity Of Musical Instruments, Madeline A. Davidson

Architectural Engineering -- Dissertations and Student Research

Static directivity patterns of musical instruments have been mapped somewhat extensively, but little research has been done in analyzing the directivity patterns of musical instruments over time as they play. Directivity patterns can be affected by variables such as instrument, frequency, dynamics, and style. This thesis proposes a set of quantification methods of time varying directivity, all derived from the maximum Directivity Index analyzed at consecutive short-duration time windows comprising the musical excerpt. The instrumental recordings used in this paper are taken in an anechoic chamber using either a 5, 13, or 32 multichannel setup. From the values of maximum ...


The Function And Format Of Bills Of Quantities:An Irish Context, Tony Cunningham 2016 Dublin Institute of Technology

The Function And Format Of Bills Of Quantities:An Irish Context, Tony Cunningham

Other Resources

The production of bills of quantities as a means of obtaining tenders has traditionally been viewed as a primary function of the quantity surveying profession.

This study investigates the function and format of bills of quantities in the Irish context. It explains the nature of bills, how they are compiled, and identifies the situations in which they may be used. The primary functions of the bill as a means of obtaining tenders and its status as a contract document are explored. The study also addresses particular aspects of the bill which may aid the effective management of construction projects for ...


Ogden College Of Science And Engineering Newsletter,, Cheryl Stevens, Dean, Ogden College of Science and Engineering 2016 Ogden College of Science & Engineering

Ogden College Of Science And Engineering Newsletter,, Cheryl Stevens, Dean, Ogden College Of Science And Engineering

Ogden College of Science & Engineering Publications

No abstract provided.


Structural Damage Detection By Comparison Of Experimental And Theoretical Mode Shapes, William George Rosenblatt 2016 California Polytechnic State University, San Luis Obispo

Structural Damage Detection By Comparison Of Experimental And Theoretical Mode Shapes, William George Rosenblatt

Master's Theses and Project Reports

Existing methods of evaluating the structural system of a building after a seismic event consist of removing architectural elements such as drywall, cladding, insulation, and fireproofing. This method is destructive and costly in terms of downtime and repairs. This research focuses on removing the guesswork by using forced vibration testing (FVT) to experimentally determine the health of a building. The experimental structure is a one-story, steel, bridge-like structure with removable braces. An engaged brace represents a nominal and undamaged condition; a dis-engaged brace represents a brace that has ruptured thus changing the stiffness of the building. By testing a variety ...


An Introduction To Green Walls: Green Facade, Mehdi Rakhshandehroo 2015

An Introduction To Green Walls: Green Facade, Mehdi Rakhshandehroo

mrakhshandehroo@yahoo.com

Although green wall is not a new concept and date back to hanging gardens of Babylonia in 600 BC, but flourished in current decades. In the age of sustainable development planners and architects look for solutions to green the buildings envelops and restore environmental conditions. A variety of different terminology in this area indicates the importance of issue: Hanging or vertical gardens, balcony gardens, vertical farms, containers or planter boxes greening, green roofs or rooftop gardens, green or eco buildings, green walls, wall planters, green envelops and green facades. They can be applied to increase bio diversity and ecological value ...


(Θ,Φ)*-Derivations On Complex Semi-Prime Banach *-Algebras, Ismail Nikoufar, A. Ebadian, M. Eshaghi 2015 Payame Noor University

(Θ,Φ)*-Derivations On Complex Semi-Prime Banach *-Algebras, Ismail Nikoufar, A. Ebadian, M. Eshaghi

Ismail Nikoufar

In this paper, we prove that (θ, φ)∗-derivations on complex semi–prime ∗-algebras can be represented by double (θ, φ) -centralizers. As an application, we prove a result in automatic continuity of (θ, φ)∗-derivations and α-derivations.


An Introduction To Green Walls: Green Facade, Mehdi Rakhshandehroo 2015 University Putra Malaysia

An Introduction To Green Walls: Green Facade, Mehdi Rakhshandehroo

mrakhshandehroo@yahoo.com

Although green wall is not a new concept and date back to hanging gardens of Babylonia in 600 BC, but flourished in current decades. In the age of sustainable development planners and architects look for solutions to green the buildings envelops and restore environmental conditions. A variety of different terminology in this area indicates the importance of issue: Hanging or vertical gardens, balcony gardens, vertical farms, containers or planter boxes greening, green roofs or rooftop gardens, green or eco buildings, green walls, wall planters, green envelops and green facades. They can be applied to increase bio diversity and ecological value ...


A Perspective Approach For Characterization Of Lieb Concavity Theorem, Ismail Nikoufar 2015 Payame Noor University

A Perspective Approach For Characterization Of Lieb Concavity Theorem, Ismail Nikoufar

Ismail Nikoufar

Lieb's extension theorem holds for generalized $p+q\in [0,1]$ and Ando convexity theorem holds for $q-r>1$. In this paper, we give a complete characterization for concavity or convexity of Lieb well known theorem in the case where $p+q\geq 1$ or $p+q\leq 0$. We also characterize some auxiliary results including Ando theorem for $q-r\leq1$.


An Introduction To Green Walls: Living Walls, Mehdi Rakhshandehroo 2015 University Putra Malaysia

An Introduction To Green Walls: Living Walls, Mehdi Rakhshandehroo

mrakhshandehroo@yahoo.com

In the challenge of urban expansion and environmental preservation, sustainable development is a significant response to our century’s requirements. Although vertical greening (green walls) are not a new concept but flourished during the last decade as one of the approaches to sustainability. Vertical gardens, vertical farms, balcony gardens, containers or planter boxes greening, green or eco-buildings, wall planters, and green envelops are all different types of green walls. Planners and designers can look for enhanced solutions where the facades are more than tinted glass barrier; greening the building envelope with vegetation can be used as a mean to restore ...


Dispute Resolution Under The Principal Irish Forms Of Building Contract, Tony Cunningham 2015 Dublin Institute of Technology

Dispute Resolution Under The Principal Irish Forms Of Building Contract, Tony Cunningham

Other Resources

The construction industry is known to be litigious (Latham, 1994). This is hardly surprising given the industry’s fragmented nature in which project teams comprising an extensive network of employers, designers and constructors are brought together to deliver once-off projects, following which, the organisation is almost always disbanded. The short term objectives of the various groupings are often competing and occasionally incompatible. For example, many employers will wish to minimise costs in developing a project, designers may resist pressures on budgets in order to safeguard their ‘brand’, and the commercial imperative of maximising profit will drive contractors towards charging what ...


Risk Allocation Under The Principal ‘Traditional’ Irish Forms Of Building Contract, Tony Cunningham 2015 Dublin Institute of Technology

Risk Allocation Under The Principal ‘Traditional’ Irish Forms Of Building Contract, Tony Cunningham

Other Resources

Construction projects are risky ventures. Risks are inevitable and cannot be entirely eliminated but they can be transferred through appropriate wording in the clauses of a contract. Construction contracts allocate particular risks between the parties in order to identify who bears the cost if a particular risk comes to pass.

This study examines how contractual risks are allocated to the contracting parties under the Royal Institute of Architects in Ireland Form, 2012 version, where quantities form part of the contract, commonly known as ‘the Yellow Form’, and the Public Works Contract PW CF1 Form v 1.10, 2014 where the ...


Estimation On Gibbs Entropy For An Ensemble, Lekhya Sai Sake 2015 Lekhya Sai Sake

Estimation On Gibbs Entropy For An Ensemble, Lekhya Sai Sake

Electronic Theses, Projects, and Dissertations

In this world of growing technology, any small improvement in the present scenario would create a revolution. One of the popular revolutions in the computer science field is parallel computing. A single parallel execution is not sufficient to see its non-deterministic features, as same execution with the same data at different time would end up with a different path. In order to see how non deterministic a parallel execution can extend up to, creates the need of the ensemble of executions. This project implements a program to estimate the Gibbs Entropy for an ensemble of parallel executions. The goal is ...


Tron 2.0 - The Experience, Alecsandro G. Vitale, Alexander W. Billings, Jordan Delfino, William Beechinor, Kelly Rorden 2015 California Polytechnic State University- San Luis Obispo

Tron 2.0 - The Experience, Alecsandro G. Vitale, Alexander W. Billings, Jordan Delfino, William Beechinor, Kelly Rorden

Architectural Engineering

The goal of this senior project was to come up with a structural-engineering-related schematic design for a roller coaster to be installed in Disneyland called TRON 2.0: The Experience. This involved looking at both design processes that we had already learned through our curriculum as well as researching concepts that were previously foreign to us, namely the dynamic application of loads and the effects of fatigue stresses.

A story was established based on the source material: the TRON movies produced by Walt Disney Studios. Thematic elements from the story were used as the basis for design implications that would ...


Discomfort Glare From Small, High Luminance Light Sources In Outdoor Nighttime Environments, Yulia I. Tyukhova 2015 University of Nebraska – Lincoln

Discomfort Glare From Small, High Luminance Light Sources In Outdoor Nighttime Environments, Yulia I. Tyukhova

Architectural Engineering -- Dissertations and Student Research

The overarching goal of this research was to examine humans’ subjective and physiological responses to small, high luminance light sources in outdoor nighttime environments. Currently, discomfort glare is rarely calculated in lighting practice (Remaking Cities Institute (RCI) 2011), partly, because it is not known which metric predicts glare most accurately in the given application.

This dissertation describes a parametric experiment evaluating the effects of three glare source luminances (20,000; 205,000; 750,000 cd/m2), two source positions (0°, 10°), two source sizes (10-5, 10-4 sr), and three background luminances (0.03; 0.3; 1 cd ...


Issues Facing Design Professionals Through The Lens Of Two Rain-Induced Roof Collapses, J. W. Lawson, M. E. Parolini 2015 California Polytechnic State University, San Luis Obispo

Issues Facing Design Professionals Through The Lens Of Two Rain-Induced Roof Collapses, J. W. Lawson, M. E. Parolini

Architectural Engineering

The drainage of low-sloped roof systems involves multiple design professionals, and often each has a different opinion as to their design responsibility. Roofing issues have been identified as being a number one source of litigation, and rain-induced roof collapses continue to occur with alarming frequency. With the backdrop of several rain-induced roof collapses, this paper illustrates the complexity of assigning design responsibility for drainage systems; and investigates a variety of outcomes associated with the current building code provisions transporting rainwater from large low-sloped roof structures.


"Defining Job Titles And Career Paths In Bim", Malachy Mathews 2015 Dublin Institute of Technology

"Defining Job Titles And Career Paths In Bim", Malachy Mathews

Conference papers

Ireland is undergoing a digital transformation. Some industries particularly in the areas of travel and retail have been radically transformed. However many industries are facing their biggest challenge in their existence already weakened by the economic crisis and constrained by their legacy business, it will be difficult for them to adapt and embrace the new rules dictated by digital change. Irelands design and construction industry is on the cusp of a digital transformation with early adopters now deriving some benefits from a move to a building information modeling (BIM) process. Digital transformation cannot happen unless there are personnel with the ...


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