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Articles 961 - 990 of 1547
Full-Text Articles in Construction Engineering
Investigating Self-Cooling Effects Of Ventilated Attics Under Different Roof And Ambient Temperatures In Summer, Zhigang Shen, Shimin Wang
Investigating Self-Cooling Effects Of Ventilated Attics Under Different Roof And Ambient Temperatures In Summer, Zhigang Shen, Shimin Wang
Durham School of Architectural Engineering and Construction: Faculty Publications
An unsteady computational fluid dynamics model is employed to simulate summer-time buoyancy-driven turbulent ventilation in gable-roof attics of residential buildings. The energy performance of vented attics is assessed by comparing their performance to sealed attics with the same geometry and insulation configurations. The simulated boundary conditions of the roof-top temperature ranging between 295.15 K and 345.15 K, coupled with an ambient temperature ranging between 295.15 K and 315.15 K, resemble the summer attic conditions with effects of solar irradiance on the roofs. Simulation results indicate that both the vented and sealed attics are dominated by thermal stratification. The cooling load …
Implementing Building Information Modeling In Public Works Projects In Ireland, Barry Mcauley, Alan V. Hore, Roger West
Implementing Building Information Modeling In Public Works Projects In Ireland, Barry Mcauley, Alan V. Hore, Roger West
Conference papers
The Irish State in recent years has suffered huge financial losses in the public works sector, which has now pushed the Irish Government to explore new ways of controlling cost. This background lead to the introduction of the Capital Works Management Framework in 2007 which aimed to support the certainty of outcome in terms of cost and quality, as well as improved risk management, through the implementation of fixed price contracts. In order to successfully compete within this framework it is recommended by the authors, that Irish Government moves towards the legal mandating of BIM. This can ensure a greater …
Use Of Building Information Modelling In Responding To Low Carbon Construction Innovations: An Irish Perspective - Presentation, Barry Mcauley
Use Of Building Information Modelling In Responding To Low Carbon Construction Innovations: An Irish Perspective - Presentation, Barry Mcauley
Conference papers
No abstract provided.
A Spectacle Of Great Beauty: The Changing Faces Of Hagia Sophia, Victoria M. Villano
A Spectacle Of Great Beauty: The Changing Faces Of Hagia Sophia, Victoria M. Villano
Master's Theses
No abstract provided.
Framework Development For Construction Safety Visualization, Kishor Shrestha
Framework Development For Construction Safety Visualization, Kishor Shrestha
UNLV Theses, Dissertations, Professional Papers, and Capstones
Throughout the history of the construction industry, many fatalities and injuries have occurred in construction sites. One of the major causes of accidents is unsafe site conditions; basically, this is due to inadequate supervision. To improve upon the traditional supervision approach, this study proposes a `Framework Development for Construction Safety Visualization' approach. In addition to this, a computer vision Edge Detection Algorithm was developed and tested to convert construction site still images into edges of the objects in the images. The framework development of this study uses computer vision, robot vision, image compression, pattern recognition, internet transmission, network communication, and …
A Composite Structural Steel And Prestressed Concrete Beam For Building Floor Systems, Nathan Dewit
A Composite Structural Steel And Prestressed Concrete Beam For Building Floor Systems, Nathan Dewit
Durham School of Architectural Engineering and Construction: Dissertations, Theses, and Student Research
Precast prestressed concrete beams, such as rectangular and inverted tee beam, currently used in residential and commercial buildings are deep, heavy, and limited to span-to-depth ratios of 15. The research proposes a composite structural steel and prestressed concrete beam that is shallow, light, easy to produce and erect, and able to achieve a span-to-depth ratio of 24. The proposed beam is designed to be used with precast columns, hollow-core planks, and a cast-in-place topping to create a moment-resisting floor system that minimizes the need for shear walls. The goal of this system is to eliminate as many of the limitations …
A Model Of Housing Design And Neighborhood Planning In Abuja - Nigeria, Ekanem Amba
A Model Of Housing Design And Neighborhood Planning In Abuja - Nigeria, Ekanem Amba
Master of Technology Management Plan II Graduate Projects
The need for shelter is one of the most important necessities for mankind after sustenance. Over the years, the term ‘shelter’ has undergone series of modification either in shape, space, location or the materials used in constructing them but one thing remains the same; the need for a roof over one’s head is as vital to survival as time in itself.
A Carbon Dioxide Comparison Of Open Cut And Pipe Bursting, Akshay Joshi
A Carbon Dioxide Comparison Of Open Cut And Pipe Bursting, Akshay Joshi
Master of Technology Management Plan II Graduate Projects
This study focuses on the environmental aspect of the underground utility construction methods namely open-cut and pipe-bursting. The research is aimed at determining the CO2 emission due to the use of construction machinery as well as the excess CO2 emission due to the obstruction to traffic during the construction process. A Gravity sewer project in Bowling Green, OH was used as a case study. Open- cut method was implemented on this project and for the purpose of this research the pipe-bursting method was simulated. A 5100 feet long, 8 inches diameter pipeline was considered at a depth of 10 feet …
Economic Case For Early Adoption Of Facilities Management - Presentation, Barry Mcauley
Economic Case For Early Adoption Of Facilities Management - Presentation, Barry Mcauley
Conference papers
No abstract provided.
The Economic Case For Early Adoption Of Facilities Management, Barry Mcauley, Alan V. Hore, Roger West, John Wall
The Economic Case For Early Adoption Of Facilities Management, Barry Mcauley, Alan V. Hore, Roger West, John Wall
Conference papers
The construction industry in Ireland has been the sector hit the hardest during the recession with a potential return to output volumes of the mid-1990s. In order to compete within this struggling construction sector the traditional way of doing business must be re-engineered. One of the ways to achieve this is by introducing the Facilities Management (FM) process much earlier into the construction process, in order to maximize long term sustainability, and above all whole life construction costs. This paper will focus on a recently constructed sports clinic in Dublin, in which an aggressive programme was introduced around energy management …
Redesigning The Warren Animal Shelter, Bandar Alotaibi, Nicholas Baldasarre, Sean Barrett, Jacqueline Brauer, Perry Cry, Erin D'Allesandro, Joseph D'Oria, Jason Doughty, Alison Fredericks, Samantha Howard, Anthony Izzo, Matthem Jesi, Jozef Karpiel, Daniel L'Esperance, Robin Sharp, Emily Sperini, Gary Graham, Frederick Gould, Arnold Robinson
Redesigning The Warren Animal Shelter, Bandar Alotaibi, Nicholas Baldasarre, Sean Barrett, Jacqueline Brauer, Perry Cry, Erin D'Allesandro, Joseph D'Oria, Jason Doughty, Alison Fredericks, Samantha Howard, Anthony Izzo, Matthem Jesi, Jozef Karpiel, Daniel L'Esperance, Robin Sharp, Emily Sperini, Gary Graham, Frederick Gould, Arnold Robinson
Architecture and Urban Design
The new shelter should incorporate improved natural lighting and ventilation, adequate space for laundry facilities and more space for the animals' living and bathing needs. The design should consider how to prevent dogs from barking and disturbing one another while in the kennels. Increased storage is necessary for the animal shelter to contain the food and living amenities for the incoming animals.
From The Personal To The Communal - Support For An Evolutionary Urban System, Noel Brady
From The Personal To The Communal - Support For An Evolutionary Urban System, Noel Brady
Conference papers
A short discussion towards a model for the future of urban and interurban development. From the personal tot he communal argues for a futurist city that is an organic physiological time filled environment.
Ua61/3 Wku Nursing & Physical Therapy - The Medical Center - Wku Health Sciences Complex, Wku Health & Human Services
Ua61/3 Wku Nursing & Physical Therapy - The Medical Center - Wku Health Sciences Complex, Wku Health & Human Services
WKU Administration Documents
Fundraising brochure regarding The Medical Center – WKU Health Sciences Complex constructed from 2012 through 2014. Features architectural renderings of each floor.
Life Cycle Cost Analysis Under Ireland's Capital Works Management Framework, Dermot Kehily, Alan Hore
Life Cycle Cost Analysis Under Ireland's Capital Works Management Framework, Dermot Kehily, Alan Hore
Conference papers
The Capital Works Management Framework (CWMF) is a structure that has been developed to deliver the Irish government’s objectives in relation to public sector construction procurement reform. This research provides practical guidance and assistance for construction cost professionals in carrying out Whole Life Cycle Cost Analysis (WLCCA) and producing Life Cycle Cost Models(LCCMs) under the CWMF. The research outlines how LCCA calculations can be carried out for cost planning purposes and recommends a standard methodology for presenting LCCMs under the CWMF. The CWMF states that Whole Life Costs (WLC) are an important consideration throughout the design process and should be …
2:1 The Paper Tube Project, Noel Brady
2:1 The Paper Tube Project, Noel Brady
Articles
Review of applied technological solution to rapid building techniques using paper tube and analogous materials to create space enclosing geodesic systems.
A Directionally Tunable But Frequency-Invariant Beamformer On An Acoustic Velocity-Sensor Triad To Enhance Speech Perception, Yue Ivan Wu, Kainam Thomas Wong, Xin Yuan, Siu-Kit Lau, Shiu-Keung Tang
A Directionally Tunable But Frequency-Invariant Beamformer On An Acoustic Velocity-Sensor Triad To Enhance Speech Perception, Yue Ivan Wu, Kainam Thomas Wong, Xin Yuan, Siu-Kit Lau, Shiu-Keung Tang
Durham School of Architectural Engineering and Construction: Faculty Publications
Herein investigated are computationally simple microphone-array beamformers that are independent of the frequency-spectra of all signals, all interference, and all noises. These beamformers allow the listener to tune the desired azimuth-elevation “look direction.” No prior information is needed of the interference. These beamformers deploy a physically compact triad of three collocated but orthogonally oriented velocity sensors. These proposed schemes’ efficacy is verified by a jury test, using simulated data constructed with Mandarin Chinese (a.k.a. Putonghua) speech samples. For example, a desired speech signal, originally at a very adverse signal-to-interference-and-noise power ratio (SINR) of -30 dB, may be processed to become …
Application Of Drum-Buffer-Rope Methodology In Scheduling Of Healthcare System, Arefeh Mohammadi, Emmanuel S. Eneyo
Application Of Drum-Buffer-Rope Methodology In Scheduling Of Healthcare System, Arefeh Mohammadi, Emmanuel S. Eneyo
Durham School of Architectural Engineering and Construction: Faculty Publications
Theory of constraints (TOC) is a management philosophy that seeks to increase throughput (efficiency or performance) of the system by identifying those processes that are constraining the system bottlenecks. There have been very few profound studies of TOC in health care systems. In order to fill this gap, this study was conducted to determine how healthcare systems are utilizing components of TOC to schedule operations and what results are being obtained. This is done by using a patient flow model for a radiotherapy section of a hospital. The drum-buffer-rope (DBR) was used as the methodology for scheduling this flow. Successful …
Teaching Sustainable Design Using Bim And Project-Based Energy Simulations, Zhigang Shen, Wayne Jensen, Tim Wentz, Bruce Fischer
Teaching Sustainable Design Using Bim And Project-Based Energy Simulations, Zhigang Shen, Wayne Jensen, Tim Wentz, Bruce Fischer
Durham School of Architectural Engineering and Construction: Faculty Publications
The cross-disciplinary nature of energy-efficient building design has created many challenges for architecture, engineering and construction instructors. One of the technical challenges in teaching sustainable building design is enabling students to quantitatively understand how different building designs affect a building’s energy performance. Concept based instructional methods fall short in evaluating the impact of different design choices on a buildings’ energy consumption. Building Information Modeling (BIM) with energy performance software provides a feasible tool to evaluate building design parameters. One notable advantage of this tool is its ability to couple 3D visualization of the structure with energy performance analysis without requiring …
Effects Of Roof Pitch On Air Flow And Heating Load Of Sealed And Vented Attics For Gable-Roof Residential Buildings, Shimin Wang, Zhigang Shen
Effects Of Roof Pitch On Air Flow And Heating Load Of Sealed And Vented Attics For Gable-Roof Residential Buildings, Shimin Wang, Zhigang Shen
Durham School of Architectural Engineering and Construction: Faculty Publications
Pitch value is an important consideration in residential gable roof design and construction. However, how roof pitch, coupled with air flows in attic space, affects the energy performance of building attics has been barely investigated. In this paper, a 2D unsteady computational fluid dynamics (CFD) model is employed to investigate the effects of roof pitch on air flow and heating load of both sealed and vented attics for gable-roof residential buildings. The simulation results show that air flow in the sealed attics is steady and asymmetric, while that in the vented attics is a combination of an essentially symmetric base …
Effects Of Inclusion Shapes Within Rigid Porous Materials On Acoustic Performance, Hyun Hong, Siu-Kit Lau
Effects Of Inclusion Shapes Within Rigid Porous Materials On Acoustic Performance, Hyun Hong, Siu-Kit Lau
Durham School of Architectural Engineering and Construction: Faculty Publications
The present study investigates the influence of various shapes of inclusions having same volume embedded in a porous rigid material. Previous studies showed improvement of the broadband sound absorption with particular shapes of inclusions. However, different volumes of the inclusions have been considered; therefore, the bulk densities are not the same for comparison. The present study extends the investigations of inclusions in porous materials with same volume (or bulk density) to eliminate the influence by the change of bulk density. The effects of shape will be discussed. Finite element modeling will be used for this study. Total four different shapes: …
Impacts Of Ventilation Ratio And Vent Balance On Cooling Load And Air Flow Of Naturally Ventilated Attics, Shimin Wang, Zhigang Shen
Impacts Of Ventilation Ratio And Vent Balance On Cooling Load And Air Flow Of Naturally Ventilated Attics, Shimin Wang, Zhigang Shen
Durham School of Architectural Engineering and Construction: Faculty Publications
The impacts of ventilation ratio and vent balance on cooling load and air flow of naturally ventilated attics are studied in this paper using an unsteady computational fluid dynamics (CFD) model. Buoyancy-driven turbulent ventilations in attics of gable-roof residential buildings are simulated for typical summer conditions. Ventilation ratios from 1/400 to 1/25 combined with both balanced and unbalanced vent configurations are investigated. The modeling results show that the air flows in the attics are steady and exhibit a general streamline pattern that is qualitatively insensitive to the variations in ventilation ratio and vent configuration. The predicted temperature fields are characterized …
The Impact Of Roof Pitch And Ceiling Insulation On Cooling Load Of Naturally-Ventilated Attics, Shimin Wang, Zhigang Shen, Linxia Gu
The Impact Of Roof Pitch And Ceiling Insulation On Cooling Load Of Naturally-Ventilated Attics, Shimin Wang, Zhigang Shen, Linxia Gu
Durham School of Architectural Engineering and Construction: Faculty Publications
A 2D unsteady computational fluid dynamics (CFD) model is employed to simulate buoyancy-driven turbulent ventilation in attics with different pitch values and ceiling insulation levels under summer conditions. The impacts of roof pitch and ceiling insulation on the cooling load of gable-roof residential buildings are investigated based on the simulation of turbulent air flow and natural convection heat transfer in attic spaces with roof pitches from 3/12 to 18/12 combined with ceiling insulation levels from R-1.2 to R-40. The modeling results show that the air flows in the attics are steady and exhibit a general streamline pattern that is qualitatively …
Development And Evaluation Of A Simplified Modeling Approach For Hydraulic Systems, Yuebin Yu, Vivian Loftness, Daihong Yu, Yan Lu, Volker Hartkopf
Development And Evaluation Of A Simplified Modeling Approach For Hydraulic Systems, Yuebin Yu, Vivian Loftness, Daihong Yu, Yan Lu, Volker Hartkopf
Durham School of Architectural Engineering and Construction: Faculty Publications
This paper presents how a hydraulic system can be properly modeled for hydraulic balancing, knowledge of flow distribution, coupled simulation, and evaluation of control, etc. It focuses on water-based heating and cooling systems, which generally have high energy efficiency in design but could perform poorly in reality due to the undersensing condition and strong thermal-hydraulic coupling. The study introduces the motivation, presents the simplified modeling methodology, and illustrates the model and simulating structure. A preliminary evaluation of the method is conducted with two simple simulations. The proposed “node-branch-state” modeling approach could be easily modified, expanded and integrated into a detailed …
Life Cycle Costing Template (Excel), Dermot Kehily