Physical Impact Of Waterjet-Based Sediment Remediation On Benthic Organisms,
2011
Missouri University of Science and Technology
Physical Impact Of Waterjet-Based Sediment Remediation On Benthic Organisms, Grace Harper, Andrew Curtis Elmore, Christopher Redell, Gavin Risley, Joel Gerard Burken
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Adding Activated Carbon to Sediments Has Been Shown to Be an Effective Means of Reducing the Bioavailability of Certain Contaminants. the Current State of the Practice is to Mechanically Mix Activated Carbon to a Target Concentration of 3 Percent at Depths of Approximately 30 Cm using a Rotovator or Similar Construction Equipment. Waterjets Have Been Used to Cut Hard Material using a Mixture of Water and an Abrasive. If Activated Carbon is Substituted for the Abrasive, Waterjets Have the Potential to Use Surface Injection as a Replacement for Mechanical Mixing during Sediment Remediation. a Perceived Benefit of Waterjet-Based Sediment Remediation …
A Novel Photovoltaic/Battery Structure For Solar
Electrical Vehicles [Pvbs For Sev],
2011
University of Nebraska - Lincoln
A Novel Photovoltaic/Battery Structure For Solar Electrical Vehicles [Pvbs For Sev], Mahmoud Alahmad, Mohamed Amer Chaaban, Lana Chaar
Durham School of Architectural Engineering and Construction: Faculty Publications
In this paper, we propose a new flexible Photovoltaic/Battery charging Structure for Solar Electrical Vehicles (PVBS), where the interconnection of the system is dynamically changing based on current shading conditions across PV modules to provide intelligent system, as well as to provide flexibility, performance, and efficiency enhancement for the SEV. PVBS is expected to 1) provide a battery charging efficiency improvement over existing employed topologies; 2) provide new means to match the computing load with the PV system performance metrics shading and mismatches; 3) and provide elastic reconfigurable system expected to spur research advancements and innovations to make future SEV …
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
Durham School of Architectural Engineering and Construction: Faculty Publications
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 …
Non-Intrusive Electrical Load Monitoring And
Profiling Methods For Applications In Energy
Management Systems,
2011
University of Nebraska - Lincoln
Non-Intrusive Electrical Load Monitoring And Profiling Methods For Applications In Energy Management Systems, Mahmoud Alahmad, Hosen Hasna Hh, Evans Sordiashie
Durham School of Architectural Engineering and Construction: Faculty Publications
"Phantom Loads" cause energy waste in homes and the built environment as a whole. Consumers spend more than $3 billion a year on "Phantom Load" in the United States alone. The goal of this paper is to conserve energy by increasing consumer awareness on their energy usage and reducing and /or eliminating phantom loads in the built environment. A further goal is to improve upon existing power distribution systems in the built environment with limited hardware additions to increase energy conservation. This paper investigates remote identification of load types and the locations along the electrical circuitry where they (load) are …
Industry-Experienced Graduate Student Program: Innovative Collaboration In Architectural Engineering At The
University Of Nebraska–Lincoln,
2011
University of Nebraska-Lincoln
Industry-Experienced Graduate Student Program: Innovative Collaboration In Architectural Engineering At The University Of Nebraska–Lincoln, Clarence E. Waters, Steve Alvine, Michelle L. Eble-Hankins
Durham School of Architectural Engineering and Construction: Faculty Publications
In 2001, the Architectural Engineering Department at the University of Nebraska–Lincoln, along with industry partners, established an industry-experienced graduate student program. The program was developed to bring experienced design professionals to collaborate with the industry while pursuing a Ph.D. in architectural engineering. This program is designed to be mutually beneficial to industry partners, -graduate students, the University of Nebraska–Lincoln Architectural Engineering Department, and the building industry at large. The first doctoral candidate in the program graduated, and significant collaborative work was completed for the industry partner. All parties to this initial offering are pleased with the outcome and believe the …
Perceptions And Experiences Of Diverse Architectural Technology Students Learning Through Formative Feedback & Formative Assessment: A Multiple-Case Study,
2011
Technological University Dublin
Perceptions And Experiences Of Diverse Architectural Technology Students Learning Through Formative Feedback & Formative Assessment: A Multiple-Case Study, Catherine Prunty
Masters
Technological leaps along with increased numbers and greater student diversity is altering the higher education teaching landscape constantly. The academic's workload is escalating all the time, arising from resource constraints in a time of economic stringency. This places even more pressure on dealing with assessment rather than on enhancing learning. Despite evidence that supports formative assessment as being vitally important to students' learning, it is not widely appreciated among lecturers in higher education. As a result, lecturers under pressure, understandably, will maintain existing assessment and teaching systems rather than attempt to apply new techniques. Immeasurable hours, days or even weeks, …
The “Bim’S 4d+” Dimension: Real Time Energy Monitoring,
2011
University of Nebraska - Lincoln
The “Bim’S 4d+” Dimension: Real Time Energy Monitoring, Mahmoud Alahmad, Wisam Nader, Adam Brumbaugh, Yong Cho, Song Ci, Hamid Sharif, Jonathan Shi, Jill Neal
Durham School of Architectural Engineering and Construction: Faculty Publications
With the current trend towards Building Information Model (BIM), facility managers have a new tool for raising efficiency. This paper discusses the integration of the BIM software with a real-time monitoring (RTM) system, as a 4D+ dimension in BIM, to track the electrical usage at every location in a building. This ability could be invaluable in identifying what unnecessary loads are connected to a device and could be disconnected. This would result in elimination of needless loads and phantom loads during non-business hours, causing significant reduction in energy consumption. A prototype of the RTM was built and the results are …
Green And Sustainable Technologies For The Built
Enviornment,
2011
University of Nebraska - Lincoln
Green And Sustainable Technologies For The Built Enviornment, Mahmoud Alahmad, Muhammad Zulfiqar, Hosen Hasna Hh, Hamid Sharif, Evans Sordiashie, Nasser Aljuhaishi
Durham School of Architectural Engineering and Construction: Faculty Publications
Energy conservation is among society’s greatest challenges, and the built environment has a concentrated impact on our natural environment, economy, and health. Fundamental understandings of how energy is consumed, monitored, and controlled are key prerequisites for an energy conservation process. This paper evaluates the effectiveness of real-time energy monitors (RTM) to influence behavior change in residential consumers. A methodology for remote identification of load types and the locations along the electrical circuitry where they (load) are being consumed is also presented. The load type and status (on, off, standby) are determined both remotely and in a non-intrusive manner using Non-Intrusive …
An Adaptive Photovoltaic-Inverter Topology,
2011
University of Nebraska - Lincoln
An Adaptive Photovoltaic-Inverter Topology, Mahmoud Alahmad, Mohamed Amer Chaaban, Siu Kit Lau
Durham School of Architectural Engineering and Construction: Faculty Publications
A new inverter topology for Adaptive photovoltaic (PV) system is proposed. An improvement in the power generation of the system during different operating conditions is achieved. The proposed configuration provides flexible connection between the PV modules and the inverters to meet current conditions of PV array. Preliminary simulation results are provided for an adaptive PV array. Efficiency comparison between traditional PV system configurations is discussed. Potential improvement using the proposed adaptive configuration is sited.
Combinatorics & Power Consumption,
2011
University of Nebraska - Lincoln
Combinatorics & Power Consumption, Mahmoud Alahmad, Wisam Nader
Durham School of Architectural Engineering and Construction: Faculty Publications
in this paper the power consumption possible combinations for a number of loads and a single power source are discussed. The proposed mathematical model depends basically on combinatorics to estimate how many ways are possible to operate different loads powered by a single power source. This paper takes into consideration the different conditions and limitations to operate n number of loads limited by their minimum and maximum values of power consumption. Four different cases of operations are discussed and modeled. A flowchart and a step-by-step method to do the calculations for a general case is also illustrated at the end …
Addressable And Energy Management
System For The Built Environment (I),
2011
University of Nebraska - Lincoln
Addressable And Energy Management System For The Built Environment (I), Mahmoud Alahmad, Hosen Hasna Hh, Evans Sordiashie
Durham School of Architectural Engineering and Construction: Faculty Publications
The increasing awareness for a cleaner earth has created more interests in the electric vehicle (EV) technology. Electric vehicles (EVs) will not only cause a reduction in our current greenhouse gas emissions, but also stop or reverse the trend at which our natural resources are being depleted. However, the introduction of the EVs into our societies will still require energy usage in the form of electricity. Integration of charging infrastructures will eventually be required in the built environment for these vehicles. This will add to the current energy consumption in the built environment which will mean more emission of CO2, …
Tracking The Use Of Leed® In Facilities For Higher Education,
2011
Technological University Dublin
Tracking The Use Of Leed® In Facilities For Higher Education, Shannon Chance
Articles
America’s 4391 institutions of higher learning own roughly 240,000 buildings according to The Carnegie Foundation for the Advancement of Teaching (2009) and the United States Green Building Council [USGBC] (n.d.). Most of these buildings’ designs reflect a time when energy was cheap and material abundant. Throughout the past century, building designs frequently ignored their surroundings, usurped energy at appalling rates, and did little to teach inhabitants respect for the environment
Sustainable Design Optimization Of Rural Houses In North China,
2011
Purdue University
Sustainable Design Optimization Of Rural Houses In North China, Mingliang Li
Purdue Polytechnic Masters Theses
With the rapid economic development of China, the living standards in rural areas have been experiencing improvement over the past two decades. One important aspect of the improved living standards is housing, which has been transformed from traditional adobe or stone structures into modern brick and concrete ones. In the meantime, active heating and cooling systems are gradually being incorporated and residents are requiring more comfortable indoor air temperatures during cold winters and hot summers. However, most rural houses have no insulation in their exterior walls and roofs. The question is whether or not it is economically viable to build …
Optimization Of Energy Storage Systems In Hev's,
2011
University of Nebraska - Lincoln
Optimization Of Energy Storage Systems In Hev's, Mahmoud Alahmad, Mohamed Amer Chaaban
Durham School of Architectural Engineering and Construction: Faculty Publications
This paper introduces a novel battery model inspired by molecular structures mainly for applications in HEV’s. This novel 3-D adaptive battery topology shows potential for improvement in input and output performance as well as the charging/ discharging efficiency of batteries. The proposed topology provides flexible connections between battery cells to achieve different configurations of battery. A new switching matrix has been developed to achieve the required configurations. Preliminary simulations provide promising results for an adaptive 3-D battery configuration. Comparison between traditional battery configurations and the adaptive 3-D configuration is considered. A significant improvement in power curves is achieved by the …
Using Case Studies To Characterize The Broader Meaning Of Engineering Design For Today’S Student,
2011
California Polytechnic State University - San Luis Obispo
Using Case Studies To Characterize The Broader Meaning Of Engineering Design For Today’S Student, Pamalee A. Brady, John W. Lawson
Architectural Engineering
Numerous organizations have undertaken the task of envisioning the education required to meet the engineering demands of the future. The ABET study EC2000, ASCE’s Civil Engineering Body of Knowledge and Body of Knowledge 2 and the National Academy of Engineering have documented the need to change engineering education from its historical focus on technical content knowledge to include greater emphasis on professional issues and to integrate engineering practice into education. To this end teaching methods such as project-based learning, and the use of case studies are being explored to address these broader learning outcomes. Case studies in particular facilitate telling …
Crossings,
2011
Technological University Dublin
Crossings, Noel Brady
Books/Book Chapters
Chapter concentrates on the bridges of Dublin’s river Liffey; their importance to the vitality of the city, its commerce and people. It also highlights the importance of crossings in the city linking and opening up new paths to growth and development.
High-Strength Selfconsolidating Concrete Girders Subjected To Elevated Compressive Fiber Stresses, Part 2: Structural Behavior,
2011
Missouri University of Science and Technology
High-Strength Selfconsolidating Concrete Girders Subjected To Elevated Compressive Fiber Stresses, Part 2: Structural Behavior, Jared E. Brewe, John J. Myers
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The design of prestressed concrete members is restricted by the requirement that the extreme compressive fiber stress at midspan be less than 60% of the concrete compressive strength at release of prestressing. the purported purpose of this limit is to provide serviceability performance, but it places unnecessary limits on the capability of the materials. for this research program, six prestressed concrete girders were produced with high-strength, self-consolidating concrete and subjected to elevated compressive fiber stress levels ranging from 65% to 84% of initial concrete compressive strength at release of prestressing. Part 1 of this series analyzed time-dependent prestress losses and …
Reaction Rates Of Ozone And Terpenes Adsorbed To Model Indoor Surfaces,
2011
Missouri University of Science and Technology
Reaction Rates Of Ozone And Terpenes Adsorbed To Model Indoor Surfaces, M. Springs, J. R. Wells, Glenn Morrison
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Reaction rates and reaction probabilities have been quantified on model indoor surfaces for the reaction of ozone with two monoterpenes (Δ3-carene and d-limonene). Molar surface loadings were obtained by performing breakthrough experiments in a plug-flow reactor (PFR) packed with beads of glass, polyvinylchloride or zirconium silicate. Reaction rates and probabilities were determined by equilibrating the PFR with both the terpene and the ozone and measuring the ozone consumption rate. to mimic typical indoor conditions, temperatures of 20, 25, and 30°C were used in both types of experiments along with a relative humidity ranging from 10% to 80%. the molar surface …
Special Section On Advanced Modeling And Numerical Simulations In Geomechanics,
2011
Missouri University of Science and Technology
Special Section On Advanced Modeling And Numerical Simulations In Geomechanics, Louis Ge, Dar Hao Chen, Rafiqul Alam Tarefder
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
No abstract provided.
Development Of A Waterjet System For Direct Delivery Of Granular Iron And Activated Carbon To Remediate Contaminated Aqueous Sediments,
2011
Missouri University of Science and Technology
Development Of A Waterjet System For Direct Delivery Of Granular Iron And Activated Carbon To Remediate Contaminated Aqueous Sediments, Gavin H.R. Risley, Andrew Curtis Elmore, Joel Gerard Burken, Grzegorz (Greg) Galecki
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
While the Techniques and Technologies Associated with Contaminated Sediment Remediation Are Relatively Mature, There Are Several Issues Associated with These Practices that Make Them Unattractive. the Inability of Currently Used Mechanical Mixing Implements to Place Amendments in Aqueous Environments and their Intrusive Behavior toward Benthic Communities Are Just Two Examples of a Necessity for an Improved Delivery Method. Waterjets May Be a Viable Option for Placement of Particulate Remediation Amendments, Such as Activated Carbon and Granular Iron, at Depth. a Custom Waterjet Nozzle and Injection System Has Been Fabricated by the Authors to Examine This Delivery Concept. the Developed Injection …
