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Articles 38611 - 38640 of 196368

Full-Text Articles in Engineering

Emergency Relief Structure For Natural Disaster Evacuees And The Homeless Population, Madeline Yee, Margaret Tolan, Rodrigo Mendez Apr 2022

Emergency Relief Structure For Natural Disaster Evacuees And The Homeless Population, Madeline Yee, Margaret Tolan, Rodrigo Mendez

Civil, Environmental and Sustainable Engineering Senior Theses

In California, many communities lack the resources to provide support for natural disaster evacuees and those devastated by economic loss (our growing homeless community). An improved interim housing solution needs to be developed - a solution that provides comfort, privacy, and community - in the hopes of maintaining the dignity of those experiencing these hardships. In order to address this problem, the team designed a modular, panelized structure to provide shelter to those who are subject to emergency situations. A structural design and analysis was completed for both a cold-formed steel and a timber structure. A parcel of land in …

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Skin Phantom For Wearable Device Benchtop Testing, Laura Apolloni, Vindhya Mullapudi, Takumi Simon Apr 2022

Skin Phantom For Wearable Device Benchtop Testing, Laura Apolloni, Vindhya Mullapudi, Takumi Simon

Bioengineering Senior Theses

The biowerables constitute one of the fastests growing sectors of the medical device industry. Novel approaches for rapid prototyping have increased design and development speeds. However, in vivo testing that is currently used for many medical devices makes testing time-consuming, costly, and presents ethical issues. As an alternative, benchtop testing tools promise to alleviate these concerns. Artificial tissue phantoms that are capable of mimicking the characteristics of human tissues are required for demonstrating a medical device’s safety and efficacy in benchtop tests. While there are many hydrogels that are able to mimic these relevant properties of human tissue, creating a …

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Healthy Hive: A Beehive Health Management Tool, Kwadwo Amoako Apr 2022

Healthy Hive: A Beehive Health Management Tool, Kwadwo Amoako

Electrical and Computer Engineering Senior Theses

Honeybees are important pollinators and are essential in the preservation of ecosystems as well as agricultural production. They are crucial to the pollination of 85% of the world’s food crops. However, honeybee populations have been in decline over the past decade, due to external environmental conditions such as diseases and pests (invasive varroa mite), pollution (insecticide), or inadequate forage/poor nutrition. These conditions can have a severe impact on the health of hives. This project will serve as a tool for the monitoring system of tracking the activities of honeybees entering and exiting their beehive. The health condition of the bee …

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Vulnerable Vegetables And Efficient Fishers: A Study Of Primary Production Food Losses And Waste In Ireland, Tracey O'Connor, Rosanna Kleeman, Jennifer Attard Apr 2022

Vulnerable Vegetables And Efficient Fishers: A Study Of Primary Production Food Losses And Waste In Ireland, Tracey O'Connor, Rosanna Kleeman, Jennifer Attard

Publications

From 2022, the European Union Waste Framework Directive (WFD) requires member states to report annual food waste from each food supply chain stage. Comprehensive food losses and waste (FLW) data can be challenging to obtain for the primary production stage, i.e., farming and fishing. However, this information is vital in developing FLW mitigation actions appropriate to each country. This study describes the nature and extent of FLW from primary production in Ireland, using methods approved for WFD reporting. Causes of FLW and FLW as a proportion of total production were determined through interviews with Irish primary production stakeholders and using …

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Society Dilemma Of Computer Technology Management In Today's World, Iwasan D. Kejawa Ed.D Apr 2022

Society Dilemma Of Computer Technology Management In Today's World, Iwasan D. Kejawa Ed.D

School of Computing: Faculty Publications

Abstract - Is it true that some of the inhabitants of the world’s today are still hesitant in using computers? Research has shown that today many people are still against the use of computers. Computer technology management can be said to be obliterated by security problems. Research shows that some people in society feel reluctant or afraid to use computers because of errors and exposure of their privacy and their sophistication, which sometimes are caused by computer hackers and malfunction of the computers. The dilemma of not utilizing computer technology at all or, to its utmost, by certain people in …

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Prediction Of Concrete Strengths Enabled By Missing Data Imputation And Interpretable Machine Learning, Gideon A. Lyngdoh, Mohd Zaki, N.M. Anoop Krishnan, Sumanta Das Apr 2022

Prediction Of Concrete Strengths Enabled By Missing Data Imputation And Interpretable Machine Learning, Gideon A. Lyngdoh, Mohd Zaki, N.M. Anoop Krishnan, Sumanta Das

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Machine learning (ML)-based prediction of non-linear composition-strength relationship in concretes requires a large, complete, and consistent dataset. However, the availability of such datasets is limited as the datasets often suffer from incompleteness because of missing data corresponding to different input features, which makes the development of robust ML-based predictive models challenging. Besides, as the degree of complexity in these ML models increases, the interpretation of the results becomes challenging. These interpretations of results are critical towards the development of efficient materials design strategies for enhanced materials performance. To address these challenges, this paper implements different data imputation approaches for enhanced …

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Engr 692 Section 66: Randomized Algorithms, Yixin Chen Apr 2022

Engr 692 Section 66: Randomized Algorithms, Yixin Chen

GMAS Course Syllabi

No abstract provided.

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Cfd Simulation Of Varying Fuel Jet Placement Of Mach 2 Flow (Paper), Sara Broad Apr 2022

Cfd Simulation Of Varying Fuel Jet Placement Of Mach 2 Flow (Paper), Sara Broad

Honors Capstone Projects

Supersonic flow is a concept that has been researched heavily for the past twenty years. It has many applications, with the most notable one being for the defense industry. This project specifically is based off a model that is being currently used for Air Force research. With supersonic flow, where the Mach number is larger than one, there has been continual research specifically on flameholders. Flameholders involve the discussion of the mixing, ignition, and combustion of the fuel that is released into the lower cavity of the scramjet. There is a current standard for the placement of fuel jets, but …

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Low-Intensity Blast Induces Acute Glutamatergic Hyperexcitability In Mouse Hippocampus Leading To Long-Term Learning Deficits And Altered Expression Of Proteins Involved In Synaptic Plasticity And Serine Protease Inhibitors, Shanyan Chen, Heather R. Siedhoff, Hua Zhang, Pei Liu, Ashley Balderrama, Runting Li, Catherine E. Johnson, For Full List Of Authors, See Publisher's Website. Apr 2022

Low-Intensity Blast Induces Acute Glutamatergic Hyperexcitability In Mouse Hippocampus Leading To Long-Term Learning Deficits And Altered Expression Of Proteins Involved In Synaptic Plasticity And Serine Protease Inhibitors, Shanyan Chen, Heather R. Siedhoff, Hua Zhang, Pei Liu, Ashley Balderrama, Runting Li, Catherine E. Johnson, For Full List Of Authors, See Publisher's Website.

Mining Engineering Faculty Research & Creative Works

Neurocognitive consequences of blast-induced traumatic brain injury (bTBI) pose significant concerns for military service members and veterans with the majority of "invisible injury." However, the underlying mechanism of such mild bTBI by low-intensity blast (LIB) exposure for long-term cognitive and mental deficits remains elusive. Our previous studies have shown that mice exposed to LIB result in nanoscale ultrastructural abnormalities in the absence of gross or apparent cellular damage in the brain. Here we tested the hypothesis that glutamatergic hyperexcitability may contribute to long-term learning deficits. Using brain slice electrophysiological recordings, we found an increase in averaged frequencies with a burst …

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Radio-Frequency Interference Estimation For Multiple Random Noise Sources, Ling Zhang, Haochen Yang, Xiangrui Su, Qiaolei Huang, Jagan Rajagopalan, Deepak Pai, Chulsoon Hwang, Jun Fan Apr 2022

Radio-Frequency Interference Estimation For Multiple Random Noise Sources, Ling Zhang, Haochen Yang, Xiangrui Su, Qiaolei Huang, Jagan Rajagopalan, Deepak Pai, Chulsoon Hwang, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

As more compact designs and more assembled function modules are utilized in modern electronic devices, radio-frequency interference (RFI) source reconstruction is becoming more challenging because different noise sources may contribute simultaneously. This article presents a novel methodology to reconstruct multiple random noise sources on a real-world product, including several double-data-rate (DDR) memory modules and a high-speed connector. The DDR modules located beneath a heatsink cause random noise-like signals, which renders phase measurements challenging. An approach based on the tuned-receiver mode of a vector network analyzer is developed to measure the field phase from the random DDR signals, which can be …

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Cova Cci Undergrad Cyber Research, Nana Jeffrey Apr 2022

Cova Cci Undergrad Cyber Research, Nana Jeffrey

Cybersecurity Undergraduate Research Showcase

Is your digital assistant your worst enemy? Modern technology has impacted our lives in a positive way making tasks that were once time consuming become more convenient. For example a few years ago writing down your grocery list with a paper and pen was a norm, now with technology we have access to IoT devices such as smart fridges that can inform us on what items are low in stock, send a message to our digital assistants such as iOS Siri and Amazon's Alexa to remind us to buy those groceries. Although these digital assistants have helped make our daily …

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Arthur Cotton And The Development Of Public Works, Justin Patty Apr 2022

Arthur Cotton And The Development Of Public Works, Justin Patty

The Larrie and Bobbi Weil Undergraduate Research Award

In the long history of violence and cruelty that defined the period of British rule in India, Arthur Cotton is one of the few men remembered today not for his crimes, but for the good he did for the people of India. Cotton’s irrigation projects protected millions of Indians from the threat of famine, but the true legacy of his work is global in scope. As a major figure in the development of India’s infrastructure for most of the nineteenth century, Cotton witnessed the British Empire struggle with questions about its role in facilitating public works projects. Despite the Empire’s …

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Design And Optimization Of An Electron Cyclotron Resonance Thruster, Austen Thomas Apr 2022

Design And Optimization Of An Electron Cyclotron Resonance Thruster, Austen Thomas

Masters Theses

Presented in this work is the process in the design and optimization of a coaxial electron cyclotron resonance thruster. Electron cyclotron resonance thrusters are novel microwave-based thrusters which possess select technological advantages over mature electric propulsion concepts such as being electrodeless and only requiring a single power source. The thruster constructed in this work is a coaxial configuration and is termed the Western electron cyclotron resonance thruster. Thruster dimensions were optimized based on past experimentation completed with ECR thrusters. In an attempt to enhance the microwave plasma coupling of the coaxial thruster design three different antenna configurations were considered: a …

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Technology Demonstration, University Of North Dakota. Energy And Environmental Research Center Apr 2022

Technology Demonstration, University Of North Dakota. Energy And Environmental Research Center

EERC Brochures and Fact Sheets

Fact sheet about the Energy & Environmental Research Center’s technology demonstration abilities. Includes information on combustion systems, gasification and gas cleanup systems, and chemical and liquid processing. [This item is an outdated or superseded version and retained for historical purposes only. It may no longer reflect current information, policies, or practices.]

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Impulse, Spring 2022, University Marketing And Communications, Jerome J. Lohr College Of Engineering Apr 2022

Impulse, Spring 2022, University Marketing And Communications, Jerome J. Lohr College Of Engineering

Impulse (Jerome J. Lohr College of Engineering Publication)

2 | Ahmed Leads Construction and Operations Management
4 | Faculty News
8 | Kelley Steps Aside After 44 Years
12 | Boggs Retires From Mechanical Engineering
14 | Looking At Covid-19 Numbers
16 | Students Help College of Nursing
18 | Midwest Applied Materials Symposium Debuts
20 | Fourth Data Science Event Takes Place
24 | College Achievements
26 | Hard Work Pays Off
28 | Spotlight Shines on Students
30 | Mentoring Program Takes Off
32 | Robotics Club Busy With Activities
34 | The Numbers
36 | Brown, Sieve Honored
38 | Alumna Leads NASA Division
40 …

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Modular And Deployable Solution For Passing Hazardous Roads, Nicholas Short Apr 2022

Modular And Deployable Solution For Passing Hazardous Roads, Nicholas Short

LMU Theses and Dissertations

The developing world often relies on low-water crossings on unpaved roads in place of bridges for vehicle river crossings and impoverished communities suffer disproportionately more from road shut-downs. This project defines a modular and deployable bridge solution to combat low-water crossing hazards in undeveloped road systems in year-round conditions using Systems Engineering and related methodologies to architect the solution.

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Increasing Hydrogen Production In Electrolysis With A Magnetic Field, Laurie Battle Apr 2022

Increasing Hydrogen Production In Electrolysis With A Magnetic Field, Laurie Battle

Graduate Theses & Non-Theses

Hydrogen is an important energy carrier that has no carbon emissions when energy is extracted and also can be used as energy storage to increase the practicality of many renewable energy sources. The prominent methods of hydrogen production make use of fossil fuels, resulting in carbon emissions. Electrolysis is a lesser used technology for hydrogen production in which electricity splits water molecules into oxygen and hydrogen gases. If the electricity is sourced from renewable energies, this process releases little to no carbon and the resulting hydrogen is termed “green hydrogen.” While electrolysis and fossil fuel methods have comparable efficiencies of …

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Investigation Of The Structure, Chemistry And Functional Performance Of Novel Biochars, Julie Elizabeth Muretta Apr 2022

Investigation Of The Structure, Chemistry And Functional Performance Of Novel Biochars, Julie Elizabeth Muretta

Graduate Theses & Non-Theses

Biochars are a class of carbonaceous materials possessing high degrees of structural and chemical disorder in both organic and inorganic constituent phases. Despite this disorder, and in some cases because of this disorder, biochars have shown strong performance in adsorbing and even sequestering contaminants from soil, surface water and air. Biochar is the carbonaceous, solid product of heating carbonaceous feedstock in an oxygen-limited environment above 250°C, usually sourced from inexpensive, locally available agricultural and forestry wastes which can otherwise be difficult and expensive to dispose of. Biochar possesses attractive functional properties like high specific surface area, high micropore volume, and …

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In-Situ Generation Of Hydrocarbons From Kerogen Using Electromagnetic Radiation, Forrest Green Apr 2022

In-Situ Generation Of Hydrocarbons From Kerogen Using Electromagnetic Radiation, Forrest Green

Graduate Theses & Non-Theses

From using surface seeps to modern day exploitation of hydrocarbon source rocks, the petroleum industry is awaiting the next big innovation, accelerated kerogen conversion. In the industry’s history, electromagnetic radiation (EMR) has been used for exploration and now it will be taken to the extreme by determining an effective and efficient method to synthetically generate readily available hydrocarbons. The study starts with examining and defining what kerogen is and its importance as a source material. A strong understanding of what kerogen is, and an analysis of other in-situ projects presents an opportunity to study the finer details of kerogen’s conversion …

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Synthesis And Stabilization Of Gold Nanoparticles From Chloride And Cyanide Systems, Kathryn Ariela Bozer Apr 2022

Synthesis And Stabilization Of Gold Nanoparticles From Chloride And Cyanide Systems, Kathryn Ariela Bozer

Graduate Theses & Non-Theses

Generating gold nanoparticles (AuNPs) from gold chloride solution by precipitating with compounds can be difficult due to the potentially required high temperatures. Tin chloride can be used to overcome this dilemma. The process that is known to make Purple of Cassius is a method where gold chloride and tin chloride solutions are mixed to form AuNPs and tin oxide precipitate. However, it is modified by adding hydrazine to resolubilize the tin oxide and provide a more stable solution for the AuNPs. A three-factor central composite experimentally designed model was created using Design Expert incorporating pH, temperature, and gold concentration as …

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The Tempering Response Of Cpm® 3v Tool Steel Investigated Through Tensile Testing And Microstructural Observations, Stephen A.C. Hanson Apr 2022

The Tempering Response Of Cpm® 3v Tool Steel Investigated Through Tensile Testing And Microstructural Observations, Stephen A.C. Hanson

Graduate Theses & Non-Theses

Heat treatment, tensile testing failure analysis, and microstructural evaluation of the Crucible Industries tool steel CPM® 3V was undertaken to investigate CPM® 3V’s tempering response for the following samples: As-Hardened (no tempering); tempered at 450°C, 550°C, 650°C, and 700°C; and As-Received (annealed). CPM® 3V tool steel is manufactured by Crucible Industries using their proprietary Crucible Particle Metallurgy (CPM®) technology. This material was heat-treated at four different tempering temperatures and was evaluated for tensile properties according to ASTM E8. A TMS landmark tensile fixture was used to establish the ultimate tensile strength and the yield strength of the material for the …

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A Study Of The Integration Of Environment, Social, And Governance Policy In The Mining Industry, Ryan Isto Apr 2022

A Study Of The Integration Of Environment, Social, And Governance Policy In The Mining Industry, Ryan Isto

Graduate Theses & Non-Theses

In a push to reach more responsible and sustainable business practices, extractive resource industries like the mining and oil industry have faced increasing pressures to update their policies to reflect the global trend of improving environmental and social responsibility. Industries have adopted numerous corporate social responsibility (CSR) frameworks to shape policies to improve sustainability, mitigate risk, and increase marketability. A CSR that has become increasingly relevant within the mining industry is the use of environmental, social, and governance (ESG) to influence sustainability policy. Mining companies have adopted ESG as a method to influence their corporate policy to manage public relations, …

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Investigating The Possibility Of Using Smelted Water-Cooled Copper Slag Regolith As A Terrestrial Based Lunar Regolith Simulant, Scott A. Morley Apr 2022

Investigating The Possibility Of Using Smelted Water-Cooled Copper Slag Regolith As A Terrestrial Based Lunar Regolith Simulant, Scott A. Morley

Graduate Theses & Non-Theses

There is a need for a stable, efficient, and cost-effective option of a terrestrial lunar regolith simulant that can be easily made and at a lower cost to the consumer. A lunar regolith is the layer of unconsolidated rocky material covering bedrock that is on planets. All simulants fabricated for the moon, are based off three types of lunar regolith areas. The first is the lunar highlands which are the high areas of the moon, these areas are anthracitic. The second is lunar mare which is the meteoroid bombarded areas of the moon that look like dark grey areas from …

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Characterizing Hydrostratigraphic Communication Of The Semi-Consolidated Sediment Aquifers Of The Flathead Valley In Northwestern Montana Through Hydrogeophysical Surveys, Elizabeth Katherine Breitmeyer Apr 2022

Characterizing Hydrostratigraphic Communication Of The Semi-Consolidated Sediment Aquifers Of The Flathead Valley In Northwestern Montana Through Hydrogeophysical Surveys, Elizabeth Katherine Breitmeyer

Graduate Theses & Non-Theses

To accurately forecast the cascading effects of increased stress to a hydrologic system, characterization of the continuity and permeability of the primary confining layer (PCL) separating the shallow and deep intermontane alluvial aquifers is required. Geophysical methods provide a faster cost-effective alternative to drilling to acquire additional information on the changes of hydrostratigraphy with depth. Geoelectric resistivity models recovered through inversion of TEM central loop sounding data to delineate changes in geoelectric properties with depth, providing information on the depth, thickness and resistivity of the hydrostratigraphy. Comparison of geoelectric resistivity models with well completion report lithologies yield information about the …

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Treatment Of Mine Tailings Through Two Methods Of Calcite Precipitation: (I) Using Natural Mineral Trona, (Ii) Microbially Induced Calcite Precipitation Via Denitrification, Nathaniel Small Apr 2022

Treatment Of Mine Tailings Through Two Methods Of Calcite Precipitation: (I) Using Natural Mineral Trona, (Ii) Microbially Induced Calcite Precipitation Via Denitrification, Nathaniel Small

Graduate Theses & Non-Theses

Mine tailings not only pose environmental risks such as dust emission and acid mine drainage but also present geotechnical risks in cases of tailings dam failures which could lead to loss of human life and severe damages to infrastructure. In-situ cementation of tailings has the potential to reduce the risks associated with such failures as well as the related environmental problems. Over the years, different methods of chemically and microbially induced cementation of tailings have been examined many of which have shown promising results on a laboratory scale and some even on a ϐield scale. In this paper, a new …

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A Parallelizable Algorithm For Stabilizing Large Sparse Linear Systems With Uncertain Interconnections, Aleksandar Zečević, Maryam Khanbaghi Apr 2022

A Parallelizable Algorithm For Stabilizing Large Sparse Linear Systems With Uncertain Interconnections, Aleksandar Zečević, Maryam Khanbaghi

Electrical and Computer Engineering

This paper proposes a new method for permuting sparse matrices into an upper block triangular from. The algorithm is highly parallelizable, which makes it suitable for large-scale systems with uncertain interconnection patterns. In such cases, the proposed decomposition can be used to develop flexible decentralized control strategies that produce a different gain matrix whenever the configuration changes. Applications to interconnected microgrids and supply and demand networks are provided to illustrate the versatility of the proposed approach.

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Date-Leaf Carbon Particles For Green Enhanced Oil Recovery, Bashirul Haq, Md Abdul Aziz, Dhafer Al Shehri, Nasiru Salahu Muhammed, Shaik Inayath Basha, Abbas Saeed Hakeem, Mohammed Ameen Ahmed Qasem, Mohammed Lardhi, Stefan Iglauer Apr 2022

Date-Leaf Carbon Particles For Green Enhanced Oil Recovery, Bashirul Haq, Md Abdul Aziz, Dhafer Al Shehri, Nasiru Salahu Muhammed, Shaik Inayath Basha, Abbas Saeed Hakeem, Mohammed Ameen Ahmed Qasem, Mohammed Lardhi, Stefan Iglauer

Research outputs 2022 to 2026

Green enhanced oil recovery (GEOR) is an environmentally friendly enhanced oil recovery (EOR) process involving the injection of green fluids to improve macroscopic and microscopic sweep efficiencies while boosting tertiary oil production. Carbon nanomaterials such as graphene, carbon nanotube (CNT), and carbon dots have gained interest for their superior ability to increase oil recovery. These particles have been successfully tested in EOR, although they are expensive and do not extend to GEOR. In addition, the application of carbon particles in the GEOR method is not well understood yet, requiring thorough documentation. The goals of this work are to develop carbon …

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Design, Development, And Characterization Of Highly Efficient Colored Photovoltaic Module For Sustainable Buildings Applications, Mohammad Khairul Basher, Mohammad Nur-E-Alam, Momtazur Rahman, Steven Hinckley, Kamal Alameh Apr 2022

Design, Development, And Characterization Of Highly Efficient Colored Photovoltaic Module For Sustainable Buildings Applications, Mohammad Khairul Basher, Mohammad Nur-E-Alam, Momtazur Rahman, Steven Hinckley, Kamal Alameh

Research outputs 2022 to 2026

The building integrated photovoltaic (BIPV) system is one of the contributors which has enormous potential to reach the goal of net-zero energy buildings (NZEB) that significantly reduce the use of fossil fuels that contribute to global warming. However, the limitations of the visual and aesthetic appearance of current BIPV systems make this aspiration unlikely. This study investigates the limitations of the single-color-based PV modules that are dull in appearance and have low photo-conversion efficiency (PCE). In order to solve this issue, we designed, developed, and characterized micro-patterned-based multicolored photovoltaic (MPCPV) modules which are applicable to net-zero building and development. Our …

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Possible Storage Of Co₂ In Saline Aquifer: Storage Factor Estimation, Sarah Abdul Aziz Al-Tamimi Apr 2022

Possible Storage Of Co₂ In Saline Aquifer: Storage Factor Estimation, Sarah Abdul Aziz Al-Tamimi

Theses

The objective of this study is to perform laboratory measurements and a CO₂ underground storage study to cover the knowledge gap on CO₂-Brine relative permeability and assess various variables on the storage of CO₂ in a selected aquifer. Several factors that affect CO₂ storage have been discussed in the literature. These include both macroscopic and microscopic displacement efficiency of brine as a function of CO₂ pore volume injected. It is clear from the literature that there is still more work needed to investigate the effect of various variables such as formation temperature, brine viscosity, and the possible presence of free …

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Intelligent Toolpath Sequence Optimization Approach For Infinite Production Lines, Thanveer Ahammed Apr 2022

Intelligent Toolpath Sequence Optimization Approach For Infinite Production Lines, Thanveer Ahammed

Theses

This thesis is concerned with developing a new mathematical model and software for finding the optimal toolpath for an infinite machine production line system. Existing total production time estimation for the Computer Numerical Control (CNC) machining method is solved either on a single machine or in a single operation. The combination of airtime and tool switching time consumes most of the total production time, requiring multiple operations and multiple machine production line systems. A hybrid GA technique along with a modified TSP algorithm was used to find the minimal nonproductive time in these systems. This proposed mathematical model is coded …

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