Engineering Commons^™

The Influence Of Trailing Edge Shape And Kinematics On Bio-Inspired Pitching Panels, Justin Thomas King

Dissertations - ALL

Recently, some engineers have turned to the study of swimming and flying animals to provide insight into the design of vehicles that move through air or water. For certain animals swimming in water, thrust is generated primarily by either a caudal fin or fluke located at the posterior end of the swimmer. It has been argued extensively in the existing research literature that biological propulsors of high aspect ration that also display forked, or lunate, planforms are representative of optimized propulsor geometries with respect to propulsive performance. However, recent experimental and computational work on purely pitching panels has demonstrated that …

Flow Interaction Between Turbomachine Blade Row And Flow Resistance Medium, Tong Lin

Dissertations - ALL

This research investigates the fluid-dynamic interaction between close-coupled axial turbomachines and surrounding components, e.g., heat-exchangers, filters, or cooling fins in high-density computer servers, and its effects on turbomachine and system performance. The importance of this research is that the flow interaction effect occurs in every scenario that requires system compactness.

Firstly, a combined experimental and 3-D computational study on an off-the-shelf server cooling fan is performed, showing that the fan performance has little changed. However, the system performance can be very different since the server cooling has a large hub-to-tip radius ratio, which effectively blocks the high resistance media's (HRM) …

High Depth-Of-Discharge Zinc Rechargeability Enabled By A Self-Assembled Polymeric Coating, David J. Arnot, Matthew B. Lim, Nelson S. Bell, Noah B. Schorr, Ryan C. Hill, Andrew Meyer, Yang-Tse Cheng, Timothy N. Lambert

Chemical and Materials Engineering Faculty Publications

Zinc has the potential for widespread use as an environmentally friendly and cost-effective anode material pending the resolution of rechargeability issues caused by active material loss and shape change. Here, a self-assembled Nafion-coated Celgard 3501 (NC-Celgard) separator is shown to enable unprecedented cycle life of a Zn anode in alkaline electrolyte at high depth-of-discharge (DOD_Zn). Using commercially relevant energy-dense electrodes with high areal capacities of 60 mAh cm^–2, Zn–Ni cells tested at 20% DOD_Zn cells achieve over 200 cycles while 50% DOD_Zn cells achieve over 100 cycles before failure. The 20% and 50% DOD …

Trihalomethanes In Water Supply System And Water Distribution Networks, Sornsiri Sriboonnak, Phacharapol Induvesa, Suraphong Wattanachira, Pharkphum Rakruam, Adisak Siyasukh, Chayakorn Pumas, Aunnop Wongrueng, Eakalak Khan

Civil and Environmental Engineering and Construction Faculty Research

The formation of trihalomethanes (THMs) in natural and treated water from water supply systems is an urgent research area due to the carcinogenic risk they pose. Seasonal effects and pH have captured interest as potential factors affecting THM formation in the water supply and distribution systems. We investigated THM occurrence in the water supply chain, including raw and treated water from water treatment plants (coagulation, sedimentation, sand filtration, ClO2-disinfection processes, and distribution pipelines) in the Chiang Mai municipality, particularly the educational institute area. The effects of two seasons, rainy (September–November 2019) and dry (December 2019–February 2020), acted as surrogates for …

Blood–Brain Barrier Breakdown And Astrocyte Reactivity Evident In The Absence Of Behavioral Changes After Repeated Traumatic Brain Injury, Celeste Dunn, Nasya Sturdivant, Sara Venier, Syed Ali, Jeffery Wolchok, Kartik Balachandran

Biomedical Engineering Faculty Publications and Presentations

Repeated traumatic brain injuries (TBIs) cause debilitating effects. Without understanding the acute effects of repeated TBIs, treatment options to halt further degeneration and damage cannot be developed. This study sought to examine the acute effects of blood–brain barrier (BBB) dysfunction, edema, inflammation and behavioral changes after either a single or double TBI using a C57BL/6 mouse model. We examined the effects of one or two TBIs, of either a mild or moderate severity. Double injuries were spaced 7 days apart, and all analysis was performed 24 h post-injury. To examine edema and inflammation, protein levels of glial fibrillary acidic protein …

Some New Results In Distributed Tracking And Optimization, Pranay Sharma

Dissertations - ALL

The current age of Big Data is built on the foundation of distributed systems, and efficient distributed algorithms to run on these systems.With the rapid increase in the volume of the data being fed into these systems, storing and processing all this data at a central location becomes infeasible. Such a central \textit{server} requires a gigantic amount of computational and storage resources. Even when it is possible to have central servers, it is not always desirable, due to privacy concerns. Also, sending huge amounts of data to such servers incur often infeasible bandwidth requirements.

In this dissertation, we consider two …

Data-Driven Protection Of Transformers, Phase Angle Regulators, And Transmission Lines In Interconnected Power Systems, Pallav Kumar Bera

Dissertations - ALL

This dissertation highlights the growing interest in and adoption of machine learning approaches for fault detection in modern electric power grids. Once a fault has occurred, it must be identified quickly and a variety of preventative steps must be taken to remove or insulate it. As a result, detecting, locating, and classifying faults early and accurately can improve safety and dependability while reducing downtime and hardware damage. Machine learning-based solutions and tools to carry out effective data processing and analysis to aid power system operations and decision-making are becoming preeminent with better system condition awareness and data availability.

Power transformers, …

Molecular Interfaces And Heterogeneous Bubble Nucleation From Heated Surfaces At Nanoscale, Manish Gupta

Dissertations - ALL

Heat transfer from a solid surface to fluid occurs in numerous applications, such as boilers, refrigerators, power electronics, etc., and include various underlying phenomena of thin-film evaporation, boiling, condensation, surface wetting, and droplet evaporation. Several studies show that heat transfer can be enhanced significantly by incorporating micro and nanoscale features onto surfaces. Phase change heat transfer plays an important role in dissipating energy from hot surfaces and distributing it to bulk liquid due to high latent heat of liquids. Boiling, a phase change heat transfer phenomenon, happens when the surface is heated to a temperature above the saturation temperature of …

Design And Development Of 2d Functional Semiconductor Nanocrystals, Andrew Hunter Davis

Dissertations - ALL

Anisotropic nanocrystals (NCs) have become of keen interest in recent years, especially for applications in optoelectronic devices due to their directionally oriented emissions, narrow emission spectra, and suitable morphologies for device integration. Of the desired anisotropic NCs, two-dimensional (2D) NCs are of profound interest, due to their impressive optical and electronic properties as well as their prospective advantages towards applications in layered optoelectronic devices, such as solar cells. However, 2D NCs face many challenges, including limited synthetic derivation, as well as decreased stability and optical response, due to their large surface-to-volume ratio and reactive planar surface increasing surface defect state …

Digital Construction And Bim Research In Ireland 2016-2020, Barry Mcauley, Roger P. West, Alan V. Hore

Conference papers

As the construction industry opens up post pandemic, new and significant challenges will demand considerable expertise, not least in financial viability, solving the housing crisis and facing the very significant climate change pressures to make the industry less wasteful and less carbon intensive. This presents an excellent opportunity to further inculcate aspects of lean construction, particularly BIM into many aspects of construction not traditionally associated with digital construction, provided the necessary expertise is available and known to exist. Following a well-received recent conference paper summarising BIM-related research published by academics in Ireland’s higher education institutions in 2020, this paper will …

Travel Demand Forecasting To Predict Parking Behavior At University Campuses: A Case Study At The University Of Texas At Tyler, Sohil Paudel

Civil Engineering Theses

With limited capacity, space, and funds to expand parking facilities, there is a dire need to better understand parking behavior at university campuses so that universities can better utilize the limited resources available. One methodology, travel demand forecasting, could be used to predict parking demand at a university campus. For this study, the University of Texas at Tyler campus was used as a case study. Each parking lot on campus was assigned to one parking zone based on the nearest classroom building. Next, pneumatic tube counters were used to collect the number of originating and departing vehicles from each zone. …

Rerearch On Impact Of Covid-19 On Chinese International Shipping Companies And Countermeasures Der The Promotion Of Government, Xiaoru Dong

World Maritime University Dissertations

No abstract provided.

Cfd Analysis Of Subcutaneous Deposition And Dispersion Of Insulin In Adipose Tissue, Ryan C. Lubbers

Masters Theses

Drug delivery is the most important factor of many therapies, but a lack of technology and research have led to a very generalized understanding of drug kinetics. Insulin pump therapy for the treatment of Type 1 Diabetes depends on precise delivery of the hormone into the adipose region between the dermis and underlying muscle. The kinetics of insulin within the adipose tissue environment is not well understood and varies greatly case to case. The use of computation fluid dynamics (CFD) models to study insulin kinetics in relation to influential factors will lead to a better understanding of the characteristics of …

Application Of Net-Centric Communications For Disasters (Panel 1: First Responder), Norman Jones

Online Journal of Space Communication

Norman Jones, Transformational Communications Engineering presents: Application of Net-Centric Communications for Disasters

White Paper On Emergency Communications, Space And Advanced Communications Research Institute Space And Advanced Communications Research Institute

Online Journal of Space Communication

Prepared by the Space & Advanced Communications Research Institute (SACRI)

George Washington University

January 5, 2006

Note: This White Paper draws a number of sources including presentations at the National Conference on Emergency Communications (NCEC) held at the George Washington University on December 12-13, 2005. This conference featured some thirty different speakers selected from the federal as well as state and local governments, a wide range of industry spokespeople, several professional societies, relief organizations and NGOs, universities, and other interested parties. There were thirty different sponsors. These presentations, the attendees at this conference and the many sponsors of this event …

Issue 10: From The Guest Editors, Joseph Pelton, Neil Helm

Online Journal of Space Communication

Issue 10 introduction from the guest editors.

Multiple Uav Adaptive Navigation For Three-Dimensional Scalar Fields, Robert K. Lee, Christopher A. Kitts, Michael A. Neumann, Robert T. Mcdonald

Mechanical Engineering

Adaptive Navigation (AN) control strategies allow an agent to autonomously alter its trajectory based on realtime measurements of the environment. Compared to conventional navigation methods, these techniques can reduce required time and energy to explore scalar characteristics of unknown and dynamic regions of interest (e.g., temperature, concentration level). Multiple Uncrewed Aerial Vehicle (UAV) approaches to AN can improve performance by exploiting synchronized spatially-dispersed measurements to generate realtime information regarding the structure of the local scalar field, which is then used to inform navigation decisions. This article presents initial results of a comprehensive program to develop, verify, and experimentally implement mission-level …

The Battalion Commander Effect, Everett Spain, Gautam Mukunda, Archie Bates

The US Army War College Quarterly: Parameters

Statistical evidence suggests Army battalion commanders are significant determinants of the retention of their lieutenants—especially high-potential lieutenants. Further, this so-called Battalion Commander Effect should be included in brigadier general promotion board assessments and used to inform officer professional military education curricula.

Experimental Study On Advanced Real Time Detection System Of Seismic-While-Excavating, Wang Ji, Qin Si, Wu Hai, Zhang Qingqing, Yu Junhui, Su Xiaoyun

Coal Geology & Exploration

Experimental study on advanced real time detection system of seismic-while-excavating

Three-Component Seismic Data Acquisition System Of Coal Mine Based On Mems And Lwip, Wang Huaixiu, Qiu Shuai, Zhu Guowei, Chen Bo

Coal Geology & Exploration

Three-component seismic data acquisition system of coal mine based on MEMS and LwIP

Depth Correction Technique Of Electrical Marker Based On Electrical Field Component Of Csamt, Liu Zuiliang, Zhang Fenxuan, Zhang Jifeng, Zhou Guangyu, Zhao Hui, Zhang Xin

Coal Geology & Exploration

Depth correction technique of electrical marker based on electrical field component of CSAMT

Evaluation On The Resolution Ability Of Underground Transient Electromagnetic Instrument To Disaster-Causing Water Bodies, Zhao Zhongnan, Xu Yangcheng, Wu Yanqing, Tan Qingqing, Kang Yueming, Wang Yao

Coal Geology & Exploration

Evaluation on the resolution ability of underground transient electromagnetic instrument to disaster-causing water bodies

Research Status And Prospect Of Fault Activation Under Coal Mining Conditions, Tian Yutong, Zhang Pingsong, Wu Rongxin, Liu Chang

Coal Geology & Exploration

Research status and prospect of fault activation under coal mining conditions

Key Problems And Countermeasures Of Cbm Development Through Surface Boreholes In Abandoned Coal Mines Of Shanxi Province, Wang Zheng, Li Guofu, Zhou Xianjun, Hu Shengyong, Li Rifu, Chen Wenke, Jiao Pengshuai, Li Chao, Li Jiangbiao

Coal Geology & Exploration

Key problems and countermeasures of CBM development through surface boreholes in abandoned coal mines of Shanxi Province

Technology Of Across-Goaf Drainage Of Coalbed Methane From A Lower Coal Seam Group And Its Primary Application: Taking Sihe Mine Field As An Example, Li Junjun, Li Guofu, Hao Haijin, Hao Chunsheng, Wang Zheng

Coal Geology & Exploration

Technology of across-goaf drainage of coalbed methane from a lower coal seam group and its primary application: Taking Sihe mine field as an example

Coal Body Structure Identification By Logging Based On Coal Accumulation Environment Zoning And Its Application In Mabidong Block, Qinshui Basin, Zhang Jianguo, Han Sheng, Zhang Cong, Chen Yanjun

Coal Geology & Exploration

Coal body structure identification by logging based on coal accumulation environment zoning and its application in Mabidong Block, Qinshui Basin

Sequence Stratigraphy And Coal Accumulation Of Barrier Coastal System Under Epicontinental-Sea Environment: A Case Study Of The Late Paleozoic Taiyuan Formation In Bohai Bay Area, Chang Jia, Chen Shiyue, Wang Qiong, Pu Xiugang, Yang Huaiyu

Coal Geology & Exploration

Sequence stratigraphy and coal accumulation of barrier coastal system under epicontinental-sea environment: A case study of the Late Paleozoic Taiyuan Formation in Bohai Bay Area

Distribution Characteristics Of Heavy Minerals In The Sandstone Of Zhiluo Formation Of Northern Ordos Basin And Its Implication, Zhang Yuanyuan, Zhang Pengfei, Nie Fengjun, Yan Pengbing, Zhang Zhibo, Yan Zhaobin, Zhang Xin

Coal Geology & Exploration

Distribution characteristics of heavy minerals in the sandstone of Zhiluo Formation of northern Ordos Basin and its implication

Mechanism And Applicability Of Increasing Coalbed Methane Well Production By Pre-Positioned Acid Fracturing, Fan Yao

Coal Geology & Exploration

Mechanism and applicability of increasing coalbed methane well production by pre-positioned acid fracturing

Effects Of Different Combined Pretreatments On Biogenic Methane Production By Anaerobic Digestion Of Lignite, Zhang Huaiwen, Yao Yiqing, Xie Changwen

Coal Geology & Exploration

Effects of different combined pretreatments on biogenic methane production by anaerobic digestion of lignite