Engineering Commons^™

Pvt-Tolerant Stochastic Time-To-Digital Converter, Khalil Jacob Gammoh

Theses and Dissertations

Time-to-digital converters (TDC) are widely used in light-detection-and-ranging (LIDAR) systems to measure the time-of-flight. Conventional TDCs are sensitivity to process, voltage, and temperature (PVT) variations. Recent work utilizing the stochastic delay-line TDC architecture has demonstrated excellent robustness against PVT variations. But important issues affecting the linearity of a stochastic delay-line TDC has yet to be recognized and addressed.This thesis rigorously analyzes the problem of linearity of a stochastic delay-line TDC and formulates an intuitive theory to predict the linearity performance. Apolarvisualization of the phase distribution of a delay line is proposed to aid the analysis. Based on the results of …

3d Printing For Microfluidics, Hua Gong

Theses and Dissertations

This dissertation focuses on developing 3D printing as a fabrication method for microfluidic devices. Specifically, I concentrate on the 3D printing approach known as Digital Light Processing stereolithography (DLP-SLA) in which serially projected images are used to sequentially photopolymerize layers to build a microfluidic device. The motivation for this work is to explore a much faster alternative to cleanroom-based microfabrication that additionally offers the opportunity to densely integrate microfluidic elements in compact 3D layouts for dramatic device volume reduction. In the course of my research, an optical approach was used to guide custom resin formulation to help create the interconnected …

Correlating Easily And Unobtrusively Queried Computer Characteristics To Number And Severity Of Vulnerabilities, Jonathan M. Mercado

Theses and Dissertations

Cybersecurity has become a top-of-mind concern as the threat landscape expands and organizations continue to undergo digital transformation. As the industry confronts this growth, tools designed to evaluate the security posture of a network must improve to provide better value. Current agent-based and network scanning tools are resource intensive, expensive, and require thorough testing before implementation in order to ensure seamless integration. While surfacing specific vulnerability information is imperative to securing network assets, there are ways to predict the security status of a network without taking exact measurements. These methods may inform security professionals as to where the weakest points …

Modeling Soot Formation Derived From Solid Fuels, Alexander Jon Josephson

Theses and Dissertations

Soot formation from complex solid fuels, such as coal or biomass, is an under-studied and little understood phenomena which has profound physical effects. Any time a solid fuel is combusted, from coal-burning power plants to wildland fires, soot formation within the flame can have a significant influence on combustion characteristics such as temperature, heat flux, and chemical profiles. If emitted from the flame, soot particles have long-last effects on human health and the environment. The work in this dissertation focuses on creating and implementing computational models to be used for predicting soot mechanisms in a combustion environment. Three models are …

Vision-Based Emergency Landing Of Small Unmanned Aircraft Systems, Parker Chase Lusk

Theses and Dissertations

Emergency landing is a critical safety mechanism for aerial vehicles. Commercial aircraft have triply-redundant systems that greatly increase the probability that the pilot will be able to land the aircraft at a designated airfield in the event of an emergency. In general aviation, the chances of always reaching a designated airfield are lower, but the successful pilot might use landmarks and other visual information to safely land in unprepared locations. For small unmanned aircraft systems (sUAS), triply- or even doubly-redundant systems are unlikely due to size, weight, and power constraints. Additionally, there is a growing demand for beyond visual line …

Comparing Specific Excess Power Of General Aviation Aircraft, Yohan Forbes Auguste

Theses and Dissertations

The high number of Loss of Control and Controlled Flight into Terrain Accidents in General Aviation (GA) suggests that there is a lack of understanding and recognition of low energy states by pilots of GA aircraft. As a result there is a desire to implement an energy management system in GA aircraft to alert the pilot of low energy conditions and to give the required corrective action to get to a desired energy state. This requires an understanding of the performance capabilities of GA aircraft in terms of their ability to change their energy state. The ability to change the …

Holistic Approach For Characterizing The Performance Of Wireless Sensor Networks, Amar Yusof Jaffar

Theses and Dissertations

Researchers are actively investigating wireless sensor networks (WSNs) with respect to node design, architecture, networking protocols, and processing algorithms. However, few researchers consider the impact of deployments on the performance of a system. As a result, an appropriate deployment simulator that estimates the performance of WSNs concerning several deployment variables is needed. This research presents a holistic deployment framework that assists decision makers in making optimum WSN deployment choices by considering the terrain of their region of interest and type of deployment. This framework employs empirical propagation models to predict the performance of the deployment in terms of connectivity, coverage, …

An Experiment To Study The Gaseous Emissions Of A Gas Turbine Operated With Biodiesel As Fuel, David Lee Rochelle

Theses and Dissertations

A continually growing awareness of the finiteness of fossil fuel availability coupled with an ever better understanding of the negative effects of fossil fuel consumption has motivated a search for fuels that can be used in place of fossil fuels, but which can be derived from sustainable sources such as growable organic matter. While much work has been done to understand these substances and apply them on a larger scale (indeed, biodiesel is commonly included in commercially available diesel fuels at fuel pumps); the unique nature of the operating environment for aviation fuels has complicated the application of these substances …

Real-Time Facial Expression And Speech Emotion Recognition App Development On Mobile Phones Using Cloud Computing, Humaid Saif Saeed Alasli Alshamsi

Theses and Dissertations

Emotion plays a vital role in humans’ daily lives. Understanding emotions and recognizing how to react to others’ feelings are fundamental to engaging in successful social interactions. Emotion recognition through facial expression and speech play a significant role in human communication. This subject is becoming important in academic research as new techniques such as emotion recognition from speech context inspire us to recognize how emotions are related to the content we are uttering. The demand and importance of emotion recognition have highly increased in many applications in recent years, such as video games, human-computer interactions, cognitive computing, and affective computing. …

The Fabrication And Characterization Of Cu(In,Ga)Se2 Solar Cell, Yasir Al-Rikabi

Theses and Dissertations

The extremely large energy consumption rate on Earth today is likely to exhaust the conventional energy resources such as fossil fuels and coal in the near future. The need for new renewable energy sources becomes inevitable and urgent. Among various new energy resources, solar energy is the most promising one because it is abundant and environmentally clean. The Sun light can be converted into electricity by using solar cell devices. Even though the solar cell panels made of thin films are in competition with conventional single crystal solar cells, only four thin film solar cells, i.e. amorphous silicon (a- Si), …

High Performance Glad Nanorod Cuinxga(1-X)Se2 Arrays With Enhanced Carrier Collection And Light Trapping For Photodetector Applications, Matthew P. Brozak

Theses and Dissertations

Nanostructured arrays have become an appealing alternative to their thin film and bulk counterparts in photovoltaic and photoconductivity applications. Thin films have recently continued the evolution of efficiency and material sciences after taking over from traditional, doped silicon devices. Inside of the thin film revolution, CuInxGa(1-x)Se2 (CIGS) has emerged as a high efficiency p-type semiconductor with a wide band gap that is tunable based on the Indium to Gallium ratio and often deposited via expensive, high temperature deposition methods. While each of the aforementioned methods of construction have their disadvantages, the advantages of each can be combined to potentially increase …

Komunikimi Wireless Dhe Menaxhimi I Smart Grid, Kreshnik Gashi

Theses and Dissertations

Ekziston një përpjekje ndërkombëtare për të zhvilluar rrjetet e mençura për të kapërcyer problemet e shkaktuara nga rrjetet e energjisë në plakje. Megjithatë, për të emigruar në rrjetin e ri, infrastruktura e IT duhet të integrohet me rrjetin aktual të energjisë. Tani ekziston një debat i vazhdueshëm rreth asaj se cila do të ishte zgjidhja më e mirë për teknologjinë e komunikimit të zgjuar të rrjetit. Një nga teknologjitë premtuese të komunikimit për realizimin e rrjetit të zgjuar është komunikimi me energji elektrike (PLC). PLC u ofron ndërmarrjeve mundësinë për të menaxhuar infrastrukturën e tyre të rrjetit. Kabllot e energjisë …

Menaxhimi Dhe Organizimi I Punishtes (Kompleksi Valoni), Ilir Jusufi

Theses and Dissertations

Pasi që gjendja aktuale në fushën e menaxhimit dhe organizimit nuk është në nivelin e duhur dhe aksidentet në fushën e ndërtimtarisë vazhdojnë të rriten si dhe kemi mungesë të hulumtimit nga kjo fushë në Kosovë. Qëllimi kryesor i këtij studimi është që në një të ardhme të afërt të kontriboj në këtë degë të ndërtimtarisë, pasi në Kosovë ende një numër i madh i njerëzve nuk e kanë kuptuar rëndësinë e menaxhimit dhe organizimit në hapësira ku punohet, e cila lidhet në mënyrë direkte me sigurinë e jetës së njeriut. Duhet të kuptohet që në çdo kompani ndërtimore, primare …

Kontrolli I Cilësisë Së Betonit Në Punishte (Kantierin E Ndërtimit) Nga Faza E Prodhimi Deri Në Fazën E Ndërtimit, Albert Hajdari

Theses and Dissertations

Qellimi i kesaj teme eshte qe te rrisim cilsin e betoneve,para se te egzekutohen ne punishte,te kemi komformitete te betonit.

Arsyja pse kam zgjedh kete temë esht se ne Kosovë mungon certefikata e komformiteteve,ku cdo ekzekutues duhet ta ketë certefikateten e komformitetit.

Ku ligji ndalon perdorimin-vuarja ne veper e produktit ndertimor ne objektin e ndertimit,eshte i obliguar te i permbahet kesaj rregullore.

Nuk lejohet pa udhezime teknike per punim dhe perdorim,nuk ka karakteristika sipas kerkesave te projektit ose u ka kaluar afati i perdorimit,perkatsisht te dhenat e rendesishme per punimet.

Mirmbajtaja e betonit dhe konstruksionit te betonit duhet te jetë …

Pllakat Kaseton, Adelina Elezi

Theses and Dissertations

Ky punim prezanton zgjidhjen arkitektonike,përvetsimin dhe dimensionimin e konstruksionit meskator të tipit kaseton,ku materiali projektues është nga betonarmeja e llojit C-30/37, ndërsa destinimi i objektit është për mbatjen e panaireve të ndryshme.Punimi është i ndarë në disa pjesë kryesore si: shqyrtimi i literaturës, deklarimi i problemit, metodologjia, analiza dhe prezantimi i rezultateve. Planimetria është e ndarë në trarëza në drejtimin x = (10 *1.2 ) kurse përgjatë drejtimit y = (10*1.4). Për zgjidhjen e detyrës së pari është filluar me caktimin e karakteristikave të materialit si vlera llogaritëse dhe caktimin e karakteristikave gjeometrike (caktimi i hapsirës statike, kontrollimin i punushmerisë …

Trarët Me Lartësi Të Ndryshuar, Edona Zeneli

Theses and Dissertations

Motivi për këtë hulumtim bazohet në cilësitë pozitive të drurit të laminuar si material ndërtimor. Dru i laminuar, i quajtur gjithashtu glulam, është një lloj produkti strukturor strukturor druri i përbërë nga një numër shtresash të drurit dimensional të lidhura së bashku me ngjitëse strukturore rezistente ndaj lagështirës.

Duke laminuar një numër të copave të vogla lëndë drusore, një pjesë e vetme e madhe, e fortë, strukturore prodhohet nga pjesë të vogla. Këto elementë strukturorë përdoren si kolona vertikale ose trare horizontale, si dhe forma të harkta, të harkuara. Glulam prodhohet lehtë në forma të lakuara dhe është i disponueshëm …

Markimi Ce, Endrit Krasniqi

Theses and Dissertations

Jo të gjithë prodhuesit janë të vetëdijshëm për përgjegjësitë e tyre dhe jo të gjithë blerësit janë të vetëdijshëm për kuptimin e vërtetë të markimit CE. Është me rëndësi jetike të kuptohet qëllimi i rregulloreve, rëndësia e përmbushjes së këtyre rregulloreve dhe udhëzimeve të prodhuesit, roli i sistemeve të cilësisë në procesin e pajtueshmërisë dhe vendimet që mund të merren nga prodhuesi.

Markimi CE harmonizon legjislacionin për sigurinë e produktit duke krijuar kërkesat themelore të sigurisë ligjore dhe standardet vullnetare të specifikimeve teknike. Për të marrë shenjën CE mbi një produkt, prodhuesi duhet të ecë përmes një trajektoreje dhe të …

Elementet Nga Betoni I Parafabrikuar, Llogaritja Preliminare E Një Nënkalimi, Alban Hajdari

Theses and Dissertations

Qellimi I kesaj teme eshte te tregoje rreth perpunimit dhe shfrytezimit te betonit te parafabrikuar. Po ashtu te tregoje avantazhet, perfitimet, menyren e pergatitjes, montimit ne vendpunishte, lidhjeve te pjeseve te betonit, ekzekutimin e tyre ne vendpunishte ne varesi te pozicionit qe shfrytezohet ne object, shtrirjen ose perhapjen e tij ne tregun e sotem te ndertimit, aplikueshmeria e tij në Kosovë. Përshkruan vetitë e perbëresve të betonit të parafabrikuar si: cimento, agregatin dhe ujin. Ky punim perbehet nga 6 kapituj. Kapitulli I pare tregon për historikun e elementeve të parafabrikuara, po ashtu edhe vetit e përbërseve të betonit si cimenton, …

Ekzaminimi I Shufrave Në Tërheqje Për Beton Sipas Eurokodit En 10002-1:2001, Qendrim Gecaj

Theses and Dissertations

Qëllimi i kësaj teme është të bëj një hulumtim rreth ekzaminimit te shufrave perbeton sipas kodit EN 10002-1:2001. Shtjellimin e vet eurokodit dhe procedurave që po ashtu duhet të përdoren gjatë ekzaminimit që të tregojnë mënyren e përgaditjes së shufrave me dimensione te caktuara, matjen e dimensioneve të tyre dhe të dhënave të ndryshme të mostrave, mënyren e testimit me aparaturë, leximin e rezulltateve të përfituara nga aparatura, përfitimin e rezultateve specifike dhe të pergjithshme nga kërkesat e caktuara sipas EN 10002-1:2001.

Dyshemetë Nga Rrëshirat Epokside, Fatmir Rexhepi

Theses and Dissertations

Ndërtimtaria është veprimtari specifike që ka për synim ngritjen dhe rikonstruktimin e objekteve ndërtimore. Si veprimtari, ajo realizon produktin e caktuar i cili është pjesë e proceseve të shumta zingjirore ndërtuese. Tematikë e këtij punimi janë dyshemetë nga rrëshirat ekpokside. Ky proces ndërtimorë trajton dyshemetë e mbuluara nga ky material i cili rritë performancën dhe funksionalitetitn e objektit. Pjesë e këtij studimi janë vetitë e epoksidit si materiali dhe kërkesat që duhet ti plotësojë.Gjithashtu ky punim shqyrton vuarjen në vepër dhe ndikimin e tij në jetëgjatësinë e betonit.

Në përgjithësi hulumtim prezanton arsyeshmërinë e përdorimit te epoksideve në dyshemetë industriale …

Analiza Dhe Projekti Ideor Ne Qytetin E Therandes, Vjollca Hoxha

Theses and Dissertations

Me rritjen e nivelit te modernizimit është rritur edhe nevoja e transportit si dhe arritja me e shpejt ne destinacjon e popullatës qe ka krijuar nevojën e udhëtimit me te sigurt si te udhetarve me automjete ashtu edhe e kembesoreve, nga kjo eshte linde nevoja qe transporti te behet me komod. Qarkullimi urban ka arriturr ne shkallen e nje pershpejtimi qe shkakton uljen e siguris se qarkullimit si dhe ben ndotjen e ajrrit dhe shkaktimin e zhurmave te mëdha.

Lidhshmërija në mes të kërkeses së transportit dhe kerkesave te natyrave te ndryshme ka rrite nevojen e hapsirave të ndryshme urbane …

Menaxhimi Dhe Organizimi I Punishtes, Raif Fejza

Theses and Dissertations

Qëllimi i këtij punimi është rritja e cilësisë dhe efektivitetit të proceseve të menaxhimit, monitorimit dhe kontrollit të projekteve inxhinierike, duke paraqitur një model të avancuar për llogaritjen e performancës së tyre. Integrimi dhe ndërthurja e koncepteve matematikore, ekonomike dhe inxhinierike, për vlerësimin e avancimit fizik të projektit, lëvizjes së flukseve monetare, shpërndarjes të burimeve të nevojshme dhe llogaritjes të afateve kohore, mund të konsiderohet si niveli më i lartë i menaxhimit dhe kontrollit të projekteve inxhinierike.

Nga studimi i menaxhimit te ndertimit ne Kosove, mund te perfundohet se kjo veprimtari te ne duhet te zhvillohet shume me teper ne …

Coordinated, Multi-Arm Manipulation With Soft Robots, Dustan Paul Kraus

Theses and Dissertations

Soft lightweight robots provide an inherently safe solution to using robots in unmodeled environments by maintaining safety without increasing cost through expensive sensors. Unfortunately, many practical problems still need to be addressed before soft robots can become useful in real world tasks. Unlike traditional robots, soft robot geometry is not constant but can change with deflation and reinflation. Small errors in a robot's kinematic model can result in large errors in pose estimation of the end effector. This error, coupled with the inherent compliance of soft robots and the difficulty of soft robot joint angle sensing, makes it very challenging …

Thermochemical Conversion Of Biomass: Detailed Gasification And Near-Burner Co-Firing Measurements, Jacob B. Beutler

Theses and Dissertations

An increasing emphasis on mitigating global climate change (global warming) over the last few decades has created interest in a broad range of sustainable or alternative energy systems to replace fossil fuel combustion. Biomass, when harvested responsibly, is a renewable fuel with many uses in replacing fossil fuels. Cofiring biomass with coal in traditional large-scale coal power plants represents one of the lowest risk, least costly, near-term methods of CO₂ mitigation. Simultaneously, it is one of the most efficient and inexpensive uses of biomass. Alternatively, biomass can be transformed into useful products through gasification to produce clean syngas for …

Ku-Band Ag Channel Modeling, Albert Smith

Theses and Dissertations

With the rise in use of Unmanned Aerial Systems (UAS), there is a need for safe and reliable integration into existing infrastructure. A proposed system for beyond line of sight control links for UAS is a Ku-band air-to-satellite communication system. To ensure this proposed system does not interfere with existing terrestrial infrastructure that operates in the Ku band, an examination of the Ku-band air-to-ground channel is required. The focus of this thesis is the modeling of the Ku-band AG channel. Tests consisting of transmitting a single tone continuous wave signal were conducted with a signal generator onboard NASA’s Viking S-3 …

Numerical Modeling Of Submarine Minibasin Flow And Morphodynamics, Elena Bastianon

Theses and Dissertations

Intraslope basins, or minibasins, are important morphological features of the continental slope in both modern and ancient sedimentary systems. Minibasins have an elliptical or spherical shape with a steep inlet or proximal zone followed by an almost horizontal basin floor, and an overflow zone near the downstream basin lip. These basins are filled with sediment transported by successive events of turbidity currents and other types of submarine flows. The work presented here focuses on turbidity current sedimentation in intraslope minibasins, which is often described in terms of the ‘fill-and- spill’ conceptual model. The ‘fill-and-spill’ model has been used previously to …

Exploring Machine Learning Techniques To Improve Peptide Identification, Fawad Kirmani

Theses and Dissertations

The goal of this work is to improve proteotypic peptide prediction with lower pro- cessing time and better efficiency. Proteotypic peptides are the peptides in protein sequence that can be confidently observed by mass-spectrometry based proteomics. One of the widely used method for identifying peptides is tandem mass spectrometry (MS/MS). The peptides that need to be identified are compared with the accurate mass and elution time (AMT) tag database. The AMT tag database helps in reducing the processing time and increases the accuracy of the identified peptides. Prediction of proteotypic peptides has seen a rapid improvement in recent years for …

Characterization Of The Spatial And Temporal Changes In River Geometry And Sand Load With Field Data Analysis And 1d Numerical Modeling, Zeyad Ayoob Sulaiman

Theses and Dissertations

The quantification of the changes in channel geometry and sand load that have occurred on the Missouri River after engineering works and that characterize the Altamaha River in the fluvial-tidal transition zone is the main objective of this research. Dam construction and channelization on the Missouri River resulted in flow regulation, sediment shortage by dam reservoir trapping, channel straightening and narrowing. Quantifying the morphodynamic response of the Lower Missouri River to these engineering projects at short and long-time scales is a difficult problem that we approach with the analysis of the available field data and with the aid of a …

Turning Up Antitumor Immunity Against Breast Cancer, Johnie Hodge

Theses and Dissertations

Breast cancer is the most common cancer in women worldwide, and is the second leading cause of cancer-related death in spite of significant advances in treatment and emphasis on early diagnosis. While treatment of localized disease is often successful, metastatic breast cancer, especially of the triple negative molecular subtype, carries a much poorer prognosis. The significant role of the immune system in the progression from localized to metastatic disease is becoming more and more appreciated. Tumor escape from immune surveillance and immune suppression in the tumor microenvironment have become therapeutic targets in addition to the traditional goals of directly killing …

Topological Conduction And Investigation On Multi Occurrence Of Dirac Cone, Mustahseen Mobashwer Indaleeb

Theses and Dissertations

The unique phenomena in acoustic metamaterial at the Dirac-like cone, and at the exceptional spawning ring could transform the field of engineering with multiple new applications that were never possible before. Localized conical dispersion called Dirac cone at the Brillouin Zone boundaries are the well-known phenomena demonstrated by photonics and phononic metamaterials. However, Dirac cone-like dispersion at the center of the Brillouin zone (where wave number, k = 0) [1] is rare and only happens due to accidental degeneracy at finite frequencies in two-dimensional periodic crystals (PCs), with or without microarchitectures. Accidental degeneracies are generally the ‘sweet spots’ where the …