Digital Commons Network^™

Numerical Wave Tank Study Of Extreme Waves And Wave-Structure Interaction Using Openfoam®, Zheng Zheng Hu, Deborah Greaves, Alison Raby

School of Engineering, Computing and Mathematics

No abstract provided.

A Design Methodology For Side Wall Failure Of Rhs Truss X-Joints Accounting For Compressive Chord Pre-Load, Shanshan Cheng, Jurgen Becque

School of Engineering, Computing and Mathematics

This paper presents a design methodology for equal-width RHS X-joints failing by side wall buckling, with a particular focus on the effect of a compressive chord pre-load. A slenderness parameter is thereby defined based on the elastic local buckling stress of the side wall, idealized as an infinitely long plate under a patch loading transferred from the brace member in combination with a uniform chord pre-load. A Rayleigh-Ritz approximation is used to obtain a closed form solution. The proposed design equation is verified against finite element results over a wide range of wall slenderness values and is demonstrated to yield …

Private Sector Emiratization: Evaluating The Policies And Practices Designed To Achieve Abu Dhabi's Strategic Hrm Goal, Khaled Sultan Saeed Ai Kaabi

Dissertations

The purpose of this study is two-fold: firstly, to gauge the job satisfaction levels of UAE nationals employed in the private sector and secondly to consider the HRM policies and procedures most likely to attract and retain such individuals. The issue is of contemporary importance because the UAE has a fast-growing population, and already overstaffed public sector and, a labor nationalization program that has yet to have a significant impact on the ratio of nationals employed in the private sector visa- vis the classic public sector. Using a combination of employee survey and expert interview feedback this study provides a …

Glycemic Index Of Foods, Adiposity And Metabolic Syndrome Risk In Emirati Young Adults, Maysm Nezar Mohamad

Theses

This dissertation is concerned with determining the prevalence of metabolic syndrome (MetS) in Emirati females aged 17–25 years and its relation to overweight and obesity. It also aims to determine the glycemic index (GI) and glycemic load (GL) values for traditional Emirati foods that have not been tested yet. In a cross-sectional study design, anthropometric measurements, blood pressure and biochemical measurements were collected from a total of 555 Emirati female college students and the prevalence of MetS was concluded. Furthermore, at least fifteen healthy subjects participated in the measurement of GI and GL values for each of the twenty-three Emirati …

Private Sector Emiratisation: Evaluating The Policies And Practices Designed To Achieve Abu Dhabi's Strategic Hrm Goal, Khaled Sultan Saeed Ai Kaabi

Theses

The purpose of this study is two-fold: firstly, to gauge the job satisfaction levels of UAE nationals employed in the private sector and secondly to consider the HRM policies and procedures most likely to attract and retain such individuals. The issue is of contemporary importance because the UAE has a fast growing population, an already overstaffed public sector and, a labour nationalisation program that has yet to have a significant impact on the ratio of nationals employed in the private sector visà- vis the classic public sector. Using a combination of employee survey and expert interview feedback this study provides …

Early Packet Rejection Using Dynamic Binary Decision Diagram, Vasiqullah Molvizadah

Theses

A firewall is a hardware or software device that performs inspection on a given incoming/outgoing packets and decide whether to allow/deny the packet from entering/leaving the system. Firewall filters the packets by using a set of rules called firewall policies. The policies define what type of packets should be allowed or discarded. These policies describe the field values that the packet header must contain in order to match a policy in the firewall. The decision for any given packet is made by finding the first matching firewall policy, if any.

In a traditional firewall, the packet filter goes through each …

Series Solutions Of Multi-Layer Boundary Value Problems, Amr Saad Hassan Bolbol

Theses

It is well known that differential equations (DEs) play an important role in many sciences. They are mathematical representations of many physical systems. By studying such DEs, one gains many important insights about the physical system. Solutions of DEs provide information on the physical system behavior. As many physical systems are nonlinear in nature, this naturally gives rise to nonlinear differential equations (NLDEs). Such NLDEs are, in most cases, hard or sometimes impossible to solve analytically. In such situations, we resort to numerical techniques to approximate the solutions. The purpose of this thesis is to consider nonlinear multi-layer boundary value …

Salt Gland Excretion Efficiency And Salinity Tolerance Of Sporobolus Species, Piumi Shrimani Weragodavidana

Theses

Halophytic C4 grasses, including Sporobolus species, have developed specific mechanisms to cope with salinity stress. Among these, “salt glands” which are bi- cellular leaf epidermal structures eliminating excess saline ions from shoots by excretion under salinity stress. Salt glands are morphologically visible and can potentially be used for salt tolerance breeding programs. The objectives of this study were: (1) to determine the leaf salt gland excretion rates of United Arab Emirates native halophytic chloridoid grass species, S. spicatus and S. arabicus; (2) to determine if leaf salt gland excretion rate and density can effectively predict salinity tolerance among Sporobolus genotypes, …

Exploring The Perceived And The Actual Written Feedback Preferences Between Elf Students And Teachers In The Uae, Najah Asad Al Mohammedi

Theses

No abstract provided.

The Potential Antioxidant And Anti-Inflammatory Effects Of Date Seed Powder In Rats, Fatima Theyab Saif Amer Ai Meqbaali

Theses

Chronic diseases are among the main leading causes of mortality and morbidity in the United Arab Emirates (UAE). Oxidative stress (defined as an imbalance in the reactive oxygen species production/degradation ratio) in interaction with inflammation, has been highlighted as one major underlying mechanism in the development of these diseases. Due to their antioxidant and anti-inflammatory properties, polyphenols could prevent the development of chronic diseases. Interestingly, date seeds are particularly rich in such compounds. Nonetheless, an in vivo study aiming at studying and understanding antioxidant and anti-inflammatory effects of date seeds in serum and various organs is missing. Therefore, the present …

Integration Of Lightweight & Energy Efficient Cipher In Wireless Body Area Network Fore-Health Monitoring, Azza Zayed Aishamsi

Theses

There is an increase in the diseases of the circulatory system in United Arab Emirates, which makes it the first leading cause of death. This led to a high demand for a continuous care that can be achieved by adopting an emerging technology of e- Health monitoring system using Wireless Body Area Network (WBAN) that can collect patient’s data. Since patient’s data is private, securing the communication within WBAN becomes highly essential. In this research thesis, we propose an architecture to secure the data transmission within the Wireless Body Area Network (WBAN) in e-Health monitoring. More specifically, our proposed architecture …

فاعلية برنامج تدريبي مقترح قائم على أنشطة اللعب الجماعي في تنمية المهارات الاجتماعية لدى الأطفال ذوي التوحد في امارة أبوظبي –دولة الإمارات العربية المتحدة- (دراسة حالة), ميرفت محمد عبده أحمد مشهور

Theses

This study aimed to investigate the effectiveness of a proposed training program Based on playgroup activities on developing the social skills of a child with autism attending one of the private schools in Abu Dhabi Education Council (ADEC). The study sample consisted of an eleven-year-old child with autism. He was integrated at Emirates Private School- Abu Dhabi in the Fourth Grade. In order to answer the questions of the study, the researcher used the following tools, after checking their reliability and validity: a form to collect data about the study sample, a social interaction list developed by the researcher as …

Sla Management In A Collaborative Network Of Federated Clouds: The Cloudland, Asma Obaid Subaih Ai Falasi

Theses

Cloud services have always promised to be available, flexible, and speedy. However, not a single Cloud provider can deliver such promises to their distinctly demanding customers. Cloud providers have a constrained geographical presence, and are willing to invest in infrastructure only when it is profitable to them. Cloud federation is a concept that collectively combines segregated Cloud services to create an extended pool of resources for Clouds to competently deliver their promised level of services. This dissertation is concerned with studying the governing aspects related to the federation of Clouds through collaborative networking. The main objective of this dissertation is …

Canards, Folded Nodes, And Mixed-Mode Oscillations In Piecewise-Linear Slow-Fast Systems, M Desroches, A Guillamon, E Ponce, Et Al

School of Engineering, Computing and Mathematics

Canard-induced phenomena have been extensively studied in the last three decades, from both the mathematical and the application viewpoints. Canards in slow-fast systems with (at least) two slow variables, especially near folded-node singularities, give an essential generating mechanism for mixed-mode oscillations (MMOs) in the framework of smooth multiple timescale systems. There is a wealth of literature on such slow-fast dynamical systems and many models displaying canard-induced MMOs, particularly in neuroscience. In parallel, since the late 1990s several papers have shown that the canard phenomenon can be faithfully reproduced with piecewise-linear (PWL) systems in two dimensions, although very few results are …

Wind Power: Frustrating Yet Inevitable, Garth Woodruff

Faculty Publications

No abstract provided.

Synthesis Of Orthogonally Protected Thioamide Dipeptides For Use In Solid-Phase Peptide Synthesis, Fintan Kelleher, Kim Manzor

Articles

Orthogonally protected thioamide-containing dipeptides were efficiently and cleanly prepared from the precursor dipeptides using Curphey’s method (P₄S₁₀, hexamethyldisiloxane (HMDO), reflux, DCM) in 67-96% isolated yield. This was in contrast to the use of Lawesson’s or Berzelius’ reagents where significant issues with reaction non-completion, decomposition and purification were observed. Subsequent clean removal of the dipeptides’ t-butyl ester protecting groups gave thioamide dipeptide acids which were suitable for use in solid-phase peptide synthesis (SPPS).

Proteus: Computing Disjunctive Loop Summary Via Path Dependency Analysis, Xiaofei Xie, Bihuan Chen, Yang Liu, Wei Le, Xiaohong Li

Research Collection School Of Computing and Information Systems

Loops are challenging structures for program analysis, especially when loops contain multiple paths with complex interleaving executions among these paths. In this paper, we first propose a classification of multi-path loops to understand the complexity of the loop execution, which is based on the variable updates on the loop conditions and the execution order of the loop paths. Secondly, we propose a loop analysis framework, named Proteus, which takes a loop program and a set of variables of interest as inputs and summarizes path-sensitive loop effects on the variables. The key contribution is to use a path dependency automaton (PDA) …

Connected In Isolation: A Correlational Study Of Students' Sense Of Connectedness In An Online Course And Their Learning Outcomes, Ben Morrell

Doctoral Dissertations and Projects

The purpose of this quantitative, bivariate correlational study is to understand the relationship between online high school students’ sense of connectedness in the course, as measured by the Online Student Connectedness Survey (OSCS) and the students’ standardized End of Course (EOC) Milestone scores. A review of literature revealed a lack of research on high school students and their perception of connection in their online course as it relates to their academic success. The independent variable for the study is the students’ sense of connectedness score as derived from the Online Student Connectedness Score (OSCS). The dependent variable for the study …

First Targeted Search For Gravitational-Wave Bursts From Core-Collapse Supernovae In Data Of First-Generation Laser Interferometer Detectors, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.

Physics Faculty Research & Creative Works

We present results from a search for gravitational-wave bursts coincident with two core-collapse supernovae observed optically in 2007 and 2011. We employ data from the Laser Interferometer Gravitational-wave Observatory (LIGO), the Virgo gravitational-wave observatory, and the GEO 600 gravitational-wave observatory. The targeted core-collapse supernovae were selected on the basis of (1) proximity (within approximately 15 Mpc), (2) tightness of observational constraints on the time of core collapse that defines the gravitational-wave search window, and (3) coincident operation of at least two interferometers at the time of core collapse. We find no plausible gravitational-wave candidates. We present the probability of detecting …

Results Of The Deepest All-Sky Survey For Continuous Gravitational Waves On Ligo S6 Data Running On The Einstein@Home Volunteer Distributed Computing Project, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.

Physics Faculty Research & Creative Works

We report results of a deep all-sky search for periodic gravitational waves from isolated neutron stars in data from the S6 LIGO science run. The search was possible thanks to the computing power provided by the volunteers of the Einstein@Home distributed computing project. We find no significant signal candidate and set the most stringent upper limits to date on the amplitude of gravitational wave signals from the target population. At the frequency of best strain sensitivity, between 170.5 and 171 Hz we set a 90% confidence upper limit of 5.5 x 10^-25, while at the high end of …

The Rate Of Binary Black Hole Mergers Inferred From Advanced Ligo Observations Surrounding Gw150914, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.

Physics Faculty Research & Creative Works

A transient gravitational-wave signal, GW150914, was identified in the twin Advanced LIGO detectors on 2015 September 2015 at 09:50:45 UTC. To assess the implications of this discovery, the detectors remained in operation with unchanged configurations over a period of 39 days around the time of the signal. At the detection statistic threshold corresponding to that observed for GW150914, our search of the 16 days of simultaneous two-detector observational data is estimated to have a false-alarm rate (FAR) of < 4.9 x 10^-6 yr^-1, yielding a p-value for GW150914 of < 2 x 10^-7. Parameter estimation follow-up on this trigger identifies its source …

Self-Aligned Carbon Nanotube Yarns For Multifunctional Optoelectronic Applications, Mohammed Uddin, Glenn Grissom, Miguel Leal, Veronica Galvez, Tarek Trad, Ahmed Touhami, Nazmul Islam, Jason Parsons, H. Justin Moore

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Chemistry)

In this work, the morphology and electrocatalytic features of carbon nanotube yarns at the structural level allow for enhanced photoconversion efficiency. The energy conversion of electronhole pairs within the carbon nanotube yarn (CNY) due to the functionalization with nanostructured photoactive TiO₂ phases is remarkable. A well oriented anatase TiO₂ thin layer (approximately 100 nm) forms at the interfaces of CNY and TiO₂ mesoporous film when the sample is precoated and annealed at 350ºC. Field Emission Scanning Electron Microscopy (FESEM) images show the integrity and homogeneity of the TiO₂ surface, which is indicative of the overall durability of the CNY-based dye …

Asymptotically Refined Score And Gof Tests For Inverse Gaussian Models, Anthony F. Desmond, Zhenlin Yang

Research Collection School Of Economics

The score test and the GOF test for the inverse Gaussian distribution, in particular the latter, are known to have large size distortion and hence unreliable power when referring to the asymptotic critical values. We show in this paper that with the appropriately bootstrapped critical values, these tests become second-order accurate, with size distortion being essentially eliminated and power more reliable. Two major generalizations of the score test are made: one is to allow the data to be right-censored, and the other is to allow the existence of covariate effects. A data mapping method is introduced for the bootstrap to …

Shrinkage Estimation Of Covariance Matrix For Portfolio Choice With High Frequency Data, Cheng Liu, Ningning Xia, Jun Yu

Research Collection School Of Economics

This paper examines the usefulness of high frequency data in estimating the covariancematrix for portfolio choice when the portfolio size is large. A computationally convenientnonlinear shrinkage estimator for the integrated covariance (ICV) matrix of financial as-sets is developed in two steps. The eigenvectors of the ICV are first constructed from adesigned time variation adjusted realized covariance matrix of noise-free log-returns of rel-atively low frequency data. Then the regularized eigenvalues of the ICV are estimated byquasi-maximum likelihood based on high frequency data. The estimator is always positivedefinite and its inverse is the estimator of the inverse of ICV. It minimizes the …

Fabrication And Characterization Of Graphite Oxide Based Field Effect Transistors For Non­ Enzymatic Glucose-Sensor Application, Khadija Said Rahman

Theses

Graphite-oxide based metal–oxide–semiconductor field-effect transistors (MOSFETs) were fabricated and used as glucose sensor. Herein, graphite-oxide was assembled between two planer electrical electrodes. The sensitivity of the sensor has been enhanced by adding copper (Cu) or silver (Ag) nanoparticles. The nanoparticles were produced by sputtering and inert gas condensation inside an ultra-high vacuum compatible system, and they were self-assembled on the graphite-oxide. The sensitivity of the sensor was increased by an order of magnitude when the silver nanoparticles were added. The sensitivity of each MOSFET was studied at different concentrations of non-enzymatic glucose for potential use in medical and industrial applications.

Message From The Chairs, Andrew Begel, Fabio Calefato, Christoph Treude

Research Collection School Of Computing and Information Systems

The Workshop on Social Software Engineering (SSE) focuses on the interplay between social computing and software engineering. On one hand, social factors in software engineering activities, processes and tools are essential for improving the quality of development processes and the software produced by them. Examples include the role of situational awareness and multi-cultural factors in collaborative software development. On the other hand, social software mediates people-to-people communication, supporting human choices, actions, and interactions with each other. Social software needs to accommodate a wide range of social concepts, such as trust, governance, reputation, and privacy. Being social, the software would also …

Photocopies, Patents, And Knowledge Transfer: "The Uneasy Case" Of Justice Breyer's Patentable Subject Matter Jurisprudence, Dmitry Karshtedt

Vanderbilt Law Review

One aspect of Justice Stephen Breyer's discomfort with patents, as expressed in his opinion for the Supreme Court in Mayo v. Prometheus and his dissent from the order dismissing certiorari in LabCorp v. Metabolite, is strikingly similar to one of his critiques of copyright law in The Uneasy Case for Copyright, a well-known article he wrote as Professor Breyer more than forty-five years ago. In The Uneasy Case, Breyer argued that the burdens on duplication of technical articles imposed by copyright law restrict the flow of information and prevent scientists from enjoying spillover benefits of published research. His patent opinions …

Iowa Waste Reduction Center Newsletter, November 2016, University Of Northern Iowa. Iowa Waste Reduction Center.

Iowa Waste Reduction Center Newsletter

Contents:

--- Stormwater Pollution Prevention Plans - What You Need to Know
--- IWRC Launches Brewery Certification Program
--- ICYMI - New Small Business Liaison for IDNR Air Quality
--- Industry News

Inside And Outside The Purple: How Armenians Made Byzantium, Michael Goodyear

Armstrong Undergraduate Journal of History

About the author

Michael Goodyear recently graduated with honors from the University of Chicago with a B.A. in History and Near Eastern Languages and Civilizations, as well as a minor in Latin American Studies. The focus of his research was on Byzantine history.

A Robust Speaker Identification Algorithm Based On Atomic Decomposition And Sparse Redundant Dictionary Learning, Thomas James Bryan Jr.

Theses and Dissertations

Speaker identification is performed in high additive white Gaussian noise environments by processing sounds as images in the time-frequency plane. The technique creates audio streams that remove background noise from speech while preserving speech quality. Atomic decomposition is implemented by the matching pursuit algorithm using Gabor or gammatone atomic dictionaries. Gabor atoms were originally proposed as fundamental building blocks of speech; whereas, gammatone atoms closely resemble the human cochlear impulse response. Atomic decomposition creates a sparsely populated time-frequency vector referred to as weight space. The populated positions in weight space have amplitude weights that are proportional to localized energy in …