Digital Commons Network^™

Evaluating Network Test Scenarios For Network Simulators Systems, A. Zarrad, Izzat M. Alsmadi

Computer Science Faculty Publications (Archived)

Networks continue to grow as industries use both wired and wireless networks. Creating experiments to test those networks can be very expensive if conducted on production networks; therefore, the evaluation of networks and their performance is usually conducted using emulation. This growing reliance on simulation raises the risk of correctness and validation. Today, many network simulators have widely varying focuses and are employed in different fields of research. The trustworthiness of results produced from simulation models must be investigated. The goal of this work is first to compare and assess the performance of three prominent network simulators—NS-2, NS-3, and OMNet++—by …

Online Integrity And Authentication Checking For Quran Electronic Versions, Izzat M. Alsmadi, M. Zarour

Computer Science Faculty Publications (Archived)

The ability to control data and information through the Internet can be challenging. Preliminary analysis showed that some tampering and forgery may occur to some words of the Quran in the electronic versions that span the Internet. Such small modifications may not be noticed by public audience. The holy book of Quran includes a unique feature in that its worldwide copies are all identical. The 114 chapters (Suras) and all their verses and words are preserved in the exact form. As such, we designed and evaluated a model and a tool to evaluate the integrity of the wording in the …

The Crime Lab In The Age Of The Genetic Panopticon, Brandon L. Garrett

Faculty Scholarship

"Scientific evidence really nails this man to the wall," the Harris County, Texas prosecutor told the jurors in closing statements. At trial, George Rodriguez claimed he was innocent and that he had been working a factory the day of the crime. The prosecutor emphasized, however, that the blood type of swabs taken from the victim showed that Rodriguez did commit the crime and that a hair from the crime scene matched him. But seventeen years later, the same hair was tested again, this time using DNA analysis, and the evidence cleared Rodriguez and ultimately led to the crime crime lab …

Is ‘Small’ Always Small And ‘Big’ Always Big? Re-Reading Educational Developments In Small (And Micro) States, Tavis D. Jules, Patrick Ressler

Education: School of Education Faculty Publications and Other Works

This volume is concerned with a topic that has only relatively recently started to attract the attention it deserves: educational developments in small states. The volume is guided by the question (i) if and how small states deal with certain policy challenges to their education systems that research has identified as particularly important for their future development, and (ii) whether there is something like typical ‘small state behavior’ in educational matters. The volume seeks to contribute to a genuinely comparative approach to education in small states. Moreover, widening conventional definitions of smallness, it aims to advance research in the field …

Modelling And Simulation Of Grid Connected Lithium-Ion Battery Using Homer, Shantu Ghose, Adel El-Shahat

Electrical & Computer Engineering: Faculty Publications

In order to improve battery technology understanding the capacity fading method in batteries is very important. Battery models can be used to predict their behavior under various operating conditions. Here we proposed a simple dynamic model of lithium-ion battery with MATLAB/Simulink to observe the output characteristics of this energy storage device. Dynamic simulations are carried out, including the observation of the changes in battery terminal output voltage under different discharging/charging, temperature and cycling conditions. The simulation studies are presented for proving that the model is useful. At the end we will use this energy storage device to interconnect with HOMER. …

The Impact Of Culture, Leadership, And Power, On Staff Motivation In The Context Of International Organizations, Erdem Erciyes

Plymouth Business School Theses

This thesis investigates the impact of culture, leadership, and power, on staff motivation in selected international organizations (IOs), and develops a theoretical framework to assist with the practice of workforce motivation. The main research question is: “How can supervisors motivate their staff in the context of IOs?” Utilizing critical theory as a paradigm of inquiry, the study’s philosophical perspective leans heavily on “phenomenology”. Conducting this research led to the realization that there are a few studies in the existing literature on this subject matter. After investigating grand theories, the meso theories which form the theoretical background of the research were …

2017 Nyar (Savannah) Program, National-Youth-Risk (Savannah) Conference

National Youth Advocacy & Resilience Conference

N/A

Perceptions And Practices Of Administrators And Teachers In Jesuit Secondary Schools In The Hazaribag Province Of India Regarding Ideal Ignatian Educators, Vincent Hansdak

Doctoral Dissertations

The growing number of complex learning contexts and needs of students has challenged the quality of education at all levels. The need to offer the most satisfactory and meaningful education to all students consistently attracts researchers, policymakers, and educators to comprehensively understand what comprises successful learning, and in particular, what qualities do effective teachers have around the world. Though some developed countries have made significant progress toward quality education, many developing countries experience numerous obstructions to guaranteeing quality education to students. Most importantly, India, due to its economic, cultural, and social divides, still grapples with equity and the quality of …

Effects Of A Counseling Program On First-Generation High-School Student Aspirations, Self-Efficacy, Perceived Barriers, Knowledge Of The College-Application Process, And Course Selection, Edress Waziri

Doctoral Dissertations

The benefits of a college degree are clear. Those with a college education are more likely to participate effectively in the governance of the nation, contribute their time and resources to the community, depend less on government services, and engage in fewer crimes (Institute for Higher Education Policy, 1998). According to the literature, the parents’ level of education is a major indicator in determining whether a student completes a 4-year college degree (Perna & Titus, 2005). First-generation students are far less likely to gain admission and complete a degree from a 4-year university, in comparison to non-first-generation students (Tinto, 2006). …

Differentiating Literacy Instruction For Digital Learners: The Effect Of Multimedia Think-Aloud Worked Examples On Adolescent Analytical Reading Comprehension, Diana Combs Neebe

Doctoral Dissertations

Learning by example is nothing new to the education landscape. Research into think-aloud protocols, though often used as a form of assessment rather than instruction, provided practical, content-specific literacy strategies for crafting the instructional intervention in this study. Additionally, research into worked examples—from the earliest pen-and-paper studies of algebra and statistics, to more recent multimedia studies of legal reasoning and writing—shaped the conceptual framework for the present study by detailing a series of design principles for effective multimedia worked examples. This study aimed to reimagine the face-to-face, teacher-facilitated think-aloud as a multimedia worked example, which could be leveraged for differentiated, …

The Effects Of Gender-Aware Leadership-Development Training On The Leadership- Behavioral Competencies Of Women Software Engineers In California’S Silicon Valley, Leann Pereira

Doctoral Dissertations

This study was conducted to investigate the effects of a leadership-development training workshop on leadership behaviors among women software engineers in a California Silicon Valley engineering community with a two-phase, mixed-methods research design. The training workshop was developed using a framework for developing leadership-behavioral competencies among women (LBCW), which was congruent with theoretical principles for women’s leadership development.

LBCW was comprised of four competencies: self-advocacy, social networking, psychological capital, and goal orientation. A pretest–posttest comparison-group design was used to assess the effects of the training on LCBW among 70 participants with four instruments: the Leadership Development and Activities Instrument, the …

Writing-To-Learn In High-School Chemistry: The Effects Of Using The Science Writing Heuristic To Increase Scientific Literacy, Denae Nurnberg

Doctoral Dissertations

Writing-to-Learn in High-School Chemistry: The Effects of Using the Science Writing Heuristic to Increase Scientific Literacy

The purpose of this study was to investigate the effectiveness of using the Science Writing Heuristic (SWH) as an instructional tool to improve academic achievement and writing in the context of scientific literacy. This quasi-experimental study compared the effects of using the SWH in five laboratory settings over a 16-week span. The SWH was administered to a treatment group (n=63), whereas the comparison group (n=67) received laboratory sessions using a traditional laboratory report format.

There were four classes (n=130) of general chemistry enrolled in …

Social Loafing Construct Validity In Higher Education: How Well Do Three Measures Of Social Loafing Stand Up To Scrutiny?, Jacquelyn Deleau

Doctoral Dissertations

The purpose of this study was to examine the construct validity of social loafing using convergent and discriminant validity principles. Three instruments that purport to measure social loafing were factor analyzed: A ten-item instrument by George (1992), a 13-item instrument by Mulvey and Klein (1998), and a 22-item instrument by Jassawalla, Sashittal, and Malshe (2009) for a total of 45 items that were compiled into a single instrument with which data were collected, correlated, and factor analyzed.

One hundred and sixty graduate and undergraduates enrolled in management courses at a small private Northern California university were surveyed. Thirteen classes were …

Relative Importance Of Anxiety And Motivational Variables In Predicting Language Achievement For College Learners Of Chinese, Qi Wang

Doctoral Dissertations

The growing worldwide enthusiasm in learning Chinese calls for more research on learner characteristics in Chinese classrooms to better inform teaching practice. Language anxiety, which falls under the umbrella of learner’s affect, is considered an important affective aspect that negatively influences language learning and acquisition. As research on language anxiety mainly focused on the learning of Western languages, this study constitutes an initial attempt to investigate anxiety in the learning of Chinese through the testing of a structural model. The purpose of the study was to examine the relative importance of language anxiety in predicting Chinese achievement when motivation, integrativeness, …

Community Members' Perspectives On The Thurgood Marshall Academic High School Riot: A Case Study Of The Effects Of Embedded Law Enforcement In High School, Kim-Shree Maufas

Doctoral Dissertations

Despite studies by legal and social-justice organizations pointing to connections between school-based police referrals and arrests that lead youth (particularly of color) into the juvenile-justice courts and criminal courts and are funneling students of color into the school-to-prison pipeline, schools increasing use school resource officers (SROs) in programs on K-12 campuses. Much of the academic literature about SROs in schools highlight the rationale for placing programs in urban schools from the perspectives of policymakers, legislators, members of the juvenile- and criminal-justice systems, and school district officials. Limited scholarly work documents the voices of impacted members of school communities (educators, students, …

Exploring The Experiences Of Black Men As Respondents In University Student Conduct Processes, Brian Arao

Doctoral Dissertations

Student conduct processes in higher education have been studied and theorized extensively from a structural perspective, yielding a wealth of guidance for practitioners on how they can best design and administer disciplinary interventions (e.g., Lancaster & Waryold, 2008b). However, very little published research has focused on students' perceptions of and experiences with student conduct processes, and to what extent these are congruent with the espoused learning goals of student conduct practitioners (Dannells, 1997; Karp & Sacks, 2014; Stimpson & Stimpson, 2008). Among these scant studies, the findings of King (2012) and Karp and Sacks (2014) suggest that Black men may …

The Impact Of The Boston Marathon Bombing On Public Willingness To Cooperate With Police, Gary Lafree, Amy Adamczyk

Publications and Research

While a key to law enforcement success is the willingness of the public to cooperate with police, we have limited understanding of how terrorist attacks affect this public readiness. Prior research suggests that terrorist attacks might increase citizen cooperation with police through both prevention efforts and rally effects. We test these assertions with three nationally representative surveys on respondents’ willingness to help police combat terrorism: one before the Boston Marathon bombings and two after. As predicted, public willingness to report suspicious behavior to police increases significantly following the bombings and there is evidence that these increases generalize to ordinary crime. …

Income Taxation And Asset Valuation (Ii) The Value Of Preferential Taxation, Theodore S. Sims

Faculty Scholarship

The predecessor to this Article explored the properties of an income tax that uses economic depreciation in measuring capital income. This Article investigates some fundamental properties of an income tax that does not. The predecessor illuminated the equivalence between economic depreciation and accrual taxation, and highlighted the insight, due to Paul Samuelson, that either produces asset values that are independent of their holders' marginal rates, even in a system with graduated rates (and even if those rates vary over time). The current Article explores in qualitative terms the value of "preferential" departures from valuation-neutral taxation.

Nano-Magnetic Resonance Imaging (Nano-Mri) Gives Personalized Medicine A New Perspective, Lorenzo Rosa, Jonathan Blackledge, Albert Boretti

Articles

This paper reviews some of the major and most recent advances in nanoscale-magnetic resonance imaging (nano-MRI) for personalized medicine (PM). Nano-MRI may drastically expand the capabilities of the traditional magnetic resonance images (MRI), down to the nanometer scale and possibly, in the near future, at the atomic scale. Nano-MRI is potentially able to observe structures which cannot be seen using today’s molecular imaging, with sensitivities of many billions of times better than MRI as currently used in hospitals, for example. The paper briefly reports on the foremost research themes in nano-MRI.

Information Hiding With Data Diffusion Using Convolutional Encoding For Super-Encryption, Jonathan Blackledge, Paul Tobin, J. Myeza, C.M. Adolfo

Articles

The unification of data encryption with information hiding methods continues to receive significant attention because of the importance of protecting encrypted information by making it covert. This is because one of the principal limitations in any cryptographic system is that encrypted data flags the potential importance of the data (i.e. the plaintext information that has been encrypted) possibly leading to the launch of an attack which may or may not be successful. Information hiding overcomes this limitation by making the data (which may be the plaintext or the encrypted plaintext) imperceptible, the security of the hidden information being compromised if …

Characterization Of The Sub-Micrometer Hierarchy Levels In The Twist-Bend Nematic Phase With Nanometric Helices Via Photopolymerization: Explanation For The Sign Reversal In The Polar Response, Vitaly Panov, Sithara Sreenilayam, Yuri Panarin, Jagdish Vij, Chris Welch, Georg Mehl

Articles

Photopolymerization of a reactive mesogen mixed with a mesogenic dimer, shown to exhibit the twist-bend nematic phase (NTB), reveals the complex structure of the self-deformation patterns observed in planar cells. The polymerized reactive mesogen retains the structure formed by liquid crystalline molecules in the twist bend phase, thus enabling its observation by scanning electron microscopy (SEM). Hierarchical ordering scales ranging from tens of nanometers to micrometers are imaged in detail. Submicron features, anticipated from earlier X-ray experiments, are visualized directly. In the self-deformation stripes formed in the NTB phase, the average director field is found tilted in …

An Analysis Of Harmonic Heating In Smart Buildings And Distribution Network Implications With Increasing Non-Linear (Domestic) Load And Embedded Generation, Chittesh Veni Chandran, Keith Sunderland, Malabika Basu

Articles

Harmonic distortion is generally not taken into account within domestic installations and the associated wiring systems, as its potential is considered sufficiently small to be neglected. Standards to limit harmonic manifestations in the low voltage (LV) network are available, but these can be breached as a consequence of advancements in power electronics in some modern household devices contributing higher levels of harmonic distortion than permitted. While these devices individually might not be considered serious in terms of system level harmonic distortion manifestations, electrical equipment failures and insulation failures - increasingly being derived from harmonic cable heating - suggest a different …

Magnetic Field Sensing Using Whispering Gallery Modes In A Cylindrical Microresonator Infilitrated With Ferronematic Liquid Crystal, Aseel Mahmood, Vishnu Kavungal, Sudad S. Ahmed, Peter Kopcansky, Vlasta Zavisova, Gerald Farrell, Yuliya Semenova

Articles

An all-fiber magnetic field sensor based on whispering-gallery modes (WGM) in a fiber micro-resonator infiltrated with ferronematic liquid crystal is proposed and experimentally demonstrated. The cylindrical microresonator is formed by a 1 cm-long section of a photonic crystal fiber infiltrated with ferronematic materials. Both ferronematics suspensions are prepared based on the nematic liquid crystal 1-(trans-4-Hexylcyclohexyl)-4-isothiocyanatobenzene (6CHBT) doped with rod-like magnetic particles in the first case and with spherical magnetic particles in the second case. WGMs are excited in the fiber microresonator by evanescent light coupling using a tapered fiber with a micron-size diameter. The Q-factor of the microresonator determined from …

The Role Of The Dendritic Growth Models Dimensionality In Predicting The Columnar To Equiaxed Transition (Cet), M. Seredynski, Marek Rebow, J. Banaszek

Articles

The dendrite tip kinetics model accuracy relies on the reliability of the stability constant used, which is usually experimentally determined for 3D situations and applied to 2D models. The paper reports authors` attempts to cure the situation by deriving 2D dendritic tip scaling parameter for aluminium-based alloy: Al-4wt%Cu. The obtained parameter is then incorporated into the KGT dendritic growth model in order to compare it with the original 3D KGT counterpart and to derive two-dimensional and three-dimensional versions of the modified Hunt’s analytical model for the columnar-to-equiaxed transition (CET). The conclusions drawn from the above analysis are further confirmed through …

Adaptive Linear Prediction For Optimal Control Of Wind Turbines, Mahinsasa Narayana, Keith Sunderland, Ghanim Putrus, Michael Conlon

Articles

In order to obtain maximum power output of a Wind Energy Conversion System (WECS), the rotor speed needs to be optimised for a particular wind speed. However, due to inherent inertia, the rotor of a WECS cannot react instantaneously according to wind speed variations. As a consequence, the performance of the system and consequently the wind energy conversion capability of the rotor are negatively affected. This study considers the use of a time series Adaptive Linear Prediction (ALP) technique as a means to improve the performance and conversion efficiency of wind turbines. The ALP technique is introduced as a real …

Clustering-Based Online Player Modeling, Jason M. Bindewald, Gilbert L. Peterson, Michael E. Miller

Faculty Publications

Being able to imitate individual players in a game can benefit game development by providing a means to create a variety of autonomous agents and aid understanding of which aspects of game states influence game-play. This paper presents a clustering and locally weighted regression method for modeling and imitating individual players. The algorithm first learns a generic player cluster model that is updated online to capture an individual’s game-play tendencies. The models can then be used to play the game or for analysis to identify how different players react to separate aspects of game states. The method is demonstrated on …

Compact Humidity Sensor Based On A Multi-Layer Agarose Hydrogel Coated Silica Microsphere Resonator, Arun Mallik, Yuliya Semenova, Vishnu Kavungal, Dejun Liu

Conference Papers

In this paper we report on a novel approach to implementing a compact humidity sensor that utilizes whispering gallery mode (WGM) phenomena in a silica microsphere coated with Agarose hydrogel. The spectral positions of the WGM resonances for such a sensor depend strongly on the refractive index and thickness of the coating. The WGM’s spectral shift occurs due to adsorption/desorption of the water vapor in response to changes in ambient humidity and also due to the corresponding changes of the coating thickness. We experimentally investigated the WGMs spectral shift for a 100 μm diameter silica microsphere coated with Agarose hydrogel …

Size And Shape Control In Metal Nanoparticles And Nanocomposites, Tomendro Subedi

Theses and Dissertations (Comprehensive)

This thesis describes major findings on the shape transformation of the precursor silver decahedral nanoparticles (AgDeNPs) with pentagonal symmetry and twin defects into silver pentagonal prism nanoparticles (AgPPNPs) using Br¯ as a shape selective reagent. Silica-encapsulation of the gold-plated AgDeNPs was also carried out forming ordered arrays of silica encapsulated gold-plated AgDeNPs (SiO₂@Au@AgDeNPs) of different sizes. At first, synthetic procedures for AgDeNPs (pentagonal bipyramids), silver pentagonal rod nanoparticles (AgPRNPs) and gold-plating of AgDeNPs (Au@AgDeNPs) were optimized. Gold plating enhances the chemical stability of AgDeNPs and preserves the superior plasmonic properties of silver. This thesis deals with the transformation …

Accountability, Conservation And Community: Measuring The Local Economic Impacts Of Protected Areas, Catharine A.M. Brazeau

Theses and Dissertations (Comprehensive)

As a signatory to the Convention on Biological Diversity, Canada has committed to help protect biodiversity through an increase in effectively and equitably managed systems of protected areas (PAs) by 2020. If Canada fulfills this commitment, the country will see the largest expansion of PA networks in its history. Although employing ‘equitable and effective management’ suggests PAs have a responsibility to consider their effects on local stakeholders, on the whole, Canada’s PA agencies do not publicly and systematically report on their jurisdictions’ local economic impacts. To address this gap, this thesis aims investigate mechanisms for PA agencies to identify and …

Disease Models With Immigration, Reem Almarashi

Theses and Dissertations (Comprehensive)

In this thesis we focus first on studying the susceptible, exposed, and infected ($SEI$) disease model without immigration. We determine the basic reproduction number $\mathcal{R}_0$, which can be interpreted as the expected number of new cases that can be produced by a single infection in a completely susceptible population. Further, by using the Jacobian matrix, we determine the local stability of the disease model. Then we have the result that when $\mathcal{R}_0<1$ the DFE point is locally asymptotically stable(L.A.S). In contrast, when $\mathcal{R}_0>1$ we find that the endemic equilibrium is L.A.S. After that, we analyze the $SEI$ model with immigration of infected individuals.

Furthermore, we investigate the direction that the …