Digital Commons Network^™

Theoretical Analysis Of Shape Separation Of Particles Using Flow Field-Flow Fractionation, Mehrdad Alfi

Masters Theses

"Size separation of spherical and rod-like particles in Flow Field-flow Fractionation was investigated theoretically. The effect of cross flow migration and rod orientation was also investigated as a new mode of study. It has been shown that the rod local orientation makes different diffusivity values in comparison with spherical particles and helps particle separation. Additionally, a new mechanism of lift-hypelayer mode was used for rod-like particles which can be compared with steric mode of spherical particles. This mechanism is said to be due to hydrodynamic interaction of rod-like particle with wall and with other rods.

As a measure of axial …

An Analytical Pressure Model To Guide Downhole Sensor Placement For Carbon Dioxide Sequestration Monitoring, Yilin Mao

Masters Theses

"Injecting CO₂ into saline aquifers is currently the most viable approach to mitigate global greenhouse gas effect. Various monitoring techniques are required to achieve 99% accuracy in determining the location of the injected CO₂ plume. Sensor locations are critical to the monitoring quality necessary to meet this requirement but have scarcely been discussed. The pressure profile needs to be modeled accurately at the initial stage of CO₂ injection to guide sensor locations. The objective of this thesis was to develop an analytical solution for CO₂ sequestration based on time and distance. This will guide the locations of downhole pressure sensors …

Thermal Properties Of Zirconium Diboride - Transition Metal Boride Solid Solutions, Devon Lee Mcclane

Masters Theses

"This research focuses on the thermal properties of zirconium diboride (ZrB₂) based ceramics. The overall goal was to improve the understanding of how different transition metal (TM) additives influence thermal transport in ZrB₂. To achieve this, ZrB₂ with 0.5 wt% carbon, and 3 mol% of individual transition metal borides, was densified by hot-press sintering. The transition metals that were investigated were: Y, Ti, Hf, V, Nb, Ta, Cr, Mo, W, and Re. The room temperature thermal diffusivities of the compositions ranged from 0.331 cm²/s for nominally pure ZrB₂ to 0.105 cm²/s for (Zr,Cr)B₂ and converged around 0.155cm²/s at higher temperatures …

Techno-Economic And Life-Cycle Modeling And Analysis Of Various Energy Storage Technologies Coupled With A Solar Photovoltaic Array, Brian Andrew Peterson

Masters Theses

"Renewable energies, such as wind and solar, are a growing piece of global energy consumption. The chief motivation to develop renewable energy is two-fold: reducing carbon dioxide emissions and reducing dependence on diminishing fossil fuel supplies. Energy storage is critical to the growth of renewable energy because it allows for renewably-generated electricity to be consumed at times when renewable sources are unavailable, and it also enhances power quality (maintaining voltage and frequency) on an electric grid which becomes increasingly unstable as more renewable energy is added. There are numerous means of storing energy with different advantages, but none has emerged …

An Empirical Study On Symptoms Of Heavier Internet Usage Among Young Adults, Saipreethi Vishwanathan

Masters Theses

"Understanding negative consequences of heavy Internet use on mental health is a topic that is gaining significant traction recently. A number of studies have investigated heavy Internet usage, especially among young adults in relation to online games, social media and email. While such studies do provide valuable insights, Internet usage so far has been characterized by means of self-reported surveys only that may suffer from errors and biases. In this paper, we report the findings of a two month empirical study on heavy Internet usage among students conducted at a college campus. The novelty of the study is that it …

Analysis Of A Ventilation Network In A Multiple Fans Limestone Mine, Ali Haghighat

Masters Theses

"As mining progresses the total resistance of an excavation is increased, the mine characteristic curve becomes steeper, and the operating point moves up the fan curve, reducing the total air quantity and increasing the system pressure. For multi-level ventilation networks with a number of fans the process can be tedious, and on a count of numerous dependent factors the optimal combination of fans is very hard to be achieved. The design of a ventilation network in conjunction with multi surface fans and booster fans entails a complex procedure.

The objective of this study is to provide a plan to improve …

Dephosphorylation Of Iqg1 By Cdc14 Temporally Regulates Actin Ring Formation, Daniel Patrick Miller

Masters Theses

"Cytokinesis is the final step in cell division when the cell separates the cytoplasm by contracting a ring composed of filamentous actin (F-actin) and type II myosin. Iqg1, an IQGAP family member, is an essential scaffolding protein in budding yeast (S. cerevisiae) required for actin recruitment to, and contraction of, the actomyosin ring. Actin is recruited by the calponin homology domain (CHD) in anaphase after Iqg1 is localized to the bud neck. Consensus sites for the cyclin-dependent kinase (CDK) Cdc28 were identified flanking the CHD. This led us to the hypothesis that phosphorylation of Iqg1 by Cdc28 negatively regulates actin …

Effect And Interactions Of Commercial Additives And Chloride Ion In Copper Electrowinning, Wenyuan Cui

Masters Theses

"This thesis is to understand and compare the effects and interactions of modified polysaccharide (HydroStar), polyacrylamide (Cyquest N-900) and chloride ion on copper electrowinning. A study of the nucleation and growth was conducted in a synthetic electrolyte (40 g/L Cu, 160 g/L H₂SO₄, 20 mg/L Cl-) with the addition of HydroStar or Cyquest N-900 using potential step measurements. The current responses generated were compared to theoretical models of nucleation and growth mechanisms. The nucleation and growth mechanism changed as function of potential and the presence of organic additives. The nucleation and growth mechanisms were confirmed using scanning electron microscopy (SEM). …

The Effects Of Advanced Structural Materials To Mitigate Explosive And Impact Threats, Caleb Michael Baumgart

Masters Theses

"In a world of ever newer and modified improvised explosive devices (IEDs) that are very common in certain parts of the world, it is always more important to improve the devices used for protection. This research endeavors to design and analyze a blast barrier using three different media types to mitigate the high pressures from an IED or a car bomb. The three media types used in this research are pumice, steel grit, and foam. Six barriers were built to test the three media types and account for the changes from a standard solid concrete barrier to a barrier with …

Crime Pattern Detection Using Online Social Media, Raja Ashok Bolla

Masters Theses

"In this research, we show online social networks can be used to study crime detection problems. Crime is defined as an act harmful not only to the individual involved, but also to the community as a whole. It is also a forbidden act that is punishable by law. Crimes are social nuisances that place heavy financial burdens on society. Here we look at use of data mining followed by sentiment analysis on online social networks, to help detect the crime patterns. Twitter is an online social networking and microblogging service that enables users to post brief text updates, also referred …

Characterization Of 304l Stainless Steel By Means Of Minimum Input Energy On The Selective Laser Melting Platform, Ben Brown

Masters Theses

"Developing parameter sets for new materials on the Selective Laser Melting (SLM) platform has traditionally been done through the use of single line processing windows and a basic design of experiments (DOE) which would include varying machine parameters to maximize density. This study expands the traditional method by determining the main effects statistically for density, allowing for a more in depth analysis wherein the experimental results are statistically correlated to the variable machine parameters used. With this analysis, parameter optimization with respect to achieving near full density, while also considering build rates, can be performed. New parameters for 304L stainless …

Effects Of Grain Properties And Compaction On Single-Tool Normal Indentation Of Granular Materials, Dennis Chieze Duru

Masters Theses

"The behavior of three granular materials; filter sand, crushed garnet, and shale cutting, were investigated in an effort to evaluate the effect of grain size and shape, and material compaction under single tool load-indentation test. Force-penetration data was collected continuously through the end of each test and specific energy and specific penetration was calculated from the data.

Grain size and compaction affected the force penetration behavior. The higher the grain size, the more the fluctuation in the force of penetration. In addition, compaction reduces the force fluctuation in the fine aggregate grains, but increases the magnitude of the force fluctuations …

Development And Characterization Of Spiral Additions In A Ceramic Matrix, Andrea Lynn Els

Masters Theses

"A novel spiral architecture was formed using titanium diboride and silicon carbide ceramics as either the spiral or matrix phase. Particulate composites with the same compositions were fabricated to compare to the materials in this study. Spiral additions were formed using powder loaded polymers followed by a single and/or multi-filament co-extrusion. For 25 vol% SiC spiral additions to TiB₂, boron nitride was added to the SiC spiral to alter the bonding at the interface and reduce thermal residual stresses. All samples were hot-pressed to near full density at 1980 ⁰C. Hot pressed multi-filament co-extrusion of 2.4 mm / …

Gel Treatment Field Application Survey For Water Shut Off In Production Wells, Jingyi Liao

Masters Theses

"Enhanced oil recovery (EOR) screening criteria are considered as a guideline for candidate evaluation and determination. Not many screening criteria for gel treatment had been published. Some published gel treatment application surveys for water shut off only include limited number of oil fields and locations.

The current work aims to summarize the worldwide gel treatment applications for water shut off in production wells by creating and analyzing a dataset from a variety of sources. This study started from collecting and cleaning the gel treatment application data. All the data were from SPE field publications from 1990 to 2012 and from …

Parental Mediation Of Adolescent Movie Viewing, Larry James Webster Jr.

Theses and Dissertations

Parental mediation of media use by children has been studied extensively as it applies to television and children 12 years old and younger. This study expands the scope of Parental Mediation Theory by applying it to adolescents (age 13-17 years old) and movie viewing. The results of this study show overall parental mediation of adolescent movie viewing is negatively associated with the age of the child. The results show that among parents who mediate movie viewing, restrictive, instructive and social co-viewing mediation strategies are negatively correlated with the age of the adolescent. Third Person Effect is also examined as parental …

Emotional Bond Between The Creator And The Avatar: Changes In Behavioral Intentions To Engage In Alcohol-Related Traffic Risk Behaviors, Hokyung Kim

Theses and Dissertations

The present study examines the joint impact of relationship with one's avatar and negative consequences to the avatar on changing behavioral intentions (CBI) in terms of alcohol-impaired driving. Avatars are users' visual self-representation in a virtual world, and play a major role to build the users' digital identity. One hundred eleven participants volunteered to participate in several experimental conditions where the degree of choice of avatar features and the degree of active control of the avatar were manipulated in Second Life, an immersive 3D virtual environment. Participants who were allowed to customize their avatar viewed their avatar more similar and …

Measurements And Transient Multistep Outflow Simulation Of Soil-Water Characteristic Curve For Soils Modified With Biopolymers, Xiaoyi Zhao

Masters Theses

"In recent decades, biopolymers have shown promising applications in soil modification due to its environmental friendly nature. Most of the studies, however, focused on mechanical properties at saturated or unsaturated conditions. The study on unsaturated soil behaviors under controlled pore air and pore water pressures were limited. Soil-water characteristic curve (SWCC), relating water content with matric suction is a key property to evaluate unsaturated soils. With SWCC, other soil properties, such as hydraulic conductivity and shear strength can be estimated. In this study, SWCC of sands modified with different biopolymers were measured with both Tempe cell and Fredlund SWCC device. …

Replication Of Known Dental Characteristics In Porcine Skin: Emerging Technologies For The Imaging Specialist, L. Thomas Johnson, Thomas W. Radmer, Dean C. Jeutter, Gary L. Stafford, Joseph Thulin, Thomas Wirtz, George Corliss, Kwang Woo Ahn, Alexis Visotky, Ronald L. Groffy

School of Dentistry Faculty Research and Publications

This study demonstrates that it is sometimes possible to replicate patterns of human teeth in pig skin and determine scientifically that a given injury pattern (bite mark) correlates with the dentitions of a very small proportion of a population dataset, e.g., 5 percent or even 1 percent. The authors recommend building on the template of this research with a sufficiently large database of samples that reflects the diverse world population. They also envision the development of a sophisticated imaging software application that enables forensic examiners to insert parameters for measurement, as well as additional methods of applying force to produce …

Fabrication Of Glass Fiber-Reinforced Transparent Composites Using Vacuum Assisted Resin Transfer Molding Process, Gregory A. Taylor

Masters Theses

"The most commonly used transparent material is glass. Traditionally, glass is not desired for applications involving a low weight material while preserving high strength such as aerospace and military applications where armor must also be transparent. Some applications may include aircraft canopies and other vehicle windows. Development of a reliable transparent composite would fill a need for many of these applications where a transparent structure must both be strong and lightweight. A transparent polymer reinforced with a glass fiber fabric is a viable solution. To ensure transparency, both fiber and matrix must match in refractive index.

In the present work, …

Learning To Litigate: University Patents In The Knowledge Economy, Jacob H. Rooksby

Law Faculty Publications

Over the nearly two de cades since the publication of Academic Capitalism: Politics, Policies, and the Entrepreneurial University (Slaughter and Leslie 1997), the model of academic capitalism has become one of the more widely cited conceptual frameworks in the global literature on higher education. Works in the academic capitalist canon have relied on the two basic understandings of the theory of academic capitalism and the new economy, as articulated by Slaughter and Leslie (1997), Slaughter and Rhoades (2004), and Rhoades and Slaughter (2006). Rhoades and Slaughter (2006) summarize these two conceptual strands as “the increasing engagement of higher education institutions …

State Responsibility For Gender Stereotyping, Barbara Stark

Hofstra Law Faculty Scholarship

Scholars have recently re-discovered Justice Ruth Bader Ginburg’s early anti-stereotyping work. As Cary Franklin notes, Justice Ginsburg’s approach "was grounded not in a commitment to eradicating sex classifications from the law, but in a far richer theory of equal protection involving constitutional limitations on the state’s power to enforce sex-role stereotypes." Some of these scholars believe that this approach holds great promise for issues at the "frontiers of equal protection law" such as same-sex marriage and the work-family conflict. As Ginsburg herself has come to realize, however, anti-stereotyping is only the beginning. This Article explains why anti-stereotyping is insufficient, what …

The Role Of Ethics Audits In Improving Ethical Conduct In Law Firms: An Empirical Examination, Susan Saab Fortney

Hofstra Law Faculty Scholarship

For decades, legal malpractice experts have urged lawyers to implement risk management measures. To assist law firms in doing so, legal malpractice insurers have provided audit services and self-audit materials. The ABA Model Rules of Professional Conduct also recognize the importance of policies and procedures as an aspect of a firm’s ethical infrastructure. Specifically, Model Rule 5.1 and state versions of Model Rule 5.1 require that firm principals make reasonable efforts to ensure that the firm has in effect measures to ensure that firm lawyers conform to the rules of professional conduct.

From The Rule Of One To Shared Parenting: Custody Presumptions In Law And Policy, J. Herbie Difonzo

Hofstra Law Faculty Scholarship

Child custody presumptions have formed part of Anglo-American law for centuries. Both the paternal preference rule at common law and the tender years doctrine that supplanted it in the nineteenth century signaled the law’s conviction that custody was indivisible: after a marital breakup, children could be entrusted to only one parent, with the other an infrequent visitor. This “rule of one” began to weaken in the last third of the twentieth century, as the movement toward gender equality called attention to the importance of both parents in the care and nurturance of children and loosened the link between gender and …

Measuring Manufacturing: How The Computer And Semiconductor Industries Affect The Numbers And Perceptions, Susan N. Houseman, Timothy J. Bartik, Timothy Sturgeon

Upjohn Institute Working Papers

Growth in U.S. manufacturing’s real value-added has exceeded that of aggregate GDP, except during recessions, leading many to conclude that the sector is healthy and that the 30 percent decline in manufacturing employment since 2000 is largely the consequence of automation. The robust growth in real manufacturing GDP, however, is driven by one industry segment: computers and electronic products. In most of manufacturing, real GDP growth has been weak or negative and productivity growth modest. The extraordinary real GDP growth in computer-related industries reflects prices for computers and semiconductors that, when adjusted for product quality improvements, are falling rapidly. Productivity …

2014-2015 Student Handbook, Nova Southeastern University

NSU Student Handbooks

No abstract provided.

Formerly Manufacturing Entities: Piercing The "Patent Troll" Rhetoric, Kristen Jakobsen Osenga

Law Faculty Publications

Everyone hates patent trolls-those companies that "hijack somebody else's idea" and use the patents to "extort some money" from companies that actually make things. But, despite the rhetoric, not all patent trolls are created equal. This Article is the first to focus on one type of patent troll the formerly manufacturing entity. These patent trolls used to make or do something in commerce, but now derive all or a significant portion of their income through licensing their intellectual property. Using case study analysis, this Article demonstrates that formerly manufacturing entities do not impose the harms associated with patent trolls more …

Filling The District Of Arizona Vacancies, Carl W. Tobias

Law Faculty Publications

The judicial vacancy crisis must end. The federal bench has experienced nearly a ten percent vacancy rate over an unprecedented four and a half-year period. The substantial number and protracted character of those openings have imposed numerous detrimental effects. These phenomena have delayed the scheduling of jury trials in many civil cases and even propelled termination of some litigation because the Speedy Trial Act requires that criminal matters have precedence. Indeed, the emergency designation has meant that some criminal proceedings were delayed in the Arizona District. The vacancy crisis places additional pressure on sitting judges, particularly the eight senior judges …

The Syntheses, Characterizations, And Applications Of Novel Photo- And Electrochemical Catalysts, Lauren Rae Grabstanowicz

Graduate Research Theses & Dissertations

This dissertation investigates two separate clean energy applications, emphasizing material applications and electrochemistry techniques. The first section examines environmentally friendly alternatives for water purification to avoid carcinogenic by-products. To diminish such possibilities, research has shifted towards photoelectrochemical catalysts, such as titanium dioxide (TiO2), because pure TiO2 has limited absorption in the ultraviolet region. Therefore, Ti3+, a self-dopant, has become an attractive candidate for environmentally friendly alternatives. This dissertation demonstrates a novel oxidation procedure to form self-doped Ti3+ in the bulk of rutile TiO2. A brief overview of the work will be given and supporting data including material, methods, structural characterization, …

High School Teachers' Disciplinary Literacy Knowledge : A Mixed-Method Study, Paula Di Domenico

Graduate Research Theses & Dissertations

This mixed-methods study examines the disciplinary-literacy knowledge that high school English, mathematics, science, and social studies teachers possess and the knowledge and skills on which they rely when planning for instruction. Three hundred and eleven high school teachers completed a survey that measured high school teachers' disciplinary-literacy knowledge; four teachers who completed the survey also participated in a think-aloud of unit design and a semistructured interview. Quantitative data were analyzed via descriptive statistics, factor analysis, a one-way multivariate analysis of variance [MANOVA], and post-hoc tests. Qualitative data were analyzed using three cycles of coding: descriptive codes, axial codes and frequency …

Revisiting The Tax Treatment Of Citizens Abroad: Reconciling Principle And Practice, Michael S. Kirsch

Journal Articles

In an increasingly mobile world, the taxation of citizens living abroad has taken on increased importance. Recent international administrative developments — most notably, the weakening of foreign bank secrecy and expansion of global information sharing norms — have further raised the profile of this issue. While U.S. law traditionally has taxed U.S. citizens living abroad in the same general manner as citizens living in the United States, a number of scholars have proposed abandoning the use of citizenship as a jurisdictional basis to tax. In its place, they would apply residence-based principles — i.e., exercising full taxing rights over U.S. …