Digital Commons Network^™

Multi-Stage Transfer Learning System With Light-Weight Architectures In Medical Image Classification, Rajesh Godasu, Omar F. El-Gayar, Kruttika Sutrave

Research & Publications

Transfer Learning methods are extensively applied with standard CNN architectures for various medical diagnoses. However, these architectures are computationally expensive, tend to be over parameterized, and requires a relatively large labeled datasets which are often not available in the medical image domain. Accordingly, this paper proposes a Multi-Stage Transfer Learning System using lightweight architectures to address problems with limited data and to improve training time. Preliminary results suggest that our model performed well on CT Head images over traditional single-stage transfer learning.

Transformational Leadership, Transactional Leadership, Organizational Cultural Behaviors And Effectiveness Of Knowledge Management Practices In Higher Educational Institutions, Armel Djangone, Omar F. El-Gayar

Research & Publications

The purpose of this emerging research paper is to examine the relationship between transactional leadership, transformational leadership, cultural behavior and knowledge management (KM) effectiveness in the context of higher education. Consequently, the research examines the moderating effect of organizational culture on the relationship between leadership and knowledge management.

Topical Mining Of Malaria Using Social Media. A Text Mining Approach, James Boit, Omar F. El-Gayar

Research & Publications

Malaria is a life-threatening parasitic disease, common in subtropical and tropical climates caused by mosquitoes. Each year, several hundred thousand of people die from malaria infections. However, with the rapid growth, popularity and global reach of social media usage, a myriad of opportunities arises for extracting opinions and discourses on various topics and issues. This research examines the public discourse, trends and emergent themes surrounding malaria discussion. We query Twitter corpus leveraging text mining algorithms to extract and analyze topical themes. Further, to investigate these dynamics, we use Crimson social media analytics software to analyze topical emergent themes and monitor …

The Effect Of Privacy Policies On Information Sharing Behavior On Social Networks: A Systematic Literature Review, Damion Mitchell, Omar F. El-Gayar

Research & Publications

Online social networks (OSN) such as Facebook and Instagram have dramatically changed the way people operate. It, however, raises specific privacy concerns due to their inherent handling of personal data. The paper highlights the privacy concerns associated with OSN, strategies to protect the users’ privacy, and finally the overall effect of privacy policies on information sharing behavior on OSN. We examined a sample of 51 full papers that explore privacy concerns in OSN, strategies to protect users’ privacy, and the effects of privacy policies on the users’ information sharing behavior. The overall findings disclosed that users are concerned about their …

Cultural Influence And The Effective Use Of Security Awareness In Congolese Organizations, Arnold Nzailu, Insu Park

Research & Publications

In today’s global economy, there is a growing need to apply technological advancements as well as training and awareness materials from western countries on information security programs in developing nations. To understand the underlying drivers of employees’ effective use behaviors in relation to security awareness programs in organizations, this study examines the extrinsic and intrinsic motivation factors that influence employees located in developing nations. The results indicate that influencing employees’ attitudes toward security is a better predictor of employees’ effective use of security awareness programs than their intention to comply. Cultural effects has also proven to have an influence on …

Using Social Media For Customer Knowledge Management In Developing Economies: A Systematic Review, Martinson Ofori, Omar El-Gayar

Research & Publications

Knowledge Management (KM) research has theorized that KM activities lead to better firm performance. The current view that there is more external knowledge than exists within organizations has resulted in a preference for customercentric approaches over traditional KM activities. Recent advances in technology has resulted in social media use as an avenue for knowledge creation from the social interaction between brands and their customers. Most research however explore social media’s impact on organizational knowledge in developed economies with little attention to developing economies where KM could be conceptualized differently. In this research, we analyze the extent to which social media …

Matching Possible Mitigations To Cyber Threats: A Document-Driven Decision Support Systems Approach, Martha Wagner Mcneil, Cherie Noteboom, Jun Liu, Omar El-Gayar, Thomas H. Llansó

Research & Publications

Despite more than a decade of heightened focus on cybersecurity, the threat continues. To address possible impacts, cyber threats must be addressed. Mitigation catalogs exist in practice today, but these do not map mitigations to the specific threats they counter. Currently, mitigations are manually selected by cybersecurity experts (CSE) who are in short supply. To reduce labor and improve repeatability, an automated approach is needed for matching mitigations to cyber threats. This research explores the application of supervised machine learning and text retrieval techniques to automate matching of relevant mitigations to cyber threats where both are expressed as text, resulting …

Designing Decision-Support Systems For Secondary School Counselors, Kodey S. Crandall, Cherie Noteboom, Dave Bishop

Research & Publications

In the current era of accountability, school counselors are expected to use data to drive program decisionmaking, implement evidence-based interventions to create systemic change, and utilize emerging technology. Research shows it is difficult for school counselors to meet any of these expectations. A decision-support system is a technology that takes minimal effort to learn and can assist in decision-making processes. In an attempt to solve the problems facing school counselors, this design science research focuses on building such a system using the design principles of Information Quality, Interface Quality, and Customization and measuring their influence on user satisfaction.

Factors Influencing The Adoption Of Artificial Intelligence In Organizations - From An Employee's Perspective, Loknath Sai Ambati, Kanthi Narukonda, Giridhar Reddy Bojja, Dave Bishop

Research & Publications

Artificial intelligence (AI) is set to take over the world in the next decade. Our current innovations and inventions are gearing up to clear the path for this to happen. While folks are excited and curious about this shift, it remains unclear how organizations and their employees feel about it. The goal of this research is to understand the factors that influence the adoption of AI techniques and technologies in organizations from an employee's perspective. To achieve this goal, the authors make use of grounded theory and semi-structured interviews. Discovering the positive or negative emergent factors that affect the adoption …

Byod-Insure Vs Existing Modalities For Byod Security Assessment: A Comparison Study, Melva Ratchford, Yong Wang, Cherie Noteboom, Omar F. El-Gayar

Research & Publications

Often, organizations allow employees the use of their personally owned devices to access corporate data. This phenomenon is identified as Bring Your Own Device (BYOD), and organizations are adopting it without taking into consideration the inherent security risks introduced via BYODs. There are several approaches that organizations can consider for BYOD security. This paper addresses research questions related to the protection of BYOD environments. In general, how can organizations protect against the inherent risks posed by BYODs? What are existing modalities to do so? With this in mind, this research reviews existing BYOD security approaches, such as frameworks, checklists, best …

A Systematic Review Of Web Usage Mining Techniques And Future Research Options, Brent Van Aartsen, Omar F. El-Gayar, Cherie Noteboom

Research & Publications

Through this systematic review, we review the research of web usage mining (WUM) techniques from 2014 - 2019 in order to understand the current state of WUM research and answer our research questions; (RQ1) what data sources are used in web usage mining, (RQ2) what data analysis methods are used to extract the knowledge, (RQ3) what are the applications of Web usage mining, and (RQ4) what future research can be done in the web usage mining area? Using a PRISMA approach to narrow the initial 778 search results, we completed a full analysis of 74 unique articles from four prominent …

Nonreciprocal Cavities And The Time-Bandwidth Limit: Reply, Sander A. Mann, Dimitrios L. Sounas, Andrea Alù

Advanced Science Research Center

We reply to the comment on our recent article [Optica 6, 104 (2019)], in which we demonstrated that nonreciprocal cavities comply with the resonance time-bandwidth limit. We fully stand by our original claims and further elucidate how breaking of reciprocity is not required to achieve the large field enhancements and time-bandwidth products observed in the comment and our article. We also further clarify that these hotspots do not overcome the conventional time-bandwidth limit.

Thei Student Applied Research Presentations Sarp 2020, Research Office, Technological And Higher Education Institute Of Hong Kong

THEi Student Applied Research Presentations (SARP)

No abstract provided.

Interactive Ecosystem For Surgical Training In A Realistic Mixed-Reality, Ehsan Azimi

Link Foundation Modeling, Simulation and Training Fellowship Reports

In many surgical procedures, surgeons rely on their general knowledge of anatomy and relatively crude measurements, which have inevitable uncertainties in locating internal anatomical targets. One example procedure that is frequently performed in neurosurgery is ventriculostomy (also called external ventricular drainage), where the surgeon inserts a catheter into the ventricle to drain cerebrospinal fluid (CSF). In this procedure, often performed bedside and therefore without image guidance, the surgeon makes measurements relative to cranial features to determine where to drill into the skull and then attempts to insert a catheter as perpendicular to the skull as possible. Although it is one …

Antitrust In Attention Markets: Objections And Responses, John M. Newman

Articles

The modern antitrust enterprise finds itself under attack. Critics complain that enforcement agencies have done nothing to stem an ever-rising tide of market concentration and corporate power. At the center of this critique lies Silicon Valley, home of a new generation of tech giants.

This symposium contribution contends that attention markets represent the largest sector of the modern economy to have gone unnoticed by antitrust regulators. If it is to fulfill its congressional mandate, the antitrust enterprise must begin paying attention to attention markets. A number of objections to this straightforward point have been raised, but each collapses under close …

The Marshall-Olkin Exponentiated Generalized G Family Of Distributions: Properties, Applications, And Characterizations, Haitham M. Yousof, Mahdi Rasekhi, Morad Alizadeh, Gholamhossein Hamedani

Mathematical and Statistical Science Faculty Research and Publications

In this paper, we propose and study a new class of continuous distributions called the Marshall-Olkin exponentiated generalized G (MOEG-G) family which extends the Marshall-Olkin-G family introduced by Marshall and Olkin [A. W. Marshall, I. Olkin, Biometrika 84 (1997), 641-652]. Some of its mathematical properties including explicit expressions for the ordinary and incomplete moments, generating function, order statistics and probability weighted moments are derived. Some characteristics of the new family are presented. Maximum likelihood estimation for the model parameters under uncensored and censored data is addressed in Section 5 as well as a simulation study to assess the performance of …

Nations And Markets, Harlan G. Cohen

Faculty Scholarship

Economics and security seem increasingly intertwined. Citing national security, states subject foreign investments to new scrutiny, even unwinding mergers like the purchase of Grindr or the creation of TikTok. The provision of 5G has become a diplomatic battleground – Huawei at its center. Meanwhile, states invoke national security to excuse trade wars. The U.S. invoked the GATT national security exception to impose steel and aluminum tariffs, threatening more on automotive parts. Russia invoked that provision to justify its blockade of Ukraine, as did Saudi Arabia and the UAE to excuse theirs of Qatar. And with the spread of COVID-19, states …

Texture Evolution Induced By Twinning And Dynamic Recrystallization In Dilute Mg-1sn-1zn-1al Alloy During Hot Compression, Meijuan Hao, Weili Cheng, Lifei Wang, Ehsan Mostaed, Liping Bian, Hongxia Wang, Xiaofeng Niu

Michigan Tech Publications, Part 1

Texture evolution of an extruded dilute Mg-1Sn-1Zn-1Al alloy was thoroughly investigated based on the twinning and dynamic recrystallization (DRX) behavior via hot compression at a strain rate of 10 s−1 and temperature of 225°C. It was found that the types and intensities of the texture are strongly dependent on the fraction of twins and DRX modes as well as regions where sub-grain boundaries (sub-GBs) are intensively accumulated. At the initial stage of deformation, the formation of compression direction (CD)-tilted basal texture was mainly determined by the occurrence of {101¯2} extension twins. As the strain increases, the variation in the texture …

Structure, Formation, And Biological Interactions Of Supported Lipid Bilayers (Slb) Incorporating Lipopolysaccharide, Palak Sondhi, Dhanbir Lingden, Keith Stine

Chemistry & Biochemistry Faculty Works

Biomimetic membrane systems play a crucial role in the field of biosensor engineering. Over the years, significant progress has been achieved creating artificial membranes by various strategies from vesicle fusion to Langmuir transfer approaches to meet an ever-growing demand for supported lipid bilayers on various substrates such as glass, mica, gold, polymer cushions, and many more. This paper reviews the diversity seen in the preparation of biologically relevant model lipid membranes which includes monolayers and bilayers of phospholipid and other crucial components such as proteins, characterization techniques, changes in the physical properties of the membranes during molecular interactions and the …

Semi-Annual Progress Report #6, Missouri University Of Science And Technology. Inspire - University Transportation Center

Semi-Annual Progress Reports

No abstract provided.

Synthesis And Characterization Of Pvp Based Catalysts For Selected Application In Catalysis, Hany A. Elazab, Mohamed N. Ayad, Mohamed M. Hammam, Mostafa A. Radwan, Mohamed A. Sadek

Chemical and Biochemical Engineering Faculty Research & Creative Works

This research aims to study the catalyst activity in specific reactions and the characteristics of the catalyst in order to optimize its performance. This research investigates PVP based catalysts and their properties and applications. PVP was prepared in combination with different metal oxides in order to be tested for different catalytic applications including dye removal. Methyl orange was used as a dye and different concentrations were tested against different metallic ions in order to optimize the catalyst for being used in dye removal applications. Spectrophotometer was used to calculate the concentration of the dye before and after catalyst exposure and …

Media Literacy, Scientific Literacy, And Science Videos On The Internet, Sonny Rosenthal

Research Collection College of Integrative Studies

Although video is not a new format for communicating about science, video-sharing platforms have democratized the process. Individuals who wish to share information or ideas about science can use these platforms to connect with potentially large and diverse audiences. This has benefits and drawbacks. The benefits are related to increased access to scientific information and greater public engagement with science. The drawbacks are related to communication within echo chambers and the spread of misinformation. This mini-review presents these benefits and drawbacks with respect to the science video landscape and media and scientific literacies. It concludes with a brief synthesis of …

Factors Impacting The Transport And Enhanced Oil Recovery Potential Of Polymeric Nanogel In Sandstone, Haifeng Ding

Doctoral Dissertations

"Enhanced oil recovery (EOR) using nanometer-sized particles has drawn great attention in the oil industry because of their various advantages brought by size. However, their applications on a field scale are very limited, especially for deformable nanoparticles. The objective of this research is to explore the transport behavior of deformable polymeric nanoparticles (nanogel), the factors impacting these behavior, and their EOR potentials. First, 240 published nanoparticle core flooding experiment data were collected and analyzed about the extent to what the nanoparticles can improve oil recovery. Results show that on the laboratory scale the incremental oil recovery could be as high …

Characterization And Recyclability Of 304l Stainless Steel Powder For Use In The Selective Laser Melting Process, Austin Taylor Sutton

Doctoral Dissertations

"Powder-bed fusion refers to a subset of additive manufacturing (AM) methods which successively melts and solidifies selected regions within a powder bed on a layer-by-layer basis to construct components directly from computer-aided design files. Laser Powder-Bed Fusion (L-PBF) is a process among the powder-bed fusion techniques that utilizes a laser to consolidate particles into a material with little porosity. During the L-PBF process, the large energy input from the laser causes the production of ejecta in the form of laser spatter and condensate, both of which have the potential to settle in the surrounding powder bed compromising its reusability. In …

Studies On The Stability Of Plasma Proteins And Their Fragments, Paul Praveen Nakka

Doctoral Dissertations

“The stability of a protein-based biological drug is an important concern during processing, storage or patient administration. There are various forces which contribute to the stabilizing of proteins. Both hydrogen bonds and hydrophobic interactions play an important role in protein stability. Improper folding or misfolding of proteins leads to aggregation, which is a major problem found in the bioprocessing industry. The objectives of this research are: 1) to determine the effect of environmental factors such as pH, temperature, additives or salts, and cosolvents on the stability human serum albumin (HAS), which is the most abundant protein in plasma, 2) to …

Development Of Novel Materials And Processes For Direct Conversion Of Co₂ Flue Gas To Chemicals And Fuels, Ahmed Al-Mamoori

Doctoral Dissertations

“This research focused on addressing the pressing issues of greenhouse gas emissions that greatly contribute to climate change. Specifically, the focus was given to the reduction of anthropogenic CO₂ emission and its subsequent conversion to commodity chemicals and fuels. In the first part of the research, a series of novel high temperature CO₂ adsorbents including double salts (K-Ca and Na-Ca) and metal-doped calcium oxide (Fe_x@CaO and Ga_x@CaO) was developed and evaluated. Both sets of materials exhibited high CO₂ capacity, fast kinetics, and long-term stability. In particular, at 650 °C, the doped adsorbents comprising …

Regulation Of Derivatives In Asia: When Technology Meets Financial Engineering, Christopher C. H. Chen

Research Collection Yong Pung How School Of Law

This chapter introduces the current state of derivatives market regulation in Asia following the global financial crisis. It focuses on Singapore and Hong Kong, the two largest international financial centres in the region. Singapore and Hong Kong have adopted international regulatory reforms, including mandatory trade reporting, centralized clearing, exchange trading requirements and the initial margin rule. The implementation has varied greatly because reporting requirements and initial margin rules have been implemented whereas clearing and trading requirements are waiting for full implementation. The arrival of financial technology may help Asian regulators oversee derivatives markets, by improving cross-border information sharing, reporting or …

From Coronation To Coronavirus: Covid-19, Force Majeure And Private International Law, King Fung Tsang

Fordham International Law Journal

No abstract provided.

Modeling And Optimization Of Froth Flotation Of Low-Grade Phosphate Ores: Experiments And Machine Learning, Ashraf Alsafasfeh

Doctoral Dissertations

”In this research work, bench-scale and micro-scale flotation tests were conducted to separate “minerals from silicate minerals using direct and reverse flotation approaches, respectively. Experiments were conducted at different flotation conditions including reagents’ type, reagents’ dosages, pulp’s pH, and flotation time.

In the direct flotation process, two polymers were selected to promote the depression of silicates: hybrid polyacrylamide-based polymers (Hy-PAM) and chitosan. Results indicated that the highest recovery of P₂O₅ (86.82%) was obtained when the Hy-PAM polymer was used compared with 66.7% and 40% when chitosan and commercial inorganic depressant were used, respectively. The experimental datasets obtained …

Complicity And Climate Change, Shalomita Kristanugraha

Graduate Student Theses, Dissertations, & Professional Papers

As individuals, how should we understand our personal complicity in climate change related harms? In this thesis, I argue that the predominant way we think of complicity within the Western moral paradigm—that is, as a distribution problem—is inadequate in helping us understand the nature of our complicity in climate change related harms. This inadequacy, in turn, psychologically hampers individual citizens residing in high-emitting nations of the Global North from effective and sustainable social and political engagement with climate change. To address the inadequacy and obstructions that result from it, I follow the discussion between Christopher Kutz and Iris Marion Young …