A Novel Design Of An Electromagnetically Levitated Vibrational Viscometer For Biomedical And Clinical Applications,
2019
TÜBİTAK
A Novel Design Of An Electromagnetically Levitated Vibrational Viscometer For Biomedical And Clinical Applications, Ali̇ Akpek
Turkish Journal of Electrical Engineering and Computer Sciences
Accurate determination of the viscosity behavior of fluids is extremely important, especially for biomedical and clinical applications. For example, blood viscosity is used to detect cardiovascular diseases in patients. Like blood, all body fluids and biochemical solvents used in biomedical studies are very limited resources. Therefore, a viscometer that is especially focused for biomedical and clinical applications should have the ability to obtain viscosity results from a reservoir as small as possible, in a range as wide as possible and in a period of time as short as possible. The measurements must be accurate even when the fluid temperatures shift …
Evaluation Of Losses In A Secondary-Side Controlled Wireless Battery Charging System,
2019
TÜBİTAK
Evaluation Of Losses In A Secondary-Side Controlled Wireless Battery Charging System, Fahri̇ Gürbüz, Tolga Sürgevi̇l, Mutlu Boztepe
Turkish Journal of Electrical Engineering and Computer Sciences
Secondary-side controlled inductive power transfer (IPT) systems are easy to control compared to primary and dual-side control methods, and more importantly, they do not require wireless communication between primary and secondary sides. In this paper, a wireless battery charging system based on secondary-side controlled IPT is analyzed and presented in detail. The proposed control method relies on the detection of the secondary coil current and the transferred power can be fully controlled by the secondary-side active rectifier with reduced number of power switching devices. The steady-state performance of the IPT system is evaluated using a fundamental harmonic analysis method for …
A New Approach For Parameter Estimation Of The Single-Diode Model Forphotovoltaic Cells/Modules,
2019
TÜBİTAK
A New Approach For Parameter Estimation Of The Single-Diode Model Forphotovoltaic Cells/Modules, Bi̇lge Kaan Atay, Ulaş Emi̇noğlu
Turkish Journal of Electrical Engineering and Computer Sciences
Solar energy has become a popular renewable energy source, leading to wide use of photovoltaic (PV) cells/modules in energy production. For this reason, realistic modeling of PVs and determining the equivalent circuit parameters is of great importance in terms of planning and operation. Hence, in this study, an analytical model for identifying the single-diode equivalent circuit parameters; series resistance (Rs ), shunt resistance (Rp ), diode ideality factor (a), diode reverse-saturation current (Io ), and photon current (Ipv ) for PV cells/modules is developed without neglecting any term. In order to test the accuracy of the model, a number of …
A Quasi-Z-Source Active Neutral Point Clamped Inverter Topology Employingsymmetrical/Unsymmetrical Boost Modulation Control Scheme For Renewableenergy Resources, Rehan Majeed, Danial Saleem, M. Imtiaz Hussain, Muhammad Talha Gul, Muhammad Rehan Usman, Salman Majeed
Turkish Journal of Electrical Engineering and Computer Sciences
This paper proposes a bipolar quasi-Z-source active neutral point clamped inverter (QZS-ANPCI) topology. It acts as a buck/boost inverter (3-phase, 3-level) to integrate renewable energy resources under their fluctuating DC voltages. We propose a symmetrical/unsymmetrical boost modulation control technique to mitigate the DC-link unbalance voltage problem in an ANPC inverter. This worthwhile control technique exploits voltage-current closedloops on AC and DC sides to regulate the desired parameters. Moreover, the constant boost control (CBC) modulation has provided a switching sequence that generates a symmetrical/unsymmetrical full shoot-through (FST) state for boosting input DC voltage in the proposed inverter. Detailed loss and efficiency …
A Survey Of Attention Deficit Hyperactivity Disorder Identification Using Psychophysiological Data,
2019
Old Dominion University
A Survey Of Attention Deficit Hyperactivity Disorder Identification Using Psychophysiological Data, S. De Silva, S. Dayarathna, G. Ariyarathne, D. Meedeniya, Sampath Jayarathna
Computer Science Faculty Publications
Attention Deficit Hyperactivity Disorder (ADHD) is one of the most common neurological disorders among children, that affects different areas in the brain that allows executing certain functionalities. This may lead to a variety of impairments such as difficulties in paying attention or focusing, controlling impulsive behaviours and overreacting. The continuous symptoms may have a severe impact in the long-term. This paper explores the ADHD identification studies using eye movement data and functional Magnetic Resonance Imaging (fMRI). This study discusses different machine learning techniques, existing models and analyses the existing literature. We have identified the current challenges and possible future directions …
Clinical Big Data And Deep Learning: Applications, Challenges, And Future Outlooks,
2019
Old Dominion University
Clinical Big Data And Deep Learning: Applications, Challenges, And Future Outlooks, Ying Yu, Liangliang Liu, Yaohang Li, Jianxin Wang
Computer Science Faculty Publications
The explosion of digital healthcare data has led to a surge of data-driven medical research based on machine learning. In recent years, as a powerful technique for big data, deep learning has gained a central position in machine learning circles for its great advantages in feature representation and pattern recognition. This article presents a comprehensive overview of studies that employ deep learning methods to deal with clinical data. Firstly, based on the analysis of the characteristics of clinical data, various types of clinical data (e.g., medical images, clinical notes, lab results, vital signs and demographic informatics) are discussed and details …
Efficient Local Comparison Of Images Using Krawtchouk Descriptors,
2019
Eastern Kentucky University
Efficient Local Comparison Of Images Using Krawtchouk Descriptors, Julian Deville
Online Theses and Dissertations
It is known that image comparison can prove cumbersome in both computational complexity and runtime, due to factors such as the rotation, scaling, and translation of the object in question. Due to the locality of Krawtchouk polynomials, relatively few descriptors are necessary to describe a given image, and this can be achieved with minimal memory usage. Using this method, not only can images be described efficiently as a whole, but specific regions of images can be described as well without cropping. Due to this property, queries can be found within a single large image, or collection of large images, which …
Mobile Technology Deployment Strategies For Improving The Quality Of Healthcare,
2019
Walden University
Mobile Technology Deployment Strategies For Improving The Quality Of Healthcare, Won K. Song
Walden Dissertations and Doctoral Studies
Ineffective deployment of mobile technology jeopardizes healthcare quality, cost control, and access, resulting in healthcare organizations losing customers and revenue. A multiple case study was conducted to explore the strategies that chief information officers (CIOs) used for the effective deployment of mobile technology in healthcare organizations. The study population consisted of 3 healthcare CIOs and 2 healthcare information technology consultants who have experience in deploying mobile technology in a healthcare organization in the United States. The conceptual framework that grounded the study was Wallace and Iyer's health information technology value hierarchy. Data were collected using semistructured interviews and document reviews, …
Strategies To Lower Information Technology Employee Voluntary Turnover,
2019
Walden University
Strategies To Lower Information Technology Employee Voluntary Turnover, Nelson Velez
Walden Dissertations and Doctoral Studies
For information technology (IT) professionals, the average turnover rate of voluntary employees is approximately 21.5% and occurs in fewer than 5 years. The purpose of this single case study was to explore strategies IT outsourcing business executives used to retain key IT employees in the New England region of the United States. Three IT business leaders from a single organization were selected to participate because they had implemented strategies to retain key IT employees. Herzberg's 2-factor theory of motivation was used as the conceptual framework for this doctoral study. Data were collected using semistructured interviews and review of company policies …
Strategies To Improve Adoption Of The Federal Enterprise Architecture Framework,
2019
Walden University
Strategies To Improve Adoption Of The Federal Enterprise Architecture Framework, Michael John Caruso
Walden Dissertations and Doctoral Studies
The U.S. federal government spends millions of taxpayer dollars to implement the federal enterprise architecture framework (FEAF). This qualitative multiple case study extracted successful FEAF implementation strategies used by agencies in the Washington, DC, metropolitan area. The population for this study included 10 information technology (IT) planners in 3 federal agencies. Data were collected from semistructured interviews and triangulated in comparison to 33 public documents. General system theory was used as a conceptual framework for the study, and data analysis included reviews of the academic literature, thematic analysis, and member checking to identify themes and codes related to successful aspects …
Exploring Strategies To Integrate Disparate Bioinformatics Datasets,
2019
Walden University
Exploring Strategies To Integrate Disparate Bioinformatics Datasets, Charbel Bader Fakhry
Walden Dissertations and Doctoral Studies
Distinct bioinformatics datasets make it challenging for bioinformatics specialists to locate the required datasets and unify their format for result extraction. The purpose of this single case study was to explore strategies to integrate distinct bioinformatics datasets. The technology acceptance model was used as the conceptual framework to understand the perceived usefulness and ease of use of integrating bioinformatics datasets. The population of this study included bioinformatics specialists of a research institution in Lebanon that has strategies to integrate distinct bioinformatics datasets. The data collection process included interviews with 6 bioinformatics specialists and reviewing 27 organizational documents relating to integrating …
A Delphi Study Analysis Of Best Practices For Data Quality And Management In Healthcare Information Systems,
2019
Walden University
A Delphi Study Analysis Of Best Practices For Data Quality And Management In Healthcare Information Systems, Olivia L. Pollard
Walden Dissertations and Doctoral Studies
Healthcare in the US continues to suffer from the poor data quality practices processes that would ensure accuracy of patient health care records and information. A lack of current scholarly research on best practices in data quality and records management has failed to identify potential flaws within the relatively new electronic health records environment that affect not only patient safety but also cost, reimbursements, services, and most importantly, patient safety. The focus of this study was to current best practices using a panel of 25 health care industry data quality experts. The conceptual lens was developed from the International Monetary …
Relationship Between Perceived Usefulness, Ease Of Use, And Acceptance Of Business Intelligence Systems,
2019
Walden University
Relationship Between Perceived Usefulness, Ease Of Use, And Acceptance Of Business Intelligence Systems, Christina Ndiwa Sandema-Sombe
Walden Dissertations and Doctoral Studies
In retail, the explosion of data sources and data has provided incentive to invest in information systems (IS), which enable leaders to understand the market and make timely decisions to improve performance. Given that users’ perceptions of IS affects their use of IS, understanding the factors influencing user acceptance is critical to acquiring an effective business intelligence system (BIS) for an organization. Grounded in the technology acceptance model theory, the purpose of this correlational study was to examine the relationship between perceived usefulness (PU), perceived ease of use (PEOU), and user acceptance of business intelligence systems (BIS) in retail organizations. …
Factors Affecting Employee Intentions To Comply With Password Policies,
2019
Walden University
Factors Affecting Employee Intentions To Comply With Password Policies, Ernest Tamanji Anye
Walden Dissertations and Doctoral Studies
Password policy compliance is a vital component of organizational information security. Although many organizations make substantial investments in information security, employee-related security breaches are prevalent, with many breaches being caused by negative password behavior such as password sharing and the use of weak passwords. The purpose of this quantitative correlational study was to examine the relationship between employees’ attitudes towards password policies, information security awareness, password self-efficacy, and employee intentions to comply with password policies. This study was grounded in the theory of planned behavior and social cognitive theory. A cross-sectional survey was administered online to a random sample of …
Correlational Analysis Of The Relationship Among Mastery Experience, Self-Efficacy, And Project Success,
2019
Walden University
Correlational Analysis Of The Relationship Among Mastery Experience, Self-Efficacy, And Project Success, Olakunle Taofeek Lemboye
Walden Dissertations and Doctoral Studies
Project managers are important to organizational performance and survival because of their role in managing, controlling, and steering organizational projects to success. Research has shown that project failures are globally pervasive due to the shortage of experienced and well-skilled project managers. The purpose of this descriptive correlational study was to improve the current understanding of the relationships among project managers' project management experience, self-efficacy, and project success, for which the research questions were focused on in addition to the role of project management experience on self-efficacy and project success. The theoretical framework was based on the social cognitive theory. This …
Strategies To Recover From Satellite Communication Failures,
2019
Walden University
Strategies To Recover From Satellite Communication Failures, Charles Lomotey
Walden Dissertations and Doctoral Studies
In natural and manmade disasters, inadequate strategies to recover from satellite communication (SATCOM) failures can affect the ability of humanitarian organizations to provide timely assistance to the affected populations. This single case study explored strategies used by network administrators (NAs) to recover from SATCOM failures in humanitarian operations. The study population were NAs in Asia, the Middle East, Central Africa, East Africa, and West Africa. Data were collected from semistructured interviews with 9 NAs and an analysis of network statistics for their locations. The resource-based view was used as the conceptual framework for the study. Using inductive analysis, 3 themes …
Successful Strategies For Retaining Profitability In An Education-Sector It Project,
2019
Walden University
Successful Strategies For Retaining Profitability In An Education-Sector It Project, Cassandra Romae Middleton
Walden Dissertations and Doctoral Studies
Many information technology (IT) project managers (PMs) and other business leaders lack effective strategies for enhancing communication among their project team members, thereby reducing profitability and organizational cohesion. The purpose of this multiple case study was to explore communication strategies that IT PMs used to successfully complete IT mobile device projects. The conceptual framework for this study was McQuail's mass communication, Craig's communication, and Deming's profound knowledge theory. Purposive sampling method was used to identify 6 successful IT PMs and leaders who worked at 2 leading educations settings located in southeastern South Carolina. Data gathered from the semistructured interviews and …
Telehealth Implementation Strategies For Healthcare Providers,
2019
Walden University
Telehealth Implementation Strategies For Healthcare Providers, Ismaila Gbenga Olatinwo
Walden Dissertations and Doctoral Studies
The shift in the landscape of healthcare services from inpatient care to outpatient care prompts healthcare leaders to re-evaluate their strategies to boost declining revenue. Telehealth offers potential for increasing efficiency and access to care, and the acceptance of its modal quality is essential for its diffusion and adoption. The purpose of this single case study was to explore strategies that healthcare providers used to implement telehealth to increase profitability. The conceptual framework was the technology acceptance model. Data were collected through semistructured interviews and review of organizational documents. The research population comprised 4 healthcare leaders in 1 organization in …
Adoption Of Cloud Computing Services In An Illinois-Based Insurance Company,
2019
Walden University
Adoption Of Cloud Computing Services In An Illinois-Based Insurance Company, Nekerral Polk
Walden Dissertations and Doctoral Studies
The decision to adopt cloud computing services should involve business units of an insurance company as well as information technology (IT) because cloud computing services are viewed as both a technology offering and business alternative. The purpose of this qualitative exploratory case study was to explore the strategies used by IT architects of an Illinois-based insurance company when adopting cloud computing services. The theory supporting this study was the technology acceptance model. The study's population consisted of IT architects from an Illinois-based insurance company that have used strategies to adopt cloud computing services. This study's data collection included semistructured interviews …
Influential Determinants Of Internet Of Things Adoption In The U.S. Manufacturing Sector,
2019
Walden University
Influential Determinants Of Internet Of Things Adoption In The U.S. Manufacturing Sector, Ronville D. Savoury
Walden Dissertations and Doctoral Studies
Manufacturers have been hesitant to adopt Internet of things (IoT) due to a lack of understanding about the innovate characteristics, technology, organizational and environmental factors related to IoT adoption and how their organizations can apply IoT correctly. This quantitative, correlational study used a combination of diffusion of innovation theory and technology–organization–environment framework as the foundation to examine if a relationship exists between relative advantage, complexity, compatibility, technology readiness, top management support, firm size, competitive pressure, and regulatory support and IT leaders' intent to adopt IoT in U.S. manufacturing organizations. A sample of 168 information technology (IT) leaders from the U.S. …
