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Full-Text Articles in Physical Sciences and Mathematics

Journey With Ting Peng Liang In Pacific Asia Information Systems Field, J. Lee, J. Jiang, P. Chau, A. Kankanhalli, M. Nelson, W. Huang, K. Wei, C. Sia, D. Vogel, M. Myers, G. Gable, N. Shen, C. Wei, S. Hung, Keng Siau, D. Liang Jan 2022

Journey With Ting Peng Liang In Pacific Asia Information Systems Field, J. Lee, J. Jiang, P. Chau, A. Kankanhalli, M. Nelson, W. Huang, K. Wei, C. Sia, D. Vogel, M. Myers, G. Gable, N. Shen, C. Wei, S. Hung, Keng Siau, D. Liang

Research Collection School Of Computing and Information Systems

Our respectful old friend Professor Ting-Peng Liang (in short, TP) whom we loved suddenly passed away on May 20, 2021. But we cannot forget his smile and passion, and his inerasable footprints in PACIS, PAJAIS, and AIS Community. He was the founder of PACIS, founding editor-in-chief of PAJAIS, and past president of AIS to list just a few. He was the pioneer who received the first AIS Fellow and the first LEO Award from Asia Pacific. That is why the leaders of the information systems field organized the first ever special tribute session in PACIS 2021 in memory of TP


Just-In-Time Defect Identification And Localization: A Two-Phase Framework, Meng Yan, Xin Xia, Yuanrui Fan, Ahmed E. Hassan, David Lo, Shanping Li Jan 2022

Just-In-Time Defect Identification And Localization: A Two-Phase Framework, Meng Yan, Xin Xia, Yuanrui Fan, Ahmed E. Hassan, David Lo, Shanping Li

Research Collection School Of Computing and Information Systems

Defect localization aims to locate buggy program elements (e.g., buggy files, methods or lines of code) based on defect symptoms, e.g., bug reports or program spectrum. However, when we receive the defect symptoms, the defect has been exposed and negative impacts have been introduced. Thus, one challenging task is: whether we can locate buggy program prior to appearance of the defect symptom at an early time (e.g., when buggy program elements are being checked-in). We refer to this type of defect localization as “Just-In-Time (JIT) Defect localization”. Although many prior studies have proposed various JIT defect identification methods to identify …


Suspect Screening For Pesticides In Rain And Snow Using Liquid Chromatography High-Resolution Mass Spectrometry, Eve Painter, Jameson Sprankle, Alex Crawford, Jillian Morrison, Marian Frazier, Jennifer Faust Jan 2022

Suspect Screening For Pesticides In Rain And Snow Using Liquid Chromatography High-Resolution Mass Spectrometry, Eve Painter, Jameson Sprankle, Alex Crawford, Jillian Morrison, Marian Frazier, Jennifer Faust

All Faculty Articles

Pesticides are one of the only chemical contaminants that are purposefully introduced to the environment in large quantities. After application to crops, pesticides can be volatilized into the atmosphere and undergo medium to long-range transport. Through wet deposition, pesticides can be removed from the atmosphere far from their initial application site, posing a variety of environmental and health hazards, such as toxicity to terrestrial and aquatic species, crop damage, and poor air quality. Identifying pesticides and their degradation products in wet deposition is crucial to understanding how they are transported in the atmosphere. High-resolution mass spectrometry is a useful tool …


Action-Centric Relation Transformer Network For Video Question Answering, Jipeng Zhang, Jie Shao, Rui Cao, Lianli Gao, Xing Xu, Heng Tao Shen Jan 2022

Action-Centric Relation Transformer Network For Video Question Answering, Jipeng Zhang, Jie Shao, Rui Cao, Lianli Gao, Xing Xu, Heng Tao Shen

Research Collection School Of Computing and Information Systems

Video question answering (VideoQA) has emerged as a popular research topic in recent years. Enormous efforts have been devoted to developing more effective fusion strategies and better intra-modal feature preparation. To explore these issues further, we identify two key problems. (1) Current works take almost no account of introducing action of interest in video representation. Additionally, there exists insufficient labeling data on where the action of interest is in many datasets. However, questions in VideoQA are usually action-centric. (2) Frame-to-frame relations, which can provide useful temporal attributes (e.g., state transition, action counting), lack relevant research. Based on these observations, we …


The Two-Echelon Vehicle Routing Problem With Transshipment Nodes And Occasional Drivers: Formulation And Adaptive Large Neighborhood Search Heuristic, Vincent F. Yu, Minh P. K. Nguyen, Kuza Putra, Aldy Gunawan, I. Gusti Bagus Budi Dharma Jan 2022

The Two-Echelon Vehicle Routing Problem With Transshipment Nodes And Occasional Drivers: Formulation And Adaptive Large Neighborhood Search Heuristic, Vincent F. Yu, Minh P. K. Nguyen, Kuza Putra, Aldy Gunawan, I. Gusti Bagus Budi Dharma

Research Collection School Of Computing and Information Systems

This research introduces a new variant of the two-echelon vehicle routing problem (2EVRP) called the two-echelon vehicle routing problem with transshipment nodes and occasional drivers (2EVRP-TN-OD). In addition to city freighters in the second-echelon network, a set of occasional drivers (ODs) is available to serve customers. ODs are the basis of a crowd-shipping system in which crowds with planned trips are willing to take detours to deliver packages in exchange for some compensation. To serve customers, ODs collect the assigned packages at either satellite served by first-echelon trucks or transshipment nodes served by city freighters. We formulate this problem as …


A Practical Fog-Based Privacy-Preserving Online Car-Hailing Service System, Jianfei Sun, Guowen Xu, Tianwei Zhang, Mamoun Alazab, Robert H. Deng Jan 2022

A Practical Fog-Based Privacy-Preserving Online Car-Hailing Service System, Jianfei Sun, Guowen Xu, Tianwei Zhang, Mamoun Alazab, Robert H. Deng

Research Collection School Of Computing and Information Systems

Aiming for minimizing passengers’ waiting time and vehicles’ vacancy rate, online car-hailing service systems with fog computing has been deployed in various scenarios. In this paper, we focus on addressing the security and privacy issues in such a promising system by customizing a new cryptographic primitive to provide the following security guarantees: (1) private, finegrained and bilateral order matching between passengers and drivers; (2) authenticity verification of passengers’ orders in the form of ciphertext, and (3) temporal assurance of passengers’ ciphertext orders. To the best of our knowledge, no previous system has been designed to meet all three requirements. Existing …


Geostatistical Tools To Assess Shifts In Recreational Fishing, Shannon J. Burchert, Glenn A. Hyndes, Karina Ryan, Ute Mueller Jan 2022

Geostatistical Tools To Assess Shifts In Recreational Fishing, Shannon J. Burchert, Glenn A. Hyndes, Karina Ryan, Ute Mueller

Research outputs 2022 to 2026

The use of geostatistical indices to examine fishery-dependent data over time is novel. We assess the value of a range of these indices for describing trends in boat-based recreational fishing in Western Australia and areas of high effort and catches for two demersal species with varying biological characteristics, life histories and distributions. The number of blocks (10- × 10-nautical mile (~19- × 19-km) area) visited decreased by 40%, while the number of fishing trips with demersal species catch increased by 15%. Spatial indices showed a south-easterly shift in demersal catch per unit effort (CPUE) across survey years. The southerly shift …


Multimedia Security And Privacy Protection In The Internet Of Things: Research Developments And Challenges, Wencheng Yang, Song Wang, Jiankun Hu, Nickson M. Karie Jan 2022

Multimedia Security And Privacy Protection In The Internet Of Things: Research Developments And Challenges, Wencheng Yang, Song Wang, Jiankun Hu, Nickson M. Karie

Research outputs 2022 to 2026

With the rapid growth of the internet of things (IoT), huge amounts of multimedia data are being generated from and/or exchanged through various IoT devices, systems and applications. The security and privacy of multimedia data have, however, emerged as key challenges that have the potential to impact the successful deployment of IoT devices in some data-sensitive applications. In this paper, we conduct a comprehensive survey on multimedia data security and privacy protection in the IoT. First, we classify multimedia data into different types and security levels according to application areas. Then, we analyse and discuss the existing multimedia data protection …


Biodiesel Production From Castor Oil: Mixing Optimization During Transestrification, Islam M. Al-Akraa Jan 2022

Biodiesel Production From Castor Oil: Mixing Optimization During Transestrification, Islam M. Al-Akraa

Chemical Engineering

No abstract provided.


Information Communication And Technology Strategies For Improving Nonprofit Organizations’ Effectiveness, Richard T. Evans Jan 2022

Information Communication And Technology Strategies For Improving Nonprofit Organizations’ Effectiveness, Richard T. Evans

Walden Dissertations and Doctoral Studies

AbstractSome nonprofit organization leaders lack strategies to incorporate information communication and technology (ICT) into the business operations of organizations. A nonprofit organization lacking strategies involving integrating technology into their business operations decreases the likelihood of being efficient, productive, and effective. Grounded in the information technology (IT) competency model, the purpose of this qualitative single case study was to explore the ICT strategies of a nonprofit organization leader in the south suburbs of Chicago. Data were collected through semi-structured interviews, direct observations, and reviews of organizational documents. The Marshall and Rossman seven-step process was used to analyze data. Three themes emerged …


Healthcare Management Strategies For Achieving Sustainable Departmental Productivity Improvements, Timothy Hargrove Jan 2022

Healthcare Management Strategies For Achieving Sustainable Departmental Productivity Improvements, Timothy Hargrove

Walden Dissertations and Doctoral Studies

Healthcare organizations’ leaders' lack of strategies to effectively deploy and monitor departments’ productivity goals affect overall organizations’ performance. Healthcare leaders who fail to deploy and monitor departmental productivity strategies effectively are limited to enhancing healthcare organizations’ performance outcomes. Grounded in transformational leadership theory, the purpose of this qualitative multiple case study was to explore strategies healthcare organizations’ leaders use to effectively identify, deploy, and monitor departments’ goals for improving their overall organization's performance. The participants were 20 healthcare leaders who successfully demonstrated success in improving their organizations’ departmental-specific productivity performance. Data were collected using semistructured interviews and a review of …


Effects Of Indoor Air Pollutants On Childhood Asthma: African American Parents’ Perspective, Marcia Maureen Haughton Lewis Jan 2022

Effects Of Indoor Air Pollutants On Childhood Asthma: African American Parents’ Perspective, Marcia Maureen Haughton Lewis

Walden Dissertations and Doctoral Studies

AbstractIndoor air pollution has been implicated in many chronic health conditions, including childhood asthma, which is more prevalent among African American children. Children are more susceptible than adults to the effects of exposure to indoor air pollution; however, many parents may not be aware of the polluting impacts of products in their homes and are inadvertently placing their families at risk for adverse health outcomes. Understanding parents’ perceptions and experiences is essential for planning and developing educational programs and interventions for improving indoor environment management as part of asthma management in children. This descriptive phenomenological study aimed to explore parents’ …


Strategies Using Threat Intelligence To Detect Advanced Persistent Threats: A Qualitative Case Study, Melisa A. Joyner Jan 2022

Strategies Using Threat Intelligence To Detect Advanced Persistent Threats: A Qualitative Case Study, Melisa A. Joyner

Walden Dissertations and Doctoral Studies

Advanced persistent threats (APTs) targeting critical infrastructures can adversely impact human lives. Cyber security analysts are concerned with APT attacks because they make it challenging to defend critical infrastructures. Grounded in routines activity theory (RAT), the purpose of this qualitative exploratory multiple case study was to explore strategies cybersecurity analysts use to defend critical infrastructures from APT attacks. Data were collected through interviews with 8 participants and documents from two organizations. Participants were required to have experience analyzing network traffic on a critical infrastructure network, one year of cyber threat hunting experience, prior or current knowledge of cyber threat intelligence …


Exploring Critical Success Factors For Implementing It Modernization Systems In Michigan State Agencies, Luc Armand Kamdem Jan 2022

Exploring Critical Success Factors For Implementing It Modernization Systems In Michigan State Agencies, Luc Armand Kamdem

Walden Dissertations and Doctoral Studies

Since 2001, most government organizations’ IT modernization programs had failed because of ineffective implementation strategies from IT leaders. The research problem was the absence of effective strategies to modernize IT legacy systems. The purpose of this qualitative single case study was to explore effective IT modernization strategies to revolutionize IT legacy systems. The researcher sought to answer how organizations create effective strategies to modernize IT legacy systems. The study used purposeful sampling, including 13 IT leaders, IT technicians, and customers based on their experience in implementing successful IT modernization programs’ strategies. Data were collected using semi-structured interviews and agency documentation. …


Using Agile Strategies To Improve Project Success Rates, Tim Kirkland Jan 2022

Using Agile Strategies To Improve Project Success Rates, Tim Kirkland

Walden Dissertations and Doctoral Studies

Project failures can be costly to businesses, but on average, program managers’ (PMs’) success rates for managing information technology (IT) projects is less than 35%. Organizational cultures struggle to adapt to agile project management (APM) that provides stakeholder flexibility for dynamic environments. Grounded by project management theory, the purpose of this qualitative multiple case study was to explore strategies project managers use to reduce IT project failures. The participants consisted of nine project managers in the northeastern United States with APM experience managing successful IT projects. Data were collected from virtual semi-structured interviews and journal notes. Ten open-ended interview questions …


Middle School Teacher Perceptions On Implementation Of The Math Workshop Model, Donna Mack Jan 2022

Middle School Teacher Perceptions On Implementation Of The Math Workshop Model, Donna Mack

Walden Dissertations and Doctoral Studies

Mathematics achievement levels in the middle school grades have reportedly been below proficiency for students in the United States. The math workshop model has been identified as a possible approach to increase student achievement in mathematics. The purpose of this generic qualitative study, guided by Mezirow’s transformative learning theory, focused on understanding middle school teacher perceptions of the implementation of the math workshop model. The five research questions addressed middle school teacher perceptions of the implementation and influence of the math workshop and how it had transformed their understanding of teaching mathematics. Data were collected through semistructured interviews with nine …


Equipment Rental Companies Leaders’ Customer Retention Strategies, Katrell Shalaine Mcneil Jan 2022

Equipment Rental Companies Leaders’ Customer Retention Strategies, Katrell Shalaine Mcneil

Walden Dissertations and Doctoral Studies

Equipment rental business leaders that employ inadequate customer retention strategies negatively impact organizations’ performance and profitability. Improved customer retention strategies might improve key customer retention and increase market share. Grounded in the customer retention management theory, the purpose of this qualitative multiple case study was to explore strategies rental leaders use to retain customers. Participants were 10 equipment rental leaders from the Southwest Region of the United States that successfully retained their key customers through effective customer retention strategies. Data were collected using semistructured interviews and a review of materials from organizational websites regarding customer order fulfillment and technology. Through …


Optimal Domotic Systems Based On Archival Data Trend Analysis, Bettina Yvette Moore Jan 2022

Optimal Domotic Systems Based On Archival Data Trend Analysis, Bettina Yvette Moore

Walden Dissertations and Doctoral Studies

Domotics is the integration of technology into building systems. Due to the rapid growth in the use of domotic systems in recent years, the industry is struggling to establish consistency and standardization. The purpose of this archival-based qualitative case study was to identify current trends and patterns in scholarly domotic research to create an instrument to evaluate domotic systems and domotic interrelationships using bibliometric searches. The facilities management and modeling system provided the framework for the study. Archival research data were examined to identify trends and patterns in domotic research and provide visualization of domotic relationships through technology trajectory mapping …


Challenges Of Digital Privacy In Banking Organizations, Okechukwu Innocent Ogudebe Jan 2022

Challenges Of Digital Privacy In Banking Organizations, Okechukwu Innocent Ogudebe

Walden Dissertations and Doctoral Studies

As the information and technology age becomes more advanced, digital privacy flaws have become more challenging. Information technology (IT) security managers, chief information security officers, and other stakeholders in banks are concerned with identity-based authentication attacks because identity-theft attacks cause data breaches. Grounded in the protection motivation theory, the purpose of this qualitative pragmatic study was to examine strategies IT security professionals working on internet banking platforms use to mitigate identity-based authentication attacks. The study participants comprised five IT security professionals currently working in the online banking industry from the northeastern United States with at least 5 years of experience …


Challenges And Opportunities For Implementing Sustainable Wind Strategies In The Dominican Republic, Virgil J. Perez Jan 2022

Challenges And Opportunities For Implementing Sustainable Wind Strategies In The Dominican Republic, Virgil J. Perez

Walden Dissertations and Doctoral Studies

The difficulties utility managers in the Dominican Republic have implementing sustainable wind strategies threaten the ability to diversify the energy supply and reduce dependence on imported fuels. Grounded in Rogers’s diffusion of innovation theory, the purpose of this qualitative single case study was to explore strategies utility managers use to implement renewable wind energy in the Dominican Republic. The participants were five wind energy managers in the Dominican Republic. Data were collected using semistructured, face-to-face interviews and a review of company documents. Three themes emerged through thematic analysis: deconstructing the existing regulatory legal framework for renewable energy development, the fusion …


Strategies For The Reduction Of Cybersecurity Breaches In Hospitals, Donovan M. A. Pottinger Jan 2022

Strategies For The Reduction Of Cybersecurity Breaches In Hospitals, Donovan M. A. Pottinger

Walden Dissertations and Doctoral Studies

AbstractRecent cyberattacks in hospitals show the urgency of the need to enhance secure information technology (IT) infrastructure. Hospitals are statistically more at cyber risk than all the multiple industries against ransomware, malware, hacking and internal threats. Guided by routine activity theory, the purpose of this exploratory multiple case study was to explore strategies utilized by hospitals' IT security managers to reduce cybersecurity breaches associated with sensitive data. The participants were nine IT security managers from hospitals in the eastern United States. Data were collected via semistructured interviews and supporting documentation from the consenting participants and hospitals' websites. Through thematic analysis, …


The Implementation Of Advanced Digitalization In The Oil And Gas Industry, Ensieh Rezafar Jan 2022

The Implementation Of Advanced Digitalization In The Oil And Gas Industry, Ensieh Rezafar

Walden Dissertations and Doctoral Studies

AbstractThe immature advanced digitalization in the oil and gas industry can limit access to the potential value of mature progressive digitalization. Oil and gas leaders must expedite the implementation of advanced digitalization to increase organizational proficiencies and reduce costs and losses. Grounded in Pettigrew and Whipp’s dimensions of strategic change theory, the purpose of this qualitative multiple case study was to explore strategies some leaders in the oil and gas industry used to implement advanced digitalization. The participants were seven leaders in two oil service companies in North America involved in the successful implementation of progressive digitalization. Data were collected …


Strategies For Information Technology Small Business Owners To Sustain Beyond The First 5 Years, Edward Alan Rodarte Jan 2022

Strategies For Information Technology Small Business Owners To Sustain Beyond The First 5 Years, Edward Alan Rodarte

Walden Dissertations and Doctoral Studies

Small businesses are the foundation of an economy and spawn innovation, but small business owners fail at an alarming rate because they lack strategies to sustain business operations. Since 50% of small businesses fail within the first 5 years, small business sustainability research is critical to support small business owners. Grounded in entrepreneurial theory, the purpose of this multiple case study was to identify strategies information technology (IT) small business owners use to sustain operation beyond the first 5 years. The participants included four IT small business owners in the Southwestern United States who sustained operations beyond the first 5 …


Exploration Of Cybersecurity Managers’ Experiences Protecting Users’ Privacy, Emmanuel Abayomi Segun Jan 2022

Exploration Of Cybersecurity Managers’ Experiences Protecting Users’ Privacy, Emmanuel Abayomi Segun

Walden Dissertations and Doctoral Studies

The protection of individual privacy and personal data in cyberspace continues to be a problem. The research problem was that cybersecurity managers must constantly navigate between the adoption of new security laws, new applications, and the internet of things (IoT) to protect the privacy of individual users. The purpose of this descriptive phenomenological study was to explore the lived experiences of cybersecurity managers who have adopted new security laws, new applications, and the IoT to protect users’ privacy. The conceptual framework that grounded this study was protection motivation theory and cybersecurity awareness. Data were collected through telephone and web-based interviews …


Risk Management In Wastewater Treatment Policy Creation And Revision, Emily Silver Jan 2022

Risk Management In Wastewater Treatment Policy Creation And Revision, Emily Silver

Walden Dissertations and Doctoral Studies

The focus of this professional administrative study was risk management in the field of wastewater treatment. The emphasis was on the creation and revision of policies to help reduce overall agency risk factors. The guiding question for the study focused on what revisions to the client organization’s safety policy and personnel policies and procedures would decrease the agency risk. A combination of both safety and policy change theories provided the basis for the study’s conceptual framework. This blended approach allowed for a more thorough and comprehensive interpretation of the collected data. In this qualitative case study, data pertinent to risk …


Strategies For Adoption Of Innovative Information Technology For Business Performance Improvement, James Melvin Smith Jan 2022

Strategies For Adoption Of Innovative Information Technology For Business Performance Improvement, James Melvin Smith

Walden Dissertations and Doctoral Studies

Business leaders do not often consider investing in informational technology (IT) to increase performance. These business leaders lack knowledge of innovative IT adoption strategies to expand their revenue and reduce costs to sustain a competitive advantage. Grounded in the technology-organization-environment (TOE) theory, the purpose of this qualitative multiple case study was to explore IT innovation adoption strategies business leaders use to increase performance. The participants were four successful business leaders selected from finalists for international entrepreneurial awards presented annually in the Mid-Atlantic region of the United States. The data were collected using semistructured telephone interviews, media releases, and online publications. …


Increasing Nurse Leader Knowledge And Awareness Of Information And Communication Technologies, Cory Stephens Jan 2022

Increasing Nurse Leader Knowledge And Awareness Of Information And Communication Technologies, Cory Stephens

Walden Dissertations and Doctoral Studies

Due to the recent coronavirus disease (COVID-19) pandemic, rapid technological innovation and nursing practice transformation exposed a deepening divide in the knowledge and awareness of information and communication technologies (ICT) among nurses. This technological skills gap undermines the benefits of ICT to nursing practice such as increased nurse satisfaction, improved care quality, and reduced costs. Nurse leaders are positioned to promote the use of ICT among nurses but may suffer from the same knowledge deficit of ICT as their followers. Guided by Locsin’s technological competencies as caring in nursing theory, Staggers and Parks’ nurse-computer interaction framework, and Covell’s nursing intellectual …


Information Systems Management And Sustainable Urban Development: A Case Study, Endris A. Suraj Jan 2022

Information Systems Management And Sustainable Urban Development: A Case Study, Endris A. Suraj

Walden Dissertations and Doctoral Studies

Sustainable Urban Development of Ethiopia lacks strategies to implement information systems management (ISM). Lacking appropriate ISM implementation has influenced the government’s plan on the four indicators of urban sustainability - Water, Air, Climate Change, and Population Growth. Grounded in the conceptual frameworks of Technology Acceptance Model (TAM) and Diffusion Of Innovation (DOI), the purpose of this qualitative single case study aims to explore ISM for sustainable urban development in Ethiopia. The participants were 12 Development Associates (DAs) who have been participating in implementing of ISM. Data was collected through a one-to-one interview, National documents, the Environmental Protection Office of Ethiopia, …


Factors Influencing The Effectiveness Of Managing Human–Robot Teams, Theodore B. Terry Jan 2022

Factors Influencing The Effectiveness Of Managing Human–Robot Teams, Theodore B. Terry

Walden Dissertations and Doctoral Studies

Certain factors can influence the capabilities of a robot–human team by affecting their social and behavioral dynamics in a work environment. But these factors were not known due to the progressive nature of human–robot partnerships and a lack of peer-reviewed literature on the topic. This e-Delphi study aimed to identify and understand these unknown influential factors based on the participants’ insights. The overarching research question asked about the need to determine factors that might influence the effectiveness of managing human-robot teams. The basis for the conceptual framework for this study was the theory of communication used in organizational management. Twelve …


Strategies For Achieving Sustainability Of Small Business Restaurants, Tanisha Thomas-Beard Jan 2022

Strategies For Achieving Sustainability Of Small Business Restaurants, Tanisha Thomas-Beard

Walden Dissertations and Doctoral Studies

Many small business restaurant owners perform unprofitably and fail within 5 years of opening. Small business restaurant owners are concerned about sustainability as approximately 50% of small businesses that start up do not last beyond the fifth year. Grounded in the general systems theory, the purpose of this qualitative multiple case study was to explore strategies small business restaurant owners use to grow and maintain profitability to sustain business beyond 5 years. The participants were five small business restaurant owners in the Southeastern region of the United States who sustained their business beyond 5 years. The data were analyzed using …