Computer Sciences Commons^™

Confidence Weighted Mean Reversion Strategy For On-Line Portfolio Selection, Bin Li, Steven C. H. Hoi, Peilin Zhao, Vivek Gopalkrishnan

Research Collection School Of Computing and Information Systems

On-line portfolio selection has been attracting increasing attention from the data mining and machine learning communities. All existing on-line portfolio selection strategies focus on the first order information of a portfolio vector, though the second order information may also be beneficial to a strategy. Moreover, empirical evidences show that the stock price relatives may follow the mean reversion property, which has not been fully exploited by existing strategies. This article proposes a novel on-line portfolio selection strategy named ``Confidence Weighted Mean Reversion'' (CWMR). Inspired by the mean reversion principle in finance and confidence weighted online learning technique in machine learning, …

Corn: Correlation-Driven Nonparametric Learning Approach For Portfolio Selection, Bin Li, Steven C. H. Hoi, Vivekanand Gopalkrishnan

Research Collection School Of Computing and Information Systems

Machine learning techniques have been adopted to select portfolios from financial markets in some emerging intelligent business applications. In this article, we propose a novel learning-to-trade algorithm termed CO Relation-driven Nonparametric learning strategy (CORN) for actively trading stocks. CORN effectively exploits statistical relations between stock market windows via a nonparametric learning approach. We evaluate the empirical performance of our algorithm extensively on several large historical and latest real stock markets, and show that it can easily beat both the market index and the best stock in the market substantially (without or with small transaction costs), and also surpass a variety …

How Information Management Capability Influences Firm Performance, Sunil Mithas, Narayan Ramasubbu, V. Sambamurthy

Research Collection School Of Computing and Information Systems

How do information technology capabilities contribute to firm performance? This study develops a conceptual model linking IT-enabled information management capability with three important organizational capabilities (customer management capability, process management capability, and performance management capability). We argue that these three capabilities mediate the relationship between information management capability and firm performance. To test our conceptual model, we use a rare archival data set that contains actual scores from multidimensional and high-quality assessments of firms and intraorganizational units of a conglomerate business group that had adopted a model of performance excellence for organizational transformation based on the Baldrige criteria. This research …

Manipulation In Digital Word-Of-Mouth: A Reality Check For Book Reviews, Nan Hu, Indranil Bose, Yunjun Gao, Ling Liu

Research Collection School Of Computing and Information Systems

Built upon the discretionary accrual-based earnings management framework, our paper develops a discretionary manipulation proxy to study the management of online reviews. We reveal that fraudulent review manipulation is a serious problem for 1) non-bestseller books; 2) books whose reviews are classified as not very helpful; 3) books that experience greater variability in the helpfulness of their online reviews; and 4) popular books as well as high-priced books. We also show that review management decreases with the passage of time. Just like fraudulent earnings management, manipulated online reviews reflect inauthentic information from which consumers might derive wrong valuation especially for …

Fraud Detection In Online Consumer Reviews, Nan Hu, Ling Liu, Vallabh Sambamurthy

Research Collection School Of Computing and Information Systems

Increasingly, consumers depend on social information channels, such as user-posted online reviews, to make purchase decisions. These reviews are assumed to be unbiased reflections of other consumers' experiences with the products or services. While extensively assumed, the literature has not tested the existence or non-existence of review manipulation. By using data from Amazon and Barnes & Noble, our study investigates if vendors, publishers, and writers consistently manipulate online consumer reviews. We document the existence of online review manipulation and show that the manipulation strategy of firms seems to be a monotonically decreasing function of the product's true quality or the …

How Cios Overcome The Competing Values Challenge: Irish Cios’ Perspectives, Harvey Enns, Dean B. Mcfarlin, Paul B. Sweeney

MIS/OM/DS Faculty Publications

Competing values are a fact of organizational life. However, there are gaps in our understanding about how these opposing beliefs hinder influence processes. This article draws on interview data to demonstrate how Irish Chief Information Officers (CIOs) are able to convince their colleagues to support new projects within their firms in the face of competing values. Focused interviews were used to explore the influence process and the competing values phenomenon, since this type of research is at an early stage and qualitative methods and analysis serve as a rich source of theory development.

The data showed that the CIOs who …

Towards Evaluating The Quality Of A Spreadsheet: The Case Of The Analytical Spreadsheet Model, Thomas A. Grossman Jr., Vijay Mehrotra, J Sander

Business Analytics and Information Systems

We consider the challenge of creating guidelines to evaluate the quality of a spreadsheet model. We suggest four principles. First, state the domain—the spreadsheets to which the guidelines apply. Second, distinguish between the process by which a spreadsheet is constructed from the resulting spreadsheet artifact. Third, guidelines should be written in terms of the artifact, independent of the process. Fourth, the meaning of “quality” must be defined. We illustrate these principles with an example. We define the domain of “analytical spreadsheet models”, which are used in business, finance, engineering, and science. We propose for discussion a framework and terminology for …

Performance Modeling Of Distributed Collaboration Services, Toqeer A. Israr, Gregor V. Bochmann

Faculty Research & Creative Activity

This paper deals with performance modeling of distributed applications, service compositions and workflow systems. From the functional perspective, the distributed application is modeled as a collaboration involving several roles, and its behavior is defined in terms of a composition from several sub-collaborations using the standard sequencing operators found in UML Activity Diagrams and similar formalisms. For the performance perspective, each collaboration is characterized by a certain number of independent input events and dependent output events, and the performance of the collaboration is defined by the minimum delays that apply for a given output event in respect to each input event …

A Break In The Clouds: Towards A Cloud Definition, Chris Rose

Walden Faculty and Staff Publications

This paper discusses the concept of Cloud Computing to achieve a complete definition of what a Cloud is, using the main characteristics typically associated with this paradigm in the literature. More than 20 definitions have been studied allowing for the extraction of a consensus definition as well as a minimum definition containing the essential characteris- tics. This paper pays much attention to the Grid paradigm, as it is often confused with Cloud technologies. We also de- scribe the relationships and distinctions between the Grid and Cloud approaches.

Pervasive Innovation: Taking Innovation Throughout The Organization, Bonnie Bachman, Stephen O. Bozzone

Business and Information Technology Faculty Research & Creative Works

One of the fundamental tenets of management is that human capital can provide an essential competitive advantage for a business. Pervasive innovation (PI) is a process that blends strategy, structure, process, and culture to elevate product development to new heights and can provide a critical advantage. PI also encompasses new paradigms, practices, methods, and applications that support an environment of creativity and innovation that cuts across organization boundaries, both internal and external boundaries. Pervasive innovation guides the team through the ideation stage to implementation by leveraging the greater collective knowledge of the entire organization. This collaborative approach ensures that the …

A Cultural Analysis Of Information Technology Offshore Outsourcing: An Exercise In Multi-Sited Ethnography Of Virtual Work, Tara Eaton

Wayne State University Dissertations

This study is an exploration of how ethnography and anthropological analysis can provide new understanding of transnational, multi-sited research phenomena. Research focused on the work activities of one American client organization and its Indian IT service provider situated in the global virtual field of Information Technology (IT) offshore outsourcing. The Principal Investigator adapted and applied an ethnographic approach for her fieldwork in order to understand the norms, beliefs, and values about work, as well as the relationship between cultural differences and virtual communication. Dissertation findings offer new insight for anthropological discussions of globalization as well as suggest further development of …

Using Organizational, Coordination, And Contingency Theories To Examine Project Manager Insights On Agile And Traditional Success Factors For Information Technology Projects, Michael J. Doherty

Walden Dissertations and Doctoral Studies

Two dominant research views addressing disappointing success rates for information technology (IT) projects suggest project success may depend on the presence of a large number of critical success factors or advocate for agile project management as an alternative to traditional practice. However, after two decades of research, success rates remain low, and the role of critical success factors or project management approach remains unclear. The purpose of this study was to use views of experienced project managers to explore the contribution of success factors and management approach to project success. Applying organizational, coordination, and contingency theories, the research questions examined …

Transcending Technological Innovation: The Impact Of Acquisitions On Entrepreneurial Technical Organizations, Bruce Crochetiere

Walden Dissertations and Doctoral Studies

Technology firms with substantial cash reserves acquire smaller entrepreneurial firms for diversification. In 2006, 3 large firms acquired 28 organizations, with the combined deals exceeding {dollar}4.7 billion. The problem addressed in this study is that new start-up companies with innovative ideas may not mature when they are acquired by larger companies and do not fully articulate potential industry-transcending innovation. This is important because the unsuccessful integration of an acquisition can dismantle innovation and compromises economic inventiveness. Drawing from the disruptive innovation and the resource-based theories, the purpose of the quasi-experimental study was to examine the impact of acquisition by larger …

An Examination Of Small Businesses' Propensity To Adopt Cloud-Computing Innovation, Steven E. Powelson

Walden Dissertations and Doctoral Studies

The problem researched was small business leaders' early and limited adoption of cloud computing. Business leaders that do not use cloud computing may forfeit the benefits of its lower capital costs and ubiquitous accessibility. Anchored in a diffusion of innovation theory, the purpose of this quantitative cross-sectional survey study was to examine if there is a relationship between small business leaders' view of cloud-computing attributes of compatibility, complexity, observability, relative advantage, results demonstrable, trialability, and voluntariness and intent to use cloud computing. The central research question involved understanding the extent to which each cloud-computing attribute relate to small business leaders' …

Acceptance And Usage Of Electronic Health Record Systems In Small Medical Practices, Ritu Tannan

Walden Dissertations and Doctoral Studies

One of the objectives of the U.S. government has been the development of a nationwide health information infrastructure, including adoption and use of an electronic health records (EHR) system. However, a 2008 survey conducted by the National Center for Health Statistics indicated a 41.5% usage of the EHR system by physicians in office-based practices. The purpose of this study was to explore opinions and beliefs on the barriers to the diffusion of an ERH system using Q-methodology. Specifically, the research questions examined the subjectivity in the patterns of perspectives at the preadoption stage of the nonusers and at the postadoption …

Entropy In Postmerger And Acquisition Integration From An Information Technology Perspective, Gloria S. Williams

Walden Dissertations and Doctoral Studies

Mergers and acquisitions have historically experienced failure rates from 50% to more than 80%. Successful integration of information technology (IT) systems can be the difference between postmerger success or failure. The purpose of this phenomenological study was to explore the entropy phenomenon during postmerger IT integration. To that end, a purposive sample of 14 midlevel and first-line managers in a manufacturing environment was interviewed to understand how the negative effects of entropy affect the ultimate success of the IT integration process. Using the theoretical framework of the process school of thought, interview data were iteratively examined by using keywords, phrases, …

Understanding The Influence Of Blog On The Development Of Social Capital, Reza Vaezi, Gholamreza Torkzadeh, Jerry Cha-Jan Chang

Management, Entrepreneurship and Technology Faculty Research

The rapid use and application of blogs in diverse areas such as education, marketing, journalism, and human resource management in recent years underlines the need for a better understanding of the impact of this new technology on social capital. Social capital reflects the norm of reciprocity and the level of trust among individuals who connect, interact, and benefit from one another. Blog is expected to influence the extent and the scope of this interaction by providing new means of networking among people. This paper examines the relationship between blog use and social capital and reports on the results of an …

Energy Auditing Proposal, Paul Parham, Bonnie Bachman

Business and Information Technology Faculty Research & Creative Works

Executive Summary 1.1 Objectives Develop a business case for an energy audit software application that can be used on portable devices such as the iPad and reduce the time needed to complete an audit report by 50%.

Conference Marketing Research For Rolla, Missouri Chamber Of Commerce, Rebecca Mcnally, Bonnie Bachman

Business and Information Technology Faculty Research & Creative Works

This paper is used to give recommendations to the Chamber of Commerce in Rolla, Missouri to help them to better attract conferences and events. A survey given to event planners was the main method used for analyzing what Rolla needs to change to gain more of a name as a conference destination. Although this paper is specific to Rolla, Missouri, the methods used can be imitated for any rural town wishing to attract more conferences.

Scholarship In International Technical Communication, 1950-1989: A Historical Study, Xiaoyan Huang

Masters Theses

"This thesis is a study of the published scholarship in international technical communication from 1950 to 1989. It provides insight into the four decades' worth of scholarship as well as a resource for the development of present and future scholarship in international technical communication. It attempts to answer the following research questions: What did scholars of international technical communication study in each decade? What are the similarities and differences among the four decades in terms of scholarship in international technical communication? What are the strengths and weaknesses of the relevant scholarship in the four decades? What can we learn from …

The History Of Technical Communication Instruction At Missouri University Of Science And Technology: The Evolution Of A Curriculum, Elizabeth Marie Roberson

Masters Theses

"This thesis provides a written record of the history of technical communication instruction at Missouri University of Science and Technology (Missouri S&T). Beginning with the school's inception in 1871 as the Missouri School of Mines and Metallurgy (MSM) through to the year 2005, I have examined course catalogs and department files and conducted interviews to provide an overview of the evolution of technical communication instruction at this institution. To better understand this evolution, I have also provided a framework for the development of the English department from a single course in 1871 to the current Department of English and Technical …

Data-Driven Decision Making As A Tool To Improve Software Development Productivity, Mary Erin Brown

Walden Dissertations and Doctoral Studies

The worldwide software project failure rate, based on a survey of information technology software manager's view of user satisfaction, product quality, and staff productivity, is estimated to be between 24% and 36% and software project success has not kept pace with the advances in hardware. The problem addressed by this study was the limited information about software managers' experiences with data-driven decision making (DDD) in agile software organizations as a tool to improve software development productivity. The purpose of this phenomenological study was to explore how agile software managers view DDD as a tool to improve software development productivity and …

Green Banking, Amy Kalloch, Bonnie Bachman

Business and Information Technology Faculty Research & Creative Works

Executive Summary Green banking is generally defined as promoting environmentally friendly practices that aid customers in reducing their carbon footprint through their banking operation activities. These practices include such things as online banking, statements, bill payments, and account opening. Banks also invest in internal initiatives to reduce their own carbon footprint. The majority of programs consist of energy efficiency, recycling, ride sharing, and environmentally friendly lending. Banks that support the local community and environment are seen as leaders in this movement. Many online banks and smaller community banks are seen as 'greener' than the large corporate financial institutions. One criticism …

Plastic Packaging: A Current Perspective On Sustainability, Shristy Bashyal, Bonnie Bachman, Margaret H. Baumann

Business and Information Technology Faculty Research & Creative Works

Packaging producers, machine manufacturers, and/or resin manufacturers are studied to conduct case study research to assess the issues they are facing with regard to “sustainability”. This industry viewpoint is conducted to generate information regarding environmental pressures facing these companies and the resulting strategies employed to be competitive and sustainable. To collect the necessary information about these selected companies and the overall industry point of view they represent, direct interview techniques are used.

The Effect Of Interactive Technology On Informal Learning And Performance In A Social Setting, Timothy Clay Boileau

Wayne State University Dissertations

This study is based on a qualitative multiple case study research design using a mixed methods approach to provide insight into the effect of interactive technology on informal learning and performance in a social business setting inhabited by knowledge workers. The central phenomenon examined is the variance in behavioral intention towards interactive Web 2.0 technologies in learning and performance-related activities, depending on social and cultural setting, observable in individual and group usage patterns.

The theoretical foundation for this study is drawn primarily from the activity theory model developed by Engeström (1987) and related research enabled by an ongoing review of …

An Empirical Study On User Acceptance Of Simulation Techniques For Business Process, Olurotimi Adeboye Ladeinde

Walden Dissertations and Doctoral Studies

Non acceptance of technology may result in serious damages to organizations. For example, non acceptance of simulation technology cost Merrill Lynch Bank over {dollar}50 billion in 2008, while statistics in 2 separate studies showed that non acceptance of technology was responsible for a 57% decrease in performance level for physicians practicing in public tertiary hospitals in Hong Kong, and a 39% decrease in productivity for hotel workers in Seoul, Korea. The problem addressed in this research was non acceptance of simulation technology by project managers. This research investigated the correlation among personal innovativeness, organizational innovativeness, perceived usefulness, perceived ease of …

The Potential Role Of Business Intelligence In Church Organizations, Charmaine Felder

Walden Dissertations and Doctoral Studies

Business intelligence (BI) involves transforming data into actionable information to make better business decisions that may help improve operations. Although businesses have experienced success with BI, how leaders of church organizations might be able to exploit the advantages of BI in church organizations remains largely unexplored. The purpose of the phenomenological study was to explore the perceptions of pastoral leaders concerning the potential usefulness of BI in church organizations. Conceptual support for the study was based on the premise that churches may also benefit from BI that helps improve decision making and organizational performance. Three research questions were used to …

Learning Without Onboarding: How Assessing And Evaluating Learning Benefits New Information Technology Hires, Dory L. Morris

Walden Dissertations and Doctoral Studies

Onboarding ensures learning success through sharing and acquiring knowledge to remain competitive. However, little is known about new Information Technology (IT) hires' learning needs in the absence of onboarding; therefore, the purpose of this case study was to examine, increase, and retain their technical knowledge at the Unified Communications Company (UCC). Following the theoretical model of knowledge management, which holds that knowledge is the key to confirm learning and knowledge sharing, the research questions were used to examine how the company assessed and increased their technical knowledge and how they taught their culture in the absence of onboarding. A qualitative …

Asset Reuse Of Images From A Repository, Deirdre Herman

Walden Dissertations and Doctoral Studies

According to Markus's theory of reuse, when digital repositories are deployed to collect and distribute organizational assets, they supposedly help ensure accountability, extend information exchange, and improve productivity. Such repositories require a large investment due to the continuing costs of hardware, software, user licenses, training, and technical support. The problem addressed in this study was the lack of evidence in the literature on whether users in fact reused enough digital assets in repositories to justify the investment. The objective of the study was to investigate the organizational value of repositories to better inform architectural, construction, software and other industries whether …

Editorial: Special Issue On Ubiquitous Electronic Commerce Systems, Robert H. Deng, Jari Veijalainen, Shiguo Lian, Dimitris Kanellopoulos

Research Collection School Of Computing and Information Systems

Ubiquitous computing is a post-desktop model of human-computer interaction in which information processing has been thoroughly integrated into everyday objects and activities. Emerging ubiquitous electronic commerce systems (UECS) are expected to be available anytime, anywhere, and using different official or personal computing devices. Systems and services such as digital libraries, on-line business transactions, mobile office and mobile TV are widely deployed. Users will be able to access these services anytime, anywhere, while using any computing device in a pervasive way.