The risk of trivial solutions in bipartite top ranking

Machine Learning - Given a sample of instances with binary labels, the bipartite top ranking problem is to produce a ranked list of instances whose head is dominated by positives. One popular...     

A study of IS assets,IS ambidexterity,and IS alignment: the dynamic managerial capability perspective

This study aims to explore how IT-business alignment can be better achieved. Drawing on the dynamic capability view, information systems (IS) alignment and IS ambidexterity are theorized as IT departments’ ordinary capability and dynamic managerial capability, respectively. Four IS assets are identified as antecedents of both IS ambidexterity and IS alignment. A research model with 14 hypotheses is tested with a sample of 162 manufacturing firms. The PLS analysis shows that IS ambidexterity can increase IS alignment in terms of operational support and that the four IS assets can affect IS alignment directly or indirectly. Implications for research and practice are provided.     

Critical IS professional activities and skills/knowledge: A perspective of IS managers

This study utilized the activity competency model to investigate the perceived importance of critical professional activities and skills/knowledge required by three levels of information system (IS) managers. Our findings indicated that the perceived importance of critical IS professional activities were significantly different among the management levels, but not significantly different for various industry types. Carrying a critical IS activity out involves the use of a number of different skills and/or knowledge. A portfolio of the professional activities and the needed skills/knowledge at each management level are identified. The results of this study have implications for IS professional development and training. They can also serve as a guideline for recruiting the right IS managers and developing IS curriculums.     

The impact of legitimacy-based motives on IS adoption success: An institutional theory perspective

Firms frequently adopt new information systems (IS). To better understand IS adoption, research has been focused on motives for an IS adoption. In this study, three legitimacy-based motives (coercive, mimetic, and normative pressure) are examined for their impact on two success determinants (i.e., project management approach and team competence) and the subsequent impact of the success determinants on IS adoption success. In a quantitative study of Australian firms, we found that coercive pressure and normative pressure influence the project management approach, whereas mimetic pressure influences team competence. Both the project management approach and team competence in turn influence IS adoption success.     

The mediating role of psychological contract breach in IS outsourcing: inter-firm governance perspective

A substantial body of previous research on the client–vendor relationship has identified inter-organizational partnerships and formal contracts as important governance mechanisms for outsourcing performance. Successful IS development through outsourcing, however, may be more dependent on the people who execute the project in the field than on inter-firm relationships and agreed-upon formalities. Among individual-level variables, the special importance of psychological contracts has recently been noted in IS literature. This study investigates the mediating role of psychological contract breach between these two firm-level governance factors and outsourcing performance. By analyzing matched responses from project managers, vendor participants, and system users, we found that the effects of explicit legal contracts and partnership quality on outsourcing outcome are fully mediated by the client's perception of breach by the vendor. This study offers an extended theoretical perspective on the governance of firm-level collaboration, especially revealing that the benefits of formal contracts and inter-organizational partnerships eventually translate into satisfactory outsourcing outcomes for system users through each party's perception of breach on the individual level. Moreover, discrepancy was observed in this study between the client and vendor regarding the impact of legal contracts on individuals’ psychological contract while that of partnership was prominent in both sides.     

从复杂系统建模角度研究网络经济测度

本文从网络经济系统属于复杂系统的角度出发,从定性到定量的综合集成分析就是测度网络经济系统的有效的系统建模方法。实践中用自组织数据挖掘及其核心技术数据分组处理方法,能有效地对网络经济进行测度。它从初始模型出发,按一定的法则经不断的筛选,使中间模型的复杂度不断增加,直至得到最优复杂度模型。     

CSFs and sources of assistance and expertise in strategic IS planning: a Singapore perspective

Strategic information systems (IS) planning is not an easy task and knowing which critical areas to manage certainly enhances IS planning success. Studies of critical success factors (CSFs) usually dealt with specific systems or management technique implementation, such as manufacturing resource planning (MRP) and total quality management (TQM). There exists little empirical research on CSFs per se in strategic IS planning. This paper is an effort to enhance existing knowledge on how strategic IS planning should be effectively managed. Using data from a survey on IS planning conducted in 1996 by the National University of Singapore, we identified and rank-ordered the CSFs in strategic IS planning in the Singapore context. We also examined the sources of assistance and expertise that companies undertaking IS planning in Singapore can tap.     

Investigating the effects of IS strategic leadership on organizational benefits from the perspective of CIO strategic roles

In this study, the effects of IS strategic leadership on organizational outcomes are examined from the perspective of CIO strategic roles. A field survey is conducted that collects data from 110 matched pairs of CIOs and business executives within organizations. Our findings suggest that strategic leadership significantly affects both organizational benefits and information system quality. Further, we found that IS quality significantly mediates the relationship between IS strategic leadership and organizational benefits. We also note that IS vision significantly moderates the relationship between IS strategic leadership and IS quality, although it does not moderate the relationship between IS strategic leadership and organizational benefits or the relationship between IS quality and organizational benefits.     

School furniture and the user population: an anthropometric perspective

The purpose of this study was to determine the relationship between reported spinal symptoms in an adolescent student population, and the match between their individual anthropometric dimensions and their school furniture. The hypothesis was that students who were too large or too small for their school furniture, i.e. with anthropometric measurements furthest from the group whose anthropometry was the 'best fit' with the furniture, would have a higher frequency of reported symptoms. From data collected from 1269 schoolchildren, reported spinal symptoms and anthropometric measures were examined. Stature measures were divided into quartiles. A standard government issue school chair and desk was measured and the anthropometric quartile of the population having the 'best fit' with the furniture was identified using standard ergonomics recommendations. Odds ratios were calculated for spinal symptoms reported within each quartile group. The first quartile group (the smallest students) was identified as having the 'best fit' with the school furniture. An overall higher odds of reporting low back pain was noted in students with anthropometric dimensions in the fourth quartile (the tallest students). While it is acknowledged that there is a multifactorial nature of causality of adolescent spinal symptoms, it is contended that the degree of mis-match between child anthropometry and school furniture set-up should be further examined as a strong and plausible associate of adolescent low back pain.     

School furniture and the user population: an anthropometric perspective

The purpose of this study was to determine the relationship between reported spinal symptoms in an adolescent student population, and the match between their individual anthropometric dimensions and their school furniture. The hypothesis was that students who were too large or too small for their school furniture, i.e. with anthropometric measurements furthest from the group whose anthropometry was the ‘best fit’ with the furniture, would have a higher frequency of reported symptoms. From data collected from 1269 schoolchildren, reported spinal symptoms and anthropometric measures were examined. Stature measures were divided into quartiles. A standard government issue school chair and desk was measured and the anthropometric quartile of the population having the ‘best fit’ with the furniture was identified using standard ergonomics recommendations. Odds ratios were calculated for spinal symptoms reported within each quartile group. The first quartile group (the smallest students) was identified as having the ‘best fit’ with the school furniture. An overall higher odds of reporting low back pain was noted in students with anthropometric dimensions in the fourth quartile (the tallest students). While it is acknowledged that there is a multifactorial nature of causality of adolescent spinal symptoms, it is contended that the degree of mis-match between child anthropometry and school furniture set-up should be further examined as a strong and plausible associate of adolescent low back pain.     

Impacts of collaborative IS on software development project success in Indian software firms: a service perspective

The collaborative work of team members has become a common occurrence in software development projects. Collaborative information systems (CIS), designed to facilitate and support teamwork, appear critical for software project success. However, the quality and convenience of the services and functions delivered by CIS have not received robust attention in academia. Hence, the current study investigates the role of the CIS service characteristics of service quality and service convenience in teamwork and software development project success using DeLone and McLean’s (D&M) Information System (IS) Success Model as the theoretical framework. This study incorporates the success indicators of teamwork quality, teamwork performance, and project success as measured by software quality and project performance. Data from 153 Indian software companies confirm that collaborative IS services, as well as teamwork quality/performance, are central to software development project success. We believe that the findings of this study will be helpful to project managers of software development firms.     

The web from a complex adaptive systems perspective

The web continues to grow at a phenomenal rate, and the amount of information on the web is overwhelming. Finding the relevant information remains a big challenge. Due to its wide distribution, its openness and high dynamics, the web is a complex system, for which we have to imagine mechanisms of content maintaining, filtering and organizing that are able to deal with its evolving dynamics and distribution. Integrating mechanisms of self-organization of the web content is an attractive perspective, to match with these requirements. Self-organized complex systems can be programmed using situated multi-agent systems with a coupling between the agents' social organization and spatial organization. This paper explores the web from a complex adaptive system (CAS) perspective. It reviews some characteristic behaviors of CASs and shows how the web exhibits similar behaviors. We propose a model and a prototype of a system that addresses the dynamic web content organization, adopting the CAS vision and using the multi-agent paradigm.     

Ensembles of label noise filters: a ranking approach

Label noise can be a major problem in classification tasks, since most machine learning algorithms rely on data labels in their inductive process. Thereupon, various techniques for label noise identification have been investigated in the literature. The bias of each technique defines how suitable it is for each dataset. Besides, while some techniques identify a large number of examples as noisy and have a high false positive rate, others are very restrictive and therefore not able to identify all noisy examples. This paper investigates how label noise detection can be improved by using an ensemble of noise filtering techniques. These filters, individual and ensembles, are experimentally compared. Another concern in this paper is the computational cost of ensembles, once, for a particular dataset, an individual technique can have the same predictive performance as an ensemble. In this case the individual technique should be preferred. To deal with this situation, this study also proposes the use of meta-learning to recommend, for a new dataset, the best filter. An extensive experimental evaluation of the use of individual filters, ensemble filters and meta-learning was performed using public datasets with imputed label noise. The results show that ensembles of noise filters can improve noise filtering performance and that a recommendation system based on meta-learning can successfully recommend the best filtering technique for new datasets. A case study using a real dataset from the ecological niche modeling domain is also presented and evaluated, with the results validated by an expert.     

The Morris worm: a fifteen-year perspective

The Morris worm was the first worm to hit the Internet and caused a disruption never seen before. In the 15 years since its appearance, have we learned our lessons ab out computer security?.     

School knowledge management framework and strategies: The new perspective on teacher professional development

During the epoch of knowledge-based economy and knowledge management, teachers must learn in order to improve professional development. The paper discusses on the problems of teacher professional development in China, and analyze on the relationship among teacher learning, teacher professional development and school knowledge management. From the perspective of schools, this study develops school knowledge management framework to facilitate teacher learning and improve teacher professional development, in the basis of this framework, schools’ knowledge management strategies are presented, and provide references for administrators of schools. The result reveals the knowledge management strategies to improve teacher professional development, including school organizational reforger and knowledge leaders, constructing learning school and organization learning culture, establishing teacher knowledge management system of teacher professional development, encouraging team learning, teaching cooperation and knowledge sharing, establishing performance assessment mechanism of knowledge applications and development.     

The IS Organization of the Future: The IT Talent Challenge

Current projections are that the demands for IS workers in the U.S. are on the verge of exceeding the supply, and IS managers are reporting increased concerns for the recruitment and retention of IT staff. The authors argue that industry and universities need to take actions today to address the projected shortfalls, and offer some guidelines for recruiting and retaining IT professionals.     

The IS Organization of the Future: The IT Talent Challenge

ABSTRACT

Current projections are that the demands for IS workers in the U.S. are on the verge of exceeding the supply, and IS managers are reporting increased concerns for the recruitment and retention of IT staff. The authors argue that industry and universities need to take actions today to address the projected shortfalls, and offer some guidelines for recruiting and retaining IT professionals.     

The roots of misalignment: Insights on strategy implementation from a system dynamics perspective

This essay advances the study of strategic alignment by explaining how and why misalignment occurs. We begin by summarizing why IT and business strategies evolve in unintended ways, a phenomenon known as strategic drift. Using the causal loop diagramming approach of system dynamics, we observe that several sources of drift, potentially resulting in misalignment, are paradoxically built into the process of strategy formation and enactment itself. These linked subprocesses involve multiple actors at multiple levels of an organization and operate to promote (or hinder) strategic alignment. This paper contributes to the literature by enumerating and modeling both the top-down processes that can promote (or hinder) strategic alignment, as well as the less-studied bottom-up processes, ultimately yielding a more nuanced, dynamic, process-oriented understanding of strategic alignment. Directions for future research include the study of alignment at the process and group levels, as well as an exploration of settings where certain types of strategic drift and misalignment yield beneficial outcomes.     

Data mining: an overview from a database perspective

Mining information and knowledge from large databases has been recognized by many researchers as a key research topic in database systems and machine learning, and by many industrial companies as an important area with an opportunity of major revenues. Researchers in many different fields have shown great interest in data mining. Several emerging applications in information-providing services, such as data warehousing and online services over the Internet, also call for various data mining techniques to better understand user behavior, to improve the service provided and to increase business opportunities. In response to such a demand, this article provides a survey, from a database researcher's point of view, on the data mining techniques developed recently. A classification of the available data mining techniques is provided and a comparative study of such techniques is presented