Security for Grid Services

Grid computing is concerned with the sharing and coordinated use of diverse resources in distributed "virtual organizations." The dynamic and multi-institutional nature of these environments introduces challenging security issues that demand new technical approaches. In particular, one must deal with diverse local mechanisms, support dynamic creation of services, and enable dynamic creation of trust domains. We describe how these issues are addressed in two generations of the Globus Toolkit. First, we review the Globus Toolkit version 2 (GT2) approach; then, we describe new approaches developed to support the Globus Toolkit version 3 (GT3) implementation of the Open Grid Services Architecture, an initiative that is recasting Grid concepts within a service oriented framework based on Web services. GT3's security implementation uses Web services security mechanisms for credential exchange and other purposes, and introduces a tight least-privilege model that avoids the need for any privileged network service.Comment: 10 pages; 4 figure

Sustainability in manufacturing strategy deployment

The focus of the paper is the development of a reference model for manufacturing strategy implementation. While many empirical research endeavors report the lack of vigor in implementing sustainability as a manufacturing strategy, also current popular theory-driven approaches are not sufficient to understand the dynamics and organizational barriers in implementing sustainability as a manufacturing strategy. This paper develops a reference model based on systems theory principles and the Viable System Model (VSM). The complexity-based approach helps decision-makers to manage firm-tailored sustainable manufacturing improvement programs

Governance Reform of German food safety regulation: Cosmetic or real?

Discussion of institutional changes made by the German government in response to the emergence of the first cases of BSE in Germany in 2000. Due to the establishment of a large-scale private sector quality assurance scheme, regulation moved away from publicly mandated food safety regulations toward industry-led initiatives (so-called QS system). The paper discusses whether changes in regulation, administration, and liability standards have improved the effectiveness and the allocative efficiency of German food safety regulation.standards, contested governance, quality assurance, liability, food safety regulation, QS system, regulation, Germany

Educational use cases from a shared exploration of e-books and iPads

E-books and e-book readers are becoming increasingly widely available, particularly for the general reader, and there have been many studies on their adoption. However, less is known about their use for educational and academic purposes. We report here on work carried out on e-books and e-book applications using iPads by academic and teaching staff. After considering pedagogical issues and reporting survey results, we identify a spiral of six key use case areas for e-books. This spiral of use cases moves from basic e-book use, through situational reading, e-books and learning, using multiple learning resources, collaborative/group learning, to e-book production. We discuss each of these use case areas and provide guidelines that will be of interest to practitioners and researchers alike

Survey of Security in Grid Services

This article provides a survey of Security in Grid Services coming from a study of many papers most of which were done by the Grid Forum OGSA-SEC (Open Grid Service Architecture Security) working group, GSI (Grid Security Infrastructure) working group, and Globus Alliance team and other people who contributed to Grid. It describes the best practice in terms of Grid Security Challenges, Grid Security Requirements, and the GT3 (Globus Toolkit version 3) Security Model for OGSA. Most of these were further refined in separate documents

The Complementary Perspective of System of Systems in Collaboration, Integration, and Logistics: A Value-Chain Based Paradigm of Supply Chain Management

The importance and complexity of the problems associated with coordinating multiple organizations to configure value propositions for customers has drawn the attention of multiple disciplines. In an effort to clarify and consolidate terms, this conceptual research examines both supply chain management (SCM) and system of systems (SoS) literature to postulate, from a value-chain perspective, what roles integration and collaboration play in helping supply chains satisfy customer requirements. A literature review analysis was used to identify the commonalities and differences between supply chain management and system of systems approaches to examining interfirm coordination of value creation efforts. Although a framework of integration and collaboration roles in value creation is proposed, further empirical testing of the concept is required to substantiate initial conclusions. The concepts proposed may help clarify where strategic and operational managers need to focus their efforts in coordinating supply chain member firms. The incorporation of SoS engineering into the supply chain field will draw the linkage between the constituent principles, and concepts of Systems Theory as appropriate for the supply chain management field. This is the first effort to reconcile two separate but parallel scholarship streams examining the coordination of multiple organizations in value creation. This research shows that there are some methodologies, principles, and methods from the SoS field that can supplement supply chain management research. Mainly due to a unit of analysis issue, systems based approaches have not been in the mainstream of supply chain management field development

How Leaders Think: Measuring Cognitive Complexity in Leading Organizational Change

The ability to lead complex organizational change is considered the most difficult leadership responsibility. Habitual linear thinking based on sequential procedural decision making is insufficient when responding to ambiguous and unpredictable challenges and interpreting systemic variables in the context of unforeseen problems, risks, and invisible interrelationships. The purpose of this exploratory multiple case study was to expand our understanding of the structure of the thinking employed by executive leaders as initiators and enablers of complex, large-scale organizational change. The researcher integrated knowledge of adult cognitive development and organizational leadership to examine the higher forms of reasoning abilities required for dealing with the complex and nonlinear nature of change. By using Laske‘s (2009) dialectical thought form (DTF) framework, the researcher explored the existence of dialectical thinking through structural analysis of interviews with 10 senior leaders who successfully transformed their respective organizations. Specifically, the study explored: (1) To what degree do the sponsors of organizational change engage in dialectical thinking in their work? (2) Is complexity of thinking related to complexity of sponsorship roles? (3) What phase of cognitive development must sponsors of transformational change attain to become effective change agents? (4) Does a higher level of dialectical thinking lead to more effective sponsorship of transformational, complex change? The results revealed that all 10 effective leaders were fully developed dialectical thinkers and that each one had a unique pattern of dialectical thinking. Data illustrated how metasystemic thinkers, despite their surface similarities, have deep epistemological differences that indicate profoundly different areas of strength and developmental needs. The potential application of the DTF framework as a developmental tool for expanding cognitive capabilities to deal with complex change is addressed and explored. The study opens an array of opportunities for another, richer way of looking at adult development. The electronic version of this dissertation is available in the open-access OhioLink ETD Center, www.ohiolink.edu/etd

How Leaders Think: Measuring Cognitive Complexity in Leading Organizational Change

The ability to lead complex organizational change is considered the most difficult leadership responsibility. Habitual linear thinking based on sequential procedural decision making is insufficient when responding to ambiguous and unpredictable challenges and interpreting systemic variables in the context of unforeseen problems, risks, and invisible interrelationships. The purpose of this exploratory multiple case study was to expand our understanding of the structure of the thinking employed by executive leaders as initiators and enablers of complex, large-scale organizational change. The researcher integrated knowledge of adult cognitive development and organizational leadership to examine the higher forms of reasoning abilities required for dealing with the complex and nonlinear nature of change. By using Laske‘s (2009) dialectical thought form (DTF) framework, the researcher explored the existence of dialectical thinking through structural analysis of interviews with 10 senior leaders who successfully transformed their respective organizations. Specifically, the study explored: (1) To what degree do the sponsors of organizational change engage in dialectical thinking in their work? (2) Is complexity of thinking related to complexity of sponsorship roles? (3) What phase of cognitive development must sponsors of transformational change attain to become effective change agents? (4) Does a higher level of dialectical thinking lead to more effective sponsorship of transformational, complex change? The results revealed that all 10 effective leaders were fully developed dialectical thinkers and that each one had a unique pattern of dialectical thinking. Data illustrated how metasystemic thinkers, despite their surface similarities, have deep epistemological differences that indicate profoundly different areas of strength and developmental needs. The potential application of the DTF framework as a developmental tool for expanding cognitive capabilities to deal with complex change is addressed and explored. The study opens an array of opportunities for another, richer way of looking at adult development. The electronic version of this dissertation is available in the open-access OhioLink ETD Center, www.ohiolink.edu/etd

Complex System Governance as a Framework for Asset Management

Complex system governance (CSG) is an emerging field encompassing a framework for system performance improvement through the purposeful design, execution, and evolution of essential metasystem functions. The goal of this study was to understand how the domain of asset management (AsM) can leverage the capabilities of CSG. AsM emerged from engineering as a structured approach to organizing complex organizations to realize the value of assets while balancing performance, risks, costs, and other opportunities. However, there remains a scarcity of literature discussing the potential relationship between AsM and CSG. To initiate the closure of this gap, this research reviews the basics of AsM and the methods associated with realizing the value of assets. Then, the basics of CSG are provided along with how CSG might be leveraged to support AsM. We conclude the research with the implications for AsM and suggested future research