Object migration in non-monolithic distributed applications

Object migration is usually applied to optimize distributed monolithic systems. In this paper, the authors investigate whether object migration can also be utilized in cooperative systems which consist of autonomous components. We show that object migration policies will not always optimize system performance. Rather they can reduce it drastically if different components apply these policies concurrently. Conventional run-time support for linguistic primitives which are usually used to express migration policies is adapted to cooperative systems. We show that two novel approaches, place-policy and reduction of attachment-transitiveness, can counter the degradation caused by conflicting policies. In order to restrict attachment-transitiveness we introduce dynamic relationships called \emph{alliances} between objects which explicitly define cooperation contexts. The effects of these modifications are evaluated by simulation

Smart object-oriented access control: Distributed access control for the Internet of Things

Ensuring that data and devices are secure is of critical importance to information technology. While access control has held a key role in traditional computer security, its role in the evolving Internet of Things is less clear. In particular, the access control literature has suggested that new challenges, such as multi-user controls, fine-grained controls, and dynamic controls, prompt a foundational re-thinking of access control. We analyse these challenges, finding instead that the main foundational challenge posed by the Internet of Things involves decentralization: accurately describing access control in Internet of Things environments (e.g., the Smart Home) requires a new model of multiple, independent access control systems. To address this challenge, we propose a meta-model (i.e., a model of models): Smart Object-Oriented Access Control (SOOAC). This model is an extension of the XACML framework, built from principles relating to modularity adapted from object-oriented programming and design. SOOAC draws attention to a new class of problem involving the resolution of policy conflicts that emerge from the interaction of smart devices in the home. Contrary to traditional (local) policy conflicts, these global policy conflicts emerge when contradictory policies exist across multiple access control systems. We give a running example of a global policy conflict involving transitive access. To automatically avoid global policy conflicts before they arise, we extend SOOAC with a recursive algorithm through which devices communicate access requests before allowing or denying access themselves. This algorithm ensures that both individual devices and the collective smart home are secure. We implement SOOAC within a prototype smart home and assess its validity in terms of effectiveness and efficiency. Our analysis shows that SOOAC is successful at avoiding policy conflicts before they emerge, in real time. Finally, we explore improvements that can be made to SOOAC and suggest directions for future work

Sustainable Development Planning of Eco-Park Koto Katik Area in Padang Panjang City

Globally, ecotourism are struggling in implementing sustainable tourism principles. It is therefore important to identify source of challenges at planning process to avoid recurring problems in the future. Such a problema is apparent in the Koto Katik Ecopark in Padang Panjang, West Sumatera, despite government efforts utilizes the enormous opportunity for ecotourism development This paper evaluates the principles of sustainable tourism development adopted in the ecopark planning process. This research is based descriptive qualitative analysis data was collected through legal documents related to the planning process of Koto Katik Ecopark development. The data analysis includes description of the koto katik eco-park area, the potential for regional development, and examination of how sustainable tourism attributes exist. This study analyzes critical issues of ecotourism sustainable developmen, objectives, principles, and characteristics of the koto katik eco-park and their comparison with relevant theories and umtimately reveals the extent to which the principles of sustainable tourism development principles are followed. The result of the study shows that planning does not meet the principles of sustainable tourism development, such as the absence of conservation programs, design of tourism activities, distribution of stakeholder power, in planning, managing, and supervising ecotourism areas, analyzing the capabilities and expertise of local human resources, as well as supporting infrastructure and technology

Object-oriented protocol hierarchies for distributed workflow systems

Distributed software systems such as groupware and workflow systems will play a key role in the near future. While numerous models which promise highly sophisticated functionality are proposed in the literature their implementation is still a difficult and very expensive task. Therefore existing systems fall far behind their promises. Entities of the workflow level are often autonomous. Consequently, they are related to each other in more than a fixed client/server configuration: they often perform their activities in collaboration. Workflow models also contain a lot of information about the system\u27s dynamics. If one uses objects as an implementation mode

A framework for analyzing changes in health care lexicons and nomenclatures

Ontologies play a crucial role in current web-based biomedical applications for capturing contextual knowledge in the domain of life sciences. Many of the so-called bio-ontologies and controlled vocabularies are known to be seriously defective from both terminological and ontological perspectives, and do not sufficiently comply with the standards to be considered formai ontologies. Therefore, they are continuously evolving in order to fix the problems and provide valid knowledge. Moreover, many problems in ontology evolution often originate from incomplete knowledge about the given domain. As our knowledge improves, the related definitions in the ontologies will be altered. This problem is inadequately addressed by available tools and algorithms, mostly due to the lack of suitable knowledge representation formalisms to deal with temporal abstract notations, and the overreliance on human factors. Also most of the current approaches have been focused on changes within the internal structure of ontologies, and interactions with other existing ontologies have been widely neglected. In this research, alter revealing and classifying some of the common alterations in a number of popular biomedical ontologies, we present a novel agent-based framework, RLR (Represent, Legitimate, and Reproduce), to semi-automatically manage the evolution of bio-ontologies, with emphasis on the FungalWeb Ontology, with minimal human intervention. RLR assists and guides ontology engineers through the change management process in general, and aids in tracking and representing the changes, particularly through the use of category theory. Category theory has been used as a mathematical vehicle for modeling changes in ontologies and representing agents' interactions, independent of any specific choice of ontology language or particular implementation. We have also employed rule-based hierarchical graph transformation techniques to propose a more specific semantics for analyzing ontological changes and transformations between different versions of an ontology, as well as tracking the effects of a change in different levels of abstractions. Thus, the RLR framework enables one to manage changes in ontologies, not as standalone artifacts in isolation, but in contact with other ontologies in an openly distributed semantic web environment. The emphasis upon the generality and abstractness makes RLR more feasible in the multi-disciplinary domain of biomedical Ontology change management

“The Personal Has Become Political”: A Secondary Teacher’s Perceptions of Her Body in the Classroom

The purpose of this paper is to examine how a secondary English teacher considered her body a personal and political matter within her professional settings. Discourse analysis of the participant’s narrative evidences that women teachers are pressured to present certain feminine and heterosexual bodies and present a similar personal life within their pedagogy. The risk in not following suit is being pushed out of the profession, a matter that can be problematic especially when a teacher undergoes personal changes counter to professional expectations. Teacher education responsibility in preparing teacher candidates for a variable professional trajectory is noted

The Independent, Vol. 13, No. 23, April 19, 1973

The Independent was a student run newspaper created in 1960 at Newark State College, now Kean University. The proceeding title was The Reflector. The editor of this issue was Betty Wetzler.https://digitalcommons.kean.edu/independent_1970-1974/1076/thumbnail.jp