Sharil Tumin

Application of Association Rules for Efficient Learning Work-Flow

This paper describes application of association rules in education. To make everything more clearly visible a graphic display of objects and attributes in a lattice structure is provided. Vectors and matrices are used to reduce the computational complexity while searching for association rules in the case when at least one attribute included in the ‘if’ part of the statement is known.

Automated discovering of what is hindering the learning performance of a student

This paper focuses on a system framework supporting personalized learning. While learning styles describe the influence of cognitive factors, learning orientations describe the influence of emotions and intentions. The system responds to students’ needs according to their learning orientations. Such a system requires cooperation among several educational organizations, since it is quite difficult for a single organization to develop an item pool of questions tailored for individuals with different learning orientations. The cooperation needs serious consideration of security issues. We propose a model for sharing protected Web resources that secures privacy.

Cooperative shared learning objects in an intelligent web-based tutoring system environment

This paper focuses on an intelligent Web-based tutorial system composed of reusable learning objects (LOs). Reusable LOs lay down the foundation for a large scale collaboration among educational organizations. LOs developed at different organizations can be used by other organizations thus providing high quality courses to all students. Expert instructors at each organization maintain a repository of LOs. For organizations owning LOs an audit trail for each LO can be easily gathered for billing purposes.

Intelligent decision support system for evaluation of ship designers

In this paper we propose application of non-classical logic in an intelligent decision support system. Decision making rules an intelligent agent is applying for evaluating a ship designers reliability are discussed in particular.

Application of Association Rules in Education

This paper is devoted to application of association rules in education. The aim is to discover association rules with some given information in the antecedent without the constraint of support threshold being involved.

Cooperative learning objects in an intelligent Web-based tutoring system

This paper focuses on an intelligent Web-based tutorial system composed of reusable learning objects (LO). Reusable LO lay down the foundation for a large scale collaboration among educational organizations. LO developed at different organizations can be used by other organizations thus providing high quality courses to all students. Expert instructors at each organization maintain a repository of LO. For organizations owning LO an audit trail for each LO can be easily gathered for billing purposes.

Partial orderings for ranking help functions

In this paper we propose ranking help functions in an intelligent tutoring system with respect to their usefulness. A help function is regarded as useful to a student if the student has succeeded to solve a problem after using it. Methods from the theory of partial orderings are further applied facilitating an automated process of suggesting individualised advises on how to proceed in order to solve a particular problem.

Collaborative role management for sharing protected Web resources

In this paper we consider a security framework for sharing protected Web resources among independent organizations using groups and roles. Very important components of our model are a collaborative, distributive management of user membership in a group in one organization, resources management by the service provider and security enhancement. Each organization manages its own users and groups independently of others. User authentication and user authorization on a protected resource in one organization is determined by user group membership of other organizations. Collaboration is based on mutual trust, agreed upon common policies.

Lattices and collaborative design in shipbuilding

Outsourcing and offshoring have become viable strategies of global firms. The success and necessity of usage of these strategies is stipulated by quick development in information and communication technologies. The prior research has shown that firms which use offshoring have better chances to survive than firms which rely solely on domestic suppliers and performing works in-house. The paper considers issues of cooperative ship design grounded on a strategy of flexible sourcing, when the firm rationally combines outsourcing and insourcing strategies. The mathematical method of formal concept analysis is applied to visualise and analyse firms insourcing and outsourcing strategies. An example is presented to illustrate application of the concept lattice in decision support regarding sourcing of a Norwegian ship design firm.

Positive and negative authorizations to access protected web resources

In this paper we present a model that can prevent conflict situations caused by applying both positive and negative authorizations for access to a resource. Such conflict situations may occur if an organization has decentralized administration, and/or several collaborating organizations have access to one resource and some of them apply positive authorizations while others apply negative authorizations. The proposed solution involves Belnaps logic.