Journal of Universal Computer Science

Displaying 1-40 of 168 results

  • White Papers // Feb 2014

    Unsupervised Structured Data Extraction from Template-generated Web Pages

    In this paper the authors study structured data extraction from template-generated Web pages. Such pages contain most of structured data on the Web. Extracted structured data can be later integrated and reused in very big range of applications, such as price comparison portals, business intelligence tools, various mashups and etc....

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  • White Papers // Mar 2014

    A Framework for Cost-Aware Process Management: Cost Reporting and Cost Prediction

    Organizations are constantly seeking efficiency gains for their business processes in terms of time and cost. Management accounting enables detailed cost reporting of business operations for decision making purposes, although significant effort is required to gather accurate operational data. Process mining, on the other hand, may provide valuable insight into...

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  • White Papers // Mar 2014

    Automatic Authentication to Cloud-Based Services

    The authors describe the concept of automatic authentication for cloud-based services via the use of a client-centric solution for Small and Medium Enterprises (SMEs). In previous paper they have introduced the Identity Management Machine (IdMM) which is designed to handle the interaction between a client's identity directory and various cloud...

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  • White Papers // Feb 2013

    Improving Accuracy of Decision Trees Using Clustering Techniques

    Data mining is an important part of information management technology. Simply put, it is a method to extract and analyze meaningful patterns and correlations in a large relational database. In data mining, decision trees are one of the most worldwide used tools for decision support. In the emerging area of...

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  • White Papers // Feb 2013

    An Integrated MFFP-tree Algorithm for Mining Global Fuzzy Rules from Distributed Databases

    In the past, many algorithms have been proposed for mining association rules from binary databases. Transactions with the quantitative values are, however, also commonly seen in real-world applications. Each transaction in a quantitative database consists of items with their purchased quantities. The Multiple Fuzzy Frequent Pattern tree (MFFP-tree) algorithm was...

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  • White Papers // Feb 2013

    Evolutionary Fuzzy System Ensemble Approach to Model Real Estate Market based on Data Stream Exploration

    An approach to predict from a data stream of real estate sales transactions based on ensembles of genetic fuzzy systems was presented. The proposed method relies on incremental expanding an ensemble by models built over successive chunks of a data stream. The output of aged component models produced for current...

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  • White Papers // Mar 2013

    Effectiveness of Cloud Systems and Social Networks in Improving Self-directed Learning Abilities and Developing Positive Seamless Learning Perceptions

    In this paper the authors aim to analyze the conditions which affect students' perception on self-directed abilities and seamless learning using cloud systems and social network applications. A combination of qualitative and quantitative methods was used in the study. Forty teacher candidates from the Near East University who took the...

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  • White Papers // Mar 2013

    LeadFlow4LD: A Method for the Computational Representation of the Learning Flow and Data Flow in Collaborative Learning

    A computer representation of teaching-learning processes in collaborative learning settings consists of modeling not only the sequence of learning activities and educational resources as existing learning design languages propose, but also modeling both the sequence of invocations of tools needed to carry out the learning activities and the flow of...

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  • White Papers // Apr 2013

    Interactive Design System for Schools using Cloud Computing

    The design of an educational system involves a good understanding of the whole school environment in order to find the correct approach to develop a comprehensive educational system that will meet real educational needs in their operation. This paper describes a design model for an educational system based on the...

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  • White Papers // Jun 2013

    Applying Professional Solutions within the Educational Environments by Means of Cloud Computing: Coaching for Teachers

    In a world where the most used sentences is: \"The person haven't got the time...\" Information Technologies (IT) plays an important role in supporting the people's daily work, including in everyday educational settings. Such technologies can aid a complete educational system to function successfully so to help the whole school...

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  • White Papers // Jun 2013

    Initializing Matrix Factorization Methods on Implicit Feedback Databases

    The implicit feedback based recommendation problem - when only the user history is available but there are no ratings - is a much harder task than the explicit feedback based recommendation problem, due to the inherent uncertainty of the interpretation of such user feedbacks. Recently, implicit feedback problem is being...

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  • White Papers // Jul 2013

    Web Resource Sense Disambiguation in Web of Data

    In this paper the authors introduce the use of WordNet as a resource for RDF web resources sense disambiguation in Web of data and show the role of designed system in interlinking datasets in Web of data and word sense disambiguation scope. They specify the core labeling properties in semantic...

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  • White Papers // Jul 2013

    Semantic Integration of Heterogeneous Data Sources in the MOMIS Data Transformation System

    In the last twenty years, many data integration systems following classical wrapper/mediator architecture and providing a global virtual schema (a.k.a. Global Virtual View - GVV) have been proposed by the research community. The main issues faced by these approaches range from system-level heterogeneities, to structural syntax level heterogeneities at the...

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  • White Papers // Aug 2013

    Using Cloud Services to Develop Learning Scenarios from a Software Engineering Perspective

    The term \"Cloud Computing\" does not primarily specify new types of core technologies but rather addresses features to do with integration, inter-operability and accessibility. Although not new, virtualization and automation are core features that characterize cloud computing. In this paper, the authors intend to explore the possibility of integrating cloud...

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  • White Papers // Aug 2013

    Cloud Services, Interoperability and Analytics within a ROLE-enabled Personal Learning Environment

    The ROLE project (Responsive Open Learning Environments, EU 7th framework program, grant agreement no.: 231396, 2009 - 2013) was focused on the next generation of Personal Learning Environments (PLEs). A ROLE PLE is a bundle of interoperating widgets - often realized as cloud services - used for teaching and learning....

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  • White Papers // Aug 2013

    A Generic Architecture for Emotion-based Recommender Systems in Cloud Learning Environments

    Cloud technology has provided a set of tools to learners and tutors to create a virtual personal learning environment. As these tools only support basic tasks, users of learning environments are looking for specialized tools to exploit the uncountable learning elements available on the internet. Thus, one of the most...

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  • White Papers // Aug 2013

    Laboratories as a Service (LaaS): Using Cloud Technologies in the Field of Education

    Society has evolved in such a way that individuals are required to embrace constant improvements in order to be able to perform their jobs properly. Distance education is a solution to this problem, as it allows students to obtain practical knowledge without the space and time constraints of classical face-to-face...

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  • White Papers // Aug 2013

    Evaluation on Students' and Teachers' Acceptance of Widget- and Cloud-based Personal Learning Environments

    Instead of using traditional learning environments which contain tools and content of a single provider that are often owned by one specific educational organization, the presented idea of widget- and cloud-based Personal Learning Environments (PLEs) exploits a variety of existing and developing open educational sources including popular Web2.0 resources such...

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  • White Papers // Sep 2013

    Toward a Module-centralized and Aspect-oriented Monitoring Framework in Clouds

    Currently, monitoring plays an important role in managing the cloud computing environment. However, the cloud computing owners and tenants often lack the management and monitoring tools to ensure the performance, robustness, dependability, and security. To address this limitation, this paper describes the development of a lightweight module-centralized and aspect-oriented monitoring...

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  • White Papers // Oct 2013

    An Efficient Ciphertext-Policy Attribute-Based Access Control towards Revocation in Cloud Computing

    Attribute-Based Encryption (ABE) is one of the new visions for fine-grained access control in cloud computing. Plenty of paper has been done in both academic and industrial communities. However, before ABE can be deployed in data outsourcing systems, efficient enforcement of authorization policies and policy updates are the main obstacles....

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  • White Papers // Mar 2011

    Modeling Quality Attributes With Aspect-Oriented Architectural Templates

    The quality attributes of a software system are, to a large extent, determined by the decisions taken early in the development process. Best practices in software engineering recommend the identification of important quality attributes during the requirements elicitation process, and the specification of software architectures to satisfy these requirements. Over...

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  • White Papers // Feb 2011

    QoS-Based Approach for Dynamic Web Service Composition

    Web Services have become a standard for integration of systems in distributed environments. By using a set of open interoperability standards, they allow computer-computer interaction, regardless the programming languages and operating systems used. The Semantic Web Services, by its turn, make use of ontologies to describe their functionality in a...

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  • White Papers // Mar 2011

    An Aspect-Oriented Framework for Weaving Domain-Specific Concerns Into Component-Based Systems

    Software components are used in various application domains, and many component models and frameworks have been proposed to fulfill domain-specific requirements. The general trend followed by these approaches is to provide ad-hoc models and tools for capturing these requirements and for implementing their support within dedicated run-time platforms, limited to...

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  • White Papers // Mar 2011

    Nondeterministic Query Algorithms

    Query algorithms are used to compute Boolean functions. The definition of the function is known, but input is hidden in a black box. The aim is to compute the function value using as few queries to the black box as possible. As in other computational models, different kinds of query...

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  • White Papers // Mar 2011

    Improving Security Levels of IEEE802.16e Authentication by Involving Diffie-Hellman PKDS

    Recently, IEEE 802.16 Worldwide Interoperability for Microwave Access (WiMAX for short) has provided one with low-cost, high efficiency and high bandwidth network services. However, as with the WiFi, the radio wave transmission also makes the WiMAX face the wireless transmission security problem. To solve this problem, the IEEE802.16Std during its...

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  • White Papers // Mar 2011

    Service Oriented Multimedia Delivery System in Pervasive Environments

    Service composition is an effective approach for large-scale multimedia delivery. In previous works, user requirement is represented as one fixed functional path which is composed of several functional components in a certain order. Actually, there may be several functional paths (deliver different quality level multimedia data, e.g., image pixel, frame...

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  • White Papers // Apr 2011

    ORPMS: An Ontology-Based Real-Time Project Monitoring System in the Cloud

    Project monitoring plays a crucial role in project management, which is a part of every stage of a project's life-cycle. Nevertheless, along with the increasing ratio of outsourcing in many companies' strategic plans, project monitoring has been challenged by geographically dispersed project teams and culturally diverse team members. Furthermore, because...

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  • White Papers // Apr 2011

    An Ontology Based Agent Generation for Information Retrieval on Cloud Environment

    Retrieving information or discovering knowledge from a well-organized data center in general is requested to be familiar with its schema, structure, and architecture, which against the inherent concept and characteristics of cloud environment. An effective approach to retrieve desired information or to extract useful knowledge is an important issue in...

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  • White Papers // Apr 2011

    Cloud Warehousing

    Data warehouses integrate and aggregate data from various sources to support decision making within an enterprise. Usually, it is assumed that data are extracted from operational databases used by the enterprise. Cloud warehousing relaxes this view permitting data sources to be located anywhere on the world-wide web in a so-called...

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  • White Papers // Feb 2011

    Cooperation as a Service in VANETs

    Vehicular Networks, including Vehicular Ad-hoc NETworks (VANETs) and Vehicular Sensor Networks (VSNs), stimulate a brand new variety of services, ranging from driver safety services, traffic information and warnings regarding traffic jams and accidents, to providing weather or road condition, parking availability, and advertisement. 3G networks and sophisticated Intelligent Transportation Systems...

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  • White Papers // Apr 2011

    Application of Systems Modeling Language (SySML) for Cognitive Work Analysis in Systems Engineering Design Process

    At present time most system engineers do not have access to cognitive work analysis knowledge or training in terms that they could understand and apply in the system design process. This may lead to specifying systems requirements that do not account for cognitive strengths and limitations of the prospective users....

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  • White Papers // May 2011

    Usability Evaluation of a Visual Modelling Tool for OWL Ontologies

    Usability is generally regarded as ensuring that software products are effective and efficient to use from the user's perspective. Diverse aspects that ensure the usability of a software product should be assessed during the different phases in its life cycle. The goal of usability testing is to evaluate whether or...

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  • White Papers // May 2011

    Using the Affect Grid to Measure Emotions in Software Requirements Engineering

    Computer systems are designed and used by humans. And human being is characterized, among other things, by emotions. Giving this fact, the process of designing and developing computer systems is, like any other facet in the people lives, driven by emotions. Requirements engineering is one of the main phases in...

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  • White Papers // May 2011

    Multimedia Modules and Virtual Organization Website for Collaborative Research Experience for Teachers in STEM

    Wireless enabled cyber physical systems and applications, highly interactive multimedia modules, and virtual organization tools and capabilities provide attractive avenues for boosting interest and improving teaching effectiveness of STEM courses in schools. In this paper, the authors describe the Research Experience for Teachers (RET) - Hawaii program and present features...

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  • White Papers // Jul 2011

    Performance Evaluation of Snort Under Windows 7 and Windows Server 2008

    Snort is the most widely deployed Network Intrusion Detection System (NIDS) worldwide, with millions of downloads to date. PC-based Snort typically runs on either Linux or Windows operating systems. In this paper, the authors present an experimental evaluation and comparison of the performance of Snort NIDS when running under the...

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  • White Papers // Jul 2011

    RAHIM: Robust Adaptive Approach Based on Hierarchical Monitoring Providing Trust Aggregation for Wireless Sensor Networks

    In-network data aggregation has a great impact on the energy consumption in large-scale wireless sensor networks. However, the resource constraints and vulnerable deployment environments challenge the application of this technique in terms of security and efficiency. A compromised node may forge arbitrary aggregation value and mislead the base station into...

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  • White Papers // Aug 2011

    Recommending Open Linked Data in Creativity Sessions Using Web Portals With Collaborative Real Time Environment

    In this paper, the authors describe a concept of the recommender system for collaborative real time web based editing in the context of creativity sessions. The collaborative real time editing provides creativity teams of which members are physically distributed with an emulation of the synchronous collaboration where presence of the...

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  • White Papers // Sep 2011

    Software Process Definition: A Reuse-Based Approach

    Software product development has been taking advantage of reuse techniques for some decades. Concepts like software components, architectures, and product lines have been successfully applied in several contexts to develop software products, although some difficulties are still faced. Software processes have strong similarities with software products, and some researchers argue...

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  • White Papers // Oct 2011

    Achieving Transparent & Real-Time Collaboration in Co- AutoCAD Application

    In order to support the real-time collaboration between geographically distributed designers, the single-user application AutoCAD is required to be transformed transparently into groupware system by adopting fully replicated architecture. As the core issue to maintain the consistency of the distributed replicas, traditional consistency maintenance algorithms (such as Operation Transformation and...

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  • White Papers // Oct 2011

    Web Services Discovery in a Pay-As-You-Go Fashion

    Extensive effort has been brought forth to assist in web service discovery. In particular, classic Information Retrieval techniques are exploited to assess the similarity between two web services descriptions, while Semantic Web technologies are proposed to enhance semantic service descriptions. These approaches have greatly improved the quality and accuracy of...

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