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Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
Formal Concept Analysis For E-Learning, Ghassan Beydoun
Formal Concept Analysis For E-Learning, Ghassan Beydoun
Faculty of Informatics - Papers (Archive)
We capture student interactions in an e-learning community to construct a semantic web (SW) to create a collective meta-knowledge structure guiding students as they search the existing knowledge corpus. We use formal concept analysis (FCA) as a knowledge acquisition tool to process the students virtual surfing trails to express and exploit the dependencies between web-pages to yield subsequent and more effective focused search results. We mirror social navigation and bypass the cumbersome manual annotation of webpages and at the same time paralleling social navigation for knowledge. We present our system KAPUST2 (Keeper and Processor of User Surfing Trails) which constructs …
A Practical Geographic Ontology For Spatial Web Services, Shuai Yuan, Jun Shen, Jun Yan
A Practical Geographic Ontology For Spatial Web Services, Shuai Yuan, Jun Shen, Jun Yan
Faculty of Informatics - Papers (Archive)
The application of ontology in Web services context for dynamic discovery, autonomous composition, invocation and monitoring has been deemed as very promising in semantic Web based enterprise application integration and m-commerce. There are many initiatives aiming to realize pervasive services to enable effective enactment of better quality of services, such as sensitiveness on service locations. The traditional WSDL is hardly qualified enough to tackle new challenges such as accurate representation of the non-functional properties of services. Hence, OWL-S came up with an effectual approach to facilitating semantic service description, dynamic composition, on-the-fly execution, and many other tasks. In this paper, …
P2p Distributed Intrusion Detections By Using Mobile Agents, Dayong Ye, Quan Bai, Minjie Zhang, Zhen Ye
P2p Distributed Intrusion Detections By Using Mobile Agents, Dayong Ye, Quan Bai, Minjie Zhang, Zhen Ye
Faculty of Informatics - Papers (Archive)
Traditional hierarchical intrusion detection systems have a central manager which attracts hackers to attack and might overload when there are too many client requests. To overcome these drawbacks, some researchers suggested to apply Peer-to-Peer approaches in intrusion detection. Most current Peer-to-Peer intrusion detection systems only allow hosts to collect related information from "neighbours" (one hop hosts). The limitation of information sources may lead a system to make inaccurate decisions. In this paper, we propose a Mobile Agent Based Peer-to-Peer Distributed Intrusion Detection Framework. Agents are included in this framework to achieve intrusion detections. In addition, a mobile agent migration strategy …
A Provable Secure Id-Based Explicit Authenticated Key Agreement Protocol Without Random Oracles, Haibo Tian, Willy Susilo, Yang Ming, Yumin Wang
A Provable Secure Id-Based Explicit Authenticated Key Agreement Protocol Without Random Oracles, Haibo Tian, Willy Susilo, Yang Ming, Yumin Wang
Faculty of Informatics - Papers (Archive)
In this paper, we present an identity-based explicit authenticated key agreement protocol that is provably secure without random oracles. The protocol employs a new method to isolate a session key from key con¯rmation keys so that there is no direct usage of hash functions in the protocol. The protocol is proved secure without random oracles in a variant of Bellare and Rogaway style model, an exception to current proof method in this style model in the ID-based setting. We believe that this key isolation method is novel and can be further studied for constructing more e±cient protocols.
A Re-Examination Of A Human Femur Found At The Blind River Site, East London, South Africa: Its Age, Morphology, And Breakage Pattern, Zenobia Jacobs, Qian Wang, David L. Roberts, P V. Tobias
A Re-Examination Of A Human Femur Found At The Blind River Site, East London, South Africa: Its Age, Morphology, And Breakage Pattern, Zenobia Jacobs, Qian Wang, David L. Roberts, P V. Tobias
Faculty of Science - Papers (Archive)
ABSTRACT Modern human femoral features might have appeared in the early Middle Stone Age (156 ka to 20 ka) in South Africa, as demonstrated by the recent re-examination of a human femur fossil found at the Blind River Site, East London in the 1930s, if new dating results hold. Two optically stimulated luminescence dates from the relocated original Blind River shallow marine/estuarine deposits that contained the femur gave almost identical ages of ~120 ka, corresponding to the early part of the Last Interglacial (Oxygen Isotope Stage 5). Overall, the slender headless femur is of modern human form. The distal epiphysis …
Foundational Myths: Country And Conservation In Australia, Michael Adams
Foundational Myths: Country And Conservation In Australia, Michael Adams
Faculty of Science - Papers (Archive)
In Australia, while each state has responsibility for the creation and management of their own national park systems, overall coordination is achieved through the Commonwealth National Reserve System. The Australian systems, like many others, are essentially based on the ‘Yellowstone model’ of protected areas: government owned and managed, precise boundaries, and with people present only as visitors or rangers (Stevens 1997). The Yellowstone model had its origins in wilderness protection, and despite many changes, wilderness persists as a foundational concept for Australian national parks.
The Theory Of Quaternion Orthogonal Designs, Jennifer Seberry, K. Finlayson, S. Spense Adams, Tadeusz A. Wysocki, Tianbing Xia, Beata J. Wysocki
The Theory Of Quaternion Orthogonal Designs, Jennifer Seberry, K. Finlayson, S. Spense Adams, Tadeusz A. Wysocki, Tianbing Xia, Beata J. Wysocki
Faculty of Informatics - Papers (Archive)
Over the past several years, there has been a renewed interest in complex orthogonal designs for their application in space-time block coding. Motivated by the success of this application, this paper generalizes the definition of complex orthogonal designs by introducing orthogonal designs over the quaternion domain. This paper builds a theory of these novel quaternion orthogonal designs, offers examples, and provides several construction techniques. These theoretical results, along with the results of preliminary simulations, lay the foundation for developing applications of these designs as orthogonal space-time-polarization block codes.