The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform
David J. Duke - One of the best experts on this subject based on the ideXlab platform.
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Integrating user and Computer System concerns in the design of interactive Systems
International Journal of Human-Computer Studies, 1997Co-Authors: Ann Blandford, David J. DukeAbstract:In any design process, there are different perspectives that need to be accommodated. For the design of interactive Systems, two of these are that of the Computer System Designer and that of the end user. The focus of this paper is on tools or notations to support the integration of these different perspectives?in particular, System modelling and theory-based user modelling. There are few established techniques for doing such integration; those that there are generally involve a loose coupling between the description of the System and that of the user, or are skewed towards one or other of these viewpoints. Recently, techniques that deal with the System and user more symmetrically have emerged. We focus, in particular, on techniques that have been developed and investigated within a large European project, Amodeus. These allow the analyst to explore properties of the conjoint System, and to investigate how the properties of the interaction relate to those of the individual agents. However, there is a trade-off, which can be characterized as increased power to critique a design being offset against reduced generality in the design perspectives that can be considered using the technique. We argue that while such techniques require a high initial investment, technological advances make the need for such integrated approaches urgent. We consider what resources each class of technique demands and what kinds of results each yields.
Ann Blandford - One of the best experts on this subject based on the ideXlab platform.
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Integrating user and Computer System concerns in the design of interactive Systems
International Journal of Human-Computer Studies, 1997Co-Authors: Ann Blandford, David J. DukeAbstract:In any design process, there are different perspectives that need to be accommodated. For the design of interactive Systems, two of these are that of the Computer System Designer and that of the end user. The focus of this paper is on tools or notations to support the integration of these different perspectives?in particular, System modelling and theory-based user modelling. There are few established techniques for doing such integration; those that there are generally involve a loose coupling between the description of the System and that of the user, or are skewed towards one or other of these viewpoints. Recently, techniques that deal with the System and user more symmetrically have emerged. We focus, in particular, on techniques that have been developed and investigated within a large European project, Amodeus. These allow the analyst to explore properties of the conjoint System, and to investigate how the properties of the interaction relate to those of the individual agents. However, there is a trade-off, which can be characterized as increased power to critique a design being offset against reduced generality in the design perspectives that can be considered using the technique. We argue that while such techniques require a high initial investment, technological advances make the need for such integrated approaches urgent. We consider what resources each class of technique demands and what kinds of results each yields.
Ziyang Tang - One of the best experts on this subject based on the ideXlab platform.
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Comparison of Traditional Image Segmentation Algorithm
DEStech Transactions on Engineering and Technology Research, 2017Co-Authors: Ziyang TangAbstract:This research paper grants an innovative method for segmenting an image such that the pixel with same label segment has certain graphic and pictorial characteristics. As there are many approaches for segmenting an image, at this time image segmentation by dynamic region amalgamation algorithm and graph-cut algorithm are paralleled with the projected user cooperating maximal resemblance segmentation technique and outcomes have been obtained on the base of time taken and simplicity of the output obtained. Unsubstantiated image segmentation algorithms have developed to the fact where they can produce realistic segmentations, and therefore can initiate to be integrated into larger Systems. A Computer System Designer nowadays has an array of existing algorithm choices; though, rare objective numerical estimations and calculations can exist to these segmentation algorithms. The outcome of image segmentation is a set of sections that mutually cover the complete image or a set of outlines extracted from the image. Primarily an image is segmented by means of Shift-Algorithm and the user coarsely scripts the object and background regions using markers. A Computer Algorithm which creates accurate segmentation results with an inclusive array of constraints on any one image, as well as accurate segmentation outcomes on numerous images with the same parameters, will be a useful, foreseeable and easily modifiable pre-processing phase in a larger System. The effect of the investigation displays that the anticipated technique of image segmentation is superior to dynamic region integration method and graph-cut algorithm with esteem to time taken.
Maher Khemakhem - One of the best experts on this subject based on the ideXlab platform.
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Taxonomy of Structured P2P Overlay Networks Security Attacks
World Academy of Science Engineering and Technology International Journal of Computer Electrical Automation Control and Information Engineering, 2012Co-Authors: Zied Trifa, Maher KhemakhemAbstract:The survey and classification of the different secu rity attacks in structured peer-to-peer (P2P) overlay ne tworks can be useful to Computer System Designers, programmers, administrators, and users. In this paper, we attempt to provide a t axonomy of structured P2P overlay networks security attacks. W e have specially focused on the way these attacks can arise at each level of the network. Moreover, we observed that most of the exi sting Systems such as Content Addressable Network (CAN), Chord, Pastry, Tapestry, Kademlia, and Viceroy suffer from threats and vulnerability which lead to disrupt and corrupt their functioning . We hope that our survey constitutes a good help for who's working on this area of research. Keywords—P2P, Structured P2P Overlay Networks, DHT, Security, classification I. INTRODUCTION 2P networks Systems have generated substantial inte rest in the last few years because the emergent of global s cale phenomena. As more and more users own powerful processors, large storage spaces and fast network c onnections, P2P networks represent an attractive way to mobiliz e these resources. They were designed to provide many services such as creating large scale data sharing, distributed c omputing, instant messages communication, collaborative appli cations, multi players games, and ad-hoc network. These popular services make P2P networks an attractive target for attackers. Knowing how Systems have failed can help us build Systems that resist failure (1). This paper collects and or ganizes a number of current security attacks that have caused failure in structured P2P overlay networks, so Computer System Designer, programmers, administrators, and users ma y do their work with a precise knowledge of what has gone before. Based on the overlay topology and the organization of the network connection different types of P2P networks have been defined as hierarchical P2P network, and flat P2P n etwork. In this paper, we will focus on hierarchical P2P netwo rk, more precisely on structured P2P overlay networks. Security attacks of structured P2P overlay network are any condition or circumstance that can threaten the bes t functioning of the System. To evaluate these attacks, an analyst must do a dee ply research, understand the System fluently, and recog nize that attacks may exist anywhere in the System.
Zied Trifa - One of the best experts on this subject based on the ideXlab platform.
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Taxonomy of Structured P2P Overlay Networks Security Attacks
World Academy of Science Engineering and Technology International Journal of Computer Electrical Automation Control and Information Engineering, 2012Co-Authors: Zied Trifa, Maher KhemakhemAbstract:The survey and classification of the different secu rity attacks in structured peer-to-peer (P2P) overlay ne tworks can be useful to Computer System Designers, programmers, administrators, and users. In this paper, we attempt to provide a t axonomy of structured P2P overlay networks security attacks. W e have specially focused on the way these attacks can arise at each level of the network. Moreover, we observed that most of the exi sting Systems such as Content Addressable Network (CAN), Chord, Pastry, Tapestry, Kademlia, and Viceroy suffer from threats and vulnerability which lead to disrupt and corrupt their functioning . We hope that our survey constitutes a good help for who's working on this area of research. Keywords—P2P, Structured P2P Overlay Networks, DHT, Security, classification I. INTRODUCTION 2P networks Systems have generated substantial inte rest in the last few years because the emergent of global s cale phenomena. As more and more users own powerful processors, large storage spaces and fast network c onnections, P2P networks represent an attractive way to mobiliz e these resources. They were designed to provide many services such as creating large scale data sharing, distributed c omputing, instant messages communication, collaborative appli cations, multi players games, and ad-hoc network. These popular services make P2P networks an attractive target for attackers. Knowing how Systems have failed can help us build Systems that resist failure (1). This paper collects and or ganizes a number of current security attacks that have caused failure in structured P2P overlay networks, so Computer System Designer, programmers, administrators, and users ma y do their work with a precise knowledge of what has gone before. Based on the overlay topology and the organization of the network connection different types of P2P networks have been defined as hierarchical P2P network, and flat P2P n etwork. In this paper, we will focus on hierarchical P2P netwo rk, more precisely on structured P2P overlay networks. Security attacks of structured P2P overlay network are any condition or circumstance that can threaten the bes t functioning of the System. To evaluate these attacks, an analyst must do a dee ply research, understand the System fluently, and recog nize that attacks may exist anywhere in the System.