| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 72-76 |
| Abstraksi Narasi | : | The growth of global Internet is causing a dramatic change in bot the kind of people whoacces information and the types of information itself, ranging from unstructured multimedia data to traditional record-oriented data. To cope with these new needs, the interaction techniques traditionally offered to DBMS users have to envolve and eventually integrate in a powerful interface to the global information infrastructure. In particular, from the user`s point of view there is the need for both effective visualization of multimedia information and retrieval tools able to overcome the existing dichotomy between browsing and querying. This article concentrates on the mutual relationship between database querying and Internet navigation by reviewing some important contributions from different areas, such as information retrieval, database research, and visualization techniques. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 78-83 |
| Abstraksi Narasi | : | National information infrastructure (NII) public policy issues apply issues to development of the global information infrastructure (GII) as well. Individuala privacy rights; prevention of malicious behavior by irresponsible individuals; protecting the interest of computer system owners, operators, users, and the general public from computer crime; excluding unauthorized acces; and preventing destruction of national computer systems (e.g., interbank transaction systems) are issues that can be endemic to GII operations. More recent issues, such as the need for high-definition television standards, expand the global challenges. Hence, the body of work performed by CCIP for IEEE-USA, which focused on public policy issues of the NII, can serve as a set of lesson learned that should be considered by the GII community. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 146-153 |
| Abstraksi Narasi | : | This article investigates resource allocation in ATM networks and emphasizes bandwidth allocation. Resource allocation methods are categorized, and static and dynamic allocation strategies are compared. Dynamic allocation uses actual traffic behavior, while static allocation uses only the reference traffic condition given a priori. Examples of dynamic allocation strategies are available bit rate flow control, dynamic connection admission control, and dynamic VP bandwidht control. Dynamic resource allocation is shown to be promosing for situations where the a priori reference model is unclear. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 138-145 |
| Abstraksi Narasi | : | When designing and configuring an ATM-based B-ISDN, it remains difficult to guarantee the quality of service (QoS) for different service classes, while still allowing enough statistical sharing of bandwidth so that the network is efficiently utilized. These two goals are often conflicting. Guaranteeing QoS requires traffic isolation, as well as allocation of enough network resources (e.g., buffer space and bandwidth) to each call. However, statistical bandwidth sharing means the network resources should be occupied on demand, leading to less traffic isolation and minimal resource allocation. The authors address this problem by proposing and evaluating a network-wide bandwidth management framework in which an appropriate compromise between the two conflicting goals is achieved. Specifically, the bandwidth management framework consists of a network model and a network-wide bandwidth allocation and sharing strategy. Implementation issues related to the framework are discussed. For real-time applications the authors obtain maximum queuing delay and queue length, which are important in buffer design and VP (virtual path) routing. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 58-62 |
| Abstraksi Narasi | : | In this article the authors identify reliability, privacy, and security as critical issues in electronic commerce. In other work, designers of information systems have identified issues as critical, such as the ability to provide offline verification. It is widely agreed that an electronic currency system must provide divisibility, scability in number of user, conversation of money or tamper resistance, exchangeability or interoperability, and availability [1-6]. However, by returning to the fundamental definition of money and the essential nature of electronic information systems, the authors that privacy, reliability, and security are also critical issues. It is argued that these issues are particularly important in Internet commerce. The authors conclude by noting how some proposed Internet commerce systems provide, or fail to provide, security, reliability, and privacy. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 122-129 |
| Abstraksi Narasi | : | The authors discuss the broad issues of bandwith allocation and call admission control (CAC) in high-speed networks, focusing on asynchronous transfer mode technology. It is maintained that despite the considerable amount of high-quality work carried out in this area, the debate surrounding these issues is not yet resolved. The complexity of dealing with a wide variety of as yet unknown user traffic types, as well as the evolving architecture of networks, means that currently proposed solutions are only an intermediate step of the design process. The authors discuss the nature of user traffic and illustrate how it can impact the debate on quality of service, concetrating on some `equivalent bandwith` type CAC strategies. Also discussed is a recently introduced method which uses diffusion approximations. Finally, the authors discuss the novel issue of evaluating the overload created by the CAC procedure itself on network nodes. The presentation is complemented by several numerical and simulation results which illustrate the discussion. |
| Nama Pengarang | : | Raffaele Bolla, Franco Davoli, Mario Marchese, Erol Gelenbe, Xiaowen Mang, Raif Onvurall, L. Jean Camp, Marvin Sirbu, Kunyan Liu et al, Hiroshi Saito, Stan Trost, Henry Wolf, Tiziana Catarci, Glenn Kowack, Charles E. Perkins, Christos Douligeris, George Develekos, Paul P. White, Davide Musella, Marco Padula, Keiichi Koyanagi et al, Gary C. Kessler, Steven D. Shepard, Near M. Margalit, Sheng Z. Zhang, John E. Bowers |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 130-137 |
| Abstraksi Narasi | : | The statistical multiplexing operation within an ATM network node is considered, with respect to different methods for the allocation of the banwidth of an outgoing link. Service separation is assumed by dividing the overall traffic flows into classes, homogeneous in terms of performance requirements and statistical characteristics, which share the bandwidth of a link according to some specified policy. This context allows one to clearly define, by means of several existing approaches, a region in the space of connections of the different classes (call space) where quality of service (QoS) requirements at the cell level are satisfied. Within this region, some criteria for allocating the bandwidth of the link to the service classes are proposed, and the resulting allocation and call admission control (CAC) strategies are defined and analyzed. The goal of these operations is to achieve some desired QoS at the call level. Several numerical simulation results are presented, in order to highlight the different performance characteristic of the various methods. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 104-115 |
| Abstraksi Narasi | : | Subband and wavelet transforms have been a subject of great interest, especially in the field of signal processing and applied mathematics. This article presents a tutorial on this subject, emphasizing the fundamentals and the reason for its success, importance, and potential. Subband and wavelet transform applications in communications are also reviewed. These application areas include interference excision, spread spectrum codes based on subband transform bases, CDMA, and discrete multitone transceivers. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 134-140 |
| Abstraksi Narasi | : | The Pan American Cable System, when completed in September 1998, will provide high capacity international telecommunication services between South America and the rest of the world. Pan American will be a cost effective 7300 km trunk and branch undersea cable system with landings in Chile, Peu, Ecuador, Panama, Colombia, Venezuela, Aruba, and the United States. It will be configured into four logical rings that will automatically protect traffic in the rest of the network should a fault occur in any branch. Initially planned to operate at 2.5 Gb/s on a single wavelength, the rings can be stacked using wavelength division multiplexing to increase capacity as demand for international services to the region grows. A highly sophisticated Network Management System will operate, administer, and maintain the entire network from a centralized, secure location. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | IEEE Communications Magazine |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 36-43 |
| Abstraksi Narasi | : | This article describes recent activites in the area of RF integrated circuits. First, transceiver architectures developed for cellular and cordless telephone standards are presented. Next, the choice of device technology is discussed, and the design of building blocks such as low-noise amplifiers and mixers, oscillators, and power amplifiers is described. Last, some of the emerging applications of RF circuits and their implications for the design are considered. |
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