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Nomenclatura Unesco > (22) Física > (2203) Electrónica

Mostrando recursos 121 - 140 de 75,750

121. Metabroker: A Generic Broker for Electronic Commerce - Steve Caughey; David Ingham; Paul Watson
From a commercial perspective, the Web has promised much more than it has delivered and the dream of worldwide Internet business enterprises has yet to become a reality. Electronic commerce currently resembles a vast, sprawling bazaar in which visitors must wander through countless market stalls. For most potential customers, this is frustrating and time-consuming. In traditional commerce, middlemen, or brokers, make it easier for customers to find, compare and buy because they aggregate goods and services from a variety of sources and display them in a way which is helpful to customers. In the electronic marketplace of the near future,...

122. Auditable, Anonymous Electronic Cash (Extended Abstract) - Tomas S
Abstract. Most anonymous, electronic cash systems are signaturebased. A side effect of this is that in these systems the bank has the technical ability to issue unreported, valid money. It has been noticed in the past that this may lead to a disaster if the secret key of the bank is compromised. Furthermore, the above feature prevents any effective monitoring of the system. In this paper we build a fully anonymous, auditable system, by constructing an electronic cash system that is signature-free, and where the bank needs to have no secret at all. The security of the system relies instead...

123. Auditable, Anonymous Electronic Cash (Extended Abstract) - Tomas S
Abstract. Most anonymous, electronic cash systems are signaturebased. A side effect of this is that in these systems the bank has the technical ability to issue unreported, valid money. It has been noticed in the past that this may lead to a disaster if the secret key of the bank is compromised. Furthermore, the above feature prevents any effective monitoring of the system. In this paper we build a fully anonymous, auditable system, by constructing an electronic cash system that is signature-free, and where the bank needs to have no secret at all. The security of the system relies instead...

124. Metabroker: A Generic Broker for Electronic Commerce - Steve Caughey; David Ingham; Paul Watson
From a commercial perspective, the Web has promised much more than it has delivered and the dream of worldwide Internet business enterprises has yet to become a reality. Electronic commerce currently resembles a vast, sprawling bazaar in which visitors must wander through countless market stalls. For most potential customers, this is frustrating and time-consuming. In traditional commerce, middlemen, or brokers, make it easier for customers to find, compare and buy because they aggregate goods and services from a variety of sources and display them in a way which is helpful to customers. In the electronic marketplace of the near future,...

125. Electronic Contracting with COSMOS - How to Establish, Negotiate and Execute Electronic Contracts on the Internet - Frank Griffel; Marko Boger; Harald Weinreich; W. Lamersdorf; Winfried Lamersdorf; Michael Merz; Ponton Hamburg
Today, the Internet gains more and more attraction even for small companies to contact business partners and to automate cooperation between each other. However, the smaller the company the higher the relative setup costs that are required if the complete process of a commercial transaction is to be supported. We propose COSMOS as an Internet-based electronic contracting service that facilitates commercial partners with offer catalogues, a brokerage service, contract negotiation and signing as well as contract execution. The COSMOS architecture supports these functions in an integrated, unified way. The design and execution of contracts integrates patterns from the CORBA Joint...

126. Plantilla electrónica y bases de datos -
En este pliego usted conocerá los misterios de las plantillas electrónicas, y descubrirá que son un medio eficiente de guardar sus informaciones, efectuar cálculos rápidos y precisos, ayudando en la organización de su vida financiera, personal y profesional. Descubrirá también que los bancos de datos son una poderosa herramienta para organizar sus informaciones en forma de tablas o registros, proporcionando medios simples y directos de hacer búsquedas, ordenaciones, cruces de datos y otros recursos.

127. El uso cotidiano de los libros electrónicos - Pérez Arranz, Fernando
La aparición de los Libros Electrónicos va a suponer un cambio más importante que la aparente introducción de un nuevo formato como soporte en la transmisión de conocimientos. Este radical cambio tiende a modificar comportamientos y hábitos sociales en el tan humano acto de leer y acceder a la cultura. El concepto de libro tradicional no había cambiado desde el codex medieval, así como la manera en que interactuamos con él. Las bibliotecas, como principales intermediarias entre la cultura y la sociedad, cambiarán algunos de sus servicios en la adopción de este formato electrónico. | The appearance of electronic books will bring about a change,...

128. El uso cotidiano de los libros electrónicos - Pérez Arranz, Fernando
La aparición de los Libros Electrónicos va a suponer un cambio más importante que la aparente introducción de un nuevo formato como soporte en la transmisión de conocimientos. Este radical cambio tiende a modificar comportamientos y hábitos sociales en el tan humano acto de leer y acceder a la cultura. El concepto de libro tradicional no había cambiado desde el codex medieval, así como la manera en que interactuamos con él. Las bibliotecas, como principales intermediarias entre la cultura y la sociedad, cambiarán algunos de sus servicios en la adopción de este formato electrónico. | The appearance of electronic books will bring about a change,...

129. ebXML: Electronic Business XML
Electronic commerce is not a new concept. For over 25 years Electronic Data Interchange (EDI) has given companies the prospect of eliminating paper documents, reducing costs, and improving efficiency by exchanging business information in electronic form. Ideally, companies of all sizes could conduct eBusiness in a completely ad hoc fashion, without prior agreement of any kind. But this vision has not been realized with EDI. Only large companies are able to afford to implement it, and much EDI-enabled eBusiness is centered around a dominant enterprise that imposes proprietary integration approaches on its Trading Partners. By leveraging the efforts of technical...

130. SCC219/SCI313: Electronic Document Design
in print . they can be effectively `unlimited' (unbounded) in size, by using hyperlinks to connect to other documents . they can provide various forms of user `interaction' Each of these characteristics has implications for the content, appearance and organisation of such documents implications that will form much of the theoretical focus of the unit. Aims After completing this unit students will be able to design, create and manage documents for distribution over electronic systems. Specifically, students will be able to 1. define the major forms of electronic information distribution systems 2. describe the common media used in electronic documents and their characteristics 3. identify relevant design principles for effective documents 4....

131. Bryant & Colledge: Trust in Electronic Commerce Business Relationships TRUST IN ELECTRONIC COMMERCE BUSINESS RELATIONSHIPS - Antony Bryant; Barbara Colledge
The concept of trust in electronic commerce literature has emerged over recent years. Whilst trust has always been an aspect of business generally, in the digital economy it has taken on a more pivotal and visible role. When trading with someone, with whom you have no physical or visible contact it is imperative that the two parties have some basis for having confidence in the transaction. It is the governance of these commercial relationships in electronic commerce that will be explored in this paper. In particular, the basis of trust relationships will be considered and theoretical models of transactional structures...

132. A Language-Action Approach to Electronic Negotiations - Mareike Schoop
The current state-of-the-art in electronic negotiations shows a focus on the trade of standardised mostly inexpensive products in fixed networks of suppliers and customers. To overcome these shortcomings, the goal must be to enable the trade of complex and valuable goods and to support many-to-many marketplace for that purpose. Once valuable goods are concerned, the trade process involves negotiations which consist of a number of communicative exchanges. The Language-Action Perspective has proved to be relevant for the analysis and modelling of communication acts. We will show that a LAP approach is indeed useful as the basis for complex negotiations but...

133. Mobile Electronic Commerce through the Web - Harri Oinas-kukkonen
The purpose of this paper is two-fold. Firstly, it discusses a research experiment with a mobile Web information system. Empirical findings suggest that usefulness and fluent navigation predict a positive use experience in these. Secondly, the paper introduces general design principles for developing such systems for mobile electronic commerce. These design principles suggest that (1) Web information systems should be designed as mobile aware, (2) they should be designed as hypertext information systems, and (3) the development should be carried out through developing rich Web information systems. Techniques, such as trimmed links, rich links, maps and guided tours, and adaptive...

134. Bare-handed electronic voting with pre-processing - Ben Riva; Amnon Ta-shma
Many electronic voting schemes assume the user votes with some computing device. This raises the question whether a voter can trust the device he is using. Three years ago, Chaum, and independently Neff, proposed what we call barehanded electronic voting, where voters do not need any computational power. Their scheme has a very strong unforgeability guarantee. The price for that, however, is that they require the voter to tell his vote to the voting booth. In this paper we propose a scheme where the voter votes bare-handedly, and still maintains his privacy even with respect to the voting booth. We...

135. Bare-handed electronic voting with pre-processing - Ben Riva; Amnon Ta-shma
Many electronic voting schemes assume the user votes with some computing device. This raises the question whether a voter can trust the device he is using. Three years ago, Chaum, and independently Neff, proposed what we call bare-handed electronic voting, where voters do not need any computational power. Their scheme has a very strong unforgeability guarantee. The price for that, however, is that they require the voter to tell his vote to the voting booth. In this paper we propose a scheme where the voter votes bare-handedly, and still maintains his privacy even with respect to the voting booth. We...

136. Distributed models for brokerage on electronic commerce - Isabel Gallego; Jaime Delgado; José J. Acebrón
Abstract. With the development of Electronic Commerce (EC), the need of offering brokerage facilities in a distributed environment has arisen. Customers need, in many situations, systems (broker agents) that simplify them the access to the different products and services provided by suppliers. On the other hand, the existence of brokers increases the globality of EC, since customers are even more unaware of the location of their final goods providers. To help on this, several brokerage systems are being developed in different contexts. However, how to organise broker agents in a distributed EC environment is not always being approached in the...

137. Bare-handed electronic voting with pre-processing - Ben Riva; Amnon Ta-shma
Many electronic voting systems assume the user votes with some computing device. This raises the question whether a voter can trust the device he is using. Two years ago, Chaum, and independently Neff, proposed what we call bare-handed electronic voting, where voters do not need any computational power. Their scheme has a very strong unforgeability guarantee. The price for that, however, is that they require the voter to tell his vote to the voting booth. It seems that every scheme that does not require any computational power from the voter has this drawback. We modify this model. We allow the...

138. Bare-handed electronic voting with pre-processing - Ben Riva; Amnon Ta-shma
Many electronic voting schemes assume the user votes with some computing device. This raises the question whether a voter can trust the device he is using. Three years ago, Chaum, and independently Neff, proposed what we call bare-handed electronic voting, where voters do not need any computational power. Their scheme has a very strong unforgeability guarantee. The price for that, however, is that they require the voter to tell his vote to the voting booth. In this paper we propose a scheme where the voter votes bare-handedly, and still maintains his privacy even with respect to the voting booth. We...

139. Protocols for Secure, Atomic Transaction Execution in Electronic Commerce - Srividhya Subramanian; Mukesh Singhal
Computer networks are an efficient, inexpensive, convenient and fast mode of communication and information transfer. There is widespread demand for the ability to buy and sell goods, especially electronic, using this medium. Sales over computer networks is also referred to as electronic commerce. A protocol for electronic commerce transactions is the series of steps that two parties must follow in order to transact business successfully. There are various issues that arise while designing electronic commerce protocols: how can one party be prevented from disappearing with the money/goods in the middle of a transaction? How can a party establish its identity...

140. Electronic Commerce in Scientific, Technical and Medical Publishing - An Industry Analysis; Ada Scupola
Electronic commerce is becoming one of the drivers of competition and is starting playing a role in industry structural change and in affecting the competitive advantage of companies. In this article it is showed how electronic commerce might affect the scientific, technical and medical (STM) publishing sector. More specifically the paper looks at the emergence of the electronic journal as a substitute for the paper journal and tries to provide some empirical evidence of the effects of disintermediation and electronic intermediation in the value chain of the STM industry. It is further argued that some actors of the STM industry...

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