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Usability is a three-dimensional quality of software product, encompassing efficiency, effectiveness and satisfaction. Satisfaction always relies on subjective judgment, but on some degree, the measurement of efficiency and effectiveness is able to be objectively calculated by some approaches, which can help designers to compare different prototype design candidates in the early stage of product development...
Education in computer science disciplines, such as Linux, always focuses on both theoretical and implementation level of technology. However, the performance of traditional teaching approach is not satisfied in practice. This paper firstly gives two important issues in teaching which are ldquotask-drivenrdquo and rdquoobjective-orientedrdquo, then discusses how to integrate them into a new education...
A new kind of automotive electrical system is proposed, which named IEED system. It is a completely distributed system with only intelligent electrical & electronic device (IEED) in it. The systempsila features is described and key IEEDs in system are also presented. The system prototype was developed and experimented. Results showed that IEED system is feasible and cost effective.
SOA is a service-oriented software architecture model, and it can support the transformation of geographic information software from “system and function” to “service and application”. This paper first analyzes the connotation, model structure and main features of SOA, then proposes the basic frame and service process of geographical information service based on SOA, and finally takes the “Yellow...
As Oppliger stated, secure messaging refers to the ability to provide data confidentiality, data integrity, data origin authentication, and non-repudiation of origin services for email. It is very important but poorly developed and has very limited application. We propose an email protocol assures non-repudiability which means that if the email is successfully sent, the sender cannot deny she/he has...
Email has become a standard communication method nowadays. But when it comes to important correspondences containing sensitive governmental, commercial or medical information, certified delivery is required. We present in this paper a new certified email protocol which assures fair delivery, non-repudiability, confidentiality and timeliness. To achieve definite fairness, an offline TTP is employed...
Vector map is an important and valuable information resource, which is a kind of basic data for many information systems related to spatial location, such as GIS, ITS, etc. To protect copyright of vector map, this article presents a digital watermarking algorithm based on double-grid, which hides watermark information into the least significant bit of node coordinates separately. Experiments prove...
In virtual enterprise, the selection of enterprise with high efficiency to constitute a dynamic alliance is the essential issue for dynamic member selection of production function is one of methods for efficiency evaluating. Typically, labor and capital are two key input factors. However, in fact, key input factors may different from industry to industry in actual evaluation under specific circumstances...
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