Earticle

This paper proposes a secure sealed-bid auction schemes which adopt threshold cryptosystem without a third party. In the previous proposed sealed-bid auction schemes, an auctioneer is responsible for opening bids. However, malicious auctioneers can conspire with malicious bidders by revealing all bidding prices before the bid opening stage for bidding optimal bidding price to win the auction. To prevent against this, we decide to eliminate auctioneer from opening phase and involve plural clerks to choose secret keys, and then clerks distribute public keys to each other. On the bid opening phase, the clerks can cooperate with each other to open the bids without an auctioneer by using Pedersen’s protocol and Lagrange interpolating polynomial. Hence, an auctioneer is only responsible for verifying user’s identification and checking whether bids are valid or not. Furthermore, for enhancing security in our schemes, we utilize a hardware framework entitled “Untraceable Decryptor” to make all bids pass through it when the bids are transferred to clerks.

Recognition of Handwritten text has been one of the active and challenging areas of research in the field of image processing and pattern recognition. It has numerous applications which include, reading aid for blind, bank cheques and conversion of any hand written document into structural text form. In this paper we focus on recognition of English alphabet in a given scanned text document with the help of Neural Networks. Using Mat labNeural Network toolbox, we tried to recognize handwritten characters by projecting them on different sized grids. The first step is image acquisition which acquires the scanned image followed by noise filtering, smoothing and normalization of scanned image, rendering image suitable for segmentation where image is decomposed into sub images. Feature Extraction improves recognition rate and misclassification. We use character extraction and edge detection algorithm for training the neural network to classify and recognize the handwritten characters.

As for network security, post-IDS alert analysis has become a fashion in view of collaboration and correlation, and context-aware alert verification is one of the main solutions. In order to guarantee a unified representation of related information and knowledge, this paper tries to introduce basic-elements and the extension method into the study on context-aware alert verification. This paper then proposes the use of basic-elements to realize the formal presentation of alert information and context information in a unified manner, and applies the extension method based on basic-elements for context-aware alert verification by utilizing the extension set and the extension analysis. The evaluation result of validation scenarios shows that, the proposed approach prospects a formalized way to context-aware alert verification for network security with an appropriate use of the extension method based on basic-elements.

In this paper, the visualization method of 3-D data field in volumetric-swept display system based on the helix rotation screen and Digital Micro-mirror Devices (DMD) is discussed. It often determines the degree to which the display is capable of accepting the parallel transfer of data and its potential for achieving a high voxel activation capacity. The more complexity the model, the more computing time and more pixels numbers that the generation method of helix slice may obtain on 2-D contour lines images. The superfaces algorithm that is one of the kinds of methods for simplifying polyhedral meshes is used to ensure that the images have good display shape approximation, decrease as far as possible for faces number of the model. Thus it can greatly reduce the storage capacity and the calculation speed in the 3-D display system.

Computer Classrooms are always the major place where the education of information technology (IT) is executed in school. However, there exists a major problem that students were unable to practice after school with the same environment and there was no appropriate space to save their files for students, so it was not convenient for students’ learning attitude of computer. The service of private cloud computing was adopted in this paper to establish the education environment of IT for resolving these problems. The quasi-experimental method was applied to the study of 110 fifth grade students who were selected from Tunglo Elementary School in Miaoli County, Taiwan. The technology acceptance model was adopted as the theoretical basis of research framework in this paper. The experiment results showed that students’ acceptance for the environment of IT educational of cloud computing in elementary school was much better after the teaching. Besides, there was a positive correlation between user behavior and learning achievement for cloud computing service.

The popularity of Skype, bulletin boards, text messaging and Facebook among today’s youth paves the way for adapting learning management systems (LMS) allowing for the same experiences in the academic milieu. It also paved the way to the recognition of using a different blackboard being used to allow for anytime, anywhere learning to enhance and supplement traditional instruction. This is the Blackboard Learning Management System (BLMS). It is a learning platform which allows the web engineering students to access mini lectures, examinations, assignments, and classroom discussions and activities. This paper discuss the design and development of a web-enhanced project management course, a capstone course for graduating engineering students that integrates all the basic knowledge a student has learned in project management. The development and implementation of a web enhanced course in Project Management coupled with the use of classroom multimedia instruction, active and cooperative learning aimed to facilitate the teaching-learning process compared to the traditional whiteboard instruction.

The paper presents a method of test generation for Web applications based on model partition. Compared with the method of test tree for test generation, our approach ensures the effectiveness of test paths generated from the model of Web applications. In this paper, we first employ the Kripke structure to modeling the navigation behavior of a Web application. Then the theory for model partition is proposed to solve the problem of inefficiency test paths. Next a frame of test generation based on model partition is designed to support test generation and redundancy reduction of test paths. Finally, we take the student course system as an example to illustrate our approach.