Статьи журнала - International Journal of Information Technology and Computer Science
Все статьи: 1195
Web Refinding Support System Based on Process Recollective Activity
Статья научная
The recent growth of search technology has enabled people to find information more easily. However, most people need to refind information on a daily basis. Finding and refinding are different activities and require different types of support. However, current refinding support systems don't consider this point. This has caused several problems: PVR, loss of contextual information, and difference in search experiences. We discuss these problems and their solutions from a cognitive perspective. We propose a process-recollective refinding support system based on this discussion. We demonstrate a novel approach to refinding information on the web and a specific system as an example.
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Web Service Component Reusability Evaluation: A Fuzzy Multi-Criteria Approach
Статья научная
The service oriented architecture supports reusable components. Component reusability is one of the important features while designing web services for reuse. The reusability is an ideal and key factor to improve the quality and production rate of software. It becomes very helpful for quality assurance, if such quality parameters can be quantified. Non functional quality parameters like reusability are not easy to measure and quantify. This paper attempts to quantify reusability using fuzzy multi criteria approach. This approach is considered due to the unpredictable nature of reusability attributes. For the estimation of reusability, the paper identifies 5 key attributes of reusability i.e. Coupling, Interface Complexity, Security, Response Time and Statelessness in context of web service components.
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Web Services Matchmaking Based on a Partial Ontology Alignment
Статья научная
The fast development and the huge number of existing web services have raised the problem of the urgent need for matchmaking mechanisms. However state-of-the-art matchmakers are unsuitable for locating web services that use different ontologies. This aspect is important since it is not realistic to assume that Web services will always be defined by the same ontology, as the Web service requester and provider operate independently, each defines their own ontologies to describe their services. This is an emergent research issue that has not been well addressed. This work is a contribution to achieve semantic interoperability in a multi-ontology environment. This paper describes a Web service multi-ontology matchmaker for SAWSDL services, called SAWSDL-MOM which locates web services that use different ontologies. The matchmaker engine incorporates a novel partial ontology alignment algorithm with syntax, linguistic and original structural matchers. In determining the 1:1 mappings the Hungarian algorithm is used. Finally a matchmaking strategy is utilized in finding the score of each service. Experimental evaluation and comparison provide strong evidence that SAWSDL-MOM can significantly improve results, achieve better interoperability and scalability.
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Web Video Mining: Metadata Predictive Analysis using Classification Techniques
Статья научная
Now a days, the Data Engineering becoming emerging trend to discover knowledge from web audio-visual data such as- YouTube videos, Yahoo Screen, Face Book videos etc. Different categories of web video are being shared on such social websites and are being used by the billions of users all over the world. The uploaded web videos will have different kind of metadata as attribute information of the video data. The metadata attributes defines the contents and features/characteristics of the web videos conceptually. Hence, accomplishing web video mining by extracting features of web videos in terms of metadata is a challenging task. In this work, effective attempts are made to classify and predict the metadata features of web videos such as length of the web videos, number of comments of the web videos, ratings information and view counts of the web videos using data mining algorithms such as Decision tree J48 and navie Bayesian algorithms as a part of web video mining. The results of Decision tree J48 and navie Bayesian classification models are analyzed and compared as a step in the process of knowledge discovery from web videos.
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Web Vulnerability Finder (WVF): Automated Black- Box Web Vulnerability Scanner
Статья научная
Today the internet has become primary source of communication among people because it holds limitless space and pool of various web applications and resources. The internet allows us to communicate in a fraction of second with another people who is sitting in the other part of the world. At present, the internet has become part of our daily life and its usage is increasing exponentially, therefore it accumulates a number of web applications on daily basis on Web podium. Most of the web applications exist with few weaknesses and that weaknesses give room to several bad buys (hackers) to interrupt that weak part of code in web applications. Recently, SQL Injection, Cross Site Scripting (XSS) and Cross Site Request Forgery (CSRF) seriously threaten the most of the web applications. In this study, we have proposed a black box testing method to detect different web vulnerabilities such as SQL Injection, XSS and CSRF and developed a detection tool i.e. Web Vulnerabilities Finder (WVF) for most of these vulnerabilities. Our proposed method can automatically analyze websites with the aim of finding web vulnerabilities. By applying the tool to some websites, we have found 45 exploitable XSS, SQL Injection 45, Directory Discloser 38 and Local/remote file inclusion 40 vulnerabilities. The experimental results show that our tool can efficiently detect XSS, SQL Injection, Directory Discloser and LFI/RFI vulnerabilities.
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Web services for transforming e-cultural heritage management in Tanzania
Статья научная
Globally, applications of Information and Communication Technologies (ICTs) in services management and delivery have positively transformed various sectors of economies. Similar transformations have been witnessed in Tanzania, where mobile money and the Internet have transformed the way businesses are done. However, the transformations have not taken place across all sectors of the Tanzanian economy with some sectors lagging further behind than others. Cultural heritage sector, in particular, has been slow in leveraging ICT to transform the delivery of services. The sector is characterized by poor consumption of heritage sites and artworks, neglect, low publicity, weak branding, to mention a few. Although the achieved level of skills in Internet and Web have enabled the proliferation of many useful Websites which offer services to the public, information gathering remains a huge challenge considering the size of the country, its cultural heritage from 126 tribes and the vast nature reserves. We have investigated the usefulness of Web services in promoting mechanisms to gather and disseminate information about e-Cultural Heritage in Tanzania. In our investigation, we analyzed stakeholders of the sector and realized that Web services can be used to foster mechanisms within specific groups using crowdsourcing techniques. We then proposed specific Web services that cater for information flow chain of Tanzanian's artwork industry and developed an e-cultural heritage portal for demonstration. We tested the system with a sample of selected stakeholders and the initial results indicated that the locals’ readiness for such a system is strong enough and that apart from developers benefiting from the Web services, accessibility of information and stakeholders’ visibility will improve.
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Website Structure Optimization Model Based on Ant Colony System and Local Search
Статья научная
The unabated growth of the World Wide Web in the last decade and the increasing size of the websites have resulted in significant amount of research activity to improve the link structure of the websites. A website can be considered as a directed graph with webpages as nodes and hyperlinks as edges referred to as the Webgraph. Website structure optimization or reorganization is also considered as a graph optimization problem. The researchers have developed few models to optimize the website link structure. It is observed that the heuristic and mathematical models cannot optimize webgraphs of large size and are also time consuming. This paper presents an Ant Colony and local search based hybrid metaheuristic model for the newly emerged website structure optimization (WSO) problem. The developed hybrid model is also compared with Ant colony method and it is observed that the model performs better than Ant Colony System based approach.
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Weighted Priority Queuing: A New Scheduling Strategy for Web Services
Статья научная
Web services are considered as one of the best and most widespread solution for handling the interoperability problem and the challenge of integration. The proliferation of Web services over the Internet becomes more and more significant. They are henceforth playing an important role in several fields such as e-health, e-commerce and e-learning. Thus, one important question arises: how to manage Web services more efficiently? It is a key problem to the Web services based- applications at present especially that the need to enhance the Quality of Services (QoS) is constantly growing: the better the QoS are, the more the users are satisfied. This has spurred the study of scheduling algorithms for providing QoS guarantees. In this paper we put the light on the Web services requests scheduling strategies on the server side. In fact, we present a brief overview and a comparative evaluation of three queuing scheduling disciplines for Web services, which are: First in First out (FIFO), Priority Queuing (PQ) and Weighted Fair Queuing (WFQ). Then, we put forward a new scheduling strategy based on two well-known strategies namely: Priority Queuing and Weighted Fair Queuing. The experimental results highlight the merits and shortcomings of each scheduling discipline in addition to its performance in terms of: execution time, communication time and response time.
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Why should municipalities use management information systems in their decision-making processes?
Статья научная
In recent years, rapid developing information and communication technology has been changing swiftly our insight of management perspective in our country and the World. Generally, dynamic and visionary private sector enterprises could easily adapt to these changes. From the point of information systems view, local governments just like the private sector which produce services. Local governments provide services to people living within the boundaries, but they never think or act as profit-oriented private sector. In new economy, cities are becoming more interconnected economically, culturally, and infrastructural through the parallel development of global telecommunication and transportation networks. Firstly, it has been investigated what factors affect the adoption of information technologies in Izmir Metropolitan Municipality. A survey was developed to measure the factors affecting the use of information technology in municipalities. The survey questions were prepared according to the effects of the above organizational factors. Also it was conducted with the managers of the branch manager level in Izmir Metropolitan Municipality. Finally, the results of the study were discussed and give a contribution to the literature.
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Статья научная
This paper examines the potential of existing web-based collaboration services in supporting the inter-organizational connectivity throughout the collaboration process. In doing so, the paper initially presents a brief overview and a hierarchical classification with respect to the degree and complexity of service integration of existing collaboration services which are applicable in inter-organizational settings. Successively, their shortcomings in supporting the process of inter-organizational collaboration are herein determined and discussed. As a conclusion, the paper elucidates the rational and need for designing the dedicated web-based collaboration platforms for facilitating the inter-organizational connectivity within a particular business sector.
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Статья научная
In this paper, a comparative study of Wideband MUSIC method, Joint Diagonalization Structure (JDS) method and Beam-Space Genetic Algorithm (BGA) is presented with respect to resolution probability and Root mean square error (RMSE) evaluated in both low and high Signal-to-Noise ratio (SNR) regions. The simulation results show that BGA has higher resolution probability than the JDS method and Wideband MUSIC method in low SNR region while in the high SNR region, Wideband MUSIC has higher resolution probability followed by BGA and JDS method. RMSE is smallest for BGA as compared to JDS and Wideband MUSIC in low SNR region. In the high SNR region, Wideband MUSIC has smallest RMSE followed by BGA and JDS method.
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Статья научная
Wireless sensor network (WSN) has emerged as potential technology for their applications in battlefields, infrastructure building, traffic surveillance, habitat monitoring, health, and smart homes. Unattended nature of these networks makes them vulnerable to variety of attacks, the inherent stringent resources makes conventional security measure infeasible. An attacker can capture a sensor node to install number of clone nodes with same privacy information causing serious security threats and deterioration in network lifetime. Current, security scheme along with distinct advantages suffer from number of limitations. A good counter attacks measure should not only cater for security and energy-efficiency but network lifetime as well. In this paper, we propose a next-node selection method which consider residual energy and clone attacks ratio in addition to distance, in order to overcome the limitation of fixed path based shortest routing. These factors are also considered while selecting the witness header in WSNs. Results demonstrate the efficacy of the proposed schemes in terms of network lifetime.
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eSMS - a Semantics-assisted Emergency Information System Based on Social Media
Статья научная
Natural and man-made disasters pose an ever-present threat to our society. Providing real time information is vital in emergency management. Current disaster information systems only use and manage relatively limited information, such as, within an organization or with a few organizations which have an agreement on information content and format. As a result, a large amount of potentially precious information and natural volunteer workers are ignored. On the other hand, social media have been used by people to propagate emergent situations. Therefore, in this project, we aim to maximally utilize all of the available emergency-related information from various sources of social media to better manage natural and man-made disasters. In particular, we propose a semantics-extended social search engine that can fetch highly relevant information from social media for emergency management purpose.
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gSemSim: Semantic Similarity Measure for Intra Gene Ontology Terms
Статья научная
Gene Ontology (GO) is an important bioinformatics scheme to unify the representation of gene and gene product attributes across all species. Measuring similarity or distance between GO terms is a key step for determining hidden relationship between genes. The notion of similarity between GO terms is a usual step in knowledge discovery related tasks. In literature various similarity measures between GO terms have been proposed. We have introduced a novel similarity measure scheme to improve three conventional similarity measures to reduce their limitations. The salient feature of the proposed GO Semantic Similarity (gSemSim) measure is its ability to show more realistic similarity between concepts in perspective of domain knowledge. A comparative result with other technique has also been presented that showing an improved contextual meaning of the proposed semantic similarity. This study is expected to assist the community of bio informaticians in the selection of better similarity measure required for correct annotations of genes in gene ontology.
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iText – SMS-based Web Services for Low-end Cell Phones
Статья научная
With the development of mobile wireless technology, more people are using their smart phones to browse Web sites, do social networking, and play online games. However, a significant fraction of people in developing regions are still using simple low-end devices with limited processing and communication capabilities. Access to Internet contents and services is currently available only for Internet-enabled, Internet-capable smart devices. To address this problem, in this paper, we propose a Short Messaging Service (SMS)-based service to enable low-end cell phones to access Internet and Web services. In particular, we designed a service called iTex, allowing users to use Google web services through text messages even if they do not own Internet-enabled and Internet-capable smart devices.
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