International Journal of Computer and Applications

The Semantic Web 10

2009 International Conference on Future Computer and Communication

being used in many other applications to explicitly declare the knowledge embedded in them. However, not only are ontologies useful for applications in which knowledge plays a key role, but they can also trigger a major change in current Web contents. This change is leading to the third generation of the Web—known as the Semantic Web—which has been defined as “the conceptual structuring of the Web in an explicit machine-readable way.”1 This definition does not differ too much from the one used for defining an ontology: “An ontology is an explicit, machinereadable specification of a shared conceptualization.”2 In fact, new ontology-based applications and knowledge architectures are developing for this new Web. A common claim for all of these approaches is the need for languages to represent the semantic information that this Web requires—solving the heterogeneous data exchange in this heterogeneous environment. Here, we don’t decide which language is best of the Semantic Web. Rather, our goal is to help developers find the most suitable language for their representation needs.

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Ontology languages for the Semantic Web

A massive release of harmful substances especially heavy metal ions and dyes to the environment has been a major concern due to many people disregards the proper protocols in the waste management. The freshwater supplies are threatened and huge discharge of pollutants result from various anthropogenic activities may pose a major threat to the living organisms and negatively affect the ecosystem stability. This article reviews the development of magnetic iron oxide nanocomposites for removal of heavy metal ions and dyes from water. The highlight will be focused on current research activities for controlled size and dispersion of magnetic iron oxide nanoparticles within solid matrices including zeolites, silica, clays, carbon, activated carbon, graphene and graphene oxide. The magnetic properties of the nanocomposites will be evaluated to determine whether they possessed sufficient magnetization for easy separation by an external magnet. The unique features of the synthesized materials will be investigated along with their application in the removal of heavy metal ions and dyes. The advantages and limitations of the magnetic nanocomposites will be highlighted to determine their adsorption ability. The effect of various parameters such as pH, contaminants concentration, adsorbent dosage, contact time and temperature will be summarized to identify the best condition for effective pollutants removal.

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Solid matrices for fabrication of magnetic iron oxide nanocomposites: Synthesis, properties, and application for the adsorption of heavy metal ions and dyes

Wireless Mesh Networks (WMNs) is a promising technology for backhaul wireless connectivity in user premises due to its multi-hop nature, multi-radio multi-channel capabilities and stable power supplies. With proliferation of new and advanced access technologies, future WMN’s will bean integrated paradigm to provide seamless and ubiquitous connectivity to multi interface end user devices. Co-existence of multiple heterogeneous interfaces on wireless mesh routers increases overall network capacity, resilience and availability in the mesh backhaul as compared to homogenous radios mesh networks. In this paper, we present a novel architecture for heterogeneous WMN’s based on integrated IEEE 802.11/16/15technologies and discuss issues, possible solutions and future insight. We propose an optimal route algorithm along with radio assignment graph which captures the heterogeneity of radios. We also present a handover mechanism for seamless interface switch for mobile and static end user devices.

Optimal Path Discovery with Mobility Management in Heterogeneous Mesh Networks

Due to the advancement in technology, routers of Wireless Mesh Networks can be equipped with multiple interfaces to achieve parallel communication sessions among nodes. Assigning distinct non-overlapping channels to each set of communicating radios increases network connectivity and throughput. On the other hand, the performance of wireless networks is always limited by the interference phenomena among the concurrent transmission sessions. Combined with interference constraint topology due to limited available orthogonal channels, selfishness of end users further degrades individual fairness and affects overall network performance due to their protocol deviation in a non-cooperative environment. In this paper, we have proposed a non- cooperative game theoretical model in a multi-radio multi- channel Wireless Mesh Network based on the end users flows in an interference constrained topology. Necessary conditions for the existence of Nash Equilibrium have been derived. Our simulation results show that our distributed algorithm converges to a stable state in finite time where each node gets fair end to end throughput across multiple-collision domains at the end of the game. Further, the Price of Anarchy of the system was measured for several runs which is always near to one; showing the strength and stability of our proposed scheme.

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Selfish Flow Games in Non-Cooperative Multi-Radio Multi-Channel Wireless Mesh Networks With Interference Constraint Topology

The integration of mobile wireless devices into grids has recently drawn the attention of research community as this integration has resulted in new challenges. Mobile grid enables the mobility of a requesting user to share unused available resources on a network required in different applications in science, health and education. These handheld devices are not capable to cope with the existing demands of networks and applications. Heterogeneous interfaces, computational power, storage and display differences among these devices demands more research. In this paper we present analysis of different routing protocol’s behavior in a mobile ad-hoc grid environment, where best routing is the requirement of a grid application. These analyses were made based on a test scenario of e-health application in a mobile ad-hoc grid environment.

Performance Analysis of Proactive and Reactive Routing Protocols for Mobile Ad-hoc Grid in e-health Applications

Developing countries are realizing the importance of e-government to provide the best possible public services to the citizens and businesses. However, several problems have been faced by the organizations in implementation of the electronic government. In this paper, we analyzed Pakistan’s e-government based on the United Nation (UN) e-government survey reports (2003 - 2012). We also conducted SWOT (Strengths, Weaknesses, Opportunities and Threats) and PEST (Political, Economical, Sociological and Technological) analysis to identify different factors which have positive and negative effects on Pakistan’s e-government.

/pdf/e-government-in-pakistan-swot-and-pest-analysis-1angsasicf.pdf

E-government in pakistan: swot and pest analysis

The growing number of ontologies on the web has emerged new research issues in the field of semantic web. It is now common to have more than one ontologies on the web for a specific domain. These ontologies may have various types of heterogeneities and therefore it is a challenging task for information retrieval systems to utilize the knowledge of all available ontologies. A number of ontology alignment systems have proposed by researchers in the last decade to bridge this semantic gap. During an alignment process, the entities from different ontologies are compared to find the semantically similar entities. For this purpose, various similarity measures are discussed according to the type of ontological heterogeneities. This paper investigates most common types of heterogeneities exist in ontologies and matchers which can deal with such heterogeneities. Furthermore, the role of aggregation methods in alignment systems have also been analyzed and discussed.

Sadaqat Jan

Papers

Optimal Path Discovery with Mobility Management in Heterogeneous Mesh Networks

Selfish Flow Games in Non-Cooperative Multi-Radio Multi-Channel Wireless Mesh Networks With Interference Constraint Topology

Performance Analysis of Proactive and Reactive Routing Protocols for Mobile Ad-hoc Grid in e-health Applications

E-government in pakistan: swot and pest analysis

Similarity Measures and their Aggregation in Ontology