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Laftah W.A.,University Technologi | Hashim S.,University Technologi | Ibrahim A.N.,University Technologi
Polymer - Plastics Technology and Engineering | Year: 2011

This review encompasses definitions, classification, main properties, and application of polymer hydrogels. Raw materials and preparation techniques of polymer hydrogels were described. The factors that affect absorption capacity and swelling properties of polymer hydrogels were reviewed. PHG materials are defined as a viscoelastic network structure, swellable and not soluble in water with high absorbent capacity, which may reach 1000 g/g of their dried weight to be termed "superabsorbent polymer hydrogels". PHGs have the ability to release absorbed fluids under certain circumstances. © Taylor & Francis Group, LLC.

Rastegari H.,University Technologi | Shamsuddin S.M.,University Technologi
International Journal of Advances in Soft Computing and its Applications | Year: 2010

Different users have different needs when they submit a query to a web search engine. Common search engines investigate the World Wide Web (WWW) and find many pages according to user query regardless the query submission. The aim of web search personalization is to tailor search results for that particular user. One issue in this field is to gather user information without user intervention. Hence, this paper presents the insight of Artificial Immune Systems (AIS) for user profile construction and probing highly relevant pages in search results. From our investigations, we found conclude that AIS is a suitable personalization tool to knowledge discovery due to its adaptability and learning capability that are required to solve web search personalization. © ICSRS Publication, 2010.

Muminov M.E.,Samarkand State University | Muminov M.E.,University Technologi | Khurramov A.M.,Samarkand State University
Theoretical and Mathematical Physics(Russian Federation) | Year: 2014

We consider a system of two arbitrary quantum particles on a three-dimensional lattice with special dispersion functions (describing site-to-site particle transport), where the particles interact by a chosen attraction potential. We study how the number of eigenvalues of the family of the operators h(k) depends on the particle interaction energy and the total quasimomentum (formula presented) is a three-dimensional torus). Depending on the particle interaction energy, we obtain conditions under which the left edge of the continuous spectrum is simultaneously a multiple virtual level and an eigenvalue of the operator h(0). © 2014, Pleiades Publishing, Ltd.

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