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Nasimi P.,Islamic Azad University at Science and Research of Fars | Haidari M.,Islamic Azad University at Masjed Soleyman
International Journal of Green Nanotechnology | Year: 2013

Researchers today are able to encapsulate medicine in nanoparticles, the size of viruses. The nanoparticles are effective for drug delivery-the delivery of the medicine to the body-because they can very precisely find diseased cells and carry the medicine to them. This means that one can suffice with less dosage and thereby fewer side effects. In addition, nanoscience and nanotechnological methods are spurring the development of more sophisticated tools for detecting diseases, such as cancer and atherosclerosis, at early stages and performing neurosurgery. Applications of nanotechnology in disease diagnoses are developing rapidly. Their unique size-dependent properties make these materials superior and indispensable in many areas of human activity. © The Author(s) 2013. Source


Piri M.,Iran University of Science and Technology | Jasemi M.,Islamic Azad University at Masjed Soleyman | Abdi M.,Imam Hossein University
VINE | Year: 2013

Purpose: This paper experimentally examines the concept of intellectual capital in the Iranian space industries. The first objective of this study is to validate a model for assessing the relationships among some factors of intellectual capital and knowledge management; and organizational performance. The second objective is to evaluate the mediating role of some of them in the relationship between the intangible assets and organizational performance. Design/methodology/approach: The research is designed to utilize a systematic sampling and survey method. Intellectual capital here is decided to be four items of human, structural, innovation and cultural capital while two items of "knowledge development and sharing" and "learning and knowledge application" are considered for knowledge management. The structural equation modeling approach is used to validate the research model. Findings: These analyses suggest that human capital and structural capital are positively associated with organizational performance. The findings also indicate that both cultural capital and knowledge management practices fully mediate the effects of intangible assets on organizational performance while the latter does more. Originality/value: This study adds to the literature in two valuable ways. First, it validates a model for assessing the associations among organizational performance and adoption of knowledge management and intellectual capital. Second, it offers important results on the identification of mediating role of cultural capital and knowledge management practices. © Emerald Group Publishing Limited. Source


Golobostanfard M.R.,University of Tehran | Abdizadeh H.,University of Tehran | Mohammadi S.,University of Tehran | Baghchesara M.A.,Islamic Azad University at Masjed Soleyman
Solar Energy Materials and Solar Cells | Year: 2014

Hybrid transparent conductive films (TCFs) based on indium tin oxide (ITO) and carbon nanotubes (CNTs) are prepared through a sol-gel dip coating method. The effect of CNT diameter on optoelectrical properties of TCF is investigated. The surface roughness and grain size are decreased and the optical transmittance is increased with CNT diameter. The existence of bundles in smaller CNTs is the main reason for lower transmittance in these samples. In terms of electrical resistivity, the large diameter CNT incorporated ITO film shows lower sheet resistance than bare ITO film at high enough film thicknesses. It seems that the large diameter CNT incorporation in ITO matrix can remarkably reduce the microcrack formation, especially at higher thicknesses, and act as nanobridges when microcracks are formed. Furthermore, the sensitivity of ITO film to thermal cycling is dramatically enhanced with these CNTs. In addition, the figure of merit of ITO film is considerably improved with large diameter CNT incorporation. © 2014 Elsevier B.V. All rights reserved. Source


Hajiaghaei-Keshteli M.,Islamic Azad University at Masjed Soleyman
Applied Soft Computing Journal | Year: 2011

In this paper, two stages of supply chain network; distribution centers (DCs) and customers, are considered. There are customers with particular demands and potential places which are candidate to be as distribution centers. Each of the potential DCs can ship to any of the customers. Two types of costs are considered; opening cost, assumed for opening a potential DC plus shipping cost per unit from DC to the customers. The proposed model selects some potential places as distribution centers in order to supply demands of all customers. In order to solve the given problem, two algorithms, genetic algorithm and artificial immune algorithm, are developed. The Taguchi experimental design method is applied to select the optimum parameters with the least possible number of experiments. For the purpose of performance evaluation of proposed algorithms, various problem sizes are utilized and the computational results of the algorithms are compared with each other. Finally, we investigate the impacts of the rise in the problem size on the performance of our algorithms. © 2010 Elsevier B.V. All rights reserved. Source


Hajiaghaei-Keshteli M.,University of Tehran | Molla-Alizadeh-Zavardehi S.,Islamic Azad University at Masjed Soleyman | Tavakkoli-Moghaddam R.,University of Tehran
Computers and Industrial Engineering | Year: 2010

In this paper, we consider the fixed-charge transportation problem (FCTP) in which a fixed cost, sometimes called a setup cost, is incurred if another related variable assumes a nonzero value. To tackle such an NP-hard problem, there are several genetic algorithms based on spanning tree and Prüfer number representation. Contrary to the findings in previous works, considering the genetic algorithm (GA) based on spanning tree, we present a pioneer method to design a chromosome that does not need a repairing procedure for feasibility, i.e. all the produced chromosomes are feasible. Also, we correct the procedure provided in previous works, which designs transportation tree with feasible chromosomes. We show the previous procedure does not produce any transportation tree in some situations. Besides, some new crossover and mutation operators are developed and used in this work. Due to the significant role of crossover and mutation operators on the algorithm's quality, the operators and parameters need to be accurately calibrated to ensure the best performance. For this purpose, various problem sizes are generated at random and then a robust calibration is applied to the parameters using the Taguchi method. In addition, two problems with different sizes are solved to evaluate the performance of the presented algorithm and to compare that performance with LINGO and also with the solution presented in previous work. © 2010 Elsevier Ltd. All rights reserved. Source

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