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Search Results: 1 - 10 of 3551 matches for " Amir Ershad Fanaei "
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Experimental Characterization by Fluorescence of Capillary Flows in the Fiber Tows of Engineering Fabrics  [PDF]
Fran?ois LeBel, Amir Ershad Fanaei, édu Ruiz, Fran?ois Trochu
Open Journal of Inorganic Non-metallic Materials (OJINM) , 2012, DOI: 10.4236/ojinm.2012.23004
Abstract: Liquid Composite Molding (LCM) is an increasingly used class of processes to manufacture high performance composites. In LCM, the fibrous reinforcement is first laid in a mold cavity. After closure of the mold or covering of reinforcement with a plastic bag, a polymer resin is either injected or infused under vacuum through the fiber bed. The engineering fabrics commonly used in LCM possess generally dual scale architecture in terms of porosity: microscopic pores exist between the filaments in the fiber tows, while macroscopic pores appear between the tows as a result of the stitching/weaving fabrication process. On a microscopic scale, capillary flows in fiber tows play a major role on the quality of composites made by resin injection through fibrous reinforcements. In order to better understand the mechanisms that govern the impregnation of fibrous reinforcements in LCM, a study of wicking behavior is carried out in fiber tows. The experimental approach is based on capillary rise experiments, which are less expensive and time-consuming than other more standard characterization techniques often used in porous media. In addition, it allows gathering representative data on the wicking properties of fiber tows as a function of their morphological characteristics such as micro-porosity, total cross-section area, specific surface area, filament diameter and packing configuration. The morphological properties of the fiber tows will also be characterized by other standard experimental methods in order to compare with the results obtained by capillary rise experiments. These standard methods include gravimetry for the micro-porosity and fiber mass density, microscopic analysis to measure the filament diameter, cross-section area and packing configuration of the filaments and capillary flow porometry to evaluate the equivalent pore diameter. The capillary rise method has already been used not only in Soil Mechanics, but also to characterize engineering textiles used in high performance composites. Such experiments are not easy to perform, because of technical difficulties such as textile geometrical alteration during testing, changes in fluid properties due to solvent evaporation and inaccurate observation of the progression of the capillary front (fading). To circumvent these problems, a monitoring technique based on fluorescent dye penetration inspection (DPI) and CCD image acquisition is proposed in this investigation. Visual monitoring of the capillary front is coupled with real-time fluid mass acquisition using a high resolution balance. Experimental
Cognitive Congestion Control for Data Portals with Variable Link Capacity  [PDF]
Ershad Sharifahmadian, Shahram Latifi
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2012, DOI: 10.4236/ijcns.2012.58058
Abstract: Network congestion, one of the challenging tasks in communication networks, leads to queuing delays, packet loss, or the blocking of new connections. In this study, a data portal is considered as an application-based network, and a cognitive method is proposed to deal with congestion in this kind of network. Unlike previous methods for congestion control, the proposed method is an effective approach for congestion control when the link capacity and information inquiries are unknown or variable. Using sufficient training samples and the current value of the network parameters, available bandwidth is adjusted to distribute the bandwidth among the active flows. The proposed cognitive method was tested under such situations as unexpected variations in link capacity and oscillatory behavior of the bandwidth. Based on simulation results, the proposed method is capable of adjusting the available bandwidth by tuning the queue length, and provides a stable queue in the network.
Single-machine batch scheduling minimizing weighted flow times and delivery costs with job release times
Mohammad Mahdavi Mazdeh,Ali Naji Esfahani,Seyyed Ershad Sakkaki,Amir Ebrahimzadeh Pilerood
International Journal of Industrial Engineering Computations , 2012,
Abstract: This paper addresses scheduling a set of weighted jobs on a single machine in presence of release date for delivery in batches to customers or to other machines for further processing. The problem is a natural extension of minimizing the sum of weighted flow times by considering the possibility of delivering jobs in batches and introducing batch delivery costs. The classical problem is NP-hard and then the extended version of the problem is NP-hard. The objective function is that of minimizing the sum of weighted flow times and delivery costs. The extended problem arises in a real supply chain network by cooperation between two layers of chain. Structural properties of the problem are investigated and used to devise a branch-and-bound solution scheme. Computational experiments show the efficiency of suggested algorithm for solving instances up to 40 jobs.
Retroperitoneal Cystic Lymphangioma: Case Report  [PDF]
S. A Fanaei, S. A Ziaee
Surgical Science (SS) , 2011, DOI: 10.4236/ss.2011.24046
Abstract: Introduction: Retroperitoneal cystic lymphangioma is a rare benign tumor of the retroperitoneal lymphatics that usually manifests in infancy. It is worth to Report of unexpected presentation especially in Adult. Case Presentation: An adult patient with Left Lower abdominal was referred to our hospital. Abdominal ultra-sonography revealed a large, multilocular, cystic mass with an obscure margin. CT of the abdomen showed a large homogeneous mass. Laparoscopy revealed a huge retroperitoneal cystic lymphangioma confirmed by histopathology. Conclusion: Adult cyst lymphangioma is the rare benign tumor with unclear intra abdominal manifestation. In our report the retroperitoneum was the rare location of this tumor.
Does Scholarship Scheme Contribute to Gender Parity in Female Education? The Case of Secondary Education in Bangladesh
Ershad Ali
Cross-Cultural Communication , 2010, DOI: 10.3968/976
Abstract: Gender parity in education plays an important role in socio-economic development of a country where the government policies and procedures are paramount factors for its sustainability. Although Bangladesh has been working to improve the female students enrolment at secondary education since its independence; the achievement is considered insignificant. Recently the country has introduced female secondary education enhancement policy to increase and ensure female students’ enrolment. The paper has analysed the impact of this policy regarding the female secondary education in Bangladesh. Using secondary data, the paper analysed the policy-impacts through changes in the pattern and trend of female secondary student enrolment, the indices of gross enrolment ratio (GER), net enrolment ratio (NER) and net attendance rate (NAR). It also analysed gender disparity index (GDI) and gender parity index (GPI) in secondary education. The paper found that the undertaken policy has positively impacted on female secondary education in Bangladesh but the rate of drop-out and failed students is much higher for female than those for male which raises a question of the effectiveness of the policy. The government should formulate a complementary education policy to achieve desired quantity and quality female secondary education. The findings of the paper might be of interest for researchers, development practitioners and policy makers. Key words: Gender; female; secondary education; education policy; Bangladesh
Impact of Free Trade Agreement on Economic Growth of Partner Countries: China and New Zealand
Ershad Ali
International Business and Management , 2011,
Abstract: China and New Zealand would be commencing negotiations on a closer economic partnership (CEP) agreement. Both party believe that a CEP agreement would increase bilateral trade flows and generate new employment opportunities through export lead growth in their economy. The benefits of a CEP agreement with China are likely to outweigh the costs, especially` in the longer term. In 1987, Chinese export amount increase from US$9.75 billion US$ to US$339.437 billion; and import amount from US$2.064 billion to US$8.265 billion (Statistic China, 1996). Also, from the quality of trade, even China still has large gap with the top ten countries of international trade, but this gap already starts to be smaller compare to what China had prior to reform and opening the free trade agreement between New Zealand and China came into force in 2008. After the free trade agreement China and New Zealand, China’s government has decreased tariff rate on agriculture product. From free trade agreement, whether New Zealand gain more business opportunities or not depends on tourism, agriculture, and different forestry industries. Therefore, China has highest population created potential markets. In the meantime, China also exports electronic goods, footwear, clothing and computer to New Zealand because New Zealand is short of these industries. This paper examines the impact of Free Trade Agreement (FTA) between New Zealand and China. Key words: Free trade agreement; China; New Zealand; Tariff
Impact of Free Trade Agreement on Economic Growth of Partner Countries: China and New Zealand
Ershad Ali
International Business and Management , 2010,
Abstract: China and New Zealand would be commencing negotiations on a closer economic partnership (CEP) agreement. Both party believe that a CEP agreement would increase bilateral trade flows and generate new employment opportunities through export lead growth in their economy. The benefits of a CEP agreement with China are likely to outweigh the costs, especially` in the longer term. In 1987, Chinese export amount increase from US$9.75 billion US$ to US$339.437 billion; and import amount from US$2.064 billion to US$8.265 billion (Statistic China, 1996). Also, from the quality of trade, even China still has large gap with the top ten countries of international trade, but this gap already starts to be smaller compare to what China had prior to reform and opening the free trade agreement between New Zealand and China came into force in 2008. After the free trade agreement China and New Zealand, China’s government has decreased tariff rate on agriculture product. From free trade agreement, whether New Zealand gain more business opportunities or not depends on tourism, agriculture, and different forestry industries. Therefore, China has highest population created potential markets. In the meantime, China also exports electronic goods, footwear, clothing and computer to New Zealand because New Zealand is short of these industries. This paper examines the impact of Free Trade Agreement (FTA) between New Zealand and China. Key words: Free trade agreement; China; New Zealand; Tariff
Identifying Methodology for Assessing Sustainable Energy Technology for Rural Bangladesh
Ershad Ali
Energy Science and Technology , 2011,
Abstract: : The paper aims to identify methodology appropriate for assessing Sustainable Energy Technology (SET) for rural population in a way so that the technology fits with rural people’s need, aspiration, and economic and technical ability. Available literature suggests good number of methods but their main focus is either on specific energy technology or on environmental impact. This paper aims to fill that gap. Based on secondary data, the study found that appropriate method should address the socio economic and technical variables while assessing technologies for rural community. The study suggests that methodology should use more than one technique to collect data from primary source. Findings of the study might be useful for researchers, development practitioners and energy policy makers. Key words: Sustainable Energy Technology; Methodology; Rural Bangladesh
The Transfer of Sustainable Energy Technology to Developing Countries: Understanding the Need of Bangladesh
Ershad Ali
Energy Science and Technology , 2011,
Abstract: This article provides a critical review of the literature on potential Sustainable Energy Technology (SET) transfer as a means of mitigating Greenhouse Gas (GHG) emission, and preserving sustainable development within the rural community of developing countries, such as Bangladesh. A global concern about the rate of increase of GHG emission in the atmosphere makes it evident that it could be reduced through the use of SET rather than fossil fuel. Though SET is available in the global market, it is yet far from the reach of developing countries, which necessitates SET transfer from developed to the developing countries. However, there is a gap between reality and the ways and means of SET transfer suggested and discussed in earlier studies. This paper addresses that gap. Key words: Sustainable energy technology; Greenhouse gas; Bangladesh
Hypercyclic direct sum of tuples
B. Yousefi,F. Ershad
International Journal of Mathematical Analysis , 2012,
Abstract:
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