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Search Results: 1 - 10 of 1098 matches for " Mehrdad Nazari Asli "
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A Hybrid Model for Supplier Selection in Outsourcing: Evidence from Shima Film Company in Iran
Arefe Fadavi,Ali Servati Khanghah,Mehrdad Nazari Asli
Research Journal of Applied Sciences, Engineering and Technology , 2013,
Abstract: Outsourcing is one of the important strategies acknowledged by firms recently. However, outsourcing needs a more intelligent and informed decisions in the organizations. In this study, we propose a new hybrid Multiple Criteria Decision-Making (MCDM) model, which addresses the dependent relationships between the various criteria. Decision-makers tend to hold diverse opinions about their preferences due to incomplete information and knowledge, or inherent conflict between various departments. We further used the fuzzy preference programming and the Analytic Network Process (ANP) to form a model for the selection of partners for outsourcing providers. The proposed model can help practitioners improve their decision making process, especially when criteria are numerous and inter-related. Finally, regarding the importance of subject, we will analyze the results while conducting a case study.
Applying a Hybrid QFD-TOPSIS Method to Design Product in the Industry (Case Study in Sum Service Company)
Babak Haji Karimi,Mohamad Mehdi Mozafari,Mehrdad Nazari Asli
Research Journal of Applied Sciences, Engineering and Technology , 2012,
Abstract: Electronics industry as an industry with high added value and television production industry especially as one of its pillars play an important role in the economy of each country. Therefore, the aim study of this paper is to illustrate how, using a combined QFD-TOPSIS model, organizations are able to their design product in accordance with requirements of consumers with a case study in Sum Service Company. Quality Function Deployment (QFD) is one such extremely important quality management tool that is useful in product design and development. Traditionally, QFD rates the Design Requirements (DRs) with respect to customer needs and aggregates the rating to get relative importance score of DRs. An increasing number of studies emphasize on the need to incorporate additional factors, such as cost and environmental impact, while calculating the relative importance of DRs. However, there is variety of methodologies for driving the relative importance of DRs, when several additional factors are considered. TOPSIS (technique for order preferences by similarity to ideal solution) is suggested for the purpose of the research. This research proposes new approach of TOPSIS for considering the rating of DRs with respect to CRs and several additional factors simultaneously. Proposed method is illustrated using by step-by-step procedure. The proposed fuzzy QFDTOPSIS methodology was applied for the Sum Service Company in Iran.
Determination of Trace Amounts of Lead by Modified Graphite Furnace Atomic Absorption Spectrometry after Liquid Phase Microextraction with Pyrimidine-2-thiol  [PDF]
Saeid Nazari
American Journal of Analytical Chemistry (AJAC) , 2011, DOI: 10.4236/ajac.2011.27087
Abstract: The liquid phase microextraction (LPME) was combined with the modified Graphite furnace atomic absorption spectrometry (GF-AAS) for determination of lead in the water and solid samples. In a preconcentration step, lead was extracted from a 2 ml of its aqueous sample in the pH = 5 as lead-Pyrimidine-2-thiol cationic complex into a 4 µl drop of 1,2 dichloroethane and ammonium tetraphenylborate as counter ion immersed in the solution. In the drop, the lead-Pyrimidine-2-thiol ammonium tetraphenylborate ion associated complex was formed. After extraction, the microdrop was retracted and directly transferred into a graphite tube modified by [W.Pd.Mg] (c). Some effective parameters on extraction and complex formation, such as type and volume of organic solvent, pH, concentration of chelating agent and counter ion, extraction time, stirring rate and effect of salt were optimized. Under the optimum conditions, the enrichment factor and recovery were 525% and 94%, respectively. The calibration graph was linear in the range of 0.01 - 12 µg?L–1 with correlation coefficient of 0.9975 under the optimum conditions of the recommended procedure. The detection limit based on the 3Sb criterion was 0.0072 µg?L–1 and relative standard deviation (RSD) for ten replicate measurement of 0.1 µg?L–1 and 0.4 µg?L–1 lead was 4.5% and 3.8% respectively. The characteristic concentration was 0.0065 µg?L–1 equivalent to a characteristic mass of 26 fg. The results for determination of lead in reference materials, spiked tap water and seawater demonstrated the accuracy, recovery and applicability of the presented method.
Distributed Voltage and Current Control of Multi-Terminal High-Voltage Direct Current Transmission Systems
Martin Andreasson,Mohammad Nazari,Dimos V. Dimarogonas,Henrik Sandberg,Karl H. Johansson,Mehrdad Ghandhari
Mathematics , 2013,
Abstract: High-voltage direct current (HVDC) is a commonly used technology for long-distance power transmission, due to its low resistive losses and low costs. In this paper, a novel distributed controller for multi-terminal HVDC (MTDC) systems is proposed. Under certain conditions on the controller gains, it is shown to stabilize the MTDC system. The controller is shown to always keep the voltages close to the nominal voltage, while assuring that the injected power is shared fairly among the converters. The theoretical results are validated by simulations, where the affect of communication time-delays is also studied.
Learning and Teaching Ethics through Stories: A Few Examples from the Buddhist Tradition  [PDF]
Mehrdad Massoudi
Creative Education (CE) , 2010, DOI: 10.4236/ce.2010.11004
Abstract: The art of storytelling, similar to poetry, takes us to a different realm, yet always bringing us back to where we are. In many traditional societies, ethical concerns were taught through stories. A few stories from the Buddhist tradition have been selected to convey some basic teachings of the Buddha on ethical issues. This does not mean that these few stories capture the whole of Buddhist ethics. Furthermore, it is understood that similar stories can be found in other traditions, and therefore the same technique can be used in other religions as well. The universalities of these stories provide a means to teach ethics in a multi-cultural context.
Epidemiological Pattern of Scabies and Its Social Determinant Factors in West of Iran  [PDF]
Mansour Nazari, Aziz Azizi
Health (Health) , 2014, DOI: 10.4236/health.2014.615231
Abstract: Objectives: Scabies has a different epidemiological distribution among different communities worldwide due to different social factors, management approaches and healthcare policies. The present study came to address outbreaks of scabies according to the social factors in west of Iran. Methods: In a cross-sectional study, using the census sampling method, all consecutive patients with the primary diagnosis of scabies based on clinical manifestations referred to healthcare center throughout the two great provinces of Hamadan and Kermanshah at western Iran between March 2006 and February 2010 were enrolled into the study. The baseline characteristics were collected from recorded files at the healthcare centers or by interviewing with the affected patients. Results: Among 3,625,966 subjects covered by the two studied provinces, 177 cases of scabies (170 cases in Kermanshah and 7 cases in Hamadan) were identified by medical staff at the healthcare centers according to clinical manifestations (85.3%) and laboratory microscopic assessments (14.7%). The highest and the lowest prevalence rates were specified to 2009 (58.2%) and 2008 (1.7%). Regarding gender distribution of disease, 53.1% of men and 46.9% of women suffered from scabies with no significant discrepancy. In respect to age distribution of disease, the highest rates of scabies were revealed in the ages ranged 17 to 30 years (31.6%), followed by younger than 17 years (30.5%). The prevalence of scabies was dependently associated with residency in rural areas, family history of scabies, lower educational level, household density, lower monthly income, low personal hygiene, the existence of livestock or rodents at home, seasonal conditions, and movement to contaminated areas. Conclusion: West region of Iran especially Kermanshah province faced with high prevalence and this high disease burden can be determined by some potential factors such as residency in rural areas, family history of scabies, lower educational level, household density, lower monthly income, low personal hygiene, the existence of livestock or rodents at home, seasonal conditions, and movement to contaminated areas.
Vaginitis in Intrauterine Contraceptive Device Users  [PDF]
Fatemeh Shobeiri, Mansour Nazari
Health (Health) , 2014, DOI: 10.4236/health.2014.611149
Abstract: Objectives: This study aimed to assess clinical, microbial changes in IUD users and other contraceptive methods in referent to urban health centers in Hamadan city, Iran. Methods: Detailed history and gynecological examination were conducted on women (IUD users, n = 100) or other contraceptive methods (controls, n = 160) in the health centers. Results: Frequencies of the different vaginal pathogens, high indices of infection by bacterial vaginosis (12.0%) candida albicance (7.0%) and low indices of trichomoniasis (5.0%) were found in present study, but none of them in both groups was significant. Menorrhagia was more frequent among women with IUD than that among women without IUD (P < 0.05). A trend of erosion cervix and dysmenorrhea being more frequent among women with IUD was also found (P < 0.05). Conclusions: IUD is the safety in general; however, an increase occurred in the frequency of vaginitis.
A study on some efficient parameters in batch fermentation of ethanol using Saccharomyces cerevesiae SC1 extracted from fermented siahe sardasht pomace
MS Asli
African Journal of Biotechnology , 2010,
Abstract: Siahe sardasht grape is famous variety of grape in Iran that is used for red grape juice concentrate. The pomace of this grape (as byproduct of fruit juice concentrate industry) is a favorable medium for growth of all type of yeasts. The ethanol production using Saccharomyces cerevesiae SC1 extracted from fermented siahe sardasht grape pomace was studied in batch fermentation. The best ethanol production rates are observed at pH 4.5, temperature 32°C and sugar concentration equal to 100 g/L. According to the results, KH2PO4 is a better phosphorous source in comparison with K2HPO4, and (NH4)2SO4 is the best nitrogen source.
A Converse Landing Theorem in Parameter Spaces
Asli Deniz
Mathematics , 2015,
Abstract: In this article, under very general conditions for one parameter holomorphic families of holomorphic maps, for a given parabolic parameter, we give a transparent proof for landing of (a) parameter ray(s) at the parabolic parameter in question. Moreover, we partially answer the question of existence of rays in parameter spaces.
A Modified Precondition in the Gauss-Seidel Method  [PDF]
Alimohammad Nazari, Sajjad Zia Borujeni
Advances in Linear Algebra & Matrix Theory (ALAMT) , 2012, DOI: 10.4236/alamt.2012.23005
Abstract: In recent years, a number of preconditioners have been applied to solve the linear systems with Gauss-Seidel method (see [1-7,10-12,14-16]). In this paper we use Sl instead of (S + Sm) and compare with M. Morimoto’s precondition [3] and H. Niki’s precondition [5] to obtain better convergence rate. A numerical example is given which shows the preference of our method.
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