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Search Results: 1 - 10 of 2024 matches for " Alireza Elhami "
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Impact of Information Technology on the Supply Chain Performance of the Car Segmentation Companies with Emphasis on the Integrity and Flexibility  [PDF]
Mahshid Mashreghi, Ebrahim Kalani, Alireza Elhami, Abas Farajpoor Alamdari, Iraj Bakhtiyari, Ehsan Kamrani
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.82021
Abstract: Companies are struggling in a highly competitive environment to accelerate their operations and operations. Discussions such as globalization and the expansion of networks such as the Internet are important issues that affect the resources, marketing, and other issues that companies engage with. The effects of information technology in industries, in the supply chain areas and in the value chain, are evident from the relationship with suppliers to production and communication with customers, including the impact of information technology on the supply chain performance. The purpose of this study was to investigate the relationship between information technology variables, integration and flexibility function in the automotive supply chain and the effect that information technology has on the supply chain performance. After collecting the data through a questionnaire from automobile manufacturers and analysis of the obtained model, the results show that the information technology which in this research includes the Internet, the organization’s network systems and combine system has a positive and direct effect on integration and flexibility. These results indicate that the use of information technology increases the integrity and flexibility of supply chain components and improves communication between them.
Selection of Investment Basis Using Neural Networks in Stock Exchange  [PDF]
Ebrahim Kalani, Alireza Elhami, Reza Baradaran Kazem-Zadeh, Ehsan Kamrani
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.83036
Abstract: A generalization is considered on the standard Marvowitz mean-variance model, which includes some limitative limbs. These restrictions guarantee the investment in a certain number of assets and limit the amount of capital that must be invested in any asset (stock). When the Markovitz mean-variance model is considered, the basket selection problem is a quadratic programming problem. But if this model is generalized with limitations, then the basket selection problem will be transformed into a quadratic programming and numerical design. In this recent model, there is no algorithm and method that can solve the basket selection problem optimally. In this case, the use of the heuristic algorithm is essential. Here in this paper a special neural network model has been used. The Hopfield network has been used to optimize some of the other optimization problems and it is used to solve the portfolio selection problem.
Customer Strategy for Implementing Customer Relationship Management in Corporation with the Value-Based Network Analysis Approach  [PDF]
Ebrahim Kalani, Alireza Elhami, Mahshid Mashreghi, Reza Baradaran Kazem-Zadeh, Ehsan Kamrani
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.83035
Abstract: With the new technology, organizations increasingly recognize the importance of managing customer relationships, and many of them have been deployed to customer relationship management (CRM) in order to serve customers better and build close relationships with them. On the other hand, the recognition of valued customers and their management has become an important issue. In today’s world, the business market is a complex network of tangible and intangible value relationships whose identification and optimal management is important. If these relationships are not optimally managed, it can lead to a great deal of harm to the organization and; on the other hand, if these relationships can be properly identified and managed, they can organize huge profits with the least cost. In this article, the target organization that focuses on the network, as well as its corporate clients, has been reviewed, and a model for explaining customer strategy for implementing CRM in a company (Saba Corporation in Iran) as an example has been presented. Further, on the characteristics of its customers, the organization’s policy has also been implemented. To do this, first, corporate customers focus on the value they focus on (customer lifetime value or CLV), and then the value chain will be implemented across the different segments of the corporate customer focus. By implementing the value chain among the various sections of the corporate customers, the hub can design suitable marketing programs for managing value paths and allocate appropriate budgets for each path.
Effect of Substrates of Spawn Production on Mycelium Growth of Oyster Mushroom Species
Behnam Elhami,Naser Alemzadeh Ansari
Journal of Biological Sciences , 2008,
Abstract: Spawn quality is the most important factor at production edible mushroom. In order to determine the effects of substrates spawn preparation on mycelium growth of oyster mushroom species, the experiment was conducted in a factorial experiment design at randomized completely with three replications. In the experiment, first and second factors respectively were substrates (wheat, corn and millet) and oyster mushroom species (Florida, Citrinopileatus and Ostreatus). The results clearly demonstrated that between various substrates used, maximum and minimum mycelium growth rate were recorded for corn and millet, respectively and between various used species, maximum and minimum mycelium growth rate was at Florida and Ostreatus species, respectively. Also the results showed that spawn dry matter has different considerably after completed maturation and between substrate maximum and minimum dry matter brought by corn and millet substrate, respectively, but it had not significant between various species. Similarly substrates by species interaction showed that the maximum and minimum mycelium growth rate were Florida with corn substrate and Ostreatus with millet substrate, respectively.
An Actual Survey of Dimensionality Reduction  [PDF]
Alireza Sarveniazi
American Journal of Computational Mathematics (AJCM) , 2014, DOI: 10.4236/ajcm.2014.42006

Dimension reduction is defined as the processes of projecting high-dimensional data to a much lower-dimensional space. Dimension reduction methods variously applied in regression, classification, feature analysis and visualization. In this paper, we review in details the last and most new version of methods that extensively developed in the past decade.

Histologic and histomorphometric study on the effects of lactoferrin and porous bovine bone mineral (Bio-Oss) on the regeneration of bone defects made on rabbit calvarium
Paknejad M,Rokn A,Sabur A,Elhami F
Journal of Dental Medicine , 2010,
Abstract: "nBackground and Aims: Nowadays reconstruction of alveolar defects has become one of dentists' problems especially in areas which are going to get dental implants. Inorganic bovine bone mineral (Bio-Oss) is one of the most popular graft materials that acts as a structure for migration of osteoblasts. If migration, proliferation, and differentiation of osteoblasts can be promoted by a material, it would be possible to reconstruct more amount of bone in a shorter period of time. Milk contains vital proteins that regulate bone growth. One of these important proteins is lactoferrin. The aim of this study was to examine the effect of added bovine lactoferrin to Bio-Oss on osteogenesis."nMaterials and Methods: Two doses of 50 and 500 μg/ml of lactoferrin were prepared. Ten New Zealand white rabbits were selected for this study. Four 6-mm symmetrical detects were created in each rabbit's calvarium. Two of these sites were filled with Bio-Oss that was wetted with two doses of lactoferrin. Third detect was filled with Bio-Oss alone and the forth one was left empty as control group. After 4 weeks histologic and histomorphometric analysis was performed."nResult: There was no sign of obvious inflammation in any of four groups. Also there was no difference among four groups in terms of vitality, type of new bone, and foreign body reaction. However, amount of bone formation in control group was significantly lower compared with the other 3 groups. Although lactoferrin containing groups showed little increase in bone formation especially in higher concentration, there was not statistically significant difference among the three test groups. Amount of remaining biomaterial also was lower in lactoferrin containing groups compared with the Bio-Oss group but the differences were not significant."nConclusion: Although there was no significant difference among the test groups, it seems that the added lactoferrin increases bone formation. Considering the limitations of this study, more studies are needed in different concentrations of lactoferrin and different healing periods. Furthermore, because of possible washout of the lactoferrin from the defects, it would be helpful to find and evaluate a proper carrier agent for lactoferrin to see its real effects.
Antibiotic sensitivity pattern of common bacterial pathogens in NICU and neonatal ward in Hamedan province of Iran  [PDF]
Alireza Monsef, Fatemeh Eghbalian
Health (Health) , 2010, DOI: 10.4236/health.2010.26094
Abstract: Bacterial pathogens and drug resistance are different in hospitals of each country. In this study we determined bacterial path- ogens and drug sensitivity in the neonatal ward and neonatal intensive care unit (NICU) in Ekbatan hospital in Hamedan. This cross-sectional descriptive study was done on 1150 hospitalized neonates in neonatal and NICU wards of Ekbatan hospital of the Hamadan university of medical sciences from September 2004 to September 2006. Blood, cerebrospinal fluid (CSF), urine, stool, eye excretion, synovial fluid, umbilical secretion and ascitic fluid were evaluated. Positive cultures were evaluated for antibiotic resistance with disk diffusion test methed. All of the data in questionnaires was analyzed with SPSS 13. Cultures including blood, urine, CSF , stool, eye excretion, synovial fluid, umbilical secretion and ascitic fluid was done in 417 neonates (833 cultures). These cultures were including: urine, 323 cases (38.8%) blood 293 cases (35.2%), CSF 180 cases (21.6%) , stool 17 cases (2%), eye secretion 16 cases (1.9%) and other secretions (synovial, umbilical, etc) 4 cases (0.5%). The cultures were positive in 105 cases (25.2%). 60 male neonates (57.1%) and 45 female neonates (42.9%) were culture positive. The most common microorganisms were E coli 66.7% (70 cases), Klebsiella 10.5% (11 cases). Drug resistance was high in these microorganisms. The most common microorganisms were Ecoli and klebsiella. Drug resistance was high in the isolated microorganisms.
Improving Mutual Coherence with Non-Uniform Discretization of Orthogonal Function for Image Denoising Application  [PDF]
Hani Nozari, Alireza Siamy
Journal of Signal and Information Processing (JSIP) , 2011, DOI: 10.4236/jsip.2011.23025
Abstract: This paper presented a novel method on designing redundant dictionary from known orthogonal functions. Usual way of discretization of continuous functions is uniform sampling. Our experiments show that dividing the function definition interval with non-uniform measure makes the redundant dictionary sparser and it is suitable for image denoising via sparse and redundant dictionary. In this case the problem is to find an appropriate measure in order to make each atom of dictionary. It has shown that in sparse approximation context, incoherent dictionary is suitable for sparse approximation method. According to this fact we define some optimization problems to find the best parameter of distribution measure (in our study normal distribution). For better convergence to optimum point we used Genetic Algorithm (GA) with enough diversity on initial population. We show the effect of this type of dictionary design on exact sparse recovery support. Our results also show the advantage of this design method on image denoising task.
The New Methods for Purifying the Industrial Effluents by Submerged Biofilm Reactors  [PDF]
Seyed Alireza Mousavi Shirazi
Journal of Environmental Protection (JEP) , 2011, DOI: 10.4236/jep.2011.27114
Abstract: Life on the earth is dependent on dynamic interactions between its physical, chemical and biological components. In fact, all the individual processes are responsible for regulating the environmental equilibrium which can provide biosphere for multiple forms of human life. In order to overcome on shortcomings, the use of immobilized cell bioreactor technology which provides a valuable effective for treatment of waste water is discussed. An immobilized system which in this matter is applied is about absorbed or captured microorganisms in a solid substratum to retain them in a reactor or analytical system. The multiply of these immobilized cells is done when by nutrients be supplied and then migrate to the surfaces which are referred to biofilms. The biofilms can be developed on various support systems such as polypropylene pall, rocks, sands, charcoal, ceramics, and glass beads. The controllable reaction vessels which are used for these colonized surfaces are referred to bioreactors. Bioreactors in both up flows and down flows mode which use of either batch or continuous processes principle can be operated. Synchronic with development in biotechnology, there is also an extensive development in the field of bioreactors like: pumped tower loop reactor (PTLR), liquid impelled loop reactor (LILR), multipurpose tower bioreactor (MTB), fluidized-bed and packed-bed bioreactor, that in this article are discussed them.
Postoperative Drains at the Donor Sites of Iliac-Crest Bone Grafts in Patients Who Had a Single Comminuted Long Bone Fracture  [PDF]
Ali Karbalaeikhani, Alireza Saied
Surgical Science (SS) , 2011, DOI: 10.4236/ss.2011.29095
Abstract: In this clinical trial, 90 patients admitted to orthopedics ward, Shahid Mohammadi Hospital, Bandar Abbass with a long bone fracture, comminuted more than 30%, were randomly divided into two groups. In the first group, after the completion of the operation, a single hemovaccum drain was inserted into the iliac crest wound, the site of cancellous bone removal, whereas the second group didn’t receive a drain. The two groups were followed for at least six months and the results were compared with Chi-Square and T-Tests. The two groups, at the end of the follow up period, had no statistically significant difference with regard to pain severity and need for dressing change (in the immediate postoperative period), hematoma formation and infection. So it seems that drain insertion in the wound of patients in whom cancellous bone is removed from the iliac crest, is not necessary.
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