ali nasiri - Academia.edu (original) (raw)

Papers by ali nasiri

PLOS ONE, Dec 29, 2016

Introduction Coronary artery disease (CAD) and hypertension are the main reasons of ischemic hear... more Introduction Coronary artery disease (CAD) and hypertension are the main reasons of ischemic heart diseases (IHDs). Cytokines as the small glycoproteins are the main arm of immune system and manipulate all of the cardiovascular diseases. The aim of the current study was to examine the effects of treatment of hypertension and CAD on serum levels of IL-6, IL-8, TGF-β and TNF-α. Material and Methods This interventional study was performed on the patients with hypertension without CAD (group 1), hypertension and CAD (group 2), CAD but not hypertension (group 3) and without hypertension and CAD as controls (group 4). The patients received routine treatment for hypertension and CAD. Serum levels of IL-6, IL-8, TGF-β and TNF-α were analyzed in the groups treated with various drugs, using ELISA technique. Results With regard to the medications, Atorvastatin, Losartan and Captopril were administered more in patients (groups 1, 2 and 3) than the patients without hypertension and CAD. The results revealed that serum levels of TGF-β and IL-6 were significantly increased and PLOS ONE |

Global Journal of Health Science, May 7, 2014

Background and objective: Equality in distribution of health care facilities is the main cause fo... more Background and objective: Equality in distribution of health care facilities is the main cause for access and enjoyment to the health. The aim of this study was to examine the regional disparities in health care facilities across the Markazi province. Methods: This was a cross-sectional study. Study sample included the cities of Markazi province, ranked based on 15 health indices. Data was collected by a data collection form made by the researcher using statistical yearbook. The indices were weighted using Shannon entropy. Finally, technique for order preference by similarity to ideal solution (TOPSIS) was used to rank the towns of the province in terms of access to health care facilities. Results: There is a large gap between cities of Markazi province in terms of access to health care facilities. Shannon entropy introduced the number of urban health centers per 1000 people as the most important indicator and the number of rural active health house per 1000 people as the less important indicator. According to TOPSIS, the towns of Ashtian and Shazand ranked the first and last (10 th) respectively in access to health services. Conclusion: There are significant inequalities in distribution of health care facilities in Markazi province. We propose that policy makers determine resource allocation priorities according to the degree of development for a balanced and equal distribution of health care facilities.

Urmia medical journal, Jul 10, 2011

Background & Aims: Shiga toxin-producing Escherichia coli (STEC), has appeared universally as an ... more Background & Aims: Shiga toxin-producing Escherichia coli (STEC), has appeared universally as an important zoonotic food-borne pathogen. Infection with STEC in human has different clinical picture, from mild secretory diarrhea, to hemorrhagic colitis (HC) which can lead to life threatening sequelae like haemolytic uremic syndrome. The purpose of this study was to determine antibiotic resistance profile of shiga toxin-producing E. coli (STEC), molecular identification, and antibacterial activity of Zataria multiflora bioss and Carum copticum essential oil against them. Materials & Methods: In this study, two hundred fecal samples were taken from Buffalo in West Azarbaijan province and examined for Shiga Toxin-producing Escherichia coli by PCR. Antimicrobial susceptibility of the isolates was considered by the disk diffusion method. Results: The results showed that 13 (8/6 %) of isolates harbored the Shiga toxin genes, containing three (23 %) was positive for stx 1 and stx 2, 5 (38%) was positively identified for stx 1 , and 5 (38%) was positive for stx 2. Multi-drug resistance was detected in all STEC strains, all STEC were resistant to Ampicillin, neomycin, streptomycin, erytromycin, kanamycin, amoxicillin. Tobramycin,Cefotoxime and tetracycline were most effective and all STEC isolates were susceptible to them. Conclusion: According to the results buffalo has important role as a resorvior for STEC in Iran. On the other hand, the isolates showed a high rate of resistance to anti-microbial agents and multi-drug resistance was remarkably common. Finally, the antibacterial activity of plant essential oil would warrant further studies on the clinical applications.

مجله علوم بهداشتی جندیشاپور, Jan 20, 2015

Background: Determining and understanding of healthcare costs and its financing method is one of ... more Background: Determining and understanding of healthcare costs and its financing method is one of the most important subjects understatement of which can cause such major problems as excessive health costs for households due to the high rate of out-of-pocket expenses. Objectives: The current study aimed to analyze the healthcare costs and determine the share of Isfahan province, Iran, from the total healthcare costs of the country from 2006 to 2011. Materials and Methods: It was a retrospective and descriptive-analytical study. The required statistical data were gathered from statistical yearbooks of the country and the province, the website of the World Bank, the statistics provided by the Healthcare Department of Isfahan and Kashan Universities of Medical Sciences and the statistical data provided by Iran Statistics Center in 2011, all covering the period of six years from 2006 to 2011. Excel software was used for data analysis and computations of the research. Results: During this period, the annual growth average of healthcare and treatment costs were 12% and 20%, respectively. The share of the healthcare sector declined from 33% in 2006 to 25.4% in 2011. In other words, healthcare cost per capita, being about one second of the treatment cost per capita, reduced to a third of treatment per capita in 2011. Conclusions: Efficient allocation of financial resources in the healthcare system based on specific goals and strategies, coordination of public and private sectors in providing healthcare services, the rising share of the healthcare sector in GDP of the province and the country, and the preference of prevention over treatment measures can affect achieving the healthcare system goals and surmount challenges such as pay-out-of-pocket and rising healthcare costs, particularly the costs of integrated treatment with full performance.

IEEE Access, 2021

Virtual Network Embedding (VNE), which provides methods to assign multiple Virtual Networks (VN) ... more Virtual Network Embedding (VNE), which provides methods to assign multiple Virtual Networks (VN) to a single physical Substrate Network (SN), is an important task in network virtualization. The main problem in VNE is the efficiency of assigning customers' virtual network requests to the substrate network. This problem is known to be a Non-deterministic Polynomial-time hard (NP-hard) and heuristic solutions have been developed to solve this kind of problem. The current trend toward Software-Defined Networking (SDN) has allowed new possibilities in virtual network embedding. In this work, we propose a distributed virtual network embedding for SDNs called DVSDNE using multi-agent systems. This framework could be used to run a centralized VNE algorithm in a distributed manner to scale these algorithms with respect to network size. DVSDNE uses agents to spread the load across the substrate network. Our simulation results show the effectiveness of the proposed algorithm. Results show that DVSDNE improves execution time of embedding algorithms in large scale substrate networks, while embedding results such as acceptance ratio, revenue to cost ratio, average latency to controller, and maximum latency to controller remain comparable. INDEX TERMS Graph partitioning, multi-agent systems, network virtualization, software-defined networking (SDN), virtual network embedding.

PubMed, Jul 31, 2015

Toll like receptor 4 (TLR4) is one of the most pivotal pathogen recognition receptors (PRRs) in i... more Toll like receptor 4 (TLR4) is one of the most pivotal pathogen recognition receptors (PRRs) in innate immune systems. In this study, we evaluate the expression of the TLR4 in patients with diabetes mellitus type 2 (DM2) in comparison to healthy controls. Expression of TLR4 in 32 human peripheral blood mononuclear cells (PBMCs) of patients with DM2 and 20 control samples was assessed using Real—Time PCR technique. For each patient, body mass index (BMI) and blood glucose levels were measured. The results of Real—Time PCR showed a 5—folds increase in expression of TLR4 on the PBMCs of DM2 patients in comparison to controls. No correlation was observed between the TLR4 expression and sex or BMI. Our results confirmed that DM2 can increase TLR4 expression independent from sex, blood glucose concentrations and BMI.

DOAJ (DOAJ: Directory of Open Access Journals), Aug 1, 2014

to inflammatory factors release, cellular growth, and acceleration of cartilage growth. The most ... more to inflammatory factors release, cellular growth, and acceleration of cartilage growth. The most commonly used stimulant used for intraarticular prolotherapy is dextrose. [5,6] Now-a-days, using different blood components such as platelets and whole blood has been taken into consideration as well. Erythropoietin, a growth stimulant and red blood cells proliferator released from kidney, has stimulant effects on bone marrow cells' growth. [7-10] Myriad of studies are being done on the effects of erythropoietin on the nonhematopoietic parts such as musculoskeletal system. [11-17] However, there is little experience with its intra-articular functions, but it's usage has shown enhancement in osteochondral healing and cartilage repair in an animal study due to the paucity of previous Background: Osteoarthritis is one of the most common diseases and the knee is the most commonly affected joint. Intra-articular prolotherapy is being utilized in acute and chronic pain management setting. This study was designed to compare the efficacy of three methods of intra-articular knee joint therapies with erythropoietin, dextrose, and pulsed radiofrequency. Materials and Methods: After approval by the Ethics Committee and explaining the therapeutic method to volunteers, 70 patients who were suffering from primary knee osteoarthrosis went through one of the treatment methods (erythropoietin, dextrose, and pulsed radiofrequency). The study was double-blind randomized clinical trial performed from December 2012 to July 2013. Patients' pain level was assessed through the visual analog pain scale (VAS), and range of motion (ROM) was measured by goniometric method. Furthermore, patients' satisfaction was assessed before and after different treatment methods in weeks 2, 4, and 12. For analysis, Chi-square, one-way ANOVA, and repeated measured ANOVA were utilized. Results: The demographic results among the three groups did not indicate any statistical difference. The mean VAS in erythropoietin group in the 2 nd , 4 th , and 12 th weeks was 3.15 ± 1.08, 3.15 ± 1.08, and 3.5 ± 1.23, respectively (P ≤ 0.005). Knee joint ROM in the erythropoietin group in the 2 nd , 4 th , and 12 th weeks was 124 ± 1.50, 124 ± 1.4, and 123 ± 1.53 respectively (P ≤ 0.005). Satisfaction score in the 12 th week in erythropoietin group was extremely satisfied 15%, satisfied 55%, and moderately satisfied 30%, (P = 0.005). No specific side-effects were observed. Conclusion: Intra-articular prolotherapy with erythropoietin was more effective in terms of pain level reduction and ROM improvement compared with dextrose and pulsed radiofrequency.

Herbal medicines are the major remedy in traditional medical systems from thousands ofyears and m... more Herbal medicines are the major remedy in traditional medical systems from thousands ofyears and made a great contribution in maintaining human health and in preventing many infectious diseases. The present study was carried out to determine the potential antibacterial effect of ethanol extracts and of Cuminum cyminum and Piper nigrum against Klebsiella pneumoniae which is antibiotic resistant. All 20 isolates of Klebsiella Pneumonia isolated from urine culture of hospitalized patients suffered from urinary tract infections were evaluated. Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of plants extract against bacteria were determined using micro dilution broth method. The result show that the least MIC value of alcoholic extract of C.cyminum was 1.25 mg/ml and the highest MBC value of alcoholic extract of C.cyminum were 10 mg/ml. The least MIC and MBC value of alcoholic extract of P. nigrum were 0.62 mg/ml.

Iet Electric Power Applications, Jun 29, 2020

The performance analysis of a hybrid hysteresis motor using an analytical model is presented in t... more The performance analysis of a hybrid hysteresis motor using an analytical model is presented in this study. The proposed hybrid motor benefits fromthe advantages of both the conventional axial and radial flux hysteresis motors with a unique stator. For the design of the proposed machine, a pre-studied hybrid hysteresis motor is investigated. To modify the field equations, the hyperbolic approximation of the hysteresis loop is implemented to investigate the effects of the minor loops described by the harmonic components of the field. Next, the impact of the harmonics of the magnetomotive force on machine performance is estimated by an iterative approach. Then, the closed-form expressions for the developed torque are obtained in both planes and the results are stacked-up linearly by considering the basics of the superposition theorem. To evaluate the performance of the proposed machine and also the accuracy of the analysis approach, a laboratory prototype has been built. The test results validate the acceptable performance of the proposed hysteresis motor. Fig. 10 Measured terminal current and power factor of the hybrid, axial, and radial structures versus the input power

2019 International Power System Conference (PSC), Dec 1, 2019

Simple and robust structure, self-starting and smooth operation with low noise and vibration are ... more Simple and robust structure, self-starting and smooth operation with low noise and vibration are the most attractive advantages of the Hysteresis Motor (HM) which makes it suitable for high speed constant torque applications. High magnetizing current and low efficiency and power factor are the major drawbacks of the conventional HMs. On the other hand, the PM motors are widely used because of high efficiency, high power factor and relatively high stability at synchronous speed. However, PM motors suffer from having no starting torque and generating considerable oscillating torque. This paper presents a novel Multi-Stack PM-Hysteresis Motor in order to improve the performance characteristics of the conventional HM. In the optimal design procedure, the electrical equivalent circuits (EECs) are used for evaluating the operating parameters. A multi-objective optimization using Imperialist Competitive Algorithm as the solver is established for improving the efficiency and power factor of the machine as well as reducing the rotational inertia, overall volume and speed oscillations, simultaneously. The feasibility of the designed machine is guaranteed by considering the electrical, mechanical, magnetic and the thermal constraints. Finally, the appropriate performance of the optimized structure is validated using 2D time-stepping finite element analysis.

Global Business and Organizational Excellence, Dec 22, 2014

Addressing a lack of research on the relationship between marketing and supply chain management, ... more Addressing a lack of research on the relationship between marketing and supply chain management, a new conceptual framework incorporates organizational learning, supply chain innovation, trust, supply chain management strategy, commitment, and collaboration as mediating factors in the relationship between market orientation and supply chain performance. Only by identifying the dimensions of effective performance and assessing their impact on each other can organizational leaders strengthen the bonds among partners in the supply chain toward generating the efficiencies that improve its management and performance. The proposed framework can also be used to facilitate further research into the link between market orientation and supply chain performance.

Prehospital and Disaster Medicine, Jul 8, 2020

Flood is the most common natural hazard in Iran, which annually affects the environment and human... more Flood is the most common natural hazard in Iran, which annually affects the environment and human lives. On March 25, 2019 in Shiraz-Iran, following a heavy rainfall, the occurrence of a flash flood caused an extensive number of deaths, injuries, and vehicle demolitions in a short time. Evidence suggests that man-made causes of the incident, including unsustainable urban development and lack of early warning services, have played a more influential role compared with its natural causes. This study has attempted to substantiate that understanding disaster risks, as the first priority of Sendai Framework for Disaster Risk Reduction (SFDRR) 2015-2030, directly impacts the decisions and actions of policymakers, local authorities, and the public. To provide more safety, mitigation, and disaster risk reduction, attention should primarily be paid on making a cultural paradigm shift through providing sufficient training in developing appropriate disaster risk perception in the community at large.

Asian Social Science, Jul 24, 2014

One of the newest and most effective strategies to empower staff is building the infrastructure a... more One of the newest and most effective strategies to empower staff is building the infrastructure and platform for strengthening organizational learning. This study has conducted about the relationship between organizational learning and staff empowerment. This correlational study was conducted among the staff of a Children's Hospital affiliated to Tehran University of Medical Sciences, Iran in 2012. Numbers of 145 staff in this hospital has selected and enrolled by simple random sampling. The data collection tools were tow questionnaires for organizational learning and staff empowerment which approved their validities and reliabilities. Finally, collected data were analyzed by Spearman correlation test. Among the dimensions of organizational learning, knowledge transfer and integration with 3.47 and system perspective with 3.16 obtained highest and lowest scores respectively. Generally, overall rating of organizational learning and the staff empowerment variables were determined 3.25±0.71 and 3.74±0.59 respectively. Between the four dimensions of organizational learning (managerial commitment, system perspective, openness and experimentation, knowledge transfer and integration) and staff empowerment, was observed a significant correlation. According to the findings, the current situation of organizational learning and staff empowerment in studied hospital is relatively acceptable. It recommended that hospital systems can improve staff empowerment by developing organizational learning environment, creating experience and knowledge exchange platforms, using material incentives and specially focusing on the intrinsic motivation.

2019 International Power System Conference (PSC)

SSRN Electronic Journal

Introduction: Under the influence of existing microorganisms in soil, the landfilled municipal so... more Introduction: Under the influence of existing microorganisms in soil, the landfilled municipal solid waste, would produce and release high quantities of carbon dioxide, methane and non-methane organic compounds into the atmosphere in anaerobic conditions. The aim of this study was to estimate the amount volume of produced gasses in the landfill located at city of Jahrom. Materials and methods: To conduct this research, the primary data including waste composition, waste density, waste production capitation, the weight of the annual produced waste were collected using experimentations and calculations. These data were then used in LandGEM for the purpose of landfill gases volume estimation. The Screen view was then used for modeling of pollutants dispersion into atmosphere in 15 km radius around the landfill. Results: Studies suggest that the waste generation in city of Jahrom is 313.35 g/person.d. The climax of carbon dioxide and methane production in this landfill in 2028 was equal to 10570000 m 3 /year. Estimation shows that by recycling the obtained methane in this landfill, it is possible to generate 8375 MW of energy by 2016. It is also indicated that the concentration of produced pollutants in the landfill is calculable in 15 km radius. Conclusions: The obtained results from this study could be used to determine the role of Iran in global emission of greenhouse gasses and be considered for the Iranian energy production planning's.

Journal of Clinical Nursing and Midwifery, Oct 10, 2013

Background and aims: The need for innovative nurses in intensive care wards is felt to provide ex... more Background and aims: The need for innovative nurses in intensive care wards is felt to provide exclusive complex care to very ill patients. The present study aimed to determine the level of innovation in critical care nurses and the individual and organizational factors associated with it. Methods: In this descriptive-analytical study, 205 subjects were selected by consensus included critical care nurses of educational-therapeutic centers in Rasht in 2013. Data collection instrument included Kirton Adaption-Innovation Inventory with questions related to individual and organizational characteristics. Questionnaire scoring was based on five-point Likert scale Results: Mean score of "innovations" score in nurses was 120.88±15.15 and 95.24% of nurses were innovative. Also, among personal factors, the level of innovation was significantly related to variables such as gender (p=0.012), educational level (p=0.039) and age (p=0.037), and in organizational factors, management experience (p=0.006), having education course on creativity and innovation (p=0.014) and type of critical care ward (p≤0.001) employed were significantly correlated. Conclusion: According to large proportions of innovative nurses, healthcare managers and policymakers must create a receptive, trusting and appropriate atmosphere to facilitate the implementation of original and creative ideas of nurses to solve some of health care system problems.

IET Electric Power Applications, 2020