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Seroepidemiology of toxoplasmosis in pregnant women referring to health centers in the city of Hamadan in 1391
Amirhossein Maghsood,Mohammad Fallah,Hemen Moradi-Sardareh,Hemen Shanazi
Pajouhan Scientific Journal , 2013,
Abstract: Introduction: Toxoplasmosis is a most common parasitic infection in humans and animals, it has two acute and chronic phases that related to IgM and IgG, respectively. This prevalence is affected by different variables, so determination of the prevalence of serum IgG and IgM antibodies against Toxoplasma in terms of these variables like age, occupation and education level is so important.Material and Methods: This descriptive-analytic cross sectional study was done on 350 pregnant women referred to health - Therapeutic centers of Hamadan city. After obtaining informed consent from volunteers, their serum samples were tested by IgG ELISA and IgM ELISA methods and their associations with age, occupation and education level variables were measured.Results: From total of 350 pregnant women, 105 cases (30%) had anti-Toxoplasma IgG, and 3 cases (2.9%) had anti-Toxoplasma IgM. Antibody titer of IgM with variable age, occupation and education level was not significant, but antibody titer of IgG with these variables was significant.Conclusion: Given the significant association between the disease and age, occupation and education level in pregnant women, it should be provide the necessary training and knowledge about preventiion and avoid of being infected with toxoplasmosis infection.
Frequency Hopping Spread Spectrum Security Improvement with Encrypted Spreading Codes in a Partial Band Noise Jamming Environment  [PDF]
Amirhossein Ebrahimzadeh, Abolfazl Falahati
Journal of Information Security (JIS) , 2013, DOI: 10.4236/jis.2013.41001
Abstract:

Frequency Hopping Spread Spectrum (FHSS) system is often deployed to protect wireless communication from jamming or to preclude undesired reception of the signal. Such themes can only be achieved if the jammer or undesired receiver does not have the knowledge of the spreading code. For this reason, unencrypted M-sequences are a deficient choice for the spreading code when a high level of security is required. The primary objective of this paper is to analyze vulnerability of linear feedback shift register (LFSRs) codes. Then, a new method based on encryption algorithm applied over spreading codes, named hidden frequency hopping is proposed to improve the security of FHSS. The proposed encryption security algorithm is highly reliable, and can be applied to all existing data communication systems based on spread spectrum techniques. Since the multi-user detection is an inherent characteristic for FHSS, the multi-user interference must be studied carefully. Hence, a new method called optimum pair “key-input” selection is proposed which reduces interference below the desired constant threshold.

Infants Exposure to Aflatoxin M1 from Mothers Breast Milk in Iran
SA Ghiasain,AH Maghsood
Iranian Journal of Public Health , 2012,
Abstract: Background: The occurrence of aflatoxin M1 (AFM1) in milk, especially breast milk, is a valuable biomarker for ex-posure determination to aflatoxin B1 (AFB1). In the present study, the risk of exposure to AFM1 in infants fed breast milk was investigated. Methods: An enzyme-linked immunosorbent assay (ELISA) was used for the analysis of AFM1 in breast milk samples from 132 lactating mothers referred to four urban Mothers and Babies Care Unit of Hamadan, western Iran. Results: AFM1 was detected in eight samples (6.06%) at mean concentration of 9.45 ng/L. The minimum and maxi-mum of concentration was 7.1 to 10.8 ng/L, respectively. Although the concentration of AFM1 in none of the samples was higher than the maximum tolerance limit accepted by USA and European Union (25 ng/kg) however, 25% had a level of AFM1 above the allowable level of Australia and Switzerland legal limit (10 ng/L). Conclusions: Lactating mothers and infants in western parts of Iran could be at risk for AFB1 and AFM1 exposure, respectively. Considering all this information, the investigation of AFM1 in lactating mothers as a biomarker for post-natal exposure of infants to this carcinogen deserves further studies in various seasons and different parts of Iran
The Need for Balanced Health Policies to Avoid Path Dependent Medicine
Amirhossein Takian
International Journal of Health Policy and Management , 2013,
Abstract:
Potential efficacy of ginger as a natural supplement for nonalcoholic fatty liver disease
Amirhossein Sahebkar
World Journal of Gastroenterology , 2011,
Abstract: Nonalcoholic fatty liver disease (NAFLD) is one of the most common liver diseases and its prevalence is likely to reach epidemic proportions. According to the “two-stage hypothesis” proposed for the pathophysiology of NAFLD, insulin resistance, oxidative stress and pro-inflammatory cytokines are among the key promoters of the disease. Here, ginger has been hypothesized to prevent NAFLD or blunt its progression via several mechanisms, such as sensitizing insulin effects, activating peroxisome proliferator-activated receptor γ which induces adiponectin and down-regulates pro-inflammatory cytokines, changing the balance between adiponectin and tumor necrosis factor-α in favor of adiponectin, promoting considerable antioxidant effects and antidyslipidemic properties, and reducing hepatic triglyceride content which can prevent steatosis. The aforementioned mechanisms imply that ginger possesses interesting potentials for serving as a natural supplement for the prevention and treatment of NAFLD. Therefore, conducting trials to explore its benefits in clinical practice is greatly recommended.
Mechanical Properties of PP/Jute and Glass Fibers Composites: The Statistical Investigation
Amirhossein Esfandiari
Journal of Applied Sciences , 2007,
Abstract: A systematic and statistical approach to evaluate and predict the properties of random discontinuous natural fiber reinforced composites was studied. Different composites based on polypropylene and reinforced with natural fibers (flax and glass) have been made and their mechanical properties are measured together with the distribution of the fiber size and the fiber diameter. The values obtained were related to the theoretical predictions, using a combination of the Griffith theory for the effective properties of the natural fibers and the Halpin-Tsai equation for the elastic modulus of the composites. The relationships between experimental results and theoretical predictions are statistically analyzed using a probability density function estimation approach based on neural networks. The results show a more accurate expected value with respect to the traditional statistical function estimation approach.
The Role of Human Resource Management in Iranian SMEs; in the Case of Medical Imaging Centers
Amirhossein Akhavan
Iranian Journal of Radiology , 2010,
Abstract: Human Resource Management (HRM) faces difficulties in small businesses which derive from the small size and absence of adequate financial resources. Many authors have investigated the changed version of HRM in small enterprises which is some deal different with HRM in large enterprises. But in Iran researches are not interested in investigating human resource management in the field of small businesses and this encouraged me to perform this research. At first, this study has reviewed HRM policies and practices in small and medium enterprises (SMEs) in the world. Then Iranian medical imaging centers have been selected as knowledge SMEs and some related managerial information has been collected from them by observation and interview. The obtained findings are about the role that HRM plays in today Iranian SMEs in the case of medical imaging centers. In this chapter the type of Human Resource Management which is accomplished in medical imaging enterprises in Iran is discovered and you can find the mistakes performed by their managers. These findings are analyzed based on literatures. In the conclusion part, some differences between western and Iranian models are proved and the study concludes that most of the owner managers in medical imaging centers in Iran could not execute HRM practices, even if they knew them or not. At last, some key points are presented as final recommendations to Iranian medical imaging SMEs in order to help them to improve their efficiency in the future.
Measuring Systemic Risk: Robust Ranking Techniques Approach
Amirhossein Sadoghi
Quantitative Finance , 2015,
Abstract: The recent economic crisis has raised a wide awareness that the financial system should be considered as a complex network with financial institutions and financial dependencies respectively as nodes and links between these nodes. Systemic risk is defined as the risk of default of a large portion of financial exposures among institution in the network. Indeed, the structure of this network is an important element to measure systemic risk and there is no widely accepted methodology to determine the systemically important nodes in a large financial network. In this research, we introduce a metric for systemic risk measurement with taking into account both common idiosyncratic shocks as well as contagion through counterparty exposures. Our focus is on application of eigenvalue problems, as a robust approach to the ranking techniques, to measure systemic risk. Recently, the efficient algorithm has been developed for robust eigenvector problem to reduce to a nonsmooth convex optimization problem. We applied this technique and studied the performance and convergence behavior of the algorithm with different structure of the financial network.
A Role of Digital Media on Discussing about the Diplomacy in the World  [PDF]
Amirhossein Asadi
Open Journal of Political Science (OJPS) , 2017, DOI: 10.4236/ojps.2017.72021
Abstract: It is very important to understand the nature of digital media and its various categories and the position of this media and modern communication technology in the present social and political interactions. Explaining different kinds of discourses and different principles, theories, and conceptual models of the society along with the role of digital media is one of the most effective tools of information and culture in introducing the political system of Islamic Republic of Iran which is a religious democracy. A religious democracy is one of the aims of this study. In this study, a role of digital media in discourses of Islamic revolution was identified with a descriptive method. Also, there is no boundary in the virtual space. Therefore, relevant articles and studies were published about digital media and virtual diplomacy during the years of 2009 to 2013. Also, some of the relevant scientific books were studied. Digital diplomacy is a new tool in the world, to change attitudes and influence the thinking and beliefs of people today without invasion and war. In this context, digital media, because of the exceptional features like power to influence public opinion, international and cross-border charm and diversity, have great influence on the shaping of social changes and changing discourses. Hence development programs of making discourse using digital media, civil society and the international community can contribute to the development of the religious discourse of democracy. In this article, digital media and their effectiveness and usage in an introductory and discussion process were posed. Since people’s ideas are influenced a lot with digital media, digital media have a lot of effects on forming the social developments and discourse changes. Therefore, developing discourse programs with the use of digital media in internal and international communities can be effective in the development of Islamic revolution discourse.
Pelvic Bone Hydatidosis
Hamid Reza Arti,Maghsood Mohammadzade
Jundishapur Journal of Microbiology , 2012,
Abstract: : Hydatid disease is caused by Echinococcus spp. especially Echinococcus granulosus that is the most common cause of hydatid disease in humans. This disease occurs either through direct contact with infected dogs or indirectly from the ingestion of contaminated water or food with eggs of worms. The most common site in human is the liver (59-75%), followed in frequency by lung (27%), kidney (3%) and bone (1-4%). The authors report a case of the pelvic bone hydatidosis in a 27-years old patient, appearing with pain and a mass in the pelvic region.
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