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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Optoelectronical Nanostructures
- نوع مقاله: Journal Article
- کلمات کلیدی: Magnetic Sensor,Giant Magneto Resistance,Resistor Network Model
- چکیده:
- چکیده انگلیسی: Abstract : The variation of the electrical resistivity of a material in the external
magnetic field is known as magneto resistance. This phenomenon has been attracted
both theoretical and experimental researchers in miniaturization of magneto meters in
the recent years. In this paper, the magneto resistance of an inhomogeneous two
dimensional conductor with ladder geometry is simulated by using a two dimensional
resistor network model. Maxwell's equations have been solved for a point of lattice
considered as disk and then, its magneto resistance was calculated using a network
model. The results illustrate that the magneto resistance depends on the specific
resistance ratios and their locations. Moreover, the results demonstrate when
inhomogeneity is added properly, the magneto resistance will be increased, otherwise it
will be reduced. The results also show that for special values of physical parameters
especially the inhomogeneity, the magneto resistance is diverged at special magnetic
field.- انتشار مقاله: 03-06-1398
- نویسندگان: Zeynab Bagheri,Mehdi Hosseini,Omid Reza Daneshmandi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Background: Given the potential role of the 5-hydroxytryptamine-3 receptor in the pathogenesis of schizophrenia, this study was performed to determine whether ondansetron plus risperidone could reduce the negative and depressive symptoms in patients with treatment-resistant schizophrenia.Methods: In a double-blinded, placebo-controlled, randomized trial (IRCT registration # 201112125280N7), in 2012–2013 in Mashhad, Iran, 38 patients with treatment-resistant schizophrenia received risperidone either combined with a fixed dose (4–8 mg/d) of ondansetron (n=18) or with a placebo (n=20) for 12 weeks. The patients were evaluated using the Positive and Negative Syndrome Scale (PANSS), Wechsler’s Adult Intelligence Scale-Revised (WAIS-R), and Hamilton’s Rating Scale for Depression (HRSD) at baseline and 12 weeks later. Changes in the inventories were used to evaluate the efficacy of the treatment. The t test, Chi-square test, and SPSS (version 16) were used to analyze the data. The statistical significance was set at P<0.05. Results: Ondansetron plus risperidone was associated with a significantly larger improvement in the PANSS overall scale and subscales for negative symptoms and cognition than was risperidone plus placebo (P<0.001). The WAIS-R scale results indicated significant differences between the 2 groups before and after administrating the medicine and the placebo. The administration of ondansetron significantly improved visual memory based on the subtests of the WAIS (P<0.05). Ondansetron had no positive effects on depressive symptoms (effect size=0.13). Conclusion: This study confirmed that ondansetron, as an adjunct treatment, reduces negative symptoms in patients with schizophrenia and can be used as a potential adjunctive strategy particularly for negative symptoms and cognitive impairments. Trial Registration Number: IRCT201112125280N7
- انتشار مقاله: 14-06-1394
- نویسندگان: Roya Samadi,Reza Daneshmand,Shervin Assari,Ali Akhoundpour Manteghi
- مشاهده
- جایگاه : پژوهشی
- مجله: Addiction and Health
- نوع مقاله: Journal Article
- کلمات کلیدی: drugs,Iran,Harm reduction,treatment,Human Immunodeficiency Virus,Women
- چکیده:
- چکیده انگلیسی: Background: Iranian female methadone patients are at risk of human immunodeficiency virus (HIV) due to involvement in high-risk sexual behaviours and/or needle sharing. The present study aimed to explore the perceived educational needs related to HIV among a group of Iranian female methadone patients. Methods:The research design was qualitative and the participants were sampled purposively.
Semi-structured interviews were conducted with 34 women and 19 clinicians in Sari, Mashhad, and Tehran, Iran. Then, qualitative content analysis was implemented. Findings: The emergence of three major themes and six minor themes was revealed. Women expressed a need to increase their knowledge including women-specific pathophysiology and disease progression and the modes of the virus transmission and prevention. Women also expressed a need to enhance their knowledge and skills related to the physical management of the virus including self-care and reproductive health. Other themes included perceived psychosocial needs including removing stigma and access to resources in the community. Conclusion: Women reported a wide range of educational needs from basic knowledge to advanced skills. The findings can be used in designing women-specific educational programs related to HIV in Iran. Larger studies are suggested with gender-mixed samples in the Persian context- انتشار مقاله: 23-02-1398
- نویسندگان: Mehran Zarghami,Maedeh Bagheri,Hamed Bahari,Khatereh Tufani,Alireza Mahjoub,Reza Daneshmand,Zahra Alammehrjerdi,Raheleh Mohammadian,Omid Massah
- مشاهده