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Search Results: 1 - 10 of 505403 matches for " Ali Reza HE?DARN?A "
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Theory-Based Education and Postural Ergonomic Behaviours of Computer Operators: A Randomized Controlled Trial From Iran
Sedigheh Sadat TAVAF?AN,Isa 1- Mohammadi ZE?D?,Ali Reza HEDARNA
Türkiye Fiziksel Tip ve Rehabilitasyon Dergisi , 2012,
Abstract: Objective: This study evaluated the effects of a designed stage-matched educational program based on stage of change model on knowledge, attitude, intention and behaviours of Iranian computer users. Materials and Methods: Of four computer stations affiliated to Qazvin University of Medical Sciences, two sites were randomly selected as intervention and control ones, each 75 eligible computer users were randomly selected and if satisfied, they were entered into the study. The participants working in intervention site received the stage-matched intervention. Questionnaires of stages of change, ergo-knowledge/attitude, intent towards ergonomic and postural behaviour, Rapid Upper Limp Assessment (RULA), Visual Analogue Scale (VAS), and the Nordic questionnaire were completed at baseline and 3-month follow up. Data were entered to SPSS and analyzed through descriptive and analytical statistics. Results: A total of 150 participants with a mean age of 31.6 years (SD=7.0) took part in the study of which 67% (n=101) were female. The intervention group, compared to control group, showed significant improvements in stages of change (p<0.001), ergo-knowledge (p<0.001), attitude (p< 0.05), intent (p<0.001), and perceived behaviours control (p<0.001). Conclusion: This study revealed beneficial impact of the educational program in occupational setting. This designed stage-matched educational program could be practiced by computer workstations. Turk J Phys Med Re-hab 2012;58:312-8.
SYNTHESIS, FORMULATION AND QUALITY CONTROL OF MEBROFENIN (BRIDA) AS A 99mTc-KIT FOR CHOLE SCINTIGRAPHY
Ali. A. Yaraghchi,Reza. Najafi
Iranian Journal of Nuclear Medicine , 1995,
Abstract: This article will review the essential chemical structure of IDA derivatives and their biokinetic characteristics as the hepatobiliary agents. The article also presents the procedures of Synthesis, formulation and Quality control of mebrofenin (BRIDA) as a 99mTc-Radiopharmaceuticai kit which is produced in Radioisotope Division of N.R.C. 99mTc-BRiDA has extremely low renal excretion and hence greater hepatic specificity. In addition, the BRIDA is much more resistant to Markedly elevated levels of bilirubin rather than the other IDA'S analogs.
Interacting Adaptive Processes with Different Timescales Underlie Short-Term Motor Learning
Maurice A. Smith,Ali Ghazizadeh,Reza Shadmehr
PLOS Biology , 2012, DOI: 10.1371/journal.pbio.0040179
Abstract: Multiple processes may contribute to motor skill acquisition, but it is thought that many of these processes require sleep or the passage of long periods of time ranging from several hours to many days or weeks. Here we demonstrate that within a timescale of minutes, two distinct fast-acting processes drive motor adaptation. One process responds weakly to error but retains information well, whereas the other responds strongly but has poor retention. This two-state learning system makes the surprising prediction of spontaneous recovery (or adaptation rebound) if error feedback is clamped at zero following an adaptation-extinction training episode. We used a novel paradigm to experimentally confirm this prediction in human motor learning of reaching, and we show that the interaction between the learning processes in this simple two-state system provides a unifying explanation for several different, apparently unrelated, phenomena in motor adaptation including savings, anterograde interference, spontaneous recovery, and rapid unlearning. Our results suggest that motor adaptation depends on at least two distinct neural systems that have different sensitivity to error and retain information at different rates.
Study on the interaction between morin-bi(III) complex and DNA with the use of methylene blue dye as a fluorophor probe
Ensafi, Ali A.;Hajian, Reza;Ebrahimi, Sara;
Journal of the Brazilian Chemical Society , 2009, DOI: 10.1590/S0103-50532009000200011
Abstract: based on our investigation, although both morin-bi(iii) complex and morin can bind to dna, the nature of the binding was found to be different for each of them. in the presence and absence of the dna, the morin-bi(iii) complex shows different spectral characteristics which agree with those observed for other intercalators. in this work, the interaction of morin-bi(iii) complex with calf thymus dna was investigated with the use of methylene blue (mb) dye as a spectral probe and application of uv-vis spectrophotometry, fluorescence spectroscopy and cyclic voltammetry. the 2:1 morin-bi(iii) complex ratio was calculated by uv-vis spectroscopy (mole ratio method). the fluorescence signal of bi(iii)-morin complex is increased with dna addition whereas the fluorescence signal of morin is decreased with dna addition. the fluorescence signal of the dna-complex is quenched by addition of mb which confirms the displacement of the complex with mb. cyclic voltammetry studies confirm the intercalation reaction. the results showed that only morin-bi(iii) complex can intercalate into the double helix of the dna. the apparent binding constant of morin-bi(iii) complex with dna is found to be 2.8 × 104 l mol-1, while morin binds in a non-intercalation mode.
Interacting Adaptive Processes with Different Timescales Underlie Short-Term Motor Learning
Maurice A Smith ,Ali Ghazizadeh,Reza Shadmehr
PLOS Biology , 2006, DOI: 10.1371/journal.pbio.0040179
Abstract: Multiple processes may contribute to motor skill acquisition, but it is thought that many of these processes require sleep or the passage of long periods of time ranging from several hours to many days or weeks. Here we demonstrate that within a timescale of minutes, two distinct fast-acting processes drive motor adaptation. One process responds weakly to error but retains information well, whereas the other responds strongly but has poor retention. This two-state learning system makes the surprising prediction of spontaneous recovery (or adaptation rebound) if error feedback is clamped at zero following an adaptation-extinction training episode. We used a novel paradigm to experimentally confirm this prediction in human motor learning of reaching, and we show that the interaction between the learning processes in this simple two-state system provides a unifying explanation for several different, apparently unrelated, phenomena in motor adaptation including savings, anterograde interference, spontaneous recovery, and rapid unlearning. Our results suggest that motor adaptation depends on at least two distinct neural systems that have different sensitivity to error and retain information at different rates.
Association between Serum Glutathione Peroxidases and Superoxide Dismutases mRNA Level with Coronary Artery Disease  [PDF]
Ali Reza Abaspour, Mohammad Taghikhani, Mohamad Reza Parizade, Mohsen Moohebati, Fahime Ghafoori, Mehraneh Mehramiz, Maryam Tayefi, Amir Avan, Marzeye Ghalandari, Gordon A. A. Ferns, Majid Ghayour-Mobarhan
Health (Health) , 2017, DOI: 10.4236/health.2017.92017
Abstract: Background: Oxidative stress plays a crucial role in the pathogenesis and progression of many diseases, including cardiovascular disease (CVD) and diabetes mellitus. Oxidative stress results from an imbalance between free radical formation and the protective antioxidant mechanisms. The latter mechanisms include superoxide dismutases (SODs) and glutathione peroxidases (GPx) that scavenge excessive ROS and protect cells against excess ROS production. The aim of current study was to determine the serum levels of SOD and serum GPx mRNA as well as the serum prooxidant-antioxidant balance in CVD patients. Method: A total of 103 subjects were recruited, with ≥50% stenosis (Angio+) or <50% stenosis of one or more coronary arteries by angiography (Angio). The expression levels of SOD and GPx in serum were measured using real time PCR. Biochemical-analyses (e.g., triglycerides; high-density lipo-protein cholesterol; low-density lipoprotein cholesterol; fasting-blood-glucose) were determined in all the subjects. Associations of SOD and GPx levels with biochemical and anthropometric characteristics were assessed together with evaluation of the serum pro-oxidant-antioxidant balance (PAB). Results: CVD subjects had a significantly higher level of fasting blood glucose (FBG), TC, LDL-C, TG and hs-CRP levels, as compared to control subjects. The level of serum PAB was significantly higher in the CVD group, 117.92 ± 35.51 and 110.65 ± 27.65 μg/dl in the angio and angio+ groups, respectively compared to the control group (54.26 + 23.25). Additionally we observed that the SOD-3 level was higher in angio+ group versus control subjects. Conclusion: We have found that patients with CVD had a significantly higher prooxidant-antioxidant and SOD-3 levels. Further studies in larger multi-center setting are warranted to explore the value of emerging biomarker in CVD patients.
3D Analysis and Investigation of Traffic Noise Impact from Hemmat Highway Located in Tehran on Buildings and Surrounding Areas  [PDF]
Hamid Reza Ranjbar, Ali Reza Gharagozlou, Ali Reza Vafaei Nejad
Journal of Geographic Information System (JGIS) , 2012, DOI: 10.4236/jgis.2012.44037
Abstract: This study analyzes and investigates the impact of traffic noise on high rise buildings and surrounding areas by the side of Hemmat Highway that links west of Tehran to the east. In this study, a 3D traffic noise simulation model is applied on a GIS system. Visualized noise levels are formulated by the proposed model for noise mapping on all surfaces of the buildings and surrounding ground in a 3D platform. The investigation shows that there is a high traffic noise impact on the foreground and front facades of buildings, rendering these areas unsuitable for residential purposes. The ground area by the sides of buildings and the building side panels receive a lower noise impact. Most of these areas are still not acceptable for residential and even commercial use, only the back yards and back panels, have the lowest traffic noise impact. It also shows that the building height is not an effective factor for reducing motorway noise on the upper part of the building. Finally, construction cantilever barriers with a height of seven meters, close to the outer edge of the highway was presented as an effective way to reduce noise within the allowable range of noise pollution for commercial and residential purposes.
Low-Cost Strategies for Development of Molecular Markers Linked to Agronomic Traits in Prunus  [PDF]
Juan A. Salazar, Mousa Rasouli, Reza Fatahi Moghaddam, Zabihollah Zamani, Ali Imani, Pedro Martínez-Gómez
Agricultural Sciences (AS) , 2014, DOI: 10.4236/as.2014.55044
Abstract:

Evaluation of agronomic traits in Prunus breeding programs is a tedious process because of the long juvenile period of trees, the influence of juvenility and the existence of climatic factors affecting the expression of the trait. For these reasons, marker-assisted selection (MAS) strategies are particularly useful in these cases. The objective of this work is the analysis of alternative low- cost strategies for development of molecular markers linked to agronomic traits in Prunus including the application of modified Bulked segregant analysis (BSA) using Simple sequence repeat (SSRs) markers and the application of Random amplified polymorphism microsatellite (RAMP) markers. First BSA results showed that two SSR loci were found to be tightly linked to flowering time in almond. On the other hand, RAMP analysis has been demonstrated to be a potentially valuable molecular marker for the study of genetic relationships in Prunus. Results showed the dominant nature of these markers with a great abundance and transferability although with a reduced polymorphism. In addition, RAMP application in F1 progenies showed its suitability for molecular characterization and mapping, and later Quantitative trait loci (QTL) or BSA analysis.

The Necessity of Using Cloud Computing in Monitoring Metropolitan Performance
-Case Study: Tehran Metropolitan Urban Observatory
 [PDF]

Ali Madad, Ali Reza Gharagozlou, Ali Reza Vafaei Nejad
Journal of Geographic Information System (JGIS) , 2013, DOI: 10.4236/jgis.2013.56049
Abstract:

Due to the metropolitan area of immense diversity and breadth of their construction activities, the performance of activities at districts level, cannot be precisely evaluated. Therefore, generally, it monitors only the indices which are defined for those functions. Furthermore, district-based development policy, and decentralization of governance, necessitate more local autonomy, which requires closer monitors of districts for being sure of its movements in the frame of urban developing plans. The advancement of technology has created the expectation that we can monitor all details of the metropolitan administrative processes and involve them in decision support systems for urban management. In this study, a web based SDSS prototype has been implemented to monitor the Tehran development plans progress at districts level. This interactive system presents a map of Tehran which indicates the realization of each component of the city master plan in different parts of town. The design of system lets all districts produce and support their own reporting maps, and it presents them in their dedicated place of city map by snapping all districts reports, when a city report arises. Also it elaborates the problem of implementing and proposes cloud computing facilities as a solution.

Spatial Analysis Approach in Revealing the Global Sinks of Atmosphere Carbon Dioxide through “Leave One Out” Method  [PDF]
Ali Madad, Mossayeb Jamshid, Ali Reza Gharagozlou, Ali Reza Vafaei Nejad, Ali Javidane, Hamid Reza Ranjbar
Journal of Geographic Information System (JGIS) , 2014, DOI: 10.4236/jgis.2014.64026
Abstract:

Global warming and climate change are the most important ecological issues of our time. The most well-known factor in this phenomenon is the redundancy of carbon dioxide in the atmosphere. Over the past 50 years the amount of residual CO2 in the atmosphere has risen from 40% to 45%. Reducing CO2 redundancy requires precise knowledge of the gas sources and sinks throughout the atmosphere. Despite having a leading role in residual gas levels of atmosphere, the diagnosis and types of changes of absorbing carbon dioxide are very much in doubt. Atmospheric measurements of CO2 concentrations are highly precise and provide a reliable measure of increase of CO2 in the atmosphere every year but they do not lead to the location of sources and sinks. Studies about understanding CO2 cycles began mainly around 1990 and most of these studies have been focused on non-spatial analysis. By ignoring the spatial effects, an important property such as closeness (adjacent) has been disregarded. The emission sources of gas are stronger than their sink sources i.e., whenever a sink is adjacent to a strong

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