z. mohebbi

While the conventional parallel-hole collimators are widely used in myocardial perfusion imaging (MPI) with SPECT, they are suboptimal in balancing the existing sensitivity-resolution compromise. Therefore, multi-pinhole collimation has been proposed to address the problem. In the present study, a channel multi-pinhole collimated SPECT scanner is modeled and then simulated using the GATE Monte Carlo simulation. The multi-pinhole collimator comprises eight apertures. The material, diameter, and height of the apertures were assumed to be varying. A comparison with conventional single-pinhole was also conducted. The results show that increasing the hole diameter leads to degraded spatial resolution for the multi-pinhole collimator. Compared to the single-pinhole, the multi-pinhole collimators suffer from projection overlapping and thus deteriorated spatial resolution. The findings confirm that the channel multi-pinhole collimators outperform the single-pinhole apertures by providing much higher sensitivity at the expense of slightly lower spatial resolution and therefore would be the collimator of choice for MPI with SPECT.

 The general health of nurses is always at risk due to difficult working conditions. Although exercise interventions, especially aerobic exercise, may improve the general health of nurses, no study has been found in this area so far. Therefore, the present study aimed to investigate the impact of aerobic exercise on the general health of nurses.

 This interventional study was carried out on 60 female nurses working in hospitals affiliated with Shahrekord University of Medical Sciences in 2017. Nurses were selected by the available sampling method and assigned to control and intervention groups by block randomization. Data were selected by General health and demographic questionnaires. The intervention group practiced three 1-hour sessions per week for eight weeks in the gym according to the exercise program, while the control group did not receive any intervention. The general health questionnaire was assessed in two groups before, immediately, and two months after the intervention. Data were analyzed using SPSS 19 software through T, chi-square tests, and repeated measures analysis of variance.

The mean±SD age of participants was 33.0±2.7 years. The effect of the group was significant (p=0.001) and showed an improvement in the general health of nurses participating in the intervention group after the intervention compared to the control group (p=0.02). The effect of time was also significant because the mean general health of participants changed significantly over time in both control and intervention groups (p<0.001). However, time-group interaction was not significant (p>0.05).

 Aerobic exercise in nurses improves general health in the initial period after the intervention.

Asthma is one of the common, chronic respiratory diseases which psychological factors play an important role in it and comorbidities of several psychological disorders such as anxiety, depression, and panic attacks are common in asthmatic patients. The aim of this study was to determine the effect of hypnosis on pulmonary function and severity of the disease in asthmatic patients.

This randomized clinical trial study, was carried out on 64 asthmatic patients, who referred to the clinic of Shahid Mofattah in Yasuj, Iran in 2010. The subjects were selected by purposeful sampling method, and randomly assigned into the tow group of the intervention (subjects were treated by solo hypnosis in a 90-minute session and conventional treatments) and control group (subjects were treated by conventional treatments, in addition, providing an explanation about requirement care point for improvement of asthma in 15 minutes) by use of balanced block randomization. In addition to completing demographic information at the beginning of the study, determination of pulmonary function and asthma severity were conducted respectively through measurement of FEV1 and NAEPP classification (EPR-3) at the starting point of the study and one month after the completion of the research intervention. Data were analyzed using SPSS 21 software, through independent sample t-test, paired sample t-test, Chi-square test, and marginal homogeneity test.

one month after completing the research intervention, the FEV1 in the intervention group increased than the control group and the severity of asthma in the intervention group decreased than the control group.

Hypnosis as an adjuvant treatment is effective in the improvement of pulmonary function and reducing the disease severity in asthmatic patients.

Commonly libraries and information centers use LibQual to measure their quality of services. Although analysis of Libqual done with classical statistics، it is possible to analyze it through Artificial Neural Network with lower error rate. This research try to introduce an Artificial Neural Network that is able to predict s ervice quality of university library.

In this applied cross-sectional study، all of Shiraz university of medical science students were assessed. LibQual questionnaire was the instrument of data collection and MATLAB software was being used to analyze data. In addition an algorithm was written to automatic selection of the best network architecture based on lower error rate and higher adaptation rate.

for 5 categories of input data and with running of the written algorithm، 5 ANN was created and their matching ratio is 0. 77059، 0. 6828، 0. 81089، 0. 79161 and 0. 83273 respectively.

By comparing the ANNs، it was found that ANN with 20 hidden layer، %80 training data، %16. 667 testing data and %3. 3333 validation data that be fed with fifth input data، is the most appropriate ANN in quality evaluation of university libraries.