s. sabzevari

Islanding detection is essential for reliable and safe operation of systems with distributed generations (DG). In systems with multiple DGs, the interaction between DGs can make the islanding detection process more challenging. To address this concern, this paper proposes a two-stage islanding detection method for power systems equipped with multiple-DGs through estimation of high frequency impedance (Zf) and determination of the total harmonic distortion (THD). The impedances of the DGs are estimated at distinct frequencies to avoid interval overlaps. The concept of different frequency bands makes the proposed method applicable to multiple DG systems. To evaluate the effectiveness of the proposed method, a test system with multiple DGs is simulated through several case studies in PSCAD/EMTDC. The simulation results demonstrate the accuracy of the proposed islanding detection method in both single and multi-DG systems. It is also shown that the proposed method remains robust under different operating conditions and events.

Cardiovascular diseases are among the leading causes of mortality worldwide. Given the importance of education in promoting behaviors to prevent cardiovascular diseases, this study aims to investigate the effect of training intervention based on the health belief model on the diseases preventive behaviors in health workers of Rafsanjan.

This semi-experimental study was conducted on 79 health workers of Rafsanjan city in 2019. The samples were selected purposively and divided into intervention and control groups randomly. Specific questionnaires of demographic information and health belief model were completed in two sessions before and after the intervention. For the intervention group, four 45-minute training sessions were provided, while no training intervention was implemented for the control group. The collected data were analyzed using independent t-test, fisher's exact test, and chi-square (χ2) tests of the SPSS Version 18 software at a significance level of 0.05.

The results showed that the mean scores of awareness (p>0.004), perceived sensitivity (p>0.001), perceived severity (p=0.002), perceived benefits (p>0.001), self-efficiency (p>0.001), and preventive behaviors from cardiovascular diseases (p>0.001) increased significantly in the intervention group compared to the control group.

This study showed that health belief model-based training could effectively improve the preventive behaviors from cardiovascular diseases.

Asthma is a common chronic illness in children that effects patients` and their families` quality of life. The aim of this study was to determine the effect of family-centered Empowerment Model on quality of life of school aged children with asthma.

This study was a quasi-experimental research on 172 children between 6 and12 years old، whom were referred to asthma clinic in Kerman Afzalipoor Hospital. For this purpose، in control and experimental group were selected based on convenience sampling. Data was gathered using «Pediatric Asthma Quality of Life Questionnaire» and was approved with content validity and reliability (α=0. 80). The model has four stages (increase knowledge، self-empowerment، self-steam and evaluation) and was used in discussions، demonstrations and cooperative leanings with experimental group. The participants completed questionnaire before and after intervention. For data analysis SPSS/16 was used.

Results showed that before intervention there was not any significant difference between two groups in quality of life scores. However، after intervention، quality of life scores in experimental and between two groups was different (p<0. 05).

Findings showed that the designed model has improved quality of life in children (symptoms، activity limitation، and emotional function). Hence، usage of this model is also suggested for other chronic illness.

Many factors influence patients` sleep and recognizing them can help care givers to provide good care. The aim of this study was to compare view of physicians, nurses and patients in regard to factors relating to sleep disorders in patients.

This descriptive-comparative study was conducted on 530 patients in medical surgical wards, nurses and physicians of those wards in Kerman Medical University Hospitals. Sampling was done on two stages of quota and consecutive. Data was gathered by “Related Factors of Patient's Sleep” questionnaire with 58 questions about environmental factors, individual-physical, individual-psychological, caring and behaviors before sleep was used. Content validity 0.96, Cronbach alpha 0.86 for questionnaire was confirmed. Data were analyzed by using SPSS/18 software, descriptive statistics, (frequency, mean, SD), independent T- test and ANOVA.

Factors influencing sleep health in view of physicians, nurses and patients were not significant. The most prevalent environmental factor was reported as sleeping on hospital beds and changing the bed, pain as a physical factor, being worry about family and separation from them were as mental problems. The most prevalent habit before sleeping was, talking to others and the major sleep distraction for patients, was waking them up for routine nursing cares.

Patients hospitalized in medical and surgical wards don’t have good sleep due to several reasons. Nurses can help to improve patients sleep by solving some of these problems. They can arrange a quiet environment, and try to relive some of the physical concerns. In addition they can decrease patient's anxiety by communicating and talking with them. This provides a healthy sleep which ultimately leads to mental and physical health of the patients

Humic acid is an organic acid without environmental destructive effects that is applied for increasing germination rate and wheat establishment. In order to evaluate effects of different levels of humic acid on germination of four wheat cultivars; an experiment was conducted in 2008 at Research Laboratory of Faculty of Agriculture, Ferdowsi University of Mashhad. A randomized completely block design with four replications used with factorial combination of humic acid concentration (0, 36, 54, and 72 mg/l) and wheat cultivars (Sayons, Chamran, Pishtaz and Sabalan). Results showed that all traits except germination rate were significantly different

Varicose veins is a common complication people who are forced to stay on their feet for a long time because of the kind of their jobs. The nurses who work on operating rooms have to stay on their feet for a long time and without movement so as a result, this situation makes them face the lower limbs varicose veins.

This research is a descriptive study determining the views of the nurses working in operating rooms of the hospitals affiliated to Kerman University of Medical Sciences about preventive actions for lower limb varicose veins.

The questionnaire contained 23 questions which drew up in two sections and in order to analyze the data, central tendency, dispersion, ANOVA and the T test were used.

The results of this research indicate that most of the answers of personnel about their views of the individual steps for preventing lower limb varicose veins and also about the steps of some organizations for preventing the lower limb varicose veins were 48.3% and 59% respectively. Examination of the connection between nurses’ views about the individual steps and the demographic characteristics of the "T" test between females and males indicated a significant difference (P<0.008). Other demographic characteristics didn't show any statistically significant difference. In a comparison between the average of scores of nurses’ views about the organizational preventive steps and demographic characteristics according to ANOVA test between educational documents and the position showed significant difference (P<0.01) respectively (P<0.005). Demographic characteristics no statistically significant difference were seen.

Considering these results, the necessity for increasing the personnel's knowledge of how to prevent the varicose veins and also the necessity for provision enough possibilities in this field are quite felt.