Hourly Price-Based Demand Response for Optimal Scheduling of Integrated Gas and Power Networks Considering Compressed Air Energy Storage

Gas-fired plants are becoming an optimal and practical choice for power generation in electricity grids due to high efficiency and less emissions. Such plants with fast start-up capability and high ramp rate are flexible in response to stochastic load variations. Meanwhile, gas system constraints affect the flexibility and participation of such units in the energy market. Compressed air energy storage (CAES) as a flexible source with high ramp rate can be an alternative solution to reduce the impact of gas system constraints on the operation cost of a power system. In addition, demand response (DR) programs are expressed as practical approaches to overcome peak-demand challenges. This study introduces a stochastic unit commitment scheme for coordinated operation of gas and power systems with CAES technology as well as application of an hourly price-based DR. The introduced model is performed on a six-bus system with a six-node gas system to verify the satisfactory performance of the model

The effect of intensive endurance exercise and probiotic yogurt consumption, on aerobic, anaerobic, white blood cells, lymphocytes, monocytes and neutrophils in young Football players

The Aim of this study was to investigate the effect of intensive endurance exercise and probiotic supplementation on aerobic, anaerobic power, white blood cell (WBC), lymphocytes (LYM), monocytes (MON) and neutrophils (NUT) in young Football players. This study was semi-experimental, 36 young Football players with height 172± 0.77 cm, weight 66.76±5.87 kg and BMI 21.27±2.09 kg/m2, randomly assigned into control (n=18) and experimental (n=18) groups. Medical examinations and physical fitness tests were performed before and after training done. They performed a training program for 8 weeks, three times a week, every session 90 to 120 min. Experiment group consumed 400 ml probiotic yoghurt one hour before every session of training. Both groups trained aerobic exercise with 60-75% and anaerobic with 80-100% (MHR). To determine the variables blood samples were taken four times. Initially, before the training program, there were not significantly different amounts of variables. After 8 weeks in the experiment group, the levels of lymphocytes and neutrophils significantly increased. Any report about URTI infection was not observed. Eight weeks training improved the aerobic and anaerobic power, meanwhile reduce the incidence of URTI after ingestion of probiotic yoghurt. As a conclusion, it is recommended to the athletes to consume probiotic supplement before intensive endurance exercises

Evaluation of Clinical Skills of Final Year Nursing Students in Critical Care Units.

Introduction: Clinical education in critical care units is very important and promotion of quality of clinical education can lead to higher qualification and professionalism of nursing students in this area of practice . So, this study was conducted to evaluate the clinical skills of nursing students in ICU , CCU and dialysis Units . Method & Materials : This research was a cross sectional descriptive one and the samples of this research were 72 final year nursing students of Yazd Shaheed Sadoughi Nursing School. The data was collected by a demographic and checklist questionnaire about clinical skills in ICU, CCU , and dialysis unit . Analysis and descriptive statistics were used for the research goals. Results : Results showed that clinical skills of nursing students in critical care units is ideal, but these skills in CCU are lower than ICU and dialysis unit . Results indicated that the levels of the clinical skills of nursing students were directly related to their examination scores and interest in nursing . Conclusion : Our findings indicate that special attention should be paid to clinical education in critical care units and selection of students in this field should be given special attention