Higher order corrections in the minimal supersymmetric standard model

EThOS - Electronic Theses Online ServiceGBUnited Kingdo

The second law analysis of natural gas behavior within a vortex tube

Vortex tube is a simple device without a moving part which is capable of separating hot and cold gas streams from a higher pressure inlet gas stream. The mechanism of energy separation has been investigated by several scientists and second law approach has emerged as an important tool for optimizing the vortex tube performance. Here, a thermodynamic model has been used to investigate vortex tube energy separation. Further, a method has been proposed for optimizing the vortex tube based on the rate of entropy generation obtained from experiments. Also, an experimental study has been carried out to investigate the effects of the hot tube length and cold orifice diameter on entropy generation within a vortex tube with natural gas as working fluid. A comparison has been made between air and natural gas as working fluids. The results show that the longest tube generates lowest entropy for NG. For air, it is middle tube which generates lowest entropy. Integration of entropy generation for all available cold mass fractions unveiled that an optimized value for hot tube length and cold orifice diameter is exist

Study of Awareness and Performance of Ahvazi Midwives about Physiologic Childbirth in Public Hospitals, 2016

Abstract Introduction: To promote normal childbirth the care during childbirth should be on evidence-based care. Evidence-based care practices promote physiological birth and midwives.  This study studied midwives’ awareness and performance about physiological childbirth in Ahvaz publiv maternity services.Methods: This descriptive study was conducted on maternity units in which 128 midwives were recruited using census sampling. The researcher made questionnaire were used for self-reporting of awareness and performance of midwives.Results: Majority of midwives (86.7%) had Bachelor degree, had (1-7) year’s work experience (64.1). This study showed that the Ahvazi midwives had relatively good awareness of physiologic labour items however the performance of them was not as ideal as their awareness.Conclusions: Iranian midwives are informed about evidence-based practice in childbirth which indicates that attempts to promote physiologic childbirth has been useful, however multifaceted implementation strategies are necessary to promote the use of evidence-based practice in clinical practice and health care decision making during labour childbirth