نتایج جستجو برای: latent phase and active phase
تعداد نتایج: 16984463 فیلتر نتایج به سال:
Background and purpose: Pain in labor causes stress and reduces self-steem. Effective support is a key factor in reducing stress during delivery. The present study aimed to investigate and compare the effects of standard maternity care, continuous supports from private midwife, and female relatives on type and process of delivery, maternal satisfaction, and breastfeeding. Materials and methods...
background: oxytocin infusion is used for induction or augmentation of labor to prevent prolonged labor. a cheap and nonaggressive alternative which is effectively used for contraction stress test is nipple stimulation. however research regarding its efficacy and safety is still limited. this study aims to compare the effectiveness of nipple stimulation and oxytocin infusion on the duration of ...
in this paper, we studied effect of different parameters including density, viscosity, interfacial tension and solute transfer concentration on phase inversion hold-up. the results showed that change in phase density ratio had no effect on phase inversion hold-up. it also disclosed that the phase viscosity ratio was the most effective parameter affecting phase inversion hold-up and each phase h...
جهت افزایش مقاومت به اکسیداسیون سوپرآلیاژهای پایه نیکل ، ایجاد پوشش مناسب بر روی این آلیاژها ضروری است. در تحقیق حاضر برای بررسی عملیات پوشش، نمونه هایی از جنس سوپرآلیاژ پایه نیکل gtd-111 تهیه شد و عملیات آلومینایزینگ فاز گازی gas phase aluminizing بر روی آنها انجام شد. بررسی نتایج حاکی از ایجاد یک پوشش نفوذی از نوع آلومیناید می باشد. یکنواختی ضخامت پوشش در حد مطلوب است. با افزایش زمان ...
Background and Purpose: Left to their own choice, parturients will usually select positions they find most comfortable and will frequently change their positions over the course of labor. Maternal changing the positions will adjust fetus alignment to pass through the birth canal. Therefore, maternal positioning choice will include those positions with maximum comfort and those which improve the...
Background: Labor is a painful event and its pain is one of the most severe one. Reducing this pain, for lowering the negative effects on pregnant women and also labor progress, has always been under serious concern. The purpose of the present study was to compare the effect of entonox and oxygen for lowering labor pain and also its effect on the progress of labor. Methods: A randomiz...
Introduction: Prolonged labor can lead to maternal and neonatal complications. The purpose of this study was to investigate the effect of Pethidine on the duration of active labor in nulli-parous women. Materials and methods: In a randomized clinical 90 nulliparous women with uncomplicated singleton pregnancies at term were randomly assigned into two groups. The first group received 50 mg Pet...
در حالت کلی معادلات دیفرانسیل با مقادیر اولیه را نمی توان دیفرانسیل می توان جواب طیف وسیعی از مسائل کاربردی را مشخص نمود با روش های تئوری حل نمود، لذا با حل عددی معادلات یک حالت خاص از مسأله مقدار اولیه، مسأله ای به فرم: y^=f(x,y) , y(a)=?, y^ (a)=?^^ است که مشتق اول در آن ظاهر نمی شود. این معادلات طیف وسیعی از پدیده های اطراف ما را شامل می شود، مثلاً معادلاتی که دارای جواب نوسانی هستند از ...
The validity of previous human factors data may be called into question when technology changes rapidly or new and radical designs are introduced as with the advent of unmanned aircraft systems (UASs). The purpose of this study was to analyze the role and pattern of active and latent human failures in USAF MQ-1 Predator UAS mishaps using the Human Factors Analysis and Classification System. A m...
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