Nowadays some new ideas of fractional derivatives have been used successfully in the present research community to study different types of mathematical models.Amongst them,the significant models of fluids and heat or...Nowadays some new ideas of fractional derivatives have been used successfully in the present research community to study different types of mathematical models.Amongst them,the significant models of fluids and heat or mass transfer are on priority.Most recently a new idea of fractal-fractional derivative is introduced;however,it is not used for heat transfer in channel flow.In this article,we have studied this new idea of fractal fractional operators with power-law kernel for heat transfer in a fluid flow problem.More exactly,we have considered the free convection heat transfer for a Newtonian fluid.The flow is bounded between two parallel static plates.One of the plates is heated constantly.The proposed problem is modeled with a fractal fractional derivative operator with a power-law kernel and solved via the Laplace transform method to find out the exact solution.The results are graphically analyzed via MathCad-15 software to study the behavior of fractal parameters and fractional parameter.For the influence of temperature and velocity profile,it is observed that the fractional parameter raised the velocity and temperature as compared to the fractal operator.Therefore,a combined approach of fractal fractional explains the memory of the function better than fractional only.展开更多
Objective:To examine the effect of upright and ambulant positions versus lying down during the active first stage of labor on birth outcomes for nulliparous women.Methods:This is a randomized controlled clinical trial...Objective:To examine the effect of upright and ambulant positions versus lying down during the active first stage of labor on birth outcomes for nulliparous women.Methods:This is a randomized controlled clinical trial conducted at the delivery department of Damanhour Educational Institute,El Behira Governorate,Egypt.The study sample involved 150 parturient women equally divided into intervention and control groups using randomization block technique.The researchers used four tools for data collection:Demographic data interview schedule,World Health Organization Partograph,Apgar’s score,to evaluate neonatal outcomes,and visual analogue pain intensity scale.For the study group,the parturient women were encouraged to assume one of the upright positions or ambulating around the bed so as to maintain the pelvis in vertical plane as far as possible for 20-25 min for every 1 h.The control group received routine hospital care,which includes lying down in bed.IBM SPSS 23.0 was used to analyze the data.Results:Significant differences(P<0.05)were observed between the study and control groups in relation to cervical dilation,fetal head descent,uterine contractions interval,and frequency.The duration of the first stage of labor significantly reduced(P=0.018)in the intervention group compared with control group.No significant differences(P>0.05)were observed between both groups in term of emergency cesarean birth rates,oxytocin use,and neonatal outcomes.Conclusions:This study proves that upright and ambulant positions significantly enhance uterine contractility,cervical dilatation,and fetal head descent and reduce the first stage duration.展开更多
基金This work was supported by the Natural Science Foundation of China(Grant Nos.61673169,11701176,11626101,11601485).
文摘Nowadays some new ideas of fractional derivatives have been used successfully in the present research community to study different types of mathematical models.Amongst them,the significant models of fluids and heat or mass transfer are on priority.Most recently a new idea of fractal-fractional derivative is introduced;however,it is not used for heat transfer in channel flow.In this article,we have studied this new idea of fractal fractional operators with power-law kernel for heat transfer in a fluid flow problem.More exactly,we have considered the free convection heat transfer for a Newtonian fluid.The flow is bounded between two parallel static plates.One of the plates is heated constantly.The proposed problem is modeled with a fractal fractional derivative operator with a power-law kernel and solved via the Laplace transform method to find out the exact solution.The results are graphically analyzed via MathCad-15 software to study the behavior of fractal parameters and fractional parameter.For the influence of temperature and velocity profile,it is observed that the fractional parameter raised the velocity and temperature as compared to the fractal operator.Therefore,a combined approach of fractal fractional explains the memory of the function better than fractional only.
文摘Objective:To examine the effect of upright and ambulant positions versus lying down during the active first stage of labor on birth outcomes for nulliparous women.Methods:This is a randomized controlled clinical trial conducted at the delivery department of Damanhour Educational Institute,El Behira Governorate,Egypt.The study sample involved 150 parturient women equally divided into intervention and control groups using randomization block technique.The researchers used four tools for data collection:Demographic data interview schedule,World Health Organization Partograph,Apgar’s score,to evaluate neonatal outcomes,and visual analogue pain intensity scale.For the study group,the parturient women were encouraged to assume one of the upright positions or ambulating around the bed so as to maintain the pelvis in vertical plane as far as possible for 20-25 min for every 1 h.The control group received routine hospital care,which includes lying down in bed.IBM SPSS 23.0 was used to analyze the data.Results:Significant differences(P<0.05)were observed between the study and control groups in relation to cervical dilation,fetal head descent,uterine contractions interval,and frequency.The duration of the first stage of labor significantly reduced(P=0.018)in the intervention group compared with control group.No significant differences(P>0.05)were observed between both groups in term of emergency cesarean birth rates,oxytocin use,and neonatal outcomes.Conclusions:This study proves that upright and ambulant positions significantly enhance uterine contractility,cervical dilatation,and fetal head descent and reduce the first stage duration.
