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
The effect of three different N-fertilization levels （NI： 625, N2：385 and N3：770 kg hal; where in case of N1 was used the 3-6-10＋3MGO＋30% OM and in cases of N2-N3 the 26-0-0 fertilizers） on fresh and dry weight...The effect of three different N-fertilization levels （NI： 625, N2：385 and N3：770 kg hal; where in case of N1 was used the 3-6-10＋3MGO＋30% OM and in cases of N2-N3 the 26-0-0 fertilizers） on fresh and dry weight of the perennial Rosmarinus officinalis （upright cultivar） was investigated during the 2nd year after establishment at the Experimental Farm of the Technological Educational Institute of Thessaly in Greece （TEI; Larissa plain） in 2015. It is well documented that the crop reaches its potential yield on the third year of cultivation and continues producing biomass for as long as eight years. Complete weather data （air temperature, radiation, air humidity, precipitation） were recorded hourly in an automatic meteorological station, which was installed to the experimental farm of TEI. Upon harvest （November 3rd 2015）, the crop reached a maximum fresh yield of 11.67 tons per hectare and dry yield of 4.3, respectively. The average fresh weight was 8.2, 8.4 and 8.9 t hal and the dry weight were 2.6, 3.1 and 3.2 t ha-1 for the N1, N2 and N3 levels, respectively. Furthermore the higher moisture content was observed in the case of N1 level （68%）. Therefore, the above data show that rosemary cultivation could be a promising alternative crop, especially in case of the consideration that average selling price of dry rosemary in Greece is 3.5 ∈ kg^-1 and the average gross income exceeds the amount of 10,000 ∈ ha^-1.展开更多
This article reports a case in which a horizontally impacted wisdom tooth was orthodontically uprighted to replace a missing molar.Through mandibular single-arch treatment utilizing a long-arm buccal tube,uprighting a...This article reports a case in which a horizontally impacted wisdom tooth was orthodontically uprighted to replace a missing molar.Through mandibular single-arch treatment utilizing a long-arm buccal tube,uprighting auxiliary spring,and miniscrew implant,the impacted wisdom tooth was successfully uprighted and mesialized to substitute for the missing molar,effectively re-storing occlusal function in the edentulous area.Written informed consent was obtained from the patient,and the treatment protocol was approved by the institutional ethics committee.展开更多
To investigate the operational mechanism and quality improvement strategies of a reed upright conveying device,first,the structural design was completed,and a force analysis of the conveying process was conducted.A ri...To investigate the operational mechanism and quality improvement strategies of a reed upright conveying device,first,the structural design was completed,and a force analysis of the conveying process was conducted.A rigid-flexible coupling simulation model of reed stalks and the conveying mechanism was then employed to examine the effects of the structural parameters of the conveying chain links on the maximum contact force exerted on the reed stalks and to identify the optimal parameter combination.High-speed photography experiments were carried out during the conveying process to capture the motion states and trajectories of the reed stalks,elucidating the causes of stalk breakage and blockages.Subsequently,response surface experiments were conducted to investigate the primary factors influencing upright conveying quality.Mathematical models for predicting damage rate and conveying rate were established,and the effects of various factors on these indicators were analyzed.Multi-objective optimization of the regression models was performed based on practical production requirements,yielding an optimal parameter combination:transverse conveying speed of the chain at 1.1 m/s,speed ratio of 1.2,and upper conveying chain position at 1.37 m.Experimental results indicated a damage rate of 11.90%and a conveying rate of 95.11%,meeting the operational requirements for mechanized reed harvesting and conveying.These findings provide fundamental theoretical data for the development of reed harvester conveying components and the selection of operational parameters.展开更多
This study investigated the validity and sensitivity of a custom-made shoelace tensile testing system.The aim was to analyze the distribution pattern of shoelace tension in different positions and under different tigh...This study investigated the validity and sensitivity of a custom-made shoelace tensile testing system.The aim was to analyze the distribution pattern of shoelace tension in different positions and under different tightness levels during running.Mechanical tests were conducted using 16 weights,and various statistical analyses,including linear regression,Bland-Altman plots,coefficient of variation,and intraclass correlation coefficient,were performed to assess the system’s validity.Fifteen male amateur runners participated in the study,and three conditions(loose,comfortable,and tight)were measured during an upright stance.The system utilized VICON motion systems,a Kistler force plate,and a Photoelectric gate speed measurement system.Results showed a linear relationship between voltage and load at the three sensors(R2≥0.9997).Bland-Altman plots demonstrated 95%prediction intervals within±1.96SD from zero for all sensors.The average coefficient of variation for each sensor was less than 0.38%.Intraclass correlation coefficient values were larger than 0.999(p<0.0001)for each sensor.The peak tension of the front shoelace was greater than that of the front and middle when the shoelace was loose and tight.The rear shoelace had the highest tension force.The study also found that shoelace tension varied throughout the gait cycle during running.Overall,this research provides a novel and validated method for measuring shoelace tensile stress,which has implications for developing automatic shoelace fastening systems.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.
文摘The effect of three different N-fertilization levels （NI： 625, N2：385 and N3：770 kg hal; where in case of N1 was used the 3-6-10＋3MGO＋30% OM and in cases of N2-N3 the 26-0-0 fertilizers） on fresh and dry weight of the perennial Rosmarinus officinalis （upright cultivar） was investigated during the 2nd year after establishment at the Experimental Farm of the Technological Educational Institute of Thessaly in Greece （TEI; Larissa plain） in 2015. It is well documented that the crop reaches its potential yield on the third year of cultivation and continues producing biomass for as long as eight years. Complete weather data （air temperature, radiation, air humidity, precipitation） were recorded hourly in an automatic meteorological station, which was installed to the experimental farm of TEI. Upon harvest （November 3rd 2015）, the crop reached a maximum fresh yield of 11.67 tons per hectare and dry yield of 4.3, respectively. The average fresh weight was 8.2, 8.4 and 8.9 t hal and the dry weight were 2.6, 3.1 and 3.2 t ha-1 for the N1, N2 and N3 levels, respectively. Furthermore the higher moisture content was observed in the case of N1 level （68%）. Therefore, the above data show that rosemary cultivation could be a promising alternative crop, especially in case of the consideration that average selling price of dry rosemary in Greece is 3.5 ∈ kg^-1 and the average gross income exceeds the amount of 10,000 ∈ ha^-1.
基金supported by Guangxi Medical and Health Appropriate Technology Development and Application Project(No.S2022153)Guangxi Zhuang Autonomous Region Health Commission self-funded research project(No.Z-C20231971)+1 种基金Project to improve basic research ability of young and middle-aged teachers in Guangxi colleges and universities(No.2024KY0499)Guilin Science Research and Technology Development Program(No.20230135-5-1).
文摘This article reports a case in which a horizontally impacted wisdom tooth was orthodontically uprighted to replace a missing molar.Through mandibular single-arch treatment utilizing a long-arm buccal tube,uprighting auxiliary spring,and miniscrew implant,the impacted wisdom tooth was successfully uprighted and mesialized to substitute for the missing molar,effectively re-storing occlusal function in the edentulous area.Written informed consent was obtained from the patient,and the treatment protocol was approved by the institutional ethics committee.
基金supported by Special Funds for Jiangsu Province Agricultural Science and Technology Independent Innovation Fund Project(Grant No.CX3096)the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences(Grant No.31-NIAM-05).
文摘To investigate the operational mechanism and quality improvement strategies of a reed upright conveying device,first,the structural design was completed,and a force analysis of the conveying process was conducted.A rigid-flexible coupling simulation model of reed stalks and the conveying mechanism was then employed to examine the effects of the structural parameters of the conveying chain links on the maximum contact force exerted on the reed stalks and to identify the optimal parameter combination.High-speed photography experiments were carried out during the conveying process to capture the motion states and trajectories of the reed stalks,elucidating the causes of stalk breakage and blockages.Subsequently,response surface experiments were conducted to investigate the primary factors influencing upright conveying quality.Mathematical models for predicting damage rate and conveying rate were established,and the effects of various factors on these indicators were analyzed.Multi-objective optimization of the regression models was performed based on practical production requirements,yielding an optimal parameter combination:transverse conveying speed of the chain at 1.1 m/s,speed ratio of 1.2,and upper conveying chain position at 1.37 m.Experimental results indicated a damage rate of 11.90%and a conveying rate of 95.11%,meeting the operational requirements for mechanized reed harvesting and conveying.These findings provide fundamental theoretical data for the development of reed harvester conveying components and the selection of operational parameters.
文摘This study investigated the validity and sensitivity of a custom-made shoelace tensile testing system.The aim was to analyze the distribution pattern of shoelace tension in different positions and under different tightness levels during running.Mechanical tests were conducted using 16 weights,and various statistical analyses,including linear regression,Bland-Altman plots,coefficient of variation,and intraclass correlation coefficient,were performed to assess the system’s validity.Fifteen male amateur runners participated in the study,and three conditions(loose,comfortable,and tight)were measured during an upright stance.The system utilized VICON motion systems,a Kistler force plate,and a Photoelectric gate speed measurement system.Results showed a linear relationship between voltage and load at the three sensors(R2≥0.9997).Bland-Altman plots demonstrated 95%prediction intervals within±1.96SD from zero for all sensors.The average coefficient of variation for each sensor was less than 0.38%.Intraclass correlation coefficient values were larger than 0.999(p<0.0001)for each sensor.The peak tension of the front shoelace was greater than that of the front and middle when the shoelace was loose and tight.The rear shoelace had the highest tension force.The study also found that shoelace tension varied throughout the gait cycle during running.Overall,this research provides a novel and validated method for measuring shoelace tensile stress,which has implications for developing automatic shoelace fastening systems.
