Background:Mobile technology has great potential to improve adherence and treatment outcomes in healthcare settings.However,text messaging and phone calls are unaffordable in many resource-limited areas.This study inv...Background:Mobile technology has great potential to improve adherence and treatment outcomes in healthcare settings.However,text messaging and phone calls are unaffordable in many resource-limited areas.This study investigates the use of a no-cost alternative mobile phone technology using missed calls(‘buzzing’)to act as a patient reminder.The use of missed calls as a patient reminder was evaluated for feasibility and effectiveness as an appointment reminder in the follow-up of newly-diagnosed human immunodeficiency virus(HIV)positive patients in an HIV testing and counselling department in rural Swaziland.Methods:This pilot study uses a before-and-after operational research study design,with all patients with mobile phones being offered the intervention.The primary outcome was the rate of attendance at the HIV testing and counselling department for collection of results in those with mobile phones before and after the introduction of the intervention.Results:Over two-thirds,71.8%(459/639),of patients had a mobile phone.All patients with a mobile phone consented to being buzzed.There was no difference in attendance for follow-up at the clinic before and after the intervention was implemented(80.1%versus 83.3%,p=0.401),or after adjusting for confounding factors(OR 1.13,p=0.662).Conclusion:This pilot study illustrates that mobile technology may be feasible in rural,resource-poor settings as there are high rates of mobile phone ownership and the intervention had a 100%uptake rate,with positive feedback from staff and patients.In this particular setting,the intervention did not improve attendance rates.However,further research is planned to investigate the impact on adherence to appointments and medications in other settings,such as HIV chronic care follow-up and as part of an enhanced package to improve adherence.展开更多
Youngsters learn that with the right approach,museums can rhyme with fun Desp Ite her childish looks,eight-year-old Meng Ziyu isn’t like other girls her age-infatuated with Barbie dolls or the latest Disney film.What...Youngsters learn that with the right approach,museums can rhyme with fun Desp Ite her childish looks,eight-year-old Meng Ziyu isn’t like other girls her age-infatuated with Barbie dolls or the latest Disney film.What she really gets a kick out of is visiting a museum with her mother on weekends.展开更多
Flowers that have heteromorphic stamens （heterantherous flowers） have intrigued many researchers ever since the phenomenon was discovered in the 19th century. The morphological differentiation in androecia has been ...Flowers that have heteromorphic stamens （heterantherous flowers） have intrigued many researchers ever since the phenomenon was discovered in the 19th century. The morphological differentiation in androecia has been suggested as a reflection of ＂labor division＂ in pollination in which one type of stamens attracts pollinators and satisfies their demand for pollen as food and the other satisfies the plant＇s need for safe gamete dispersal. The extent and patterns of stamen differentiation differ notably among taxa with heterantherous flowers. Seven species with heteromorphic stamens in three genera were sampled from Leguminosae and Melastomataceae, and the morphological difference of androecia, pollen content, pollen histochemistry and viability, pollen micro- morphology, as well as the main pollinators were examined and compared. Pollen number differs significantly between stamen sets of the same flower in most species investigated, and a correlation of pollen number and anther size was substantiated. Higher pollen viabilities were found in the long （pollinating） stamens of Senna alata （L.） Roxb. and S. bicapsularis （L.） Roxb. Dimorphic pollen exine ornamentation is reported here for the first time in Fordiophytonfaberi Stapf. The height of stigma and anther tips of the long stamens in natural conditions was proved to be highly correlated, supporting the hypothesis that they contact similar areas of the pollinator＇s body.展开更多
Transonic rudder buzz responses based on the computational fluid dynamics or computational structural dynamics(CFD/CSD)loosely method are analyzed for a tailless flying wing unmanned aerial vehicle(UAV).The Reynolds-a...Transonic rudder buzz responses based on the computational fluid dynamics or computational structural dynamics(CFD/CSD)loosely method are analyzed for a tailless flying wing unmanned aerial vehicle(UAV).The Reynolds-averaged Navier-Stokes(RANS)equations and finite element methods based on the detailed aerodynamic and structural model are established,in which the aerodynamic dynamic meshes adopt the unstructured dynamic meshes based on the combination of spring-based smoothing and local remeshing methods,and the lower-upper symmetric-Gauss-Seidel(LU-SGS)iteration and Harten-Lax-van Leer-Einfeldt-Wada(HLLEW)space discrete methods based on the shear stress transport(SST)turbulence model are used to calculate the aerodynamic force.The constraints of the rudder motions are fixed at the end of structural model of the flying wing UAV,and the structural geometric nonlinearities are also considered in the flying wing UAV with a high aspect ratio.The interfaces between structural and aerodynamic models are built with an exact match surface where load transferring is performed based on 3Dinterpolation.The flying wing UAV transonic buzz responses based on the aerodynamic structural coupling method are studied,and the rudder buzz responses and aileron,elevator and flap vibration responses caused by rudder motion are also investigated.The effects of attack,height,rotating angular frequency and Mach number under transonic conditions on the flying wing UAV rudder buzz responses are discussed.The results can be regarded as a reference for the flying wing UAV engineering vibration analysis.展开更多
同学们,你们喜欢吃奶酪吗?本期,Abby和Jack围绕着奶酪展开了一段有趣的小故事,一起来看看吧!Real Cheese真正的奶酪Abby:I wish my parents would take me to Europe.Jack:Why do you want to go there?Abby:I loveEuropeanfood,especia...同学们,你们喜欢吃奶酪吗?本期,Abby和Jack围绕着奶酪展开了一段有趣的小故事,一起来看看吧!Real Cheese真正的奶酪Abby:I wish my parents would take me to Europe.Jack:Why do you want to go there?Abby:I loveEuropeanfood,especiallypizza.Jack:You don't need to go to Italy to eat pizza;you can eat it here.Abby:But I want to eat real Italian pizza with authentic(正宗的)European cheese on top!展开更多
文摘Background:Mobile technology has great potential to improve adherence and treatment outcomes in healthcare settings.However,text messaging and phone calls are unaffordable in many resource-limited areas.This study investigates the use of a no-cost alternative mobile phone technology using missed calls(‘buzzing’)to act as a patient reminder.The use of missed calls as a patient reminder was evaluated for feasibility and effectiveness as an appointment reminder in the follow-up of newly-diagnosed human immunodeficiency virus(HIV)positive patients in an HIV testing and counselling department in rural Swaziland.Methods:This pilot study uses a before-and-after operational research study design,with all patients with mobile phones being offered the intervention.The primary outcome was the rate of attendance at the HIV testing and counselling department for collection of results in those with mobile phones before and after the introduction of the intervention.Results:Over two-thirds,71.8%(459/639),of patients had a mobile phone.All patients with a mobile phone consented to being buzzed.There was no difference in attendance for follow-up at the clinic before and after the intervention was implemented(80.1%versus 83.3%,p=0.401),or after adjusting for confounding factors(OR 1.13,p=0.662).Conclusion:This pilot study illustrates that mobile technology may be feasible in rural,resource-poor settings as there are high rates of mobile phone ownership and the intervention had a 100%uptake rate,with positive feedback from staff and patients.In this particular setting,the intervention did not improve attendance rates.However,further research is planned to investigate the impact on adherence to appointments and medications in other settings,such as HIV chronic care follow-up and as part of an enhanced package to improve adherence.
文摘Youngsters learn that with the right approach,museums can rhyme with fun Desp Ite her childish looks,eight-year-old Meng Ziyu isn’t like other girls her age-infatuated with Barbie dolls or the latest Disney film.What she really gets a kick out of is visiting a museum with her mother on weekends.
基金supported by National Natural Science Foundation of China (30570314)the Knowledge Innovation Program of Chinese Academy of Sciences (Grant No.KSCX2-YW-Z-027)
文摘Flowers that have heteromorphic stamens （heterantherous flowers） have intrigued many researchers ever since the phenomenon was discovered in the 19th century. The morphological differentiation in androecia has been suggested as a reflection of ＂labor division＂ in pollination in which one type of stamens attracts pollinators and satisfies their demand for pollen as food and the other satisfies the plant＇s need for safe gamete dispersal. The extent and patterns of stamen differentiation differ notably among taxa with heterantherous flowers. Seven species with heteromorphic stamens in three genera were sampled from Leguminosae and Melastomataceae, and the morphological difference of androecia, pollen content, pollen histochemistry and viability, pollen micro- morphology, as well as the main pollinators were examined and compared. Pollen number differs significantly between stamen sets of the same flower in most species investigated, and a correlation of pollen number and anther size was substantiated. Higher pollen viabilities were found in the long （pollinating） stamens of Senna alata （L.） Roxb. and S. bicapsularis （L.） Roxb. Dimorphic pollen exine ornamentation is reported here for the first time in Fordiophytonfaberi Stapf. The height of stigma and anther tips of the long stamens in natural conditions was proved to be highly correlated, supporting the hypothesis that they contact similar areas of the pollinator＇s body.
基金supported by the Natural Science Foundation of China(No.61074155)the Shaanxi Provincial Natural Science Foundation of China(No.2013JM015)
文摘Transonic rudder buzz responses based on the computational fluid dynamics or computational structural dynamics(CFD/CSD)loosely method are analyzed for a tailless flying wing unmanned aerial vehicle(UAV).The Reynolds-averaged Navier-Stokes(RANS)equations and finite element methods based on the detailed aerodynamic and structural model are established,in which the aerodynamic dynamic meshes adopt the unstructured dynamic meshes based on the combination of spring-based smoothing and local remeshing methods,and the lower-upper symmetric-Gauss-Seidel(LU-SGS)iteration and Harten-Lax-van Leer-Einfeldt-Wada(HLLEW)space discrete methods based on the shear stress transport(SST)turbulence model are used to calculate the aerodynamic force.The constraints of the rudder motions are fixed at the end of structural model of the flying wing UAV,and the structural geometric nonlinearities are also considered in the flying wing UAV with a high aspect ratio.The interfaces between structural and aerodynamic models are built with an exact match surface where load transferring is performed based on 3Dinterpolation.The flying wing UAV transonic buzz responses based on the aerodynamic structural coupling method are studied,and the rudder buzz responses and aileron,elevator and flap vibration responses caused by rudder motion are also investigated.The effects of attack,height,rotating angular frequency and Mach number under transonic conditions on the flying wing UAV rudder buzz responses are discussed.The results can be regarded as a reference for the flying wing UAV engineering vibration analysis.
文摘同学们,你们喜欢吃奶酪吗?本期,Abby和Jack围绕着奶酪展开了一段有趣的小故事,一起来看看吧!Real Cheese真正的奶酪Abby:I wish my parents would take me to Europe.Jack:Why do you want to go there?Abby:I loveEuropeanfood,especiallypizza.Jack:You don't need to go to Italy to eat pizza;you can eat it here.Abby:But I want to eat real Italian pizza with authentic(正宗的)European cheese on top!
