This paper evaluates Look Glass Neighborhood（LGN）, an educational after-school program being experimented in San Diego, California. Following the theories of Vygotskian psychology and the ＂Fifth-Dimension＂ educati...This paper evaluates Look Glass Neighborhood（LGN）, an educational after-school program being experimented in San Diego, California. Following the theories of Vygotskian psychology and the ＂Fifth-Dimension＂ education model, LGN aims at improving bilingual children＇s literacy via interactive games and letter writing activities. Based on previous studies on first language acquisition over past decades, the paper first discusses the inadequacy of research on child narrative development, especially in terms of the lack of attention to bilingual children and the insufficient discussion on applying first language acquisition theories to early literacy education. Then, it demonstrates the unique designs of the ＂Looking Glass Neighborhood＂program by a qualitative analysis of ethnographic data from two elementary school bilingual participants in the program, explicating the program＇s focuses on the interactions between oral performance and content-focused co-writing activities. Finally, the paper explores the possibility to embed some design elements of LGN such as content-based, co-writing activities and indirect oral corrective feedback into China＇s current kindergarten and elementary EFL curriculums.展开更多
Nanoparticle movement near a surface is greatly influenced by electrostatic and Van der Waals forces between the particle and the surface,as well as by Brownian motion.In this paper,several precise equations are deriv...Nanoparticle movement near a surface is greatly influenced by electrostatic and Van der Waals forces between the particle and the surface,as well as by Brownian motion.In this paper,several precise equations are derived to describe the Van der Waals and electrostatic forces between a particle and a surface when the particle is removed from the surface.These include an equation for particle displacement under the electrostatic force,and a numerical calculation for particle displacement under the Van der Waals force.Finally,a kinematic model is constructed to describe the particle distribution under the effects of the electrostatic and Van der Waals forces,as well as the particle’s Brownian motion.The results show that increasing the multiply of the particle and surface zeta potential values and decreasing the ionic strength of the detergent can prevent a particle from redepositing onto a surface.展开更多
文摘This paper evaluates Look Glass Neighborhood（LGN）, an educational after-school program being experimented in San Diego, California. Following the theories of Vygotskian psychology and the ＂Fifth-Dimension＂ education model, LGN aims at improving bilingual children＇s literacy via interactive games and letter writing activities. Based on previous studies on first language acquisition over past decades, the paper first discusses the inadequacy of research on child narrative development, especially in terms of the lack of attention to bilingual children and the insufficient discussion on applying first language acquisition theories to early literacy education. Then, it demonstrates the unique designs of the ＂Looking Glass Neighborhood＂program by a qualitative analysis of ethnographic data from two elementary school bilingual participants in the program, explicating the program＇s focuses on the interactions between oral performance and content-focused co-writing activities. Finally, the paper explores the possibility to embed some design elements of LGN such as content-based, co-writing activities and indirect oral corrective feedback into China＇s current kindergarten and elementary EFL curriculums.
基金supported by the National Natural Science Foundation of China(Grant Nos.91323302 and 51205226)the Science Fund for Creative Research Groups(Grant No.51321092)
文摘Nanoparticle movement near a surface is greatly influenced by electrostatic and Van der Waals forces between the particle and the surface,as well as by Brownian motion.In this paper,several precise equations are derived to describe the Van der Waals and electrostatic forces between a particle and a surface when the particle is removed from the surface.These include an equation for particle displacement under the electrostatic force,and a numerical calculation for particle displacement under the Van der Waals force.Finally,a kinematic model is constructed to describe the particle distribution under the effects of the electrostatic and Van der Waals forces,as well as the particle’s Brownian motion.The results show that increasing the multiply of the particle and surface zeta potential values and decreasing the ionic strength of the detergent can prevent a particle from redepositing onto a surface.
