Some commercially available solar panels with very high efficiencies for terrestrial photovoltaic applications are based on the amorphous silicon on crystalline silicon material system. This type ofheterostructure has...Some commercially available solar panels with very high efficiencies for terrestrial photovoltaic applications are based on the amorphous silicon on crystalline silicon material system. This type ofheterostructure has more than 40 years＇ old history. The early development of the technology and the results, obtained in the last years with this type of solar cell are reviewed. In particular it is demonstrated why the physical understanding of the interface properties and band-structure was important for the development of high efficiency solar cells.展开更多
Contemporary college students will be the future mainstay of the world and the country. It is significant to accept education of the Olympic culture. While they know the long and broad Olympic culture, they can also i...Contemporary college students will be the future mainstay of the world and the country. It is significant to accept education of the Olympic culture. While they know the long and broad Olympic culture, they can also inherit the Olympic spirit of mutual understanding, friendship, solidarity and fair competition, know that the world needs to be cleaner, more humane, more united.展开更多
At present, the Portuguese education system promotes the development of new literacies in all education levels in response to new requirements of the digital world which imply changes in children＇s education. In fact...At present, the Portuguese education system promotes the development of new literacies in all education levels in response to new requirements of the digital world which imply changes in children＇s education. In fact, reading and writing are no longer limited exclusively to books, rather they are associated with diversified digital media integrating text, sound, image, and video. In this context, we developed an exploratory study in a kindergarten with the children and their family members. Data were collected through participant observation, children conversational interviews, and digital narratives produced by children. Data analysis is based on content analysis with NVivo software support. The emergence of literacy is evident in verbal interactions in peer-group work, in contact with the written text, in ＂writing＂ in various media, and in sharing knowledge, discoveries, and digital narratives produced in an online community （http：//janelajardim.ning.com）. This paper presents： （1） a systematic literature review in the field of digital narrative and emergent literacy; （2） the description of children＇s activities concerning interactive multimodal narrative; （3） the results of this work; and （4） the conclusion about contribution of multimodal narratives to the emergence of reading, writing, and digital skills展开更多
In the 1980s and 1990s, China was an important part of the worldwide decentralization of education. Mainstream research at the time highlighted the inherent rationality of a ＂low center of gravity＂ and multiple sour...In the 1980s and 1990s, China was an important part of the worldwide decentralization of education. Mainstream research at the time highlighted the inherent rationality of a ＂low center of gravity＂ and multiple sources of educational funding and stressed decentralization as an irreversible trend. Since 2001, however, China has readjusted its system of administration of rural compulsory education. Our empirical analysis suggests that this reform is not an extension and refinement of the previous decentralization reform; rather, it represents a renewed effort to reestablish government responsibility for compulsory education. The 200t reform has led to a rapid increase in government investment in education and a considerable improvement in educational equity, especially in primary education. It therefore provides not just a valuable reference for educational reform around the world, but also an opportunity to reflect upon a series of propositions and assumptions in mainstream research.展开更多
文摘Some commercially available solar panels with very high efficiencies for terrestrial photovoltaic applications are based on the amorphous silicon on crystalline silicon material system. This type ofheterostructure has more than 40 years＇ old history. The early development of the technology and the results, obtained in the last years with this type of solar cell are reviewed. In particular it is demonstrated why the physical understanding of the interface properties and band-structure was important for the development of high efficiency solar cells.
文摘Contemporary college students will be the future mainstay of the world and the country. It is significant to accept education of the Olympic culture. While they know the long and broad Olympic culture, they can also inherit the Olympic spirit of mutual understanding, friendship, solidarity and fair competition, know that the world needs to be cleaner, more humane, more united.
文摘At present, the Portuguese education system promotes the development of new literacies in all education levels in response to new requirements of the digital world which imply changes in children＇s education. In fact, reading and writing are no longer limited exclusively to books, rather they are associated with diversified digital media integrating text, sound, image, and video. In this context, we developed an exploratory study in a kindergarten with the children and their family members. Data were collected through participant observation, children conversational interviews, and digital narratives produced by children. Data analysis is based on content analysis with NVivo software support. The emergence of literacy is evident in verbal interactions in peer-group work, in contact with the written text, in ＂writing＂ in various media, and in sharing knowledge, discoveries, and digital narratives produced in an online community （http：//janelajardim.ning.com）. This paper presents： （1） a systematic literature review in the field of digital narrative and emergent literacy; （2） the description of children＇s activities concerning interactive multimodal narrative; （3） the results of this work; and （4） the conclusion about contribution of multimodal narratives to the emergence of reading, writing, and digital skills
文摘In the 1980s and 1990s, China was an important part of the worldwide decentralization of education. Mainstream research at the time highlighted the inherent rationality of a ＂low center of gravity＂ and multiple sources of educational funding and stressed decentralization as an irreversible trend. Since 2001, however, China has readjusted its system of administration of rural compulsory education. Our empirical analysis suggests that this reform is not an extension and refinement of the previous decentralization reform; rather, it represents a renewed effort to reestablish government responsibility for compulsory education. The 200t reform has led to a rapid increase in government investment in education and a considerable improvement in educational equity, especially in primary education. It therefore provides not just a valuable reference for educational reform around the world, but also an opportunity to reflect upon a series of propositions and assumptions in mainstream research.
