Quantum Yang-Baxter equation and constant R-matrix over Grassmann algebra     

DUPLIJ Steven KOTULSKA Olga SADOVNIKOV Alexander 《浙江大学学报(A卷英文版)》2005,6(10):1065-1079

INTRODUCTION The Yang-Baxter equation(Yang,1967;Baxter,1972)is one of the most valuable concepts in modern theoretical physics(Baxter,1982).The importance of detailed study of Yang-Baxter equation solutions is due to its key role in constant solution models of sta-tistics mechanics(Baxter,1972;1982)and field the-ory in lower dimensions(Yang,1967),conformal field theory(Di Francesco et al.,1997)and in quan-tum integrable systems(Faddeev et al.,1990).From the group-theoretical viewpoint…  相似文献   

Beyond Hypothesis Testing     

Ioannidou  Olga  Erduran  Sibel 《Science & Education》2021,30(2):345-364

Science & Education - Recent reforms in science education have promoted students’ understanding of how science works, including the methodological approaches used by scientists. Given...  相似文献   

Understanding teacher design practices for digital inquiry–based science learning: the case of Go-Lab     

de Jong  Ton  Gillet  Denis  Rodríguez-Triana  María Jesús  Hovardas  Tasos  Dikke  Diana  Doran  Rosa  Dziabenko  Olga  Koslowsky  Jens  Korventausta  Miikka  Law  Effie  Pedaste  Margus  Tasiopoulou  Evita  Vidal  Gérard  Zacharia  Zacharias C. 《Educational technology research and development : ETR & D》2021,69(2):417-444

Designing and implementing online or digital learning material is a demanding task for teachers. This is even more the case when this material is used for more engaged forms of learning, such as inquiry learning. In this article, we give an informed account of Go-Lab, an ecosystem that supports teachers in creating Inquiry Learning Spaces (ILSs). These ILSs are built around STEM–related online laboratories. Within the Go-Lab ecosystem, teachers can combine these online laboratories with multimedia material and learning apps, which are small applications that support learners in their inquiry learning process. The Go-Lab ecosystem offers teachers ready–made structures, such as a standard inquiry cycle, alternative scenarios or complete ILSs that can be used as they are, but it also allows teachers to configure these structures to create personalized ILSs. For this article, we analyzed data on the design process and structure of 2414 ILSs that were (co)created by teachers and that our usage data suggest have been used in classrooms. Our data show that teachers prefer to start their design from empty templates instead of more domain–related elements, that the makeup of the design team (a single teacher, a group of collaborating teachers, or a mix of teachers and project members) influences key design process characteristics such as time spent designing the ILS and number of actions involved, that the characteristics of the resulting ILSs also depend on the type of design team and that ILSs that are openly shared (i.e., published in a public repository) have different characteristics than those that are kept private.

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Communication between teacher and child in early child education: Vygotskian theory and educational practice / La comunicación entre profesor y alumno en la educación infantil: la teoría vygotskiana y la práctica educativa     

Nickolay Veraksa  Olga Shiyan  Igor Shiyan  Ingrid Pramling-Samuelsson 《Infancia y Aprendizaje》2016,39(2):221-243

The idea of cultural development of a child as introduced by Vygotsky has informed much educational research and theorizing in recent decades. However, in the West it to a large extent tends to be put in the background of the investigation of how teachers or other more experienced participants support children’s development, with the concept of scaffolding in the foreground. In this article we review original research and educational psychological theorizing from Russia, work that is less known in the West, discussing how teachers can enter into this developmental field to challenge and support children’s development.  相似文献   

Microfluidics platform for measurement of volume changes in immobilized intestinal enteroids     

Byung-Ju Jin  Sailaja Battula  Nick Zachos  Olga Kovbasnjuk  Jennifer Fawlke-Abel  Julie In  Mark Donowitz  Alan S. Verkman 《Biomicrofluidics》2014,8(2)

Intestinal enteroids are ex vivo primary cultured single-layer epithelial cell spheroids of average diameter ∼150 μm with luminal surface facing inward. Measurement of enteroid swelling in response to secretagogues has been applied to genetic testing in cystic fibrosis and evaluation of drug candidates for cystic fibrosis and secretory diarrheas. The current measurement method involves manual addition of drugs and solutions to enteroids embedded in a Matrigel matrix and estimation of volume changes from confocal images of fluorescently stained enteroids. We developed a microfluidics platform for efficient trapping and immobilization of enteroids for quantitative measurement of volume changes. Multiple enteroids are trapped in a “pinball machine-like” array of polydimethylsiloxane posts for measurement of volume changes in unlabeled enteroids by imaging of an extracellular, high-molecular weight fluorescent dye. Measurement accuracy was validated using slowly expanding air bubbles. The method was applied to measure swelling of mouse jejunal enteroids in response to an osmotic challenge and cholera toxin-induced chloride secretion. The microfluidics platform allows for parallel measurement of volume changes on multiple enteroids during continuous superfusion, without an immobilizing matrix, and for quantitative volume determination without chemical labeling or assumptions about enteroid shape changes during swelling.  相似文献   

Welche bildungswissenschaftlichen Inhalte sind wichtig in der Lehrerbildung?     

Dr. Olga Kunina-Habenicht  Hendrik Lohse-Bossenz  Prof. Dr. Mareike Kunter  Theresa Dicke  Doris F?rster  Jill G??ling  Franziska Schulze-Stocker  Annett Schmeck  Jürgen Baumert  Detlev Leutner  Ewald Terhart 《Zeitschrift für Erziehungswissenschaft》2012,15(4):649-682

In reviews of university teacher training, the parts of the curriculum based on educational science are often criticized as missing practical relevance and being non-cumulative. At the same time, uncertainty exists regarding which educational science based content is important for teacher candidates. The objective of the Delphi study presented here was the identification of core educational science content in university training. To this aim, a survey was carried out amongst 49 experts from different subject areas and phases of teacher training in three rounds using a standardized questionnaire. In the first round, 213 topics were specified, which were then assessed by experts regarding their importance for various aspects of the teaching profession. In the second and third rounds, which had the objective of reducing the number of topics, the experts chose a limited number of topics based on their relevance for university teacher training and for the practical success of teaching itself. The results show that the original list was comprehensive and that there is a consensus among most of the experts on their respective importance for teaching training.  相似文献   

Facet-based opinion retrieval from blogs   总被引：1，自引：0，他引：1  

Olga Vechtomova   《Information processing & management》2010,46(1):71-88

The paper presents methods of retrieving blog posts containing opinions about an entity expressed in the query. The methods use a lexicon of subjective words and phrases compiled from manually and automatically developed resources. One of the methods uses the Kullback–Leibler divergence to weight subjective words occurring near query terms in documents, another uses proximity between the occurrences of query terms and subjective words in documents, and the third combines both factors. Methods of structuring queries into facets, facet expansion using Wikipedia, and a facet-based retrieval are also investigated in this work. The methods were evaluated using the TREC 2007 and 2008 Blog track topics, and proved to be highly effective.  相似文献   

The whole day matters: Understanding 24-hour movement guideline adherence and relationships with health indicators across the lifespan     

Scott Rollo  Olga Antsygina  Mark S. Tremblay 《运动与健康科学(英文)》2020,9(6):493-510

BackgroundNew research suggests that the composition (mix) of movement behaviors within a 24-h period may have important implications for health across the lifespan. Consistent with this integrated movement behavior paradigm, a number of countries across the world have developed and released 24-h movement guidelines for specific age groups. The purpose of this systematic review was to examine the associations between the 24-h time-use composition of movement behaviors, or adherence to 24-h movement guidelines, and multiple health indicators across the lifespan.MethodsFive online databases (PsycINFO, PubMed, SPORTDiscus, Web of Science, and Ovid MEDLINE) were searched for relevant peer-reviewed studies published between January 2015 and January 2020 that met the a priori inclusion criteria, with no study design limits. The methodological quality of research evidence for each individual study and for each health indicator was assessed by using a modified version of the Downs and Black checklist.ResultsA total of 51 studies from 20 different countries met the inclusion criteria. A total of 31 studies examined adherence (meeting vs. not meeting) to 24-h movement guidelines, and 20 studies used compositional analyses to explore the 24-h time-use composition of movement behaviors. Findings indicated that meeting the 24-h movement guidelines were (1) not associated with adiposity among toddlers, (2) favorably associated with health-related quality of life, social-cognitive development, and behavioral and emotional problems among preschoolers, (3) favorably associated with global cognition, health-related quality of life, and healthy dietary patterns in children, and (4) favorably associated with adiposity, fitness, and cardiometabolic, mental, social, and emotional health among children and youth. Significant associations were also found between the composition of 24-h movement behaviors and indicators of (1) adiposity and bone and skeletal health among preschoolers, (2) health-related quality of life among children, (3) adiposity, fitness, and cardiometabolic, social, and emotional health among children and youth, (4) cardiometabolic health in adults, (5) adiposity and fitness among adults and older adults, and (6) mental health and risk of mortality among older adults. The quality of the available evidence ranged from poor to good.ConclusionThe current evidence indicates that the composition of movement behaviors within a 24-h period may have important implications for health at all ages and that meeting the current 24-h movement guidelines is associated with a number of desirable health indicators in children and youth. Future studies should employ longitudinal and experimental designs, include valid and reliable measures of 24-h movement behaviors, and examine a wide array of health indicators across all age groups. Such studies would confirm the results from the primarily cross-sectional evidence drawn from studies included in our review and further advance our understanding of the relationships between 24-h movement behaviors and health.  相似文献   

The –ography of markets (or,the responsibilities of market studies)     

Philip Roscoe  Olga Loza 《Journal of Cultural Economy》2019,12(3):215-227

How should we write about markets? What responsibilities does this writing bring upon us? This paper offers an immanent critique of ‘market studies’ scholarship, and through this a call to reflection and reformed action. Turning the intellectual framework of market studies upon itself, we come to see its texts as performative and agential. We discuss these qualities and the associated responsibilities via a reading of literature from the domain of ethnography. An auto-ethnographic sketch of market writing allows us to consider the problematic nature of expertise for market studies scholars and the agency and power of our texts. We find a dual moment of performativity from which our texts emerge more powerful than their authors. On this basis we offer a vision of critical interventions embedded in our texts, underpinned by the intellectual axioms of the market studies programme.  相似文献   

“Immigrant” in Russian and French Print Media (Linguistic and Visual Composition Analyses)     

Tatiana M. Permyakova  Olga L. Antineskul 《Journal of Intercultural Communication Research》2016,45(4):319-337

This study addresses the representation of the linguistic and cultural type “immigrant” in French and Russian media discourse. Linguistic analysis of selected sources shows, on the one hand, signs of tolerance towards immigrants and, on the other hand, evidence of rejecting immigrants, which demonstrates the ambiguity of the matter and indirectly provokes conflicts. Visual composition analysis complements these results by revealing the following: the purpose of immigration – employment – is often socially rejected; immigrants’ sense of community is a specific cultural code in a host culture; and the cultural transfer of an “immigrant” into a different space creates uncertainty or ambiguity.  相似文献