Elicitation and use of relevance feedback information     

Olga Vechtomova  Murat Karamuftuoglu 《Information processing & management》2006

The paper presents two approaches to interactively refining user search formulations and their evaluation in the new High Accuracy Retrieval from Documents (HARD) track of TREC-12. The first method consists of asking the user to select a number of sentences that represent documents. The second method consists of showing to the user a list of noun phrases extracted from the initial document set. Both methods then expand the query based on the user feedback. The TREC results show that one of the methods is an effective means of interactive query expansion and yields significant performance improvements. The paper presents a comparison of the methods and detailed analysis of the evaluation results.  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   

Discursive practices of private online tutoring websites in Russia     

Olga Kozar 《Discourse: Studies in the Cultural Politics of Education》2015,36(3):354-368

A recent development in English teaching in Russia is the emergence of private online language-tutoring schools, which offer one-on-one lessons by means of audio/videoconferencing. It remains unclear: (1) how these new providers of educational services are presenting themselves to the potential learners; (2) what ideology they tend to drawn on and (3) whether there is sufficient similarity to conceptualise these websites as exemplars of the same genre. This paper employs the tools of critical discourse analysis (CDA), Genre Theory and Appraisal within the Systemic Functional Linguistics to study the language of 17 websites of private online language schools. The study aims to investigate whether the websites exhibit similar discourse and ideology and whether they might belong to the same ‘genre prototype’. The analysis reveals a considerable thematic, structural and rhetorical similarity between the websites and a high presence of neoliberal ideology.  相似文献   

Youth Protests against Education Privatization Reforms in Post-Soviet States     

Iveta Silova  Viktoriia Brezheniuk  Marina Kudasova  Olga Mun  Nikolai Artemev 《欧洲教育》2014,46(3):75-99

This article examines youth protests against education privatization in the post-Soviet countries of Latvia, Russia, and Ukraine. Drawing on a sample of online sources and scholarly articles, this study uses critical discourse analysis and visual methodologies to examine why and how post-Soviet university students have organized to protest against education privatization reforms. The study also critically analyzes visual and discursive representations of youth protests by government officials, mass media, and academia in the post-Soviet education space. The study reveals that while student protesters are deeply concerned about the future of public education, the messages (and images) generated by youth protesters are reappropriated in various ways by mass media, often beyond the control of protesters themselves.  相似文献   

Academic inbreeding and publication activities of Russian faculty     

Alipova  Olga  Lovakov  Andrey 《Tertiary Education and Management》2018,24(1):66-82

The literature on the consequences of academic inbreeding shows ambiguous results: some papers show that inbreeding positively influences research productivity measured by the quantity and quality of publications, while others demonstrate the opposite effect. There are contradictory results both in the studies of different countries and within countries. This variety of results makes it impossible to transfer the findings from one academic system to another, and in Russia this problem has been under-explored. This paper focuses on the relationship between inbreeding and publication activity among Russian faculty. The research was conducted using data from the ‘Monitoring of Educational Markets and Organizations’ survey. The results show that there is no significant effect of academic inbreeding on publication productivity: no substantial and robust differences in publication activity between inbreds and non-inbreds have been found. The paper finishes with a discussion of possible explanations inherent in the Russian academic system.  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   

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   

Aerodynamic behaviour of single sport jersey fabrics with different roughness and cover factors     

Luca Oggiano  Olga Troynikov  Inna Konopov  Aleksandar Subic  Firoz Alam 《Sports Engineering》2009,12(1):1-12

Wind tunnel testing has been carried out on nine-knitted single jersey fabrics (100% polyester) using cylinder and leg models to determine its aerodynamic behaviour over a range of speeds (20–80 km/h) representative of sports activities. Strong correlation between fabric manufacturing (cover factor) and fabric roughness and aerodynamic parameters has been established. Similar aerodynamic behaviour of fabrics was observed when tested on the cylinder model and on the leg model.  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