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1.
Inverted Index Compression Using Word-Aligned Binary Codes 总被引:3,自引:1,他引:3
We examine index representation techniques for document-based inverted files, and present a mechanism for compressing them using word-aligned binary codes. The new approach allows extremely fast decoding of inverted lists during query processing, while providing compression rates better than other high-throughput representations. Results are given for several large text collections in support of these claims, both for compression effectiveness and query efficiency. 相似文献
2.
Robinson Clinton Vũ Tú Anh Thị 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2019,65(3):443-470
International Review of Education - In the multilingual environments of Africa, national literacy policies vary in terms of the attention they give to the roles and purposes of local, national and... 相似文献
3.
In June 2015, Melissa Harris-Perry infamously analogized the possibility of trans-Black identity to the reality of transgender identity. Such analogies happen often and are used mostly for the benefit of learning about a less familiar form of identity. Building from a recent article by Suthakaranm, Filsinger, and White (2013) that presented a compelling argument for the use of analogies as an experiential learning tool in multicultural education, we advance the conversation by distinguishing a particular form of analogies: identity analogies. We explore the benefits and challenges of utilizing identity analogies as a tool for multicultural educators within U.S. higher education. 相似文献
4.
The article reviews the social-educational theorization of the early Soviet psychologist L. S. Vygotsky (1896–1934) in the light of the impact of communicative globalization in educational practice. Vygotsky proposed four “genetic domains” for investigating higher cognitive processes: the phylogenetic (humans undergoing natural evolution), the cultural-historical (social activity of humans), the ontogenetic (individual lifespan), and the microgenetic (immediate events). Vygotskian sociocultural theory is widely used in educational research, especially Vygotsky’s notion of mediated development via tools and signs. Since Vygotsky, communicative globalization has transformed educational potentials. Nevertheless, provided adjustments are made to Vygotsky’s genetic method to incorporate time-space compression, the mutual presence of the genetic domains, and the glonacal heuristic, Vygotskian theory continues to be useful in socially-situated investigations of educational development and transformation, and opens another way into the global, for example investigation of the role of global mediation in learning. 相似文献
5.
Grisham W Schottler NA McCauley LM Pham AP Ruiz ML Fong MC Cui X 《CBE life sciences education》2011,10(2):222-230
Zebra finch song behavior is sexually dimorphic: males sing and females do not. The neural system underlying this behavior is sexually dimorphic, and this sex difference is easy to quantify. During development, the zebra finch song system can be altered by steroid hormones, specifically estradiol, which actually masculinizes it. Because of the ease of quantification and experimental manipulation, the zebra finch song system has great potential for use in undergraduate labs. Unfortunately, the underlying costs prohibit use of this system in undergraduate labs. Further, the time required to perform a developmental study renders such undertakings unrealistic within a single academic term. We have overcome these barriers by creating digital tools, including an image library of song nuclei from zebra finch brains. Students using this library replicate and extend a published experiment examining the dose of estradiol required to masculinize the female zebra finch brain. We have used this library for several terms, and students not only obtain significant experimental results but also make gains in understanding content, experimental controls, and inferential statistics (analysis of variance and post hoc tests). We have provided free access to these digital tools at the following website: http://mdcune.psych.ucla.edu/modules/birdsong. 相似文献
6.
Hoang Loc Phuoc Le Hieu Thanh Van Tran Hung Phan Thanh Chi Vo Duc Minh Le Phuong Anh Nguyen Dung The Pong-inwong Chakrit 《Education and Information Technologies》2022,27(3):4007-4035
Education and Information Technologies - Peer assessment has an important role in teaching and learning nowadays. However, the existing techniques tend to be limited due to a lack of a suitable... 相似文献
7.
Comprehension tests often compare accuracy on inferential versus literal questions and find inferential harder than literal, and poor comprehenders performing worse than controls. Difficulties in integration are assumed to be the reason. This research explores another reason—differences in memory for the passage information underlying the questions. Thirty-nine poor comprehenders and 39 controls were given multiple-paragraph passages, which they retold before answering questions. Retellings permitted assessing question accuracy as a function of memory for the text underlying each question. Inferential accuracy was poorer than literal, and the expected group effect was obtained. However, when text memory was perfect, group differences disappeared, indicating that poor comprehenders can generate inferences as well as controls, if they have the relevant information in memory. These findings show that text memory is crucial in distinguishing poor comprehension. 相似文献
8.
In this paper, we present an on-chip hand-powered membrane pump using a robust patient-to-chip syringe interface. This approach enables safe sample collection, sample containment, integrated sharps disposal, high sample volume capacity, and controlled downstream flow with no electrical power requirements. Sample is manually injected into the device via a syringe and needle. The membrane pump inflates upon injection and subsequently deflates, delivering fluid to downstream components in a controlled manner. The device is fabricated from poly(methyl methacrylate) (PMMA) and silicone, using CO2 laser micromachining, with a total material cost of ∼0.20 USD/device. We experimentally demonstrate pump performance for both deionized (DI) water and undiluted, anticoagulated mouse whole blood, and characterize the behavior with reference to a resistor-capacitor electrical circuit analogy. Downstream output of the membrane pump is regulated, and scaled, by connecting multiple pumps in parallel. In contrast to existing on-chip pumping mechanisms that typically have low volume capacity (∼5 μL) and sample volume throughput (∼1–10 μl/min), the membrane pump offers high volume capacity (up to 240 μl) and sample volume throughput (up to 125 μl/min). 相似文献
9.
Educational Research for Policy and Practice - This paper is motivated by the ongoing debate on university reform in Vietnam. In particular, there is a need to quantify the level of governmental... 相似文献
10.
The teaching and assessment of essay writing at primary schools throughout Vietnam is regulated by the Ministry of Education
and Training. The analytical error-recognition method of assessment, however, does not facilitate direct interpretation of
students’ writing competence. In this study, which involved samples of Grade 5 students in five provinces in Vietnam, a combination
of traditional and partial credit scoring rubrics was developed to enable data analysis using the Rasch model. Based on such
analysis, a continuum of writing ability at Grade 5 level was identified and a mastery level defined in terms of writing skills.
The study has implications for possible changes in future assessment and marking schemes. 相似文献