Neural information retrieval: at the end of the early years     

Kezban Dilek Onal  Ye Zhang  Ismail Sengor Altingovde  Md Mustafizur Rahman  Pinar Karagoz  Alex Braylan  Brandon Dang  Heng-Lu Chang  Henna Kim  Quinten McNamara  Aaron Angert  Edward Banner  Vivek Khetan  Tyler McDonnell  An Thanh Nguyen  Dan Xu  Byron C. Wallace  Maarten de Rijke  Matthew Lease 《Information Retrieval》2018,21(2-3):111-182

A recent “third wave” of neural network (NN) approaches now delivers state-of-the-art performance in many machine learning tasks, spanning speech recognition, computer vision, and natural language processing. Because these modern NNs often comprise multiple interconnected layers, work in this area is often referred to as deep learning. Recent years have witnessed an explosive growth of research into NN-based approaches to information retrieval (IR). A significant body of work has now been created. In this paper, we survey the current landscape of Neural IR research, paying special attention to the use of learned distributed representations of textual units. We highlight the successes of neural IR thus far, catalog obstacles to its wider adoption, and suggest potentially promising directions for future research.  相似文献   

Why Do University Students Refrain from Using E-Books in Libraries? Empirical Evidence from Vietnam     

Thu Hang Hoang  Ninh Nguyen 《Publishing Research Quarterly》2018,34(4):568-572

E-books have increasingly penetrated the academic world. However, despite efforts from Vietnamese universities and colleges to establish and broaden their e-books collection, students seem reluctant to use these digital books. This study aims to examine the barriers to using e-books in libraries among Vietnamese students. Data were obtained from 355 undergraduate students who were interested in e-books. The findings demonstrate that some key barriers impeding students from using e-books include the lack of computers and e-books in libraries, limited information and knowledge about e-books and their preference of using print books. Interestingly, female students tend to perceive the barriers to be stronger than their male counterparts. This study’s findings have important implications for universities, libraries and publishers who seek to promote e-books to students.  相似文献   

Promoting the Purchase of Textbooks in the Vietnamese Higher Education Sector     

Thi Thu Hoai Phan  Tuan Khanh Cao  Thu Hang Hoang  Phuong Anh Vu  The Ninh Nguyen 《Publishing Research Quarterly》2018,34(1):89-95

Higher education textbooks sales account for a significant portion of the overall book market. This study makes an important contribution to the extant literature by examining students’ purchase of original textbooks in a developing market, Vietnam. Notably, it seeks to investigate why students do not purchase original textbooks as well as the difference in purchase behavior between different groups of students. The findings reveal that some key obstacles to students’ purchase behavior include high prices, insufficient availability, low perceived value, and the emergence of pirated textbooks. Another notable finding is that senior students who are female tend to purchase more textbooks. In light of these findings, marketing strategies are suggested for publishers, bookstores and universities who aim to promote the sales and consumption of original textbooks.  相似文献   

Public Opinion Polls,Chicken Soup and Sample Size     

Phung Nguyen 《Teaching Statistics》2005,27(3):89-92

Cooking and tasting chicken soup in three different pots of very different size serves to demonstrate that it is the absolute sample size that matters the most in determining the accuracy of the findings of the poll, not the relative sample size, i.e. the size of the sample in relation to its population.  相似文献   

Marketing International Scholarly Journals to Vietnamese Researchers     

The Ninh Nguyen  Hoang Viet Nguyen  Hoang Nguyen 《Publishing Research Quarterly》2017,33(4):471-476

There is a significantly growing interest in publishing in international scholarly journals in Vietnam. On the one hand, Vietnamese researchers can be potential authors of interesting articles that provide new insights into the emerging economic context. On the other hand, they can be target consumers and subscribers of journals in their quest for academic and practical knowledge. This paper aims to propose marketing initiatives for publishers and editors who seek to promote their journals to researchers in emerging countries, particularly Vietnam. These marketing solutions build upon an understanding of barriers for researchers in international publications.  相似文献   

垂直绿化综合效应研究     

Tang Van Tai  Tran Ngoc Binh  Nguyen Nhu Anh  Phan Hong Nhung 《黑龙江生态工程职业学院学报》2017,30(4)

除了美观上的效果,垂直绿化缓解热岛效应,减少水土流失,防尘减噪,节能环保,延长建筑寿命等作用也被越来越多的人意识到,有关垂直绿化各方面定性的研究也不断得到开展.以南京的三种墙面绿化形式—攀援式墙面绿化、铺贴式墙面绿化和组合移动式墙面绿化作为研究对象,通过测定垂直绿化的降温、减噪和心理效应探讨垂直绿化对建筑环境的综合影响.  相似文献   

Passive optical separation and enrichment of cells by size difference     

Hoi SK  Kim VH  Huy NM  Sow CH  Ow YS  Bettiol AA 《Biomicrofluidics》2010,4(4):44111

A size-selective cell sorting microfluidic device that utilizes optical force is developed. The device consists of a three-dimensional polydimethylsiloxane microstructure comprised of two crossed microchannels in a three-dimensional configuration. A line shaped focused laser beam is used for automatic size-selective cell sorting in a continuous flow environment. As yeast cells in an aqueous medium are fed continuously into a lower channel, the line shaped focused laser beam is applied (perpendicular to the direction of flow) at the junction of the two crossed channels. The scattering force of the laser beam was employed to push cells matching specific criteria upward from one channel to another. The force depends on the size of the cells, the laser power, and the fluid flow speed. The variation in size of yeast cells causes them to follow different routes at the intersection. For flow speeds below 30 μm∕s, all yeast cells larger than 3 μm were removed from the main stream. As a result, a high purity sample of small cells can be collected at the outlet of bottom channel.  相似文献   

Oxygen plasma treatment for reducing hydrophobicity of a sealed polydimethylsiloxane microchannel     

Tan SH  Nguyen NT  Chua YC  Kang TG 《Biomicrofluidics》2010,4(3):32204

Rapid prototyping of polydimethylsiloxane (PDMS) is often used to build microfluidic devices. However, the inherent hydrophobic nature of the material limits the use of PDMS in many applications. While different methods have been developed to transform the hydrophobic PDMS surface to a hydrophilic surface, the actual implementation proved to be time consuming due to differences in equipment and the need for characterization. This paper reports a simple and easy protocol combining a second extended oxygen plasma treatments and proper storage to produce usable hydrophilic PDMS devices. The results show that at a plasma power of 70 W, an extended treatment of over 5 min would allow the PDMS surface to remain hydrophilic for more than 6 h. Storing the treated PDMS devices in de-ionized water would allow them to maintain their hydrophilicity for weeks. Atomic force microscopy analysis shows that a longer oxygen plasma time produces a smoother surface.  相似文献   

Changing views of teachers and teaching in Vietnam     

Huong Nguyen Thi Mai  Christine Hall 《Teaching Education》2017,28(3):244-256

In order for Vietnam to seek better international integration into an increasingly globalised world, the Vietnamese Government has launched educational reforms requiring teachers to adopt ‘Western’ constructivist pedagogies. This paper reports on an action research study in a Vietnamese teacher training institution which found that Vietnamese student teachers were willing to accommodate and accept change and were often very enthusiastic about the ‘Western ideas’ of teaching and learning, but that their unquestioning respect for the authority of their tutors remained firmly fixed. The data also showed that the students’ tutors had a relatively limited exposure to the ‘Western theories’ and their implications and therefore did not model or demonstrate the theories effectively. The paper draws on these findings to argue that the focus for transforming Vietnamese teachers’ practice should be on promoting the responsibility of teacher educators to introduce student teachers to new ideas about the processes of teaching and learning. This strategy is likely to be more supportive of student teachers’ development as it allows them to separate the processes of teaching from culturally dominant beliefs about roles which are part of their established identities.  相似文献   

Effect of Ethanol Stress on Fermentation Performance of Saccharomyces cerevisiae Cells Immobilized on Nypa fruticans Leaf Sheath Pieces     

Hoang Phong Nguyen  Hoang Du Le  Van Viet Man Le 《Food Technology and Biotechnology》2015,53(1):96-101

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