Hydrodynamic self-focusing in a parallel microfluidic device through cross-filtration     

S. Torino  M. Iodice  I. Rendina  G. Coppola  E. Schonbrun 《Biomicrofluidics》2015,9(6)

The flow focusing is a fundamental prior step in order to sort, analyze, and detect particles or cells. The standard hydrodynamic approach requires two fluids to be injected into the microfluidic device: one containing the sample and the other one, called the sheath fluid, allows squeezing the sample fluid into a narrow stream. The major drawback of this approach is the high complexity of the layout for microfluidic devices when parallel streams are required. In this work, we present a novel parallelized microfluidic device that enables hydrodynamic focusing in each microchannel using a single feed flow. At each of the parallel channels, a cross-filter region is present that allows removing fluid from the sample fluid. This fluid is used to create local sheath fluids that hydrodynamically pinch the sample fluid. The great advantage of the proposed device is that, since only one inlet is needed, multiple parallel micro-channels can be easily introduced into the design. In the paper, the design method is described and the numerical simulations performed to define the optimal design are summarized. Moreover, the operational functionality of devices tested by using both polystyrene beads and Acute Lymphoid Leukemia cells are shown.  相似文献   

Three ideas to advance our research base     

I. Diane Cooper 《Journal of the Medical Library Association》2015,103(4):169-170

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D'Où Venons Nous/Que Sommes Nous/Où Allons Nous(Where Do We Come From? What Are We? Where Are We Going?)     

I. Diane Cooper 《Journal of the Medical Library Association》2015,103(1):55-56

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Parental mediation during the U.S. 2016 presidential election campaign: How parents criticized,restricted, and co-viewed news coverage     

Amy I. Nathanson  William P. Eveland Jr. 《Communication monographs》2019,86(2):184-204

Presidential election campaigns provide opportunities for parents to socialize their children to become politically engaged citizens. However, news coverage of the 2016 U.S. presidential campaign contained inappropriate content, leading parents to possibly restrict or denigrate rather than encourage child campaign news consumption. This study built on literatures in political socialization and parental mediation to explore mediation of campaign news coverage. Data from a representative sample of American parents during the Autumn of 2016 revealed that co-viewing, active mediation, and restrictive mediation were relatively common. The predictors of mediation included political variables, parenting orientations, and child factors, with the latter two often interacting with one another. The results have implications for how we conceptualize both political socialization and parental mediation.  相似文献   

Is the term ‘serials’ relevant any longer? Some thoughts on the matter…     

Eleanor I. Cook  Regina Romano Reynolds 《Learned Publishing》2019,32(1):85-89

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#MeToo,sexual harassment: an article,a forum,and a dream for the future     

Robin Patric Clair  Nadia E. Brown  Debbie S. Dougherty  Hannah K. Delemeester  Patricia Geist-Martin  William I. Gorden 《Journal of Applied Communication Research》2019,47(2):111-129

#MeToo has breathed new life into the women’s movement and especially into understanding and rectifying sexual harassment, abuse and assault. It has galvanized activists around the globe. And it has placed thousands of stories of the harassed in full view of the public. Sexual harassment, abuse and assault may occur within the organizational context or beyond; but sexual harassment, in particular has been legally labeled an organizational phenomenon. With this in mind, Robin Clair frames the early part of this article around the most recent organizational communication theories (see the appendix for an overview of these theories). Following the essay is a forum, in which invited scholars address questions related to the #MeToo movement.  相似文献   

Dewey and Video Games: From Education through Occupations to Education through Simulations          下载免费PDF全文

David I. Waddington 《Educational theory》2015,65(1):1-20

Critics like Leonard Waks argue that video games are, at best, a dubious substitute for the rich classroom experiences that John Dewey wished to create and that, at worst, they are profoundly miseducative. Using the example of Fate of the World, a climate change simulation game, David Waddington addresses these concerns through a careful demonstration of how video games can recapture some of the lost potential of Dewey's original program of education through occupations. Not only do simulation games realize most of the original goals of education through occupations, but they also solve some of the serious practical problems that Dewey's curriculum generated. Waddington concludes the essay with an analysis of Waks's critiques and some cautionary notes about why it is important to be temperate in our endorsement of educational video gaming.  相似文献   

Enhancing large-class teaching: a systematic comparison of rich-media materials     

F.C. Saunders  I. Hutt 《高等教育研究与发展》2015,34(6):1233-1250

Large cohorts (>200 students) are an ever-increasing presence in the UK higher education (HE) sector. Providing excellent teaching and learning to these large classes is an ongoing challenge for teaching faculty, a challenge intensified when the cohort comprises 85% non-native English speakers. This paper presents the findings of a project to supplement face-to-face lectures on a large campus-based taught MSc programme with a set of rich-media materials. These resources consisted of audio podcasts, audio-narrated slides, short video segments and full-video lecture capture. The aim of the study was to examine student usage of, and preference for, these different rich-media materials. Key findings are that students valued most highly the full-video lecture capture followed by the audio-narrated slides, using the materials primarily to consolidate their understanding and as revision aids. Students also emphasised the central importance of the face-to-face lecture – viewing the rich-media materials as complementary to, rather than as a replacement for the traditional lecture. Nor did the majority of students see the provision of videoed lectures as a reason for non-attendance at lectures. The findings of this study provide confirmatory evidence of the ongoing importance of the traditional lecture in large cohort HE teaching together with an acknowledgement of the benefits that rich-media materials can bring to the student learning experience.  相似文献   

Developing a dynamic inference expert system to support individual learning at work          下载免费PDF全文

Yu Hsin Hung  Chun Fu Lin  Ray I. Chang 《British journal of educational technology : journal of the Council for Educational Technology》2015,46(6):1378-1391

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Growth mindset and reading proficiency of ESL learners: examining the role of students’ socioeconomic status using PISA 2018 Philippine data     

Bernardo  Allan B. I. 《European Journal of Psychology of Education - EJPE》2023,38(2):675-693

European Journal of Psychology of Education - The growth mindset, or the belief that intelligence can be increased with effort, has been shown to be positively associated with improved learning...  相似文献