Programmed sample delivery on a pressurized paper

This paper reports a method to control the fluid flow in paper-based microfluidic devices simply by pressing over the channel surface of paper, thereby decreasing the pore size and permeability of a non-woven polypropylene sheet. As a result, fluid resistance is increased in the pressed region and causes flow rate to decrease. We characterize the decrease of flow rate with respect to different amounts of pressure applied, and up to 740% decrease in flow velocity was achieved. In addition, we demonstrate flow rate control in a Y-shaped merging paper and sequential delivery of multiple color dyes in a three-branched paper. Furthermore, sequential delivery of multiple fluid samples is performed to demonstrate its application in multi-step colorimetric immunoassay, which shows a 4.3-fold signal increase via enhancement step.     

Optofluidic microvalve-on-a-chip with a surface plasmon-enhanced fiber optic microheater

We present an optofluidic microvalve utilizing an embedded, surface plasmon-enhanced fiber optic microheater. The fiber optic microheater is formed by depositing a titanium thin film on the roughened end-face of a silica optical fiber that serves as a waveguide to deliver laser light to the titanium film. The nanoscale roughness at the titanium-silica interface enables strong light absorption enhancement in the titanium film through excitation of localized surface plasmons as well as facilitates bubble nucleation. Our experimental results show that due to the unique design of the fiber optic heater, the threshold laser power required to generate a bubble is greatly reduced and the bubble growth rate is significantly increased. By using the microvalve, stable vapor bubble generation in the microchannel is demonstrated, which does not require complex optical focusing and alignment. The generated vapor bubble is shown to successfully block a liquid flow channel with a size of 125 μm × 125 μm and a flow rate of ∼10 μl/min at ∼120 mW laser power.     

The social stratification of theatre,dance and cinema attendance

In current sociological literature the relationship between social inequality and patterns of cultural taste and consumption is the subject of a large and complex debate. In this paper the primary aim is to examine, in the light of empirical results from a research project in which the authors are presently engaged, three main, and rival, positions that have been taken up in this debate, here labelled as the ‘homology’, the ‘individualization’ and the ‘omnivore–univore’ arguments. Elsewhere, we have concentrated on musical consumption in England, and find evidence that is broadly supportive of the omnivore–univore argument. Here we ask whether such findings are confirmed in the case of theatre, dance and cinema attendance. A secondary aim of the paper is to bring to the attention of practitioners in the field of cultural policy and administration the need to address the issues that arise through the use of more powerful methods of data analysis than those often applied in the past. We explain how indicators of theatre, dance and cinema attendance derived from the Arts in England survey of 2001 can be subject to analysis so as to reveal two distinctive patterns of attendance and, in turn, two distinctive types of consumer—who can, it turns out, be regarded as omnivores and univores, even if with some qualification. The former have relatively high rates of attendance at all kinds of the events covered, including musicals and pantomimes as well as plays and ballet, while the latter tend to be cinema-goers only, that is, non-consumers of theatre and dance. A range of measures of social inequality are then introduced into the authors' analyses, including separate measures of social class and social status and also of educational level and income, and it is further shown that, again in conformity with the omnivore–univore argument, these two types of consumer are socially stratified. Omnivores are of generally higher social status than univores and also have usually higher levels of education and higher income than do univores (the latter finding marking the main difference with musical consumption, which was unaffected by income once other stratification variables were controlled). In sum, our results for theatre, dance and cinema attendance lend, overall, further support to the omnivore–univore argument as against its rivals, but also indicate that different aspects of social inequality impact on different forms of cultural consumption in varying degrees and probably through largely separate processes.     

EFFECTS OF ATTENTION TO CAMPAIGN COVERAGE ON POLITICAL TRUST

This study examines whether or not attention to campaign newsinfluences political trust. It also explores whether politicaltrust predicts attention to campaign news, and whether the mechanismof influence between attention to campaign news and politicaltrust differs across educational levels. Political trust wasoperationalized as trust in government. The 1992 American NationalElection Survey data were used. Results of two-stage least squaresanalysis show that attention to television campaign coveragereduced trust in government, while a low level of trust in governmentincreased attention to newspaper campaign coverage. More importantly,the mechanism of influence between political trust and attentionto campaign coverage differed across educational levels. Amongthe less educated, attention to campaign coverage on televisionled to lower levels of trust. Among the more educated, a lowlevel of trust in government increased attention to campaigncoverage. The findings also indicate that the types of media(television vs. newspapers) matter when it comes to media effectson political trust, Implications of findings on the relationshipsbetween the concepts of political trust, vigilant skepticism,education, and media use are discussed.     

TEACHING READING COMPREHENSION TO LEARNERS WITH AUTISM SPECTRUM DISORDER: PREDICTORS OF TEACHER SELF‐EFFICACY AND OUTCOME EXPECTANCY

Learners with autism spectrum disorder (ASD) often exhibit difficulty in the area of reading comprehension. Research connecting the learning needs of individuals with ASD, existing effective practices, teacher training, and teacher perceptions of their own ability to teach reading comprehension is scarce. Quantitative survey methodology and hierarchical regression analysis were utilized to investigate teacher preparedness to use effective practices, along with the job‐related factors of experience, administrator support, learner verbal ability, and instructional setting, as predictors of (1) teacher perceived self‐efficacy and (2) teacher perceived outcome expectancy teaching reading comprehension to learners with ASD. Study findings, based on 112 teacher participants, indicate that teachers with a higher confidence in using effective practices have both a higher perception of their own ability to teach comprehension (self‐efficacy), and a higher expectation of their own ability to increase instructional outcomes in learners with ASD (outcome expectancy). Implications for practice include professional development recommendations and provision of ongoing support from principals and administrators.