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This report studies the surface modification of cyclic olefin copolymer (COC) by 2-methacryloyloxyethyl phosphorylcholine (MPC) monomer using photografting technique for the purpose of biointerface applications, which demonstrate resistance to both protein adsorption and cell adhesion in COC-based microfluidic devices. This is essential because the hydrophobic nature of COC can lead to adsorption of specific compounds from biological fluids in the microchannel, which can affect the results during fluidic analysis and cause clogging inside the microchannel. A correlation was found between the irradiation time and hydrophobicity of the modified substrate. Static water contact angle results show that the hydrophilicity property of the MPC-grafted substrate improves with increasing irradiation time. The contact angle of the modified surface decreased to 20 ± 5° from 88 ± 3° for the untreated substrate. The surface characterization of the modified surface was evaluated using x-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR spectroscopy). Attenuated total reflection-FTIR and XPS results show the presence of the phosphate group (P-O) on modified COC substrates, indicating that the hydrophilic MPC monomer has successfully grafted on COC. Finally, it was demonstrated that cell adhesion and protein adsorption on the MPC modified COC specimen has reduced significantly. 相似文献
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Jena Barchas-Lichtenstein John Fraser Patti Parson Rebecca Joy Norlander Julia Griffin Nsikan Akpan 《Journalism Practice》2020,14(6):643-663
ABSTRACT This article—co-authored by a transdisciplinary team of social scientists and journalists in the United States—traces changes to the news landscape in recent decades, and asks: How are legacy media producers grappling with these new realities? As part of a four-year collaboration on young adult news consumption, we take a participatory action research approach to this question, tacking back and forth between newsroom concepts and anthropological ones in pursuit of a synthesis that strengthens both. Starting from anthropological frameworks of participation, the authors argue that broadcast videos typically position their audiences as overhearers rather than interlocutors, while the reverse is true for social media, and that these tendencies shape audience expectations. We find that many audiences have what we call poetic motivations: they are drawn to stories that exemplify their genre. For example, the participatory nature of social media genres translates well to a more candid style that can incorporate live questions and other direct participation. The study reported here focuses on STEM news, but many of the findings apply to news production in general. Our reflective methods can also be applied more widely in the field of journalism to synthesize perspectives from theory and practice. 相似文献
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The article processing charge (APC) is currently the primary method of funding professionally published open access (OA) peer‐reviewed journals. The pricing principles of 77 OA publishers publishing over 1,000 journals using APCs were studied and classified. The most commonly used pricing method is a single fixed fee, which can either be the same for all of a publisher's journals or individually determined for each journal. Fees are usually only levied for publication of accepted papers, but there are some journals that also charge submission fees. Instead of fixed prices, many publishers charge by the page or have multi‐tiered fees depending on the length of articles. The country of origin of the author can also influence the pricing, in order to facilitate publishing for authors from developing countries. 相似文献
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Affirmative consent (AC) is becoming the standard for sexual behavior between students. However, little is known about how college students interpret and practice AC. We conducted in-depth, semistructured interviews with a purposeful sample of 31 undergraduate students to understand students' perceptions of AC and how it was practiced in their sexual relationships.
Despite knowledge about AC, many student leaders thought that it was an unrealistic expectation for students. This suggests that college sexual health education needs to clearly articulate actions that are consistent with AC and indicate how these can be incorporated into students' sexual behavior. 相似文献
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Social competency deficits are a core feature of autism spectrum disorders (ASDs). During the past several decades, a number of social skill interventions for students with ASD have emerged. However, over the past five years, three converging issues have brought increased attention to the need for social competence programming: (1) increased ASD incidence rates, (2) inclusion and integration trends, and (3) recent No Child Left Behind Act requirement regarding use of evidence-based practices. This article discusses current best practices in enhancing the social competence of learners with ASD. To this end, a review of the literature was conducted to: (1) define key behaviors related to social competence targeted by common interventions and (2) identify the core components and targets that are essential for effective social competence interventions. Searches done by hand and electronically were conducted to identify empirical reviews or summaries of effective social competence interventions from preschool to early adulthood. Eight reviews that encompass typically developing as well as those that specifically target ASD were chosen. Results of the review identified eight primary behavior categories most frequently targeted by social interventions across preschool, elementary, and secondary age groups. Additional analysis identified 11 core components consistently identified in the reviews. Explanation of categories as well as implications for future research and practice are explored. 相似文献
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Within a counseling context, cognisance should be taken of differences in language and culture codes, problem presentation and interpretation, counseling expectations, problem solving methods, and views on the world, reality and self. In South Africa as elsewhere in the world, political activism and the disruption of individual life styles have direct implications for the life and world view of the Blacks, and therefore also for the counseling process itself. Rightfully or not, White counselors are often perceived as symbols of the Establishment, and the Black client is likely to impute all the negative experiences of oppression to the counselor.The effectiveness of cross-cultural counseling is most likely to be enhanced when the counselor can relate to the outlook on life of the client, using counseling modalities and defining goals consistent with the life experiences and cultural values of the client. In this regard the White counselor might very well make a detailed analysis of the philosophy, function and methods of the very influential indigeous mental health practitioners (witch doctors) within the Black system. The accommodation of these concepts within acknowledged Western psychological approaches, seems feasible. 相似文献
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Fred DERVIN Anu HÄRKÖNEN Mei YUAN Wan ZHANG Ning CHEN 《Frontiers of Education in China》2020,15(4):588
Research on international students’ experiences abroad has tended to rely on models of adjustment, integration and/or acculturation to describe their (mis-)encounters with different kinds of people (e.g., co-nationals, locals and other international students). This paper proposes to use the more fluid concepts of imaginaries and hospitality, leaving behind stages and phases of adaption and acculturation, and focusing on the influence of the Structure on their experiences. Based on a discursive pragmatic analysis of interview data with 20 international students at a top Chinese university, the authors review how the students describe the kind of hospitality experienced at this institution and the influence that it has on their (mis-)encounters. Culturalist, differentialist and essentialist imaginaries (static and fixed views of Chineseness) are often used to justify the lack of encounters and the “segregation” and somewhat “positive discrimination” that they experienced. However, the paper shows that, amongst others, the institutional hospitality management for international students leads to closed contexts of encounters and feelings of exclusion. Although the study serves as a case study and cannot be generalized to the many and varied experiences of international students in other universities in China, some recommendations are made to solve, at least in part, misconceptions about what interculturality and hospitality entail in the internationalization of higher education. 相似文献
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