Improvement of rectification effects in diffuser/nozzle structures with viscoelastic fluids

This paper reports the improvement of rectification effects in diffuser∕nozzle structures with viscoelastic fluids. Since rectification in a diffuser∕nozzle structure with Newtonian fluids is caused by inertial effects, micropumps based on this concept require a relatively high Reynolds numbers and high pumping frequencies. In applications with relatively low Reynolds numbers, anisotropic behavior can be achieved with viscoelastic effects. In our investigations, a solution of dilute polyethylene oxide was used as the viscoelastic fluid. A microfluidic device was fabricated in silicon using deep reactive ion etching. The microfluidic device consists of access ports for pressure measurement, and a series of ten diffuser∕nozzle structures. Measurements were carried out for diffuser∕nozzle structures with opening angles ranging from 15° to 60°. Flow visualization, pressure drop and diodicity of de-ionized water and the viscoelastic fluid were compared and discussed. The improvement of diodicity promises a simple pumping concept at low Reynolds numbers for lab-on-a-chip applications.     

Linear and orthogonal models of acculturation and its relations to cultural variables: An examination of the Suinn-Lew Asian Self-Identity Acculturation Scale (SL-ASIA)

The Suinn-Lew Asian Self-Identity Acculturation Scale (SL-ASIA) is the most widely used measure of acculturation for Asians. The purpose of the current study was twofold: First, the study explored the consistency of the SL-ASIA in characterizing Asian American men's level of acculturation - Asian-Identified, Western-Identified, Bicultural - using the items of the scale in orthogonal versus linear approaches. Second, the study examined the association between the two scoring methods and characteristics indicative of Asian culture—family allocentrism, loss of face, and affect intensity. An orthogonal approach suggests individuals may identify both with Asian and Western cultures, whereas a linear approach indicates an individual identifies with one culture at the expense of the other (e.g., high Asian, low Western identified). We examined the classification rates of these two methods using a large sample of Asian-American collegiate men (n = 521) and then within each ethnic subgroup of Asian men (e.g., Chinese, Japanese, Korean). Results suggested the two methods of characterizing men consistently diverged. Across the Asian subgroups, the overall agreement rates using linear and orthogonal methods were approximately at chance. Furthermore, significant correlations were observed among acculturation scoring methods and variables indicative of social integrity and family attitude. The implications for these findings and potential future directions for the study of acculturation are discussed.     

垂直绿化综合效应研究

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.     

Local synthesis of carbon nanotubes for direct integration in Si microsystems - design considerations

The integration of nanomaterials such as carbon nanotubes （CNTs） into microsystems is highly desirable, in order to make use of the unique nanomaterial properties in real devices. However, the CNTtomicrosystem integration is challenging to implement in a manufacturable, cost effective industrial process. This paper presents our work towards a process for making complete, integrated CMOS / MEMS systems with integrated CNT. We demonstrate the feasibility of the process, using roomtemperature process ing, lowcost equipment and consumables, and electrical control with automation possibilities. CNTs are directly integrated at the desired positions in the Si microsystem, forming closed Si / CNT / Si circuits. We explore different designs with the aim to obtain uniform and welldefined CNT synthesis conditions, and show that simplified designs can perform comparably to more complex ones. The Si / CNT / Si circuits obtained can show rectifying （Schottky like） or nearohmic behavior. Gas sensing possibilities are demonstrated, indicating the possibility of monitoring aging/ fermenting of food. Functionalization of CNTs is demon strated, using thermal evaporation of Sn and Pd, opening for selective and sensitive sensors for various gases and ana lytes. Detailed microscopic characterization of the obtained CNTs are presented.     

Love acts and revolutionary praxis: challenging the neoliberal university through a teaching scholars development program

ABSTRACT

There has been significant interest in developing academics through Teaching Scholar Development Programs across the USA, Canada, the UK, and more recently in Australia. At their core, such programs develop academics across teaching scholarship, leadership, promotion, and award opportunities, where universities reap the benefits of developing such a cadre of leaders. This paper pays witness to one such a program in an Australian university to highlight enactments of caring passionately. We use qualitative survey evaluation data, metaphor analysis and reflective practice to nuance the pleasures, passions and challenges of the lived experiences using phenomenological and metaphor lenses to describe our experiences. Metaphors provide powerful insights into the dimensions of experience as they open up how programs are perceived and experienced. Our paper disrupts traditional linear writing through rhizomatic, multivocal and multitextual encounters to challenge dominant authorial voicing. The academic identity work and emotional work required in the program is unfolded through evolving, experiencing and reflecting on the program to inform design and highlight what we have come to (re)value in our academic work when we come together to learn, share, and lead. We forge ways to be and become with and against neoliberal agendas that have choked the soul of ‘the university’ to evolve rich spaces and practices of/for reciprocity and kindness where not only learning can thrive, but where love acts – a much needed revolutionary praxis for our time.     

‘Responsibility in mobility’: international students and social responsibility

Enhancing the educational experience and social connectedness for international students is the responsibility of different involved parties among whom international students themselves and host institutions play a key role. However, the question of how the condition of cross-border mobility has shaped and re-shaped international students’ responsibility towards the home and host country and other social relationships that have been formed via their mobility experiences is often neglected. This paper examines the social nature of international students’ responsibility. It is derived from a research project funded by the Australian Research Council that includes fieldwork and semi-structured interviews with 155 staff and international students from 25 institutions in Australia over 4 years. Using positioning theory as a conceptual framework, the study shows that it is important to take into account the tangible aspects of transnational mobility in understanding international student responsibility rather than merely locating their responsibility in simple cultural, personal or institutional parameters. The study suggests the important roles of host institutions and community in creating conducive conditions and opportunities for international students to exercise responsibility as social members and intercultural learners. Enhancing student social responsibility and capacity for enacting responsibility is essential for nurturing meaningful transnational citizenship.     

Interpersonal Neural Synchrony During Father–Child Problem Solving: An fNIRS Hyperscanning Study

Interpersonal neural synchrony (INS) has been previously evidenced in mother–child interactions, yet findings concerning father–child interaction are wanting. The current experiment examined whether fathers and their 5- to 6-year-old children (N = 66) synchronize their brain activity during a naturalistic interaction, and addressed paternal and child factors related to INS. Compared to individual problem solving and rest, father–child dyads showed increased INS in bilateral dorsolateral prefrontal cortex and left temporo-parietal junction during cooperative problem solving. Furthermore, the father’s attitude toward his role as a parent was positively related to INS during the cooperation condition. These results highlight the implication of the father’s attitude to parenting in INS processes for the first time.