预应力混凝土路面设计准则研究

对混凝土路面板施加预应力,可显著提高其承载能力,因而相同荷载下板厚可减小.预应力改变了路面板的结构形式,可抵抗更大的冲击、振动和超载.本文讨论了设计预应力混凝土路面的要点,提出了预测预应力路面早期、使用阶段及开裂后压应力的设计步骤.必须清楚区分反复荷载和非反复荷载中的变量,同样需要检查预应力路面在超载下开裂后的恢复情况.文末附一个设计实例说明该方法的应用.,With a concrete pavement slab prestressed, its load-carrying capacity can be significantly increased, thus a thinner slab may be used for the same loading. Prestressing modify the structural behavior of the pavement slab and there is a greater resistance to impact, vibration and overloading. This paper discusses the major design considerations necessary in the successful construction of prestressed concrete pavements and presents a design procedure developed to predict the compressive stress due to prestressing in the pavements at early stage, during service and after cracking. Variation in the approach for repetitive and nonrepetitive loads is clearly distinguished. Check on the recovery after cracking for overloading in prestressed pavements is also needed. Finally, a design example is illustrated the application of the approach developed.     

Cognitive Attributes,Attention, and Self‐Efficacy of Adequate and Inadequate Responders in a Fourth Grade Reading Intervention

We examined cognitive attributes, attention, and self‐efficacy of fourth grade struggling readers who were identified as adequate responders (n = 27), inadequate responders with comprehension only deficits (n = 46), and inadequate responders with comprehension and word reading deficits (n = 52) after receiving a multicomponent reading intervention. We also included typical readers (n = 40). These four groups were compared on measures of nonverbal reasoning, working memory, verbal knowledge, listening comprehension, phonological awareness, and rapid naming as well as on teacher ratings of attention problems and self‐reported self‐efficacy. The two inadequate responder groups demonstrated difficulties primarily with verbal knowledge and listening comprehension compared to typical readers and adequate responders. Phonological awareness and rapid naming differentiated the two inadequate responder groups. In addition, both inadequate responder groups showed more attention problems and low self‐efficacy compared to typical readers.     

Mapping the Final Frontier: A Publisher’s Experience Launching an Open Access Journal in the Burgeoning Mixed Access Economy

This article describes a program session that focused on publishers’ experiences launching Open Access (OA) journals and lessons learned. The speakers discussed the current journal marketplace, current journal business models, and the possible shape of the OA landscape and marketplace in the future.     

‘It’s a bit of a generalisation,but …’: participant perspectives on intercultural group assessment in higher education

This paper reports on domestic and international students’ perceptions of the influence of group diversity on communication, learning, task performance and assessment grades. The study’s methodology involved quantitative and qualitative analysis of surveys (N?=?312), focus group interviews of students (n?=?26) and individual staff interviews (N?=?7). More domestic (79%) than international (29%) students stated that they preferred working with students from a similar background. While a proportion of the sample of domestic students stated that intercultural group work raised their awareness of interaction styles in other cultures, others noted that the group experience was negatively affected by issues related to language proficiency and awareness of academic requirements. Qualitative analysis reveals that ‘othering’, a process by which members of an in group (Us) distance themselves from an outgroup (Them), was often used as a basis for these students avoiding intercultural group assessment. Finally, there was a clear pattern overall of higher achieving international and domestic students perceiving that their grades for group assignments were below what they would normally receive for individual assignments, and lower achieving students perceiving that their grades were higher for group assignments.     

Creative graduate pathways within and beyond the creative industries

This special issue explores the nuances of graduate creative work, the kinds of value that creative graduates add through work of various types, graduate employability issues for creative graduates, emerging and developing creative career identities and the implications for educators who are tasked with developing a capable creative workforce. Extant literature tends to characterise creative careers as either ‘precarious’ and insecure, or as the engine room of the creative economy. However, in actuality, the creative workforce is far more heterogeneous than either of these positions suggest, and creative careers are far more complex and diverse than previously thought. The task of creative educators is also much more challenging than previously supposed. In this introductory article, we commence by providing a brief overview of the creative labour debates, and the evidence for each position. We present the latest literature in this area that starts to speak to how diverse and complex the landscape of creative work actually is. We then introduce each of the articles in this special issue and indicate how they contribute to a more multi-faceted picture of creative activity, and the lives and career trajectories of graduates from creative degrees.     

Navigating the turbulent waters of academia: the leadership role of programme managers

Tertiary Education and Management - The focus of our paper is the leadership role of programme managers in the higher education sector. In particular, we highlight the complex and paradoxical...     

An optically transparent membrane supports shear stress studies in a three-dimensional microfluidic neurovascular unit model

We report a microfluidic blood-brain barrier model that enables both physiological shear stress and optical transparency throughout the device. Brain endothelial cells grown in an optically transparent membrane-integrated microfluidic device were able to withstand physiological fluid shear stress using a hydrophilized polytetrafluoroethylene nanoporous membrane instead of the more commonly used polyester membrane. A functional three-dimensional microfluidic co-culture model of the neurovascular unit is presented that incorporates astrocytes in a 3D hydrogel and enables physiological shear stress on the membrane-supported endothelial cell layer.