scholarly journals Beyond Cherub-- A Library and English Department Collaborate to Encourage Diverse Reading

Author(s):  
Erin Wamala

During this session, Erin will be presenting our lower secondary program for diverse reading. The aim of this program is to introduce students to a wide range of texts featuring a variety of characters, authors, settings, and perspectives. This program is supplementary to the core English program. It encourages students to read widely for pleasure, to explore different ideas, and representations and to be able to discuss and give their opinions on the books they have read.

Author(s):  
John Joseph Norris ◽  
Richard D. Sawyer

This chapter summarizes the advancement of duoethnography throughout its fifteen-year history, employing examples from a variety of topics in education and social justice to provide a wide range of approaches that one may take when conducting a duoethnography. A checklist articulates what its cofounders consider the core elements of duoethnographies, additional features that may or may not be employed and how some studies purporting to be duoethnographies may not be so. The chapter indicates connections between duoethnography and a number of methodological concepts including the third space, the problematics of representation, feminist inquiry, and critical theory using published examples by several duoethnographers.


Author(s):  
Marios Patinios ◽  
James A. Scobie ◽  
Carl M. Sangan ◽  
J. Michael Owen ◽  
Gary D. Lock

In gas turbines, hot mainstream flow can be ingested into the wheel-space formed between stator and rotor disks as a result of the circumferential pressure asymmetry in the annulus; this ingress can significantly affect the operating life, performance, and integrity of highly stressed, vulnerable engine components. Rim seals, fitted at the periphery of the disks, are used to minimize ingress and therefore reduce the amount of purge flow required to seal the wheel-space and cool the disks. This paper presents experimental results from a new 1.5-stage test facility designed to investigate ingress into the wheel-spaces upstream and downstream of a rotor disk. The fluid-dynamically scaled rig operates at incompressible flow conditions, far removed from the harsh environment of the engine which is not conducive to experimental measurements. The test facility features interchangeable rim-seal components, offering significant flexibility and expediency in terms of data collection over a wide range of sealing flow rates. The rig was specifically designed to enable an efficient method of ranking and quantifying the performance of generic and engine-specific seal geometries. The radial variation of CO2 gas concentration, pressure, and swirl is measured to explore, for the first time, the flow structure in both the upstream and downstream wheel-spaces. The measurements show that the concentration in the core is equal to that on the stator walls and that both distributions are virtually invariant with radius. These measurements confirm that mixing between ingress and egress is essentially complete immediately after the ingested fluid enters the wheel-space and that the fluid from the boundary layer on the stator is the source of that in the core. The swirl in the core is shown to determine the radial distribution of pressure in the wheel-space. The performance of a double radial-clearance seal is evaluated in terms of the variation of effectiveness with sealing flow rate for both the upstream and the downstream wheel-spaces and is found to be independent of rotational Reynolds number. A simple theoretical orifice model was fitted to the experimental data showing good agreement between theory and experiment for all cases. This observation is of great significance as it demonstrates that the theoretical model can accurately predict ingress even when it is driven by the complex unsteady pressure field in the annulus upstream and downstream of the rotor. The combination of the theoretical model and the new test rig with its flexibility and capability for detailed measurements provides a powerful tool for the engine rim-seal designer.


2018 ◽  
Vol 18 (1) ◽  
pp. 3-48
Author(s):  
LMBC Campos ◽  
C Legendre

In this study, the propagation of waves in a two-dimensional parallel-sided nozzle is considered allowing for the combination of: (a) distinct impedances of the upper and lower walls; (b) upper and lower boundary layers with different thicknesses with linear shear velocity profiles matched to a uniform core flow; and (c) a uniform cross-flow as a bias flow out of one and into the other porous acoustic liner. The model involves an “acoustic triple deck” consisting of third-order non-sinusoidal non-plane acoustic-shear waves in the upper and lower boundary layers coupled to convected plane sinusoidal acoustic waves in the uniform core flow. The acoustic modes are determined from a dispersion relation corresponding to the vanishing of an 8 × 8 matrix determinant, and the waveforms are combinations of two acoustic and two sets of three acoustic-shear waves. The eigenvalues are calculated and the waveforms are plotted for a wide range of values of the four parameters of the problem, namely: (i/ii) the core and bias flow Mach numbers; (iii) the impedances at the two walls; and (iv) the thicknesses of the two boundary layers relative to each other and the core flow. It is shown that all three main physical phenomena considered in this model can have a significant effect on the wave field: (c) a bias or cross-flow even with small Mach number [Formula: see text] relative to the mean flow Mach number [Formula: see text] can modify the waveforms; (b) the possibly dissimilar impedances of the lined walls can absorb (or amplify) waves more or less depending on the reactance and inductance; (a) the exchange of the wave energy with the shear flow is also important, since for the same stream velocity, a thin boundary layer has higher vorticity, and lower vorticity corresponds to a thicker boundary layer. The combination of all these three effects (a–c) leads to a large set of different waveforms in the duct that are plotted for a wide range of the parameters (i–iv) of the problem.


Author(s):  
Marios Patinios ◽  
James A. Scobie ◽  
Carl M. Sangan ◽  
J. Michael Owen ◽  
Gary D. Lock

In gas turbines, hot mainstream flow can be ingested into the wheel-space formed between stator and rotor discs as a result of the circumferential pressure asymmetry in the annulus; this ingress can significantly affect the operating life, performance and integrity of highly-stressed, vulnerable engine components. Rim seals, fitted at the periphery of the discs, are used to minimise ingress and therefore reduce the amount of purge flow required to seal the wheel-space and cool the discs. This paper presents experimental results from a new 1.5-stage test facility designed to investigate ingress into the wheel-spaces upstream and downstream of a rotor disc. The fluid-dynamically-scaled rig operates at incompressible flow conditions, far removed from the harsh environment of the engine which is not conducive to experimental measurements. The test facility features interchangeable rim-seal components, offering significant flexibility and expediency in terms of data collection over a wide range of sealing-flow rates. The rig was specifically designed to enable an efficient method of ranking and quantifying the performance of generic and engine-specific seal geometries. The radial variation of CO2 gas concentration, pressure and swirl is measured to explore, for the first time, the flow structure in both the upstream and downstream wheel-spaces. The measurements show that the concentration in the core is equal to that on the stator walls and that both distributions are virtually invariant with radius. These measurements confirm that mixing between ingress and egress is essentially complete immediately after the ingested fluid enters the wheel-space and that the fluid from the boundary-layer on the stator is the source of that in the core. The swirl in the core is shown to determine the radial distribution of pressure in the wheel-space. The performance of a double radial-clearance seal is evaluated in terms of the variation of effectiveness with sealing flow rate for both the upstream and the downstream wheel-spaces and is found to be independent of rotational Reynolds number. A simple theoretical orifice model was fitted to the experimental data showing good agreement between theory and experiment for all cases. This observation is of great significance as it demonstrates that the theoretical model can accurately predict ingress even when it is driven by the complex unsteady pressure field in the annulus upstream and downstream of the rotor. The combination of the theoretical model and the new test rig with its flexibility and capability for detailed measurements provides a powerful tool for the engine rim-seal designer.


2007 ◽  
Vol 6 (2) ◽  
pp. 18-24
Author(s):  
K. Prabakkar Rajkumar

The United Nations has designated the year 2005 as the "International year of Micro-Credit". The Micro Finance (MF) initiatives of NABARD have evolved as a sustainable social movement over a decade by now. The design and content of these innovations have remained dynamic in tandem with the changing needs of the micro finance sector in the Country. These initiatives have attracted the attention of a wide range of stakeholders. Large number of formal and informal agencies has joined the NABARD in this unique process of soda-economic engineering. The relevance of the micro finance programme was greatly enhanced the interest of all participants through the core strategies of SHG — bank linkage, which was built around a simple but basic aspect of human nature — the feeling of self-worth.


Humans are becoming increasingly reliant on interconnected technologies to go about their daily lives in the personal and professional spheres. From finding romance, to conducting businesses entirely online, receiving health services, shopping, banking, and gaming, the Internet and World Wide Web open up a world of possibilities to people across the globe. Understanding the psychological processes underlying and influencing the thinking, interpretation, and behavior associated with this online interconnectivity is the core premise of Cyberpsychology. This book explores a wide range of cyberpsychological processes and activities through the research and writings of some of the world’s leading cyberpsychology experts. The book covers a broad range of topics spanning the key areas of research interest in this emerging field of enquiry and will be of interest to those who have only recently discovered the discipline as well as more seasoned cyberpsychology researchers and teachers. The book contains eight sections, and includes contributions spanning the breadth of current academic and public interest. Topics include: online research methods, self-presentation and impression management, technology across the lifespan, interaction and interactivity, online groups and communities, social media, health and technology, video gaming, and cybercrime and cybersecurity.


2014 ◽  
Vol 31 (2) ◽  
pp. 291-325
Author(s):  
Jean-Faustin Badimboli Atibasay

The development of biotechnology, which promises many economic opportunities, has revived the debate over the ownership of biological resources and its derivatives, as well as the sharing of the benefits which derive from its multiple applications. At the core of the debate, is the recent marriage between intellectual property rights (IPR) and international trade, within the framework of the World Trade Organization (WTO). In this context, the need of developed countries to prevent trade distortions due to the lack of adequate IPR protection in developing countries, is weighed against the need to promote local interests in these countries. However, the legal impact of recent multilateral agreements, which address biological innovations, is still subject to controversy. An assessment of these instruments reveals divergent approaches to the issues which divide the parties concerned. This results in ambiguities and conflicts with respect to relevant provisions of these agreements. From a wide range of possible solutions discussed, industrial and developing countries might consider to review the disputed provisions in a way that attempts to harmonise the agreements and render legal implications of their respective initiatives in this area more predictable.


2016 ◽  
Vol 113 (21) ◽  
pp. E2906-E2915 ◽  
Author(s):  
Vicente José Planelles-Herrero ◽  
Florian Blanc ◽  
Serena Sirigu ◽  
Helena Sirkia ◽  
Jeffrey Clause ◽  
...  

Myosins containing MyTH4-FERM (myosin tail homology 4-band 4.1, ezrin, radixin, moesin, or MF) domains in their tails are found in a wide range of phylogenetically divergent organisms, such as humans and the social amoeba Dictyostelium (Dd). Interestingly, evolutionarily distant MF myosins have similar roles in the extension of actin-filled membrane protrusions such as filopodia and bind to microtubules (MT), suggesting that the core functions of these MF myosins have been highly conserved over evolution. The structures of two DdMyo7 signature MF domains have been determined and comparison with mammalian MF structures reveals that characteristic features of MF domains are conserved. However, across millions of years of evolution conserved class-specific insertions are seen to alter the surfaces and the orientation of subdomains with respect to each other, likely resulting in new sites for binding partners. The MyTH4 domains of Myo10 and DdMyo7 bind to MT with micromolar affinity but, surprisingly, their MT binding sites are on opposite surfaces of the MyTH4 domain. The structural analysis in combination with comparison of diverse MF myosin sequences provides evidence that myosin tail domain features can be maintained without strict conservation of motifs. The results illustrate how tuning of existing features can give rise to new structures while preserving the general properties necessary for myosin tails. Thus, tinkering with the MF domain enables it to serve as a multifunctional platform for cooperative recruitment of various partners, allowing common properties such as autoinhibition of the motor and microtubule binding to arise through convergent evolution.


Author(s):  
Stuart Sims ◽  
Wilko Luebsen ◽  
Chris Guggiari-Peel

Throughout the REACT project, the core institutions of Winchester, Exeter and London Metropolitan have been conducting an in-depth, multi-faceted evaluation of selected co-curricular student engagement activities – ‘Student Fellows’, ‘Change Agents’ and ‘Peer-Assisted Student Success’ respectively. This involved the collection of survey data to explore key concepts related to the motivations of students to participate in these initiatives. This survey explores areas including employability, academic study and partnership, with an aim of improving co-curricular initiatives to make them more inclusive of ‘hard to reach’ students. These ‘motivations’ to participate are used to contextualise data about the attainment and continuation of active student participants. Rather than seek to assert or confirm that various groups are ‘hard to reach’, this research seeks to understand better what does and does not make co-curricular activities inclusive of hard-to-reach students. In this sense, the aim is to have a greater understanding of how students are successfully ‘reached’. Discussion will focus on how attainment and retention can help us to explore whether a wide range of students is benefiting from participation.


2018 ◽  
Vol 33 ◽  
pp. 03032
Author(s):  
Irina Pocebneva ◽  
Vadim Belousov ◽  
Irina Fateeva

This article provides a methodical description of resource-time analysis for a wide range of requirements imposed for resource consumption processes in scheduling tasks during the construction of high-rise buildings and facilities. The core of the proposed approach and is the resource models being determined. The generalized network models are the elements of those models, the amount of which can be too large to carry out the analysis of each element. Therefore, the problem is to approximate the original resource model by simpler time models, when their amount is not very large.


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