Academic Achievement of Students withEmotional and Behavioural Disorders:A Review of the Research

Although students with emotional and behavioural disorders often have academic defi cits, the interventions provided for these students usually focus on their behaviour. The result may be that the academic needs of this population are neglected and possibly increase due to neglect. While the research is inconclusive, it suggests that there may be a reciprocal relationship between poor academic achievement and problem behaviour. Without early and effective intervention, students with emotional and behaviour disabilities (EBD) are likely to be at risk for poor academic as well as psychosocial outcomes. The purpose of this review is threefold: (a) to review the recent research on the academic achievement, particularly reading achievement, of students with EBD; (b) to describe the current classroom instruction provided to students with EBD; and (c) to review the research on what constitutes effective instructional practice for this population. The paper closes with recommendations for future research

Rings of tautological forms on moduli spaces of curves

We define and study a natural system of tautological rings on the moduli spaces of marked curves at the level of differential forms. We show that certain 2-forms obtained from the natural normal functions on these moduli spaces are tautological. Also we show that rings of tautological forms are always finite dimensional. Finally we characterize the Kawazumi-Zhang invariant as essentially the only smooth function on the moduli space of curves whose Levi form is a tautological form.Comment: 32 page

The Influence of Base Oil Properties on the Friction Behaviour of Lithium Greases in Rolling/Sliding Concentrated Contacts

This study investigates the influence of base oil type and viscosity on the frictional behaviour of lithium-thickened bearing greases. A series of model lithium greases were manufactured by systematically varying viscosity and type of base oil, so that the influence of a single base oil property could be studied in isolation. In addition, selected greases were blended with oleic acid, with the purpose of evaluating its effectiveness in further reducing grease friction. Friction coefficient and film thickness were measured in laboratory ball-on-disc tribometers over a range of speeds and temperatures. For a specific oil type, the influence of base oil viscosity on friction was found to be closely related to its effect on film thickness: greases formulated with PAO oils covering a wide range of viscosities gave very similar friction at the same nominal film thickness. For a given base oil viscosity, base oil type was found to have a strong influence on grease friction under all test conditions. PAO-based greases generally produced lower friction than mineral- and ester-based greases. Addition of oleic acid to the test greases did not significantly affect friction within the range of test conditions employed in this study. The results provide new insight into the frictional behaviour of greases, which may be used to help inform new low-friction grease formulations for rolling bearing applications

Segmentation of Intracranial Arterial Calcification with Deeply Supervised Residual Dropout Networks

Intracranial carotid artery calcification (ICAC) is a major risk factor for stroke, and might contribute to dementia and cognitive decline. Reliance on time-consuming manual annotation of ICAC hampers much demanded further research into the relationship between ICAC and neurological diseases. Automation of ICAC segmentation is therefore highly desirable, but difficult due to the proximity of the lesions to bony structures with a similar attenuation coefficient. In this paper, we propose a method for automatic segmentation of ICAC; the first to our knowledge. Our method is based on a 3D fully convolutional neural network that we extend with two regularization techniques. Firstly, we use deep supervision (hidden layers supervision) to encourage discriminative features in the hidden layers. Secondly, we augment the network with skip connections, as in the recently developed ResNet, and dropout layers, inserted in a way that skip connections circumvent them. We investigate the effect of skip connections and dropout. In addition, we propose a simple problem-specific modification of the network objective function that restricts the focus to the most important image regions and simplifies the optimization. We train and validate our model using 882 CT scans and test on 1,000. Our regularization techniques and objective improve the average Dice score by 7.1%, yielding an average Dice of 76.2% and 97.7% correlation between predicted ICAC volumes and manual annotations.Comment: Accepted for MICCAI 201

Work-Based Education as a Pathway to Resilience

The purpose of this study was to explore the potential of work-based education (WBE) as a pathway for enhancing resilience among youth-at-risk for disengaging from school. For students who have experienced traditional academic school as an adverse context, the decision to pursue an alternative path to high school completion, for example WBE, can be interpreted as agentic. We propose that WBE may have the requisite features of an educational context that fosters resilience in at-risk youth. We used a multipleperspective case study method involving three young people in their final stages of secondary school. The students were the focal participants in each case. Each was interviewed and observed on multiple occasions. We interviewed teachers and workplace supervisors associated with each student for additional perspectives. Cases were analyzed individually, followed by cross-case analyses utilizing a resilience framework. Our study revealed evidence that for the three youth we studied, WBE had many elements that appear to enhance resilience in a way that academic programs did not. WBE kept these students engaged in the school context and contributed to the eventual successful completion of secondary school for all three. Choosing WBE as a pathway to secondary school completion can be an agentic act by at-risk youth to achieve graduation. Engagement in WBE also appears to enhance resilience. WBE may foster resilience in at-risk youth, who despite academic adversity, progress to completion. Graduation from secondary school is frequently identified as a positive outcome and a predictor of success in productive occupation and adult life

Contribution of viscous shear to friction in cold rolling of low-carbon steel

This work shows that for temperatures, pressures and shear rates that are common in cold rolling of low-carbon steel, viscous shear stress significantly contributes to the total friction force. Experiments were carried out to validate the theory on lubricant film formation and elasto-hydrodynamic lubrication, both with laboratory scale tribometers and a semi-industrial pilot mill facility. These experiments showed that at high shear rates, that are common in cold rolling, the lubricant does not behave as a Newtonian fluid anymore; moreover the viscosity at high pressure cannot accurately be described by a simple exponential law. With the correct relations implemented in a rolling model, both rolling force and forward slip are predicted with good accuracy for hydrodynamically lubricated cold rolling experiments.</p

Agricultural Experiment Station News July 1970

CONTENTS: FROM THE DIRECTOR\u27S DESK DEPARTMENTAL HOUSEKEEPING AND EQUIPMENT REVIEW PERSONNEL ACTIONS GRANTS AND CONTRACTS GENERAL NOTES NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS – JULY 197