A biologically inspired computational vision front-end based on a self-organised pseudo-randomly tessellated artificial retina

This paper considers the construction of a biologically inspired front-end for computer vision based on an artificial retina pyramid with a self-organised pseudo-randomly tessellated receptive field tessellation. The organisation of photoreceptors and receptive fields in biological retinae locally resembles a hexagonal mosaic, whereas globally these are organised with a very densely tessellated central foveal region which seamlessly merges into an increasingly sparsely tessellated periphery. In contrast, conventional computer vision approaches use a rectilinear sampling tessellation which samples the whole field of view with uniform density. Scale-space interest points which are suitable for higher level attention and reasoning tasks are efficiently extracted by our vision front-end by performing hierarchical feature extraction on the pseudo-randomly spaced visual information. All operations were conducted on a geometrically irregular foveated representation (data structure for visual information) which is radically different to the uniform rectilinear arrays used in conventional computer vision

Reflection in work-based learning: self-regulation or self-liberation?

This article considers the role of reflective practice in work-based learning in higher education. The benefits of using reflection for learning at work have been widely recognised and the pedagogy to support reflection is now established. However, the use of reflective practice has been subjected to considerable critique, and many of the criticisms draw on Michel Foucault's concepts of governmentality, pastoral power, confession and self-regulation. Drawing on our professional experiences of supporting students in undertaking reflection, we examine the general critique put forward. Having considered the case that reflection supports self-regulation in a way which disadvantages individuals while benefiting organisations, we argue that reflection can be used to empower individuals. We do this by drawing attention to the elements of Foucault's argument which include the importance of agency in the exercise of power

Understanding the Labour Market for Older Workers: A Survey

The paper asks why retirement can be so abrupt in countries such as France (½% of the workforce over 65), yet staged in Japan (8% over 65). We find part of the answer in tax laws that prevent people working and receiving a pension, and make little allowance for fair pension increases if retirement is deferred. While these laws have begun to change, we find another part of the answer in employment protection laws. These laws coupled with inflexible collectively agreed wages make employers choosy about hiring the old. The advent of "age discrimination" law reinforces employment protection and may well reduce older workers' hiring opportunities especially where wages are rigid.mandatory retirement, deferred pay, age discrimination, older workers

Conflicting values in reflection on professional practice

Purpose – The purpose of this paper is to examine the use of reflection as a tool of enquiry within the context of higher education work based learning. The aim of the study is to investigate how reflection on professional practice brings about a review of the values underpinning that practice. Design/methodology/approach – The data were collected from a group of undergraduate students undertaking their studies by work based learning in the area of management in a Scottish University. An open-ended questionnaire was designed to learn about the participants’ views on their perceived freedom to reflect on their workplace practice in the university, their ability to challenge the organizational values and established practices in the workplace, and on their relationship with the workplace mentor. Findings – Students on work based learning programmes are subjected to demands from at least three directions: first, their own expectations, in terms of both what they want to achieve by way of their own development, second, the needs of their organization; and third, expectations of the university in ensuring that the work produced meets the standard for an academic award. These interests can sometimes coincide, but they can also conflict, and such a conflict can reveal tensions that run deeper into the culture of the organization. Research limitations/implications – This study is based on a relatively small sample of learners in one university, hence the findings are of preliminary nature. Despite the small sample size, the conclusions are indicative of a potential problem in the design of work based learning, and a larger cross-institutional study would allow the validity of these results to be verified. Practical implications – The findings emerging from this study have implications for the facilitators of work based learning in higher education. Although university work based learning programmes differ significantly from corporate learning and development efforts, this paper suggests that work based learning providers should co-operate more closely with the learners’ employing organizations towards creating an environment for learning at work. More co-operation between the university and the employer might be more beneficial for all stakeholders. Originality/value – The literature on work based learning focuses in the main on the use of reflection as a tool of enquiry into workplace practice. Drawing on the study of contemporary work organizations, this paper explores the tensions arising from reflection on the learners’ practice, and possible conflict of values that reflection exposes. Keywords Professional practice, Reflection, Work based learning, Organizational practices, Corporate learning, HE management programmes, Employees, Personal and professional development

Recent X-ray observations of intermediate BL Lac objects

We present recent ROSAT, ASCA and SAX observations of intermediate BL Lac objects (IBLs), i.e. BL Lacs which are located between high-energy and low-energy peaked BL Lac objects with respect to alpha_rx. Both the statistical properties of IBLs from the RGB sample and a detailed broad band X-ray spectral analysis of two objects (1424+2401, 1055+5644) point towards a continuous distribution of synchrotron emission peak frequencies among BL Lac objects.Comment: 4 pages, 4 figures; to appear in the proceedings of the conference "BL Lac Phenomenon" held in Turku, Finland, June 22-26, 199

Level of adherence to prescribed exercise in spondyloarthritis and factors affecting this adherence: a systematic review

Adherence is a primary determinant of the effectiveness of any intervention. Exercise is considered essential in the management of spondyloarthritis (SpA); however, the overall adherence to exercise programmes and factors affecting adherence are unknown. The aim of this systematic review was to examine measures of, and factors influencing adherence to, prescribed exercise programmes in people with SpA. A search was performed in August 2018 using five data bases; the Cochrane library, CINAHL, EMBASE, MEDLINE, and Web of Science Collections. Inclusion criteria were: studies with adults (> 18 years) with SpA, with a prescribed exercise intervention or educational programme with the aim of increasing exercise participation. Article quality was independently assessed by two assessors. Extracted descriptive data included: populations, interventions, measures of adherence and factors affecting adherence. Percentage adherence rates to prescribed exercises were calculated if not reported. Nine studies were included with a total of 658 participants, 95% of participants had a diagnosis of ankylosing spondylitis. Interventions and measurement of adherence varied, making comparisons difficult. Rates of adherence ranged from 51.4 to 95%. Single studies identified; adherence improved following educational programmes, and higher disease severity and longer diagnostic delays were associated with higher adherence. Conflicting evidence was found as to whether supervision of exercise improved adherence. Three consecutive studies demonstrated adherence reduced over time. Adherence to prescribed exercise in SpA was poorly reported and predominately for people with AS. The levels of adherence and factors affecting prescribed exercise in SpA remain unclear. Future research should measure adherence across a longer time period and investigate possible factors which may influence adherence

Job Satisfaction and the Labor Market Institutions in Urban China

The determinants of worker job satisfaction are estimated using a representative survey of three major cities in China. Legally segregated migrants, floaters, earn significantly less than otherwise equivalent non-migrants but routinely report greater job satisfaction, a finding not previously reported. We confirm a positive role for membership in the communist party but find that it exists only for non-migrants suggesting a club good aspect to membership. In contrast to earlier studies, many controls mirror those found in western democracies including the "paradox of the contented female worker."job satisfaction, internal migrants, party membership, China

Unified S-Band Data Handling System

The data handling portion of the Unified S-Band tracking system consists of three readily separable subsystems. These are: a) the Timing System, b) the Antenna Position Programmer, and c) the Tracking Data Processor. Each of these subsystems is briefly described below