Lead plated aluminum ring provides static high pressure seal for large diameter pressure vessel

Lead plated aluminum ring provides a positive static seal for a large diameter pressure vessel for use in a hazardous environment at cryogenic temperatures with high pressure fluid flow. This design can be used in high and low pressure lines of any diameter for any fluid, with appropriate material modification

Electronics for a Martian water vapor detection system

Electronic circuitry for aluminum oxide detector of water content in Martian atmosphere and surfac

Locke, natural law and civil peace: Reply to Tate

In this comment, I reply to two objections John Tate raises against my discussion of the trajectory of Locke's ideas on toleration (in an earlier article published in EJPT, ‘Locke’s Tracts and the Anarchy of the Religious Conscience’) Tate maintains that I misunderstand the role of natural law and civil peace in Locke's thought. I defend my interpretation of the role of natural law and show that Tate is mistaken in his claim that Locke's concern to preserve civil peace conflicted with his separate concern to protect individual rights

You don't know what's around the corner: A qualitative study of professional footballers in England facing career-transition

Career transition in sport is a rapidly growing area within the field of sport psychology. Interest in this area has been fuelled by the need for an increased number of professional athletes seeking support and assistance during transition from sport. However, whilst research in this field has focused in on a wide range of sports, specific research on retirement in professional football has been limited. Because of this it is argued that current research may fail to consider specific issues associated with the transition from professional football. Therefore, in an attempt to add to the existing body of research the current study aimed to provide an in-depth insight into how professional footballers understand their ‘lived-world’ during exit from their sport. A total of eight former professional footballers, who were at the time experiencing the possibility of career-transition, were interviewed in two separate focus group discussions. The interviews were analysed using interpretive phenomenological analysis (IPA). The key findings from the research show that a lack of control over their lives, lack of pre-planning and preparation for retirement as well as support and ability to seek it led professional footballers to experience heightened levels of anxiety, uncertainty and fear for their futures as well as an unexpected sense of rejection during career transition. These findings have implications for support organisations and those interested in the life-long welfare of professional footballers. It is proposed that an emphasis on pre-planning and preparation, provisions of support and encouraging help-seeking may aid professional footballers during the process out of their sport

The game jam movement:disruption, performance and artwork

This paper explores the current conventions and intentions of the game jam - contemporary events that encourage the rapid, collaborative creation of game design prototypes. Game jams are often renowned for their capacity to encourage creativity and the development of alternative, innovative game designs. However, there is a growing necessity for game jams to continue to challenge traditional development practices through evolving new formats and perspectives to maintain the game jam as a disruptive, refreshing aspect of game development culture. As in other creative jam style events, a game jam is not only a process but also, an outcome. Through a discussion of the literature this paper establishes a theoretical basis with which to analyse game jams as disruptive, performative processes that result in original creative artefacts. In support of this, case study analysis of Development Cultures: a series of workshops that centred on innovation and new forms of practice through play, chance, and experimentation, is presented. The findings indicate that game jams can be considered as processes that inspire creativity within a community and that the resulting performances can be considered as a form of creative artefact, thus parallels can be drawn between game jams and performative and interactive art

Bourdieu, networks, and movements: Using the concepts of habitus, field and capital to understand a network analysis of gender differences in undergraduate physics

Current trends suggest that significant gender disparities exist within Science, Technology, Engineering, and Mathematics (STEM) education at university, with female students being underrepresented in physics, but more equally represented in life sciences (e.g., biology, medicine). To understand these trends, it is important to consider the context in which students make decisions about which university courses to enrol in. The current study seeks to investigate gender differences in STEM through a unique approach that combines network analysis of student enrolment data with an interpretive lens based on the sociological theory of Pierre Bourdieu. We generate a network of courses taken by around 9000 undergraduate physics students (from 2009 to 2014) to quantify Bourdieu's concept of field. We explore the properties of this network to investigate gender differences in transverse movements (between different academic fields) and vertical movements (changes in students' achievement rankings within a field). Our findings indicate that female students are more likely to make transverse movements into life science fields. We also find that university physics does a poor job in attracting high achieving students, and especially high achieving female students. Of the students who do choose to study physics, low achieving female students are less likely to continue than their male counterparts. The results and implications are discussed in the context of Bourdieu's theory, and previous research. We argue that in order to remove constraints on female student's study choices, the field of physics needs to provide a culture in which all students feel like they belong.Comment: 23 pages, 6 figures, 1 tabl

A Dynamic Model Investigation of the Effect of a Sharp-Edge Vertical Gust on Blade Periodic Flapping Angles and Bending Moments of a Two-Blade Rotor

A two-blade rotor having a diameter of 4 feet and a solidity of 0.037 was subjected to sharp-edge vertical gusts while being operated at various forward speeds to study the effect of the gusts on the blade periodic bending moments and flapping angles. Variables studied included gust velocity, collective pitch angle, flapping hinge offset, and tip-speed ratio. Dimensionless coefficients are derived for the periodic components of the incremental changes in blade flapping angles and bending moments which arise when a rotor blade penetrates a sharp-edge gust. Mental changes in both the flapping angles and bending moments are essentially proportional to gust velocity, and the coefficients express the ratio of these increments to gust velccity. The results show that the flapping coefficient usually increases with an increase in collective pitch angle, is generally dependent on tip-speed ratio, and is essentially independent of the amount of flapping hinge offset. The bending-moment coefficient is also dependent on collective pitch angle and tip-speed ratio. Expected reductions in bending moments are realized by the use of flapping hinges, and further reductions in bending moments are achieved as the amount of flapping hinge offset is increased. Comparison of the experimental results of this investigation with limited available theoretical results shows substantial agreement but indicates that the assumption that the response of the rotor to a sharp-edge gust is independent of the collective pitch angle prior to gust entry is probably inadequate

Tradition and Prudence in Locke's Exceptions to Toleration

Why did Locke exclude Catholics and atheists from toleration? Not, I contend, because he was trapped by his context, but because his prudential approach and practica ljudgments led him to traditiona ltexts. I make this argumentfirst by outlining the connections among prudential exceptionality, practical judgments, and traditional texts. I then describe important continuities betweenc onventional English understandings of the relationship between state and religion and Locke's writings on toleration, discuss Locke's conception of rights, and illustrate his use of prudential exceptions and distinctions. I conclude by arguing that Locke's problems are relevant to assessingc ontemporary liberal discussions of tolerationa nd the separation of state and religion that lean heavily on practical justification