COLD-SAT dynamic model

This report discusses the development and underlying mathematics of a rigid-body computer model of a proposed cryogenic on-orbit liquid depot storage, acquisition, and transfer spacecraft (COLD-SAT). This model, referred to in this report as the COLD-SAT dynamic model, consists of both a trajectory model and an attitudinal model. All disturbance forces and torques expected to be significant for the actual COLD-SAT spacecraft are modeled to the required degree of accuracy. Control and experimental thrusters are modeled, as well as fluid slosh. The model also computes microgravity disturbance accelerations at any specified point in the spacecraft. The model was developed by using the Boeing EASY5 dynamic analysis package and will run on Apollo, Cray, and other computing platforms

Interference patterns: Literary study, scientific knowledge, and disciplinary autonomy after the two cultures

This project interrogates the claims made for the possibility of collapsing all the various disciplines into one discipline, probably physics, and surely a science, in the name of making clearer the relations between our various fields of knowledge. This is the aim of the radical reductionist, and I take E. O. Wilson's Consilience as exemplary of such attempts. Central to Wilson's method of achieving unity is the new science of evolutionary psychology - itself a re-working of the sociobiology with which Wilson first achieved notoriety. In the on-going project of explaining culture under a Darwinian description, the evolutionary psychologists have begun to suggest explanations for the popularity and content of narrative fiction. Because they are consonant with the rest of science, these biologistic accounts of fiction might be preferable to the accounts traditionally offered by Literary Studies. Consequently, there is a risk that the traditional practices of Literary Studies will be made redundant within the academy and gradually atrophy. The demand is that Literary Studies either makes itself rigorous like the sciences (as with such projects as Northrop Frye's Anatomy of Criticism), or else forfeit its claims to produce knowledge. Aware of this threat, some literary critics embrace forms of relativism in an attempt to deny the unity or effectiveness of scientific knowledge and so neuter the threatened takeover. Among these forms of relativism, Richard Rorty's account seeks to collapse the hierarchy of disciplines and seemingly offers Literary Studies a means of retaining its distinctive approach without denying the effectiveness of scientific knowledge. I aim to show that Literary Studies need not become a science, and that such sciences as evolutionary psychology are neither as threatening as some had feared, nor as useful to literary study as some have hoped

Discriminating between a Stochastic Gravitational Wave Background and Instrument Noise

The detection of a stochastic background of gravitational waves could significantly impact our understanding of the physical processes that shaped the early Universe. The challenge lies in separating the cosmological signal from other stochastic processes such as instrument noise and astrophysical foregrounds. One approach is to build two or more detectors and cross correlate their output, thereby enhancing the common gravitational wave signal relative to the uncorrelated instrument noise. When only one detector is available, as will likely be the case with the Laser Interferometer Space Antenna (LISA), alternative analysis techniques must be developed. Here we show that models of the noise and signal transfer functions can be used to tease apart the gravitational and instrument noise contributions. We discuss the role of gravitational wave insensitive "null channels" formed from particular combinations of the time delay interferometry, and derive a new combination that maintains this insensitivity for unequal arm length detectors. We show that, in the absence of astrophysical foregrounds, LISA could detect signals with energy densities as low as $\Omega_{\rm gw} = 6 \times 10^{-13}$ with just one month of data. We describe an end-to-end Bayesian analysis pipeline that is able to search for, characterize and assign confidence levels for the detection of a stochastic gravitational wave background, and demonstrate the effectiveness of this approach using simulated data from the third round of Mock LISA Data Challenges.Comment: 10 Pages, 10 Figure

Marketing professionals\u27 perceptions of personally branded wesites

Marketing professionals are increasingly recognizing the internet as a channel for branding themselves and their expertise in an increasingly competitive landscape. In this context, the study of personal branding in the online arena has become more relevant than ever before. This in-depth study observes the perceptions of 20 marketing professionals to websites set up by experts and consultants attempting to brand themselves online. Using personal construct theory the study identifies ten themes and 35 sub categories. These include the ability of the site to relate personally to the visitor, design and aesthetics, site presence and updatedness and sales pressure amongst others

Model fitting for small skin permeability data sets: hyperparameter optimisation in Gaussian Process Regression

This is the pre-peer reviewed version of the following article: Parivash Ashrafi, Yi Sun, Neil Davey, Roderick G. Adams, Simon C. Wilkinson, and Gary Patrick Moss, ‘Model fitting for small skin permeability data sets: hyperparameter optimisation in Gaussian Process Regression’, Journal of Pharmacy and Pharmacology, Vol. 70 (3): 361-373, March 2018, which has been published in final form at https://doi.org/10.1111/jphp.12863. Under embargo until 17 January 2019. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.Objectives The aim of this study was to investigate how to improve predictions from Gaussian Process models by optimising the model hyperparameters. Methods Optimisation methods, including Grid Search, Conjugate Gradient, Random Search, Evolutionary Algorithm and Hyper-prior, were evaluated and applied to previously published data. Data sets were also altered in a structured manner to reduce their size, which retained the range, or ‘chemical space’ of the key descriptors to assess the effect of the data range on model quality. Key findings The Hyper-prior Smoothbox kernel results in the best models for the majority of data sets, and they exhibited significantly better performance than benchmark quantitative structure–permeability relationship (QSPR) models. When the data sets were systematically reduced in size, the different optimisation methods generally retained their statistical quality, whereas benchmark QSPR models performed poorly. Conclusions The design of the data set, and possibly also the approach to validation of the model, is critical in the development of improved models. The size of the data set, if carefully controlled, was not generally a significant factor for these models and that models of excellent statistical quality could be produced from substantially smaller data sets.Peer reviewedFinal Accepted Versio

The National Arts Education Archive: Ideas and Imaginings

The National Arts Education Archive (NAEA) is housed and maintained by the Yorkshire Sculpture Park (YSP), and managed by YSP coordinators and educators with a well-established volunteer programme. This year, 2017, as part of the celebrations of the YSP’s 40th anniversary, the Archive will hold its own exhibition entitled Treasures Revealed: a collection of items selected by people who have been involved in the Archive, whether as donors, volunteers, researchers, artists, trustees or steering group members. In parallel with the exhibition, this article aims to give voice to a selection of individuals and groups associated with the Archive, discussing their interests and experiences of it, and their thoughts on its value and importance as a repository of arts education materials, ideals and practices. Our primary motivations were to consider these different voices in relation to the purpose, direction and relevance of the NAEA today. These exchanges raise fundamental questions and debates about what art education is and what it might become, and how these historical collections, and creative engagements with it, might help to shape our contemporary thinking

Principles of practice in mental health assessment with Aboriginal Australians

In this chapter, concepts and history of assessment and testing in the context of Aboriginal and Torres Strait Islander social and emotional wellbeing and mental health are discussed. Importantly, recently revised diagnostic guidelines and the National Practice Standards for the Mental Health Workforce 20131 and their appropriateness for meeting the distinctive needs of Aboriginal people are reviewed. Various assessment tools and measures that have been validated or proved appropriate for use with particular Aboriginal populations, i.e. youth, women and older people, are described. We conclude that practitioners need to be critically reflective in their role in assessment, and position themselves to play an important transformative role in conducting assessment. This extends to acknowledging and enacting culturally responsive principles, procedures and practices to ensure that Aboriginal people have access to effective, culturally secure mental health care

Organizational communication and awareness: a novel solution for health informatics

As organizations grow larger and more distributed, the problems of maintaining corporate awareness and effective communication channels escalate. The clinical domain poses particular challenges to maintaining good corporate communications because users have limited time to access information and often have negative technology perceptions. This paper highlights how a screen saver application, initially designed to increase privacy and security, developed into a new communication medium improving corporate communication across the organization. An ethnographic study of the application within a hospital setting, analyzed using grounded theory methods, details the iterative and organic development of the design through ‘community of practice’ involvement. This application was found to not only increase awareness of resources, activities and hospital changes but also positively influence users’ perceptions of, involvement in and ownership of general IT developments. User involvement also raised the importance, for the designers, of application usability, quality and aesthetics. As well as strengths, application limitations are discussed; we also identify further research and developments required if this approach is to realize its full potential