Amplitude and frequency control of a vibratory pile driver

Abstract—This paper describes the digital control of a vibratory pile driver in which the vibration is generated via two tandem pairs of electrically driven, geared, contra-rotating eccentrics. Experimental results are included to show the controller-induced system dynamics for a variety of load condtions, and to highlight the fact that, if the relative phase of the eccentric pairs is not controlled, the natural tendency at high excitation frequency is for the pile driver to operate with a low vibration amplitude. An analytical technique for identifying the system parameters is presented, and analytical performance predictions are compared with experimental results. Analysis of the power flow in the system shows that, although significant power transfer occurs between the two electrical drives, the net power dissipation during pile driving is relatively low

Medical Investigation and Documentation of Torture: A Handbook for Health Professionals

This Handbook is primarily aimed at raising awareness of relevant medical ethical, legal and professional standards of the many health professionals who would wish to do the most conscientious job, with a view to helping victims of torture and contributing to efforts to eliminate the practice. The key task is to establish the most scientifically valid documentation concerning possible torture of individuals, consistent with the often difficult conditions under which the work sometimes has to be undertaken. It is inspired by The Istanbul Protocol, approved by United Nations bodies, which lays down the best professional standards for physicians working in the field. Yet it recognises that not all health professionals called on to do the work will have extensive experience in this field and it presents the material in a way that aims to be accessible to all these professionals. Guidance is given in the general skills of interviewing, as well as the medical examination and documentation. In addition to the relevant ethical and legal principles, the Handbook also points to sources of advice for those who wish to further their knowledge or gain support and advice on particular situations

Studying Biofilm and Clinical Issues in Orthopedics

The association between biofilm-forming microorganisms and prosthetic joint infection influences all aspect of management including approaches to diagnosis, management and prevention. This article will provide an overview of new anti-biofilm strategies for management of prosthetic joint infection

Quantitative assessment of relative ship strike risk to humpback whales (Megaptera novaeangliae) in the Great Barrier Reef World Heritage Area

The Australian east coast population of humpback whales (E1 sub-population) annually migrate to the Great Barrier Reef for mating and calving. Recent improvements in our understanding of the distribution of humpback whales on their breeding ground in the Great Barrier Reef World Heritage Area (GBRWHA) indicate the main breeding aggregation (highest density area) is in offshore waters of the southern GBR, in close proximity to coastal areas undergoing significant port development. The core breeding area overlaps the inner shipping route that services all ports on the Qld coast. A quantitative assessment of relative ship strike risk (ships > 80m) to humpback whales in the GBRWHA was recently undertaken. However, it was not possible to model the Capricorn Bunker Group due to limited humpback whale distribution data. This Capricorn Bunker Group is an area of significant shipping activity and represents a significant information gap on relative risk of ship strike to humpback whales in the GBR. This report presents data on the distribution of humpback whales in the Capricorn Bunker Group area from an aerial survey undertaken in July 2018. This data enabled a quantitative relative ship strike risk assessment for this area and a re-assessment of risk in the extended GBRWHA when integrated with existing aerial survey data

The RaRE Research Report: LGB&T Mental Health – Risk and Resilience Explored

The RaRE Study research project 2010 – 2015 is a 5-year collaboration between PACE, the LGBT+ mental health charity and an academic panel drawn from three UK universities, the University of Worcester, Brunel University London and London South Bank University

Risk and resilience: exploring the potential of LGBTQ third sector and academic partnership

The Risk and Resilience Explored [RaRE] Project (2010–2016) was a collaborative process involving a third sector agency, university partners and volunteers to better understand the risk and resilience factors associated with specific mental health issues among lesbian, gay, bisexual, trans, and queer (LGBTQ) people. In this article, we discuss the project’s collaborative ethos, based on a Community-Based Participatory Research (CBPR) approach. We explain how the CBPR approach benefitted from including academic partners from the onset of the project, as well as from the direct and indirect engagement of community volunteers. We then explore some of our experience of third sector and academic partner collaboration in more depth, highlighting topic summaries salient to this partnership: support and continuity, upskilling of staff and volunteers for mutual benefit, accessible communication across sectors, and aligning priorities. We conclude by setting out recommendations based on our experience for those interested in developing similarly collaborative projects

Community detection in networks without observing edges

We develop a Bayesian hierarchical model to identify communities of time series. Fitting the model provides an end-to-end community detection algorithm that does not extract information as a sequence of point estimates but propagates uncertainties from the raw data to the community labels. Our approach naturally supports multiscale community detection as well as the selection of an optimal scale using model comparison. We study the properties of the algorithm using synthetic data and apply it to daily returns of constituents of the S&P100 index as well as climate data from US cities

Exploring LGBT resilience and moving beyond a deficit-model: findings from a qualitative study in England

The aim of this study is to critique and extend psychological approaches to resilience by examining retrospective accounts of LGBT people in England who had directly experienced or witnessed events that were salient as significantly negative or traumatic. Pre-screening telephone interviews identified ten individuals who matched inclusion criteria (mean age: 39 years; range 26–62 years) as part of a larger study. Interviews were semi-structured and informed by a literature review undertaken at the start of the study. We identified three themes of that extend the resilience literature for LGBTQ+ people: (1) identifying and foregrounding inherent personal traits – how non-contextual inborn qualities or attributes needed external effort to be recognised and operationalised; (2) describing asymmetric sources of social support and acceptance – the importance of positive environment is unequally available to LGBT people compared to heterosexuals, and uneven within the LGBT group; and (3) blurring distinctions between resilience and coping – experiential approaches to moving beyond distress. We suggest that narratives of resilience in the accounts of LGBT people can inform the development of resilience promotion models for minoritized individuals and support movement away from deficit-focused approaches to health policy