New detection method for rolling element and bearing defects

Instrument for detecting defects in rolling elements of bearings is described. Detection depends on rate at which rolling elements impact defect and establishes envelope amplitude of ball resonant frequency. Block diagram of instrument is provided and results obtained in conducting tests are reported

A system for early warning of bearing failure

System for detecting incipient failure in ball bearings is described. Ultrasonic equipment detects bearing system resonance and provides warning signal through electronic circuitry. Detector can be used to evaluate performance of newly installed bearings. Schematic diagram is provided to show components

Design and fabrication of prototype system for early warning of impending bearing failure

Ball bearing performance tests run on several identical ball bearings under a variety of load, speed, temperature, and lubrication conditions are reported. Bearing temperature, torque, vibration, noise, strain, cage speed, etc., were monitored to establish those measurements most suitable as indicators of ball bearing health. Tape records were made under steady-state conditions of a variety of speeds and loads. Sample sections were selected for narrowband spectral analysis with a real time analyzer. An artificial flow was created across the inner race surface of one bearing using an acid etch technique to produce the scratch. Tape records obtained before and after established a characteristic frequency response that identifies the presence of the flow. The signals found most useful as indicators of performance degradation were ultrasonic outputs

Design and test of a pump failure anticipator

Tests were conducted on two different types of pumps in order to refine the concept and to finalize design details of a positive displacement internal gear pump and a shroudless centrifugal pump. A concept and a system that could be used with pumps to allow a rapid judgement to be made of the suitability of the pump for futher service is developed. Test results and detailed data analysis are included

Demonstrating cultural competence within health-visiting practice: working with refugee and asylum-seeking families

This qualitative study explored the experiences of health visitors working with refugee and asylumseeking families in central London, and assessed the dimensions of their cultural competency using Quickfall's model (Quickfall, 2004, 2010). In-depth interviews were conducted with 14 health visitors. Data were analysed using Framework, a thematicbased analytical method. The findings revealed that the health visitors demonstrated aspects of culturally competent care in relation to Quickfall's five-step model which was developed from the literature specifically for working with asylum applicants within a primary care setting. Shortcomings with regard to demonstrating cultural competence were related to working for an organisation whose work is governed by external factors such as national legislation and policy. In addition, the complexity of the needs of these vulnerable populations and limited resources sometimes compromised the cultural competence of the health visitors. However, they showed many positive xamples of how they provided equity, access and non-discriminatory services, health promotion and socially inclusive services

Fashion and passion: marketing sex to women

Against a backdrop of a ‘pornographication’ of mainstream media and the emergence of a more heavily sexualized culture, women are increasingly targeted as sexual consumers. In the UK, the success of TV shows like Sex and the City and the ‘fashion ‘n’ passion’ of sex emporia like Ann Summers suggests that late twentieth century discourses which foregrounded female pleasure have crystallised in a new form of sexual address to women. This article examines how sex products are being marketed for female consumers, focussing on the websites of sex businesses such as Myla, Babes n Horny, Beecourse, tabooboo and Ann Summers. It asks how a variety of existing discourses – of fashion, consumerism, bodily pleasure and sexuality - are drawn on in the construction of this new market, how they negotiate the dangers and pleasures of sexuality for women, and what they show about the construction of ‘new’ female sexualities.</p

The Total Synthesis of Natural Products via Cascade Reactions

The discipline of natural product synthesis serves to provide a platform for reaction discovery, the development of unique methodology, elucidation of biochemical pathways and structure conformation. This thesis will explore some bio-inspired cascade reactions towards the synthesis of the busseihydroquinone (chapter two), rhodonoid (chapter three), rubiginosin (chapter four) and nyingchinoid (chapter five) families of natural products, through the synthesis and derivatization of chromenes (Scheme 1).1 Efforts towards the total synthesis of the indole alkaloid (±)-hinckdentine A will also be explored (chapter Six).Thesis (Ph.D.) -- University of Adelaide, School of Physical Sciences, 202

Inferring the age and sex of ancient potters from fingerprint ridge densities: A data-driven, Bayesian mixture modelling approach

The density of epidermal ridges in a fingerprint varies predictably by age and sex. Archaeologists are therefore interested in using recovered fingerprints to learn about the ancient people who produced them. Recent studies focus on estimating the age and sex of individuals by measuring their fingerprints with one of two similar metrics: mean ridge breadth (MRB) or ridge density (RD). Yet these attempts face several critical problems: expected values for adult females and adolescent males are inherently indistinguishable, and inter-assemblage variation caused by biological and technological differences cannot be easily estimated. Each of these factors greatly decreases the accuracy of predictions based on individual prints, and together they condemn this strategy to relative uselessness. However, information in fingerprints from across an assemblage can be pooled to generate a more accurate depiction of potter demographics. We present a new approach to epidermal ridge density analysis using Bayesian mixture models with the following key benefits: Age and sex are estimated more accurately than existing methods by incorporating a data-driven understanding of how demographics and ridge density covary. Uncertainty in demographic estimates is automatically quantified and included in output. The Bayesian framework can be easily adapted to fit the unique needs of different researchers. </p