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Full-Text Articles in Social and Behavioral Sciences

Integrated Condition Monitoring And Prognosis Method For Incipient Defect Detection And Remaining Life Prediction Of Low Speed Slew Bearings, Wahyu Caesarendra, Tegoeh Tjahjowidodo, Buyung Kosasih, Anh Kiet Tieu Jan 2017

Integrated Condition Monitoring And Prognosis Method For Incipient Defect Detection And Remaining Life Prediction Of Low Speed Slew Bearings, Wahyu Caesarendra, Tegoeh Tjahjowidodo, Buyung Kosasih, Anh Kiet Tieu

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents an application of multivariate state estimation technique (MSET), sequential probability ratio test (SPRT) and kernel regression for low speed slew bearing condition monitoring and prognosis. The method is applied in two steps. Step (1) is the detection of the incipient slew bearing defect. In this step, combined MSET and SPRT is used with circular-domain kurtosis, time-domain kurtosis, wavelet decomposition (WD) kurtosis, empirical mode decomposition (EMD) kurtosis and the largest Lyapunov exponent (LLE) feature. Step (2) is the prediction of the selected features' trends and the estimation of the remaining useful life (RUL) of the slew bearing. In …


Evaluation Of Inorganic Arsenic Exposure At Multi Metal Processing Facility. When Air Monitoring Alone Just Doesn't Work!, Stuart J. Roseberg, Jane L. Whitelaw Jan 2016

Evaluation Of Inorganic Arsenic Exposure At Multi Metal Processing Facility. When Air Monitoring Alone Just Doesn't Work!, Stuart J. Roseberg, Jane L. Whitelaw

Faculty of Social Sciences - Papers (Archive)

Metals smelting and processing has been associated with exposure to airborne inorganic arsenic and an increased risk of health effects. Biological monitoring on a metals processing site identified urinary arsenic concentrations exceeding corporate and ACGIH guidelines at levels associated with increased risks of health effects. Plant operators considered the inhalation of arsenic trioxide powder (As2O3), used in the process, as the source of their exposure. This study's initial objective was to determine operator exposures to airborne inorganic arsenic. Two groups of plant operators participated in full shift personal air monitoring and biological monitoring over their working weeks. In parallel, wipe …


A Traffic Monitoring System For A Mixed Traffic Flow Via Road Estimation And Analysis, Nguyen Viet Hung, Le Chung Tran, Nguyen Hoang Dung, Thang Manh Hoang, Nguyen Tien Dzung Jan 2016

A Traffic Monitoring System For A Mixed Traffic Flow Via Road Estimation And Analysis, Nguyen Viet Hung, Le Chung Tran, Nguyen Hoang Dung, Thang Manh Hoang, Nguyen Tien Dzung

Faculty of Engineering and Information Sciences - Papers: Part A

A Traffic Monitoring System (TMS) is the most important element in the Intelligent Transportation Systems (ITS), especially in a developing country like Vietnam with a mixed traffic flow of vehicles including motocycles and cars. A traffic flow varies in different daytime, therefore the adoption of the TMS for an adaptive control of the traffic light timing is very essential. The proposed TMS system uses one CCD camera mounted to view from the rear of moving vehicles appearing in a distance from a viewed span of the camera to the stopline of the cross-roads, which is denoted by L and statistically …


Diesel Exhaust Pollution: Chemical Monitoring And Cytotoxicity Assessment, Lucky Joeng, Shahnaz Bakand, Amanda Hayes Jan 2015

Diesel Exhaust Pollution: Chemical Monitoring And Cytotoxicity Assessment, Lucky Joeng, Shahnaz Bakand, Amanda Hayes

Faculty of Social Sciences - Papers (Archive)

Diesel engines are a significant source of nitrogen oxides (NOx) and particulate matter (PM) which may cause adverse health effects on the cardiovascular and pulmonary systems. There is little consistency between many studies to establish which engine parameter is a key factor to determine the toxicity of diesel exhaust. The aim of this study was to correlate engine operating systems with cytotoxicity using human cells. A dynamic direct exposure system containing human cells grown at the air liquid interface (ALI) was employed to expose human derived cells to diesel exhaust emitted under a range of engine loads. To determine correlation …


Thin Silicon Strip Detectors For Beam Monitoring In Micro-Beam Radiation Therapy, Marco Povoli, Enver Alagoz, Alberto Bravin, Iwan Cornelius, E Bräuer-Krisch, Pauline Fournier, Thor E. Hansen, Angela Kok, Michael L. F Lerch, E Monakhov, J Morse, Marco Petasecca, Herwig Requardt, Anatoly B. Rosenfeld, D Röhrich, H Sandaker, M Salome, B Stugu Jan 2015

Thin Silicon Strip Detectors For Beam Monitoring In Micro-Beam Radiation Therapy, Marco Povoli, Enver Alagoz, Alberto Bravin, Iwan Cornelius, E Bräuer-Krisch, Pauline Fournier, Thor E. Hansen, Angela Kok, Michael L. F Lerch, E Monakhov, J Morse, Marco Petasecca, Herwig Requardt, Anatoly B. Rosenfeld, D Röhrich, H Sandaker, M Salome, B Stugu

Faculty of Engineering and Information Sciences - Papers: Part A

Microbeam Radiation Therapy (MRT) is an emerging cancer treatment that is currently being developed at the European Synchrotron Radiation Facility (ESRF) in Grenoble, France. This technique uses a highly collimated and fractionated X-ray beam array with extremely high dose rate and very small divergence, to benefit from the dose-volume effect, thus sparing healthy tissue. In case of any beam anomalies and system malfunctions, special safety measures must be installed, such as an emergency safety shutter that requires continuous monitoring of the beam intensity profile. Within the 3DMiMic project, a novel silicon strip detector that can tackle the special features of …


Application Of The Largest Lyapunov Exponent Algorithm For Feature Extraction In Low Speed Slew Bearing Condition Monitoring, Wahyu Caesarendra, Prabuono Buyung Kosasih, A Kiet Tieu, Craig A. S Moodie Jan 2015

Application Of The Largest Lyapunov Exponent Algorithm For Feature Extraction In Low Speed Slew Bearing Condition Monitoring, Wahyu Caesarendra, Prabuono Buyung Kosasih, A Kiet Tieu, Craig A. S Moodie

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents a new application of the largest Lyapunov exponent (LLE) algorithm for feature extraction method in low speed slew bearing condition monitoring. The LLE algorithm is employed to measure the degree of non-linearity of the vibration signal which is not easily monitored by existing methods. The method is able to detect changes in the condition of the bearing and demonstrates better tracking of the progressive deterioration of the bearing during the 139 measurement days than comparable methods such as the time domain feature methods based on root mean square (RMS), skewness and kurtosis extraction from the raw vibration …


Investigation Of X70 Line Pipe Steel Fracture During Single Edge-Notched Tensile Testing Using Acoustic Emission Monitoring, Turbadrakh Chuluunbat, Cheng Lu, Andrii Kostryzhev, A Kiet Tieu Jan 2015

Investigation Of X70 Line Pipe Steel Fracture During Single Edge-Notched Tensile Testing Using Acoustic Emission Monitoring, Turbadrakh Chuluunbat, Cheng Lu, Andrii Kostryzhev, A Kiet Tieu

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents an investigation of the fracture behavior of X70 pipeline steel using the acoustic emission (AE) monitoring technique. The AE monitoring technique is widely used in mechanical and materials research for detection of plastic deformation, fracture initiation and crack growth. However, quantitative dependences of the AE parameters (such as signal amplitude and frequency) on the fracture parameters of X70 pipeline steel (such as ductile and brittle fracture initiation and propagation) have not been studied in depth and are therefore not completely understood. In this paper, we report an investigation of the effect of loading conditions on the fracture …


An Application Of Mathematical Morphology Operators As Features Extraction Method For Low Speed Slew Bearing Condition Monitoring, Wahyu Caesarendra, Dwi B. Wibowo, Mochammad Ariyanto, Joga D. Setiawan Jan 2015

An Application Of Mathematical Morphology Operators As Features Extraction Method For Low Speed Slew Bearing Condition Monitoring, Wahyu Caesarendra, Dwi B. Wibowo, Mochammad Ariyanto, Joga D. Setiawan

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents a new application of mathematical morphology (MM) operators for low speed slew bearing condition monitoring. The MM operators were used as a signal processing step and feature extraction method for bearing vibration signals. Four basic MM operators; erosion, dilation, closing and opening, were studied. This paper also investigates another potential MM operator, namely gradient operator. Two common time domain features in bearing condition monitoring, namely root mean square (RMS) and kurtosis, were extracted from the processed signal. The study shows that the changes in bearing condition can be clearly detected from the extracted features (RMS and kurtosis) …


The Feasibility Of Telephone Follow-Up Interviews For Monitoring Treatment Outcomes Of Australian Residential Drug And Alcohol Treatment Programs, Frank Deane, Peter James Kelly, Trevor Crowe, Geoffrey Lyons, Elizabeth Kate Cridland Jan 2014

The Feasibility Of Telephone Follow-Up Interviews For Monitoring Treatment Outcomes Of Australian Residential Drug And Alcohol Treatment Programs, Frank Deane, Peter James Kelly, Trevor Crowe, Geoffrey Lyons, Elizabeth Kate Cridland

Faculty of Social Sciences - Papers (Archive)

Background: Telephone follow-up interviewing is one method of monitoring treatment outcomes of individuals involved in drug and alcohol treatment programs. The present study is the first to examine the feasibility and generalizability of data obtained from telephone follow-up interviews after drug and alcohol treatment in Australia. Methods: Participants attended 1 of 8 Salvation Army Recovery Service Centres where staff administered outcome measures at intake. Three-month postdischarge telephone follow-up interviews were conducted by researchers from the Illawarra Institute for Mental Health, University of Wollongong. Results: A sample of 700 clients was obtained for follow-up (582 males; 118 females). A 51% follow-up …


Effects Of Problem Solving After Worked Example Study On Primary School Children's Monitoring Accuracy, Martine Baars, Tamara Van Gog, Anique De Bruin, Fred Paas Jan 2014

Effects Of Problem Solving After Worked Example Study On Primary School Children's Monitoring Accuracy, Martine Baars, Tamara Van Gog, Anique De Bruin, Fred Paas

Faculty of Social Sciences - Papers (Archive)

Research on expository text has shown that the accuracy of students' judgments of learning (JOLs) can be improved by instructional interventions that allow students to test their knowledge of the text. The present study extends this research, investigating whether allowing students to test the knowledge they acquired from studying a worked example by means of solving an identical problem, either immediately or delayed, would enhance JOL accuracy. Fifth grade children (i) gave an immediate JOL, (ii) a delayed JOL, (iii) solved a problem immediately and then gave a JOL, (iv) solved a problem immediately and gave a delayed JOL, or …


Circular Domain Features Based Condition Monitoring For Low Speed Slewing Bearing, Wahyu Caesarendra, Prabuono Buyung Kosasih, A Kiet Tieu, Craig A. S Moodie Jan 2014

Circular Domain Features Based Condition Monitoring For Low Speed Slewing Bearing, Wahyu Caesarendra, Prabuono Buyung Kosasih, A Kiet Tieu, Craig A. S Moodie

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents a novel application of circular domain features calculation based condition monitoring method for low rotational speed slewing bearing. The method employs data reduction process using piecewise aggregate approximation (PAA) to detect frequency alteration in the bearing signal when the fault occurs. From the processed data, circular domain features such as circular mean, circular variance, circular skewness and circular kurtosis are calculated and monitored. It is shown that the slight changes of bearing condition during operation can be identified more clearly in circular domain analysis compared to time domain analysis and other advanced signal processing methods such as …


Computer Vision Based Traffic Monitoring System For Multi-Track Freeways, Zubair Iftikhar, Prashan Premaratne, Peter James Vial Jan 2014

Computer Vision Based Traffic Monitoring System For Multi-Track Freeways, Zubair Iftikhar, Prashan Premaratne, Peter James Vial

Faculty of Engineering and Information Sciences - Papers: Part A

Nowadays, development is synonymous with construction of infrastructure. Such road infrastructure needs constant attention in terms of traffic monitoring as even a single disaster on a major artery will disrupt the way of life. Humans cannot be expected to monitor these massive infrastructures over 24/7 and computer vision is increasingly being used to develop automated strategies to notify the human observers of any impending slowdowns and traffic bottlenecks. However, due to extreme costs associated with the current state of the art computer vision based networked monitoring systems, innovative computer vision based systems can be developed which are standalone and efficient …


Social Implications Of Wearable Computing And Augmediated Reality In Every Day Life (Ieee Symposium On Technology And Society, Istas13), Katina Michael Jun 2013

Social Implications Of Wearable Computing And Augmediated Reality In Every Day Life (Ieee Symposium On Technology And Society, Istas13), Katina Michael

Associate Professor Katina Michael

It was in July 2012 that Steve Mann and I corresponded on the possibility of hosting a conference on wearable computing in Toronto, Canada. Steve had just returned home from a family holiday to France and publicly blogged about an unfortunate incident that had happened to him while away. On 17th July 2012 he posted: “Physical assault by McDonald’s for wearing Digital Eye Glass”. We both knew the timing was right for such an event that was not just a technical engineering or applied orientation on the theme of smart worlds, but an event that would grapple with the dichotomies …


Monitoring The Levels Of Important Nutrients In The Food Supply, B Neal, G Sacks, B Swinburn, S Vandevijvere, E Dunford, W Snowdon, J Webster, S Barquera, S Friel, C Hawkes, B Kelly, S Kumanyika, M L'Abbe, A Lee, T Lobstein, J Ma, J Macmullan, S Mohan, M Rayner, C Monteiro, D Sanders, C Walker Jan 2013

Monitoring The Levels Of Important Nutrients In The Food Supply, B Neal, G Sacks, B Swinburn, S Vandevijvere, E Dunford, W Snowdon, J Webster, S Barquera, S Friel, C Hawkes, B Kelly, S Kumanyika, M L'Abbe, A Lee, T Lobstein, J Ma, J Macmullan, S Mohan, M Rayner, C Monteiro, D Sanders, C Walker

Faculty of Science, Medicine and Health - Papers: part A

A food supply that delivers energy-dense products with high levels of salt, saturated fats and trans fats, in large portion sizes, is a major cause of non-communicable diseases (NCDs). The highly processed foods produced by large food corporations are primary drivers of increases in consumption of these adverse nutrients. The objective of this paper is to present an approach to monitoring food composition that can both document the extent of the problem and underpin novel actions to address it. The monitoring approach seeks to systematically collect information on high-level contextual factors influencing food composition and assess the energy density, salt, …


Monitoring The Price And Affordability Of Foods And Diets Globally, A Lee, C N. Mhurchu, G Sacks, Boyd A. Swinburn, W Snowdon, S Vandevijvere, C Hawkes, M L'Abbe, M Rayner, D Sanders, S Barquera, Sharon Friel, Bridget P. Kelly, S Kumanyika, T Lobstein, J Ma, J Macmullan, S Mohan, C Monteiro, Bruce Neal, C Walker Jan 2013

Monitoring The Price And Affordability Of Foods And Diets Globally, A Lee, C N. Mhurchu, G Sacks, Boyd A. Swinburn, W Snowdon, S Vandevijvere, C Hawkes, M L'Abbe, M Rayner, D Sanders, S Barquera, Sharon Friel, Bridget P. Kelly, S Kumanyika, T Lobstein, J Ma, J Macmullan, S Mohan, C Monteiro, Bruce Neal, C Walker

Faculty of Science, Medicine and Health - Papers: part A

Food prices and food affordability are important determinants of food choices, obesity and non-communicable diseases. As governments around the world consider policies to promote the consumption of healthier foods, data on the relative price and affordability of foods, with a particular focus on the difference between ‘less healthy’ and ‘healthy’ foods and diets, are urgently needed. This paper briefly reviews past and current approaches to monitoring food prices, and identifies key issues affecting the development of practical tools and methods for food price data collection, analysis and reporting. A step-wise monitoring framework, including measurement indicators, is proposed. ‘Minimal’ data collection …


Building The Case For Independent Monitoring Of Food Advertising On Australian Television, Lesley King, Lana Hebden, Anne Grunseit, Bridget Kelly, Kathy Chapman Jan 2013

Building The Case For Independent Monitoring Of Food Advertising On Australian Television, Lesley King, Lana Hebden, Anne Grunseit, Bridget Kelly, Kathy Chapman

Faculty of Social Sciences - Papers (Archive)

Objective To provide an independent monitoring report examining the ongoing impact of Australian self-regulatory pledges on food and drink advertising to children on commercial television.

Design Analysis of food advertisements across comparable sample time periods in April/May 2006, 2007, 2009, 2010 and 2011. The main outcome measure comprised change in the mean rate of non-core food advertisements from 2006 to 2011.

Setting Sydney free-to-air television channels.

Subjects Televised food advertisements.

Results In 2011 the rate of non-core food advertisements was not significantly different from that in 2006 or 2010 (3·2/h v. 4·1/h and 3·1/h), although there were variations across …


Developing A Standardized Approach For Monitoring Food Marketing To Children, Bridget Kelly, Lesley King, Louise Baur, Boyd A. Swinburn, M Rayner, T Lobstein, J Macmullan, S Mohan Jan 2013

Developing A Standardized Approach For Monitoring Food Marketing To Children, Bridget Kelly, Lesley King, Louise Baur, Boyd A. Swinburn, M Rayner, T Lobstein, J Macmullan, S Mohan

Faculty of Social Sciences - Papers (Archive)

Abstract presented at the 2013 Annual Meeting of the International Society for Behavioral Nutrition and Physical Activity, 22-25 May 2013, Ghent, Belgium


Monitoring The Impacts Of Trade Agreements On Food Environments, Sharon Friel, Libby Hattersley, W Snowdon, A -M Thow, T Lobstein, D Sanders, S Barquera, S Mohan, C Hawkes, Bridget Kelly, S Kumanyika, M L'Abbe, A Lee, J Ma, J Macmullan, C Monteiro, Bruce Neal, M Rayner, G Sacks, Boyd A. Swinburn, S Vandevijvere, C Walker Jan 2013

Monitoring The Impacts Of Trade Agreements On Food Environments, Sharon Friel, Libby Hattersley, W Snowdon, A -M Thow, T Lobstein, D Sanders, S Barquera, S Mohan, C Hawkes, Bridget Kelly, S Kumanyika, M L'Abbe, A Lee, J Ma, J Macmullan, C Monteiro, Bruce Neal, M Rayner, G Sacks, Boyd A. Swinburn, S Vandevijvere, C Walker

Faculty of Social Sciences - Papers (Archive)

The liberalization of international trade and foreign direct investment through multilateral, regional and bilateral agreements has had profound implications for the structure and nature of food systems, and therefore, for the availability, nutritional quality, accessibility, price and promotion of foods in different locations. Public health attention has only relatively recently turned to the links between trade and investment agreements, diets and health, and there is currently no systematic monitoring of this area. This paper reviews the available evidence on the links between trade agreements, food environments and diets from an obesity and non-communicable disease (NCD) perspective. Based on the key …


Informas (International Network For Food And Obesity/Non-Communicable Diseases Research, Monitoring And Action Support): Overview And Key Principles, Boyd A. Swinburn, G Sacks, S Vandevijvere, S Kumanyika, T Lobstein, Bruce Neal, S Barquera, Sharon Friel, C Hawkes, Bridget Kelly, M L'Abbe, A Lee, J Ma, J Macmullan, S Mohan, C Monteiro, M Rayner, D Sanders, W Snowdon, C Walker Jan 2013

Informas (International Network For Food And Obesity/Non-Communicable Diseases Research, Monitoring And Action Support): Overview And Key Principles, Boyd A. Swinburn, G Sacks, S Vandevijvere, S Kumanyika, T Lobstein, Bruce Neal, S Barquera, Sharon Friel, C Hawkes, Bridget Kelly, M L'Abbe, A Lee, J Ma, J Macmullan, S Mohan, C Monteiro, M Rayner, D Sanders, W Snowdon, C Walker

Faculty of Social Sciences - Papers (Archive)

Non-communicable diseases (NCDs) dominate disease burdens globally and poor nutrition increasingly contributes to this global burden. Comprehensive monitoring of food environments, and evaluation of the impact of public and private sector policies on food environments is needed to strengthen accountability systems to reduce NCDs. The International Network for Food and Obesity/NCDs Research, Monitoring and Action Support (INFORMAS) is a global network of public-interest organizations and researchers that aims to monitor, benchmark and support public and private sector actions to create healthy food environments and reduce obesity, NCDs and their related inequalities. The INFORMAS framework includes two 'process' modules, that monitor …


Monitoring The Availability Of Healthy And Unhealthy Foods And Non-Alcoholic Beverages In Community And Consumer Retail Food Environments Globally, C N. Mhurchu, S Vandevijvere, W Waterlander, L E. Thornton, Bridget Kelly, A J. Cameron, W Snowdon, Boyd A. Swinburn Jan 2013

Monitoring The Availability Of Healthy And Unhealthy Foods And Non-Alcoholic Beverages In Community And Consumer Retail Food Environments Globally, C N. Mhurchu, S Vandevijvere, W Waterlander, L E. Thornton, Bridget Kelly, A J. Cameron, W Snowdon, Boyd A. Swinburn

Faculty of Social Sciences - Papers (Archive)

Retail food environments are increasingly considered influential in determining dietary behaviours and health outcomes. We reviewed the available evidence on associations between community (type, availability and accessibility of food outlets) and consumer (product availability, prices, promotions and nutritional quality within stores) food environments and dietary outcomes in order to develop an evidence-based framework for monitoring the availability of healthy and unhealthy foods and non-alcoholic beverages in retail food environments. Current evidence is suggestive of an association between community and consumer food environments and dietary outcomes; however, substantial heterogeneity in study designs, methods and measurement tools makes it difficult to draw …


Monitoring And Benchmarking Population Diet Quality Globally: A Step-Wise Approach, S Vandevijvere, C Monteiro, S M. Krebs-Smith, A Lee, Boyd A. Swinburn, Bridget Kelly, Bruce Neal, W Snowdon, G Sacks Jan 2013

Monitoring And Benchmarking Population Diet Quality Globally: A Step-Wise Approach, S Vandevijvere, C Monteiro, S M. Krebs-Smith, A Lee, Boyd A. Swinburn, Bridget Kelly, Bruce Neal, W Snowdon, G Sacks

Faculty of Social Sciences - Papers (Archive)

INFORMAS (International Network for Food and Obesity/non-communicable diseases Research, Monitoring and Action Support) aims to monitor and benchmark the healthiness of food environments globally. In order to assess the impact of food environments on population diets, it is necessary to monitor population diet quality between countries and over time. This paper reviews existing data sources suitable for monitoring population diet quality, and assesses their strengths and limitations. A step-wise framework is then proposed for monitoring population diet quality. Food balance sheets (FBaS), household budget and expenditure surveys (HBES) and food intake surveys are all suitable methods for assessing population diet …


Monitoring Policy And Actions On Food Environments: Rationale And Outline Of The Informas Policy Engagement And Communication Strategies, H Brinsden, T Lobstein, J Landon, V Kraak, G Sacks, S Kumanyika, Boyd A. Swinburn, S Barquera, Sharon Friel, C Hawkes, Bridget Kelly, M L'Abbe, A Lee, J Ma, J Macmullen, S Mohan, C Monteiro, Bruce Neal, M Rayner, D Sanders, W Snowdon, S Vandevijvere, C Walker Jan 2013

Monitoring Policy And Actions On Food Environments: Rationale And Outline Of The Informas Policy Engagement And Communication Strategies, H Brinsden, T Lobstein, J Landon, V Kraak, G Sacks, S Kumanyika, Boyd A. Swinburn, S Barquera, Sharon Friel, C Hawkes, Bridget Kelly, M L'Abbe, A Lee, J Ma, J Macmullen, S Mohan, C Monteiro, Bruce Neal, M Rayner, D Sanders, W Snowdon, S Vandevijvere, C Walker

Faculty of Social Sciences - Papers (Archive)

The International Network for Food and Obesity/non-communicable diseases Research, Monitoring and Action Support (INFORMAS) proposes to collect performance indicators on food policies, actions and environments related to obesity and non-communicable diseases. This paper reviews existing communications strategies used for performance indicators and proposes the approach to be taken for INFORMAS. Twenty-seven scoring and rating tools were identified in various fields of public health including alcohol, tobacco, physical activity, infant feeding and food environments. These were compared based on the types of indicators used and how they were quantified, scoring methods, presentation and the communication and reporting strategies used. There are …


An Application Of Nonlinear Feature Extraction – A Case Study For Low Speed Slewing Bearing Condition Monitoring And Prognosis, Wahyu Caesarendra, Prabuono Buyung Kosasih, A K. Tieu, Craig Moodie Jan 2013

An Application Of Nonlinear Feature Extraction – A Case Study For Low Speed Slewing Bearing Condition Monitoring And Prognosis, Wahyu Caesarendra, Prabuono Buyung Kosasih, A K. Tieu, Craig Moodie

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents the application of four nonlinear methods of feature extraction in slewing bearing condition monitoring and prognosis: these are largest Lyapunov exponent, fractal dimension, correlation dimension, and approximate entropy methods. Although correlation dimension and approximate entropy methods have been used previously, the largest Lyapunov exponent and fractal dimension methods have not been used in vibration condition monitoring to date. The vibration data of the laboratory slewing bearing test-rig run at 1 rpm was acquired daily from February to August 2007 (138 days). As time progressed, a more accurate observation of the alteration of bearing condition from normal to …


Condition Monitoring Of Slow Speed Slewing Bearing Based On Largest Lyapunov Exponent Algorithm And Circular-Domain Feature Extractions, Wahyu Caesarendra, Prabuono Buyung Kosasih, A Kiet Tieu, Craig A. S Moodie Jan 2013

Condition Monitoring Of Slow Speed Slewing Bearing Based On Largest Lyapunov Exponent Algorithm And Circular-Domain Feature Extractions, Wahyu Caesarendra, Prabuono Buyung Kosasih, A Kiet Tieu, Craig A. S Moodie

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents a combined nonlinear and circular features extraction-based condition monitoring method for low speed slewing bearing. The proposed method employs the largest Lyapunov exponent (LLE) algorithm as a signal processing method based on vibration data. LLE is used to detect chaos existence in vibration data in discrete angular positions of the shaft. From the processed data, circular features such as mean, skewness and kurtosis are calculated and monitored. It is shown that the onset and the progressively deteriorating bearing condition can be detected more clearly in circular-domain features compared to time-domain features. The application of the method is …


Monitoring Food And Non-Alcoholic Beverage Promotions To Children, B Kelly, L King, L Baur, M Rayner, T Lobstein, C Monteiro, J Macmullan, S Mohan, S Barquera, S Friel, C Hawkes, S Kumanyika, M L'Abbe, A Lee, J Ma, B Neal, G Sacks, D Sanders, W Snowdon, B Swinburn, S Vandevijvere, C Walker Jan 2013

Monitoring Food And Non-Alcoholic Beverage Promotions To Children, B Kelly, L King, L Baur, M Rayner, T Lobstein, C Monteiro, J Macmullan, S Mohan, S Barquera, S Friel, C Hawkes, S Kumanyika, M L'Abbe, A Lee, J Ma, B Neal, G Sacks, D Sanders, W Snowdon, B Swinburn, S Vandevijvere, C Walker

Faculty of Science, Medicine and Health - Papers: part A

Food and non-alcoholic beverage marketing is recognized as an important factor influencing food choices related to non-communicable diseases. The monitoring of populations' exposure to food and non-alcoholic beverage promotions, and the content of these promotions, is necessary to generate evidence to understand the extent of the problem, and to determine appropriate and effective policy responses. A review of studies measuring the nature and extent of exposure to food promotions was conducted to identify approaches to monitoring food promotions via dominant media platforms. A step-wise approach, comprising 'minimal', 'expanded' and 'optimal' monitoring activities, was designed. This approach can be used to …


Monitoring Foods And Beverages Provided And Sold In Public Sector Settings, M L'Abbe, A Schermel, L Minaker, B Kelly, A Lee, S Vandevijvere, P Twohig, S Barquera, S Friel, C Hawkes, S Kumanyika, T Lobstein, J Ma, J Macmullan, S Mohan, C Monteiro, B Neal, M Rayner, G Sacks, D Sanders, W Snowdon, B Swinburn, C Walker Jan 2013

Monitoring Foods And Beverages Provided And Sold In Public Sector Settings, M L'Abbe, A Schermel, L Minaker, B Kelly, A Lee, S Vandevijvere, P Twohig, S Barquera, S Friel, C Hawkes, S Kumanyika, T Lobstein, J Ma, J Macmullan, S Mohan, C Monteiro, B Neal, M Rayner, G Sacks, D Sanders, W Snowdon, B Swinburn, C Walker

Faculty of Science, Medicine and Health - Papers: part A

This paper outlines a step-wise framework for monitoring foods and beverages provided or sold in publicly funded institutions. The focus is on foods in schools, but the framework can also be applied to foods provided or sold in other publicly funded institutions. Data collection and evaluation within this monitoring framework will consist of two components. In component I, information on existing food or nutrition policies and/or programmes within settings would be compiled. Currently, nutrition standards and voluntary guidelines associated with such policies/programmes vary widely globally. This paper, which provides a comprehensive review of such standards and guidelines, will facilitate institutional …


Performance Monitoring Of Rail Tracks Stabilized By Geosynthetics And Shock Mats: Case Studies At Bulli And Singleton In Australia, Buddhima Indraratna, Sanjay Nimbalkar, Pongpipat Anantanasakul, Cholachat Rujikiatkamjorn, Tim Neville Jan 2013

Performance Monitoring Of Rail Tracks Stabilized By Geosynthetics And Shock Mats: Case Studies At Bulli And Singleton In Australia, Buddhima Indraratna, Sanjay Nimbalkar, Pongpipat Anantanasakul, Cholachat Rujikiatkamjorn, Tim Neville

Faculty of Engineering and Information Sciences - Papers: Part A

Rail tracks are conventionally built on compacted ballast and structural fill embankments overlying the natural subsoil. Ballast plays an important role in providing track stiffness to support heavy traffic loads, and providing rapid drainage. However, ballast deforms and degrades progressively under the heavy cyclic loading of passenger and freight trains, which may lead to a loss of track geometry, and require costly regular maintenance. In particular, track construction requires appropriate stabilization techniques for ballast, the extent of which depends also on the type of subgrade. Comprehensive field trials were carried out on two rail lines in Bulli and recently in …


Bryophyte Species Composition Over Moisture Gradients In The Windmill Islands, East Antarctica: Development Of A Baseline For Monitoring Climate Change Impacts, J Wasley, S A. Robinson, J D. Turnbull, D H. King, W Wanek, M Popp Oct 2012

Bryophyte Species Composition Over Moisture Gradients In The Windmill Islands, East Antarctica: Development Of A Baseline For Monitoring Climate Change Impacts, J Wasley, S A. Robinson, J D. Turnbull, D H. King, W Wanek, M Popp

Faculty of Science - Papers (Archive)

Extreme environmental conditions prevail on the Antarctic continent and limit plant diversity to cryptogamic communities, dominated by bryophytes and lichens. Even small abiotic shifts, associated with climate change, are likely to have pronounced impacts on these communities that currently exist at their physiological limit of survival. Changes to moisture availability, due to precipitation shifts or alterations to permanent snow reserves, will most likely cause greatest impact. In order to establish a baseline for determining the effect of climate change on continental Antarctic terrestrial communities and to better understand bryophyte species distributions in relation to moisture in a floristically important Antarctic …


Location Privacy Under Dire Threat As Uberveillance Stalks The Streets, Katina Michael, Roger Clarke Jan 2012

Location Privacy Under Dire Threat As Uberveillance Stalks The Streets, Katina Michael, Roger Clarke

Associate Professor Katina Michael

Location tracking and monitoring applications have proliferated with the arrival of smart phones that are equipped with onboard global positioning system (GPS) chipsets. It is now possible to locate a smart phone user down to 10 metres of accuracy on average. Innovators have been quick to capitalise on this emerging market by introducing novel pedestrian tracking technologies which can denote the geographic path of a mobile user. At the same time there is contention by law enforcement personnel over the need for a warrant process to track an individual in a public space. This paper considers the future of location …


Routine Outcome Monitoring And Feedback On Physical Or Mental Health Status: Evidence And Theory, Ingrid V. Carlier, Denise Meuldijk, Irene M. Van Vliet, Esther M. Van Fenema, Nic J. Van Der Wee, Frans G. Zitman Jan 2012

Routine Outcome Monitoring And Feedback On Physical Or Mental Health Status: Evidence And Theory, Ingrid V. Carlier, Denise Meuldijk, Irene M. Van Vliet, Esther M. Van Fenema, Nic J. Van Der Wee, Frans G. Zitman

Faculty of Social Sciences - Papers (Archive)

Objectives: Routine Outcome Monitoring (ROM) is an important quality tool for measuring outcome of treatment in health care. The objective of this article is to summarize the evidence base that supports the provision of feedback on ROM results to (mental) health care professionals and patients. Also, some relevant theoretical aspects are considered. Methods: Literature study (Pubmed, Medline, PsychINFO, Embase Psychiatry, 1975-2009) concerning randomized controlled trials (RTC's) of ROM and feedback on physical or mental health status of patients of all ages. Main search terms were routine outcome monitoring/measurement, feedback, health status measurement, patient reported outcome measures. Results: Included were 52 …