Duong Tran - Academia.edu (original) (raw)

Papers by Duong Tran

Addiction (Abingdon, England), Jan 27, 2018

To estimate the prevalence of exposure to acamprosate in pregnancy in New South Wales (NSW), Aust... more To estimate the prevalence of exposure to acamprosate in pregnancy in New South Wales (NSW), Australia, to compare the maternal health of women exposed to acamprosate during pregnancy with non-exposed women, and to compare neonatal outcomes in neonates exposed to acamprosate in utero with non-exposed neonates. A population-based retrospective cohort study, comparing maternal and neonatal health outcomes in women exposed to acamprosate during pregnancy with women with a recent history of problematic alcohol use (alcohol comparison group), and women from the general community (community comparison group) using state-wide linked health data. New South Wales, Australia. The study included women treated with acamprosate for more than 30 days during pregnancy between 2003 and 2012 (n = 54) and two matched comparison groups (1 : 3); an alcohol comparison group (n = 162) and a community comparison group (n = 162). The prevalence of acamprosate exposure was calculated per 100 000 pregnancies...

BMC health services research, Aug 1, 2017

Middle-aged and older patients are prominent users of telephone triage services for timely access... more Middle-aged and older patients are prominent users of telephone triage services for timely access to health information and appropriate referrals. Non-compliance with advice to seek appropriate care could potentially lead to poorer health outcomes among those patients. It is imperative to assess the extent to which middle-aged and older patients follow triage advice and how this varies according to their socio-demographic, lifestyle and health characteristics as well as features of the call. Records of calls to the Australian healthdirect helpline (July 2008-December 2011) were linked to baseline questionnaire data from the 45 and Up Study (participants age ≥ 45 years), records of emergency department (ED) presentations, hospital admissions, and medical consultation claims. Outcomes of the call included compliance with the advice "Attend ED immediately"; "See a doctor (immediately, within 4 hours, or within 24 hours)"; "Self-care"; and self-referral to ...

The International journal of oral & maxillofacial implants

To compare dental implant survival rates when placed in native bone and grafted sites. Additional... more To compare dental implant survival rates when placed in native bone and grafted sites. Additionally, risk factors associated with dental implant loss were identified. This study was based on the hypothesis that bone grafting has no effect on implant survival rates. A retrospective chart review was conducted for patients receiving dental implants at the University of Texas, School of Dentistry from 1985 to 2012. Exclusion criteria included patients with genetic diseases, radiation and chemotherapy, or an age less than 18 years. To avoid misclassification bias, implants were excluded if bone grafts were only done at the same time of placement. Data on age, sex, tobacco use, diabetes, osteoporosis, anatomical location of the implant, implant length and width, bone graft, and professional maintenance were collected for analysis. A total of 1,222 patients with 2,729 implants were included. The cumulative survival rates at 5 and 10 years were 92% and 87% for implants placed in native bone...

IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society, 2010

Abstract-Micro-grids that are infrastructure for implemen-tation and utilization of renewable ene... more Abstract-Micro-grids that are infrastructure for implemen-tation and utilization of renewable energy sources require high-power-density, high-energy-density storage. Composite Energy Storage System (CESS) is a combination of various energy storage technologies that offers not ...

Proceedings of the JFPS International Symposium on Fluid Power, 2008

This paper presents experimental and numerical simulation results of the electric and flow fields... more This paper presents experimental and numerical simulation results of the electric and flow fields in a charge injection type of electrostatic oil filter. A previous work has shown that flow is generated from the tips of the projections of the emitter electrode towards the smooth electrodes because of ion drag phenomenon and that the flow may detach part of the contaminant particles captured on the smooth electrodes and may be the principal cause of the saturation of the filtration speed at higher applied voltages and oil temperatures. In order to minimize the bad influence of the ion drag flow on the filter performance, it is important to be able to predict the flow in filters of various configurations by numerical simulation. Experimental results of the flow field are compared to numerical simulation results. In addition, electric potential distribution is measured and is compared between experiment and simulation. It is shown that the magnitude of the ion drag flow is increased with increasing applied voltage, is decreased with decreasing electrode spacing and is larger for negative charge injection than for positive charge injection. Similar results can be obtained by numerical simulations but the improvement of simulation accuracy is necessary.

2011 IEEE Ninth International Conference on Power Electronics and Drive Systems, 2011

To integrate wind energy into power grid, energy storage system (ESS) is needed to smooth out flu... more To integrate wind energy into power grid, energy storage system (ESS) is needed to smooth out fluctuations of wind power output. As power and energy requirements for energy storage in wind application are high, ESS cost is high. In this paper, selection of storage technologies and sizing of storage units in ESS to achieve high power, high energy capacity and

International journal of palliative nursing, 2010

A wide range of services are provided to palliative care clients to alleviate pain and improve th... more A wide range of services are provided to palliative care clients to alleviate pain and improve their quality of life. The purpose of this study was to explore the perceptions of clients and their carers regarding palliative care services in New South Wales, Austalia. Ten patients and their carers (n = 7) were randomly selected from a sample of palliative care clients and were informed of the study and interviewed. Interview data were coded independently by three researchers and thematic analysis was undertaken. The themes identified were similar for both clients and carers and included: access to services; service provision; impact on way of life; usefulness of services; and staffing. An additional theme identified by clients was the burden of caregiving on carers. Knowledge of perceptions and concerns of client and carers is important to consider when planning palliative care services.

2005 IEEE Instrumentationand Measurement Technology Conference Proceedings

... Reading' MA: Kluwer Academic' 1989 [7] A. Bellaouar and MI Elmasry&#x27... more ... Reading' MA: Kluwer Academic' 1989 [7] A. Bellaouar and MI Elmasry' "Low-Power Digital VLSI De-sign Circuits and Systems ... area of VHDL RTL descriptions"' Design of Circuits and Integrated Systems (DCIS) Montpellier (France)' november 2000 [10] Samir Palnitkar' "Verilog ...

Palliative and Supportive Care, 2012

Objective:This study aimed to investigate health-related quality of life of palliative care (PC) ... more Objective:This study aimed to investigate health-related quality of life of palliative care (PC) clients and their caregivers, at baseline and follow-up, following a referral to a community PC service.Method:Quality of life of clients and their caregivers was respectively measured using the McGill Quality of Life instrument (MQoL) and the Caregiver Quality of Life Cancer Index (CQoLC) instruments. Participants were recruited from June 8 to October 27, 2006. This study was undertaken in one zone of an Area Health Service in New South Wales, which has a diverse socioeconomic population. The zone covers an area of 6237 km2 and is divided into five sectors, each with a PC service, all of which participated in this study.Results:Data were obtained from 49 clients and 43 caregivers at baseline, and 22 clients and 12 caregivers at 8 week follow-up. Twenty-one participants died and six moved out of the area during the study. At baseline, clients reported a low mean score for physical sympto...

The Journal of the Acoustical Society of America, 2012

The probability distribution of ocean-acoustic broadband signal energy after saturated multipath ... more The probability distribution of ocean-acoustic broadband signal energy after saturated multipath propagation is derived using coherence theory. The frequency components obtained from Fourier decomposition of a broadband signal are each assumed to be fully saturated with energy spectral density that obey the exponential distribution with 5.6 dB standard deviation and unity scintillation index. When the signal bandwidth and measurement time are larger than the correlation bandwidth and correlation time, respectively, of its energy spectral density components, the broadband signal energy obtained by integrating the energy spectral density across the signal bandwidth then follows the Gamma distribution with a standard deviation smaller than 5.6 dB and a scintillation index less than unity. The theory is verified with broadband transmissions in the Gulf of Maine shallow water waveguide in the 300 to 1200 Hz frequency range. The standard deviations of received broadband signal energies range from 2.7 to 4.6 dB for effective bandwidths up to 42 Hz, while the standard deviations of individual energy spectral density components are roughly 5.6 dB. The energy spectral density correlation bandwidths of the received broadband signals are found to be larger for signals with higher center frequencies and are roughly 10% of each center frequency.

The Journal of the Acoustical Society of America, 2011

During the 2006 ocean acoustic waveguide remote sensing (OAWRS) experiment in the Gulf of Maine, ... more During the 2006 ocean acoustic waveguide remote sensing (OAWRS) experiment in the Gulf of Maine, large shoals of Atlantic herring were instantaneously imaged in the frequency range from 300 to 1200 Hz. Simultaneously, several thousand instances of marine ...

Journal of Electrostatics, 2011

This paper deals with the effect of filter element on the filtration speed of a charge injection ... more This paper deals with the effect of filter element on the filtration speed of a charge injection type of electrostatic oil filter proposed by Yanada and his coworkers. The effect of the filter elements that are inserted between the emitter and collector electrodes on the filtration speed is examined using several types of oil. In order to discuss the effect of the filter elements on the filtration speed, numerical simulations of electrostatic field are conducted and ion drag flow patterns are measured using twodimensional filter models. An optimal filter configuration is proposed.

Journal of Clinical Periodontology, 2013

Objective-To estimate bias associated with partial mouth periodontal examination (PMPE) protocols... more Objective-To estimate bias associated with partial mouth periodontal examination (PMPE) protocols regarding estimates of prevalence, severity and extent of clinical attachment loss (CAL), pocket depth (PD) and gingival recession (REC). Material and Methods-A search was made for articles published in English, from 1946-2012, which compared PMPE vs. full mouth periodontal examination (FMPE) protocols for CAL or PD ≥ 4mm or REC ≥ 3mm thresholds. PMPE protocols were evaluated for sensitivity of estimates of periodontitis prevalence, relative biases for severity and extent estimates. Results-A review of the literature identified 12 studies which reported 32 PMPE protocols. Three PMPE protocols which had sensitivities ≥ 85% and relative biases ≤ 0.05 in absolute values for severity and extent estimates were: 1) half mouth six-sites, 2) diagonal quadrants six-sites and 3) full mouth mesiobuccal-midbuccal-distobuccal (MB-B-DB). Two other PMPE protocols (full mouth and half mouth mesiobuccal-midbuccal-distolingual) performed well for prevalence and severity of periodontitis; however, their performance in estimates of extent was unknown. Conclusions-Among the 32 PMPE protocols listed, the half-mouth six-sites and full-mouth MB-B-DB protocols had the highest sensitivities for prevalence estimates and lowest relative biases for severity and extent estimates.

International Journal of Medical Informatics, 2013

Background-Poor usability is one of the major barriers for optimally using electronic health reco... more Background-Poor usability is one of the major barriers for optimally using electronic health records (EHRs). Dentists are increasingly adopting EHRs, and are using structured data entry interfaces to enter data such that the data can be easily retrieved and exchanged. Until recently, dentists have lacked a standardized terminology to consistently represent oral health diagnoses. Objectives-In this study we evaluated the usability of a widely used EHR interface that allow the entry of diagnostic terms, using multi-faceted methods to identify problems and work with the vendor to correct them using an iterative design method.

IEEE Transactions on Smart Grid, 2013

Energy storage is needed in micro-grid to help solve the problem of intermittency introduced by r... more Energy storage is needed in micro-grid to help solve the problem of intermittency introduced by renewable energy sources, enhance power quality and improve controllability of power flow. This paper presents an energy manager for energy storage system (ESS) in micro-grids. The objectives of the energy manager are focused on improving the energy efficiency and extending the life expectancy of ESS while ensuring constraints of energy storage modules are complied with. To this end a smart local prediction and local scheduling algorithm is proposed. A battery lifetime model that uses the proposed Peukert lifetime energy throughput based on the workload of the battery is developed. Verification shows that in the long run, the energy manger can improve overall energy efficiency of ESS from 74.1% to 85.5%, and improve estimated lifetime of 2 Battery Packs in ESS from 3.6 years and 2.4 years to 5 years and 5.7 years respectively.

IEEE Transactions on Signal Processing, 1991

The sensitivity to the spectral estimate of the original image of lineat. minimum mean-square err... more The sensitivity to the spectral estimate of the original image of lineat. minimum mean-square error (LMMSE) color image restoration methods is determined. The method which assumes knowledge of the between-channel correlation proves to be the most sensitive. The methods which use an autoregressive spectral estimate among independent channels prove to be the least sensitive when prototype images must be used to estimate the spectrum.

IEEE Transactions on Power Electronics, 2011

Renewable-energy-based microgrids are a better way of utilizing renewable power and reduce the us... more Renewable-energy-based microgrids are a better way of utilizing renewable power and reduce the usage of fossil fuels. Usage of energy storage becomes mandatory when such microgrids are used to supply quality power to the loads. Microgrids have two modes of operation, namely, grid-connected and islanding modes. During islanding mode, the main responsibility of the storage is to perform energy balance. During grid-connected mode, the goal is to prevent propagation of the renewable source intermittency and load fluctuations to the grid. Energy storage of a single type cannot perform all these jobs efficiently in a renewable powered microgrid. The intermittent nature of renewable energy sources like photovoltaic (PV) demands usage of storage with high energy density. At the same time, quick fluctuation of load demands storage with high power density. This paper proposes a composite energy storage system (CESS) that contains both high energy density storage battery and high power density storage ultracapacitor to meet the aforementioned requirements. The proposed power converter configuration and the energy management scheme can actively distribute the power demand among the different energy storages. Results are presented to show the feasibility of the proposed scheme.

IEEE Transactions on Industrial Electronics, 2014

In order to resolve the problem of energy hunger nowadays, saving lighting energy in buildings co... more In order to resolve the problem of energy hunger nowadays, saving lighting energy in buildings contributes an important part. In this paper, a sensorless illumination control scheme for smart networked LED lighting has been investigated. The scheme is based on a feedforward neural network to model all the nonlinear and linear relationships inside the lighting system as the controlled plant. Because the scheme does not rely on lighting simulation software, it is flexible to be implemented on microcontrollers. The scheme, moreover, can provide not only high accuracy in modeling but also global optimum in energy saving. Without using light sensors in its control loop, the approach can save significant cost and provide ease of installation as well. In addition, it also has the strength of fast response owing to feedforward control based on neural networks. The experimental results show that the approach can easily attain more than 95% modeling accuracy and also improve more than 28% energy saving with its optimal nonlinear multiple-input multiple-output control.