ORCID Profile
0000-0002-0236-2086
Current Organisations
Melbourne Health
,
Peter MacCallum Cancer Centre
,
Duy Tan University
,
Ho Chi Minh City University of Transport, Vietnam
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Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2022
Publisher: Elsevier BV
Date: 05-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2021
Publisher: Hindawi Limited
Date: 2014
DOI: 10.1155/2014/313195
Abstract: The use of per-subcarrier antenna subset selection in OFDM wireless systems offers higher system capacity and/or improved link reliability. However, the implementation of the conventional per-subcarrier selection scheme may result in significant fluctuations of the average power and peak power across antennas, which affects the potential benefits of the system. In this paper, power efficiency of high-power lifiers and energy efficiency in per-subcarrier antenna selection MIMO-OFDM systems are investigated. To deliver the maximum overall power efficiency, we propose a two-step strategy for data-subcarrier allocation. This strategy consists of an equal allocation of data subcarriers based on linear optimization and peak-power reduction via cross-antenna permutations. For analysis, we derive the CCDF (complementary cumulative distribution function) of the power efficiency as well as the analytical expressions of the average power efficiency. It is proved from the power-efficiency perspective that the proposed allocation scheme outperforms the conventional scheme. We also show that the improvement in the power efficiency translates into an improved capacity and, in turn, increases energy efficiency of the proposed system. Simulation results are provided to validate our analyses.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2023
Publisher: American Public Health Association
Date: 09-2010
Abstract: Objectives. We determined whether exposure to family poverty over a child's early life course predicts adolescent and young adult anxiety and depression. Methods. We used a birth cohort study of a s le of women in Brisbane, Australia, who were recruited in early pregnancy and whose children were followed up on at ages 14 and 21 years. Some 2609 mothers and adolescents provided usable data at the 14- and 21-year follow-ups. Results. After adjustment for poverty at other phases, poverty at the 14-year follow-up was the strongest predictor of adolescent and young adult anxiety and depression. The more frequently the child was exposed to poverty, the greater was the risk of that in idual being anxious and depressed at both the 14- and 21-year follow-ups. Conclusions. Family poverty predicts higher rates of adolescent and young adult anxiety and depression. Increased frequency of child exposure to poverty is a consistent predictor of adolescent and young adult anxiety and depression. Repeated experiences of poverty over a child's early life course are associated with increased levels of poor mental health.
Publisher: Informa UK Limited
Date: 12-10-2010
DOI: 10.3109/00952990.2010.500438
Abstract: There is shortage of evidence about the relationship between use of cannabis and obesity. This study aimed to examine the association between cannabis use and overweight/obesity in young adults. Data were from a 21-year follow-up of mothers and their children recruited into the Mater-University of Queensland Study of Pregnancy (MUSP), a longitudinal pre-birth cohort. The study is based on 2566 young adults (1264 males and 1302 females) who had data available on cannabis use and age of initiation to use of cannabis and BMI at the 21-year follow-up (MUSP children). Those who did not provide data on cannabis use and BMI were excluded from the analysis. Frequency of cannabis use and body mass index (BMI) was assessed at the 21-year follow-up. Potential confounders were prospectively measured between the child's birth and the 21-year follow-up. Some 50.9% of young adults reported use of cannabis in the last month or year and 34.1% had BMI ≤ 25. Multivariate analysis showed that those who had used cannabis were less likely to be categorised in the BMI ≥ 25 group with the least prevalence of overweight/obesity being observed in every day cannabis users (odds ratio = .2 95% confidence interval [CI]:.1-.4). The existing data suggest lower prevalence of overweight and obesity among young adult cannabis users. Further research is needed to examine the mechanism of this association.
Publisher: American Society of Tropical Medicine and Hygiene
Date: 09-2010
Publisher: Hindawi Limited
Date: 2017
DOI: 10.1155/2017/2019404
Abstract: We study the performance of the secondary relay system in a power-beacon (PB) assisted energy harvesting cognitive relay wireless network. In our system model, a secondary source node and a relay node first harvest energy from distributed PBs. Then, the source node transmits its data to the destination node with the help of the relay node. Also, fading coefficients of the links from the PBs to the source node and relay node are assumed independent but not necessarily identically distributed (i.n.i.d) Nakagami- m random variables. We derive exact expressions for the power outage probability and the channel outage probability. Based on that, we analyze the total outage probability of the secondary relay system. Asymptotic analysis is also performed, which provides insights into the system behavior. Moreover, we evaluate impacts of the primary network on the performance of the secondary network with respect to the tolerant interference threshold at the primary receiver as well as the interference introduced by the primary transmitter at the secondary source and relay nodes. Simulation results are provided to validate the analysis.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2022
Publisher: Elsevier BV
Date: 11-2010
Publisher: Wiley
Date: 13-05-2010
DOI: 10.1111/J.1365-2702.2009.03015.X
Abstract: Aims. To determine the influence of breastfeeding on overweight and obesity, as determined by body mass index in early adulthood. Background. Obesity is a contemporary epidemic and linked to increased risk of later cardiovascular disease and type 2 diabetes. The success of long‐term treatment is modest. Protective factors, such as potentially, and breastfeeding, are few and very important. There are uncertainties as to whether breastfeeding has a protective effect, especially in adults, or whether it is a reflection of other markers of obesity that are more linked to cardiovascular disease and diabetes risk. Some studies suggest that breastfeeding is protective in later life for cardiovascular disease and atherosclerosis. Design. Epidemiological analysis of longitudinal data set. Methods. We collected data about breastfeeding duration, body mass index of children at 21 years and confounding variables from an ongoing longitudinal study of a singleton birth cohort of 7223 children in Brisbane. We assessed the duration of breastfeeding at six months and prevalence of overweight and obesity at 21 years by body mass index. Adjustment for potential confounders was by multivariable multinomial logistic regression. Results. Data were available for 2553 young adults. In neither the unadjusted or adjusted analysis was longer duration of breastfeeding associated with reduction in obesity at 21 years. Conclusions. Findings of this investigation are consistent with breastfeeding not independently affecting body mass index in young adults. Relevance to clinical practice. Breastfeeding has a range of important benefits for infants, mothers and families, although duration of breastfeeding may not play a substantial role in preventing adult onset obesity.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: Wiley
Date: 03-2010
DOI: 10.1002/IJC.25277
Abstract: Although sun exposure is known to be associated with basal cell carcinoma (BCC), it is not known what determines multiple occurrences of BCCs among sporadically affected in iduals or why BCCs develop on uncommonly sun-exposed body sites like the trunk. In a prospective community-based skin cancer study in Queensland, Australia, we studied all participants who experienced a histologically confirmed BCC from 1992 to 2007. Sun exposure history was monitored, and dermatologists documented phenotype at baseline and signs of photodamage over the study period. Anatomic sites of all incident BCCs were recorded. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated using logistic regression. Of 401 participants who developed a new BCC during the 16 years of follow-up, 232 (58%) developed more than 1. Male sex (OR = 2.5, 95% CI 1.5-5.3) and age 60 or over (OR = 4.2, 95% CI 1.5-11.8) but not skin type were associated with highest BCC counts among those affected. Participants with high numbers of solar keratoses were most likely to experience the highest BCC counts overall (OR = 4.3, 95% CI 1.4-13.5). Moreover, occurrences of BCC on the trunk (OR = 3.3, 95% CI 1.4-7.6) and on the limbs (OR = 3.7, 95% CI 2.0-7.0) were strongly associated with high numbers of solar keratoses on these sites, respectively. Among those newly affected by BCC, chronic cutaneous sun damage predicts those who will be affected by more than 1 BCC, while chronic sun damage on the trunk and limbs predicts BCC occurrence on the trunk and limbs, respectively.
Location: Viet Nam
No related grants have been discovered for Ngoc Phuc Le.