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Steven Duret Hong‐Minh Hoang Evelyne Derens‐Bertheau Anthony Delahaye Onrawee Laguerre Laurent Guillier 《Risk analysis》2019,39(4):906-925
The preservation of perishable food via refrigeration in the supply chain is essential to extend shelf life and provide consumers with safe food. However, electricity consumed in refrigeration processes has an economical and an environmental impact. This study focuses on the cold chain of cooked ham, including transport, cold room in supermarket, display cabinet, transport by consumer, and domestic refrigerator, and aims to predict the risk for human health associated with Listeria monocytogenes, the amount of food wasted due to the growth of spoilage bacteria, and the electrical consumption to maintain product temperature through the cold chain. A set of eight intervention actions were tested to evaluate their impact on the three criteria. Results show that the modification of the thermostat of the domestic refrigerator has a high impact on food safety and food waste and a limited impact on the electrical consumption. Inversely, the modification of the airflow rate in the display cabinet has a high impact on electrical consumption and a limited impact on food safety and food waste. A cost–benefit analysis approach and two multicriteria decision analysis methods were used to rank the intervention actions. These three methodologies show that setting the thermostat of the domestic refrigerator to 4 °C presents the best compromise between the three criteria. The impact of decisionmaker preferences (criteria weight) and limitations of these three approaches are discussed. The approaches proposed by this study may be useful in decision making to evaluate global impact of intervention actions in issues involving conflicting outputs. 相似文献
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Canh V. Pham My T. Thai Hieu V. Duong Bao Q. Bui Huan X. Hoang 《Journal of Combinatorial Optimization》2018,35(4):1202-1240
Online social networks have become popular media worldwide. However, they also allow rapid dissemination of misinformation causing negative impacts to users. With a source of misinformation, the longer the misinformation spreads, the greater the number of affected users will be. Therefore, it is necessary to prevent the spread of misinformation in a specific time period. In this paper, we propose maximizing misinformation restriction (\(\mathsf {MMR}\)) problem with the purpose of finding a set of nodes whose removal from a social network maximizes the influence reduction from the source of misinformation within time and budget constraints. We demonstrate that the \(\mathsf {MMR}\) problem is NP-hard even in the case where the network is a rooted tree at a single misinformation node and show that the calculating objective function is #P-hard. We also prove that objective function is monotone and submodular. Based on that, we propose an \(1{-}1/\sqrt{e}\)-approximation algorithm. We further design efficient heuristic algorithms, named \(\mathsf {PR}\)-\(\mathsf {DAG}\) to show \(\mathsf {MMR}\) in very large-scale networks. 相似文献
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Hoang Huu Phe 《Habitat International》2002,26(4)
The advent of “Doi Moi” (renovation) in Vietnam has brought in a hitherto implicit residential property market. The dynamics of residential markets in Central Hanoi is a result of actions by groups trying to improve their properties following different investment strategies. A taxonomy of home improvers reveals three main types: the improver-consumerists, the improver-turned-dealers and the aspiring improvers. Their actions within the changing institutional framework is conceptualised in a dynamic model that could be a convenient tool for analysis of the residential property market. 相似文献
24.
Ha Hoang Quynh Le Daniel Terry 《Women and birth : journal of the Australian College of Midwives》2014,27(1):9-14
ObjectivesThis study investigates (i) maternity care access issues in rural Tasmania, (ii) rural women's challenges in accessing maternity services and (iii) rural women's access needs in maternity services.MethodsA mixed-method approach using a survey and semi-structured interviews was conducted. The survey explored women's views of rural maternity services from antenatal to postnatal care, while interviews reinforced the survey results and provided insights into the access issues and needs of women in maternity care.FindingsThe survey was completed by n = 210 women, with a response rate of 35%, with n = 22 follow-up interviews being conducted. The survey indicated the majority of rural women believed antenatal education and check-ups and postnatal check-ups should be provided locally. The majority of women surveyed also believed in the importance of having a maternity unit in the local hospital, which was further iterated and clarified within the interviews. Three main themes emerged from the interview data, namely (i) lack of access to maternity services, (ii) difficulties in accessing maternity services, and (iii) rural women's access needs.ConclusionThe study suggested that women's access needs are not fully met in some rural areas of Tasmania. Rural women face many challenges when accessing maternity services, including financial burden and risk of labouring en route. The study supports the claim that the closure of rural maternity units shifts cost and risk from the health care system to rural women and their families. 相似文献
25.
Lena M. Banks Matthew Walsham Hoang Van Minh Doan Thi Thuy Duong Tran Thu Ngan Vu Quynh Mai Karl Blanchet Hannah Kuper 《International social security review》2019,72(1):59-82
Although people with disabilities are frequently targeted as key beneficiaries of social protection, little is known on their access to existing programmes. This study uses mixed methods to explore participation in disability‐targeted and non‐targeted social protection programmes in Viet Nam, particularly in the district of Cam Le. In this district, social assistance and health insurance coverage among people with disabilities was 53 per cent and 96 per cent respectively. However, few accessed employment‐linked social insurance and other disability‐targeted benefits (e.g. vocational training, transportation discounts). Factors affecting access included the accessibility of the application process, disability assessment procedures, awareness and the perceived utility of programmes, and attitudes on disability and social protection. 相似文献
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Bias and mean squared error for linear combinations of the isotonic regression estimators are computed. The case of sampling three distinct populations and the case of sampling seven or fewer populations having common mean are studied in detail. Numerical results are given, and comparisons between isotonic and unbiased estimation procedures are made. 相似文献
28.
Le Trinh Hai Pham Hoang Hai Pham Thi Thu Ha Nguyen Manh Ha Ly Trong Dai Pham Viet Hoa Nguyen Cao Huan Lai Vinh Cam 《Social indicators research》2014,116(3):661-679
Sustainable Development is a broad and universal concept. Indicators are a basis to measure sustainability and to direct policies that aim to achieve a better quality of life. Thai Binh, a coastal province in North Vietnam is strongly concerned about strategic sustainability development. To select a system of sustainability indicators, the Delphi method was applied in 2012. A two-round questionnaire was organized to use with 32 experts, who acted as participants. 69 indicators were selected from 98 listed indicators: 15 related to economic development, 5 to the sea and coastal zone, 1 to the global economic partnership, 4 to consumption and production patterns, 7 to poverty, 3 to governance, 9 to health, 4 to education, 3 to demographics, 2 to natural hazards, 5 to atmosphere, 7 to land, and 3 to freshwater. Conversely, 29 other indicators were rejected. The Delphi method allows indicator selection for identification of the process of sustainability. The system of indicators, as the first important step of the sustainable development process, provides useful information for decision makers and planners as well sustainability strategy. It is planned that the indicators selected should be applied in the province. 相似文献