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Numerical Heat Transfer Modelling for Rapid Impact Assessment of limiting Thermostat Reliability on Fuel-Oil Burner Pre-Heaters： A Case study

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Journal of Environmental science and Engineering(A) 2016年第6期5卷 298-311页

作者： bans Elbuken Heating Division Alarko Carrier Research and Development Center GOSB Gebze 41480 Kocaeli Turkey

In this paper, the impact of limiting thermostat on the rupture event occuring in Fuel-Oil burner fuel pre-heaters＇ resistant （heat generating） wires is inspected numerically. Gaseous fuel content in the pipeline has also been issued as a possibility. Heater＇s inner temperature distributions have been simulated by an in-house MATrix lABoratory （MATlAB） script in order to understand the resistant wire exposure to high temperatures by numerous scenarios. It is concluded that the effect of fuel flowrate is not a major effect on the wires＇ fate because of the limiting thermostat co-working. The main difference between the calculations is the effect of thermostat cut off function. The numerical simulations enlightened the dominant effect of thermostat sensing delay, so the overheating event. Intolerable delay results with a quick drop in the thermal efficiency and an increased possibility on wire rupture due to overheating which means a burner malfunction. Referring to the first numerical simulation results, a distributed and reduced heat flux was implemented with the same fluid and thermodynamic properties on a revised pre-heater model with an increased heater plate. The increment, thus the reduction on the heat flux of the ribbon wires has been noted as the key for safe operation.

关键词： Fuel oil burner numerical simulations resistant wires rupture thermostat delay.

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Gastrointestinal tract(gut) health in the young pig

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Animal Nutrition 2018年第2期4卷 187-196页

作者： John R.Pluske Diana l.Turpin Jae-Cheol Kim school of Veterinary and life sciences Murdoch University Pork Innovation Western Australia(Inc.) AB Vista Asia Pte.ltd

An optimally functioning gastrointestinal tract(GIT) clearly is of importance to the overall metabolism,physiology, disease status and performance of pigs of all stages of growth and ***, the‘health’ of the GIT(‘gut health’) has attracted much attention despite the lack of a clear definition to the term or its aetiology, although in broad terms, ‘gut health’ encompasses a number of physiological and functional features including nutrient digestion and absorption, host metabolism and energy generation, a stable and appropriate microbiota/microbiome, defence mechanisms including barrier function and mucosal immune mechanisms, and the interactions between these components.‘Gut health’ in the newlyweaned(young) pig is of obvious interest due to changes in GIT structure and function associated with the post-weaning transition, and more recently to the upsurge in interest in different feed additives as dietary alternatives/replacements caused by bans/reductions in certain antimicrobial compounds being available in some parts of the *** the presence of enteric disease(s) after weaning, a deterioration in ‘gut health’ may be synonymous to the overall health of the pig, and although some direct relationships can be drawn between pig performance and efficiency and a ‘healthy' GIT, sometimes this connection is subtler and less obvious, especially in the absence of overt enteric disease(s).The factors and conditions involved in ‘gut health’ are multifactorial, complex, often poorly described and sometimes incorrectly interpreted,although it is evident that perturbations of the GIT can cause an imbalance and disturb the generalized *** addition to any enteric diseases or conditions that might arise as a result of these disturbances, other influences will also impact such as the responses occurring in the GIT in the period immediately after weaning, any changes that might occur after a change in diet, and(or) disruptions to meal patterns and hence

关键词： Gastrointestinal tract Gut health structure and function Pig Piglet Weaning

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Detection of novel brominated flame retardants (NBFRs) in the urban soils of Melbourne, Australia

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Emerging Contaminants 2017年第1期3卷 23-31页

作者： Thomas J.McGrath Paul D.Morrison Andrew s.Ball Bradley O.Clarke school of science Centre for Environmental Sustainability and RemediationRMIT UniversityGPO Box 2476MelbourneVictoria 3001Australia Australian Centre for Research on separation science(ACROss) School of ScienceRMIT UniversityGPO Box 2476MelbourneVictoria 3001Australia

A range of brominated flame retardants(BFRs)have been incorporated into polymeric materials like plastics,electronic equipment,foams and textiles to prevent *** most common of these,polybrominated diphenyl ethers(PBDEs),have been subject to legislated bans and voluntary withdrawal by manufacturers in North America,Europe and Australia over the past decade due to long-range atmospheric transport,persistence in the environment,and *** has shown that replacement novel brominated flame retardants(NBFRs)are released to the environment by the same mechanisms as PBDEs and share similar hazardous *** objective of the current research was to characterize soil contamination by NBFRs in the urban soils of Melbourne,Australia.A variety of industrial and nonindustrial land-uses were investigated with the secondary objective of determining likely point sources of *** NBFRs;pentabromotoluene(PBT),pentabromoethylbenzene(PBEB),hexabromobenzene(HBB),2-ethylhexyl-2,3,4,5-tetrabromobenzoate(EH-TBB),1,2-bis(2,4,6-tribromophenoxy)ethane(BTBPE)and decabromodiphenyl ethane(DBDPE)were measured in 30 soil samples using selective pressurized liquid extraction(s-PlE)and gas chromatography coupled to triple quadrupole mass spectrometry(GC-Ms/Ms).NBFRs were detected in 24/30 soil samples with s5NBFR concentrations ranging from nd-385 ng/g *** was the most frequently detected compound(14/30),while the highest concentrations were observed for DBDPE,followed by *** waste recycling and polymer manufacturing appear to be key contributors to NBFR soil contamination in the city of Melbourne.A significant positive correlation between s8PBDEs and s5NBFR soil concentrations was observed at waste disposal sites to suggest that both BFR classes are present in Melbourne's waste streams,while no association was determined among manufacturing *** research provides the first account of NBFRs in Australian soils and indicates that these emerging con

关键词： Novel brominated flame retardants(NBFRs) Persistent organic pollutants(POPs) land contamination soil

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Viewers＇ Perception of TV Ads： The Role of sex Appeal

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Psychology Research 2012年第8期2卷 452-460页

作者： s. Thiyagarajan P. shanthi G. Naresh Department of International Business Pondicherry University. Department of Commerce Guru Nanak College Department of Commerce Pondicherry University-Karaikal Centre.

sex appeal is on its way to pop up Indian advertising industry and its impact on the target audience"s perception has gained less academic attention. The question which seems to be less addressed in literature is that sex appeal will be an effective and a worthy tool of promotion in a market place, like India where stringent regulatory measures are in place and controversies and bans over such appeal in ads (advertisements) are quite common. The present study investigated the youth"s general perception towards the use of sexual appeal in advertising and its influence on effectiveness of ads. General linear model was applied to study the effect of perception on effectiveness of different sexual appeals. The results suggest that there is an influence of perception on ads effectiveness at the multivariate level.

关键词：电视广告性感目标受众监管措施影响效果模型应用广告效果学术界

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台州、大理农村5岁以下儿童家庭二手烟暴露情况与影响因素分析

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中国健康教育 2021年第3期37卷 239-243页

作者：何静怡郑频频潘姿娴陈潇潇肖霞郝伟林海江 Abu s Abdullah 复旦大学公共卫生学院上海200032 昆山杜克大学全球健康研究中心江苏昆山215347 台州市疾病与预防控制中心浙江台州318000 昆明医科大学公共卫生学院云南昆明650500 杜克大学全球健康研究所美国北卡罗莱纳州达勒姆27710 波士顿大学医学院波士顿医学中心美国马萨诸塞州波士顿02118

目的了解台州、大理农村地区5岁以下儿童家庭二手烟的暴露情况并探索其影响因素,为制定减少儿童家庭二手烟暴露的干预措施提供科学依据。方法2018年4-6月期间采用多阶段随机抽样的方法,对台州与大理所属农村地区与5岁以下儿童共同居住... 详细信息

目的了解台州、大理农村地区5岁以下儿童家庭二手烟的暴露情况并探索其影响因素,为制定减少儿童家庭二手烟暴露的干预措施提供科学依据。方法2018年4-6月期间采用多阶段随机抽样的方法,对台州与大理所属农村地区与5岁以下儿童共同居住的吸烟者进行一对一问卷调查,最终获得658份有效问卷。结果与吸烟者共同居住的农村儿童家庭二手烟暴露率为59.4%;多因素分析显示,与无吸烟规定相比,家庭室内完全禁止吸烟(OR=0.62,95%CI:0.39~0.99)可降低儿童家庭二手烟暴露风险;吸烟者年龄在30岁以下(OR=3.74,95%CI:1.99~7.04)、家庭月收入3000元以下(OR=1.91,95%CI:1.33~2.73)、吸烟者对尼古丁的依赖在中度及以上时(OR=2.06,95%CI:1.46~2.92)可增加儿童家庭二手烟暴露风险;此外,其他家人吸烟(OR=1.53,95%CI:1.09~2.15)与访客吸烟(OR=1.75,95%CI:1.19~2.58)也可使儿童家庭二手烟暴露风险增加。结论台州、大理农村地区5岁以下儿童家庭二手烟暴露情况较严重,帮助吸烟者戒烟、建立家庭室内吸烟规定是保护儿童免遭家庭二手烟暴露的有效手段。

关键词：农村地区家庭吸烟规定儿童二手烟暴露

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