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Characterization of time-and size-dependent particle emissions and decay from cooking oil fumes in residence:Impacts of various intervention measures

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Building Simulation 2023年第7期16卷 1149-1158页

作者： Jianbang Xiang Linmin Hu Jiayuan Hao Siqing Wu Jianping Cao edmund seto School of Public Health(Shenzhen) Sun Yat-sen UniversityShenzhenGuangdong 518107China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Division of Environmental Health University of Southern CaliforniaLos AngelesCA 90032USA School of Medicine Sun Yat-sen UniversityShenzhenGuangdong 518107China School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhouGuangdong 510006China Department of Environmental and Occupational Health Sciences University of WashingtonSeattleWA 98195USA

The dynamic characteristics of cooking-related particle size distributions in real-world settings are not fully *** a real-world campaign in a naturally-ventilated apartment in the northwest US,this study investigates the temporal profiles of size-resolved particle number concentrations(PNCs)ranging from 0.3 to 10µm from frying cooking *** cooking scenarios included various combinations of window ventilation,venting range hood(VRH)use,and portable air cleaner(PAC)*** a standardized pan-frying protocol throughout seven scenarios,real-time PNCs of 16-size bins were measured in the *** PNCs were empirically compared among size bins,periods,and *** most abundant size ranges of cooking-related particles were 0.3–0.579µm in number(45%–71%of the total)and 2.685–5.182µm in mass(48%–57%of the total).Compared with the scenario without any cooking-fume mitigating measures,keeping the kitchen windows open reduced the mean PNCs during and within 1-h after cooking for PM_(0.3-2.5),PM_(2.5-10),and PM_(0.3-10)by 78%,92%,and 79%,*** contrast,utilizing a VRH during cooking reduced the corresponding levels by 21%,69%,and 25%,*** with running the VRH,using a PAC in the kitchen led to additional reductions of 84%,88%,and 84%,***,the removal efficiencies of the three strategies generally increased with particle sizes.

关键词： cooking oil fumes size-resolved particles venting range hood window ventilation portable air cleaner

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遥感用于鄱阳湖区钉螺孳生地的监测(英文)

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中国寄生虫学与寄生虫病杂志 2002年第4期20卷 205-208,F003页

作者：伍卫平 George Davis 刘红云 edmund seto 吕尚标张晶华政辉郭家钢林丹丹陈红根 Peng Gong 冯正中国疾病预防控制中心寄生虫病预防控制所 Department of Microbiology and Tropical Medicine 江西寄生虫病研究所南昌330046 School of Public Health Center for Assessment and Monitoring of Forest and Environm ental Re-sources

目的　结合遥感技术和地面生态学调查数据区分钉螺孳生地并监测其变化。　方法　从鄱阳湖共选择10 0个调查点 ,75个为从鄱阳湖 5 74块草洲中随机抽取。根据历史调查 (1982～ 1984 ) ,其中 5 0个有螺 ,2 5个无螺 ,另2 5个为非钉螺孳生地... 详细信息

目的　结合遥感技术和地面生态学调查数据区分钉螺孳生地并监测其变化。　方法　从鄱阳湖共选择10 0个调查点 ,75个为从鄱阳湖 5 74块草洲中随机抽取。根据历史调查 (1982～ 1984 ) ,其中 5 0个有螺 ,2 5个无螺 ,另2 5个为非钉螺孳生地调查点。将每个调查点 (面积 10 0 0 0 m2 )分成 10 0格 ,从中随机抽取 2 0格 ,在每格的中央置钉螺调查框 (4m2 ) ,收集框内所有钉螺。收集与地面调查同期的 TM卫片。采用非监督分类法对卫片进行分类并结合地面调查结果区分钉螺孳生地。　结果　分类的敏感性和特异性分别为 90 .0 %～ 95 .6 %和 6 1.1%～ 6 8.6 %。 1999～ 2 0 0 0年 ,鄱阳湖区估算的钉螺孳生地面积变幅为 6 2 3.4～ 76 2 .8km2。　结论　钉螺孳生地与植被覆盖的区域有关 ,卫片分类能用于区分钉螺孳生地确定其范围并监测其随关键因素的波动而造成的变化。

关键词：钉螺孳生地遥感监测鄱阳湖血吸虫病疾病预防

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西昌邛海血吸虫病流行区沼气建设及使用情况

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中国血吸虫病防治杂志 2008年第3期20卷 230-230,232页

作者：陈琳 edmund seto Justin Remais 张奕赵联国 Elizabeth Carlton 钟波 Robert C. Spear 四川省疾病预防控制中心成都610041 School of Public Health University of CaliforniaBerkeley 四川省凉山彝族自治州西昌市血吸虫病防治站

目的了解西昌邛海周边血吸虫病重流行区沼气建设使用情况及农户接受程度。方法用问卷调查方式随机抽查10个自然村的254户,了解有关沼气修建、使用、农户接受程度等情况;访谈43名居民,了解其对沼气建设的态度。结果已建沼气户仅占20.5%,... 详细信息

目的了解西昌邛海周边血吸虫病重流行区沼气建设使用情况及农户接受程度。方法用问卷调查方式随机抽查10个自然村的254户,了解有关沼气修建、使用、农户接受程度等情况;访谈43名居民,了解其对沼气建设的态度。结果已建沼气户仅占20.5%,建沼气户与未建户的年经济收入差异无统计学意义(t=0.354,P>0.05);96.2%建沼气户表示满意;农户对政府补助有较严重的依赖性。结论尽管农户对沼气建设有良好的认同,但沼气池的推广还需进一步加强,农户对沼气修建与寄生虫病流行关系的认识以及使用沼气的习惯,尚待进一步提高和改善。

关键词：血吸虫病沼气建设健康教育

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饮料消费验证研究

饮料消费验证研究

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第十二届全国营养科学大会

作者：臧嘉捷宋峻汪正园姚春霞马建红黄翠花朱珍妮 Lindsey P.Smith Shufa Du Jenna Hua edmund seto Barry Popkin 邹淑蓉上海市疾病预防控制中心上海市松江区疾病预防控制中心上海市普陀区疾病预防控制中心美国北卡罗来纳大学教堂山分校美国加州大学伯克利分校

目的人群营养正朝高能量膳食、低体力活动的方向变迁,营养相关慢性非传染性疾病发病率的升高与这一营养变迁密切相关。其中含糖饮料的消费与肥胖、II型糖尿病及心血管疾病有关,但目前含糖饮料消费存在矛盾,即饮料销售量急剧增长,但膳食... 详细信息

目的人群营养正朝高能量膳食、低体力活动的方向变迁,营养相关慢性非传染性疾病发病率的升高与这一营养变迁密切相关。其中含糖饮料的消费与肥胖、II型糖尿病及心血管疾病有关,但目前含糖饮料消费存在矛盾,即饮料销售量急剧增长,但膳食调查数据显示饮料消费量很低。目前主要采用3天24小时膳食回顾调查短期食物及饮料消费情况,这种方法比较准确可靠,但可能遗漏或低估摄入水平,尤其是可能遗漏消费频率不高的饮料。智能手机技术的发展,可以很容易地通过影像或者声音记录事情的过程,可能为饮料摄入评估提供新的思路。然而,此种方法在人群中开展膳食调查是否适用,能否加强记忆、降低24小时回顾的遗漏还不清楚。本研究目的为:1)比较用手机法24小时回顾调查(SA-24R)与填表法24小时回顾调查(WA-24R)收集的饮料消费情况的差异;2)收集部分人24小时尿样,比较不同方法得到的饮料消费量与尿量的相关性,验证不同方法准确性;3)比较新的饮料频率表与传统频率问卷对饮料消费量或频率的检出率。方法本研究采用交叉设计,纳入上海城乡居民各60名,共120名调查对象,分别分为两组,一组先进行手机法调查一周后进行传统填表法调查;另一组顺序相反。对所有调查对象进行基本情况调查及体格检查、手机法膳食调查、填表法膳食调查、饮料频率调查及手机可行性调查,收集部分调查对象24小时尿液。结果随机化分组的120人中有3人由于不符合纳入标准排除,7人未完成调查,最终分析共纳入110人。该人群消费的饮料主要分为9种,分别为:传统的无能量饮料,如白水、茶等;瓶装无能量饮料,如瓶装水、无糖可乐等;100%果汁;牛奶(不添加糖);苏打和软饮料;茶和咖啡(含糖);果汁饮料(含糖);牛奶(含糖);酒精饮料。手机法与填表法两者总饮料消费量的相关系数为0.60(P<0.01),其中各类饮料两种方法的相关性基本均有意义。手机法较填表法总饮料摄入量低222g/d,其中水、茶等无能量饮料相差-229g/d.尿液分析也发现手机法得到的饮料摄入量较24小时尿量少,现象不合理;而填表法得到的饮料摄入量较24小时尿量多,现象合理。提示手机法存在低估的情况。手机可行性分析发现:46%的人报告用手机拍摄容易感到尴尬、43%的人认为手机法耗时、57%的人更愿意拍照片。频率问卷估计得出的饮料摄入量与两种方法的一致性均在60-80%之间,该指标在60-80%之间是具有较高的一致性。结论手机法对饮料摄入的评估与填表法具有相关性,但未能发现手机法能够提高饮料摄入评估,其中调查对象工作量大、拍摄过程复杂、耗时可能是导致低估的原因。新饮料频率问卷能够较真实的反应饮料的摄入。

关键词：智能手机膳食调查

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Electrical stimulation for brighter persistent luminescence

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Light(Science & Applications) 2024年第8期13卷 1590-1601页

作者： Xilin Ma Yuhua Wang Takatoshi seto Key Laboratory for Special Function Materials and Structural Design of the Ministry of Education National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology of National Development and Reform CommissionDepartment of Materials ScienceSchool of Materials and EnergyLanzhou UniversityNo.222South Tianshui RoadLanzhouGansu 730000China

An immature understanding of the mechanisms of persistent luminescence(PersL)has hindered the development of new persistent luminescent materials(PersLMs)with increased *** this regard,in-situ direct current(DC)electric field measurements were conducted on a layered structure composed of the SrAl_(2)O_(4):Eu^(2+),Dy^(3+)phosphor,and an *** this study,the photoluminescence(PL)and afterglow properties were investigated with respect to voltage by analyzing the current signal and thermoluminescence(TL)*** intensity of PersL increased due to a novel phenomenon known as“external electric field stimulated enhancement of initial brightness of afterglow”.This dynamic process was illustrated via the use of a rate equation approach,where the electrons trapped by the ultra-shallow trap at 0.022 eV could be transferred through the conduction band during long *** afterglow intensity could reach 0.538 cdm^(-2)at a 6 V electric *** design of an electric field stimulation technique enables the enhancement of the intensity of PersLMs and provides a new perspective for exploring the fundamental mechanics of certain established PersLMs.

关键词： spectroscopy luminescence conduction

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Periodical shedding of cloud cavitation from a single hydrofoil in high-speed cryogenic channel flow

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Journal of Thermal Science 2009年第1期18卷 58-64页

作者： Yutaka ITO Koichi seto Takao NAGASAKI Tokyo Institute of Technology

In order to explain criteria for periodical shedding of the cloud cavitation, flow patterns of cavitation around a piano-convex hydrofoil were observed using a cryogenic cavitation tunnel of a blowdown type. Two hydrofoils of similarity of 20 and 60 mm in chord length with two test sections of 20 and 60 mm in width were prepared. Working fluids were water at ambient temperature, hot water and liquid nitrogen. The parameter range was varied between 0.3 and 1.4 for cavitation number, 9 and 17 m/sec for inlet flow velocity, and -8° and 8° for the flow incidence angle, respectively. At incidence angle 8°, that is, the convex surface being suction surface, periodical shedding of the whole cloud cavitation was observed on the convex surface under the specific condition with cavitation number and inlet flow velocity, respectively, 0.5, 9 m/sec for liquid nitrogen at 192℃ and 1.4, 11 m/sec for water at 88℃, whereas under the supercavitation condition, it was not observable. Periodical shedding of cloud cavitation occurs only in the case that there are both the adverse pressure gradient and the slow flow region on the hydrofoil.

关键词： cloud cavitation cryogen visualization hydrofoil

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Chronic hepatitis B and metabolic risk factors:A call for rigorous longitudinal studies

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World Journal of Gastroenterology 2019年第3期25卷 282-286页

作者： Wai-Kay seto Department of Medicine the University of Hong Kong Queen Mary Hospital Department of Medicine the University of Hong Kong-Shenzhen Hospital State Key Laboratory for Liver Research the University of Hong Kong

Long-term nucleos(t)ide analogue therapy in chronic hepatitis B virus(HBV)infection is effective in suppressing viral replication and reducing liver-related complications. However, HBV-related liver events can still occur in different patient sub-groups. There is emerging evidence that, similar to chronic hepatitis C virus infection, metabolic risk factors may play a role in the disease process of chronic HBV. While the mechanistic nature of metabolic-HBV interactions remains uncertain, studies in different HBV-infected populations have demonstrated that hepatic steatosis, increased body-mass index, diabetes, or a combination of different metabolic risk factors are associated with an increased risk of hepatocellular carcinoma and cirrhosis. The impact of metabolic risk factors is especially prominent in patients with quiescent virological activity,including on-treatment patients with effective viral suppression. As the proportion of on-treatment chronic HBV patients increases worldwide,longitudinal studies determining the relative risks of different metabolic parameters with respect to clinical outcomes are needed. Future studies should also determine if metabolic-directed interventions can improve disease outcomes in chronic HBV.

关键词： Hepatitis B virus Diabetes Obesity Steatosis Non-alcoholic fatty liver disease Body-mass index

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Quality assessment of volunteered geographic information for outdoor activities:an analysis of OpenStreetMap data for names of peaks in Japan

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Geo-Spatial Information Science 2023年第3期26卷 333-345页

作者： Jun Yamashita Toshikazu seto Nobusuke Iwasaki Yuichiro Nishimura Faculty of Social and Cultural Studies Kyushu UniversityFukuokaJapan Faculty of Letters Komazawa UniversityTokyoJapan Sciences NAROInstitute for Agro-EnvironmentalTsukubaJapan Faculty of Letters Nara Women’s UniversityNaraJapan

Geographical studies of outdoor activities have increased in recent years with the rise in popularity of these activities worldwide,including in *** geographic information(VGI)is a key tool for organizing outdoor activities as it offers a means to determine the locational information and names of *** evaluate the quality of VGI,geospatial data generated by land survey agencies and other VGI are often utilized as reference ***,since these reference data may not be available,other methods are necessary to assure the quality of *** this study,we examined five trust indicators based on the inherent characteristics of VGI through an empirical case *** used mountain names extracted from OpenStreetMap in Japan as data because there were almost no other VGI in the *** a result,we isolated three trust indicators,namely versions,users,and tag corrections,to examine the thematic accuracy of VGI because these were the only statistically significant ***,we found that the prediction rate of thematic accuracy was very *** improve thematic accuracy,this study recommends using the most accurate versions,applying correctly given tags,and considering the motivations and characteristics of the VGI contributors.

关键词： Outdoor activities volunteered geographic information(VGI) OpenStreetMap(OSM) data quality assessment trust integrated usage

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Krein space representation and Lorentz groups of analytic Hilbert modules

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Science China Mathematics 2018年第4期61卷 745-768页

作者： Yue Wu Michio seto Rongwei Yang School of Insurance Central University of Finance and EconomicsBeijing 100081China National Defense Academy Yokosuka 239-8686Japan Department of Mathematics State University of New York at AlbanyAlbanyNY 12222USA

This paper aims to introduce some new ideas into the study of submodules in Hilbert spaces of analytic functions. The effort is laid out in the Hardy space over the bidisk H^2(D^2). A closed subspace M in H^2(D^2) is called a submodule if ziM ? M(i = 1, 2). An associated integral operator(defect operator) CM captures much information about M. Using a Kre??n space indefinite metric on the range of CM, this paper gives a representation of M. Then it studies the group(called Lorentz group) of isometric self-maps of M with respect to the indefinite metric, and in finite rank case shows that the Lorentz group is a complete invariant for congruence relation. Furthermore, the Lorentz group contains an interesting abelian subgroup(called little Lorentz group) which turns out to be a finer invariant for M.

关键词： submodules Krein spaces reproducing kernels defect operators Lorentz group little Lorentz group

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Advanced HSLA Steels for Automotive Use

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Journal of Iron and Steel Research International 2011年第S1期18卷 49-56页

作者： Sekita Takashi seto Kazhiro Funakawa Yoshimasa Steel Research Laboratories JFE Steel Corporation260-0835ChibaJapan Steel Research Laboratories JFE Steel Corporation210-0855KawasakiJapan

Characteristic HSLA steels for automotive use are introduced in which both of precipitation and microstructure is controlled to obtain suitable mechanical *** outer panels such as fender,the combination of low yield strength,high tensile strength and deep-drawability were realized by controlling the distribution of NbC and precipitation free *** other steel,developed for chassis parts such as lower arm,utilizes extremely fine interphase precipitation to obtain high yield strength and excellent hole *** steels have contributed to the reduction of weight in car body.

关键词： precipitation free zone (PFZ) deep drawability interphase precipitation hole expansionability yield strength

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