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An evaluation of visual and m.asurem.nt-based m.thods for estim.ting deposited fine sedim.nt

International Journal of Sedim.nt Research 2016年第4期31卷 368-375页

作者： Elizabeth Conroy jonathan n.turner Anna Rym.zewicz m.chael Bruen John J.O'Sullivan m.ry Kelly-Quinn School of Biology and Environm.ntal Science University College Dublin School of Geography Planning and Environmental PolicyUniversity College Dublin UCD Dooge Centre for Water Resources Research School of CivilStructural and Environmental EngineeringUCD Earth InstituteUniversity College Dublin

A wide range of m.thods are com.only used to m.asure deposited fine sedim.nt and quantify substrate quality in rivers as part of bioassessm.nt or m.nitoring *** this laboratory-based experim.nt known am.unts of three sedim.nt types(sand,topsoil,peat) were added to m.socosm. and four m.thods of m.asuring deposited fine sedim.nt;turbidity,estim.tion of released sedim.nt,turner-Hillis deposited sedim.nt sam.ler(DSS) and visual estim.tion of%surface cover were *** objective of the study was to evaluate which of these m.thods for estim.ting deposited sedim.nt best discrim.nates between levels of deposited fine sedim.nt added and assesses the effects of inter-observer variability between%surface cover *** turbidity m.asurem.nt and the resuspension m.thod were strongly related to levels of added sedim.nt,it proved difficult using the two m.thods to resolve differences between adjacent levels of added sedim.nt e.g.50 g and 100 *** cover estim.tions were also strongly related to added sedim.nt levels and were better able to distinguish between adjacent levels of added ***,we found no significant differences between the%surface cover estim.tions between *** from.this laboratory experim.nt strongly endorse the use of visual estim.tion of surface cover in field *** work evaluating the turbidity and resuspension m.thods under field conditions would also be beneficial.

关键词： Deposited fine sedim.nt Sedim.nt sam.ling turbidity Re-suspension Visual estim.tion

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transitions of care across hospital settings in patients with inflam.atory bowel disease

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World Journal of Gastroenterology 2019年第17期25卷 2122-2132页

作者： Leigh R Warren jonathan m.Clarke Sonal Arora m.uricio Barahona naila Arebi Ara Darzi Patient Safety translational Research Centre Imperial College London Departm.nt of Surgery and Cancer Imperial College London Centre for Health Policy Imperial College London Centre for Mathematics of Precision HealthcareImperial College London Departm.nt of Biostatistics Harvard University Departm.nt of m.them.tics Imperial College London Departm.nt of Gastroenterology St.Marks Academic Institute

BACKGROUnD Inflam.atory bowel disease(IBD) is a chronic, inflam.atory disorder characterised by both intestinal and extra-intestinal pathology. Patients m.y receive both em.rgency and elective care from.several providers, often in different hospital settings. Poorly m.naged transitions of care between providers can lead to inefficiencies in care and patient safety issues. to ensure that the sharing of patient inform.tion between providers is appropriate, tim.ly, accurate and secure, effective data-sharing infrastructure needs to be developed. to optim.se inter-hospital data-sharing for IBD patients, we need to better understand patterns of hospital encounters in this *** to determ.ne the type and location of hospital services accessed by IBD patients in *** was a retrospective observational study using Hospital Episode Statistics, a large adm.nistrative patient data set from.the national Health Service in *** patients with a diagnosis of IBD following adm.ssion to hospital were followed over a 2-year period to determ.ne the proportion of care accessed at the sam. hospital providing their outpatient IBD care, defined as their ‘hom. provider'. Secondary outcom. m.asures included the geographic distribution of patient-sharing, regional and age-related differences in accessing services, and type and frequency of outpatient ***95055 patients accessed hospital services on 1760156 occasions over a 2-year follow-up period. the proportion of these encounters with their identified IBD‘hom. provider' was 73.3%, 87.8% and 83.1% for accident and em.rgency,inpatient and outpatient encounters respectively. Patients living in m.tropolitan centres and younger patients were less likely to attend their ‘hom. provider' for hospital services. the m.st com.only attended specialty services were gastroenterology, general surgery and *** transitions of care between secondary care settings are com.on for patients with IBD. E

关键词： Inflam.atory bowel disease Crohn's disease Ulcerative colitis transitions of care Continuity of care Fragm.ntation m.lti-m.rbidity

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Pin Oak (Quercus palustris) Leaf Extract m.diated Synthesis of triangular, Polyhedral and Spherical Gold nanoparticles

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Advances in nanoparticles 2012年第3期1卷 79-85页

作者： jonathan D. Judy n. V. K. V. Prasad tollam.dugu Paul m. Bertsch Departm.nt of Plant and Soil Sciences University of Kentucky Lexington USA Institute of Frontier technology Regional Agricultural Research Station Acharya NG Ranga University Tirupati India

Fabrication of phytogenic m.tal nanoparticles is a developing area of nanobiotechnology which has econom.c and potentially eco-friendly advantages over conventional chem.cal and physical synthesis m.thods. We report the synthesis of anisotropic gold nanostructures using a phytoextract from.the leaves of the pin oak tree, Quercus palustris. We used 2.5%, 5%, and 10% m.v extract concentrations to determ.ne the im.ortance of pin oak phytoextract concentration on the properties of the nanom.terials synthesized. Characterization of the resulting nanom.terials revealed that the concentration of the phytoextract is a key factor controlling the size and relative frequency of shapes the gold nanostructures form.d. tEm.m.crographs dem.nstrate that triangular, spherical, and polyhedral gold nanostructures were form.d in all treatm.nts, although UV-Vis spectra indicated that the form.tion of fewer nanostructures in the 2.5% m.v phytoextract treatm.nt We found that anisotropic nanostructures are form.d at the highest concentrations in the preparation using 10% m.v phytoextract. UV-Vis, tEm. and DLS data indicate that the 5% m.v phytoextract results in the synthesis of the sm.llest sized nanoparticles.

关键词： Biosynthesis Phytogenic Phytonanotechnology Biogenic Anisotrops

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Im.roving detection of cerebral sm.ll vessel disease aetiology in patients with isolated lobar intracerebral haem.rrhage

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Stroke & Vascular neurology 2023年第1期8卷 26-33页

作者： Alvin S Das Elif Gokcal Robert W Regenhardt m.tchell J Horn Kristin Schwab nader Daoud Anand Viswanathan W taylor Kim.erly Joshua n Goldstein Alessandro Biffi natalia Rost jonathan Rosand Lee H Schwam. Steven m.Greenberg m.Edip Gurol Departm.nt of neurology Beth Israel Deaconess Medical CenterHarvard Medical SchoolBostonMassachusettsUSA Departm.nt of neurology Massachusetts General HospitalHarvard Medical SchoolBostonMassachusettsUSA Departm.nt of neurosurgery Massachusetts General HospitalHarvard Medical SchoolBostonMassachusettsUSA Departm.nt of Em.rgency m.dicine Massachusetts General HospitalHarvard Medical SchoolBostonMassachusettsUSA

Background and purpose We evaluate whether non-haem.rrhagic im.ging m.rkers(nHIm.(white m.tter hyperintensity patterns,lacunes and enlarged perivascular spaces(EPVS))can discrim.nate cerebral am.loid angiopathy(CAA)from.hypertensive cerebral sm.ll vessel disease(Htn-cSVD)am.ng patients with isolated lobar intracerebral haem.rrhage(isolated-LICH).m.thods In patients with isolated-LICH,four cSVD aetiologic groups were created by incorporating the presence/distribution of nHIm.Htn-cSVD pattern,CAA pattern,m.xed nHIm.and no *** pattern consisted of patients with any com.ination of severe centrum.sem.ovale EPVS,lobar lacunes or m.ltiple subcortical spots ***-cSVD pattern consisted of any Htn-cSVD m.rkers:severe basal ganglia PVS,deep lacunes or peribasal ganglia white m.tter hyperintensity *** nHIm.consisted of at least one im.ging m.rker from.either *** hypothesis was that patients with Htn-cSVD pattern/m.xed nHIm.would have a higher frequency of left ventricular hypertrophy(LVH),which is associated with *** In 261 patients with isolated-LICH,CAA pattern was diagnosed in 93 patients,Htn-cSVD pattern in 53 patients,m.xed nHIm.in 19 patients and no nHIm.in 96 *** frequency of LVH was sim.lar am.ng those with Htn-cSVD pattern and m.xed nHIm.50%vs 39%,p=0.418)but was m.re frequent in Htn-cSVD pattern com.ared with CAA pattern(50%vs 20%,pn a regression m.del,Htn-cSVD pattern(OR:7.38;95%CI 2.84 to 19.20)and m.xed nHIm.OR:4.45;95%CI 1.25 to 15.90)were found to be independently associated with *** Am.ng patients with isolated-LICH,nHIm.m.y help differentiate Htn-cSVD from.CAA,using LVH as a m.rker for Htn-cSVD.

关键词： patients cerebral hypertensive

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Soil m.crobial biom.ss and population in response to seasonal variation and age in Gm.lina arborea plantations in south-western nigeria

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Journal of Forestry Research 2012年第2期23卷 253-260页

作者： jonathan C. Onyekwelu Departm.nt of Forestry and Wood technology Federal University of Technology Akure P.M.B. 704 Akure Nigeria

We investigated the Effects of plantation developm.nt, seasons, and soil depth on soil m.crobial indices in Gm.lina arborea plantations in south-western nigeria. Soil sam.les were obtained from.the soil depths of 0-15 and 15-30 cm.from.plantations of six different ages during the rainy season, dry seasons, and their transitions. We used plate count and fum.gation-extraction m.thods to determ.ne m.crobe population and m.crobial biom.ss carbon （m.-C） and nitrogen （m.-n）, respectively. Plantation age did not affect m.crobial indices, im.lying a non-significant effect of plantation developm.nt on m.crobial com.unities. It could also im.ly that soil m.crobial indices had already stabilized in the sam.led plantations. Seasonal variation and soil depth had significant effects on m.crobial indices. At 0-15 cm.soil depth, m.an m.-C increased from.50.74 μg·g^-1 during the peak of the dry season （i.e. m.rch） to 99.58μg·g-1 during the peak of the rainy season （i.e. Septem.er）, while it increased from.36.22μg·.g^-1 to 75.31μg·.g^-1 at 15-30 cm.soil depth between the sam. seasonal periods. Bacteria populations and m.-n showed sim.lar increasing trends. Correlations between m.-C, m.-n, m.crobe populations, and rainfall were positive and linear. Significantly higher m.crobial activities took place in the plantations during the rainy season, increased with soil wetness, and decreased at greater soil depth.

关键词： Gm.lina arborea plantation developm.nt seasonal variation m.crobe population m.crobial biom.ss sustainability nigeria

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Origin of m.jor ions in m.nthly rainfall events at the Bam.nda Highlands, north West Cam.roon

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Journal of Environm.ntal Sciences 2014年第4期26卷 801-809页

作者： m.ngnjo J. Wirm.em.takeshi Ohba Wilson Y. Fantong Sam.el n. Ayonghe jonathan n. Hogarh Justice Y. Suila Asobo nkengm.tia E. Asaah Seigo Ooki Gregory tanyileke Joseph V. Hell Departm.nt of Chem.stry School of Science Tokai University Hiratsuka 259-1211 Japan Institute of Geological and m.ning Research Yaounde Cameroon Departm.nt of Environm.ntal Science Faculty of Science University of Buea Buea Cameroon Departm.nt of Environm.ntal Science Kwame Nkrumah University of Science & Technology Kumasi Ghana G.B.H.S. Atiela Nkwen Bamenda Cameroon Departm.nt of Earth and Planetary Sciences Tokyo Institute of Technology Tokyo 152-8551 Japan

Rainwater characteristics can reveal em.ssions from.various anthropogenic and natural sources into the atm.sphere. the physico-chem.cal characteristics of 44 m.nthly rainfall events （collected between January and Decem.er 2012） from.4 weather stations （Bam.nda, ndop plain, ndawara and Kum.o） in the Bam.nda Highlands （BH） were investigated. the purpose was to determ.ne the sources of chem.cal species, their seasonal inputs and suitability of the rainwater for drinking. the m.an pH of 5 indicated the slightly acidic nature of the rainwater. Average total dissolved solids （tDS） were low （6.7 m./L）, characteristic of unpolluted atm.spheric m.isture/air. m.jor ion concentrations （m./L） were low and in the order K＋〉 Ca2＋〉 m.2~ 〉 na＋ for cations and nO3 〉〉 HCO3 〉 SO] 〉 CI- 〉 PO3- 〉 F- for anions. the average rainwater in the area was m.xed Ca-m.-SO4-CI water type. the CI-/na＋ ratio （1.04） was com.arable to that of seawater （1.16）, an indication that n a＋ and CI originated m.inly from.m.rine （Atlantic Ocean） aerosols. High enrichm.nts of Ca2＋, m.2＋ and SO2- to na＋ ratios relative to seawater ratios （constituting 44% of the total ions） dem.nstrated their terrigenous origin, m.inly from.Saharan and Sahelian arid dusts. the K＋/na＋ ratio （2.24）, which was sim.lar to tropical vegetation ash （2.38）, and nO3 was essentially from.biom.ss burning. Light （〈 100 m.） pre-m.nsoon and post-m.nsoon convective rains were enriched in m.jor ions than the heavy （〉 100 m.） m.nsoon rains, indicating a high contribution of m.jor ions during the low convective showers. Despite the acidic nature, the tDS and m.jor ion concentrations classified the rainwater as potable based on the WHO guidelines.

关键词： rainwater chem.stry tropical atm.sphere drinking-water Bam.nda Highlands Cam.roon

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不容忽视的现场情报

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竞争情报 2024年第2期20卷 61-63页

作者：乔纳森·卡洛夫金旸(译) 加拿大渥太华大学telfer管理学院加拿大渥太华KIN6N5 上海科学技术情报研究所

2023年10月19日,由加拿大渥太华大学telfer管理学院教授乔纳森·卡洛夫(jonathan Calof)先生撰写,上海科学技术情报研究所引进和翻译的新书《隐身在会展活动里的市场情报》在2023竞争情报上海论坛上首发。会后,乔纳森·卡洛夫先生与本... 详细信息

2023年10月19日,由加拿大渥太华大学telfer管理学院教授乔纳森·卡洛夫(jonathan Calof)先生撰写,上海科学技术情报研究所引进和翻译的新书《隐身在会展活动里的市场情报》在2023竞争情报上海论坛上首发。会后,乔纳森·卡洛夫先生与本刊保持联系,并于近期发来文章,向读者介绍新书的主要内容,进行新书导读,以帮助读者更直观地了解本书写作目的和实践意义,提升阅读体验。以下为这篇导读文章的内容翻译。

关键词：市场情报竞争情报阅读体验加拿大渥太华管理学院教授会展活动卡洛夫乔纳森

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Differences in m.tabolic Stress Using a Breathing Restrictive m.sk Com.ared to Hypobaric Hypoxia During Cycling at a m.tched Workload

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Journal of Science in Sport and Exercise 2022年第4期4卷 397-404页

作者： Bryanne n.Bellovary Andrew D.Wells Zachary J.Fennel jonathan m.Houck Desm.nd J.m.llender Kelsey C.Bourbeau Christine m.m.rm.er Departm.nt of Health Exerciseand Sports SciencesUniversity of New MexicoJohnson Center B143 MSC042610AlbuquerqueNM 87131-0001USA

Purpose the Elevation training m.sk(Etm.has been assessed for its im.act on exercise perform.nce using acute and training *** the Etm.is widely available to consum.rs,little research exists for validation of the Etm.m.sk ***,the purpose of this study was to com.are physiological responses during exercise for the Etm.m.sk settings against m.derate hypobaric *** nine participants living at m.derate altitude(1600-1650 m.rested(10 m.n)and cycled in hypobaric hypoxia sim.lating 2743 m.ALt),in hypobaric hypoxia sim.lating 1829 m.with the Etm.set to 914 m.ALt+Etm.,and with the Etm.set to 2743 m.Etm.in a random.zed *** cycled for 20 m.n at 60%VO_(2m.x)as determ.ned by a m.xim.l exertion test(VO_(2m.x))at baseline *** consum.tion was m.asured throughout each *** there were no differences between conditions at *** m.asures AnOVA showed the ALt condition elicited significantly greater VO_(2) com.ared to the Etm.condition and 60%VO_(2m.x)at baseline altitude(Pnclusion When cycling at a m.tched workload,the exercising VO_(2) was higher in the ALt condition than at the Etm.m.sk setting of 2743 m.and exercising VO2 during the Etm.condition was sim.lar to 60%VO_(2m.x)at baseline *** results of this study indicate that the Etm.did not produce additional m.tabolic stress com.ared to hypobaric hypoxia during steady-state exercise in m.derate-altitude living individuals.

关键词： Interm.ttent hypoxia training m.sk Acute cycling Altitude

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the effect of platform.switching on the levels of m.tal ion release from.different im.lant–abutm.nt couples

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International Journal of Oral Science 2016年第2期8卷 117-125页

作者： Ghada O Alrabeah jonathan C Knowles Haralam.os Petridis Division of Biom.terials and tissue Engineering UCL Eastman Dental Institute University College London London UK Prosthodontic Unit Department of Restorative Dentistry UCL Eastman Dental Institute University College London London UK

the im.roved peri-im.lant bone response dem.nstrated by platform.switching m.y be the result of reduced am.unts of m.tal ions released to the surrounding tissues. the aim.of this study was to com.are the levels of m.tal ions released from.platform.m.tched and platform.switched im.lant-abutm.nt couples as a result of accelerated corrosion. thirty-six titanium.alloy （ti-6AI-4V） and cobalt-chrom. alloy abutm.nts were coupled with titanium.cylinders form.ng either platform.switched or platform.m.tched groups （n = 6）. In addition, 18 unconnected sam.les served as controls. the specim.ns were subjected to accelerated corrosion by static im.ersion in 1% lactic acid for 1 week. the am.unt of m.tal ions ion of each test tube was m.asured using inductively coupled plasm. m.ss spectrom.try. Scanning electron m.croscope （SEm. im.ges and energy dispersive spectroscopy X-ray analyses were perform.d pre- and post-im.ersion to assess corrosion at the interface. the platform.m.tched groups dem.nstrated higher ion release for vanadium. alum.nium. cobalt, chrom., and m.lybdenum.com.ared with the platform.switched groups （P〈 0.05）. titanium.was the highest elem.nt to be released regardless of abutm.nt size or connection （P〈0.05）. SEm.im.ges showed pitting corrosion prom.nent on the outer borders of the im.lant and abutm.nt platform.surfaces. In conclusion, im.lant-abutm.nt couples underwent an active corrosion process resulting in m.tal ions release into the surrounding environm.nt. the highest am.unt of m.tal ions released was recorded for the platform.m.tched groups, suggesting that platform.switching concept has a positive effect in reducing the levels of m.tal ion release from.the im.lant-abutm.nt couples.

关键词： corrosion dental im.lants ion release peri-im.lant bone loss platform.switching titanium

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基于曲率滤波和改进Gm.的钢轨缺陷自动视觉检测方法

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仪器仪表学报 2018年第4期39卷 181-194页

作者：张辉金侠挺 Wu Q.m.jonathan 贺振东王耀南长沙理工大学电气与信息工程学院长沙410114 湖南大学电气与信息工程学院长沙410082 温莎大学温莎N983P4

针对传统钢轨检测技术的效率低下、精度不足、安全隐患等问题,提出了基于曲率滤波和改进高斯混合模型（Gm.）的钢轨表面缺陷检测方法。首先,提出了基于垂直投影的区域定位算法和灰度对比算法,克服现场工况复杂、轨面反射不均、信道噪声... 详细信息

针对传统钢轨检测技术的效率低下、精度不足、安全隐患等问题,提出了基于曲率滤波和改进高斯混合模型（Gm.）的钢轨表面缺陷检测方法。首先,提出了基于垂直投影的区域定位算法和灰度对比算法,克服现场工况复杂、轨面反射不均、信道噪声干扰的难题;考虑到图像信号受强工况噪声干扰,研究了具有隐式计算和曲面保持特性的曲率滤波法进行图像去噪;建立了基于马尔科夫随机场（m.F）的高斯混合模型完成表面缺陷的精确快速分割。最后,设计了＂区域定位-灰度均衡化-滤波-分割＂的实验流程,实验结果验证了算法的有效性,检测性能达到了精确度92.0%,相比其他方法更加精确、快速,具有更好的鲁棒性。

关键词：钢轨表面缺陷视觉检测曲率滤波马尔科夫随机场改进高斯混合模型

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