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Controlled Stochastic Partial Differential Equations for Rabbits on a Grassland

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Acta Mathematicae Applicatae Sinica 2020年第2期36卷 262-282页

作者： suzanne lenhart Xiao TANG Jie XIONG Jiong-min YONG Department of Mathematics University of TennesseeKnoxvilleTN 37996-1320USA Department of Mathematics.Southern University of Science and Technology Shenzhen518055China Department of Mathematics University of Central FloridaOrlandoFL 32816USA

A new approach to modeling populations incorporating stochasticity,a random environment,and individual behavior is illustrated with a specific example of two interacting populations:rabbits and *** derivation of the system of stochastic partial differential equations(SPDEs)to show how the individual mechanisms of both populations are *** model also has an unusual feature of a nonlocal *** harvesting of the rabbit population is introduced as a control variable.

关键词： Stochastic partial differential equation tightness optimal control population model

A vaccination model for COVID-19 in Gauteng,South Africa

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Infectious Disease Modelling 2022年第3期7卷 333-345页

作者： Christina J.Edholm Benjamin Levy Lee Spence Folashade B.Agusto Faraimunashe Chirove C.Williams Chukwu David Goldsman Moatlhodi Kgosimore Innocent Maposa K.A.Jane White suzanne lenhart Department of Mathematics Scripps CollegeClaremontCAUSA Mathematics Department Fitchburg State UniversityFitchburgMAUSA Department of Mathematics University of TennesseeKnoxvilleTNUSA Department of Ecology and Evolutionary Biology University of KansasLawrenceKSUSA Department of Mathematics and Applied Mathematics University of JohannesburgSouth Africa H.Milton Stewart School of Industrial and Systems Engineering Georgia Institute of TechnologyAtlantaGAUSA Biometry and Mathematics Department Botswana University of Agriculture and Natural ResourcesGaboroneBotswana Division of Epidemiology and Biostatistics School of Public HealthFaculty of Health SciencesUniversity of the WitwatersrandJohannesburgSouth Africa Department of Mathematical Sciences University of BathBathUK

The COVID-19 pandemic provides an opportunity to explore the impact of government mandates on movement restrictions and non-pharmaceutical interventions on a novel infection,and we investigate these strategies in early-stage outbreak *** rate of disease spread in South Africa varied over time as individuals changed behavior in response to the ongoing pandemic and to changing government *** a system of ordinary differential equations,we model the outbreak in the province of Gauteng,assuming that several parameters vary over *** data from the time period before vaccination gives the approximate dates of parameter changes,and those dates are linked to government *** parameters are then estimated from available case data and used to assess the impact of each *** forward in time,possible scenarios give projections involving the implementation of two different vaccines at varying *** results quantify the impact of different government policies and demonstrate how vaccinations can alter infection spread.

关键词： COVID-19 Gauteng South Africa ODE epidemiology Model Vaccination Parameter estimation

Modeling the role of public health education in Ebola virus disease outbreaks in Sudan

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Infectious Disease Modelling 2017年第3期2卷 323-340页

作者： Benjamin Levy Christina Edholm Orou Gaoue Roselyn Kaondera-Shava Moatlhodi Kgosimore suzanne lenhart Benjamin Lephodisa Edward Lungu Theresia Marijani Farai Nyabadza Department of Mathematics Fitchburg State UniversityUSA Department of Mathematics University of TennesseeUSA Department of Botany University of HawaiiUSA Department of Mathematics University of BotswanaBotswana Department of Mathematics Botswana International University of Science and TechnologyBotswana Department of Mathematics University of Dar es SalaamTanzania Department of Basic Sciences Botswana University of Agriculture and Natural ResourcesBotswana Department of Mathematics University of StellenboschSouth Africa

Public involvement in Ebola Virus Disease(EVD)prevention efforts is key to reducing disease *** education through practical health information to particular groups and sub-populations is crucial to controlling the *** this paper,we study the dynamics of Ebola virus disease in the presence of public health education with the aim of assessing the role of behavior change induced by health education to the dynamics of an *** power of behavior change is evident in two outbreaks of EVD that took place in Sudan only 3 years *** first occurrence was the first documented outbreak of EVD and produced a significant number of *** second outbreak produced far fewer cases,presumably because the population in the region learned from the first *** derive a system of ordinary differential equations to model these two contrasting *** the population in Sudan learned from the first outbreak of EVD and changed their behavior prior to the second outbreak,we use data from these two instances of EVD to estimate parameters relevant to two contrasting *** then simulate a future outbreak of EVD in Sudan using our model that contains two susceptible populations,one being more informed about *** finding show how a more educated population results in fewer cases of EVD and highlights the importance of ongoing public health education.

关键词： Ebola virus disease Public health education Outbreaks Mathematical model Simulations Infectious disease model

Insight into the effects of electrochemical factors on host-guest interaction induced signature events in a biological nanopore

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纳米技术与精密工程（英文） 2020年第1期3卷 2-8页

作者： XiaojunWei Zehui Zhang XiaoqinWang Brian lenhart Roberto Gambarini Jonathan Gray Chang Liu Biomedical Engineering Program University of South CarolinaColumbiaSC 29208USA Department of Chemical Engineering University of South CarolinaColumbiaSC 29208USA

The signature events caused by host-guest interactions in the nanopore system can be used as a novel and characteristic signal in quantitative detection and analysis of various ***,the effect of several electrochemical factors on the host-guest interactions in nanopore still remains ***,we systematically studied host-guest interactions,especially oscillation of DNA-azide adamantane@cucurbit[6]inα-Hemolysin nanopore under varying pH,concentration of electrolytes and counterions(Li+,Na+,K+).Our results indicate correlations between the change of pH and the duration of the oscillation *** addition,the asymmetric electrolyte concentration and the charge of the counterions affects the frequency of signature events in oscillation signals,and even the integrity of the protein *** study provides insight into the design of a future biosensing platform based on signature oscillation signals of the host-guest interaction within a nanopore.

关键词： Nanopore Host-guest interaction Biosensors Electrochemistry

Drug-induced liver injury and COVID-19:A review for clinical practice

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World Journal of Hepatology 2021年第9期13卷 1143-1153页

作者： Gabriela Xavier Ortiz Gabriele lenhart Matheus William Becker Karin Hepp Schwambach Cristiane Valle Tovo Carine Raquel Blatt Graduate Program in Medicine Hepatology Federal University of Health Sciences of Porto AlegrePorto Alegre 90050-170Rio Grande do SulBrazil Multiprofessional Residency Integrated in Health Federal University of Health Sciences of Porto AlegrePorto Alegre 90050-170Rio Grande do SulBrazil Internal Medicine Department Graduate Program in Medicine-HepatologyFederal University of Health Sciences of Porto AlegrePorto Alegre 90050-170Rio Grande do SulBrazil Pharmacoscience Department Graduate Program in Medicine-HepatologyFederal University of Health Sciences of Porto AlegrePorto Alegre 90050-170Rio Grande do SulBrazil

Coronavirus disease 2019(COVID-19)consists of a systemic disease that can present many *** infection presents broad clinical symptoms and a high rate of *** addition to severe acute respiratory syndrome,the patients manifest complications beyond the respiratory *** frequency of liver damage in COVID-19 patients ranges from 14.8% to 53% of *** should pay attention to drug-induced liver injury(DILI)in patients with COVID-19,especially considering the off-label use of drugs in prophylactic and therapeutic regimens applied on large *** review aims to present relevant information on the medication used so far in COVID-19 patients and its possible *** reviewed liver damage in patients with COVID-19 on PubMed and Virtual Health Library to investigate DILI *** studies were selected,involving the medicines remdesivir,tocilizumab and a pharmacovigilance analysis *** hepatotoxicity profile of drugs presented in the literature considers use in accordance to usual posology standards for ***,drugs currently used in the management of COVID-19 follow different dosages and posology than those tested by the pharmaceutical *** deficiency of uniformity and standardization in the assessment of hepatotoxicity cases hinders the publication of information and the possibility of comparing information among healthcare *** is suggested that severe liver injury in COVID-19 patients should be reported in pharmacovigilance institutions,and physicians should pay attention to any considerable abnormal liver test elevation as it can demonstrate unknown drug *** disorders in COVID-19 patients and the use of several concomitant off-label medications—with a potential risk of further damaging the liver-should at least be a warning sign for rapid identification and early intervention,thus preventing liver damage from contributing to severe impairment in patients.

关键词： Liver injury Chemical and drug-induced liver injury COVID-19 SARSCoV-2 Pharmacovigilance

Selective laser sintering of copper for micro-electronic devices

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Selective laser sintering of copper for micro-electronic dev...

2003年全国电子电镀学术研讨会

作者： M.Seufort W.Jillek A.lenhart FH-Nuernberg

The TherMark process is a popular laser sintering technique for colour labelling on hard substrates such as glass,ceramics and metals forming beautiful marks or letters under laser scanning controlled by PC[1].*** and...

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大放异彩的奖励旅游谈会奖旅游业的发展

中国会展 2019年第24期 70-75页

作者： Maria lenhart 裴超

奖励旅游业重现生机,然而在旺盛的市场需求中也伴随着一系列的挑战。如何把握奖励旅游的市场脉搏,更清晰的看到奖励旅游的发展方向?奖励旅游在引来阵阵“喝彩”的同时,如何处理好自身遇到的一些挑战,从而能够大放异彩,更上一层楼?目前,... 详细信息

奖励旅游业重现生机,然而在旺盛的市场需求中也伴随着一系列的挑战。如何把握奖励旅游的市场脉搏,更清晰的看到奖励旅游的发展方向?奖励旅游在引来阵阵“喝彩”的同时,如何处理好自身遇到的一些挑战,从而能够大放异彩,更上一层楼?目前,随着更多的组织机构选择国际会议目的地和规划更多的项目,奖励商务的市场需求十分旺盛。然而即便这个行业已经开始从低谷走出,奖励旅游策划者说他们仍然受到升高的旅游费用和更多的限制因素的挑战。

关键词：奖励旅游市场脉搏旅游费用限制因素旅游业市场需求会议目的地策划者

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就用土著——海外会议供应商选择之道

中国会展 2014年第24期 46-51页

作者： Maria lenhart 张丹 MPI

在海外举办会议须多方考虑，选择本地供应商往往事半功倍。由于地域差异以及民俗风情的不同，在选择一些代理或服务机构时最好选择当地的供应商，这些“土著”对本地办会的资源信息更为掌握，也更了解会议组织的难点。此外，在与酒店或... 详细信息

在海外举办会议须多方考虑，选择本地供应商往往事半功倍。由于地域差异以及民俗风情的不同，在选择一些代理或服务机构时最好选择当地的供应商，这些“土著”对本地办会的资源信息更为掌握，也更了解会议组织的难点。此外，在与酒店或场馆签订合同时也需特别注意法律相关事宜。提前给参会者提供一些会议目的地攻略也很重要。

关键词：供应商选择海外土著事半功倍民俗风情地域差异服务机构资源信息

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紧跟潮流——让社交媒体引爆你的会议

中国会展 2014年第16期 50-55页

作者：张丹 MPI Maria lenhart

现在是一个社交媒体主导的社会环境,一个事件成为社交媒体的焦点要远比大多数精心打造的营销战略成功得多。它可以迅速得到大量关注,提升品牌影响力,扩大会议影响以及为未来事件构建兴奋点。这种方法也比参会者需要亲自运营的传统营销... 详细信息

现在是一个社交媒体主导的社会环境,一个事件成为社交媒体的焦点要远比大多数精心打造的营销战略成功得多。它可以迅速得到大量关注,提升品牌影响力,扩大会议影响以及为未来事件构建兴奋点。这种方法也比参会者需要亲自运营的传统营销模式省钱得多。社交媒体营销的意义与传统的营销方式不同,粉丝关注几乎不可以被人工操作或控制,但可以被引导。组织者可以创造一个环境来让参会者和主持人通过网络通道更大胆地交流自己的经历经验。Shawna Suckow,SPIN和The Hive Network的发言人和创始人,

关键词：社交媒体传统营销模式营销战略社会环境未来事件品牌影响力 marketing speakers audience participation