检索结果-南通市图书馆

A mathematical model to assess the impact of testing and isolation compliance on the transmission of COVID-19

Infectious Disease Modelling 2023年第2期8卷 427-444页

作者： Shasha Gao Pant Binod Chidozie Williams Chukwu Theophilus Kwofie salman safdar Lora Newman Seoyun Choe Bimal Kumar Datta Wisdom Kwame Attipoe Wenjing Zhang P.van den Driessche School of Mathematics and Statistics Jiangxi Normal UniversityNanchang330000JiangxiChina Department of Mathematics University of FloridaGainesville32611FLUSA Department of Mathematics University of MarylandCollege Park20742MDUSA Department of Mathematics Wake Forest UniversityWinston-Salem27109NCUSA School of Mathematical and Statistical Sciences Arizona State UniversityTempe85287AZUSA Department of Mathematical Sciences University of CincinnatiCincinnati45221OHUSA Department of Mathematics University of Central FloridaOrlando32816FLUSA Department of Mathematical Sciences Florida Atlantic UniversityBoca Raton33431FLUSA Department of Mathematics Clarkson UniversityPotsdam13699NYUSA Department of Mathematics and Statistics Texas Tech UniversityLubbock79409TXUSA Department of Mathematics and Statistics University of VictoriaVictoriaV8W 2Y2B.CCanada

The COVID-19 pandemic has ravaged global health and national economies worldwide.Testing and isolation are effective control strategies to mitigate the transmission of COVID-19,especially in the early stage of the disease outbreak.In this paper,we develop a deterministic model to investigate the impact of testing and compliance with isolation on the transmission of COVID-19.We derive the control reproduction number R_(C),which gives the threshold for disease elimination or prevalence.Using data from New York State in the early stage of the disease outbreak,we estimate R_(C)=7:989.Both elasticity and sensitivity analyses show that testing and compliance with isolation are significant in reducing R_(C) and disease prevalence.Simulation reveals that only high testing volume combined with a large proportion of individuals complying with isolation have great impact on mitigating the transmission.The testing starting date is also crucial:the earlier testing is implemented,the more impact it has on reducing the infection.The results obtained here would also be helpful in developing guidelines of early control strategies for pandemics similar to COVID-19.

关键词： COVID-19 Testing Compliance Isolation New York state

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Dynamics of COVID-19 pandemic in India and Pakistan: A metapopulation modelling approach

引用

Infectious Disease Modelling 2021年第1期6卷 1173-1201页

作者： Samantha J.Brozak Binod Pant salman safdar Abba B.Gumel School of Mathematical and Statistical Sciences Arizona State UniversityTempeAZ85287USA Department of Mathematics and Applied Mathematics University of PretoriaPretoria0002South Africa

India has been the latest global epicenter for COVID-19,a novel coronavirus disease that emerged in China in late 2019.We present a base mathematical model for the transmission dynamics of COVID-19 in India and its neighbor,Pakistan.The base model was rigorously analyzed and parameterized using cumulative COVID-19 mortality data from each of the two countries.The model was used to assess the population-level impact of the control and mitigation strategies implemented in the two countries(notably non-pharmaceutical interventions).Numerical simulations of the basic model indicate that,based on the current baseline levels of the control and mitigation strategies implemented,the pandemic trajectory in India is on a downward trend.This downward trend will be reversed,and India will be recording mild outbreaks,if the control and mitigation strategies are relaxed from their current levels.By early September 2021,our simulations suggest that India could record up to 460,000 cumulative deaths under baseline levels of the implemented control strategies,while Pakistan(where the pandemic is comparatively milder)could see over 24,000 cumulative deaths at current mitigation levels.The basic model was extended to assess the impact of back-and-forth mobility between the two countries.Simulations of the resulting metapopulation model show that the burden of the COVID-19 pandemic in Pakistan increases with increasing values of the average time residents of India spend in Pakistan,with daily mortality in Pakistan peaking in mid-August to mid-September of 2021.Under the respective baseline control scenarios,our simulations show that the backand-forth mobility between India and Pakistan could delay the time-to-elimination of the COVID-19 pandemic in India and Pakistan to November 2022 and July 2022,respectively.

关键词： COVID-19 SARS-CoV-2 Non-pharmaceutical interventions(NPIs) Metapopulation model Residence-time Reproduction number

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cyber Secure Framework for Smart Containers Based on Novel Hybrid DTLS Protocol

引用

Computer Systems Science & Engineering 2022年第12期43卷 1297-1313页

作者： Waseem Ullah Khan safdar Nawaz Khan Marwat salman Ahmed Department of Computer Systems Engineering University of Engineering and Technology PeshawarPeshawar25120Pakistan

The Internet of Things (IoTs) is apace growing, billions of IoT devicesare connected to the Internet which communicate and exchange data among eachother. Applications of IoT can be found in many fields of engineering and sciencessuch as healthcare, traffic, agriculture, oil and gas industries, and logistics. Inlogistics, the products which are to be transported may be sensitive and perishable, and require controlled environment. Most of the commercially availablelogistic containers are not integrated with IoT devices to provide controlled environment parameters inside the container and to transmit data to a remote server.This necessitates the need for designing and fabricating IoT based smart containers. Due to constrained nature of IoT devices, these are prone to different cybersecurity attacks such as Denial of Service (DoS), Man in Middle (MITM) andReplay. Therefore, designing efficient cyber security framework are required forsmart container. The Datagram Transport Layer Security (DTLS) Protocol hasemerged as the de facto standard for securing communication in IoT devices.However, it is unable to minimize cyber security attacks such as Denial of Serviceand Distributed Denial of Service (DDoS) during the handshake process. Themain contribution of this paper is to design a cyber secure framework by implementing novel hybrid DTLS protocol in smart container which can efficientlyminimize the effects of cyber attacks during handshake process. The performanceof our proposed framework is evaluated in terms of energy efficiency, handshaketime, throughput and packet delivery ratio. Moreover, the proposed framework istested in IoT based smart containers. The proposed framework decreases handshake time more than 9% and saves 11% of energy efficiency for transmissionin compare of the standard DTLS, while increases packet delivery ratio andthroughput by 83% and 87% respectively.

关键词： Logistic container logistics security cyber security perishable products monitoring

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：