A Mathematical Model of Brucellosis Infection in Bison Population with Environmental Factors, Temporary Immunity and Control Strategies

2021 ◽  
Vol 7 (6) ◽  
Author(s):  
Pattarapan Kumpai ◽  
Chairat Modnak
Keyword(s):  
Mathematical Model ◽  
Environmental Factors ◽  
Control Strategies ◽  
And Control ◽  
Temporary Immunity

scholarly journals Research of Jiles-Atherton Dynamic Model in Giant Magnetostrictive Actuator

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Yongguang Liu ◽  
Xiaohui Gao ◽  
Chunxu Chen
Keyword(s):  
Mathematical Model ◽  
Dynamic Model ◽  
Control Strategies ◽  
Structural Parameters ◽  
Hysteresis Loops ◽  
Structural Dynamic ◽  
Magnetostrictive Actuator ◽  
Output Characteristics ◽  
And Control ◽  
Minor Hysteresis Loops

Due to the existence of multicoupled nonlinear factors in the giant magnetostrictive actuator (GMA), building precise mathematical model is highly important to study GMA’s characteristics and control strategies. Minor hysteresis loops near the bias magnetic field would be often applied because of its relatively good linearity. Load, friction, and disc spring stiffness seriously affect the output characteristics of the GMA in high frequency. Therefore, the current-displacement dynamic minor loops mathematical model coupling of electric-magnetic-machine is established according to Jiles-Atherton (J-A) dynamic model of hysteresis material, GMA structural dynamic equation, Ampere loop circuit law, and nonlinear piezomagnetic equation and demonstrates its correctness and effectiveness in the experiments. Finally, some laws are achieved between key structural parameters and output characteristics of GMA, which provides important theoretical foundation for structural design.

scholarly journals A Mathematical Model of COVID-19 Using Fractional Derivative: Outbreak in India with Dynamics of Transmission and Control

2020 ◽  
Author(s):  
Amjad S. Shaikh ◽  
Iqbal N. Shaikh ◽  
Kottakkaran Sooppy Nisar
Keyword(s):  
Mathematical Model ◽  
Fixed Point Theory ◽  
Control Strategies ◽  
Real Data ◽  
Control Measures ◽  
Approximation Technique ◽  
Transform Method ◽  
First Case ◽  
The Government ◽  
And Control

Since the first case of 2019 novel coronavirus disease (COVID-19) detected on Jan 30, 2020, in India, the number of cases rapidly increased to 3819 cases including 106 deaths as of 5 April 2020. Taking this into account, in the present work, we are studying a Bats-Hosts-Reservoir-People transmission fractional-order COVID-19 model for simulating the potential transmission with the thought of individual social response and control measures by the government. The real data available about infectious cases from $14^{th}$ March to $26^{th}$ March 2020 is analysed and accordingly various parameters of the model are estimated or fitted. The Picard successive approximation technique and Banach's fixed point theory have been used for verification of the existence and stability criteria of the model. Numerical computations are done utilizing the iterative Laplace transform method. In the end, we illustrate the obtained results graphically. The purpose of this study is to estimate the effectiveness of preventive measures, predicting future outbreaks and potential control strategies using the mathematical model.

scholarly journals Some findings of Hybrid Sustainable Energy System for Standalone and Grid Connected Operation: Types, Storage Options, Trends for Research and Control Strategies

2019 ◽  
Vol 8 (10) ◽  
pp. 575-580
Keyword(s):  
Mathematical Model ◽  
Energy Flow ◽  
Control Strategies ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Short Review ◽  
Energy Sources ◽  
Flow Management ◽  
Sustainable Energy System ◽  
And Control

This article presents some critical findings of various issue concerning to HSES like types, storage, trends for research and control strategies of HSES. Various interconnection techniques for HSES are presented. It has been made a short review of Mathematical model for renewable energy sources. Conclusion and result of control strategies work of HSES, Storage techniques of HSES for energy flow management is presented. Finally, it has been made a summary of the future analysis, challenges in techniques and improvements of HSES based power generation techniques for Isolated and grid connected applications

scholarly journals Study on spatial-temporal distribution and environmental ties of Japanese B Encephalitis’s mosquito vector as well as landing rate in The Olympic forest park

2020 ◽  
Author(s):  
Mei-De Liu ◽  
Yong Zhang ◽  
Ying Tong ◽  
Hong-Jiang Zhang ◽  
Qiu-Hong Li ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Control Strategies ◽  
Temporal Distribution ◽  
Effective Control ◽  
Mosquito Vector ◽  
Forest Park ◽  
The Public ◽  
Environmental Features ◽  
The People ◽  
And Control

Abstract Background: Mosquito surveillance is crucial for understanding the epidemic potential, planning early-warning, and effective control strategies. As a key public place in Beijing, the Beijing Olympic Forest Park (BOFP) makes serious epidemiological means for the Beijing, and the survey on the Japanese B Encephalitis (JBE) vector of Culex tritaeniorhynchus and mosquito landing in BOFP is crucial for the people living as well as JBE surveillance and control. It was hypothesized that the Cx. tritaeniorhynchus could be trapped in a well-urbanization area of Beijing, and the distribution of Cx. tritaeniorhynchus and mosquito landing rate are determined by the environmental factors. Methods: Thus, this investigation was performed to understand the spatial-temporal distribution of Cx. Tritaeniorhynchus and landing rate in BOFP, and the relationship between environmental features and densities of Cx. tritaeniorhynchus as well as mosquito landing rate, considering the vector competent of Cx. tritaeniorhynchus and important epidemiological means of BOFP in Beijing. From July to September, the Cx. tritaeniorhynchus was trapped with CDC-lights together with CO2 and the landing rate on the same sites as light traps were also investigated. What’s more, the ties of environmental factors to the density of Cx. tritaeniorhynchus and landing rate was performed with SPSS, after the environmental factors datasets had been extracted with the 3S procedures. Results: As result showed, the highest density of Cx. tritaeniorhynchus could be detected in September in the wetland environment, and the density was related to the grass-water in 400meters buffer (GW_400) and lower-trees in 100meter buffer distance (LT_100). For the landing rate investigation, the highest landing rates was observed in the wetland environment during September. In addition, there were two environmental features could be identified to correlate to landing rates; that is, grass-water in 400meters buffer (GW_400) and high-trees in 100meter buffer distance (HT_100). It was concluded that the Cx. tritaeniorhynchus, the vector of JBE, could be detected in BOFP (well-urbanization area), and the environmental factor could affect not only the spatial distribution of JBE vector but also the mosquito landing rates in BOFP. Conclusions: The information achieved from this study could offer advice to people escaping from mosquito biting and provide useful information to prevent mosquito-borne diseases in Beijing, which means a lot to the public health of Beijing.

scholarly journals Use the Environment to Prevent and Control COVID-19 in Senior-Living Facilities: An Analysis of the Guidelines Used in China

2020 ◽  
pp. 193758672095351
Author(s):  
Zhe Wang
Keyword(s):  
Environmental Factors ◽  
Built Environment ◽  
Infection Control ◽  
Control Strategies ◽  
Environmental Design ◽  
Public Health Emergencies ◽  
Planning And Design ◽  
Age Related ◽  
Key Topics ◽  
And Control

Objective: To identify the environmental factors essential for infection control in senior-living facilities. Background: In the COVID-19 pandemic, older adults are more likely to be infected and develop serious outcomes than young people. Worldwide, senior-living facilities face a battle to protect their residents. Compared with age-related declines, the built environment is more modifiable and can be used for infection control. Methods: This research conducted content analysis of the guidelines on COVID-19 control issued by the State Council of China in February 2020 for senior-living facilities. Six senior-living facility managers in China were interviewed and shared their experiences using these guidelines. Quantitative and qualitative analyses were conducted to identify the essential environmental factors for infection control. Results: Environmental factors suggested in the guidelines were analyzed for three groups of infection-control strategies: keep COVID-19 from entering the facility, prevent COVID-19 spread in the facility, and manage infection and illness. Key topics of experience using the guidelines were identified, including residents’ needs for social interaction and the difficulties of providing dedicated air-conditioning and circulation systems. Based on these analyses, from the perspective of environmental design, environmental factors essential for COVID-19 control in senior-living facilities were summarized at the site, building, and room levels. Conclusion: Proper planning and design of the built environment promote strategies for infection control in senior-living facilities. Findings can be used to guide the new design, renovation, and modification of senior-living facilities for COVID-19 control and future public health emergencies.

scholarly journals Effect of Lockdown Implementation, Environmental & Behavioural factors, Diet and Virus Mutations on COVID-19 Outcomes: A Study on Critical Containment Zones of Indian state of Maharashtra

2020 ◽  
Author(s):  
ONKAR TANAJI MOHITE ◽  
Arvind Subhash Avhad ◽  
Prasad Sutar ◽  
Vaibhav S Pawar
Keyword(s):  
Environmental Factors ◽  
Control Strategies ◽  
Vaccine Design ◽  
Health Facilities ◽  
Infected People ◽  
The People ◽  
Indian State ◽  
Behavioural Factors ◽  
And Control

This work details the study of critical containment zones in Maharashtra within a time (April 9 2020 - July 31 2020) in the context of COVID-19. The effects of lockdown implementation, community isolation, environmental factors, demographic aspects, behavioural factors, diet etc. have been investigated. The effect of the aforementioned factors on the infected cases, cumulative infected cases, recoveries, cumulative recoveries, active cases, deaths and cumulative deaths are analyzed. The integrated effects of the aforementioned factors on COVID- 19 outcomes are further amplified due to adequate and inadequate health facilities. The study will be helpful to scientists, researchers, pharmacists and biotechnologists in new vaccine design & to accommodate above factors for the betterment of susceptible & infected people of Maharashtra and similar demographies across the globe. Further, it pinpoints the need for more awareness and control strategies among the people to reduce the havoc, stress, fear, anxiety, pathogenicity and thereby reducing mortality.

scholarly journals Cost-Effective Analysis of Control Strategies to Reduce the Prevalence of Cutaneous Leishmaniasis, Based on a Mathematical Model

2018 ◽  
Vol 23 (3) ◽  
pp. 38
Author(s):  
Dibyendu Biswas ◽  
Suman Dolai ◽  
Jahangir Chowdhury ◽  
Priti Roy ◽  
Ellina Grigorieva
Keyword(s):  
Mathematical Model ◽  
Cutaneous Leishmaniasis ◽  
Control Strategies ◽  
Cost Effective ◽  
Sand Fly ◽  
Effective Control ◽  
Theoretic Approach ◽  
Epidemic Disease ◽  
And Control

Leishmaniasis is a neglected tropical vector-borne epidemic disease, and its transmission is a complex process. Zoonotic transmission to humans or animals occurs through the bites of female Phlebotominae sand flies. Here, reservoir is considered as a major source of endemic pathogen pool for disease outbreak, and the role of more than one reservoir animal becomes indispensable. To study the role of the reservoir animals on disease dynamics, a mathematical model was constructed consisting of susceptible and infected populations of humans and two types of reservoir (animal) and vector populations, respectively. Our aim is to prevent the disease by applying a control theoretic approach, when more than one type of reservoir animal exists in the region. We use drugs like sodium stibogluconate and meglumine antimoniate to control the disease for humans and spray insecticide to control the sand fly population. Similarly, drugs are applied for infected reservoir animals of Types A and B. We calculated the cost-effectiveness of all possible combinations of the intervention and control policies. One of our findings is that the most cost-effective case for Leishmania control is the spray of insecticides for infected sand fly vector. Alternate strategic cases were compared to address the critical shortcomings of single strategic cases, and a range of control strategies were estimated for effective control and economical benefit of the overall control strategy. Our findings provide the most innovative techniques available for application to the successful eradication of cutaneous leishmaniasis in the future.

scholarly journals Modeling the COVID-19 Epidemic With Multi-Population and Control Strategies in the United States

2022 ◽  
Vol 9 ◽  
Author(s):  
Deshun Sun ◽  
Xiaojun Long ◽  
Jingxiang Liu
Keyword(s):  
United States ◽  
Mathematical Model ◽  
Control Strategies ◽  
The United States ◽  
Basic Reproductive Number ◽  
Effective Control ◽  
Model Parameters ◽  
Cumulative Number ◽  
And Control ◽  
Sensitive Parameters

As of January 19, 2021, the cumulative number of people infected with coronavirus disease-2019 (COVID-19) in the United States has reached 24,433,486, and the number is still rising. The outbreak of the COVID-19 epidemic has not only affected the development of the global economy but also seriously threatened the lives and health of human beings around the world. According to the transmission characteristics of COVID-19 in the population, this study established a theoretical differential equation mathematical model, estimated model parameters through epidemiological data, obtained accurate mathematical models, and adopted global sensitivity analysis methods to screen sensitive parameters that significantly affect the development of the epidemic. Based on the established precise mathematical model, we calculate the basic reproductive number of the epidemic, evaluate the transmission capacity of the COVID-19 epidemic, and predict the development trend of the epidemic. By analyzing the sensitivity of parameters and finding sensitive parameters, we can provide effective control strategies for epidemic prevention and control. After appropriate modifications, the model can also be used for mathematical modeling of epidemics in other countries or other infectious diseases.

scholarly journals A model for the spread and control of pandemic influenza in an isolated geographical region

2006 ◽  
Vol 4 (13) ◽  
pp. 325-330 ◽  
Author(s):  
M.G Roberts ◽  
M Baker ◽  
L.C Jennings ◽  
G Sertsou ◽  
N Wilson
Keyword(s):  
Mathematical Model ◽  
Pandemic Influenza ◽  
Control Strategies ◽  
Influenza Pandemic ◽  
Antiviral Treatment ◽  
Geographical Area ◽  
Antiviral Prophylaxis ◽  
Single Strategy ◽  
And Control ◽  
Modest Level

In the event of an influenza pandemic, the most probable way in which the virus would be introduced to an isolated geographical area is by an infected traveller. We use a mathematical model, structured on the location at which infection occurs and based on published parameters for influenza, to describe an epidemic in a community of one million people. The model is then modified to reflect a variety of control strategies based on social distancing measures, targeted antiviral treatment and antiviral prophylaxis and home quarantine, and the effectiveness of the strategies is compared. The results suggest that the only single strategy that would be successful in preventing an epidemic (with 0 =2.0) is targeted antiviral treatment and prophylaxis, and that closing schools combined with either closing work places or home quarantine would only prevent such an epidemic if these strategies were combined with a modest level of antiviral coverage.

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