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Yongkuk Kim 6 Articles
Effects of Timely Control Intervention on the Spread of Middle East Respiratory Syndrome Coronavirus Infection
Ilsu Choi, Dong Ho Lee, Yongkuk Kim
Osong Public Health Res Perspect. 2017;8(6):373-376.   Published online December 31, 2017
DOI: https://doi.org/10.24171/j.phrp.2017.8.6.03
  • 3,145 View
  • 27 Download
  • 1 Citations
AbstractAbstract PDF
Objectives

The 2015 Middle East Respiratory Syndrome Coronavirus (MERS-CoV) outbreak in Korea caused major economic and social problems. The control intervention was conducted during the MERS-CoV outbreak in Korea immediately after the confirmation of the index case. This study investigates whether the early risk communication with the general public and mass media is an effective preventive strategy.

Methods

The SEIR (Susceptible, Exposed, Infectious, Recovered) model with estimated parameters for the time series data of the daily MERS-CoV incidence in Korea was considered from May to December 2015. For 10,000 stochastic simulations, the SEIR model was computed using the Gillespie algorithm. Depending on the time of control intervention on the 20th, 40th, and 60th days after the identification of the index case, the box plots of MERS-CoV incidences in Korea were computed, and the results were analyzed via ANOVA.

Results

The box plots showed that there was a significant difference between the non-intervention and intervention groups (the 20th day, 40th day, and 60th day groups) and seemed to show no significant difference based on the time of intervention. However, the ANOVA revealed that early intervention was a good strategy to control the disease.

Conclusion

Appropriate risk communication can secure the confidence of the general public in the public health authorities.

Citations

Citations to this article as recorded by  
  • Healthcare-associated infections: the hallmark of Middle East respiratory syndrome coronavirus with review of the literature
    J.A. Al-Tawfiq, P.G. Auwaerter
    Journal of Hospital Infection.2019; 101(1): 20.     CrossRef
Optimal Implementation of Intervention to Control the Self-harm Epidemic
Byul Nim Kim, M.A. Masud, Yongkuk Kim
Osong Public Health Res Perspect. 2014;5(6):315-323.   Published online December 31, 2014
DOI: https://doi.org/10.1016/j.phrp.2014.10.001
  • 1,881 View
  • 16 Download
  • 3 Citations
AbstractAbstract PDF
Objectives
Deliberate self-harm (DSH) of a young person has been a matter of growing concern to parents and policymakers. Prevention and early eradication are the main interventional techniques among which prevention through reducing peer pressure has a major role in reducing the DSH epidemic. Our aim is to develop an optimal control strategy for minimizing the DSH epidemic and to assess the efficacy of the controls.
Methods
We considered a deterministic compartmental model of the DSH epidemic and two interventional techniques as the control measures. Pontryagin's Maximum Principle was used to mathematically derive the optimal controls. We also simulated the model using the forward-backward sweep method.
Results
Simulation results showed that the controls needed to be used simultaneously to reduce DSH successfully. An optimal control strategy should be adopted, depending on implementation costs for the controls.
Conclusion
The long-term success of the optimum control depends on the implementation cost. If the cost is very high, the control could be used for a short term, even though it fails in the long run. The control strategy, most importantly, should be implemented as early as possible to attack a comparatively fewer number of addicted individuals.

Citations

Citations to this article as recorded by  
  • A review of the use of optimal control in social models
    D. M. G. Comissiong, J. Sooknanan
    International Journal of Dynamics and Control.2018; 6(4): 1841.     CrossRef
  • Adolescent self-harm and risk factors
    Jixiang Zhang, Jianwei Song, Jing Wang
    Asia-Pacific Psychiatry.2016; 8(4): 287.     CrossRef
  • Optimal Intervention Strategies for the Spread of Obesity
    Chunyoung Oh, Masud M A
    Journal of Applied Mathematics.2015; 2015: 1.     CrossRef
Optimal Implementation of Intervention Strategies for Elderly People with Ludomania
Byul Nim Kim, M.A. Masud, Yongkuk Kim
Osong Public Health Res Perspect. 2014;5(5):266-273.   Published online October 31, 2014
DOI: https://doi.org/10.1016/j.phrp.2014.08.006
  • 1,760 View
  • 18 Download
  • 1 Citations
AbstractAbstract PDF
Objectives
Now-a-days gambling is growing especially fast among older adults. To control the gratuitous growth of gambling, well-analyzed scientific strategies are necessary. We tried to analyze the adequacy of the health of society mathematically through immediate treatment of patients with early prevention.
Methods
The model from Lee and Do was modified and control parameters were introduced. Pontryagin's Maximum Principle was used to obtain an optimal control strategy.
Results
Optimal control can be achieved through simultaneous use of the control parameters, though it varies from society to society. The control corresponding to prevention needed to be implemented in full almost all the time for all types of societies. In the case of the other two controls, the scenario was greatly affected depending on the types of societies.
Conclusion
Prevention and treatment for elderly people with ludomania are the main intervention strategies. We found that optimal timely implementation of the intervention strategies was more effective. The optimal control strategy varied with the initial number of gamblers. However, three intervention strategies were considered, among which, preventing people from engaging in all types of gambling proved to be the most crucial.

Citations

Citations to this article as recorded by  
  • Roll the Dice
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2014; 5(5): 243.     CrossRef
Optimal Control Strategy of Plasmodium vivax Malaria Transmission in Korea
Byul Nim Kim, Kyeongah Nah, Chaeshin Chu, Sang Uk Ryu, Yong Han Kang, Yongkuk Kim
Osong Public Health Res Perspect. 2012;3(3):128-136.   Published online June 30, 2012
DOI: https://doi.org/10.1016/j.phrp.2012.07.005
  • 1,945 View
  • 15 Download
  • 10 Citations
AbstractAbstract PDF
Objective To investigate the optimal control strategy for Plasmodium vivax malaria transmission in Korea.
Methods
A Plasmodium vivax malaria transmission model with optimal control terms using a deterministic system of differential equations is presented, and analyzed mathematically and numerically.
Results
If the cost of reducing the reproduction rate of the mosquito population is more than that of prevention measures to minimize mosquito-human contacts, the control of mosquito-human contacts needs to be taken for a longer time, comparing the other situations. More knowledge about the actual effectiveness and costs of control intervention measures would give more realistic control strategies.
Conclusion
Mathematical model and numerical simulations suggest that the use of mosquito-reduction strategies is more effective than personal protection in some cases but not always.

Citations

Citations to this article as recorded by  
  • Optimal control analysis of hepatocytic-erythrocytic dynamics of Plasmodium falciparum malaria
    Titus Okello Orwa, Rachel Waema Mbogo, Livingstone Serwadda Luboobi
    Infectious Disease Modelling.2022; 7(1): 82.     CrossRef
  • Effects of climate change on Plasmodium vivax malaria transmission dynamics: A mathematical modeling approach
    Jung Eun Kim, Yongin Choi, Chang Hyeong Lee
    Applied Mathematics and Computation.2019; 347: 616.     CrossRef
  • Optimal bed net use for a dengue disease model with mosquito seasonal pattern
    Bruno Buonomo, Rossella Della Marca
    Mathematical Methods in the Applied Sciences.2017;[Epub]     CrossRef
  • Optimal control in epidemiology
    Oluwaseun Sharomi, Tufail Malik
    Annals of Operations Research.2017; 251(1-2): 55.     CrossRef
  • A new analysis of infection dynamics: multi-regions discrete epidemic model with an extended optimal control approach
    Omar Zakary, Mostafa Rachik, Ilias Elmouki
    International Journal of Dynamics and Control.2017; 5(4): 1010.     CrossRef
  • On the analysis of a multi-regions discrete SIR epidemic model: an optimal control approach
    Omar Zakary, Mostafa Rachik, Ilias Elmouki
    International Journal of Dynamics and Control.2017; 5(3): 917.     CrossRef
  • Bifurcation and Sensitivity Analysis of Malaria–Schistosomiasis Co-infection Model
    E. A. Bakare, C. R. Nwozo
    International Journal of Applied and Computational.2017; 3(S1): 971.     CrossRef
  • Effect of awareness programs and travel-blocking operations in the control of HIV/AIDS outbreaks: a multi-domains SIR model
    Omar Zakary, Abdelilah Larrache, Mostafa Rachik, Ilias Elmouki
    Advances in Difference Equations.2016;[Epub]     CrossRef
  • Transmission Dynamics and Optimal Control of Malaria in Kenya
    Gabriel Otieno, Joseph K. Koske, John M. Mutiso
    Discrete Dynamics in Nature and Society.2016; 2016: 1.     CrossRef
  • Years of Epidemics (2009–2011): Pandemic Influenza and Foot-and-Mouth Disease Epidemic in Korea
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2013; 4(3): 125.     CrossRef
A Note on Obesity as Epidemic in Korea
Mun Seok Kim, Chaeshin Chu, Yongkuk Kim
Osong Public Health Res Perspect. 2011;2(2):135-140.   Published online June 30, 2011
DOI: https://doi.org/10.1016/j.phrp.2011.08.004
  • 1,895 View
  • 13 Download
  • 9 Citations
AbstractAbstract PDF
Objective To analyze the incidence of obesity in adults aged 19–59 years in Korea and predict its trend in the future.
Methods
We considered a two-compartmental deterministic mathematical model Susceptible-Infected-Susceptible (SIS), a system of difference equations, to predict the evolution of obesity in the population and to propose strategies to reduce its incidence.
Results
The prevention strategy on normal-weight individuals produced a greater improvement than that produced by treatment strategies.
Conclusions
Mathematical model sensitivity analysis suggests that obesity prevention strategies are more effective than obesity treatment strategies in controlling the increase of adult obesity in Korea.

Citations

Citations to this article as recorded by  
  • Quality Attributes of Fat-free Sausage Made of Chicken Breast and Liquid Egg White
    Hyun Jung Lee, Cheorun Jo, Ki Chang Nam, Kyung Haeng Lee
    The Korean Journal of Food And Nutrition.2016; 29(4): 449.     CrossRef
  • Optimal Intervention Strategies for the Spread of Obesity
    Chunyoung Oh, Masud M A
    Journal of Applied Mathematics.2015; 2015: 1.     CrossRef
  • Summing Up Again
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2014; 5(4): 177.     CrossRef
  • Optimal Implementation of Intervention to Control the Self-harm Epidemic
    Byul Nim Kim, M.A. Masud, Yongkuk Kim
    Osong Public Health and Research Perspectives.2014; 5(6): 315.     CrossRef
  • A NOTE ON THE OBESITY AS AN EPIDEMIC
    Chunyoung Oh
    Honam Mathematical Journal.2014; 36(1): 131.     CrossRef
  • Journal Publishing: Never Ending Saga
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2014; 5(1): 1.     CrossRef
  • Roll the Dice
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2014; 5(5): 243.     CrossRef
  • Years of Epidemics (2009–2011): Pandemic Influenza and Foot-and-Mouth Disease Epidemic in Korea
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2013; 4(3): 125.     CrossRef
  • A Tale of Two Fields: Mathematical and Statistical Modeling of Infectious Diseases
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2011; 2(2): 73.     CrossRef
Mathematical Modeling of Vibrio vulnificus Infection in Korea and the Influence of Global Warming
Chaeshin Chu, Younghae Do, Yongkuk Kim, Yasuhisa Saito, Sun-Dong Lee, Haemo Park, Jong-Koo Lee
Osong Public Health Res Perspect. 2011;2(1):51-58.   Published online June 30, 2011
DOI: https://doi.org/10.1016/j.phrp.2011.05.002
  • 1,970 View
  • 13 Download
  • 10 Citations
AbstractAbstract PDF
Objectives
To investigate the possible link between Vibrio vulnificus population size in seawater and water temperature.
Methods
We collected incidence and water temperature data in coastal regions of Korea and constructed a mathematical model that consisted of three classes; susceptible fish, infected fish available to humans, and infected humans.
Results
We developed a mathematical model to connect V. vulnificus incidence with water temperature using estimated bacterial population sizes and actual coastal water temperatures.
Conclusion
Increased V. vulnificus population sizes in marine environments may increase the risk of infection in people who eat at coastal restaurants in Korea. Furthermore, we estimated the near-future number of infected patients using our model, which will help to establish a public-health policy to reduce the disease burden.

Citations

Citations to this article as recorded by  
  • Impact of the future coastal water temperature scenarios on the risk of potential growth of pathogenic Vibrio marine bacteria
    Habiba Ferchichi, André St-Hilaire, Taha B.M.J. Ouarda, Benoît Lévesque
    Estuarine, Coastal and Shelf Science.2021; 250: 107094.     CrossRef
  • Effect of Seawater Temperature Increase on the Occurrence of Coastal Vibrio vulnificus Cases: Korean National Surveillance Data from 2003 to 2016
    Jungsook Kim, Byung Chul Chun
    International Journal of Environmental Research an.2021; 18(9): 4439.     CrossRef
  • Spatiotemporal Dynamics of Vibrio spp. within the Sydney Harbour Estuary
    Nachshon Siboni, Varunan Balaraju, Richard Carney, Maurizio Labbate, Justin R. Seymour
    Frontiers in Microbiology.2016;[Epub]     CrossRef
  • Genotypic Diversity and Population Structure of Vibrio vulnificus Strains Isolated in Taiwan and Korea as Determined by Multilocus Sequence Typing
    Hye-Jin Kim, Jae-Chang Cho, Paul J Planet
    PLOS ONE.2015; 10(11): e0142657.     CrossRef
  • From canonical to non-canonical cyclic nucleotides as second messengers: Pharmacological implications
    Roland Seifert, Erich H. Schneider, Heike Bähre
    Pharmacology & Therapeutics.2015; 148: 154.     CrossRef
  • Journal Publishing: Never Ending Saga
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2014; 5(1): 1.     CrossRef
  • Roll the Dice
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2014; 5(5): 243.     CrossRef
  • Summing Up Again
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2014; 5(4): 177.     CrossRef
  • Years of Epidemics (2009–2011): Pandemic Influenza and Foot-and-Mouth Disease Epidemic in Korea
    Hae-Wol Cho, Chaeshin Chu
    Osong Public Health and Research Perspectives.2013; 4(3): 125.     CrossRef
  • The Road Less Traveled
    Chaeshin Chu
    Osong Public Health and Research Perspectives.2011; 2(1): 1.     CrossRef

PHRP : Osong Public Health and Research Perspectives