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Original Articles
- A Differential Equation Model for the Dynamics of Youth Gambling
- Tae Sug Do, Young S. Lee
- Osong Public Health Res Perspect. 2014;5(4):233-241. Published online August 31, 2014
- DOI: https://doi.org/10.1016/j.phrp.2014.06.008
- 2,199 View
- 12 Download
- 7 Citations
-
Abstract
PDF - Objectives
We examine the dynamics of gambling among young people aged 16–24 years, how prevalence rates of at-risk gambling and problem gambling change as adolescents enter young adulthood, and prevention and control strategies.
Methods
A simple epidemiological model is created using ordinary nonlinear differential equations, and a threshold condition that spreads gambling is identified through stability analysis. We estimate all the model parameters using a longitudinal prevalence study by Winters, Stinchfield, and Botzet to run numerical simulations. Parameters to which the system is most sensitive are isolated using sensitivity analysis.
Results
Problem gambling is endemic among young people, with a steady prevalence of approximately 4–5%. The prevalence of problem gambling is lower in young adults aged 18–24 years than in adolescents aged 16–18 years. At-risk gambling among young adults has increased. The parameters to which the system is most sensitive correspond to primary prevention.
Conclusion
Prevention and control strategies for gambling should involve school education. A mathematical model that includes the effect of early exposure to gambling would be helpful if a longitudinal study can provide data in the future. -
Citations
Citations to this article as recorded by
- Whose Responsibility Is It to Prevent or Reduce Gambling Harm? A Mapping Review of Current Empirical Research
Murat Akçayır, Fiona Nicoll, David G. Baxter, Zachary S. Palmer
International Journal of Mental Health and Addicti.2022; 20(3): 1516. CrossRef - Mathematical Modeling of the Population Dynamics of Age-Structured Criminal Gangs with Correctional Intervention Measures
Oluwasegun M. Ibrahim, Daniel Okuonghae, Monday N.O. Ikhile
Applied Mathematical Modelling.2022; 107: 39. CrossRef - Emerging Gambling Problems and Suggested Interventions: A Systematic Review of Empirical Research
Murat Akçayır, Fiona Nicoll, David G. Baxter
Journal of Gambling Studies.2022;[Epub] CrossRef - Optimal control model for criminal gang population in a limited-resource setting
Oluwasegun M. Ibrahim, Daniel Okuonghae, Monday N. O. Ikhile
International Journal of Dynamics and Control.2022;[Epub] 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 - Optimal Implementation of Intervention Strategies for Elderly People with Ludomania
Byul Nim Kim, M.A. Masud, Yongkuk Kim
Osong Public Health and Research Perspectives.2014; 5(5): 266. CrossRef
- Whose Responsibility Is It to Prevent or Reduce Gambling Harm? A Mapping Review of Current Empirical Research
- Role of Active and Inactive Cytotoxic Immune Response in Human Immunodeficiency Virus Dynamics
- Hernan Dario Toro Zapata, Angelica Graciela Caicedo Casso, Derdei Bichara, Sunmi Lee
- Osong Public Health Res Perspect. 2014;5(1):3-8. Published online February 28, 2014
- DOI: https://doi.org/10.1016/j.phrp.2014.01.001
- 2,181 View
- 25 Download
- 8 Citations
-
Abstract
PDF
- Objectives
Mathematical models can be helpful to understand the complex dynamics of human immunodeficiency virus infection within a host. Most of work has studied the interactions of host responses and virus in the presence of active cytotoxic immune cells, which decay to zero when there is no virus. However, recent research highlights that cytotoxic immune cells can be inactive but never be depleted.
Methods
We propose a mathematical model to investigate the human immunodeficiency virus dynamics in the presence of both active and inactive cytotoxic immune cells within a host. We explore the impact of the immune responses on the dynamics of human immunodeficiency virus infection under different disease stages.
Results
Standard mathematical and numerical analyses are presented for this new model. Specifically, the basic reproduction number is computed and local and global stability analyses are discussed.
Conclusion
Our results can give helpful insights when designing more effective drug schedules in the presence of active and inactive immune responses. -
Citations
Citations to this article as recorded by- A Multi-Scale Model for the Spread of HIV in a Population Considering the Immune Status of People
Sol de Amor Vásquez-Quintero, Hernán Darío Toro-Zapata, Dennis Alexánder Prieto-Medellín
Processes.2021; 9(11): 1924. CrossRef - Qualitative investigation of cytolytic and noncytolytic immune response in an HBV model
John G. Alford, Stephen A. McCoy
Involve, a Journal of Mathematics.2020; 13(3): 455. CrossRef - Mathematical Model Describing HIV Infection with Time-Delayed CD4 T-Cell Activation
Hernán Darío Toro-Zapata, Carlos Andrés Trujillo-Salazar, Edwin Mauricio Carranza-Mayorga
Processes.2020; 8(7): 782. CrossRef - The Role of Immune Response in Optimal HIV Treatment Interventions
Hernán Toro-Zapata, Angélica Caicedo-Casso, Sunmi Lee
Processes.2018; 6(8): 102. CrossRef - Evaluación teórica de estrategias óptimas y sub-óptimas de terapia antirretroviral para el control de la infección por VIH
Hernán Darío Toro-Zapata, Carlos Andrés Trujillo-Salazar, Dennis Alexánder Prieto-Medellín
Revista de Salud Pública.2018; 20(1): 117. CrossRef - Summing Up Again
Hae-Wol Cho, Chaeshin Chu
Osong Public Health and Research Perspectives.2014; 5(4): 177. CrossRef - Roll the Dice
Hae-Wol Cho, Chaeshin Chu
Osong Public Health and Research Perspectives.2014; 5(5): 243. CrossRef - Journal Publishing: Never Ending Saga
Hae-Wol Cho, Chaeshin Chu
Osong Public Health and Research Perspectives.2014; 5(1): 1. CrossRef
- A Multi-Scale Model for the Spread of HIV in a Population Considering the Immune Status of People
- 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
- 2,104 View
- 13 Download
- 9 Citations
-
Abstract
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
- Quality Attributes of Fat-free Sausage Made of Chicken Breast and Liquid Egg White
- 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
- 2,234 View
- 13 Download
- 10 Citations
-
Abstract
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
- Impact of the future coastal water temperature scenarios on the risk of potential growth of pathogenic Vibrio marine bacteria
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