Computational dynamics of the Nicholson-Bailey models

Hassan, Sk. Sarif; Ahluwalia, Divya; Maddali, Ravi Kiran; Manglik, Monika

doi:10.1140/epjp/i2018-12164-1

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…The Nicholson-Bailey model was developed for studying population dynamics in parasite-host systems (Sarif Hassan et al, 2018). This model utilizes differential equations to understand the population growth in a host-parasite population ( Jamieson & Reis, 2018).…”

Section: Nicholson-bailey Modelmentioning

confidence: 99%

Applying Mathematics and Engineering Techniques to Cyber Security

Easttom

2021

Actas Del Congreso Internacional De Ingeniería De Sistemas

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While there are many approaches to cybersecurity, it is common for those approaches to be somewhat ad hoc or subjective. Cybersecurity needs a rigorous mathematical and engineering approach, which can be applied to address security issues, evaluate security controls, and investigating security breaches. The current paper maps the use of engineering and mathematical tools for cybersecurity purposes.

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Section: Nicholson-bailey Modelmentioning

confidence: 99%

Applying Mathematics and Engineering Techniques to Cyber Security

Easttom

2021

Actas Del Congreso Internacional De Ingeniería De Sistemas

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“…Two-dimensional chaotic mapping contains fewer periodic windows in branching graphs, a larger range of chaotic parameters, and faster operation compared to one-dimensional chaotic mapping, and these properties are consistent with cryptographic characteristics, so two-dimensional chaotic mapping is often used in key generators. Combined with the Nicholson-Bailey model [40] in the study of biological populations, the two-dimensional difference equation to be studied in this paper is proposed as follows, which is a variation of Nicholson-Bailey model [41].…”

Section: Introductionmentioning

confidence: 99%

Chaotic encryption algorithm with scrambling diffusion based on the Josephus cycle

2023

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Digital images are characterized by high redundancy and strong interpixel correlation. Breaking the correlation between data and improving sensitivity are crucial to protecting image information. To effectively achieve this goal, a chaotic encryption algorithm based on Josephus cycle scrambling diffusion is proposed in this paper. First, the adaptive key is generated by the Hash function to generate the initial value of the chaotic system, which is highly related to the plaintext image. The generation of the adaptive key can effectively resist plaintext attacks. Second, the pseudorandom sequence generated by the two-difference chaotic mapping is applied as the step sequence and direction sequence of Josephus traversal and optimizes Josephus traversal via variable steps and directions; the ranks of plain-text images are scrambled by the Josephus cycle to break the strong correlation between pixels. Finally, the initial cipher-text is divided into blocks to complete the Josephus cycle scrambling diffusion of image blocks, intrablock pixel bits and bit planes. The double permutations at the pixel level and bit level break the high correlation between pixels. Compared with the previous studies, our algorithm’s average entropy of encrypted images is 7.9994, which has slightly improved. The correlation coefficient of the cryptographic image fluctuates up and down by approximately 0. In addition, the algorithm has the advantages of a large key space, high key sensitivity, anti-robust attack, and feasible encryption efficiency.

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“…O modelo Presa-Predador que descreve as interações entre duas espécies, em que uma dessas (presa) dispõe de alimentos em abundância e a outra espécie (predador) tem como suprimento alimentar a população de presas (GAVINA et al, 2018). Mais tarde, Nicholson e Bailey na década de 1930 descreveram a dinâmica populacional de um sistema parasitoide/hospedeiro (HASSAN et al, 2018).…”

Section: Introductionunclassified

Estado Atual de Conhecimento de Dinâmica de Populações

Silva

Pelli

2019

Ens. Cienc.

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Compreender os mecanismos que regulam a dinâmica das populações espacialmente estruturadas é um desafio crítico para os ecólogos e gestores de conservação. A dinâmica de populações é um ramo da ecologia que estuda as populações como sistema em atividades, relacionando as influências ambientais com a distribuição e abundância dos indivíduos e suas interações com o ambiente. O presente artigo é uma revisão bibliográfica, com o objetivo de identificar produções científicas relevantes sobre dinâmica populacional. Para isso, foram utilizados periódicos revisados por pares, na base de Periódicos Capes. A pesquisa foi realizada em junho de 2019, utilizando-se as palavras-chave para título contendo: "population dynamics" e no assunto “ecology”, a partir de 2014, quando o texto completo estava disponível. Foram considerados como critérios de exclusão os artigos publicados antes de 2014. Após a leitura dos títulos dos artigos, foram selecionados 34 artigos que foram lidos na íntegra. Em livros disponíveis no acervo da biblioteca da Universidade Federal do Triângulo Mineiro, foram selecionados quatro livros no tema dinâmica populacional. O referencial teórico aborda os aspectos da dinâmica de populações, tabela de vida, formas de crescimento e interações populacionais. Ressalta-se a necessidade de novos estudos que ainda possuem lacunas, que venha complementar e contribuir para o conhecimento de organismos que faltam ou ainda não possuem registros de estudos. Palavras-chave: Taxas de Natalidade e Mortalidade. Atributos Populacionais. Dispersão. AbstractUnderstanding the mechanisms that regulate the dynamics of spatially structured populations is a critical challenge for ecologists and conservation managers. Population dynamics is a branch of ecology that studies populations as a system in activities, relating environmental influences to the individuals’ distribution and abundance and their interactions with the environment. This article is a bibliographic review, aiming to identify relevant scientific productions about population dynamics. Thus. peer-reviewed journals were used in the Capes Periodicals base, the research was conducted in June 2019, using the keywords for title containing "population dynamics" and in the subject "ecology", from 2014, when the full text was available. Exclusion criteria were: articles published before 2014, after reading the article titles, 34 articles were selected that met the initially proposed criteria and were read in full. In books available in the library collection of the Federal University of Triângulo Mineiro, with a search for the dynamic population theme, 4 books were used. The theoretical framework addresses the aspects of population dynamics, life table, forms of growth and population interactions. It is emphasized the need for further studies that still have gaps, which will complement and contribute to the knowledge of organisms that are missing or do not have study records. Keywords: Birth and Mortality Rates. Population Attributes. Dispersion.

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Computational dynamics of the Nicholson-Bailey models

Cited by 4 publications

References 22 publications

Applying Mathematics and Engineering Techniques to Cyber Security

Applying Mathematics and Engineering Techniques to Cyber Security

Chaotic encryption algorithm with scrambling diffusion based on the Josephus cycle

Estado Atual de Conhecimento de Dinâmica de Populações

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