Journal articles on the topic 'Nicholson'

To see the other types of publications on this topic, follow the link: Nicholson.

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Nicholson.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

WATTS, IAIN P. "‘We want no authors’: William Nicholson and the contested role of the scientific journal in Britain, 1797–1813." British Journal for the History of Science 47, no. 3 (February 11, 2014): 397–419. http://dx.doi.org/10.1017/s0007087413000964.

Full text
Abstract:
AbstractThis article seeks to illuminate the shifting and unstable configuration of scientific print culture around 1800 through a close focus on William Nicholson's Journal of Natural Philosophy, Chemistry, and the Arts, generally known as Nicholson's Journal. Viewing Nicholson as a mediator between the two spheres of British commercial journalism and scientific enquiry, I investigate the ways he adapted practices and conventions from the domain of general-readership monthly periodicals for his Journal, forging a virtual community of scientific knowledge exchange in print. However, in pursing this project Nicholson ran up against disreputable associations connected with the politics of journalism and came into conflict with more established models of scientific publication. To illustrate this, I turn to examine in detail the practice of reprinting, a technique of information transmission which the Journal adapted from general periodicals and newspapers, looking at a clash between Nicholson and the Royal Society that exposes disagreements over the appropriate role for journals during this period of reorganization in the scientific world.
APA, Harvard, Vancouver, ISO, and other styles
2

Tarbell, Roberta K., and Judith Collins. "Winifred Nicholson." Woman's Art Journal 10, no. 2 (1989): 52. http://dx.doi.org/10.2307/1358225.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

DAVIES, VERONICA. "WILLIAM NICHOLSON." Art Book 12, no. 4 (November 2005): 64–65. http://dx.doi.org/10.1111/j.1467-8357.2005.00621_1.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Dubois, Donald, George Knorr, and Gerald Payne. "Dwight Nicholson." Physics Today 45, no. 10 (October 1992): 136. http://dx.doi.org/10.1063/1.2809850.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Murray, Virginia. "Andrew Nicholson." Keats-Shelley Review 24, no. 1 (October 2010): 91–92. http://dx.doi.org/10.1179/095241410x522834.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Davies, Louise, and Janet Nicholls. "Christine Nicholson." British Journal of Occupational Therapy 71, no. 6 (June 2008): 268. http://dx.doi.org/10.1177/030802260807100621.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Heaton, Roger. "Joanna Nicholson - Joanna Nicholson, Gyre. Nicholson, Whiteside, Hagen, Nangle, Sweeney. TNW Music, TNWM-07." Tempo 76, no. 302 (September 29, 2022): 94–95. http://dx.doi.org/10.1017/s0040298222000511.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ward, Robyn. "Nicholson Baker Redux." OLA Quarterly 16, no. 1 (2010): 5–8. http://dx.doi.org/10.7710/1093-7374.1267.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Nicholson, Mervyn. "Mervyn Nicholson Responds." College English 50, no. 5 (September 1988): 580. http://dx.doi.org/10.2307/377495.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Milne, J. S. "John William Nicholson." BMJ 325, no. 7366 (September 28, 2002): 716g—716. http://dx.doi.org/10.1136/bmj.325.7366.716/g.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Keddie, N. "William Francis Nicholson." BMJ 325, no. 7371 (November 2, 2002): 1040h—1040. http://dx.doi.org/10.1136/bmj.325.7371.1040/h.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Sen, Amartya. "professor michael nicholson." European Political Science 1, no. 1 (September 2001): 78–79. http://dx.doi.org/10.1057/eps.2001.16.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

KMGK. "Arthur Nicholson Munro." Psychiatric Bulletin 15, no. 5 (May 1991): 316–17. http://dx.doi.org/10.1192/pb.15.5.316-a.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Staley, Allen. "William Nicholson (review)." Victorian Studies 48, no. 2 (2006): 352–54. http://dx.doi.org/10.1353/vic.2006.0101.

Full text
APA, Harvard, Vancouver, ISO, and other styles
15

Jones, Bruce Vivash. "Gordon Nicholson Henderson." Veterinary Record 184, no. 3 (January 17, 2019): 756. http://dx.doi.org/10.1136/vr.l282.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Nicholson, J. "Robert Dunning Nicholson." BMJ 350, jan02 7 (January 2, 2015): h7. http://dx.doi.org/10.1136/bmj.h7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Constable, J. N. "Guy Nicholson Constable." BMJ 324, no. 7337 (March 9, 2002): 616b—616. http://dx.doi.org/10.1136/bmj.324.7337.616/b.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Moore, Gregory. "Nicholson Versus Ingram on the History of Political Economy and a Charge of Plagiarism." Journal of the History of Economic Thought 22, no. 4 (December 2000): 433–60. http://dx.doi.org/10.1080/10427710020006190.

Full text
Abstract:
In 1885 John Kells Ingram published a lengthy article on the history of political economy in the Encyclopaedia Britannica, and in 1888 he republished this same article, with only minor changes, as a book entitled The History of Political Economy. Ingram unashamedly interpreted the historical development of political economy from a Comtean variant of the historicist perspective, and, for this reason, these publications became extremely important for the methodological debate, known as the English Methodenstreit, then raging between the orthodox and historical economists. Although the historicist message dovetailed into Ingram's historical narrative was clearly contentious and polemical, the reviews of both versions of this history from either side of the conceptual divide were overwhelmingly positive. Two exceptions were damning anonymous newspaper reviews in The Scotsman: one in 1885 in response to the Encyclopaedia Britannica article, and another in 1888 in response to the book. It is apparent from an entry made in the diary of John Neville Keynes that the first of these reviews was written by Joseph Shield Nicholson (JNK, July 28, 1885, Add 7834), and since the articles are strikingly similar in tone, substance, and style, and since Nicholson wrote other reviews for The Scotsman, it is safe to assume that the second article was also written by Nicholson. The substance of Nicholson's critique can be reduced to two main accusations: first, that Ingram was neither qualified to write a history of political economy nor competent to comment on the methodological issues then under scrutiny, and second, that Ingram had brazenly plagiarized passages drawn from various German histories of political economy.
APA, Harvard, Vancouver, ISO, and other styles
19

Xu, Changjin, Wei Zhang, and Peiluan Li. "Periodic Oscillating Dynamics for a Delayed Nicholson-Type Model with Harvesting Terms." Mathematical Problems in Engineering 2021 (February 4, 2021): 1–11. http://dx.doi.org/10.1155/2021/9734342.

Full text
Abstract:
In this manuscript, a delayed Nicholson-type model with linear harvesting terms is investigated. Applying coincidence degree theory, we establish a sufficient condition which guarantees the existence of positive periodic solutions for the delayed Nicholson-type model. By constructing suitable Lyapunov functions, a new criterion for the uniqueness and global attractivity of the periodic solution of the Nicholson-type delay system is obtained. The derived results of this article are completely new and complement some previous investigations.
APA, Harvard, Vancouver, ISO, and other styles
20

Pachut, Joseph F., Robert L. Anstey, and Alan S. Horowitz. "The H. A. Nicholson Collection of Paleozoic stenolaemate bryozoans: comparison of cladistic and phenetic classifications." Journal of Paleontology 68, no. 5 (September 1994): 978–94. http://dx.doi.org/10.1017/s0022336000026597.

Full text
Abstract:
Until the late 1960's, most of Nicholson's types of Paleozoic bryozoans were not available for study. We present a set of coded characters of many of Nicholson's types, which should assist in bringing his species into conformity with current taxonomic standards so that his species can be consistently recognized and used in biostratigraphic, paleobiogeographic, and evolutionary studies.Cladistic and phenetic analyses of these species permit comparisons between inferred phylogenies of Nicholson specimens, adaptive morphospace, and treatise-based systematic relationships. Specimen-based cladistic and phenetic analyses of Nicholson's species both produce clusters that are congruent with existing family-level taxonomic assignments of species in the collection. However, cladistic analysis more fully retrieves the pattern of branching, or degree of relatedness, among higher taxa. Phenetic clusters represent adaptive peaks in morphospace for these specimens, but higher level “phenons” are strongly affected by multiple evolution of the same character states.
APA, Harvard, Vancouver, ISO, and other styles
21

Page, Alex, Philip R. Wilby, Claire J. T. Mellish, Mark Williams, and Jan A. Zalasiewicz. "Dawsonia Nicholson: linguliform brachiopods, crustacean tail-pieces and a problematicum rather than graptolite ovarian vesicles." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 99, no. 3-4 (December 2008): 251–66. http://dx.doi.org/10.1017/s175569100900704x.

Full text
Abstract:
ABSTRACTThough little is known of the graptoloid reproductive mechanism, graptolites with putatively sac-like appendages, supposedly ovarian vesicles, have been known from the Moffat Shales Group, Southern Uplands, Scotland, for over 150 years. Locally, these co-occur with isolated, two-dimensional, discoidal or ovato-triangular fossils. In the 1870s, Nicholson interpreted these isolated fossils as being graptoloid ‘egg-sacs’ detached from their parent and existing as free-swimming bodies. He assigned them to his genus Dawsonia, though the name was pre-occupied by a trilobite, and named four species: D. campanulata, D. acuminata, D. rotunda and D. tenuistriata. A reassessment of Nicholson’s type material from the Silurian of Moffatdale, Scotland, and from the Ordovician Lévis Formation of Quebec, Canada, shows that Dawsonia Nicholson comprises the inarticulate brachiopods Acrosaccus? rotundus, Paterula? tenuistriata and Discotreta cf. levisensis, the tail-piece of the crustacean Caryocaris acuminata and the problematic fossil D. campanulata. Though D. campanulata resembles sac-like graptolite appendages, morphometric analysis reveals the similarity to be superficial and the systematic position of this taxon remains uncertain. There is no definite evidence of either D. campanulata or sac-like graptoloid appendages having had a reproductive function.
APA, Harvard, Vancouver, ISO, and other styles
22

Webb, Timothy. "Memories of Andrew Nicholson." Byron Journal 38, no. 1 (January 2010): 1–6. http://dx.doi.org/10.3828/bj.2010.3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
23

Wheeler, T. N. R. J. "Charles Christopher Nicholson Roberts." BMJ 348, jan27 10 (January 27, 2014): g1147. http://dx.doi.org/10.1136/bmj.g1147.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Wakeley, C., and L. d. Cossart. "John Cecil Nicholson Wakeley." BMJ 345, jul04 2 (July 4, 2012): e4042-e4042. http://dx.doi.org/10.1136/bmj.e4042.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

al-Zaman Furuzanfar, Badiʿ, and Rasoul Sorkhabi. "Homage to Professor Nicholson." Mawlana Rumi Review 2, no. 1 (January 25, 2011): 125–34. http://dx.doi.org/10.1163/25898566-00201011.

Full text
APA, Harvard, Vancouver, ISO, and other styles
26

PLEVA, EDWARD G. "NORMAN NICHOLSON 1920–1984." Canadian Geographer/Le Géographe canadien 29, no. 2 (June 1985): 98–99. http://dx.doi.org/10.1111/j.1541-0064.1985.tb00352.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Ali, Ramyi N., and Awni M. Gaftan. "The Stability Of Crank – Nicholson and Explicit Methods for Numerical Solution for Sine – Gordon Equation." Tikrit Journal of Pure Science 28, no. 4 (August 25, 2023): 88–96. http://dx.doi.org/10.25130/tjps.v28i4.1532.

Full text
Abstract:
In This Paper, We Solve The Sine – Gordon Equation by two Numerical Methods : Crank – Nicholson and Explicit and we discuss The Stabilities , and we obtained That The Stability Crank – Nicholson Methods is More Than The Stability Of Explicit Methods.
APA, Harvard, Vancouver, ISO, and other styles
28

Edwards, Sally, and Behnam Talebi. "New deep crustal seismic data acquisition program for NWQ's frontier petroleum basins." APPEA Journal 59, no. 2 (2019): 869. http://dx.doi.org/10.1071/aj18084.

Full text
Abstract:
The Georgina and South Nicholson basins and the Isa Superbasin of North West Queensland (NWQ), represent frontier basins earmarked for examination of resource potential under the Strategic Resources Exploration Program. Little exploration has occurred for petroleum resources in these basins although a proven petroleum system exists in both the Isa Superbasin and the Georgina Basin with demonstrated flow at sub-commercial rates. To increase knowledge of the petroleum system, define the extent of the South Nicholson Basin and examine basin architecture, Geoscience Australia acquired deep (to 20-s listening time) seismic data across the South Nicholson Basin and northern Isa Superbasin area in 2017. However, this survey focused on broader structural architecture definition across the Proterozoic Isa Superbasin and South Nicholson and McArthur basins. Little is understood of the petroleum system in the southern Isa Superbasin, or even if this structure is part of the Isa Superbasin, where Proterozoic gas is inferred from mineral boreholes and oil stained Cambrian-aged carbonates exist. To increase understanding of this southern region, the Queensland Government acquired a new NWQ SEEBASE® (depth to basement) model in 2018, and will be undertaking a 2D deep seismic survey within the Camooweal region to better understand the structural architecture, sediment thicknesses and seismic characteristic of packages of this southern area. The seismic survey is centred on the Georgina Basin and will tie into the South Nicholson survey – extending knowledge further south across major structures featured in the SEEBASE® model.
APA, Harvard, Vancouver, ISO, and other styles
29

Stearn, Colin W. "The type species of Stictostroma Parks, 1936 (Porifera, Stromatoporoidea)." Journal of Paleontology 69, no. 1 (January 1995): 20–27. http://dx.doi.org/10.1017/s0022336000026883.

Full text
Abstract:
The typical species of Parks' stromatoporoid genus Stictostroma designated as Stromatopora mammillata Nicholson, 1873, and renamed S. mamilliferum to avoid homonymy by Galloway and St. Jean (1957), had unknown internal structure because Nicholson's type specimens were not sectioned. Parks' (1936) diagnosis of generic characters was based on specimens from a location (Gorrie) far from the type locality of S. mammillata that he assumed were conspecific with Nicholson's species. Investigation of the type specimens of Stromatopora mammillata = Stictostroma mamilliferum by thin sections shows that they are very poorly preserved and not conspecific with the specimens on which Parks based the genus. Because paleontologists for many years have used Stictostroma as amended from Parks' description by Galloway and St. Jean, the species from Gorrie that clearly shows these characters should be recognized as the typical species and given a new name.
APA, Harvard, Vancouver, ISO, and other styles
30

Zhang, Ruojun, and Fuyun Lian. "The Existence and Uniqueness of Positive Periodic Solutions for a Class of Nicholson-Type Systems with Impulses and Delays." Abstract and Applied Analysis 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/980935.

Full text
Abstract:
By establishing the equivalence, respectively, to the existence and uniqueness of positive periodic solutions for corresponding delay Nicholson-type systems without impulses, some criteria for the existence and uniqueness of positive periodic solutions for a class of Nicholson-type systems with impulses and delays are established. The results of this paper extend some earlier works reported in the literature.
APA, Harvard, Vancouver, ISO, and other styles
31

Regnier, Daniel. "G. Nicholson, Heidegger on truth." Phenomenological Reviews 6 (2020): 26. http://dx.doi.org/10.19079/pr.6.26.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Whitehouse, H. L. K. "Tubers inBryum dixoniiCard. ex Nicholson." Journal of Bryology 17, no. 2 (January 1992): 376–77. http://dx.doi.org/10.1179/jbr.1992.17.2.376.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Robson, H. E. "Surgeon Captain C. B. Nicholson." British Journal of Sports Medicine 21, no. 1 (March 1, 1987): 21. http://dx.doi.org/10.1136/bjsm.21.1.21.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Olivier, Guilhem. "Henry B. Nicholson (1925-2007)." Journal de la société des américanistes 93, no. 93-2 (December 2, 2007): 153–71. http://dx.doi.org/10.4000/jsa.8233.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Shlomo, Elka Tenner. "Nicholson Baker Wasn't All Wrong." Acquisitions Librarian 15, no. 30 (November 6, 2003): 117–30. http://dx.doi.org/10.1300/j101v15n30_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Nicholson, Helen. "Research as Confession Helen Nicholson." Research in Drama Education: The Journal of Applied Theatre and Performance 4, no. 1 (February 1999): 100–103. http://dx.doi.org/10.1080/1356978990040112.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Nicholson, Lindsay. "Once a physicist...Lindsey Nicholson." Physics World 17, no. 9 (September 2004): 55. http://dx.doi.org/10.1088/2058-7058/17/9/48.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Nicholson, Donald E. "IUBMB-Nicholson metabolic pathways charts." Biochemistry and Molecular Biology Education 29, no. 2 (March 2001): 42–44. http://dx.doi.org/10.1111/j.1539-3429.2001.tb00067.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
39

Hibbert, Jack. "JOHN LEONARD NICHOLSON (1916-1990)." Review of Income and Wealth 37, no. 4 (December 1991): 471. http://dx.doi.org/10.1111/j.1475-4991.1991.tb00387.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Simmonds, Adam. "The Music of George Nicholson." Tempo, no. 183 (December 1992): 18–24. http://dx.doi.org/10.1017/s0040298200017563.

Full text
Abstract:
George Nicholson (b.1949) is one of the generation of composers who emerged in the early 1970s from York University, where he read Music and English. He studied composition under Bernard Rands and, after a period of school teaching, returned to undertake postgraduate composition studies with David Blake, gaining a PhD in 1979. The earliest influence on his work, and probably the most significant in terms of musical philosophy, was Henri Pousseur. Like Pousseur, Nicholson has looked to Schoenberg for a means of finding a path toward a synthesis of old and new, and an awareness of his position in the wider context of musical history.
APA, Harvard, Vancouver, ISO, and other styles
41

Nicholson, D. "IUBMB-Nicholson metabolic pathways charts." Biochemistry and Molecular Biology Education 29, no. 2 (March 2001): 42–44. http://dx.doi.org/10.1016/s1470-8175(01)00010-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Mealey, Linda. "Response to Rushton and Nicholson." Ethology and Sociobiology 10, no. 4 (April 1989): 309–10. http://dx.doi.org/10.1016/0162-3095(89)90007-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

Azzi, Angelo. "In memory of Donald Nicholson." IUBMB Life 64, no. 8 (June 20, 2012): 659–60. http://dx.doi.org/10.1002/iub.1061.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Voet, Judith G., and Donald Voet. "Donald E. Nicholson, 1916-2012." Biochemistry and Molecular Biology Education 40, no. 4 (July 2012): 221. http://dx.doi.org/10.1002/bmb.20626.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Long, Max. "Light, Vision and Observation in Norman Nicholson’s Topographical Notes." Bulletin of the John Rylands Library 96, no. 2 (September 1, 2020): 133–48. http://dx.doi.org/10.7227/bjrl.96.2.7.

Full text
Abstract:
This article examines a notebook owned by the poet and topographical writer Norman Nicholson, which is held in his collection at the John Rylands Library. The notebook, entitled Topographical Notes: Morecambe Bay etc., includes detailed notes and sketches taken at numerous locations in Cumbria, many of which recur in Nicholson’s poetry and topographical texts. The article analyses Nicholson’s note-taking practices, with particular attention to sensory experience and how this was expressed by the writer. The notebook is especially valuable because no other book of its kind survives in Nicholson’s archive, and because it can be dated towards the end of a long interlude in his career as a poet. The notes can be understood as lying in the space between Nicholson’s poetry and his topographical writing: although ostensibly collecting information for Greater Lakeland (1969), Nicholson’s treatment of light and vision suggests that he was beginning to experiment with some of the themes that characterise his later poetry. The article reflects on what these notes can tell us about Nicholson’s note-taking ‘in the field’, and suggests that his habit of treating the landscape as a repository of history is akin to what Kitty Hauser has called the ‘archaeological imagination’.
APA, Harvard, Vancouver, ISO, and other styles
46

Klaaren, Jonathan, and Theunis Roux. "The Nicholson Judgment: An Exercise in Law and Politics." Journal of African Law 54, no. 1 (March 4, 2010): 143–55. http://dx.doi.org/10.1017/s0021855309990209.

Full text
Abstract:
AbstractThe Nicholson judgment was clearly a precipitating factor in the resignation of former South African President Thabo Mbeki in 2008. Engaging with the judgment in its own terms, this note first puts forward a best legal interpretation of the judgment, covering the doctrines of prosecutorial independence and legitimate expectations. It then identifies the degree to which the comment in the judgment may be termed politically activist. In the authors' view, Nicholson tackled political issues in his judgment that he need not have: in particular, allegations of executive interference in the independence of the prosecutions authority. Assuming that Nicholson J's text may be read as an attempt to bolster the legitimacy of the judiciary, the note explores whether it succeeds on those terms and concludes that the judgment is ultimately an example of failed dramatic art.
APA, Harvard, Vancouver, ISO, and other styles
47

Ossandón, Gustavo, and Daniel Sepúlveda. "Existence and exponential stability of periodic solutions of Nicholson-type systems with nonlinear density-dependent mortality and linear harvesting." Electronic Journal of Qualitative Theory of Differential Equations, no. 15 (2023): 1–18. http://dx.doi.org/10.14232/ejqtde.2023.1.15.

Full text
Abstract:
In this work we study a Nicholson-type periodic system with variable delay, density-dependent mortality and linear harvesting rate. Using the topological degree and Lyapunov stability theories, we obtain sufficient conditions that allow us to demonstrate the existence of periodic solutions for the Nicholson-type system and, under suitable conditions, the uniqueness and local exponential stability of the periodic solution is established. We illustrate our results with an example and numerical simulations.
APA, Harvard, Vancouver, ISO, and other styles
48

Barbosa, Thayná Andrade, and Vagner Weide Rodrigues. "Modificação no modelo hospedeiro-parasitoide de Nicholson-Bailey espacialmente distribuído com Rede de Mapas Acoplados." REMAT: Revista Eletrônica da Matemática 8, no. 1 (February 1, 2022): e3002. http://dx.doi.org/10.35819/remat2022v8i1id5287.

Full text
Abstract:
Diversas dinâmicas populacionais podem ser modeladas por meio de equações a diferenças, com as quais o tempo é considerado discreto e a variável de estado é contínua. Dos modelos discretos mais conhecidos, o de Nicholson-Bailey ganha destaque por ser um dos primeiros a tentar retratar uma dinâmica hospedeiro-parasitoide por meio de equações a diferenças. Embora tenha sido utilizado como base para a formulação de modelos mais complexos, o modelo de Nicholson-Bailey, em seu formato original, apresenta equilíbrio de coexistência instável para qualquer conjunto de parâmetros. Diante disso, diversas modificações foram propostas para torná-lo mais próximo ao que se espera na natureza. O presente trabalho tem como objetivo apresentar o estudo de uma modificação no modelo de Nicholson-Bailey em duas etapas: a primeira consiste em inserir um fator de crescimento dependente da densidade para a população de hospedeiros; e a segunda, em adicionar a distribuição espacial via Rede de Mapas Acoplados no modelo já modificado. A partir da análise de estabilidade dos equilíbrios e simulações numéricas, os resultados sugerem que a partir da modificação proposta, o modelo de Nicholson-Bailey apresenta equilíbrio de coexistência estável e a inclusão do espaço não contribui para a sua desestabilização. Além disso, o modelo espacial exibe diversos padrões dependentes da escolha dos parâmetros, como ondas, espirais e estruturas cristalinas.
APA, Harvard, Vancouver, ISO, and other styles
49

Gulddal, Jesper. "Plottet mod plottet." K&K - Kultur og Klasse 28, no. 90 (February 10, 2000): 71–96. http://dx.doi.org/10.7146/kok.v28i90.21059.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Ashyralyev, Allaberen, Evren Hincal, and Bilgen Kaymakamzade. "Crank-Nicholson difference scheme for the system of nonlinear parabolic equations observing epidemic models with general nonlinear incidence rate." Mathematical Biosciences and Engineering 18, no. 6 (2021): 8883–904. http://dx.doi.org/10.3934/mbe.2021438.

Full text
Abstract:
<abstract><p>In this work, we study second order Crank-Nicholson difference scheme (DS) for the approximate solution of problem (1). The existence and uniqueness of the theorem on a bounded solution of Crank-Nicholson DS uniformly with respect to time step $ \tau $ is proved. In practice, theoretical results are presented on four systems of nonlinear parabolic equations to explain how it works on one and multidimensional problems. Numerical results are provided.</p></abstract>
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography