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Dissertations / Theses on the topic 'Diversité de Shannon'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Arbel, Julyan. "Contributions à la statistique bayésienne non-paramétrique." Phd thesis, Université Paris Dauphine - Paris IX, 2013. http://tel.archives-ouvertes.fr/tel-01067718.

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La thèse est divisée en deux parties portant sur deux aspects relativement différents des approches bayésiennes non-paramétriques. Dans la première partie, nous nous intéressons aux propriétés fréquentistes (asymptotiques) de lois a posteriori pour des paramètres appartenant à l'ensemble des suites réelles de carré sommable. Dans la deuxième partie, nous nous intéressons à des approches non-paramétriques modélisant des données d'espèces et leur diversité en fonction de certaines variables explicatives, à partir de modèles qui utilisent des mesures de probabilité aléatoires.

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2

Washburn, Stephen Jackson. "The Epiphytic Macrolichens of the Greater Cincinnati, Ohio, Metropolitan Area." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1133992448.

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3

Rauwane, Molemi Evelyn. "Microbial diversity and metal pollution from a platinum mine tailings dam in the North-West Province (RSA) / by Molemi Evelyn Rauwane." Thesis, North-West University, 2008. http://hdl.handle.net/10394/4132.

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The aim of this study was to determine the effects of the heavy metal pollution on microbial diversity along the gradient from a platinum mine tailings dam using culture-dependent (plating methods) and molecular methods. Tailings and soil samples were collected from seven sites (6 samples per site) at increasing distances from the tailings dam. Samples were collected over a two year period and included two rainy and two dry periods. Concentrations of various heavy metals were determined using an inductively coupled plasma mass spectrometer (ICP-MS). The results demonstrated that seasonal varia

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4

SANTOS, Vanessa Kelly dos. "Uma generalização da distribuição do índice de diversidade generalizada por Good com aplicação em Ciências Agrárias." Universidade Federal Rural de Pernambuco, 2009. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5372.

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Submitted by (ana.araujo@ufrpe.br) on 2016-08-17T12:42:21Z No. of bitstreams: 1 Vanessa Kelly dos Santos.pdf: 364306 bytes, checksum: 6c79d0925f6821655f91bcd3c8eb64af (MD5)<br>Made available in DSpace on 2016-08-17T12:42:21Z (GMT). No. of bitstreams: 1 Vanessa Kelly dos Santos.pdf: 364306 bytes, checksum: 6c79d0925f6821655f91bcd3c8eb64af (MD5) Previous issue date: 2009-03-23<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Diversity as a concept was first introduced by Williams in Fisher et al. (1943). Later, Good (1953, 1982) proposed a generalized index that

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5

Nascimento, Leonardo Barros. "CLASSIFICAÇÃO DE NÓDULOS PULMONARES EM MALIGNO E BENIGNO UTILIZANDO OS ÍNDICES DE DIVERSIDADE DE SHANNON E DE SIMPSON." Universidade Federal do Maranhão, 2012. http://tedebc.ufma.br:8080/jspui/handle/tede/485.

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Made available in DSpace on 2016-08-17T14:53:20Z (GMT). No. of bitstreams: 1 dissertacao Leonardo.pdf: 864322 bytes, checksum: 557c6817aff39c2f398ebe22a59ad5c6 (MD5) Previous issue date: 2012-04-20<br>FUNDAÇÃO DE AMPARO À PESQUISA E AO DESENVOLVIMENTO CIENTIFICO E TECNOLÓGICO DO MARANHÃO<br>Lung cancer is still the leading cause of cancer mortality worldwide, with one of the lowest survival rates after diagnosis. Therefore, early detection is important to increase the chances of curing the patient. The diagnosis is more accurate if the specialist has more information. In view of the above,

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6

Sousa, Ulysses Santos. "CLASSIFICAÇÃO DE MASSAS NA MAMA A PARTIR DE IMAGENS MAMOGRÁFICAS USANDO ÍNDICE DE DIVERSIDADE DE SHANNON-WIENER." Universidade Federal do Maranhão, 2011. http://tedebc.ufma.br:8080/jspui/handle/tede/467.

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Made available in DSpace on 2016-08-17T14:53:17Z (GMT). No. of bitstreams: 1 Ulysses Santos Sousa.pdf: 1410915 bytes, checksum: 88235f7f4a3bc07a4da1b27c23dc71ca (MD5) Previous issue date: 2011-05-13<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Cancer is one of the biggest health problems worldwide, and the breast cancer is the one that causes more deaths among women. Also it is the second most frequent type in the world. The chances of survival for a patient with breast cancer increases the sooner this disease is discovered. Several Computer Aided Detection/Diagnosis S

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7

Wallgren, Frida-Maria, and Philip Andersson. "Board Gender Diversity and Firm Financial Performance : A Study of 100 Companies Listed on Nasdaq Stockholm." Thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Företagsekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-39464.

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Background: This thesis was written in context of the debate concerning gender equality and female representation on company boards. Gender quota legislation have been implemented by various countries on a national level, and a similar regulation was proposed by the European Commission. Legislation regarding board gender diversity have given rise to the discussion on the actual effects of female director’s on board effectiveness and firm financial performance. Purpose: The aim of the study is to evaluate the relationship between gender diversity on boards and firm

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8

Holman, Krista Elaine. "The effects of sewage effluent on macroalgal and seagrass abundance, dry weight and diversity within Grahams Harbor, San Salvador, Bahamas." Miami University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=miami1176261511.

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9

Gorgolione, Matteo. "Analyse et construction de codes LDPC non-binaires pour des canaux à évanouissement." Phd thesis, Université de Cergy Pontoise, 2012. http://tel.archives-ouvertes.fr/tel-00819415.

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Au cours des 15 dernières années, des progrès spectaculaires dans l'analyse et la conception des codes définis par des graphes bipartites et décodables par des algorithmes itératifs ont permis le développement de systèmes de correction d'erreurs, avec des performances de plus en plus proches la limite théorique de Shannon. Dans ce contexte, un rôle déterminant a été joué par la famille des codes à matrice de parité creuse, appelés codes LDPC (pour " Low-Density Parity-Check ", en anglais), introduit par Gallager au début des années 60 et décrits plus tard en termes de graphes bipartites. Négli

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10

Hoare, Armando. "Parametric, non-parametric and statistical modeling of stony coral reef data." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002470.

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11

Chan, Kwong Hang Kevin. "An Analysis of Wireless High-speed Data Services for Cellular CDMA Systems." Thesis, University of Waterloo, 2002. http://hdl.handle.net/10012/860.

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The interest in the development of wireless high-speed data services is in response to the strong market demand for high-speed wireless Internet access. Current standards aim at delivering a peak data rate greater than 2Mbps on the forward link. Since data services and voice services are fundamentally different, new concepts were introduced in the design of the forward data channel. In addition, methods of evaluating the performance of a cellular CDMA system have to be revisited. This thesis proposes a method which can be used to find the forward link peak and average data rates, throu

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12

Baldow, Christoph, Lars Thielecke, and Ingmar Glauche. "Model Based Analysis of Clonal Developments Allows for Early Detection of Monoclonal Conversion and Leukemia." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-221771.

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The availability of several methods to unambiguously mark individual cells has strongly fostered the understanding of clonal developments in hematopoiesis and other stem cell driven regenerative tissues. While cellular barcoding is the method of choice for experimental studies, patients that underwent gene therapy carry a unique insertional mark within the transplanted cells originating from the integration of the retroviral vector. Close monitoring of such patients allows accessing their clonal dynamics, however, the early detection of events that predict monoclonal conversion and potentially

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13

Baldow, Christoph, Lars Thielecke, and Ingmar Glauche. "Model Based Analysis of Clonal Developments Allows for Early Detection of Monoclonal Conversion and Leukemia." Public Library of Science, 2016. https://tud.qucosa.de/id/qucosa%3A30226.

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The availability of several methods to unambiguously mark individual cells has strongly fostered the understanding of clonal developments in hematopoiesis and other stem cell driven regenerative tissues. While cellular barcoding is the method of choice for experimental studies, patients that underwent gene therapy carry a unique insertional mark within the transplanted cells originating from the integration of the retroviral vector. Close monitoring of such patients allows accessing their clonal dynamics, however, the early detection of events that predict monoclonal conversion and potentially

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14

Bartozek, Elaine Cristina Rodrigues. "Efeitos do cultivo experimental de peixes em tanques-rede sobre a estrutura da comunidade fitoplanctônica em um braço do reservatório de Salto Caxias, região Sudoeste do Estado do Paraná." Universidade Estadual do Oeste do Parana, 2012. http://tede.unioeste.br:8080/tede/handle/tede/1982.

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Made available in DSpace on 2017-07-10T18:13:32Z (GMT). No. of bitstreams: 1 Elaine C Rodrigues Bartozek.pdf: 1985797 bytes, checksum: a358025d50258b7eaddead48b3a3dc40 (MD5) Previous issue date: 2012-06-11<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In Brazil, hydroelectric powerplant reservoirs are used for multiple purposes, among them, fish farming in net cages. The present study aimed to evaluate spacial and temporal variations of the abiotic variables, nutrients concentration, trophic state and composition and structure of the phytoplankton community in an arm of S

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15

Taylor, Gregory Watson. "An Ecological and Distributional Analysis of Great Basin Bristlecone Pine (Pinus longaeva)." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7540.

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Understanding the impacts of climate change is critical for improving the conservation and management of ecosystems worldwide. Ecosystems vary along a precipitation and temperature gradient, ranging from tropical jungles to arid deserts. The Great Basin is a semi-arid eco-region that is found within the western United States. Plant communities within the Great Basin range from sagebrush valleys to sub-alpine conifer forests found at high elevation areas. It is predicted that the Great Basin will experience prolonged periods of drought, more intense fires, and greater variability in average ann

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16

Rosing, Trina. "Using Structure-from-Motion Technology to Compare Coral Coverage on Restored vs. Unrestored Reefs." Wittenberg University Honors Theses / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wuhonors1623948204369104.

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17

Studeny, Angelika C. "Quantifying biodiversity trends in time and space." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3414.

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The global loss of biodiversity calls for robust large-scale diversity assessment. Biological diversity is a multi-faceted concept; defined as the “variety of life”, answering questions such as “How much is there?” or more precisely “Have we succeeded in reducing the rate of its decline?” is not straightforward. While various aspects of biodiversity give rise to numerous ways of quantification, we focus on temporal (and spatial) trends and their changes in species diversity. Traditional diversity indices summarise information contained in the species abundance distribution, i.e. each species'

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18

Selden, Justin D. "The Effect of Dredging on Fish Communities in Agricultural Streams in Crawford, Sandusky and Seneca Counties of Ohio." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1372421206.

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19

MELICHAR, Antonín. "Floristická studie vodních sinic a řas v jihovýchodní části kraje Vysočina." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-79717.

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The phytoplankton samples from 45 localities in Vysočina region were collected in 2009. Species composition and relative abundance of species were studied; ecological factors like pH, conductivity, temperature, water transparency and dissolved ions were measured. Ecological indices (Shannon and Simpson index of diversity) were calculated and compared with other ecological factors. Checklist of all species present in Vysočina region was made. There were found 262 species and 4 species new for the Czech Republic.

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20

Lin, Teng-Yi, and 林庭以. "The Bayes Estimation of Shannon's Index of Diversity." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/91533864066138183937.

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碩士<br>國立成功大學<br>統計學系碩博士班<br>94<br>Biodiversity is an extremely important topic of ecology research in recent years, because mankind arbitrarily destroyed habitat of animals and plants to cause the more serious ecological crisis. This paper is concerned with the estimation of Shannon’s index of diversity when the relative abundances have a prior distribution. The traditional estimator that ignores the missing species underestimates the Shannon’s index of diversity when there is a non-negligible number of unseen species. We provide a Bayesian approach based on a prior distribution. A simulation

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21

Ranjan, Ashish. "A NOVEL AND GENERIC METHOD FOR EXAMINING THE RELATIONSHIP BETWEEN ENERGY SECURITY AND DIVERSITY OF AN ENERGY SYSTEM." 2013. http://hdl.handle.net/10222/42671.

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In an energy system, diversity of supply—that is, reliance on a variety of mutually disparate energy suppliers and their energy supplies—is seen by many researchers and policymakers as an important component of energy security. This thesis describes a novel and generic method for examining the relationship between energy security (as represented by an energy-security index derived from a set of energy security indicators) and diversity (as defined by the Shannon-Wiener diversity index) of an energy system, its entities, and flows. While diversity is often presented by policy makers as being es

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22

von, Keitz Michael. "A Search for Maximal Diversity Amongst Paired Prisoner's Dilemma Strategies." Thesis, 2011. http://hdl.handle.net/10214/3210.

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Previous research has identified linear boundaries within a normalized unit square for specific paired strategies within the iterated prisoner's dilemma schema. In this work, general methods of capturing linear boundaries are developed and demonstrated on a wider variety of paired strategies. The method is also tested using an alternate scoring method. An application of Burnside's Lemma simplifies the number of neighbourhood configurations to be considered. In addition, Shannon entropy is used as a means of evaluating diversity of agents evolved with different payoff matrices, by which one m

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23

HAVEL, Jaroslav. "Zhodnocení přírodní hodnoty a ekosystémových služeb přírodě blízkých biotopů v intenzivně využívané zemědělské krajině." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-252429.

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My thesis is focused on valuation methods intensively used agricultural landscapes according to the importance of near-natural habitats in terms of their natural values and ecosystem services. This is done at four sites using pitfall traps, where there was a catch beetles (Carabidae). To evaluate the data I used indicators such as the Shannon index serenity. Procedures for calculating the ecological value of the area and the ecosystem services provided I processed according to the proposed method Seják et al., (2010). Rating I performed by BVM (,, habitat valuation methods "). Replacement cost

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24

Krämer, Inga. "Rainfall partitioning and soil water dynamics along a tree species diversity gradient in a deciduous old-growth forest in Central Germany." Doctoral thesis, 2009. http://hdl.handle.net/11858/00-1735-0000-0006-B692-C.

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25

Akhtar, Naveed. "Exploring patterns of phytodiversity, ethnobotany, plant geography and vegetation in the mountains of Miandam, Swat, Northern Pakistan." Doctoral thesis, 2014. http://hdl.handle.net/11858/00-1735-0000-0022-604D-8.

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Das Miandam-Untersuchungsgebiet (35° 1′- 5′ N, 72° 30′-37′ E) liegt in der Swat-Region der Provinz Khyber Pakhtunkhwa (ehemals North West Frontier Province) im nördlichen Pakistan. Die vorliegende Arbeit berücksichtigt sowohl ethnobotanische und pflanzensoziologische Aspekte als auch die Pflanzenartendiversität innerhalb des Gebietes. Aufgrund der hohen Habitatvielfalt weist das Miandam-Gebiet einen großen Reichtum von Medizinalpflanzen auf. Die im Rahmen der Arbeit durchgeführte ethnobotanische Studie dokumentiert das Vorkommen der Medizinalpflanzen sowie deren Nutzung in der Region. Weiterh

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26

Chapungu, Lazarus. "Impact of climate change on vegetative species diversity in Masvingo Province, Zimbabwe." Thesis, 2017. http://hdl.handle.net/10500/23781.

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Vegetative species diversity is under threat from environmental pressures, particularly climate change. As the impacts of climate change vary from place to place, response of vegetative species diversity to a changing climate also vary depending on geographical location. The response of vegetative species diversity under dry conditions in Zimbabwe is not well known. This study assessed the impact of climate change on vegetative species diversity under semiarid conditions of Masvingo province in Zimbabwe. This was achieved by determining climate change trends over a period of forty years

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