Teses / dissertações sobre o tema "Periodicals and serials"
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1
Jenkins-Todd, Derone I. (Derone Ilene). "Determination of Author Characteristics and Content of Educational Computing Articles in Community/Junior College Serials Literature, 1977-1991". Thesis, University of North Texas, 1993. https://digital.library.unt.edu/ark:/67531/metadc278735/.
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The study was undertaken: (a) to categorize the contents of educational computing articles using a taxonomy developed by Knezek, Rachlin, and Scannell (1988), (b) to examine the trends in educational computing subject matter addressed in community/junior college journals between 1977 and 1991, and (c) to identify and analyze specific characteristics of contributing authors and their employing institutions which might explain writing and publication biases.
2
Richardson, Paul Alexander. "Serial struggles : English Catholics and their periodicals,1648-1844". Thesis, Durham University, 2003. http://etheses.dur.ac.uk/1082/.
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From the mid-seventeenth century to the mid-nineteenth century, the English Catholic community showed its robustness, resilience and complexity through its own periodical press. The subject, however, has been relatively neglected, specialist research amounts only to a bare handful of studies, and a full and definitive study which exploits the wealth of available materials has not yet been written. This thesis is therefore intended to present what has long been overdue, the first full chronological account of the foundation and development of the English Catholic periodical press from the Mercurius Catholicus to the Dublin Review. The work also serves specifically as a balance to Susan J. Acheson who argued in 1981, in her Oxford M.Litt. thesis on Victorian Catholic journalism, that the Emancipation Act of 1829 was the single most important influence on the Catholic periodical press in England. Against Acheson, my study shows that the Catholic periodical press did not owe its life to one major event early in the nineteenth century, but was rather the result of the religio-political activity which accompanied a long and difficult struggle for relief measures begun nearly two hundred years before. In describing the attempts by Catholics, often in difficult conditions and hostile circumstances, to develop a regular literary means of representing , and defending themselves, my thesis does not avoid the fact that the periodicals were often sustained and made exciting by internecine quarrels and struggles. Indeed, it concentrates on the tension between two groups of Catholics, about whether to stress division from or similarity with a Protestant state and society, which marked the early history of the English Catholic periodical press, and concludes that the final victory belonged to the party which emphasised distinctiveness over eirenicism.
3
Turner, Mark Wayne. "Gendered issues : Anthony Trollope and the periodical press in the 1860s". Thesis, Birkbeck (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309533.
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4
Feliciano, Ana Marta das Neves Santos. "Habitação e utopia nos anos sessenta-as propostas do Grupo Archigram no contexto de uma década de rupturas". Master's thesis, Instituições portuguesas -- UTL-Universidade Técnica de Lisboa -- -Faculdade de Arquitectura, 2001. http://dited.bn.pt:80/29399.
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5
Klinka, Karel. "Scientia silvica extension series". Forest Sciences Department, University of British Columbia, 2001. http://hdl.handle.net/2429/712.
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Scientia Silvica extension series was started in 1997 by Karel Klinka, a silvics professor at the University of British Columbia. He saw the need for a friendly way of distributing current research results to the forestry community. Each extension pamphlet represents a 2-4 page summary of research findings in the field of forest ecology. Topics range from humus form and ecosystem classification to forest productivity, regeneration, stand structure, soil nutrient regimes, coarse woody debris, and plant diversity. Included in each summary is a reference to the more technical original report or scientific paper and contact information for those who wish further information. Also included in the series are several full colour comprehensive reports on ecosystem classification. All pamphlets and reports are in Adobe Acrobat (PDF) format for on-screen viewing or printing. Forest Renewal British Columbia provided the funding for this version of Scientia Silvica extension series.
6
DUCA, VICTOR EDUARDO LEITE DE A. "A NEW APPROACH TO GENERATE TIME SERIES PERIODICAL SCENARIOS VIA NON-LINEAR MODELS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33375@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
PROGRAMA DE EXCELENCIA ACADEMICA
Os modelos autorregressivos são comumente encontrados dentro do contexto de séries hidrológicas, especificamente em séries de vazões e/ou ENA (Energia Natural Afluente). Muitos destes modelos são de ordem 1, possuem parâmetros constantes ou periódicos e necessitam do requisito de normalidade. Segundo a literatura, séries de vazões anuais podem ser aproximadas para distribuições normais, porém em períodos de tempo curtos como diário, semanal e mensal esta característica não é observada, especialmente pelo problema de assimetria. Devido a isto, uma nova classe de modelo de ordem 1 foi estudada na tentativa de suprir tal problema. O novo modelo mantém estrutura autorregressiva, pode ser aditivo, multiplicativo ou híbrido, onde incorpora propriedades aditivas e multiplicativas conjunta- mente, porém suas marginais assumirão distribuição gama. Além disso, a modelagem parte do pressuposto que os Métodos de Momentos são eficientes para estimação de seus parâmetros. Recentemente esta abordagem, sob a forma híbrida, não demonstrou sucesso para o contexto do despacho hidrotérmico brasileiro. O presente trabalho foca na análise completa do modelo híbrido para as séries do Setor Elétrico Brasileiro, trazendo como novidade a estimação via máxima verossimilhança além dos estudos isolados de modelos aditivos e multiplicativos. Os resultados revelaram uma linha de pesquisa promissora, abrindo um campo de possibilidades para que novas ordens superiores a primeira ou distribuições assimétricas possam ser estudadas partindo deste princípio.
Autoregressive models are commonly found in the context of hydrological series, specifically in streamflow and/or ANE series (Affluent Natural Energy). Most of them are models of order 1, which have constant or periodic parameters and need the requirement of normality. According to the literature, annual streamflow series can be approximated for normal distributions, however, in short periods of time, like daily, weekly and monthly, this feature is not observed, especially because of the asymmetry issue. Due to this reason, a new class of model of order 1 was studied for attempting to solve such problem. The new model keeps autoregressive structure and can be additive, multiplicative or hybrid, in which embodies additive and multiplicative properties together, but its marginals will assume gamma distribution. Moreover, this modeling departs from the presupposition that Methods of Moments are efficient to the estimation of its parameters. Recently, this approach, under the hybrid way, has not proved to be successful to the context of Brazilian hydrothermal dispatch. This work focuses on the complete analysis of hybrid model to the series of the Brazilian Electric Sector, bringing, as novelty, Maximum Likelihood Estimation, besides isolated studies of additive and multiplicative models. The results revealed a prosperous line of research, opening a field of possibilities for new orders or asymmetric distributions to be studied starting from this point.
7
Lan, Yang. "Computational Approaches for Time Series Analysis and Prediction. Data-Driven Methods for Pseudo-Periodical Sequences". Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4317.
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Time series data mining is one branch of data mining. Time series analysis and prediction have always played an important role in human activities and natural sciences. A Pseudo-Periodical time series has a complex structure, with fluctuations and frequencies of the times series changing over time. Currently, Pseudo-Periodicity of time series brings new properties and challenges to time series analysis and prediction. This thesis proposes two original computational approaches for time series analysis and prediction: Moving Average of nth-order Difference (MANoD) and Series Features Extraction (SFE). Based on data-driven methods, the two original approaches open new insights in time series analysis and prediction contributing with new feature detection techniques. The proposed algorithms can reveal hidden patterns based on the characteristics of time series, and they can be applied for predicting forthcoming events. This thesis also presents the evaluation results of proposed algorithms on various pseudo-periodical time series, and compares the predicting results with classical time series prediction methods. The results of the original approaches applied to real world and synthetic time series are very good and show that the contributions open promising research directions.
8
Lewis, Arthur M. "Seasonal Hidden Markov Models for Stochastic Time Series with Periodically Varying Characteristics". PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/5056.
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Novel seasonal hidden Markov models (SHMMs) for stochastic time series with periodically varying characteristics are developed. Nonlinear interactions among SHMM parameters prevent the use of the forward-backward algorithms which are usually used to fit hidden Markov models to a data sequence. Instead, Powell's direction set method for optimizing a function is repeatedly applied to adjust SHMM parameters to fit a data sequence. SHMMs are applied to a set of meteorological data consisting of 9 years of daily rain gauge readings from four sites. The fitted models capture both the annual patterns and the short term persistence of rainfall patterns across the four sites.
9
Lawrence, Lindsy M. "Seriality and domesticity the Victorian serial and domestic ideology in the family literary magazine /". Fort Worth, Tex. : Texas Christian University, 2008. http://etd.tcu.edu/etdfiles/available/etd-05052008-151851/unrestricted/Lawrence.pdf.
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Nunes, Paulo Manuel Simões. "A construção moderna e a cultura arquitectónica no início do novecentos em Portugal". Master's thesis, Instituições portuguesas -- UL-Universidade de Lisboa -- -Faculdade de Belas Artes, 2000. http://dited.bn.pt:80/29366.
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1º Vol.: 242 f. ; 2º Vol.: Anexos . - 186 f., [115] f. il.O 2º volume apenas existe em formato papel. Poderá ser consultado na Biblioteca da FBAUL - Cota: TES 11 (1)
It is the aim of the present work to study the published articles in the A Construção Moderna, the first Portuguese magazine, edited from the year 1900 to 1919, dedicated both to architecture and to building in general. In such an important period of time for the Portuguese history and culture, as the turning of the century was, this pioneer experience introduced the ideias, the concepts and the materials that sustained the architectural thought and production in the beginning of the modernism in Portugal. In the turn of the 19th to the 20th century, Portugal was an undeveloped country. With its fragile economy and an almost non-existent industry, no wonder that the urban development and the consequent architectural languages appeared rather late in this country. In a cultural atmosphere still very much influenced by the 19th romanticism, the characters of such trend, were mainly the educated people seduced by the positivist doctrine and by the realistic aesthetics. So the modernism question is introduced in Portugal through two different ways of both artistic and cultural influences: on the one hand the French context, through the Academy (where the national architects took their training), the racionalism, the beaux-arts references and the cosmopolitan «Haussmann city»; on the other hand, the 19th English scenery, through the Arts and Crafts, the gothic revival and the cultural tradicionalism. These educated men of the last decade of the 19th century got their inspiration in these two sources. They were engaged in the rebirth of the values of the national identity and in defending the traditional culture, the picturesque and the folklore, trying to define a national example of architecture. The magazine A Construção Moderna appeared under these circumstances through the will and effort of these three men: Nunes Colares, typographer and the project guide; Melo de Matos, engineer and skilful mathematician; and Rosendo Carvalheira, architect with a certain romantic spirit and extremely dedicated to the national cause.Throughout their careers, they fixed the great topics of the architectural culture of this period: the social and cultural importance of the architects; the art critics; the ‘Portuguese house’ model; the restore politics; the urban development; the ‘cheap houses’; the Portuguese ‘style’; and the introduction of the new technologies and new building materials in the civil construction, among many other problematics
11
Nunes, Paulo Manuel Simões. "A construção moderna e a cultura arquitectónica no início do Novecentos em Portugal". Master's thesis, Instituições portuguesas -- UL-Universidade de Lisboa -- -Faculdade de Belas Artes, 2000. http://hdl.handle.net/10451/15784.
Texto completo da fonteResumo:
1º Vol.: 242 f. ; 2º Vol.: Anexos . - 186 f., [115] f. il.O 2º volume apenas existe em formato papel. Poderá ser consultado na Biblioteca da FBAUL - Cota: TES 11 (1)
It is the aim of the present work to study the published articles in the A Construção Moderna, the first Portuguese magazine, edited from the year 1900 to 1919, dedicated both to architecture and to building in general. In such an important period of time for the Portuguese history and culture, as the turning of the century was, this pioneer experience introduced the ideias, the concepts and the materials that sustained the architectural thought and production in the beginning of the modernism in Portugal. In the turn of the 19th to the 20th century, Portugal was an undeveloped country. With its fragile economy and an almost non-existent industry, no wonder that the urban development and the consequent architectural languages appeared rather late in this country. In a cultural atmosphere still very much influenced by the 19th romanticism, the characters of such trend, were mainly the educated people seduced by the positivist doctrine and by the realistic aesthetics. So the modernism question is introduced in Portugal through two different ways of both artistic and cultural influences: on the one hand the French context, through the Academy (where the national architects took their training), the racionalism, the beaux-arts references and the cosmopolitan «Haussmann city»; on the other hand, the 19th English scenery, through the Arts and Crafts, the gothic revival and the cultural tradicionalism. These educated men of the last decade of the 19th century got their inspiration in these two sources. They were engaged in the rebirth of the values of the national identity and in defending the traditional culture, the picturesque and the folklore, trying to define a national example of architecture. The magazine A Construção Moderna appeared under these circumstances through the will and effort of these three men: Nunes Colares, typographer and the project guide; Melo de Matos, engineer and skilful mathematician; and Rosendo Carvalheira, architect with a certain romantic spirit and extremely dedicated to the national cause.Throughout their careers, they fixed the great topics of the architectural culture of this period: the social and cultural importance of the architects; the art critics; the ‘Portuguese house’ model; the restore politics; the urban development; the ‘cheap houses’; the Portuguese ‘style’; and the introduction of the new technologies and new building materials in the civil construction, among many other problematics
12
Gimenez, Priscila Renata. "Feuilletons dramatiques et transferts culturels franco-brésiliens au XIXe siècle : enjeux d'une édition de la "Semaine Lyrique" de Martins Pena". Thesis, Montpellier 3, 2014. http://www.theses.fr/2014MON30003/document.
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Dans le cadre des études sur presse et littérature et sur les transferts culturels, cette recherche présente une étude comparative entre les feuilletons dramatiques français, d'Hector Berlioz et de Théophile Gautier, et les feuilletons de théâtre lyrique écrits par le dramaturge brésilien Martins Pena. Il a écrit la série « Semaine Lyrique », parue au Jornal do Commercio en 1846-1847. Sous une perspective diachronique qui prend en compte le processus de mondialisation médiatique de la presse périodique au XIXe siècle, cet examen se propose de retracer et d'observer les transferts de pratiques culturelles médiatiques de la presse française vers la brésilienne qui ont déterminé l’acclimatation des feuilletons dramatiques au Brésil. En privilégiant l'analyse de la méthode, de la construction du discours critique et du style des feuilletonistes français et de Martins Pena, nous avons centré notre étude sur les aspects littéraires ainsi que sur la répercussion de leur adaptation dans la presse brésilienne. Particulièrement, les formes et la manifestation de l'ironie (journalistique) dans l'écriture des feuilletonistes constituent le cerne des analyses. Notre hypothèse est que Martins Pena a adapté les aspects de l'écriture littéraire des critiques français en créant une poétique autonome et légitime. En plus d’être la première série de chroniques de contenu culturel de la presse quotidienne de Rio de Janeiro, la « Semaine Lyrique » se distingue aussi des feuilletons dramatiques brésiliens précédents grâce à l'écriture ironique et fictionnelle assimilée et recrée au fil de la série par Martins PenaIn the perspective of researches about literature and press theory and about cultural transfers, this study presents a comparative analysis between Hector Berlioz’ and Théophile Gautier's theater serials and Brazilian dramatic writer Martins Pena’s serials about lyric theater wrote by the Brazilian dramatic writer Martins Pena. He wrote the series “Lyric Week” published in Jornal do Commercio in 1846-1847. In a diachronic perspective which consider the process of periodical press globalization in the 19th century, this investigation proposes to reconstruct and observe the transfers of media cultural practices from the French press to the Brazilian press which determined the acclimatization of the theater serials in Brazil. Emphasizing the method analysis, the construction of critical discourse and style of French theater serials and that of Martins Pena, we focused our study on the literary aspects as well as on the impact their adaptation had in the Brazilian press. Specifically, the form and manifestation of the (journalistic) irony in the writing of the columnists constitute the focus of the analysis. Our hypothesis is that Martins Pena adapted aspects of the French columnists’ literary writing, creating an autonomous and legitimate poetic. In addition to being the first cultural content chronicle series of the daily press of Rio de Janeiro, the “ Lyric Week” distinguishes itself from previous Brazilian theater serials through the ironic and fictional writing assimilated and recreated throughout the series by Martins Pena
13
Souza, Raquel dos Santos Madanêlo. "Convergências e divergências: revistas literárias em perspectiva". Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/8/8156/tde-18092008-160545/.
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A Águia foi um órgão da \"Renascença Portuguesa\" e sua segunda série esteve, pelo menos em seus primeiros anos, orientada pelo Saudosismo - doutrina capitaneada pelo poeta Teixeira de Pascoaes. A partir dessa revista surgiram inúmeros outros periódicos, dentre os quais destacamos a Seara Nova e Terra de Sol. O objetivo dessa pesquisa foi, tendo a 2a série de A Águia como matriz, pensar e comparar essas três publicações. Ao verificar as convergências e divergências entre elas, pudemos compreender várias questões referentes às relações entre Portugal-Brasil nas primeiras décadas do século 20: os conceitos de \"nação\" incorporados aos discursos desses objetos de análise; a idéia de \"engajamento\" entre os intelectuais envolvidos nas revistas e as possíveis relações entre o modernismo brasileiro e o modernismo português.A Águia was the mouthpiece of the \"Renascença Portuguesa\" and this journal´s second series was, at least in its first years, heavily influenced by Saudosismo, a tendency whose leader was Teixeira de Pascoaes. A Águia was the starting point for several other important periodicals, among them Seara Nova and Terra de Sol. This research focuses on the second series of A Águia and compares this important journal with Seara Nova and Terra de Sol. Identifying the similarities and differences in these three periodicals, we were able to probe into several issues concerning the relationship between Brazil and Portugal in the first decades of the 20th century: the concepts of nation imbedded in the discourses found in these periodicals; the idea of engagement among the intellectuals involved in these projects; and the relationship between Brazilian and Portuguese modernismos.
14
Arizona, Associated Students of the University of. "1986 Desert, University of Arizona Yearbook". University of Arizona, 1986. http://hdl.handle.net/10150/231954.
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The University of Arizona Yearbook is an annual publication that documents student activities, and campus life. The yearbook contains photographs and information about the university including: homecoming, graduating class, athletic events, student organizations and faculty.
15
Arizona, Associated Students of the University of. "1994 Desert, University of Arizona Yearbook". University of Arizona, 1994. http://hdl.handle.net/10150/231992.
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The University of Arizona Yearbook is an annual publication that documents student activities, and campus life. The yearbook contains photographs and information about the university including: homecoming, graduating class, athletic events, student organizations and faculty.
16
Self, Sharon Williams. "A quasi-experimental study of student use of periodicals for independent research projects in high school libraries". 1990. http://books.google.com/books?id=c-fgAAAAMAAJ.
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Afzali, Mehdi. "Elektronik Bilgi Kaynaklarının Üniversite Kütüphanelerine Ekonomik Etkisi : İran Temel Bilimler İleri Araştırmalar Enstitüsü Örneği". Thesis, 2003. http://eprints.rclis.org/7533/1/ELEKTRON%C4%B0K_B%C4%B0LG%C4%B0_KAYNAKLARININ_%C3%9CN%C4%B0VERS%C4%B0TE_K%C3%9CT%C3%9CPHANELER%C4%B0NE_EKONOM%C4%B0K_ETK%C4%B0S%C4%B0.pdf.
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Collection development in university libraries is affected by a number of factors. The increase in the amount of information, technological developments, price hikes and electronic publishing are among them. In addition, university libraries are faced with the growth of collections and diversity of services.Iranian Institute of Advanced Studies in Basic Sciences (IASBS) Library (Ketabhaneye Merkeze Tehsiyate Tekmili der Olume Paye) is faced with a serious budget and space problem. The number of journals that the Library subscribes to decreases each year due to ever-increasing journal subscription prices and the Library’s constant budget shortages. Binding, cataloging, storage of and access to those journals constitutes the most important problem of the Library.The objective of this study is to answer the following conjecture: If IASBS Library subscribed to the electronic versions of journals instead of their printed copies, its budget and space problems would be eased. The hypothesis is that “If IASBS Library subscribed to the electronic versions of journals in the year 2002, its total expenditures would be decreased.” To prove this hypothesis, we compared various expenditure(subscriptions, mailing, control, binding and archiving) of both printed and electronic versions of journals that IASBS Library subscribed to in 2002.Findings obtained proved our hypothesis. If IASBS Library subscribed to the electronic versions of journals instead of their printed equivalents, the Library would have decreased its total expenditures approximately $57.000. This figure translates to almost 13% economy in the Library’s overall material acquisition budget. In addition, instead of 155 journals, IASBS Library would have obtained access to a total of 2260 electronic journal by paying less.In conclusion, IASBS Library should provide access to electronic versions of journals as soon as possible in order to solve its budget and space problems.
18
Lara, Pacheco Gonzalo Clemente. "Los fanzines como un recurso bibliográfico". Thesis, 2000. http://eprints.rclis.org/6935/1/tesinaUP.pdf.
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This undergraduate degree thesis (The Fanzines as a Bibliographic Resource) presents definitions, features and profiles of frequent contents of marginated and independent periodicals known as fanzines. Along the analysis of this work, it is argued in favour to consider these information sources as bibliographic resources up to the same level of the well known periodicals of the library scene.
19
Burkertová, Zuzana. "Zpracování periodik v ČR a v zahraničí, vývoj směrem k RDA pravidlům". Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-384190.
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The aim of this work is to evaluate the current procedures and to indicate the development of the cataloging practice towards the RDA rules based on research and analysis of bibliographic production serials in selected Czech and foreign libraries. The diploma thesis is divided into several chapters. After introducing the issue of serial documents follows the chapter devoted to the standards and resources for cataloging the continuing resources that the catalogers should know. The next chapter deals with the FRBR and its application to the serials. Part of the chapter dealing with RDA rules from the serials perspective is also the analysis of these rules according to the FRBR structure available in the RDA Toolkit. Three chapters are devoted to the analysis of bibliographic processing, first in foreign libraries, then in Czech libraries, and in the last chapter there is a comparison of selected periodicals in foreign and Czech libraries. At the end of the thesis are presented the impacts of application of the FRBR model and RDA rules on serials cataloging. Keywords serials - periodicals - continuing resources - rules RDA - FRBR - FRBRoo - PRESSoo - cataloging - bibliographic record - library
20
Agyepong, Kwadwo. "Comparative Performance Analysis of the Algorithms for Detecting Periodically Expressed Genes". Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-10815.
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Thus far, a plethora of analysis on genome-wide gene expression microarray experiments on the cell cycle have been reported. Time series data from these experiments include gene expression profiles that might be periodically expressed. However, the numbers and actual genes that are periodically expressed have not been reported with consistency, analysis on similar experiments reports disparate numbers of genes that are periodically expressed with scant overlap. This work ultimately compares the performance of five spectral estimation schemes in their ability to recover periodically expressed genes profiles. Lomb-Scargle (LS), Capon, Missing-Data Amplitude and Phase Estimation (MAPES), Real Value Iterative Adaptive Approach (RIAA) and Lomb-Scargle Periodogram Regression (LSPR) are rigorously studied and pitted against each other in various simulated testing conditions. Results obtained using synthetic and microarray data reveals that RIAA is an efficient and robust method for the detection of periodically expressed genes in short time series data that might be characterized with noisy and irregularly sampled data points.
21
Das, Soumya. "Stationary and Cyclostationary Processes for Time Series and Spatio-Temporal Data". Diss., 2021. http://hdl.handle.net/10754/670097.
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Due essentially to the di culties associated with obtaining explicit forms of stationary
marginal distributions of non-linear stationary processes, appropriate characterizations
of such processes are worked upon little. After discussing an elaborate
motivation behind this thesis and presenting preliminaries in Chapter 1, we characterize,
in Chapter 2, the stationary marginal distributions of certain non-linear
multivariate stationary processes. To do so, we show that the stationary marginal
distributions of these processes belong to speci c skew-distribution families, and for
a given skew-distribution from the corresponding family, a process, with stationary
marginal distribution identical to that given skew-distribution, can be found.
While conventional time series analysis greatly depends on the assumption of
stationarity, measurements taken from many physical systems, which consist of both
periodicity and randomness, often exhibit cyclostationarity (i.e., a periodic structure
in their rst- and second-order moments). Identifying the hourly global horizontal
irradiances (GHIs), collected at a solar monitoring station of Saudi Arabia, as a
cyclostationary process and considering the signi cant impact of that on the energy
production in Saudi Arabia, Chapter 3 provides a temporal model of GHIs. Chapter 4
extends the analysis to a spatio-temporal cyclostationary modeling of 45 di erent
solar monitoring stations of the Kingdom. Both the proposed models are shown to
produce better forecasts, more realistic simulations, and reliable photovoltaic power
estimates in comparison to a classical model that fails to recognize the GHI data as
cyclostationary. Chapter 5 extends the notion of cyclostationarity to a novel and
exible class
of processes, coined evolving period and amplitude cyclostationary (EPACS) processes,
that allows periods and amplitudes of the mean and covariance functions to
evolve and, therefore, accommodates a much larger class of processes than the cyclostationary
processes. Thereafter, we investigate its properties, provide methodologies
for statistical inference, and illustrate the presented methods using a simulation study
and a real data example, from the heavens, of the magnitudes of the light emitted
from the variable star R Hydrae.
Finally, Chapter 6 summarizes the ndings of the thesis and discusses its signi -
cance and possible future extensions.
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Almeida, Cesário Paulo Lameiras de. "Influência do período de inspecção nos custos de funcionamento de um sistema. Aplicação ao caso de componebtes com tempo de vida exponencial". Master's thesis, 1997. http://hdl.handle.net/10400.5/15162.
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Mestrado em Economia Aplicada à Economia e à GestãoNeste trabalho, pretende-se analisar o Custo Total Médio de funcionamento e sistemas sujeitos a políticas periódicas de inspecção a partir de conceitos da Teoria da Fiabilidade. Sendo assim, consideram-se sistemas de complexidade variável constituídos por um ou mais componentes montados em série e em paralelo com tempos de vida exponencial, cujas falhas são apenas detectáveis por inspecções. Com base nestes pressupostos e recorrendo a tratamento analítico e estatístico adequado, obtêm-se algumas soluções para o cálculo do período de inspecção que minimiza o Custo Total Médio por ciclo de funcionamento do respectivo sistema. Estuda-se, em especial, a precisão das aproximações obtidas concluindo-se que algumas delas podem ser consideradas quase óptimas. São ainda analisadas e comparadas, para diferentes valores do custo de inspecção, algumas grandezas relativas à fiabilidade do sistema e, muito em particular, ao Custo Total Médio Mínimo por ciclo associado a cada uma das várias aproximações, obtendo-se conclusões interessantes.
This work aims at the analysis of the Average Total Cost of working systems subject to periodical politics of inspection based on concepts of the Reliability Theory. Thus, it considers systems of varying complexity mode up of one or more components assembled in series and in para/lei with exponential lifetime, whose flaws are only detectable through inspection. Based on these premises and making use of adequate analytical and statistical procedures, it arrives at some solutions to the calculation of the inspection period which minimizes the Average Total Cost per working cycle of the respective system. It specially examines the accuracy of the obtained approximations, concluding that some ca be considered almost optimum. It also analyses and compares, for different va/ues of the inspection cost, some quantities re/pted to the reliability of the system and in particular to the Minimum Average Total Cost per cycle associated to each of the severa/ approximations, resulting in interesting conclusions.
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