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Dissertations / Theses on the topic 'Matn modeli'

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Published: 7 June 2025

Last updated: 16 July 2025

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1

Nilsson, Anna, and Michelle Hansen. "Singaporemodellen The Singapore model : – en modell förundervisning i matematik – a model for teaching mathematics." Thesis, Malmö universitet, Malmö högskola, Institutionen för materialvetenskap och tillämpad matematik (MTM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-42040.

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Syftet med denna kunskapsöversikt är att undersöka vad Singaporemodellen innebär och vadsom är karakteristiskt för modellen. För att vi skulle kunna göra en kunskapsöversikt valde viatt fördjupa oss i Singapores matematikhistoria och vad som karakteriserar modellen. Eftersomdet i Sverige saknas relevant forskning om Singaporemodellen var det aktuellt för oss att se hurandra länder har gjort och med hjälp av det skapa en bild av vad modellen kan ha för betydelsei den svenska skolan.Vår digitala bakgrundsundersökning i sökmotorerna ERIC via Ebsco och GoogleScholar, resulterade i en variation av vetenskapliga artiklar som vi valde ut för att jämföra ochanalyseras. Resultatet av våra vetenskapliga artiklar gav en förståelse för hur Singaporesutbildningssystem i matematik är uppbyggt och hur man ständigt håller en hög standard på sinutbildning. Forskningsresultaten från andra länders implementering av Singapores matematikhar gett framgångsrika effekter.Påföljden av de vetenskapliga artiklarna har resulterat i att Singaporemodellen och desssärskilda struktur bidrar till ökade kunskaper i matematik för elever och hade varit till fördelför lärare i Sverige att ta efter.

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2

Monaro, Érica de Lemos Ferreira. "Inibição da formação de produtos da reação de Maillard por extrato de erva-mate (Ilex paraguariensis) em sistemas modelo alimento." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/6/6138/tde-13072012-164014/.

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INTRODUÇÃO: A reação de Maillard ocorre em alimentos termicamente processados e também em sistemas biológicos, em que é chamada de glicação. Esta reação ocorre entre grupos carbonilas e grupamentos aminas e tem especial importância em alimentos, pois promovem alterações sensoriais importantes ao sabor, aroma, aparência e textura. Em sistemas biológicos, entretanto, podem acarretar mudanças em estruturas moleculares que favorecem o estresse oxidativo e participam da patogenia de complicações micro e macro vasculares características da diabetes, aterosclerose e doenças neurodegenativas. Os compostos carbonílicos ou produtos da reação de Maillard (PRMs) formados em alimentos contribuem para o aumento do pool endógeno de compostos carbonílicos. A utilização de substâncias ou alimentos que possam minimizar a formação destes compostos pode constituir-se em uma estratégia para minimizar a sua ingestão. OBJETIVO: Avaliar o efeito da adição de extrato etanólico de erva-mate verde na inibição da reação de Maillard em sistemas modelo alimento. METODOLOGIA: Foram elaborados modelos de biscoito e lácteos com e sem lipídios. Os teores de produtos da reação de Maillard [furosina (FUR), hidroximetilfurfural (HMF), carboximetilisina (CML) e produtos fluorescentes (IF)] foram avaliados. O extrato etanólico foi obtido por extração contínua a quente da erva-mate verde seca e caracterizado quanto aos teores de compostos fenólicos, cafeína e saponinas por cromatografia líquida. A intensidade de fluorescência dos sistemas foi avaliada por espectrofotometria, os teores de FUR e HMF foram analisados por cromatografia líquida de alta eficiência e de CML por ELISA. RESULTADOS: O extrato etanólico de erva-mate apresentou 155µg mg -1 de fenólicos totais, 76µg mg -1 de cafeína, 5µg mg de ácido ursólico e 3µg mg -1 de ácido oleanóico. A formação de HMF, FUR e IF nos sistemas modelo de biscoito não foi influenciada pela adição do extrato de erva-mate. O teor de CML do modelo com extrato do sistema de biscoito foi significativamente menor (p<0,05) em que os outros tratamentos com aquecimento, a porcentagem de inibição foi de 8%. A formação dos IF nos sistemas modelos lácteos adicionados de extrato foram significativamente menores (p<0,05) comparado aos modelos lácteos com aquecimento sem adição de extrato, a porcentagem de inibição foi de 30% para o modelo sem lipídeos e de 27% para o modelo com lipídeos. CONCLUSÃO: A adição do extrato etanólico da erva-mate verde foi efetiva em diminuir a reação de Maillard nos modelos de biscoito e lácteos.<br>INTRODUCTION: the Maillard reaction (MR) occurs in processed foods during heating, processing and storage and in biological systems, where it is called glycation. The MR is initiated by the condensation of amino groups of proteins with the carbonyl group of reducing sugars and has special importance in foods, because they promote sensory changes important to the flavor, aroma, color and texture. In biological systems, this reaction are involved in the progression of several diseases, such as diabetes, cardiovascular complications and neurodegenerative diseases. The Maillard reaction products contribute to increase the endogenous pool of carbonyl compounds. The use of substances or foods that can minimize the formation of these compounds may constitute a strategy to minimize your intake. OBJECTIVES: evaluate the effect of addition of the ethanolic extract of yerba mate in inhibition of the Maillard reaction in model food systems. METHODS: were developed cookies and milk models food systems. The content of Maillard reaction products [Furosine (FUR), hydroxymethylfurfural (HMF), carboxymethyllysine (CML) and fluorescent compounds (IF)] were evaluated. The yerba mate extract was obtained by hot continuous extraction and characterized for the levels of phenolic compounds and saponins by liquid chromatography. The contents of the fluorescent compounds (IF) was measured by spectrophotometric method, HMF and FUR were analyzed by high performance liquid chromatography and the levels of CML by ELISA. RESULTS: The yerba mate extract contained 155g mg -1 of total phenolics, 76g mg -1 of caffeine, 5g mg of ursolic acid and 3g mg -1 of oleanolic acid. The formation of HMF, FUR and IF in cookie systems was not influenced by the addition of the yerba mate extract. The CML content of the cookie model with yerba mate extract was significantly lower (p<0.05) than the other treatments with heating. The IF milk models added extract were significantly lower (p <0.05) than the IF milk models with heating without extract. CONCLUSION: The yerba mate extract reduced the formation of CML in the cookie system and inhibit the Maillard reaction in the intermediate stage in milk systems.

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3

Pak, Hee Chul. "Two distributed capacitance models /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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4

Aguirre, Roldán Nicolás Fabricio, Torres Christian Andres Flores, Paz Stefano Noah Mittrany, Vera Erika Frida Peralta, and Hermitaño Valeria Alissa Rubianes. "Desarrollo de proyecto de negocio Coffee Mate." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/656896.

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El presente trabajo de investigación tiene como finalidad el desarrollo y proyección de un plan de negocio, en el que se ha creado la marca “Coffee Mate” con el objetivo de brindar café orgánico peruano con distintos sabores proveniente de la región de Junín mediante una suscripción mensual, la marca contará con el apoyo social a los distintos agricultores mediante la compra de los insumos bajo el precio establecido por el mercado generando un comercio justo para ellos. Mediante el uso de entrevistas como herramienta de validación se logra determinar que el producto responde a las necesidades de un nicho que no puede conseguir café orgánico de calidad de manera sencilla. Además, se desarrolla cada cuadrante del Business Model Canvas empleando distintas herramientas de investigación. Como ventaja competitiva Coffee Mate dispone de muchos sabores de café artesanales que no se puede encontrar de forma regular, además de brindarle la satisfacción al cliente de apoyar a los agricultores que son afectados por la reducción injusta de precios. También, se brinda una experiencia única y personalizada mediante la página web de la marca, cabe recalcar que también se dispone de otros productos complementarios como cafeteras y tazas. Por último, el trabajo presentará las proyecciones de ventas para los 3 años de duración del proyecto, junto a su respectivo flujo de caja en la que se detalla el financiamiento del plan de negocio con la finalidad de mostrar a detalle el crecimiento y los gastos que se incurrirá.<br>Our research job is about the development and the projection of our business plan, in which we created the brand “Coffee Mate” with the objective to offer organic Peruvian coffee with different flavors from the region of Junin through monthly subscription, the brand will have social support to different farmers through buying all the supplies at market price generating a fair trade for them. Using interviews as a tool to validate, it is possible to determinate that our product responds at the needs of a niche that cannot buy a good organic coffee in a simple way. Moreover, we develop each quadrant of the Business Model Canvas using different investigation tools. Our competitive advantage Coffee Mate has a lot of different flavors that cannot be find on a regular way, besides of providing the satisfaction to the customer of helping the farmers that are affected for the unfair low prices. In addition, it provides a unique and personal experience through the website of the brand, it is worth say that the store also contains other complementary products such as coffee makers and cups. Lastly, the research job will present the sales projections for the three years of duration of the project, with its own cash flow in which it details all the financing that the project requires to detail the evolution and the expenses of the project.<br>Trabajo de investigación

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5

Singh, Rahul. "Models for integrated product family development /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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6

Trefler, Richard Jay. "Expressive and efficient model checking /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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7

Robby. "Domain-specific software model checking /." Search for this dissertation online, 2004. http://wwwlib.umi.com/cr/ksu/main.

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8

Seth, Tejaswi. "A Software Model for MATS Satellite Payload." Thesis, Luleå tekniska universitet, Rymdteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67474.

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This thesis presents the development of a software model that simulates a payload instrument onboard the MATS satellite. The goal of this model is to provide an understanding of how the instrument impacts the measured data. This model is important for error analysis and may help in correcting the measured data for systematic flaws in the instrument. The software will consist of 5 main modules as follows: Scene Generator, Optics Module,Stray Light Module, Charge-Coupled Device Module and Electronics Module. This thesis forms a basic foundation for the software by designing the CCD module and a part of the Optics module, and concludes the effects of both on the output of the system. It takes into account important mission defined procedures that ultimately aim to improve image quality, resolve vertical structures in different bandwidths and analyze noise effects on the measured data.

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9

Pernigotti, Letizia. "Geometry of moduli spaces of higher spin curves." Doctoral thesis, Università degli studi di Trento, 2013. https://hdl.handle.net/11572/369303.

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ABSTRACT: Roughly speaking, the moduli space of higher spin curves parametrizes equivalence classes of pairs (C, L) where C is a smooth genus g algebraic curve and L is a line bundle on it whose r-th tensor power is isomorphic to the canonical bundle of the curve. The aim of the talk is to discuss important geometrical properties of these spaces under different points of view: one possible compactification together with the description of the rational Picard group, their birational geometry in some low genus cases and their relation with some special locus inside the classical moduli spaces of curves.

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10

Butler, John Christopher. "Simulation analysis of multi-criteria decision models /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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11

Al-Haj, Ebrahem Mohammed. "Nonparametric accelerated degradation models in life-testing /." Search for this dissertation online, 2003. http://wwwlib.umi.com/cr/ksu/main.

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12

Lee, Eun-Joo. "Statistical analysis software for multiplicative interaction models /." Search for this dissertation online, 2004. http://wwwlib.umi.com/cr/ksu/main.

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13

Tasin, Luca. "Birational Maps in the Minimal Model Program." Doctoral thesis, Università degli studi di Trento, 2013. https://hdl.handle.net/11572/368878.

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14

Aldrete, Sánchez Rafael Manuel. "Feasibility evaluation model for toll highways /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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15

Čenytė, Justina. "Miglotojo kontekstinio panašumo mato modelio sudarymas ir tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2012~D_20131104_112644-58025.

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Informacijos amžiuje įvairūs tyrimo metodai generuoja milžiniškus kiekius duomenų, tačiau naudojant tik neapdorotus duomenis sunku atskleisti tiriamų objektų prigimtį, išsiaiškinti pagrindinę, kartais paslėptą struktūrą. Naudingai informacijai, o vėliau ir žinioms iš duomenų išgauti paprastai naudojami informacijos suformavimo (Information Retrieval) ir duomenų išgavimo (Data Mining) būdai. Panašumo tarp įvairių esybių nustatymas čia vaidina bene svarbiausią vaidmenį. Egzistuoja daugybė objektų tarpusavio panašumo nustatymo modelių ir teorijų, bet dauguma jų vienaip ar kitaip remiasi tam tikru objektų požymių tarpusavio palyginimu. Jau kurį laiką kalbama apie tai, kad dviejų esybių tarpusavio panašumas yra įtakojamas ne tik tų esybių požymių, bet ir konteksto, kuriame jie pasireiškia. Vadinasi dviejų esybių tarpusavio panašumas priklausomai nuo konteksto gali skirtis. Darbe aptariama kontekstinio panašumo svarba, esami konteksto apibrėžimai ir keli kontekstinį panašumą vertinantys matai. Išnagrinėjus literatūros šaltinius bus pristatytas kontekstinio panašumo formavimo būdas, kurio veikimas tiriamas naudojant dirbtinius ir realius duomenis.<br>Similarity is one of the most important aspects in the area of information retrieval and data mining. A new trend in similarity judgment assumes that similarity between two objects can not be expressed as a fixed value and depends on the context in which the similarity is measured. However no formal definition of context has yet been specified. In this thesis a new formal context definition is proposed and a method to measure contextual similarity is developed. The main idea behind this method is to extract context information from distinct groups of data. This method is tested with synthetic and real-world data sets comparing context similarity measure with distance based similarity. Results indicate that taking the similarity into account may cause significant changes in object similarity. This work shows the importance of context when measuring similarity.

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16

Greenough, Julee Ann. "Signalling of genetic quality in mate choice models." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302817.

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17

Bottazzi, Emanuele. "Nonstandard Models in Measure Theory and in functional Analysis." Doctoral thesis, Università degli studi di Trento, 2017. https://hdl.handle.net/11572/368322.

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This thesis is concerned with the study of nonstandard models in measure theory and in functional analysis. In measure theory, we define elementary numerosities, that are additive measures that take on values in a non-archimedean field and for which the measure of every singleton is 1. We have shown that, by taking the ratio with a suitable unit of measurement, from a numerosity it can be defined a non-atomic real-valued measure, and that every non-atomic measure can be obtained from a numerosity by this procedure. We then used numerosities to develop a model for the probability of infinite sequences of coin tosses coherent with the original ideas of Laplace. In functional analysis, we introduce a space of functions of nonstandard analysis with a formally finite domain, that extends both the space of distributions and the space of Young measures. Among the applications of this space of functions, we develop a continuous-in-time, discrete-in-space nonstandard formulation for a class of ill-posed forward-backward parabolic equations, and on the study of the regularity and asymptotic behaviour of its nonstandard solutions. This approach proved to be a viable alternative to the study of the vanishing viscosity limit of the solution of a pseudoparabolic regularization of the original problem.

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18

Hong, Jongpil. "Advertising media models for internet reach/frequency estimation /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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19

Menezes, Kim Anne. "Bayesian spatial models : applications for tropospheric ozone data /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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20

Brant, Molly D. "Asymptotically Ideal Model : applications to agricultural economics /." Search for this dissertation online, 2005. http://wwwlib.umi.com/cr/ksu/main.

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21

Carlson, Eric D. "A man ain't nothin but a man." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4923.

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Thesis (M.F.A.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 9, 2009) Includes bibliographical references.

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22

Shieh, Yann-yann. "An evaluation of mixed effects multilevel modeling under conditions of error term nonnormality /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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23

Bottazzi, Emanuele. "Nonstandard Models in Measure Theory and in functional Analysis." Doctoral thesis, University of Trento, 2017. http://eprints-phd.biblio.unitn.it/2056/1/Tesi.pdf.

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This thesis is concerned with the study of nonstandard models in measure theory and in functional analysis. In measure theory, we define elementary numerosities, that are additive measures that take on values in a non-archimedean field and for which the measure of every singleton is 1. We have shown that, by taking the ratio with a suitable unit of measurement, from a numerosity it can be defined a non-atomic real-valued measure, and that every non-atomic measure can be obtained from a numerosity by this procedure. We then used numerosities to develop a model for the probability of infinite sequences of coin tosses coherent with the original ideas of Laplace. In functional analysis, we introduce a space of functions of nonstandard analysis with a formally finite domain, that extends both the space of distributions and the space of Young measures. Among the applications of this space of functions, we develop a continuous-in-time, discrete-in-space nonstandard formulation for a class of ill-posed forward-backward parabolic equations, and on the study of the regularity and asymptotic behaviour of its nonstandard solutions. This approach proved to be a viable alternative to the study of the vanishing viscosity limit of the solution of a pseudoparabolic regularization of the original problem.

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24

He, Xiaojun Velu Rajabather Palani. "Two essays on applications of mixture models in finance." Related Electronic Resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2003. http://wwwlib.umi.com/cr/syr/main.

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25

Kasetkasem, Teerasit. "Image analysis methods based on Markov random field models." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2002. http://wwwlib.umi.com/cr/syr/main.

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26

Huggahalli, Madhusudhan. "Steam regeneration of activated carbon beds : mechanisms and models /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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27

Lelas, Vedran. "Chance constrained models for air pollution monitoring and control /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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28

Roberts, Gregory Joel. "Models of health appraisal in persons with multiple sclerosis /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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29

McBrayer, Mickey Charles. "Calibration of groundwater flow models for modeling and teaching /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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30

ALEANDRI, MICHELE. "Inhomogeneous mean fields models and applications." Doctoral thesis, Gran Sasso Science Institute, 2019. http://hdl.handle.net/20.500.12571/9725.

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31

Abdelwahab, Ahmed Farouk. "Through-flow model for fan/flow-resistance configurations." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2002. http://wwwlib.umi.com/cr/syr/main.

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32

Schelp, Richard Charles. "The standard model and beyond in noncommutative geometry /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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33

Paronuzzi, Paolo <1989&gt. "Models and algorithms for decomposition problems." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amsdottorato.unibo.it/9330/1/Thesis_Paronuzzi.pdf.

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This thesis deals with the decomposition both as a solution method and as a problem itself. A decomposition approach can be very effective for mathematical problems presenting a specific structure in which the associated matrix of coefficients is sparse and it is diagonalizable in blocks. But, this kind of structure may not be evident from the most natural formulation of the problem. Thus, its coefficient matrix may be preprocessed by solving a structure detection problem in order to understand if a decomposition method can successfully be applied. So, this thesis deals with the k-Vertex Cut problem, that is the problem of finding the minimum subset of nodes whose removal disconnects a graph into at least k components, and it models relevant applications in matrix decomposition for solving systems of equations by parallel computing. The capacitated k-Vertex Separator problem, instead, asks to find a subset of vertices of minimum cardinality the deletion of which disconnects a given graph in at most k shores and the size of each shore must not be larger than a given capacity value. Also this problem is of great importance for matrix decomposition algorithms. This thesis also addresses the Chance-Constrained Mathematical Program that represents a significant example in which decomposition techniques can be successfully applied. This is a class of stochastic optimization problems in which the feasible region depends on the realization of a random variable and the solution must optimize a given objective function while belonging to the feasible region with a probability that must be above a given value. In this thesis, a decomposition approach for this problem is introduced. The thesis also addresses the Fractional Knapsack Problem with Penalties, a variant of the knapsack problem in which items can be split at the expense of a penalty depending on the fractional quantity.

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34

Pernigotti, Letizia. "Geometry of moduli spaces of higher spin curves." Doctoral thesis, University of Trento, 2013. http://eprints-phd.biblio.unitn.it/1141/1/TesiDottoratoPernigotti.pdf.

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ABSTRACT: Roughly speaking, the moduli space of higher spin curves parametrizes equivalence classes of pairs (C, L) where C is a smooth genus g algebraic curve and L is a line bundle on it whose r-th tensor power is isomorphic to the canonical bundle of the curve. The aim of the talk is to discuss important geometrical properties of these spaces under different points of view: one possible compactification together with the description of the rational Picard group, their birational geometry in some low genus cases and their relation with some special locus inside the classical moduli spaces of curves.

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35

Hallagan, Jean Elizabeth Masingila Joanna O. "Teachers' models of student responses to middle school algebraic tasks." Related Electronic Resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2003. http://wwwlib.umi.com/cr/syr/main.

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36

Mai, Enping (Shirley). "Models for identifying lapsed buyers in a non-contractual setting." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2008. http://wwwlib.umi.com/cr/syr/main.

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37

Kwok, Yan. "Proposed models for quinobenzoxazine and psorospermin-topoisomerase II-DNA complexes /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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38

Thengvall, Benjamin Glover. "Models and solution techniques for the aircraft schedule recovery problem /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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39

Tasin, Luca. "Birational Maps in the Minimal Model Program." Doctoral thesis, University of Trento, 2013. http://eprints-phd.biblio.unitn.it/1110/1/Thesis.pdf.

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40

Zhang, Sidong. "Dynamic model of quality improvement using quantity incentive contract." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2008. http://wwwlib.umi.com/cr/syr/main.

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41

Lin, Martin Wei-min. "A model and simulation of competitive electric power systems /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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42

Ghobarah, Hazem. "A statistical assessment of the spatial model of ideology /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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43

Fernandes, Muritiba Albert Einstein <1983&gt. "Algorithms and Models For Combinatorial Optimization Problems." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2897/1/FernandesMuritiba_AlbertEinstein_tesi.pdf.

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In this thesis we present some combinatorial optimization problems, suggest models and algorithms for their effective solution. For each problem,we give its description, followed by a short literature review, provide methods to solve it and, finally, present computational results and comparisons with previous works to show the effectiveness of the proposed approaches. The considered problems are: the Generalized Traveling Salesman Problem (GTSP), the Bin Packing Problem with Conflicts(BPPC) and the Fair Layout Problem (FLOP).

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44

Fernandes, Muritiba Albert Einstein <1983&gt. "Algorithms and Models For Combinatorial Optimization Problems." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2897/.

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Abstract:

In this thesis we present some combinatorial optimization problems, suggest models and algorithms for their effective solution. For each problem,we give its description, followed by a short literature review, provide methods to solve it and, finally, present computational results and comparisons with previous works to show the effectiveness of the proposed approaches. The considered problems are: the Generalized Traveling Salesman Problem (GTSP), the Bin Packing Problem with Conflicts(BPPC) and the Fair Layout Problem (FLOP).

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45

Bessi, Andrea <1984&gt. "Models and Algorithms For Operations Management Applications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8668/1/Tesi%20Andrea%20Bessi.pdf.

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Abstract:

In the last decades, there has been a huge evolution in the development and application of Derivative Free Optimization (DFO) techniques. One of the major emerging DFO application fields are the optimal design of industrial products and machines and the development of efficient computer software. This Ph.D. thesis focuses on the exploration of the emerging DFO techniques, oriented especially in the optimization of real-world industrial problem. In this thesis is firstly presented a brief overview of the main DFO techniques and application. Then, are reported two works describing the development of DFO approaches aimed to tackle the optimization of Computer Vision Algorithms (CVA), employed in the automatic defect detection of pieces produced by a real-world industries.

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46

Ngaye, Zonke. "User experience metrics for Dr Math." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1012036.

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Abstract:

The purpose of this research study is to propose guidelines for providing a positive user experience for pupils using Dr Math®. User experience was found to have a positive impact on the acceptance and adoption of a product. Thus the proposed guidelines contribute in maximizing the adoption and acceptance of Dr Math® among pupils. This study begins with an introductory chapter that describes the problem that forms the basis for this research. The chapter defines the objectives that this study is intended to achieve in order to accomplish its ultimate goal. The methodology followed to conduct this research study as well as its scope are also defined here. The results from a preliminary survey revealed that despite its potential accessibility, Dr Math® has a low adoption rate. However, when compared to other mobile learning (m-learning) applications for mathematics learning, Dr Math® is more popular. Thus Dr Math® was selected as a case for study. Chapter 2 of this study provides a detailed description of Dr Math® as a local mobile application for mathematics learning. It was found that the affordability and accessibility of Dr Math® did not necessarily imply a high adoption rate. There are various possible barriers to its low adoption. User experience (UX), which is the focus of this study, is one of them. Thus, a subsequent chapter deals with UX. Chapter 3 discusses UX, its scope, components and definition and places particular emphasis on its significance in the success of any product. The chapter also highlights the characteristics of a positive UX and the importance of designing for this outcome. In Chapter 4, a discussion and justification of the methodology used to conduct this research is discussed. This study primarily employs a qualitative inductive approach within an interpretivism paradigm. An exploratory single case study was used to obtain an in-depth analysis of the case. Data was collected using Dr Math® log files as a documentary source. Gathered data was then analysed and organized into themes and categories using qualitative content analysis as outlined in Chapter 5. Also the findings obtained from the results, which are mainly the factors that were found to have an impact on the user interaction with Dr Math®, are presented here. The identified factors served as a basis from which the guidelines presented in Chapter 6 were developed. Chapter 7 presents the conclusions and recommendations of the research. From both theoretical and empirical work, it was concluded that Dr Math® has the potential to improve mathematics learning in South Africa. Its adoption rate, however, is not satisfying: hence, the investigation of the factors impacting on the user interaction with Dr Math®, from which the proposed guidelines are based.

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Falconi, Marco <1983&gt. "Classical limit of the Nelson model." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4631/1/marco_falconi_tesi.pdf.

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Abstract:

Since the development of quantum mechanics it has been natural to analyze the connection between classical and quantum mechanical descriptions of physical systems. In particular one should expect that in some sense when quantum mechanical effects becomes negligible the system will behave like it is dictated by classical mechanics. One famous relation between classical and quantum theory is due to Ehrenfest. This result was later developed and put on firm mathematical foundations by Hepp. He proved that matrix elements of bounded functions of quantum observables between suitable coherents states (that depend on Planck's constant h) converge to classical values evolving according to the expected classical equations when h goes to zero. His results were later generalized by Ginibre and Velo to bosonic systems with infinite degrees of freedom and scattering theory. In this thesis we study the classical limit of Nelson model, that describes non relativistic particles, whose evolution is dictated by Schrödinger equation, interacting with a scalar relativistic field, whose evolution is dictated by Klein-Gordon equation, by means of a Yukawa-type potential. The classical limit is a mean field and weak coupling limit. We proved that the transition amplitude of a creation or annihilation operator, between suitable coherent states, converges in the classical limit to the solution of the system of differential equations that describes the classical evolution of the theory. The quantum evolution operator converges to the evolution operator of fluctuations around the classical solution. Transition amplitudes of normal ordered products of creation and annihilation operators between coherent states converge to suitable products of the classical solutions. Transition amplitudes of normal ordered products of creation and annihilation operators between fixed particle states converge to an average of products of classical solutions, corresponding to different initial conditions.

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48

Falconi, Marco <1983&gt. "Classical limit of the Nelson model." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4631/.

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Abstract:

Since the development of quantum mechanics it has been natural to analyze the connection between classical and quantum mechanical descriptions of physical systems. In particular one should expect that in some sense when quantum mechanical effects becomes negligible the system will behave like it is dictated by classical mechanics. One famous relation between classical and quantum theory is due to Ehrenfest. This result was later developed and put on firm mathematical foundations by Hepp. He proved that matrix elements of bounded functions of quantum observables between suitable coherents states (that depend on Planck's constant h) converge to classical values evolving according to the expected classical equations when h goes to zero. His results were later generalized by Ginibre and Velo to bosonic systems with infinite degrees of freedom and scattering theory. In this thesis we study the classical limit of Nelson model, that describes non relativistic particles, whose evolution is dictated by Schrödinger equation, interacting with a scalar relativistic field, whose evolution is dictated by Klein-Gordon equation, by means of a Yukawa-type potential. The classical limit is a mean field and weak coupling limit. We proved that the transition amplitude of a creation or annihilation operator, between suitable coherent states, converges in the classical limit to the solution of the system of differential equations that describes the classical evolution of the theory. The quantum evolution operator converges to the evolution operator of fluctuations around the classical solution. Transition amplitudes of normal ordered products of creation and annihilation operators between coherent states converge to suitable products of the classical solutions. Transition amplitudes of normal ordered products of creation and annihilation operators between fixed particle states converge to an average of products of classical solutions, corresponding to different initial conditions.

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49

Cheung, Kai Chung. "Facultative sex model /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?MATH%202008%20CHEUNG.

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Plemmons, William. "A MATHEMATICAL STUDY OF MALARIA MODELS OF ROSS AND NGWA." Master's thesis, University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2361.

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Malaria is a vector borne disease that has been plaguing mankind since before recorded history. The disease is carried by three subspecies of mosquitoes Anopheles gambiae, Anopheles arabiensis and Anopheles funestu. These mosquitoes carry one of four type of Plasmodium specifically: P. falciparum, P. vivax, P. malariae or P. ovale. The disease is a killer; the World Health Organization (WHO) estimates that about 40% of the world's total populations live in areas where malaria is an endemic disease and as global warming occurs, endemic malaria will spread to more areas. The malaria parasite kills a child every 30 seconds. In Africa alone, as many as one million children die annually from malaria before they reach the age of 5. The World Health Organization has an estimate of 100-200 million victims annually. Malaria has many mathematical models and this paper will examine several different models in order to achieve a greater understanding of this disease.<br>M.S.<br>Department of Mathematics<br>Sciences<br>Mathematics

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