Дисертації з теми "Instrumental modelling"
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Ellis-Braithwaite, Richard. "Modelling the instrumental value of software requirements." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/21803.
Повний текст джерелаMcKenna, Paul. "Delta operator : modelling, forecasting and control." Thesis, Lancaster University, 1997. http://eprints.lancs.ac.uk/65542/.
Повний текст джерелаGoldsmith, Kimberley. "Instrumental variable and longitudinal structural equation modelling methods for causal mediation : the PACE trial of treatments for chronic fatigue syndrome." Thesis, King's College London (University of London), 2014. https://kclpure.kcl.ac.uk/portal/en/theses/instrumental-variable-and-longitudinal-structural-equation-modelling-methods-for-causal-mediation-the-pace-trial-of-treatments-for-chronic-fatigue-syndrome(413e5fb0-03b9-40bc-b993-0465b1bcbdee).html.
Повний текст джерелаTurner, Alexander James. "Economic analysis of the causes and consequences of social and emotional well-being in childhood." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/economic-analysis-of-the-causes-and-consequences-of-social-and-emotional-wellbeing-in-childhood(e59a2e05-d842-46e0-9c63-17c84ffc564a).html.
Повний текст джерелаLaird, Joel Augustus. "The physical modelling of drums using digital waveguides." Thesis, University of Bristol, 2001. http://hdl.handle.net/1983/ebd75b4b-bcdd-4cc7-b153-a6e0007682aa.
Повний текст джерелаTorres-Echeverria, Alejandro C. "Modelling and optimization of Safety Instrumented Systems based on dependability and cost measures." Thesis, University of Sheffield, 2009. http://etheses.whiterose.ac.uk/106/.
Повний текст джерелаDesvages, Charlotte Genevieve Micheline. "Physical modelling of the bowed string and applications to sound synthesis." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31273.
Повний текст джерелаNoreland, Daniel. "Numerical Techniques for Acoustic Modelling and Design of Brass Wind Instruments." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3507.
Повний текст джерелаTorin, Alberto. "Percussion instrument modelling in 3D : sound synthesis through time domain numerical simulation." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/31029.
Повний текст джерелаHarrison-Harsley, Reginald Langford. "Physical modelling of brass instruments using finite-difference time-domain methods." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31272.
Повний текст джерелаTheissen, Nikolas Alexander. "Physics-based modelling and measurement of advanced manufacturing machinery’s positioning accuracy : Machine tools, industrial manipulators and their positioning accuracy." Licentiate thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263700.
Повний текст джерелаFougere, Nicolas, K. Altwegg, J. J. Berthelier, A. Bieler, D. Bockelée-Morvan, U. Calmonte, F. Capaccioni, et al. "Direct Simulation Monte Carlo modelling of the major species in the coma of comet 67P/Churyumov-Gerasimenko." OXFORD UNIV PRESS, 2016. http://hdl.handle.net/10150/624746.
Повний текст джерелаYoung, Melissa Marie. "Consumer Identity." Master's thesis, Vysoká škola ekonomická v Praze, 2009. http://www.nusl.cz/ntk/nusl-16844.
Повний текст джерелаGunawan, David Oon Tao Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Musical instrument sound source separation." Awarded By:University of New South Wales. Electrical Engineering & Telecommunications, 2009. http://handle.unsw.edu.au/1959.4/41751.
Повний текст джерелаLysér, Oskar, and Viktor Sylvén. "Ger IFRS 9 bättre beslutsunderlag? : En dokumentstudie ur en investerares perspektiv." Thesis, Karlstads universitet, Handelshögskolan (from 2013), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-79139.
Повний текст джерелаIFRS 9 is a new standard which intend to improve accounting of financial instruments. The precursor IAS 39 was heavily criticized during the financial crises in 2008 because of its late recognition of credit loss. IFRS 9 introduces a new forward-looking approach that considers future macroeconomic factors. Previous research has mainly been studying banks and future effects of the standards implementation. No essential effects have been shown in previous research. What distinguishes our study is that we try to interpret the effects of implementation in different sectors and to analyze whether the effect of IFRS 9 has affected investors’ decision-making. To achieve the purpose of this thesis, a document analysis of different companies in various industries has been conducted. This thesis has been analyzed from an investors point of view which is based on IASB’s conceptual framework. This thesis has not seen any essential effects from the implementation of IFRS 9 in the financial reports. From the qualitative characteristics the financial information for an investor has improved and its relevance has increased, which has affected the investors’ decision-making, in a positive manner. After the implementation the big difference is that the annual deposition to the reserve for credit loss has increased for companies in all industries. Although, we believe that the big differences with IFRS 9 can first be interpreted in a recession.
Seo, Kyungwoon. "Representation as a language of scientific practice: exploring students’ views on the use of representation and the linkage to understanding of scientific models." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/6281.
Повний текст джерелаViglund, Kerstin. "Inner strength among old people : a resource for experience of health, despite disease and adversities." Doctoral thesis, Umeå universitet, Institutionen för omvårdnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-82719.
Повний текст джерелаBakgrund Inre styrka har beskrivits som ett viktigt fenomen associerat till att hantera sjukdom, till hälsa och åldrande. För att öka kunskapen om fenomenet inre styrka genomfördes en metateoretisk analys som resulterade i en Inre Styrka modell där inre styrka omfattar fyra samverkande dimensioner; samhörighet, kreativitet, flexibilitet och fasthet. Modellen har använts i denna avhandling som ett teoretiskt ramverk. Syfte Det övergripande syftet med denna avhandling var att utveckla och testa en skala som mäter inre styrka, beskriva inre styrka i en population av äldre, och att belysa dess betydelse för upplevelsen av hälsa, trots sjukdom 0ch motgångar. Metod Studierna som genomfördes hade kvantitativ ansats med tvärsnittsdesign (I-III) och kvalitativ ansats med narrativa intervjuer (IV). Alla studier var en del av GErontologiska Regionala DAtabas (GERDA) Botnia projektet. Deltagarna i studie I (n= 391, 19-90 år) var mestadels från norra delarna av Sverige. I studierna II och III var deltagarna (n=6119, 65, 70, 75 och 80 år) från Sverige och Finland. I studie IV var deltagarna (n=12, 67-82 år) från Västerbotten. Data analyserades med hjälp av principalkomponentanalys och konfirmatorisk faktor analys (CFA), varierande statistik, strukturell ekvationsmodellering, och kvalitativ innehållsanalys. Resultat I studie I utvecklades och testades Inre Styrka Skalan (ISS). En inledande 63 frågors ISS reducerades till en slutlig 20 frågors ISS. Baserad på de fyra dimensionerna av inre styrka bekräftades en fyrafaktors lösning med 51 % förklaringsgrad och CFA visade ett tillfredställande goodness-of-fit. I studie II beskrevs inre styrka i relation till ålder, kön och kultur. Det högsta totala ISS medelvärdet skattades bland 65-åringarna med lägre medelvärden för varje efterföljande ålder (70, 75 och 80 år). Kvinnor skattade ett något högre totalt ISS medelvärde än män och det var inte några större skillnader mellan regionerna i Sverige och Finland. I studie III bekräftades den hypotes som lagts fram, att inre styrka kan mediera i relationen mellan sjukdom och upplevelsen av hälsa. Bias-corrected bootstrap visade en signifikant indirekt effekt i relationen mellan sjukdom och upplevelsen av hälsa, medierad av inre styrka, och test av modellens goodness-of-fit var tillfredsställande. I studie IV, utifrån berättelserna om inre styrka visade det sig att inre styrka omfattar känslor av samhörighet och att finna livet värt att leva. Att ha tillit till sig själv och sina möjligheter, och att kunna möta och ta aktiv del i situationen beskrevs också. Slutligen, att komma igen och hitta vägar att gå vidare i livet var viktiga aspekter av inre styrka. Slutsatser Den nyutvecklade Inre Styrka Skalan är ett reliabelt och valitt instrument som fångar ett brett perspektiv av inre styrka. Basdata om inre styrka i en stor population äldre i Sverige och Finland har presenterats, och visar det högsta ISS medelvärdet bland 65-åringarna. Inre styrka bland äldre är en resurs för upplevelsen av hälsa, trots sjukdom och motgångar. Denna avhandling bidrar till att öka kunskapen om fenomenet inre styrka och ger evidens för att inre styrka har en viktig betydelse för äldres välbefinnande. Ökad kunskap om de fyra dimensionerna av inre styrka; samhörighet, kreativitet, flexibilitet, och fasthet, föreslås kunna vara en hjälp för vårdpersonal i deras arbete att identifiera var behovet av stöd är störst och att sätta in insatser som främjar och stärker inre styrka.
GErontologiska Regionala DAtabas (GERDA) Botnia projektet
Orelli, Paiva Guilherme. "Vibroacoustic Characterization and Sound Synthesis of the Viola Caipira." Thesis, Le Mans, 2017. http://www.theses.fr/2017LEMA1045/document.
Повний текст джерелаThe viola caipira is a type of Brazilian guitar widely used in popular music. It consists of ten metallic strings arranged in five pairs, tuned in unison or octave. The thesis work focuses on the analysis of the specificities of musical sounds produced by this instrument, which has been little studied in the literature.The analysis of the motions of plucked strings using a high speed camera shows the existance of sympathetic vibrations, which results in a sound halo, constituting an important perceptive feature. These measurements also reveal the existence of shocks between strings, which lead to very clearly audible consequences. Bridges mobilities are also measured using the wire-breaking method, which is simple to use and inexpensive since it does not require the use of a force sensor. Combined with a high-resolution modal analysis (ESPRIT method), these measurements enable to determine the modal shapes at the string/body coupling points and thus to characterize the instrument.A physical modelling, based on a modal approach, is carried out for sound synthesis purposes. It takes into account the strings motions according to 2 polarizations, the couplings with the body and the collisions between strings. This model is called a hybrid model because it combines an analytical approach to describe the vibrations of strings and experimental data describing the body. Simulations in the time domain reveal the main characteristics of the viola caipira
Wisheart, M. "Impact properties and finite element analysis of a pultruded composite system." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/12474.
Повний текст джерелаRobinson, Matthew. "Development of planar technology for focal planes of future radio to sub-millimetre astronomical instruments." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/development-of-planar-technology-for-focal-planes-of-future-radio-to-submillimetre-astronomical-instruments(dd2876aa-ff1a-4ae7-903f-a8228f3fc85f).html.
Повний текст джерелаOliveira, Luiz Claudio Marangoni de 1975. "Contribuições para melhoria do desempenho e viabilidade de fabricação de scanners indutivos." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263395.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-06T21:02:18Z (GMT). No. of bitstreams: 1 Oliveira_LuizClaudioMarangonide_D.pdf: 9710529 bytes, checksum: 4fc22426f2b4d1d845715c4742df71a2 (MD5) Previous issue date: 2006
Resumo: Scanners são dispositivos que defletem um feixe luminoso e transfonnam um feixe puntual em uma linha de varredura, com amplitude e freqüência controladas. Diversos equipamentos utilizam este padrão luminoso para codificar ou decodificar infonnações, exemplos mais comuns são os leitores de código de barras de bancada, utilizados em supennercados, e as impressoras laser. V ários fenômenos podem ser empregados para defletir um feixe luminoso. Neste trabalho, os scanners utilizam o princípio da reflexão da luz por um espelho em movimento hannônico e ressonante sob ação de forças de origem eletromagnética. Tais forças são geradas pela interação de correntes induzi das na annadura, com o campo magnético produzido por ímãs pennanentes. A principal vantagem deste tipo de scanner é a ausência de conexões elétricas entre as partes móveis e fixas do dispositivo, o que simplifica o processo de fabricação e o toma mais robusto e menos suceptível a falhas. Parte dos scanners similares existentes atualmente são dispositivos eletro-mecânicos complexos, fabricados em série. Trabalhos anteriores demonstraram a viabilidade da geometria planar e da utilização de processos de fabricação em lotes, derivados da microeletrônica, neste tipo de scanner. Os protótipos fabricados, embora funcionais, apresentaram consumo de potência acima da média para este tipo de dispositivo, o que demonstrava a necessidade de melhorias em seu projeto. O processo de fabricação, embora confiável, foi desenvolvido com materiais e métodos baseados no Silício e originários da microeletrônica, o que dificultava sua implantação em indústrias em território nacional. Neste trabalho, foram pr9postos aprimoramentos à tecnologia dos scanners ressonantes planares atuados por indução para tomar seu desempenho compatível com o d~ dispositivos similares, e também para viabilizar sua fabricação utilizando materiais e métodos disponíveis no país. Uma metodologia de projeto, em conjunto com uma série de contribuições ao modelo, foi proposta e avaliada. Para viabilizar a fabricação propôs-se a utilização do Bronze-fosforoso, como material estrutural, e a utilização de foto-fabricação, como processo de fabricação. As contribuições propostas neste trabalho possibilitaram a redução do consumo de potência de 2, 2 W para cerca de 5 m W por grau óptico, e o aumento da freqüência de operação do circuito de cerca de 1 kHz para 4 kHz, com um ângulo de deflexão óptico típico de 20° pico-a-pico, parâmetros compatíveis com os de dispositivos similares, mas mecanicamente mais complexos e fabricados por processo serial
Abstract: Scanners are devices that deftects a light beam and converts a spot light in a well controlled amplitude and frequency scan line. Several applications uses the generated pattem to code or decode data, common examples ar,e barcode readers, and laser printers. A light beam can be deftected by different means. In this work, the scanner deftects the light by reftection in a moving mirror, in a resonant and harmonic movement, subjected to forces of electromagnetic nature. Such forces are generated by the interaction between an induced current in the armature, and a magnetic field, generated by permanent magnets. The main advantage of this kind of scanner is the absence of electrical connections between the mobile, and fixed parts of the device, that simplifies the fabrication process, and make its more reliable and less fault susceptible. Part of the similar devices available today are complex eIectro-mechanical devices, manufactured by serial processo Earlier works established that the planar geometry, and the use of batch fabrication process, derived from microelectronics, are feasible with this kind of device. A1though functional, the earlier prototypes presented a high power consumption, that shown the demand for an improved designo The Silicon-based fabrication process adopted makes the use of materiaIs and methods that are not readily accessible to the Brazilian industry. In this work improvements were proposed to the induction actuated planar resonant scanners technology. The goal was to make its performance compatible with the performance of similar devices, and to enable its fabrication using materiaIs and methods available to the Brazilian industry. A design m~thodology, and a set of model contributions were proposed and validated. The use of Phosphor-bronze, as structural material, and the photqfabrication process, as the machining method, were proposed as an option to the Silicon-based fabrication method. The contributions ofthis work had enabled the reduction ofthe power consumptlon from 2,2 W to about 5 m W per optical degree, and an increase in the working frequency from 1 kHz to 4kHz, with a optical deftection angle of about 20° peak-to-peak. Such parameters are fully compatible with similar devices, mechanically more complexes and manufactured by serial processes
Doutorado
Mecanica dos Sólidos e Projeto Mecanico
Doutor em Engenharia Mecânica
Samaan, Mariam. "La photogrammétrie rapprochée au service de l'archéologie préventive." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1068/document.
Повний текст джерелаThe development of digital cameras, the computational power of computers, photogrammetry and computer vision research has led to the recent emergence of operational solutions for building automatically 3D models from shooting multiple overlays (stereoscopic multi).For example, taking the "good" photos, it is now possible to achieve in a few hours of calculation and a few minutes of operator interaction, rigorous ortho-photos that, there a few years have asked for days restitution. These methods are starting to be widespread among some in the heritage survey (architects or archaeologists) and an economy even starting to build around 3D modeling services.However, these methods are far from being fully accepted by the majority of potential users. Among the brakes associated with the dissemination of these techniques to the scientific heritage, ignorance of the rules of photographic acquisition to take optimum advantage of modeling tools per photo.The objective of this thesis is to do a job transfer and accompany the actual world of technology tools and IT to the users in the field of heritage. More specifically, the theme chosen for application is that of preventive archeology, in which the constraints of budget and timetable for the completion of excavations make it particularly interesting methods identified by photograph.Our work has focused exclusively on the development of photogrammetric methods from acquiring reliable and lightweight image protocols and treatments for each stage of the calculation chain.The choice to treat a particular type of object in the context of our work is independent of any classification of the many specialties of archeology, but is instead linked to a methodological framework, preferring multiply experimental protocols documentation rather small artifacts that diversify the type remains to be documented. Beyond the case of small artifacts, the issues raised by the documentation of an archaeological dig as a site "living" were also partially addressed. Survey methods capable of recording exhaustively all objects discovered while linking to a particular stratigraphy have indeed been studied
Pískatá, Petra. "Vliv nejistoty modelů projektů na investiční rozhodování." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-433595.
Повний текст джерелаLafarge, David. "Analyse didactique de l'enseignement-apprentissage de la chimie organique jusqu'à bac+2 pour envisager sa restructuration." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2010. http://tel.archives-ouvertes.fr/tel-00578419.
Повний текст джерелаBarth, Thierry. "Vers une observation inter-disciplinaire des phénomènes naturels sur les bassins versants de montagne : Hydrogéologie à coût limité du bassin du Vorz (Massif de Belledonne, Isère)." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00764344.
Повний текст джерелаYoo, Thomas. "Application of a Multimodal Polarimetric Imager to Study the Polarimetric Response of Scattering Media and Microstructures." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX106/document.
Повний текст джерелаThe work carried out during this thesis was aimed to study the interaction of polarized light from the scattering media and particles. This work is part of a strong collaborative context between the LPICM and various private and public laboratories. A wide variety of aspects have been treated deeply, including instrumental development, advanced numerical simulation and the creation of measurement protocols for the interpretation of complex data.The instrumental part of the thesis was devoted to the development of an innovative instrument, suitable for taking polarimetric images at different scales (from millimeters to microns) that can be quickly reconfigured to offer different imaging modes of the same sample. The two main aspects that characterize the instrument are i) the possibility of obtaining real polarimetric images of the sample and the angular distribution of light scattered by an illuminated zone whose size and position can be controlled, ii) the total control of the polarization state, size and divergence of the beams. These two aspects are not united on any other commercial or experimental apparatus today.The first object of the study using the multimodal imaging polarimeter was to study the effect of the thickness from a scattering medium on its optical response. In medical imaging, there is a broad consensus on the benefits of using different polarimetric properties to improve the effectiveness of optical screening techniques for different diseases. Despite these advantages, the interpretation of the polarimetric responses in terms of the physiological properties of tissues has been obscured by the influence of the unknown thickness of the sample.The objective of the work was, therefore, to better understand the dependence of the polarimetric properties of different scattering materials with the known thickness. In conclusion, it is possible to show that the polarimetric properties of the scattering media vary proportionally with the optical path that the light has traveled inside the medium, whereas the degree of polarization depends quadratically on the optical path. This discovery could be used to develop a method of data analysis that overcomes the effect of thickness variations, thus making the measurements very robust and related only to the intrinsic properties of the samples studied.The second object of study was to study the polarimetric responses from particles of micrometric size. The selection of the particles studied by analogy to the size of the cells that form the biological tissues, and which are responsible for the dispersion of light. By means of the polarimetric measurements, it has been discovered that when the microparticles are illuminated with an oblique incidence with respect to the optical axis of the microscope, they appear to behave as if they were optically active. Moreover, it has been found that the value of this apparent optical activity depends on the shape of the particles. The explanation of this phenomenon is based on the appearance of a topological phase of the beam. This topological phase depends on the path of the light scattered inside the microscope. The unprecedented observation of this topological phase has been done by the fact that the multimodal polarimetric imager allows illumination of the samples at the oblique incidence. This discovery can significantly improve the efficiency of optical methods for determining the shape of micro-objects
Budi, Wibowo Sandy. "Approches multiscalaires de l'érosion du volcan Merapi, Indonésie : contribution à la compréhension du déclenchement et de la dynamique des lahars." Thesis, Paris 1, 2016. http://www.theses.fr/2016PA01H044/document.
Повний текст джерелаThe erosion of volcanic edifices is a series of geomorphological processes that occurs during, before or without eruption. This process also involves the term "lahar" which is characterized by dense mixtures of volcanic materials and water, rapidly flowing from a volcano with important spatio-temporal rheological changes. The erosion of volcanic edifices is still poorly understood, particularly because data collection in the field is difficult. However, lahars have caused at least 44,250 deaths from 1600 to 2010 of which 52%due to a single event in 1985 (Nevado del Ruiz, Colombia).This study proposes a multi-scalar approach to better understand the nature of the erosion of volcanic edifices, especially on lahar initiation process and dynamics. The eruption of the Merapi volcano(Indonesia) in 2010 was an opportunity to produce new data. The first part of this thesis focused on the lahar initiation process, was based on field data and laboratory experiments. The field work was intended to compare a volcanically disturbed watershed by the eruption of 2010 and an undisturbed watershed, by conducting in-situ observations and field instrumentation. In the laboratory, an experimental approach was performed using 8 different scenarios on a flume. The second part of the thesis related to the dynamics of two lahars in motion was conducted using coupling between video footage and seismic signal. Lahar deposits were also analyzed based on the chronology of the flows. Three years after the eruption of Merapi in 2010, the frequency of lahar occurrence decreased. However, juvenile ash fall deposits (volcanic ash) from another eruption of a nearby volcano (Kelud in East Java) in February 2014 resulted a significant increase of lahars occurrence. Lahars triggering process was also favored by a landslides occurring in the night of 6 to 7 December 2012, of which the deposit was connected to the thalweg. The dynamics of the two lahars were observed and filmed on 28 February and18 March 2014. Those lahars were divided into four phases: (1) hyperconcentrated flow, (2) the peak of debris flow, (3) lahar body, and (4) lahar tail. Video analysis and in-situ observation on active lahars allowed us to create detailed hydrographs indicating flow depth, velocity, discharge and the number of floated boulders. Lahar dynamics on different topography of the channel caused a very different seismic frequency. The formation of lahar deposits was correlated with the flow dynamics and required an in-situ observation for the validation of the interpretation
Erosi kerucut vulkanik merupakan hasil dari serangkaian proses geomorfologi yang terjadi baik selama,sebelum atau tanpa erupsi. Proses ini juga melibatkan "lahar" yang didefinisikan sebagai aliran cepat daridaerah puncak gunung menuju hilir dengan membawa material vulkanik yang bercampur dengan airdimana dinamika alirannya terus berubah secara spasial dan temporal. Erosi struktur vulkanik masihsedikit ditelaah, terutama karena sulitnya pengumpulan data di lapangan. Padahal, lahar telahmenyebabkan setidaknya 44.250 kematian dari tahun 1600 sampai 2010, dimana 52% -nya terkait denganbencana pada tahun 1985 di gunung Nevado del Ruiz (Kolombia).Penelitian ini mengusulkan pendekatan multi-skalar untuk lebih memahami karakteristik erosi kerucutvulkanik terutama yang terkait dengan pemicu dan dinamika aliran lahar. Letusan Gunung Merapi(Indonesia) pada tahun 2010 memberikan kesempatan untuk menghasilkan data lapangan baru. Bagianpertama dari disertasi ini, mengenai pemicu lahar, dilakukan berdasarkan data lapangan dan experimenlaboratorium. Kegiatan lapangan dimaksudkan untuk membandingkan DAS yang terdampak oleh letusan2010 dan DAS alami, melalui pengamatan in-situ dan instrumentasi lapangan. Di laboratorium,pendekatan eksperimental dilakukan dengan menggunakan 8 skenario yang berbeda pada flume. Bagiankedua dari disertasi ini berkaitan dengan dinamika aliran lahar aktif yang dipelajari dari perpaduanrekaman video dan sinyal seismik. Proses sedimentasi juga dianalisis dengan dipertimbangkan kronologialiran lahar.Tiga tahun setelah letusan Merapi pada tahun 2010, frekuensi kejadian lahar berkurang. Namun,sedimentasi abu vulkanik yang berasal dari gunung api lain (Kelud di Jawa Timur) telah mengakibatkanpeningkatan jumlah lahar yang signifikan sejak Februari 2014. Pembentukan lahar juga dipicu oleh tanahlongsor yang terjadi pada pada malam 6 menuju 7 Desember 2012 dimana materialnya terhubunglangsung ke thalweg. Dinamika dua aliran lahar diamati dan difilmkan pada tanggal 28 Februari dan 18Maret 2014. Lahar tersebut dibagi menjadi empat fase: (1) aliran hyperconcentrated, (2) puncak alirandebris, (3) tubuh lahar, (4) ekor lahar. Analisis video dan pengamatan in-situ pada lahar aktif sangatmembantu pembuatan hidrograf secara rinci terkait dengan kedalaman aliran, kecepatan, debit dan jumlahbatu yang terapung. Dinamika lahar pada topografi sungai yang berbeda menimbulkan frekuensi seismikyang sangat berbeda. Proses sedimentasi lahar sangat berkaitan dengan dinamika aliran lahar dandiperlukan pengamatan in-situ untuk memvalidasi interpretasi yang dibuat
La erosión de los edificios volcánicos es el resultado de una serie de procesos geomorfológicos que ocurre durante, antes o sin erupción. Este proceso también involucra el término "lahar", un flujo rápido de la cumbre de volcán hacia el rio que contiene una mezcla de materiales volcánicos y agua con cambio espacial y temporal. La erosión de los edificios volcánicos aún es poco estudiado debido a las dificultades para la obtención de los datos en el campo y además es peligroso. Mientras, los lahares han causado 44 250 muertos desde 1600 a 2010, en el cual de 52% ha sido causado por un evento único en 1985 (Nevado del Ruiz, Colombia). Esta investigación propone un acercamiento multiescalar para entender mejor las características de erosión de los edificios volcánicos, en particular el proceso de descenso y la dinámica de lahares. La erupción del volcán Merapi (Indonesia) en 2010 fue una oportunidad para generar nuevos datos. La primera parte de esta tesis enfocada al proceso de iniciación de descenso de lahares, que fue basada en la obtención de los datos de campo y experimentos en el laboratorio. El trabajo de campo fue realizado con el objetivo de comparar una cuenca hidrográfica afectada por la erupción de 2010 y una otra cuenca natural, a través de la observación in-situ y la instrumentación geofísica en el campo. En el laboratorio, el trabajo fue realizado con 8 escenarios diferentes usando un canal artificial. La segunda parte de esta tesis fue relacionada a la dinámica de movimiento de lahares que se realizó a través del acoplamiento de vídeos y señales sísmicas. Se analizó también el proceso de sedimentación basado en la cronología de los flujos de lahares. Tres años después de la erupción del Merapi en 2010, la frecuencia de ocurrencia de lahares se disminuye. Sin embargo, la sedimentación de ceniza volcánica de otra erupción de un volcán cercano (Kelud en Java Oriental) causó un aumento significativo de la ocurrencia de lahares desde febrero de 2014. La formación de lahares también se provocó por deslizamiento de tierra que se ocurrió en la noche de 6 a 7 de diciembre de 2012, en la que los materiales se juntaron directamente a la vaguada. La dinámica de dos flujos de lahares fue observada y grabada en video el 28 de febrero y 18 de marzo 2014. Estos dos lahares se dividieron en cuatro fases: (1) flujo hiperconcentrado, (2) el pico de flujo de escombros, (3) cuerpo de lahar, (4) cola de lahar. El análisis de video y la observación in-situ de lahares activos nos han ayudado a crear los hidrogramas en detalle que muestran la profundidad del flujo, la velocidad, la descarga y el número de rocas flotadas. La dinámica de lahares en diferentes topografías del canal causó una frecuencia sísmica muy diferente. El proceso de sedimentación de lahares se correlacionó con la dinámica de flujo y se requiere una observación in-situ para validar la interpretación
Harb, Étienne Gebran. "Risques liés de crédit et dérivés de crédit." Thesis, Paris 2, 2011. http://www.theses.fr/2011PA020098.
Повний текст джерелаThe first part of this thesis deals with the valuation of credit risk. After an introductory chapter providing a technical synthesis of risk models, we model the dependence between default risks with the copula that helps enhancing credit risk measures. This technical tool provides a full description of the dependence structure; one could exploit the possibility of writing any joint distribution function as a copula, taking as arguments the marginal distributions. We approach copulas in probabilistic terms as they are familiar nowadays, then with an algebraic approach which is more inclusive than the probabilistic one. Afterwards, we present a general credit derivative pricing model based on Cherubini and Luciano (2003) and Luciano (2003). We price a “vulnerable”Credit Default Swap, taking into account a counterparty risk. We consider theCredit Valuation Adjustment (CVA) advocated by Basel III to optimize theeconomic capital allocation. We recover the general representation of aproduct with counterparty risk which goes back to Sorensen and Bollier (1994)and differently from the papers mentioned above, the payment of protectiondoes not occur necessarily at the end of the contract. We approach the dependence between counterparty risk and the reference credit’s one with the copula. We study the sensitivity of the CDS in extreme dependence cases with a mixture copula defined in terms of the “extreme” ones. By varying the Spearman’s rho, one can explore the whole range of positive and negative association. Furthermore, the mixture copula provides closed form prices. Our model is then closer to the market practice and easy to implement. Later on, we provide an application on credit market data. Then, we highlight the role of credit derivatives as hedging instruments and as risk factors as well since they are accused to be responsible for the subprime crisis. Finally, we analyze the subprime crisis and the sovereign debt crisis which arose from the U.S. mortgage market collapse as well. We then study the public debt sustainability of the heavily indebted peripheral countries of the eurozone by 2016
Assadollahi, Tejaragh Hossein. "L’impact des événements climatiques et de la sécheresse sur le phénomène du retrait gonflement des argiles en interaction avec les constructions." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAD011/document.
Повний текст джерелаClimate change and severe climatic events such as long drought/rehydration periods are at the origin of the shrinkage and swelling phenomenon in expansive soils. This phenomenon is affected by Soil-Vegetation-Atmosphere (SVA) interactions and can cause severe structural damage to lightly loaded constructions such as residential buildings. The objective of this re-search work is to simulate the in-situ behavior of the shrinkage-swelling in expansive soils in a SVA context using numerical tools. A soil-atmosphere interaction method is primarily presented along with a coupled hydro-thermal soil model. This approach was established in order to determine primarily, the natural time variable boundary conditions at the considered soil surface based on the mass and energy balance concept, and secondly to determine the spatial-temporal changes of the soil suction, water content and temperature. This approach was validated using in situ observations of monitored sites. Thereafter, the influence of the water uptake by vegetation was incorporated in the source term of the unsaturated water flow theory, using an existing root water uptake model. Subsequently, the temporal variations of the soil suction were related to the volume change behavior using a simple approach developed based on the experimental results of drying/wetting tests performed in the literature. The associated volumetric indices in the void ratio-log suction plan, along with the complementary parameters of the linear model were correlated with basic geotechnical parameters. The proposed approach was validated with in situ data provided from an experimental site. The Roaillan experimental site was instrumented in order to monitor the soil’s physical changes along with the structural behavior of the building. Comparisons between the simulated and observed soil suction, soil water content, temperature and soil movements in time and depth showed an acceptable performance of the predictions. The approach was then extended to study the influence of future climate projections (2050) on the soil’s physical variables and movements. Three RCP climate change scenarios were considered in this analysis which revealed different possible behavior in both short term and long term. Finally, the developed approach was applied to the French territory by dividing it to six different climatic regions. Different soil parameters were attributed to each of these climatic regions in order to set the reference condition. Thereafter, the influence of different external factors was analyzed on the soil movements over a chosen period. The study finally suggests the adequate actions to take for minimizing the amplitude of the shrinkage and swelling phenome-non in a SVA context
Sanadzadeh, Iran. "A Musicological Study of the Japanese Koto using Heuristic Finite Element Models." Thesis, 2019. http://hdl.handle.net/2440/124192.
Повний текст джерелаThis musicological study investigates the sound of the Japanese koto, a 13-string zither, using heuristic finite element models. It aims firstly to test a new integrated analytical approach with finite element methods; these methods have become more accessible to scholars across many disciplines including systematic musicology in recent decades. This thesis demonstrates how these methods can provide powerful analytical tools for technical studies of musical instruments as part of organological research. Secondly, it applies this method in a heuristic study of the koto to characterise its sound envelope by using a series of models; these models range from a simple box to a more complex and geometrically accurate lofted model developed as part of this study. These models permitted the continual development of the integrated analytical approach during the period of investigation. COMSOL Multiphysics®, the finite element method software used to develop the models, also enabled specialist analysis of sound from the instrument including its qualitative visual representation. Results of these models in turn were validated by comparison with the limited existing literature on the koto’s acoustics and additional physical experiments. During this process initial tests on a plank of paulownia wood were undertaken in order to understand the paulownia wood from which the koto is made. These results then informed more complex, subsequent models. Findings from the study reveal that the anisotropic nature of paulownia significantly influenced predicted resonances when compared to a simple isotropic model. Key characteristics of the koto body that help to explain the relationship between sound production and geometry of the instrument were also identified, for example, the significant influence of the curvature of the top plate and the arching down the length of the instrument on the sound envelope produced. These findings contribute to the understanding of the acoustical behaviour of the koto in particular and East Asian zithers in general. The methods identified and validated in this study also serve more broadly as a template for future organological and acoustical investigations of geometrically complex wooden musical instruments.
Thesis (Ph.D.) -- University of Adelaide, Elder Conservatorium of Music, 2020
Silva, Anaïs Andrea Forte. "Efeito do género e da idade no suporte social em adultos idosos." Master's thesis, 2009. http://hdl.handle.net/10400.12/4445.
Повний текст джерелаCom este estudo pretendeu-se verificar se existem relações de predição entre o género e a idade face ao Suporte Social (SS) junto de uma amostra de idosos autónomos e não institucionalizados, controlados para demência e depressão, residentes na Área da Grande Lisboa, (N= 240; leque etário= 65-90 anos, M= 72). Recorrendo ao LISREL8, efectuou-se a validação estrutural do Questionário de Suporte Instrumental e Emocional (QSIE; Feijão, 2009) verificando-se a existência de uma estrutura tridimensional hierárquica para o mesmo. Realizou-se também o teste de um Modelo Estrutural Preditor do SS, cujos resultados mostraram que apenas o género tem influência sobre o Suporte. Discute-se estes resultados, bem como a ausência de relação estatisticamente significativa entre a idade e o SS
ABSTRACT: In this study we set out to understand whether there was a predictable relation between Social Support (SS), gender and age on a sample of autonomous and non-institutionalized old-adults. To find out whether these two factors had any significant bearing on the amount of support, the sample of old-adults was taken from in the subarea of Lisbon (N= 240; (age group= 65-90 years, M= 72). A control for dementia and depression was previously made. Using the LISREL8 program, a structural validation of the Emotional and Instrumental Support Inventory (Feijão, 2009) was made, and it was found that there was a hierarchical tridimensional structure to the support. A Predictor Structural Model of SS was also made, which results showed that only gender seems to have an influence on support but there was found an absence of statistic value
Dickens, Paul Physics Faculty of Science UNSW. "Flute acoustics: measurement, modelling and design." 2007. http://handle.unsw.edu.au/1959.4/40607.
Повний текст джерелаVyasarayani, Chandrika Prakash. "Transient Dynamics of Continuous Systems with Impact and Friction, with Applications to Musical Instruments." Thesis, 2009. http://hdl.handle.net/10012/4723.
Повний текст джерелаGhebreab, Tesfalidet Alem. "Modelling the soil water balance and applications using a decision support system (DSSAT v3.5)." 2003. http://hdl.handle.net/10413/3579.
Повний текст джерелаThesis (M.Sc.)-University of Natal, Pietermaritzburg, 2003.
Hartig, Florian. "Metapopulations, Markets and the Individual: Refining incentive-based approaches for biodiversity conservation on private lands." Doctoral thesis, 2010. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2010012932.
Повний текст джерелаHerold, Maria. "Investigation of contaminant mass fluxes and reactive transport modelling of heterocyclic hydrocarbons at former gasworks sites." Doctoral thesis, 2009. http://hdl.handle.net/11858/00-1735-0000-0006-B2EC-8.
Повний текст джерелаKlapwijk, Jonathan Menno. "A validation of the Visual Perceptual Aspects Test using a bifactor exploratory structural equation modelling approach." Diss., 2018. http://hdl.handle.net/10500/25693.
Повний текст джерелаPsychology
M.A. (Research Psychology)
kulkarni, Milind Anant. "Small Angle Measurement Using Optical Caustics From Hollow Cylinders - Few Investingations." Thesis, 2007. http://hdl.handle.net/2005/621.
Повний текст джерелаMaguraushe, Kudakwashe. "Development of a diagnostic instrument and privacy model for student personal information privacy perceptions at a Zimbabwean university." Thesis, 2021. http://hdl.handle.net/10500/27557.
Повний текст джерелаSchool of Computing
Ph. D. (Information Systems)
Afagbegee, Gabriel Lionel. "A theoretical sociocultural assessment instrument for health communication campaigns." Thesis, 2016. http://hdl.handle.net/10500/21173.
Повний текст джерелаHealth Communication Campaigns are one of the strategies used in facing the challenges of the spread and effects of the HIV/AIDS epidemic, which is not only a health issue but also has sociocultural implications and consequences. Although there are some models and research tools available to guide the planning, designing, implementing, monitoring and evaluation of health communication campaigns, the premise of the study was on two assumptions. First, most available models that guide the planning and execution of HIV/AIDS communication campaigns do not sufficiently highlight sociocultural variables; and second, since most available models do not sufficiently emphasise sociocultural variables, the design of the instruments for the assessment of the campaigns are not sufficiently geared towards identifying and assessing sociocultural variables of the campaigns. In light of these assumptions, the study was undertaken for three reasons. Firstly, to construct a sociocultural health communication campaign conceptual model that incorporates and highlights sociocultural variables to guide the planning and implementation of health communication campaigns; particularly HIV/AIDS communication campaigns. Secondly to develop an assessment instrument for assessing the presence or absence of sociocultural variables in the planning and implementation of health communication campaigns. Thirdly to test the theoretical sociocultural assessment instrument developed in the study in an HIV/AIDS communication campaign of the Ekurhuleni Metropolitan Municipality’s HIV/AIDS Unit. The results indicated that the instrument is a functional sociocultural assessment tool that can be used to determine three main aspects. Firstly, whether or not and at what level there is/or was active involvement and participation of the target audience in the communication campaigns process. Secondly, whether or not and at what level in the planning and execution of a campaign, the sociocultural context was taken into consideration and the relevant elements of such context incorporated in the campaign process. Thirdly, whether or not and at what level relevant theories/models underpinned the whole process of the health communication campaigns in the planning, designing, implementation, monitoring and evaluation stages. The sociocultural assessment instrument, therefore, is not meant for assessing the effectiveness of health communication campaigns per se. It is rather meant for use to ascertain the presence or absence of those three aspects on the assumption that if they are taking care of in the planning and implementation of such campaigns, the probability is that the campaigns would be more socioculturally appropriate. The implications of this study are that for health communication campaigns to be socioculturally appropriate, they display continuous community interactivity and participative (ensuring mutual relationship between campaign planners and target audience) in their planning, implementation and evaluation/assessment; making the whole campaign process strategic and integrative – their management should be strategic, implementation creative and monitoring and evaluation continuous.
Communication Science
D. Litt. et Phil. (Communication)