Dissertations / Theses on the topic 'Observation vla'
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André, Philippe. "Emission radio des etoiles pre-sequence principale du nuage rho ophiuchi : observations et interpretations." Paris 6, 1987. http://www.theses.fr/1987PA066240.
Full textDyba, Tadeusz. "Precision of cancer incidence predictions based on poisson distributed observations." Helsinki : University of Helsinki, 2000. http://ethesis.helsinki.fi/julkaisut/val/tilas/vk/dyba/.
Full textKarlsson, Roland. "18-cm VLA observations of OH towards the Galactic Centre." Licentiate thesis, Stockholms universitet, Institutionen för astronomi, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-122682.
Full textFlagg, Hammargren Karin, and Helena Stålberg. "Att organisera förskolan. : En kvalitativ undersökning om yttre och inre faktorer som påverkar pedagogers val i den pedagogiska verksamheten." Thesis, Uppsala universitet, Institutionen för pedagogik, didaktik och utbildningsstudier, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-175478.
Full textAbstract The purpose of this study was to find out how external and internal factors affect the preschool teachers' work and how it is controlled from the principal down to the nursery and how these frames provide both opportunities and obstacles in the educational activities. We have used two qualitative methods, interviews and observation to provide both a sense of how factors are perceived and how it actually affects the preschool teachers' choice. It has used a phenomenographic research approach where the intention was to see how preschool teachers perceive their surrounding environment. We conducted 9 interviews divided with three preschool directors, three preschool teachers and three nannies. It has also been performed 22 minor observations on two preschools. All data collection is made in the same municipality. The result demonstrates that there are factors that affect preschool teachers' choices, but it is up to each preschool if it becomes a condition or an obstruction. It differs from preschools how to organize after the organization, finances, time, environment, and how they divide the children into group.
Johnson, Cynthia L. "A contextual approach to learning collaborative behavior via observation." Doctoral diss., University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4943.
Full textID: 029809360; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (Ph.D.)--University of Central Florida, 2011.; Includes bibliographical references (p. 305-314).
Ph.D.
Doctorate
Electrical Engineering and Computer Science
Engineering and Computer Science
Zhou, Yan Ph D. Massachusetts Institute of Technology. "Direct observation of Rydberg-Rydberg transitions via CPmmW spectroscopy." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/93038.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 295-307).
Rydberg-Rydberg transitions of BaF molecules have been directly observed in our lab. The key to the experimental success is our ability to combine two powerful and new technologies, Chirped-Pulse millimeter-Wave spectroscopy (CPmmW) and a buffer gas cooled molecular beam source. CPmmW spectroscopy is a form of broadband (20 GHz bandwidth), high-resolution (50 kHz), free induction decay-detected (FID) spectroscopy with accurate relative intensities (10%), which is successfully applied to record Rydberg-Rydberg spectra of Calcium and Barium atoms. To extend CPmmW spectroscopy to a molecular system, I have constructed a new setup, a 20 K Neon buffer gas cooled molecular beam system, which generates of beam containing >1000 times more molecules and 10 times less translational velocity than a Smalleytype laser ablation supersonic beam source. Hundreds of molecular Rydberg-Rydberg transitions with high resolution and high dynamic range can now be recorded in a few hours. The success of this experiment suggests many applications in the near future, such as developing a user-friendly experimental method to study and manipulate Rydberg molecules, preparing a single molecular beam pulse that contains 108 state-selected core-nonpenetrating Rydberg molecules/molecular ions, and studying the electronic structure (dipole and quadrupole moments and polarizability) of the molecular ion core with unprecedented precision and completeness. In addition, strong collective effects (superradiance) have also been observed.
by Yan Zhou.
Ph. D.
Ricci, L., H. Rome, P. Pinilla, S. Facchini, T. Birnstiel, and L. Testi. "VLA Observations of the Disk around the Young Brown Dwarf 2MASS J044427+2512." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/625755.
Full textTomsson, Lina, and Louise Svensson. "”Jag vill leka med min kompis”. ”Det går inte, det är ju fullt”. : En kvalitativ studie kring hur användandet av valtavlan synliggör barns delaktighet i förskolan." Thesis, Högskolan Kristianstad, Fakulteten för lärarutbildning, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-22315.
Full textRastello, Sara. "Multifrequency VLBA observations of two compact symmetric objects." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8913/.
Full textPetit, Tillys. "Caractérisation de la circulation autour, au-dessus et à travers (via des zones de fracture) la dorsale de Reykjanes." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0061/document.
Full textThe Reykjanes Ridge is a major topographic feature of the North-Atlantic Ocean that extends from Iceland to the Charlie Gibbs Fracture Zone. Located between the Iceland Basin and the Irminger Sea, the Reykjanes Ridge strongly influences the subpolar gyre circulation and is a gate toward the deep convection areas. However, the circulation and distribution across the Reykjanes Ridge has never been directly quantified such that the characterization of the connection between the Iceland Basin and the Irminger Sea is still incomplete. As part of the Reykjanes Ridge Experiment project, we were able to analyze the circulation around, above and across the Reykjanes Ridge. Mainly based on hydrographic sections along and perpendicular to the ridge axis, the aim of this PhD thesis was thus to characterize the 3-D circulation and properties of the flow along and across the Reykjanes Ridge.We started by accurately quantifying geostrophic transports across the sections, which led to improvements in the treatment of S-ADCP data. Across the Reykjanes Ridge, the intensity of the wesward branch of the subpolar gyre was estimated at21.9 + 2.5 Sv in June – July 2015 with intensifications at the Bight Fracture Zone (BFZ) and at 59 – 62°N. At the BFZ, overflow waters are influenced by the bathymetry such as their hydrological properties evolve as they cross the Reykjanes Ridge. Finally, both the bathymetry and the cyclonic horizontal circulation of the Iceland Basin regulate the evoluton of the along-ridge flows by blocking water masses, and thus shaping the water mass distribution over the Reykjanes Ridge. In addition to waters from the crossridge flow, the Irminger Current incorporates waters from the center of the Irminger Sea
Knapp, Mary (Mary E. ). "Toward detection and characterization of exoplanetary magnetic fields via low frequency radio observation." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/115642.
Full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 225-256).
Low frequency radio emission from planets is produced by the interaction of energetic charged particles from the planet's ionosphere and/or the solar wind with the planet's magnetic field. The temporal and spectral characteristics and variability of planetary radio emission encode information about a planet's magnetic field strength and morphology, rotation, and interior. This thesis describes three distinct approaches to detecting radio emission from extrasolar planets ( exoplanets). The first is a novel approach using 'big data' and computer aided discovery tools to mine radio survey images for faint radio emission from the location of nearby stars. The flexible approach described in this thesis produced upper limits of rv lOOx Jovian radio flux for a large sample of nearby stars and known exoplanet systems. The sensitivity is sufficient that large radio bursts from nearby stars or planets could have been detected if they took place during the survey observation(s). The framework developed here can be used for automated exoplanet radio emission searches in future radio survey data. The second approach described herein is a blind survey of the nearest Northern hemisphere stars across a broad range of frequencies in order to detect as-yet unknown planets or set tight constraints on radio emission from the stars and possible substellar companions. The survey approach used here is novel because it makes no assumptions about which stars are most likely to host radio emitting planets and it covers frequencies from 30 MHz to 4 GHz. This survey produced a detection of multiple rv50% circularly polarized flares from the M dwarf binary system Ross 614 as well as limits at the lOx Jovian flux level for the remaining stars observed. The limits attained from this survey are the first published at 1-4 GHz for these objects and the only available radio limits for a newly discovered cool (T9) brown dwarf. The limits from this survey place a preliminary constraint on the magnetic field of the brown dwarf at <350 G. The third approach focuses on known exoplanet systems and targets key orbital phases where intense radio emission is predicted. In the case of eccentric hot Jupiter HD 80606 b, radio flux from the planet is expected to increase by a factor of up to 3000 compared to the quiescent flux as the planet passes within 6 Rof its host at periastron due to high density stellar wind impinging on HD 80606 b's putative magnetosphere. Data obtained from LOFAR LBA is used to set the lowest limits to date on radio flux from HD 80606 b near planetary periastron. The same concept of orbital phase targeting is used to optimize an observing strategy for recently-discovered multiple planet host TRAPPIST-I. In the case of TRAPPIST-1, the quadrature phases of planets TRAPPIST-1 b and TRAPPIST-1 c are targeted to maximize the chance of observing Io-Jupiter like planetary modulation of stellar radio emission. The quadrature phase targeting approach is new to this field. The thesis concludes with a discussion of the benefits of space-based observation for exoplanetary radio searches. Ground-based observations are limited by the plasma frequency of the ionosphere, so planets with Earth-like magnetic fields cannot be observed. Telescopes on the ground also suffer from ionospheric phase errors that are difficult to fully calibrate. Space-based observation does not suffer from the effects of the ionosphere and can therefore support lower frequency observations than ground-based instruments. A novel instrument, the vector sensor, optimized for space-based radio interferometry is introduced. New algorithms for all-sky vector sensor imaging have been developed and tested in simulation and on sky data with encouraging results. Finally, the prospects for detecting Earth- or Jupiter-analogs in the solar neighborhood, either from the ground or from space, are assessed. Very large space-based arrays are required to detect either Jupiter or the Earth at 10 pc; at least 105 -106 antennas are needed for sufficient sensitivity.
by Mary Knapp.
Ph. D. in Planetary Sciences
Sancho, Maider. "The spatial distribution of metals in disc galaxies, via simulations and observations." Thesis, University of Central Lancashire, 2017. http://clok.uclan.ac.uk/20925/.
Full textKasaba, Yasumasa. "Study of Radio Waves in Geospace via Spacecraft Observations and Numerical Simulations." Kyoto University, 1997. http://hdl.handle.net/2433/154674.
Full textKyoto University (京都大学)
0048
新制・課程博士
博士(工学)
甲第6871号
工博第1622号
新制||工||1069(附属図書館)
UT51-97-H255
京都大学大学院工学研究科電子工学専攻
(主査)教授 松本 紘, 教授 橋本 弘藏, 教授 津田 敏隆
学位規則第4条第1項該当
Usov, Y., C. Z. Yuan, C. P. Shen, P. Wang, X. L. Wang, I. Adachi, H. Aihara, et al. "Observation of e^+e^- → K^+K^-J/Ψ via initial-state radiation at Belle." American Physical Society, 2008. http://hdl.handle.net/2237/11349.
Full textOlive, Jean-François. "Observation de l'émission gamma émise par trois pulsars : le Crabe, Vela et AO535+26." Toulouse 3, 1992. http://www.theses.fr/1992TOU30266.
Full textBonnefoy, Cyril. "Observation et modélisation spatiale de la température dans les terroirs viticoles du Val de Loire dans le contexte du changement climatique." Phd thesis, Université Rennes 2, 2013. http://tel.archives-ouvertes.fr/tel-00815596.
Full textKojima, Hirotsugu. "Study on the Plasma Waves in the Geomagnetic Tail Region via Spacecraft Observations." Kyoto University, 1998. http://hdl.handle.net/2433/77879.
Full textRuppin, Florian. "Cosmologie via les observations d'amas de galaxies par effet Sunyaev-Zel'dovich avec NIKA2." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY029/document.
Full textThe mass distribution in the Universe, as traced by galaxy clusters is a powerful cosmological probe. The characterization of the processes associated with the origin and the growth of the large scale structures enables constraining cosmological parameters by studying the distribution of clusters according to their mass and redshift. However, a tension is observed between the cosmological constraints established by the study of the primary anisotropies of the cosmological background and those resulting from the analysis of the distribution of galaxy clusters. This may imply that our cosmological model is incomplete. The observation of clusters from the Sunyaev-Zel'dovich (SZ) effect allows us to constrain their gas pressure. This observable can be directly linked to the mass of galaxy clusters via a scaling relation and a pressure profile. It is thus essential to characterize the latter precisely in order to limit the potential bias and systematic effects affecting cosmological analyses. This thesis presents the work carried out to this end. It covers topics ranging from SZ observations made with the NIKA2 camera installed at the IRAM 30-metre telescope to the estimation of cosmological parameters, and including the analysis of NIKA2 raw data and the SZ maps produced.Part of the thesis work presented in this document is dedicated to the study and the improvement of the different tasks carried out, from the observations of galaxy clusters with the NIKA2 camera to the production of maps of the SZ effect. The procedures developed to estimate the NIKA2 instrumental performance are detailed and the analysis pipeline used to analyze the raw data is presented.The work carried out in this thesis also consisted in characterizing the thermodynamic properties of galaxy clusters using joint analyzes that combine the NIKA2 SZ maps with X-ray data measured by the XMM-Newton satellite. We detail the methods used in the SZ data processing software created for the NIKA2 SZ large program, the non-parametric deprojection procedure developed to characterize the pressure profile of galaxy clusters and the results of the first SZ observation with NIKA2.The last activities presented are dedicated to the analyses carried out to quantify the impact of the NIKA2 SZ large program on cosmology. We analyze the effect of dynamic disturbances of the intracluster medium on the characterization of the pressure profile with NIKA2 via the use of clusters from the MUSIC N-body simulation. Finally, we detail the study realized in order to estimate the impact of a modification of the universal pressure profile on the estimation of cosmological parameters derived from the power spectrum of the SZ effect measured by Planck
Kim, Rhae Sung. "Estimating snow depth of alpine snowpack via airborne multifrequency passive microwave radiance observations." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503071052341111.
Full textShin, Koichi. "Study on electrostatic waves in the terrestrial bow shock region via spacecraft observations." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/136234.
Full textKarimi, Fawad [Verfasser]. "Towards Realtime Observation of Interatomic Coulombic Decay via XUV Pump - THz Probe Streaking / Fawad Karimi." München : Verlag Dr. Hut, 2019. http://d-nb.info/1190421941/34.
Full textHjort, Simon. "Kritiskt tänkande i klassrummet : En studie av didaktiska val och manifesterat kritiskt tänkande i samhällskunskaps- och filosofiundervisning." Licentiate thesis, Linköpings universitet, Pedagogik och didaktik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-112594.
Full textToris, Russell C. "Spatial and Temporal Learning in Robotic Pick-and-Place Domains via Demonstrations and Observations." Digital WPI, 2016. https://digitalcommons.wpi.edu/etd-dissertations/135.
Full textPointecouteau, E. "Contribution à l'étude des propriétés physiques du milieu intergalactique via les observations infrarouges, submillimétiques et millimétriques." Phd thesis, Université Paul Sabatier - Toulouse III, 1999. http://tel.archives-ouvertes.fr/tel-00330404.
Full textMEI, SIMONA. "Mesures de distance par fluctuations de brillance de surface avec le vlt : predictions theoriques et observations." Université Louis Pasteur (Strasbourg) (1971-2008), 1999. http://www.theses.fr/1999STR13158.
Full textChambre, Damien. "Contribuer volontairement au bien public en groupe élargi : évolution via le triptyque observation, explication, représentation sur fond d'un classique." Thesis, Paris 1, 2016. http://www.theses.fr/2016PA01E018/document.
Full textWe capture decision-making to voluntarily contribute to public good in small and large group, based on a Classic in experimental economics. Contrary to forecasts, decision-making is negatively correlated with Marginal Per Capita Return to investing in the public group in large group. Subjects appear to view the issue as weak. Decision-making is positively correlated, but too weakly, with number of subjects in small group and is not correlated in large group. Decision-making is always negatively correlated with game process, but without convergence to the dominant strategy. The method used in calculating compensation can have an impact. Reciprocity and aversion to inequity are always missing. This can be linked to the fact that subjects are not representative of the true population. In line with forecasts, two properties of public investment emerge and are consistent with decision-making of everyday life. Decision-making is negatively correlated with Marginal per Capita Return in small group, following logic of this incentive to contribute. There are signs of altruism in small group disappearing in larger group, disadvantaged by dilution of Giving. Presence of Warm-Glow Giving increases in large group, supported by changing nature of Giving. We model these results using the Logit equilibrium. It is noisy response functions including different components. Function’s properties properly meet decision-making and have advantage of not modeling some empirical contradictions
Choi, Indae. "Fabrication of wavy type porous triple-layer SC-SOFC via in-situ observation of curvature evolution during co-sintering." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/18668.
Full textTran, Ngoc Khue. "Propriété LAN pour des processus de diffusion avec sauts avec observations discrètes via le calcul de Malliavin." Thesis, Paris 13, 2014. http://www.theses.fr/2014PA132008/document.
Full textIn this thesis we apply the Malliavin calculus in order to obtain the local asymptotic normality (LAN) property from discrete observations for certain uniformly elliptic diffusion processes with jumps. In Chapter 2 we review the proof of the local asymptotic mixed normality (LAMN) property for diffusion processes with jumps from continuous observations, and as a consequence, we derive the LAN property when supposing the ergodicity of the process. In Chapter 3 we establish the LAN property for a simple Lévy process whose drift and diffusion parameters as well as its intensity are unknown. In Chapter 4, using techniques of the Malliavin calculus and the estimates of the transition density, we prove that the LAN property is satisfied for a jump-diffusion process whose drift coefficient depends on an unknown parameter. Finally, in the same direction we obtain in Chapter 5 the LAN property for a jump-diffusion process where two unknown parameters determine the drift and diffusion coefficients of the jump-diffusion process
O'Rourke, Keith. "The combining of information : investigating and synthesizing what is possibly common in clinical observations or studies via likelihood." Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443045.
Full textYung, Hong-kiu Bosco, and 容康喬. "VLBA observations and kinematic modelling of the high velocity molecular jets from the water fountain IRAS 18286-0959." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B45847848.
Full textPaz, Arribas Manuel. "Estimation of trigger rates, data rates and data volumes for CTA and observations of SNR RX J0852.0−4622 with H.E.S.S." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18056.
Full textThis work focuses on two different aspects of gamma-ray astronomy. On the one hand, it studies the instrumental challenge posed by the future CTA Observatory by estimating the amount of data to be collected. Based on an analysis of simulated data, the more demanding southern array is expected to have an array trigger rate of 13 kHz, a data rate of up to 2500 MB/s and a data volume after 15 yr of operation and assuming a duty cycle of 15% of up to 165 PB. The design of the data acquisition and storage systems will be a challenge but should be manageable with existing technologies. On the other hand, it studies supernova remnants, by presenting analysis results of the gamma-ray data of the RX J0852.0-4622 supernova remnant (commonly known as Vela Junior) measured with the operating H.E.S.S. experiment and interpreting them in order to check the plausibility of RX J0852.0-4622 being a cosmic ray accelerator. The more precise measurements permit a better determination of the parent particle population properties with respect to previous publications. More precisely, a clear curvature of the spectrum of RX J0852.0-4622 is measured with an exponential energy cut-off at 7.2 TeV. Finally, the analysis of simulated data shows that CTA should be able to significantly improve the determination of the spectral energy cut-off of RX J0852.0-4622, which should help in identifying the nature of the gamma-ray emission.
Hohlweger, Bernhard [Verfasser], Laura [Akademischer Betreuer] Fabbietti, Laura [Gutachter] Fabbietti, and Lothar [Gutachter] Oberauer. "First observation of the p–Ξ ̄ interaction via two-particle correlations / Bernhard Hohlweger ; Gutachter: Laura Fabbietti, Lothar Oberauer ; Betreuer: Laura Fabbietti." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1226934374/34.
Full textDubois, Florent. "L'astronomie γ de très haute énergie avec H. E. S. S. : Développement d'une analyse multi-variables et application à l'étude de nébuleuses de pulsar." Chambéry, 2009. http://www.theses.fr/2009CHAMS050.
Full textH. E. S. S. (High Energy Stereoscopic System) is one of the leading systems of four Imaging Atmospheric Cherenkov Telescopes that investigates very high energy (VHE) cosmic γ-rays in the 100 GeV to 100 TeV energy range. H. E. S. S. Is located in Namibia, near the Gamsberg mountain and operational since December 2003. The H. E. S. S. Experiment is mainly aimed to the observation of the southern sky including the galactic plan and the numerous astrophysics sources therein. Three analysis methods have been developed using various properties of the electromagnetic showers generated by the interaction of primary cosmic γ-rays within the Earth atmosphere. The first goal of this thesis was to combine the information from these methods for the selection and the energy and direction reconstruction of γ-ray events. The new analysis called Xeff improves significantly the quality of the selection and the precision of the reconstruction. This analysis has been afterwards applied to the study of pulsar wind nebulae like Vela X, GO. 9+0. 1 and MSH 15-52. New results were found concerning the source extension (Vela X) or spectral analysis (GO. 9+0. 1 and MSH 15-52) at TeV energies, thanks to additional data and to the improved efficiency of the new method. In 2010, a new phase will begin with the achievement of a fifth telescope dedicated to γ-ray observation from tens GeV. The calibration processes of the photomultipliers equipping the camera of the new telescope, as well as the results of the tests, are also described in this thesis
Baumgartner, Wayne. "Elemental abundances via X-ray observations of galaxy clusters and the InFOC[mu]S [i.e. InFOCuS] hard X-ray telescope." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1387.
Full textInFOCuS on t.p. of PDF has the Greek letter for MU instead of u. Thesis research directed by: Astronomy. InFOCuS in PDF has the Greek letter for mu instead of u. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
SILVA, NETO Gival Pordeus da. "Testando a robustez na determinação da constante de hubble, H0, via observáveis em redshifts intermediários." Universidade Federal de Campina Grande, 2015. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1988.
Full textMade available in DSpace on 2018-10-16T19:37:30Z (GMT). No. of bitstreams: 1 GIVAL PORDEUS DA SILVA NETO – DISSERTAÇÃO (PPGFísica) 2015.pdf: 4886479 bytes, checksum: 8589cc7f91d5dab59210f3bf9b9a3d97 (MD5) Previous issue date: 2015-05-08
Capes
A constante de Hubble (H0) é considerada fundamental na cosmologia. Ela é crucial para qualquer modelo cosmológico moderno, pois está relacionada com diversas grandezas cosmológicas, portanto, é de extrema importância a determinação mais restritiva e acurada possível do seu valor. A mais recente estimativa de H0 a partir de métodos locais (z 1), H0 = 73:8 2; 4 kms1Mpc1, e a partir de redshifts muito altos (z ' 1070), H0 = 67; 3 1; 2 kms1Mpc1, são discrepantes em um nível de con fiança de 2; 4 . Dentro deste contexto, Lima e Cunha (LC), a m de lançar alguma luz sobre este problema, derivou uma nova determinação de H0 utilizando quatro testes cosmológicos em redshifts intermediários (z 1), com base no chamado modelo CDM Plano. Eles obtiveram H0 = 74; 1 2; 2 kms1Mpc1, em pleno acordo com as medições locais. Neste trabalho, exploramos a robustez do resultado de LC, procurando por erros sistemáticos e a sua dependência com o modelo cosmológico usado. Nós constatamos que o valor H0 a partir desta análise conjunta é muito fracamente dependente de modelos cosmológico, mas a morfologia adotada para inferir o raio central dos aglomerados de galáxias, altera o resultado, sendo a principal fonte de erros sistemáticos. Concluímos que uma melhor compreensão da morfologia dos aglomerados é fundamental para transformar esse método em um poderoso estimador de H0.
The Hubble constant (H0) is considered a fundamental constant of cosmology. It is crucial for any modern cosmological model, it is related to various cosmological quantities, so it is extremely important a restrictive and accurate determination of its value. The most recent estimate of H0 from local observations (z 1), H0 = 73:8 2; 4 kms�1Mpc�1, and from high redshifts (z ' 1070), H0 = 67; 3 1; 2 kms�1Mpc�1, are discrepant in a con dence level of 2; 4 . Within this context, Cunha and Lima (LC), in order to shed some light on this problem, derived a new determination of H0 using four cosmological tests at intermediate redshifts (z 1), based on the model called Flat CDM. They obtained H0 = 74; 1 2; 2 kms�1Mpc�1, in full agreement with local measurements. In this work, we explore the robustness of the result LC looking for systematic errors and its dependence on the cosmological model used. We found that the H0 value from this combined analysis is very weakly dependent on the underlying cosmological model, but the morphology adopted to infer the core radius of galaxy clusters, changes the estimates being the main source of systematic errors. Hence, we conclude that a better understanding of the morphology of the clusters is essential to transform this method in a powerful cross-check to H0.
Hultberg, Ingridz Kristine. "”Utvecklas i sin egen takt” En aktionsforskningsstudie om förskolepedagogers reflektioner kring sina val och handlanden ”Develop at one ́s own pace” An action research study on preschoolteachers reflections about their choices and actions." Thesis, Malmö högskola, Fakulteten för lärande och samhälle (LS), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-32949.
Full textJayawardena, Vajira Parakrama. "Observations on the Ruminal Protein Degradation Products and the Absorption of Ruminally Derived Free and Peptide-Bound Amino Acids via Ovine Forestomach Epithelia in Vitro." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/29590.
Full textPh. D.
Ramirez, Amaro Karinne [Verfasser], Gordon [Akademischer Betreuer] Cheng, Michael [Akademischer Betreuer] Beetz, and Tetsunari [Akademischer Betreuer] Inamura. "Inferring Human Activities from Observation via Semantic Reasoning : A novel method for transferring skills to robots / Karinne Ramirez Amaro. Gutachter: Michael Beetz ; Tetsunari Inamura ; Gordon Cheng. Betreuer: Gordon Cheng." München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/1070624233/34.
Full textRamirez, Amaro Karinne Verfasser], Gordon [Akademischer Betreuer] Cheng, Michael [Akademischer Betreuer] [Beetz, and Tetsunari [Akademischer Betreuer] Inamura. "Inferring Human Activities from Observation via Semantic Reasoning : A novel method for transferring skills to robots / Karinne Ramirez Amaro. Gutachter: Michael Beetz ; Tetsunari Inamura ; Gordon Cheng. Betreuer: Gordon Cheng." München : Universitätsbibliothek der TU München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:91-diss-20150402-1230789-1-9.
Full textTavernier, Thomas. "Une quête de l'émission du pulsar de Vela aux hautes et très hautes énergies : observation, détection et étude, du GeV et TeV (GeV) avec le satellite Fermi et les télescopes à imagerie Tcherenkov H.E.S.S." Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCC257.
Full textThe thesis presented in this manuscript is devoted to the study of bright pulsars shilling in -y-rays, at energies ranging from 100 MeV to several TeV. It is based on data from the LAT instrument aboard the Fermi satellite, as well as those obtained with the ground-based system of Cherenkov telescopes, H. E. S. S. , * installed in Namibia. The phased-resolved spectral measurements of pulsars with the Fermi-LAT, and in particular that of Vela (PSR B0835-45) constitutes the first step of this work. The development of an analysis method dedicated to the fifth and the largest H. E. S. S. Telescope has enabled us to detect the pulsed emission of PSR B0835-44 from ground, starting as low as 10 GeV on, and then to measure its spectrum. The very good agreement with the results obtained from the LAT data demonstrates the validity of the numerical model of the telescope and of the methodology. This is the first pulsar detected by H. E. S. S. , and the lowest energy threshold reached in Cherenkov astronomy as of today. In a third step, the analysis of data obtained on Vela with all H. E. S. S. Telescopes has resulted in an indication of a pulsed signal in the TeV range from PSR B0835-45, at a good level of confidence (4. 5 standard deviations). The spectral evaluation shows that this signal, if confirmed, represents a second component. A quick and simple study shows that this component could result from inverse Compton scattering of leptons in the pulsar wind, accelerated to ultra-relativistic energies beyond the light cylinder, on neutron star's thermal X-ray photons. These results open the perspectives for pulsar physics at tens of GeV and especially above TeV energies with the future CTA observatory
Gosselin, Sebastien, and Arby Shahmoorad. "Integration i ämnet idrott och hälsa. : En kvalitativ undersökning via observationer och intervjuer av lärare som arbetar i skolor där majoriteten av eleverna har utländsk bakgrund." Thesis, Uppsala universitet, Institutionen för pedagogik, didaktik och utbildningsstudier, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-175706.
Full textBoni, Sébastien. "Observation in vitro de la modulation de l'activité traductionnelle de l'IRES du virus de l'hépatite C par certains facteurs viraux et mise au point d'un système d'étude cellulaire de son activité via un vecteur lentiviral." Paris 6, 2006. http://www.theses.fr/2006PA066446.
Full textColeiro, Alexis. "Formation, évolution et environnement des binaires X de grande masse." Phd thesis, Université Paris-Diderot - Paris VII, 2013. http://tel.archives-ouvertes.fr/tel-00943762.
Full textBonnevie, Tristan. "Nouveaux outils et optimisation des outils existants pour la réhabilitation respiratoire et la ré-autonomisation des patients atteints d'un handicap ventilatoire. Chronic obstructive pulmonary disease Six-minute stepper test to set pulmonary rehabilitation intensity in patients with COPD - a retrospective study Can the six-minute stepper test be used to determine the intensity of endurance training in early stage COPD : a multicenter observational study The six-minute stepper test is related to muscle strength but cannot substitute for the one repetition maximum to prescribe strength training in patients with COPD People undertaking pulmonary rehabilitation are willing and able to provide accurate data via a remote pulse oximetry system : a multicentre observational study Mid-term effects of pulmonary rehabilitation on cognitive function in people with severe chronic obstructive pulmonary disease NIV is not adequate for high intensity endurance in COPD Home-based neuromuscular electrical stimulation as an add-on to pulmonary rehabilitation does not provide further benefits in patients with chronic obstructive pulmonary disease : a multicenter randomized trial Lumbar transcutaneous electrical nerve stimulation to improve exercise performance in COPD patients Advanced telehealth technology improves in-home pulmonary rehabilitation for people with stable chronic obstructive pulmonary disease : a systematic review Nasal high flow for stable patients with chronic obstructive pulmonary disease : a systematic review and meta-analysis." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR024.
Full textPulmonary rehabilitation (PR) is recommended in the management of subjects with ventilatory impairment to improve their quality of life. Although a large body of evidence support its use, only few subjects benefit from it and the optimal training modality has not been determined yet. In this context, the use of new and existing tools to optimize access as well as the effects of the program are major developments that deserve to be studied. As part of this thesis, we sought to explore these two major issues (1) by considering a rehabilitation model relocated outside the PR centres while assessing the obstacles to this model and (2) exploring the effectiveness of different add-on to PR in further optimizing the benefits of the program. In the first part, we have shown, through several retrospective studies and an original prospective multicentre contribution, that the six-minute stepper test can be used to prescribe endurance training, particularly for those patients with a mild to moderate chronic obstructive pulmonary disease (COPD), but not to prescribe muscle strengthening. Furthermore, we have shown in a cohort of 105 subjects referred for PR that the use of a remote tele monitoring device was feasible, valid and widely accepted. Finally, we explored the prevalence of cognitive dysfunction, another systemic impairment of COPD that could compromise the relocation of the program, and showed that it was a very common condition (around 75% of the subjects) but that it could improve following PR and did not seem to influence the use of a remote tele monitoring device. In the second part, we evaluated the effects of different add-on used to potentiate the benefits of the PR program. In a cross-over study of 21 COPD patients, we showed that non-invasive ventilation did not improve endurance exercise capacity due to technological limitation of the ventilator. Through a multicentre randomized controlled study carried out in 73 patients with severe to very severe COPD, we have shown that neuromuscular electrical stimulation at home, performed in addition to a PR program, did not provide further benefits on quality of life or exercise capacity. Finally, through a randomized cross-over double-blind study carried out in 10 patients, we were unable to show the effectiveness of transcutaneous nerve electrical stimulation in improving their endurance exercise capacity. Finally, in a last part, we highlighted the research currently carried out in our laboratory following the original contributions described during this thesis, as well as new area of research in order to pursue the themes explored. Thus, two systematic reviews and meta-analysis (the first about nasal high flow therapy in subjects with stable COPD and the second about the use of advanced telehealth technologies to deliver PR) will serve as a basis for future research
"Multifrequency observations of quasars css using the vlba." Tese, Biblioteca Digital de Teses e Dissertações da UFSM, 2006. http://coralx.ufsm.br/tede/tde_busca/arquivo.php?codArquivo=696.
Full textRudy, Donald James. "Mars: High Resolution VLA Observations at Wavelengths of 2 and 6 cm and Derived Properties." Thesis, 1987. https://thesis.library.caltech.edu/7484/1/Rudy%201987.pdf.
Full textObservations of Mars at wavelengths of 2 and 6cm were made using the VLA in its A configuration. Two seasons were observed; late spring in the northern hemisphere (LS ~ 60°) and early summer in the southern summer (LS ~ 300°). The sub-earth latitudes were 25°N and 25°S, for each of these seasons respectively. So the geometry for viewing the polar region was optimal in each case. Whole-disk brightness temperatures were estimated to be 193.2 K ± 1.0 at 2 cm and 191.2 K ± 0.6 at 6 cm for the northern data set and 202.2 K ± l.0 at 2 cm and 195.4 K ± 0.6 at 6 cm for the southern data set (formal errors only). Since measurements of the polarized flux were taken at the same time, whole-disk effective dielectric constants could be estimated and from these, estimates of sub-surface densities could be made. The results of these calculations at 2cm yielded whole-disk effective dielectric constants of 2.34 ± 0.05 and 2.02 ± 0.03 which imply sub-surface densities of 1.24 g cm-3 ± 0.06 and 1.02 g cm-3 ± 0.05 for the north and south, respectively. The same calculations at 6 cm yielded effective densities of 1.45 g cm-3 ± 0.10 and 1.31 g cm-3 ± 0.07 from effective dielectric constants of 2.70 ± 0.09 and 2.48 ± 0.06 for the north and south data sets, respectively.
From the mapped data these parameters were also estimated as a function of latitude between latitudes of 15°S and 60°N for the north data set; and between latitudes of 30°N and 60°S for the south data set. A region in which the brightness temperature behaves in an anomalous manner was discovered in both data sets. This region lies between about 10°S and 40°S. Here the brightness temperatures at both wavelengths in both data sets appears lower, by 4 K to 8 K, than a nominal model would predict. In addition to the effective dielectric constant and sub-surface density the radio absorption length of the sub-surface was estimated. The radio absorption length for most of these latitudes was about 15 wavelengths with formal errors on the order of 5 or 10 wavelengths. This is true for both data sets. The estimation of the effective dielectric constant at most latitudes was between 2 and 3.5 with only slight differences between the two different wavelengths. The two data sets show the same relative trends, but are off by a scaling factor.
These estimates of the dielectric constant lead to estimation of the sub-surface densities as a function of latitude. Most calculations of the sub-surface density yielded results between 1 and 2 g cm-3 with errors on the order of 0.5 g cm-3. These results seem to imply that the sub-surface is not much different than the surface as observed by the Viking and Mariner missions. In line with this, an examination of the correlation of the dielectric constant at each wavelength with the thermal inertia, determined by the Viking infrared measurements, shows a relatively strong correlation, at both wavelengths, for the North data set. The South data set, however, shows little to nocorrelation between the radio parameters and the thermal inertia. Since the South data set is primarily composed of latitudes which contain the anomalous region, it is not suprising that the South data set shows no correlation.
In addition, the thermal-radiative model used to estimate the above parameters was used to estimate the variability of the whole-disk brightness temperature of Mars. This was done in an effort to establish a background for those astronomers wishing to use Mars as a calibration source. The parameters investigated for their effect on the whole-disk brightness temperature of Mars were: the sub-earth longitude, the sub-earth latitude, the sub-earth time of day, the dielectric constant, and the radio absorption length. A nominal model was first created which established the variation of the brightness temperature as a function of season and radio absorption length. A nominal value of 2.2 was used for the dielectric constant, and the sub-earth latitude was set at 0°N and the sub-earth longitude was set at 75°W. The sub-earth time of day was held at noon for this nominal model. This is equivalent to a 0° phase angle. The most important geometric factor was the sub-earth latitude. The error in estimating the whole-disk brightness temperature of Mars by using the wrong sub-earth latitude can be as large as 5 to 10%. The charts presented will be useful to estimate the whole-disk brightness temperature which the thermal model would predict. It is believed that the error in this estimate is less than or equal to 5 K.
Chen, Shih-Yun, and 陳詩芸. "“Our Nanguan Story”- The Observation on Inherited Nanguan via A Documentary." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/mp55qc.
Full text國立臺南藝術大學
音像紀錄與影像維護研究所
105
I participated in the “Tainan Nan Sheng Group Spring Music Festival” in 2015. And followed with attending some lessons taught by music teacher Chang Bo-Chung, this has led me to join the “Tainan Municipal Sishu Elementary School Nanguan Team”. With further studies about the “Nanguan” music, I came to know there is a long history of this beautiful Chinese classical music, which is in its neglected stage but do existed some 200~300 years in Taiwan. Nanguan music related stories were told throughout the years, and begun from receiving the honor of “Ching guests before the Emperor“, named by Kang Hsi in the Ching Dynasty, meaning the kind of music that can be played in front of the king. Furthermore, the oral history from teacher Chang, together with his records about the Nanguan music, as well as the creation process of "Our Nanguan Story" documentary had all become preservation of this intangible cultural asset. I always believe that finally the documentary has to face all the subjects and its audiences, so I focused my shooting on how this inherit will pass on to the children? How the children accepted the pieces? And how they look about the Nanguan music? But what fascinates me most derived from their mentoring friendship. The “Nanguan Music Life History” part raised by teacher Chang is yet to complete, and will be added to the paper for use in future research. Through the birth of my paper and "Our Nanguan Story" documentary, I hope to retain the cultural value of the traditional Nanguan music, and to provide a new reference for related researches in the future.
Cheng, Kai-Yueh, and 鄭凱岳. "Flow Pattern Observation via Particle Image Velocimetry for Enhanced Coanda Effect." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/kdr3h2.
Full text國立交通大學
機械工程系所
105
This thesis studies the difference of flow pattern in free jet and wall jet. In the wall jet, the airflow will entrain air from surrounding and a lower pressure on the wall side will deflect the jet flow pattern. The effect will limit the spreading angle and slow down the velocity decay, which is known as the Coanda effect. In this study, some designs such as elevation angle of tube and a baffle between jet and wall for enhanced Coanda effect are examined. The centerline velocity decay coefficient (K–value) is presented using an analysis of the flow pattern via particle image velocimetry. The result shows that the K-value of the wall jet can be estimated by multiplying 1.1 relative to that of a free jet. When the elevation angle is 5° with the gap between tube and wall is 2 cm and the elevation angle is 10° with the gap is 4 cm, the K-value shows the maximum and can be estimated by multiplying 1.2~1.4 with that of a free jet. When setting up a baffle between jet and wall, the results show a beneficial outcome for the spreading angle from is appreciably reduced from the flow pattern observation. In summary, the wall jet outperforms free jet as far as spreading flow pattern is concerned. In addition, there also has an opportune gap for each elevation angle of the jet.
Zhang, Jia Wei, and 張家瑋. "Observation of Focused Ultrasound Induced Transient Vessel Dilation/ Contraction via Optical Coherence Tomography." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/a97496.
Full textRomine, Glen Scott. "Improving storm-scale analyses of convection via assimilation of polarimetric radar observations /." 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3314874.
Full textSource: Dissertation Abstracts International, Volume: 69-05, Section: B, page: 2857. Adviser: Robert Wilhelmson. Includes bibliographical references (leaves 233-247) Available on microfilm from Pro Quest Information and Learning.