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Dissertations / Theses on the topic 'Giant reed'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Owoyomi, Olumuyiwa A. "Eradication of the giant reed (arundo donax) : an evaluation of different methodologies." Scholarly Commons, 2009. https://scholarlycommons.pacific.edu/uop_etds/714.

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The invasion of riparian habitats by the exotic plant, Arundo donax L., commonly known as the giant reed is one of the greatest threats to ecosystems in Central and Southern California. There have been several efforts to eradicate this plant with varying control methods. This study evaluated some previously known techniques of controlling the giant reed in addition to some novel methodologies to determine the most effective approach. The study site is a section of the Lower Calaveras River that transects University of the Pacific's campus and is a prime example of the devastation caused by the

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2

Macias, Raymond A. "Ovipositional cues for a galling wasp, Tetramesa romana, on giant reed (Arundo donax)." Thesis, California State University, Long Beach, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10254696.

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<p> <i>Arundo donax</i> is a rhizomatous perennial grass that invades riparian habitats and replaces native riparian vegetation. The galling wasp, <i> Tetramesa romana</i> (Hymenoptera: Eurytomidae), was selected for evaluation as a biocontrol agent of <i>A. donax</i> in 2009. However, knowledge is scarce on which factors influence host selection and oviposition in <i> T. romana.</i> Through my observations I documented distinct behavioral steps preceding emergence leading to oviposition in <i>T. romana,</i> and elicited an investigatory response in <i>T. romana</i> from plant volatiles extrac

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3

Yamaç, S. S. "DEVELOPMENT AND EVALUATION OF A DETAILED, PROCESS-BASED CROP MODEL FOR GIANT REED." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/232863.

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The aim of the thesis is the development of a process-based model for the simulation of giant reed growth and productivity under a variety of climatic and management conditions. Arundo donax L. (giant reed) is a perennial C3 grass native to Asia and naturalized to the Mediterranean area. Being part of the second generation biofuel crop (i.e., non-food, cellulosic biomass feedstock for ethanol or combustion), Arundo d. is characterized by high yield potential with low requirements in terms of soil, fertilizers, and water. Therefore giant reed is attracting interest as an alternative energy sou

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4

Valli, Fabio <1984&gt. "Physical Mutagenesis in Giant Reed (Arundo Donax L.) and Phenotypic and Genomic Characterization of Mutagenized Clones." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amsdottorato.unibo.it/8196/1/Fabio%20Valli%20tesi%20dottorato.pdf.

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ABSTRACT Giant reed (Arundo donaxL.) is a C3 perennial, warm-season, rhizomatous grass of emerging interest for bioenergy and biomass-derivatives production, and for phytoremediation. We developed and applied a mutagenesis protocol based on γ-irradiation of in-vitro cell cultures from which regenerants were obtained. Based on a radio-sensitivity test, the irradiation dose reducing to 50% the number of regenerants per callus (RD50) was estimated at 35 Gy. A large mutagenic experiment was carried out by irradiating a total of 3,120 calli with approx. 1x, 1.5x and 2x RD50. A total of 1,004 regen

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5

PIGNA, GAIA. "DEVELOPING TOOLS FOR ACCELERATING THE DOMESTICATION OF TWO PROMISING BIOFUEL CROPS: ARUNDO DONAX (GIANT REED) AND PANICUM VIRGATUM (SWITCHGRASS)." Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/460351.

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The need for energy and the unsustainability in the long term of fossil fuels encouraged the quest for more environmental-friendly energy sources. One alternative is exploiting plants to produce biofuels. The screening of many perennial grasses suggested Miscanthus (Miscanthus spp), Arundo (Arundo donax), and reed canary grass (Phalaris arundinacea) in Europe and switchgrass (Panicum virgatum) in both Europe and US as good candidates for bioenergy production. This thesis focuses on two of these plants: Arundo and switchgrass. Both plants already show a good agronomic performance, but th

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6

Rüggeberg, Markus [Verfasser], and Thomas [Akademischer Betreuer] Speck. "The mechanical and structural design of tissue interfaces in the Mexican Fanpalm (Washingtonia robusta) and the Giant Reed (Arundo donax)." Freiburg : Universität, 2009. http://d-nb.info/1241042918/34.

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7

Sidella, Sarah. "Adaptability, Biomass Yield, and Phytoremediation of Arundo donax L. on marginal lands: salt, dry and lead-contaminated soils." Doctoral thesis, Università di Catania, 2014. http://hdl.handle.net/10761/1605.

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Water shortage, especially during spring and summer seasons, is the main limiting factor the crop production (Araus et al, 2002; Passioura, 1977), moreover, in the Mediterranean area, inadequate irrigation practices may also exacerbate the problem of the soil salinity. The pollution of soils due to accumulation of heavy metals is a global problem that may involve the loss of agricultural areas: contaminated land is no longer suited to farming, and may be especially harmful to the entire ecosystem (Alloway, 1995). Plants tolerant to heavy metals, may be used to enhance sites unsuitable for biom

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Coppolino, Francesco Saverio. "Prove di caratterizzazione meccanica della canna comune (Arundo Donax) in prospettiva di un uso strutturale sostenibile." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20173/.

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L’obiettivo di questa tesi è porre le basi dell’utilizzo dell’Arundo Donax in campo strutturale estendendo la conoscenza del suo comportamento meccanico attraverso una completa caratterizzazione meccanica. La canna comune vanta delle caratteristiche meccaniche molto simili a quelle di diverse specie di Bambù, materiale ampiamente utilizzato nei paesi dell’Asia orientale e dell’America Latina, dove è inserito nelle normative che ne regolarizzano l’utilizzo ai fini strutturali. La principale norma di riferimento per il bambù è la ISO 22157 (2019), che descrive le procedure di prova da seguire in

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9

Karlsson, Axel, and Pinthira Fagerström. "Blue Growth : Applications and properties of biochar made out of reed." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297368.

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The climate on earth keeps getting warmer where heat waves, eutrophication, rising sea levels, extreme weather like flooding, droughts and wildfires are an expanding problem. The focus of this bachelor thesis is to determine the potential of mitigating eutrophication and while contributing to blue growth by harvesting and make use of reeds like Phragmites australis and Arundo donax. Reeds have the ability to quickly absorb nutrients from aquatic environments and there are opportunities to use them as a feedstock for producing biochar to be potentially used in areas such as soil improvement, fo

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Maxfield, Jason Charles. "Agricultural Management Decisions Impact Isoprene Emission and Physiology of Arundo donax, an Emerging Bioenergy Crop." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/1642.

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Arundo donax (Giant Reed) is quickly being developed as a rapidly-growing, robust, and highly productive bioenergy crop, with large scale cultivation of this species planned for the Columbia River basin of the Pacific Northwest (USA). Despite its potential as a next generation biomass crop, relatively few studies have examined the physiological performance of A. donax under agricultural conditions. Unlike traditional crops, A. donax is known to be a high-emitter of the volatile compound isoprene, which may significantly impact regional air quality, but it has not been widely cultivated in Nort

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Van, Eck Sophie. "Binary intruders among peculiar red giant stars." Doctoral thesis, Universite Libre de Bruxelles, 1999. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211875.

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Tayar, Jamie Nicole. "Rotation in Red Giants." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1531927526281553.

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Zinn, Joel Coyle. "Accurate red giant distances and radii with asteroseismology." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555582282659221.

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Bossini, Diego. "Asteroseismology of red giant stars : a tool for constraining stellar models." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/7090/.

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The aim of this thesis is to study stellar evolution and asteroseimology of red-giant stars mainly from a modelling point of view, in particular the impact on core-convective-burning stars of adopting different mixing schemes. Thanks to NASA space telescope Kepler, asteroseismology of thousands of giants provided us new information related to their internal structure, that can be used for finding constraints on their cores. I used several stellar evolution codes (MESA, BaSTI, and PARSEC) to investigate the effect of different mixing schemes in the helium-core-burning stars. Comparing them with

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Bianchini, Marco. "The deep-water red shrimp, Aristaeomorpha foliacea, of the Sicilian Channel : biology and exploitation /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/5392.

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Colom, i. Bernadich Miquel. "Measuring the Characteristic Sizes of Convection Structures in AGB Stars with Fourier Decomposition Analyses : the Stellar Intensity Analyzer (SIA) Pipeline." Thesis, Uppsala universitet, Teoretisk astrofysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-414041.

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Context. Theoretical studies predict that the length scale of convection in stellar atmospheres isproportional to the pressure scale height, which implies that giant and supergiant stars should have convection granules of sizes comparable to their radii. Numerical simulations and the observation of anisotropies on stellar discs agree well with this prediction. Aims. To measure the characteristic sizes of convection structures of models simulated with the CO5BOLD code, to look at how they vary between models and to study their limitations due to numerical resolution. Methods. Fourier analyses a

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Szigeti, László, Szabolcs Mészáros, Verne V. Smith, et al. "12C/13C isotopic ratios in red-giant stars of the open cluster NGC 6791." OXFORD UNIV PRESS, 2018. http://hdl.handle.net/10150/627135.

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Carbon isotope ratios, along with carbon and nitrogen abundances, are derived in a sample of 11 red-giant members of one of the most metal-rich clusters in the Milky Way, NGC 6791. The selected red-giants have a mean metallicity and standard deviation of [Fe/H] = +0.39 +/- 0.06 (Cunha et al. 2015). We used high-resolution H-band spectra obtained by the SDSS-IV Apache Point Observatory Galactic Evolution Experiment. The advantage of using high-resolution spectra in the H band is that lines of CO are well represented and their line profiles are sensitive to the variation of C-12/C-13. Values of

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Rawls, Meredith Linwood. "Red giants in eclipsing binaries as a benchmark for asteroseismology." Thesis, New Mexico State University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10141461.

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<p> Red giants with solar-like oscillations are astrophysical laboratories for probing the Milky Way. The <i>Kepler </i>Space Telescope revolutionized asteroseismology by consistently monitoring thousands of targets, including several red giants in eclipsing binaries. Binarity allows us to directly measure stellar properties independently of asteroseismology. In this dissertation, we study a subset of eight red giant eclipsing binaries observed by <i> Kepler</i> with a range of orbital periods, oscillation behavior, and stellar activity. Two of the systems do not show solar-like oscillations a

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Martell, Sarah L. "Carbon and nitrogen abundance variations in globular cluster red giants /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2008. http://uclibs.org/PID/11984.

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Künstler, Andreas [Verfasser], and Klaus G. [Akademischer Betreuer] Strassmeier. "Spot evolution on the red giant star XX Triangulum / Andreas Künstler ; Betreuer: Klaus G. Strassmeier." Potsdam : Universität Potsdam, 2015. http://d-nb.info/1218399813/34.

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Mikolaitis, Šarūnas. "Evolutionary Effects of Chemical Composition in Red Giants of Open Clusters." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120913_085458-84188.

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Open clusters are important tools for studying of the Galactic disk and for understanding stellar evolution. Stars of clusters have constant age, composition and distance. This makes them to be excellent laboratories for investigations of stellar and Galactic chemical evolution. The main aim of the study is the analysis of mixing tracers and extra mixing evidences in photospheres of evolved stars. Extra-mixing processes may modify the surface abundances of 12^C/13^C and 12^C/14^N ratios. This study aims to test theoretical models. The secondary goal is a contribution to the study of present

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Han, Zhanwen. "Applications of binary evolution." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387606.

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Themeẞl, Nathalie [Verfasser], Saskia [Akademischer Betreuer] Hekker, Saskia [Gutachter] Hekker та Stefan [Gutachter] Dreizler. "Asteroseismic inferences from red-giant stars / Nathalie Themeẞl ; Gutachter: Saskia Hekker, Stefan Dreizler ; Betreuer: Saskia Hekker". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/1182677932/34.

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Conn, Anthony Rhys. "Structure of the M31 satellite system : bayesian distances from the tip of the red giant branch." Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-01012081.

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This study focuses on the spatial distribution of the M31 satellite system. A new Bayesian technique for determining object distances from the Tip of their Red Giant Branch is developed and used to obtain distance probability distributions for M31and 27 of its satellite galaxies. These distances are then used to calculate the satellite positions in three dimensions. Subsequent analysis of the resulting spatial distribution reveals striking inhomogeneity, with roughly half of the satellites confined to a curiously oriented thin disk. The distribution is also markedly asymmetric, with the majori

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Huang, Kefan. "Shaping an Iconic Species : From the giant panda to the red panda and the Tibetan antelope." Thesis, Uppsala universitet, Institutionen för arkeologi och antik historia, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-413329.

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This thesis is based and developed on the ambiguous and open conception, iconic species, which reveals the relationship between human society and non-human species that goes be- yond its biological status. From the case of the giant panda, I attempt to deconstruct the shap- ing process of an iconic species from multiple perspectives, which includes how a specific cultural context, or a specific historical period contributes to the shaping process and how the government and the public diverge or even clash around the shaping process. Then, I introduce my fieldwork where I through observing both

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Themeßl, Nathalie [Verfasser], Saskia [Akademischer Betreuer] Hekker, Saskia [Gutachter] Hekker та Stefan [Gutachter] Dreizler. "Asteroseismic inferences from red-giant stars / Nathalie Themeẞl ; Gutachter: Saskia Hekker, Stefan Dreizler ; Betreuer: Saskia Hekker". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/1182677932/34.

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Waldman, Alanna D. "Spatial and temporal trends in the Xestospongia muta (giant barrel sponge) population on the Southeast Florida Reef Tract." Thesis, NSUWorks, 2019. https://nsuworks.nova.edu/occ_stuetd/514.

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Xestospongia muta, the giant barrel sponge, is a key component of coral reef benthic communities in Southeast Florida and the Caribbean. Xestospongia muta increases habitat complexity and stability, and filters large volumes of water, enhancing water quality and facilitating nutrient cycling. Therefore, it is important to investigate trends in the X. muta population on Southeast Florida reefs in response to anthropogenic stressors, changing environmental conditions and acute disturbances and how these events affect its ecological role in the benthic community. This study identified trends in X

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Lyons, Mark Anthony. "Investigations of the interstellar medium and mass motions in cluster red-giants." Thesis, Queen's University Belfast, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337016.

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Furiak, Nicolas M. "An analysis of luminosity classification of red stars using 2MASS photometric data to create an unbiased sample of red dwarf stars." Virtual Press, 2002. http://liblink.bsu.edu/uhtbin/catkey/1236381.

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Study determined if 2MASS photometric data are reliable for luminosity classification using JHK plots of Reid and Hawley (2001). Effects of interstellar reddening on the placement of giant and dwarf data on the JIIK plot were analyzed. Dwarfs (N=54) were selected from Hipparchos and the 2MASS data reduced to an H-K range of 0.14-0.40. A disk dwarf region was identified using linear regression on the low space velocity stars. Giants selected from Volume 5 of the Michigan Catalogue of HD stars and SAG stars classified at Ball State University. They yielded 304 individual giants and 13 matches in

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Goldman, Steve. "The metallicity dependence of maser emission and mass loss from red supergiants and asymptotic giant branch stars." Thesis, Keele University, 2017. http://eprints.keele.ac.uk/4258/.

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Asymptotic Giant Branch (AGB) stars and red supergiants (RSGs) are some of the largest contributors of dust and material back to the Universe. While a substantial amount of RSG dust will be destroyed by the subsequent supernova, the dust from AGB stars will be injected into the Interstellar Medium. Understanding the contribution of these stars and how it is affected by changes in stellar parameters is critically important to determining stellar lifetimes, constraining stellar models, and understanding the evolutionary paths of core-collapse progenitors and their subsequent supernova. This stud

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Marshall, Jonathan. "Mass loss from dust-enshrouded Asymptotic Giant Branch stars and red supergiants in the Large Magellanic Cloud." Thesis, Keele University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423432.

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The process of mass-loss from evolved stars is the single largest contributor of matter back into the ISM. Intense mass-loss during the AGB phase of low-intermediate mass stars via a radiatively-driven wind can lead the stars to become enshrouded in an optically-thick layer of dust which condenses out of an extended molecular atmosphere. This thesis attempts to gain further insights into the mass-loss process that is presently poorly understood. We used the Parkes radio telescope to observe dust-enshrouded AGB stars and supergiants in the LMC and SMC, deriving the speed of the superwind from t

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Trabucchi, Michele. "New models of pulsating red giant stars: application to Long-Period Variables in the Large Magellanic Cloud." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3424579.

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Stars of low and intermediate mass (0.9 ≲ M/M ⊙ ≲ 8) develop an electron-degenerate CO core after the core He-burning phase, and experience the thermally pulsing asymptotic giant branch phase (TP-AGB) as they approach the end of their evolution. Although very short lived, TP-AGB stars are of paramount importance in the study of stellar populations and galaxy evolution. In fact, being intrinsically very bright, they provide a significant contribution to the total luminosity of single stellar populations, and galaxies in general. Most of their radiation is emitted at infrared wavelengths, a spe

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Bush, Stephanie J. "Post-Injury Recovery, Reattachment, Survival and Growth of the Giant Barrel Sponge, Xestospongia muta, Offshore Southeast Florida." NSUWorks, 2012. http://nsuworks.nova.edu/occ_stuetd/193.

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The giant barrel sponge, Xestospongia muta is a prominent component in southeast Florida reef communities and is often injured from anthropogenic or natural disturbances. The resulting complete or partial shearing of X. muta barrels frequently leads to mortality of loose fragments that do not typically reattach. This study examines the degree to which sponge size and injury severity affects recovery and growth, and explores artificial reattachment success and growth of fragments. In June 2008, 65 sponges were subjected to injury treatments of approximately 50% or 90% barrel removal. A new, sim

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Call, Scott. "Long-Period Variable Stars in the Globular Cluster NGC 6553." Bowling Green State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626973295690519.

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Jones, Caitlin Dawn. "Stellar variance for asteroseismic parameter estimation and inferences on the evolutionary state and binary population of red giant stars." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8444/.

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The latest generation of space missions have performed large scale observations of stars and this has been revolutionary in the field of asteroseismology. The ability to characterise thousands of stars has been instrumental in understanding the interiors of stars and the evolution of the Galaxy. This thesis focuses on studying red giant stars, both on an individual basis and as a population, using a robust asteroseismic metric we define based on the bandpass filtered estimate of the stellar variance. Here we present results of testing asteroseismic scaling relations, and the assumptions needed

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Oustrière, Nadège. "Assemblages végétaux pour phytomanager des sols contaminés en métaux (Cu et Zn/Pb/Cd), rhizofiltrer de l’eau contaminée en Cu et fournir des biomasses à la bioéconomie." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0265/document.

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Le phytomanagement de matrices contaminées en métaux couple leur réhabilitation écologique avec la production de biomasses végétales pour la bioéconomie. Un front de science est d’identifier des assemblages végétaux et d’optimiser leur production, aidée ou non par l’ajout d’amendements. Le phytomanagement de deux sols, l’un contaminé en Cu, l’autre en Cd, Pb et Zn, a été testé en conditions contrôlées. L’emploi conjoint de biochar et de grenaille d’acier diminue la phytotoxicité des 2 sols. En pots, sur 2 ans, cette combinaison d’amendements séquestre du carbone, diminue la phytotoxicité du so

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Fabbri, Sara <1980&gt. "Mass Loss in Population II Red Giants: an IRAC@Spitzer Survey of Galactic Globular Clusters." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2837/1/fabbri_sara_tesi.pdf.

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With the goal of studying ML along the RGB, mid-IR observations of a carefully selected sample of 17 Galactic globular clusters (GGCs) with different metallicity and horizontal branch (HB) morphology have been secured with IRAC on board Spitzer: a global sample counting about 8000 giant has been obtained. Suitable complementary photometry in the optical and near-IR has been also secured in order to properly characterize the stellar counterparts to the Spitzer sources and their photospheric parameters. Stars with color (i.e. dust) excess have been identified, their likely circums

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Fabbri, Sara <1980&gt. "Mass Loss in Population II Red Giants: an IRAC@Spitzer Survey of Galactic Globular Clusters." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2837/.

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With the goal of studying ML along the RGB, mid-IR observations of a carefully selected sample of 17 Galactic globular clusters (GGCs) with different metallicity and horizontal branch (HB) morphology have been secured with IRAC on board Spitzer: a global sample counting about 8000 giant has been obtained. Suitable complementary photometry in the optical and near-IR has been also secured in order to properly characterize the stellar counterparts to the Spitzer sources and their photospheric parameters. Stars with color (i.e. dust) excess have been identified, their likely circums

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Hall, Philip David. "The structure of common-envelope remnants." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690023.

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Kravchenko, Kateryna. "Tomography of evolved star atmospheres." Doctoral thesis, Universite Libre de Bruxelles, 2019. https://dipot.ulb.ac.be/dspace/bitstream/2013/285064/3/Thesis.pdf.

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Cool giant and supergiant stars are among the largest and most luminous stars in the Universe and, therefore, dominate the integrated light of their host galaxies. These stars were extensively studied during last few decades, however their relevant properties like photometric variability and mass loss are still poorly constrained. Understanding of these properties is crucial in the context of a broad range of astrophysical questions including chemical enrichment of the Universe, supernova progenitors, and the extragalactic distance scale. Atmospheres of giant and supergiant stars are character

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Queiroz, Helder Lima de. "Natural history and conservation of pirarucu, Àrapaima gigas', at the Amazonian Várzea : red giants in muddy waters." Thesis, University of St Andrews, 2000. http://hdl.handle.net/10023/2818.

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The pirarucu, Arapaima gigas (Osteoglossidae, Teleostei), an important natural resource in the Amazonian flooded forest, has been exploited for centuries and is now threatened by overfishing. The aim of this thesis, therefore, is to investigate the biology and ecology of this species so that sustainable management programmes can be put in place and the conservation of this fish ensured. Most of the research was carried out at Mamiraua Reserve, a protected area of Varzea forest in the Central Brazilian Amazon. Additional data were also recorded at the aquarium of the Amazonian Museum of Natural

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Corsaro, Enrico Maria Nicola. "Asteroseismology in the Kepler era and from ground-based observations." Doctoral thesis, Università di Catania, 2013. http://hdl.handle.net/10761/1378.

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In this dissertation we present and investigate the new results attained in the field of Asteroseismology, a branch of stellar physics that aims at deriving the fundamental stellar properties and at describing the internal structure of the stars by means of the oscillations observed at their surface. The stochastically excited and intrinsically damped acoustic modes, also known as solar-like oscillations, represent the main class of pulsations discussed in this thesis. The document is sectioned into four parts, with the last one including a complementary material for the reader. Part I deals

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Pereira, Zilene Moreira. "Estudo das percepções de estudantes da rede pública e da helmintofauna associada ao caramujo africano Achatina fulica Bowdich, 1822 (Mollusca, Gastropoda) em Barra do Piraí (RJ): subsídios para uma intervenção educativa." reponame:Repositório Institucional da FIOCRUZ, 2010. https://www.arca.fiocruz.br/handle/icict/4048.

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Submitted by Anderson Silva (avargas@icict.fiocruz.br) on 2012-05-09T12:47:47Z No. of bitstreams: 1 zilene_m_pereira_ioc_ebs_0008_2010.pdf: 15520398 bytes, checksum: 493b6f7c7e7dea5020af412b5cc0cffc (MD5)<br>Made available in DSpace on 2012-05-09T12:47:47Z (GMT). No. of bitstreams: 1 zilene_m_pereira_ioc_ebs_0008_2010.pdf: 15520398 bytes, checksum: 493b6f7c7e7dea5020af412b5cc0cffc (MD5) Previous issue date: 2010<br>Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil.<br>Achatina fulica, ou caramujo africano, foi introduzido no Brasil em meados da década de 1980 pa

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De, Assis Peralta Raphaël. "Caractériser les populations stellaires à l'aide d'indices sismiques." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066106/document.

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A l'instar de la sismologie terrestre, l'astérosismologie est l'étude des tremblements d'étoiles. Ces vibrations internes sont observées via les variations de luminosité (ou de vitesse) qui se manifestent à leurs surfaces. A partir de ces séries temporelles, on calcule les spectres de puissance qui contiennent une véritable mine d'informations. En particulier, pour les pulsateurs de types solaires, nous pouvons observer le signal de la granulation ainsi que les modes propres d'oscillations stellaires qui sont tous deux une conséquence directe de la convection dans l'enveloppe de l'étoile. L'as

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Roa-Quiaoit, Hilly Ann F. [Verfasser], Ulrich [Akademischer Betreuer] Saint-Paul, and Claudio [Akademischer Betreuer] Richter. "The ecology and culture of giant clams (Tridacnidae) in the Jordanian sector of the Gulf of Aqaba, Red Sea / Hilly Ann F. Roa-Quiaoit. Gutachter: Claudio Richter. Betreuer: Ulrich Saint-Paul." Bremen : Staats- und Universitätsbibliothek Bremen, 2005. http://d-nb.info/1072302276/34.

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Fu, Xiaoting. "Evolution of low mass stars: lithium problem and alpha enhanced tracks and isochrones." Doctoral thesis, SISSA, 2016. http://hdl.handle.net/20.500.11767/4919.

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PARSEC (PAdova-TRieste Stellar Evolution Code) is the updated version of the the stellar evolution code used in Padova. It provides stellar tracks and isochrones for stellar mass from 0.1 M ⊙ to 350 M ⊙ and metallicity from Z=0.00001 to 0.06. The evolutionary phases are from pre-main sequence to the thermally pulsing asymptotic giant branch. The core of my Ph.D. project is building a new PARSEC database of α enhanced stellar evolutionary tracks and isochrones for Gaia. Precise studies on the Galactic bulge, globular cluster, Galactic halo and Galactic thick disk require stellar models with

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Pasquato, Ester. "Effects of stellar surface inhomogeneities on astrometric accuracy." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209872.

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Surface brightness asymmetries are a very common feature of stars. Among other effects they cause a difference between the projected centre of mass and the photocentre. The evolution of those surface features makes this difference time-dependent. In some cases the displacement can be a non-negligible fraction of the star radius R, and if R>1 AU, of the parallax. We investigate the impact of surface brightness asymmetries on the Gaia astrometric solution and on the data processing flow. In particular we derive analytical expressions for the change in the derived astrometric parameters for a sin

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Moura, Bruno Lustosa de. "O enigm?tico problema das gigantes ricas em L?tio e as perspectivas com o sat?lite Kepler." Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16652.

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Made available in DSpace on 2014-12-17T15:15:04Z (GMT). No. of bitstreams: 1 BrunoLM_DISSERT.pdf: 7166646 bytes, checksum: f3020f244ae15650c85072127bcd05e2 (MD5) Previous issue date: 2014-04-24<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>Lithium (Li) is a chemical element with atomic number 3 and it is among the lightest known elements in the universe. In general, the Lithium is found in the nature under the form of two stable isotopes, the 6Li and 7Li. This last one is the most dominant and responds for about 93% of the Li found in the Universe. Due to its fragileness

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Gehan, Charlotte. "Évolution de la rotation du cœur des étoiles sur la branche des géantes rouges : des mesures à grande échelle vers une caractérisation du transport de moment cinétique." Thesis, Paris Sciences et Lettres, 2018. http://www.theses.fr/2018PSLEO021/document.

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L’astérosismologie consiste à sonder les intérieurs stellaires en détectant les ondes sismiques qui s’y propagent. Les géantes rouges, des étoiles évoluées peu massives dont l’hydrogène du cœur est épuisé, sont des pulsateurs de type solaire présentant des modes mixtes qui nous permettent d’accéder directement aux propriétés physiques de leur cœur. Les mesures sismiques disponibles indiquent qu’un ou plusieurs mécanismes physiques encore mal compris contrebalancent l’accélération de la rotation du cœur sous l’effet de sa contraction, en transportant du moment cinétique. La majeure partie de ce

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Mattioli, Giulia. "Reazioni termonucleari nei nuclei stellari." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24275/.

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In questo lavoro di tesi si descrivono le principali reazioni termonucleari che sono il principale meccanismo di produzione energetica nei nuclei stellari. La trattazione è stata effettuata seguendo un approccio interdisciplinare, evidenziando il collegamento tra aspetti di meccanica quantistica, fisica nucleare e astrofisica. L'obiettivo della tesi è fornire un quadro completo e organico dell'argomento e legare le catene di bruciamenti termonucleari alle diverse fasi dell'evoluzione stellare. Nel primo capitolo si è effettuata una trattazione fisica e matematica per poter definire il tass

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