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Dissertations / Theses on the topic 'Chamaeleon'

Author: Grafiati

Published: 10 December 2022

Last updated: 31 July 2025

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1

Manara, C. F., L. Testi, G. J. Herczeg, et al. "X-shooter study of accretion in Chamaeleon I." EDP SCIENCES S A, 2017. http://hdl.handle.net/10150/625828.

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The dependence of the mass accretion rate on the stellar properties is a key constraint for star formation and disk evolution studies. Here we present a study of a sample of stars in the Chamaeleon I star-forming region carried out using spectra taken with the ESO VLT/X-shooter spectrograph. The sample is nearly complete down to stellar masses (M-star) similar to 0.1 M-circle dot for the young stars still harboring a disk in this region. We derive the stellar and accretion parameters using a self-consistent method to fit the broadband flux-calibrated medium resolution spectrum. The correlation

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2

Long, Feng, Gregory J. Herczeg, Ilaria Pascucci, et al. "An ALMA Survey of CO Isotopologue Emission from Protoplanetary Disks in Chamaeleon I." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/625159.

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The mass of a protoplanetary disk limits the formation and future growth of any planet. Masses of protoplanetary disks are usually calculated from measurements of the dust continuum emission by assuming an interstellar gas-to-dust ratio. To investigate the utility of CO as an alternate probe of disk mass, we use ALMA to survey (CO)-C-13 and (CO)-O-18 J = 3-2 line emission from a sample of 93 protoplanetary disks around stars and brown dwarfs with masses from 0.03 to 2 M-circle dot in the nearby Chamaeleon I star-forming region. We detect (CO)-C-13 emission from 17 sources and (CO)-O-18 from on

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3

Barbosa, Wagner Jose Corradi. "O meio interestelar local na direção das nuvens escuras Saco de Carvão e Chamaeleon-Musca." Universidade Federal de Minas Gerais, 1998. http://hdl.handle.net/1843/BUOS-9GHRAV.

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Recent investigations of the colour excess distribution towards the geometric center of the Chamaeleon-Musca dark clouds complex and the Southern Coalsack dark cloud have suggested that, although being apart by more than 15, these clouds might be physically associated. In order to sustain such hypothesis a new photometric programme has been carried out to trace the extinction between the features. We used the Str¨omgren Automatic Telescope at the European Southern Observatory (ESO), in La Silla (Chile), to obtain uvby_ photometry for all stars, earlier than G0 in the catalog of the Smithsonian

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4

Matos, Sónia Maria Gomes. "Biologia e plantas hospedeiras de uma nova espécie galícola de eucaliptos em Portugal - Ophelimus SP." Master's thesis, ISA/UL, 2014. http://hdl.handle.net/10400.5/8285.

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Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia<br>In 2013, a new Ophelimus sp. was detected in a Eucalyptus arboretum in Lisbon. This study aims to study the bio-ecological characteristics of Ophelimus sp. as basic knowledge for its management. We further compare it with the previous introduced species Ophelimus maskelli. Our results showed morphological differences on the galls and adults of O. maskelli and Ophelimus sp., and on the host species. Eucalyptus globulus and E. viminalis were the most susceptible species to Ophelimus sp., whereas it was

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5

Laslie, Kathryn C. "Investigations of Biotremors in the Veiled Chameleon (Chamaeleo calyptratus)." TopSCHOLAR®, 2018. https://digitalcommons.wku.edu/theses/3067.

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While substrate-borne vibrations are utilized by different reptile species, true conspecific communication via biotremors has not yet been demonstrated in reptiles. This study follows a preliminary report that the veiled chameleon (Chamaeleo calyptratus) could produce biotremors in communicative contexts. I tested chameleon behavioral sensitivity to vibrations by placing them on a dowel attached to a shaker emitting vibrations of 25, 50, 150, 300, and 600 Hz and then measured their changes in velocity before and after the stimulus. I then paired chameleons in various social contexts [anthropog

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6

Tegge, Samuel. "The Mechanism of Biotremor Production in the Veiled Chameleon (Chamaeleo calyptratus)." TopSCHOLAR®, 2018. https://digitalcommons.wku.edu/theses/2336.

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Vibratory communication has evolved in numerous animal groups, including insects, spiders, fishes, mammals, and was recently discovered in veiled chameleons (Chamaeleo calyptratus). I examined the mechanism by which C. calyptratus produce these biotremors. Muscle activity data were gathered during simulated anti-predator responses via electromyography (EMG) with simultaneous recordings of biotremor production using an accelerometer. I correlated EMG data with the accelerometer data to implicate the muscles responsible for the production of the biotremors. Mixed-effect linear regression models

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7

Melero, Jurado Adrián. "Anatomical description of the coelomic cavity organs using radiography, ultrasonography and computed tomography in healthy veiled chameleons (Chamaeleo calyptratus) and panther chameleons (Furcifer pardalis)|Descripción anatómica de los órganos de la cavidad celómica mediante radiografía, ecografía y tomografía computerizada en camaleones velados (Chamaeleo calyptratus) y camaleones pantera (Furcifer pardalis) sanos." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670673.

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El camaleó vetllat (Chamaeleo calyptratus) i el camaleó pantera (Furcifer pardalis) són dues de les espècies de camaleó més populars al món, i en conseqüència, dues de les que més freqüentment s’atenen a les consultes veterinàries. Les diferents tècniques de diagnòstic per imatge solen incloure’s de forma rutinària als protocols diagnòstics en medicina herpetològica com són la radiografia, la ecografia, la tomografia computeritzada y la ressonància magnètica. Tot i així, els estudis publicats sobre descripció anatòmica mitjançant tècniques d’imatge són escassos, i la interpretació d’aque

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8

Weinmann, Nadine. "Übertragung eines Iridovirus aus einem Helmchamäleon (Chamaeleo hoehnelii) auf Grillen der Spezies Gryllus bimaculatus und Versuch zur Infektion von Bartagamen (Pogona vitticeps) mit Iridovirus-infizierten Grillen." Giessen : VVB Laufersweiler, 2007. http://d-nb.info/98800724X/04.

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9

Weinmann, Nadine [Verfasser]. "Übertragung eines Iridovirus aus einem Helmchamäleon (Chamaeleo hoehnelii) auf Grillen der Spezies Gryllus bimaculatus und Versuch zur Infektion von Bartagamen (Pogona vitticeps) mit Iridovirus-infizierten Grillen / eingereicht von Nadine Weinmann." Giessen : VVB Laufersweiler, 2008. http://d-nb.info/988769107/34.

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10

Amaro, Diogo Gil Durão Duarte Nunes. "Vale a pena devolver à Natureza animais reabilitados? O caso do camaleão-comum (Chamaeleo chamaeleon) num centro de recuperação no Algarve (RIAS)." Master's thesis, 2017. http://hdl.handle.net/10451/30856.

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Tese de mestrado em Biologia da Conservação, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2017<br>O objectivo dos centros de recuperação de animais selvagens é tratar e devolver à Natureza animais feridos, doentes ou órfãos. Contudo, geralmente não se sabe o que acontece aos animais recuperados após a devolução ao seu habitat natural. Esta situação torna-se particularmente problemática quando se trata de espécies ameaçadas ou sobre as quais se desconhece os seus movimentos e requisitos ambientais. O camaleão-comum ( Chamaeleo chamaeleon ) é um réptil que, em Portugal

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11

Murphy, Simon John. "Revealing the Chamaeleon: Young, low-mass stars surrounding eta and epsilon Cha." Phd thesis, 2011. http://hdl.handle.net/1885/8895.

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The deep southern sky surrounding the Chamaeleon dark clouds is abundant with pre-main sequence stars of various ages. Because of their youth (5-10 Myr) and proximity (d~100 pc), members of the open cluster Eta Chamaeleontis and the nearby Epsilon Chamaeleontis Association are ideal laboratories to study the formation and evolution of extrasolar planetary systems. To better understand their role as potential planet hosts, this thesis explores the formation, dynamical evolution, accretion and disk properties of both groups' low-mass members. The notable lack of low-mass stars in the young o

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12

PENG, YI-HANG, and 彭一航. "The Chamaeleon in the Spectrum of Photography: Discourse about Peng Yi-Hang's Art Creation." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/z2qtp3.

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碩士<br>國立臺北教育大學<br>藝術與造形設計學系碩士班<br>107<br>This thesis is titled “the Chamaeleon in the Spectrum of Photography” as I use chamaeleon to symbolise my works – they are in disguise in the realm of photography, appearing to be similar but actually not alike in terms of methodologies and presentation. A spectrum consists of a gradation of successive changes – not like black and white in binary oppositions – and there is no sharp division between them but gradations of successive changes. The “artificial nature” in my works fights with two different characters in the spectrum and turns to be impressiv

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13

Nguyen, Duy Cuong. "Probing Star Formation with High Resolution Spectroscopy: Multiplicity, Disk Braking, and Accretion in Chamaeleon I and Taurus-Auriga." Thesis, 2010. http://hdl.handle.net/1807/24450.

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In this thesis, we focus on obtaining and interpreting observational information on (i) the role of multiplicity on the properties of young stars; (ii) the early evolutionary influence of circumstellar disks; and (iii) the nature of accretion in young systems. To facilitate this research, we conducted an extensive multi-epoch high-resolution spectroscopic survey at optical wavelengths (3,200-10,000 A) of ~200 T Tauri stars in the ~2 Myr old Chamaeleon I, and Taurus-Auriga star-forming regions with the Magellan Inamori Kyocera Echelle (MIKE) spectrograph on the Magellan Clay 6.5 m telescope. F

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14

Wong, Graeme F. "Characterising the structure of molecular clouds." Thesis, 2016. http://hdl.handle.net/1959.7/uws:40925.

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The Interstellar Medium contains the building blocks of matter in our Galaxy and plays a vital role in the evolution of low mass star formation. The poorly studied molecular clouds of Lupus and Chamaeleon contain ongoing low mass star formation, and are in close proximity to our Solar System. While on the other hand the Carina molecular cloud, poorly observed in radio wavelength, is an active region of star formation and host some of the brightest stars known within our Galaxy. Using tracers like carbon monoxide, atomic neutral carbon, and ammonia, we are able to measure the temperature and de

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15

Samuel, Angela E. "The nature of star formation in the Trapezium Cluster." Phd thesis, 1993. http://hdl.handle.net/1885/12624.

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The Trapezium Cluster stellar population is studied in detail using near-infrared and optical means in order to probe the clustered mode of low and high mass star formation. We determine fundamental stellar parameters such as the spectral types, ages, masses, extinctions and dust excesses for a significant number of cluster stars. Various techniques are applied to deredden the stars in the color-magnitude diagram and hence compare intrinsic positions with theoretical evolutionary tracks. Through these means, we estimate properties of the low mass stellar population to greater accuracy than has

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16

Pimm, Robyn. "Characterization of Follicular Stasis in a Colony of Female Veiled Chameleons (Chamaeleo calyptratus)." Thesis, 2013. http://hdl.handle.net/10214/6678.

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This study investigates the etiology, diagnosis, and treatment of follicular stasis in female veiled chameleons (Chamaeleo calyptratus). Reproductive status was assessed by enzyme immunoassay of fecal metabolites of estrogen, progesterone, testosterone, and corticosterone; ultrasonography; and male introduction trials. Ultrasonography and hormone pattern analysis confirmed follicular stasis, while female response to male presence was inconclusive. Hormone patterns of corticosterone metabolites indicated a cyclical pattern consistent with reproductive events, but there was insufficient data to

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17

Pistorius, Liesl. "A homoeopathic drug proving of Chamaeleo dilepis dilepis, analysing symptomatology in relation to the doctrine of signatures." Thesis, 2007. http://hdl.handle.net/10321/23.

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Thesis (M.Tech.: Homoeopathy)-Dept of Homoeopathy, Durban University of Technology, 2007 xiii, 315 leaves<br>This study was conducted by administering Chamaeleo dilepis dilepis 30CH to healthy individuals with the aim of eliciting and documenting the resulting mental, emotional and physical symptomology. Chamaeleo dilepis dilepis was chosen as a substance based on it being indigenous to South Africa and as no other members of the Chamaeleonidae species have been proven

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18

Moore, Debora. "A homoeopathic drug proving of Chamaeleo dilepis dilepis with a subsequent comparison of this remedy to those remedies yielding the highest numerical value and total number of rubrics on repertorisation of the proving symptoms." Thesis, 2007. http://hdl.handle.net/10321/22.

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Thesis (M.Tech.: Homoeopathy)-Dept. of Homoeopathy, Durban University of Technology, 2007 xiv, 348 leaves<br>The purpose of this investigation was to determine the effect of Chamaeleo dilepis dilepis on healthy volunteers (provers), and to record the signs and symptoms produced, so that it may be prescribed to those suffering from similar symptoms as determined by the Law of Similars. A further aim of the investigation was to compare the materia medica of Chamaleo dilepis dilepis as determined by proving symptoms to those remedies yielding the highest numerical value and total number of rubr

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