1,725,788 research outputs found
Spectrographic instrumentation of the James Webb telescope
No full textopenStudio sula strumentazione del telescopio James Webb per l'identificazione degli elementi presenti sulla superficie dei pianeti.A study about the James Webb Space telescope and its spectrographic instrumentation for the research of new planet's elements
Lagrange points for space observation: James Webb Space Telescope mission around L2
No full textopenIl problema ristretto dei 3 corpi e la soluzione data dai punti di Lagrange: caratteristiche dei punti, stabilità e scopi di utilizzo. Analisi dell'impiego di orbite attorno ai punti di Lagrange con finalità di osservazione spaziale; in particolare: il telescopio James Webb in orbita halo attorno al punto L2
James Webb Space Telescope: a detailed analysis of the launch and deployment of the biggest space telescope ever built
Full text linkopenL’elaborato va a trattare in dettaglio la messa in orbita del James Webb Space Telescope, il telescopio spaziale più grande mai costruito entrato in funzione nell’estate del 2022. Si concentra sulle caratteristiche del lanciatore, dell’orbita e della sequenza di deployment, ovvero le fasi più critiche che assicurano il funzionamento dei sistemi di bordo. Partendo dal decollo del vettore fino al completo dispiegamento in orbita, nella tesi viene ripercorso un arco temporale di eventi che precedono l’utilizzo scientifico del nuovo telescopio.
La ricerca bibliografica si è basata sulla consultazione di articoli e informazioni specifiche, sfruttando l’attualità dell’argomento e introducendo i primi importanti risultati ottenuti dal satellite scientifico
An accurate automated speaker counting architecture based on James Webb Pattern
No full textSpeaker counting is an important research area in sound forensics. There are limited speaker counting papers in the literature, as it is challenging to collect datasets. This work aims to collect a new overlapping speech signal dataset for speaker counting and propose a novel feature engineering model. In this work, textural feature extraction is based on the iconic James Webb space telescope; hence, this pattern is named James Webb Pattern (JWPat). A new speaker counting speech dataset comprising 3,121 speeches divided into 32 classes (the class number corresponded to the number of speakers) was collected. A new framework that mimics the deep learning model has been proposed to classify the collected speech classes. The proposed feature engineering model is self-organized and uses various mother wavelet functions to generate features at both low and high levels. We have obtained the best classification accuracy of 86.74% using the symlet4 mother wavelet function. Using our proposed framework, eight classification results have been calculated with accuracy ranging from 75.94% to 86.74%. This range is over 10% accuracy, and it demonstrates the effect of the mother wavelet function on the classification performance. Moreover, the feature extraction capability of the mirror of the James Webb telescope has been demonstrated. Our proposed method yielded 86.74% accuracy on a large dataset and indicated the success of our proposed model
The James Webb Space Telescope
Full text linkThe James Webb Space Telescope is the scientific successor to the Hubble and Spitzer Space Telescopes, and is currently the largest scientific project under construction in the United States. It will be a large (6.6m) cold (50K) telescope launched in about 5 years into orbit around the second Earth-Sun Lagrange point. It is a partnership of NASA with the European and Canadian Space Agencies. Science with the James Webb Space Telescope falls into four themes. The End of the Dark Ages: First Light and Reionization theme seeks to identify the first luminous sources to form and to determine the ionization history of the universe. The Assembly of Galaxies theme seeks to determine how galaxies and the dark matter, gas, stars, metals, morphological structures, and black holes within them evolved from the epoch of reionization to the present. The Birth of Stars and Proto planetary Systems theme seeks to unravel the birth and early evolution of stars, from infall onto dust-enshrouded protostars, to the genesis of planetary systems. The Planetary Systems and the Origins of Life theme seeks to determine the physical and chemical properties of planetary systems around nearby stars and of our own, and investigate the potential for life in those systems. Webb will have four instruments: The Near-Infrared Camera, the Near-Infrared multi-object Spectrograph, and the Tunable Filter Imager will cover the wavelength range 0.6 to 5 microns, while the Mid-Infrared Instrument will do both imaging and spectroscopy from 5 to 28.5 microns. I will conclude the talk with a description of recent technical progress in the construction of the observatory
NASA's James Webb Space Telescope
No full textThe status and expectations for NASA's James Webb Space Telescope are presented in this special evening session for a general audience
O Telescópio Espacial James Webb
No full textWe constantly question ourselves about the beginnings of the universe, its origin, immensity and more and more scientific instruments help us understand these factors. In this article we seek to comprehendthe technological and scientific innovations promoted by the James Webb telescope and how they contribute to the understanding of the universe. To answer our research problem and outline the objectives of the article, we carried out a qualitative research, through articles developed on the subject. The telescope was able to record a historic milestone by viewing the oldest galaxy and star ever documented. Considering these advances, it is undeniable that the James Webb telescope will still bring several advances to humanity and revolutionize space science with discoveries about the Universe.Constantemente nos cuestionamos sobre los inicios del universo, su origen, la inmensidad y cada vez más instrumentos científicos nos ayudan a comprender estos factores. En este artículo buscamos comprender las innovaciones tecnológicas y científicas impulsadas por el telescopio James Webb y cómo contribuyen a la comprensión del universo. Para dar respuesta a nuestro problema de investigación y delinear los objetivos del artículo, realizamos una investigación cualitativa, a través de artículos desarrollados sobre el tema. El telescopio pudo capturar un hito histórico al ver la galaxia y la estrella más antiguas jamás documentadas. Teniendo en cuenta estos avances, es innegable que el telescopio James Webb aún traerá muchos avances a la humanidad y revolucionará la ciencia espacial con descubrimientos sobre el Universo.Constantemente nos questionamos sobre os primórdios do universo, sua origem, imensidão e cada vez mais os instrumentos científicos nos ajudam a compreender esses fatores. Neste artigo buscamos compreender as inovações tecnológicas e científicas promovidas pelo telescópio James Webb e como estas colaboram para a compreensão do universo. Para responder nosso problema de pesquisa e traçar os objetivos do artigo, realizamos uma pesquisa qualitativa, através de artigos desenvolvidos sobre o tema. O telescópio foi capaz de registrar um marco histórico visualizando a galáxia e a estrela mais antigas já documentadas. Considerando esses avanços, é inegável que o telescópio James Webb ainda trará diversos avanços para a humanidade e revolucionará a ciência espacial com descobertas sobre o Universo
Observations of transiting exoplanets with the James Webb Space Telescope (JWST)
No full textThis article summarizes a workshop held on March, 2014, on the potential of the James Webb Space Telescope (JWST) to revolutionize our knowledge of the physical properties of exoplanets through transit observations. JWST’s unique combination of high sensitivity and broad wavelength coverage will enable the accurate measurement of transits with high signal-to-noise ratio (S/N). Most importantly, JWST spectroscopy will investigate planetary atmospheres to determine atomic and molecular compositions, to probe vertical and horizontal structure, and to follow dynamical evolution, i.e., exoplanet weather. JWST will sample a diverse population of planets of varying masses and densities in a wide variety of environments characterized by a range of host star masses and metallicities, orbital semi-major axes, and eccentricities. A broad program of exoplanet science could use a substantial fraction of the overall JWST mission
Das James Webb Space Telescope
No full textNicht nach einem berühmten Astronomen, sondern nach einem ihrer erfolgreichen Behördenleiter hat die NASA ihr neues astronomisches Flaggschiff benannt: Im Jahre 2011 soll das James Webb Space Telescope (JWST) das Weltraumteleskop Hubble ablösen
James Webb Space Telescope
Full text linkThe James Webb Space Telescope (JWST) is the latest Space Observatory that features advanced cutting edge technology, including infrared light detection instruments that capture images of distant objects which wavelength elongated due to the expansion of the universe, faint young stars and exoplanets
- …
