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Author: Sujay Pal
Publisher: Scientific Research Publishing, Inc. USA
ISBN: 164997437X
Category : Antiques & Collectibles
Languages : en
Pages : 269
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Book Description
This book Advances in Modern and Applied Science materializes our long-cherished dream of publishing a series of volumes consisting of review papers on contemporary research fields from a broad spectrum of basic sciences. The present volume, which is our first baby-step towards that fulfilment, includes a collection of twenty-five review articles contributed by about fifty researchers and scientists whose vocations are in diverse fields of science including astrophysics, astronomy, high energy physics, space science, atmospheric sciences, computer sciences to material sciences.
Author: Sujay Pal
Publisher: Scientific Research Publishing, Inc. USA
ISBN: 164997437X
Category : Antiques & Collectibles
Languages : en
Pages : 269
Get Book Here
Book Description
This book Advances in Modern and Applied Science materializes our long-cherished dream of publishing a series of volumes consisting of review papers on contemporary research fields from a broad spectrum of basic sciences. The present volume, which is our first baby-step towards that fulfilment, includes a collection of twenty-five review articles contributed by about fifty researchers and scientists whose vocations are in diverse fields of science including astrophysics, astronomy, high energy physics, space science, atmospheric sciences, computer sciences to material sciences.
Author: TAUFIQ.. HIDAYAT
Publisher:
ISBN:
Category :
Languages : fr
Pages : 222
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Book Description
LES OBSERVATIONS DE RADIOASTRONOMIE MILLIMETRIQUE ONT PERMIS D'EFFECTUER DE GRANDES DECOUVERTES DANS LE DOMAINE PLANETAIRE. CE N'EST QUE DEPUIS UNE DIZAINE D'ANNEES SEULEMENT QUE TITAN, QUI EMET UN FLUX TRES FAIBLE, EST OBSERVE A L'AIDE DE TECHNIQUES HETERODYNES. CES MESURES SE TROUVENT ETRE PARTICULIEREMENT INTERESSANTES CAR ELLES PERMETTENT DE RETROUVER LE PROFIL VERTICAL DU CONSTITUANT RECHERCHE LORSQUE LE SPECTRE COMPORTE UN RAPPORT SIGNAL-SUR-BRUIT SUFFISANT A HAUTE RESOLUTION SPECTRALE. LE TRAVAIL DE RECHERCHE EXPOSE ICI PRESENTE DONC DES OBSERVATIONS DE RADIOASTRONOMIE MILLIMETRIQUE ET SUBMILLIMETRIQUE OBTENUES SUR TITAN PENDANT PLUSIEURS ANNEES AUX OBSERVATOIRES DE L'IRAM (TELESCOPE DE 30M, GRENADE, ET INTERFEROMETRE DU PLATEAU DE BURE, GRENOBLE) ET A L'OBSERVATOIRE DU JCMT (HAWAII). LA TOTALITE DES MESURES A ETE ANALYSEE AFIN DE RECHERCHER DES INFORMATIONS PRECISES SUR SON ATMOSPHERE, EN PARTICULIER EN TERME DE COMPOSITION STRATOSPHERIQUE. DES SIMULATIONS DE SPECTRES SYNTHETIQUES, PRENANT EN COMPTE LA GEOMETRIE SPHERIQUE DU SATELLITE, ONT PERMIS DE DEDUIRE LES PROFILS VERTICAUX DE 7 CONSTITUANTS AINSI QUE DES LIMITES SUPERIEURES DE 5 AUTRES ESPECES MOLECULAIRES. LES RESULTATS PRINCIPAUX CONCERNENT LE MONOXYDE DE CARBONE, TROIS NITRILES (HCN, CH#3CN, HC#3N) POUR LESQUELS NOUS PROPOSONS DES DISTRIBUTIONS VERTICALES : ENTRE 60 ET 350 KM POUR CO, 80 ET 500 KM POUR LES NITRILES. DES LIMITES SUPERIEURES DE RAPPORT DE MELANGE SONT PROPOSEES POUR LES NITRILES PLUS COMPLEXES C#2H#3CN, C#2H#5CN ET HC#5N, ET DEUX COMPOSES OXYGENES H#2CO ET CH#3OH. LES RESULTATS PRESENTES SONT COMPARES A DES PREDICTIONS RECENTES DE MODELISATIONS PHOTOCHIMIQUES. TROIS ISOTOPES DE HCN ET CO ONT ETE OBSERVES DANS PLUSIEURS TRANSITIONS DE #1#3CO, H#1#3CN ET HC#1#5N. LA DISTRIBUTION VERTICALE DE H#1#3CN, COMPAREE A CELLE DE H#1#2CN, NOUS A PERMIS DE DEDUIRE LA VALEUR PRECISE DU RAPPORT #1#2C/#1#3C (VOISIN DE LA VALEUR TERRESTRE), PUIS DE CONTRAINDRE LA DISTRIBUTION DE CO DANS LA BASSE STRATOSPHERE. LES DERNIERES OBSERVATIONS EFFECTUEES EN JUILLET 1997 AU TELESCOPE DE 30M DE L'IRAM NOUS ONT PERMIS DE MESURER AVEC GRANDE PRECISION LE RAPPORT HC#1#4N/HC#1#5N, QUE L'ON TROUVE EGAL A 60, COMPORTANT UN FACTEUR D'ENRICHISSEMENT EN #1#5N EGAL A 4,5 SI L'ON PREND COMME REFERENCE LA VALEUR TERRESTRE DE 272. TITAN S'AVERE DONC COMME LE SECOND OBJET DU SYSTEME SOLAIRE, APRES MARS, QUI PRESENTE UNE FORTE ANOMALIE ISOTOPIQUE EN #1#5N. NOUS PROPOSONS UNE ANALYSE DE CE RESULTAT A L'AIDE D'ETUDES QUI ONT ETE APPLIQUEES A MARS, MAIS NOUS CONCLUONS QUE CE FORT ENRICHISSEMENT DU RAPPORT HC#1#5N/HC#1#4N EST A PRESENT DIFFICILEMENT EXPLICABLE ET NECESSITERA DES ETUDES THEORIQUES APPROFONDIES. DES PERSPECTIVES OBSERVATIONNELLES NOUVELLES DE TITAN SONT EBAUCHEES : CERTAINES A COURT TERME CONCERNENT LA POURSUITE DE PROGRAMMES DEJA ENGAGES ; D'AUTRES ENVISAGENT DES PERSPECTIVES A PLUS LONG TERME QUI COMBINERONT DES MESURES INTERFEROMETRIQUES, RESOLVANT LE DISQUE DE TITAN, QUE LES TRES GRANDS PROJETS D'INTERFEROMETRES MILLIMETRIQUES PERMETTRONT, ET LES NOMBREUSES MESURES QU'APPORTERA LA MISSION CASSINI.
Author: André Heck
Publisher: Springer
ISBN: 9780792365105
Category : Language Arts & Disciplines
Languages : en
Pages : 813
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Book Description
When working in the highly technical fields of astronomy and the related space sciences, the practitioner is constantly confronted with a baffling array of different abbreviations, acronyms, contractions, and symbols. The identification and differentiation of these terms is a task which, all too often, can prove to be a near impossible one. With over 140,000 separate dictionary-style entries, and over 20 years in collation, StarBriefs 2001 represents the most comprehensive and accurately validated collection of abbreviations, acronyms, contractions, and symbols within astronomy, related space sciences and other related fields. As such, this invaluable reference source (and its companion volume, StarGuides 2001 should be on the reference shelf of every library, organisation or individual with any interest in these areas. Besides astronomy and space sciences, related fields such as aeronautics, aeronomy, astronautics, atmospheric sciences, chemistry, communications, computer sciences, data processing, education, electronics, engineering, energetics, environmental, geodesy, geophysics, information handling, management, mathematics, meteorology, optics, physics, remote sensing, and so on, are also covered when justified. In addition, there are separate sections devoted to Greek letters, mathematical symbols, special signs and characters, as well as to entries with a numerical prefix. Finally, terms in common use and/or of general interest have also been included where appropriate.
Author: Eugene Howard Levy
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1622
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Book Description
Previous Space Science Series volumes Protostars and Planets (1978) and Protostars and Planets II (1985) were among the most timely offerings of this illustrious collection of technical works. Now Protostars and Planets III continues to address fundamental questions concerning the formation of stars and planetary systems in general and of our solar system in particular. Drawing from recent advances in observational, experimental, and theoretical research, it summarizes our current understanding of these processes and addresses major open questions and research issues. Among the more notable subjects covered in the more than three dozen chapters are the collapse of clouds and the formation and evolution of stars and disks; nucleosynthesis and star formation; the occurrence and properties of disks around young stars; T Tauri stars and their accretion disks; gaseous accretion and the formation of the giant planets; comets and the origin of the Solar-System; and the long-term dynamical evolution and stability of the solar system. Protostars and Planets III reflects the enormous progress made in understanding star and planet formation as a result of new observational capabilities and cooperative research among scientists from diverse fields. As new discoveries continue to be made, it will stand as an unparalleled reference for tomorrow's research.
Author: Frerich Keil
Publisher: Springer Science & Business Media
ISBN: 3642801498
Category : Science
Languages : en
Pages : 274
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Book Description
Scientific Computing in Chemical Engineering gives the state of the art from the point of view of the numerical mathematicians as well as from the engineers. The application of modern methods in numerical mathematics on problems in chemical engineering, especially reactor modeling, process simulation, process optimization and the use of parallel computing is detailed.
Author: William Richard Black
Publisher: Indiana University Press
ISBN: 9780253340672
Category : Business & Economics
Languages : en
Pages : 598
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Book Description
Transportation research has traditionally been dominated by engineering and logistics research approaches. This book integrates social, economic, and behavioral sciences into the transportation field. As its title indicates, emphasis is on socioeconomic changes, which increasingly govern the development of the transportation sector. The papers presented here originated at a conference on Social Change and Sustainable Transport held at the University of California at Berkeley in March 1999, under the auspices of the European Science Foundation and the National Science Foundation. The contributors, who represent a range of disciplines, including geography and regional science, economics, political science, sociology, and psychology, come from twelve different countries. Their subjects cover the consequences of environmentally sustainable transportation vs. the "business-as-usual" status quo, the new phenomenon of "edge cities," automobile dependence as a social problem, the influence of leisure or discretionary travel and of company cars, the problems of freight transport, the future of railroads in Europe, the imposition of electronic road tolls, potential transport benefits of e-commerce, and the electric car.
