Search results for "Space Shuttle"

showing 7 items of 7 documents

Zvaigžņotā Debess: 2012, Vasara (216)

2012

Contents: “ZVAIGŽŅOTĀ DEBESS” FORTY YEARS AGO: E.Bervalds. From Intention to Reality (abridged) ; A.Egle. Conceptions of Our Ancestry About Heavenly Bodies and Astronomical Phenomena (abridged) ; NEWS: I.Eglītis. Asteroid Discovered at Baldone Observatory Named after Ikaunieks ; A.Alksnis. ALMA Helps to Study Planetary System of Star Fomalhaut ; A.Alksnis. More than Ten Light-Years Long Filament of Cosmic Dust Discovered ; A.Alksnis. Billions of Rocky Planets in the Milky Way ; SPACE RESEARCH and EXPLORATION: M.Sudārs. The Little Secret Space Shuttle Is Flying! ; M.Sudārs. Too Much Litter! Not in Rubbish Dump, but in the Space! ; “ENERĢIJA un PASAULE” VISITS “ZVAIGŽŅOTĀ DEBESS”: Talk with D…

Frīdriham Canderam – 125Asteroīds “Ikaunieks”Viesuļvētra Piena Ceļa binārajā sistēmā IGR J17091 – Čandras atradumsĢeologi par dzīvību uz Zemes – grāmataLVU astronomijas studenti – 1952.gada diplomandi (turpin.)Astronomiskās parādības – 2012.gada vasarāZvaigžņu mākonis LH 88 – Habla Paslēptie dārgumiSeminārs astronomijas skolotājiem7. debess vērotāju salidojums Suntažu observatorijāDalības saules pulksteņiJupitera konjunkcija ar Venēru martā“Enerģija un Pasaule” – “Zvaigžņotā Debess”Marss – slēptie ledājiPlanētu sistēma ap FomalhautuHermanim Ernstam Pflaumam – 150Molekulārais mākonis Vērša zvaigznājāKlinšainās planētas mūsu GalaktikāEzers “Džina krūka” Ziemeļkaukāzā – zemūdens ekspedīcijasZvaigžņu tēma mākslā – dzeja un zīmējumiAtkritumi kosmosā – problēmasLAB seminārs Ērgļa FīSpace Shuttle X-37BFiziķim Jurim Zaķim – 75Par Sauli pirms 100 gadiemDainis Draviņš par astronomiju"Mini planetārijs" Baldones observatorijā
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Science in space vs space science: The European utilisation of spacelab∗

1999

Abstract Spacelab is the conventional name given to a manned laboratory to be carried onboard NASA's Space Shuttle, which was built in Europe under the aegis of the European Space Agency (ESA). This paper deals with the initiatives undertaken in Europe to establish a utilisation programme for Spacelab, in particular for its first flight, planned as a joint ESA/NASA demonstration mission. Two main factors will be discussed, which prevented ESA from establishing a sizeable Spacelab utilisation effort. Firstly, owing to the cost escalation of the Spacelab development programme and to NASA's charging policy for access to the Shuttle system, which did not foressee any preferential treatment to E…

History and Philosophy of ScienceAeronauticsOperations researchCost escalationMember statesPolitical scienceAgency (sociology)Space ShuttleCommitSpace ScienceSpace (commercial competition)Preferential treatmentHistory and Technology
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Latvijas Zinātņu akadēmijas, Latvijas Universitātes Astronomijas institūta populārzinātnisks gadalaiku izdevums

2012

Contents: JĀNIS IKAUNIEKS – 100: N.Cimahoviča. Subjacent Was Venture ; I.P. Articles on Jānis Ikaunieks and Articles by Jānis Ikaunieks in Zvaigžņotā debess ; “ZVAIGŽŅOTĀ DEBESS” FORTY YEARS AGO: A.Balklavs. Ball Lightning and Solar Activity (abridged) ; Streamer with the USSR State Emblem on Mars (TASS materials) ; NEWS: I.Eglītis. Asteroid Baldone – Christmas Gift for Latvia ; I.Eglītis. LUAI Astrophysics Observatory Discovers First Trojan Asteroid ; V.Kalniņš. Exceeding Speed of Light in CERN Experiment from the Theory of Relativity Viewpoint ; O.Dumbrājs. Higgs Boson ; NOBEL PRIZE WINNERS: D.Docenko. Nobel Prize in Physics for Discovery of Accelerating Expansion of Universe ; SPACE RESE…

Jānis Ikaunieks - rakstiFrīdriha Candera piemineklis Šampētera ielā 2Ilgmārs Eglītis – ceļš uz astronomijuAstronomiskās parādības – 2012.gada pavasarīSaules pulksteņi arheoloģiskajos kultūrslāņosMārim Ābelem – 75Cilvēka evolūcija un astronomijaJānim Ikauniekam – 100Asteroīds “Baldone”Nobela prēmija fizikā 2011 – telpas paātrinātas izplešanās atklājumsMēness un Saules orbītu slīpumsGaismas ātrums CERN eksperimentāAgrim Jānim Kalnājam – 75Venēras tranzīts 5.jūn.2012.Komponists Ēriks Ešenvalds – astronomiskās tēmasSērskābais MarssIntegrālis Rumānijas skolēniemKārlim Žiglēvicam – 150Zvaigžņu tēma mākslā – dzeja un zīmējumiMedaļa – Saules aptumsums Latvijā 2011.01.04.Space Shuttle programma – noslēgums“Galileo” projekta zīmējumu konkurss – pavadonis LIENELatvijas “trojietis” 2011 QA450Astronomiski notikumi 2011.g. – Saules plankumi pilns Mēness aptumsumsMazā planēta 2010 GC158 = Nr. 284984 – “Ikaunieks”Higsa bozonsRotai Saveļjevai (Gūtmanei) – 90Imantam Platajam – 60Ieguvumi “Zvaigžņotās Debess” bibliotēkā (grāmatas žurnāli)Tumšā matērija – pazemē kosmosāVisuma izplešanās atklāšana – Ž.Lemetrs 1927.gadāLVU astronomijas studenti – 1952.gada diplomandi
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The atmospheric nightglow in the 300– wavelength

2002

Abstract The balloon-borne experiment, named BAckground BYpass (BABY) belongs to a wider program that has as its final goal the detection and study of high-energy cosmic rays from space (satellite, Space Station). An information of fundamental importance for this class of projects concerns the nighttime background light. The instrument designed to detect fluorescence photons is basically composed of two collimated photomultipliers: a single photon-counting PMT and a charge integration PMT. We briefly report the details of the design, operation and performance of the detector, which was designed and completely built at the IFCAI–CNR Institute in Palermo. Preliminary analysis and results of t…

PhysicsNuclear and High Energy PhysicsPhotomultiplierbusiness.industryDetectorAirglowSpace ShuttleCosmic rayParticle detectorCollimated lightOpticsSatellitebusinessInstrumentationRemote sensingNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Background Simulations of the Wide Field Imager of the ATHENA X-Ray Observatory

2011

The ATHENA X-ray Observatory-IXO is a planned multinational orbiting X-ray observatory with a focal length of 11.5m. ATHENA aims to perform pointed observations in an energy range from 0.1 keV to 15 keV with high sensitivity. For high spatial and timing resolution imaging and spectroscopic observations the 640x640 pixel^2 large DePFET-technology based Wide field Imager (WFI) focal plane detector, providing a field of view of 18 arcsec will be the main detector. Based on the actual mechanics, thermal and shielding design we present estimates for the WFI cosmic ray induced background obtained by the use of Monte-Carlo simulations and possible background reduction measures.

Physics::Instrumentation and DetectorsAstrophysics::High Energy Astrophysical PhenomenaCosmic background radiationSpace ShuttleFOS: Physical sciencesField of viewCosmic rayAstrophysics::Cosmology and Extragalactic Astrophysicslaw.inventionTelescopeOpticsObservatorylawNuclear electronicsAstrophysics::Solar and Stellar AstrophysicsFocal lengthImage resolutionInstrumentation and Methods for Astrophysics (astro-ph.IM)PhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)business.industryDetectorAstrophysics::Instrumentation and Methods for AstrophysicsCardinal pointElectromagnetic shieldingAstrophysics - Instrumentation and Methods for AstrophysicsAstrophysics - High Energy Astrophysical Phenomenabusiness
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Zvaigžņotā Debess: 2009, Pavasaris (203)

2009

Contents: E.R.Mustel, President of the Astronomical Council of the USSR Academy of Sciences. Congratulations to Editorial Board of “Zvaigžņotā debess” ; Z.Alksne. Gould’s Belt ; I.Daube. At the Radioastrophysical Observatory of the Latvian Academy of Sciences ; Z.Alksne, A.Alksnis. Lopsided Galaxies ; A.Alksnis. HII Region Gum 29 – a Stellar Nursery ; D.Docenko. On Collision of Asteroid 2008 TC3 with the Earth ; V.Lapoška. On „Leap Second” ; I.Vilks, M.Gills. Beginning of the International Year of Astronomy in Paris: Impressions by Latvian Delegates ; J.Jaunbergs. Equatorial Ridge on Iapetus ; M.Sudārs. Space Shuttle Is Not Likely to Retire Next Year ; I.Vilks. Planet Satellite Names in Lat…

Planētu pavadoņu latviskie nosaukumiHII apgabals Gum 29Saules aptumsums - novērojumi - 2008. gada 1. augusts RīgaPublikācijas par astronomijuSaturna pavadonis Japets – kalnu joslaGalileja tālskatis – ESA/NASA Habla Kosmiskais teleskopsAstronomija skolāZiemeļvalstu optiskais teleskops (Nordic Optical Telescope) Kanāriju salāsApsveikums „Zvaigžņotās debess” redakcijai„Liekā” sekundeDr.habil.phys. Juris Tambergs (1942-2008)Latvijas PSR ZA Radioastrofizikas observatorija – vēstureAicinājums astronomijas atbalstītājamRīgas Politehnikuma observatorijas tornis – vēstureStarptautiskais Astronomijas gads 2009Fizikas autodidakts Roberts KrastiņšSpirāliskās galaktikas – asimetrijaNovērojumi Rīgas Politehnikuma tornī - pirmā publikācijaĒrgļa Sigma seminārs – daļējs Mēness aptumsumsVisuma tēma filatēlijā – kosmiskās ēras sākumsSaules aptumsums - novērojumi - 2008.gada jūlijs SibīrijaPublisko demonstrējumu observatorija RāmkalnosDr.habil.math. Aivars Lorencs - intervijaAstronomiskās parādības - 2009Asteroīda 2008 TC3 sadursme ar ZemiNASA Space Shuttle programmas pagarinājumsLatvijas jauno matemātiķu izlase - 2008.gads“Noteikumi par līgumu starp Latvijas Republikas valdību un Eiropas Kosmosa aģentūru par sadarbību kosmosa jomā miermīlīgiem mērķiem” - projektsLU profesors Edgars Lejnieks (1919-1934)Jānis Klētnieks „Mūžības valdnieki”Ūdens marsiešiemLatvijas atklātā skolēnu astronomijas olimpiāde
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Optimal control of the atmospheric arc of a space shuttle and numerical simulations with multiple-shooting method

2005

This article, continuation of previous works, presents the applications of geometric optimal control theory to the analysis of the Earth re-entry problem for a space shuttle where the control is the angle of bank, the cost is the total amount of thermal flux, and the system is subject to state constraints on the thermal flux, the normal acceleration and the dynamic pressure. Our analysis is based on the evaluation of the reachable set using the maximum principle and direct computations with the boundary conditions according to the CNES research project\footnote{The project is partially supported by the Centre National d'Etude Spatiales.}. The optimal solution is approximated by a concatenat…

[ MATH.MATH-OC ] Mathematics [math]/Optimization and Control [math.OC]0209 industrial biotechnology49K15 70M2049M15Boundary (topology)Space Shuttlemultiple-shooting method02 engineering and technology01 natural sciencesAcceleration020901 industrial engineering & automationShooting methodMaximum principleControl theoryBoundary value problemcontrol of the atmospheric arc0101 mathematicsMathematicsmultiple-shooting method.Applied Mathematics010102 general mathematics[MATH.MATH-OC] Mathematics [math]/Optimization and Control [math.OC]Optimal controlHeat fluxModeling and SimulationOptimal control with state constraints[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC]
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