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Magnetohydrodynamic modeling of large-amplitude waves in the solar corona
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Year: 2012 Publisher: Helsingin yliopisto Helsingfors universitet University of Helsinki

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Solar eruptions are a consequence of the complex dynamics occurring in the tenuous, hot magnetized plasma that characterizes the solar corona. From a socio-economic viewpoint, solar eruptions can be argued to be the most important manifestation of the magnetic activity of the Sun due to their role as the main drivers of space weather, i.e., conditions in space that can have an adverse impact on space- as well as ground-based technologies such as telecommunication, electric power systems and satellite navigation. The launch of new space-based solar observatories during the past two decades has resulted in a dramatic improvement of the instrumentation monitoring the inner heliosphere. In spite of the advances in the observational capabilities, the physics of the solar eruptions as well as the nature of the various transient large-scale coronal phenomena observationally associated with the eruptions remain elusive. Constructing models capable of simulating the coronal and heliospheric^ dynamics is a viable path for gaining a more complete understanding of these phenomena. This thesis is concerned with developing a simulation tool based on the magnetohydrodynamic (MHD) description of plasmas and employing it for studying the characteristics of large-scale waves and shocks launched into the solar corona by the lift-off of a solar eruption such as a coronal mass ejection (CME). A particular focus is on discussing the role of large-amplitude waves in producing transient phenomena such as EIT waves and solar energetic particle (SEP) events that are known to appear in conjunction with CMEs. A suite of MHD models of the solar corona are constructed that allow the study of the coronal dynamics in varying environments at several stages of the eruption. For this purpose, novel robust numerical methods for solving the equations of magnetohydrodynamics in orthogonal curvilinear geometries in multiple dimensions are derived, forming the basis of the numerical simulation tool deve lop I det tunna och heta magnetiserade plasmat, som kännetecknar solens korona, uppkommer soleruptioner som en följd av den komplicerade dynamiken i plasmat. I och med eruptionernas roll som huvudorsakaren av rymdvädret kan man ur en socioekonomisk synvinkel anse att soleruptioner är den viktigaste manifestationen av solens magnetiska aktivitet. Med begreppet rymdväder förstås sådana förhållanden i rymden som negativt kan påverka teknologiska system såväl i rymden som på jorden, till exempel telekommunikation, elsystem och satellitnavigering. I och med att nya rymdbaserade solobservatorier tagits i bruk de senaste två decennierna har instrumentationen som observerar den inre heliosfären förbättrats dramatiskt. Trots framstegen i observationsmöjligheterna är fysiken bakom soleruptionerna samt karaktären av diverse tillfälliga storskaliga fenomen som observeras i koronan i samband med eruptionerna fortfarande svårfångad. Ett sätt att uppnå en mera komplett först åelse av dessa fenomen är att konstruera modeller som kan simulera koronans och heliosfärens dynamik. I denna avhandling har ett simulationsverktyg utvecklats och tillämpats för att studera globala vågor och chockvågor i solens korona orsakade av soleruptioner så som koronamassutkast. Simulationsverktyget grundar sig på den magnetohydrodynamiska (MHD) beskrivningen av plasmor. Ett bärande tema är att diskutera rollen av dessa vågor i uppkomsten av fenomen som observeras i samband med koronamassutkast, exempelvis så kallade EIT vågor samt utbrott av energetiska partiklar. En svit av MHD modeller av solens korona har konstruerats i avhandlingen. Modellerna möjliggör studiet av koronans dynamik i varierande förhållanden och olika skeden av eruptionen. För detta ändamål har numeriska metoder som löser magnetohydrodynamikens ekvationer i ortogonala kroklinjiga geometrier i flera dimensioner utvecklats. Dessa numeriska metoder utgör grunden för det nya simulationsverk tyget. Resultaten av modelleringen visar att en dynami


Book
De oorsprong en evolutie van leven : 15 van het standaardparadigma afwijkende thesen
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ISBN: 9054873612 9789054873617 Year: 2004 Publisher: Brussel VUBPress

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Hoe is leven ontstaan? Welke vorm nam het eerste leven aan?Hoe ontstonden de cellen waaruit ons lichaam is opgebouwd? Is natuurlijke selectie het enige mechanisme waarlangs evolutie zich voordoet? Wat bedoelde Darwin met natuurlijke selectie en gebruiken we deze definitie vandaag nog? Voltrekt evolutie zich traag of snel? Worden we gedetermineerd door onze genen? We stellen ons allemaal deze vragen wel eens. Wetenschappers worden echter algauw te technisch en filosofen te speculatief bij het beantwoorden ervan. Dit boek wil een brug slaan tussen de natuurwetenschappen en de menswetenschappen en de vragen omtrent de oorsprong en evolutie van leven, kritisch en nuchter, vanuit verschillende disciplines analyseren. Het resultaat is een huidige stand van zaken, leesbaar, zowel voor filosofen als wetenschappers en ook voor de leek. Vele van de voorgestelde antwoorden kunnen daarbij begrepen worden als aanvullingen, afwijkingen of alternatieven van het standaardparadigma in de biologie: de Moderne Synthese. Deze afwijkende stellingen werden gebundeld in 15 thesen. De vraag is in hoeverre de Moderne Synthese, in relatie met deze thesen, onderwerp voor herziening moet zijn.

Keywords

Evolution. Phylogeny --- Erfelijkheidsleer --- Hérédité --- Evolutieleer --- BPB0908 --- Darwin, Charles --- Philosophie --- Sciences physiques --- 575.8 --- RNA ribonucleic acid --- biologie --- cellen --- evolutie --- proteïnen --- Evolutie --- Filosofie --- Natuurwetenschap --- fyzikálne vedy --- физичке науке --- φυσικές επιστήμες --- xjenzi fiżiċi --- физически науки --- fizikalne vede --- füüsikateadused --- fyzikální vědy --- fysikaaliset tieteet --- физички науки --- nauki fizyczne --- naturvetenskap --- fiziniai mokslai --- shkenca fizike --- fysiske videnskaber --- eksaktās dabaszinātnes --- ciências físicas --- Physik --- natuurwetenschap --- fizică --- fizikai tudományok --- fizika i srodne znanosti --- ciencias físicas --- physical sciences --- scienze fisiche --- fysik --- fyzika --- fizika --- физика --- natuurkunde --- física --- füüsika --- physics --- fysica --- fizikë --- fysiikka --- φυσική --- physique --- fisica --- физика и сродни науки --- exakte Naturwissenschaften --- filosofija --- filosofie --- filozofija --- filosofia --- filozofie --- philosophy --- filosofía --- филозофија --- φιλοσοφία --- filosoofia --- filozofi --- filozofia --- filozófia --- философия --- filosofi --- gnozeologie --- humanisme --- dialektika --- ontologie --- гносеологија --- epistemologie --- дијалектика --- епистемологија --- umanesimo --- bölcselet --- онтологија --- noetika --- evolutieleer --- Provincie West-Vlaanderen --- eolaíochtaí fisiceacha --- fealsúnacht --- sciences physiques --- philosophie


Book
Le hasard : Une approche mathématique
Authors: ---
ISBN: 9782803637393 2803637391 Year: 2016 Volume: 6 Publisher: Bruxelles Larcier

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Probabilités, absence de certitudes, impossibilité de prévoir le futur, théorie du chaos... De tout temps, le hasard accompagne l'homme et ne cesse de le fasciner. Qu'en pense réellement un grand mathématicien ? Cette bande dessinée explique de façon simple et ludique le hasard et ses mystères ainsi que les stratégies qui peuvent aider à mieux appréhender les prévisions, la chance et les jeux de hasard !

Keywords

Hasard --- Chaos --- Probabilités --- Hasard - Bandes dessinées --- Chaos - Bandes dessinées --- Probabilités - Bandes dessinées --- mathématiques --- sciences physiques --- philosophie --- gnozeologie --- humanisme --- dialektika --- ontologie --- гносеологија --- epistemologie --- дијалектика --- епистемологија --- umanesimo --- bölcselet --- онтологија --- noetika --- filosofija --- filosofie --- filozofija --- filosofia --- filozofie --- philosophy --- filosofía --- филозофија --- φιλοσοφία --- filosoofia --- filozofi --- filozofia --- fealsúnacht --- filozófia --- философия --- Philosophie --- filosofi --- fysik --- fyzika --- fizika --- физика --- natuurkunde --- física --- füüsika --- physics --- fysica --- fizikë --- fysiikka --- φυσική --- physique --- fisica --- физика и сродни науки --- exakte Naturwissenschaften --- fyzikálne vedy --- физичке науке --- φυσικές επιστήμες --- xjenzi fiżiċi --- физически науки --- fizikalne vede --- füüsikateadused --- fyzikální vědy --- fysikaaliset tieteet --- физички науки --- nauki fizyczne --- naturvetenskap --- fiziniai mokslai --- shkenca fizike --- fysiske videnskaber --- eksaktās dabaszinātnes --- ciências físicas --- Physik --- natuurwetenschap --- fizică --- fizikai tudományok --- eolaíochtaí fisiceacha --- fizika i srodne znanosti --- ciencias físicas --- physical sciences --- scienze fisiche --- алгебра --- aritmetika --- logika --- géométrie --- algebra --- meetkunde --- geometrie --- логика --- геометрија --- gjeometri --- geomeetria --- γεωμετρία --- Geometrie --- geometry --- kombinatorika --- geometría --- geometria --- geometri --- geometrija --- matamaitic --- matemaatika --- математика --- matematica --- matematiikka --- matematik --- mathematics --- matematika --- μαθηματικά --- matematică --- wiskunde --- matemáticas --- matematyka --- matemātika --- Mathematik --- matematikë --- matemática --- mathématiques

Yearbook of science and the future.
Author:
ISSN: 00963291 ISBN: 0852290179 0852291450 0852291558 Year: 1968 Publisher: Chicago Encyclopaedia Britannica.

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Keywords

Science --- Sciences --- Yearbooks --- Annuaires --- Closed periodicals --- Annuaire --- Sciences physiques --- 5/6 <03> --- #ANTIL0010 --- Jaarboek --- Natuurwetenschap --- Exacte en toegepaste wetenschappen--Naslagwerken. Referentiewerken --- Bestelvoorstellen --- Techniek --- Wetenschappen --- Algemeen --- instellingen/algemene vakken --- encyclopedieën --- instellingen/algemene vakken. --- encyclopedieën. --- Instellingen/algemene vakken. --- Encyclopedieën. --- Lexica --- fyzikálne vedy --- физичке науке --- φυσικές επιστήμες --- xjenzi fiżiċi --- физически науки --- fizikalne vede --- füüsikateadused --- fyzikální vědy --- fysikaaliset tieteet --- физички науки --- nauki fizyczne --- naturvetenskap --- fiziniai mokslai --- shkenca fizike --- fysiske videnskaber --- eksaktās dabaszinātnes --- ciências físicas --- Physik --- natuurwetenschap --- fizică --- fizikai tudományok --- fizika i srodne znanosti --- ciencias físicas --- physical sciences --- scienze fisiche --- fysik --- fyzika --- fizika --- физика --- natuurkunde --- física --- füüsika --- physics --- fysica --- fizikë --- fysiikka --- φυσική --- physique --- fisica --- физика и сродни науки --- exakte Naturwissenschaften --- Jahrbuch --- metknygė --- annuario --- årbog --- vjetar --- rocznik --- évkönyv --- επετηρίδα --- yearbook --- gadagrāmata --- letopis --- årsbok --- godišnjak --- годишњак --- anuario --- annwarju --- годишник --- anuar --- ročenka --- vuosikirja --- jaarboek --- aastaraamat --- anuário --- almanacco --- annuaire officiel --- oficialioji metknygė --- úradná ročenka --- officiell årsbok --- Almanach --- almanak --- official yearbook --- almanahh --- алманах --- ametlik aastaraamat --- almanac --- oficiālā gadagrāmata --- oficiální ročenka --- kalendář --- vejviser --- annuario ufficiale --- anuário oficial --- анали --- επίσημη επετηρίδα --- anuario oficial --- almanachas --- хроника --- úřední ročenka --- virallinen vuosikirja --- almanaque --- almanach --- telefonbog --- αλμανάκ --- летопис --- anuar oficial --- statskalender --- almanah --- vjetar zyrtar --- amtliches Jahrbuch --- aikakausjulkaisu --- τηλεφωνικός κατάλογος --- Yearbooks. --- eolaíochtaí fisiceacha --- bliainiris


Book
Plastics Technology Handbook, Fifth Edition
Author:
ISBN: 1523113987 1351651927 1315155877 1498786227 9781315155876 9781498786225 9781523113989 1498786219 9781498786218 9781498786218 9781351642392 Year: 2017 Publisher: Boca Raton, FL : CRC Press,

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"Updated throughout to reflect advances over the last decade, the Fifth Edition continues the handbook's tradition of authoritative coverage of fundamentals, production methods, properties, and applications of plastics and polymer-based materials. It covers tooling for plastics fabrication processes, thermoplastics, thermosetting plastics, foamed plastics, reinforced plastics, plastisols, and new developments in mold design. It also discusses rubber compounding and processing technologies. More recent developments in polymer fabrication and processing, including electrospinning, electrografted coating, polymer-metal? hybrid joining, flex printing, and rapid prototyping/ 3D printing, are also presented. The handbook highlights advanced materials including natural and synthetic gfnanosize polymers, their unusual properties, and innovative applications, as well as polymer-carbon nanocomposites, graphene-based polymer nanocomposites, smart healable polymer composites, smart polymer coatings, electroactive polymers, polymer nanomaterials, and novel nano-/microfibrillar polymer composites. It offers updates on polymer solar battery development, plastics recycling and disposal methods, new concepts of "upcycling" and single-polymer composites, renewable synthetic polymers, biodegradable plastics and composites, and toxicity of plastics. The book also provides an overview of new developments in polymer applications in various fields including packaging, building and construction, corrosion prevention and control, automotive, aerospace applications, electrical and electronic applications, agriculture and horticulture, domestic appliances and business machines, medical and biomedical applications, marine and offshore applications, and sports. "--Provided by publisher.

Keywords

Plastics. --- muovi --- polymeerit --- valmistus --- ominaisuudet --- käsittely --- Plastic materials --- Plastic products --- Polymers --- Synthetic products --- Condensation products (Chemistry) --- Elastomers --- Plasticity --- kohdistuva toiminta --- esikäsittely --- jälkikäsittely --- jätteiden käsittely --- kuvankäsittely --- kylmäkäsittely --- lämpökäsittely --- materiaalinkäsittely --- pintakäsittely --- signaalinkäsittely --- vedenkäsittely --- äänenkäsittely --- kohtelu --- muokkaus --- prosessointi --- ominaisuus --- abstraktisuus --- agentiivisuus (kielitiede) --- ahtaus (ominaisuudet) --- aitous --- ajettavuus --- aktiivisuus --- aktivaatiotaso --- alkuperä --- alttius --- ambivalenssi --- anomaliat --- arvo --- aseptiikka --- asymmetria --- autenttisuus --- autoritaarisuus --- avoimuus --- biologiset ominaisuudet --- dynaamisuus --- edut --- eheys --- ekspressiivisyys --- elinvoimaisuus --- ennustettavuus --- epäjatkuvuus --- epävarmuus --- erilaisuus --- erot --- esiintyvyys --- esteettömyys --- frekvenssit --- funktionaalisuus --- fyysiset ominaisuudet --- geneerisyys --- haavoittuvuus --- harmonia --- heterogeenisuus --- hitaus --- homogeenisuus --- hygienia --- hyödyllisyys --- ikä --- itseohjautuvuus --- jatkuvuus --- joustavuus --- järjestys --- kapasiteetti --- kattavuus --- kauneus --- kausaliteetti --- kerrostuneisuus --- kesto --- kestävyys --- kielelliset ominaisuudet --- koherenssi --- kokeellisuus --- kokemattomuus --- kokeneisuus --- kokonaisvaltaisuus --- kompleksisuus --- konkreettisuus --- konteksti --- kontekstuaalisuus --- kontingenssi --- kontrasti --- korrelaatio --- korvaavuus --- kuolemattomuus --- kuolevaisuus (filosofia) --- kuolleisuus --- käsiala --- käytettävyys --- laajuus --- laatu --- layout --- levinneisyys --- liikkuvuus --- luotettavuus --- läheisyys --- lämmönsieto --- läpinäkyvyys --- löytyvyys --- maneerit --- materiaalisuus --- mentaaliset ominaisuudet --- mielekkyys --- modulaarisuus --- monikanavaisuus --- monimuotoisuus --- moninaisuus --- monipuolisuus --- moniselitteisyys --- monivaikutteisuus --- multimodaalisuus --- muoto --- muunneltavuus --- muunsukupuolisuus --- muutosvalmius --- narratiivisuus --- negatiivisuus --- niukkuus --- näkymättömyys --- näkyvyys --- näkökulma --- oikeellisuus --- optimaalisuus --- peittävyys --- perspektiivi --- poikkeavuus --- puhtaus --- puutteet --- pysyvyys --- rajat --- rakenne (ominaisuudet) --- reaaliaikaisuus --- reaktiivisuus --- relevanssi --- resilienssi --- resoluutio (kuvatekniikka) --- riippumattomuus --- riippuvuus --- riittävyys --- ristiriidat --- rooli (tehtävä) --- rumuus --- ruumiillisuus --- rytmi --- rytmiikka --- saatavuus --- saavutettavuus --- samanlaisuus --- sidonnaisuus --- sietokyky --- siirrettävyys --- soveltuvuus --- spontaanius --- stabiilius (muuttumattomuus) --- suhteellisuus --- suhteet --- sujuvuus --- sukupuolen moninaisuus --- sukupuoli --- suorituskyky --- symmetria --- syyllisyys --- taidot --- tarkkuus --- tarkoituksenmukaisuus --- tarkoitusperäisyys --- tarpeet --- tasapaino --- taso --- tehokkuus --- temporaalisuus --- terveellisyys --- todennäköisyys --- toiminnallisuus --- toimintakyky --- toimivuus --- toistettavuus --- totuudellisuus --- totuudenkaltaisuus --- transitiivisuus (matematiikka) --- transsukupuolisuus --- tuntomerkit --- tyhjyys --- ulkonäkö --- ulottuvuus --- universaalisuus --- uskontoon liittyvät ominaisuudet --- vaativuus --- vaihdettavuus --- vaihtuvuus --- vaikuttavuus --- vakaus (fysiikka) --- valikoivuus --- vapaaehtoisuus --- varmuus --- vastaavuus --- vetovoimaisuus --- viat --- visuaalisuus --- voimakkuus --- välttämättömyys --- yhdenmukaisuus --- yhteensopivuus --- yhteentoimivuus --- yhteiskunnalliset ominaisuudet --- yhtenäisyys --- ykseys --- yksinkertaisuus --- yksipuolisuus --- yksiselitteisyys --- ymmärrettävyys --- äänialat --- äärettömyys --- profiilit (tieto) --- valmistaminen --- kotivalmistus --- kuvanvalmistus --- massanvalmistus --- paperinvalmistus --- perhonsidonta --- pikavalmistus --- rahanlyönti --- ruoanvalmistus --- sopimusvalmistus --- tietokoneavusteinen valmistus --- uudelleenvalmistus --- polymeeri --- kemialliset yhdisteet --- biopolymeerit --- geopolymeerit --- hartsit --- kumi --- nanopolymeerit --- silikoni --- molekyylit --- oligomeeri --- muovit --- biomuovi --- jätemuovi --- kertamuovi --- kestomuovi --- lujitemuovi --- solumuovi --- uusiomuovi


Book
Neutron imaging : basics, techniques and applications
Authors: --- ---
ISBN: 981166272X 9811662738 Year: 2022 Publisher: Gateway East, Singapore : Springer,

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"This book comprehensively presents the concepts of neutron physics and imaging including neutron properties, neutron matter interaction, neutron imaging, comparison with X-ray and physics and design of neutron sources. It discusses how neutron imaging has gained importance as a powerful non-destructive technique to understand the internal structures of materials/engineered components in wide range of industries by increasing their applicability and efficiency. The book also covers the topics of neutron optics and detectors, basic principles of neutron radiography and tomography, related standards, safety, metrology and regulations in neutron imaging. The book presents applications of neutron imaging in the areas of aerospace industry, nuclear power and manufacturing industry, materials science and engineering, geomechanics, national security, biological, and medical domain. Given its scope, the book will be highly beneficial for postgraduate students, researchers and industry professionals working in the area of engineering and physics, especially non-destructive testing and non-destructive evaluation through neutron imaging."--Publisher.

Keywords

Neutron radiography. --- Neutrons. --- fundamental particle. --- optics. --- physical sciences. --- technology. --- particule élémentaire --- елементарна честичка --- elementarioji dalelė --- elemi részecske --- particella elementare --- elementarpartikler --- particulă elementară --- фундаментална частица --- Elementarteilchen --- cáithnín bunúsach --- temeljna čestica --- elementair deeltje --- elementārdaļiņa --- cząstka elementarna --- elementární částice --- alkeishiukkanen --- partikola fundamentali --- osnovni delec --- algosake --- základná častica --- основна честица --- partícula elementar --- στοιχειώδη σωματίδια --- partícula elemental --- elementarpartikel --- grimcë elementare --- proton --- fotão --- νετρόνιο --- elementariųjų dalelių fizika --- eletrão --- partiċella fundamentali --- fotoni --- électron --- footon --- neutronas --- electron --- неутрон --- elettrone --- perushiukkanen --- fotone --- neitrons --- fotonas --- Elektron --- ηλεκτρόνιο --- elektronas --- πρωτόνιο --- φωτόνιο --- elementary particle --- prooton --- фотон --- photon --- Neutron --- protonas --- nukleární částice --- elementárna častica --- protone --- електрон --- elektrons --- neutrón --- Proton --- electrón --- elementarna čestica --- elektron --- positron --- протон --- elektroni --- protoni --- protón --- Foton --- foton --- neutrão --- protons --- fotón --- neutrone --- neutron --- elementaarosake --- fotons --- neutroni --- elektrón --- protão --- основна честичка --- технология --- technológia --- teknik --- tecnologia --- technologija --- tehnoloogia --- tehnoloģija --- teknologi --- tehnologie --- tehnologija --- teknologia --- technologia --- teknoloġija --- τεχνολογία --- tecnología --- Technologie --- technologie --- teicneolaíocht --- teknologji --- технологија --- technický postup --- ingeniería --- inžinierstvo --- settore tecnologico --- technika --- egnet teknologi --- ingenjörsvetenskap --- ingénierie --- μηχανολογία --- engenharia --- инженерство --- inženýrství --- inžinerija --- engineering --- inženjering --- tehnika --- inženierpakalpojumi --- inginerie --- ingegneria dei sistemi --- inženierzinība --- inxhinieri --- fyzikálne vedy --- физичке науке --- φυσικές επιστήμες --- xjenzi fiżiċi --- физически науки --- fizikalne vede --- füüsikateadused --- sciences physiques --- fyzikální vědy --- fysikaaliset tieteet --- физички науки --- nauki fizyczne --- naturvetenskap --- fiziniai mokslai --- shkenca fizike --- fysiske videnskaber --- eksaktās dabaszinātnes --- ciências físicas --- Physik --- natuurwetenschap --- fizică --- fizikai tudományok --- eolaíochtaí fisiceacha --- fizika i srodne znanosti --- ciencias físicas --- scienze fisiche --- fysik --- fyzika --- fizika --- физика --- natuurkunde --- física --- füüsika --- physics --- fysica --- fizikë --- fysiikka --- φυσική --- physique --- fisica --- физика и сродни науки --- exakte Naturwissenschaften --- оптика --- ottica --- οπτική --- ótica --- optiikka --- optică --- ottika --- optaic --- optica --- optik --- Optik --- optikë --- optique --- optika --- optyka --- óptica --- fototecnica --- catadiottrica --- diottrica --- fénytan --- диоптрија --- Radiography, Industrial --- Thermal neutrons --- Atoms --- Baryons --- Matter --- Particles (Nuclear physics) --- Constitution

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