Dissertationen zum Thema „Glider analysis“
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Meyers, Luyanda Milard. „Analysis of lift and drag forces on the wing of the underwater glider“. Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2715.
Der volle Inhalt der QuelleUnderwater glider wings are the lifting surfaces of unmanned underwater vehicles UUVs depending on the chosen aerofoil sections. The efficiency as well as the performance of an underwater glider mostly depends on the hydrodynamic characteristics such as lift, drag, lift to drag ratio, etc of the wings. Among other factors, the geometric properties of the glider wing are also crucial to underwater glider performance. This study presents an opportunity for the numerical investigation to improve the hydrodynamic performance by incorporating curvature at the trailing edge of a wing as oppose to the standard straight or sharp trailing edge. A CAD model with straight leading edge and trailing edge was prepared with NACA 0016 using SolidWorks 2017. The operating conditions were setup such that the inlet speed varies from 0.1 to 0.5 m/s representing a Reynolds number 27.8 x 10ᵌ and 53 x 10ᵌ. The static pressure at different angles of attack (AOA) which varies from 2 to 16degrees at the increment of 2degrees for three turbulent models (K-Ԑ-standard, K-Ԑ-RNG and K-Ԑ-Realizable), was computed for upper and lower surfaces of the modified wing model using ANSYS Fluent 18.1. Thereafter the static pressure distribution, lift coefficient, drag coefficient, lift to drag ratio and pressure coefficient for both upper and lower surfaces were analysed. The findings showed that the lift and drag coefficient are influenced by the AOA and the inlet speed. If these parameters change the performance of the underwater glider changes as depicted by figure 5.6 and figure 5.7. The hydrodynamics of the underwater glider wing is optimized using the Cʟ/Cᴅ ratio as function of the operating conditions (AOA and the inlet speed). The investigation showed that the optimal design point of the AOA of 12 degrees and a corresponding inlet speed of 0.26m/s. The critical AOA matched with the optimal design point AOA of 12 degrees. It was also observed that Cp varies across the wing span. The results showed the Cp is higher closer to the fuselage while decreasing towards the mid-span and at the tip of the wing. This showed that the wing experiences more stress close to the fuselage than the rest of the wing span which implies that a higher structural rigidity is required close to the fuselage. The results of the drag and lift curves correspond to the wing characteristics typical observed for this type of aerofoil.
Barker, William P. „An Analysis of Undersea Glider Architectures and an Assessment of Undersea Glider Integration into Undersea Applications“. Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/17320.
Der volle Inhalt der QuelleRossouw, Pieter Stephanus. „The flutter analysis of the JS1 glider / P.S. Rossouw“. Thesis, North-West University, 2007. http://hdl.handle.net/10394/1944.
Der volle Inhalt der QuelleDe, Bruyn Jan Adriaan. „A preliminary theoretical flutter analysis of the JS1 glider / J.A. de Bruyn“. Thesis, North-West University, 2004. http://hdl.handle.net/10394/475.
Der volle Inhalt der QuelleThesis (M.Ing. (Mechanical Engineering))--North-West University, Potchefstroom Campus, 2005.
Perez, Sancha David. „CFD analysis of a glider aircraft : Using different RANS solvers and introducing improvements in the design“. Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-159995.
Der volle Inhalt der QuelleBrowne, Keith R. J. „The instrumentation and initial analysis of the short-term control and stability derivatives of an ASK-I3 glider“. Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/3631.
Der volle Inhalt der QuelleENGLISH ABSTRACT: This thesis describes the process followed to determine the short-term control and stability derivatives of an ASK-13 glider (ZS-GHB). The short-term control and stability derivatives are obtained by parameter estimation done using data recorded in flight. The algorithm used is the MMLE3 implementation of a maximum likelihood estimator. To collect the flight data sensors were installed in the ZS-GHB. Sensors measuring the control surface deflections, translation acceleration, angular rates and the dynamic and static pressure are needed to provide enough data for the estimation. To estimate accurate derivatives specific manoeuvres were flown by the pilot, to ensure that all the modes of the glider were stimulated. The results reveal that the control and stability derivatives estimated from the flight data are not very accurate but are still suitable to be used in simulating the glider's motion.
AFRIKAANSE OPSOMMING: Hierdie tesis beskryf die proses wat gebruik is om die kort periode beheer en stabiliteit afgeleides van 'n ASK-13 sweeftuig vas te stel. Die kort periode beheer en stabiliteit afgeleides is verkry deur parameter afskatting op data wat gedurend vlugte van die sweeftuig opgeneem is. Die algoritme wat gebruik is om die parameters af te skat is die MMLE3 voorstelling van 'n maksimale moontlikheid afskatter. Om vlug data te versamel sensore moes in die sweeftuig geinstalleer word. Die sensore meet beheer oppervlak hoeke, versnellings, hoeksnellhede en die dinamies en statiese lugdruk om te verseker dat daar genoeg data is vir die afskatting. Om die afgeskatte parameters akkuraad te kry moet die loods spesefieke manoeuvres vlieg om seker te maak dat al die moduse van die sweeftuig is gestimuleer. Die resultate wat gelewer is 'n stel kort periode beheer en stabiliteit afgeleides wat nie akkuraad is nie, maar wat weI goed genoeg is or ie bewegings van die sweeftuig te simuleer.
Browne, Keith R. J. „The instrumentation and initial analysis of the short-term control and stability derivatives of an ASK-13 glider /“. Link to the online version, 2004. http://hdl.handle.net/10019.1/3631.
Der volle Inhalt der QuelleFreisleben, Michal. „Výpočet zatížení a pevnostní kontrola křídla kluzáku“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228533.
Der volle Inhalt der QuelleMalinowski, Matěj. „Aerodynamická analýza měnitelné geometrie wingletu pro aplikaci na výkonném kluzáku“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318705.
Der volle Inhalt der QuelleKóňa, Marián. „Aerodynamický návrh transsonického bezpilotního kluzáku“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232008.
Der volle Inhalt der QuelleSun, Walter. „Analysis and interpretation of glide characteristics in pursuit of an algorithm for recognition“. Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/41010.
Der volle Inhalt der QuelleBendinger, Arne. „Marées internes autour de la Nouvelle-Calédonie : dynamique, interactions tourbillon-marée interne et challenge pour le satellite SWOT“. Electronic Thesis or Diss., Toulouse 3, 2023. http://www.theses.fr/2023TOU30336.
Der volle Inhalt der QuelleThe oceanic energy cascade and the associated redistribution of energy from planetary scales to microscales are crucial to achieve climate equilibrium, yet they remain to be fully understood and quantified. Among the submesoscale flow regime which is characterized by equal contributions from rotational (balanced) and non-rotational (unbalanced) effects, it is internal tides (internal gravity waves at tidal frequency) which have been shown to represent a major energy transfer toward dissipative scales. The Surface Water Ocean Topography (SWOT) satellite mission will push forward global sea surface height (SSH) observations of fine-scale physics of combined balanced and unbalanced motions, and their interactions. Our understanding of these processes will ultimately depend on our ability to disentangle these two different dynamical flow regimes. This thesis aims to tackle SWOT SSH observability of balanced and unbalanced motions around New Caledonia, an area with pronounced internal tide activity alongside elevated level of mesoscale to submescale eddy variability located beneath two swaths of SWOT's fast-sampling phase during which SWOT orbited on a 1-day repeat cycle to collect high-frequency measurements. As an initial step, this thesis provides the first comprehensive description of internal-tide dynamics around New Caledonia, an internal generation hot spot in the southwestern tropical Pacific that has not yet been explored in the literature, based on a tailored regional high-resolution (1/60°) numerical modeling effort. Internal tide generation around New Caledonia is associated with the main bathymetric structures, i.e. continental slope, shelf breaks, small- and large-scale ridges, and seamounts, strongly dominated by the semidiurnal tide and low-vertical modes, with a strong signature in SSH. It is found to be a major source of tidal energy propagation toward the open ocean despite enhanced energy dissipation rates close to the generation sites. Mesoscale eddy variability is shown to be a potential source for the loss of tidal coherence (or tidal incoherence) due to eddy-internal tide interactions, either through the refraction of tidal beam energy propagation by mesoscale currents toward the open ocean or by mesoscale-eddy induced variations of barotropic-to-baroclinic energy conversion. Important insight is provided by in-situ observations of autonomous underwater gliders. They reveal the numerical model's realism of internal-tide dynamics while proving to be a suitable in-situ platform to infer internal tides, including SSH signature. SWOT SSH observability of balanced and unbalanced motions represent a challenge around New Caledonia as the internal tide dominates SSH variance at wavelengths similar to those of balanced motion at scales less than 200~km wavelength. Particular emphasis is given to the incoherent tide, which manifests in SSH at scales less than 100~km, while restricting the observability of mesoscale and submesoscale motions. An outlook is given on the impact of internal tides on the mesoscale to submesoscale circulation with promising routes for future work on cross-scale energy exchanges and the closure of the oceanic energy budget. Finally, the comprehensive description of internal-tide dynamics conducted in this thesis has important implications for the New Caledonia marine ecosystem, with the hope of paving the way for the island's efforts in the conservation of marine protected areas
Smith, Justin L. „Computational analysis of airfoils in ground effect for use as a design tool“. Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5291.
Der volle Inhalt der QuelleTitle from document title page. Document formatted into pages; contains viii, 59 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 51-52).
Johnson, Matthew H. „Analysis, design and fabrication of a frangible tower for use with sideband reference glide slope systems“. Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1178308139.
Der volle Inhalt der QuelleLindberg, Martin. „Mode Matching Analysis of One-Dimensional Periodic Structures“. Thesis, KTH, Elektroteknisk teori och konstruktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231842.
Der volle Inhalt der QuelleI detta examensarbete, analyseras elektromagnetisk v°agutbredning i periodiskav°agledarstrukturer som uppvisar glid symmetri. Analysen genomf¨ordes genom enmod matchnings-teknik som korrelerar de olika mod-koefficienterna fr°an separeraderegioner i strukturen med varandra. Denna teknik anv¨ands f¨or att ta framdispersionsrelationen f¨or tv°a endimensionella periodiska strukturer: en glid symmetriskkorrugerad meta-yta och en koaxial ledare belagd med periodiskt urgr¨opdah°aligheter. Mod matchnings-formuleringen presenteras i Kartesiska och cylindriskakoordinatsystem respektive f¨or de ovan n¨amnda fallen. Mod matchnings-resultatenj¨amf¨ors med data-simulerade resultat erh°allna fr°an CST Microwave Studio och de¨overenst¨ammer v¨al med varandra.
Gualtieri, Marco. „In vivo analysis and manipulation of an invasive brain tumour“. Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS388.
Der volle Inhalt der QuellePrimary brain tumours are extremely aggressive, and often incurable. Interestingly, cells sharing many of the features of neural stem cells (NSCs) have been identified in several primary brain tumors. These cells are coined cancer stem cells (CSCs), and display self-renewal potential with illimited proliferation. Tumours strongly depend on a cellular microenvironment, which results in part from the remodelling of pre-existing populations, such as glial cells and blood vessels (the blood-brain barrier). The project uses the Drosophila Central Nervous System as an in vivo model to track brain tumors during the entire life of the host. The fly NSCs are a well-characterised stem cell model from which tumous can be generated during development, are CSC-driven and can survive and proliferate extensively during adulthood. In this system I can discriminate between different cell populations within the niche, and explore their behavior with respect to the CSCs during tumor growth. In particular I am interested in the mechanisms of cellular interactions happening in glial cells at the interface with the tumors. My results show that a sub-population of glial cells (cortex glia) undergoes apoptosis upon tumor growth, a mechanism that appears to promote tumor propagation. Interestingly, preventing cortex glia death leads to reduced tumor growth, suggesting that the tumour is at least in part required to eliminate glia to grow. In return, precocious killing of cortex glia favors tumor growth, pinpointing a reciprocal relationship between these two cell populations. Performing a transcriptional analysis of cortex glia during tumor growth has revealed multiple signalling pathways with a changing expression, and whose functional relevance is currently being assessed. In parallel, taking advantage of a published tumor transcriptome, I have selected several potential candidates mediating protein protein interactions at the interface between the tumour and the glia cells. Finally, I have also evaluated the role of known Rab proteins in the context of tumor development. This on-going work will shed light on how CNS tumors progress within and invade the healthy tissue
Alessandrini, Cameron. „Radiogenic Dating and Microstructure Analysis of Shear Zones Found Within the Seve Nappe Complex in the Åre Region, Jämtland, Scandinavian Caledonides“. Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-332954.
Der volle Inhalt der QuelleDen kaledoniska bergskedjan är en kontinent-kontinent kollison orogenes som återfinns i västra Skandinavien, Svalbard, Grönland och på de brittiska öarna. Bergskedjan har formats som ett resultat av en komplicerad historia av repeterad öppning och stängning av Iapetushavet. Skandinaviska kaledoniderna består av fyra allochthoner som täcker urberggrunden. Allochthonerna tros ha blivit transporterade hundratals kilometer i östlig riktning under den Skandiska kollisionen.För att kunna utreda den komplicerade historia som de skandinaviska Kaledoniderna har så har ett borrningsprojekt tagits fram under år 2014 med namnet “Collisional Orogeny in the Scandinavian Caledonides” (COSC). Det första skedet i projektet var att borra ett 2500 meter djupt borrhål för att ta prover från den undre Seveskollan som belägen i den mellersta allochthonen, samt den underliggande överskjutningszonen.Hypotesen är att den mellersta Seveskollan har placerats intill den undre Seveskollan då de befann sig i en subduktionskanal. Både mellersta och undre Seveskollan har placerats uppepå den underliggande bergsenheten något senare. För att testa hypotesen har Rb-Sr och Ar-Ar datering utförts på prover med vitt glimmer som tagits från skjuvzonen. Kompositionskartor av vitt glimmer påvisar inga uppenbara tecken på zonation, vilket innebär att glimmerkornen nyligen bildats eller omkristalliserats under skjuvning. Rb-Sr dateringen gav en ålder på 413 ± 12 miljoner år och Ar-Ar dateringen gav en ålder på424.1 ± 2.9 miljoner år. Detta tolkas som åldern på de omkristalliserade glimmerkornen.Resultatet har jämförts med tidigare åldersdateringar i samma område och påvisar en komplicerad subduktionshistoria. För 460 miljoner år sedan subducerade mellersta och undre Seveskollan under en öbåge. För ungefär 440 miljoner år började upplyftandet av de subducerade skollorna som ett resultat av bärkraften av den subducerande jordskorpan, även av tektoniska rörelser orsakad av en kilutdragning. För 424 miljoner år sedan blev mellersta Seveskollan placerad ovanpå undre Seveskollan när de befann sig i subduktionskanalen. Slutligen, för cirka 415 miljoner år sedan blev både den mellersta och undre Seveskollan upplyfta och transporterade i östlig riktning där de skjuvade över den underliggande Särvskollan och den undre allochthonen.Data från denna studie kommer att bidra till skapandet av en följdriktig modell av den mitt-Paleozoiskabergskedjebildningen och
Tatjana, Vulić. „Strukturna i katalitička svojstva sintetičkih, termički aktiviranih Mg-Al-Fe anjonskih glina“. Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 2006. https://www.cris.uns.ac.rs/record.jsf?recordId=71236&source=NDLTD&language=en.
Der volle Inhalt der QuelleLayered double hydroxides (LDHs) and derived mixed oxides with different Mg-Al-Fe content and extended aluminum substitution were investigated. High and low supersaturation precipitation methods were used for the synthesis of LDHs with general formula [Mg1-x M(III)x (OH)2](CO3)x/2 ⋅ mH2O where M(III) presents Al and/or Fe and x the content of trivalent ions, x = M(III) / [M(II) + M(III)], varied between 0.15 < x < 0.7. Iron-containing mixed oxides, suitable as catalysts for redox reactions, were formed after thermal activation - decomposition of LDH. Both, LDHs and derived mixed oxides were characterized with respect to crystalline structure (XRD), thermal stability (TG-DTA), textural (N2 adsorption), redox (H2 TPR) and acid-base properties (NH3 TPD) as well as the nature of the iron species (Moessbauer spectroscopy). It was demonstrated how preparation method and the extent of M(III) substitution influence the structure, surface and redox properties of LDHs and derived mixed oxides in correlation to catalytic properties in chosen test reactions (N2O decomposition and reduction with NH3). The catalytic behavior is mainly determined by the redox properties and the nature of the iron species in mixed oxides, but also by the structural properties of initial LDHs. It was confirmed that surface structure of intervalent Fe2+-Fe3+ iron active sites is crucial for the redox processes in chosen reactions. The strength of active sites is similar for all mixed oxides derived from LDH, but the differences in catalytic behavior arise from the differences in active sites accessibility. The best catalytic results were obtained when the stability of the initial LDH matrix was lowest e.g. when the amount of substituted M(III) was near the limit for the incorporation into LDH matrix (x = 0.5), especially for the sample synthesized with high superasaturation method containing a small amount of additional Al(OH)3 phase.
Sandmann, Dirk. „Method development in automated mineralogy“. Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2015. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-187215.
Der volle Inhalt der QuelleDie Forschung die der vorliegenden kumulativen Dissertation (‚Publikationsdissertation‘) zugrunde liegt wurde im Zeitraum 2011-2014 am Lehrstuhl für Lagerstättenlehre und Petrologie des Institutes für Mineralogie der TU Bergakademie Freiberg durchgeführt. Das primäre Ziel dieser Arbeit war es neue Einsatzmöglichkeiten für die Technik der Automatisierten Mineralogie im Gebiet der Lagerstättenkunde und Geometallurgie zu entwickeln und zu testen. Im Mittelpunkt der wissenschaftlichen Studien stand die analytische Nutzung des Großgerätes „Mineral Liberation Analyser“ (MLA) der Firma FEI Company. Dieses automatisierte System ist ein Bildanalysesystem und basiert auf der Erfassung von Rasterelektronenmikroskopiebildern und energiedispersiver Röntgen-spektroskopie. Mit Hilfe der MLA-Analysetechnik lassen sich sowohl statistisch gesichert quantitative mineralogisch relevante als auch Aufbereitungsprozess-relevante Parameter ermitteln. Die Analysen können sowohl an Locker- und Festgesteinen als auch an Erzen und Produkten der Aufbereitungs- und Recyclingindustrie durchgeführt werden. Infolge einer erstmaligen, breit angelegten und umfassenden Literaturrecherche von mehr als 1.700 Publikationen im Zusammenhang mit allen Arten von automatisierten REM-basierten Bildanalysesystemen konnten verschiedene Trends in der Publikations¬historie beobachtet werden. Publikationen mit Bezug auf die Aufbereitung mineralischer Rohstoffe führen das Gebiet der Automatisierte Mineralogie-bezogenen Publikationen an. Der Anteil der Aufbereitungs-bezogenen Publikationen an der Gesamtheit der relevanten Publikationen ist jedoch geringer als erwartet und zeigt eine signifikante Abnahme des prozentualen Anteils zwischen den Jahren 2000 und 2014. Letzteres wird durch eine kontinuierliche Einführung neuer Anwendungsbereiche für die automatisierte mineralogische Analyse, wie zum Beispiel in der Öl- und Gasindustrie, der Petrologie sowie den Umweltwissenschaften verursacht. Weiterhin wurde die Anzahl der Systeme der Automatisierten Mineralogie über die Zeit sorgfältig bewertet. Es wird gezeigt, dass sich der Markt von vielen einzelnen Entwicklungen in den 1970er und 1980er Jahren, die oft von Forschungsinstituten, wie z. B. CSIRO und JKMRC, oder Universitäten ausgeführt wurden, zu einem Duopol - Intellection Pty Ltd und JKTech MLA - in den 1990er und 2000er Jahren und schließlich seit 2009 zu einem Monopol der FEI Company entwickelte. Allerdings steigt die Anzahl der FEI-Konkurrenten, wie Zeiss, TESCAN, Oxford Instruments und Robertson CGG, und deren Konkurrenzsysteme seit 2011. Ein Schwerpunkt der drei von Experten begutachteten und in internationalen Fachzeitschriften publizierten Artikel dieser Studie war die Entwicklung eines geeigneten methodischen Ansatzes um die MLA-Technik für neue Materialien und in neuem Kontext zu verwenden. Die erzeugten Daten wurden mit Daten die von etablierten analytischen Techniken gewonnen wurden verglichen, um eine kritische Bewertung und Validierung der entwickelten Methoden zu ermöglichen. Dazu gehören sowohl quantitative mineralogische Analysen als auch Methoden der Partikelcharakterisierung. Der Schwerpunkt der Studie zum ersten Fachartikel „Use of Mineral Liberation Analysis (MLA) in the Characterization of Lithium-Bearing Micas“ liegt im Gebiet der Aufbereitung mineralischer Rohstoffe. Er beschreibt die Charakterisierung von Zinnwaldit-Glimmer - einem potentiellen Lithium-Rohstoff - durch die MLA-Technik sowie das Erringen von Mineralverwachsungsdaten für Zinnwaldit und assoziierter Minerale. Dabei wurden zwei unterschiedliche Wege der Probenzerkleinerung des Rohstoffes untersucht. Zum einen erfolgte eine konventionelle Zerkleinerung der Proben mittels Brecher und Mühle, zum anderen eine selektive Zerkleinerung durch Hoch¬spannungsimpulse. Es konnte aufgezeigt werden, dass die automatisierte Rasterelektronen¬mikroskopie-basierte Bildanalyse mittels MLA von silikatischen Rohstoffen Mineral¬informationen von hoher Güte zur Verfügung stellen kann und die Ergebnisse gut vergleichbar mit etablierten analytischen Methoden sind. Zusätzlich liefert die MLA weitere wertvolle Informationen wie zum Beispiel Partikel-/Mineralkorngrößen, Aussagen zum Mineralfreisetzungsgrad sowie Gehalt-Ausbring-Kurven des Wertstoffes. Diese Kombination von quantitativen Daten kann mit keiner anderen analytischen Einzelmethode erreicht werden. Der zweite Fachartikel „Characterisation of graphite by automated mineral liberation analysis“ ist ebenfalls im Fachgebiet der Aufbereitung mineralischer Rohstoffe angesiedelt. Während dieser Studie wurden Edukte und Produkte der Aufbereitung von Graphit-Erzen untersucht. Der vorliegende Artikel ist der erste in einer internationalen Fachzeitschrift publizierte Beitrag zur Charakterisierung des Industrieminerals Graphit mittels MLA-Technik bzw. einer Analysenmethode der Automatisierten Mineralogie. Mit der Studie konnte gezeigt werden, dass es möglich ist, auch mit der MLA statistisch relevante Daten von Graphitproben zu erfassen. Darüber hinaus wurden die Ergebnisse der MLA-Analysen durch quantitative Röntgenpulverdiffraktometrie sowie Partikelgrößen-bestimmungen durch Laserbeugung und Siebanalyse validiert. Der dritte Fachartikel „Nature and distribution of PGE mineralisation in gabbroic rocks of the Lusatian Block, Saxony, Germany“ ist im Gegensatz zu den ersten beiden Artikeln im Gebiet der Geowissenschaften angesiedelt. In dieser Studie wird gezeigt, dass es möglich ist mittels MLA-Analyse eine signifikante Anzahl neuer Daten von einem eigentlich schon gut untersuchten Arbeitsgebiet zu gewinnen. So konnte erst mit der MLA die komplexe Natur und relativ große Verbreitung der auftretenden Platingruppenelement-führenden Minerale (PGM) geklärt werden. Während früherer lichtmikroskopischer Analysen und einzelner Elektronenstrahlmikrosonden-Messungen konnten nur eine Handvoll weniger, isolierter PGM-Körner nachgewiesen und halbquantitativ charakterisiert werden. In der vorliegenden Studie konnten nun, an den von früheren Studien übernommenen Proben, 7 PGM-Gruppen und 6 assoziierte Telluridmineral-Gruppen mit insgesamt mehr als 1.300 Mineralkörnern beider Mineralgruppen nachgewiesen werden. Auf der Grundlage der gewonnenen Daten wurden wichtige Erkenntnisse in Bezug auf Mineralassoziationen, Mineralparagenese und zur möglichen Genese der PGM erreicht. In diesem Zusammenhang wurde der Wert der MLA-Studien für petrologische Forschung mit dem Fokus auf Spurenminerale dokumentiert. Die MLA liefert Ergebnisse, die sowohl umfassend und unvoreingenommen sind, wodurch neue Einblicke in die Verteilung und Charakteristika der Spurenminerale erlaubt werden. Dies wiederum ist ungemein nützlich für die Entwicklung neuer Konzepte zur Genese von Spurenmineralen, kann aber auch zur Entwicklung einer neuen Generation von Explorationswerkzeugen führen, wie zum Beispiel mineralogische Vektoren zur Rohstofferkundung ähnlich wie derzeit verwendete geochemische Vektoren. Mit der vorliegenden Dissertationsschrift wird aufgezeigt, dass Automatisierte Mineralogie mittels Mineral Liberation Analyser eine einzigartige Kombination an quantitativen Daten zur Mineralogie und verschiedene physikalische Attribute, relevant sowohl für die Lagerstättenforschung als auch für die Aufbereitung mineralischer Rohstoffe, liefern kann. Im Vergleich zu anderen etablierten analytischen Methoden sind es insbesondere die Automatisierung und Unvoreingenommenheit der Daten sowie die Verfügbarkeit von Gefügedaten, Größen- und Forminformationen für Partikel und Mineralkörner, Daten zu Mineralassoziationen und Mineralfreisetzungen welche die großen Vorteile der MLA-Analysen definieren. Trotz der Tatsache, dass die Ergebnisse nur von polierten 2-D Oberflächen erhalten werden, lassen sich die quantitativen Ergebnisse gut/sehr gut mit Ergebnissen anderer Analysemethoden vergleichen. Dies kann vor allem der Tatsache zugeschrieben werden, dass eine sehr große und statistisch solide Anzahl von Mineralkörnern/Partikeln analysiert wird. Ähnliche Vorteile sind bei der Verwendung der MLA als effizientes Werkzeug für die Suche und Charakterisierung von Spurenmineralen von petrologischer oder wirtschaftlicher Bedeutung dokumentiert
Kankate, Laxman. „Light emitting organic nanofibers from para-phenylene and alpha-thiophene oligomers“. Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2008. http://dx.doi.org/10.18452/15775.
Der volle Inhalt der QuelleBy using organic molecular beam epitaxy (OMBE) blue, green and orange light emitting organic nanofibers or nanoneedles and microrings from para-hexaphenyl (p-6P), alpha-quaterthiophene (alpha-4T) and alpha-sexithiophene (alpha-6T), respectively, on muscovite mica surfaces are generated. The aggregates are characterized by atomic force microscopy, fluorescence microscopy and UV-vis spectroscopy. On muscovite mica, p-6P fibers usually grow mutually parallel showing two domains of their orientations with an angle of 120 degree in between. The detail growth of nanofibers from p-6P by performing a systematic statistical analysis of fibers as a function of various growth conditions is discussed. Furthermore, the morphology exhibits p-6P clusters, which are found to be fibers´ building blocks. A real space model of the fiber and a model for their growth are also presented. By introducing a thin gold layer on mica prior to p-6P deposition together with varying growth parameters, the morphology of fibers is controlled in a wide range (length from 0.5 micrometer to 1 mm, height from 25 to 300 nm and width from 100 to 600 nm). In contrast to p-6P, thiophene fibers exhibit various orientations close to mica high symmetry directions. It is shown that the mechanism behind the fiber growth from all molecules on mica is the same, i.e. a combination of epitaxy and dipole assisted growth process. The fiber microscopic structures are similar, too: molecules take lying orientations and they hold themselves parallel pointing their long axes along an oblique direction off the long fiber axis. The growth of both types of oligomers on water or methanol treated mica surfaces leads to the formation of bent fibers and microrings. This surface pretreatment and the growth of p-6P on gold/mica support the fiber growth mechanism on plain mica.
Li, Wei-Ta, und 李威達. „Hydrodynamic Analysis of Underwater Glider with Installation of CTD“. Thesis, 2008. http://ndltd.ncl.edu.tw/handle/33602368989885553447.
Der volle Inhalt der Quelle國立臺灣大學
工程科學及海洋工程學研究所
96
Autonomous Underwater Glider is a new invention of Autonomous Underwater Vehicle (AUV) in recent years. Underwater Glider has long duration and long range, especially for an apparatus is called CTD sensor that could also collect many physical data of the ocean. Most of CTD sensors are placing for underneath one side of wing of underwater glider therefore the dynamic characteristics of an underwater glider depends on its hydrodynamic coefficients significantly. The variety of geometry has extremely effect to hydrodynamic coefficients, so it is important to estimate or analyze the difference between hydrodynamic coefficients which has the set of CTD sensor or not of underwater glider. The computation of fluid dynamics software “FLUENT” is used for this study. In order to make sure the numerical approaches and mesh arrangement in determining the hydrodynamic coefficients of an underwater glider are appropriate. The first stage is using the data of 4621 axial symmetric submerged body reported by DTNSRDC to simulate the hydrodynamic coefficients. As the result of 4621 simulation is closed to experimental data, then we can use the same numerical approaches and mesh arrangement to calculate the hydrodynamic coefficients of underwater glider at angles of pitch from -25 to +25 degrees which has CTD sensor or not.
Li, Chien-Yi, und 李建億. „Parametric Design of Geometric Shape and Analysis of Performance of Underwater Glider“. Thesis, 2008. http://ndltd.ncl.edu.tw/handle/77203107098129646144.
Der volle Inhalt der Quelle國立臺灣大學
工程科學及海洋工程學研究所
96
Autonomous underwater glider is a kind of underwater vehicles which is suitable for measuring and collecting large-scale underwater hydrographic information. The gliding principle of an underwater glider is being means of buoyancy engines to inside the glider control a ballast tank for intaking and expelling water. Thereby, difference between buoyancy and weight, and also difference in distance between center-of-buoyancy and center-of-gravity can be produced. These differences will result in an inclination and up-and-down motion of the fuselage. Furthermore, in cooperation with shifting and rotating of the internal moving weight and control of the operable rudder for producing pitch , roll and yaw motion. The purpose of this study is to develop a computer-aided design tool for an underwater glider. Rhino is a commercial CAD software which provides software development kit for building up a design tool to meet special purpose. One can use this development kit to connect with functions of Rhino, assemble different existing programs and export various information such as volume, mass, coordinates of center-of-buoyancy, and center-of-gravity, etc. Besides, the tool exports some files including engineering drawing, three dimensions solid model, Microsoft excel charts, and animation of simulating results for glider motion, etc. The designer can use this information to enhance efficiency for design work and reduce computation errors, so the time needed for design of an underwater glider can be shortened to a large extent.
Pottas, Johannes. „A numerical investigation of the crashworthiness of a composite glider cockpit / J.J. Pottas“. Thesis, 2015. http://hdl.handle.net/10394/15921.
Der volle Inhalt der QuelleMIng (Mechanical Engineering), North-West University, Potchefstroom Campus, 2015
Guo, Ming-Feng, und 郭名峰. „A study on the Analysis of Performance and Simulation for the Maneuvering Motions of Underwater Glider“. Thesis, 2007. http://ndltd.ncl.edu.tw/handle/73437522405622162149.
Der volle Inhalt der Quelle臺灣大學
工程科學及海洋工程學研究所
95
In order to investigate the dynamic characteristics of an autonomous underwater glider, which is under developing in National Taiwan University, it’s necessary to develop a tool to simulate its maneuvering motions. In the present study, modular modeling is adapted to construct the mathematical model for the 6 degree of freedom of maneuvering motions of an AUG for the sake of easy application of existing database or empirical formula in estimating the hydrodynamic forces of elements, such as fuselage, wings, stern vertical fin and interaction among them, at preliminary design stage. It’s a similar way as MMG mathematical model to simulate ship maneuvering motions. In numerical simulation, the derived nonlinear equations of motions are linearized for obtaining the equations that governing the increment of motions at each time step, and then the solved motions increments are integrated and the coupled nonlinear motions of 6 degree of freedom are simulated. Firstly, the dynamic performances of vertical motions of the two types of underwater gliders were investigated by simulation. One type is controlled by longitudinal moving weight and buoyancy engine located fore, another type is controlled by two buoyancy engines located fore and aft but without longitudinal moving weight. Then the effects of main wing location to the dynamic performances are investigated. Finally, the coupled nonlinear motions of 6 degree of freedom controlled by rolling a transverse moving weight were simulated, and applied to investigate the effects of the locations of main wing and vertical tail fin to lateral stability and turning ability. It was confirmed that the simulation tool developed in the present study may be used as a practical tool for designing an underwater glider in the preliminary design stage.
Cai, Min-Yu, und 蔡旻育. „Hydrodynamic Analysis ofUnderwater Gliders“. Thesis, 2007. http://ndltd.ncl.edu.tw/handle/32261359821904929970.
Der volle Inhalt der Quelle臺灣大學
工程科學及海洋工程學研究所
95
Autonomous Underwater Glider (AUG) is a novel kind of autonomous underwater vehicle that has very long range and very long duration. An underwater glider is driven by buoyancy engine which could change net buoyancy by expelling or infusing water, and moving weight. Since the dynamic characteristics of an underwater glider depend on its hydrodynamic coefficients significantly, it’s important to analyze or estimate the hydrodynamic coefficients with accuracy enough. In the present study, the CFD commercial software FLUENT was used to analyze the flow field and determine the hydrodynamic coefficients of an underwater glider. In order to confirm the numerical approaches and mesh arrangement in determining the hydrodynamic coefficients of an underwater glider are appropriate, a comparison calculation was carried out firstly using the experimental data of 4621 axial symmetric submerged body tested by DTNSRDC and NTU. Then the same numerical approaches and mesh arrangement are applied to an underwater glider to determine its hydrodynamic coefficients. Estimation using DATCOM database is also examined by comparing with the CFD results using FLUENT.
Peng, Hsiente, und 彭賢德. „The Biomechanical Analysis of Rotational and Glide Shot put Technique“. Thesis, 2003. http://ndltd.ncl.edu.tw/handle/47367748069688026593.
Der volle Inhalt der Quelle國立臺灣師範大學
體育學系
91
Purpose: The purpose of this study was to analyze performances of two male shot-putters who use the rotational and glide technique, to compare the two techniques and to compare them with world-level shot-putters. Three-dimensional analysis method was used. Method: Two Redlake high-speed digital cameras (125Hz) were genlocked to record the three-dimensional shot put motions. The images were digitized by KWON 3D motion analysis system. Conclusions: The main factor affecting the subjects’ releasing velocities is that their rotational throwing movements of preparation and delivery cannot increase the shot velocities. Better shot-putter who used rotational technique prone to have larger toque. A shot-putter who had better performance had larger velocity-change at thrusting. Rotational technique got more angular momentum of body than glide technique. Suggestions: In rotational technique aspect: Accelerating the shot from the preparative duration. Increasing the velocity-change in the duration of delivery and thrusting. In glide technique aspect: Increasing the velocity of the shot at left foot first breaking the contact of the ground. Enhancing the fluency during delivery to accelerate the shot.
Lin, Wu-Chen, und 林武城. „The Biomechanical Analysis of Glide Hitting and Kick Hitting in Baseball“. Thesis, 2005. http://ndltd.ncl.edu.tw/handle/41915433197835977770.
Der volle Inhalt der Quelle國立台北師範學院
體育學系碩士班
93
The Biomechanical Analysis of Glide Hitting and Kick Hitting in Baseball Abstract The purpose of this study were to analyze the biomechanical characteristics of glide and kick hitting in baseball which exerted by professional baseball players in Taiwan. Five professional baseball players were selected as the subjects, which body information in average were 29±1.78 in years, 176.4±4.03 cm in height, 78.6±4.15 Kg in weight. The experiment used two JVC-DV 9800 high-speed digital cameras(120Hz)and one AMTI force plate(1200Hz). The video data was treated by Kwon3D 3.0 motion analysis system. After processing direct linear transformation, we could get actual coordinate data of individual joints. First, the raw data was filtered by which called Butterworth Fourth-order Zero Lag Digital Filter. Thus we could get all of the kinematical parameters include all joint angle and the horizontal displacement of the body center of gravity. Second, processing the calibration of the force plate. We used the software of DASY Lab 6.0 to transfer the voltage data into Newton(nt). Next, getting the ground reaction force in three axial directions, we built a module in DASY Lab 6.0 to smoothen the raw data with Butterworth low-pass filter. The following are the main results: 1. In kick hitting, the moving forward velocity of bat is the highest when the ball was hit at the right moment, which the left elbow angle is almost 180 degrees and the right elbow angle is between 100-110 degrees. In the hitting process, the displacement of body in backward/forward direction and the resultant velocity with kick hitting are larger than those with glide hitting. In the stride phase, the average angle of left hip and knee joint with glide hitting is smaller than that with kick hitting. The kick hitting withdrawing the forefoot makes the angle of hip and knee small and transfers the body weight distribution. 2. The initial velocity of the ball affects the ball flight distance. In the kick hitting, the average swing velocity is 21.27±0.533m/s and the average instant velocity at hitting moment is 20.37±0.72m/s. The average value with kick hitting is larger than that with glide hitting. Therefore, the faster the swing velocity is, the faster the ball initial velocity is. 3. In all the hitting motion, the force in vertical direction is lager in back-foot during the stance phase. With motion processing, the force move toward forefoot. The largest force of the forefoot in vertical and horizontal direction appears right before the ball hitting moment. And the average value of kick hitting is larger than glide hitting. The reason comes from the different lifting height and the different exerting force. The player exerts the force to ground and to affects all the body segmental to use the ground reaction force to make body rotation and then transfer the force to the bat. 4. The kick hitting could get better rotation benefit and optimum. In the stride phase, angular momentum of the body is increasing by body inertia .In the rotation phase, the velocity increasing of the body center of gravity makes the angular momentum increase. The largest angular momentum appears right before the ball hit. Because the body inertia in ball hitting moment was very small, the angular momentum was mainly affected by angular velocity. In the phase, the average value, largest value and hitting moment value of angular momentum with kick hitting are larger than those with glide hitting. Therefore, the kick hitting could get larger linear and angular momentum. Conclusion:First, in kick hitting, the bat moving forward velocity is the highest when the ball was hit at the right moment, which the left elbow angle is almost 180 degrees. Second, lifting the fore-foot could increase the velocity of body of gravity and hitting velocity. Third, the ground reaction force and body angular momentum in the rotational phase with kick hitting are larger than those in glide hitting. Thus, the hitting velocity, initial velocity of ball and ball velocity at hitting moment with kick hitting are better than those in glide hitting. Therefore, the kick hitting with larger ground reaction force makes the body get faster rotation velocity, more linear momentum and angular momentum.
Lu, I.-Ting, und 盧怡婷. „Analysis and Interpretation of Glière Concerto for Horn“. Thesis, 2008. http://ndltd.ncl.edu.tw/handle/j3k7ud.
Der volle Inhalt der QuelleNguyen, Ngoc-Thuy Dang. „Performance Analysis of Skip-Glide Trajectories for Hypersonic Waveriders in Planetary Exploration“. 2008. http://trace.tennessee.edu/utk_gradthes/416.
Der volle Inhalt der QuelleChang, Wen-huei, und 張文慧. „Yami (Tao) Phonemic System, Syllabification, and the Analysis of Vowel-glide Interaction“. Thesis, 2016. http://ndltd.ncl.edu.tw/handle/46294212976797369214.
Der volle Inhalt der Quelle國立清華大學
語言學研究所
104
This thesis gives an overview of the Yami phonemic inventory, syllabification, stress, and the interaction of vowel-glide sequences. The three topics are interrelated to each other. This thesis is divided into three parts. The first part discusses the phonemic status of segments through phonological, morphological, and historical evidence. The phonemic statuses of the affricates and pharyngeal segments are the focuses. Yami syllable structure and their constraints for derived syllables [CGV(C)] are depicted in the second part. The third part introduces the underlying glides and derived glides in the OT framework. The voiced uvular fricative /ʁ/ is proved to block vowel deletion in /aʁa/ sequence. Tautosyllabic consonant clusters do not exist in Yami. Epenthesis, affixation or cross-morphemic resyllabification are ways for Yami to repair ill-formed syllables. As for derived syllables, a potential acoustic account for onset and the following vocalic glide [w] in derived syllable [CwV(C)]. I assume that [t͡ɕjV(C)] or [d͡z jV(C)] syllables are developed from optionally derived syllable [CjV(C)] of /CVV(C)/ but now the affricate is phonemic and [CjV(C)] is the surface form of /CV(C)/. It implies that the [CjVC] syllable causes affricates to go through phonemicization, and the glide [j] therefore becomes a transitional segment. It is likely for [ɲ, ɕ, ɮ] becoming phonemic in the future because /n, ʂ, l/ have tendency to form [CjV(C)] syllable. In the third part, the underlying glides and the derived glides are delineated and distinguished. The hierarchy of OT constraints accounts for how underlying glides, epenthetic glides, and vocalic glides interact in prosodic words. The consistent [vocalic] feature and the syllable position are correlated: the [vocalic] feature of the segment determines the segment’s position in a syllable; the [vocalic] feature of an epenthetic glide must fit the syllable structure.
Meng-TzuHu und 胡孟慈. „Biomechanical Analysis and Model Construction of the Thumb during Simulated Posteroanterior Glide Manipulation“. Thesis, 2017. http://ndltd.ncl.edu.tw/handle/8hzcvw.
Der volle Inhalt der Quelle國立成功大學
醫學工程研究所
105
Manual therapists frequently employ manual techniques such as posterior/anterior (PA) glide techniques to treatment patient with joint hypomobility disorders. Such tasks involve force generated at the tip of the thumb with the relevant muscles assuming the role of stabilizers for the multiarticular chain of the thumb. However, the exact roles of thumb muscles and kinematics while performing manual tasks are not clear. This part of the study had three objectives: (1) To investigate the effect of the experience and different techniques on kinematics and kinetics while performing three posteroanterior (PA) glide mobilization techniques. (2) To investigate the effect of the IP joint flexibility (hitchhiker’s thumb or not) and techniques (two PA glide mobilization and two pinch tasks) on thumb biomechanics. (3) To construct a biomechanical model to estimate forces acting on the joints and individual muscles of the thumb. In part1 (chapter 2), 23 novice participants without any exposure to manual therapy and 15 physical therapists with at least 3 years of orthopedic experience participated. Each participant exerted maximum thumb-tip force on a 6-axis load cell with three different posterior-anterior (PA) glide techniques including unsupported PA glide (T1), PA glide with digits supported (T2) and PA glide with thumb interphalangeal (IP) joint supported by index finger (T3). Surface electromyographic activities of flexor pollicis brevis (FPB), adductor pollicis (ADP), abductor pollicis brevis (APB), and first dorsal interosseus (1stDI)) and kinematics of each thumb joint were collected for analyses. The magnitude of the thumb-tip force generated is influenced not only by the differences in technique employed by the therapists, but also by the general flexibility of the therapists. While participants of both groups generated the same magnitude of force, experienced participants generated less intrinsic muscle activity with a more flexed position at the CMC joint during PA glide mobilization. Novice participants increased activity of their intrinsic muscles in accordance with the stability status of the technique and performed with the CMC angles closer to the neutral position. Physical therapists with excessive thumb flexibility are advised to perform PA glide with IP joint supported (T3) which generated a greater tip force and was more stable among the three techniques employed in the present study. It produced the smallest relative errors in the thumb tip force generated and was executed in a more flexed position in the metacarpophalangeal (MCP) joints. In part 2 (Chapter 3), 33 apparently healthy young participants (hitchhiker group: 8 males and 8 females; non-hitchhiker group: 8 males and 9 females) participated. Each participant exerted 1) thumb tip force on a 6-axis load cell from 25% to 100% maximum force at a 25% increments with two PA glide techniques (unsupported PA glide, T1, and PA glide with digits support, T2); and 2) tip pinch and lateral pinch tasks on a single axis load cell. Surface EMG of extensor pollicis longus (EPL), extensor pollicis brevis (EPB), flexor pollicis longus (FPL), flexor pollicis brevis (FPB), adductor pollicis (ADP), abductor pollicis longus (APL), abductor pollicis brevis (APB), and first dorsal interosseus (1stDI) were collected. Signficant main effects of technque on normalized thumb-tip force generated and on normalized EMG at all force levels except at 25% of maximum were shown. No obvious group (with or without hitchhiker’s thumb) difference (F=0.894, p=0.352) were revealed. While executing pinch tasks, FPL is required to help distal phalanx of the thumb to resist the forces exerted by the index. A greater ADP EMG activity was observed as it serves as a prime mover and is in a mechanically advantageous position. The EMG activity level of the FPB, FPL and ADP suggest that these muscles assume the roles of prime movers in pinch type of activities. However, their roles change to that of stabilizers during the performance of PA glide techniques. Non-hitchhikers seem to be more capable of maintaining the thumb in more neutral position. In part 3 (Chapter 4), a biomechanical model was constructed to estimate joint constraint forces and individual muscle forces while performing unsupported PA glide (T1) and PA glide with digits support (T2). The mobilization technique results in a greater volar-ulnar directed force at the MCP joint and the largest contact forces were found at CMC joint in both groups. In both techniques, larger joint contact force in all three joints and smaller muscle forces (especially FPB, APB, EPB) were estimated in the Experienced Group than the Novice Group. This model, however, failed to estimate a muscle force pattern consistent with the activation pattern of the thumb muscles identified by surface EMG.
Chen, Chau-Fu, und 陳朝福. „The Kinematics Analysis of Rotational and Glide Shot Put Techniqne of Elite Males Shotputter“. Thesis, 2015. http://ndltd.ncl.edu.tw/handle/399vf6.
Der volle Inhalt der Quelle國立中正大學
運動與休閒教育研究所
103
Purpose: The study was to analysis the crucial kinematics between both of the difference shot put technique at the double-support phase, throwing phase and release phase, and the correlation analysis with the crucial kinematics among the different shot put technique. Methods: By using a camera to capture the throwing motion of the 8 elite shot putters. The 2-D video of the digital and raw data smoothing are using the Kwon 3D motion analysis system. To calculate the step-length, release height, release velocity, release angle, and the angular and angular velocity vary in the lower extremity at the throwing motion phases. Using the Independent-Samples t Test to understand the different throwing technique during the throwing motion, in addition, the different throwing technique for the all kinematics parameters of the relationship were used the Pearson product-moment correlation coefficient for the test, the significant difference was set α = .05. Results: Between the shot put techniques, there was no significant difference in the throwing distance, step-length, release height, release velocity and release angle, but the vary in the angle and angle velocity of the shank, and the total time was found the significant difference between the different shot put techniques. The total time, vary in the angle of the trunk, and vary in the angle velocity of the shank of the glide technique were significant negative relationship with release velocity, but there were significant positive relationship of vary in the angle velocity of the trunk at the release phase and double support phase with the release height. For the rotational technique, we found the release height was significant positive relationship with vary in the angle thigh at the release phase, with vary in the angle of the thigh at the throwing phase, and vary in the angle of the shank at the release, but the release height was significant negative relationship with the vary in the angle velocity of the thigh, the release velocity was significant negative relationship with vary in the angle of the shank at the throwing phase and vary in the angle of the thigh at the release phase, and vary in the angle velocity of the trunk, thigh, and shank. Discussion: Different throwing techniques, there are differences between the action and the overall performance of the operating time compared to rotary short, but each stage is similar to the action time
Hu, Meng-Tzu, und 胡孟慈. „Kinematic and Electromyographic Analyses of the Thumb during Simulated P-A Glide Manipulation“. Thesis, 2005. http://ndltd.ncl.edu.tw/handle/54315419130210608593.
Der volle Inhalt der Quelle國立成功大學
物理治療研究所
93
Background and Purpose: Pain in joints of the thumb is one of the major occupation- related disorders for orthopaedic physical therapists. Extensive manual tasks involved in their daily activity appear to be the major culprits; among these tasks are the posteroanterior (PA) glide techniques for spinal mobilization/manipulation. Several different PA glide techniques are commonly employed by manual therapists. The performance of these manual techniques is likely to be influenced by factors such as experience and general flexibility as well. However, the differential effects of these PA manipulative techniques on the kinematics and kinetics of the thumb and the EMG activities of related muscles have not yet been studied. The purpose of this study was to investigate the influence of clinical experience, general flexibility and different manipulative techniques on the performance in the thumb. Methods: Fifteen novice subjects (4 males and 11 females, aged 21.9±2.2 yrs) with no clinical experience and fifteen clinical physical therapists (5 males and 10 females, aged 28.0±2.1 yrs) with at least 3 years of orthopaedic experience participated in this study. Each subject performed three different PA glide techniques (PA glide with the thumb unsupported, PA glide with digital support and the PA glide with interphalangeal joint supported by the index) on a force plate while interphalangeal (IP), metacarpophalangeal (MCP) and carpometacarpal (CMC) joints kinematics were tracked by a motion analysis system. The joint angles, maximum thumb-tip force, surface EMG activities of 8 thumb muscles and the Beighton score of each subject were recorded for analyses. Results: There was a negative correlation between the sagittal plane angles (flexion/extension) of the IP and MCP joints except PA glide with IP support in Novice Group (p<0.05). Such relationship was also found between sagittal plane angles of MCP and CMC joints in the Experienced Group (p<0.05). A negative correlation was also found between the Beighton score and the maximum thumb-tip force (p<0.01). The thumb-tip force and EMG activity of the first dorsal interosseous muscle during PA glide with IP support were greater than those of the other two techniques (p<0.05). EMG values in the Experienced Group were smaller than the Novice Group in abductor pollicis brevis (APB), abductor pollicis longus (APL), flexor pollicis brevis (FPB), and flexor pollicis longus (FPL). EMG activities of the extensor pollicis longus (EPL), abductor pollicis longus (APL) and extensor pollicis brevis (EPB) were greater during the unsupported PA glide (p<0.01), comparing with the other two techniques. Conclusions: The results of the present study revealed negative correlation between angles of the IP and MCP, and between those of the MCP and CMC. Subjects with less general flexibility (smaller Beighton score) or when using IP support techniques are capable of exerting greater thumb-tip force. Experienced therapists exhibited less EMG activities and, thus, more efficiency comparing with their novice counterparts in maintaining the stability of the thumb joints. Clinical Relevance: Physical therapists with excessive thumb flexibility are advised to perform the PA glide with IP joint supported to protect the thumb joints from injury.
Chen, Ting-Yi, und 陳庭翊. „The analysis and Interpretation of Reinhold Moritzevich Glière Concerto for Horn and Orchestra opus 91“. Thesis, 2013. http://ndltd.ncl.edu.tw/handle/38614989910102083961.
Der volle Inhalt der Quelle國立臺中教育大學
音樂學系碩士班
101
The French Horn Concerto by Reinhold Moritzevich Glière of the Russia was composed in 1951. Glière wrote this concerto in 1951 and dedicated it to Valeriy Polekh. The date and place of the first performance was fixed--May 10, 1951, in Leningrad. The purpose of research is to discuss Glière《Horn Concerto, Op.91 》’s performance style. In chapter one of this article is about research purposes and methods. In the second chapter, describes the growing up of Glière 's and his life story, and the creation background of the musical composition. In the third chapter is directed against the concerto that he created《Horn Concerto, Op.91》entering analysing of this concerto. In the fourth chapter is directed against present author's play annotation explanatory note of this composition. The fifth chapter is conclusions. This concerto was possession of the status of the importance of french horn. This concerto ordeal performer endurance and player skills (like fast Staccato, long phrase legato, con sord. ……)Three movements have different melody stytle, sometimes very beautiful melody, but sometimes very strong. Thus become one of important track of french horn.
Heidari, Soheila. „Yearning for identity in the glimmer of America: a corpus-assisted analysis of the south asian american diaspora literature“. Doctoral thesis, 2019. http://hdl.handle.net/11573/1239989.
Der volle Inhalt der QuelleTsui, Wen-Yu, und 崔文瑜. „An Analysis and Interpretation of Reinhold Moritsevich Gliere: Concerto for Horn in Bb major, Op.91“. Thesis, 2014. http://ndltd.ncl.edu.tw/handle/09829303485084175441.
Der volle Inhalt der QuelleChung, Guan-Che, und 鍾冠哲. „An Interpretation and Analysis of Reinhold Gliere《Concerto in Bb Major op.91》and Robert Schumann《Adagio and Allegro op.70》“. Thesis, 2013. http://ndltd.ncl.edu.tw/handle/37836497465784645384.
Der volle Inhalt der Quelle中國文化大學
音樂學系碩士班西洋音樂組
101
In this thesis investigate about Reinhold Gliere
Karthigan, G. „Modelling And Analysis Of Fish Inspired Ionic Polymer Metal Composite Flapping Fins“. Thesis, 2012. https://etd.iisc.ac.in/handle/2005/2282.
Der volle Inhalt der QuelleKarthigan, G. „Modelling And Analysis Of Fish Inspired Ionic Polymer Metal Composite Flapping Fins“. Thesis, 2012. http://etd.iisc.ernet.in/handle/2005/2282.
Der volle Inhalt der QuelleΚρέτσης, Αριστοτέλης. „Μελέτη και ανάπτυξη τεχνικών για την αποτελεσματική διαχείριση πόρων σε δίκτυα πλέγματος και υποδομές υπολογιστικών νεφών“. Thesis, 2014. http://hdl.handle.net/10889/8813.
Der volle Inhalt der QuelleDistributed computing technologies, like grids and clouds, shape today a new environment, regarding the way tasks are executed, data are stored and retrieved, and applications are used. Though grids and desktop grids have been the focus of the research community for a long time, a shift has become evident today towards cloud and virtualization related technologies in general, which are supported by large computing factories, namely the data centers. As a result there is also a shift from the model of several powerful resources distributed at various locations in the world (as in grids) towards fewer huge data centers consisting of thousands of “simple” computers that host Virtual Machines. The research performed over the course of my PhD followed this shift, investigating algorithmic issues in the context of grids and then of clouds and developing a number of tools and applications that manage, monitor and utilize these kinds of resources. Initially, we describe the steps followed, the difficulties encountered, and the solutions provided in developing and evaluating a scheduling policy, initially implemented in a simulation environment, in the gLite grid middleware. Our focus is on a scheduling algorithm that allocates in a fair way the available resources among the requested users or jobs. During the actual implementation of this algorithm in gLite, we observed that the validity of the information used by the scheduler for its decisions affects greatly its performance. To improve the accuracy of this information, we developed an internal feedback mechanism that operates along with the scheduling algorithm. Also, a Grid computation resource cannot be shared concurrently between different users or jobs, making it difficult to provide actual fairness. For this reason we investigated the use of virtualization technology in the gLite middleware. We implement and evaluate our scheduling algorithm and the proposed mechanisms in a small gLite testbed. Next, we present a methodology, called communication-aware virtual infrastructures (COMAVI), for the concurrent migration of multiple Virtual Machines (VMs) in computing infrastructures, which aims at the optimum use of the available computational and network resources, by capturing the interdependencies between the communicating VMs. This methodology uses multiple criteria for selecting the VMs that will migrate, with different weights assigned to each of them. COMAVI also selects the computing sites where the migrating VMs will be hosted, by accounting for the way migration affects the logical (or virtual) topologies formed by the communicating VMs and viewing this selection as a logical topology reconfiguration problem. We apply COMAVI to two basic computing infrastructures that exhibit different constraints/criteria and characteristics: a grid infrastructure operating over a wide area network (WAN) and a data center infrastructure operating over a local area network (LAN). Through the presented methodology different communication-aware VM migration algorithms can be tailored to the needs of the resource provider. The algorithms presented resolve the maximum possible number of VM violations (due to computing or communication resource shortages), while tending to minimize the number of migrations performed, the induced network overhead, the logical topology reconfigurations required, and the corresponding service interruptions. We evaluate the proposed methods through simulations in realistic computing environments, and we exhibit their performance benefits. We also consider the use of social network analysis methods on communication traces, collected from Virtual Machines (VMs) located in computing infrastructures, like a data center. Our aim is to identify important VMs, for example VMs that require more bandwidth than other VMs or VMs that communicate often with other VMs. We believe that this approach can handle the large number of VMs present in computing infrastructures and their interactions in the same way social interactions of millions of people are analyzed in today’s social networks. We are interested in identifying measures that can locate these important VMs or groups of interacting VMs, missed through other usual metrics and also capture the time-dynamicity of their interactions. In our work we use real traces and evaluate the applicability of the considered methods and measures. In addition, we consider the analysis and optimization of public clouds. For this reason, we identify important algorithmic operations that should be part of a cloud analysis and optimization tool, including resource profiling, performance spike detection and prediction, resource resizing, and others, and we investigate ways in which the collected monitoring information can be processed towards these purposes. The analyzed information is valuable since it can drive important virtual resource management decisions. We also present an open-source tool we developed, called SuMo, which contains the necessary functionalities for collecting monitoring data from Amazon Web Services (AWS), analyzing them and providing resource optimization suggestions. We also present a Cost and Utilization Optimization (CUO) mechanism for optimizing the cost and the utilization of a set of running Amazon EC2 instances, which is formulated as an Integer Linear Programming (ILP) problem. This CUO mechanism receives information regarding the current set of instances used (their number, type, utilization) and proposes a new set of instances for serving the same load, so as to minimize cost and maximize utilization and performance efficiency. Finally, we present a network planning and operation tool, called Mantis, for designing the next generation optical networks, supporting both flexible and mixed line rate WDM networks. Through Mantis, the user is able to define the network topology, current and forecasted traffic matrices, CAPEX/OPEX parameters, set up basic configuration parameters, and use a library of algorithms to plan, operate, or run what-if scenarios for an optical network of interest. Mantis is designed to be deployed either as a cloud service or as a desktop application. Using the cloud infrastructures features Mantis can scale according to the user demands, executing fast and efficiently the scenarios requested. Mantis supports different cloud platforms either public such as Amazon Elastic Compute Cloud (Amazon EC2) and ~okeanos the GRNET’s cloud service or private based on OpenStack, while its modular architecture allows other cloud infrastructures to be adopted in the future with minimum effort.