Tesis sobre el tema "Bulges on the tube"
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Wu, Zhi-Qian. "Caveolin in membrane nanotubes : curvature sensing and bulge formation". Electronic Thesis or Diss., Université Paris sciences et lettres, 2024. http://www.theses.fr/2024UPSLS007.
Texto completoCaveolin is one of the major protein components of caveolae, which are small cup-shaped invaginations in the plasma membrane. It is synthesized in the endoplasmic reticulum in a signal recognition particle-dependent manner and transported to the Golgi apparatus via COPII-coated vesicles. At the trans-Golgi network (TGN), caveolin 8S complexes further oligomerize into 70S complexes with the facilitation of cholesterol. They are then sorted intotransport carriers through an unknown mechanism and transported to the plasma membrane. The conventional structural model of caveolin might suggest it is a curvature-sensing protein based on its hairpin molecular shape. However, a recently discovered structure model of the caveolin 8S complex in detergent micelles based on cryo-electron microscopy, which exhibits a flat disc geometry, raises questions about its curvature sensitivity.Furthermore, cavins, another major protein component of caveolae that cooperate with caveolins in bending the membrane to form caveolae, do not associate with caveolins at the TGN. Given that no other known candidate, apart from cavins, can cooperate with caveolin to form transport carriers at the TGN, it becomes unclear how these carriers for caveolin are formed there. Therefore, in this project, we aimed to elucidate the curvaturesensitivity and induction of caveolin. We addressed these issues by reconstituting caveolin-1 (Cav1) into the membrane of giant unilamellar vesicles (GUVs) and by performing tube-pulling experiments. The results showed that caveolin is indeed a curvature-sensing protein, with caveolin 8S complexes exhibiting approximately a 5 degree tilt from the horizontal, which endows them with curvature sensitivity. Furthermore, we showed that caveolin 8S complexes can collectively generate membrane curvature at low tension and form scaffolds on the tubes at high tension. In summary, our results showed that caveolin is a curvature-sensing and -inducing protein, suggesting the possibility of its sorting into transport carriers at the TGN based on these properties. Interestingly, we observed that above a certain membrane tension Tt that depends on Cav1 density, nanotubes pulled from Cav1-GUVs no longer exhibit a constant radius and that caveolins form bulges on the tube. To explore how Cav1 form these bulges, we first observed that on average, bulges' size decreases with an increase in membrane tension. We found that the bulge size is proportional to the total amount of caveolin in the bulge, suggesting a constant Cav1 density in the bulges. Additionally, higher density of caveolin in the membrane favors bulge formation and lowers Tt. These results suggest that when the tube radius decreases, caveolin might induce formation of bulges to relax mechanicalconstraints due to the tubular geometry, but a model and high resolution imaging are now needed to explain these observations
Linardon, Camille. "Etirage de tubes de précision pour applications biomédicales : contribution à l'analyse et l'amélioration du procédé par expérimentation, modélisation et simulation numérique". Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00956588.
Texto completoVoirand, Antoine. "Etude théorique de la dynamique d'une bulle dans un tube capillaire chauffé". Thesis, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2016. http://www.theses.fr/2016ESMA0008/document.
Texto completoThe model of a single bubble moving in a capillary tube is written as a contribution to the modeling of Pulsating Heat Pipes. A constant heat load is considered at the wall, and the reference temperature of the problem is defined to be the outside medium temperature, which is closer to reality, and thus allowing the saturation temperature of the vapor phase to vary. Using domain perturbation techniques, a step-by-step resolution ofthe model is implemented, allowing minor physical effects to be taken into consideration,for example the inertial effect on the receding meniscus. A new correlation is proposed on the thickness of the liquid film deposited by the receding meniscus, by means of the capillary number and an evaporation number representing the thermal condition. The velocity and temperature fields in the liquid plug ahead of the meniscus can also be obtained. The resolution of the problem associated with the rear-end of the bubble,where the rear meniscus advances on either a micrometric liquid film or an adsorbed film left by the dry-out of the capillary wall, shows a corrugating liquid-vapor interface.The magnitude of these corrugations is strongly dependent on the value of the heat load applied at the wall. In the case of wall rewetting, the interface corrugations at the triple line are due to its displacement, and not to the thermal boundary condition. Because the evaporative mass flux through the liquid-vapor interface modifies the vapor bubble mass, a complete transient thermodynamical model of the bubble is implemented. In this case, the important parameters controlling the kinematics, dynamics and thermodynamics of the bubble were identified
Hervieu, Eric. "Ecoulement monophasique et diphasique à bulles dans un branchement en Té : étude théorique et expérimentale". Grenoble INPG, 1988. http://www.theses.fr/1988INPG0031.
Texto completoTouhami, Kamel. "Contribution a l'etude des ecoulements diphasiques dans un tube en u : hydrodynamique et transfert de matiere". Toulouse, INSA, 1987. http://www.theses.fr/1987ISAT0029.
Texto completoHutchinson, Mark Ian. "Bulge forming of tubular components". Thesis, Sheffield Hallam University, 1988. http://shura.shu.ac.uk/19849/.
Texto completoHéraud, Pierre. "Etude de la dynamique des bulles infinies : application à l'étude de la vidange et du remplissage de réservoir". Phd thesis, Université de Provence - Aix-Marseille I, 2002. http://tel.archives-ouvertes.fr/tel-00011664.
Texto completoProctor, Robert Neil. "Metallicities and stellar populations in spiral bulges". Thesis, University of Central Lancashire, 2002. http://clok.uclan.ac.uk/20825/.
Texto completoFalcon, Barroso Jesus. "Kinematics & stellar populations of nearby bulges". Thesis, University of Nottingham, 2003. http://eprints.nottingham.ac.uk/10016/.
Texto completoBallero, Silvia Kuna. "Evolution of chemical abundances in active and quiescent spiral bulges". Doctoral thesis, Università degli studi di Trieste, 2008. http://hdl.handle.net/10077/2560.
Texto completoIn this thesis I develop a chemical evolution model which takes advantage of the most recent high-quality abundance observations in the Galactic bulge to put constraints on its formation and evolution and to obtain a baseline model for bulges in general. I adopt updated massive star nucleosynthesis and follow the evolution of several alpha-elements and Fe by varying the evolutionary parameters. The [alpha/Fe] ratios in the bulge are correctly predicted to be supersolar for a wide range in [Fe/H], and the stellar metallicity distribution is reproduced assuming a short formation timescale, a high star formation efficiency and an initial mass function flatter than the disk. Metallicity-dependent oxygen yields with stellar mass loss are included in the chemical evolution models for the bulge and the solar neighbourhood. The agreement between predicted and observed [O/Mg] trends above solar metallicity is significantly improved; a normalisation problem probably indicates that the adopted semi-empirical yields need adjustment. The difference between [O/Fe] and the other [alpha/Fe] ratios in the bulge and solar neighbourhood is explained. I test the so-called universal initial mass function, suitable for ellipticals and disks, to see if the bulge stellar metallicity distribution can be reproduced by varying the yields for very massive stars, and included M31 in my analysis. I show that assuming a flatter initial mass function than the universal one is necessary, and that a variation exists in the initial mass function among different environments. Finally, I investigate the evolution of spiral bulges hosting Seyfert nuclei, with detailed calculations of the galactic potential and of the feedback from the central supermassive black hole in an Eddington-limited accretion regime. New spectro-photometrical evolution codes covering a wide range of stellar ages and metallicities allowed to model the photometric features of local bulges. I successfully predict the observed black hole-host bulge mass relation. The observed present-day nuclear bolometric luminosity is achieved only for the most massive bulges, otherwise a rejuvenation is necessary. The observed high star formation rates and metallicities, constancy of chemical abundances with the redshift and bulge present-day colours are reproduced, but a steeper initial mass function is required to match the colour-magnitude relation and the present K-band bulge luminosity.
In questa tesi, ho sviluppato un modello di evoluzione chimica che si avvale di recenti osservazioni ad alta qualità di abbondanze chimiche nel bulbo della Via Lattea, per porre dei vincoli sui suoi meccanismi di formazione ed evoluzione e ottenere un modello generale per i bulbi di spirale. Ho adottato una nucleosintesi aggiornata per le stelle massicce e seguito l'evoluzione di diversi elementi-alpha e del ferro, variando i parametri evolutivi. Si prevede correttamente che i rapporti [alpha/Fe] nel bulbo siano soprasolari per un ampio intervallo in [Fe/H]. La distribuzione in metallicità è riprodotta con un tempo di formazione breve, un'alta efficienza di formazione stellare e una funzione iniziale di massa più piatta che nel disco. Yields di ossigeno con perdita di massa stellare in funzione della metallicità sono stati inclusi nei modelli di evoluzione chimica del bulbo e dei dintorni solari. L'accordo tra gli andamenti di [O/Mg] previsti e osservati per metallicità soprasolari risulta sensibilmente migliorato; si spiega inoltre la differenza tra il rapporto [O/Fe] e gli altri [alpha/Fe] nel bulbo e nei dintorni solari. Un problema di normalizzazione indica che probabilmente gli yields semi-empirici adottati necessitano una revisione. Ho verificato se con la cosiddetta funzione iniziale di massa universale, adeguata per galassie ellittiche e dischi, la distribuzione in metallicità stellare del bulge può essere riprodotta calibrando gli yields delle stelle supermassicce, includendo M31 nell'analisi. Si dimostra che una funzione iniziale di massa più piatta di quella universale è necessaria, e che esiste una variazione nella funzione iniziale di massa tra i diversi ambienti. Infine, ho studiato l'evoluzione di bulbi di spirali che ospitano galassie di Seyfert, mediante calcoli dettagliati del potenziale galattico e del feedback dal buco nero supermassiccio centrale in un regime di accrescimento limitato dal tasso di Eddington. Nuovi codici spettro-fotometrici che coprono un ampio intervallo di età stellari e di metallicità hanno permesso di modellizzare le caratteristiche fotometriche dei bulbi locali. La relazione osservata tra massa del buco nero e del bulbo ospite è prevista con successo. La luminosità bolometrica nucleare misurata al tempo presente si consegue solo per i bulbi più massicci, negli altri casi è necessario un "ringiovanimento". Le osservazioni di alto tasso di formazione stellare, alte metallicità, invarianza di abbondanze chimiche col redshift e colori dei bulbi locali sono riprodotte; una funzione iniziale di massa più ripida è invece richiesta per la relazione colore-magnitudo e la luminosità dei bulbi in banda K al tempo presente.
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Wilhelm, Sylvia. "Étude des pertes de charge dans un aspirateur de turbine bulbe par simulations numériques instationnaires". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI020/document.
Texto completoThe draft tube of a hydraulic turbine is the turbine element located downstream of the runner. It has a divergent shape in order to convert the residual kinetic energy leaving the runner into pressure and thus increase the effective head of the turbine. The performances of low head bulb turbines are highly influenced by the head losses in the draft tube. The prediction of these head losses in a design process is thereby a major issue. The numerical prediction of the head losses in the draft tube is a real challenge because the flow in the draft tube is dynamically complex with high Reynolds numbers, a swirl and an adverse pressure gradient. These characteristics render conventional industrial approaches not appropriate. The objective of this work is twofold: (i) to improve the numerical prediction of the turbulent flow in the draft tube by using URANS and LES unsteady approaches and paying special attention to the description of the inlet boundary conditions of the draft tube and (ii) to conduct a detailed analysis of the energy transfers in the draft tube in order to better understand the origin of the head losses. An unsteady inlet boundary condition for the simulations reproducing the flow field at the runner outlet is developed. Numerical results are compared to experimental measurements in order to evaluate the predictive capacity of each turbulence modelling approach (URANS and LES). This validation step highlights the importance of defining properly the three velocity components at the draft tube inlet. The influence on the numerical results of boundary conditions of the calculation domain, such as wall roughness and the outlet boundary condition, is evaluated, in particular in case of LES. Thanks to a detailed analysis of the mean kinetic energy balance in the draft tube, the hydrodynamic phenomena responsible for head losses are identified. The head losses prediction differences between URANS and LES are thus analyzed in detail and possible improvements for the head losses prediction are identified. Finally, this analysis enables to understand the head losses evolution observed between several operating points of the turbine
Nowak, Nina. "Exploring the relations between bulges and central black holes in unusual galaxies". Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-108031.
Texto completoMargalef, Bentabol Berta. "Formation and evolution of discs and bulges through cosmic time in CANDELS". Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/44887/.
Texto completoDeng, Junpeng. "X-ray crystallographic studies on RNA Tetraplexes and duplexes containing double bulges /". The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486399160105564.
Texto completoCostantin, L. "On the formation of bulges from their observed properties in nearby galaxies". Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3422316.
Texto completoNell’Universo locale, più del 60% della materia stellare si trova in galassie ellittiche e nei rigonfiamenti centrali, denominati sferoidi, di galassie lenticolari e a spirale. Tuttavia, ancora non si conosce a cosa sia dovuta l’eterogeneità delle loro proprietà osservate. In questo lavoro ci proponiamo di interpretare nel modo più accurato possibile come diversi meccanismi di formazione ed evoluzione possano produrre questa varietà di proprietà. Infatti, determinare gli scenari di formazione ed evoluzione di queste strutture permette una conoscenza più profonda delle galassie stesse. Presento le tecniche di analisi utilizzate per caratterizzare le proprietà strutturali degli sferoidi sia fotometricamente sia geometricamente. Infatti, descrivo gli algoritmi che permettono di analizzare la distribuzione di brillanza superficiale delle galassie e la forma intrinseca tridimensionale dei loro sferoidi. Discuto l’analisi fotometrica delle varie componenti di un campione di 404 galassie nell’ambito della survey Calar Alto Legacy Field Area (CALIFA). Le galassie vengono descritte con una combinazione di modelli, comprendenti sorgenti nucleari, sferoidi, dischi e barre. Ho riscontrato che le galassie più massicce sono meglio modellate con solamente uno sferoide o con sferoide+disco ma con un rapporto di luminosità B/T > 0.2. A masse intermedie, prevalgono le galassie con miglior modello dato da sferoide+disco e B/T < 0.2, mentre nelle galassie meno massicce la componente di sferoide tende a diventare sempre meno importante. Quest’analisi pone le basi per una serie di nuovi studi all’interno della collaborazione di CALIFA. In seguito, caratterizzo gli sferoidi di un campione di nove galassie di tipo morfologico avanzato. Questi sferoidi hanno la peculiarità di essere molto piccoli e presentare una bassa dispersione di velocità. Essi sono stati analizzati da un punto di vista sia fotometrico sia cinematico, usando spettroscopia a fenditura lunga ad alta risoluzione spettrale ottenuta con il Telescopio Nazionale Galileo. Queste proprietà sono state utilizzate per studiare il comportamento del campione di sferoidi nelle relazioni di scala (piano fondamentale, Kormendy, Faber-Jackson). L’analisi evidenzia come un’unica popolazione di sferoidi segua le stesse relazioni di scala, con una transizione nelle proprietà fotometriche e cinematiche osservate dovuta alla loro massa. Successivamente, sempre nell’ambito della survey CALIFA, analizzo la forma intrinseca tridimensionale degli sferoidi in 83 galassie. Utilizzo simulazioni numeriche (Galmer) per testare l’affidabilità del metodo statistico utilizzato per svolgere l’analisi geometrica. Introduco il diagramma (B/A, C/A), che permette di caratterizzare la forma degli sferoidi del nostro campione. Essi sono principalmente oblati (66%), con una piccola frazione di prolati (19%) e triassiali (15%). La maggior parte degli sferoidi triassiali si trova nelle galassie barrate (75%). Attraverso l’analisi della forma intrinseca e delle proprietà osservate degli sferoidi si conclude che il fenomeno di interazione tra galassie è uno dei maggiori responsabili della formazione degli sferoidi oblati più massicci, mentre l’evoluzione della barra tende a formare gli sferoidi triassiali meno massicci. Infine, propongo un’analisi dei criteri solitamente utilizzati in letteratura per discriminare diverse tipologie di sferoidi. A questo proposito vengono analizzati gli sferoidi in nove galassie nell’ambito del progetto ATLAS3D. L’analisi si basa su proprietà sia fotometriche sia spettroscopiche e sulla loro forma intrinseca, I risultati evidenziano come l’indice di Sérsic non sia un buon indicatore per differenziare diversi sferoidi. Invece, la forma intrinseca e lo stato dinamico dello sferoide vengono proposti come miglior combinazioni di parametri per caratterizzare gli sferoidi galattici.
Turner, Kimberly Noel. "EDUCATION BULGES AND MASS PROTEST: HOW HIGHER EDUCATION INFLUENCES PROTEST ONSET AND OUTCOMES". OpenSIUC, 2021. https://opensiuc.lib.siu.edu/dissertations/1951.
Texto completoXiong, Yong. "X-Ray crystallographic studies on DNA, RNA hybrids and duplexes containing single bulges /". The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488194825668504.
Texto completoTsang, Tat-Kin. "Tube feed or not tube feed is tube feeding a medical treatment? /". Online full text .pdf document, available to Fuller patrons only, 2001. http://www.tren.com.
Texto completoSatyapal, S., N. J. Secrest, B. Rothberg, J. A. O’Connor, S. L. Ellison, R. C. Hickox, A. Constantin, M. Gliozzi y and J. L. Rosenberg. "OBSCURED AGNs IN BULGELESS HOSTS DISCOVERED BY WISE : THE CASE STUDY OF SDSS J1224+5555". IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621387.
Texto completoPastrav, Bogdan Adrian. "The effects of dust on the derived photometric parameters of disks and bulges in spiral galaxies". Thesis, University of Central Lancashire, 2013. http://clok.uclan.ac.uk/9604/.
Texto completoJuknevičienė, Živilė. "Šviesos ir temperatūros įtaka bulvės (Solanum tuberosum L.) stiebagumbių dygimui, augalų vystymuisi bei produktyvumo formavimuisi". Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121012_113041-86646.
Texto completoResearch problem. Plant productivity enhancement and yield quality improvement are one of the top priorities for agricultural sciences. The potato (Solanum tuberosum L.) is a staple crop, whose cultivation and distribution geography is larger than that of maize, rice and wheat. The main potato produce is tubers which are used not only for food and feed but also for alternative purposes – production of bioplastics, starch and spirits (Šlapakauskas, Duchovskis, 2008). Potato crop performance is highly reliant on the quality of tubers used as seed material. In terms of physiology, the potato is a complex plant whose growth, development and tuber storage conditions influence sprouting (Cristiansen et al., 2006). Potato tuber sprouting is one of the prime factors determining the number of stems per potato plant, which is also a factor, which influences potato yield (Allen et al., 1992). Seeking to advance potato maturity and harvesting and to achieve a dense, productive stand, exogenous growth regulators can be used for tuber sprouting. These growth regulators are synthetic analogues of phytohormones that enable changes in plant hormonal status and modification of metabolic processes. J. Lazauskas (2001) suggests that to achieve short and strong sprouts, it is most efficient to sprout potato tubers under natural light conditions at a temperature no higher than 17 oC, 35–45 days prior to planting. However, a shortage of light during tuber sprouting or inadequate temperature result... [to full text]
Batiste, Merida, Misty C. Bentz, Sandra I. Raimundo, Marianne Vestergaard y Christopher A. Onken. "Recalibration of the MBH–σ⋆ Relation for AGN". IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/623860.
Texto completoMirshekari, Gholamreza. "Microscale shock tube". Thèse, Université de Sherbrooke, 2008. http://savoirs.usherbrooke.ca/handle/11143/1897.
Texto completoMuçouçah, Mariana Fraga Soares [UNESP]. "Crescimento de bulbos de calla cultivados em substrato em função do nível freático". Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/103450.
Texto completoUniversidade Estadual Paulista (UNESP)
Foi estudada a influência de cinco profundidades de lençol freático no desenvolvimento de bulbos de calla (Zantedeschia sp). As características avaliadas foram: área foliar, número de folhas, número de flores, altura da haste floral, ciclo da cultura, ganho de massa verde do bulbo, evapotranspiração da cultura e eficiência do uso da água. As callas foram cultivadas em estufa de vidro com 50% de redução na radiação interna, plantadas em vasos construídos de tubos de pvc de diâmetro nominal de 150 mm preenchidos com substrato, os bulbos utilizados apresentavam massa verde inicial variando de 10 a 12 g. Os vasos foram colocados em bandejas, com capacidade para seis vasos, as mesmas apresentavam um sistema automático para o abastecimento de água por um reservatório conectado diretamente às bandejas com uma bóia para manutenção do nível do lençol freático constante. As profundidades dos lençóis freáticos foram: 10, 17, 24, 31 e 38 cm. As características referentes ao desenvolvimento da planta foram verificadas ao longo do ciclo, por meio de nove avaliações efetuadas durante o cultivo. A evapotranspiração foi medida diariamente e computada semanalmente e ao término do ciclo. O ganho de massa verde dos bulbos foi avaliado ao final do ciclo de cultivo pela relação entre a massa verde inicial e a massa verde final. A eficiência do uso da água foi checada com base na evapotranspiração da cultura (L.planta-1) e na massa verde final do bulbo (g). Os resultados referentes à área foliar foram variáveis de 1.011,6 a 2.016,3 cm2. O número de folhas emitidas variou de 7,5 a 13,8 folhas por bulbo. Ao longo de todo o ciclo de cultivo o número médio de flores emitidas foi de 0,8 a 1,2 flores por bulbo. Os bulbos apresentaram um aumento variável de 21,7 a 11,7 vezes em relação ao tamanho inicial, ou seja, o ganho de massa verde ao final do cultivo foi na ordem de 2.173 a 1.170%.
The objective was to determine the influence of 5 different table water levels in the crop development of Calla. The parameter evaluated were leaf area, number of leaves, number of flowers, flowers height, growth cycle, tuber increment rate, evapotranspiration of the culture and efficiency in water use. The study was conducted in glass greenhouse with 50% percent of sunlight reduction. The plants were grown in PVC pots with diameter of 150 mm, which were filled with substrate. The plant tubers weigthed from 10 g to 12 g. The pots were placed within containers, at a rate of six per container, where the water replacement was authomatically determined by a buoy, which kept the water level constant. The table water levels used were 10, 17, 24, 31 and 38 cm. The crop development parameters were checked in nine evaluations during the growth cycle. Evapotranspiration was evaluated weekly and at the end of the cycle. The increment in tuber weigth was determined from the initial and final fresh weight. The water use efficiency was determined from the culture evapotranspiration (mm) and from the final fresh weigth (g). The results show that leaf area varied between 1,011.6 and 2,016.3 cm2. The number of leaves varied from 7.5 and 13.8 leaves per tuber. The number of flowers produced per tuber throughout their whole life cycle was 0.8 and 1.2. The plant tubers presented a size increment which ranged from 21.7 times to 11.7 times their initial size, which represented an increment of fresh weigth at the end of the culture of 2,173% and 1,170%. The evapotranspiration of the whole culture was 46.14 L/planta and 26.89 L/planta. The efficiency in water use varied between 4.5 g/L and 6.9 g/L. The data set was submitted to the F and Tukey statistical tests, to allow for comparisons of average results. Was found statistical discrepancy in the growth cycle parameter, between 38 cm table water level, which life cycle was 281 days, and 10 and 24 cm table water levels.
Abdelaziz, Fadila. "Contribution à l'étude de la convection dans les faisceaux tubulaires : effets de l'orientation des tubes et de la génération de bulles en paroi". Vandoeuvre-les-Nancy, INPL, 1989. http://www.theses.fr/1989NAN10459.
Texto completoCha, Jeesung Jeff. "CFD Simulation of Multi-Dimensional Effects in Inertance Tube Pulse Tube Cryocoolers". Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5229.
Texto completoMuçouçah, Mariana Fraga Soares 1968. "Crescimento de bulbos de calla cultivados em substrato em função do nível freático /". Botucatu : [s.n.], 2005. http://hdl.handle.net/11449/103450.
Texto completoBanca: João Carlos Cury Saad
Banca: Magali Ribeiro da Silva
Banca: Rubens Duarte Coelho
Banca: Tais Tostes Graziano
Resumo: Foi estudada a influência de cinco profundidades de lençol freático no desenvolvimento de bulbos de calla (Zantedeschia sp). As características avaliadas foram: área foliar, número de folhas, número de flores, altura da haste floral, ciclo da cultura, ganho de massa verde do bulbo, evapotranspiração da cultura e eficiência do uso da água. As callas foram cultivadas em estufa de vidro com 50% de redução na radiação interna, plantadas em vasos construídos de tubos de pvc de diâmetro nominal de 150 mm preenchidos com substrato, os bulbos utilizados apresentavam massa verde inicial variando de 10 a 12 g. Os vasos foram colocados em bandejas, com capacidade para seis vasos, as mesmas apresentavam um sistema automático para o abastecimento de água por um reservatório conectado diretamente às bandejas com uma bóia para manutenção do nível do lençol freático constante. As profundidades dos lençóis freáticos foram: 10, 17, 24, 31 e 38 cm. As características referentes ao desenvolvimento da planta foram verificadas ao longo do ciclo, por meio de nove avaliações efetuadas durante o cultivo. A evapotranspiração foi medida diariamente e computada semanalmente e ao término do ciclo. O ganho de massa verde dos bulbos foi avaliado ao final do ciclo de cultivo pela relação entre a massa verde inicial e a massa verde final. A eficiência do uso da água foi checada com base na evapotranspiração da cultura (L.planta-1) e na massa verde final do bulbo (g). Os resultados referentes à área foliar foram variáveis de 1.011,6 a 2.016,3 cm2. O número de folhas emitidas variou de 7,5 a 13,8 folhas por bulbo. Ao longo de todo o ciclo de cultivo o número médio de flores emitidas foi de 0,8 a 1,2 flores por bulbo. Os bulbos apresentaram um aumento variável de 21,7 a 11,7 vezes em relação ao tamanho inicial, ou seja, o ganho de massa verde ao final do cultivo foi na ordem de 2.173 a 1.170%.
Abstract: The objective was to determine the influence of 5 different table water levels in the crop development of Calla. The parameter evaluated were leaf area, number of leaves, number of flowers, flowers height, growth cycle, tuber increment rate, evapotranspiration of the culture and efficiency in water use. The study was conducted in glass greenhouse with 50% percent of sunlight reduction. The plants were grown in PVC pots with diameter of 150 mm, which were filled with substrate. The plant tubers weigthed from 10 g to 12 g. The pots were placed within containers, at a rate of six per container, where the water replacement was authomatically determined by a buoy, which kept the water level constant. The table water levels used were 10, 17, 24, 31 and 38 cm. The crop development parameters were checked in nine evaluations during the growth cycle. Evapotranspiration was evaluated weekly and at the end of the cycle. The increment in tuber weigth was determined from the initial and final fresh weight. The water use efficiency was determined from the culture evapotranspiration (mm) and from the final fresh weigth (g). The results show that leaf area varied between 1,011.6 and 2,016.3 cm2. The number of leaves varied from 7.5 and 13.8 leaves per tuber. The number of flowers produced per tuber throughout their whole life cycle was 0.8 and 1.2. The plant tubers presented a size increment which ranged from 21.7 times to 11.7 times their initial size, which represented an increment of fresh weigth at the end of the culture of 2,173% and 1,170%. The evapotranspiration of the whole culture was 46.14 L/planta and 26.89 L/planta. The efficiency in water use varied between 4.5 g/L and 6.9 g/L. The data set was submitted to the F and Tukey statistical tests, to allow for comparisons of average results. Was found statistical discrepancy in the growth cycle parameter, between 38 cm table water level, which life cycle was 281 days, and 10 and 24 cm table water levels.
Doutor
Conrad, Theodore Judson. "Miniaturized pulse tube refrigerators". Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41108.
Texto completoTuzun, Aydin. "Analysis Of Tube Upsetting". Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605660/index.pdf.
Texto completoexternal, internal, simultaneous internal and external upsetting, and expanding of tube. In general, tubular parts require more than one upsetting stage. In industry, generally trial-error methods, which require lots of time and effort depending on experience, are used for the design of stages. Wrong design causes failures during production. On the other hand, the problems, which are likely to be encountered in manufacturing, can be observed and solved in the design stage by using finite element analysis. In this study, the finite element analyses of external, internal, simultaneous internal and external tube upsetting, and tube expanding processes have been realized. During the analyses, the part and the die geometries at the intermediate stages, which have been designed according to the proposed procedures, have been used. The stress and strain distributions and die filling actions have been observed during the process. The process design and die geometries have been evaluated according to the finite element results. It has been seen that the recommended procedures generally generate acceptable designs. In some cases, it has been noted that minor modifications may be required on the design.
Boruchowicz, Arnaud. "Sarcoidose et tube digestif". Lille 2, 1993. http://www.theses.fr/1993LIL2M136.
Texto completoRougelin-Clapasson, Christine. "Vascularites et tube digestif". Montpellier 1, 1990. http://www.theses.fr/1990MON11291.
Texto completoAvila, Filipe dos Santos. "Shakespeare in the tube". reponame:Repositório Institucional da UFSC, 2014. https://repositorio.ufsc.br/xmlui/handle/123456789/123196.
Texto completoMade available in DSpace on 2014-08-06T17:55:35Z (GMT). No. of bitstreams: 1 326624.pdf: 7144935 bytes, checksum: 0db746712acd50377c70e2136c9a07f6 (MD5) Previous issue date: 2014
Abstract : The problem addressed in the present study concerns William Shakespeare's plays in performance on television, most specifically the presence of violence in BBC's production of Titus Andronicus, directed by Jane Howell. I have come up with two sets of hypotheses. The first is that the violence identifiable in the playtext seems to have been recreated by Howell through the specificities of the medium, making such violence neither excessively gory nor comic. The second is that Jane Howell's utilization of alienating devices in Shakespeare's first tetralogy, as pointed out by Graham Holderness, can also be verified in Titus Andronicus. Such elements may be related to the aforementioned treatment of violence in the play and may serve as a way of making political or aesthetic commentaries on the play itself. Thus, in order to approach my corpus I relied on television and performance studies and Bertolt Brecht?s and some of his commentators' writings on epic theater. I have also brought to my work the voices of critics about the violence in the play itself, most importantly Francis Barker's notions on the "occlusion of violence" in Titus Andronicus. The present thesis concludes that Brechtian elements are indeed present in Howell's production and that, to a certain extent, they are related to the violence in Titus Andronicus. However, this relationship is complex. At the same time that the extravagant violence is hidden from the spectator and alienation devices every now and then distance the audience from the characters and the action, Young Lucius' reaction to this same, often-unseen violence is highlighted.
Simion, Stefania. "Empirical essays on youths' labour markets and education". Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/24742.
Texto completoZhang, Hong Dong. "Shear lag in tube-in-tube structures coupled with outrigger and belt trusses". Thesis, University of Macau, 2003. http://umaclib3.umac.mo/record=b1636335.
Texto completoArora, Yogesh. "Inspecting finned ferromagnetic heat exchanger tubes using tube to tube through transmission technique". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq20603.pdf.
Texto completoBrugière, Olivier. "Fiabilité et évaluation des incertitudes pour la simulation numérique de la turbulence : application aux machines hydrauliques". Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GRENI002/document.
Texto completoThe reliable numerical simulation of hydraulic turbines performance requires : i) to includeinto the conventional RANS computations the effect of the uncertainties existing in practiceon the inflow conditions; ii) to rely on a LES (Large Eddy Simulation) strategy to improve thedescription of turbulence effects when discrepancies between RANS computations and experimentskeep arising even though uncertainties are taken into account. The present workapplies a non-intrusive Uncertainty Quantification strategy (NISP for Non-Intrusive SpectralProjection) to two configurations of practical interest : a Francis turbine distributor, with uncertaininlet flow rate and angle, and a draft-tube of a bulb-type turbine with uncertain inflowconditions (velocity distributions, in particular close to the wall boundaries, and turbulentquantities). The NISP method is not only used to compute the mean value and variance ofquantities of interest, it is also applied to perform an analysis of the variance and identify inthis way the most influential uncertainties. The RANS simulations, verified through a gridconvergence approach, are such the discrepancies between computation and experimentcannot be explained by taking into account the inflow uncertainties for most of the configurationsunder study. Therefore, LES simulations are also performed and these simulations areverified using an original methodology for assessing the quality of the computational grids(since the grid-convergence concept is not relevant for LES). For most of the flows understudy, combining a SGE strategy with a UQ approach yields reliable numerical results. Takinginto account inflow uncertainties also allows to propose a robust optimization strategy forthe Francis turbine distributor under study
Falah, Nabil. "The interaction of steel tube and concrete core in concrete filled steel tube columns". Aachen Shaker, 2010. http://d-nb.info/1003886949/04.
Texto completoNaito, J., M. Shikida, M. Hirota, Z. Y. Tan, K. Sato y 一雄 佐藤. "Miniaturization of on-wall in-tube flexible thermal flow sensor using heat shrinkable tube". IEEE, 2008. http://hdl.handle.net/2237/11139.
Texto completoZhu, Jingxu (Jesse). "Tube erosion in fluidized beds". Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/29225.
Texto completoApplied Science, Faculty of
Chemical and Biological Engineering, Department of
Graduate
Schulze, Anja. "Phylogeny of vestimentiferan tube worms". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0009/NQ52771.pdf.
Texto completoMcNeil, D. A. "Flooding in a vertical tube". Thesis, University of Strathclyde, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381710.
Texto completoJarrar, Ribhi Farid. "Investigation of Eustachian tube function". Thesis, University of Southampton, 1989. https://eprints.soton.ac.uk/52244/.
Texto completoSavoye-Collet, Céline. "Imagerie fonctionnelle du tube digestif". Rouen, 2006. http://www.theses.fr/2006ROUE04NR.
Texto completoAlevizos, Konstantinos. "Tube extrusion of hexagonal metals". Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6049.
Texto completoFLUCK, SANDRINE. "Monoxyde d'azote et tube digestive". Strasbourg 1, 1994. http://www.theses.fr/1994STR15051.
Texto completoSundbom, Cristine. "THE TUBE : Formgiving discourse - not form follows norm. The medical ventilator and the neglected tube". Thesis, Konstfack, Industridesign, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-3192.
Texto completoLake, Lannie R. "The influence of a lower heated tube on nucleate pool boiling from a horizontal tube". Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23702.
Texto completoGorgy, Evraam. "Experimental evaluation of heat transfer impacts of tube pitch on highly enhanced surface tube bundle". Diss., Kansas State University, 2011. http://hdl.handle.net/2097/11995.
Texto completoDepartment of Mechanical and Nuclear Engineering
Steven J. Eckels
The current research presents the experimental investigation of the effect of tube pitch on enhanced tube bundles’ performance. The typical application of this research is flooded refrigerant evaporators. Boosting evaporator’s performance through optimizing tube spacing reduces cost and energy consumption. R-134a with the enhanced tube Turbo BII-HP and R-123 with Turbo BII-LP were used in this study. Three tube pitches were tested P/D 1.167, P/D 1.33, and P/D 1.5. Each tube bundle includes 20 tubes (19.05 mm outer diameter and 1 m long each) constructed in four passes. The test facility’s design allows controlling three variables, heat flux, mass flux, and inlet quality. The type of analysis used is local to one location in the bundle. This was accomplished by measuring the water temperature drop in the four passes. The water-side pressure drop is included in the data analysis. A new method called the EBHT (Enthalpy Based Heat Transfer) was introduced, which uses the water-side pressure drop in performing the heat transfer analysis. The input variables ranges are: 15-55 kg/m².s for mass flux, 5-60 kW/m² for heat flux, and 10-70% for inlet quality. The effect of local heat flux, local quality, and mass flux on the local heat transfer coefficient was investigated. The comparison between the bundle performance and single tube performance was included in the results of each tube bundle. The smallest tube pitch has the lowest performance in both refrigerants, with a significantly lower performance in the case of R-134a. However, the two bigger tube pitches have very similar performance at low heat flux. Moreover, the largest tube pitch performance approaches that of the single tube at medium and high heat fluxes. For the R-123 study, the smallest tube bundle experienced quick decease in performance at high qualities, exhibiting tube enhancement dry-out at certain flow rates and high qualities. The flow pattern effect was demonstrated by the dry-out phenomena. At medium and high heat fluxes, as the tube pitch increases, the performance approaches that of the single tube. All tube bundles experience quick decrease in performance at high qualities. Evidently, P/D 1.33 is the optimum tube pitch for the studied refrigerants and enhanced tubes combinations.
Georgieva, Magdalena Nikolaeva. "Tube-building annelids from hydrothermal vents and cold seeps : tube morphology, fossilisation, and evolutionary history". Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/15492/.
Texto completoZdráhala, Radim. "Analýza vyboulování trubek kapalinou". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318536.
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