Bibliografie tematiche / 60J60

Letteratura scientifica selezionata sul tema "60J60"

Autore: Grafiati

Pubblicato: 1 giugno 2024

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Articoli di riviste sul tema "60J60":

Abdel-Rehim, E. A. "The Extension of the Physical and Stochastic Problems to Space-Time-Fractional Differential Equations". Journal of Physics: Conference Series 2090, n. 1 (1 novembre 2021): 012031. http://dx.doi.org/10.1088/1742-6596/2090/1/012031.

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Abstract The fractional calculus gains wide applications nowadays in all fields. The implementation of the fractional differential operators on the partial differential equations make it more reality. The space-time-fractional differential equations mathematically model physical, biological, medical, etc., and their solutions explain the real life problems more than the classical partial differential equations. Some new published papers on this field made many treatments and approximations to the fractional differential operators making them loose their physical and mathematical meanings. In this paper, I answer the question: why do we need the fractional operators?. I give brief notes on some important fractional differential operators and their Grünwald-Letnikov schemes. I implement the Caputo time fractional operator and the Riesz-Feller operator on some physical and stochastic problems. I give some numerical results to some physical models to show the efficiency of the Grünwald-Letnikov scheme and its shifted formulae. MSC 2010: Primary 26A33, Secondary 45K05, 60J60, 44A10, 42A38, 60G50, 65N06, 47G30,80-99

Karavidas, Kostas. "Ta Ellinika Periodika tou 19ou Aiona (‘The Greek Periodicals of the Nineteenth Century’), Martha Karpozilou (2021)". Journal of Greek Media & Culture 9, n. 2 (1 novembre 2023): 249–53. http://dx.doi.org/10.1386/jgmc_00084_5.

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Review of: Ta Ellinika Periodika tou 19Ou Aiona (‘The Greek Periodicals of the Nineteenth Century’), Martha Karpozilou (2021) Athens: Vivliothiki tis Voulis ton Ellinon, 220 pp. (vol. 1), 407 pp. (vol. 2), ISBN 978-9-60560-207-9, p/bk ISBN 978-9-60560-208-6, p/bk (free distribution)

Jankauskienė, Zofija, e Elvyra Gruzdevienė. "INVESTIGATION OF STINGING NETTLE (URTICA DIOICA L.) IN LITHUANIA". Latgale National Economy Research 1, n. 2 (30 giugno 2010): 176. http://dx.doi.org/10.17770/lner2010vol1.2.1782.

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Fiber nettle is a cultivated form of the wild nettle and could become a renewable recourse of natural fibres in Lithuania. The aim of research was to investigate propagation ability (shoot rooting) of stinging nettle, investigate influence of different crop density on plant biometrical indices, productivity. The investigation was carried out at the Upytė Research Station of LIA in 2008-2009. The shoots of stinging nettle were cut into segments, the top part of the stem and the segments of the stem were separated and planted in the filed separately. The crop of different density was established: 60x60 and 60x100 cm. The results of our investigation showed, that stinging nettle may be propagated in vegetative way, rooted under field conditions. The top parts of the stem shoved slightly better rooting results than the segments of the stem. Plants from the crop of 2nd year, 60x60, were grosser, more productive than that of the 1st year crop. Plants of the 1st year crop, 60x100, had more stems per plant than that of 1st year crop, 60x60, but amount of stems (units ha-1) was higher in the crop of 1st year crop, 60x60.

Jankauskienė, Zofija, e Elvyra Gruzdevienė. "Investigations of Changes of Stinging Nettle’s (Urtica dioica L.) Crop Density". Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (6 agosto 2015): 116. http://dx.doi.org/10.17770/etr2013vol1.807.

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Recently all countries are looking for the renewable resources. Stinging nettle (Urtica dioica L.) is a perennial plant owning many valuable properties, including yielding natural fibres. Fiber nettle is a cultivated form of the wild nettle. The aim of the research was to investigate changes of productivity of stinging nettle’s crop established at different crop densities. Main criterion discussed in the article is the number of the stems per measuring unit (i.e., crop density). The investigation was carried out at the Upytė Research Station of LRCAF in 2008-2012. The crop of different implantation density was established: 60x60 and 60x100 cm. The results of our investigation show that in the first cropping year stinging nettle produced 25-43 stems per plant. Plants from the crop of 2nd year, 60x60, were grosser, more productive than that of the 1st year crop. Plants of the 1st year crop, 60x100, had more stems per plant than that of 1st year crop, 60x60, but amount of stems per ha1 was higher in the crop of 1st year crop, 60x60. The inundation early in 2010 led to the decrease of plant density of stinging nettle’s crop. Crop density in the spring was lower than that in the autumn. The greatest increase of amount of stems per plant was found in the plots of lower implantation density (60 x 100 cm). It could be that the optimal crop density (112-136 plants m-2) was already achieved in the crop of 4th and 5th cropping year, and it will not increase any more in more matured crop in following years. Further investigation would be intrigued.

Hagarová, Mária, Janette Brezinová, Gabriela Baranová, Ján Viňáš e Pavlo Maruschak. "Degradation of Components in Cars Due to Bimetallic Corrosion". Materials 14, n. 12 (16 giugno 2021): 3323. http://dx.doi.org/10.3390/ma14123323.

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This paper deals with the determination of the basic corrosion characteristics of metallic materials used as components in car construction to achieve a lighter vehicle with higher rigidity, a more complex “hybrid” of diverse materials is needed for the car body structure. Due to the different types of material used in the manufacture of components and their interactions, the issue of assessing the impact of bimetallic corrosion is currently relevant. Based on the potential difference at the end of the corrosion test, it was possible to determine the “anode index”, which determines the risk of degradation of materials due to bimetallic corrosion. In our case, a hot-galvanized steel sheet/Al alloy EN AW-6060 couple in deicing salt and hot-galvanized steel sheet/steel S355J0 couple in simulated acid rain solution (SARS) has proven to be “safest” and usable even for more aggressive environments. Hot-galvanized steel sheet/Al alloy EN AW-6060 in SARS solution is suitable for slightly aggressive environments. Stainless steel AISI 304/silumin A356 in deicing salt, stainless steel AISI 304/Al alloy EN AW-6060 in deicing salt, and stainless steel AISI 306/Al alloy EN AW-6060 in simulated exhaust gas environment (SEG solution) are not suitable for non-aggressive environments.

Novák, Pavel, e Patrik Burg. "Evaluation of harvest losses within a full mechanised grape harvest". Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 61, n. 3 (2013): 751–56. http://dx.doi.org/10.11118/actaun201361030751.

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A contribution deals with an evaluation of harvest losses within a full mechanised berries harvest using two self-propelled harvesters GREGOIRE G 152 and NEW HOLLAND VL 6060 differing in kinds of harvesting and catching mechanisms. Observation was done in vineyards of ZVOS Hustopeče joint–stock company at harvest of Müller Thurgau and Lemberger varieties in a period 2009–2010. Results gained under operating conditions showed that both self-propelled harvesters reached a comparable quality of a harvested product. There were observed losses by a slump in a case of using GREGOIRE G 152 harvester 0.8–1.45%. By using NEW HOLLAND VL 6060 the losses were 0.86–1.52% and data were gained with a respect to vine condition, the variety and the vintage. Next to losses by the slump also losses as non-harvested product were observed. Using GREGOIRE G 152 were reached 1.08–2.56% of non-harvested product losses and in a case of NEW HOLLAND VL 6060 similarly 1.17–2.22%. However a value of the non-harvested product losses cannot be perceived absolutely because in a practice the non-harvested grapes are consequently picked up manually. Total losses perceived as a sum of losses by the slump and non-harvested losses values were at GREGOIRE G 152 harvester 2–4% and at NEW HOLLAND VL 6060 harvester 2–3.7% of total hectare yield.

Wang, Chuan Qing, Deng Feng Wang, Wei Min Zhuang e Ming Xin Zhang. "Lightweight Study on Axial Crushing Thin Cylindrical Tubes of Steel and Aluminum Alloy Based on Equal Energy Absorption". Applied Mechanics and Materials 525 (febbraio 2014): 117–22. http://dx.doi.org/10.4028/www.scientific.net/amm.525.117.

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A thin cylindrical tube model was established. Its energy absorption property was analyzed when crushing through finite element method. Then its validity was verified through the corresponding experiment. On the basis of the above research, two different material tubes were selected which were aluminum alloy 6060 and cold-roll steel B340LA. Considering the mechanical performance of these two materials might change during dynamic crushing, so the tubes were crushed in three modes including low speed, medium speed and high speed. In order to predict the wall thickness of the two different material tubes when their energy absorption was equal, two methods were proposed which were overall energy method and the stress-strain energy method. Then get the mass ratio of the two different material tubes when they absorbed equal energy. The results showed that the mass of aluminum alloy 6060 tube was about 86%-90% to B340LA tube when they absorbed equal energy. More than 10% lightweight effect could be obtained when cold-roll steel B340LA tube was instead with aluminum alloy 6060 under the condition of their absorbing equal energy.

Knoedel, Peter, Stefanos Gkatzogiannis e Thomas Ummenhofer. "FE Simulation of Residual Welding Stresses: Aluminium and Steel Structural Components". Key Engineering Materials 710 (settembre 2016): 268–74. http://dx.doi.org/10.4028/www.scientific.net/kem.710.268.

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One of the decisive criteria in the selection of material between steel and aluminium could be the welding RS (residual stresses), which play an important role for the fatigue behavior of the structures under cycling loading. In the current paper simulations in commercial FE software ANSYS were carried out, in order to calculate the welding RS field for three different materials: structural steel S355 and the aluminum grades EN AW-6060 and EN AW-5754. In the case of EN AW-6060 influence of recrystallization on the yield strength of the HAZ (heat affected zone) was taken into consideration.

Hizamul-Din, Hanis Hamizah, e Normiza Mohamad Nor. "Analysis of Zinc Oxide (ZnO) Surge Arrester Connected to Various Ground Electrodes". Energies 14, n. 12 (8 giugno 2021): 3382. http://dx.doi.org/10.3390/en14123382.

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This paper presents impulse tests results on a zinc oxide (ZnO) surge arrester connected to four ground electrodes, with its resistance values ranging from 17 Ω to 104 Ω. It has been noted that when in series with various ground resistance values, the voltage–current characteristics of the zinc oxide (ZnO) surge arrester are far from the one tested using a common grounding, which is a standard measurement method described in IEC 60060-1. This paper clarifies the relationship between the surge arrester with various ground electrodes and its performance when tested with a common practice, based on IEC 60060-1. The tests carried out on a 15 kV ZnO surge arrester, under high-impulse conditions by field measurements, provide important information on the characteristics and ability of the surge arrester to adequately function in various ground electrodes.

KOHRING, G. A., e D. STAUFFER. "PARALLELISM ON THE INTEL 860 HYPERCUBE: ISING MAGNETS, HYDRODYNAMICAL CELLULAR AUTOMATA AND NEURAL NETWORKS". International Journal of Modern Physics C 03, n. 06 (dicembre 1992): 1165–78. http://dx.doi.org/10.1142/s0129183192000798.

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Geometric parallelization was tested on the Intel Hypercube with 32 MIMD processors of 1860 type, each with 16 Mbytes of distributed memory. We applied it to Ising models in two and three dimensions as well as to neural networks and two-dimensional hydrodynamic cellular automata. For system sizes suited to this machine, up to 60960*60960 and 1410*1410*1408 Ising spins, we found nearly hundred percent parallel efficiency in spite of the needed inter-processor communications. For small systems, the observed deviations from full efficiency were compared with the scaling concepts of Heermann and Burkitt and of Jakobs and Gerling. For Ising models, we determined the Glauber kinetic exponent z≃2.18 in two dimensions and confirmed the stretched exponential relaxation of the magnetization towards the spontaneous magnetization below Tc. For three dimensions we found z≃2.09 and simple exponential relaxation.

Più fonti

Tesi sul tema "60J60":

Schmidt, Daniel. "Kinetic Monte Carlo Methods for Computing First Capture Time Distributions in Models of Diffusive Absorption". Scholarship @ Claremont, 2017. https://scholarship.claremont.edu/hmc_theses/97.

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In this paper, we consider the capture dynamics of a particle undergoing a random walk above a sheet of absorbing traps. In particular, we seek to characterize the distribution in time from when the particle is released to when it is absorbed. This problem is motivated by the study of lymphocytes in the human blood stream; for a particle near the surface of a lymphocyte, how long will it take for the particle to be captured? We model this problem as a diffusive process with a mixture of reflecting and absorbing boundary conditions. The model is analyzed from two approaches. The first is a numerical simulation using a Kinetic Monte Carlo (KMC) method that exploits exact solutions to accelerate a particle-based simulation of the capture time. A notable advantage of KMC is that run time is independent of how far from the traps one begins. We compare our results to the second approach, which is asymptotic approximations of the FPT distribution for particles that start far from the traps. Our goal is to validate the efficacy of homogenizing the surface boundary conditions, replacing the reflecting (Neumann) and absorbing (Dirichlet) boundary conditions with a mixed (Robin) boundary condition.

Karagulyan, Avetik. "Sampling with the Langevin Monte-Carlo". Electronic Thesis or Diss., Institut polytechnique de Paris, 2021. http://www.theses.fr/2021IPPAG002.

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L’échantillonnage des lois aléatoires est un problème de taille en statistique et en machine learning. Les approches générales sur ce sujet sont souvent divisées en deux catégories: fréquentiste vs bayésienne. L’approche fréquentiste corresponds à la minimisation du risque empirique, c’est à dire à l’estimation du maximum vraisemblance qui est un problème d’optimisation, tandis que l’approche bayésienne revient à intégrer la loi postérieure. Cette dernière approche nécessite souvent des méthodes approximatives car l’intégrale n’est généralement pas tractable. Dans ce manuscrit, nous allons étudier la méthode de Langevin, basée sur la discrétisation de l’EDS de Langevin. La première partie de l’introduction pose le cadre mathématique et l’intérêt d’étudier plus avant la question de l'échantillonnage. La suite de l’introduction s’attache à la présentation des méthodes d’échantillonnage.Le premier article concerne les bornes non-asymptotiques sur la convergence en distance de Wasserstein de Langevin Monte-Carlo pour les fonctions de potentiel lisses et fortement convexes. Nous établissons d’abord des bornes explicites pour LMC avec des step-sizes variantes?. Puis nous étudions la convergence pour des fonctions de potentiel avec des gradients stochastiques. Enfin, deux types de discrétisation sont présentés, pour les potentiels plus réguliers.Dans la deuxième article nous abordons le problème d’échantillonnage de loi log-concave (pas fortement) en utilisant LMC, KLMC et KLMC2. Nous proposons une pénalisation quadratique constante de la fonction de potentiel. Puis nous prouvons des bornes non-asymptotiques sur l’erreur de Wasserstein de ces méthodes pour le choix de pénalisation optimale. Enfin, nous soulignons l’importance du choix de l’échelle pour le mesurage des complexités des différentes méthodes.La troisième contribution principales est concentrée sur la convergence de la diffusion de Langevin dans le case log-concave. Une pénalisation variable dans le temps est proposée pour la fonction de potentiel. Nous prouvons des bornes explicites pour cette méthode nommée Penalized Langevin Dynamics. A la fin, le lien entre les algorithmes de Langevin et l’optimisation convexe est établi, ce qui nous permet de prouver des bornes similaires pour le gradient flow
Sampling from probability distributions is a problem of significant importance in Statistics and Machine Learning. The approaches for the latter can be roughly classified into two main categories, that is the frequentist and the Bayesian. The first is the MLE or ERM which boils down to optimization, while the other requires the integration of the posterior distribution. Approximate sampling methods are hence applied to estimate the integral. In this manuscript, we focus mainly on Langevin sampling which is based on discretizations of Langevin SDEs. The first half of the introductory part presents the general mathematical framework of statistics and optimization, while the rest aims at the historical background and mathematical development of sampling algorithms.The first main contribution provides non-asymptotic bounds on convergence LMC in Wasserstein error. We first prove the bounds for LMC with the time-varying step. Then we establish bounds in the case when the gradient is available with a noise. In the end, we study the convergence of two versions of discretization, when the Hessian of the potential is regular.In the second main contribution, we study the sampling from log-concave (non-strongly) distributions using LMC, KLMC, and KLMC with higher-order discretization. We propose a constant square penalty for the potential function. We then prove non-asymptotic bounds in Wasserstein distances and provide the optimal choice of the penalization parameter. In the end, we highlight the importance of scaling the error for different error measures.The third main contribution focuses on the convergence properties of convex Langevin diffusions. We propose to penalize the drift with a linear term that vanishes over time. Explicit bounds on the convergence error in Wasserstein distance are proposed for the PenalizedLangevin Dynamics and Penalized Kinetic Langevin Dynamics. Also, similar bounds are proved for the Gradient Flow of convex functions

Mauland, Eirik. "Utherdbare bimetall materialer fremstilt ved skrueekstrudering: AA 6060/ren magnesium". Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for materialteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-21845.

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Skruekstrudering er en ny, innovativ prosess for å fremstille metaller. Prosessens store fortrinn er et relativt lav energiforbruk sammenliknet med tradisjonell ekstrudering, noe som i dagens energisamfunn er meget aktuelt. Prosessen går ut på å mate granuler/pulver i en skrue som transporterer og konsoliderer metallet mot en dyseåpning. Friksjon og deformasjonsenergi varmer opp godset sammen med påført induksjonsvarme i ekstruderingsdysen slik at det oppnås plastisk flyt i ekstruderingskammeret og godset presses gjennom dyseåpningen til en ferdig profil. I dette forsøket ble det undersøkt hvordan tilsats av ren magnesium granuler (rest AA6060 granuler) påvirket mikrostruktur og mekaniske egenskaper. Målet med ekstruderingen var å danne en Al/Mg metallmatriks kompositt (MMC). Fire komposisjoner ble skruekstrudert i forsøket: AA6060 + 5 wt % Mg AA6060 + 7,5 wt % Mg AA6060 + 10 wt % Mg AA6060 + 12,5 wt % Mg Ekstrudat av 5 wt % Mg og 7,5 wt % Mg gjennomgikk to herdeoppsett, utherding (T5) og inn- og utherding (T6). Mikrostuktur og mekaniske egenskaper ble undersøkt for ekstrudatene i herdetilstandene uherdet (F), utherdet (T5) og inn- og utherdet (T6). Det ble dannet et Al/Al3Mg2(Al12Mg17) AMMC etter skruekstrudering av hhv 5, 7,5, 10 og 12,5 wt % Mg. Matriksen bestod av Al(Mg), med spiralbånd og fint fordelt Al3Mg2(Al12Mg17). Det var store periodiske variasjoner i ekstruderingshastighet av 10 og 12,5 wt % Mg grunnet manglende flyt i materialet og minkende moment fra skruen grunnet minkende klebningsfriksjon ved økt Mg tilsats. 5 og 7,5 wt % Mg viste jevn ekstruderingshastighet. Fasefordelingen endret seg som funksjon av økt mg tilsats. 5 wt % Mg viste kun tydelige intermetalliske spiralbånd, mens 7,5, 10 og 12,5 wt % Mg i økende grad viste fint fordelte intermetalliske faser i matriksen i tillegg til de intermetalliske spiralbåndene. Den intermetalliske fasefordelingen over tverrsnittet var konsentrert i en sone mellom senter og ytterkant for alle ekstrudater. Sidekant og senter viste lite intermetalliske faser. Ekstrudatene viste økende flytespenning, strekkfasthet og hardhet som funksjon av økt Mg tilsats for ekstrudatene med hhv 5, 7,5 og 10 wt % Mg tilsats. Dette var et resultat av økt arbeidsherding og fast løsningsherding grunnet høyere mengder Mg i matriksen og økt dispersjonsherding fra de intermetalliske fasene som økte i omfang og fordeling i matriksen. Forlengelsen avtok som funksjon av økt Mg tilsats. De mekaniske egenskapene varierte betraktelig mellom parallellene i hvert ekstrudat og vitnet om inhomogene ekstrudatlengder. Majoriteten av Al(Mg) matriksen til alle ekstrudater viste en fin likeakset dynamisk rekrystallisert kornstruktur på <15 m. Kornstrukturen omkring intermetalliske faser inneholdt deformert kornstruktur av feedstock strukturen i tillegg til dynamisk rekrystallisert struktur. T5 herding ga herdebidrag til flytespenningen for 5 wt % Mg på ca 70 % og ca 10-20 % for 7,5 wt % Mg. T6 herding ga herdebidrag til flytespenningen for 5 wt % Mg på ca 40-70 % og ca 10-20 % for 7,5 wt % Mg. Mikrostrukturen til T6 herdede prøver viste omfattende rekrystallisering og kornvekst i områdene ut mot sidekantene, foruten dette var kornstrukturen tilnærmet uavhengig av herdingen. Strekkprøvene av 5 wt % Mg viste duktil bruddprofil, strekkprøvene av 7,5 wt % Mg viste kombinert sprø og duktil bruddprofil og strekkprøvene av hhv 10 og 12,5 wt % Mg viste sprø bruddprofil. Bruddprofilen til 7,5, 10 og 12,5 wt % Mg viste delaminering i spiralbånd med intermetalliske faser over tverrsnittet. Et konservativt overslag viste at overgangen mellom duktil til sprø bruddprofil inntraff ved hardheter mellom 70-80 og 90-100 HV(1) i matriks.

Moazzam, Muhammad. "The role of the WASP family proteins in cellular migration and invasion in prostate cancer". Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/60160/.

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Prostate cancer metastasis is a complex process, involving multiple pathways in its orchestration. Malignant cells are influenced by different growth factors from the extracellular environment which promote or inhibit cell movement and metastasis. HGF has been implicated in progression and metastasis of prostate cancer. A cell interacts with the environment through surface molecules like integrins. These interactions are further translated in to different responses through various intracellular machineries. Furthermore organization of the actin cytoskeleton is vital for many cellular functions. WAVEs are member of WASP family of proteins, which have important role in regulation of actin dynamics through regulation of actin related protein (ARP 2/3). The role of individual members of WASP family has been investigated in development and progression of different cancers. We documented the expression of different WAVE family members in various prostate cancer cell lines. Expression of WAVE-3 was effectively knocked down with the use of hammer head ribozymes. Loss of WAVE-3 expression resulted in reduced cell movement and invasion in the PC-3 cell line. These cells failed to show any significant increase in cellular movement and invasive potential following treatment with HGF. Further experiments to investigate the underlying mechanism of this phenotypic change revealed that optimum levels of phosphorylated paxillin play an important role in this change. Our study also indicates that reduced potential of invasive capability following WAVE-3 knock down, may be related to reduced availability of MMP-2 in the cellular environment.

Graf, P. O. "Combining oxidative coupling and reforming of methane vision or utopia? /". Enschede : University of Twente [Host], 2009. http://doc.utwente.nl/60460.

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Morgado, Norbert. "Tréfilage à chaud de l'aluminium 6060 : nouvelle méthodologie d'identification du comportement tribologique". Valenciennes, 2003. http://ged.univ-valenciennes.fr/nuxeo/site/esupversions/38039928-2561-413f-987a-d3f0fe90893f.

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L'étude proposée s'appuie sur le procédé instrumenté de tréfilage à chaud de l'aluminium. Ce procédé est analysé d'un point de vue thermomécanique afin de dégager l'importance des paramètres d'interface dans la maîtrise du procédé. Les paramètres prépondérants sont le coefficient de frottement et le coefficient de transfert thermique entre le fil et la filière. La mise en place d'un nouveau banc d'essai permet d'identifier ces paramètres. Le banc, équipé d'un système de chauffage par induction et d'un système hydraulique asservi, permet de reproduire au plus près les conditions de contact thermomécaniques rencontrées en mise en forme à chaud. Une méthodologie multi niveaux, s'appuyant sur l'exploitation des résultats issus du banc, est présentée. Celle-ci permet de répondre à diverses attentes en terme d'optimisation de procédé, de caractérisation de conditions de frottement, d'analyse de défauts de surface (collage) ou de détermination de lois tribologiques
The proposed study is based on the specific hot wire drawing process of aluminium. This process is thermomechanically analysed in order to point out the importance of interface parameters in the process control. The main parameters are the friction coefficient and the heat transfer coefficient. A new test device is developed to evaluate them. This test is made of a heating induction system and a servo-hydraulic system. It allows to reproduce accurately the thermomechanical contact conditions observed in hot metal forming. A multi level methodology, using exploitation of test device results, is presented. It allows to optimize the process, to identify friction conditions, to analyse surface damages (sticking) or to estimate tribological laws

Monteiro, Paulo Cyhlar. "Efeito do perfil de envelhecimento artificial nas ligas AI 6060 e 6061". Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/17771.

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Mestrado em Engenharia de Materiais
Este trabalho teve como objetivo estudar a influência do perfil térmico de envelhecimento artificial nas propriedades mecânicas das ligas Al 6060 e 6061. Para tal foram cedidos pela Extrusal, provetes, biletes e fatias das ligas em questão. Da liga 6061 os lotes de material vieram na condição de homogeneizados (direto do fornecedor); extrudidos na empresa com envelhecimento térmico natural (T4) e armazenamento em fábrica e dispositivo de frio; também extrudidos na empresa com envelhecimento artificial (T6), igualmente conservados em ambiente de fábrica e congelados; da liga 6060 foi fornecida uma fatia na condição de homogeneizada. Para verificar qual a influência do perfil térmico de envelhecimento artificial nas propriedades mecânicas das ligas Al 6060 e 6061, amostras retiradas das fatias homogeneizadas foram submetidas a um tratamento térmico de envelhecimento, com velocidade de aquecimento de 1 ºC/min ou de 10 ºC/min, com um patamar isotérmico de envelhecimento a 180 ºC, seguido de arrefecimento ao ar ou em água. Foram feitos testes de dureza (Vickers) para perceber o efeito na dureza das diversas condições térmicas no processamento da liga. A análise microestrutural e composicional através de SEM, TEM e EDS foi usada para explicar as variações de comportamento. Os resultados obtidos confirmaram a adequação das condições dos biletes à chegada, e da eficácia do tratamento T6. Parece igualmente irrelevante o efeito do envelhecimento natural nos ensaios realizados. Como complemento, foi ainda identificada a importância de eventuais cargas com diferentes massas térmicas, suscetíveis de introduzir diferentes perfis de envelhecimento em condições nominalmente semelhantes.
The main purpose of this study was to study the influence of the thermal profile of artificial aging on the mechanical properties of Al 6060 and 6061 alloys. These alloys were provided by Extrusal as billets and extruded parts. The 6061 alloy samples were obtained in distinct conditions: homogenized billets (from supplier), extruded parts with natural thermal aging (T4) and storage at room temperature or in ice; also extruded parts with artificial aging (T6), again after storage at room temperature or in ice. Alloy 6060 was provided only as a billet slice in homogenized condition. To check the influence of the thermal profile during artificial ageing on mechanical properties of Al 6060 and 6061, samples taken from the homogenized slices were subjected to an aging heat treatment at a heating rate of 1 °C / min or 10 °C / min with isothermal ageing at 180 ° C followed by cooling in air or water. Hardness tests were made (Vickers) to realize the effect on hardness of the various thermal conditions in alloy processing. The microstructural and compositional analysis by SEM, TEM and EDS was used to explain variations in behavior. The results confirmed the appropriateness of the conditions of billets on arrival, and the effectiveness of the T6 treatment. It also seemed irrelevant the effect of natural aging in these tests. As a complement, the importance of different thermal masses in thermal ageing was confirmed, being able to generate different ageing profiles under nominally similar conditions.

Nelson, Camilla. "Reading and writing with a tree : practising 'Nature Writing' as enquiry". Thesis, University of the Arts London, 2012. http://ualresearchonline.arts.ac.uk/6060/.

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This thesis reframes, or reforms, ‘nature writing’ (‘Nature Writing Reformed’) through the practical and theoretical recombination of human, tree, and page. Understandings of ‘writing’, ‘nature’, and their phrasal relation in ‘nature writing’, are explored through a sustained enquiry into the reading and writing practices principally undertaken by the author (Camilla Nelson) in relation to one specific apple tree in the walled garden of University College Falmouth’s Tremough Campus, Cornwall. The central claim of this thesis is that composition is always environmentally constructive and constructed: how (the method with which) you read and write, and where (the environment in which) you read and write, i.e. the situation and materials you read and write with, affect not only the composition of the written text but the composition of the human, as well as the other-than-human, entities involved in this practice. This thesis is explicitly structured as an interweave of variously material (word; page; room; box; walled garden; library; studio; tree) and conceptual (word; page; theory; footnote; hyperlink; field of research) framing devices (and / or environments). The structure of this thesis and that of the orchard and studio installations, which together constitute the final PhD research submission, play on the variety of framing and reframing that occurs in relation to the spatio-temporal specifics of material and conceptual composition (as evidenced in the Media Log). This ‘reform’ of nature writing, as an interweave of human and other-than-human environments (or frames), is developed in relation to Mark Johnson’s expanded theory of ‘mind’ by way of the conceptual and material practice of metaphor (Johnson, 2007). This thesis combines the theories and practices derived from the (prinicipal) field of ‘Nature Writing’ (as defined in the correspondingly titled chapter), with those suggested by contemporary developments in cognitive philosophy, neuroscience, microbiology, systems theory, and translation studies.

Braccini, Michele. "Intelligenza artificiale: test di Turing e alcune questioni filosofiche". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/6060/.

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Martingo, Ângelo Miguel Quaresma Gomes. "Music as postmodern thought : a critical examination of George Crumb's Makrokosmos I". Thesis, University of Sheffield, 2004. http://etheses.whiterose.ac.uk/6060/.

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This thesis discusses the piano works of George Crumb, particularly Makrokosmos I, in the light of the Adornian critique of the post-war avant-garde and of Lyotard's theorisation of the postmodem. According to Adomo and Lyotard, modem thought is characterised by a totalising nature and both the Adomian critique of the post-war avant-garde and Lyotard's theorising of the postmodern are directed toward the critique of that character. This thesis shows the way in which Crumb's composition responds to this critique of modernity. Elements of musical structure, text treatment, exploration of timbre, spatiality (music notation and stage setting), and citational practice are identified through an analysis of Makrokosmos L These elements are contextualised both within Crumb's oeuvre (particularly, the piano literature) and within the musical and theoretical production of the post-war avant-garde, and finally, discussed with reference to Lyotard and Adomo's critique of modem thought. It is shown that, in contrast to the self-referentiality of music composition which pervades both integral serialism and experimentalism, Crumb's articulation of musical materials obeys a logic of montage resulting from the blocking of two incommensurable modes of sense, notably, musical structure (analytic unity of the work), and elements which deconstruct that structure (namely timbre, and notation). In addition to the perspective of historical musicology, the investigation discusses specific compositional elements from the point of view of perception (namely timbre) and representation (notably citation, text setting). By doing so, it is intended to show that Crumb deconstructs the totalising rationality pervading modem thought from not only an expressive but also a critical point of view.

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Libri sul tema "60J60":

Waechter-Böhm, Liesbeth. 6060 Hall in Tirol: Neue Architektur. Hall in Tirol: Ablinger.Garber, 2006.

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Management, Nichols Applied. Steam locomotive 6060: An opportunity analysis and feasibility assessment. [Edmonton, Alta]: Alberta Tourism, 1989.

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Mycroft, Alan, a cura di. Static Analysis. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/3-540-60360-3.

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Golbeck, Amanda L., a cura di. Leadership in Statistics and Data Science. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-60060-0.

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Guger, Christoph, Brendan Z. Allison e Michael Tangermann, a cura di. Brain-Computer Interface Research. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-60460-8.

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Gray, Iain. Snake Charming - The Musical Python. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60660-6.

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Lucotte, Marc, Roger Schetagne, Normand Thérien, Claude Langlois e Alain Tremblay, a cura di. Mercury in the Biogeochemical Cycle. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60160-6.

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Lang, Erich K., a cura di. Radiology of the Female Pelvic Organs. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-60260-3.

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Patterson, William. Democratic Counterinsurgents. New York: Palgrave Macmillan US, 2016. http://dx.doi.org/10.1057/978-1-137-60060-8.

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Schaeffer, Helmut A., e Roland Langfeld. Werkstoff Glas. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-60260-7.

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Capitoli di libri sul tema "60J60":

Zhang, Wei, Jim Metson, C. L. Nguyen e S. Chen. "Surface Characterization of an Extruded 6060 Al Alloy". In Advanced Materials and Processing IV, 67–70. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-466-9.67.

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Chen, Hui, Danai Giannopoulou, Thomas Greß, Tim Mittler, Jonas Isakovic, Wolfram Volk e Noomane Ben Khalifa. "Co-Extrusion of Compound-Cast AA7075/6060 Bilayer Billets at Various Temperatures". In Forming the Future, 993–1001. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75381-8_83.

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Sato, Shuji, Seisuke Nishimura, Hiroyuki Shimizu e Hisatoshi Iked. "Proposal for the Lightning Impulse Voltage Parameters Evaluation Procedure in IEC 60060-1:2010". In Lecture Notes in Electrical Engineering, 650–62. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31680-8_64.

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Forbord, Børge, Ragnvald H. Mathiesen e Hans J. Roven. "X-Ray Diffraction Studies of Grain Growth in an Ultra-fine Grained 6060 Aluminium Alloy". In Materials Science Forum, 1299–304. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-443-x.1299.

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Schmidt, David A. "Natural-semantics-based abstract interpretation (preliminary version)". In Static Analysis, 1–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/3-540-60360-3_28.

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Tofte, Mads. "Region inference for higher-order functional languages". In Static Analysis, 19–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/3-540-60360-3_29.

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Wolper, Pierre, e Bernard Boigelot. "An automata-theoretic approach to Presburger arithmetic constraints". In Static Analysis, 21–32. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/3-540-60360-3_30.

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Alt, Martin, e Florian Martin. "Generation of efficient interprocedural analyzers with PAG". In Static Analysis, 33–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/3-540-60360-3_31.

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Cleaveland, Rance, Purush Iyer e Daniel Yankelevich. "Optimality in abstractions of model checking". In Static Analysis, 51–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/3-540-60360-3_32.

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Colby, Christopher. "Determining storage properties of sequential and concurrent programs with assignment and structured data". In Static Analysis, 64–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/3-540-60360-3_33.

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Atti di convegni sul tema "60J60":

Saadeddine, Hanane, Mohamed Agazar e Dominique Fortune. "New reference systems for the calibration of HV impulses at LNE". In 19th International Congress of Metrology (CIM2019), a cura di Sandrine Gazal. Les Ulis, France: EDP Sciences, 2019. http://dx.doi.org/10.1051/metrology/201911004.

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Driven by the need for traceable measurement methods, LNE has developed and characterized new reference measurement systems for the calibration of HV impulses, including lightning impulses (1, 2 µs/ 50 µs) and switching impulses (250 µs/ 2500 µs), according to new requirements of IEC 60060-1 and IEC 60060-2. This paper describes new reference measurement systems, which have been developed and fully characterized at LNE. In addition, the paper describes the test procedure for accurate measurements especially for in-situ calibrations in 5 successive steps; measurements of radiofrequency disturbances, step response of voltage dividers, measurement of the scale factors of voltage dividers, calibration of digitizer’s channels and ranges, measurement of the voltage linearity of the divider under calibration up to maximum voltage.

Sato, S., T. Harada e M. Hanai. "IEC 60060- 1 Requirements in Impulse Current Waveform Parameters". In 2005 International Power Engineering Conference. IEEE, 2005. http://dx.doi.org/10.1109/ipec.2005.206932.

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Sato, S., T. Harada e M. Hanai. "IEC 60060-1 requirements in impulse current waveform parameters". In 2005 International Power Engineering Conference. IEEE, 2005. http://dx.doi.org/10.1109/ipec.2005.207088.

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PRESZ, W. "Hybrid SPD process of aluminium 6060 for microforming". In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-90.

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Abstract. The increasing share and expansion of miniature devices requires the mastery of miniature parts production, including metal parts. In metal microforming, due to the conditions of mechanical similarity, the aim is to use materials with the smallest grain. Ultra-fine-grained metals (UFG) fulfill this requirement. These metals can be obtained, inter alia, in SPD processes such as ECAP. The work uses the extension of the SPD based on ECAP with additional metal forming operations necessary to obtain blanks for microforming in the form of a 0.2 mm foil. Three variants of the technological process were performed. This foil was then subjected to a micro-drawing operation aimed at determining the influence of the foil preparation process on the sheet metal microforming process flow.

"Petrographic Diagnosis of Alkali-Aggregate Reaction in Concrete Based on Quantitative EPMA Analysis". In SP-179: Fourth CANMET/ACI/JCI Conference: Advances in Concrete Technology. American Concrete Institute, 1998. http://dx.doi.org/10.14359/6060.

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Glo¨smann, Philipp, e Edwin Kreuzer. "Nonlinear State Monitoring With Karhunen-Loe`ve-Transform". In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60260.

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Nonlinear dynamical systems often appear to have uncorrelated output. This characteristic leads to the idea of analyzing the dynamics of nonlinear systems with methods developed for random processes. The Karhunen-Loe`ve-Transform (KLT) was designed to detect coherent structures in random process data. It can also be applied for state monitoring of complex systems. This paper gives a short review on the mathematical concept of the KLT and discusses an approach to characterize the dynamics of nonlinear systems based on experimental data.

Steger, John Ryan, Ronald M. Chung, Kevin Lin e Homayoon Kazerooni. "Design of a Spatial Linkage Haptic Interface". In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60060.

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This paper describes the mechanical and electrical design of a compact high fidelity desktop haptic interface that provides three-degree-of-freedom point-force interaction through a handheld pen-like stylus. The complete haptic device combines a spatial linkage, actuation, power amplification, and control electronics in a standalone package with a footprint similar to that of a notebook computer (33cm × 25cm × 10cm). The procedure used to design the statically balanced spatial linkage is explained and both an inexpensive lightweight plastic version and a high stiffness, high strength, aluminum and stainless steel version are presented. The theory and implementation of sinusoidal encoder interpolation and sinusoidal servo-motor commutation used to achieve high-fidelity haptic simulation is covered for two versions of electronic control hardware: custom hardware based on a digital signal processor (DSP) and an off-the-shelf design based on an embedded PC.

Pereyra, R., e Y. L. Shen. "Characterization of Indentation-Induced “Particle Crowding” in Metal Matrix Composites". In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60560.

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A direct experimental characterization of reinforcement configuration in an indentation-deformed metal matrix composite is undertaken. The primary objective is to quantify the possible local increase in particle concentration, which has been proposed to cause inconsistency in the indentation hardness and the overall composite strength. Quantitative metallography on the post-indented material is carried out to measure the particle volume fraction. Multiple cross sections of an indentation are investigated with statistically significant results obtained. A distinct increase in particle concentration induced by the indentation is found. The spatial distribution of particle concentration is also examined in detail. The residual compressive stress field remained in the material upon unloading, as illustrated by the finite element analysis, is shown to be in qualitative agreement with the measurement.

Jansen, E. L. "The Effect of Boundary Conditions on Nonlinear Vibration and Flutter of Laminated Cylindrical Shells". In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60960.

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A nonlinear vibration analysis of cylindrical shells is presented, in which the specified boundary conditions at the shell edges can be satisfied rigorously. The method is based on a perturbation expansion for both the frequency parameter and the dependent variables. The present theory includes the effects of finite vibration amplitudes, initial geometric imperfections and a nonlinear static deformation. Nonlinear Donnell-type equations formulated in terms of the radial displacement W and an Airy stress function F are used, and classical lamination theory is employed. Further, an extension of the theory is presented to analyze linearized flutter in supersonic flow, based on piston theory. The effect of different types of boundary conditions on the nonlinear vibration and linearized flutter behavior of cylindrical shells is illustrated for several characteristic cases.

Wang, Minglu, Mingguang Zheng, Cheng Ye, Zhongming Qiu e Zhenqin Xiong. "An Experimental Study of Closed Loop Two-Phase Thermosyphon for Spent Fuel Pool Passive Cooling". In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60460.

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The study reported here examined a closed loop two-phase thermosyphon (CLTPT) of evaporator length 7.6m and internal diameter 65mm used to cool the spent fuel pool. This experimental study investigates the thermal performances and heat and mass transfer characteristic of CLTPT by examining the thermodynamic cycles and overall thermal resistances with ammonia, R134a and water as the working fluid. Measurements of temperature and pressure distributions of the fluid around the loop were made under various conditions. Results show that this loop operates with low filling ratio, low mass flow rate, and high heat-transfer coefficient and the CLTPT has the ability to cool the spent fuel pool. The working fluid flowing through the heat pipe evaporator section generally experienced a subcooled zone, pool boiling zone and high gas quality two-phase region. The average heat transfer coefficient of evaporator reaches 450 W/m2•°C using R134a as working fluid. The thermal resistance of R134a is always smaller than ammonia but the thermal resistance of water is largest at small temperature difference while is smallest when temperature difference is large.