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Статті в журналах з теми "Mount (Vic )"
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Sasso, Eleonora. "‘[T]his world is now thy pilgrimage’: William Michael Rossetti's Cognitive Maps of France and Italy." Victoriographies 8, no. 1 (March 2018): 84–99. http://dx.doi.org/10.3366/vic.2018.0296.
Повний текст джерелаАнотація:
This paper takes as its starting point the conceptual metaphor ‘life is a journey’ as defined by Lakoff and Johnson (1980) in order to advance a new reading of William Michael Rossetti's Democratic Sonnets (1907). These political verses may be defined as cognitive-semantic poems, which attest to the centrality of travel in the creation of literary and artistic meaning. Rossetti's Democratic Sonnets is not only a political manifesto against tyranny and oppression, promoting the struggle for liberalism and democracy as embodied by historical figures such as Napoleon, Mazzini, Cavour, and Garibaldi; but it also reproduces Rossetti's real and imagined journeys throughout Europe in the late nineteenth century. This essay examines these references in light of the issues they raise, especially the poet as a traveller and the journey metaphor in poetry. But its central purpose is to re-read Democratic Sonnets as a cognitive map of Rossetti's mental picture of France and Italy. A cognitive map, first theorised by Edward Tolman in the 1940s, is a very personal representation of the environment that we all experience, serving to navigate unfamiliar territory, give direction, and recall information. In terms of cognitive linguistics, Rossetti is a figure whose path is determined by French and Italian landmarks (Paris, the island of St. Helena, the Alps, the Venice Lagoon, Mount Vesuvius, and so forth), which function as reference points for orientation and are tied to the historical events of the Italian Risorgimento. Through his sonnets, Rossetti attempts to build into his work the kind of poetic revolution and sense of history which may only be achieved through encounters with other cultures.
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George, R., J. Lee, R. Stewart, T. Bayul, N. Campisi, F. Olale, A. Schier, J. Kanki, and A. T. Look. "Cloning and characterization of the sympathetic nervous system mutant, Sym3, in zebrafish." Journal of Clinical Oncology 25, no. 18_suppl (June 20, 2007): 9541. http://dx.doi.org/10.1200/jco.2007.25.18_suppl.9541.
Повний текст джерелаАнотація:
9541 Background: Neuroblastoma (NB) is a neural crest tumor manifesting in the adrenal gland and the sympathetic ganglia. The goal of this project was to use the zebrafish model to identify genes involved in the development of the peripheral sympathetic nervous system (PSNS). We used the expression of tyrosine hydroxylase (TH) in the cervical sympathetic ganglion (cervical complex, CC), as a marker for PSNS development. TH expression can be observed by whole-mount RNA in situ hybridization in 2–3-day zebrafish embryos in the CC. Methods: In an ethyl nitrosourea mutagenesis screen for mutations that affect PSNS development, we identified a putative mutant, Sym3, showing a change in modeling of the TH staining cells in the region of the CC. Results and Conclusion: The TH-positive cells were scattered rather than conglomerated together as is typical of cells in the normal CC. The mutant was also characterized by a “curly-tail” phenotype. After the mutation was recovered from the F3 generation, heterozygous pairs harboring the mutation were identified. Using genome wide scanning PCR assay, linkage of the Sym3 mutation to microsatellite markers z9704 and z1351, located on Linkage Group 1, was established. Complementation assays were performed with other known “curly tail” mutants in the genetic interval, which revealed that Sym3 and a previously described vic mutant were in the same complementation group. The vic mutant is characterized by curved body axis, left to right asymmetry and kidney cysts and results from a mutation in the ARL13b gene, a protein of the Ras superfamily involved in intracellular trafficking and cilial motility. The vic mutation is a C to A transition at position 104 in the second exon of the open reading frame (T35L). The ARL13b gene in Sym3 has a four aa insertion at the 5’ end of the 4th exon of the coding region.The mutant Sym3 phenotype can be rescued by overexpression of the normal ARL13b gene. The vic mutant showed defective cilia formation in the kidney. However, immunocytochemistry showed normal cilia in the Sym3 mutant, suggesting that the Sym3 allele of ARL13b affects the development of alternative tissues during development, such as the aggregation of sympathetic neurons into discrete ganglia. Further functional characterization of the Sym3 mutation is ongoing. No significant financial relationships to disclose.
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Lee, K., Y. Shim, S. Lee, M. Cho, Y. Mun, C. Seong, and S. Lee. "Prognostic significance of CD44s expression in bile duct carcinomas." Journal of Clinical Oncology 24, no. 18_suppl (June 20, 2006): 14071. http://dx.doi.org/10.1200/jco.2006.24.18_suppl.14071.
Повний текст джерелаАнотація:
14071 Background: CD44 is a surface glycoprotein and has a key role for surface hyaluronan receptor, which is associated with adhesion and metastasis in many solid tumors. There are CD44 standard isoform (CD44s) and ten variant isoforms (CD44v1–10). CD44s and CD44 variant 6 (CD44v6) were evaluated to clarify the applicable prognostic factor in patients with bile duct carcinomas. Methods: A retrospective study was performed in bile duct carcinomas. Immunohistochemical stain was done with primary antibodies for CD44 (Novocastra, Newcastle upon Tyne, UK) and CD44v6 (Novocastra) using automated machine (Vision Biosystems, Mount Waverley, VIC, Australia) and bond polymer detection system with counterstain (Vision Biosystems) in paraffin embedded tissues. The extent of staining categorized as 0% (none), <10% (weak), 10%-50% (moderate), and >50% (strong). Clinical characteristics including age, sex, stage, grade and overall survival were reviewed. Results: Ninety six patients (M:F=35:61) were evaluated and the median age of these patients was 64 years old (37∼86). The rate of overexpression (>10%) of CD44s was 50% and the rate of CD44v6 expression was 16.9%. With median 34.2 months of follow up, the overall survival of total 96 patients was 12.2 months. The Cox proportional hazards test identified CD44s overexpression. (HR:2.379, 95% CI:1.195–4.736, p=0.014) and the stage as prognostic factors. But the expression of CD44v6 (weak vs. moderate to strong, HR:3.983, 95%CI:0.295–1.588, p=0.377) showed no prognostic significance on overall survival. Conclusion: CD44s overexpression can be a poor prognostic marker in bile duct carcinomas. And there is a potential to apply postoperative investigational or aggressive therapy in this poor prognostic group. No significant financial relationships to disclose.
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Lis, Grzegorz J., Andrzej Dubrowski, Maciej Lis, Bernard Solewski, Karolina Witkowska, Veronika Aleksandrovych, Ewa Jasek-Gajda, Mateusz K. Hołda, Krzysztof Gil та Jan A. Litwin. "Identification of CD34+/PGDFRα+ Valve Interstitial Cells (VICs) in Human Aortic Valves: Association of Their Abundance, Morphology and Spatial Organization with Early Calcific Remodeling". International Journal of Molecular Sciences 21, № 17 (31 серпня 2020): 6330. http://dx.doi.org/10.3390/ijms21176330.
Повний текст джерелаАнотація:
Aortic valve interstitial cells (VICs) constitute a heterogeneous population involved in the maintenance of unique valvular architecture, ensuring proper hemodynamic function but also engaged in valve degeneration. Recently, cells similar to telocytes/interstitial Cajal-like cells described in various organs were found in heart valves. The aim of this study was to examine the density, distribution, and spatial organization of a VIC subset co-expressing CD34 and PDGFRα in normal aortic valves and to investigate if these cells are associated with the occurrence of early signs of valve calcific remodeling. We examined 28 human aortic valves obtained upon autopsy. General valve morphology and the early signs of degeneration were assessed histochemically. The studied VICs were identified by immunofluorescence (CD34, PDGFRα, vimentin), and their number in standardized parts and layers of the valves was evaluated. In order to show the complex three-dimensional structure of CD34+/PDGFRα+ VICs, whole-mount specimens were imaged by confocal microscopy, and subsequently rendered using the Imaris (Bitplane AG, Zürich, Switzerland) software. CD34+/PDGFRα+ VICs were found in all examined valves, showing significant differences in the number, distribution within valve tissue, spatial organization, and morphology (spherical/oval without projections; numerous short projections; long, branching, occasionally moniliform projections). Such a complex morphology was associated with the younger age of the subjects, and these VICs were more frequent in the spongiosa layer of the valve. Both the number and percentage of CD34+/PDGFRα+ VICs were inversely correlated with the age of the subjects. Valves with histochemical signs of early calcification contained a lower number of CD34+/PDGFRα+ cells. They were less numerous in proximal parts of the cusps, i.e., areas prone to calcification. The results suggest that normal aortic valves contain a subpopulation of CD34+/PDGFRα+ VICs, which might be involved in the maintenance of local microenvironment resisting to pathologic remodeling. Their reduced number in older age could limit the self-regenerative properties of the valve stroma.
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Boussena, M., and B. T. Davies. "An adjustable vice mount." Applied Ergonomics 20, no. 2 (June 1989): 141–42. http://dx.doi.org/10.1016/0003-6870(89)90138-5.
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Verhulst, Kristal R., Anna Karion, Jooil Kim, Peter K. Salameh, Ralph F. Keeling, Sally Newman, John Miller, et al. "Carbon dioxide and methane measurements from the Los Angeles Megacity Carbon Project – Part 1: calibration, urban enhancements, and uncertainty estimates." Atmospheric Chemistry and Physics 17, no. 13 (July 7, 2017): 8313–41. http://dx.doi.org/10.5194/acp-17-8313-2017.
Повний текст джерелаАнотація:
Abstract. We report continuous surface observations of carbon dioxide (CO2) and methane (CH4) from the Los Angeles (LA) Megacity Carbon Project during 2015. We devised a calibration strategy, methods for selection of background air masses, calculation of urban enhancements, and a detailed algorithm for estimating uncertainties in urban-scale CO2 and CH4 measurements. These methods are essential for understanding carbon fluxes from the LA megacity and other complex urban environments globally. We estimate background mole fractions entering LA using observations from four extra-urban sites including two marine sites located south of LA in La Jolla (LJO) and offshore on San Clemente Island (SCI), one continental site located in Victorville (VIC), in the high desert northeast of LA, and one continental/mid-troposphere site located on Mount Wilson (MWO) in the San Gabriel Mountains. We find that a local marine background can be established to within ∼ 1 ppm CO2 and ∼ 10 ppb CH4 using these local measurement sites. Overall, atmospheric carbon dioxide and methane levels are highly variable across Los Angeles. Urban and suburban sites show moderate to large CO2 and CH4 enhancements relative to a marine background estimate. The USC (University of Southern California) site near downtown LA exhibits median hourly enhancements of ∼ 20 ppm CO2 and ∼ 150 ppb CH4 during 2015 as well as ∼ 15 ppm CO2 and ∼ 80 ppb CH4 during mid-afternoon hours (12:00–16:00 LT, local time), which is the typical period of focus for flux inversions. The estimated measurement uncertainty is typically better than 0.1 ppm CO2 and 1 ppb CH4 based on the repeated standard gas measurements from the LA sites during the last 2 years, similar to Andrews et al. (2014). The largest component of the measurement uncertainty is due to the single-point calibration method; however, the uncertainty in the background mole fraction is much larger than the measurement uncertainty. The background uncertainty for the marine background estimate is ∼ 10 and ∼ 15 % of the median mid-afternoon enhancement near downtown LA for CO2 and CH4, respectively. Overall, analytical and background uncertainties are small relative to the local CO2 and CH4 enhancements; however, our results suggest that reducing the uncertainty to less than 5 % of the median mid-afternoon enhancement will require detailed assessment of the impact of meteorology on background conditions.
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Guo, Li-Xin, and Dinh-Nam Dao. "A new control method based on fuzzy controller, time delay estimation, deep learning, and non-dominated sorting genetic algorithm-III for powertrain mount system." Journal of Vibration and Control 26, no. 13-14 (December 30, 2019): 1187–98. http://dx.doi.org/10.1177/1077546319890188.
Повний текст джерелаАнотація:
This article presents a new control method based on fuzzy controller, time delay estimation, deep learning, and non-dominated sorting genetic algorithm-III for the nonlinear active mount systems. The proposed method, intelligent adapter fractions proportional–integral–derivative controller, is a smart combination of the time delay estimation control and intelligent fractions proportional–integral–derivative with adaptive control parameters following the speed range of engine rotation via the deep neural network with the optimal non-dominated sorting genetic algorithm-III deep learning algorithm. Besides, we proposed optimal fuzzy logic controller with optimal parameters via particle swarm optimization algorithm to control reciprocal compensation to eliminate errors for intelligent adapter fractions proportional–integral–derivative controller. The control objective is to deal with the classical conflict between minimizing engine vibration impacts on the chassis to increase the ride comfort and keeping the dynamic wheel load small to ensure the ride safety. The results of this control method are compared with that of traditional proportional–integral–derivative controller systems, optimal proportional–integral–derivative controller parameter adjustment using genetic algorithms, linear–quadratic regulator control algorithms, and passive drive system mounts. The results are tested in both time and frequency domains to verify the success of the proposed optimal fuzzy logic controller–intelligent adapter fractions proportional–integral–derivative control system. The results show that the proposed optimal fuzzy logic controller–intelligent adapter fractions proportional–integral–derivative control system of the active engine mount system gives very good results in comfort and softness when riding compared with other controllers.
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Oh, Jong Seok, and Seung Bok Choi. "Vibration Control of an Engine Mount for UAV Activated by Piezostack Actuator." Applied Mechanics and Materials 52-54 (March 2011): 358–64. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.358.
Повний текст джерелаАнотація:
In this paper, vibration control performance of piezostack active engine mount system for unmanned aero vehicle (UAV) is evaluated via computer simulation. As a first step, the dynamic model of engine mount system which is supported at three points is derived. In the configuration of engine mount system, the inertia type of piezostack based active mount is installed for active vibration control. Then, the vibration level of UAV engine is measured. To attenuate the vibration which is transmitted from engine, a sliding mode controller which is robust to uncertain parameters is designed. Vibration control performances of active engine mount system are evaluated at each mount and center of gravity. Effective Control results are presented in both time and frequency domains.
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Lo Presti, Giuseppe, Aritz Brosa Iartza, and Sebastian Bukowiec. "Samba and CERNBox: Providing online access to Windows-based users at CERN." EPJ Web of Conferences 251 (2021): 02024. http://dx.doi.org/10.1051/epjconf/202125102024.
Повний текст джерелаАнотація:
This paper presents the experience in providing CERN users with direct online access to their EOS/CERNBox-powered user storage from Windows. In production for about 15 months, a High-Available Samba cluster is regularly used by a significant fraction of the CERN user base, following the migration of their central home folders from Microsoft DFS in the context of CERN’s strategy to move to open source solutions. We describe the configuration of the cluster, which is based on standard components: the EOS-backed CERNBox storage is mounted via FUSE, and an additional mount provided by CephFS is used to share the cluster’s state. Further, we describe some typical shortcomings of such a setup and how they were tackled. Finally, we show how such an additional access method fits in the bigger picture, where the storage is seamlessly accessed by user jobs, sync clients, FUSE/Samba mounts as well as the web UI, whilst aiming at a consistent view and user experience.
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Deng, Zhao Xue, and Ling Zheng. "Vibration Control and Design of Vehicle Engine Mount Activated by Magnetorheological Fluid." Advanced Engineering Forum 2-3 (December 2011): 1077–81. http://dx.doi.org/10.4028/www.scientific.net/aef.2-3.1077.
Повний текст джерелаАнотація:
Magneto-rheological (MR) fluid mount demonstrates excellent performance of vibration isolation in a wide frequency range and potential application in engineering. In this paper, a new mixed mode MR mount is proposed and an analytical model is established and used to predict the performance of MR mount. Meantime, a six degrees of freedom dynamic model of an in-line four-cylinder engine which has three points mounting system is derived by considering the dynamic behaviors of MR mount and its state space form is established. LQR and fuzzy-logic controllers are designed and synthesized to actively control the imposed vibration. The simulation results show that the proposed LQR or fuzzy-logic controllers can isolate the vibration of vehicle engine in a wide frequency range. The amplitudes can be suppressed well by employing this mount system. Its effectiveness will be verified via experiment in the second part of this work.
Дисертації з теми "Mount (Vic )"
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Satchwell, Steven Tanner. "Isolation of Temporary Storage in High Performance Computing via Linux Namespacing." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6873.
Повний текст джерелаАнотація:
Per job isolation of temporary file storage in High Performance Computing (HPC) environments provide benefits in security, efficiency, and administration. HPC system administrators can use the mount_isolation Slurm task plugin to improve security by isolating temporary files where no isolation previously existed. The mount_isolation plugin also increases efficiency by removing obsolete temporary files immediately after each job terminates. This frees valuable disk space in the HPC environment to be used by other jobs. These two improvements reduce the amount of work system administrators must expend to ensure temporary files are removed in a timely manner.Previous temporary file removal solutions were removal on reboot, manual removal, or removal through a Slurm epilog script. The epilog script was the most effective of these, allowing files to be removed in a timely manner. However, HPC users can have multiple supercomputing jobs running concurrently. Temporary files generated by these concurrent or overlapping jobs are only deleted by the epilog script when all jobs run by that user on the compute node have completed. Even though the user may have only one running job, the temporary directory may still contain temporary files from many previously executed jobs, taking up valuable temporary storage on the compute node. The mount_isolation plugin isolates these temporary files on a per job basis allowing prompt removal of obsolete files regardless of job overlap.
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Lessing, Robert Reed. "The holiness of Yahweh in conflict with the holiness of Baal vis-a-vis Mount Zion and Mount Zaphon." Theological Research Exchange Network (TREN), 1989. http://www.tren.com.
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Chaume, Bruno. "Le Mont Lassois dans son contexte régional : l'organisation du territoire autour d'un site princier." Dijon, 2000. http://www.theses.fr/2000DIJOL015.
Повний текст джерелаАнотація:
Cet ouvrage est consacré au complexe aristocratique de Vix/le mont Lassois et au territoire qu'il contrôlait. L'étude de ce site princier a été menée en faisant varier les échelles d'observations, de façon à élargir le cadre chronologique et spatial, d'abord en ce qui concerne le site et son proche environnement, puis à la région et, in fine, à l'ensemble de l'aire occidentale de la culture hallstattienne. La partie monographique est consacrée à la présentation critique des données des fouilles anciennes, concernant l'habitat et les nécropoles situées dans l'environnement, mais aussi à l'étude exhaustive du mobilier mis au jour depuis 1930. Le site est occupé dès le bronze final IIIB jusqu'au Ha D2-D3 avec une césure au Ha C. Apres une interruption au début de la Tène, l'occupation reprend à la Tène moyenne avec l'installation, sur le plateau supérieur, d'un oppidum défendu par un murus gallicus. La détermination de l'espace territorial contrôlé par la " résidence princière " de Vix impliquait qu'on fasse, en premier lieu, la synthèse des données chronologiques et spatiales concernant les ensembles funéraires du plateau Chatillonnais. La question centrale de notre problématique visait à replacer le complexe Vix/le mont Lassois dans l'espace culturel et social de la fin du premier âge du fer, marque par le phénomène des " résidences princières ". Les critères de définition d'une " résidence princière " ont été revus et nous en avons ajouté un, lié à l'emprise spatiale de ces souverainetés. Ces entités territoriales ne représenteraient que le niveau ultime de hiérarchisation d'un modèle base sur une organisation de type << place centrale >>. La modélisation du territoire que nous en déduisons est définie par trois sphères territoriales concentriques autour de la " résidence princière ". L'hypothèse, selon laquelle, l'émergence de ces résidences princières s'expliquerait par l'impact des cultures méditerranéennes sur les sociétés vernaculaires sort renforcée des conclusions auxquelles nous sommes parvenu.
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Ramírez, Flores Mauricio Andrés. "Susceptibilidad de cultivares de vid (Vitis vinifera L.) a Diplodia mutila (Fr.) Mont." Tesis, Universidad de Chile, 2014. http://repositorio.uchile.cl/handle/2250/148287.
Повний текст джерелаАнотація:
Memoria para optar al Título Profesional de Ingeniero AgrónomoLa frecuencia de síntomas debido al ataque de hongos de la madera de la vid, ha aumentado significativamente en todo el mundo durante la última década. Las especies fungosas de la familia Botryosphaeriaceae provocan la muerte parcial de la planta, disminuyendo la productividad y la rentabilidad del cultivo. Una de las especies presentes en Chile es Diplodia mutila, asociada principalmente a la enfermedad del brazo muerto de la vid. El objetivo de esta investigación fue evaluar la susceptibilidad de sarmientos de cultivares de vid vinífera (Cabernet Franc, Malbec, Merlot, Sauvignon Blanc y Syrah) y de mesa (Crimson Seedless, Flame Seedless, Red Globe y Thompson Seedless) a D. mutila. Para ello, se realizó un ensayo “in vivo” usando sarmientos de un año, los cuales fueron inoculados con discos de agar con micelio de D. mutila, en el sector medio del entrenudo después de producir una herida. Los sarmientos fueron mantenidos en una cámara de crecimiento durante cuatro a seis semanas, en oscuridad, a una humedad relativa del 95% y a una temperatura de 25°C. Se consideraron 10 repeticiones por cultivar y al término del período de incubación, se evaluó la longitud de la lesión necrótica en forma independiente, en los cultivares viníferos de los de mesa. No se encontraron diferencias estadísticamente significativas al comparar la susceptibilidad de los cultivares viníferos y de mesa investigados, los que en su totalidad fueron susceptibles al patógeno.
The frequency of symptoms associated to fungal attack on grapevine trunk, increased significantly worldwide during the last decade. Fungal species belonging to the Botryosphaeriaceae family are responsible for the death of part of the plant, reducing productivity and profitability of this crop. Diplodia mutila is one of the species associated to the dead arm disease of grapevine in Chile. The objective of this research was to evaluate the susceptibility of vine shoots of wine grape cultivars (Cabernet Franc, Malbec, Merlot, Sauvignon Blanc and Syrah) and table grapes (Crimson Seedless, Flame Seedless, Red Globe and Thompson Seedless) to D. mutila. In vivo trials were performed using one year old vine shoots, inoculated with mycelia disks of D. mutila between the internode after performing a wound. The shoots were kept during four to six weeks in a growth chamber, in the dark, at 95% relative humidity and at 25 ° C. Ten replicates per cultivar were considered, where necrotic lesion length was evaluated. No significant differences were observed on susceptibility among wine and table grape cultivars, being all susceptible to the pathogen.
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Denizeau, Laurent. "Le reste et la promesse : étude ethnographique d’une tradition monastique orthodoxe en France." Lyon 2, 2007. http://theses.univ-lyon2.fr/documents/lyon2/2007/denizeau_l.
Повний текст джерелаАнотація:
Lieu commun du religieux, la tradition façonne les relations que les acteurs entretiennent avec leur passé dans l’exercice actuel du vivre-ensemble. Le vivre-ensemble monastique, c’est d’abord une modalité d’être en commun qui puise dans les représentations de la tradition pour faire ressortir, au-delà des appartenances locales, un lien à même d’unir les acteurs aux générations passées pour former « l’Eglise ». Le monachisme abordé dans ce travail se définit en premier lieu par une localité, puisqu’il y est question d’une « tradition » située géographiquement : le Mont Athos en Grèce. Mais cette localité se trouve paradoxalement déterritorialisée : les acteurs que nous rencontrons s’inscrivent bien dans la tradition monastique du Mont Athos… mais en France. Dans un tel contexte, la tradition se trouve moins liée à une localité qu’à un réseau d’acteurs à même d’inscrire leurs engagements au sein d’une communauté élargie. Notre réflexion se concentre autour de l’usage de la notion de tradition dans les formes actuelles de construction du lien social dans le champ religieux. Cette notion nous conduit à envisager l’expérience religieuse comme une expérience de la présence de Dieu qui s’édifie au travers de l’expérience des autres, dans un jeu de médiation dont les modalités visent à re-présenter les absents et ce qu’ils ont à dire aux présentsUsual for monks, tradition shapes the relationship actors keep alive with their past through living together in the present. Monastic communal living is firstly a way of being together which draws from the representations of tradition which are then re-represented, beyond the local, a link that even unites actors from past generations to form the ‘Church’. Monkhood referred to in this work is defined firstly by a place, since it is a question of a ‘tradition’ situated geographically: Mount Athos in Greece. But this place is paradoxically deterritorialized: the actors that we will meet immerse themselves in the monastic tradition of Mount Athos… but in France. In such a context, tradition is connected less to a place than to a network of actors engaged in the heart of an enlarged community. Our reflection focuses on the practice of the notion of tradition in the present forms of constructing social links in the field of religion. This notion leads us to envisage religious experience as an experience of the presence of God which enlightens through the experience of others, in a game of mediation in which the modalities aim to re-represent those absent and what they have to say to those present
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Eden, Derek. "Forces and Pressures on Core-Loc Armour Units in Rubble Mound Breakwaters Measured via Instrumented “Smart-Units”." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39058.
Повний текст джерелаАнотація:
Today, more than forty percent of the world’s population lives within 100 kilometers of a coastal area, and population densities are only increasing. In recent years, extreme conditions have resulted in several failures of coastal protection structures around the world. During these failure events, the incurred cost of damages and loss of life has been nearly immeasurable.
Rubble mound breakwaters have been used for millennia, and are critical even today for the protection of coastal areas. In the last several decades, the popularity of using concrete armour units in place of natural rock has risen greatly. However, the quantitative interaction between wave hydrodynamics and the armour layer is still not clearly understood. Due to highly complex, turbulent flow patterns that occur in the armour layer, direct assessment of forces acting on individual units has not been practical. This has prevented the coastal engineering field from applying a force-balance design approach that is commonplace in other civil engineering disciplines. Instead, a wealth of experimental testing and past case studies have resulted in a wide array of empirical formulae and design techniques. These approaches are often very idealized and do not account for all parameters that have been shown to affect armour unit stability.
The current study aims to quantify the forces and pressures acting on units within an armour layer, using an experimental approach. This was achieved by developing an instrumented Core-Loc armour unit. This armour unit was outfitted with 6 pressure sensors, and the ability to be mounted on a force transducer. This unit was then put through a performance analysis and calibration procedure, before being extensively tested in a breakwater setting. Wide ranges of wave conditions were utilized, with the unit at three different locations along the breakwater slope. This was done to isolate both the effect of various sea state parameters, and the effect of unit location along a breakwater slope versus generated forces and pressures. In addition to the experimental study, an accompanying numerical study was performed in OpenFOAM. This had the intent of both developing general modeling rules of thumb for rubble mound breakwaters, and for replicating the experimental results.
The results showed that using relatively low-tech, low-cost, and widely available instrumentation was capable of performing in a coastal engineering setting. The performance of the unit showed great promise for “smart-units” to usher in a new paradigm of experimental testing for rubble mound breakwaters. From the results of the performance analysis and calibration procedure, it was evident that the unit could record forces and pressures to a high degree of accuracy. From the breakwater testing program, notable relationships between unit location, surf similarity, and wave steepness emerged. It appeared that the largest hydrodynamic interaction with units occurs slightly below the SWL. As well, both decreased surf similarity, and increased wave steepness resulted in higher hydrodynamic interaction for all locations. General rules of thumb for modeling armour units, as well as wave conditions in a breakwater setting were developed for the numerical study in OpenFOAM. Additionally, the calibrated numerical model was capable of reproducing the experimental results with reasonable accuracy.
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Olin, Max. "Förluster och stridsavstånd vid övningar för SIB." Thesis, Försvarshögskolan, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-9203.
Повний текст джерелаАнотація:
The significance of urban areas for military operations is increasing due to the proliferation of cities and the amount of people living in them; armed forces must, to a higher degree, fight in these urban areas in the future. This essay highlights that, despite the increasing importance of urban areas for armed forces, there is a lack of developed theory regarding how armed forces fight in urban areas and how tactics, techniques, and procedures result in casualties. Using previous research on urban warfare, this essay posits three hypotheses and applies these on exercises from the Swedish Armed Forces’ training area for military operations in urban terrain. The results show that mortars are responsible for a large number of the casualties incurred during the exercises. When exercises involve vehicles the combat ranges, at which casualties are suffered, are longer in comparison to exercises without vehicles. A small percentage of casualties are suffered in close-quarters combat. Finally, the essay elaborates on the meaning of the results and offer some possible explanations that also are suitable for further research. It concludes that further research is warranted, especially regarding close-quarters combat and the use of hand grenades.
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Boudart, Samuel. "Maîtrise de la robustesse de systèmes dynamiques non-linéaires vis-à-vis de paramètres imprécis : application à l'optimisation de suspensions GMP en phase d'avant-projet." Valenciennes, 2007. http://ged.univ-valenciennes.fr/nuxeo/site/esupversions/5577c28b-e664-4079-a2c2-c646c2e4bc11.
Повний текст джерелаАнотація:
En conception d’avant projet, les impératifs de rapidité et de réduction des coûts sont à l’origine du recours quasi-systématique aux techniques d’optimisation numérique. La conception la plus performante est ici l’objectif principal recherché. Depuis quelques années, les chercheurs et les industriels s’intéressent à des méthodes de simulation intégrant les imprécisions inhérentes à la réalisation des produits manufacturés. L’objectif est alors d’étudier la robustesse des solutions vis-à-vis de la variabilité des paramètres du modèle. Les produits n’étant jamais le reflet exact de la conception optimale retenue, il s’avère aujourd’hui essentiel de coupler ces deux approches pour répondre également aux exigences de qualité. Les travaux présentés dans ce mémoire concernent la définition d’une stratégie d’optimisation robuste répondant à des objectifs multiples et adaptée au dimensionnement dynamique de systèmes mécaniques en phase d’avant projet. La méthodologie proposée s’appuie sur des techniques d’optimisation éprouvées et intègre les imprécisions via des méthodes de réanalyse exploitant des développements en série. Le choix de ces deux approches est justifié par l’utilisation commune des techniques de sensibilité, permettant ainsi des gains de temps. La méthodologie a été appliquée au dimensionnement fonctionnel d’une suspension de groupe motopropulseur (GMP). Cet ensemble mécanique présente en effet des contraintes de dimensionnement multiples et antagonistes associées à des variabilités d’une partie de ses constituants. Sur ce cas industriel, la méthodologie a permis de déterminer et de valider des solutions nouvelles garantissant une stabilité des performancesIn preliminary projects, numerical optimization techniques allow to obtain efficient solutions rapidly and at lower cost. The aim of such tools is to search and obtain the best design. For a few years, methods of simulation integrating the inaccuracies inherent in the realization of the manufactured goods have been developed. The purpose is then to study the robustness of the solutions with respect to the variability of the parameters of the model. In order to improve the quality of the products it is now essential to take both efficiency and robustness into account. In this study we propose a new robust optimization strategy which allows to handle several objective functions for the improvement of dynamic behaviour of mechanical systems in the design step. The proposed methodology is based on multi-objective optimization method and takes parameters imprecision into account using second-order approximation. Coupling both those methods is justified by the common use of sensitivities. Then, an application on a powertrain mounting system has been performed using this tool. For this industrial test case, new robust and optimal designs have been obtained and validated
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Kim, Yang-Hee. "L'attitude esthétique des Coréens vis-à-vis de la montagne : la naissance du sentiment paysager de la montagne en Corée et le sublime du mont Kûmgang." Paris, EHESS, 2003. http://www.theses.fr/2003EHES0082.
Повний текст джерелаАнотація:
En Europe, Jean-Jacques Rousseau éprouva le sentiment paysager des Alpes en évoquant la forêt comme berceau de la civilisation européenne ; en Chine, Xie Lingyun exprima cette idée au cours de sa quête d'un cosmos esthétisé dans la forêt-montagne. En Corée, trois motivations principales aboutissent au sentiment paysager de la montagne : les enquêtes géographiques à travers la montagne comme source économique ; l'émergence d'un mont mythique au détriment de la tradition du "désert" bouddhique ; enfin l'agrément d'une vie cosmique et éthique à la campagne. Ces trois motivations permirent de redécouvrir le motif antique de la déesse du col, symbole de la montagne-matrice. Sur le col de la Mère Sainte (Söngmo), Kim Chong-jik fit du mont Chiri le berceau des 'sarim' intellectuels de Yôngnam. Son appréciation marque la véritable naissance d'un sentiment paysager de la montagne. En revanche, le sublime du mont Kûmgang est représentatif du goût esthétique du "désert" des CoréensIn Europe, Jean-Jacques Rousseau felt the Alps as a landscape as he depicted the forest as a cradle of the European civilisation. In China, Sie Lingyun showed a similar idea while he experienced an aesthetic cosmos in the forest-mountain. In Korea, three main motivations contributed to the birth of mountain as a landscape : the geographical researches of mountains s an economic source ; the reappearance of mythical mountain to the detriment of the tradition of Buddihist desert ; finally, the pleasure of cosmic and ethic life in the country. Three motivations lead to rediscover the ancient motif of the goddess of pass which symbolizes the mount-matrix. On the pass of the Holly Mother (Sôngmo), Kim Chong-jik felt the mount Chiri as a cradle of the intellectual 'sarim' of Yôngnam. His appreciation marks the true birth of mountain as a landscape. As for the sublime of the mount Kûmgang, it represents the Koreans' aesthetic taste for desert
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ABBAOUY, FAHEM AMAL. "La relation espace-personnages dans les romans de guy de maupassant : une vie, mont oriol et fort comme la mort." Paris 3, 1998. http://www.theses.fr/1998PA030077.
Повний текст джерелаАнотація:
La premiere partie de ce travail aborde la relation qui existe entre la representation spatiale de maupassant et son esthetique romanesque laquelle consiste a donner "l'illusion complete du vrai". Ainsi, en combinant reel referentiel et subjectivite artistique, maupassant cree un effet de vraisemblance a travers ses descriptions et notamment celles de la normandie, des espaces agrestes, de paris ou des espaces clos. La relation espace-personnages, dans les romans de maupassant, se caracterise par un phenomene de reciprocite, l'espace etant tantot destinateur, tantot destinataire de modalites par rapport a un systeme de personnages qui se divise en deux categories: les personnages du "faire" et ceux de "l'etre". La seconde partie de la these etudie la modalisation du personnage par l'espace. Cette modalisation, principalement fondee sur le theme de la perception, met en valeur le role actantiel de l'espace romanesque et sa fonctionnalite narrative dans le recit. Nous decouvrons ainsi, a travers des espaces privilegies, la suprematie des sens qui regit l'oeuvre du romancier et qui etablit un rapport de force entre l'espace, physique en particulier et le personnage dans sa manifestation corporelle. La troisieme partie de la these est consacree a la modalisation de l'espace par le personnage qui est alors delegue a la construction de son propre cadre. Cette construction est notamment assumee par le regard du protagoniste et soumise a ses differents prismes. La composante spatiale, chez maupassant, peut etre aussi concue par l'action du protagoniste qui, a travers les modalites du "faire", intervient sur l'espace figuratif du roman. En construisant l'espace que ce soit par son action ou par son regard, le personnage y depose les marques de son individualite. Ces dernieres, sous forme de notations spatiales, remplissent une fonction informative aupres du lecteur car elles constituent les qualifications indirectes du personnageTHE FIRST PART OF THIS WORK TACKLES THE RELATION BETWEEN MAUPASSANT'S SPACE REPRESENTATION AND HIS ART OF NOVEL WICH CONSISTS TO GIVING "THE COMPLETE ILLUSION OF THE TRUE". MAUPASSANT COMBINES A REFERENTIAL REALITY AND THE ARTISTIC SUBJECTIVITY TO CREATE THE IMPRESSION OF VERISIMILITUDE IN HIS DESCRIPTIONS LIKE NORMANDY, NATURAL SPACES, PARIS OR CLOSED SPACES. THE RELATIONSHIP BETWEEN SPACE AND CHARACTERS, IN MAUPASSANT'S NOVELS, IS MARKED BY A PHENOMENON OF RECIPROCITY. SPACE IS SOMETIMES TRANSMITTER AND OTHER TIMES RECEIVER OF MODALITIES IN RELATION TO A SYSTEM OF CHARACTERS WICH CONTAINS CHARACTERS OF "BEING" AND CHARACTERS OF "DOING". THE SECOND PART OF THE WORK STUDIES THE MODALISATION OF CHARACTERS BY THE SPACE. THIS MODALISATION, WICH IS FOUNDED ON THE PERCEPTION'S THEME, CONFIRMS THE ACTIVE ROLE OF THE NOVEL'S SPACE AND HIS RECOUNTING FUNCTION IN THE STORY. THEN, WE DISCOVER, THROUGH PRIVILEGIED SPACES, THE IMPORTANCE OF SENSES IN THE NOVELIST'S WORK AND IT ESTABLISHS THE RELATIONSHIP OF strength BETWEEN PHYSICAL SPACE AND THE CHARACTER. THE THIRD PART OF THE THESIS IS CONSECRATED TO THE MODALISATION OF THE SPACE BY CHARACTER WHO IS APPOINTED TO THE CONSTRUCTION OF HIS OWN SPACE. THIS CONSTRUCTION IS ASSUMED BY CHARACTER'S LOOK AND IS SUBMISSIVED TO HIS VARIOUS SIGHTS. THE NOVEL'S SPACE, FOR MAUPASSANT, CAN ALSO BE SUBMISSIVED TO CHARACTER'S ACTION WHO, THROUGH "DOING"'S MODALITIES, ACTS ON THE FIGURATIVE SPACE OF NOVEL. WHEN HE BUILDS SPACE, WITH HIS ACTION OR WITH HIS LOOK, THE CHARACTER LAYS THERE HIS INDIVIDUAL MARKS. THESE MARKS HAVE A ROLE OF INFORMATION NEXT TO THE READER, THEY'ARE INDIRECT QUALIFICATIONS OF THE CHARACTER
Книги з теми "Mount (Vic )"
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Dehoney, Wayne. The Sermon on the Mount. Southhaven, MS: The King's Press, 2000.
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2
Thomas, Watson. The saint's spiritual delight and a Christian on the mount. [Prescott, Ont.?: s.n.], 1986.
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3
Via Mound and Tollcross: Transport in Edinburgh 1854-2014. [Foulden, Berwickshire]: Brian Patton, 2014.
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Les oiseaux du mont Perdu. Toulouse: Milan, 1999.
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Poitevin, Jean-Louis. L' envers de la vie: Notes du mont Athos. [France]: Joseph K., 1995.
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The Sermon on the mount: Its Old Testament roots. New York: Paulist Press, 1997.
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7
What are they saying about Matthew's Sermon on the mount? New York: Paulist Press, 1994.
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Phillips, Ellen. The VII Olympiad: Antwerp 1920, Chamonix 1924. Los Angeles: World Sport Research & Publications, 1998.
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Richard, Pierre. Fort du Mont-Bart: 1873-1877 : la garnison, la vie dans le fort. [Bart]: P. Richard, 2000.
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Histoire religieuse du Mont-Saint-Michel. Rennes: Éd. "Ouest-France, 2009.
Знайти повний текст джерелаЧастини книг з теми "Mount (Vic )"
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Lee, Seong Beom, Heung Seob Kim, Shin Hur, Wan Doo Kim, Chang Su Woo, and Chan Seok Park. "A Viscoelastic Model for an Automotive Transmission Rubber Mount." In Fracture and Strength of Solids VI, 995–1000. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-989-x.995.
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Chan, Y. C., D. J. Xie, J. K. L. Lai, F. Yeung, and H. Wong. "Applications of X-Ray Radiography to the Study of Porosities in Surface Mount Solder Joints." In Nondestructive Characterization of Materials VI, 683–90. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2574-5_87.
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Elliot, David. "Hope in Theology." In Historical and Multidisciplinary Perspectives on Hope, 117–36. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46489-9_7.
Повний текст джерелаАнотація:
Abstract As social, civic, and global anxieties mount, the need to overcome despair has become urgent. This chapter draws on St. Thomas Aquinas and virtue ethics to propose the theological virtue of hope as a powerful source of rejuvenation. It argues for the necessary place of theology in reflection on hope due to the religious origins of hope as a central human aspiration and virtue capable of resilience. The virtue of hope, it is suggested, sustains us from the sloth and despair that threaten amid injustice, tragedy, and death; it provides an ultimate meaning and transcendent purpose to our lives; and it encourages us “on the way” (in via) with the prospect of eternal beatitude. Rather than degrading this life and world, hope ordains earthly goods to our eschatological end, forming us to pursue justice and social tasks with a resilience and vitality that transcend widespread cynicism and disillusionment. While hope ultimately seeks the kingdom of God, it can be concluded that it contributes richly to personal happiness and the common good, even in this life, and that this may be affirmed by those who do not share the theological premises.
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Bougy, Catherine. "Variations graphiques et particularités dialectales dans les deux manuscrits du Roman du Mont Saint-Michel de Guillaume de Saint-Pair (vers 1155)." In Français du Canada – Français de France VII, edited by Brigitte Horiot, 81–104. Berlin, New York: Walter de Gruyter – Max Niemeyer Verlag, 2008. http://dx.doi.org/10.1515/9783484970557.3.81.
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"CHAPTER VII. THE BRETHREN OF THE CONVENT." In Mount Sinai, 77–87. Piscataway, NJ, USA: Gorgias Press, 2010. http://dx.doi.org/10.31826/9781463218454-009.
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T., Pasquay, and Müller H.F.O. "Academy Mont-Cenis." In World Renewable Energy Congress VI, 694–97. Elsevier, 2000. http://dx.doi.org/10.1016/b978-008043865-8/50140-9.
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"Image, Text, Life: La Vie de Saint Gilles and Charlemagne." In "Moult a sans et vallour", 335–53. Brill | Rodopi, 2012. http://dx.doi.org/10.1163/9789401208154_024.
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Hill, Selena, Christopher Barr, Maggie Killington, James McLoughlin, Rory Daniels, and Maayken van den Berg. "The Design and Development of MOVE-IT: A System for Remote Vestibular and Oculomotor Assessment in People with Concussion." In Studies in Health Technology and Informatics. IOS Press, 2021. http://dx.doi.org/10.3233/shti210025.
Повний текст джерелаАнотація:
Background: Dizziness is one of the most common symptoms following concussion and requires a thorough vestibular assessment. However, due to limited tools and evidence on remote vestibular assessment and intervention, people unable to attend in-person consults cannot receive effective care. Objective: This study aims to describe the design and development process of MOVE-IT. MOVE-IT is a mobile phone application with an associated head mount device and clinician dashboard which aims to enhance vestibular assessments and intervention via telehealth by enabling clinicians to clearly observe client’s eye movements. Methods: This study used a Living Labs methodology including the use of a scoping review, user engagement, multi stakeholder engagement, real-life settings, and co-creation. MOVE-IT was developed in three phases: Exploration, Experimentation and Evaluation. This paper describes the Exploration and Experimentation process. Exploration included a scoping review, focus group and consultation interviews. Experimentation included the co-creation of a minimum viable product in a real-life setting with regular feedback from multi-stakeholders. Outcome: MOVE-IT includes three components: a mobile phone application, head mount device and clinician dashboard. MOVE-IT aims to enhance the use of telehealth for vestibular assessments by: (1) using the head mount device to enable video recording of client’s eyes during assessment, (2) allowing clinicians to view client’s eye movements via the clinician dashboard whilst (3) a support person assists in the physical aspect of the vestibular assessment by a step-by-step guided video in the mobile application. Conclusion: The Living Lab method was a useful strategy for developing MOVE-IT. MOVE-IT meets all predefined functionality requirements and potentially provides a solution for remote vestibular assessment and intervention in the concussion population. The Evaluation phase will be conducted next to test usability, reliability and validity of MOVE-IT.
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JEON, Y. S., Y. T. CHOI, S. B. CHOI, and C. C. CHEONG. "PERFORMANCE EVALUATION OF A MIXED MODE ER ENGINE MOUNT VIA HILS." In Electro-Rheological Fluids And Magneto-Rheological Suspensions, 812–20. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793607_0094.
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Goldmann, Lukas, Rainer Komp, and Friedrich Lüth. "The large scale geomagnetic survey at Mont Lassois (2013-2017)." In Vix et le phénomène princier, 39–58. Ausonius Éditions, 2021. http://dx.doi.org/10.46608/dana5.9782356133823.4.
Повний текст джерелаТези доповідей конференцій з теми "Mount (Vic )"
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Su, J. Hannsen. "Simulation-Based Design of Hybrid Vibration Mounts." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21495.
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Abstract The simulation-based design (SBD) in this paper is a methodology that integrates and streamlines the design and analysis processes for engineering products. Its methodology is presented by starting from the method development to some specific designs of different hybrid vibration mounts. In particular, two hybrid mount designs such as the “Passive-Active Extensional” mounts, incorporating an extensional active component between a conventional mount and the jointed structure, and the “Passive-Active” mounts, adding inertial actuators to the attachment plate of a conventional mount, are considered in a realistic example to illustrate the application of SBD. It is demonstrated that the functionality and feasibility of many design alternatives and concepts can be realized by this methodology. Each design and evaluation time takes only a few minutes when this methodology is implemented in engineering software. Therefore, more optimal designs can be achieved in less time and at lower cost.
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Su, J. Hannsen. "Robust Passive-Active Mounts for Machinery and Equipment." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-3774.
Повний текст джерелаАнотація:
Abstract Conventional vibration isolation mounts are not as effective as expected on a practical foundation whose resonant frequencies normally are within the bandwidth of interest. In addition, the low frequency enhancement is a characteristic of the passive mounts. Applying inertia actuators to the bottom attachment plate of the conventional mounts overcomes these shortcomings and enhances their performance significantly. This design concept has universal application since it is applicable to any dynamic system. It requires very little power and force capacity, i.e., a small percentage of the disturbance force, from the actuators to be effective for frequencies higher than the resonant frequency of the mount itself. The effectiveness of the proposed mounts for the machinery is demonstrated on the load transmissibility reduction at the foundation support (fixed end) due to disturbance from machinery above mounts. On the other hand, the vibration magnitude reduction of equipment above mounts due to disturbance from the foundation is used for evaluating the equipment isolation effectiveness. There is no stabilty or degradation problem when a number of the passive-active mounts are used on the same foundation. Furthermore, the more of this type of mounts used on a foundation the more effective the vibration suppression and the smaller actuator force requirement for each passive-active mount.
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Sun, Lingling, and Kongjie Song. "Power Flow Analysis for Complicated System." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/vib-48556.
Повний текст джерелаАнотація:
The generalized theoretical models for vibrating machines isolated by multiple elastic mounts or by a mount-raft-mount system from non-rigid foundation were proposed. The structural analysis method was developed based on the power flow control perspectives. The dynamic transmission equations were derived to predict the power flow characteristics between subsystems. Numerical calculations of power flow for practical isolation systems were carried out to explore the interaction between the mounting frequency and the flexibility of supporting structure. The effects of mounting frequency on the power transmitted to the foundation were discussed. It is shown that the power flow can be reduced effectively by reasonable choice of mounting frequency.
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Jazar, G. Nakhaie, M. F. Golnaraghi, and D. A. Swanson. "Steady State Vibrations of a Piecewise Linear System." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21443.
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Abstract In this paper we examine the dynamics of a mechanical system with a piecewise linear damping and stiffness, which is characterized as a strongly nonlinear system. Searching for the exact steady state periodic response of piecewise linear systems for harmonic excitations, lead to a set of transcendental equations which should be solved numerically. The strong nonlinear characteristic of the system is the reason for failure of most traditional perturbation methods in providing an approximated frequency response. In this paper we show that the averaging method of Krylov-Bogoliobuv-Mitropolsky (or multiple time scale method) may be used to find the behavior of this type of system. Optimization of linear vibration isolators and engine mounts has a straightforward solution: the stiffness should be as soft as possible. Static deflection and maximum allowable relative mount displacement (rattle space) determine the limit of mount softness. Dividing the travel space into two (or more) stages enables us to use an isolator with a different stiffness for each stage. This is a simple method to have a more advanced passive mount isolator. However, this also makes the system piecewise linear, which has a strongly nonlinear behavior if the ratio of the two stages are far from unity. Asymmetrical bilinear systems, with different stiffness and damping values for compression and tension, are used when the relative motion in negative direction is more (or less) critical than in positive direction. Sensitivity analysis of the system shows that the difference in the damping plays a more important role than the stiffness difference in these systems. In this paper, using averaging method, we examine the nonlinear behavior of piecewise linear mounts at resonance, and provide a comprehensive analysis which may be used to better design for these kind of vibration isolators.
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Kashani, Reza, and Kazim Mirza. "Tuned Damping of an Air-Mounted Isolation System." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60852.
Повний текст джерелаАнотація:
Air mounts can provide the highest degree of isolation of any type vibration isolator. Soft-mounting, and thus high level of low-frequency isolation, with system natural frequency as low as 1 Hz can be achieved. Due to their construction, air mounts have negligible damping. Although, this almost undamped nature of air mounts enhances the high-frequency isolation, provisions should be made to address the lack of isolation resulting in excessive body displacements around the resonant frequencies, especially when the system is exposed to shock inputs. While the addition of viscous damping to the air mount is proposed in the literature but it is not recommended in most applications. This is because it deteriorates the mount’s high-frequency isolation performance. Instead, it would be highly desirable to add tuned damping to the mounted system at its resonant frequency (ies). The challenge in doing so, is realizing a damper tunable to a very low frequency and yet not be prohibitively large. A novel tuned damping mechanism is proposed in this paper. It adds damping to an air mount only at the resonant frequency (ies), via a bi-fluid Helmholtz resonator. In an illustrative example the mechanics and mathematics (modeling) of a one and three degree of freedom air mounted systems equipped with a tuned damper, as well as the tuning of such damper are discussed. The example also demonstrates the effectiveness of the air mount with the tuned damper.
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Christopherson, J., G. Nakhaie Jazar, and M. Mahinfalah. "Chaotic Behavior of Hydraulic Engine Mount." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13744.
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The constitutive relationships of the rubber materials that act as the main spring of a hydraulic mount are nonlinear. In addition to material induced nonlinearity, further nonlinearities may be introduced by mount geometry, turbulent fluid behavior, boundary conditions, temperature, decoupler action, and hysteretic behavior. While all influence the behavior of the system only certain aspects are realistically considered using the lumped parameter approach employed in this research. The nonlinearities that are readily modeled by the lumped parameter approach constitute the geometry and constitutive relationship induced nonlinearity, including hysteretic behavior, noting that these properties all make an appearance in the load-deflection relationship for the mount and may be readily determined via experiment or flnite element analysis. In this paper we will shoe that under certain conditions, the nonlinearities involved in the hydraulic engine mounts can show a chaotic response.
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Alkhatib, Rabih, and Farid Golnaraghi. "Modeling and Stability Analysis of Turboprop Engine Installations." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21395.
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Abstract In this paper a simple formulation of dynamic model of a turboprop installations has been presented incorporating aerodynamic forces. A four-bladed propeller-engine is simplified to have six rigid-body degrees of freedom. The engine is connected to the nacelle through resilient elements in order to reduce vibration transmission from the engine to the airplane structure. The aerodynamic forces acting on the propeller are modeled utilizing quasi-steady airfoil theory by considering their effect as reaction forces. Using the formulated dynamic model, an analysis of the stability of the engine-mount is conducted by deriving a second order eigenvalue problem. The system natural frequencies are found to be dependent on the rotational speed. At lower speeds, the aerodynamic forces have a stabilizing effect on the system. At higher rotational frequencies, the engine reaches a speed after which the system becomes unstable. The use of soft resilient mounts maximizes the vibration isolation but lowers instability threshold speed.
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Ivarsson, Lars. "Transfer Path Analysis of a Vehicle Subframe: Measurements in Six Degrees of Freedom." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-4248.
Повний текст джерелаАнотація:
Abstract A Transfer path analysis (TPA) is undertaken for a car subframe concerning six DOF of freedom and two coupling points up to 500 Hz. Integrated stingers have been developed to improve measurement results. The relative importance of the rotational components is investigated. The blocked impedance method has been used to couple the subframe to the car body using measured mobilities via two isolators out of four. The sound sensitivity is measured directly for the coupled system and compared with the total sum of the calculated transfer path components which are calculated with measured mobilities and transfer functions. Calculated and measured results show good agreement. The importance of the rotational paths depends on the characteristics of the isolator and the structures where it is mounted. It was found that the front mount position is more sensitive to rotations compared to the rear mount position. The rear mount position is also a much stiffer construction. It was found that above 220 Hz, the rotational paths are of the same importance as the translational paths when both points were connected to the body frame. It was also found that for the rear mount position, only one translational transfer path dominates. These conclusions do not differ especially for different excitation directions at the engine mount position.
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Sciulli, Dino, and Daniel J. Inman. "Active Isolation Design for a Flexible Base." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-4117.
Повний текст джерелаАнотація:
Abstract It has been commonly assumed that the corner or mount frequency in an isolator should be designed as low as possible. This is one result of using a single-degree-of-freedom (SDOF) system to model isolation systems. However, for systems that have flexible or nonrigid foundations, a design point for the mount frequency can occur between the modes of the base. By implementing this type of design, a strong interaction will exist between the modes. When isolator damping is included, whether done passively or actively, more than one mode can be attenuated for this new mount design. Therefore, the effects of the mount frequency on isolation designs are discussed as well as using both passive and active damping in the isolator. For active damping, three commonly used control methodologies are discussed: a proportional-plus-integral-plus-derivative (PID) controller, a positive position feedback (PPF) controller, and a linear quadratic Gaussian (LQG) regulator.
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Murga Llano, Gaizka, Kei Szeto, Rafael Urrutia, Steven E. Bauman, Armando Bilbao, Thomas E. Lorentz, and Richard Murowinski. "The Maunakea Spectroscopic Explorer (MSE) telescope mount." In Ground-based and Airborne Telescopes VII, edited by Roberto Gilmozzi, Heather K. Marshall, and Jason Spyromilio. SPIE, 2018. http://dx.doi.org/10.1117/12.2313157.
Повний текст джерелаЗвіти організацій з теми "Mount (Vic )"
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Mueller, C., S. J. Piercey, M. G. Babechuk, and D. Copeland. Stratigraphy and lithogeochemistry of rocks from the Nugget Pond Deposit area, Baie Verte Peninsula, Newfoundland. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328989.
Повний текст джерелаАнотація:
Stratigraphic and lithogeochemical data were collected from selected drill core from the Nugget Pond gold deposit in the Betts Cove area, Newfoundland. The stratigraphy consists of a lower unit of basaltic rocks that are massive to pillowed (Mount Misery Formation). This is overlain by sedimentary rocks of the Scrape Point Formation that consist of lower unit of turbiditic siltstone and hematitic cherts/iron formations (the Nugget Pond member); the unit locally has a volcaniclastic rich-unit at its base and grades upwards into finer grained volcaniclastic/turbiditic rocks. This is capped by basaltic rocks of the Scrape Point Formation that contain pillowed and massive mafic flows that are distinctively plagioclase porphyritic to glomeroporphyritic. The mafic rocks of the Mount Misery Formation have island arc tholeiitic affinities, whereas Scrape Point Formation mafic rocks have normal mid-ocean ridge (N-MORB) to backarc basin basalt (BABB) affinities. One sample of the latter formation has a calc-alkalic affinity. All of these geochemical features are consistent with results and conclusions from previous workers in the area. Clastic sedimentary rocks and Fe-rich sedimentary rocks of the Scrape Point Formation have features consistent with derivation from local, juvenile sources (i.e., intra-basinal mafic rocks). The Scrape Point Formation sedimentary rocks with the highest Fe/Al ratios, inferred to have greatest amount of hydrothermally derived Fe, have positive Ce anomalies on Post-Archean Australian Shale (PAAS)-normalized trace element plots. These features are consistent with having formed via hydrothermal venting into an anoxic/ sub-oxic water column. Further work is needed to test whether these redox features are a localized feature (i.e., restricted basin) or a widespread feature of the late Cambrian-early Ordovician Iapetus Ocean, as well as to delineate the role that these Fe-rich sedimentary rocks have played in the localization of gold mineralization within the Nugget Pond deposit.
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Olchowski, Frederick M., Christopher M. Stellman, and Joseph V. Michalowicz. Summer 1999 Mount Weather/Aberdeen Proving Grounds Field Test Report: Real-Time Detection of Military Ground Targets Using a VIS/NIR Hyperspectral Sensor. Fort Belvoir, VA: Defense Technical Information Center, November 2000. http://dx.doi.org/10.21236/ada384852.
Повний текст джерела
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de Caritat, Patrice, Brent McInnes, and Stephen Rowins. Towards a heavy mineral map of the Australian continent: a feasibility study. Geoscience Australia, 2020. http://dx.doi.org/10.11636/record.2020.031.
Повний текст джерелаАнотація:
Heavy minerals (HMs) are minerals with a specific gravity greater than 2.9 g/cm3. They are commonly highly resistant to physical and chemical weathering, and therefore persist in sediments as lasting indicators of the (former) presence of the rocks they formed in. The presence/absence of certain HMs, their associations with other HMs, their concentration levels, and the geochemical patterns they form in maps or 3D models can be indicative of geological processes that contributed to their formation. Furthermore trace element and isotopic analyses of HMs have been used to vector to mineralisation or constrain timing of geological processes. The positive role of HMs in mineral exploration is well established in other countries, but comparatively little understood in Australia. Here we present the results of a pilot project that was designed to establish, test and assess a workflow to produce a HM map (or atlas of maps) and dataset for Australia. This would represent a critical step in the ability to detect anomalous HM patterns as it would establish the background HM characteristics (i.e., unrelated to mineralisation). Further the extremely rich dataset produced would be a valuable input into any future machine learning/big data-based prospectivity analysis. The pilot project consisted in selecting ten sites from the National Geochemical Survey of Australia (NGSA) and separating and analysing the HM contents from the 75-430 µm grain-size fraction of the top (0-10 cm depth) sediment samples. A workflow was established and tested based on the density separation of the HM-rich phase by combining a shake table and the use of dense liquids. The automated mineralogy quantification was performed on a TESCAN® Integrated Mineral Analyser (TIMA) that identified and mapped thousands of grains in a matter of minutes for each sample. The results indicated that: (1) the NGSA samples are appropriate for HM analysis; (2) over 40 HMs were effectively identified and quantified using TIMA automated quantitative mineralogy; (3) the resultant HMs’ mineralogy is consistent with the samples’ bulk geochemistry and regional geological setting; and (4) the HM makeup of the NGSA samples varied across the country, as shown by the mineral mounts and preliminary maps. Based on these observations, HM mapping of the continent using NGSA samples will likely result in coherent and interpretable geological patterns relating to bedrock lithology, metamorphic grade, degree of alteration and mineralisation. It could assist in geological investigations especially where outcrop is minimal, challenging to correctly attribute due to extensive weathering, or simply difficult to access. It is believed that a continental-scale HM atlas for Australia could assist in derisking mineral exploration and lead to investment, e.g., via tenement uptake, exploration, discovery and ultimately exploitation. As some HMs are hosts for technology critical elements such as rare earth elements, their systematic and internally consistent quantification and mapping could lead to resource discovery essential for a more sustainable, lower-carbon economy.