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Littérature scientifique sur le sujet « Marginal seal »

Auteur : Grafiati
Publié le 14 mars 2023

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Articles de revues sur le sujet "Marginal seal"

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Josipovic, Renata, Irena Kuzmanovic-Radman, Ognjenka Jankovic, Aleksandra Djeri et Natasa Knezevic. « Marginal seal of direct composite veneers ». Serbian Dental Journal 61, no 4 (2014) : 183–89. http://dx.doi.org/10.2298/sgs1404183j.

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Introduction. Advance in new nano-composite materials and adhesive systems has provided stronger bond with hard dental tissue as well as possibility for minimal cavity preparation. The aim of this study was to evaluate, using dye method, marginal seal of direct composite veneers placed on intact and abraded anterior teeth and polymerized with classical and soft start light curing technique. Material and Methods. The study was conducted on 40 extracted human anterior teeth. They were extracted for periodontal reasons and divided into two groups: intact teeth (20) and abraded teeth (20). 10 teeth in each group were polymerized with classical and soft start technique. Dye penetration was measured using stereo loupes with micrometer scale and six times magnification. Results. Linear dye penetration on the gingival wall when direct composite veneers were placed in intact teeth and polymerized with classical technique was 2.50 ?m, while on the incisal wall it was 0.5 ?m. Linear dye penetration on the gingival wall in intact teeth polymerized with soft start technique was 2.25 ?m, while on the incisal wall it was 2.0 ?m. Average dye penetration of direct composite veneers in abraded teeth polymerized with classical technique on the gingival wall was 3.0 ?m while on the incisal wall it was 1.25 ?m. Linear dye penetration in abraded teeth polymerized with soft start technique was greater on the gingival wall (3.50 ?m) than on the incisal wall (3.25 ?m). Conclusion. Smaller microcrack was observed on the incisal wall than on the gingival wall in all teeth regardless of the technique of polymerization used. The least dye penetration was observed in the group of intact teeth polymerized with classical technique of polymerization.
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Ribic, C. A., D. G. Ainley et W. R. Fraser. « Habitat selection by marine mammals in the marginal ice zone ». Antarctic Science 3, no 2 (juin 1991) : 181–86. http://dx.doi.org/10.1017/s0954102091000214.

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As part of the multi-disciplinary project, Antarctic Marine Ecosystem Research at the Ice Edge Zone (AMERIEZ), habitat selection by marine mammals was investigated within the marginal ice zone in relation to measured ice variables and other environmental factors. Data were collected on three cruises to the southern Scotia and northern Weddell seas during spring 1983, autumn 1986, and winter 1988. During winter, Antarctic fur seals were significantly associated with drift, pancake, brash ice, icebergs, and areas of uneven floe distribution, all characteristic of the marginal ice zone. Fur seals were seen in open water close to the ice edge during autumn, but during spring, as the pack ice began to retreat rapidly, animals were seen more often away from the ice. Minke whales were also associated with pancake and new ice but were seen further into the pack ice during both winter and autumn. The largest groups of minke whales during winter were observed with a large krill swarm in new ice. Crabeater seal was exclusively a species of the deep pack ice during all seasons and was associated with ice cover of 7–8 oktas and evenly distributed ice floes.
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SHAH, NEIL N., PAUL K. ROONEY, AYHAN OZGULER, SCOTT A. MORRIS et WILLIAM D. O'BRIEN. « A Real-Time Approach To Detect Seal Defects in Food Packages Using Ultrasonic Imaging ». Journal of Food Protection 64, no 9 (1 septembre 2001) : 1392–98. http://dx.doi.org/10.4315/0362-028x-64.9.1392.

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The microbial integrity of many types of flexible food packages depends on a zero defect level in the fused seam seal. Human inspection for defects in these seals is marginal at best, and secondary incubation protocols are often used to spot packages with compromised integrity before releasing product for sale. A new type of inspection method has been developed and is being evaluated for robustness. The purpose of the study was to evaluate a new raster scanning geometry to simulate continuous motion, online ultrasonic inspection of the seal region in flexible food package seals. A principal engineering tradeoff of scanning inspection systems is between increased line speed that results from decreased spatial sampling (less acquired data to process) and decreased image quality. The previously developed pulse-echo Backscattered Amplitude Integral (BAI) mode imaging technique is used to form ultrasound images using the new scanning geometry. At an ultrasonic frequency of 22.9 MHz, 38- and 50-μm-diameter air-filled channel defects in all-plastic transparent trilaminate are evaluated. The contrast-to-noise ratio (CNR) of the processed BAI-mode image is used to quantify image quality as a function of spatial sampling. Results show seal defects (38- and 50-μm diameter) are still detectable for undersampled conditions, although image quality degrades as spatial sampling decreases. Further, it is concluded that the raster scanning geometry is feasible for online inspection.
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Vuckovic, Vesna, Ankica Jakovljevic et Vladimir Ivanovic. « Marginal seal evaluation of adhesive amalgam restaurations ». Serbian Dental Journal 51, no 4 (2004) : 194–202. http://dx.doi.org/10.2298/sgs0404194v.

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Dental amalgam is still the material most commonly used to restore posterior teeth in many countries. Amalgam is very popular because of its strength, longevity, low cost, and relative ease of handling compared to other direct restorative materials. Two important disadvantages of amalgam restaurations are lack of adhesion to tooth structure and marginal leakage. Introduction of dentin adhesive systems enabled better marginal seal between amalgam and tooth structure. Aim: The aim of this study was to estimate, in vitro conditions, the marginal seal of amalgam restaurations with dentin adhesive systems using the method of diffusion dye. Material and methods: In this study 50 extracted human teeth were used. Class II cavities were prepared on all the teeth. The teeth were divided in five groups and materials applied according to manufacturer?s instructions: Gamabond, Optibond Solo, OptiGuard, Ionosit - Base Liner and control group. All the teeth were thermocycled 200 times, at temperatures: 5 - 7?C, 37?C and 57 - 59?C. Method of diffusion dye was used to estimate the quality of marginal seal of amalgam restaurations. All teeth were immersed into 50% solution of silver nitrate, and then into 10% developing solution. All teeth were cut with a diamond disc in the meso - distal plane. Penetration dye was estimated using binocular magnifying glass that magnifies 25 times, with inserted micrometar scale. Results were statistically analysed with Student t - test. Results: The least penetration dye was recorded in the group of amalgam restaurations rebonded with OptiGuard. Higher penetration dye was noted in the groups of adhesive amalgam restaurations, where Gamabond showed lower penetration dye in comparison with Optibond Solo. Penetration dye in the group Ionosit - Base Liner was higher than in the groups where dentin adhesive systems were used: on the occlusal wall, penetration dye in comparison with Gamabond showed statistically significant difference, (p < 0,5) while penetration dye in comparison with Optibond Solo showed no statistically significant difference. On the gingival wall, penetration dye in comparison with dentin adhesive systems - Gamabond and Optibond Solo, showed a statistically significant difference, (p < 0,01). The highest penetration dye was in the control group. Conclusion: The best marginal seal of amalgam restaurations was achieved with OptiGuard. Use of dentin adhesive systems also provided good marginal seal, with better results from Gamabond compared to Optibond Solo. Using Ionosit - Base Liner good marginal seal on the occlusal wall was also accomplished, while penetration dye on the gingival wall showed a statistically significant difference in comparison with adhesive and rebonding amalgam restaurations.
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Morales-Quiroga, Elisa, Alan Martínez-Zumarán, Juan Francisco Hernández-Sierra et Amaury Pozos-Guillén. « Evaluation of Marginal Seal and Microleakage of a Sealant Modified with Silver Nanoparticles in Primary Molars : In Vitro Study ». Odovtos - International Journal of Dental Sciences, no 16 (15 juillet 2015) : 107. http://dx.doi.org/10.15517/ijds.v0i16.20329.

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<p><span>The objective of this study was to evaluate the marginal seal effectiveness and microleakage of a pit and fissure sealant containing silver nanoparticles (AgNPs). An experimental in vitro study was carried out using 40 extracted temporary molars without caries or incipient caries. These molars were divided into two groups: Group A (20 molars), to which a silver nanoparticle-containing sealant was applied, and Group B (20 molars), to which a conventional sealant was applied. The marginal seal and microleakage were evaluated. No significant differences in the marginal seal or microleakage were noted between the silver nanoparticle-containing sealant and the conventional sealant.The addition of AgNPs does not alter the adhesion or resistance of the sealant. </span></p>
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Chan, Kai Chiu, et Edward J. Swift. « Marginal seal of new-generation dental bonding agents ». Journal of Prosthetic Dentistry 72, no 4 (octobre 1994) : 420–23. http://dx.doi.org/10.1016/0022-3913(94)90563-0.

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Tantray, MohammadAltaf. « MARGINAL SEAL IMPROVING TECHNIQUE IN ALL CERAMIC CROWNS. » International Journal of Advanced Research 7, no 5 (31 mai 2019) : 1–3. http://dx.doi.org/10.21474/ijar01/8997.

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Baimukanov, Мirgaliy Тuleugaliyevich, Аkzhan Аyazuly Iskakov, Zhazira Aybekkyzy Sydykova, Тimur Тuleugaliyevich Baimukanov et Аssel Mirgaliyevna Baimukanova. « On determining the width of the accounting strip during ship route accounting of the Caspian seal (Pusa caspica) in shallow water ». Bulletin of the Karaganda University. “Biology, medicine, geography Series” 108, no 4 (30 décembre 2022) : 14–21. http://dx.doi.org/10.31489/2022bmg4/14-21.

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In this work, an experimental method for estimating the number of Caspian seals in the sea was tested. The goals were set to determine the distance of visual detection of the Caspian seal in the sea from a small vessel, and to improve the methodology of ship accounting of seals in the Caspian Sea. Ship accounting is used to account for the relative abundance, occurrence and distribution of marine mammals, and the data obtained can also be used as an indicator of accumulations of fish objects, and in general it can indicate the state of the environment. During the period of the vessel’s movement, the length (km) of each daily route is determined, the number of seal encounters on this segment, the distance from the seal to the ship’s line of movement is visually determined. The effective width of the accounting strip and the density (individuals/km2) in this section of the sea area are calculated. However, in practice, it is difficult to determine the distance to the observed seal when traveling on a small vessel. It is recommended to conduct a route ship registration of seals in shallow water on flat-bottomed boats-budaras. As a result of conducting an experiment in the shallow waters of the Caspian Sea on the visibility of objects imitating the trunk and head of a Caspian seal, it was found that the optimal perpendicular distance from the axis of the accounting route or the optimal width of accounting from one side is 300 m, similarly, the maximum width of accounting is 550 m. The use of the concepts of optimal and marginal accounting band serves as a method for determining the distance when accounting for seals in the sea and, in the future, for calculating the effective accounting band.
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Schenke, F., K.-A. Hiller, G. Schmalz et M. Federlin. « Marginal Integrity of Partial Ceramic Crowns Within Dentin With Different Luting Techniques and Materials ». Operative Dentistry 33, no 5 (1 janvier 2008) : 516–25. http://dx.doi.org/10.2341/07-131.

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Clinical Relevance Resin coating improves the marginal seal of partial ceramic crowns to dentin compared to conventional luting, especially at the dentin/composite interface. However, the self-adhesive material RelyX Unicem shows significantly better marginal integrity than the other materials tested.
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Jankovic, Ognjenka, Kuzmanovic Radman, Tijana Adamovic, Sanja Ilic, Aleksandra Djeri et Renata Josipovic. « Marginal seal evaluation of self-etch flowable composite materials ». Serbian Dental Journal 60, no 4 (2013) : 200–209. http://dx.doi.org/10.2298/sgs1304200j.

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Introduction. The biggest drawback of composite materials is polymerization contraction and the existence of microcracks, therefore the market is now offering a wide variety of new composite materials. The aim of this study was to evaluate the marginal seal using dye method of class V cavities restored with self-etching flowable composite material Vertise Flow polymerized with different light-curing techniques. Material and Methods. The study was conducted on 60 extracted intact human teeth (30 premolars, 30 molars). Two cavities Class V (3?2?2 mm) were prepared in all teeth. Cavities on buccal surfaces were filled with self-etching flowable composite Vertise Flow (Kerr Dental Products), and on lingual with flowable composite Tetric Flow (Ivoclar Vivadent) using the corresponding adhesive systems. Polymerisation was performed using Bluephase Led flashlight C8 (Ivoclar Vivadent). Microleakage was tested using dye in a silver nitrate solution. Dye penetration was measured using stereo loupes with micrometer scale and six times magnification. Results. Linear dye penetration in intact molars restored using the classical polymerization technique and Vertise Flow composite was 3.41 ?m while with Tetric Flow it was 4.23 ?m. In intact molars restored using soft-start polymerization technique and Vertise Flow the dye penetration was 1.25 ?m while for Tetric Flow it was 4.23 ?m. Mean dye penetration in intact molars restored using pulse curing technique and material Vertise Flow was 1.02 ?m while for the composite Tetric Flow it was 4.35 ?m. In intact premolars restored using conventional curing technique and Vertise Flow dye penetration was 1.14 ?m while for Tetric Flow it was 3.90 ?m. Dye penetration in intact premolars restored using soft-start polymerization technique and Vertise Flow was 0.75 ?m while for Tetric Flow it was 3.15 ?m. Using a pulse polymerization technique and Vertise Flow in intact premolars dye penetration was 1.45 ?m while for Tetric Flow it was 3.76 ?m. Conclusion. Vertise Flow, self-etching flowable composite showed better marginal seal than flowable composite resin Tetric Flow. Smaller microcracks with Vertise Flow were confirmed after applying all three light-curing polymerization techniques.
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Thèses sur le sujet "Marginal seal"

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Kingsford, Smith E. D. « Marginal Seal Of Cervical Restorations ». Thesis, The University of Sydney, 1988. http://hdl.handle.net/2123/5099.

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Serhat, Koken. « Clinical and laboratory investigations on cervical margin relocation ». Doctoral thesis, Università di Siena, 2020. http://hdl.handle.net/11365/1096029.

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In the presence of subgingival proximal margins, close to or below the cemento-enamel junction (CEJ), impression taking and adhesive luting procedures for indirect restorations are hampered; surgical crown lengthening or orthodontic eruption are viable options. However, the placement of a small amount of composite, so-called cervical margin relocation (CMR), was proposed as an alternative technique. To date, literature about CMR is scarce and the aim of this PhD thesis was to perform laboratory and clinical investigations to shed light on some crucial missing points. The thesis consists of 5 studies. The first study is a literature review summarizing the existing scientific literature on CMR technique performed prior to the adhesive cementation of indirect restorations. The second study is an in vivo randomized controlled clinical trial assessing the possible influence of CMR on periodontal health, after 12- month of clinical service. The third study is an in vitro study evaluating the marginal sealing of relocated mesio-occluso-distal overlays. The fourth study is an in vitro study analyzing the influence of cervical margin relocation and adhesive system on microleakage of indirect composite restorations. The fifth study is an in vitro study evaluating the possible correlation between two methodological approaches applied to evaluate cervical margin relocation. Different methodological approaches were used to perform the above-reported investigations, such as scanning electron microscopy (SEM) and microleakage analyses. The principal investigator was calibrated and trained before performing the operative procedures and laboratory investigations. All the recorded data were statistically analyzed with dedicated software. CMR is a relatively new restorative procedure and information on its performance is limited. Within the limitations of the performed laboratory and clinical studies, the present PhD thesis allowed to draw the following conclusions: 1. On the basis of the reviewed literature, currently, there is no strong scientific evidence that could either support or discourage the use of CMR technique prior to restoration of deep subgingival defects with indirect adhesive restorations; further randomized controlled clinical trials are necessary to provide reliable evidence on the influence of CMR technique on the clinical performance, especially on the longevity of restorations and periodontal health. 2. A higher incidence of bleeding on probing can be expected around teeth treated with CMR and in coincidence with deep margins placed at or closer than 2 mm from the bone crest; consequently, CMR should be considered as a clinically sensitive-technique, especially when performed on deep subgingival margins. 3. The marginal sealing ability of flowable and microhybrid resin composites is comparable for CMR; furthermore, luting overlays directly onto dentin without CMR appears to be a better method for limiting marginal leakage underneath CAD/CAM overlays. 4. CMR technique and the adhesive system employed for luting indirect restorations might represent a significant factor affecting microleakage at the interface below CEJ. 5. CMR seems to provide less adequate seal of the margin than the one achieved by cementing the restoration directly to dentin without CMR. The sealing ability of the marginal interface depends on the adhesive materials used for performing CMR. Differences in the quality of the marginal adaptation between two different materials used for CMR could not be detected by SEM observations. SEM examination of the marginal adaptation does not allow for the predictions of the functional sealing of the margins. Future in vitro and in vivo studies should evaluate the effectiveness of CMR technique and the marginal seal of different bonding systems and luting cements in combination with CMR. Particularly, randomized controlled clinical trials should investigate the durability of CMR and the response of periodontal tissues.
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Matthiesen, Stephan. « The feedback between basin and strait processes in the Mediterranean Sea and similar marginal seas : a process study ». Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/15290.

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The Strait of Gibraltar limits the exchange between the Atlantic and the Mediterranean Sea and therefore plays an important role in determining the water properties of the evaporation-dominated Mediterranean Sea. On the other hand, the strait dynamics depends on the boundary conditions set by the basin. To investigate this fundamental feedback between strait and basin processes, a 3-box model of the Mediterranean with a hydraulically controlled strait was programmed. It accommodates both maximal and submaximal strait exchange and does not impose steady state budget constraints, making it particularly useful for investigating transitional and non-equilibrium situations. The model is used in an explorative study to find new dynamical aspects of the system. First, the response of the system to changing air-sea-fluxes is modelled. Increasing evaporation shifts the steady state of the system to a more saline and - as a secondary effect - slightly warmer state. Increased heat loss leads to a colder and slightly less saline basin. Besides shifting the steady state, changes in heat flux and net evaporation can also lead to a nonlinear response in which the pycnocline deepens considerably for a transitional period of decades or centuries before returning to its steady state depth. Second, the effect of rising sea levels since the Last Glacial Maximum (18kyr BP) was modelled. At times of rapid sea level rise, the long residence time leads to stronger stratification and reduced circulation in the basin, providing a possible mechanism for the formation of sapropel S1. Finally the effect of mixing in the hydraulic jump between the Mediterranean and the Strait of Gibraltar is included in the model. The entrainment of inflowing water into the outflow reduces the effective exchange between Atlantic and Mediterranean, and the system develops multiple equilibria. After a comparatively short perturbation (e.g. a 20% larger evaporation for 10 years), the system can move from the stable, well-ventilated state to an almost stagnant meta-stable state which persists for centuries before the well-ventilated state is reestablished.
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Boutin, Guillaume. « Interactions vagues-banquise en zones polaires ». Thesis, Brest, 2018. http://www.theses.fr/2018BRES0050/document.

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La banquise, qui couvre de larges étendues de l’océan près des pôles, est une composante majeure du climat. Le réchauffement de la planète entraîne sa fonte massive, en particulier en Arctique.Là où l’extension de la banquise diminue, l’augmentation du fetch est associée à une élévation de la hauteur des vagues, laissant penser que les effets liés aux interactions vagues-glace pourraient s’accroître dans le futur. L’évolution rapide de la banquise associée à l’intensification des activités humaines dans les régions polaires pressent à améliorer notre connaissance de ces interactions.La banquise atténue les vagues. Elles peuvent néanmoins s’y propager et briser la glace sur de longues distances. L’atténuation dépend des propriétés de la glace comme l’épaisseur, la taille des plaques... Les plaques de glace une fois cassées sont plus susceptibles de dériver et de fondre. En outre, lors de l’atténuation, les plaques sont poussées dans la direction de propagation des vagues.Une représentation simple de la banquise dans un modèle de vagues intégrant une distribution de la taille des plaques nous a permis de montrer l’importance des mécanismes dissipatifs dans l’atténuation, notamment ceux induits par la flexion de la glace.Après avoir été validé, ce modèle a été couplé à un modèle de glace. La taille des plaques est échangée et utilisée dans le calcul de la fonte latérale. La force exercée par les vagues sur la banquise est également envoyée depuis le modèle de vagues. En été, cette force compacte la glace et tend à diminuer la fonte, augmentant significativement la température et la salinité des eaux de surface au bord de la banquise
Sea ice, which covers most of the ocean near the poles, is a key component of the climate system. Global warming is driving its massive melting, especially in the Arctic. Where sea ice cover decreases, fetch increases leading to more energetic sea states. This means potentially enhanced wavesice interactions effects in the future. The quick evolution of sea ice extent and volume combined with the intensification of human activities in polar regions urge us to improve our understanding of waves-ice interactions.Sea ice attenuates waves. They can however propagate through it and break it far into the ice cover. Attenuation depends on ice properties such as floe size, thickness, etc. Once broken, resulting floes are more likely to drift and melt. In addition, wave attenuation yields a force which pushes the floes in the direction of wave propagation.A simplified representation of sea ice, including a floe size distribution, has been incorporated in a wave model.It allows us to show the important contribution of dissipative mechanisms in the wave attenuation, especially those induced by the bending of the ice plates. After validation, the modified wave model is coupled to an ice model. The floe size distribution is exchanged in the coupled framework and used in ice lateral melt computation. The force exerted by the waves on the ice floes is sent from the wave model and is shown to compact sea ice in summer. This reduces the melting and significantly increases the temperature and salinity in the surface ocean close to the ice edge
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Roth, Michael J. « A coastal air-ocean coupled system for the East Asian marginal seas ». Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA406235.

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Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, Sept. 2001.
Thesis advisor, Chu, Peter C. "September 2001." Includes bibliographical references (p. 567-570). Also available in print.
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Di, Noto Giacomo. « Observations and modeling of the Marginal Ice Zone ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10228/.

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Global climate change in recent decades has strongly influenced the Arctic generating pronounced warming accompanied by significant reduction of sea ice in seasonally ice-covered seas and a dramatic increase of open water regions exposed to wind [Stephenson et al., 2011]. By strongly scattering the wave energy, thick multiyear ice prevents swell from penetrating deeply into the Arctic pack ice. However, with the recent changes affecting Arctic sea ice, waves gain more energy from the extended fetch and can therefore penetrate further into the pack ice. Arctic sea ice also appears weaker during melt season, extending the transition zone between thick multi-year ice and the open ocean. This region is called the Marginal Ice Zone (MIZ). In the Arctic, the MIZ is mainly encountered in the marginal seas, such as the Nordic Seas, the Barents Sea, the Beaufort Sea and the Labrador Sea. Formed by numerous blocks of sea ice of various diameters (floes) the MIZ, under certain conditions, allows maritime transportation stimulating dreams of industrial and touristic exploitation of these regions and possibly allowing, in the next future, a maritime connection between the Atlantic and the Pacific. With the increasing human presence in the Arctic, waves pose security and safety issues. As marginal seas are targeted for oil and gas exploitation, understanding and predicting ocean waves and their effects on sea ice become crucial for structure design and for real time safety of operations. The juxtaposition of waves and sea ice represents a risk for personnel and equipment deployed on ice, and may complicate critical operations such as platform evacuations. The risk is difficult to evaluate because there are no long-term observations of waves in ice, swell events are difficult to predict from local conditions, ice breakup can occur on very short time-scales and wave-ice interactions are beyond the scope of current forecasting models [Liu and Mollo-Christensen, 1988,Marko, 2003]. In this thesis, a newly developed Waves in Ice Model (WIM) [Williams et al., 2013a,Williams et al., 2013b] and its related Ocean and Sea Ice model (OSIM) will be used to study the MIZ and the improvements of wave modeling in ice infested waters. The following work has been conducted in collaboration with the Nansen Environmental and Remote Sensing Center and within the SWARP project which aims to extend operational services supporting human activity in the Arctic by including forecast of waves in ice-covered seas, forecast of sea-ice in the presence of waves and remote sensing of both waves and sea ice conditions. The WIM will be included in the downstream forecasting services provided by Copernicus marine environment monitoring service.
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Lipka, Marko [Verfasser], Michael E. [Akademischer Betreuer] Böttcher, Michael E. [Gutachter] Böttcher et Jens [Gutachter] Hartmann. « Current biogeochemical processes and element fluxes in surface sediments of temperate marginal seas (Baltic Sea and Black Sea) / Marko Lipka ; Gutachter : Michael E. Böttcher, Jens Hartmann ; Betreuer : Michael E. Böttcher ». Greifswald : Ernst-Moritz-Arndt-Universität, 2018. http://d-nb.info/1171425538/34.

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Lipka, Marko Verfasser], Michael Ernst [Akademischer Betreuer] [Böttcher, Michael E. [Gutachter] Böttcher et Jens [Gutachter] Hartmann. « Current biogeochemical processes and element fluxes in surface sediments of temperate marginal seas (Baltic Sea and Black Sea) / Marko Lipka ; Gutachter : Michael E. Böttcher, Jens Hartmann ; Betreuer : Michael E. Böttcher ». Greifswald : Ernst-Moritz-Arndt-Universität, 2018. http://d-nb.info/1171425538/34.

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Lipka, Marko Verfasser], Michael Ernst [Akademischer Betreuer] [Böttcher, Michael Ernst [Gutachter] Böttcher et Jens [Gutachter] Hartmann. « Current biogeochemical processes and element fluxes in surface sediments of temperate marginal seas (Baltic Sea and Black Sea) / Marko Lipka ; Gutachter : Michael E. Böttcher, Jens Hartmann ; Betreuer : Michael E. Böttcher ». Greifswald : Ernst-Moritz-Arndt-Universität, 2018. http://d-nb.info/1171425538/34.

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Hill, Jenna Catherine. « Continental margin architecture sea level and climate / ». Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3258373.

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Thesis (Ph. D.)--University of California, San Diego, 2007.
Title from first page of PDF file (viewed May 29, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
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Livres sur le sujet "Marginal seal"

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Carmichael, Robert P. A review of the literature : The marginal gingiva around dental endosseous implants and the epithelial seal. [Toronto : Faculty of Dentistry, University of Toronto], 1987.

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Chen, Chen-Tung Arthur, et Xinyu Guo, dir. Changing Asia-Pacific Marginal Seas. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4886-4.

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1929-, Takano Kenzō, Han'guk Haeyang Hakhoe et JECSS Workshop (5th : 1989 : Kangnung-si (Korea), dir. Oceanography of Asian marginal seas. Amsterdam : Elsevier, 1991.

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World Data Center A for Glaciology. et University of Colorado, Boulder. Cooperative Institute for Research in Environmental Sciences., dir. Marginal ice zone bibliography. Boulder, Colo., U.S.A : World Data Center for Glaciology (Snow and Ice), Cooperative Institute for Research in Environmental Sciences, University of Colorado, 1985.

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Clift, Peter, Wolfgang Kuhnt, Pinxian Wang et Dennis Hayes, dir. Continent-Ocean Interactions Within East Asian Marginal Seas. Washington, D. C. : American Geophysical Union, 2004. http://dx.doi.org/10.1029/gm149.

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Song, Jinming. Biogeochemical Processes of Biogenic Elements in China Marginal Seas. Berlin, Heidelberg : Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-04060-3.

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Song, Jinming. Biogeochemical Processes of Biogenic Elements in China Marginal Seas. Berlin, Heidelberg : Springer-Verlag Berlin Heidelberg, 2010.

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Songling, Zhao, et Wasiliev Boris 1929-, dir. Xi bei Taiping Yang bian yuan hai di zhi : Geology of marginal seas in the northwest Pacific. Ha'erbin : Heilongjiang jiao yu chu ban she, 2000.

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Chudinov, I͡U V. Global eduction tectonics of the expanding earth. Utrecht : VSP, 1998.

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Birnbaum, Gerit. Numerische Modellierung der Wechselwirkung zwischen Atmosphäre und Meereis in der arktischen Eisrandzone = : Numerical modelling of the interaction between atmosphere and sea ice in the Arctic marginal ice zone. Bremerhaven : Alfred-Wegener-Institut für Polar- und Meeresforschung, 1998.

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Chapitres de livres sur le sujet "Marginal seal"

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Zhou, Di. « Marginal Seas ». Dans Encyclopedia of Marine Geosciences, 1–7. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6644-0_187-1.

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Chen, Chen-Tung Arthur. « Marginal Seas ». Dans Global Change – The IGBP Series, 331–421. Berlin, Heidelberg : Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-92735-8_7.

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Muravyev, Alexander. « On Geothermal Problems of the Marginal Seas ». Dans Heat-Mass Transfer and Geodynamics of the Lithosphere, 139–57. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63571-8_9.

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Barale, Vittorio. « The African Marginal and Enclosed Seas : An Overview ». Dans Remote Sensing of the African Seas, 3–29. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8008-7_1.

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Barale, Vittorio. « The European Marginal and Enclosed Seas : An Overview ». Dans Remote Sensing of the European Seas, 3–22. Dordrecht : Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6772-3_1.

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Barale, Vittorio. « The Asian Marginal and Enclosed Seas : An Overview ». Dans Remote Sensing of the Asian Seas, 3–38. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94067-0_1.

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He, Xianqiang, et Xiaoyan Chen. « Ocean Colour Remote Sensing in Chinese Marginal Seas ». Dans Remote Sensing of the Asian Seas, 305–19. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94067-0_17.

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Zavialov, Peter O., Andrey G. Zatsepin, Peter N. Makkaveev, Alexander Kazmin, Vyacheslav V. Kremenetskiy et Vladimir B. Piotuh. « Implications of Climate Change for Marginal and Inland Seas ». Dans National Security and Human Health Implications of Climate Change, 289–99. Dordrecht : Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2430-3_25.

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Uye, Shin-Ichi. « The Giant Jellyfish Nemopilema nomurai in East Asian Marginal Seas ». Dans Jellyfish Blooms, 185–205. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7015-7_8.

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Brovko, Petr, Yuri Mikishin et Tamara Ponomareva. « Estuaries, Lagoons, and Limans of the Marginal Seas of Northeast Asia ». Dans The Diversity of Russian Estuaries and Lagoons Exposed to Human Influence, 57–92. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-43392-9_3.

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Actes de conférences sur le sujet "Marginal seal"

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Darden, J. Mark, Eric M. Earhart et George T. Flowers. « Comparison of the Dynamic Characteristics of Smooth Annular Seals and Damping Seals ». Dans ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-177.

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Annular seals are known to enhance rotordynamic stability margins and minimize vibration response levels in high-speed rotating machinery. Theoretical predictions for the rotordynamic characteristics of annular seals exist but additional experimental data is needed to properly anchor these results. NASA’s Marshall Space Flight Center (MSFC) has developed an annular seal test rig and facility to experimentally characterize axially-fed annular seals. Annular seals with deliberately roughened stators (i.e. damping seals) have been shown analyticalty to increase stability margins of rocket engine turbomachinery by reducing the seal’s whirl frequency ratio. The capabilities of MSFC’s annular seal test rig have been enhanced to allow high fluid inlet preswirl testing that is more representative of actual turbopump seal bounder conditions. The purpose of this paper is to describe the effect of this realistic preswirl on the stabilizing capability of both damping and smooth seals. Centered seal results are presented for both a smooth annular seal and a damping seal. These results were obtained for a range of seal pressure differentials, shaft rotational speeds, and two levels of inlet fluid preswirl.
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Darden, J. Mark, Eric M. Earhart et George T. Flowers. « Influence of Seal Geometry on the Rotordynamic Characteristics of a Round-Hole Pattern Damping Seal ». Dans 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-21635.

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Abstract In the design of high-speed rotating machinery, engineers are seeking ways to enhance rotordynamic stability margins while minimizing vibration levels. An attractive option to improve stability margins is the use of annular seals. These seals are versatile because they are effective sealing elements, possess both stiffness and damping characteristics, and are easily incorporated into a pump. Design of an effective seal requires insight into the parameters that can influence its rotordynamic characteristics. Analysis indicates that changes in clearance and taper can significantly affect direct stiffness as well as other seal characteristics. With this in mind, test results are presented for seals with identical round-hole pattern stator surface treatments at two constant radial clearances and one tapered-seal configuration. Testing is performed with a realistic, high inlet fluid preswirl condition that enables an evaluation of a given seal’s stabilizing capacity. All test results presented are for a centered seal condition at multiple shaft speeds and pressure levels. Experimental trends are consistent with theory in that gains in direct stiffness are realized with both a decrease in a seal’s radial clearance and with a convergent-taper. Also, the stabilizing capacity of the seals was significantly influenced by the configurations tested.
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Idris, Nurul Hazrina, et Muhammad Haikal Fayyadh Munadi. « Recent progress on sea-level rise over the marginal seas in Southeast Asia ». Dans Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2022, sous la direction de Charles R. Bostater et Xavier Neyt. SPIE, 2022. http://dx.doi.org/10.1117/12.2639437.

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Darden, J. Mark, Eric M. Earhart et George T. Flowers. « Experimental Rotordynamic Characterization of Annular Seals : Facility and Methodology ». Dans ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-017.

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Annular seals are known to enhance rotordynamic stability margins and minimize vibration response levels in high-speed rotating machinery. Theoretical predictions for the rotordynamic characteristics of annular seals exist but additional experimental data is needed to properly anchor these results. NASA’s Marshall Space Flight Center (MSFC) has developed an annular seal test rig and facility to experimentally characterize axially-fed annular seals. The objective of MSFC’s annular seal test rig is to obtain the rotordynamic coefficients (direct and cross-coupled stiffness, damping, and added mass) for a variety of high Reynolds number annular seals. The MSFC test rig supports centered-seal testing with inlet pressures up to 138 bars (2000 psi) and flow rates of over 946 liters per minute (250 gpm). The rig’s shaft is powered by a 186 kilowatt (250 horsepower) steam turbine capable of rotational speeds of over 20,000 revolutions per minute (rpm). A description of the identification process used to obtain rotordynamic coefficients is given as well as procedures for ensuring quality data. Experimental results for a smooth annular seal with an L/D = 0.5 is presented. Excellent agreement between experimental and theoretical results is obtained.
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Liu, W. T., Shang-Ping Xie et Xiaosu Xie. « Coupling between the atmosphere and Asian Marginal Seas ». Dans Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492). IEEE, 2003. http://dx.doi.org/10.1109/oceans.2003.178433.

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Martinez, Justino, Estrella Olmedo, Veronica Gonzalez-Gambau, Antonio Turiel et Simon Yueh. « Blended SMOS-SMAP SSS product in marginal seas ». Dans 2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS). IEEE, 2017. http://dx.doi.org/10.1109/igarss.2017.8127612.

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Becht, David G., Larry A. Hawkins, Joseph K. Scharrer et Brian T. Murphy. « Suppression of Subsynchronous Vibration in the SSME HPFTP ». Dans ASME 1991 Design Technical Conferences. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/detc1991-0271.

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Abstract SSME HPFTP hot-fire dynamic data evaluation and rotordynamic analysis both confirm that two of the most significant turbopump attributes in determining susceptibility to subsynchronous vibration are impeller interstage seal configuration and rotor sideload resulting from turbine turnaround duct configuration and hot gas manifold. Recent hot-fire testing has provided promising indications that the incorporation of roughened “damping” seals at the impeller interstages may further increase the stability margin of this machine. A summary of the analysis which led to the conclusion that roughened seals would enhance the stability margin is presented herein, along with a correlation of the analysis with recent test data.
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Ramachandran, Madhumitha, et Zahed Siddique. « Statistical Time Domain Feature Based Approach to Assess the Performance Degradation of Rotary Seals ». Dans ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87857.

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In oil and gas industry, machineries and mechanical components are designed with high reliability to meet the demand of the oil field. Rotating machinery is a widely used equipment and any failure of critical components within the machinery could lead to delays and large expenses. Failure of rotary seal is one of the foremost causes of breakdown in rotary machinery and such a failure can affect the other process operations in oil and gas plants. Assessing seal degradation and severity estimation are very important for maintenance decision-making. Extracting meaningful and sensitive features that can show seal degradation from raw signals is a challenging task of degradation assessment. However, no extensive works are dedicated in this area of seals. In this paper, we perform accelerated aging and testing to capture the behavior of seals through their cycle of operation and demonstrated a statistical time domain feature based approach for extracting the sensitive features that can show seal degradation. Out of eleven statistical features extracted, seven extracted features such as mean, RMS, maximum, squared mean rooted absolute amplitude, impulse factor, crest factor, margin factor are found to be significant factors which have a potential to differentiate severity levels in seals. The findings from our work show that our approach has a potential to assess the severity in seals. As a possible extension, extracted features can be used to build a classification model to classify severity in seals which could be of great interest to the users and manufacturers of rotary seals.
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Dominic, P. R. « Reservoir Management in a Marginal North Sea Cluster Development ». Dans Offshore Europe. Society of Petroleum Engineers, 1993. http://dx.doi.org/10.2118/26763-ms.

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Apeland, Odd J., Svein Flaate et Tom Skoglunn. « Yme, A Marginal Field Development in the North Sea ». Dans SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1998. http://dx.doi.org/10.2118/49126-ms.

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Rapports d'organisations sur le sujet "Marginal seal"

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Kantha, Lakshmi H., Diane M. Beitzell, Scott L. Harper et Robert R. Leben. Altimetry in Marginal, Semi-Enclosed and Coastal Seas. Part I : Marginal and Semi-Enclosed Seas,. Fort Belvoir, VA : Defense Technical Information Center, janvier 1994. http://dx.doi.org/10.21236/ada327265.

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Spall, Michael A. Marginal Sea-Open Ocean Exchange. Fort Belvoir, VA : Defense Technical Information Center, décembre 2002. http://dx.doi.org/10.21236/ada416517.

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Spall, Michael A. Marginal Sea - Open Ocean Exchange. Fort Belvoir, VA : Defense Technical Information Center, août 2002. http://dx.doi.org/10.21236/ada626387.

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Dahl, Peter H., et Jee W. Choi. Head Waves in Asian Marginal Seas. Fort Belvoir, VA : Defense Technical Information Center, septembre 2006. http://dx.doi.org/10.21236/ada612126.

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Dahl, Peter H., et Jee W. Choi. Head Waves in Asian Marginal Seas. Fort Belvoir, VA : Defense Technical Information Center, septembre 2007. http://dx.doi.org/10.21236/ada541282.

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Mooers, Christopher N. Circulation of Marginal and Semi-enclosed Seas (Sea of Japan and Related Process Studies). Fort Belvoir, VA : Defense Technical Information Center, septembre 1997. http://dx.doi.org/10.21236/ada628243.

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Mooers, Christopher N. Circulation of Marginal and Semi-Enclosed Seas (Sea of Japan and Related Process Studies). Fort Belvoir, VA : Defense Technical Information Center, septembre 1999. http://dx.doi.org/10.21236/ada629767.

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Mooers, Christopher N. Circulation of Marginal and Semi-Enclosed Seas (Sea of Japan and Related Process Studies). Fort Belvoir, VA : Defense Technical Information Center, septembre 2001. http://dx.doi.org/10.21236/ada625098.

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Mooers, Christopher N. Circulation of Marginal and Semi-Enclosed Seas (Sea of Japan and Related Process Studies). Fort Belvoir, VA : Defense Technical Information Center, septembre 2002. http://dx.doi.org/10.21236/ada626936.

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Johns, William E. Dynamics of Boundary Currents and Marginal Seas. Fort Belvoir, VA : Defense Technical Information Center, septembre 1997. http://dx.doi.org/10.21236/ada628241.

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