Gotowe bibliografie tematyczne / Deep-water immersion

Gotowa bibliografia na temat „Deep-water immersion”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 1 lutego 2022

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Artykuły w czasopismach na temat "Deep-water immersion"

WANG, QIAN, SHIBIAO WEI, GUANGHUI YUAN i XIAO-CONG YUAN. "WATER-IMMERSION DEEP-SUBWAVELENGTH SURFACE PLASMON VIRTUAL PROBES". Journal of Molecular and Engineering Materials 02, nr 02 (czerwiec 2014): 1440010. http://dx.doi.org/10.1142/s2251237314400103.

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In this paper, we report the observation of surface plasmon virtual probes in water by using near-field scanning optical microscope. The full-width half-maximum of the probe is as small as λ0/5.5. Such deep-subwavelength sized plasmonic virtual probe may lead to many potential applications, such as super-resolution fluorescence optical imaging and optical manipulation.

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Romet, T. T. "Mechanism of afterdrop after cold water immersion". Journal of Applied Physiology 65, nr 4 (1.10.1988): 1535–38. http://dx.doi.org/10.1152/jappl.1988.65.4.1535.

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It was hypothesized that if afterdrop is a purely conductive phenomenon, the afterdrop during rewarming should proceed initially at a rate equal to the rate of cooling. Eight male subjects were cooled on three occasions in 22 degrees C water and rewarmed once by each of three procedures: spontaneous shivering, inhalation of heated (45 degrees C) and humidified air, and immersion up to the neck in 40 degrees C water. Deep body temperature was recorded at three sites: esophagus, auditory canal, and rectum. During spontaneous and inhalation rewarming, there were no significant differences between the cooling (final 30 min) and afterdrop (initial 10 min) rates as calculated for each deep body temperature site, thus supporting the hypothesis. During rapid rewarming, the afterdrop rate was significantly greater than during the preceding cooling, suggesting a convective component contributing to the increased rate of fall. The rapid reversal of the afterdrop also indicates that a convective component contributes to the rewarming process as well.

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Castleberry, Todd, Vic BenEzra, Sarah Deemer, Tara Niemann i Janie Foreman. "The Effects of Deep Water Running and Cold Water Immersion on Muscle Soreness". Medicine & Science in Sports & Exercise 47 (maj 2015): 357. http://dx.doi.org/10.1249/01.mss.0000477395.02083.8a.

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Zheng, Jing, Junqiao Zhang, Lu Tan, Debing Li, Liangliang Huang, Qi Wang i Yingchun Liu. "Effects of Aspect Ratio on Water Immersion into Deep Silica Nanoholes". Langmuir 32, nr 34 (17.08.2016): 8759–66. http://dx.doi.org/10.1021/acs.langmuir.6b01575.

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Greenwood, Austin, i Cordial Gillette. "Effect of Cold Water Immersion on Metabolic Rate in Humans". International Journal of Kinesiology and Sports Science 5, nr 2 (30.04.2017): 1. http://dx.doi.org/10.7575/aiac.ijkss.v.5n.2p.1.

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Background: Cold water immersion is a widely used form of cryotherapy in the active population despite the limited knowledge on its physiological effects. From an injury standpoint, reducing metabolic rate is advantageous to prevent secondary injury. In contrast, increased metabolism can be beneficial in ridding the body of unwanted metabolites. This study looked to determine the effect of cold water immersion on metabolic rate. Understanding this phenomenon will help determine appropriate clinical applications of cold water immersion and lead to a better understanding of cryotherapy in general. This study looked to determine the effect of cryotherapy in the form of waist deep cold water immersion at 9° C on metabolic rate. Methods: 10 participants from a university student population volunteered and completed a 15-minute treatment of waist deep cold water (9° C) immersion. Metabolic rate measurements were taken using a Jaeger Oxycon Mobile Unit for 5 minutes prior to treatment, 15 minutes of treatment, and 5 minutes post treatment for a total of 25 minutes. Statistical analysis was completed using a one way repeated measures ANOVA test to compare treatment intervals to baseline intervals. Results: Cold water immersion resulted in elevated metabolic rates for 8 of 10 participants during the first 5 minutes of treatment and for 6 of 10 in the 5 minute post treatment (p < 0.05). A second statistical analysis excluding the first 30 second data point in the 5-10 and 20-25 minute treatments was used to account for movement in and out of the whirlpool. The second analysis showed the same results as the first with the exception of one participant who no longer displayed a statistically significant change in the 20-25 minute interval. Conclusion: These results indicate that cold water immersion should not be used as a measure of reducing secondary injury because of its potential to increase metabolic rate, but instead may have potential benefits in exercise recovery.

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Bierens, Joost J. L. M., Philippe Lunetta, Mike Tipton i David S. Warner. "Physiology Of Drowning: A Review". Physiology 31, nr 2 (marzec 2016): 147–66. http://dx.doi.org/10.1152/physiol.00002.2015.

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Drowning physiology relates to two different events: immersion (upper airway above water) and submersion (upper airway under water). Immersion involves integrated cardiorespiratory responses to skin and deep body temperature, including cold shock, physical incapacitation, and hypovolemia, as precursors of collapse and submersion. The physiology of submersion includes fear of drowning, diving response, autonomic conflict, upper airway reflexes, water aspiration and swallowing, emesis, and electrolyte disorders. Submersion outcome is determined by cardiac, pulmonary, and neurological injury. Knowledge of drowning physiology is scarce. Better understanding may identify methods to improve survival, particularly related to hot-water immersion, cold shock, cold-induced physical incapacitation, and fear of drowning.

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Forrest, George, i Kurt Rosen. "Ultrasound Treatments in Degassed Water". Journal of Sport Rehabilitation 1, nr 4 (listopad 1992): 284–89. http://dx.doi.org/10.1123/jsr.1.4.284.

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Ultrasound is a commonly used modality of deep heating. Two techniques of application have been recommended: a technique in which the applicator head is applied directly to the subject and an immersion technique, The purpose of this study was to determine whether ultrasound treatments using the immersion technique in degassed water are as effective as ultrasound treatments using the direct technique of application in raising the temperature of periarticular structures into the therapeutic range. The limbs of a pig were treated with the direct and immersion techniques of application. Temperatures of the skin surface and of the extensor tendons of the ankle were taken before and after both methods of application. Treatments with the applicator head in direct contact with the limb of the subject were the more effective form of heating.

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Iwamoto, J., S. Sagawa, F. Tajima, K. Miki i K. Shiraki. "Critical water temperature during water immersion at various atmospheric pressures". Journal of Applied Physiology 64, nr 6 (1.06.1988): 2444–48. http://dx.doi.org/10.1152/jappl.1988.64.6.2444.

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The present work was undertaken to determine the effect of atmospheric pressure [ranging from a high altitude of 4,300 m above sea level or 0.6 atmospheres absolute (ATA) to depths of 10 m deep or 2 ATA] on the critical water temperature (Tcw), defined as the lowest water temperature a subject can tolerate at rest for 2 h without shivering, of the unprotected subject during water immersion. Nine healthy males wearing only shorts were subjected to immersion to the neck in water at 0.6, 1, and 2 ATA while resting for 2 h. Continuous measurements included esophageal (Tes) and skin (Tsk) temperatures, direct heat loss from the skin (Htissue), and insulation of the tissue (Itissue). The Tcw was significantly higher at 0.6 ATA than 1 and 2 ATA: however, Tcw at 1 ATA was identical to that at 2 ATA. The metabolic heat production remained unchanged among the pressures. During the 2-h immersion in Tcw, Tes was identical among all atmospheric pressures: however, Tsk was significantly higher (P less than 0.05) at 0.6 ATA and was identical between 1 and 2 ATA. The overall mean Itissue was near maximal during immersion in Tcw in each pressure, and no difference was detected among the pressures. However, Itissue at the acral extremities (arm, hand, and foot) decreased significantly at 0.6 ATA, and subsequently heat loss from these parts was increased, which elevated an extremity-to-trunk heat loss ratio to 1.4 at 0.6 ATA from 1.1 at 1 and 2 ATA.

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Rodríguez, L., A. Benavides-Moran i S. Laín. "Three-Bladed Horizontal Axis Water Turbine Simulations with Free Surface Effects". International Journal of Applied Mechanics and Engineering 26, nr 3 (26.08.2021): 187–97. http://dx.doi.org/10.2478/ijame-2021-0044.

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Abstract The water level above a hydrokinetic turbine is likely to vary throughout the season and even along the day. In this work, the influence of the free surface on the performance of a three bladed horizontal-axis turbine is explored by means of a three-dimensional, transient, two-phase flow computational model implemented in the commercial CFD software ANSYS Fluent 19.0. The k – ω SST Transition turbulence model coupled with the Volume of Fluid (VOF) method is used to track the air-water interface. The rotor diameter is D = 0 8m. Two operating conditions are analyzed: deep tip immersion (0.55D) and shallow tip immersion (0.19D). Three tip speed ratios are evaluated for each immersion. Simulation results show a good agreement with experimental data reported in the literature, although the computed torque and thrust coefficients are slightly underestimated. Details of the free surface dynamics, the flow past the turbine and the wake near the rotor are also discussed.

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Jing, Wei, Xu Wang, Pengwei Hao, Laiwang Jing i Weipei Xue. "Instability Mechanism and Key Control Technology of Deep Soft Rock Roadway under Long-Term Water Immersion". Advances in Civil Engineering 2021 (6.01.2021): 1–13. http://dx.doi.org/10.1155/2021/6670379.

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More and more attention has been paid to the supporting problem of deep soft rock roadway floor with long-term water immersion in recent years. However, the existing soft rock roadway support technology rarely takes into account the influence of the immersion softening phenomenon of the roadway floor and the self-supporting structure characteristics of the surrounding rock on the stability of the surrounding rock at the same time, and the influence of the creep characteristics of rock on the deformation zone of the surrounding rock requires further research on the nature and division of the self-supporting structure of the surrounding rock. In response to the issues mentioned, based on the loading and unloading properties of the surrounding rock of the soft rock roadway, a new concept of the internal and external self-bearing structure was proposed. The fact of water-immersed mudstone softening in the soft rock roadway floor was revealed through the field practice, and the shape of the internal and external bearing structure was determined based on the in situ monitoring results. Then, the instability mechanism of the internal and external self-bearing structure of the surrounding rock was analyzed, the position of the critical control point was calculated, and the key control technology based on the method of controlling floor heave by using double-row anchor cables to control the deformation of the roadway sides was put forward. Finally, the field industrial test showed that this support technology can effectively control the deformation and failure of soft rock roadway in the case of water immersion on the floor. This work can provide a technical reference for similar roadway support designs.

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Rozprawy doktorskie na temat "Deep-water immersion"

Sprague, Annie G., i res cand@acu edu au. "An Investigation into the Use of Water Immersion upon the Outcomes and Experience of Giving Birth". Australian Catholic University. School of Nursing, 2004. http://dlibrary.acu.edu.au/digitaltheses/public/adt-acuvp56.29082005.

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The use of deep-water immersion during labour and birth is commonplace in many countries including Australia, yet there has been little contemporary Australian data from which to form policies regarding its use during childbirth, or which have included women’s experiences using water immersion. The literature reviewed for this study was positive with regard to the effect of water immersion during childbirth and was associated with decreased rates of perineal trauma, low episiotomy rates, low rates of analgesic use, lower operative deliveries coupled with increased maternal satisfaction of the experience of childbirth when compared with births where water immersion was not involved. The purpose of this research was to investigate the influence of deep-water immersion upon maternal and neonatal outcomes and women's experiences of giving birth in Australia. This study used a mixed method in an attempt to fulfil this purpose: the first phase was a Quasi-experimental design and the second phase was based upon a Hermeneutic Phenomenological approach. Data were collected via a Random Chart Audit, from a random sample of fifty nulliparous women who used deepwater immersion during labour and childbirth and six women were selected to participate in a semi-structured interview. Data from each phase of this study revealed positive birth outcomes and these findings were supported by the literature. The women's stories were positive and comprised elements of four lifeworld themes. • Water’s Embrace • Warped Time • Naked but Clothed • The Shape of Water. Each of these themes encapsulated different aspects of the women's experiences, which when considered together, increased the understanding of the phenomenon of deep-water immersion upon the experience of giving birth.

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Książki na temat "Deep-water immersion"

Deep Immersion: The Experience of Water. Green Frigate Books, 2003.

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Streszczenia konferencji na temat "Deep-water immersion"

Secher, Philippe, Fabrice Bectarte i Antoine Felix-Henry. "Lateral Buckling of Armor Wires in Flexible Pipes: Reaching 3000m Water Depth". W ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49447.

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This paper presents the latest progress on the armor wires lateral buckling phenomena with the qualification of flexible pipes for water depths up to 3,000m. The design challenges specific to ultra deep water are governed by the effect of the external pressure: Armor wires lateral buckling is one of the failure modes that needs to be addressed when the flexible pipe is empty and subject to dynamic curvature cycling. As a first step, the lateral buckling mechanism is described and driving parameters are discussed. Then, the program objective is presented together with flexible pipe designs: - Subsea dynamic Jumpers applications; - Sweet and Sour Service; - Internal diameters up to 11″. Dedicated flexible pipe components were selected to address the severe loading conditions encountered in water depths up to 3,000m. Hydrostatic collapse resistance was addressed by a thick inner carcass layer and a PSI pressure vault. Armor wires lateral buckling was addressed by the design and industrialization of new tensile armor wires. The pipe samples were manufactured using industrial production process in the factories in France and Brazil. The available testing protocols are then presented discussing their advantages and drawbacks. For this campaign, a combination of Deep Immersion Performances (DIP) tests and tests in hyperbaric chambers was selected. The DIP test campaign was performed End 2009 beginning 2010 in the Gulf of Mexico using one of Technip Installation Vessel. These tests replicated the actual design conditions to which a flexible pipe would be subjected during installation and operation. The results clearly demonstrated the suitability of flexible pipes as a valid solution for ultra deep water applications. In addition, the DIP tests results were compared to the tests in hyperbaric chambers giving consistent results. This campaign provided design limitations of the new designs for both 9″ and 11″ internal diameter flexible pipes, in sweet and sour service in water depths up to 3,000m.

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Kuchay, Olga A. "The focal mechanisms of earthquakes in the bending region of the lithospheric plate depending on the characteristics of its sinking". W Недропользование. Горное дело. Направления и технологии поиска, разведки и разработки месторождений полезных ископаемых. Экономика. Геоэкология. Федеральное государственное бюджетное учреждение науки Институт нефтегазовой геологии и геофизики им. А.А. Трофимука Сибирского отделения Российской академии наук, 2020. http://dx.doi.org/10.18303/b978-5-4262-0102-6-2020-047.

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In the subduction zone of the Aleutian arc, the angle of inclination of the sinking Pacific plate affects the focal mechanisms of earthquakes registered in the upper part (up to 35 km) of the oceanic plate at the point of its bend, before sinking into the deep–water trough. With a steep slope of the immersion Pacific plate, there are earthquakes with normal faults in the foci, with a gentle slope – a small number with thrust faults. In areas of flat plate displacement in the depth range of 36–70, earthquakes with with normal faults in the foci.

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Hackel, Lloyd A., i Jon E. Rankin. "Lifetime Enhancement of Propulsion Shafts Against Corrosion-Fatigue by Laser Peening". W SNAME 15th Propeller and Shafting Symposium. SNAME, 2018. http://dx.doi.org/10.5957/pss-2018-01.

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This paper reports substantially enhanced fatigue and corrosion-fatigue lifetimes of propulsion shaft materials, 23284A steel and 23284A steel with In625 weld overlay cladding, as a result of shot or laser peening. Glass reinforced plastic (GRP) coatings and Inconel claddings are used to protect shafts against general corrosion and corrosion pitting. However salt water leakage penetrating under a GRP can actually enhance pitting leading to crack initiation and growth. Fatigue coupons, untreated and with shot or laser peening were tested, including with simultaneous salt water immersion. Controlled corrosion of the surfaces was simulated with electric discharge machining (EDM) of deep pits enabling evaluation of fatigue and corrosion-fatigue lifetimes. Results specifically show high energy laser peening (HELP) to be a superior solution, improving corrosion-fatigue resistance of shaft and cladding metal, reducing the potential for corrosion pits to initiate fatigue cracks and dramatically slowing crack growth rates. At a heavy loading of 110% of the 23284A steel yield stress and with 0.020 inch deep pits, laser peening increased fatigue life of the steel by 1370% and by 350% in the corrosion-fatigue testing.

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Wang, Christian, Martin Halsteen i Jesper Ries. "Qualification of Sealing System for Flexible Pipes Using a Self-Energized Gasket". W ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-77183.

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In order to meet higher technical demands designing flexible pipes at higher pressures and higher temperatures for deeper water depths NOV has introduced and qualified a new sealing system that is self-energized. The sealing material has been qualified and tested in different fluids. The sealing system has shown good functionality at higher pressures as well as at lower pressures. The qualification of the sealing system has been based on multiple full-scale and mid-scale tests according to Recommended Practice API 17B and small-scale tests on the elastomer material including long-term ageing tests and rapid gas decompression tests in high pressure CO2 up to 900 bar. The recommendations of RP API 17B used in the industry has its limitation with regards to qualification of a new sealing system. This paper gives an overview how to qualify a new sealing system on an existing product range achieving different technology readiness levels according to Recommended Practice API 17N from TRL1 up to TRL5. TRL5 covers system integration testing by full-scale testing of flexible pipes such as burst test, tension-pressure test, tension-tension test and deep immersion performance test. All qualification tests have been witnessed by a third-party Bureau Veritas and the enhanced sealing system has archived a TRL5 statement within its current design envelope.

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