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Готові списки джерел за темами / Sinking speed

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Добірка наукової літератури з теми "Sinking speed"

Автор: Grafiati

Опубліковано: 20 квітня 2024

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Статті в журналах з теми "Sinking speed"

1

TUCKER, VANCE A. "Gliding Birds: Descending Flight of the Whitebacked Vulture, Gyps Africanus." Journal of Experimental Biology 140, no. 1 (1988): 325–44. http://dx.doi.org/10.1242/jeb.140.1.325.

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The air speeds and sinking speeds of birds gliding at equilibrium fall in a performance area when these quantities are plotted against one another. Three curves bound the performance area: (i) a curve for minimum sinking speed at each air speed, (ii) a curve for maximum sinking speed at each air speed, and (iii) a curve dependent on the maximum lift coefficient of the wings. I have discussed curve i in a previous paper. This paper discusses the theory of curves ii and iii, which describe rapid descent in gliding birds. I used an optical tracking device (an ornithodolite) to measure air speeds

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2

Rosen, M., and A. Hedenstrom. "Gliding flight in a jackdaw: a wind tunnel study." Journal of Experimental Biology 204, no. 6 (2001): 1153–66. http://dx.doi.org/10.1242/jeb.204.6.1153.

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We examined the gliding flight performance of a jackdaw Corvus monedula in a wind tunnel. The jackdaw was able to glide steadily at speeds between 6 and 11 m s(−1). The bird changed its wingspan and wing area over this speed range, and we measured the so-called glide super-polar, which is the envelope of fixed-wing glide polars over a range of forward speeds and sinking speeds. The glide super-polar was an inverted U-shape with a minimum sinking speed (V(ms)) at 7.4 m s(−1) and a speed for best glide (V(bg)) at 8.3 m s(−)). At the minimum sinking speed, the associated vertical sinking speed wa

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3

Thahir, Muhammad Agam, Irwandy Syofyan, and Isnaniah Isnaniah. "PENGUJIAN SINKING SPEED SERAT ALAMI." JURNAL PERIKANAN TROPIS 4, no. 1 (2017): 93. http://dx.doi.org/10.35308/jpt.v4i1.59.

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The aim of this study to determine the elongation of three types of natural fibers. The method used is an experiment, by directly testing samples of the rope in the aquarium. Sinking speed value of banana stem fiber is 4.8 cm / sec, pandan leaves 3.9 cm / sec, bundung grass fibers 2.6 cm / sec. The third of these natural fibers, banana stem fibers that have the potential as for natural fibre rope material fishing gear.

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4

Shan, Chenxu, Hao Tang, Nyatchouba Nsangue Bruno Thierry, et al. "Sinking Behavior of Netting Panels Made with Various Twine Materials, Solidity Ratios, Knot Types, and Leadline Weights in Flume Tank." Journal of Marine Science and Engineering 11, no. 10 (2023): 1972. http://dx.doi.org/10.3390/jmse11101972.

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Netting is an important component of fishing gear design, and its ability to sink determines the effectiveness of fishing gears such as purse seines, falling nets, and stick-held nets. Therefore, it is crucial to thoroughly investigate the sinking parameters (sinking depth and sinking speed) of the netting panel as a function of the leadline weights using various twine materials, knot types, and solidity ratios. In this study, a generalized additive model (GAM) was utilized to analyze the impact of each factor on the sinking performances of the netting. The results revealed that the sinking de

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5

Spilling, Kristian, Malte Heinemann, Mari Vanharanta, et al. "Respiration rate scales inversely with sinking speed of settling marine aggregates." PLOS ONE 18, no. 3 (2023): e0282294. http://dx.doi.org/10.1371/journal.pone.0282294.

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Sinking marine aggregates have been studied for a long time to understand their role in carbon sequestration. Traditionally, sinking speed and respiration rates have been treated as independent variables, but two recent papers suggest that there is a connection albeit in contrasting directions. Here we collected recently formed (<2 days old) aggregates from sediment traps mounted underneath mesocosms during two different experiments. The mesocosms were moored off Gran Canaria, Spain (~ 27.9 N; 15.4 E) in a coastal, sub-tropical and oligotrophic ecosystem. We determined the respiration rates

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6

Kloos, Heidi, and Guy C. Van Orden. "Can a Preschooler’s Mistaken Belief Benefit Learning?" Swiss Journal of Psychology 64, no. 3 (2005): 195–205. http://dx.doi.org/10.1024/1421-0185.64.3.195.

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Young children erroneously believe that differences either in mass alone or in volume alone can predict differences in sinking speed. The current study was an attempt to teach preschool children that neither mass nor volume alone is predictive for sinking speed. Instead, it is the average density of an object that can predict differences in sinking speed. Twenty-four 4-to 6-year-olds participated. In an initial phase, children’s mistaken beliefs about the effects of mass and volume on sinking speed were called to their minds. Then they were presented with demonstrations of sinking objects that

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7

Fitri, Amraini, Nofrizal Nofrizal, Romie Jhonnerie, and Fauzan Ramadhan. "Absorption and Sinking Speed of Artocarpus Stems Rope (Artocarpus sp.) and Carex Grass Rope (Carex sp.) in Freshwater and Seawater." Jurnal Perikanan dan Kelautan 27, no. 3 (2022): 354. http://dx.doi.org/10.31258/jpk.27.3.354-357.

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Анотація:

Artocarpus stems (Artocarpus sp.) and Carex grass (Carex sp.) have not been applied to fishing gear materials. The fibers produced made into a rope, where this rope is used to absorption and sinking speed test in fresh water and sea water.The absorption of Artocarpus stems rope was 320.30% and 282,60% in fresh water and sea water. Meanwhile for sinking speed have a 5,78 cm/s and 5,08 cm/s for fresh water and sea water. For the Carex grass rope, the absorption in fresh water and sea water was 287,67% and 218,02%. Sinking speed value 2,97 cm/s and 2,67 cm/s for fresh water and sea water. The val

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8

Bergan, Alexander J., Gareth L. Lawson, Amy E. Maas, and Zhaohui Aleck Wang. "The effect of elevated carbon dioxide on the sinking and swimming of the shelled pteropod Limacina retroversa." ICES Journal of Marine Science 74, no. 7 (2017): 1893–905. http://dx.doi.org/10.1093/icesjms/fsx008.

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Abstract Shelled pteropods are planktonic molluscs that may be affected by ocean acidification. Limacina retroversa from the Gulf of Maine were used to investigate the impact of elevated carbon dioxide (CO2) on shell condition as well as swimming and sinking behaviours. Limacina retroversa were maintained at either ambient (ca. 400 µatm) or two levels of elevated CO2 (800 and 1200 µatm) for up to 4 weeks, and then examined for changes in shell transparency, sinking speed, and swimming behaviour assessed through a variety of metrics (e.g. speed, path tortuosity, and wing beat frequency). After

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9

Kriest, I., and A. Oschlies. "On the treatment of particulate organic matter sinking in large-scale models of marine biogeochemical cycles." Biogeosciences 5, no. 1 (2008): 55–72. http://dx.doi.org/10.5194/bg-5-55-2008.

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Abstract. Various functions have been suggested and applied to represent the sedimentation and remineralisation of particulate organic matter (POM) in numerical ocean models. Here we investigate some representations commonly used in large-scale biogeochemical models: a constant sinking speed, a sinking speed increasing with depth, a spectrum of particles with different size and different size-dependent sinking velocities, and a model that assumes a power law particle size distribution everywhere in the water column. The analysis is carried out for an idealised one-dimensional water column, und

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10

Kriest, I., and A. Oschlies. "On the treatment of particulate organic matter sinking in large-scale models of marine biogeochemical cycles." Biogeosciences Discussions 4, no. 4 (2007): 3005–40. http://dx.doi.org/10.5194/bgd-4-3005-2007.

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Анотація:

Abstract. Various functions have been suggested and applied to represent the sedimentation and remineralisation of particulate organic matter (POM) in numerical ocean models. Here we investigate some representations commonly used in large-scale biogeochemical models: a constant sinking speed, a sinking speed increasing with depth, a spectrum of particles with different size and different size-dependent sinking velocities, and a model that assumes a power-law particle size distribution everywhere in the water column. The analysis is carried out for an idealised one-dimensional water column, und

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