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Artykuły w czasopismach na temat „Cavity growth”

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Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 2 lutego 2022

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1

Schneibel, J. H., i L. Martinez. "Determination of cavity-growth rates from cavity-size distributions". Philosophical Magazine A 54, nr 4 (październik 1986): 489–500. http://dx.doi.org/10.1080/01418618608243607.

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2

Chiche, A., J. Dollhofer i C. Creton. "Cavity growth in soft adhesives". European Physical Journal E 17, nr 4 (4.07.2005): 389–401. http://dx.doi.org/10.1140/epje/i2004-10148-3.

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3

Fan, Zhaofei, Stephen R. Shifley, Martin A. Spetich, Frank R. Thompson i David R. Larsen. "Abundance and Size Distribution of Cavity Trees in Second-Growth and Old-Growth Central Hardwood Forests". Northern Journal of Applied Forestry 22, nr 3 (1.09.2005): 162–69. http://dx.doi.org/10.1093/njaf/22.3.162.

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Abstract In central hardwood forests, mean cavity-tree abundance increases with increasing stand-size class (seedling/sapling, pole, sawtimber, old-growth). However, within a size class, the number of cavity trees is highly variable among 0.1-ha inventory plots. Plots in young stands are most likely to have no cavity trees, but some plots may have more than 50 cavity trees/ha. Plots in old-growth stands often had 25 to 55 cavity trees/ha, but individual plots ranged from 0 to 155/ha. The Weibull probability density function was used to mathematically describe the variation in cavity-tree abundance for plots in stands of differing size (or age) class. A graph of the cumulative probability of cavity-tree abundance is a particularly easy way for managers to estimate the probability that a stand of a given size class will have any specified number of cavity trees per hectare. Results for individual plots or stands can be combined to estimate cavity abundance probabilities for landscapes. Because the results are presented in terms of plot-size classes (or age classes), this approach to cavity tree estimation is compatible with relatively simple forest inventorysystems.North. J. Appl. For. 22(3):162–169.

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4

Fan, Zhaofei, Stephen R. Shifley, Martin A. Spetich, Frank R. Thompson III i David R. Larsen. "Distribution of cavity trees in midwestern old-growth and second-growth forests". Canadian Journal of Forest Research 33, nr 8 (1.08.2003): 1481–94. http://dx.doi.org/10.1139/x03-068.

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We used classification and regression tree analysis to determine the primary variables associated with the occurrence of cavity trees and the hierarchical structure among those variables. We applied that information to develop logistic models predicting cavity tree probability as a function of diameter, species group, and decay class. Inventories of cavity abundance in old-growth hardwood forests in Missouri, Illinois, and Indiana found that 811% of snags had at least one visible cavity (as visually detected from the ground; smallest opening [Formula: see text]2 cm diameter), about twice the percentage for live trees. Five percent of live trees and snags had cavities on mature ([Formula: see text]110 years) second-growth plots on timberland in Missouri. Because snags accounted for typically no more than 10% of standing trees on any of these sites, 8085% of cavity trees are living trees. Within the subset of mature and old-growth forests, the presence of cavities was strongly related to tree diameter. Classification and regression tree models indicated that 30 cm diameter at breast height (DBH) was a threshold size useful in distinguishing cavity trees from noncavity trees in the old-growth sample. There were two diameter thresholds in the mature second-growth sample: 18 and 44 cm DBH. Cavity tree probability differed by species group and increased with increasing decay class.

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5

Chokshi, Atul H. "Cavity nucleation and growth in superplasticity". Materials Science and Engineering: A 410-411 (listopad 2005): 95–99. http://dx.doi.org/10.1016/j.msea.2005.08.069.

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6

Wåhlander, Martin, Petra M. Hansson-Mille i Agne Swerin. "Superhydrophobicity: Cavity growth and wetting transition". Journal of Colloid and Interface Science 448 (czerwiec 2015): 482–91. http://dx.doi.org/10.1016/j.jcis.2015.02.054.

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7

Tvergaard, Viggo. "Interface failure by cavity growth to coalescence". International Journal of Mechanical Sciences 42, nr 2 (luty 2000): 381–95. http://dx.doi.org/10.1016/s0020-7403(98)00128-3.

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8

Murphy, Jeremiah G., i Shiro Biwa. "Nonmonotonic cavity growth in finite, compressible elasticity". International Journal of Solids and Structures 34, nr 29 (październik 1997): 3859–72. http://dx.doi.org/10.1016/s0020-7683(96)00237-5.

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9

Neudeck, G. W., J. Denton, J. Qi, J. D. Schaub, R. Li i J. C. Camprbell. "Selective epitaxial growth Si resonant-cavity photodetector". IEEE Photonics Technology Letters 10, nr 1 (styczeń 1998): 129–31. http://dx.doi.org/10.1109/68.651135.

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10

Perryman, L. J., i P. J. Goodhew. "Cavity growth mechanism maps for reactor materials". Journal of Nuclear Materials 165, nr 2 (maj 1989): 110–21. http://dx.doi.org/10.1016/0022-3115(89)90239-0.

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11

Chan, K. S., i R. A. Page. "Transient cavity growth in ceramics under compression". Journal of Materials Science 27, nr 6 (marzec 1992): 1651–58. http://dx.doi.org/10.1007/bf00542929.

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12

Xinggang, Jiang, Cui Jianzhong i Ma Longxiang. "A simple formula for cavity growth rate considering cavity interlinkage during superplastic deformation". Materials Science and Engineering: A 174, nr 1 (styczeń 1994): L9—L11. http://dx.doi.org/10.1016/0921-5093(94)91122-3.

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13

Yu, Yan Dong, De Liang Yin i Bao You Zhang. "Study on Cavity Growth in Uniaxial Tension of ZK60 Magnesium Alloy". Key Engineering Materials 353-358 (wrzesień 2007): 687–90. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.687.

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Cavity growth is a typical microstructure feature in superplastic forming (SPF) of materials. Substantial growth and interlink of cavities in superplastic deformation usually lead to reduction in elongation, even to failure. Consequently, it is necessary to investigate the mechanism and model of cavity growth. In this paper, experimental studies on cavity growth were carried out by means of superplastic tension of ZK60 magnesium alloys. Scanning electronic microscope (SEM) was employed for observation of fractography. Experimental cavity radius and volume fraction were determined by optical microscopy and corresponding picture-based analysis software. It is found that, the fractured surfaces after a superplastic elongation have a mixed characteristic of intergranular cavities and dimples. Further, the cavity growth is identified to follow a exponentially increasing mode.

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14

Otsu, Takefumi, Romeo Glovnea i Joichi Sugimura. "Cavitation Growth Phenomena in Pure-Sliding Grease EHD Contacts". Lubricants 6, nr 3 (22.08.2018): 75. http://dx.doi.org/10.3390/lubricants6030075.

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This article describes experimental and theoretical studies on the cavitation phenomena in the grease lubrication film under pure sliding elastohydrodynamic contact. In situ observation tests using the optical interferometry technique were conducted, and the growth of cavitation was captured using a high-speed camera. The results showed that the cavity grew in two stages, which was similar to the behavior in the base oil, and that the cavity growth rate in the initial stage was higher than that in the second stage. In the initial stage, the cavity growth time in the grease was longer than that in the base oil, and the cavity length after the growth depended on the base oil viscosity. It was also found in the test using diurea grease that small cavities were formed by the lumps of thickener. The cavity growth in the initial stage was discussed by numerical simulation of pressure distribution based on a simple rheological model.

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15

Kitamura, Takayuki, Ryuichi Ohtani, Tetsuya Yamanaka i Yoshiaki Hattori. "Cavity Growth in Coble Creep of Polycrystalline Materials and Transition from Cavity to Crack." Transactions of the Japan Society of Mechanical Engineers Series A 60, nr 572 (1994): 935–41. http://dx.doi.org/10.1299/kikaia.60.935.

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16

He, Junjing, i Rolf Sandström. "Creep cavity growth models for austenitic stainless steels". Materials Science and Engineering: A 674 (wrzesień 2016): 328–34. http://dx.doi.org/10.1016/j.msea.2016.08.005.

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17

Delbos, Aline, Jun Cui, Sami Fakhouri i Alfred J. Crosby. "Cavity growth in a triblock copolymer polymer gel". Soft Matter 8, nr 31 (2012): 8204. http://dx.doi.org/10.1039/c2sm25458a.

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18

Balicki, R., S. Z. Grabowska i A. Citko. "Salivary epidermal growth factor in oral cavity cancer". Oral Oncology 41, nr 1 (styczeń 2005): 48–55. http://dx.doi.org/10.1016/j.oraloncology.2004.06.004.

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19

KOJIMA, Naoki, Yoshinobu MOTOHASHI i Stefanus HARJO. "Cavity Growth in 3Y-TZP during Superplastic Deformation". Proceedings of Ibaraki District Conference 2002 (2002): 119–20. http://dx.doi.org/10.1299/jsmeibaraki.2002.119.

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20

Ma, Yan, i Terence G. Langdon. "Observations on diffusional cavity growth in superplastic materials". Scripta Metallurgica et Materialia 26, nr 8 (kwiecień 1992): 1239–44. http://dx.doi.org/10.1016/0956-716x(92)90570-5.

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21

Marino, B., F. Mudry i A. Pineau. "Experimental study of cavity growth in ductile rupture". Engineering Fracture Mechanics 22, nr 6 (styczeń 1985): 989–96. http://dx.doi.org/10.1016/0013-7944(85)90038-4.

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22

Chokshi, Atul H., i Terence G. Langdon. "A model for diffusional cavity growth in superplasticity". Acta Metallurgica 35, nr 5 (maj 1987): 1089–101. http://dx.doi.org/10.1016/0001-6160(87)90056-3.

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23

Abitbol, M. Maurice. "Growth of the fetus in the abdominal cavity". American Journal of Physical Anthropology 91, nr 3 (lipiec 1993): 367–78. http://dx.doi.org/10.1002/ajpa.1330910309.

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24

Dorogin, Leonid M., Maksim V. Dorogov, Sergei Vlassov, Anatoly A. Vikarchuk i Alexey E. Romanov. "Whisker Growth and Cavity Formation at the Microscale". Reviews on advanced materials and technologies 2, nr 1 (2020): 1–31. http://dx.doi.org/10.17586/2687-0568-2020-2-1-1-31.

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25

Leroux, Jean-Baptiste, Jacques Andre´ Astolfi i Jean Yves Billard. "An Experimental Study of Unsteady Partial Cavitation". Journal of Fluids Engineering 126, nr 1 (1.01.2004): 94–101. http://dx.doi.org/10.1115/1.1627835.

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Unsteady partial cavitation can cause damage to hydraulic machinery and understanding it requires knowledge of the basic physics involved. This paper presents the main results of a research program based on wall-pressure measurements aimed at studying unsteadiness in partial cavitation. Several features have been pointed out. For cavity lengths that did not exceed half the foil chord the cavity was stated to be stable. At the cavity closure a peak of pressure fluctuations was recorded originating from local cavity unsteadiness in the closure region at a frequency depending on the cavity length. Conversely, cavities larger than half the foil chord were stated to be unstable. They were characterized by a cavity growth/destabilization cycle settled at a frequency lower than the previous ones. During cavity growth, the closure region fluctuated more and pressure fluctuations traveling in the cavity wake were detected. When the cavity was half the foil chord, cavity growth was slowed down and counterbalanced by large vapor cloud shedding. When the cavity length was maximum (l/c∼0.7–0.8), it was strongly destabilized. The reason for such destabilization is discussed at the end of the paper. It is widely believed that the cavity instability originates from a process involving the shedding of vapor clouds during cavity growth, a re-entrant jet, and a shock wave phenomenon due to the collapse of a large cloud cavitation.

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26

Komatsu, M., S. Isoyama i T. Takishima. "Effects of aging on induction of cardiocyte growth by extracardiac factors". American Journal of Physiology-Heart and Circulatory Physiology 266, nr 6 (1.06.1994): H2279—H2286. http://dx.doi.org/10.1152/ajpheart.1994.266.6.h2279.

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To examine the effect of aging on the induction of cardiac myocyte growth by extracardiac factors, we cultured myocytes obtained from neonates of the same litter and implanted them into the peritoneal cavity of developmental phase (2-mo-old), young adult (7-mo-old), and aged (18-mo-old) host Wistar rats. Hearts obtained from 2- to 4-day-old neonates were dissociated with gentle trypsinization, and cells were seeded in culture wells and inserts. The culture insert (9 mm in diam) has a thin membrane the pore size of which is 0.45 microns. After 24 h of usual extracorporeal incubation in the serum-supplemented medium, the inserts were implanted into the peritoneal cavity of the host rats of the three age groups. Zero, 24, 72, and 96 h after implantation into the peritoneal cavity, the inserts were removed from the peritoneal cavity. Surface area of plated myocytes, diameter, number, protein, and DNA content of the suspended cells were measured. Size, protein content per cell, and protein per DNA of cells implanted into the peritoneal cavity were significantly greater than those cultured in the usual extracorporeal method. Growth of the myocytes cultured in the peritoneal cavity of aged host rats was significantly less compared with that of myocytes implanted in the peritoneal cavity of younger rats. Thus aging attenuates the induction of cardiac myocyte growth by extracardiac factors.

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27

Hayhurst, D. R., J. Lin i R. J. Hayhurst. "Failure in notched tension bars due to high-temperature creep: Interaction between nucleation controlled cavity growth and continuum cavity growth". International Journal of Solids and Structures 45, nr 7-8 (kwiecień 2008): 2233–50. http://dx.doi.org/10.1016/j.ijsolstr.2007.11.026.

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28

Zheng, Zheng, Shubin Zhang, Guoping Yang, Yong Tang, Jerry Baskin, Carol Baskin i Lianyan Yang. "Abundance and distribution of cavity trees in an old-growth subtropical montane evergreen broad-leaved forest". Canadian Journal of Forest Research 39, nr 11 (listopad 2009): 2234–45. http://dx.doi.org/10.1139/x09-149.

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We examined the relationship between the density of cavity trees and forest structure characteristics and explored the occurrence of cavity trees among different tree species and diameter breast height (DBH) size in a subtropical evergreen broad-leaved forest in the Ailao Mountains in southwestern China. Cavity trees accounted for 7.9% of living trees and 16.3% of dead trees. Average density of living cavity trees (86.3 trees·ha–1) was 6.9 times that of dead cavity trees. Density of living cavity trees was positively correlated with the density of living trees. Cavity trees showed a skewed distribution among DBH classes that peaked at DBHs of 20–40 cm. Moreover, the probability that a living tree was cavity-bearing was logistically related to DBH. Overall, the likelihood of trees being cavity-bearing differed significantly among species. The proportions of cavity trees among the 23 species having more than 63 trees were positively related to the average DBH and to the largest DBH recorded for each species. We suggest that (1) living tree density is important in determining density of cavity trees and (2) differences in proportion of living cavity trees among species is caused mostly by differences in average DBH of each species.

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29

Chino, Yasumasa, Hajime Iwasaki i Mamoru Mabuchi. "Cavity growth rate in superplastic 5083 Al and AZ31 Mg alloys". Journal of Materials Research 19, nr 11 (1.11.2004): 3382–88. http://dx.doi.org/10.1557/jmr.2004.0431.

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The plasticity-controlled growth rate of cavities during superplastic deformationwas statistically investigated for 5083 Al alloy and AZ31 Mg alloy. When the cavity growth rate was evaluated on the basis of macroscopic strain calculated using the displacement of the specimen, the growth rate for the Al alloy was larger than thatfor the Mg alloy. However, the growth rate of the Al alloy was in agreement withthat of the Mg alloy when the cavity growth rate was evaluated on the basis of the microscopic strain due to grain boundary sliding. The results obtained lead to two conclusions: (i) the rate of cavity growth is not affected by the kind of materials,that is, the nature of the grain boundary, and (ii) the microscopic strain due to grain boundary sliding should be used to evaluate exactly the rate of cavity growth for superplastic deformation.

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30

Lim, Byeongsoo, i Chanseo Jeong. "Effect of Cavity Growth Rate and Cr on High Temperature Crack Growth in P92 and P122 Steels". International Journal of Modern Physics B 17, nr 08n09 (10.04.2003): 1627–32. http://dx.doi.org/10.1142/s0217979203019423.

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In this work, the velocity of crack propagation at high temperature was investigated with da / dt - C t relationship using recently developed P92 and P122 steels. Role of cavity in crack growth rate and load line displacement rate was studied by measuring the cavity size and density, which will influence crack nucleation and growth. Since temperature and stress changes are particularly important at high temperature, crack growth behavior was evaluated under various temperature and K i(initial stress intensity factor). Effect of Cr content was evaluated by measuring crack growth activation energy in thesis.

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31

Al-Halbouni, Djamil, Eoghan P. Holohan, Abbas Taheri, Robert A. Watson, Ulrich Polom, Martin P. J. Schöpfer, Sacha Emam i Torsten Dahm. "Distinct element geomechanical modelling of the formation of sinkhole clusters within large-scale karstic depressions". Solid Earth 10, nr 4 (29.07.2019): 1219–41. http://dx.doi.org/10.5194/se-10-1219-2019.

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Abstract. The 2-D distinct element method (DEM) code (PFC2D_V5) is used here to simulate the evolution of subsidence-related karst landforms, such as single and clustered sinkholes, and associated larger-scale depressions. Subsurface material in the DEM model is removed progressively to produce an array of cavities; this simulates a network of subsurface groundwater conduits growing by chemical/mechanical erosion. The growth of the cavity array is coupled mechanically to the gravitationally loaded surroundings, such that cavities can grow also in part by material failure at their margins, which in the limit can produce individual collapse sinkholes. Two end-member growth scenarios of the cavity array and their impact on surface subsidence were examined in the models: (1) cavity growth at the same depth level and growth rate; (2) cavity growth at progressively deepening levels with varying growth rates. These growth scenarios are characterised by differing stress patterns across the cavity array and its overburden, which are in turn an important factor for the formation of sinkholes and uvala-like depressions. For growth scenario (1), a stable compression arch is established around the entire cavity array, hindering sinkhole collapse into individual cavities and favouring block-wise, relatively even subsidence across the whole cavity array. In contrast, for growth scenario (2), the stress system is more heterogeneous, such that local stress concentrations exist around individual cavities, leading to stress interactions and local wall/overburden fractures. Consequently, sinkhole collapses occur in individual cavities, which results in uneven, differential subsidence within a larger-scale depression. Depending on material properties of the cavity-hosting material and the overburden, the larger-scale depression forms either by sinkhole coalescence or by widespread subsidence linked geometrically to the entire cavity array. The results from models with growth scenario (2) are in close agreement with surface morphological and subsurface geophysical observations from an evaporite karst area on the eastern shore of the Dead Sea.

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32

Vlahou, Ioanna, i M. Grae Worster. "Ice growth in a spherical cavity of a porous medium". Journal of Glaciology 56, nr 196 (2010): 271–77. http://dx.doi.org/10.3189/002214310791968494.

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AbstractWe consider an idealized problem of a sphere of ice growing symmetrically in a spherical cavity within a porous rock in order to identify and quantify different physical mechanisms that can result in fracturing the rock. We show that if the permeability of the rock is very small then high pressures can develop in the cavity as the water inside it expands on freezing. However, given typical permeabilities of most rocks, the pressure is relieved by flow out of the cavity through the rock pores. When ice fills the cavity, there remains a microscopic film of water separating the ice from the rock, owing to disjoining forces, and these forces can stress the rock and have the potential to fracture it. The elastic pressure in the rock depresses the freezing temperature, which can limit the potential for fracturing. This simple example reveals the important interactions between disjoining forces, elasticity and fluid flow in determining the pressure exerted during freezing of water-saturated cavities in rocks.

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33

Ko, Young Gun, Dong Hyuk Shin i Chong Soo Lee. "Cavitation damage incorporating cavity growth in submicrometer-grained titanium alloy". Journal of Materials Research 24, nr 6 (czerwiec 2009): 2161–65. http://dx.doi.org/10.1557/jmr.2009.0254.

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A study was made to investigate cavity growth behavior during the superplastic deformation of submicrometer-grained titanium alloy and to compare that to cavity growth in a coarse-grained counterpart. A series of tension tests were performed at a temperature of 973 K and a strain rate of 10−4 s−1. Microstructures revealed that both the size and the volume fraction of the cavities obviously decreased as the grain size decreased. Working within the framework provided by creep models for understanding cavity growth behavior, we found the dominant growth mechanism to be superplastic diffusion, which leads to high-tensile ductility in submicrometer-grained titanium alloy.

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34

Zasada, John C. "Embryo growth in Alaskan white spruce seeds". Canadian Journal of Forest Research 18, nr 1 (1.01.1988): 64–67. http://dx.doi.org/10.1139/x88-010.

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Embryo development in white spruce seeds was studied in five stands in interior Alaska. Cones and seeds were collected at 10- to 14-day intervals starting in mid-July and continuing until just before seed dispersal began. Significant differences were found in embryo development between stands, between trees within stands, and between cones within trees. The four stands at lower elevations produced seeds that had embryos filling 95% or more of the embryo cavity; this percentage was significantly higher than the highest elevation stand where embryos filled about 75% of the embryo cavity at the end of the growing season. Relative cotyledon length was generally greater than 25% in the lower elevation stands and slightly less than 20% in the high elevation stand. Although seed collection can be started when embryos fill 75% of the embryo cavity, the results of this and other studies suggest that collecting seeds when embryos are more mature will result in better quality seeds. Air and soil temperatures and soil moisture levels associated with embryo development are presented.

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35

Dimitrijevic, Milovan, Ana Dimitrijevic, Ivan Boricic i Petar Djurkovic. "Dermoid cyst of the oral cavity: A case report". Medical review 71, nr 11-12 (2018): 409–12. http://dx.doi.org/10.2298/mpns1812409d.

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Introduction. Dermoid cysts are benign developmental skin growths that can occur in any part of the body. Dermoid cysts of the head and neck account for 7% of all cysts, and are most frequently located near the lateral aspect of the eyebrow. They are rarely found in the oral cavity, accounting for 0.01% of all oral cavity cysts. Case Report. A 15-years-old patient was referred to our Clinic due to a growth in the mouth. Clinical examination and magnetic resonance imaging showed a clearly demarcated, oval, cystic growth in the midline sublingual region. Intraoral incision, typical for frenectomy, with cyst excision was performed. Histopathological findings suggested a dermoid cyst. Conclusion. Dermoid cysts of the oral cavity are very rare; they grow slowly and when they reach certain dimensions, they interfere with chewing, swallowing, and lead to progressive breathing difficulty. Dermoid cysts should be included in the differential diagnosis of sublingual mass. Magnetic resonance imaging provides complete information about the localization, size, and content of the growth and contributes significantly to the decision on the surgical approach.

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36

Grim, Tomáš, i Peter Samaš. "Growth Performance of Nestling CuckoosCuculus canorusin Cavity Nesting Hosts". Acta Ornithologica 51, nr 2 (grudzień 2016): 175–88. http://dx.doi.org/10.3161/00016454ao2016.51.2.004.

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37

Engelhardt, G., M. Urquidi-Macdonald i D. D. Macdonald. "A simplified method for estimating corrosion cavity growth rates". Corrosion Science 39, nr 3 (marzec 1997): 419–41. http://dx.doi.org/10.1016/s0010-938x(97)86095-7.

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38

Takahashi, Kosuke, Yuichiro Yamagata, Kazuaki Inaba, Kikuo Kishimoto, Shiori Tomioka i Toshio Sugizaki. "Characterization of Tack Strength Based on Cavity-Growth Criterion". Langmuir 32, nr 14 (29.03.2016): 3525–31. http://dx.doi.org/10.1021/acs.langmuir.5b04705.

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39

Ankit, Kumar, i Nishtala Prasad. "Simulation of creep cavity growth in Inconel 718 alloy". Materials Science and Engineering: A 528, nr 12 (maj 2011): 4209–16. http://dx.doi.org/10.1016/j.msea.2011.02.012.

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40

Fabregue, D., O. Bouaziz i E. Maire. "Effect of viscosity on cavity growth in ductile damage". Mechanics of Materials 89 (październik 2015): 169–75. http://dx.doi.org/10.1016/j.mechmat.2015.06.007.

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41

Lin, Y. Y., i C. Y. Hui. "Cavity growth from crack-like defects in soft materials". International Journal of Fracture 126, nr 3 (kwiecień 2004): 205–21. http://dx.doi.org/10.1023/b:frac.0000026510.60747.3a.

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