Relevant bibliographies by topics / Outer border

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Outer border'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Outer border"

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Lucas, Eliana P., Ichha Khanal, Pedro Gaspar, Georgina C. Fletcher, Cedric Polesello, Nicolas Tapon, and Barry J. Thompson. "The Hippo pathway polarizes the actin cytoskeleton during collective migration of Drosophila border cells." Journal of Cell Biology 201, no. 6 (June 3, 2013): 875–85. http://dx.doi.org/10.1083/jcb.201210073.

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Collective migration of Drosophila border cells depends on a dynamic actin cytoskeleton that is highly polarized such that it concentrates around the outer rim of the migrating cluster of cells. How the actin cytoskeleton becomes polarized in these cells to enable collective movement remains unknown. Here we show that the Hippo signaling pathway links determinants of cell polarity to polarization of the actin cytoskeleton in border cells. Upstream Hippo pathway components localize to contacts between border cells inside the cluster and signal through the Hippo and Warts kinases to polarize actin and promote border cell migration. Phosphorylation of the transcriptional coactivator Yorkie (Yki)/YAP by Warts does not mediate the function of this pathway in promoting border cell migration, but rather provides negative feedback to limit the speed of migration. Instead, Warts phosphorylates and inhibits the actin regulator Ena to activate F-actin Capping protein activity on inner membranes and thereby restricts F-actin polymerization mainly to the outer rim of the migrating cluster.
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Miyamoto, Y., J. L. Coone, V. Ganapathy, and F. H. Leibach. "Distribution and properties of the glycylsarcosine-transport system in rabbit renal proximal tubule. Studies with isolated brush-border-membrane vesicles." Biochemical Journal 249, no. 1 (January 1, 1988): 247–53. http://dx.doi.org/10.1042/bj2490247.

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The distribution and properties of the peptide-transport system in rabbit renal proximal tubule was examined with glycylsarcosine as the substrate and using brush-border-membrane vesicles derived from pars convoluta (outer cortex) and pars recta (outer medulla). The dipeptide was transported into these vesicles against a concentration gradient in the presence of an inward-directed H+ gradient, demonstrating the presence of a H+-coupled peptide-transport system in outer-cortical as well as outer-medullary brush-border membranes. Even though the transport was electrogenic and was energized by a H+ gradient in both membranes, the system was more active in outer medullary membranes than in outer cortical membranes. Kinetic analysis showed that, although the affinity of the transport system for glycylsarcosine was similar in both membrane preparations, the capacity of the system was significantly greater in outer medulla than in outer cortex. In addition, the pH profiles of the peptide-transport systems in these membrane preparations also showed dissimilarities. The greater dipeptide uptake in one membrane vis-à-vis the other may probably be due to the difference in the affinity of the transport system for H+ and/or the difference in peptide/H+ stoichiometry.
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Quamme, G. A. "Effect of pH on Na(+)-dependent phosphate transport in renal outer cortical and outer medullary BBMV." American Journal of Physiology-Renal Physiology 258, no. 2 (February 1, 1990): F356—F363. http://dx.doi.org/10.1152/ajprenal.1990.258.2.f356.

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The influence of pH on sodium-phosphate cotransport was determined in brush-border membrane vesicles (BBMV) isolated from outer cortical and outer medullary tissue of porcine kidneys. Two transport systems are apparent in outer cortical brush-border vesicles, and one process is apparent in outer medullary vesicles at all pH values. The apparent maximum uptake rate (Vmax) of the low-affinity system in outer cortex vesicles decreased from 8.3 +/- 1.7 to 3.2 +/- 0.05 nmol.mg protein-1.min-1 with pH change of 8.0 to 6.0, and the high-affinity process changed from 1.3 +/- 0.2 to 0.1 +/- 0.01 nmol.mg protein-1.min-1. The respective affinity values (Km) also decreased 5.5 +/- 0.9 to 0.6 +/- 0.01 mM and 0.08 +/- 0.005 to 0.01 +/- 0.005 mM, respectively, with acidification. In outer medullary vesicles a decrease in pH diminished the apparent Km, 0.28 +/- 0.03 to 0.02 +/- 0.003 mM, and mean Vmax from 3.0 +/- 0.07 to 0.5 +/- 0.1 nmol.mg protein-1.min-1. The mean KNaD values were 22.1 +/- 4.2 mM in outer cortical vesicles (low-affinity system) and 58.7 +/- 7.2 mM in outer medullary vesicles (high-affinity system) and were not altered by pH, suggesting that H+ does not affect the sodium interactive site. The data suggest that the vesicles prepared from outer cortical and outer medullary tissue possess distinctive sodium-phosphate transporters that are sensitive to external H+ concentrations.
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Jourd'heuil, D., S. Mehta, and J. B. Meddings. "Hemileaflet susceptibility to oxidative damage in the intestinal brush-border membrane." American Journal of Physiology-Gastrointestinal and Liver Physiology 268, no. 2 (February 1, 1995): G260—G269. http://dx.doi.org/10.1152/ajpgi.1995.268.2.g260.

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Oxidation of biological membranes is characteristic of many types of tissue injury, including those observed with inflammatory bowel disease. The lipid compositions of the inner and outer leaflets of biological membranes differ significantly, making one leaflet theoretically more susceptible to oxidative stress than the other. In this study, we evaluated the susceptibility of each membrane hemileaflet for peroxyl radical-mediated oxidation. In vitro peroxidation of intestinal brush-border membrane was initiated with the peroxyl radical-generator 2,2'-azobis-(2-amidinopropane)hydrochloric acid (AAPH). Oxidation events were monitored by following the oxidation-sensitive degradation of the lipid-soluble fluorescent probe cis-parinaric acid (PnA). The degradation patterns were clearly distinct in the inner and outer hemileaflet. PnA degradation in the inner hemileaflet was consistent with a slow first-order reaction, whereas degradation in the outer leaflet appeared as two first-order processes delayed in time. The results suggest that the sum of available antioxidants and endogenous substrates for oxidation are consumed more rapidly in the outer membrane hemileaflet, making this leaflet more susceptible to peroxidation compared with the cytofacial leaflet.
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Wennemers, Sander. "De Mauritslinie langs de IJssel." Tijdschrift voor Historische Geografie 6, no. 3 (January 1, 2021): 282–305. http://dx.doi.org/10.5117/thg2021.3.004.wenn.

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Abstract The Mauritsline on the IJssel border. A cultural-historical structure in the present landscape At the end of the 16th century the Dutch Republic formed its outer borders alongside the major rivers. Prince Maurits instigated the build of 26 defensive structures (schansen, redoubts) on the IJssel border. Due to a lack of documentation, little is known of the location and the remains of these structures. This article is a first step to start to locate these former border posts. A list with a description of the locations was the starting point. Old maps, aerial photos and landscape biotopes were used to locate the redoubts. After the location of the structures this article proposes to develop a cultural-historical experience of the former ‘Maurits IJssellinie’, which can be done in several ways. It is an important story in the history of the beginning of the Dutch Republic.
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Heegaard, Einar. "The outer border and central border for species–environmental relationships estimated by non-parametric generalised additive models." Ecological Modelling 157, no. 2-3 (November 2002): 131–39. http://dx.doi.org/10.1016/s0304-3800(02)00191-6.

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Quamme, G. A., J. J. Walker, and T. S. Yan. "pH gradient-stimulated phosphate transport in outer medullary brush-border membranes." American Journal of Physiology-Renal Physiology 257, no. 4 (October 1, 1989): F639—F648. http://dx.doi.org/10.1152/ajprenal.1989.257.4.f639.

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Phosphate transport was studied in brush-border membrane vesicles prepared from outer medullary tissue of the porcine kidney. Phosphate uptake studies were performed in the absence of sodium at 21 degrees C. A 1.2- to 12-fold overshoot, above equilibrium values, was present with intracellular pH (pHin) equal to 8.0 and extracellular pH (pHout) equal to 6.5, which was not evident at pHin = pHout. Concentration-dependence of the pH-stimulate uptake was determined by the difference of uptake in the absence of a pH gradient (pHin = pHout) from that in the presence of a pH gradient over a large range of phosphate concentrations. The uptake was consistent with a single facilitative system characterized by apparent kinetic parameters; with Michaelis constant 149 +/- 11 microM and maximal velocity 4.9 +/- 0.4 nmol.mg protein-1.min-1, n = 3. Phosphate uptake was inhibited by the stilbene derivative 4,4'-diisothiocyanostilbene-2,2'-disulfonic acid with a mean inhibition constant (Ki) value of 0.15 mM (n = 2). In addition, pH gradient-stimulated phosphate uptake was sensitive to furosemide and bumetanide; Ki values of 0.50 +/- 0.05 and 0.11 +/- 0.04 mM, respectively. Arsenate (1 mM) and phosphonoformate (1 mM) inhibited pH-dependent phosphate uptake, whereas sulfate (5 mM), bicarbonate (25 mM), and chloride (100 mM) were without effect, indicating that the transport system is relatively specific to phosphate and its close analogues. pH gradient-stimulated phosphate uptake was not influenced by potassium-diffusional gradients. The data provide evidence for a facilitative process in brush-border membrane vesicles isolated from outer medullary tissue of the pig kidney that is capable of transporting phosphate in the absence of sodium.
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Montorio, Daniela, Chiara Giuffrè, Elisabetta Miserocchi, Giulio Modorati, Riccardo Sacconi, Stefano Mercuri, Lea Querques, Giuseppe Querques, and Francesco Bandello. "Swept-source optical coherence tomography angiography in serpiginous choroiditis." British Journal of Ophthalmology 102, no. 7 (October 5, 2017): 991–95. http://dx.doi.org/10.1136/bjophthalmol-2017-310989.

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Background/AimsTo analyse choroidal vascular density of affected and non-affected areas in active and inactive serpiginouschoroiditis (SC) by means of optical coherence tomography angiography (OCT-A).MethodsIn this cross-sectional and observational study, 22 eyes of 11 patients diagnosed with SC were included. All patients underwent blue-light fundus autofluorescence (spectralis Heidelberg retinalangiography+OCT) and swept-source OCT-A (AngioPlex Elite 9000 SS-OCT, Carl Zeiss Meditech) to analyse qualitative features and choroidal vessel density of areas considered affected, and the inner and the outer border of the lesions. Unaffected areas of otherwise healthy retina have also been studied.ResultsAll inactive inflammatory lesions were characterised by atrophy of choriocapillaris with an impairment of its detectable flow and greater visibility of choroidal vessels. On the other hand, all active inflammatory lesions showed an area of complete absence of decorrelation signal. The pathological border was characterised by a statistically significant lower choroidal vessel density compared with both the outer border and the unaffected area (0.650±0.113 vs 0.698±0.112, (p<0.001)). Although not statistically significant, vessel density of the outer border of inactive lesions was lower than vessel density of unaffected areas (0.650±0.113 vs 0.698±0.112, p=0.441). Active inflammatory lesions showed an area of complete absence of decorrelation signal at the level of the choriocapillaris and whole choroid.ConclusionOCT-A represents a new imaging technique that provides useful information about the leading changes of choroidal vascular network in active and inactive lesions of SC.
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Milhiet, Pierre Emmanuel, Chantal Domec, Marie-Cécile Giocondi, Nicole Van Mau, Frédéric Heitz, and Christian Le Grimellec. "Domain Formation in Models of the Renal Brush Border Membrane Outer Leaflet." Biophysical Journal 81, no. 1 (July 2001): 547–55. http://dx.doi.org/10.1016/s0006-3495(01)75721-9.

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Fukuhara, Y., and R. J. Turner. "Cation dependence of renal outer cortical brush border membrane L-glutamate transport." American Journal of Physiology-Renal Physiology 248, no. 6 (June 1, 1985): F869—F875. http://dx.doi.org/10.1152/ajprenal.1985.248.6.f869.

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The cation dependence of L-glutamate transport in renal outer cortical brush border membrane vesicles was studied. Both cis sodium and trans potassium were required for optimal L-glutamate flux. Relative to simultaneous sodium (out greater than in) and potassium (in greater than out) gradient conditions, flux was reduced 50-fold by potassium removal and more than 100-fold by sodium removal. The effect of potassium removal in this preparation was markedly larger than that observed in other renal brush border membrane preparations. No other monovalent cation tested was effective in replacing sodium. However, Rb+ and Cs+ and to a lesser degree NH+4 were found to be effective potassium substitutes. Kinetic analysis of the Na/K-dependent component of L-glutamate flux indicated a single transport system of Km = 13 microM and Vmax = 1.3 nmol X min-1 X mg protein-1. Studies of the dependence of L-glutamate flux on potassium and sodium concentrations yielded Hill coefficients of 0.9 and 1.9, respectively, consistent with involvement of one potassium ion and two or more sodium ions in the L-glutamate transport event. Efflux studies indicated that sodium and potassium act at different steps in the transport cycle, sodium to facilitate the translocation of the glutamate-carrier complex, and potassium to facilitate the return of the unloaded carrier. A model for renal Na/K-dependent L-glutamate transport is suggested on the basis of these results.
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Dissertations / Theses on the topic "Outer border"

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Milazzo, Anthony Joseph. "STRUCTURAL AND ARCHITECTURAL PATTERNS OF ASCENDING VASA RECTA BETWEEN THE INNER AND OUTER MEDULLARY BORDER OF THE MUNICH-WISTAR RAT KIDNEY." Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/192545.

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Chang, Shang-Te, and 張尚德. "Comparative Analysis of Outer Border Fund Performance-An Example of 4433 Screening Method." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/45405678241493538310.

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碩士
樹德科技大學
金融系碩士班
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This study aims at exploring the fund’s 4433 screening method and annual achievements through confirmation study method, making use of outer border funds, collected and sold within the country, with approval of the agency in charge or declared effective, evaluating their advantages and disadvantages and furthermore offering them for investors’ reference. The 4433 method is based on experience and short-term (one year),mid-term (2-3 years), and long-term(5 years) achievements to judge a fund’s effectiveness. As for confirmation study, it uses 4433 method to select fund samples from the fund market. The selected fund samples shall be added, based on the annual compensation rate of each various type, and divided by its quantity (n) to obtain the average compensation rate of that type of fund, and analyze and explore the fund holding length of time, such as short-term, mid-term, and long term. Finally with the result of confirmation analysis, we come to the conclusion and suggestions of this study, and offer them as reference to outer border fund market investors for selecting their funds. The empirical results excellent of rate of return on investment in the region are mostly funds relaxed area. Annual rate of return is the merit of the quantitative easing (referred to as QE) for the year. Capital of kinetic energy is really stock of kinetic energy. Now the end of six years of US monetary stimulus. In recent years, creating a high rate of return on Investment goods. Improve their economic growth trend. Fed in exchange for the normalization of monetary policy space. US interest rates are determined by the trend. When interest rates? How fast? Still a test of the US authorities. It affects the investment climate worldwide. In addition to the United States. Major central banks still overweight monetary easing. Kinetic energy no shortage of global capital. The economy is expanding. Continue to support the performance of risky assets. The Bank of Japan without warning expand QE. China''s central bank cut interest rates several times and increase financial intermediation. The two governments sought apparent maintenance of stability and structural reforms in the economy continued commitment to take forward. The European Central Bank finally in March 2015 to open a printing press. Recent European stocks rebounded sharply indeed be motivated. Market investor confidence warmed. Next should be closely observed. In the policy to stimulate the European economy and corporate earnings growth if the substance. Investors may also be waiting in the wings to catch this train European QE funds Quotes.
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Burda, Tomáš. "Význam změn správních hranic v procesu formování vnitřních periferií na území Česka od poloviny 19. století." Doctoral thesis, 2014. http://www.nusl.cz/ntk/nusl-338082.

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The dissertation thesis covers the theme of the relationships between the changes of administrative borders and the peripheriality of space on the territory of Czechia since the mid-19th century. The author first defines the fundamental objectives and discusses the bases of the research of changes of administrative borders in Czechia in the process of polarization of space, as well as the general background and approaches to the issue of borders and regions, while emphasizing the concept of inner peripheries and internal borderland. The thesis attempts to contribute to the debate regarding: the importance of administrative borders of regions of different scales in the polarization of space; identification, analysis and evaluation of areas that changed their administrative affiliation at the level of mesoregions (regions) and microregions (districts) on the territory of Bohemia and the Vysočina Region in particular; evaluation of the degree of stability of administrative regions and stability of centers of these regions; and to assessment of the importance of the borders of regions in the context of problems associated with the development of peripheries. Discussion of changes in administrative borders and related development of territorial administration and local government places focuses on the...
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Book chapters on the topic "Outer border"

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Liang, Z., C. Duan, D. Gu, and H. Lu. "Extracting the Inner and Outer Borders of Bladder Wall and Flattening the Extracted Wall for MR Cystography." In IFMBE Proceedings, 322–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03904-1_90.

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Thomas, Greg. "Off-Concrete." In Border Blurs, 115–58. Liverpool University Press, 2019. http://dx.doi.org/10.3828/liverpool/9781789620269.003.0004.

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The Glaswegian poet Edwin Morgan coined the term ‘off-concrete’ to describe one of his own concrete poems. In this chapter, the term is used to characterise his overall approach to the style, which expressed both a keen enthusiasm for the classical concrete poetry of the 1950s-60s and a pronounced scepticism regarding its formal and ideological limits. One of many styles with which Morgan experimented during the 1950s-70s – also including beat and sci-fi poetry – concrete poetry was a means both of expressing his opposition to the parochialism of Scottish literary modernist culture and of redefining that culture as internationalist and technologically oriented. At the same time, Morgan’s incorporation of narrative voices and specific thematic scenarios into the concrete poem – ranging from outer space to the animal kingdom, and periodically expressing Scottish-nationalist and anti-colonialist politics – reflects his desire to extend and subvert the grammars of concrete poetry. This dialectical movement propelled his concrete practice forwards from 1962 until around the close of the 1960s, by which time his engagement with the style was waning. However, by the 1970s, a new variant of concrete poetry, more responsive to sound poetry and new Scottish poetry in dialect, had begun to animate Morgan’s practice.
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Wulung, S. R. P., A. K. Yuliawati, and M. S. D. Hadian. "Border tourism in Indonesia’s outer islands: The case of Sebatik Island." In Promoting Creative Tourism: Current Issues in Tourism Research, 102–9. Routledge, 2021. http://dx.doi.org/10.1201/9781003095484-16.

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Cheng, T. J. "Facing Russia and Outer Mongolia: Border City Hulunbeier in the 1960s and the 2000s." In China's Policies on Its Borderlands and the International Implications, 93–115. WORLD SCIENTIFIC, 2010. http://dx.doi.org/10.1142/9789814287678_0005.

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Wells, Peter S. "Cross-Frontier Interactions in Roman Europe, AD 100–350." In Modeling Cross-Cultural Interaction in Ancient Borderlands. University Press of Florida, 2018. http://dx.doi.org/10.5744/florida/9780813056883.003.0002.

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Following the Roman conquests in Europe west of the Rhine River in the 50s BC and south of the Danube in 15 BC, a frontier zone was established that was to endure for 500 years. Written sources yield limited information about interaction through merchant ventures and diplomatic missions. But archaeological evidence provides a vast amount of data about the geography, character, scale, and chronology of interactions between individuals and communities on the two sides of the border. Using the Cross-Cultural Interaction Model, this paper explores the evidence for interaction in four identifiable zones ranging from Roman bases on the edge of the empire through a frontier region and an outer rim to new centers established far beyond the imperial boundaries.
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Channa, Subhadra Mitra. "A People on the Borders." In The Inner and Outer Selves, 250–81. Oxford University Press, 2013. http://dx.doi.org/10.1093/acprof:oso/9780198079422.003.0008.

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Ahram, Ariel I. "Southern Yemen." In Break all the Borders, 95–120. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190917371.003.0004.

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Chapter 4 looks at the Southern Movement (SM) in Yemen. As in Libya, the Southern Movement took advantage of the ouster of a dictatorship and the crumbling of an already weak central government. The Yemen civil war, which erupted as Houthi forces from the north stormed Sana’a, gave the SM a new opportunity to take control in the south. The SM claimed the once-independent South Yemen as its direct forebear. There was disagreement within the SM about whether to seek outright secession or accept federalist devolution. Various factions within the SM vied for control over Yemen’s oil deposits and ports. The SM tried to win international support, particularly from Saudi Arabia and the United Arab Emirates, claiming that it could be a force for stability.
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Dickens, Charles. "Chapter III: The Same Respected Friend in More Aspects than One." In Our Mutual Friend. Oxford University Press, 2008. http://dx.doi.org/10.1093/owc/9780199536252.003.0040.

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In sooth, it is Riderhood and no other, or it is the outer husk and shell of Riderhood and no other, that is borne into Miss Abbey’s first-floor bedroom. Supple to twist and turn as the Rogue has ever been, he is sufficiently rigid...
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Lievin, Marc, Patrice Delmas, Jason James, and Georgy Gimel’farb. "Lip Contour Extraction from Video Sequences under Natural Lighting Conditions." In Visual Speech Recognition, 172–212. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-186-5.ch006.

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An algorithm for lip contour extraction is presented in this chapter. A colour video sequence of a speaker’s face is acquired under natural lighting conditions without any particular set-up, make-up, or markers. The first step is to perform a logarithmic colour transform from RGB to HI colour space. Next, a segmentation algorithm extracts the lip area by combining motion with red hue information into a spatio-temporal neighbourhood. The lip’s region of interest, semantic information, and relevant boundaries points are then automatically extracted. A good estimate of mouth corners sets active contour initialisation close to the boundaries to extract. Finally, a set of adapted active contours use an open form with curvature discontinuities along the mouth corners for the outer lip contours, a line-type open active contour when the mouth is closed, and closed active contours with lip shape constrained pressure balloon forces when the mouth is open. They are initialised with the results of the pre-processing stage. An accurate lip shape with inner and outer borders is then obtained with reliable quality results for various speakers under different acquisition conditions.
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Scott, Sean A. "“Patriotism Will Save Neither You Nor Me”." In Contested Loyalty, 168–97. Fordham University Press, 2018. http://dx.doi.org/10.5422/fordham/9780823279753.003.0007.

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Sean A. Scott’s essay addresses the attitudes of Northern Protestant churches on issues of patriotism and loyalty. Scott examines the 1862 resignation of Presbyterian minister William S. Plumer whose Allegheny City, Pennsylvania congregation judged his pronouncements to be devoid of patriotic sentiment. Plumer’s was the rare case of a minister who placed strict separation between political and religious spheres. Scott depicts Plumer as a man of true Christian integrity, whose ouster demonstrates the complex impacts of the “politics of loyalty.” Scott’s study offers a counter to a historical consensus that depicts northern clergy as at best pro-war “cheerleaders.” His work offers an instructive case of a minister who fell outside the patriotic, Republican, emancipationist mould. Plumer’s ordeal also illustrates the challenges of clergy in the border-states who faced divided congregations and the scrutiny of civil and military authorities.
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Conference papers on the topic "Outer border"

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Okamoto, Takashi, and Conceic¸a˜o Juana Fortes. "Calculation of the Accelerated Breaking-Roller Propagation Speed and Wave Energy Transfer to the Roller." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-50080.

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Wave breaking has different physics from the potential flow wave motion. The roller model introduced by Svendsen [1] illustrates the separation of the wave motion and the roller. The roller propagation speed, therefore, is a very important factor for the energy calculation of the bore. The wave celerity data collected at the wave tank displays that the maximum roller propagation speed occurs when the wave has already decayed due to the breaking. This fact clearly displays that the bore energy cannot be calculated only from the wave height as it is done for non-breaking waves. It is certain that most the energy is dissipated through the roller formation in the outer surfzone, but a certain amount of energy is transferred to the roller at the same time and it accelerates the bore speed. Slow decay of the roller propagation speed indicates that the excess energy left in the roller dissipates in the inner surfzone at much slower rate than in the outer surfzone. Therefore, these two zones have to be clearly separated, but the amount of energy transferred into the roller is unknown. In this paper, we focus on the examination of the peak roller propagation speed that appears at the border of the outer and the inner surfzone by using the experimental data collected at the wave tank. In that way, the initial condition of roller propagation speed can be determined for the inner surfzone. The energy conservation between the wave motion and the roller kinetic energy derives an equation to calculate the roller propagation speed. The energy transfer rate is estimated by adjusting the value given by the full energy conversion with the observed roller propagation speed. It is found that about half of the energy is transferred into the roller. The model successfully illustrates the peak bore propagation speed which existing formulae cannot explain.
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Jiménez Castillo, Pedro, and Francisco J. Muñoz López. "La transformación del ḥiṣn andalusí de Ṭaybāliya en un castillo san-tiaguista de frontera." In FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11474.

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The transformation of the Andalusian fortress of Taibilla into a feudal border castleIn this paper, we will study the fortress of Taibilla, a defensive complex built by the Order of Santiago in the middle of the thirteenth century in a strategic point of the Sierra de Segura, currently belonging to the municipality of Nerpio (Albacete). Although the complex was built at the top of the hill on whose hillside a relatively important town existed in Andalusian times, the archaeological excavations proved that most of the remains of the fortification currently visible were built after the Christian conquest. It is a stately castle and the outer enclosure that protected the Christian town, both of notable importance since they were destined to accommodate a comendador and a council respectively. The Encomienda de Taibilla, however, disappeared within a few years due to the avatars of the border, leaving its territory incorporated to that of Yeste. For this reason, the fortress of Taibilla hardly underwent modifications in the medieval period, so that it has been fossilized as an excellent example of the santiaguista stately architecture of the middle of the thirteenth century.
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Stampa, Cleyton S., Angela O. Nieckele, and Sergio L. Braga. "A Numerical Parametric Study of the Growth of Ice Formation Around a Vertical Tube, During the Full Charging Process of an Indirect, Area-Constrained, Ice-on-Pipe Storage Tank." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47423.

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A parametric numerical investigation regarding the ice layer growth outside a vertical tube is investigated. It encompasses heat transfer and removal of energy, applicable to indirect, area-constrained, ice-on-pipe storage tanks. The study is carried out in a vertical annulus, with the inner vertical wall representing one of the tubes packed into a typical storage tank. Further, the outer vertical wall determines the maximum border for the ice layer growth under the conditions established in the present study, corresponding to a full charging process in such devices. Our task is to provide helpful qualitative results for the investigation of ice storage tank heat transfer performance, considering changes in the following parameters: aspect ratio, radius ratio, Grashof and Stefan numbers. For the mathematical model adopted to simulate transient natural convection of water with phase-change (solidification), it was utilized a model based on the finite volume method to solve the set of coupled conservation equations of mass, momentum and energy.
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Chen, Y. N., U. Seidel, U. Haupt, and M. Rautenberg. "The Vortex Behaviour of the Rotating-Stall Cell of a Centrifugal Compressor With Vaned Diffuser." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-066.

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The aerodynamic behaviour of the rotating-stall cell of a centrifugal compressor with radial blading and vaned diffuser is investigated experimentally using two stagnation pressure transducers located parallel to each other on the opposing walls of the semi-vaneless annular space between the impeller and the diffuser. The transducers are turned simultaneously step by step through an angle of 360° during the measurement, so that the flow field of both the forward and reverse flows and the swirl flow components can be detected in the stalled and the unstalled regions. It was shown in the previous papers of the authors (1991 b) that the jet and wake in the flow of the blade channel in the normal operating range are cores of longitudinal vortices with opposite rotational sense. During rotating stall, the jet of a blade channel bends over the outlet edge of the blade and is converted into the wake of the neighbouring one to form a vortex loop around the blade in question. The swirling speed of this vortex loop (the vorticity) is measured to be about twice impeller speed for the present case. The vortex loops of the adjacent blades then join together to form a bubble, the stall cell, embodying the region of the stalled blades. The outer reach of the vortex bubble forms the border of the outer lobe of the Rossby waves associated with the vortex pair “high” (H) and “low” (L) guiding the stall cell. The longitudinal-vortex-nature of the jet stream along the flank of the Rossby wave, as determined recently in a vaneless diffuser by the authors (1991a), is confirmed in the present investigation. Its intensity reaches a velocity of about 20% u2 when measured in the absolute frame, or 120% u2 when measured in the rotating impeller frame, superimposed by a swirling component of (1 to 4) x ωimp (u2 = tangential velocity of the impeller outlet. ωimp = angular velocity of the impeller).
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5

Zhu, Yuliang, Chencheng Xu, and Xiaoyan Wei. "Impacts of Waterway Regulation Engineering on Saltwater Intrusion in the Modaomen Estuary." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83741.

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A large-scale waterway regulation project, which is the main approach for people to manage coastal and estuary area will be imperative due to the high-speed economic development in Guangdong Province. The project will change the topography in the estuary region and influence the hydrodynamic conditions there. The Modaomen waterway, as the main access to the sea of Xijiang River, plays a key role in connecting outer sea. During recent years, a remarkable deterioration of tide intrusion occurred resulting in negative effect on water resource utilization in industry, agriculture and local people’s lives and therefore it is of great significance to study on the tide intrusion caused by dredging project. This paper analyses measured Modaomen hydrological data and exhibits the temporal and spatial distribution of salinity and characteristics of fresh and salinity water mixing, as well as the correlation between salinity, water level and suspended sediment concentration in the Modaomen region. Based on the establishment of high-precision three-dimensional salinity mathematical model in Modaomen region, this paper calculates various engineering plans and examines the changes of flow field and tidal saltwater intrusion, which provides elementary base for implementation of the waterway regulation engineering. During the process of calculation, the terrain, the border and validation data that adopted in this paper is relatively new and have high reliability. The study indicates that the salinity degree has a merely minor increase after projects indeed in the estuary to provide situation for tide intrusion. However, the influence is little and it fails to be the chief reasons responsible for the depravation of tide intrusion in the Modaomen estuary recent years.
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6

Adamczuk, Rafael R., and Joerg R. Seume. "Numerical Evaluation of the Condition of a Jet Engine Through Exhaust Jet Analysis." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56947.

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The present work numerically investigates the influences that four defects in the hot gas path of a civil aircraft engine have on the density distribution of the exhaust jet. The defects detectability with tomographic measurements using the Background-oriented schlieren method (BOS) is evaluated in order to draw conclusions on the condition of the engine before disassembly. The modeled defects are: the variation of the radial gap between the rotor blade tip and the casing in the second stage of a high-pressure turbine (HPT), the burning of the trailing edge of the stator vanes and rotor blades of the second stage of the HPT, the variation of the cooling air mass flow in the first stage of the HPT, and the variation of the temperature at the outlet of the combustion chamber. Synthetic measurements show that a characteristic signature at the outer border of the core mass flow in the exhaust jet can be measured with BOS when the radial gap is varied. However, the burning of the trailing edges cannot be detected. The variation of the cooling air massflow affects the entire density distribution and can be measured with BOS. Defects of the burner nozzles affect a larger local area of the exhaust jet and thus can also clearly be identified with BOS. The results show that different defects in the hot gas path result in characteristic signatures in the density distribution of the exhaust jet and that they can be measured with BOS. It is thus possible to detect defects in the hot gas path with BOS before the disassembly of the engine.
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7

Chen, Y. N., D. Hagelstein, I. Kassens, U. Haupt, and M. Rautenberg. "Effect of the Decaying Overshoot of the Rankine Vortex on the Axial Flow Field Behind the Inlet Guide Vane of Centrifugal Compressors." In ASME Turbo Expo 2000: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/2000-gt-0427.

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The present analysis of the experimental results obtained by Kassens (1997), and Kassens and Rautenberg (1998) about the variation of the axial velocity profile of the rotating flow travelling downstream the inlet guide vane revealed the controlling effect of the decaying overshoot of the Rankine vortex in this process. The disappearance of the overshoot indicates the stop of its excessive drive on the rotating flow. It will be shown that this decay process is directly connected to the braking effect of the impeller blades on the rotating flow generated by the IGV. For the case of an IGV setting angle of 60°, the flow with a very strong swirl component generated by the IGV outlet cannot be admitted by the inlet of the impeller without shock. This shock acts as a braking force of the impeller blades on the swirl component of the approaching flow, a process that is expressed as the spin-down of the swirling flow. A secondary toroidal ring vortex in the frontal zone of the impeller will be generated by the fundamental flow. The recirculation velocity of this toroidal ring vortex has an axial component, which directs towards the impeller in the outer zone of the suction duct, but turns away from the impeller in its central zone. At the same time, the field of the uniform tangential velocity of the IGV outlet is getting into the influence sphere of the spin-down mentioned. As a consequence, it will be converted into the flow field of a potential vortex, which is accompanied by a field of axial velocity having a normal value uniformly distributed in its outer potential zone and a strongly peaked value over its central core. This process is similar to that of the flow field in a bathtub vortex during draining its fluid out of the central pipe. The new flow field consists of a secondary toroidal ring vortex superimposed on the fundamental flow. The rotating sense of this new toroidal ring vortex is just opposite to that formed in front of the impeller. We then have a pair of toroidal ring vortices staying one behind another between the IGV outlet and the impeller inlet. Each member of the pairs serves as the border for the other one. It can thus be concluded that the pair is induced simultaneously by the spin-down of the swirling flow of the IGV outlet brought about by the braking effect of the impeller blades.
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8

Halvorsen, Helge, Eirik Enerstvedt, and Øyvind Sundem. "Small Outer Diameter, Big Bore Permanent Straddle System." In SPE/ICoTA Coiled Tubing Conference and Exhibition. Society of Petroleum Engineers, 2004. http://dx.doi.org/10.2118/89659-ms.

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9

Abdelsalam, Ossama R., and Ramin Sedaghati. "Outer Surface Prior to Inner Surface Double Autofrettage Technique for a Compound Cylinder." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97035.

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The autofrettage and shrink-fit processes are used to enhance the load carrying capacity and fatigue life of the pressure vessels. Previous works were mainly concerned with increasing the compressive residual stress at the near bore area of the compound cylinders, ignoring the harmful high tensile residual stress developed at the outer part of the cylinder. Also, the idea of multiple or re-autofrettage had been only used at the inner surface of the cylinder to increase the magnitude of compressive residual stress at the near bore area. In this study, a new design approach is proposed by applying an autofrettage cycle on the external surface of the cylinder prior to an autofrettage cycle on the internal surface of the cylinder. It is shown that this double autofrettage cycle not only increases the magnitude of compressive residual stress at the near bore area but also decreases the tensile residual stress at the near outer surface area. Moreover, the proposed double autofrettage process has been combined with shrink-fit and standard inner surface autofrettage processes to produce new combinations of a two-layer compound cylinder. The fatigue life for these new combinations has been evaluated to verify the improvement while using the double autofrettage process.
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Mohammadi, M., G. H. Farrahi, and S. H. Hoseini. "Determination of Residual Stresses in Autofrettaged Compound Tubes for Different Geometries." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26628.

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In this paper, using numerical solutions of bore and outer radius hoop residual stresses in various tube geometries for autofrettage prior to shrink fit and shrink fit prior to autofrettage design are investigated, and the results are compared with monobloc autofrettaged and shrunk fit tubes. Both of the former compound tubes induce more compressive bore hoop residual stresses than a monobloc autofrettage and shrunk fit case. Furthermore, in geometries in which maximum bore hoop residual stresses are induced, the outer radius experiences acceptably low tensile residual stresses. Bore hoop residual stresses increase with increase of tube outer radius; however the rate of increasing decreases.
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