Academic literature on the topic '360-400'

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Journal articles on the topic "360-400"

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Krüger, K., S. Tegtmeier, and M. Rex. "Variability of residence time in the Tropical Tropopause Layer during Northern Hemisphere winter." Atmospheric Chemistry and Physics 9, no. 18 (September 16, 2009): 6717–25. http://dx.doi.org/10.5194/acp-9-6717-2009.

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Abstract. For the first time the long-term interannual and spatial variability of residence time (τ) is presented for the TTL between 360 K and 400 K potential temperature (~14 to 18 km altitude). The analysis is based on a Lagrangian approach using offline calculated diabatic heating rates as vertical velocities, covering Northern Hemisphere (NH) winters from 1962–2004. The residence time τLCP–400 K, being the duration time of air parcels in the layer between the Lagrangian Cold Point (LCP) and 400 K, varies spatially and is longer (>50 days) over the maritime continent as the LCP is lowest there (<370 K). Comparing three theta layers within the TTL reveals the vertical dependence of τ. We derive a mean duration time of 34 days for 360–380 K (lower TTL), 38 days for 380–400 K (upper TTL) and 70 days for 360–400 K theta layers for the 1962–2001 period. A case analysis reveals that τ is positively skewed for 360–380 K and 380–400 K during La Niña and El Niño Southern Oscillation (ENSO) neutral years. For these cases, ~60% of air parcels travel from 360 K to 380 K within 25 days. There is large interannual variability for τ varying up to ±20% from the long-term mean, with strongest variability seen in the lower part of the TTL. Statistical analysis reveals a significant anti-correlation between the residence time and the extratropical and subtropical wave driving in the lowermost stratosphere.
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Krüger, K., S. Tegtmeier, and M. Rex. "Variability of residence time in the Tropical Tropopause Layer during Northern Hemisphere winter." Atmospheric Chemistry and Physics Discussions 9, no. 3 (May 28, 2009): 12597–614. http://dx.doi.org/10.5194/acpd-9-12597-2009.

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Abstract. For the first time the long-term interannual and spatial variability of residence time (τ) is presented for the TTL between 360 K and 400 K theta (~14 to 18 km altitude). The analysis is based on a Lagrangian approach using offline calculated diabatic heating rates as vertical velocities, covering Northern Hemisphere (NH) winters from 1962–2004. The residence time varies spatially. τ, analysed for the Lagrangian Cold Point (LCP), displays a longer duration time of air parcels between LCP and 400 K over the maritime continent (>50 days), as the LCP tropopause has a minimum over the maritime continent (<370 K theta). Comparing three theta layers within the TTL reveals the vertical dependence of τ. We derive a mean duration time of 34 days for 360–380 K (lower TTL), 38 days for 380–400 K (upper TTL) and 70 days for 360–400 K theta layers for the 1962–2001 period. A case analysis reveals, that τ is positively skewed for 360–380 K and 380–400 K during La Niña and El Niño Southern Oscillation (ENSO) neutral years. For these cases, ~60% of air parcels travel from 360 K to 380 K within 25 days. There is large interannual variability for τ varying up to ±20% from the long-term mean, with strongest variability seen in the lower part of the TTL. The interannual variability is influenced by extratropical and subtropical wave driving. Statistical analysis reveals a significant anti-correlation between the residence time and the extratropical and subtropical wave driving in the lowermost stratosphere.
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Zhang, Junfeng, Yingquan Wu, Li Li, Xiaoxing Wang, Qingde Zhang, Tao Zhang, Yisheng Tan, and Yizhuo Han. "Ti-SBA-15 supported Cu–MgO catalyst for synthesis of isobutyraldehyde from methanol and ethanol." RSC Advances 6, no. 89 (2016): 85940–50. http://dx.doi.org/10.1039/c6ra09379e.

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A IBA yield of 32.7% was achieved at 360 °C on 20C6.5MTS-400 using methanol and ethanol as reactants. The catalyst activity was strongly affected by Cu content on the surface, the interaction of Cu and Mg species, the basicity of the catalysts, etc.
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Maleki, Hossein, Lawrence R. Holland, Gwyn M. Jenkins, R. L. Zimmerman, and Wally Porter. "Maximum heating rates for producing undistorted glassy carbon ware determined by wedge-shaped samples." Journal of Materials Research 11, no. 9 (September 1996): 2368–75. http://dx.doi.org/10.1557/jmr.1996.0300.

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Polymeric carbon artifacts are particularly difficult to make in thick section. Heating rate, temperature, and sample thickness determine the outcome of carbonization of resin leading to a glassy polymeric carbon ware. Using wedge-shaped samples, we found the maximum thickness for various heating rates during gelling (300 K–360 K), curing (360 K–400 K), postcuring (400 K–500 K), and precarbonization (500 K–875 K). Excessive heating rate causes failure. In postcuring the critical heating rate varies inversely as the fifth power of thickness; in precarbonization this varies inversely as the third power of thickness. From thermogravimetric evidence we attribute such failure to low rates of diffusion of gaseous products of reactions occurring within the solid during pyrolysis. Mass spectrometry shows the main gaseous product is water vapor; some carboniferous gases are also evolved during precarbonization. We discuss a diffusion model applicable to any heat-treatment process in which volatile products are removed from solid bodies.
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Park, Jeong-Yong, Il-Hyun Kim, Yang-Il Jung, Hyun-Gil Kim, Dong-Jun Park, and Weon-Ju Kim. "Long-term corrosion behavior of CVD SiC in 360°C water and 400°C steam." Journal of Nuclear Materials 443, no. 1-3 (November 2013): 603–7. http://dx.doi.org/10.1016/j.jnucmat.2013.07.058.

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Torchynska, Tetyana, Brahim El Filali, Georgiy Polupan, and Lyudmula Shcherbyna. "Emission, Defects and Structure of ZnO Nanocrystals obtained by Electrochemical method." MRS Advances 2, no. 43 (2017): 2343–48. http://dx.doi.org/10.1557/adv.2017.344.

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ABSTRACTThe impact of different annealing temperatures on the crystal structure, emission and radiative defects in ZnO nanocrystals (NCs) has been investigated by means of the scanning electron microscopy (SEM), Energy dispersion spectroscopy (EDS), X-ray diffraction (XRD) and photoluminescence (PL) techniques. ZnO NCs were prepared by the anodization of zinc sheets in an electrolyte and thermal annealed at the various temperatures: 200, 240, 280, 320, 360 and 400°C for two hours in ambient air. The XRD study indicates that ZnO NCs are characterized by the hexagonal wurtzite structure.The study of annealing temperature impact on the morphology of ZnO NCs has shown that the NC size enlarges and the film crystallinity improves with increasing annealing temperatures from 200°C up to 400°C. But in the temperature range of 360-400oC the dissolution of oxygen atoms raises essentially in ZnO NC films as it follows from EDS data. Simultaneously, the near band edge (NBE) emission intensity falls down, XRD parameters of ZnO NCs change and the intensity of defect related orange and green PL bands increases owing to increasing the defect concentrations. The optimal temperatures for the ZnO NC oxidation, together with keeping the high NBE emission intensity, are estimated as 360 °C. The nature of native defects responsible for orange and green emissions in ZnO NCs has been discussed.
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Werner, A., C. M. Volk, E. V. Ivanova, T. Wetter, C. Schiller, H. Schlager, and P. Konopka. "Quantifying transport into the Arctic lowermost stratosphere." Atmospheric Chemistry and Physics Discussions 9, no. 1 (January 15, 2009): 1407–46. http://dx.doi.org/10.5194/acpd-9-1407-2009.

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Abstract. In-situ measurements of the long-lived trace gases N2O, CFC-11 (CCl3F), H-1211 (CBrClF2), CH4, O3 and H2O performed in the Arctic winter 2003 on board the high-altitude aircraft M55 Geophysica are presented and used to study transport into the lowermost stratosphere (LMS). Fractions of air in the LMS originating in i) the troposphere, ii) the extra-vortex stratosphere above 400 K and iii) the Arctic vortex above 400 K are determined using a simple mass balance calculation. The analysis exhibits a strong tropospheric influence of 50% or more in the lowest 20 K of the high-latitude LMS. Above this region the LMS is dominated by air masses having descended from above 400 K. Below the Arctic vortex region at potential temperatures above 360 K, air in the LMS is a mixture of extra-vortex stratospheric and vortex air masses. The vortex fraction increases from about 40% at 360 K to 100% at 400 K for equivalent latitudes >70° N. This influence of air masses descending through the bottom of the polar vortex increases over the course of the winter. By the end of winter a significant fraction of 30% vortex air in the LMS is found even at an equivalent latitude of 40° N. Since the chemical and dynamical history of vortex air is distinct from that of mid-latitude stratospheric air masses, this study implies that the composition of the mid- to high-latitude LMS during late winter and spring is significantly influenced by the Arctic vortex.
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Chen, Wei, Gang Chen, Jing Zhai, and Li Ma. "Processing Map of Mg-13Al-3Ca-3Zn-1Nd-0.2Mn Magnesium Alloy." Advanced Materials Research 941-944 (June 2014): 48–53. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.48.

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Compression tests of Mg-13Al-3Ca-3Zn-1Nd-0.2Mn Magnesium alloy as-extruded had been performed in the compression temperature range from 200°C to 400°C and the strain rate range from 0.001 s−1 to 10 s−1 and the flow stress data obtained from the tests were used to develop the power dissipation map, instability map and processing map. The most unsuitable zones in the power dissipation map including 200°C - 315°C and 0.01s-1- 0.1s-1 zone, 315°C - 400°C and 0.001s-1- 0.01s-1zone and 340°C - 360°C and 0.32 s-1- 0.56 s-1zone. The most unsuitable zones in the instability map are 310°C - 400°C, 0.001s-1to 0.56 s-1zone and 330°C - 400°C, 1s-1to 10 s-1zone. The most suitable temperature range is 330°C - 400°C and most optimal strain rate ranges are 1 s-1- 10 s-1and 0.001s-1- 0.56 s-1.
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Pikula, P. A., A. K. Golovko, and V. F. Kamyanov. "The Composition and properties of Straight-Run and Mechanoactivated 360-400°C Distillate from Yakut Petroleum." Eurasian Chemico-Technological Journal 3, no. 3 (March 10, 2007): 205. http://dx.doi.org/10.18321/ectj570.

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The group hydrocarbon composition of 360-400°C straight-run distillate of the petroleum from Talakanskoye oil-field (Yakutia − Republic of Saha) has been studied in detail using clathrate formation, liquid adsorption chromatography, thermodiffusion methods and mass spectrometric analysis of obtained thermodiffusion fractions. The fundamental physical constants of all isolated narrow hydrocarbon fractions were measured. The regularities of thermodiffusion separation of saturated hydrocarbons having different amounts of rings in molecules as well as the relations between properties and composition of the concentrates obtained were traced. It is established that a mechanoactivation of petroleum distillate leads to a change of its hydrocarbon composition, first of all to a decrease of its paraffin content, as well as to respective changes of its physicalchemical characteristics (to a decrease in pour point and an increase in density and viscosity values).
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Mikkola, Kauri. "Review: Die Schmetterlinge Baden-Württembergs." Entomologica Fennica 11, no. 1 (January 1, 2000): 56. http://dx.doi.org/10.33338/ef.84046.

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Ebert, Günter (ed.) 1997, 1997 & 1998: Die Schmetterlinge Baden-Württembergs. Bände 5-7. Sesiidae, Arctiidae, Noctuidae. 575 + 622 + 582 pp., 400 + 512 + 483 colour photographs, 360 + 433 + 329 diagrams and drawings, and 133 + 187 + 170 distribution maps. Verlag Eugen Ulmer. Stuttgart. ISBN 3-8001-3481-0, 3-8001-3482-9, 3-8001-3500-0. Price: Ca. FIM 480,-/part.
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Dissertations / Theses on the topic "360-400"

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Hamel, Roman [Verfasser]. "Strafen als Sprechakt. : Die Bedeutung der Strafe für das Opfer. / Roman Hamel." Berlin : Duncker & Humblot, 2009. http://d-nb.info/1238362133/34.

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Giacomoni, Marcello Paniz. "Ecos de uma tradição : a ideia de decadência na obra Epitoma Rei Militaris, de Flavius Vegetius Renatus." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/30637.

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O presente trabalho “Ecos de uma tradição: a ideia de decadência na obra Epitoma Rei Militaris, de Flavius Vegetius Renatus” analisa os escritos desse autor romano dos séculos IV-V d.C., cujo tratado pretendia servir como base para uma reforma no exército imperial. Procuro compreender o funcionamento da ideia de decadência em sua obra, partindo da noção de formação discursiva, desenvolvida por Michel Foucault. A partir dessa problemática, os enunciados, objetos, estratégias e conceitos que compõem e constroem o discurso da decadência são descritos. Na medida em que são analisados os autores fontes de Vegetius, os enunciados são ligados a uma tradição decadentista. O objetivo final desta pesquisa é analisar o diálogo entre esta tradição e o uso dos enunciados na obra em questão.
This work entitled “Echoes of a tradition: the idea of decadence in the work Epitoma Rei Militaris, of Flavius Vegetius Renatus” examines the writings of the said roman author of the fourth-fifth century A.D., whose treaty was intended to serve as the basis for a reform of the imperial army. I try to understand the operation of the idea of decadence in his work, based on the notion of discursive formation, developed by Michel Foucault. Based on this problematic, the statements, objects, strategies and concepts that compose and construct the discourse of decline are described. Throughout the analyzes of Vegetius and its sources the statements are linked to a decadent tradition. This research’s goal is to exam the dialogue between this tradition and the use of statements in the book in question.
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Chen, Lixin [Verfasser]. "Investigation of stored neutron-rich nuclides in the element range of Pt-U with the FRS-ESR facility at 360 - 400 Mev,u / Lixin Chen." 2008. http://d-nb.info/991918835/34.

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Books on the topic "360-400"

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Darlington, Mansur. Yamaha XS250, 360 & 400 twins owners workshop manual. Sparkford: Haynes, 1992.

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Darlington, Mansur. Yamaha XS250, 360 & 400 Twins: Owners workshop manual. Sparkford, Nr. Yeovil, Somerset, England: Haynes Pub. Group, 1986.

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How to Build Dodge/Plymouth Performance for 273, 318, 340, 360 "A" Engines and 383, 400, 413, 426, 440 "B" Engines. Motorbooks International, 1986.

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Book chapters on the topic "360-400"

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"Greeks in Persia and Egypt, ca. 400–360." In Greek Military Service in the Ancient Near East, 401–330 BCE, 88–118. Cambridge University Press, 2019. http://dx.doi.org/10.1017/9781108583350.004.

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Boyce, Christine Corbet, and Beth Linderbaum. "What Kind of Talent Do We Have Here?" In Handbook of Strategic 360 Feedback, 397–406. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190879860.003.0024.

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This chapter describes a global pharmaceutical company that used 360 Feedback and other talent assessments to address critical strategic challenges in its business. The company collected behavioral data on approximately 400 sales leaders as part of a system-wide talent assessment that allowed a newly appointed leader to craft a talent strategy that would support his business strategy. By linking 360 Feedback data, personality assessments and sales results, the organization’s senior leadership team was able to critically examine its system-wide talent profile in the context of its ambitious commercial strategies. This system-wide profile was then used to shape short- and long-term plans for developing talent and shifting the culture at all levels to better align with business goals.
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Thanuskodi, S. "Usage of Social Media Among LIS Students in India." In Literacy Skill Development for Library Science Professionals, 1–24. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7125-4.ch001.

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Social media has become a popular method for students to share information and knowledge and to express emotions. They enable students to exchange videos files, text messages, pictures, and knowledge sharing. They provide an opportunity for students to improve social networking and learning processes, which promotes knowledge in society. This study examined the use of social media among LIS students of selected universities in India. The main objectives of the study are to find out the reasons why LIS students use social media, to identify students' perception of social media, and to find out the frequency of social media usage. The study used a questionnaire in order to discover the use of SNS. Well-structured questionnaires were distributed among 400 LIS students in India. Out of the 400 questionnaires distributed, 360 were completely filled and returned, giving a return rate of 90%.
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"Régions Francophones réels Francophones occasionnels Population Nombre % Nombre % AFRIQUE 30 001 000 4,7 40 617 000 6,3 645 000 000 Afrique du Nord-Est 219 000 0,31 700 000 2 83 400 000 Maghreb 14 455 000 24,7 17 030 000 29 58 400 000 Afrique subsaharienne 13 477 000 3,3 19 745 000 4,8 489 140 000 OCÉAN INDIEN 1 850 000 13,2 2 142 000 15,2 14 060 000 AMÉRIQUE 8 682 000 1,23 565 000 0,5 714 000 000 Amérique du Nord 7 286 000 2,93 2000 000 1,3 247 806 000 Amérique centrale, Caraïbes 1 216 000 0,7 365 000 0,2 176 794 000 Amérique du Sud 180 000 0,06 289 4000 000 ASIE 1 627 000 0,05 810 000 0,03 3 060 000 000 Proche et Moyen-Orient 1 491 000 0,8 800 000 0,4 186 000 000 Extrême-Orient 136 000 0,005 10 000 0,0004 2 874 000 000 EUROPE 63 952 000 8,19 200 000 0,1 789 000 000 Europe de l’Ouest 62 872 000 17,5 5 200 000 1,4 360 000 000 Europe de l’Est et URSS 1 080 000 0,34 000 000 0,9 429 000 000 OCÉANIE 350 000 1,3 33 000 0,1 26 000 000 MONDE 104 612 2 54 225 000 1 5 234 000 000." In Francotheque: A resource for French studies, 219. Routledge, 2014. http://dx.doi.org/10.4324/978020378416-36.

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Conference papers on the topic "360-400"

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Aguilar-Benitez, M., and M. I. Josa. "Properties of charm particles produced in hadron interactions (360 GeV/c π− p, 400 GeV/c pp)." In GLUEBALLS, HYBRIDS, AND EXOTIC HADRONS. AIP, 1989. http://dx.doi.org/10.1063/1.38087.

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Wang, Xu, Jun Tan, Liutao Chen, Hong Zou, Dungu Wen, Yang Xu, Changyuan Gao, Yongjun Deng, Yuemin Zhou, and Lumin Wang. "Stability of SPPs in Zirconium Alloy CZ2 Under Self-Ion Irradiation." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-67128.

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Zr-Nb zirconium alloy was developed at CNPRI and designated as CZ2. In this paper, the composition, size distribution and crystal structure of second phase particles (SPPs) in CZ2 have been analyzed under transmission electron microscopy (TEM). Two types of SPPs were observed in CZ2, which are bcc β-Nb and hcp Zr-Nb-Fe. To study the radiation effects on SPPs, CZ2 in two different heat treatment conditions CZ2-SRA (stress relieved) and CZ2-RXA (recrystallized) were irradiated with 3 MeV Zr++ up to 1.14×1016 Zr/cm2 (50 dpa at the damage peak) at three different temperatures 320°C, 360°C and 400°C in Texas A&M University. Commercial low-tin Zr-4 was also irradiated at the same condition as a reference. The results show that the SPPs of Zr-4 become completely amorphous after irradiation at 320°C and 360°C, while retain crystalline at 400 °C. SPPs of CZ2-RXA are partially disordered only after irradiation at 320°C. The crystal structure of SPPs in CZ2-SRA survived at all temperatures.
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Chen, Shia-Chung, Chia-Yen Tseng, and Wei-Liang Liaw. "Study on Micro-Channels Design for Centrifugal Force Driven Micro-Fluid System." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52149.

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Centrifugal force has been found to be an excellent method to control fluidic flow in biochips. Most micro-fluidics researchers already use the computer to simulate micro-fluidics flow behavior to save time and reduce mistakes. In this study, the overflow design accurately fixes the liquid volume with less than 5% error. Centrifugal force driven micro-fluidics system is designed with both simulation and experiment. The 3D simulations to utilize computational fluid dynamic software (CFD) to simulate the fluid flow and calculate burst frequency at different capillary switching and several dimension of micro-channels (300, 400, 500μm wide and each 200μm deep). For mercurochrome, the simulation results (384, 360, 348 rpm) shows burst frequency matches experimental results (468, 426, 402rpm) and accurately predicts measured trends followed the effect of channel width. This study also demonstrates the centrifugal application of an advanced computational fluidic dynamics model for the design and analysis of a centrifugal force driven micro-fluidics system.
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Hsiang, Su-Hai, and Yi-Wei Lin. "Study on the Mechanical Properties of AZ31 Magnesium Alloy Products Under Hot Extrusion Process." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95241.

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Magnesium alloy parts have the merits of low specific gravity, high specific strength, electromagnetic wave-proof shelter, and recyclability; therefore, it has been extensively applied to 3C and car industries. However, the processing and forming of magnesium is quite difficult to control due to magnesium’s hexagonal close-packed (HCP) structure, making the slipping face of itself less than the FCC material. Currently, common processing methods of magnesium alloys are die casting, semi-solid forming, and plastic forming. In the employment of a fixed-speed method for extrusion, the extruded sheet had serious defects in the forms of cracks on the surface. Hence, in this research, AZ31 magnesium alloy sheet metals were processed by hot extrusion using a variable speed method. The formability of AZ31 sheets under converging dies was investigated. Three converging dies with semi die angle of 20°, 30°, and 40° were used. Experiments were conducted and analyzed utilizing the Taguchi method. L9 orthogonal array was used to design the experiments under extrusion ratio of 35.9. Four important process parameters considered in this research are the heating temperature of the billet (320°C, 340°C and 360°C), the temperature of the container (300°C, 350°C and 400°C), the initial speed of extrusion (2mm/sec, 3mm/sec and 4mm/sec), and the lubricants (boron nitride, molybdenum disulphide and graphite) applied in the extrusion. The influences of these parameters to the extrusion load and the resulting mechanical properties were investigated. Moreover, the microstructure of the extruded sheets was observed to provide better insight of the formability. As a result, the optimal combinations of the process parameters were determined for the maximum tensile strength.
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Burroughs, A., L. Taylor, D. Sprengers, R. A. Hatton, N. McIntyre, and P. BA Kernoff. "HAEMOSTATIC CHANGES IN CIRRHOSIS AFTER REPEATED DOSES OF DESAMINO D-ARGININE VASOPRESSIN (DDAVP)." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644128.

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Eight patients with stable cirrhosis received DDAVP (0.3ug/kg I. V. of Desmopressin acetate, Ferring Pharmaceuticals) and this dose was repeated after 4h and 24h. Blood for haemostatic studies was collected immediately before and lh after each dose. Results, shown below as medians (expressed in u/dl), with ranges in parentheses, were analysed using the Wilcoxon signed rank test for paired data. One hour after the first dose, von Willebrand factor antigen (VW:ag) and Ristocetin co-factor activity (Ricof) rose from 380 (182-1060) to 502 (230-1000), p<0.01 and from 400 (154-1200) to 494 (180-1600), p<0.01 respectively. This rise was sustained at 4h but increased further lh after the second dose: VW:ag to 540 (305-1000) and Ricof to 570 (420-1150), p<0.01. Levels were significantly above baseline (p<0.01) at 24h but rose again after the third dose: VW:ag to 540 (300-1180), p=<0.01 and Ricof to 479 (277-625). A similar but less marked response was seen in factor VIII:C from 220 (112-300) to 300 (128-360) p= 0.01 at lh, which was maintained up to 4h but not 24h. The rise after the second and third dose was not significant. Multimeric analysis of VWF showed an increase in the very high MW oligomers after DDAVP. Irrespective of the basal value, the euglobulin lysis time shortened consistently after DDAVP and platelet aggregation showed an enhancement with ristocetin, a decrease with adrenaline and no change with adenosine diphosphate and collagen. The bleeding time shortened in half the patients but did not correlate with other changes. We conclude that rises in VW:ag and Ricof are sustained with repeated doses of DDAVP despite the high initial levels in cirrhotics, whereas rises in VIII:C and fibrinolytic activity are transient.
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Yao, M. Y., B. X. Zhou, Q. Li, W. P. Zhang, L. Zhu, L. H. Zou, J. L. Zhang, and J. C. Peng. "Effect of Bi Addition on the Corrosion Behavior of Zirconium Alloys." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-15460.

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In order to investigate systematically the effect of Bi addition on the corrosion resistance of zirconium alloys, different zirconium-based alloys, including Zr-4 (Zr-1.5Sn-0.2Fe-0.1Cr), S5 (Zr-0.8Sn-0.35Nb-0.4Fe-0.1Cr), T5 (Zr-0.7Sn-1.0Nb-0.3Fe-0.1Cr) and Zr-1Nb, were adopted to prepare the zirconium alloys containing Bi of 0∼0.5% in mass fraction. These alloys were denoted as Zr-4+xBi, S5+xBi, T5+xBi and Zr-1Nb+xBi, respectively. The corrosion behavior of these specimens was investigated by autoclave testing in lithiated water with 0.01 M LiOH or deionized water at 360°C/18.6 MPa and in superheated steam at 400 °C/10.3 MPa. The micro structure of the alloys was examined by TEM and the second phase particles (SPPs) were analyzed by EDS. Micro structure observation shows that the addition of Bi promotes the precipitation of Sn as second phase particles (SPPs) because Sn is in solid solution in α-Zr matrix in Zr-4, S5 and T5 alloys. The concentration of Bi dissolved in α-Zr matrix increase with the increase of Nb in the alloys, and the excess Bi precipitates as Bi-containing SPPs. The corrosion results show that the effect of Bi addition on the corrosion behavior of different zirconium-based alloys is very complicated, depending on their compositions and corrosion conditions. In the case of higher Bi concentration in α-Zr, the zirconium alloys exhibit better corrosion resistance. However, in the case of precipitation of Bi-containing SPPs, the corrosion resistance gets worse. This indicates that the solid solution of Bi in α-Zr matrix can improve the corrosion resistance, while the precipitation of the Bi-containing SPPs is harmful to the corrosion resistance.
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Yang, Nicholas H., Kathleen Allen Rodowicz, and David Dainty. "Baseball Head Impacts to the Non-Helmeted and Helmeted Hydrid III ATD." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38648.

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Traumatic brain injury may occur in baseball due to a head impact with a thrown, pitched, or batted ball. It has been shown that the average pitching speed of youth pitchers and high school pitchers is approximately 63 mph (28 m/s) and 74 mph (33 m/s), respectively. At pitching speeds of approximately 52 mph (23 m/s), the bat exit velocity (BEV) for metal bats has been shown to be approximately 100 mph (45 m/s). Head kinematics, such as linear and angular head accelerations, are often used to establish head injury risk for head impacts. With a possible ball impact velocity reaching speeds in excess of those typically tested for baseball headgear, it is necessary to understand how the head will respond to high velocity impacts in both helmeted and non-helmeted situations. In this study, head impacts were delivered to the front and side of a Hybrid III 50th percentile male anthropomorphic test device (ATD) by a baseball traveling at speeds of 60 mph (27 m/s), 75 mph (34 m/s), and 100 mph (45 m/s). Head impacts were performed on the non-helmeted ATD head and with the ATD wearing a standard batting helmet certified in accordance with the NOCSAE standard. The Hybrid III headform was instrumented with a nine accelerometer array to measure linear accelerations of the head and determine angular accelerations. Peak resultant linear head accelerations for the non-helmeted ATD were approximately 200–400 g for frontal impacts and approximately 220–480 g for lateral impacts. Peak resultant angular head accelerations for the non-helmeted condition were approximately 17,000–32,000 rad/s2 for frontal impacts and approximately 30,000–60,000 rad/s2 for lateral impacts. For the helmeted ATD, peak resultant linear accelerations of the head were approximately 70–300 g for frontal impacts and approximately 80–360 g for lateral impacts. Peak resultant angular head accelerations for the helmeted ATD were approximately 5,000–14,000 rad/s2 for frontal impacts and approximately 7,500–30,000 rad/s2 for lateral impacts. HIC values for the non-helmeted ATD were approximately 193–1,025 for frontal impacts and approximately 241–1,588 for lateral impacts. SI values for the non-helmeted ATD were approximately 235–1,267 for frontal impacts and approximately 285–1,844 for lateral impacts. HIC values for the helmeted ATD were approximately 16–415 for frontal impacts and approximately 23–585 for lateral impacts. SI values for the helmeted ATD were approximately 25–521 for frontal impacts and approximately 32–708 for lateral impacts. In comparison to the non-helmeted condition, the results demonstrate the effectiveness of a batting helmet in mitigating head accelerations for the frontal and lateral impact conditions tested.
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8

San Andrés, Luis, and Wonbae Jung. "Evaluation of Coated Top Foil Bearings: Dry Friction, Drag Torque, and Dynamic Force Coefficients." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75595.

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Abstract:
Despite their many advantages, bump-type foil bearings (BFBs) have issues of dry-friction during sliding contact at rotor start/stop cycles. To prevent premature wear of both shaft and the BFB, the proper selection and application of a coating on the top foil is of importance to ensure bearing long life. This thesis presents measurements characterizing the static and dynamic load performance of a Generation I BFB having uncoated and coated (VN, TiSiN, MoS2) top foils. The bearing, with length L and diameter D = 38 mm, integrates a 360° 0.127 mm thick top foil made of Inconel X-750, and a 27 bumps strip layer, 0.47 mm in height, made of the same stock as for the top foils. The VN and TiSiN coating, 0.005 mm thick, applies to the front and back surfaces of a top foil. The MoS2 coating, 0.020 mm thick, is sacrificial. The tests were conducted at room temperature (21°C), determined by the existing test facility. The dry-sliding torque (T) increases linearly with an increase in applied static load, max W/(LD) = 25.6 kPa. The bearing with a VN coated top foil shows the largest turning torque. The dry-sliding friction factor f = T/(½WD) decreases as the specific load (W/(LD)) increases. As expected, journal rotation towards the top foil free end (clockwise) produces a larger f than for rotations in reverse. A test-rig records the BFB drag torque during rotor acceleration and deceleration procedures to/from 70 krpm (138 m/s). The vertical load applied into a bearing equals W/(LD) = −8.0 kPa, 0 kPa and 8.0 kPa. In general, the bearing with a coated top foil shows a lesser drag torque than that of the uncoated top foil bearing. Among the coated foil bearings, the one with VN coating shows the highest drag torque, whereas another with MoS2 coating shows the lowest. When the rotor starts up, the dry-sliding friction coefficient (f) of the bearing with VN coating is ∼0.4 while f for the bearing with TiSiN coating is 0.3∼0.4. The uncoated bearing shows the largest f ∼0.6, and the MoS2 coated one has the lowest f = 0.2∼0.3. The drag torque, increasing with an increase in applied static load, is small when the rotor is airborne (lesser than ∼10% of peak torque). Dynamic load tests spanning excitation frequencies (ω) from 200 Hz to 400 Hz serve to identify force coefficients for the test BFBs with a specific load of 16 kPa and operating with shaft speed at 50 krpm (833 Hz). Baseline measurements correspond to a null applied load and no shaft rotation. The test bearings show a remarkable behavior with nearly isotropic direct coefficients and very small cross-coupled ones. The bearing direct stiffnesses (K) increase with frequency whereas the direct damping coefficients (C) quickly decrease. The bearing material loss factor, γ = ωC/K, represents best the BFB ability to dissipate mechanical energy. Over the excitation frequency range, γ = 0.34, 0.28, and 0.12 for the uncoated top foil, VN coated and TiSiN coated bearings. The test data show the bearing loss factor correlates with the dry friction coefficient as γ ∼ (0.71 × f) at a rotor speed of 50 krpm (95 m/s). Since the top foils with VN or TiSiN are coated on both sides, kinetic friction between the back of a top foil and the bumps’ crests likely lessens during sustained contact.
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