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Journal articles on the topic 'Homogeneous zones of influence'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Alhamshry, Asmaa, Ayele Almaw Fenta, Hiroshi Yasuda, Reiji Kimura, and Katsuyuki Shimizu. "Seasonal Rainfall Variability in Ethiopia and Its Long-Term Link to Global Sea Surface Temperatures." Water 12, no. 1 (2019): 55. http://dx.doi.org/10.3390/w12010055.

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Investigating the influence of sea surface temperatures (SSTs) on seasonal rainfall is a crucial factor for managing Ethiopian water resources. For this purpose, SST and rainfall data were used to study a wide range of inhomogeneous areas in Ethiopia with uneven distribution of rainfall for both summer (1951–2015) and spring (1951–2000) seasons. Firstly, a preliminary subdivision of rainfall grid points into zones was applied depending on spatial homogeneity and seasonality of rainfall. This introduced new clusters, including nine zones for summer rainfall peak (July/August) and five zones for

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2

Belkabir, Abdelhay, François Robert, L. Vu, and C. Hubert. "The influence of dikes on auriferous shear zone development within granitoid intrusions: the Bourlamaque pluton, Val-d'Or district, Abitibi greenstone belt." Canadian Journal of Earth Sciences 30, no. 9 (1993): 1924–33. http://dx.doi.org/10.1139/e93-170.

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Shear-zone-related gold–quartz veins in granitoid intrusions are commonly intimately associated with mafic dikes, which may have a profound influence on the localization, orientation, and kinematics of auriferous shear zones. The Bourlamaque pluton of the Val-d'Or district contains several economic auriferous shear zones, most of which follow and overprint diorite dikes. Mineralization in all deposits consists of quartz–tourmaline–pyrite veins in reverse- oblique orientation with a significant range of strike, dip, and slip direction. The geometry and kinematics of shear zone and vein array wi

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Portier, Jeanne, Sylvie Gauthier, and Yves Bergeron. "Spatial distribution of mean fire size and occurrence in eastern Canada: influence of climate, physical environment and lightning strike density." International Journal of Wildland Fire 28, no. 12 (2019): 927. http://dx.doi.org/10.1071/wf18220.

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In Canada, recent catastrophic wildfire events raised concern from governments and communities. As climate change is expected to increase fire activity in boreal forests, the need for a better understanding of fire regimes is becoming urgent. This study addresses the 1972–2015 spatial distributions of fire cycles, mean fire size (FireSz) and mean fire occurrence (mean annual number of fires per 100000ha, FireOcc) in eastern Canada. The objectives were to determine (1) the spatial variability of fire-regime attributes, (2) the capacity of FireSz and FireOcc to distinguish homogeneous fire zones

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4

Fernandino, Diego O., Roberto Enrique Boeri, and Juan M. Massone. "Mechanism of Damage of Ferritic Ductile Iron, Influence of Matrix Heterogeneity." Materials Science Forum 925 (June 2018): 288–95. http://dx.doi.org/10.4028/www.scientific.net/msf.925.288.

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Ferritic ductile cast iron (FDI) microstructure is composed by graphite nodules embedded in a ferritic matrix. It is usual to assume that the ferritic matrix is homogeneous. However, the experimental analysis shows impurities and in some cases a high degree of heterogeneity. It is necessary to investigate the influence of these heterogeneities on the mechanical properties of FDI.This work focusses on the characterization of the elastoplastic properties of different zones of the ferritic matrix of FDI and the identification of the sequence and extent of the damage mechanisms at the micro-scale

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Yates, Michelle L., Heloise Gibb, and Nigel R. Andrew. "Habitat characteristics may override climatic influences on ant assemblage composition: a study using a 300-km climatic gradient." Australian Journal of Zoology 59, no. 5 (2011): 332. http://dx.doi.org/10.1071/zo11096.

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We assessed the relative importance of a variety of climatic and habitat variables in structuring ant communities along a 300-km climatic gradient. Sampling was conducted in semiarid, transitional and cool temperate climatic zones in New South wales, Australia. Ants were sampled at three paired sites of two habitats (pastures and conservation ‘remnants’) in each of the climatic zones (herein referred to as ‘zones’) using pitfall traps. Remnants represented original open forests, while pastures were a mix of grassland vegetation and cleared woodland. We tested the effects of habitat type, regio

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Nóbrega, Priscila S. V., and Jussara M. Martinelli-Lemos. "Composition and spatio-temporal variation in the density of the Brachyura (Decapoda, Pleocyemata) in the rocky substrates of an Amazonian estuary." Crustaceana 89, no. 13 (2016): 1447–66. http://dx.doi.org/10.1163/15685403-00003599.

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The present study investigated the composition, spatio-temporal distribution, and the influence of temperature and salinity on the density of brachyurans associated with rocky substrates in an estuary of the Brazilian Amazonian coast. Specimens were collected monthly at four sites representing the two margins (profiles), zones (inner and outer estuary) and the lower and upper mediolittoral portions at each site of the Marapanim estuary. A total of 14 species were collected and multivariate analyses revealed that the species composition varied systematically between zones, margins, mediolittora

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7

Costa, D., A. S. Leal, J. M. Mimoso, and S. R. M. Pereira. "Consolidation treatments applied to ceramic tiles: are they homogeneous?" Materiales de Construcción 67, no. 325 (2017): 113. http://dx.doi.org/10.3989/mc.2017.09015.

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The mass consolidation treatment of azulejos is necessary when ceramic biscuits show signs of disaggregation. Such treatment is often used as a complementary conservation technique to the reestablishment of weakened glaze-ceramic bonds. In this research, two commonly used consolidants (ethyl silicate and acrylic resin) were tested on artisanal ceramic tiles via mass consolidation and the resulting impregnation profiles were evaluated. The results indicated that after consolidation, hard zones frequently formed due to localized consolidant concentration after the polymerization and curing

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8

Liu, Yuanhong, Corey D. Wallace, Yaoquan Zhou, et al. "Influence of Streambed Heterogeneity on Hyporheic Flow and Sorptive Solute Transport." Water 12, no. 6 (2020): 1547. http://dx.doi.org/10.3390/w12061547.

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The subsurface region where river water and groundwater actively mix (the hyporheic zone) plays an important role in conservative and reactive solute transport along rivers. Deposits of high-conductivity (K) sediments along rivers can strongly control hyporheic processes by channeling flow along preferential flow paths wherever they intersect the channel boundary. Our goal is to understand how sediment heterogeneity influences conservative and sorptive solute transport within hyporheic zones containing high- and low-K sediment facies types. The sedimentary architecture of high-K facies is mode

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9

Svalov, A. M. "Effect of compact inclusion on the natural frequencies of vibrations of a pipe string in a well." SOCAR Proceedings, no. 1 (March 30, 2021): 73–77. http://dx.doi.org/10.5510/ogp20210100482.

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The influence of small-size inclusion of pipes in a well column on the natural frequency of its longitudinal vibrations is investigated. Using the asymptotic expansion in a small parameter, an analytical relation is obtained that describes the change in the period of the column oscillations in the form of some additional small term to the period of the homogeneous column oscillations. Numerical calculations show that the obtained analytical relations almost accurately describe the oscillation period of a column with a massive compact inclusion, while its difference from the oscillation period

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10

Pozdniakov, S. P., N. E. Sizov, and V. A. Lekhov. "THE SIZE OF THE SANITARY PROTECTION ZONE OF THE WATER INTAKE WELL IN THE LAYERED HETEROGENEOUS AQUIFER." Engineering Geology World 14, no. 2 (2019): 74–81. http://dx.doi.org/10.25296/1993-5056-2019-14-2-74-81.

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Sanitary protection zones (SPZ) of water intakes allocate on the time of movement from the outer boundary of the zone to the water intakes. For example, for zone II it is the time of microbial contamination transport, accepted for target aquifers insufficiently protected from the surface, which is equal to 400 days. For zone III, this is the time of chemical pollution transport equal to the estimated lifetime of the water intake. To calculate the spatial position of the boundaries of these zones, analytical and numerical methods are used based on the integration of equations for the velocities

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11

Irimia, Liviu Mihai, Cristian V. Patriche, and Hervé Quénol. "Analysis of viticultural potential and delineation of homogeneous viticultural zones in a temperate climate region of Romania." OENO One 48, no. 3 (2014): 145. http://dx.doi.org/10.20870/oeno-one.2014.48.3.1576.

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<p style="text-align: justify;"><strong>Aims</strong> : To characterize the viticultural potential and delineate homogeneous viticultural zones in the Huşi wine growing region (Romania) in order to provide necessary information for viticultural zoning.</p><p style="text-align: justify;"><strong>Methods and results</strong>: The methodology is based on a Geographic Information System (GIS) analysis of 15 ecological parameters, representative of the topography, climate and soils in temperate continental climate vineyards. Three homogeneous viticultural z

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Sulym, Heorhiy, Lyubov Piskozub, Yosyf Piskozub, and Iaroslav Pasternak. "Antiplane Deformation of a Bimaterial Containing an Interfacial Crack with the Account of Friction I. Single Loading." Acta Mechanica et Automatica 9, no. 2 (2015): 115–21. http://dx.doi.org/10.1515/ama-2015-0020.

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Abstract The paper presents the exact analytic solution to the antiplane problem for a non-homogeneous bimaterial medium containing closed interfacial cracks, which faces can move relatively to each other with dry friction. The medium is subjected to the action of normal and arbitrary single loading in a longitudinal direction. Based on the discontinuity function method the problem is reduced to the solution of the system of singular integral-differential equations for stress and displacement discontinuities at the possible slippage zones. Influence of loading parameters and the effects of fri

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13

Melnik, A. F., V. G. Shumetov, B. S. Kondrashin, and M. R. Mikhaylov. "Evaluation of the influence of sowing time on yield and quality of the wheat grain using Multivariate dispersion analysis." E3S Web of Conferences 254 (2021): 07006. http://dx.doi.org/10.1051/e3sconf/202125407006.

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The statistical analysis of the results of studies on the effect of sowing time on the yield and quality of winter wheat grains, from the perspective of multivariate variance analysis and multiple comparison of averages, is carried out in the article. It was found that the application of the procedure of a multivariate generalized linear model allows comparing the variants of experiments for all indicators in the aggregate. An important advantage of multiple comparisons over paired Student comparisons is also the ability to isolate homogeneous subgroups of experiments. In this study, post hoc

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14

Bachmann, D., S. Bouissou, and A. Chemenda. "Influence of weathering and pre-existing large scale fractures on gravitational slope failure: insights from 3-D physical modelling." Natural Hazards and Earth System Sciences 4, no. 5/6 (2004): 711–17. http://dx.doi.org/10.5194/nhess-4-711-2004.

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Abstract. Using a new 3-D physical modelling technique we investigated the initiation and evolution of large scale landslides in presence of pre-existing large scale fractures and taking into account the slope material weakening due to the alteration/weathering. The modelling technique is based on the specially developed properly scaled analogue materials, as well as on the original vertical accelerator device enabling increases in the "gravity acceleration" up to a factor 50. The weathering primarily affects the uppermost layers through the water circulation. We simulated the effect of this p

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15

Ledesma, J. L. J., T. Grabs, M. N. Futter, K. H. Bishop, H. Laudon, and S. J. Köhler. "Riparian zone controls on base cation concentrations in boreal streams." Biogeosciences Discussions 10, no. 1 (2013): 739–85. http://dx.doi.org/10.5194/bgd-10-739-2013.

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Abstract. Forest riparian zones are a major in control of surface water quality. Base cation (BC) concentrations, fluxes, and cycling in the riparian zone merit attention because of increasing concern of negative consequences for re-acidification of surface waters from future climate and forest harvesting scenarios. We present a two-year study of BC and silica (Si) flow-weighted concentrations from 13 riparian zones and 14 streams in a boreal catchment in northern Sweden. The Riparian Flow-Concentration Integration Model (RIM) was used to estimate riparian zone flow-weighted concentrations and

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16

Yin, Kexin, Anne-Laure Fauchille, Eugenia Di Filippo, et al. "The Influence of Mixing Orders on the Microstructure of Artificially Prepared Sand-Clay Mixtures." Advances in Materials Science and Engineering 2021 (September 10, 2021): 1–15. http://dx.doi.org/10.1155/2021/8552224.

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The mixing order of silica sand, clay (kaolinite), and water controls the microstructure of resulting artificial soil samples. Most homogeneous microstructures can be achieved by applying the mixing order “sand-water-clay.” The following methods were used to validate this statement: (1) optical observation, (2) X-ray tomography, (3) scanning electron microscopy, and (4) Mercury intrusion porosimetry. For all samples, clays are mainly organized in a homogeneous matrix but are also dispersed heterogeneously in micrometer-sized layers surrounding sand particles, particularly where sand grains sho

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17

Grachev, S., V. Korotenko, and N. Kushakova. "Study on influence of two-phase filtration transformation on formation of zones of undeveloped oil reserves." Journal of Mining Institute 241 (February 25, 2020): 68. http://dx.doi.org/10.31897/pmi.2020.1.68.

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In order to study the process of fluid filtration during flooding of an oil field, article uses Rapoport – Lis model of non-piston oil displacement by water. During plane-radial filtration in a homogeneous formation, radii of disturbance zones are determined with and without taking into account the end effect. Influence of changes in value of capillary pressure gradient on distribution of water saturation coefficient in the non-piston displacement zone for high and low permeability reservoirs is revealed. Application of an element model for a five-point injection and production well placement

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18

Ortuani, Bianca, Giovanna Sona, Giulia Ronchetti, Alice Mayer, and Arianna Facchi. "Integrating Geophysical and Multispectral Data to Delineate Homogeneous Management Zones within a Vineyard in Northern Italy." Sensors 19, no. 18 (2019): 3974. http://dx.doi.org/10.3390/s19183974.

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Soil electrical conductivity (EC) maps obtained through proximal soil sensing (i.e., geophysical data) are usually considered to delineate homogeneous site-specific management zones (SSMZ), used in Precision Agriculture to improve crop production. The recent literature recommends the integration of geophysical soil monitoring data with crop information acquired through multispectral (VIS-NIR) imagery. In non-flat areas, where topography can influence the soil water conditions and consequently the crop water status and the crop yield, considering topography data together with soil and crop data

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19

Gil Guarín, Isabel Cristina, Silvia Lucía Villabona-González, Edison Parra-García, and Ricardo O. Echenique. "Environmental factors driving phytoplankton biomass and diversity in a tropical reservoir." Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales 44, no. 171 (2020): 423–36. http://dx.doi.org/10.18257/raccefyn.1052.

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We determined the spatial and temporal variation of phytoplankton biomass and diversity in 10 fortnightly sampling journeys verifying five sampling sites in El Peñol-Guatapé reservoir located in Antioquia, Colombia. In situ and ex situ physical and chemical variables were measured and phytoplankton samples were taken. Richness was dominated by Chlorophyta and biomass by Dinophyta. This variable was higher in the transition zone while in the riverine zone it showed average values, the lowest were registered in the lacustrine zone. Diversity was lower in the riverine zone, but it increased consi

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Cardil, A., M. Lorente, D. Boucher, J. Boucher, and S. Gauthier. "Factors influencing fire suppression success in the province of Quebec (Canada)." Canadian Journal of Forest Research 49, no. 5 (2019): 531–42. http://dx.doi.org/10.1139/cjfr-2018-0272.

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In the managed forest of Canada, forest fires are actively suppressed through efficient initial attack capability; however, the impact of different factors on the suppression success remains to be understood. The aim of this paper was to analyze the influence of operational suppression objectives (fire detection, initial attack, and fire control) along with fire intensity, fuel type, fire ignition cause, year, workload, and homogeneous fire regime zones on the achievement of the fire suppression objective (fire < 3 ha) using the Forest Fire Protection Agency of Quebec (SOPFEU) as a case stu

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Bottiglieri, Anna, Giuseppe Ruvio, Martin O’Halloran, and Laura Farina. "Exploiting Tissue Dielectric Properties to Shape Microwave Thermal Ablation Zones." Sensors 20, no. 14 (2020): 3960. http://dx.doi.org/10.3390/s20143960.

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The dielectric characterization of tissue targets of microwave thermal ablation (MTA) have improved the efficacy and pre-procedural planning of treatment. In some clinical scenarios, the tissue target lies at the interface with an external layer of fat. The aim of this work is to investigate the influence of the dielectric contrast between fat and target tissue on the shape and size of the ablation zone. A 2.45 GHz monopole antenna is placed parallel to an interface modelled by fat and a tissue characterized by higher dielectric properties and powered at 30 and 60 W for 60 s. The performances

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Serga, E. N., and I. N. Serga. "Zones of intensive interactions over the North Atlantic, 700 hPa level, November." Ukrainian hydrometeorological journal, no. 23 (June 8, 2019): 25–33. http://dx.doi.org/10.31481/uhmj.23.2019.03.

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The methods of cluster and component analysis were applied to the existing factors that are associated with the characteristics of heat and moisture exchange at 700 hPa level before their inclusion in the model of regional climates imitation, in order to detect zones of active interaction in the atmosphere over the North Atlantic and determine the regions hosting the processes that cause a significant impact on formation of features of climatic responsive regimes in the Eastern Europe. Each node of a 2,5º2,5º grid covering the North Atlantic has the first three main components identified and t

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Fleck, N. A., K. L. Johnson, M. E. Mear, and L. C. Zhang. "Cold Rolling of Foil." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 206, no. 2 (1992): 119–31. http://dx.doi.org/10.1243/pime_proc_1992_206_064_02.

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A theory of cold rolling of thin gauge strip is presented which, within the idealizations of homogeneous deformation and a constant coefficient of Coulomb friction, rigorously models the elastic deformation of the rolls and the frictional traction at the interface. In contrast with classical theories (3) it is shown that, for gauges less than a critical value, plastic reduction takes place in two zones, at entry and exit, which are separated by a neutral zone in which the rolls are compressed fiat and there is no slip between the rolls and the strip. Roll load and torque are governed by five i

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Riehl, Torben, Anne-Cathrin Wölfl, Nico Augustin, Colin W. Devey, and Angelika Brandt. "Discovery of widely available abyssal rock patches reveals overlooked habitat type and prompts rethinking deep-sea biodiversity." Proceedings of the National Academy of Sciences 117, no. 27 (2020): 15450–59. http://dx.doi.org/10.1073/pnas.1920706117.

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Habitat heterogeneity and species diversity are often linked. On the deep seafloor, sediment variability and hard-substrate availability influence geographic patterns of species richness and turnover. The assumption of a generally homogeneous, sedimented abyssal seafloor is at odds with the fact that the faunal diversity in some abyssal regions exceeds that of shallow-water environments. Here we show, using a ground-truthed analysis of multibeam sonar data, that the deep seafloor may be much rockier than previously assumed. A combination of bathymetry data, ruggedness, and backscatter from a t

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Masalmeh, Shehadeh K., Issa M. Abu-Shiekah, and Xudong Jing. "Improved Characterization and Modeling of Capillary Transition Zones in Carbonate Reservoirs." SPE Reservoir Evaluation & Engineering 10, no. 02 (2007): 191–204. http://dx.doi.org/10.2118/109094-pa.

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Summary An oil/water capillary transition zone often contains a sizable portion of a field's initial oil in place, especially for those carbonate reservoirs with low matrix permeability. The field-development plan and ultimate recovery may be influenced heavily by how much oil can be recovered from the transition zone. This in turn depends on a number of geological and petrophysical properties that influence the distribution of initial oil saturation (Sor) against depth, and on the rock and fluid interactions that control the residual oil saturation (Sor), capillary pressure, and relative perm

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Estrada, Olaia, Agustín Ariño, and Teresa Juan. "Salt Distribution in Raw Sheep Milk Cheese during Ripening and the Effect on Proteolysis and Lipolysis." Foods 8, no. 3 (2019): 100. http://dx.doi.org/10.3390/foods8030100.

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The salt distribution process in artisanal sheep cheese with an innovative shape of eight lobes was investigated. The cheese was subjected to two brining conditions: 24 h with brine at 16°Baumé and 12 h at 22°Baumé. The chemical composition (pH, water activity, dry matter, fat, and protein content), proteolysis (nitrogen fractions and free amino acids), and lipolysis (free fatty acids) were evaluated in two sampling zones (internal and external) at 1, 15, 30, 60, 90, 120, 180, and 240 days of ripening. The whole cheese reached a homogeneous salt distribution at 180 days of ripening. Brining co

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Moldovanu, Dan, and Florin Mariaşiu. "Numerical analysis of the injection law influence on NOx emissions for a compression ignited engine." MATEC Web of Conferences 184 (2018): 01019. http://dx.doi.org/10.1051/matecconf/201818401019.

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Under the present conditions, where sustained efforts are being made by researchers and automotive industry developers to reduce toxic gases (and fitting them into existing pollution standards), research is required to define the possible directions to be followed for this purpose. One of these directions is also presented in this paper.The paper presents research done by using numerical analysis of the influence of the injection law on NOx emission on compression ignited engines. Instead of a normal injection law, a particular injection law was considered to reduce the effect of the cavity on

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28

Huang, C. S., S. Y. Yang, and H. D. Yeh. "Technical Note: Approximate solution of transient drawdown for constant-flux pumping at a partially penetrating well in a radial two-zone confined aquifer." Hydrology and Earth System Sciences 19, no. 6 (2015): 2639–47. http://dx.doi.org/10.5194/hess-19-2639-2015.

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Abstract. An aquifer consisting of a skin zone and a formation zone is considered as a two-zone aquifer. Existing solutions for the problem of constant-flux pumping in a two-zone confined aquifer involve laborious calculation. This study develops a new approximate solution for the problem based on a mathematical model describing steady-state radial and vertical flows in a two-zone aquifer. Hydraulic parameters in these two zones can be different but are assumed homogeneous in each zone. A partially penetrating well may be treated as the Neumann condition with a known flux along the screened pa

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Bernuau, D., L. Legrès, Y. Lamri, N. Giuily, G. Fey, and G. Feldmann. "Heterogeneous lobular distribution of hepatocytes expressing acute-phase genes during the acute inflammatory reaction." Journal of Experimental Medicine 170, no. 1 (1989): 349–54. http://dx.doi.org/10.1084/jem.170.1.349.

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Functional heterogeneity in the lobule with regard to plasma protein synthesis is still debated. Therefore, we have localized in liver sections from normal rats and from rats with turpentine-induced AIR the mRNA and protein products of three genes with different alterations in their hepatic expression during an AIR: alpha 2M and alpha 1PI, two positively reacting acute-phase genes, and alpha 1I3, a negative acute-phase reactant. In normal liver, all hepatocytes expressed alpha 2M and alpha 1I3 mRNA, but a preferential expression of alpha 2M and alpha 1I3 mRNA and protein in the PP and ML zones

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Wang, Puquan, Daolun Chen, Yunqi Yan, et al. "Hierarchical Morphology and Formation Mechanism of Collision Surface of Al/Steel Dissimilar Lap Joints via Electromagnetic Pulse Welding." Metals 11, no. 9 (2021): 1468. http://dx.doi.org/10.3390/met11091468.

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The aim of this study was to characterize detailed microstructural changes and bonding characteristics and identify the formation mechanism of collision surface of Al6061–Q355 steel dissimilar welded joints via electromagnetic pulse welding (EMPW). The collision surface was observed to consist of five zones from the center to the outside. The central non-weld zone exhibited a concave and convex morphology. The welding-affected zone mainly included melting features and porous structures, representing a porous joining. The secondary weld zone presented an obvious mechanical joining characterized

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Şopu, Daniel, and Karsten Albe. "Influence of grain size and composition, topology and excess free volume on the deformation behavior of Cu–Zr nanoglasses." Beilstein Journal of Nanotechnology 6 (February 24, 2015): 537–45. http://dx.doi.org/10.3762/bjnano.6.56.

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The influence of grain size and composition on the mechanical properties of Cu–Zr nanoglasses (NGs) is investigated by molecular dynamics simulations using two model glasses of different alloy composition, namely Cu64Zr36 (Cu-rich) and Cu36Zr64 (Zr-rich). When the grain size is increased, or the fraction of interfaces in these NGs is decreased, we find a transition from a homogeneous to an inhomogeneous plastic deformation, because the softer interfaces are promoting the formation shear transformation zones. In case of the Cu-rich system, shear localization at the interfaces is most pronounced

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Li, Ming, Fuqiang Cao, Guiwen Wang, Xurong Chai, and Lianzhi Zhang. "Evolutional Characteristics of Regional Meteorological Drought and Their Linkages with Southern Oscillation Index across the Loess Plateau of China during 1962–2017." Sustainability 12, no. 18 (2020): 7237. http://dx.doi.org/10.3390/su12187237.

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The Loess Plateau of China (CLP) is located in the transition zone from a semi-humid climate zone to semi-arid and arid climate zones. It is influenced by the westerly circulation, plateau monsoon, and East Asian monsoon circulation, and the drought disasters across the CLP have obvious regional characteristics. In this study, climate regionalization was performed by a spatial hierarchical cluster approach based on the gridded datasets of monthly precipitation across the CLP from 1961 to 2017. Then, the standardized precipitation index (SPI) was used to explore the temporal evolution of region

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Gréa, B. J., and A. Ebo Adou. "What is the final size of turbulent mixing zones driven by the Faraday instability?" Journal of Fluid Mechanics 837 (December 21, 2017): 293–319. http://dx.doi.org/10.1017/jfm.2017.837.

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Miscible fluids of different densities subjected to strong time-periodic accelerations normal to their interface can mix due to Faraday instability effects. Turbulent fluctuations generated by this mechanism lead to the emergence and the growth of a mixing layer. Its enlargement is gradually slowed down as the resonance conditions driving the instability cease to be fulfilled. The final state corresponds to a saturated mixing zone in which the turbulence intensity progressively decays. A new formalism based on second-order correlation spectra for the turbulent quantities is introduced for this

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Sciacovelli, L., P. Cinnella, and F. Grasso. "Small-scale dynamics of dense gas compressible homogeneous isotropic turbulence." Journal of Fluid Mechanics 825 (July 21, 2017): 515–49. http://dx.doi.org/10.1017/jfm.2017.415.

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The present paper investigates the influence of dense gases governed by complex equations of state on the dynamics of homogeneous isotropic turbulence. In particular, we investigate how differences due to the complex thermodynamic behaviour and transport properties affect the small-scale structures, viscous dissipation and enstrophy generation. To this end, we carry out direct numerical simulations of the compressible Navier–Stokes equations supplemented by advanced dense gas constitutive models. The dense gas considered in the study is a heavy fluorocarbon (PP11) that is shown to exhibit an i

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Li, Yong Hua, and Jing Zhang. "Research on the Influence of Conical Anvil on Upsetting Process of Forging by Finite Element Simulation." Advanced Materials Research 472-475 (February 2012): 1870–73. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.1870.

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The upsetting process of cylindrical forging was investigated using finite element method. The influence of conical anvil on deformation rule of metal and distribution of strain and stress was studied using software MSC. Marc. The simulated results indicated that it had a smaller rigid zone and more homogeneous deformation zone in the billet during upsetting process with conical anvil compared with flat anvil. The critical reduction in height which could assure the three dimensional compressive stress states for the upsetting with conical anvil was smaller than that for the flat one.

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Ivanova, M. M., V. V. Kolesov, V. V. Korobeinikov, A. M. Terehova, and G. L. Khorasanov. "The Impact of Isotopic Composition of Lead on the Neutron-Physical Characteristics of Fast Reactor with Liquid Metal Coolant." KnE Engineering 3, no. 3 (2018): 400. http://dx.doi.org/10.18502/keg.v3i3.1640.

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It is well known, that lead coolant, highly enriched by 208Pb, has some advantages over other coolants. It is predicted that the use of 208Pb in the reactor core will lead to an increase in the production of plutonium and transmutation of long-lived decay products. The main objective of this paper was to investigate the influence of the isotopic composition on the fast reactor neutron-physical characteristics. For this purpose we used the RBETS-M benchmark - a fast energy reactor that includes 12 zones with different sizes and temperatures of the materials. Calculations were performed for homo

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Lee, Deok-Bo, Toru Ikeda, Noriyuki Miyazaki, and Nak-Sam Choi. "Damage Zone Around Tip of an Interface Crack Between Rubber-Modified Epoxy Resin and Aluminum." Journal of Engineering Materials and Technology 124, no. 2 (2002): 206–14. http://dx.doi.org/10.1115/1.1417980.

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The fracture behavior of an interface crack tip has significant influence on the structural integrity of an adhesive joint. We investigate a damage zone and the deformation of rubber particles around a tip of an interface crack between rubber-modified epoxy resin and aluminum. They are compared with those around a crack tip in homogeneous rubber-modified epoxy resin. Cavitations in rubber particles are observed around a damaged crack tip in homogeneous resin but not around a damaged interface crack tip. Rubber particles around an interface crack tip are deformed ellipsoidally due to the residu

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Hernández, E., A. Rúa, R. Méndez, and L. Gimeno. "Finding regions of influence on SO<sub>2</sub> and SO<sup>=</sup><sub>4</sub> daily concentration measurements at four sites in Spain." Annales Geophysicae 14, no. 8 (1996): 853–63. http://dx.doi.org/10.1007/s00585-996-0853-5.

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Abstract. Contamination by the pollutants SO2 and SO=4 was analyzed for the 1989–1992 period at four regional stations in Spain under the auspices of the EMEP-BAPMON program. The evolution of the time series of the daily pollution has also been assessed, and high mean concentrations at La Cartuja and Logroño observed, with values of 3.8 and 4.5 μg m–3 for SO2, respectively. Maximum annual concentrations were recorded in 1989, when SO2 reached values of 6.24, 5.39, 5.71, and 9.30 μg m–3 for the stations of La Cartuja, San Pablo de los Montes, Roquetas, and Logroño, respectively. This work attem

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Hernández-Pérez, Ezequiel, Eloy Solano, and Ramiro Ríos-Gómez. "Host affinity and vertical distribution of epiphytic orchids in a montane cloud forest in southern Mexico." Botanical Sciences 96, no. 2 (2018): 200. http://dx.doi.org/10.17129/botsci.1869.

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<p class="Standard1"><strong>Background</strong>: The host´s structural characteristics provide diverse microhabitats that influence the distribution patterns of the epiphytes at different vertical zones and among tree species.</p><p class="Standard1"><strong>Hypotheses</strong>: Epiphytic orchids have preference for larger host trees and with non-exfoliating rough bark, while the limiting hosts will be those of smaller size and smooth and exfoliating bark, and there will be fewer individuals in the upper canopy of the host trees because the micro-envi

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Pidvysotskyy, Valeriy, Pawel Jerzy Matuszyk, and Hermann Bloching. "Analysis of the Influence of the Specimen Shape on the Zone of Homogeneous Stress in Tensile Test." Materials Testing 48, no. 10 (2006): 498–503. http://dx.doi.org/10.3139/120.100767.

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SILVA, JANINE F., PAULA B. GOMES, ERIKA C. SANTANA, et al. "Growth of the tropical zoanthid Palythoa caribaeorum (Cnidaria: Anthozoa) on reefs in northeastern Brazil." Anais da Academia Brasileira de Ciências 87, no. 2 (2015): 985–96. http://dx.doi.org/10.1590/0001-3765201520140475.

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In Brazilian reefs, zoanthids, especially Palythoa caribaeorum are fundamental for structuring the local benthic community. The objective of this study was to determine the growth rate of P. caribaeorum, and to assess the influence of the site (different beaches), season (dry and wet), location (intertidal or infralittoral zones), and human pressure associated with tourism. For one year we monitored the cover of P. caribaeorum in transects and focused on 20 colonies. We cut off a square (100 cm2) from the central part of the colony and monitored the bare area for four months in each season. Th

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Brunelle, D., F. Blanchet, J. Rousselle, G. Jacquet, and A. Guillon. "The Influence of Spatial Heterogeneity of Rainfall upon the Hydrologic Response of an Urban Drainage Basin." Water Science and Technology 29, no. 1-2 (1994): 21–30. http://dx.doi.org/10.2166/wst.1994.0647.

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Hydrologic models of the black box type are the easiest simulation models to use, as much for their simplicity of conception as for their fast calculation times. One drawback, however, is that these general models consider each rainfall event to be perfectly homogeneous over the entire drainage surface of the watershed. Of course, such conditions are practically non-existent given the short time steps used in urban hydrology which tend to accentuate the heterogeneity of rainfall events. The main objective of this study was to verify whether the spatial heterogeneity of rainfall does in fact in

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Schmidová, Eva, Fatih Bozkurt, Bohumil Culek, Sunil Kumar, Lenka Kuchariková, and Milan Uhríčik. "Influence of Welding on Dynamic Fracture Toughness of Strenx 700MC Steel." Metals 9, no. 5 (2019): 494. http://dx.doi.org/10.3390/met9050494.

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Thermomechanically processed high-strength steels feature specific fracture behavior. One of the decisive criteria for their application is their stability against internal defects during impact loads, especially in connection with the welding. The work is focused on experimental analyses of the influence of welding on static and dynamic fracture toughness of Strenx 700MC steel. The fracture toughness was determined using the circumferentially notched round bar specimens during static loads and two dynamic load levels. To achieve a homogeneous zone for the requirements of fracture toughness te

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Sahebi, M. R., and J. Angles. "An inversion method based on multi-angular approaches for estimating bare soil surface parameters from RADARSAT-1." Hydrology and Earth System Sciences Discussions 6, no. 1 (2009): 207–41. http://dx.doi.org/10.5194/hessd-6-207-2009.

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Abstract. The radar signal recorded by earth observation (EO) satellites is known to be sensitive to soil moisture and soil surface roughness, which influence the onset of runoff. This paper focuses on the inversion of these parameters using a multi-angular approach based on RADARSAT-1 data with incidence angles of 35° and 47° (in mode S3 and S7). This inversion was done based on three backscatter models: Geometrical Optics Model (GOM), Oh Model (OM) and Modified Dubois Model (MDM), which are compared in order to obtain the best configuration. For roughness expressed in rms of heights, mean ab

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Wang, Qiusheng, Guowei Ma, and X. J. Wang. "Numerical Simulation on Tensile Failure of Rock-Like Heterogeneous Material Using a Modified SPH Method." International Journal of Computational Methods 12, no. 06 (2015): 1550039. http://dx.doi.org/10.1142/s0219876215500395.

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A modified smoothed particle hydrodynamics (SPH) method is applied to simulate the dynamic tensile failure of rock-like heterogeneous materials. The material heterogeneities are represented by different mechanical properties with a Weibull distribution at different particles over the specimen. An elasto-plastic-damage model is adopted to simulate material failure. Numerical simulations are performed for three specimens with different degrees of heterogeneity under quasi-static and dynamic loading conditions, respectively. The effects of strength criterion coefficient [Formula: see text] on the

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Guz’, A. N., and N. A. Shulga. "Dynamics of Laminated and Fibrous Composites." Applied Mechanics Reviews 45, no. 2 (1992): 35–60. http://dx.doi.org/10.1115/1.3119748.

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In the present review investigation results are presented on the elastic wave propagation in laminated and fibrous unidirectional composite materials modeled by the piecewise-homogeneous medium (the structural model). In contrast to continual theories, the model of such a type does not essentially impose additional restrictions (other than those postulated by solid deformable body mechanics) on frequencies and gradients of the spatial alteration of the wave processes investigated. However, it should be stressed that, within the framework of this approach, it is necessary to solve complicated b

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Behrens, Bernd-Arno, Hans Jürgen Maier, Gerhard Poll, et al. "Influence of degree of deformation on welding pore reduction in high-carbon steels." Production Engineering 15, no. 2 (2021): 161–68. http://dx.doi.org/10.1007/s11740-020-01009-z.

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AbstractLocally adapted properties within a machine component offer opportunities to increase the performance of a component by using high strenght materials where they are needed. The economic production of such hybrid components on the other hand represents a major challenge. The new tailored forming process chain, which is developed within the collaborative research center (CRC 1153) represents a possible solution to produce hybrid components. This is made possible by the use of pre-joined hybrid semi-finished products made from two different steel alloys, which are subsequently formed. The

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HEMMATI, SAHAR, BEHROUZ GATMIRI, YU-JUN CUI, and MARC VINCENT. "SOIL–VEGETATION–ATMOSPHERE INTERACTION BY A MULTIPHYSICS APPROACH." Journal of Multiscale Modelling 02, no. 03n04 (2010): 163–84. http://dx.doi.org/10.1142/s1756973710000382.

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Ground settlement can damage light buildings supported by shallow foundations through cracking. The prediction and modeling of tree roots effect on soil water content and consequently the soil settlements needs a comprehensive analysis of the interactions between tree roots, soil, and water. Root water uptake by trees depends on soil conditions, climatic parameters, and vegetation type. A two-dimensional root-water-uptake model is implemented in a fully coupled thermo-hydro-mechanic finite element program, θ-STOCK. Evapotranspiration from the soil surface covered by grasses is calculated using

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Kurtz, W., H. J. Hendricks Franssen, P. Brunner, and H. Vereecken. "Is inversion based high resolution characterization of spatially heterogeneous river bed hydraulic conductivity needed and possible?" Hydrology and Earth System Sciences Discussions 10, no. 5 (2013): 5831–73. http://dx.doi.org/10.5194/hessd-10-5831-2013.

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Abstract. River-aquifer exchange fluxes influence local and regional water balances and affect groundwater and river water quality and quantity. Unfortunately, river-aquifer exchange fluxes tend to be strongly spatially variable and it is an open research question to which degree river bed heterogeneity has to be represented in a~model in order to achieve reliable estimates of river-aquifer exchange fluxes. This research question is addressed in this paper with help of synthetic simulation experiments, which mimic the Limmat aquifer in Zurich (Switzerland), where river-aquifer exchange fluxes

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Kuresevic, Marina. "The language of the Story of the Sage Ahiqar from Serbian Manuscript No. 53 of the National Library of Serbia." Juznoslovenski filolog 72, no. 1-2 (2016): 105–26. http://dx.doi.org/10.2298/jfi1602105k.

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In terms of homogeneous diglossia, the basic characteristic of the Serbian mediaeval language situation, the usage of two language systems, Serbian Church Slavonic and Old Serbian, were clearly functionally demarcated. However, in some genres they could get closer to each other, could influence each other and could even interfere with each other. In some texts of secular character (especially those written in different sociolinguistic contexts or in peripheral shtokavian dialectal zones) as a result of the mutual influence of two language systems a hybrid language, a mixture of Serbian Church

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