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Artículos de revistas sobre el tema "Mass loss coupons"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 1 de febrero de 2022

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1

Chan, Cesar T., and Kenneth C. Hover. "Assessing Freeze-Thaw Damage in Segmental Retaining Walls Units by Mass Loss, Moisture Gain, and Relative Dynamic Modulus." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 11 (2019): 309–18. http://dx.doi.org/10.1177/0361198119851449.

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Segmental retaining walls (SRWs) constructed of dry-cast concrete masonry units are used in transportation-related applications for which freeze-thaw (FT) durability is evaluated on the basis of percent mass-loss accumulated after multiple FT cycles as per ASTM C1262. This study compared mass loss, mass gain owing to absorption during (FT) exposure, and relative dynamic modulus (RDM) as per ASTM C215. Application of RDM required accounting for the influence of the shape and moisture content of SRW coupons on resonant frequency, with corrections that are likewise applicable to ASTM C666 for ord

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2

Ekengwu, I. E., O. G. Utu, and K. O. Anyanwu. "Corrosion Inhibition Efficiencies of Polymeric Materials on Alloy Steel in Dilute Hydrochloric Acid and Sodium Hydroxide Solutions at Ambient Temperature." Journal of Engineering Sciences 7, no. 2 (2020): C27—C32. http://dx.doi.org/10.21272/jes.2020.7(2).c5.

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A corrosion control test was conducted on alloy steel, using polymeric coatings (polyurethane, bitumen (medium airing), and high-density polyethylene) in dilute HCl solutions of pH values 4, 7, and 12, respectively for acid, neutral and alkaline solutions at ambient temperature. In the study, Eighty-four coupons of alloy steel were used. The coupons were mechanized, ground, polished, etched with natal, and weighed using a digital weighing balance (Beva 206B). The mass of each coupon was recorded according to the tag number on them. Twenty-one of the coupons were coated with polyurethane, 21 co

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3

Švadlena, Jan, Tomáš Prošek, Kristýna Charlotte Strachotová, and Milan Kouřil. "Chemical Removal of Lead Corrosion Products." Materials 13, no. 24 (2020): 5672. http://dx.doi.org/10.3390/ma13245672.

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Restoration treatment, specimen preparation or mass loss measurements on coupons made of lead require a reliable process of dissolution of corrosion products. In this study, several types of model corrosion products with compositions representative of those found on real objects were prepared and characterized. Ten solutions were then thoroughly tested in interval cleaning experiments, regarding the efficiency of removal of the corrosion products, corrosivity towards bare lead, and remnants left on the surface. The solution recommended in the current version of the ISO 8470 standard was found

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4

Khodabux, Waseem, Paul Causon, and Feargal Brennan. "Profiling Corrosion Rates for Offshore Wind Turbines with Depth in the North Sea." Energies 13, no. 10 (2020): 2518. http://dx.doi.org/10.3390/en13102518.

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Corrosion in the marine environment is a complex and expensive form of damage. It is commonly studied by the deployment of coupons that reflect the marine corrosion a structure will experience, thus allowing design and maintenance prevention strategies to be developed accordingly. This study stems from the lack of information in the literature regarding the profiling of corrosion with respect to marine depth in the North Sea where important wind farm developments have been undertaken. To address such issue a field experiment has been designed and carried out in the vicinity of the Westermost R

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5

Silva, J. W. J., A. P. O. Belo, R. B. Ribeiro, and N. T. Matias. "Effects of Sodium Nitrite, Sodium Dichromate and Benzoic Acid as Inhibitors in the Protection of Mild Steel in Water." Materials Science Forum 802 (December 2014): 433–39. http://dx.doi.org/10.4028/www.scientific.net/msf.802.433.

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In Petrobrás SA refineries, there are thousands of heat exchangers in which cooling water is treated for recycling, often by outsourced companies. In all of these refineries there happens shutdown for corrective maintenance of the exchangers by problems related to corrosion caused by the cooling water, requiring about four days to repair a unit. The shutdown of a production line results in loss of revenue between U$ 200,000.00 and U$ 300,000.00 per day. To control the cooling water quality, it is used coupons for corrosion analysis. Tests are limited to visual inspection and by mass loss anal

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6

Amerinatanzi, Amirhesam, Reza Mehrabi, Hamdy Ibrahim, Amir Dehghan, Narges Shayesteh Moghaddam, and Mohammad Elahinia. "Predicting the Biodegradation of Magnesium Alloy Implants: Modeling, Parameter Identification, and Validation." Bioengineering 5, no. 4 (2018): 105. http://dx.doi.org/10.3390/bioengineering5040105.

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Magnesium (Mg) and its alloys can degrade gradually up to complete dissolution in the physiological environment. This property makes these biomaterials appealing for different biomedical applications, such as bone implants. In order to qualify Mg and its alloys for bone implant applications, there is a need to precisely model their degradation (corrosion) behavior in the physiological environment. Therefore, the primary objective develop a model that can be used to predict the corrosion behavior of Mg-based alloys in vitro, while capturing the effect of pitting corrosion. To this end, a custom

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7

Sanz Saiz, Carlos, Jesús Polo Martínez, and Nuria Martín Chivelet. "Influence of Pollen on Solar Photovoltaic Energy: Literature Review and Experimental Testing with Pollen." Applied Sciences 10, no. 14 (2020): 4733. http://dx.doi.org/10.3390/app10144733.

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This work attempts to shed some light on the impact of organic soiling due to pollen on solar photovoltaic (PV) power generation. Apart from introducing several soiling-related pollen features, the previous works reporting soiling by pollen have been reviewed. Local observations from late winter to early spring showed that a rooftop PV system experienced both uniform and non-uniform soiling issues, which were mainly caused by pollen from nearby cypress specimens. In addition, this work publishes preliminary results regarding an artificial soiling test performed with pollen. In this test, soda

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8

Yakubu, Suleiman Idawu, Rufai Ochu Suleiman, Rasheed Agava, Ogheneme Clifford, and Emokpaire Steven. "Adsorption and thermodynamics properties of acacia tortilis as corrosion inhibitor of aluminum metal matrix composites in acidic medium." Metallurgical and Materials Engineering 23, no. 2 (2017): 153–66. http://dx.doi.org/10.30544/281.

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Acacia tortilis (AT) was extracted and characterized by gas chromatography-mass spectrometry (GC-MS). The eco-friendly corrosion inhibitor for aluminum matrix composites was investigated in 1.0 M HCl at 30-60 °C. The concentration of the inhibitor and time were varied in the range of 0 – 10 % v/v and 24-144 h. The inhibition studies were carried out using gravimetric method and potentiodynamic polarization. The surface morphology of the coupons was characterized by SEM/EDS techniques. The GC-MS revealed some elements/compounds (NCS, C-H, N or O). The inhibition efficiency increased with concen

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9

Gopi, K. R., and R. Nagarajan. "Application of Power Ultrasound in Cavitation Erosion Testing of Nano-Ceramic Particle/Polymer Composites." Solid State Phenomena 136 (February 2008): 191–204. http://dx.doi.org/10.4028/www.scientific.net/ssp.136.191.

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Cavitation erosion is predominant in pipelines for liquid transportation, causing damage to pipe wall, impeller and their accessories. The present study is focused on development of cavitation -wear resistant nano-ceramic particle-reinforced polymer matrix material; and on study of its feasibility to be used as lining material in hydraulic transportation. The polymer/nano composite is fabricated using power ultrasound in all three process steps: synthesis of nano-dimensional particles of white fused alumina (WFA) from micron size particles, optimized blending and finally reinforcement into pol

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10

Ashirgade, A., P. B. Harakuni, and W. J. Vanooij. "Effects of Aging on the Morphology of Rubber-Brass Interfacial Layer." Tire Science and Technology 39, no. 1 (2011): 20–43. http://dx.doi.org/10.2346/1.3555084.

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Abstract Adhesion between rubber compound and brass-plated steel tire cord is crucial in governing the overall performance of tires. The rubber-brass interfacial adhesion is influenced by the chemical composition and thickness of the interfacial layer. It has been shown that the interfacial layer consists mainly of sulfides and oxides of copper and zinc. This paper discusses the effect of changes in the chemical composition and the structure of the interfacial layers due to addition of adhesion promoter resins. Grazing incidence x-ray diffraction (GIXRD) experiments were run on sulfidized poli

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11

Gergely, András, Roland Locskai, Péter Szabó, Antal Krójer, and Tamás Kristóf. "Hydrogen Sulphide Corrosion of Carbon and Stainless Steel Alloys Immersed in Mixtures of Renewable Fuel Sources and Tested Under Co-processing Conditions." Hungarian Journal of Industry and Chemistry 44, no. 1 (2016): 55–70. http://dx.doi.org/10.1515/hjic-2016-0007.

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Abstract In accordance with modern regulations and directives, the use of renewable biomass materials as precursors for the production of fuels for transportation purposes is to be strictly followed. Even though, there are problems related to processing, storage and handling in wide range of subsequent uses, since there must be a limit to the ratio of biofuels mixed with mineral raw materials. As a key factor with regards to these biomass sources pose a great risk of causing multiple forms of corrosion both to metallic and non-metallic structural materials. To assess the degree of corrosion ri

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12

Halla, Martin, Julia Schmieder, and Andrea Weber. "Job Displacement, Family Dynamics, and Spousal Labor Supply." American Economic Journal: Applied Economics 12, no. 4 (2020): 253–87. http://dx.doi.org/10.1257/app.20180671.

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We study the effectiveness of intrahousehold insurance among married couples when the husband loses his job due to a mass layoff or plant closure. Empirical results based on Austrian administrative data show that husbands suffer persistent employment and earnings losses, while wives’ labor supply increases moderately due to extensive margin responses. Wives’ earnings gains recover only a tiny fraction of the household income loss, and in the short-term, public transfers and taxes are a more important form of insurance. We show that the presence of children in the household is a crucial determi

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13

Dubus, Guillaume, Chris Done, Bailey E. Tetarenko, and Jean-Marie Hameury. "The impact of thermal winds on the outburst lightcurves of black hole X-ray binaries." Astronomy & Astrophysics 632 (November 26, 2019): A40. http://dx.doi.org/10.1051/0004-6361/201936333.

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Context. The observed signatures of winds from X-ray binaries are broadly consistent with thermal winds, which are driven by X-ray irradiation of the outer accretion disc. Thermal winds produce mass outflow rates that can exceed the accretion rate in the disc. Aims. We aim to study the impact of thermal wind mass loss on the stability and lightcurves of black hole X-ray binaries subject to the thermal-viscous instability driving their outbursts. Strong mass loss could stop outbursts early, as proposed for the 2015 outburst of V404 Cyg. Methods. We used an analytical model for thermal (Compton)

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14

Wang, Xiaoling, Yanjie Chang, Yanping Li, Xiaojing Zhang, and David W. Goodrich. "Thoc1/Hpr1/p84 Is Essential for Early Embryonic Development in the Mouse." Molecular and Cellular Biology 26, no. 11 (2006): 4362–67. http://dx.doi.org/10.1128/mcb.02163-05.

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ABSTRACT The yeast TREX complex physically couples elongating RNA polymerase II with RNA processing and nuclear RNA export factors to facilitate regulated gene expression. Hpr1p is an essential component of TREX, and loss of Hpr1p compromises transcriptional elongation, RNA export, and genome stability. Despite these defects, HPR1 is not essential for viability in yeast. A functional orthologue of Hpr1p has been identified in metazoan species and is variously known as Thoc1, Hpr1, or p84. However, the physiological functions of this protein have not been determined. Here, we describe the gener

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15

D’Ans, Pierre, and Marc Degrez. "Sliding Wear Behavior of Friction Couples Primarily Selected for Corrosion Resistance: Iron Boride/Iron Boride and Iron Boride/Yttria-Stabilized Zirconia." Metals 8, no. 12 (2018): 1071. http://dx.doi.org/10.3390/met8121071.

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Wear mitigation in a sliding couple is challenging if wear has to be minimized on both surfaces. In this paper, ball-on-disk testing is performed on sliding couples where both surfaces (ball and disk) are treated for wear resistance. Studied materials are pack borided H13 tool steel (ASTM A681), pack borided AISI 420 stainless steel (ASTM A276) and plasma sprayed yttria-stabilized zirconia (YSZ). Borided H13 steel exhibits a single phase Fe2B layer, while AISI 420 has a double phase layer, with FeB on the outer surface. Both FeB/Fe2B and FeB/YSZ couples generate three-body abrasion. In the lat

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16

Belleau, Hélène, and Pascale Cornut St-Pierre. "La question du « choix » dans la décision de se marier ou non au Québec." Partie 1 — Le choix à l’épreuve de la résistance des cadres sociaux, no. 66 (April 20, 2012): 65–89. http://dx.doi.org/10.7202/1008873ar.

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Dans le débat sur la pertinence d’un encadrement légal de l’union libre, le législateur québécois a jusqu’à maintenant soutenu l’importance de préserver le libre choix des individus qui souhaitent vivre en dehors des cadres du mariage. Un tel argument repose sur quatre postulats quant au « choix » que font les couples lorsqu’ils prennent la décision de se marier ou non, postulats qui ne sont étayés par aucune étude empirique. En tenant compte du point de vue des couples sur la vie conjugale et à l’aide de notions de sociologie du droit telles l’internormativité, la conscience du droit et l’eff

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17

Kang, Suah, Miji Kim, and Chang Won Won. "Spousal Concordance of Physical Frailty in Older Korean Couples." International Journal of Environmental Research and Public Health 17, no. 12 (2020): 4574. http://dx.doi.org/10.3390/ijerph17124574.

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Marital status is an important risk factor for physical frailty. However, there are limited data on spousal concordance of physical frailty among married couples. Here, we evaluate the spousal concordance of frailty as defined by the Fried frailty phenotype and specific phenotype components that contribute to this association. Data on 315 married couples (630 individuals) aged between 70 and 84 years were obtained from the Korean Frailty and Aging Cohort Study (KFACS). Multivariate logistic regressions were used for the analysis. After adjusting for covariates (age, body mass index, education,

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18

Fajardo-Cavazos, Patricia, Andrew C. Schuerger, and Wayne L. Nicholson. "Persistence of Biomarker ATP and ATP-Generating Capability in Bacterial Cells and Spores Contaminating Spacecraft Materials under Earth Conditions and in a Simulated Martian Environment." Applied and Environmental Microbiology 74, no. 16 (2008): 5159–67. http://dx.doi.org/10.1128/aem.00891-08.

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ABSTRACTMost planetary protection research has concentrated on characterizing viable bioloads on spacecraft surfaces, developing techniques for bioload reduction prior to launch, and studying the effects of simulated martian environments on microbial survival. Little research has examined the persistence of biogenic signature molecules on spacecraft materials under simulated martian surface conditions. This study examined how endogenous adenosine-5′-triphosphate (ATP) would persist on aluminum coupons under simulated martian conditions of 7.1 mbar, full-spectrum simulated martian radiation cal

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19

Wu, Yuelin, and Andre Lee. "Corrosion-Induced Mass Loss of Cu9Al4 at the Cu-Al Ball–Bond Interface: Explained Based on Full Immersion of Cu, Al, and Cu-Al Intermetallic Galvanic Couples." Journal of Electronic Materials 48, no. 1 (2018): 44–52. http://dx.doi.org/10.1007/s11664-018-6625-7.

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20

Tsiklidis, Evan J., Talid Sinno, and Scott L. Diamond. "Coagulopathy implications using a multiscale model of traumatic bleeding matching macro- and microcirculation." American Journal of Physiology-Heart and Circulatory Physiology 317, no. 1 (2019): H73—H86. http://dx.doi.org/10.1152/ajpheart.00774.2018.

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Quantifying the relationship between vascular injury and the dynamic bleeding rate requires a multiscale model that accounts for changing and coupled hemodynamics between the global and microvascular levels. A lumped, global hemodynamic model of the human cardiovascular system with baroreflex control was coupled to a local 24-level bifurcating vascular network that spanned diameters from the muscular artery scale (0.1–1.3 mm) to capillaries (5–10 μm) via conservation of momentum and conservation of mass boundary conditions. For defined injuries of severing all vessels at each nth-level, the ch

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21

Ezquerro, Lorena Suelves. "« J’avais peur de me faire déporter, mais j’ai demandé de l’aide » : Quand l’immigration par le parrainage se retourne contre les femmes." Anthropologica 62, no. 2 (2020): 406–19. http://dx.doi.org/10.3138/anth-2018-0053.

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Cette recherche explore les effets que produisent les lois ayant trait à l’immigration sur le parcours des femmes parrainées. Le parrainage d’un conjoint ou d’une conjointe, qui facilite le regroupement familial des couples dont un membre réside au Québec et l’autre à l’extérieur du Canada, implique des démarches qui encouragent une « incorporation dépendante » (Roca Girona 2009) à la société d’accueil pour la personne parrainée. Des entrevues semi-dirigées menées auprès de dix femmes ayant été parrainées au Québec montrent que le processus est complexe et crée des relations de pouvoir asymétr

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22

Leckey, Robert. "Profane Matrimony." Canadian journal of law and society 21, no. 2 (2006): 1–23. http://dx.doi.org/10.1017/s0829320100008929.

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RésuméLes débats récents concernant le mariage des couples de même sexe appellent à une réflexion plus large sur la rivalité entre les normes qui prétendent gouverner le mariage. Lors de ces débats, deux prétentions prirent l'avant-scène: l'une voulant que la loi suprême du mariage se trouve dans les traditions religieuses, et l'autre selon laquelle le mariage civil serait purement séculaire et trouverait sa loi suprême dans laCharte canadienne des droits et libertés. Cet article identifie certaines similarités au sein de ces deux prétentions. En particulier, chacune suppose erronément l'unifo

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23

Laursen, Anne Sofie, Elizabeth E. Hatch, Lauren A. Wise, Kenneth J. Rothman, Henrik T. Sørensen, and Ellen M. Mikkelsen. "Preconception Dietary Folate Intake and Risk of Spontaneous Abortion." Current Developments in Nutrition 5, Supplement_2 (2021): 771. http://dx.doi.org/10.1093/cdn/nzab046_068.

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Abstract Objectives Previous studies suggest a beneficial effect of supplemental folic acid use and dietary folate intake on fertility, while results for fetal loss are conflicting. Most previous research on fetal loss focused on folic acid supplement use. We therefore, investigated the association between dietary folate intake and spontaneous abortion (SAB) in a Danish preconception cohort of couples trying to conceive. Methods We recruited couples who were trying to conceive and did not receive fertility treatment. Pregnancies were ascertained through bimonthly follow-up questionnaires compl

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24

Touma, Naji, Jonathan I. Izawa, Mazen Abdelhady, Madeleine Moussa, and Joseph L. Chin. "Ureteral frozen sections at the time of radical cystectomy: reliability and clinical implications." Canadian Urological Association Journal 4, no. 1 (2013): 28. http://dx.doi.org/10.5489/cuaj.770.

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Background: We hypothesized that the incidence of ureteral abnormalitieson frozen section analysis (FS) at the time of radical cystectomyis much lower than historical values and that FS has minimalimpact on outcomes. We also sought to determine the accuracyof FS and the associated costs.Methods: We reviewed the records of 301 patients who underwenta radical cystectomy for urothelial carcinoma of the bladder(UC) between March 2000 and January 2007. The ureteralmargins were sent for FS and subsequent permanent hematoxyllinand eosin (H&E) sections and results were compared. Analyseswere perfo

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25

Ferguson, James C., and Andreas Vieli. "Modelling steady states and the transient response of debris-covered glaciers." Cryosphere 15, no. 7 (2021): 3377–99. http://dx.doi.org/10.5194/tc-15-3377-2021.

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Abstract. Debris-covered glaciers are commonly found in alpine landscapes of high relief and play an increasingly important role in a warming climate. As a result of the insulating effect of supraglacial debris, their response to changes in climate is less direct and their dynamic behaviour more complex than for debris-free glaciers. Due to a lack of observations, here we use numerical modelling to explore the dynamic interactions between debris cover and geometry evolution for an idealized glacier over centennial timescales. The main goal of this study is to understand the effects of debris c

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26

Plane, John M. C. "On the nucleation of dust in oxygen-rich stellar outflows." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 371, no. 1994 (2013): 20120335. http://dx.doi.org/10.1098/rsta.2012.0335.

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Understanding the nature of dust condensation in the outflow from oxygen-rich asymptotic giant branch stars is a continuing problem. A kinetic model has been developed to describe the formation of gas-phase precursors from Ca, Mg, Fe, SiO and TiO in an outflow cooling from 1500 to 1000 K. Electronic structure calculations are used to identify efficient reaction pathways that lead to the formation of metal titanates and silicates. The molecular properties of the stationary points on the relevant potential energy surfaces are then used in a multi-well master equation solver to calculate pertinen

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27

Marcoux, Éric, Benjamin Barré, Michel Pichavant, and Marc Poujol. "Âge et genèse de la coupole granitique à métaux rares (Sn, Li, Nb-Ta, W) de Montebras (Creuse, Massif central français)." BSGF - Earth Sciences Bulletin 192 (2021): 16. http://dx.doi.org/10.1051/bsgf/2020042.

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La coupole de Montebras est un petit massif de granite à métaux rares (Sn, W, Li, Nb-Ta) situé au nord du Massif Central Français qui se met en place au Carbonifère supérieur dans un encaissant plus ancien, le granite de Chanon (357,2 ± 2,1 Ma). Deux épisodes magmatiques, un microgranite (316,1 ± 4,3 Ma) et un leucogranite albitique (309,8 ± 3,9 Ma), sont distingués. Le second développe à son toit des formations de contact, notamment une puissante pegmatite stockscheider (309,7 ± 4,5 Ma), passant vers l’est à des greisens à lithium et des filons plats de quartz stannifères anciennement exploit

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28

Khemiri, Khaoula, and Sihem Jebari. "Évaluation de l’érosion hydrique dans des bassins versants de la zone semi-aride tunisienne avec les modèles RUSLE et MUSLE couplés à un Système d’information géographique." Cahiers Agricultures 30 (2021): 7. http://dx.doi.org/10.1051/cagri/2020048.

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L’érosion hydrique est une préoccupation agronomique, économique et environnementale importante en milieu semi-aride méditerranéen. Le choix de la méthode pour l’estimer dépend des données disponibles et des conditions de la zone d’étude. Cet article vise à quantifier et spatialiser l’érosion hydrique en utilisant l’équation universelle des pertes en sol (Universal Soil Loss Equation [USLE]) dans ses versions modifiée (Modified − MUSLE) et révisée (Revised − RUSLE) et couplées à un Système d’information géographique (SIG) : MUSLE-SIG et RUSLE-SIG. Les données de terrain de deux bassins versant

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29

Dubé, Myriam, Maryse Rinfret-Raynor, and Christine Drouin. "Étude exploratoire du point de vue des femmes et des hommes sur les services utilisés en matière de violence conjugale 1." Santé mentale au Québec 30, no. 2 (2006): 301–20. http://dx.doi.org/10.7202/012150ar.

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Résumé La violence conjugale, longtemps considérée comme un problème privé, est maintenant perçue comme un problème social répandu. Ses effets néfastes sur les femmes, les couples, les enfants et la société sont maintenant mieux connus des différents réseaux d’intervention qui sont dès lors appelés à travailler ensemble afin de développer des approches plus complémentaires basées sur une compréhension commune du problème. Une analyse des mécanismes de concertation intersectorielle mis en place au Québec a été entreprise auprès des intervenants et intervenantes offrant des services en violence

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Li, Xiaojian, Yijia Zhao, Huadong Yao, Ming Zhao, and Zhengxian Liu. "A New Method for Impeller Inlet Design of Supercritical CO2 Centrifugal Compressors in Brayton Cycles." Energies 13, no. 19 (2020): 5049. http://dx.doi.org/10.3390/en13195049.

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Supercritical Carbon Dioxide (SCO2) is considered as a potential working fluid in next generation power and energy systems. The SCO2 Brayton cycle is advantaged with higher cycle efficiency, smaller compression work, and more compact layout, as compared with traditional cycles. When the inlet total condition of the compressor approaches the critical point of the working fluid, the cycle efficiency is further enhanced. However, the flow acceleration near the impeller inducer causes the fluid to enter two-phase region, which may lead to additional aerodynamic losses and flow instability. In this

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31

Vasary, Ildiko. "‘The sin of Transdanubia’: the one-child system in rural Hungary." Continuity and Change 4, no. 3 (1989): 429–68. http://dx.doi.org/10.1017/s0268416000003799.

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Depuis la fin du dix-neuvième siècle on connaissait dans certaines régions de la Hongrie rurale, parmi les petits fermiers protestants un système rigoureux de contrôle de la fécondité. Dans ce soi-disant système à enfant unique les couples cherchaient à obtenir une famille complète à un seul enfant, fût-il garçon ou fille. Une suppression de la fécondité d'une telle ampleur était onéreuse tant pour les conditions matérielles que morales. Dépourvue des ressources d'une société moderne, toute une série de moyens sociaux furent déployés en fonction de ce système. Les modèles de nuptialité, de com

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32

Dionne*, Jean-Claude. "De l’absence de débris grossiers dans les rythmites tidales de la transgression laurentienne, moyen estuaire du Saint-Laurent (Québec)." Géographie physique et Quaternaire 59, no. 1 (2006): 81–89. http://dx.doi.org/10.7202/013739ar.

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Résumé Mises en place lors de la Transgression laurentienne (6 à 5 ka BP) dans le secteur amont du moyen estuaire, les rythmites intertidales limono-sableuses exposées dans la partie supérieure des diverses coupes examinées ne contiennent pas de sédiments détritiques plus grossiers que du sable fin à moyen, alors que la batture vaseuse et argileuse actuelle est couverte de cailloux de tailles variées allant du galet au méga-bloc. Bien que peu abondants, on trouve, par contre, des cailloux dans les trois faciès intertidaux plus récents (0,1 à 0,9 ka) exposés dans la micro-falaise du schorre sup

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PASKHAVER, Borys. "PRICE CIRCUMSTANCES OF THE AGRO-FOOD COMPLEX DEVELOPMENT." Economy of Ukraine 2019, no. 2 (2019): 49–61. http://dx.doi.org/10.15407/economyukr.2019.02.049.

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The main source of financial resources of enterprises of the agro-food complex is the favorable proportions of the purchase and sale prices for goods/services. In the Soviet period, the ratio of prices for input and output of agriculture provided collective farms and state farms with almost 40 percent profitability. Subsequently, hyperinflation of the era of coupon-karbovanets violated price parity in agricultural production, which resulted in the majority of agrarian enterprises being in a zone of loss-making. With the introduction of hryvnia, the parity of price movement in agriculture gradu

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McCaa, Robert. "Marriageways in Mexico and Spain, 1500–1900." Continuity and Change 9, no. 1 (1994): 11–43. http://dx.doi.org/10.1017/s026841600000415x.

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En quoi ce que j'appelle les diverses façons de se marier – mariage (en règie), cohabitation, concubinage – diffèrent-elles en Espagne et au Mexique au début de l'époque moderne? Les âges au moment de la formation du couple et les formes de cohabitation different plus grandement qu'on ne l'imaginait. Au début du XVIe siècle, le mode amérindien de formation du couple est la norme chez les indigènes américains: tout le monde se marie, et cela dès l'âge de la puberté. Dans la péninsule ibérique tout type d'union commence au contraire seulement entre 20 et 25 ans. Avec la conquête et la création d

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Deschodt, Laurent, Mathieu Lançon, Samuel Desoutter, et al. "Exploration archéologique de 170 hectares de plaine maritime (Bourbourg, Saint-Georges-sur-l’Aa, Craywick, Nord de la France) : restitution de la fermeture d’un estuaire au Moyen Âge et mise en évidence de mares endiguées." BSGF - Earth Sciences Bulletin 192 (2021): 12. http://dx.doi.org/10.1051/bsgf/2021004.

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Dans le cadre de l’agrandissement du port de Dunkerque, plus de 170 hectares de la plaine maritime ont été explorés sur la future « Zone Grande Industrie », dans l’ancien estuaire de la Denna (ou Déna, ou L’Enna), sous-bassin du petite fleuve côtier Aa. Le diagnostic d’archéologie préventive classique par ouverture de tranchées a été accompagnée de recherches en archives, de prospections géophysiques, de levés géomorphologiques en sondages en puits (profonds de 3 m) et en coupes. L’intégration des études de nature différente permet d’aboutir à une compréhension du secteur meilleure que ne l’eû

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Sist, Plinio, Lilian Blanc, Lucas Mazzei, Christopher Baraloto, and Raphaël Aussenac. "Nouvelles connaissances sur la dynamique globale de la biomasse après exploitation en forêt nord amazonienne." BOIS & FORETS DES TROPIQUES 314, no. 314 (2012): 41. http://dx.doi.org/10.19182/bft2012.314.a20489.

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L'article présente les effets de l'exploitation forestière sur la dynamique de la biomasse aérienne à partir des résultats issus de l'exploitation commerciale au sein de deux forêts : Cikel dans l'Est du Pará au Brésil et Paracou en Guyane française. L'objectif principal a été de comparer l'impact de ce type d'exploitation sur la régénération de la biomasse aérienne dans ces deux forêts dont les caractéristiques sont différentes en termes de structure et de croissance. Dans les deux sites, l'intensité de l'exploitation s'avère être un facteur essentiel déterminant de la perte de biomasse et le

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Estevão, L. R. M., and R. S. V. Nascimento. "Host-Guest Systems in the Development of Anticorrosive Polymeric Films." MRS Proceedings 576 (1999). http://dx.doi.org/10.1557/proc-576-287.

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ABSTRACTInteractive dispersion-type LDPE/EVA films with anticorrosive properties were produced using host-guest systems of thermally stable volatile corrosion inhibitors (VCI) dicyclohexylammonium p-nitrobenzoate and phosphate, adsorbed on NaY zeolites and diatomaceous earths. Carbon steel specimens were either directly exposed to the inhibiting systems studied or wrapped with the additivated films. Accelerated corrosion tests were carried out where the inhibitive properties of the systems being studied were determined by mass loss of the test coupons. The influence of the mineral support on t

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Lemmens, Karel, and Marc Aertsens. "Validation of glass dissolution and Si diffusion parameters with a combined glass dissolution-diffusion experiment in Boom Clay." MRS Proceedings 932 (2006). http://dx.doi.org/10.1557/proc-932-91.1.

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ABSTRACTExisting knowledge on glass dissolution and silica diffusion in Boom Clay is validated by experiments where both phenomena could be studied simultaneously. SON68 glass coupons, doped with radioactive 32Si, were sandwiched between two cores of fresh humid Boom Clay and heated to 30°C. At the end of the experiment, the system was dismantled, the mass loss of the glass coupon was measured, and the clay core was sliced to determine the diffusion profile of the 32Si dissolved from the glass. These data were completed with analyses of the clay water and surface analyses for analogous tests w

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Inaba, Yuta, Shirley Xu, Jonathan T. Vardner, Alan C. West, and Scott Banta. "Microbially Influenced Corrosion of Stainless Steel by Acidithiobacillus ferrooxidans Supplemented with Pyrite: Importance of Thiosulfate." Applied and Environmental Microbiology 85, no. 21 (2019). http://dx.doi.org/10.1128/aem.01381-19.

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ABSTRACT Microbially influenced corrosion (MIC) results in significant damage to metallic materials in many industries. Anaerobic sulfate-reducing bacteria (SRB) have been well studied for their involvement in these processes. Highly corrosive environments are also found in pulp and paper processing, where chloride and thiosulfate lead to the corrosion of stainless steels. Acidithiobacillus ferrooxidans is a critically important chemolithotrophic acidophile exploited in metal biomining operations, and there is interest in using A. ferrooxidans cells for emerging processes such as electronic wa

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Santos-Ribeiro, S., M. Rodrigues, J. Bellver, et al. "P–787 Impact of delaying ART to promote weight loss: a large multicentre study accounting for the combined effect of female/male age and body mass index (BMI)." Human Reproduction 36, Supplement_1 (2021). http://dx.doi.org/10.1093/humrep/deab130.786.

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Abstract Study question Is postponing the start of ART (to promote a reduction in female BMI) beneficial for cumulative live birth rates (CLBR) when accounting for the female/male ageing this delay will cause? Summary answer Postponing ART treatment in one year to promote female weight loss could be detrimental in women of advanced maternal age (AMA, &gt;35 years-old). What is known already Overweight/obese couples are frequently encouraged to lose weight prior to infertility treatment to enhance ART outcomes. However, a meaningful weight loss is often difficult to achieve for these couple

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De Briey, Valérie. "Numéro 28 - mars 2005." Regards économiques, October 12, 2018. http://dx.doi.org/10.14428/regardseco.v1i0.15993.

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Les Nations Unies ont proclamé l’année 2005 "Année Internationale du Microcrédit". A cette occasion, la Plate-forme belge de la microfinance et la Coopération belge au développement (DGCD) organisent les 3 et 4 mars un séminaire de réflexion sur la microfinance. Dans le dernier numéro de Regards économiques, Valérie de Briey, qui est responsable de recherches au Cerisis, membre de la plate-forme belge de microfinance et du GRAP-OSC (CUD-DGCD), dresse un large panorama du rôle et des missions de la microfinance dans les pays en développement. Elle présente également les questions importantes qu

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De Briey, Valérie. "Numéro 28 - mars 2005." Regards économiques, October 12, 2018. http://dx.doi.org/10.14428/regardseco2005.03.01.

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Les Nations Unies ont proclamé l’année 2005 "Année Internationale du Microcrédit". A cette occasion, la Plate-forme belge de la microfinance et la Coopération belge au développement (DGCD) organisent les 3 et 4 mars un séminaire de réflexion sur la microfinance. Dans le dernier numéro de Regards économiques, Valérie de Briey, qui est responsable de recherches au Cerisis, membre de la plate-forme belge de microfinance et du GRAP-OSC (CUD-DGCD), dresse un large panorama du rôle et des missions de la microfinance dans les pays en développement. Elle présente également les questions importantes qu

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Presue, Francisco J., and R. G. Kelly. "Modeling of Corrosion Protection Provided by an Aluminum-Based Clad Exposed to Atmospheric Conditions." MRS Proceedings 781 (2003). http://dx.doi.org/10.1557/proc-781-z2.4.

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AbstractA computational mass transport framework for occluded region corrosion was extended to study alloys exposed to the thin electrolytes characteristic of atmospheric corrosion. Of interest were the interactions of an aluminum-clad layer with its Al-substrate in the vicinity of a scratch. The model focuses on open circuit conditions and local galvanic couples. Accurate electrochemical kinetics for metallic clad and bare AA2024-T3 are used, including the observed decrease in the pitting potential with increasing chloride concentration. The model has been applied to studies of the parameters

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Setti, A., D. Braga, P. Guilherme, L. Vingris, A. Iaconelli, and E. Borges. "O-224 Paternal ageing impacts blastulation and pregnancy outcomes at different levels of maternal age: a clustering analysis of 21,960 injected oocytes and 3837 ICSI cycles." Human Reproduction 36, Supplement_1 (2021). http://dx.doi.org/10.1093/humrep/deab128.048.

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Abstract Study question Are the morphological parameters and development of in vitro cultured embryos, and intracytoplasmic sperm injection (ICSI) outcomes influenced by maternal and paternal ageing? Summary answer The slopes of maternal age on blastulation, blastocyst quality, and implantation, pregnancy and miscarriage rates significantly changed (worsened) for every year increase in paternal age. What is known already Due to the vast literature demonstrating that female age interferes with intracytoplasmic sperm injection (ICSI) outcomes, there is an imposition, in numerous countries, regar

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Ailane, Sofiane. "Hip-hop." Anthropen, 2016. http://dx.doi.org/10.17184/eac.anthropen.014.

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Le hip-hop englobe quatre expressions artistiques qui sont constitutives de la culture hip-hop : le dj’ing, le rap, le breakdance et le graffiti. Le rap est une forme de « parler-chanter » exécuté sur des rythmes de bases produits par le Disc Jockey (DJ). Le breakdance est l’expression corporelle du hip-hop, c’est une danse à dimension athlétique, dont l’esthétique se base sur la rupture du flux dans des mouvements amples et fluides. Le graffiti correspond à l’art graphique du hip-hop, ces peintures se donnent à voir généralement sur le mobilier urbain au travers de fresques colorées, mais bie

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Desveaux, Emmanuel. "Parenté." Anthropen, 2019. http://dx.doi.org/10.17184/eac.anthropen.102.

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Au milieu du XIXe siècle, Henry L. Morgan, un avocat américain puritain, fait une découverte considérable : dans toutes les langues humaines, il existe un ensemble de termes servant à désigner les différents types de parents. Si ces mots appartiennent à la langue, la façon dont se répartit leur usage répond à des principes logiques qui la dépassent dans la mesure où ils se retrouvent dans des langues voisines — ou éloignées — qui n’ont rien de commun. La somme des termes de parenté d’une langue forme ainsi une nomenclature, et celle-ci est, de façon universelle, égocentrée. Le fait qui illustr

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Laurent, Pierre-joseph, and Lionel Simon. "Ruse." Anthropen, 2016. http://dx.doi.org/10.17184/eac.anthropen.037.

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En Occident, la ruse (en tant que raison raisonnée, délibérée, contextuelle) fut progressivement, et surtout depuis Descartes, reléguée aux oubliettes d’une rationalité calculatrice, économique, quantitative. La raison rusée semble survivre, dans nos sociétés, à la périphérie des rapports sociaux, de manière indicible, voir inaudible, car nous n’aurions plus les mots pour en saisir les vertus. Déclassée, bien souvent considérée comme suspecte face aux principes de la démocratie, nous en avons perdu la compréhension, à la suite d’un rapprochement analogique entre la ruse et l’idée de mal. Ainsi

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Van dyck, Marie-claire, and Emmanuel Gilissen. "Évolution." Anthropen, 2016. http://dx.doi.org/10.17184/eac.anthropen.010.

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Ce concept, fondamental en biologie, a fortement influencé l’anthropologie avant qu’elle ne le conteste. Il importe toutefois de préciser que c’est bien toutes les disciplines qui se trouvent, de par la nature de leur objet, confrontées au changement, qui ont été amenées à réfléchir aux mécanismes auxquels ce dernier obéit (Richelle 2009). La question de l’évolution s’est donc posée avant, et en dehors des hypothèses évolutionnistes formulées en biologie. Ainsi, les travaux de Marc Zuer van Boxhorn (1602 ?-1653) et de William Jones (1746-1794), précurseurs de la linguistique historique qui all

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Bullock, Emily. "Re-Writing Suburbia." M/C Journal 5, no. 2 (2002). http://dx.doi.org/10.5204/mcj.1947.

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Whilst urban growth is generally accepted as a global phenomenon, this has numerous and ambivalent implications for Australia and its identity-work. Suburbia the site where the majority of Australians live, located somewhere between the privileged spaces of the city and the bush comes into focus as the emblematic topos through which the representational work of nation is articulated. Here, space becomes imbued with much current Australian political import. This article puts the discursive representation of Australian suburbia into juncture with hegemonic formations of nationness, and posits po

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Moussaoui, Abderrahmane. "Violence." Anthropen, 2019. http://dx.doi.org/10.17184/eac.anthropen.123.

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Le terme violence qualifie un certain nombre de manifestations allant de l’altercation verbale jusqu’aux destructions de masse, en passant par l’agression physique, le viol, le meurtre, la torture, les mutilations, etc. Infligées ou subies, discontinues ou constantes, localisées ou endémiques, accidentelles ou motivées, ces expressions de la violence se compliquent encore par leur caractère tantôt privé, tantôt public, assumé et revendiqué ou dissimulé et renié. La violence est si protéiforme qu’elle ne cesse de voir les discriminants de sa catégorisation et les grilles de classification se dé

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