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Artículos de revistas sobre el tema "Temps de vol orthogonal"

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Publicado: 25 de mayo de 2024

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1

Zaoui, Pierre. "Le capitalisme comme vol du temps". Vacarme 53, n.º 4 (2010): 29. http://dx.doi.org/10.3917/vaca.053.0029.

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2

Casalta, H. "Les spectromètres à temps de vol". Le Journal de Physique IV 10, PR1 (enero de 2000): Pr1–15—Pr1–26. http://dx.doi.org/10.1051/jp4:2000102.

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3

de Broucker, T. "« Le temps ne suspend pas son vol… »". Pratique Neurologique - FMC 2, n.º 1 (febrero de 2011): 34–36. http://dx.doi.org/10.1016/j.praneu.2010.12.002.

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4

Iommi Amunátegui, Godofredo. "L’algèbre à l’épreuve du temps". Revue des questions scientifiques 192, n.º 3-4 (1 de diciembre de 2021): 403–8. http://dx.doi.org/10.14428/qs.v192i3-4.70093.

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Analyse critique de : Gavin (Jérôme) – Schärlig (Alain), Et l’algèbre fut : de l’al-jabr au 9 e siècle au signe égal en 1557. – Lausanne : Presses polytechniques et universitaires romandes, 2020. – 168 p. – 1 vol. broché de 16 × 24 cm. – isbn 978-2-88915-400-5.
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5

Spanin, Michel. "Le temps accepta de faire un vol supplémentaire". Chimères 49, n.º 1 (2003): 179–85. http://dx.doi.org/10.3406/chime.2003.1264.

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6

Ananthaswamy, Anil. "Peut-on mesurer le temps de vol quantique ?" Pour la Science N° 545 – mars, n.º 3 (20 de febrero de 2023): 66–73. http://dx.doi.org/10.3917/pls.545.0066.

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7

Spanin, Michel. "Le temps accepta de faire un vol supplémentaire". Chimères N° 49, n.º 1 (1 de marzo de 2003): 179–85. http://dx.doi.org/10.3917/chime.049.0179.

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8

Willis, John D., Guy Bedouelle y Bernard Roussel. "Le temps des Reformes et la Bible. Bible de Tous les Temps. Vol. 5." Sixteenth Century Journal 22, n.º 1 (1991): 115. http://dx.doi.org/10.2307/2542022.

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9

Sekulovski, Jordančo y Lindita Ahmeti. "Кон Sylviane Agacinski, Le passeur de temps. Modernité et nostalgie". Identities: Journal for Politics, Gender and Culture 5, n.º 2 (1 de junio de 2006): 177–79. http://dx.doi.org/10.51151/identities.v5i2.197.

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Author(s): Jordančo Sekulovski | Јорданчо Секуловски Title (Macedonian): Кон Sylviane Agacinski, Le passeur de temps. Modernité et nostalgie Title (Albanian): Për Sylviane Agacinski, Le passeur de temps. Modernité et nostalgie Translated by (Macedonian to Albanian): Lindita Ahmeti Journal Reference: Identities: Journal for Politics, Gender and Culture, Vol. 5, No. 2 (Summer 2006) Publisher: Research Center in Gender Studies - Skopje and Euro-Balkan Institute Page Range: 177-179 Page Count: 3 Citation (Macedonian): Јорданчо Секуловски, „Кон Sylviane Agacinski, Le passeur de temps. Modernité et nostalgie“, Идентитети: списание за политика, род и култура, т. 5, бр. 2 (лето 2006): 177-179. Citation (Albanian): Jordančo Sekulovski, „Për Sylviane Agacinski, Le passeur de temps. Modernité et nostalgie“, përkthim nga Maqedonishtja Lindita Ahmeti, Identities: Journal for Politics, Gender and Culture, Vol. 5, No. 2 (Summer 2006): 177-179.
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10

Le Moal, Sylvain y Thomas Rolland. "Janvier 2019 : Vol de nuit ; Le temps est bouillonnant". La Météorologie, n.º 105 (2019): 78. http://dx.doi.org/10.4267/2042/70175.

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11

Christian, CLAUDE, LANGRIDGE Jim, BORDOLI Bob, HOYES John y ASHCROFT Alison. "Séquençage de protéines par couplage quadripole-temps de vol". Biofutur 1997, n.º 164 (febrero de 1997): 11–12. http://dx.doi.org/10.1016/s0294-3506(97)86998-0.

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12

Le Fur, E., T. Wentz, O. El Kabbaj, J. Roman, D. Visvikis y O. Pradier. "Évaluation du repositionnement en radiothérapie par caméra temps de vol". Cancer/Radiothérapie 17, n.º 5-6 (octubre de 2013): 623–24. http://dx.doi.org/10.1016/j.canrad.2013.07.106.

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13

Demortier, Guy. "Compte rendu de Jacques Léon : «À la recherche de l’espace et du temps perdus»". Revue des questions scientifiques 190, n.º 1-2 (1 de enero de 2019): 235–36. http://dx.doi.org/10.14428/qs.v190i1-2.70413.

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14

Soussan, M., J. L. Galas, M. J. Ouvrier, G. Pop, A. Neuman y P. Weinmann. "Impact clinique de la technique du temps-de-vol en TEP". Médecine Nucléaire 35, n.º 7 (julio de 2011): 401–5. http://dx.doi.org/10.1016/j.mednuc.2011.05.005.

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15

Buisseret, Fabien. "Compte rendu de Stéphane Collion : «Voyage dans les mathématiques de l’espace-temps : trous noirs, big-bang, singularités»". Revue des questions scientifiques 190, n.º 3-4 (1 de diciembre de 2019): 479–80. http://dx.doi.org/10.14428/qs.v190i3-4.71673.

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Collion (Stéphane), Voyage dans les mathématiques de l’espace-temps : trous noirs, big-bang, singularités. – Les Ulis : EDP sciences, 2019. – 208 p. – (Une introduction à). – 1 vol. broché de 17 × 24 cm. – 29,00 €. – isbn 978-2-7598-2279-9.
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16

Eisner, Tímea y Margit Pap. "Discrete orthogonality of the analytic wavelets in the Hardy space of the upper half plane". International Journal of Wavelets, Multiresolution and Information Processing 15, n.º 03 (7 de marzo de 2017): 1750024. http://dx.doi.org/10.1142/s0219691317500242.

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We will prove that the analytic orthogonal wavelet-system, which was introduced by Feichtinger and Pap in [Hyperbolic wavelets and multiresolution in the Hardy space of the upper half plane, in Blaschke Products and Their Applications: Fields Institute Communications, Vol. 65 (Springer, New York, 2013), pp. 193–208] is discrete orthogonal too. We will discuss the discrete orthogonality and the properties of the reproducing kernel functions of the introduced wavelet-spaces.
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17

Icart, Joaquim. "Apunts sobre els conceptes de temps de Jean Piaget". Comunicació educativa, n.º 20 (1 de enero de 2007): 67. http://dx.doi.org/10.17345/comeduc200767-74.

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Al meu parer, hi ha un detall que crec que és molt important i on Jean Piaget no hi va voler entrar: l’espai i el temps com a intuïcions pures de l’enteniment, i com a condició prèvia per a la nostra facultat de pensar, tal com ho havia entès Plató (s.V-IV aC), i va recollir també E. Kant (1970). Així doncs, en aquest treball es vol fer una crítica argumentada d’aquest oblit tot i reconeixent la immensa tasca realitzada per aquest gran científic i pensador.
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18

Moulahi, H., J. L. Guarneiri, D. Trystram, J. Y. Gauvrit, S. Godon-Hardy, J. P. Pruvo y J. F. Méder. "NR37 Guide d’interpretation de l’ARM 3D temps de vol des arteres intracraniennes". Journal de Radiologie 86, n.º 10 (octubre de 2005): 1512. http://dx.doi.org/10.1016/s0221-0363(05)76092-3.

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19

Ngatcha-Ribert, Laëtitia y Jean-Manuel Morvillers. "Les Unités Cognitivo-Comportementales : des espaces où le temps suspend son vol". Gérontologie et société 45, n.º 2 (10 de agosto de 2023): 141–56. http://dx.doi.org/10.3917/gs1.171.0141.

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Les Unités Cognitivo-Comportementales (UCC) sont des unités spécialisées dans la prise en soins et l’accompagnement de personnes valides (en capacité de se déplacer seules) qui présentent des troubles importants du comportement – appelés « troubles du comportement perturbateurs » – en rapport avec une maladie neurodégénérative. Basé sur une recherche ethnographique dans 5 UCC de la région Île-de-France et des entretiens auprès de professionnels, de personnes malades elles-mêmes et d’aidants familiaux, cet article analyse au sein de ces unités les enjeux liés aux espaces et aux aménagements, centraux dans l’accompagnement de ces patients, et en particulier les usages des espaces de ces unités par les patients, les aidants et les professionnels qui y travaillent.
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20

Noack, Bernd R. "From snapshots to modal expansions – bridging low residuals and pure frequencies". Journal of Fluid Mechanics 802 (1 de agosto de 2016): 1–4. http://dx.doi.org/10.1017/jfm.2016.416.

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Data-driven low-order modelling has been enjoying rapid advances in fluid mechanics. Arguably, Sirovich (Q. Appl. Maths, vol. XLV, 1987, pp. 561–571) started these developments with snapshot proper orthogonal decomposition, a particularly simple method. The resulting reduced-order models provide valuable insights into flow physics, allow inexpensive explorations of dynamics and operating conditions, and enable model-based control design. A winning argument for proper orthogonal decomposition (POD) is the optimality property, i.e. the guarantee of the least residual for a given number of modes. The price is unpleasant frequency mixing in the modes which complicates their physical interpretation. In contrast, temporal Fourier modes and dynamic mode decomposition (DMD) provide pure frequency dynamics but lose the orthonormality and optimality property of POD. Sieber et al. (J. Fluid Mech., vol. 792, 2016, pp. 798–828) bridge the least residual and pure frequency behaviour with an ingenious interpolation, called spectral proper orthogonal decomposition (SPOD). This article puts the achievement of the TU Berlin authors in perspective, illustrating the potential of SPOD and the challenges ahead.
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21

Zhang, Xifang, Zhenqiang Yao, Haifeng Du, Jiacheng Song, Zhiyi Jin y Wei Xu. "Wettability and Frictional Studies of PEEK Composites against Co-Cr Alloys with Surface Textures". Polymers 15, n.º 19 (6 de octubre de 2023): 4006. http://dx.doi.org/10.3390/polym15194006.

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With the aim of promoting the qualities for total hip joint replacement, the wettability and tribological behaviors of PEEK composites pins with two sets of different fillers (PEEK/CF or PEEK/CF/PTFE/graphite) against Co-Cr alloy discs with five categories of surface textures (polished, orthogonal, spiral, r-θ, and orthogonal combined with spiral) were explored. It is revealed that the existence of CF in PEEK matrix increases the hydrophilicity in addition to the strength of PEEK, while the addition of PTFE increases the hydrophobicity of PEEK. The Co-Cr alloy discs with hydrophilic properties can be adjusted as hydrophobic, with the depth of textured grooves exceeding the critical sag height determined by the contact angle and the groove width. It can be concluded that PEEK/CF/PTFE/graphite composite has a lower wear rate than PEEK only reinforced with CF against Co-Cr alloy, both without surface texture and with shallow or deep grooves. The existence of shallow grooves on the disc surface could help the PEEK blends to achieve a steady friction against Co-Cr alloy in addition to collecting the worn debris. PEEK blend pins with 10 vol% CF, 10 vol% PTFE and 10 vol% graphite can achieve a lower friction coefficient of no more than 0.2 against Co-Cr alloy discs with shallow grooves around 3.5 μm in orthogonal or spiral textures.
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22

D’Udekem-Gevers, Marie. "Compte rendu de David S. Landes : «L’heure qu’il est : les horloges, la mesure du temps et la formation du monde moderne»". Revue des questions scientifiques 190, n.º 1-2 (1 de enero de 2019): 218–20. http://dx.doi.org/10.14428/qs.v190i1-2.69613.

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Landes (David S.), L’heure qu’il est : les horloges, la mesure du temps et la formation du monde moderne / traduit de l’anglais par Pierre-Emmanuel Dauzat et Louis Évrard. – Paris : Société d’édition « Les Belles Lettres », 2017. – 632 p. – (Histoire ; 137). – 1 vol. broché de 15 × 21,5 cm. – 29,50 €. – isbn 978-2-251-44657-8.
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23

Malagarriga, Teresa. "Fem música junts". Comunicació educativa, n.º 22 (1 de enero de 2009): 17. http://dx.doi.org/10.17345/comeduc200917-19.

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La música és complexa. Aprendre música per poder-ne fer ús requereix temps, ja que en l’activitat musical hi ha implicades habilitats que cal educar, al mateix temps que la música com a producte cultural s’ha de conèixer, saber percebre, analitzar i valorar. És tot un aprenentatge que pot durar al llarg de la vida, però que té un aspecte vertaderament interessant: i és que, en qualsevol moment i nivell que s’estigui, la música pot arribar a la sensibilitat i a la intel·ligència de qui vol comprendre-la i gaudir-ne, provocant vivències per sentir i aportant recursos per comunicar-se amb els altres i entendre algunes de les dimensions que aquest llenguatge conté.
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24

Hartmann, Wilfried. "Jean Imbert, Les temps carolingiens (741-891). Vol. 1: L'église: Les institutions; Vol. 2: L'église: La vie des fidèles". Zeitschrift der Savigny-Stiftung für Rechtsgeschichte: Kanonistische Abteilung 85, n.º 1 (1 de agosto de 1999): 544–45. http://dx.doi.org/10.7767/zrgka.1999.85.1.544.

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25

Olson, Jeannine E., Thomas Lambert y Isabella Watt. "Registres du Consistoire de Geneve au temps de Calvin. Vol. 1 (1542-1544)." Sixteenth Century Journal 29, n.º 2 (1998): 550. http://dx.doi.org/10.2307/2544551.

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26

Gargett, Graham, Rene Pomeau y Christiane Mervaud. "Voltaire en son temps. Vol. III: De la Cour au jardin: 1750-1759". Modern Language Review 89, n.º 4 (octubre de 1994): 1006. http://dx.doi.org/10.2307/3733946.

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27

Combes, Annie. "Le roman des récits croisés : le vol du temps dans la Suite du Merlin". Le Moyen Age CXV, n.º 3 (2009): 583. http://dx.doi.org/10.3917/rma.153.0583.

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28

Carls, Alice-Catherine, Claude Michel Cluny y Claude Michel Cluny. "Le Silence de Delphes: Journal littéraire, 1948-1962. Vol. 1 of L'lnvention du temps". World Literature Today 77, n.º 3/4 (2003): 111. http://dx.doi.org/10.2307/40158252.

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29

Carlier, T., L. Ferrer, E. Garin, C. Bodet-Milin, T. Eugène, C. Rousseau, C. Ansquer, F. Schoenahl y F. Kraeber-Bodéré. "Imagerie TEP à l’yttrium 90 : activité minimale détectable avec ou sans temps de vol". Médecine Nucléaire 36, n.º 4 (abril de 2012): 166. http://dx.doi.org/10.1016/j.mednuc.2012.02.033.

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30

Portal, Michael. "Introduction to ‘Session Six’ of ‘Donner – le temps’ (Given Time vol. 2)". Derrida Today 17, n.º 2 (junio de 2024): 126–30. http://dx.doi.org/10.3366/drt.2024.0335.

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31

Chua Abdullah, Muhammad Ilman Hakimi, Abu Bakar Sulong, Norhamidi Muhamad, Mohd Fazuri Abdullah y Che Hassan Che Haron. "Optimization of Injection Parameters Using 16µm Stainless Steel Powder (SS316L) at 63 Vol. %, 63.5 Vol. % and 64 Vol. % Powder Loading by Taguchi Method for Metal Injection Molding". Key Engineering Materials 471-472 (febrero de 2011): 558–62. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.558.

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In this paper, injection molding parameters are optimized using the L18 Taguchi orthogonal array for mechanical strength and surface quality of the green part. The feedstock used consists of stainless steel powder (SS316L) with the powder loading of 63 vol. %, 63.5 vol. % & 64 vol. %. The binder compositions used are polyethelene glycol (PEG-73 wt.%), polymethyl methacrilate (PMMA-25 wt.%) and stearic acid (4 wt.%). Mould temperature, injection temperature, injection pressure, injection time, holding time and powder loading ware selected as signal factors using Taghuci’s method based on literature, where these parameters were significant in MIM. Results showed that the optimum parameters are: mold temperature at 650C, injection temperature at1450C, injection pressure at 650 bar, injection flow rate at 20 m3/s, holding time at 5 s and powder loading of 64 vol.%. Analysis of Variance (ANOVA) result shown that mold temperature is the most influence in order to produce good green part’s surface quality while powder loading give the best result for green part’s strength.
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32

Li, Ziqian, Gang Li, Chong Wang, Wei Li y Huaping Zheng. "Optimization Design of Mix Proportion for Fly Ash–Silica Fume–Basalt Fiber–Polypropylene Fiber Concrete under Steam Curing Condition". Materials 17, n.º 9 (24 de abril de 2024): 1971. http://dx.doi.org/10.3390/ma17091971.

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To enhance the physical and mechanical characteristics of steam-cured concrete, an orthogonal experimental design was utilized to examine the effects of varying contents of fly ash (0 wt%, 10 wt%, 15 wt%, 20 wt%), silica fume (0 wt%, 5 wt%, 10 wt%, 15 wt%), basalt fiber (0 vol%, 0.05 vol%, 0.1 vol%, 0.2 vol%), and polypropylene fiber (0 vol%, 0.05 vol%, 0.1 vol%, 0.2 vol%) on its mechanical properties. Utilizing range and variance analyses, this study identified four preliminary optimized compositions of concrete incorporating fly ash, silica fume, basalt fiber, and polypropylene fiber. On this basis, in order to determine the optimal mix proportion, the mechanical performances, the pore characteristics, and the microstructure of four optimized mix proportions were analyzed. According to the results of macroscopic, fine, and microscopic multi-scale tests, the addition of 15 wt% fly ash, 10 wt% silica ash, 0.2 vol% basalt fiber, and 0.1 vol% polypropylene fiber to the steamed concrete is the best to improve the performance of the steamed concrete. Compared to ordinary concrete, the compressive strength increases by 28%, the tensile strength increases by 40%, and the porosity decreases by 47.2%.
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33

Gélinas, René, Yany Grégoire, Luc Pellerin y Alain Halley. "Le juste-à-temps et les PME : une expérience de partenariat avec la Division See-Doo/Ski-Doo de Bombardier". Revue Organisations & territoires 22, n.º 1-2 (1 de mayo de 2013): 77–86. http://dx.doi.org/10.1522/revueot.v22n1-2.230.

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34

Libert, Michel. "Niche temporelle : la partition du temps de vol quotidien chez les Epitola Westwood (Lepidoptera, Lycaenidae)". Bulletin de la Société entomologique de France 98, n.º 3 (1993): 209–15. http://dx.doi.org/10.3406/bsef.1993.17886.

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35

Andújar Gutiérrez, Juan José, José Luis López del Amo y Michel Marina Evrard. "Caracterització del temps de vol en relació amb variables biomecàniques de l’estirada en l’arrencada d’halterofília". Apunts Educació Física i Esports, n.º 118 (30 de diciembre de 2014): 68–78. http://dx.doi.org/10.5672/apunts.2014-0983.cat.(2014/4).118.07.

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36

Corretti, Carolyn. ":Registres du Consistoire de Genève au Temps de Calvin. Vol. 5, (1550—1551)". Sixteenth Century Journal 42, n.º 3 (1 de septiembre de 2011): 852–53. http://dx.doi.org/10.1086/scj23076541.

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37

Milovanovic, Gradimir, Miroslav Pranic y Miodrag Spalevic. "Quadrature with multiple nodes, power orthogonality, and moment-preserving spline approximation, part II". Applicable Analysis and Discrete Mathematics 13, n.º 1 (2019): 1–27. http://dx.doi.org/10.2298/aadm180730018m.

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The paper deals with new contributions to the theory of the Gauss quadrature formulas with multiple nodes that are published after 2001, including numerical construction, error analysis and applications. The first part was published in Numerical analysis 2000, Vol. V, Quadrature and orthogonal polynomials (W. Gautschi, F. Marcellan, and L. Reichel, eds.) [J. Comput. Appl. Math. 127 (2001), no. 1-2, 267-286].
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38

MO, XIAOHUAN y HONGMEI ZHU. "ON A CLASS OF PROJECTIVELY FLAT FINSLER METRICS OF NEGATIVE CONSTANT FLAG CURVATURE". International Journal of Mathematics 23, n.º 08 (10 de julio de 2012): 1250084. http://dx.doi.org/10.1142/s0129167x1250084x.

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In this paper, we prove a structure theorem for projectively flat Finsler metrics of negative constant flag curvature. We show that for such a Finsler metric if the orthogonal group acts as isometries, then the Finsler metric is a slight generalization of Chern–Shen's construction Riemann–Finsler geometry, Nankai Tracts in Mathematics, Vol. 6 (World Scientific Publishing, Hackensack, NJ, 2005), x+192 pp.
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39

Lessa, Sergio. "Leitores de Luk´acs". Tematicas 2, n.º 3 (28 de septiembre de 1994): 127–32. http://dx.doi.org/10.20396/tematicas.v2i3.11733.

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Comentário dos livros: BROWNE, Paul. "Lukács later Ontology", in Science and Society, vol. 54, nº 2, 1990. OLDRINI, Guido. "Gramsci e Lukács Avversari del Marxismo della II Internazionale", in Giornale Critico della Filosofia Italiana, fasc. II, Maio/Agosto, 1991. OLDRINI, Guido. "Lukács e la via marxista al concetto di persona", in Marxismo Oggi, Julho, 1993. TERTULIAN, Nicolas. "Le concept d'aliénation chez Heidegger et Lukács", in Archives de Philosophie, Julho/Setembro, 1993. TERTULIAN, Nicolas. "Georg Lukács et le Stalinisme", in Les Temps Modernes, nº 563, Julho/Setembro, 1993.
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40

Soussan, M., S. Djelbani, J. Negroni, S. Louafi, B. Helal, P. Wind y I. Buvat. "Évaluation du TEP/IRM temps de vol dans la stadification et re-stadification des cancers colorectaux". Médecine Nucléaire 41, n.º 3 (mayo de 2017): 156. http://dx.doi.org/10.1016/j.mednuc.2017.02.052.

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41

Regina, Christophe. "« Toutes les femmes sont perfides, artificieuses, vaniteuses, curieuses et dépravées : toutes les femmes, non, mais... la sœur Marie-Thérèse de la Croix, si ! »". Source(s) – Arts, Civilisation et Histoire de l’Europe, n.º 11 (20 de octubre de 2022): 55–67. http://dx.doi.org/10.57086/sources.250.

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« Toutes les femmes sont perfides, artificieuses, vaniteuses, curieuses et dépravées : toutes les femmes, non, mais... la sœur Marie-Thérèse de la Croix, si ! » — Il est difficile de mettre en lumière une destinée aussi sombre que celle prêtée à la mère supérieure du refuge d’Aix-en-Provence. Si l’on en croit son plus illustre publiciste, le poète provençal Jean de Cabanes, Marie-Thérèse de Languisière, dite « La Sœur de la Croix », aurait été l’une des plus grandes criminelles de son temps, aucune forme de culpabilité ne lui aurait été étrangère : prostitution, travestissement, maquerellage, sorcellerie, vol, mauvais traitements, faux-monnayage furent autant d’activités que de passions pour la Soeur de la Croix. Cet article propose d’interroger l’histoire de la prostituée devenue religieuse qui, pendant plus de quatorze ans, au tournant des XVIIe et XVIIIe siècles, fit la pluie et le beau temps à Aix-en-Provence, forte de ses puissants appuis au Parlement, vivier principal de sa clientèle, à en croire Jean de Cabanes. Ce dernier, à bien des égards, en fait une figure sadienne avant la lettre.
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42

Santisteban, Antoni. "Diccionari d'Història de Catalunya". Comunicació educativa, n.º 5 (30 de diciembre de 2013): 55. http://dx.doi.org/10.17345/comeduc199255-56.

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En aquest Diccionari d’Història de Catalunya escrit per Jesús Mestres, Josep M. Salrach i Josep Termes, la història de Catalunya ha estat classificada en conceptes, fets i idees històriques, personatges, organismes de la vida cultural i institucions, d'història, però també d'economia, de dret o de religió, tot desordenat en el temps, però unificat a través de l'alfabet. La història així presentada vol ser una ajuda a qui davant d'un text històric vulgui aclarir un dubte o saber quelcom més d'un personatge, de manera ràpida, accedint a les idees principals o per situar un concepte o un esdeveniment en un context.
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43

Beausse, J., M. Letort y M. R. De Roubin. "L'analyse environnementale des Hépatotoxines : La spectrométrie de masse en temps de vol couplée à la chromatographie liquide". Journal européen d’hydrologie 34, n.º 2 (2003): 211–20. http://dx.doi.org/10.1051/water/20033402211.

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44

GRAMSTAD, ODIN y KARSTEN TRULSEN. "Can swell increase the number of freak waves in a wind sea?" Journal of Fluid Mechanics 650 (19 de marzo de 2010): 57–79. http://dx.doi.org/10.1017/s0022112009993491.

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The effect of a swell on the statistical distribution of a directional short-wave field is investigated. Starting from Zakharov's spectral formulation, we derive a new modified nonlinear Schrödinger equation appropriate for the nonlinear evolution of a narrow-banded spectrum of short waves influenced by a swell. The swell-modified equation is solved analytically to yield an extended version of the result of Longuet-Higgins & Stewart (J. Fluid Mech., vol. 8, no. 4, 1960, pp. 565–583) for the modulation of a short wave riding on a longer wave. Numerical Monte Carlo simulations of the long-term evolution of a spectrum of short waves in the presence of a monochromatic swell are employed to extract statistical distributions of freak waves among the short waves. We find evidence that a realistic short-crested wind sea can on average experience a small increase in freak wave probability because of a swell provided the swell is not orthogonal to the wind waves. For orthogonal swell and wind waves we find evidence that there is almost no significant change in the probability of freak waves in the wind sea. If the short waves are unrealistically long crested, such that the Benjamin–Feir index serves as indicator for freak waves (Gramstad & Trulsen, J. Fluid Mech., vol. 582, 2007, pp. 463–472), it appears that the swell has much smaller relative influence on the probability of freak waves than in the short-crested case.
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45

Arnold, D. J., Y. M. Stokes y J. E. F. Green. "Thin-film flow in helically-wound rectangular channels of arbitrary torsion and curvature". Journal of Fluid Mechanics 764 (23 de diciembre de 2014): 76–94. http://dx.doi.org/10.1017/jfm.2014.703.

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AbstractLaminar helically-symmetric gravity-driven thin-film flow down a helically-wound channel of rectangular cross-section is considered. We extend the work of Stokes et al. (Phys. Fluids, vol. 25 (8), 2013, 083103) and Lee et al. (Phys. Fluids, vol. 26 (4), 2014, 043302) to channels with arbitrary curvature and torsion or, equivalently, arbitrary curvature and slope. We use a non-orthogonal coordinate system and, remarkably, find an exact steady-state solution. We find that the free-surface shape and flow have a complicated dependence on the curvature, slope and flux down the channel. Moderate to large channel slope has a significant effect on the flow in the region of the channel near the inside wall, particularly when the curvature of the channel is large. This work has application to flow in static spiral particle separators used in mineral processing.
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46

Zhai, Jing, Zi Feng Ni y Qing Zhong Li. "An Alkaline SiO2 Slurry for Fine Atomizing CMP". Advanced Materials Research 279 (julio de 2011): 258–61. http://dx.doi.org/10.4028/www.scientific.net/amr.279.258.

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A kind of slurry which is applicable for fine atomizing CMP was made and the optimal results were obtained through orthogonal experiments by comparing fine atomizing CMP and traditional CMP. The research results show that the material removal rate of fine atomizing CMP is 52.23% of traditional CMP, and the dosage of the slurry used in fine atomizing CMP only accounts for 10 vol% compared to traditional CMP. The surface roughness after the fine atomizing CMP is 2.5nm which is better than that of the traditional CMP (3.0nm).
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47

Geetha, Narayanan Kannaiyan, Pappuula Bridjesh y Perumal Sekar. "Influence of Ethanol as Gasoline Blend on Spark Ignition Engine". Oriental Journal Of Chemistry 35, n.º 5 (5 de octubre de 2019): 1491–99. http://dx.doi.org/10.13005/ojc/350503.

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This study analyzes the influence of ethanol as gasoline blend on a spark ignition engine and a mathematical tool is proposed based on multi attribute decision making approach to select optimal combination of operating parameters of a variable compression ratio multi fuel engine considering objective, subjective and integrated weights of attributes. Test fuels used were ethanol-gasoline blends having ethanol in proportions of 10, 20, 30 and 40 vol %. The compression ratio was varied as 6, 7, 8 and 9. The load was varied as 25, 50, 75 and 100%. A series of 16 experiments were conducted by adopting Taguchi based design of experiments resulting in L16 orthogonal array. The result of proposed method shows that the combination of compression ratio 6, ethanol-gasoline blend 30 vol% at a load of 75% is found to the best choice from among other trails and was validated using graph theory matrix approach
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48

Wang, Jian-Zhi, Yi-Chin Tang y Yun-Hwei Shen. "Leaching of Sm, Co, Fe, and Cu from Spent SmCo Magnets Using Organic Acid". Metals 13, n.º 2 (26 de enero de 2023): 233. http://dx.doi.org/10.3390/met13020233.

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In this study, the Taguchi method was used to investigate the effect of citric acid and malic acid on the leaching of SmCo magnet waste. First, we used a L16(45) orthogonal table to conduct experiments. Second, we conducted a factor effect analysis on the experimental results of the orthogonal table to understand the influence of temperature, acid concentration, solid–to–liquid ratio, time, and hydrogen peroxide on the leaching efficiency and we obtained the priority order of the factors affecting the leaching efficiency. The priorities of citric acid and malic acid were H2O2 > temperature > S/L > time > acid and temperature > time > S/L > H2O2 > acid, respectively. Finally, the optimal leaching parameters were obtained through confirmation experiments. For optimal leaching rates with citric acid, the amount of hydrogen peroxide (H2O2) added was 2.0 vol.%, the temperature was 90 °C, the S/L ratio was 5 g L−1, the time was 135 min and the acid concentration was 1.0 mol L−1, resulting in leaching efficiencies of Sm, Co, Fe, and Cu of 87.62, 93.82, 97.10, and 92.84%, respectively. For optimal leaching rates with malic acid, the temperature was 80 °C, the time was 75 min, the S/L ratio was 7.5 g L−1, the amount of hydrogen peroxide added was 3.5 vol.%, and the acid concentration was 1.5 mol L−1, resulting in leaching efficiencies of Sm, Co, Fe, and Cu of 75.18, 74.58, 82.42, and 1.35%, respectively.
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49

Fournier, Sylvain, Jérôme Chevalier, Saray Perez-Robles, Claudia Carotenuto, Mario Minale, Helen Reveron y Guilhem P. Baeza. "Spreading ceramic stereolithography pastes: Insights from shear- and orthogonal-rheology". Journal of Rheology 68, n.º 1 (21 de diciembre de 2023): 83–97. http://dx.doi.org/10.1122/8.0000688.

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We study the shear rheological behavior of a commercial stereolithography paste containing ≈50 vol. % of zirconia particles (diameter ≈ 100 nm) with the aim to clarify physical mechanisms occurring during the “scraping” step of this yield stress fluid. Beyond a flow curve characterized by a high zero-shear viscosity accompanied with an overall shear-thinning behavior, we investigate in a systematic way the transient regime through start-up experiments. We demonstrate that a structural transition occurs between 10−2 and 10−1 s−1, resulting in an apparent interruption of the shear-thinning. The corresponding transient response presents a pronounced extra-growth of the shear stress before to stabilize at high strain amplitude and a negative first normal stress difference peak, both effects become stronger at higher shear rates. These observations are rationalized based on the high interparticle friction owing to the polyhedral shape and the roughness of the particles. In addition, relaxation tests following the start-up experiments reveal that the samples submitted to shear rates higher than 10−1 s−1 cannot relax the shear stress to the same level as in low shear rate experiments, suggesting a durable structural modification likely to impact the quality of the parts prior to their debinding and densification. Finally, we utilize orthogonal superposition rheology to illustrate how the application of an oscillatory deformation during the scraping procedure could help to reduce the shear-thinning interruption and improve the stereolithography processing as already observed empirically during scraping.
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50

Srikhao, Natwat, Korrapat Chirochrapas, Nessaraporn Kwansanei, Pornnapa Kasemsiri, Artjima Ounkaew, Manunya Okhawilai, Chutiwat Likitaporn, Somnuk Theerakulpisut y Hiroshi Uyama. "Multi-Responsive Optimization of Novel pH-Sensitive Hydrogel Beads Based on Basil Seed Mucilage, Alginate, and Magnetic Particles". Gels 8, n.º 5 (27 de abril de 2022): 274. http://dx.doi.org/10.3390/gels8050274.

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Conventional drug delivery systems often cause side effects and gastric degradation. Novel drug delivery systems must be developed to decrease side effects and increase the efficacy of drug delivery. This research aimed to fabricate hydrogel beads for use as a drug delivery system based on basil seed mucilage (BSM), sodium alginate (SA), and magnetic particles (MPs). The Taguchi method and Grey relational analysis were used for the design and optimization of the hydrogel beads. Three factors, including BSM, SA, and MPs at four levels were designed by L-16 orthogonal arrays. BSM was the main factor influencing bead swelling, drug release rate at pH 7.4, and release of antioxidants at pH 1.2 and 7.4. In addition, SA and MPs mainly affected drug loading and drug release rate in acidic medium, respectively. Grey relational analysis indicated that the composition providing optimal overall properties was 0.2 vol% BSM, 0.8 vol% SA, and 2.25 vol% MPs. Based on the findings of this work, BSM/SA/MPs hydrogel beads have the potential to be used as a pH-sensitive alternative material for drug delivery in colon-specific systems.
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