Letteratura scientifica selezionata sul tema "Pavage du plan"
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Articoli di riviste sul tema "Pavage du plan"
1
Jacob-Da Col, Marie-Andrée. "Applications quasi-affines et pavages du plan discret". Theoretical Computer Science 259, n. 1-2 (maggio 2001): 245–69. http://dx.doi.org/10.1016/s0304-3975(00)00006-2.
Testo completo
2
Nivat, Maurice. "Sous-ensembles homogènes de et pavages du plan". Comptes Rendus Mathematique 335, n. 1 (gennaio 2002): 83–86. http://dx.doi.org/10.1016/s1631-073x(02)02377-4.
Testo completo
3
Salon, Olivier. "Quelles tuiles ! (Pavages apériodiques du plan et automates bidimensionnels)". Journal de Théorie des Nombres de Bordeaux 1, n. 1 (1989): 1–26. http://dx.doi.org/10.5802/jtnb.1.
Testo completo
4
Hayes, Ryan J., William M. Wintermantel, Patricia A. Nicely e Edward J. Ryder,. "Host Resistance to Mirafiori lettuce big-vein virus and Lettuce big-vein associated virus and Virus Sequence Diversity and Frequency in California". Plant Disease 90, n. 2 (febbraio 2006): 233–39. http://dx.doi.org/10.1094/pd-90-0233.
Testo completoAbstract (sommario):
Big vein is an economically damaging disease of lettuce (Lactuca sativa) caused by the Olpidium brassicae-vectored Mirafiori lettuce big-vein virus (MLBVV). Lettuce big-vein associated virus (LBVaV) is also frequently identified in symptomatic plants, but no causal relationship has been demonstrated. Although big vein is a perennial problem in the United States, the extent of MLBVV and LBVaV infection and diversity is unknown. Lettuce cultivars partially resistant to big vein reduce losses, but do not eliminate disease. While Lactuca virosa does not develop big vein symptoms, it has not been tested for infection with MLBVV or LBVaV. Lettuce cultivars Great Lakes 65, Pavane, Margarita, and L. virosa accession IVT280 were evaluated for big vein incidence and virus infection in inoculated greenhouse trials. Additional lettuce samples were collected from field sites in California, classified for symptom severity, and evaluated for virus infection. Reverse transcription-polymerase chain reaction and nucleotide sequencing were used to determine infection with MLBVV and LBVaV, and sequence diversity among viral isolates, respectively. Infections with MLBVV and MLBVV/LBVaV were dependent on big vein symptom expression in California production areas, and isolates were closely related to those found in Europe and Japan. Partial big vein resistance was identified in Margarita and Pavane; however, MLBVV infection was found in asymptomatic plants. L. virosa IVT280 remained symptomless and virus free, suggesting that it is immune to MLBVV and LBVaV.
5
Meulenbroek, E. J., C. P. J. van de Lindeloof e H. J. Kanne. "'PAVANA' A NEW STRAWBERRY CULTIVAR FROM PLANT RESEARCH INTERNATIONAL". Acta Horticulturae, n. 567 (gennaio 2002): 183–85. http://dx.doi.org/10.17660/actahortic.2002.567.35.
Testo completo
6
Zong, Chuanming. "Can You Pave the Plane with Identical Tiles?" Notices of the American Mathematical Society 67, n. 05 (1 maggio 2020): 1. http://dx.doi.org/10.1090/noti2075.
Testo completo
7
VIGNESHWARAN, ANBUKKARASU, MAXIM S. KULIKOVSKIY, ANTON GLUSHCHENKO, JOHN PATRICK KOCIOLEK e BALASUBRAMANIAN KARTHICK. "A new species of Cymbella (Bacillariophyceae, Cymbellaceae) from the Pavana River, Western Ghats, India". Phytotaxa 395, n. 3 (11 marzo 2019): 209. http://dx.doi.org/10.11646/phytotaxa.395.3.5.
Testo completoAbstract (sommario):
New diatom species from the genus Cymbella is described, Cymbella pavanaensis from the Pavana River situated in Pimpri-Chinchwad, Pune, Maharashtra, India. The new species description is based on detailed LM and SEM morphological observations. Comparison of the new species with similar, previously-described taxa is made. C. pavanaensis belongs to a group of small-celled species of the genus, which lack differentiated, rounded porelli comprising the apical pore fields. This taxon is reported from a moderately to the highly-polluted urban lotic system, which signifies that even the diatom flora of easily accessible habitats of India is yet to be fully documented.
8
Bavaresco, Luigi, Ginevra Canavera, Maria Giulia Parisi e Luigi Lucini. "Role of foliar biostimulants (of plant origin) on grapevine adaptation to climate change". BIO Web of Conferences 56 (2023): 01002. http://dx.doi.org/10.1051/bioconf/20235601002.
Testo completoAbstract (sommario):
Heat waves and drought stress are typical aspects of current climate change, significantly affecting the grapevine physiology in many world growing areas. Biostimulants can play an important role in reducing the negative effects of climate change; that’s why this experiment was set up in order to test two new foliar biostimulants (protein hydrolysates of plant origin). The field experiment was carried out in 2017 and 2018 in Oltrepo pavese area (Lombardia region, northwest Italy, 270 m asl), on a six-year-old vineyard of V. vinifera L. cv. Merlot clone 181 grafted on Gravesac, Guyot trellis, 4,000 vines/ha and not irrigated. Two new protein hydrolysates of plant origin were sprayed twice, just after fruit set and 15 days later, by using 2.5 L/ha. Leaf proteomics and metabolomics were studied in 2017, while productive and qualitative data were recorded in both years at harvest (September 1st, 2017 and August 28th 2018). The most significant findings were: (a) the treatments slowed down the grape ripening, by stimulating vegetative activity and reducing sugar accumulation; (b) less heat and drought stress symptoms were observed in the canopies of treated vines, as compared to the control ones.
9
Pilla, Giorgio, e Patrizio Torrese. "Hydrochemical-geophysical study of saline paleo-water contamination in alluvial aquifers". Hydrogeology Journal 30, n. 2 (26 gennaio 2022): 511–32. http://dx.doi.org/10.1007/s10040-021-02446-5.
Testo completoAbstract (sommario):
AbstractAn integrated hydrochemical and geophysical study of the saline paleo-water uprising into the alluvial aquifer of the Oltrepò Pavese plain sector (Po Plain, northern Italy) is presented. This study involved hydrochemical analysis of groundwater, assessment of well logs, and one-, two- and three-dimensional electrical geophysical surveys. The studied area was selected for its characteristic hydrogeological setting. The alluvial aquifer is strongly conditioned by the presence of a buried tectonic discontinuity along which the saline waters are mainly distributed. These waters rise along the discontinuities in the bedrock and flow into the overlying alluvial aquifer. Contamination from saline waters is not spatially and vertically homogeneous within the aquifer. The spatial distribution of Na–Cl waters suggests the existence of plumes of highly mineralized waters that locally reach the aquifer, diffuse and mix with freshwaters. The saline waters show a dilution during upward migration, which is due to mixing with the shallow fresh groundwater. Highly mineralized groundwater is identified even at very shallow depth in correspondence with each plume. On the other hand, there is a lower degree of contamination in those sectors of the aquifer that are further away from the structural discontinuities and this lesser contamination generally only involves the deeper parts of the aquifer.
10
Guo, Rui Ping, e Chun Lin Yang. "Variance of Atmosphere Dispersion Factor for Accident Release from Nuclear Power Plant". Advanced Materials Research 518-523 (maggio 2012): 1242–46. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.1242.
Testo completoAbstract (sommario):
The growing concern over the effect of atmosphere dispersion resulted from radioactive material was noticeable. This paper demonstrated the variance of atmosphere dispersion factor for accident release from nuclear power plant through running PAVAN (Atmospheric Dispersion of Radioactive Releases from Nuclear Power Plants) model. Also, we investigated the effect of release height (short for H) on atmosphere dispersion factor and compared the correlation between atmosphere dispersion factor and dispersion distance. Our results showed that atmosphere dispersion factor would descend with increased release height. As dispersion distance increasing, the tendency of atmosphere dispersion factor expressed complicated status caused by the difference of wind direction. It was illustrated that the phenomena was caused by the integrated action between the wind direction and release height. The probability distribution of atmosphere dispersion factor also validated that the distribution was depend on the wind direction. Probability analysis indicated that the atmosphere dispersion factor under H=100m was overall less than that under H=75m.
Tesi sul tema "Pavage du plan"
1
Petite, Samuel. "Laminations et pavages du demi-plan hyperbolique". Phd thesis, Université de Bourgogne, 2005. http://tel.archives-ouvertes.fr/tel-00011423.
Testo completoAbstract (sommario):
Cette th{è}se traite des propri{é}t{é}s des syst{è}mes dynamiques associ{é}s aux pavages du planeuclidien $\R^2$ et du demi-plan hyperbolique \H. Un pavage de $\R^2$ ou de \H, code une action
d'un groupe d'isom{é}tries (soit le groupe des translations du plan, soit le groupe des
transformations affines) sur un espace m{é}trique compact $\Omega$ de sorte que les propri{é}t{é}s de
cette action sont reli{é}es avec les propri{é}t{é}s combinatoires du pavage. Les actions obtenues par
cette mani{è}re ont des comportements tr{è}s vari{é}s. Pour certains cas, comme par exemple pour le
pavage de Penrose, cette action est libre et minimale. Ceci donne {à} l'espace $\Omega$ une structure
de lamination particuli{è}re appell{é}e {\it sol{é}no{\"\i}de}. Localement, cet espace est le produit d'un
ensemble de Cantor par un ouvert du plan euclidien (resp. hyperbolique). Dans cette th{è}se, nous
{é}tudions principalement le comportement statistique des orbites de telles actions. Pour cela nous
caract{é}risons les mesures finies invariantes pour ces actions ainsi que les mesures harmoniques des
sol{é}no{\"\i}des associ{é}s. Il apparait des diff{é}rences fondamentales dans les techniques utilis{é}es entre
le cas euclidien et le cas hyperbolique. Nous donnons de plus, pour tout entier $r\geq 1$ des
exemples explicites de pavages du demi-plan hyperbolique dont le syst{è}me dynamique associ{é} est une
action libre et minimale poss{é}dant $r$ mesures finies invariantes et ergodiques.
2
Elbaz, Mounir. "Sur les diagrammes de Voronoi et de Delaunay dans le plan et dans l'espace". Mulhouse, 1992. http://www.theses.fr/1992MULH0210.
Testo completoAbstract (sommario):
La construction du diagramme de Voronoi est un problème fondamental de l'algorithmique géométrique et a des applications en cristallographie, en physique, en chimie, en climatologie, en géographie et en informatique. Etant donné un ensemble fini S de n points dans le plan ou dans l'espace tridimensionnel E on associe à chaque point s de S l'ensemble V(s) des points de E plus proches de s que de tous les autres sites de S. Les ensembles V(s) définissent un diagramme appelé le diagramme de Voronoi de S. Le dual géométrique de ce diagramme est appelé le diagramme de Delaunay et est noté Del(S). Un algorithme, variante des algorithmes de Lee et Schachter, Guibas et Stolfi, de construction de ces diagrammes en O(nlogn) dans le plan utilisant les cartes est présenté. La notion de pavage qui généralise à l'espace celle de la carte est utilisée pour l'algorithme de construction des diagrammes dans l'espace. Cet algorithme est en O(n2) ce qui est optimal. Il résoud tous les cas particuliers et détermine le diagramme de Delaunay et non une tétraédrisation qui le raffine. Nos algorithmes sont, en plus, robustes. Ils utilisent des approximations géométriques de nature angulaire et permettent d'avoir pour toute similitude T, T(Del(S)) = Del(T(S))
3
Remila, Eric. "Pavage de figures par des barres et reconnaissance de graphes sous-jacents à des réseaux d'automates". Lyon 1, 1992. http://www.theses.fr/1992LYO10037.
Testo completoAbstract (sommario):
La première partie de cette thèse est centrée sur le problème de l'existence et de l'exhibition effective de pavages de figures finies du PLDAN, avec deux barres (l'une horizontale HM, l'autre verticale VN) avec l'idée de produire des algorithmes de pavages de complexité satisfaisante (linéaire). Nous donnons d'abord trois algorithmes de pavage par H2 et V2 : le premier très général est une conséquence directe de la théorie des couplages d'un graphe; le second permet de paver en temps linéaire toute figure horizontalement convexe. Enfin, nous indiquons un algorithme de pavage d'une figure sans trou, du A W. P. Thurston. Dans le cas général, nous donnons un algorithme de pavage des trapèzes. En introduisant la notion de col, nous donnons un algorithme de pavage des figures horizontalement convexes. Ce même algorithme se généralise à une classe de figures plus grande (figures sans pont). Dans la deuxième partie, nous reprenons les travaux de P. Rosensthiel et de A. Wu et A. Rosenfeld sur la reconnaissance de graphes sous-jacents à un réseau d'automates : nous généralisons la reconnaissance d'un rectangle aux structures classiques : tore, cylindre, moebius et sphère. Pour ce faire, nous avons introduit des méthodes (dans un espace discret) analogues à celles de la géométrie différentielle
4
Monson, Björn. "Pavages de la droite réelle, du demi-plan hyperbolique et automorphismes du groupe libre". Thesis, Université Côte d'Azur (ComUE), 2017. http://www.theses.fr/2017AZUR4060/document.
Testo completoAbstract (sommario):
Dans cette thèse, nous construisons des pavages de la droite réelle et du demi-plan hyperbolique à l’aide de représentants efficaces d’automorphismes IWIP du groupe libre Fn. Dans un premier temps, nous utilisons la substitution définie par P. Arnoux, V. Berthé, A. Siegel, A. Hilion associée à un représentant efficace d’un automorphisme IWIP pour générer des espaces de pavages substitutifs apériodiques de la droite réelle. Nous montrons, en nous servant d’un théorème de connexité des représentants efficaces d’automorphismes IWIP dû à J. Los, que le type topologique de ces espaces de pavages est indépendant du choix du représentant. Nous associons ainsi, à homéomorphisme près, un espace de pavages de la droite réelle à une classe d’automorphisme externe IWIP de Fn, puis à une classe de conjugaison d’un élément IWIP dans Out(Fn). D’autre part, nous construisons à partir des éléments de l’espace de pavage de la droite réelle précédemment construits des pavages faiblement apériodiques pour le groupe des transformations affines du demi-plan hyperbolique. Nous étudions les propriétés topologiques et dynamiques de ces espaces de pavages du plan hyperbolique. Enfin, dans une dernière partie, nous montrons que les espaces de pavages précédemment construits peuvent être munis d’une structure lisse en se servant de leur structure de limite projectiveIn this thesis, we construct tilings of the real line and the hyperbolic half-plane using train-track maps of IWIP free group automorphisms. One the one hand, we use a substitution defined by P. Arnoux, V. Berthé, A. Siegel, A. Hilion coming from a train-track map of a IWIP free group automorphism to generate substitutive aperiodic tilings of the real line. We show, thanks to a theorem of J. Los about connectivity of train-track representatives of an IWIP automorphism, that the topological type of those tiling spaces is the same up to a choice of train-track representative. Thus we associate, up to an homeomorphism, a tiling space of the real line to a class of an IWIP outer automorphism of Fn, then we extend this result to a conjugacy class of an IWIP element in Out(Fn). On the other hand, we construct from elements of tiling spaces of the real line previously defined, a set of weakly aperiodic for the affine group tilings of the hyperbolic half-plane. We study topological et dynamical properties of the tiling space generated by those hyperbolic tilings. Finally, in the last section we endow tiling spaces previously constructed with a smooth structure thanks to their inverse limit structure
5
Le, Gloannec Bastien. "Coloriage du plan discret par jeux de tuiles déterministes". Thesis, Orléans, 2014. http://www.theses.fr/2014ORLE2069/document.
Testo completoAbstract (sommario):
Nous étudions dans ce mémoire les propriétés des ensembles de pavages engendrés par des jeux de tuiles de Wang exhibant une ou plusieurs directions de déterminisme local, en accordant une importance toute particulière aux jeux déterministes dans les quatre directions diagonales simultanément, dits 4-way déterministes. Après avoir proposé une construction alternative d’un jeu de tuiles apériodique 4-way déterministe, nous étudions plusieurs problèmes de décision sur ces objets et complétons en particulier le résultat d’indécidabilité du problème du pavage dans le cadre 4-way déterministe établi par Lukkarila en montrant l’indécidabilité du problème du pavage périodique 4-way déterministe. Nous montrons également que des familles complexes de coloriages du plan telles que celles engendrées par les substitutions restent sofiques dans un cadre 4-way déterministe. Nous proposons une bi-déterminisation des constructions de jeux de tuiles point-fixe de Durand, Romashchenko et Shen et en tirons quelques premières applications. Enfin, nous considérons l’opportunité d’élargir le rayon de la règle locale de déterminisme afin de limiter les directions d’expansivité et ainsi de permettre la construction localement déterministe de systèmes de particules et collisions non triviaux. Nous introduisons un nouveau modèle syntaxique commode afin de travailler à rayon deux et revisitons des problématiques de Lukkarila dans ce cadreIn this thesis, we study some properties of the sets of tilings generated by Wang tilesets that exhibit one or more directions of local determinism, focusing in particular on tilesets that are simultaneously deterministic in the four diagonal directions, referred to as 4-way deterministic. After having exposed an alternative construction of a 4-way deterministic aperiodic tileset, we study several decision problems on these objects and complete in particular Lukkarila’s result of undecidability of the Domino Problem in the 4-way deterministic setting proving the undecidability of the 4-way deterministic periodic Domino Problem. We also prove that some complex families of colorings of the plane such that those generated by substitutions remain sofic in the 4-way deterministic setting. We propose a bi-determinization of the constructions by Durand, Romashchenko and Shen of fixed-point tilesets and give some first applications. Finally, we investigate the idea of extending the radius of the local rule of determinism in order to reduce the set of directions of expansiveness and thus allow the local realization of non-trivial particles and collisions systems. We introduce a new and convenient syntactic model to deal with radius two and revisit some of Lukkarila’s problems in this setting
6
Thiant, Nicolas. "Constructions et reconstructions de pavages de dominos". Paris 6, 2006. http://www.theses.fr/2006PA066418.
Testo completoAbstract (sommario):
Cette thèse est une contribution à l'étude de problèmes de pavages par des dominos. Nous montrons comment élargir au cas d'un polyomino avec des trous la méthode de Thurston qui permet de paver en temps linéaire un polyomino sans trous par des dominos. Nous présentons un algorithme de pavage de complexité O(kn) pour un polyomino avec n cellules et k trous. En particulier, cet algorithme est linéaire pour un polyomino avec un nombre borné de trous. Nous exposons aussi l'état de nos recherches sur le problème du pavage de cardinalité maximale et, plus généralement, sur celui du couplage maximum dans un graphe biparti plan. Nous présentons un algorithme original de couplage dont la complexité reste encore à déterminer. Nous considérons enfin le problème de la reconstruction du pavage d'un rectangle à partir de ses projections orthogonales. Ce problème connu depuis une dizaine d'années restait non résolu. Nous présentons un algorithme polynomial qui réalise cette reconstruction.
7
Kiwan, Rola. "Problèmes d'optimisation liés aux valeurs propres du Laplacien et aux pavages du plan [et] problèmes d'évolutions semi-linéaires". Tours, 2007. http://www.theses.fr/2007TOUR4001.
Testo completoAbstract (sommario):
On a montré dans cette thèse un résultat d'optimisation de la première valeur propre du Laplacien de Dirichlet pour des domaines du plan avec symétrie diedrale, et un autre résultat pour la seconde valeur propre des domaines sphériques (problème de placement optimal). Dans une deuxième partie on a étudié le problème isopérimétrique, pour les pavage de plan. Dans la partie analyse, on a étudié l'explosion en temps fini des solutions d'une équation, et d'un système parabolique avec terme non local ainsi qu'une inéquation hyperbolique non linéaireIn this thesis, we consider first the optimal placement problem for the first Dirichlet Laplacian eingenvalue for plane domains with dihidral symetry, we then consider the same problem for the second eigenvalue of spherical shells. We solve the isoperimetric problem for plane domains who tile the plane by the action of a given lattice. Finally we study sufficient conditions for explosion in finite time for the solution of a non local parabolic problem as well as hyperbolic inequality
8
Galanov, Ilya. "Sur l’auto-assemblage de pavages octogonaux plans de type fini". Thesis, Paris 13, 2019. http://www.theses.fr/2019PA131018.
Testo completoAbstract (sommario):
L'auto-assemblage est le processus dans lequel les composants d'un système, qu'il s'agisse de molécules, de polymères, de colloïdes ou de particules macroscopiques, s'organisent en structures ordonnés à la suite d'interactions locales entre les composants eux-mêmes, sans intervention extérieure. Cette thèse concerne l'auto-assemblage de pavages apériodiques. Les pavages apériodiques (le pavage Penrose en est un exemple célèbre) servent de modèle mathématique pour les quasi-cristaux - les cristaux qui n'ont pas la symétrie de translation. En raison de la disposition atomique spécifique de ces cristaux, la question de savoir comment ils se forment reste toujours sans réponse. L'objectif de cette thèse est de développer un algorithme de croissance pour une classe particulière de pavages apériodiques - les pavages octogonaux de type fini. Afin d'imiter la croissance de quasi-cristaux réels, nous demandons que l'algorithme soit local: les pièces doivent être ajoutées une par une, en utilisant uniquement les informations locales et aucune donnée ne doit être stockée entre les étapes. Les simulations corroborent la conjecture que l'algorithme que nous avons mis au point permet de former des pavages apériodiques, modulo une proportion inévitable mais négligeable de pavés manquantsSelf-assembly is the process in which the components of a system, whether molecules, polymers, or macroscopic particles, are organized into ordered structures as a result of local interactions between the components themselves, without exterior guidance. This thesis is devoted to the self-assembly of aperiodic tilings. Aperiodic tilings serve as a mathematical model for quasicrystals - crystals that do not have any translational symmetry. Because of the specific atomic arrangement of these crystals, the question of how they grow still remains open. Our aim is to develop a growth algorithm for a particular class of aperiodic tilings - octagonal tilings of finite type. In order to mimic the growth of real-world quasicrystals, we demand the algorithm be local: the tiles must be added one by one, using only the local information and no data must be stored between the steps. Simulations strongly support the evidence that this algorithm grows aperiodic tilings, up to an unavoidable but neglectable proportion of missing tiles
9
Simonet, Matthieu. "Mots de retours et pavages dans les plans sturmiens". Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENM103.
Testo completoAbstract (sommario):
Les mots sturmiens sont une façon de coder les droites discrètes apériodiques. Ils ont été étudiés depuis la fin du 19ème siècle et disposent de nombreuses caractérisations. L'une d'elles, obtenue par Vuillon, est centrée sur la notion de mot de retour.Cette thèse a pour objet l'étude des mots sturmiens en dimension 2 vus comme codages des plans discrets apériodiques. L'objectif est d'aller vers une caractérisation des mots sturmiens bi-dimensionnels analogue à celle obtenue par Vuillon en dimension 1.Mais des problèmes propres à la dimension 2 rendent cette étude délicate, tels l'absence de concaténation de mots ou la difficulté à localiser un facteur au sein d'un mot. Afin d'y faire face, nous introduisons en dimension 2 les notions de motifs, motifs pointés, mots de localisation et mots de retour. Nous obtenons ainsi un prolongement à la dimension 2 d'un théorème de Morse et Hedlund concernant certains mots de retour dans un mot sturmien.Ce résultat nous permet d'établir un nouvel algorithme de fractions continues et nous permet de proposer, dans un cadre restreint, une notion de suite dérivéeSturmian words are a way to encode aperiodic discrete lines. They have been studied since the end of the 19th century and can be characterized in many ways. One of these characterizations, obtained by Vuillon, centers around the notion of return words.This thesis aims to study 2-dimensional Sturmian words as encodings of aperiodic discrete planes. It is a first step towards a characterization of 2-dimensional Sturmian words analogous to that of Vuillon in dimension 1.However, concerns specific to dimension 2, such as the impossibility to concatenate words or the difficulty to locate a factor inside a word make the study much trickier. To tackle this, we introduce in dimension 2 notions of patterns, pointed patterns, localization words and return words.We obtain a 2-dimensional version of a theorem of Morse and Hedlund concerning certain return words in a Sturmian word. This result enables us to establish a new continued-fractions algorithm and to introduce, in a restricted setting, a notion of derived sequence
10
Vanneuville, Hugo. "Percolation dans le plan : dynamiques, pavages aléatoires et lignes nodales". Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1262/document.
Testo completoAbstract (sommario):
Dans cette thèse, nous étudions trois modèles de percolation planaire : la percolation de Bernoulli, la percolation de Voronoi, et la percolation de lignes nodales. La percolation de Bernoulli est souvent considérée comme le modèle le plus simple à définir admettant une transition de phase. La percolation de Voronoi est quant à elle un modèle de percolation de Bernoulli en environnement aléatoire. La percolation de lignes nodales est un modèle de percolation de lignes de niveaux de champs gaussiens lisses. Deux fils conducteurs principaux ont guidé nos travaux. Le premier est la recherche de similarités entre ces modèles, en ayant à l'esprit que l'on s'attend à ce qu'ils admettent tous la même limite d'échelle. Nous montrons par exemple que le niveau critique de la percolation de lignes nodales est égal au niveau auto-dual (à savoir le niveau zéro) lorsque le champ considéré est le champ de Bargmann-Fock, qui est un champ gaussien analytique naturel. Le deuxième fil conducteur est l'étude de dynamiques sur ces modèles. Nous montrons en particulier que, si on considère un modèle de percolation de Voronoi critique et si on laisse les points se déplacer selon des processus de Lévy stables à très longue portée, alors il existe des temps exceptionnels avec une composante non bornéeWe study three models of percolation in the plane: Bernoulli percolation, Voronoi percolation, and nodal lines percolation. Bernoulli percolation is often considered as the simplest model which admits a phase transition. Voronoi percolation is a Bernoulli percolation model in random environment. Nodal lines percolation is a level lines percolation model for smooth planar Gaussian fields. We have followed two main threads. The first one is the resarch of similarities between these models, having in mind that we expect that they admit the same scaling limit. We show for instance that the critical level for nodal lines percolation is the self-dual level (namely the zero level) if the Gaussian field is the Bargmann-Fock field, which is natural analytical field. The second main thread is the study of dynamics on these percolation models. We show in particular that if we sample a critical Voronoi percolation model and if we let each point move according to a long range stable Lévy process, then there exist exceptional times with an unbounded cluster
Libri sul tema "Pavage du plan"
1
Parrington, John. Redesigning Life. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198766834.001.0001.
Testo completoAbstract (sommario):
We can now edit genomes. The technique, which involves cutting and pasting DNA code into the genome, is faster and cheaper than traditional genetic engineering and can be used on almost any animal or plant. What will this technology mean for the future? It may pave the way to banishing many diseases, and help feed the burgeoning population of the world. Woolly mammoths may again roam the tundra. But are there also risks? Might a nightmarish world of bioterrorism and rogue synthetic organisms await? John Parrington reports on the astonishing revolution underway in genetic engineering and why it matters to us all.
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Mukama, Evode, e Laurent Nkusi. Ubushakashatsi mu Bumenyi Nyamuntu n’Imibanire y’Abantu. African Minds, 2019. http://dx.doi.org/10.47622/9781928331971.
Testo completoAbstract (sommario):
Research in developed countries is often considered as a means to pave the way towards sustainable development in different areas of the society including science and technology, the economy, governance and security. Researchers in developing countries rarely have the opportunity to use their indigenous languages to design, plan and conduct research. Nor do they communicate in their indigenous languages to share their insights and learnings from other parts of the world with colleagues or students. Utilising the languages that researchers, students and teachers, policymakers, the community, and others interested in research understand better can help to generate new knowledge embedded in local realities where sustainable development needs to take root. That is why this book is in Kinyarwanda. The authors hope that writing this book in Kinyarwanda will increase research capacity in the humanities and social sciences in Rwanda and in the region. And that it will increase interaction between all key stakeholders in the planning and conducting of research as well as in analysing, monitoring and evaluating the research process and its outputs.]
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Skorzewska, Anna, e Allan D. Peterkin. Why Are the Health Humanities Relevant (and Vital) in Postgraduate Medical Education? Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190849900.003.0001.
Testo completoAbstract (sommario):
This introductory chapter provides a short history of medical humanities and continues on to give an overview of the limits of medical practice, evidence-based medicine (EBM), successes and failures, curricula, and the current state of medical humanities. The medical and health humanities have become a widespread discipline, with journals, institutes, and associations worldwide. Throughout undergraduate medical education, new courses, electives, programs, and research are proliferating. Yet there is very little officially documented about relevance and efficacy in postgraduate medical education. The chapters that follow provide both a rigorous argument for using the arts and humanities in postgraduate medical education and a practical “how-to” that will guide readers in developing arts and humanities initiatives in their own program or medical school. Each chapter provides ideas, hands-on lesson plans, and resources to pave the way forward.
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Amin, Hanudin, e Abdul Rahim Abdul Rahman. Islamic Banking: An Introduction to Islamic Accounting. UMS Press, 2016. http://dx.doi.org/10.51200/islamicbankingumspress2016-978-967-0521-67-1.
Testo completoAbstract (sommario):
Islamic Banking: An Introduction to Islamic Accounting is written with the purpose of sensitizing readers to the need of accounting according to the al-Quran and Sunnah, Islamic accounting concepts, and accounting for Islamic financial transactions. The knowledge and skills gained from the course is able to add value to the students in order to prepare themselves for their career advancement. It is expected that, this topic of Islamic accounting will pave the way of disseminating the complete Islamic finance discipline to those students. Objectively, the book plans to communicate the pivotal contents of Islamic accounting both theoretically and practically. With these skills, the students are hoped to apply them into the real world once they have graduated. The book provides comprehensive coverage of Islamic accounting ranging from introduction, salam accounting to zakat accounting which are interesting to learn. The intended audience of the book are undergraduate and postgraduate students who love to learn Islamic banking not only from its concepts but also towards the applications of the concepts.
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Vandergriff, Donald. Manning the Future Legions of the United States. Praeger, 2008. http://dx.doi.org/10.5040/9798400682537.
Testo completoAbstract (sommario):
An Industrial Age model continues to shape the way the Army approaches its recruiting, personnel management, training, and education. This outdated personnel management paradigm—designed for an earlier era—has been so intimately tied to the maintenance of Army culture that a self-perpetuating cycle has formed, diminishing the Army's attempts to develop adaptive leaders and institutions. This cycle can be broken only if the Army accepts rapid evolutionary change as the norm of the new era. Recruiting the right people, then having them step into an antiquated organization, means that many of them will not stay as they find their ability to contribute and develop limited by a centralized, hierarchical organization. Recruiting and retention data bear this out. Several factors have combined to force the Army to think about the way it develops and nurtures its leaders. Yet, Vandergriff maintains, mere modifications to today's paradigm may not be enough. Today's Army has to do more than post rhetoric about adaptability on briefing slides and in literature. One cannot divorce the way the Army accesses, promotes, and selects its leaders from its leadership-development model. The Army cannot expect to maintain leaders who grasp and practice adaptability if these officers encounter an organization that is neither adaptive nor innovative. Instead, Army culture must become adaptive, and the personnel system must evolve into one that nurtures adaptability in its policies, practices, and beliefs. Only a detailed, comprehensive plan where nothing is sacred will pave the way to cultural evolution.
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Clavio, Galen. Social Media and Sports. Human Kinetics, 2017. http://dx.doi.org/10.5040/9781718221000.
Testo completoAbstract (sommario):
Social media communications play a huge role in the day-to-day operations of sport teams and organizations. Both current and aspiring sport business professionals need to know how to best leverage social media to meet their organizational goals, and Social Media and Sports With HKPropel Access will help pave the way by emphasizing the strategic, creative, and logistical elements of effective social media practices. Beginning with foundational concepts, students will first examine the history of social media and its impact on sports. They will learn about the categories of content used, including written content, images, produced video, live video, audio, graphics, dynamic visuals, and responses. They will then gain a better understanding of the social media environment by learning how to think about audiences and networks, evaluating how online communities act and interact, and considering key issues that may be encountered. The final chapters of the text assemble the building blocks from previous chapters into practical application, covering brand management strategies and overall social media presence from the perspective of a member of the sports media, a representative of a team or league, or an individual athlete. Related online learning aids, delivered via HKPropel and reviewed annually to stay current with evolving trends, provides a detailed look into major social networks and their technological elements, plus best practices, tips, and tricks for utilizing a variety of social media platforms. It also examines content methodologies, including podcasting, live video, and prerecorded video, and it discusses the use of social management software. Markers throughout the text refer students to the web resource when additional related content is available. Learning aids for students include Professional Insights, sidebars containing interviews with industry insiders; these real-world examples and professional advice provide depth and context to each chapter's content. Key Points highlight important points, end-of-chapter review questions promote practical application and ensure content comprehension, and bolded key terms are defined in an easy-to-reference glossary. Social Media and Sports offers a practical approach to understanding social media communications in the sports industry, with application extending to those working in journalism, public relations, broadcasting, advertising, and other sport business careers where knowledge of effective social media usage will maximize career potential.
Capitoli di libri sul tema "Pavage du plan"
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Azimova, Shakhnoza S., e Anna I. Glushenkova. "Schizanthus pinnatus Ruiz-Pavone." In Lipids, Lipophilic Components and Essential Oils from Plant Sources, 916. London: Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_2940.
Testo completo
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Whitzman, Carolyn. "WHAT DO YOU WANT TO DO? PAVE PARKS? Urban Planning and the Prevention of Violence". In Change of Plans, 89–110. Toronto: University of Toronto Press, 1996. http://dx.doi.org/10.3138/9781442602427-008.
Testo completo
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Sazeides, Christos, e Anne Le. "Metabolic Relationship Between Cancer-Associated Fibroblasts and Cancer Cells". In The Heterogeneity of Cancer Metabolism, 189–204. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65768-0_14.
Testo completoAbstract (sommario):
AbstractCancer-associated fibroblasts (CAFs), a major component of the tumor microenvironment (TME), play an important role in cancer initiation, progression, and metastasis. Recent findings have demonstrated that the TME not only provides physical support for cancer cells but also directs cell-to-cell interactions (in this case, the interaction between cancer cells and CAFs). As cancer progresses, the CAFs also coevolve, transitioning from an inactivated state to an activated state. The elucidation and understanding of the interaction between cancer cells and CAFs will pave the way for new cancer therapies [1–3].
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Huang, Lei, e Walter Peissl. "Artificial Intelligence—A New Knowledge and Decision-Making Paradigm?" In Technology Assessment in a Globalized World, 175–201. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-10617-0_9.
Testo completoAbstract (sommario):
AbstractBased on a large scale of technology application scenarios, artificial intelligence (AI) is expected to have disruptive impact on economies and societies. In recent years, breakthroughs have been made in basic research on the fundamental technologies of artificial intelligence. AI is showing greater potential to become a general-purpose technology. Major economies are focusing on policies, regulations, and strategic plans around basic research and R&D of technology application scenarios in AI. However, the optimization of AI policy-making demands more interdisciplinary knowledge and a broader societal debate. In the domain of technology assessment (TA), the research on AI and its potential impacts has been considered important already early. The research questions, which include impacts on the workforce as well as impacts on societal communication and democracy as well as fundamental issues like responsibility, transparency, and ethics, have drawn widespread attention from TA studies. This chapter presents a scholarly discussion of AI topics in the context of TA, based on a qualitative analysis of AI policy databases from the OECD and EPTA. The analysis concludes that enhancing global cooperation in TA will contribute to address fundamental ethical and societal issues of AI, which in turn broadens the knowledge base and helps to pave way for a more inclusive and just use of AI.
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"DÉCOUVRIR : PAVAGES DE PLAN". In Les mathématiques du milkshake, 76–78. EDP Sciences, 2022. http://dx.doi.org/10.1051/978-2-7598-2759-6.c038.
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G, Patel Hiral, Pastagia Jayesh J, Senjaliya Tushar M e Chaudhary Lala S. "ROLE OF PLANT TRICHOMES IN PEST MANAGEMENT". In Futuristic Trends in Agriculture Engineering & Food Sciences Volume 3 Book 18, 85–100. Iterative International Publisher, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bcag18p4ch1.
Testo completoAbstract (sommario):
Natural hair like structures, produced on aerial surfaces of plants that involves in plant defence, are recognised as trichomes. These trichomes play their role in natural plant defence. These trichomes may be glandular or non-glandular, and secrete exudates, which trap insects and slowdown their movement and act as a physical barrier either against insect attack killing the insects directly or through retarding the insect growth and their population. These trichomes play an important role against both biotic and abiotic stresses. Plant trichomes, specialized epidermal outgrowths found on the surfaces of various plant species, have gained significant attention in recent years due to their diverse roles in plant development, defense, and pest management. Trichomes serve as a physical barrier against herbivores, play a crucial role in the release of chemical deterrents, and act as key components of indirect defense mechanisms. This review aims to provide a comprehensive overview of the multifaceted contributions of plant trichomes in pest management, focusing on their structural characteristics, chemical defense, and ecological interactions with herbivores. Understanding the mechanisms underlying the role of trichomes in pest management can potentially pave the way for the development of novel strategies for sustainable agriculture.
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Bhardwaj, Ragini, Jafar K. Lone e Sapna Langyan. "ROLE AND REGULATION OF PLANTS PHENOLICS IN HEAT STRESS TOLERANCE: AN OVERVIEW". In Futuristic Trends in Agriculture Engineering & Food Sciences Volume 3 Book 24, 226–38. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bcag24ch19.
Testo completoAbstract (sommario):
Plants are constantly challenged by a multitude of abiotic stresses, including extreme temperature fluctuations causing water scarcity. To adapt and survive, plants have evolved a complex array of defense mechanisms. Among these, plant phenolics, a diverse group of secondary metabolites synthesized via pathways like the shikimate/phenylpropanoid, play a crucial role. These compounds exhibit potent antioxidant and free radical scavenging abilities, acting as shields against various environmental stressors. Furthermore, plant phenolics showcase remarkable structural diversity, with specific functionalities tailored to individual plant species. Their contributions extend beyond mere stress mitigation, influencing crucial aspects of plant biology such as growth, development, and reproduction. They also demonstrate antimicrobial and anti-allergenic properties, acting as deterrents against pathogens. Additionally, they contribute to the vibrant colors and sensory attributes of fruits and vegetables. With the growing pressure of escalating food demands and the looming threat of climate change, enhancing crop resilience has become paramount. Delving deeper into the regulatory mechanisms and specific functions of plant phenolics offers immense potential. By elucidating their biosynthetic pathways, gene expression patterns, and diverse modes of action, we can empower crops to withstand the onslaught of abiotic stresses. This understanding can pave the way for the development of novel strategies to ensure global food security in the face of environmental challenges.
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Maurya, Rahul, Thirupataiah Boini, Lakshminarayana Misro, Thulasi Radhakrishnan e Rohit KS and Rajeesh VR. "INTRODUCTION OF VARIOUS ORGANIZED AND NONORGANIZED PARTS OF THE PLANTS USED IN CLINICAL APPLICATION". In Futuristic Trends in Herbal Medicines and Food Products, 1–12. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/nbennurch241.
Testo completoAbstract (sommario):
This chapter provides a comprehensive introduction to the diverse array of organized and non-organized plant parts employed in clinical applications. Plants have long been a source of therapeutic compounds, with their organized parts, such as leaves, stems, roots, and flowers, as well as nonorganized components like extracts and essential oils, exhibiting medicinal properties. The chapter explores the historical context of plant-based medicine, delves into the extraction methods for obtaining bioactive compounds, and highlights the pharmacological significance of different plant parts. Additionally, the paper discusses the relevance of traditional knowledge in the development of modern pharmaceuticals, emphasizing the importance of understanding the intricate relationship between plants and human health. Through this exploration, the aim is to enhance the appreciation of the rich botanical resources that contribute to the advancement of clinical applications and pave the way for future research and innovation in the field of plant-based medicine
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Yakin, Mr Josef, Mr Abdul Hadi Umam, Mr Atanu Sarma e Mr Mohidul Islam. "Plant Alkaloids: An Anti-diabetic Potential". In Pharmaceutical Science: Research and Innovation, 22–29. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/psrich4.
Testo completoAbstract (sommario):
The chronic metabolic disease known as diabetes mellitus, which is characterised by hyperglycemia, is a severe health burden that affects people all over the world. As a result of the limits and bad effects that relate to the treatments that are now available, the quest for new antidiabetic agents continues, despite the achievements that have been made in pharmacotherapy. It has come to people's notice that plant alkaloids have the potential to have medicinal benefits, including characteristics that may help prevent diabetes. The purpose of this study is to offer a complete overview of the possible anti-diabetic effects of plant alkaloids by investigating their mechanisms of action, preclinical and clinical data, and potential future applications. A comprehensive search of scientific databases led to the discovery of pertinent research that were published in journals that were subjected to peer review. Plant alkaloids, such as berberine, metformin, and quinolizidine alkaloids, have shown promise anti-diabetic benefits via a variety of mechanisms. These mechanisms include insulin sensitization, blockage of glucose absorption, and modification of signalling pathways that are important in glucose homeostasis. In addition, alkaloids have qualities that contribute to their overall therapeutic success in the treatment of diabetes. These features include antioxidant, anti-inflammatory, and lipid-lowering effects. To evaluate the effectiveness and safety of plant alkaloids as supplementary or alternative therapy for diabetes, more clinical studies are necessary, despite the positive preclinical evidence that has been collected. By gaining an understanding of the pharmacological characteristics and mechanisms of action of plant alkaloids, it is possible to pave the way for the creation of new antidiabetic medicines that are more effective and more tolerable.
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Shelake, Pramod S., Mousumi Sabat, Mounika E, Shweta F. Manik, Shilpa S. Selvan e Debabandya Mohapatra. "PLANT-BASED PROTEIN: A WAY FORWARD FOR NUTRITION SUSTAINABILITY". In Futuristic Trends in Agriculture Engineering & Food Sciences Volume 2 Book 9, 130–56. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2023. http://dx.doi.org/10.58532/v2bs9ch11.
Testo completoAbstract (sommario):
In recent years, plant-based proteins are gaining much more importance for various reasons. Traditionally, nuts and leguminous crops were considered natural sources of plant proteins. With the advancement of extraction technologies, proteins are derived from a wide range of cereals, vegetables, vegetable seeds, algae, and other edible seeds, which can be alternative protein sources. Besides, the antinutritional factors associated with legume crops are taken care of to provide a portion of sustainable and holistic food to the population. Furthermore, some traditional processes like fermentation are ways to minimize the health deterrent factors associated with plant-based proteins. Plant-based proteins are not confined to the milk and meat analogs anymore; they now constitute a part of the customized diet or designer foods for different age groups and professionals, in the form of protein concentrates, isolates and hydrolysates. The global market for plant-based protein has seen exponential growth post-COVID times, and several major players are in the research and development of plant-based protein. Considering that a large section of the global population is still striving for nutritional security, the availability of these plant-based proteins will pave the way for meeting healthy body and soul requirements in this dwindling climatic condition
Atti di convegni sul tema "Pavage du plan"
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Qian, Chen, Zhai Liang, Yin Yuhao e Tao Yunliang. "An Improved Algorithm for Potential Accident Consequence Assessment at NPPs Based on PAVAN". In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-67262.
Testo completoAbstract (sommario):
PAVAN is an atmospheric dispersion program for evaluating design basis accidental releases of radioactive materials from nuclear power plant. It was developed by Pacific Northwest Laboratory on the basic of the atmospheric dispersion models described in RG 1.145 by NRC (U.S. Nuclear Regulatory Commission). Using the joint frequency of wind direction, wind speed and atmospheric stability, the atmospheric relative concentration values for the exclusion area boundary and outer LPZ boundary of nuclear power plant are calculated and given by the program. Once the program was introduced, it has been widely used in the radioactive accident consequence assessment, especially in the FSAR (Final Safety Analysis Report) and Report of EIA (Environmental Impact Assessment) of NPPs in China. The theory basis and general method of PAVAN is introduced in this paper. And specialty of the X/Q points based on joint frequency data is discussed. The envelope algorithm of PAVAN is also introduced and discussed. The paper presents an improved algorithm based on PAVAN which uses the hourly meteorological data as input instead of joint frequency data. In this algorithm, the size of X/Q points is related to the quantity of the hourly meteorological data. When the quantity is large enough, e.g. 17520 sets of hourly meteorological data in two years, the envelope curve for X/Q points fit more exactly than PAVAN. Using the observed meteorological data, the improved algorithm is compared with PAVAN. The result proves that the former is more accurate. In general, the improved algorithm is relatively conservative. In some situation, the conservativeness is not certain. The factors which result in the uncertainty are deeply discussed. Further optimized are performed by the algorithm. The number of points to seek in envelope curve fitting is set to be dynamic and be a quarter of total number of X/Q points to be fitted. The result shows that increasing the number of points to seek in the iteration process of envelope curve fitting will lead to more conservative X/Q values. Additionally, the optimized algorithm provides X/Q value of 50% probability level for overall site. The value is not relatively conservative. From the standpoint of statistical probability, it is more realistic and is acceptable for potential accident consequence assessment. Especially, when X/Q value of 95% probability level for overall site is too conservative to accept, the value of 50% probability level can be used to replace the conservative value.
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Torrese, Patrizio, Giorgio Pilla, Marica Bersan, Mario Luigi Rainone e Gianfranco Ciancetti. "Mapping the Uprising of Highly Mineralized Waters Occurring along a Fault Zone in the “Oltrepò Pavese” Plain Upper Aquifers (Northern Italy) Using VLF‐EM Survey". In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2009. Environment and Engineering Geophysical Society, 2009. http://dx.doi.org/10.4133/1.3176764.
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Torrese, P., G. Pilla, M. Bersan, M. L. Rainone e G. Ciancetti. "Mapping the uprising of highly mineralized waters occurring along a fault zone in the Oltrepò Pavese plain upper aquifers (Northern Italy) using VLF-EM survey". In 22nd EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2009. http://dx.doi.org/10.3997/2214-4609-pdb.157.sageep082.
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Vishnumolakala, Narendra, Vivek Kesireddy, Sheelabhadra Dey, Eduardo Gildin e Enrique Z. Losoya. "Optimizing Well Trajectory Navigation and Advanced Geo-Steering Using Deep-Reinforcement Learning". In SPE Annual Technical Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/215011-ms.
Testo completoAbstract (sommario):
Abstract The efficiency of modern drilling operations depends on the planning phase to determine possible well trajectories and the ability of the directional driller to traverse them accurately. Deviations from the planned trajectory while drilling often require updates to the original well plan, involving drilling engineers and rig personnel, which can be time-consuming due to several uncertainties, such as formation tendencies, survey measurement inaccuracy, or estimation errors. To address these challenges, this paper proposes an innovative solution that leverages artificial intelligence (AI) methods, specifically deep reinforcement learning (DRL) to dramatically reduce the need for continuous corrections to the well plan while drilling. In the DRL paradigm, the proposed approach eliminates the need for constant plan adjustments by training a drilling agent to imitate the driller's ability to dynamically adjust the well trajectory in real time based on information from previous drilling logs, well plans, and near-the-bit measurements. This research utilizes a physics-based simulation engine to model a directional drilling environment as a Markov Decision Process (MDP). The MDP is intended for an autonomous system based on geological data models and real-time measurements obtained while drilling (MWD) to train deep reinforcement learning (DRL) agents to drill directional wellbores that maintain maximum contact with the target formation. The simulator incorporates uncertainties of the real-world drilling environment, such as bit walk, formation properties, and drilling speed which, combined, help derive the actions performed by the drilling agent. Our findings reveal that using the proposed methodology in a virtual drilling environment, the drilling agent effectively navigates well paths in the presence of uncertainties and successfully tackle challenges such as avoiding excessive tortuosity and doglegs while maximizing contact with the target formation. Furthermore, the use of domain randomization during training enabled the RL agents to exhibit exceptional generalizability to a wide range of drilling scenarios through the random selection of drilling test sites from a set of unseen sites during training — demonstrating the ability of the agent to adapt and reach the target formation even when the initial well-plan is inaccurate — resulting in a 90% success rate. This self-correcting approach demonstrates the potential for automated, proactive, self-contained steering operations with minimal human involvement. The developed simulation framework is a pioneering approach to enhancing real-time adjustments of drilling well paths using reinforcement learning and optimizing drilling operations. It is the first-of-its-kind method to augment drillers’ ability to navigate through drilling uncertainties and maximize pay zone contact and pave the way for the creation of robust, scalable, and practical autonomous drilling systems.
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Volkov, Valentyn S. "Anisotropic Photonics with Single-Crystal Halide Perovskites". In Novel Optical Materials and Applications. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/noma.2023.noth3c.7.
Testo completoAbstract (sommario):
In spite of recent advances in the field, the achievement of continuous tunability of optical anisotropy remains an outstanding challenge. Here, we present a solution to the problem through the chemical alteration of halogen atoms in single-crystal halide perovskites. Our results reveal that this anisotropy could be in-plane and out-of-plane depending on perovskite shape - rectangular and square. As a practical demonstration, we have created perovskite anisotropic nanowaveguides and shown a significant impact of anisotropy on high-order guiding modes. These findings pave the way for halide perovskites as a next-generation platform for tunable anisotropic photonics.
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Jacques, Laurence, e Mickael Bartier. "A world first funded by the European Union: adaptation and startup of an U.K. hexane extraction plant to run on a 100% biobased solvent." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/ysqq7260.
Testo completoAbstract (sommario):
The 2-methyloxolane is a 100% biobased solvent produced and sold by Pennakem under the name EcoXtract®. It is a low carbon footprint, low toxicity, lipophilic liquid which has been used for more than 15 years in the pharma industry and which is currently under review for food use in Europe and in the US. In 2021, Pennakem Europa, together with 4 european partners and a financial support from the European Union, adapted a 10 Tons/day Crown plant located in U.K., New Holland Extraction, to the 2-methyloxolane. The plant successfully started on a soy campaign in October 2021 and produced oil with less 1 ppm solvent and a well defatted meal (< 1%). The presentation will describe the main plant modifications and the results of the campaign. New Holland Extraction is now able to run with hexane or with the 2-methyloxolane to support the process optimization and pave the path to the conversion of larger plants.
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Mani, Mahesh, Kevin W. Lyons, Sudarsan Rachuri, Eswaran Subrahmanian, Gaurav Ameta, Ram D. Sriram e Shaw C. Feng. "Introducing Sustainability Early Into Manufacturing Process Planning". In ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME/ASME International Conference on Materials and Processing. ASMEDC, 2008. http://dx.doi.org/10.1115/msec_icmp2008-72129.
Testo completoAbstract (sommario):
In response to the global trend towards implementing sustainable manufacturing practices, we put forth an exploratory approach that uses energy monitoring as a means to introduce sustainability criteria early into manufacturing process planning. Typically cost, quality and time are the indices for manufacturability assessment in generating manufacturing process plans. In this paper, we propose the idea of introducing sustainability to complement cost, quality and time to arrive at alternative sustainable plans in identified manufacturing processes. To be sustainable, it is pertinent that manufacturing firms understand the energy consumption of different manufacturing equipment used to produce products. This will enable industry to implement energy reduction processes in a more effective manner and pave the way for improved and alternate manufacturing solutions. The paper presents the potential utility of energy usage readings in the interest of continuing dialogue and collaboration.
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Muraro, Vinicius, e Devrim Göktepe-Hultén. "Assessment of academic work in AI using Bibliometrics: The Case of Lund University". In 27th International Conference on Science, Technology and Innovation Indicators (STI 2023). International Conference on Science, Technology and Innovation Indicators, 2023. http://dx.doi.org/10.55835/6442a2612e5bbccb9a78fe1e.
Testo completoAbstract (sommario):
Artificial Intelligence (AI) is considered as “General Purpose Technology” that could have large impact effects in several sectors and cause disruptive changes in societies. Universities are often seen as the seedbeds of new knowledge and scientific research, as a point of departure, by using bibliometric approach we aim to assess the scientific output for AI, to understand the characteristics and potential of AI research at Lund University. The preliminary findings showed the diverse partnerships of LU scientists with other universities, companies, research institutes, and hospitals, funding agencies, and international partnerships. Our study aims to establish the groundwork for future assessments of AI research in a sustainable and transparent manner. We plan to identify both traditional scientific inputs and outputs, to unpack the unknown dimensions of academic work at universities, with a more holistic approach to assess academic work and pave the way for future studies.
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Sampaio, R. F. V. "On the utilization of radial extrusion to characterize fracture forming limits. Part I – methodology and tooling". In Sheet Metal 2023. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902417-29.
Testo completoAbstract (sommario):
Abstract. This paper and its second part introduce a new formability test based on double-action radial extrusion to characterize material formability in the bulk-to-sheet material flow transitions that are commonly found in metal forming. This first part draws from the presentation of a multidirectional tool, which was designed to convert the vertical press stroke into horizontal movement of the extrusion punches towards each other, to aspects of experimental strain determination, fractography and finite element analysis. The methodology and tooling that are introduced here pave the way for subsequent testing and modelling of the different modes of fracture in three-dimensional to plane-stress evolutions, typical of bulk-to-sheet material flow transitions, by means of the new proposed test.
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Perna, Valerio. "Playful Design Strategies. The Introbots Experience: Enhancing Co-Design Practices for Inclusive and Engaging Urban Spaces with Children." In International Conference of Tirana Planning Week. POLIS University Press, 2024. http://dx.doi.org/10.37199/c41000701.
Testo completoAbstract (sommario):
Western Culture has stigmatized introversion as a less desirable trait of personality especially for designers and people involved in creative activities. According to many studies, an extroverted character is considered a plus and leads to a more successful and satisfying life. But is true that introverts are at a disadvantage? The Introbots are a group of fluffy and goofy playful artefacts that aim to create an exploration and a commentary of what it means to be introverted and to pave the way for educators and students to reflect on the misconception that extroversion is positive and introversion is a disadvantage to be corrected. In 2018, they were the protagonists of a workshop at the School of Architecture (SOU) in Favara children, when they were used to sensibilize the young students to the topic of introversion and to empower them to design more inclusive playground and urban spaces in the urban environments. The chapter discusses the results of that experience and implicitly shows how the relationship between play and learning is not unilateral but rather biunivocal, and the playful artefacts are not just mere instruments but real tools that can help us to disclose the power of play when it comes to the design of our urban landscapes.
Rapporti di organizzazioni sul tema "Pavage du plan"
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MRC Annual Report 2021 Part 1. Vientiane, Lao PDR: Mekong River Commission Secretariat, marzo 2022. http://dx.doi.org/10.52107/mrc.b9hgs0.
Testo completoAbstract (sommario):
The Annual Report describes the success stories of the key achievements and progress of the Mekong River Commission during 2021 as the first year of implementation of the MRC Strategic Plan (MRC SP) 2021-2025, which is integrated with the Basin Development Strategy (BDS) 2021-2030. Despite having a difficult year in 2021 during the pandemic, some major preparatory work has been completed to pave the way for the implementation of the Strategic Plan 2021-2025. The five Strategic Priorities are identified to direct the realization of 11 BDS Outcomes and 30 Outputs by 2030. The MRC SP 2021-2025 is also based on these five strategic priorities or dimensions, namely Environment, Social, Economic, Climate Change, and Cooperation Dimensions. Each dimension reflects each SP with its equal importance to deliver BDS Outcomes and Outputs. A total of 95 routine and non-routine activities are deemed necessary to achieve these Outputs.
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CEMEX: Empowerment through Investment. Inter-American Development Bank, gennaio 2010. http://dx.doi.org/10.18235/0006254.
Testo completoAbstract (sommario):
Throughout Latin America low-income neighborhoods have difficulty in paving city streets. Municipalities are typically short of funds, and many informal urban settlements have not yet been properly incorporated into the tax base.An innovative solution has been devised by CEMEX, a multinational cement company based in Mexico, to mobilize both public and private resources to pave streets in low-income neighborhoods. Under the plan, called Mejora tu Calle, city residents will receive individual microloans and then pool the resources to finance half the cost of street pavement for their neighborhood. Municipalities will contribute the other half of the cost.