Academic literature on the topic 'Interface raide'
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Journal articles on the topic "Interface raide"
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Ribeiro, Micaela, Olga Sousa Carneiro, and Alexandre Ferreira da Silva. "Interface geometries in 3D multi-material prints by fused filament fabrication." Rapid Prototyping Journal 25, no. 1 (January 7, 2019): 38–46. http://dx.doi.org/10.1108/rpj-05-2017-0107.
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Purpose An issue when printing multi-material objects is understanding how different materials will perform together, especially because interfaces between them are always created. This paper aims to address this interface from a mechanical perspective and evaluates how it should be designed for a better mechanical performance. Design/methodology/approach Different interface mechanisms were considered, namely, microscopic interfaces that are based on chemical bonding and were represented with a U-shape interface; a macroscopic interface characterized by a mechanical interlocking mechanism, represented by a T-shape interface; and a mesoscopic interface that sits between other interface systems and that was represented by a dovetail shape geometry. All these different interfaces were tested in two different material sets, namely, poly (lactic acid)–poly (lactic acid) and poly (lactic acid)–thermoplastic polyurethane material pairs. These two sets represent high- and low-compatibility materials sets, respectively. Findings The results showed, despite the materials’ compatibility level, multi-material objects will have a better mechanical performance through a macroscopic interface, as it is based on a mechanical interlocking system, of which performance cannot be achieved by a simple face-to-face interface even when considering the same material. Originality/value The paper investigates the importance of interface design in multi-material 3D prints by fused filament fabrication. Especially, for parts intended to be subjected to mechanical efforts, simple face-to-face interfaces are not sufficient and more robust and macroscopic-based interface geometries (based on mechanical interlocking systems) are advised. Moreover, such interfaces do not raise esthetic problems because of their working principle; the 3D printing technology can hide the interface geometries, if required.
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de Gier, Jan, Bernard Nienhuis, Paul A. Pearce, and Vladimir Rittenberg. "The Raise and Peel Model of a Fluctuating Interface." Journal of Statistical Physics 114, no. 1/2 (January 2004): 1–35. http://dx.doi.org/10.1023/b:joss.0000003102.81727.fd.
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Sicart, Miguel. "Reality has always been augmented: Play and the promises of Pokémon GO." Mobile Media & Communication 5, no. 1 (November 28, 2016): 30–33. http://dx.doi.org/10.1177/2050157916677863.
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This piece provides an explanation to the early success of Pokémon GO. It proposes an argument about how this game exemplifies a computational culture of play. By drawing on philosophy of technology (Floridi, 2013) and game design research (Montola, Stenros, & Waern, 2009), this article argues that the success of Pokémon GO is the result of the development of a play experience and a computational interface for a reality that is already augmented. These interfaces open new possibilities for digital play in public, but they also raise concerns regarding corporate appropriation of public spaces.
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Strickfaden, Shelly C., and Peter M. Pryciak. "Distinct Roles for Two Gα–Gβ Interfaces in Cell Polarity Control by a Yeast Heterotrimeric G Protein." Molecular Biology of the Cell 19, no. 1 (January 2008): 181–97. http://dx.doi.org/10.1091/mbc.e07-04-0385.
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Saccharomyces cerevisiae mating pheromones trigger dissociation of a heterotrimeric G protein (Gαβγ) into Gα-guanosine triphosphate (GTP) and Gβγ. The Gβγ dimer regulates both mitogen-activated protein (MAP) kinase cascade signaling and cell polarization. Here, by independently activating the MAP kinase pathway, we studied the polarity role of Gβγ in isolation from its signaling role. MAP kinase signaling alone could induce cell asymmetry but not directional growth. Surprisingly, active Gβγ, either alone or with Gα-GTP, could not organize a persistent polarization axis. Instead, following pheromone gradients (chemotropism) or directional growth without pheromone gradients (de novo polarization) required an intact receptor–Gαβγ module and GTP hydrolysis by Gα. Our results indicate that chemoattractant-induced cell polarization requires continuous receptor–Gαβγ communication but not modulation of MAP kinase signaling. To explore regulation of Gβγ by Gα, we mutated Gβ residues in two structurally distinct Gα–Gβ binding interfaces. Polarity control was disrupted only by mutations in the N-terminal interface, and not the Switch interface. Incorporation of these mutations into a Gβ–Gα fusion protein, which enforces subunit proximity, revealed that Switch interface dissociation regulates signaling, whereas the N-terminal interface may govern receptor–Gαβγ coupling. These findings raise the possibility that the Gαβγ heterotrimer can function in a partially dissociated state, tethered by the N-terminal interface.
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Xie, Sheng-Xue, Kyle Boone, Sarah Kay VanOosten, Esra Yuca, Linyong Song, Xueping Ge, Qiang Ye, Paulette Spencer, and Candan Tamerler. "Peptide Mediated Antimicrobial Dental Adhesive System." Applied Sciences 9, no. 3 (February 8, 2019): 557. http://dx.doi.org/10.3390/app9030557.
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The most common cause for dental composite failures is secondary caries due to invasive bacterial colonization of the adhesive/dentin (a/d) interface. Innate material weakness often lead to an insufficient seal between the adhesive and dentin. Consequently, bacterial by-products invade the porous a/d interface leading to material degradation and dental caries. Current approaches to achieve antibacterial properties in these materials continue to raise concerns regarding hypersensitivity and antibiotic resistance. Herein, we have developed a multi-faceted, bio-functionalized approach to overcome the vulnerability of such interfaces. An antimicrobial adhesive formulation was designed using a combination of antimicrobial peptide and a ε-polylysine resin system. Effector molecules boasting innate immunity are brought together with a biopolymer offering a two-fold biomimetic design approach. The selection of ε-polylysine was inspired due to its non-toxic nature and common use as food preservative. Biomolecular characterization and functional activity of our engineered dental adhesive formulation were assessed and the combinatorial formulation demonstrated significant antimicrobial activity against Streptococcus mutans. Our antimicrobial peptide-hydrophilic adhesive hybrid system design offers advanced, biofunctional properties at the critical a/d interface.
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Silva, Thiago Rocha, Jean-Luc Hak, and Marco Winckler. "A Formal Ontology for Describing Interactive Behaviors and Supporting Automated Testing on User Interfaces." International Journal of Semantic Computing 11, no. 04 (December 2017): 513–39. http://dx.doi.org/10.1142/s1793351x17400219.
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Nowadays many software development frameworks implement Behavior-Driven Development (BDD) as a mean of automating the test of interactive systems under construction. Automated testing helps to simulate user’s actions on the User Interface and therefore check if the system behaves properly and in accordance to scenarios that describe functional requirements. However, tools supporting BDD run tests on implemented User Interfaces and are a suitable alternative for assessing functional requirements in later phases of the development process. However, even when BDD tests can be written in early phases of the development process they can hardly be used with specifications of User Interfaces such as prototypes. To address this problem, this paper proposes to raise the abstraction level of both system interactive behaviors and User Interfaces by means of a formal ontology that is aimed at supporting test automation using BDD. The paper presents an ontology and an ontology-based approach for automating the test of functional requirements of interactive systems. We demonstrate the feasibility of this ontology-based approach to assess functional requirements in prototypes and full-fledge applications through an illustrative case study of e-commerce applications for buying flight tickets.
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Heald, S. M., and E. V. Barrera. "Glancing angle x-ray study of the effect of oxygen on interface reactions in Al/Ni bilayers." Journal of Materials Research 6, no. 5 (May 1991): 935–42. http://dx.doi.org/10.1557/jmr.1991.0935.
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Glancing angle x-ray reflectivity and EXAFS measurements have been made on a series of UHV prepared Al/Ni bilayers with varying amounts of oxygen impurities. These samples show an intrinsic reacted region prior to annealing, and for clean samples further reaction occurs at 250 °C. Oxygen is found to influence strongly the course of the reaction with an effect which depends on its location. A few percent O impurity within the Al film strongly suppresses the grain boundary diffusion path, which allows the growth of a smooth NiAl3 layer. Interfacial O exposures of 60 and 600 Langmuir both inhibit the initial reaction and raise the temperature at which further reaction occurs to as much as 300 °C with an effect which depends on exposure. The thickness of the intrinsic reaction zone is about 60 Å for clean samples, and is nearly eliminated for contaminated interfaces. The results indicate that surface/interface, grain boundary, and bulk diffusion all play important roles in the formation of these interfaces, and that each of these is influenced by O impurities.
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MAYER, GUSZTÁV, GÁBOR HÁZI, JÓZSEF PÁLES, ATTILA R. IMRE, BJÖRN FISCHER, and THOMAS KRASKA. "ON THE SYSTEM SIZE OF LATTICE BOLTZMANN SIMULATIONS." International Journal of Modern Physics C 15, no. 08 (October 2004): 1049–60. http://dx.doi.org/10.1142/s0129183104006492.
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In lattice Boltzmann simulations particle groups — represented by scalar velocity distributions — are moved on a finite lattice. The size of these particle groups is not well-defined although it is crucial to assume that they should be big enough for using a continuous distribution. Here we propose to use the liquid–vapor interface as an internal yardstick to scale the system. Comparison with existing experimental data and with molecular dynamics simulation of Lennard–Jones-argon shows that the number of atoms located on one lattice site is in the order of few atoms. This contradicts the initial assumption concerning the number of particles in the group, therefore seems to raise some doubts about the applicability of the lattice Boltzmann method in certain problems whenever interfaces play important role and ergodicity does not hold.
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Hendery, Rachel, and Andrew Burrell. "Playful interfaces to the archive and the embodied experience of data." Journal of Documentation 76, no. 2 (December 23, 2019): 484–501. http://dx.doi.org/10.1108/jd-05-2019-0078.
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Purpose The purpose of this paper is to demonstrate the possibility for the galleries, libraries, archives and museums sector to employ playful, immersive discovery interfaces for their collections and raise awareness of some of the considerations that go into the decision to use such technology and the creation of the interfaces. Design/methodology/approach This is a case study approach using the methodology of research through design. The paper introduces two examples of immersive interfaces to archival data created by the authors, using these as a springboard for discussing the different kinds of embodied experiences that users have with different kinds of immersion, for example, the exploration of the archive on a flat screen, a data “cave” or arena, or virtual reality. Findings The role of such interfaces in communicating with the audience of an archive is considered, for example, in allowing users to detect structure in data, particularly in understanding the role of geographic or other spatial elements in a collection, and in shifting the locus of knowledge production from individual to community. It is argued that these different experiences draw on different metaphors in terms of users’ prior experience with more well-known technologies, for example, “a performance” vs “a tool” vs “a background to a conversation”. Originality/value The two example interfaces discussed here are original creations by the authors of this paper. They are the first uses of mixed reality for interfacing with the archives in question. One is the first mixed reality interface to an audio archive. The discussion has implications for the future of interfaces to galleries, archives, libraries and museums more generally.
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Heil, Oliver P., and Arien W. Langvardt. "The Interface between Competitive Market Signaling and Antitrust Law." Journal of Marketing 58, no. 3 (July 1994): 81–96. http://dx.doi.org/10.1177/002224299405800306.
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The authors examine the antitrust implications of certain market behavior, using recent findings from research on competitive market signaling. They show that certain behavior of a firm that is sometimes thought to raise antitrust concerns should be viewed as a natural and permissible facet of competitive interplay in the market. Conversely, they identify other market behavior that should be viewed with much more caution due to the antitrust risks of such behavior. The authors offer new perspectives on the motives and intentions that drive market behavior but may or may not raise antitrust concerns. They also show how competitive signaling research holds considerable promise for a better understanding of when serious antitrust issues are or are not triggered by particular market actions.
Dissertations / Theses on the topic "Interface raide"
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Zou, Ziqiang. "A sharp interface method for low Mach two-phase flows with phase change Toward asymptotic-preserving low-Mach correction for sharp interface two-phase flows with capillary effects An Accurate Sharp Interface Method for Two-Phase Compressible Flows at Low-Mach Regime." Thesis, université Paris-Saclay, 2020. https://tel.archives-ouvertes.fr/tel-03178310.
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Une approche d'interface raide est présentée pour le calcul des écoulements diphasiques avec tension superficielle et changement de phase en régime à faible nombre de Mach. Pour développer un tel modèle, où de légers effets compressibles sont pris en compte ainsi que des fermetures thermodynamiques correctes, le liquide et le gaz sont considérés comme compressibles et décrits par un solveur compressible précis. Ce solveur compressible adopte une technique de décomposition appelée "décomposition du transport acoustique" qui décompose le système Euler en deux parties: acoustique et transport. Sur la base du sous-système acoustique, un solveur de Riemann approximatif qui tient compte des effets de tension superficielle et de changement de phase est développé. L'interface de l'écoulement diphasique est capturée par la méthode de Level Set et considérée comme raide. La problème de la capture d'interface de la méthode Level Set dans le cadre Eulérien est le point clé des simulations d'écoulement diphasique, et dans ce travail, nous proposons et adoptons des approches d'ordre élevé pour l'advection de l'interface, la redistanciation et l'estimation de la courbure. En régime à faible nombre de Mach, les solveurs compressibles conventionnels perdent en précision et une correction à faible Mach est alors nécessaire pour réduire la dissipation numérique. Pour une méthode d'interface raide, l'interface est traitée comme la discontinuité de contact via la méthode Ghost Fluid. Sans une région lisse à l'interface, une telle discontinuité existant à l'interface présente un énorme défi pour la conception d'un schéma numérique. La correction à faible Mach bien connue dans la littérature pourrait conduire à une erreur de troncature significative, en particulier pour les écoulements diphasiques avec de grands rapports de densité et de vitesse du son. Pour retrouver une bonne propriété de préservation asymptotique, nous proposons une nouvelle correction à faible Mach avec une analyse asymptotique rigoureuse. Plusieurs cas de test numériques ont été utilisés pour valider la présente approche numérique et montrer ses bonnes performancesA sharp interface approach is presented for computing two-phase flows with surface tension and phase change in low Mach regime. To develop such a model, where slight compressible effects are taken into account as well as correct thermodynamical closures, both the liquid and the gas are considered compressible and described by a precise compressible solver. This compressible solver adopt a splitting technique called "acoustic-transport splitting" which splits the Euler system into two parts: acoustic and transport. Based on the acoustic subsystem, an approximate Riemann solver that accounts for surface tension and phase change effects is developed. The interface between two-phase flows is captured by the Level Set method that is considered to be sharp. The interface capturing issue of the Level Set method within the Eulerian framework is the key point of the two-phase flow simulations, and in this work we propose and adopt high-order approaches for interface advection, redistancing and curvature estimation. In low Mach regime, conventional compressible solvers lose accuracy and a low Mach correction is then necessary to reduce the numerical dissipation. For a sharp interface method, the interface is treated as the shock-wave contact discontinuity via the Ghost Fluid method. Without a smooth region at the interface, such discontinuity existing at the interface presents a huge challenge to the design of a numerical scheme. The well-known low Mach fix in literature could lead to significant truncation error, especially for two-phase flows with large density and sound speed ratios. To recover a good asymptotic-preserving property, we propose a new low Mach correction with rigorous asymptotic analysis. Several numerical test cases have been employed to validate the present numerical approach and enlighten its good performance
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Gérard, Valentin. "Technique d'intrusiométrie rapide pour l'étude du mouillage dynamique et du transport de soluté dans des pores hydrophobes nanométriques." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALY040.
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Forcer l'intrusion d'un liquide dans une matrice nanoporeuse non-mouillante requiert de porter le liquide à des pressions élevées de l'ordre de quelques dizaines de mégapascals. Quand l'imbibition forcée du liquide dans le volume poreux à haute pression est réversible, l'ensemble poreux/liquide, alors qualifié de système hétérogène lyophobe (SHL), peut-être mis en oeuvre comme convertisseur d'énergie mécanique en énergie interfaciale avec des densités de puissance avantageuses par rapports aux solutions techniques actuelles (supercapacités, accumulateurs hydrauliques). La compréhension physique des SHL en régime dynamique est donc déterminante pour les applications potentielles. Afin d'étudier les processus de remplissage et vidange à l'oeuvre dans les SHL, un dispositif appelé intrusiomètre dynamique a été amélioré et qualifié afin de pouvoir sonder ces processus sur trois décades de temps, pour des températures allant de -5° à 70° et jusqu'à une pression de 100MPa. Deux matrices poreuses sont employées. Le premier matériau est un hydride organo-silicique à porosité ordonnée indépendante qui a été synthétisé puis rendu hydrophobe par fonctionnalisation. Les mesures dynamiques conduites sur ce solide rendent compte de la structuration microscopique de sa surface poreuse par le biais d'un modèle d'ancrage/relaxation de la ligne triple lors de l'intrusion du liquide, et de la pertinence de la nucléation d'une bulle de vapeur comme processus limitant l'extrusion. Le second matériau, le ZIF-8, qui présente des pores sub-nanométriques, a été employé pour explorer des phénomènes dissipatifs présents lors de mesures dynamiques.Par ailleurs, l'étude du transport de soluté vers le coeur du poreux est explorée. Un dispositif original a été conçu afin de pouvoir changer le liquide en conservant le poreux. Des mesures cycliques en solutions salines étendent ainsi la compréhension du rôle du soluté vis-à-vis du poreux. En particulier, la diffusion lente du soluté dans le volume poreux après intrusion est établie et une hypothèse de cristallisation des ions dans la nanoporosité est proposée afin d'interpréter les mesures obtenuesTens of megapascals of hydrostatic pressure are requiered in order to force the intrusion of a liquid into a non-wetting nanoporous matrix. When the reversibility of this forced imbibition exists, the pair porous matrix/liquid is called a lyophobic heterogeneous system. Those systems may be used to convert mechanical energy into interfacial one with power densities attractive compared to other conversion devices. The fundamental description of LHS in the dynamical regime is thus of prime interest considering applications. A dynamical intrusiometer as been upgraded in order to study the filling and drying of the nanoporous matrices over three orders of magnitude in time and over the temperature range -5° to 70° up to 100MPa. Two porous matrices have been studied. The first one is a periodic mesoporous organosilica which has been synthetised and grafted so as to render it non-wetting. The microscopic order of the porous surface is related thanks to a pinning/depinning model for the contact line motion during the intrusion, while the nucleation of a vapor bubble is shown to be still relevant to describe the extrusion. A more thorough investigation for dissipative phenomena is conducted in the sub-nanometer porous matrix ZIF-8. Solute transport in this material is also presented. To this end, a new device has been designed to allow the renewal of the liquid while keeping the powder. Cyclic measures could then broaden the understanding of the influence of the solute on the matrix. The main conclusions being a slow diffusion of ions in the grains and a crystallisation of the solute when drying occurs
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Raimonet, Mélanie. "Cycle benthique du silicium dans les estuaires : observations et modélisation à différentes échelles spatio-temporelles." Brest, 2011. http://www.theses.fr/2011BRES2063.
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Les estuaires sont des zones complexes et hétérogènes, soumises à de fortes pressions anthropiques, qui peuvent avoir un rôle déterminant de filtre lors du transport et de la transformation de la matière vers les zones côtières. Le cycle du silicium (Si), essentiel à la croissance des diatomées qui constituent la base des réseaux trophiques sains, est encore mal défini au sein de ces interfaces. Cette thèse a pour objectif d’étudier le cycle benthique du Si dans les deux principaux estuaires de la Rade de Brest. Afin d’aborder les interactions d’échelles propres aux estuaires, et de les intégrer aux estimations de flux, les hétérogénéités spatiales et les variations tidales du cycle benthique du Si ont été quantifiées et comparées aux variations saisonnières le long des estuaires. Dans le but d’étudier les interactions entre les cycles de la matière (N, P, C, Si) exerçant un contrôle sur le fonctionnement des écosystèmes côtiers, les interactions entre Si et Pont été explorées et semblent favoriser la rétention de P. Enfin, le cycle benthique du Si a été étudié à l’aide d’u outil de modélisation de la diagénèse précoce, afin de palier à la difficile estimation directe des flux de dépôt dans les estuaires, et évaluer le rôle des estuaires dans la rétention et le recyclage de Si. Cette première contribution à l’étude du fonctionnement du cycle du Si dans les estuaires de la Rade de Brest ouvre de nombreuses perspectives en termes d’études de processus et de modélisation, que ce soit dans la perspective d’un modèle intégré du continuum terre-mer de la Rade de Brest, ou d’un modèle générique du cycle du Si ai sein des marges continentalesEstuaries are complex and heterogeneous areas, subject to many anthropogenic activities, which can have strong filtering capacities during transport and processing of terrestrial matter to coastal zones. The cycling of silicon (Si), which is essential for the growth of diatoms constituting the basis of healthy food webs, is coarsely defined at these interfaces (Dürr et al. , 2011). This thesis aims to study the benthic Si cycle in the two main estuaries of the Bay of Brest. To address the interactions of scales and to integrate them in flux estimates spatial heterogeneity and tidal variations of benthic Si cycle were quantified and compared with seasonal variations along estuaries. In order to study the interactions between the different cycles of matter (N, P, C, Si) controlling the functioning of coastal ecosystems, the interactions between Si and P have been explored and appear to favor the retention of P. Finally, the benthic cycle of Si was studied using a diagenetic model to estimate deposition fluxes, that are difficult to estimate directly in estuaries, and to evaluate the retention and recycling of Si at a seasonal scale. This first contribution to the study of the Si cycle in the estuaries of the Bay of Brest offers many opportunities in terms of experimental studies and modelling, whether from the perspective of an integrative model of the land-sea interface in the Bay of Brest, or from the implementation of a generic model of the Si cycle in continental margins
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Yahia, Messaoud Abdellatif. "Etude et faisabilité de couches de silice ultra-minces par procédé thermique rapide." Toulouse, INSA, 1991. http://www.theses.fr/1991ISAT0029.
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Dans ce memoire, les cinetiques d'oxydation par procede thermique rapide (rto) ont ete etudiees dans la gamme de temperatures 1060-1240c. Un effort particulier a ete consenti pour l'etude des parametres technologiques (nettoyage, cycle d'oxydation, mesure de la temperature. . . ) intervenant avant, pendant et apres l'oxydation pour d'une part bien nettoyer le substrat, optimiser et homogeneiser le chauffage et d'autre part mieux caracteriser les couches de silice ainsi realisees (ellipsometrie, profilometrie, met). La comparaison des resultats experimentaux obtenus dans cette gamme de temperatures avec le modele semi-empirique de c. J. Han et c. R. Helms a donne un bon accord. En outre, aucun phenomene specifique a la technique rto n'a ete constate. Des mesures electriques (capacite-tension, courant-tension, polarisation a courant constant) effectuees sur des diodes metal-isolant-semiconducteur (epaisseur d'isolant: 80-100 a), realisees par rto ont donne des champs de claquage de l'ordre de 15 mv/cm, des densites d'etat d'interface de 3. 10#1#1 ev##1. Cm##2 et des charges au claquage egal a 40 c. Cm##2 (j=1a/cm#2). Ces resultats figurent parmi les meilleurs de la litterature et confirment que les procedes thermiques rapides sont une voie tres prometteuse pour la technologie submicronique
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Lee, Min-I. "Atomic structure, electronic states and relaxation dynamics in photovoltaic materials and interfaces from photoemission-related spectroscopies." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS220/document.
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L'efficacité du processus photovoltaïque dépend du matériau actif à travers la structure de bande et la dynamique des porteurs de charge. Dans cette thèse, nous avons relié les propriétés électroniques et la dynamique de relaxation à la structure atomique des matériaux utilisés pour deux technologies différentes de cellules solaires, celle à base d’hétérostructures de silicium, et celle à base de pérovskites hybrides organiques-inorganiques. Dans les cellules solaires de silicium, nous avons analysé l'influence des défauts sur les propriétés électroniques des hétérostructures de silicium amorphe (a-Si:H/a-SIC:H/c-Si) par spectroscopies des niveaux de coeur et de la bande de valence. En particulier, nous avons quantifié le nombre de liaisons pendantes induites dans la couche a-Si:H par irradiation, et nous avons identifié les états électroniques qui leur sont associés. Enfin nous avons expliqué les transitions précédemment observées par photoluminescence. Dans les cellules solaires à pérovskite hybride, nous avons corrélé la structure atomique, la structure électronique et la dynamique électronique pour des pérovskites bi- et tridimensionnelles. Dans ce but nous avons utilisé tout un panel de techniques complémentaires: diffraction des rayons X, spectroscopie de photoémission résolue en angle, spectroscopie de photoémission inverse et photoémission à deux photons résolue en temps. Pour la pérovskite bidimensionnelle (C₆H₅C₂H₄NH₃)₂PbI₄, nous avons déterminé expérimentalement les bandes de valence et de conduction et nous les avons comparées aux simulations de la fonction spectrale. Pour la pérovskite tridimensionnelle CH₃NH₃PbI₃, nous avons aussi déterminé les structures de bande expérimentale et simulée. Des signatures spectrales très larges ont été observées expérimentalement, ce qui relaxe les conditions de transition optique avec un impact éventuel sur l'efficacité des cellules solaires. Tant dans les expériences que dans les calculs, nous observons que le poids spectral suit une périodicité cubique alors que le système est structurellement dans une phase tétragonale. Cette contradiction apparente s'explique par la largeur spectrale des bandes, qui cache le repliement dû à la distorsion tétragonale. En ce qui concerne la dynamique de relaxation, nous avons observé que les porteurs photoexcités se thermalisent dans une échelle de temps subpicoseconde par couplage aux vibrations des cations organiques. À des échelles de temps plus longues (10~100 picosecondes), la diffusion électronique contrôle la dynamique. Cette dynamique est affectée par les défauts induits par recuit, qui localisent les électrons photoexcités pendant plus de 300 picosecondesThe efficiency of the photovoltaic process depends on the electronic band structure of the active material and the charge carrier dynamics. In this thesis, we have studied how these issues are related to the atomic structure in materials for two different technologies of solar cells, namely silicon heterostructure solar cells, and hybrid organic-inorganic perovskite solar cells. In silicon heterostructure solar cells, we have analyzed the impact of defects on the electronic properties of amorphous silicon heterostructures (a-Si:H/a-SIC:H/c-Si) by core level and valence band spectroscopies. In particular, we have quantified the number of dangling bonds inside a-Si:H layer upon irradiation, we have identified the electronic states associated to them, and we have understood the transitions previously observed by photoluminescence. In perovskite solar cells, we have correlated the atomic structure, the electronic structure and the electronic dynamics for two- and three-dimensional hybrid organic-inorganic perovskites. We have used with this goal a whole panel of complementary techniques: X-ray diffraction, angle-resolved photoemission spectroscopy, inverse photoemission spectroscopy, and time-resolved two-photon photoemission. In the two-dimensional perovskite (C₆H₅C₂H₄NH₃)₂PbI₄, the valence and conduction bands have been determined experimentally and compared to spectral function simulations. In the three-dimensional perovskite CH₃NH₃PbI₃, we have again determined the band structure and simulated it. Very broad spectral features have been experimentally observed, which relax the optical transition conditions impacting in the solarcell efficiencies. In both experiments and calculations, we observe that the spectral weight follows a cubic periodicity while the system is structurally in the tetragonal phase. This apparent contradiction is explained by the band broadness, which hides the band folding of the tetragonal distortion. As for the relaxation dynamics, we have observed that the photoexcited carriers thermalize in a subpicosecond time scale through the coupling to organic cation vibrations. At longer timescales (10~100 picoseconds), the electron diffusion controls the dynamics. This dynamics is affected by the annealing-induced defects, which localize the photoexcited electrons for more than 300 picoseconds
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Nguyen, Dinh Hai. "Analyse asymptotique, modélisation micromécanique et simulation numérique des interfaces courbées rugueuses dans des matériaux hétérogènes." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1067/document.
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Dans ce travail de thèse, il s'agit essentiellement de déterminer les propriétés mécaniques et physiques linéaires effectives des composites dans lesquels l'interface entre deux phases n'est pas lisse mais très rugueuse. Une approche efficace pour surmonter les difficultés provenant de la présence de rugosités d'interface consiste d'abord à homogénéiser une zone d'interface rugueuse comme une interphase équivalente par une analyse asymptotique et ensuite à appliquer des schémas micromécaniques pour estimer les propriétés effectives en tenant en compte de la présence de l'interphase équivalente. L'objectif principal de ce travail est de développer cette approche dans un cadre général où la surface autour de laquelle l'interface oscille périodiquement et rapidement peut être courbée et les phénomènes physiques concernés peuvent être couplés. Pour atteindre cet objectif, la conduction thermique est premièrement étudiée comme un prototype des phénomènes de transport non couplés pour élaborer dans un cadre simple les éléments essentiels de notre approche. Cette étude, préliminaire mais très utile au vu de l'importance des phénomènes de transport, montre que des résultats généraux et compacts peuvent s'obtenir quand l'interface est ondulée dans une seule direction et que des méthodes numériques sont en général nécessaires dans le cas où l'interface oscille suivant deux directions. L'approche développée et les résultats obtenus pour la conduction thermique sont étendus d'abord à l'élasticité linéaire et ensuite aux phénomènes physiques linéaires couplés tels que la thermoélectricité et la piézoélectricité. Dans ces cas plus complexes, des résultats généraux sont obtenus pour les composites stratifiés avec les interfaces ondulées dans une seule direction et des méthodes numériques sont élaborées pour les composites dans lesquels les interfaces oscillent suivant deux directionsThis work is essentially concerned with determining the effective linear mechanical and physical properties of composites in which the interface between two phases is not smooth but very rough. An efficient approach to overcome the difficulties arising from the presence of interfacial roughness is first to homogenize a rough interface zone as an equivalent interphase by an asymptotic analysis and then to apply micromechanical schemes to estimation of the effective properties while accounting for the equivalent interphase. The present work aims mainly to develop this approach in a general situation where the surface around which an interface oscillates periodically and quickly can be curved and the physical phenomena involved can be coupled. To achieve this goal, thermal conduction is first studied as a prototype of transport phenomena so as to elaborate key elements of our approach in a simple situation. This study,even preliminary but very useful in view of the importance of transport phenomena, shows that general and compact results can be obtained when the interface is corrugated in only one direction and that numerical methods are generally required when an interface is curved along two directions. The approach developed and the results obtained for thermal conduction are extended first to linear elasticity and then to linear coupled physical phenomena such as thermoelectricity and piezoelectricity. In these more complex cases, general results are obtained for composite laminates with interfaces oscillating in only one direction, and numerical methods are elaborated for composites in which the interfaces oscillate in two directions
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DeBenedetto, Louis J. "A Survey of Scalable Real-Time Architectures for Data Acquisition Systems." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/606834.
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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, NevadaToday’s large-scale signal processing systems impose massive bandwidth requirements on both internal and external communication systems. Most often, these bandwidth requirements are met by scalable input/output architectures built around high-performance, standards-based technology. Several such technologies are available and are in common use as internal and/or external communication mechanisms. This paper provides an overview of some of the more common scalable technologies used for internal and external communications in real-time data acquisition systems. With respect to internal communications mechanisms this paper focuses on three ANSI-standard switched fabric technologies: RACEway (ANSI/VITA 5-1994), SKYchannel (ANSI/VITA 10-1995) and Myrinet (ANSI/VITA 26-1998). The discussion then turns to how Fibre Channel, HiPPI, and ATM are used to provide scalable external communications in real-time systems. Finally, glimpse of how these technologies are evolving to meet tomorrow’s requirements is provided.
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Hedroug, Karima. "Influence des chromates sur l'hydratation de la pate de ciment portland, durcissant au contact d'armatures galvanisees." Toulouse 3, 1987. http://www.theses.fr/1987TOU30192.
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Les ions chromates jouent le role d'inhibiteur dans la prise des pates de ciment portland car le zinc, constituant de la derniere couche de galvanisation est dans son domaine de passivation car le ph de la solution est tres faible
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Tran, Anh-Tuan. "Modélisation et simulation des interfaces non classiques dans l’écoulement de Stokes et dans les composites élastiques fibreux." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1071/document.
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Ce travail de thèse, constitué de deux parties apparemment très différentes, a pour objectif commun de modéliser et simuler certaines interfaces non classiques en mécanique des fluides et en mécanique des solides. Dans la première partie qu'est la partie principale du travail, l'écoulement de Stokes d'un fluide dans un canal encadré par deux parois solides parallèles est étudié. La surface d'une paroi étant supposée lisse, la condition d'adhérence parfaite classique est adoptée pour l'interface fluide-solide homogène correspondante. La surface de l'autre paroi étant supposée rugueuse et capable de piéger de petites poches d'air, l'interface liquide-solide correspondante est donc hétérogène. La première partie de ce travail consiste à homogénéiser l'interface liquide-solide hétérogène de façon à remplacer cette dernière par une interface fluide-solide homogène imparfaite caractérisée par une longueur de glissement effective. Le problème essentiel de déterminer la longueur de glissement effective est résolu par le développement : (i) d'une approche semi-analytique dans le cas où la surface rugueuse est périodique; (ii) d'une approche basée sur la méthode de solution fondamentale dans le cas où la surface rugueuse est aléatoire. Les résultats obtenus par les approches développées sont systématiquement comparés avec ceux délivrés par la méthode des éléments finis. La deuxième partie du travail est de déterminer les modules élastiques effectifs d'un composite fibreux dans lequel les interfaces entre la matrice et les fibres sont imparfaites et décrites par le modèle membranaire. Une méthode numérique efficace basée sur la transformée de Fourier est ainsi développée et implantée pour traiter le cas général où la section d'une fibre peut avoir une forme quelconqueThe present work, consisting of two seemingly very different parties, aims at modeling and simulating some non-classical interfaces in fluid mechanics and solid mechanics. In the first part which is the main part of the work, the Stokes flow of a fluid in a channel bounded by two parallel solid walls is studied. The surface of a solid wall being assumed to be smooth, the classic perfect adherence condition is adopted for the corresponding homogeneous fluid-solid interface. The surface of the other wall being taken to be rough and capable of trapping small pockets of air, the corresponding liquid-solid interface is heterogeneous. The first part of this work is to homogenize the heterogeneous liquid-solid interface so as to replace it by an imperfect homogeneous fluid-solid interface characterized by an effective slip length. The essential underlying problem of determining the effective slip length is achieved by developing: (i) a semi-analytical approach when the rough surface is periodic; (ii) an approach based on the fundamental solution method when the surface is randomly rough. The results obtained by the developed approaches are systematically compared with those issued from the finite element method. The second part of the work is to determine the effective elastic moduli of a fiber composite in which the interfaces between the matrix and fibers are imperfect and described by the membrane model. An efficient numerical method based on the fast Fourier transform is developed and implemented to treat the general case where the section of a fiber can be of any shape
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Wang, Zhaoguang. "Interactive project review of deformable parts through haptic interfaces in Virtual Reality." Phd thesis, Université Rennes 1, 2011. http://tel.archives-ouvertes.fr/tel-00608499.
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Prototypes physiques sont de plus en plus remplacé par des prototypes virtuels dans la mise en {\oe}uvre industrielle de Product Lifecycle Management. L'évaluation de la conception d'une pièce mécanique industrielle déformable joue un rôle important en terme de validation de ses propriétés fonctionnelles. Du point de vue industriel, un modèle déformable formulées par la méthode des éléments finis est habituellement employée. Toutefois, l'emploi du modèle n'est pas simple en temps réel interactions, en particulier lorsque les interfaces haptiques sont introduits dans ces déformation demandes d'évaluation. Récemment, une approche de pré-calcul basé sur la méthode de réduction de modèle a été largement utilisée pour réduire les charges de calcul en temps réel. L'objectif principal de cette thèse est d'étendre l'approche de pré-calcul vers la validation de la conception de pièces mécaniques déformables pour enquêter sur la question de compromis entre l'exactitude de déformation et de la performance interaction. L'idée principale est de concevoir des techniques de traitement hors-ligne de pré-calculs et les interactions en ligne haptique. En particulier, nous développons un système de déformation en temps réel de simulation en proposant une méthode en deux étapes, associant une phase hors-ligne et une phase en ligne. Au cours de la phase hors-ligne, nous calculons la déformation des espaces basée sur l'analyse modale. Le hors-ligne de pré-calculs contribuer à la modélisation d'un modèle de déformation en temps réel sans coût qui convient à des interactions haptiques. En outre, nous proposons une méthode de maillage hors-ligne analyse de pré-calculer les espaces déformation modale en ce qui concerne les scénarios prévus évaluation déformation. Un interrupteur en temps réel entre ces différents espaces est développé de telle sorte que les calculs de déformation en ligne peuvent se concentrer sur les degrés de liberté où sont nécessaires. Au cours de la phase en ligne, nous divisons le processus de déformation en temps réel de calcul en deux modules distincts qui sont mis en {\oe}uvre sur différents processus pour assurer l'exécution interaction en temps réel haptique. Un module est consacré à la tâche de mise haptique, qui est mis en {\oe}uvre par l'extraction d'une sous-matrice de la pré-calculées matrice modale, tout en l'autre module est consacré au calcul de déformation et de la tâche de visualisation. Pour vérifier la méthode proposée dans cette thèse, nous réalisons des expériences d'interaction en interagissant avec les différents modèles avec une complexité croissante. Les résultats expérimentaux montrent que notre méthode peut traiter efficacement la question de compromis, que la modélisation de la déformation est formulée par la méthode des éléments finis qui garantit la précision de déformation. Et d'ailleurs, les calculs lourds de grands systèmes élastiques sont survenus hors ligne qui assurent un modèle de déformation sans coûts d'intervention en temps réel.
Book chapters on the topic "Interface raide"
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McCay, Allan. "Neurobionic Revenge Porn and the Criminal Law." In Neurointerventions and the Law, 168–88. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190651145.003.0008.
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Brain computer interfaces make possible a form of neurobionic agency in which people interact with the Internet by mental action, without the need for a bodily movement. This chapter considers the possibility of someone uploading intimate images of another person, without their consent, onto social media by way of brain–computer interface. The author highlights the novel and perhaps problematic nature of the options for response to such offending (given current doctrine) that are available to the criminal law. The example of revenge porn is used as a case study to very tentatively consider the criminal law’s response to neurobionic offending more generally. While the law has criminalized bodily actions, omissions and certain kinds of status, neurobionic agency falls into none of these traditional categories, and some issues flow from this failure. The author argues that neurobionic revenge porn would present a challenge to the criminal law relating to the determination of the conduct that constitutes the actus reus. Thus, if the courts are required to respond to this kind of offending, it will raise questions about a concept that is currently central to the criminal law.
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Rocha, Maria Alciléia Alves, and Gabriel de Almeida Souza Carneiro. "An Inclusive Method to Support the Web Accessibility Assessment and Awareness-Raising." In Interactivity and the Future of the Human-Computer Interface, 27–49. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2637-8.ch002.
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Web content should suit both a general audience and visually-impaired individuals. Therefore, Web applications should be assessed against accessibility standards as Web Content Accessibility Guidelines (WCAG) and the Brazilian e-Government Accessibility Model (eMAG). This chapter presents MIAV's development process and the obtained results. The MIAV complies with the WCAG and eMAG, combining automated and user-opinion-based assessment approaches. First, a pilot test was run to fine-tune MIAV. Next, participants were asked to identify and report several accessibility issues on IFFluminense's Portal, Q-Academico, and Moodle. They then suggested enhancements for better browsing experience. AccessMonitor was run and tested the same Web pages to generate two indicators: the average accessibility index and the percentage of nonconformities by accessibility level. Results showed that none of the evaluated applications met all the accessibility criteria. These experiments allowed IFFluminense's IT degree students to raise an awareness of the significance of Web accessibility.
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Marache-Francisco, Cathie, and Eric Brangier. "The Gamification Experience." In Emerging Research and Trends in Interactivity and the Human-Computer Interface, 205–23. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4623-0.ch010.
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Through this chapter, the authors aim at describing Gamification—the use of game elements in non-ludic environments—to identify its limits and lacks as well as its assets. Indeed, it has been developed to answer a need that arouses out of the Human Computer Interaction (HCI) field evolutions, and it could be valuable in that scope. The authors propose a definition of Gamification according to several different dimensions that are part of the HCI design field. They suggest it as a first step towards a guiding design framework aimed at designers. They mention future research directions that would help in going further and enriching the framework, leading to the creation of a design model for user experience design through Gamification. The authors finally raise some ethical concerns about the meaning of Gamification itself.
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Issa, Tomayess, and Pedro Isaias. "Promoting Human-Computer Interaction and Usability Guidelines and Principles Through Reflective Journal Assessment." In Emerging Research and Trends in Interactivity and the Human-Computer Interface, 375–94. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4623-0.ch019.
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This chapter aims to examine the challenges to, and opportunities for, promoting Human Computer Interaction (HCI) and usability guidelines and principles through reflective journal assessment by information systems students from the Australian and Portuguese higher education sectors. In order to raise students’ awareness of HCI and aspects of usability, especially in the Web development process, a new unit was developed by the first researcher called Information Systems 650 (IS650) in Australia. From this unit was derived the Web Site Planning and Development (WSPD) course introduced in Portugal. The reflective journal assessment approach was employed to enhance students' learning and knowledge of HCI and its usability aspects. This study provides empirical evidence from 64 students from Australia and Portugal, based on quantitative and qualitative data derived from three sources: students’ formal and informal feedback and an online survey. Students confirmed that the use of reflective journal assessment consolidated their understanding of HCI and usability guidelines and principles and improved their reading, searching, researching, and writing skills, and their proficiency with the endnote software.
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Verhoeff, Nanna. "Sensing Screens: From Surface to Situation." In Screen Genealogies. Nieuwe Prinsengracht 89 1018 VR Amsterdam Nederland: Amsterdam University Press, 2019. http://dx.doi.org/10.5117/9789463729000_ch04.
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Nanna Verhoeff considers recent screen-based public art installations that extend from their architectural site into surrounding urban space in order to engage techniques of ‘remote sensing’, interactivity, and public display. In these installations, Verhoeff identifies a genre of artwork that aims to raise awareness of urban social issues by visualizing and making ‘present’ otherwise invisible crises relating to the meeting of the social and the environmental. These installations compel one to look past the surface of the screen to its surrounding situation. Verhoeff thus reorients cinematic concepts of the dispositif towards a broader spectatorial territory, which she identifies by its building-scaled interfaces that reach beyond their location to remake, create, and influence the physical context by sensibly linking it to other, more distant spaces.
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Sledge, William H., and Julianne Dorset. "Organization of psychiatric services for general hospital departments." In New Oxford Textbook of Psychiatry, edited by John R. Geddes, Nancy C. Andreasen, and Guy M. Goodwin, 1392–400. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198713005.003.0137.
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A modification in consultation liaison psychiatry/psychosomatic medicine is introduced and explored by a review of the concepts of prevention and proactivity in other disciplines of medicine. Three major advantageous outcomes of a proactive/preventive approach are noted—namely, early recognition and treatment result in less mortality and morbidity, staff satisfaction, and care that is less expensive overall. Three psychiatric proactive programmes that have been published are reviewed. These are: the Rapid Assessment, Interface, and Discharge (RAID) model in the United Kingdom, developed to serve the City Hospital of Birmingham; the quality improvement programme of co-management with internist developed at Columbia University Medical Center; and the Behavioral Intervention Team (BIT) of the Yale School of Medicine. All three are economically effective, provide innovative approaches to co-management of patients with co-occurring mental and physical illnesses, and aim to develop integrated care.
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Rather, Gulzar Ahmed, Mir Zahoor Gul, Muzafar Riyaz, Arghya Chakravorty, Mohd Hashim Khan, Anima Nanda, and Mohd Yasin Bhat. "Toxicity and Risk Assessment of Nanomaterials." In Handbook of Research on Nano-Strategies for Combatting Antimicrobial Resistance and Cancer, 391–416. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-5049-6.ch019.
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The development and advancement of nanotechnology has led to widespread use of nanomaterials (NMs) in a wide variety of fields, including the environment, agriculture, biomedicine, industry, and human health. Nanomaterials may interfere with biological systems due to their smaller size and increased surface area ratios in terms of volume which may raise unanticipated toxicological apprehensions. The minute nature of the particles may cross biological margins and induce toxicity in vital organs like the human brain and placenta. Moreover, environmental exposures to NMs are inevitable, which have become crucial parts of our daily routine lives and consequently, search for the nanotoxicity is gaining attention to lessen or get rid of the toxic impacts of the NMs. The safety concerns and risk assessment of NMs have been raised significantly in research community circles, industries, and regulatory bodies. The information in the concerned section, obtained from current literature and toxicological effects of NMs research are assorted.
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Abel, William, Elizabeth Kahn, Tom Parr, and Andrew Walton. "7. Basic Income and Distributive Justice." In Introducing Political Philosophy, 93–108. Oxford University Press, 2021. http://dx.doi.org/10.1093/hepl/9780198783275.003.0007.
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This chapter defends basic income. This policy requires the state to make regular cash payments to each member of society, irrespective of their other income or wealth, or willingness to find employment. It starts by describing three effects of basic income. The first is that it will raise the incomes of the least advantaged. The second is that it will protect against the threats of exploitation and abuse. The third is that it will remove one obstacle to finding employment. The chapter then explains the significance of these effects by drawing on ideas about distributive justice, emphasizing the relevance of John Rawls’s justice as fairness and Elizabeth Anderson’s democratic equality. It also considers the claim that basic income should be rejected because it would require the state to interfere with the lives of those who would be taxed to fund it, arguing that it is a mistake to oppose taxation in such a wholesale way. The chapter concludes with a reflection on the economic sustainability of basic income.
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Erdos, David. "Second-Generation European Data Protection Regulation and Professional Journalism." In European Data Protection Regulation, Journalism, and Traditional Publishers, 123–50. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198841982.003.0007.
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Drawing on the results of both a questionnaire and a public domain website review, this chapter explores the enforcement stance and track record of European Data Protection Authorities (DPAs) vis-à-vis the professional journalistic media under the Data Protection Directive. Approximately 80 per cent of DPAs accepted that they possessed regulatory powers in this regard and over 60 per cent reported having undertaken some enforcement. However, the number who conceptualized their powers to be partial was far higher than that set out in statutory law and half the DPAs which did report enforcement had only intervened in relation to one or two often quite diffuse areas of data protection. The website review verified enforcement for 40 per cent of the DPAs and confirmed that activity had often focused on data linked either to specific privacy interests (especially where sensitive data was involved) and/or data whose safeguarded treatment underpinned critical socio-economic relationships (e.g. national identification numbers). In general, action had been very patchy, with a notable absence of intervention even in relation to issues that only raise limited free speech concerns such as avoiding or rectifying significant inaccuracies. This patchiness could not be fully explained by statutory law (which often remained quite prescriptive), the general need for contextual rights balancing, limited resourcing, or the need for an interface with self-regulation. Nevertheless, enforcement was strongly and positively correlated with the stringency of local law. Relationships with DPA resources were more mixed although there was a significant positive association between enforcement and the per capita human resources available to a regulator.
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Wisniewski, Piotr. "The Management and Performance of Social Media Initial Public Offerings (IPOs)." In Analyzing the Strategic Role of Social Networking in Firm Growth and Productivity, 1–21. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0559-4.ch001.
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Social media companies have increasingly used global stock exchanges to raise fresh capital needed to expand and commercialise their business models. Despite the soaring proliferation of social media interactions and improving economic fundamentals, many of the high-profile IPOs have underperformed on debut and in secondary trading. This chapter seeks to identify success and failure factors of social media stock market flotations from the operational, industrial and financial perspectives. The research features flagship social media IPOs comprised by the most representative social media Exchange Traded Fund (ETF), the Global X Social Media Index ETF (SOCL), which replicates the price and return performance of the globally recognised Solactive Social Media Total Return Index. The analysis sums up the early evidence of IPO organisation with regard to social media issuers and posits three decisive factors in this process related to: flotation timing, pricing and pre-IPO business integration. The research offers some practical recommendations for future social media IPOs as well as directions for further academic studies at the interface of social media industrial, economic and capital market activity. The following takeaways concerning social media IPOs emerge from the study: 1) Staging and timing: social media companies should mull flotations when a clear-cut path toward cash generation and accrual profits is observable (chronically cash deficient and unprofitable social media tend to underperform on debut and in post-IPO trading) and amid protracted bull markets so as to raise the odds of a propitious IPO climate; 2) Organisation and management: the success of social media going public decisions is a function of seamless IPO organisation (including conservative pricing, share dilution tied to envisaged liquidity and capital expenditure as well as trading and clearing system reliability); 3) Issuer characteristics: social media IPOs are facilitated by businesses commanding a dominant position on the home market, having a diversified core business (including exposure to non-media operations), coming on the stock market either as industry trendsetters or in the wake of successfully executed IPO benchmarks; 4) Factor coalescence: no isolated factor discussed in this chapter can fully explain the performance of a social media IPO – it is rather their combination and interconnectivity that can comprehensively attest to the success or failure of a going public strategy employed by a social media company. From the investment standpoint, the case study analysis demonstrates that a case-by-case (rather than sectoral) approach needs to be adopted for investors seeking to derive gains from social media IPOs, as passive exposure to the entire industry (e.g. via index tracking) is not per se a guarantor of market competitive investment performance.
Conference papers on the topic "Interface raide"
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Ariefianto, Tody, Leanna Vidya Yovita, and Didin Olviovitha. "Performance analysis of AoE-SAN using bonding interface over RAID." In 2014 2nd International Conference on Information and Communication Technology (ICoICT). IEEE, 2014. http://dx.doi.org/10.1109/icoict.2014.6914049.
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Liu, Ruifang, Changsheng Xie, and Xiaoming Dong. "A fibre channel RAID supporting multiple protocol disk interfaces." In Seventh International Symposium on Optical Storage (ISOS 2005), edited by Fuxi Gan and Lisong Hou. SPIE, 2005. http://dx.doi.org/10.1117/12.649832.
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Gallagher, Douglas V., and Ronald A. L. Rorrer. "Incorporation of Manufacturing Process Design Into the Senior Capstone Design Course." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-65333.
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At the University Colorado Denver, a manufacturing process design course was specifically created to raise the level of the as constructed senior design projects in the department. The manufacturing process design course creates a feed forward loop into the senior design course, while the senior design course generates a feedback loop into the process design course. Every student and student project has the opportunity to utilize CNC mills and lathes where appropriate. Specific emphasis is placed upon the interfaces from solid models to CAM models and subsequently the interface from CAM models to the machine tool. Often the construction of many senior design projects approaches the level of blacksmithing due to time constraints and lack of fabrication background. Obviously, most engineering students have neither the time nor the ability to become expert fabricators. However, the wide incorporation of CNC machining in the program allows, an opportunity to not only raise the quality of their prototypes, but also to immerse in the hands on experience of living with the ramifications of their own design decisions in manufacturing. Additionally, some of the art of fabrication is turned into the science of fabrication. The focus of this paper will be primarily on examining the effect of formal incorporation of the manufacturing process in the capstone design course.
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Lins Chung, Minjae, Vitor Bremgartner da Frota, Priscila Silva Fernandes, and Luis Rivero. "Proposta de Interface para Um Sistema Inteligente para Gerenciamento de Energia Fotovoltaica no Contexto Brasileiro." In Computer on the Beach. São José: Universidade do Vale do Itajaí, 2021. http://dx.doi.org/10.14210/cotb.v12.p496-498.
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Considering the imbalance between economic development andthe environment, there is a concern with the preservation of theplanet’s natural resources and the use of renewable and sustainableenergies. In this context, new systems have emerged to assist in themanagement of photovoltaic energy. This paper presents a proposalfor an intelligent interface for a Web system to monitor, report andconsult on the production of energy and health of photovoltaic panels.To raise the requirements and propose the system’s graphicalinterface, the following techniques were used: (a) benchmarking, inwhich the functionalities of the largest competitors in the marketwere compared; and (b) document analysis, where comments oncompeting systems on their social networks were analyzed. Theprototype presented allows to observe the production of energy indifferent periods, besides allowing to check the health of a panel,as well as its individual performance.
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Di Bartolomeo, Mariano, Francesco Massi, Anissa Meziane, Laurent Baillet, and Antonio Culla. "Dynamics of Rupture at Frictional Rough Interfaces During Sliding Initiation." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-25247.
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The aim of this work is to present the results from a non linear finite element analysis in large transformations of the contact interface between two deformable bodies when sliding initiates and the roughness is introduced at the contact surfaces. The two-dimensional in-plane dynamic model consists of two different isotropic elastic media separated by an interface governed by Coulomb friction law, and subject to remotely applied normal and shear tractions (pre-stress phase). Once the ratio between the local values of tangential and normal stresses reaches the limit value, the sliding initiates and local ruptures are activated (nucleation phase). The propagation of the ruptures over the interface and the wave propagation inside the solids are analyzed. The interactions between the waves propagating into the two solids (P waves, shear waves, surface waves) give raise to different types of ruptures. They can be classified depending on their velocity front (sub-Rayleigh, sub-shear, super-shear) or on their interface states (pulse-like, crack-like). A sinusoidal roughness is introduced at the contact surfaces and the analysis is performed for different values of the roughness parameters. Depending on the relative dimension between the roughness wavelength and the width of the wave fronts, two different behaviour can be observed: i) a coupling between the wave propagating into the two bodies; ii) a decoupling of the wave propagation inside the two materials, characterized by an independent wave propagation. First the wave propagation is analyzed when a single rupture is originated in pre-sliding conditions; successively, the wave generation during sliding initiation is addressed.
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Zhang, Yi, and Gary J. Cheng. "Multilayer Laser Sintering of HAp/Ti Nanoparticles Onto Metallic Implants." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84089.
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Novel methodology of laser sintering of mixture of mixture of bio-ceramics and metallic nanoparticles on metallic implants is introduced in current work. Feasibility of this method is demonstrated using a multiphysics numerical simulation. Treating laser beam as electromagnetic (EM) wave, EM module is coupled with heat transfer (HT) module. The EMHT scheme analyzes the interaction between laser-nanoparticles which ends up with temperature raise within the sample. As a demonstration, HAp and Ti nanoparticles are employed to be sintered on titanium substrate. Processing parameters such as laser power, beam radius, scan speed, and layer thickness are studied, and correlation between these parameters and final temperature is presented. Effects of mixing ratio and nanoparticle size are also examined. Considering effects of mixing ratios and particle sizes, the following coating scheme is proposed for future experiments: varying HAp concentration from 100% to 0% at 10% intervals from coating surface to coating/substrate interface, and meanwhile, varying particle diameters from 500 nm to 100 nm at 100 nm intervals.
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Feiye, Liao, Jiang Pingting, Liu Wang, and He Dongyu. "Research on Emergency System of Injection Estimation of Reactor Core Recovery and Reactor Core Decay Heat Removal." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-66110.
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One of the lessons learned from Fukushima accident is that the existing procedures used in Nuclear Power Plants (NPPs) are not executed effectively and quickly enough after such an extended accident, for the accident is complex and people are too nervous in such a situation. Thus, emergency system that helps to raise diagnosis efficiency is necessary. In the paper, a quick diagnosis system on injection estimation of reactor core recovery and decay heat removal injection estimation is developed to meet the urgent needs and strengthen requirements for the training and application among utilities and nuclear regulators. The system will assist regulators to quickly know whether the currently flow will probably recover the reactor core, or whether the current injection capacity is sufficient to quench and recover the reactor core, directly after input present parameters into the system. In the system, Matlab method is used, and intuitive insights are considered, which is propitious to give immediate graphical interface and reduce possibility of human error.
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SadAbadi, Hamid, Muthukumaran Packirisamy, A. Dolatabadi, and Rolf Wuthrich. "Effects of Electrode Switching Sequence on EWOD Droplet Manipulation: A Simulation Study." In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-31212.
Full textAbstract:
Electrowetting-on-dielectric (EWOD) is a new method for handling droplets on the microfluidic chips. By applying electrical potential, the interfacial energy of liquid-solid interface changes, results altering of droplet contact lines. To increase the flow rate of such a digital microfluidic system one way is to raise the droplet velocity. One important factor for enhancing droplet velocity in EWOD systems is the proper switching the electrodes or “switching sequence”. To examine the effect of switching in EWOD, the EDEW 1.0 simulation tool is used in this paper. By simulating the motion of a 1μL water droplet in a 1D electrode array, the resultant surface energy curves during the motion of droplet in different electrode switching sequences are obtained. The results show proper electrode switching has a remarkable effect on increasing of droplet velocity. To enhance the droplet velocity, the electrode, which is placed next to the droplet at forward direction, should be powered after droplet passed over it. In addition, it would be more efficient to first turn on the next electrode, and then turn off the previous one.
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De Sousa Brito, Matheus, Diego Bruzaca de Souza, Luís Victor Bastos Rezende, Gabriel Fortes Marques, Priscila Silva Fernandes, Vitor Bremgartner da Frota, and Luis Rivero. "Definindo um Sistema de Monitoramento em Tempo real para o Transporte Público da Cidade de Manaus." In Computer on the Beach. São José: Universidade do Vale do Itajaí, 2021. http://dx.doi.org/10.14210/cotb.v12.p490-492.
Full textAbstract:
The management of public transportation suffers from the difficultyof predicting population growth and consequently meet its demandsin terms of quality and safety. With regard to safety, several computersystems have emerged to help prevent and treat transportproblems, such as detour of routes and speeding. However, in thecontext of the Manaus city, these systems cannot: (a) detect specificobjects (firearms, knives, among others) to identify assaults; and (b)identify overcrowding in means of transportation. The inclusion ofthese functionalities with the above mentioned ones may allow accessto more information to subsidize decision making and improvethe quality of security offered by the public transportation service.This article presents a proposal for an intelligent system to monitorthe safety of a bus related to the above mentioned points. In orderto raise the requirements and propose the graphical interface of thesystem, the techniques of benchmarking and focus group were used.The prototype presented allows simulating how the informationwould be presented to those responsible for monitoring the bus,in addition to generating reports for monitoring the history of themeans of transport and to support decision making regarding thesafety of passengers and servers.
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Fadl, M., and L. He. "On LES Based Conjugate Heat Transfer Procedure for Transient Natural Convection." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63600.
Full textAbstract:
Natural convection prediction closely relevant to flexible operations (e.g. fast and frequent startups and showdowns) of gas turbines and steam turbines presents considerable challenges. The strong inter-dependence between fluid and solid parts points to the need for conjugate heat-transfer (CHT) methods. However, the long time scales of the practical operation processes of interest, and the fundamental fluid-solid time scale disparity raise general issues regarding the computational costs of the CHT methods. In particular, if a high-fidelity flow model (e.g. LES) needing to resolve smaller time scales of turbulence is adopted, we also face an additional question regarding the consistency and accuracy of the fluid-solid interface treatment. In this paper, we address the issues by the means of a loosely coupled CHT procedure based on the multi-scale methodology recently proposed for transient conjugate heat transfer predictions. The multi-scale framework provides an efficient way for accurately solving problems with a huge scale disparity. A particular emphasis of the present work is on efficient and accurate transient CHT solutions in conjunction with the turbulence eddy resolved modelling (LES) for natural convection. A multi-scale flow decomposition associated with the corresponding time step split is adopted. The resultant triple timing formation of the flow equations can be solved efficiently for the fluid-solid coupled system with very disparate time scales. The methodology will be presented with case studies supported by a new interface analysis to underpin the problem statement and motivation of the present work, and to demonstrate the validity and effectiveness of the methodology and implemented procedure.