Thematische Bibliographien / STM simulations

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Auswahl der wissenschaftlichen Literatur zum Thema „STM simulations“

Autor: Grafiati

Veröffentlicht am 28. September 2024

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Zeitschriftenartikel zum Thema "STM simulations"

Wilson, J. H., D. A. McInnes, J. Knall, A. P. Sutton und J. B. Pethica. „Quantitative voltage-dependent STM image simulations for semiconductors“. Ultramicroscopy 42-44 (Juli 1992): 801–8. http://dx.doi.org/10.1016/0304-3991(92)90361-m.

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Bocquet, Marie-Laure, und Bin Wang. „Metal–organic interaction probed by First Principles STM simulations“. Progress in Surface Science 85, Nr. 9-12 (September 2010): 435–59. http://dx.doi.org/10.1016/j.progsurf.2010.09.001.

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Tremblay, Jean Christophe, und María Blanco-Rey. „Manipulating interfacial hydrogens at palladium via STM“. Physical Chemistry Chemical Physics 17, Nr. 21 (2015): 13973–83. http://dx.doi.org/10.1039/c5cp00663e.

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In this contribution, we provide a quantum dynamical analysis of the interfacial hydrogen migration mediated by scanning tunneling microscopy (STM). It is observed that the hydrogen impurity favors resurfacing over occupation of the bulk and subsurface sites whenever possible. The present simulations give strong indication that the experimentally observed protuberances after STM-excitation are due to H accumulating in the vicinity of the surface.

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Zhang, Rui, Liang Li, Laszlo Frazer, Kelvin B. Chang, Kenneth R. Poeppelmeier, Maria K. Y. Chan und Jeffrey R. Guest. „Atomistic determination of the surface structure of Cu2O(111): experiment and theory“. Physical Chemistry Chemical Physics 20, Nr. 43 (2018): 27456–63. http://dx.doi.org/10.1039/c8cp06023a.

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Nakagiri, Nobuyuki, und Hiroshi Kaizuka. „Simulations of STM Images and Work Function for Rough Surfaces“. Japanese Journal of Applied Physics 29, Part 1, No. 4 (20.04.1990): 744–49. http://dx.doi.org/10.1143/jjap.29.744.

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Rochefort, Alain, Stéphane Bedwani und Alejandro Lopez-Bezanilla. „Evidence for π-Interactions in Stacked Polymers by STM Simulations“. Journal of Physical Chemistry C 115, Nr. 38 (September 2011): 18625–33. http://dx.doi.org/10.1021/jp204832q.

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Magoga, Michaël, Fabien Archambault und Jorge I. Cerdá. „Nt_STM: A step forward in Scanning Tunneling Microscopy (STM) simulations“. Computer Physics Communications 183, Nr. 6 (Juni 2012): 1246–49. http://dx.doi.org/10.1016/j.cpc.2012.02.003.

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Rubio-Verdú, C., G. Sáenz-Arce, J. Martinez-Asencio, D. C. Milan, M. Moaied, J. J. Palacios, M. J. Caturla und C. Untiedt. „Graphene flakes obtained by local electro-exfoliation of graphite with a STM tip“. Physical Chemistry Chemical Physics 19, Nr. 11 (2017): 8061–68. http://dx.doi.org/10.1039/c6cp07236d.

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LI QUN-XIANG, YANG JIN-LONG, HOU JIAN-GUO, WANG KE-LIN und ZHU QING-SHI. „THEORETICAL SIMULATIONS OF STM IMAGES FOR C60 WITH DIFFERENT ADSORBED ORIENTATIONS“. Acta Physica Sinica 48, Nr. 8 (1999): 1477. http://dx.doi.org/10.7498/aps.48.1477.

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Máca, F., W. A. Hofer und J. Redinger. „Ab initio simulations and STM-images for Co/Pt(110) surfaces“. Surface Science 482-485 (Juni 2001): 844–49. http://dx.doi.org/10.1016/s0039-6028(01)00741-5.

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Dissertationen zum Thema "STM simulations"

Lesnard, Hervé. „Structure électronique de molécules aromatiques sur une surface sondée par STM : apports récents des simulations“. Lyon, École normale supérieure (sciences), 2009. http://www.theses.fr/2009ENSL0553.

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Mes travaux théoriques concernent les potentialités du microscope STM pour induire deux types d’excitations locales, soit vibrationnelle soit électronique, sur des molécules aromatiques isolées adsorbées sur des surfaces. La spectroscopie vibrationnelle sous le microscope à effet tunnel (IETS pour «Inelastic Electron Tunneling Spectroscopy») est une technique récente qui mesure le spectre vibrationnel d’une seule molécule déposée sur une surface conductrice. A partir d’une tension seuil, on peut exciter une vibration moléculaire qui se traduit par un pic dans la dérivée de la conductance par rapport à la tension et la perte d’énergie de l’électron tunnel: c’est le signal vibrationnel inélastique. Pour des spectres mesurés sur Cu(100) de radicaux issus de la perte d’hydrogènes du benzène comme le phényl et le benzyne (groupe de W. Ho, Irvine), nos simulations du signal inélastique atteignent un niveau de comparaison quantitative permettant l’identification du radical. D’autre part, en dupliquant l’étude pour la déshydrogénation de la pyridine, nous montrons que l’hétéroatome en substitution ne modifie que l’intensité des signaux inélastiques. Enfin, nous montrons que les règles de sélection se rationalisent en tenant compte de la symétrie des états électroniques avant et après couplage électron-vibration et de l’état vibrationnel. Ensuite, nous nous intéressons à la réactivité électro-induite du biphényl sur Si(100) étudiée par STM (groupe de G. Dujardin, Orsay) qui montre une sélectivité régie par la polarité de l’impulsion de tension. D Par un calcul exhaustif de tous les chemins possibles, nous montrons que les barrières cinétiques de diffusion et de déshydrogénation fournissent la preuve que la sélectivité observée en fonction de la polarité d’impulsion de tension ne peut pas être attribuée directement à différentes énergies d'activation
The subject of my theoretical work deals with the capabilities of the STM tool to induce two types of local excitations, either vibrational or electronic on single adsorbed aromatic molecules on surfaces. Concerning vibrational excitations, the changes in tunneling conductance at vibrational thresholds have recently been used as an Inelastic Electron Tunneling Spectroscopy (IETS). We study the STM-induced dehydrogenation of benzene on Cu(100), where the reaction products could be either phenyl or benzyne fragments (group of W. Ho, Irvine). We demonstrate that they are solely identified with their theoretical IETS fingerprints being in quantitative agreement with the IETS measurements. We similarly investigate the dehydrogenation of pyridine and show that one heteroatom in the aromatic ring affects the magnitude of the IETS signatures. Conversely, we rationalize our findings in terms of inelastic propensity rules that couple the symmetry of the electronic scattering states and the molecular vibrators. In a second part, we study the electron-induced reactions of individual biphenyl molecules on a Si(100) surface, which have been investigated by using the tip of the STM as an atomic size source of electrons (group of G. Dujardin, Orsay). Selected types of molecular reactions are produced, depending on the polarity of the surface voltage during STM excitation. We determine all possible reaction pathways on the silicon surface, providing evidence that the observed selectivity as a function of the surface voltage polarity cannot be ascribed to different activation energies

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Vu, Van Binh. „Theoretical studies of novel graphene based nanostructures“. Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP039.

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Depuis sa découverte, le graphène est devenu un centre de recherche et d'intérêt important en raison de ses caractéristiques mécaniques, thermiques et électriques exceptionnelles. Néanmoins, l'absence de bande interdite dans le graphène constitue un obstacle aux applications dans les domaines de l'optique, de la nanoélectronique et de la spintronique. L'ingénierie de la bande interdite impliquant la nanostructuration du graphène a été développée au fil des ans, par exemple par confinement quantique, pour surmonter cette limitation. Ce travail théorique est consacré à la modification des réponses électroniques, optiques et de microscopie/spectroscopie à effet tunnel (STM/STS) en fonction de la taille du système de nouveaux matériaux de carbone tels que les nanomeshs de graphène (GNM), les boîte quantiques de graphène de forme/taille contrôlée (GQD) et les nanorubans de graphène (GNR), afin de comparer et d'analyser les données expérimentales. Ces nouveaux matériaux carbonés sont théoriquement déposés sur des surfaces d'or Au(111) dans une simulation STM réalisée à l'aide du formalisme des fonctions de Green hors équilibre (NEGF) basé sur la méthode DFT Fireball afin d'étayer les données expérimentales. En ce qui concerne les GQD, nous simulons leur spectre d'absorption en utilisant la correction GW et les équations de Bethe-Salpeter (BSE), si possible, pour les comparer directement aux données expérimentales. Dans le cas contraire, leurs propriétés optiques sont obtenues par une approche inférieure, l'approche Tight-Binding (TB). Les impacts des agrégations et des impuretés sur leurs réponses optiques sont également explorés en étudiant la bicouche torsadée des GQDs via la méthode TB. En outre, les changements dans les propriétés électroniques de ces nouveaux matériaux de carbone en fonction de la taille de leur système sont extraits à l'aide de la méthode TB. La performance de la méthode TB est vérifiée par des simulations DFT et GW. Enfin, d'autres matériaux de faible dimension, les nouvelles structures bicouches de nitrure de bore hexagonal torsadées à près de 30° (hBN-TBLs), sont également étudiées dans cette thèse. Les méthodes DFT et TB réalisent les structures électroniques et optiques de nouveaux hBN-TBLs plus loins de 30° afin d'obtenir les paramètres d'ajustement pour le modèle TB. Ces paramètres sont ensuite utilisés pour prédire des hBN-TBL plus proches de 30°, ce qui est difficilement réalisable par DFT
Since its discovery, graphene has become a focal point of extensive research and interest because of its exceptional mechanical, thermal, and electrical characteristics. Nevertheless, the absence of a bandgap in graphene constitutes a barrier to applications in optics, nanoelectronics, and spintronics. Bandgap engineering involving the nanostructuration of graphene has been developed over the years, such as by quantum confinement, to overcome this limitation. This theoretical work is dedicated to the change of electronic, optical, and scanning tunneling microscopy/spectroscopy (STM/STS) responses as a function of system size of new carbon materials like graphene nanomeshes (GNMs), shape/size controlled graphene quantum dots (GQDs) and graphene nanoribbons (GNRs), in order to compare and analyze experimental data. These new carbon materials are theoretically deposited on gold Au(111) surfaces in STM simulation performed using the Non-equilibrium Green's function (NEGF) formalism based on the Fireball DFT method to support the experimental data. Concerning GQDs, we simulate their absorption spectrum using the GW approximation and the Bethe-Salpeter equations (BSE), if possible, to compare directly with the experiment data. Otherwise, their optical properties are achieved by a lower approach, the Tight-Binding (TB) approach. Also, the impacts of aggregations and impurities on their optical responses are explored by studying the twisted bilayer of the GQDs via the TB method. Moreover, the changes in these new carbon materials' electronic properties as a function of their system size are extracted using the TB method. The performance of the TB method is verified by DFT and GW simulations. Finally, other low-dimensional materials, new close-to 30° twisted hexagonal boron nitride bilayer structures (hBN-TBLs), are also studied in this thesis. DFT and TB methods perform the electronic and optical structures of further 30° hBN-TBLs to obtain the fit parameters for the TB model. These parameters are then used to predict closer to 30° hBN-TBLs, which are hardly to be obtained by DFT

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Parditka, Bence. „Investigation of diffusion and solid state reactions on the nanoscale in silicon based systems of high industrial potential : experiments and simulations“. Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4348/document.

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La première partie de mes résultats concerne les phénomènes de diffusion induits par des effets de contrainte. Nous avons étudié ces effets d’un point de vu théorique, afin de comprendre le rôle de la contrainte dans la diffusion. Les résultats montrent que l’effet de contrainte ne semble pas induire d’effet mesurable sur le coefficient cinétique à l’interface, cependant le taux de mélange semble diminuer. La seconde partie concerne des mesures expérimentales, par EXAFS et GIXRF utilisées sur des empilements Ta/a-Si/Ni/a-Si/Ta/substrat permettant de suivre la formation des phases ainsi que la croissance, à une température donnée, et ce jusqu’à la formation de la phase Ni2Si et au delà. La troisième partie concerne le système Cu-Si. Nous avons suivi les premiers stades de la formation de la phase Cu3Si, en utilisant les techniques XRD, APT, SNMS, ainsi qu’un profilomètre et une mesure de résistance quatre points sur différents échantillons réalisés par pulvérisation. Dans le cas de l’empilement Cu/a-Si/substrat, la formation de phases a suivi une cinétique linéaire. Nous avons notamment mis en évidence la formation très rapide d’une phase qui apparait directement après le premier recuit très court, démontrant ainsi le rôle déterminant de la préparation des échantillons dans l’étude des processus de formation de phases. La quatrième partie s’intéresse au silicène : cette structure bidimensionnelle de silicium dite en « nid d’abeilles », réalisée sur un substrat d’argent et qui présente de grandes similitudes avec le graphène. En utilisant de façon complémentaire les techniques AES-LEED-STM, nous avons déterminé la limite de solubilité du silicium dans l’argent
Diffusion and related solid state reaction phenomena have been studied in four different material couples. The first section of the results concerned the diffusion related stress effects. We analyzed the question theoretically, for planar model geometry, to find the role of stress in diffusion. We obtained that stress effects do not have any measurable effects on the kinetic coefficient of the interface shift. However, the intermixing rate decreases. The second section we performed EXAFS and GIXRF experiments on sandwich structured Ta/a- Si/Ni/a-Si/Ta/substrate samples and followed the phase formation and growth at a given temperature at which the Ni2Si phase has formed and continued to grow. The third section we obtained in the Cu-Si system. We followed the early stages of phase formation of the Cu3Si phase under different circumstances. We performed XRD, APT, SNMS, profilometer and 4 wire resistance measurements on sputtering deposited samples. We found that in case of the Cu/a-Si/substrate samples the phase formation was followed by a linear kinetics. Secondly, prior to the linear phase growth, we observed an extremely fast phase formation that appeared immediately after the very first and shortest annealing, which showed that the preparation sequence of the sample is a crucial point in phase formation processes. The fourth section deals with the silicene. It is the honeycomb structured formation of Si atoms with properties similar to graphene. We investigated the dissolution of Si into Ag. We performed a combination of AES, LEED, STM measurements. We determined the dissolution limit of Si in Ag from data obtained from the AES measurements

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Boukari, Khaoula. „De la molécule unique au tapis supramoléculaire sur surface de silicium passivée : Simulations numériques à l'échelle atomique“. Thesis, Mulhouse, 2013. http://www.theses.fr/2013MULH8858/document.

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Ma thèse porte sur l’étude par simulations numériques à l’échelle atomique de l’adsorption de molécules uniques et d’auto-assemblages moléculaires sur la surface de silicium Si(111) dopée bore notée Si(111) (√(3 ) x√3)R30°-B. Après un premier chapitre de présentation des méthodes de calcul, puis un chapitre consacré à la surface Si(111)-B, la thèse se divise en deux grandes parties : l’une concernant l’adsorption de molécules uniques et l’autre consacrée à l’adsorption de tapis moléculaire.La première partie concerne l’adsorption de molécules uniques sur la surface de Si(111) (√(3 ) x√3)R30°-B. Nous avons plus particulièrement étudié trois molécules présentant des mécanismes d’adsorption différents : la molécule de pyridile-azobenzène, une molécule de la famille des porphyrines (Cu-TBPP) et deux molécules appartenant à la famille des phtalocyanines (H2Pc et CuPc). Dans chaque étude, nous avons effectué une étude énergétique, structurale et électronique. Dans la plupart des cas, nous avons complété l’étude par un calcul d’image STM pour comparer avec les résultats expérimentaux. A partir de cette étude, nous avons montré que les molécules interagissent différemment avec la surface via des interactions électrostatiques, des liaisons datives, des liaisons ioniques et un mécanisme de cycloaddition. La deuxième partie de la thèse est dédiée à l’étude de l’auto-assemblage de molécules organiques sur la surface Si(111) (√(3 ) x√3)R30°-B. L’auto-assemblage moléculaire est une technique permettant la fabrication d’architectures hautement organisées à l’échelle atomique. Nous avons étudié trois molécules différentes formant un auto-assemblage sur la surface de Si(111)-B : 1,3,5-tri(4-bromophényle benzène) notée TBB, 1,3,5-tri(4-iodophényle benzène) notée TIB et 1,3,5-triphenylbenzene notée THB. Comme la formation d’un réseau auto-organisé est la conséquence d’un équilibre entre les interactions molécule-molécule et molécules-substrat, nous avons évalué les énergies d’interaction mises en jeu en utilisant différentes approximations (LDA, GGA et GGA+D). Nous avons étudié, ensuite, les propriétés électroniques de ces assemblages par le calcul des densités d’états projetées, de la différence de la densité de charge, du Laplacien de la charge ou de la fonction ELF. Afin de comparer nos résultats avec les résultats expérimentaux, nous avons effectué un calcul d’image STM en utilisant deux approches : l’approche de Tersoff-Hamann et l’approche multidiffusion proposée par le code bSKAN. Dans une dernière étape, nous avons étudié la recroissance de molécules de fullerène C60 sur le réseau auto-organisé de molécules de TBB déposées sur la surface Si(111) (√(3 ) x√3)R30° -B. Nous avons effectué une étude énergétique des molécules de C60 qui se déposent préférentiellement dans les nanopores de forme hexagonale en accord avec les expériences STM
My thesis presents the study of the adsorption of single molecules and molecular self-assembly, by numerical simulations at the atomic scale, on a boron doped silicon surface denoted Si(111)(√(3 ) x√3)R30°-B. After presenting the calculation methods and describing the surface model, this thesis is made of two parts: the first one is about the adsorption of single molecules and the second one is devoted to the formation of supramolecular network. In the first part, I studied the adsorption of single molecules on the silicon surface doped boron Si (111)(√(3 ) x√3)R30°-B. I have investigated the adsorption mechanisms of three different molecules: a molecule of pyridyl-azobenzene, a molecule of the family of porphyrin (Cu-TBBP) and two molecules which belong to the family of phtalocyanine (H2Pc and CuPc). For every molecule, I conducted energetic, structural and electronic studies. In most of the cases, I completed this work by calculating STM images in order to compare with experimental results. The second part of this thesis deals with the study of self assembly of organic molecules on the surface of Si(111)(√(3 ) x√3)R30°-B. Molecular self assembly is a technique which allows the formation of highly organized architectures at the atomic scale. I have studied three different molecules forming self assembly on the surface of Si (111)(√(3 ) x√3)R30°-B : 1,3,5-tri(4-bromophenyl benzene) denoted TBB, 1,3,5-tri(4-iodophenyle benzene) denoted TIB et 1,3,5-triphenylbenzene denoted THB. As the formation of a self organized network is a result of equilibrium between molecule-molecule interaction and molecule-substrate one, I have evaluated the interaction energies by using different approximations (LDA, GGA and GGA+D). Then, I have studied the electronic properties of these assemblies by calculating the projected density of states, the charge difference and the Laplacien of the charge or the ELF function (Electronic Localization Function). In order to compare our results with experimental ones, STM images calculations were performed by using two different approaches: the approach of Tersoff-Hamann and the multi-scattering approach proposed by bSKAN code. Finally, I have studied the growth of C60 molecules on the self organized network formed by the TBB molecules deposited on the Si (111)(√(3 ) x√3)R30°-B surface. The energetic study shows that C60 molecules are adsorbed preferentially in the hexagonal nanopores in agreement with the STM observations

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Robinson, Michael C. „A study of the diffusion of Pb on Au(111) using scanning tunneling microscopy (STM), with a comparison to embedded atom method (EAM) and surface embedded atom method (SEAM) simulations“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ52846.pdf.

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Laird, Rob. „Sim City : the simulation of ideology /“. Title page, table of contents and introduction only, 2005. http://web4.library.adelaide.edu.au/theses/09AR/09arl188.pdf.

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Watcharasukarn, Montira. „Travel Adaptive Capacity Assessment Simulation (TACA Sim)“. Thesis, University of Canterbury. Mechanical Engineering, 2010. http://hdl.handle.net/10092/5119.

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More than 95% of fuel used for personal transportation is petroleum-based (Environment and Development Division (EDD), 2005). The peak and decline of world oil production is producing price and uncertainty pressures that may cause significant travel behaviour change in the future. Current travel behaviour has developed during conditions of low cost fuel and government investment in private vehicle mobility. Current urban forms and land use have also been developed during a period of growth in vehicle travel demand. Research that explores the long term (permanent oil supply reduction period) implications of reduced fuel demand on private travel behaviour is needed. Local and national government investments in transport infrastructure and urban development will be used and require maintenance for decades. Research is needed to assess long-term mode choice and car travel demand as a function of urban form and demographic indicators. This type of travel behaviour adaptive potential should be relevant to transport planning decision making. Literature review shows that there are a few available long-term planning methods, models, or tools in transportation engineering for future oil depletion. Transportation engineers need information of how current travel demand patterns may change over the lifetime of infrastructure investments in response to oil supply depletion. Behaviour change data for long term future situations would be difficult to obtain using traditional survey methods because most people have never experienced oil depletion situations. This research proposes that immersing people into the situation of oil depletion through sharp price rise would be necessary to generate relevant behaviour change decisions. The thesis is that the long term behaviour change can be assessed by characterising current adaptive capacity. Adaptive capacity is defined in this thesis as the travel demand pattern with maximum fuel reduction without reducing participation in activities. The reasons why people might change travel demand to reduce fuel use is not part of the definition. This research also proposed that an immersive sim game environment could be used to prompt behaviour change decisions relating to fuel price shocks. Research into sim game surveys and travel behaviour surveys was used to inform the design of a Transport Adaptive Capacity Assessment (TACA) Sim survey tool. The TACA Sim survey was designed to assess capacity to adapt travel behaviour to reduce fuel use, and to characterise the potential for mode change. Participants experience the TACA Sim survey as a self assessment or transport energy audit. The survey provides a personal feel, focuses on the usual weekly activities, and provides feedback to participants about their fuel use and car dependence. Participants supply their normal travel activities over a week, and three weeks of sim play includes a steep fuel price rise while people are allowed to change their travel behaviour in response. The TACA Sim survey was evaluated through a case study of surveys of staff and students at the University of Canterbury. A second version of the TACA survey was developed that surveyed the one week of normal travel, but then probed adaptive capacity by asking a simple question after each travel activity was entered “Could you get to the activity another way?” The sim game travel adaptive capacity is compared with the available alternative adaptive behaviour for participants in a case study at the University of Canterbury. The results of the case study show that the participants responded well with the simulated situation. This reflects that the TACA Sim is successful in helping participants to perceive the situation of fuel price rise and think about their alternatives to car travel. Asking people “Could you get to the activity another way?” was found to effectively probe their adaptive capacity which agreed well with the virtual reality survey. The virtual reality survey yields more details of what people can do such as moving house, chaining trips, combining trips and buying a more efficient vehicle. The web-based TACA survey has been developed and deployed in two further research projects.

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Deniz, Ertan. „Dds Based Mil-std-1553b Data Bus Interface Simulation“. Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614852/index.pdf.

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This thesis describes distributed simulation of MIL-STD-1553B Serial Data Bus interface and protocol based on the Data Distribution Service (DDS) middleware standard. The data bus connects avionics system components and transports information among them in an aircraft. It is important for system designers to be able to evaluate and verify their component interfaces at the design phase. The 1553 serial data bus requires specialized hardware and wiring to operate, thus it is expensive and complex to verify component interfaces. Therefore modeling the bus on commonly available hardware and networking infrastructure is desirable for evaluation and verification of component interfaces. The DDS middleware provides publish-subscribe based communications with a number of QoS (Quality Of Service) attributes. DDS makes it easy to implement distributed systems by providing an abstraction layer over the networking interfaces of the operating systems. This thesis takes the advantage of the DDS middleware to implement a 1553 serial data bus simulation tool. In addition, the tool provides XML based interfaces and scenario definition capabilities, which enable easy and quick testing and validation of component interfaces. Verification of the tool was performed over a case study using a scenario based on the MIL-STD-1760 standard.

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Petersson, Jenny. „3D-simulation som avprovningsmetod : Inriktat mot tights för sportutövning“. Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-14789.

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Denna studie om 3D-avprovning för sport-tights är en kandidatuppsats i designteknik. Företaget studien är utvecklad för jobbar med sportkläder och har i dagsläget ett intresse av att använda sig av 3D-simulering som avprovningsmetod. Vid utveckling av tights anpassade för träning skickas i dagsläget flera prototyper mellan företaget och leverantören innan produkten kan börja produceras. För att framtagningen av produkten ska ta mindre tid, bli mer miljövänlig och kosta mindre undersöker studien om 3D-avprovning är applicerbart i företagets process för produktframtagning. För att kontrollera validiteten i 3D-avprovning av tights gjordes tre undersökningar med syfte att få förståelse för skillnaderna mellan en fysisk och en virtuell avprovning. Undersökningarna fokuserar på grundstorleken Small och den största storleken Extra Large. Studien visar att 3D-simulering till viss del är en fungerande avprovningsmetod för tights när det kommer till att kontroll av designen. För att kontrollera plaggens rörelsevidd är metoden i denna studie ej fungerande. Studiens deltagare visade en positiv inställning till att använda sig av metoden i deras produktframtagningsprocess men då främst som ett komplement till fysiska avprovningar tidigt i designprocessen.
This study on 3D fitting for sports tights is a Final Bachelor Degree Thesis in design technology. The company the study is developed for works with sportswear and currently has an interest in using 3D simulation as a fitting method. For the development of tights adapted for training, several prototypes are currently being sent between the company and the supplier before the product can start to be produced. In order for the production of the product to take less time, become more environmentally friendly and cost less, the study investigate if 3D fitting is applicable in the company's product development process. To check the validity of 3D fitting of tights, three surveys were made with the purpose of understanding the differences between physical and virtual testing. The studies focus on the base size Small and the largest size Extra Large. The study shows that 3D simulation is partially functional testing method for tights when it comes to controlling the design. In order to control the ease, the method in this study is not working. The participants of the study showed a positive attitude to use the method in their product development process, but mainly as a complement to physical fittings early in the design process.

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Holt, Jennifer A. „THz Systems: Spectroscopy and Simulation“. The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1417536443.

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Bücher zum Thema "STM simulations"

McClean, Sean. Show me SAM: Computerised educational simulation-game. [S.l: The Author], 1997.

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DeMaria, Rusel. Sim City 3000: Prima's official strategy guide. Rocklin, Calif: Prima Pub., 1999.

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Greg, Kramer. Sim City 3000 unlimited: Prima's official strategy guide. Roseville, Calif: Prima Pub., 2000.

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Paul, Gilman, und National Renewable Energy Laboratory (U.S.), Hrsg. Technical manual for the SAM Physical Trough model. Golden, Colo: National Renewable Energy Laboratory, 2011.

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R, Taylor Tony, und Villar Julie N, Hrsg. Elements of STIL: Principles and applications of IEEE Std. 1450. Boston: Kluwer Academic Publishers, 2003.

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Egon, Marx, und National Institute of Standards and Technology (U.S.), Hrsg. User's manual for the program MONSEL-1: Monte Carlo simulation of SEM signals for linewidth metrology. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1994.

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EASTMAN. Official Guide to Command & Conquer. Indianapolis, USA: BradyGames, 1995.

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Maston, Gregory A. Elements of STIL: Principles and applications of IEEE Std. 1450. Boston, MA: Kluwer Academic Publishers, 2004.

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Tauber, Daniel A. SimCity 2000 strategies and secrets. 2. Aufl. San Francisco: Sybex, 1995.

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Buchteile zum Thema "STM simulations"

Kepenekian, M., R. Robles, R. Korytár und N. Lorente. „Simulations of Constant Current STM Images of Open-Shell Systems“. In Imaging and Manipulating Molecular Orbitals, 117–36. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38809-5_10.

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Könözsy, László. „Two-Dimensional Simulations with an Anisotropic Hybrid k-$$\omega $$ SST/STM Approach“. In A New Hypothesis on the Anisotropic Reynolds Stress Tensor for Turbulent Flows, 215–357. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60603-9_4.

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Könözsy, László. „Three-Dimensional Simulations with an Anisotropic Hybrid k-$$\omega $$ SST/STM Approach“. In A New Hypothesis on the Anisotropic Reynolds Stress Tensor for Turbulent Flows, 359–404. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60603-9_5.

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Lawler, Gregory, und Lester Coyle. „Other simulations“. In The Student Mathematical Library, 75–80. Providence, Rhode Island: American Mathematical Society, 1999. http://dx.doi.org/10.1090/stml/002/12.

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Lawler, Gregory, und Lester Coyle. „Random walk simulations“. In The Student Mathematical Library, 69–74. Providence, Rhode Island: American Mathematical Society, 1999. http://dx.doi.org/10.1090/stml/002/11.

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Lawler, Gregory, und Lester Coyle. „Simulations in finance“. In The Student Mathematical Library, 81–84. Providence, Rhode Island: American Mathematical Society, 1999. http://dx.doi.org/10.1090/stml/002/13.

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Witthaut, Markus, und Bernd Hellingrath. „Simulation von SCM-Strategien“. In Große Netze der Logistik, 59–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-71048-6_3.

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van Rosmalen, Peter. „SAM, Simulation And Multimedia“. In Design and Production of Multimedia and Simulation-based Learning Material, 167–87. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0942-0_9.

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Stanley, Todd. „Use Computer Models or Simulations“. In 10 Performance-Based STEM Projects, 105–14. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003232520-10.

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Stanley, Todd. „Use Computer Models or Simulations“. In 10 Performance-Based STEM Projects, 109–16. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003232513-10.

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Konferenzberichte zum Thema "STM simulations"

Byun, Ki Ryang. „Atomic Scale Simulations of Silicon Nanotubes under Axial Compression: AFM Application“. In SCANNING TUNNELING MICROSCOPY/SPECTROSCOPY AND RELATED TECHNIQUES: 12th International Conference STM'03. AIP, 2003. http://dx.doi.org/10.1063/1.1639752.

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Sando, Kosuke, Ryota Wada, Jeremy Rohmer, Sophie Lecacheux und Philip Jonathan. „Estimating Joint Extremes of Significant Wave Height and Wind Speed for Tropical Cyclones“. In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-79888.

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Abstract We provide a computationally-efficient scheme for the estimation of joint extremes of significant wave height (Hs) and wind speed (U) for tropical cyclones. The method incorporates the simple spatial extremes method (STM-E) of Wada et al., 2019 (for spatial extremes of each of Hs and U) and the conditional extremes model of Heffernan and Tawn, 2004 (for conditional modeling of Hs given extreme U and U given extreme Hs). We demonstrate the methodology in application to data generated from hindcast simulations and track shifting of past tropical cyclones in the neighborhood of Réunion island in the Indian Ocean. Following the STM-E approach, spatio-temporal maxima (STM) and exposures (E) of both Hs and U are extracted for each tropical cyclone event. Marginal extreme value distributions are then estimated independently for the STM samples of Hs and U, providing a means for marginal extrapolation to long return periods. Exposure data are used to estimate densities for the spatial distribution of Hs and U. The conditional extremes model is then used to characterize the joint structure of STM for Hs and U, conditional on one of those variables being extreme. The estimated joint return values for Hs and U are validated by comparison with the original data.

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Ma, Boyang, Adi Goldner und Michael Krüger. „Ultrafast Scanning Tunneling Microscopy“. In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/up.2022.th4a.30.

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We integrate a conventional scanning tunneling microscope (STM) with an ultrafast carrier-envelope-phase stable laser. Simulations show that the observed laser-driven tunneling current consists of single attosecond bursts. This innovation promises simultaneous ångström and attosecond observations.

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Mohseni, Seyed Mohammad Javad, und Arndt Goldack. „Verification of reinforced concrete D-regions designed with strut-and- tie models by nonlinear FE-Methods“. In IABSE Congress, New Delhi 2023: Engineering for Sustainable Development. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2023. http://dx.doi.org/10.2749/newdelhi.2023.1424.

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<p>The design of structural discontinuities (D-Regions) of reinforced concrete (RC) structures, such as openings and dapped ends, put practical engineers in a challenging situation. Few skilled enough, develop Strut-and-Tie Models (STM) for the design. ln this paper, the ultimate load capacities of a deep beam designed with STM are checked and examined with the help of nonlinear FEM simulations. These were performed with two different material models: The Concrete-Damaged- Plasticity (CDPM) in Abaqus and the Coupled-Damage-Plasticity-Microplane (MPM) in Ansys. This paper provides an overview of all the relevant aspects regarding modelling the material nonlinearities and provides an example on how to use both material models. The conclusions of this work shall pave the way for further studies, especially for D-Regions with non-metallic reinforcement such as Glass Fibre Reinforced Polymer (GFRP) rebars.</p>

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Tsukamoto, S., G. R. Bell, A. Ishii und Y. Arakawa. „InAs wetting layer and quantum dots on GaAs(001) surface studied by in situ STM placed inside MBE growth chamber and kMC simulations based on first-principles calculations“. In PHYSICS OF SEMICONDUCTORS: 28th International Conference on the Physics of Semiconductors - ICPS 2006. AIP, 2007. http://dx.doi.org/10.1063/1.2729790.

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Fukuda, Koichi, Masayasu Nishizawa, Tetsuya Tada, Leonid Bolotov, Kaina Suzuki, Shigeo Sato, Hiroshi Arimoto und Toshihiko Kanayama. „Simulation of light-illuminated STM measurements“. In 2014 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD). IEEE, 2014. http://dx.doi.org/10.1109/sispad.2014.6931580.

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Karis, T. E., M. E. Best, J. A. Logan, J. R. Lyerla, R. T. Lynch und R. P. McCormack. „Tracking Servo Signal Simulation from STM Surface Profiles“. In Optical Data Storage. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/ods.1991.wb6.

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Certain optical data systems rely upon the ability of the laser to accurately track along grooves in the substrate. The topography and physical properties of the substrate, laser beam characteristics (wavelength, spot size), and physical optics of the optical head all play a role in determining whether tracking is possible on a given optical disk. The effects of each of these variables can be found by modelling the disk as a phase surface which modulates the phase of the incident laser light. Scalar diffraction thcory[l,2] can be used to predict the reflected light intensity as a function of position across the disk for a given system. It is then possible to predict the servo signals which are used for tracking. The primary substrate parameters which affect these tracking signals are the groove depth, the relative widths of the groove and land (duty cycle), the track pitch, the refractive index, and the groove topography. All of these disk properties, excluding the refractive index, are found using Scanning Tunneling Microscopy (STM)[3]. This gives a detailed three dimensional surface profile for the disk which is then used in the theoretical calculation of the tracking servo signals. These calculated values are compared to actual experimental data obtained using an optical disk tester. Disks were measured which have varying depth and varying track pitch at fixed depth.

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Grella, Luca, Matthew Marcus, Gian Lorusso und David L. Adler. „SEM voltage contrast simulations“. In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, herausgegeben von Eric Munro. SPIE, 1999. http://dx.doi.org/10.1117/12.370123.

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Miao, Wansheng, Yue Zhou, Bingfei Li, Bobo Feng und Huanchao Du. „XMI-based conversion of SysML-STM models to C++ code“. In ICCMS 2024: 2024 The 16th International Conference on Computer Modeling and Simulation, 15–19. New York, NY, USA: ACM, 2024. http://dx.doi.org/10.1145/3686812.3686815.

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Kapitan, Vitalii, Konstantin Nefedev und Alexey Peretyatko. „Supercomputer data processing and simulation of MFM and STM experiments“. In 2014 Tenth International Vacuum Electron Sources Conference (IVESC). IEEE, 2014. http://dx.doi.org/10.1109/ivesc.2014.6892003.

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Berichte der Organisationen zum Thema "STM simulations"

W. Park, J. Breslau, J. Chen, G.Y. Fu, S.C. Jardin, S. Klasky, J. Menard et al. Nonlinear Simulation Studies of Tokamaks and STs. Office of Scientific and Technical Information (OSTI), Juli 2003. http://dx.doi.org/10.2172/814698.

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Bekar, Kursat B., Thomas Martin Miller, Bruce W. Patton und Charles F. Weber. Rapid Evaluation of Particle Properties using Inverse SEM Simulations. Office of Scientific and Technical Information (OSTI), Januar 2016. http://dx.doi.org/10.2172/1238023.

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Hua, Thanh, Ling Zou und Rui Hu. Simulations of the High Temperature Test Facility using SAM. Office of Scientific and Technical Information (OSTI), August 2020. http://dx.doi.org/10.2172/1825879.

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Zou, Ling, Dan O'Grady und Rui Hu. Enabling Parallel Execution of System-level Simulations in SAM. Office of Scientific and Technical Information (OSTI), November 2022. http://dx.doi.org/10.2172/1898043.

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Martin, S., Larry Daggett, Morgan Johnston, Chris Hewlett, Kiara Pazan, Mario Sanchez, Dennis Webb, Mary Allison und George Burkley. Houston Ship Channel Expansion Improvement Project – Navigation Channel Improvement Study : ship simulation results. Coastal and Hydraulics Laboratory (U.S.), November 2021. http://dx.doi.org/10.21079/11681/42342.

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In 2020, the US Army Engineer Research and Development Center (ERDC), Coastal and Hydraulics Laboratory, provided technical oversight during a navigation study to assist the Galveston District evaluation of different channel widening alternatives for larger ships transiting the Houston Ship Channel (HSC), Texas. The widening proposals encompassed several areas of the HSC including the Bay Section, the Bayport Ship Channel, Barbours Cut Channel, and the Bayou Section. The study was performed at the San Jacinto College Maritime Technology and Training Center (SJCMTTC) Ship/Tug Simulator (STS) Facility in La Porte, TX. The SJCMTTC STS is a real-time simulator; therefore, events on the simulator happen at the same time rate as real life. A variety of environmental forces act upon the ship during the simulation transit. These include currents, wind, waves, bathymetry, and ship-to-ship interaction. Online simulations of the project were conducted at SJCMTTC over a 3-week period – May through June 2020. Several mariners including Houston Pilots and G&H tugboat Captains participated in the testing and validation exercises. ERDC oversight was performed remotely because of the COVID-19 pandemic. Results in the form of engineering observations, track plots, and pilot interviews were reviewed to develop final conclusions and recommendations regarding the final design.

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Pazan, Kiara, Natalie Memarsadeghi und Jacob Hodges. Lock and Dam 25, Upper Mississippi River Navigation Study : ship-simulation results. Engineer Research and Development Center (U.S.), Juni 2024. http://dx.doi.org/10.21079/11681/48650.

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The US Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory (CHL), used the Ship/Tow Simulator to evaluate navigational conditions for the US Army Corps of Engineers, St. Louis District (MVS), proposed 1,200 feet (ft) lock chamber at Lock and Dam 25 in a tow simulation study. The study considers the impacts to navigation throughout construction sequences of the proposed 1,200 ft lock chamber and the final completed project. Testing occurred at CHL in October–November 2022 with five industry tow pilots. A total of 47 unique test conditions for a total of 187 ship-simulation exercises were evaluated. All final project simulations indicated that the design is feasible. When testing the construction scenarios of the design, it was evident that a tug-assist boat would be necessary for entering the 600 ft lock for both approaches. Results found that the intermediate wall construction should begin at the existing structure and progress downstream. Entering the 600 ft lock from the pool side was additionally completed successfully; however, modifications are needed for entering from the tailwater side. Ultimately, the results of this study will aid MVS in the design plan and decision-making regarding the proposed lock.

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Santander, Horacio, und Martin Cicowiez. Construcción de una Matriz de Contabilidad Social para Paraguay para el Año 2009. Inter-American Development Bank, November 2015. http://dx.doi.org/10.18235/0010078.

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En este documento se describe el procedimiento seguido para la construcción de una matriz de contabilidad social (SAM; del inglés Social Accounting Matrix) para Paraguay para el año 2009. El documento describe con detalle el trabajo realizado y documenta los pasos seguidos en la construcción de la SAM, lo cual puede servir de base para futuras actualizaciones de la SAM elaborada. La SAM que se describe en este trabajo fue utilizada para calibrar el modelo MAMS (Maquette for MDG Simulations), un modelo de equilibrio general computable desarrollado en el Banco Mundial para evaluar distintas cuestiones relacionadas con el desarrollo económico.

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Ervin, Kelly, Karl Smink, Bryan Vu und Jonathan Boone. Ship Simulator of the Future in virtual reality. Engineer Research and Development Center (U.S.), September 2022. http://dx.doi.org/10.21079/11681/45502.

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The Army’s modernization priorities include the development of augmented reality and virtual reality (AR/VR) simulations for enabling the regiment and increasing soldier readiness. The use of AR/VR technology at the U.S. Army Engineer Research and Development Center (ERDC) is also growing in the realm of military and civil works program missions. The ERDC Coastal and Hydraulics Laboratory (CHL) has developed a ship simulator to evaluate bay channels across the world; however, the current simulator has little to no physical realism in nearshore coastal regions (Figure 1). Thus, the ERDC team is researching opportunities to advance ship simulation to deliver the Ship Simulator of the Future (SSoF). The SSoF will be equipped with a VR mode and will more accurately resolve nearshore wave phenomena by ingesting precalculated output from a Boussinesq-type wave model. This initial prototype of the SSoF application is intended for research and development purposes; however, the technologies employed will be applicable to other disciplines and project scopes, including the Synthetic Training Environment (STE) and ship and coastal structure design in future versions.

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Mitchell, R. STL (Simulation Technology Laboratory) Global Control System, technical reference. Office of Scientific and Technical Information (OSTI), Januar 1990. http://dx.doi.org/10.2172/6812798.

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Jones, Scott A., William Kamery, Arnold Barry Baker, Thomas E. Drennen, Andrew E. Lutz und Jennifer Elizabeth Rosthal. The Hydrogen Futures Simulation Model (H[2]Sim) technical description. Office of Scientific and Technical Information (OSTI), Oktober 2004. http://dx.doi.org/10.2172/919630.

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