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Kınay, Gökçe Turan Gürsoy. "Construction and control of a desktop earthquake simulator/." [s.l.]: [s.n.], 2006. http://library.iyte.edu.tr/tezler/master/insaatmuh/T000542.pdf.
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Sherman, Kim L. "The design and construction of a hang glider flight simulator /." Online version of thesis, 1992. http://hdl.handle.net/1850/11260.
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Nordström, Lisa. "Construction of a Simulator for the Siemens Gas Turbine SGT-600." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4996.
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This thesis covers the development of a simulator for the Siemens Gas Tur-bine SGT-600. An explanation on how a gas turbine works is also given, as well as the principles behind the control system used by Siemens to control the turbine.
For Siemens Industrial Turbomachinery to be able to test its control sys-tem before delivering a gas turbine to the customer, a simulator is needed. The control system needs to be adjusted for every unique gas turbine, since there are several options for the customer to choose between when ordering the turbine. A control system standard is under development, which also needs to be tested in a simulator.
The framework for the simulator, i.e. the hardware and software that form the simulator system, was predefined to suit this specific purpose. The Siemens software SIMIT is used for developing the model. SIMIT is a real time simulation tool where models are constructed using blocks, similar to MATLAB Simulink.
A gas turbine is basically a heat engine that produces mechanical energy or electricity. The main task of the control system is to control the fuel flow to the combustion chamber and by that keeping the machine at desired speed.
The gas turbine model was developed using measurement data from a site in Hungary, where a gas turbine of the type SGT-600 is in service. The model is based on simplified relations between the signals. By analyzing measurement data and learning about the functionality of a gas turbine it was found out that the speed of the gas generator affected most other sig-nals, like temperatures and pressures. The gas generator speed was found to be dependent on the heat flow, which is determined by the openings of the gas control valves.
As a result of this thesis a working simulator for the gas turbine SGT-600 has been developed. The simulator can be used for testing the control sys-tem standard and for testing the control system when adapting it to a spe-cific delivery. It is also suitable for educational purposes, for example to instruct customers.
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Olsen, Øyvind. "Construction of a transport kernel for an ensemble Monte Carlo simulator." Thesis, Norwegian University of Science and Technology, Department of Physics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-6350.
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Licon, Luis Roberto. "Automated Quasi-static In Vitro Knee Joint Simulator: Construction and Validation." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38603.
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Anterior cruciate ligaments (ACL) are among the most common reported ligament injuries in athletes. This injury has been linked to changes in joint stability, neuromuscular activity and contact mechanics. In vitro simulators have proven to provide valuable insights on the potential effects of muscle activity on joint stability. The University of Ottawa Knee Simulate (UOKS) is a mechanical load driven quasi-static apparatus that provides the framework to explore pressure changes in knee compartments and the resultant kinematics in response to six individual muscle loads applied around an unconstrained joint. The main objective of the present work was to develop an automated loading mechanism for the UOKS. Furthermore, the secondary objective was to evaluate the accuracy, precision, reliability and validity of the newly automated system.
Six transmission units were designed, built and tested as part of the development of the automated mechanism adapted to the UOKS. Load cells were used to obtain real time feedback of the load created by the transmission units. A software controller was programmed using LABVIEW to control these transmissions as a graphic user interface (GUI). Each transmission was tested independently and compared to an external master load cell. Furthermore, four cadaveric knee joints were mounted and suspended inside the UOKS for experimentation. Seven different loading conditions were tested with the ACL intact and after the ACL was severed. Pressure and kinematic data were recorded to correlate the changes in these variables due to changes in loading conditions simulated by the UOKS.
The controlled loading experiment of the automated mechanism showed the accuracy of the controller to be within +/-1N, and multiple trials showed the system’s capability to produce loads. Additionally, the results showed the controller to have an ICC of 0.99 between the load produced and the target load. The comparison between feedback load cells and the master load cell displayed unique results regarding each transmission and the loads being applied. The results showed overestimations and underestimations with unique load difference trends for each transmission. Nevertheless, the relative difference measured by the master load cell was below 10% in all the transmissions.
This study demonstrated that the controller was accurate and reliable when producing loads. On the other hand, the results of the integration analysis showed the presence of losses in the system when transmitting the loads from the actuators to the front of the UOKS. These losses were different for each transmission, likely due to the independence of each pulley system. Nevertheless, the automated loading mechanism proved to be a valid replacement for the original static loading mechanism previously used by the UOKS and is capable of reliably simulating six independent loading conditions.
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Fjeldheim, Ek Dan, Anes Mulisic, and Filip Syta. "Entry barriers on the training simulator market for construction vehicles in Europe." Thesis, Linnéuniversitetet, Ekonomihögskolan, ELNU, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-11240.
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The research question, which we will answer in this paper, is following: What are the four entry barriers that are most difficult to overcome when entering the training simulator market for construction vehicles in Europe? To answer this research question we performed a study on nine companies in the training simulator market for construction vehicles and asked them to rank 25 entry barriers on a Likert scale in order of importance. The results of our research study show us the barriers of importance. The top four barriers are: R&D expenses in entering a market, access to distribution channels, selling expenses and costumer loyalty advantage held by incumbents. There are several factors affecting the barriers importance on the market. Product type, market characteristics’ and the competitors are some of the most important factors. These factors make the market unique and difficult to generalize. The specific combination of factors creates entry barriers that are unique to the specific market.
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Onen, O. Murat(Oguzhan Murat). "Construction of a superconducting circuit simulator and its applications in cryogenic computing." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/121740.
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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019Cataloged from PDF version of thesis.
Includes bibliographical references (pages 97-100).
In this work, I first construct a unified simulation platform, where superconducting electronics can be designed and optimized with high performance and accuracy. For this purpose, I first select numerical simulation methods that can deal with the highly non-linear characteristics of the superconducting devices. I validate the simulated responses with experimental data on device and circuit level examples. Following the implementation of the simulator, I use this framework to analyze existing superconducting nanowire based technologies, and optimize them for wider operation regimes and higher performance metrics. I use nanofabrication processes to realize these devices and conduct liquid helium immersion measurements to characterize them experimentally. Optimized devices show superior characteristics that demonstrate the predictive capabilities of this simulator. Finally, I use this simulator to design a superconducting nanowire based deep neural network training accelerator. I design, implement, and characterize a unit cell for this application. These local processors have significant device-level advantages over the readily available non-volatile memory technologies in realizing mixed-signal architectures. The devices produced throughout this work have immediate and near-term applications, proving the merit of having a high-performance simulator.
by O. Murat Onen.
S.M.
S.M. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
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Lichter, Harry (Harry J. ). "Design and construction of a human powered vehicle seating simulator for diagnostic testing." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36734.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.Includes bibliographical references (leaf 24).
A seating simulator was built to test the influence of various seating positions on human cycling power output. The simulator measures a rider's physical stress required to produce a certain power output. A heart rate monitor is used to find the rider's physical stress level. The theory is that the best shaped seat will allow the rider to pedal most efficiently. The seat of the simulator can easily be changed by connecting the seat's support strings to a square grid of holes. Mechanical power flows from the simulator's bike pedals through a chain drive to an electric motor. Electrical power flows from the electric motor through a rectifier to a variable bank of resistors. There were issues which came up involving the bike parts used and the dynamics of the chain drive system. The worst problem was that the supports would flex causing the chain to slacken and resonate under the changing forces of the pedaling motion. First a steel pipe was added to make the system more rigid. Then a sliding copper derailleur was used to allow the chain to stay on up to 213 watts. Finally the copper derailleur was replaced with a bike's derailleur which allows the simulator to operate in excess of 450 watts. Initial tests of several different seat configurations were completed with notable influence on the heart rate of the rider.
by Harry Lichter.
S.B.
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Kebede, Tadesse Tafesse. "Development and Implementation of Filter Algorithms and Controllers to a Construction Machine Simulator." Thesis, KTH, Geodesi och satellitpositionering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199691.
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Different geodetic techniques can be integrated in construction processes to have effective, timesaving and cost minimizing construction through geometric control and guidance of theconstruction machines on the designed alignment. This can be achieved by integrating atachymeter as kinematic positioning sensor. The institute of application of geodesy toengineering (IAGB) of University of Stuttgart has developed a modular position guidance toolbox(a construction machine simulator) that comprises a model truck of scale 1:14, of Leica TPS1201tachymeter, remote controller and a computer.Tachymeters can work as kinematic measuring devices by integrating them to a constructionprocess, in real time, using automatic closed-loop control systems with feedbacks. The geometricdeviation between the measured and given trajectories can be minimized to some optimized limitusing different types of controllers. With P-I-D controllers a better accuracy can be achieved,and with integration of Kalman filter to the control system the controller quality can beimproved.It is also possible to account for the dynamic effect on the model truck at higher velocities;however, the accuracy is very small due to some practical working limitations of tachymeter(such as low scanning rate and dead time) as kinematic position sensor at higher velocities.
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Yang, Wenwen. "Long-term Leachate Characterization and Hydrogen Sulfide Generation from a Construction and Demolition Simulator." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439309375.
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Hoske, Petra, Günter Kunze, Kai Bürkle, Martin Schmauder, Mark Brütting, and Christian Böser. "Interaktiver Simulator für mobile Arbeitsmaschinen – Virtuelle Prototypen im Einsatzkontext erleben." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-228234.
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Beim Einsatz mobiler Arbeitsmaschinen bestimmt der Maschinenführer die Arbeitsleistung und -sicherheit wesentlich mit. Er muss in die Lage versetzt werden, die Maschine ohne Gefahr für sich und andere zu steuern und ihr Leistungspotential voll zu nutzen. Deshalb sind Maschinenführer als reale oder virtuelle Bediener frühzeitig in die Maschinenentwicklung mit einzubeziehen.
In einem global härter werdenden Markt reichen den Herstellern empirische Untersuchungen allein nicht mehr aus. Die Zusammenhänge im System Bediener-Maschine-Prozess sollen möglichst objektiv und reproduzierbar erfasst werden. Das kann aufwändige experimentelle Untersuchungen erfordern. Der Bau realer Testmaschinen und ihre Ausstattung mit Messtechnik kosten viel Zeit und Geld. Reale Einsatzversuche sind oft nicht unter gleich bleibenden Bedingungen durchführbar, was die Auswertung erschwert. Hingegen bieten Werkzeuge der Simulation und Virtuellen Realität eine effiziente Möglichkeit, Maschinenführer in frühen Phasen der Produktentwicklung mit einzubeziehen.
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Hoske, Petra, Günter Kunze, Kai Bürkle, Martin Schmauder, Mark Brütting, and Christian Böser. "Interaktiver Simulator für mobile Arbeitsmaschinen – Virtuelle Prototypen im Einsatzkontext erleben." TUDpress - Verlag der Wissenschaften GmbH, 2012. https://tud.qucosa.de/id/qucosa%3A30502.
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Beim Einsatz mobiler Arbeitsmaschinen bestimmt der Maschinenführer die Arbeitsleistung und -sicherheit wesentlich mit. Er muss in die Lage versetzt werden, die Maschine ohne Gefahr für sich und andere zu steuern und ihr Leistungspotential voll zu nutzen. Deshalb sind Maschinenführer als reale oder virtuelle Bediener frühzeitig in die Maschinenentwicklung mit einzubeziehen.
In einem global härter werdenden Markt reichen den Herstellern empirische Untersuchungen allein nicht mehr aus. Die Zusammenhänge im System Bediener-Maschine-Prozess sollen möglichst objektiv und reproduzierbar erfasst werden. Das kann aufwändige experimentelle Untersuchungen erfordern. Der Bau realer Testmaschinen und ihre Ausstattung mit Messtechnik kosten viel Zeit und Geld. Reale Einsatzversuche sind oft nicht unter gleich bleibenden Bedingungen durchführbar, was die Auswertung erschwert. Hingegen bieten Werkzeuge der Simulation und Virtuellen Realität eine effiziente Möglichkeit, Maschinenführer in frühen Phasen der Produktentwicklung mit einzubeziehen.
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Källström, Reidar. "Construction, Validation and Application of a Virtual Reality Simulator for the Training of Transurethral Resection of the Prostate." Doctoral thesis, Linköpings universitet, Kirurgi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54466.
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The fundamental of surgical training is the traditional apprenticeship method introduced by William Halsted which has been used for the last 100 years. It is based on learning in the operating room (OR) where the resident is guided by an experienced surgeon and gradually and methodically exposed to surgery. The continuous development of surgical methods together with the growing awareness of medical errors and ethical considerations have made the Halsted method outdated and there is an obvious need to be able to learn the skills of surgery without risking patient safety. New methods such as laparoscopy and endoscopy demand specific skills and abilities that may not be met by everyone. At the same time, the physical limitations of these new methods have made it possible to construct virtual reality (VR) simulators to practise and learn the skills necessary. This study is about the construction and evaluation of a VR-simulator for the training of transurethral resection of the prostate (TURP). It also concerns the specific abilities needed to become a good surgeon. A simulator for training TURP was developed after a face validity study where 17 experienced urologists gave their opinion of the specific content necessary for the training of this procedure. After a content validity study by nine experienced urologists and application of necessary improvements, a group of 11 medical students and nine experienced urologists performed a construct validity test where the urologists showed significantly higher levels of both skill and effectiveness compared to the inexperienced students when performing a simulated TURP procedure. The students showed a positive learning curve, but did not reach the levels of the urologists. The results of the experienced urologists were used as the minimal criterion level when 24 urology residents practised the procedure. Training took place while on a course on benign enlargement of the prostate and its treatment options, with emphasis on the “gold standard” treatment – TURP. During the course they performed three guided and video-taped TURP-procedures each on selected patients. Between two of the procedures they performed criterion-based training in the simulator. This VR-to-OR study showed improvement in operative skills with the same patient outcome as in the normal clinical situation. It also showed that simulator training improved their skills even more. During their time on the course their personality traits (TCI) and cognitive abilities (Rey complex figure and recognition trial, tower of London, WAIS-III) were tested. The results showed that a better learning curve in the OR was associated with a better simulator learning curve and a good visuospatial memory. The associated personality traits were high levels of goal directedness, impulse control, responsibility, anticipation of harmful events and a balanced attachment style. In conclusion, we have demonstrated that it was technically possible to construct a useful simulator for the training of TURP (PelvicVision®) which may now be considered clinically validated for this purpose. Novice training and performance in the simulator improves the learning curve and predicts the resident’s performance in the OR. The results support the implementation of validated simulation technology in a criterion-based training curriculum for residents. Furthermore, the results showed preliminary data on personality traits and visuospatial abilities that are important for learning a complex surgical procedure.
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Ale, Anil Kumar. "Comparison and Evaluation of Existing Analog Circuit Simulator using Sigma-Delta Modulator." Thesis, University of North Texas, 2006. https://digital.library.unt.edu/ark:/67531/metadc5422/.
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In the world of VLSI (very large scale integration) technology, there are many different types of circuit simulators that are used to design and predict the circuit behavior before actual fabrication of the circuit. In this thesis, I compared and evaluated existing circuit simulators by considering standard benchmark circuits. The circuit simulators which I evaluated and explored are Ngspice, Tclspice, Winspice (open source) and Spectre® (commercial). I also tested standard benchmarks using these circuit simulators and compared their outputs. The simulators are evaluated using design metrics in order to quantify their performance and identify efficient circuit simulators. In addition, I designed a sigma-delta modulator and its individual components using the analog behavioral language Verilog-A. Initially, I performed simulations of individual components of the sigma-delta modulator and later of the whole system. Finally, CMOS (complementary metal-oxide semiconductor) transistor-level circuits were designed for the differential amplifier, operational amplifier and comparator of the modulator.
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Nugent, Steven Paul. "A Second Generation Generic Systems Simulator (GENESYS) for a Gigascale System-on-a-Chip (SoC)." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6885.
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Future opportunities for gigascale integration will be governed by a hierarchy of theoretical and practical limits that can be codified as follows: fundamental, material, device, circuit, and system. An exponential increase in on-chip integration is driving System-on-Chip (SoC) methodologies as a dominant design solution for gigascale ICs. Therefore, a second generation generic systems simulator (GENESYS) is developed to address a need for rapid assessment of technology/architecture tradeoffs for multi-billion transistor SoCs while maintaining the depth of core modeling codified in the hierarchy of limits. A newly developed system methodology incorporates a hiearchical block-based model, a dual interconnect distribution for both local and global interconnects, a generic on-chip bus model, and cell placement algorithms. A comparison of simulation results for five commercial SoC implementations shows increased accuracy in predicting die size, clock frequency, and total power dissipation. ITRS projections for future technology requirments are applied with results indicating that increasing static power dissipation is a key impediment to making continued improvements in chip performance. Additionally, simulations of a generic chip multi-processor architecture utilizing several interconnect schemes shows that the most promising candidate for the future of on-chip global interconnect networks will be hierarchical bus structures providing a high degree of connectivity while maintaining high operating frequencies.
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Vasquez, Bullon Hugo Salvador. "Construction d'une nouvelle expérience pour l'étude de gaz quantiques dégénérés des réseaux optiques, et étude d'un système d'imagerie super-résolution." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0035/document.
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Depuis quelques temps, les physiciens théoriciens de la matière condensée sont confrontés à un problème majeur : la puissance de calcul nécessaire pour simuler numériquement et étudier certains systèmes à N corps est insuffisante. Comme le contrôle et l’utilisation des systèmes d’atomes ultra-froids se sont développés de manière importante,principalement durant les deux dernières décennies, nous sommes peut-être en mesure d eproposer une solution alternative : utiliser des atomes ultra-froids piégés dans des réseaux optiques en tant que simulateur quantique. En effet, la physique des électrons se déplaçant sur la structure cristalline d’un solide, ainsi que celle des atomes piégés dans des réseaux optiques, sont toutes les deux décrites par le même modèle de Fermi-Hubbard, qui est une présentation simplifiée du comportement des fermions sur un réseau périodique. Les simulateurs quantiques peuvent donc simuler des propriétés électriques des matériaux, telle sque la conductivité ou le comportement isolant, et potentiellement aussi des propriété smagnétiques telles que l’ordre antiferromagnétique.L’expérience AUFRONS, sur laquelle j’ai travaillé pendant mon doctorat, a pour but d’étudie rla physique des fermions fortement corrélés, avec un simulateur quantique basé sur l’utilisation d’atomes ultra-froids de rubidium 87 et de potassium 40, piégés dans le potentiel nanostructuré des réseaux optiques bidimensionnels, générés en champ proche. Pour détecter la distribution atomique à d’aussi courtes distances, nous avons développé une technique d’imagerie novatrice, qui nous permettra de contourner la limite de diffraction. Une fois terminé, notre système d’imagerie pourrait potentiellement détecter et identifier des sites individuels du réseau optique sub-longueur d’onde.Dans ce manuscrit, je décris le travail que j’ai effectué pour construire l’expérience AUFRONS,ainsi que l’étude de faisabilité que j’ai réalisée pour la technique d’imagerie à super-résolutionFor some time now, theoretical physicists in condensed matter face a majorproblem: the computing power needed to numerically simulate and study some interactingmany-body systems is insufficient. As the control and use of ultracold atomic systems hasexperimented a significant development in recent years, an alternative to this problem is to usecold atoms trapped in optical lattices as a quantum simulator. Indeed, the physics of electronsmoving on a crystalline structure of a solid, and the one of trapped atoms in optical lattices areboth described by the same model, the Fermi-Hubbard model, which is a simplifiedrepresentation of fermions moving on a periodic lattice. The quantum simulators can thusreproduce the electrical properties of materials such as conductivity or insulating behavior, andpotentially also the magnetic ones such as antiferromagnetism.The AUFRONS experiment, in which I worked during my PhD, aims at building a quantumsimulator based on cooled atoms of 87Rb and 40K trapped in near field nanostructured opticalpotentials. In order to detect the atom distribution at such small distances, we have developedan innovative imaging technique for getting around the diffraction limit. This imaging systemcould potentially allow us to detect single-site trapped atoms in a sub-wavelength lattice.In this thesis, I introduce the work I have done for building the AUFRONS experiment, as wellas the feasability study that I did for the super-resolution imaging technique
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Scullin, Michelle E. "Integrating Value Stream Mapping and Simulation." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd898.pdf.
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Coskun, Cagdas. "Software Development For Multi Level Petri Net Based Design Inference Network." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605278/index.pdf.
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This thesis presents the computer implementation of a multi resolutional concurrent, design inference network, whose nodes are refined by PNDN (Petri Net Based Design Inference Network) modules. The extended design network is named as N-PNDN and consists of several embedded PNDN modules which models the information flow on a functional basis to facilitate the design automation at the conceptual design phase of an engineering design. Information flow in N-PNDN occurs between parent and child PNDN modules in a hierarchical structure and is provided by the token flow between the modules. In this study, computer implementation of the design network construction and token flow algorithms for the N-PNDN structure is restored and therefore the previous DNS (Design Network Simulator) is adapted for the multi layer design and decomposition of mechatronic products. The related algorithms are developed by using an object oriented, visual programming environment. The graphical user interface is also modified. The further developed DNS has been used for the application of the N-PNDN structure in the conceptual design of 5 mechatronic systems. In the guidance of this study, it has been understood that the further developed DNS is a powerful tool for designers coming from different engineering disciplines in order to interchange their ideas.
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Penndorf, Timo. "Softwarearchitektur für die interaktive Simulation mobiler Arbeitsmaschinen in virtuellen Umgebungen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-108146.
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Die numerische Simulation ist ein unverzichtbares Werkzeug bei der Produktentwicklung geworden. Bereits in den frühen Phasen von Studien und Konzepten können unterschiedliche Lösungsansätze für eine Aufgabenstellung bewertet werden. In diesem Zusammenhang wird von virtuellen Prototypen gesprochen. Bei der Simulation mobiler Arbeitsmaschinen erfordert das die Einbindung des Bedieners. Die technologische Leistungsfähigkeit wird wesentlich durch die Interaktion zwischen Bediener und Maschine geprägt. Die Beschreibung des Bedieners durch mathematische Modelle ist bis zum gegenwärtigen Zeitpunkt nicht mit belastbaren Resultaten erfolgt. Die Entwicklungen im Bereich der Simulationstechnologie und der Computergrafik ermöglichen die Durchführung interaktiver Simulationen in komplexen virtuellen Welten. Damit lässt sich der Bediener direkt in die Simulation einbinden und es können zusätzliche Potenziale, wie z. B. bei der Untersuchung der Mensch-Maschine-Interaktion erschlossen werden. Durch die interaktive Simulation in Virtual-Reality-Systemen werden neue Anforderungen an die Simulationssoftware gestellt. Zur Interaktion mit dem Bediener müssen die Eingaben aus den Bedienelementen in Echtzeit verarbeitet und audiovisuelle Ausgaben generiert werden. Dabei sind neben den mathematisch-physikalischen Aspekten der Simulation auch Problemfelder wie Synchronisation, Kommunikation, Bussysteme und Computergrafik zu behandeln. Die Anpassung des Simulationssystems an unterschiedliche Aufgabenstellungen erfordert ein flexibel konfigurierbares Softwaresystem. Als Lösung dieser Aufgabenstellung wird eine Softwarearchitektur vorgestellt, welche die unterschiedlichen Problemfelder durch klar voneinander abgegrenzte Komponenten mit entsprechenden Schnittstellen behandelt. Das entstandene Softwaresystem ist flexibel und erweiterbar. Die Simulationsaufgabe wird durch die Konfiguration des Komponentensystems spezifiziert. Die entstehenden Konfigurationsdateien bilden die Anwendungslogik ab und stellen daher einen der wesentlichen Kostenfaktoren bei der Realisierung interaktiver Simulationen dar. Zur Erhöhung der Wiederverwendbarkeit bestehender Konfigurationsfragmente wird ein kompositionsbasierter Ansatz auf der Basis von Skriptsprachen gewähltNumerical simulation has evolved into an indispensable tool in modern product development. Even in the early design phases of studies and concepts several different approaches for one individual task can be evaluated. In this context the term virtual prototypes can be used. For effective simulation of mobile construction site machinery incorporation of the operator\'s influence is required. The technological performance of the machinery is essentially influenced by the interaction between the operator and the machine. Currently, there are no known mathematical models describing the operator\'s behaviour, which give substantiated results. The latest developments in computing technology and computer graphics facilitate interactive simulations in complex virtual worlds. This allows not only the operator to be linked to the simulation but also the investigation of additional research areas such as human-machine-interaction. The application of interactive simulation in virtual reality systems places new demands on the simulation software. Due to the interaction not only input signals from the instruments have to be processed but also audio and visual output has to be generated in real time. In addition to the mathematical and physical aspects of simulation, problems in the areas of synchronisation, communication, bus systems and computer graphics also have to be solved. The adaption of the simulation system to new tasks requires a flexible and highly configurable software system. As a response to these demands, a software architecture is presented which partitions the various problems into finite components with corresponding interfaces. The partitioning results in a flexible and extendable software system. The simulation task is specified by the configuration of the component system. The resulting configuration files reflect the application logic and therefore represent one of the main cost factors in the realisation of the interactive simulations. A composition-based approach is chosen as it raises the level of reuse of existing configuration fragments. This approach is based on scripting languages
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Zavala, Armando João. "Exercício de cidadania na Escola Pública Moçambicana apoiado por um jogo digital educacional : Projeto Civitas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/180559.
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O ensino - aprendizagem mediados por jogos digitais educacionais, quando integrados ao currículo de educação formal podem, além do desenvolvimento atencional-cognitivo, potencializar a construção de conhecimentos nas suas diversas nuances, bem como promover a capacidade imaginativa, estimulando o exercício da cidadania. Partindo desta propositura, esta tese estuda a possibilidade concreta de inserir um jogo digital educacional de construção de cidades em uma disciplina de TIC na escola pública, apoiado pela metodologia ativa do Projeto Civitas, e voltado para o exercício da cidadania. Assim, o estudo questiona sobre que efeitos o jogo Città, integrado na proposta metodológica do Civitas pode produzir na formação de alunos para o exercício da cidadania. A tese surge do questionamento do autor às práticas docentes no contexto de sala de aula no ensino secundário em Moçambique, instigada pela imersão do mesmo nas dinâmicas e vivências do grupo de pesquisa do Laboratório de Estudos em Linguagem, Interação e Cognição (LELIC/UFRGS), desde 2014, através da cooperação internacional do Projeto Civitas Brasil-Moçambique. Metodologicamente, adotamos uma abordagem dialógica, na perspectiva Bakhtiniana das pesquisas em ciências humanas Os enunciados advindos do diário de campo, software Multipoint Server 2011 e facebook, foram apreciados de acordo com o quadro referencial mencionado, o que nos permitiu trabalhar a sua arquitetônica dialógica na perspectiva ato responsável. Os resultados da pesquisa dão pistas de que experimentações envolvendo jogos digitais educacionais de construção, apoiados por essa metodologia ativa do Civitas, possibilitam explorar problemáticas de cidades na perspectiva ético-estético-política, potencializando um viés interdisciplinar. As aprendizagens decorrentes possibilitam a formação de valores como cooperação, solidariedade, reciprocidade, capacidade expressiva, crítica, de escuta e de responsabilidade para além da construção de conhecimentos.Teaching and learning mediated by digital educational games, when integrated into the formal education curriculum can, in addition to attentional - cognitive development, potentialize the construction of knowledge in its various nuances, as well as promote the imaginative capacity, stimulating the exercise of citizenship. Starting from this proposition, this thesis studies the concrete possibility of inserting a digital educational game of city construction in an ICT discipline in the public school, supported by the active methodology of the Civitas Project, and focused on the exercise of citizenship. Thus, the study questions what effects the game Città, integrated in the methodological proposal of the Civitas can produce in the formation of students for the exercise of citizenship. The thesis arises from the author's questioning of teaching practices in the context of a secondary school classroom in Mozambique, instigated by the immersion of the same in the dynamics and experiences of the research group of the Laboratory of Studies in Language, Interaction and Cognition (LELIC / UFRGS) , since 2014, through the international cooperation of Projeto Civitas Brasil- Moçambique. Methodologically, we adopt a dialogical approach, in Bakhtin's perspective of research in human sciences The statements from the field diary, software Multipoint Server 2011 and facebook, were appreciated according to the aforementioned frame of reference, which allowed us to work with its dialogic architecture in the perspective of responsible action. The results of the research give clues that experiments involving digital educational games, supported by this active methodology of the Civitas, make it possible to explore urban problems from the ethical-aesthetic-political perspective, enhancing an interdisciplinary bias. The resulting learning enables the formation of values such as cooperation, solidarity, reciprocity, expressive capacity, critical, listening and responsibility in addition to building knowledge.
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Ciutina, Liviu Adrian. "Assemblages et comportement sismique de portiques en acier et mixtes acier-béton : Expérimentation et simulation numérique." Rennes, INSA, 2003. http://www.theses.fr/2003ISAR0016.
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Le travail présenté dans ce mémoire concerne la réponse sismique d'ossatures non contreventées en portiques métalliques ou en portiques mixtes acier-béton, influencée par le comportement des assemblages. Les assemblages, de type poutre-poteau, en acier ou la partie en acier des assemblages mixtes sont réalisés par des platines d'extrémités boulonnées, utilisant des boulons H. R. à serrage contrôlé. La première partie de l'étude, à caractère expérimental, relate plusieurs séries d'essais effectués à Rennes et à Timisoara ; son objectif est de rechercher des dispositions constructives appropriées en vue d'obtenir un meilleur comportement ductile des assemblages métalliques et mixtes, soumis à des chargements de types monotone et cyclique, ces chargements pouvant être symétriques ou fortement dissymétriques. Une attention particulière est accordée à certains points de détails des assemblages : partie inférieure de la platine boulonnée au moyen d'essais élémentaires de type " T-stub ", type de chanfrein à exécuter pour le soudage des poutres à la platine, renforcement du panneau d'âme du poteau métallique par des doublures, etc. Cette étude a permis de confronter les résultats de l'expérience aux modèles de calcul des normes actuelles, et de proposer quelques recommandations et formules simples permettant un meilleur comportement dissipatif. Une deuxième partie porte sur le calibrage des modèles numériques à l'aide du logiciel DRAIN 2DX, par rapport aux résultats des essais expérimentaux. En utilisant un modèle à fibres pour les éléments de type poutre-poteau, et en intégrant les caractéristiques mesurées des matériaux, on peut arriver à un bon accord avec les résultats d'essais. Pour les assemblages proprement dits, un modèle sophistiqué, basé sur une courbe enveloppe de réponse multi-linéaire incluant un comportement cyclique dégradable conduit également à une simulation convenable des courbes réelles moment-rotation. Dans la troisième partie, qui s'appuie sur des analyses non linéaires dynamiques et sur des données d'accélérogrammes du sol, on s'efforce de tirer parti des comportements des assemblages métalliques et mixtes expérimentés en laboratoire. Cinq portiques, dont un métallique et quatre mixtes sont analysés, en considérant les poutres reliées aux poteaux par des assemblages ayant des comportements similaires à ceux expérimentaux, donc plus ou moins rigides et/ou plus ou moins résistants. L'emplacement des structures a été supposé dans des zones de nature et d'intensité sismiques différentes, en particulier la France et la Roumanie. Les réponses des structures sont jugées en termes d'exigences portant sur les rotations élasto - plastiques des zones dissipatives et les déplacements relatifs entre étages. La réponse en ductilité globale est traduite en termes de facteur de comportement q et de rendement sismique ηThe work presented in this report concerns the seismic response of moment resisting steel or composite steel-concrete frames, influenced by the behaviour of their joints. The steel of the beam-to-column joints or the steel part in the case of composite joints are realised by bolted end-plate connections, using HSF bolts with controlled preloading. The first part of the study, having an experimental character, relates several series of tests, performed at Rennes and at Timisoara; its objective is to research the appropriate constructive layouts for an improved ductile behaviour of the steel and composite end-plate beam-to-column connections under monotonic and cyclic types of loading, under symmetrical or strongly unsymmetrical conditions. A particular attention is given to some detail points of the connections: the inferior part of the end-plate, by means of basic experimental tests on “T-stub” subassemblies, bevel type used for welding of beams to the end plates, the reinforcing of the column steel panel of the steel column by doubling plates, etc. This study allowed us to compare the experimental results with those of the models proposed by recent codes and to propose some recommendations and simple formulae in order to permit a better dissipative behaviour. A second part concerns the calibration of numerical models, by the help of DRAIN 2DX computer code, according to the results of the experimental tests. In the case of beam-columns type of elements, using a fibre model and including the measured characteristics of the materials it was proved that we can arrive to a good agreement as compared to the experimental results. As for the connections themselves, a sophisticated model, based on a multi-linear envelope curve of response and including a degrading cyclic behaviour, leads also to an adequate simulation of the real moment-rotation response curves. Into the third part, based on the dynamic non-linear analyses and on soil accelerograms, we try to take advantage of the behaviour of the steel and composite connections tested in laboratory. Five moment frames, from which one metallic and four composite are analysed, considering the beams jointed to columns by connections having a similar behaviour of those tested experimentally, so more or less rigid and/or more or less resistant. The location of the structures was supposed in zones having different nature and seismic levels, particularly in France and Romania. The responses are judged in terms of the required élasto-plastic rotation of the dissipative elements and by the required inter-story drifts. The global ductility response is interpreted in terms of the behaviour factor q and of the seismic performance factor η
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SINGH, ARUN K. "ELECTRONIC SIMULATION IN CONSTRUCTION." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1014666670.
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Fadi, Abdallah el. "Spécification comportementale temporelle dans un simulateur multi-niveaux." Grenoble INPG, 1988. http://www.theses.fr/1988INPG0039.
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Cette thèse aborde les problèmes de la validation automatique dans le domaine CAO de matériels informatiques et électroniques, en liaison avec des techniques de simulation mixte. Le but a été d'établir une méthodologie de spécification comportementale basée sur l'utilisation de primitives logiques et temporelles permettant de conditionner certaines propriétés des systèmes modélises et simulés
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Hubeňák, Marian. "Návrh a implementace modelů efektů v simulačním systému OneSAF Testbed Baseline." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2009. http://www.nusl.cz/ntk/nusl-412819.
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This project deals with the modelling and the simulation, its basic characteristics as well as its respective branches. The majority of the project is aimed at modelling and simulation in military environment with a description of the asset in this area while considering different uses of these simulations. I also introduce the development of modelling and simulation in the army of Czech Republic. The project also deals with the constructive simulation and tries to bring out the OneSAF Testbed Baseline simulation system. At last, I propose some concepts of models for this particular simulation system - the model of psychological effects and the model of generating the rubble during the operations of the artillery.
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Nigudkar, Narendra Shriniwas. "Effectiveness of 4D construction modeling in detecting time-space conflicts of construction sites." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2702.
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This research investigated whether 4D construction model effectively helps project
participants on construction sites in detecting time-space conflicts in the schedule.
Previous researchers on construction space management typically modeled space
requirements for equipment and paths for material and focused primarily on static or
dynamic layout planning. Some researchers regarded time-space conflicts as an essential
aspect of construction space management. They demonstrated the use of 4D modules in
time-space conflict analysis. Although these 4D prototypes have been successful in
tackling time-space conflict analysis, they have been validated with only post-hoc
analysis of construction projects. Also, various currently commercially available 4D
visualization softwares do not take into account the workspace required during the
construction of a component unless space is modeled as a separate component into the
CAD application. Therefore, without modeling space as a component in the 3D model it
is necessary to assess whether 4D visualization can be effectively used on construction
sites to detect time-space conflicts in the schedule. In order to fulfill the research goal an experiment was conducted. A 4D construction
model of an ongoing project was developed.
Project participants were introduced to two different graphic representations of the
schedule; namely, an overlay drawing - the conventional method used on site to detect
conflicts and the 4D construction model. Analysis of the results compared the
performance of the participants in detecting time-space conflicts in the schedule using
the two methods.
The experiment produced empirical evidence that a 4D construction model may be
effective on construction sites in detecting time-space conflicts in the schedule.
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Chan, Wai Kin. "Dynamic simulation of construction waste in Macao." Thesis, University of Macau, 2008. http://umaclib3.umac.mo/record=b1780621.
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Dicko, Ali Hamadi. "Construction of musculoskeletal systems for anatomical simulation." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENM084/document.
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L'usage d'humains virtuels s'est démocratisé à de nombreuses activités ces dernières années.Au-delà de la chirurgie virtuelle, les corps virtuels sont de plus en plus utilisés pour concevoir des dispositifs médicaux, des véhicules et des outils de notre quotidien plus généralement.Ils se sont avérés être également d'extraordinaires supports à l'apprentissage de l'anatomie.De récents films (Avatar, Le seigneur des anneaux, etc) ont démontré que l'anatomie et la biomécanique peuvent être utilisées pour concevoir des personnages d'une grande qualité.Cependant, reproduire le comportement des structures anatomiques demeure une tâche complexe, et de nombreuses connaissances variées sont nécéssaires à la mise en place de simulation de qualité de nos organes. Ceci fait de la modélisation pour la simulation d'humains une problématique non résolue, une tâche fastidieuse, mais également un sujet de recherche fascinant.À travers ces travaux de thèse, nous abordons cette problématique de la construction de systèmes musculo-squeletiques pour ces domaines variés : animation, biomécanique et aide à l'apprentissage.Notre objectif est de simplifier le processus entier de création en le rendant plus intuitif et plus rapide.Notre approche consiste à pallier à chacune des difficultés, à savoir : la représentation et la manipulation de connaissances anatomiques, la modélisation géométrique et la simulation efficace de systèmes musculosquelettiques grâce à trois principalescontributions introduites durant ces travaux de recherche.Notre première contribution se focalise sur la construction biomécanique d'un modèle hybride du rachis lombaire.Dans ces travaux, nous montrons que les approches hybrides combinant des systèmes de corps rigides et des modèles éléments finis permettent d'obtenir des simulations en temps intéractifs, précises, et respectant les principes de l'anatomie et de la mécanique.Notre seconde contribution s'intéresse aux problématiques liées à la complexité des connaissances anatomiques, physiologiques et fonctionnelles. En se basant sur une ontologie de l'anatomie et une ontologie inédite de la physiologie humaine, nous introduisonsun pipeline pour la construction automatique de modèles simulant les fonctions de nos organes.Celles-ci permettent d'exploiter les connaissances anatomiques complexes via des requêtes simples.Les sorties de ces requêtes sont utilisées pour créer des modèles simulables retranscrivant les aspects fonctionnels tels qu'ils ont été formalisés et décrits par les anatomistes.Enfin, notre troisième contribution : le transfert d'anatomie, permet d'adapter les modèles géométriques et mécaniques à la morphologie de patients spécifiques.Cette nouvelle méthode de recalage permet de reconstruire automatiquement l'anatomie interne d'un personnage défini par sa peau en transférant les organes d'un personnage de référence.Elle permet de pallier à la nécessité de re-construire ces géometries pour chaque nouvelle simulation, et contribue ainsi à accélérer la mise en place de simulations spécifiques à une grande variété d'individus de morphologie différenteThe use of virtual humans has spread in various activities in recent years.Beyond virtual surgery, virtual bodies are increasingly used to design medical devices, vehicles, and daily life hardware more generally.They also turn out to be extraordinary supports to learn anatomy.Recent movies (Avatar, Lord of the Rings, etc) demonstrated that anatomy and biomechanics can be used to design high-quality characters.However, reproducing the behavior of anatomical structures remains a complex task, and a great amount and variety of knowledge is necessary for setting up high quality simulations.This makes the modeling of human body for simulation purposes an open problem, a tedious task, but also a fascinating research subject.Through this PhD, we address the problem of the construction of biomechanical models of the musculoskeletal systems for several domains : animation, biomechanics and teaching.Our goal is to simplify the entire process of model design by making it more intuitive and faster.Our approach is to address each difficulty : the representation and use of anatomical knowledge, the geometrical modeling and the efficient simulation of the musculoskeletal system thanks to three novel contributions introduced during these research works.Our first contribution focuses on the biomechanical construction of a hybrid model of lumbar spine.In this work, we show that hybrid approaches that combine both rigid body systems and finite element models allow interactive simulations, accurate, while respecting the principles of anatomy and mechanics.Our second contribution addresses the problem of the complexity of anatomical, physiological and functional knowledge.Based on a novel ontology of anatomical functions of the human body, we introduce a novel pipeline to automatically build models that simulate physiological functions of our bodies.The ontology allows us to extract detailed knowledge using simple queries.The outputs of these queries are used to set up simulation models of the functional aspects as they were formalized and described by anatomists.Finally our third contribution, the anatomy transfer, allows the mapping of available geometrical and mechanical models to the morphology of any specific individual.This novel registration method enables the automatic construction of the internal anatomy of any character defined by his skin, by transferring organs from a reference character.It allows to overcome the need to re-construct these geometries for each new simulation, and it contributes to accelerate the simulations setup for a range of people with different morph
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Kamat, Vineet Rajendra. "Enabling 3D Visualization of Simulated Construction Operations." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/35470.
Full textAbstract:
Simulation modeling and visualization can substantially help in designing complex
construction operations and in making optimal decisions where traditional methods prove
ineffective or are unfeasible. However, there has been limited use of simulation in
planning construction operations due to the unavailability of appropriate visual
communication tools that can provide users with a more realistic and comprehensible
feedback from simulation analyses. Visualizing simulated construction operations in 3D
can significantly help in establishing the credibility of simulation models. In addition, 3D
visualization can provide valuable insight into the subtleties of construction operations
that are otherwise non-quantifiable and presentable.
New software development technologies emerge at incredible rates that allow engineers
and scientists to create novel, domain-specific applications. This study capitalized on a
computer graphics technology based on the concept of the "Scene Graph" to design and
implement a general-purpose 3D Visualization System that is Simulation and CAD-software
independent. This system, the "Dynamic Construction Visualizer", enables
realistic visualization of modeled construction operations and the resulting products in
3D and can be used in conjunction with a wide variety of simulation tools. This thesis
describes the "Dynamic Construction Visualizer" as well as the "Scene Graph"
architecture and the Frame Updating algorithms used in its design.Master of Science
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Wan, Weijie 1982. "Simulation and optimization of MEMS actuators and tunable capacitors." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99798.
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Micro-Electro-Mechanical Systems (MEMS) have played an important role in modern microelectronics, thermal, mechanical and hybrid systems. MEMS technology is a very promising means that might have a great impact on almost every corner of the society. Although many design methodology of MEMS already exists, not as much attention was given to the synthesis and optimization of MEMS devices. This thesis focuses on the optimization of MEMS actuators and MEMS tunable comb drive capacitors. The optimization is based on changing device geometry to achieve desired output parameter profile. For example in the design of MEMS tunable comb drive capacitors, the output parameter is the capacitance tuning range. Numerical experiments were performed to show the successful implementation of the optimization method.
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Chang, Ching-Jen. "Construction Simulation of Curved Steel I-Girder Bridges." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11592.
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This study addresses the development of a prototype software system for analysis of horizontally curved steel I-girder bridges using open-section thin-walled beam theory. Recommendations are provided for the use of three-dimensional (3D) grid idealizations in analyzing curved I-girder bridge structural systems. The 3D grid idealizations account for the general displacements and rotations common within complex curved I-girder bridge structures, i.e., none of the displacement and rotational degrees-of-freedom are arbitrarily assumed to be equal to zero. Also, these idealizations account for the warping (or cross-bending) deformations of the I-girder flanges that dominate typical girder torsional responses. An approximate approach is investigated for capturing the influence of girder web distortion on composite I-girder responses.
A key focus of this research is the development of prototype methods for simulating the construction of curved steel I-girder bridges, including erection of the steel and staged casting of the slab. The resulting capabilities allow engineers to evaluate the deflections, reactions and/or stresses at different stages of the steel erection or concrete slab construction, determine required crane capacities, tie-down, jacking or come-along forces, and calculate incremental displacements due to removal of temporary supports. Also, the capabilities can be used to determine the influence of different steel detailing methods on the bridge geometry, such as the web plumbness under the steel or total dead load. Key requirements necessary to ensure accuracy of the analysis results are addressed.
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Mather, Kevin R. "A CAD-based simulation modeling methodology for construction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0004/MQ28964.pdf.
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Clegg, David Richard. "A construction-specific simulation-based framework for earthworks." Thesis, Sheffield Hallam University, 1999. http://shura.shu.ac.uk/19480/.
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Construction companies are operating within an increasingly competitive environment. Work often has to be tendered for on a very low profit basis. If the tender is too high, work is lost. If too low the contract may be won, but the job completed at a loss, unless more effective working methods can be found. Plans are used throughout the construction industry to allocate resources and schedule work. Yet, the planning tools used; Gantt chart, PERT and Queuing theory to name but a few, represent jobs as if they are static in duration, which in the complex, dynamic construction environment are clearly inappropriate. The EPSRC fuelled interest in developing a simulation methodology by suggesting that the construction industry could be considered similar to the traditional manufacturing industry. The manufacturing industry faced similar production dilemmas, work was completed but using inefficient resource configurations, causing bottlenecks, increased work-in-progress leading to higher costs. To reduce number of problems the manufacturing industry sought to utilise and develop a planning technique that had the capacity for modelling the dynamic nature of the industry. Discrete-event simulation enables the problems associated with manufacturing to be anticipated and minimised, as opposed to constantly fire-fighting. Since using simulation has accrued such impressive benefits within the manufacturing industry it is therefore not without credence to believe that the construction industry could also obtain saving from embracing this management tool. Simulation has been applied to model a number of scenarios within the construction industry. Similarities between the applications were sought and an area for further development was identified. A problem was modeled using the most frequently encountered simulation paradigms found in the manufacturing and construction industries, 'Activity cycle' and 'Process based'. Of the two methodologies, 'Process based' was selected for the development of further models. A conclusion drawn from the research is that simulation is not being utilized within the construction industry due to the perception that it requires an excessive use of resources. The research project identified that the model building process may be simplified through the development of generic simulation modules. These generic modules enable a simulation model to be developed quickly and easily by a non-simulation practitioner. The generic modules can be connected to represent the layout of an earthmoving operation. A host of scenarios can thus be modeled with the minimum of time and effort. To ensure that only significant data and process logic was collected and included within the modules the experimental methodology factor analysis was employed. Using this experimental technique, the relationship between and significance of ten different factors were established. Further experiments were performed on the most significant factors establishing an appropriate level of detail for those factors. It was beyond the scope of this thesis to develop modules for every conceivable construction process. Therefore, a methodology is given documenting the development of the chosen construction processes.
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Baba, Ahmadi Mohammad Hassan. "Construction of inlet conditions for large eddy simulation." Thesis, University of Exeter, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.740749.
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Everitt, Mark Stanley. "Construction, theory and simulation of cavity QED systems." Thesis, University of Leeds, 2009. http://etheses.whiterose.ac.uk/2786/.
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The microscopically pumped maser, or micromaser is a cavity QED experiment intended to be a physical realisation of the Jaynes-Cummings model of a single two-level atom interacting with a single mode electromagnetic field. This is the simplest model that describes the interaction between light and matter, yet it predicts behaviour unexpected from semiclassical models, such as the revival of Rabi oscillations of an atom interacting with an initially coherent field and non-monotonic linewidth as a function of pumping. The micromaser at the University of Leeds consists of a high quality superconducting microwave cavity designed to be resonant with the transition between two specific Rydberg states of rubidium. These two states behave like an ideal two level atom, and couple strongly to the cavity field due to a large dipole moment. These Rydberg atoms are passed through the cavity in a rarified beam such that in most instances when there is an atom in the cavity, there will only be one, closely approximating the Jaynes-Cummings model. I present experimental work on the build phase of the micromaser. Specifically I routed all of the wiring and microwave lines in the cryostat that contains the micromaser, and designed mounts for various components. I also designed several testing methods for probing high quality microwave cavity resonances and quality factors which are presented. Using the Jaynes-Cummings model as a prototype, I demonstrate how extensions to the model can be used to construct universal quantum logic gates that operate on photonic qubits in a multi-mode cavity. This could be realised in a micromaser with a multi-mode cavity. Conversely, I demonstrate that by using atoms as qubits, detuned cavities can be used to generate entangled resources such as the Greenberger-Horne-Zeilinger state, the W state, and graph states of atoms. I show that single qubit rotations on Rydberg atom qubits have already been experimentally demonstrated so that in combination these entangled resources are useful for quantum metrology, quantum computation and even tests of quantum gravity.
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Han, Choong-Hee. "Artificial intelligence methodology for simulatron modeling." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/20285.
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Bignon, Jean-Claude. "MODÉLISATION, SIMULATION ET ASSISTANCE À LACONCEPTION-CONSTRUCTION EN ARCHITECTURE." Habilitation à diriger des recherches, Université Henri Poincaré - Nancy I, 2002. http://tel.archives-ouvertes.fr/tel-00145570.
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Ce mémoire présente un bilan des travaux de recherches que j'ai dirigé au CRAI (Centrede Recherche en Architecture et Ingénierie) depuis environ dix ans. Avant de développer
les deux grandes problématiques qui ont structuré ces années, je voudrais remettre
rapidement en perspective mon travail global de recherche dans le vaste mais encore très
récent domaine de la recherche en architecture.
1.1. LA RECHERCHE EN ARCHITECTURE, QUELS
SYSTÈMES DE CONNAISSANCES ?
Jusqu'au milieu des années 1960, l'architecture est avant tout un art, c'est-à-dire une
pratique reposant largement sur l'expérience, fondée sur des grands traités et infléchie par
quelques maîtres.
Au niveau le plus empirique, le terme de recherche ne désigne rien d'autre que la pratique
quotidienne du concepteur en situation de création pour inventer un dispositif spatial en
réponse à des exigences explicites ou implicites.
Comme le musicien, le peintre ou le sculpteur, l'architecte est une sorte de « chercheur de
formes », un inventeur de langages, un constructeur de sens.
Dans cet univers de la recherche-action, le concepteur utilise et produit des connaissances
qui relèvent plus d'un savoir-faire que d'un véritable savoir. À cette recherche, tout ancrée
dans la projetation, nous donnons le nom de recherche architectonique.
Dans ce dispositif, le terme d'architecture désigne donc à la fois un domaine de production
(essentiellement les édifices et les espaces urbains) et un savoir-faire largement issu et
opératoire dans la pratique du projet. Mais pour être efficace, cette économie de la
production architecturale a besoin d'un discours régulateur et légitimateur destiné à
permettre des choix tout au long du processus de conception, évaluer les solutions
partielles ou globales proposées et juger la qualité des œuvres produites. C'est le rôle des
traités, parfois nommés théories.
Les traités d'architecture de Vitruve à Le Corbusier bien que théoriques par le recul qu'ils
prenaient par rapport aux pratiques de leurs époques respectives ne peuvent pas
cependant être considérés comme des théories au sens scientifique du terme. Ce
deuxième type de connaissances, auxquelles nous donnons le nom de doctrine est un
système de préceptes et d'axiomes transmissibles, orientés par l'action vers l'action. Par
différence avec les connaissances souvent singulières et peu externalisables des savoir-
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Terrance, Cheryl A. "Jury simulation, the construction of victims in the courtroom." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ57630.pdf.
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Oner, Erdinc. "A SIMULATION APPROACH TO MODELING TRAFFIC IN CONSTRUCTION ZONES." Ohio University / OhioLINK, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1108146637.
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Dowling, Deborah Caitlin. "Experiments on theories : the construction of scientific computer simulation /." Connect to thesis, 1998. http://eprints.unimelb.edu.au/archive/00003581.
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Terrance, Cheryl A. (Cheryl Ann) Carleton University Dissertation Psychology. "Jury simulation; the construction of victims in the courtroom." Ottawa, 2000.
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Qasim, M. "Improving highways construction processes using computer-based simulation techniques." Thesis, University of Salford, 2018. http://usir.salford.ac.uk/49496/.
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Roads are long-term infrastructure investments and are a valuable asset to the community. While it is crucial to construct new roads for various societal functions, maintaining the existing ones is also essential to develop a safe and accessible road network. Road construction projects suffer from tight schedules, massive traffic volumes, low budgets and environmental constraints that affect the productivity of road construction. Road sector is quite fragmented, and various companies are involved in a construction process. Most of these businesses have their internal procedures that are usually different from other stakeholders, which make it more complicated to improve a particular process. This research aimed to improve highways construction processes at the activity level by using the integration of manual and computer-based simulation tools. This research involved simulating two different as-is process highways related operations to experiment different what-if scenarios that are not possible otherwise to try in real life. It also involved investigating the underutilisation of simulation techniques in the highway sector. The case studies chosen for this project were resurfacing (maintenance) and earthworks (construction) operations. This integration of simulation and lean boosted the output of various highways maintenance and construction operations and maximised the efficiency of resources involved. The data was collected from reports, on-site observations and constant collaboration with the industry partners. This research succeeded in developing two artefacts (two detailed, lean-integrated simulation models) which were based on real projects and were verified and validated by the experts from highways and simulation backgrounds. It involved using Design Science or Constructive research methodology to identify an industry based problem, study it in detail and then develop a practical solution which can be implemented by industry to solve this issue. The developed models are based on two particular case studies; however, they are designed in such a way that they can be easily modified according to the needs and conditions of different countries and similar projects. There are thousands of simulation models available online but lack the ability and freedom to change accordingly and do not have detailed guidelines about its construction, usage and adjustments. A significant knowledge gap exists regarding improvement of construction processes. Existing optimisation approaches are based on manual procedures, are fragmented and not making the best use of computer-aided methods to improve operations. As the industry is becoming more competitive, there is a need to enhance various construction (decision making and ground level) activities that can ultimately improve the efficiency for overall construction projects. Current improvement approaches mostly involve manual procedures like Value Stream Mapping, DRIVE (Define-Review-Identify-Verify-Execute), PDCA (Plan-Do-Check-Act) and process mapping etc. These processes can further be enhanced by using a computer-based environment to experiment different what-if situations. The demand for enhancement can be fulfilled by utilising computer-based simulation methods that have already proven its ability in manufacturing, process and production industries. This research contributes to the existing body of knowledge by adapting constructive research methodology or design science method for developing a practical solution to improve highways/construction processes. The research is based on two real-life case studies, and all data collection is being done within the structure of case studies. These projects are first studied in detail, and then different experimental scenarios are performed to improve the as-is processes. This research was based on two different sorts of highways operations (resurfacing and earthworks), and the findings are limited to these two operations only. Even though these operations are the most frequent and important ones, there are many other processes which can also be studied and improved in the same manner. At the same time, the models created in this research are designed not to be very project-specific and can be used in projects of a similar nature.
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Carr, Michael Nicholas 1973. "Simulation to assess cast-in-place concrete construction innovations." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50451.
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Springman, Sarah Marcella. "Lateral loading on piles due to simulated embankment construction." Thesis, University of Cambridge, 1989. https://www.repository.cam.ac.uk/handle/1810/252811.
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The objective of this research work was to gain a better understanding of the interaction between loads applied on the surface of soils, and the behaviour of adjacent long, vertical piles, embedded at depth in a stiff substratum. The influence of lateral thrust on the piles in an upper soft clay layer, due to simulated embankment construction, was examined and soil- pile interaction mechanisms were identified both for behaviour at working load and at the ultimate lateral capacity. The performance of a row of free headed piles and of a pile group were investigated experimentally in the geotechnical centrifuge for different pile and foundation geometries. Pile response, in terms of bending moment, deflection and lateral pressure, was determined for surcharge loads applied to the centrifuge model. This experimental database was used to calibrate a three dimensional finite element analysis of the same, simplified, model. These investigations led to the development of an approximate formula for lateral loading, based on the differential movement between the piles and the surrounding soil, which accounted for pile spacing, relative pile-soil stiffness and the degree of soil strength mobilisation. This loading function was incorporated in a computer program, SIMPLE, which calculated the pile bending moment and deflection profiles for flexible piles and pile groups. The algorithm was checked against the centrifuge model test results and the numerical analyses, and design charts were produced for free headed piles only. Finally a design procedure was recommended for piled full-height bridge abutments and other facilities which feature passive lateral loading of piles by a nearby surcharge.
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Al-Masalha, Sami. "A Common Taxonomy for Modeling Construction Operations." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/26518.
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The construction industry continues to strive for new ways to improve construction operations. This requires better understanding and analysis of these operations, which necessitates a way to systematically capture and analyze the diverse elements involved. The dynamic nature of construction is very difficult to describe using existing computer simulation and modeling systems. What is needed is rather a common construction language and a comprehensive modeling system that can be used to capture and analyze construction operations and potentially lead to improvements.
A new taxonomy and its use for modeling construction operations are developed here. This taxonomy identifies a hierarchical representation of construction projects based on operational considerations. The hierarchy consists of seven levels: product, assemblies and subassemblies, components, operations, processes, physics, and control. The hierarchical levels were established by looking in the ways that construction field operations are being carried out. The new modeling system successfully accounts for the geometric and physical representations of not only the product but also the processes involved in shaping the product. Six major blocks of construction knowledge are described and information about the interaction processes required to model construction operations in a logical way is provided.
An overview of the current state of modeling and simulation techniques that are used to develop and evaluate construction operations is presented. The advantages and limitations of physical-based modeling, 4D-CAD, and virtual modeling techniques as an integral part of the developed taxonomy are identified. The potential uses of robotics and automation opportunities in construction are described. Also, distribution of work between humans and tools and equipment based on their physical and information contributions are reviewed and analyzed. Classifications of construction work at different levels of detail are described to identify which operations can be usefully modeled and the appropriate level of the model.
Two practical case studies are discussed that show the capabilities and potential uses of the developed taxonomy. The first case study describes the modeling process of the fabrication, assembly, and erection of steel structures. The second exploratory case study shows the potential use of the developed modeling in improving the heat recovery system generator's (HRSG) erection process. Also, prototype models and 3D models of the HRSG assemblies are developed. Both case studies validate with great confidence the use of the developed taxonomy as a direct support tool that captures the diverse elements and enhances the modeling and analysis to improve construction operations.Ph. D.
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Green, Lilian. "Dynamic simulation for whole life appraisal." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325206.
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Robert, Florent Royis Patrick Lamarque Claude-Henri. "Contribution à l'analyse non linéaire géométrique et matérielle des ossatures spatiales en Génie Civil application aux ouvrages d'art /." Villeurbanne : Doc'INSA, 1999. http://docinsa.insa-lyon.fr/these/pont.php?id=robert.
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Sepehri, Nariman. "Dynamic simulation and control of teleoperated heavy-duty hydraulic manipulators." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30846.
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Some relevant aspects of dynamics and control of heavy-duty hydraulic machines in a teleoperated mode were investigated. These machines, such as excavators and forest
harvesters, are mostly used in primary industries. They have a manipulator-like structure with a nonlinear and coupled actuating system. The aim of the project is to investigate different approaches towards converting such machines, with minimum changes, into task-oriented human-supervisory control systems. This provides the opportunity
to use both human supervision and robotic power in hazardous environments and for tasks for which human decision is necessary.
A methodology was developed for fast and accurate simulations. Analytical, steady-state and numerical techniques were combined using Large-Scale Systems analysis. The inclusion of nonlinearities in the form of discontinuities (e.g., gear backlash and stick-slip friction) in the model was investigated. Numerical simplifications of the structural dynamics and alternative solutions for the hydraulic part were also studied.
The model describing the performance of the machine has been written in ACSL (Advanced Continuous Simulation Language) on a VAX computer system. A modified version of the program is at present running close to real-time on a single processor in conjunction with high speed graphics in a manner similar to a flight simulator used for human interface studies and training.
The model also evaluates the performance of the machine in a teleoperated mode and under different control strategies. As a result a velocity control algorithm has been developed which is applied in conjunction with the closed-loop components for teleoperation of heavy-duty hydraulic machines; it is basically a feedforward compensation
which uses the measured hydraulic line pressures along with fluid-flow equations as criteria
to control the joint velocities as well as to uncouple the interconnected actuating system. The control algorithm has been written in C language and is running on an IRONICS computer system, interfaced between the human operator and the machine. The simulation results are supported by the experimental evidence. The experiments were performed on a Caterpillar 215B excavator.
Improved operator safety, extension of human capability, job quality and productivity
increase are the advantages of a successful implementation of robotic technology to these industrial machines.Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate
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Skolnick, Jeffrey F. "Visual schedule simulation system." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42195.
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Current planning and scheduling techniques are carried out in an unstructured form with considerable reliance on planners judgement, imagination and intuition. The final product of such techniques is typically a lengthy textural and tabular report and/or symbolic network. This serves as an abstract rather than visual modeling of the real construction process. The availability of advanced computer hardware and software allows us, today, to develop new planning and scheduling techniques to overcome the current limitations.
Computer-Aided Design (CAD) is a computing system which makes extensive use of computer graphics. The use of CAD systems in construction presents a great opportunity for integrating engineering and construction processes in a more cost effective way. The combination of computer graphics, animation, and 3D computer modeling can be extremely effective for real-time simulation and visualization to support engineering and construction from the conceptual design to the construction process.
This thesis presents a new planning and scheduling system. The system combines a construction scheduling network with 3D computer models to form a Visual Scheduling Simulation (VSS) of the construction process. The VSS system simulates, or put into motion, construction activities so they can be viewed at a graphics display.
The VSS system allows the user to view the actual and planned construction sequence. The user has the option to view either: planned schedule; actual schedule; or both schedules shown side by side for quick visual comparison. The user has the option to visually simulate the entire construction project, or any specified time period. This simulation can be viewed for a partial segment or the entire configuration of the project.Master of Science
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Pradhananga, Nipesh. "Construction site safety analysis for human-equipment interaction using spatio-temporal data." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52326.
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The construction industry has consistently suffered the highest number of fatalities among all human involved industries over the years. Safety managers struggle to prevent injuries and fatalities by monitoring at-risk behavior exhibited by workers and equipment operators. Current methods of identifying and reporting potential hazards on site involve periodic manual inspection, which depends upon personal judgment, is prone to human error, and consumes enormous time and resources. This research presents a framework for automatic identification and analysis of potential hazards by analyzing spatio-temporal data from construction resources. The scope of the research is limited to human-equipment interactions in outdoor construction sites involving ground workers and heavy equipment. A grid-based mapping technique is developed to quantify and visualize potentially hazardous regions caused by resource interactions on a construction site. The framework is also implemented to identify resources that are exposed to potential risk based on their interaction with other resources. Cases of proximity and blind spots are considered in order to create a weight-based scoring approach for mapping hazards on site. The framework is extended to perform ``what-if'' safety analysis for operation planning by iterating through multiple resource configurations. The feasibility of using both real and simulated data is explored. A sophisticated data management and operation analysis platform and a cell-based simulation engine are developed to support the process. This framework can be utilized to improve on-site safety awareness, revise construction site layout plans, and evaluate the need for warning or training workers and equipment operators. It can also be used as an education and training tool to assist safety managers in making better, more effective, and safer decisions.
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Filla, Reno. "Operator and Machine Models for Dynamic Simulation of Construction Machinery." Licentiate thesis, Linköping : Linköpings universitet, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4092.
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