Dissertations / Theses on the topic 'Scale prototype'
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Umans, Ari S. "Small-scale Advanced Thermo-Adsorptive Battery prototype." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101484.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 57-58).
A significant effort is underway to develop an adsorption-driven system with the capacity to replace the heating, ventilation and air-conditioning (HVAC) system in an electric vehicle. This Advanced Thermo-Adsorptive Battery (ATB) system uses novel adsorbent materials and methods of optimizing transport properties, without which the desired energy and power densities are unattainable. The work in this thesis runs parallel to that effort, with the development of a small-scale version of the ATB. Two novel prototype designs are discussed. The first, though never fully operational, was an attempt to demonstrate the potential of ATB technology to be scaled to meet countless heating and cooling applications. The second prototype was designed to be a system for testing aspects of ATB operation on a small scale. This prototype uses small quantities of adsorbents, reducing material costs and shortening time scales, and has a great deal of operating flexibility, enabling a number of system conditions to be parametrically studied. Testing and experimental procedures have been developed, and preliminary experimental data have been used to ensure proper prototype operation. This prototype will continue to be used as a tool to characterize ATB system operation and aid in understanding the technology.
by Ari S. Umans.
S.M.
Harpold, Adrian Adam. "Stream Discharge Measurement Using A Large-Scale Paticle Image Velocimetry Prototype." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/40870.
Full textMaster of Science
Calvo, Catoira Marta. "Small caliber arterial prosthesis: prototype and pre-industrialization." Doctoral thesis, Università del Piemonte Orientale, 2020. http://hdl.handle.net/11579/114874.
Full textPorter, Spencer. "A prototype of a centimeter-scale biomimetic fish using buckypaper composite actuators." Tallahassee, Fla. : Florida State University, 2010. http://purl.fcla.edu/fsu/lib/digcoll/undergraduate/honors-theses/2181954.
Full textAdvisor: Dr. Richard Liang, Florida State University, College of Engineering, Dept. of Industrial Engineering. Includes bibliographical references.
Stallings, Brad L. "Design of a ship service converter module for a reduced-scale prototype integrated power system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.navy.mil/100.2/ADA392078.
Full textThesis advisor(s): Ciezki, John G. ; Ashton, Robert W. "December 2001." Includes bibliographical references (p. 201-202). Also available in print.
Saunders, Daniel Martin. "First data reconstruction and inverse beta decay analysis at the large scale SoLid prototype detector." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723466.
Full textMagnusson, Anton. "Hardware-In-the-Loop simulation of a small scale prototype of a Wave Energy Converter." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-20698.
Full textFörnybara energikällor är ett hett ämne, både när det gäller klimatförändringar och den ständiga ökningen av efterfrågan av el på grund av befolkningsökning och ett mer elektrifierat samhälle. En sådan energikälla är vågenergi - en energikälla med stor potential men fortfarande relativt ny med behov av vidareutveckling. Blekinge Tekniska Högskola (BTH) vill tillsammans med Ocean Harvesting Technologies (OHT) konstruera ett skalat Hardware-In-The-Loop (HIL) system av power take-off (PTO) baserat på OHT:s vågenergiomvandlare, InfinityWEC. Syftet är att lära eleverna på BTH om hydrodynamik och HIL-simuleringar. En manual kommer också att skrivas för att hjälpa eleverna att utföra labbaktiviteterna. En modell av HIL-systemet kommer först att konstrueras i Matlab/Simulink, både med och utan WEC-Sim hydrodynamisk simuleringsverktygslåda och simuleringar kommer att köras för att förutsäga systemens beteende. För att bestämma de nödvändiga parametrarna för hydrodynamiska modellen används Boundary Element Method koden NEMOH. HIL-systemet består av elmotorer, som är mekaniskt anslutna till varandra med en koppling. En av motorerna är ställdonet, som tillämpar vridmoment på den andra motorn enligt de simulerade hydrodynamiska belastningarna på bojen. Den andra motorn tillämpar ett vridmoment enligt belastningen som är kopplad till den eller är moment reglerad enligt en vald kontrollstrategi. I denna avhandling används två olika typ av belastning: 1) resistiv belastning utan kontroll av generatorndrivdonet, 2) resistiv och kapacitive belastning med reaktiv kontroll av generatorndrivdonet. Belastningsmotståndet kan ändras inom ett visst intervall och lika så havstillståndet. Data som kan samlas in är motorernas position och vinkelhastighet, strömmen till och från de två motorerna och spänningen över last kapasitatorn. I projektet drogs slutsatsen att den kompensation som behövs för motorerna för att få den riktiga hydrodynamiska kraften har liten påverkan reaktiv kontroll används och att det behövs en skyddande kondensator mellan ställdonsmotorn och strömförsörjningen för att skydda den mot bakström. Slutligen visade detta arbete hur effektiva HIL-system är för att utföra simuleringar för att testa och validera PTO-system i vågenergiomvandlare. Fördelarna är att man kan skapa representativ vågbelastning utan närvaro av vatten och med lätthet testa olika havstillstånd.
Hassan, Md Fuhad. "Experimental study of droplet actuation,splitting and particles manipulation using a cross scale digital microfluidics prototype." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44244.
Full textAlqhatani, Eid S., and Fahad A. Bin Huwaymil. "Analysis, design and implementation of a proof-of-concept prototype to support large-scale military experimentation." Thesis, Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/37579.
Full textFORCEnet Innovation and Research Enterprise (FIRE) is an enterprise computer-based solution developed to support large-scale experimentation in the Navy and Department of Defense. Every year, experiments are conducted such as Trident Warrior (TW) events to assess new capabilities developed to achieve FORCEnet concept. FIRE is also used to support experimentation in other projects and for other services. FIRE was built by the Naval Postgraduate School to provide the necessary tools for the coordination of the planning, execution and reporting of these experiments. Since its inception in 2003, FIRE has played an essential role in TW by empowering all stakeholders with the collaborative and management tools to perform tasks that were time-consuming and manpower-intensive in the past. However, a survey conducted a few years ago showed that FIRE lacks some required features and improvement in various areas needed to be considered. The objective of this thesis was to design, develop, and test a proof-of-concept prototype of an improved web-based application to support the coordination of large-scale experimentation to address the shortcomings of the old FIRE system. This was achieved by using the following: a modern design approach; the Model-View-Controller; a state-of-the-art framework; Oracle Application Development Framework; and powerful development tools such as Oracle JDeveloper and Oracle WebCenter.
Vardon, Philip James. "Three-dimensional numerical investigation of the thermo-hydro-mechanical behaviour of a large-scale prototype repository." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/54832/.
Full textEmilsson, Arvid, and Andreas Buhrgard. "Towards a prototype of a modular biogas system." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259579.
Full textInom den svenska jordbrukssektorn finns stor potential för utvidgning av biogasproduktionen. Det finns dock många problem med småskalig biogasproduktion, exempelvis olönsamma och energimässigt ineffektiva system. International Micro BioGas AB (IMB AB) har identifierat att detta till viss del kan bero på bristfälliga tekniska lösningar. Detta då det inte finns någon standardisering av teknik på området. IMB AB har, i samarbete med KTH, sedan 2014 arbetat med olika aspekter av småskalig biogasproduktion. Detta arbete undersöker ett antal innovationer och koncept från IMB AB rörande biogassystem: - En ny metod för omrörning- En byggnad som återvinner värmen från rötkamrarna (byggnadskonceptet)- Ett nytt sätt att isolera rötkamrarna (huvkonceptet)- Småskaliga och modulära paketlösningar Innovationerna och koncepten ovan utvärderas från ett energitekniskt, ekonomiskt och miljömässigt perspektiv genom en fallstudie på mjölkgården Ogestad nära Gamleby i Sverige. Två användningsområden för biogasen analyseras. I Fall 1 (Case 1) bränns rågasen i en kraftvärmeanläggning för att producera elektricitet och värme. I Fall 2 (Case 2) uppgraderas rågasen till fordonsgaskvalitet som sedan säljs till marknaden. Resultaten visar att den nya omrörningsmetoden är lovande ur ett energiperspektiv och enrekommendation är att gå vidare med tekniken och göra experimentella studier. Byggnadskonceptet och huvkonceptet visade likvärdiga resultat ur energitekniskt och miljömässigt perspektiv. Byggnadskonceptet konstaterades vara ineffektivt ur ett ekonomiskt perspektiv. Kostnadsreduceringen som uppnås genom att systemet är modulärt och därmed kan produceras i stor skala till olika gårdsstorlekar, är signifikant. Det krävs dock en stor investering från företagets sida. För samtliga fall är systemens lönsamhet starkt beroende av Jordbruksverkets subvention på 40 % av investeringskostnaden och utan den ökar företagetsinvesteringsbehov drastiskt. Med svenska förutsättningar är småskalig produktion av fordonsgas det mest lönsamma samt mest fördelaktiga ur ett miljö- och energiperspektiv.
Lemarenko, Mikhail [Verfasser]. "The Belle II DEPFET Pixel Vertex Detector : Development of a Full-Scale Module Prototype [[Elektronische Ressource]] / Mikhail Lemarenko." Bonn : Universitäts- und Landesbibliothek Bonn, 2013. http://d-nb.info/104527643X/34.
Full textHidajat, Ivan. "A prototype of a full-scale SCADA system installation using an operator training simulator module as power grid." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-196218.
Full textThe Operator Training Simulator (OTS) aims to help power system operators to improve their proficiency of the power system behavior in the current increasing complexity of the control system. Many power utility companies have integrated the OTS into their SCADA system (Walve & Edstrom, 1998) (Demjen, Kadar, Meszaros, & Szendy, 1994) for training purposes. There is no exception for ABB’s; they integrated the OTS into their Network Manager SCADA/EMS system, and it is the main tool for this project. However, the ABB’s SCADA/OTS suffers from incomplete real SCADA properties, e.g., PCU and RTU, due to its sandbox nature. Consequently, it does not realistically represent the full properties and functionalities of an actual SCADA system. To address this issue, an alternative approach for OTS integration to the SCADA has been proposed. The work started with an exploration of the current ABB’s SCADA/OTS with an analysis of its deviations to an actual SCADA control system. After a preliminary stage that involved testing and studying SCADA/OTS’s workflow, the work continued with creating alternative solutions to eliminate the deviations between the two systems. Then, the core work of the project involved implementation and testing the new alternative prototype since there is a possibility that KTH and/or ABB will use the simulator for a future project. To finalize the work, the prototype’s functionality, network architecture, communication protocols and data flow were examined and compared with the actual SCADA to evaluate the quality of the design. The results of the evaluation showed that the prototype was a good representation of a real SCADA system.
Serwon, Daniel Morrow. "Comprehensive Manual for a Sweeping Gas Membrane Distillation Prototype and Design of a Field Scale Solar Nanofiltration Membrane Desalination Facility." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/613597.
Full textWhitcomb, Bryan D. "Design and implementation of a high-power resonant DC-DC converter module for a reduced-scale prototype integrated power system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA430967.
Full textThesis Advisor(s): Robert W. Ashton, John G. Ciezki, Todd R. Weatherford. Includes bibliographical references (p. 175-177). Also available online.
Lindqvist, Sheila. "Evaluation of User Interface to Improve Documentation within the Elderly Care System." Thesis, Linnéuniversitetet, Institutionen för datavetenskap och medieteknik (DM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-98503.
Full textRatovonkery, Julie. "DYNABIOSOL : Conception bio-inspirée d'une enveloppe solaire Photovoltaïque dynamique aux fonctionnalités évolutives." Electronic Thesis or Diss., Chambéry, 2023. http://www.theses.fr/2023CHAMA027.
Full textClimate change, growing energy demand and depletion of fuel resources have led to increasingly high energy and environmental ambitions. These ambitions aim for resilient, sustainable, zero carbon and positive energy buildings in the building sector. Radical innovation in building envelope technologies is paramount as it is a key element in building energy efficiency. Indeed, the envelope is often designed on the basis of static functionalities rather than an adaptive and multifunctional interface. However, in the latter case, it would interact with and benefit from the effects of its external environment to ensure a comfortable indoor environment and the production of the building operating energy.In this context, this thesis consists in the design of an adaptive facade with integrated photovoltaic (PV) components. The adaptive functionalities are developed to improve both the thermal performance of the facade and the electrical production of the PV modules. Designing such an envelope element often requires complex mechanical and control systems to implement dynamic and adaptive functionalities. For this reason, we have chosen to adopt a bioinspiration approach and use smart materials to achieve flexible and low-tech adaptation mechanisms.The methodology involves the analysis of the thermal and electrical behaviour of a standard photovoltaic facade. In our case, it comprises bifacial PV modules, a ventilated air gap and a multilayer wall. The principle is to identify the properties limiting that facade to static functionalities. From this step, biological mechanisms related to the identified properties, and that can overcome the limitations are explored. Afterwards, smart materials enabling to implement the bioinspired strategies are selected. Finally, the outline of the new concept is developed with the principles involved. The solution is validated through experimental studies on the samples of the selected materials and on a reduced-scale prototype of the facade. Numerical feasibility studies and energy performance analysis at the building scale are also carried out.The developed solution consists in the application of thermosensitive and reflective bilayer components on the wall behind the PV modules. Those components are thin rectangular slats applied opposite to the PV cells. When the temperature rises, they gradually bend. Their cyclic deformation allows the adjustment of the facade functionalities according to three principles. First, in summer, the PV facade is cooled by shading the wall and dissipating heat through the increased thermal surface exchange in the air gap. Second, in winter, solar thermal energy is harvested by closing the air gap or recovering preheated air. Finally, the bilayers enhance the PV power output because of their high reflection of the irradiance to the backside of the bifacial PV modules. The experimental and numerical studies have validated the potential of the design to improve building energy efficiency, especially for increasing yearly electricity production and thermal performance in summer
Laffont, Charlotte. "La conception du logement à l’expérience des sonorités – COLEXSON : Un prototype construit pour expérimenter à échelle 1 les ambiances sonores de demain depuis un logement ventilé naturellement." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALH014.
Full textIn architectural and urban theories and practices, in building regulations and labels, sound is approached primarily as a source of noise and nuisance, against which housing must be insulated. Despite this fact, repeated reports of a lack of sound quality in living spaces have revealed the inadequacy of this approach, and the need for complementary tools to address sound design.How can we introduce listening into the design of multi-family housing so that it meets the challenges of tomorrow's city and contributes to a good quality of life? Do intermediate spaces, located between the private and public spheres, play a major role in everyday perceptions? What can we learn from users' experience of sound in built architectural forms that might be of interest to future city listening?To answer this question, we're going to look at three categories of intermediate spaces in historic and contemporary architectural forms : transitional spaces (hall, inner courtyard, etc.), outdoor spaces around dwellings (shared terrace, roof, balcony, etc.) and the envelope of the building (double skin, window).To imagine the sounds of the city and housing in post-carbon urbanity, we're going to look at the sounds of sociability, the sounds of the natural landscape, technological sounds and the sounds of mobility. Looking ahead to a city with many climatic hazards, we imagine a diversity of uses and cultures, mixed-use programming, soft mobility (hybrid and electric motors in particular), proximity enhanced by density. With heatwaves on the horizon, we need to start thinking about ways on how cooling our homes. How can we live in density with the sounds of the outside world ? How can we cool a home with natural ventilation, while at the same time modulating the listening experience ?This thesis, carried out under an A.N.R.T.-C.I.F.R.E. contract within the B.E.T. LASA, is linked to the A.A.U.-CRESSON laboratory and the "Habitat of the Future" research chair. We are convinced of the importance of experimentation in answering all these questions and integrating the listening experience into the practice of architecture. That's why, throughout this work, we'll be experimenting with concrete tools that can be grasped by those involved in a project. An analysis of a project in Villeurbanne (69), the « macro-lot B », will be carried out in the early design phases to anticipate its sound ambiances and the listening modulations it could bring. The design of a 1:1 scale prototype of ECHASON - ECHAfaudage SONore - will be intended to experiment with its future environment of a naturally ventilated dwelling and from its intermediate spaces. As the project could not be carried out to its maximum size, two prototypes of natural ventilation systems incorporating sound filtration were built and tested with the project's actors. Several soundtracks anticipating the intermediate spaces of macro-lot B were tested with future residents of the project. The results led to the drafting of three specifications for integrating the sound dimension into future architectural and urban planning competitions. The quality of the sound environment must be integrated into housing design in the same way as concerns about sunlight, air quality and summer comfort. This represents a social, economic and health issue. In this perspective, this work defends the idea of designing housing through listening, not anymore in a defensive or corrective way, but rather in a creative and committed way
Toews, Leslie Marilyn. "The Development of a Monolithic Shape Memory Alloy Actuator." Thesis, University of Waterloo, 2004. http://hdl.handle.net/10012/871.
Full textClabby, Darragh. "Wave energy conversion at prototype and model scales." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.673795.
Full textJolibois, Alexandre. "A study on the acoustic performance of tramway low height noise barriers: gradient-based numerical optimization and experimental approaches ( Étude de la performance acoustique des écrans antibruit de faible hauteur pour le tramway : optimisation numérique par méthode de gradient et approches expérimentales)." Thesis, Paris Est, 2013. http://www.theses.fr/2013PEST1116/document.
Full textNoise has become a main nuisance in urban areas to the point that according to the World Health Organization 40% of the European population is exposed to excessive noise levels, mainly due to ground transportation. There is therefore a need to find new ways to mitigate noise in urban areas. In this work, a possible device to achieve this goal is studied: a low-height noise barrier. It consists of a barrier typically less than one meter high placed close to a source, designed to decrease the noise level for nearby pedestrians and cyclists. This type of device is studied both numerically and experimentally. Tramway noise barriers are especially studied since the noise sources are in this case very close to the ground and can therefore be attenuated efficiently. The shape and the surface treatment of the barrier are optimized using a gradient-based method coupled to a 2D boundary element method (BEM). The optimization variables are the node coordinates of a control mesh and the parameters describing the surface impedance. Sensitivities are calculated efficiently using the adjoint state approach. Numerical results show that the shapes generated by the optimization algorithm tend to be quite irregular but provide a significant improvement of more than 5 dB (A) compared to simpler shapes. Utilizing an absorbing treatment on the source side of the barrier is shown to be efficient as well. This second point has been confirmed by scale model measurements. In addition, a full scale low height noise barrier prototype has been built and tested in situ close to a tramway track in Grenoble. Measurements show that the device provides more than 10 dB (A) of attenuation for a close receiver located at the typical height of human ears. These results therefore seem to confirm the applicability of such protections to efficiently decrease noise exposure in urban areas
Mohammed, Abba-Gana. "Experimental comparison of brickwork behaviour at prototype and model scales." Thesis, Cardiff University, 2006. http://orca.cf.ac.uk/56088/.
Full textJolibois, Alexandre, and Alexandre Jolibois. "A study on the acoustic performance of tramway low-height noise barriers : gradient-based numerical optimization and experimental approaches." Phd thesis, Université Paris-Est, 2013. http://pastel.archives-ouvertes.fr/pastel-00965168.
Full textMeredith, James D. C. (James Douglas Charles). "Design, construction and testing of an ocean renewable energy storage scaled prototype." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70437.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 95-96).
The concept for a new form of pumped storage hydro is being developed within the Precision Engineering Research Group at MIT: the Ocean Renewable Energy Storage (ORES) project. Large, hollow concrete spheres are created, fitted with a reversible pump-turbine and deployed to the sea floor. Water is then allowed to flow through the turbine, into the sphere, to produce power and power is stored back in the device by running the turbine backwards as a pump and evacuating the sphere. The first prototype of that concept is presented here. A land-based system was designed, built and tested to demonstrate its ability to store energy and test the viability of the manufacturing methods planned. The device was successfully built and cycled, storing 2Wh of energy. The round-trip efficiency of the device was severely affected by the low efficiency of the scaled down rotating equipment. It was also found that casting a monolithic sphere is preferable to assembling multiple pieces and that the interior of the sphere should be maintained at atmospheric pressure via a vent line.
by James D. C. Meredith.
S.M.
Šlajchrt, Zbyněk. "Object Morphology—A Protean Generalization of Object-Oriented Paradigm." Doctoral thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-264276.
Full textTricard, Thibault. "Procedural noises for the design of small-scale structures in Additive Manufacturing." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0065.
Full textThe democratization of AM has sparked a renewed interest in its potential applications.Among these, the ability to print small-scale structures is particularly promising:The geometry of internal small-scales structures directly influences the physical properties of the final parts.Thus, finding novel small-scales structures producing specific target properties expands the possibilities offered to additive manufacturing users,unlocking new potential applications in soft-robotics, for the design of prosthetics and orthoses, and for mechanical engineering at large.However, to be helpful in the wild, these small-scale structures have to expose controls over the properties they trigger --and allow their variation in space -- so as to adapt their behavior to the user's intent.Interestingly, this type of spatial control over properties has been extensively studied in Computer Graphics,in particular for texture synthesis.The objective of this thesis is to enable the same type of spatial control that is achieved by texture synthesis methods,for the synthesis of small-scale structures in Additive Manufacturing.In particular, I focused on defining strongly oriented small-scale structures.These trigger extremely anisotropic properties within the parts, a type of behavior that has not been extensively covered in prior works.To achieve this, I proposed to revisit the procedural formulations developed for texture synthesis in Computer Graphics,where each subpart of a pattern can be computed independently, only following local information.I successfully applied this approach to the generation of complex, oriented small-scale structures in large volumes.My first contribution is a novel approach for efficiently synthesizing highly contrasted oscillating patterns, that allows to closely follow property fields such as orientation and density while still being computed locally.I demonstrated this approach for texturing applications as well as for the synthesis of strongly oriented, anisotropic multi-material small-scale structures. This first method generates patterns that exhibit local defects, and therefore my second contribution extended this work to formulate a low-cost, efficient regularization technique that rectifies the oscillations.This led to the synthesis of freely orientable, self-supporting structures that can be used to trigger programmed deformations in 3D printed objects.My third contribution explores how to use a similar approach to define trajectories in fully filled 3D printed parts, under orientation objectives.By adjusting the phase of the oscillations, we are able to break the spatial alignments along the build direction that would otherwise result in local weaknesses in the produced parts
Amarir, Amine. "Pre-assessment of the Impact of Design Challenge Fabrication Modality on Engineering Self-Efficacy." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103906.
Full textMaster of Science
In project-based learning courses, students work in groups to make a prototype or other solution to a stated problem, which are helpful for building student confidence in problem-solving, critical thinking and, especially, engineering skills. This confidence translates to believing that carrying out a specific task will lead to success with little-to-no feelings of fear or failure. This generally describes "self-efficacy," and it can apply to any profession. Traditionally, hands-on projects are done in person, where an exchange of ideas is clear and any problems can be handled immediately. However, with schools closed due to the COVID-19 pandemic, these courses had to shift online, leading some to believe that students would not receive the same level and quality of engineering education. Online learning has been around for over 30 years and studies show that students learn just as much, if not more and better, online than sitting in a classroom. Can the same be said for taking part in an engineering project over the internet? Two groups designed a prototype drone attachment, where members of one group worked side-by-side to build and test their solution, while members of the other group worked online and sent files and assembly instructions to a third party. Each participant also filled out a questionnaire before and after the challenge to track their engineering self-efficacy. The limited data led to the conclusion that there is a noticeable difference between the two project completion methods, most likely caused by a low number of participants. The lessons learned from this study were used to create guidelines for a larger-scale study.
Di, Fabrizio Vincenzo. "Modellazione e analisi non lineare del degrado artificiale di un prototipo di edificio in muratura in scala reale." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Find full textRomagnoli, Roberto, and ROBERTO ROMAGNOLI. "Aerogeneratori eolici ad asse verticale: analisi numerica, verifica sperimentale e messa a punto di un campo di prova per prototipi full-scale." Doctoral thesis, Università Politecnica delle Marche, 2013. http://hdl.handle.net/11566/242724.
Full textThis work is focused on drag driven vertical axis wind turbines. The study involved both experimental measurements and numerical analyses. The two methods are complementary: CFD analyses allow us gain an insight into the rotor's fluid dynamics that lead to energy production. The experimental measurements allow us to evaluate the elements that are difficult to put inside a numerical model. For this reason the two approaches have different aims. The experiments have been performed in a closed circuit wind tunnel. They investigate the configurations that could improve the performance of a given rotor. The numerical analyses were conducted to improve the flow field knowledge and to design new rotor's geometries. Both approaches started from a classic Savonius rotor equipped with semi-circular straight blades S-shaped, with end plates to replicate the two-dimensional effects of the numerical model. The performance were evaluated with CP-lambda plots, where CP is the Power coefficient and lambda is the rotation velocity versus wind speed ratio. The best experimental configuration correspond to the reference rotor with conveyor and deflector: its CP max was 0.3, with +25% gain with the respect of the reference rotor. CFD analyses have shown two best geometries: the classical Savonius without the central shaft and a new geometry defined as “reversed profile”. They have both a CP maximum around 0.29 without any external appendices. Finally an external test station was build up to perform experimental measurements on full-scale small wind turbines models. It is composed by a test station for prototypes, a 10 meters meteorological mast and a Sodar-Rass station. It was found that the site is characterized by local breezes blowing most of the year and a prevailing direction of 330 degrees. The external station is operational and an urban lamppost prototype supplied by wind energy and is currently the subject of experimental studies.
Sahare, Swapnil Ashok. "Enhancing the Photovoltaic Efficiency of a Bulk Heterojunction Organic Solar Cell." TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1609.
Full textNapoli, Valeria Rossella. "Dimensionamento ed efficienza del convertitore di energia ondosa SEAWAVE SLOT-CONE GENERATOR. Studio per una installazione a scala di prototipo in Italia." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amslaurea.unibo.it/314/.
Full textDANIELSSON, ELLEN, and CHRISTOPHER LEKSTRÖM. "Investigation and Optimization of Small-Scale Fecal Management : As a product from dry toilet solutions in off-grid Swedish holiday homes." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299334.
Full textI fritidshus som saknar kommunalt avlopp behövs alternativa toalettlösningar. Det finns en rad olika torra toalettsystem, där urinsorterande och förbränningstoaletter är vanliga lösningar. Urinsorterande torrtoaletter kräver att användaren själv tar hand om genererade fekalier. Detta görs genom antingen privat latrinkompostering eller kommunal hämtning av latrin. I detta projekt undersöks fekaliehantering för fritidshus i Sverige från tre perspektiv genom att (1) studera biologiska fenomen i en kompost och hur en kompost ska hanteras för att få en rik humus, samt minimera växthusgasutsläpp som bildas vid just kompostering, (2) undersöka användarupplevelsen vid hantering av latrinkomposter idag, samt (3) kartlägga nuvarande system för latrinhantering, inklusive rådande lagar och förordningar. Målet med projektet var att utveckla ett användarvänligt koncept för fekaliehantering från urinsorterande toaletter, baserat på denna forskning. Projektet genomfördes i samarbete med Harvest Moon, ett företag som arbetar med att utveckla innovativa och estetiskt tilltalande torrtoalettsystem. Projektet inleddes med att studera litteratur, undersöka befintliga fekaliehanteringssystem, samt att intervjua komposteringsexperter och forskare inom området. Efter denna bakgrundsforskning kunde slutsatsen dras att det inte finns en perfekt komposthantering, då det beror på de mål som användaren har. Forskningen visade också att ju mer man vände kompostmassan, desto mer ökade utsläppen av ammoniak (NH3), dock minskade bildningen av metan (CH4). En annan insikt var att biokol kan tillsättas för att lufta, samt hjälpa till att hygienisera kompostmassan, då det binder till sig till exempel hormonrester. Gällande komposteringsmetoder så är en statisk passivt luftad kompost inte den snabbaste processen, men den leder till minst kompostreduktionen, vilket är bra om målet är att använda det komposterade materialet som jordförbättrare. Dessutom kräver det den minsta hanteringen av användaren. Denna metod valdes därför för vidareutveckling av slutkoncept. Slutligen, eftersom både temperatur och fukt lätt går att mäta med sensorer, så ansågs det intressant att implementera dessa typer av sensorer i ett slutkoncept i och med att det skulle kunna underlätta hanteringsprocessen för användaren. För att säkerställa att det slutliga konceptet skulle återspegla vad användarna behöver och önskar, inleddes sedan en fas av användarstudier. Användarstudierna visade att användare i allmänhet ser latrinkompost mer som något de måste ta hand om, än som en resurs, och har därmed inget intresse av att ta vara på det materialet som har komposterats. Studierna visade också att på grund av att många kommuner kräver två års lagring av materialet i fekaliekomposten, upplevde användare svårigheter med att få till en bra rutin kring hanteringen, vilket bidrog till att hela latrinhanteringssystemet fungerade sämre. Det tredje perspektivet som undersöktes inom projektet var hur systemen för latrinhantering ser ut idag, samt hur och av vilka lagar de regleras. Varje kommun har egna krav på hur en latrinkompost ska hanteras. Dessa krav är baserade på Miljöbalken, liksom Naturvårdsverkets rekommendationer gällande den praktiska implementeringen av Miljöbalken. Utöver sammanställningen av dessa regelverk visade studien att pyrolys, alternativt centralisering av hygieniserade fekalier, skulle kunna vara framtida alternativ till kompostering eller kommunal hämtning av latrin. Men på grund av den korta Time-to-Market för denna produkt, samt projektets begränsade tidsram ansågs produktutveckling mot systeminnovation vara orealistisk inom detta projekt. Insikter från dessa tre perspektiv bildade ett ramverk för konceptutvecklingsfasen, som avslutades med byggandet av en fullskalig funktionsprototyp. Under detaljutvecklingen fortsattes utvecklingen av konceptet i CAD. Det slutgiltiga konceptet som presenteras i projektet är en modulär, användarvänlig latrinkompost som går att anpassa till att följa olika kommunala regler. Den har en inre struktur som luftar kompostmaterialet för att minska bildandet av metangas. Strukturen består av hexagonalt perforerat syrafast stål. Komposten har en push latch mekanism på locket tillsammans med två gasfjädrar, vilket gör det enkelt att öppna eftersom användaren endast behöver trycka locket för att det ska öppnas. Temperatur- och fuktsensorer gör det lättare för användaren att hantera sin kompost korrekt, och en främre dörr möjliggör ergonomisk tömning av färdigt kompostmaterial. Framtida utveckling för att minska produktionskostnaderna, förenkla konstruktionen, vidareutveckla CAD-modellen, hitta lämpliga sensorer, utveckla användarinstruktioner, samt genomförandet av användartester med funktionsprototypen bör vidare undersökas.
Napoli, Maria Teresa. "Analisi del funzionamento e dell'impatto ambientale di un convertitore di energia ondosa di tipo Wave Activated Body. Studio per l'installazione a scala di prototipo a Nissum Bredning." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amslaurea.unibo.it/301/.
Full textWillschütz, H. G. "Thermomechanische Modellierung eines Reaktordruckbehälters in der Spätphase eines Kernschmelzunfalls." Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-28520.
Full textWillschütz, H. G. "Thermomechanische Modellierung eines Reaktordruckbehälters in der Spätphase eines Kernschmelzunfalls." Forschungszentrum Rossendorf, 2006. https://hzdr.qucosa.de/id/qucosa%3A21677.
Full textArchez, Julien. "Formulations de composites à base de liants basse température type géopolymère à base d'argilite et de différents renforts : réalisation d'une pièce par fabrication additive." Thesis, Limoges, 2020. http://aurore.unilim.fr/theses/nxfile/default/bd491a52-1855-4e0d-9b5b-6284748bb761/blobholder:0/2020LIMO0059_arch.pdf.
Full textThis work is part of the Cigéo project (geological industrial disposal for radioactive wastes) and focuses on studying alternative materials for the elaboration of the lining of the high-level radioactive waste storage cells. Composites materials with inorganic matrix and reinforcements are one of the innovations being considered as an alternative to replace metallic materials in the lining. The use of geopolymers reinforced with inorganic elements could meet the desired specifications. The insertion of wollastonite and glass fibers to a geopolymer matrix allowed to control viscosity suitable for shaping by casting and additive manufacturing while ensuring the mechanical strength of the consolidated material. This allows obtaining flexural and compressive strengths going up to 101 MPa and 20 MPa, respectively. To shape the extruded solution at a half scale, a 3D printing system was then developed. A specific extrusion head has been designed and integrated into a 6-axis robotic cell. The control and identification of printing and materials parameters make it possible to control the process and to print geopolymer composite structures at half scale (ɸ = 35 cm)
Jaber, Jana. "Application de la fabrication additive à la modélisation physique des joints et des massifs rocheux, par approches expérimentales et numériques." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0071.
Full textThis thesis presents a study of the application of additive manufacturing (known as 3D printing) to rock mechanics. It is part of a larger project aimed at building a 2m3 physical model of an explicit discontinuous rock mass, whose behaviour is mainly controlled by discontinuities. The 3DP technology adopted in this work is selective laser sintering, and the material is Polyamide 12. First, we present the experimental results of the mechanical characterization of artificial rock joints constructed by 3DP. Two joint families are tested. The first is characterized by a fixed aperture (0,4mm), a simplified geometry (planar or sawtooth), and containing rock bridges. The mechanical characterization shows that these joints exhibit a mechanical behavior similar to that of natural rock joints under shear tests, with a cohesion driven by the rock bridges, and a friction angle which depends on the angle of the asperities. The second family consists of joints with more realistic roughnesses, to which a JRC value, commonly used to describe natural joints, can be assigned. Again, experimental results show the potential of artificial joints to reproduce the mechanical behavior of natural joints, and to respect the Barton-Bandis criterion. Experimental studies are coupled with numerical modeling, using the UDEC software, to define the appropriate model that reproduces the experimental results, and to calibrate the mechanical parameters of both joints type. After defining different artificial joints with controlled parameters, cylindrical samples (16 x 32 cm) containing two and eight planar discontinuities with rock bridges are printed and tested under uni-axial compression. This is a first attempt at an explicitly discontinuous physical model containing joints with controlled mechanical behaviour. The mechanical behavior of these samples highlights the influence of discontinuities in controlling the global behavior and resistance of rock masses. The results are then compared to a numerical modeling under 3EDC. Finally, scaling laws are applied to the previous results. The application of scale factors to the experimental results shows the possibility of representing natural rock mass and rock joints with artificial 3DP joints (SLS technique) up to a scale factor on metric dimensions of 1/25
Andrade, Bruno Miguel Costa de. "PLACM - Prototype Large-Scale Accessibility Compliance Monitoring." Master's thesis, 2020. http://hdl.handle.net/10451/47988.
Full textCom o aumento da modernização da sociedade, a Internet já se transformou numa ferramenta utilizada todos os dias por milhões de pessoas. Mas com esta magnitude, nem todos os serviços ou aplicações disponíveis na web são acessíveis para todos. Estima-se que cerca de um quinto da população da União Europeia tem algum tipo de incapacidade, quer física, cognitiva, visual ou auditiva. Com esta percentagem significativa, é importante que a web forneça alternativas acessíveis, de modo a incluir o máximo de cidadãos, promovendo a independência dos mesmos e contribuindo para uma maior equidade social. A W3C desenvolveu um conjunto de recomendações para desenvolvedores web que desejam tornar o seu conteúdo acessível, sendo já consideradas como o padrão a seguir em legislações internacionais. Porém, por serem difíceis de interpretar, foi criado o projeto WAI-Tools, no qual um dos objetivos principais é o desenvolvimento de regras claras e reproduzíveis, focadas nas recomendações mencionadas. Com estas regras, é despoletada a harmonização dos resultados, ferramentas e métodos de avaliação de acessibilidade. Um outro objetivo do projeto foi a criação de um formato único de resultados de testes de acessibilidade, permitindo que várias ferramentas possam estruturar da mesma maneira os seus resultados. Um último objetivo, e foco deste trabalho, era o desenvolvimento de uma plataforma de monitorização de conformidade de acessibilidade em grande-escala onde, com a conciliação das regras desenvolvidas e o formato normalizado dos resultados daí originados, fosse possível agrupar informação de várias ferramentas e entidades e incentivar a uma constante melhoria e apreço pela acessibilidade digital. Para alcançar este objetivo, foi realizado um levantamento de requisitos de plataformas de monitorização existentes, dentro e fora do âmbito de acessibilidade, identificando as suas necessidades e funcionalidades comuns. Tendo em conta este estudo, e pareceres de alguns parceiros do projeto europeu, foi desenhado um modelo de dados e estruturados os tipos de navegação, e correspondentes vistas gráficas, apropriados aos dados a monitonizar. Depois do processo de implementação da plataforma, foram realizados testes com utilizadores para verificar se a plataforma apresentava problemas de usabilidade, e, por fim, realizadas alterações tendo em conta os resultados dos testes.
With the increasing modernization of processes in society, the Internet has already become a tool used by millions of people every day. Despite this magnitude, not all services or applications available on the web are accessible to everyone. It is estimated that about a fifth of the population in the European Union has some kind of disability, whether physical, cognitive, visual or hearing. With this significant percentage, it is important that the web provides accessible alternatives, in order to include as many citizens as possible, promoting their independence and contributing to greater social equity. The W3C has developed a set of recommendations for web developers who want to make their content accessible and are already considered to be the standard to follow in international legislation. However, as they are difficult to interpret, theWAI-Tools project was created, in which one of the main objectives is the development of clear and reproducible rules, focused on the mentioned recommendations. With these rules, the harmonization process of results, tools and methods for assessing accessibility is triggered. Another objective of the project was to create a standardized format for accessibility test results, allowing several tools to structure their results in the same way. A final objective, and focus of this dissertation, was the development of a large-scale accessibility compliance monitoring platform where, with the conciliation of the developed rules and the standardized format of the results resulting from it, it should be possible to group information from various tools and entities and encourage constant improvement and appreciation for digital accessibility. To achieve this goal, a survey of requirements for existing monitoring platforms was carried out, both within and outside the scope of accessibility, identifying their common needs and features. Taking this survey into account, and the opinions of some partners of the European project, a data model was designed and the types of navigation appropriate to the data to be monitored, and corresponding graphical views, were structured. After the platform implementation process, tests were carried out with users to check if the platform had usability problems, and, finally, changes were made considering the results of these tests.
Ireland, Sean S. "Characterization and implementation of a UV/O₃ pilot-scale prototype for disinfecting and recycling poultry chiller wastewater." 2004. http://purl.galileo.usg.edu/uga%5Fetd/ireland%5Fsean%5Fs%5F200412%5Fms.
Full textDuncan, William F. A. (William Frederick Alexander), and Al Mattes. "Field scale prototype anaerobic/wetlands cells for removing heavy metals from water leaching from a historical capped landfill." 1999. http://hdl.handle.net/2429/9632.
Full textSea, Li-Ming, and 施力銘. "The Embedded Platform Prototype Design And Development For Small Scale Electric Toy Product Based On Raspberry Pi System." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/hu87n3.
Full text國立臺灣科技大學
電子工程系
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The Raspberry Pi is developed by the British Raspberry Pi Foundation and is a series of small computer systems suitable for embedded platform development. The hardware central operating SoC components of this series of systems are based on the current mainstream ARM architecture. The software part is based on Linux as the operating platform. In the environment in which the author works, there are more and more SoC solutions like this that are used by engineers. This thesis is based on this popular embedded system, trying to develop a variety of small electronic toy prototypes, including: bicycle wheel rotation display device, infant-specific kaleidoscope projection music box and pet-specific ball-throwing toy electric car, and attempted in the development of these toy prototypes, the relevant core knowledge systems are summarized. The goal of this paper is to try to sort out the highly reusable embedded firmware framework and the highly reusable software components in the prototype development of this type of product based on the core knowledge summarized in the development process.
Beeny, Bradley Aaron 1988. "Thermal Hydraulic Analysis of a Reduced Scale High Temperature Gas-Cooled Reactor Test Facility and its Prototype with MELCOR." Thesis, 2012. http://hdl.handle.net/1969.1/148182.
Full textKlein-Miloslavich, Andreas. "Modeling, simulation, hardware development, and testing of a lab-scale airborne wind energy system." Thesis, 2020. http://hdl.handle.net/1828/11508.
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Silva, Manuela Corrêa Alves. "Stress-strain response of soft soils stabilised with alkali activated industrial by-products." Doctoral thesis, 2021. http://hdl.handle.net/1822/75516.
Full textAlternative binders based on the alkaline activation technology have been strongly investigated over the last decades as a potential replacement for Portland Cement. However, little research has been devoted to the shear behaviour of soft soils stabilised with those type of binders and their numerical modelling using constitutive models. This PhD thesis aims to deepen the knowledge in this area through the characterisation of the short- and long-term shear behaviour of soft soils stabilised with alkali-activated binders and the numerical modelling of the stress-strain behaviour of these geomaterials using a advanced constitutive model. In this context, triaxial tests were undertaken, after 28 and 90 curing days, in both a sandy lean clay and clay with high water content at reconstituted and stabilised states using alkali-activated blast furnace slags. The impact of the stress-history, represented by the overconsolidation ratio, and stress-state, represented by the initial mean effective stress, were investigated. Oedometer and isotropic consolidation tests were also undertaken. Scanning electron microscopy with energy dispersive spectroscopy, x-ray powder diffraction and leachate analyses were carried out to investigate the nature of the binding phases formed and the risk of contamination of soils. The results were used to calibrate an advanced kinematic hardening constitutive model proposed by Rouainia and Muir Wood, 2000 for natural clays. It was the first attempt of using this constitutive model in artificially cemented soils. Additionally, the opportunity to be integrated within a research project related to the application of alkali-activated industrial wastes in situ allowed me to be deeply involved in constructing a full-scale prototype of a (sub)base layer stabilised with alkali-activated binders and conventional binders. Big challenges arose, including the definition of a construction methodology, equipment selection, on-site handling of distinct materials, quality control techniques, among others. The in situ performance of the stabilised geomaterials was assessed through falling weight deflectometer tests, plate load field tests and unconfined compressive strength tests after 36 and 90 days. For each layer, it was estimated the financial cost of the construction and the equivalent CO2 emissions. The work showed the feasibility of the on-site application of alkali-activated binders in the stabilisation of soil layers in the context of transport infrastructures.
Os ligantes alcalinos têm sido fortemente investigados nas últimas décadas como um potencial substituto do cimento Portland. Contudo, o comportamento ao corte de solos estabilizados com este tipo de ligantes é ainda uma área pouco explorada atualmente, juntamente com o uso de modelos constitutivos. A presente tese de doutoramento visa aprofundar o conhecimento existente nesta área, através da caracterização do comportamento ao corte de solos moles estabilizados com ligantes alcalinos a curto e longo prazo e a modelação numérica do comportamento tensão-extensão desses geomateriais utilizando um modelo constitutivo avançado. Nesse contexto, foram realizados ensaios triaxiais, ensaios edométricos e de consolidação isotrópica, numa argila magra arenosa e numa argila com alto teor em água, ambos no estado reconstituído e estabilizado com escórias de alto-forno ativadas por álcalis, aos 28 e 90 dias de cura. O impacto do grau de sobreconsolidação, representado pela razão de sobreconsolidação, e do estado de tensão in situ, representado pela tensão média efetiva inicial, foram investigados no comportamento ao corte desses geomateriais. Foram realizadas análises de microscopia eletrônica de varrimento com espectroscopia de energia dispersiva e difração de raios-X e testes de lixiviados para investigar a natureza dos géis formados e o risco de contaminação dos solos. Os resultados foram utilizados na calibração de um modelo constitutivo de endurecimento cinemático proposto por Rouainia and Muir Wood, 2000 para argilas naturais que, até ao momento, não tinha sido utilizado em solos artificialmente cimentados. Adicionalmente, a oportunidade de estar integrada num projeto de investigação relacionado com a construção à escala real de uma camada de (sub)base estabilizada com ligantes alcalinos e ligantes convencionais possibilitou-me enveredar por esta temática. Grandes desafios foram encontrados do longo deste projeto, entre os quais, a definição de uma metodologia de construção, a seleção de equipamentos, manuseio dos materiais in situ, definição dos ensaios de controle de qualidade, etc. O desempenho in situ dos geomateriais estabilizados foi avaliado através de ensaios de capacidade de carga com defletómetro de impacto, ensaios de carga em placa e de compressão uniaxial aos 36 e 90 dias. Para cada camada foram também estimados os custos financeiros de construção e as emissões de CO2 equivalentes. Este projeto mostrou a viabilidade de utilização local dos ligantes alcalinos para a estabilização de camadas de solo no contexto das infraestruturas de transporte.
Fundação para a Ciência e a Tecnologia (FCT)
This research work was co-financed by the European Social Fund (FSE) through the Northern Regional Operational Program
PALOMBA, VALERIA. "Thermal energy storage systems for low-grade heat applications: Design and experimental testing of lab-scale prototypes." Doctoral thesis, 2017. http://hdl.handle.net/11570/3116364.
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