Dissertations / Theses: 'Heap games'

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Paris, Gabrielle. "Resolution of some optimisation problems on graphs and combinatorial games." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1180/document.

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J'ai étudié trois problèmes d'optimisation dans les graphes et les jeux combinatoires.Tout d'abord, les codes identifiants dans les graphes où les sommets font faces à des failles: les codes cherchent à repérer les failles pour les réparer. On s'est intéressé aux codes identifiants dans les graphes circulants en utilisant des plongements de ces graphes dans des grilles infinies.Ensuite, j'ai étudié le jeu de marquage de sommets et le jeu de coloration d'arêtes: ici deux joueurs se font face, le premier cherche à construire une coloration correcte (ou un marquage correct) et le deuxième cherche à l'en empêcher. Pour le jeu de marquage on s'est intéressé aux changements de stratégie gagnante lorsqu'on modifie le graphe. Pour le jeu de coloration d'arêtes on a donné une stratégie gagnante pour le premier joueur pourvu que le graphe considéré admette une certaine décomposition sur les arêtes. On améliore notamment des résultats sur les graphes planaires.Enfin j'ai étudié les jeux à tas purement de casse: deux joueurs à tour de rôle prennent un tas et le cassent en un certain nombre de tas non vides. On s'intéresse aux stratégies gagnantes lorsque les joueurs jouent sur un unique tas contenant n jetons. Ces jeux de pure casse semblent, à l'oeil nu, être réguliers. On a montré que c'est effectivement le cas pour certains et on a donné un test qui permet de déterminer la régularité cas par cas. Un seul cas ne semble pas correspondre à cette régularité: son comportement reste un mystère.En conclusion, je me suis intéressé à trois problèmes bilatéraux qui utilisent différentes méthodes et qui remplissent des propos différents dans le domaine de la combinatoire
I studied three optimization problems on graphs and combinatorial games.First, identifying codes were studied : vertices couteract faults. Identifying codes help locate the fault to repare it. We focused on circulant graphs by embedding them on infinite grids.Then, the marking and the coloring games were studied : two player games were one player wants to build something (a proper coloration or a proper marking) and the other wants to prevent the first player from doing so. For the marking game we studied the evolution of the strategy when modifying the graph. For the coloring game we defined a new edge-wise decomposition of graphs and we defined a new strategy on this decomposition that improves known results on planar graphs.In the end, I studied pure breaking games : two players take turns to break a heap of tokens in a given number of non-empty heaps. We focused on winning strategies for the game starting with a unique heap on n tokens. These games seem, on first sight, to be all regular : we showed this is the case for some of them and we gave a test to study one game at a time. Only one of these games does not seem to be regular, its behavior remains a mystery.To sum up, I studied three bilateral problems that use different methods and have different purposes in combinatorics

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2

Moregård, Daniel. "Heat Maps : En metod för att uvärdera banor." Thesis, Högskolan i Skövde, Institutionen för kommunikation och information, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-6357.

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Denna rapport har undersökt om game metrics genom heat maps kan användas för att hitta en choke point i en bana gjord till spelet Team Fortress 2. Game metrics och kvantitativa metoder erbjuder ett objektivt och nästan automatiserat alternativ till kvalitativa metoder när det kommer till balansering. En bana har konstruerats med en choke point och har speltestats för att generera en heat map. För att undersöka om det går att hitta en choke point med hjälp av en heat map så har en enkät gjorts där respondenter bads hitta choke pointen med hjälp av den heat mapen som genererades från speltestningen av banan. Alla respondenter lyckades hitta mitten av choke pointen med hjälp av heat mapen. I framtiden skulle arbetet kunna utökas genom att undersöka om användandet av bottar eventuellt skulle helt kunna automatisera balanseringsprocessen. Det skulle också gå att undersöka hur olika klasser rör sig i en bana.

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Hayes, Mark. "The effect of progressive heat acclimation on games players performing intermittent-sprint exercise in the heat." Thesis, University of Brighton, 2014. https://research.brighton.ac.uk/en/studentTheses/5d460be8-1826-4a96-ac35-9c07c6943e6d.

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Intermittent-sprint performance is reduced in hot environments and the impairment occurs without significant difference in metabolic responses to exercise. Reductions in cerebral blood flow and voluntary activation occur with hyperthermia and neuromuscular impairment has been posited to explain decreased performance in the heat. Heat acclimation is used to minimise heat mediated performance impairment, yet traditional protocols may limit adaptation. The purpose of this thesis was to examine the efficacy of a novel progressive heat acclimation model for games players performing intermittent-sprint exercise in the heat and to examine if this method can ameliorate neuromuscular fatigue following exercise of this type.

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Hong, Daomin. "Kinetic model of heat conduction in molecular gases." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286969.

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5

Andersson, Anders Tobias. "Facial Feature Tracking and Head Pose Tracking as Input for Platform Games." Thesis, Blekinge Tekniska Högskola, Institutionen för kreativa teknologier, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-12924.

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Modern facial feature tracking techniques can automatically extract and accurately track multiple facial landmark points from faces in video streams in real time. Facial landmark points are deﬁned as points distributed on a face in regards to certain facial features, such as eye corners and face contour. This opens up for using facial feature movements as a handsfree human-computer interaction technique. These alternatives to traditional input devices can give a more interesting gaming experience. They also open up for more intuitive controls and can possibly give greater access to computers and video game consoles for certain disabled users with diﬃculties using their arms and/or ﬁngers. This research explores using facial feature tracking to control a character's movements in a platform game. The aim is to interpret facial feature tracker data and convert facial feature movements to game input controls. The facial feature input is compared with other handsfree inputmethods, as well as traditional keyboard input. The other handsfree input methods that are explored are head pose estimation and a hybrid between the facial feature and head pose estimation input. Head pose estimation is a method where the application is extracting the angles in which the user's head is tilted. The hybrid input method utilises both head pose estimation and facial feature tracking. The input methods are evaluated by user performance and subjective ratings from voluntary participants playing a platform game using the input methods. Performance is measured by the time, the amount of jumps and the amount of turns it takes for a user to complete a platform level. Jumping is an essential part of platform games. To reach the goal, the player has to jump between platforms. An ineﬃcient input method might make this a diﬃcult task. Turning is the action of changing the direction of the player character from facing left to facing right or vice versa. This measurement is intended to pick up diﬃculties in controling the character's movements. If the player makes many turns, it is an indication that it is diﬃcult to use the input method to control the character movements eﬃciently. The results suggest that keyboard input is the most eﬀective input method, while it is also the least entertaining of the input methods. There is no signiﬁcant diﬀerence in performance between facial feature input and head pose input. The hybrid input version has the best results overall of the alternative input methods. The hybrid input method got signiﬁcantly better performance results than the head pose input and facial feature input methods, while it got results that were of no statistically signiﬁcant diﬀerence from the keyboard input method. Keywords: Computer Vision, Facial Feature Tracking, Head Pose Tracking, Game Control
Moderna tekniker kan automatiskt extrahera och korrekt följa multipla landmärken från ansikten i videoströmmar. Landmärken från ansikten är deﬁnerat som punkter placerade på ansiktet utefter ansiktsdrag som till exempel ögat eller ansikts konturer. Detta öppnar upp för att använda ansiktsdragsrörelser som en teknik för handsfree människa-datorinteraktion. Dessa alternativ till traditionella tangentbord och spelkontroller kan användas för att göra datorer och spelkonsoler mer tillgängliga för vissa rörelsehindrade användare. Detta examensarbete utforskar användbarheten av ansiktsdragsföljning för att kontrollera en karaktär i ett plattformsspel. Målet är att tolka data från en appliktion som följer ansiktsdrag och översätta ansiktsdragens rörelser till handkontrollsinmatning. Ansiktsdragsinmatningen jämförs med inmatning med huvudposeuppskattning, en hybrid mellan ansikstdragsföljning och huvudposeuppskattning, samt traditionella tangentbordskontroller. Huvudposeuppskattning är en teknik där applikationen extraherar de vinklar användarens huvud lutar. Hybridmetoden använder både ansiktsdragsföljning och huvudposeuppskattning. Inmatningsmetoderna granskas genom att mäta eﬀektivitet i form av tid, antal hopp och antal vändningar samt subjektiva värderingar av frivilliga testanvändare som spelar ett plattformspel med de olika inmatningsmetoderna. Att hoppa är viktigt i ett plattformsspel. För att nå målet, måste spelaren hoppa mellan plattformar. En inefektiv inmatningsmetod kan göra detta svårt. En vändning är när spelarkaraktären byter riktning från att rikta sig åt höger till att rikta sig åt vänster och vice versa. Ett högt antal vändningar kan tyda på att det är svårt att kontrollera spelarkaraktärens rörelser på ett eﬀektivt sätt. Resultaten tyder på att tangentbordsinmatning är den mest eﬀektiva metoden för att kontrollera plattformsspel. Samtidigt ﬁck metoden lägst resultat gällande hur roligt användaren hade under spelets gång. Där var ingen statisktiskt signiﬁkant skillnad mellan huvudposeinmatning och ansikstsdragsinmatning. Hybriden mellan ansiktsdragsinmatning och huvudposeinmatning ﬁck bäst helhetsresultat av de alternativa inmatningsmetoderna. Nyckelord: Datorseende, Följning av Ansiktsdrag, Följning av Huvud, Spelinmatning

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6

Hawker, Philip. "A heat pulse study of two dimensional electron gases." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277937.

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7

Horn, Thomas J. "Comparison of heat flux standards for calibrating heat flux gages at elevated temperatures and high heat flux levels." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06162009-063032/.

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MORENO, Felipe Servilha. "A cooperação design de games e neurociência como estratégia à superação do cybersickness." Universidade Anhembi Morumbi, 2018. http://sitios.anhembi.br/tedesimplificado/handle/TEDE/1715.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
The technological evolution of HMDs is responsible for making devices available that are lighter, cheaper and more operational, as well as being aware of the risks of cybersicness. Cybersickness involves a range of symptoms similar to those of motion sickness, which affects a significant number of users and is currently regarded as one of the main obstacles to virtual reality helmets in the market. The focal point of this dissertation is on merging the fields of knowledge of Neuroscience and Games Design as a strategy for mitigating the symptoms of cybersickness. It sets out the results obtained from an experiment carried out with two groups of volunteers – heavy and low users of games for HMDs. These results underpin the sensory rearrangement theory and point out the kind of design choices that can trigger the symptoms of cybersickness. As a result, it is becoming possible to design games by predicting the design decisions required to overcome the problem of this malady.
A evolução tecnológica dos HMDs é responsável por disponibilizar aparelhos mais leves, baratos e funcionais, bem como pela visibilidade do cybersickness. O cybersickness consiste em um conjunto de sintomas semelhantes à cinetose, que afeta um percentual expressivo dos usuários e se configura atualmente como um dos maiores impeditivos à consolidação dos capacetes de realidade virtual no mercado. Esta dissertação enfoca a cooperação entre os campos de conhecimento da Neurociência e do Design de Games como estratégia à redução dos sintomas do cybersickness. Apresenta e discute resultados obtidos em experimento realizado com dois grupos de voluntários, heavy user e low user de jogos para HMDs. Tais resultados reforçam a teoria do rearranjo sensorial e apontam as escolhas de design que desencadearam os sintomas de cybersickness. Com isso, passa a ser possível ao designer de games antever decisões projetuais capazes de contribuir à superação do cybersickness.

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9

Witter, Jeffrey Bruce. "Convection of magma in volcanic conduits as a degassing mechanism at active volcanoes /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/6721.

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10

Jun, Byung Soon. "Measurement of thermal accommodation coefficients of inert gas mixtures on a surface of stainless steel /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3025627.

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11

Hoffie, Andreas Frank. "Convection Calibration of Schmidt-Boelter Heat Flux Gages in Shear and Stagnation Air Flow." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/31422.

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This work reports the convection calibration of Schmidt-Boelter heat flux gages in shear and stagnation air flow. The gages were provided by Sandia National Laboratories and included two one-inch diameter and two one-and-one-half-inch diameter Schmidt-Boelter heat flux gages. In order to calibrate the sensors a convection calibration facility has been designed, including a shear test stand, a stagnation test stand, an air heater and a data acquisition system. The current physical model for a combined radiation and convection heat transfer environment uses an additional thermal resistance around the heat flux gage. This model clearly predicts a non-linear dependency of the gage sensitivity over a range of heat transfer coefficients. A major scope of this work was to experimentally verify the relation found by the model assumptions. Since the actual heat sink temperature is not known and cannot be measured, three different cases have been examined resulting in three different sensitivities for one pressure value, which is the gage sensitivity for the not cooled case and the gage sensitivity for the cooled case, based on the plate temperature or on the cooling water temperature. All of the measured sensitivities for shear as well as for stagnation flow fit well in the theory and show the non-linear decay for increasing heat transfer coefficient values. However, the obtained data shows an offset in the intersection with the sensitivity at zero heat transfer coefficient. This offset might arise from different radiation calibration techniques and different surface coatings of test gage and reference standard.
Master of Science

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Kato, Brigitta Andrea, and Lisa Derman. "Problematic gaming habits, perceived stigma and help-seeking behavior among gamers." Thesis, Linköpings universitet, Institutionen för kultur och samhälle, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-167722.

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Exaggerated gaming is a rising issue both in Sweden and internationally that has a negative effect on many lives. It can be a cause of isolation which leads to various social consequences. It can cause economic problems due to large amounts of money being spent on games or in-game purchases or because of prioritizing gaming before going to work or studying. Excessive gaming has been categorized as a disorder/addiction since mid-2018 by the World Health Organisation based on reviews done on the available evidence and consensus among experts from different disciplines. However, there are not a lot of studies regarding the kind of help that is available as well as how likely those that have gaming disorder seek help nor are there many studies about stigma around the phenomenon. The aim of our study was to investigate if perceived stigma has any effect on whether or not and to what extent people who have problematic gaming habits decide to seek help as well as where they turn, should they have gaming disorder. We also want to see if problematic gaming habits increase the level of perceived stigma. Our hypotheses were therefore the following: H1: the more someone’s gaming habits are close to those of someone with a gaming disorder, the higher the perceived stigma becomes around the phenomenon. H2: the greater the perceived stigma is, the less likely a person is to seek help for their problem H3: the greater the perceived stigma, the less likely a person is to turn to professionals for help. We constructed a survey and distributed it on forums that discuss gaming related issues hoping to reach as many gamers as possible and we got a total of 177 responses. After having done the analysis in SPSS, our result showed that there was a weak positive correlation between problematic gaming habits and perceived stigma. We also found that the level of perceived stigma did not influence whether they would seek help or not. When it came to seeking help from professionals, we found statistically significant data relating to stigma and seeking professional help in that the higher the perceived stigma was, the more likely the individual was to seek professional help.

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Phuoc, Tran Xuan. "Ignition of polymeric material under radiative and convective exposure." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/18399.

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Hughes, Leigh A. "Video games help to prepare girls for a competitive future in STEM: An analysis of how video games help to build visual-spatial skills and the positive influence early childhood gaming can have on girls." Kent State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent1480345885015147.

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Huang, Chao-Ming. "Experimental study of pressure difference phenomena in rarefied gases /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9812957.

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16

Brown, Ashlie M. "Improved thermal energy utilization through coupled and cascaded cooling cycles." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31645.

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Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2010.
Committee Chair: Dr. Srinivas Garimella; Committee Member: Dr. Samuel Graham; Committee Member: Dr. Sheldon Jeter. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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SAMUDRA, SAMEER D. "KINETIC THEORY APPROACH TO PLASMA HEAT TRANSFER." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin990028080.

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Tasker, M. "The effect of heat transfer on the dispersion of cold dense gases." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379994.

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Lattimer, Brian Y. "Floating head skin friction gage measurements in supersonic flows." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06302009-040312/.

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Shi, Yong. "Lattice Boltzmann models for microscale fluid flows and heat transfer /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?MECH%202006%20SHI.

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Tuma, Juergen. "The enhancement of heat transfer to gases in longitudinal flow in tube bundles." Thesis, University of Brighton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280462.

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22

Cress, Ronald. "Turbine Blade Heat Transfer Measurements in a Transonic Flow Using Thin Film Gages." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34207.

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Experimental heat transfer data has been collected at engine representative conditions in this work to use in future work to improve computational models. Tests were carried out in a transonic cascade wind tunnel with the data collected using thin film gages. All of the necessary development to use the thin film gages has been completed, including construction of electronics and analysis tools to reduce the data. Gage installation and calibration techniques have been successfully implemented for the current research facility and those procedures have been documented. Heat transfer tests were carried out at engine design speed as well as conditions both above and below design speed. The resulting effect of different Reynolds numbers on heat transfer has been studied and the data collected has been compared with computer predictions, analytical correlations, and data from other published literature to validate the results obtained.

Finally, it has been shown that a transient analysis technique can be used to process the data for gages that do not exhibit steady results during the quasi-steady test run. This transient technique resulted in data that agrees well with published literature and analytical correlations.

Master of Science

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El, Sabea Hassan. "Field measurements evaluation and modeling of CO2 heat pump for residential building (Gamen 12)." Thesis, KTH, Energiteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-253825.

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Carbon dioxide, as a natural refrigerant, is safe and environment-friendly. It is also an economic refrigerant which can be utilized in residential heat pumps. Analysis has been done to evaluate the performance of the CO2 heat pump in Gamen 12 (Skrapan) in the Sodermalm area, owned by Vasakronan; which is a real estate company. The building satisfies its heating needs through connecting to the district heating network. Furthermore, the CO2 heat pump was installed to recover the available high- potential- waste energy from the building. The evaluation starts with one year of field measurements of an existing system (May 2017 to May 2018). Additionally, quality control and a revision of the data are essential to have the most accurate values. The use of necessary equations is then followed to estimate and establish the critical parameters to the heat pump's performance. For instance, some of the essential parameters include temperature and pressure. In this study, a numerical model was used to present four different scenarios which handle the parameters that impact the performance of the heat pump. These scenarios also aim to improve the system for future installations. The results show that the performance of the heat pump can be improved by 16% and 14% respectively when the outlet gas-cooler temperature and the evaporation temperature are optimized. The best performance of the system is achieved when the outlet gas-cooler temperature decreased, and the evaporation temperature increased simultaneously. This change yielded to the best optimal value, which is up to 30% higher than the previous performance. Another scenario was created for future installations. In this scenario, it was assumed that the heat pump consists of three gas coolers, two of which were utilized for heating domestic water while the third one was used for space heating. Results showed that the new installed scenarios were economically promising and yielded in better performance of the system. Finally, an economic assessment was adopted in this study which showed cost-saving effect at a specific running capacity of the system; 8% of the total cost which equal to 168 000 SEK was saved annually when the heat pump runs at average capacity 54%. After applying the suggested improvements, the savings will be higher and would reach 218 000 SEK annually and the capacity of the heat pump reaches 70%, which is equal to 11% of the total cost of providing heating to the building.
Koldioxid, som ett naturligt kylmedel är säkert och miljövänligt. Det är också ett ekonomiskt kylmedel som kan användas i bostadsvärmepumpar. Analys har gjorts för att utvärdera uppförandet av CO2-värmepumpen i Gamen 12 (Skrapan) i Södermalmområdet, och vasakronan äger denna byggnad; vilket är ett fastighetsbolag. Byggnaden uppfyller sina värmebehov genom att ansluta till fjärrvärme . Vidare installerades CO2-värmepumpen för att återvinna den tillgängliga högspänningsavfallsenergin från byggnaden. Utvärderingen börjar med ett år av fältmätningar från maj 2017 till maj 2018 av ett befintligt system. Dessutom är kvalitetskontroll och revision av data väsentliga för att få de mest exakta värdena. Därefter följs användningen av nödvändiga ekvationer för att uppskatta och fastställa parametrar som är kritiska för värmepumpens prestanda. Exempelvis inkluderar några av de väsentliga parametrarna temperatur och tryck. Vidare användes i en studie en numerisk modell för att presentera fyra olika scenarier som hanterar de parametrar som påverkar värmepumpens prestanda. Scenarierna syftar också till att förbättra systemet för framtida eller liknande installationer. Resultaten visar att värmepumpens prestanda kan förbättras med 16% respektive 14% när utloppsgaskylstemperaturen och indunstningstemperaturen optimeras. Systemets bästa prestanda uppnås när utloppsgaskylstemperaturen sjönk och förångningstemperaturen ökade samtidigt. Denna förändring gav det bästa optimala värdet, vilket är upp till 30% högre än tidigare prestanda. Ett annat scenario skapades för den framtida installation. I detta scenario antogs att värmepumpen består av tre gaskylare, varav två kommer att användas för uppvärmning av hushållsvatten medan den andra används för rymmeuppvärmning. Resultaten visade att den nya installationen lovar ekonomiska resultat och ger bättre prestanda i systemet. Slutligen antogs en ekonomisk bedömning i den här studien och det genomförde resultatet av kostnadsbesparingar med en specifik Kapacitet hos systemet som är 168000 SEK / år och motsvarar 8% av den totala kostnaden som resultaten visade. Efter att ha tillämpat de föreslagna förbättringarna kommer besparingarna att bli högre och uppgå till 218000 SEK / år vilket motsvarar 11% av den totala kostnaden för uppvärmning till byggnaden.

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Mattiasson, Jesper, and Dongsheng Lu. "How does Head Mounted Displays affect users' expressed sense of in-game enjoyment." Thesis, Uppsala universitet, Institutionen för informatik och media, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-202692.

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In recent years, the rapid development of new head-mounted display technology (HMDs) for gaming provides usage opportunities for the mass market. A kickstarter project initiated by a well-known HMD developer Oculus Rift inspired our study. The main purpose of this study was to find out how a HMD will affect user’s expressed level of enjoyment. The method utilized in this study was a quantitative research method based on a research experiment. The thesis reports on a comparative study, in which the same game is played both with and without a HMD. Based on the analysis of our collected data, the results showed that playing games with a HMD does really give a boost in user’s enjoyment level. This may seem as a reasonable conclusion because the HMDs can provide the user with a more realistic and completely immersive in-game environment. Unfortunately there were some limitations in our study, one of the most crucial one was that the hardware was outdated, which significantly affected the reliability of the test results. For future prospects, it is recommended to use a more modern setup to acquire more reliable results, as well as optimizing the experience for the users.

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Hout, Joseph J. "Identification of compounds formed during the low temperature heat dispersal of o-chlorobenzylidene malononitrile (CS riot control agent) /." Download the thesis in PDF, 2006. http://www.lrc.usuhs.mil/dissertations/pdf/Hout2006.pdf.

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Tuncgenc, Bahar. "The Understanding Of Normativity And Free Will In Games: A Developmental Study On 2- And 3-year-old Turkish Children." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614309/index.pdf.

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This study investigated the understanding of normativity and free will from a developmental perspective. Being a new field of investigation, there is not much research conducted which points to different aspects of normativity. Current study, therefore, aimed to assess Turkish children&rsquo
s normative development on a sample of 2 and 3 years old in the context of games. It was expected, first, that children would show more protest when there is a norm violation. Moreover, older children would show more normative protest than younger ones. The results confirmed these hypotheses. In a second study, it was investigated whether the actor&rsquo
s being free to act as s/he wills versus constrained so that cannot act otherwise had an effect on children&rsquo
s protest in response to norm violations. It was hypothesized that a decrease in normative reactions and an increase in help responses would be observed. No age effect for help responses was expected. The results of this study did not reveal any decrease in normative reactions, but there was an increase in help responses regardless of the age.

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Kock, Elina, and Yamma Sarwari. "How can machine learning help identify cheating behaviours in physical activity-based mobile applications?" Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20791.

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Den här studien undersöker möjligheten att använda sig utav Human Activity Recognition (HAR) i ett mobilspel, Bamblup, som använder sig utav fysiska rörelser för att upptäcka om en spelare fuskar eller om denne verkligen utför den verkliga aktiviteten. Sensordata från en accelerometer och ett gyroskop i en iPhone 7 användes för att samla data från olika människor som utförde ett antal aktiviteter utav intresse. Aktiviteterna som är utav intresse är hopp, knäböj, stampa och deras fuskmotsvarigheter, fuskhopp, fuskknäböj och fuskstampa. En sekventiell modell skapades med hjälp av det öppna programvarubiblioteket, TensorFlow. Feature Selection gjordes i programmet WEKA (Waikato Environment for Knowledge Analysis), för att välja ut attributen som var mest relevanta för klassificeringen. Dessa attribut användes för att träna modellen i TensorFlow, vilken gav en klassificeringsprecision på 66%. Fuskaktiviteterna klassificerades relativt bra, och det gjorde även stampaktiviteten. Hopp och knäböj hade lägst klassificeringsprecision med 21.43% respektive 28.57%. Dessutom testades Random Forest klassificeraren i WEKA på vårt dataset med 10-delad korsvalidering, vilket gav en klassifieringsnoggranhet på 90.47%. Våra resultat tyder på att maskininlärning är en stark kandidat för att hjälpa till att identifiera fuskbeteenden inom fysisk aktivitetsbaserade mobilspel.
This study investigates the possibility to use machine learning for Human Activity Recognition (HAR) in Bamblup, a physical activity-based game for smartphones, in order to detect whether a player is cheating or is indeed performing the required activity. Sensor data from an accelerometer and a gyroscope from an iPhone 7 was used to gather data from various people performing a set of activities. The activities of interest are jumping, squatting, stomping, and their cheating counterparts, fake jumping, fake squatting, and fake stomping. A Sequential model was created using the free open-source library TensorFlow. Feature Selection was performed using the program WEKA (Waikato Environment for Knowledge Analysis), to select the attributes which provided the most information gain. These attributes were subsequently used to train the model in TensorFlow, which gave a classification accuracy of 66%. The fake activities were classified relatively well, and so was the stomping activity. Jumping and squatting had the lowest accuracy of 21.43% and 28.57% respectively. Additionally, the Random Forest classifier in WEKA was tested on the dataset using 10-fold cross validation, providing a classification accuracy of 90.47%. Our findings imply that machine learning is a strong candidate for aiding in the detection of cheating behaviours in mobile physical activity-based games.

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Kleut, Petar. "Recuperation of the exhaust gases energy using a Brayton cycle machine." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/76807.

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Lately, car manufacturers have been put to a big challenge to reduce the CO2 emission of their entire fleets. Norms of pollutant emissions limit the ways to achieve the desired CO2 emission goals, as some of the solutions that would lead to lower CO2 emission also lead to higher pollutant emission. Waste Heat Recovery (WHR) could be a good solution to lower the CO2 emission of the Internal Combustion Engine (ICE) without increasing the pollutant emission. In the present thesis different WHR strategies are analysed and the results suggested it would be interesting to further study the Brayton cycle machine. Air Brayton Cycle (ABC) represents a way to recover a part of the heat energy of the ICE exhaust gases and transform it into mechanical energy. Recovered mechanical energy would then be returned to the crankshaft of the ICE, thereby reducing the amount of energy that has to be liberated by combustion of fuel which lowers the fuel consumption and CO2 emission. The study of ABC started with an analysis of the ideal cycle in order to obtain the theoretical maximum of the system. The study continued with an analysis of the semi ideal cycle where all losses are taken into account only by two efficiency coefficients. This analysis showed that for the diesel engine efficiency of the ABC is very low because of the low exhaust gas temperature. For the gasoline engine the cycle could be viable when the ICE is working under steady condition and higher load. These conditions could be fulfilled when the vehicle is driven on the highway. Detailed analysis was aimed at determining the cycle main losses. They were determined to be: pumping losses, losses caused by heat transfer and mechanical losses. Taking into account these main losses along with other direct and indirect losses it was concluded that the cycle is not viable for the types of the WHR machines that were considered in this study. In order for the cycle to be viable some other either existing or new machine type should be tested, that would lower the main losses and offer good isentropic and mechanical efficiency for desired conditions.
Últimamente los fabricantes de automóviles se han puesto el gran reto de reducir la emisión de CO2 en la totalidad de sus flotas. Las nuevas normativas para la reducción de las emisiones contaminantes limitan los medios para lograr los objetivos deseados en la emisión de CO2 porque algunas de las soluciones que llevan a la reducción en la emisión de CO2 también dan lugar a un incremento en la emisión de otros contaminantes. La recuperación de calor residual (WHR) podría ser una buena solución para reducir las emisiones de CO2 del motor de combustión interna (ICE) sin poner en peligro la emisión de contaminantes. En la presente Tesis se analizaron diferentes estrategias de WHR y se concluyó que sería interesante estudiar más a fondo la máquina de ciclo Brayton. El Ciclo Brayton de Aire (ABC) permite recuperar una parte del calor de los gases de escape del ICE y transformar este calor en energía mecánica. La energía mecánica recuperada se devuelve al cigüeñal del ICE, reduciendo de ese modo la cantidad de energía que tiene que ser liberada por la combustión del combustible, lo cual permite reducir el consumo de combustible y las emisiones de CO2. En esta Tesis se estudia el ABC mediante un análisis del ciclo ideal con el fin de obtener el máximo teórico del sistema. El modelo se mejora con un análisis del ciclo semi-ideal donde se tienen en cuenta todas las pérdidas mediante el uso de dos coeficientes generales. Este análisis muestra que para el motor diesel la eficiencia del ciclo ABC es muy baja debido a la baja temperatura del gas de escape. Para el motor de gasolina el ciclo podría ser viable cuando el ICE está trabajando bajo condiciones estacionarias y una carga mayor. Estas condiciones se podrían cumplir cuando el vehículo está circulando en autopista. El análisis detallado de este ciclo tiene como objetivo determinar las pérdidas principales de ciclo. Las pérdidas principales se identificaron como: las pérdidas de bombeo, las pérdidas causadas por la transferencia de calor y las pérdidas mecánicas. Teniendo en cuenta estas pérdidas principales junto con otras pérdidas directas e indirectas, se concluyó que el ciclo no es viable para los tipos de máquinas WHR que fueron considerados en este estudio. Para que el ciclo sea viable se tiene que buscar alguna otra máquina existente o un nuevo tipo de máquina que reduzca las principales pérdidas y ofrezca un buen rendimiento isentrópico y mecánico para las condiciones deseadas.
Últimament els fabricants d'automòbils s'han posat el gran repte de reduir l'emissió de CO2 de la totalitat de les seues flotes. Les noves normatives de reducció de les emissions contaminants limiten els mitjans per assolir els objectius desitjats d'emissió de CO2 perquè algunes de les solucions que porten a la reducció en l'emissió de CO2 també donen lloc a un increment a l'emissió de altres contaminants. La recuperació de calor residual (WHR) podria ser una bona solució per reduir les emissions de CO2 del motor de combustió interna (ICE) sense posar en perill l'emissió de contaminants. En la present Tesi s'han analitzat diferents estratègies WHR i es va concloure que seria interessant estudiar més a fons el cicle Brayton. El Cicle Brayton d'Aire (ABC) representa una manera de recuperar una part de la calor dels gasos d'escapament de l'ICE i transformar calor a l'energia mecànica. L'energia mecànica recuperada es retorna al cigonyal de l'ICE reduint d'aquesta manera la quantitat d'energia que ha de ser alliberada per la combustió del combustible permitint la reducció del consum de combustible i les emissions de CO2. En aquesta Tesi s'ha començat estudiant un ABC amb una anàlisi del cicle ideal per tal d'obtenir el màxim teòric del sistema. Este model es millora amb una anàlisi del cicle semiideal on es tenen en compte totes les pèrdues amb tan sols dos coeficients d'eficiència. Aquesta anàlisi va mostrar que per al motor dièsel l'eficiència del cicle ABC és molt baixa a causa de la baixa temperatura del gas d'escapament. Per al motor de gasolina el cicle podria ser viable quan l'ICE està treballant sota condicions estacionàries i una càrrega més gran. Aquestes condicions es podrien complir quan el vehicle està circulant en autopista. L'anàlisi detallada del cicle va tenir com a objectiu determinar les pèrdues principals de cicle. Les pèrdues principals es van identificar com: les pèrdues de bombament, les pèrdues causades per la transferència de calor i les pèrdues mecàniques. Tenint en compte aquestes pèrdues principals juntament amb altres pèrdues directes i indirectes, es va concloure que el cicle no és viable per als tipus de màquines WHR que van ser considerats en aquest estudi. Perquè el cicle puga ser viable s'ha de buscar alguna altra màquina existent o un nou tipus de màquina que puga reduir les principals pèrdues i puga oferir un bon rendiment isentròpic i mecànic per a les condicions desitjades.
Kleut, P. (2016). Recuperation of the exhaust gases energy using a Brayton cycle machine [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/76807
TESIS

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Wang, Siyuan. "A SERIOUS GAME PROTOTYPE BASED ON STUDY TRAINING EMOTION REGULATION TO HELP COLLEGE STUDENTS REDUCE ACADEMIC PROCRASTINATION : Take ‘Cat Clinic’ as a case." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-20018.

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Academic procrastination is a common phenomenon among contemporary college students. This behavior seriously affected the graduation, physical and mental of college students. Playing games is a kind of procrastination behavior, which refers to short-term happiness through games and avoiding the pain caused by academic writing. The purpose of this article is to help students pay attention to using idle games to regulate emotions to reduce the frequency of academic writing procrastination. In terms of game design, the game type chosen is idle games. The study used the method of emotion regulation skill trend chart to divide the procrastinators into two groups for the experiment. The conclusion is that serious games based on learning emotion regulation can help procrastinators to improve their emotion regulation skills and reduce the frequency of procrastination to a certain extent.

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30

Qin, Jianbo. "Experimental investigation of bubble behaviours in domestic heat pump water heating system." Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/17662.

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The growing awareness of global warming potential has internationally aroused interest and demand in reducing greenhouse gas emissions produced by human activity. Each year, the UK consumes a significant amount of energy for residential and industrial space heating and domestic hot water production. At present, gas boilers are mostly installed in the domestic water heating which contributes significantly to excessive CO2 emissions and consumption of primary energy resources. However, air-source heat pump system has higher performance efficiency comparing to the traditional gas boiler, which can reduce the carbon dioxide emission and the usage of primary energy resources. The coefficient of efficiency of the heat pump can be range from 2 to 4.5 in various situations. The market shares of heat pump have been predicted to increase in the coming years to meet the requirement of the European Union Commission. There were about 22,000 heat pumps set up in the UK with 18 percent growth comparing to 2016 as reported by BSRIA. A range from 0.6 to 5.7 million heat pumps are estimated by the National Grid to be set up by 2030 to increase the energy efficiency of the UK. Although the energy efficiency of the heat pump is extremely high, there is still a space for improvement in air-source heat pump water heating system. The performance of the heat pump water heating system can be further enhanced if the dissolved gases in its hot water circuit can be efficiently discharged. The undissolved bubbles can stack in a specific position of the radiator, which would cause the cold spot. This could immensely reduce the efficiency of the heat pump water heating system. To avoid this happening, the bubble behaviors in the heat pump water heating system need to be extensively investigated. The better understanding of the bubble behaviors in an air-source heat pump water heating system can contribute to the design of an air evacuation valve and heat pump piping systems. In this thesis, the effects of various heat pump hot water side parameters on gas microbubble diameters and bubble productions were measured and analyzed by varying different experimental conditions. Correspondingly, a summarized conclusion has been presented to predict the gas microbubble's diameter distributions and volumetric void fraction distributions at different operating conditions. These parameters include various system pressures, water flow rates, and saturation ratios. In this thesis, the main results showed that larger average bubble diameter is at the higher water flow rates at heat pump exit. At 2.2 bar condition, when system water flow rate increased from 800 l/h to 1150 l/h, the average bubble diameter increased from 0.086 mm to 0.108 mm. Moreover, the average bubble diameters increase along with the decrease in system pressures. At 1000 l/h condition, when system pressure increased from 2.2 bar to 2.7 bar, the average bubble diameter decreased from 0.100 mm to 0.087 mm. At 850 l/h condition, when system pressure increased from 1.7 bar to 2.5 bar, the average bubble diameter decreased from 0.101 mm to 0.081 mm. In addition, the average bubble diameters slightly increase along with the increase in saturation ratio. Besides, a prediction equation for the bubble diameter distribution in the water pipe was proposed. At SR 1.15 and 2.5 bar condition, when water flow rate increased from 900 l/h to 1100 l/h, volumetric void fraction decreased from 2.25 E-05 to 4.83 E-06. However, at 1000 l/h and SR 1.15 condition, when system pressure increased from 2.2 bar to 2.7 bar, volumetric void fraction decreased from 2.16 E-05 to 3.78 E-06. It is found that the highest city main saturation ratio was achieved at 1.07 at the specific environmental condition.

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Milkov, Nikolay. "Waste heat recovery from the exhaust gases of a diesel engine by means of Rankine cycle." Thesis, Paris, CNAM, 2017. http://www.theses.fr/2017CNAM1149/document.

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Cette étude est motivée par la protection de l'environnement et la réduction des émissions de CO2 émis par les moteurs à combustion interne. L'objectif de la thèse est d'étudier les possibilités de la réduction de la consommation de carburant d'un moteur diesel d’automobile grâce à la récupération de la chaleur des gaz d'échappement basée sur un cycle de Rankine. Afin de déterminer l'énergie perdue, le moteur a été testé sur un banc d’essais et les paramètres des gaz d’échappement ont été mesurés. Un modèle de simulation du moteur a également été développé et validé grâce aux résultats expérimentaux. Le potentiel de récupération de chaleur sur les gaz d’échappement et sur le refroidissement a été estimé. Cette analyse a révélé que le potentiel sur les gaz d’échappement est plus élevé que celui sur le refroidissement. Grâce au modèle numérique et aux essais, la puissance et l'efficacité du cycle de Rankine ont été étudiées. Enfin, l'impact du système de récupération d’énergie sur les performances du moteur a été analysé. Les résultats montrent que la puissance du moteur augmente de 4,3% au point de puissance maximale du moteur
This study is motivated by the environment protection and the reduction of emissions CO2 from internal combustion engines. The aim of the thesis is to study the possibilities of fuel consumption reduction of a diesel engine intended for a passenger car by means of waste heat recovery from exhaust gases based on thermodynamic cycle (Rankine cycle). In order to determine the waste heat, the engine was tested on a test bench as the exhaust parameters were measured. A simulation model of the engine has also been developed and validated by means of experimental results. The recovery potential of the exhaust gases and the cooling system has been estimated. This analysis revealed that the waste heat recovery potential of the exhaust gases is higher that the cooling sys-tem. By means of Rankine cycle numerical model and experimental test, the output power and efficiency of the Rankine cycle were studied. Finally, the impact of the heat recovery system on engine performance was studied. The results revealed that the engine power increases by 4.3% at the operating point which corresponds to the maximum engine power
Това изследване е мотивирано от опазването на околната среда и намаляването на емисиите на CO2 от двигателите с вътрешно горене. Целта на дисертацията е да проучи възможнос-тите за намаляване на разхода на гориво на дизелов двигател, предназначен за лек автомо-бил, чрез рекупериране на енергия с цикъл на Ранкин. За да се определи неоползотворената енергия в отработилите газове бе използван изпитателен стенд. Симулационен модел на двигателя е разработен и валидиран чрез експерименталните резултати. Направена е оценка на потенциала за рекупериране на енергия от отработилите газове и охладителната система. Този анализ показва, че потенциала за рекупериране е по-голям в изпускателната система. С помощта на експериментален стенд и числен модел на цикъла на Ранкин са установени мощността и ефективността на системата. Въздействието на системата за рекупериране на енергия е изследвано. Данните показват, че мощността на двигателя се увеличава с до 4,3%

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Ylitalo, Frida. "Development of digital sales processes with help of the See-Think-Do-Care model." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-185555.

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Digital commerce is a natural part of our everyday life. To fast and easily be able to make purchases from our home without stress has become a matter of course for us. But the new way to make purchases places new demands on the sales, not least at the important customer meeting. The interaction between customer and seller disappears completely and known marketing methods must be adapted to the new conditions. How does the customer journey change when the step from discovering a product to buying it is just a few clicks away? The study aims to investigate and develop a digital sales process for a mobile game aimed for children. The process is based on the marketing framework See-Think-Do-Care and tries to answer questions like which components are needed in a sales flow? How can a product be adapted to different types of users and can UX design be used to get interested customers to buy the product? The method is divided into two different sections. One section for evaluating the chosen marketing framework and another for the development of the sales process. The development of the sales process was made stepwise by prototypes in different degrees of fidelity. The first part of the result ended up in the implementation of the marketing framework, a developed customer journey, and a compilation of ten guidelines to adhere to for increasing the conversion of new customers. The sales flow was then developed step by step from only showing the routing to be a clickable solution similar to the intended end product. The di↵erent prototypes were evaluated by user testing and it was shown that the largest problem was not to make users understand the sales flow, it was to make them understand the actual product. The hope is that the result of the study will be able to be tested in production and be used in the real sales of the product.

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33

Campbell, David Scott. "Design and calibration of a rapid-response thin-film heat flux gage." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/104303.

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Moore, Gillian Lizbeth. "From head to tale : the circulation, display and representation of big-game material culture, c. 1870-1920." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/32476.

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Artefacts created from big game material proliferated during the period between 1870 and 1920 and, through their physical and metaphorical circulation as trophies, mementos, furnishings, garments, and personal accoutrements, became increasingly visible as they percolated from their predominantly elite genesis, into a multiplicity of public, domestic and civic spaces. This study seeks to discern the effect of their dissemination, showing how it impacted on the museum displays, domestic decor, fashionable dress and commodity culture of the era. It reflects the extensive representation of big game hunting, and its material effusions, in the text and images of the expanding periodical press, recognising the contribution of published sources to public reception of these artefacts and their developing role as commodities. My thesis aims to demonstrate that detailed examination of the varied and abundant artefacts which stemmed from big game hunting can offer valuable insights into the social and cultural history of the era and argues that this material's entanglement in Britain's imperial project is too significant to overlook. It contends that the transitions from nature to culture, which these objects illustrate, map the reach of the burgeoning Empire, and plot the dichotomies of late Victorian, and Edwardian, engagements with the natural world and subaltern nations. Scholarly work by John M. Mackenzie and Harriet Ritvo, in the mid 1980's, firmly established the relevance of the examination of material culture, within the contexts of animal studies and imperial history, as a fruitful field for academic research, arguing convincingly for further examination of its varied manifestations. However, a generation later, no comprehensive exploration of those elements appertaining to big game hunting has been attempted. Encouraged by the post-millennial 'material turn' in social history, identified by scholars including Bill Brown (2001), Erica Rappaport (2006) and Frank Trentmann (2009), my work draws on a wealth of contemporaneous factual sources including museum, exhibition and trade catalogues, fashion plates, unpublished correspondence, biographical material, museum records, archival sources and popular fiction, to explore the circulation and representation of big game material culture, during a long fin de siècle, and reveal its extensive influence. As a whole, this thesis seeks to offer a nuanced, detailed and holistic view of the visibility and affect of the material culture of big game hunting in the period.

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Spatuzzi, Antonio. "TRANSFER OF SPATIAL KNOWLEDGE IN A VIRTUAL ENVIRONMENT : Comparing the acquisition of spatial knowledge between head mounted displays and desktop displays." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-11591.

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This project starts with the idea to develop a game to train people in evacuation drills. The game has to allow people to learn evacuation plans. To do it, the core aspect to be considered is the transfer of spatial knowledge from a virtual environment. Hence in this study, the transfer of spatial knowledge has been evaluated. In particular, the acquisition from a virtual environment has been compared between head mounted display and desktop display. 26 subjects have participated in the experiment. They have been divided in two groups: the first group played the game with a desktop display, the second group played with a head mounted display. The collected data and feedback underline that it is possible to acquire spatial knowledge from a virtual environment, and that participants who used a desktop display obtain more nformation than participants who used head mounted display.

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Paiement, Bianca. "A Comparison of Brain Trauma Profiles Between Elite Men's Rugby Union 15s and Rugby Union 7s Game Play." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40589.

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Head impact and subsequent brain trauma is a concern in contact sports including rugby. Head collisions present acute and long term injury risks to the brain ranging from non-symptomatic, concussion, and neurodegeneration. Rugby Union 15s and Rugby Union 7s are the two most played codes of the sport and the physical and tactical differences may affect how brain trauma is experienced (Cunniffe, Proctor, Baker, & Davies, 2009; Colin W Fuller, Taylor, & Molloy, 2010; L. J. Suarez-Arrones, J. Nunez, Portillo, & Mendez-Villanueva, 2012). It is important to consider all parameters contributing to acute and long term injury risk in order to appropriately capture brain trauma experienced in a contact/collision sport (Karton & Hoshizaki, 2018). Impact frequency, frequency-magnitude, and interval between impact have all been reported to affect brain trauma. Trauma profiling is a method used to describe brain trauma using the variables relating to brain injury risk. The purpose of this study was to compare head impacts experienced in rugby union 15s and 7s using frequency of impact events, frequency-magnitude of brain deformation, and time interval between impacts. Thirty-six hundred (3600) player minutes of footage were analysed for each code, and all head impacts were categorised. Twenty (20) impact conditions were observed and reconstructed. Head to shoulder, hip and knee events were reconstructed using a pneumatic linear impactor, head to head events were reconstructed using a pendulum system, and head to ground events were reconstructed using a monorail drop rig. Results from both codes were compared using non-parametric Mann-Whitney U tests and demonstrated that Rugby 7s had a higher overall frequency of head impact, a greater number of head impacts causing higher trauma , and a shorter time interval between head impacts. These results suggest that rugby 7s presents a greater risk for sustaining brain trauma. These results will help expand the understanding of conditions leading to injury, and may lead to better interventions, such as equipment or rule changes, to mitigate risk.

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McNamara, David. "Comparison of a heated humidifier with a heat and moisture exchanger for conditioning the gases inspired by children with tracheostomies." Thesis, University of Auckland, 2009. http://hdl.handle.net/2292/6115.

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Background: Children with chronic tracheostomies should have the gases they inspire conditioned through warming and humidifying. The degree and most appropriate method of conditioning is debated. Methods: Two randomised cross-over studies with partial observer-blinding were conducted comparing the use of a heated humidifier (HH) to a heat and moisture exchanger (HME) during sleep: a short-term study involving 20 hours of each treatment and a long-term study involving ten weeks of each treatment. The short-term study was conducted to investigate immediate treatment difference and the long-term study to investigate whether short-term differences translated into long-term differences in major clinical outcomes. At the time of assessment children in the short-term study were wearing the assigned treatment whereas in the long-term study all children were wearing the HME. Children were assessed in both studies for changes on clinical examination, airway secretion characteristics, airway inflammatory cytokine levels and occurrence of clinical events. Children in the long-term study also underwent mucociliary clearance (MCC) scans via inhaled radioaerosol. A parallel qualitative interview study was incorporated into the long-term study as well as assessment of parental and child quality of life. Results: Fifteen children were enrolled in the short-term study. In this study children had improved clinical examination findings when treated with HH compared to HME for respiratory rate (p = 0.038), oxygen saturations (p = 0.012), retractions (p= 0.011), wheeze (p = 0.020) and summary examination score (p < 0.001). However, there was no difference in airway secretion characteristics, inflammatory cytokines or the frequency of required suctioning. Fourteen children were enrolled in the long-term study with two withdrawing prior to assessment. Fewer children in the long-term study had major clinical events (5 vs. 12, p =0.005) when treated with HH compared to HME with trends toward fewer experiencing acute respiratory admissions (1 vs. 5, p = 0.069) and chest infections (4 vs. 9, p = 0.061). No significant differences between treatments were observed for MCC scans, clinical examination, airway secretion characteristics, inflammatory cytokines or quality of life questionnaires. Interviews revealed how parents managed their child's health and balanced the difficulties of using technology against the benefits of treatment. Conclusion: The use of a HH compared to a HME resulted in short-term improvements in clinical examination findings and long-term improvements in the incidence of major clinical events.

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Olszewski, Tomasz [Verfasser]. "Oxidation mechanisms of materials for heat exchanging components in CO2/H2O-containing gases relevant to oxy-fuel environments / Tomasz Olszewski." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1026897246/34.

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Petrů, Lukáš. "Návrh dvoutlakého kotle na odpadní teplo za spalovací turbinu, 150 kg/s spalin, 600 °C." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231222.

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This master´s thesis deals with two pressure heat recovery steam generator behind gas turbine. From the entered parameters steam and gas were designed heating surfaces, specifically their size and configuration. The overall design is then proposed in the drawing.

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Pena, João Gustavo Coelho. "Otimização do sistema de distribuição de gases numa usina siderúrgica integrada." Universidade Federal do Espírito Santo, 2013. http://repositorio.ufes.br/handle/10/6204.

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Made available in DSpace on 2016-12-23T14:07:24Z (GMT). No. of bitstreams: 1 Raphael Mariano Macieira - Parte 1.pdf: 2082403 bytes, checksum: 0145a5a29417fe7c6d36a2a1417ff32b (MD5) Previous issue date: 2013-11-06
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
The production process in an integrated steel mill produces gases, which can typically be used as fuel by the plant itself. However, managing the distribution of combustible gases is a complex activity, mainly because of the imbalances between production and consumption profiles of gases, the capacity and operational constraints of gas accumulators, and the constraints to energy use in power plants. The objective of this work is to use mixed integer linear programming (MILP) as a formulation for the problem distributing gases in the integrated steel mill, and to solve the formulated MILP making use of an algorithm that was developed using the Branch and Bound technique together with the Simplex method. Finally, the case studies confirm that the model is able to find an optimal solution for the proposed problem
Nos processos para produção de aço em uma usina siderúrgica integrada são produzidos gases que normalmente podem ser aproveitados como combustíveis pela própria planta. Entretanto, gerenciar a distribuição destes gases combustíveis é uma atividade complexa, principalmente por causa dos desequilíbrios entre os perfis de produção e consumo dos gases, das limitações de capacidade dos acumuladores de gases e suas restrições operacionais, além das restrições para aproveitamento energético nas centrais termoelétricas. O objetivo deste trabalho é usar a programação linear inteira mista (MILP) como uma formulação do problema da distribuição de gases na usina siderúrgica integrada; e, para solucionar a MILP usar um algoritmo que foi desenvolvido usando a técnica Branch and Bound em conjunto com o método Simplex. Por fim, estudos de casos confirmam que o modelo é capaz de encontrar uma solução ótima para o problema formulado

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Sallot, Coleen Michelle. "Utilizing Play to Help Adopted Children Form Healthy Attachments." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1619193153362829.

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Han, Song. "Regional Energy Systems with Retrofitted Combined Heat and Power (CHP) Plants." Doctoral thesis, Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-15966.

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Fossil fuel depletion, economic development, urban expansion and climate change present tough challenges to municipal- and regional-scale energy systems. Regional energy system planning, including waste treatment, renewable energy supply, energy efficiency, and climate change, are considered essential to meet these challenges and move toward a sustainable society. This thesis includes studies on energy system from municipal waste, potential for a fossil fuel-independent regional energy system with increased renewable energy products using waste as one of energy sources, and the performance of biomass-fired combined heat and power (CHP) plants. A top-down method is adopted to organize the studies, from national waste-to-energy (WtE) scenarios to individual energy plants. The first study considers the overall potential contribution of WtE to energy supply and greenhouse gas (GHG) emissions mitigation in Sweden until 2050 under several different scenarios. Depending on WtE scenario considered, the study shows that WtE can supply energy between 38 and 186 TWh and mitigate between CO2 of 1 and 12 Mt per year by 2050 based on the baseline of year 2010. At a regional level, static and dynamic optimization models with a focus on WtE are developed for two regions in Sweden and Finland. The former is used to investigate the possibilities of optimal positioning of new energy plants, retrofitting existing energy plants and planting energy crops. The latter case study is on regional heat and power production using biogas generated from agricultural and livestock wastes. Centralized biogas production units perform better than distributed production regarding energy and carbon balance though the net energy output is negligible. However, a significant GHG emission can be reduced compared to the present status. Retrofitting existing conventional CHP plants is another option for improving regional energy system. The study shows that integrating heat-demanded processes such as drying, bioethanol and pellet production with existing CHP plants can improve overall energy efficiency and power output, increase annual operation time and reduce production cost as well as mitigate GHG emissions. It is recommended that building new WtE/energy plants at optimum sites, upgrading the existing energy plants, expanding the agricultural/forestry waste/residues output (biomass) and planting more energy crops shall be taken into considerations for the future regional energy systems.
Utarmning av fossila bränslekällor, ekonomisk utveckling, städernas utbredning och klimatförändring är svåra utmaningar för kommunala- och regionala energisystem. Planering av det regionala energisystemet, inklusive avfallshantering, förnyelsebara energikällor, energieffektivisering och hänsyn till klimatförändringar, anses avgörande för att möta dessa utmaningar och gå mot ett hållbart samhälle. Denna avhandling innehåller studier av energisystem centrerad kring hushållsavfall, potentialet för fossilbränslefria regionala energisystem som utnyttjar ökad andel förnyelsebara energiprodukter med avfall som en energikälla och prestandautvärdering av ett biomassa-eldat kraftvärmeverk. Studierna har organiserats efter storlek på system, från nationella avfall-till-energi scenarier till enskilda kraftverk. Den första studien behandlar övergripande möjligheten att genom avfall-till-energi bidra till energiförsörjningen och begränsa utsläppet av växthusgaser i Sverige till 2050 under flera olika scenarier. Beroendet på avfall-till-energiscenario visar studien att genom att utnyttja avfall kan mellan 38 och 186 TWh energi levereras och dessutom kan koldioxidutsläppen reduceras med 1-12 miljoner ton till år 2050 med 2010 som basår. På den regionala nivån, statiska och dynamiska optimeringsmodeller, med fokus på avfall-till-energi, är utvecklats för två regioner, en i Sverige och en i Finland. Det första modellen används för hitta den optimala placeringen av nya energianläggningar, anpassning av befintliga anläggningar och placering av odlingar av energigrödor. Den senare ingår i en fallstudie av den regionala kraft- och värmeproduktionen genom utnyttjande av biogas producerad från jordbruksavfall och djurgödsel. Centraliserade biogasanläggningar presterar bättre än decentraliserad anläggningar när det gäller energi – och kolbalanser även om i båda fallen så är skillnaden mellan konsumerad mängd bränsle, värme och el och producerad värme och el försumbar. Däremot kan en betydande mängd av växthusgasutsläppet i båda fallen undvikas jämfört med nuläget. Anpassning av befintliga konventionella kraftvärmeverk är ett annat alternativ för att förbättra det regionala energisystemet. Studien visar att genom att integrera värmekrävande processer såsom torkning, bioetanol- och pelletsproduktion med befintliga kraftvärmeverk kan den totala energieffektiviten och uteffekten förbättras, öka den årliga drifftiden och minska produktionskostnaderna och utsläppen av växthusgaser. Rekommendationen är att för de framtida regionala energisystemen överväga att bygga nya avfall-till-energianläggningar med optimal placering, uppgradera befintliga energianläggningar utöka insamlandet av avfall/restprodukter från jord- och skogbruk och plantera mer energigrödor.

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Costa, Fernando Corner da. "Gases combustíveis como alternativas à eletrotermia em aquecimento direto e calor de processo no setor industrial brasileiro." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/86/86131/tde-13012014-164600/.

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Este trabalho tem por objetivo analisar as perspectivas dos gases combustíveis como energia final para a obtenção de energia útil, em aquecimento direto (AD) e calor de processo (CP), identificando e quantificando potenciais como alternativa da eletrotermia. São comparados dois panoramas na avaliação das economias de energia primária pela substituição da eletrotermia: o primeiro considerando que a energia substituída oriunda de energéticos do parque gerador; e o segundo levando em conta que a redução se refletiu nas termelétricas. Para atingir este objetivo, o trabalho se inicia com uma revisão bibliográfica, onde são tratados os aspectos necessários para um melhor entendimento do texto, com os conceitos de eletrotermia, calor e termodinâmica, seguindo-se um capítulo destinado aos gases combustíveis, suas características e disponibilidade futura para a conversão. As informações básicas para a análise dos potenciais nos setores foram tomadas a partir do último Balanço de Energia Útil, além de trabalhos desenvolvidos no mercado industrial pelo autor. O trabalho discorre também sobre configurações tecnológicas usadas nas conversões, incluindo os custos envolvidos. Na conclusão, os cálculos mostraram que significativas economias de energia primária podem ser obtidas com a conversão da eletrotermia para gases combustíveis no setor industrial brasileiro, considerando a eletricidade produzida a partir de plantas termelétricas.
This paper aims to analyze the prospects of fuel gases as final energy in order to get useful energy in direct heating and process heat, identifying and qualifying potentials as the alternative of electrothermy. Two panoramas are compared in the evaluation of primary energy displacement: the first one considering the replaced energy coming from energy generating facilities and the second taking into account that the reduction was reflected in thermoelectric power plants. To achieve this goal, the work begins with a literature review which covers the aspects needed for a better understanding of the text, with the concepts of electrothermy, heat and thermodynamics, followed by a chapter intended for fuel gases, their characteristics and future readiness for conversion. The basic information for the analysis of potential sectors were taken for the last Useful Energy Balance, and work undertaken by the author in the industrial market. The paper also discourses about technological configurations used in conversions, including also the costs involved. In conclusion, the calculations showed that significant primary energy savings can be obtained through the conversion of electrothermy by fuel gases in the Brazilian industrial sector, taking into account the electricity produced from thermoelectric power plants.

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Gupta, Abhinav. "Losses of heat and particles in the presence of strong magnetic field perturbations." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210343.

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Thermonuclear fusion has potential to offer an economically, environmentally and socially acceptable supply of energy. A promising reactor design to execute thermonuclear fusion is the toroidal magnetic confinement device, tokamak. The tokamak still faces challenges in the major areas which can be categorised into confinement, heating and fusion technology. This thesis addresses the problem of confinement, in particular the role of transport along magnetic field lines perturbed by diverse MHD instabilities.

Unstable modes such as ideal ballooning-peeling, tearing etc. break closed magnetic surfaces and destroy the axisymmetry of the magnetic configuration in a tokamak, providing deviation of magnetic field lines from unperturbed magnetic surfaces. Radial gradients of plasma parameters have nonzero projections along such lines and drive parallel particle and heat flows which contribute to the radial transport. Such transport can significantly affect confinement as this takes place by the development of neoclassical tearing modes (NTMs) in the core and edge localised modes (ELMs) at the plasma periphery.

In this thesis, transport of heat through non-overlapped magnetic island chains is first investigated using the 'Optimal path' approach, which is based on the principal of minimum entropy production. This model shows how the effective heat conduction through islands increases with parallel heat conduction and with the perturbation level. A more standard analytical approach for the limit cases of "small" and "large" islands is also presented. Transport of heat through internally heated magnetic islands is next investigated by further development of the 'Optimal path' method. In addition the approach by R. Fitzpatrick, has been extended for this investigation. By application of these approaches to experimental observations made at TEXTOR tokamak, heat flux limit, limiting parallel heat conduction in low collisional plasmas, is elucidated.

Models to study transport of heat and particles due to ELMs have also been developed. Energy losses during ELMs have been estimated considering contribution from parallel conduction due to electrons and parallel convection of ions, with constant level of the magnetic field perturbation, steady profiles for density and temperature, and by accounting for the heat flux limit. The estimate shows good agreement with experimental observations. The model is developed further by accounting for the time evolution of the perturbation level due to ballooning mode, and of density and temperature profiles.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished

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Giai-Coletti, Cristina. "Rugby : more than just a game : a study of the cumulative effects of mild head injuries on high school rugby players." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1007809.

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The present study comprises part of an ongoing research study investigating the effects 0 f cumulative mild head injuries 0 n Rugby Union p layers. The aim 0 f t he study was to ascertain whether there are neuropsychological effects of cumulative mild head injuries sustained during the rugby-playing careers of senior schoolboy rugby players. Participants were top-level rugby players from high schools in Grahamstown and Cape Town (n = 79) and non-contact sport controls of top-level field hockey players from the same schools (n = 58). Group mean comparisons across a battery of neuropsychological tests were carried out between the Total Rugby versus the Total Field Hockey group, and the Rugby Forwards versus the Rugby Backs group. Comparisons between Total Rugby versus Total Field Hockey revealed impaired performance by the rugby players on two tests of visuoperceptual tracking, namely Digit Symbol Substitution and Trail Making Test (Part A). For Rugby Forwards versus Rugby Backs, there were no consistent differences to support the expectation that forwards would perform worse than backs. Forwards performed more poorly than backs on WMS Associate Learning Subtest - Hard (Delayed Recall), whereas backs performed more poorly than forwards on Digits Backwards. This suggests that some individuals in the cohort were starting to exhibit verbal memory deficit, albeit not clearly in association with forward positional play. Overall, results of the present study provide tentative support for the hypothesis that school level rugby players are more susceptible to the effects of cumulative concussive and sub-concussive head injuries than are non-contact sport controls.
KMBT_363
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Ho, Minh Tuan. "Kinetic modeling of the transient flows of the single gases and gaseous mixtures." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4741/document.

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Un gaz à l'intérieur d’un microsystème ou d’un milieu poreux est dans un état hors équilibre, car le libre parcours moyen des molécules est comparable à la dimension caractéristique du milieu. Ce même état degaz, appelé raréfié, se retrouve en haute altitude ou dans un équipement de vide à basse pression. Ces gaz raréfiés suivent des types d’écoulements qui peuvent être décrits par des modèles cinétiques dérivés de l'équation de Boltzmann. Dans ce travail nous présentons les principaux modèles et leurs mises en oeuvre numériquepour la simulation des écoulements de gaz raréfiés. Parmi les modèles utilisés nous présentons les deux modèles complets de l'équation de Boltzmann, le modèle de Shakhov(S-model) pour un gaz monoatomique et le modèle de McCormack pour un mélange de gaz toujours monoatomiques. La méthode des vitesses discrètes est utilisée pour la discrétisation numérique dans l'espace des vitesses moléculaires et le schéma de type TVD est mis en œuvre dans l'espace physique. L’aspect original de ce travail se situe sur les régimes transitoires et, en particuliersur les comportements non-stationnaires des transferts de chaleur et de masse. Cependant, pour certaines configurations nous considérons uniquement les conditions stationnaires des écoulements et un schéma implicite est développé afin de réduire le coût de calcul. En utilisant ces approches numériques, nous présentons les résultats pour plusieurs types d’écoulements non-stationnaires, de gaz raréfiés monoatomiqueset de mélanges binaires de gaz monoatomiques
A gas inside the microsystems or the porous media is in its non-equilibrium state, due to the fact that the molecular mean free path is comparable to the characteristic dimension of the media. The same state of a gas, called rarefied, is found at high altitude or in the vacuum equipment working at low pressure. All these types of flow can be described by the kinetic models derived from the Boltzmann equation. This thesis presents the development of the numerical tools for the modeling and simulations of the rarefied gas flows. The two models of the full Boltzmann equation, the Shakhov model (S-model) for the single gas and the McCormack model for the gas mixture, are considered. The discrete velocity method is used to the numerical discretization in the molecular velocity space and the TVD-like scheme is implemented in the physical space. The main aspect of this work is centered around the transient properties of the gas flows and, especially, on the transient heat and mass transfer behaviors. However, for some configurations only steady-state solutions are considered and the implicit scheme is developed to reduce the computational cost. Using the proposed numerical approach several types of the transient rarefied single gas flows as well as the binary mixture of the monoatomic gases are studied

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Adriazola, Moyano Ricardo Ariel. "Desarrollo de una metodología analítica para identificar y cuantificar n-propanol en muestras de sangre y cerebro de origen tanatológico por cromatografía gaseosa con Head-Space." Tesis, Universidad de Chile, 2006. http://www.repositorio.uchile.cl/handle/2250/105529.

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Unidad de práctica para optar al título de Químico Farmacéutico
No autorizada por el autor para ser publicada a texto completo en el Portal de Tesis Electrónicas
El Servicio Médico Legal (SML) de Santiago es una entidad pública dependiente del Ministerio de Justicia, cuya misión es asesorar a los Tribunales de Justicia y al Ministerio Público, en materias médico-legales, a través de la emisión de informes periciales, tanatológicos, psiquiátricos, clínicos, sexológicos y de laboratorio. El trabajo que a continuación se presenta, nace de la necesidad de la Unidad de Alcoholemia del SML, por identificar y cuantificar alcoholes de putrefacción, ya que es sabido que no todo el alcohol encontrado en una alcoholemia postmortem es de origen exógeno, sino que muchas veces es de origen endógeno. Para ello se realizaron curvas de calibración para n-propanol, alcohol que normalmente no existe en el cuerpo humano y que está asociado a la producción de etanol postmortem. Para el análisis se utilizó un cromatógrafo gaseoso con sistema Head-Space, con autosampler, detector FID y procesador de datos. Las concentraciones seleccionadas para estas curvas están de acuerdo a la bibliografía encontrada y que son: 0.01, 0.02, 0.03, 0.05, 0.08, 0.10 y 0.20 g /L y como estándar interno se utilizó terbutanol. Se realizaron ocho curvas de calibración en duplicado para cada valor de la curva, en las cuales el n-propanol resultó ser lineal y reproducible entre los resultados inter e intradía (con una desviación estándar de 0.1034 y un coeficiente de variación de 1.85 % entre sus pendientes). En una segunda parte se midieron muestras reales de sangre y cerebro de origen tanatológico, con indicios de descomposición, de forma de relacionar la presencia de n-propanol con la producción de etanol postmortem en forma endógena

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Sharma, Suyash. "Predicting the Current Season's Win Percentages in the National Hockey League Using Data from the Previous Season: Can Game-Level Data Help?" Scholarship @ Claremont, 2018. http://scholarship.claremont.edu/cmc_theses/1990.

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Researchers have tried to predict winning percentages for the National Hockey League (NHL) teams based on their performance in the previous seasons. However, these predictions have not been very accurate. This study hypothesizes that incorporating pair-wise game-level data with season-level data can be useful in improving the prediction of a team’s win percentage. Season-level data and pair-wise game-level data from the 2005-2006 season to the 2015-2016 season has been used to predict winning percentages for the pairs in each of the following seasons. Significant results were not found for any of the pair-wise game-level data variables except for two pair-wise variables. This helps establish the idea that including more granular information does not necessarily increase the predictive power of models. One of the pair-wise variables found to be significant (at the 10% level of significance) was when high goal differential was observed in the interaction term between high goal differential for a team in its home games against the other pair-wise team and the goal differential for a team in its home games against the other pair-wise team. This provides marginal support for the claim that extreme game-level outcomes from the previous season can help in predicting a team’s win percentage in the following season. Another pair-level variable found to be significant (at the 5% level of significance) was when high goal differential was observed and at least 4 games played was not observed in the interaction term between at least 4 games played against the other pair-wise team and high goal differential for a team in its home games against the other pair-wise team. This suggests that only in the games a team plays outside its own division, the extreme game-level data helps in predicting a team’s win percentage in the following season.

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Santos, Rodrigo Fernando Estella dos. "Análise experimental do desempenho e da combustão de um motor de ignição por compressão alimentado por uma mistura ternária de combustíveis: diesel, biodiesel e etanol." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-01022016-151906/.

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É analisado o desempenho de um motor de ignição por compressão turboalimentado por uma mistura temária de combustíveis (diesel, biodiesel e etanol) através do comportamento do motor operando com um combustível principal, o qual poderá ser o diesel ou biodiesel ou misturas destes dois, com e sem sua substituição parcial por etanol no coletor de admissão. A análise do desempenho é feita através das curvas de torque, potência, rendimento térmico e consumo específico de combustível. A combustão do motor é estudada através de um programa simulador que utiliza um modelo zero-dimensional, que avalia a taxa de liberação de calor durante a combustão e tem como dado de entrada a curva de evolução da pressão dentro do cilindro. Faz-se a identificação e quantificação do fenômeno da detonação utilizando análise espectral, através do sinal de pressão da câmara de combustão, para o motor operando com diversas misturas combustíveis. São analisadas também as emissões gasosas do motor com as misturas, e a viabilidade técnica do uso de biodiesel em motores de ignição por compressão, além de um estudo geral sobre o uso do éster de óleo vegetal.
The performance of a three-fuel system (diesel, biodiesel and ethanol) turbocharged compression-ignition engine is analyzed, through the engine behavior supplied by mixtures of diesel or biodiesel or mixtures of these fuels with ethanol in the intake manifold. The performance analysis is made by torque, power, specific fuel consumption and thermal efficiency curves. The engine combustion is studied by a simulator program that uses a zero-dimensional model, that evaluate the heat release rate during the combustion and it has as input data the pressure evolution curves inside the cylinder. The knocking phenomenon is studied by spectral analysis. The pollutant gases emissions and the technical viability of the utilization of biodiesel also are analyzed, beyond a general study about of vegetal oil ester.

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De, Wit Pedro. "Energy audit in Ockelbo healthcare center." Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-32492.

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As the world is becoming aware of the impact of global warming reducing greenhouse gases emissions presents itself as a fundamental issue in order to avoid the environmental collapse and its negative consequences. One of the key points of this challenge it’s to make a responsable use of the energy. In European countries, buildings sector consumes around the 40% of the total energy use. Thus ensuring energy efficiency becomes a vital issue in order to reduce energy usage and its environmental impact. This master thesis reports on the energy audit made in Din Hälsocentral. The energy use of the health center is studied through a heat energy balance from September to May (the months when the local district heating network works) with the aim of suggesting cost-effective energy saving measures.The study combines information provided by Din Hälsocentral, data estimated based on the characteristics of the installations and literature review. The energy balance shows that Din Hälsocentral has a heat energy input 595 MWh. This heat is received by the health center through district heating, solar radiation and internal heat generation while it’s lost through transmission losses, mechanical ventilation losses, infiltration heat losses and tap water heating. To decrease the energy use five saving measures have been suggested: the substitution of the health center windows by more efficient ones, the reduction of the indoor temperature, the replacement of the heat exchangers from the mechanical ventilation system, the installation of an aerothermal heating system in order to replace the district heating supply and the improvement of the roof isolation. The implementantion of those different measures would report heat energy savings between the 4% and the 63%, having payback periods between 0 and 7 years. However, the viability of application of aerothermal heating system in the health center installations as well as its maintenance costs must be studied more deeply.

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Dissertations / Theses on the topic 'Heap games'

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