Dissertations / Theses on the topic 'One to one interaction'
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Bryan, Daphne Margaret. "Student/teacher interaction in the one-to-one piano lesson." Thesis, University of Sheffield, 2004. http://etheses.whiterose.ac.uk/3557/.
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The subject of this thesis is student/teacher interaction in the one-to-one piano lesson. As well as analysing lesson interaction itself, this research also considers the influences and effects of this behaviour. Two longitudinal studies monitored pupil/teacher dyads over a two-year period, and found that interaction changes very little over time beyond a small increase in relaxation which was more evident through participant report than observation. Five short study dyads, involving five undergraduate students an d three teachers were each recorded over a series of piano lessons. Using multiple sources of evidence, three perspectives were explored, that of the observer, the teacher and the student. Analysis focussed on five specific topics; student learning, student communication, influences on teaching, teachers' use of gesture and movement, and how teachers respond to the needs of their students. The primary conclusion drawn from these studies is that the student/teacher relationship and lesson behaviour is asymmetrical, teacher-dominated and formulaic. This style is teacher promoted, student supported and influenced by previous experiences. Lesson routine is based on improving performance skills through the study of individual pieces and involves three steps - student performance, teacher assessment and advice. Student performance is the primary medium by which they communicate their ideas and progress, and from which teachers identify the students' needs. Strengths (teaching content and imaginative methods of delivery) and weaknesses (students' passivity, frustration and teachers' lack of understanding) were evident in the lessons at the tertiary level and the teacher-dominated approach is seen as inappropriate for students at this level. It is suggested that a more student-directed lesson style would improve learning and lesson interaction, and prepare students better for a future of independent music making.
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Seipp, Karsten. "Improving one-handed interaction with touchscreen smartphones." Thesis, Goldsmiths College (University of London), 2015. http://research.gold.ac.uk/12579/.
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One-handed operation of touchscreen smartphones presents challenges such as hard-to-reach targets and the thumb occluding the interface. There are two main approaches to address these challenges: Modification of the graphical user interface (GUI) and extension of the device's input modalities using its sensors. Previous work has presented techniques addressing a specific problem in isolation, but has failed to provide one solution which tackles all main challenges of thumb interaction together. This thesis examines whether this can be done. To establish the background, the thesis finds that users prefer convenience over efficiency and confirms that they predominantly use one hand. To detect mode of operation, the thesis presents an approach to classify a user's finger with a high degree of accuracy using a single touch. Following the first research avenue, the thesis presents a thumb-optimised GUI that increases usability and efficiency of one-handed website operation. Following the second avenue of research, the thesis presents a novel one-handed input technique for smartphones, using a set of three off-screen gestures. Both approaches address the most common problems of one-handed smartphone operation via the thumb largely successfully, but fail to completely solve the problem of interface occlusion. The thesis adds to the literature in the field of visual perception, input classification, GUI optimisation, and input techniques. Readers learn that visual search strategies of the desktop world may also apply to the mobile world and that eye gaze position may have a greater impact on target acquisition time than Fitts's law. The one-touch finger classification technique provides an additional layer of context and new opportunities for improving the human-machine dialogue. The thumb-optimised GUI presents practitioners with a potential blueprint for translating classical WIMP UI elements into thumb-friendly touch interfaces while the novel input technique provides a new layer of complexity for off-screen interaction.
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Karlson, Amy Kathleen. "Interface and interaction design for one-handed mobile computing." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7700.
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Thesis (Ph. D.) -- University of Maryland, College Park, 2007.Thesis research directed by: Dept. of Computer Science. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Smith, Luke William. "Electron interaction effects in quasi-one-dimensional quantum wires." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610185.
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Weller, Jacqueline. "Dynamic One Hand Chord Keyboard." Thesis, Uppsala universitet, Institutionen för informatik och media, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-454685.
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Portable, handheld, and wearable devices are an integrate part of everyday life, yet there is no well-established text inputmethod for devices with very small screens. Speech to text has been a quick fix, but entails privacy concerns and can beobtrusive. Chord keyboards bring various advantages for application in a mobile environment, as they require fewer keys andcan thus be small and portable. The aim of this work is to suggest an alternative to the QWERTY keyboard, suitable for textentry on devices of all sizes, shapes and mobility requirements. A one hand operational chord keyboard was developed andevaluated in a small user study with regard to its social acceptability. Learnability showed to be a concern that discouragesuse, while social aspects did not seem to be an issue.
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Ball, Cheryl E. "Dinner For One." VCU Scholars Compass, 2000. http://scholarscompass.vcu.edu/etd/1209.
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Dinner For One, a hypermedia poetry thesis, explores the themes of aloneness, sexuality, independence, and journeys of discovery and distance. The Chinese zodiac stamps used as navigational elements in Dinner for One and the prose poems written as postcards to oneself an others reinforce the notion of travel. The fortunes from Chinese cookies give prophecies and horoscopes, reminding us of our fate, which is beyond our conrol. Dinner For One means to question, through poetry and interactive, hypertextual reading techniques, how much faith and trust we should hold in influences outside of our lives. The poems in this thesis are meant to be an examination of what we tell ourselves and, sometimes, make ourselves believe.This multimedia, interactive presentation is written with Macromedia 2000. To view the executable file, you must first download it to your computer. It compatible with PC Windows 95/98/NT and best viewed with 800x600 high color resolution on a 17" or larger monitor. To close the document, press the ESC key. The Chinese Zodiac stamps are courtesy of http://www.post.gov.tw/estamp/
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Kottamasu, V. L. Phanikumar. "User interaction of one-dimensional panoramic images for iPod Touch." Thesis, Linköpings universitet, Interaktiva och kognitiva system, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-86551.
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Modern handheld devices such as smart phones and tablets have become popular for capturing and viewing panoramic images, but navigation in these devices is a challenging task due to small screen size. In this thesis work, investigation is done for similarities and differences between two user interaction techniques of one-dimensional cubical panorama images. This work is carried out on a fourth generation Apple iPod Touch. The first user interaction technique swipe (drag-based panning) is developed using touch-gestures, while the second technique look-around (device-orientation panning) is developed using motion-sensors such as gyroscope and accelerometer for device-orientation. Both these techniques were implemented for touch-screen devices for an angle of 360 degrees. In the swipe technique, the navigation is done by using finger movements on the screen, while in the look-around based panning technique the navigation is done by moving the device direction physically in space through an angle of 360 degrees. The experiments were conducted on 20 participants for the two panning techniques. The results have shown that the look-around based panning technique offers a better user interaction compared to swipe based panning technique. Look-around based panning technique is natural and more free to move physically in space. Swipe based panning technique is easy to use in some situations and it does not require any physical space to move around the system.
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Kleimann, Tobias. "Interaction effects in electronic transport through one-dimensional quantum dots." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=967921325.
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Frederick, Garnett Noel. "Comparison of two mentoring programs for at-risk black adolescents : a traditional one-to-one mentoring program and a school-to-work transitional program." FIU Digital Commons, 2001. http://digitalcommons.fiu.edu/etd/3613.
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The purposes of this study were: (a) to compare the impact of One-to-One (OTO) mentoring interventions administered in the high school setting, and the workplace of the students who participated in the School-to-Work (STW) transitional program, and (b) to identify how the participants perceived their experience in the OTO mentoring program and the STW transitional program. A qualitative approach was used to identify how participants perceived their mentoring experiences with the STW and OTO mentoring programs by utilizing focus groups and content analysis. A quantitative approach was used to compare the statistical differences of outcomes between the STW and OTO mentoring programs, by utilizing descriptive statistics, independent samples Wests, chi- square analyses, and logistic regression. The sample was limited to participants in the STW and OTO mentoring programs resulting in 21 participants for the qualitative approach and 114 participants for the quantitative approach.
Results from the qualitative approach indicated that focus group participants in the STW program were satisfied with the program and the relationship with their mentors. They also suggested that the STW program be lengthened to include the entire academic year. Participants from the OTO focus group were dissatisfied with their program due to inadequate mentor involvement. Results from the quantitative approach showed that the increase in school attendance for the STW program’s at-risk Black male youth was statistically significant compared to the OTO program participants; the STW program participants displayed a better outlook for attending college that was statistically significant compared to those in the OTO program; and the OTO program participants displayed a better outlook for permanent employment compared to those in the STW program.
Therefore, this study finds that mentoring can contribute to reducing school absences and high school completion in order for at-risk Black adolescents to attend college. It is recommended that the OTO program be restructured to eliminate the disparity that exists regarding the administration of the STW program and the OTO program.
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Daneshvar, Ahrash. "Interaction and mixing effects in two and one dimensional hole systems." Thesis, University of Cambridge, 2008. https://www.repository.cam.ac.uk/handle/1810/198364.
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This thesis describes electrical measurements performed on low dimensional p-type devices, fabricated from GaAs/AlGaAs heterostructures. The Coulomb interaction between holes is similar to that between electrons. However, the kinetic energy is suppressed, which makes interaction effects particularly important. Holes may also be used to study band structure effects which arise from spin-orbit coupling in the valence band. The effects of Coulomb interactions in low dimensional electron systems are currently being studied extensively. Experiments presented in this thesis indicate the possible importance of Coulomb exchange interactions in both one and two dimensional hole systems (1DHSs,2DHSs). Tilted magnetic field studies of 2DHSs in the quantum Hall regime indicate that Landau levels at even filling factors will not cross. For high filling factor, this is attributed to a spin-orbit mixing effect which arises from the low symmetry ofthe system. At lower filling factor, activation-energy measurements verify that the energy gaps decrease and then increase as the field is tilted. However, the energy gap versus field dependences do not exhibit the curvature that might be expected from a perturbative anticrossing. It is speculated that the origin of this effect is a phase transition driven by the exchange interaction. Balanced arguments contrasting the relative strengths of the mixing and interactions theories are provided. The second part of this thesis describes a new method for the fabrication ofballistic 1DHSs, which exhibit clear conductance quantization. The quantization changes from even to odd multiples of e2/h as a function of the magnetic field in the plane of the heterostructure, as 'spin splitting' causes the 1D subbands to cross. Measurements of the 1D subband energy spacings are used together with the magnetic fields at which the crossings occur to calculate the in-plane g factors of the 1D subbands. These are found to increase as the number of occupied 1D subbands decreases. This enhancement of the g factor is attributed to exchange interactions; possible mixing explanations are also discussed. At higher magnetic fields, the pattern of quantization features shows that the subbands have crossed many times, and that the 1DHS can be strongly magnetized.
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Bradley, Darcy Hepler. "Reconceptualizing literacy learning for adult new literates in one-to-one teacher/student interactions /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487694389391429.
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Seetharaman, Sathya Sai. "Electromagnetic interactions in one-dimensional metamaterials." Thesis, University of Exeter, 2018. http://hdl.handle.net/10871/33746.
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Metamaterials offer the freedom to tune the rich electromagnetic coupling between the constituent meta-atoms to tailor their collective electromagnetic response. Therefore, a comprehensive understanding of the nature of electromagnetic interactions between meta-atoms is necessary for novel metamaterial design, which is provided in the first part of this thesis. The subsequent work in the thesis applies the understanding from the first part to design and demonstrate novel one-dimensional metamaterials that overcome the limitations of metamaterials proposed in literature or exhibit electromagnetic responses not previously observed. Split-ring Resonators (SRRs) are a fundamental building block of many electromagnetic metamaterials. In the first part of the work in this thesis, it is shown that bianisotropic SRRs (with magneto-electric cross-polarisation) when in close proximity to each other, exhibit a rich coupling that involves both electric and magnetic interactions. The strength and nature of the coupling between two identical SRRs are studied experimentally and computationally as a function of their separation and relative orientation. The electric and magnetic couplings are characterised and it is found that, when SRRs are close enough to be in each other's near-field, the electric and magnetic couplings may either reinforce each other or act in opposition. At larger separations retardation effects become important. The findings on the electromagnetic interactions between bianisotropic resonators are next applied to developing a one-dimensional ultra-wideband backward-wave metamaterial waveguide. The key concept on which the metamaterial waveguide is built is electro-inductive wave propagation, which has emerged as an attractive solution for designing backward-wave supporting metamaterials. Stacked metasurfaces etched with complementary SRRs (CSRRs) have also been shown to exhibit a broadband negative dispersion. It is demonstrated through experiment and numerical modeling, that the operational bandwidth of a CSRR metamaterial waveguide can be improved by restricting the cross-polarisation effects in the constituent meta-atoms. The metamaterial waveguide constructed using the modified non-bianisotropic CSRRs are found to have a fractional bandwidth of 56.3\% which, based on a thorough search of relevant literature, is the broadest reported value for an electro-inductive metamaterial. A traditional coupled-dipole toy-model is presented as a tool to understand the field interactions in CSRR based metamaterials, and to explain the origin of their negative dispersion response. This metamaterial waveguide should be of assistance in the design of broadband backward-wave metamaterial devices, with enhanced electro-inductive waveguiding effects. In the final part of the thesis, a one-dimensional metamaterial prototype that permits simultaneous forward- and backward-wave propagation is designed. Such a metamaterial waveguide could act as a microwave analogue of nanoparticle chains that support electromagnetic energy transfer with a positive or a negative dispersion due to the excitation of their longitudinal or transverse dipole modes. The symmetry of the designed hybrid meta-atom permits the co-existence of two non-interfering resonances closely separated in frequency. It is experimentally and computationally shown that the metamaterial waveguide supports simultaneous non-interacting forward- and backward-wave propagation in an overlapping frequency band. The proposed metamaterial design should be suitable for realising bidirectional wireless power transfer applications.
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McDougal, Mary Kathryn. "Unequal and Unfair: Free Riding in One-Shot Interactions." ScholarWorks@UNO, 2016. http://scholarworks.uno.edu/td/2173.
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According to social psychologists, we as a species are inequity averse. We prefer conditions that foster fairness and reject injustice against common good. At the same time, however, unequal power and status hierarchies color almost every aspect of our lives. Advantages are distributed asymmetrically based on hierarchical status processes. Life, in other words, is systematically unfair in addition to being populated by free riders. Are the outcomes of potential free riders correlated with status as well? Does status affect the individual’s ability to successfully free ride? Are higher status actors typically granted a greater degree of social leniency than lower status actors? Are they less likely to be marked as free riders? I conducted a simple vignette study to in which participants were presented with a hypothetical, one-shot interaction, involving a collectively oriented, task in order to investigate the relationship between status and free riding.
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Abdoulaye, Idriss. "A study of teacher-student interactions during reading in one-to-one literacy tutoring sessions." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280396.
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The purpose of this study was to observe and analyze teacher interactions when students read a text during one-to-one literacy tutoring sessions in order to identify features of their interactions and describe how these help further the students' literacy learning. The sociocultural nature of learning was used as the theoretical framework for the study. The research was conducted using a qualitative case study approach. A teacher and one group of students were observed during an academic semester. Data were collected from the following sources: lesson plans, interviews with participants, field notes, Reading Miscue inventory, and audio and video tapes of the tutoring sessions. Only the reading experiences of the tutoring sessions were analyzed. The results showed the types of teaching and learning strategies used by the teacher and students, and changes in the students' reading strategies. The findings suggested that the changes in the students' reading strategies might be due to the teacher's efforts at critical learning moments during their interactions, to guide the students into making use of their intuitive knowledge of language cues. The results of the study reflect the need for educators to focus on the nature of teacher-student interactions during literacy tutoring and the way in which teachers scaffold students' learning of literacy concepts and strategies. While scaffolds are necessary to a child's learning, what is done in these scaffolds is more critical to moving the child toward independence.
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Hachmeister, Nils [Verfasser]. "More Than One - Observing Human Brains in Uncommon Interaction Scenarios / Nils Hachmeister." Bielefeld : Universitätsbibliothek Bielefeld, 2020. http://d-nb.info/1219215155/34.
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Schmidt, Benjamin. "When are two hands better than one? : a study of bimanual interaction." Thesis, University of Canterbury. Computer Science and Software Engineering, 2002. http://hdl.handle.net/10092/9617.
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In everyday life people skillfully use both hands in complex tasks such as driving a car or drawing a picture. However, when attempting tasks on a computer, we are normally restricted to using our dominant hand for direct manipulation. Bimanual interaction is the study of how systems can be de- veloped to allow users to take advantage of their capacity for skilled bimanual interaction. Four design principles for developing bimanual interaction systems are distilled from a review of the current research. Principle One discusses the importance of understanding how people perform bimanual actions. Principle Two discusses what type of devices and actions should be used. Principle Three describes how bimanual interaction techniques can be used to eliminate modes. Principle Four discusses how bimanual interaction techniques can be used to increase usable screen space and reduce time to target and attention switching.
The principles are used to develop two systems (Bi-DM and Bi-Draw). These systems are evaluated with their equivalent traditional unimanual sys- tems (Uni-DM and Uni-Draw). Bi-DM was slightly faster than Uni-DM though the di erence was just outside the 95% signi cance level. Bi-Draw was signi cantly slower than Uni-Draw. The users were required to complete the tasks approximately. An experiment with an expert user of Bi-Draw showed that similar times to Uni-Draw can be achieved.
These results disagreed with prior work that showed bimanual interaction systems are more e cient than their equivalent unimanual versions. A third experiment based on earlier work was conducted. The users were required to complete tasks with a high accuracy level. Comparing the results from this experiment to the one on which it was based indicates that the low quality of the non-preferred mouse was probably responsible for the poor performance of our bimanual systems. Other likely factors detrimentally a ecting the bimanual results include the low accuracy required for completing the tasks and the short training periods.
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Kiang, Julie E. (Julie Ega) 1971. "Biosphere-atmosphere interaction in a one-dimensional climate model of the tropics." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/44504.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.Includes bibliographical references (p. 215-221).
In this study, we develop a one-dimensional model of the tropics which includes two way interaction between the biosphere and the atmosphere. The model integrates a radiative-convective equilibrium model of the atmosphere, a land surface model including plant growth and competition and a monsoon circulation model which allows for the exchange of heat and moisture between the one-dimensional column and its surroundings. The model is applied to two domains in West Africa to test the sensitivity of the system's equilibrium to perturbations to initial vegetation. In the coastal domain, the model simulates a stable forest equilibrium. The equilibrium climate and vegetation show reasonable similarity to observations for the same region. The same equilibrium is reached in both our control simulation and our experimental simulation, in which deforestation is simulated by initializing the model with grassland. Modifications to parameters of the empirical monsoon circulation model show that the climate and vegetation in our model domain are sensitive to the strength of the monsoon circulation and also to climatic conditions in adjacent regions. In particular, changes in the monsoon which allowed hot and dry air to penetrate into the model domain from the north strongly affected the equilibrium climate and vegetation. These sensitivity studies indicated that the existence of multiple equilibria in the biosphere-atmosphere system depends not only on the magnitude of the vegetation-induced climate perturbation, but also on whether or not the perturbation extends across a threshold controlling competition between trees and grasses. In the inland domain, the model simulates a stable grassland equilibrium in both the control simulation and an afforestation experiment. While vegetation conditions in the inland domain strongly affected the energy balance, primarily through changes in surface albedo, they had little effect on precipitation and moisture availability.
by Julie E. Kiang.
S.M.
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McComas, Magers Robyn. "Interactions in the space of one tree /." View thesis View thesis, 2002. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030331.152733/index.html.
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Roo, Joan sol. "one reality : augmenting the human experience through the combination of physical and digital worlds." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0874/document.
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Alors que le numérique a longtemps été réservé à des usages experts, il fait aujourd’hui partie intégrante de notre quotidien, au point, qu’il devient difficile de considérer le monde physique dans lequel nous vivons indépendamment du monde numérique. Pourtant, malgré cette évolution, notre manière d’interagir avec le monde numérique a très peu évolué, et reste toujours principalement basé sur l’utilisation d’écrans, de claviers et de souris. Dans les nouveaux usages rendus possible par le numérique, ces interfaces peuvent se montrer inadaptées, et continuent à préserver la séparation entre le monde physique et le monde numérique. Au cours de cette thèse, nous nous sommes concentrés à rendre cette frontière entre mondes physique et numérique plus subtil au point de la faire disparaître. Cela est rendu possible en étendant la portée des outils numériques dans le monde physique, puis en concevant des artefacts hybrides (des objets aux propriétés physique et numérique), et enfin en permettant les transitions dans une réalité mixte (physique-numérique), laissant le choix du niveau d’immersion à l’utilisateur en fonction de ses besoins. L’objectif final de ce travail est d’augmenter l’expérience de la réalité. Cela comprend non seulement le support de l’interaction avec le monde extérieur, mais aussi avec notre monde intérieur. Cette thèse fournit aux lecteurs les informations contextuelles et les connaissances techniques requises pour pouvoir comprendre et concevoir des systèmes de réalité mixte. A partir de ces fondements, nos contributions, ayant pour but de fusionner le monde physique et le monde virtuel, sont présentées. Nous espérons que ce document inspirera et facilitera des travaux futurs ayant pour vision d’unifier le physique et le virtuelIn recent history, computational devices evolved from simple calculators to now pervasive artefacts, with which we share most aspects of our lives, and it is hard to imagine otherwise. Yet, this change of the role of computers was not accompanied by an equivalent redefinition of the interaction paradigm: we still mostly depend on screens, keyboards and mice. Even when these legacy interfaces have been proven efficient for traditional tasks, we agree with those who argue that these interfaces are not necessarily fitting for their new roles. Even more so, traditional interfaces preserve the separation between digital and physical realms, now counterparts of our reality.During this PhD, we focused the dissolution of the separation between physical and digital, first by extending the reach of digital tools into the physical environment, followed by the creation of hybrid artefacts (physical-digital emulsions), to finally support the transition between different mixed realities, increasing immersion only when needed. The final objective of this work is to augment the experience of reality. This comprises not only the support of the interaction with the external world, but also with the internal one. This thesis provides the reader contextual information along with required technical knowledge to be able to understand and build mixed reality systems. Once the theoretical and practical knowledge is provided, our contributions towards the overarching goal of merging physical and digital realms are presented. We hope this document will inspire and help others to work towards a world where the physical and digital, and humans and their environment are not opposites, but instead all counterparts of a unified reality
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Dias, Mariama Rebello de Sousa. "Transport phenomena in quasi-one-dimensional heterostructures." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/4973.
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Previous issue date: 2014-02-21Universidade Federal de Sao Carlos
O crescimento e caracterização de sistemas de heteroestruturas semicondutoras quasi-unidimensionais têm atraído grande interesse devido à sua potencial de aplicação tecnológica, como foto-detectores, dispositivos opto-eletrônicos assim como seu para o processamento de informação quântica e aplicações em fotônica. O objetivo desta tese é o estudo das propriedades de transporte eletrônico e de spin em sistemas semicondutores quasi-unidimensionais, especificamente trataremos de nanofios (NWs) homogêneos, NWs acoplados, NWs do tipo plano-geminado (TP), diodos de tunelamento ressonante (ETD) e cadeias de pontos quânticos (QDCS). Escolhemos o método k-p, particularmente o Hamiltoniano de Luttinger, para descrever os efeitos de confinamento e tensão biaxial. Este sugeriu uma modulação do caráter do estado fundamental que, complementada com a dinâmica fônons fornecidas pelas simulações da Dinâmica Molecular (MD), permitiu a descrição da modulação da mobilidade de buracos por emissão ou absorção de fônons. Em relação ao sistema de NWs acoplado,estudamos, através do método da matriz de transferência (TMM), as propriedades de transporte de elétrons e spin sob a interação de spin-órbita (SOI) de Eashba, localizada na região de acoplamento entre fios. Foram consideradas várias configurações de tensões de gate (Vg) aplicadas nos fios. Desse modo, compreendemos a modulação do transporte de spin quando esse é projetado no direção-z através da combinação do SOI e das dimensionalidades do sistema. Da mesma forma, a combinação de SOI e da Vg aplicada deu origem a modulação da polarização, quando o spin medido é projetado na mesma direção em que o SOI de Eashba atua, a direção y. Usando o TMM, exploramos as propriedades de transporte de um DBS e o efeito de uma resistência em série com o intuito de provar a natureza da biestabilidade das curvas características I V bem como o aumento de sua área com temperatura, resultados fornecidos por experimentos. O modelo indicou que aumentando da resistência pela diminuição sa temperatura aumenta a área biestável. A presença de uma hetero-junção adicional ao sistema induz uma densidade de carga nas suas interfaces. De acordo com esta configuração, a queda de tensão total do ETDS muda, podendo ser confirmada experimentalmente. A formação dos peculiares campos de deformação e sua influência sobre a estrutura eletrônicas e propriedades de transporte em superredes de TP foi estudada sistematicamente. Assim, as propriedades de transporte, de ambos os elétrons e buracos, pode ser sintonizada eficientemente, mesmo no caso de elétrons r em sistemas de blenda de zinco, contrastando com a prevista transparência de elétrons r em superredes de semicondutores III-V heteroestruturados. Além disso, constatamos que a probabilidade de transmissão para buracos da banda de valência também poderia ser efetivamente modificada através de uma tensão externa.Por fim, colaboradores sintetizaram com sucesso sistemas de QDCs de InGaAs através da epitaxia de feixe molecular e engenharia de tensão. Um comportamento anisotrópico da condutância com a temperatura foi observado em QDCs com diferentes concentrações de dopagem, medida realizada ao longo e entre os QDCs. O modelo teórico 1D de hoppíng desenvolvido mostrou que a presença de estados OD modela a resposta anisotrópica da condutância neste sistemas.
The growth and characterization of semiconductor quasi-one-dimensional heterostructure systems have attracted increasing interest due to their potential technological application, like photo-detectors, optoelectronic devices and their promising features for quantum information processing and photonic applications. The goal of this thesis is the study of electronic and spin transport properties on quasi-one-dimensional semiconductor systems; specifically, homogenous nanowires (NWs), coupled NW s, twin-plane (TP) NWs, resonant tunneling diodes (RTDs), and quantum dot chains (QDCs). The k-p method, in particular the Luttinger Hamiltonian, was chosen to describe the effects of biaxial confinement and strain. This suggested a modulation of the ground state character that, complemented with the phonon dynamics provided by Molecular Dynamics (MD) simulations, allowed the description of the hole mobility modulation by either phonon emission or absorption. Regarding the coupled NW s system, the electron and spin transport properties affected by a Rashba spin-orbit interaction (SOI) at the joined region were unveiled through the Transfer Matrix Method (TMM). Various configurations of gate voltages (Vg), applied on the wire structure, were considered. We were able to understand the modulation of the spin transport projected in the z-direction trough the combination of the SOI and the system dimensionalities. Likewise, the combination of SOI and applied Vg gave rise to a modulation of the polarization, when the measured spin is projected in the same direction where the Rashba SOI acts, the y-direction. The transport properties of a DBS and the effect of a resistance in series was explored within the TMM to prove the nature of a bistability of the I V characteristics and its enhanced area with temperature provided by the experiment. The model indicates that increasing the resistente by decreasing the temperature, the bistable area enhances. The presence of an additional heterojunction induces a sheet charge at its interfaces. Under this configuration, the total voltage drop of the RTD changes and can be confirmed experimentally.The formation of the peculiar strain fields and their influence on the electronic structure and transport properties of a TP superlattice was systematically studied. Hence, the transport properties of both electrons and holes could be effectively tuned even in the case of T-electrons of zincblende systems, contrasting to the predicted transparency of T-electrons in heterolayered III-V semiconductor superlattices. Also, the transmission probability for holes at valence band could also be effectively modified by applying an external stress. Finally, using molecular-beam-epitaxy and skillful strain engineering, systems of In-GaAs QDCs were successfully synthesized by collaborators. The QDCs with different doping concentrations showed an anisotropic behavior of the conductance, measured along and across the QDCs, with temperature. The theoretical ID hopping model developed found that the presence of OD states shapes the anisotropic response of the conductance in this system.
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Maurer, A. Caroline. "Peer dialogue at literacy centers in one first-grade classroom." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1211984125.
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Hardikar, Rahul Padmakar. "Dynamic electron-phonon interactions in one-dimensional models." Diss., Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-11092007-143010.
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Liang, Xinxia. "Development of new approaches for the synthesis and decoding of one-bead one-compound cyclic peptide libraries." Doctoral thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/26760.
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La plupart des processus cellulaires et biologiques reposent, à un certain niveau, sur des interactions protéine-protéine (IPP). Leur manipulation avec des composés chimiques démontre un grand potentiel pour la découverte de nouveaux médicaments. Malgré la demande toujours croissante en molécules capables d'interrompre sélectivement des IPP, le développement d'inhibiteurs d’IPP est fortement limité par la grande taille de la surface d'interaction. En considérant la nature de cette surface, la capacité à mimer des structures secondaires de protéines est très importante pour lier une protéine et inhiber une IPP. Avec leurs grandes capacités peptidomimétiques et leurs propriétés pharmacologiques intéressan-tes, les peptides cycliques sont des prototypes moléculaires de choix pour découvrir des ligands de protéines et développer de nouveaux inhibiteurs d’IPP. Afin d’exploiter pleinement la grande diversité accessible avec les peptides cycliques, l’approche combinatoire «one-bead-one-compound» (OBOC) est l’approche la plus accessible et puissante. Cependant, l'utilisation des peptides cycliques dans les chimiothèques OBOC est limitée par les difficultés à séquencer les composés actifs après le criblage. Sans amine libre en N-terminal, la dégradation d'Edman et la spectrométrie de masse en tandem (MS/MS) ne peuvent pas être utilisées. À cet égard, nous avons développé de nouvelles approches par ouverture de cycle pour préparer et décoder des chimiothèques OBOC de peptides cycliques. Notre stratégie était d'introduire un résidu sensible dans le macrocycle et comme ancrage pour permettre la linéarisation des peptides et leur largage des billes pour le séquençage par MS/MS. Tout d'abord, des résidus sensibles aux nucléophiles, aux ultraviolets ou au bromure de cyanogène ont été introduits dans un peptide cyclique et leurs rendements de clivage évalués. Ensuite, les résidus les plus prometteurs ont été utilisés dans la conception et le développement d’approches en tandem ouverture de cycle / clivage pour le décodage de chimiothèques OBOC de peptides cycliques. Dans la première approche, une méthionine a été introduite dans le macrocycle comme ancrage pour simultanément permettre l’ouverture du cycle et le clivage des billes par traitement au bromure de cyanogène. Dans la seconde approche, un résidu photosensible a été utilisé dans le macrocycle comme ancrage pour permettre l’ouverture du cycle et le clivage suite à une irradiation aux ultraviolets. Le peptide linéaire généré par ces approches peut alors être efficacement séquencé par MS/MS. Enfin, une chimiothèque OBOC a été préparée et criblée la protéine HIV-1 Nef pour identifier des ligands sélectifs. Le développement de ces méthodologies permttra l'utilisation de composés macrocycliques dans les chimiothèques OBOC et constitue une contribution importante en chimie médicinale pour la découverte de ligands de protéines et le développement d'inhibiteurs d’IPP.A great number of cellular and biological processes depend, at some level, on protein-protein interactions (PPI). Their manipulation with chemical compounds has provided a great potential for the discovery of new drugs. Despite the increasing demand for molecules able to interrupt specific PPI, the development of small PPI inhibitors is beset by a number of challenges such as the large size of the interaction interface. Based on the interface’s nature, the ability to mimic protein secondary structures is very important to bind a protein and inhibit PPI. With their interesting peptidomimetic abilities and pharmacological properties, cyclic peptides are very promising templates to discover protein ligands and development new PPI inhibitors. To fully exploit the great diversity accessible with cyclic peptides, the one-bead-one-compound (OBOC) combinatorial method is certainly the most accessible and powerful approach. Unfortunately, the use of cyclic peptides in OBOC libraries is limited by difficulties in sequencing hit compounds after the screening. Lacking a free N-terminal amine, Edman degradation cannot be used on cyclic peptides and complicated fragmentation patterns are obtained by tandem mass spectrometry (MS/MS). In this regard we have designed and developed new convenient ring-opening approaches to prepare and decode OBOC cyclic peptide libraries. Our strategy was to introduce a cleavable residue in the macrocycle and as a linker to allow linearization of peptides and their release from the beads for sequencing by MS/MS. First, amino acid residues sensible to nucleophiles, ultraviolet irradiation or cyanogens bromide were introduced in a model cyclic peptide. Afterward, the most promising residues were used to design and develop tandem ring-opening/cleavage approaches to decode OBOC cyclic peptide libraries. In the first approach a methionine residue was introduced in the macrocycle and as a linker to allow a simultaneous ring-opening and cleavage from the beads upon treatment with cyanogens bromide. In the second approach, a photosensitive residue was used in the macrocycle and as a linker for a dual ring-opening/cleavage upon UV irradiation. The linear peptide generated by these approaches can be efficiently sequenced by tandem mass spectrometry. Finally, an OBOC library has been prepared and screened against the HIV-1 Nef protein to identify selective ligands. The development of these methodologies will prompt the use of macrocyclic compounds in OBOC libraries and be an important contribution in medicinal chemistry for the discovery of protein ligands and the development of PPI inhibitors.
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Albertsson, Martin. "Analysis of the Many-Body Problem in One Dimension with Repulsive Delta-Function Interaction." Thesis, Uppsala universitet, Teoretisk fysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-226119.
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The repulsive delta-function interaction model in one dimension is reviewed for spinless particles and for spin-1/2 fermions. The problem of solving the differential equation related to the Schrödinger equation is reduced by the Bethe ansatz to a system of algebraic equations. The delta-function interaction is shown to have no effect on spinless fermions which therefore behave like free fermions, in agreement with Pauli's exclusion principle. The ground-state problem of spinless bosons is reduced to an inhomogeneous Fredholm equation of the second kind. In the limit of impenetrable interactions, the spinless bosons are shown to have the energy spectrum of free fermions. The model for spin-1/2 fermions is reduced by the Bethe ansatz to an eigenvalue problem of matrices of the same sizes as the irreducible representations R of the permutation group of N elements. For some R's this eigenvalue problem itself is solved by a generalized Bethe ansatz. The ground-state problem of spin-1/2 fermions is reduced to a generalized Fredholm equation.
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Lan, Xun. "Uncovering Transcription Factor Networks by Integrating One Dimensional ‘Omics and Three Dimensional Chromatin Structure." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338575702.
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Gunnarsson, Annicka, and Siri Ekberg. "Invasion of Privacy : Spam - one result of bad privacy protection." Thesis, Blekinge Tekniska Högskola, Institutionen för programvaruteknik och datavetenskap, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5393.
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Our personal privacy is being eroded from various directions as modern technologies bring lots of new threats towards our personal privacy. Unfortunately, people are often oblivious about it and accept invasion of privacy to a great extent without questions. This thesis is a presentation of our study dealing with privacy violations while using the Internet. It also includes a further investigation about unsolicited bulk email, which is one of many consequences of bad privacy protection. We have also examined the differences between the United States and the European Union and found that the fundamental privacy protection is better in the European Union. We have used different methods to complete this thesis such as studies of literature and articles as well as performing a spam study. Using these methods we have concluded that privacy violations on the Internet is a significant problem and that the Internet users have a right to an adequate privacy protection.
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Siri, Åhman. "Wait, I'm him now? : Identification and choice in games with more than one protagonist." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-15418.
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This study examines correlations between player choice and identification in a multiple protagonist video game, seeking to determine whether a player’s identification with one or more player characters affects the way they make choices while playing. It discusses various definitions and types of identification as well as ways to create a successful narrative with multiple protagonists. The artefact created for the study is a text-based game with a branching narrative, where the player is required to make choices for three different characters, and a qualitative research method based on interviews with a small group of participants. The results show that players seek to identify with the player character even when there are more than one, and often use this as a basis for the choices they make, either by imagining themselves in the situation of the main character or by imagining that they are the main character. They do not usually base their choices while playing as a character on their identification or lack thereof with another, and regardless of how they made choices, most players made more or less the same ones. However, it did show that lack of identification made making choices more difficult for that character, which lessened their enjoyment of that storyline.Artefakten som användes i arbetet utvecklades i samarbete med Amanda Thim
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Higley, Elizabeth. "Nighttime interactions and mother-infant attachment at one year." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 57 p, 2007. http://proquest.umi.com/pqdweb?did=1397907431&sid=15&Fmt=2&clientId=8331&RQT=309&VName=PQD.
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Mason, Philip. "Ultraintense laser-plasma interactions in one and two dimensions." Thesis, University of Essex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324248.
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Park, Michael James. "Diagnosis: Diabetes : an interactive chamber opera in one act." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54249.
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Diagnosis: Diabetes is an interactive one-act chamber opera for five singers (soprano, mezzo-soprano, mezzo-soprano, tenor, baritone) and an instrumental quintet (flute/alto flute, B-flat Clarinet/bass clarinet, violin, cello, and piano). It is approximately 60 minutes in duration with seven scenes and no intermission.
The opera tells the story of Charlie and his relationship with his diabetes. After Charlie’s parents take full responsibility for his diabetes management in childhood, the audience influences the outcome of several scenes by answering the narrator’s multiple-choice questions. The audience’s success in answering these questions dictates whether the following scene has a good or bad outcome. The music of Diagnosis: Diabetes serves to facilitate the posing of questions (from scripted musicians to live audience) and the implementation of multiple dramatic outcomes in a live performance scenario.Arts, Faculty of
Music, School of
Graduate
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Garrod, Barnaby G. "One-dimensional interacting particle systems as Pfaffian point processes." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/81054/.
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A wide class of one-dimensional continuous-time discrete-space interacting particle systems are shown to be Pfaffian point processes at fixed times with kernels characterised by the solutions to associated two-dimensional ODEs. The models comprise instantaneously coalescing or annihilating random walks with fully spatially inhomogeneous jump rates and deterministic initial conditions, including additional pairwise immigration or branching in the pure interaction regimes. We formulate convergence of Pfaffian point processes via their kernels, enabling investigation of diffusive scaling limits, which boils down uniform convergence of lattice approximations to two-dimensional PDEs. Convergence to continuum point processes is developed for a subset of the discrete models. Finally, in the case of annihilating random walks with pairwise immigration we extend the picture to multiple times, establishing the extended Pfaffian property for the temporal process.
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Antonsson, Roger, and Lena Petterson. "Being at one with the tool : applying flow to usability." Thesis, Blekinge Tekniska Högskola, Avdelningen för för interaktion och systemdesign, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1616.
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Communication between people has become more and more important in society today and so has the way to communicate. Our work, which this master thesis is based upon, has been to evaluate and redesign an existing web application that works like a communication tool. To carry out this work we have compiled two questions; how to facilitate the interaction for an application that is used as a tool, focusing on interface design, usability and flow; how can the usability be improved in a system, with help of flow theory. To deal with these two questions we have used a number of methods that have had different kinds of influence of our work. The one that has had the greatest impact of the work with the evaluation has been cognitive walkthrough. For the design we have used literature studies along with the result of the evaluation. A problem during our work has been that the user has not been specified the design should work at a generic group of users. The problem has not been to define the target group rather to suit the interface to everybody. This has been the challenge of this semester and we found designing an interface infusing usability with help from flow as interesting.Kommunikation mellan människor liksom sättet att kommunicera har blivit allt viktigare i samhället idag. Vårt arbete, som magisterarbetet bygger på, har varit att utvärdera och omdesigna en existerande webbapplikation som fungerar som ett kommunikationsverktyg. För att genomföra arbetet har vi utarbetat två frågor; hur förenklas interaktion för en applikation som används som ett verktyg, med fokus på gränssnittsdesign, användbarhet och flow; hur kan användbarheten öka i ett system, med hjälp av flow teorin. För att kunna ta itu med dessa frågor har vi använt ett antal metoder som har påverkat vårt arbete på olika sätt. Den för arbetet med utvärderingen mest betydelsefulla har varit kognitiv genomgång. För designen har vi använt oss av literaturstudier tillsammans med resultatet från utvärderingen. Ett problem under vårt arbete har varit att användarna inte har varit specificerade utan designen bör fungera på en allmän grupp användare. Problemet har inte varit att definiera målgruppen utan snarare att anpassa gränssnittet till alla. Detta har varit en av utmaningarna under denna termin och vi tycker en annan intressant utmaning har varit att designa ett gränssnitt genom att ingjuta användbarhet med hjälp från flow.
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Morgan, Claire Elizabeth. "Unsteady vortex interactions related to a Formula One car front wing and wheel." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608608.
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Montagu, H. E. W. "Interactions effects in weakly confined quasi one-dimensional quantum wire." Thesis, University College London (University of London), 2016. http://discovery.ucl.ac.uk/1521719/.
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Since the initial realisation of split-gate device and quantised plateaus of conductance in one-dimensional quantum wires, there has been immense interest in studying transport through one-dimensional electron systems to investigate many-body effects. This thesis contains results of experiments performed on novel discrete quantum devices with potential for tuning the confinement as well as the electron density to investigate many-body effects and electron-electron interactions in weakly confinement quantum wires. This thesis covers a detailed development of technology for fabricating novel discrete quantum devices consisting of mid-line, top and back gates patterned along with standard split-gates devices. A novel mid-line gated, split gates device demonstrates the possibility of creation of two lateral one-dimensional quantum wires in a single two-dimensional electron gas (2DEG). This allows the systematic investigation of interaction effects between the quantum wires. Several measurements are performed to further characterise such laterally created quantum wires system in detail. It is also shown that the two one-dimensional quantum wires created out of a single 2DEG exhibit finite coupling between them as a function of mid-line gate thickness. This coupling manifested itself through crossing and anti-crossing of the subbands. The thesis also covers experimental investigations performed on a weakly confined, low-density quasi-one-dimensional system which was achieved by developing novel back-gated split-gate devices. The thesis presents the possible experimental evidence of two interaction phenomena which occur in the low-density regime such as spontaneous spin polarisation and spin-incoherent transport in one-dimensional quantum wires. The experimental evidence of spin-incoherent transport can be seen in the form of a conductance plateau at 0.5(2e^2/h) at very low electron density, whereas the spontaneous spin polarisation shows an additional plateau at 0.5(2e^2/h) along with plateau (2e^2/h). The experimental results presented in the thesis give an important insight and advances in the research of many-body physics in one-dimensional quantum wires.
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Wang, Yongxing. "A one-field fictitious domain method for fluid-structure interactions." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/21218/.
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We present a one-field fictitious domain method (FDM) for simulation of general fluid-structure interactions (FSI). "One-field" means only one velocity field is solved in the whole (fluid and solid) domain based upon the finite element interpolation. The proposed method has the same generality and robustness as the FDM with a distributed Lagrange multiplier (DLM): both of them solve the fluid equations and solid equations as one system. However the one-field FDM only needs to solve for one velocity field while the FDM/DLM usually solves for fluid velocity, solid displacement and Lagrange multiplier. The proposed one-field FDM also has similar features with immersed finite element methods (IFEM): the explicit or implicit IFEM places all the solid information in a FSI force term which is arranged on the right-hand side of the fluid equations. The one-field FDM assembles the solid equations and implicitly includes them with the fluid equations. What we achieve is theoretically equivalent to an implicit IFEM but avoiding convergence problems, and a wide range of solid parameters can be considered in this scheme. In short, the one-field FDM combines the FDM/DLM advantage of robustness and the IFEM advantage of efficiency. In this thesis, we present a thorough review, summary and categorization of the existing finite element methods for FSI problems. The finite element weak formulation of the one-field FDM and discretization in time and space are introduced, followed by a stability analysis by energy estimate. The proposed scheme is first implemented in implicit form, followed by numerical validation for the property of non-increasing energy under the conditions of $\rho^f\le\rho^s$ (densities of the fluid and solid respectively) and $\nu^f\le\nu^s$ (viscosities of the fluid and solid respectively), and numerical tests for stability under the conditions of $\rho^f>\rho^s$ and/or $\nu^f>\nu^s$. The proposed scheme is then implemented based upon three explicit splitting schemes: 2-step splitting, 3-step splitting and 4-step splitting scheme. The fully coupled implicit FSI system is decoupled into subproblems step by step, which can be effectively solved. The pros and cons of these splitting schemes are analysed followed by a selection of numerical tests in order to illustrate the capabilities and range of applicability of the proposed one-field FDM scheme. The thesis concludes with a presentation of some topics and open problems that may be worthy of further investigation.
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Vaillant, Christophe Louis J. "Long-range interactions in one- and two-electron Rydberg atoms." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/10594/.
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We present calculations of long-range interactions in Rydberg atoms, with a focus on the dipole-dipole interactions of strontium Rydberg states. The growing use of Rydberg states in the field of cold atoms necessitates a more detailed understanding of the effects of dipole-dipole interactions, which are currently being investigated in a number of research groups worldwide. Calculations of long-range interactions in Rydberg states of caesium, cal- cium, rubidium, strontium and ytterbium are presented. By taking the one active electron approximation we develop consistent models of these long- range interactions, and construct a survey of the Rydberg state dipole-dipole interactions and quadrupole-quadrupole interactions. We compare the inter- actions between series and between atoms, highlighting the importance of certain series for applications suggested in previous works. In order to include two-electron effects in the description of dipole-dipole interactions in divalent atoms, we use multichannel quantum defect theory (MQDT) to develop models of the Rydberg series of strontium. We use an empirical reactance matrix formalism, where the reactance matrix is fitted to reproduce experimentally measured values of the bound state energy levels. Models are found for all series of strontium with L ≤ 3. We extend the MQDT formalism to the description of the natural radiative lifetimes of strontium, where the perturbers are found to have a large quenching effect on these lifetimes. By incorporating the MQDT description of the Rydberg states of strontium into the calculation of dipole-dipole interactions, we find a spin-forbidden two-atom resonance in the 3D2 states of strontium. We consider a one- dimensional lattice of strontium atoms, and find that the internal dynamics of the Rydberg atoms demonstrates spin transport for large lattice spacings and a separation of the spin and total angular momentum dynamics for small lattice spacings. Spin-angular momentum separation (analogous to spin-charge separation in condensed matter) in strontium Rydberg atoms may have uses in the investigation of one-dimensional Fermi gases and their description using Luttinger liquid theory.
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Miller, Robert John. "An investigation into the unsteady blade interaction in one and a half stage axial flow turbine." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299161.
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Sharp, Timothy Keith Jr. "Examining the Interaction Between the University Interscholastic League One-Act Play Contest and Texas Theatre Curriculum." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1404909300.
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Worrakitpoonpon, T. "Relaxation of isolated self-gravitating systems in one and three dimensions." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00607774.
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La gravit'e newtonienne joue un rˆole essentiel dans l''evolution des objets c'elestes dans l'univers, mais la compr'ehension des syst'emes g'er'es par celle-ci reste encore limit'ee. Dans cette th'ese nous pr'esentons une 'etude th'eorique de la dynamique des syst'emes auto-gravitants 'a une dimension et 'a trois dimensions. La question centrale que nous abordons, en utilisant extensivement des simulations num'eriques, est si la m'ecanique statistique d'ecrit bien leur comportement. 'A une dimension nous proposons d''etudier principalement deux questions: la relaxation vers 'equilibre thermique et la relaxation violente vers des 'etat dit "quasi-stationnaire" (QSS). La premi'ere question consid'ere la relaxation vers un 'etat correspondant 'a l''equilibre thermique dans l'ensemble micro-canonique ou canonique, o'u la solution analytique est connue. Nous introduisons des param'etres d'ordre adapt'es qui permettent de mettre en 'evidence cette relaxation. Plus sp'ecifiquement nous observons que le temps caract'eristique de cette relaxation est corr'el'e avec les fluctuations dans l''etat quasi-stationnaire et est lin'eairement proportionnel au nombre de particules, ind'ependamment de la condition initiale. La deuxi'eme question concerne la relaxation violente 'a partir de conditions initiales vari'ees, et une comparaison avec la th'eorie de relaxation violente de Lynden-Bell. Cette th'eorie d'ecrit avec une bonne approximation les propri'et'es de ces 'etats quasi-stationnaires proche de la limite "d'eg'en'er'ee" ou, plus g'en'eralement, quand la relaxation est "calme". L''echec de la th'eorie est corr'el'e 'a l'emergence de structure "core-halo". Pour terminer nous 'etudions les mˆemes questions sur les syst'emes 'a trois dimensions. Dans le cas g'en'eral la th'eorie de Lynden-bell donne, en absence d'une boˆıte de confinement, une solution de masse infinie. Nous remarquons que la solution est peu sensible 'a la taille de la boˆıte proche de la limite d'eg'en'er'e. Elle peut ˆetre compar'ee aux r'esultats de simulations num'eriques pour le cas (plus physique) o'u le syst'eme est ouvert. Dans ce cas nous observons, comme en une dimension, un bon accord avec la pr'evision th'eorique dans le r'egime proche de la limite d'eg'en'er'ee ou autrement l'apparition de structure "core-halo".
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Akhanjee, Shimul. "Classical and quantum aspects of strongly interacting one-dimensional systems." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1679376391&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
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Artagan, Salih Serkan. "A One-line Numerical Model For Shoreline Evolution Under The Interaction Of Wind Waves And Offshore Breakwaters." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607364/index.pdf.
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A numerical model based on one-line theory is developed to evaluate the wind wave driven longshore sediment transport rate and shoreline change. Model performs wave transformation from deep water through the surf zone and computes the breaking parameters. The formula of longshore sediment transport rate used in the numerical model is selected as a result of comparative studies with the similar expressions and the field measurements. Offshore breakwater module of the numerical model is developed to compute the change of shoreline behind single or multiple offshore breakwaters. The validity of the numerical model was confirmed by comparing model results with the shoreline change given within the sheltered zone behind the offshore breakwaters. A series of offshore breakwaters are hypothetically proposed for a case study where a series of groins were constructed whose numerical model results qualitatively matched well with the field measurements. The results of the influences of offshore breakwaters on the shoreline predicted by the model are discussed comparatively with the case study.
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Ayuninjam, Gwendoline Ibamiwi. "INTERACTION AS A MANIFESTATION OF IDENTITY: UNDERGRADUATE AFRICAN AND AFRICAN AMERICAN STUDENTS AT ONE HISTORICALLY BLACK UNIVERSITY." Lexington, Ky. : [University of Kentucky Libraries], 2008. http://hdl.handle.net/10225/947.
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Thesis (Ph. D.)--University of Kentucky, 2008.Title from document title page (viewed on December 10, 2008). Document formatted into pages; contains: x, 232 p. Includes abstract and vita. Includes bibliographical references (p. 220-230).
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Hughes, Anne Vivienne. "The scholarship of teaching and learning : exploring one person's interaction with the wider TEYL community of practice." Thesis, University of York, 2011. http://etheses.whiterose.ac.uk/14221/.
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This Integrative Chapter outlines how one person's practice reflects the Scholarship of Teaching and Learning (SoTL) principles. It opens with a brief discussion of this career and how the purpose of it of late has been to address the needs of those involved in the TEYL community of practice. The Integrative Chapter then briefly discusses Boyer's work on the Scholarship of Teaching and Learning and, within this discussion, highlights his four functions of the Scholarship of Teaching and Learning, which are: The Scholarship of Discovery The Scholarship of Integration The Scholarship of Application The Scholarship of Teaching (Boyer, 1990) These four functions of the Scholarship of Teaching and Learning create the background against which are presented aspects of this practice and publications to illustrate how they fit within each of these functions. Additionally, within each function, there are descriptions of the publications submitted, and, where relevant, the overlapping and linked work on the Masters in Teaching English to Young Learners. Discussion further illustrates how this practice particularly focuses on addressing the needs of those in the TEYL community of practice, including young learners, teachers, teacher trainers, teaching associations and publishers. Within the Integrative Chapter is shown the way in which, within the spirit of the Scholarship of Teaching and Learning, this career has tried to address gaps in the provision of continuing professional development courses for those involved in Teaching English to Young Learners (TEYL) and for other professional needs within the field of TEYL and the wider TEYL community of practice.
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Botzung, Thomas. "Study of strongly correlated one-dimensional systems with long-range interactions." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAF062.
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Durant cette thèse, nous étudions des systèmes unidimensionnels avec des couplages longue-portée. Dans la première partie, nous démontrons que ces couplages entraînent une décroissance algébrique des corrélations dans des fils quantiques désordonnés. Deuxièmement, nous analysons un modèle étendu de Hubbard où les particules interagissent via un potentiel « soft-core » générant de nouvelles phases exotiques. Dans le troisième chapitre, nous démontrons que restaurer l’extensivité a une influence sur les propriétés de basse énergie de modèle quantique dans la limite thermodynamique. Finalement, nous présentons des résultats préliminaires sur la modification de la localisation d’Anderson en présence d’un couplage avec une cavitéDuring this Ph.D., we studied one-dimensional systems with long-range couplings. In the first part, we demonstrate that power-law couplings lead to an algebraic decay of correlations at long distances in disordered quantum wires. In the second chapter, we analysed an extended Hubbard model where particles interact via a finite-range potential that induces frustration and new exotic phases. In the third chapter, we demonstrated that restoring energy extensivity has an influence on the low-energy properties of quantum model in the thermodynamic limit. Finally, we provide preliminary results on the modification of Anderson localization due to the coupling to a cavity mode
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Moore, Sarah Renee Edwards. "Volunteer Tutors and Adolescent at risk English Language Learners: The nature of interactions among volunteer tutors and at risk ELLs in one-on-one tutoring sessions." Diss., Temple University Libraries, 2015. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/359540.
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Literacy & LearnersPh.D.
This qualitative case study examined how volunteer tutors are interacting with at-risk adolescent ELL students in one-on-one tutoring sessions. This study also investigated how volunteer tutors are supporting vocabulary acquisition within tutoring sessions with adolescent ELLs. As a non-participant observer, I used ethnographic methods, including observations, interviews, and document analysis to understand how three tutors were interacting in sessions and how they were supporting vocabulary acquisition over seven weeks. The following questions guided the research: How do volunteer tutors interact in one-on-one tutoring sessions with at-risk adolescent ELLs? How are volunteer tutors supporting vocabulary acquisition for adolescent ELLs in one-on-one tutoring sessions? Data were analyzed to determine how volunteer tutors were interacting in sessions and supporting vocabulary. Six themes emerged to explain how tutors were interacting in sessions and three ‘a-priori’ themes explained how tutors were supporting vocabulary acquisition. The results of this study are used to inform schools who institute volunteer tutoring programs for at-risk populations, researchers interested in vocabulary acquisition and adolescent ELLs, and faculty or staff members who work with at-risk populations. Furthermore, recommendations for future research are discussed for the field of education.
Temple University--Theses
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Osberg, Brendan [Verfasser], and Ulrich [Akademischer Betreuer] Gerland. "One-dimensional lattice gasses with soft interaction : application to nucleosome positioning in yeast / Brendan Osberg. Betreuer: Ulrich Gerland." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1076471889/34.
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De, La Peña-Cortes Jesus Ernesto. "Development of fluid-solid interaction (FSI)." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/development-of-fluidsolid-interaction-fsi(b22b29e2-0349-44a9-ab18-eeb0717d18c8).html.
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This work extends a previously developed finite-volume overset-grid fluid flow solver to enable the characterisation of rigid-body-fluid interaction problems. To this end, several essential components have been developed and blended together. The inherent time-dependent nature of fluid-solid interaction problems is captured through the laminar transient incompressible Navier-Stokes equations for the fluid, and the Euler-Newton equations for rigid-body motion. First and second order accurate time discretisation schemes have been implemented for the former, whereas second and third order accurate time discretisation schemes have been made available for the latter. Without doubt the main advantage the overset-grid method offers regarding moving entities is the avoidance of the time consuming grid regeneration step, and the resulting grid distortion that can often cause numerical stability problems in the solution of the flow equations. Instead, body movement is achieved by the relative motion of a body fitted grid over a suitable background mesh. In this case, the governing equations of fluid flow are formulated using a Lagrangian, Eulerian, or hybrid flow description via the Arbitrary Lagrangian-Eulerian method. This entails the need to guarantee that mesh motion shall not disturb the flow field. With this in mind, the space conservation law has been hard-coded. The compliance of the space conservation law has the added benefit of preventing spurious mass sources from appearing due to mesh deformation. In this work, two-way fluid-solid interaction problems are solved via a partitioned approach. Coupling is achieved by implementing a Picard iteration algorithm. This allows for flexible degree of coupling specificationby the user. Furthermore, if strong coupling is desired, three variants of interface under-relaxation can be chosen to mitigate stability issues and to accelerate convergence. These include fixed, or two variants of Aitkenâs adaptive under-relaxation factors. The software also allows to solve for one-way fluid-solid interaction problems in which the motion of the solid is prescribed. Verification of the core individual components of the software is carried out through the powerful method of manufactured solutions (MMS). This purely mathematically based exercise provides a picture of the order of accuracy of the implementation, and serves as a filter for coding errors which can be virtually impossible to detect by other means. Three instances of one-way fluid-solid interaction cases are compared with simulation results either from the literature, or from the OpenFOAM package. These include: flow within a piston cylinder assembly, flow induced by two oscillating cylinders, and flow induced by two rectangular plates exhibiting general planar motion. Three cases pertaining to the class of two-way fluid-interaction problems are presented. The flow generated by the free fall of a cylinder under the action of gravity is computed with the aid of an intermediate âmotion trackingâ grid. The solution is compared with the one obtained using a vorticity based particle solver for validation purposes. Transverse vortex induced vibrations (VIV) of a circular cylinder immersed in a fluid, and subject to a stream are compared with experimental data. Finally, the fluttering motion of a rectangular plate under different scenarios is analysed.
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Sun, Guangyuan. "Stochastic Simulation of Lagrangian Particle Transport in Turbulent Flows." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5838.
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This dissertation presents the development and validation of the One Dimensional Turbulence (ODT) multiphase model in the Lagrangian reference frame. ODT is a stochastic model that captures the full range of length and time scales and provides statistical information on fine-scale turbulent-particle mixing and transport at low computational cost. The flow evolution is governed by a deterministic solution of the viscous processes and a stochastic representation of advection through stochastic domain mapping processes. The three algorithms for Lagrangian particle transport are presented within the context of the ODT approach. The Type-I and -C models consider the particle-eddy interaction as instantaneous and continuous change of the particle position and velocity, respectively. The Type-IC model combines the features of the Type-I and -C models. The models are applied to the multiphase flows in the homogeneous decaying turbulence and turbulent round jet. Particle dispersion, dispersion coefficients, and velocity statistics are predicted and compared with experimental data. The models accurately reproduces the experimental data sets and capture particle inertial effects and trajectory crossing effect. A new adjustable particle parameter is introduced into the ODT model, and sensitivity analysis is performed to facilitate parameter estimation and selection. A novel algorithm of the two-way momentum coupling between the particle and carrier phases is developed in the ODT multiphase model. Momentum exchange between the phases is accounted for through particle source terms in the viscous diffusion. The source term is implemented in eddy events through a new kernel transformation and an iterative procedure is required for eddy selection. This model is applied to a particle-laden turbulent jet flow, and simulation results are compared with experimental measurements. The effect of particle addition on the velocities of the gas phase is investigated. The development of particle velocity and particle number distribution are illustrated. The simulation results indicate that the model qualitatively captures the turbulent modulation with the presence of difference particle classes with different solid loadings. The model is then extended to simulate temperature evolution of the particles in a nonisothermal hot jet, in which heat transfer between the particles and gas is considered. The flow is bounded by a wall on the one side of the domain. The simulations are performed over a range of particle inertia and thermal relaxation time scales and different initial particle locations. The present study investigates the post-blast-phase mixing between the particles, the environment that is intended to heat them up, and the ambient environment that dilutes the jet flow. The results indicate that the model can qualitatively predict the important particle statistics in jet flame.
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Sanders, Erin. "One night in Bangkok : Western women's interactions with sexualized spaces in Thailand." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/12018/.
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Key words: Thailand, sex tourism, sex industry, authenticity, voyeurism, tourist experience Research on sex tourism in Thailand has often focused on western men’s sexual interactions with local women (Cohen, 1982; Enloe, 1989; Brown, 2001), and the sexualized entertainment on offer in eroticized tourist spaces/places is assumed to be aimed at western male tourists (Manderson, 1992; Bowes, 2004). While a number of academics have studied sexualized spaces and venues, little has been written on how and to what extent western women engage with this type of touristic entertainment in the Thai (sex tourism) context (Odzer, 1994; Manderson, 1995; Sikes, 2006). This is despite the fact that the number of female tourists visiting Thailand has increased over the past decade (TAT, 2007), and some evidence suggests that the sex industry in Thailand caters for female tourists (Vorakitphokatorn et al, 1994; Williams et al, 2007). This thesis will argue that western women are curious about the nature of the Thai sex industry, and that some tourist women seek to visually explore sexualized tourist areas as part of their ‘tourist experience’ in Thailand. Sex tourism is a contentious subject area, and investigating the extent to which western women might engage with the sex industry as part of their tourist experience necessitates a critical engagement with theoretical understandings of female sex tourism. The findings suggest that western women’s desire for an authentic tourist experience in Thailand facilitates their entry into sexualized zones. While the history of the sex industry in Thailand has helped to popularize its notoriety, discourses on tourist-oriented sexual spaces suggest that visiting a sexual show is something that is ‘ok’, and further is part of ‘real Thailand’. However, women’s visual engagement with the Others who inhabit these spaces reveals a darker side,and perhaps a voyeuristic desire to visit these venues. While part of their motivation to consume the sex industry stems from their understanding of the sex industry as authentically Thai, their contradictory interpretations of Thai sex workers reveals a darker, more complicated picture. This thesis will examine the lines that divide tourism from sex tourism practices to suggest that consuming difference and the desire to engage with exotic (and erotic) Others underpins all touristic engagements, including tourist interactions with the sex industry. Visual sex tourism practices will be outlined here, and current definitions of sex tourism will be deconstructed to reveal a more complicated picture of tourism/sex tourism practices, which calls for a closer examination of gendered tourism behaviors.
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Tatur, Kevin. "Theoretical studies of long range interactions in quasi-one dimensional cylindrical structures." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003135.
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