1,524 research outputs found

    Qubits supraconducteurs protégés basés sur des modes à haute impédance

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    Les circuits supraconducteurs quantiques constituent une plateforme de pointe pour le traitement de l’information quantique. L’utilisation de ce type de circuits en tant que qubits est en partie motivée par la grande flexibilité avec laquelle ces dispositifs peuvent être fabriqués. Cette flexibilité fait en sorte que les circuits supraconducteurs sont attractifs comme une architecture pour le design des qubits, des amplificateurs, des détecteurs de photons et d’autres dispositifs quantiques. Le domaine des qubits supraconducteurs est en rapide évolution depuis quelques an nées, ce qui a conduit à un certain nombre d’avancées majeures, dont la récente démonstration de la suprématie computationnelle quantique. Cela a été possible en partie grâce à l’introduction de l’architecture de l’électrodynamique quantique des circuits, et du qubit transmon. Le qubit transmon est protégé contre la source de bruit la plus nuisible dans les dispositifs mésoscopiques (bruit de charge), tout en possédant un design simple permettant sa mise en l’échelle. Cependant, malgré le succès retentissant du qubit transmon, d’autres qubits supraconducteurs, tels que le fluxonium et les circuits 0 − π, ont en principe le potentiel d’être plus performants. En particulier, le qubit 0 − π utilise des modes de circuit à haute impédance qui sont réalisés en utilisant de grandes inductances (ou superinductances) afin de rendre le système insensible au bruit de flux. Les superinductances, ainsi que les dispositifs de fluxonium et de 0 − π qubit, sont le principal objet de cette thèse.Abstract: Superconducting quantum circuits are a leading platform for quantum-information processing. Part of the motivation behind using superconducting circuits as qubits lies in the fact that these devices can be engineered with great flexibility. This also makes superconducting quantum circuits attractive as an architecture for building devices that go beyond qubits, such as amplifiers, photon detectors, among others, and for the exploration of the rich physics of quantum optics in new parameter regimes. The field of superconducting qubits has gone through a rapid development in the last fewyears, leading to a number of major breakthroughs including the recent quantum computational supremacy demonstration. This has been possible thanks in part to the introduction of the circuit quantum electrodynamics architecture and the transmon qubit. This qubit combines insensitivity to the most detrimental source of noise in mesoscopic devices (charge noise), with a simple design and scalable fabrication. However, despite the overwhelming success of the transmon qubit, other implementations of superconducting qubits, such as the fluxonium and the 0 p circuits, have the potential to perform better. In particular, the 0 p qubit makes use of high-impedance circuit modes, which are realized using large inductances (or superinductances), in order to render the system insensitive to flux noise. Superinductances, along with the fluxonium and 0 p qubit devices are the main focus of this thesis

    The Chronicle [April 6, 1984]

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    The Chronicle, April 6, 1984https://repository.stcloudstate.edu/chron/3427/thumbnail.jp

    This mountain of clouds

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    Transitions: The Study of a Late Nineteenth Century Minnesota Farmstead During a Period of Agricultural Transition

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    The late 19th century in Minnesota was largely shaped by immigration, and Benton County was no exception. The region was a prime location for families, providing land that was both fertile and abundant. It was common for a couple members of a family to head west first, the rest of the family joining at a later time. Families could find land near each other and stick together in a new country. Benton County boasts a number of farmstead sites from this period of time. In 1873, John Keefe homesteaded one of these farms. Diversity in population was not the only change happening in the region during this time. From the late 19th century to the early 20th century, Minnesota saw a shift in agriculture, with the trend moving from Wheat Monoculture to Dairying and Diversification between 1875 and 1885 (Granger and Kelly 2005). Historical archive research, research of archaeological data, and artifact analysis were all applied to answer the research question: was the Keefe farmstead originally built for a Wheat Monoculture economy, or as part of the shift toward Dairying and Diversification? Through the research involved, we see that the Keefe farmstead was built as a diversified farm, and can also achieve a richer understanding of the Benton County landscape during the late 19th and early 20th centuries

    Animal History in the Modern City

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    Assembling an impressive cast of contributors, this volume employs liminality as a lens through which to study the social and cultural history of animals in the modern city. It includes a variety of case studies, such as the horse-human relationship in the towns of New Spain, hunting practices in 17th-century France, the birth of the zoo in Germany and the role of the stray dog in the Victorian city, demonstrating the interrelated nature of animal and human histories. This is a vital resource for scholars and students interested in animal studies, urban history and historical geography

    Missed connections and silver linings: researching theatre for early years audience experience during the COVID-19 pandemic

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    Live performance designed for under 6s offers an out-of-the-ordinary aesthetic experience for very young children and the adults who bring them. This research draws on our knowledge of how children develop within the context of their closest relationships and brings a focus to how parents experience attending theatre for early years (TEY) with a child aged 12-36 months. Interviews and observations were analysed using Interpretive Phenomenological Analysis, which was found to be a supportive method to meeting the study aims. The digital context, necessitated by the COVID-19 pandemic, offered unique insights into a new form of presentation. The findings show that Zoom theatre offers some mitigation to much missed live performance whilst also highlighting the irreplicable qualities of live, in-person events for families with very young children. There was potential for parent-child bonding found in sharing valued time together, opportunities for empathy, and in connecting to others. In piloting the subject area for PhD, this study found the parent experience of the TEY performance space to be varied, meaningful and rich for further exploration. Further research could include the perspectives of performers and children and investigate relationships at live, in-person events.Live performance designed for under 6s offers an out-of-the-ordinary aesthetic experience for very young children and the adults who bring them. This research draws on our knowledge of how children develop within the context of their closest relationships and brings a focus to how parents experience attending theatre for early years (TEY) with a child aged 12-36 months. Interviews and observations were analysed using Interpretive Phenomenological Analysis, which was found to be a supportive method to meeting the study aims. The digital context, necessitated by the COVID-19 pandemic, offered unique insights into a new form of presentation. The findings show that Zoom theatre offers some mitigation to much missed live performance whilst also highlighting the irreplicable qualities of live, in-person events for families with very young children. There was potential for parent-child bonding found in sharing valued time together, opportunities for empathy, and in connecting to others. In piloting the subject area for PhD, this study found the parent experience of the TEY performance space to be varied, meaningful and rich for further exploration. Further research could include the perspectives of performers and children and investigate relationships at live, in-person events

    Sonship: Biblical Concepts and the Need for Spiritual Father and Son Relationships in the Church

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    This research exposes and explains the biblical concept and purpose of sonship in the church. More specifically, it will illustrate an effective model of the spiritual father and son relationship between pastors and their leaders and followers showing how to duplicate the same patterns according to God’s design for the Church. The rationale for this topic is derived from perceiving the need to address the deficiency in the effective duplication of leadership within the Church. Regarding leadership, much of the Church has neglected or deviated from the need for spiritual fathers to leaders and how this biblical concept and principle is to be used in an effective and legacy-building Church. This research will be approached first by giving historical and current data of the father-like relationship biblical leaders had with their followers and its significance. This research will utilize Scriptural models of relationships between leaders and followers in the Bible to demonstrate how churches can effectively apply this spiritual fatherhood model for the concept of sonship

    Predicting user numbers of an urban fringe Pennine moorland using time and weather variables

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    This study develops and conducts a 15-month, high resolution 24/7 user counting exercise on an area of urban-fringe moorland. The results of this study are discussed and used to predict future land use. The results of this study are compared with results from lower resolution user counts in other wilderness areas. This study was conceived to address a gap in data around recreational moorland use and provide 24/7 data on user numbers in order to develop models to attempt to predict use of urban-fringe moorland from time and weather variables. The data collection strategies utilised were manual counts by an observer, supplemented by Arduino micro-computers and passive infrared sensors. These sensors were designed and developed specifically for the purpose of remote high resolution counting of visitors at low cost, producing reliable 24/7 data for 15-months. Time and synchronous local weather variables at 30 minute, 1 hour, 3 hour and 6 hour resolution were compared with 30 minute moorland user data to assess how these factors affected counts. The study found that the strongest variable affecting visitor counts was daylight. User counts were highest in summer, at weekends and during afternoons. Surprisingly, very little change in user counts was detected during school, bank or religious holidays. Generally, there are trends toward using the moor when temperature is higher and humidity lower. Cloud, visibility, wind chill, wind speed and wind direction had no influence on user counts. User counts, time and weather information were modelled using two approaches: (1) weighting factors and (2) multiple regression. The best model was able to explain 52% of variation in use. The predictive capability of the model increased to 58% during summer and on weekends. Data suggest that there are two groups of users on the moor. A group that have become acclimatised to the prevailing weather conditions and use the area regardless of the weather, this first group will use the moor regularly throughout the week. The second user group is more likely to use the moor during the weekend. These users are more influenced by time and weather factors. An important social discovery was made through anecdotal observation and discussion indicating that the urban fringe moorland is utilised by users beyond the expected dog walkers, hikers and cyclists

    Development of a Web-enabled Spatial Decision Support System (SDSS) for Prevention of Tick Borne Disease in Kuantan, Malaysia

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    Ticks are the second most common vectors of human disease after mosquitoes. They are found on many small mammal hosts and also blood-feed on humans with the risk of transmitting diseases. Considering the diseases’ risks, this study has investigated the potential for a web-enabled spatial decision support system (SDSS) to assist government decision-makers in the control, management of resources and prevention of tick borne diseases specifically in the study area of Kuantan, Malaysia
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