206 research outputs found

    A super-Ohmic energy absorption in driven quantum chaotic systems

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    We consider energy absorption by driven chaotic systems of the symplectic symmetry class. According to our analytical perturbative calculation, at the initial stage of evolution the energy growth with time can be faster than linear. This appears to be an analog of weak anti-localization in disordered systems with spin-orbit interaction. Our analytical result is also confirmed by numerical calculations for the symplectic quantum kicked rotor.Comment: 4 pages, 2 figure

    An assessment of geospatial technologies as used for wildland fire suppression

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    Wildland fire fighting is complex due to climatic variation, risk and uncertainty, and the proximity of human and resource values. Information about fire environments, resource availability and logistics, fire behavior, and values at risk are important issues fire managers must consider in allocating scarce resources. Improved information thus, has value in reducing risk and costs and damages. Geospatial technology, which includes remote sensing tools, geographic positioning systems (GPS), geographic information systems (GIS) and various maps are widely used in wildland fire management. My research evaluates geospatial tools in three different ways: their role in risk reduction, their effect on wildland fire costs and damages, and wildland fire managers’ perceived costs and benefits. A theoretical model was developed to analyze the role of geospatial tools in reducing the risk. Risk-averse fire managers were found to use more geospatial technologies compared to those who did not incorporate risk in their decision making, resulting in a creation of value for these technologies. A simultaneous equation system of fires was estimated using the two-stage and the three-stage least squares estimation methods to examine the impact of geospatial tools on fire size, cost and damages. The effect of geospatial technology on fire size was significant in the Full Response Zone. Fire size was positively related to drought and duff moisture codes. Damages and cost of suppression were not affected significantly by the use of digitized maps. The survey of wildland fire managers revealed that geospatial tools are useful in integrating information and provide more clarity, flexibility and accuracy in decision-making. It was also discovered in the survey that geospatial tools are most commonly used when multiple fires are burning at the same time and threatening high resource values. Overall, the findings from this research indicated that risk-averse fire managers use geospatial tools more intensively; that maps play a significant role in reducing the fire size in the Full Response Zone, and, finally, the fire managers’ view that these technologies are more economically efficient in the Full Response Zone makes a case for more investment in developing and employing them on fires. Record keeping and data collection as well as understanding the human element in terms of risk aversion will be important for future studies and for adopting new technology and allocating resources efficiently

    Forecasting the Onset of Cybersickness using Physiological Data

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    指導教員:Machael Vallancethesi

    Making a case for English for Specific Purposes

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    With regard to teaching approaches in the classroom, as new ideas emerge, conflicts in ideology between researchers also surface and the teacher or administrator is left with a difficult decision. In English for Specific Purposes (ESP), a continuing debate is whether, at the tertiary level of education, the teacher should be focusing on English for General Academic Purposes (EGAP) with the goal of imparting general skills that one hopes are transferable to more field specific course work or whether he/she should be teaching English for Specific Academic Purposes (ESAP) which emphasizes similar language skills and tasks to those that the students will face in their academic fields. By using a needs analysis tool or tools to determine the skills students need in a specific field and further analyzing those skills to determine the language needs that the teacher must focus on in the classroom, a teacher or administrator can make an informed decision. This process is exemplified with a case study of implementing a business English class at a large research university in the United States. The results of this analysis indicate that an EGAP approach for upper-level undergraduates and especially graduate students is not meeting these students' specific needs. In addition, the language needs that are identified are such that the teacher would not require specific content knowledge, as the arguments against ESAP suggest, to teach the class.departmental bulletin pape

    Addressing curricular innovation in a multi-stakeholder environment: Planning to change

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    As language innovations move outside the boundaries of autonomous departmental units, the process of change through the planning, design and implementation phases become more complex. Therefore, there is a greater need for awareness of the steps in the innovation process. This is especially true for the planning process since the adoption decision is divided amongst potentially numerous potential adopters. This paper will present a case study of curricular innovation, a move from an EAP to an EBP class, to highlight and discuss the necessary process with initiating curricular innovation in a diverse adoption decision-making environment. The initial planning stage of the innovation process is often a top-down model for managing change that tends to deemphasize the planning process. A different model for planning change is needed for this diverse context. While this case study is content specific, a general framework for managing the planning process will be applicable to various contexts.departmental bulletin pape

    Characteristics of the Description at the Miyako Rinsen Meishou Zue

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    京都芸術大学博士2019年度doctoral thesi

    The design wave height on the coast of AKITA

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    17KJ00003571917論文Articledepartmental bulletin pape

    Observation of the Identical Rigidity Dependence of He, C, and O Cosmic Rays at High Rigidities by the Alpha Magnetic Spectrometer on the International Space Station

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    We report the observation of new properties of primary cosmic rays He, C, and O measured in the rigidity (momentum/charge) range 2 GV to 3 TV with 90×106 helium, 8.4×106 carbon, and 7.0×106 oxygen nuclei collected by the Alpha Magnetic Spectrometer (AMS) during the first five years of operation. Above 60 GV, these three spectra have identical rigidity dependence. They all deviate from a single power law above 200 GV and harden in an identical way.Peer Reviewe
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