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      • (The) challenges of integration : acculturative stress among Korean and Japanese Canadians

        Remi, Langevin Graduate School of International Studies, Korea Un 2019 국내석사

        RANK : 247359

        This study aims to contribute to the field of Asian Canadian studies by researching the acculturative stress of Korean and Japanese Canadians. It also seeks to uncover possible issues, which are largely unnoticed by the majority, in integrating East Asian into the Canadian population. While acculturative stress can be made up of multiple combinations of indicators, this study is attempted to discover what are the significant variables between perceived discrimination, perceived hate, homesickness, stress due to change, fear, and guilt. To do so, an online survey was filled by 55 individuals of Korean and Japanese origins in their twenties living in Canada’s three main cities, Montreal, Toronto, and Vancouver. By using a factor analysis, it was discovered that in both population groups, perceived discrimination (34.09 percent of the variation for Koreans, and 44.31 percent for Japanese), homesickness (28.58 percent for Koreans, 26.93 percent for Japanese), and perceived hate (18.02 percent, and 12.9 percent respectively) were the variables who were found to be responsible for the highest variation of acculturative stress in members of the studied sample. Furthermore, their coefficients showed that perceived discrimination was the highest out of all the variables with 9.8882 for Koreans and 9.527707 for Japanese. The studied literature and the results of this thesis shows that the Canadian government, and other organizations, could push for more awareness of issues lived by Asian immigrants and improve their situation.

      • High space-bandwidth wavefront sensing by sampling and spatial multiplexing

        Tumbar, Remy University of Illinois at Urbana-Champaign 2001 해외박사(DDOD)

        RANK : 247358

        소속기관이 구독 중이 아닌 경우 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        Interferometric optical phase sensors (wavefront sensors) are used in many of today's high technology industries such as semiconductor processing and data storage. However, their vibration sensitivity and difficulty in achieving real-time detection hamper the wider use of these sensors. The sampling field sensor (SFS) has been proposed previously to solve these problems [Remy Tumbar, “Field Sampling and Shearing Wavefront Sensors,” M.S. in Electrical and Computer Engineering, Urbana, Illinois, 1998]. This work further develops the SFS concept and investigates, through numerical and experimental tests, the design of an SFS with free-space diffractive fan-out. Finally, a dramatically improved SFS design, which uses birefringent elements to do the fan-out, is described and tested. The SFS is a breakthrough concept in wavefront sensor design. It is, to our knowledge, the first high-accuracy, high-resolution, vibration-insensitive, one-shot wavefront sensor. It achieves high accuracy by using a phase-shift shearing interferometric approach in detecting wavefront phase differences. It achieves high resolution by sampling the input wavefront and fanning out the samples to the output plane (space multiplexing), on a common optical path. The common path fan-out configuration makes the system compact and vibration-insensitive.

      • Group 10 Methyl Transfer Reactions toward Catalyst Development for Oxidative Oligomerization of Methane

        Remy, Matthew Sean University of Michigan 2011 해외박사(DDOD)

        RANK : 247343

        소속기관이 구독 중이 아닌 경우 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        One of the challenges of developing a homogeneous catalyst for oxidative oligomerization of methane (OOM) is promoting a C-C coupling reaction from the product of alkane C-H activation. Heterolytic C-H activation of methane almost exclusively generates a monoalkyl-metal species. In order to make a new C-C bond, it is proposed that a polymethyl intermediate must be generated. Our studies showed that aryl disproportionation is far more favorable than methyl disproportionation. Careful tuning of ancillary ligands at monomethyl-palladium(II) complexes using density functional theory (DFT) calculations facilitated optimization of thermodynamics for methyl disproportionation. This allowed the first observed disproportionation reaction to form a dimethyl-palladium(II) complex. Heating dimethyl complex (tBu-bpy)Pd II(CH3)2 (tBu-bpy = 4,4'-ditertbuty1-2,2'-bipyridine) to 100 °C produced a mixture of methane and ethane over 24 h. One-electron oxidants and 1,4-benzoquinone were found to be effective promoters of ethane formation from (tBu-bpy)Pd II(CH3)2 at 25 °C. Mechanistic study of one-electron oxidation uncovered an oxidatively-induced methyl transfer reaction which produced ethane from [(tBu-bpy)Pd IV(CH3)3(solvent)r+. Subsequently, one-electron oxidation of complexes of the general formula ( tBu-bpy)PdII(CH3)X was developed as an effective method for generation of ethane from monomethyl-palladium(II) complexes. Platinum complexes, (N-N)PtII(CH3)2, similarly undergo one-electron to produce [(N-N)PtIV(CH 3)3(solvent)]+. However, these platinum(IV) products are generally stable to reductive elimination of ethane. When the N-N ligand is designed to have steric interactions with axial ligands of platinum(IV), ethane reductive elimination becomes favorable, occurring cleanly over 8.5 hours in acetone and over 1 h in dichloromethane. This document describes experimental evidence for the generation of polymethyl palladium and platinum complexes from model palladium(II) and platinum(I) products of C-H activation subsequent ethane elimination from the polymethyl complexes. In an unrelated project, N-insertion into palladium-carbon bond was observed when palladium(II) complexes of bidentate C-N ligands were reacted with an iminoiodinane oxidant. The reaction was proposed to occur through an imido-palladium(IV) intermediate.

      • How to teach a new robot new tricks - an interactive learning framework applied to service robotics

        Remy, Sekou L Georgia Institute of Technology 2009 해외박사(DDOD)

        RANK : 247343

        소속기관이 구독 중이 아닌 경우 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        The applications of robotics are changing. Just as computers evolved from the realm of research and extreme novelty tools to now becoming essential components of modern life, robotics is also making a similar transition. With the changes in applications come changes in the user base of robotics. These users will span a broad range of society, but there are some key properties that can be used to characterize them. First, they more often than not will not be the designers of the robots. Second, they will not have robot control as their primary task while operating the robot. Third, they will not have the resources or the desire to provide all the training that the robot will require, yet they will have the need to fine tune robot performance to their specific needs. Fourth, they will want to use multiple modes of interaction to make the robot accomplish the primary task. Fifth, they will expect and demand that the robot remain safe at all times (safe to humans, pets, or personal property) and expect the robot to be a readily replaceable appliance (cheap). Sixth, they will expect that the robot will be intelligent, at least in the confines of the task at hand. These are some of the key properties that will exist for the new user base. To address some of the needs that will arise because of these properties, we propose work that enables behavior transfer from teacher to robotic student that is facilitated through observation and interaction. Many users in the projected user base will not have exposure to the technologies that enable robotic operation. These users will however have some degree of understanding of how they would like the robot to provide assistance in accomplishing the task. The goal of this work is specifically to enable the user to transfer this understanding to the robot, and have the robot acquire this understanding via interactive learning. To make interactive learning possible via interaction we believe that the robot will have to be able to perform some degree of self regulation. Further, since it is assumed that the user will not have access to the robot's internal mechanisms, the robot will also have to be able to properly manage the knowledge it acquires over time and to verify and validate its understanding periodically. Scaffolding, a method in which teachers provide support while the student learns to master portions of a task, is likely to be the primary method to facilitate this process. This research will undertake study of coherence and its relevance to learning by observation. It will also implement the components that would enable a robot to learn to perform a small set of tasks and demonstrate them in various settings. For this work a robot will be defined as a hardware platform upon which a software agent operates. It is our desire that this software agent will be equipped to operate on any platform and learn any task that a human could perform with the same resources. Demonstrations of this research will highlight service robotics, with emphasis on assistive applications.

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