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International Workshop on Technology for Education, T4E

作者： Hazriani Tsuneo Nakanishi Kenji Hisazumi Akira Fukuda Graduate School of Information Science and Electrical Engineering Kyushu University Fukuoka Japan Department of Electronics Engineering and Computer Science Fukuoka University Fukuoka Japan Department of Advance Information Technology Kyushu University Fukuoka Japan

Contextual teaching and learning (CTL) is a promising way for language education, since it can improve performance to learn usage of words and expressions in real conversation or situations. However, implementation of CTL is challenging for teachers since they have to deal with complicated tasks in managing interaction with learners depending on the context, especially in case CTL is provided for the big class. In this paper, the authors propose movie based context-aware language learning that enables contextual self-learning on the movie. Two key concepts, object-oriented context modeling and context-aware quiz generation, are also given. The object-oriented context model is defined to describe the context of the movie scene. The context aware quiz generator of the system produces quizzes based on the description of the context by the object-oriented context model. Preliminary evaluation was conducted to check if the object oriented context model can describe the context of the movie scenes. It is confirmed that the object-oriented context model has enough descriptive power for the movie scenes although it should be improved for less confusion in modeling.

关键词： Context Motion pictures Object oriented modeling Context modeling Computational modeling Learning systems Education

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Highly efficient (11.1%) small molecule multi-junction organic photovoltaic cells

Highly efficient (11.1%) small molecule multi-junction organ...

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2014 IEEE 40th Photovoltaic Specialist Conference (PVSC)

作者： Xiaozhou Che Xin Xiao Stephen R. Forrest Applied Physics Program University of Michigan Ann Arbor MI USA Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI USA

We present multi-junction small molecule organic photovoltaic (OPV) cells with efficiencies over 11%. The devices consist of two or three, vacuum thermally evaporated planar-mixed heterojunction sub-cells with minimal absorption overlap between the cells. By introducing a transparent interconnecting layer, a dual element (tandem) cell achieves a power conversion efficiency of 10.0 ± 0.5%. We further improve the cell performance by adding an additional (3 rd ) sub-cell that absorbs at the second order optical interference maximum within the stack. The triple-junction cell significantly improves the quantum efficiency at shorter wavelengths, achieving a power conversion efficiency of 11.1 ± 0.5%, which to our knowledge, is the highest reported for a multi-junction OPV cell in the scientific literature.

关键词： Absorption Photovoltaic cells Interference Adaptive optics Cathodes Current measurement Optical filters

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Spatial visualization of inductive coupling parameter for optimization of wireless power transfer coils

Spatial visualization of inductive coupling parameter for op...

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IEEE Wireless Power Transfer Conference (WPTC)

作者： Sangyeong Jeong Jingook Kim Seungyoung Ahn Electrical and Computer Engineering Ulsan National Institute of Science and Technology Ulsan South Korea CCS Graduate School for Green Transportation Korea Advanced Institute of Science and Technology Daejon South Korea

A method to visualize the spatial distribution of the self- and mutual-inductances and a coupling parameter between inductive couplers is proposed. Identifying the spatial distribution of the coupling parameter could be useful in optimizing wireless-power-transfer coils, especially when placing ferrite materials or shielding structures.

关键词： Couplings Inductance Magnetic fields Ferrites Graphical models Distribution functions

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Spatial Filter Adaptation Based on the Divergence Framework for Motor Imagery EEG Classification

Spatial Filter Adaptation Based on the Divergence Framework ...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Xinyang Li Cuntai Guan Kai Keng Ang Haihong Zhang Sim Heng Ong NUS Graduate School for Integrative Sciences and Engineering National University of Singapore Institute for Infocomm Research Agency for Science Technology and Research Department of Electrical and Computer Engineering and Department of Biomedical Engineering National University of Singapore

ISBN: (纸本)9781424479276

To address the nonstationarity issue in EEG-based brain computer interface (BCI), the computational model trained using the training data needs to adapt to the data from the test sessions. In this paper, we propose a novel adaptation approach based on the divergence framework. Cross-session changes can be taken into consideration by searching the discriminative subspaces for test data on the manifold of orthogonal matrices in a semi-supervised manner. Subsequently, the feature space becomes more consistent across sessions and classifiers performance can be enhanced. Experimental results show that the proposed adaptation method yields improvements in classification performance.

关键词： Electroencephalography Accuracy Training data Covariance matrices Brain-computer interfaces Convergence Training

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Efficient real-time detection of terahertz pulse radiation by "listening to" photoacoustic generation

Efficient real-time detection of terahertz pulse radiation b...

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Laser science, LS 2014

作者： Chen, Sung-Liang Zhang, Cheng Chang, You-Chia Ok, Jong G. Ling, Tao Mihnev, Momchil T. Norris, Theodore B. Jay Guo, L. Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109 United States Applied Physics Program University of Michigan Ann ArborMI48109 United States Department of Mechanical Engineering University of Michigan Ann ArborMI48109 United States University of Michigan Shanghai Jiao Tong University Joint Institute Shanghai200240 China

We demonstrate real time terahertz detection based on its absorption by carbon nanotubes composite and detection of the generated photoacoustic signal. This method has advantages of real time response, compact size an... 详细信息

ISBN: (纸本)1557522863

关键词： Yarn

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Suppressing fast load transients and improving dynamic performance in DC telecom power systems and data centers

Suppressing fast load transients and improving dynamic perfo...

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International Conference on Telecommunications Energy (INTELEC)

作者： Zhenyu Shan Juri Jatskevich Eunseok Cho Moochul Shin Yongkeun Lee Department of Electrical and Computer Engineering The University of British Columbia Vancouver Canada Graduate School of NID Fusion Technology Seoul National University of Science and Technology Seoul Korea

It is envisioned that in future dc power distribution of telecom systems and data centers the smart loads will communicated with sources informing of the changes in operation. This paper presents a strategy based on a pre-energized auxiliary power circuit to suppress fast transients from electronic loads. Since the transient-occurrence time will be informed by the load, the auxiliary circuit will pre-energize the dc bus and will inject additional current to counteract the change in load and in this way smooth the transient. In this paper, the design and operation principle of the proposed auxiliary circuit is explained. The proposed approach is verified in a dc microgrid model with 380 VDC and 24 VDC buses and is shown to be very effective in suppressing the load transients.

关键词： Transient analysis Topology Capacitors Rectifiers Switches Power supplies

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Flor Revisited(Again):eQTL and Mutational Analysis of NB-LRR Mediated Immunity to Powdery Mildew in Barley

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Journal of Integrative Agriculture 2014年第2期13卷 237-243页

作者： Roger Wise Priyanka Surana Greg Fuerst Ruo Xu Divya Mistry Julie Dickerson Dan Nettleton Corn Insects and Crop Genetics Research Unit U.S.Department of Agriculture-Agricultural Research ServiceIowa State UniversityAmesIowa 50011USA Department of Plant Pathology & Microbiology Center for Plant Responses to Environmental StressesIowa State UniversityAmesIowa 50011USA Bioinformatics and Computational Biology Graduate Program Iowa State UniversityAmesIowa 50011USA Department of Statistics Iowa State UniversityAmesIowa 50011USA Department of Electrical and Computer Engineering Iowa State UniversityAmesIowa 50011USA

Genes encoding early signaling events in pathogen defense often are identified only by their phenotype. Such genes involved in barley-powdery mildew interactions include Mla, specifying race-specific resistance; Rarl （Required for Mla12-specified resistance1）, and Roml （Restoration of Mla-specified resistancel）. The HSP90-SGT1-RAR1 complex appears to function as chaperone in MLA-specified resistance, however, much remains to be discovered regarding the precise signaling underlying plant immunity. Genetic analyses of fast-neutron mutants derived from CI 16151 （Mla6） uncovered a novel locus, designated Rar3 （R_equired for Mla6-specified resitance3）. Rar3 segregates independent of Mla6 and Rarl, and rar3 mutants are susceptible to Blumeria graminis f. sp. hordei （Bgh） isolate 5874 （A VRar）, whereas, wild-type progenitor plants are resistant. Comparative expression analyses of the rar3 mutant vs. its wild-type progenitor were conducted via Barleyl GeneChip and GAIIx paired-end RNA-Seq. Whereas Rarl affects transcription of relatively few genes; Rar3 appears to influence thousands, notably in genes controlling ATP binding, catalytic activity, transcription, and phosphorylation; possibly membrane bound or in the nucleus, eQTL analysis of a segregating doubled haploid population identified over two-thousand genes as being regulated by Mla （q value/FDR=0.00001）, a subset of which are significant in Rar3 interactions. The intersection of datasets derived from mla-loss-of-function mutants, Mla-associated eQTL, and rar3-mediated transcriptome reprogramming are narrowing the focus on essential genes required for Mla-specified immunity.

关键词： eQTL transcript profiling immunity resistance signaling barley Blumeria graminis

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An information sharing method using compressed sensing in wireless distributed networks

An information sharing method using compressed sensing in wi...

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IEEE Globecom Workshops

作者： Shuhei Suzaki Hiraku Okada Kentaro Kobayashi Masaaki Katayama Graduate School of Electrical Engineering and Computer Science Nagoya University Furo-cho Chikusa-ku Nagoya JAPAN EcoTopia Science Institute Nagoya University Furo-cho Chikusa-ku Nagoya Japan

In wireless distributed networks, each node establishes its route autonomously. The optimum route should be selected according to the change in radio propagation environment. Link-state routing is a technique that shares link quality information and selects the optimum route from that information. Flooding is considered as an information sharing method, but it causes a broadcast storm problem. In this paper, to reduce the amount of information that needs to be transmitted, we propose an information sharing method that uses compressed sensing for link quality in wireless distributed networks. We evaluate the reduction effect of transmitting information by using compressed sensing.

关键词： Compressed sensing Wireless communication Wireless sensor networks Decoding Conferences Information management Sparse matrices

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A parallel Remote Center of Motion mechanism for needle-based medical interventions

A parallel Remote Center of Motion mechanism for needle-base...

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IEEE/RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob)

作者： Mostafa Hadavand Michael D. Naish Rajni V. Patel Biomedical Engineering Graduate Program Western University Canadian Surgical Technologies and Advanced Robotics (CSTAR) Lawson Health Research Institute London Canada Department of Mechanical and Materials Engineering Western University Department of Electrical and Computer Engineering Western University

A novel parallel Remote Center of Motion (RCM) mechanism is proposed for a surgical robot designed to perform minimally invasive needle-based interventions for lung cancer diagnosis and treatment. The proposed robot provides four degrees of freedom (DOFs) to orient and move a surgical needle within a spherical coordinate system. The RCM is beneath the skin surface to minimize the invasiveness of the surgical procedure while providing the required workspace. This compact, patient-mounted robot benefits from a design capable of measuring the pure interaction forces between the needle and the tissue. In this paper, the mechanism design and its specifications are described. The kinematic analysis is presented and isotropy of the mechanism for targeting tumors is studied. Finally, the performance of the proposed robot is evaluated experimentally.

关键词： Needles Kinematics Robot kinematics Legged locomotion Joints Cancer

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A feedforward control method of dual-active-bridge dc/dc converter to achieve fast dynamic response

A feedforward control method of dual-active-bridge dc/dc con...

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International Conference on Telecommunications Energy (INTELEC)

作者： Zhenyu Shan Juri Jatskevich Eunseok Cho Moochul Shin Yongkeun Lee Department of Electrical and Computer Engineering The University of British Columbia Vancouver BC Canada Graduate School of NID Fusion Technology Seoul National University of Science and Technology Seoul Korea

A dual-active-bridge (DAB) dc/dc converter may interconnect a battery and a dc grid to achieve UPS or peak shaving functions which bring potential benefits to the power distribution for telecom equipment. Such application requires the DAB converter having fast dynamic response. In this work, a feedforward algorithm is proposed to achieve peak-current-control strategy. The proposed approach can facilitate the converter to generate fast response to reference steps comparing with a traditional PI control method, and does not need the leakage inductance information of transformer comparing with other advanced methods. The simulation result is given to verify the effectiveness and feasibility.

关键词： Feedforward neural networks Bridge circuits Bidirectional control Inductors Batteries Uninterruptible power systems Inductance

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