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On-line Free-viewpoint Video:From Single to Multiple View Rendering

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International Journal of Automation and computing 2008年第3期5卷 257-267页

作者： Vincent Nozick Hideo Saito Graduate School of Science and Technology Keio University

In recent years, many image-based rendering techniques have advanced from static to dynamic scenes and thus become video-based rendering （VBR） methods. But actually, only a few of them can render new views on-line. We present a new VBR system that creates new views of a live dynamic scene. This system provides high quality images and does not require any background subtraction. Our method follows a plane-sweep approach and reaches real-time rendering using consumer graphic hardware, graphics processing unit （GPU）. Only one computer is used for both acquisition and rendering. The video stream acquisition is performed by at least 3 webcams. We propose an additional video stream management that extends the number of webcams to 10 or more. These considerations make our system low-cost and hence accessible for everyone. We also present an adaptation of our plane-sweep method to create simultaneously multiple views of the scene in real-time. Our system is especially designed for stereovision using autostereoscopic displays. The new views are computed from 4 webcams connected to a computer and are compressed in order to be transfered to a mobile phone. Using GPU programming, our method provides up to 16 images of the scene in real-time. The use of both GPU and CPU makes this method work on only one consumer grade computer.

关键词： Video-based rendering (VBR) free-viewpoint video view interpolation graphics processing unit (GPU) webcam stereovision autostereoscopic.

Tool path generation and optimization for freeform surface diamond turning based on an independently controlled fast tool servo

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International Journal of Extreme Manufacturing 2022年第2期4卷 145-160页

作者： Yusuke Sato Jiwang Yan Department of Mechanical Engineering Keio UniversityYokohama 223-8522Japan

Diamond turning based on a fast tool servo(FTS)is widely used in freeform optics fabrication due to its high accuracy and machining *** a new trend,recently developed high-frequency and long-stroke FTS units are independently driven by a separate control system from the machine tool ***,the tool path generation strategy for the independently controlled FTS is far from *** study aims to establish methods for optimizing tool path for the independent control FTS to reduce form errors in a single step of *** from the conventional integrated FTS control system,where control points are distributed in a spiral pattern,in this study,the tool path for the independent FTS controller is generated by the ring method and the mesh method,*** machined surface profile is predicted by simulation and the parameters for the control point generation are optimized by minimizing the deviation between the predicted and the designed *** demonstrate the feasibility of the proposed tool path generation strategies,cutting tests of a two-dimensional sinewave and a micro-lens array were conducted and the results were *** a result,after tool path optimization,the peak-to-valley form error of the machined surface was reduced from 429 nm to 56 nm for the two-dimensional sinewave by using the ring method,and from 191 nm to 103 nm for the micro-lens array by using the mesh method,respectively.

关键词： ultraprecision machining diamond turning fast tool servo freeform surface tool path optimization

Information Super Highway project around keio University

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Information Super Highway Project around Keio University

Context-sensitiveWeb service discovery over the bipartite graph model

1996 International Conference on Information Infrastructure(ICII’96)

作者： Nobuo Saito Faculty of Environmental Information Keio University 5322 EndoFujisawa252 JAPAN

＜正＞This paper shows the current projects summaries relating to Information Super Highway around keio *** are already started,and they will give some insights of the future Japanese information infrastructure *** th...

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Frontiers of Computer Science 2013年第6期7卷 875-893页

作者： Rong ZHANG Koji ZETTSU Yutaka KIDAWARA Yasushi KIYOKI Aoying ZHOU Software Engineering Institute East China Normal University National Institute of Information and Communications Technology keio University

As service oriented architecture(SOA)matures,service consumption demand leads to an urgent requirement for service *** Web documents,services are intended to be executed to achieve objectives and/or desired goals of *** leads to the notion that service discovery should take the“usage context”of service into account as well as service content(descriptions)which have been well *** this paper,we introduce the concept of service context which is used to represent service *** query processing,both service content and service context are examined to identify *** propose to represent service context by a weighted bipartite graph *** on the bipartite graph model,we reduce the gap between query space and service space by query expansion to improve *** also design an iteration algorithm for result ranking by considering service context-usefulness as well as contentrelevance to improve ***,we develop a service search engine implementing this mechanism,and conduct some experiments to verify our idea.

关键词： Web service usage context bipartite graph model context-usefulness

Insert geometry effects on surface roughness in turning process of AISI D2 steel

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第12期11卷 966-971页

作者： Zahari TAHA Hani-kurniati LELANA Hideki AOYAMA Raja Ariffin RAJA GHAZILLA Julirose GONZALES Novita SAKUNDARINI Sugoro B.SUTONO Centre for Product Design and Manufacturing Faculty of EngineeringUniversity of Malaya Department of System Design Engineering Faculty of Science and TechnologyKeio UniversityJapan

Surface roughness is an important parameter for ensuring that the dimension of geometry is within the permitted *** ideal surface roughness is determined by the feed rate and the geometry of the ***,several uncontrollable factors including work material factors,tool angle,and machine tool vibration,may also influence surface *** objective of this study was to compare the measured surface roughness (from experiment) to the theoretical surface roughness (from theoretical calculation) and to investigate the surface roughness resulting from two types of insert,‘C’ type and ‘T’ *** experiment was focused on the turning process,using a lathe machine Colchester *** feed rate was varied within the recommended feed rate *** found that there were large deviations between the measured and theoretical surface roughness at a low feed rate (0.05 mm/r) from the application of both inserts.A work material factor of AISI D2 steel that affects the chip character is presumably responsible for this ***,at a high feed rate (0.4 mm/r),the ‘C’ type insert resulted in 40% lower roughness compared to the ‘T’ type due to the difference in insert *** study shows that the geometry of an insert may result in a different surface quality at a particular level of feed rate.

关键词： Surface roughness Turning Insert geometry Feed rate

Chalcogenide photonic crystal fiber for ultraflat mid-infrared supercontinuum generation

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Chinese Optics Letters 2016年第12期14卷 141-145页

作者： Sandeep Vyas Takasumi Tanabe Manish Tiwari Ghanshyam Singh Department of ECE Vivekananda Institute of Technology (East) Department of EEE Keio University Department of ECE Manipal University Department of ECE Malaviya National Institute of Technology

In this Letter, we numerically simulate the generation of a 1–15 μm mid-infrared supercontinuum（SC） from a highly nonlinear Ge_（11.5）As24Se_（64.5）-based photonic crystal fiber（PCF）. This ultra-broadband SC is achieved in a100 mm long PCF pumped using 85 fs laser pulses operated at 3.1 μm and a peak pulse power of 3 k W. The proposed design offers a flat dispersion profile with two zero dispersion wavelengths. This broad and flat dispersion profile of the Ge_（11.5）As24Se_（64.5）PCF, combined with the high nonlinearity（2474 W-1km-1）, generates an ultra-broadband SC.

关键词： photonic pumped operated broadband nonlinearity numerically soliton silica pumping pitch

Human PBMC-transferred murine MHC class I/II-deficient NOG mice enable long-term evaluation of human immune responses

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Cellular & Molecular Immunology 2018年第11期15卷 953-962页

作者： Tomonori Yaguchi Asuka Kobayashi Takashi Inozume Kenji Morii Haruna Nagumo Hiroshi Nishio Takashi Iwata Yuyo Ka Ikumi Katano Ryoji Ito Mamoru Ito Yutaka Kawakami Division of Cellular Signaling Institute for Advanced Medical ResearchKeio University School of MedicineTokyo 160-8582Japan Department of Dermatology Yamanashi University School of MedicineYamanashi 409-3898Japan Department of Obstetrics and Gynecology Keio University School of MedicineTokyo 160-8582Japan Central Institute for Experimental Animals Kanagawa 210-0821Japan

Immunodeficient mice engrafted with human peripheral blood cells are promising tools for in vivo analysis of human patient individual immune ***,when human peripheral blood mononuclear cells(PBMCs)are transferred into NOG(NOD/Shi-scid,IL-2rg null)mice,severe graft versus host disease(GVHD)hinders long term detailed *** of human PBMCs into newly developed murine MHC class I-and class II-deficient NOG(NOG-dKO;NOG-Iab,B2m-double-knockout)mice showed sufficient engraftment of human immune cells with little sign of *** with influenza vaccine resulted in an increase in influenza-specific human IgG Ab,indicating induction of antigen-specific B cells in the NOG-dKO *** with human dendritic cells pulsed with HLA-A2 restricted cytomegalovirus peptide induced specific cytotoxic T cells,indicating the induction of antigen-specific T cells in the NOG-dKO *** cell therapies(ACTs)using melanoma antigen recognized by T cells(MART-1)-specific TCR-transduced activated T cells showed strong tumor growth inhibition in NOG-dKO mice without any sign of GVHD accompanied by preferential expansion of the transferred MART-1-specific T *** using cultured human melanoma infiltrating T cells also showed anti-tumor effects against autologous melanoma cells in NOG-dKO mice,in which changes in human cancer phenotypes by immune intervention,such as increased CD271 expression,could be ***,NOG-dKO mice are useful tools for more detailed analysis of both the induction and effector phases of T-cell and B-cell responses for a longer period than regular NOG mice.

关键词： adoptive cell therapy humanized mouse vaccine

Who Is Hikonyan？ The Phenomenon of Japanese Yuru-Chara

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Sociology Study 2016年第12期6卷 775-782页

作者： Jillian Rae Suter keio University Japan

In 2007, Hikonyan was the first winner of the Japan-wide ＂yuru-chara＂ or ＂yurui mascot character＂ competition. Since then,yuru-chara, or unsophisticated characters, have become a part of the mascot character marketing industry worth over a billion Japanese yen. However, they have not expanded far outside of Japan. This paper looks at yuru-chara through articles,documentation, literature, and interviews to explore their history and status in Japan, and attempts to explain their rapid rise within the country as well as their lack of presence outside of the country. These resources help explain the design choices of yuru-chara, the reasoning behind those choices, and what they mean within Japan＇s society. They additionally explain how yuru-chara impact the Japanese market. The paper also explores some Japanese branding and how yuru-chara can fit into the concept of the Cool Japan project. Finally, it explores some possibilities of expanding the concept of yuru-chara tointernational markets and how they could successfully work abroad.

关键词： Cool Japan, branding, authenticity, international markets, mascot characters

From Workflow to Interworkflow

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Wuhan University Journal of Natural Sciences 2001年第Z1期6卷 63-71页

作者： Kenichi Okada 1, Haruo Hayami 2, Kimiyo Sagehashi 3 1 Department of Information and Computer Science, Faculty of Science & Technology keio University 3 14 1Hiyoshi, Kohoku ku,Yokohama 223 8522, Japan 2 Department of Information and Computer S Department of Information Science Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama 223-8522 Japan

Workflow management systems are being introduced in many organizations to automate the business process. The initial emphasis of introducing a workflow management system is on its application to the workflow in a given organization. The next step is to interconnect the workflow across organizations. We call it interworkflow, and the total support technologies, which are necessary for its realization, interworkflow management mechanism. Interworkflow is being expected as a supporting mechanism for Business to Business Electronic Commerce. We had proposed this management mechanism and confirmed its realization with the prototype. At the same time, the interface and the protocol for interconnecting heterogeneous workflow management systems has been standardized by the WfMC. So, we advance the project of the implementation of interworkflow management system for the practical use and its experimental proof.

关键词： workflow interworkflow business to business electronic commerce WfMC