通信情報システム専攻 2012年度談話会の概要


第1回(※英語開催)
日  時: 4月20日(金) 16:30-18:00
場  所:学術情報メディアセンター南館 マルチメディア講義室202講義室 (http://www.media.kyoto-u.ac.jp/access/index.html#s_bldg 参照。南館館内拡大図もご参照下さい。) / 生存圏S-143H遠隔講義室 / 京都大学YRPモバイルラボ (横須賀)
※YRPで聴講される場合は世話人までご一報下さい
:BUSCEMI, Francesco(Designated Associate Professor, Institute for Advanced Research and Graduate School of Information Science, Nagoya University(名古屋大学情報科学研究科・高等研究院))
講演題目:All entangled quantum states are nonlocal
概  要
In this talk, we will study the interconversion of quantum states by means of local operations and shared randomness (LOSR), departing from the usual paradigm of local operations and classical communication adopted in entanglement theory. A set of necessary and sufficient conditions for the existence of an LOSR-type transformation between two given quantum states will be given in terms of the payoff they yield in a suitable class of nonlocal games. I will show that, as a consequence, such a class of nonlocal games is able to witness quantum entanglement, however weak, and reveal nonlocality in any entangled quantum state. I will also illustrate this fact with an explicit example.

第2回(※英語開催)
日  時: 5月25日(金) 16:30-18:00
場  所:学術情報メディアセンター南館 マルチメディア講義室202講義室 (http://www.media.kyoto-u.ac.jp/access/index.html#s_bldg 参照。南館館内拡大図もご参照下さい。) / 生存圏S-143H遠隔講義室 / 京都大学YRPモバイルラボ (横須賀)
※YRPで聴講される場合は世話人までご一報下さい
:Ji GU(Program-Specific Researcher, Onodera Laboratory, Graduate School of Informatics, Kyoto University)
講演題目:Design of Low-Power Instruction Cache Hierarchy for Embedded Processors
概  要
Cache memories are usually the most energy-consuming components on the processor chip due to their large die size occupation and frequent access operations. In this talk, we focus on the instruction supply path of microprocessor and present our novel application-specific design techniques for the low-power instruction cache hierarchy. The proposed optimization techniques are targeted at multiple parts of the hierarchy, in an attempt to reduce power/energy consumption in the cache components at different levels and the interconnections (bus) between these components.

第3回(※英語開催)
日  時: 6月15日(金) 16:30-18:00
場  所:学術情報メディアセンター南館 マルチメディア講義室202講義室 (http://www.media.kyoto-u.ac.jp/access/index.html#s_bldg 参照。南館館内拡大図もご参照下さい。) / 生存圏S-143H遠隔講義室 / 京都大学YRPモバイルラボ (横須賀)
※YRPで聴講される場合は世話人までご一報下さい
:Eugenio Realini(Program-Specific Researcher, Onodera Laboratory, RISH, Kyoto University)
講演題目:GPS processing software and web services for geomatics and geosciences
概  要
Global Positioning System (GPS) receivers have become increasingly popular as embedded devices that provide coordinates for personal or vehicle navigation. Nevertheless, receiver coordinates are only a product that results from processing the main measurements obtained from GPS, that are satellite-receiver ranges. By using GPS processing software, that can directly process range measurements (i.e. GPS observations), it is possible to perform different tasks, as for example accurate positioning, landslide monitoring, earthquake waveform analysis or atmospheric sensing. GPS processing software can in fact be adjusted to different needs and purposes, or fine-tuned for specific conditions. For example, by processing the receiver observations together with those provided by a network of GPS permanent stations it is possible to increase the positioning accuracy of the receiver. On the other hand, by processing observations from a static receiver of known coordinates, it is possible to measure and monitor some physical quantities related to the atmosphere (e.g. the amount of water vapor). Web services are increasingly adopted solutions in this context, for example to provide remote data to the GPS processing software (e.g. permanent station data), to publish results (e.g. water vapor maps and animations) or to provide the processing itself as a service. In the latter case, the computational load is moved from the measuring receivers (often small handheld devices with limited computation capability) to a server receiving observations, processing them and providing results to the requesting clients. More advanced configurations take advantage of grid/cloud computing services in order process large volumes of data and/or serve a high number of concurrent requests efficiently. This presentation will provide an overview of GPS observation processing, describing hardware and software solutions, the implementation of GPS-related web services and specific case studies.

第4回(※英語開催)
日  時: 7月20日(金) 16:30-18:00
場  所:学術情報メディアセンター南館 マルチメディア講義室202講義室 (http://www.media.kyoto-u.ac.jp/access/index.html#s_bldg 参照。南館館内拡大図もご参照下さい。) / 生存圏S-143H遠隔講義室 / 京都大学YRPモバイルラボ (横須賀)
※YRPで聴講される場合は世話人までご一報下さい
:Fernando Vazquez(Principal Software Engineer, Onodera Laboratory, NTT Open Source Software Center)(フェルナンド・バスケス (NTTオープンソースソフトウェアセンタ, Principal Software Engineer)
講演題目:Networking in the Cloud Era(クラウド時代のネットワーク技術)
概  要
The advent of the so-called cloud (in its various incarnations) and the increasingly wide adoption of virtualization in datacenters are testing the limits of traditional networks. In this talk we will discuss the issues that come from the cloud use case and the virtualization of computing resources (management complexity, lack of predictability, convergence of network and storage, multitenancy, integration of physical and virtual resources, performance of virtualized components) and then present a spate of new technologies that are trying to address them, including SDN (OpenFlow), Edge Virtual Bridging (802.1qbg、802.1qbh), Data Center Bridging and hardware assisted virtualization (PC-SIG SR-IOV).

第5回(※英語開催)
日  時: 10月26日(金) 16:30-18:00
場  所:学術情報メディアセンター南館 マルチメディア講義室202講義室 (http://www.media.kyoto-u.ac.jp/access/index.html#s_bldg 参照。南館館内拡大図もご参照下さい。) / 生存圏S-143H遠隔講義室 / 京都大学YRPモバイルラボ (横須賀)
※YRPで聴講される場合は世話人までご一報下さい
:Kenshi Saho(3rd Grade of Doctor Course, Department of Communications and Computer Engineering, Graduate School of Informatics, Kyoto University)(佐保 賢志 (京都大学情報学研究科 通信情報システム専攻博士後期課程3回生)
講演題目:Human Imaging and Identification using Ultra Wide-Band (超広帯域ドップラーレーダ干渉計法による人体イメージング及び識別)
概  要
Surveillance and monitoring systems in homes, shops, hospitals, cars, etc. are ubiquitous in today’s society. In this talk, we focus on human imaging and identification techniques using ultra wide-band (UWB) Doppler radar for high-performance and simple monitoring systems. I explain the basic UWB Doppler radar techniques and my group’s proposed human imaging method. In our proposed method, human body parts are resolved based on Doppler frequency and range information, and the position of each body part is estimated using interferometry. Moreover, any false images that arise because of interferences are rejected based on velocity information. We have tested out our human imaging method on pedestrians with different gaits and the results show that we achieve real-time human imaging. Shape/motion parameters extracted from the Doppler frequency distribution of the estimated images can be used to identify and classify targets. We show that an accurate classification of pedestrians (e.g., walking with arm-swing, walking without arm-swing, walking with crutches, and walking with a wheelchair) is realized from the extracted parameters. Additionally, we also have tested the technique in closely spaced pedestrians. We verify that image separation and identification of different pedestrians in realistic situations are achieved using our imaging method and a support vector machine algorithm.

第6回(※日本語開催)
日  時: 11月16日(金) 16:30-18:00
場  所:学術情報メディアセンター南館 マルチメディア講義室202講義室 (http://www.media.kyoto-u.ac.jp/access/index.html#s_bldg 参照。南館館内拡大図もご参照下さい。) / 生存圏S-143H遠隔講義室 / 京都大学YRPモバイルラボ (横須賀)
※YRPで聴講される場合は世話人までご一報下さい
上野 賢哉(京都大学 白眉センター 特定助教) (Kenya Ueno(Assistant Professor, The Hakubi Center for Advanced Research, Kyoto University))
講演題目:通信複雑さの理論と論理回路への応用(Communication Complexity Theory with Application to Logic Circuits)
概  要
計算の困難性は様々な場面で通信のボトルネックによって説明することができるが、これは計算に関する基本的問題の解決に非常に有用である。 逆に、ある通信問題に対する効率の良いプロトコルの存在が、計算機システムの高性能な実現を示唆することがある。 本講演では、これらの見方を明らかにするために通信複雑さの理論の基礎的な部分を概説する。 特に、応用例の一つとして論理回路の深さの通信複雑さによる特徴づけを解説する。 Communication bottlenecks reflect computational intractability in various scenarios. They are very useful to solve fundamental problems concerned with computation. Conversely, an efficient protocol for a certain communication problem implies a smart implementation of computer systems. In this talk, I will give an overview of the basic of communication complexity theory to make these concepts clear. In particular, I will explain characterization of depth of logic circuits by communication complexity as an application.

第7回(※英語開催)
日  時: 12月21日(金) 16:30-18:00
場  所:学術情報メディアセンター南館 マルチメディア講義室202講義室 (http://www.media.kyoto-u.ac.jp/access/index.html#s_bldg 参照。南館館内拡大図もご参照下さい。) / 生存圏S-143H遠隔講義室 / 京都大学YRPモバイルラボ (横須賀)
※YRPで聴講される場合は世話人までご一報下さい
:Megumi Kaneko(Assistant Professor, Graduate School of Informatics, Kyoto University)(金子 めぐみ (京都大学 情報学研究科 助教))
講演題目:Superposition Coding in Wireless Relay Systems
概  要
Superposition Coding (SC) with Successive Interference Cancellation (SIC) is known to achieve the capacity of a Gaussian Broadcast channel. In this talk, we will go through the basic information-theoretic results regarding SC for the Gaussian broadcast channel, and present a rate-enhancing SC-relaying scheme for the relay channel. Then, we will consider the case of wireless broadcast relay systems, for which we design SC-based scheduling algorithms that allow simultaneous user transmissions over the same resource unit, as opposed to the conventional scheduling approach that allocates orthogonal resources to each user. Through computer simulations, we will show that the proposed SC-based schemes enable joint throughput and outage improvements compared to conventional schemes. Finally, we will discuss about some practical aspects, namely the implementation of SC-relaying schemes through Hierarchical Modulation (HM).

第8回(※日本語開催)
日  時: 1月25日(金) 16:30-18:00
場  所:学術情報メディアセンター南館 マルチメディア講義室202講義室 (http://www.media.kyoto-u.ac.jp/access/index.html#s_bldg 参照。南館館内拡大図もご参照下さい。) / 生存圏S-143H遠隔講義室 / 京都大学YRPモバイルラボ (横須賀)
※YRPで聴講される場合は世話人までご一報下さい
上川合 直樹(京セラコミュニケーションシステム(株) ICT事業統括本部 事業推進部 企画部 部長) (Naoki Kawai(KYOCERA COMMUNICATION SYSTEMS Co., Ltd. Department Manager ICT Sector Business Planning Group))
講演題目:クラウドコンピューティング最新事例(The latest case study of cloud computing)
概  要
普及の進むスマートデバイス。多くの人がアプリをダウンロードして楽しんでいます。今回は、スマートフォン向けアプリ配信基盤にクラウドを適用した最先端事例をご紹介します。前例のない高度な要求にどう応えたか、しくみづくりの舞台裏とそこで得られた知見を解説します。 Now, smart devices have become widely available and many people download applications and enjoy them. In this talk, I will introduce the most recent case study of cloud computing applied to application delivery platform for smartphones. How have we met the unprecedented high degree of requirements? I will explain "the backstage" of system integration and the knowledge we acquired from the case study.