著者
Hamzah I. H. Manaf Asrulnizam Abd Sidek O.
出版者
一般社団法人 電子情報通信学会
雑誌
IEICE Electronics Express
巻号頁・発行日
vol.6, no.24, pp.1726-1731, 2009
被引用文献数
1

Silicon or glass was a common material for SU8 coating. However, these materials are hard and brittle, make it difficult for drilling and dicing. This paper reported the effect of grayscale and resolution based on the various length of time for Propylene Glycol Methyl Ether Acetate (PGMEA) developing towards SU8-10 coated on polymethylmethacrylate (PMMA). The grayscale results show that the 0% (solid black) produced the highest percentage on the square structure formed to the SU8-10 film coated on PMMA and the highest resolution had been produced for the 30 minutes of PGMEA developing.
著者
YAMAZAKI Hiroshi WAKAZONO Motohiro HOSOKAWA Toshinori YOSHIMURA Masayoshi
出版者
一般社団法人 電子情報通信学会
雑誌
IEICE Transactions on Information and Systems (ISSN:09168532)
巻号頁・発行日
vol.96, no.9, pp.1994-2002, 2013

In recent years, the growing density and complexity of VLSIs have led to an increase in the numbers of test patterns and fault models. Test patterns used in VLSI testing are required to provide high quality and low cost. Don't care (X) identification techniques and X-filling techniques are methods to satisfy these requirements. However, conventional X-identification techniques are less effective for application-specific fields such as test compaction because the X-bits concentrate on particular primary inputs and pseudo primary inputs. In this paper, we propose a don't care identification method for test compaction. The experimental results for ITC'99 and ISCAS'89 benchmark circuits show that a given test set can be efficiently compacted by the proposed method.
著者
長岡 栄
出版者
一般社団法人 電子情報通信学会
雑誌
電子情報通信学会 基礎・境界ソサイエティ Fundamentals Review
巻号頁・発行日
vol.11, no.2, pp.100-107, 2017

航空輸送では安全を最優先の要件とし,リスクに基づく安全管理が行われている.安全向上策として,まず航空機などのシステムの構成要素への安全規格の設定などがある.これには安全リスクが許容可能か否かを判定するため安全性評価が必要である.このため,運用規格と関連した航空機の衝突リスクなど,多くのリスク評価が行われてきた.近年では,こうした構成要素の規格に加え,事故を未然に防止するため,システム全体としての安全管理が義務付けられている.本稿では,航空輸送の分野における安全向上のための方法の変遷を概観し,そこでの安全性評価の方法,安全管理の考え方などを解説する.
著者
山岸 靖明
出版者
一般社団法人 電子情報通信学会
雑誌
電子情報通信学会 通信ソサイエティマガジン (ISSN:21860661)
巻号頁・発行日
vol.2007, no.2, pp.2_128-2_140, 2007-08-25 (Released:2011-06-03)
参考文献数
48

放送通信融合の進展により,複数のネットワークを介して様々なコンテンツ配信サービスが提供されるようになると,それらを利用するホームネットワーク上のコンテンツを再生するデバイスや,配信経路のネットワーク環境が不均一となる.与えられた環境の中で,ユーザの望むコンテンツを効率良く利用させるには,サービス,アプリケーション,及び,デバイス,ネットワークの中から最適なものを選択する必要がある.このマッチングのためのパラメータがそれぞれのメタデータである.本論文では,コンテンツ配信に関連するメタデータ標準についての最近の動向,それらのメタデータを放送通信融合環境で利用する場合の技術課題について解説する.
著者
Rong-Long WANG Li-Qing ZHAO Xiao-Fan ZHOU
出版者
一般社団法人 電子情報通信学会
雑誌
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences (ISSN:09168508)
巻号頁・発行日
vol.E95.A, no.3, pp.639-645, 2012-03-01 (Released:2012-03-01)
参考文献数
24
被引用文献数
1 3

Ant Colony Optimization (ACO) is one of the most recent techniques for solving combinatorial optimization problems, and has been unexpectedly successful. Therefore, many improvements have been proposed to improve the performance of the ACO algorithm. In this paper an ant colony optimization with memory is proposed, which is applied to the classical traveling salesman problem (TSP). In the proposed algorithm, each ant searches the solution not only according to the pheromone and heuristic information but also based on the memory which is from the solution of the last iteration. A large number of simulation runs are performed, and simulation results illustrate that the proposed algorithm performs better than the compared algorithms.
著者
KANG Chang Soon KIM Junsu SUNG Dan Keun
出版者
一般社団法人 電子情報通信学会
雑誌
IEICE transactions on communications (ISSN:09168516)
巻号頁・発行日
vol.92, no.6, pp.2327-2331, 2009-06-01
参考文献数
14
被引用文献数
2

Mutual interference among users can abruptly increase othercell interference and cause overload situation in coexisting WCDMA and HSDPA systems. Traffic overloading can degrade the performance of the systems. This letter proposes a new dynamic downlink load control (DDLC) algorithm to reduce performance degradation due to overload in the coexistence of WCDMA and HSDPA systems. With the proposed algorithm, the downlink load is controlled according to load states classified by two load-control thresholds, and traffic overloading is alleviated by dynamically adjusting the CQI values reported by users, based on the downlink load as well as channel variations. The proposed algorithm is simulated and results show that the DDLC scheme improves the performance of both WCDMA and HSDPA systems in terms of outage probability, total system throughput, and radio resource utilization.
著者
石原 亨
出版者
一般社団法人 電子情報通信学会
雑誌
電子情報通信学会 基礎・境界ソサイエティ Fundamentals Review (ISSN:18820875)
巻号頁・発行日
vol.2, no.3, pp.3_38-3_44, 2009-01-01 (Released:2011-05-01)
参考文献数
29

高度情報化社会の急速な発展を背景にコンピュータシステムの低消費電力化が喫緊の課題となっている.一方でハードウェア設計コストの上昇に伴って,ソフトウェア及びデータコンテンツによるコンピュータ製品の差別化がますます重要になりつつある.結果的にソフトウェアとデータによる低消費電力化はコンピュータシステムの付加価値を生み出す重要な鍵になると考えられる.本論文では,ソフトウェアの動作に関連付けてハードウェアの消費電力をモデル化する技術とハードウェアが電力を消費しないように制御するソフトウェア技術について解説する.
著者
村上 祐子
出版者
一般社団法人 電子情報通信学会
雑誌
電子情報通信学会 基礎・境界ソサイエティ Fundamentals Review
巻号頁・発行日
vol.11, no.3, pp.155-163, 2018
被引用文献数
1

本稿では,人工知能の倫理に関して国内外のガイドライン検討状況をまとめた上で,背景となる倫理学の論点を概説する.
著者
Yoshiaki TANIGUCHI
出版者
一般社団法人 電子情報通信学会
雑誌
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences (ISSN:09168508)
巻号頁・発行日
vol.E100.A, no.11, pp.2547-2550, 2017-11-01 (Released:2017-11-01)
参考文献数
6
被引用文献数
7

We have proposed a fish farm monitoring system for the efficient farming of tuna. In our system, energy efficient and adaptive control of sensor node is highly important. In addition, since a sensor node is attached to the fish, the transmission range of sensor node is not omni-directional. In this paper, we propose a data gathering mechanism for fish farm monitoring by extending a traditional desyncronization mechanism. In our proposed mechanism, by utilizing acknowledgment packets from the sink node, distributed and adaptive timing control of packet transmission is accomplished. In addition, we apply a reassignment mechanism and a sleep mechanism for improving the performance of our proposed mechanism. Through simulation experiments, we show that the performance of our proposed mechanism is higher than that of comparative mechanisms.
著者
Sheng LI Yuya AKITA Tatsuya KAWAHARA
出版者
一般社団法人 電子情報通信学会
雑誌
IEICE Transactions on Information and Systems (ISSN:09168532)
巻号頁・発行日
vol.E98.D, no.8, pp.1545-1552, 2015-08-01 (Released:2015-08-01)
参考文献数
29

The paper addresses a scheme of lightly supervised training of an acoustic model, which exploits a large amount of data with closed caption texts but not faithful transcripts. In the proposed scheme, a sequence of the closed caption text and that of the ASR hypothesis by the baseline system are aligned. Then, a set of dedicated classifiers is designed and trained to select the correct one among them or reject both. It is demonstrated that the classifiers can effectively filter the usable data for acoustic model training. The scheme realizes automatic training of the acoustic model with an increased amount of data. A significant improvement in the ASR accuracy is achieved from the baseline system and also in comparison with the conventional method of lightly supervised training based on simple matching.
著者
Masatoshi NAKAMURA Masato INAGI Kazuya TANIGAWA Tetsuo HIRONAKA Masayuki SATO Takashi ISHIGURO
出版者
一般社団法人 電子情報通信学会
雑誌
IEICE Transactions on Information and Systems (ISSN:09168532)
巻号頁・発行日
vol.E95.D, no.2, pp.324-334, 2012-02-01 (Released:2012-02-01)
参考文献数
15

In this paper, we propose a placement and routing method for a new memory-based programmable logic device (MPLD) and confirm its capability by placing and routing benchmark circuits. An MPLD consists of multiple-output look-up tables (MLUTs) that can be used as logic and/or routing elements, whereas field programmable gate arrays (FPGAs) consist of LUTs (logic elements) and switch blocks (routing elements). MPLDs contain logic circuits more efficiently than FPGAs because of their flexibility and area efficiency. However, directly applying the existing placement and routing algorithms of FPGAs to MPLDs overcrowds the placed logic cells and causes a shortage of routing domains between logic cells. Our simulated annealing-based method considers the detailed wire congestion and nearness between logic cells based on the cost function and reserves the area for routing. In the experiments, our method reduced wire congestion and successfully placed and routed 27 out of 31 circuits, 13 of which could not be placed or routed using the versatile place and route tool (VPR), a well-known method for FPGAs.