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An Adaptive Message Suppression Method for Vehicular DTN
Get PDFapplication/pdf論文(Article)In Vehicular Delay/Disruption/Disconnection Tolerant Networking (DTN), network resource consumption becomes a critical problem due to the nodes replicate bundle messages to adjacent nodes. In our previous work, we have evaluated the network performance of our Message Suppression (MS) method for Vehicular DTN. In this paper, we consider a threshold-based adaptive method for MS in Vehicular DTN. We use delay and replicated bundle message as evaluation metrics. From the simulation results, we observe that our proposed method decreases the replicated bundle messages.departmental bulletin pape
Attempts of Teaching License Renewal Programs to Experience the Manufacturing by Digital Fabrication
Get PDFapplication/pdf論文(Article)We report trials of teaching license renewal programs to learn manufacturing based on digital fabrication. The digital processing machines used in the renewal course are laser cutter, 3D printer, and cutting plotter. The teaching materials of the renewal programs consist of the operating principle of the machines, a creation of CAD data, and an experience of manufacturing. As a result of the implementation, we were able to enlighten digital fabrication mainly for teachers from technical high schools.departmental bulletin pape
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Archiving the Disaster Image － Using 360 Degree Virtual Reality －
Get PDFapplication/pdf論文(Article)To prevent the disaster, it is important for educating the disaster phenomema. To increase this effect, not only normal pictures but also 360 degrees Virtual Reality (360VR) Images are used for disaster education. We tried to use some kinds of 360 degrees VR cameras like Samsung Gear 360 (2017), Insta 360 Pro and original 6 SONY A6300 cameras with fisheye lenses. To display 360 degrees VR images to HTC Vive, we used Unity 3D. Comparing with these images, currently Insta 360 Pro and original SONY A6300 cameras made mostly same resolution images.othe
Experimental Evaluation of Copper Contamination in a Non-Thermal Food Processing System Utilizing Underwater Shockwaves
Get PDFapplication/pdf論文(Article)In a non-thermal food processing system utilizing underwater shockwaves, there is a possibility that copper electrodes dissolved in water has a bad influence on human bodies. However, as far as the authors know, the water contamination of the non-thermal food processing system has not been investigated in past studies. For this reason, in this paper, we discuss the copper contamination in the non-thermal food processing system. To evaluate the copper contamination, we conducted the experiments using a water examination device for 100 samples. The experiment revealed that the copper concentration in the water of the pressure vessel was 0.33 mg/L at 17.5 degrees Celsius.departmental bulletin pape
Diagonalizing method among test items included in NIST randomness test tool
Get PDFapplication/pdf論文(Article)Randomness tests included in NIST test tool are not independent each other, i.e., the distributions followed by p-value of each test item are not independent. Even if each test item has no problem, the fact makes it difficult to derive the significance level of the test tool as whole items or to introduce a rational criterion for results of the tool. In this paper, we propose a method to solve this problem. The method transforms the distribution followed by each test item’s p-value to the standard normal distribution and assumes that the joint distribution after transformation is a multidimensional normal distribution. Diagonalizing to the joint distribution, the distribution of each test item's p-vale becomes independent each other. In addition, we evaluate this method numerically.departmental bulletin pape
Linked Dataの知識ベース化を指向したオープンプラットフォームの研究
Get PDF福岡工業大学博士（工学）application/pdf学位論文(Thesis)本論文では，知識として活用できないLinked Dataを知識ベース化するResource Propagation Algorithm（RPA），観光語彙基盤，動向分析システムをパッケージ化した新しいオープンプラットフォームについて述べる．RPAは，文字列型のリソースからキーワードを抽出してカテゴリを同定し，IRIリソースに変換した後に，グラフ構造に基づいて潜在的なリンクを推定する新しいアルゴリズムである．RPAは，従来のLabel Propagationとは異なり，述語に基づいてリンク（エッジ）の柔軟な重み変更を実現しており，また，教師データが不要なため様々な種類のLODを対象として知識ベースの生成が可能である．観光語彙基盤は，乱立した観光領域の述語を統一化する述語セットであり，IRI型のリソースを基軸としている．LODの知識ベース化によって二次利用が容易になるだけでなく，推定されたリソースの概念であるキーワードやカテゴリを用いることで高度な活用が可能となることを確認した．例えば，従来の統計データだけは計測できない地域の特色を定量的に分析できる他，ナビゲーションとして利用可能な質問応答システムを実装できることを確認した．本オープンプラットフォームは，Linked Dataを知識ベース化してデータインフラの構築に貢献する非常に有用なものであり，LOD Challenge 2016において優秀賞，並びにLOD for 地域創生賞を受賞し，また，電子情報通信学会I-Scover主催のコンテストにおいても最優秀賞，並びに優秀賞受賞して脚光を浴びている．
本論文の構成は以下の通りである．
第１章では序論として研究背景や関連研究，研究目的，特色と独創的な点を述べる．第2章ではオープンデータについて概説し，第3章でLinked Dataの概説とともに現状課題を議論する．第4章でオープンプラットフォームであるRPA，共通語彙基盤，及び動向分析システムについて述べる．第5章で実験と考察を議論し，第6章では本論文の総括と今後の展望を述べる．doctoral thesi
Application of Fuzzy Logic for Actor Node Selection in Wireless Sensor and Actor Network: Implementation and Performance Evaluation of Proposed Intelligent Simulation Systems and a Testbed
Get PDF福岡工業大学博士（工学）application/pdf学位論文(Thesis)doctoral thesi
Research for Tsunami Measurement Based on 3D Image Measurement Technique
Get PDF福岡工業大学博士（工学）application/pdf学位論文(Thesis)doctoral thesi