KAMEYAMA, Wataru

J-GLOBAL         Last updated: Nov 16, 2018 at 18:01
 
Avatar
Name
KAMEYAMA, Wataru
E-mail
wataruwaseda.jp
URL
http://www.km.comm.waseda.ac.jp/
Affiliation
Waseda University
Section
Faculty of Science and Engineering School of Fundamental Science and Engineering
Job title
Professor
Degree
Dr. of Engineering(Waseda University), Master of Engineering(Waseda University)
Research funding number
90318858

Research Areas

 
 

Academic & Professional Experience

 
1989
 - 
1992
: Assistant Prof at School of Sci. and ENg., Waseda University
 
1992
 - 
1993
: Senior Researcher at GC Technology
 
1993
 - 
1997
: Senior Researcher at Graphics Communication Laboratories
 
1994
 - 
1996
: Transferred to France Telecom CCETT
 
1997
 - 
1998
: Chief Researcher at ASCII Laboratories
 

Education

 
 
 - 
1985
Electronics Communication Engineering, School of Science and Engineering, Waseda University
 
 
 - 
1987
Electronics Engineering, Graduate School of Science and Engineering, Waseda University
 
 
 - 
1990
Electronics Engineering, Graduate School of Science and Engineering, Waseda University
 

Awards & Honors

 
May 2012
International Cooperation Award from the ITU Association of Japan
 
May 2009
The Best Author Award of Niwa-Takayanagi from the Institute of Image Information and Television Engineers
 
Sep 2009
IEICE Communication Society: Distinguished Contributions Award
 
Sep 2007
IEICE Communication Society: Outstanding Contributions Award
 
May 2006
The Best Paper Award of Niwa-Takayanagi from the Institute of Image Information and Television Engineers
 

Published Papers

 
Siran Zhang,Zhiwei Yan,Yong-Jin Park,Hidenori Nakazato,Wataru Kameyama,Kashif Nisar,Ag Asri Ag Ibrahim
IEICE Transactions   100-B(10) 1856-1864   2017   [Refereed]
Xin Qi,Zheng Wen,Toshitaka Tsuda,Wataru Kameyama,Kouichi Shibata,Jiro Katto,Takuro Sato
2016 IEEE Globecom Workshops, Washington, DC, USA, December 4-8, 2016   1-6   2016   [Refereed]
Kenji Kanai,Takeshi Muto,Array,Shinya Yamamura,Tomoyuki Furutono,Takafumi Saito,Hirohide Mikami,Kaoru Kusachi,Toshitaka Tsuda,Wataru Kameyama,Array,Takuro Sato
IEEE Journal on Selected Areas in Communications   34(8) 2102-2114   2016   [Refereed]
Kenji Kanai,Takeshi Muto,Array,Shinya Yamamura,Tomoyuki Furutono,Wataru Kameyama,Array,Takuro Sato,Takafumi Saito,Hirohide Mikami,Kaoru Kusachi,Toshitaka Tsuda
2015 IEEE Globecom Workshops, San Diego, CA, USA, December 6-10, 2015   1-6   2015   [Refereed]
基礎律動を用いた音楽の分類に関する基礎的検討
三木 亮祐, 亀山 渉, 菅沼 睦
電子情報通信学会, HIP研究会, 信学技報   114(68 HIP2014-28) 211-216   May 2014
視線情報による画像識別に向けた瞳孔径特徴量の提案
西口 侑希, 菅沼 睦, 亀山 渉
電子情報通信学会, 2014年総合大会   D-12-15    Mar 2014
画像検索システムにおける日本語WordNetを利用した単語間類似度計算手法の比較
陳 豊, 亀山 渉
電子情報通信学会, 2014年総合大会   D-4-10    Mar 2014
B-6-96 Proactive Content Caching and Delivery Scheme using Hybrid Protocols of CCN and IP utilizing Transportation Systems
KAMEYAMA Wataru;TSUDA Toshitaka;Katto Jiro
Proceedings of the IEICE General Conference   2014(2)    Mar 2014
Performance Analysis and Experimental Validation of Proactive Delivery Scheduling in the Content Delivery System utilizing Transportation Systems
KANAI Kenji;MUTO Takeshi;KATTO Jiro;TSUDA Toshitaka;KAMEYAMA Wataru
IEICE technical report   113(472) 479-484   Feb 2014
We have introduced a proactive content delivery system utilizing transportation systems for next generation mobile networks. In this paper, we propose a proactive delivery scheduling, which is called "Smart Scheduler." This scheduler calculates co...
B-6-89 Simulation Evaluation of the Content Delivery System utilizing Transportation Systems
Kisara Hiroto;Katto Jiro;Tsuda Toshitaka;Kameyama Wataru
Proceedings of the IEICE General Conference   2014(2)    Mar 2014
B-6-88 Proactive Content Caching and Delivery Scheme utilizing Transportation Systems
Sato Takuro;Park Yong Jin;Tsuda Toshitaka;Goto Shigeki;Tanaka Yoshiaki;Kameyama Wataru;Shimamoto Shigeru;Katto Jiro;Ichino Masatsugu
Proceedings of the IEICE General Conference   2014(2)    Mar 2014
B-6-86 Mobility Support in ICN Testbed
Muto Takeshi;Katto Jiro;Tsuda Toshitaka;Kameyama Wataru
Proceedings of the IEICE General Conference   2014(2)    Mar 2014
先回り配信スケジューリングの特性評価と複数チャネル拡張
金井 謙治, 甲藤 二郎, 津田 俊隆, 亀山 渉
電子情報通信学会, 2014年総合大会   B-6-39    Mar 2014
Kenji Kanai,Takeshi Muto,Hiroto Kisara,Array,Toshitaka Tsuda,Wataru Kameyama,Array,Takuro Sato
IEEE Global Communications Conference, GLOBECOM 2014, Austin, TX, USA, December 8-12, 2014   1382-1387   2014   [Refereed]
Zhana Bao,Wataru Kameyama
Proceedings of the 7th Workshop on Ph.D Students, PIKM@CIKM 2014, Shanghai, China, November 3, 2014   57-62   2014   [Refereed]
Zhana Bao,Wataru Kameyama
Trends and Applications in Knowledge Discovery and Data Mining - PAKDD 2013 International Workshops: DMApps, DANTH, QIMIE, BDM, CDA, CloudSD, Gold Coast, QLD, Australia, April 14-17, 2013, Revised Selected Papers   307-318   2013   [Refereed]
AKIMOTO Ryoji, KAMEYAMA Wataru
情報知識学会誌   22(1) 9-22   Mar 2012
Supheakmungkol Sarin,Michael Fahrmair,Matthias Wagner 0001,Wataru Kameyama
JIP   20(1) 250-266   2012   [Refereed]
AKIMOTO Ryoji, KAMEYAMA Wataru
Journal of Japan Society of Information and Knowledge   22(1) 9-22   2012
This paper proposes a new description language, called FS (Fuzzy Schema). FS language supports a collection framework to coordinate schemas authored independently. The framework brings a benefit into museum metadata description: information intero...
Supheakmungkol Sarin,Michael Fahrmair,Matthias Wagner 0001,Wataru Kameyama
5th FTRA International Conference on Multimedia and Ubiquitous Engineering, MUE 2011, Crete, Greece, 28-30 June, 2011   59-66   2011   [Refereed]
Kok-Meng Ong,Supheakmungkol Sarin,Wataru Kameyama
TRECVID 2010 workshop participants notebook papers, Gaithersburg, MD, USA, November 2010      2010   [Refereed]
Mohd. Firdaus Md. Khalid,Wataru Kameyama
IJAMC   4(3) 203-218   2010   [Refereed]
KAMEYAMA Wataru
The Journal of the Institute of Image Information and Television Engineers   63(12) 1790-1794   Dec 2009
2009 SECOND INTERNATIONAL CONFERENCE ON THE APPLICATIONS OF DIGITAL INFORMATION AND WEB TECHNOLOGIES (ICADIWT 2009)   204-209   2009   [Refereed]
Supheakmungkol Sarin,Wataru Kameyama
Proceedings of the 17th International Conference on Multimedia 2009, Vancouver, British Columbia, Canada, October 19-24, 2009   1137-1138   2009   [Refereed]
Yuan-Kang Wang,Akiko Seki,Wataru Kameyama
The First International Conference on Internet Multimedia Computing and Service, ICIMCS '09, Kunming, Yunnan, YT, China, November 23-25, 2009   238-243   2009   [Refereed]
Supheakmungkol Sarin,Wataru Kameyama
Working Notes for CLEF 2009 Workshop co-located with the 13th European Conference on Digital Libraries (ECDL 2009) , Corfù, Greece, September 30 - October 2, 2009.      2009   [Refereed]
Pao Sriprasertsuk,Wataru Kameyama
IEICE Transactions   92-D(4) 608-619   Apr 2009   [Refereed]
Supheakmungkol Sarin,Wataru Kameyama
Working Notes for CLEF 2008 Workshop co-located with the 12th European Conference on Digital Libraries (ECDL 2008) , Aarhus, Denmark, September 17-19, 2008.      2008   [Refereed]
Supheakmungkol Sarin,Toshinori Nagahashi,Tadashi Miyosawa,Wataru Kameyama
Adv. in MM   2008 592690:1-592690:16   2008   [Refereed]
亀山 渉
情報処理   48(10) 1111-1112   Oct 2007
Chenda Nou,Wataru Kameyama
Proceedings of the First IEEE International Conference on Semantic Computing (ICSC 2007), September 17-19, 2007, Irvine, California, USA   482-492   Sep 2007   [Refereed]
Tran Quoc Dung,Wataru Kameyama
2007 IEEE International Conference on Research, Innovation and Vision for the Future in Computing & Communication Technologies, RIVF 2007, Hanoi, Vietnam, 5-9 March 2007   1-7   2007   [Refereed]
Chenda Nou,Wataru Kameyama
Proceedings of the IEEE International Conference on Information Reuse and Integration, IRI 2007, 13-15 August 2007, Las Vegas, Nevada, USA   215-220   Aug 2007   [Refereed]
Chenda Nou,Wataru Kameyama
Proceedings of the 2007 International Conference on Artificial Intelligence, ICAI 2007, Volume II, June 25-28, 2007, Las Vegas, Nevada, USA   581-587   2007   [Refereed]
Tran Quoc Dung,Wataru Kameyama
Data Warehousing and Knowledge Discovery, 9th International Conference, DaWaK 2007, Regensburg, Germany, September 3-7, 2007, Proceedings   4654(#325) 323-333   Sep 2007   [Refereed]
Wataru Kameyama
IEICE Transactions   89-B(10) 2669   Oct 2006   [Refereed]
Wataru Kameyama
RFC   4195 1-6   2005   [Refereed]
Nigel Earnshaw,Shigeru Aoki,Alex Ashley,Wataru Kameyama
RFC   4078 1-10   2005   [Refereed]
Akiko Seki,Wataru Kameyama
Proceedings of the Global Telecommunications Conference, 2003. GLOBECOM '03, San Francisco, CA, USA, 1-5 December 2003   4111-4115   2003   [Refereed]
Naoto Shimizu,Toshinori Miyazawa,Wataru Kameyama,Hiroshi Watanabe,Hideyoshi Tominaga
Proceedings of the Global Telecommunications Conference, 2002. GLOBECOM '02, Taipei, Taiwan, 17-21 November, 2002   1638-1642   2002   [Refereed]
Loys Belleguiea,Wataru Kameyama
Proceedings of the 2001 IEEE International Conference on Multimedia and Expo, ICME 2001, August 22-25, 2001, Tokyo, Japan      2001   [Refereed]
Hiroyuki Kasai,Maki Sugiura,Tsuyoshi Hanamura,Wataru Kameyama,Hideyoshi Tominaga
Visual Communications and Image Processing 2000, Perth, Australia, June 20, 2000   473-484   2000   [Refereed]
Hiroyuki Kasai,Tsuyoshi Hanamura,Wataru Kameyama,Hideyoshi Tominaga
Proceedings of the 2000 International Conference on Image Processing, ICIP 2000, Vancouver, BC, Canada, September 10-13, 2000   964-967   2000   [Refereed]
Masahiro Iwahashi,Koichi Ohyama,Wataru Kameyama,Noriyoshi Kambayashi
1994 IEEE International Symposium on Circuits and Systems, ISCAS 1994, London, England, UK, May 30 - June 2, 1994   277-280   1994   [Refereed]
Tsuyoshi Hanamura,Wataru Kameyama,Hideyoshi Tominaga
Sig. Proc.: Image Comm.   5(1-2) 159-184   1993   [Refereed]
Wataru Kameyama,Hideyuki Oka,Hideyoshi Tominaga
Systems and Computers in Japan   19(9) 77-91   1988   [Refereed]
基礎律動に基づくユーザの驚き・戸惑いの推定に関する基礎的検討
菅沼 睦, 石黒 真人, 亀山 渉
電子情報通信学会, 2014年総合大会   A-15-22 
Displaying Navigation Information Utilizing the Gazing-Point to Reduce Mental and Visual Workload for Drivers
Mohammad Abdullah A Almogbel, Wataru Kameyama, Mutsumi Suganuma
電子情報通信学会, 2014年総合大会   A-15-13 
コミック読書時の瞬目と瞳孔径変動の関係性
松井 健, 亀山 渉, 菅沼 睦
電子情報通信学会, 2014年総合大会   A-15-12    Mar 2014
瞳孔径の対光反射瞳孔応答モデルと個人内変動に関する検討
李 博, 菅沼 睦, 亀山 渉
電子情報通信学会, 2014年総合大会   A-15-11    Mar 2014
Image Retrieval System based on Word-Similarity using Japanese WordNet
Feng Chen;Wataru Kameyama
IPSJ SIG Notes   2014(7) 1-5   Feb 2014
We have proposed a regional information-platform which delivers audiovisual contents automatically that are retrieved with some popular keywords automatically extracted from Web pages and/or SNS related to the region. In this paper, the content re...
Development and Evaluation of Regional Information Platform and Information Distribution System : For Tourism Promotion and Disaster Prevention
MIYOSAWA Tadashi;HIROSE Hiroo;TSUCHIYA Takeshi;KAMEYAMA Wataru;KOYANAGI Keiichi;YAMAMOTO Hisashi;KARASAWA Hideyasu;KARASAWA Hidenaga;MASUZAWA Kenichi
IEICE technical report. Communication systems   113(339) 135-140   Nov 2013
As the main focus of this research, we constructed an experimental website for the communication broadcasting cooperative transmission system and developed a regional information platform. In addition, we carried out a small-scale demonstration ex...
Khmer Word Segmentation and Out-of-Vocabulary Words Detection Using Collocation Measurement of Repeated Characters Subsequences
Channa Van, Wataru Kameyama
早稲田大学大学院国際情報通信研究科/早稲田大学国際情報 通信研究センタ-, GITS/GITI紀要2012-2013   2012-2013 21-31   Oct 2013
Discovering Similarity of User Viewing Behavior using Gazing-Path
Pakornchat Pojanapreecha, Pao Sriprasertsuk, Mutsumi Suganuma, Wataru Kameyama
2013 International Workshop on Smart Info-Media Systems in Asia (SISA2013)   SS-AVM-4    Sep 2013
Preliminary Analysis on Correlation of Comic Reading Time and Comic Components
Ken Matsui, Mutsumi Suganuma, Pao Sriprasertsuk, Wataru Kameyama
2013 International Workshop on Smart Info-Media Systems in Asia (SISA2013)   SS-AVM-3    Sep 2013
Fish Detection by LBP Cascade Classifier with Optimized Processing Pipeline
Dang Hoang Anh, Sriprasertsuk Pao, Kameyama Wataru
情報処理学会, オーディオビジュアル複合情報処理研究会   2013-AVM-82(9)    Sep 2013
脳波による味の好き嫌い判別に関する基礎的検討
台 彬, パオ スィープラサスック, 菅沼 睦, 亀山 渉
情報科学技術フォーラム FIT 2013   J-024    Sep 2013
コミック読書時におけるページ滞留時間と瞬目を利用した興味度推定に関する基礎的検討
松井 健, 菅沼 睦, パオ スィープラサスック, 亀山 渉
情報科学技術フォーラム FIT 2013   J-023    Sep 2013
Comparison of In-Vehicle Navigation Guidance by Fixed-Spot, Voice and Gazing-Point
Mohammad Abdullah A Almogbel, Pao Sriprasertsuk, 菅沼 睦, 亀山 渉
情報科学技術フォーラム FIT 2013   J-006    Sep 2013
HBaseマッピングによる日本語WordNetを利用した番組等検索システムに関する研究
陳 豊, Sriprasertsuk Pao, 亀山 渉
情報科学技術フォーラム FIT 2013   D-026    Sep 2013
A Novel Proposal for Outlier Detection in High Dimensional Space
Zhana Bao, Wataru Kameyama
The 17th Pacific-Asia Conference on Knowledge Discovery and Data Mining, The 3rd Quality Issues, Measures of Interestingness and Evaluation of Data Mining Models Workshop (QIMIE'13)   No.3    Apr 2013
WordNetを利用した番組等検索システムに関する研究
陳 豊, Pao Sriprasertsuk, 亀山 渉
電子情報通信学会 2013年総合大会   D-5-5    Mar 2013
A Character-Clusters N-Grams Indexing Approach for Khmer Information Retrieval System
Channa Van, Wataru Kameyama
電子情報通信学会 2013年総合大会   D-5-4    Mar 2013
A-15-14 A Relationship Analysis between User's Pupil Size and Background Activity against Audiovisual Sequences
Kawamura Eri;Suganuma Mutsumi;Kameyama Wataru
Proceedings of the IEICE General Conference   2013    Mar 2013
Evaluation on Comic Reader's Interest using Pupil Size
Sokhour Ny, Mutsumi Suganuma, Pao Sriprasertsuk, Wataru Kameyama
電子情報通信学会 2013年総合大会   A-15-12    Mar 2013
A-15-10 A Consideration for Optimized Parameters of Pupil Reaction Model
Ri Haku;Suganuma Mutsumi;Kameyama Wataru
Proceedings of the IEICE General Conference   2013    Mar 2013
映像視聴時における視聴者の瞳孔と基礎律動情報の関係分析に関する一検討
川村 愛莉, 菅沼 睦, 亀山 渉
電子情報通信学会 HCGシンポジウム 2012   I-1-4    Dec 2012
A Consideration on Comic Reader's Behavior using Gaze Path and Pupil Size
Sokhour Ny, Mutsumi Suganuma, Pao Sriprasertsuk, Wataru Kameyama
情報処理学会, オーディオビジュアル複合情報処理研究会   2012-AVM-79(No.26)    Dec 2012
Efficient Scale Database Construction for Scale Filtering in SURF-based AR Application
Hoang Anh Dang, Pao Sriprasertsuk, 亀山 渉
情報科学技術フォーラム FIT 2011   K-007    Sep 2012
J-009 A Consideration on Analysis of User Response against Audiovisual Sequence using Pupil Size and Background Activity
Kawamura Eri;Suganuma Mutsumi;Kameyama Wataru
情報科学技術フォーラム FIT 2011   11(3) 425-426   Sep 2012
Personalized TV-program Recommendation using User's Viewing Histories and Time-Frames
Quoc Hung Dinh, Pao Sriprasertsuk, 亀山 渉, 福田 健二
情報科学技術フォーラム FIT 2011   I-036    Sep 2012
Ultilizing Users' Watching Sequences and TV-programs' Metadata for Personalized TV-program Recommendation
Dinh Quoc Hung, Pao Sriprasertsuk, Wataru Kameyama, Kenji Fukuda
情報処理学会, オーディオビジュアル複合情報処理研究会   2012-AVM-77(11)    Jul 2012
A Study on Applying Outlier Detection for Network Intrusion Detection
Zhana Bao, Wataru Kameyama
電子情報通信学会 2012年総合大会   BS-3-11    Mar 2012
Automatic Discovering of Word Relationships in Khmer
Channa Van, Wataru Kameyama
電子情報通信学会 2012年総合大会   D-5-13    Mar 2012

Misc

 
田上結衣, 菅沼睦, 亀山渉, CLIPPINGDALE Simon
情報科学技術フォーラム講演論文集   17th 261‐262   Sep 2018
CLIPPINGDALE Simon, 望月貴裕, 佐野雅規, 菅沼睦, 亀山渉
情報科学技術フォーラム講演論文集   17th 251‐252   Sep 2018
加藤敦士, 菅沼睦, 亀山渉
情報科学技術フォーラム講演論文集   17th 295‐296   Sep 2018
Mohammad A. Almogbel, Anh H. Dang, Wataru Kameyama
International Conference on Advanced Communication Technology, ICACT   2018-February 256-259   Mar 2018
© 2018 Global IT Research Institute (GiRI). Vehicle driver's ability to maintain optimal performance and attention is essential to ensure the safety of the traffic. Electroencephalography (EEG) signals have been proven to be effective in evaluatin...
渡邊滉大, 亀山渉, 澁谷直大
電子情報通信学会大会講演論文集(CD-ROM)   2018 ROMBUNNO.D‐12‐69   Mar 2018

Books etc

 
亀山 渉, 他
インプレスR&D   Mar 2010   ISBN:9784844328537
画像電子情報ハンドブック
亀山, 他
画像電子学会編, 東京電機大学出版局   Feb 2008   
亀山 渉, 金子 格, 渡辺 裕 (Part:Joint Work)
インプレスR&D   Mar 2007   ISBN:4844323911
2007朝日ジュニア百科年鑑
亀山, 他
朝日新聞社   Mar 2007   
亀山, 他 (Part:Joint Work)
インプレスR&D   Dec 2006   ISBN:4844323423
先端メディアと人間の科学
亀山, 他
早稲田大学eヒューマン研究所   Mar 2006   
改定版 ディジタル放送教科書 下
亀山, 他
インプレス   Mar 2005   
改定版 ディジタル放送教科書 上
亀山, 他
インプレス   Oct 2004   
新ブロードバンド教科書 上
亀山, 他
IDGジャパン   Oct 2003   
情報圧縮技術
亀山渉, 金子格, 渡辺裕
IDGジャパン   Apr 2003   
ブロードバンド+モバイルMPEG教科書
亀山, 他
アスキー   Feb 2003   
ディジタル放送教科書 上・下
亀山, 他
IDGジャパン   Feb 2003   
コンパクト版 インターネット辞典
亀山, 他
IEインスティテュート   Dec 2000   
インターネット教科書
亀山, 他
I&E神蔵研究所   Jun 2000   
インターネットRFC事典
亀山, 他
アスキー   Nov 1998   
コンピュータ/通信/放送標準事典
亀山, 他
アスキー   May 1998   
ディジタル放送・インターネットのための情報圧縮技術
亀山, 他
bit別冊/共立出版   Feb 1998   
ポイント図解式通信プロトコル事典
亀山, 他
アスキー   Nov 1996   
実践MPEG教科書
亀山, 他
アスキー   Nov 1995   
メディア統合
亀山, 他
リアライズ社   Dec 1994   
最新MPEG教科書
亀山, 他
アスキー   Aug 1994   

Conference Activities & Talks

 
Maeda Yasuaki, Yan Zhiwei, Park Yong-Jin, Kameyama Wataru, Nisar Kashif, Ibrahim Ag Asri Ag, Hijiazi Mohd Hanafi Ahmad, Kim Heedon
Proceedings of the IEICE General Conference   1 Mar 2016   
Kisara Hiroto, Kurokawa Sayo, Kanai Kenji, Katto Jiro, Tsuda Toshitaka, Kameyama Wataru
Proceedings of the IEICE General Conference   24 Feb 2015   
西口 侑希, 菅沼 睦, 亀山 渉
IPSJ SIG Notes   20 Feb 2015   
Digital image consumption has grown so rapidly, and image retrieval is expected to be more improved. To bridge the semantic gap which is an underlying problem of image retrieval, relevance feedback can be one of the solutions. Relevance feedback w...
HARADA Sho, YAN Zhiwei, PARK Yong-Jin, KAMEYAMA Wataru
IEICE technical report   16 Oct 2014   
Named Data Networking (NDN) is a clean slate future Internet architecture optimized for today's demand, which is to retrieve contents efficiently. The Internet is mainly used to retrieve contents in terms of traffics. In NDN, communications can be...
Sato Takuro, Park Yong Jin, Tsuda Toshitaka, Goto Shigeki, Tanaka Yoshiaki, Kameyama Wataru, Shimamoto Shigeru, Katto Jiro, Ichino Masatsugu
IEICE technical report   16 Oct 2014   
In the future, network traffic will be increasing according to demand of big traffic of moving picture on the mobile communication environment. For processing large traffic, virtualized network based on SDN (Software defined Network) has been prov...

Research Grants & Projects

 
Content Recommendation System
Collaborative Contents-Creation Environment using High-Resolution Image Transmission
Multimedia Contents Description Interfaces
Advanced Information System Based on XML Representation
Automatic Rights Inheritance with Rights Permanency and Consistency in Content Circulation