Publication

@inproceedings{梅沢啓佑2018lpwan,

title = {LPWANを用いた森林環境における位置推定},

author = {梅沢啓佑 and 瀬崎薫 and 小林博樹},

url = {https://www.ieice.org/ken/paper/20180302l1Dg/},

issn = {2432-6380},

year  = {2018},

date = {2018-02-22},

booktitle = {ライフインテリジェンスとオフィス情報システム研究会 (LOIS) },

volume = {117},

number = {464},

pages = {135--140},

publisher = {電子情報通信学会},

abstract = {自然環境や動物の生態系を知ることは, 人間と自然, 動物が共存していく上で必要不可欠である. 人間がそのようなデータを定期的に集めるのは非効率であるため, 動物が代わりにセンシングを行う機構が存在する. しかしながら問題点として, センシングされたデータに位置情報が付与されていないこと, また, データのシェアリングが適切でない点が問題点として上げられる. そこで, 本稿ではこれらの課題を解決するため, ワンホップ転送位置情報付与システムの提案を行う. 具体的には, LPWANの1種であるLoRaを用いてこれらの課題を解決する. 提案手法の実現可能性を確かめるため, 森林環境において実際に実験を行った. その結果から, 森林環境における位置推定の精度を確かめる事ができた. 

Understanding forest environment or an ecological system of animals is a key factor for human to coexist with nature and animals respectively. Since periodically sensing these data for human is not efficient, there is a system that in stead of human sensing such data, animals do that. However, there is a problem that such sensed data by animals doesn’t have geological information, and is not shared with other animals properly. Hence, we propose “One-hop forwarding system with geological information”. Concretely, using LoRa, one of LPWAN, we try to solve such a problem. To confirm validation of our proposal, we conducted an experiment in forest. As a result, we verify how our system functions in such an environment.},

keywords = {Animal Sensing, IoT, LoRa, LPWAN, Sensor Network},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{Ito2017-ey,

title = {Data analysis on train transportation data with nonnegative  matrix factorization},

author = {Kyoichi Ito and Masaki Ito and Kosuke Miyazaki and Keishi Tanimoto and Kaoru Sezaki},

doi = {10.1109/BigData.2017.8258425},

year  = {2018},

date = {2018-01-15},

booktitle = {2017 IEEE International Conference on Big Data (Big Data), 11-14 Dec. 2017, Boston, MA, USA},

pages = {4080--4085},

publisher = {ieeexplore.ieee.org},

abstract = {In light of the recognized need to collect and analyze data to maintain urban development, the “smart city” concept has gained much attention recently. The development of sensing and information techniques has facilitated the analysis of urban mobility to better understand the characteristics of cities. Of the information and data that can be used to characterize cities, transportation data are among the most useful because transportation is so closely related to human and other aspects of urban mobility. In extracting features from automatically collected data, the greatest difficulty comes from the size or complexity of the data set, as these often have too many attributes or indices to analyze. This paper discusses the results of analyses of smart card ticketing authentication logs using nonnegative matrix factorization (NMF). The results present extracted features applicable to assessing various user and station characteristics and dynamics.},

keywords = {data analysis, NMF, Smart cards, Transportation},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{中村和彦2018電源,

title = {電源・情報インフラのない森林での定点撮影・録音による体験の補完と拡張},

author = {中村和彦 and 大塚啓太 and 藤原章雄 and 小林博樹 and 斎藤馨 and 瀬崎薫},

year  = {2018},

date = {2018-01-01},

booktitle = {日本森林学会大会発表データベース 第 129 回日本森林学会大会},

pages = {60},

organization = {日本森林学会},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{戸辺義人2018msox,

title = {MSOX: 社会システム利用に向けた人行動の情報流通},

author = {戸辺義人 and 中山悠 and 梅田和昇 and 伊藤昌毅 and 瀬崎薫},

year  = {2018},

date = {2018-01-01},

booktitle = {横幹連合コンファレンス予稿集 第 9 回横幹連合コンファレンス},

pages = {F--3},

organization = {横断型基幹科学技術研究団体連合 (横幹連合)},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{戸辺義人2018街中人流のAPI化に向けて,

title = {街中人流のAPI化に向けて},

author = {戸辺義人 and 伊藤昌毅 and 瀬崎薫},

year  = {2018},

date = {2018-01-01},

journal = {電子情報通信学会 第18回ヒューマンプローブ研究会},

publisher = {東京電機大学},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{石田幸輝2018大気環境に基づいたランニング経路の評価,

title = {大気環境に基づいたランニング経路の評価},

author = {石田幸輝 and Chenwei Song and Ruichao Zhang and 伊藤昌毅 and 瀬崎薫},

year  = {2018},

date = {2018-01-01},

journal = {2018年ソサイエティ大会},

publisher = {電子情報通信学会},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{中村裕一2018クラウドセンシングにおける内挿の信頼度を用いたノード選択,

title = {クラウドセンシングにおける内挿の信頼度を用いたノード選択},

author = {中村裕一 and 伊藤昌毅 and 瀬崎薫},

year  = {2018},

date = {2018-01-01},

journal = {2018年ソサイエティ大会},

publisher = {電子情報通信学会},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{谷本圭志2018公共交通ビッグデータを用いた潜在的な優良顧客の発見手法,

title = {公共交通ビッグデータを用いた潜在的な優良顧客の発見手法},

author = {谷本圭志 and 廣畑健也 and 伊藤昌毅 and 宮崎耕輔},

year  = {2018},

date = {2018-01-01},

journal = {第57回土木計画学研究発表会・講演集},

publisher = {東京工業大学},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{太田恒平2018バスロケデータを基にした路線バスの遅延対策ダイヤ改正,

title = {バスロケデータを基にした路線バスの遅延対策ダイヤ改正〜両備グループにおけるオープンイノベーションの実践〜},

author = {太田恒平 and 伊藤昌毅 and 森慶太 and 平本清志 and 前川雄祐},

year  = {2018},

date = {2018-01-01},

journal = {第57回土木計画学研究発表会・講演集},

publisher = {東京工業大学},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{加藤弘則2018交通系ICカードログによる駅ごとの乗降者数格差の検証,

title = {交通系ICカードログによる駅ごとの乗降者数格差の検証},

author = {加藤弘則 and 伊藤昌毅 and 瀬崎薫},

year  = {2018},

date = {2018-01-01},

journal = {第57回土木計画学研究発表会・講演集},

publisher = {東京工業大学},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{伊藤昌毅2018交通系ICカードと乗換検索サービスのビッグデータ比較による,

title = {交通系ICカードと乗換検索サービスのビッグデータ比較による高精度な公共交通利用実態把握可能性の検討},

author = {伊藤昌毅 and 伊藤匡一 and 宮崎耕輔 and 谷本圭志 and 瀬崎薫},

year  = {2018},

date = {2018-01-01},

journal = {第57回土木計画学研究発表会・講演集},

publisher = {東京工業大学},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{Sun_undated-yrj,

title = {A Novel Molecular Communication through Diffusive DNA Molecules},

author = {Yao Sun and Masaki Ito and Kaoru Sezaki},

url = {https://www.ieice.org/ken/paper/2017113091aU/},

issn = {2432-6380},

year  = {2017},

date = {2017-11-30},

booktitle = {電子情報通信学会 ASN研究会},

journal = {IEICE Conferences Archives},

publisher = {The Institute of Electronics, Information and Communication  Engineers},

abstract = {Diffusion-based molecular communication (DBMC) is a recently proposed technique for information transmission among Nano-machines which can be used as in-body sensors to monitor the health condition. Conventional DBMC faces the low channel capacity problem. To this problem, we present one of our in-progress work in which DNA molecules are used as the information carrier. Particularly, we design two encoding schemes and establish the channel and noise model. We also derive the channel capacity of the proposed system. Comparing with the former schemes, the proposed one significantly increases the channel capacity of DBMC thanks to the high-density information that can be stored in DNA molecules. },

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{sun2017a,

title = {A Novel Molecular Communication through Diffusive DNA Molecules},

author = {Yao Sun and Masaki Ito and Kaoru Sezaki},

year  = {2017},

date = {2017-11-01},

booktitle = {IEICE Ambient intelligence and Sensor Networks (ASN)},

publisher = {IEICE},

address = {Yogyakarta, Indonesia},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{北里知也2017クラウドセンシングによる,

title = {クラウドセンシングによる Bluetooth を用いた人流把握の検討},

author = {北里知也 and 伊藤昌毅 and 瀬崎薫},

url = {https://www.ieice.org/ken/paper/20170721xbVm/},

year  = {2017},

date = {2017-07-12},

booktitle = {知的環境とセンサネットワーク（ASN）研究会},

journal = {電子情報通信学会技術研究報告= IEICE technical report: 信学技報},

volume = {117},

number = {134},

pages = {193--198},

publisher = {電子情報通信学会},

abstract = {人々の移動軌跡を記録したデータを分析することで，美術館や博物館における来場者の行動パターンを分析したり，都市機能の分析をしたりすることができる．

しかし，人流を低コストでセンシングできる実用的な手法はない．

そこで，今回Bluetoothを用いた低コストな人流把握手法を提案する．

提案手法では，人流の大きさと方向のそれぞれを別々に取得する．

さらに，提案手法の実現可能性を確かめる2つの実験を行った．

1つ目の実験では，人流の大きさをセンシングする手法の実現可能性を確かめられた．

2つ目の実験では，人流の移動方向をセンシングする手法の実現可能性を確かめられた． 

By analyzing human mobility data, we can know the activity patterns of a museum visitor, functional compositions of urban spaces, and so on.

However, there is no low-cost way to sensing human mobility easily.

Therefore, we propose the low-cost sensing system for recognizing human mobility using Bluetooth.

Our system obtains a size and a direction of human mobility separately.

Moreover, we show the feasibility of our proposal by two experiments.

The first one demonstrates the feasibility of detecting a size of human mobility.

The second one shows the feasibility of obtaining a direction of human mobility.},

keywords = {Bluetooth, Congestion sensing, crowd sensing, Human mobility flow},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{伊藤昌毅2017日本における公共交通オープンデータの現状と展望,

title = {日本における公共交通オープンデータの現状と展望},

author = {伊藤昌毅 and 瀬崎薫},

url = {http://www.niya.net/thesis/opendata_jsce55.pdf},

year  = {2017},

date = {2017-06-01},

booktitle = {第55回土木計画学研究発表会},

address = {愛媛大学},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{鈴木孝男2017大気汚染センシングの実測データを用いた,

title = {大気汚染センシングの実測データを用いたNegative Surveysの復元精度推定手法の評価},

author = {鈴木孝男 and 伊藤昌毅 and 瀬崎薫},

url = {https://www.ieice.org/ken/paper/20170302qbRj/},

year  = {2017},

date = {2017-02-23},

booktitle = {ライフインテリジェンスとオフィス情報システム（LOIS）研究会},

journal = {電子情報通信学会技術研究報告= IEICE technical report: 信学技報},

volume = {116},

number = {488},

pages = {85--90},

publisher = {電子情報通信学会},

abstract = {環境センサを搭載したモバイルデバイスを持つ一般ユーザが環境センシングに参加するモバイル環境センシングにおいて，プライバシ情報の流出が問題となる．Perturbation技術を用いたプライバシ保護手法では，ユーザが手元のデバイスで偽装処理を施したセンサデータを送信することで個々のデータを秘匿化しつつ，サーバは特定の処理を施すことで偽装処理前の真のセンサデータの統計情報を復元できる．サーバはどの程度復元できているかを把握するために復元精度を推定する必要があり，筆者らは環境情報が時空間的相関に起因して特定のモデルに従うことを利用した復元精度推定手法を提案してきた．本稿では環境情報として大気汚染を取り上げ，筆者らが開発した大気汚染センシングデバイスを用いて行った大規模なモバイル大気汚染センシングについて報告し，得られた実測データを用いて，Perturbation技術の1つであるNegative Surveysの復元精度推定手法を評価する． 

In mobile environmental sensing, where mobile users sense environmental variables and send data to a server via mobile devices, there is a risk of privacy leakage from sensor readings. Data perturbation, a privacy preserving method, disguises sensor readings on the user side while allowing a server to reconstruct statistical information, such as data distribution, of original data. Data perturbation has a serious problem in that a server cannot calculate the reconstruction accuracy. We previously proposed a method to estimate the reconstruction accuracy using a spatiotemporal model of environmental variables. In this study, we collect air pollution data with our mobile air pollution sensing device. Using the field survey data, we evaluate our methods to estimate the reconstruction accuracy of Negative Surveys, a data perturbation technique.},

keywords = {Data Perturbation, Mobile Environmental Sensing, Negative Surveys, Privacy, Reconstruction Accuracy},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{nakayama2017absorb,

title = {ABSORB: Autonomous base station with optical reflex backhaul to adapt to fluctuating demand},

author = {Yu Nakayama and Takuya Tsutsumi and Kazuki Maruta and Kaoru Sezaki},

year  = {2017},

date = {2017-01-01},

booktitle = {IEEE INFOCOM 2017-IEEE Conference on Computer Communications},

pages = {1--9},

organization = {IEEE},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{nakayama2017optically,

title = {Optically backhauled moving network for local trains},

author = {Yu Nakayama and Kazuki Maruta and Takuya Tsutsumi and Kaoru Sezaki},

year  = {2017},

date = {2017-01-01},

booktitle = {Proceedings of the 4th ACM Workshop on Hot Topics in Wireless},

pages = {31--35},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{nakayamafundamental,

title = {Fundamental Analysis of Nonlinear Bypass Route Computation for Wired and Wireless Network Cooperation Recovery System},

author = {Yu Nakayama and Kazuki Maruta and Takuya Tsutsumi and Kaoru Sezaki},

year  = {2017},

date = {2017-01-01},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{sun2017efficient,

title = {An efficient distance measurement approach in diffusion-based molecular communication based on arrival time difference},

author = {Yao Sun and Masaki Ito and Kaoru Sezaki},

year  = {2017},

date = {2017-01-01},

booktitle = {Proceedings of the 4th ACM International Conference on Nanoscale Computing and Communication},

pages = {1--6},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{aoki2017early,

title = {An early event detection technique with bus gps data},

author = {Shunsuke Aoki and Kaoru Sezaki and Nicholas Jing Yuan and Xing Xie},

year  = {2017},

date = {2017-01-01},

booktitle = {Proceedings of the 25th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems},

pages = {1--4},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{伊藤匡一2017非負値行列因子分解を用いた電車乗降データの解析,

title = {非負値行列因子分解を用いた電車乗降データの解析},

author = {伊藤匡一 and 伊藤昌毅 and 瀬崎薫},

year  = {2017},

date = {2017-01-01},

journal = {電子情報通信学会ソサイエティ大会},

publisher = {電子情報通信学会},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{Ruktantichoke_undated-obe,

title = {Real-time Mobile Computer Vision with Edge Computing},

author = {Ben Ruktantichoke and Masaki Ito and Kaoru Sezaki},

url = {https://www.gakkai-web.net/gakkai/ieice/S_2017/Settings/html/key/alpha-c.html},

year  = {2017},

date = {2017-01-01},

booktitle = {IEICE Conferences Archives},

publisher = {The Institute of Electronics, Information and Communication Engineers},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{北里知也2016スマートフォンを用いたリアルタイム屋内混雑度可視化システム,

title = {スマートフォンを用いたリアルタイム屋内混雑度可視化システム},

author = {北里知也 and 伊藤匡一 and 梅沢啓佑 and 伊藤昌毅 and 瀬崎薫},

year  = {2016},

date = {2016-09-01},

journal = {電子情報通信学会ソサイエティ大会},

publisher = {一般社団法人電子情報通信学会},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{,

title = {Negative Surveysにおける環境情報のモデルを利用した復元精度推定手法と復元処理の不偏性に基づく復元精度推定手法の性能比較},

author = {鈴木孝男 and 伊藤昌毅 and 瀬崎薫 },

year  = {2016},

date = {2016-09-01},

booktitle = {電子情報通信学会ソサイエティ大会, モバイルネットワークとアプリケーション, B-15-7},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{,

title = {車両を用いたセンシングシステムの効率化},

author = {西井香織 and 伊藤昌毅 and 瀬崎薫 },

year  = {2016},

date = {2016-09-01},

booktitle = {電子情報通信学会ソサイエティ大会, 知的環境とセンサネットワーク, B-18-11},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{,

title = {モバイル環境センシングにおけるPerturbation後の復元精度推定手法の提案と評価},

author = {鈴木孝男 and 伊藤昌毅 and 瀬崎薫 },

year  = {2016},

date = {2016-05-01},

booktitle = {情報処理学会 モバイルコンピューティングとパーベイシブシステム研究会(MBL)},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{,

title = {火災検知情報の早期伝搬システムの設計},

author = {森英記 and 伊藤昌毅 and 瀬崎薫},

year  = {2016},

date = {2016-03-18},

booktitle = {電子情報通信学会 2016年総合大会, 知的環境とセンサネットワーク, B–18–61},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{110010038486,

title = {A Targeted Drug Delivery Approach using Molecular Communication},

author = {Yao Sun and Masaki Ito and Kaoru Sezaki},

url = {https://ci.nii.ac.jp/naid/110010038486/en/},

year  = {2016},

date = {2016-03-16},

booktitle = {Proceedings of the IEICE General Conference},

volume = {2016},

number = {2},

publisher = {The Institute of Electronics, Information and Communication Engineers},

address = {Fukuoka},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{kato2016,

title = {パーソナルデータの利活用に携わる人材における倫理的思考の形成過程について　――コンピュータ科学者の事例研究――},

author = {加藤弘則 and 伊藤昌毅 and 瀬崎薫 },

year  = {2016},

date = {2016-03-16},

booktitle = {電子情報通信学会 2016年総合大会, 技術と社会・倫理, A-12-2},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{110010038496,

title = {Inferring social relations with smartphone proximity networks},

author = {Jiang Tiantian and Masaki Ito and Kaoru Sezaki},

url = {https://ci.nii.ac.jp/naid/110010038496/en/},

year  = {2016},

date = {2016-03-01},

booktitle = {Proceedings of the IEICE General Conference},

volume = {2016},

number = {2},

publisher = {The Institute of Electronics, Information and Communication Engineers},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{,

title = {モバイルセンシングを用いた建築物の調査支援技術の開発},

author = {鵜飼祐太 and 伊藤昌毅 and 青木信夫 and 徐蘇斌 and 瀬崎薫 },

year  = {2016},

date = {2016-03-01},

booktitle = {電子情報通信学会総合大会, 知的環境とセンサネットワーク, B-18-22},

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@inproceedings{makiyama_2016,

title = {個体差を考慮した省電力動物間通信用デバイスの構築},

author = {牧山紘 and 永澤美保 and 瀬崎薫 and 小林博樹 },

year  = {2016},

date = {2016-03-01},

booktitle = {電子情報通信学会総合大会, 知的環境とセンサネットワーク, B-18-23},

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@inproceedings{suzuki2016_mbl,

title = {モバイルセンシングにおけるPerturbation後の復元精度推定},

author = {鈴木孝男 and 伊藤昌毅 and 瀬崎薫},

year  = {2016},

date = {2016-03-01},

booktitle = {電子情報通信学会総合大会, モバイルネットワークとアプリケーション, B-15-17},

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pubstate = {published},

tppubtype = {inproceedings}

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@inproceedings{inproceedingsd,

title = {Enhancing location prediction with big data: evidence from dhaka},

author = {Dunstan Matekenya and Masaki Ito and Ryosuke Shibasaki and Kaoru Sezaki},

doi = {10.1145/2968219.2968282},

year  = {2016},

date = {2016-01-01},

pages = {753-762},

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pubstate = {published},

tppubtype = {inproceedings}

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@inproceedings{Hyuga2016AnOL,

title = {An online localization method for a subway train utilizing the barometer on a smartphone},

author = {Satoshi Hyuga and Masaki Ito and Masayuki Iwai and Kaoru Sezaki},

year  = {2016},

date = {2016-01-01},

booktitle = {GIS '16},

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pubstate = {published},

tppubtype = {inproceedings}

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@inproceedings{inproceedingse,

title = {Poster: Spatio-Temporal Information Correction Mechanism for Wild Animal Wearable Sensors},

author = {Yuya Kamma and Kaoru Sezaki and Kobayashi Hiroki},

doi = {10.1145/2938559.2948794},

year  = {2016},

date = {2016-01-01},

pages = {40-40},

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pubstate = {published},

tppubtype = {inproceedings}

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@inproceedings{inproceedingsf,

title = {Poster: Discovering User Relationships Through Smartphone Wi-Fi Probes},

author = {Jiang Tiantian and Masaki Ito and Kaoru Sezaki},

doi = {10.1145/2938559.2948785},

year  = {2016},

date = {2016-01-01},

pages = {83-83},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

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@inproceedings{7749504,

title = {Adaptive code width protocol for mitigating intersymbol interference in diffusion-based molecular communication with mobile nodes},

author = {Y Sun and M Ito and K Sezaki},

year  = {2016},

date = {2016-01-01},

booktitle = {2016 IEEE 18th International Conference on e-Health Networking, Applications and Services (Healthcom)},

pages = {1-6},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

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@inproceedings{7511227,

title = {Democratic Privacy: A protocol-hidden perturbation scheme for pervasive computing},

author = {S Aoki and K Sezaki},

year  = {2016},

date = {2016-01-01},

booktitle = {2016 IEEE International Conference on Communications (ICC)},

pages = {1-6},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{7457100,

title = {Configuration-free propagation system for early fire alerts},

author = {H Mori and M Ito and K Sezaki},

year  = {2016},

date = {2016-01-01},

booktitle = {2016 IEEE International Conference on Pervasive Computing and Communication Workshops (PerCom Workshops)},

pages = {1-6},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{7511537,

title = {Wired and wireless network cooperation for quick recovery},

author = {Y Nakayama and K Maruta and T Tsutsumi and K Sezaki},

year  = {2016},

date = {2016-01-01},

booktitle = {2016 IEEE International Conference on Communications (ICC)},

pages = {1-6},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{7457150,

title = {Impact of time-varying population density on location privacy preservation level},

author = {Y Matsuno and M Ito and K Sezaki},

year  = {2016},

date = {2016-01-01},

booktitle = {2016 IEEE International Conference on Pervasive Computing and Communication Workshops (PerCom Workshops)},

pages = {1-6},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}