工学修士, 横浜国立大学, Mar. 1988

Ph.D. in Engineering, Yokohama National University, Mar. 1995

金属薄膜初期成長過程の漸近的性質

Nanotechnology/Materials, Thin-film surfaces and interfaces

Nanotechnology/Materials, Nanostructure physics

01 Apr. 2021
国際教育センター, 准教授

01 Feb. 2017 - 31 Mar. 2021
国際教育センター, 講師

01 Apr. 2010 - 31 Jan. 2017
国際交流センター, 講師

Aug. 1996 - 31 Mar. 2010
Faculty of electro-communications, The Univ. of Electoro-Comm., Assistant professor

Apr. 1988 - Aug. 1991
Yokohama National University, Graduate School of Engineering, Division of Mechanical Engineering and Materials Science, 博士後期課程

Apr. 1986 - Mar. 1988
Yokohama National University, Graduate School of Engineering, Division of Mechanical Engineering and Materials Science, 博士前期課程

Apr. 1982 - Mar. 1986
Tokai University, Faculty of Engineering, 応用物理学科

01 Apr. 1979 - 31 Mar. 1982
東京都立小平西高等学校

Scaling analysis for submonolayer growth of point islands based on Widom scaling law
Hisashi NAKAI
Bulletin of the University of Electro-Communications, 34, 1, 23-31, 01 Feb. 2022, Peer-reviwed
Research institution, Japanese

Scaling form of capture-zone distribution in four-dimensional growth of point island
Hisashi NAKAI
Bulletin of the University of Electro-Communications, 32, 1, 47-53, 01 Feb. 2020, Peer-reviwed
Research institution, Japanese

Spatial dimension dependence for the average capture number in submonolayer growth of point islands
Hisashi NAKAI
電気通信大学紀要, 31, 1, 97-103, 01 Feb. 2019, Peer-reviwed
Research institution, Japanese

Scaling theory for submonolayer growth of point Islands based on the minimal model
Hisashi NAKAI
Bulletin of The University of Electro-Communications, The University of Electro-Communications, 30, 1, 300107, 01 Feb. 2018, Peer-reviwed
Research institution, Japanese

Asymptotic analysis for cumulative local size for one-dimensional submonolayer growth
Hisashi NAKAI
Bulletin of The University of Electro-Communications, The University of Electro-Communications, 29, 1, 290105-290105, 01 Feb. 2017, Peer-reviwed, By dimensional analysis, it is confirmed that a cumulative local size xy for one-dimentional irreversible submonolayergrowth of point islands [J. G. Amar and M. N. Popescu, Surf. Sci. 419, 239 (2001)] is expressed bya function of scaled gap length Y and dimensionless deposition time R1/3θ, where R is the ratio of the monomerdiffusion rate to the deposition rate and θ is coverage. Using asymptotic analysis for xy as the limit R Ishow that xy/sav I = 1/B ∫ 1 ϕY uα tanh (YBu−α) du, where B is a certain monotonically decreasing function ofthe variable R1/3θ, α is dynamical exponent of nucleation length and sav is average size. At both of the numericalresult of xy/sav and the approximate analytical evaluation for the integral I with Taylor expansion in YB for theintegrand, correction term for Y Y−3( or limit of xy/sav as is shown to be proportional to (R1/3θ)−3/4,and the analytical evaluation is in good agreement with the numerical result in R1/3θ 400. Finally, I findanother evaluation for I with the expansion in α to improve the deviation in 100 R1/3θ < 400.
Research institution, Japanese

Information Processing Exercises Designed for Undergraduate International Students at the University of Electro-Communications
NAKAI Hisashi
The Tama Bulletin of International Student Education, 電気通信大学国際交流推進センター ; 2006-, 10, 10, 31-35, Mar. 2016, Peer-reviwed
Research society, Japanese

Power Series Expansion and Analysis for Logarithm of q-Shifted Factorial
NAKAI, Hisashi
Bulletin of the University of Electro-Communications, 28, 1, 1-9, 02 Feb. 2016, Peer-reviwed
Research institution, Japanese

Numerical Solutions and Error Estimation for the Gap length in One-dimensional Submonolayer Film Growth
NAKAI, Hisashi
Bulletin of the University of Electro-Communications, 電気通信大学, 27, 1, 37-43, 27 Feb. 2015, Peer-reviwed, Numerical solutions and an error estimation formula for gap ys between an island with size s and another island in one-dimensional submonolayer growth are presented. The origin of the error is assumed to be the numerical integral computation included in an equation for the ys. In order to evaluate the error for YM, which is the numerical approximation of ys, numerical integrations in the equation of ys are calculated with composite trapezoidal rule using 1/2M, M and 2M of number of equal divided interval. As a result, the error of the gap for M = 213 of the divided number is a onethird for the difference Ys M/2 Ys M . Similarly, the error for the numerical solution of the island size distribution Ns M is the 1/4.2 of Ns M/2 Ns M and was less than 7 × 10--9. My size-distribution result is compared to both the results of literature on the kinetic Monte-Carlo simulation and the rate equation.
Research institution, Japanese

Exercises in introductory physics for international freshmen at UEC
NAKAI Hisashi
The Tama Bulletin of International Student Education, 電気通信大学国際交流推進センター, 8, 8, 51-55, Mar. 2012, Peer-reviwed
Research society, Japanese

Preparatory Engineering Related Education of Japan-Korea Joint Government Scholarship Program for the Students in Science and Engineering Departments at UEC Tokyo
NAKAI Hisashi; HAMANO Tetze
The Tama Bulletin of International Student Education, 電気通信大学国際交流推進センター, 8, 8, 57-61, Mar. 2012, Peer-reviwed
Research society, Japanese

A Report on the Preparatory Engineering Education for International Undergraduate Students in UEC
lKOYAMA Naoto; OKUYAMA Naoki; NAKAI Hisashi
多摩留学生教育研究論集, Tokyo Gakugei University, 5, 71-74, Mar. 2006, Peer-reviwed
Research institution, Japanese

Synthesis of Fe2W by low pressure laser spraying
Y Isshiki; J Shi; H Nakai; M Hashimoto
SURFACE & COATINGS TECHNOLOGY, 151, 325-328, Mar. 2002, Peer-reviwed
Scientific journal, English

Microstructure, microhardness, composition, and corrosive properties of stainless steel 304 II. Low-pressure laser spraying with silicon
Y Isshiki; J Shi; H Nakai; M Hashimoto
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 70, 6, 651-656, Jun. 2000
Scientific journal, English

Epitaxial growth structure and physical properties of Fe film biased dc-plasma sputter deposited on MgO(001)
CC Chen; JP Yang; H Nakai; M Hashimoto
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 18, 3, 819-822, May 2000
Scientific journal, English

Microstructure, microhardness, composition, and corrosive properties of stainless steel 304 - I. Laser surface alloying with silicon by beam-oscillating method
Y Isshiki; J Shi; H Nakai; M Hashimoto
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 70, 4, 395-402, Apr. 2000
Scientific journal, English

Si（001）およびSiO_x_基板上のCuSi_x_真空蒸着薄膜の電気特性と構造
松原裕人; 楊 季平; 牧原健二; 史 蹟; 中井日佐司
第47回応用物理学関係連合講演会講演予稿集Ⅱ, 599, Mar. 2000
Japanese

分子線蒸着法によるSi（111）面上のCu薄膜初期成長過程Ⅱ
水島博昭; 史 蹟; 中井日佐司; 橋本 満
第61回応用物理学会講演予稿集Ⅱ, 488, 2000
Japanese

GaAs（001），Si（001）およびSiO_2_基板上のCu，Cu-13%Si真空蒸着薄膜の電気特性と構造
楊 季平; 松原裕人; 牧原健二; 史 蹟; 中井日佐司; 橋本 満
第60回応用物理学会学術講演会予稿集Ⅱ，甲南大学, 497, Sep. 1999
Japanese

分子線蒸着法によるSi（111）面上でのCu薄膜初期成長過程（２）
小中敏寛; 中井日佐司; 橋本 満
第59回応用物理学会学術講演会講演予稿集２, 530, Sep. 1998
Japanese

Intial growth process of Permalloy films epitaxially grown on MgO（001）by dc biased plasma sputtering
石野正樹; 楊 季平; 史 蹟; 中井日佐司; 橋本 満
第59回応用物理学会学術講演会講演予稿集２, 536, Sep. 1998
Japanese

Growth structure of nickel films on GaAs(001) by dc-biased plasma-sputter-deposition
JP Yang; K Makihara; H Nakai; M Hashimoto; A Barna; PB Barna
THIN SOLID FILMS, 319, 1-2, 115-119, Apr. 1998, Peer-reviwed
Scientific journal, English

Electrical property on copper thin film with chromium under-layer
H Nakai; K Fudaba; K Shinzawa; M Hashimoto
THIN SOLID FILMS, 317, 1-2, 202-205, Apr. 1998, Peer-reviwed
Scientific journal, English

Microhardness, microstructure and composition behavior of stainless steel 304 laser surface alloyed with silicon
Y Isshiki; H Nakai; M Hashimoto
TRENDS AND NEW APPLICATIONS OF THIN FILMS, 287-2, 263-266, 1998
Scientific journal, English

Phase change during the initial of Ni30Fe70(Invar) films on MgO(001) by DC-biased plasma-sputter-deposition
JP Yang; K Makihara; H Nakai; J Shi; M Hashimoto; A Barna; PB Barna
TRENDS AND NEW APPLICATIONS OF THIN FILMS, 287-2, 347-350, 1998
Scientific journal, English

A MODELING OF DIAMOND NUCLEATION
S YUGO; K SEMOTO; K HOSHINA; T KIMURA; H NAKAI
DIAMOND AND RELATED MATERIALS, 4, 7, 903-907, May 1995
Scientific journal, English

GROWTH-KINETICS OF ANTIMONY LAYERS PREPARED ON SIOX BY MOLECULAR-BEAM DEPOSITION
H NAKAI; D BABA; A KOSUGE; M HASHIMOTO
THIN SOLID FILMS, 259, 1, 32-37, Apr. 1995, Peer-reviwed
Scientific journal, English

AUGER-ELECTRON SPECTROSCOPY ELECTRON ENERGY-LOSS SPECTROSCOPY LOW-ENERGY ELECTRON-DIFFRACTION STUDY OF A V6C5 (100) SURFACE
S USAMI; H NAKAI; T YAGUCHI; Y KUMASHIRO; A FUJIMORI
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 5, 4, 985-988, Jul. 1987
Scientific journal, English

留学生向け物理学概論第二再履修支援
Apr. 2024 - Present
電気通信大学国際教育センター, 学域留学生で物理学概論第二(熱・電磁気)再履修者に対する学修支援。前期開講。, Others

留学生向け物理学概論第一再履修支援
Oct. 2023 - Present
電気通信大学国際教育センター, 学域留学生で物理学概論第一(力学・波動)再履修者に対する学修支援。後期開講。, Others

Applied Physics Laboratory Ⅱ
Oct. 2016 - Present
The University of Electro-Communications, Undergraduate special subjects

Ｉｎｆｏｒｍａｔｉｏｎ Ｐｒｏｃｅｓｓｉｎｇ ＥｘｅｒｃｉｓｅII
Oct. 2016 - Present
The University of Electro-Communications, Undergraduate special subjects

Elementary Exercises in Physics II
Oct. 2016 - Present
The University of Electro-Communications, Undergraduate special subjects

Ｉｎｆｏｒｍａｔｉｏｎ Ｐｒｏｃｅｓｓｉｎｇ Ｅｘｅｒｃｉｓｅ I
Apr. 2016 - Present
The University of Electro-Communications, Undergraduate special subjects

Ｓｃｉｅｎｃｅ ａｎｄ Ｔｅｃｈｎｏｌｏｇｙ ｉｎ Ｊａｐａｎ Ａ
Apr. 2016 - Present
The University of Electro-Communications, Others

Elementary Exercises in Physics Ⅰ
Apr. 2016 - Present
The University of Electro-Communications

Ｉｎｆｏｒｍａｔｉｏｎ Ｐｒｏｃｅｓｓｉｎｇ Ｅｘｅｒｃｉｓｅ
The University of Electro-Communications

情報処理演習第一
電気通信大学

Ｓｃｉｅｎｃｅ ａｎｄ Ｔｅｃｈｎｏｌｏｇｙ ｉｎ Ｊａｐａｎ Ａ
The University of Electro-Communications

Aug. 1987 - Present
応用物理学会

Development of on-line educational materials for fundamental subjects of engineering for non-native Japanese speaking students
TAKEDA Yuko; SHIGA Mikio; NAKAI Hisashi; WATANABE Shigeyoshi; SUZUKI Masahisa
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (C), The purpose of this study is the development of on-line educational materials of fundamental subjects of engineering for students who are non-native speakers of Japanese. This was pursued through the following investigations. 1. Investigation of vocabulary and expressions found in mathematics textbooks used in Japanese high schools. (1) Listing mathematical vocabulary and expressions found in the textbooks Differential, in Mathematics II, and Mathematics III. The complete list contains a total of 3367 vocabulary items, collocations, sentence patterns, and discourse patterns. (2) Translating the Japanese expressions in this list into Chinese and Korean. (3) Contrasting these translations in order to analyze differences among the three languages and difficulties for non-native speakers of Japanese. 2. Investigation of mathematic problem solving by Chinese students. Two studies were conducted : 1) a study of Japanese expressions found in the solutions of differential problems calculated by Chinese students and 2) a study of the relations among Japanese language ability, mathematical ability, and the understanding and solving of mathematic problems by Chinese students. In study 1), it was found that low Japanese proficiency students use only a "noun WA noun" structure and some basic conjunctions. It was also found that it is difficult for both low and high Japanese proficiency students to use Japanese expressions for naming and replacement in the absence of a model. In study 2), it was found that students with low Japanese proficiency but an adequate background in mathematics can solve mathematical problems written in Japanese. It was also found that Japanese proficiency equivalent to grade 2 of the Japanese proficiency test is necessary for solving such mathematical.problems., 17520344
2005 - 2007

Preparation and Characterization of Nitride-base Magnetic nanocomposite films
HASHIMOTO Mitsuru; NAKAI Hisashi; SHI J.
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (C), In this work, the preparation and characterization of Co-Ti-N films have been conducted. First, we have disclosed the relation between the preparation condition and the structure of the Co-Ti-N films. Co-Ti-N films have been prepared by dc sputtering of Co-Ti complex target in Ar +N_2 gas mixture. For the films deposited at appropriate N_2 partial pressure, the reaction between Ti and N occurs to form TiN during post-deposition thermal anneal. As a result Co and Ti separate with each other, to form Co-TiN nano-composite. The sizes of Co and TiN grains in the longitude direction are about 10 nm in diameter. And fiber-like structure is developed along the normal direction of the film surface. Next the magnetic properties of the Co-TiN nanocomposite films have been investigated. It has been found Co-TiN nanocomposite films with their thickness less than 100 nm show similar magnetization behavior in both longitude and perpendicular directions. However, those films with their thickness above 100 nm show perpendicular magnetic anisotropy, I.e. perpendicular direction becomes the easy axis of magnetization. Furthermore, the dependence of magnetic properties on the thermal anneal condition and film structure have been investigated. The as-deposited films almost do not show ferromagnetic performance. When the films were annealed at 400 - 700℃, they show clearly ferromagnetic performance and the saturation magnetization increased with increasing anneal temperature. This is because that in the as-deposited state, Co atoms are bonded to Ti and N, upon thermal anneal at elevated temperature, N atoms preferentially react with Ti atoms, therefore, Co is separated. The magnetic properties of the Co-TiN films also depend strongly on the amount of N incorporated into the films. When N amount is too small, the phase separation can not fully proceed. On the other hand, when the N amount is too large, Co is also nitrided except Ti. Both cases will impair the saturation magnetization. Therefore it is important to control the N amount in the film. Beside the magnetic properties, we have found that the resistivity and hardness of Co-TiN nanocomposite films are very high compared with metal and alloy films. According to the result of this research work, we consider the Co-TiN-based nanocomposite films very promising as ultra-high density perpendicular magnetic recording media., 12650656
2000 - 2001

大学・学部・学科/部会・教科（含む実験等）の教育プログラム等の改善・修正などへの関与
Others, Planning etc, 01 Apr. 2024 - 31 Jul. 2024, 留学生向けネットワークポリシー講習(4月入学生) 4月入学院生・研究生の留学生対象ネットワークポリシー講習会の企画・実施。情報システム関連の手続・講習のために必要なwebclassへのアクセス方法、情報システム利用に関する誓約書の内容説明および提出、INFOSS受講登録を含む。また、受講登録方法や期限までに受講していない留学生に対するフォローアップ。

ネットワークポリシー研修
10月上旬〜中旬にネットワークポリシー研修(対面、オンデマンド+ヘルプデスク)開催。研究生・院生である留学生対象。参加者8名(対面 8名、オンデマンド+ヘルプデスク 0 名)。
Oct. 2024 - Oct. 2024

ネットワークポリシー研修
4月上旬〜中旬にネットワークポリシー研修(対面、オンデマンド+ヘルプデスク)開催。研究生・院生である留学生対象。参加者16名(対面 16名、オンデマンド 0 名)。
Apr. 2024 - Apr. 2024

2023年度国費学部留学生大学進学説明会（大阪大学）
ビデオ会議システム(ZOOM)を使用して、大阪大学で予備教育を受けている学部国費留学生向けに進学説明を行った。回数は30分を2回であり、15名の参加があった。
※2024年度は、この留学制度による留学生が4名配置された。
Nov. 2023 - Nov. 2023