SAKATA Sadahisa 坂田定久

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坂田定久サカタサダヒサ

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Researcher Number	60175362
Other IDs
Affiliation (based on the past Project Information) *help	2010: 大阪電気通信大学, 工学部, 教授 2004 – 2009: Osaka-Electro-Conmunication University, Faculty of Biomedical Engineering, 医療福祉工学部, 教授 2003 – 2004: 大阪電気通信大学, 工学部, 教授 1997 – 2003: 大阪電気通信大学, 工学部, 助教授 1991 – 1994: 大阪電気通信大学, 工学部, 助教授 1988 – 1989: 大阪電気通信大学, 助教授
Review Section/Research Field	Principal Investigator 解析学 / Basic analysis Except Principal Investigator 解析学 / Global analysis / Basic analysis / Basic analysis / Algebra / Global analysis
Keywords	Principal Investigator 周期解 / 0 / Influence on Characteristic roots by Parameters / Characteristic Equations / Asymptotic Stability / Two Kinds of Time Lags / Linear Differential Equations / パラメータの特性根への影響 / パラメータの特性方程式への影響 / 特性方程式 … More / 漸近安定性 / 2種類の時間遅れ / 線形微分方程式 / Cauchy-Kovalevskaya theorem / systems of partial differential equations / heat operator / singular boundary value problem / periodic solutions / Lienard system / 初期値問題の一意可解性 / Gevrayクラス / Lienard方程式系 / 一意可解性 / コーシー・コワレフスカヤの定理 / 偏微分方程式系 / 境界値問題 / 熱方程式 / リエナール方程式系 / リエナ-ル方程式系 … More Except Principal Investigator 双曲系 / characteristic exponent / 特性的初期値問題 / 特性指数 / 確定特異点 / フックス型偏微分方程式 / conservation laws / 漸近安定性 / 保存則系 / 波面追跡法 / 初期値問題 / Fixed Point Theorems / Oscillation / Boundary Value Problems / Asymptotic Behavior / Stability / フックス型変数 / entropy condition / Riemann問題 / エントロピー条件 / characteristic Cauchy problem / method of Frobenius / regular singularity / Fuchsian partial differential equations / フックス型偏微分作用素 / フロベニウスの方法 / phase boundary / asymptotic stability / Initial value problem / hyperbolic system / 相境界 / Witt表現 / Artin近似定理 / Frobenius写像 / パラメーター系 / Big Cohen-Macaulay加群 / ホモロジー予想 / 気体力学 / 保存則 / 衝撃波 / 偏微分方程式 / Liaqunov's Method / Periodisity / Ordinary Differential Equations / 振動性 / 漸近性 / 解の一意性 / 常微分方程式 / 不動点定理 / リヤプノフの方法 / 解の振動性 / 境界値問題 / 周期解 / 漸近的性質 / 安定性 / 常微分方程式系 / Liapunov's Method / Periodicity / dinary Differential Equations / approximation theorem / Witt expression / Frobenius map / monomial conjecture / Homological Conjectures / system of parameters / big Cohen-Macaulay module / Noetherian local ring / 完備局所環 / パラメータ系 / 標数 / 単項予想 / ネータ局所環 / Viscous shock profile / undercompressive shock wave / overcompressive shock wave / gas dynamics / shock waves / 零解 / 粘性進行波 / 粘性衝撃波 / 不足圧縮衝撃波 / 過圧縮衝撃波 / complex domain / Cauchy problem / uniqueness / singular point / Fuchsian variable / Fuchsian p.d.e. / degenerate p.d.e. / グルサ問題 / 複素領域 / コーシー問題 / 一意性 / 特異点 / 退化した偏微分方程式 / Volevicタイプシステム / umbilic point / Riemann problem / 軌道接続問題 / 不完全圧縮衝撃波 / 臍点 / Difference Equation / Holling Type / Permanence / Global Asymptotic Stability / Prey-Predator Model / Lotka-Volterra Equation / Delay Differential Equation / Functional Differential Equation / 大域的漸近安定 / 時間遅れを含む微分方程式 / 差分方程式 / ホリング型 / パーマネンス / 大域的漸近安定性 / 被食者・捕食者モデル / ロトカ・ヴォルテラ方程式 / 時間遅れをもつ微分方程式 / 関数微分方程式 / ワックス型偏微分作用素 / differential-difference equation / Gevrey class / wave-front tracking / 遅れ微分方程式 / Gevrey-級関数 / 不確定性原理 / 信号の幅 / ヒルベルト変換 / 偏長楕円体波動関数 / 信号限分離 / 信号の中心と幅 / リース変換 / フーリエ乗算作用素 / モノジェニック信号 / 信号源分離 / ウェーブレット / 平行移動不変性 / フレーム / 画像分離 / ブラインド信号源分離 / 解析信号 / ウェーブレット解析 / 関数方程式 / 交叉予想 / Tight Closure / Tight closure / 完備局所環の構造定理 / 有限生成加群 / ネター局所環 / 環論 / 多相流体 / Darcyの法則 / エントロピー / 保存 / 非線形現象 / Gevreyクラス / 行列 / 双曲型方程式 Less

Degenerate Partial Differential Equations, Wavelet Transform, and their Applications
- Principal Investigator
  
  MANDAI Takeshi
- Project Period (FY)
  2008 – 2010
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Osaka Electro-Communication University
Study of Noetherian local rings in commutative algebra
- Principal Investigator
  
  NISHIMURA Jun-ichi
- Project Period (FY)
  2007 – 2009
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Osaka Electro-Communication University
Mathematical Analysis of Model Equations of Multi-Phase Flow Phenomena in Porous Media
- Principal Investigator
  
  ASAKURA Fumioki
- Project Period (FY)
  2005 – 2008
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Global analysis
- Research Institution
  Osaka Electro-Communication University
Study on Noetherian Local Rings in Commutative Algebra
- Principal Investigator
  
  NISHIMURA Jun-ichi
- Project Period (FY)
  2004 – 2006
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Algebra
- Research Institution
  Osaka Electro-Communication University
Structure of Solutions to partial differential equations degenerating on several hypersurfaces
- Principal Investigator
  
  MANDAI Takeshi
- Project Period (FY)
  2003 – 2004
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Osaka-Electro-Conmunication University
Existence and Stability of Non-classical Weak Solutions to Hyperbolic Conservation Laws
- Principal Investigator
  
  ASAKURA Fumioki
- Project Period (FY)
  2003 – 2004
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Global analysis
- Research Institution
  Osaka-Electro Communication University
Influence on Behavior of Solutions of Differential Equations by Two Kinds of Time LagsPrincipal Investigator
- Principal Investigator
  
  SAKATA Sadahisa
- Project Period (FY)
  2002 – 2003
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Osaka Electro-Communication University
Structure of the Solutions to Partial Differential Equations Degenerating on the Initial Surface, and its Applications
- Principal Investigator
  
  MANDAI Takeshi
- Project Period (FY)
  2000 – 2002
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Osaka Electro-Communication University
Theoretical Study of the Functional Differential Equations using Computer Simulation
- Principal Investigator
  
  HARA Tadayuki
- Project Period (FY)
  1999 – 2000
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Global analysis
- Research Institution
  Osaka Prefecture University
Cauchy Problem for Hyperbolic System of Conservation Laws
- Principal Investigator
  
  ASAKURA Fumioki
- Project Period (FY)
  1999 – 2000
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Global analysis
- Research Institution
  Osaka Electro-Communication University
Structure of the Solutions to Partial Differential Equations Degenerating on the Initial Surface
- Principal Investigator
  
  MANDAI Takeshi
- Project Period (FY)
  1998 – 1999
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Basic analysis
- Research Institution
  Osaka Electro-Communication University
  Gifu University
Cauchy Problem for Hyperbolic System of Conservation Laws
- Principal Investigator
  
  ASAKURA Fumioki
- Project Period (FY)
  1997 – 1998
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Osaka Electro-Communication University
常微分方程式の解の漸近的性質の研究Principal Investigator
- Principal Investigator
  
  坂田定久
- Project Period (FY)
  1994
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Osaka Electro-Communication University
偏微分方程式系に対する初期値問題の研究
- Principal Investigator
  
  YAMAHARA Hideo
- Project Period (FY)
  1993
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Osaka Electro-Communication University
Stability for ordinary differential equations and its applicationsPrincipal Investigator
- Principal Investigator
  
  SAKATA Sadahisa
- Project Period (FY)
  1991 – 1992
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Osaka Electro-communication University
Asymptotic Behavior and Periodisity of Solutions of Differdntial Equations
- Principal Investigator
  
  YAMAMOTO Minoru
- Project Period (FY)
  1988 – 1990
- Research Category
  
  Grant-in-Aid for General Scientific Research (C)
- Research Field
  
  解析学
- Research Institution
  Osaka University

All 2004

All Journal Article

[Journal Article] Stability regions for linear differential equations with two kinds of time lags2004
- Author(s)
  SAKATA, Sadahisa, T.Hara
- Journal Title
  
  Funkcial.Ekvac. 47
  
  Pages: 129-144
- NAID
  130000141123
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15540221
[Journal Article] Stability regions for linear differential equations with two kinds of time lags2004
- Author(s)
  SAKATA, Sadahisa
- Journal Title
  
  Funkcial.Ekvac 47
  
  Pages: 129-144
- NAID
  130000141123
- Description
  「研究成果報告書概要(欧文)」より
- Data Source
  KAKENHI-PROJECT-15540221
[Journal Article] Stability Regions for Linear Differential Equations with Two Kinds of Time Lags2004
- Author(s)
  S.Sakata, T.Hara
- Journal Title
  
  Funkcial.Ekvac. 47
  
  Pages: 129-144
- NAID
  130000141123
- Description
  「研究成果報告書概要(和文)」より
- Data Source
  KAKENHI-PROJECT-15540188
[Journal Article] Stability regions for linear differential equations with two kinds of time lags2004
- Author(s)
  SAKATA, Sadahisa
- Journal Title
  
  Funkcial.Ekvac. 47
  
  Pages: 129-144
- NAID
  130000141123
- Data Source
  KAKENHI-PROJECT-15540221

1. YAMAHARA Hideo (30103344)

# of Collaborated Projects: 14 results

# of Collaborated Products: 0 results
2. ASAKURA Fumioki (20140238)

# of Collaborated Projects: 10 results

# of Collaborated Products: 0 results
3. MANDAI Takeshi (10181843)

# of Collaborated Projects: 8 results

# of Collaborated Products: 0 results
4. IGARI Katsuju (90025487)

# of Collaborated Projects: 4 results

# of Collaborated Products: 0 results
5. TAHARA Hidetoshi (60101028)

# of Collaborated Projects: 4 results

# of Collaborated Products: 0 results
6. MIZOHATA Sigeru (20025216)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
7. NISHIMURA Jun-ichi (00025488)

# of Collaborated Projects: 3 results

# of Collaborated Products: 0 results
8. YASHIRO Yoshimatsu (10140229)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
9. MIYAZAKI Mitsuhiro (90219767)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
10. HARA Tadayuki (20029565)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
11. ASHINO Ryuichi (80249490)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
12. MORIMOTO Akira (50239688)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
13. SHIGA Kiyoshi (10022683)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
14. 浅川秀一 (00211003)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
15. 室政和 (70127934)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
16. SUGIE Jitsuro (40196720)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
17. YONEYAMA Toshiaki (40175021)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
18. MA Wanbiao (30305651)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
19. MIYAZAKI Rinko (40244660)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
20. NAGABUCHI Yutaka (60252607)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
21. YAMAMOTO Minoru (50029419)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
22. SAITO Seiji (90225714)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
23. MOHRI Masayuki (80127307)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
24. MARUO Kenji (90028225)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
25. OHNAKA Kohzaburo (60127199)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
26. 都田艶子 (80174150)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

SAKATA Sadahisa 坂田 定久

坂田 定久 サカタ サダヒサ

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Influence on Behavior of Solutions of Differential Equations by Two Kinds of Time LagsPrincipal Investigator

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常微分方程式の解の漸近的性質の研究Principal Investigator

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Stability for ordinary differential equations and its applicationsPrincipal Investigator

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SAKATA Sadahisa 坂田定久

坂田定久サカタサダヒサ