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Recurrent Jacobi operator of real hypersurfaces in complex two-plane Grassmannians
정임순,Juan de Dios Perez,Young Jin Suh 대한수학회 2013 대한수학회보 Vol.50 No.2
In this paper we give a non-existence theorem for Hopf hy- persurfaces in the complex two-plane Grassmannian G2(Cm+2) with re- current normal Jacobi operator ¯RN.
Real Hypersurfaces with Invariant Normal Jacobi Operator in the Complex Hyperbolic Quadric
정임순,김규종 경북대학교 자연과학대학 수학과 2020 Kyungpook mathematical journal Vol.60 No.3
We introduce the notion of Lie invariant normal Jacobi operators for real hypersurfaces in the complex hyperbolic quadric Qm∗ = SOom,2/SOmSO2. The invariant normal Jacobi operator implies that the unit normal vector field N becomes $\frak A$-principal or A-isotropic. Then in each case, we give a complete classification of real hypersurfaces in Qm∗= SOom,2/SOmSO2 with Lie invariant normal Jacobi operators.
Cyclic Structure Jacobi Semi-symmetric Real Hypersurfaces in the Complex Hyperbolic Quadric
정임순,서영진 경북대학교 자연과학대학 수학과 2023 Kyungpook mathematical journal Vol.63 No.2
In this paper, we introduce the notion of cyclic structure Jacobi semi symmetric real hypersurfaces in the complex hyperbolic quadric Qm* = SO0 2,m/SO2SOm. We give a classifiction of when real hypersurfaces in the complex hyperbolic quadric Qm* having A-principal or A-isotropic unit normal vector fields have cyclic structure Jacobi semi-symmetric tensor.
REAL HYPERSURFACES IN COMPLEX TWO-PLANE GRASSMANNIANS WITH LIE ξ-PARALLEL NORMAL JACOBI OPERATOR
정임순,서영진 대한수학회 2008 대한수학회지 Vol.45 No.4
In this paper we give some non-existence theorems for real hypersurfaces in complex two-plane Grassmannians G₂(Cm+²) with Lie ξ-parallel normal Jacobi operator RN and another geometric conditions In this paper we give some non-existence theorems for real hypersurfaces in complex two-plane Grassmannians G₂(Cm+²) with Lie ξ-parallel normal Jacobi operator RN and another geometric conditions
SEMI-SYMMETRIC STRUCTURE JACOBI OPERATOR FOR REAL HYPERSURFACES IN THE COMPLEX QUADRIC
정임순,김규종,우창화 대한수학회 2023 대한수학회보 Vol.60 No.4
In this paper, we introduce the notion of {\it semi-symmetric structure Jacobi operator } for Hopf real hypersufaces in the complex quad\-ric $Q^m = SO_{m+2}/SO_mSO_2$. Next we prove that there does not exist any Hopf real hypersurface in the complex quadric $Q^m = SO_{m+2}/SO_mSO_2$ with semi-symmetric structure Jacobi operator. As a corollary, we also get a non-existence property of Hopf real hypersurfaces in the complex quadric $Q^m$ with either symmetric (parallel), or recurrent structure Jacobi operator.
정임순,서영진,Mukut Mani Tripathi 대한수학회 2012 대한수학회보 Vol.49 No.2
In this paper we give a characterization of real hypersurfaces of type (A) in a complex two-plane Grassmannian $G_2(\mathbb{C}^{m+2})$ which is a tube over a totally geodesic $G_2(\mathbb{C}^{m+1})$ in $G_2(\mathbb{C}^{m+2})$, in terms of two commuting conditions related to the normal Jacobi operator and the shape operator.
Hopf hypersurfaces in complex two-plane Grassmannians with Lie parallel normal Jacobi operator
정임순,이현진,서영진 대한수학회 2011 대한수학회보 Vol.48 No.2
In this paper we give some non-existence theorems for Hopf hypersurfaces in the complex two-plane Grassmannian G_2(C^(m+2)) with Lie parallel normal Jacobi operator [기호]_N and totally geodesic [기호]and [기호]components of the Reeb flow.
Commuting structure Jacobi operator for Hopf hypersurfaces in complex two-plane Grassmannians
정임순,서영진,양해영 대한수학회 2009 대한수학회보 Vol.46 No.3
In this paper we give a non-existence theorem for Hopf real hypersurfaces in complex two-plane Grassmannians G_(2)(C^(m+2)) satisfying the condition that the structure Jacobi operator R_(ξ) commutes with the 3-structure tensors Φ_(i),i=1,2,3.
정임순 ( Im Soon Jeong ) 한남대학교 사회과학연구소 2015 사회과학연구 Vol.24 No.-
중도 시각장애인의 경우 시각장애에 의한 정신적 충격이 선천성 시각장애인에 비해 더크다. 이는 실명 이전에는 세상의 만물을 보아왔기 때문이다. 따라서 어느 날을 기점으로 하여 이제부터는 세상을 보지 못한다는 두려움과 공포에 의한 정신적 충격과 좌절은 실로 상당히 크다. 이처럼 중도 시각장애인은 정신적으로 좌절감을 겪게 되는데 이의 좌절감이 심하면 자살이라는 극단적 선택까지 하게 된다. 때문에 중도 시각장애인의 심리적 재활에 있어 좌절감은 대단히 중요한 문제이다. 이에 본 연구에서는 중도 시각장애인에게 좌절감을 유발하는 기제가 무엇인지 Max van Manen의 해석학적 현상학적 질적연구에 의해 밝혀보고자 하였다. 본 연구에서는 중도 시각장애인에게 좌절감을 유발시키는 기제를 확인하기 위하여 ‘치료’, ‘실명’, ‘직업’, ‘격리와 우롱’이라는 본질적 주제와 ‘실명통보’, ‘치유에 대한 체념’, ‘진행성실명’, ‘실명인정’, ‘직업상실’, ‘취업을 위한 재교육’, ‘의사소통 단절’, ‘소외’, ‘조롱’이라는 하위 주제를 도출하였다. 그리고 본질적 주제를 범주화하여 분석한 결과 이들 하위 주제가 곧중도 시각장애인에게 좌절감을 유발하는 기제가 된다는 것을 확인하였다. Person with lately visual impairments is more than shocked to psychology of the congenital blind by visual impairment. The reason is that they have seen all things of the world. Therefore, it is a severe mental shock and frustration to newly blinded person with fear and panic that they cannot see the world from now on. Based on this, newly blinded person get psychologically frustrated resulting in committing suicide; thus, controlling frustration is the vital factor in psychological rehabilitation of newly blinded person. Herein, we demonstrate which mechanism results in people’s frustration with acquired visual impairments by Max van Manen’s hermeneutic phenomenological qualitative research approach. In this study, in order to check mechanism which induces newly blinded person’s frustration, it was divided into essential subjects, ‘treatment’, ‘blindness’, ‘occupation’, ‘isolation and derision’, and sub-themes, ‘blindness notice’, ‘resignation for healing’, ‘progressive blindness’, ‘blindness recognition’, ‘job loss’, ‘re-education for employment’, ‘communication disconnection’, ‘alienation’, ‘ridicule’. As a result of analysis by classification of the essential subject matter, it was confirmed that these sub-topics was the mechanism which induced newly blinded person’s frustration.