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Showing papers by "Young Jin Suh published in 2006"


Journal ArticleDOI
TL;DR: In this article, a characterization of real hypersurfaces of type B is given, that is, a tube over a totally real totally geodesic in complex two-plane Grassmannians with the shape operator A satisfying Af + fA = kf, k is non-zero constant.
Abstract: In this paper we give a characterization of real hypersurfaces of type B, that is, a tube over a totally real totally geodesic in complex two-plane Grassmannians with the shape operator A satisfying Af + fA = kf, k is non-zero constant, for the structure tensor f

81 citations


Journal ArticleDOI
TL;DR: In this paper, it was shown that there is no real hypersurface in complex projective space whose structure Jacobi operator is parallel in any direction of the maximal holomorphic distribution.
Abstract: We prove the non existence of real hypersurfaces in complex projective space whose structure Jacobi operator is parallel in any direction of the maximal holomorphic distribution.

46 citations


Journal ArticleDOI
TL;DR: In this paper, the vanishing Lie derivative of the shape operator along the direction of the Reeb vector field was used to characterize real hypersurfaces of type A in a complex two-plane Grassmannian G2(C m+2 ) which are tubes over totally geodesic G 2(Cm+1 ) in G2m+2 ).
Abstract: In this paper we give a characterization of real hypersurfaces of type A in a complex two- plane Grassmannian G2(C m+2 ) which are tubes over totally geodesic G2(C m+1 ) in G2(C m+2 ) in terms of the vanishing Lie derivative of the shape operator A along the direction of the Reeb vector field �.

31 citations


Journal ArticleDOI
TL;DR: In this article, the authors introduced the concept of conformal curvature-like tensors on a semi-Riemannian manifold, which is weaker than the notion of curvature tensors defined on a Riemannians manifold.

13 citations


Journal ArticleDOI
TL;DR: In this article, the authors introduced the notion of recurrent shape operator for real hypersurface M in the complex two-plane Grassmannians G2(Cm+2) and gave a non-existence property of real hypersuran surfaces in G 2 (Cm + 2) with the recurrent shape operators.
Abstract: We introduce the notion of recurrent shape operator for a real hypersurface M in the complex two-plane Grassmannians G2(Cm+2) and give a non-existence property of real hypersurfaces in G2(Cm+2) with the recurrent shape operator.

9 citations


Journal ArticleDOI
TL;DR: In this paper, a complete classification of Hopf pseudo-Einstein real hypersurfaces in complex two-plane Grassmannians G 2 (ℂ m +2 ) is given.
Abstract: In this paper we give a complete classification of - invariant or Hopf pseudo-Einstein real hypersurfaces in complex two-plane Grassmannians G 2 (ℂ m +2 ).

6 citations


Journal Article
TL;DR: An LA appears to be a safe and effective approach for patients with various adrenal pathologies and large sized adrenal lesions and it is expected the indications for an LA may be extended to large adrenal tumors as well as primary or metastatic malignant Adrenal lesions if the oncologic principles are obeyed.
Abstract: Purpose: The purpose of our study was to compare the outcomes of patients who had undergone a conventional open adrenalectomy (OA) with those who had undergone a laparoscopic adrenalectomy (LA) Methods: We retrospectively reviewed 66 patients who underwent an adrenalectomy between 1990 and 2005 The study group was comprised of 41 laparoscopic cases with 25 open adrenalectomy cases comprising the control group The parameters studied included the operating times, transfusion volumes, time to resumption of a soft diet, total frequency of analgesics, time to return to free ambulation and length of hospital stay in both the OA and LA groups Results: No mortality was observed in either the OA or LA groups The operating times were, on average, 2031645 and 1582764 minutes in the OA and LA group, respectively (P=0011) 10 cases in the OA group needed a transfusion (average: 4385268757 ml), but two cases including one require conversion to a celiotomy, due to a right renal vein injury, needed a transfusion (average: 234111063 ml)(P=0004) The patients of the OA and LA groups began soft diets on the 4811 (37 days) and 2715 postoperative days (18 days), respectively (P=0004) Total frequencies of analgesics were 95±65 and 4447 in the OA and LA groups, respectively (P=0001) The times needed to return to free ambulation were 7638 and 4323 days in the OA and LA groups, respectively (P=0000) Postoperative hospital stays were 16375 and 7323 days in the OA and LA groups, respectively (P=0000) Conclusion: An LA appears to be a safe and effective approach for patients with various adrenal pathologies and large sized adrenal lesions We expect the indications for an LA may be extended to large adrenal tumors as well as primary or metastatic malignant adrenal lesions if the oncologic principles are obeyed (J Korean Surg Soc 2006;70:363-369)

4 citations



01 Jan 2006
TL;DR: In this article, complete maximal space-like hypersurfaces with constant Gauss-Kronecker curvature in an anti-de Sitter space H 4 (i1) are proved isometric to the hyperbolic cylinder H 2 (c1)£H 1 (c2) with S = 3 or they satisfy S • 2, where S denotes the squared norm of the second fundamental form.
Abstract: In this paper, we study complete maximal space-like hypersurfaces with constant Gauss-Kronecker curvature in an anti- de Sitter space H 4(i1). It is proved that complete maximal space- like hypersurfaces with constant Gauss-Kronecker curvature in an anti-de Sitter space H 4 (i1) are isometric to the hyperbolic cylinder H 2 (c1)£H 1 (c2) with S = 3 or they satisfy S • 2, where S denotes the squared norm of the second fundamental form.