Generalized Calabi type Kahler surfaces

In this paper we give classification of K\"ahler surfaces of generalized Calabi type.Comment: 15 pages. arXiv admin note: text overlap with arXiv:1802.1047

K\"ahler manifolds with homothetic foliations by curves

The aim of this paper is to classify compact, simply connected K\"ahler manifolds which admit totally geodesic, holomorphic complex homothetic foliation by curves.Comment: 19 pages. arXiv admin note: substantial text overlap with arXiv:0806.470

Compact conformally Kahler Einstein-Weyl manifolds

We give a classification of compact conformally Kahler Einstein-Weyl manifolds whose Ricci tensor is hermitian.Comment: 11 page

Psychomotor Functions and Interval Timing in Patients Receiving Intravenous Anesthesia for Endoscopic Procedures: The Pilot Study

Introduction. The aim of this study was to evaluate two measures in a cognitive examination: psychomotor function and the perception of time (PT) in patients after intravenous anesthesia for endoscopic procedures. Material and Methods. We tested 23 anesthetized patients (Anesthesia Group, AG) and 17 not anesthetized patients (Control Group, CG). The Dufour Cross-Shaped Apparatus (DA) was used to assess quick reactions. Perception of time (PT) was measured for 1-, 2-, 5-, and 7-second intervals. The tests were performed before the anesthesia was administered and 1.5, 3, and 6 hours after the procedure was completed. Results. The intervals that were generated and the reproduced visual stimuli were shorter than the patterns. The reproduced 1- and 2-second auditory stimuli were longer than the patterns. The remaining reproduced auditory impulses were shorter than the patterns. Conclusions. In anesthetized patients, quick psychomotor reactions and the ability to time intervals are preserved 1.5 h and later after intravenous anesthesia for endoscopy

Kahler manifolds with quasi-constant holomorphic curvature

The aim of this paper is to classify compact Kahler manifolds with quasi-constant holomorphic sectional curvature.Comment: 18 page

Affine surfaces with parallel shape operators

We study affine nondegenerate Blaschke hypersurfaces whose shape operators are parallel with respect to the induced Blaschke connections. We classify such surfaces and thus give an exact classification of extremal locally symmetric surfaces, first described by F. Dillen

Twistor Bundle of a Neutral Kähler Surface

In this paper, we characterize neutral Kähler surfaces in terms of their positive twistor bundle. We prove that an O+,+(2,2)-oriented four-dimensional neutral semi-Riemannian manifold (M,g) admits a complex structure J with ΩJ∈⋀−M, such that (M,g,J) is a neutral-Kähler manifold if and only if the twistor bundle (Z1(M),gc) admits a vertical Killing vector field