On the basis of tests with over 20 species of erect plants, we reported in 1962 (9) that a strong growth curvature develops in the axis when an erect plant is rotated slowly on a horizontal clinostat. A differential transport of endogenous auxin was indicated by the production of a similar, predictable curvature after the application of triiodobenzoic acid (TIBA) to 1 side of the immature axial...

Neural networks present an alternative approach for the character recognition problem. This paper describes the development of a recognition qs tem of multi-font character using topological feature extraction to recognize capital isolated letters. B y properly specijjing a set of features such as vertical, horizontal, and slant strokes, curvature, open and closed areas, named here “jundamental ...

Association field models have attempted to explain human contour grouping performance, and to explain the mean frequency of long-range horizontal connections across cortical columns in V1. However, association fields only depend on the pairwise statistics of edges in natural scenes. We develop a spectral test of the sufficiency of pairwise statistics and show there is significant higher order s...

Muons are the most numerous charged particles at sea level. The muon flux at ground-level has been measured many times in the past 50 years [1, 2, 3, 4, 5]. When muon decay is negligible (Eμ > 100/ cos θGeV, where θ is the polar angle of the incoming muon), and the curvature of the Earth can be neglected (θ < 70◦), the differential flux across a horizontal surface can be well described by the G...

We establish quaternionic contact (qc) versions of the so called Almost Schur Lemma, which give estimations qc scalar curvature on a compact manifold to be constant in terms norm $$[-1]$$ -component and trace-free part [3]-component horizontal Ricci tensor torsion endomorphism, under certain positivity conditions.

Transportation Research Record: Journal of the Transportation Research Board, No. 2291, Transportation Research Board of the National Academies, Washington, D.C., 2012, pp. 80–92. DOI: 10.3141/2291-10 Z. Li, Room 1249A Engineering Hall; M. V. Chitturi and A. R. Bill, Room B243 Engineering Hall; and D. A. Noyce, Room 1204 Engineering Hall, Traffic Operations and Safety Laboratory, Department of ...

introduction: complete knowledge of root canal curvature is a critical factor in successful dental treatment .the aim of this study was to investigate the direction, radius and degree of curvature of maxillary anterior teeth and the relation between radius and degree of curvature in babol city. methods &materials;: this study was performed on 242 anterior teeth radiographs were taken by periapi...

The index of a metric plays significant roles in differential geometry as it generates variety of vector fields such as space-like, time-like, and light-like fileds. With the help of these vector fields, we establish interesting properties on ( )-Sasakian manifolds, which was introduced by Bejancu and Duggal [1] and further investigated by Xufeng and Xiaoli [2]. Since Sasakian manifolds with in...

To optimize performances such as continuous curvature, safety, and satisfying curvature constraints of the initial planning path for driverless vehicles in parallel parking, a novel method is proposed to train control points Bézier curve using radial basis function neural network method. Firstly, composition working process an autonomous parking system are analyzed. An experiment concerning spa...