We present a novel ridge detector that nds ridges on vector elds. It is designed to automatically nd the right scale of a ridge even in the presence of noise, multiple steps and narrow valleys. One of the key features of such ridge detector is that it has a zero response at discontinuities. The ridge detector can be applied both to scalar and vector quantities such as color. We also present a p...

A detailed study of a 60 x 150 km area at 60øW, 24øN at the eastern end of the Nares Abyssal Plain indicates that hydrothermal circulation is still active in the 80 m.y.B.P. oceanic crust. The 58 heat flow measurements made at five stations in the area have revealed (1) constant heat flow over the abyssal plain (56 mW m-2), (2) a cyclic heat flow over the abyssal hills (mean of 77 mW m-2), and ...

1 Institute for Functional Imaging of Materials, Oak Ridge National Laboratory, Oak Ridge, TN 37831 2 Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831 3 Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 4 Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 5 Computation...

introduction in spite of multiple applications of bioactive glasses, these materials have not been evaluated yet for ridge augmentation. due to the large number of patients who need ridge augmentation and the benefits of nova bone, in comparison with other alloplasts, this study was fulfilled for evaluation of nova bone ability in ridge augmentation. methods the samples of this experimental stu...

[1] Two fore‐arc magmatic belts exist in Kodiak Island, the granitic Kodiak batholith and the basaltic trenchward belt. Both are part of the 2100 km long Sanak‐Baranof belt, interpreted to result from trench‐ridge‐trench (T‐R‐T) triple‐junction migration. In this hypothesis, trenchward belt basaltic rocks formed as the spreading ridge first entered the accretionary prism, and the larger Kodiak ...

This paper presents a novel concept of half wavelength doubleridged half height rectangular waveguide resonator. The basic design consists of a double-ridged rectangular waveguide placed between two rectangular waveguide WR2300. The resonance frequency, bandwidth, Q factor etc. can be controlled by varying the ridge parameters such as ridge length, width, height, ridge gap width, ridge gap heig...

Variable selection is an important part of most applications of statistical modeling. The variable selection problem is in biological applications often demanding, due to that the true underlying function in general is nonlinear and that datasets often contain multicollinearities, measurement-error variables, and outliers. We here introduce Ridge-SimSel, a simulation based variable selection me...

This paper proposes two new approaches for formant tracking using Fourier and wavelet ridges. The speech signal is decomposed into Time-Frequency representations issued from windowed Fourier transform and wavelet transform. Formant tracking is achieved by exploring ridges from time-frequency representation and imposing continuity constraints on formant trajectories. These approaches are validat...

Dan Lu, Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 ([email protected]). Guannan Zhang, Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 Clayton Webster, Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 Charlotte Barbier, Computational Sciences and Engineeri...

[i] An ongoing issue regarding the crustal evolution of Venus is whether or not certain features and processes occurred in the same sequence and at the same time globally. This paper seeks to test one aspect of "directional" models for the geologic history; the inference that all ridge belts are older than regional plains. This test involves traditional geologic analysis, but also involves the ...