Curve cracks lying along a parabolic curve in anisotropic body

1995 ◽  
Vol 16 (2) ◽  
pp. 115-124 ◽  
Author(s):  
Hu Yuan-tai ◽  
Zhao Xing-hua
Keyword(s):  
Anisotropic Body ◽  
Parabolic Curve

The elastic potential of a deformable anisotropic body

1991 ◽  
Vol 23 (3) ◽  
pp. 282-285
Author(s):  
P. F. Prasolov
Keyword(s):  
Anisotropic Body ◽  
Elastic Potential

scholarly journals Deformation and fracture process of granitic rocks as an anisotropic body.

1988 ◽  
pp. 179-188 ◽  
Author(s):  
Osam SANO ◽  
Yozo KUDO ◽  
Yoshiaki MIZUTA ◽  
Koji NAKAGAWA
Keyword(s):  
Fracture Process ◽  
Anisotropic Body ◽  
Granitic Rocks ◽  
Deformation And Fracture

scholarly journals Generation of a double-crowned involute helical gear with twist-free tooth flanks by a CNC hobbing machine with three synchronous axes

2017 ◽  
Vol 39 (2) ◽  
pp. 97-108
Author(s):  
Van-The Tran
Keyword(s):  
Computer Simulation ◽  
Rotation Angle ◽  
Computer Numerical Control ◽  
Helical Gear ◽  
Numerical Control ◽  
Production Costs ◽  
Parabolic Curve ◽  
Transmission Errors ◽  
Simulation Results ◽  
Center Distance

In the conventional hobbing process, a double-crowned involute helical gear is generated by the hob cutter with parabolic-curve tooth profiles for the cross-profile crowning and varied the center distance between the hob and work gear for the longitudinal crowning. Therefore, to cut a double-crowned helical gear not only requires at least four synchronous axes and hob cutter regrinding (which increases production costs) but also induces twisted tooth flanks on the generated work gear. In this paper, I propose a hobbing method by applying a modified work gear rotation angle that enables double-crowning of involute helical gear's tooth flanks using a standard hob cutter and a computer numerical control (CNC) hobbing machine with only three synchronous axes. The proposed method has also verified by using two computer simulation examples to compare the meshing-conditions, contact ellipses, and transmission errors of the double-crowned gear pairs with that produced by applying the conventional hobbing method. Computer simulation results reveal the advantages of the proposed novel hobbing method.

scholarly journals Influence de la charge sur la production et la croissance de la vigne (c.v. Merlot)

OENO One ◽  
1987 ◽  
Vol 21 (2) ◽  
pp. 81
Author(s):  
M. Nikov
Keyword(s):  
Leaf Area ◽  
Shoot Growth ◽  
Inhibitory Effect ◽  
Yield Ratio ◽  
Primary Factor ◽  
First Year ◽  
Parabolic Curve ◽  
Grape Quality ◽  
Single Shoot ◽  
The Relationship

<p style="text-align: justify;">L'étude est menée avec le cépage Merlot conduit en forme haute et à une distance de 3,40 x 1,20 m. Les vignes supportent des charges individuelles de 26, 32, 38 ... jusqu'à 62 bourgeons par cep. La relation entre le nombre d'yeux et le rendement par souche se caractérise par une courbe parabolique avec un maximum autour de 50 bourgeons par cep. L'augmentation de charge au-delà de l'optimum exerce une influence inhibitrice sur la croissance des rameaux individuels depuis la première année. Le rapport entre la surface foliaire et la production représente un facteur essentiel pour la qualité du raisin.</p><p style="text-align: justify;">+++</p><p style="text-align: justify;">The study involves Merlot variety trained with an high trunk and a 3,40 x 1,20 m spacing. The vines support individual pruning levels of 26, 32, 38 ... up to 62 buds/vine. The relationship between bud number and yield per vine is characterized by a parabolic curve with a maximum around 50 buds/vine. The increase in pruning level beyond the optimum induces an inhibitory effect on single shoot growth since the first year. The leaf area : yield ratio represents a primary factor of grape quality.</p>

Estimated Placental Volume and Gestational Age

2017 ◽  
Vol 35 (08) ◽  
pp. 748-757
Author(s):  
Kimberly Isakov ◽  
John Emerson ◽  
Katherine Campbell ◽  
France Galerneau ◽  
Amber Anders ◽  
...  
Keyword(s):  
Birth Weight ◽  
Confidence Interval ◽  
Clinical Utility ◽  
Screening Tool ◽  
Placental Pathology ◽  
Parabolic Curve ◽  
Microscopic Evaluation ◽  
The Relationship ◽  
Placental Volume ◽  
Best Fit

Objective The objective of this study was to validate estimated placental volume (EPV) across a range of gestational ages (GAs). Study Design Three hundred sixty-six patients from 2009 to 2011 received ultrasound scans between 11 + 0 and 38 + 6 weeks GA to assess EPV. An EPV versus GA best fit curve was generated and compared with published normative curves of EPV versus GA in a different population. A subanalysis was performed to explore the relationship between EPV and birth weight (BW). Results Analysis of EPV versus GA revealed a parabolic curve with the following best fit equation: EPV = (0.372 GA − 0.00364 GA2)3. EPV was weakly correlated with BW, and patients with an EPV in the bottom 50th percentile had 2.42 times the odds of having a newborn with a BW in the bottom 50th percentile (95% confidence interval: 1.27–4.68). Microscopic evaluation of two placentas corresponding to the smallest EPV outliers revealed significant placental pathology. Conclusion Placental volume increases throughout gestation and follows a predictable parabolic curve, in agreement with the existing literature. Further validation is required, but EPV may have the potential for clinical utility as a screening tool in a variety of settings.

Etude granulometrique de la fraction sableuse des alluvions de la crue de juin 1957 sur le Guil (Hautes-Alpes)

1959 ◽  
Vol S7-I (6) ◽  
pp. 614-624
Author(s):  
Jean Tricart
Keyword(s):  
Sand Fraction ◽  
Parabolic Curve ◽  
Mechanical Suspension

Abstract Two fundamental types of curves (S-shaped and parabolic) were obtained in a granulometric study of the sand fraction of material carried by the Guil (France) in the flood of 1957. The S-shaped curve corresponds to well-sorted alluvium which has been transported in mechanical suspension and in which pebbles and gravels are rare; the parabolic curve corresponds to material whose transport has been obstructed. The effect of local geomorphic conditions on sedimentation was marked even in this violent flood.

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