Curvature Radius
Mostrando 1-12 de 67 artigos, teses e dissertações.
-
1. Corneal differences between healthy and subclinical patients assessed using two diferente corneal tomographers
RESUMO Objetivo: Analisar os índices subclínicos de to pografia de ceratocone utilizando as medidas feitas com Pentacam e com Orbscan-II para identificar evidências para a busca de índices sensíveis para triagem e diagnóstico de ceratocone subclínico. Métodos: Cinquenta participantes saudáveis (50 olhos) e 40 pacientes com ceratocone subclínico (
Arq. Bras. Oftalmol.. Publicado em: 25/11/2019
-
2. Cyclic fatigue resistance of novel Genius and Edgefile nickel-titanium reciprocating instruments
Abstract: This study aimed to assess the cyclic fatigue resistance of Genius and EdgeFile X1 reciprocating instruments compared with WaveOne Gold Primary. Twenty Genius (Ultradent) 25.04, 20 Genius 30.04, 20 EdgeFile X1 (EdgeEndo) and 20 WaveOne Gold Primary (Dentsply Maillefer) instruments were included in this study and tested in a static cyclic fatigue te
Braz. oral res.. Publicado em: 11/04/2019
-
3. Seismic Evaluation of Horizontally Curved Bridges Subjected to Near-Field Ground Motions
Abstract Horizontally curved bridges have more complex seismic behavior than straight bridges and have been more vulnerable to earthquakes. The present study aimed to evaluate the seismic response of concrete bridges with straight and arched box girder decks in isolated and non-isolated states. The results indicated that increasing the curvature of the non-i
Lat. Am. j. solids struct.. Publicado em: 14/03/2019
-
4. Relationship between the biomechanical properties of the cornea and anterior segment measurements
OBJECTIVE: To evaluate the relationship of biomechanical properties, corneal hysteresis and corneal resistance factor with age, sex and various corneal parameters measured with a Pentacam in normal subjects. METHODS: A total of 226 eyes from 113 patients were enrolled in this study. The subjects underwent Ocular Response Analyzer and Pentacam evaluations.
Clinics. Publicado em: 21/09/2018
-
5. A smartphone-based apple yield estimation application using imaging features and the ANN method in mature period
ABSTRACT: Apple yield estimation using a smartphone with image processing technology offers advantages such as low cost, quick access and simple operation. This article proposes distribution framework consisting of the acquisition of fruit tree images, yield prediction in smarphone client, data processing and model calculation in server client for estimating
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-08
-
6. Effect of Convergent Section Contour on the Sonic Line in Rocket Engine Nozzles
ABSTRACT This study made a numeric evaluation of the effect of convergent geometry on the position and profile of the sonic line in rocket engine nozzles. To validate the numerical solution, two conical nozzles, from which experimental results are available in the literature, were used as reference. The tested convergent geometries have the same values for t
J. Aerosp. Technol. Manag.. Publicado em: 16/07/2018
-
7. DEFORMATION OF PEACHES SUBMITTED TO CYCLIC LOADING USING THE DISCRETE ELEMENT METHOD
ABSTRACT This study aimed to use and validate a simple contact force model that describes the behavior of peaches stored in a wooden box, loaded cyclically, by using the discrete element method. The Kelvin-Voigt contact force model was used and the cyclic loading in the simulation was performed with an amplitude of 1 mm and frequency of 12 Hz for time interv
Eng. Agríc.. Publicado em: 2018-06
-
8. Analysis of the Propagation Properties of 90°-bend Periodic Segmented Waveguides Using the 2D Finite Element Method
Abstract We use the two dimensional finite element method (2D-FEM) in the frequency domain to characterize the transmission properties of 90°-bend periodic segmented waveguides (PSWs). We investigated the dependence of the transmission coefficient and the mode profile of PSWs on the bending radius, the waveguide duty cycle, and the operating wavelength. We
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2018-03
-
9. Mathematical Modeling And Numerical Simulation of Dropwise Condensation on an Inclined Circular Tube
ABSTRACT: Dropwise condensation can improve heat transfer process and, consequently, leads to considerable reduction in size and weight of condensers as well as improvement in the dehumidification process in many applications, especially in civil transport aircraft. It can also be used as an efficient cooling tool for electronics and electrical systems in ai
J. Aerosp. Technol. Manag.. Publicado em: 2017-12
-
10. Optimum Design of Effective Parameters for Orthotropic Plates with Polygonal Cut-Out
Abstract This paper investigates the effect of different parameters on stress analysis of infinite orthotropic plates with central polygonal cutout using gray wolf optimization algorithm. The important features of gray wolf algorithm include flexibility, simplicity, short solution time and ability to avoid local optimums. The effective parameters on stress d
Lat. Am. j. solids struct.. Publicado em: 2017-06
-
11. An Explicit Stiffness Matrix for Parabolic Beam Element
Abstract This study is devoted to strain-based formulation for a curved beam. Arches with parabolic geometry, which have a variety of applications, belong to this structural type. Dependency of the curvature radius to the arch length creates some complexities in the solution process. To analyze these complex structures, a two-node beam with six degrees of fr
Lat. Am. j. solids struct.. Publicado em: 2016-09
-
12. The Response of Clamped Shallow Sandwich Arches with Metallic Foam Cores to Projectile Impact Loading
Abstract The dynamic response and energy absorption capabilities of clamped shallow sandwich arches with aluminum foam core were numerically investigated by impacting the arches at mid-span with metallic foam projectiles. The typical deformation modes, deflection response, and core compression of sandwich arches obtained from the tests were used to validate
Lat. Am. j. solids struct.. Publicado em: 2015-12