Now showing items 1-10 of 1430
Effect of fiber orientation on the shear behavior of glass fiber/epoxy composites
(Materials & Design, 2015-01-01) [Artigo]
This paper deals with the study of the influence of the lay-up configuration on interlaminar and in-plane shear properties of glass fiber reinforced epoxy composites. The following laminates were produced by resin transfer ...
Third body perturbation using a single averaged model considering elliptic orbits for the disturbing body
(Spaceflight Mechanics 2008, Vol 130, Pts 1 and 2, 2008-01-01) [Trabalho apresentado em evento]
In the present work, we expanded the study done by Solorzanol(1) including the eccentricity of the perturbing body. The assumptions used to develop the single-averaged analytical model are the same ones of the restricted ...
STABILITY IN THE DOUBLE-RESONANCE PROBLEM
(Celestial Mechanics, 1985-01-01) [Artigo]
A preliminary physicochemical, exergetic and economic study of hydrogen production utilizing glycerol
(AIChE 100 - 2008 AIChE Annual Meeting, Conference Proceedings, 2008-12-01) [Trabalho apresentado em evento]
This work has as objective to demonstrate technical and economic viability of hydrogen production utilizing glycerol. The volume of this substance, which was initially produced by synthetic ways (from oil-derived products), ...
Effective gravitational equations for f(R) braneworld models
(Physical Review D: Particles, Fields, Gravitation and Cosmology, 2013-05-31) [Artigo]
The viability of achieving gravitational consistent braneworld models in the framework of a f(R) theory of gravity is investigated. After a careful generalization of the usual junction conditions encompassing the embedding ...
Fatigue apparatus for geometrically complex non-standardized specimens
(Recent Patents on Mechanical Engineering, 2009-01-01) [Artigo]
Standard Test Methods (e.g. ASTM, DIN) for materials characterization in general, and for fatigue in particular, do not contemplate specimens with complex geometries, as well as the combination of axial and in-plane bending ...
A linearly tunable low-voltage CMOS transconductor with improved common-mode stability and its application to (gm)-C filters
(IEEE Transactions on Circuits and Systems Ii-analog and Digital Signal Processing, 2001-07-01) [Artigo]
A linearly tunable low-voltage CMOS transconductor featuring a new adaptative-bias mechanism that considerably improves the stability of the processed-signal common,mode voltage over the tuning range, critical for very-low ...
Optimal impulsive control in a powered Swing-By
(AIAA Guidance, Navigation, and Control (GNC) Conference, 2013-09-16) [Trabalho apresentado em evento]
This paper studies the problem of applying an impulsive control in a spacecraft that is performing a Swing-By maneuver. The objective is to study the changes in velocity, energy and angular momentum for this maneuver as a ...
The effect of N+ ion energy on the properties of ion bombarded plasma polymer films
(Nuclear Instruments & Methods In Physics Research Section B-beam Interactions With Materials and Atoms, 2001-04-01) [Artigo]
This work describes the influence of the ion bombardment on the electrical, optical and mechanical properties of polymer films deposited from radio-frequency plasmas of benzene. Irradiations were conducted using N+ at 5 x ...
Comment on 'Relativistic extension of shape-invariant potentials'
(Journal of Physics A: Mathematical and General, 2002-07-26) [Carta]
This comment criticizes the recently published approach of Alhaidari for solving relativistic problems. It is shown that his gauge considerations are inaccurate and that the class of exactly solvable relativistic problems ...