Browsing by Subject "SURFACE"
Now showing items 1-20 of 31
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ADVANCES IN MICRO-MANUFACTURING APPLYING TRIBOLOGICAL PRINCIPLES
(2010)Micro-manufacturing is a cover term for manufacturing processes applied to products possessing micro- and nano-scopic features. Due to the scaling of surface phenomena, the tribological aspects of such processes are much ... -
Applicability of an empirical runoff estimation method in central Greece
(2007)In order to assess the water runoff on the sloping cultivated fields of Central Greece, an experiment was carried out from 1997 to 2000. The following treatments were used: three tillage methods, viz. conventional tillage, ... -
Changes in heart rate variability during the induction and decay of heat acclimation
(2014)We evaluated the changes in core temperature, heart rate, and heart rate variability (HRV) during the induction and decay of heat acclimation. Ten males (23 +/- A 3 years; 79.5 +/- A 3.5 kg; 15.2 +/- A 4.5 percent body ... -
Computer aided analysis of viscous film flow along an inclined wavy wall
(1999)The steady, laminar flow of a Newtonian liquid along an inclined wavy wall is studied in a two-dimensional numerical experiment using the Galerkin finite element method. The dimensionless Navier-Stokes equations are solved ... -
Constitutive Model for Cyclic Response of Structural Steels with Yield Plateau
(2011)A rate-independent cyclic plasticity model for structural steels with a yield plateau is proposed. The model couples nonlinear kinematic hardening with a memory surface in the plastic strain space, to account for the ... -
Decomposition of NH3 on Pd and Ir - Comparison with Pt and Rh
(1997)The unimolecular decompositions of NH3 on polycrystalline wires and foils of Pd and Ir are examined and compared with the corresponding ones on Pt and Ph. The reactions were carried out in a differential flow reactor, at ... -
Evaluating the real profile length in turning of carbon steels
(2003)The real profile length constitutes a hybrid parameter in surface metrology which is rather neglected in literature, albeit it affects or controls sometimes surface functional properties like corrosion resistance, adhesibility, ... -
Experimental evidence for a short-wave global mode in film flow along periodic corrugations
(2013)The primary instability of liquid film flow along periodically corrugated substrates is studied experimentally. Two different wall shapes, of the same wavelength and height, are tested for a wide range of inclinations. It ... -
Experimental study of inclined film flow along periodic corrugations: The effect of wall steepness
(2006)Gravity-driven film flow along an inclined periodic wall with transverse rectangular corrugations is studied experimentally. The effect of corrugation steepness (=height/length) is considered in detail and an interesting ... -
Experiments on laminar film flow along a periodic wall
(2002)Experimental results are reported on the structure of gravity-driven film flow along an inclined periodic wall with rectangular corrugations. A fluorescence imaging method is used to capture the evolution of film height ... -
A fractional Brownian motion model for time series produced by constant temperature molecular dynamics simulations
(2002)In the present work we performed an analysis of time series of instantaneous temperature and pressure produced during constant temperature molecular dynamics. Simulations were applied to a nickel oxide grain boundary for ... -
Indentation of plastically graded substrates by sharp indentors
(2002)The present paper investigates the indentation of plastically graded substrates by sharp indentors. Contact analysis of plastically graded surfaces can be particularly useful in the design of load-bearing devices such as ... -
Induction of the acrosome reaction in bull spermatozoa with plasmin
(2003)Proteolytic enzymes appear to have an essential role in multiple phases of mammalian fertilization. Plasmin, the active enzyme of the plasminogen activation system that stimulates fibrinolysis and proteolysis has a less ... -
Laminar film flow along a periodic wall
(2000)Laminar, gravity-driven flow of a liquid down an inclined wall with large-amplitude sinusoidal corrugations is studied numerically by a spectral spatial discretization method. The synchronous resonance between the wall and ... -
Laminar film flow down a wavy incline
(1997)Laminar how of a liquid, down an inclined wall with sinusoidal corrugations, is considered. A linear analysis, valid for small-amplitude disturbances but arbitrary wavelength and Re number, leads to an Orr-Sommerfeld type ... -
Laser-beam carburizing of low-alloy steels
(2001)The present study investigated the use of a laser-beam, in order to carburize the surface of DIN 15CrNi6 low-alloy, case-hardening steel. The surface of the material was coated with graphite prior to laser irradiation. Two ... -
Molecular dynamics simulation study of Ni2+ adatom diffusion on the NiO (001) surface
(2001)Using molecular dynamics simulations we studied the cation adatom diffusion on the NiO(001) surface. We found that there are two equilibrium adatom positions: one over an oxygen ion, that is raised by as much as 30% at ... -
Natural convection in rectangular tanks heated locally from below
(2004)The present study was undertaken in order to gain understanding of certain aspects of natural convection in a glass-melting tank heated locally from below. Based on numerical predictions, the effects of Rayleigh number, ... -
Noise spectra of K+ and NH4+ ions at over-limiting current in an electrochemical system with a cation exchange membrane
(2013)The present work investigates the effect of the counter ion nature on the noise of the over-limiting current (Iov). Moreover, the electrochemical methods, current voltage curve (I-V) and the chronopotentiometry (V-t) ... -
Nonlinear dynamics of inclined films under low-frequency forcing
(2004)The evolution of an inclined liquid film, subjected to regular inlet disturbances of small frequency, f, is studied experimentally and computationally. The fluorescence imaging method is used to quantitatively document ...