Browsing Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering by Title
Now showing items 218-237 of 1036
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Article
Effect of Bi-doping and Mg-excess on the thermoelectric properties of Mg2Si materials
(2014)In this work, Bi-doped magnesium silicide compounds were prepared by applying a combination of both, short-time ball milling and heating treatment. The effect of Mg excess was also studied, aiming towards further improvement ...
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Article
The effect of boron additions on the tribological behaviour of TiN coatings produced by electron-beam evaporative PVD
(1999)TiN coatings containing small amounts of boron were synthesized by electron beam evaporating a Ti-B alloy material from a single crucible source into a plasma comprising Ar or an Ar/N2 mixture at a substrate temperature ...
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Article
The effect of correlated and point defects on the vortex lattice melting transition in single-crystal YBa2Cu3O7-δ
(1994)The vortex melting transition Tm in several untwinned and twinned crystals is measured resistively in fields up to 8T. A Lindemann criterion for vortex lattice melting is obtained in addition to a sharp hysteresis in the ...
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Article
Effect of Cu Content on the Structure, and Performance of Substoichiometric Cr-N Coatings [electronic resource]
(2010)Cu-Cr-N coatings with Cu contents between 3 and 65 at.%, Cu/Cr ratios in the 0.04-4.5 range and 21-27 at.% N, synthesized by twin electron-beam Physical Vapor Deposition at 450 ℗'C, were investigated and compared against ...
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Conference Object
Effect of Cu content on the tribological performance of Cr-N coatings at high temperatures (840°C)
(Affiliation: Department of Mechanical and Manufacturing Eng., University of Cyprus, Nicosia, CyprusAffiliation: Department of Mechanical Science and Eng., University of Illinois at Urbana-Champaign, Urbana, IL, United StatesAffiliation: Institute for Health and Consumer Protection, Joint Res. Centre of the European Commission, Ispra (VA), ItalyCorrespondence Address: Polychronopoulou, K.Department of Mechanical and Manufacturing Eng., University of Cyprus, Nicosia, Cyprus, 2010)Cr-N and Cu-Cr-N coatings with Cu content between 3-65 at.%, Cu/Cr ratios in the 0.04-4.5 range and 21-27 at.% N, synthesized by twin e-beam Physical Vapor Deposition (EBPVD) at 450°C, were investigated. Using X-ray ...
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Conference Object
The Effect of Flow Rate and Electrostatic Charge on Aerosol Deposition in a Realistic Lung Geometry
(Springer International Publishing, 2018)To be able to predict the fate of therapeutic or pollutant xenobiotic inhaled particles in the human lungs, we need to understand the nature of airflow as it occurs throughout the entire respiratory tract.
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Article
The effect of flow rate and electrostatic charge on aerosol deposition in a realistic lung geometry
(2018)To be able to predict the fate of therapeutic or pollutant xenobiotic inhaled particles in the human lungs, we need to understand the nature of airflow as it occurs throughout the entire respiratory tract. © 2018, Springer ...
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Conference Object
The effect of flow rate, head position, and inhaler orientation on the airflow and particle deposition in an mri-based mouth-throat geometry
(International Symposium on Turbulence and Shear Flow Phenomena, TSFP10, 2017)The mouth-throat plays a key role in the administration of inhaled medicines. It is an area of intense filtration, where an unacceptably high fraction of the released drug dose is deposited and thus wasted. Due to the ...
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Article
The Effect of Ge on Mg2Si0.6−x Sn0.4Ge x Materials
(2014)In this work, we investigate the influence of the introduction of Ge on the thermoelectric properties of Bi-doped quaternary Mg2Si0.6−x Sn0.4Ge x alloys. Mg2Si0.58−x Sn0.4Bi0.02Ge x materials were fabricated by a low ...
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Article
Effect of gold and silver nanoislands on the electrochemical properties of carbon nanofoam
(2013)•Metallic nanoislands coated on the exterior surface of carbon nanofoam.•Their properties are dependent on the type of the metallic nanoisland.•The gold-associated redox reactions enhance their electrochemical performance.
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Article
Effect of hydrodynamic forces on sandy sediments in oscillatory boundary layer flow
(2019)In the present work, the forces exerted on spherical sand particles by oscillatory boundary layer flows at Re=25,000 and Re=55,000 are examined by means of Large Eddy Simulations. The particles move within the carrier fluid ...
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Article
Effect of inhomogeneities on the fluctuation-induced cusp in the specific heat of high temperature superconductors
(1989)We consider the effect of inhomogeneities on the electronic specific heat in high temperature superconductors. We find that a modest spread in the transition temperature of the sample can significantly alter the detailed ...
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Conference Object
Effect of links’ center of gravity position on the performance of a four-bar linkage as an upper limb rehabilitation mechanism: A parametric study
(Springer Verlag, 2016)It has been shown that mechanisms based on closed kinematic chains, with integrated passive elements (springs) can generate motions that replicate the natural hand motion and therefore they can be potentially useful in ...
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Article
Effect of microstructure on the thermoelectric performance of La1−xSrxCoO3
(2016)We present a case where the microstructure has a profound effect on the thermoelectric properties of oxide compounds. Specifically, we have investigated the effect of different sintering treatments on La1−xSrxCoO3 samples ...
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Article
Effect of porosities on tensile properties of laser-welded Al-Li alloy: an experimental and modelling study
(2018)Aluminium–lithium (Al-Li) alloys are very attractive for aerospace applications due to their outstanding properties, such as high specific strength, high rigidity and good resistance to corrosion and fatigue, compared to ...
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Article
Effect of silicon nitride/oxide on the structure and the thermal conductivity of CoSi nanocomposites
(2017)In this work, the fabrication of nanocomposites with silicon nitride/oxide into the thermoelectric matrix of cobalt silicide is presented. The different concentrations of nano-Si3N4 were intentionally introduced by mechanical ...
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Article
Effect of sintering in ball-milled K 2Bi 8Se 13 thermoelectric nano-composites
(2012)K 2Bi 8Se 13 has many attractive features for thermoelectric applications. Recently, K 2Bi 8Se 13-based nanocomposite materials, consisting of nano-crystalline, micro-crystalline and amorphous phases, have been fabricated ...
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Article
The effect of the phase of transmission on contrast agent echoes
(1998)Ultrasound contrast agents consist of a gas bubble, encapsulated by a shell for stabilization. The shell dampens the fluctuations in the bubble radius when insonified. The detection of contrast microbubbles during a medical ...
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Article
The effect of the phase of transmission on contrast agent..
(1998)Presents an experimental study which examined the effect of the phase of sonification signal on the ultrasound contrast agent by the bubble echo. Experimental methods
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Conference Object
Effect of turbulent pulsating flow around a near-wall submerged cylinder on the potential motion of bed and suspended loads
(International Society of Offshore and Polar Engineers, 2016)In the present work, the pulsating flow around a submerged cylinder close to the impermeable seabed is examined by means of Large Eddy Simulations (LES). A Reynolds number equal to Re = 5000 is considered, based on the ...