Browsing Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering by Title

Now showing items 339-358 of 1036

    • Article  

      The Galling Behavior of Advanced Coating Contacts with Aluminium Alloy during Sliding Wear 

      Hu, Yi Ran; Gharbi, Mohammad M.; Liang, Vivian; Zheng, Yang; Politis, Denis J.; Wang, Li Liang (2018)
      This paper investigates the galling behaviour of a range of hard coatings applied to tooling surfaces during the sheet forming of an aluminium alloy workpiece. A total of three types of tooling materials were investigated, ...
    • Article  

      Gallium hydride vapor phase epitaxy of GaN nanowires 

      Zervos, Matthew; Othonos, A. (2011)
      Straight GaN nanowires (NWs) with diameters of 50 nm, lengths up to 10 μm and a hexagonal wurtzite crystal structure have been grown at 900°C on 0.5 nm Au/Si(001) via the reaction of Ga with NH3 and N2:H2, where the H2 ...
    • Article  

      A general framework for computing the turbulence structure tensors 

      Stylianou, F. S.; Pecnik, R.; Kassinos, Stavros C. (2015)
      Good measures of the turbulence structure are important for turbulence modeling, flow diagnostics and analysis. Structure information is complementary to the componentality anisotropy that the Reynolds stress tensor carries, ...
    • Article  

      Generating proper dynamic models for truck mobility and handling 

      Louca, Loucas S.; Rideout, D. G.; Stein, J. L.; Hulbert, G. M. (2004)
      The effectiveness and utility of an energy-based model reduction algorithm for two different vehicle system modeling applications are discussed. The first case study focuses on the vehicle dynamics model of a military ...
    • Article  

      A grid-free abstraction of the Navier-Stokes equations in Fortran 95/2003 

      Rouson, D. W. I.; Rosenberg, R.; Xu, X.; Moulitsas, I.; Kassinos, Stavros C. (2008)
      Computational complexity theory inspires a grid-free abstraction of the Navier-Stokes equations in Fortran 95/2003. A novel complexity analysis estimates that structured programming time grows at least quadratically with ...
    • Article  

      Growth and characterization of ceria thin films and Ce-doped γ - Al 2 O 3 nanowires using sol-gel techniques 

      Gravani, S.; Polychronopoulou, K.; Stolojan, V.; Cui, Q.; Gibson, P. N.; Hinder, S. J.; Gu, Z.; Doumanidis, C. C.; Baker, M. A.; Rebholz, Claus (2010)
      γ - Al 2 O 3 is a well known catalyst support. The addition of Ce to γ - Al 2 O 3 is known to beneficially retard the phase transformation of γ - Al 2 O 3 to α - Al 2 O 3 and stabilize the γ-pore structure. In this ...
    • Article  

      Growth and structural characterization of orthorhombic and tetragonal SrCuO2 thin films 

      Mihailescu, C. N.; Pasuk, I.; Athanasopoulos, G. I.; Luculescu, C.; Socol, M.; Saint-Martin, R.; Revcolevschi, A.; Giapintzakis, John (2013)
      Epitaxial SrCuO2 thin films were grown on (0 0 1) SrTiO 3 substrates by pulsed laser deposition using a stoichiometric target. X-ray diffraction indicated that the SrCuO2 films undergo a structural phase transition as a ...
    • Article  

      Growth and transport properties of HT-Li xCoO 2 thin films deposited by pulsed laser deposition 

      Svoukis, E.; Athanasopoulos, G. I.; Moradpour, A.; Schneegans, O.; Revcolevschi, A.; Giapintzakis, John (2012)
      The successful in situ growth of single phase, c-axis oriented, layered structured Li xCoO 2 thin films on (0 0 0 1) Al 2O 3 substrates by pulsed laser deposition is reported. Thin films were grown in an oxygen pressure ...
    • Article  

      Growth of polycrystalline LaNi 1-xCo xO 3 (x = 0.3, 0.5) thin films on Si(100) by pulsed laser deposition 

      Androulakis, J.; Klini, A.; Manousaki, A.; Violakis, G.; Giapintzakis, John (2004)
      Polycrystalline LaNi 1_xCo xO 3 (x = 0.5, 0.3) thin films have been deposited on polished Si(lOO) substrates by pulsed laser deposition. The films are grown at 650°C in ambient oxygen pressure of 0.4 mbar with an incident ...
    • Article  

      Hall effect above Tc in untwinned single-crystal YBa2Cu3O7-x: Normal-state behavior and superconducting fluctuations 

      Rice, J. P.; Giapintzakis, John; Ginsberg, D. M.; Mochel, J. M. (1991)
      We present a measurement of the Hall coefficient RH for an untwinned single crystal of YBa2Cu3O7-x. The crystal was produced by a method that does not involve thermomechanical detwinning, and has a resistivity along the ...
    • Article  

      Hall effect in an untwinned single crystal of YBa2Cu3O7-x 

      Rice, J. P.; Giapintzakis, John; Ginsberg, D. M.; Mochel, J. M. (1991)
      The Hall coefficient RH for untwinned single-crystal YBa2Cu3O7-x has been measured for the first time. The crystal was produced by a technique not requiring the application of stress. The measurements are made above the ...
    • Article  

      Hall effect in detwinned single crystals of YBa2(Cu1-xZnx)3O7-δ in the mixed state 

      Schegolev, A. I.; Giapintzakis, John; Manson, J. T.; Ginsberg, D. M.; Dumler, I. (1996)
      The effect of zinc doping on the mixed-state Hall effect in detwinned single crystals of YBa2Cu3O7-δ has been studied. We observe a sign reveral of the Hall effect in crystals with a superconducting transition temperature ...
    • Article  

      Hall effect in the mixed stat detwinned single crystals 

      Manson, J.; Giapintzakis, John; Schegolev, A.; Ginsberg, D. (1996)
      We have measured the Hall and longitudinal resistivities of detwinned (Formula presented)(Formula presented)(Formula presented)(Formula presented)(Formula presented) single crystals with x=0.05, 0.10, 0.15, and 0.20. In ...
    • Article  

      Hall effect study of magnetoresistive perovskite LaNi0.5Co 0.5O3 thin films 

      Androulakis, J.; Giapintzakis, John (2004)
      We report on the Hall effect of LaNi0.5Co0.5O 3 magnetoresistive thin films grown on Si(100) substrates by pulsed laser deposition. The Hall resistivity exhibits sign reversals both in varying magnetic field and temperature, ...
    • Book Chapter  

      Handbook of Energy Efficiency in Buildings: A lifecycle approach 

      Asdrubali, Francesco; Desideri, Umberto; Aelenei, Daniel; Agathokleous, Rafaela; Balaras, Constantinos; Bardinelli, Giorgio; Ballarini, Ilaria; Berardi, Umberto; Bertoldi, Paolo; Bianchi, Francesco; Bisegna, Fabio; Burattini, Chiara; Cabeza, Luisa; Castellani, Beatrice; Cecere, Carlo; Cellura, Maurizio; Cho, Heejin; Coch, Helena; Conti, Paolo; Corrado, Vincenzo; Curra, Edoardo; D' Alessandro, Francesco; Dascalaki, Elena; Santoli, Livio; Dong, Chuanshauai; Evangelisti, Luca; Fabrizio, Enrico (Elsevier, 2018-06-28)
    • Conference Object  

      Hardware acceleration of n-body simulations for galactic dynamics 

      Cook, Todd A.; Kim, Hong-Ryul; Louca, Loucas S. (Affiliation: Rutgers Univ., Piscataway, NJ, USA, United StatesCorrespondence Address: Cook, Todd A.Rutgers Univ., Piscataway, NJ, USAUnited States, 1995)
      N-body methods are used to simulate the evolution and interaction of galaxies. These simulations are usually run on large-scale supercomputers or on very expensive full-custom hardare. This paper presents an alternative ...
    • Conference Object  

      Harmonic Generation in Tissue with Matrix Arrays for 4D Cardiac THI 

      Lai, Ting-Yu; Kou, Sitai; Bruce, Matthew; Loupas, Thanasis; Averkiou, Michalakis A. (2019)
      Combining 4D echocardiography and tissue harmonic imaging (THI) may improve image quality and consequently diagnosis of heart disease. Beamforming considerations such as methodology for sampling the volume with ultrasound ...
    • Article  

      Harmonic generation with a dual frequency pulse 

      Keravnou, Christina P.; AVERKIOU, MICHALAKIS A. (2014)
      Nonlinear imaging was implemented in commercial ultrasound systems over the last 15 years offering major advantages in many clinical applications. In this work, pulsing schemes coupled with a dual frequency pulse are ...
    • Article  

      Harmonic generation with a dual frequency pulse 

      Keravnou, Christina P.; AVERKIOU, MICHALAKIS A. (2013)
      Nonlinear imaging was utilized in commercial ultrasound systems over the last 15 years offering major advantages in many clinical applications. In this work, pulsing schemes (pulse inversion, power modulated pulse inversion ...
    • Article  

      Heat channeling in extremely thin silicon-on-insulator devices: A simulation study 

      Orfanidou, C. M.; Giapintzakis, John (2013)
      Silicon-on-insulator (SoI) devices are particularly interesting for thermal management studies as they suffer from severe self-heating because of the very low and isotropic thermal conductivity of silicon dioxide that is ...