Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering: Recent submissions

Now showing items 901-920 of 1036

    • Article  

      Electronic structure of K 2Bi 8Se 13 

      Bilc, D. I.; Mahanti, S. D.; Kyratsi, Theodora; Chung, D. Y.; Kanatzidis, M. G.; Larson, P. (2005)
      K 2Bi 8Se 13 belongs to a class of complex chalcogenides that shows potential for superior thermoelectric performance. This compound forms in two distinct phases, α and β. The β phase, which has several sites with mixed ...
    • Article  

      Thickness dependence of Hall transport in Ni1.15Mn 0.85Sb thin films on silicon 

      Branford, W. R.; Clowes, S. K.; Bugoslavsky, Y. V.; Gardelis, S.; Androulakis, J.; Giapintzakis, John; Grigorescu, C. E. A.; Manea, S. A.; Freitas, R. S.; Roy, S. B.; Cohen, L. F. (2004)
      Highly spin polarized Heusler alloys, NiMnSb and Co2MnSi, attract a great deal of interest as potential spin injectors for spintronic applications. Spintronic devices require control of interfacial properties at the ...
    • Article  

      Electronic Structure of K2Bi8Se13 

      Bilc, Daniel; Larson, Paul; Mahanti, Subhendra; G, M. Kanatzidis (2002)
      K 2Bi8 Se13 belongs to a class of complex Bi-Te-Se systems which show great potential for thermoelectric performance. This compound forms in two distinct phases α-K 2Bi8 Se13 (triclinic with space group P-1) and β-K 2Bi8 ...
    • Article  

      Large positive magnetoresistance in nonstoichiometric NiMnSb thin films on silicon 

      Branford, W. R.; Clowes, S. K.; Syed, M. H.; Bugoslavsky, Y. V.; Gardelis, S.; Androulakis, J.; Giapintzakis, John; Grigorescu, C. E. A.; Berenov, A. V.; Roy, S. B.; Cohen, L. F. (2004)
      The transport properties of pulsed-laser-deposited NiMnSb films on silicon as a function of film thickness were discussed. It was found that a low-temperature upturn was observed in the resistivity for film thicknesses of ...
    • Conference Object  

      Transport properties of the doped thermoelectric material K2Bi8-xSbxSe13 

      Brazis, P. W.; Ireland, J. R.; Lane, M. A.; Kyratsi, Theodora; Chung, D. Y.; Kanatzidis, M. G.; Kannewurf, C. R. (Affiliation: Dept. of Electrical and Comp. Eng., Northwestern University, Evanston, IL 60208-3118, United StatesCorrespondence Address: Brazis, P.W.Dept. of Electrical and Comp. Eng., Northwestern University, Evanston, IL 60208-3118, United States, 2001)
      The synthesis, physicochemical, spectroscopic, and structural characterization of the compound β-K2Bi8Se13 has been previously reported. The results indicated that this material should be investigated further for possible ...
    • Article  

      Spin polarisation and anomalous Hall effect in NiMnSb films 

      Branford, W. R.; Roy, S. B.; Clowes, S. K.; Miyoshi, Y.; Bugoslavsky, Y. V.; Gardelis, S.; Giapintzakis, John; Cohen, L. F. (2004)
      NiMnSb has attracted a great deal of interest as a spin injector/detector in spintronic devices because it has a Curie temperature of 728 K and is predicted to be half-metallic (100% spin polarized). NiMnSb has been reported ...
    • Article  

      Vascular flow and perfusion imaging with ultrasound contrast agents 

      Bruce, M.; Averkiou, Michalakis A.; Tiemann, Klaus; Lohmaier, S. FAU; Powers, J. E.; Beach, K. (2004)
      Current techniques for imaging ultrasound (US) contrast agents (UCA) make no distinction between low-velocity microbubbles in the microcirculation and higher-velocity microbubbles in the larger vasculature. A combination ...
    • Conference Object  

      Electron microscopy study of thermoelectric (BixSb1-x)2Te3thin film 

      Breza, A.; Lioutas, C. B.; Giapintzakis, John (Springer Science and Business Media, LLC, 2015)
      In the present work, transmission electron microscopy (TEM) techniques were used in order to study the morphology and investigate the structural properties of a (BixSb1-x)2Te3(BST) thin film. The sample was fabricated on ...
    • Article  

      Scaling rules for diffusive drug delivery in tumor and normal tissues 

      Baish, J. W.; Stylianopoulos, T.; Lanning, R. M.; Kamoun, W. S.; Fukumura, D.; Munn, L. L.; Jain, R. K. (2011)
      Delivery of blood-borne molecules and nanoparticles from the vasculature to cells in the tissue differs dramatically between tumor and normal tissues due to differences in their vascular architectures. Here we show that ...
    • Article  

      Synthesis, characterization, and study of octanuclear iron-oxo clusters containing a redox-active Fe4O4-cubane core 

      Baran, P.; Boča, R.; Chakraborty, I.; Giapintzakis, John; Herchel, R.; Huang, Q.; McGrady, J. E.; Raptis, R. G.; Sanakis, Y.; Simopoulos, A. (2008)
      A one-pot synthetic procedure yields the octanuclear FeIII complexes Fe8(μ4-O)4(μ-pz*) 12X4, where X = Cl and pz* = pyrazolate anion (pz = C3H3N2-) (1), 4-Cl-pz (2), and 4-Me-pz (3) or X = Br and pz* = pz (4). The crystal ...
    • Article  

      Evaluating the microstructure and performance of nanocomposite PVD TiAlBN coatings 

      Baker, M. A.; Klose, S.; Rebholz, Claus; Leyland, A.; Matthews, A. (2002)
      Physical vapour deposition (PVD) TiAlBN coatings can exhibit excellent wear resistance, with optimised coating compositions demonstrating a 150% increase in lifetime compared to standard TiAlN coatings in wet-cutting drill ...
    • Conference Object  

      Numerical simulation of die filling in semisolid metal processing 

      Bardinet, F.; Alexandrou, Andreas N.; Loue, Willem (Affiliation: WPI, Worcester, United StatesCorrespondence Address: Bardinet, FrancoisWPI, Worcester, United States, 1997)
      Semisolid Metal Processing offers distinct advantages over other near-net-shape technologies, such as a more homogeneous microstructure, less porosity and thus excellent mechanical properties. A perfect control of die ...
    • Article  

      Electron spectroscopic studies of nanocomposite PVD TiAlBN coatings 

      Baker, M. A.; Rebholz, Claus; Leyland, A.; Matthews, A. (2002)
      A range of TiAlBN coatings have been deposited by electron beam evaporation and the optimised composition exhibits a 150% improvement over single phase TiAlN coatings in drilling tests. The coatings have been analysed by ...
    • Article  

      Stable finite element solutions of fully viscous compressible flows 

      Barsoum, M. E.; Alexandrou, Andreas N. (1995)
      This paper presents a stable approach to solve convection-dominated flows in the presence of compressibility effects. This approach employs the Petrov-Galerkin weighing to the FEM equations to achieve stability at the high ...
    • Article  

      A study of the nanostructure and hardness of electron beam evaporated TiAlBN Coatings 

      Baker, M. A.; Monclus, M. A.; Rebholz, Claus; Gibson, P. N.; Leyland, A.; Matthews, A. (2010)
      TiAlBN coatings have been deposited by electron beam (EB) evaporation from a single TiAlBN material source onto AISI 316 stainless steel substrates at a temperature of 450°C and substrate bias of −100V. The stoichiometry ...
    • Article  

      Improvement in Endocardial Border Delineation Using Tissue Harmonic Imaging 

      Becher, Harald; Tiemann, Klaus; Schlosser, Thomas; Pohl, Christoph; Nanda, Navin C.; Averkiou, Michalakis A.; POWERS, JEFF; Luderitz, Berndt (1998)
    • Article  

      Representing anisotropy of two-point second-order turbulence velocity correlations using structure tensors 

      Bhattacharya, A.; Kassinos, Stavros C.; Moser, R. D. (2008)
      A locally homogeneous representation for the two-point, second-order turbulent velocity fluctuation Rij(x,r) = 〈u′i(x)u′i(x+r)〉 is formulated in terms of three linearly independent structure tensors [Kassinos et al., J. ...
    • Article  

      Novel CeO2-based screen-printed potentiometric electrodes for pH monitoring 

      Betelu, S.; Polychronopoulou, K.; Rebholz, Claus; Ignatiadis, I. (2011)
      Nuclear waste repositories are being installed in deep excavated rock formations in some places in Europe to isolate and store radioactive waste. In France, the Callovo-Oxfordian formation (COx) is a possible candidate for ...
    • Article  

      Modeling of an electrohydraulic lithotripter with the KZK equation 

      Averkiou, Michalakis A.; Cleveland, Robin O. (1999)
      The acoustic pressure field of an electrohydraulic extracorporeal shock wave lithotripter is modeled with a nonlinear parabolic wave equation (the KZK equation). The model accounts for diffraction, nonlinearity, and ...
    • Article  

      Self-demodulation of amplitude- and frequency-modulated pulses in a thermoviscous fluid 

      Averkiou, Michalakis A.; Lee, Yang-Sub; Hamilton, Mark F. (1993)
      The self-demodulation of pulsed sound beams in a thermoviscous fluid is investigated experimentally and theoretically. Experiments were performed in glycerin at megahertz frequencies with amplitude- and frequency-modulated ...