• Article  

      Three-Dimensional Modelling of Concentration Fluctuations in Complicated Geometry 

      Andronopoulos, S.; Grigoriadis, D. G. E.; Robins, A.; Venetsanos, A.; Rafailidis, S.; Bartzis, J. G. (2001)
      The strong fluctuating component in the measured concentration time series of a dispersing gaseous pollutant in the atmospheric boundary layer, and the hazard level associated to short-term concentration levels, demonstrate ...
    • Article  

      Three-dimensional numerical simulations of magnetohydrodynamic flow around a confined circular cylinder under low, moderate, and strong magnetic fields 

      Kanaris, N.; Albets, X.; Grigoriadis, D. G. E.; Kassinos, Stavros C. (2013)
      This paper presents three-dimensional direct numerical simulations of liquid metal flow around a circular cylinder placed symmetrically in a rectangular duct, under a wide range of magnetic field intensities. Results are ...
    • Conference Object  

      Time-dependent rheology of semisolid metal suspensions 

      Burgos, Gilmer R.; Alexandrou, Andreas N.; Entov, Vladimir (Affiliation: Metals Processing Inst, Worcester, United StatesCorrespondence Address: Burgos, Gilmer R.Metals Processing Inst, Worcester, United States, 1999)
      Understanding the time-dependent flow behavior of semisolid materials (SSM) is essential for the simulation of semisolid processes. During processing, the structure of the material changes with the processing history due ...
    • Article  

      Tin oxide nanowires: The influence of trap states on ultrafast carrier relaxation 

      Othonos, A.; Zervos, Matthew; Tsokkou, D. (2009)
      We have studied the optical properties and carrier dynamics in SnO 2 nanowires (NWs) with an average radius of 50 nm that were grown via the vapor-liquid solid method. Transient differential absorption measurements have ...
    • Article  

      Tissue harmonic ultrasonic imaging 

      Averkiou, Michalakis A. (2001)
      Harmonic imaging was originally developed for microbubble contrast agents in the early 90s under the assumption that tissue is linear and all harmonic echoes are generated by the bubbles. In fact, tissue, like bubbles, is ...
    • Article  

      Towards Optimal Design of Cancer Nanomedicines: Multi-stage Nanoparticles for the Treatment of Solid Tumors 

      Stylianopoulos, T.; Economides, E. A.; Baish, J. W.; Fukumura, D.; Jain, R. K. (2015)
      Conventional drug delivery systems for solid tumors are composed of a nano-carrier that releases its therapeutic load. These two-stage nanoparticles utilize the enhanced permeability and retention (EPR) effect to enable ...
    • Article  

      Tranilast-induced stress alleviation in solid tumors improves the efficacy of chemo- and nanotherapeutics in a size-independent manner 

      Papageorgis, P.; Polydorou, C.; Mpekris, F.; Voutouri, C.; Agathokleous, E.; Kapnissi-Christodoulou, C. P.; Stylianopoulos, T. (2017)
      Accumulation of mechanical stresses during cancer progression can induce blood and lymphatic vessel compression, creating hypo-perfusion, hypoxia and interstitial hypertension which decrease the efficacy of chemo- and ...
    • Article  

      Transforming growth factor-β modulates pancreatic cancer associated fibroblasts cell shape, stiffness and invasion 

      Stylianou, A.; Gkretsi, V.; Stylianopoulos, T. (2018)
      Background: Tumor microenvironment consists of the extracellular matrix (ECM), stromal cells, such as fibroblasts (FBs) and cancer associated fibroblasts (CAFs), and a myriad of soluble factors. In many tumor types, including ...
    • Conference Object  

      Transient flow characteristics and properties of semi-solid aluminum alloy A356 

      Tonmukayakul, N.; Pan, Q. Y.; Alexandrou, Andreas N.; Apelian, D. (Affiliation: Advance Casting Research Center, Metal Processing Institute, WPI, Worcester, MA 01609, United StatesAffiliation: Department of Mechanical and Industrial Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, CyprusCorrespondence Address: Tonmukayakul, N.Advance Casting Research Center, Metal Processing Institute, WPI, Worcester, MA 01609, United States, 2004)
      Development of numerical models to simulate flow characteristics of semi-solid metals in the die cavity requires a good understanding of the transient and equilibrium flow properties of semi-solids and knowledge of the ...
    • Article  

      Transient planar squeeze flow of semi-concentrated fiber suspensions using the Dinh-Armstrong model 

      Alexandrou, Andreas N.; Mitsoulis, E. (2007)
      Numerical simulations are undertaken for the transient squeeze flow between parallel plates under a constant load. The conservation equations are solved via the finite element method in space and the Crank-Nicolson method ...
    • Article  

      Transition temperature and irreversibility line of cobalt-doped single-crystal YBa2Cu3O7-: The effect of high-pressure oxygen annealing 

      Neiman, R. L.; Giapintzakis, John; Ginsberg, D. M. (1994)
      We have measured the effect of cobalt on the superconducting transition temperature (Tc) and the dc irreversibility line (IRL) of single-crystal YBa2Cu3O7- (YBCO). Tc of a single crystal annealed in flowing oxygen at ...
    • Article  

      The transport of a passive scalar in magnetohydrodynamic turbulence subjected to mean shear and frame rotation 

      Kassinos, Stavros C.; Knaepen, B.; Carati, D. (2007)
      We consider the transport of a passive scalar under the influence of homogeneous turbulence in a conducting fluid that is exposed to a uniform external magnetic field while being sheared in fixed and rotating frames. The ...
    • Article  

      Transport of ellipsoid fibers in oscillatory shear flows: Implications for aerosol deposition in deep airways 

      Shachar-Berman, L.; Ostrovski, Y.; Rosis, A. De; Kassinos, Stavros C.; Sznitman, J. (2018)
      It is widely acknowledged that inhaled fibers, e.g. air pollutants and anthropogenic particulate matter, hold the ability to deposit deep into the lungs reaching the distal pulmonary acinar airways as a result of their ...
    • 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 ...
    • Conference Object  

      Tribological behavior of CrN and Al-Cr-N coatings 

      Demas, N. G.; Polycarpou, A. A.; Polychronopoulou, K.; Rebholz, Claus (Affiliation: Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United StatesAffiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, 1678, Nicosia, CyprusCorrespondence Address: Demas, N. G.Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States, 2009)
      The tribological behavior of CrN and Al-Cr-N coatings prepared by twin electron-beam evaporation at 450°C was investigated. The composition, structure, mechanical and tribological properties of the coatings were determined ...
    • Article  

      Tribological properties of twin electron-beam evaporated Cr-N and Al-Cr-N coatings under laboratory sliding and drill experiments 

      Polychronopoulou, K.; Demas, N. G.; Rebholz, Claus; Polycarpou, A. A. (2008)
      The tribological behavior of substoichiometric Cr-N and Al-Cr-N coatings prepared by twin electron-beam evaporation at 450°C was studied. Al-Cr-N coatings with Al to Cr ratios in the range of 1-8 (and nitrogen concentrations ...
    • Article  

      Tunneling in Pb-YBCO junctions: Determining the symmetry of the pairing state 

      Wollman, D. A.; Harlingen, D. J. Van; Giapintzakis, John; Ginsberg, D. M. (1995)
      We report on our efforts to understand the origin of supercurrent observed in c-axis tunnel junctions on YBCO [Sun A. G. et al., Phys. Rev. Lett. 72, 2267 (1994).] by studying the phase coherence of a-axis/c-axis and ...
    • Article  

      A two-dimensional numerical study of the stick-slip extrusion instability 

      Taliadorou, E.; Georgiou, G. C.; Alexandrou, Andreas N. (2007)
      The time-dependent, compressible extrusion of a Carreau fluid is solved over the reservoir-die-extrudate region using finite elements in space and a fully implicit scheme in time. A nonmonotonic slip law based on experimental ...
    • Conference Object  

      A two-phase fluid model of crystal settling under variable gravity 

      Alexandrou, Andreas N.; Shi, H.; Gatsonis, N. A.; Jr, A. Sacco (American Institute of Aeronautics and Astronautics Inc, AIAA, 1999)
      A two-phase fluid model of crystal particle motion in a liquid is presented. The model includes a liquid and a solid phase as continua and forces due to pressure, viscous stresses, variable gravity and fluid drag. The model ...
    • Conference Object  

      Two-phase model for processing materials in semisolid state 

      Alexandrou, Andreas N.; Burgos, Gilmer R.; Entov, Vladimir (Affiliation: Worcester Polytechnic Inst, Worcester, United StatesCorrespondence Address: Alexandrou, Andreas N.Worcester Polytechnic Inst, Worcester, United States, 1998)
      The importance of processing of metal and metal matrix composites in semisolid state is increasing quite rapidly due to the distinct advantages it offers over similar methods of near-net-shape making. In this investigation ...