Browsing Department of Physics & Materials Science by Title

Now showing items 154-158 of 158

    • Ultracold Atom-Ion Systems in Hybrid Traps 

      Onyango Stephen Okeyo (Humboldt-Universität zu Berlin, 2017-11-21)
      This thesis deals with the theoretical description of a hybrid system of an ultracold neutral atom and a single ion. These hybrid atom-ion systems combine the key advantages of ultracold neutral atoms and ions. In particular, ...

    • Ultracold Atom-Ion Systems in Hybrid Traps 

      Onyango Stephen Okeyo (Humboldt-Universität zu Berlin, 2017-11-21)
      This thesis deals with the theoretical description of a hybrid system of an ultracold neutral atom and a single ion. These hybrid atom-ion systems have attracted significant interest in recent years. They combine the key ...

    • Ultrasonic propagation in fractal porous material having rigid frame 

      Fellah, Zine El Abiddine; Bouchendouka, Abdellah; Penelope, Martin; Marchand, Lou; Ongwen, Nicholas O; Ogam, Erick; Li, Can; Fellah, M; Depollier, C (X ECCOMAS Thematic Conference on Smart Structures and Materials, 2023-07-03)
      This paper discusses the impact of the fractal structure of porous materials on wave behavior. In addition to commonly used parameters such as porosity, tortuosity, viscous and thermal characteristic lengths, a fractal ...

    • Variability of VTEC Gradient and TEC Rate Index Over Kisumu, Kenya During Selected Quiet and Storm Days of 2013 and 2014 

      Uluma Edward, Ndinya Boniface, Omondi George (Science Publishing Group, 2019)
      Vertical Total electron content (VTEC) gradient or rate of change of TEC (ROT) and total electron content (TEC) rate index or rate of change of TEC index (ROTI) can directly be estimated from receiver independent exchange ...

    • Weak Solution of the Singular Cauchy Problem of Euler-Poisson-Darboux Equation for n= 4 

      A Manyonge, D Kweyu, J Bitok, H Nyambane, J Maremwa (2013)
      We consider the singular Cauchy problem of Euler-Poisson-Darboux equation (EPD) of the form utt+ k t ut=∇ 2u u (x, 0)= f (x), ut (x, 0)= 0 where∇ 2 is the Laplacian operator in R n, n will refer to dimension and k a real ...