Now showing items 368-387 of 526

    • Quantum Hamiltonians and prime numbers 

      Rosu Barbus, Haret-Codratian (2003)
      "A short review of Schrödinger Hamiltonian for which the spectral problem has beenVrelated in the literature to the distribution of the prime numbers is presented here. WeVnotice a possible connection between prime numbers ...
    • Radius evolution for bubbles with elastic shells 

      Mancas, Stefan C; Rosu Barbus, Haret-Codratian; Hsieh, Chun-Chung (Elsevier, 2021)
      "We present an analysis of an extended Rayleigh–Plesset (RP) equation for a three dimensional cell of microorganisms such as bacteria or viruses in some liquid, where the cell membrane in bacteria or the envelope (capsid) ...
    • Raman spectroscopy study of heat-treated and boron-doped double wall carbon nanotubes 

      Villalpando Paez, Federico; Son, Hyungbin; Chou, Shin Grace; Samsonidze, Georgy G.; Kim, Yoong Ahm; Muramatsu, Hiroyukim; Hayashi, Takuya; Endo, Morinobu; Terrones Maldonado, Mauricio; Dresselhaus, Mildred (2009-07)
      "We performed Raman spectroscopy experiments on undoped and boron-doped double walled carbon nanotubes (DWNTs) that exhibit the "coalescence inducing mode" as these DWNTs are heat treated to temperatures between 1200 C and ...
    • Ramanujan sums for signal processing of low-frequency noise 

      Planat, Michel; Rosu Barbus, Haret-Codratian; Perrine, Serge (2002)
      "An aperiodic (low-frequency) spectrum may originate from the error term in the mean value of an arithmetical function such as Mobius function or Mangoldt function, which are coding sequences for prime numbers. In the ...
    • Reactividad y propiedades catalíticas de partículas subnanométricas de Pt y FePt: un estudio basado en la teoría de la funcional de la densidad 

      Rodríguez y Domínguez Kessler, Peter Ludwing (2015-11)
      "Atomic clusters constitute a new phase of matter, being the bridge between atoms and bulk. These systems have generated considerable interest, triggering one extensive research due to the fact that their physical and ...
    • Reconfigurable dynamical logic gate with linear core 

      Campos Cantón, Eric; Campos Cantón, Isaac; Rosu Barbus, Haret-Codratian (2013)
      "A dynamically reconfigurable linear core logic gate is a device that allows logical outputs dependent upon configurable parameters set within device. The device is comprised of three blocks: The first block receives at ...
    • Recrystallization of a Ti-45Ni-5Cu cold-worked shape memory alloy characterized by thermoelectric power and electrical properties 

      Soto-Parra, Daniel Enrique; Flores Zúñiga, Horacio; López Cuéllar, Enrique Manuel; Ochoa-Gamboa, Raul Armando; Ríos Jara, David (2014)
      "The recrystallization of a cold-worked shape memory alloy (SMA) without R-phase transition, i.e. the Ti-45.0Ni-5.0Cu (% at.), has been studied by thermoelectric power (TEP) technique and electrical resistivity change (Dρ) ...
    • Recuperación mejorada de petróleo con D-Limoneno diluido en salmuera 

      Gaitan-Espinosa, Mauricio (05/02/2020)
      D-Limonene, a compound consisting of terpenes in its dextrogyrous form, is used as a degreaser, hydrocarbon waste cleaner and as a sand oil separator. In this thesis, the use of this solvent is proposed as a chemical ...
    • Refrigerant capacity of austenite in as-quenched and annealed Ni51.1Mn31.2In17.7 melt spun ribbons 

      Sánchez Llamazares, José Luis; Flores Zúñiga, Horacio; Sánchez Valdés, Cesar Fidel; Ross, Caroline A.; Garcia, Carlos (2012-04)
      "The thermal dependence of the magnetic entropy change (Delta S-M(T)) and refrigerant capacity (RC) of austenite in as-quenched ribbons of chemical composition Ni51.1Mn31.2In17.7 produced by melt spinning at a high cooling ...
    • Relation of the average interaction field with the coercive and interaction field distributions in First order reversal curve diagrams of nanowire arrays 

      Velázquez Galván, Yenni Guadalupe; Lobo Guerrero, Azdrubal; Martínez Huerta, Juan Manuel; Araujo Palomo, Elsie Evelyn; Tabasum, Muhammad Ramzan; Nysten, Bernard; Piraux, Luc; Encinas Oropesa, Armando (Nature Publishing Group, 2020)
      "First-order reversal curve diagrams, or FORC diagrams, have been studied to determine if the widths of their distributions along the interaction and coercivity axes can be related to the mean-field magnetization dependent ...
    • Relativistic Rotating Electromagnetic Fields 

      Vargas Rodríguez, Hector; Gallegos Infante, Luis Armando; Muñiz Torres, Miguel Angel; Rosu Barbus, Haret-Codratian; Domínguez Chávez, Paulino Javier (Hindawi, 2020)
      "In this work, we consider axially symmetric stationary electromagnetic fields in the framework of special relativity. These fields have an angular momentum density in the reference frame at rest with respect to the axis ...
    • Remoción de la aberración cromática lateral en imágenes de microscopía óptica de campo claro 

      Guzmán Altamirano, Miguel Angel (2015-11)
      "Here we present the development of a method to reduce lateral chromatic aberration in captured images of a student grade bright field microscope. Prior to the description of the main job, we show the development of a ...
    • Removing lateral chromatic aberration in bright field optical microscopy 

      Guzmán Altamirano, Miguel Angel; Gutiérrez Medina, Braulio (Optical Society, 2015)
      "We present an efficient alternative to remove lateral chromatic aberration (LCA) in bright field light microscopy images. Our procedure is based on error calibration using time-sequential acquisition at different wavelengths, ...
    • Reply to the comment by Axel Schulze-Halberg 

      Rosu Barbus, Haret-Codratian; Cornejo Pérez, Octavio; Chen, Pisin (2013)
      "Reply to Comment on H.C. Rosu, O. Cornejo-Perez and P. Chen, \Nonsingular parametric oscillators Darboux related to the classical harmonic oscillator by A. Schulze-Halberg"
    • Riccati nonhermiticity with application to the Morse potential 

      Cornejo Pérez, Octavio; López Sandoval, Román; Rosu Barbus, Haret-Codratian (2005)
      "A supersymmetric one-dimensional matrix procedure, similar to the relationships of the same type between Dirac and Schrodinger equations in particle physics, is described in the general terms. By this means, we are able ...
    • Riccati parametric deformations of the Cornu spiral 

      Rosu Barbus, Haret-Codratian; Mancas, Stefan C; Flores Garduño, Elizabeth (Walter de Gruyter GmbH, 2018)
      "In this article, a parametric deformation of the Cornu spiral is introduced. The parameter is an integration constant which appears in the general solution of the Riccati equation and is related to the Fresnel integrals. ...
    • Riccati-parameter solutions of nonlinear second-order ODEs 

      Reyes, Marco A.; Rosu Barbus, Haret-Codratian (2008)
      "It has been proven by Rosu and Cornejo-Pérez [1, 2] that for some nonlinear second-order ODEs it is a very simple task to find one particular solution once the nonlinear equation is factorized with the use of two first-order ...
    • Robust fringe pattern analysis method for transient phenomena 

      Rivera, Mariano (Elsevier, 2018)
      "We propose a method for analysing a sequence of noisy interferograms with closed fringes acquired at a high–speed frame rate. Our method is appropriate for analysing ESPI sequences of transient phenomena such as deformations ...
    • Robustness of the enhanced magnetic anisotropy in Ni nanowires regardless of the deposition potential 

      Velázquez Galván, Yenni Guadalupe; De la Torre Medina, Joaquín; Piraux, Luc; Encinas Oropesa, Armando (Elsevier, 2020)
      "The effects of the deposition potential on the structural and magnetic properties of Ni nanowires with a diameter of 40 nm and lengths varying from 16 up to 56 pm have been studied. The results show that very long NWs ...
    • Room temperature ferromagnetism and ferroelectricity in strained multiferroic BiFeO3 thin films on La0.7Sr0.3MnO3/SiO2/Si substrates 

      Ramírez Camacho, Mayra Cecilia; Sánchez Valdés, Cesar Fidel; Gervacio Arciniega, José Juan; Ostos, Carlos; Bueno Baques, D.; Curiel Álvarez, Mario; Sánchez Llamazares, José Luis; Raymond Herrera, Oscar (Elsevier B.V, 2017-04)
      "A novel ferromagnetic state coexisting with ferroelectric ordering at room temperature in strained BiFeO3 (BFO) thin films grown using a sputtering technique on La0.7Sr0.3MnO3/SiO2/Si(100) (LSMO/SOS) substrates is reported. ...