Search results for: RADIO SOUNDINGS

• SOUNDINGS

  Journals

  ISSN: 0038-1861 , eISSN: 2161-6302

• Radio Physics and Radio Astronomy

  Journals

  ISSN: 1027-9636 , eISSN: 2415-7007

• Effective Formula for Impact Damping Ratio for Simulation of Earthquake-induced Structural Pounding

  Publication

  • S. Khatami
  • H. Naderpour
  • R. Barros
  • A. Jakubczyk-Gałczyńska
  • R. Jankowski

  - Geosciences - Year 2019

  Structural pounding during earthquakes may cause substantial damage to colliding structures. The phenomenon is numerically studied using different models of collisions. The aim of the present paper is to propose an effective formula for the impact damping ratio, as a parameter of the impact force model used to study different problems of structural pounding under seismic excitations. Its accuracy has been verified by four various...

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• Radio Journal

  Journals

  ISSN: 1476-4504

• RADIO SCIENCE

  Journals

  ISSN: 0048-6604 , eISSN: 1944-799X

• Wideband Radio Direction Finder Implemented in Software Defined Radio Technology

  Publication

  • K. Cwalina
  • P. Rajchowski
  • J. Sadowski

  - Applied Mechanics and Materials - Year 2015

  In the paper a wideband radio direction finder (RDF) implemented in software defined radio (SDR) technology and the results of hardware layer research, including developed antenna switching unit (ASU), are presented. The results of tests of the devices, which are the part of the software defined radio platform (SDRP), and antenna switching unit, confirmed the possibility of using selected components in the final solution.

• Ratio

  Journals

  ISSN: 0034-0006 , eISSN: 1467-9329

• Analytical expression between the impact damping ratio and the coefficient of restitution in the non-linear viscoelastic model of structural pounding

  Publication

  • R. Jankowski

  - EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS - Year 2006

  Wyniki wcześniejszych badań pokazują, iż nieliniowy model lepko-sprężysty zderzeń konstrukcji budowlanych podczas trzęsień ziemi najdokładniej symuluje siłę zderzenia w czasie kontaktu oraz odpowiedź konstrukcji. Celem niniejszego artykułu jest wyprowadzenie wzoru na zależność pomiędzy liczbą tłumienia zderzenia (parametr wspomnianego modelu) a współczynnikiem odbicia, który jest parametrem często stosowanym i analizowanym w literaturze....

• Advances in Radio Science

  Journals

  ISSN: 1684-9965 , eISSN: 1684-9973

• Survey of Radio Navigation Systems

  Publication

  • P. Falkowski-Gilski
  • J. Stefański

  - International Journal of Electronics and Telecommunications - Year 2015

  At present, there is a growing demand for radio navigation systems, ranging from pedestrian navigation to consumer behavior analysis. These systems have been successfully used in many applications and have become very popular in recent years. In this paper we present a review of selected wireless positioning solutions operating in both indoor and outdoor environments. We describe different positioning techniques, methods, systems,...

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