Paramagnetic studies of geological and archaeological cherts and age determination of some ancient cherts by ESR technique.

Çetin, Oktay


Parametric investigation of a new multi-band metamaterial design: U-shaped multiple ring magnetic resonators
Turkmen, Oznur; Ekmekci, Evren; Sayan, Gönül (2011-07-08)
In this study, a new multi-band metamaterial structure is proposed based on a unit cell that has multiple U-shaped metal rings printed one inside the other. The number of distinct magnetic resonances is determined by the number of U-shaped rings placed in the unit cell. Using three rings in this paper, three distinct resonance frequencies can be shifted to desired values simply by changing the design parameters which are the metal width w, ring to ring separation s, arm length along y axis for each ring (h(...
Parametric Study and Seasonal Simulations of a Solar Powered Adsorption Cooling System
Taylan, Onur; Baker, Derek Keıth; Kaftanoglu, Bilgin (2009-09-03)
Models of solar-thermal powered adsorption cooling systems with and without heat recovery developed in TRNSYS and results from steady-periodic and seasonal simulations are presented. A normalized model is presented and used to process the seasonal TRNSYS results to investigate the coincidence between the solar-supplied cooling power and cooling load as the relative sizes of the cooling system and storage are varied. The normalized model yields a seasonal solar fraction and seasonal loss fraction (the excess...
Parametric study on the effect of structural and geotechnical properties on the seismic performance of integral bridges
Erhan, Semih; Dicleli, Murat (Springer Science and Business Media LLC, 2017-10-01)
In this paper practical techniques are introduced for detailed modeling of soil-pile and soil-abutment interaction effects for integral bridges (IBs). Furthermore, a parametric study is conducted to determine appropriate structural configurations and geotechnical properties to enhance the seismic performance of IBs. For this purpose, numerous nonlinear structural models of a two-span IB including dynamic soil-bridge interaction effects are built. Nonlinear time history analyses (NTHA) of the IB models are t...
Parametric Analysis of Two-Layer Shallow Flow Modelling for Landslide and Water Waves in Dam Reservoirs
Aksen, Mustafa Meriç; Aydın, İsmail; Department of Civil Engineering (2022-1-31)
Landslides into dam reservoirs can create large water waves which may cause overtopping of the dam body or even dam breaking in extreme cases. Numerical simulations of water surface deformation in the complete dam reservoir after the impact of sliding mass is necessary to predict potential risks of landslide generated waves. Depth integrated shallow flow equations may be useful to model the generation and propagation of water waves in the reservoir after landslides. Coulomb model for the slide material is c...
Parametric study and design of vivaldi antennas and arrays
Erdoğan, Yakup; Dural Ünver, Mevlüde Gülbin; Department of Electrical and Electronics Engineering (2009)
In this thesis, parametric study and design of Vivaldi antennas and arrays are studied. The parameters of single element antennas and arrays are investigated regarding their effects on the design. The return loss responses and radiation patterns are considered in the parametric study. The results of simulations realized using Ansoft HFSS, a high frequency electromagnetic field simulation program, are shown and discussed. Two different Vivaldi antennas operating in 8.5-10.5 GHz frequency band with return los...
Citation Formats
O. Çetin, “Paramagnetic studies of geological and archaeological cherts and age determination of some ancient cherts by ESR technique.,” Middle East Technical University, 1987.