Results 41 to 50 of about 20,239 (157)

GAS-DISCHARGE LASERS OF THE TERAHERTZ RANGE [PDF]

Радиофизика и электроника, 2017
The terahertz (THz) frequency range now attracts much attention of researchers and consumers in connection with many possibilities of using it for solving a number of practical problems in science, technology and medicine.
M. I. Dzyubenko, Y. E. Kamenev, V. P. Radionov   +2 more
doaj   +1 more source

Heuristic UTD Solution for Antennas Near a Complex Platform

International Journal of Antennas and Propagation, 2019
This paper is aimed at developing an approximate and relatively simple but closed-form uniform geometrical theory of diffraction (UTD) solution for describing the radiated and scattered fields by an antenna near a complex platform consisting of a three ...
Awika Pimpatang, Titipong Lertwiriyaprapa, Chuwong Phongcharoenpanich   +2 more
doaj   +1 more source

Solving the complete pseudo-impulsive radiation and diffraction problem using a spectral element method

Computer Methods in Applied Mechanics and Engineering
21 pages, 11 ...
Jens Visbech, Allan P. Engsig-Karup, Harry B. Bingham   +2 more
openaire   +4 more sources

Application of Ultraviolet Radiation to Control the Calcium Carbonate Scale Formation and Deposition on the Membranes

Journal of Chemistry, 2020
Scale formation on surfaces in contact with water supersaturated with calcium carbonate creates technical problems, including heat transfer hindrance, energy consumption, and equipment shutdown.
Chanbasha Basheer, Mokhtar Rashwan, Eid Al-Mutairi, Amjad A. Shaikh, Khurram Karim Qureshi   +4 more
doaj   +1 more source

Wave Power Absorption by Arrays of Wave Energy Converters in Front of a Vertical Breakwater: A Theoretical Study

Energies, 2020
The present paper deals with the theoretical evaluation of the efficiency of an array of cylindrical Wave Energy Converters (WECs) having a vertical symmetry axis and placed in front of a reflecting vertical breakwater. Linear potential theory is assumed,
Dimitrios N. Konispoliatis, Spyridon A. Mavrakos   +1 more
doaj   +1 more source

A Hybrid Technique Based on the Combination of Multilevel Fast Multipole Algorithm and the Geometrical Theory of Diffraction

International Journal of Antennas and Propagation, 2014
This paper proposes a hybrid technique for treating electromagnetic problems of scattering and radiation in which the source structure is described as an array of antennas.
María-Jesús Algar, Javier Moreno, Iván González, Lorena Lozano, Felipe Cátedra   +4 more
doaj   +1 more source

A Simplified Method for the Evaluation of Floating-Body Motion Responses over a Sloping Bottom

Journal of Marine Science and Engineering
Recently, many floating renewable energy platforms have been deployed in coastal regions, where sloping bottoms are an important factor when evaluating their safety. In this article, a simplified method coupling an eigenfunction matching method (EMM) and
Xiaolei Liu, Kun Gu, Zhijia Qian, Sheng Ding, Kan Wang, Hao Wang, Chen Sun   +6 more
doaj   +1 more source

Wake of a beam passing through a diffraction radiation target

Physical Review Special Topics. Accelerators and Beams, 2008
Diffraction radiation (DR) is one of the most promising candidates for electron beam diagnostics for International Linear Collider and x-ray free electron lasers due to its nonintercepting characteristic.
Dao Xiang, Wen-Hui Huang, Yu-Zheng Lin, Sung-Ju Park, In Soo Ko   +4 more
doaj   +1 more source

Performance of an Array of Oscillating Water Column Devices in Front of a Fixed Vertical Breakwater

Journal of Marine Science and Engineering, 2020
The present study explores the performance of an array of cylindrical oscillating water column (OWC) devices, having a vertical symmetry axis, placed in front of a bottom seated, surface piercing, vertical breakwater.
Dimitrios N. Konispoliatis
doaj   +1 more source

A Novel Method for Estimating Wave Energy Converter Performance in Variable Bathymetry Regions and Applications

Energies, 2018
A numerical model is presented for the estimation of Wave Energy Converter (WEC) performance in variable bathymetry regions, taking into account the interaction of the floating units with the bottom topography.
Kostas Belibassakis, Markos Bonovas, Eugen Rusu   +2 more
doaj   +1 more source