Results 71 to 80 of about 392,150 (219)

Effects of La2(CO3)3 on microstructure and mechanical properties of ZM-5 magnesium alloy [PDF]

open access: yesChina Foundry, 2010
The optical microscope (OM), scanning electron microscope (SEM) with energy dispersive spectrometer(EDS) and X-ray diffractometer (XRD) are employed to analyze the effect of La2(CO3)3 on microstructure and mechanical properties of ZM-5 magnesium alloy ...
Liu Chuang, Li Yusheng, Ma Zhiyi
doaj  

The influence of stirring on the fading of the AlTi5B1 grain refiner in an Al–Fe alloy [PDF]

open access: yesMetalurgija, 2011
An Al–Fe alloy, melted in an induction furnace with a graphite crucible, was grain refined with the AlTi5B1 grain refiner. The melt was stirred after the addition of the grain refiner. The first sample was cast two minutes after the addition of the grain
I. Naglič
doaj  

Fading Duration in Line-of-sight Radio Links at 6 GHz

open access: yesJournal of Telecommunications and Information Technology, 2013
Broadband fixed wireless access, local multipoint distribution service networks are promising wireless solutions to connect fixed users to the backbone network instead of wired copper or fiber optic networks, via point-to-multipoint cellular networks ...
Jan Bogucki, Ewa Wielowieyska
doaj   +1 more source

Juan Carlos Onetti : La escritura con propósitos

open access: yesCuadernos LIRICO, 2013
We will consider the analysis of the writing processes in Juan Carlos Onetti’s novel Juntacadáveres(1964), focusing our work on documents, manuscripts and typescripts corrected by hand by the author himself. In the manuscripts where he drew up chapters 1
María Alejandra Alí
doaj   +1 more source

Channel characterization in the 5.8GHz band in a suburban area

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications, 2014
Based on signal measurements carried out in the 5.8 GHz band, which is reserved for unlicensed WiMAX in Brazil, this paper evaluates narrowband and wideband characteristics on the suburban area of Tanguá city in Rio de Janeiro State.
Wilyam D. T. Meza   +2 more
doaj  

Performance of modified and low complexity pulse shaping filters for IEEE 802.11 OFDM transmission

open access: yesJournal of Information and Telecommunication, 2019
The most commonly used multicarrier modulation method in 802.11 wireless communication systems is Orthogonal Frequency Division Multiplexing (OFDM). However, OFDM is easily affected by Inter Symbol Interference (ISI).
Tulsi Pawan Fowdur, Louvi Doorganah
doaj   +1 more source

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