Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Transformation mechanism of magnetite nanoparticles

Khan U. S., Amanullah, Manan A., Khan N., Mahmood A., Rahim A.

Materials Science Poland

2015

Vol. 33, No. 2

278--285

A simple oxidation synthesis route was developed for producing magnetite nanoparticles with controlled size and morphology. Investigation of oxidation process of the produced magnetite nanoparticles (NP) was performed after synthesis under different temperatures. The phase transformation of synthetic magnetite nanoparticles into maghemite and, henceforth, to hematite nanoparticles at different temperatures under dry oxidation has been studied. The natural magnetite particles were directly transformed to hematite particles at comparatively lower temperature, thus, maghemite phase was bypassed. The phase structures, morphologies and particle sizes of the produced magnetic nanoparticles have been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectrometry (EDX) and BET surface area analysis.

Efficient Mechanism to Exchange Relevant Messages in Vehicular Ad Hoc Networks

Rahim A., Kong H. Y., Sher M.

Przegląd Elektrotechniczny

2013

R. 89, nr 3a

98--102

Broadcast is the commonly used technique for data dissemination in VANETs .It requires unicast and multicast protocols for connectivity and maintenance of path. Broadcast has the problem of surplus data. In order to resolve it, we modify the” Hello” packet of Optimized Link State Routing Protocol (OLSR) and add a new parameter called preference list. It contains the interest of the vehicle and data which current vehicle has. Due to mobility, there is very short time available for data exchange and limited messages are only communicated according to neighbour preference. We evaluate the modified OLSR with the help of Network Simulator in VANETs scenario. So in this way, surplus data and network load is reduced.

W artykule przedstawiono zmodyfikowany protokół transmisji danych OLSR z dodatkiem tzw. listy preferencji, który wykorzystywano w sieci typu VANET. W związku z mobilnością elementów, możliwa jest tylko krótkoterminowa wymiana danych w ograniczony sposób, wysyłanie wiadomości. Proponowane rozwiązanie pozwala na redukcję danych nadwyżkowych i obciążenia sieci.