نتایج جستجو برای: low carbon networks
تعداد نتایج: 1829288 فیلتر نتایج به سال:
We report on the production of Carbon Nano Networks (CNNs) from dense microemulsions in which catalyst nanoparticles have been synthesized. CNNs are 3D carbon networks, consisting of branches and junctions, and are mesoporous, graphitic, and conductive being suitable as electrode materials.
Entangled networks of carbon nanofibers are characterized both mechanically and electrically. Results for both tensile and compressive loadings of the entangled networks are presented for various densities. Mechanically, the nanofiber ensembles follow the micromechanical model originally proposed by van Wyk nearly 70 years ago. Interpretations are given on the mechanisms occurring during loadin...
wireless sensor networks (wsns) have many applications in the areas of commercial, military and environmental requirements. regarding the deployment of low cost sensor nodes with restricted energy resources, these networks face a lot of security challenges. a basic approach for preparing a secure wireless communication in wsns, is to propose an efficient cryptographic key management protocol be...
the activation of carbon monoxide by oxygen on mg(100) surface has been investigated by x-ray photoelectron spectroscopy (xps). carbon monoxide is only weakly adsorbed (dispersion-type forces) on a magnesium surface. the xps result has shown that the dissociation of carbon monoxide leading to the formation of a metastable surface carbonate species occurs through the participation of an oxygen s...
This paper started research with the meaning of low-carbon economy and discussed its exerting significance in cities. Then combined with related standard definitions we constructed the city low-carbon economy evaluating index system from aspects of low-carbon production, low-carbon environment, low-carbon consumption and low-carbon policy. The following was to analyze the index system specifica...
Purpose: To identify the effects of social networks on the reading habits of students in Tehran SAMA high schools. Method: Data collection instrument was a questionnaire. A sample of 250 students, selected using Cochran formula, completed the questionnaire. Findings: Results showed that students daily class-related reading time was moderate (3/05). Daily non-class-related reading time was low...
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