University of Architecture, Civil Engineering and Geodesy

About: University of Architecture, Civil Engineering and Geodesy is a education organization based out in Sofia, Bulgaria. It is known for research contribution in the topics: Finite element method & Beam (structure). The organization has 3808 authors who have published 3822 publications receiving 30736 citations. The organization is also known as: Sofia Polytechnic.

Fabrication of M-CNT/TiO2 (M=Cr, Mn and Fe) Composites and the effect of Transition Metals on their Photocatalytic Activities:

Abstract: 3-Chloroperbenzoic acid has been used to oxidise a multi-walled carbon nanotube (MWCNT) to obtain more functional groups. Chromium trioxide, manganese oxide and ferric nitrate were used to pretreat...

Application of Areal Change Detection Methods Using Point Clouds Data

Abstract: Surveying techniques such as Terrestrial Laser Scanner have recently been used to measure surface changes via 3D point cloud (PC) comparison. Since there are no signalized points when using laser scanners and no identical points between two epochs, judging an object change detection can only be based on areal methods. A surface based analysis is able to detect changes that are unknown and spread along the whole surface. Existing methods for point cloud comparison and the source of uncertainties are reviewed in the first part of the paper. Current comparison methods are based on a closest point distance or require at least one of the point cloud to be meshed. Better results can be achieved with using Least Square Adjustment of polynomial surfaces (planes and quadric height functions) applied on point cloud data. Examples for change detection based on measurements obtained from terrestrial laser scanning for a double-arc object are given. Two areal methods for comparing two point clouds are used and the obtained results are analyzed.

Preparation of carbon microstructures by thermal treatment of thermosetting/thermoplastic polymers and their application in water purification

Abstract: In this Letter, a facile route to fabricate carbon materials with controllable microstructures by thermal treatment of thermosetting/thermoplastic polymers is presented. Porous carbon was prepared by carbonisation of polystyrene-poly(furfuryl alcohol) (PS–PFA) composites with PS spheres as hard template. The carbon spheres with diameter ∼2–3 µm were obtained through thermal pyrolysis of thermosetting PFA spheres, which were synthesised by polymerisation of furfuryl alcohol under sonication without surfactant. More importantly, the obtained carbon microstructures can be used as adsorbents for water purification, as illustrated by adsorption of methylene blue from contaminated water. The results show that the adsorption performance can be controlled by varying the microstructures of carbon based on thermal treatment of thermosetting/thermoplastic polymers. This Letter not only deepens the understanding of carbon microstructures derived from thermosetting/thermoplastic polymers, but also supplies novel adsorbents for water purification.