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Colour Constancy using Grey Edge Framework and Image Component analysis
( Martin Savc ),( Bozidar Potocnik ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.12
This article presents a reformulation of the Grey Edge framework for colour constancy. Colour constancy is the ability of a visual system to perceive objects` colours independently of their scenes` illuminants. Colour constancy algorithms try to estimate the colour of an illuminant from image values. This estimation can later be used to correct the image as though it were taken under a white illuminant. The modification presented allows the framework to incorporate image-specific filters instead of the commonly used edge detectors. A colour constancy algorithm is proposed using PCA and FastICA linear component analyses methods for the construction of such filters. The results show that the proposed method improves the accuracies of the Grey Edge framework algorithms whilst on the other hand, achieving comparable accuracies with the state-of-the-art methods, but improving their time efficiencies.
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Exposed Column-Base Plate Connections Bending About Weak: II. Experimental Study
Dae-Yong Lee,Subhash C. Goel,Bozidar Stojadinovic 한국강구조학회 2008 International Journal of Steel Structures Vol.8 No.1
Four exposed-type column-base plate conection sub-asemblages (two for 6-bolt connection and two for 4-bolt conection)were tested under the SAC Phase II loading history in the direction of column weak axis. Mainly investigated in thisexperimental study were global cyclic performance of each test specimen and behavior of major conection elements underlarge column lateral displacements. Also examined were effects of diferent number of anchor bolt, diferent relative strengthone of the four specimens completed the applied entire loading history without significant strength degradation and formed aplastic hinge at the bottom of the column. The other thre specimens showed a limited ductility in the connection. Throughthe experimental study, the Drake and Elkin’s design method that was used for design of the test specimens was evaluated andseveral major findings from the numerical parametric study presented in the companion paper, which is published together,were verified.
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Integrated Hydrolyzation and Fermentation of Sugar Beet Pulp to Bioethanol
( Ton I Rezi ),( Damir Oros ),( Iva Markovi ),( Daniel Kracher ),( Roland Ludwig ),( Bozidar Santek ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.9
Sugar beet pulp is an abundant industrial waste material that holds a great potential for bioethanol production owing to its high content of cellulose, hemicelluloses, and pectin. Its structural and chemical robustness limits the yield of fermentable sugars obtained by hydrolyzation and represents the main bottleneck for bioethanol production. Physical (ultrasound and thermal) pretreatment methods were tested and combined with enzymatic hydrolysis by cellulase and pectinase to evaluate the most efficient strategy. The optimized hydrolysis process was combined with a fermentation step using a Saccharomyces cerevisiae strain for ethanol production in a single-tank bioreactor. Optimal sugar beet pulp conversion was achieved at a concentration of 60 g/l (39% of dry weight) and a bioreactor stirrer speed of 960 rpm. The maximum ethanol yield was 0.1 g ethanol/g of dry weight (0.25 g ethanol/g total sugar content), the efficiency of ethanol production was 49%, and the productivity of the bioprocess was 0.29 g/l?h, respectively.
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