Chittagong University of Engineering & Technology

About: Chittagong University of Engineering & Technology is a education organization based out in Chittagong, Bangladesh. It is known for research contribution in the topics: Renewable energy & Dielectric. The organization has 1200 authors who have published 1444 publications receiving 10418 citations. The organization is also known as: Engineering College, Chittagong & Bangladesh Institute of Technology, Chittagong.

Analysis of membrane potential and ion concentration of axon cell

Abstract: This paper provides a study of axon cell in terms of membrane potential and ion concentration using Nernst/Goldman Simulator and MATLAB. Conventional cancer detection only provides sufficient information about growth of cancer on human body, but there is little information about the growth of cancer in axon in terms of membrane potential and ion concentration. In a healthy cell the membrane potential preserves within range of −60 mV to −100 mV where negative sign of the membrane potential indicates that the inside surface of the cell membrane is relatively more negative than the immediate exterior surface. The ratio of ion concentration of major electrolytes, such as Potassium (K) and Sodium (Na) ions (K + , Na + ) remains constant inside and outside of the cell membrane. Ratio of Potassium (K + ) ions outside to inside a healthy cell is 20 ∶ 400 expressed by [K o ] ∶ [Ki] = 20 ∶ 400. The ratio of Sodium (Na + ) ions outside to inside a healthy cell is 440 ∶ 50 expressed by [Na o ] : [Na i ] = 440 ∶ 50. But whenever these cells become cancerous, the value of membrane potential becomes around −15 mV because of water flowing into the cells and Potassium, Magnesium and Calcium being lost from the cell interior and the ratio of electrolytes are no longer sustained within desired values of healthy cell. This paper provides ascending iteration process using Nernst/Goldman Simulator and MATLAB to achieve the desired ion ratios at −15 mV membrane potential in cancerous cell.

Alkaloids and Terpenoids from the Aerial Part of Sida rhombifolia

Abstract: 8-(3′,3′-Dimethylbutyl)-6-hydroxy-2,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidin-3-one (1) and 5-isopentyl-4a,8a-dimethyldecahydronaphthalen-2-ol (2) have been isolated from the aerial part of Sida rhombifolia L. for the first time along with the previously reported stigmasterol. Their structures were established on the basis of spectral and chemical methods.

A new approach to color image watermarking based on joint DWT-SVD domain in YIQ color space

Abstract: The rapid acceleration in the growth of digitized media has made authentication and protection of digital data through watermarking vitally important In this paper, we proposed a semi blind watermarking scheme utilizing both Discrete Wavelength Transform (DWT) and Singular Value Decomposition (SVD) To embed the watermark, we transformed the host image into wavelet domain and generated a secondary host image using directive contrast By remodeling the SVD coefficients of the watermark with the SVD coefficients of secondary image we inserted the watermark into the secondary image A genuine extraction scheme has also been developed to recover the watermark from the cover image The scheme has been employed using horizontal sub band In addition to, evaluations have been added in terms of vertical and diagonal sub bands to compare the performance of the algorithm on the basis of specific sub bands Experimental evaluations in terms of Normalized Correlation (NC) and Peak Signal to Noise Ratio (PSNR) give proof that our procedure is durable and imperceptible under variety of attacks