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 quantum capacitance and quantum hall effect of silicene for different fermi energy

Abstract: Silicene is a monolayer of silicon which is again an isostructure to graphene. Due to zero bandgap of graphene, it is now subsided by silicene which opens new opportunities for electrically tunable electronic devices. But before using it as a material in a device, some electronic properties have to be investigated. In silicone, the charge carrier behaves like massless dirac fermion. For this, quantum study is very necessary and mandatory. In this paper, we will observe the quantum capacitance and the quantum hall effect for corresponding Fermi energy level for different spin coupling strength and applied electric energy.

Studies on cobalt(III) complexes of a cyanoethyl derivative of an isomeric hexamethyl tetraazamacrocyclic ligand

Abstract: A 14-membered hexamethyl-tetraazamacrocycle, viz. Me6[14]diene.2HClO4 (L.2HClO4), afforded a mixture of isomeric ligands, Me6[14]anes, upon reduction with NaBH4 and extraction by CHCl3 at pH > 12. These ligands were separated by fractional crystallization from xylene and were designated as ‘tet-a’ and ‘tet-b.’ The interaction of ‘tet-b’ with excess acrylonitrile was fairly stereoselective and formed an N-pendent derivative, ‘tet-bx’, in which two cyano-ethyl groups were attached to trans N-atoms that are sterically less crowded. Aeration of ‘tet-bx’ and cobalt(II) acetate salt in methanol, followed by its treatment with HCl, yielded a bluish-green product, viz. trans-[Co(‘tet-bx’)Cl2]Cl. trans-[Co(‘tet-bx’)Cl2]Cl underwent axial substitution reactions with KSCN and KNO3 and subsequent axial substitution and anion exchange reactions with NaNO2, KBr, and KI to produce six-coordinated octahedral complexes, viz. bluish-green trans-[Co(‘tet-bx’)(NCS)2]Cl, light-blue trans-[Co(‘tet-bx’)(NO3)2]Cl, yellow trans-[Co(‘tet-bx’)(NO2)2]NO2, green trans-[Co(‘tet-bx’)Br2]Br, and red trans-[Co(‘tet-bx’)I2]I. These complexes were characterized using different modern analytical and spectroscopic techniques. The antibacterial activities of the N-pendent ligand and its cobalt(III) complexes on four types of selected bacteria were investigated.

Performance analysis of 1 Tb/s RZ modulated 1550 nm VCSEL based optical link

Abstract: Vertical Cavity Surface Emitting Laser (VCSEL) of 1550nm is used to achieve 1Tb/s optical data transmission over 60km single mode dispersion shifted fiber (DSF) using semiconductor optical amplifier (SOA). Bias current optimization is done for achieving this ultra-high speed operation from VCSEL based system. It is found that for a bias current of 8-11 mA the system supports error free (BER<10-12) data transmission at a data rate of 1Tb/s up to 60km link at a maximum temperature of 44°C.

Effect of Sintering Temperature on (Bi2O3Fe2O3)0.8(Nb2O5)0.2

Abstract: (Bi2O3Fe2O3)0.8(Nb2O5)0.2 was synthesized by solid state reaction method. (Bi2O3Fe2O3)0.8(Nb2O5)0.2 was made for the investigation of X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Dielectric property. XRD pattern reveals that three phases were obtained with Bismuth Iron Niobium Oxide. SEM elicits that grain size increases with the enhancement of sintering temperature. Dielectric property decreases with the augmentation of frequency.

Benefit Based Transmission Expansion Planning for ASEAN Power Grid

Abstract: This paper presents the cost-benefit assessment related to ASEAN Power Grid (APG) integration. This paper explores the benefit of investment in APG by means of cross-border electricity transmission investment in ASEAN region by 2030. The benefit of investing in the cross-border transmission is analyzed by considering the expected generation portfolio. The net market evaluation framework of APG interconnection is developed, including consumer, producer, and transmission owner benefit for APG interconnection. The impact of cross-border transmission capacity on the net market benefit is analyzed by considering the cross-border transmission capacity limit reported by the ASEAN Centre of Energy (ACE) and optimal transmission limits. The study has been conducted in Matlab/MATPOWER using the simulation model of APG.