Volume 10, Number 01 & 02, 2013

Permanent URI for this collectionhttps://hdl.handle.net/10361/3150

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Now showing 1 - 6 of 6

'Pala sculptures': a highly sophisticated aesthetic taste which greatly influenced the art and architecture of Bengal
(BRAC University, 2013) Sajid-Bin-Doza
Architectural practice in Bengal is notable from the Muslim period, more precisely since the Pre-Mughal as well as the Sultanate era, the architectural practice in this land started with the influences of many stylistic interpretations. The glorious historical monuments and sites are amazed and spectacular with unparallel and brilliant craftsmanship, the influence of those innovations were directed by the religious belief as well as the spiritual sense of acclamation. 'Architectural practice' professionally started with the association of arts and performance in the spaces for offering the deity. To create the space as desired for the deity became powerful with the alliance of dramatic light, scheme of colour textural eminence and over all with the 'Arty surroundings'. Arty or artistic surrounding is the arrangement where deities are transformed into a piece of art. Religious architecture is dull in absent of sculptural arts. This intellect is correct both for interior and outer facades of practicing architecture, the ancient architecture is the co-operational balance of putting thoughts of arts and architecture. During Pala dynasty (781-821 and 821-61) Bengal's art and architecture was full bloomed with the gorgeous craftsmanship by two heroes, According to the account of the the Tibetan Lama Taranath1, during the reign of Devapala there flourished two famous artists-Dhiman and his son Bitopal who produced many outstanding works in sculpture and painting form for architectural majesty. This father and son partnership gave rise two distinct schools of Art which had many followers2. It is probable that many art centers were functioning simultaneously in the different region of the extensive Pala Empire. Sculptures became (he inherent elements in practice of architecture. A large number of stone sculptures discovered throughout Bengal were perhaps the creation of artists from different schools; it is notable that those sculptures were perhaps embedded on the different monasteries or Buddhist structures. Stone has always been a precious material in Bengal and therefore, when Bengal and Bihar came under one rule during the Pala period, the access to the nearest stone quarry in Rajmahal hills o f Bihar became much easier to the Bengal and the availability of stone ensured the creation o f a school of artists to work in this materials. The research focus is to address the Pala sculptures and the architecture o f those days were the soul and integrated part of practice, professional and connotation respected the architecture with the form of art, a brick terracotta facade was accomplished with the illustration of the brilliant stone sculptures. And the movement was entirely motivated in Bengal-an ancient architecture when it was bom to built it was obviously associated with the artistic cooperation- a practice that became unique, rich, and spectacular and became the part of the Heritage. The research will also endow the components of artistic activities that determined and cherish the wisdom of spatial excellence of particular architecture in practice.
Data acquisition and study of He spectrum under electric and magnetic fields
(BRAC University, 2013) Shobahani, M.; Mofiz, U. A.
Data acquisition system for the spectrum of ionized gases is developed and the spectrum of He gas under electric and magnetic fields are studied. The results are shown through captured photographs, which shows that the spectrums are shifted and their intensities varies with the increasing intensity of the electric and magnetic fields.
Rebels through updike and desai's lenses
(BRAC University, 2013) Habib, Mushira
9/11 has redefined the world’s understanding of the term ‘terrorism’ and its association with power and resistance. Post 9/11 novels attempt to represent terrorism or rebellions in a new light by investigating the psycho-social positions of the subjects involved in any such cause or movement. Terrorist (2006) by John Updike portrays Ahmad’s desperate journey towards religious extremism and eventual return brought by his reconciliation with his inner conflicts. Kiran Desai’s The Inheritance of Loss (2006) shows Gyan’s inferiorities that lead to the Gurkha Movement, failing his heroic aspirations and bringing him back to his social reality. Thus both these novels shed light on the individuals that get tangled in the false visions of revolutionary or utopian achievements without any real insight and empathy towards the cause. Hence this paper brings these two characters together to analyse their personal conflicts that ignite deviant tendencies in them and their turn to conformity, reaffirming their ignorant and powerless positions in the society that had originally initiated their rage. This paper thus highlights how the ‘terrorists’ in these two novels end up with an ‘inheritance of loss’ and nothing else.
Bangla-specific study of English Monophthongs
(BRAC University, 2013) Hasan, S. M. Mohibul
The non-phonetic nature of English spelling leads to unpredictable pronunciation. Thus, Bangla-speaking learners of English mispronounce English monophthongs--short and long vowels as contrasted with diphthongs--since they lack specific knowledge about the contrastive elements of their L2 and L1 monophthongs. In order to help them, this essay discusses the redundant and distinctive features of English and Bangla monophthongs; presents English monophthongs with their Bangla near-equivalents; pairs up English short vowels with their long counterparts in ways helpful to Bangla-speaking learners of English; and lists the non-syllabic (both phonemic and non-phonemic) realizations of English long vowels. Finally, it discusses some implications for learners.
Discrete-time PI controller based speed control of DTC interior permanent magnet Shynchronous motor
(BRAC University, 2013) Mannan, Mohammad Abdul; Murata, Toshiaki; Junji, Tamura
Recently, interior permanent magnet synchronous motors (IPMSMs) are becoming more used due to the powerful magnetic characteristic of the rare earth, being used in different areas. Several researchers have proposed implementations combining the use of IPMSM with the direct torque control (DTC) technique offering a quick and precise control. However, DTC can provide only for torque and flux control, the speed controller is also needed to design for high performance of ac motor. The design of the speed controller greatly affects the performance of an electric motor. A common strategy to control an IPMSM is to use direct torque control combined with a PI speed controller. These schemes are not capable to fulfill the requirements of high performance because elimination of steady-state error and overshoot problems and the rejection of load disturbance cannot be achieved simultaneously. This paper proposed a discrete-Time PI (DTPI) controller to control the speed of DTC IPMSM to replace conventional PI controllers to improve the IPMSM performance. In order to obtain the stable performance of speed of IPMSM, the gains of designed DTPI controller are chosen by choosing the proper value of poles. Moreover, the chosen gains of DTPI controller confirm that the steady state error and the overshoot problems can be minimized and the controller becomes robust against the disturbance of load torque. The effectiveness of our propose DTIP controller to control speed of IPMSM incorporated with DTC method is verified by Matlab/Simulink software. It is seen from simulation works that the performance of DTPI controller is better as compared with the conventional proportional integral (PI) controller.
On Terahertz laser pulse propagation in negative index metamaterials
(BRAC University, 2013) Mofiz, U. A.
The nonlinear propagation of a terahertz laser pulse propagation in the resonant region of a negative index meta-material is investigated. The resonant frequency of a split ring resonator (SRR), comprosing the negative index metamaterial, is calculated to be in the order of terahertz. The analysis shows that the negative refractive index in SRR is maintained within a narrow band of the frequency, which is more narrowed down with the intensity of the laser radiation. From Maxwell’s system of equations, a system of coupled equations descring the nonlinear propagation of laser pulse in negative index metamaterials is obtained. The system of the coupled equations are solved analytically in the high frequency and in the low frequency responses. In the high frequency response, a nonlinear field dependent dispersion relation is obtained, and the corresponding group velocity is determined. In the low frequency response, introducing the Lorentz invariant stretched coordinates, a system of coupled nonlinear Schrödinger equations (NLSE) are obtained. Considering the equal intensities of electric and magnetic fields of the laser pulse, the coupled NLSE equations are solved , which shows that the laser radiation creates bright and dark optical solitons, respectively, before and after a critical frequency, within the narrow band, determined by the intensity of the laser radiation. The instability of the bright soliton is investigated while the dark soliton is modulationally stable.

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