http://nopr.niscair.res.in/handle/123456789/2617 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/2649 Title: Complex data mapping on a binary ferroelectric liquid crystal electrically addressed spatial light modulator for target recognition <br/> <br/>Authors: Goyal, Shilpi; Nishchal, Naveen K; Beri, Vinod K; Gupta, Arun K <br/> <br/>Abstract: For displaying a complex valued function onto a binary amplitude-only or phase-only spatial light modulator, an encoding technique is required. In this paper, we implement an encoding scheme proposed by Davis et al. [Appl Opt, 42 (2003) 2003] for optical processing the complex product function in the hybrid digital-optical correlator. The output of this correlator consists of two autocorrelation peaks along with a strong dc. Out of these three terms, our interest is in capturing only one of the correlation peaks, while discarding the other correlation peak and strong dc. For capturing only one of the correlation peaks, we multiplied a chirp function with the rotation-invariant maximum average correlation height filter. The product function, that is basically a multiplied product of the input scene’s Fourier spectrum and the chirp-encoded filter, is inverse Fourier transformed to obtain the correlation peaks. Due to chirp encoding, the correlation signals are focused in three different planes. Thus, placing our peak capturing CCD camera at a particular plane we can capture only one autocorrelation peak. Results with almost similar tank images having different energy values have also been shown. <br/> <br/>Page(s): 647-653 Sun, 29 Jul 2007 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/2648 Title: Two-dimensional void probability scaling of grey tracks emitted in ²⁴ Mg-AgBr interaction at 4.5 AGeV/c <br/> <br/>Authors: Ghosh, Dipak; Deb, Argha; Lahiri, Madhumita Bannerjee; Datta, Ishita Sen <br/> <br/>Abstract: This paper presents a very rigorous study of two-dimensional void probability scaling of medium energy target protons emitted in ²⁴Mg-AgBr interaction at 4.5 AGeV/c in terms of their emission angle (θ) and azimuthal angle φ.The study indicates that the two-dimensional void probability scaling holds good for the total region of phase space. <br/> <br/>Page(s): 637-640 Sun, 29 Jul 2007 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/2645 Title: Electrical properties of thermally evaporated doped and undoped films of CdSe <br/> <br/>Authors: Borah, M N; Chaliha, S; Sarmah, P C; Rahman, A <br/> <br/>Abstract: Electrical characteristics of Ag-doped and undoped films of CdSe have been reported. The activation energies at lower and elevated temperatures have been found to be 0.22 and 0.6eV, respectively. The Sn/CdSe junction exhibits Schottky bar-rier characteristics with diode ideality factor deviating from unity. Barrier height obtained from C-V plot and J-V plot are 0.8 and 0.72eV, respectively. The junction has been endowed with high series resistance. <br/> <br/>Page(s): 687-691 Sun, 29 Jul 2007 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/2644 Title: Quantum Monte-Carlo simulation study of attractive Hubbard chain <br/> <br/>Authors: Khurana, Meenakshi S; Kumari, Kamlesh; Singh, Ishwar <br/> <br/>Abstract: Quantum Monte-Carlo simulations of one-dimensional narrow band systems with attractive interactions (U < 0) have been reported. Using Hubbard model, local squared magnetic moments, probability of double occupancy, spin magnetic susceptibility and various spin pairing correlation functions as a function of Coulomb interactions for different band fillings have been studied. <br/> <br/>Page(s): 679-686 Sun, 29 Jul 2007 22:58:59 GMT