101 research outputs found
AI-Driven Innovation in Information Retrieval: Transforming Library Operations and User Engagement
No full textThis study explores the transformative potential of specific AI technologies, such as natural language processing, machine learning, and knowledge graphs, in redefining library operations and enhancing user engagement. An AI-based IR prototype integrating these technologies was developed and deployed in an academic library over three months. The system significantly improved search precision, recall, and user interaction metrics while streamlining library staff operations. User feedback highlighted increased satisfaction, ease of use, and trust in AI-assisted recommendations. These findings demonstrate the capability of these specific AI technologies to bridge the gap between traditional library models and future-ready, user-centric knowledge environments
B-C-N, C-N and B-N nanotubes produced by the pyrolysis of precursor molecules over Co catalysts
No full textB–C–N, C–N and B–N nanotubes, prepared by the pyrolysis of the appropriate precursor compounds around 1000°C in an atmosphere of argon, have been examined by electron microscopy and other techniques. The compositions of the nanotubes have been analysed by electron energy loss spectroscopy and X-ray photoelectron spectroscopy. There is significant compositional variation in B-C-N and C–N nanotubes. Properties of the B–C–N and C–N nanotubes have been compared with those of carbon nanotubes, particularly with respect to the I-V characteristics as obtained from UHV–STM studies. The near absence of B–N nanotubes on pyrolysing the appropriate precursor compound, and other observations made in the present study, indicate the crucial role played by carbon in the initial nucleation and growth of nanotubes
A Wavelet Multiplexing to Reduce Phase Noise Effects in OFDM based DVB-t
No full textAbstractOrthogonal Frequency Division Multiplexing (OFDM) is a highly recommended multiplexing/modulation scheme for high data rate communications due to its high spectrum efficiency and robustness against Inter Symbol Interference (ISI). The OFDM is based on dividing the available spectrum into narrow band orthogonal subcarriers and modulating data on each subcarrier. Due to long symbol period, OFDM system is more sensitive to phase noise of the oscillator compared to single carrier systems. The Phase noise of oscillators used in the transmitters & receivers results in two effects, Common Phase Error (CPE) & Inter Carrier Interference (ICI). These effects results in increasing SNR requirement at the receiver to achieve certain BER. The design & simulation of OFDM based DVB-t system with wavelet multiplexing & demultiplexing and analysis of phase noise effects on BER is presented in this paper. The performance of simulated DVB-t system is analysed by considering SNR requirement to achieve certain BER in the presence of oscillator instabilities on AWGN & mobile radio channels. The modelled Wiener phase noise is generated for different 3dB bandwidths of noise spectrum. The simulation results shows that, the SNR required to achieve a bit rate of 10-2 in wavelet multiplexing is around 6dB lower as compared to FFT counterpart. The result also reveal that PAPR is also less, however wavelet multiplexing computational intensive
Glimpses Of Modern India In Gita Mehta’s ‘Snakes And Ladders
No full textGita Mehta, in her fiction and non-fiction, has dealt with the paradox of the old and the new as a significant component of Indian culture. Scholars tend to believe that the twin factors of tradition and modernity are not antithetical to each other, as some earlier thinkers used to consider. They always co- exist, drawing regularly from each other and work together for the progression of society. Taking into consideration the observations of the scholars on the aspects of tradition, modernity, modernization and westernization, the present article is an effort to study Gita Mehta’s attempt to explore the dual strands of the Indian ritualistic past and its modern rationalistic present, their interaction and their impact on the Indian culture. For this study, Mehta’s non-fiction Snakes and Ladders: Glimpses of Modern India is being taken into consideration
Electrochemical investigation of single-walled carbon nanotubes for hydrogen storage
No full textElectrodes made of purified and open single walled carbon nanotubes behave like metal hydride electrodes in Ni-MH batteries, showing high electrochemical reversible charging capacity up to 800 mAh g(-1) corresponding to a hydrogen storage capacity of 2.9 wt% compared to known AB(5), AB(2) metal hydride electrodes. (C) 2000 Elsevier Science Ltd. All rights reserved
Multimodality Medical Image Fusion Using M-Band Wavelet and Daubechies Complex Wavelet Transform for Radiation Therapy
No full textA Study on Constraints Faced by Farmers in Adapting to Climate Change in Rainfed Agriculture
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