Improved Mobility and Transmittance of Room-Temperature-Deposited Amorphous Indium Gallium Zinc Oxide (a-IGZO) Films with Low-Temperature Postfabrication Anneals

Thin films of amorphous indium gallium zinc oxide with high transmittance were deposited at room temperature onto flexible polymer substrates. Postdeposition anneals were performed at low temperatures in different ambients to obtain films with one of the highest transmittance and mobility values reported in the literature. As-deposited and postanneal films were characterized for electrical and optical properties. Oxygen anneal degraded the electrical performance of the films, which was recovered by succeeding vacuum anneals. A surface scattering model is proposed to determine the relation between mobility and carrier concentrations at low values of carrier concentrations. This model takes into account electronic scattering as a result of grain structure and morphology.     

XOR based continuous-tone multi secret sharing for store-and-forward telemedicine

Multimedia Tools and Applications - Traditional k out of n visual cryptography scheme has been proposed to encrypt single secret image into n shares where only k or more shares can decode the...     

Multiple cameras for audio-visual speech recognition in an automotive environment

Audio-visual speech recognition, or the combination of visual lip-reading with traditional acoustic speech recognition, has been previously shown to provide a considerable improvement over acoustic-only approaches in noisy environments, such as that present in an automotive cabin. The research presented in this paper will extend upon the established audio-visual speech recognition literature to show that further improvements in speech recognition accuracy can be obtained when multiple frontal or near-frontal views of a speaker's face are available. A series of visual speech recognition experiments using a four-stream visual synchronous hidden Markov model (SHMM) are conducted on the four-camera AVICAR automotive audio-visual speech database. We study the relative contribution between the side and central orientated cameras in improving visual speech recognition accuracy. Finally combination of the four visual streams with a single audio stream in a five-stream SHMM demonstrates a relative improvement of over 56% in word recognition accuracy when compared to the acoustic-only approach in the noisiest conditions of the AVICAR database.     

Image classification using SURF and bag of LBP features constructed by clustering with fixed centers

Multimedia Tools and Applications - Image classification is the process of assigning a category/class to an image. It has gained much importance in the recent years because of its real-time...     

Prioritization of satellite-derived potential fishery grounds: an analytical hierarchical approach-based model using spatial and non-spatial data

Forecast of potential fishing grounds can save considerable amounts of fuel and time involved in marine fishing operations, making the operation more profitable. This study investigates the prospects of using a decision support system for forecasting potential fishery zones and prioritizing them according to profitability using multi-criteria analysis. Ocean Colour Monitor-derived chlorophyll concentration and National Oceanic and Atmospheric Administration Advanced Very High Resolution Radiometer-derived sea surface temperature maps were integrated to demarcate the potential fishery zones (PFZs). QuickSCAT (NASA) scatterometer wind data obtained from the global 25 km × 25 km gridded dataset were used for updating the locations of PFZ features. An analytical hierarchy process-based prioritization model, which considers different parameters favouring a targeted species, distance to the zone and historical catch per unit effort as the major decision-making parameters, was used to rank the zones based on feasibility. A software package was developed incorporating the above-mentioned functionalities for automatic data processing and PFZ map generation.     

Content-based image retrieval for categorized dataset by aggregating gradient and texture features

Neural Computing and Applications - Content-based image retrieval is the process of retrieving images similar to the Query Image. The task of finding the dissimilarity among the different objects...     

A novel background updation algorithm using fuzzy c-means clustering for pedestrian detection

Multimedia Tools and Applications - The task of pedestrian detection in video surveillance applications will face challenges like dynamic background changes, false human detection (shadow), and...     

Effect of TWEEN 80 on the morphology and antibacterial properties of ZnO nanoparticles

Globule shaped nanoparticles of zinc oxide were prepared using a simple solution combustion method in the presence of TWEEN 80. The nanoparticles were 80 ± 20 nm in size with a hexagonal Wurtzite structure. Fourier transform infrared spectroscopy analysis of the samples showed the presence of no impurities. The size of the nanoparticles decreased with increasing concentration of TWEEN 80, peaking at a concentration of 0.05 M, above which the particle sized started to increase again. The antibacterial studies conducted on all of the samples revealed the superior activity of the zinc oxide nanoparticles prepared using the highest concentration of TWEEN 80.     

Phase transformation of heat-resistant energetic material BDNAPM studied by Raman spectroscopy and X-ray diffraction

Journal of Materials Science - Bis(3,5-dinitro-4-aminopyrazolyl) methane (BDNAPM) is a new insensitive secondary explosive with a high thermal decomposition temperature. The higher thermal...