A Survey on Video Recommendation and Ranking in Video Search Engine

This paper presents a recommender framework which has been created to study examination addresses in the field of news feature suggestion and personalization. The framework is focused around semantically advanced feature information and can be seen as a sample framework that permits look into on semantic models for versatile intelligent frameworks. Feature recovery is possible by positioning the specimens as per their likelihood scores that were anticipated by classifiers. It is frequently conceivable to enhance the recovery execution by re-positioning the examples. In this paper, we proposed a re-positioning strategy that enhances the execution of semantic feature indexing and recovery, by re-assessing the scores of the shots by the homogeneity and the way of the feature they fit in with. Contrasted with past works, the proposed strategy gives a system to the re-positioning through the homogeneous circulation of feature shots content in a worldly arrangement. DOI: 10.17762/ijritcc2321-8169.15021

Synthesis of Hydrogen Getter Zr1-xCox (x=0-1) Alloy Films by Magnetron Co-Sputtering

The Zr1-xCox(x=0, 0.25, 0.53, 0.63, 1) thin films were deposited on quartz substrate using magnetron co-sputtering of Zirconium and Cobalt targets in confocal geometry. A constant pulsed direct current (PDC) on Zirconium and radio frequency (RF) of various powers on Cobalt target were applied to vary the concentration of Co in the Zr1-xCox film. The film composition was quantified using EDX measurements. The hydrogen storage capacity of these films was studied using an in-house developed hydrogen adsorption setup, in which the electrical resistivity of the film was monitored as a function of hydrogen partial pressure and temperature. The films' surface morphology and crystal structure before and after hydrogenation were characterized using atomic force microscopy and grazing incidence X-ray diffraction techniques using synchrotron radiation, respectively. An increase in the particle size after hydrogenation was observed for all the films. An increase in resistivity was also observed due to the absorption of hydrogen in all the compositions. The near stoichiometric film Zr0.47Co0.53 showed the highest hydrogen absorption level at 200 oC at all partial pressures. However, a decrease in the response at temperatures higher than 200 oC was observed in the film containing a Co concentration. The mechanism for the increase in resistivity of the film on hydrogenation is explained. Keywords: ZrCo alloy, hydrogen getter, magnetron co-sputtering, four-probe resistivity, thin film

Phase evolution of vanadium oxides obtained through temperature programmed calcinations of ammonium vanadate in hydrogen atmosphere and their humidity sensing properties

The possibility of obtaining vanadium dioxide (VO2) [wherein the vanadium ionic state is 4þ] from a precursor of ammonium metavanadate (NH4VO3) bearing the ion V5þ is investigated. The reduction is carried out by calcining the NH4VO3 powders in similar concentrations of H2 flow at varying temperatures. The resulting powders have been studied by several techniques including XRD, Raman spectroscopy, FTIR, TEM, BET and DSC. It is found that remnants of bright yellow V5þ still exist up to calcination temperatures of 100 C after which the sky-blue VO2 dominates at calcination temperatures of 150 C e250 C. There is a population surge of metastable dark-blue V6O13 (where V is in between V4þ and V5þ ionic states) between 250 C and 300 C. However above 350 C the material reverts to the stable V5þ in the yellow-orange V2O5. XPS/EDS and VSM confirm the order of appearance to be VO2(150 C) / V6O13(200 C) / V2O5 (350 C).India-Brazil-South Africa trilateral cooperation under the National Research Foundation (NRF) grant number HGER24X.http://www.elsevier.com/locate/matchemphyshb201

Effect of activated carbon on the enhancement of CO sensing performance of NiO

NiO/activated carbon (AC) composites were successfully synthesized via a hydrothermal reflux process as an electrode material for carbon monoxide (CO) gas sensor application. The X-ray diffraction (XRD) analysis was used to investigate the crystallinity of the samples while gas sorption analysis was used to probe the specific surface area of both the pristine NiO and NiO/AC composite. The sensors were subjected to continuous cycles of different CO concentrations and were purged with air after each cycle, followed by variations in a normalized resistance study. The results obtained from the gas sensing analysis disclose that the incorporation of AC into NiO increased the conductivity and surface area of NiO/ AC composite and subsequently enhancing the CO sensing performance of NiO/AC based sensor. These results imply that the NiO/AC composite could be an excellent nanomaterial for CO gas sensors.http://www.elsevier.com/locate/jalcom2018-02-28hb2017Physic

Stability constant determination revisited : A voltammetric method of study of Lead-1, 10 phenanthroline complex

Pb(II)-1,10 phenanthroline complex was studied by Differential Pulse Polarography( DPP) in 1.0M KNO3 as supporting electrolyte at 25OC temperature. Cyclic voltammogramme revealed that Pb (II) - nitrate behaves quasi-reversibly with EC mechanism in the supporting electrolyte. Both stepwise formation constant as well as overall formation of the complex was followed using De Ford and Hume's procedure and overall stability constant b value of the complex was determined as 5.1474 x 1012 with complexation number of 3

A comparative evaluation of awareness regarding periodontal health and oral hygiene practices among dental and medical undergraduate students in Beed District of Maharashtra

Background: Dental and medical students are the healthcare takers of the general population. They play an important role in oral health care and its promotion in the society. Hence, their self-awareness regarding periodontal health and oral hygiene practices is mandatory. Aim: This study aims to evaluate awareness regarding periodontal health and oral hygiene practices among dental and medical undergraduate students. Materials and Methods: A total of 200 participants, out of which 100 medical and 100 dental undergraduate students were selected for this study. Structured questionnaires regarding teeth cleaning habit, use of tooth brushing, tongue cleaning, perception of halitosis, and treatment taken for halitosis were prepared and distributed to collect information regarding awareness of periodontal health and oral hygiene. The data were subjected to statistical analyses. Statistical Analysis: Chi-square test was applied for comparison among dental and medical undergraduate students. P value was considered statistically significant at P < 0.005 level. Results: Strongly significant differences were observed among the dental and medical students in brushing teeth twice daily, routine dental visit for oral hygiene maintenance, self-perception for halitosis, and treatment taken for halitosis (P < 0.005). Conclusion: Both the medical as well as dental professional students must be encouraged to be a good role model in promoting oral health education for their families, friends, patients, and ultimately for the society

Dynamics and vapourization mechanism of liquid droplet in a system of two phase compressible viscous convective flow

This article does not have an abstract

Synthesis of γ-alumina coating by Combustion Chemical Vapour Deposition (C-CVD)

Alumina coatings have been deposited on mild steel, stainless steel (ANSI-304), and silicon (100) using Combustion-Chemical Vapor Deposition (C-CVD) technique. Volatile and easy to prepare aluminum acetylacetonate (Al(acac)3), dissolved in ethanol (0.001 to 0.01 M), was used as a precursor. A premixed diffusion type flame was used as the energy source. The temperature of the flame was controlled by adjusting fuel to oxidant ratio such that the precursor vaporized in the flame without undergoing decomposition. The flame containing the precursor vapor was directed onto the substrate at a glancing angle of 45° for obtaining uniform coating over large surface area. Adherent coatings were obtained on mild steel and silicon; where as the coatings on stainless steel were not very adherent. SEM examination of the microstructure yielded an estimation of cluster size of 400-800 nm. The critical load for coating failure evaluated using an automated scratch-adhesion tester were 5.5 N, 9 N and 12 N on stainless steel (SS), mild steel (MS) and silicon (Si), respectively

Wear and oxidation resistance of combustion CVD grown alumina films

Alumina thin films were synthesized on Si (100) and Ni-20Cr substrates using combustion chemical vapor deposition. Aluminum acetylacetonate (0.005 M) dissolved in ethanol was used as the precursor solution. The films deposited at 900 and 1000 degrees C are found to be theta-alumina and those deposited at 1100 degrees C to be alpha-alumina. The scanning electron micrographs showed the films to be made up of crystallites of two different sizes and shapes. The coefficient of friction, of alumina coated Si samples, measured using a tribometer showed high value (similar to 0.7) at initial passes and subsequently saturated to low value (similar to 0.5) at higher sliding distances. It was observed that the tribological properties, of the films, are not affected significantly by the crystal structure and crystallite size. Oxidation resistance of alumina-coated Ni-20Cr specimens were studied using a thermogravimetric analyzer by exposing them to isothermal heating at 1000 degrees C in 20% O-2-Ar gas mixture. The results indicated that the coated specimens are 18 times more oxidation resistant, at initial stages, compared to uncoated specimens. The resistance slowly dropped to six times, where it reached a saturation value. (c) 2012 Elsevier B.V. All rights reserved

Removal of Noble Metal Ions (Ag⁺) by Mercapto Group-Containing Polypyrrole Matrix and Reusability of Its Waste Material in Environmental Applications

A novel approach was introduced to remove metal (Ag⁺) ions from aqueous solution and subsequently restate the metal-loaded materials for a number of environmentally friendly applications. A versatile adsorbent, polypyrrole with mercapto-functionalized chelating groups (PPy/MAA), successfully adsorbed Ag⁺ ions through subsequent reduction to silver nanoparticles (Ag⁰ NPs) into the composite matrix. The as-prepared composite (PPy/MAA) and Ag-adsorbed PPy/MAA (PPy/MAA/Ag⁰) were fully characterized by FE-SEM, EDS, HR-(S)­TEM, XRD, FTIR, BET, XPS, and zeta potential measurements. Batch adsorption results showed that the adsorption process can be explained well by a pseudo-second-order model. The maximum adsorption capacity calculated using a Langmuir isotherm model was 714.28 mg/g at 25 °C. XRD, XPS, and HR-TEM analyses confirmed the presence of metallic silver nanoparticles on the surface of the composite matrix after the <i>in situ</i> reduction of Ag⁺ to Ag⁰. Among the applications tested, the metal-loaded waste (PPy/MAA/Ag⁰) was found to have antimicrobial activity, as it inhibited the growth of Escherichia coli, while pure adsorbent without silver showed no killing effect toward E. coli. PPy/MAA/Ag⁰ also played an important role in the catalytic reduction of 4-nitrophenol and also exhibited good sensitivity to NO₂ in gas-sensing applications. Therefore, the developed PPy/MAA composite achieved 2-fold environmental benefits, not only remediating Ag⁺ from polluted waterways but also opening a new window for subsequently acting as an agent for antibacterial ability, catalytic activity, and gas-sensing efficiencies