Know2Look: Commonsense Knowledge for Visual Search

With the rise in popularity of social media, images accompanied by contextual text form a huge section of the web. However, search and retrieval of documents are still largely dependent on solely textual cues. Although visual cues have started to gain focus, the imperfection in object/scene detection do not lead to significantly improved results. We hypothesize that the use of background commonsense knowledge on query terms can significantly aid in retrieval of documents with associated images. To this end we deploy three different modalities - text, visual cues, and commonsense knowledge pertaining to the query - as a recipe for efficient search and retrieval

Acid-catalysed Hydrolysis of N-Phenyl-n-butyrohydroxamic Acid

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N-p-Chlorophenyl-2-thenohydroxamic Acid a Sensitive Reagent for Spectrophotometric Determination of Vanadium

The solvent extraction and spectrophotometric determination of vanadium(V) with N-p-chlorophenyl-2-thenohydroxamic acid (CPTHA) is described. The absorption spectrum of the vanadium(V)- CPTHA extracts in chloroform, from 4 mol/dm3 hydrochloric acid has its absorbance maximum at 530 nm; the reagent being colourless does not absorb at this wavelength. The coloured system obeys Beer\u27s law over a wide range. The molar absorptivity in terms of vanadium is 5500 dm3 mo1-1 cm-1 at 530 nm. The optimum acid range for quantitative extraction of the chelate is 3 to 9 mol/dm3 hydrochloric acid. The method is free from the interference of iron(III) and several other alloying elements which are often associated with vanadium. The method has been successfully used for determination of vanadium in BCS steels

Extractive Spectrophotometric Determination of Vanadium(V) with N-p-Chlorophenyl-2-naphthohydroxamic Acid and Investigation of Its Solid Complex

A simple, selective and sensitive method for the extractive spectrophotometric determination of vanadium(V) using N-p-chlorophenyl- 2-naphthohydroxamic acid (CP-2-NHA) is described. Vanadium( V) is quantitatively extracted from 3-8.4 M HCl as a violet complex with CP-2-NHA into chloroform. Beer\u27s law is applicable in the concentration range 34 and 224 fig of vanadium(V) per 25 ml of chloroform extract. The Sandell sensitivity of the system is 0.0089 μg/cm2 at 530 nm. The method has been satisfactorily employed for the determination of vanadium in steel. The solid complex, VOCI (C11H11N02Cl)2, was prepared and characterised by melting point, elemental analysis, visible and infrared spectra

Extractive Spectrophotometric Determination of Vanadium(V) with N-p-Chlorophenyl-2-naphthohydroxamic Acid and Investigation of Its Solid Complex

A simple, selective and sensitive method for the extractive spectrophotometric determination of vanadium(V) using N-p-chlorophenyl- 2-naphthohydroxamic acid (CP-2-NHA) is described. Vanadium( V) is quantitatively extracted from 3-8.4 M HCl as a violet complex with CP-2-NHA into chloroform. Beer\u27s law is applicable in the concentration range 34 and 224 fig of vanadium(V) per 25 ml of chloroform extract. The Sandell sensitivity of the system is 0.0089 μg/cm2 at 530 nm. The method has been satisfactorily employed for the determination of vanadium in steel. The solid complex, VOCI (C11H11N02Cl)2, was prepared and characterised by melting point, elemental analysis, visible and infrared spectra

Spectrophotometric Studies on the Vanadium(V)-Chelates with N-Arylhydroxamic Acids. A Superior Method for the Extraction and Spectrophotometric Determination of Vanadium in Steels

The reaction of 18 N-arylhydroxamic acids ·with V{V) in different acidities and under varying experimental conditions have been investigated. In concentrated HCl an intensely violet chelate of V(V), which is readily extracted into chloroform, is formed. The substitution in the hydroxamic acid functional grouping affects the hue and spectral characteristics of the V(V)-chelates. It is inferred that N-p-Cl-phenyl-p-methoxybenzohydroxamic acid retains all the useful features of N-phenylbenzohydroxamic acid as a reagent for V(V) but surpasses it in sensitivity and selectivity of the reaction. With this quick method vanadium has been determined in analysed steels without the recourse of masking agents or prior separations. The excellent results obtained on these samples are taken as a proof of the reliability, precision and accuracy of the method

Sequential nature of damage annealing and activation in implanted GaAs

Rapid thermal processing of implanted GaAs reveals a definitive sequence in the damage annealing and the electrical activation of ions. Removal of implantation-induced damage and restoration of GaAs crystallinity occurs first. Irrespective of implanted species, at this stage the GaAs is n-type and highly resistive with almost ideal values of electron mobility. Electrical activation is achieved next when, in a narrow anneal temperature window, the material becomes n- or p-type, or remains semi-insulating, commensurate to the chemical nature of the implanted ion. Such a two-step sequence in the electrical doping of GaAs by ion implantation may be unique of GaAs and other compound semiconductors

Spectrophotometric Studies on the Vanadium(V)-Chelates with N-Arylhydroxamic Acids. A Superior Method for the Extraction and Spectrophotometric Determination of Vanadium in Steels

The reaction of 18 N-arylhydroxamic acids ·with V{V) in different acidities and under varying experimental conditions have been investigated. In concentrated HCl an intensely violet chelate of V(V), which is readily extracted into chloroform, is formed. The substitution in the hydroxamic acid functional grouping affects the hue and spectral characteristics of the V(V)-chelates. It is inferred that N-p-Cl-phenyl-p-methoxybenzohydroxamic acid retains all the useful features of N-phenylbenzohydroxamic acid as a reagent for V(V) but surpasses it in sensitivity and selectivity of the reaction. With this quick method vanadium has been determined in analysed steels without the recourse of masking agents or prior separations. The excellent results obtained on these samples are taken as a proof of the reliability, precision and accuracy of the method

N-p-Chlorophenyl-2-thenohydroxamic Acid a Sensitive Reagent for Spectrophotometric Determination of Vanadium

The solvent extraction and spectrophotometric determination of vanadium(V) with N-p-chlorophenyl-2-thenohydroxamic acid (CPTHA) is described. The absorption spectrum of the vanadium(V)- CPTHA extracts in chloroform, from 4 mol/dm3 hydrochloric acid has its absorbance maximum at 530 nm; the reagent being colourless does not absorb at this wavelength. The coloured system obeys Beer\u27s law over a wide range. The molar absorptivity in terms of vanadium is 5500 dm3 mo1-1 cm-1 at 530 nm. The optimum acid range for quantitative extraction of the chelate is 3 to 9 mol/dm3 hydrochloric acid. The method is free from the interference of iron(III) and several other alloying elements which are often associated with vanadium. The method has been successfully used for determination of vanadium in BCS steels

Activation analysis of rapid thermally annealed Si and Mg implanted semi-insulating GaAs

Electronic properties of Si and Mg implants in undoped semi-insulating GaAs are studied. The activation of the implants is achieved by rapid thermal annealing. The effects of implantation dose and anneal temperature on the measured electrical activity are investigated. In spite of similar depth distributions and implantation damage characteristics, a marked difference between the activations of the Si and the Mg ions is observed for the dose range considered (3×10^12 – 1×10^14 cm^–2). Lattice strain measurements performed by x-ray rocking curves indicate that the residual implantation damage after annealing is not largely responsible for this difference. The difference is mostly electronic in character, as also suggested by photoluminescence measurements. At high annealing temperatures, changes in the compensating properties of undoped semi-insulating GaAs are suspected, and are found to play an important role in the activation of implanted ions, affecting the n- and p-type dopants conversely