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Article
Publication date: 1 March 1973

John Donaldson, H. Briggs and H. Roberts

November 7, 1972 Master and servant — Redundancy — “Dismissal” — Employees engaged on stainless steel sheet metal work — Withdrawal of stainless steel work — Offer of employment…

Abstract

November 7, 1972 Master and servant — Redundancy — “Dismissal” — Employees engaged on stainless steel sheet metal work — Withdrawal of stainless steel work — Offer of employment on black metal work — Lower rate of pay — Refusal of offer — Whether stainless steel sheet metal work “work of a particular kind” — Redundancy Payments Act, 1965 (c.62) s.l (2) (b).

Details

Managerial Law, vol. 13 no. 6
Type: Research Article
ISSN: 0309-0558

Article
Publication date: 22 July 2020

Igor Lesiuk and Andrzej Katunin

This paper aims to present a numerical analysis and comparison of two types of conductive fillers of polymeric composites subjected to lightning strikes.

Abstract

Purpose

This paper aims to present a numerical analysis and comparison of two types of conductive fillers of polymeric composites subjected to lightning strikes.

Design/methodology/approach

Two types of conductive fillers were considered in the developed numerical models of electrically conductive composites: carbon nanotubes and polyaniline. For these fillers, the representative volume elements were developed to consider distribution of the particles that ensures percolation and homogenization of the materials within the Eshelby-based semi-analytical mean-field homogenization approach. The performed numerical analyses allowed determination of effective volume fractions of conducting particles, resistivity and conductivity tensors, and finally the current density for the simulated materials subjected to lightning strike.

Findings

The obtained results allowed for comparison of electrical conductivity of two simulated materials. It was observed that besides fair results obtained in the previous studies for intrinsically conducting polymers as fillers of composites dedicated for lightning strike protection, the composites filled with carbon nanotubes reveal much better conductivity.

Practical implications

The presented simulation results can be considered as initial information for further experimental tests on electrical conductivity of such materials.

Originality/value

The originality of the paper lies in the proposed design and simulation procedures of conductive composites as well as the comparison of selected composites dedicated for lightning strike protection as the most intensively developed materials for this purpose.

Details

Aircraft Engineering and Aerospace Technology, vol. 92 no. 10
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 2 October 2017

Jason Wallin, Jeffrey Podoshen and Vivek Venkatesh

The second wave (true Norwegian) black metal music scene has garnered attention for its ostensible negative impact upon contemporary consumption. Producers and consumers of the…

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Abstract

Purpose

The second wave (true Norwegian) black metal music scene has garnered attention for its ostensible negative impact upon contemporary consumption. Producers and consumers of the scene, as potential heretics, have been associated with acts of church burning, Satanism, murder, and violence. Such actions have circulated under the signifier of evil, and have been associated with anti-Christian semiotics and pagan practices. Contemporary media has positioned such acts of evil beyond rational comprehension via the deployment of a rhetoric of evil. This enframement has evaded the psychoanalytic question of evil and the significant role of negative ethics in theorizing the allure and potential impact of black metal music. The purpose of this paper is to examine the evil in the music scene, its relation to ID evil, and its consumption and production practices.

Design/methodology/approach

Drawing upon Zizek’s (2006) development of evil through Lacan’s three registers, this paper examines evil production and consumption through a detailed analysis of true Norwegian black metal. The authors rehabilitate the complex corridors of evil against its conceptual collapse as merely the ontological absence of good. Via Zizek, the authors offer a reconsideration of the anti-establishment violent activities enacted by some proponents of black metal ideology. Herein, the authors deploy a reading of ideological evil in order to interrogate the role of enjoyment and desire at work in the black metal scene.

Findings

After extensive immersion in the true Norwegian black metal scene, the authors elucidate on the key issues surrounding good, evil and Satanism, and their relationships to production and consumption. What many might term as “evil” is far more complex than what appears on the surface-level aesthetics.

Originality/value

While there have been examinations of the black metal scene, there has been scant literature that delves deep into the symbolism of the Satanic and the evil beyond the surface. This paper sheds light on the value of exploring evil in a scene as something that is much more than the mere absence of what is considered good.

Details

Arts and the Market, vol. 7 no. 2
Type: Research Article
ISSN: 2056-4945

Keywords

Article
Publication date: 4 March 2014

Aneela Qadeer, Humera Anwer, Talat Mahmood and Muhammad Abbas Bhutto

Nutritional and medicinal properties of black sesame seeds (Sesamum indicum) make it very valuable in traditional system of food. Minerals in Sesamum indicum play an important…

Abstract

Purpose

Nutritional and medicinal properties of black sesame seeds (Sesamum indicum) make it very valuable in traditional system of food. Minerals in Sesamum indicum play an important role to enhance its nutritional value. The present research comprises on proximate and chemical analysis of Sesamum indicum. This study is also based on the development of ashing methods for extraction of metals in black sesame seeds. The paper aims to discuss these issues.

Design/methodology/approach

Black sesame seeds were taken from local market at Karachi-Pakistan. Proximate analysis of seeds comprises of moisture content, ash content and total metal content by EDTA titration. Digestion of this herb was done in different medium, i.e. HNO3, HCl, H2SO4 and simple ash (ash was prepared without using any acid). Atomic absorption spectroscopy was used for the analysis of metals, i.e. Fe, Zn, Cu and Mg in all these ashes.

Findings

From the results it is concluded that best medium for ashing is H2SO4, by which maximum ash (5.39±0.0021 per cent) produced. Qualitative analysis (based on Ksp values) also confirmed the presence of maximum number of metals in H2SO4 medium. Complexometric titration also revealed that maximum metal content was found to be in HCl and H2SO4 ash. Results from atomic absorption spectroscopy revealed that H2SO4 is the best method for copper (0.399±0.0001 mg/g) and iron (0.3993±0.0015 mg/g), while simple ash can extract zinc and magnesium at their maximum level.

Originality/value

This research demonstrates the best ashing method for the extraction of micronutrients, present in Sesamum indicum. These micronutrients are very beneficial for human health.

Details

Nutrition & Food Science, vol. 44 no. 2
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 13 January 2021

Amruta Joglekar-Athavale and Ganapti S. Shankarling

A mixed metal oxide-based spinel ceramic pigment has been successfully synthesized incorporating inorganic, high-temperature stable furnace cement as an inbuilt binder. Step by…

65

Abstract

Purpose

A mixed metal oxide-based spinel ceramic pigment has been successfully synthesized incorporating inorganic, high-temperature stable furnace cement as an inbuilt binder. Step by step synthesis was done for the spinel and cement mix formulations.

Design/methodology/approach

The pigment mix was synthesized by a solid-solid method where the inorganic binder was incorporated in the mix. The results suggested that CoCuMn-based spinel ceramic pigment with cement mix could be obtained at an annealing temperature of 1,100ºC for 1 h and the size, morphology and crystallinity of spinel mix were greatly influenced by the calcination temperature.

Findings

The pigment mix synthesized was applied as a coating to different substrates such as aluminum, glass and Mild steel. The results revealed that spectral selectivity of TSSS paint coatings based on the CoMnCu spinel ceramic mix was much better than that of solvent-based coatings for high-temperature applications. The presence of cement as an inorganic binder makes the functioning and application of paint easy as it becomes that of a waterborne type.

Originality/value

Ease of application, stability at high temperatures, best absorptivity at the solar selective spectrum and excellent adhesion properties for the selected surface are the key features of the designed pigment system. The applied pigment mix was studied as a coating to get the results for solar selective system.

Details

Pigment & Resin Technology, vol. 50 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 3 July 2017

Behnam Seyyedi

The purpose of this paper is to introduce bio-inspired FeN4-S-C black nano-electrocatalyst for the oxygen reduction reaction (ORR) in an alkaline medium. The FeN4-S-C derived…

Abstract

Purpose

The purpose of this paper is to introduce bio-inspired FeN4-S-C black nano-electrocatalyst for the oxygen reduction reaction (ORR) in an alkaline medium. The FeN4-S-C derived without pyrolysis of precursors in high temperature is recognized as a new electrocatalyst for the ORR in an alkaline electrolyte. For the proper design of bio-inspired nano-electrocatalyst for the ORR performance, chlorinated iron (II) phthalocyanine nanoparticles were used as templates for achieving the active sites in aqueous KOH by rotating disk electrode methods. The most active FeN4-S-C catalyst exhibited a remarkable ORR activity in the alkaline medium. The objectives of this paper are to investigate the possibility of nanoscale particles size (˜5nm) of electrocatalyst, to achieve four-electron transfer mechanism and to exhibit much superior catalytic stability in measurements. This paper will shed light on bio-inspired FeN4-S-C materials for the ORR catalysis in alkaline fuel cells.

Design/methodology/approach

The paper presents a new bio-inspired nano-electrocatalyst for the ORR, which has activity nearby platinum/carbon electrocatalyst. Chlorinated iron phthalocyanine nanoparticles have been used as FeN4 template, which is the key point for the ORR. Bio-inspired nano-electrocatalyst has been fabricated using chlorinated iron phthalocyanine, sodium sulphide and carbon black.

Findings

The particles’ size was 5 nm and electron transfer number was 4.

Research limitations/implications

The catalyst that is used in this method should be weighed carefully. In addition, the solvent should be a saturated solution of NaCl in water.

Practical implications

The method provides a simple and practical solution to improving the synthesis of iron-based catalyst for ORR.

Originality/value

The method for the synthesis of bio-inspired electrocatalyst was novel and can find numerous applications in industries, especially as ORR non-precious metal catalyst.

Details

Pigment & Resin Technology, vol. 46 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 28 June 2013

Fawzia Fahim Abdel‐Mohsen and Hassan Salah Aly Emira

This work aimed to prepare black transition metal oxide pigments to be used as solar absorbers in the solar selective and other industrial paints.

Abstract

Purpose

This work aimed to prepare black transition metal oxide pigments to be used as solar absorbers in the solar selective and other industrial paints.

Design/methodology/approach

Mixed metal oxide CoCuMnOx spinel pigments were synthesised via the sol‐gel route. These oxides, namely (I‐Co0.50Cu0.25Mn0.25)Ox, (II‐Co0.25Cu0.50Mn0.25)Ox and (III‐Co0.25Cu0.25Mn0.50)Ox, were prepared with different molar ratios and annealed at 600, 800 and 900°C, respectively. The prepared oxides were characterised by infrared spectrometer (IS), differential scanning calorimetry analysis (DSC), X‐ray diffraction (XRD) and transmission electron microscope (TEM).

Findings

The prepared pigments have a spinel structure with the composition CoCuMnOx. All synthesised pigments consisted of nano particles ranged from 10 to 80 nm. The optical properties showed high absorption and moderately low reflectance in the solar wavelength range.

Research limitations/implications

The prepared samples, used in the present work, were synthesized from cobalt sulphate, copper chloride and manganese chloride. The salts were dispersed in polyacrylamide as a precursor.

Practical implications

The prepared samples were thermally stable and had good optical properties. They could be used as absorber materials in the painting of solar collectors.

Originality/value

These thermally stable mixed metal oxides could be used in the painting of solar collectors. The three mixed metal oxides could be used as absorber materials for heating solar collectors due to their high absorption and moderately low reflectance in the solar wavelength range.

Details

Pigment & Resin Technology, vol. 42 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 2 January 2018

Leighton Jones, Xujun Luo, Algy Kazlauciunas and Long Lin

This paper aims to synthesise and evaluate the properties of a novel smart material consisting of a metal-free organic black pigment with a unique chromophore for bifunctional…

Abstract

Purpose

This paper aims to synthesise and evaluate the properties of a novel smart material consisting of a metal-free organic black pigment with a unique chromophore for bifunctional applications in optoelectronics.

Design/methodology/approach

A robust and highly efficient organic reaction, namely, a double [2 + 2] cycloaddition, was deployed to transform a rod-like structure for charge-transfer applications to a strongly conjugated light-absorbing molecule for both optical and electronic applications.

Findings

The synthesis and characterisation of an air-stable metal-free black pigment is reported, which contains an unconventional donor–acceptor panchromatic chromophore with an absorption window spanning 600 nm; the compound was synthetically converted from an organic semiconducting molecular rod and retains strong charge-transfer properties. The chromophore comprises tetracyanoquinodimethane adduct on either side of a dithienothiophenyl core, capped with hexyl thiophenes that ensure solubility in common organic solvents. Its propensity to form excellent thin films on different substrates such as glass and paper, with a total opacity in organic solvent, gives it the potential for wide-ranging applications in organic optoelectronics.

Research limitations/implications

The synthetic chemistry and fundamental properties are investigated in the present study, with more detailed treatments and analysis to be soon developed. One leading smart material is presented, with further derivatives under investigation.

Practical implications

The work presented shows the possibility of converting structures from one application to another with relative ease, but how they retain properties for both, using well-known and facile conditions.

Originality/value

The structures are novel and an enhanced air-stable organic panchromatic chromophore is reported for processing in common organic solvents.

Details

Pigment & Resin Technology, vol. 47 no. 1
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 July 1982

Americus

Titanate coupling agents have been described for the past decade. What they will do and how they are used has been summarised in an article by Monte, Sugerman, and Seeman [Modern

Abstract

Titanate coupling agents have been described for the past decade. What they will do and how they are used has been summarised in an article by Monte, Sugerman, and Seeman [Modern Paint & Coatings, 67, July (1977) p. 27]. Thus the authors point out that the titanate coupling agents, which are basically organotitanium compounds whose structures are shown in the article, can make possible the formulation of metal oxides, pigments, and extenders into organic systems to produce coatings with improved physical properties, higher solids, and advantages from the points of view of manufacturing and application. In other words the organotitanium compound will couple a pigment or related material with the vehicle by forming chemical bonds. Thus, the authors propose that metal chromates may be replaced in corrosion‐resistant coatings with silica extenders if these silica extenders are coupled to the vehicle with an organopyrophosphatotitanate.

Details

Pigment & Resin Technology, vol. 11 no. 7
Type: Research Article
ISSN: 0369-9420

Article
Publication date: 2 August 2011

Chern‐Sheng Lin, Jung Kuo, Chi‐Chin Lin, Yun‐Long Lay and Hung‐Jung Shei

The purpose of this paper is to apply an on‐line automatic inspection and measurement of surface defect of thin‐film transistor liquid‐crystal display (TFT‐LCD) panels in the…

Abstract

Purpose

The purpose of this paper is to apply an on‐line automatic inspection and measurement of surface defect of thin‐film transistor liquid‐crystal display (TFT‐LCD) panels in the polyimide coating process with a modified template matching method and back propagation neural network classification method.

Design/methodology/approach

By using the technique of searching, analyzing, and recognizing image processing methods, the target pattern image of TFT‐LCD cell defects can be obtained.

Findings

With template match and neural network classification in the database of the system, the program judges the kinds of the target defects characteristics, finds out the central position of cell defect, and analyzes cell defects.

Research limitations/implications

The recognition speed becomes faster and the system becomes more flexible in comparison to the previous system. The proposed method and strategy, using unsophisticated and economical equipment, is also verified. The proposed method provides highly accurate results with a low‐error rate.

Practical implications

In terms of sample training, the principles of artificial neural network were used to train the sample detection rate. In sample analysis, character weight was implemented to filter the noise so as to enhance discrimination and reduce detection.

Originality/value

The paper describes how pre‐inspection image processing was utilized in collaboration with the system to excel the inspection efficiency of present machines as well as for reducing system misjudgment. In addition, the measure for improving cell defect inspection can be applied to production line with multi‐defects to inspect and improve six defects simultaneously, which improves the system stability greatly.

Details

Assembly Automation, vol. 31 no. 3
Type: Research Article
ISSN: 0144-5154

Keywords

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