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1 – 10 of 277
Article
Publication date: 1 February 1992

B. Morten, G. De Cicco, A. Gandolfi and C. Tonelli

A study has been carried out on the relationship between the composition, poling condition and piezoelectric properties of thick film layers. Pastes based on…

Abstract

A study has been carried out on the relationship between the composition, poling condition and piezoelectric properties of thick film layers. Pastes based on lead‐titanate‐zirconate (PZT) powders, with either PbO or a lead‐alumina‐silicate glass frit as binder, were prepared. Microstructure, electrical and mechanical properties were analysed. Processing and poling conditions modify these properties; then a wide latitude of opportunities is offered in the choice of ferroelectric/piezoelectric characteristics of the layers used as sensing elements for sensors. A pressure sensor was realised where a circular diaphragm of alumina supports two piezoelectric layers obtained by screen printing and firing a PZT/PbO‐based ferroelectric paste. The design and the performance characteristics are described.

Details

Microelectronics International, vol. 9 no. 2
Type: Research Article
ISSN: 1356-5362

Article
Publication date: 10 August 2012

Santiago Ibarreche

This paper is a conversation with Maria José Tonelli, conducted by Santiago Ibarreche, about her career as an Iberoamerican scholar.

144

Abstract

Purpose

This paper is a conversation with Maria José Tonelli, conducted by Santiago Ibarreche, about her career as an Iberoamerican scholar.

Design/methodology/approach

Interview.

Findings

The interview explores Tonelli's career, her achievements and continued search for excellence in her institution, the IAM, and her country Brazil, as well as the way she has coped with life's demands.

Originality/value

The interview in this special section, A Life in Research, brings out an individual scholar's experience and history, not only as recognition of scholarly impact, but also as recognition of the person.

Details

Management Research: Journal of the Iberoamerican Academy of Management, vol. 10 no. 2
Type: Research Article
ISSN: 1536-5433

Keywords

Book part
Publication date: 28 July 2014

Theresa Bauer

Social networking sites (SNS) are enjoying growing popularity and have triggered new ethical issues including risks of deception, social grooming, cyber-bullying and…

Abstract

Purpose

Social networking sites (SNS) are enjoying growing popularity and have triggered new ethical issues including risks of deception, social grooming, cyber-bullying and surveillance. This development along with the growing power of SNS providers calls for an investigation of the CSR engagement of SNS companies. The chapter examines to what extent three prominent providers – Google, Facebook and Twitter – fulfill their responsibilities.

Methodology/approach

The chapter draws heavily on a politicized concept of CSR, namely ‘corporate citizenship’ (Crane, Matten, & Moon, 2008a; Matten & Crane, 2005) and ‘political CSR’ (Scherer & Palazzo, 2007, 2011) and discusses the role SNS providers play in administering citizenship rights. The chapter takes a qualitative case study approach.

Findings

Facebook, Twitter and Google have not only made clear commitments to act responsibly, they actually enhance the citizenship status of their users in many ways, e.g. by offering a platform for democracy activists. Deficiencies and contradictions also become visible, e.g. SNS providers inhibit citizenship by failing to provide sufficient privacy protection.

Research limitations/implications

The chapter is limited by its case study approach, but provides valuable insights to an industry with considerable influence. It contributes to CSR research by applying and testing the politicized concept of CSR in the context of SNS providers.

Originality/value

Although SNS have received appraisal as effective tools of CSR communication, there has been little attention to CSR policy and practice of the companies providing social networks. This is unfortunate since the activities of SNS providers directly impact on millions of users worldwide.

Details

Communicating Corporate Social Responsibility: Perspectives and Practice
Type: Book
ISBN: 978-1-78350-796-2

Keywords

Article
Publication date: 21 March 2008

A. Elidrissi, O. Krim and S. Ousslimane

To evaluate in the first stage, the efficiency of changing the nature and the length of diols on the properties of perfectly hard sequences polyurethanes (PU). In the…

Abstract

Purpose

To evaluate in the first stage, the efficiency of changing the nature and the length of diols on the properties of perfectly hard sequences polyurethanes (PU). In the second, the thermal properties of a new series of segmented PU with different concentrations of soft sequences were determined.

Design/methodology/approach

The synthesis of segmented PU has been realised in two stages known as the pre‐polymer method. Various compositions of PU were obtained by keeping the poly(tetramethylene glycol) – PTMG molecular weights constant, but varying its concentration. The products obtained were characterised by IR, NMR, gel permeation chromatography and studied by differential scanning calorimetry.

Findings

The level of phase segregation depends on several parameters, especially the nature of the soft segment and its average molecular weight, nature of the hard sequence and the number of hydrogen bonds established in the PU sequences.

Research limitations/implications

The segmented PU obtained were synthesised from PTMG of number molecular weight 2,000. They could also be synthesised from PTMG of molecular weight 600, 1,000, 2,000, 4,000, etc. The effect of change of PTMG molecular weight on PU properties could also be studied.

Practical implications

Better understanding of the morphology of segmented PU and its effect in the practical domains.

Originality/value

Novel perfectly hard sequences PU have been synthesised and characterised. The effect of soft sequence nature and concentration on the phase segregation in these new series of segmented PU is discussed.

Details

Pigment & Resin Technology, vol. 37 no. 2
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 2 February 2022

Azemeraw Tadesse Mengistu and Roberto Panizzolo

The lack of suitable indicators tailored to manufacturing industries’ needs, particularly to small and medium enterprises (SMEs), has been the major challenge to measure…

Abstract

Purpose

The lack of suitable indicators tailored to manufacturing industries’ needs, particularly to small and medium enterprises (SMEs), has been the major challenge to measure and manage industrial sustainability performance. This paper aims to empirically analyze and select the useful and applicable indicators to measure sustainability performance in the context of SMEs.

Design/methodology/approach

A systematic review was carried out to identify potential sustainability indicators from the literature. A questionnaire was designed based on the identified indicators and then pretested with the selected industrial experts, scholars, and researchers to further refine the indicators before data collection from the Italian footwear SMEs. Fuzzy Delphi method with consistency aggregation method was applied to analyze and select the final indicators.

Findings

The study’s findings show that the selected indicators emphasized measuring progress toward achieving industrial sustainability goals in terms of increasing financial benefits, reducing costs, improving market competitiveness, improving the effectiveness of resources utilization, and promoting the well-being of employees, customers and the community. In doing so, Italian footwear SMEs can contribute to achieving the Sustainable Development Goals (SDGs) by promoting health and well-being, promoting sustainable economic growth, providing productive employment and decent work, and ensuring responsible consumption and production.

Social implications

The results of this study have significant social implications in terms of promoting the well-being of employees, customers, and the community.

Originality/value

By providing empirically supported indicators tailored to measure and manage sustainability performance in the context of SMEs, this paper contributes to the existing knowledge in the field of industrial sustainability performance measurement. Furthermore, it links the selected indicators to their respective SDGs to provide policy implications.

Details

Measuring Business Excellence, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1368-3047

Keywords

Article
Publication date: 1 March 2000

Neli Regina Siqueira Ortega, Paulo Cesar Sallum and Eduardo Massad

Proposes an application of fuzzy set theory to model epidemiological problems. Fuzzy logic has been revealed as a powerful predictive tool in the epidemiology of…

Abstract

Proposes an application of fuzzy set theory to model epidemiological problems. Fuzzy logic has been revealed as a powerful predictive tool in the epidemiology of infectious diseases and some ideas are presented on how this could be done. This work presents an attempt to model the dynamics of rabies among a population of partially vaccinated dogs. This study demonstrates how a dynamical system can be modelled by fuzzy linguistic rules compared to the classical differential equations approach. The results are very encouraging and the approach through a more complex dynamical system is discussed in the final section.

Details

Kybernetes, vol. 29 no. 2
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 8 April 2020

Nilupama Wijewardena, Ramanie Samaratunge, Ajantha Sisira Kumara, Alex Newman and Lakmal Abeysekera

The purpose of this paper is to examine whether family-to-business support acts as a job resource that attenuates the negative effects of work demands on the stress and…

Abstract

Purpose

The purpose of this paper is to examine whether family-to-business support acts as a job resource that attenuates the negative effects of work demands on the stress and creativity of women micro-entrepreneurs in the informal sector in Sri Lanka.

Design/methodology/approach

Data from 359 women micro-entrepreneurs and their respective case officers in local government were used to test the hypothesized relationship between work demands and their creativity through the mediating mechanism of stress and the moderating effect of family-to-business support on the said relationship.

Findings

Work demands reduced creativity through heightening the levels of stress faced by women micro-entrepreneurs. However, family-to-business support reduced the negative influence of work demands on creativity through stress.

Practical implications

Women micro-entrepreneurs should build strong family ties to obtain support from family members. In addition, government training programs that target women micro-entrepreneurs should be extended to include their immediate family members.

Originality/value

This paper contributes to the literature by examining whether family-to-business support buffers the negative effects of work demands for women micro-entrepreneurs in the informal sector. In doing so it makes a theoretical contribution by testing the key tenets of the JD-R model in entrepreneurial settings.

Details

Personnel Review, vol. 49 no. 9
Type: Research Article
ISSN: 0048-3486

Keywords

Article
Publication date: 1 August 1999

V. Lombardi, R. Bongiovanni, G. Malucelli, A. Priola, S. Garavaglia and S. Turri

New acrylic and allylic resins were prepared by functionalising perfluoropolyethers chains, which assured peculiar surface properties. Blends having a different amount of…

Abstract

New acrylic and allylic resins were prepared by functionalising perfluoropolyethers chains, which assured peculiar surface properties. Blends having a different amount of the acrylic and of the allylic systems were cured in air by UV irradiation. The cure of the films was found dependent on the ratio between the two resins; the concentration for the obtaining of a film fully cured in air was determined. On the basis of this concentration, a macromer functionalised with the right amount of both the acrylic group and the allylic one was synthesised.

Details

Pigment & Resin Technology, vol. 28 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 23 November 2021

Mohamed A. Khalifa, Mohamed A. Aziz, Mohamed Hamza, Saber Abdo and Osama A. Gaheen

Fire door should withstand a high temperature without deforming. In the current paper, the challenges of improving the behaviour of the conventional fire door were…

Abstract

Purpose

Fire door should withstand a high temperature without deforming. In the current paper, the challenges of improving the behaviour of the conventional fire door were described using various internal stiffeners in pair swinging-type fire door.

Design/methodology/approach

The temperature distribution on the outside door surface was measured with distributed eight thermocouples. Subsequently the internal side was cooled with pressurized water hose jet stream of 4 bar. The transient simulation for the thermal and structure analysis was conducted using finite element modelling (FEM) with ANSYS 19. The selected cross sections during numerical simulation were double S, double C and hat omega stiffeners applied to 2.2 m and 3 m door length.

Findings

During the FEM analysis, the maximum deformations were 7.2028, 5.4299, 5.023 cm for double S, double C and hat omega stiffeners for 2.2 m door length and 6.57, 4.26, 2.1094 cm for double S, double C and hat omega stiffeners for 3 m door length. Finally, hat omega gives more than three times reduction in the deformation of door compared to double S stiffeners which provided a reference data to the manufacturers.

Research limitations/implications

The research limitation included the limited number of fire door tests due to the high cost of single test, and the research implication was to achieve an optimal study in fire door design.

Practical implications

Achieving the optimum design for the internal door stiffeners where the hat omega stiffener gives minimum door deformation compared to the other stiffeners was considered the practical implication. The work included two experimental fire door tests according to the standard fire test (ANSI/UL 10C – Positive Pressure of Fire Tests of Door Assemblies) for a door of 2.2 m length with double S stiffeners and a door of 3 m length with hat omega stiffeners, which achieved minimum deformation.

Originality/value

The behavior and mechanical response of door leaf were improved through using internal hat omega stiffeners under fire testing. This study was achieved using FEM in ANSYS 19 for six cases of different lengths and stiffeners for fire doors. The simulation model showed a very close agreement with the experimental results with an error of 0.651% for double S and 1.888% for hat omega.

Details

Journal of Structural Fire Engineering, vol. 13 no. 2
Type: Research Article
ISSN: 2040-2317

Keywords

Article
Publication date: 1 February 1999

R. Bongiovanni, G. Malucelli and A. Priola

UV‐curable systems based on the copolymerisation of a typical acrylic resin with low amount of fluorinated monomers (less than 1 per cent w/w) were prepared. The bulk…

235

Abstract

UV‐curable systems based on the copolymerisation of a typical acrylic resin with low amount of fluorinated monomers (less than 1 per cent w/w) were prepared. The bulk properties of the films were unchanged, while a strong modification of the surface was obtained, depending on the monomer structure, on its concentration and on the type of substrate.

Details

Pigment & Resin Technology, vol. 28 no. 1
Type: Research Article
ISSN: 0369-9420

Keywords

1 – 10 of 277