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Article
Publication date: 6 July 2015

Quan-Quan Wang, Hong-Bo Zhu, Ru-Shan Chen and Yun-Qin Hu

Analysis of the frequency selective surface (FSS) is of great significance. In the method of moments, when the electric size of the FSS increases, huge in-core memory and CPU time…

Abstract

Purpose

Analysis of the frequency selective surface (FSS) is of great significance. In the method of moments, when the electric size of the FSS increases, huge in-core memory and CPU time are required. The purpose of this paper is to efficiently analyze the finite FSS backed by dielectric substrate utilizing sub-entire-domain (SED) basis function method.

Design/methodology/approach

Different types of SED basis functions are generated according to the locations of the cells in the entire structure, and a reduced system is constructed and solved. The couplings of all cells of the FSS are taken into account by using Green’s function and Galerkin’s test procedure. The spatial Green’s function is obtained with the discrete complex image method. The reflection and transmission coefficients of the FSS are calculated using the far field of the FSS and the metallic plate with the same size.

Findings

Moderate problems of the finite FSS backed by dielectric substrate are solved with the SED basis function method. The original problem can be simplified to two smaller problems. It enables a significant reduction to the matrix size and storage, and efficient analysis of FSS can be performed. The band-stop type of FSS can be composed of periodic conductive patch cells on the dielectric substrate, and shows total reflection property at the resonant frequency.

Originality/value

The SED basis function method is mostly used to analyze periodic PEC structures in free space. The layered medium Green’s function is successfully employed and several dielectric substrate backed finite FSSs are discussed in this paper. The calculation of reflection and transmission coefficients, which are more effective rather than far field scattering of the FSS, are described.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 34 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 6 June 2016

Breda McCarthy, Hong-Bo Liu and Tingzhen Chen

The purpose of this paper is to identify the factors driving the adoption of “green innovations” notably green food and certified organic food and to examine the attitudes of…

2246

Abstract

Purpose

The purpose of this paper is to identify the factors driving the adoption of “green innovations” notably green food and certified organic food and to examine the attitudes of Chinese consumers towards genetically modified food.

Design/methodology/approach

A mixed methods approach was used. A total of 402 consumers responded to a structured questionnaire and 58 consumers responded to a survey designed to gather qualitative data. Data analysis involved content analysis, the probit model, frequency distributions and the t-test for two unrelated means.

Findings

This study shows that affluent, middle class Chinese citizens are opting out of the conventional food market. There is a gender divide, with men showing a preference for green food and females showing a preference for certified organic food. Certified food purchase is associated with demographic variables, such as income, education, age, gender, presence of young children, household size, living in developed cities and overseas experience. A follow-up study shows that the absence of genetically modified organisms (GMOs ) motivates the purchase of organic food. Overall, the results suggest that Chinese consumers are turning towards certified food for health reasons and are sceptical about genetic modification (GM) food.

Research limitations/implications

This paper provides some insights into how Chinese consumers view innovations in the food sector. The study found that almost half of the sample is unaware that the concept of green food is different to that of organic food. The priority for the certified organic industry is to address this lack of knowledge and clearly explain what certified organic food is and how it differs from green food. Small-scale farmers could use consumer aversion to GMOs as a promotional tool. The ultimate goal of this paper is to help marketers better promote certified organic food, but inferences can be drawn in terms of Chinese sustainable consumption. Negative attitudes towards genetically modified foods exist due to human health concerns. Hence, Chinese policy makers need to confront these perceptions, real or perceived, if they wish to maintain public trust in biotechnology.

Practical implications

Based on the qualitative data, stressing the GM-free status is likely to enhance sales since there appears to be a segment of consumers that distrusts GM technology.

Originality/value

The contribution of this research lies in examining what drives the adoption of “green innovations”, notably green food and certified organic food in China. This research is important given that little is known about what Chinese consumers think of, and how they react to, innovations in the agro-food value chain.

Details

British Food Journal, vol. 118 no. 6
Type: Research Article
ISSN: 0007-070X

Keywords

Article
Publication date: 12 December 2023

Kanwal Zahid, Qamar Ali, Zafar Iqbal, Samina Saghir and Muhammad Tariq Iqbal Khan

Environmental protection and conservation of resources is a challenge for policymakers to attain sustainable growth and development. The current study uses the variable of…

Abstract

Purpose

Environmental protection and conservation of resources is a challenge for policymakers to attain sustainable growth and development. The current study uses the variable of inclusive growth instead of the traditional measure of growth.

Design/methodology/approach

The link between inclusive growth, renewable energy, industrial production, trade openness and the environment is explored by using panel data from 1995 to 2019 in Brazil, Russia, India, China and South Africa (BRICS) countries. Before applying formal techniques, unit root tests were applied to check the stationarity of each variable. The long-run relationship among factors was found by the Kao cointegration test. The panel dynamic ordinary least squares (DLOS) was employed for regression estimation.

Findings

The results verified a decrease in ecological footprint (EF) in response to a potential rise in renewable energy consumption. An upsurge in EFs was explored due to a rise in gross domestic product (GDP) per person employed and trade openness. The EF significantly decreased by 0.671% in response to a 1% rise in renewable energy consumption.

Research limitations/implications

It is highly suggested to enhance renewable energy usage. To achieve this, policymakers should implement and emphasize efficient energy technologies to ensure improving the environment. Efficient use of renewable energy resources will decrease global warming effects and ensure the sustainable use of scarce resources.

Originality/value

It first took into account the variable of inclusive growth instead of traditional growth measures. It explored the impact of GDP per person employed as an indicator of inclusive growth.

Details

Kybernetes, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 22 July 2021

Muhammad Tahir, Arshad Hayat and Umar Burki

Environmental degradation is recognized as a serious problem globally, and hence, Saudi Arabia is no exception. This paper aims to focus on the economy of Saudi Arabia to identify…

Abstract

Purpose

Environmental degradation is recognized as a serious problem globally, and hence, Saudi Arabia is no exception. This paper aims to focus on the economy of Saudi Arabia to identify the determinants of environmental degradation.

Design/methodology/approach

Time series data spanning from 1971 to 2014 is used and analyzed using the recently developed autoregressive distributed lag modeling approach.

Findings

The obtained results reflected that natural resources, per person income and urbanization, have impacted environmental degradation both positively and significantly in the long run. Similarly, an insignificant negative relationship is established between trade openness and environmental degradation. Moreover, energy consumption has positively but insignificantly affected environmental degradation. In the short run, only per capita income has positively influenced environmental degradation while the rest of the variables have lost either significance levels or their direction of relationship has reversed.

Originality/value

As this is a pioneering study on the economy of Saudi Arabia, therefore, the authors assume that policymakers will find the findings of the current study very useful while formulating and implementing policies to control environmental degradation.

Details

International Journal of Energy Sector Management, vol. 16 no. 1
Type: Research Article
ISSN: 1750-6220

Keywords

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