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1 – 10 of over 4000
Article
Publication date: 5 March 2018

Xu Kang and Dechang Pi

The purpose of this paper is to detect the occurrence of anomaly and fault in a spacecraft, investigate various tendencies of telemetry parameters and evaluate the operation state…

Abstract

Purpose

The purpose of this paper is to detect the occurrence of anomaly and fault in a spacecraft, investigate various tendencies of telemetry parameters and evaluate the operation state of the spacecraft to monitor the health of the spacecraft.

Design/methodology/approach

This paper proposes a data-driven method (empirical mode decomposition-sample entropy-principal component analysis [EMD-SE-PCA]) for monitoring the health of the spacecraft, where EMD is used to decompose telemetry data and obtain the trend items, SE is utilised to calculate the sample entropies of trend items and extract the characteristic data and squared prediction error and statistic contribution rate are analysed using PCA to monitor the health of the spacecraft.

Findings

Experimental results indicate that the EMD-SE-PCA method could detect characteristic parameters that appear abnormally before the anomaly or fault occurring, could provide an abnormal early warning time before anomaly or fault appearing and summarise the contribution of each parameter more accurately than other fault detection methods.

Practical implications

The proposed EMD-SE-PCA method has high level of accuracy and efficiency. It can be used in monitoring the health of a spacecraft, detecting the anomaly and fault, avoiding them timely and efficiently. Also, the EMD-SE-PCA method could be further applied for monitoring the health of other equipment (e.g. attitude control and orbit control system) in spacecraft and satellites.

Originality/value

The paper provides a data-driven method EMD-SE-PCA to be applied in the field of practical health monitoring, which could discover the occurrence of anomaly or fault timely and efficiently and is very useful for spacecraft health diagnosis.

Details

Aircraft Engineering and Aerospace Technology, vol. 90 no. 2
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 3 June 2019

Sirine Ben Slima, Naourez Ktari, Mehdi Triki, Imen Trabelsi, Hafedh Moussa, Skandar Makni, Asehraou Abdeslam, Ana Maria Herrero, Francisco Jiménez-Colmenero, Claudia Ruiz-Capillas and Riadh Ben Salah

The purpose of this paper is to investigate the influence of different dietary fibers on color, nutritional, physico-chemical, sensory and textural properties of fresh sausage.

Abstract

Purpose

The purpose of this paper is to investigate the influence of different dietary fibers on color, nutritional, physico-chemical, sensory and textural properties of fresh sausage.

Design/methodology/approach

This study was undertaken to determine the effects of partial beef meat substitution (15, 10.5 and 6 percent) at different combinations: barley beta-glucan concentrate (BBC at 1 percent) alone, carrot fiber (ID809 at 1 percent) alone and a mixture of both fibers (BBC and ID809 at 0.5 percent of each), on the quality of fresh sausage.

Findings

Results revealed that the supplementation of dietary fibers generally decreased protein contents and increased moisture. Color parameters were significantly affected by the addition of dietary fibers. Meat substitution with dietary fibers tended toward red coloration, which enhanced sensory properties of fresh sausages, especially general acceptability. Fresh sausages formulated with a mixture of dietary fibers recorded good firmness. Indeed, it increased extrusion force values and provided a greater hardness at sensory level. This manuscript reports that beef sausage formulated with a mixture of BBC and ID809 and reduced beef meat rate improved acceptability to consumer.

Originality/value

The paper approaches a new subject that may be relevant to functional food. There are few research works to evaluate consumer preferences of new product developments and to achieve healthier and more economic fresh sausages formulated with a mixture of two fibers after reducing beef meat content.

Article
Publication date: 5 July 2019

Mirjana Pejic Bach, Emil Tustanovski, Andrew W.H. Ip, Kai-Leung Yung and Vasja Roblek

System dynamics is a whole-system modelling and learning approach, useful for tackling non-linear problems, such as sustainable urban development. The purpose of this paper is to…

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Abstract

Purpose

System dynamics is a whole-system modelling and learning approach, useful for tackling non-linear problems, such as sustainable urban development. The purpose of this paper is to review system dynamics applications in the simulation of sustainable urban development over a period from 2005 to 2017.

Design/methodology/approach

The analysis reveals that the number of applications of system dynamics modelling in the area of urban sustainable development increased in the analysed period. Research has changed its focus from the modelling of environmental problems to more complex models, portraying the multidimensional socio-economic processes that have an impact on the sustainability of urban development. Analysed case studies most often use the behaviour reproduction test for model validation, but without a unified approach. In most cases, modelling has been done in China, Germany and the USA, while urban development in the Eastern European countries, Africa and Latin America has not often been investigated. This paper indicates the knowledge gaps and suggests future research directions.

Findings

Papers that report the use of system dynamics modelling reveal a wide range of applications in urban sustainability. The analysis shows significant emphasis on environmental problems, while the interest for modelling social problems has been increasing during the last several years. Most of the modelled problems examine the sustainability of resources (land, water) and waste management, which are used for insights into the reasons for the system behaviour, forecasting future behaviour and policy testing.

Originality/value

The presented models were developed in most cases for the purpose of understanding the phenomena examined, as well as the future use of the models in policy planning. This brings us back to the need for greater stakeholder involvement, not only in the initial phase, but also during the whole modelling process, which could increase understanding, use and ownership of the models in the future, and thus increase their practical application.

Details

Kybernetes, vol. 49 no. 2
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 3 April 2017

Olli Suominen, Johanna Kallo, Risto Rinne and Yihong Fan

Different aspects of the globalisation of Chinese basic education have been examined in recent studies. This paper aims to contribute to this research base by examining the…

Abstract

Purpose

Different aspects of the globalisation of Chinese basic education have been examined in recent studies. This paper aims to contribute to this research base by examining the relationship between global quality assurance and evaluation (QAEVAL) trends and reforms in the Chinese basic education system.

Design/methodology/approach

Relevant research literature in English and Chinese was reviewed to assesses whether a movement of increasing convergence with global QAEVAL policy contents and policy instruments has taken place in China following the introduction of the so-called “equality education”. A guiding theory regarding the basic features of QAEVAL was used to conceptually structure the findings of the authors.

Findings

The findings indicate that several subtle convergences are evident in China with global trends in QAEVAL, but a few notable exceptions are also evident.

Research limitations/implications

Albeit the research indicates certain convergence, the authors acknowledge that further research is still needed to examine causal mechanisms of QAEVAL policy convergences and the processes and logic through which global trends are localised.

Originality/value

Both the importance of QAEVAL in global education governance as well as China’s importance to world affairs are increasing. However, so far, the effects of QAEVAL policies on China’s education system have not been thoroughly examined. This paper can serve as a concise starting point for examining the topic more deeply.

Details

Quality Assurance in Education, vol. 25 no. 2
Type: Research Article
ISSN: 0968-4883

Keywords

Book part
Publication date: 16 October 2020

Charles P. Cullinan, Lois B. Mahoney and Linda Thorne

The authors’ examination of corporate social responsibility (CSR) scores in dual-class firms provides a window on firms’ CSR performance when insulated from external pressure…

Abstract

The authors’ examination of corporate social responsibility (CSR) scores in dual-class firms provides a window on firms’ CSR performance when insulated from external pressure. Dual-class ownership confers greater voting rights on a superior class of shares held by insiders; consequently, managers of dual-class firms are insulated from external pressure from inferior class shareholders and, potentially, from society. The authors compare CSR scores in dual- and single-class firms and investigate the association between CSR scores and cash flow rights in dual-class firms. This analysis reveals that dual-class firms have lower CSR scores than their single-class counterparts and that CSR scores in dual-class firms are positively related to the relative cost of CSR borne by the superior class of shares. The findings suggest that external accountability encourages CSR performance, and CSR performance is higher when the superior class bears a smaller portion of the cost of CSR activities. It follows that the analysis suggests the importance of governance structures for encouraging CSR, and the dampening impact of cost to CSR performance.

Details

Research on Professional Responsibility and Ethics in Accounting
Type: Book
ISBN: 978-1-83867-669-8

Keywords

Article
Publication date: 31 August 2022

Peterson K. Ozili and Thankom G. Arun

Managers are concerned about how the macroeconomic environment affects business profit. Focusing on banks, this study aims to investigate the effect of economic policy uncertainty…

Abstract

Purpose

Managers are concerned about how the macroeconomic environment affects business profit. Focusing on banks, this study aims to investigate the effect of economic policy uncertainty (EPU) on bank profitability in 22 advanced countries.

Design/methodology/approach

The study used the panel fixed effect regression methodology to assess the effect of EPU on several measures of bank profitability for 22 advanced countries from 1998 to 2017. The measures of bank profitability are net interest margin, lending-deposit spread, non-interest income (NII) ratio, after-tax return on asset, before-tax return on asset, after-tax return on equity and before-tax return on equity.

Findings

The findings reveal that high EPU negatively affects bank NII. Real gross domestic product growth rate, nonperforming loans and regulatory capital ratio are negatively related to profitability in times of high EPU. The findings also reveal that high EPU has a positive effect on bank profitability in Asia and the region of the Americas, as these regions witnessed high return on equity in times of high EPU.

Practical implications

The implication of the findings is that, although EPU has a depressive effect on some indicators of bank profitability, regional characteristics can ameliorate the depressive effects of EPU on bank profitability.

Originality/value

This study contributes to the literature that examine the economic consequences of EPU on firms. To the best of the authors’ knowledge, this study is among the first to examine how regional characteristics affect the relationship between EPU and bank profitability using cross-country data.

Details

International Journal of Managerial Finance, vol. 19 no. 4
Type: Research Article
ISSN: 1743-9132

Keywords

Book part
Publication date: 6 July 2012

Marius Warg Næss

This chapter presents a preliminary discussion of potential impacts of climate change on nomadic pastoralists on the Qinghai-Tibetan Plateau (QTP). Both climate model projections…

Abstract

This chapter presents a preliminary discussion of potential impacts of climate change on nomadic pastoralists on the Qinghai-Tibetan Plateau (QTP). Both climate model projections and observations suggest that (1) the QTP is becoming warmer and (2) precipitation is increasing. Evidence also suggests that (3) glaciers on the QTP are declining and (4) the permafrost is degrading. Nevertheless, little is known as to how climate change will affect nomadic pastoralists although environmental variability is likely to increase, which may again exacerbate production risks. Pastoral risk management strategies, such as mobility, may thus increase in importance. It is, however, difficult to translate changes in important climate measures like precipitation and temperature to effects on pastoralists and livestock since they mainly affect livestock indirectly via their effect on vegetation productivity. Consequently, to increase our understanding of climate change-related effects on pastoral adaptations, satellite-based measures directly linked to both vegetation characteristics and climatic variables should be utilized in future studies rather than, for example, overall changes in precipitation and temperature. Finally, official policies that constantly introduce reforms that reduce pastoral flexibility represent a far more significant threat for nomadic pastoralists on the QTP than climate change because they may result in the wholesale extinction of the pastoral culture.

Details

Climate Change Modeling For Local Adaptation In The Hindu Kush-Himalayan Region
Type: Book
ISBN: 978-1-78052-487-0

Keywords

Article
Publication date: 1 August 2019

Chunxiao Yin, Libo Liu and Kristijian Mirkovski

The purpose of this paper is to focus on investigating the impact of crowd participation on degree of project success, which is defined as the total amount of funds a project can…

Abstract

Purpose

The purpose of this paper is to focus on investigating the impact of crowd participation on degree of project success, which is defined as the total amount of funds a project can obtain after it reaches its initial funding goal threshold.

Design/methodology/approach

Drawing on the theory of crowd capital, this study develops six hypotheses about the impact of crowd capability of a fundraiser (i.e. project updates, goal setting, reward levels and social media usage) and crowd participation (i.e. namely, funds pledge and on-site communication) on degree of project success. The hypotheses are tested using data sets of successful projects collected from two popular crowdfunding websites.

Findings

This study finds that funds pledge has an inverse U-shaped relationship with degree of project success. Project updates, reward levels and on-site communication positively influence degree of project success, while funding goal negatively affects degree of project success.

Research limitations/implications

This study contributes to prior literature by investigating the degree of project success determinants using the perspectives of both fundraisers and crowds, which provides a more comprehensive understanding of what makes a crowdfunded project a success.

Practical implications

The empirical results of this study provide fundraisers with guidelines about how to access more funds after achieving the initial funding goals.

Originality/value

This work is one of the first to investigate the degree of project success and its determinants from the perspectives of both fundraisers and crowds.

Details

Internet Research, vol. 29 no. 5
Type: Research Article
ISSN: 1066-2243

Keywords

Content available
Book part
Publication date: 15 November 2018

Yi-Ming Wei and Hua Liao

Abstract

Details

Energy Economics
Type: Book
ISBN: 978-1-78756-780-1

Book part
Publication date: 9 November 2023

Winny Perwithosuci, Izza Mafruhah, Evi Gravitiani and Tamat Sarmidi

Environmental degradation is a global concern that results from massive economic activities. Carbon dioxide (CO2) emissions are one of the environmental degradation indicators…

Abstract

Environmental degradation is a global concern that results from massive economic activities. Carbon dioxide (CO2) emissions are one of the environmental degradation indicators. This study investigates the impact of population, oil consumption, international tourist arrival, and corruption on CO2 emissions in ASEAN’s five developing countries of Malaysia, Indonesia, Thailand, Philippines, and Vietnam from 1998 to 2017. This study employed panel Fixed-effect (FE) regression to estimate the panel data generated by British Petroleum and World Bank. The result revealed that the population has a significant positive effect on CO2 emissions. Furthermore, oil consumption has a significant positive effect on CO2 emissions. Meanwhile, the effect of tourism and the corruption perception index (CPI) as a proxy of corruption on CO2 emissions was positive but not significant. Authorities should construct such policies to reduce CO2 emissions by applying low-carbon technologies, green mass transport, and creating less corrupt behavior.

Details

Macroeconomic Risk and Growth in the Southeast Asian Countries: Insight from SEA
Type: Book
ISBN: 978-1-83797-285-2

Keywords

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