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Article
Publication date: 6 August 2020

Niu-Jing Ma, Li-Xiong Gu, Long Piao and Xing-Zhi Zhang

Stiffened plates have been widely used in civil, marine, aerospace engineering. As a kind of thin-walled structure operating in complex environment, stiffened plates…

Abstract

Purpose

Stiffened plates have been widely used in civil, marine, aerospace engineering. As a kind of thin-walled structure operating in complex environment, stiffened plates mostly undergo a variety of dynamic loads, which may sometimes result in large-amplitude vibration. Additionally, initial stresses and geometric imperfections are widespread in this type of structure. Furthermore, it is universally known that initial stresses and geometric imperfections may affect mechanical behavior of structures severely, particularly in dynamic analysis. Thus, the purpose of this paper is to study the stress variation rule of a stiffened plate during large-amplitude vibration considering initial stresses and geometric imperfections.

Design/methodology/approach

The initial stresses are represented in the form of initial bending moments applying to the stiffened plate, while the initial geometric imperfections are considered by means of trigonometric series, and they are assumed existing in the plate along the z-direction exclusively. Then, the dynamic equilibrium equations of the stiffened plate are established using Lagrange’s equation as well as aforementioned conditions. The nonlinear differential equations of motion are simplified as a two-degree-of-freedom system by considering 1:2 and 1:3 internal resonances, respectively, and the multiscale method is applied to solve the equations.

Findings

The influence of initial stresses on the plate, stresses during internal resonance is remarkable, while that is moderate for initial geometric imperfections. (Upon considering the existence of initial stresses or geometric imperfections, the stresses of motivated modes are less than the primary mode for both and internal resonances). The influence of bidirectional initial stresses on the plate’s stresses during internal resonance is more remarkable than that of unidirectional initial stresses. The coupled vibration in 1%3A2 internal resonance is fiercer than that in internal resonance.

Originality/value

Stiffened plates are widely used in engineering structures. However, as a type of thin-walled structure, stiffened plates vibrate with large amplitude in most cases owning to their complicated operation circumstance. In addition, stiffened plates usually contain initial stresses and geometric imperfections, which may result in the variation of their mechanical behavior, especially dynamical behavior. Based on the above consideration, this paper studies the nonlinear dynamical behavior of stiffened plates with initial stresses and geometrical imperfections under different internal resonances, which is the originality of this work. Furthermore, the research findings can provide references for engineering design and application.

Details

Engineering Computations, vol. 38 no. 2
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 13 July 2018

Luca Gastaldi, Francesco Paolo Appio, Mariano Corso and Andrea Pistorio

The purpose of this paper is to understand how digital technologies can help healthcare organisations and improve the exploration-exploitation paradox over time. The…

Abstract

Purpose

The purpose of this paper is to understand how digital technologies can help healthcare organisations and improve the exploration-exploitation paradox over time. The authors explore inputs, processes and outcomes of implementing digital transformation programs and advance four testable propositions.

Design/methodology/approach

The authors conducted multiple case studies with embedded units of analysis: digital transformation processes; hospitals; and regional healthcare systems. Primary sources come from 107 semi-structured interviews with key informants within 14 Italian hospitals between 2009 through 2011.

Findings

Three complementary paths emerge as fundamental to balance exploratory and exploitatory efforts in healthcare: assets digitalisation within hospitals; digitally based process integration; and disruptive decision-making through analytics. Intra- and inter-path characteristics are discussed to show how digital transformation can both move hospital within the exploration-exploitation space.

Research limitations/implications

By its very nature, this study is exploratory. Notwithstanding the number of cases and interviews, its generalisability is limited.

Practical implications

Digital transformation programs are fundamental to resolve the tensions raised by the exploration-exploitation paradox. Their implementation leads to better performance (cost reductions, quality improvements). A framework is provided for practitioners to make better decisions.

Originality/value

This study sheds new light on how digital technologies are actually adopted and adapted in healthcare contexts. It does it by entailing a longitudinal perspective.

Details

Business Process Management Journal, vol. 24 no. 5
Type: Research Article
ISSN: 1463-7154

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Book part
Publication date: 4 August 2014

Guktae Kim and Moon-Goo Huh

Despite the theoretical assumption that balancing exploration and exploitation is important for long-term performance and survival, previous studies have provided few…

Abstract

Despite the theoretical assumption that balancing exploration and exploitation is important for long-term performance and survival, previous studies have provided few insights into these relationships because they have focused mainly on the short-term financial performance of organizations. In addition, balancing exploration and exploitation is a critical challenge for small- and medium-sized enterprises (SMEs) that lack the resources, capabilities, and experience necessary to achieving ambidexterity. In this regards, this study empirically explores the relationship between the exploration–exploitation balance and SMEs’ longevity in order to address two important questions from the ambidexterity perspective: (1) How does the balance between exploration and exploitation influence organizational survival? (2) How is the appropriate balance between exploration and exploitation influenced by an organization’s internal and external contexts?

An analysis of 1981–2012 data from the Korean SMEs in IT industry reveals an inverted U-shaped curvilinear relationship between the extent of exploratory innovation and organizational longevity, providing support for the ambidexterity perspective. We further examine the moderating effects of financial slack and environmental dynamism on the relationship between exploratory innovation and organizational longevity. The results indicate that financial slack moderated the exploration–longevity relationship and call for a contingency approach for a better understanding of performance implications of the exploration–exploitation balance.

Details

Exploration and Exploitation in Early Stage Ventures and SMEs
Type: Book
ISBN: 978-1-78350-655-2

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Article
Publication date: 30 April 2021

The Nguyen Huynh

The aim of this article is to investigate the determinants of the performance of small and medium-sized enterprises in emerging markets: evidence from Vietnam.

Abstract

Purpose

The aim of this article is to investigate the determinants of the performance of small and medium-sized enterprises in emerging markets: evidence from Vietnam.

Design/methodology/approach

This article relies on the resource-based view to examine the factors affecting the performance of small and medium-sized enterprises in emerging markets. The method employed in the research is the generalized method of moments for testing hypotheses of data collected from the General Statistics Office of Vietnam in the period of 2013–2016.

Findings

The results show that factors such as the intensity of capital investment, age and size of the firm, labor productivity, foreign ownership, location, cost management effectiveness and export activities have a positive effect on the performance of Vietnamese small and medium-sized enterprises, while revenue growth rate, fixed assets and financial leverage tend to hinder their performance. This has brought important messages that the input markets and the business environment in emerging markets like Vietnam have not yet stimulated well-economic activities.

Originality/value

This study sheds light on a topic that has not been fully explored in small and medium-sized enterprises in emerging markets in general, and Vietnam in particular. Specifically, small and medium-sized enterprises in emerging markets reconfigure available resources and strengthen internal capabilities to overcome barriers of the shortages of strategic, rare and irreplaceable resources in order to improve their performance. This is a unique contribution to the existing literature and highlights the original value of this article.

Details

International Journal of Productivity and Performance Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1741-0401

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Article
Publication date: 6 May 2014

Ming Piao

The purpose of this paper is to investigate the longevity implications of exploitation and exploration. It examines the main effect of exploitation, the main effect of…

Abstract

Purpose

The purpose of this paper is to investigate the longevity implications of exploitation and exploration. It examines the main effect of exploitation, the main effect of exploration, and the interaction effect of exploitation and exploration on organizational longevity.

Design/methodology/approach

This study employs Cox Proportional Hazard Model in analyzing 20-year data from the hard disk drive industry.

Findings

Exploitation, independent of exploration, has a positive impact on organizational longevity. Exploration, independent of exploitation, has a curvilinear impact on organizational longevity. Jointly, exploitation weakens the curvilinear relationship between exploration and organizational longevity.

Research limitations/implications

This study challenges the dualistic view that exploitation is for “current viability” and exploration is for “future viability.” It suggests that firms need to actively engage in (instead of compromise) both exploitation and exploration in order to prolong their lifespan despite the counter force triggered by the negative dynamics between exploitation and exploration.

Practical implications

In order to prolong organizational longevity, firms need to fully engage in (but not compromise) their existing product-market domains, actively explore (but not over-explore) their new product-market domain, and to embrace (but not avoid) the tension between exploitation and exploration.

Originality/value

This study is one of the few that systematically and empirically examined the longevity implications of exploitation and exploration. It adds specificity and precision to the understanding of how exploitation and exploration, independently and jointly, affect organizational longevity.

Details

European Journal of Innovation Management, vol. 17 no. 2
Type: Research Article
ISSN: 1460-1060

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Article
Publication date: 30 April 2020

Sylvaine Lemeilleur, Julie Subervie, Anderson Edilson Presoto, Roberta Souza Piao and Maria Sylvia M. Saes

This paper investigates the incentives to coffee farmers to participate in certification schemes that require improved agricultural practices.

Abstract

Purpose

This paper investigates the incentives to coffee farmers to participate in certification schemes that require improved agricultural practices.

Design/methodology/approach

The authors ran a choice experiment among 250 Brazilian coffee farmers in the state of Minas Gerais, Brazil.

Findings

The authors’ findings show that both cash and non-cash payments are likely to incentive farmers' participation in a certification scheme. Besides price premium, incentives as long-term contracts and provision of technical would encourage producers to adopt eco-certification schemes. Our results also suggest that non-cash payments may be appropriate substitutes to a price premium to some extent.

Research limitations/implications

The large coffee producers are over-represented in our sample compared to the population of Brazilian coffee farms. However, it seems reasonable to focus on these producers, as they are usually the ones who individually adopt strategies, since small farmers are induced by collective strategies (e.g. cooperatives).

Social implications

The result regarding technical assistance makes sense given that Brazilian farmers generally have poor access to rural extension services.

Originality/value

We contributed in the literature about adoption of sustainable agriculture practices analyzing the requirements and motivations for farmer participation in certification schemes. We also contribute private and public strategies to encourage the adoption of sustainable practices.

Details

Journal of Agribusiness in Developing and Emerging Economies, vol. 10 no. 4
Type: Research Article
ISSN: 2044-0839

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Book part
Publication date: 11 May 2007

Vivian Heung and David Grossman

This study aims to make explicit fundamental challenges, which includes children with disabilities and special educational needs in education in China, Hong Kong, and…

Abstract

This study aims to make explicit fundamental challenges, which includes children with disabilities and special educational needs in education in China, Hong Kong, and Indonesia under the current conceptions of Inclusion and Education for All (EFA). Based on extensive research and staff development work in these places, this chapter argues for uniting the aims of inclusive education and EFA in order to realize the goal of EFA in all countries. Such a transformative agenda will require a new model of looking at difficulties in learning and the concept of diversity in education. Unless a conscious effort is made to move our thinking and planning from EFA to Inclusive EFA, we will not achieve true universal education.

Details

Education for All
Type: Book
ISBN: 978-0-7623-1441-6

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Book part
Publication date: 16 September 2014

Mian Wang and Yajing Feng

Special education in China has lagged behind regular education for many years, however, the past few decades, the government has made considerable efforts to develop and…

Abstract

Special education in China has lagged behind regular education for many years, however, the past few decades, the government has made considerable efforts to develop and improve the special education system. While the citizens of China have had a generic moral interest in disability since ancient times, the development of special education schools did not occur until American and European missionaries started schools for the visually and hearing impaired in the 19th century. The next major influence in the development of the special education system occurred with China’s Cultural Revolution in 1978. Interestingly, there is not any exclusive legislation on special education but in the 1980s, the government started Learning in Regular Classrooms (LRC), which is China’s version of inclusion. LRC has progressed rapidly the past two decades; however, the quality of instruction is low due to a lack of specialists, a shortage of personnel, inadequate funding, and limited technology as well as other barriers that are delineated in the chapter. The chapter emphasizes the government’s recent efforts in in-service teacher training, the preparation of preservice teachers, working with families, developing community rehabilitation training programs, and implementing evidence-based practices. Special education in China today is at a good place but it has quite a way from the ideal situation.

Details

Special Education International Perspectives: Practices Across the Globe
Type: Book
ISBN: 978-1-78441-096-4

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Book part
Publication date: 4 August 2014

Blake D. Mathias

Since March (1991) presented his ideas on organizational learning, hundreds of empirical tests have been conducted on relationships among the activities of exploration…

Abstract

Since March (1991) presented his ideas on organizational learning, hundreds of empirical tests have been conducted on relationships among the activities of exploration, exploitation, ambidexterity, and firm performance. Despite continued interest in his ideas, there has not been a systematic assessment of extant research to reveal whether, and to what extent, these activities relate to firm performance. This study uses meta-analysis to take a next step by aggregating results of 117 studies from more than 21,000 firms. I find strong performance effects for exploration and exploitation, but contrary to received theory, I discover ambidexterity yields weaker effects than a focus on either exploration or exploitation. Thus, I leverage these findings to offer future research opportunities.

Details

Exploration and Exploitation in Early Stage Ventures and SMEs
Type: Book
ISBN: 978-1-78350-655-2

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Book part
Publication date: 25 October 2014

Kymberly Drawdy, Meng Deng and Catherine Howerter

The chapter will address comparative teacher preparation programs for teachers who wish to teach in inclusive settings, including those in the United States and People’s…

Abstract

The chapter will address comparative teacher preparation programs for teachers who wish to teach in inclusive settings, including those in the United States and People’s Republic of China. Consideration will be given to developing course objectives and outcomes for teacher preparation programs through the alignment of teacher standards and content standards. Further, discussion will review assessing pre-service teacher candidates for inclusive settings. It will conclude with recommendations for inclusive teacher preparation programs.

Details

Measuring Inclusive Education
Type: Book
ISBN: 978-1-78441-146-6

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