Search results
1 – 10 of 102Jakub Šejna, Patrik Dobrovolný and František Wald
This paper provides a summary of the issues in the passive fire protection of steel structures. Types of passive fire protection and the material properties of protection members…
Abstract
Purpose
This paper provides a summary of the issues in the passive fire protection of steel structures. Types of passive fire protection and the material properties of protection members and steel members are described. The paper deals with the possibility of partial fire protection for secondary steel beams, in cases where, due to possible membrane action, it is not necessary to apply passive protection to the entire beams.
Design/methodology/approach
Studies of partially fire-protected steel structures are compared, and results from studies with different input data are summarized. A fire experiment was conducted to investigate the effect of partial passive protection in a small-scale furnace. Based on the findings of the experiment, numerical models were prepared using Ansys Mechanical.
Findings
The results are summarized, and a partial fire protection length of 500 mm is recommended. Various partial fire protection lengths were compared, and the temperature development of the steel contactors was compared using a protection length of 500 mm. At the end of the paper, options for partial passive protection of steel beams are presented.
Originality/value
Extended paper from ASFE2021 based on selection.
Details
Keywords
Yuqi Liu, Junqiang Su, Xinyu Li and Guoqing Jin
The garment industry will be one of the major beneficiaries of advances in smart manufacturing, as it is highly labor-intensive and heavily depends on labor force. Manipulating…
Abstract
Purpose
The garment industry will be one of the major beneficiaries of advances in smart manufacturing, as it is highly labor-intensive and heavily depends on labor force. Manipulating robots in human environments has made great strides in recent years. However, the main research has focused on rigid, solid objects and core capabilities such as grasping, placing remain a challenging problem when dealing with soft textiles. The experimental results indicate that adopting the proposed bionic soft finger will provide garment manufacturers with smart manufacturing capabilities. Then, the purpose of this paper is to utilize the flexibility of the soft finger to transfer fabric layer by layer without damage in garment automation.
Design/methodology/approach
In this paper, a new way to separate layer by layer pieces of fabric has been inspired by the rise of soft robotics and their applications in automation. Fabric gripping is accomplished by wiping deformation and pinching the fabric. A single fabric piece is separated from cutting pile by the soft finger in four steps: making an arch by pressing, wiping deformation, grasping and separating, and placing.
Findings
The case study demonstrated that the soft finger arrangement for automated grasping of fabric pieces of a garment can be successfully applied to delicate fabric. A combination of cloth shape and weight determines the number of soft fingers. In addition, the soft finger was tested on different types of fabrics to determine its performance and application capabilities. The technology may be used to produce clothing intelligently in the future, such as intelligent stacking, intelligent transportation and intelligent packaging, to increase clothing industry productivity.
Originality/value
An industrial bionic soft finger gripping system is proposed in this paper for application in the field of fabric automatic manipulation. A piece of fabric could be picked up and released layer by layer from a stack by the proposed gripper without creating any damage to it. Soft grippers have the right proportion of softness and rigidity like a human being. A soft finger has a potential affinity for soft materials such as fabrics without damaging either their surface or their properties.
Details
Keywords
Venkatesan V., Shanmugam S. and Veerappan A.R.
This paper aims to present the numerical analysis of displacements, forces and bend angles of three different structural designs of a soft actuator using the finite element…
Abstract
Purpose
This paper aims to present the numerical analysis of displacements, forces and bend angles of three different structural designs of a soft actuator using the finite element method. The results of this analysis help understand the physical behavior of the soft pneumatic actuator.
Design/methodology/approach
The soft actuator is designed using commercial modeling software, and the design of the actuator is analyzed using ABAQUS 19.0 with a standard implicit nonlinear analysis. There are three types of structural designs for actuators, namely, rectangular-base model, trapezoidal-base model and the trapezoidal model considered in the present study.
Findings
Maximum displacement, force and bend angle are observed in the rectangular-base model at various pressure levels.
Originality/value
The development of novel designs of the soft pneumatic actuator to undertake a comparative analysis of displacement, force and bend angle.
Details
Keywords
Chang Chen, Yuandong Liang, Jiten Sun, Chen Lin and Yehao Wen
The purpose of this paper is to introduce a variable distance pneumatic gripper with embedded flexible sensors, which can effectively grasp fragile and flexible objects.
Abstract
Purpose
The purpose of this paper is to introduce a variable distance pneumatic gripper with embedded flexible sensors, which can effectively grasp fragile and flexible objects.
Design/methodology/approach
Based on the motion principle of the three-jaw chuck and the pneumatic “fast pneumatic network” (FPN), a variable distance pneumatic holder embedded with a flexible sensor is designed. A structural design plan and preparation process of a soft driver is proposed, using carbon nanotubes as filler in a polyurethane (PU) sponge. A flexible bending sensor based on carbon nanotube materials was produced. A static model of the soft driver cavity was established, and a bending simulation was performed. Based on the designed variable distance soft pneumatic gripper, a real-time monitoring and control system was developed. Combined with the developed pneumatic control system, gripping experiments on objects of different shapes and easily deformable and fragile objects were conducted.
Findings
In this paper, a variable-distance pneumatic gripper embedded with a flexible sensor was designed, and a control system for real-time monitoring and multi-terminal input was developed. Combined with the developed pneumatic control system, a measure was carried out to measure the relationship between the bending angle, output force and air pressure of the soft driver. Flexible bending sensor performance test. The gripper diameter and gripping weight were tested, and the maximum gripping diameter was determined to be 182 mm, the maximum gripping weight was approximately 900 g and the average measurement error of the bending sensor was 5.91%. Objects of different shapes and easily deformable and fragile objects were tested.
Originality/value
Based on the motion principle of the three-jaw chuck and the pneumatic FPN, a variable distance pneumatic gripper with embedded flexible sensors is proposed by using the method of layered and step-by-step preparation. The authors studied the gripper structure design, simulation analysis, prototype preparation, control system construction and experimental testing. The results show that the designed flexible pneumatic gripper with variable distance can grasp common objects.
Details
Keywords
Jeffrey S.S. Cheah, Qinni Yeoh and Yanto Chandra
This study aims to examine the influences of causation strategy, entrepreneurial orientation and social orientation on the social enterprise’s (SE) financial performance and…
Abstract
Purpose
This study aims to examine the influences of causation strategy, entrepreneurial orientation and social orientation on the social enterprise’s (SE) financial performance and social achievement.
Design/methodology/approach
The partial least square structural equational modelling technique was used to analyse survey data collected from Malaysian and Singaporean SEs (n = 96).
Findings
The findings have important guidance for policymakers, social entrepreneurs and researchers interested in promoting the growth and impact of SEs in emerging regions.
Practical implications
This study offers several practical implications for social entrepreneurs who want to achieve both financial and social success.
Originality/value
There is no widely accepted performance framework for SE. Most research in SE is descriptive and conceptual in nature. Larger data sets from the nascent ecology of SE are even scarcer. This study developed and examined a performance framework specifically designed to meet the needs of SEs operating in the emerging region.
Details
Keywords
Wei Sun, Chengyixue Huang and Zhongfeng Su
While the relationship between non-family CEOs and corporate innovation in China has been widely studied, the results remain inconclusive. This study explores the relationship…
Abstract
Purpose
While the relationship between non-family CEOs and corporate innovation in China has been widely studied, the results remain inconclusive. This study explores the relationship between non-family CEOs and corporate innovation in the context of intergenerational succession. It considers the background and background characteristics of non-family CEOs in an attempt to provide a theoretical foundation for human resource management and innovative strategic management that can be applied in the transformation of family companies.
Design/methodology/approach
The authors develop, then test, a series of hypotheses using an econometric analysis of a large sample of Chinese listed family firms. To control for endogeneity problems, such as missing variables in the model and the selectivity bias of the sample, propensity score matching (PSM) model is applied to analyze the panel data of 452 listed family firms from 2009–2019.
Findings
This study first validates the mechanism by which non-family CEO background characteristics affect innovation performance in family firms. It then reveals the varying moderating effects of two stages of intergenerational succession (i.e. later-generation participation in management and later-generation take-over management) that influence the relationship between non-family CEOs and corporate innovation.
Originality/value
The study's findings based on upper echelon and imprinting theory complement and extend existing research by revealing the impact of non-family CEOs from different backgrounds, and also identifying the role of intergenerational succession in the relationship between non-family CEO background characteristics and innovation performance.
Details
Keywords
Ronaldo Gomes Dultra-de-Lima and Luiz Artur Ledur Brito
The absorptive capacity (AC) leads to firm performance and influences the development and evolution of capabilities and routines, but the influence of AC in projects remains…
Abstract
Purpose
The absorptive capacity (AC) leads to firm performance and influences the development and evolution of capabilities and routines, but the influence of AC in projects remains unclear. Therefore, this study aims to investigate the effect of AC on project performance (PP) in the construction industry of Sao Paulo State, Brazil.
Design/methodology/approach
The authors conducted a survey questionnaire with project managers and collected 157 responses in the construction sector. They also used confirmatory factor analysis (CFA) and multiple linear regression techniques to assess the data.
Findings
The study provides empirical evidence that realized absorptive capacity (RAC) has a direct and indirect positive effect on PP. Conversely, the potential absorptive capacity (PAC) only indirectly impacts PP through project management practices (PMPs). PAC and RAC positively influence PMPs that in turn positively influence PP. The findings reinforce the relevance of AC to the development of internal knowledge for processes and routines, thereby enhancing PP.
Practical implications
The findings provide practical implications: the AC influences PP by refining and adapting routines. Moreover, the consistent application of accepted practices is not enough for PP, but the ability to adapt, adjust and transform the relevant knowledge into routines.
Originality/value
This paper provides empirical evidence that the knowledge application of PMPs improves organizational performance through PP. However, despite what the literature has discussed, this paper proved that AC has no effect as a moderating factor between PMPs and performance; however, AC's role significantly impacts PP through PMPs.
Details
Keywords
Wen-Lung Shiau, Hao Chen, Zhenhao Wang and Yogesh K. Dwivedi
Although knowledge based on business intelligence (BI) is crucial, few studies have explored the core of BI knowledge; this study explores this topic.
Abstract
Purpose
Although knowledge based on business intelligence (BI) is crucial, few studies have explored the core of BI knowledge; this study explores this topic.
Design/methodology/approach
The authors collected 1,306 articles and 54,020 references from the Web of Science (WoS) database and performed co-citation analysis to explore the core knowledge of BI; 52 highly cited articles were identified. The authors also performed factor and cluster analyses to organize this core knowledge and compared the results of these analyses.
Findings
The factor analysis based on the co-citation matrix revealed seven key factors of the core knowledge of BI: big data analytics, BI benefits and success, organizational capabilities and performance, information technology (IT) acceptance and measurement, information and business analytics, social media text analytics, and the development of BI. The cluster analysis revealed six categories: IT acceptance and measurement, BI success and measurement, organizational capabilities and performance, big data-enabled business value, social media text analytics, and BI system (BIS) and analytics. These results suggest that numerous research topics related to big data are emerging.
Research limitations/implications
The core knowledge of BI revealed in this study can help researchers understand BI, save time, and explore new problems. The study has three limitations that researchers should consider: the time lag of co-citation analysis, the difference between two analytical methods, and the changing nature of research over time. Researchers should consider these limitations in future studies.
Originality/value
This study systematically explores the extent to which scholars of business have researched and understand BI. To the best of the authors’ knowledge, this is one of the first studies to outline the core knowledge of BI and identify emerging opportunities for research in the field.
Details
Keywords
Karen Ramos and Onesimo Cuamea
The purpose of this study is to find out the factors that influence dental travelers’ revisit intention (RI) to Tijuana, Mexico.
Abstract
Purpose
The purpose of this study is to find out the factors that influence dental travelers’ revisit intention (RI) to Tijuana, Mexico.
Design/methodology/approach
Based on the push and pull model, five constructs were included: quality service, price, supporting services, cultural proximity and quality information. The information was obtained by applying an online survey to a sample of 384 dental tourists in Tijuana, Mexico, who were repeat patients of a dental clinic in Tijuana after the COVID-19 pandemic. Exploratory factor analysis, average variance explained and composite reliability were conducted to ensure the validity of each construct. Multiple regression analysis was done to identify predictors of travelers’ RI.
Findings
The results obtained show that cultural proximity, quality service, price and supporting services influenced the travelers’ revisit behavior after the COVID-19 pandemic lockdowns.
Originality/value
This study contributes to the body of knowledge on travel behavior in dental tourism after the COVID-19 pandemic lockdowns, which has been scarcely studied. Also, RI was analyzed, focusing on repeated travelers to propose a model mainly for borders or frontiers where developed and developing countries co-exist and interact.
Details
Keywords
This study aims to investigate the impact of equity ownership structure (i.e. CEO ownership, board chair ownership and institutional ownership) on internationalization of firms…
Abstract
Purpose
This study aims to investigate the impact of equity ownership structure (i.e. CEO ownership, board chair ownership and institutional ownership) on internationalization of firms. The moderating role of international experience of board chairs is also examined.
Design/methodology/approach
This study uses Compustat-Capital IQ data from Standard &Poor’s. The sample of this study includes 309 US multinational corporations representing different sectors. The parameters were estimated by using the ordinary least squares regression with the SPSS statistical package.
Findings
The finding of this study suggests that CEO ownership and board chair ownership have a significant, positive impact on the degree of internationalization of firms, whereas institutional ownership has a negative impact. The predicted moderating role of international experience of board chairs has found mixed results.
Originality/value
This study contributes to the literature by taking a holistic approach to examine the impact of equity ownership types (i.e. CEO ownership, board chair ownership and institutional ownership) on firms’ degree of internationalization. To the best of the authors’ knowledge, this research is also the first to investigate the impact of independent board chairs’ equity ownership and international experience on internationalization.
Details