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In this paper we consider the design of a power system stabiliser using the least‐integral‐square‐error algorithm. Describing function technique is employed to take the nonlinearity of exciter saturation into account. Results, obtained from the digital simulation of a sample power system, show that the proposed power system stabiliser can greatly improve the dynamic stability of the power system.

Although corporate structures in Japan and, to a lesser extent Korea, have been examined in the literature, in most cases the framework is not comparative. In other cases the framework is comparative, with keiretsu and chaebol compared to US conglomerates. A third foreign conglomerate, the Mexican grupo, has thus far escaped much serious attention by scholars. Attempts to compare the structure of keiretsu, chaebol, and grupo in terms of the other. Aims to identify what can be learned from comparing foreign corporate structures with other foreign corporate structures, rather than with corporate structures in the USA.

Off-site manufacturing (OSM) is a modern method of construction that brings various environmental sustainability benefits for stakeholders. The increasing take-up of OSM in practice has attracted much research interest in its environmental sustainability. However, a holistic understanding of these previous research studies is still lacking. Therefore, the purpose of this paper is to critically review the existing body of knowledge regarding the environmental sustainability of OSM.

A qualitative content analysis was adopted to systematically and objectively review 55 related historical studies.

Three research themes were identified, including environmental sustainability assessment and performance, environmental sustainability strategies and critical environmental sustainability factors. A detailed discussion of the three themes was conducted to depict a whole picture of the current explorations in the research field. Additionally, a research framework was developed to articulate the interrelationship between the research themes and their specific research topics. Scientific research gaps were identified together with the future research directions in terms of sustainability strategies, performance impacting factors, sustainability indicators and drawbacks resulted from OSM application.

The literature review promotes construction stakeholders’ in-depth understanding about the environmental sustainability of OSM, which offers valuable implications for green industry practice. Additionally, it highlights the future research trends, which facilitates further explorations in the research area.

Human error is among the leading causes of construction-based accidents. Previous studies on the factors affecting human error are rather vague from the perspective of complex and changeable working environments. The purpose of this paper is to develop a dynamic causal model of human errors to improve safety management in the construction industry. A theoretical model is developed and tested through a case study.

First, the authors defined the causal relationship between construction and human errors based on the cognitive reliability and error analysis method (CREAM). A dynamic Bayesian network (DBN) was then developed by connecting time-variant causal relationships of human errors. Next, prediction, sensitivity analysis and diagnostic analysis of DBN were applied to demonstrate the function of this model. Finally, a case study of elevator installation was presented to verify the feasibility and applicability of the proposed approach in a construction work environment.

The results of the proposed model were closer to those of practice than previous static models, and the features of the systematization and dynamics are more efficient in adapting toward increasingly complex and changeable environments.

This research integrated CREAM as the theoretical foundation for a novel time-variant causal model of human errors in construction. Practically, this model highlights the hazards that potentially trigger human error occurrences, facilitating the implementation of proactive safety strategy and safety measures in advance.

The management of building information modeling (BIM)-enabled construction projects is challenging and unstructured in nature, particularly in terms of contract administration. Even though previous studies have revealed various legal issues related to BIM, little is known regarding the contractual practices of BIM. Hence, the purpose of this paper is to explore the contractual practices between the BIM consultant and employer in detail.

An explanatory case study was carried out on four large BIM-enabled construction projects in China.

The contractual practices differed from one project to another in terms of ownership and intellectual property rights (IPRs) of the BIM model, roles of the BIM consultant, liability of the BIM consultant in the event of errors and delays of the BIM model, and BIM-related costs and payments. Some of the interesting findings are as follows: the employer shall retain the ownership and IPRs of the BIM model, the BIM consultant shall provide a warranty to ensure usability of the BIM model after project handover, the BIM consultant shall pay for damages or losses if the BIM model fails to deliver and the costs of BIM implementation shall be borne by both contracting parties.

This study provides a fresh, realistic insight on the development of plausible contractual practices between the BIM consultant and employer and the findings can be used to improve BIM contract protocols in future projects.

The purpose of this paper is to propose and demonstrate a new additive manufacturing approach that breaks the layer-based point scanning limitations to increase fabrication speed, obtain better surface finish, achieve material flexibility and reduce equipment costs.

The freeform additive manufacturing approach conceptually views a 3D article as an assembly of freeform elements distributed spatially following a flexible 3D assembly structure, which conforms to the surface of the article and physically builds the article by sequentially forming the freeform elements by a vari-directional vari-dimensional capable material deposition mechanism. Vari-directional building along tangential directions of part surface gives surface smoothness. Vari-dimensional deposition maximizes material output to increase build rate wherever allowed and minimizes deposition sizes for resolution whenever needed.

Process steps based on geometric and data processing considerations were described. Dispensing and forming of basic vari-directional and vari-dimensional freeform elements and basic operations of joining them were developed using thermoplastics. Forming of 3D articles at build rates of 2-5 times the fused deposition modeling (FDM) rate was demonstrated and improvement over ten times was shown to be feasible. FDM compatible operations using 0.7 mm wire depositions from a variable exit-dispensing unit were demonstrated. Preliminary tests of a surface finishing process showed a result of 0.8-1.9 um Ra. Initial results of dispensing wax, tin alloy and steel were also shown.

This is the first time that both vari-directional and vari-dimensional material depositions are combined in a new freeform building method, which has potential impact on the FDM and other additive manufacturing methods.

This study investigates building information modelling (BIM) penetration in quantity surveying (QS) practice by examining the significance attached to the benefits and barriers of BIM adoption, BIM capabilities and future directions of BIM in QS processes. A popular opinion amongst construction researchers is that BIM has the capacity to revolutionize the industry. The study draws-out information in the literature regarding discipline-specific penetration of BIM.

Snowball sampling method was used to obtain information through a survey questionnaire. A total of 73 participants, largely quantity surveyors in Western Australia, took part in the study. Reductionist methodology was used to identify key variables of QS-BIM competencies that are most significant statistically.

BIM does not impose additional difficulties to traditional QS processes. Adherence to standard method of measurement and limited market demand do not hinder BIM deployment significantly. Quantity surveyors are able to use BIM to support their professional services once definitive design models are involved. In addition, the study identifies BIM penetration barriers to include constraints caused by centralised database management and interoperability issues, limitations imposed by market drivers, lack of in-house expertise to manage modelling needs and limited capability in software management.

Future opportunities for skill development are in the areas noted in the findings. Whilst many studies have reported resistance and widespread scepticism amongst some construction disciplines regarding BIM adoption, this study finds BIM penetration in QS practice is considerable, a direction that could trigger further novel innovations.

The methodology reported in the study is novel. In addition, findings from the study inspires other discipline-specific studies to articulate their BIM-penetration trends so that t broad areas of construction can develop a balanced strategy around BIM and innovation development.

Online games are prevalent internet applications and are known for satisfying the various needs of users. Nonetheless, little is known about whether online games could be a resort for users encountering workplace frustration. Explaining how workplace frustration and users' need satisfaction affect loyalty of online gamers, this study aims to formulate hypotheses and develop a framework based on the self-determination theory (SDT).

The authors use an online survey to collect 848 responses and use structural equation modelling to test the hypotheses.

The authors find that workplace frustration, autonomy need satisfaction and competence need satisfaction are positively related to online gamer loyalty. Moreover, workplace frustration enhances the link between competence need satisfaction and online gamer loyalty.

The authors are the first to use SDT to identify the three antecedents and the moderator of online gamer loyalty. Our findings offer a key message that game providers could design effective means to retain their gamers by understanding their gamers' workplace frustration and informing them that playing games could alleviate the associated negative feelings.

This paper aims to examine the effect of ownership structure and board gender diversity on charitable donations for a group of listed electronics companies in Taiwan.

Using linear regression analysis, this paper analyses the ownership structure, board gender diversity and charitable donations of 380 Taiwanese electronics companies (2011-2013).

While domestic institutional investors, such as domestic mutual funds and corporate investors, take more of agency logic view, it negatively impacts on charitable donations. However, the empirical findings of this paper indicate that board gender diversity with the critical number of female directors was positively related to charitable donation. Thus, it is clear that female directors reaching critical numbers were taking more of a stakeholder view of institutional logic, emphasizing the balance of interests of internal and external stakeholders.

This paper is limited to selected Taiwanese electronics companies over a two-year time frame, and charitable donations are the only proxy of corporate social responsibility (CSR) activity. The paper suggests that, as predicted by stakeholder theory and critical mass theory, companies with boards composed of at least three female directors make higher charitable donations.

This paper indicates that female directors on the board should have more voices on the board regarding the necessity and importance of CSR.

The paper contributes to existing literature by looking into the effects of ownership structure and board gender diversity on charitable donations.

Delays during construction are one of the common scenarios in the construction industry. The purpose of this paper is to identify the primary causes of delays in the construction phase of building construction projects in China.

Questionnaire survey approach was adopted across the four typical cities in China, namely, Beijing, Shanghai, Chongqing and Shenzhen. In total, 115 sets of valid responded questionnaires were collected and analyzed.

The results show that the causes of variations, delays in progress payments, exceptionally low bids and subcontractors’ poor performance and communication issues were the most important causes of delays in China.

This research is the first questionnaire survey on the causes of delays in the construction phase of building construction projects in China. The comparative analysis shows two unique causes of delays in the Chinese construction industry, such as “difficulty in claiming indemnity” and “unreasonable upfront capital demanded by client.” It also reveals different ranked causes of delays as per distinguished political and economic situations in China. The research findings can be referred by construction projects in other countries that are funded or partnered with China.