Search results

In the present work a rigid‐plastic finite element formulation using a dynamic explicit time integration scheme is proposed for numerical analysis of sheet metal forming processes. The rigid‐plastic finite element method, based on membrane elements, has long been employed as a useful numerical technique for the analysis of sheet metal forming because of its time effectiveness. The explicit scheme, in general, is based on the elastic‐plastic modelling of material requiring large computation time. The resort to rigid‐plastic modelling would improve the computational efficiency, but this involves new points of consideration such as zero energy mode instability. A damping scheme is proposed in order to achieve a stable solution procedure in dynamic sheet forming problems. In order to improve the drawbacks of the conventional membrane elements, BEAM (abbreviated from Bending Energy Augmented Membrane) elements, are employed. Rotational damping and spring about the drilling direction are introduced to prevent a zero energy mode. The lumping scheme is employed for the diagonal mass matrix and linearizing dynamic formulation. A contact scheme is developed by combining the skew boundary condition and a direct trial‐and‐error method. Computations are carried out for analysis of complicated sheet metal forming processes such as forming of an oilpan and a front fender. The numerical results of explicit analysis are compared with the implicit results, with good agreement, and it is shown that the explicit scheme requires much shorter computational times, especially when the problem becomes more complicated. It is thus shown that the proposed dynamic explicit rigid‐plastic finite element enables an effective computation for complicated sheet metal processes.

This paper gives a review of the finite element techniques (FE) applied in the area of material processing. The latest trends in metal forming, non‐metal forming, powder metallurgy and composite material processing are briefly discussed. The range of applications of finite elements on these subjects is extremely wide and cannot be presented in a single paper; therefore the aim of the paper is to give FE researchers/users only an encyclopaedic view of the different possibilities that exist today in the various fields mentioned above. An appendix included at the end of the paper presents a bibliography on finite element applications in material processing for 1994‐1996, where 1,370 references are listed. This bibliography is an updating of the paper written by Brannberg and Mackerle which has been published in Engineering Computations, Vol. 11 No. 5, 1994, pp. 413‐55.

Arguing that it is necessary to look into specific global leadership processes in specific contexts, this article focuses on collective global leadership in self-managed multicultural teams using an input-process-output model. Building on a study of nationally and culturally diverse self-managed teams, our work demonstrates that collective global leadership in these teams is critical for team performance (output). Our study also examines some of the affective or attitudinal antecedents of collective global leadership in self-managed multicultural teams (process) and their members’ goal orientations (input). Our findings suggest that a team learning orientation may greatly help multicultural teams overcome the liability of cultural diversity, create a positive intra-team environment, and enable collective global leadership. Our research also suggests that team performance orientation moderates the above effects.

The change in Malaysian financial environment can be attributed to digitalization as banks are racing to digital maturity by 2020. Historically in Malaysia, the use of credit card was a Fintech development in the 1950s to help Malaysians minimize the burden in carrying cash all the time. The aim of financial technology in the 1990s was to encourage bank customers to use the online banking system instead of only automated teller machine. Fintech services are swiftly interrupting banks' services globally. Similarly, Malaysia's banking sector is experiencing the interruption since as more Fintech organizations are innovating new Fintech service to improve convenience for clienteles. Numerous regulatory agencies in Malaysia and the Malaysian government have set up several initiatives to encourage and provide a vigorous growth in the Malaysian Fintech and digital asset regulatory environment. Expectation Confirmation Model, Technology Acceptance Model, and Cognitive Model are viewed as the most popular frameworks that discuss the continuous intention to use information system. The combination of these three models has led to the creation of Technology Continuance Theory (TCT). TCT postulates that five prominent constructs or antecedents are depicted as key indicators in explaining the users' intentions for continuous use: (1) confirmation, (2) perceived usefulness, (3) perceived ease of use, (4) satisfaction, and (5) attitude. Furthermore, TCT adds to the argument on the consumers' continuance adoptions by assimilating satisfaction and attitude into a single construct.

Our understanding of leadership has undergone a significant shift in the early part of the 21st century. An emerging perspective, dubbed Eco-Leadership, suggests leadership is a collective process involving both leaders and followers co-creating leadership. Because our beliefs and attitudes toward leadership affect how we lead, it becomes crucial to better understand the views youth have towards leadership, as they develop into our future leaders, to improve curricula and instruction. In this study, no relationship was found between youth attitudes and beliefs towards systemic and hierarchical thinking with respect to their preferred problem-solving style. These findings indicate youth may adaptively or innovatively associate leadership equally through systemic and hierarchical thinking. Further, neither being more adaptive nor more innovative implies one to be better at leading.

The purpose of this paper is to provide a method that can better evaluate the credit risk (CR) under PPP project finance.

The principle to evaluate the CR of PPP projects is to calculate three critical indicators: the default probability (DP), the recovery rate (RR) and the exposure at default (EAD). The RR is determined by qualitative analysis according to Standard & Poor’s Recovery Scale, and the EAD is estimated by NPV analysis. The estimation of the DP is the focus of CR assessment because the future cash flow is not certain, and there are no trading records and market data that can be used to evaluate the credit condition of PPP projects before financial close. The modified CreditMetrics model and Monte Carlo simulation are applied to evaluate the DP, and the application is illustrated by a PPP project finance case.

First, the proposed method can evaluate the influence of the project’s cash flow uncertainty on the potential loss of the bank. Second, instead of outputting a certain default loss value, the method can derive an interval of the potential loss for the bank. Third, the method can effectively analyze how different repayment schedules and risk preference of banks influence the evaluating result.

The proposed method offers an approach for the bank to value the CR under PPP project finance. The method took into consideration of the uncertainty and other characteristics of PPP project finance, adopted and improved the CreditMetrics model, and provided a possible loss range under different project cash flow volatilities through interval estimation under certain confident level. In addition, the bank’s risk preference is considered in the CR evaluating method proposed in this study where the bank’s risk preference is first investigated in the CR evaluating process of PPP project finance.

Shared leadership is increasingly important in today's organizations. The purpose of this paper is to examine the association between shared leadership and team performance, the moderating role of demographic diversity and the mediating role of information sharing on this relationship.

The research used a field study design, quantitative data of employees from two different organizations. Data were analyzed with structural equation modeling analyses.

Shared leadership was positively associated with team performance and this association was mediated by information sharing. Demographic diversity moderated the relationship between shared leadership and team performance, such that shared leadership was more strongly associated with team performance in more diverse teams and less in less diverse teams.

The results found support for moderating and mediating variables, explaining under what conditions and how shared leadership is associated with team performance in organizations.

The findings highlight the importance of nurturing shared leadership, in particular as teams tend to grow more diverse in our todays’ work settings. They also highlight the importance of diversity in how shared leadership unfolds its potential.

The research highlights that shared leadership, diversity, and information are increasingly important in today's organizations and should be considered from a more positive standpoint.

This research explored the association between shared leadership, demographic diversity, and information sharing with team performance. It represents a first step in examining the moderating and mediating variables of the shared leadership and team performance association.