Search results

This paper aims to propose a macro modeling approach to simulate the mechanical behavior and the failure of spot welded joints in structural crashworthiness computations.

A connector element is proposed to simulate the behavior and failure of spot weld joints. An elastic-plastic damageable model is used to describe the non-linear response and rupture. The connector model involves several parameters that have to be defined. Some are directly identified based on mechanical interpretations and experimental tests characteristics. The remaining parameters are identified through a finite element model updating approach using Arcan tests. Resulting from a sensitivity analysis, an original two steps optimization methodology, using the Modes I and II Arcan tests results sequentially, has been implemented to identify the remaining model parameters.

The numerical results for Arcan tests in mixed Modes I/II are in a good agreement with the experimental ones. The model is also validated on tensile pull-out, single lap shear and coach-peel tests.

By comparison with previous published results, the proposed model brings a significant improvement. The main innovative aspects of this work are as follows: the proposed formulation, a reduced number of parameters to optimize, an original sequential optimization methodology based on physical and mechanical analyses and a mesh size independent connector element.

The purpose of this paper is to evaluate the relative effects of three facets or connectors argued to be vital for learners in successful e-learning outcomes in developing economies.

Data were collected through a survey involving 130 learners. A stratified sampling technique was employed. Regression analyses making use of linear, multiple and PROCESS macro in Statistical Package for the Social Sciences (SPSS) were used to analyze data.

Technological self-efficacy and social presence are the most important facets needed by participants for effective learning in higher education institutions in developing countries. Learning tools meant to enhance teaching and learning and also contribute to learner satisfaction.

The findings of the study provide insights to academic administrators to pay close attention to the three connectors in order to ensure quality learning. The findings guide higher learning institutions to adequately and selectively pay attention to the three connections. Deliberate efforts focusing on students' situations, opinions and concerns are vital for learner satisfaction in developing economies.

This study represents a first attempt to examine the effect of the “right connections” for effective learning in developing economies, using a quantitative approach. The findings bring into attention the role of assessing learner inputs and virtual environment in boosting the effectiveness of e-learning. The findings also result in a model that should lead to increased learner satisfaction through the implementation of right connections. The study “disputes” the relevance of a universal e-learning system.

This paper aims to focus on two main and related issues: evaluating whether the required entrepreneurial capabilities are present according to Gladwell’s law of the few in the Western Negev region of Israel and identifying the economic development model that can generate a viral development.

In this paper, McClelland’s classification was used to evaluate the level of motivation in the region and Gladwell’s law of the few classification was used to understand the potentially positive effect of each entrepreneur on the others and on economic development in general. To evaluate the personal and business capabilities of each entrepreneur, two groups of parameters, one describing the personal profile and the other describing the business behavior of the entrepreneurs, were used.

Most entrepreneurs are ready to cooperate with the open incubator and to contribute to generating common business interest, but mavens and connectors have few of the required personal characteristics and business attitudes. Only the salesmen have the required personal profile, but they lack the necessary business attitude. Highly motivated entrepreneurs, at need-for-power level, have both the required personal profile and business attitude. They are the ones who could generate growth, and a portion of them have the characteristics to become mavens, connectors and salesmen.

The willingness to cooperate with a neutral organization and generate common economic interest is present in the Western Negev, but the following actions are required to achieve viral development: persuade and support entrepreneurs at the highest level of motivation to be a part of the few, i.e. mavens, connectors and salesmen; improve the business attitude of mavens, connectors and salesmen; and plan the work program of the open incubator in cooperation with entrepreneurs at the need-for-power level: mavens, connectors and salesmen.

Viral economic development can occur if the few mavens, connectors and salesmen in a given sector or region have the required positive personal profile and business attitude, and if most of the entrepreneurs are ready to cooperate with a neutral organization, the open incubator and join efforts with others to generate new common business interests.

The aspect‐oriented (AO) paradigm is first proposed to deal with programing modularity issues, but different researchers have been exploring AO concepts in the designing and definition of software systems. The goal of this paper is to discuss and present a proposal that addresses the application of AO concepts to the design of business processes (BPs) in order to improve usability and understandability of process models.

The paper departs from previous work on analyzing the application of AO for software design. The observations were backed by a case study, which was used to illustrate the issues by means of examples.

The paper presents findings on important issues related to the integration of AO paradigm and BP modeling, such as crosscutting representation, crosscutting composition, quantification, and join point exposure.

The paper explores a new frontier: the application of AO concepts to the design of BPs. As of now, few works have explored this new view on process modularity. The paper claims that application of AO concepts to the design of BPs is important in the consideration of usability and understandability. Its contributions are also backed by a prototype process editor, CrossOryx, a web‐based editor for modeling process using AO concepts.

As part of the portable product interconnects characterisation programme, the present investigation was conducted to determine the attachment integrity and long‐term reliability of Thin small Outline package (TSOP) solder joints. Accelerated thermal cycling combined with analytical modelling was used to evaluate the reliability for credit card sized DRAM memory cards. The measured solder joint fatigue lifetimes varied from 645 to 830 thermal cycles for TSOP‐II and I components, respectively. The modelling results corroborated the empirical findings. The solder joint thermal fatigue data were used to predict the card reliability under operating field conditions. The cards were found to be reliable for their intended use environment.

This paper aims to provide a qualitative country case study of The Netherlands, adopting the macro-institutional social enterprise (MISE) framework as developed by Kerlin (2009, 2013, 2017). The research question is twofold: How does the institutional context shape the social enterprise country model in The Netherlands, and To what extent can the MISE framework be a useful tool in explaining this dynamic between the institutional context and social enterprise country model?

This research applies the MISE framework developed by Kerlin (2017), which is founded upon the historical institutionalist approach.

The analysis of the institutional context in The Netherlands shows that the country context shares most traits with the autonomous diverse model. Its institutional environment should however be more enabling for the development of social enterprises. This discrepancy is explained through the notion of political will, resulting in the suggestion that the historical institutionalist approach of the MISE framework could be expanded by a greater focus on political will.

To investigate the Dutch social enterprise country model, this paper principally relies on external sources, including surveys (McKinsey, 2016; PwC, 2016; Social Enterprise NL, 2015; 2016; 2018). This is problematic due to its subjective nature, small population size used and potential conceptual misfit with the definitions used in this research.

For academia, this paper enhances the understanding of the relations between the institutional environment and social enterprise by adding a case study of The Netherlands to the body of research around the MISE framework. Furthermore, the paper suggests to enhance the historical institutionalist approach of the MISE framework with a greater focus on political will. For advocates of social enterprises in The Netherlands, including policymakers, this paper may add to their understanding of the current developments around social enterprise in The Netherlands and possibly enhance their effectiveness of advocating for policies that are conducive to the development of social enterprises.

This research is the first in applying a universally applicable theoretical framework to the context of The Netherlands. For scholars of social enterprise in The Netherlands, it provides a comprehensive overview of developments of social enterprise in the country over recent years, as well as a thorough analysis of the current state of affairs. For international scholars of social enterprise, this research provides a case of comparison with other countries, taking into account all main institutions that shape a country and social enterprise in that country. For scholars of the MISE framework, this research offers an additional country case study that further helps improve the framework.

Sales organizations embrace technological innovation. However, salespeople’s willingness to use new technology influences a firm’s return on investment, representing a significant concern for the organization. These concerns highlight tensions regarding the tradeoffs associated with technology implementations. The purpose of this study is to offer insights that help reduce the complexities of sales technology (ST) by exploring the changing dynamics of contemporary business relationships.

This paper synthesizes the ST literature using the service ecosystem perspective to propose the sales techno-ecosystem (STE) framework, providing new insights into organizational decision-making related to the ongoing digital transformation of sales tasks.

This synthesis of the ST literature with the service ecosystem seeks to clarify the impact of technology within the evolving nature of buyer–seller relationships by providing four unique perspectives.

Perspective 1 reviews the sales-service ecosystem framework and develops the theoretical underpinnings and relevant terminologies. Perspective 2 summarizes critical aspects of the ST literature and provides foundations for future research in the STE. Perspective 3 offers a more granular view, explicating roles and contexts prevalent in buyer–seller–technology interactions. Perspective 4 provides a set of tenets and advances research questions related to each tenet.

The culmination of these four perspectives is the introduction of five key tenants designed to help guide strategy and research.

The paper advances Hartmann et al. (2018) service ecosystem paradigm by explicating critical aspects of its ST domain to generate insights for theory and practice.

The purpose of this paper was to examine the definitions of global leadership and indigenous leadership, identify leadership capacities inherent in human resource development (HRD) and determine relationships of the three as a means to develop a model to aid and guide opportunities for future research.

Following a two-stage integrative literature review of HRD, global and indigenous leadership literature, the grounded theory constant comparative method established 31 positive and 1 negative leadership domains, and respective capacities, and compare domains from literature.

The Global Leadership Capacity Wheel informs researchers of strengths and areas for additional research, has resulted in a more complete model of global leadership and calls for increased clarity for leadership capacity model development, especially for complex, global environments and local constructs and theories.

Although the literature had adequate representation in the business and organizational acumen and managing people and relationships central global leadership domains, more research and reporting is required for managing self and indigenous leadership capacity development subdomains.

Leadership development is a high priority and core function of HRD. The Global Leadership Capacity Wheel provides a tool for scholars and practitioners to guide global leadership development programs and research.

Understanding the relationships of leadership capacities from global and indigenous perspectives is helpful to examine cultural, identity and macro-contextual dimensions and their influence on leadership.

The Global Leadership Capacity Wheel provides a type of road-map, a holistic representation, in the context of developing global leaders in today’s complex environment.

To provide a reinforced concrete model including bonding coupled to a classical continuum damage model of concrete, capable of predicting numerically the crack pattern distribution in a RC structure, subjected to traction forces.

A new coupling between bonding model and an alternative model for concrete cracking is proposed and analyzed. For concrete, proposes a damage‐like material model capable of combining two types of dissipative mechanisms: diffuse volume dissipation and localized surface dissipation.

One of the most important contributions is the capacity of predicting maximal and minimal spacing of macro‐cracks, even if the exact location of cracks remains undetermined. Another contribution is to reiterate on the insufficiency of the local damage model of concrete to handle this class of problems; much in the same manner as for localization problem which accompany strain‐softening behavior.

Bonding becomes very important to evaluate both the integrity and durability of a RC structure, or in particular to a reliable prediction of crack spacing and opening, and it should be integrated in future analysis of RC.

Shows that introduction of the influence of concrete heterogeneities in numerical analysis can directly affect the configuration of the crack pattern distribution. Use of a strong discontinuity approach provides additional cracking information like opening of macro‐cracks.