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A boundary integral technique is developed to study the free surface flow of a steady, two‐dimensional, incompressible, irrotational and inviscid fluid flow which is produced by two submerged sinks (or sources) which are of equal strength, placed along a solid horizontal boundary with a stagnation point on the free surface in a two layer stratified fluid in the presence of gravity. A special form of the Riemann‐Hilbert problem, namely the Dirichlet boundary problem, is applied in the derivation of the governing non‐linear boundary integral‐differential equations which are solved for the fluid velocity on the free surface and this involves the use of an interpolative technique and an iterative process. Results have been obtained for the free surface flow for various values of the Froude number and sink locations on the solid horizontal boundary and we have also studied the largest value of the Froude number for which no convergent solutions are possible, namely the critical Froude number. We have found that the free surface profile is dependent on two parameters, namely the Froude number on the free surface and the non‐dimensional distance between the two sinks.

Cities’ population growth goes in hand with the development of new technologies that are becoming the key factor of the Smart City (SC) concept. It allows the implementation of efficient management solutions, operation, and sustainable development of a city to face the challenges of urbanization and improve the services for the citizens and visitors.

The concept of the SC 5.0 was first presented in Svítek, Skobelev, and Kozhevnikov (2020), where the problems of the complexity of current cities due to rigid management processes, variety of infrastructure, and SC modules, systems, subsystems, and applications were described.

To prove the concept, several practical examples were developed to cover the topics: modeling in SCs, practical implementation of multiagent technologies, the approach of creating city ontology and the city knowledge base as the instrument of semantic interoperability, and visualization possibilities of Smart Evropská as a SC Testbed used for teaching purposes.

The new organizational structure is proposed based on knowledge graphs, and practical examples are shown. The applicability of knowledge graphs to be used in combination with data management platforms for monitoring SC key performance indicators (KPIs) and providing interoperability of services is presented.

Various approaches have emerged to assist practitioners in making more informed decisions in highway construction projects. However, industry practitioners are still using subjective ways to make decisions. Also, researchers have developed tools and techniques with similar objectives. Lack of information on what has been developed might lead to those issues. Therefore, this paper aims to review trends of evolution, pinpoint strengths and gaps in the literature and identifies potential future directions for decision-making research in highway construction projects.

A systematic review was conducted on published articles on decision-making in highway construction projects using the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) technique.

The analysis of 101 articles revealed that existing decision-making research in highway construction projects targets improvements in four areas: feasibility, conceptual, detailed scope and detailed design. The four areas consist of sixteen subthemes that are detailed in this study. In addition, most research involved developing decision support tools and systems as well as decision-making models, techniques and frameworks. Lastly, several research areas have emerged, such as adding more decision criteria including those with uncertainties, expanding existing decision-making models into decision support systems, benchmarking decision criteria between different sample populations and exploring inter-and intra-relationships between decision criteria.

This paper provides an overview of existing research on decision-making in highway construction projects. Also, it reveals research gaps in the body of knowledge to point out directions for future research. Finally, industry practitioners can use the findings to develop strategies for effective decision-making processes.

This study aims to calculate 2D free surface potential flow of a liquid poured from a container when the liquid runs along the underside of the spout.

The effect of surface tension is taken into consideration and gravity is neglected. The solutions for the free‐surface profiles were computed numerically using a boundary‐integral equation.

The numerical computation shows that the solutions are found for different values of α and a train of capillary waves in the far field for 4.16≤α<10.

No solutions were found for α<4.16.

The study provides an application of the use of cybernetic methodology to a practical problem.

The growing environmental awareness all through the world has motivated a standard change toward planning and designing better materials having good performance, which are very much suited to the environmental factors. The purpose of this study is to investigate the impact on mechanical, thermal and water absorption properties of sawdust-based composites reinforced by epoxy, and the amount of sawdust in each form.

Manufacturing of the sawdust reinforced epoxy composites is the main area of the research for promoting the green composite by having good mechanical properties, biodegradability or many applications. Throughout this research work, the authors emphasize the importance of explaining the methodology for the evaluation of the mechanical and water absorption properties of the sawdust reinforced epoxy composites used by researchers.

In this paper, a comprehensive review of the mechanical properties of sawdust reinforced epoxy composite is presented. This study is reported about the use of different Wt.% of sawdust composites prepared by different processes and their mechanical, thermal and water absorption properties. It is studied that after optimum filler percentage, mechanical, thermal properties gradually decrease, but water absorption property increases with Wt.% of sawdust. The changes in the microstructure are studied by using scanning electron microscopy.

The novelty of this study lies in its use of a systematic approach that offers a perspective on choosing suitable processing parameters for the fabrication of composite materials for persons from both industry and academia. A study of sawdust reinforced epoxy composites guides new researchers in the fabrication and characterization of the materials.

This paper aims to solve the web service selection problem using an efficient meta-heuristic algorithm. The problem of selecting a set of web services from a large-scale service environment (web service repository) while maintaining Quality-of-Service (QoS), is referred to as web service selection (WSS). With the explosive growth of internet services, managing and selecting the proper services (or say web service) has become a pertinent research issue.

In this paper, to address WSS problem, the authors propose a new modified fruit fly optimization approach, called orthogonal array-based learning in fruit fly optimizer (OL-FOA). In OL-FOA, they adopt a chaotic map to initialize the population; they add the adaptive DE/best/2mutation operator to improve the exploration capability of the fruit fly approach; and finally, to improve the efficiency of the search process (by reducing the search space), the authors use the orthogonal learning mechanism.

To test the efficiency of the proposed approach, a test suite of 2500 web services is chosen from the public repository. To establish the competitiveness of the proposed approach, it compared against four other meta-heuristic approaches (including classical as well as state-of-the-art), namely, fruit fly optimization (FOA), differential evolution (DE), modified artificial bee colony algorithm (mABC) and global-best ABC (GABC). The empirical results show that the proposed approach outperforms its counterparts in terms of response time, latency, availability and reliability.

In this paper, the authors have developed a population-based novel approach (OL-FOA) for the QoS aware web services selection (WSS). To justify the results, the authors compared against four other meta-heuristic approaches (including classical as well as state-of-the-art), namely, fruit fly optimization (FOA), differential evolution (DE), modified artificial bee colony algorithm (mABC) and global-best ABC (GABC) over the four QoS parameter response time, latency, availability and reliability. The authors found that the approach outperforms overall competitive approaches. To satisfy all objective simultaneously, the authors would like to extend this approach in the frame of multi-objective WSS optimization problem. Further, this is declared that this paper is not submitted to any other journal or under review.

This study aims to provide empirical findings of the extent to which the ambidexterity found in innovation and social networks will mediate the relationship between entrepreneurial orientation (EO) and firm performance (FP). This study also compares the ambidextrous strategy between the balanced dimension (BD) and combined dimension (CD) and examines their contribution to the small- and medium-sized enterprises (SMEs’) performance.

The current study used an explanatory research design by surveying a total of 205 fashion firms’ owners/managers in Yogyakarta, Indonesia, using a semi-structured questionnaire. Path analysis with mediating tests and independent t-tests were used.

The results revealed that innovation and social network ambidexterity mediate the relationship between EO and the SMEs’ performance. One ambidextrous strategy, the BD strategy, is superior to the CD one. The study makes an interesting discovery: the CD strategy apparently dominates FP when EO does not exist.

The study suggests that no ambidextrous strategy (i.e. BD and CD) used by the SMEs can fit all situations. In detail, the study provides four different strategies for SMEs to build organizational ambidexterity, namely, innovate and sustain; elevate; expand; and collaborate and survive. It is also suggested that the SMEs consider two main principles when dealing with an ambidextrous strategy, “anything that is too much is not always good” and “one size does not fit all.” By doing so, the SMEs are expected to be able to use internal and external resources and choose the most appropriate ambidextrous strategy to respond to the relevant situation (e.g. the changes of consumer behavior due to the COVID-19 pandemic).

Using a dynamic capability approach by integrating two perspectives, i.e. the internal (resource-based theory) and external (resource-dependency theory) perspectives, makes the study relevant and valuable to better understand the role and type of ambidexterity among SMEs as a mediating factor between EO and FP. This paper breaks new ground by confirming a paradoxical phenomenon concerning organizational ambidextrous practices within SMEs. Additionally, four strategies for ambidextrous were developed to respond to the anomaly.

This paper offers innovative strategies on how small- and medium-sized enterprises (SMEs) can respond to the COVID-19 crisis by incorporating an entrepreneurial orientation concept corresponding to the nature of the environmental shock.

This paper conceptualises a solution by elaborating three critical items, namely entrepreneurial orientation, adaptive process and strategy types as key factors to develop the framework solution. This paper outlines a strategy proposal for SMEs to respond to the crisis.

The environmental factor represents the crisis, which leads to a degree of innovation, i.e., radical and incremental, and can be approached using an adjusted adaptive consolidation process from Child. This paper identifies four strategy options from Miles and Snow to respond to the crisis; i.e. (1) defender–exploitative innovation; (2) analyser–organisational ambidexterity; (3) prospector–exploratory innovation and (4) reactor–abandon or shut down the business.

While most of the suggestions from previous COVID-19-related works are acknowledged, this paper brings more insight from an academic perspective, specifically organisational theory, to cope with the pandemic crisis. The steps and strategy to be chosen can guide policymakers to decide what is their best move to respond to this crisis. In addition, the proposed strategies call for future research to provide empirical evidence by exploring and examining various scenarios in different kinds of businesses.

This study aims to examine the relationship between Achievement Motivation (AM), Smart Work (SW), and human resources (HR) performance. It questions how moral global leadership (MGL) could moderate the relationship between AM, SW, and HR performance. A theoretical model was developed and tested on sample data representing 219 employees, educators, and educational staff of Islamic Higher education (IHE). The data were collected through surveys and applied to structural equation modeling using SEM-PLS. This study found that AM and SW significantly affect HR performance. While MGL substantially moderates the relationship between AM, SW, and HR performance. This study contributes to the literature on MGL, AM, and SW in creating HR performance that has yet to be studied so far. This study offers the concept of MGL, which plays a central role in moderating the relationship between AM, SW, and HR performance.

This study aims to examine the dynamics of traditional wayang kulit or shadow puppet knowledge management in a community-based enterprise (CBE) known as “Wisata Wayang” in Wukirsari Village, Yogyakarta, Indonesia.

A qualitative case study was adopted, which allows the author to explore the dynamics or uniqueness of an event or cultural phenomenon more deeply.

The shadow puppet is an artefact of Javanese culture with rich life philosophy and wisdom. It guides people the pursuit of harmony with themselves, others, the universe and God. The success of knowledge management of the shadow puppet at CBE was supported by the high entrepreneurial orientation of the administrators. This study showed that entrepreneurial orientation should be extended into sociopreneurial with additional aspects, including preservation mission and communality, promoting the emergence of grassroots innovations. The knowledge of shadow puppet craft in this village is passed through nyantrik, also known as apprenticeship.

No previous research has explored the dynamics of traditional knowledge management in the context of CBE in Indonesia. As Indonesia has rich traditional knowledge from hundreds of tribes and prominent communal cultures, this study of community-based knowledge management contributes new insights in the knowledge management literature.