Search results

The process of creating complex models often requires different modelling methods and tools to be integrated. This paper provides a concise description of an object‐oriented environment for creating composite models. The proposed approach is based on using simulation abstractions as basic model building blocks. The basic environment is built up of a Prolog interpreter, SIMLIB and object‐oriented Petri nets.

Global Mindset (GM) is a multifaceted construct that has received broad interest among practitioners and academics. It is a fragmented construct at this point in time, due to definitional overlap with other constructs such as global leadership and cultural intelligence. This overlap has created complexity for research that attempts to understand GM in isolation. Lack of clear boundaries in defining and conceptualizing this construct challenges researchers who are attempting to capture fully what constitutes GM. Our work seeks to better understand and explain what underlines the individual GM construct and how does this impact the development of global competencies in individual managers.

We systematically review and analyze the individual GM literature thematically to provide an overview of the extant research from a broad array of scholarly sources dating from 1994 to 2017. Our work offers a thematic analysis that provides a visual guide to GM by tracking the corpus of individual-level GM studies. We categorize the research according to its theoretical groundings and basic concepts and proceed review how GM has been operationalized at the individual level and measured. Next, we integrate major dimensions in the GM research and propose a framework to enhance understanding of the phenomenon. Finally, we discuss the implications of our review for the development of GM for practitioners, coaches and trainers.

Given the importance of image matching as a rationale for sponsorship investment, this paper examines the extent to which image matching occurs in U.S. intercollegiate athletics. Utilizing student-athlete education and athletic program ethics as image dimensions, while controlling for winning, the authors find that individual corporations tend to sponsor athletic programs that project very different images. The authors then prescribe an approach that prospective sponsors could use to determine appropriate image matches.

This paper aims to provide an overview of current and historical arcjet development. The reviewed arcjets are considered with respect to both design and thruster relevant parameters. Correspondingly, the paper enables the identification of adequate design criteria and of the probable thruster parameters.

The approach consists of a database for thruster relevant parameters in conjunction with relevant operational requirements (such as type of propellant) and specific design criteria (such as e.g. propellant injection systems).

The synopsis of both operational parameter and respectively assigned design allows for the derivation of development approaches for arcjets under given high level requirements such as power regime.

The paper is a general review. However, its strength is in the synthesis of the arcjet classification, the functional evidence of design criteria and the application scenario.

Not only basic but also specific design criteria are analyzed and evaluated leading to a recommendation feature of the paper with respect to the overall design of adequate arcjets.

Within the scope of the Clean Space initiative, new applications and scenarios from the operation of arcjets arise enabling EOL phases of spacecraft that fulfill respective levels of debris mitigation and, in addition, the requirements concerning the adequately adapted re-entry of spacecrafts that are at end of life.

The paper is a general review. However, its strength is in the synthesis of the arcjet classification, the functional evidence of design criteria and the application scenario.

Vending machines (VMs) provide quick access for snack foods and beverages for students during their study days. These vended foods have been reported to affect the student's nutritional status and contributing to obesity by increasing the caloric intake. This study aimed to evaluate the nutritional value of snacks and beverages provided by VM at the university campuses.

A cross-sectional observational study in one large urban university with four campuses was conducted. In total, 55 VMs were found distributed over 50 buildings of the four university campuses. Of the vending slots surveyed, only 57 snacks and beverage food items were found repeated. These items were vended and analyzed using nutrient databases, and their nutritional quality was assessed using nutrient adequacy ratio and nutritional quality score.

Most vended snacks were salty (77%) and sweet (23%). Neither snacks nor beverages were nutrient-dense, and the majority (65%) of snacks and beverages were calorie-dense, with high contents of sugar, sodium and saturated fat; while they were low in vitamins C and A, calcium, iron, sodium, protein and dietary fibers. None of the vended beverages met the low calorie, low sugars and high-fiber criteria.

One limitation of the current work is represented in the fact that VM snacks and beverages are not fixed throughout the year days, and exposed to continuous changes, depending on the customers' attitudes and economic and financial considerations related to the operating contractor company and the customer students. Thus, a continuous, long-term evaluation is suggested to be conducted for a more representative and reflective evaluation of the nutritional quality of vended snacks and beverages.

Poor nutritional quality has been found for vended foods. Healthier food options should be provided to improve students' dietary intake.

Attention has to be directed toward the nutritional quality of VM foods, and how to provide adolescents and young adults with healthy options.

This is the first study conducted in the United Arab Emirates (UAE) and Gulf Cooperation Council countries (GCC) assessing the nutritional value of vending machine foods in university settings.

Global leadership research published in the form of journal articles, scholarly book chapters, and theses and dissertations from 2015 to 2020 are tabulated to ascertain patterns in the field regarding the quantity of publication in the field, type of research being conducted, authorship patterns, type of theory that is utilized, and linkages of research to related phenomena. We compare our findings to previous research and discuss implications for the future evolution of the global leadership field.

This paper aims to describe the popular trends and methods and ICT tools used for mapping and visualization of scientific domains as a research methodology which is attracting more and more interest from scientific information and science studies professionals. Science mapping or bibliometric mapping is a spatial representation of how disciplines, fields, specialties and individual documents or authors. The researchers analysed Bibexel, Pajek, VOSViewer, programmes used for processing and visualization of bibliographic and bibliometric data, within the framework of the implementation of IRNet research network project and activities and presented several examples of visualisation.

Among the main indicators of research effectiveness – bibliometric indicators – is a powerful information tool to support the development of science. Practical research methods were prepared using the programs: Bibexel (metadata analyses), program Pajek: graph editing and visualization of the graph structure of co-authorship – using the method of Kamada-Kawai and VOSviewer: a computer program for creating maps based on network data and for visualizing and exploring these maps. The main features of VOSviewer can be summarized for creating maps based on network data, visualizing and exploring maps.

The cited references and keywords are used to analyse in particular the intellectual base used by the research field or to analyse documents that cite the same references.

The authors of the paper, who are researchers of the European IRNet project and international research network, described and analysed certain bibliographic results of these activities using methods of mapping and visualization of scientific domains.