Search results

The definition of modeling languages is a key‐prerequisite for model‐driven engineering. In this respect, Domain‐Specific Modeling Languages (DSMLs) defined from scratch in terms of metamodels and the extension of Unified Modeling Language (UML) by profiles are the proposed options. For interoperability reasons, however, the need arises to bridge modeling languages originally defined as DSMLs to UML. Therefore, the paper aims to propose a semi‐automatic approach for bridging DSMLs and UML by employing model‐driven techniques.

The paper discusses problems of the ad hoc integration of DSMLs and UML and from this discussion a systematic and semi‐automatic integration approach consisting of two phases is derived. In the first phase, the correspondences between the modeling concepts of the DSML and UML are defined manually. In the second phase, these correspondences are used for automatically producing UML profiles to represent the domain‐specific modeling concepts in UML and model transformations for transforming DSML models to UML models and vice versa. The paper presents the ideas within a case study for bridging ComputerAssociate's DSML of the AllFusion Gen CASE tool with IBM's Rational Software Modeler for UML.

The ad hoc definition of UML profiles and model transformations for achieving interoperability is typically a tedious and error‐prone task. By employing a semi‐automatic approach one gains several advantages. First, the integrator only has to deal with the correspondences between the DSML and UML on a conceptual level. Second, all repetitive integration tasks are automated by using model transformations. Third, well‐defined guidelines support the systematic and comprehensible integration.

The paper focuses on the integrating direction DSMLs to UML, but not on how to derive a DSML defined in terms of a metamodel from a UML profile.

Although, DSMLs defined as metamodels and UML profiles are frequently applied in practice, only few attempts have been made to provide interoperability between these two worlds. The contribution of this paper is to integrate the so far competing worlds of DSMLs and UML by proposing a semi‐automatic approach, which allows exchanging models between these two worlds without loss of information.

Ubiquitous web applications (UWA) are a new type of web applications which are accessed in various contexts, i.e. through different devices, by users with various interests, at anytime from anyplace around the globe. For such full‐fledged, complex software systems, a methodologically sound engineering approach in terms of model‐driven engineering (MDE) is crucial. Several modeling approaches have already been proposed that capture the ubiquitous nature of web applications, each of them having different origins, pursuing different goals and providing a pantheon of concepts. This paper aims to give an in‐depth comparison of seven modeling approaches supporting the development of UWAs.

This methodology is conducted by applying a detailed set of evaluation criteria and by demonstrating its applicability on basis of an exemplary tourism web application. In particular, five commonly found ubiquitous scenarios are investigated, thus providing initial insight into the modeling concepts of each approach as well as to facilitate their comparability.

The results gained indicate that many modeling approaches lack a proper MDE foundation in terms of meta‐models and tool support. The proposed modeling mechanisms for ubiquity are often limited, since they neither cover all relevant context factors in an explicit, self‐contained, and extensible way, nor allow for a wide spectrum of extensible adaptation operations. The provided modeling concepts frequently do not allow dealing with all different parts of a web application in terms of its content, hypertext, and presentation levels as well as their structural and behavioral features. Finally, current modeling approaches do not reflect the crosscutting nature of ubiquity but rather intermingle context and adaptation issues with the core parts of a web application, thus hampering maintainability and extensibility.

Different from other surveys in the area of modeling web applications, this paper specifically considers modeling concepts for their ubiquitous nature, together with an investigation of available support for MDD in a comprehensive way, using a well‐defined as well as fine‐grained catalogue of more than 30 evaluation criteria.

The purpose of this paper is to provide a feature‐based characterization of version control systems (VCSs), providing an overview about the state‐of‐the‐art of versioning systems dedicated to modeling artifacts.

Based on a literature study of existing approaches, a description of the features of versioning systems is established. Special focus is set on three‐way merging which is an integral component of optimistic versioning. This characterization is employed on current model versioning systems, which allows the derivation of challenges in this research area.

The results of the evaluation show that several challenges need to be addressed in future developments of VCSs and merging tools in order to allow the parallel development of model artifacts.

Making model‐driven engineering (MDE) a success requires supporting the parallel development of model artifacts as is done nowadays for text‐based artifacts. Therefore, model versioning capabilities are a must for leveraging MDE in practice.

The paper gives a comprehensive overview of collaboration features of VCSs for software engineering artifacts in general, discusses the state‐of‐the‐art of systems for model artifacts, and finally, lists urgent challenges, which have to be considered in future model versioning system for realizing MDE in practice.

Spanish-speaking children learn to read words written in a relatively transparent orthography. Variations in orthographic transparency may shape the manifestation of reading difficulties. This study was intended to help clarify the nature of developmental dyslexia in Spanish. Developmental dyslexic group (DD) were compared to two control groups, a chronological age-matched control group (CA) and a reading level-matched control group (RL). Measures included naming speed, verbal working memory (WM), phonological short-term memory (STM), phonemic awareness, and different reading subtests (letter, word and pseudoword reading, punctuation mark, reading skills). On the reading subtests, accuracy and reading speed were measured. Results demonstrated that developmental dyslexics show a severe deficit in lexical access on accuracy and speed measures, in addition to reading-related cognitive deficits in areas such as naming speed, verbal WM, phonological STM, and phonemic awareness. Hierarchical cluster analysis demonstrated that a subgroup of children with DD showed lower IQs and more severe reading-related cognitive deficits in naming speed, verbal WM, and phonological STM. Our results are consistent with studies conducted in the Spanish language and in other transparent orthographies.

There have always been traditional differences between the various regions of the British Isles. For example, meat consumption is greater in the North than the South; most families take some meat at every meal and this extends to the children. The North is the home of the savoury meat products, eg., faggots, rissoles and similar preparations and a high meat content for such foods as sausages is expected; between 80 and 90% with the cereal only present for binding purposes. Present minimum meat contents would be considered a swindle, also the nature of the lean meat and the lean meat/fat ratio. The high water content similarly would have been unacceptable.

This article is intended to stimulate theoretical reflection in international comparative studies in library and information science (comparative LIS).

The need for theory is emphasized and shortcomings in comparative LIS in respect of theory are identified. On the basis of literature from other comparative disciplines, a framework for examining issues of metatheory, methodology and methods is constructed. Against this background the role of theory and metatheory in the literature of comparative LIS is evaluated. General observations are illustrated using examples selected from comparative studies in LIS.

Much of the literature of comparative LIS is atheoretical and based on assumptions that reflect naive empiricism. Most comparativists in LIS fail to link their work to that of colleagues, so that no body of theory is built up. Insufficient use is made of theory from other social science disciplines. There is a little evidence of awareness of metatheoretical assumptions in the sociological, teleological, ontological, epistemological and ethical dimensions.

While general observations are presented about the literature of comparative LIS, this is not a bibliometric study. Issues of methodology and method are not dealt with.

Recommendations are made for improving teaching and research in comparative LIS. Concepts presented here are of value to the wider LIS community, particularly in internationally oriented research and practice.

Since the 1980s there has been very little conceptual and methodological reflection on comparative LIS. This article alerts the LIS profession to new thinking in other comparative disciplines.

Under this heading are published regularly abstracts of all Reports and Memoranda of the Aeronautical Research Council, Reports and Technical Memoranda of the United States National Advisory Committee for Aeronautics and publications of other similar Research Bodies as issued

The purpose of this paper is to explore the relationship between the consumption of counterfeit luxury goods and identity construction. The argument is that through the consumption of counterfeit luxury goods consumers obtain real and symbolic benefits that allow them to express a desired social image and further their identity.

A total of 37 in‐depth interviews were conducted with women who owned both originals and counterfeits of luxury fashion products.

The findings highlight three main themes describing inner benefits that consumers attain with the purchase and consumption of counterfeit luxury goods: first, being efficient by optimizing their resources; second, having fun by experiencing adventure, enjoyment, and risk; and third, fooling others expecting not to be caught. But most important, through the accomplishment of these goals consumers of counterfeit luxury goods construct an identity in which they perceive themselves as “savvy” individuals.

The intent is to contribute to the understanding of the process of identity construction through consumption. This consumption occurs in a particular context; the consumption of counterfeit luxury goods. The experience is singular in the sense that this paper shows the existence of consumers who can afford the prices of luxury fashion brands but decide to buy counterfeits and also because it depicts how individuals can construct a confident self‐image from an ethically questionable behavior. The consumption of counterfeit luxury brands serve consumers a self‐concept expressive function (by helping them to communicate who they are) and an adaptive social function (by rewarding them with social acceptance).

The purpose of this paper is to identify the relationships between process modeling and Industry 4.0, the strategic themes and the most used process modeling language in smart factories. The study also presents the growth of the field of study worldwide, the perspectives, main challenges, trends and suggestions for future works.

To do this, a science mapping was performed using the software SciMAT, supported by VOS viewer.

The results show that the Business Process Model and Notation (BPMN), Unified Modelling Language (UML) and Petri Net are the most relevant languages to smart manufacturing. The authors also highlighted the need to develop new languages or extensions capable of representing the dynamism, interoperability and multiple technologies of smart factories.

It was possible to identify the most used process modeling languages in smart environments and understand how these languages assist control and manage smart processes. Besides, the authors highlighted challenges, new perspectives and the need for future works in the field.