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We present ant colony optimisation approach, enriched with a novel self-adaptation mechanism, applied to solve DIVERSUM Problem that consits of generating a small diversified entity summarisation in a knowledge graph. The recently proposed DIVERSUM problem is viewed in this paper in a novel way as a NP-hard combinatorial optimisation problem. The presented preliminary experimental results indicate...
Texture is considered as one of the most crucial image features used commonly in computer vision. It is important source of information about image content, especially for single-band images. In this paper we present the results of research carried out to assess the usefulness of selected textural features of different groups in panchromatic very high resolution (VHR) satellite image classification...
The Multiple Pheromone Ant Clustering Algorithm (MPACA) models the collective behaviour of ants to find clusters in data and to assign objects to the most appropriate class. It is an ant colony optimisation approach that uses pheromones to mark paths linking objects that are similar and potentially members of the same cluster or class. Its novelty is in the way it uses separate pheromones for each...
Most of the governments and civil society organizations work hardly to promote the disabled people especially blind and deaf persons to join the normal community and practice the regular daily life activities. Indeed, Information Technology with its modern methodologies such as mobile and Cloud computing has an impressive role in enhancing the inter-communication among the people with different disabilities...
In this article we explore students' experience with digital educational games. We analyze and discuss the factors which determine a student's perception of the educational benefits of game-based learning. The organization of the research is structured by the main question - how do variables such as player satisfaction, game features (e.g. the perceived quality of the educational content, the design)...
This paper is an attempt to present the concept of organizational transformation with the use of the strategic renewal theory oriented towards organizational learning. It is indicated that enterprise renewal processes constitute the basis for organizational changes enabling evolutionary development towards implementing enterprise learning mechanisms. A new aspect occurring in this presentation is...
This paper presents the design, implementation and user study of Vertoid — a mobile system for providing context-aware cues that help users limit domestic greenhouse-gas emissions. We have designed an Android-based mobile application that provides user with tips on simple eco-friendly actions in relevant locations. We then conducted a medium-term field study to evaluate the system. Our study shows...
This article provides an insight into the topic of ad-hoc protocols used for routing, namely proactive and reactive protocols. It depicts the general concept how these protocols can find a path in a network between two nodes and it also presents the evaluation of the methods of tracking the node path in a wireless ad-hoc network through investigating the available mobile routing protocols. The main...
In the recent years, the Global Positioning System (GPS) has become a standard for the location and navigation for a huge number of people all over the world. This system is unquestionably one of the most significant developments of the twentieth century. GPS employs a great variety of applications from car navigation and cellular phone emergency positioning even to aeronautic positioning. Despite...
Developing, for example, a simple booking web service with modern tools can be a matter of a few weeks work. Testing such a system should not need to take more time than that. Automatically generating tests from specified properties of the system using the tool QuickCheck provides professional developers with the required test efficiency. But how good is the quality of these automatically generated...
We present a novel method for automatic parallelization of functional programs which combines interpretation and just-in-time compilation. We propose an execution model for a Lisp-based programming language which involves a runtime environment which is able to identify portions of code worth running in parallel and is able to spawn new threads of execution. Furthermore, in order to achieve better...
Grammar-dependent software development and grammarware engineering have recently received considerable attention. As a significant cornerstone of grammarware engineering, grammar refactoring is, nevertheless, still weakly understood and practiced. In this paper, we address this issue by introducing pLERO, formal specification language for preserving knowledge of grammar engineers, complementing mARTINICA,...
One of the contemporary problems, and at the same time a big opportunity, in business networks of supply chains are the issues associated with the vast amounts of data arising there. The data may be utilized by the decision support systems in logistics; nevertheless, often there is an information integration problem. The problems with information interchange are related to issues with exchange between...
Autonomous Ground Vehicles (AGV) require diverse sensor systems to support the navigation and sense-and-avoid tasks. Two of these systems are discussed in the paper: dual camera-based computer vision (CV) and laser-based detection and ranging (LIDAR). Reliable operation of these optical systems is critical to safety since potential faults or failures could result in mishaps leading to loss of life...
Systems engineers use SysML as a vendor-independent language to model Cyber-Physical Systems. However, SysML does not provide an executable form to define behavior but this is needed to detect critical issues as soon as possible. Action Language for Foundational UML (Alf) integrated with SysML can offer some degree of precision. In this paper, we present an Alf specialization that introduces the synchronous-reactive...
Hibernate is the most popular ORM framework for Java. It is a straightforward and easy-to-use implementation of Java Persistence API. However, its simplicity of usage often becomes mischievous to developers and leads to serious performance issues in Hibernate-based applications. This paper presents five performance antipatterns related to the usage of one-to-many associations in Hibernate. These antipatterns...
Agility as a term is widely known today. However, a common understanding of what agility means and what it consists of is missing. Until today, a lot of frameworks have been developed, but they are very heterogeneous regarding content and structure. This paper approaches that issue by conducting a systematic comparison of 28 available agility frameworks out of the domains of agile manufacturing, agile...
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