Janusz Sobecki

Janusz Sobecki
Wroclaw University of Science and Technology | WUT · Faculty of Computer Science and Management

Ph.D., D.Sc.

About

89
Publications
11,045
Reads
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495
Citations
Additional affiliations
September 1986 - November 2020
Wroclaw University of Science and Technology
Position
  • Professor (Associate)
Education
October 1981 - September 1986
Wroclaw University of Science and Technology
Field of study
  • Information Systems

Publications

Publications (89)
Preprint
Full-text available
The main purpose of this article was to create a model and simulate the profitability conditions of an interactive presentation system (IPS) with the recommender system (RS) used in the kiosk. 90 million simulations have been run in Python with SymPy to address the problem of discount recommendation offered to the clients according to their usage o...
Chapter
The main purpose of this article was to create a model and simulate the profitability conditions of an interactive presentation system (IPS) with the recommender system (RS) used in the kiosk. 90 million simulations have been run in Python with SymPy to address the problem of discount recommendation offered to the clients according to their usage o...
Article
Introduction.-Recent research on human-robot interactions (HRI) emphasizes a role of user's attitudes in perceiving robot's with different robot embodiments of varying levels of human likenesses. However, other human factors such as educational background may also help understanding of what conditions contribute to enhance social perception of robo...
Article
Full-text available
Introduction Recent research on human–robot interactions (HRI) emphasizes a role of user's attitudes in perceiving robot's with different robot embodiments of varying levels of human likenesses. However, other human factors such as educational background may also help understanding of what conditions contribute to enhance social perception of robot...
Article
Full-text available
The main goal of the presented paper is to propose a method for adaptation of the user interface of workflow software to increase its efficiency, reduce the number of errors, and improve its UX. The authors assumed that the system adaptation will be achieved by application to intelligent methods for modeling user as well as system. In order to do t...
Chapter
Microinteraction is a small function dedicated to a single task. Four elements can be specified in its structure: a trigger, rules, feedback loops, and modes. Triggers and feedback give visual hint to the user, thus the interaction might be investigated in eye tracking studies. We were aiming to investigate the usefulness of microinteraction model...
Article
Full-text available
This research note focuses on human recognition of emotions embodied in a moving humanoid NAO robot. Emotional movements emulated on NAO intended to induce joy or sadness were presented to participants whose facial expressions were recorded and analysed with a Noldus FaceReader. Our preliminary results indicate reliable emotion recognition using th...
Chapter
This paper presents an overview of Human-Human Interaction field that would be dedicated to tackling problems that occur while interacting with other people. There are many domains, in which researchers conduct studies regarding interaction between people and electronic devices. However, while doing such research, the problems of human-human intera...
Chapter
The aim of the study was to present and verify the methodology used in usability tests for web pages graphic designs with the use of: eye-tracking registration and first click tasks with participation of users. The usability analysis is based on both the observation of the user performance as well as the user feedback from the performed task. In th...
Article
Background & Study Aim: Sport, professionally and for all, is an area of both the application of modern technology, and to create new ones. The premises of such a statement is to protect health (all practitioners sport) and to achieve optimal sport results first of all by top athletes. In judo, like in each combat sports, motoric actions are cumula...
Conference Paper
This paper presents an augmented reality (AR) trainer system based on the Microsoft Kinect to help improve performance when training high-precision techniques in judo. We focus on tachi-waza (standing techniques) in judo, however, other disciplines can be supported too, as well as rehabilitation of patients after injuries. The proposed AR system in...
Conference Paper
We proposed a study evaluating and verifying the validity of the enhancement of eye tracking usability testing with EEG analysis. The aim of our research was to find if there were any regularities and correlations between eye contact characteristics and emotional reaction during task performance. We defined different types of web elements (AOI) for...
Article
Full-text available
The mental training (Galloway, 2011) is one of the measures of the psychological preparation in sport. Especially such as the judo discipline requires the mental training, due to the fact that the judo is a combat sport, the direct, physical confrontation of two opponents. Hence the mental preparation should be an essential element of preparing for...
Chapter
Recent advancements in 3D video generation, processing, compression, and rendering increase accessibility to 3D video content. However, the majority of 3D displays available on the market belong to the stereoscopic display class and require users to wear special glasses in order to perceive depth. As an alternative, autostereoscopic displays can re...
Conference Paper
An original architecture for production and usage of modal linguistic summaries in IoT contexts and domains is presented. The underlying research takes into account basic features of real IoT contexts and tries to map them effectively into a set of functional requirements. The architecture is strongly influenced and supported by original models of...
Article
Full-text available
The article follows up on two research and implementation grants. One focused on the application of mobile ICT systems to improve communication efficiency within the structure of the AZS-AWF Wrocław sports club (e-AZS platform). The other was devoted to the application of the technology of augmented reality to prototype educational trainers as seen...
Conference Paper
Full-text available
In this paper we present a description of a proposed hybrid, remote usability testing method and a comparison of different approaches to participant recruitment for the test conducted according to this usability evaluation method. Moreover this paper contains a description of the implemented hybrid method and its characteristic. One of the main fea...
Conference Paper
Full-text available
In this paper we present our approach to statistical verification of the proposed remote usability testing method based on data gathered from participants of the test. Remote usability testing is becoming more and more popular, because it allows to perform usability tests faster and cheaper than with traditional laboratory testing, while providing...
Conference Paper
Full-text available
Recent advancements on 3D video generation, processing, compression and rendering increase accessibility to 3D video content. However, the majority of 3D displays available on the market belong to the stereoscopic display class and require users to wear special glasses in order to perceive depth. In difference, autostereoscopic displays can render...
Conference Paper
Full-text available
In the paper we present a method for usability evaluation of kinetic gesture based user interfaces with application of eye tracking. First we present the problems of the kinetic interaction and the application of eye tracking in usability studies. Then we present our method of the usability verification with applied eye tracking, by performing a sa...
Chapter
In this chapter the problem of complex interactive environments configuration is presented. These systems are using various types of sensors such as touch, depth or RFID. First we present a few examples of digital signage applications delivered and then we propose their taxonomy. The presented taxonomy is used to prepare set of default configuratio...
Article
This chapter presents the concept of development and management of SOA applications within the configurable service platform which supports all phases starting from business process definition. The unique features of the platform include: business process compatibility, easy reconfiguration of composition schemes, visual support for requirements an...
Conference Paper
Full-text available
In this paper we present our approach, for tracking and analyzing users' actions, in user interfaces of gesture based information systems. We present a tool for gathering interaction data, for usability analysis, during tests with users. Interaction with gesture based interfaces differs from interactions with standard devices such as mouse or keybo...
Conference Paper
Full-text available
This paper describes the application of network analysis in website usability verification. In particular we propose a new automatic usability testing method by means of application of network motifs analysis. In our method motifs are constructed according to the patterns of visited web-pages by particular users, which define the relationships betw...
Article
Full-text available
In this paper a comparison of a few swarm intelligence algorithms applied in recommendation of student courses is presented. Swarm intelligence algorithms are nowadays successfully used in many areas, especially in optimization problems. To apply each swarm intelligence algorithm in recommender systems a special representation of the problem space...
Conference Paper
In the paper a method for ontology enhanced web-based user interface generation for SOA systems is presented. SOA paradigm defines a set of methodologies for building a software out of interoperable services. These services usually have an interactive character so in consequence they need a corresponding user interface to be delivered. Today these...
Conference Paper
Full-text available
In this paper we present a new cost-effective method for usability evaluation using eye tracking enhanced with intelligent data analysis. In this method we propose application of a low-cost infrared camera and free Ogama software. Moreover we present how the standard data analysis, which is usually made manually by experts, may be enhanced by appli...
Conference Paper
In this paper we present a tool for gathering touchscreen data for usability analysis. Touchscreens are becoming the most popular input/output devices mainly because of increasing number of smartphones and tablets. As the interaction with touchscreens differs from interaction using standard devices such as mouse or touchpad it is necessary to deliv...
Article
In the chapter a method for ontology enhanced user interface adaptation for SOA systems is presented. SOA paradigm defines a set of methodologies for building a software out of interoperable services. Most of the services have an interactive character so they need a corresponding user interface to be defined. Today these interfaces are implemented...
Conference Paper
In this paper we present comparison of several nature inspired algorithms applied in recommendation of student courses. Nature inspired algorithms proved to be very effective in solving many optimization problems, here we show that these techniques could be successfully used in solving the problem of prediction of final grades students receives on...
Conference Paper
Full-text available
In this paper we present general problems of a mobile application usability testing by means of eyetracking. The motivation for considering this problem is the fact that eyetracking is still one of the most advanced usability testing tool. We achieved that by performing two eyetracking tests with the participation of users. We tested mobile applica...
Conference Paper
Smart Service Workbench (SSW) is an integrated tool devoted to support business processes in distributed IT environment based on Service Oriented Architecture (SOA) paradigm. The tool’s scope of functionalities is divided into modules that cover the whole process starting from the arrival of service request and ending with a return results of reque...
Chapter
In this paper the authors present some recent results regarding advanced methods for Computational Collective Intelligence, which have been worked out in the Division of Knowledge Management Systems, Institute of Informatics, Wroclaw University of Technology. Three aspects have been focused: Knowledge Integration, Agent-based Systems and Recommenda...
Chapter
Full-text available
In the paper we present recommendation of student courses. We want to show that this problem has many aspects and a lot of parameters which can be specified by final user. We want to focus on recommendation aspect seen from user perspective and compare this expectations with possibilities of the system. We show the most important aspects of student...
Conference Paper
In the paper we present comparison and analysis of the selected eye pointing methods and applications. Eye pointing enables communication with the computer system using human eye movements tracking. We analyze not only available eyetracking solutions but also those developed at our laboratory (i.e. ljo_gazetracker) are using specialized gazetrackin...
Chapter
In the chapter an approach to solve the problem of service matchmaking and discovery is discussed. By a service we mean a independent component which has specified inputs and outputs and some functional and non-functional features. In our approach to describe services ontologies are used. It helps us to include some semantics to the services. Proce...
Conference Paper
Full-text available
Questionnaire is a method of evaluating the quality of information system or the quality of its interface and provided services. It’s main purpose is to gain knowledge about users themselves and how they work with the system. To draw valuable conclusions from the questionnaire, methods of statistical data analysis are employed. Processing of questi...
Article
Usability valuation of a Service Oriented Architecture (SOA) system requires statistical and computational approach rather standard user-experience based methods such as user focus-group surveys or moderated user tests with predefined scenarios. This paper includes the usability valuation experiment of example SOA/SOKU system and further descriptio...
Conference Paper
In the paper we present an ontology based service discovery in the SOA system. First we show an application of the following models: business motivation model (BMM) and business process model as well as information for an identification of the business services in a selected area of the university activities has been described. Then we show an impo...
Conference Paper
Full-text available
In the paper we present recommendation of student courses using Ant Colony Optimization (ACO). ACO is proved to be effective in solving many optimization problems, here we show that ACO also in the problem of prediction of final grades students receives on completing university courses is able to deliver good solutions. To apply ACO in any recommen...
Chapter
Different data are present in every branch of computer science, statistics, mathematics, and such, often treated as soft techniques, as human-computer interaction, usability evaluation and ergonomics. Using standard quality evaluation methods the received results obtained empirically or analytically, are not systemized and that increases the cost o...
Conference Paper
E-commerce is one of the most important application of recommendation systems (RS). In this paper we examine several recommendation methods for application in Web-based gift recommendation systems. These methods were verified experimentally using MovieLens data set as well as data gathered during tests with the implemented SzukamCzegos.pl system.
Article
A method for image identification based on the pupil size analysis during human-computer interaction will be presented. The data was gathered during the experiment on 3D interactive representation of fairly large picture collections which facilitates browsing through unstructured sets of icons or pictures. The data was gathered using ASL gaze-track...
Article
In this paper web–based system user interface hybrid recommendation method based on the ant colony metaphor is presented. We apply the ontology–based user and user interface modeling. The user model is represented as a tuple and user interface model is represented by a set of connected nodes, what enables suitable user interface design, an interfa...
Article
Full-text available
Recommender systems are applied in many areas such as information retrieval, web browsing or information filtering. They are applying many different reasoning methods that are known from many disciplines such as Artificial Intelligence, Expert Systems or Information Retrieval. Recently, the recommender systems also adopt some nature inspired method...
Conference Paper
In this paper web-based movie recommendation system using hybrid filtering methods is presented. The recommender systems deliver one of the methods for increasing the web-based systems attractiveness and usability. We can distinguish three basic filtering methods that are applied in recommender systems: demographic, content-based, and collaborative...
Conference Paper
In the paper web-based system user interface hybrid recommendation method based on the ant colony metaphor is presented. In this paper we apply the ontology-based user and user interface modeling. The role of ontologies in the user and user interface modeling is determining objects, concepts and relations between them. The user model is represente...
Conference Paper
Interface agents are applications of recommender systems that are applied in many areas such as information filtering, information retrieval or web browsing. Different reasoning methods that are known from many disciplines: Artificial Intelligence, Expert Systems or Information Retrieval are being used by recommender systems. Recently, the recommen...
Article
This paper presents a novel method for user classification in adaptive systems based on rough classification. Adaptive systems could be used in many areas, for example in a user interface construction or e-Learning environments for learning strategy selection. In this paper the adaptation of web-based system user interface is presented. The goal of...
Conference Paper
The application of hybrid recommendation enables to overcome disadvantages of all three basic approaches: demographic, content-based, and collaborative ones. In this paper we present application of web-based cooking information system that recommends cooking recipes for different users. This work is continuation of previous works on hybrid recommen...
Article
Full-text available
Application of hybrid recommendation enables overcoming disadvantages of the basic recommendation methods: demographic, collaborative and content -based. In this paper the two consensus-based hybrid recommendation methods are presented. Then some examples of their implementations to different web-based systems are shown.
Conference Paper
Hybrid recommendation enables overcoming disadvantages of the basic recommendation methods: demographic, collaborative and content-based. In this paper the consensus-based hybrid recommendation is presented. Then some examples of its implementation to different Web-based systems are shown.
Conference Paper
Full-text available
In this paper we deal with the problem of non-intuitive and low-efficient negotiations between agents in agent based system. We find recommendation techniques as a suitable method of making negotiation smarter and more efficient. We have introduced into the negotiation thread the following improvements: content-based recommendation and collaborativ...
Article
Full-text available
Consensus methods proved to be very effective in solving problems in many areas. In this paper a hybrid adaptation of web-based system user interfaces that uses consensus methods is presented. The hybrid recommendation is a combination of the following methods: demographic, content-based, and collaborative. Each of this method has its specific adva...
Conference Paper
Learning scenario determination is one of the key tasks of every Intelligent Learning Systems (ILS). This paper presents a method for learner classification in ILS based on rough classification methods proposed by Pawlak. The goal of rough learner classification is based on the selection of such a minimal set of learner profile attributes and their...
Article
In this paper a conception of the model for learning scenario determination is presented. We define the learning scenario as a sequence of the hypermedia pages, representing particular knowledge units, and tests related to them. The scenario determination is a dynamic process that begins when a new student takes up a course. The opening scenario fo...
Conference Paper
Full-text available
E-Learning environments nowadays should adapt to their users and computer platforms they are using. In this paper the learning scenario collaborative recommendation based on consensus method using XML is presented. We present the XML description of the learning scenario and its components as well as the link database and XSL transformations for pre...
Conference Paper
The paper presents a method of learning scenarios determination in intelligent web-based learning environment. The scenario is defined as a sequence of concepts from domain knowledge represented by a series of hypermedia pages. Presentation techniques used for pages construction correspond with teaching methods that are applied to the class of stud...
Conference Paper
The interface adaptation is one of the methods for increasing the web-based system usability, especially when we consider differences among the population of users. We can distinguish demographic, content-based, and collaborative recommendations. The combination of these approaches that is called hybrid adaptation enables to overcome their disadvan...
Article
In the recent years web-based systems are very often used in product promotion mostly for delivering up-to-date information about them. For most systems of this kind well designed user interfaces are of a great importance. These systems are, however, used by a highly differentiated population of users accessing these systems by means of various pla...
Article
This paper presents a concept of adaptive development of user interfaces in multimodal web-based systems. Today, it is crucial for general access web-based systems that the user interface is properly designed and adjusted to user needs and capabilities. It is believed that adaptive interfaces could offer a possible solution to this problem. Here, w...
Conference Paper
The effectiveness of e-Learning process can be increased by integration of hypermedia presentation possibilities of teaching methods with student’s learning styles. It may be achieved by applying to user profile and tutoring strategy description the elements representing learner’s cognitive characteristics. The paper discusses the conception of Fel...
Conference Paper
The differences among the population of the web-based systems users have very significant consequences in their interaction preferences. Many web-based systems offer different personalization mechanisms that enable users to adjust systems’ interfaces to their personal needs, however, quite many users don’t want to bother themselves doing it or are...
Conference Paper
This paper is dedicated to applications of consensus methods in solving conflicts defined by Pawlak [12, 13]. The most characteristic feature of consensus methods surveyed in this paper is that the structures of opinions of conflict participants are multi-value and multi-attribute and the basis of consensus determining consists of distance function...
Conference Paper
In this paper a concept for multiplatform web application adaptive construction of user interfaces using consensus methods is presented. User interfaces are becoming the crucial element of every information system. It is obvious that because of the differences among users it is almost impossible to construct the single interface equally efficient i...
Conference Paper
We present web-based implementation of the intelligent tutoring system. In the system the strategy selection is made by application of consensus methods. In the system the tutoring strategy is adapted for the particular student basing on the successful strategies of other similar students. Domain knowledge of the system contains traffic regulations...
Conference Paper
In the paper a concept for adaptive construction of the user interfaces of multiplatform hypermedia applications is presented. The user interface is becoming the crucial element of every information system and as the users as well as platforms are very differentiated it is difficult to construct a single equally efficient interface for all of these...
Conference Paper
Full-text available
In the paper the model of a social adaptive web-based system user interface is presented. In the model the object-oriented hierarchical representation is used to reflect the properties of the interface. The model was constructed to be suitable for: a user interface design, an interface personalization, as well as determination of a representation o...
Chapter
In this paper we describe the consensus problem solution applied to the web-based system interface construction for each class of users. We assume that we have a multiagent system that collects knowledge about user interactions with different systems in the form of user profiles which serve to user classification. This multiagent system also collec...
Article
Full-text available
In today's world properly designed user interfaces are becoming crucial for every information systems. Population of users is very differentiated, so it is almost impossible to design for every information system a single, equally appropriate, user interface for each user. Instead, we postulate to construct adoptive interfaces that take into accoun...
Article
The tutoring strategy selection is made in the environment of hypermedia scenes that presents knowledge in some domain. The knowledge may be presented in many different ways and human tutors may construct, out of these scenes, several tutoring strategies that present the knowledge. This paper depicts a method for consensus based strategy selection...
Article
User interfaces play very important role in today's information systems. These kind of systems could have even millions of users, from the other hand they are rather naïve in using them. In the paper two general approaches to interface design and development are presented. First Human Computer Interaction (HCI) is concentrated upon construction of...