Edyta Łukasik

Lublin University of Technology · Institute of Computer Science

In a world in which biometric systems are used more and more often within our surroundings while the number of publications related to this topic grows, the issue of access to databases containing information that can be used by creators of such systems becomes important. These types of databases, compiled as a result of research conducted by leadi...

Creating the proper player profile in training is crucial for athlete development. Although there is a great number of studies concerning this subject, there is no solution that would allow to model it in a convenient way. Applying fuzzy modelling clustering can be useful in this field. Moreover, the application of sophisticated acquisition techniq...

The aim of the article is to analyze and compare the performance and accuracy of architectures with a different number of parameters on the example of a set of handwritten Latin characters from the Polish Handwritten Characters Database (PHCD). It is a database of handwriting scans containing letters of the Latin alphabet as well as diacritics char...

Purpose Physical activity (PA) is a well-known, simple and effective preventive and therapeutic intervention for low back pain (LBP). In spite of the growing interest in active lifestyles and its benefits, more needs to be known about the relationship between energy expenditure, body mass and lumbar-pelvic kinematics during the forward bending move...

This paper presents a new approach to the problem, the so-called inconsistency reduction in comparison matrices. Pairwise comparison matrices are used primarily in multi-criteria decision-making methods such as AHP (Analytic Hierarchy Process), where the problem of ensuring consistency of assessment regarding many different parameters also arises i...

In today’s highly computerized world, data compression is a key issue to minimize the costs associated with data storage and transfer. In 2019, more than 70% of the data sent over the network were images. This paper analyses the feasibility of using the SVD algorithm in image compression and shows that it improves the efficiency of JPEG and JPEG200...

Creating the proper player profile in training is crucial for athlete development. Although there is a great number of studies concerning this subject, there is no solution that would allow to model it in a convenient way. Applying fuzzy modelling clustering can be useful in this field. Moreover, the application of sophisticated acquisition techniq...

The purpose of the article is to analyze frameworks for artificial intelligence applications. In particular, the effectiveness, time-consumption and resources requirement. Linear regression, random forests and k nearest neighbors models were created for each framework. The learning data is a dataset containing informations about diamonds and their...

Prolonged sitting may involve several mechanisms that make it a risk factor for low back pain. The aim of this study was to investigate lumbar-pelvic kinematics and multifidus muscle (MF) activity during squatting and forward bending in relation to the sedentary behaviour of physically active students. Sixty-three students were divided into two gro...

Conservation of cultural heritage is nowadays a very important aspect of our lives. Thanks to such legacy we gain knowledge about our ancestors, methods of production and ways of their life. The rapid development of 3D technology allows for more and more faithful reflection of this area of life. The rich cultural heritage, both tangible and intangi...

This paper presents an approach to compare and classify books written in the Polish language by comparing their lexis fields. Books can be classified by their features, such as literature type, literary genre, style, author, etc. Using a preassembled dictionary and Jaccard index, we managed to prove a compact hypothesis concerning similar books. Fu...

Traditional dance is one of the key elements of Intangible Culture Heritage (ICH). Many scientific papers concern analysis of dance sequences, classification and recognition of movements, making ICH data public, creating and visualising 3D models or software solutions for learning folklore dances. These works make it possible to preserve this disap...

Regarding wireless sensor network parameter estimation of the propagation model is a most important issue. Variations of the received signal strength indicator (RSSI) parameter are a fundamental problem of a system based on signal strength. In the present paper, we propose an algorithm based on Bayesian filtering techniques for estimating the path-...

Machine learning requires a human description of the data. The manual dataset description is very time consuming. In this article was examined how the model learns from artificially created images, with the least human participation in describing the data. It was checked how the model learned on artificially produced images with augmentations and p...

The purpose of this study is to compare recreationally physically active females and males with regard to spine, pelvis and lower limb joints peak angles in each plane of motion during a single leg squat (SLS). The second aim is to investigate the relationship between kinematics and SLS depth in females and males. Fifty-eight healthy, young adults...

Human movement analysis is very often applied to sport, which has seen great achievements in assessing an athlete’s progress, giving further training tips and in movement recognition. In tennis, there are two basic shots: forehand and backhand, which are performed during all matches and training sessions. Recognition of these movements is important...

The aim of this study was to analyze the relationship of range of motion (ROM) in the sagittal plane and timing parameters during a bodyweight squat to the depth of the squat. Sixty participants (20 females and 40 males) took part in this study. They were instructed to perform a bodyweight squat to the maximal depth position. Kinematic data were ob...

Introduction and objective. Low back pain (LBP) is a problem which causes human suffering and entails costs for treatment. Chronic LBP is considered a civilization diseases in developed countries and one of the major public health problem worldwide. Squatting is a part of such daily activities as sitting down, standing up or lifting objects. In thi...

The article explores the possibilities of using convolutional neural networks to recognize the type of tennis shots. The study compares two architectures of such networks: Inception-v3 and MobileNet. Two datasets consisting of images of tennis players making an impact are analyzed in order to identify the type and phase of impact. The images in eac...

Frequently the quality of a path returned by a pathfinding algorithm is more important than the performance of that algorithm. This paper presents a new algorithm, based on A*, which is better suited for use in 3D game engines. The modification was evaluated by a series of comparative tests. The standard A* algorithm was used as a benchmark in the...

This study examines the efficiency of certain software tasks in applications developed using three frameworks for the Android system: Android SDK, Qt and AppInventor. The results obtained using the Android SDK provided the benchmark for comparison with other frameworks. Three test applications were implemented. Each of them had the same functionali...

Background: Bipedal leg squat is a common rehabilitation exercise. It is used for evaluation of lower limb function and pelvis and core stability. The aim of this study was a comparison of the lower limb, pelvis and spine ranges of motion in subjects with different declared physical activity level during bipedal squat. Material and methods: Twenty...

Patellofemoral pain syndrome (PFPS), the most common source of knee pain among physically active individuals, is defined as anterior knee pain involving the patella and retinaculum that excludes other intraarticular and peri-patellar pathology. Differences in the activation and endurance of the quadriceps components, causing an imbalance in the for...

The aim of the article is to compare three programs for the optical text recognition. The problem of the optical text recognition has been defined. Next, briefly the functionality of this technology was described. The most important programs realizing the discussed problem were also characterized. The selected programs were tested using two samples...

The purpose of this paper is to study that the rowers’ technique may be analysed using 3D data. An quantitative analysis of rowing technique, both of the posture and of the handle's positions while rowing are presented. The analysed parameters in ergometer rowing are obtained from three-dimensional data. They include: stroke count, time and speed o...

The article contains a comparative analysis of two methods of calculating angles in the shoulder joint of the right upper limb. For the purposes of this study, a marker-vector method was developed that calculates angles based on retroreflective 3D marker's positions and vectors created on the basis of their positions. Movements from two types of sp...

Clinicians use forward bending and backward return in routine clinical examinations for evaluating spine mobility. The magnitude and timing of lumbar spine and pelvic contributions have been described in the literature as lumbopelvic rhythm. There is still limited knowledge about the factors which can determinate lumbar and hip mobility and coordin...

Three-dimensional optical systems are used for calculating many kinetic and kinematic parameters. The obtained data are precise; however, their repeatability is a very important aspect. The aim of this paper is to verify the range of motion repeatability of one healthy subject in the joints of the pelvis, spine and lower limbs based on the coeffici...

Introduction. Productive sporting performance in various sports disciplines often heavily depends on jumping abilities as well as on lower limb muscles power and endurance of the athletes involved. Both CrossFit, a popular high-intensity training program and sport climbing require lower extremity muscular power and endurance. Aim. The aim of this s...

Introduction and aim: Regular physical activity improves neuromuscular coordination, flexibility, strength, and endurance. During the squat, there is a synergy of motion between hip, knee, and ankle joints. Nowadays there is lots of high-technology equipment to determine the motion of the human body. The aim of the study was to compare the range of...

3D motion visualization is a topic closely connected with motion capture. Motion capture data come in many file formats, one of which is C3D. The following paper presents an innovative method of motion visualization in virtual reality using Google Cardboard. Motion data are read from C3D files. The paper presents introduction to the technology used...

In 2014, Apple unveiled a completely new programming language for the iOS and OS X platforms. Swift was presented as a modern programming language, such as: safe, easy to learn and easy to use. This article presents the performance comparison between the Swift and Objective-C languages. For the purpose of the research, two applications were develop...

Background. Self-myofascial release (SMR), a type of myofascial release is a popular therapy performed by the individual using a foam roller. The aim of the present study was to evaluate the immediate effect of SMR using a foam roller on electromyographic muscle activity during isometric contraction. Material and methods. Twenty healthy adults (17...

The aim of the article is to present a model of the rower, taking into account the most important angles and the new algorithms for studying the position of the rower’s body at different phases of rowing. The positions of the rower’s back, elbows and wrists during rowing were analyzed. The paper presents research on the motion capture of rowers pra...

Introduction and purpose Forward bending is a part of standard evaluation of spine mobility during physical examination. More sedentary lifestyle seems to be a factor lead to limited range of motion. However influence of physical activity level on kinematics of joints during bending has not been previously investigated. In this study, kinematics of...

This article presents the performance analysis of a cross-platform mobile application implemented with Xamarin and two native applications for Android and iOS platforms. The results concerning the time analysis for selected activities were compared in order to determine whether cross-platform tools are worth using in mobile application development....

The subject of the article is to compare the methodologies for the production of mobile applications in Swift and Objective-C languages. The similarities and differences of the implementation of applications for these two programming languages will be identified as a part of the analysis. An Magic Drawing Board application using Quartz 2D engine wa...

The squat is a typical closed kinetic chain motion task. It is an important component of programs in physical therapy and sport training. It’s a complex activity, consisting of hip flexion, knee flexion and ankle dorsiflexion. For this reason, the squat can be used in nonobjective assessment of muscular strength and range of motion in functional ac...

Celem pracy była analiza i badanie programowej platformy Node.js i frameworka Laravel, a także porównanie wydajności serwisów utworzonych za pomocą tych technologii. Testy wydajności aplikacji przeprowadzono za pomocą oprogramowania Apache Benchmark i Apache JMeter. Analiza obejmuje teoretyczne i praktyczne aspekty ich funkcjonowania.

Artykuł przedstawia analizę porównawczą wybranych algorytmów, służących do rozwiązywania Sudoku. Porównywane są puzzle różnej wielkości, posiadające różny poziom trudności. Sprawdzany jest wpływ tych czynników na czas działania algorytmów. Na potrzeby badań stworzono specjalną aplikację, która zawiera wszystkie potrzebne algorytmy.

Celem artykułu było tworzenie i analiza aplikacji webowej na bazie frameworku AngularJS. Dla aplikacji zostało napisane API po stronie serwera z połączeniem do bazy danych. Była przeprowadzona analiza teoretyczna związana z funkcjonowaniem badanego frameworku. Przeanalizowane wady i zalety podejścia frameworku do tworzenia aplikacji webowych. Były...

Celem artykułu było porównanie wybranych szkieletów programistycznych w technologii Java. Do analizy zostały wybrane Spring MVC oraz JavaServer Faces. Została przeprowadzona analiza teoretyczna związana z funkcjonowaniem badanych frameworków. Dla porównania wybranych szkieletów programistycznych były utworzone dwie aplikacje, posiadające podobną fu...

The paper presents research on the motion capture of rowers practising on the Concept II Indoor Rower ergometer, using a motion capture device produced by the Vicon company, as well as a wireless heart rate monitor. The aim of the article is to analyse and assess the extent of variation of the angular position of the rower’s back at different phase...

Modern technologies, such as motion capture systems (both optical and markerless), are more and more frequently used for athlete performance analysis due to their great precision. Optical systems based on the retro-reflective markers allow for tracking motion of multiple objects of various types. These systems compute human kinetic and kinematic pa...

The paper presents an analysis of a rowing technique and the participant's fatigue based on the handle's trajectory. The rowing was recorded with the use of Vicon motion capture. Seven non-rowers were participants in the research. 42 strokes were analysed in three phases of rowing. Two theses: (i) “handle trajectory indicates the fatigue while rowi...

Using an optical passive motion capture system, researchers encounter problems involving marker occlusion. A marker can be covered during motion. This loss of information may cause various problems. For example, the output values of a biomechanical model (such as forces, moments etc.) cannot be computed or are incomplete in recording fragments in w...

This paper presents an application of built-in sensors of a mobile device – a more robust version of authors’ own motion type detection method introduced in previous work. Use of accelerometer and magnetometer for recording acceleration in the World’s coordinate system is explained. The original results and identification criteria are briefly descr...

Introduction. Characteristics of pain complaints of patients have changed. Currently, more and more patients report pain in the temporomandibular joint (TMJ) area that result from excessive tension of the muscles in the masticatory system. They need complex treatment including trigger point release therapy that is one of the leading methods used in...

The article presents selected modern 3D technologies (a motion capture system, forceplates) that can be used to examine the biomechanics of motorsports drivers. The aim of this paper is to prove the following thesis:“modern 3D technologies allow for precise and objective biome-chanical analysis of motorsports drivers as a complement to psychomotor...

The paper presents a purpose-built laboratory stand consisting of a Vicon motion capture system with reference video cameras, wireless EMG system, Concept 2 Indoor Rower ergometer, wireless heart rate monitor and the Nexus software. A pilot study of people who exercise on the ergometer helped to create a proper configuration of all the components o...

Artykuł przedstawia możliwości zastosowania urządzeń mobilnych jako rejestratorów przyspieszenia. Wykonane badania dotyczą użycia urządzeń działających na trzech platformach mobilnych: Android, iOS oraz Windows Phone. W tym celu stworzono trzy odrębne aplikacje mobilne, przy pomocy których mierzone jest przyspieszenie w trzech kierunkach (X, Y, Z)....

This paper presents the reengineering of the Computer Science (CS) curriculum according to market needs. The new ACM-IEEE Computing Curricula 2013 in context of changes is presented. Next, the situation in ICT industry in EU, lack of ICT specialists and methods of acquisition the information about required competences as well as some results are de...

The article concerns the problem of educating the future employees who should meet the current ICT companies’ needs. It is a long lasting process during which ICT requirements change very often. Due to very fast technology development, this problem is very hard to solve. Employees needs people who possess high professional competences in the modern...

W latach 2011-2012 realizowany był na Wydziale Elektrotechniki i Informatyki (WEiI) Politechniki Lubelskiej projekt POKL „Absolwent na miarę czasu” skierowany do studentów studiów magisterskich kierunku Informatyka. Wśród celów realizowanego projektu ważne miejsce zajmuje utworzona platforma e-learningowa. W niniejszym artykule omówiono obecny stan...

The Near Field Communication (NFC) technology is a new rising trend in mobile applications. This paper discusses basics of NFC technology, and a key scenarios, which include mobile payments, device communication and “smart” marketing posters.