Wyniki wyszukiwania - BazTech

1

Relationship of lumbar-hip kinematics during trunk flexion and sex, body mass index, and self-reported energy expenditure: a cross-sectional analysis

Zawadka Magdalena, Smołka Jakub, Skublewska-Paszkowska Maria, Łukasik Edyta, Zieliński Grzegorz, Gawda Piotr

Acta of Bioengineering and Biomechanics

|

2023

|

Vol. 25, no. 1

56--64

EN

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 movement in a group of young asymptomatic people who met PA guidelines. Young people can be identified as a future risk group of civilisation diseases and lumbar-hip kinematics can be considered as a predictor of LBP occurrence. The aim of this study was to identify the association of gender, self-reported energy expenditure, body mass index, and lumbar-hip kinematics in young people. Methods: Sixty-four students at pre-employment stage participated in the study. They declared moderate-to-high PA and activity-induced energy expenditure (AEE) was self-reported. Kinematic data of the lumbar spine, pelvis and hip were collected during forward bending using a 3D motion ca pture system. Results: Sex was found to be associated with pelvis ( = –0.38 p = 0.002) and lumbar mobility ( = 0.49, p < 0.001) during forward bending and BMI was related only to lumbar mobility ( = –0.41, p = 0.001). Recreation AEE significantly predicted hip flexion mobility ( = 0.38, p = 0.002). Conclusions: This study showed that among a sample of physically active young people, BMI, self-reported AEE and sex can partially predict lumbar-hip kinematics during trunk flexion. Recreational PA can be regarded as improving hip mobility and thus making forward bending more effective and less prone to injury.

2

Vertical Breast Displacement in Asian Women During Exercise: influence of Bra Type, Size and Different Parts of the Breast

Sheng Xinyang, Chen Xiaona, Lake Mark John

Fibres & Textiles in Eastern Europe

|

2022

|

Vol. 30, no. 3

1--8

EN

Asian women have smaller breast sizes and greater breast density, which suggests specific research on their breast kinematics and biomechanics. To investigate vertical breast displacement of Asian women among exercise modalities (rope skipping, walking, jogging, running) in different support conditions (wearing everyday bra or sports bra), and assess the motion between different parts of the breast, seven participants were selected to participate in this study. Five infrared markers were placed on each of their left breasts, and a three-dimensional motion capture system (NDI Optotrak Investigator) was used to collect the data on vertical breast displacement during walking (5 km/h), jogging (7.5 km/h), running (10 km/h) and rope skipping (2 Hz). No significant difference was found in the vertical displacement of different parts of the breast in the two bra conditions. Also, there was significant difference in vertical breast displacement among rope skipping, jogging and running. Breast size did not significantly affect its vertical displacement. The smaller, denser breast appears to reach a threshold of vertical displacement that is similar at high severities of dynamic exercises (jogging, running and rope skipping). The results might be useful for designing special sports bras for Asian women with small breasts or rope skipping participants to improve the shock absorption function.

3

Badania wpływu zaawansowanej technologicznie odzieży ochronnej na stan psychofizyczny człowieka

Dąbrowska Anna, Bartkowiak Grażyna, Krzemińska Sylwia, Greszta Agnieszka, Kobus Monika

Bezpieczeństwo Pracy : nauka i praktyka

|

2022

|

nr 9

20-25

PL

Integracja mikroelektroniki i elektroniki noszonej ze środkami ochrony indywidualnej, w tym z odzieżą ochronną, z jednej strony sprawia, że można uzyskać zupełnie nowe funkcje tych środków, jednak z drugiej strony niewłaściwe ich zaprojektowanie może być potencjalnym źródłem zagrożenia dla użytkownika, np. przez spowodowanie nad miernego obciążenia psychofizycznego. Z tego względu niezbędne jest badanie odzieży ochronnej wyposażonej w elektronikę noszoną pod kątem jej wpływu na obciążenie psychofizyczne człowieka. W Centralnym Instytucie Ochrony Pracy - Państwowym Instytucie Badawczym podjęto działania w kierunku opracowania nowej metodyki badań, która pozwoliłaby ocenić wpływ aktywnej odzieży ochronnej, w tym z wbudowanymi czujnikami i modułami mikro elektronicznymi, na obciążenie psychofizyczne jej użytkownika w symulowanych warunkach przewidywanego stosowania.

EN

The integration of microelectronics and wearable electronics with personal protective equipment (PPE) means that, on the one hand, completely new functions can be achieved, but on the other hand, their inappropriate design may be a potential source of danger for the user, e.g. by causing excessive psychophysical burden. For this reason, it is necessary to test protective clothing equipped with wearable electronics in terms of its impact on the psychophysical load of a human being. At the Central Institute for Labour Protection - National Research Institute, efforts were made to develop a new research methodology that would allow to fully investigate and evaluate the impact of smart protective clothing, including those with built-in sensors and microelectronic modules, on the psychophysical load of its user under simulated conditions of intended use.

4

Application of artificial neural networks in fall prediction

Walczak Tomasz, Sopa Martyna, Pogorzała Adam M.

Vibrations in Physical Systems

|

2021

|

Vol. 32, nr 2

art. no. 2021210

EN

The problem of fall is still unsolved even though it is a serious problem, especially in group of elderly. Also, another difficulty is to analyse falls that occur in day-to-day life. Those events are hard to observe by specialists and so it is hard to analyse them. Following work contains a description of experimental process for external force-caused fall observation with the use of motion capture system and dynamometric platforms. Data collected according to this protocol were later used for time series neural networks. Obtained results of analysis were compared to popular model of human stability. Conducted inquiry proves that it is possible to detect fall even before it occurs and while it is external force-caused fall the loss of stability develops earlier than it was assumed.

5

The application of topological data analysis to human motion recognition

Żelawski Marcin, Hachaj Tomasz

Technical Transactions

|

2021

|

Vol. 118, iss. 1

art. no. e2021011

EN

Human motion analysis is a very important research topic in the field of computer vision, as evidenced by a wide range of applications such as video surveillance, medical assistance and virtual reality. Human motion analysis concerns the detection, tracking and recognition of human activities and behaviours. The development of low-cost range sensors enables the precise 3D tracking of body position. The aim of this paper is to present and evaluate a novel method based on topological data analysis (TDA) for motion capture (kinematic) processing and human action recognition. In contrast to existing methods of this type, we characterise human actions in terms of topological features. The recognition process is based on topological persistence which is stable to perturbations. The advantages of TDA are noise resistance and the ability to extract global structure from local information. The method we proposed in this paper deals very effectively with the task of human action recognition, even on the difficult classes of motion found in karate techniques. In order to evaluate our solution, we have performed three-fold cross-validation on a data set containing 360 recordings across twelve motion classes. The classification process does not require the use of machine learning and dynamical systems theory. The proposed classifier achieves a total recognition rate of 0.975 and outperforms the state-of-theart methods (Hachaj, 2019) that use support vector machines and principal component analysis-based feature generation.

6

Stereophotogrammetry measurement of kinematic target effect as speed accuracy benchmark indicator for kicking performance in martial arts

Wąsik Jacek, Mosler Dariusz, Ortenburger Dorota, Góra Tomasz

Acta of Bioengineering and Biomechanics

|

2021

|

Vol. 23, no. 4

117--125

EN

Purpose: The development of a motion capture system leads to fast and accessible ways of precise testing of athletes and their motor abilities. The striking performance in martial arts and combat sports requires measuring velocity in the context of successful contact with the target. The aim of this study was to present the novel kinematic target effect coefficient and its possible use as a speed accuracy benchmark of performance based on the example of taekwon-do roundhouse and frontal kicks. Methods: The stereophotogrammetry motion capture setup consists of 10 infrared cameras (NIR Vicon MX-T40). Analysis includes 180 kicks (roundhouse and frontal kicks) performed by 15 adult participants on a master level in taekwon-do. The kinematic target effect comparison includes two targets – a training shield and a table tennis ball hanging from the ceiling. Markers were placed on the lower extremities of participants. Spatial-temporal variables were registered for both kicking legs, techniques, and target types. Results: Both roundhouse and frontal kicks revealed target and marker dependent differences during its execution. The kinematic target effect coefficient values differ for the specific marker and kick type. Conclusion: The wireless motion capture systems could be helpful in the training process and an athlete’s evaluation before sports competitions.

7

Assessment of the functional movement screen test with the use of motion capture system by the example of trunk stability push-up exercise among adolescent female football players

Mrozek Agata, Sopa Martyna, Myszkowski Jakub, Bakiera Aleksandra, Budzisz Piotr, Kuliberda Agata, Białecka Martyna, Walczak Tomasz, Grabski Jakub Krzysztof, Grygorowicz Monika

Vibrations in Physical Systems

|

2020

|

Vol. 31, nr 2

art. no. 2020220

EN

The paper presents the application of the BTS motion capture system to verify the FMS test assessment. The research group consisted of adolescent female football players who underwent standard FMS assessment by a physiotherapist. In order to objectify the physical performance assessment, a mechanical model was proposed, on the basis of which the parameters supporting the evaluation of the test were defined. The example of the analysis of one of the exercises (push-ups) presented in the paper showed that even the players who obtained the highest marks in the test do not always perform the exercises flawlessly, which is a consequence of subjective assessment made by specialists. The use of a motion capture system together with an appropriate biomechanical model allows for a much more objective assessment of the physical performance and detecting any dysfunction of the movement apparatus of the examined persons.

8

Design and evaluation of a SteamVR tracker for training applications – simulations and measurements

Maciejewski Marcin, Piszczek Marek, Pomianek Mateusz, Pałka Norbert

Metrology and Measurement Systems

|

2020

|

Vol. 27, nr 4

601--614

EN

Virtual reality (VR) has become a realistic alternative to conventional learning methods in numerous fields including military training. Accurate and precise tracking of a user wearing a head-mounted display is necessary to achieve an immersive VR experience. The widely available SteamVR system, where licensed users can design and construct trackers optimized for a given application can be an alternative to very expensive professional motion tracking. This paper presents the complete design process of a SteamVR tracker dedicated to a shooting simulation in a VR environment. We describe the optimization and simulation of the tracker’s shape and configuration of the sensors. In the simulation phase the developed model had better parameters than its commercial counterparts. Next, the optimized prototype was constructed and configured. The dedicated and automated measuring arrangement provided experimental verification of the tracker’s performance. Tracking performance as well as the accuracy and precision of both position and orientation measurements were determined and compared with simulations, which proved that the simulation software can accurately predict selected properties of the proposed tracker.

9

Which of the five classical ballet positions is the most demanding for the dancer’s body? An electromyography-based study to determine muscular activity

Gorwa Joanna, Kabaciński Jarosław, Murawa Michał, Fryzowicz Anna

Acta of Bioengineering and Biomechanics

|

2020

|

Vol. 22, no. 4

3--14

EN

The study aimed to determine which of the five classical ballet positions is the most demanding regarding muscular activity, values of external rotation in the hip joints, angular values of foot progression as well as the inclination (tilt) of the pelvis in the sagittal plane. Methods: In this cross-sectional study, 14 female pre-professional ballet dancers (aged 11–16) participated. Participants were tasked with the sequential adoption of five classical ballet positions (CP1–CP5). The electromyographic activity of the muscles of the trunk and the lower limb was recorded with surface electrodes. Kinematic data including hip and knee external rotation, foot progression angle and pelvic tilt were collected using a motion capture system. Results: Symmetric positions CP1 and CP2 were not as demanding as asymmetric CP3–CP5. Higher values of hip and foot external rotation without greater muscular effort in CP2 than CP1 was noticed. Considering asymmetric positions, CP3 did not trigger a greater activity of hip or foot muscular groups than CP4 and CP5. CP4 was characterised by the greatest pelvic anterior tilt and the lowest activity of GM in the forward lower limb. In CP5, forward lower limb entailed a higher activity of muscles supporting the foot than in the remaining positions. Conclusion: In terms of biomechanics, the most demanding classical ballet position in pre-professional dancers is CP4, followed by CP5, CP3, CP1 and CP2. This finding can be applied in educational methodology of dancers, figure skaters, synchronized swimmers, acrobatic gymnasts, rhythmic gymnasts or cheerleaders.

10

Biomechanical evaluation of swing-through crutch gait in patients with lower extremity injury

Rzepnicka Agata, Kabaciński Jarosław, Murawa Michał, Fryzowicz Anna, Syczewska Małgorzata, Dworak Lechosław Bogdan

Acta of Bioengineering and Biomechanics

|

2020

|

Vol. 22, no. 1

111--117

EN

The main purpose was to determine the values of spatio-temporal parameters and ground reaction forces during the swingthrough crutch gait. Methods: Eighteen male patients with unilateral injury within the foot, ankle or shank (age: 25.4 ± 7.7 years, body height: 1.79 ± 0.06 m, body mass: 76.1 ± 11.5 kg) participated in the study. In the experiment, 6-camera optoelectronic motion capture system and force platform were used. The measurements of spatio-temporal parameters and ground reaction force (GRF) were performed for uninjured lower extremity (ULE), crutch on the ULE side (CrU) and crutch on the injured lower extremity side (CrI). Results: Analysis demonstrated a significantly longer stance phase and a significantly shorter swing phase for ULE than crutches ( p < 0.05), and a significantly longer first, compared to the second, double support phase ( p < 0.05). Comparisons showed also significantly higher maximum values of the vertical GRF and extreme values of the horizontal antero-posterior GRF for ULE than crutches ( p < 0.05) as well as for CrI than CrU ( p < 0.05). Conclusions: The present study provides biomechanical data related to the spatio-temporal parameters and GRFs for the swing-through crutch gait in patients with the lower extremity injuries.

11

Wykonywanie nagrań za pomocą systemu akwizycji ruchu oraz urządzenia mobilnego z synchronizacją wyzwalania nagrań

Walczyna Karol, Jasiński Bartosz, Smołka Jakub, Miziołek Mateusz

Journal of Computer Sciences Institute

|

2019

|

Vol. 10

5--11

PL

Głównym problemem podczas przeprowadzania badania z użyciem systemu motion capture wraz z urządzeniem mobilnym jest brak możliwości jednoczesnego startu nagrywania z systemu akwizycji ruchu, jak i z urządzenia przenośnego typu smartfon. Na potrzeby rozwiązania problemu zostały opracowane dwie metody synchronizacji nagrań. Pierwsza z nich to metoda rozpoczynająca nagrywanie po stronie urządzenia mobilnego, natomiast druga to metoda wychwytująca rozpoczęcie nagrywania w systemie akwizycji ruchu. Obie metody zostały porównane pod kątem opóźnień oraz korelacji zebranych danych pochodzących z urządzenia mobilnego oraz systemu Vicon Nexus.

EN

The main problem during research with a motion capture system and mobile device is lack of possibility to simultaneously begin recording on the motion capture system and a mobile device. Two methods were developed to solve this problem. In the first method the recording is started on the mobile phone and the motion capture system is notified, in the second method the motion capture system starts recording and notifies the mobile device. Both of them were compared for lags and correlation of data form the mobile device and the motion capture system.

12

Metoda synchronizacji i obróbki danych pozyskanych z różnych zestawów czujników inercyjnych na potrzeby analizy chodu człowieka

Góźdź Aleksandra, Kalinowski Maciej, Kopniak Piotr

Journal of Computer Sciences Institute

|

2018

|

Vol. 9

345--349

PL

W artykule przedstawione zostały wyniki badań dotyczących synchronizacji danych pozyskanych z dwóch systemów akwizycji ruchu na potrzeby analizy chodu człowieka. Oba systemy to zestawy czujników inercyjnych firmy Xsens: MT Awinda i Xbus Kit. W artykule omówiony zostanie format pliku do zapisu danych uzyskanych z pomiarów, oraz opracowana metoda synchronizacji pomiarów pochodzących z obydwu zestawów. W wyniku przeprowadzonych badań udało się także ujednolicić dane generowane przez czujniki umiejscowione w różnych miejscach na ciele człowieka do jednego układu odniesienia. Opracowana metoda zapewnia także progresywne przetwarzanie wartości kątów z zakresu od -180° do 180° na wartości bezwzględne w stosunku do położenia początkowego czujników.

EN

The article talks about results of data synchronization measurements sourced from two recording gait systems for human gait analyses. Two systems are Xsens sensor kits: MT Awinda, Xbus Kit. The article cover file format used to save data and synchronization method for sensor measurement from above mentioned kits. On the basis of the studies carried out, sensor measurement from different places on human body are unify to a common frame of reference. The discussed method provides also progressive data processing for angles range from -180° to 180° conversion to the absolute angle value from initial sensor settings.

13

Use of motion capture in assisted of knee ligament injury diagnosis

Bednarski R., Bielak A.

Journal of Applied Computer Science

|

2018

|

Vol. 26, nr 1

7--32

EN

This study treats of the use of motion capture systems as the help diagnose knee injuries. It consists of the theoretical work and the application. The written work describes a course of research includes choice of research group, selection of appropriate exercises, find useful computational methods, description created for research applications and summary results. The practical part was to create an application for physiotherapists which could help them to diagnosis potential pathology of the knee. The purpose of this study was to test whether a motion capture system dedicated to entertainment can be used in the medical aspect. This system was test for selected methods and determined to be suitable for supporting the diagnosis of knee injuries. Otherwise it has to be written what was the reason of failure. The results of the study were that after trial and error methods peeled action and created application proved helpful.

14

Architektura wizyjnych systemów pomiarowych do zastosowania w interaktywnych środowiskach wirtualnych

Grabowski A., Jankowski J., Kwoczak W.

Przegląd Mechaniczny

|

2017

|

nr 6

63--65

PL

Przeprowadzenie interaktywnej symulacji wymaga zbierania w czasie rzeczywistym informacji o położeniu wybranych obiektów, takich jak dłonie i głowa, a także przedmiotów wykorzystywanych w trakcie symulacji. W takich sytuacjach cenna jest możliwość wykorzystania pasywnych znaczników oraz brak ograniczenia liczby przedmiotów, których ruch jest monitorowany Takie zalety mają systemy wizyjne składające się z wielu kamer, których liczba jest zależna od skanowanej objętości. W artykule przedstawiono architekturę tego typu systemu pomiarowego.

EN

Conducting interactive simulation requires the real-time motion capture system gathering Information about the location of selected objects, such as hands and head, as well as items used during the simulation. In such systems ability to use passive tags is important, because there is no strict limit to the number of observed objects. Such advantages have vision systems consisting of multiple cameras, the number of which depends on the scanned volume. The paper presents the architecture of this type of measurement system.

15

Metoda docinania faz ruchu podczas wiosłowania na ergometrze na podstawie danych trójwymiarowych

Kowalczyk Kacper, Skublewska-Paszkowska Maria

Journal of Computer Sciences Institute

|

2017

|

Vol. 5

155--158

PL

W artykule przedstawione zostały metody modyfikacji danych motion capture w formacie C3D oraz analiza modyfikacji danych przy pomocy autorskiej aplikacji. Aplikacja służy do wczytywania plików w formacie C3D z zarejestrowanym ruchem i automatycznego wycięcia powtarzających się, podobnych sekwencji nagranego ruchu. Analizę przeprowadzono pod kątem porównania ze sobą otrzymanych wyciętych faz ruchu. Pod uwagę brane były długości poszczególnych faz, odległości maksymalne i minimalne pomiędzy badanymi markerami oraz porównywane startowe i końcowe klatki ruchu.

EN

The article presents both the methods of data modification of motion capture data in C3D file format, and the analysis of the modification of motion capture data using implemented application. The application is used to load C3D files with recorded motion and to automatic cut of the repeating, similar sequences of recorded motion. The analysis was conducted in terms of comparing received cut phases of motion. Study include cases such as length of particular phases, maximum and minimum distance between examined markers and comparison of start and final motion frames.

16

A method for visualization of 3D motion data using a mobile device

Oseńko M., Smołka J., Skublewska-Paszkowska M., Łukasik E.

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska

|

2017

|

T. 7, nr 3

37--42

EN

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, analysis of existing solutions, presentation of the proposed method, its implementation and results.

PL

Wizualizacja ruchu 3D jest zagadnieniem silnie związanym z przechwytywaniem ruchu. Dane wyjściowe przechwytywania posiadają wiele formatów, jednym z nich jest format C3D. Niniejszy artykuł przedstawia innowacyjną metodę wizualizacji danych ruchu, uzyskanych z plików C3D, w wirtualnej rzeczywistości, z wykorzystaniem Google Cardboard. Wiązać się to będzie z wprowadzeniem w użyte technologie, przeprowadzeniem analizy istniejących rozwiązań i przedstawieniem projektu, implementacji nowej metody oraz jej wyniku.

17

Kinetyczna morfogeneza: generatywny system rozwoju strukturalnego w oparciu o interaktywne przechwytywanie ruchu

Nisztuk M.

Architectus

|

2017

|

Nr 4 (52)

49--64

PL

Niniejszy artykuł przedstawia zasady i cele projektu Kinetyczna morfogeneza starającego się opisać ruch człowieka poprzez interaktywny system przechwytywania ruchu i tworzonej generatywnie geometrii na podstawie rzeczywistego kontekstu przestrzennego. Artykuł opisuje proces opracowania wytycznych dotyczących aplikacji, prezentuje efekty działania pierwszego prototypu, a także wskazuje kierunki dalszych prac badawczych. Celem opracowania jest odnalezienie i opisanie piękna form biologicznych powstających w oparciu o ruch człowieka. Najważniejszym aspektem badań jest czysta eksploracja formy oraz zacierającej się granicy między realnym, materialnym światem a przestrzenią wirtualną. Głównym zakładanym rezultatem projektu jest znalezienie różnorodnych możliwości generatywnej wizualizacji procesów w czasie rzeczywistym poprzez narzędzia interaktywne. Przeprowadzone badania oraz analiza rezultatów doprowadziła do lepszego zrozumienia relacji przestrzennych między ludzkim ciałem a rzeczywistym/wirtualnym kontekstem przestrzennym i odnalezienia nowych możliwości interakcji między środowiskiem generatywnym (proces cyfrowy, w którym obiekt generatywny ma szansę zaistnieć; stanowi zbiór zasad, skryptów, algorytmów określonych przez projektanta; zawiera w sobie również moduł ewaluacji, pozwalający oceniać wartość estetyczną danego obiektu generatywnego przez projektanta) a kontekstem fizycznym.

EN

The article outlines the principles and goals of the research project Kinetic morphogenesis trying to describe human movement through interactive motion capture and generative geometry based on real spatial context. In addition, the article describes the process of design guidelines development, demonstrates the effects of the first prototype, and outlines the direction of further research related to the project. The aim is to find the beauty in biological forms which arise based on human movement. The research here is about pure form finding and blurring the boundary between real, material world and virtual space. The main assumed outcome is the exploration of various possibilities of generative process visualization in real time through an interactive tool. Additional findings resulted in better understanding of spatial relations between the human body and real (or virtual) spatial context. In addition, exploration of new possibilities of interaction between generative environment (a digital process in which the generative object has a chance to occur; is a set of rules, scripts or algorithms specified by the designer. It also has a module of evaluation which allows assessing the aesthetic value of the generative object) and real context.

18

Evaluation of reliability and concurrent validity of of two optoelectric systems used for recording maximum vertical jumping performance versus the gold standard

Słomka K. J., Sobota G., Skowronek T., Rzepko M., Czarny W., Juras G.

Acta of Bioengineering and Biomechanics

|

2017

|

Vol. 19, no. 2

141--147

EN

The objective of this study was to evaluate the reliability and validity of two alternative systems used for jumping performance measurement. Methods: Two groups of subjects were tested. The first group consisted of 15 male adults (21.3 ± 1.7 years ) and the second group consisted of 16 female volleyball players (17.2 ± 0.9 years). We used three different systems of data collection in the study. Two of the used systems are based on optoelectric components. The Optojump Next system is referred to as the optoelectric system, and BTS Smart-E is refered to as the video system. Concurrent validity of these systems was verified with the use of “gold standard” which is force platform. All systems were used to estimate the height of vertical jumps. Results: Both optoelectric systems occurred to be highly reliable with the ICCs=0.98 for Optojump and 0.9 for BTS Smart. Their concurrent validity with the force platform data was also very high r=0.99 and r=0.97 respectively. Conclusions: Comparison of these two systems shows distinct differences between them where Optojump system is more suitable for quick and reliable sports testing, when BTS-Smart for research and clinical testing.

19

Concept of an augmented virtuality marine simulator

Gralak R., Muczyński B., Terczyński R.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

|

2016

|

nr 45 (117)

60--68

EN

This paper presents the assumptions for the concept of a full mission ship’s bridge simulator prototype using innovative augmented virtuality technology. A description of a possible development process is provided as well as two potential applications in the field of marine simulation: operator motion tracking techniques, MoCap, which entails interacting with the environment and generating of synthetic images via HUD; and implementation of the latest technology, data gathering and analysis methods, which would replace current visualization methods and equipment used in maritime simulators.

20

Influence of additional loads on chosen gait parameters and muscles activity

Ludwicki M., Zagrodny B., Wojnicz W., Mrozowski J., Awrejcewicz J.

Vibrations in Physical Systems

|

2016

|

Vol. 27

227--236

EN

This paper is devoted to human motion analysis and comparison of chosen kinematics parameters during normal gait with and without additional load in a form of backpack. A stability in both cases were compared in both frontal and sagittal planes, by applying a video tracking system. Experimental tests performed on treadmill, passive markers, placed on volunteers bare skin were used. Additionally, an infra-red camera was employed to evaluate muscle activity and its groups involved in the movement. The change of body temperature and distribution of the thermal maps were observed. Analysing these thermograms, loading of different muscle groups was evaluated. During the experiment, an attempt to correlate a results obtained from a thermal imaging camera and video tracking system were made. It is shown that thermal imaging can help to evaluate an asymmetry in muscle load and in some cases can help to detect pathological cases, what was confirmed with motion analysis. Advantages and disadvantages of this method were also described.