Jerzy Montusiewicz

LOOKING FOR THE OPTIMAL LOCATION FOR WIND FARMS

Currently, wind power is a leader in the renewable energy sector. One of the many advantages of the development of renewable energy sources is small harm to the environment. Nevertheless, in order to install a wind farm we must overcome a number of obstacles associated with it. One of the many stages of the construction of wind turbines is designing its proper location. It is a very complex process, in which a number of criteria must be analysed, often hardly comparable with each other and even contradictory. The paper presents the concept of selecting a wind farm location using multicriteria optimisation methods.

MOTION CAPTURE AS A MODERN TECHNOLOGY FOR ANALYSING ERGOMETER ROWING

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 of the laboratory. Moreover, a procedure for carrying out research was developed, which consists of several steps divided into 4 stages: preparation of the motion acquisition system; preparation of the participant; familiarising participants with the technique of rowing, recording their movements and acquiring other measurement signals. Preliminary analysis of the results obtained from heterogeneous signals from various devices showed that all the components of the research stand are mutually compatible and the received signals do not interfere with one another.

Analysis of rowing based on handle trajectory

The paper presents an analysis of a rowing technique and the participants fatigue based on the handles 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 rowing” and (ii) “the rowing technique may be assessed by analysing the handle trajectory” were proven. The presented research concerns the following aspects: (i) handle trajectory analysis in a designated range (specified by two markers positions attached to the ergometer), (ii) duration analysis of the incorrect rowing technique (in time domain), (iii) tilt analysis based on the angle of the handles position relative to the floor (determined using two markers attached to the handle) and (iv) handles velocity analysis (determined using one marker attached to the handle). The participants fatigue is indicated by two analysed factors: stroke time and the handles velocity. The research concerns three stages of rowing selected in a way that the different fatigue phases were expected to be visible. The average stroke time increases in the following stages: by 0.13 second and by 0.6 second respectively. While rowing, the handles velocity is decreased. The rowing technique is described by parameters such as: the proper handles position within set boundaries, the surface area encompassed by the handles trajectory outside the designated range, time of the incorrect rowing technique and the handles tilt. The surface area clearly shows that in the final stages the movements are more incorrect than initially. The mean values of the tilt indicate that due to the fatigue the technique worsens in the middle and the final rowing stages. It is observed the participants tilt the handle to the right while rowing. It clearly indicates irregular forces acting on the handle. There is a difference in muscle strength of both arms in the participants of this research.

Analysis of Selected Elements of a Rower’s Posture Using Motion Capture – a Case Study

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 phases of rowing and in different degrees of fatigue. The back’s position during rowing was recorded using three markers: one being a component of the Plug-in Gait model (T10) and two additional ones (marked as S1 and S2). The results obtained with the motion capture system allow to clearly identify the degree of training of the subjects studied, their fatigue and rowing technique on the basis of the analysis of changes in the inclination of the back in different positions of the successive phases of rowing.

The Cloud Computing Stream Analysis System for Road Artefacts Detection

The paper presents the cloud computing system designed for monitoring the state of roads by processing data packages covering such data as the car’s acceleration and position acquired by mobile devices (smartphones and tablets) mounted in cars and implemented on IBM BlueMix platform. Such data are being directly sent to the cloud system, where they are being saved and processed online. The system is capable of performing the authors’ pothole detection algorithm which is characterized by high detection rate, but on continuously arriving data. Finally, the system is presenting its results in the form of website and data packages sent back to mobile devices.

Identifying Road Artefacts with Mobile Devices

In this paper, the concept of monitoring the state of roads by means of standard mobile devices (smartphones) is discussed. Using motion data from the device’s sensors - accelerometer, gyroscope, compass - and in coordination with the current location from the Global Positioning System devices, it is possible to track and log any abnormal motion which may signal possible road infrastructure problems. The authors describe the software solution created to gather motion data, as well as the results of an experiment with a real-life car and real roads in different conditions. A pilot study carried out allows to test a developed application which provides precise localization of the artefacts occurring on the road.

The use of RFID technology to control a 3D model realising the gamification paradigm

The paper presents the development process of the 3D game based board with the use of RFID technology. The digital wireless RFID technology as a way of realisation of gamification paradigm was presented. The measurements were performed in different scenarios: one without the additional material and the second one with plywood between devices. The study focused on 3D board game implementation and measurements of the influence of material on proper communication between the RFID tag and interrogator.

The “Architectural Jewels of Lublin” Game as a Tool for Collaborative Interactive Learning of History

The city of Lublin in Poland is a place of many overlapping cultures and religions: Polish, Russian, Ukrainian, Armenian, Jewish, German, etc. Remains of these cultures are present in the city space in the form of architectural monuments. Unfortunately, the awareness of this fact disappears in society, especially among the school youth.

Algorithm Defining the Correctness of an Ergometer Rower’s Technique Using Three-Dimensional Data

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 practicing on the Concept II Indoor Rower ergometer, using a motion capture system produced by Vicon. The data obtained with the motion capture system and the results generated with the proposed algorithm(s) allow to clearly identify the studied subjects’ degree of training and rowing technique on the basis of the analysis of changes in the inclination of the body parts in different phases of rowing.

AN APPROACH TO COMPUTER-AIDED RECONSTRUCTION OF MUSEUM EXHIBITS

The article discusses the possibility of using 3D laser and 3D structured light scanning technology to support the restoration of museum objects and presents the concept of applying techniques of 3D scanning and CAD processing to create a model of the missing fragment of a museum object, based on scans of the damaged surface and fragments of the object with a similar shape. The resulting model can be used as a base element in the restoration of the original shape of the artifact, both virtually and in reality. The paper also presents the proposal of a process of reconstructing a missing fragment model of an actual museum object (an exhibit from the Zamoyski Museum in Kozłówka) using the method in question and mobile 3D scanning equipment.