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

Structural, Electronic, and Transport Properties of Hybrid SrTiO3-Graphene and Carbon Nanoribbon Interfaces

Hybrid materials composed of different functional structural units offer the possibility of tuning both the thermal and electronic properties of a material independently. Using quantum mechanical calculations, we investigate the change in the electronic and thermoelectric transport properties of graphene and hydrogen-terminated carbon nanoribbons (CNRs) when these are placed on the SrTiO3 (001) surface (STO). We predict that both p-type and n-type composite materials can be achieved by coupling graphene/CNR to different surface terminations of STO. We show that the electronic properties of graphene and CNR are significantly altered on SrO-terminated STO but are preserved upon interaction with TiO2-terminated STO and that CNRs possess distinct electronic states around the Fermi level because of their quasi-one-dimensional nature, leading to a calculated Seebeck coefficient much higher than that of a pristine graphene sheet. Moreover, our calculations reveal that in the TiO2-SrTiO3/CNR system there is a favorable electronic level alignment between the CNR and STO, where the highest occupied molecular orbital of the CNR is positioned in the middle of the STO band gap, resembling n-type doping of the substrate. Our results offer design principles for guiding the engineering of future hybrid thermoelectric materials and, more generally, nanoelectronic materials comprising oxide and graphitic components

Development of the normalization method for the Jagiellonian PET scanner

This work aims at applying the theory of the component-based normalization to the Jagiellonian PET scanner, currently under development at the Jagiellonian University. In any positron emission tomography acquisition, efficiency along a line-of-response can vary due to several physical and geometrical effects, leading to severe artifacts in the reconstructed image. To mitigate these effects, a normalization coefficient is applied to each line-of-response, defined as the product of several components. The specificity of the Jagiellonian PET scanner geometry is taken into account. The results obtained from the GATE simulations are compared with the preliminary results obtained from the experimental data

Two species of true morels (the genus Morchella, Ascomycota) recorded in the Ojców National Park (south Poland)

In this paper, we present results of survey on the occurrence of true morels, conducted in the Ojców National Park (ONP). The first data about true morels from the area of the ONP date back to the nineteenth century. However, despite multiple surveys in the next decades, their presence has not been confirmed. Therefore, true morels were thought to be extinct in the ONP. In 2014 and 2015, two morphotypes of true morel fruiting bodies were discovered in two sites, identified as black morels and yellow morels. In 2016, we collected three fruiting bodies for detailed morphological characterization and molecular identification. According to our results, these morels were identified as Morchella deliciosa and Morchella esculenta. Our finding is the first confirmation of the occurrence of both species (as they are presently recognized) in Poland

Wiatr fenowy jako sezonowy czynnik ryzyka samobójstwa w regionie górskim

Cel: Przekonanie, że wiatr fenowy ma wpływ na samobójstwa, jest mocno zakorzenione w lokalnej kulturze w różnych regionach górskich świata, niemniej jednak dane naukowe dotyczące tego tematu są ograniczone. W niniejszej pracy badano hipotezę możliwej zależności między halnym (wiatr typu fenowego występujący w polskiej części Tatr) a ryzykiem samobójstwa. Metoda: Dokonano analizy liczby samobójstw odnotowanych w latach 1999-2014 przez urząd Policji w powiecie tatrzańskim w kontekście dobowych danych meteorologicznych. Fen zdefiniowano jako zespół różnych czynników meteorologicznych, w tym zmiany ciśnienia powietrza, temperatury, wilgotności, zachmurzenia, prędkości i kierunku wiatru. Zostały wzięte pod uwagę dni, w których pojawiły się warunki sprzyjające wystąpieniu wiatru halnego, oraz dwa dni poprzedzające zjawisko. Obliczono względne ryzyko samobójstwa. Wyniki: W okresie badania zarejestrowano 210 przypadków samobójstw, z czego 14,5% miało miejsce w dniach ze zjawiskami fenowymi. Wskaźnik samobójstw był podobny przez cały rok, niezależnie od pory roku. Halny nie zmienił ogólnego dobowego ryzyka samobójstwa, jednak mógł mieć wpływ na sezonowe ryzyko samobójstwa (p < 0,05). W dwóch grupach wiatru fenowego względne ryzyko zwiększyło się ponadczterokrotnie w okresie letnim i dwukrotnie w okresie jesieni, a wiosną obniżyło się dziesięciokrotnie. Wniosek: Brak jednoznacznych powiązań pomiędzy występowaniem halnego a samobójstwami. Wiatr fenowy mógł zwiększać ryzyko samobójstwa w Tatrach w okresie letnim i jesiennym analizowanego okresu. Konieczne są dalsze badania, aby wytłumaczyć możliwy związek wiatrów fenowych ze zgonami samobójczymi oraz aby wykorzystać wyniki tych badań do działań z zakresu zapobiegania samobójstwom w regionach górskich.Objective: The belief that the foehn wind has an impact on suicide is firmly rooted in local culture in various mountain regions of the world, but scientific data on this subject are limited. In this study, the hypothesis of a possible relationship between Halny (foehn type wind occurring in the Polish part of the Tatra Mountains) and the risk of suicide was examined. Method: The number of suicides recorded in the years 1999-2014 by the Police Office in the Tatra region in the context of diurnal meteorological data was defined. Foehn was defined as a set of various meteorological factors, including changes in air pressure, temperature, humidity, cloud cover as well as wind direction and speed. The days on which favourable conditions for the occurrence of the foehn wind and the two days preceding the phenomenon were taken into account. The relative risk of suicide was calculated. Results: 210 cases of suicides were recorded during the study period, of which 14.5% occurred on the foehn wind day. The suicide rate was similar throughout the year, regardless of the season. Halny did not change the overall daily risk of suicide, but could have had an impact on the seasonal risk of suicide (p < 0.05). In two groups of foehn wind, relative risk increased more than fourfold in summer and twice in autumn, and in spring it decreased tenfold. Conclusion: There are no clear links between the occurrence of the foehn wind and suicides. The foehn wind could increase the risk of suicide in the Tatra Mountains in the summer and autumn of the analysed period. Further research is needed to explain a possible relationship between foehn winds and suicide as well as to apply the research results in this field in suicide prevention in the mountain regions