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Interstellar gas motions around massive star formation regions in the nearby dwarf galaxy DDO43
Full text linkAreas of massive star formation are strongly influenced by stellar winds and supernovae, therefore, enhanced turbulent flows are expected. We analyse high-quality Karl G. Jansky Very Large Array observations of the neutral hydrogen gas content of DDO43, a relatively nearby irregular dwarf galaxy. The line wings of neutral hydrogen spectral lines, which provide insights into local enhanced velocity dispersion, are investigated together with far-ultraviolet data, tracing emissions from massive star-forming regions. We find very weak correlations with both higher and lower velocity areas
Nanosatellite X-ray lobster eye optics – measurement of optical performance
Full text linkThis paper presents the results of tests of a one-dimensional Schmidt lobster-eye prototype module. The optics benefits from the new technology used for the mechanical part which ensures accurate positioning of individual mirrors, resulting in a sharp image in the focal plane. The prototype is designed for X-ray energy of around 1 keV, but it was tested in the visible part of the spectrum. FWHM is determined. The experimental results agree well with the simulation
The two-point correlation function of the GRBs
Full text linkWe analysed the spatial distribution of 542 GRBs with measured position and spectroscopic redshift up to 31 Aug 2022. Using kernel smoothing, we determined the GRB’s Sky Exposure Function and used it in the generation of random catalogues. The spatial Two-Point Correlation Function for GRBs was determined by partitioning the data based on the origin of the redshift (afterglow or host galaxy). The resulting ξ(r) Two-Point Correlation functions remain below the 3σ noise level, suggesting no significant differences between the Two-Point Correlation functions of the random and real datasets
A study on the effect of two different foaming agents on foam concrete properties
Full text linkNowadays, foam concrete is widely used in construction. However, the structure and properties of foam concrete with a density < 1200 kg/m3 are greatly affected by different foaming agents. In this study, the effects of foaming agents (EABASSOC and AS) on the properties of foam concrete are presented such as compressive strength, flexural strength, shrinkage, water absorption, thermal insulation and microstructure. Research results show that EABASSOC foaming agent has better stability and durability than AS foaming agent; compressive strength of foam concrete using EABASSOC foaming agent is higher from 0.7÷1.1 MPa and water absorption is lower than foam concrete using AS foaming agent from 2.1÷6%. In addition, the pore structure of the foam concrete was tested by electron microscopy (SEM). Foamed concrete using EABASSOC foaming agent showed a narrower pore size distribution in concrete than using AS foaming agent. It can be proved that using EABASSOC foaming agent to produce foam concrete brings many practical meanings in the construction in Vietnam.
Received: 23.03.2024
Received in revised form: 10.04.2025
Accepted: 06.11.202
Empowering IoT: leveraging data sensor communication with LoRAWAN in diverse environments
Full text linkThe Internet of Things (IoT) connects countless devices, such as sensors and actuators, necessitating an efficient long-range communication technology. Low Power Wide Area Network (LPWAN) solutions, such as LoRAWAN, SIGFOX, and NB-IoT, address this demand. LoRAWAN, known for its low power consumption, excels in Line of Sight (LOS) conditions, offering an effective long-range wireless communication. It’s ideal for monitoring open areas. In Non-Line of Sight (NLOS) scenarios, LoRAWAN provides wide coverage and energy efficiency, though the signal quality may slightly decline. This research tests LoRAWAN’s performance for sensor data communication both inside multi-story buildings (up to 8 storeys) and outside. The results show successful data transmission in both scenarios, including up to 2.60 km with a 35 dBi outdoor antenna
Local Mechanical Properties 2024
No full textThe Sixteenth International Conference on Local Mechanical Properties (LMP 2024) was organised by the Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering. It was held in Prague from May 29 to May 31, 2024 in the main building of the Faculty of Nuclear Sciences and Physical Engineering.
The conference alternates venue in Slovakia and the Czech Republic. The previous years were in 2004 - Košice, 2005 – Košice, 2006 – Plzeň-Nečtiny, 2007 – Brno, 2008 – Košice, 2009 – Telč, 2010 – Smolenice, 2011 – Olomouc, 2012 – Levoča, 2013 – Kutná Hora, 2014 – Stará Lesná, 2015 – Liberec, 2017 – Košice, 2019 – Prague, 2022 – Košice.
The LMP 2024 conference brought together 85 participants from 12 countries (Czech Republic, Slovakia, France, Germany, Austria, Poland, Hungary, Switzerland, Bulgaria, United Kingdom, Turkey, India). The programme covered 45 oral presentations in 10 sections and 21 posters. The conference was sponsored by 10 generous partners and MecaNano COST Action CA21121 (European Network for the Mechanics of Matter at the Nano-Scale) whose support is greatly appreciated.
The conference programme consisted of research results and developments in the field of characterization of mechanical properties of various materials at nano- and micro-scales. A wide range of materials was covered, from metals, glass, ceramics, and polymers to biological tissues or structural concrete. The conference was complemented by an introductory workshop and a special session devoted to the members of MecaNano COST Action CA21121.
The proceedings are composed of selected peer reviewed papers. They include papers focused on nanoindentation, in-situ micromechanical testing, finite element modelling and other experimental techniques performed on various materials, films and coatings under ambient as well as severe conditions, including high temperature or irradiation.
The organising committee hopes that the proceedings will provide a valuable overview and state-of-the-art in the field of local mechanical properties. The organising committee would like to thank all participants and sponsors for their attendance and support.
We are looking forward meeting you at LMP 2026 which will be organised by the Institute of Materials Research of SAS in May 2026 in Slovakia.
Chairman:Dr. Jaroslav Čech (Czech Technical University in Prague)
Organising committee:Dr. Jaroslav Čech (Czech Technical University in Prague)Prof. Petr Haušild (Czech Technical University in Prague)Prof. Jiří Němeček (Czech Technical University in Prague)Dr. Karel Tesař (Czech Technical University in Prague)
Scientific board:Dr. Jiří Buršík (CZ)Prof. Vilma Buršíková (CZ)Dr. Megan Cordill (AT)Dr. Jaroslav Čech (CZ)Dr. Radim Čtvrtlík (CZ)Prof. Petr Haušild (CZ)Prof. Šárka Houdková Šimůnková (CZ)Prof. Guillaume Kermouche (FR)Prof. Vincent Keryvin (FR)Dr. Marc Legros (FR)Prof. František Lofaj (SK)Dr. Aleš Materna (CZ)Prof. Jaroslav Menčík (CZ)Prof. Benoit Merle (DE)Prof. Andreas Mortensen (CH)Prof. Radek Mušálek (CZ)Prof. Jiří Němeček (CZ)Prof. Ladislav Pešek (SK)Prof. Michael Swain (AUS)Dr. Pavol Zubko (SK)
Guarantor of the peer review process:Jaroslav Čech
Guarantor of language editing:Jaroslav Čech
Best poster winner:Matej Kubiš with the poster "Nanoindentation analysis of high fluence helium ion irradiated Eurofer 97 and ODS Eurofer steels".
Sponsors and Exhibitors:
Anton Paar
Jeol
Alemnis
MTM Měřicí technika Morava
NenoVision
Keyence
Zeiss
Zwick-Roell
Ametek
Micro Material
Aplicability of Magnesium Phosphate Cement for Bioreceptive Concrete Tiles
Full text linkThe pressing need for innovative green solutions in urban environments is evident. This study explores a novel concept of integrating green areas directly onto structural surfaces as a means to enhance urban infrastructure with real floral life. Specifically, the research focuses on the potential application of a newly developed bioreceptive concrete that promotes the growth of microorganisms on its surface. The concrete properties were carefully optimized to enhance bioreceptivity by altering the mix design and employing a different type of hydraulic binder to meet the conditions necessary for biological growth. This bioreceptive concrete was tested as an additional layer on top of normal OPC concrete which was used to manufacture to the supporting structure. The study primarily examines two key properties of the bioreceptive concrete: pH and porosity.The pressing need for innovative green solutions in urban environments is evident. This study explores a novel concept of integrating green areas directly onto structural surfaces to enhance urban infrastructure with real floral life. Specifically, the research focuses on the application of newly developed bioreceptive concrete, which is engineered to promote the growth of microorganisms, including mosses, lichens, and algae, on its surface. To achieve optimal bioreceptivity, the concrete\u27s properties were carefully modified by changing the mix design and using Magnesium Phosphate Cement instead of traditional Ordinary Portland Cement. This substitution resulted in a significant reduction in pH, creating a more favorable environment for the life of plants and microorganisms. Additionally, an optimal formulation was developed with a suitable grain size distribution to achieve the desired porosity, which is critical for water retention and microbial establishment. This bioreceptive concrete was tested as an additional layer on top of normal OPC concrete which was used to manufacture to the supporting structure. The concrete properties were carefully optimized to enhance bioreceptivity by altering the mix design and employing a different type of hydraulic binder to meet the conditions necessary for biological growth. The study primarily examines two key properties of bioreceptive concrete: pH and porosity
Knowledge and technology transfer in construction engineering: two case studies involving special concrete
Full text linkThis research examines the dynamics of knowledge and technology transfer (KTT) within the construction industry while focusing on innovation in special concrete. The study aims to assess two representative cases in different European target regions, namely Germany and the Czech Republic. The aim is to evaluate the role of the KTT intermediaries employed, the significance of intellectual property during the transfer process, and the linearity of the transfer process. Methodologically, a qualitative case study approach was used, selecting two cases from prominent technical universities. The outcomes were complemented by additional research to unveil the prerequisites of the KTT structure within the selected institutions. Findings include the importance of KTT intermediaries in speeding up the transfer process.The presence of IP was not a determining factor in starting up a business. Lastly, a suggested linearity of the theoretical transfer process was not followed. These case studies serve as a call to action, aiming to explain and promote KTT processes within the construction sector and inspire further research to bridge the gap between theory and practical applications of transfer
Commonly used methods to monitor driver’s drowsiness and fatigue with a focus on the interior camera
Full text linkSome of the main causes of road accidents nowadays are fatigue, drowsiness and driver inattention. In many cases, these accidents are fatal and can cause significant financial loss. Most of these accidents happen between midnight and 6am. One way to reduce the number of accidents caused by these causes is to use an interior camera. This camera can detect fatigue or drowsiness and alert the driver in time, and in the worst case, take over the car and stop safely at the side of the road. The aim of this article is to provide a comprehensive overview of the methods used to detect driver fatigue, drowsiness and inattention. A further objective is then to develop and process a survey that focuses on public awareness and opinions on the integration of interior cameras in vehicles across Europe
Astronomy events at Aschaffenburg University to attract future students
Full text linkIn 2023 the German Federal Ministry of Education and Research and the German organization for science communication “Wissenschaft im Dialog” jointly proclaimed a "Science Year 2023" in Germany with the motto “Our Universe”. One of the numerous events that have been supported thereby has been that of the project "Zirkus UNI-versum", which took place in summer 2023 at Aschaffenburg University of Applied Sciences. This project – and other activities for schools – intend to stimulate the interest of pupils in STEM subjects and to attract future engineering students