TY - JOUR A1 - Klopp, Christoph A1 - Trittel, Torsten A1 - Harth, Kirsten A1 - Stannarius, Ralf T1 - Coalescence of biphasic droplets embedded in free standing smectic A films JF - Soft Matter N2 - We investigate micrometer-sized flat droplets consisting of an isotropic core surrounded by a nematic rim in freely suspended smectic A liquid-crystal films. In contrast to purely isotropic droplets which are characterized by a sharp edge and no long-range interactions, the nematic fringe introduces a continuous film thickness change resulting in long-range mutual attraction of droplets. The coalescence scenario is divided in two phases. The first one consists in the fusion of the nematic regions. The second phase involves the dissolution of a thin nematic film between the two isotropic cores. The latter has many similarities with the rupture of thin liquid films between droplets coalescing in an immiscible viscous liquid. Coalescence of biphasic droplets in free-standing smectic films is controlled in part by the rupture of a thin nematic membrane separating the isotropic droplet cores. Y1 - 2023 UR - https://pubs.rsc.org/en/content/articlelanding/2024/sm/d3sm01549a U6 - https://doi.org/10.1039/d3sm01549a SN - 1744-683X VL - 20 IS - 5 SP - 1036 EP - 1046 PB - Royal Society of Chemistry ER - TY - JOUR A1 - Kuznetsov, Arthur A1 - Frorip, Aleksandr A1 - Sünter, Alar A1 - Kasvand, Nensi A1 - Korsakov, Vadim A1 - Konoplev, Georgii A1 - Stepanova, Oksana A1 - Rusalepp, Linda A1 - Anton, Dea A1 - Püssa, Tõnu A1 - Roasto, Mati A1 - Abramova, Liubov A1 - Kozin, Andrey A1 - Toom, Lauri A1 - Hirsch, Sören A1 - Mukhin, Nikolay ED - mdpi, T1 - Fast Protein and Metabolites (Nucleotides and Nucleosides) Liquid Chromatography Technique and Chemical Sensor for the Assessment of Fish and Meat Freshness JF - Chemosensors N2 - Fast protein and metabolite liquid chromatography (FPLMC) was introduced years ago to enable the easy separation of high-molecular compounds such as proteins from small molecules and the identification of the low-molecular substances. In this paper, the method is applied for the rapid evaluation of freshness and monitoring the aging of animal meat and fish. A novel chromatographic sensor was developed with a deep UV LED-based photometric detection unit (255–265 nm), an original flow cuvette and registration scheme; the processing of a chromatogram with the sensor takes approximately 15 min. Strict isochronism between the elution of ATP metabolites, mainly hypoxanthine (Hx) and inosine monophosphate (IMP), and the time of maturation of meat or fish, was discovered. A new freshness index H* = [Hx]/[IMP] was introduced, which is proportional to the instrumental delay time in the FPMLC chromatograms: the H* index < 0.5 indicates the presence of inosine monophosphate (IMP) and the high quality of the meat or fish. Reasonably strong correlations were revealed between data obtained by FPMLC and total volatile basic nitrogen TVB-N (for fish) or volatile fatty acids VFA (for meat) content. Moreover, putative nucleotide salvage and an increase in the concentration of IMP were observed in fish after heat treatment using the FPMLC sensor and NMR technique. Y1 - 2023 UR - https://www.mdpi.com/2227-9040/11/1/69 U6 - https://doi.org/10.3390/chemosensors11010069 SN - 2227-9040 IS - 1/2023 / Band 11 PB - MDPI ER - TY - JOUR A1 - Chaurasia, Prashtan Kumar A1 - Goecke, Sven-Frithjof A1 - De, Amitava T1 - Real-time monitoring of temperature field, metal transfer and cooling rate during gas metal arc-directed energy deposition JF - Science and Technology of Welding and Joining Y1 - 2022 U6 - https://doi.org/10.1080/13621718.2022.2080447 SN - 13621718 IS - 27 SP - 512 EP - 521 PB - Taylor & Francis ER - TY - JOUR A1 - Tumarkin, Andrey A1 - Tyurnina, Natalya A1 - Mukhin, Nikolay A1 - Tyurnina, Zoya A1 - Sinelshchikova, Olga A1 - Gagarin, Alexander A1 - Sapego, Eugeny A1 - Kretser, Yriy T1 - Glass-ceramic ferroelectric composite material BaTiO3/KFeSi for microwave applications JF - Composite Structures N2 - Glass-ceramic composites consisting of potassium-iron-silicate glass and barium titanate mixed in various proportions were successfully synthesized by low-temperature sintering. The crystal structure of the obtained composite samples, the porosity and the microhardness were studied by the X-ray diffraction, the electron microscopy, the weight method, and the Vickers method. Electrical characteristics (dielectric permittivity, tunability and losses) of as-prepared and annealed in oxygen medium samples were investigated at microwaves. According to structural analysis, the synthesized samples are a mixture of KFeSi glass, ferroelectric BaTiO3, and dielectric barium polytitanates; the ratio of the latter determines the electrical properties of the composites. Depending on the content of barium titanate, the studied composite samples show a permittivity from 50 to 270 with a dielectric loss level of 0,1–0,02 in frequency range from 3 to 10 GHz. Annealing of composite samples in an oxygen-containing environment leads to an increase in their dielectric permittivity and tunability by 10–25% and a twofold decrease in dielectric loss. Y1 - 2022 UR - https://linkinghub.elsevier.com/retrieve/pii/S0263822321014161 SN - 0263-8223 VL - 281 SP - 1 EP - 10 PB - Elsevier ER - TY - JOUR A1 - Fachet, Melanie A1 - Witte, Carina A1 - Flassig, Robert J. A1 - Rihko-Struckmann, Liisa K. A1 - McKie-Krisberg, Zaid A1 - Polle, Jürgen E. W. A1 - Sundmacher, Kai T1 - Reconstruction and analysis of a carbon-core metabolic network for Dunaliella salina JF - BMC Bioinformatics KW - Metabolic network reconstruction KW - Central carbon metabolism KW - Flux balance analysis KW - Dunaliella salina Y1 - 2020 U6 - https://doi.org/10.1186/s12859-019-3325-0 VL - 21 IS - 1 PB - BioMed Central ER - TY - JOUR A1 - Giesler, Jasper A1 - Pesch, Georg R. A1 - Weirauch, Laura A1 - Schmidt, Marc-Peter A1 - Thöming, Jorg A1 - Baune, Michae T1 - Polarizability-Dependent Sorting of Microparticles Using Continuous-Flow Dielectrophoretic Chromatography with a Frequency Modulation Method JF - Micromachines Y1 - 2020 U6 - https://doi.org/10.3390/mi11010038 VL - 11 IS - 1 SP - 38 PB - MDPI ER - TY - JOUR A1 - Vollmer, Michael A1 - Möllmann, Klaus-Peter T1 - Unsichtbares sichtbar gemacht: Infrarotkameras für Smartphones JF - Physik in unserer Zeit KW - Infrarotkamera KW - Smartphone KW - Temperaturmessung KW - räumliche Auflösung KW - qualitative Analyse KW - quantitative Analyse Y1 - 2020 U6 - https://doi.org/https://doi.org/10.1002/piuz.201901551 VL - 51 IS - 1 SP - 29 EP - 35 PB - Wiley-VCH ER - TY - JOUR A1 - Möllmann, Klaus-Peter A1 - Regehly, Martin A1 - Vollmer, Michael T1 - Spectroscopy and microscopy analysis of semiconductor lasers in student laboratories JF - European Journal of Physics Y1 - 2020 U6 - https://doi.org/10.1088/1361-6404/ab5075 VL - 41 IS - 2 SP - 025302 PB - Institute of Physics Publishing (IOP); European Physical Society ER - TY - JOUR A1 - Vollmer, Michael A1 - Möllmann, Klaus-Peter T1 - Wenn Licht die Biege macht JF - Physik in unserer Zeit Y1 - 2020 U6 - https://doi.org/https://doi.org/10.1002/piuz.202001569 VL - 51 IS - 1 SP - 46 EP - 47 PB - Wiley-VCH ER - TY - JOUR A1 - Lübcke, Andrea A1 - Braenzel, Julia A1 - Dehlinger, Aurelie A1 - Schnürer, Matthias A1 - Stiel, Holger A1 - Guttmann, Peter A1 - Rehbein, Stefan A1 - Schneider, Gerd A1 - Werner, Stephan A1 - Kemmler, Roman A1 - Ritter, Sebastian A1 - Raugust, Marc A1 - Wende, Torsten A1 - Behrendt, Marcel A1 - Regehly, Martin T1 - Soft X-ray nanoscale imaging using a sub-pixel resolution charge coupled device (CCD) camera JF - Review of Scientific Instruments Y1 - 2019 U6 - https://doi.org/10.1063/1.5053593 VL - 90 IS - 4 PB - American Institute of Physics ER - TY - JOUR A1 - Flassig, Robert J. A1 - Mangold, Michael A1 - Wölfer, Christian T1 - Towards Design of Self‐Organizing Biomimetic Systems JF - Advanced Biosystems KW - bottom-up KW - synthetic biology KW - functional biomodules KW - model-based bioengineering KW - protocell KW - whole cell model Y1 - 2019 U6 - https://doi.org//10.1002/adbi.201800320 SN - 2366-7478 VL - 3 IS - 6 SP - 1800320 PB - Wiley Vch ER - TY - JOUR A1 - Goecke, Sven-Frithjof A1 - Makwana, Pinaac A1 - Shome, Mahadev A1 - De, Amitava T1 - Probing joint strength and distortion in gas metal arc lap joining of aluminum and steel sheets JF - Welding in the World Y1 - 2019 U6 - https://doi.org/10.1007/s40194-018-0653-z VL - 63 IS - 2 SP - 229 EP - 236 PB - Springer ER - TY - JOUR A1 - Vollmer, Michael A1 - Shaw, Joseph A. A1 - Nugent, Paul A1 - Harris, Wilson T1 - Heiße Quellen im Wärmebild. Yellowstone‐Park im Infraroten JF - Physik in unserer Zeit Y1 - 2019 U6 - https://doi.org/10.1002/piuz.201901539 VL - 50 IS - 5 SP - 244 EP - 250 PB - Wiley-VCH ER - TY - JOUR A1 - Makwana, Pinaac A1 - Goecke, Sven-Frithjof A1 - De, Amitava T1 - Real-time heat input monitoring towards robust GMA brazing JF - Science and Technology of Welding & Joining Y1 - 2019 U6 - https://doi.org/10.1080/13621718.2018.1470290 VL - 24 IS - 1 SP - 1 EP - 11 PB - Taylor & Francis ER - TY - JOUR A1 - Vollmer, Michael A1 - Möllmann, Klaus-Peter T1 - Manche mögen‘s kochend heiß JF - Physik in unserer Zeit Y1 - 2019 U6 - https://doi.org/10.1002/piuz.201901533 VL - 50 IS - 1 SP - 46 EP - 47 PB - Wiley-VCH ER - TY - JOUR A1 - Vollmer, Michael A1 - Möllmann, Klaus-Peter T1 - Alles kalter Kaffee? Rasante Physik JF - Physik in unserer Zeit Y1 - 2019 U6 - https://doi.org/10.1002/piuz.201901553 VL - 50 IS - 5 SP - 252 EP - 253 PB - Wiley-VCH ER - TY - JOUR A1 - Vollmer, Michael A1 - Möllmann, Klaus-Peter T1 - Das langsame Verdunsten von Wasser JF - Physik in unserer Zeit Y1 - 2019 U6 - https://doi.org/10.1002/piuz.201901541 VL - 50 IS - 2 SP - 97 EP - 98 PB - Wiley-VCH ER - TY - JOUR A1 - Mikhailov, Ivan Igorevich A1 - Lamkin, I. A. A1 - Degterev, Aleksandr A1 - Degtereva, Mariya A1 - Pavlova, Marina A1 - Kurachkina, Marharyta A1 - Tarasov, S. A. A1 - Kuzmina, Ulyana T1 - Фоточувствительные структуры с каскадными концентраторами излучения на основе коллоидных квантовых точек халькогенидов металлов JF - Journal of the Russian Universities Radioelectronics N2 - The problem of increasing the efficiency of existing photodetectors and creating their new types attracts much research attention. Among new photodetector types are photosensitive structures based on cascade concentrators, whose operational principle involves the absorption of optical radiation followed by its reemission at a longer wavelength and radiation concentration onto a highly efficient small-area photodetector. The absorption and re-emission spectra of each cascade layer depend on the characteristics of the material used. Сolloidal quantum dots are among the most promising materials for cascade layers due to their manufacturing technology, which provides for accurate control over the photoluminescence maximum position. It seems highly relevant to develop and to study photosensitive structures with cascade concentrators of various shapes based on CdS, CdSe/ZnS, and PbS colloidal quantum dots. Aim . To develop photosensitive structures with a wide-range sensitivity spectrum based on concentrators containing arrays of metal chalcogenide CQDs and to study their characteristics. Materials and methods . Cascade photosensitive structures were manufactured based on layers made of polymethyl methacrylate and layers of colloidal quantum dots embedded in a polystyrene matrix. Results . Three-layer concentrators were manufactured with different colloidal quantum dots in each concentrator layers. A 22 % increase in the output power was observed for a three-layer cascade structure based on different cascade layer materials compared to a similar structure using a single layer concentrator. Conclusion . The conducted studies showed an increase in the efficiency of photosensitive structures with a cascade concentrator based on colloidal quantum dots of various types (CdS, CdSe/ZnS, and PbS) in the cascade layers. T2 - Photo-sensitive Structures with Cascade Radiation Concentrators Based on Colloidal Quantum Dots of Metal Chalcogenides Y1 - 2023 U6 - https://doi.org/10.32603/1993-8985-2023-26-2-78-88 SN - 2658-4794 VL - 26 IS - 2 SP - 78 EP - 88 PB - Saint Petersburg Electrotechnical University ER - TY - JOUR A1 - Wang, Jing A1 - Harth, Kirsten A1 - Puzyrev, Dmitry A1 - Stannarius, Ralf T1 - The effect of obstacles near a silo outlet on the discharge of soft spheres JF - New Journal of Physics KW - fluid dynamics Y1 - 2022 U6 - https://doi.org/10.1088/1367-2630/ac8bea VL - 24 PB - IOP ER - TY - JOUR A1 - Regehly, Martin A1 - Hecht, Stefan T1 - Auf dem Weg zum Replikator BT - volumetrischer 3D-Druck JF - Physik in unserer Zeit KW - Xolographie KW - 3D-Druck KW - Additive Fertigung KW - volumetrisch KW - Photoschalter KW - Lichtschnitt Y1 - 2022 U6 - https://doi.org/10.1002/piuz.202201637 SN - 1521-3943 SN - 1521-3943 (eISSN) VL - 53 IS - 3 SP - 125 EP - 131 PB - Wiley-VCH GmbH ER - TY - CHAP A1 - Knobloch, Florian T1 - Impact of dimming and aperture on the optical wireless performance in public street lighting T2 - 14th International Conference on Telecommunications (ConTEL), Zagreb, 2017 KW - free-space optical communication KW - lighting Y1 - 2017 U6 - https://doi.org/10.23919/ConTEL.2017.8000035 SP - 27 EP - 34 PB - IEEE ER - TY - JOUR A1 - Kraska, Martin T1 - Meclib: Dynamic and Interactive Figures in STACK Questions Made Easy JF - International Journal of Emerging Technologies in Learning (iJET) N2 - Making and interpretation of drawings and schematics is an important skill to be developed in engineering education. The question type STACK in the Moodle learning management system combined with the interactive graphics library JSXGraph has a great potential for implementation of e-learning resources addressing these skills in formative and summative settings. The authoring process of such materials is complex due to multiple markup and programming languages like HTML, LaTeX, Maxima and JavaScript (JS) being involved. The Meclib concept mitigates this complexity and allows for efficient bulk production of material with consistent appearance and user experience. The core of Meclib is a set of pre-defined JSXGraph-based objects with an interface to Maxima, such that no problem specific JS code is required at all. The present paper outlines the basic ideas of the implementation and demonstrates the approach for some typical examples of different complexity. The focus is on applications in engineering mechanics, starting from static illustrations up to an editor for free body diagrams, with rich adaptive formative feedback. Y1 - 2022 UR - https://online-journals.org/index.php/i-jet/article/view/36501 U6 - https://doi.org/10.3991/ijet.v17i23.36501 SN - 1863-0383 VL - 17 IS - 23 SP - 15 EP - 27 PB - International Association of Online Engineering ER - TY - JOUR A1 - Kuznetsov, Artur A1 - Frorip, Aleksandr A1 - Sünter, Alar A1 - Korsakov, Vadim A1 - Konoplev, Georgii A1 - Stepanova, Oksana A1 - Roschina, Natalia A1 - Ovsyannikov, Nikolay A1 - Lialin, Daniil A1 - Gerasimchuk, Roman A1 - Dmitriev, Alexander A1 - Mukhin, Nikolay A1 - Hirsch, Sören T1 - Optical Chemical Sensor Based on Fast-Protein Liquid Chromatography for Regular Peritoneal Protein Loss Assessment in End-Stage Renal Disease Patients on Continuous Ambulatory Peritoneal Dialysis JF - Chemosensors KW - optical chemical sensor KW - fast-protein liquid chromatography KW - UV LED KW - end-stage renal disease KW - peritoneal dialysis KW - peritoneal protein loss KW - albumin KW - point-of-care diagnostic devices Y1 - 2022 U6 - https://doi.org/10.3390/chemosensors10060232 VL - 10 IS - 6 PB - MDPI ER - TY - JOUR A1 - Trittel, Torsten A1 - Klopp, Christoph A1 - Harth, Kirsten A1 - Stannarius, Ralf T1 - Stability and Rupture of Liquid Crystal Bridges under Microgravity JF - Crystals KW - smectic liquid-crystals KW - Rayleigh-Plateau instability KW - TEXUS suborbital rocket KW - microgravity Y1 - 2022 U6 - https://doi.org/https://doi.org/10.3390/cryst12081092 VL - 12 IS - 8 PB - MDPI ER - TY - JOUR A1 - Vollmer, Michael A1 - Shaw, Joseph A. T1 - Seeing better in nature: contrast enhancement by near infrared imaging JF - European Journal of Physics Y1 - 2022 U6 - https://doi.org/10.1088/1361-6404/ac578d VL - 43 IS - 3 PB - Institute of Physics Publishing ER - TY - JOUR A1 - Konoplev, Georgii A1 - Agafonova, Darina A1 - Bakhchova, Liubov A1 - Mukhin, Nikolay A1 - Kurachkina, Marharyta A1 - Schmidt, Marc-Peter A1 - Verlov, Nikolay A1 - Sidorov, Alexander A1 - Oseev, Aleksandr A1 - Stepanova, Oksana A1 - Kozyrev, Andrey A1 - Dmitriev, Alexander A1 - Hirsch, Sören T1 - Label-Free Physical Techniques and Methodologies for Proteins Detection in Microfluidic Biosensor Structures JF - Biomedicines KW - label-free biosensor KW - microfluidics KW - proteins detection KW - optical biosensors KW - impedance spectroscopy KW - plasmon resonance KW - point-of-care KW - diagnostic devices Y1 - 2022 U6 - https://doi.org/10.3390/biomedicines10020207 SN - 2227-9059 VL - 10 IS - 2 SP - 207 PB - MDPI ER - TY - JOUR A1 - Kombe, Emmanuel Yeri A1 - Langat, Nickson A1 - Njogu, Paul A1 - Malessa, Reiner A1 - Weber, Christian-Toralf A1 - Njoka, Francis A1 - Krause, Ulrich T1 - Numerical investigation of sugarcane bagasse gasification using Aspen Plus and response surface methodology JF - Energy Conversion and Management KW - Biomass gasification KW - Aspen Plus KW - Optimization KW - Gibbs free energy minimization KW - Response surface methodology Y1 - 2022 U6 - https://doi.org/10.1016/j.enconman.2021.115198 SN - 0196-8904 VL - 254 PB - Elsevier ER - TY - JOUR A1 - Missaoui, Amine A1 - Harth, Kirsten A1 - Trittel, Torsten A1 - Klopp, Christoph A1 - Stannarius, Ralf A1 - Lacaze, Emanuelle T1 - Shape instabilities of islands in smectic films under lateral compression JF - Soft Matter Y1 - 2022 U6 - https://doi.org/10.1039/D2SM00144F SN - 1744-6848 VL - 16 SP - 3193 EP - 3205 PB - Royal Society of Chemistry ER - TY - JOUR A1 - Mukhin, Nikolay A1 - Konoplev, Georgii A1 - Oseev, Aleksandr A1 - Schmidt, Marc-Peter A1 - Stepanova, Oksana A1 - Kozyrev, Andrey A1 - Dmitriev, Alexander A1 - Hirsch, Soeren T1 - Label-Free Protein Detection by Micro-Acoustic Biosensor Coupled with Electrical Field Sorting. Theoretical Study in Urine Models JF - Sensors KW - acoustic liquid sensor KW - shear bulk acoustic resonator KW - biosensor KW - structured sensor interface KW - electrical field manipulation KW - urine proteins characterisation Y1 - 2021 U6 - https://doi.org/10.3390/s21072555 VL - 21 IS - 7 SP - 2555 PB - MDPI ER - TY - JOUR A1 - Kramann, Guido T1 - Composing by Laypeople: A Broader Perspective Provided by Arithmetic Operation Grammar JF - Computer Music Journal Y1 - 2021 U6 - https://doi.org/10.1162/comj_a_00550 VL - 44 IS - 1 SP - 17 EP - 34 PB - MIT Press ER - TY - JOUR A1 - Rudenko, Maryia A1 - Gaponenko, Nikolai A1 - Litvinov, Vladimir A1 - Ermachikhin, Alexander A1 - Chubenko, Eugene A1 - Borisenko, Victor A1 - Mukhin, Nikolay A1 - Radyush, Yuriy A1 - Tumarkin, Andrey A1 - Gagarin, Alexander T1 - Structural Dependent Eu3+ Luminescence, Photoelectric and Hysteresis Effects in Porous Strontium Titanate JF - Materials KW - europium luminescence KW - poporous film KW - strontium titanate KW - resistive switching hysteresis KW - photocurrent Y1 - 2020 U6 - https://doi.org/10.3390/ma13245767 VL - 13 IS - 24 PB - MDPI ER - TY - JOUR A1 - Tumarkin, Andrey A1 - Tyurnina, Natalya A1 - Tyurnina, Zoya A1 - Mukhin, Nikolay A1 - Sinelshchikova, Olga A1 - Gagarin, Alexander A1 - Sviridov, Sergey A1 - Drozdovsky, Andrey A1 - Sapego, Eugeny A1 - Mylnikov, Ivan T1 - Barium-Strontium Titanate/Porous Glass Structures for Microwave Applications JF - Materials KW - glass-ceramic structures KW - filling of porous material KW - microwave KW - barium-strontium titanate Y1 - 2020 U6 - https://doi.org/10.3390/ma13245639 VL - 13 IS - 24 PB - MDPI ER - TY - JOUR A1 - Regehly, Martin A1 - Garmshausen, Yves A1 - Reuter, Marcus A1 - König, Niklas F. A1 - Israel, Eric A1 - Kelly, Damian P. A1 - Chou, Chun-Yu A1 - Koch, Klaas A1 - Asfari, Baraa A1 - Hecht, Stefan T1 - Xolography for linear volumetric 3D printing JF - Nature KW - Design, synthesis and processing KW - Materials chemistry KW - Photochemistry Y1 - 2020 U6 - https://doi.org/10.1038/s41586-020-3029-7 VL - 588 SP - 620 EP - 624 PB - Nature Research ER - TY - JOUR A1 - Vollmer, Michael T1 - Cherenkov radiation: why is it perceived as blue? JF - European Journal of Physics KW - Cherenkov radiation KW - blue color KW - water transmission spectra Y1 - 2020 U6 - https://doi.org/10.1088/1361-6404/abaf42 VL - 41 IS - 6 PB - Institute of Physics Publishing ER - TY - JOUR A1 - Vollmer, Michael T1 - Gefrierende Gewässer JF - Physik in unserer Zeit KW - Gefrieren von Seen KW - Eiswachstumsmodell KW - Konvektion KW - Strahlung KW - Stefan-Boltzmann-Gesetz KW - Wärmeleitfähigkeit KW - optische Eisdickenmessung Y1 - 2021 U6 - https://doi.org/10.1002/piuz.202001589 VL - 52 IS - 1 SP - 19 EP - 25 PB - Wiley-Blackwell ER - TY - JOUR A1 - Vollmer, Michael A1 - Möllmann, Klaus-Peter T1 - Fata Morgana im Wasserbecken JF - Physik in unserer Zeit KW - Fata Morgana KW - Luftspiegelung Y1 - 2020 U6 - https://doi.org/10.1002/piuz.202001575 VL - 51 IS - 2 SP - 98 EP - 99 PB - Wiley-Blackwell ER - TY - JOUR A1 - Vollmer, Michael T1 - Below the horizon-the physics of extreme visual ranges JF - Applied Optics Y1 - 2020 U6 - https://doi.org/10.1364/AO.390654 VL - 59 IS - 21 SP - F11 EP - F19 PB - Optica Publishing Group ER - TY - JOUR A1 - Ochkov, V. F. A1 - Kraska, Martin A1 - Lukatsky, A. M. T1 - Математический Анализ Трамвайных Путей T1 - Mathematical Analysis of Tram Tracks JF - Физика в школе N2 - В статье рассказано, как необходимо проектировать повороты железной дороги, чтобы не было сильных боковых толчков. используются методы математического анализа для решения задачи. пред- ложена новая переходная кривая N2 - The article explains how to design railroad turns to minimize lateral jolts. mathematical analysis methods are used to solve the problem. a new transi- tion curve is proposed. Y1 - 2024 UR - http://twt.mpei.ac.ru/OCHKOV/Physic-in-School-1-2024.pdf U6 - https://doi.org/10.47639/0130-5522_2024_1_32 SP - 32 EP - 45 ER - TY - JOUR A1 - Mukhin, Nikolay A1 - Sokolova, Irina A1 - Chigirev, Dmitry A1 - Rudaja, Lyudmila A1 - Lebedeva, Galina A1 - Kastro, Rene A1 - Bol’shakov, Maxim A1 - Schmidt, Marc-Peter A1 - Hirsch, Sören T1 - Composite Ferroelectric Coatings Based on a Heat-Resistant Polybenzoxazole Polymer Matrix JF - Coatings KW - lead zirconate titanate KW - poly(o-hydroxy amide) KW - 4,4-(hexafluoroisopropylidene) dianiline KW - 5,5-methylene bis(2-aminophenol) KW - poly(o-hydroxyamide) KW - composite ferroelectric coatings KW - thermal stability of dielectric properties Y1 - 2020 U6 - https://doi.org/10.3390/coatings10030286 VL - 10 IS - 3 SP - 286 PB - Vincentz ER - TY - JOUR A1 - Kutia, Mykhailo A1 - Mukhin, Nikolay A1 - Petrova, Hanna A1 - Oseev, Aleksandr A1 - Bakhchova, Liubov A1 - Schmidt, Marc-Peter A1 - Aman, Alexander A1 - Palis, Stefan A1 - Tarasov, Sergey A1 - Hirsch, Soeren T1 - Sensor for the evaluation of dielectric properties of sulfur-containing heteroatomic hydrocarbon compounds in petroleum based liquids at a microfluidic scale JF - AIP Advances KW - Microfluidics KW - Chemical compounds KW - Petroleum KW - Dielectric spectroscopy KW - Microfluidic devices KW - Gasoline KW - Dielectric properties Y1 - 2020 U6 - https://doi.org/10.1063/1.5141482 VL - 10 IS - 2 SP - 025006 PB - American Institute of Physics ER - TY - JOUR A1 - Arroyo, Hector Linares A1 - Abascal, Angela A1 - Degen, Tobias A1 - Aubé, Martin A1 - Espey, Brian R. A1 - Gyuk, Geza A1 - Hölker, Franz A1 - Jechow, Andreas A1 - Kuffer, Monika A1 - Sánchez de Miguel, Alejandro A1 - Simoneau, Alexandre A1 - Walczak, Ken A1 - Kyba, Christopher C. M. T1 - Monitoring, trends and impacts of light pollution JF - Nature Reviews Earth & Environment N2 - Light pollution has increased globally, with 80% of the total population now living under light-polluted skies. In this Review, we elucidate the scope and importance of light pollution and discuss techniques to monitor it. In urban areas, light emissions from sources such as street lights lead to a zenith radiance 40 times larger than that of an unpolluted night sky. Non-urban areas account for over 50% of the total night-time light observed by satellites, with contributions from sources such as transportation networks and resource extraction. Artificial light can disturb the migratory and reproductive behaviours of animals even at the low illuminances from diffuse skyglow. Additionally, lighting (indoor and outdoor) accounts for 20% of global electricity consumption and 6% of CO2 emissions, leading to indirect environmental impacts and a financial cost. However, existing monitoring techniques can only perform a limited number of measurements throughout the night and lack spectral and spatial resolution. Therefore, satellites with improved spectral and spatial resolution are needed to enable time series analysis of light pollution trends throughout the night. Y1 - 2024 U6 - https://doi.org/10.1038/s43017-024-00555-9 SP - 1 EP - 14 PB - Springer Nature ER - TY - JOUR A1 - Vega, Catherine Perez A1 - Hölker, Franz A1 - Zielinska-Dabkowska, Karolina M A1 - Jechow, Andreas T1 - Polarised light pollution on river water surfaces caused by artificial light at night from illuminated bridges and surroundings JF - Journal of Limnology N2 - Artificial light at night originating from bridge illumination can cause polarised light pollution when it is reflected at water body surfaces. This alters the optical conditions of a river at night and potentially interferes with natural polarisation signals from, for example, moonlight. Therefore, this type of light pollution could detrimentally change the behaviour of organisms sensitive to polarised light, a navigational cue and signal known to be used e.g. by flying water-seeking insects to detect suitable aquatic habitats to reproduce and lay eggs. So far, polarised light pollution from artificial light at night is understudied. Here, we quantify polarised light pollution at the water’s surface near seven illuminated bridges crossing the river Spree in Berlin. Our measurements show for the first time, that nocturnal bridge illumination induces polarised light pollution towards potential flying paths of polarotactic aquatic insects. On average, around 9% of the water surfaces at the investigated bridges were highly polluted by polarised light, with values ranging between 3 and 12 % for each bridge. Thus, polarised light pollution from artificial light at night is an emergent pollutant for aquatic systems. Future work on this topic should include more comprehensive measurements, further ecological studies on its impacts and the development of sustainable lighting solutions that can contribute to the protection of riverine nightscapes. Y1 - 2024 U6 - https://doi.org/10.4081/jlimnol.2024.2173 VL - 83 SP - 1 EP - 13 PB - PAGEPress ER - TY - JOUR A1 - Jechow, Andreas T1 - Let there be Skyglow - light pollution from a large outdoor music festival (Lollapalooza Berlin 2016) JF - Scientific Reports N2 - Live music is often linked to elaborate light shows, particularly at large outdoor music festivals. However, artificial light at night is one form of environmental pollution, light pollution, and because outdoor festivals emit a substantial amount of artificial light into the environment, they are a potential source of light pollution. So far, no studies that quantified the impact of such festivals on urban light pollution and skyglow exist. Here, the light pollution produced by a major rock festival (Lollapalooza Berlin 2016 with 70,000 visitors per day in an urban park) was investigated with ground-based radiometry and night-time light data. A small night-sky radiometer installed near the main stages and a calibrated digital camera from a nearby observation spot inside of the park were used to quantify changes in night sky brightness and direct light emissions within the park. The impact of the music festival on the urban skyglow was indeed measurable. Zenith luminance increased locally by up to a factor of 8 and illuminance increased by about 50% at the observation spot within the park. The radiance detected by night-time satellite was also increased during the festival. This is the first time, that light pollution from such a major rock music event was quantified. Y1 - 2024 U6 - https://doi.org/10.1038/s41598-024-62448-7 VL - 14 SP - 1 EP - 10 PB - Springer Nature ER - TY - JOUR A1 - Klopp, Christoph A1 - Trittel, Torsten A1 - Stannarius, Ralf T1 - Coarsening of Quasi Two-Dimensional Emulsions Formed by Islands in Free-Standing Smectic Films JF - CHEMPHYSCHEM N2 - We study the coarsening behavior of assemblies of islands on smectic A freely suspended films in ISS microgravity experiments. The islands can be regarded as liquid inclusions in a two-dimensional fluid in analogy to liquid droplets of the discontinuous phase of an emulsion. The coarsening is effectuated by two processes, predominantly by island coalescence, but to some extend also by Ostwald ripening, whereby large islands grow at the expense of surrounding smaller ones. A peculiarity of this system is that the continuous and the discontinuous phases consist of the same material. We determine the dynamics, analyze the self-similar aging of the island size distribution and discuss characteristic exponents of the mean island growth. Smectic islands on a thin freely suspended smectic film form a quasi two-dimensional emulsion, without a liquid subphase. We describe the coarsening dynamics that involves island coalescence and Ostwald ripening. Y1 - 2024 U6 - https://doi.org/10.1002/cphc.202400166 SN - 1439-4235 SP - 1 EP - 13 PB - Wiley ER - TY - GEN A1 - Uhl, Roland T1 - Mit einem modifizierten Sieb des Eratosthenes erzeugte Zahlenfolgen N2 - Das Sieb des Eratosthenes wird mit einer größeren Anfangszahl als der 2 durchgeführt, sodass nicht nur Primzahlen übrig bleiben. Von der sich ergebenden Folge wird die größte zusammengesetzte Zahl bestimmt. Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-18701 ER - TY - JOUR A1 - Koldeweij, Robin B. J. A1 - Kant, Pallav A1 - Harth, Kirsten A1 - Ruiter, Rielle de A1 - Gelderblom, Hanneke A1 - Snoeijer, Jacco H. A1 - Lohse, Detlef A1 - Limbeek, Michiel A. J. van T1 - Initial solidification dynamics of spreading droplets JF - Physical Review Fluids N2 - When a droplet is brought in contact with an undercooled surface, it wets the substrate and solidifies at the same time. The interplay between the phase transition effects and the contact-line motion, leading to its arrest, remains poorly understood. Here we reveal the early solidification patterns and dynamics of spreading hexadecane droplets. Total internal reflection imaging is employed to temporally and spatially resolve the early solidification behavior. With this, we determine the conditions leading to the contact-line arrest. We quantify the overall nucleation behavior, i.e., the nucleation rate and the crystal growth speed and show its sensitivity to the applied undercooling of the substrate. We also show that for strong enough undercooling it is the rapid growth of the crystals which determines the eventual arrest of the spreading contact line. By combining the Johnson-Mehl-Avrami-Kolmogorov nucleation theory and scaling relations for the spreading, we calculate the temporal evolution of the solid area fraction, which is in good agreement with our observations. Y1 - 2021 UR - https://link.aps.org/doi/10.1103/PhysRevFluids.6.L121601 U6 - https://doi.org/10.1103/PhysRevFluids.6.L121601 SN - 2469-990X N1 - Band: 6 IS - 12 PB - American Physical Society ER - TY - JOUR A1 - Dietenberger, Manuel A1 - Jechow, Andreas A1 - Kalinkat, Gregor A1 - Schroer, Sibylle A1 - Saathoff, Birte A1 - Hölker, Franz T1 - Reducing the fatal attraction of nocturnal insects using tailored and shielded road lights JF - communications biology N2 - The attraction of insects to artificial light is a global environmental problem with far-reaching implications for ecosystems. Since light pollution is rarely integrated into conservation approaches, effective mitigation strategies towards environmentally friendly lighting that drastically reduce insect attraction are urgently needed. Here, we tested novel luminaires in two experiments (i) at a controlled experimental field site and (ii) on streets within three municipalities. The luminaires are individually tailored to only emit light onto the target area and to reduce spill light. In addition, a customized shielding renders the light source nearly invisible beyond the lit area. We show that these novel luminaires significantly reduce the attraction effect on flying insects compared to different conventional luminaires with the same illuminance on the ground. This underlines the huge potential of spatially optimized lighting to help to bend the curve of global insect decline without compromising human safety aspects. A customized light distribution should therefore be part of sustainable future lighting concepts, most relevant in the vicinity of protected areas. Y1 - 2024 U6 - https://doi.org/10.1038/s42003-024-06304-4 VL - 7 SP - 1 EP - 12 ER - TY - CHAP A1 - Kraska, Martin T1 - SMath + Maxima - Powerful Tool for Engineering Calculations T2 - 2024 7th International Conference on Information Technologies in Engineering Education (Inforino), Moscow, Russian Federation N2 - SMath Studio is mathematical notebook software similar to Mathcad. Its outstanding and intuitive support for scientific units makes it an invaluable asset in higher engineering education. SMath Studio has been used for more than ten years in various courses at Brandenburg University of Applied Sciences, Germany (Technische Hochschule Brandenburg, THB). To enhance the usability of the software, substantial contributions have been made. One of them is the Maxima plugin for access to the free and open-source computer algebra system Maxima. This plugin combines the flexible notebook format of SMath Studio with powerful symbolic functions like integrals and solvers for algebraic and differential equations. Additionally, the plugin adds interactive 3D graphics to SMath. The paper discusses the basic design, features, and limitations, and showcases some applications. Y1 - 2024 SN - 979-8-3503-7136-9 U6 - https://doi.org/10.1109/Inforino60363.2024.10551993 SP - 1 EP - 5 PB - IEEE ER - TY - JOUR A1 - Das, Atanu A1 - Goecke, Sven-Frithjof A1 - De, Amitava T1 - Joining of aluminium alloy and galvanized steel sheets multimaterial assembly using a gas metal arc based process JF - Tecnologia em Matalurgia, Materiais e Mineração Y1 - 2021 U6 - https://doi.org/10.4322/2176-1523.20212464 SN - 2176-1515 (PRINT) 2176-1523 (ONLINE) N1 - Band: 18 PB - ABM - Associação Brasileira de Metalurgia, Materiais e Mineração ER - TY - CHAP A1 - Oertel, Christian T1 - Virtual Tires: Requirements, Fields of Application and Ways of Implementation T2 - Konferenz: 40th Annual Meeting and Conference on Tire Science & Technology: Conference Theme: The Virtual Tire, online, 2021 Y1 - 2021 SP - 1 EP - 18 PB - Tire Society CY - Online ER -