TY - CHAP
A1 - Goecke, Sven-Frithjof
A1 - Seefeld, T.
A1 - Tyralla, Dieter
A1 - Krug, A.
T1 - Monitoring and Control of the Heat Input in MAG-Laser-Hybrid Welding of High Strength Steel in Telescopic Crane Booms
T2 - Konferenz: IEEE International Conference on Automation Science and Engineering (CASE), 2019/ Titel: 2019 IEEE 15th International Conference on Automation Science and Engineering (CASE): August 22-26, 2019, Vancouver, BC, Canada
Y1 - 2019
SN - 978-1-72810-355-6
U6 - https://doi.org/10.1109/COASE.2019.8843219
PB - IEEE
CY - Piscataway, New Jersey
ER -
TY - JOUR
A1 - Vollmer, Michael
T1 - The freezing of lakes in winter
JF - European Journal of Physics
N2 - Freezing of lakes is described using a simplified one-dimensional model, which gives ice thickness, ice growth rates, and ice surface temperature as a function of time. Model data for a specific lake with known meteorological conditions are compared to estimated ice thickness using a simple optical method. Finally, more advanced potential students projects are briefly discussed and results of a numerical solution are compared to the simplified model.
Y1 - 2019
UR - https://iopscience.iop.org/article/10.1088/1361-6404/ab07f8
U6 - https://doi.org/10.1088/1361-6404/ab07f8
SN - 1367-2630
IS - Ausgabe: 3/ Band: 40
PB - IOP Publishing
ER -
TY - JOUR
A1 - Vollmer, Michael
A1 - Mustard, Alexander
T1 - Blue - the color of (pure) water
JF - Physics Education
N2 - Water can exhibit many different colors due to a variety of physical properties. Here, we focus on some observable colors within very pure freshwater. We only treat the absorption of light due to electronic and ro-vibrational excitations and scattering due to refractive index fluctuations of the water and the respective consequences for the appearance of colors.
Y1 - 2019
UR - https://iopscience.iop.org/article/10.1088/1361-6552/ab130a
U6 - https://doi.org/10.1088/1361-6552/ab130a
SN - 0031-9120 (print) 1361-6552 (online)
IS - Ausgabe: 4/ Band: 54
PB - IOP Publishing
ER -
TY - CHAP
A1 - Schmidt, Marc-Peter
A1 - Oseev, Aleksandr
A1 - Engel, C.
A1 - Brose, Andreas
A1 - Aman, Alexander
A1 - Hirsch, Sören
T1 - A Novel Design and Fabrication of Multichannel Microfluidic Impedance Spectroscopy Sensor for Intensive Electromagnetic Environment Application
T2 - Konferenz: The 28th European Conference on Solid-State Transducers (EUROSENSORS)/ Titel: Procedia Engineering 2014
Y1 - 2014
UR - https://linkinghub.elsevier.com/retrieve/pii/S187770581402387X
U6 - https://doi.org/10.1016/j.proeng.2014.11.272
IS - 87
SP - 88
EP - 91
PB - Elsevier
CY - Brescia, Italy
ER -
TY - CHAP
A1 - Schmidt, Marc-Peter
A1 - Oseev, Alexander
A1 - Engel, C.
A1 - Brose, Andreas
A1 - Hirsch, Sören
T1 - IMPEDANCE SPECTROSCOPY MICROFLUIDIC MULTICHANNEL SENSOR PLATFORM FOR LIQUID ANALYSIS
T2 - Konferenz: International Conference on Miniaturized Systems for Chemistry and Life Sciences/ Titel: 18th International Conference on Miniaturized Systems for Chemistry and Life Sciences : (MicroTAS 2014); San Antonio, Texas, USA, 26 - 30 October 2014 / [CBMS] ; Vol. 4
Y1 - 2014
UR - http://rgdoi.net/10.13140/2.1.4254.8004
SN - 978-1-63439-697-4
U6 - https://doi.org/10.13140/2.1.4254.8004
IS - 4
SP - 1957
EP - 2577
PB - Curran
CY - Red Hook, NY
ER -
TY - JOUR
A1 - Schmidt, Marc-Peter
A1 - Aman, Alexander
A1 - Majcherek, Sören
A1 - Hirsch, Sören
T1 - Microwave Sensor for Mechanical Stress Measurement Based on Ferroelectric Graphene Nanosheet Composites
JF - Procedia Engineering
Y1 - 2014
UR - https://linkinghub.elsevier.com/retrieve/pii/S1877705814025144
U6 - https://doi.org/10.1016/j.proeng.2014.11.399
SN - 18777058
SP - 124
EP - 127
PB - Elsevier
ER -
TY - RPRT
A1 - Goecke, Sven-Frithjof
A1 - Müller, Alexander
A1 - Ebert-Spiegel, Michael
T1 - ECOWELD - Energiegeregeltes Metallschutzgas- und Laserschweißen : "Ingenieurnachwuchs" 2011 (Maschinenbau) : Ausschreibung der Förderlinie "Qualifizierung von Ingenieurnachwuchs an Fachhochschulen" 2011 im Rahmen des Programms "Forschung an Fachhochschulen" : Schlussbericht : Laufzeit des Vorhabens von: 01.08.2011 bis: 31.03.2015
Y1 - 2015
U6 - https://doi.org/10.2314/GBV:867121742
ER -
TY - CHAP
A1 - Schmidt, Marc-Peter
A1 - Oseev, Aleksandr
A1 - Engel, Christian
A1 - Brose, Andreas
A1 - Hirsch, Sören
T1 - A7.1 - Flexible free-standing SU-8 microfluidic impendance spectroscopy sensor for 3D molded interconnect devices application
T2 - Konferenz: AMA Conferences 2015/ Titel: Proceedings SENSOR 2015
Y1 - 2015
UR - http://www.ama-science.org/doi/10.5162/sensor2015/A7.1
SN - 978-3-9813484-8-4
U6 - https://doi.org/10.5162/sensor2015/A7.1
SP - 151
EP - 155
PB - AMA Service GmbH
CY - Nürnberg, Germany
ER -
TY - CHAP
A1 - Schmidt, Marc-Peter
A1 - Oseev, Aleksandr
A1 - Lucklum, Ralf
A1 - Hirsch, Sören
ED - Sánchez-Rojas, José Luis
ED - Brama, Riccardo
T1 - Technology towards a SAW based phononic crystal sensor
T2 - Konferenz: SPIE Microtechnologies, Barcelona, Spain, 2015/ Titel: PROCEEDINGS VOLUME 9517 SPIE MICROTECHNOLOGIES | 4-6 MAY 2015 Smart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems
Y1 - 2015
UR - http://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2178810
U6 - https://doi.org/10.1117/12.2178810
ER -
TY - CHAP
A1 - Brämer, Stefan
A1 - Vieback, Linda
A1 - Schiller, Gregor
A1 - Hirsch, Sören
T1 - Situiertes Lernen in der dualen Berufsausbildung. Entwicklung eines Lehr-Lern-Arrangements für den Ausbildungsinhalt „Sicherheit und Gesundheitsschutz bei der Arbeit“
T2 - Konferenz: 61. GfA-Frühjahrskongress, 2015/ Titel: Verantwortung für die Arbeit der Zukunft 61. GfA-Frühjahrskongress, 25. - 27.02.2015, Karlsruhe
Y1 - 2015
SN - 978-3-936804-18-8
PB - GfA-Press
CY - Dortmund
ER -
TY - CHAP
A1 - Oseev, Aleksandr
A1 - Schmidt, Marc-Peter
A1 - Lucklum, Ralf
A1 - Zubtsov, Mikhail
A1 - Hirsch, Sören
T1 - Phononic crystal based liquid sensor governed by localized defect resonances
T2 - Konferenz: IEEE Symposium (IUS) Ultrasonics, 2015/ Titel: 2015 IEEE International Ultrasonics Symposium (IUS)
Y1 - 2015
UR - http://ieeexplore.ieee.org/document/7329492/
SN - 978-1-4799-8182-3
U6 - https://doi.org/10.1109/ULTSYM.2015.0053
SP - 1
EP - 4
PB - IEEE
CY - Taipei, Taiwan
ER -
TY - JOUR
A1 - Majcherek, Soeren
A1 - Aman, A.
A1 - Hirsch, Sören
A1 - Schmidt, B.
T1 - Silicon based in-situ measurement system for flex loads on MLCCs in PCB manufacturing chain
JF - Sensors and Actuators A: Physical
Y1 - 2015
UR - https://linkinghub.elsevier.com/retrieve/pii/S092442471530025X
U6 - https://doi.org/10.1016/j.sna.2015.06.005
SN - 09244247
IS - 233
SP - 267
EP - 274
PB - Elsevier
ER -
TY - JOUR
A1 - Aman, Alexander
A1 - Majcherek, Soeren
A1 - Hirsch, Sören
T1 - Microwave Emission of Carbon Fibres During Electrical Breakdown
JF - Sensor Letters
Y1 - 2015
UR - http://openurl.ingenta.com/content/xref?genre=article&issn=1546-198X&volume=13&issue=1&spage=98
U6 - https://doi.org/10.1166/sl.2015.3408
SN - 1546198X, 15461971
IS - Ausgabe: 1/ Heft: 13
SP - 98
EP - 101
PB - American Scientific Publishers
ER -
TY - CHAP
A1 - Schmidt, Marc-Peter
A1 - Oseev, Aleksandr
A1 - Lucklum, Ralf
A1 - Zubtsov, Mikhail
A1 - Hirsch, Sören
T1 - SAW based phononic crystal liquid sensor - Periodic microfluidic channels approach
T2 - Konferenz: 2016 IEEE International Ultrasonics Symposium (IUS)/ Titel:2016 IEEE International Ultrasonics Symposium (IUS)
N2 - Phononic crystals (PnC) with a specifically designed liquid-filled defect have been recently introduced as a novel sensor platform (Lucklum et al. in Sens Actuators B Chem 171–172:271–277, 2012). Sensors based on this principle feature a band gap covering the typical input span of the measurand as well as a narrow transmission peak within the band gap where the frequency of maximum transmission is governed by the measurand. This approach has been applied for determination of volumetric properties of liquids (Lucklum et al. in Sens Actuators B Chem 171–172:271–277, 2012; Oseev et al. in Sens Actuators B Chem 189:208–212, 2013; Lucklum and Li in Meas Sci Technol 20(12):124014, 2009) and has demonstrated attractive sensitivity. One way to improve sensitivity requires higher probing frequencies in the range of 100 MHz and above. In this range surface acoustic wave (SAW) devices are an established basis for sensors. We have performed first tests towards a PnC microsensors (Lucklum et al. in Towards a SAW based phononic crystal sensor platform. In: 2013 Joint European frequency and time forum and international frequency control symposium (EFTF/IFC), pp 69–72, 2013). The respective feature size of the PnC SAW sensor has dimensions in the range of 10 µm and below. Whereas those dimensions are state of the art for common MEMS materials, etching of holes and cavities in piezoelectric materials that have an aspect ratio diameter/depth is still challenging. In this contribution we describe an improved technological process able to realize considerably deep and uniform holes in a SAW substrate.
Y1 - 2016
UR - http://ieeexplore.ieee.org/document/7728788/
SN - 978-1-4673-9897-8
U6 - https://doi.org/10.1109/ULTSYM.2016.7728788
SP - 1
EP - 4
PB - IEEE
CY - Tours, France
ER -
TY - CHAP
A1 - Fomina, Marina A.
A1 - Koshuro, Vladimir A.
A1 - Fomin, Aleksandr A.
A1 - Rodionov, Igor V.
A1 - Skaptsov, Aleksandr A.
A1 - Zakharevich, Andrey M.
A1 - Aman, Alexander
A1 - Oseev, Aleksandr
A1 - Hirsch, Sören
A1 - Majcherek, Soeren
ED - Tuchin, Valery V.
ED - Derbov, Vladimir L.
ED - Postnov, Dmitry E.
ED - Meglinski, Igor V.
ED - Larin, Kirill V.
ED - Pravdin, Alexander B.
ED - Genina, Elina A.
T1 - Peculiarities of structure formation of layered metal-oxide system Ti-Ta-(Ti,Ta) x O y during electro-spark alloying and thermally stimulated modification
T2 - Konferenz: Saratov, Russian Federation/ Titel: PROCEEDINGS VOLUME 9917 SARATOV FALL MEETING 2015 | 22-25 SEPTEMBER 2015 Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS)
N2 - The study focuses on high-performance combined electro-spark alloying of titanium and titanium alloy (VT1-0, VT16) surface and porous matrix structure oxidation. The metal-oxide coatings morphology is the result of melt drop transfer, heat treatment, and oxidation. The study establishes the influence of technological regimes of alloying and oxidation on morphological heterogeneity of biocompatible layered metal-oxide system Ti-Ta-(Ti,Ta)xOy. It was found that during electro-spark alloying the concentration of tantalum on the titanium surface ranges from 0.1 to 3.2 at.%. Morphology of the deposited splats is represented by uniformly grown crystals of titanium and tantalum oxides, which increase from nano- to submicron size.
Y1 - 2016
UR - http://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2229491
U6 - https://doi.org/10.1117/12.2229491
PB - SPIE. Digital Library
CY - Saratov, Russian Federation
ER -
TY - JOUR
A1 - Lucklum, Ralf
A1 - Zubtsov, Mikhail
A1 - Oseev, Aleksandr
A1 - Schmidt, Marc-Peter
A1 - Hirsch, Sören
T1 - SAW Based Sandwich Phononic Crystal Sensor
JF - Procedia Engineering
N2 - Sensing is nowadays an accepted application of phononic crystals with chemical and biosensors for liquid analytes being the perhaps most promising ones. A liquid-filled defect is introduced that turns into a resonant cavity. Similar to the well-known resonant sensors sensitivity can be increased with higher operating frequencies. We introduce a Sandwiched Phononic Crystal (SPC), which applies a resonant cavity located between two stacked layers on top of a SAW device. Key challenges are coupling of surface acoustic wave into the liquid cavities and avoiding scattering of the guided waves into the bulk of the sensor chip.
Y1 - 2016
UR - https://linkinghub.elsevier.com/retrieve/pii/S1877705816335640
U6 - https://doi.org/10.1016/j.proeng.2016.11.251
SN - 18777058
IS - 168
SP - 700
EP - 703
PB - Elsevier
ER -
TY - JOUR
A1 - Aman, A.
A1 - Majcherek, Soeren
A1 - Schmidt, M. P.
A1 - Orseev, A.
A1 - Engel, C.
A1 - Hirsch, Sören
T1 - Behavior of Current Flow on Lead Zirconate Titanate Surfaces during Mechanical Impact
JF - Research & Reviews: Journal of Material Sciences
Y1 - 2016
UR - http://www.rroij.com/open-access/behavior-of-current-flow-on-lead-zirconate-titanate-surfacesduring-mechanical-impact-.php?aid=69107
U6 - https://doi.org/10.4172/2321-6212.1000137
SN - 23216212
IS - Ausgabe: 1/ Band: 4
PB - Research and Reviews
ER -
TY - JOUR
A1 - Schmidt, Marc-Peter
A1 - Oseev, Aleksandr
A1 - Lucklum, Ralf
A1 - Zubtsov, Mikhail
A1 - Hirsch, Sören
T1 - SAW based phononic crystal sensor, technological challenges and solutions
JF - Microsystem Technologies
Y1 - 2016
UR - http://link.springer.com/10.1007/s00542-015-2781-3
U6 - https://doi.org/10.1007/s00542-015-2781-3
SN - 0946-7076, 1432-1858
SP - 1593
EP - 1599
PB - Springer Link
ER -
TY - CHAP
A1 - Kramann, Guido
T1 - AOGscript – Design of a Stand-Alone Scripting Language for the Generation of Music. Proceedings of the International Symposium on Ubiquitous Music, 2023
T2 - Konferenz: 13th International Symposium on Ubiquitous Music 2023 (Ubimus23) , Ulster University, Derry~Londonderry, Northern Ireland, 2-4 November, 2023
N2 - Ubiquitous Music is an interdisciplinary research area that combines methodologies from music, computer science, education, creativity studies, human sciences and engineering.
The Ubiumus 2023 symposium, held at Ulster University and North West Regional College in Derry~Londonderry, Northern Ireland, included contributions on the following topics:
Rapid Prototyping and Live Environments
Ecological Approaches to Ubiquitous Music
Ubiquitous Music Creative Practices, Tools and Influences
The symposium also included a number of artistic contributions and workshops, which are also discussed in the proceedings volume. A number of events (including all paper presentations, an invited lecture, a panel discussion, and a keynote and associated performance) were also documented via video, with a link available in this Proceedings volume.
Y1 - 2023
UR - https://zenodo.org/records/10670220
SN - 978-65-00-85069-7
U6 - https://doi.org/10.5281/zenodo.10670220
SP - 95
EP - 109
PB - Zenodo
ER -
TY - CHAP
A1 - Guido, Kramann
T1 - AOGscript, Generative Code as Conceptual Artwork: Giving Space to Astonishment. Proceedings of xCoAx 2023
T2 - Konferenz: xCoAx 2023 11th Conference on Computation, Communication, Aesthetics & X
Y1 - 2023
UR - https://2023.xcoax.org/xcoax2023.pdf
SN - 978-989-9049-52-9
U6 - https://doi.org/10.34626/xcoax.2023
SP - 401
EP - 408
PB - i2ADS
CY - Porto, Portugal
ER -
TY - CHAP
A1 - Markgraf, Klaus
A1 - Dietrich, Benjamin
A1 - Müller, Katja
A1 - Flassig, Robert J
A1 - Flassig, Peter Michael
T1 - FINEconcepts - Wissenstransfer und Energiesystemoptimierung mithilfe des digitalen Zwillings
T2 - Konferenz: NWK 2023, HS Harz
N2 - Climate change, but also geopolitical circumstances, are moving topics such as energy efficiency and renewable energies more and more into the focus of the population, economy , and politics. As a result, the will to optimize new and existing energy systems extends from private individuals to companies and even entire communities. This work describes the development and usage of a new software called FINEconcepts which creates a digital twin of an energy system. This virtual model can then be used to optimize the energy system based on annual costs, CO2 emissions or other relevant criteria such as self-sufficiency. Because all system components, which include renewable technologies as well, can be added as a building block with chosen but changeable parameters, the software allows the user to explore and awaken interest and understanding of technologies that were previously considered too costly, irrelevant, or unrealistic. Implemented projects in small and large companies as well as in residential areas did prove, that the usage of FINEconcepts leads not only to more efficient energy systems by increasing the use of renewable energy, but also increased knowledge and understanding in terms of energy. Besides economics, ecology and security, understanding is an equally important factor in achieving a sustainable energy supply.
Y1 - 2023
SP - 428
EP - 435
ER -
TY - JOUR
A1 - Vega, Catherine Perez
A1 - Jechow, Andreas
A1 - James A., Campbell
A1 - Zielinska-Dabkowska, Karolina M.
A1 - Hoelker, Franz
T1 - Light pollution from illuminated bridges as a potential barrier for migrating fish-Linking measurements with a proposal for a conceptual model
JF - Basic and Applied Ecology
N2 - Illuminated bridges have become important assets to navigable aquatic systems. However, if artificial light at night (ALAN) from illuminated bridges reaches aquatic habitats, such as rivers, it can threaten the river's natural heterogeneity and alter the behavioural responses of migratory fish. Here, via a pilot study, we quantified levels of ALAN at illuminated bridges that cross a river and, propose a conceptual model to estimate its potential implications on two migrating fish species with contrasting life histories. Night-time light measurements on the river Spree in Berlin were performed continuously along a transect and in detail at seven illuminated bridges. Photometric data of the pilot study showed rapidly increased and decreased light levels at several illuminated bridges from which we derived several model illumination scenarios. These illumination scenarios and their potential effect on migrating Atlantic salmon smolts (Salmo salar) and European silver eel (Anguilla anguilla) are presented as a conceptual model, considering illuminated bridges as behavioural barriers to fish migration. ALAN's adverse effects on freshwater habitats must be better researched, understood, managed, and properly communicated to develop future sustainable lighting practices and policies that preserve riverscapes and their biodiversity.
Y1 - 2023
UR - https://www.sciencedirect.com/science/article/pii/S1439179123000658?via%3Dihub
U6 - https://doi.org/10.1016/j.baae.2023.11.001
SN - 1618-0089
VL - 74
SP - 1
EP - 12
PB - Elsevier
ER -
TY - JOUR
A1 - Vollmer, Michael
T1 - So weit das Auge trägt
JF - Physik in unserer Zeit
N2 - Sichtweiten in der Atmosphäre reichen von wenigen Metern im Nebel bis zu einigen hundert Kilometern bei extrem guten Fernsichtbedingungen. Die zugrundeliegende Physik geht vom Wahrnehmungskontrast aus. Dieser ändert sich mit der Entfernung entlang der Sichtlinie zwischen Objekt und Auge aufgrund von Lichtstreuung und Absorption an den Bestandteilen der Atmosphäre. Dazu kommt bei der Fernsicht die Refraktion, die es erlaubt, auch über den durch die Kugelform der Erde geometrisch bedingten Horizont hinaus zu sehen.
Y1 - 2023
UR - https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/piuz.202301675
U6 - https://doi.org/10.1002/piuz.202301675
SN - 1521-3943
VL - 54
IS - 5
SP - 222
EP - 230
PB - Wiley
ER -
TY - CHAP
A1 - Markgraf, Klaus
T1 - Entwicklung eines Tools zur spezifischen, lastgangbasierten Eigenverbrauchsoptimierung mittels PV-Leistungsprognose
T2 - Konferenz: 18. Symposium Energieinnovation, 2024, Graz/Austria
N2 - The German government's initiative to cover 80% of the gross electricity supply with renewable energies by 2050 brings considerable ecological benefits, but also poses several challenges. One of these challenges is the growing number of photovoltaic systems (PV systems), which, due to their high feed-in power, already pose a risk to the security of the electricity distribution grid during long periods of sunny weather. To counteract this, active research is being carried out in the field of PV power forecasting. This research is primarily aimed at providing the grid operator with a predicted power output, which enables a longer planning horizon and thus increases the operational grid security. However, the considerable annual electricity consumption of private households and the increasing spread of PV systems for self-consumption show that the energy behavior of households, especially self-consumption, also influences grid security. Additionally, households have an incentive to boost their self-consumption because the cost of drawing each kilowatt-hour from the grid is substantially higher than the compensation received for injecting an equivalent amount of energy back into the grid. However, as of now, there is no software available that easily enables households to tailor the usage patterns of their electrical appliances according to a photovoltaic (PV) forecast. The project described here aims to close this gap by creating such software. Various PV forecasting models are used and tested for their suitability for this purpose. A self-generated optimization process is implemented in this project to optimize the consumer configuration based on the PV forecasts. The here-developed tool enables the user to enter parameters for his PV system and the specific load profiles of his electrical appliances. Based on this data, the optimization algorithm determines a consumption plan with a forecast horizon until the end of the next day that maximizes the user's self-consumption. To validate the tool, the optimization process is carried out over a period of 60 days using a predefined scenario and the results are compared with a scenario in which the electrical appliances are intuitively operated at midday. The analysis of these results ultimately shows the potential impact of such a tool on the economic efficiency of private households and the supply stability.
Y1 - 2024
U6 - https://doi.org/10.6084/m9.figshare.25610976
SP - 1
EP - 10
ER -
TY - JOUR
A1 - Ayalon, Inbal
A1 - Avisar, Dror
A1 - Jechow, Andreas
A1 - Levy, Oren
T1 - Corals nitrogen and carbon isotopic signatures alters under Artificial Light at Night (ALAN)
JF - The Science of The Total Environment
N2 - This study examines the impact of Artificial Light at Night (ALAN) on two coral species, Acropora eurystoma and Pocillopora damicornis, in the Gulf of Aqaba/Eilat Red Sea, assessing their natural isotopic responses to highlight changes in energy and nutrient sourcing due to sensory light pollution. Our findings indicate significant disturbances in photosynthetic processes in Acropora eurystoma, as evidenced by shifts in δ13C values under ALAN, pointing to alterations in carbon distribution or utilization. In Pocillopora damicornis, similar trends were observed, with changes in δ13C and δ15N values suggesting a disruption in its nitrogen cycle and feeding strategies.
The study also uncovers species-specific variations in heterotrophic feeding, a crucial factor in coral resilience under environmental stress, contributing to the corals' fixed carbon budget. Light measurements across the Gulf demonstrated a gradient of light pollution which possess the potential of affecting marine biology in the region. ALAN was found to disrupt natural diurnal tentacle behaviors in both coral species, crucial for prey capture and nutrient acquisition, thereby impacting their isotopic composition and health.
Echoing previous research, our study underscores the need to consider each species' ecological and physiological contexts when assessing the impacts of anthropogenic changes. The findings offer important insights into the complexities of marine ecosystems under environmental stress and highlight the urgency of developing effective mitigation strategies.
Y1 - 2024
U6 - https://doi.org/10.1016/j.scitotenv.2024.170513
IS - 920
PB - Elsevier
ER -
TY - JOUR
A1 - Maleki, Maniya
A1 - Mohammadi, Mahdieh
T1 - Velocity and pressure functions of an oscillating flow in a circular Hele-Shaw cell
JF - Iranian Journal of Physics Research
N2 - In this study, we have investigated the form of velocity and pressure functions of a fluid oscillating between two parallel glass sheets that form a circular Hele-Shaw cell. The flow has been considered to be radial, incompressible and laminar. The time-dependent Navier-Stokes equation has been solved in cylindrical coordinates using Fourier transform, and the oscillating flow velocity across the thickness of the cell has been obtained at different times. The flow velocity function in the unsteady state is related to the vertical component of the coordinates in the form of parabolic functions and also to the inverse of the radial component. The time dependence appears as a simple harmonic with a frequency equal to the oscillation frequency. The velocity of the flow is maximum at the middle of the cell along its height and gradually decreases from the middle towards the top or bottom plane and reaches zero. Pressure does not depend on the height and changes logarithmically with the radius. The dependence of pressure on time is also a simple harmonic with the external frequency, but it has a phase shift with respect to the velocity.
Y1 - 2023
U6 - https://doi.org/10.47176/ijpr.22.1.81304
VL - 22
IS - 1
SP - 113
EP - 120
PB - Physics Society of Iran
ER -
TY - JOUR
A1 - Trittel, Torsten
A1 - Puzyrev, Dmitry
A1 - Stannarius, Ralf
T1 - Platonic solids bouncing on a vibrating plate
JF - Physical Review E
N2 - The energy transfer between bouncing particles and rigid boundaries during impacts is crucially influenced not only by restitution coefficients of the material but also by particle shapes. This is particularly important when such particles are mechanically agitated with vibrating plates. Inertial measurement units are able to measure all acceleration and rotational velocity components of an object and store these data for subsequent analysis. We employ them to measure the dynamics of cubes and icosahedra on vibrating plates to study the efficiency of energy transfer into the individual degrees of freedom (DOFs) of the excited object. The rotational DOFs turn out to be much less excited than the vertical translational motion. Most remarkably, there is only little difference between the two Platonic solids in both the absolute energies and the energy partition ratios.
Y1 - 2024
U6 - https://doi.org/10.1103/PhysRevE.109.034903
VL - 109
IS - 3
PB - American Physical Society
ER -
TY - JOUR
A1 - Lachowski, Krzysztof
A1 - Hammermeister, Florian
A1 - Halenz, Bastian
A1 - Lieckefett, Florian
A1 - Götze, Thomas
A1 - Prill, Robert
A1 - Becker, Roland
T1 - The Patellostabilometer: A New Device for Quantification of Mediolateral Patella Displacement
JF - Sensors
N2 - Mediolateral patella displacement is of interest for diagnostics and clinically relevant
research questions. Apart from manual testing, no standardized method is currently available. Proper
quantification of patella mobility is necessary to better understand pathologies at the patellofemoral
joint. Patella mobility was assessed in 25 healthy individuals using a Patellostabilometer, a new
prototype instrument for quantification of the mediolateral patella displacement. The participants
underwent measurements of the mediolateral displacement three times using the Patellostabilome-
ter. A maximal force of 10 N was applied for patella movement. Additionally, leg length and
circumference of the knee, upper- and lower-leg were measured. Lateral patella displacement of
18.27 ± 3.76 mm (range 15.85–20.64 mm, interquartile range (IQR) of 4.79) was measured. The medial
patella displacement showed 24.47 ± 6.59 mm (range 19.29–29.76 mm, IQR of 10.47). The test–retest
measurement error was 2.32 ± 1.76 mm (IQR of 2.38 mm), with five outliers. There was greater
test–retest variability between the measurements of the medial displacement compared to the lateral
one. The test–retest variability reached 7% of the patella displacement. Other parameters provided no
significant correlations. Based on the natural patellofemoral mobility, a precise and clinically relevant
quantification of patella mobility is allowed.
Y1 - 2023
UR - https://www.mdpi.com/1424-8220/23/3/1274
U6 - https://doi.org/https://doi.org/10.3390/s23031274
IS - 23 (3)
PB - MDPI
ER -
TY - JOUR
A1 - Rizun, Nina
A1 - Revina, Aleksandra
A1 - Edelmann, Noella
T1 - Application of Text Analytics in Public Service Co-Creation: Literature Review and Research Framework
JF - DG.O 2023: The 24th Annual International Conference on Digital Government Research
N2 - The public sector faces several challenges, such as a number of external and internal demands for change, citizens' dissatisfaction and frustration with public sector organizations, that need to be addressed. An alternative to the traditional top-down development of public services is co-creation of public services. Co-creation promotes collaboration between stakeholders with the aim to create better public services and achieve public values. At the same time, data analytics has been fuelled by the availability of immense amounts of textual data. Whilst both co-creation and TA have been used in the private sector, we study existing works on the application of Text Analytics (TA) techniques on text data to support public service co-creation. We systematically review 75 of the 979 papers that focus directly or indirectly on the application of TA in the context of public service development. In our review, we analyze the TA techniques, the public service they support, public value outcomes, and the co-creation phase they are used in. Our findings indicate that the TA implementation for co-creation is still in its early stages and thus still limited. Our research framework promotes the concept and stimulates the strengthening of the role of Text Analytics techniques to support public sector organisations and their use of co-creation process. From policy-makers' and public administration managers' standpoints, our findings and the proposed research framework can be used as a guideline in developing a strategy for the designing co-created and user-centred public services.
Y1 - 2023
UR - https://dl.acm.org/doi/10.1145/3598469.3598471
U6 - https://doi.org/10.1145/3598469.3598471
SP - 12
EP - 22
PB - Association for Computing Machinery
ER -
TY - JOUR
A1 - Stannarius, Ralf
A1 - Harth, Kirsten
T1 - The structure of disintegrating defect clusters in smectic C freely suspended films
JF - Soft Matter
N2 - Disclinations or disclination clusters in smectic C freely suspended films with topological charges larger than one are unstable. They disintegrate, preferably in a spatially symmetric fashion, into single defects with individual charges of +1, which is the smallest positive topological charge allowed in polar vector fields. While the opposite process of defect annihilation is well-defined by the initial defect positions, disintegration starts from a singular state and the following scenario including the emerging regular defect patterns must be selected by specific mechanisms. We analyze experimental data and compare them with a simple model where the defect clusters adiabatically pass quasi-equilibrium solutions in one-constant approximation. It is found that the defects arrange in geometrical patterns that correspond very closely to superimposed singular defect solutions, without additional director distortions. The patterns expand by affine transformations where all distances between individual defects scale with the same time-dependent scaling factor proportional to the square-root of time.
Y1 - 2023
UR - https://pubs.rsc.org/en/content/articlelanding/2023/sm/d3sm00808h
U6 - https://doi.org/https://doi.org/10.1039/d3sm00808h
IS - 19
SP - 6109
EP - 6115
PB - Royal Society of Chemistry
ER -
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 -