TY - CHAP
A1 - Hirsch, Sören
A1 - Brämer, Stefan
T1 - Alumni of Vocational Education as a New Target Group for University Continuing Education
T2 - Universities and Engagement: International perspectives on higher education and lifelong learning
Y1 - 2015
U6 - https://doi.org/10.4324/9781315740669
SP - 39
EP - 53
PB - Routledge
CY - London
ET - 1
ER -
TY - JOUR
A1 - Hirsch, Sören
A1 - Majcherek, S.
A1 - Aman, A.
A1 - Schmidt, B.
T1 - Microwave emission from lead zirconate titanate induced by impulsive mechanical load
JF - Journal of Applied Physics
Y1 - 2015
U6 - https://doi.org/10.1063/1.4934735
VL - 118
IS - 16
SP - 164105-1
EP - 164105-7
ER -
TY - JOUR
A1 - Hirsch, Sören
A1 - Pisarevskiy, A.
A1 - Tatmyshevskiy, K.
A1 - Tomas, J.
A1 - Aman, S.
T1 - Light emission during impact stressing of a particle layer
JF - Measurement Science and Technology
Y1 - 2015
U6 - https://doi.org/10.1088/0957-0233/26/4/045103
VL - 26
IS - 4
ER -
TY - JOUR
A1 - Agafonova, D. S.
A1 - Kozyrev, A. B.
A1 - Mukhin, N. V.
A1 - Red'ka, D. N.
A1 - Elanskaya, G. K.
A1 - Rudenko, M. V.
A1 - Oseev, A.
A1 - Hirsch, Sören
T1 - Impurity Phases in Polycrystalline Films of Ferroelectric Oxides of the Perovskite-Type on the Basis of Bi2SrTa2O9 and Pb(Zr,Ti)O3
JF - Glass Physics and Chemistry
KW - complex oxides
KW - perovskites
KW - heterophase films
KW - nonstoichiometry
Y1 - 2018
U6 - https://doi.org/10.1134/S1087659618010029
VL - 44
IS - 1
SP - 15
EP - 20
ER -
TY - JOUR
A1 - Oseev, Aleksandr
A1 - Mukhin, Nikolay
A1 - Lucklum, Ralf
A1 - Zubtsov, Mikhail
A1 - Schmidt, Marc-Peter
A1 - Steinmann, Ulrike
A1 - Fomin, Aleksandr
A1 - Kozyrev, Andrey
A1 - Hirsch, Sören
T1 - Study of liquid resonances in solid-liquid composite periodic structures (phononic crystals) – theoretical investigations and practical application for in-line analysis of conventional petroleum products
JF - Sensors and Actuators B: Chemical
KW - Phononic crystal sensor
KW - Periodic composite structure
KW - Ultrasonic sensor
KW - Gasoline sensor
KW - Petroleum sensor
KW - In-line fuel sensor
Y1 - 2018
U6 - https://doi.org/10.1016/j.snb.2017.10.144
VL - 257
SP - 469
EP - 477
ER -
TY - JOUR
A1 - Kurachkina, Margarita
A1 - Konshina, Elena
A1 - Oseev, Aleksandr
A1 - Hirsch, Sören
T1 - Hybrid structures based on gold nanoparticles and semiconductor quantum dots for biosensor applications
JF - Nanotechnology Science and Applications
Y1 - 2018
U6 - https://doi.org/10.2147/nsa.s155045
VL - 11
SP - 15
EP - 21
ER -
TY - JOUR
A1 - Mukhin, N.V.
A1 - Redka, D. N.
A1 - Tarasov, S. A.
A1 - Oseev, A. Yu.
A1 - Hirsch, Sören
T1 - Two-Dimensional Periodic Composite Structure for Acoustic Sensor of Volumetric Properties of Liquids
T1 - Dvumernaja periodičeskaja kompozitnaja struktura dlja akustičeskogo datčika ob"emnych svojstv židkosti
JF - Journal of the Russian Universities. Radioelectronics
JF - Izvestija vysšich učebnych zavedenij Rossii : radioėlektronika
Y1 - 2018
U6 - https://doi.org/10.32603/1993-8985-2018-21-1-56-63
IS - 1
SP - 56
EP - 63
ER -
TY - CHAP
A1 - Redka, D.
A1 - Mukhin, N.
A1 - Grishkanich, A.
A1 - Terukov, E.
A1 - Hirsch, Sören
T1 - Surface modification of ZnO for solar converters by NdYaG Laser
T2 - International Conference Laser Optics (ICLO), St. Petersburg, 2018
Y1 - 2018
U6 - https://doi.org/10.1109/LO.2018.8435248
SP - 340
EP - 340
PB - IEEE
ER -
TY - JOUR
A1 - Oseev, Aleksandr
A1 - Mukhin, Nikolay V.
A1 - Lucklum, Ralf
A1 - Zubtsov, Mikhail
A1 - Schmidt, Marc-Peter
A1 - Redka, Dmitrii
A1 - Kozyrev, Andrey
A1 - Hirsch, Sören
T1 - Towards macroporous phononic crystal based structures for FBAR applications. Theoretical investigation of technologically competitive solutions
JF - Microsystem Technologies
Y1 - 2018
U6 - https://doi.org/10.1007/s00542-017-3616-1
VL - 24
IS - 5
SP - 2389
EP - 2399
ER -
TY - CHAP
A1 - Platonov, R. A.
A1 - Altynnikov, A. G.
A1 - Mikhailov, A. K.
A1 - Yastrebov, A. V.
A1 - Mukhin, N. V.
A1 - Hirsch, Sören
A1 - Kozyrev, A. B.
T1 - Tunable impedance microwave matching of laser diodes
T2 - Konferenz: 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)/ Titel: 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)
Y1 - 2017
UR - http://ieeexplore.ieee.org/document/8261920/
SN - 978-1-5090-6269-0
U6 - https://doi.org/10.1109/PIERS.2017.8261920
SP - 1152
EP - 1157
PB - IEEE
CY - St Petersburg, Russia
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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - CHAP
A1 - Kersten, Philipp
A1 - Buzin, Johannes
A1 - Hirsch, Sören
T1 - Wireless Sensor Nodes for Condition Based Maintenance in Railway Systems
T2 - IEEE Sensors Conference, Kobe, Japan, 2024
N2 - Ensuring the reliability, safety, and efficiency of railway systems is increasingly critical in global transportation networks. This paper addresses the necessity for advanced monitoring systems by introducing a multivariate energy-efficient wireless sensor node designed for proactive maintenance in rail applications.
Y1 - 2024
UR - https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10784508
U6 - https://doi.org/10.1109/SENSORS60989.2024.10784508
SP - 1
EP - 4
PB - IEEE
ER -
TY - JOUR
A1 - Daupayev, Nursultan
A1 - Engel, Christian
A1 - Hirsch, Sören
T1 - Two-to-One Trigger Mechanism for Event-Based Environmental Sensing
JF - Sensors
N2 - Environmental monitoring systems often operate continuously, measuring various parameters, including carbon dioxide levels (CO2), relative humidity (RH), temperature (T), and other factors that affect environmental conditions. Such systems are often referred to as smart systems because they can autonomously monitor and respond to environmental conditions and can be integrated both indoors and outdoors to detect, for example, structural anomalies. However, these systems typically have high energy consumption, data overload, and large equipment sizes, which makes them difficult to install in constrained spaces. Therefore, three challenges remain unresolved: efficient energy use, accurate data measurement, and compact installation. To address these limitations, this study proposes a two-to-one threshold sampling approach, where the CO2 measurement is activated when the specified T and RH change thresholds are exceeded. This event-driven method avoids redundant data collection, minimizes power consumption, and is suitable for resource-constrained embedded systems. The proposed approach was implemented on a low-power, small-form and self-made multivariate sensor based on the PIC16LF19156 microcontroller. In contrast, a commercial monitoring system and sensor modules based on the Arduino Uno were used for comparison. As a result, by activating only key points in the T and RH signals, the number of CO2 measurements was significantly reduced without loss of essential signal characteristics. Signal reconstruction from the reduced points demonstrated high accuracy, with a mean absolute error (MAE) of 0.0089 and root mean squared error (RMSE) of 0.0117. Despite reducing the number of CO2 measurements by approximately 41.9%, the essential characteristics of the signal were saved, highlighting the efficiency of the proposed approach. Despite its effectiveness in controlled conditions (in buildings, indoors), environmental factors such as the presence of people, ventilation systems, and room layout can significantly alter the dynamics of CO2 concentrations, which may limit the implementation of this approach. Future studies will focus on the study of adaptive threshold mechanisms and context-dependent models that can adjust to changing conditions. This approach will expand the scope of application of the proposed two-to-one sampling technique in various practical situations.
Y1 - 2025
UR - https://www.mdpi.com/1424-8220/25/13/4107
U6 - https://doi.org/10.3390/s25134107
VL - 25
IS - 13
SP - 1
EP - 18
PB - MDPI
ER -
TY - CHAP
A1 - Daupayev, Nursultan
A1 - Reber, Paul
A1 - Bendyk, Ricky
A1 - Engel, Christian
A1 - Hirsch, Sören
T1 - Data Reduction for Energy-Constrained Sensors via Event-Aware Sampling
T2 - Konferenz: 2025 IEEE SENSORS, Vancouver, BC, Canada, 2025
N2 - Environmental monitoring plays a crucial role in analyzing environmental parameters and detecting anomalies. However, sensor systems work continuously, which results in constant energy consumption and data redundancy, especially for sensors with limited computing power and memory. In addition, installing and maintaining sensors in remote places creates additional challenges. An adaptive environmental sensing approach is developed to reduce data redundancy and energy consumption. A custom-designed sensor based on PIC16LF19156 microcontroller measures CO2, humidity and temperature simultaneously. The sensor is connected to a Raspberry Pi, where a signal processing algorithm is executed, aimed at reducing data redundancy, thereby increasing the energy efficiency of the system. The algorithm includes the discrete wavelet transform (DWT) to extract spectral features from the signals. A machine learning model trained on previous data estimates the daily variability of the signal and saves data labeled as SAVE (deviations) or SKIP (consistency). As a result, only the relevant intervals showing significant fluctuations are retained. The effectiveness of the proposed approach was evaluated by reconstructing the compressed signals and comparing them with the original data based on RMSE and MAE metrics, which confirms the insignificant loss of information.
Y1 - 2025
SN - 979-8-3315-4467-6
U6 - https://doi.org/10.1109/SENSORS59705.2025.11330656
SN - 2168-9229
SP - 1
EP - 4
PB - IEEE
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 - MDPI
ER -
TY - JOUR
A1 - Redka, D.
A1 - Mukhin, N.
A1 - Grishkanich, A.
A1 - Terukov, E.
A1 - Hirsch, Sören
A1 - Ignateva, L.
T1 - NdYAG surface modification of ZnO for solar cells
JF - Journal of Physics: Conference Series
Y1 - 2019
U6 - https://doi.org/10.1088/1742-6596/1410/1/012106
VL - 1410
SP - 012106
PB - IOP Science
ER -