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7th IEEE Conference on Dependable and Secure Computing, DSC 2024

作者： Yavuz, Sinan Naroska, Edwin Daniel, Kai University of Siegen Department of Electrical Engineering and Computer Science Siegen Germany Niederrhein University of Applied Sciences Department of Electrical Engineering and Computer Science Krefeld Germany Institute of Measurement and Sensor Technology University of Applied Sciences Ruhr West Mülheim Germany

ISBN: (纸本)9798331540289

The security of IoT (Internet of Things) devices and the protection of sensitive information processed by these devices such as personal data, sensor values, process-related information is an important and difficult challenge. A major task in IoT communication is secure identification of devices. Unfortunately, traditional cryptographic methods are often not suitable for IoT devices due to their limited hardware resources. However, typical methods are computationally intensive, require a large amount of memory, and have a high-power consumption. On the other hand, Physical Unclonable Functions (PUFs) are low-cost and lightweight hardware-based primitives that can be used as a security component to protect data against third parties and thus increase security of a device. In this paper, the challenges and vulnerabilities in the development of PUF-based authentication protocols are presented. To this end, a security analysis of different approaches known from literature are discussed. Furthermore, possible attack vectors and prevention techniques are also considered. © 2024 IEEE.

关键词： Authentication Protocol

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Towards an Enhanced Metrology Analysis Procedure for Assessing Position Accuracy of Edge-Emitting Lasers to Photonic Integrated Circuits

Towards an Enhanced Metrology Analysis Procedure for Assessi...

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IEEE Photonics Conference (IPC)

作者： Jakob Wilhelm Hinum-Wagner Jochen Kraft Victor Sidorov Samuel Hoermann Gandolf Feigl Alexander Bergmann Ams Osram Group Premstaetten Austria Institute of Electrical Measurement and Sensor Systems Graz University of Technology Graz Austria

ISBN: (数字)9798350361957

ISBN: (纸本)9798350361964

Advanced photonic integrated systems require precise light source coupling, especially with edge-emitting lasers. This paper discusses how passive 2D alignment achieves below-micron accuracy. It introduces a metrology procedure for consistent analysis of the positioning process in manufacturing, ensuring optimal performance and reliable failure analysis.

关键词： Semiconductor device measurement Micrometers Accuracy Lasers Photonic integrated circuits Metrology Assembly Surface treatment Standards Photonics

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Influences on the propagation of light beams by the near surface layer of atmosphere and the correction methods 6

Influences on the propagation of light beams by the near sur...

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6th Conference on Frontiers in Optical Imaging and technology: Imaging Detection and Target Recognition

作者： Yunqiang, Lai Shangmin, Lin Hu, Wang Xuan, Zhang Yu, Jin Wenlong, He Yaoke, Xue Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences Xi’an710119 China Beijing101408 China Xi’an Space Sensor Optical Technology Engineering Research Center Xi'an710119 China Key Laboratory of Space Precision Measurement Technology Chinese Academy of Sciences Xi’an710119 China

ISBN: (数字)9781510679733

ISBN: (纸本)9781510679726

With the increasingly widespread and important application of optics in modern human life and production, research on the propagation characteristics and correction methods of light beams in the atmosphere near the ground surface is becoming increasingly important. The complex atmospheric environment near the ground can affect the propagation of light beams, causing effects such as energy attenuation, beam expansion, beam drift, intensity flicker, phase fluctuations, etc., reducing the quality of beam propagation and affecting the performance of optical applications in various fields. A review was conducted on the impact of near-Earth atmosphere on beam propagation and its correction methods, mainly elaborating on the effects of atmospheric absorption, scattering, and turbulence on beam propagation. Correction methods such as adaptive optics, large aperture receiving, spatial diversity, partially coherent light propagation, and image processing are proposed. © 2024 SPIE. All rights reserved.

关键词： Optical data processing

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Inverse Problem Approach for Estimating Operating Conditions and Uncertainty Quantification in Actual Forced Convection System

Inverse Problem Approach for Estimating Operating Conditions...

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2024 International Congress on Advances in Nuclear Power Plants, ICAPP 2024

作者： Kim, Haeseong Cetiner, Sacit Bucci, Matteo Nuclear Science and Technology Department Massachusetts Institute of Technology CambridgeMA United States INL MIT Center for Reactor Instrumentation and Sensor Physics MIT Nuclear Reactor Laboratory CambridgeMA United States Measurement Sciences Laboratory Idaho National Laboratory Idaho FallID United States

ISBN: (纸本)9780894487996

In this work, we apply the inverse problem method to infer operating conditions and simultaneously quantify uncertainties in steady-state turbulent forced convection systems. This approach dealt with reduced variable dimensions using prior knowledge of the system to avoid underdetermined problems. The methodology encompasses modeling the heat transfer system with the energy equation, employing Newton's method to solve the inverse problem, and quantifying total uncertainties arising from various sources. Significantly, this study extends the inverse heat transfer problem's scope to the actual thermal-fluid problem, overcoming the challenge of minimal sensor usage while ensuring the accuracy of estimation. This work not only demonstrates the application of inverse problem-solving in thermal-fluid systems but also contributes to the further development of sparse sensing methods. The results of this study enhance thermal system monitoring and control efficiency with broader industrial and environmental applications. They also lay the groundwork for advanced sparse sensing and inverse problem-solving, transforming thermal system analysis and optimization methods. © ICAPP *** rights reserved.

关键词： Forced convection

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Simulation of a temperature-compensated palladium-based fiber optic hydrogen sensor and comparison with measurements

Simulation of a temperature-compensated palladium-based fibe...

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2023 European Workshop on Optical Fibre sensors, EWOFS 2023

作者： Buchfellner, Fabian Bian, Qiang Röhrl, Alexander Zhang, Fan Hu, Wenbin Yang, Minghong Koch, Alexander W. Roths, Johannes Photonics Lab Munich University of Applied Sciences Munich80335 Germany Institute for Measurement Systems and Sensor Technology Technical University Munich Munich80333 Germany National Engineering Research Center for Optical Fiber Sensing Technology Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9781510665002

A temperature-compensated sensor architecture for a fiber optic hydrogen sensor consisting of a partly palladium-coated pi-shifted fiber Bragg grating was modeled and compared with measurements. The transfer matrix formalism was used to calculate the spectral line shape of the pi-shifted FBG with a hydrogen-induced, non-homogeneous strain distribution along the grating axis. The temperature response of the grating itself can be compensated by referencing the notch to the flank wavelength. In addition, the hydrogen solubility in Pd shows a non-linear temperature dependence that was also included in the sensor performance calculations. For the investigated H2 concentration range of 200 ppm to 20000 ppm and between 15 °C and 40 °C, measurement data fit well to the simulation above 3000 ppm but become diffuse below, indicating deviations from the expected dependence according to Sieverts’ square root law. © 2023 SPIE.

关键词： Fiber Bragg gratings

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Data-driven insight into propagation and bend losses in silicon nitride waveguides using classification and regression trees and design of experiments

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Optical Materials Express 2025年第6期15卷 1278-1293页

作者： Jakob Wilhelm Hinum-Wagner Peter Scheibelhofer Samuel Marko Hörmann Christoph Schmidt Golf Feigl Jochen Kraft Alexer Bergmann Institute of Electrical Measurement and Sensor Systems Graz University of Technology Inffeldgasse 33 8010 Graz Austria ams OSRAM Group Tobelbaderstraße 30 8141 Premstaetten Austria

Photonic integrated circuits play a pivotal role in high-speed telecommunications and sensing, yet minimizing optical losses in scalable fabrication remains a persistent challenge. This study focuses on silicon nitride waveguides and applies a full-factorial design of experiments combined with regression trees to identify the layer-specific origins of propagation and bend excess losses. Regression tree modeling revealed that waveguide width is the dominant predictor of propagation loss, followed by material composition—particularly the upper cladding at lower widths and the waveguide core material at higher widths—highlighting the confinement-dependent interplay of scattering and absorption. Bend excess loss analysis indicated a shift in dominant predictors from bend radius and width to waveguide material at smaller radii. Although these dependencies have been previously established through physical modeling and experimental studies, most prior work covers smaller datasets or relies on idealized fabrication assumptions. The results of this work establish a statistically grounded and interpretable framework for waveguide loss analysis and underscore classification and regression trees’ utility in photonic process optimization. Our approach complements existing physical frameworks by providing a statistically grounded, data-driven method to optimize SiN photonic platforms, offering predictive insight into complex layer—geometry interactions and fabrication-induced variations that are difficult to model physically. By enabling predictive insight into layer—geometry interactions, this approach paves the way for more robust photonic integrated-circuit design in sensing and next-generation optical *** by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License . Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

关键词： Bend loss Integrated photonics Optical signals Optical systems Silicon nitride Waveguide cores

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Brightness and Lifetime Improved Light-Emitting Diodes from Sr-Doped Quasi-Two-Dimensional Perovskite Layers

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Tsinghua Science and technology 2023年第1期28卷 131-140页

作者： Dan Chen Taoran Liu Yuhua Zuo Chuanbo Li Jun Zheng Zhi Liu Baoyu Liu Buwen Cheng State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Science Minzu University of ChinaBeijing 100081China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for SensorMOE Key Laboratory for Modern Measurement and Control Technologyand Beijing Information Science and Technology UniversityBeijing 100101China

Green Perovskite Light-Emitting Diodes(PeLEDs)have attracted wide attention for full spectrum ***,the inferior film morphology and luminescence property of quasi-two-dimensional(quasi-2D)perovskite layers limit the photoelectric property of the *** this paper,the effect of strontium(Sr)doped in quasi-2D perovskite layers is investigated to obtain a high-quality active *** morphologies and optical properties of Sr-doped quasi-2D perovskite films with different concentrations are *** the addition of strontium,more low-dimensional-layer perovskite phases(n D 2 and n D 3)appear in quasi-2D perovskite films,providing efficient intraband carrier funneling pathway and facilitating radiative *** photoluminescence(PL)peak intensity of optimized Sr-doped quasi-2D perovskite layers increases 50%compared with the non-strontium ***,green PeLEDs based on a Sr-doped quasi-2D perovskite layer reach a maximum luminance(Lmax)of 2943.77 cd/m^(2),which is three times of the control *** electroluminescence(EL)peaks of Maximum External Quantum Efficiency(MEQE)and Lmax of Sr-doped PeLEDs exhibite a slight shift,indicating the excellent stability and performance of Sr-doped *** optimized device can continuously operate for 360 s at MEQE driving voltage,resulting in a half-lifetime of60 s,which is 3-fold greater than that of the control PeLEDs.

关键词： Perovskite Light-Emitting Diodes(PeLED) Sr-doped brightness improved lifetime increased

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Implementation options of control systems for a cantilever calibration device 4

Implementation options of control systems for a cantilever c...

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4th International Conference on Control in Technical Systems, CTS 2021

作者： Cherkasova, Valeriya A. Froehlich, Thomas Institute of Process Measurement and Sensor Technology Technische Universität Ilmenau Ilmenau Germany

ISBN: (纸本)9781665424547

The article describes global approaches to control of the cantilever calibration device. The idea of the device consists in electromagnetic compensation of the influence of cantilever forces. The development of regulators is based on the simulation of mechanical processes when the cantilever is applied to the load cell with the principle of electromagnetic compensation;the identification of the processes is performed. In addition, in the course of the study, a comparison was made of PID controllers implemented on various actuator systems: an analog circuit, a current source, a dSPACE real-time system, a microcontroller. The purpose of developing and comparing regulators was to improve characteristics of the system: regulation time, overshoot, noise amplitude. © 2021 IEEE.

关键词： Calibration

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Acoustic Streaming in Solutions with Acousto-Responsive Particles Using Finite Elemen Analysis

Acoustic Streaming in Solutions with Acousto-Responsive Part...

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IEEE International Symposium on Applications of Ferroelectrics (ISAF)

作者： Sonja Wismath Atieh Razavi Matthias Rutsch Marius Finder Christoph Haugwitz Jan Helge Dörsam Nils Demuth Sören Soennecken Regine Von Klitzing Amin Rahimzadeh Mario Kupnik Measurement and Sensor Technology Group Technical University of Darmstadt Germany Institute for Condensed Matter Physics Technical University of Darmstadt Germany

ISBN: (数字)9798350371901

ISBN: (纸本)9798350371918

Microgels have the potential to be used as microscale transporters that release an active agent when excited externally. In recent work, poly(N-isopropylacrylamide) has been reported to be responsive to ultrasound through particle agglomeration, resulting in turbidity as a visual indicator of energy absorption. The evaluation of turbidity evolution for understanding sub-microscale processes is distorted by ultrasound-induced acoustic streaming (AS) as well as nonisothermal flow (NF) caused by the transducer’s heat loss. This work presents a 2D-axisymmetric numerical model of a transducer attached to a container filled with an aqueous solution as a liquid resonator operating at 2.38 MHz. The dominance of AS over the superposing NF is assessed with temperature and bulk viscosity as input quantities. Transducer characteristics are incorporated and validated using impedance matching. A streaming pattern of the microgel being actuated from previous work is reanalyzed as a validation method for the numerical model presented. The bulk viscosity of the solution is adapted according to validation data, and the resulting streaming pattern agrees with the measurements. The positions of the vortex centers show deviations of up to 0.5 mm and 0.3 mm in the x- and y-direction, respectively. Thus, evaluating the dominating effects within the solution depending on varying material properties or geometry is feasible.

关键词： Viscosity Visualization Ultrasonic imaging Transducers Temperature Turbidity Particle measurements Acoustics Numerical models Noise measurement

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Millimeter wave metamaterial for high-order orbital angular momentum generation 17

Millimeter wave metamaterial for high-order orbital angular ...

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17th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2023

作者： Schossmann, Alexander Tofferl, Michael Bergmann, Alexander Graz University of Technology Institute of Electrical Measurement and Sensor Systems Inffeldgasse33/I Graz8010 Austria Christian Doppler Laboratory for Structured Matter Based Sensing Inffeldgasse 33/I Graz8010 Austria

ISBN: (纸本)9798350332445

We propose a millimeter wave metamaterial for high-order OAM generation. The concept uses a reflecting metasurface irradiated by a small antenna (e.g., on-chip antenna) that emits linearly polarized millimeter waves at an operating frequency of 61 GHz. We present the numerical proof of principle using finite element simulations. Results show that OAM generation of the order of ten is feasible by varying one geometrical parameter of the metamaterial unit cell. Subsequent work is to further optimize the OAM generation by combining variations of multiple parameters to minimize the amplitude response variation and experimentally analyze the concept. © 2023 IEEE.

关键词： Metamaterials

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