TY - CHAP A1 - Peters, Isabell T1 - Responsible implementation of AI in Government: A Systematic Review of Governance and Organizational Structures T2 - Proceedings of the 59th Hawaii International Conference on System Sciences N2 - Responsible Artificial Intelligence (RAI) has emerged as a central concept to guide the development and use of artificial intelligence in government, yet its institutional implementation remains insufficiently understood. This study conducts a systematic literature review of 24 peer-reviewed articles to synthesize how organizational and governance structures enable or hinder the responsible implementation of AI in government. The findings reveal that while transparency, accountability, and legality are widely invoked as guiding principles, their realization depends on institutional capacity, organizational commitment, and the presence of formal governance mechanisms. The study contributes by consolidating fragmented evidence on RAI in government into a structured synthesis of organizational and governance determinants. Beyond mapping existing studies, it develops a conceptual framing that highlights how normative principles, organizational capacities, and governance mechanisms interact to shape implementation, and reveals the symbolic orientation of many current governance practices as a key challenge for moving toward actionable accountability. KW - AI in government KW - artificial intelligence implementation KW - institutional theory KW - multi-level governance KW - public sector KW - responsible artifical intelligence Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21572 UR - https://hdl.handle.net/10125/111643 SP - 2043 EP - 2052 PB - University of Hawai'i at Manoa, Hamilton Library ER - TY - CHAP A1 - Mallareddy, Tarun Teja A1 - Alarcón, Daniel A1 - Schneider, Sarah A1 - Blaschke, Peter T1 - The Influence of Geometrical Correlation in Modal Validation Using Automated 3D Metrology T2 - Rotating Machinery, Vibro-Acoustics & Laser Vibrometry, Volume 7 : Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018 N2 - Structural analysis is a major part of all manufacturing and testing industries. The need for high level accuracy of the results in the testing field has increased progressively, resulting in development of advanced state of art techniques. In order to acquire the vibrational characteristics of a structure, a detailed Finite Element Analysis (FEA) modelling is performed. Also, Experimental Modal Analysis (EMA) is conducted to extract the dynamic characteristics of a structure. The results obtained from both the processes are correlated for validation purposes. Based on the correlation (good or bad) the structural analysis is validated. In most cases the correlation is not satisfactory; it is mainly because of the boundary conditions that differ in FE and EMA. This research study explains in detail how important the boundary conditions are for modal validation. But the most imperative part, as the first step of correlation, is the geometry analysis. If the geometrical correlation is not accurate, the later part of correlation will turn out to be an assumption based on inaccuracies. Assumption of a geometrical correlation, without being sure of the differences, will lead to inaccurate results for validation. A reference plate is tested and simulated by using EMA and FEA techniques respectively. EMA is conducted by using a 3D SLDV for measuring the output response and the input force of excitation is induced by a Scalable Automatic Modal hammer (SAM). This plate is then scanned using ATOS Triple Scan II GOM 3D geometry scanner. The scanned results are compared with the FE model of the reference plate. The results presented show the importance of geometrical correlation for modal validation and provide results of deviations that were observed on a reference plate. With these conclusions, working on modal validation can be developed by reducing the inaccuracies for the presentation of correlation. KW - experimental modal analysis KW - impact modal testing KW - validation KW - geometrical correlation KW - 3D geometry scanner KW - FE KW - non-mass loaded impact Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21524 PB - River Publishers ER - TY - CHAP A1 - Alarcón, Daniel A1 - Schneider, Sarah A1 - Kamenzky, Robert A1 - Blaschke, Peter T1 - Across the Picket Fence: Influence of Sampling Frequency in Automatic Impact Modal Testing T2 - Special Topics in Structural Dynamics, Volume 5 : Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018 N2 - Automatic impact modal testing is a technique gaining momentum in recent years thanks to the popularization of Scanning Laser Doppler Vibrometry. These systems allow automatizing the output measurement of thousands of degrees of freedom in a short time. The use of automatic impact modal hammers allows automatizing the excitation input and broadband excitation without loading a structure with an extra mass or other drawbacks. However, the impact force repeatability is a prominent concern among test engineers, especially those who work with materials with non-proportional force/response ratios. Assessing the impact force repeatability of a given automatic modal hammer or test rig is necessary in order to ensure the right response level is measured impact after impact. The assessment procedure can be misleading if not done right. Studying the automatic modal hammer repeatability under typical modal test conditions invariably leads to impact signals strongly distorted by the so called picket fence effect. This results in impacts sampled by only 3–4 data points; insufficient to accurately describe the actual impact force signals and the short contact times between hammer tip and structure. In the reality, the impacts are of larger magnitudes and shorter contact times than what is shown by the analyzer in typical test conditions. This work studies the influence of the sampling frequency and the test structures used on the repeatability assessment of automatic impact modal hammers. Impact force signals are acquired in this work with enough resolution to eliminate the picket fence effect and truly evaluate how repeatable and reproducible automatic impacts are. The practicality of the procedure, which involves very large datasets and long testing times, is discussed. Guidelines are offered at the end of the paper for a successful repeatability and reproducibility assessment of automatic impact modal hammers. KW - experimental modal analysis KW - sampling KW - automatic modal hammer KW - impact modal testing KW - validation Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21515 PB - River Publishers ER - TY - CHAP A1 - Schneider, Sarah A1 - Mallareddy, Tarun Teja A1 - Alarcón, Daniel A1 - Kamenzky, Robert A1 - Blaschke, Peter T1 - Experimental Modal Analysis of Structures with Conventional Versus Contact-Free Suspension T2 - Special Topics in Structural Dynamics, Volume 5 : Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018 N2 - The existence of free boundary conditions is frequently assumed for Experimental Modal Analysis (EMA) of a structure. However, free-free conditions can only be approximated because the structure must be supported in some manner. Therefore, comparing simulated data with experimental data can be deceiving, because these suspensions falsify modal parameters especially structural damping and stiffness. The current scenario of structural analysis is more towards focusing on modal updating or correlation, rather than the simulation results (FE) or the experimental results. So it is imperative to bridge the gap between FE and EMA, by carefully studying various parameters. To overcome these drawbacks, levitation is suggested as a truly free-free suspension method. The levitation method was developed to allow a non-destructive, adaptable, and completely contactless approach for material testing: the structure under test is suspended on a thin film of pressurized air providing an aerodynamic bearing, levitating the specimen. Two suspension devices were constructed. Pressurized air is circulated into a casing with a single outlet (“air cushion”) or a fine grid of outlets (“air bed”). A study was performed to investigate the influence of the support conditions on the modal parameters eigenfrequency and damping. Tested specimens were a brass plate, a stainless steel plate and two composite material probes. The tested suspension methods were (a) foam mat, (b) air cushion and (c) air bed. Modal tests were performed using a Scanning Laser Doppler Vibrometer (SLDV) and an automatic modal hammer for excitation. Evaluations of the measurements were performed manually. The results showed that the detected eigenfrequencies of the metallic specimen have a variation below ±0.3% for the tested suspension methods. This variation is 10 times higher for the composite plates and lies between ±3%. The damping ratios of the levitation suspensions show the different material behavior of metallic and composite specimen: damping ratios of metallic specimen lie between 0.05–0.5% whereas damping ratios of composite plates are ten times higher and lie between 0.3% and 3%. The damping ratios measured with the air cushion are smaller than the damping ratios for the air bed supporting the hypothesis that a laminar air film under the specimen leads to less additional damping. The study shows that EMA can be performed on metallic and composite specimens using contact-less suspension methods. Especially for light-weight material specimens where EMA cannot be performed or where the results are not reliable, the contact-less suspension (levitation method) can be used. KW - modal analysis KW - levitation KW - free-free suspension KW - composite material KW - automatic modal hammer Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21533 PB - River Publishers ER - TY - CHAP A1 - Mallareddy, Tarun Teja A1 - Schneider, Sarah A1 - Blaschke, Peter T1 - Advanced Hammer Excitation Technique for Impact Modal Testing on Lightweight Materials Using Scalable Automatic Modal Hammer T2 - Topics in Modal Analysis & Testing, Volume 9 : Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018 N2 - Experimental Modal Analysis (EMA) on a lightweight material has proven to be very challenging in the recent past. The applications of these materials have increased invariably in various fields and so have a high demand for Research & Development (R&D). A lightweight material is very sensitive in terms of vibration. EMA on these materials in free - free boundary condition is very complicated as the hammer excitation becomes very difficult. In order to acquire valid results, the conditions are modified, and in consequence, obtain inaccurate dynamic characteristics. Some of the major challenges faced are: (a) material getting displaced from its original position after every hit, (b) difficulties in obtaining a single hit, (c) reproducing the same excitation force level for averaging output response. Overcoming these crucial challenges can result in reducing the inaccuracies in the results. Scalable Automatic Modal hammer (SAM) is developed to overcome these challenges and enables the ability to reproduce the same force level of excitation. This advanced hammer excitation technique has the capability to avoid the double hit, adjust the repeatability of force level and automatizes the entire excitation process. In this research paper, a light weight material is experimented under free-free boundary condition and the obtained results are analyzed. The input hammer excitation is provided by SAM and the output contactless response is measured by Scanning Laser Doppler Vibrometer (SLDV). The conclusions provided will reflect the importance of repeatability and reproducibility of hammer excitation force level in order to acquire accurate results. The controlling of SAM, by changing various parameters, in order to precisely excite lightweight structures will be demonstrated. KW - experimental modal analysis KW - impact modal testing KW - lightweight material testing KW - non-mass-loaded impact KW - validation Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21508 PB - River Publishers ER - TY - CHAP A1 - Hauschultz, Mike Thomas A1 - Friedo, Maria Helene A1 - Döhler, Torsten A1 - Böhme, Andrea A1 - Richetta, Maria A1 - Krenz-Baath, René T1 - Layer-by-Layer Process Control in Selective Laser Melting via Customized G-Code Handling T2 - Tagungsband AALE 2026: Mechatronische Systeme für die Automatisierung: Fortschritt durch Präzision und Qualität N2 - Selective Laser Melting (SLM), also commonly referred to as laser powder bed fusion (LPBF), has become a widely adopted technology in metal additive manufacturing for both industrial and research applications. However, many commercial LPBF systems are based on closed hardware and software architectures, which limit transparency, process monitoring, and direct parameter manipulation during ongoing builds. While recent industrial machines increasingly provide standardized interfaces such as OPC UA for monitoring purposes, fine-grained, layer-wise process control remains restricted. The One Click Metal MPrint+ exemplifies this paradigm by relying on proprietary container-based job execution prepared using commercial software tools such as Autodesk Netfabb or Autodesk Fusion 360. This contribution presents an alternative approach that enables user-defined control of the MPrint+ system through a custom-developed G-code handling framework. Instead of executing complete print jobs as opaque containers, the proposed method establishes a direct network connection to the printer using its gRPC interface. Externally generated G-code is extracted, processed, and transmitted layer-wise to the machine, enabling direct interaction with the build process beyond standard job execution. The approach allows controlled variation of process parameters such as exposure strategies, hatch patterns, or recoating behavior during an ongoing build, thereby supporting efficient design-ofexperiment studies without requiring multiple independent print jobs. In addition, individual G-code commands can be executed interactively, enabling didactic use cases in which machine behavior can be directly observed and linked to abstract toolpath descriptions. KW - selective laser melting KW - G-code handling KW - print control Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21449 SP - 309 EP - 317 PB - Hochschule für Technik, Wirtschaft und Kultur Leipzig ER - TY - CHAP A1 - Friedo, Maria Helene A1 - Hauschultz, Mike Thomas A1 - Döhler, Torsten A1 - Erhardt, Tom A1 - Jacobs, Hannes A1 - Richetta, Maria A1 - Böhme, Andrea A1 - Krenz-Baath, René T1 - Development of Intelligent Process Automation Strategies to Enhance Selective Laser Melting Performance and Resource Efficiency T2 - Tagungsband AALE 2026: Mechatronische Systeme für die Automatisierung: Fortschritt durch Präzision und Qualität N2 - The research project FASER advances additive manufacturing processes for metallic materials, focusing on Selective Laser Melting (SLM). FASER stands for “Fehlerfreies Additives Fertigen durch adaptive Sensorik zur Optimierung der Energie- und Ressourceneffizienz”. Conducted at the Technical University of Applied Sciences Wildau, it implements a comprehensive zero-defect strategy using market-standard equipment like the One Click Metal MPrint+ SLM machine and MPure powder removal station. These systems are enhanced with adaptive multi-sensor technology and intelligent process control to boost quality, cut energy use, and minimize material waste. Central to FASER is flexible camera-based multi-sensor integration, combining optical, thermographic, and spectroscopic methods for real-time monitoring in harsh SLM environments. KW - additive manufacturing KW - adaptive sensor technology KW - selective laser melting KW - process monitoring KW - resource efficiency Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21430 SP - 299 EP - 307 PB - Hochschule für Technik, Wirtschaft und Kultur Leipzig ER - TY - JOUR A1 - Ševaev, Dmitrij A1 - Nomerotski, Andrei A1 - Švihra, Peter A1 - Sishodia, Keshav A1 - Roos, Andreas Hult A1 - Albrecht, Martin A1 - Krishnan, Sivarama A1 - Andreasson, Jakob A1 - Krikunova, Maria A1 - Klimešová, Eva T1 - Studies of ultrafast dynamics in substrate-free nanoparticles at ELI using Timepix3 optical camera JF - Journal of Instrumentation N2 - We present a novel application of the Timepix3 optical camera (Tpx3Cam) for investigating ultrafast dynamics in substrate-free nanoparticles at the Extreme Light Infrastructure European Research Infrastructure Consortium (ELI ERIC). The camera, integrated into an ion imaging system based on a micro-channel plate (MCP) and a fast P47 scintillator with nanosecond scale response time, enables individual time-stamping of incoming ions with nanosecond timing precision and high spatial resolution. The detector successfully captured laser-induced ion events originating from free nanoparticles disintegrated by intense laser pulses. Owing to the broad size distribution of the nanoparticles (10–500 nm) and the variation in laser intensities within the interaction volume, the detected events range in occupancy from near-zero to extremely high, approaching the readout limits of the detector. By combining time-of-flight and velocity map imaging (VMI) techniques, detailed post-processing and analysis were performed. The results presented here focus on the performance of Tpx3Cam under high-occupancy conditions, which are of particular relevance to this study. These conditions approach the limitations imposed by the camera’s readout capabilities and challenge the effectiveness of standard post-processing algorithms. We investigated these limitations and associated trade-offs, and we present improved methods and algorithms designed to extract the most informative features from the data. KW - analysis and statistical method KW - data acquisition concept KW - instrumentation and method for time-of-flight (TOF) spectroscopy KW - optical detector readout concept Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21469 VL - 21 IS - 03 PB - Institute of Physics Publishing (IOP) ER - TY - CHAP A1 - Stoldt, Johannes A1 - Prell, Bastian A1 - Rabe, Markus A1 - Wenzel, Sigrid A1 - Thiede, Sebastian T1 - A Criteria-based Database for Research and Applications of Energy-oriented Simulation in Production and Logistics T2 - Simulation in Produktion und Logistik 2021 N2 - Within the Section “Simulation in Production and Logistics” of the association for simulation in the German-speaking area (ASIM), the relevance of energy-related considerations led to the foundation of a dedicated scientific workgroup. One of their primary results is a comprehensive literature overview of related approaches from research and industrial perspectives. The experts cooperated to identify, evaluate, and classify relevant literature. Interim findings have been published with special emphasis on logistics and manufacturing. Recently, work was focused on converting the findings into a structured database, to foster the involvement of other experts by providing consistent access to all results in the public domain and to provide means to submit new contributions proactively to the group. Thus, the workgroup intends to raise awareness and motivate other researchers to join the effort. This paper summarises the rationale and methodology of the activities as well as the provision as a public database. Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21356 UR - https://cuvillier.de/de/shop/publications/8509-simulation-in-produktion-und-logistik-2021 SP - 93 EP - 102 PB - Cuvillier Verlag ER - TY - JOUR A1 - Zesch, Christoph A1 - Finkelstein, Daniel A1 - Regehly, Martin A1 - Reif, Jürgen A1 - Schrader, Sigurd T1 - Efficient nanosecond barium nitrate Raman laser for the visible spectral range JF - Optics Express N2 - We report on the design and performance of two solid-state Raman lasers, pumped by a frequency-doubled Nd:YAG laser at 532 nm (8 ns FWHM, 10 Hz, up to 10 mJ), that generate either the first or second Stokes radiation with wavelengths of 563 nm and 598 nm. Barium nitrate crystals with a 1 cm² face area and lengths of 3 cm and 5 cm were used as the Raman-active medium in stable semi-spherical resonators. The Raman lasers produced first Stokes and second Stokes pulses, achieving pulse energies up to 2.3 mJ and conversion efficiencies up to 35% (first Stokes, 5 cm crystal) and 21% (second Stokes, 5 cm crystal). The output beams exhibit nearly Gaussian profiles with beam quality factors of M² = 1.67 and M² = 1.83, respectively. The proposed design and characterization demonstrated a Raman laser with high efficiency and superior beam quality. After subsequent frequency doubling, the output appears well dedicated for future differential absorption LiDAR (DIAL) applications. KW - Gaussian beam KW - laser source KW - Nd:YAG laser KW - Raman laser KW - solid state laser KW - ultraviolet laser Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21320 VL - 34 IS - 4 SP - 6355 EP - 6363 PB - Optica ER - TY - CHAP A1 - Dominguez Lacasa, Iciar A1 - Mietzner, Dana T1 - How to Engage with Local Communities for Regional Development in Rural Areas? Participatory Formats in Outreach Hubs T2 - Collaborative Workspaces Beyond the Urban: Economy, Community and Regional Development N2 - In transformation and economic development processes, universities have a responsible role alongside research and teaching in the context of their “third mission.” This concept has expanded to focus more on social engagement, social innovation, and the involvement of civil society as a key driver of research and transfer. New approaches and instruments are needed to address this challenge. Collaborative workspaces (CWS) are suitable for implementing participatory formats with civil society due to their open design and corresponding formats. This study examines how participatory formats can be implemented in a university-based outreach hub—a type of CWS—in a rural area and how civil society involvement can be facilitated. Four different participatory formats implemented in the outreach hub are presented: open lab days in the makerspace, citizens’ perspective on their town, citizen science, and participatory scenario analyses. The study discusses the special role of the outreach hub, which allows universities to engage directly with local communities and address their needs. The outreach hub acts as a crystallization point, shaping new relationships and forms of cooperation. KW - civil society KW - outreach hub KW - participatory format KW - rural area KW - science cube KW - third mission Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21306 SP - 275 EP - 299 PB - Springer Nature Singapore ER - TY - JOUR A1 - Tannenberg, Robert A1 - Tscheuschner, Georg A1 - Raab, Christopher A1 - Flemig, Sabine A1 - Döring, Sarah A1 - Ponader, Marco A1 - Thurmann, Melinda A1 - Paul, Martin A1 - Weller, Michael G. T1 - Simplified Sample Preparation and Lateral Flow Immunoassay for the Detection of Plant Viruses JF - Biosensors N2 - Lateral flow immunoassays (LFAs) are widely used for on-site testing; however, their use for the rapid detection of plant viruses in the field is often limited by inconvenient sample preparation. Here, we present a new sampling method and a simplified dipstick LFA format for the detection and monitoring of cowpea chlorotic mottle virus (CCMV) as a model plant pathogen. The assay employs a monoclonal mouse antibody for capture and a poly-clonal rabbit antibody conjugated to 80 nm gold nanoparticles for detection. Conventional sample and conjugate pads are omitted, allowing the test strips to be dipped directly into wells containing plant extract and antibody–gold conjugate. No plastic casing was required, which could lead to a reduction in waste. It was shown that CCMV concentrations as low as 3.5 μg/L or 350 pg per sample could be reliably detected in 15 min. Specificity tests confirmed that other plant viruses, cowpea mosaic virus (CPMV) and tobacco mosaic virus (TMV), did not produce false-positive results. In addition, we describe a new method for on-site sampling using a manual punch and a syringe equipped with a frit. This step combines grinding the sample, extraction, filtration, and reconstitution and mixing of the antibody-gold conjugate, enabling the analysis of punched leaf disks without laboratory equipment. When applied to CCMV-infected cowpea plants, the assay revealed systemic infection before visual symptoms became apparent. This work demonstrates that simplified LFAs combined with innovative sampling techniques can provide sensitive, specific, and rapid diagnostics for crop monitoring and support early intervention strategies in agriculture. KW - LFA format KW - Vigna unguiculata KW - cowpea chlorotic mottle virus KW - crop monitoring KW - lateral flow immunoassay KW - plant virus KW - sample preparation KW - waste reduction Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-21294 VL - 16 IS - 2 PB - MDPI ER -