@article{63731,
abstract = {{The Banzhaf power index can be used to quantify the explanatory power of single conditions in a configurational analysis that aims at identifying whether combinations of conditions are sufficient for an outcome. The latter method is an integral part of the Qualitative Comparative Analysis (QCA) approach. It is widely used in the literature, e.g., in the field of International Management. Haake and Schneider (2023) give a rigorous description of the connection between the empirical and game theoretic modeling. To justify that the Banzhaf index is an appropriate tool to measure the influence of a condition, this paper discusses a novel axiomatization of the Banzhaf index that uses axioms that are directly linked to the QCA methodology. As a side result, we demonstrate that in our model the Banzhaf index can be reinterpreted as an average of Shapley-Shubik indices.}},
author = {{Haake, Claus-Jochen and Schneider, Martin}},
journal = {{International Journal of Game Theory}},
keywords = {{Banzhaf index, axiomatization, QCA, explanatory power}},
publisher = {{Springer}},
title = {{{An Axiomatization of the Banzhaf Index to Measure Influence in Qualitative Comparative Analysis}}},
doi = {{10.1007/s00182-026-00978-2}},
volume = {{55}},
year = {{2026}},
}
@article{65066,
abstract = {{Abstract
We investigate whether the recently approved reforms of the apportionment of parliamentary seats to parties in the German Bundestag affects the parties’ political influence measured by power indices. We find that under neither reform the underlying simple game, which describes the possibilities to form governments, remains unchanged and as a result the Shapley-Shubik and the Banzhaf index are unaltered. As a consequence, the major change resulting from the reforms is the reduction of the Bundestag’s size to 630 seats.}},
author = {{Duman, Papatya and Haake, Claus-Jochen}},
issn = {{0948-5139}},
journal = {{Review of Economics}},
keywords = {{Bundestag reform, Banzhaf power index, Shapley-Shubik power index}},
number = {{3}},
pages = {{241--270}},
publisher = {{Walter de Gruyter GmbH}},
title = {{{A Note on the Size Reduction Reform in the German Parliament: A Game Theoretic Analysis of Power Indices}}},
doi = {{10.1515/roe-2024-0048}},
volume = {{76}},
year = {{2026}},
}
@inproceedings{64798,
abstract = {{Lead-containing piezoelectric ceramics are still the base for today’s ultrasonic transducers used in broad applications. This is partly due to missing powerful lead-free piezoelectric ceramic parts in the commercial market. There has been much research on lead-free materials but developing them into marketable parts seems to be an ongoing process. The actual exemption of ROHS has expired, but as the new exemption has already been requested, ceramic suppliers keep on selling lead containing products. Nevertheless, these should be replaced by lead-free alternatives for environmental and health issues.
This contribution focuses on exploring the technological readiness level of lead-free hard piezoceramics for prestressed ultrasonic transducers. A small series of bolted Langevin transducers was set up with standard PZT material and three commercial lead-free variants. Results of the building process from individual ring ceramic characteristics to transducer load tests are presented. The main finding of this study is that the lead-free materials technically can compete with the standard PZT for medium-power applications. Some adaptations in the ultrasonic system must be done: the geometry must be altered to fit resonance frequency, and higher voltages or thinner ceramics are needed to achieve the same vibration level at low load. For reaching same power, the volume of lead-free ceramics must be 1.5 to 3 times larger. As already promoted in literature, mechanical losses at high vibration levels are smaller for the lead-free materials. This might help to argument lead-free piezoelectric materials in some applications.
References
1. Directive 2011/65/EU of the European Parliament and of the Council of 8 June 2011 on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment. EUR-Lex Document 02011L0065-20240801. Available online: http://data.europa.eu/eli/dir/2011/65/2024-08-01 (accessed on 24 January 2025).
2. Langevin, P. (1918) Method and Apparatus for Transmitting and Receiving Submarine Elastic Waves Using the Piezoelectric Properties of Quartz. French Patent Office; Patent No. FR505703.
3. Hemsel, T.; Twiefel, J. (2023) Piezoelectric Ultrasonic Power Transducers. In Encyclopedia of Materials: Electronics; Academic Press: Oxford, UK; pp. 276–285. https://doi.org/10.1016/b978-0-12-819728-8.00047-4.
4. ATHENA Technologie Beratung GmbH (2025) Description of Ultrasound Generator. Available online: http://shop.myathena.de/epages/12074748.sf/de_DE/?ObjectPath=/Shops/12074748/Products/AM200 (accessed on 13 January 2025).
5. Littmann, W.; Hemsel, T.; Kauczor, C.; Wallaschek, J.; Sinha, W. (2003) Load-adaptive phase-controller for resonant driven piezoelectric devices. Proc. World Congr. Ultrason. 2003, 48, 547–550.
6. Scheidemann, C., Bornmann, P., Littmann, W., & Hemsel, T. (2025). Lead-Free Ceramics in Prestressed Ultrasonic Transducers. Actuators, 14(2), 55. https://doi.org/10.3390/act14020055
}},
author = {{Scheidemann, Claus and Bornmann, Peter and Littmann, Walter and Hemsel, Tobias}},
keywords = {{lead free piezoelectric ceramics, bolted Langevin transducer, medium power ultrasound.}},
location = {{Vilnius, Lithuania}},
title = {{{Bolted Langevin transducers with leadfree piezoelectric ceramics}}},
year = {{2025}},
}
@article{52686,
author = {{Ahmed, Qazi Arbab and Wiersema, Tobias and Platzner, Marco}},
issn = {{2509-3428}},
journal = {{Journal of Hardware and Systems Security}},
keywords = {{General Engineering, Energy Engineering and Power Technology}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Post-configuration Activation of Hardware Trojans in FPGAs}}},
doi = {{10.1007/s41635-024-00147-5}},
year = {{2024}},
}
@article{34114,
abstract = {{Qualitative comparative analysis (QCA) enables researchers in international management to better understand how the impact of a single explanatory factor depends on the context of other factors. But the analytical toolbox of QCA does not include a parameter for the explanatory power of a single explanatory factor or “condition”. In this paper, we therefore reinterpret the Banzhaf power index, originally developed in cooperative game theory, to establish a goodness-of-fit parameter in QCA. The relative Banzhaf index we suggest measures the explanatory power of one condition averaged across all sufficient combinations of conditions. The paper argues that the index is especially informative in three situations that are all salient in international management and call for a context-sensitive analysis of single conditions, namely substantial limited diversity in the data, the emergence of strong INUS conditions in the analysis, and theorizing with contingency factors. The paper derives the properties of the relative Banzhaf index in QCA, demonstrates how the index can be computed easily from a rudimentary truth table, and explores its insights by revisiting selected papers in international management that apply fuzzy-set QCA. It finally suggests a three-step procedure for utilizing the relative Banzhaf index when the causal structure involves both contingency effects and configurational causation.
}},
author = {{Haake, Claus-Jochen and Schneider, Martin}},
journal = {{Journal of International Management}},
keywords = {{Qualitative comparative analysis, Banzhaf power index, causality, explanatory power}},
number = {{2}},
publisher = {{Elsevier}},
title = {{{Playing games with QCA: Measuring the explanatory power of single conditions with the Banzhaf index}}},
volume = {{30}},
year = {{2024}},
}
@article{34802,
abstract = {{Purpose
Academic research has intensively analyzed the relationship between market concentration or market power and banking stability but provides ambiguous results, which are summarized under the concentration-stability/fragility view. We provide empirical evidence that the mixed results are due to the difficulty of identifying reliable variables to measure concentration and market power.
Design/methodology/approach
Using data from 3,943 banks operating in the European Union (EU)-15 between 2013 and 2020, we employ linear regression models on panel data. Banking market concentration is measured by the Herfindahl–Hirschman Index (HHI), and market power is estimated by the product-specific Lerner Indices for the loan and deposit market, respectively.
Findings
Our analysis reveals a significantly stability-decreasing impact of market concentration (HHI) and a significantly stability-increasing effect of market power (Lerner Indices). In addition, we provide evidence for a weak (or even absent) empirical relationship between the (non)structural measures, challenging the validity of the structure-conduct-performance (SCP) paradigm. Our baseline findings remain robust, especially when controlling for a likely reverse causality.
Originality/value
Our results suggest that the HHI may reflect other factors beyond market power that influence banking stability. Thus, banking supervisors and competition authorities should investigate market concentration and market power simultaneously while considering their joint impact on banking stability.}},
author = {{Herwald, Sarah and Voigt, Simone and Uhde, André}},
journal = {{Journal of Risk Finance}},
keywords = {{market concentration, market power, banking stability, European banking}},
number = {{3}},
pages = {{510 -- 536}},
title = {{{The conditional impact of market consolidation and market power on banking stability – Evidence from Europe}}},
doi = {{https://doi.org/10.1108/JRF-03-2023-0075}},
volume = {{25}},
year = {{2024}},
}
@article{53309,
author = {{Hölsch, Lukas and Brosch, Anian and Steckel, Richard and Braun, Tristan and Wendel, Sebastian and Böcker, Joachim and Wallscheid, Oliver}},
issn = {{0885-8969}},
journal = {{IEEE Transactions on Energy Conversion}},
keywords = {{Electrical and Electronic Engineering, Energy Engineering and Power Technology}},
pages = {{1--12}},
publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}},
title = {{{Insights and Challenges of Co-Simulation-Based Optimal Pulse Pattern Evaluation for Electric Drives}}},
doi = {{10.1109/tec.2024.3374962}},
year = {{2024}},
}
@article{45866,
author = {{Knorr, Lukas and Schlosser, Florian and Meschede, Henning}},
issn = {{1848-9257}},
journal = {{Journal of Sustainable Development of Energy, Water and Environment Systems}},
keywords = {{Energy Engineering and Power Technology, Water Science and Technology, Environmental Science (miscellaneous), Renewable Energy, Sustainability and the Environment}},
number = {{3}},
pages = {{0--0}},
publisher = {{SDEWES Centre}},
title = {{{Assessment of Energy Efficiency and Flexibility Measures in Electrified Process Heat Generation Based on Simulations in the Animal Feed Industry}}},
doi = {{10.13044/j.sdewes.d11.0444}},
volume = {{ 11}},
year = {{2023}},
}
@article{49565,
author = {{Ebersold, Felix and Hechelmann, Ron-Hendrik and Holzapfel, Peter and Meschede, Henning}},
issn = {{2590-1745}},
journal = {{Energy Conversion and Management: X}},
keywords = {{Energy Engineering and Power Technology, Fuel Technology, Nuclear Energy and Engineering, Renewable Energy, Sustainability and the Environment}},
publisher = {{Elsevier BV}},
title = {{{Carbon insetting as a measure to raise supply chain energy efficiency potentials: Opportunities and challenges}}},
doi = {{10.1016/j.ecmx.2023.100504}},
volume = {{20}},
year = {{2023}},
}
@article{52204,
author = {{Genovese, Matteo and Schlüter, Alexander and Scionti, Eugenio and Piraino, Francesco and Corigliano, Orlando and Fragiacomo, Petronilla}},
issn = {{0360-3199}},
journal = {{International Journal of Hydrogen Energy}},
keywords = {{Hydrogen economy, Green hydrogen, Power-to-X, Hydrogen-to-X, Sector coupling}},
number = {{44}},
pages = {{16545--16568}},
publisher = {{Elsevier BV}},
title = {{{Power-to-hydrogen and hydrogen-to-X energy systems for the industry of the future in Europe}}},
doi = {{10.1016/j.ijhydene.2023.01.194}},
volume = {{48}},
year = {{2023}},
}
@article{53074,
author = {{Kasper, Tina and Hansen, Nils}},
issn = {{0010-2180}},
journal = {{Combustion and Flame}},
keywords = {{General Physics and Astronomy, Energy Engineering and Power Technology, Fuel Technology, General Chemical Engineering, General Chemistry}},
publisher = {{Elsevier BV}},
title = {{{Resonance enhanced multiphoton ionization detection of aromatics formation in fuel-rich flames}}},
doi = {{10.1016/j.combustflame.2023.112820}},
volume = {{257}},
year = {{2023}},
}
@article{45867,
author = {{Schlosser, Florian and Zysk, Sebastian and Walmsley, Timothy G. and Kong, Lana and Zühlsdorf, Benjamin and Meschede, Henning}},
issn = {{0196-8904}},
journal = {{Energy Conversion and Management}},
keywords = {{Energy Engineering and Power Technology, Fuel Technology, Nuclear Energy and Engineering, Renewable Energy, Sustainability and the Environment}},
publisher = {{Elsevier BV}},
title = {{{Break-even of high-temperature heat pump integration for milk spray drying}}},
doi = {{10.1016/j.enconman.2023.117304}},
volume = {{291}},
year = {{2023}},
}
@article{45931,
abstract = {{This paper aims to present an approach for the planning of carbon low heat supply in a future district heating system based on open data for German cities with existing district heating networks. One focus is on the integration of industrial waste heat and the uncertainty of future waste heat sources as well as restrictions on the use of biomass. For that purpose, knowledge about the energy demand is necessary. In a first step it is shown how the demand around a heating network is estimated with spatial data and a load profile is generated. Local available heat sources are examined according to their suitability and their kind of integration in the heating network. As heat production from different units are optimised, the development of a simulation model will be presented. The simulation is based on the optimisation of the operational costs of the used technologies for heating supply. Different scenarios covering various technologies and economic assumptions are applied. The results show the levelized costs of heating as well as the ecological performance. A sensitivity analysis shows the importance of uncertainties for the economic assumptions. The results showing levelized costs of heating as well as the ecological performance underlining the advantage of excess heat integration.}},
author = {{Divkovic, Denis and Knorr, Lukas and Meschede, Henning}},
issn = {{2246-2929}},
journal = {{International Journal of Sustainable Energy Planning and Management}},
keywords = {{Energy Engineering and Power Technology, Renewable Energy, Sustainability and the Environment, Geography, Planning and Development}},
pages = {{141--156}},
publisher = {{Aalborg University}},
title = {{{Design approach to extend and decarbonise existing district heating systems - case study for German cities}}},
doi = {{10.54337/ijsepm.7655}},
volume = {{38}},
year = {{2023}},
}
@article{46486,
author = {{Pfeifer, Florian and Knorr, Lukas and Schlosser, Florian and Marten, Thorsten and Tröster, Thomas}},
issn = {{1848-9257}},
journal = {{Journal of Sustainable Development of Energy, Water and Environment Systems}},
keywords = {{Energy Engineering and Power Technology, Water Science and Technology, Environmental Science (miscellaneous), Renewable Energy, Sustainability and the Environment}},
number = {{3}},
pages = {{1--20}},
publisher = {{SDEWES Centre}},
title = {{{Ecological and Economic Feasibility of Inductive Heating for Sustainable Press Hardening Processes}}},
doi = {{10.13044/j.sdewes.d11.0450}},
volume = {{11}},
year = {{2023}},
}
@misc{50233,
author = {{Robaszkiewicz, Maria Anna}},
booktitle = {{Arendt Studies}},
issn = {{2574-2329}},
keywords = {{Energy Engineering and Power Technology, Fuel Technology}},
pages = {{247--252}},
publisher = {{Philosophy Documentation Center}},
title = {{{Life, Theory, and Group Identity in Hannah Arendt's Thought, by Karen Fry}}},
doi = {{10.5840/arendtstudies2023756}},
volume = {{7}},
year = {{2023}},
}
@techreport{32106,
abstract = {{We study the consequences of modeling asymmetric bargaining power in two-person bargaining problems. Comparing application of an asymmetric version of a bargaining solution to an upfront modification of the disagreement point, the resulting distortion crucially depends on the bargaining solution concept. While for the Kalai-Smorodinsky solution weaker players benefit from modifying the disagreement point, the situation is reversed for the Nash bargaining solution. There, weaker players are better off in the asymmetric bargaining solution. When comparing application of the asymmetric versions of the Nash and the Kalai-Smorodinsky solutions, we demonstrate that there is an upper bound for the weight of a player, so that she is better off with the Nash bargaining solution. This threshold is ultimately determined by the relative utilitarian bargaining solution. From a mechanism design perspective, our results provide valuable information for a social planner, when implementing a bargaining solution for unequally powerful players.}},
author = {{Haake, Claus-Jochen and Streck, Thomas}},
keywords = {{Asymmetric bargaining power, Nash bargaining solution, Kalai-Smorodinsky bargaining solution}},
pages = {{17}},
title = {{{Distortion through modeling asymmetric bargaining power}}},
volume = {{148}},
year = {{2022}},
}
@article{32764,
author = {{Kasse, Robert M. and Geise, Natalie R. and Sebti, Elias and Lim, Kipil and Takacs, Christopher J. and Cao, Chuntian and Steinrück, Hans-Georg and Toney, Michael F.}},
issn = {{2574-0962}},
journal = {{ACS Applied Energy Materials}},
keywords = {{Electrical and Electronic Engineering, Materials Chemistry, Electrochemistry, Energy Engineering and Power Technology, Chemical Engineering (miscellaneous)}},
number = {{7}},
pages = {{8273--8281}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Combined Effects of Uniform Applied Pressure and Electrolyte Additives in Lithium-Metal Batteries}}},
doi = {{10.1021/acsaem.2c00806}},
volume = {{5}},
year = {{2022}},
}
@article{47558,
author = {{Röder, Lilli Sophia and Gröngröft, Arne and Grünewald, Marcus and Riese, Julia}},
issn = {{0363-907X}},
journal = {{International Journal of Energy Research}},
keywords = {{Energy Engineering and Power Technology, Fuel Technology, Nuclear Energy and Engineering, Renewable Energy, Sustainability and the Environment}},
number = {{13}},
pages = {{17733--17754}},
publisher = {{Hindawi Limited}},
title = {{{Options for demand side management in biofuel production: A systematic review}}},
doi = {{10.1002/er.8353}},
volume = {{46}},
year = {{2022}},
}
@article{47559,
author = {{Röder, Lilli Sophia and Gröngröft, Arne and Grünewald, Marcus and Riese, Julia}},
issn = {{0363-907X}},
journal = {{International Journal of Energy Research}},
keywords = {{Energy Engineering and Power Technology, Fuel Technology, Nuclear Energy and Engineering, Renewable Energy, Sustainability and the Environment}},
number = {{13}},
pages = {{17733--17754}},
publisher = {{Hindawi Limited}},
title = {{{Options for demand side management in biofuel production: A systematic review}}},
doi = {{10.1002/er.8353}},
volume = {{46}},
year = {{2022}},
}
@article{40644,
author = {{Al-Lami, Abbas Jarullah Sangoor and Kenig, Eugeny Y. and Inguva, Venkatesh}},
issn = {{1359-4311}},
journal = {{Applied Thermal Engineering}},
keywords = {{Industrial and Manufacturing Engineering, Energy Engineering and Power Technology}},
publisher = {{Elsevier BV}},
title = {{{Numerical analysis of conjugate heat transfer within internally channeled tubes}}},
doi = {{10.1016/j.applthermaleng.2022.119596}},
volume = {{223}},
year = {{2022}},
}