[{"abstract":[{"text":"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. \r\nThis 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.\r\n\r\nReferences\r\n1.\tDirective 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).\r\n2.\tLangevin, P. (1918) Method and Apparatus for Transmitting and Receiving Submarine Elastic Waves Using the Piezoelectric Properties of Quartz. French Patent Office; Patent No. FR505703.\r\n3.\tHemsel, 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.\r\n4.\tATHENA 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).\r\n5.\tLittmann, 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.\r\n6.\tScheidemann, 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\r\n","lang":"eng"}],"file":[{"relation":"main_file","content_type":"application/pdf","file_name":"IWPMA_2025_Hemsel.pdf","file_id":"64799","access_level":"open_access","file_size":1812289,"creator":"hemsel","date_created":"2026-03-02T10:37:46Z","date_updated":"2026-03-02T11:00:37Z"}],"status":"public","type":"conference","ddc":["620"],"keyword":["lead free piezoelectric ceramics","bolted Langevin transducer","medium power ultrasound."],"file_date_updated":"2026-03-02T11:00:37Z","language":[{"iso":"eng"}],"_id":"64798","user_id":"210","department":[{"_id":"151"}],"year":"2025","citation":{"short":"C. Scheidemann, P. Bornmann, W. Littmann, T. Hemsel, in: 2025.","bibtex":"@inproceedings{Scheidemann_Bornmann_Littmann_Hemsel_2025, title={Bolted Langevin transducers with leadfree piezoelectric ceramics}, author={Scheidemann, Claus and Bornmann, Peter and Littmann, Walter and Hemsel, Tobias}, year={2025} }","mla":"Scheidemann, Claus, et al. <i>Bolted Langevin Transducers with Leadfree Piezoelectric Ceramics</i>. 2025.","apa":"Scheidemann, C., Bornmann, P., Littmann, W., &#38; Hemsel, T. (2025). <i>Bolted Langevin transducers with leadfree piezoelectric ceramics</i>. International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania.","ama":"Scheidemann C, Bornmann P, Littmann W, Hemsel T. Bolted Langevin transducers with leadfree piezoelectric ceramics. In: ; 2025.","ieee":"C. Scheidemann, P. Bornmann, W. Littmann, and T. Hemsel, “Bolted Langevin transducers with leadfree piezoelectric ceramics,” presented at the International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania, 2025.","chicago":"Scheidemann, Claus, Peter Bornmann, Walter Littmann, and Tobias Hemsel. “Bolted Langevin Transducers with Leadfree Piezoelectric Ceramics,” 2025."},"has_accepted_license":"1","title":"Bolted Langevin transducers with leadfree piezoelectric ceramics","conference":{"end_date":"2025-07-03","location":"Vilnius, Lithuania","name":"International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA)","start_date":"2025-07-01"},"oa":"1","date_updated":"2026-03-02T11:04:56Z","date_created":"2026-03-02T10:39:40Z","author":[{"first_name":"Claus","full_name":"Scheidemann, Claus","id":"38259","last_name":"Scheidemann"},{"last_name":"Bornmann","full_name":"Bornmann, Peter","first_name":"Peter"},{"last_name":"Littmann","full_name":"Littmann, Walter","first_name":"Walter"},{"first_name":"Tobias","last_name":"Hemsel","id":"210","full_name":"Hemsel, Tobias"}]},{"title":"Forward-Biased Silicon Phase Shifter Modeling for Electronic-Photonic Co-Simulation and Validation in a 250 nm EPIC BiCMOS Technology","doi":"10.1109/JLT.2024.3450949","date_updated":"2025-11-27T07:16:01Z","date_created":"2025-11-27T07:14:34Z","author":[{"first_name":"Tobias","last_name":"Schwabe","id":"39217","full_name":"Schwabe, Tobias"},{"id":"13256","full_name":"Kress, Christian","orcid":"0000-0002-4403-2237","last_name":"Kress","first_name":"Christian"},{"last_name":"Kruse","full_name":"Kruse, Stephan","id":"38254","first_name":"Stephan"},{"orcid":"0000-0003-2699-9839","last_name":"Weizel","id":"44271","full_name":"Weizel, Maxim","first_name":"Maxim"},{"first_name":"Hanjo","last_name":"Rhee","full_name":"Rhee, Hanjo"},{"first_name":"J. Christoph","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt","full_name":"Scheytt, J. Christoph","id":"37144"}],"volume":43,"year":"2025","citation":{"ama":"Schwabe T, Kress C, Kruse S, Weizel M, Rhee H, Scheytt JC. Forward-Biased Silicon Phase Shifter Modeling for Electronic-Photonic Co-Simulation and Validation in a 250 nm EPIC BiCMOS Technology. <i>Journal of Lightwave Technology</i>. 2025;43(1):255-270. doi:<a href=\"https://doi.org/10.1109/JLT.2024.3450949\">10.1109/JLT.2024.3450949</a>","chicago":"Schwabe, Tobias, Christian Kress, Stephan Kruse, Maxim Weizel, Hanjo Rhee, and J. Christoph Scheytt. “Forward-Biased Silicon Phase Shifter Modeling for Electronic-Photonic Co-Simulation and Validation in a 250 Nm EPIC BiCMOS Technology.” <i>Journal of Lightwave Technology</i> 43, no. 1 (2025): 255–70. <a href=\"https://doi.org/10.1109/JLT.2024.3450949\">https://doi.org/10.1109/JLT.2024.3450949</a>.","ieee":"T. Schwabe, C. Kress, S. Kruse, M. Weizel, H. Rhee, and J. C. Scheytt, “Forward-Biased Silicon Phase Shifter Modeling for Electronic-Photonic Co-Simulation and Validation in a 250 nm EPIC BiCMOS Technology,” <i>Journal of Lightwave Technology</i>, vol. 43, no. 1, pp. 255–270, 2025, doi: <a href=\"https://doi.org/10.1109/JLT.2024.3450949\">10.1109/JLT.2024.3450949</a>.","mla":"Schwabe, Tobias, et al. “Forward-Biased Silicon Phase Shifter Modeling for Electronic-Photonic Co-Simulation and Validation in a 250 Nm EPIC BiCMOS Technology.” <i>Journal of Lightwave Technology</i>, vol. 43, no. 1, 2025, pp. 255–70, doi:<a href=\"https://doi.org/10.1109/JLT.2024.3450949\">10.1109/JLT.2024.3450949</a>.","bibtex":"@article{Schwabe_Kress_Kruse_Weizel_Rhee_Scheytt_2025, title={Forward-Biased Silicon Phase Shifter Modeling for Electronic-Photonic Co-Simulation and Validation in a 250 nm EPIC BiCMOS Technology}, volume={43}, DOI={<a href=\"https://doi.org/10.1109/JLT.2024.3450949\">10.1109/JLT.2024.3450949</a>}, number={1}, journal={Journal of Lightwave Technology}, author={Schwabe, Tobias and Kress, Christian and Kruse, Stephan and Weizel, Maxim and Rhee, Hanjo and Scheytt, J. Christoph}, year={2025}, pages={255–270} }","short":"T. Schwabe, C. Kress, S. Kruse, M. Weizel, H. Rhee, J.C. Scheytt, Journal of Lightwave Technology 43 (2025) 255–270.","apa":"Schwabe, T., Kress, C., Kruse, S., Weizel, M., Rhee, H., &#38; Scheytt, J. C. (2025). Forward-Biased Silicon Phase Shifter Modeling for Electronic-Photonic Co-Simulation and Validation in a 250 nm EPIC BiCMOS Technology. <i>Journal of Lightwave Technology</i>, <i>43</i>(1), 255–270. <a href=\"https://doi.org/10.1109/JLT.2024.3450949\">https://doi.org/10.1109/JLT.2024.3450949</a>"},"page":"255-270","intvolume":"        43","issue":"1","keyword":["Integrated circuit modeling","Capacitance","Silicon","Modulation","Adaptation models","Semiconductor device modeling","Bandwidth","Data communication","electrooptical transmitter","equalization","free-carrier-plasma dispersion effect","modelling","optical modulator","phase shifter","silicon photonics"],"language":[{"iso":"eng"}],"_id":"62643","user_id":"38254","department":[{"_id":"58"}],"status":"public","type":"journal_article","publication":"Journal of Lightwave Technology"},{"status":"public","publication":"IEEE Access","type":"journal_article","keyword":["Optical attenuators","Equalizers","Phase shifters","Optical modulation","Electro-optic modulators","Optical amplifiers","Circuits","Silicon photonics","Optical saturation","Integrated circuit modeling","Data communication","equalization","electro-optical transmitter","silicon photonics","phase shifter","optical modulator","free-carrier plasma dispersion effect","driver architectures","biasing schemes"],"language":[{"iso":"eng"}],"_id":"62644","department":[{"_id":"58"}],"user_id":"38254","year":"2025","intvolume":"        13","page":"192433-192450","citation":{"chicago":"Schwabe, Tobias, Christian Kress, Babak Sadiye, Stephan Kruse, and J. Christoph Scheytt. “Analysis and Design of Forward Biased Silicon Photonics Phase Shifter Equalizer Circuits.” <i>IEEE Access</i> 13 (2025): 192433–50. <a href=\"https://doi.org/10.1109/ACCESS.2025.3629385\">https://doi.org/10.1109/ACCESS.2025.3629385</a>.","ieee":"T. Schwabe, C. Kress, B. Sadiye, S. Kruse, and J. C. Scheytt, “Analysis and Design of Forward Biased Silicon Photonics Phase Shifter Equalizer Circuits,” <i>IEEE Access</i>, vol. 13, pp. 192433–192450, 2025, doi: <a href=\"https://doi.org/10.1109/ACCESS.2025.3629385\">10.1109/ACCESS.2025.3629385</a>.","ama":"Schwabe T, Kress C, Sadiye B, Kruse S, Scheytt JC. Analysis and Design of Forward Biased Silicon Photonics Phase Shifter Equalizer Circuits. <i>IEEE Access</i>. 2025;13:192433-192450. doi:<a href=\"https://doi.org/10.1109/ACCESS.2025.3629385\">10.1109/ACCESS.2025.3629385</a>","bibtex":"@article{Schwabe_Kress_Sadiye_Kruse_Scheytt_2025, title={Analysis and Design of Forward Biased Silicon Photonics Phase Shifter Equalizer Circuits}, volume={13}, DOI={<a href=\"https://doi.org/10.1109/ACCESS.2025.3629385\">10.1109/ACCESS.2025.3629385</a>}, journal={IEEE Access}, author={Schwabe, Tobias and Kress, Christian and Sadiye, Babak and Kruse, Stephan and Scheytt, J. Christoph}, year={2025}, pages={192433–192450} }","mla":"Schwabe, Tobias, et al. “Analysis and Design of Forward Biased Silicon Photonics Phase Shifter Equalizer Circuits.” <i>IEEE Access</i>, vol. 13, 2025, pp. 192433–50, doi:<a href=\"https://doi.org/10.1109/ACCESS.2025.3629385\">10.1109/ACCESS.2025.3629385</a>.","short":"T. Schwabe, C. Kress, B. Sadiye, S. Kruse, J.C. Scheytt, IEEE Access 13 (2025) 192433–192450.","apa":"Schwabe, T., Kress, C., Sadiye, B., Kruse, S., &#38; Scheytt, J. C. (2025). Analysis and Design of Forward Biased Silicon Photonics Phase Shifter Equalizer Circuits. <i>IEEE Access</i>, <i>13</i>, 192433–192450. <a href=\"https://doi.org/10.1109/ACCESS.2025.3629385\">https://doi.org/10.1109/ACCESS.2025.3629385</a>"},"title":"Analysis and Design of Forward Biased Silicon Photonics Phase Shifter Equalizer Circuits","doi":"10.1109/ACCESS.2025.3629385","date_updated":"2025-11-27T07:16:06Z","volume":13,"date_created":"2025-11-27T07:14:48Z","author":[{"full_name":"Schwabe, Tobias","id":"39217","last_name":"Schwabe","first_name":"Tobias"},{"first_name":"Christian","last_name":"Kress","orcid":"0000-0002-4403-2237","id":"13256","full_name":"Kress, Christian"},{"first_name":"Babak","last_name":"Sadiye","id":"93634","full_name":"Sadiye, Babak"},{"first_name":"Stephan","full_name":"Kruse, Stephan","id":"38254","last_name":"Kruse"},{"first_name":"J. Christoph","full_name":"Scheytt, J. Christoph","id":"37144","last_name":"Scheytt","orcid":"0000-0002-5950-6618 "}]},{"citation":{"short":"H. Giese, R. Koch, C. Sureth-Sloane, Where to Locate Tax Employees? The Role of Tax Complexity and Tax Risk Implications, 2024.","mla":"Giese, Henning, et al. <i>Where to Locate Tax Employees? The Role of Tax Complexity and Tax Risk Implications</i>. 2024, doi:<a href=\"https://doi.org/10.2139/ssrn.4888151\">10.2139/ssrn.4888151</a>.","bibtex":"@book{Giese_Koch_Sureth-Sloane_2024, series={TRR 266 Accounting for Transparency Working Paper Series No. 149}, title={Where to Locate Tax Employees? The Role of Tax Complexity and Tax Risk Implications}, DOI={<a href=\"https://doi.org/10.2139/ssrn.4888151\">10.2139/ssrn.4888151</a>}, author={Giese, Henning and Koch, Reinald and Sureth-Sloane, Caren}, year={2024}, collection={TRR 266 Accounting for Transparency Working Paper Series No. 149} }","apa":"Giese, H., Koch, R., &#38; Sureth-Sloane, C. (2024). <i>Where to Locate Tax Employees? The Role of Tax Complexity and Tax Risk Implications</i>. <a href=\"https://doi.org/10.2139/ssrn.4888151\">https://doi.org/10.2139/ssrn.4888151</a>","chicago":"Giese, Henning, Reinald Koch, and Caren Sureth-Sloane. <i>Where to Locate Tax Employees? The Role of Tax Complexity and Tax Risk Implications</i>. TRR 266 Accounting for Transparency Working Paper Series No. 149, 2024. <a href=\"https://doi.org/10.2139/ssrn.4888151\">https://doi.org/10.2139/ssrn.4888151</a>.","ieee":"H. Giese, R. Koch, and C. Sureth-Sloane, <i>Where to Locate Tax Employees? The Role of Tax Complexity and Tax Risk Implications</i>. 2024.","ama":"Giese H, Koch R, Sureth-Sloane C. <i>Where to Locate Tax Employees? The Role of Tax Complexity and Tax Risk Implications</i>.; 2024. doi:<a href=\"https://doi.org/10.2139/ssrn.4888151\">10.2139/ssrn.4888151</a>"},"year":"2024","publication_status":"published","doi":"10.2139/ssrn.4888151","main_file_link":[{"url":"https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4888151","open_access":"1"}],"title":"Where to Locate Tax Employees? The Role of Tax Complexity and Tax Risk Implications","date_created":"2023-12-19T13:22:08Z","author":[{"full_name":"Giese, Henning","id":"92812","last_name":"Giese","first_name":"Henning"},{"last_name":"Koch","full_name":"Koch, Reinald","first_name":"Reinald"},{"first_name":"Caren","orcid":" 0000-0002-8183-5901","last_name":"Sureth-Sloane","full_name":"Sureth-Sloane, Caren","id":"530"}],"oa":"1","date_updated":"2024-12-07T14:13:15Z","status":"public","abstract":[{"lang":"eng","text":"This study analyzes the impact of tax complexity on the location of tax employees and tax risk. Using a hand-collected dataset of more than 7,500 tax employees from 348 European-listed multinationals, we identify two types of firm-level costs associated with tax complexity—tax employees, and tax risk. We find that firms locate more tax employees in countries with greater tax complexity. This association is particularly pronounced for complexity in tax procedures. We also find that multinationals operating in countries with high tax complexity are associated with higher tax risk. The incremental tax risk vanishes for firms that locate more tax employees in countries with highly complex tax procedures, while we find no risk reduction from additional tax employees in countries with complex tax rules. Our results reveal that multinationals eliminate 25 percent of overall tax complexity-related tax risk through targeted location of tax employees."}],"type":"working_paper","language":[{"iso":"eng"}],"keyword":["tax complexity","tax complexity cost","tax department","tax employees","tax risk"],"department":[{"_id":"187"}],"user_id":"530","series_title":"TRR 266 Accounting for Transparency Working Paper Series No. 149","_id":"49873"},{"user_id":"22527","_id":"30917","file_date_updated":"2022-04-19T15:06:49Z","language":[{"iso":"eng"}],"keyword":["Group formation","Rent-seeking","Free riding"],"article_type":"original","ddc":["330"],"publication":"Quick And Easy Journal Title","type":"journal_article","status":"public","file":[{"relation":"main_file","content_type":"application/pdf","file_size":270316,"file_id":"30918","file_name":"Coalition formation versus free riding in rent-seeking contests.pdf","access_level":"open_access","date_updated":"2022-04-19T15:06:49Z","date_created":"2022-04-19T15:06:49Z","creator":"lblock"}],"abstract":[{"text":"We study lobby group formation in a two-stage model where the players \u001crst form lobby\r\ngroups that then engage in a rent-seeking contest to in\u001duence the legislator. However, the\r\noutcome of the contest a\u001bects all players according to the ideological distance between the\r\nimplemented policy and the players' preferences. The players can either lobby by themselves,\r\nform a coalition of lobbyists or free ride. We \u001cnd that free coalition formation is reasonable\r\nif either players with moderate preferences face lobby groups with extreme preferences, or if\r\nthere are two opposing coalitions with an equal number of members. Otherwise, there are\r\nalways free riders among the players.","lang":"eng"}],"author":[{"last_name":"Block","id":"22527","full_name":"Block, Lukas","first_name":"Lukas"}],"date_created":"2022-04-19T15:06:55Z","date_updated":"2022-04-19T15:09:44Z","oa":"1","title":"Coalition formation versus free riding in rent-seeking contests","has_accepted_license":"1","jel":["C71","D72","D74"],"citation":{"apa":"Block, L. (2022). Coalition formation versus free riding in rent-seeking contests. <i>Quick And Easy Journal Title</i>.","bibtex":"@article{Block_2022, title={Coalition formation versus free riding in rent-seeking contests}, journal={Quick And Easy Journal Title}, author={Block, Lukas}, year={2022} }","mla":"Block, Lukas. “Coalition Formation versus Free Riding in Rent-Seeking Contests.” <i>Quick And Easy Journal Title</i>, 2022.","short":"L. Block, Quick And Easy Journal Title (2022).","chicago":"Block, Lukas. “Coalition Formation versus Free Riding in Rent-Seeking Contests.” <i>Quick And Easy Journal Title</i>, 2022.","ieee":"L. Block, “Coalition formation versus free riding in rent-seeking contests,” <i>Quick And Easy Journal Title</i>, 2022.","ama":"Block L. Coalition formation versus free riding in rent-seeking contests. <i>Quick And Easy Journal Title</i>. Published online 2022."},"year":"2022"},{"publication":"Proceedings of the 11th International Conference on Pattern Recognition Applications and Methods (ICPRAM)","type":"conference","abstract":[{"lang":"eng","text":"Ultrasonic wire bonding is a solid-state joining process used to form electrical interconnections in micro and\r\npower electronics and batteries. A high frequency oscillation causes a metallurgical bond deformation in\r\nthe contact area. Due to the numerous physical influencing factors, it is very difficult to accurately capture\r\nthis process in a model. Therefore, our goal is to determine a suitable feed-forward control strategy for the\r\nbonding process even without detailed model knowledge. We propose the use of batch constrained Bayesian\r\noptimization for the control design. Hence, Bayesian optimization is precisely adapted to the application of\r\nbonding: the constraint is used to check one quality feature of the process and the use of batches leads to\r\nmore efficient experiments. Our approach is suitable to determine a feed-forward control for the bonding\r\nprocess that provides very high quality bonds without using a physical model. We also show that the quality\r\nof the Bayesian optimization based control outperforms random search as well as manual search by a user.\r\nUsing a simple prior knowledge model derived from data further improves the quality of the connection.\r\nThe Bayesian optimization approach offers the possibility to perform a sensitivity analysis of the control\r\nparameters, which allows to evaluate the influence of each control parameter on the bond quality. In summary,\r\nBayesian optimization applied to the bonding process provides an excellent opportunity to develop a feedforward\r\ncontrol without full modeling of the underlying physical processes."}],"status":"public","_id":"29803","department":[{"_id":"153"},{"_id":"880"}],"user_id":"82875","keyword":["Bayesian optimization","Wire bonding","Feed-forward control","model-free design"],"language":[{"iso":"eng"}],"quality_controlled":"1","publication_identifier":{"isbn":["978-989-758-549-4"]},"year":"2022","page":"383-394","citation":{"apa":"Hesse, M., Hunstig, M., Timmermann, J., &#38; Trächtler, A. (2022). Batch Constrained Bayesian Optimization for UltrasonicWire Bonding Feed-forward Control Design. <i>Proceedings of the 11th International Conference on Pattern Recognition Applications and Methods (ICPRAM)</i>, 383–394.","short":"M. Hesse, M. Hunstig, J. Timmermann, A. Trächtler, in: Proceedings of the 11th International Conference on Pattern Recognition Applications and Methods (ICPRAM), 2022, pp. 383–394.","bibtex":"@inproceedings{Hesse_Hunstig_Timmermann_Trächtler_2022, title={Batch Constrained Bayesian Optimization for UltrasonicWire Bonding Feed-forward Control Design}, booktitle={Proceedings of the 11th International Conference on Pattern Recognition Applications and Methods (ICPRAM)}, author={Hesse, Michael and Hunstig, Matthias and Timmermann, Julia and Trächtler, Ansgar}, year={2022}, pages={383–394} }","mla":"Hesse, Michael, et al. “Batch Constrained Bayesian Optimization for UltrasonicWire Bonding Feed-Forward Control Design.” <i>Proceedings of the 11th International Conference on Pattern Recognition Applications and Methods (ICPRAM)</i>, 2022, pp. 383–94.","ama":"Hesse M, Hunstig M, Timmermann J, Trächtler A. Batch Constrained Bayesian Optimization for UltrasonicWire Bonding Feed-forward Control Design. In: <i>Proceedings of the 11th International Conference on Pattern Recognition Applications and Methods (ICPRAM)</i>. ; 2022:383-394.","ieee":"M. Hesse, M. Hunstig, J. Timmermann, and A. Trächtler, “Batch Constrained Bayesian Optimization for UltrasonicWire Bonding Feed-forward Control Design,” in <i>Proceedings of the 11th International Conference on Pattern Recognition Applications and Methods (ICPRAM)</i>, Online, 2022, pp. 383–394.","chicago":"Hesse, Michael, Matthias Hunstig, Julia Timmermann, and Ansgar Trächtler. “Batch Constrained Bayesian Optimization for UltrasonicWire Bonding Feed-Forward Control Design.” In <i>Proceedings of the 11th International Conference on Pattern Recognition Applications and Methods (ICPRAM)</i>, 383–94, 2022."},"date_updated":"2024-11-13T08:44:17Z","date_created":"2022-02-09T12:50:25Z","author":[{"first_name":"Michael","last_name":"Hesse","full_name":"Hesse, Michael","id":"29222"},{"first_name":"Matthias","last_name":"Hunstig","full_name":"Hunstig, Matthias"},{"first_name":"Julia","id":"15402","full_name":"Timmermann, Julia","last_name":"Timmermann"},{"first_name":"Ansgar","last_name":"Trächtler","id":"552","full_name":"Trächtler, Ansgar"}],"title":"Batch Constrained Bayesian Optimization for UltrasonicWire Bonding Feed-forward Control Design","conference":{"location":"Online","end_date":"2022-02-05","start_date":"2022-02-03","name":"11th International Conference on Pattern Recognition Applications and Methods"}},{"main_file_link":[{"url":"https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3853927"}],"title":"Cost of Debt for Private Firms Revisited: Voluntary Audits as a Reflection of Risk","date_created":"2023-01-17T15:03:08Z","author":[{"full_name":"Ichev, Riste","last_name":"Ichev","first_name":"Riste"},{"first_name":"Jernej","last_name":"Koren","full_name":"Koren, Jernej"},{"first_name":"Urska","id":"54068","full_name":"Kosi, Urska","last_name":"Kosi"},{"first_name":"Katarina","last_name":"Sitar Sustar","full_name":"Sitar Sustar, Katarina"},{"full_name":"Valentincic, Aljosa","last_name":"Valentincic","first_name":"Aljosa"}],"date_updated":"2023-01-18T13:40:40Z","citation":{"ama":"Ichev R, Koren J, Kosi U, Sitar Sustar K, Valentincic A. <i>Cost of Debt for Private Firms Revisited: Voluntary Audits as a Reflection of Risk</i>.; 2021.","ieee":"R. Ichev, J. Koren, U. Kosi, K. Sitar Sustar, and A. Valentincic, <i>Cost of Debt for Private Firms Revisited: Voluntary Audits as a Reflection of Risk</i>. 2021.","chicago":"Ichev, Riste, Jernej Koren, Urska Kosi, Katarina Sitar Sustar, and Aljosa Valentincic. <i>Cost of Debt for Private Firms Revisited: Voluntary Audits as a Reflection of Risk</i>, 2021.","bibtex":"@book{Ichev_Koren_Kosi_Sitar Sustar_Valentincic_2021, title={Cost of Debt for Private Firms Revisited: Voluntary Audits as a Reflection of Risk}, author={Ichev, Riste and Koren, Jernej and Kosi, Urska and Sitar Sustar, Katarina and Valentincic, Aljosa}, year={2021} }","mla":"Ichev, Riste, et al. <i>Cost of Debt for Private Firms Revisited: Voluntary Audits as a Reflection of Risk</i>. 2021.","short":"R. Ichev, J. Koren, U. Kosi, K. Sitar Sustar, A. Valentincic, Cost of Debt for Private Firms Revisited: Voluntary Audits as a Reflection of Risk, 2021.","apa":"Ichev, R., Koren, J., Kosi, U., Sitar Sustar, K., &#38; Valentincic, A. (2021). <i>Cost of Debt for Private Firms Revisited: Voluntary Audits as a Reflection of Risk</i>."},"year":"2021","language":[{"iso":"eng"}],"keyword":["private firms","voluntary audit","cost of debt","self‐selection bias","risk"],"user_id":"88603","department":[{"_id":"635"},{"_id":"186"},{"_id":"551"}],"_id":"37136","status":"public","abstract":[{"text":"This study examines the relation between voluntary audit and the cost of debt in private firms. We use a sample of 4,058 small private firms operating in the period 2006‐2017 that are not subject to mandatory audits. Firms decide for a voluntary audit of financial statements either because the economic setting in which they operate effectively forces them to do so (e.g., ownership complexity, export‐oriented supply chain, subsidiary status) or because firm fundamentals and/or financial reporting practices limit their access to financial debt, both reflected in earnings quality. We use these factors to model the decision for voluntary audit. In the outcome analyses, we find robust evidence that voluntary audits are associated with higher, rather than lower, interest rate by up to 3.0 percentage points. This effect is present regardless of the perceived audit quality (Big‐4 vs. non‐Big‐4), but is stronger for non‐Big‐4 audits where auditees have a stronger position relative to auditors. Audited firms’ earnings are less informative about future operating performance relative to unaudited counterparts. We conclude that voluntary audits facilitate access to financial debt for firms with higher risk that may otherwise have no access to this form of financing. The price paid is reflected in higher interest rates charged to firms with voluntary audits – firms with higher information and/or fundamental risk.","lang":"eng"}],"type":"working_paper"},{"type":"journal_article","status":"public","user_id":"83392","department":[{"_id":"574"}],"project":[{"_id":"410","name":"KnowGraphs: KnowGraphs: Knowledge Graphs at Scale"}],"_id":"25212","file_date_updated":"2024-01-13T11:35:53Z","article_type":"original","publication_status":"accepted","publication_identifier":{"issn":["2210-4968"]},"has_accepted_license":"1","citation":{"bibtex":"@article{Qudus_Saleem_Ngonga Ngomo_Lee, title={An Empirical Evaluation of Cost-based Federated SPARQL Query Processing Engines}, volume={12}, DOI={<a href=\"https://doi.org/10.3233/SW-200420\">10.3233/SW-200420</a>}, number={6}, journal={Semantic Web}, publisher={ISO Press}, author={Qudus, Umair and Saleem, Muhammad and Ngonga Ngomo, Axel-Cyrille and Lee, Young-Koo}, pages={843–868} }","mla":"Qudus, Umair, et al. “An Empirical Evaluation of Cost-Based Federated SPARQL Query Processing Engines.” <i>Semantic Web</i>, vol. 12, no. 6, ISO Press, pp. 843–68, doi:<a href=\"https://doi.org/10.3233/SW-200420\">10.3233/SW-200420</a>.","short":"U. Qudus, M. Saleem, A.-C. Ngonga Ngomo, Y.-K. Lee, Semantic Web 12 (n.d.) 843–868.","apa":"Qudus, U., Saleem, M., Ngonga Ngomo, A.-C., &#38; Lee, Y.-K. (n.d.). An Empirical Evaluation of Cost-based Federated SPARQL Query Processing Engines. <i>Semantic Web</i>, <i>12</i>(6), 843–868. <a href=\"https://doi.org/10.3233/SW-200420\">https://doi.org/10.3233/SW-200420</a>","ieee":"U. Qudus, M. Saleem, A.-C. Ngonga Ngomo, and Y.-K. Lee, “An Empirical Evaluation of Cost-based Federated SPARQL Query Processing Engines,” <i>Semantic Web</i>, vol. 12, no. 6, pp. 843–868, doi: <a href=\"https://doi.org/10.3233/SW-200420\">10.3233/SW-200420</a>.","chicago":"Qudus, Umair, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo, and Young-Koo Lee. “An Empirical Evaluation of Cost-Based Federated SPARQL Query Processing Engines.” <i>Semantic Web</i> 12, no. 6 (n.d.): 843–68. <a href=\"https://doi.org/10.3233/SW-200420\">https://doi.org/10.3233/SW-200420</a>.","ama":"Qudus U, Saleem M, Ngonga Ngomo A-C, Lee Y-K. An Empirical Evaluation of Cost-based Federated SPARQL Query Processing Engines. <i>Semantic Web</i>. 12(6):843-868. doi:<a href=\"https://doi.org/10.3233/SW-200420\">10.3233/SW-200420</a>"},"page":"843-868","intvolume":"        12","author":[{"first_name":"Umair","id":"83392","full_name":"Qudus, Umair","last_name":"Qudus","orcid":"0000-0001-6714-8729"},{"full_name":"Saleem, Muhammad","last_name":"Saleem","first_name":"Muhammad"},{"id":"65716","full_name":"Ngonga Ngomo, Axel-Cyrille","last_name":"Ngonga Ngomo","first_name":"Axel-Cyrille"},{"full_name":"Lee, Young-Koo","last_name":"Lee","first_name":"Young-Koo"}],"volume":12,"date_updated":"2025-09-11T09:50:14Z","doi":"10.3233/SW-200420","publication":"Semantic Web","file":[{"file_name":"swj2604.pdf","file_id":"50483","access_level":"closed","file_size":978478,"date_created":"2024-01-13T11:35:53Z","creator":"uqudus","date_updated":"2024-01-13T11:35:53Z","relation":"main_file","success":1,"content_type":"application/pdf"}],"license":"https://creativecommons.org/publicdomain/zero/1.0/","abstract":[{"lang":"eng","text":"Finding a good query plan is key to the optimization of query runtime. This holds in particular for cost-based federation\r\nengines, which make use of cardinality estimations to achieve this goal. A number of studies compare SPARQL federation engines across different performance metrics, including query runtime, result set completeness and correctness, number of sources selected and number of requests sent. Albeit informative, these metrics are generic and unable to quantify and evaluate the accuracy of the cardinality estimators of cost-based federation engines. To thoroughly evaluate cost-based federation engines, the effect of estimated cardinality errors on the overall query runtime performance must be measured. In this paper, we address this challenge by presenting novel evaluation metrics targeted at a fine-grained benchmarking of cost-based federated SPARQL query engines. We evaluate five cost-based federated SPARQL query engines using existing as well as novel evaluation metrics by using LargeRDFBench queries. Our results provide a detailed analysis of the experimental outcomes that reveal novel insights, useful for the development of future cost-based federated SPARQL query processing engines."}],"language":[{"iso":"eng"}],"ddc":["000"],"keyword":["SPARQL","benchmarking","cost-based","cost-free","federated","querying"],"issue":"6","year":"2021","date_created":"2021-10-01T06:52:52Z","publisher":"ISO Press","title":"An Empirical Evaluation of Cost-based Federated SPARQL Query Processing Engines"},{"author":[{"last_name":"Neumann","full_name":"Neumann, Sarah","first_name":"Sarah"},{"first_name":"Torsten","last_name":"Gutmann","full_name":"Gutmann, Torsten","id":"118165"},{"first_name":"Gerd","last_name":"Buntkowsky","full_name":"Buntkowsky, Gerd"},{"first_name":"Stephen","last_name":"Paul","full_name":"Paul, Stephen"},{"first_name":"Greg","full_name":"Thiele, Greg","last_name":"Thiele"},{"last_name":"Sievers","full_name":"Sievers, Heiko","first_name":"Heiko"},{"first_name":"Marcus","full_name":"Bäumer, Marcus","last_name":"Bäumer"},{"first_name":"Sebastian","last_name":"Kunz","full_name":"Kunz, Sebastian"}],"date_created":"2026-02-07T16:02:06Z","volume":377,"date_updated":"2026-02-17T16:14:45Z","doi":"10.1016/j.jcat.2019.07.049","title":"Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts","citation":{"mla":"Neumann, Sarah, et al. “Insights into the Reaction Mechanism and Particle Size Effects of CO Oxidation over Supported Pt Nanoparticle Catalysts.” <i>Journal of Catalysis</i>, vol. 377, 2019, pp. 662–672, doi:<a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">10.1016/j.jcat.2019.07.049</a>.","bibtex":"@article{Neumann_Gutmann_Buntkowsky_Paul_Thiele_Sievers_Bäumer_Kunz_2019, title={Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts}, volume={377}, DOI={<a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">10.1016/j.jcat.2019.07.049</a>}, journal={Journal of Catalysis}, author={Neumann, Sarah and Gutmann, Torsten and Buntkowsky, Gerd and Paul, Stephen and Thiele, Greg and Sievers, Heiko and Bäumer, Marcus and Kunz, Sebastian}, year={2019}, pages={662–672} }","short":"S. Neumann, T. Gutmann, G. Buntkowsky, S. Paul, G. Thiele, H. Sievers, M. Bäumer, S. Kunz, Journal of Catalysis 377 (2019) 662–672.","apa":"Neumann, S., Gutmann, T., Buntkowsky, G., Paul, S., Thiele, G., Sievers, H., Bäumer, M., &#38; Kunz, S. (2019). Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts. <i>Journal of Catalysis</i>, <i>377</i>, 662–672. <a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">https://doi.org/10.1016/j.jcat.2019.07.049</a>","ama":"Neumann S, Gutmann T, Buntkowsky G, et al. Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts. <i>Journal of Catalysis</i>. 2019;377:662–672. doi:<a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">10.1016/j.jcat.2019.07.049</a>","chicago":"Neumann, Sarah, Torsten Gutmann, Gerd Buntkowsky, Stephen Paul, Greg Thiele, Heiko Sievers, Marcus Bäumer, and Sebastian Kunz. “Insights into the Reaction Mechanism and Particle Size Effects of CO Oxidation over Supported Pt Nanoparticle Catalysts.” <i>Journal of Catalysis</i> 377 (2019): 662–672. <a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">https://doi.org/10.1016/j.jcat.2019.07.049</a>.","ieee":"S. Neumann <i>et al.</i>, “Insights into the reaction mechanism and particle size effects of CO oxidation over supported Pt nanoparticle catalysts,” <i>Journal of Catalysis</i>, vol. 377, pp. 662–672, 2019, doi: <a href=\"https://doi.org/10.1016/j.jcat.2019.07.049\">10.1016/j.jcat.2019.07.049</a>."},"page":"662–672","intvolume":"       377","year":"2019","user_id":"100715","_id":"64018","language":[{"iso":"eng"}],"extern":"1","keyword":["Solid state NMR","“Surfactant-free” platinum nanoparticles","CO oxidation","Particle size effect","Structure sensitivity"],"type":"journal_article","publication":"Journal of Catalysis","status":"public","abstract":[{"lang":"eng","text":"CO oxidation is an extensively studied reaction in heterogeneous catalysis due to its seeming simplicity and its great importance for emission control. However, the role of particle size and more specifically structure sensitivity in this reaction is still controversial. In the present study, colloidal “surfactant-free” Pt nanoparticles (NPs) in a size regime of 1–4 nm with narrow size distribution and control over particle size were synthesized and subsequently supported on Al2O3 to prepare model catalysts. CO oxidation was performed using Pt NPs catalysts with particles sizes of 1, 2, 3, and 4 nm at different reaction temperatures. It is shown that the reaction exhibits a particle size effect that depends strongly on the reaction conditions. At 170 °C, the reaction seems to proceed within the same kinetic regime for all particle sizes, but the surface normalized activity depends strongly on the particle size, with maximum activity for nanoparticles 2 nm in diameter. A temperature increase to 200 °C leads to a change of the kinetic regime that depends on the particle size. For Pt NPs 1 nm in diameter a reaction order of 1 for O2 was observed, indicating that O2 adsorbs molecularly and dissociates in a following step, which represents the generally accepted mechanism on Pt surfaces. The reaction order of −1 for CO demonstrates that the surface is saturated with CO under reaction conditions. With increasing particle size, the reaction orders of O2 and CO change. For particles 2 nm in size, an increase in temperature also results in reaction orders of 1 for O2 and −1 for CO; NPs of 3 and 4 nm, even at higher temperatures, show no clear kinetic behavior that can be explained by a single reaction mechanism. Instead, the Boudouard reaction between two adjacent adsorbed CO molecules was identified as an important additional reaction pathway that occurs preferentially on large particles and causes more complex kinetics."}]},{"author":[{"last_name":"Schwabe","full_name":"Schwabe, Tobias","id":"39217","first_name":"Tobias"},{"first_name":"Axel","last_name":"Balke","full_name":"Balke, Axel"},{"full_name":"Bezuidenhout, Petrone H.","last_name":"Bezuidenhout","first_name":"Petrone H."},{"last_name":"Reker","full_name":"Reker, Julia","first_name":"Julia"},{"last_name":"Meyers","full_name":"Meyers, Thorsten","first_name":"Thorsten"},{"first_name":"Trudi-Heleen","full_name":"Joubert, Trudi-Heleen","last_name":"Joubert"},{"first_name":"Ulrich","last_name":"Hilleringmann","full_name":"Hilleringmann, Ulrich","id":"20179"}],"date_created":"2025-03-31T16:06:43Z","volume":11043,"date_updated":"2025-04-02T11:34:07Z","publisher":"SPIE","doi":"10.1117/12.2501507","title":"Oxygen detection with zinc oxide nanoparticle structures","citation":{"ama":"Schwabe T, Balke A, Bezuidenhout PH, et al. Oxygen detection with zinc oxide nanoparticle structures. In: du Plessis M, ed. <i>Fifth Conference on Sensors, MEMS, and Electro-Optic Systems</i>. Vol 11043. SPIE; 2019:1104316. doi:<a href=\"https://doi.org/10.1117/12.2501507\">10.1117/12.2501507</a>","chicago":"Schwabe, Tobias, Axel Balke, Petrone H. Bezuidenhout, Julia Reker, Thorsten Meyers, Trudi-Heleen Joubert, and Ulrich Hilleringmann. “Oxygen Detection with Zinc Oxide Nanoparticle Structures.” In <i>Fifth Conference on Sensors, MEMS, and Electro-Optic Systems</i>, edited by Monuko du Plessis, 11043:1104316. SPIE, 2019. <a href=\"https://doi.org/10.1117/12.2501507\">https://doi.org/10.1117/12.2501507</a>.","ieee":"T. Schwabe <i>et al.</i>, “Oxygen detection with zinc oxide nanoparticle structures,” in <i>Fifth Conference on Sensors, MEMS, and Electro-Optic Systems</i>, 2019, vol. 11043, p. 1104316, doi: <a href=\"https://doi.org/10.1117/12.2501507\">10.1117/12.2501507</a>.","apa":"Schwabe, T., Balke, A., Bezuidenhout, P. H., Reker, J., Meyers, T., Joubert, T.-H., &#38; Hilleringmann, U. (2019). Oxygen detection with zinc oxide nanoparticle structures. In M. du Plessis (Ed.), <i>Fifth Conference on Sensors, MEMS, and Electro-Optic Systems</i> (Vol. 11043, p. 1104316). SPIE. <a href=\"https://doi.org/10.1117/12.2501507\">https://doi.org/10.1117/12.2501507</a>","bibtex":"@inproceedings{Schwabe_Balke_Bezuidenhout_Reker_Meyers_Joubert_Hilleringmann_2019, title={Oxygen detection with zinc oxide nanoparticle structures}, volume={11043}, DOI={<a href=\"https://doi.org/10.1117/12.2501507\">10.1117/12.2501507</a>}, booktitle={Fifth Conference on Sensors, MEMS, and Electro-Optic Systems}, publisher={SPIE}, author={Schwabe, Tobias and Balke, Axel and Bezuidenhout, Petrone H. and Reker, Julia and Meyers, Thorsten and Joubert, Trudi-Heleen and Hilleringmann, Ulrich}, editor={du Plessis, Monuko}, year={2019}, pages={1104316} }","mla":"Schwabe, Tobias, et al. “Oxygen Detection with Zinc Oxide Nanoparticle Structures.” <i>Fifth Conference on Sensors, MEMS, and Electro-Optic Systems</i>, edited by Monuko du Plessis, vol. 11043, SPIE, 2019, p. 1104316, doi:<a href=\"https://doi.org/10.1117/12.2501507\">10.1117/12.2501507</a>.","short":"T. Schwabe, A. Balke, P.H. Bezuidenhout, J. Reker, T. Meyers, T.-H. Joubert, U. Hilleringmann, in: M. du Plessis (Ed.), Fifth Conference on Sensors, MEMS, and Electro-Optic Systems, SPIE, 2019, p. 1104316."},"page":"1104316","intvolume":"     11043","year":"2019","user_id":"39217","_id":"59220","language":[{"iso":"eng"}],"keyword":["sensing","zinc oxide","thin-film transistor","oxygen measurement","low-cost electronics","water quality analysis","printable electronics","flexible electronics"],"type":"conference","publication":"Fifth Conference on Sensors, MEMS, and Electro-Optic Systems","status":"public","editor":[{"last_name":"du Plessis","full_name":"du Plessis, Monuko","first_name":"Monuko"}]},{"publication":"Journal of Business Research","type":"journal_article","abstract":[{"lang":"eng","text":"Manufacturers increasingly integrate information and communication technologies into their products so that they can provide IT-based services. Organizations that formerly concentrated on transactional sales thus confront a new challenge associated with managing service usage—retention and extracting value from investments in smart technology. This study combines a marketing and an information systems perspective in a field study conducted jointly with a large European car manufacturer. Understanding the renewal decision for IT-based service contracts requires knowledge from both disciplines. The paper shows that combining behavioral predictor variables stemming from marketing research and technology-related perceptual variables stemming from technology acceptance research increases the explanatory power and prediction accuracy of forecasting models for customer renewal decisions. Specifically, the authors show that perceptions of usefulness become more important the longer customers use IT-based services and the more services they use within the service contract."}],"status":"public","_id":"4947","department":[{"_id":"178"},{"_id":"181"}],"user_id":"37741","keyword":["IT-based service","Smart services","Contract renewal","Retention","Customer churn","Free trial"],"article_type":"original","language":[{"iso":"eng"}],"publication_status":"published","issue":"79","year":"2017","page":"181--188","citation":{"chicago":"Wangenheim, Florian v, Nancy Wünderlich, and Jan H Schumann. “Renew or Cancel? Drivers of Customer Renewal Decisions for IT-Based Service Contracts.” <i>Journal of Business Research</i>, no. 79 (2017): 181--188.","ieee":"F. v Wangenheim, N. Wünderlich, and J. H. Schumann, “Renew or cancel? Drivers of customer renewal decisions for IT-based service contracts,” <i>Journal of Business Research</i>, no. 79, pp. 181--188, 2017.","ama":"Wangenheim F v, Wünderlich N, Schumann JH. Renew or cancel? Drivers of customer renewal decisions for IT-based service contracts. <i>Journal of Business Research</i>. 2017;(79):181--188.","short":"F. v Wangenheim, N. Wünderlich, J.H. Schumann, Journal of Business Research (2017) 181--188.","bibtex":"@article{Wangenheim_Wünderlich_Schumann_2017, title={Renew or cancel? Drivers of customer renewal decisions for IT-based service contracts}, number={79}, journal={Journal of Business Research}, publisher={Elsevier}, author={Wangenheim, Florian v and Wünderlich, Nancy and Schumann, Jan H}, year={2017}, pages={181--188} }","mla":"Wangenheim, Florian v, et al. “Renew or Cancel? Drivers of Customer Renewal Decisions for IT-Based Service Contracts.” <i>Journal of Business Research</i>, no. 79, Elsevier, 2017, pp. 181--188.","apa":"Wangenheim, F. v, Wünderlich, N., &#38; Schumann, J. H. (2017). Renew or cancel? Drivers of customer renewal decisions for IT-based service contracts. <i>Journal of Business Research</i>, (79), 181--188."},"publisher":"Elsevier","date_updated":"2022-01-06T07:01:30Z","date_created":"2018-10-26T10:11:34Z","author":[{"last_name":"Wangenheim","full_name":"Wangenheim, Florian v","first_name":"Florian v"},{"full_name":"Wünderlich, Nancy","id":"36392","last_name":"Wünderlich","first_name":"Nancy"},{"first_name":"Jan H","last_name":"Schumann","full_name":"Schumann, Jan H"}],"title":"Renew or cancel? Drivers of customer renewal decisions for IT-based service contracts"},{"_id":"4586","user_id":"64756","department":[{"_id":"275"}],"article_type":"letter_note","keyword":["interest rate pass-through models","error correction models","bank efficiency","cost efficiency","stochastic frontier analysis"],"language":[{"iso":"eng"}],"type":"journal_article","publication":"Credit and Capital Markets--Kredit und Kapital","abstract":[{"text":"This study examines the loan-pricing behavior of German banks for a large variety of retail and corporate loan products. We find that a bank’s operational efficiency is priced in bank loan rates and alters interest-setting behavior. Specifically, we establish that a higher degree of operational efficiency leads to lower loan markups, which makes prices more competitive and smoothes the setting of interest rates. By employing state-of-the-art stochastic frontier efficiency measures to capture a bank’s operational efficiency, we take a look at the bank customers’ perspective and demonstrate the extent to which bor-rowers benefit from cost-efficient banking. ","lang":"eng"}],"status":"public","date_updated":"2022-01-06T07:01:14Z","author":[{"first_name":"Tobias","last_name":"Schlueter","full_name":"Schlueter, Tobias"},{"last_name":"Busch","full_name":"Busch, Ramona","first_name":"Ramona"},{"last_name":"Sievers","full_name":"Sievers, Soenke","first_name":"Soenke"},{"full_name":"Hartmann-Wendels, Thomas","last_name":"Hartmann-Wendels","first_name":"Thomas"}],"date_created":"2018-10-09T09:04:17Z","volume":49,"title":"Loan Pricing: Do Borrowers Benefit from Cost-Efficient Banking?","doi":"10.3790/ccm.49.1.93","publication_status":"published","issue":"1","year":"2016","jel":["G21","G28"],"citation":{"chicago":"Schlueter, Tobias, Ramona Busch, Soenke Sievers, and Thomas Hartmann-Wendels. “Loan Pricing: Do Borrowers Benefit from Cost-Efficient Banking?” <i>Credit and Capital Markets--Kredit Und Kapital</i> 49, no. 1 (2016): 93–125. <a href=\"https://doi.org/10.3790/ccm.49.1.93\">https://doi.org/10.3790/ccm.49.1.93</a>.","ieee":"T. Schlueter, R. Busch, S. Sievers, and T. Hartmann-Wendels, “Loan Pricing: Do Borrowers Benefit from Cost-Efficient Banking?,” <i>Credit and Capital Markets--Kredit und Kapital</i>, vol. 49, no. 1, pp. 93–125, 2016.","ama":"Schlueter T, Busch R, Sievers S, Hartmann-Wendels T. Loan Pricing: Do Borrowers Benefit from Cost-Efficient Banking? <i>Credit and Capital Markets--Kredit und Kapital</i>. 2016;49(1):93-125. doi:<a href=\"https://doi.org/10.3790/ccm.49.1.93\">10.3790/ccm.49.1.93</a>","apa":"Schlueter, T., Busch, R., Sievers, S., &#38; Hartmann-Wendels, T. (2016). Loan Pricing: Do Borrowers Benefit from Cost-Efficient Banking? <i>Credit and Capital Markets--Kredit Und Kapital</i>, <i>49</i>(1), 93–125. <a href=\"https://doi.org/10.3790/ccm.49.1.93\">https://doi.org/10.3790/ccm.49.1.93</a>","short":"T. Schlueter, R. Busch, S. Sievers, T. Hartmann-Wendels, Credit and Capital Markets--Kredit Und Kapital 49 (2016) 93–125.","bibtex":"@article{Schlueter_Busch_Sievers_Hartmann-Wendels_2016, title={Loan Pricing: Do Borrowers Benefit from Cost-Efficient Banking?}, volume={49}, DOI={<a href=\"https://doi.org/10.3790/ccm.49.1.93\">10.3790/ccm.49.1.93</a>}, number={1}, journal={Credit and Capital Markets--Kredit und Kapital}, author={Schlueter, Tobias and Busch, Ramona and Sievers, Soenke and Hartmann-Wendels, Thomas}, year={2016}, pages={93–125} }","mla":"Schlueter, Tobias, et al. “Loan Pricing: Do Borrowers Benefit from Cost-Efficient Banking?” <i>Credit and Capital Markets--Kredit Und Kapital</i>, vol. 49, no. 1, 2016, pp. 93–125, doi:<a href=\"https://doi.org/10.3790/ccm.49.1.93\">10.3790/ccm.49.1.93</a>."},"page":"93-125","intvolume":"        49"},{"type":"conference","publication":"IEEE 66th Electronic Components and Technology Conference","status":"public","abstract":[{"lang":"eng","text":"Ultrasonic heavy wire bonding is a commonly used technology to conduct electrical devices in power electronics. In order to facilitate powerful solutions combined with an increased efficiency, involving a material change from aluminum to copper wire as conductor material takes place in recent years. Due to the material related properties, copper wire bonding requires significant higher bond processing parameters such as bond force and ultrasonic power compared to aluminum which can lead to damages or a failure of the bonded component. Therefore, a profound knowledge of the processes prevailing during wire bonding is essential to optimize the application of the copper wires and consequently to achieve the demands on quality and reliability. The behavior of different natural surface oxides of aluminum and copper are assumed to be one reason for the deviation in the required bond parameters. Accordingly, the impact of differently pre-treated substrates surfaces on which the bonding is applied were investigated in this study. First, all conditions investigated (as-received, oxidefree, AlOx and the CuOx) were characterized by utilizing scanning electron microscopy, energy dispersive X-ray spectroscopy, focused ion beam microscopy and atomic force microscopy. In addition, hardness tests were performed as well as perthometer measurements. Afterwards, a 500 $\\mu$ m copper wire was bonded on the generated surfaces investigated. In consideration of the roughness, shear test of various bond times and microscopic images were evaluated. Finally, the results were compared and discussed. Overall, the current study indicates that an Al-oxide layer is beneficial for welding process in Cu wire bonding. On the contrary, the Cu-oxide is detrimental and leads to a delayed welding of the joining parts. Based on the obtained results, it can be expected that due to an ideal set of Al-oxide layers, lower optimal bond parameters can used to reach high bond strength with good reliability properties."}],"user_id":"55222","department":[{"_id":"151"}],"_id":"9959","language":[{"iso":"eng"}],"keyword":["Ultrasonic copper wire bonding","Al-oxide","Cuoxide","oxide-free","roughness","morphology"],"quality_controlled":"1","citation":{"ieee":"F. Eacock <i>et al.</i>, “Effect of different oxide layers on the ultrasonic copper wire bond process,” in <i>IEEE 66th Electronic Components and Technology Conference</i>, 2016, pp. 2111–2118.","chicago":"Eacock, Florian, Andreas Unger, Paul Eichwald, Olexandr Grydin, Florian Hengsbach, Simon Althoff, Mirko Schaper, and Karsten Guth. “Effect of Different Oxide Layers on the Ultrasonic Copper Wire Bond Process.” In <i>IEEE 66th Electronic Components and Technology Conference</i>, 2111–18, 2016. <a href=\"https://doi.org/10.1109/ECTC.2016.91\">https://doi.org/10.1109/ECTC.2016.91</a>.","ama":"Eacock F, Unger A, Eichwald P, et al. Effect of different oxide layers on the ultrasonic copper wire bond process. In: <i>IEEE 66th Electronic Components and Technology Conference</i>. ; 2016:2111-2118. doi:<a href=\"https://doi.org/10.1109/ECTC.2016.91\">10.1109/ECTC.2016.91</a>","short":"F. Eacock, A. Unger, P. Eichwald, O. Grydin, F. Hengsbach, S. Althoff, M. Schaper, K. Guth, in: IEEE 66th Electronic Components and Technology Conference, 2016, pp. 2111–2118.","bibtex":"@inproceedings{Eacock_Unger_Eichwald_Grydin_Hengsbach_Althoff_Schaper_Guth_2016, title={Effect of different oxide layers on the ultrasonic copper wire bond process}, DOI={<a href=\"https://doi.org/10.1109/ECTC.2016.91\">10.1109/ECTC.2016.91</a>}, booktitle={IEEE 66th Electronic Components and Technology Conference}, author={Eacock, Florian and Unger, Andreas and Eichwald, Paul and Grydin, Olexandr and Hengsbach, Florian and Althoff, Simon and Schaper, Mirko and Guth, Karsten}, year={2016}, pages={2111–2118} }","mla":"Eacock, Florian, et al. “Effect of Different Oxide Layers on the Ultrasonic Copper Wire Bond Process.” <i>IEEE 66th Electronic Components and Technology Conference</i>, 2016, pp. 2111–18, doi:<a href=\"https://doi.org/10.1109/ECTC.2016.91\">10.1109/ECTC.2016.91</a>.","apa":"Eacock, F., Unger, A., Eichwald, P., Grydin, O., Hengsbach, F., Althoff, S., … Guth, K. (2016). Effect of different oxide layers on the ultrasonic copper wire bond process. In <i>IEEE 66th Electronic Components and Technology Conference</i> (pp. 2111–2118). <a href=\"https://doi.org/10.1109/ECTC.2016.91\">https://doi.org/10.1109/ECTC.2016.91</a>"},"page":"2111-2118","year":"2016","author":[{"first_name":"Florian","full_name":"Eacock, Florian","last_name":"Eacock"},{"full_name":"Unger, Andreas","last_name":"Unger","first_name":"Andreas"},{"first_name":"Paul","full_name":"Eichwald, Paul","last_name":"Eichwald"},{"last_name":"Grydin","full_name":"Grydin, Olexandr","first_name":"Olexandr"},{"first_name":"Florian","last_name":"Hengsbach","full_name":"Hengsbach, Florian"},{"first_name":"Simon","full_name":"Althoff, Simon","last_name":"Althoff"},{"full_name":"Schaper, Mirko","last_name":"Schaper","first_name":"Mirko"},{"full_name":"Guth, Karsten","last_name":"Guth","first_name":"Karsten"}],"date_created":"2019-05-27T09:00:50Z","date_updated":"2019-09-16T10:38:59Z","doi":"10.1109/ECTC.2016.91","title":"Effect of different oxide layers on the ultrasonic copper wire bond process"},{"publication_status":"published","publication_identifier":{"eissn":["1573-7136"]},"citation":{"apa":"Florou, A., &#38; Kosi, U. (2015). Does mandatory IFRS adoption facilitate debt financing? <i>Review of Accounting Studies</i>, <i>20</i>(4), 1407–1456. <a href=\"https://doi.org/10.1007/s11142\">https://doi.org/10.1007/s11142</a>","bibtex":"@article{Florou_Kosi_2015, title={Does mandatory IFRS adoption facilitate debt financing?}, volume={20}, DOI={<a href=\"https://doi.org/10.1007/s11142\">10.1007/s11142</a>}, number={4}, journal={Review of Accounting Studies}, author={Florou, Annita and Kosi, Urska}, year={2015}, pages={1407–1456} }","short":"A. Florou, U. Kosi, Review of Accounting Studies 20 (2015) 1407–1456.","mla":"Florou, Annita, and Urska Kosi. “Does Mandatory IFRS Adoption Facilitate Debt Financing?” <i>Review of Accounting Studies</i>, vol. 20, no. 4, 2015, pp. 1407–56, doi:<a href=\"https://doi.org/10.1007/s11142\">10.1007/s11142</a>.","ieee":"A. Florou and U. Kosi, “Does mandatory IFRS adoption facilitate debt financing?,” <i>Review of Accounting Studies</i>, vol. 20, no. 4, pp. 1407–1456, 2015, doi: <a href=\"https://doi.org/10.1007/s11142\">10.1007/s11142</a>.","chicago":"Florou, Annita, and Urska Kosi. “Does Mandatory IFRS Adoption Facilitate Debt Financing?” <i>Review of Accounting Studies</i> 20, no. 4 (2015): 1407–56. <a href=\"https://doi.org/10.1007/s11142\">https://doi.org/10.1007/s11142</a>.","ama":"Florou A, Kosi U. Does mandatory IFRS adoption facilitate debt financing? <i>Review of Accounting Studies</i>. 2015;20(4):1407-1456. doi:<a href=\"https://doi.org/10.1007/s11142\">10.1007/s11142</a>"},"jel":["G15","K22","M41","M48"],"intvolume":"        20","page":"1407-1456","author":[{"first_name":"Annita","last_name":"Florou","full_name":"Florou, Annita"},{"last_name":"Kosi","full_name":"Kosi, Urska","id":"54068","first_name":"Urska"}],"volume":20,"date_updated":"2023-01-24T15:32:37Z","doi":"10.1007/s11142","type":"journal_article","status":"public","user_id":"54068","department":[{"_id":"551"},{"_id":"635"},{"_id":"186"}],"_id":"4035","extern":"1","issue":"4","year":"2015","date_created":"2018-08-22T07:47:41Z","title":"Does mandatory IFRS adoption facilitate debt financing?","publication":"Review of Accounting Studies","abstract":[{"text":"We examine whether the mandated introduction of International Financial Reporting Standards (IFRS) is associated with the propensity to access the public rather than private debt market and the cost of debt. We use a global sample of public bonds and private loans and find that mandatory IFRS adopters are more likely, post-IFRS, to issue bonds than to borrow privately. We also find that mandatory IFRS adopters pay lower bond yield spreads, but not lower loan spreads, after the mandate. These findings are consistent with debt providers responding positively to financial reporting of higher quality and comparability, but only when there is a greater reliance on publicly available financial statements than private communication. Lastly, we document that the observed debt market benefits are concentrated in countries with larger differences between domestic GAAP and IFRS and are present even for EU countries that did not experience concurrent financial reporting enforcement or other institutional reforms. Overall, our study documents positive economic consequences around the mandated IFRS adoption for corporate debt financing and, in particular, for bond financing.","lang":"eng"}],"language":[{"iso":"eng"}],"keyword":["Accounting regulation","IFRS","Accounting quality","Public and private debt markets","Cost of debt"]},{"type":"journal_article","publication":"Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on","abstract":[{"text":"(K,Na)NbO3 ceramics have attracted much attention as lead-free piezoelectric materials with high piezoelectric properties. High-quality (K,Na)NbO3 ceramics can be sintered using KNbO3 and NaNbO3 powders synthesized by a hydrothermal method. In this study, to enhance the quality factor of the ceramics, high-power ultrasonic irradiation was employed during the hydrothermal method, which led to a reduction in the particle size of the resultant powders.","lang":"eng"}],"status":"public","_id":"9878","user_id":"55222","department":[{"_id":"151"}],"keyword":["Q-factor","ceramics","crystal growth from solution","particle size","piezoelectric materials","potassium compounds","powders","sintering","sodium compounds","ultrasonic effects","(K0.48Na0.52)NbO3","KNbO3 powders","NaNbO3 powders","high-power ultrasonic irradiation","lead-free piezoelectric materials","lead-free piezoelectric powders","particle size reduction","piezoelectric properties","quality factor","sintered (K0.48Na0.52)NbO3 ceramics","sintering","ultrasonic-assisted hydrothermal method","Acoustics","Ceramics","Lead","Piezoelectric materials","Powders","Radiation effects","Transducers"],"language":[{"iso":"eng"}],"publication_identifier":{"issn":["0885-3010"]},"quality_controlled":"1","issue":"2","year":"2014","citation":{"chicago":"Isobe, G., Takafumi Maeda, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted Hydrothermal Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” <i>Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions On</i> 61, no. 2 (2014): 225–30. <a href=\"https://doi.org/10.1109/TUFFC.2014.6722608\">https://doi.org/10.1109/TUFFC.2014.6722608</a>.","ieee":"G. Isobe, T. Maeda, P. Bornmann, T. Hemsel, and T. Morita, “Synthesis of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal method and properties of sintered (K0.48Na0.52)NBO3 ceramics,” <i>Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on</i>, vol. 61, no. 2, pp. 225–230, 2014.","ama":"Isobe G, Maeda T, Bornmann P, Hemsel T, Morita T. Synthesis of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal method and properties of sintered (K0.48Na0.52)NBO3 ceramics. <i>Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on</i>. 2014;61(2):225-230. doi:<a href=\"https://doi.org/10.1109/TUFFC.2014.6722608\">10.1109/TUFFC.2014.6722608</a>","mla":"Isobe, G., et al. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted Hydrothermal Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” <i>Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions On</i>, vol. 61, no. 2, 2014, pp. 225–30, doi:<a href=\"https://doi.org/10.1109/TUFFC.2014.6722608\">10.1109/TUFFC.2014.6722608</a>.","bibtex":"@article{Isobe_Maeda_Bornmann_Hemsel_Morita_2014, title={Synthesis of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal method and properties of sintered (K0.48Na0.52)NBO3 ceramics}, volume={61}, DOI={<a href=\"https://doi.org/10.1109/TUFFC.2014.6722608\">10.1109/TUFFC.2014.6722608</a>}, number={2}, journal={Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on}, author={Isobe, G. and Maeda, Takafumi and Bornmann, Peter and Hemsel, Tobias and Morita, Takeshi}, year={2014}, pages={225–230} }","short":"G. Isobe, T. Maeda, P. Bornmann, T. Hemsel, T. Morita, Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions On 61 (2014) 225–230.","apa":"Isobe, G., Maeda, T., Bornmann, P., Hemsel, T., &#38; Morita, T. (2014). Synthesis of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal method and properties of sintered (K0.48Na0.52)NBO3 ceramics. <i>Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions On</i>, <i>61</i>(2), 225–230. <a href=\"https://doi.org/10.1109/TUFFC.2014.6722608\">https://doi.org/10.1109/TUFFC.2014.6722608</a>"},"intvolume":"        61","page":"225-230","date_updated":"2019-09-16T10:53:17Z","author":[{"last_name":"Isobe","full_name":"Isobe, G.","first_name":"G."},{"full_name":"Maeda, Takafumi","last_name":"Maeda","first_name":"Takafumi"},{"first_name":"Peter","full_name":"Bornmann, Peter","last_name":"Bornmann"},{"first_name":"Tobias","last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210"},{"first_name":"Takeshi","last_name":"Morita","full_name":"Morita, Takeshi"}],"date_created":"2019-05-20T13:10:14Z","volume":61,"title":"Synthesis of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal method and properties of sintered (K0.48Na0.52)NBO3 ceramics","doi":"10.1109/TUFFC.2014.6722608"},{"publication":"Review of Quantitative Finance and Accounting (VHB-JOURQUAL 3 Ranking B)","abstract":[{"text":"This article examines and extends research on the relation between the capital asset pricing model market beta, accounting risk measures and macroeconomic risk factors. We employ a beta decomposition approach that nests competing models with different business risk proxies and allows to frame cross-model comparison. Because model tests require estimated independent variables resulting in measurement error, we empirically estimate three comparable model specifications with instrumental variable estimators and for the first time provide thorough instrument diagnostics in this setting. Correcting for the heretofore neglected weak instruments problem we find that growth risk (i.e., the risk of firm sales variations that are inconsistent with the market wide trends), is the business risk that explains cross-sectional variations in market beta best.","lang":"eng"}],"keyword":["CAPM","Cost of capital","Accounting beta","Intrinsic business risk","Growth risk","Instrumental variables"],"language":[{"iso":"eng"}],"quality_controlled":"1","issue":"3","year":"2013","date_created":"2021-01-05T09:28:36Z","title":"Determinants of market beta: the impacts of firm-specific accounting figures and market conditions","type":"journal_article","status":"public","_id":"20863","department":[{"_id":"275"}],"user_id":"46447","article_type":"original","extern":"1","publication_identifier":{"issn":["0924-865X","1573-7179"]},"publication_status":"published","page":"535-570","jel":["C36","G11","G12"],"citation":{"mla":"Schlueter, Tobias, and Sönke Sievers. “Determinants of Market Beta: The Impacts of Firm-Specific Accounting Figures and Market Conditions.” <i>Review of Quantitative Finance and Accounting (VHB-JOURQUAL 3 Ranking B)</i>, no. 3, 2013, pp. 535–70, doi:<a href=\"https://doi.org/10.1007/s11156-013-0352-1\">10.1007/s11156-013-0352-1</a>.","short":"T. Schlueter, S. Sievers, Review of Quantitative Finance and Accounting (VHB-JOURQUAL 3 Ranking B) (2013) 535–570.","bibtex":"@article{Schlueter_Sievers_2013, title={Determinants of market beta: the impacts of firm-specific accounting figures and market conditions}, DOI={<a href=\"https://doi.org/10.1007/s11156-013-0352-1\">10.1007/s11156-013-0352-1</a>}, number={3}, journal={Review of Quantitative Finance and Accounting (VHB-JOURQUAL 3 Ranking B)}, author={Schlueter, Tobias and Sievers, Sönke}, year={2013}, pages={535–570} }","apa":"Schlueter, T., &#38; Sievers, S. (2013). Determinants of market beta: the impacts of firm-specific accounting figures and market conditions. <i>Review of Quantitative Finance and Accounting (VHB-JOURQUAL 3 Ranking B)</i>, (3), 535–570. <a href=\"https://doi.org/10.1007/s11156-013-0352-1\">https://doi.org/10.1007/s11156-013-0352-1</a>","ama":"Schlueter T, Sievers S. Determinants of market beta: the impacts of firm-specific accounting figures and market conditions. <i>Review of Quantitative Finance and Accounting (VHB-JOURQUAL 3 Ranking B)</i>. 2013;(3):535-570. doi:<a href=\"https://doi.org/10.1007/s11156-013-0352-1\">10.1007/s11156-013-0352-1</a>","chicago":"Schlueter, Tobias, and Sönke Sievers. “Determinants of Market Beta: The Impacts of Firm-Specific Accounting Figures and Market Conditions.” <i>Review of Quantitative Finance and Accounting (VHB-JOURQUAL 3 Ranking B)</i>, no. 3 (2013): 535–70. <a href=\"https://doi.org/10.1007/s11156-013-0352-1\">https://doi.org/10.1007/s11156-013-0352-1</a>.","ieee":"T. Schlueter and S. Sievers, “Determinants of market beta: the impacts of firm-specific accounting figures and market conditions,” <i>Review of Quantitative Finance and Accounting (VHB-JOURQUAL 3 Ranking B)</i>, no. 3, pp. 535–570, 2013."},"date_updated":"2022-01-06T06:54:41Z","author":[{"last_name":"Schlueter","full_name":"Schlueter, Tobias","first_name":"Tobias"},{"first_name":"Sönke","last_name":"Sievers","id":"46447","full_name":"Sievers, Sönke"}],"doi":"10.1007/s11156-013-0352-1","main_file_link":[{"url":"https://link.springer.com/article/10.1007/s11156-013-0352-1"}]},{"type":"journal_article","status":"public","user_id":"46447","department":[{"_id":"275"}],"_id":"5108","extern":"1","article_type":"original","publication_status":"published","jel":["G31","G32","H21","H25"],"citation":{"ama":"Kreutzmann D, Sievers S, Mueller C. Investment distortions and the value of the government’s tax claim. <i>Applied Financial Economics (VHB-JOURQUAL 3 Ranking C)</i>. 2013;23(11):977-989. doi:<a href=\"https://doi.org/10.1080/09603107.2013.786161\">10.1080/09603107.2013.786161</a>","ieee":"D. Kreutzmann, S. Sievers, and C. Mueller, “Investment distortions and the value of the government’s tax claim,” <i>Applied Financial Economics (VHB-JOURQUAL 3 Ranking C)</i>, vol. 23, no. 11, pp. 977–989, 2013.","chicago":"Kreutzmann, Daniel, Sönke Sievers, and Christian Mueller. “Investment Distortions and the Value of the Government’s Tax Claim.” <i>Applied Financial Economics (VHB-JOURQUAL 3 Ranking C)</i> 23, no. 11 (2013): 977–89. <a href=\"https://doi.org/10.1080/09603107.2013.786161\">https://doi.org/10.1080/09603107.2013.786161</a>.","apa":"Kreutzmann, D., Sievers, S., &#38; Mueller, C. (2013). Investment distortions and the value of the government’s tax claim. <i>Applied Financial Economics (VHB-JOURQUAL 3 Ranking C)</i>, <i>23</i>(11), 977–989. <a href=\"https://doi.org/10.1080/09603107.2013.786161\">https://doi.org/10.1080/09603107.2013.786161</a>","bibtex":"@article{Kreutzmann_Sievers_Mueller_2013, title={Investment distortions and the value of the government’s tax claim}, volume={23}, DOI={<a href=\"https://doi.org/10.1080/09603107.2013.786161\">10.1080/09603107.2013.786161</a>}, number={11}, journal={Applied Financial Economics (VHB-JOURQUAL 3 Ranking C)}, publisher={Taylor \\&#38; Francis}, author={Kreutzmann, Daniel and Sievers, Sönke and Mueller, Christian}, year={2013}, pages={977–989} }","short":"D. Kreutzmann, S. Sievers, C. Mueller, Applied Financial Economics (VHB-JOURQUAL 3 Ranking C) 23 (2013) 977–989.","mla":"Kreutzmann, Daniel, et al. “Investment Distortions and the Value of the Government’s Tax Claim.” <i>Applied Financial Economics (VHB-JOURQUAL 3 Ranking C)</i>, vol. 23, no. 11, Taylor \\&#38; Francis, 2013, pp. 977–89, doi:<a href=\"https://doi.org/10.1080/09603107.2013.786161\">10.1080/09603107.2013.786161</a>."},"intvolume":"        23","page":"977-989","author":[{"first_name":"Daniel","full_name":"Kreutzmann, Daniel","last_name":"Kreutzmann"},{"id":"46447","full_name":"Sievers, Sönke","last_name":"Sievers","first_name":"Sönke"},{"first_name":"Christian","last_name":"Mueller","full_name":"Mueller, Christian"}],"volume":23,"date_updated":"2022-01-06T07:01:38Z","main_file_link":[{"url":"https://www.tandfonline.com/doi/full/10.1080/09603107.2013.786161#.VE5YmBZwmAd"}],"doi":"10.1080/09603107.2013.786161","publication":"Applied Financial Economics (VHB-JOURQUAL 3 Ranking C)","abstract":[{"text":"This study integrates the government in the context of company valuation. Our framework allows to analyze and to quantify the risk-sharing effects and conflicts of interest between the government and the shareholders when firms follow different financial policies. We provide novel evidence that firms with fixed future levels of debt might invest more than socially desirable. Economically, this happens if the gain in tax-shields is big enough to outweigh the loss in the unlevered firm value. Our findings have implications for the practice of investment subsidy programs provided by the government to avoid fostering investments beyond the socially optimal level. ","lang":"eng"}],"language":[{"iso":"eng"}],"keyword":["corporate tax claim","company valuation","optimal investment","cost of capital"],"issue":"11","year":"2013","date_created":"2018-10-31T07:50:58Z","publisher":"Taylor \\& Francis","title":"Investment distortions and the value of the government's tax claim"},{"author":[{"last_name":"Kosi","id":"54068","full_name":"Kosi, Urska","first_name":"Urska"},{"first_name":"Jerney","full_name":"Koren, Jerney","last_name":"Koren"},{"first_name":"Aljosa","full_name":"Valentincic, Aljosa","last_name":"Valentincic"}],"date_created":"2023-01-17T13:25:30Z","date_updated":"2023-01-17T13:51:24Z","conference":{"start_date":"2013-05-02","name":"36th Annual Congress of European Accounting Association","location":"Paris, France","end_date":"2013-05-05"},"main_file_link":[{"url":"https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2373987"}],"title":"Does Financial Statement Audit Reduce the Cost of Debt of Private Firms?","citation":{"apa":"Kosi, U., Koren, J., &#38; Valentincic, A. (2013). <i>Does Financial Statement Audit Reduce the Cost of Debt of Private Firms?</i> 36th Annual Congress of European Accounting Association, Paris, France.","short":"U. Kosi, J. Koren, A. Valentincic, in: 2013.","mla":"Kosi, Urska, et al. <i>Does Financial Statement Audit Reduce the Cost of Debt of Private Firms?</i> 2013.","bibtex":"@inproceedings{Kosi_Koren_Valentincic_2013, title={Does Financial Statement Audit Reduce the Cost of Debt of Private Firms?}, author={Kosi, Urska and Koren, Jerney and Valentincic, Aljosa}, year={2013} }","ama":"Kosi U, Koren J, Valentincic A. Does Financial Statement Audit Reduce the Cost of Debt of Private Firms? In: ; 2013.","chicago":"Kosi, Urska, Jerney Koren, and Aljosa Valentincic. “Does Financial Statement Audit Reduce the Cost of Debt of Private Firms?,” 2013.","ieee":"U. Kosi, J. Koren, and A. Valentincic, “Does Financial Statement Audit Reduce the Cost of Debt of Private Firms?,” presented at the 36th Annual Congress of European Accounting Association, Paris, France, 2013."},"year":"2013","department":[{"_id":"635"},{"_id":"186"},{"_id":"551"}],"user_id":"88603","_id":"37109","language":[{"iso":"eng"}],"extern":"1","keyword":["private firms","voluntary audit","cost of debt","self-selection bias","lemon problem"],"type":"conference","status":"public","abstract":[{"lang":"eng","text":"This study examines the effect of audit on private firms’ cost of debt. We use a sample of 1,949 small private firms operating in the period 2006-2010 with optional financial statement audit. High quality data allows us to construct a more precise interest rate measure than existing studies employ. After controlling for obvious sources of demand for voluntary audits (ownership complexity, subsidiary status, bank relations), we find a robust central result that voluntary audits increase rather than decrease the cost of debt financing, contrary to several existing studies. This finding indicates that voluntary audits are generally treated as “adopting a label” and penalised by creditors, regardless of the perceived auditor quality as a result of the lemon problem in the audit market. Even Big-4 audits increase the cost of debt, likely as a result due to the lemon problem in the audit market, although the increase is smaller than for non-Big-4 audits. The results are sensitive to the estimation method used (OLS, Heckman’s two-step, PSM) and (sub-)sample selection. We show that disregarding the underlying assumptions of these estimation methods may lead to incorrect inferences. Additional analyses show that audited firms’ reported earnings are less informative about future operating performance than earnings of their unaudited counterparts. Our results also indicate that results are sensitive to cost of debt definition and this might have affected the results reported in the existing literature."}]},{"year":"2012","page":"194-195","citation":{"apa":"Maeda, T., Bornmann, P., Hemsel, T., &#38; Morita, T. (2012). Piezoelectric applications of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics. In <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i> (pp. 194–195). <a href=\"https://doi.org/10.1109/ULTSYM.2012.0048\">https://doi.org/10.1109/ULTSYM.2012.0048</a>","mla":"Maeda, Takafumi, et al. “Piezoelectric Applications of Hydrothermal Lead-Free (K0.48Na0.52)NbO3 Ceramics.” <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>, 2012, pp. 194–95, doi:<a href=\"https://doi.org/10.1109/ULTSYM.2012.0048\">10.1109/ULTSYM.2012.0048</a>.","short":"T. Maeda, P. Bornmann, T. Hemsel, T. Morita, in: Ultrasonics Symposium (IUS), 2012 IEEE International, 2012, pp. 194–195.","bibtex":"@inproceedings{Maeda_Bornmann_Hemsel_Morita_2012, title={Piezoelectric applications of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics}, DOI={<a href=\"https://doi.org/10.1109/ULTSYM.2012.0048\">10.1109/ULTSYM.2012.0048</a>}, booktitle={Ultrasonics Symposium (IUS), 2012 IEEE International}, author={Maeda, Takafumi and Bornmann, Peter and Hemsel, Tobias and Morita, Takeshi}, year={2012}, pages={194–195} }","ama":"Maeda T, Bornmann P, Hemsel T, Morita T. Piezoelectric applications of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics. In: <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>. ; 2012:194-195. doi:<a href=\"https://doi.org/10.1109/ULTSYM.2012.0048\">10.1109/ULTSYM.2012.0048</a>","ieee":"T. Maeda, P. Bornmann, T. Hemsel, and T. Morita, “Piezoelectric applications of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics,” in <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>, 2012, pp. 194–195.","chicago":"Maeda, Takafumi, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Piezoelectric Applications of Hydrothermal Lead-Free (K0.48Na0.52)NbO3 Ceramics.” In <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>, 194–95, 2012. <a href=\"https://doi.org/10.1109/ULTSYM.2012.0048\">https://doi.org/10.1109/ULTSYM.2012.0048</a>."},"publication_identifier":{"issn":["1948-5719"]},"quality_controlled":"1","title":"Piezoelectric applications of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics","doi":"10.1109/ULTSYM.2012.0048","date_updated":"2022-01-06T07:04:20Z","date_created":"2019-05-13T13:28:05Z","author":[{"last_name":"Maeda","full_name":"Maeda, Takafumi","first_name":"Takafumi"},{"first_name":"Peter","last_name":"Bornmann","full_name":"Bornmann, Peter"},{"first_name":"Tobias","id":"210","full_name":"Hemsel, Tobias","last_name":"Hemsel"},{"last_name":"Morita","full_name":"Morita, Takeshi","first_name":"Takeshi"}],"abstract":[{"lang":"eng","text":"A hydrothermal method utilizes a crystallization process in the solution so that the pure and high-quality powders can be realized. Sintering from the hydrothermal KNbO3 and NaNbO3 powders, a high-dense lead-free piezoelectric (K,Na)NbO3 ceramics could be obtained (density: 98.8\\%). Concerning about the g33 constant, high value as large as commercial PZT ceramics was measured. Therefore, the hydrothermal (K,Na)NbO3 ceramics is usable for the sensors and the energy harvesting devices. To demonstrate the (K,Na)NbO3 ceramics, a hydrophone sensor was fabricated and evaluated."}],"status":"public","publication":"Ultrasonics Symposium (IUS), 2012 IEEE International","type":"conference","keyword":["crystallisation","hydrophones","piezoceramics","potassium compounds","powder technology","powders","sensors","sintering","sodium compounds","(K0.48Na0.52)NbO3","KNbO3 powder","NaNbO3 powder","crystallization","energy harvesting devices","g33 constant","hydrophone sensor","hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics","hydrothermal method","piezoelectric applications","sintering","Materials","Transducers"],"language":[{"iso":"eng"}],"_id":"9788","department":[{"_id":"151"}],"user_id":"55222"},{"status":"public","abstract":[{"lang":"eng","text":"This paper proposes a quality driven, simulation based approach to functional design verification, which applies mainly to IP-level HDL designs with well specified test instruction format and is evaluated on a soft microprocessor core MB-LITE [5]. The approach utilizes mutation analysis as the quality metric to steer an automated simulation data generation process. It leads to a simulation flow with two phases towards an enhanced mutation analysis result. First in a random simulation phase, an in-loop heuristics is deployed and adjusts dynamically the test probability distribution so as to improve the coverage efficiency. Next, for each remaining hard-to-kill mutant, a search heuristics on test input space is developed to iteratively locate a target test, using a specific objective cost function for the goal of killing HDL mutant. The effectiveness of this integrated two-phase simulation flow is demonstrated by the results with the MB-LITE microprocessor IP."}],"publication":"Proceedings of SOCC2012","type":"conference","language":[{"iso":"eng"}],"keyword":["Analytical models","Hardware design languages","Microprocessors","Cost function","Data models","Search problems","IP networks"],"department":[{"_id":"672"}],"user_id":"5786","_id":"36994","citation":{"ama":"Xie T, Müller W, Letombe F. Mutation-Analysis Driven Functional Verification of a Soft Microprocessor. In: <i>Proceedings of SOCC2012</i>. IEEE; 2012. doi:<a href=\"https://doi.org/10.1109/SOCC.2012.6398362\">10.1109/SOCC.2012.6398362</a>","ieee":"T. Xie, W. Müller, and F. Letombe, “Mutation-Analysis Driven Functional Verification of a Soft Microprocessor,” 2012, doi: <a href=\"https://doi.org/10.1109/SOCC.2012.6398362\">10.1109/SOCC.2012.6398362</a>.","chicago":"Xie, Tao , Wolfgang Müller, and Florian Letombe. “Mutation-Analysis Driven Functional Verification of a Soft Microprocessor.” In <i>Proceedings of SOCC2012</i>.  Niagara Falls, NY, USA : IEEE, 2012. <a href=\"https://doi.org/10.1109/SOCC.2012.6398362\">https://doi.org/10.1109/SOCC.2012.6398362</a>.","apa":"Xie, T., Müller, W., &#38; Letombe, F. (2012). Mutation-Analysis Driven Functional Verification of a Soft Microprocessor. <i>Proceedings of SOCC2012</i>. <a href=\"https://doi.org/10.1109/SOCC.2012.6398362\">https://doi.org/10.1109/SOCC.2012.6398362</a>","mla":"Xie, Tao, et al. “Mutation-Analysis Driven Functional Verification of a Soft Microprocessor.” <i>Proceedings of SOCC2012</i>, IEEE, 2012, doi:<a href=\"https://doi.org/10.1109/SOCC.2012.6398362\">10.1109/SOCC.2012.6398362</a>.","bibtex":"@inproceedings{Xie_Müller_Letombe_2012, place={ Niagara Falls, NY, USA }, title={Mutation-Analysis Driven Functional Verification of a Soft Microprocessor}, DOI={<a href=\"https://doi.org/10.1109/SOCC.2012.6398362\">10.1109/SOCC.2012.6398362</a>}, booktitle={Proceedings of SOCC2012}, publisher={IEEE}, author={Xie, Tao  and Müller, Wolfgang and Letombe, Florian}, year={2012} }","short":"T. Xie, W. Müller, F. Letombe, in: Proceedings of SOCC2012, IEEE,  Niagara Falls, NY, USA , 2012."},"place":" Niagara Falls, NY, USA ","year":"2012","publication_identifier":{"eisbn":["978-1-4673-1295-0"]},"doi":"10.1109/SOCC.2012.6398362","title":"Mutation-Analysis Driven Functional Verification of a Soft Microprocessor","date_created":"2023-01-17T08:46:14Z","author":[{"first_name":"Tao ","full_name":"Xie, Tao ","last_name":"Xie"},{"last_name":"Müller","id":"16243","full_name":"Müller, Wolfgang","first_name":"Wolfgang"},{"full_name":"Letombe, Florian","last_name":"Letombe","first_name":"Florian"}],"date_updated":"2023-01-17T08:46:29Z","publisher":"IEEE"}]