--- _id: '59510' abstract: - lang: eng text: The use of organo-catalysis in continuous-flow reactor systems is gaining attention in medicinal chemistry due to its cost-effectiveness and reduced chemical waste. In this study, bioactive curcumin (CUM) derivatives were synthesized in a continuously operated microfluidic reactor (MFR), using piperidine-based polymeric networks as catalysts. Piperidine methacrylate and piperidine acrylate were synthesized and subsequently copolymerized with complementary monomers (MMA or DMAA) and crosslinkers (EGDMA or MBAM) via photopolymerization, yielding different polymeric networks. Initially, batch reactions were optimized for the organo-catalytic Knoevenagel condensation between CUM and 4-nitrobenzaldehyde, under various conditions, in the presence of polymer networks. Conversion was assessed using offline 1H NMR spectroscopy, revealing an increase in conversion with enhanced swelling properties of the polymer networks, which facilitated greater accessibility of catalytic sites. In continuous-flow MFR experiments, optimized polymer gel dots exhibited superior catalytic performance, achieving a conversion of up to 72%, compared to other compositions. This improvement was attributed to the enhanced swelling in the reaction mixture (DMSO/methanol, 7:3 v/v) at 40 °C over 72 h. Furthermore, the MFR system enabled the efficient synthesis of a series of CUM derivatives, demonstrating significantly higher conversion rates than traditional batch reactions. Notably, while batch reactions required 90% catalyst loading in the gel, the MFR system achieved a comparable or superior performance with only 50% catalyst, resulting in a higher turnover number. These findings underscore the advantages of continuous-flow organo-catalysis in enhancing catalytic efficiency and sustainability in organic synthesis. article_number: '278' author: - first_name: Naresh full_name: Killi, Naresh last_name: Killi - first_name: Katja full_name: Rumpke, Katja last_name: Rumpke - first_name: Dirk full_name: Kuckling, Dirk id: '287' last_name: Kuckling citation: ama: Killi N, Rumpke K, Kuckling D. Synthesis of Curcumin Derivatives via Knoevenagel Reaction Within a Continuously Driven Microfluidic Reactor Using Polymeric Networks Containing Piperidine as a Catalyst. Gels. 2025;11(4). doi:10.3390/gels11040278 apa: Killi, N., Rumpke, K., & Kuckling, D. (2025). Synthesis of Curcumin Derivatives via Knoevenagel Reaction Within a Continuously Driven Microfluidic Reactor Using Polymeric Networks Containing Piperidine as a Catalyst. Gels, 11(4), Article 278. https://doi.org/10.3390/gels11040278 bibtex: '@article{Killi_Rumpke_Kuckling_2025, title={Synthesis of Curcumin Derivatives via Knoevenagel Reaction Within a Continuously Driven Microfluidic Reactor Using Polymeric Networks Containing Piperidine as a Catalyst}, volume={11}, DOI={10.3390/gels11040278}, number={4278}, journal={Gels}, publisher={MDPI AG}, author={Killi, Naresh and Rumpke, Katja and Kuckling, Dirk}, year={2025} }' chicago: Killi, Naresh, Katja Rumpke, and Dirk Kuckling. “Synthesis of Curcumin Derivatives via Knoevenagel Reaction Within a Continuously Driven Microfluidic Reactor Using Polymeric Networks Containing Piperidine as a Catalyst.” Gels 11, no. 4 (2025). https://doi.org/10.3390/gels11040278. ieee: 'N. Killi, K. Rumpke, and D. Kuckling, “Synthesis of Curcumin Derivatives via Knoevenagel Reaction Within a Continuously Driven Microfluidic Reactor Using Polymeric Networks Containing Piperidine as a Catalyst,” Gels, vol. 11, no. 4, Art. no. 278, 2025, doi: 10.3390/gels11040278.' mla: Killi, Naresh, et al. “Synthesis of Curcumin Derivatives via Knoevenagel Reaction Within a Continuously Driven Microfluidic Reactor Using Polymeric Networks Containing Piperidine as a Catalyst.” Gels, vol. 11, no. 4, 278, MDPI AG, 2025, doi:10.3390/gels11040278. short: N. Killi, K. Rumpke, D. Kuckling, Gels 11 (2025). date_created: 2025-04-11T07:12:02Z date_updated: 2025-04-11T07:13:26Z department: - _id: '163' doi: 10.3390/gels11040278 intvolume: ' 11' issue: '4' keyword: - flow chemistry - heterogeneous catalysis - sustainable synthesis - organo-catalysis - polymeric gel dots language: - iso: eng main_file_link: - url: https://www.mdpi.com/2310-2861/11/4/278 publication: Gels publication_identifier: issn: - 2310-2861 publication_status: published publisher: MDPI AG status: public title: Synthesis of Curcumin Derivatives via Knoevenagel Reaction Within a Continuously Driven Microfluidic Reactor Using Polymeric Networks Containing Piperidine as a Catalyst type: journal_article user_id: '94' volume: 11 year: '2025' ... --- _id: '59907' abstract: - lang: eng text: Abstract. Flow forming is recognized for its precision in producing rotationally symmetric components, but the use of metastable austenitic stainless steel (AISI 304L) introduces challenges due to uncontrolled strain-induced α’ martensite formation. Variations in factors such as eccentricity and batch inconsistencies lead to unpredictable microstructural profiles, limiting reproducibility [1,2]. This study addresses these issues by incorporating thermal actuators for cryogenic cooling and induction heating to regulate forming temperatures, enabling control of the α’-martensite content. Experimental investigations demonstrate that local tempering during thermomechanical reverse flow forming produces discernible variations in microstructure, affecting mechanical and magnetic properties [3]. Controlled local adjustments of α’-martensite content allow for customization of properties in seamless tubes, advancing manufacturing capabilities for complex, defect-free components. The results presented demonstrate promising strategies for implementation within the context of closed-loop property control in flow forming. author: - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Frank full_name: Walther, Frank last_name: Walther citation: ama: 'Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J, Walther F. Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties. In: Carlone P, Filice L, Umbrello D, eds. Materials Research Proceedings. Vol 54. Materials Research Forum LLC; 2025. doi:10.21741/9781644903599-127' apa: 'Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., & Walther, F. (2025). Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties. In P. Carlone, L. Filice, & D. Umbrello (Eds.), Materials Research Proceedings (Vol. 54). Materials Research Forum LLC. https://doi.org/10.21741/9781644903599-127' bibtex: '@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_Walther_2025, title={Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties}, volume={54}, DOI={10.21741/9781644903599-127}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Arian, Bahman and Homberg, Werner and Kersting, Lukas and Trächtler, Ansgar and Rozo Vasquez, Julian and Walther, Frank}, editor={Carlone, Pierpaolo and Filice, Luigino and Umbrello, Domenico}, year={2025} }' chicago: 'Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian Rozo Vasquez, and Frank Walther. “Advanced Thermomechanical Flow Forming: A Novel Approach to α’-Martensite Control for Enhanced Material Properties.” In Materials Research Proceedings, edited by Pierpaolo Carlone, Luigino Filice, and Domenico Umbrello, Vol. 54. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-127.' ieee: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, and F. Walther, “Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties,” in Materials Research Proceedings, Paestum, Italy, 2025, vol. 54, doi: 10.21741/9781644903599-127.' mla: 'Arian, Bahman, et al. “Advanced Thermomechanical Flow Forming: A Novel Approach to α’-Martensite Control for Enhanced Material Properties.” Materials Research Proceedings, edited by Pierpaolo Carlone et al., vol. 54, Materials Research Forum LLC, 2025, doi:10.21741/9781644903599-127.' short: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther, in: P. Carlone, L. Filice, D. Umbrello (Eds.), Materials Research Proceedings, Materials Research Forum LLC, 2025.' conference: end_date: 2025-05-09 location: Paestum, Italy name: The 28th International ESAFORM Conference on Material Forming - ESAFORM 2025 start_date: 2025-05-06 date_created: 2025-05-15T06:59:28Z date_updated: 2025-10-30T13:55:08Z department: - _id: '156' - _id: '153' - _id: '241' doi: 10.21741/9781644903599-127 editor: - first_name: Pierpaolo full_name: Carlone, Pierpaolo last_name: Carlone - first_name: Luigino full_name: Filice, Luigino last_name: Filice - first_name: Domenico full_name: Umbrello, Domenico last_name: Umbrello has_accepted_license: '1' intvolume: ' 54' keyword: - Flow Forming - Thermomechanical Forming - α’-Martensite - Property Control language: - iso: eng main_file_link: - open_access: '1' url: https://mrforum.com/product/9781644903599-127/ oa: '1' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: 'Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties' type: conference user_id: '36287' volume: 54 year: '2025' ... --- _id: '51122' article_number: '103993' article_type: original author: - first_name: Abbas J.S. full_name: Al-Lami, Abbas J.S. last_name: Al-Lami - first_name: Eugeny Y. full_name: Kenig, Eugeny Y. last_name: Kenig citation: ama: Al-Lami AJS, Kenig EY. New pressure drop and heat transfer correlations for turbulent forced convection in internally channeled tube heat exchanger ducts. Case Studies in Thermal Engineering. Published online 2024. doi:10.1016/j.csite.2024.103993 apa: Al-Lami, A. J. S., & Kenig, E. Y. (2024). New pressure drop and heat transfer correlations for turbulent forced convection in internally channeled tube heat exchanger ducts. Case Studies in Thermal Engineering, Article 103993. https://doi.org/10.1016/j.csite.2024.103993 bibtex: '@article{Al-Lami_Kenig_2024, title={New pressure drop and heat transfer correlations for turbulent forced convection in internally channeled tube heat exchanger ducts}, DOI={10.1016/j.csite.2024.103993}, number={103993}, journal={Case Studies in Thermal Engineering}, publisher={Elsevier BV}, author={Al-Lami, Abbas J.S. and Kenig, Eugeny Y.}, year={2024} }' chicago: Al-Lami, Abbas J.S., and Eugeny Y. Kenig. “New Pressure Drop and Heat Transfer Correlations for Turbulent Forced Convection in Internally Channeled Tube Heat Exchanger Ducts.” Case Studies in Thermal Engineering, 2024. https://doi.org/10.1016/j.csite.2024.103993. ieee: 'A. J. S. Al-Lami and E. Y. Kenig, “New pressure drop and heat transfer correlations for turbulent forced convection in internally channeled tube heat exchanger ducts,” Case Studies in Thermal Engineering, Art. no. 103993, 2024, doi: 10.1016/j.csite.2024.103993.' mla: Al-Lami, Abbas J. S., and Eugeny Y. Kenig. “New Pressure Drop and Heat Transfer Correlations for Turbulent Forced Convection in Internally Channeled Tube Heat Exchanger Ducts.” Case Studies in Thermal Engineering, 103993, Elsevier BV, 2024, doi:10.1016/j.csite.2024.103993. short: A.J.S. Al-Lami, E.Y. Kenig, Case Studies in Thermal Engineering (2024). date_created: 2024-02-04T17:36:04Z date_updated: 2024-03-09T08:33:11Z doi: 10.1016/j.csite.2024.103993 keyword: - Fluid Flow and Transfer Processes - Engineering (miscellaneous) language: - iso: eng main_file_link: - open_access: '1' oa: '1' publication: Case Studies in Thermal Engineering publication_identifier: issn: - 2214-157X publication_status: published publisher: Elsevier BV quality_controlled: '1' status: public title: New pressure drop and heat transfer correlations for turbulent forced convection in internally channeled tube heat exchanger ducts type: journal_article user_id: '81772' year: '2024' ... --- _id: '43457' abstract: - lang: eng text: The production of hydrogen and the utilization of biomass for sustainable concepts of energy conversion and storage require gas sensors that discriminate between hydrogen (H2) and carbon monoxide (CO). Mesoporous copper–ceria (Cu–CeO2) materials with large specific surface areas and uniform porosity are prepared by nanocasting, and their textural properties are characterized by N2 physisorption, powder XRD, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The oxidation states of copper (Cu+, Cu2+) and cerium (Ce3+, Ce4+) are investigated by XPS. The materials are used as resistive gas sensors for H2 and CO. The sensors show a stronger response to CO than to H2 and low cross-sensitivity to humidity. Copper turns out to be a necessary component; copper-free ceria materials prepared by the same method show only poor sensing performance. By measuring both gases (CO and H2) simultaneously, it is shown that this behavior can be utilized for selective sensing of CO in the presence of H2. author: - first_name: Dominik full_name: Baier, Dominik last_name: Baier - first_name: Tatiana full_name: Priamushko, Tatiana last_name: Priamushko - first_name: Christian full_name: Weinberger, Christian id: '11848' last_name: Weinberger - first_name: Freddy full_name: Kleitz, Freddy last_name: Kleitz - first_name: Michael full_name: Tiemann, Michael id: '23547' last_name: Tiemann orcid: 0000-0003-1711-2722 citation: ama: Baier D, Priamushko T, Weinberger C, Kleitz F, Tiemann M. Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors. ACS Sensors. 2023;8(4):1616-1623. doi:10.1021/acssensors.2c02739 apa: Baier, D., Priamushko, T., Weinberger, C., Kleitz, F., & Tiemann, M. (2023). Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors. ACS Sensors, 8(4), 1616–1623. https://doi.org/10.1021/acssensors.2c02739 bibtex: '@article{Baier_Priamushko_Weinberger_Kleitz_Tiemann_2023, title={Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors}, volume={8}, DOI={10.1021/acssensors.2c02739}, number={4}, journal={ACS Sensors}, publisher={American Chemical Society (ACS)}, author={Baier, Dominik and Priamushko, Tatiana and Weinberger, Christian and Kleitz, Freddy and Tiemann, Michael}, year={2023}, pages={1616–1623} }' chicago: 'Baier, Dominik, Tatiana Priamushko, Christian Weinberger, Freddy Kleitz, and Michael Tiemann. “Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors.” ACS Sensors 8, no. 4 (2023): 1616–23. https://doi.org/10.1021/acssensors.2c02739.' ieee: 'D. Baier, T. Priamushko, C. Weinberger, F. Kleitz, and M. Tiemann, “Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors,” ACS Sensors, vol. 8, no. 4, pp. 1616–1623, 2023, doi: 10.1021/acssensors.2c02739.' mla: Baier, Dominik, et al. “Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors.” ACS Sensors, vol. 8, no. 4, American Chemical Society (ACS), 2023, pp. 1616–23, doi:10.1021/acssensors.2c02739. short: D. Baier, T. Priamushko, C. Weinberger, F. Kleitz, M. Tiemann, ACS Sensors 8 (2023) 1616–1623. date_created: 2023-04-12T06:52:34Z date_updated: 2023-05-01T05:47:53Z department: - _id: '35' - _id: '2' - _id: '307' doi: 10.1021/acssensors.2c02739 intvolume: ' 8' issue: '4' keyword: - Fluid Flow and Transfer Processes - Process Chemistry and Technology - Instrumentation - Bioengineering language: - iso: eng page: 1616 - 1623 publication: ACS Sensors publication_identifier: issn: - 2379-3694 - 2379-3694 publication_status: published publisher: American Chemical Society (ACS) quality_controlled: '1' status: public title: Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors type: journal_article user_id: '23547' volume: 8 year: '2023' ... --- _id: '34223' abstract: - lang: eng text: In this study, quasi-unidirectional continuous fiber reinforced thermoplastics (CFRTs) are joined with metal sheets via cold formed cylindrical, elliptical and polygonal pin structures which are directly pressed into the CFRT component after local infrared heating. In comparison to already available studies, the unique novelty is the use of non-rotational symmetric pin structures for the CFRT/metal hybrid joining. Thus, a variation in the fiber orientation in the CFRT component as well as a variation in the non-rotational symmetric pins’ orientation in relation to the sample orientation is conducted. The created samples are consequently mechanically tested via single lap shear experiments in a quasi-static state. Finally, the failure behavior of the single lap shear samples is investigated with the help of microscopic images and detailed photographs. In the single lap shear tests, it could be shown that non-rotational symmetric pin structures lead to an increase in maximum testing forces of up to 74% when compared to cylindrical pins. However, when normalized to the pin foot print related joint strength, only one polygonal pin variation showed increased joint strength in comparison to cylindrical pin structures. The investigation of the failure behavior showed two distinct failure modes. The first failure mode was failure of the CFRT component due to an exceedance of the maximum bearing strength of the pin-hole leading to significant damage in the CFRT component. The second failure mode was pin-deflection due to the applied testing load and a subsequent pin extraction from the CFRT component resulting in significantly less visible damage in the CFRT component. Generally, CFRT failure is more likely with a fiber orientation of 0° in relation to the load direction while pin extraction typically occurs with a fiber orientation of 90°. It is assumed that for future investigations, pin structures with an undercutting shape that creates an interlocking joint could counteract the tendency for pin-extraction and consequently lead to increased maximum joint strengths. article_number: '4962' author: - first_name: Julian full_name: Popp, Julian last_name: Popp - first_name: David full_name: Römisch, David last_name: Römisch - first_name: Marion full_name: Merklein, Marion last_name: Merklein - first_name: Dietmar full_name: Drummer, Dietmar last_name: Drummer citation: ama: Popp J, Römisch D, Merklein M, Drummer D. Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures. Applied Sciences. 2022;12(10). doi:10.3390/app12104962 apa: Popp, J., Römisch, D., Merklein, M., & Drummer, D. (2022). Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures. Applied Sciences, 12(10), Article 4962. https://doi.org/10.3390/app12104962 bibtex: '@article{Popp_Römisch_Merklein_Drummer_2022, title={Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures}, volume={12}, DOI={10.3390/app12104962}, number={104962}, journal={Applied Sciences}, publisher={MDPI AG}, author={Popp, Julian and Römisch, David and Merklein, Marion and Drummer, Dietmar}, year={2022} }' chicago: Popp, Julian, David Römisch, Marion Merklein, and Dietmar Drummer. “Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures.” Applied Sciences 12, no. 10 (2022). https://doi.org/10.3390/app12104962. ieee: 'J. Popp, D. Römisch, M. Merklein, and D. Drummer, “Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures,” Applied Sciences, vol. 12, no. 10, Art. no. 4962, 2022, doi: 10.3390/app12104962.' mla: Popp, Julian, et al. “Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures.” Applied Sciences, vol. 12, no. 10, 4962, MDPI AG, 2022, doi:10.3390/app12104962. short: J. Popp, D. Römisch, M. Merklein, D. Drummer, Applied Sciences 12 (2022). date_created: 2022-12-05T21:48:01Z date_updated: 2022-12-05T21:49:30Z doi: 10.3390/app12104962 intvolume: ' 12' issue: '10' keyword: - Fluid Flow and Transfer Processes - Computer Science Applications - Process Chemistry and Technology - General Engineering - Instrumentation - General Materials Science language: - iso: eng project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '133' name: 'TRR 285 - C: TRR 285 - Project Area C' - _id: '145' name: 'TRR 285 – C01: TRR 285 - Subproject C01' publication: Applied Sciences publication_identifier: issn: - 2076-3417 publication_status: published publisher: MDPI AG status: public title: Joining of CFRT/Steel Hybrid Parts via Direct Pressing of Cold Formed Non-Rotational Symmetric Pin Structures type: journal_article user_id: '7850' volume: 12 year: '2022' ... --- _id: '30292' abstract: - lang: eng text: The spinning process is a flexible incremental forming process for the manufacturing of axially-symmetric sheet metal or tubular components with functionally graded properties. It is characterized by the utilization of universal tooling geometries and quite low forming forces. The process has a high potential to reduce material waste, to extend the forming limits and to achieve more complex geometries as well as favorable part properties [1]. Current research work at the Chair of Forming Technology (LUF) is focused on innovative flow-turning processes that have a high potential for producing flat components with excellent geometrical and mechanical properties while keeping process times short [2]. In combination with process-integrated local heat treatment, the new spinning process is predestined for the efficient forming of ultra-high-strength steel or tailored materials. Due to the desired field of food industry only food-safe materials such as special stainless steels are being investigated. This paper presents an innovative machine layout as well as an adequate process design for the production of high-performance circular knives with optimized mechanical hardness. In this context, particular attention is paid to various areas of temperature control as well as process-related challenges during the process. author: - first_name: David full_name: Engemann, David id: '51720' last_name: Engemann - first_name: Werner full_name: Homberg, Werner last_name: Homberg citation: ama: Engemann D, Homberg W. Hot Spinning of Cutting Blades for Food Industry. apa: Engemann, D., & Homberg, W. (n.d.). Hot Spinning of Cutting Blades for Food Industry. Esaform 2022, Braga - Portugal. bibtex: '@inproceedings{Engemann_Homberg, place={Braga - Portugal}, title={Hot Spinning of Cutting Blades for Food Industry}, author={Engemann, David and Homberg, Werner} }' chicago: Engemann, David, and Werner Homberg. “Hot Spinning of Cutting Blades for Food Industry.” Braga - Portugal, n.d. ieee: D. Engemann and W. Homberg, “Hot Spinning of Cutting Blades for Food Industry,” presented at the Esaform 2022, Braga - Portugal. mla: Engemann, David, and Werner Homberg. Hot Spinning of Cutting Blades for Food Industry. short: 'D. Engemann, W. Homberg, in: Braga - Portugal, n.d.' conference: end_date: 29.04.2022 location: Braga - Portugal name: Esaform 2022 start_date: 26.04.2022 date_created: 2022-03-14T07:22:43Z date_updated: 2023-04-27T09:39:21Z ddc: - '680' department: - _id: '156' file: - access_level: closed content_type: application/pdf creator: davideng date_created: 2022-03-14T07:19:21Z date_updated: 2022-03-14T07:19:21Z file_id: '30293' file_name: PaperSuperSharp_Revision.pdf file_size: 785105 relation: main_file success: 1 file_date_updated: 2022-03-14T07:19:21Z has_accepted_license: '1' keyword: - Cutting blades - Flow-forming - Incremental forming - Hot Forming - High strength steels language: - iso: eng place: Braga - Portugal publication_status: accepted quality_controlled: '1' status: public title: Hot Spinning of Cutting Blades for Food Industry type: conference user_id: '83141' year: '2022' ... --- _id: '34224' abstract: - lang: eng text: Crack growth in structures depends on the cyclic loads applied on it, such as mechanical, thermal and contact, as well as residual stresses, etc. To provide an accurate simulation of crack growth in structures, it is of high importance to integrate all kinds of loading situations in the simulations. Adapcrack3D is a simulation program that can accurately predict the propagation of cracks in real structures. However, until now, this three-dimensional program has only considered mechanical loads and static thermal loads. Therefore, the features of Adapcrack3D have been extended by including contact loading in crack growth simulations. The numerical simulation of crack propagation with Adapcrack3D is generally carried out using FE models of structures provided by the user. For simulating models with contact loading situations, Adapcrack3D has been updated to work with FE models containing multiple parts and necessary features such as coupling and surface interactions. Because Adapcrack3D uses the submodel technique for fracture mechanical evaluations, the architecture of the submodel is also modified to simulate models with contact definitions between the crack surfaces. This paper discusses the newly implemented attribute of the program with the help of illustrative examples. The results confirm that the contact simulation in Adapcrack3D is a major step in improving the functionality of the program. article_number: '7557' author: - first_name: Tintu David full_name: Joy, Tintu David id: '30821' last_name: Joy - first_name: Deborah full_name: Weiß, Deborah id: '45673' last_name: Weiß - first_name: Britta full_name: Schramm, Britta id: '4668' last_name: Schramm - first_name: Gunter full_name: Kullmer, Gunter id: '291' last_name: Kullmer citation: ama: Joy TD, Weiß D, Schramm B, Kullmer G. Further Development of 3D Crack Growth Simulation Program to Include Contact Loading Situations. Applied Sciences. 2022;12(15). doi:10.3390/app12157557 apa: Joy, T. D., Weiß, D., Schramm, B., & Kullmer, G. (2022). Further Development of 3D Crack Growth Simulation Program to Include Contact Loading Situations. Applied Sciences, 12(15), Article 7557. https://doi.org/10.3390/app12157557 bibtex: '@article{Joy_Weiß_Schramm_Kullmer_2022, title={Further Development of 3D Crack Growth Simulation Program to Include Contact Loading Situations}, volume={12}, DOI={10.3390/app12157557}, number={157557}, journal={Applied Sciences}, publisher={MDPI AG}, author={Joy, Tintu David and Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}, year={2022} }' chicago: Joy, Tintu David, Deborah Weiß, Britta Schramm, and Gunter Kullmer. “Further Development of 3D Crack Growth Simulation Program to Include Contact Loading Situations.” Applied Sciences 12, no. 15 (2022). https://doi.org/10.3390/app12157557. ieee: 'T. D. Joy, D. Weiß, B. Schramm, and G. Kullmer, “Further Development of 3D Crack Growth Simulation Program to Include Contact Loading Situations,” Applied Sciences, vol. 12, no. 15, Art. no. 7557, 2022, doi: 10.3390/app12157557.' mla: Joy, Tintu David, et al. “Further Development of 3D Crack Growth Simulation Program to Include Contact Loading Situations.” Applied Sciences, vol. 12, no. 15, 7557, MDPI AG, 2022, doi:10.3390/app12157557. short: T.D. Joy, D. Weiß, B. Schramm, G. Kullmer, Applied Sciences 12 (2022). date_created: 2022-12-05T21:49:48Z date_updated: 2023-04-27T10:13:44Z department: - _id: '143' doi: 10.3390/app12157557 intvolume: ' 12' issue: '15' keyword: - Fluid Flow and Transfer Processes - Computer Science Applications - Process Chemistry and Technology - General Engineering - Instrumentation - General Materials Science language: - iso: eng project: - _id: '130' grant_number: '418701707' name: 'TRR 285: TRR 285' - _id: '132' name: 'TRR 285 - B: TRR 285 - Project Area B' - _id: '143' name: 'TRR 285 – B04: TRR 285 - Subproject B04' publication: Applied Sciences publication_identifier: issn: - 2076-3417 publication_status: published publisher: MDPI AG quality_controlled: '1' status: public title: Further Development of 3D Crack Growth Simulation Program to Include Contact Loading Situations type: journal_article user_id: '45673' volume: 12 year: '2022' ... --- _id: '44041' article_number: '1075' author: - first_name: A. I. full_name: Ahmadov, A. I. last_name: Ahmadov - first_name: Sh. M. full_name: Nagiyev, Sh. M. last_name: Nagiyev - first_name: C. full_name: Aydin, C. last_name: Aydin - first_name: V. A. full_name: Tarverdiyeva, V. A. last_name: Tarverdiyeva - first_name: M. Sh. full_name: Orujova, M. Sh. last_name: Orujova - first_name: S. V. full_name: Badalov, S. V. last_name: Badalov citation: ama: 'Ahmadov AI, Nagiyev ShM, Aydin C, Tarverdiyeva VA, Orujova MSh, Badalov SV. Bound state solutions of Dirac equation: spin and pseudo-spin symmetry in the presence of the combined Manning–Rosen and Yukawa tensor potentials. The European Physical Journal Plus. 2022;137(9). doi:10.1140/epjp/s13360-022-03255-9' apa: 'Ahmadov, A. I., Nagiyev, Sh. M., Aydin, C., Tarverdiyeva, V. A., Orujova, M. Sh., & Badalov, S. V. (2022). Bound state solutions of Dirac equation: spin and pseudo-spin symmetry in the presence of the combined Manning–Rosen and Yukawa tensor potentials. The European Physical Journal Plus, 137(9), Article 1075. https://doi.org/10.1140/epjp/s13360-022-03255-9' bibtex: '@article{Ahmadov_Nagiyev_Aydin_Tarverdiyeva_Orujova_Badalov_2022, title={Bound state solutions of Dirac equation: spin and pseudo-spin symmetry in the presence of the combined Manning–Rosen and Yukawa tensor potentials}, volume={137}, DOI={10.1140/epjp/s13360-022-03255-9}, number={91075}, journal={The European Physical Journal Plus}, publisher={Springer Science and Business Media LLC}, author={Ahmadov, A. I. and Nagiyev, Sh. M. and Aydin, C. and Tarverdiyeva, V. A. and Orujova, M. Sh. and Badalov, S. V.}, year={2022} }' chicago: 'Ahmadov, A. I., Sh. M. Nagiyev, C. Aydin, V. A. Tarverdiyeva, M. Sh. Orujova, and S. V. Badalov. “Bound State Solutions of Dirac Equation: Spin and Pseudo-Spin Symmetry in the Presence of the Combined Manning–Rosen and Yukawa Tensor Potentials.” The European Physical Journal Plus 137, no. 9 (2022). https://doi.org/10.1140/epjp/s13360-022-03255-9.' ieee: 'A. I. Ahmadov, Sh. M. Nagiyev, C. Aydin, V. A. Tarverdiyeva, M. Sh. Orujova, and S. V. Badalov, “Bound state solutions of Dirac equation: spin and pseudo-spin symmetry in the presence of the combined Manning–Rosen and Yukawa tensor potentials,” The European Physical Journal Plus, vol. 137, no. 9, Art. no. 1075, 2022, doi: 10.1140/epjp/s13360-022-03255-9.' mla: 'Ahmadov, A. I., et al. “Bound State Solutions of Dirac Equation: Spin and Pseudo-Spin Symmetry in the Presence of the Combined Manning–Rosen and Yukawa Tensor Potentials.” The European Physical Journal Plus, vol. 137, no. 9, 1075, Springer Science and Business Media LLC, 2022, doi:10.1140/epjp/s13360-022-03255-9.' short: A.I. Ahmadov, Sh.M. Nagiyev, C. Aydin, V.A. Tarverdiyeva, M.Sh. Orujova, S.V. Badalov, The European Physical Journal Plus 137 (2022). date_created: 2023-04-17T23:03:14Z date_updated: 2023-04-17T23:12:48Z doi: 10.1140/epjp/s13360-022-03255-9 intvolume: ' 137' issue: '9' keyword: - General Physics and Astronomy - Fluid Flow and Transfer Processes language: - iso: eng publication: The European Physical Journal Plus publication_identifier: issn: - 2190-5444 publication_status: published publisher: Springer Science and Business Media LLC status: public title: 'Bound state solutions of Dirac equation: spin and pseudo-spin symmetry in the presence of the combined Manning–Rosen and Yukawa tensor potentials' type: journal_article user_id: '78800' volume: 137 year: '2022' ... --- _id: '30213' abstract: - lang: eng text: Requirement changes and cascading effects of change propagation are major sources of inefficiencies in product development and increase the risk of project failure. Proactive change management of requirement changes yields the potential to handle such changes efficiently. A systematic approach is required for proactive change management to assess and reduce the risk of a requirement change with appropriate effort in industrial application. Within the paper at hand, a novel method for Proactive Management of Requirement Changes (ProMaRC) is presented. It is developed in close collaboration with industry experts and evaluated based on workshops, pilot users’ feedback, three industrial case studies from the automotive industry and five development projects from research. To limit the application effort, an automated approach for dependency analysis based on the machine learning technique BERT and semi-automated assessment of change likelihood and impact using a modified PageRank algorithm is developed. Applying the method, the risks of requirement changes are assessed systematically and reduced by means of proactive change measures. Evaluation shows high performance of dependency analysis and confirms the applicability and usefulness of the method. This contribution opens up the research space of proactive risk management for requirement changes which is currently almost unexploited. It enables more efficient product development. article_number: '1874' author: - first_name: Iris full_name: Gräßler, Iris id: '47565' last_name: Gräßler orcid: 0000-0001-5765-971X - first_name: Christian full_name: Oleff, Christian id: '41188' last_name: Oleff orcid: 0000-0002-0983-1850 - first_name: Daniel full_name: Preuß, Daniel id: '40253' last_name: Preuß citation: ama: Gräßler I, Oleff C, Preuß D. Proactive Management of Requirement Changes in the Development of Complex Technical Systems. Applied Sciences. 2022;12(4). doi:10.3390/app12041874 apa: Gräßler, I., Oleff, C., & Preuß, D. (2022). Proactive Management of Requirement Changes in the Development of Complex Technical Systems. Applied Sciences, 12(4), Article 1874. https://doi.org/10.3390/app12041874 bibtex: '@article{Gräßler_Oleff_Preuß_2022, title={Proactive Management of Requirement Changes in the Development of Complex Technical Systems}, volume={12}, DOI={10.3390/app12041874}, number={41874}, journal={Applied Sciences}, publisher={MDPI AG}, author={Gräßler, Iris and Oleff, Christian and Preuß, Daniel}, year={2022} }' chicago: Gräßler, Iris, Christian Oleff, and Daniel Preuß. “Proactive Management of Requirement Changes in the Development of Complex Technical Systems.” Applied Sciences 12, no. 4 (2022). https://doi.org/10.3390/app12041874. ieee: 'I. Gräßler, C. Oleff, and D. Preuß, “Proactive Management of Requirement Changes in the Development of Complex Technical Systems,” Applied Sciences, vol. 12, no. 4, Art. no. 1874, 2022, doi: 10.3390/app12041874.' mla: Gräßler, Iris, et al. “Proactive Management of Requirement Changes in the Development of Complex Technical Systems.” Applied Sciences, vol. 12, no. 4, 1874, MDPI AG, 2022, doi:10.3390/app12041874. short: I. Gräßler, C. Oleff, D. Preuß, Applied Sciences 12 (2022). date_created: 2022-03-08T12:37:42Z date_updated: 2023-05-03T08:40:30Z department: - _id: '152' doi: 10.3390/app12041874 intvolume: ' 12' issue: '4' keyword: - Fluid Flow and Transfer Processes - Computer Science Applications - Process Chemistry and Technology - General Engineering - Instrumentation - General Materials Science language: - iso: eng publication: Applied Sciences publication_identifier: issn: - 2076-3417 publication_status: published publisher: MDPI AG quality_controlled: '1' status: public title: Proactive Management of Requirement Changes in the Development of Complex Technical Systems type: journal_article user_id: '5905' volume: 12 year: '2022' ... --- _id: '20125' abstract: - lang: eng text: Datacenter applications have different resource requirements from network and developing flow scheduling heuristics for every workload is practically infeasible. In this paper, we show that deep reinforcement learning (RL) can be used to efficiently learn flow scheduling policies for different workloads without manual feature engineering. Specifically, we present LFS, which learns to optimize a high-level performance objective, e.g., maximize the number of flow admissions while meeting the deadlines. The LFS scheduler is trained through deep RL to learn a scheduling policy on continuous online flow arrivals. The evaluation results show that the trained LFS scheduler admits 1.05x more flows than the greedy flow scheduling heuristics under varying network load. author: - first_name: Asif full_name: Hasnain, Asif id: '63288' last_name: Hasnain - first_name: Holger full_name: Karl, Holger id: '126' last_name: Karl citation: ama: 'Hasnain A, Karl H. Learning Flow Scheduling. In: 2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC). IEEE Computer Society. doi:https://doi.org/10.1109/CCNC49032.2021.9369514' apa: 'Hasnain, A., & Karl, H. (n.d.). Learning Flow Scheduling. In 2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC). Las Vegas, USA: IEEE Computer Society. https://doi.org/10.1109/CCNC49032.2021.9369514' bibtex: '@inproceedings{Hasnain_Karl, title={Learning Flow Scheduling}, DOI={https://doi.org/10.1109/CCNC49032.2021.9369514}, booktitle={2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC)}, publisher={IEEE Computer Society}, author={Hasnain, Asif and Karl, Holger} }' chicago: Hasnain, Asif, and Holger Karl. “Learning Flow Scheduling.” In 2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC). IEEE Computer Society, n.d. https://doi.org/10.1109/CCNC49032.2021.9369514. ieee: A. Hasnain and H. Karl, “Learning Flow Scheduling,” in 2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC), Las Vegas, USA. mla: Hasnain, Asif, and Holger Karl. “Learning Flow Scheduling.” 2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC), IEEE Computer Society, doi:https://doi.org/10.1109/CCNC49032.2021.9369514. short: 'A. Hasnain, H. Karl, in: 2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC), IEEE Computer Society, n.d.' conference: end_date: 2021-01-12 location: Las Vegas, USA name: 2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC) start_date: 2021-01-09 date_created: 2020-10-19T14:27:17Z date_updated: 2022-01-06T06:54:20Z ddc: - '000' department: - _id: '75' doi: https://doi.org/10.1109/CCNC49032.2021.9369514 keyword: - Flow scheduling - Deadlines - Reinforcement learning language: - iso: eng main_file_link: - url: https://ieeexplore.ieee.org/document/9369514 project: - _id: '4' name: SFB 901 - Project Area C - _id: '16' name: SFB 901 - Subproject C4 - _id: '1' name: SFB 901 publication: 2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC) publication_status: accepted publisher: IEEE Computer Society status: public title: Learning Flow Scheduling type: conference user_id: '63288' year: '2021' ... --- _id: '35327' article_number: '121536' article_type: original author: - first_name: Martin full_name: Wortmann, Martin last_name: Wortmann - first_name: Klaus full_name: Viertel, Klaus last_name: Viertel - first_name: Alexander full_name: Welle, Alexander last_name: Welle - first_name: Waldemar full_name: Keil, Waldemar last_name: Keil - first_name: Natalie full_name: Frese, Natalie last_name: Frese - first_name: Wiebke full_name: Hachmann, Wiebke last_name: Hachmann - first_name: Philipp full_name: Krieger, Philipp last_name: Krieger - first_name: Johannes full_name: Brikmann, Johannes last_name: Brikmann - first_name: Claudia full_name: Schmidt, Claudia id: '466' last_name: Schmidt orcid: 0000-0003-3179-9997 - first_name: Elmar full_name: Moritzer, Elmar id: '20531' last_name: Moritzer - first_name: Bruno full_name: Hüsgen, Bruno last_name: Hüsgen citation: ama: Wortmann M, Viertel K, Welle A, et al. Anomalous bulk diffusion of methylene diphenyl diisocyanate in silicone elastomer. International Journal of Heat and Mass Transfer. 2021;177. doi:10.1016/j.ijheatmasstransfer.2021.121536 apa: Wortmann, M., Viertel, K., Welle, A., Keil, W., Frese, N., Hachmann, W., Krieger, P., Brikmann, J., Schmidt, C., Moritzer, E., & Hüsgen, B. (2021). Anomalous bulk diffusion of methylene diphenyl diisocyanate in silicone elastomer. International Journal of Heat and Mass Transfer, 177, Article 121536. https://doi.org/10.1016/j.ijheatmasstransfer.2021.121536 bibtex: '@article{Wortmann_Viertel_Welle_Keil_Frese_Hachmann_Krieger_Brikmann_Schmidt_Moritzer_et al._2021, title={Anomalous bulk diffusion of methylene diphenyl diisocyanate in silicone elastomer}, volume={177}, DOI={10.1016/j.ijheatmasstransfer.2021.121536}, number={121536}, journal={International Journal of Heat and Mass Transfer}, publisher={Elsevier BV}, author={Wortmann, Martin and Viertel, Klaus and Welle, Alexander and Keil, Waldemar and Frese, Natalie and Hachmann, Wiebke and Krieger, Philipp and Brikmann, Johannes and Schmidt, Claudia and Moritzer, Elmar and et al.}, year={2021} }' chicago: Wortmann, Martin, Klaus Viertel, Alexander Welle, Waldemar Keil, Natalie Frese, Wiebke Hachmann, Philipp Krieger, et al. “Anomalous Bulk Diffusion of Methylene Diphenyl Diisocyanate in Silicone Elastomer.” International Journal of Heat and Mass Transfer 177 (2021). https://doi.org/10.1016/j.ijheatmasstransfer.2021.121536. ieee: 'M. Wortmann et al., “Anomalous bulk diffusion of methylene diphenyl diisocyanate in silicone elastomer,” International Journal of Heat and Mass Transfer, vol. 177, Art. no. 121536, 2021, doi: 10.1016/j.ijheatmasstransfer.2021.121536.' mla: Wortmann, Martin, et al. “Anomalous Bulk Diffusion of Methylene Diphenyl Diisocyanate in Silicone Elastomer.” International Journal of Heat and Mass Transfer, vol. 177, 121536, Elsevier BV, 2021, doi:10.1016/j.ijheatmasstransfer.2021.121536. short: M. Wortmann, K. Viertel, A. Welle, W. Keil, N. Frese, W. Hachmann, P. Krieger, J. Brikmann, C. Schmidt, E. Moritzer, B. Hüsgen, International Journal of Heat and Mass Transfer 177 (2021). date_created: 2023-01-06T12:20:46Z date_updated: 2023-01-07T10:25:55Z department: - _id: '2' - _id: '9' - _id: '315' doi: 10.1016/j.ijheatmasstransfer.2021.121536 intvolume: ' 177' keyword: - Fluid Flow and Transfer Processes - Mechanical Engineering - Condensed Matter Physics language: - iso: eng publication: International Journal of Heat and Mass Transfer publication_identifier: issn: - 0017-9310 publication_status: published publisher: Elsevier BV quality_controlled: '1' status: public title: Anomalous bulk diffusion of methylene diphenyl diisocyanate in silicone elastomer type: journal_article user_id: '466' volume: 177 year: '2021' ... --- _id: '23465' abstract: - lang: eng text: One of the main objectives of production engineering is to reproducibly manufacture (complex) defect-free parts. To achieve this, it is necessary to employ an appropriate process or tool design. While this will generally prove successful, it cannot, however, offset stochastic defects with local variations in material properties. Closed-loop process control represents a promising approach for a solution in this context. The state of the art involves using this approach to control geometric parameters such as a length. So far, no research or applications have been conducted with closed-loop control for microstructure and product properties. In the project on which this paper is based, the local martensite content of parts is to be adjusted in a highly precise and reproducible manner. The forming process employed is a special, property-controlled flow-forming process. A model-based controller is thus to generate corresponding correction values for the tool-path geometry and tool-path velocity on the basis of online martensite content measurements. For the controller model, it is planned to use a special process or microstructure (correlation) model. The planned paper not only describes the experimental setup but also presents results of initial experimental investigations for subsequent use in the closed-loop control of α’-martensite content during flow-forming. author: - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Markus full_name: Riepold, Markus last_name: Riepold - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Frank full_name: Walther, Frank last_name: Walther citation: ama: 'Arian B, Homberg W, Riepold M, Trächtler A, Rozo Vasquez J, Walther F. Forming of metastable austenitic stainless steel tubes with axially graded martensite content by flow-forming. In: ULiège Library; 2021.' apa: Arian, B., Homberg, W., Riepold, M., Trächtler, A., Rozo Vasquez, J., & Walther, F. (2021). Forming of metastable austenitic stainless steel tubes with axially graded martensite content by flow-forming. 24th International Conference on Material Forming - ESAFORM 2021, Liège, Belgium. bibtex: '@inproceedings{Arian_Homberg_Riepold_Trächtler_Rozo Vasquez_Walther_2021, place={Liège}, title={Forming of metastable austenitic stainless steel tubes with axially graded martensite content by flow-forming}, publisher={ULiège Library}, author={Arian, Bahman and Homberg, Werner and Riepold, Markus and Trächtler, Ansgar and Rozo Vasquez, Julian and Walther, Frank}, year={2021} }' chicago: 'Arian, Bahman, Werner Homberg, Markus Riepold, Ansgar Trächtler, Julian Rozo Vasquez, and Frank Walther. “Forming of Metastable Austenitic Stainless Steel Tubes with Axially Graded Martensite Content by Flow-Forming.” Liège: ULiège Library, 2021.' ieee: B. Arian, W. Homberg, M. Riepold, A. Trächtler, J. Rozo Vasquez, and F. Walther, “Forming of metastable austenitic stainless steel tubes with axially graded martensite content by flow-forming,” presented at the 24th International Conference on Material Forming - ESAFORM 2021, Liège, Belgium, 2021. mla: Arian, Bahman, et al. Forming of Metastable Austenitic Stainless Steel Tubes with Axially Graded Martensite Content by Flow-Forming. ULiège Library, 2021. short: 'B. Arian, W. Homberg, M. Riepold, A. Trächtler, J. Rozo Vasquez, F. Walther, in: ULiège Library, Liège, 2021.' conference: end_date: 2021-04-16 location: Liège, Belgium name: 24th International Conference on Material Forming - ESAFORM 2021 start_date: 2021-04-14 date_created: 2021-08-23T13:00:35Z date_updated: 2023-05-02T08:27:48Z department: - _id: '156' - _id: '153' - _id: '241' keyword: - Flow-forming - Spinning - Process Strategy - Martensite Content - Property Control - Micromagnetic Measurement - Metastable Austenitic Stainless Steel language: - iso: eng main_file_link: - open_access: '1' url: https://popups.uliege.be/esaform21/index.php?id=2759 oa: '1' place: Liège publication_identifier: eisbn: - 978-2-87019-303-7 isbn: - 978-2-87019-302-0 publication_status: published publisher: ULiège Library quality_controlled: '1' status: public title: Forming of metastable austenitic stainless steel tubes with axially graded martensite content by flow-forming type: conference user_id: '36287' year: '2021' ... --- _id: '21447' abstract: - lang: eng text: "Even though the spectrum of parts is expected to shift over the long term as a result of increasing e-mobility, there is still an extremely high demand for complex components made of high-strength materials which can only be produced by hydroforming technologies. The innovative combination of hydroforming processes with other forming processes, as well as the improvement of the processes themselves, offers considerable potential for improvement. \r\nA number of promising ways of improving the hydroforming process chain are therefore the subject of this contribution. The focus of the article is on possible approaches for combining (incremental) pre- and post-forming operations, which can permit considerable improvements in both quality and features at a reduced cost. Furthermore, a novel combination of quasi-static and high-speed forming processes is presented, leading to an improved overall forming process (with a high application potential) for the production of complex parts. \r\n" author: - first_name: Eugen full_name: Wiens, Eugen id: '7888' last_name: Wiens - first_name: Eugen full_name: Djakow, Eugen id: '7904' last_name: Djakow - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg citation: ama: 'Wiens E, Djakow E, Homberg W. Some ideas for the further development of hydroforming process chains. In: Nebu/Nehy 2020. ; 2020.' apa: Wiens, E., Djakow, E., & Homberg, W. (2020). Some ideas for the further development of hydroforming process chains. Nebu/Nehy 2020. bibtex: '@inproceedings{Wiens_Djakow_Homberg_2020, title={Some ideas for the further development of hydroforming process chains}, booktitle={Nebu/Nehy 2020}, author={Wiens, Eugen and Djakow, Eugen and Homberg, Werner}, year={2020} }' chicago: Wiens, Eugen, Eugen Djakow, and Werner Homberg. “Some Ideas for the Further Development of Hydroforming Process Chains.” In Nebu/Nehy 2020, 2020. ieee: E. Wiens, E. Djakow, and W. Homberg, “Some ideas for the further development of hydroforming process chains,” 2020. mla: Wiens, Eugen, et al. “Some Ideas for the Further Development of Hydroforming Process Chains.” Nebu/Nehy 2020, 2020. short: 'E. Wiens, E. Djakow, W. Homberg, in: Nebu/Nehy 2020, 2020.' date_created: 2021-03-11T10:50:31Z date_updated: 2023-05-05T11:22:27Z department: - _id: '156' keyword: - Hydroforming - Incremental Forming - Internal Flow-turning - High-speed Forming language: - iso: eng publication: Nebu/Nehy 2020 status: public title: Some ideas for the further development of hydroforming process chains type: conference user_id: '7888' year: '2020' ... --- _id: '17651' abstract: - lang: eng text: 'Consider mitigating the effects of denial of service or of malicious traffic in networks by deleting edges. Edge deletion reduces the DoS or the number of the malicious flows, but it also inadvertently removes some of the desired flows. To model this important problem, we formulate two problems: (1) remove all the undesirable flows while minimizing the damage to the desirable ones and (2) balance removing the undesirable flows and not removing too many of the desirable flows. We prove these problems are equivalent to important theoretical problems, thereby being important not only practically but also theoretically, and very hard to approximate in a general network. We employ reductions to nonetheless approximate the problem and also provide a greedy approximation. When the network is a tree, the problems are still MAX SNP-hard, but we provide a greedy-based 2l-approximation algorithm, where l is the longest desirable flow. We also provide an algorithm, approximating the first and the second problem within {\$}{\$}2 {\backslash}sqrt{\{} 2{\backslash}left| E {\backslash}right| {\}}{\$}{\$}and {\$}{\$}2 {\backslash}sqrt{\{}2 ({\backslash}left| E {\backslash}right| + {\backslash}left| {\backslash}text {\{}undesirable flows{\}} {\backslash}right| ){\}}{\$}{\$}, respectively, where E is the set of the edges of the network. We also provide a fixed-parameter tractable (FPT) algorithm. Finally, if the tree has a root such that every flow in the tree flows on the path from the root to a leaf, we solve the problem exactly using dynamic programming.' author: - first_name: Gleb full_name: Polevoy, Gleb id: '83983' last_name: Polevoy - first_name: Stojan full_name: Trajanovski, Stojan last_name: Trajanovski - first_name: Paola full_name: Grosso, Paola last_name: Grosso - first_name: Cees full_name: de Laat, Cees last_name: de Laat citation: ama: 'Polevoy G, Trajanovski S, Grosso P, de Laat C. Removing Undesirable Flows by Edge Deletion. In: Kim D, Uma RN, Zelikovsky A, eds. Combinatorial Optimization and Applications. Cham: Springer International Publishing; 2018:217-232.' apa: 'Polevoy, G., Trajanovski, S., Grosso, P., & de Laat, C. (2018). Removing Undesirable Flows by Edge Deletion. In D. Kim, R. N. Uma, & A. Zelikovsky (Eds.), Combinatorial Optimization and Applications (pp. 217–232). Cham: Springer International Publishing.' bibtex: '@inproceedings{Polevoy_Trajanovski_Grosso_de Laat_2018, place={Cham}, title={Removing Undesirable Flows by Edge Deletion}, booktitle={Combinatorial Optimization and Applications}, publisher={Springer International Publishing}, author={Polevoy, Gleb and Trajanovski, Stojan and Grosso, Paola and de Laat, Cees}, editor={Kim, Donghyun and Uma, R. N. and Zelikovsky, AlexanderEditors}, year={2018}, pages={217–232} }' chicago: 'Polevoy, Gleb, Stojan Trajanovski, Paola Grosso, and Cees de Laat. “Removing Undesirable Flows by Edge Deletion.” In Combinatorial Optimization and Applications, edited by Donghyun Kim, R. N. Uma, and Alexander Zelikovsky, 217–32. Cham: Springer International Publishing, 2018.' ieee: G. Polevoy, S. Trajanovski, P. Grosso, and C. de Laat, “Removing Undesirable Flows by Edge Deletion,” in Combinatorial Optimization and Applications, 2018, pp. 217–232. mla: Polevoy, Gleb, et al. “Removing Undesirable Flows by Edge Deletion.” Combinatorial Optimization and Applications, edited by Donghyun Kim et al., Springer International Publishing, 2018, pp. 217–32. short: 'G. Polevoy, S. Trajanovski, P. Grosso, C. de Laat, in: D. Kim, R.N. Uma, A. Zelikovsky (Eds.), Combinatorial Optimization and Applications, Springer International Publishing, Cham, 2018, pp. 217–232.' date_created: 2020-08-06T15:19:36Z date_updated: 2022-01-06T06:53:16Z department: - _id: '63' - _id: '541' editor: - first_name: Donghyun full_name: Kim, Donghyun last_name: Kim - first_name: R. N. full_name: Uma, R. N. last_name: Uma - first_name: Alexander full_name: Zelikovsky, Alexander last_name: Zelikovsky extern: '1' keyword: - flow - Red-Blue Set Cover - Positive-Negative Partial Set Cover - approximation - tree - MAX SNP-hard - root - leaf - dynamic programming - FPT language: - iso: eng page: 217-232 place: Cham publication: Combinatorial Optimization and Applications publication_identifier: isbn: - 978-3-030-04651-4 publisher: Springer International Publishing status: public title: Removing Undesirable Flows by Edge Deletion type: conference user_id: '83983' year: '2018' ... --- _id: '2332' abstract: - lang: ger text: "Ein wichtiges Element der Digitalen Transformation ist die Digitalisierung der Prozesse in Unternehmen. Eine Herausforderung besteht hierbei in der systematischen Erkennung von Digitalisierungspotenzialen in Prozessen. Bestehende Ansätze benötigen Experten, welche Potenziale über ihre Erfahrung oder zeitaufwendig mithilfe von Musterkatalogen identifizieren.\r\nIn diesem Artikel werden verschiedene Digitalisierungspotenziale klassifiziert und Muster für ein zukünftiges musterbasiertes Analyseverfahren zur automatisierten Identifikation von Digitalisierungspotenzialen in BPMN-Diagrammen beschrieben. Im Vergleich zu bestehenden Ansätzen erlaubt es Experten die Identifizierung von Digitalisierungspotenzialen effizienter und effektiver durchzuführen." - lang: eng text: "An important element of digital transformation is the digitalization of processes within enterprises.\r\nA major challenge is the systematic identification of digitalization potentials in business processes.\r\nExisting approaches require experts who identify said potentials by using the time-consuming method of pattern catalogs or by relying on their professional experiences. \r\nIn this paper we classify potentials of digitalization and corresponding patterns for a future pattern-based analysis procedure. This shall allow for the automated identification of digitalization potentials in BPMN diagrams. In comparison to existing approaches, our proposed method could support a more efficient and effective identification of digitalization potentials by experts." author: - first_name: Florian full_name: Rittmeier, Florian id: '5281' last_name: Rittmeier - first_name: Gregor full_name: Engels, Gregor id: '107' last_name: Engels - first_name: Alexander full_name: Teetz, Alexander id: '5319' last_name: Teetz citation: ama: 'Rittmeier F, Engels G, Teetz A. Digitalisierungspotenziale in Geschäftsprozessen effizient und effektiv erkennen (Effective and Efficient Identification of Digitalization Potentials in Business Processes). In: Joint Proceedings of the Workshops at Modellierung 2018 co-located with Modellierung 2018, Braunschweig, Germany, February 21, 2018. Vol 2060. CEUR Workshop Proceedings. CEUR-WS.org; 2018:215--221.' apa: Rittmeier, F., Engels, G., & Teetz, A. (2018). Digitalisierungspotenziale in Geschäftsprozessen effizient und effektiv erkennen (Effective and Efficient Identification of Digitalization Potentials in Business Processes). In Joint Proceedings of the Workshops at Modellierung 2018 co-located with Modellierung 2018, Braunschweig, Germany, February 21, 2018. (Vol. 2060, pp. 215--221). CEUR-WS.org. bibtex: '@inproceedings{Rittmeier_Engels_Teetz_2018, series={CEUR Workshop Proceedings}, title={Digitalisierungspotenziale in Geschäftsprozessen effizient und effektiv erkennen (Effective and Efficient Identification of Digitalization Potentials in Business Processes)}, volume={2060}, booktitle={Joint Proceedings of the Workshops at Modellierung 2018 co-located with Modellierung 2018, Braunschweig, Germany, February 21, 2018.}, publisher={CEUR-WS.org}, author={Rittmeier, Florian and Engels, Gregor and Teetz, Alexander}, year={2018}, pages={215--221}, collection={CEUR Workshop Proceedings} }' chicago: Rittmeier, Florian, Gregor Engels, and Alexander Teetz. “Digitalisierungspotenziale in Geschäftsprozessen effizient und effektiv erkennen (Effective and Efficient Identification of Digitalization Potentials in Business Processes).” In Joint Proceedings of the Workshops at Modellierung 2018 co-located with Modellierung 2018, Braunschweig, Germany, February 21, 2018., 2060:215--221. CEUR Workshop Proceedings. CEUR-WS.org, 2018. ieee: F. Rittmeier, G. Engels, and A. Teetz, “Digitalisierungspotenziale in Geschäftsprozessen effizient und effektiv erkennen (Effective and Efficient Identification of Digitalization Potentials in Business Processes),” in Joint Proceedings of the Workshops at Modellierung 2018 co-located with Modellierung 2018, Braunschweig, Germany, February 21, 2018., 2018, vol. 2060, pp. 215--221. mla: Rittmeier, Florian, et al. “Digitalisierungspotenziale in Geschäftsprozessen effizient und effektiv erkennen (Effective and Efficient Identification of Digitalization Potentials in Business Processes).” Joint Proceedings of the Workshops at Modellierung 2018 co-located with Modellierung 2018, Braunschweig, Germany, February 21, 2018., vol. 2060, CEUR-WS.org, 2018, pp. 215--221. short: 'F. Rittmeier, G. Engels, A. Teetz, in: Joint Proceedings of the Workshops at Modellierung 2018 co-located with Modellierung 2018, Braunschweig, Germany, February 21, 2018., CEUR-WS.org, 2018, pp. 215--221.' date_created: 2018-04-13T09:44:09Z date_updated: 2022-01-06T06:55:49Z department: - _id: '66' intvolume: ' 2060' keyword: - Digitalisierungspotenziale - BPI - Digitale Transformation - Information Flow-Modellierung - Patterns - Requirements Engineering language: - iso: ger main_file_link: - open_access: '1' url: http://ceur-ws.org/Vol-2060/rebpm2.pdf oa: '1' page: 215--221 publication: Joint Proceedings of the Workshops at Modellierung 2018 co-located with Modellierung 2018, Braunschweig, Germany, February 21, 2018. publication_status: published publisher: CEUR-WS.org series_title: CEUR Workshop Proceedings status: public title: Digitalisierungspotenziale in Geschäftsprozessen effizient und effektiv erkennen (Effective and Efficient Identification of Digitalization Potentials in Business Processes) type: conference user_id: '5281' volume: 2060 year: '2018' ... --- _id: '10129' abstract: - lang: eng text: There are many hard conjectures in graph theory, like Tutte's 5-flow conjecture, and the 5-cycle double cover conjecture, which would be true in general if they would be true for cubic graphs. Since most of them are trivially true for 3-edge-colorable cubic graphs, cubic graphs which are not 3-edge-colorable, often called snarks, play a key role in this context. Here, we survey parameters measuring how far apart a non 3-edge-colorable graph is from being 3-edge-colorable. We study their interrelation and prove some new results. Besides getting new insight into the structure of snarks, we show that such measures give partial results with respect to these important conjectures. The paper closes with a list of open problems and conjectures. article_number: P4.54 article_type: original author: - first_name: M. A. full_name: Fiol, M. A. last_name: Fiol - first_name: Guiseppe full_name: Mazzuoccolo, Guiseppe last_name: Mazzuoccolo - first_name: Eckhard full_name: Steffen, Eckhard id: '15548' last_name: Steffen citation: ama: Fiol MA, Mazzuoccolo G, Steffen E. Measures of Edge-Uncolorability of Cubic Graphs. The Electronic Journal of Combinatorics. 2018;25(4). apa: Fiol, M. A., Mazzuoccolo, G., & Steffen, E. (2018). Measures of Edge-Uncolorability of Cubic Graphs. The Electronic Journal of Combinatorics, 25(4). bibtex: '@article{Fiol_Mazzuoccolo_Steffen_2018, title={Measures of Edge-Uncolorability of Cubic Graphs}, volume={25}, number={4P4.54}, journal={The Electronic Journal of Combinatorics}, author={Fiol, M. A. and Mazzuoccolo, Guiseppe and Steffen, Eckhard}, year={2018} }' chicago: Fiol, M. A., Guiseppe Mazzuoccolo, and Eckhard Steffen. “Measures of Edge-Uncolorability of Cubic Graphs.” The Electronic Journal of Combinatorics 25, no. 4 (2018). ieee: M. A. Fiol, G. Mazzuoccolo, and E. Steffen, “Measures of Edge-Uncolorability of Cubic Graphs,” The Electronic Journal of Combinatorics, vol. 25, no. 4, 2018. mla: Fiol, M. A., et al. “Measures of Edge-Uncolorability of Cubic Graphs.” The Electronic Journal of Combinatorics, vol. 25, no. 4, P4.54, 2018. short: M.A. Fiol, G. Mazzuoccolo, E. Steffen, The Electronic Journal of Combinatorics 25 (2018). date_created: 2019-06-05T09:59:10Z date_updated: 2022-01-06T06:50:30Z department: - _id: '542' intvolume: ' 25' issue: '4' keyword: - Cubic graph - Tait coloring - Snark - Boole coloring - Berge's conjecture - Tutte's 5-flow conjecture language: - iso: eng publication: The Electronic Journal of Combinatorics status: public title: Measures of Edge-Uncolorability of Cubic Graphs type: journal_article user_id: '15540' volume: 25 year: '2018' ... --- _id: '17652' author: - first_name: Gleb full_name: Polevoy, Gleb id: '83983' last_name: Polevoy - first_name: Stojan full_name: Trajanovski, Stojan last_name: Trajanovski - first_name: Paola full_name: Grosso, Paola last_name: Grosso - first_name: Cees full_name: de Laat, Cees last_name: de Laat citation: ama: 'Polevoy G, Trajanovski S, Grosso P, de Laat C. Filtering Undesirable Flows in Networks. In: Combinatorial Optimization and Applications: 11th International Conference, COCOA 2017, Shanghai, China, December 16-18, 2017, Proceedings, Part I. Lecture Notes in Computer Science. Cham: Springer International Publishing; 2017:3-17. doi:10.1007/978-3-319-71150-8_1' apa: 'Polevoy, G., Trajanovski, S., Grosso, P., & de Laat, C. (2017). Filtering Undesirable Flows in Networks. In Combinatorial Optimization and Applications: 11th International Conference, COCOA 2017, Shanghai, China, December 16-18, 2017, Proceedings, Part I (pp. 3–17). Cham: Springer International Publishing. https://doi.org/10.1007/978-3-319-71150-8_1' bibtex: '@inproceedings{Polevoy_Trajanovski_Grosso_de Laat_2017, place={Cham}, series={Lecture Notes in Computer Science}, title={Filtering Undesirable Flows in Networks}, DOI={10.1007/978-3-319-71150-8_1}, booktitle={Combinatorial Optimization and Applications: 11th International Conference, COCOA 2017, Shanghai, China, December 16-18, 2017, Proceedings, Part I}, publisher={Springer International Publishing}, author={Polevoy, Gleb and Trajanovski, Stojan and Grosso, Paola and de Laat, Cees}, year={2017}, pages={3–17}, collection={Lecture Notes in Computer Science} }' chicago: 'Polevoy, Gleb, Stojan Trajanovski, Paola Grosso, and Cees de Laat. “Filtering Undesirable Flows in Networks.” In Combinatorial Optimization and Applications: 11th International Conference, COCOA 2017, Shanghai, China, December 16-18, 2017, Proceedings, Part I, 3–17. Lecture Notes in Computer Science. Cham: Springer International Publishing, 2017. https://doi.org/10.1007/978-3-319-71150-8_1.' ieee: 'G. Polevoy, S. Trajanovski, P. Grosso, and C. de Laat, “Filtering Undesirable Flows in Networks,” in Combinatorial Optimization and Applications: 11th International Conference, COCOA 2017, Shanghai, China, December 16-18, 2017, Proceedings, Part I, 2017, pp. 3–17.' mla: 'Polevoy, Gleb, et al. “Filtering Undesirable Flows in Networks.” Combinatorial Optimization and Applications: 11th International Conference, COCOA 2017, Shanghai, China, December 16-18, 2017, Proceedings, Part I, Springer International Publishing, 2017, pp. 3–17, doi:10.1007/978-3-319-71150-8_1.' short: 'G. Polevoy, S. Trajanovski, P. Grosso, C. de Laat, in: Combinatorial Optimization and Applications: 11th International Conference, COCOA 2017, Shanghai, China, December 16-18, 2017, Proceedings, Part I, Springer International Publishing, Cham, 2017, pp. 3–17.' date_created: 2020-08-06T15:19:48Z date_updated: 2022-01-06T06:53:16Z department: - _id: '63' - _id: '541' doi: 10.1007/978-3-319-71150-8_1 extern: '1' keyword: - flow - filter - MMSA - set cover - approximation - local ratio algorithm language: - iso: eng page: 3-17 place: Cham publication: 'Combinatorial Optimization and Applications: 11th International Conference, COCOA 2017, Shanghai, China, December 16-18, 2017, Proceedings, Part I' publication_identifier: isbn: - 978-3-319-71150-8 publisher: Springer International Publishing series_title: Lecture Notes in Computer Science status: public title: Filtering Undesirable Flows in Networks type: conference user_id: '83983' year: '2017' ... --- _id: '4873' abstract: - lang: eng text: 'Banks face a ''behavioralization'' of their balance sheets since deposit funding increasingly consists of non-maturing deposits with uncertain cash flows exposing banks to asset liability (ALM) risk. Thus, this study examines the behavior of banks’ retail customers regarding non-maturing deposits. Our unique sample comprises the contract and cash flow data for 2.2 million individual contracts from 1991 to 2010. We find that contractual rewards, i.e., qualified interest payments, and government subsidies, effectively stabilize saving behavior and thus bank funding. The probability of an early deposit withdrawal decreases by approximately 40%, and cash flow volatility drops by about 25%. Our findings provide important insights for banks using pricing incentives to steer desired saving patterns for their non-maturing deposit portfolios. Finally, these results are informative regarding the bank liquidity regulations (Basel III) concerning the stability of deposits and the minimum requirements for risk management (European Commission DIRECTIVE 2006/48/EC). ' article_type: original author: - first_name: Tobias full_name: Schlueter, Tobias last_name: Schlueter - first_name: Sönke full_name: Sievers, Sönke id: '46447' last_name: Sievers - first_name: Thomas full_name: Hartmann-Wendels, Thomas last_name: Hartmann-Wendels citation: ama: Schlueter T, Sievers S, Hartmann-Wendels T. Bank funding stability, pricing strategies and the guidance of depositors. Journal of Banking & Finance (VHB-JOURQUAL 3 Ranking A). 2015;51:43-61. doi:10.2139/ssrn.2001449 apa: Schlueter, T., Sievers, S., & Hartmann-Wendels, T. (2015). Bank funding stability, pricing strategies and the guidance of depositors. Journal of Banking & Finance (VHB-JOURQUAL 3 Ranking A), 51, 43–61. https://doi.org/10.2139/ssrn.2001449 bibtex: '@article{Schlueter_Sievers_Hartmann-Wendels_2015, title={Bank funding stability, pricing strategies and the guidance of depositors}, volume={51}, DOI={10.2139/ssrn.2001449}, journal={Journal of Banking & Finance (VHB-JOURQUAL 3 Ranking A)}, author={Schlueter, Tobias and Sievers, Sönke and Hartmann-Wendels, Thomas}, year={2015}, pages={43–61} }' chicago: 'Schlueter, Tobias, Sönke Sievers, and Thomas Hartmann-Wendels. “Bank Funding Stability, Pricing Strategies and the Guidance of Depositors.” Journal of Banking & Finance (VHB-JOURQUAL 3 Ranking A) 51 (2015): 43–61. https://doi.org/10.2139/ssrn.2001449.' ieee: T. Schlueter, S. Sievers, and T. Hartmann-Wendels, “Bank funding stability, pricing strategies and the guidance of depositors,” Journal of Banking & Finance (VHB-JOURQUAL 3 Ranking A), vol. 51, pp. 43–61, 2015. mla: Schlueter, Tobias, et al. “Bank Funding Stability, Pricing Strategies and the Guidance of Depositors.” Journal of Banking & Finance (VHB-JOURQUAL 3 Ranking A), vol. 51, 2015, pp. 43–61, doi:10.2139/ssrn.2001449. short: T. Schlueter, S. Sievers, T. Hartmann-Wendels, Journal of Banking & Finance (VHB-JOURQUAL 3 Ranking A) 51 (2015) 43–61. date_created: 2018-10-26T07:08:32Z date_updated: 2022-01-06T07:01:28Z department: - _id: '275' doi: 10.2139/ssrn.2001449 intvolume: ' 51' jel: - G01 - G21 - G28 keyword: - retail saving behavior - non-maturing deposits - deposit funding - contractual rewards - interest rate bonus - saving persistence - cash flow volatility language: - iso: eng main_file_link: - url: https://www.sciencedirect.com/science/article/pii/S0378426614003380 page: 43-61 publication: Journal of Banking & Finance (VHB-JOURQUAL 3 Ranking A) publication_status: published quality_controlled: '1' status: public title: Bank funding stability, pricing strategies and the guidance of depositors type: journal_article user_id: '46447' volume: 51 year: '2015' ... --- _id: '17663' abstract: - lang: eng text: 'In this paper, we define and study a new problem, referred to as the Dependent Unsplittable Flow Problem (D-UFP). We present and discuss this problem in the context of large-scale powerful (radar/camera) sensor networks, but we believe it has important applications on the admission of large flows in other networks as well. In order to optimize the selection of flows transmitted to the gateway, D-UFP takes into account possible dependencies between flows. We show that D-UFP is more difficult than NP-hard problems for which no good approximation is known. Then, we address two special cases of this problem: the case where all the sensors have a shared channel and the case where the sensors form a mesh and route to the gateway over a spanning tree.' author: - first_name: R. full_name: Cohen, R. last_name: Cohen - first_name: I. full_name: Nudelman, I. last_name: Nudelman - first_name: Gleb full_name: Polevoy, Gleb id: '83983' last_name: Polevoy citation: ama: Cohen R, Nudelman I, Polevoy G. On the Admission of Dependent Flows in Powerful Sensor Networks. Networking, IEEE/ACM Transactions on. 2013;21(5):1461-1471. doi:10.1109/TNET.2012.2227792 apa: Cohen, R., Nudelman, I., & Polevoy, G. (2013). On the Admission of Dependent Flows in Powerful Sensor Networks. Networking, IEEE/ACM Transactions On, 21(5), 1461–1471. https://doi.org/10.1109/TNET.2012.2227792 bibtex: '@article{Cohen_Nudelman_Polevoy_2013, title={On the Admission of Dependent Flows in Powerful Sensor Networks}, volume={21}, DOI={10.1109/TNET.2012.2227792}, number={5}, journal={Networking, IEEE/ACM Transactions on}, author={Cohen, R. and Nudelman, I. and Polevoy, Gleb}, year={2013}, pages={1461–1471} }' chicago: 'Cohen, R., I. Nudelman, and Gleb Polevoy. “On the Admission of Dependent Flows in Powerful Sensor Networks.” Networking, IEEE/ACM Transactions On 21, no. 5 (2013): 1461–71. https://doi.org/10.1109/TNET.2012.2227792.' ieee: R. Cohen, I. Nudelman, and G. Polevoy, “On the Admission of Dependent Flows in Powerful Sensor Networks,” Networking, IEEE/ACM Transactions on, vol. 21, no. 5, pp. 1461–1471, 2013. mla: Cohen, R., et al. “On the Admission of Dependent Flows in Powerful Sensor Networks.” Networking, IEEE/ACM Transactions On, vol. 21, no. 5, 2013, pp. 1461–71, doi:10.1109/TNET.2012.2227792. short: R. Cohen, I. Nudelman, G. Polevoy, Networking, IEEE/ACM Transactions On 21 (2013) 1461–1471. date_created: 2020-08-06T15:22:05Z date_updated: 2022-01-06T06:53:16Z department: - _id: '63' - _id: '541' doi: 10.1109/TNET.2012.2227792 extern: '1' intvolume: ' 21' issue: '5' keyword: - Approximation algorithms - Approximation methods - Bandwidth - Logic gates - Radar - Vectors - Wireless sensor networks - Dependent flow scheduling - sensor networks language: - iso: eng page: 1461-1471 publication: Networking, IEEE/ACM Transactions on publication_identifier: issn: - 1063-6692 status: public title: On the Admission of Dependent Flows in Powerful Sensor Networks type: journal_article user_id: '83983' volume: 21 year: '2013' ... --- _id: '5113' abstract: - lang: eng text: 'Standard equity valuation approaches (i.e., DDM, RIM, and DCF model) are derived under the assumption of ideal conditions, such as infinite payoffs and clean surplus accounting. Because these conditions are hardly ever met, we extend the standard approaches, based on the fundamental principle of financial statement articulation. The extended models are then tested empirically by employing two sets of forecasts: (1) analyst forecasts provided by Value Line and (2) forecasts generated by cross-sectional regression models. The main result is that our extended models yield considerably smaller valuation errors. Moreover, by construction, identical value estimates are obtained across the extended models. By reestablishing empirical equivalence under non-ideal conditions, our approach provides a benchmark that enables us to quantify the errors resulting from individual deviations from ideal conditions, and thus, to analyze the robustness of the standard approaches. Finally, by providing a level playing field for the different valuation approaches, our findings have implications for other empirical settings, for example, estimating the implied cost of capital. ' article_type: original author: - first_name: Nicolas full_name: Heinrichs, Nicolas last_name: Heinrichs - first_name: Dieter full_name: Hess, Dieter last_name: Hess - first_name: Carsten full_name: Homburg, Carsten last_name: Homburg - first_name: Michael full_name: Lorenz, Michael last_name: Lorenz - first_name: Sönke full_name: Sievers, Sönke id: '46447' last_name: Sievers citation: ama: 'Heinrichs N, Hess D, Homburg C, Lorenz M, Sievers S. Extended dividend, cash flow, and residual income valuation models: Accounting for deviations from ideal conditions. Contemporary Accounting Research (VHB-JOURQUAL 3 Ranking A). 2013;30(1):42-79. doi:10.2139/ssrn.1145201' apa: 'Heinrichs, N., Hess, D., Homburg, C., Lorenz, M., & Sievers, S. (2013). Extended dividend, cash flow, and residual income valuation models: Accounting for deviations from ideal conditions. Contemporary Accounting Research (VHB-JOURQUAL 3 Ranking A), 30(1), 42–79. https://doi.org/10.2139/ssrn.1145201' bibtex: '@article{Heinrichs_Hess_Homburg_Lorenz_Sievers_2013, title={Extended dividend, cash flow, and residual income valuation models: Accounting for deviations from ideal conditions}, volume={30}, DOI={10.2139/ssrn.1145201}, number={1}, journal={Contemporary Accounting Research (VHB-JOURQUAL 3 Ranking A)}, publisher={Wiley Online Library}, author={Heinrichs, Nicolas and Hess, Dieter and Homburg, Carsten and Lorenz, Michael and Sievers, Sönke}, year={2013}, pages={42–79} }' chicago: 'Heinrichs, Nicolas, Dieter Hess, Carsten Homburg, Michael Lorenz, and Sönke Sievers. “Extended Dividend, Cash Flow, and Residual Income Valuation Models: Accounting for Deviations from Ideal Conditions.” Contemporary Accounting Research (VHB-JOURQUAL 3 Ranking A) 30, no. 1 (2013): 42–79. https://doi.org/10.2139/ssrn.1145201.' ieee: 'N. Heinrichs, D. Hess, C. Homburg, M. Lorenz, and S. Sievers, “Extended dividend, cash flow, and residual income valuation models: Accounting for deviations from ideal conditions,” Contemporary Accounting Research (VHB-JOURQUAL 3 Ranking A), vol. 30, no. 1, pp. 42–79, 2013.' mla: 'Heinrichs, Nicolas, et al. “Extended Dividend, Cash Flow, and Residual Income Valuation Models: Accounting for Deviations from Ideal Conditions.” Contemporary Accounting Research (VHB-JOURQUAL 3 Ranking A), vol. 30, no. 1, Wiley Online Library, 2013, pp. 42–79, doi:10.2139/ssrn.1145201.' short: N. Heinrichs, D. Hess, C. Homburg, M. Lorenz, S. Sievers, Contemporary Accounting Research (VHB-JOURQUAL 3 Ranking A) 30 (2013) 42–79. date_created: 2018-10-31T07:58:17Z date_updated: 2022-01-06T07:01:38Z department: - _id: '275' doi: 10.2139/ssrn.1145201 extern: '1' intvolume: ' 30' issue: '1' jel: - G12 - G14 - M41 keyword: - Dividend Discount Model - Residual Income - Discounted Cash Flow - Dirty Surplus - Terminal Value - Valuation Error language: - iso: eng main_file_link: - url: http://onlinelibrary.wiley.com/doi/10.1111/j.1911-3846.2011.01148.x/abstract page: 42-79 publication: Contemporary Accounting Research (VHB-JOURQUAL 3 Ranking A) publication_status: published publisher: Wiley Online Library quality_controlled: '1' related_material: link: - relation: earlier_version url: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1145201 status: public title: 'Extended dividend, cash flow, and residual income valuation models: Accounting for deviations from ideal conditions' type: journal_article user_id: '46447' volume: 30 year: '2013' ...