[{"volume":7,"date_created":"2026-02-07T16:15:23Z","author":[{"first_name":"S.","full_name":"Vowinkel, S.","last_name":"Vowinkel"},{"first_name":"S.","full_name":"Paul, S.","last_name":"Paul"},{"full_name":"Gutmann, Torsten","id":"118165","last_name":"Gutmann","first_name":"Torsten"},{"last_name":"Gallei","full_name":"Gallei, M.","first_name":"M."}],"date_updated":"2026-02-17T16:12:54Z","doi":"10.3390/nano7110390","title":"Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing","issue":"11","publication_identifier":{"issn":["2079-4991"]},"intvolume":"         7","page":"390","citation":{"ieee":"S. Vowinkel, S. Paul, T. Gutmann, and M. Gallei, “Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing,” <i>Nanomaterials</i>, vol. 7, no. 11, p. 390, 2017, doi: <a href=\"https://doi.org/10.3390/nano7110390\">10.3390/nano7110390</a>.","chicago":"Vowinkel, S., S. Paul, Torsten Gutmann, and M. Gallei. “Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing.” <i>Nanomaterials</i> 7, no. 11 (2017): 390. <a href=\"https://doi.org/10.3390/nano7110390\">https://doi.org/10.3390/nano7110390</a>.","ama":"Vowinkel S, Paul S, Gutmann T, Gallei M. Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing. <i>Nanomaterials</i>. 2017;7(11):390. doi:<a href=\"https://doi.org/10.3390/nano7110390\">10.3390/nano7110390</a>","apa":"Vowinkel, S., Paul, S., Gutmann, T., &#38; Gallei, M. (2017). Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing. <i>Nanomaterials</i>, <i>7</i>(11), 390. <a href=\"https://doi.org/10.3390/nano7110390\">https://doi.org/10.3390/nano7110390</a>","short":"S. Vowinkel, S. Paul, T. Gutmann, M. Gallei, Nanomaterials 7 (2017) 390.","bibtex":"@article{Vowinkel_Paul_Gutmann_Gallei_2017, title={Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing}, volume={7}, DOI={<a href=\"https://doi.org/10.3390/nano7110390\">10.3390/nano7110390</a>}, number={11}, journal={Nanomaterials}, author={Vowinkel, S. and Paul, S. and Gutmann, Torsten and Gallei, M.}, year={2017}, pages={390} }","mla":"Vowinkel, S., et al. “Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing.” <i>Nanomaterials</i>, vol. 7, no. 11, 2017, p. 390, doi:<a href=\"https://doi.org/10.3390/nano7110390\">10.3390/nano7110390</a>."},"year":"2017","user_id":"100715","_id":"64053","extern":"1","language":[{"iso":"eng"}],"keyword":["Materials Science","Science & Technology - Other Topics","solid-state nmr","spectroscopy","catalysts","colloidal crystals","colloids","cross-linking","elastomeric opal films","emulsion polymerization","gamma-methacryloxypropyltrimethoxysilane","hybrid films","melt-shear organization","nanoparticles","particle","photons","polymers","processing","self-assembly","transition"],"publication":"Nanomaterials","type":"journal_article","status":"public","abstract":[{"text":"The utilization and preparation of functional hybrid films for optical sensing applications and membranes is of utmost importance. In this work, we report the convenient and scalable preparation of self-crosslinking particle-based films derived by directed self-assembly of alkoxysilane-based cross-linkers as part of a core-shell particle architecture. The synthesis of well-designed monodisperse core-shell particles by emulsion polymerization is the basic prerequisite for subsequent particle processing via the melt-shear organization technique. In more detail, the core particles consist of polystyrene (PS) or poly(methyl methacrylate) (PMMA), while the comparably soft particle shell consists of poly(ethyl acrylate) (PEA) and different alkoxysilane-based poly(methacrylate)s. For hybrid film formation and convenient self-cross-linking, different alkyl groups at the siloxane moieties were investigated in detail by solid-state Magic-Angle Spinning Nuclear Magnetic Resonance (MAS, NMR) spectroscopy revealing different crosslinking capabilities, which strongly influence the properties of the core or shell particle films with respect to transparency and iridescent reflection colors. Furthermore, solid-state NMR spectroscopy and investigation of the thermal properties by differential scanning calorimetry (DSC) measurements allow for insights into the cross-linking capabilities prior to and after synthesis, as well as after the thermally and pressure-induced processing steps. Subsequently, free-standing and self-crosslinked particle-based films featuring excellent particle order are obtained by application of the melt-shear organization technique, as shown by microscopy (TEM, SEM).","lang":"eng"}]},{"doi":"10.1002/adma.201702473","title":"Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State","author":[{"first_name":"Yonggui","full_name":"Wang, Yonggui","last_name":"Wang"},{"first_name":"Pedro B.","full_name":"Groszewicz, Pedro B.","last_name":"Groszewicz"},{"first_name":"Sabine","full_name":"Rosenfeldt, Sabine","last_name":"Rosenfeldt"},{"first_name":"Hendrik","last_name":"Schmidt","full_name":"Schmidt, Hendrik"},{"first_name":"Cynthia A.","full_name":"Volkert, Cynthia A.","last_name":"Volkert"},{"last_name":"Vana","full_name":"Vana, Philipp","first_name":"Philipp"},{"last_name":"Gutmann","id":"118165","full_name":"Gutmann, Torsten","first_name":"Torsten"},{"first_name":"Gerd","full_name":"Buntkowsky, Gerd","last_name":"Buntkowsky"},{"full_name":"Zhang, Kai","last_name":"Zhang","first_name":"Kai"}],"date_created":"2026-02-07T16:16:37Z","date_updated":"2026-02-17T16:12:48Z","page":"1702473","citation":{"bibtex":"@article{Wang_Groszewicz_Rosenfeldt_Schmidt_Volkert_Vana_Gutmann_Buntkowsky_Zhang_2017, title={Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State}, DOI={<a href=\"https://doi.org/10.1002/adma.201702473\">10.1002/adma.201702473</a>}, journal={Advanced Materials}, author={Wang, Yonggui and Groszewicz, Pedro B. and Rosenfeldt, Sabine and Schmidt, Hendrik and Volkert, Cynthia A. and Vana, Philipp and Gutmann, Torsten and Buntkowsky, Gerd and Zhang, Kai}, year={2017}, pages={1702473} }","mla":"Wang, Yonggui, et al. “Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State.” <i>Advanced Materials</i>, 2017, p. 1702473, doi:<a href=\"https://doi.org/10.1002/adma.201702473\">10.1002/adma.201702473</a>.","short":"Y. Wang, P.B. Groszewicz, S. Rosenfeldt, H. Schmidt, C.A. Volkert, P. Vana, T. Gutmann, G. Buntkowsky, K. Zhang, Advanced Materials (2017) 1702473.","apa":"Wang, Y., Groszewicz, P. B., Rosenfeldt, S., Schmidt, H., Volkert, C. A., Vana, P., Gutmann, T., Buntkowsky, G., &#38; Zhang, K. (2017). Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State. <i>Advanced Materials</i>, 1702473. <a href=\"https://doi.org/10.1002/adma.201702473\">https://doi.org/10.1002/adma.201702473</a>","ama":"Wang Y, Groszewicz PB, Rosenfeldt S, et al. Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State. <i>Advanced Materials</i>. Published online 2017:1702473. doi:<a href=\"https://doi.org/10.1002/adma.201702473\">10.1002/adma.201702473</a>","ieee":"Y. Wang <i>et al.</i>, “Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State,” <i>Advanced Materials</i>, p. 1702473, 2017, doi: <a href=\"https://doi.org/10.1002/adma.201702473\">10.1002/adma.201702473</a>.","chicago":"Wang, Yonggui, Pedro B. Groszewicz, Sabine Rosenfeldt, Hendrik Schmidt, Cynthia A. Volkert, Philipp Vana, Torsten Gutmann, Gerd Buntkowsky, and Kai Zhang. “Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State.” <i>Advanced Materials</i>, 2017, 1702473. <a href=\"https://doi.org/10.1002/adma.201702473\">https://doi.org/10.1002/adma.201702473</a>."},"year":"2017","language":[{"iso":"eng"}],"extern":"1","keyword":["nanoparticles","self-assembly","cellulose","core-coronas structure","thermoreversible"],"user_id":"100715","_id":"64057","status":"public","abstract":[{"lang":"eng","text":"Self-assembly of nanoparticles (NPs) forming unique structures has been investigated extensively over the past few years. However, many self-assembled structures by NPs are irreversible, because they are generally constructed using their suspensions. It is still challenging for NPs to reversibly self-assemble in dry state, let alone of polymeric NPs with general sizes of hundreds of nm. Herein, this study reports a new reversible self-assembly phenomenon of NPs in dry state, forming thermoreversible strip-like supermolecular structures. These novel NPs of around 150 nm are perfluorinated surface-undecenoated cellulose nanoparticles (FSU-CNPs) with a core-coronas structure. The thermoreversible self-assembled structure is formed after drying in the air at the interface between FSU-CNP films and Teflon substrates. Remarkably, the formation and dissociation of this assembled structure are accompanied by a reversible conversion of the surface hydrophobicity, film transparency, and anisotropic properties. These findings show novel feasibility of reversible self-assembly of NPs in dry state, and thereby expand our knowledge of self-assembly phenomenon."}],"publication":"Advanced Materials","type":"journal_article"},{"_id":"9966","project":[{"_id":"92","name":"Intelligente Herstellung zuverlässiger Kupferbondverbindungen","grant_number":"02 PQ2210"}],"department":[{"_id":"151"}],"user_id":"210","keyword":["Self-optimization","adaptive system","bond process","copper wire"],"language":[{"iso":"eng"}],"publication":"IEEE 66th Electronic Components and Technology Conference","type":"conference","abstract":[{"text":"Usage of copper wire bonds allows to push power boundaries imposed by aluminum wire bonds. Copper allows higher electrical, thermal and mechanical loads than aluminum, which currently is the most commonly used material in heavy wire bonding. This is the main driving factor for increased usage of copper in high power applications such as wind turbines, locomotives or electric vehicles. At the same time, usage of copper also increases tool wear and reduces the range of parameter values for a stable process, making the process more challenging. To overcome these drawbacks, parameter adaptation at runtime using self-optimization is desired. A self-optimizing system is based on system objectives that evaluate and quantify system performance. System parameters can be changed at runtime such that pre-selected objective values are reached. For adaptation of bond process parameters, model-based self-optimization is employed. Since it is based on a model of the system, the bond process was modeled. In addition to static model parameters such as wire and substrate material properties and vibration characteristics of transducer and tool, variable model inputs are process parameters. Main simulation result is bonded area in the wiresubstrate contact. This model is then used to find valid and optimal working points before operation. The working point is composed of normal force and ultrasonic voltage trajectories, which are usually determined experimentally. Instead, multiobjective optimalization is used to compute trajectories that simultaneously optimize bond quality, process duration, tool wear and probability of tool-substrate contacts. The values of these objectives are computed using the process model. At runtime, selection among pre-determined optimal working points is sufficient to prioritize individual objectives. This way, the computationally expensive process of numerically solving a multiobjective optimal control problem and the demanding high speed bonding process are separated. To evaluate to what extent the pre-defined goals of self-optimization are met, an offthe- shelf heavy wire bonding machine was modified to allow for parameter adaptation and for transmitting of measurement data at runtime. This data is received by an external computer system and evaluated to select a new working point. Then, new process parameters are sent to the modified bonding machine for use for subsequent bonds. With these components, a full self-optimizing system has been implemented.","lang":"eng"}],"status":"public","date_updated":"2020-05-07T05:33:53Z","date_created":"2019-05-27T09:17:26Z","author":[{"first_name":"Tobias","full_name":"Meyer , Tobias","last_name":"Meyer "},{"first_name":"Andreas","last_name":"Unger","full_name":"Unger, Andreas"},{"first_name":"Simon","full_name":"Althoff, Simon","last_name":"Althoff"},{"last_name":"Sextro","full_name":"Sextro, Walter","id":"21220","first_name":"Walter"},{"first_name":"Michael","last_name":"Brökelmann","full_name":"Brökelmann, Michael"},{"full_name":"Hunstig, Matthias","last_name":"Hunstig","first_name":"Matthias"},{"full_name":"Guth, Karsten","last_name":"Guth","first_name":"Karsten"}],"title":"Reliable Manufacturing of Heavy Copper Wire Bonds Using Online Parameter Adaptation","doi":"10.1109/ECTC.2016.215","quality_controlled":"1","year":"2016","page":"622-628","citation":{"ama":"Meyer  T, Unger A, Althoff S, et al. Reliable Manufacturing of Heavy Copper Wire Bonds Using Online Parameter Adaptation. In: <i>IEEE 66th Electronic Components and Technology Conference</i>. ; 2016:622-628. doi:<a href=\"https://doi.org/10.1109/ECTC.2016.215\">10.1109/ECTC.2016.215</a>","ieee":"T. Meyer  <i>et al.</i>, “Reliable Manufacturing of Heavy Copper Wire Bonds Using Online Parameter Adaptation,” in <i>IEEE 66th Electronic Components and Technology Conference</i>, 2016, pp. 622–628.","chicago":"Meyer , Tobias, Andreas Unger, Simon Althoff, Walter Sextro, Michael Brökelmann, Matthias Hunstig, and Karsten Guth. “Reliable Manufacturing of Heavy Copper Wire Bonds Using Online Parameter Adaptation.” In <i>IEEE 66th Electronic Components and Technology Conference</i>, 622–28, 2016. <a href=\"https://doi.org/10.1109/ECTC.2016.215\">https://doi.org/10.1109/ECTC.2016.215</a>.","short":"T. Meyer , A. Unger, S. Althoff, W. Sextro, M. Brökelmann, M. Hunstig, K. Guth, in: IEEE 66th Electronic Components and Technology Conference, 2016, pp. 622–628.","bibtex":"@inproceedings{Meyer _Unger_Althoff_Sextro_Brökelmann_Hunstig_Guth_2016, title={Reliable Manufacturing of Heavy Copper Wire Bonds Using Online Parameter Adaptation}, DOI={<a href=\"https://doi.org/10.1109/ECTC.2016.215\">10.1109/ECTC.2016.215</a>}, booktitle={IEEE 66th Electronic Components and Technology Conference}, author={Meyer , Tobias and Unger, Andreas and Althoff, Simon and Sextro, Walter and Brökelmann, Michael and Hunstig, Matthias and Guth, Karsten}, year={2016}, pages={622–628} }","mla":"Meyer , Tobias, et al. “Reliable Manufacturing of Heavy Copper Wire Bonds Using Online Parameter Adaptation.” <i>IEEE 66th Electronic Components and Technology Conference</i>, 2016, pp. 622–28, doi:<a href=\"https://doi.org/10.1109/ECTC.2016.215\">10.1109/ECTC.2016.215</a>.","apa":"Meyer , T., Unger, A., Althoff, S., Sextro, W., Brökelmann, M., Hunstig, M., &#38; Guth, K. (2016). Reliable Manufacturing of Heavy Copper Wire Bonds Using Online Parameter Adaptation. In <i>IEEE 66th Electronic Components and Technology Conference</i> (pp. 622–628). <a href=\"https://doi.org/10.1109/ECTC.2016.215\">https://doi.org/10.1109/ECTC.2016.215</a>"}},{"file":[{"relation":"main_file","success":1,"content_type":"application/pdf","file_name":"07163237.pdf","file_id":"5313","access_level":"closed","file_size":5605009,"date_created":"2018-11-02T15:47:45Z","creator":"ups","date_updated":"2018-11-02T15:47:45Z"}],"publication":"IEEE Computer","language":[{"iso":"eng"}],"ddc":["000"],"keyword":["self-awareness","self-expression"],"year":"2015","issue":"7","title":"Self-Aware and Self-Expressive Systems – Guest Editor's Introduction","date_created":"2018-03-23T14:06:12Z","publisher":"IEEE Computer Society","status":"public","type":"journal_article","file_date_updated":"2018-11-02T15:47:45Z","user_id":"16153","department":[{"_id":"27"},{"_id":"518"},{"_id":"78"}],"project":[{"_id":"1","name":"SFB 901"},{"name":"SFB 901 - Project Area C","_id":"4"},{"_id":"14","name":"SFB 901 - Subproject C2"},{"grant_number":"610996","_id":"34","name":"Self-Adaptive Virtualisation-Aware High-Performance/Low-Energy Heterogeneous System Architectures"}],"_id":"1772","citation":{"ama":"Torresen J, Plessl C, Yao X. Self-Aware and Self-Expressive Systems – Guest Editor’s Introduction. <i>IEEE Computer</i>. 2015;48(7):18-20. doi:<a href=\"https://doi.org/10.1109/MC.2015.205\">10.1109/MC.2015.205</a>","chicago":"Torresen, Jim, Christian Plessl, and Xin Yao. “Self-Aware and Self-Expressive Systems – Guest Editor’s Introduction.” <i>IEEE Computer</i> 48, no. 7 (2015): 18–20. <a href=\"https://doi.org/10.1109/MC.2015.205\">https://doi.org/10.1109/MC.2015.205</a>.","ieee":"J. Torresen, C. Plessl, and X. Yao, “Self-Aware and Self-Expressive Systems – Guest Editor’s Introduction,” <i>IEEE Computer</i>, vol. 48, no. 7, pp. 18–20, 2015.","short":"J. Torresen, C. Plessl, X. Yao, IEEE Computer 48 (2015) 18–20.","bibtex":"@article{Torresen_Plessl_Yao_2015, title={Self-Aware and Self-Expressive Systems – Guest Editor’s Introduction}, volume={48}, DOI={<a href=\"https://doi.org/10.1109/MC.2015.205\">10.1109/MC.2015.205</a>}, number={7}, journal={IEEE Computer}, publisher={IEEE Computer Society}, author={Torresen, Jim and Plessl, Christian and Yao, Xin}, year={2015}, pages={18–20} }","mla":"Torresen, Jim, et al. “Self-Aware and Self-Expressive Systems – Guest Editor’s Introduction.” <i>IEEE Computer</i>, vol. 48, no. 7, IEEE Computer Society, 2015, pp. 18–20, doi:<a href=\"https://doi.org/10.1109/MC.2015.205\">10.1109/MC.2015.205</a>.","apa":"Torresen, J., Plessl, C., &#38; Yao, X. (2015). Self-Aware and Self-Expressive Systems – Guest Editor’s Introduction. <i>IEEE Computer</i>, <i>48</i>(7), 18–20. <a href=\"https://doi.org/10.1109/MC.2015.205\">https://doi.org/10.1109/MC.2015.205</a>"},"page":"18-20","intvolume":"        48","has_accepted_license":"1","doi":"10.1109/MC.2015.205","author":[{"last_name":"Torresen","full_name":"Torresen, Jim","first_name":"Jim"},{"full_name":"Plessl, Christian","id":"16153","last_name":"Plessl","orcid":"0000-0001-5728-9982","first_name":"Christian"},{"first_name":"Xin","last_name":"Yao","full_name":"Yao, Xin"}],"volume":48,"date_updated":"2022-01-06T06:53:19Z"},{"year":"2015","citation":{"ama":"Scherer A, Wünderlich N, Von Wangenheim F. The Value of Self-Service: Long-Term Effects of Technology-Based Self-Service Usage on Customer Retention. <i>MIS Quarterly</i>. 2015;39(1):177-200.","ieee":"A. Scherer, N. Wünderlich, and F. Von Wangenheim, “The Value of Self-Service: Long-Term Effects of Technology-Based Self-Service Usage on Customer Retention.,” <i>MIS Quarterly</i>, vol. 39, no. 1, pp. 177–200, 2015.","chicago":"Scherer, Anne, Nancy Wünderlich, and Florian Von Wangenheim. “The Value of Self-Service: Long-Term Effects of Technology-Based Self-Service Usage on Customer Retention.” <i>MIS Quarterly</i> 39, no. 1 (2015): 177–200.","apa":"Scherer, A., Wünderlich, N., &#38; Von Wangenheim, F. (2015). The Value of Self-Service: Long-Term Effects of Technology-Based Self-Service Usage on Customer Retention. <i>MIS Quarterly</i>, <i>39</i>(1), 177–200.","short":"A. Scherer, N. Wünderlich, F. Von Wangenheim, MIS Quarterly 39 (2015) 177–200.","mla":"Scherer, Anne, et al. “The Value of Self-Service: Long-Term Effects of Technology-Based Self-Service Usage on Customer Retention.” <i>MIS Quarterly</i>, vol. 39, no. 1, MIS RC, 2015, pp. 177–200.","bibtex":"@article{Scherer_Wünderlich_Von Wangenheim_2015, title={The Value of Self-Service: Long-Term Effects of Technology-Based Self-Service Usage on Customer Retention.}, volume={39}, number={1}, journal={MIS Quarterly}, publisher={MIS RC}, author={Scherer, Anne and Wünderlich, Nancy and Von Wangenheim, Florian}, year={2015}, pages={177–200} }"},"intvolume":"        39","page":"177-200","publication_status":"published","publication_identifier":{"issn":["0276-7783."]},"issue":"1","title":"The Value of Self-Service: Long-Term Effects of Technology-Based Self-Service Usage on Customer Retention.","date_updated":"2022-01-06T07:02:36Z","publisher":"MIS RC","author":[{"first_name":"Anne","full_name":"Scherer, Anne","last_name":"Scherer"},{"id":"36392","full_name":"Wünderlich, Nancy","last_name":"Wünderlich","first_name":"Nancy"},{"last_name":"Von Wangenheim","full_name":"Von Wangenheim, Florian","first_name":"Florian"}],"date_created":"2018-11-15T11:36:38Z","volume":39,"abstract":[{"lang":"eng","text":"Advancements in information technology have changed the way customers experience a service encounter and their relationship with service providers. Especially technology-based self-service channels have found their way into the 21st century service economy. While research embraces these channels for their cost-efficiency, it has not examined whether a shift from personal to self-service affects customer–firm relationships. Drawing from the service-dominant logic and its central concept of value-in-context, we discuss customers’ value creation in self-service and personal service channels and examine the long-term impact of these channels on customer retention. Using longitudinal customer data, we investigate how the ratio of self-service versus personal service use influences customer defection over time. Our findings suggest that the ratio of self-service to personal service used affects customer defection in a U-shaped manner, with intermediate levels of both self-service and personal service use being associated with the lowest likelihood of defection. We also find that this effect mitigates over time. We conclude that firms should not shift customers toward self-service channels completely, especially not at the beginning of a relationship. Our study underlines the importance of understanding when and how self-service technologies create valuable customer experiences and stresses the notion of actively managing customers’ cocreation of value. "}],"status":"public","type":"journal_article","publication":"MIS Quarterly","article_type":"original","keyword":["customer defection","customer retention","e-service","longitudinal","Self-service","value-in-context"],"language":[{"iso":"eng"}],"_id":"5704","user_id":"37741","department":[{"_id":"181"}]},{"citation":{"ieee":"T. Brahm, D. Wagner, and T. Jenert, “A person-centred approach to students’ transition into Higher Education,” presented at the 16th Biennial EARLI Conference for Research on Learning and Instruction, Zypern, 2015.","chicago":"Brahm, Taiga, Dietrich Wagner, and Tobias Jenert. “A Person-Centred Approach to Students’ Transition into Higher Education,” 2015.","ama":"Brahm T, Wagner D, Jenert T. A person-centred approach to students’ transition into Higher Education. In: ; 2015.","apa":"Brahm, T., Wagner, D., &#38; Jenert, T. (2015). A person-centred approach to students’ transition into Higher Education. Presented at the 16th Biennial EARLI Conference for Research on Learning and Instruction, Zypern.","bibtex":"@inproceedings{Brahm_Wagner_Jenert_2015, title={A person-centred approach to students’ transition into Higher Education}, author={Brahm, Taiga and Wagner, Dietrich and Jenert, Tobias}, year={2015} }","short":"T. Brahm, D. Wagner, T. Jenert, in: 2015.","mla":"Brahm, Taiga, et al. <i>A Person-Centred Approach to Students’ Transition into Higher Education</i>. 2015."},"year":"2015","conference":{"name":"16th Biennial EARLI Conference for Research on Learning and Instruction","start_date":"2015-08-25","end_date":"2015-08-29","location":"Zypern"},"title":"A person-centred approach to students' transition into Higher Education","date_created":"2018-09-18T12:56:31Z","author":[{"first_name":"Taiga","last_name":"Brahm","full_name":"Brahm, Taiga"},{"first_name":"Dietrich","last_name":"Wagner","full_name":"Wagner, Dietrich"},{"last_name":"Jenert","orcid":" https://orcid.org/0000-0001-9262-5646","id":"71994","full_name":"Jenert, Tobias","first_name":"Tobias"}],"date_updated":"2022-01-06T07:01:05Z","status":"public","abstract":[{"text":"A highly selective first study phase in many Swiss study programs leads to a rather competitive climate among students. However, the atmosphere at the university is an important factor for students' transition into Higher Education. An important question in this context is whether students' are equipped with different dispositions influencing how they cope with this transition. Other research has already shown that different groups of students can be identified regarding their student behavior. Yet, so far little is known about patterns of variables characterizing students, transitioning successfully. The paper takes advantage of a person-centered approach, i.e. the latent-class analysis, which makes it possible to identify groups of individuals, sharing common attributes. The research was conducted as a longitudinal study during their first year at a Swiss university. The return rate was about 67%, with 820 utilizable questionnaires at t1. Based on the analysis of students' anxiety, intrinsic motivation and self-efficacy, three distinct classes of students could be identified. The first class can be called the \"highly motivated and self-confident\" students. The second class is characterized by the same pattern, however, on a more intermediate level and the last class can be described as the \"least motivated and most anxious\" group of students. This study contributes to research and theory on students' transition into higher education and could be a first hint that students' experiences of this transition can vary substantially.","lang":"eng"}],"type":"conference","extern":"1","keyword":["Quantitative methods","Self-efficacy","Higher education","Motivation and Emotion"],"user_id":"51057","department":[{"_id":"208"},{"_id":"282"}],"_id":"4464"},{"language":[{"iso":"eng"}],"keyword":["Kavitationsdetektion","Self-Sensing","So- nochemie","Ultraschallwandler"],"department":[{"_id":"151"}],"user_id":"55222","_id":"9944","status":"public","abstract":[{"lang":"eng","text":"Eine Vielzahl von Prozessen in der Chemie und Verfahrenstechnik kann durch Ultraschall positiv beeinflusst werden. Oftmals ist ultraschallinduzierte Kavitation der Hauptwirkmechanismus für die positiven Effekte der Beschallung. Daher ist es notwendig die Kavitationsaktivität während des Prozesses zu quantifizieren um die Beschallung für den jeweiligen Prozess optimal gestalten und überwachen zu können. Eine Möglichkeit der prozessbegleitenden Kavitationsdetektion ist die Auswertung der akustischen Emissionen von oszillierenden und kollabierenden Kavitationsblasen mittels Drucksensoren in der Flüssigkeit. Raue Prozessrandbedingungen wie hohe Temperaturen oder aggressive Flüssigkeiten erschweren es jedoch geeignete Sensoren zu finden. Als Alternative wurde daher die Nutzbarkeit der Rückwirkung von Kavitationsereignissen auf das elektrische Eingansgssignal des Ultraschallwandlers zur Quantifizierung von Kavitation untersucht. Die experimentelle Analyse hat ergeben, dass das Einsetzen und in einigen Fällen auch die Art der Kavitation auf Basis der Rückwirkung auf das Stromsignal des Ultraschallwandlers bestimmt werden kann. Die Stärke der Kavitation war hingegen nicht aus den Stromsignalen abzuleiten."}],"publication":"tm - Technisches Messen","popular_science":"1","type":"journal_article","doi":"10.1515/teme-2015-0017","title":"Kavitationsdetektion mittels Self-Sensing-Ultraschallwandler","volume":82,"date_created":"2019-05-27T08:13:40Z","author":[{"full_name":"Bornmann, Peter","last_name":"Bornmann","first_name":"Peter"},{"first_name":"Tobias","id":"210","full_name":"Hemsel, Tobias","last_name":"Hemsel"},{"id":"21220","full_name":"Sextro, Walter","last_name":"Sextro","first_name":"Walter"},{"first_name":"Gianluca","last_name":"Memoli","full_name":"Memoli, Gianluca"},{"full_name":"Hodnett, Mark","last_name":"Hodnett","first_name":"Mark"},{"first_name":"Bajram","full_name":"Zeqiri, Bajram","last_name":"Zeqiri"}],"date_updated":"2019-09-16T10:44:38Z","intvolume":"        82","page":"73-84","citation":{"bibtex":"@article{Bornmann_Hemsel_Sextro_Memoli_Hodnett_Zeqiri_2015, title={Kavitationsdetektion mittels Self-Sensing-Ultraschallwandler}, volume={82}, DOI={<a href=\"https://doi.org/10.1515/teme-2015-0017\">10.1515/teme-2015-0017</a>}, number={2}, journal={tm - Technisches Messen}, author={Bornmann, Peter and Hemsel, Tobias and Sextro, Walter and Memoli, Gianluca and Hodnett, Mark and Zeqiri, Bajram}, year={2015}, pages={73–84} }","mla":"Bornmann, Peter, et al. “Kavitationsdetektion Mittels Self-Sensing-Ultraschallwandler.” <i>Tm - Technisches Messen</i>, vol. 82, no. 2, 2015, pp. 73–84, doi:<a href=\"https://doi.org/10.1515/teme-2015-0017\">10.1515/teme-2015-0017</a>.","short":"P. Bornmann, T. Hemsel, W. Sextro, G. Memoli, M. Hodnett, B. Zeqiri, Tm - Technisches Messen 82 (2015) 73–84.","apa":"Bornmann, P., Hemsel, T., Sextro, W., Memoli, G., Hodnett, M., &#38; Zeqiri, B. (2015). Kavitationsdetektion mittels Self-Sensing-Ultraschallwandler. <i>Tm - Technisches Messen</i>, <i>82</i>(2), 73–84. <a href=\"https://doi.org/10.1515/teme-2015-0017\">https://doi.org/10.1515/teme-2015-0017</a>","ieee":"P. Bornmann, T. Hemsel, W. Sextro, G. Memoli, M. Hodnett, and B. Zeqiri, “Kavitationsdetektion mittels Self-Sensing-Ultraschallwandler,” <i>tm - Technisches Messen</i>, vol. 82, no. 2, pp. 73–84, 2015.","chicago":"Bornmann, Peter, Tobias Hemsel, Walter Sextro, Gianluca Memoli, Mark Hodnett, and Bajram Zeqiri. “Kavitationsdetektion Mittels Self-Sensing-Ultraschallwandler.” <i>Tm - Technisches Messen</i> 82, no. 2 (2015): 73–84. <a href=\"https://doi.org/10.1515/teme-2015-0017\">https://doi.org/10.1515/teme-2015-0017</a>.","ama":"Bornmann P, Hemsel T, Sextro W, Memoli G, Hodnett M, Zeqiri B. Kavitationsdetektion mittels Self-Sensing-Ultraschallwandler. <i>tm - Technisches Messen</i>. 2015;82(2):73-84. doi:<a href=\"https://doi.org/10.1515/teme-2015-0017\">10.1515/teme-2015-0017</a>"},"year":"2015","issue":"2"},{"_id":"9949","department":[{"_id":"151"}],"user_id":"55222","keyword":["Adaptive systems","Reliability analysis","Availability","Adaptive control","Maintenance","Self-optimizing systems","Self-optimizing control","Stochastic Petri-nets"],"language":[{"iso":"eng"}],"publication":"Proceedings of the 9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes","type":"conference","abstract":[{"lang":"eng","text":"Intelligent mechatronic systems other the possibility to adapt system behavior to current dependability. This can be used to assure reliability by controlling system behavior to reach a pre-defined lifetime. By using such closed loop control, the margin of error of useful lifetime of an individual system is lowered. It is also possible to change the pre-defined lifetime during operation, by adapting system behavior to derate component usage. When planning maintenance actions, the remaining useful lifetime of each individual system has to be taken into account. Usually, stochastic properties of a fleet of systems are analyzed to create maintenance plans. Among these, the main factor is the probability of an individual system to last until maintenance. If condition-based maintenance is used, this is updated for each individual system using available information about its current state. By lowering the margin of error of useful lifetime, which directly corresponds to the time until maintenance, extended maintenance periods are made possible. Also using reliability-adaptive operation, a reversal of degradation driven maintenance planning is possible where a maintenance plan is setup not only according to system properties, but mainly to requirements imposed by maintenance personnel or infrastructure. Each system then adapts its behavior accordingly and fails according to the maintenance plan, making better use of maintenance personnel and system capabilities at the same time. In this contribution, the potential of maintenance plan driven system behavior adaptation is shown. A model including adaptation process and maintenance actions is simulated over full system lifetime to assess the advantages gained."}],"status":"public","date_updated":"2019-09-16T10:43:42Z","date_created":"2019-05-27T08:29:40Z","author":[{"full_name":"Meyer, Tobias","last_name":"Meyer","first_name":"Tobias"},{"first_name":"Thorben","id":"14802","full_name":"Kaul, Thorben","last_name":"Kaul"},{"last_name":"Sextro","full_name":"Sextro, Walter","id":"21220","first_name":"Walter"}],"title":"Advantages of reliability-adaptive system operation for maintenance planning","doi":"10.1016/j.ifacol.2015.09.647","quality_controlled":"1","year":"2015","page":"940-945","citation":{"apa":"Meyer, T., Kaul, T., &#38; Sextro, W. (2015). Advantages of reliability-adaptive system operation for maintenance planning. In <i>Proceedings of the 9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes</i> (pp. 940–945). <a href=\"https://doi.org/10.1016/j.ifacol.2015.09.647\">https://doi.org/10.1016/j.ifacol.2015.09.647</a>","mla":"Meyer, Tobias, et al. “Advantages of Reliability-Adaptive System Operation for Maintenance Planning.” <i>Proceedings of the 9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes</i>, 2015, pp. 940–45, doi:<a href=\"https://doi.org/10.1016/j.ifacol.2015.09.647\">10.1016/j.ifacol.2015.09.647</a>.","short":"T. Meyer, T. Kaul, W. Sextro, in: Proceedings of the 9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes, 2015, pp. 940–945.","bibtex":"@inproceedings{Meyer_Kaul_Sextro_2015, title={Advantages of reliability-adaptive system operation for maintenance planning}, DOI={<a href=\"https://doi.org/10.1016/j.ifacol.2015.09.647\">10.1016/j.ifacol.2015.09.647</a>}, booktitle={Proceedings of the 9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes}, author={Meyer, Tobias and Kaul, Thorben and Sextro, Walter}, year={2015}, pages={940–945} }","ama":"Meyer T, Kaul T, Sextro W. Advantages of reliability-adaptive system operation for maintenance planning. In: <i>Proceedings of the 9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes</i>. ; 2015:940-945. doi:<a href=\"https://doi.org/10.1016/j.ifacol.2015.09.647\">10.1016/j.ifacol.2015.09.647</a>","ieee":"T. Meyer, T. Kaul, and W. Sextro, “Advantages of reliability-adaptive system operation for maintenance planning,” in <i>Proceedings of the 9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes</i>, 2015, pp. 940–945.","chicago":"Meyer, Tobias, Thorben Kaul, and Walter Sextro. “Advantages of Reliability-Adaptive System Operation for Maintenance Planning.” In <i>Proceedings of the 9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes</i>, 940–45, 2015. <a href=\"https://doi.org/10.1016/j.ifacol.2015.09.647\">https://doi.org/10.1016/j.ifacol.2015.09.647</a>."}},{"language":[{"iso":"eng"}],"keyword":["Energy management","hybrid energy storage system","self-optimization","multi-objective optimization","adaptive systems","pareto set","SFB614-D1","SFB614-D2","LEA-Publikation","Eigene"],"user_id":"66","department":[{"_id":"52"}],"_id":"29973","status":"public","abstract":[{"text":"Haushaltsgeräte aus der Klasse der \"Weißen Ware\" tragen mit etwa einem Drittel ($34,2%$ \\citeBDEW2013) zum privaten Energieverbrauch bei. Diese Veröffentlichung präsentiert eine Struktur und die dafür notwendige optimale Betriebsstrategie für Weiße Ware in einer Umgebung mit Strompreisen, die wegen der Volatilität der Regenerativen Energien stark fluktuieren. Das vorgeschlagene Konzept nutzt dafür ein dezentrales Energiemanagementsystem, das über drei Hierarchieebenen verteilt ist: die Geräteebene, die Haushaltsebene und die Ortsnetzebene. Auf der Geräteebene nutzt dieses Konzept zusätzlich Betriebsflexibilitäten der Haushaltsgeräte aus.","lang":"eng"}],"type":"conference","publication":"ETG-Fachtagung \"Von Smart Grids zu Smart Markets\"","main_file_link":[{"url":"https://www.vde-verlag.de/proceedings-en/453897045.html"}],"title":"Hierarchisches Optimierungskonzept für die Laststeuerung von Haushaltsgeräten","date_created":"2022-02-23T09:24:36Z","author":[{"first_name":"Karl Stephan Christian","last_name":"Stille","orcid":"0000-0002-4212-6555","id":"30152","full_name":"Stille, Karl Stephan Christian"},{"orcid":"0000-0002-8480-7295","last_name":"Böcker","full_name":"Böcker, Joachim","id":"66","first_name":"Joachim"},{"first_name":"Ralf","last_name":"Bettentrup","full_name":"Bettentrup, Ralf"},{"full_name":"Kaiser, Ingo","last_name":"Kaiser","first_name":"Ingo"}],"publisher":"VDE","date_updated":"2022-02-23T16:10:58Z","citation":{"apa":"Stille, K. S. C., Böcker, J., Bettentrup, R., &#38; Kaiser, I. (2015). Hierarchisches Optimierungskonzept für die Laststeuerung von Haushaltsgeräten. <i>ETG-Fachtagung “Von Smart Grids Zu Smart Markets.”</i>","short":"K.S.C. Stille, J. Böcker, R. Bettentrup, I. Kaiser, in: ETG-Fachtagung “Von Smart Grids Zu Smart Markets,” VDE, Kassel, 2015.","mla":"Stille, Karl Stephan Christian, et al. “Hierarchisches Optimierungskonzept Für Die Laststeuerung von Haushaltsgeräten.” <i>ETG-Fachtagung “Von Smart Grids Zu Smart Markets,”</i> VDE, 2015.","bibtex":"@inproceedings{Stille_Böcker_Bettentrup_Kaiser_2015, place={Kassel}, title={Hierarchisches Optimierungskonzept für die Laststeuerung von Haushaltsgeräten}, booktitle={ETG-Fachtagung “Von Smart Grids zu Smart Markets”}, publisher={VDE}, author={Stille, Karl Stephan Christian and Böcker, Joachim and Bettentrup, Ralf and Kaiser, Ingo}, year={2015} }","ieee":"K. S. C. Stille, J. Böcker, R. Bettentrup, and I. Kaiser, “Hierarchisches Optimierungskonzept für die Laststeuerung von Haushaltsgeräten,” 2015.","chicago":"Stille, Karl Stephan Christian, Joachim Böcker, Ralf Bettentrup, and Ingo Kaiser. “Hierarchisches Optimierungskonzept Für Die Laststeuerung von Haushaltsgeräten.” In <i>ETG-Fachtagung “Von Smart Grids Zu Smart Markets.”</i> Kassel: VDE, 2015.","ama":"Stille KSC, Böcker J, Bettentrup R, Kaiser I. Hierarchisches Optimierungskonzept für die Laststeuerung von Haushaltsgeräten. In: <i>ETG-Fachtagung “Von Smart Grids Zu Smart Markets.”</i> VDE; 2015."},"year":"2015","place":"Kassel"},{"_id":"17661","department":[{"_id":"63"},{"_id":"541"}],"user_id":"83983","series_title":"AAMAS '14","keyword":["crowd-sensing","crowdsourcing","data aggregation","game theory","norms","reciprocation","self interested agents","simulation"],"language":[{"iso":"eng"}],"extern":"1","publication":"Proceedings of the 2014 International Conference on Autonomous Agents and Multi-agent Systems","type":"conference","status":"public","publisher":"International Foundation for Autonomous Agents and Multiagent Systems","date_updated":"2022-01-06T06:53:16Z","date_created":"2020-08-06T15:21:45Z","author":[{"last_name":"King","full_name":"King, Thomas C.","first_name":"Thomas C."},{"first_name":"Qingzhi","last_name":"Liu","full_name":"Liu, Qingzhi"},{"first_name":"Gleb","id":"83983","full_name":"Polevoy, Gleb","last_name":"Polevoy"},{"first_name":"Mathijs","full_name":"de Weerdt, Mathijs","last_name":"de Weerdt"},{"first_name":"Virginia","full_name":"Dignum, Virginia","last_name":"Dignum"},{"full_name":"van Riemsdijk, M. Birna","last_name":"van Riemsdijk","first_name":"M. Birna"},{"last_name":"Warnier","full_name":"Warnier, Martijn","first_name":"Martijn"}],"title":"Request Driven Social Sensing","publication_identifier":{"isbn":["978-1-4503-2738-1"]},"place":"Richland, SC","year":"2014","page":"1651-1652","citation":{"ama":"King TC, Liu Q, Polevoy G, et al. Request Driven Social Sensing. In: <i>Proceedings of the 2014 International Conference on Autonomous Agents and Multi-Agent Systems</i>. AAMAS ’14. Richland, SC: International Foundation for Autonomous Agents and Multiagent Systems; 2014:1651-1652.","chicago":"King, Thomas C., Qingzhi Liu, Gleb Polevoy, Mathijs de Weerdt, Virginia Dignum, M. Birna van Riemsdijk, and Martijn Warnier. “Request Driven Social Sensing.” In <i>Proceedings of the 2014 International Conference on Autonomous Agents and Multi-Agent Systems</i>, 1651–52. AAMAS ’14. Richland, SC: International Foundation for Autonomous Agents and Multiagent Systems, 2014.","ieee":"T. C. King <i>et al.</i>, “Request Driven Social Sensing,” in <i>Proceedings of the 2014 International Conference on Autonomous Agents and Multi-agent Systems</i>, 2014, pp. 1651–1652.","apa":"King, T. C., Liu, Q., Polevoy, G., de Weerdt, M., Dignum, V., van Riemsdijk, M. B., &#38; Warnier, M. (2014). Request Driven Social Sensing. In <i>Proceedings of the 2014 International Conference on Autonomous Agents and Multi-agent Systems</i> (pp. 1651–1652). Richland, SC: International Foundation for Autonomous Agents and Multiagent Systems.","mla":"King, Thomas C., et al. “Request Driven Social Sensing.” <i>Proceedings of the 2014 International Conference on Autonomous Agents and Multi-Agent Systems</i>, International Foundation for Autonomous Agents and Multiagent Systems, 2014, pp. 1651–52.","short":"T.C. King, Q. Liu, G. Polevoy, M. de Weerdt, V. Dignum, M.B. van Riemsdijk, M. Warnier, in: Proceedings of the 2014 International Conference on Autonomous Agents and Multi-Agent Systems, International Foundation for Autonomous Agents and Multiagent Systems, Richland, SC, 2014, pp. 1651–1652.","bibtex":"@inproceedings{King_Liu_Polevoy_de Weerdt_Dignum_van Riemsdijk_Warnier_2014, place={Richland, SC}, series={AAMAS ’14}, title={Request Driven Social Sensing}, booktitle={Proceedings of the 2014 International Conference on Autonomous Agents and Multi-agent Systems}, publisher={International Foundation for Autonomous Agents and Multiagent Systems}, author={King, Thomas C. and Liu, Qingzhi and Polevoy, Gleb and de Weerdt, Mathijs and Dignum, Virginia and van Riemsdijk, M. Birna and Warnier, Martijn}, year={2014}, pages={1651–1652}, collection={AAMAS ’14} }"}},{"year":"2014","page":"1-6","citation":{"ieee":"J. K. Kimotho, T. Meyer, and W. Sextro, “PEM fuel cell prognostics using particle filter with model parameter adaptation,” in <i>Prognostics and Health Management (PHM), 2014 IEEE Conference on</i>, 2014, pp. 1–6.","chicago":"Kimotho, James Kuria , Tobias Meyer, and Walter Sextro. “PEM Fuel Cell Prognostics Using Particle Filter with Model Parameter Adaptation.” In <i>Prognostics and Health Management (PHM), 2014 IEEE Conference On</i>, 1–6, 2014. <a href=\"https://doi.org/10.1109/ICPHM.2014.7036406\">https://doi.org/10.1109/ICPHM.2014.7036406</a>.","ama":"Kimotho JK, Meyer T, Sextro W. PEM fuel cell prognostics using particle filter with model parameter adaptation. In: <i>Prognostics and Health Management (PHM), 2014 IEEE Conference On</i>. ; 2014:1-6. doi:<a href=\"https://doi.org/10.1109/ICPHM.2014.7036406\">10.1109/ICPHM.2014.7036406</a>","short":"J.K. Kimotho, T. Meyer, W. Sextro, in: Prognostics and Health Management (PHM), 2014 IEEE Conference On, 2014, pp. 1–6.","mla":"Kimotho, James Kuria, et al. “PEM Fuel Cell Prognostics Using Particle Filter with Model Parameter Adaptation.” <i>Prognostics and Health Management (PHM), 2014 IEEE Conference On</i>, 2014, pp. 1–6, doi:<a href=\"https://doi.org/10.1109/ICPHM.2014.7036406\">10.1109/ICPHM.2014.7036406</a>.","bibtex":"@inproceedings{Kimotho_Meyer_Sextro_2014, title={PEM fuel cell prognostics using particle filter with model parameter adaptation}, DOI={<a href=\"https://doi.org/10.1109/ICPHM.2014.7036406\">10.1109/ICPHM.2014.7036406</a>}, booktitle={Prognostics and Health Management (PHM), 2014 IEEE Conference on}, author={Kimotho, James Kuria  and Meyer, Tobias and Sextro, Walter}, year={2014}, pages={1–6} }","apa":"Kimotho, J. K., Meyer, T., &#38; Sextro, W. (2014). PEM fuel cell prognostics using particle filter with model parameter adaptation. In <i>Prognostics and Health Management (PHM), 2014 IEEE Conference on</i> (pp. 1–6). <a href=\"https://doi.org/10.1109/ICPHM.2014.7036406\">https://doi.org/10.1109/ICPHM.2014.7036406</a>"},"title":"PEM fuel cell prognostics using particle filter with model parameter adaptation","doi":"10.1109/ICPHM.2014.7036406","date_updated":"2019-05-20T13:12:27Z","date_created":"2019-05-20T13:11:02Z","author":[{"first_name":"James Kuria ","last_name":"Kimotho","full_name":"Kimotho, James Kuria "},{"first_name":"Tobias","last_name":"Meyer","full_name":"Meyer, Tobias"},{"first_name":"Walter","last_name":"Sextro","id":"21220","full_name":"Sextro, Walter"}],"abstract":[{"text":"Application of prognostics and health management (PHM) in the field of Proton Exchange Membrane (PEM) fuel cells is emerging as an important tool in increasing the reliability and availability of these systems. Though a lot of work is currently being conducted to develop PHM systems for fuel cells, various challenges have been encountered including the self-healing effect after characterization as well as accelerated degradation due to dynamic loading, all which make RUL predictions a difficult task. In this study, a prognostic approach based on adaptive particle filter algorithm is proposed. The novelty of the proposed method lies in the introduction of a self-healing factor after each characterization and the adaption of the degradation model parameters to fit to the changing degradation trend. An ensemble of five different state models based on weighted mean is then developed. The results show that the method is effective in estimating the remaining useful life of PEM fuel cells, with majority of the predictions falling within 5\\% error. The method was employed in the IEEE 2014 PHM Data Challenge and led to our team emerging the winner of the RUL category of the challenge.","lang":"eng"}],"status":"public","publication":"Prognostics and Health Management (PHM), 2014 IEEE Conference on","type":"conference","keyword":["ageing","particle filtering (numerical methods)","proton exchange membrane fuel cells","remaining life assessment","PEM fuel cell prognostics","PHM","RUL predictions","accelerated degradation","adaptive particle filter algorithm","dynamic loading","model parameter adaptation","prognostics and health management","proton exchange membrane fuel cells","remaining useful life estimation","self-healing effect","Adaptation models","Data models","Degradation","Estimation","Fuel cells","Mathematical model","Prognostics and health management"],"language":[{"iso":"eng"}],"_id":"9879","department":[{"_id":"151"}],"user_id":"55222"},{"publication":"Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014","type":"conference","status":"public","abstract":[{"text":"So-called reliability adaptive systems are able to adapt their system behavior based on the current reliability of the system. This allows them to react to changed operating conditions or faults within the system that change the degradation behavior. To implement such reliability adaptation, self-optimization can be used. A self-optimizing system pursues objectives, of which the priorities can be changed at runtime, in turn changing the system behavior. When including system reliability as an objective of the system, it becomes possible to change the system based on the current reliability as well. This capability can be used to control the reliability of the system throughout its operation period in order to achieve a pre-defined or user-selectable system lifetime. This way, optimal planning of maintenance intervals is possible while also using the system capabilities to their full extent. Our proposed control system makes it possible to react to changed degradation behavior by selecting objectives of the self-optimizing system and in turn changing the operating parameters in a closed loop. A two-stage controller is designed which is used to select the currently required priorities of the objectives in order to fulfill the desired usable lifetime. Investigations using a model of an automotive clutch system serve to demonstrate the feasibility of our controller. It is shown that the desired lifetime can be achieved reliably.","lang":"eng"}],"department":[{"_id":"151"}],"user_id":"55222","_id":"9884","language":[{"iso":"eng"}],"keyword":["self-optimization reliability adaptive"],"intvolume":"         5","citation":{"chicago":"Meyer , Tobias, and Walter Sextro. “Closed-Loop Control System for the Reliability of Intelligent Mechatronic Systems.” In <i>Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014</i>, Vol. 5, 2014.","ieee":"T. Meyer  and W. Sextro, “Closed-loop Control System for the Reliability of Intelligent Mechatronic Systems,” in <i>Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014</i>, 2014, vol. 5.","ama":"Meyer  T, Sextro W. Closed-loop Control System for the Reliability of Intelligent Mechatronic Systems. In: <i>Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014</i>. Vol 5. ; 2014.","apa":"Meyer , T., &#38; Sextro, W. (2014). Closed-loop Control System for the Reliability of Intelligent Mechatronic Systems. In <i>Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014</i> (Vol. 5).","mla":"Meyer , Tobias, and Walter Sextro. “Closed-Loop Control System for the Reliability of Intelligent Mechatronic Systems.” <i>Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014</i>, vol. 5, 2014.","bibtex":"@inproceedings{Meyer _Sextro_2014, title={Closed-loop Control System for the Reliability of Intelligent Mechatronic Systems}, volume={5}, booktitle={Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014}, author={Meyer , Tobias and Sextro, Walter}, year={2014} }","short":"T. Meyer , W. Sextro, in: Proceedings of the Second European Conference of the Prognostics and Health Management Society 2014, 2014."},"year":"2014","volume":5,"date_created":"2019-05-20T13:18:20Z","author":[{"first_name":"Tobias","last_name":"Meyer ","full_name":"Meyer , Tobias"},{"first_name":"Walter","full_name":"Sextro, Walter","last_name":"Sextro"}],"date_updated":"2019-05-20T13:19:08Z","title":"Closed-loop Control System for the Reliability of Intelligent Mechatronic Systems"},{"doi":"10.1016/j.protcy.2014.09.033","title":"Method to Identify Dependability Objectives in Multiobjective Optimization Problem","volume":15,"author":[{"full_name":"Meyer , Tobias","last_name":"Meyer ","first_name":"Tobias"},{"first_name":"Christoph","last_name":"Sondermann-Wölke","full_name":"Sondermann-Wölke, Christoph"},{"first_name":"Walter","id":"21220","full_name":"Sextro, Walter","last_name":"Sextro"}],"date_created":"2019-05-20T13:19:37Z","date_updated":"2019-09-16T10:22:04Z","page":"46-53","intvolume":"        15","citation":{"ieee":"T. Meyer , C. Sondermann-Wölke, and W. Sextro, “Method to Identify Dependability Objectives in Multiobjective Optimization Problem,” <i>Conference Proceedings of the 2nd International Conference on System-Integrated Intelligence</i>, vol. 15, pp. 46–53, 2014.","chicago":"Meyer , Tobias, Christoph Sondermann-Wölke, and Walter Sextro. “Method to Identify Dependability Objectives in Multiobjective Optimization Problem.” <i>Conference Proceedings of the 2nd International Conference on System-Integrated Intelligence</i> 15 (2014): 46–53. <a href=\"https://doi.org/10.1016/j.protcy.2014.09.033\">https://doi.org/10.1016/j.protcy.2014.09.033</a>.","ama":"Meyer  T, Sondermann-Wölke C, Sextro W. Method to Identify Dependability Objectives in Multiobjective Optimization Problem. <i>Conference Proceedings of the 2nd International Conference on System-Integrated Intelligence</i>. 2014;15:46-53. doi:<a href=\"https://doi.org/10.1016/j.protcy.2014.09.033\">10.1016/j.protcy.2014.09.033</a>","bibtex":"@article{Meyer _Sondermann-Wölke_Sextro_2014, title={Method to Identify Dependability Objectives in Multiobjective Optimization Problem}, volume={15}, DOI={<a href=\"https://doi.org/10.1016/j.protcy.2014.09.033\">10.1016/j.protcy.2014.09.033</a>}, journal={Conference Proceedings of the 2nd International Conference on System-Integrated Intelligence}, author={Meyer , Tobias and Sondermann-Wölke, Christoph and Sextro, Walter}, year={2014}, pages={46–53} }","mla":"Meyer , Tobias, et al. “Method to Identify Dependability Objectives in Multiobjective Optimization Problem.” <i>Conference Proceedings of the 2nd International Conference on System-Integrated Intelligence</i>, vol. 15, 2014, pp. 46–53, doi:<a href=\"https://doi.org/10.1016/j.protcy.2014.09.033\">10.1016/j.protcy.2014.09.033</a>.","short":"T. Meyer , C. Sondermann-Wölke, W. Sextro, Conference Proceedings of the 2nd International Conference on System-Integrated Intelligence 15 (2014) 46–53.","apa":"Meyer , T., Sondermann-Wölke, C., &#38; Sextro, W. (2014). Method to Identify Dependability Objectives in Multiobjective Optimization Problem. <i>Conference Proceedings of the 2nd International Conference on System-Integrated Intelligence</i>, <i>15</i>, 46–53. <a href=\"https://doi.org/10.1016/j.protcy.2014.09.033\">https://doi.org/10.1016/j.protcy.2014.09.033</a>"},"year":"2014","quality_controlled":"1","language":[{"iso":"eng"}],"keyword":["Self-optimization","multiobjective optimization","objective function","dependability","intelligent system","behavior adaptation"],"department":[{"_id":"151"}],"user_id":"55222","_id":"9885","status":"public","abstract":[{"lang":"eng","text":"Intelligent mechatronic systems, such as self-optimizing systems, allow an adaptation of the system behavior at runtime based on the current situation. To do so, they generally select among several pre-defined working points. A common method to determine working points for a mechatronic system is to use model-based multiobjective optimization. It allows finding compromises among conflicting objectives, called objective functions, by adapting parameters. To evaluate the system behavior for different parameter sets, a model of the system behavior is included in the objective functions and is evaluated during each function call. Intelligent mechatronic systems also have the ability to adapt their behavior based on their current reliability, thus increasing their availability, or on changed safety requirements; all of which are summed up by the common term dependability. To allow this adaptation, dependability can be considered in multiobjective optimization by including dependability-related objective functions. However, whereas performance-related objective functions are easily found, formulation of dependability-related objective functions is highly system-specific and not intuitive, making it complex and error-prone. Since each mechatronic system is different, individual failure modes have to be taken into account, which need to be found using common methods such as Failure-Modes and Effects Analysis or Fault Tree Analysis. Using component degradation models, which again are specific to the system at hand, the main loading factors can be determined. By including these in the model of the system behavior, the relation between working point and dependability can be formulated as an objective function. In our work, this approach is presented in more detail. It is exemplified using an actively actuated single plate dry clutch system. Results show that this approach is suitable for formulating dependability-related objective functions and that these can be used to extend system lifetime by adapting system behavior."}],"publication":"Conference Proceedings of the 2nd International Conference on System-Integrated Intelligence","type":"journal_article"},{"type":"conference","publication":"2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)","status":"public","_id":"10677","user_id":"3118","department":[{"_id":"78"}],"keyword":["Linux","cache storage","embedded systems","granular computing","multiprocessing systems","reconfigurable architectures","Leon3 SPARe processor","custom logic events","evolvable-self-adaptable processor cache","fine granular profiling","integer unit events","measurement infrastructure","microarchitectural events","multicore embedded system","perf_event standard Linux performance measurement interface","processor properties","run-time reconfigurable memory-to-cache address mapping engine","run-time reconfigurable multicore infrastructure","split-level caching","Field programmable gate arrays","Frequency locked loops","Irrigation","Phasor measurement units","Registers","Weaving"],"language":[{"iso":"eng"}],"year":"2014","citation":{"bibtex":"@inproceedings{Ho_Kaufmann_Platzner_2014, title={Towards self-adaptive caches: A run-time reconfigurable multi-core infrastructure}, DOI={<a href=\"https://doi.org/10.1109/ICES.2014.7008719\">10.1109/ICES.2014.7008719</a>}, booktitle={2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)}, author={Ho, Nam and Kaufmann, Paul and Platzner, Marco}, year={2014}, pages={31–37} }","mla":"Ho, Nam, et al. “Towards Self-Adaptive Caches: A Run-Time Reconfigurable Multi-Core Infrastructure.” <i>2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)</i>, 2014, pp. 31–37, doi:<a href=\"https://doi.org/10.1109/ICES.2014.7008719\">10.1109/ICES.2014.7008719</a>.","short":"N. Ho, P. Kaufmann, M. Platzner, in: 2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES), 2014, pp. 31–37.","apa":"Ho, N., Kaufmann, P., &#38; Platzner, M. (2014). Towards self-adaptive caches: A run-time reconfigurable multi-core infrastructure. In <i>2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)</i> (pp. 31–37). <a href=\"https://doi.org/10.1109/ICES.2014.7008719\">https://doi.org/10.1109/ICES.2014.7008719</a>","ama":"Ho N, Kaufmann P, Platzner M. Towards self-adaptive caches: A run-time reconfigurable multi-core infrastructure. In: <i>2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)</i>. ; 2014:31-37. doi:<a href=\"https://doi.org/10.1109/ICES.2014.7008719\">10.1109/ICES.2014.7008719</a>","chicago":"Ho, Nam, Paul Kaufmann, and Marco Platzner. “Towards Self-Adaptive Caches: A Run-Time Reconfigurable Multi-Core Infrastructure.” In <i>2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)</i>, 31–37, 2014. <a href=\"https://doi.org/10.1109/ICES.2014.7008719\">https://doi.org/10.1109/ICES.2014.7008719</a>.","ieee":"N. Ho, P. Kaufmann, and M. Platzner, “Towards self-adaptive caches: A run-time reconfigurable multi-core infrastructure,” in <i>2014 {IEEE} Intl. Conf. on Evolvable Systems (ICES)</i>, 2014, pp. 31–37."},"page":"31-37","date_updated":"2022-01-06T06:50:49Z","author":[{"full_name":"Ho, Nam","last_name":"Ho","first_name":"Nam"},{"last_name":"Kaufmann","full_name":"Kaufmann, Paul","first_name":"Paul"},{"first_name":"Marco","last_name":"Platzner","full_name":"Platzner, Marco","id":"398"}],"date_created":"2019-07-10T11:23:00Z","title":"Towards self-adaptive caches: A run-time reconfigurable multi-core infrastructure","doi":"10.1109/ICES.2014.7008719"},{"date_created":"2019-09-19T12:14:55Z","author":[{"last_name":"Sjöklint","full_name":"Sjöklint, Mimmi","first_name":"Mimmi"},{"first_name":"Ioanna","last_name":"Constantiou","full_name":"Constantiou, Ioanna"},{"first_name":"Matthias","full_name":"Trier, Matthias","id":"72744","last_name":"Trier"}],"date_updated":"2022-01-06T06:51:33Z","publisher":"Association for Information Systems. AIS Electronic Library (AISeL)","title":"Numerical Representations and User Behaviour in Social Networking Sites: Towards a Multi- Theoretical Research Framework","publication_identifier":{"isbn":["9783834924421"]},"citation":{"apa":"Sjöklint, M., Constantiou, I., &#38; Trier, M. (2013). Numerical Representations and User Behaviour in Social Networking Sites: Towards a Multi- Theoretical Research Framework. In <i>ECIS 2013 Proceedings</i>. Association for Information Systems. AIS Electronic Library (AISeL).","short":"M. Sjöklint, I. Constantiou, M. Trier, in: ECIS 2013 Proceedings, Association for Information Systems. AIS Electronic Library (AISeL), 2013.","bibtex":"@inproceedings{Sjöklint_Constantiou_Trier_2013, title={Numerical Representations and User Behaviour in Social Networking Sites: Towards a Multi- Theoretical Research Framework}, booktitle={ECIS 2013 Proceedings}, publisher={Association for Information Systems. AIS Electronic Library (AISeL)}, author={Sjöklint, Mimmi and Constantiou, Ioanna and Trier, Matthias}, year={2013} }","mla":"Sjöklint, Mimmi, et al. “Numerical Representations and User Behaviour in Social Networking Sites: Towards a Multi- Theoretical Research Framework.” <i>ECIS 2013 Proceedings</i>, Association for Information Systems. AIS Electronic Library (AISeL), 2013.","ama":"Sjöklint M, Constantiou I, Trier M. Numerical Representations and User Behaviour in Social Networking Sites: Towards a Multi- Theoretical Research Framework. In: <i>ECIS 2013 Proceedings</i>. Association for Information Systems. AIS Electronic Library (AISeL); 2013.","ieee":"M. Sjöklint, I. Constantiou, and M. Trier, “Numerical Representations and User Behaviour in Social Networking Sites: Towards a Multi- Theoretical Research Framework,” in <i>ECIS 2013 Proceedings</i>, 2013.","chicago":"Sjöklint, Mimmi, Ioanna Constantiou, and Matthias Trier. “Numerical Representations and User Behaviour in Social Networking Sites: Towards a Multi- Theoretical Research Framework.” In <i>ECIS 2013 Proceedings</i>. Association for Information Systems. AIS Electronic Library (AISeL), 2013."},"year":"2013","department":[{"_id":"198"}],"user_id":"62809","_id":"13324","language":[{"iso":"eng"}],"keyword":["User Behaviour","Social Networking Sites","Numerical Representations","Multi-Theoretical Framework","Quantified Self","Pointification"],"publication":"ECIS 2013 Proceedings","type":"conference","status":"public","abstract":[{"text":"The new technological enhancements and the accessibility to varieties of online applications, enable users to collect personal data and perform self-evaluation through test, comparison and experimentation. The sparked interest in numbers and numbers as self-representative visualisations is prominent in social networking sites, which are the empirical setting for the present study. This paper sets out to establish a multi-theoretical framework which enables the investigation of emerging phenomena of the role of numbers in social networking sites. The proposed framework rests on three theoretical pillars: self-determination theory, heuristic decision making and behavioural economics. A discussion departs from these convictions to investigate user reactions and behaviour when faced with numerical representations in the SNS.","lang":"eng"}]},{"title":"DoA-Based Microphone Array Position Self-Calibration Using Circular Statistic","date_created":"2019-07-12T05:29:07Z","year":"2013","quality_controlled":"1","keyword":["Geometry calibration","microphone arrays","position self-calibration"],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"In this paper we propose an approach to retrieve the absolute geometry of an acoustic sensor network, consisting of spatially distributed microphone arrays, from reverberant speech input. The calibration relies on direction of arrival measurements of the individual arrays. The proposed calibration algorithm is derived from a maximum-likelihood approach employing circular statistics. Since a sensor node consists of a microphone array with known intra-array geometry, we are able to obtain an absolute geometry estimate, including angles and distances. Simulation results demonstrate the effectiveness of the approach."}],"publication":"38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)","doi":"10.1109/ICASSP.2013.6637620","main_file_link":[{"url":"https://groups.uni-paderborn.de/nt/pubs/2013/JacSchHae_ICASSP2013_Rev2.pdf","open_access":"1"}],"oa":"1","date_updated":"2023-10-26T08:11:12Z","author":[{"first_name":"Florian","full_name":"Jacob, Florian","last_name":"Jacob"},{"full_name":"Schmalenstroeer, Joerg","id":"460","last_name":"Schmalenstroeer","first_name":"Joerg"},{"id":"242","full_name":"Haeb-Umbach, Reinhold","last_name":"Haeb-Umbach","first_name":"Reinhold"}],"page":"116-120","citation":{"chicago":"Jacob, Florian, Joerg Schmalenstroeer, and Reinhold Haeb-Umbach. “DoA-Based Microphone Array Position Self-Calibration Using Circular Statistic.” In <i>38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>, 116–20, 2013. <a href=\"https://doi.org/10.1109/ICASSP.2013.6637620\">https://doi.org/10.1109/ICASSP.2013.6637620</a>.","ieee":"F. Jacob, J. Schmalenstroeer, and R. Haeb-Umbach, “DoA-Based Microphone Array Position Self-Calibration Using Circular Statistic,” in <i>38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>, 2013, pp. 116–120, doi: <a href=\"https://doi.org/10.1109/ICASSP.2013.6637620\">10.1109/ICASSP.2013.6637620</a>.","ama":"Jacob F, Schmalenstroeer J, Haeb-Umbach R. DoA-Based Microphone Array Position Self-Calibration Using Circular Statistic. In: <i>38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>. ; 2013:116-120. doi:<a href=\"https://doi.org/10.1109/ICASSP.2013.6637620\">10.1109/ICASSP.2013.6637620</a>","mla":"Jacob, Florian, et al. “DoA-Based Microphone Array Position Self-Calibration Using Circular Statistic.” <i>38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>, 2013, pp. 116–20, doi:<a href=\"https://doi.org/10.1109/ICASSP.2013.6637620\">10.1109/ICASSP.2013.6637620</a>.","short":"F. Jacob, J. Schmalenstroeer, R. Haeb-Umbach, in: 38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013), 2013, pp. 116–120.","bibtex":"@inproceedings{Jacob_Schmalenstroeer_Haeb-Umbach_2013, title={DoA-Based Microphone Array Position Self-Calibration Using Circular Statistic}, DOI={<a href=\"https://doi.org/10.1109/ICASSP.2013.6637620\">10.1109/ICASSP.2013.6637620</a>}, booktitle={38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)}, author={Jacob, Florian and Schmalenstroeer, Joerg and Haeb-Umbach, Reinhold}, year={2013}, pages={116–120} }","apa":"Jacob, F., Schmalenstroeer, J., &#38; Haeb-Umbach, R. (2013). DoA-Based Microphone Array Position Self-Calibration Using Circular Statistic. <i>38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)</i>, 116–120. <a href=\"https://doi.org/10.1109/ICASSP.2013.6637620\">https://doi.org/10.1109/ICASSP.2013.6637620</a>"},"publication_identifier":{"issn":["1520-6149"]},"related_material":{"link":[{"relation":"supplementary_material","description":"Presentation","url":"https://groups.uni-paderborn.de/nt/pubs/2013/JaScHa13_Presentation.pdf"}]},"_id":"11832","department":[{"_id":"54"}],"user_id":"460","status":"public","type":"conference"},{"year":"2013","citation":{"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} }","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.","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.","ama":"Kosi U, Koren J, Valentincic A. Does Financial Statement Audit Reduce the Cost of Debt of Private Firms? In: ; 2013."},"date_updated":"2023-01-17T13:51:24Z","author":[{"first_name":"Urska","last_name":"Kosi","full_name":"Kosi, Urska","id":"54068"},{"last_name":"Koren","full_name":"Koren, Jerney","first_name":"Jerney"},{"first_name":"Aljosa","last_name":"Valentincic","full_name":"Valentincic, Aljosa"}],"date_created":"2023-01-17T13:25:30Z","title":"Does Financial Statement Audit Reduce the Cost of Debt of Private Firms?","main_file_link":[{"url":"https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2373987"}],"conference":{"location":"Paris, France","end_date":"2013-05-05","start_date":"2013-05-02","name":"36th Annual Congress of European Accounting Association"},"type":"conference","abstract":[{"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.","lang":"eng"}],"status":"public","_id":"37109","user_id":"88603","department":[{"_id":"635"},{"_id":"186"},{"_id":"551"}],"keyword":["private firms","voluntary audit","cost of debt","self-selection bias","lemon problem"],"language":[{"iso":"eng"}],"extern":"1"},{"status":"public","publication":"{Proceedings of the 8th International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}","type":"conference","keyword":["model-driven performance engineering","self-*","Self-adaptation","software performance"],"_id":"22737","user_id":"4870","year":"2012","place":"New York, NY, USA","page":"117-122","citation":{"apa":"Becker, M., Luckey, M., &#38; Becker, S. (2012). Model-driven Performance Engineering of Self-adaptive Systems: A Survey. In <i>{Proceedings of the 8th International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}</i> (pp. 117–122). New York, NY, USA: ACM. <a href=\"https://doi.org/10.1145/2304696.2304716\">https://doi.org/10.1145/2304696.2304716</a>","bibtex":"@inproceedings{Becker_Luckey_Becker_2012, place={New York, NY, USA}, title={Model-driven Performance Engineering of Self-adaptive Systems: A Survey}, DOI={<a href=\"https://doi.org/10.1145/2304696.2304716\">10.1145/2304696.2304716</a>}, booktitle={{Proceedings of the 8th International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}}, publisher={ACM}, author={Becker, Matthias and Luckey, Markus and Becker, Steffen}, year={2012}, pages={117–122} }","short":"M. Becker, M. Luckey, S. Becker, in: {Proceedings of the 8th International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}, ACM, New York, NY, USA, 2012, pp. 117–122.","mla":"Becker, Matthias, et al. “Model-Driven Performance Engineering of Self-Adaptive Systems: A Survey.” <i>{Proceedings of the 8th International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}</i>, ACM, 2012, pp. 117–22, doi:<a href=\"https://doi.org/10.1145/2304696.2304716\">10.1145/2304696.2304716</a>.","ieee":"M. Becker, M. Luckey, and S. Becker, “Model-driven Performance Engineering of Self-adaptive Systems: A Survey,” in <i>{Proceedings of the 8th International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}</i>, 2012, pp. 117–122.","chicago":"Becker, Matthias, Markus Luckey, and Steffen Becker. “Model-Driven Performance Engineering of Self-Adaptive Systems: A Survey.” In <i>{Proceedings of the 8th International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}</i>, 117–22. New York, NY, USA: ACM, 2012. <a href=\"https://doi.org/10.1145/2304696.2304716\">https://doi.org/10.1145/2304696.2304716</a>.","ama":"Becker M, Luckey M, Becker S. Model-driven Performance Engineering of Self-adaptive Systems: A Survey. In: <i>{Proceedings of the 8th International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}</i>. New York, NY, USA: ACM; 2012:117-122. doi:<a href=\"https://doi.org/10.1145/2304696.2304716\">10.1145/2304696.2304716</a>"},"publication_identifier":{"isbn":["978-1-4503-1346-9"]},"title":"Model-driven Performance Engineering of Self-adaptive Systems: A Survey","doi":"10.1145/2304696.2304716","date_updated":"2022-01-06T06:55:39Z","publisher":"ACM","author":[{"first_name":"Matthias","full_name":"Becker, Matthias","last_name":"Becker"},{"first_name":"Markus","last_name":"Luckey","full_name":"Luckey, Markus"},{"full_name":"Becker, Steffen","last_name":"Becker","first_name":"Steffen"}],"date_created":"2021-07-15T08:38:08Z"},{"keyword":["Services","Remote services","Self-services","Technology mediation"],"language":[{"iso":"eng"}],"publication":"Technovation","abstract":[{"lang":"eng","text":"The role of information and communication technology for economic growth has been emphasized repeatedly. Technological breakthroughs have generated new forms of services, such as self-services or remote services. Although these encounters are qualitatively different from traditional service provision, prior service management literature thus far had paid little attention to theory development and the systematization of technology-based service encounters. To fill this research gap, the present study outlines how new types of technology-based services fit into existing service typologies and provides an extension of existing frameworks to capture their unique characteristics. These insights in turn offer managerial implications and highlight open research questions."}],"publisher":"Elsevier","date_created":"2018-11-16T09:43:45Z","title":"Technology Mediation in Service Delivery: A New Typology and an Agenda for Managers and Academics.","issue":"2","year":"2012","_id":"5718","user_id":"37741","department":[{"_id":"181"}],"article_type":"original","type":"journal_article","status":"public","date_updated":"2022-01-06T07:02:37Z","author":[{"first_name":"Jan H","last_name":"Schumann","full_name":"Schumann, Jan H"},{"full_name":"Wünderlich, Nancy","id":"36392","last_name":"Wünderlich","first_name":"Nancy"},{"full_name":"Wangenheim, Florian","last_name":"Wangenheim","first_name":"Florian"}],"volume":32,"publication_status":"published","citation":{"mla":"Schumann, Jan H., et al. “Technology Mediation in Service Delivery: A New Typology and an Agenda for Managers and Academics.” <i>Technovation</i>, vol. 32, no. 2, Elsevier, 2012, pp. 133–43.","bibtex":"@article{Schumann_Wünderlich_Wangenheim_2012, title={Technology Mediation in Service Delivery: A New Typology and an Agenda for Managers and Academics.}, volume={32}, number={2}, journal={Technovation}, publisher={Elsevier}, author={Schumann, Jan H and Wünderlich, Nancy and Wangenheim, Florian}, year={2012}, pages={133–143} }","short":"J.H. Schumann, N. Wünderlich, F. Wangenheim, Technovation 32 (2012) 133–143.","apa":"Schumann, J. H., Wünderlich, N., &#38; Wangenheim, F. (2012). Technology Mediation in Service Delivery: A New Typology and an Agenda for Managers and Academics. <i>Technovation</i>, <i>32</i>(2), 133–143.","ieee":"J. H. Schumann, N. Wünderlich, and F. Wangenheim, “Technology Mediation in Service Delivery: A New Typology and an Agenda for Managers and Academics.,” <i>Technovation</i>, vol. 32, no. 2, pp. 133–143, 2012.","chicago":"Schumann, Jan H, Nancy Wünderlich, and Florian Wangenheim. “Technology Mediation in Service Delivery: A New Typology and an Agenda for Managers and Academics.” <i>Technovation</i> 32, no. 2 (2012): 133–43.","ama":"Schumann JH, Wünderlich N, Wangenheim F. Technology Mediation in Service Delivery: A New Typology and an Agenda for Managers and Academics. <i>Technovation</i>. 2012;32(2):133-143."},"page":"133-143","intvolume":"        32"},{"title":"Non-perturbing cavitation detection / monitoring in sonochemical reactors","doi":"10.1109/ULTSYM.2012.0284","date_updated":"2022-01-06T07:04:20Z","date_created":"2019-05-13T13:18:49Z","author":[{"full_name":"Bornmann, Peter","last_name":"Bornmann","first_name":"Peter"},{"id":"210","full_name":"Hemsel, Tobias","last_name":"Hemsel","first_name":"Tobias"},{"id":"21220","full_name":"Sextro, Walter","last_name":"Sextro","first_name":"Walter"},{"first_name":"Takafumi","full_name":"Maeda, Takafumi","last_name":"Maeda"},{"first_name":"Takeshi","full_name":"Morita, Takeshi","last_name":"Morita"}],"year":"2012","page":"1141-1144","citation":{"chicago":"Bornmann, Peter, Tobias Hemsel, Walter Sextro, Takafumi Maeda, and Takeshi Morita. “Non-Perturbing Cavitation Detection / Monitoring in Sonochemical Reactors.” In <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>, 1141–44, 2012. <a href=\"https://doi.org/10.1109/ULTSYM.2012.0284\">https://doi.org/10.1109/ULTSYM.2012.0284</a>.","ieee":"P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, and T. Morita, “Non-perturbing cavitation detection / monitoring in sonochemical reactors,” in <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>, 2012, pp. 1141–1144.","ama":"Bornmann P, Hemsel T, Sextro W, Maeda T, Morita T. Non-perturbing cavitation detection / monitoring in sonochemical reactors. In: <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>. ; 2012:1141-1144. doi:<a href=\"https://doi.org/10.1109/ULTSYM.2012.0284\">10.1109/ULTSYM.2012.0284</a>","apa":"Bornmann, P., Hemsel, T., Sextro, W., Maeda, T., &#38; Morita, T. (2012). Non-perturbing cavitation detection / monitoring in sonochemical reactors. In <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i> (pp. 1141–1144). <a href=\"https://doi.org/10.1109/ULTSYM.2012.0284\">https://doi.org/10.1109/ULTSYM.2012.0284</a>","short":"P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, T. Morita, in: Ultrasonics Symposium (IUS), 2012 IEEE International, 2012, pp. 1141–1144.","bibtex":"@inproceedings{Bornmann_Hemsel_Sextro_Maeda_Morita_2012, title={Non-perturbing cavitation detection / monitoring in sonochemical reactors}, DOI={<a href=\"https://doi.org/10.1109/ULTSYM.2012.0284\">10.1109/ULTSYM.2012.0284</a>}, booktitle={Ultrasonics Symposium (IUS), 2012 IEEE International}, author={Bornmann, Peter and Hemsel, Tobias and Sextro, Walter and Maeda, Takafumi and Morita, Takeshi}, year={2012}, pages={1141–1144} }","mla":"Bornmann, Peter, et al. “Non-Perturbing Cavitation Detection / Monitoring in Sonochemical Reactors.” <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>, 2012, pp. 1141–44, doi:<a href=\"https://doi.org/10.1109/ULTSYM.2012.0284\">10.1109/ULTSYM.2012.0284</a>."},"publication_identifier":{"issn":["1948-5719"]},"quality_controlled":"1","keyword":["cavitation","chemical reactors","microphones","process monitoring","reliability","ultrasonic applications","ultrasonic waves","acoustic properties","cavitation based ultrasound applications","cavitation intensity","change detection reliability","external microphone","malfunction detection reliability","nonperturbing cavitation detection","nonperturbing cavitation monitoring","process monitoring","self-sensing ultrasound transducer","sonochemical reactors","sonochemistry","ultrasound cleaning","ultrasound irradiation","Acoustics","Liquids","Monitoring","Sensors","Sonar equipment","Transducers","Ultrasonic imaging"],"language":[{"iso":"eng"}],"_id":"9783","department":[{"_id":"151"}],"user_id":"55222","abstract":[{"lang":"eng","text":"To optimize the ultrasound irradiation for cavitation based ultrasound applications like sonochemistry or ultrasound cleaning, the correlation between cavitation intensity and the resulting effect on the process is of interest. Furthermore, changing conditions like temperature and pressure result in varying acoustic properties of the liquid. That might necessitate an adaption of the ultrasound irradiation. To detect such changes during operation, process monitoring is desired. Labor intensive processes, that might be carried out for several hours, also require process monitoring to increase their reliability by detection of changes or malfunctions during operation. In some applications cavitation detection and monitoring can be achieved by the application of sensors in the sound field. Though the application of sensors is possible, this necessitates modifications on the system and the sensor might disturb the sound field. In other applications harsh, process conditions prohibit the application of sensors in the sound field. Therefore alternative techniques for cavitation detection and monitoring are desired. The applicability of an external microphone and a self-sensing ultrasound transducer for cavitation detection were experimentally investigated. Both methods were found to be suitable and easily applicable."}],"status":"public","publication":"Ultrasonics Symposium (IUS), 2012 IEEE International","type":"conference"}]