@inproceedings{MayrHoferRafoltetal., author = {Mayr, Winfried and Hofer, Christian and Rafolt, Dietmar and Bijak, Manfred and Lanm{\"u}ller, Hermann and Reichel, Martin and Sauermann, Stefan and Unger, Ewald}, title = {The European Project RISE: General Overview and Engineering Aspects}, series = {Proceedings of the 8th Vienna International Workshop on FES}, booktitle = {Proceedings of the 8th Vienna International Workshop on FES}, subject = {Engineering}, language = {en} } @inproceedings{RussoldBijakSauermannetal., author = {Russold, Michael and Bijak, Manfred and Sauermann, Stefan and Reichel, Martin and Rakos, Monika and Mayr, Winfried}, title = {Object oriented Software Components for Multichannel-Stimulator Control}, series = {7th Vienna International Workshop on FES / Department of Biomedical Engineering and Physics, University of Vienna}, booktitle = {7th Vienna International Workshop on FES / Department of Biomedical Engineering and Physics, University of Vienna}, pages = {254 -- 257}, subject = {Stimulator}, language = {en} } @inproceedings{RafoltMayrVetteretal., author = {Rafolt, Dietmar and Mayr, Winfried and Vetter, K. and Gallasch, E. and Bijak, Manfred and Reichel, Martin and Sauermann, Stefan and Lanm{\"u}ller, Hermann and Unger, Ewald and Hofer, Christian}, title = {Saturation of the M-Wave Amplitude with Increasing Stimulation Amplitude}, series = {Proceedings of the 8th Vienna International Workshop on FES}, booktitle = {Proceedings of the 8th Vienna International Workshop on FES}, pages = {122 -- 124}, subject = {Amplitude}, language = {en} } @inproceedings{SauermannBijakReicheletal., author = {Sauermann, Stefan and Bijak, Manfred and Reichel, Martin and Schmutterer, Christoph and Rafolt, Dietmar and Unger, Ewald and Mayr, Winfried and Lanm{\"u}ller, Hermann}, title = {BioSignalizer -A Class Library for Acquisition, Analysis, Display, and Management of Biosignals in Clinical and Experimental Research}, series = {Proceedings / {\"O}sterreichische Computergesellschaft}, booktitle = {Proceedings / {\"O}sterreichische Computergesellschaft}, pages = {143 -- 149}, subject = {Biosignals}, language = {en} } @article{BijakWinfriedRakosetal., author = {Bijak, Manfred and Winfried, Mayr and Rakos, Monika and Hofer, Christian and Lanm{\"u}ller, Hermann and Rafolt, Dietmar and Reichel, Martin and Sauermann, Stefan and Schmutterer, Christoph and Unger, Ewald and Russold, Michael and Kern, Helmut}, title = {The Vienna functional electrical stimulation system for restoration of walking functions in spastic paraplegia}, series = {Artificial Organs}, journal = {Artificial Organs}, number = {26 / 3}, pages = {227}, subject = {Electrical Stimulation}, language = {en} } @inproceedings{ReichelBijakMayretal., author = {Reichel, Martin and Bijak, Manfred and Mayr, Winfried and Lanm{\"u}ller, Hermann and Rafolt, Dietmar and Rakos, Monika and Sauermann, Stefan and Unger, Ewald and Turkof, E.}, title = {Computer Controlled Intraoperative Electroneurodiagnostics}, series = {Proceedings of the World Congress on Neuroinformatics / ARGESIM/ASIM, Wien}, booktitle = {Proceedings of the World Congress on Neuroinformatics / ARGESIM/ASIM, Wien}, pages = {612 -- 616}, subject = {Electrical Stimulation}, language = {en} } @inproceedings{RafoltMayrFreilingeretal., author = {Rafolt, Dietmar and Mayr, Winfried and Freilinger, G. and Bijak, Manfred and Lanm{\"u}ller, Hermann and Reichel, Martin and Sauermann, Stefan and Schmutterer, Christoph and Unger, Ewald and Kozlovskaya, I.}, title = {Application of Functional Electrical Stimulation (FES) for training in Long-Term Space Flights}, series = {Proceedings CD / 18.Congress of the International Society of Biomechanics, Z{\"u}rich}, booktitle = {Proceedings CD / 18.Congress of the International Society of Biomechanics, Z{\"u}rich}, subject = {Electrical Stimulation}, language = {en} } @inproceedings{SauermannBijakRafoltetal., author = {Sauermann, Stefan and Bijak, Manfred and Rafolt, Dietmar and Unger, Ewald and Reichel, Martin and Mayr, Winfried and Lanm{\"u}ller, Hermann}, title = {The BioSignalizer Software for Experimental Work on Functional Electrostimulation of Long-Term Denervated Rabbit Muscle}, series = {Proceedings of the World Congress on Medical Physics and Biomedical Engineering (IFMBE 2003)}, booktitle = {Proceedings of the World Congress on Medical Physics and Biomedical Engineering (IFMBE 2003)}, subject = {Muscle Stimulation}, language = {en} } @inproceedings{SauermannBijakReicheletal., author = {Sauermann, Stefan and Bijak, Manfred and Reichel, Martin and Rafolt, Dietmar and Unger, Ewald and Mayr, Winfried and Lanm{\"u}ller, Hermann}, title = {Automated Estimation of Stimulation Threshold using Single Twitches and Acceleration Sensors}, series = {Proceedings / Department of Biomedical Engineering and Physics, University of Vienna}, booktitle = {Proceedings / Department of Biomedical Engineering and Physics, University of Vienna}, pages = {148 -- 151}, subject = {Electrical Stimulation}, language = {en} } @incollection{SauermannBijakRafoltetal., author = {Sauermann, Stefan and Bijak, Manfred and Rafolt, Dietmar and Unger, Ewald and Reichel, Martin and Mayr, Winfried and Lanm{\"u}ller, Hermann}, title = {Automatisierte Datenerfassung zur Bestimmung optimaler FES Parameter}, series = {Biomedizinische Technik 48. Erg{\"a}nzungsband 1}, booktitle = {Biomedizinische Technik 48. Erg{\"a}nzungsband 1}, publisher = {Fachhochschule Technikum Wien}, pages = {50 -- 51}, subject = {Data Collection}, language = {en} } @inproceedings{ReichelBijakMayretal., author = {Reichel, Martin and Bijak, Manfred and Mayr, Winfried and Lanm{\"u}ller, Hermann and Rafolt, Dietmar and Sauermann, Stefan and Unger, Ewald and Turkof, E.}, title = {Biphasic Stimulation: An Alternative Approach to Minimize the Stimulus Artifact for Diagnostic and for Control Applications}, series = {Proceedings of the 7th Vienna International Workshop on FES / Department of Biomedical Engineering and Physics, University of Vienna}, booktitle = {Proceedings of the 7th Vienna International Workshop on FES / Department of Biomedical Engineering and Physics, University of Vienna}, pages = {122 -- 125}, subject = {Electrical Stimulation}, language = {en} } @inproceedings{MayrFreilingerRafoltetal., author = {Mayr, Winfried and Freilinger, G. and Rafolt, Dietmar and Bijak, Manfred and Girsch, Werner and Hofer, Christian and Lanm{\"u}ller, Hermann and Reichel, Martin and Sauermann, Stefan and Schmutterer, Christoph and Unger, Ewald and Gratchev, V.}, title = {FES as a Countermeasure against Muscular Atrophy in Long-Term Space Flights}, series = {7th Vienna International Workshop on FES / Department of Biomedical Engineering and Physics University of Vienna}, booktitle = {7th Vienna International Workshop on FES / Department of Biomedical Engineering and Physics University of Vienna}, pages = {246 -- 249}, subject = {Electrical Stimulation}, language = {en} } @inproceedings{ReichelBijakMayretal., author = {Reichel, Martin and Bijak, Manfred and Mayr, Winfried and Lanm{\"u}ller, Hermann and Rafolt, Dietmar and Rakos, Monika and Sauermann, Stefan and Unger, Ewald and Turkof, E.}, title = {Mobile PC-System for Intraoperative Electroneurodiagnostics}, series = {Proceedings of the 7th Vienna International Workshop on FES / Vienna, Austria, Department of Biomedical Engineering and Physics, University of Vienna}, booktitle = {Proceedings of the 7th Vienna International Workshop on FES / Vienna, Austria, Department of Biomedical Engineering and Physics, University of Vienna}, pages = {250 -- 253}, subject = {Electroneurodiagnostics}, language = {en} } @inproceedings{SauermannBijakReicheletal., author = {Sauermann, Stefan and Bijak, Manfred and Reichel, Martin and Unger, Ewald and Rakos, Monika and Rafolt, Dietmar and Mayr, Winfried and Lanm{\"u}ller, Hermann}, title = {A Computerized System for Control, Data Aquisition and Online Analyses of Biosignals}, series = {Proceedings ARGESIM/ASIM, Wien}, booktitle = {Proceedings ARGESIM/ASIM, Wien}, pages = {608 -- 611}, subject = {Biosignals}, language = {en} } @inproceedings{BijakMayrRakosetal., author = {Bijak, Manfred and Mayr, Winfried and Rakos, Monika and Hofer, Christian and Lanm{\"u}ller, Hermann and Rafolt, Dietmar and Reichel, Martin and Sauermann, Stefan and Schmutterer, Christoph and Unger, Ewald and Russold, Michael and Kern, Helmut}, title = {The Vienna FES system for restoration of walking functions in spastic paraplegia}, series = {Proceedings of the 7th Vienna International Workshop on Functional Electrical Stimulation}, booktitle = {Proceedings of the 7th Vienna International Workshop on Functional Electrical Stimulation}, subject = {Electrical Stimulation}, language = {en} } @inproceedings{KaufmannHolwegWahletal., author = {Kaufmann, Christian and Holweg, Gerd and Wahl, Harald and Balog, Peter and Mense, Alexander}, title = {Privacy in Web 2.0 Lerning - Experiences with the Acceptance of Working Professional Students}, series = {Privacy in Web 2.0 Lerning - Experiences with the Acceptance of Working Professional Students, Conference on Ubiquitous Learning, Nov. 11-12, 2011, UCB, Berkeley, California, USA}, booktitle = {Privacy in Web 2.0 Lerning - Experiences with the Acceptance of Working Professional Students, Conference on Ubiquitous Learning, Nov. 11-12, 2011, UCB, Berkeley, California, USA}, subject = {Privacy}, language = {en} } @misc{PucherWahlMenseetal., author = {Pucher, Robert and Wahl, Harald and Mense, Alexander and Nimmervoll, Alexander and Hofmann, Alexander and Schm{\"o}llebeck, Fritz}, title = {Didaktik f{\"u}r das Wissenszeitalter}, subject = {Didactics}, language = {de} } @misc{PucherWahlSchmoellebeck, author = {Pucher, Robert and Wahl, Harald and Schm{\"o}llebeck, Fritz}, title = {Integrating undergraduate project based learning in Computer Science with COAST: A research network}, subject = {Project Based Learning}, language = {en} } @inproceedings{WahlMenseNimmervolletal., author = {Wahl, Harald and Mense, Alexander and Nimmervoll, Alexander and Pucher, Robert and Gollner, Helmut and Schm{\"o}llebeck, Fritz}, title = {An innovative combination of non-traditional teaching methods for learning in small groups}, series = {Proceedings of the International Conference PBL2008 ABP}, booktitle = {Proceedings of the International Conference PBL2008 ABP}, subject = {Teaching}, language = {en} } @article{PucherMenseWahletal., author = {Pucher, Robert and Mense, Alexander and Wahl, Harald and Schm{\"o}llebeck, Fritz}, title = {Intrinsic Motivation of Students in Project Based Learning}, series = {The Transactions of the SA Institute of Electrical Engineers}, volume = {94}, journal = {The Transactions of the SA Institute of Electrical Engineers}, number = {3}, pages = {6 -- 9}, subject = {Motivation}, language = {en} } @inproceedings{PucherSchmoellebeckKollmitzeretal., author = {Pucher, Robert and Schm{\"o}llebeck, Fritz and Kollmitzer, Christian and Gollner, Helmut and Balog, Peter and Mense, Alexander and Wahl, Harald}, title = {Design of Master Degree Programs to Meet Todays Business Needs}, series = {Management of Change - 12th Annual EDINEB Conference}, booktitle = {Management of Change - 12th Annual EDINEB Conference}, subject = {University Degree}, language = {en} } @inproceedings{SchmoellebeckKollmitzerPucheretal., author = {Schm{\"o}llebeck, Fritz and Kollmitzer, Christian and Pucher, Robert and Mense, Alexander and Wahl, Harald}, title = {An Interdisciplinary Approach in Educating Future Leaders in a Rapidly Growing European Union}, series = {Proceedings of the EDiNEB XI Conference 2004}, booktitle = {Proceedings of the EDiNEB XI Conference 2004}, subject = {Education}, language = {en} } @misc{WahlPucherMenseetal., author = {Wahl, Harald and Pucher, Robert and Mense, Alexander and Schm{\"o}llebeck, Fritz and Hofmann, Alexander and Nimmervoll, Alexander and Eckkrammer, Florian and Gollner, Helmut}, title = {Do Competitions between Teams in Self-Directed Learning Increase the Performance of Students?}, subject = {Competition}, language = {en} } @inproceedings{PucherBrezowarWahletal., author = {Pucher, Robert and Brezowar, Gabriela and Wahl, Harald and Mense, Alexander and Schm{\"o}llebeck, Fritz}, title = {Is the Performance of Traditional Teaching being Improved by the Use of Audio Files for Mobile Learning?}, series = {Proceedings of the 5th International Conference on Interactive Mobile and Computer Aided Learning}, booktitle = {Proceedings of the 5th International Conference on Interactive Mobile and Computer Aided Learning}, subject = {Mobile Application}, language = {en} } @inproceedings{PucherWahlSchmoellebeck, author = {Pucher, Robert and Wahl, Harald and Schm{\"o}llebeck, Fritz}, title = {Integrating undergraduate project based learning in Computer Science with COAST: A research network}, series = {Proceedings of ICT - Providing choices for learners and learning}, booktitle = {Proceedings of ICT - Providing choices for learners and learning}, subject = {Project Based Learning}, language = {en} } @incollection{HammerlPucherMenseetal., author = {Hammerl, Barbara and Pucher, Robert and Mense, Alexander and Wahl, Harald and Schm{\"o}llebeck, Fritz}, title = {Intrinsic Motivation and Education for Sustainability}, series = {Intrinsic Motivation - An Essential Key to Success}, booktitle = {Intrinsic Motivation - An Essential Key to Success}, publisher = {Icfai University Press}, publisher = {Fachhochschule Technikum Wien}, pages = {60 -- 74}, subject = {Motivation}, language = {en} } @misc{PucherHofmannMenseetal., author = {Pucher, Robert and Hofmann, Alexander and Mense, Alexander and Wahl, Harald and Nimmervoll, Alexander and Brezowar, Gabriela and Schm{\"o}llebeck, Fritz}, title = {Are Human Factors the More Important Factor for the Success of Project-Based Learning?}, subject = {Human Factor}, language = {en} } @inproceedings{WahlPucherHofmannetal., author = {Wahl, Harald and Pucher, Robert and Hofmann, Alexander and Mense, Alexander and Gollner, Helmut and Schm{\"o}llebeck, Fritz}, title = {Handle Team Changes in Student Projects - the Example of the Vienna Cubes}, series = {Proceedings of the International Conference PBL2006ABP}, booktitle = {Proceedings of the International Conference PBL2006ABP}, subject = {Project Based Learning}, language = {en} } @inproceedings{SchmoellebeckKollmitzerPucheretal., author = {Schm{\"o}llebeck, Fritz and Kollmitzer, Christian and Pucher, Robert and Wahl, Harald and Mense, Alexander}, title = {New Architecture and didactics for study programmes in a growing European Union}, series = {PBL 2004 International Conference, Cancun (QuintanaRoo)}, booktitle = {PBL 2004 International Conference, Cancun (QuintanaRoo)}, subject = {Education}, language = {en} } @inproceedings{KaufmannHolwegWahletal., author = {Kaufmann, Christian and Holweg, Gerd and Wahl, Harald and Balog, Peter and Mense, Alexander}, title = {University education in transition - which technical support is needed by part-time students}, series = {Proceedings of the 3rd International Conference on Society and Information Technologies (ICSIT 2012)}, booktitle = {Proceedings of the 3rd International Conference on Society and Information Technologies (ICSIT 2012)}, subject = {Education}, language = {en} } @inproceedings{PucherWahlMenseetal., author = {Pucher, Robert and Wahl, Harald and Mense, Alexander and Schm{\"o}llebeck, Fritz}, title = {How to Motivate Students in Project Based Learning}, series = {10th Annual EDINEB Conference / Impact on Culture and Education on Learning Practices, Salzburg}, booktitle = {10th Annual EDINEB Conference / Impact on Culture and Education on Learning Practices, Salzburg}, subject = {Project Based Learning}, language = {en} } @inproceedings{PucherWahlHofmannetal., author = {Pucher, Robert and Wahl, Harald and Hofmann, Alexander and Schm{\"o}llebeck, Fritz}, title = {Managing large projects with changing students - the example of the roboter soccer team "Vienna Cubes"}, series = {Proceedings of the 22nd ASCILITE Conference Brisbane}, booktitle = {Proceedings of the 22nd ASCILITE Conference Brisbane}, pages = {561 -- 567}, subject = {Teaching}, language = {en} } @article{KaufmannHolwegWahletal., author = {Kaufmann, Christian and Holweg, Gerd and Wahl, Harald and Balog, Peter and Mense, Alexander}, title = {Privacy in Web 2.0 Learning: Experiences with the Acceptance of Working Professional Students}, series = {Ubiquitous Learning: An International Journal}, journal = {Ubiquitous Learning: An International Journal}, number = {Vol 4, Issue 4}, pages = {25 -- 40}, subject = {Web 2.0}, language = {en} } @inproceedings{HammerlPucherMenseetal., author = {Hammerl, Barbara and Pucher, Robert and Mense, Alexander and Wahl, Harald and Schm{\"o}llebeck, Fritz}, title = {Intrinsic motivation of students - the role of proper course design in education for sustainability}, series = {Proceedings of the International Conference EMSU2004 Environmental Management for Sustainable Universities, Monterrey (Mexico)}, booktitle = {Proceedings of the International Conference EMSU2004 Environmental Management for Sustainable Universities, Monterrey (Mexico)}, subject = {Sustainability}, language = {en} } @inproceedings{PucherMenseWahletal., author = {Pucher, Robert and Mense, Alexander and Wahl, Harald and Nimmervoll, Alexander and Hofmann, Alexander and Hammerl, Barbara and Schm{\"o}llebeck, Fritz}, title = {Intrinsic Motivation of Students in PBL Courses}, series = {Proceedings of the International Conference PBL2004 Pleasure by Learning, Cancun (Mexico)}, booktitle = {Proceedings of the International Conference PBL2004 Pleasure by Learning, Cancun (Mexico)}, subject = {Problem Based Learning}, language = {en} } @inproceedings{NimmervollPucherWahletal., author = {Nimmervoll, Alexander and Pucher, Robert and Wahl, Harald and Gollner, Helmut and Schm{\"o}llebeck, Fritz}, title = {Personal PBL Experiences with Theoretical Computer Science Lectures}, series = {Proceedings of the International Conference PBL2008 ABP}, booktitle = {Proceedings of the International Conference PBL2008 ABP}, subject = {Problem Based Learning}, language = {en} } @inproceedings{PucherBrezowarWahletal., author = {Pucher, Robert and Brezowar, Gabriela and Wahl, Harald and Mense, Alexander and Schm{\"o}llebeck, Fritz}, title = {User centered design in software projects - can it be taught?}, series = {Proceedings of the International Conference on Computer-Aided Blended Learning (ICBL 2008)}, booktitle = {Proceedings of the International Conference on Computer-Aided Blended Learning (ICBL 2008)}, subject = {User Centred Design}, language = {en} } @inproceedings{KaufmannWahlMenseetal., author = {Kaufmann, Christian and Wahl, Harald and Mense, Alexander and Sommer, Thomas}, title = {The acceptance of eLearning methods of extra occupational and full-time students}, series = {Proceedings of S-ICT2008 Student Mobility and ICT / Can E-LEARNING overcome barriers of Life-Long learning? / Maastricht University (Netherlands)}, booktitle = {Proceedings of S-ICT2008 Student Mobility and ICT / Can E-LEARNING overcome barriers of Life-Long learning? / Maastricht University (Netherlands)}, subject = {eLearning}, language = {en} } @misc{WahlMenseNimmervolletal., author = {Wahl, Harald and Mense, Alexander and Nimmervoll, Alexander and Pucher, Robert and Gollner, Helmut and Schm{\"o}llebeck, Fritz}, title = {An innovative combination of non-traditional teaching methods for learning in small groups}, subject = {Teaching}, language = {en} } @misc{WahlGollnerKaufmannetal., author = {Wahl, Harald and Gollner, Helmut and Kaufmann, Christian and Mense, Alexander and Pucher, Robert and Schm{\"o}llebeck, Fritz}, title = {A Set of Consecutive Courses in Business Informatics to help IT Professionals being Successful}, subject = {Business Informatics}, language = {en} } @inproceedings{PucherMenseWahletal., author = {Pucher, Robert and Mense, Alexander and Wahl, Harald and Schm{\"o}llebeck, Fritz}, title = {Project Based Learning and the Intrinsic Motivation of Students}, series = {Abstractbook of the 10th Annual EDINEB Conference "Impact on Culture and Education on Learning Practices", Salzburg (Austria)}, booktitle = {Abstractbook of the 10th Annual EDINEB Conference "Impact on Culture and Education on Learning Practices", Salzburg (Austria)}, subject = {Project Based Learning}, language = {en} } @inproceedings{PucherWahlMense, author = {Pucher, Robert and Wahl, Harald and Mense, Alexander}, title = {How to motivate Students in Project Based Learning}, series = {Tagungsband der Africon 2002 (IEEE Group 8) / George, RSA}, booktitle = {Tagungsband der Africon 2002 (IEEE Group 8) / George, RSA}, subject = {Project Based Learning}, language = {en} } @article{WidhalmGoeschkaKastner, author = {Widhalm, Dominik and Goeschka, Karl M. and Kastner, Wolfgang}, title = {A Review on Immune-Inspired Node Fault Detection in Wireless Sensor Networks with a Focus on the Danger Theory}, series = {Sensors}, volume = {23}, journal = {Sensors}, number = {3}, doi = {10.3390/s23031166}, abstract = {The use of fault detection and tolerance measures in wireless sensor networks is inevitable to ensure the reliability of the data sources. In this context, immune-inspired concepts offer suitable characteristics for developing lightweight fault detection systems, and previous works have shown promising results. In this article, we provide a literature review of immune-inspired fault detection approaches in sensor networks proposed in the last two decades. We discuss the unique properties of the human immune system and how the found approaches exploit them. With the information from the literature review extended with the findings of our previous works, we discuss the limitations of current approaches and consequent future research directions. We have found that immune-inspired techniques are well suited for lightweight fault detection, but there are still open questions concerning the effective and efficient use of those in sensor networks.}, subject = {fault detection}, language = {en} } @article{HimmelstossJungmayer, author = {Himmelstoß, Felix and Jungmayer, Michael}, title = {Resonante ZCS Konverter mit beschr{\"a}nktem Arbeitsbereich}, series = {e \& i Elektrotechnik und Informationstechnik}, journal = {e \& i Elektrotechnik und Informationstechnik}, number = {140}, doi = {10.1007/s00502-022-01113-1}, pages = {123 -- 131}, abstract = {DC/DC-Konverter wandeln eine Eingangsspannung in eine Ausgangsspannung. In diesem Beitrag werden drei solche Konverter behandelt, die aus den drei Grundschaltungen hergeleitet sind. Im Gegensatz zu den Originalstrukturen sind diese nur f{\"u}r einen geringeren Spannungs{\"u}bersetzungsbereich geeignet, haben aber den Vorteil, dass die elektronischen Schalter immer bei Strom null schalten und die Dioden nicht zwangsweise, sondern immer von selbst ausschalten. Die Gewinnung der Konverterschaltungen wird erl{\"a}utert, und die Funktionsweisen werden durch mathematische Beschreibung, durch Skizzen und mithilfe des uZ-i-Diagramms erkl{\"a}rt. Weiters werden einige m{\"o}gliche Erweiterungen der Schaltungen gezeigt.}, subject = {DC/DC-Konverter}, language = {de} } @article{VotziHimmelstossErtl, author = {Votzi, Helmut and Himmelstoß, Felix and Ertl, Hans}, title = {Active Hybrid Filter Applied with a Multi-Cell Switch-Mode Power Amplifier}, series = {Power Electronics and Motion Control PEMC 2018, 27-29 August 2018, Budapest, Hungary}, journal = {Power Electronics and Motion Control PEMC 2018, 27-29 August 2018, Budapest, Hungary}, subject = {Amplifier}, language = {en} }