@inproceedings{KhaledReichlingBruhnsetal., author = {Khaled, W. and Reichling, S. and Bruhns, Otto T. and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Baumann, Michael and B{\"o}se, Holger and Klein, Dagmar and Freimuth, Herbert and Tunayar, A. and Lorenz, A. and Pessavento, A. and Ermert, Helmut}, title = {Palpation imaging using a haptic system for virtual reality applications in medicine}, series = {Perspective in image-guided surgery : proceedings of the Scientific Workshop on Medical Robotics, Navigation, and Visualization : RheinAhrCampus Remagen, Germany, 11-12 March}, booktitle = {Perspective in image-guided surgery : proceedings of the Scientific Workshop on Medical Robotics, Navigation, and Visualization : RheinAhrCampus Remagen, Germany, 11-12 March}, publisher = {World Scientific Publ.}, address = {Singapore}, pages = {407 -- 414}, language = {en} } @inproceedings{KhaledReichlingBruhnsetal., author = {Khaled, W. and Reichling, S. and Bruhns, Otto T. and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Baumann, Michael and B{\"o}se, Holger and Klein, Dagmar and Freimuth, Herbert and Tunayar, A. and Lorenz, A. and Pessavento, A. and Ermert, Helmut}, title = {Palpation Imaging using a Haptic System for Virtual Reality Applications in Medicine}, series = {Proceedings of the 12th Annual Medicine Meets Virtual Reality Conference: - Building a Better You: The Next Tools for Medical Education, Diagnosis, and Care. - Medicine Meets Virtual Reality (MMVR) - Newport Beach (California, USA). 2004}, booktitle = {Proceedings of the 12th Annual Medicine Meets Virtual Reality Conference: - Building a Better You: The Next Tools for Medical Education, Diagnosis, and Care. - Medicine Meets Virtual Reality (MMVR) - Newport Beach (California, USA). 2004}, language = {en} } @inproceedings{KhaledBruhnsReichlingetal., author = {Khaled, W. and Bruhns, Otto T. and Reichling, S. and B{\"o}se, Holger and Baumann, Michael and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Meier, Alexander and Freimuth, Herbert and Tunayar, A. and Ermert, Helmut}, title = {A New Haptic Sensor Actuator System for Virtual Reality Applications in Medicine}, series = {Medical Image Computing and Computer-Assisted Intervention - MICCAI 2003: 6th International Conference, Montr{\´e}al, Canada, November 15-18, 2003, Proceedings}, booktitle = {Medical Image Computing and Computer-Assisted Intervention - MICCAI 2003: 6th International Conference, Montr{\´e}al, Canada, November 15-18, 2003, Proceedings}, publisher = {Springer}, isbn = {978-3540204626}, pages = {132 -- 140}, language = {en} } @article{KhaledBruhnsReichlingetal., author = {Khaled, W. and Bruhns, Otto T. and Reichling, S. and B{\"o}se, Holger and Baumann, Michael and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Meier, Alexander and Klein, Dagmar and Freimuth, Herbert and Ermert, Helmut}, title = {A haptic system for virtual reality applications based on ultrasound elastography and electrorheological fluids}, series = {Acoustical Imaging}, journal = {Acoustical Imaging}, number = {27}, publisher = {Kluver Academic}, address = {Dordrecht \& New York}, doi = {10.1007/978-1-4020-2402-3_85}, pages = {667 -- 675}, language = {en} } @inproceedings{KhaledReichlingBruhnsetal., author = {Khaled, W. and Reichling, S. and Bruhns, Otto T. and Ermert, Helmut and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Baumann, Michael and B{\"o}se, Holger and Freimuth, Herbert and Tunayar, A.}, title = {Palpation imaging using a haptic sensor actuator system for medical applications}, series = {Actuator 2004 : 9th International Conference on New Actuators \& 3rd International Exhibition on Smart Actuators and Drive Systems, 14-16 June 2004, Bremen, Germany}, booktitle = {Actuator 2004 : 9th International Conference on New Actuators \& 3rd International Exhibition on Smart Actuators and Drive Systems, 14-16 June 2004, Bremen, Germany}, publisher = {HVG Hanseatische Veranstaltungs-GmbH}, address = {Bremen}, pages = {379 -- 382}, language = {en} } @article{MayerRabindranathBoerneretal., author = {Mayer, Matthias and Rabindranath, Raman and B{\"o}rner, Juliane and H{\"o}rner, Eva and Bentz, Alexander and Salgado, Josefina and Han, Hong and B{\"o}se, Holger and Probst, J{\"o}rn and Shamonin (Chamonine), Mikhail and Monkman, Gareth J. and Schlunck, G{\"u}nther}, title = {Ultra-Soft PDMS-Based Magnetoactive Elastomers as Dynamic Cell Culture Substrata}, series = {PLoS ONE}, volume = {8}, journal = {PLoS ONE}, number = {10}, publisher = {PLOS}, doi = {10.1371/journal.pone.0076196}, abstract = {Mechanical cues such as extracellular matrix stiffness and movement have a major impact on cell differentiation and function. To replicate these biological features in vitro, soft substrata with tunable elasticity and the possibility for controlled surface translocation are desirable. Here we report on the use of ultra-soft (Young's modulus <100 kPa) PDMS-based magnetoactive elastomers (MAE) as suitable cell culture substrata. Soft non-viscous PDMS (<18 kPa) is produced using a modified extended crosslinker. MAEs are generated by embedding magnetic microparticles into a soft PDMS matrix. Both substrata yield an elasticity-dependent (14 vs. 100 kPa) modulation of α-smooth muscle actin expression in primary human fibroblasts. To allow for static or dynamic control of MAE material properties, we devise low magnetic field (≈40 mT) stimulation systems compatible with cell-culture environments. Magnetic field-instigated stiffening (14 to 200 kPa) of soft MAE enhances the spreading of primary human fibroblasts and decreases PAX-7 transcription in human mesenchymal stem cells. Pulsatile MAE movements are generated using oscillating magnetic fields and are well tolerated by adherent human fibroblasts. This MAE system provides spatial and temporal control of substratum material characteristics and permits novel designs when used as dynamic cell culture substrata or cell culture-coated actuator in tissue engineering applications or biomedical devices.}, language = {en} } @article{ForsterMayerRabindranathetal., author = {Forster, Eva and Mayer, Matthias and Rabindranath, Raman and B{\"o}se, Holger and Schlunck, G{\"u}nther and Monkman, Gareth J. and Shamonin (Chamonine), Mikhail}, title = {Patterning of ultrasoft, agglutinative magnetorheological elastomers}, series = {Journal of applied polymer science}, volume = {128}, journal = {Journal of applied polymer science}, number = {4}, publisher = {Wiley}, address = {New York, NY}, doi = {10.1002/app.38500}, pages = {2508 -- 2515}, abstract = {A low-cost wax-cast molding technique for structuring ultrasoft (Young's modulus ≤ 40 kPa), agglutinative magnetorheological elastomer (MRE) material is presented. MRE structures ranging from a few millimeters down to the micrometer range with highly reproducible results are possible. Semitransparent MREs are also fabricated and their surfaces modified accordingly. This method opens new possibilities for MREs in biomedical engineering and microfluidic applications. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013}, language = {en} } @article{KleinFreimuthMonkmanetal., author = {Klein, Dagmar and Freimuth, Herbert and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Meier, Alexander and B{\"o}se, Holger and Baumann, Michael and Ermert, Helmut and Bruhns, Otto T.}, title = {Electrorheological Tactile Elements}, series = {Mechatronics}, volume = {15}, journal = {Mechatronics}, number = {7}, publisher = {Pergamon}, address = {Oxford}, doi = {10.1016/j.mechatronics.2004.05.007}, pages = {883 -- 897}, abstract = {The use of ultrasound systems for medical examination and diagnosis is nothing new. The extension of ultrasound techniques for real time elastographic analysis purposes represents a more recent development. Nevertheless, as they stand all such techniques rely on the interpretation of two-dimensional visual data displayed on a video screen. In reality however, a medical doctor will make as much use of exploratory touch as he or she does vision, making the simultaneous portrayal of both video and tactile information most desirable [B{\"o}se H, Monkman GJ, Freimuth H, Ermert H. Haptisches Sensor-Aktor-System uaf der grundlage der Echtzeitelastographie sowie von elktro- und magnetorheologischen Materialien "HASASEM" [3]. BMBF Antrag 01 IR A14D, Oktober 2000]. This paper discusses the preliminary tests and basic design parameters for single tactels using electrorheological fluids. The final aim is to produce a prototype three-dimensional tactile display comprising electrically switchable micro-machined cells whose mechanical moduli are governed by phase changes experienced by electrorheological fluids. This will be integrated with the latest elastographic ultrasonic sensor systems in order to present the human fingers with controllable surfaces capable of emulating biological tissue, muscle and bone.}, language = {en} } @article{KleinRensinkFreimuthetal., author = {Klein, Dagmar and Rensink, D. and Freimuth, Herbert and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and B{\"o}se, Holger and Baumann, Michael}, title = {Modelling the Response of a Tactile Array using an Electrorheological Fluids}, series = {Journal of Physics D: Applied Physics}, volume = {37}, journal = {Journal of Physics D: Applied Physics}, number = {5}, publisher = {IOP Publ.}, address = {Bristol}, issn = {1361-6463}, doi = {10.1088/0022-3727/37/5/023}, pages = {794 -- 803}, abstract = {This paper reports the first step in the development of a tactile array suitable for the presentation of haptic information in virtual reality. The system is based on the electric field dependence of the viscosity of electrorheological fluids. The simulation, as well as the experimental realization of single tactels is described. The mathematical approach is based on the Eckart model (Eckart W 2000 Continuum Mech. Thermodyn. 12 341-62) and its validity is demonstrated by comparing the resulting yield stress with the experimental results from Wunderlich (2000 Dissertation Universit{\"a}t Erlangen-N{\"u}rnberg). Two different tactel designs are realized and the experimental results are compared with numerical simulation. The design of modification B is shown to be applicable for the realization of an actuator array with high spatial resolution.}, language = {en} } @inproceedings{ZappaMonkmanEgersdoerferetal., author = {Zappa, O. and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Datzer, G. and Kahled, W. and B{\"o}se, Holger and Tunayar, A.}, title = {High Voltage Switching using Bulk GaAs}, series = {Actuator 2004 : 9th International Conference on New Actuators \& 3rd International Exhibition on Smart Actuators and Drive Systems, 14-16 June 2004, Bremen, Germany}, booktitle = {Actuator 2004 : 9th International Conference on New Actuators \& 3rd International Exhibition on Smart Actuators and Drive Systems, 14-16 June 2004, Bremen, Germany}, publisher = {HVG Hanseatische Veranstaltungs-GmbH}, address = {Bremen}, language = {en} } @inproceedings{EgersdoerferSchummKessleretal., author = {Egersd{\"o}rfer, Stefan and Schumm, M. and Kessler, C. and Monkman, Gareth J. and B{\"o}se, Holger}, title = {Smart Fluids f{\"u}r die Schnittstelle Mensch-Maschine der Zukunft}, series = {International Mechatronik Forum, Linz}, booktitle = {International Mechatronik Forum, Linz}, pages = {421 -- 428}, language = {de} } @inproceedings{LegrandBoeseErmertetal., author = {Legrand, Virginie and B{\"o}se, Holger and Ermert, Helmut and Freimuth, Herbert and Baumann, Michael and Egersd{\"o}rfer, Stefan and Meier, Alexander and Dragoi, Daniel}, title = {Technologien f{\"u}r haptische Systeme in der Informations{\"u}bertragung}, series = {IAFW Tagung - Lengenfeld, Mai 2003}, booktitle = {IAFW Tagung - Lengenfeld, Mai 2003}, language = {de} } @inproceedings{ForsterMayerRabindranathetal., author = {Forster, Eva and Mayer, Matthias and Rabindranath, Raman and Bentz, Alexander and B{\"o}se, Holger and Shamonin (Chamonine), Mikhail and Monkman, Gareth J.}, title = {Surface Control Magneto-Active Polymers (MAP)}, series = {EuroEAP 2011, First international conference on Electromechanically Active Polymer (EAP) transducers \& artificial muscles, Pisa, 8-9 June}, booktitle = {EuroEAP 2011, First international conference on Electromechanically Active Polymer (EAP) transducers \& artificial muscles, Pisa, 8-9 June}, abstract = {Smart materials change their properties with external energy supply. Besides the known ferro-fluids and Magneto Rheological Fluid (MRF) also the Electro Active Polymer (EAP) and Magneto Rheological Elastomer (MRE) belong to these intelligent materials. The latest generation of magnetic elastomers represents a new class of composite materials. This consists of small magnetized particles which are sized in the micron or even nanometer range that in turn is bounded in a highly elastic rubber matrix. These materials are very often called MRE. Only recently, it has managed to develop these materials even further, so that very soft composite materials with a young?s modulus up to 10 kPa are possible. These soft polymers could be named magneto-active polymers. The combination of polymers with magnetic materials show novel and often enhanced properties. A precisely controllable young?s modulus and hardness, giant and non-homogeneous deformation behavior and rapid response to the magnetic field opens up new possibilities for various applications. Since MAP represent a very new technology, the behavior of these materials as a function of their composition and external conditions so far are not yet sufficiently understood. Therefore, some fundamental studies are necessary. In this paper, the mechanical surface properties are studied using a micro hardness meter. This work shows the possibility to control mechanical properties at the surface of MAP with new developed magnetic systems.}, language = {en} } @inproceedings{MayerForsterRabindranathetal., author = {Mayer, Matthias and Forster, Eva and Rabindranath, Raman and Bentz, Alexander and B{\"o}se, Holger and Shamonin (Chamonine), Mikhail and Monkman, Gareth J.}, title = {Highly compliant Magneto-Active Polymers (MAPs)}, series = {Actuator'11, Bremen, May 2011}, booktitle = {Actuator'11, Bremen, May 2011}, language = {en} } @inproceedings{ForsterRabindranathMayeretal., author = {Forster, Eva and Rabindranath, Raman and Mayer, Matthias and Bentz, Alexander and B{\"o}se, Holger and Shamonin (Chamonine), Mikhail and Monkman, Gareth J.}, title = {Characterization of ultra soft Magneto-Active Polymers (MAPs)}, series = {Conference proceedings / INDUCTICA 2011, Berlin, Germany, 24 - 26 May}, booktitle = {Conference proceedings / INDUCTICA 2011, Berlin, Germany, 24 - 26 May}, language = {en} } @techreport{RabindranathBoeseProbstetal., author = {Rabindranath, Raman and B{\"o}se, Holger and Probst, J{\"o}rn and Schlunck, G{\"u}nther and Mayer, Matthias and Forster, Eva and Bentz, Alexander and Shamonin (Chamonine), Mikhail and Monkman, Gareth J.}, title = {EAP mit magnetisch steuerbarer Elastizit{\"a}t zur Interaktion mit Bindegewebszellen MagElan}, address = {Regensburg}, organization = {Hochschule f{\"u}r Angewandte Wissenschaften Regensburg / Fachbereich Elektro- und Informationstechnik}, pages = {37}, language = {de} }