@inproceedings{EgersdoerferZeidlerWieseretal., author = {Egersd{\"o}rfer, Stefan and Zeidler, A. and Wieser, A. and Trompier, F. and Monkman, Gareth J. and Shamonin (Chamonine), Mikhail}, title = {A portable accident dosimeter using tooth enamel}, series = {Proceedings of the 7th International Symposium on EPR Dosimetry and Applications and the 2nd International Conference on Biodosimetry held at the Uniformed Services University of the Health Sciences, Bethesda, MD, USA, 10-13 July 2006}, booktitle = {Proceedings of the 7th International Symposium on EPR Dosimetry and Applications and the 2nd International Conference on Biodosimetry held at the Uniformed Services University of the Health Sciences, Bethesda, MD, USA, 10-13 July 2006}, publisher = {Pergamon}, address = {Oxford}, language = {en} } @book{MonkmanHesseSteinmannetal., author = {Monkman, Gareth J. and Hesse, Stefan and Steinmann, Ralf and Schunk, Henrik}, title = {Robot Grippers}, publisher = {Wiley}, isbn = {9783527406197}, doi = {10.1002/9783527610280}, abstract = {Since robotic prehension is widely used in all sectors of manufacturing industry, this book fills the need for a comprehensive, up-to-date treatment of the topic. As such, this is the first text to address both developers and users, dealing as it does with the function, design and use of industrial robot grippers. The book includes both traditional methods and many more recent developments such as micro grippers for the optolectronics industry. Written by authors from academia, industry and consulting, it begins by covering the four basic categories of robotic prehension before expanding into sections dealing with endeffector design and control, robotic manipulation and kinematics. Later chapters go on to describe how these various gripping techniques can be used for a common industrial aim, with details of related topics such as: kinematics, part separation, sensors, tool excahnge and compliance. The whole is rounded off with specific examples and case studies. With more than 570 figures, this practical book is all set to become the standard for advanced students, researchers and manufacturing engineers, as well as designers and project managers seeking practical descriptions of robot endeffectors and their applications.}, language = {en} } @article{SorokinStepanovShamoninChamonineetal., author = {Sorokin, Vladislav V. and Stepanov, Gennady V. and Shamonin (Chamonine), Mikhail and Monkman, Gareth J. and Kramarenko, Elena Yu}, title = {Magnetorheological behavior of magnetoactive elastomers filled with bimodal iron and magnetite particles}, series = {Smart materials and structures}, volume = {26}, journal = {Smart materials and structures}, number = {3}, publisher = {IOP Publishing}, doi = {10.1088/1361-665X/26/3/035019}, abstract = {Magnetoactive elastomers (MAE) based on soft silicone matrices, filled with various proportions of large diameter ( approximately 50 mu m) iron and small diameter ( approximately 0.5 mu m) magnetite particles are synthesized. Their rheological behavior in homogeneous magnetic fields up to 600 mT is studied in detail. The addition of small magnetite particles facilitates fabrication of uniformly distributed magnetic elastomer composites by preventing aggregation and sedimentation of large particles during curing. It is shown that using the proposed bimodal filler particles it is possible to tailor various magnetorheological (MR) properties which can be useful for different target applications. In particular, either absolute or relative magnetorheological effects can be tuned. The value of the damping factor as well as the range of deformation amplitudes for the linear viscoelastic regime can be chosen. The interdependencies between different MR properties of bimodal MAEs are considered. The results are discussed in the model framework of particle network formation under the simultaneous influence of external magnetic fields and mechanical deformation.}, language = {en} } @article{SindersbergerDiermeierPremetal., author = {Sindersberger, Dirk and Diermeier, Andreas and Prem, Nina and Monkman, Gareth J.}, title = {Printing of hybrid magneto active polymers with 6 degrees of freedom}, series = {Materials today communications}, volume = {15}, journal = {Materials today communications}, number = {June}, publisher = {Elsevier}, doi = {10.1016/j.mtcomm.2018.02.032}, pages = {269 -- 274}, abstract = {3D printing techniques offer a versatile method for the fabrication and structuring of magnetoactive polymer (MAP) components and devices for research prototype development. MAP materials enjoy an advantage in that the particulate content may be manipulated by external magnetic fields during the forming and curing processes. Controlled particle diffusion within the polymer matrix, by means of external fields applied during the printing process, influences a further three spatial dimensions. This permits control of the spatial particle concentration and makes free displacement of particle accumulations possible during the crosslinking phase. Particles which are susceptible to electric or magnetic fields can thereby be shifted into regions previously free of particles. The additional 3 graded dispersion axes effectively results in what can be described as 6 degrees of freedom (6DOF) printing. Electrically conductive polymers combined with non-conductive areas, provide an additional benefit for the production of complex hybrid structures. This may be augmented by the combination of magnetically active thermoplastics as inelastic structural components together with mechanically deformable elastomers. The combination of all fabrication methods in one hybrid printing process makes the production of complex sensor and actuator systems in one manufacturing sequence possible. This far exceeds the capabilities of conventional casting and machining operations and opens new possibilities for the fabrication of soft material elements.}, language = {en} } @article{StollMayerMonkmanetal., author = {Stoll, Andrea and Mayer, Matthias and Monkman, Gareth J. and Shamonin (Chamonine), Mikhail}, title = {Evaluation of highly compliant magneto-active elastomers with colossal magnetorheological response}, series = {Journal of applied polymer science}, journal = {Journal of applied polymer science}, publisher = {Wiley}, address = {New York, NY}, issn = {1097-4628}, doi = {10.1002/app.39793}, abstract = {Highly compliant elastomers with a shear storage modulus as low as 25 Pa are prepared using commercially available silicone, plasticizer, and tactile mutator silicone additive. They are used as matrix material for magneto-active elastomers (MAEs) with carbonyl iron contents between 0 and 85 wt \%. In the absence of an external magnetic field, the storage modulus of MAEs based on two selected mixtures ranges between ~100 Pa and ~2000 Pa. Addition of a mutator to the matrix mixture results in a long post-cure period depending on the curing temperature and the initial mixture. In the presence of a magnetic field, the presented MAEs exhibit a strong magneto-induced change in storage modulus resulting in a colossal magnetorheological effect of >106 \% which is ~30 times higher than previously reported values. The results are of interest in applications using such elastomers as cell substrates with magnetically tunable rigidity.}, language = {en} } @article{FuechtmeierEgersdoerferMaietal., author = {F{\"u}chtmeier, Bernd and Egersdoerfer, Stefan and Mai, Ronny and Hente, Rainer and Dragoi, Daniel and Monkman, Gareth J. and Nerlich, Michael}, title = {Reduction of femoral shaft fractures in vitro by a new developed reduction robot system "RepoRobo"}, series = {Injury}, volume = {35}, journal = {Injury}, number = {1, Supplement}, publisher = {Elsevier}, organization = {Elsevier}, issn = {1879-0267}, doi = {10.1016/j.injury.2004.05.019}, pages = {113 -- 119}, abstract = {Closed reduction of the long bones is associated with the use of considerable force. This force must be maintained for the reduction maneuver and fixation process. At present, apart from the extension table or the large AO distractor, only rather inadequate reduction aids are available. A solution to this problem is being sought in the form of a robotic system with which precision can be improved and the holding effort reduced. In the research project presented here, a synthetic femur with integrated tensioned mainspring and a 32-A3 type fracture served as a bone reduction model. The fracture was stabilized with a standard AO fixator. A St{\"a}ubli robot (model RX130) was converted by appropriate modification so that it could be used for the reduction of femoral shaft fractures in vitro. The robot was equipped with a pneumatic 2-fingered gripper, on which the fingers have been modified so that they can grip the AO fixator clamp. A Force-Feedback-Sensor was inserted between the gripper and the robot to obtain online recordings of the forces and moments in all three axes. With this setup it is possible to achieve precise reduction of the fracture in all planes under visual control.}, language = {en} } @article{Monkman, author = {Monkman, Gareth J.}, title = {Advances in Shape Memory Polymer Actuation}, series = {Mechatronics}, volume = {10}, journal = {Mechatronics}, number = {4/5}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-4006}, doi = {10.1016/S0957-4158(99)00068-9}, pages = {489 -- 498}, abstract = {Shape memory materials fulfill an important role in both actuation and mechanical coupling between actuators and associated dynamic systems. The simplest techniques are thermally based and in addition to the more common shape memory alloys there are also shape memory polymers. These have similar characteristics to those of their metallic cousins, but there the relationship stops. The basic physical principles are very different and this paper attempts to outline the current state-of-the-art to those already involved with the technology and perhaps open a fresh chapter in smart materials to those who are new to it.}, language = {en} } @article{Monkman, author = {Monkman, Gareth J.}, title = {Precise Piezoelectric Prehension}, series = {Industrial Robot}, volume = {27}, journal = {Industrial Robot}, number = {3}, publisher = {MCB University Press}, issn = {0143-991x}, doi = {10.1108/01439910010371605}, pages = {189 -- 194}, abstract = {Piezoelectric actuators are well established for use in expensive optical equipment. Within the last decade, relatively inexpensive piezoelectric actuators have become established technology in pneumatic switching and the first piezoelectrically driven impactive robot grippers are just starting to emerge. Although this article concentrates largely on the use of piezoelectric actuators for use in robot gripping systems, the potential for applications outside this field is immense.}, language = {en} } @article{Monkman, author = {Monkman, Gareth J.}, title = {Workpiece Retention during Machine Processing}, series = {Assembly Automation}, volume = {21}, journal = {Assembly Automation}, number = {1}, publisher = {Emerald}, address = {Bringley}, issn = {1758-4078}, doi = {10.1108/01445150110381754}, pages = {61 -- 67}, abstract = {Discusses the failings of conventional fixturing systems such as jigs and clamps and describes how electrorheological fluids can be used for flexible fixturing and workpiece retention.}, language = {en} } @article{Monkman, author = {Monkman, Gareth J.}, title = {Special Issue on Miniature Actuators}, series = {Mechatronics}, volume = {10}, journal = {Mechatronics}, number = {4/5}, publisher = {Elsevier}, doi = {10.1016/S0957-4158(99)00061-6}, pages = {429 -- 430}, language = {en} } @inproceedings{Monkman, author = {Monkman, Gareth J.}, title = {Auswirkungen der Mechatronik auf die Entwicklungsmethodik}, series = {Mechatronik Forum, OTTI, Handelskammer Regensburg, 25.-26. Oktober 2000}, booktitle = {Mechatronik Forum, OTTI, Handelskammer Regensburg, 25.-26. Oktober 2000}, language = {de} } @inproceedings{KreitmeierSchulzMonkmanetal., author = {Kreitmeier, Florian and Schulz, Irene and Monkman, Gareth J. and Shamonin (Chamonine), Mikhail and Fetisov, Yuri K. and Chashin, Dmitri V. and Fetisov, Leonid Y.}, title = {Observation of Nonlinear Magnetoelectric Response to Magnetic Pulses in Layered Magnetostrictive-Piezoelectric Structures}, publisher = {IEEE}, doi = {10.1109/ISAF.2012.6297739}, abstract = {A detailed experimental study of the magnetoelectric response of planar bi- and symmetric trilayer composite structures to magnetic field pulses is reported. The structures consist of layers of commercially available piezoelectric (lead zirconate titanate) and magnetostrictive (permendur or nickel) materials. The magnetic-field pulses have the form of a half-wave sine function with duration of 450 μs and amplitude from 500 Oe up to 38 kOe. The measurement method is explained and the measured time dependence of the resulting voltage is presented. The most interesting case, when pulse amplitudes are sufficiently large (~ 1-10 kOe) and various types of acoustic oscillation with frequencies much larger than the reciprocal pulse length are excited in the structures, is considered. The dependencies of the magnetoelectric voltage coefficient on the excitation frequency and the applied magnetic field are calculated. By digital signal processing the results are compared with those obtained by the method of harmonic field modulation (HFM). The findings are of interest for developing magnetoelectric sensors for pulsed magnetic fields as well as for rapid characterization of magnetoelectric composite structures.}, language = {en} } @article{HirmerDanilovGiglbergeretal., author = {Hirmer, Marion and Danilov, Sergey N. and Giglberger, Stephan and Putzger, J{\"u}rgen and Niklas, Andreas and J{\"a}ger, Andreas and Hiller, Karl-Anton and Schmalz, Gottfried and Redlich, Britta and Schulz, Irene and Monkman, Gareth J. and Ganichev, Sergey D.}, title = {Spectroscopic Study of Human Teeth and Blood from Visible to Terahertz Frequencies for Clinical Diagnosis of Dental Pulp Vitality}, series = {Journal of Infrared, Millimeter, and Terahertz Waves}, volume = {33}, journal = {Journal of Infrared, Millimeter, and Terahertz Waves}, publisher = {Springer}, issn = {1866-6906}, doi = {10.1007/s10762-012-9872-3}, pages = {366 -- 375}, abstract = {Transmission spectra of wet human teeth and dentin slices, together with blood of different flow rates were investigated. The measurements carried out over a wide spectral range, from visible light down to terahertz radiation. The results make it possible to find the optimum light frequency for an all-optical determination of pulpal blood flow and, consequently, for clinically diagnosis of tooth vitality.}, language = {en} } @inproceedings{SchulzPutzgerNiklasetal., author = {Schulz, Irene and Putzger, J{\"u}rgen and Niklas, Andreas and Brandt, M. and J{\"a}ger, Andreas and Hardt, A. and Kn{\"o}rzer, S. and Hiller, Karl-Anton and L{\"o}ffler, S. and Schmalz, Gottfried and Danilov, Sergey N. and Giglberger, Stephan and Hirmer, Marion and Ganichev, Sergey D. and Monkman, Gareth J.}, title = {PPG signal acquisition and analysis on in vitro tooth model for dental pulp vitality assessmen}, series = {2nd Applied Research Conference 2012 (ARC 2012), 25./26. June 2012, Nuremberg}, booktitle = {2nd Applied Research Conference 2012 (ARC 2012), 25./26. June 2012, Nuremberg}, publisher = {Shaker-Verlag}, address = {Aachen}, organization = {ARC}, pages = {142 -- 146}, 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{Monkman, author = {Monkman, Gareth J.}, title = {Sensors and Actuators in Automation}, series = {Ostbayerisches Fachforum f{\"u}r Mechatronik, Roding, 16. M{\"a}rz 2001}, booktitle = {Ostbayerisches Fachforum f{\"u}r Mechatronik, Roding, 16. M{\"a}rz 2001}, language = {en} } @article{Monkman, author = {Monkman, Gareth J.}, title = {Electroadhesive Microgrippers}, series = {Assembly Automation}, volume = {24}, journal = {Assembly Automation}, number = {1}, publisher = {MCB University Press}, pages = {326 -- 330}, language = {en} } @article{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Optimisation of Prehension Force through Tactile Sensing}, series = {Industrial Robot}, volume = {35}, journal = {Industrial Robot}, number = {4}, publisher = {MCB Univ. Press}, address = {Bradford}, doi = {10.1108/01439910810876454}, pages = {361 -- 368}, abstract = {Purpose The purpose of this paper is to analyze surface deformations caused by shear and moment forces on tactile materials and present a method to detect and reduce the risk of slippage by controlling the normal force as measured by tactile sensor arrays. Design/methodology/approach A predictive model has been proposed which uses a basic method adapted to real applications in grasp optimization. Prevention of premature release with minimum prehension force is addressed without the need to measure the coefficient of friction between object and robot gripper. Predictive models have been used to develop a set of rules which predict the pre-slip based on fluctuations in tactile signal data. Findings The tactile sensors can be used in a "nonlinear" manner during manipulation tasks. When the gripper finger first makes contact with an object, the stress distribution under the finger skin varies rapidly. Predictive models have been used to develop a set of rules which predict the pre-slip based on fluctuations in tactile signal data. Pre-slip at the contact area just prior to object movement produces rapid but detectable stress transients. Originality/value Tactile sensors do not measure stress generated by a contact with an object directly, but instead measure strain in an interposed compliant, polymeric medium intended for sensor protection and prehension assistance. Reliable detection of pre-slip has hitherto eluded researchers using such tactile techniques.}, language = {en} } @incollection{PetcharteeMonkmanSuebsromran, author = {Petchartee, Somrak and Monkman, Gareth J. and Suebsromran, Anan}, title = {3D-Shape Recognition based Tactile Sensor}, series = {Smart Sensors and Sensing Technology}, booktitle = {Smart Sensors and Sensing Technology}, editor = {Mukhopadhyay, S.C. and Gupta, G.S.}, publisher = {Springer}, address = {Berlin ; Heidelberg}, isbn = {978-3-540-79589-6}, doi = {10.1007/978-3-540-79590-2_21}, pages = {317 -- 332}, abstract = {A surface recognition algorithm capable of determining contact surfaces types by means of tactile sensor fusion is proposed. The authors present a recognition processes for 3-dimensional deformations in a 2-dimensional parametric domain. Tactile information is extracted by physical contact with a grasped object through a sensing medium. Information is obtained directly at the interface between the object and the sensing device and relates to three-dimensional position and orientation of the object in the presence of noise. The technique called "eigenvalue trajectory analysis", is introduced and adopted for specifying the margin of classification and classification thresholds. The authors demonstrate mathematically that this approach, which complements existing work, offers significant computational advantages when applied to challenging contact scenarios such as dynamic recognition of contact deformations.}, language = {en} } @inproceedings{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {3D-Shape Recognition based Tactile Sensor}, series = {ICST 2007, Proceedings of 2nd International Conference on Sensing Technology : Massey University, Palmerston North, New Zealand, November 26 - 28, 2007}, booktitle = {ICST 2007, Proceedings of 2nd International Conference on Sensing Technology : Massey University, Palmerston North, New Zealand, November 26 - 28, 2007}, publisher = {Inst. of Information Sciences and Techn., Massey Univ.}, address = {Palmerston}, pages = {56 -- 61}, language = {en} } @article{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Pre-slip Sensing through Tactile Sensing}, series = {Sensors \& Transducers}, volume = {90}, journal = {Sensors \& Transducers}, number = {4, Special Issue}, publisher = {International Frequency Sensor Association (IFSA)}, issn = {1726-5479}, pages = {310 -- 324}, language = {en} } @inproceedings{SchummSchwarzWahleretal., author = {Schumm, M. and Schwarz, E. and Wahler, D. and Jayaprakash, S. N. and Monkman, Gareth J.}, title = {The Trilopede}, series = {Informatics Microsystems Information Systems Preceedings}, volume = {1}, booktitle = {Informatics Microsystems Information Systems Preceedings}, number = {1}, publisher = {Moscow State Technical University}, language = {en} } @inproceedings{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Contact Identification using Tactile Arrays}, series = {Proceedings of the 7th IEEE International Symposium on Signal Processing and Information Technology (ISSPIT 2007), 15.-18.12.2007, Giza, Egypt}, booktitle = {Proceedings of the 7th IEEE International Symposium on Signal Processing and Information Technology (ISSPIT 2007), 15.-18.12.2007, Giza, Egypt}, publisher = {IEEE}, doi = {10.1109/ISSPIT.2007.4458144}, pages = {1121 -- 1126}, abstract = {The proposed method allows a robot to quantify tactile recognition of grasped objects. The responses by the robot are matched by randomly introducing objects following the completion of tactile sensor based training phases on 4 specific objects. The reproduction of the robotic contact identification is accomplished by matching threshold values of the smallest eigenvalue of the Quadric surface - called the eigenvalue trajectory. Once the grasped objects are introduced to the 2-fingered robot hand, the eigenvalue trajectory of contact surfaces are calculated by the system. Calculations are based on the degree of similarity of the characteristics between the newly received and previously trained tactile data. Experimental results indicate that the proposed algorithm allows a successful quantification of robotic contact recognition and the accomplishment of high levels of accuracy in contact identification. These results confirm that the proposed method is useful for identifying contact surfaces based on tactile sensor data.}, language = {en} } @inproceedings{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Contact Classification using Tactile Arrays}, series = {2007 3rd International Conference on Intelligent Sensors, Sensor Networks and Information (ISSNIP), 3, 03.-06.12.2007, Melbourne, VIC, Australia}, booktitle = {2007 3rd International Conference on Intelligent Sensors, Sensor Networks and Information (ISSNIP), 3, 03.-06.12.2007, Melbourne, VIC, Australia}, doi = {10.1109/ISSNIP.2007.4496848}, pages = {227 -- 232}, abstract = {This paper proposed a contact recognition algorithm capable of determining contact surfaces types by tactile sensor fusion. This algorithm can recognize grasped objects using a 2- fingered robot hand, on which tactile sensors are mounted. Experiments have demonstrated reliable surface classification and accurate transformation independent of object shape and orientation. The contribution of this paper regards the relations between a surface and the points cloud defining it. Particularly, we investigate on the possibility that there is some intrinsic feature of a points cloud under quadric surface, allowing us to discriminate or classify a dataset defining a surface from the acquisition noise.}, language = {en} } @article{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Contact Recognition using Tactile Sensor}, series = {Annals Universitaria Craiova-Series: Automation, Computers, Electronics and Mechatronics}, volume = {4 (31)}, journal = {Annals Universitaria Craiova-Series: Automation, Computers, Electronics and Mechatronics}, number = {2}, pages = {103 -- 108}, abstract = {The surface recognition algorithm that determines the types of contact surfacesby fusing information collected by the tactile sensor system is proposed. The tactilesystem will be determined from the shape of the object image which can then becharacterized using the mathematical properties of Quadric surface. This algorithm canrecognize 3-D objects using a 2-fingered robot gripper, on which tactile sensors aremounted. Experiments have demonstrated the reliability of the surface classificationmethod and the accuracy of transformations independent of an object's shape, translationand rotation.}, language = {en} } @article{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Optimisation of Prehension Force through Tactile Sensing}, series = {Journal of Advanced Manufacturing Technology}, journal = {Journal of Advanced Manufacturing Technology}, publisher = {Universiti Teknikal Malaysia Melaka}, issn = {2289-8107}, language = {en} } @article{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Contact Recognition through Tactile Sensing}, series = {ACTA Universitatis Apulensis; Seria Mathematics-Informatics}, journal = {ACTA Universitatis Apulensis; Seria Mathematics-Informatics}, publisher = {Department of Mathematics and Informatics}, address = {Alba Iulia}, issn = {1582-5329}, language = {en} } @inproceedings{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Contact Recognition using Tactile Sensor}, series = {Proc. International Symposium on System Theory, Automation, Robotics, Computers, Informatics, Electronics and Instrumentation (SINTES13), Romania}, booktitle = {Proc. International Symposium on System Theory, Automation, Robotics, Computers, Informatics, Electronics and Instrumentation (SINTES13), Romania}, pages = {285 -- 290}, language = {en} } @inproceedings{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Pre-slip detection based Tactile Sensing}, series = {Proc. 3rd International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP 2007), Melbourne}, booktitle = {Proc. 3rd International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP 2007), Melbourne}, pages = {233 -- 238}, language = {en} } @inproceedings{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Contact classification using tactile arrays}, series = {Proc. International Conference on Engineering \& ICT 2007 (ICEI 2007), 27th to 29th November 2007, Malacca, Malaysia}, booktitle = {Proc. International Conference on Engineering \& ICT 2007 (ICEI 2007), 27th to 29th November 2007, Malacca, Malaysia}, language = {en} } @inproceedings{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Optimisation of Prehension Force through Tactile Sensing}, series = {Proc. International Conference on Engineering \& ICT 2007 (ICEI 2007), Malaysia}, booktitle = {Proc. International Conference on Engineering \& ICT 2007 (ICEI 2007), Malaysia}, language = {en} } @article{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Slip Prediction through Tactile Sensing}, series = {Sensors \& Transducers}, volume = {90}, journal = {Sensors \& Transducers}, number = {Special Issue April 2008}, publisher = {International Frequency Sensor Association, IFSA}, issn = {1726-5479}, pages = {310 -- 324}, abstract = {This paper introduces a new way to predict contact slip using a resistive tactile sensor. The prototype sensor can be used to provide intrinsic information relating to geometrical features situated on the surface of grasped objects. Information along the gripper finger surface is obtained with a measurement resolution dependant on the number of discrete tactile elements. The tactile sensor predicts the partial slip of a tactile surface by sensing micro vibrations in tangential forces which are caused by an expansion of the slip regions within the contact area. The location of the local slip is not specified but its occurrence can be predicted immediately following micro vibration detection. Predictive models have been used to develop a set of rules which predict the slip based on fluctuations in tactile signal data.  }, 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{HecknerStrakaSchubertetal., author = {Heckner, T. and Straka, M. and Schubert, A. and Petchartee, Somrak and Monkman, Gareth J.}, title = {Entwicklung eines Navigationssystems f{\"u}r autonome mobile Robotersysteme}, series = {International Mechatronik Forum, Linz}, booktitle = {International Mechatronik Forum, Linz}, pages = {520 -- 527}, language = {de} } @misc{HesseMonkmanSteinmannetal., author = {Hesse, Stefan and Monkman, Gareth J. and Steinmann, Ralf and Schunk, Henrik}, title = {Robotergreifer}, publisher = {Hanser}, address = {M{\"u}nchen ; Wien}, isbn = {978-3-446-22920-4}, pages = {IX, 436 S.}, language = {de} } @inproceedings{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Pre-slip sensing using tactile sensor}, series = {Proceedings / SINTES 13, International Symposium on Systems Theory, Automation, Robotics, Computers, Informatics, Electronics and Instrumentation, October 18 - 20, 2007, Craiova - Romania}, booktitle = {Proceedings / SINTES 13, International Symposium on Systems Theory, Automation, Robotics, Computers, Informatics, Electronics and Instrumentation, October 18 - 20, 2007, Craiova - Romania}, pages = {279 -- 284}, language = {en} } @article{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Pre-slip sensing using tactile sensor}, series = {Annals Universitaria Criaiova-Series: Automation, Computers, Electronics and Mechatronics}, volume = {4 (31)}, journal = {Annals Universitaria Criaiova-Series: Automation, Computers, Electronics and Mechatronics}, number = {2}, pages = {109 -- 114}, language = {en} } @inproceedings{PetcharteeMonkman, author = {Petchartee, Somrak and Monkman, Gareth J.}, title = {Pre-slip Sensing through Tactile Sensing}, series = {Proc. 2nd International Conference on Sensing Technology (ICST 2007), New Zealand}, booktitle = {Proc. 2nd International Conference on Sensing Technology (ICST 2007), New Zealand}, pages = {62 -- 67}, language = {en} } @article{PremChavezVegaBoehmetal., author = {Prem, Nina and Chavez Vega, Jhohan Harvey and B{\"o}hm, Valter and Sindersberger, Dirk and Monkman, Gareth J. and Zimmermann, Klaus}, title = {Properties of Polydimethylsiloxane and Magnetoactive Polymers with Electroconductive Particles}, series = {Macromolecular Chemistry and Physics}, volume = {219}, journal = {Macromolecular Chemistry and Physics}, number = {18}, publisher = {Wiley}, doi = {10.1002/macp.201800222}, abstract = {Magnetoactive polymers are intelligent materials whose mechanical and electrical characteristics are reversibly influenced by external magnetic stimuli. They consist of a highly elastic polymer matrix in which magnetically soft and/or hard particles are distributed by means of special fabrication processes. In addition to ferromagnetic particles such as carbonyl iron powder, electrically conductive particles may also be embedded into the polymer matrix. After characterizing a range of compounds, this work focuses on a comparison of the electrical properties and the suitability of various materials for applications, with particular emphasis on integration into 3D and 6D printing processes. 6D printing is based on the selective positioning of particles in a 3D polymer matrix with a further three degrees of freedom for a graduated dispersion of the particles at certain points and in desired directions. The aim is therefore to ensure that the polymers containing electroconductive tracks have the best possible electrical properties, that is, low resistivity but are still capable of being printed. A comparison between the traditionally used compounds containing graphite and carbon black is made for the first time. This latter is found to be greatly superior both in terms of electrical conductivity and applicability to 3D printing and 6D printing.}, language = {en} } @article{BartschBehamGebhardtetal., author = {Bartsch, Alexander and Beham, Daniela and Gebhardt, Jakob and Ehrlich, Ingo and Schratzenstaller, Thomas and Monkman, Gareth J.}, title = {Mechanical Properties of NdPrFeB Based Magnetoactive Bisphenol-Free Boron-Silicate Polymers}, series = {Journal of Nanomedicine and Nanotechnology}, volume = {14}, journal = {Journal of Nanomedicine and Nanotechnology}, number = {6}, publisher = {Walsh Medical Media}, issn = {2157-7439}, doi = {10.35248/2157-7439.23.14.705}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-67425}, abstract = {Following a ban on many materials containing bisphenol-A, new bisphenol-free Boron silicates have been found as substitutes. The purpose of this study is to describe the mechanical properties of these bisphenol-free magnetoactive borosilicate polymers containing hard magnetic particles. Samples of 0\%, 33\% and 66\% by wt. were loaded for compression using a universal testing machine. The maximum forces occurring for different travel speeds were compared before and after post-magnetization treatments. The post-magnetization included 2 stages. In addition, the change in mechanical properties within 24 hours after the post-magnetization process was investigated. Furthermore, the influence of speed and particle content were investigated. In general, there is a correlation between the required compressive force and, the level of post-magnetization stress, the increase in travel speed and particle content in the boron silicate. Comparison of the non-post-magnetized and post-magnetized samples using two-tailed t-tests shows that the p-values for all weight fraction changes in NdPrFeB particles and travel speeds are less than 0.001. Also, a comparison between tests in which the traverse speed was varied also showed significant changes in the resulting compression forces. The same is valid for changes in the weight ratio of the NdPrFeB particles in the samples. For post-magnetized samples, no significant difference can be observed in the first 24 hours following magnetization. In summary, the material presents viscoelastic, plastic force-displacement behavior, which can be well recognized by its bi-linear curve shape. The investigation shows that borosilicate polymers based on NdPrFeB can have their mechanical behavior modified and controlled by post-magnetization processes. This opens new possibilities for many future applications.}, language = {en} } @unpublished{MalzSindersbergerMonkmanetal., author = {Malz, Sebastian and Sindersberger, Dirk and Monkman, Gareth J. and Steffens, Oliver and Kusterle, Wolfgang}, title = {Determination of the Water Content within Tunnel Linings to Assess Fire Safety}, series = {SSRN Electronic Journal}, journal = {SSRN Electronic Journal}, doi = {10.2139/ssrn.4390700}, pages = {22}, abstract = {Fires in tunnels are known to lead to explosive spalling of the tunnel linings, mainly due to rapid expansion of water as a result of vaporization in the concrete. In order to determine water content and assess fire safety within tunnel linings a novel measurement system has been developed. The development process includes the calibration of the sensor system via both direct and indirect approaches. This work compares both calibration methods and shows the differences that can occur due to measurement uncertainty. This work presents the measured water content within the Inntal tunnel, Austria as a representative tunnel from a total of four investigated tunnels. The obtained water content is compared to that found in the literature, and recommendations for practical work in terms of fire safety is given.}, language = {en} } @article{KnoerzerHillerBrandtetal., author = {Kn{\"o}rzer, S. and Hiller, Karl-Anton and Brandt, M. and Niklas, Andreas and Putzger, J{\"u}rgen and Monkman, Gareth J. and Danilov, Sergey N. and Ganichev, Sergey D. and Schulz, Irene and Schmalz, Gottfried}, title = {Detection of pulsed blood flow through a molar pulp chamber and surrounding tissue in vitro}, series = {Journal of Clinical Oral Investigations}, volume = {23}, journal = {Journal of Clinical Oral Investigations}, number = {3}, publisher = {Springer Nature}, doi = {10.1007/s00784-018-2530-y}, pages = {1121 -- 1132}, abstract = {OBJECTIVES Due to severe limitations of dental pulp sensitivity tests, the direct recording of pulsed blood flow, using photoplethysmography (PPG), has been proposed. In vivo evaluation is methodologically difficult and in vitro models have hitherto been adversely influenced by shortcomings in emulating the in vivo situation. Consequently, the aim of this study was to test an improved data acquisition system and to use this configuration for recording pulsed blood in a new model. MATERIALS AND METHODS We introduced a PPG signal detection system by recording signals under different blood flow conditions at two wavelengths (625 and 940 nm). Pulsed blood flow signals were measured using an in vitro model, containing a molar with a glass pulp and a resin socket, which closely resembled in vivo conditions with regard to volumetric blood flow, pulp anatomy, and surrounding tissue. RESULTS The detection system showed improved signal strength without stronger blanketing of noise. On the tooth surface, it was possible to detect signals emanating from pulsed blood flow from the glass pulp and from surrounding tissue at 625 nm. At 940 nm, pulp derived signals were recorded, without interference signals from surrounding tissue. CONCLUSION The PPG-based method has the potential to detect pulsed blood flow in small volumes in the pulp and (at 625 nm) also in adjacent tissues. CLINICAL RELEVANCE The results show the need for clear differentiation of the spatial origins of blood flow signals of any vitality test method to be applied to teeth.}, language = {en} } @article{ZimmermannBoehmBeckerTIetal., author = {Zimmermann, Klaus and B{\"o}hm, Valter and Becker T.I., and Chavez Vega, Jhohan Harvey and Kaufhold, Tobias and Monkman, Gareth J. and Sindersberger, Dirk and Diermeier, Andreas and Prem, Nina}, title = {Mechanical Characterization of the Field-Dependent Properties of Magnetoactive Polymers and Integrated Electrets for their Application in Soft Robotics}, series = {International Scientific Journal "Problems of Mechanics"}, volume = {69}, journal = {International Scientific Journal "Problems of Mechanics"}, number = {4}, issn = {1512-0740}, language = {en} } @misc{LautenschlaegerLeisDendorferetal., author = {Lautenschl{\"a}ger, Toni and Leis, Alexander and Dendorfer, Sebastian and Palm, Christoph and Schreiner, Rupert and Langer, Christoph and Prommesberger, Christian and Ławrowski, Robert Damian and Dams, Florian and Bornmann, Benjamin and Navitski, Aliaksandr and Serbun, Pavel and M{\"u}ller, G{\"u}nter and Liebetruth, Thomas and Kohlert, Dieter and Pernsteiner, Jochen and Schreier, Franz and Heerklotz, Sabrina and Heerklotz, Allwin and Boos, Alexander and Herwald, Dominik and Monkman, Gareth J. and Treiber, Daniel and Mayer, Matthias and H{\"o}rner, Eva and Bentz, Alexander and Shamonin (Chamonine), Mikhail and Johansen, S{\o}ren Peter and Reichel, Marco and Stoll, Andrea and Briem, Ulrich and Dullien, Silvia and Renkawitz, Tobias and Weber, Tim and Dendorfer, Sebastian and Grifka, Joachim and Penzkofer, Rainer and Barnsteiner, K. and Jovanovik, M. and Wernecke, P. and V{\"o}gele, A. and Bachmann, T. and Pl{\"o}tz, Martin and Schliekmann, Claus and Wels, Harald and Helmberger, Paul and Kaspar, Marcel and H{\"o}nicka, M. and Schrammel, Siegfried and Enser, Markus and Schmidmeier, Monika and Schroll-Decker, Irmgard and Haug, Sonja and Gelfert, Verena and Vernim, Matthias}, title = {Forschungsbericht 2012}, editor = {Baier, Wolfgang}, address = {Regensburg}, organization = {Ostbayerische Technische Hochschule Regensburg}, doi = {10.35096/othr/pub-783}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-7834}, pages = {64}, language = {de} } @article{LangMonkman, author = {Lang, Alexander and Monkman, Gareth J.}, title = {An analysis of the electrical capacitance between two conducting spheres}, series = {Journal of Electrostatics}, volume = {108}, journal = {Journal of Electrostatics}, publisher = {Elsevier}, doi = {10.1016/j.elstat.2020.103518}, abstract = {Many modern composites consist of dielectric polymer matrices containing embedded spherical particles. These particles can be electrically conducting and often have magnetic properties. In order to accurately model and simulate such materials, precise calculation of the electrical capacitance between identically sized spheres is required. This is of particular relevance at microscopic dimensions where many smart material-based micro devices are concerned. This may appear trivial for a small number of particles. However, many methods or their analysis appear to be questionable or not applicable at reduced dimensions. In this work, the various methods of analysis are scrutinized before being compared with both simulation and direct measurements. It is surprising to note that of the many works investigated only 3 are in close agreement with both simulation and measurement. Graphical abstract This paper deals with the precise calculation of the electrical capacitance between two conducting spheres of equal, or near equal size.The calculations have been verified by both experimental measurements and simulation. Algorithms in MatLab (Octave) format have been included in the supporting information.}, language = {en} } @inproceedings{MonkmanDragoiEgersdoerferetal., author = {Monkman, Gareth J. and Dragoi, Daniel and Egersd{\"o}rfer, Stefan and F{\"u}chtmeier, Bernd and Nerlich, Michael}, title = {Der Roboter als Hilfsmittel in der Chirurgie // International Mechatronik Forum, Linz, October 2006}, series = {International Mechatronik Forum, Linz}, booktitle = {International Mechatronik Forum, Linz}, language = {de} } @misc{FuechtmeierNerlichMonkmanetal., author = {F{\"u}chtmeier, Bernd and Nerlich, Michael and Monkman, Gareth J. and Egersd{\"o}rfer, Stefan and Raja, Kashif}, title = {Development of a Robotic Navigation and Fracture Fixation System - 7th Intl. Conf. Medical Aspects of Telemedicine, 23 September 2002}, series = {European Journal of Medical Research; Abstracts}, journal = {European Journal of Medical Research; Abstracts}, publisher = {Biomed Central}, address = {London}, issn = {2047-783X}, pages = {28 -- 29}, language = {en} } @misc{FuechtmeierEgersdoerferMonkmanetal., author = {F{\"u}chtmeier, Bernd and Egersd{\"o}rfer, Stefan and Monkman, Gareth J. and Nerlich, Michael}, title = {Entwicklung eines Systems zur navigierten und robotergest{\"u}tzten Frakturfixation}, series = {Zweite Jahrestagung der Deutschen Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie : 4.-7. November 2003, N{\"u}rnberg, Germany; CURAC 2003; Abstract CD-ROM}, journal = {Zweite Jahrestagung der Deutschen Gesellschaft f{\"u}r Computer- und Roboterassistierte Chirurgie : 4.-7. November 2003, N{\"u}rnberg, Germany; CURAC 2003; Abstract CD-ROM}, address = {Erlangen-N{\"u}rnberg}, language = {de} } @inproceedings{MayerMonkman, author = {Mayer, Matthias and Monkman, Gareth J.}, title = {Modern permanent magnetic materials: Advances and limits}, series = {Inductica - Berlin Messe, 22-24 May 2007}, booktitle = {Inductica - Berlin Messe, 22-24 May 2007}, language = {en} } @misc{SorokinStepanovVasilievetal., author = {Sorokin, Vladislav V. and Stepanov, Gennady V. and Vasiliev, V. G. and Kramarenko, Elena Yu and Mayer, Matthias and Shamonin (Chamonine), Mikhail and Monkman, Gareth J.}, title = {Investigation of Dynamic Modulus and Normal Force of Magnetorheological Elastomers with Soft and Hard Magnetic Fillers}, series = {NANO 2014, July 13 - 18, 2014, Moscow ; Section 06 - Polymer, Organic and Other Soft Matter Materials}, journal = {NANO 2014, July 13 - 18, 2014, Moscow ; Section 06 - Polymer, Organic and Other Soft Matter Materials}, address = {Moscow}, language = {en} }