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2012


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Methods, apparatuses, and systems for micromanipulation with adhesive fibrillar structures

Sitti, M., Mengüç, Y.

December 2012, US Patent App. 14/368,079 (misc)

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[BibTex]

2012



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Dry adhesive structures

Sitti, M., Murphy, M., Aksak, B.

December 2012, US Patent App. 13/533,386 (misc)

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[BibTex]

[BibTex]


Quasi-Newton Methods: A New Direction
Quasi-Newton Methods: A New Direction

Hennig, P., Kiefel, M.

In Proceedings of the 29th International Conference on Machine Learning, pages: 25-32, ICML ’12, (Editors: John Langford and Joelle Pineau), Omnipress, New York, NY, USA, ICML, July 2012 (inproceedings)

Abstract
Four decades after their invention, quasi- Newton methods are still state of the art in unconstrained numerical optimization. Although not usually interpreted thus, these are learning algorithms that fit a local quadratic approximation to the objective function. We show that many, including the most popular, quasi-Newton methods can be interpreted as approximations of Bayesian linear regression under varying prior assumptions. This new notion elucidates some shortcomings of classical algorithms, and lights the way to a novel nonparametric quasi-Newton method, which is able to make more efficient use of available information at computational cost similar to its predecessors.

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website+code pdf link (url) [BibTex]

website+code pdf link (url) [BibTex]


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Surgical Instrument Vibrations are a Construct-Valid Measure of Technical Skill in Robotic Peg Transfer and Suturing Tasks

Bark, K., Gomez, E. D., Rivera, C., McMahan, W., Remington, A., Murayama, K., Lee, D. I., Dumon, K., Williams, N., Kuchenbecker, K. J.

In Proc. Hamlyn Symposium on Medical Robotics, pages: 50-51, London, England, July 2012, Oral presentation given by Bark (inproceedings)

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[BibTex]

[BibTex]


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Evaluation of Tactile Feedback Methods for Wrist Rotation Guidance

Stanley, A. A., Kuchenbecker, K. J.

IEEE Transactions on Haptics, 5(3):240-251, July 2012 (article)

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[BibTex]

[BibTex]


Entropy Search for Information-Efficient Global Optimization
Entropy Search for Information-Efficient Global Optimization

Hennig, P., Schuler, C.

Journal of Machine Learning Research, 13, pages: 1809-1837, -, June 2012 (article)

Abstract
Contemporary global optimization algorithms are based on local measures of utility, rather than a probability measure over location and value of the optimum. They thus attempt to collect low function values, not to learn about the optimum. The reason for the absence of probabilistic global optimizers is that the corresponding inference problem is intractable in several ways. This paper develops desiderata for probabilistic optimization algorithms, then presents a concrete algorithm which addresses each of the computational intractabilities with a sequence of approximations and explicitly adresses the decision problem of maximizing information gain from each evaluation.

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PDF Web Project Page [BibTex]

PDF Web Project Page [BibTex]


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Methods of making dry adhesives

Sitti, M., Murphy, M., Aksak, B.

June 2012, US Patent 8,206,631 (misc)

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[BibTex]

[BibTex]


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Spectral Subtraction of Robot Motion Noise for Improved Vibrotactile Event Detection

McMahan, W., Kuchenbecker, K. J.

In Haptics: Perception, Devices, Mobility, and Communication: Proc. EuroHaptics, Part I, 7282, pages: 326-337, Lecture Notes in Computer Science, Springer, Tampere, Finland, June 2012, Oral presentation given by Kuchenbecker (inproceedings)

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[BibTex]

[BibTex]


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Learning Tracking Control with Forward Models

Bócsi, B., Hennig, P., Csató, L., Peters, J.

In pages: 259 -264, IEEE International Conference on Robotics and Automation (ICRA), May 2012 (inproceedings)

Abstract
Performing task-space tracking control on redundant robot manipulators is a difficult problem. When the physical model of the robot is too complex or not available, standard methods fail and machine learning algorithms can have advantages. We propose an adaptive learning algorithm for tracking control of underactuated or non-rigid robots where the physical model of the robot is unavailable. The control method is based on the fact that forward models are relatively straightforward to learn and local inversions can be obtained via local optimization. We use sparse online Gaussian process inference to obtain a flexible probabilistic forward model and second order optimization to find the inverse mapping. Physical experiments indicate that this approach can outperform state-of-the-art tracking control algorithms in this context.

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PDF Web DOI [BibTex]

PDF Web DOI [BibTex]


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Creating realistic virtual textures from contact acceleration data

Romano, J. M., Kuchenbecker, K. J.

IEEE Transactions on Haptics, 5(2):109-119, April 2012, Cover article (article)

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[BibTex]

[BibTex]


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Simon Game with Data-driven Visuo-audio-haptic Buttons

Castillo, P., Romano, J. M., Kuchenbecker, K. J.

Hands-on demonstration presented at IEEE Haptics Symposium, Vancouver, Canada, March 2012 (misc)

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[BibTex]

[BibTex]


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Refined Methods for Creating Realistic Haptic Virtual Textures from Tool-Mediated Contact Acceleration Data

Culbertson, H., Romano, J. M., Castillo, P., Mintz, M., Kuchenbecker, K. J.

In Proc. IEEE Haptics Symposium, pages: 385-391, Vancouver, Canada, March 2012, Poster presentation given by Culbertson (inproceedings)

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[BibTex]

[BibTex]


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VerroTouch: Detection of Instrument Vibrations for Haptic Feedback and Skill Assessment in Robotic Surgery

Gomez, E. D., Bark, K., McMahan, W., Rivera, C., Remington, A., Lee, D. I., Kuchenbecker, K. J.

In Proc. Annual Meeting of the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), San Diego, California, USA, March 2012, Emerging Technology Poster presentation given by Gomez. Poster available at \href{http://thesagesmeeting.org/}{http://thesagesmeeting.org/} (inproceedings)

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[BibTex]

[BibTex]


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Haptic Vibration Feedback for a Teleoperated Ground Vehicle

Healey, S. K., McMahan, W., Kuchenbecker, K. J.

Hands-on demonstration presented at IEEE Haptics Symposium, Vancouver, Canada, March 2012 (misc)

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[BibTex]

[BibTex]


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A Biofidelic CPR Manikin With Programmable Pneumatic Damping

Stanley, A. A., Healey, S. K., Maltese, M. R., Kuchenbecker, K. J.

Hands-on demonstration presented at IEEE Haptics Symposium, Vancouver, Canada, March 2012, Finalist for Best Hands-on Demonstration Award (misc)

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[BibTex]

[BibTex]


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StrokeSleeve: Real-Time Vibrotactile Feedback for Motion Guidance

Bark, K., Cha, E., Tan, F., Jax, S. A., Buxbaum, L. J., Kuchenbecker, K. J.

Hands-on demonstration presented at IEEE Haptics Symposium, Vancouver, Canada, Vancouver, Canada, March 2012 (misc)

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[BibTex]

[BibTex]


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Pen Tablet Drawing Program with Haptic Textures

Castillo, P., Romano, J. M., Culbertson, H., Mintz, M., Kuchenbecker, K. J.

Hands-on demonstration presented at IEEE Haptics Symposium, Vancouver, Canada, March 2012 (misc)

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[BibTex]

[BibTex]


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Using Accelerometers to Localize Tactile Contact Events on a Robot Arm

McMahan, W., Romano, J. M., Kuchenbecker, K. J.

In Proc. Workshop on Advances in Tactile Sensing and Touch-Based Human-Robot Interaction, ACM/IEEE International Conference on Human-Robot Interaction, Boston, Massachusetts, March 2012, Oral presentation given by McMahan (inproceedings)

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[BibTex]

[BibTex]


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Exploring Presentation Timing through Haptic Reminders

Tam, D., Kuchenbecker, K. J., MacLean, K., McGrenere, J.

Hands-on demonstration presented at IEEE Haptics Symposium, Vancouver, Canada, March 2012 (misc)

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[BibTex]

[BibTex]


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HALO: Haptic Alerts for Low-hanging Obstacles in White Cane Navigation

Wang, Y., Koch, E., Kuchenbecker, K. J.

Hands-on demonstration presented at IEEE Haptics Symposium, Vancouver, Canada, March 2012, Finalist for Best Hands-on Demonstration Award (misc)

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[BibTex]

[BibTex]


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Dry adhesives and methods for making dry adhesives

Sitti, M., Murphy, M., Aksak, B.

March 2012, US Patent App. 13/429,621 (misc)

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[BibTex]

[BibTex]


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VerroTeach: Visuo-audio-haptic Training for Dental Caries Detection

Maggio, M. P., Parajon, R., Kuchenbecker, K. J.

Hands-on demonstration presented at IEEE Haptics Symposium, Vancouver, Canada, March 2012, {B}est Demonstration Award (three-way tie) (misc)

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[BibTex]

[BibTex]


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Recreating the feel of the human chest in a CPR manikin via programmable pneumatic damping

Stanley, A. A., Healey, S. K., Maltese, M. R., Kuchenbecker, K. J.

In Proc. IEEE Haptics Symposium, pages: 37-44, Vancouver, Canada, March 2012, Oral presentation given by Stanley (inproceedings)

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[BibTex]

[BibTex]


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HALO: Haptic Alerts for Low-hanging Obstacles in White Cane Navigation

Wang, Y., Kuchenbecker, K. J.

In Proc. IEEE Haptics Symposium, pages: 527-532, Vancouver, Canada, March 2012, Poster presentation given by Kuchenbecker (inproceedings)

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[BibTex]

[BibTex]


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Approximate Gaussian Integration using Expectation Propagation

Cunningham, J., Hennig, P., Lacoste-Julien, S.

In pages: 1-11, -, January 2012 (inproceedings) Submitted

Abstract
While Gaussian probability densities are omnipresent in applied mathematics, Gaussian cumulative probabilities are hard to calculate in any but the univariate case. We offer here an empirical study of the utility of Expectation Propagation (EP) as an approximate integration method for this problem. For rectangular integration regions, the approximation is highly accurate. We also extend the derivations to the more general case of polyhedral integration regions. However, we find that in this polyhedral case, EP's answer, though often accurate, can be almost arbitrarily wrong. These unexpected results elucidate an interesting and non-obvious feature of EP not yet studied in detail, both for the problem of Gaussian probabilities and for EP more generally.

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Web [BibTex]

Web [BibTex]


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Kernel Topic Models

Hennig, P., Stern, D., Herbrich, R., Graepel, T.

In Fifteenth International Conference on Artificial Intelligence and Statistics, 22, pages: 511-519, JMLR Proceedings, (Editors: Lawrence, N. D. and Girolami, M.), JMLR.org, AISTATS , 2012 (inproceedings)

Abstract
Latent Dirichlet Allocation models discrete data as a mixture of discrete distributions, using Dirichlet beliefs over the mixture weights. We study a variation of this concept, in which the documents' mixture weight beliefs are replaced with squashed Gaussian distributions. This allows documents to be associated with elements of a Hilbert space, admitting kernel topic models (KTM), modelling temporal, spatial, hierarchical, social and other structure between documents. The main challenge is efficient approximate inference on the latent Gaussian. We present an approximate algorithm cast around a Laplace approximation in a transformed basis. The KTM can also be interpreted as a type of Gaussian process latent variable model, or as a topic model conditional on document features, uncovering links between earlier work in these areas.

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PDF Web [BibTex]

PDF Web [BibTex]


Estimation of MIMO Closed-Loop Poles using Transfer Function Data
Estimation of MIMO Closed-Loop Poles using Transfer Function Data

Vardar, Y.

Eindhoven University of Technology, the Netherlands, 2012 (mastersthesis)

Abstract
For the development of high-tech systems such as lithographic positioning systems, throughput and accuracy are the main requirements. Nowadays, the trend to reach demanded accuracy and throughput levels is designing lightweight and consequently more flexible systems. To control these systems with a more effective and less conservative way, control design should go beyond the traditional rigid control and cope with the flexibilities that limit achievable bandwidth and performance. Therefore, conventional loop shaping methods are not sufficient to reach the performance criterions. Since obtaining an accurate parametric model is very complex and time-consuming for these high-tech systems, using well-developed model-based controller synthesis methods is also not a superior option. To achieve desired performance criterions, one solution can be implemented is reducing the gap between model-based and data-based control synthesis methods. In previous research, a method was developed to define the dynamic behavior of the system without a need for a parametric model. By this method transfer function data (TFD), which provides the information on the whole s-plane can be obtained from frequency response data (FRD) of the system. This innovation was a very important step to use data-based techniques for model-based controller synthesis methods. In this thesis firstly the standard technique to obtain TFD defined in [2] is extended. This standard technique to obtain TFD is not compatible with systems with pure integrators. To extend the methodology also for those systems, two techniques, which are altering the contour and filtering the system, are proposed. Then, the accuracy of TFD is investigated in detail. It is shown that the accuracy of TFD depends on the quality of FRD obtained and the computation techniques used to calculate TFD. Then, a technique which enables to determine the closed-loop poles of a MIMO system using TFD is discussed. The validity of the technique is proven with the help of complex function theory and calculus. Also, the factors that prevent determination of the closed-loop poles are discussed. In addition, it is observed that the accuracy of the closed-loop determination method depends on the quality of obtained TFD and the computation techniques. The proposed theory to obtain TFD and determination of closed-loop poles is validated with experiments conducted to a prototype lightweight system. Also, using experimental frequency response data of NXT-A7 test rig, the success of the proposed methodology is validated also for complex systems. Through these experimental results, it can be concluded that this new technique could be very advantageous in terms of ease of use and accuracy to determine the closed-loop poles of a MIMO lightly damped system.

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[BibTex]

[BibTex]


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A new seam-tracking algorithm through characteristic-point detection for a portable welding robot

Chang, D., Son, D., Lee, J., Lee, D., Kim, T., Lee, K., Kim, J.

Robotics and Computer-Integrated Manufacturing, 28, 2012 (article)

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[BibTex]

[BibTex]


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VerroTeach: Visuo-audio-haptic Training for Dental Caries Detection

Maggio, M. P., Parajon, R., Kuchenbecker, K. J.

In Proc. Annual American Dental Educator’s Association (ADEA) Conference, Orlando, Florida, 2012, Oral presentation given by Maggio (inproceedings)

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[BibTex]

[BibTex]


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Automated Tip-Based 2-D Mechanical Assembly of Micro/Nanoparticles

Onal, C. D., Ozcan, O., Sitti, M.

In Feedback Control of MEMS to Atoms, pages: 69-108, Springer US, 2012 (incollection)

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[BibTex]

[BibTex]


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Topological optimization for continuum compliant mechanisms via morphological evolution of traditional mechanisms

Lum, GZ, Yeo, SH, Yang, GL, Teo, TJ, Sitti, M

In 4th International Conference on Computational Methods, pages: 8, 2012 (inproceedings)

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[BibTex]

[BibTex]


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Two-dimensional autonomous microparticle manipulation strategies for magnetic microrobots in fluidic environments

Pawashe, C., Floyd, S., Diller, E., Sitti, M.

IEEE Transactions on Robotics, 28(2):467-477, IEEE, 2012 (article)

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Project Page [BibTex]

Project Page [BibTex]


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A Data-Driven Method for Determining Natural Human-Robot Motion Mappings in Teleoperation

Pierce, R. M., Kuchenbecker, K. J.

In Proc. IEEE International Conference on Biomedical Robotics and Biomechatronics, pages: 169-176, Rome, Italy, 2012, Poster presentation given by Pierce (inproceedings)

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[BibTex]

[BibTex]


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Three-dimensional microfiber devices that mimic physiological environments to probe cell mechanics and signaling

Ruder, W. C., Pratt, E. D., Bakhru, S., Sitti, M., Zappe, S., Cheng, C., Antaki, J. F., LeDuc, P. R.

Lab on a Chip, 12(10):1775-1779, Royal Society of Chemistry, 2012 (article)

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[BibTex]

[BibTex]


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Active visual search in unknown environments using uncertain semantics

Aydemir, Alper, Pronobis, Andrzej, Jensfelt, Patric, Sj, Kristoffer, Aydemir, Alper, Jensfelt, Patric, Aydemir, A, Jensfelt, P, Aydemir, A, Jensfelt, P, others

Transactions, 1, pages: 2329-2335, IEEE, 2012 (article)

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[BibTex]

[BibTex]


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Modelling of conductive atomic force microscope probes for scanning tunnelling microscope operation

Ozcan, O, Sitti, M

IET Micro \& Nano Letters, 7(4):329-333, IET, 2012 (article)

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[BibTex]

[BibTex]


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Shape memory polymer-based flexure stiffness control in a miniature flapping-wing robot

Hines, L., Arabagi, V., Sitti, M.

IEEE Transactions on Robotics, 28(4):987-990, IEEE, 2012 (article)

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[BibTex]

[BibTex]


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Micro-manipulation using rotational fluid flows induced by remote magnetic micro-manipulators

Ye, Z., Diller, E., Sitti, M.

Journal of Applied Physics, 112(6):064912, AIP, 2012 (article)

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Project Page [BibTex]

Project Page [BibTex]


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Cooperative micromanipulation using optically controlled bubble microrobots

Ishii, K. S., Hu, W., Ohta, A. T.

In Robotics and Automation (ICRA), 2012 IEEE International Conference on, pages: 3443-3448, 2012 (inproceedings)

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[BibTex]

[BibTex]


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Remotely addressable magnetic composite micropumps

Diller, E., Miyashita, S., Sitti, M.

Rsc Advances, 2(9):3850-3856, Royal Society of Chemistry, 2012 (article)

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[BibTex]

[BibTex]


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Flapping Wings with DC-Motors via Direct, Elastic Transmissions

Azhar, M., Campolo, D., Lau, G., Sitti, M.

In Proceedings of International Conference on Intelligent Unmanned Systems, 8, 2012 (inproceedings)

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[BibTex]

[BibTex]


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Investigation of bioinspired gecko fibers to improve adhesion of HeartLander surgical robot

Tortora, G., Glass, P., Wood, N., Aksak, B., Menciassi, A., Sitti, M., Riviere, C.

In Engineering in Medicine and Biology Society (EMBC), 2012 Annual International Conference of the IEEE, pages: 908-911, 2012 (inproceedings)

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[BibTex]

[BibTex]


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Magnetic hysteresis for multi-state addressable magnetic microrobotic control

Diller, E., Miyashita, S., Sitti, M.

In Intelligent Robots and Systems (IROS), 2012 IEEE/RSJ International Conference on, pages: 2325-2331, 2012 (inproceedings)

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[BibTex]

[BibTex]


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Low Bitrate Source-filter Model Based Compression of Vibrotactile Texture Signals in Haptic Teleoperation

Chaudhari, R., Çizmeci, B., Kuchenbecker, K. J., Choi, S., Steinbach, E.

In Proc. ACM Multimedia, pages: 409-418, Nara, Japan, 2012, Oral presentation given by {Chaudhari} (inproceedings)

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[BibTex]

[BibTex]


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Robotic Learning of Haptic Adjectives Through Physical Interaction

McMahon, I., Chu, V., Riano, L., McDonald, C. G., He, Q. (., Perez-Tejada, J. M., Arrigo, M., Fitter, N., Nappo, J., Darrell, T., Kuchenbecker, K. J.

In Proc. IROS Workshop on Advances in Tactile Sensing and Touch-based Human-robot Interaction, Vilamoura, Algarve, Portugal, 2012, Oral presentation given by McMahon (inproceedings)

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[BibTex]

[BibTex]


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Shape-Programmable Soft Capsule Robots for Semi-Implantable Drug Delivery

Yim, S., Sitti, M.

Mechatronics, IEEE/ASME Transactions on, 2012 (article)

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Project Page [BibTex]

Project Page [BibTex]


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Control of multiple heterogeneous magnetic microrobots in two dimensions on nonspecialized surfaces

Diller, E., Floyd, S., Pawashe, C., Sitti, M.

IEEE Transactions on Robotics, 28(1):172-182, IEEE, 2012 (article)

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[BibTex]

[BibTex]


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Gecko-Inspired Controllable Adhesive Structures Applied to Micromanipulation

Mengüç, Y., Yang, S. Y., Kim, S., Rogers, J. A., Sitti, M.

Advanced Functional Materials, 22(6):1245-1245, WILEY-VCH Verlag, 2012 (article)

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Project Page [BibTex]

Project Page [BibTex]