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An Abduction-Based Method for Index Relaxation in Taxonomy-Based Sources [chapter]

Carlo Meghini, Yannis Tzitzikas, Nicolas Spyratos
2003 Lecture Notes in Computer Science  
We introduce an operation that extends a taxonomy-based source with possibilities, and then study the property of this operation from a mathematical point of view.  ...  We view an information source as an agent, operating according to an open world philosophy.  ...  knowledge base in S taxonomy plays the role of the theory T h; the role of manifestation, for a fixed object, is played by the index of the object.  ... 
doi:10.1007/978-3-540-45138-9_53 fatcat:6mbwzrlp7bak7lkxqu7lhozvxy

Abduction for Extending Incomplete Information Sources [chapter]

Carlo Meghini, Yannis Tzitzikas, Nicolas Spyratos
2006 Lecture Notes in Computer Science  
By equating reasonableness with logical implication, the sought expansion turns out to be an explanation of the index, captured by abduction.  ...  of the taxonomy.  ...  There can be two sources of redundancy when extending a non-redundant index with the solutions to an abduction problem: (1) a solution to an abduction problem may contain taxonomical cycles, and including  ... 
doi:10.1007/11752912_28 fatcat:vworqrriqffnhpiguttoefvstu

A Unifying Framework for Flexible Information Access in Taxonomy-Based Sources [chapter]

Yannis Tzitzikas, Carlo Meghini, Nicolas Spyratos
2004 Lecture Notes in Computer Science  
A taxonomy-based source consists of a taxonomy and a database storing objects that are indexed in terms of the taxonomy.  ...  , index relaxation/contraction, feedback and adaptation mechanisms.  ...  Indeed, there are several approaches for constructing in polynomial time the taxonomy of concepts of a DL knowledge base (e.g. see [14] ).  ... 
doi:10.1007/978-3-540-25957-2_14 fatcat:3lewdd3xvrd7zgqtcy5rfbkdle

Towards a Generalized Interaction Scheme for Information Access [chapter]

Yannis Tzitzikas, Carlo Meghini, Nicolas Spyratos
2004 Lecture Notes in Computer Science  
We give the foundations of this interaction manager from a mathematical point of view, in terms of an abstract view of an information source.  ...  /reduction, query relaxation/restriction, index relaxation/contraction, "relevance" feedback, and adaptation facilities.  ...  Acknowledgements The first author wants to thank his wife for being an endless source of happiness and inspiration.  ... 
doi:10.1007/978-3-540-24627-5_19 fatcat:yex4yohfnnaovpaaertdbjh2hy

A quantitative taxonomy of human hand grasps

Francesca Stival, Stefano Michieletto, Matteo Cognolato, Enrico Pagello, Henning Müller, Manfredo Atzori
2019 Journal of NeuroEngineering and Rehabilitation  
The taxonomies of hand grasps that have been proposed in scientific literature so far are based on qualitative analyses of the movements and thus they are usually not quantitatively justified.  ...  A proper modeling of human grasping and of hand movements is fundamental for robotics, prosthetics, physiology and rehabilitation.  ...  Acknowledgements The authors would like to thank all subjects participating in the NinaPro data acquisitions.  ... 
doi:10.1186/s12984-019-0488-x pmid:30770759 pmcid:PMC6377750 fatcat:3mzk4h5qkbgzrkp7zveiksou7m

Design of the Anatomically Correct, Biomechatronic Hand [article]

Benedek Jozsef Tasi, Miklos Koller, Gyorgy Cserey
2019 arXiv   pre-print
This study aims to promote how anatomically accurate design considerations can assist in consequentially attaining more human-like functionality, while still allowing for robust structural elements towards  ...  advancing research in hand biomechanics, prosthetics and teleoperation.  ...  ACKNOWLEDGMENT The authors would like to thank the colleagues of the Robotics Laboratory at PPCU-FIT for their help during the various stages of the workflow, Varinex Zrt. for their assistance in the production  ... 
arXiv:1909.07966v1 fatcat:wwu2qvj5qvgplnvbejen3sf64e

From the Classification of EMG Signals to the Development of a New Lower Arm Prosthesis

Giuseppe Lisi, Paolo Belluco, Dario Cattaneo, Giuseppina Gini
2011 IFAC Proceedings Volumes  
The movements are chosen with the aim of producing a valid base for complex manipulation tasks.  ...  The goal is to create an association between a predefined set of hand/wrist motion patterns and the corresponding EMG signals generated by the forearm muscles.  ...  The two errors are in recognizing wrist extension or thumb abduction for the last two subjects, namely a teenager fat boy and a middle aged woman; for both the muscular tone is low.  ... 
doi:10.3182/20110828-6-it-1002.02097 fatcat:warzngyflrdgfaqhdm565mmn6u

Design of a highly biomimetic anthropomorphic robotic hand towards artificial limb regeneration

Zhe Xu, Emanuel Todorov
2016 2016 IEEE International Conference on Robotics and Automation (ICRA)  
on hand taxonomy.  ...  A wide range of research areas, from telemanipulation in robotics to limb regeneration in tissue engineering, could benefit from an anthropomorphic robotic hand that mimics the salient features of the  ...  Christopher Allan at the HarborView Medical Center for his help on guiding the cadaver hand dissection, and thank Svetoslav Kolev for his help on setting up Vicon experiments.  ... 
doi:10.1109/icra.2016.7487528 dblp:conf/icra/XuT16 fatcat:3oejqoxvuja7tkchv5jkno7vua

Towards a generalized model of diagnostic behaviour

E.T. Keravnou, L. Johnson
1989 Knowledge-Based Systems  
The modelS use can be seen as being twofold: first as an aid in the construction of more adequate shells for diagnostic tasks; and second, and more importantly, as the initial (albeit crude) interpretation  ...  We believe that only a framework which is a global model of human diagnostic reasoning can form an adequate basis for such a combination.  ...  If an expectation violation is thus detected, which points in the direction of an opposing hypothesis, a contextual abductive step has occurred.  ... 
doi:10.1016/0950-7051(89)90021-x fatcat:hjeurijjtbdoblpdvjr3fwh4km

Intensional answers to database queries

A. Motro
1994 IEEE Transactions on Knowledge and Data Engineering  
In addition to data, database systems store various on keys, integrity constraints, class hierarchies), are often kinds of information about their data.  ...  but little else is assumed. integrity constraints, to state required relationships among the Notable examples of this approach are the various attempts data; and inference rules, to define new classes in  ...  The method is complete, in the sense that the inference engine used for deduction and abduction could generate all possible conclusions (intensional statements) from the induced set of rules.  ... 
doi:10.1109/69.334858 fatcat:6uepmxm4pra6dnwvtca4j7ekcm

Distance Geometry and Data Science [article]

Leo Liberti
2019 arXiv   pre-print
Many common tasks in data science are based on distances between entities.  ...  We discuss applications, solution methods, dimensional reduction techniques and some of their limits.  ...  Salazar, the Editor-in-Chief of TOP, for inviting me to write this survey.  ... 
arXiv:1909.08544v1 fatcat:5m6n4lozsra6fbo27gqymi2fte

Distance geometry and data science

Leo Liberti
2020 TOP - An Official Journal of the Spanish Society of Statistics and Operations Research  
Many common tasks in data science are based on distances between entities.  ...  We discuss applications, solution methods, dimensional reduction techniques, and some of their limits.  ...  Salazar, the Editor-in-Chief of TOP, for inviting me to write this survey.  ... 
doi:10.1007/s11750-020-00563-0 fatcat:xh3xjiir6nbdpnspyipehcayu4

Kinematic synergies of hand grasps: a comprehensive study on a large publicly available dataset

Néstor J. Jarque-Bou, Alessandro Scano, Manfredo Atzori, Henning Müller
2019 Journal of NeuroEngineering and Rehabilitation  
It allows to define metrics for motor assessment and rehabilitation, to develop assistive devices and prosthesis control methods.  ...  for the tasks and subjects, which can limit the impact on rehabilitation and assistive applications.  ...  Acknowledgements The authors are grateful for funding from the Spanish MINECO and the European Union (FEDER funds) through project DPI2014-52095-P and FPI grant BES-2015-072480.  ... 
doi:10.1186/s12984-019-0536-6 pmid:31138257 pmcid:PMC6540541 fatcat:5biauyx35nefdc3oup2q4qtuom

Soft robotic suits: State of the art, core technologies and open challenges [article]

Michele Xiloyannis, Ryan Alicea, Anna-Maria Georgarakis, Florian L. Haufe, Peter Wolf, Lorenzo Masia, Robert Riener
2021 arXiv   pre-print
In this paper, we start by giving a definition of soft robotic suits and proposing a taxonomy to classify existing systems.  ...  Finally, we discuss the impact of this new technology on human movements, for both augmenting human function and supporting motor impairments, and identify areas that are in need of further development  ...  (c) The tendon-driven robotic device in [75] , for supporting the elbow joint against gravity. (d) The device presented in [86] , to support shoulder abduction, using an inflatable PIA.  ... 
arXiv:2105.10588v1 fatcat:qdhok4zqqban5i7rvc2eftpybq

EMG Based Gesture Recognition Using the Unbiased Difference Power

Kimoon Kang, Hyun-Chool Shin
2021 Applied Sciences  
In this paper, we propose an unbiased difference power that is robust against noise as a feature for electromyography (EMG)-based gesture recognition.  ...  For performance evaluation, we used EMG signals provided by the open source Ninapro project database. We used the recognition accuracy as an evaluation index.  ...  For performance evaluation, the recognition accuracy is used as an index. Moreover, we compared the results using the proposed unbiased feature with the results of the other two cases.  ... 
doi:10.3390/app11041526 fatcat:frqjddlrzjdwpc5rmoubilfo4i
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