The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Seiichiro Katsura - One of the best experts on this subject based on the ideXlab platform.
-
multi dof motion reproduction using motion copying system with velocity constraint
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Shunsuke Yajima, Seiichiro KatsuraAbstract:This paper analyzes the performance of the motion-copying system based on velocity information. In previous studies, the motion-copying system was proposed for storage and reproduction of haptic information. The motion-copying system is expected to be applied to various fields such as industrial applications, training systems, medical and welfare human assist, and so on. In the conventional method, however, the saved motion cannot be reproduced precisely when the environmental location in the motion-Loading Phase is different from that in the motion-saving Phase. To solve this problem, we proposed the motion-copying system based on velocity information. This paper shows that the proposed method is applied to a 2-degree-of-freedom robot, and the performance is discussed. By using the proposal, it is possible to reproduce the saved motion even though the environmental location is shifted parallel. Finally, the validity of the proposed method is verified by experimental results.
-
motion copying system using modal information for motion reproduction
Conference of the Industrial Electronics Society, 2013Co-Authors: Ayaka Matsui, Seiichiro KatsuraAbstract:This paper proposes a motion-copying system using modal information for motion reproduction. A motion-copying system has been proposed as the system of saving and reproducing a human motion. However, the conventional system can not reproduce the stored motion when an environmental location is changed between a motion-saving Phase and a motion-Loading Phase. Then, a velocity-based motion-copying system has been proposed. Although this system can reproduce the stored motion once the system contacts with the environment, it takes time to adapt the different location of environment. To reproduce the human motion which contains vivid haptic information, it is needed to construct a much strict motion-reproduction system. Therefore, the motion-copying system using modal information is proposed in this paper. The proposed method stores and reproduces the estimated force and the differential mode of position responses, while the conventional method uses force and position responses of the human motion. By the proposed method, the stored motion can be reproduced precisely when the environmental location is unknown. The validity of the proposed method is confirmed by experiments.
-
velocity based motion copying system for integrated reproduction of motion components
Conference of the Industrial Electronics Society, 2012Co-Authors: Shunsuke Yajima, Seiichiro KatsuraAbstract:This paper proposes integrated reproduction of saved motion components by using velocity based motion-copying system. A motion-copying system has been studied in order to store and reproduce human haptic information. The motion-copying system is expected to be applied various applications such as industrial applications, training system, medical and welfare human assist, and so on. Above all, this paper considers the skill reproduction by robots. In this field, it is possible to reproduce the various motion by integration of the saved motion components, and the skill which is required some processes of works can be realized according to integrated reproduction of saved motion components. In conventional methods, however, the environmental location is required to know in the motion-Loading Phase. On the other hand, the proposed method can reproduce the saved motion components when the environmental location is unknown in the motion-Loading Phase. Finally, performance of the proposed method is compared with the conventional method by experiments, and the validity is confirmed.
-
velocity based motion copying system for grasping manipulation motion reproduction
IEEE SICE International Symposium on System Integration, 2011Co-Authors: Shunsuke Yajima, Seiichiro KatsuraAbstract:This paper proposes a velocity based motion-copying system for grasping/manipulation motion reproduction. The motion-copying system is able to store and reproduce human motion based on the bilateral control. As the applications, the motion-copying system is expected to be used in various fields such as industrial applications, medical and welfare human assist. In this paper, the motion-copying system is applied to grasping/manipulation motion reproduction. However, by the conventional method, it is difficult to reproduce the saved motion precisely when a diameter of a grasping object in the motion-Loading Phase is different from that in the motion-saving Phase. On the other hand, the proposed method is able to reproduce the saved motion according to the configuration of the object, therefore the diameter of the object needs not to be considered. Performance of the proposed method is compared with the conventional method by simulations, and validity is verified.
Daniel Barthelmes - One of the best experts on this subject based on the ideXlab platform.
-
impact of Loading Phase initial response and cfh genotype on the long term outcome of treatment for neovascular age related macular degeneration
PLOS ONE, 2012Co-Authors: Moreno Menghini, Barbara Kloeckenergruissem, J C Fleischhauer, M M Kurzlevin, Florian K P Sutter, Wolfgang Berger, Daniel BarthelmesAbstract:Objective Factors influencing the outcome of anti-VEGF treatment in neovascular AMD are still investigated. We analyzed the impact of a Loading Phase, the significance of an initial response for the long-term and the effect of the CFH polymorphism (p.His402Tyr) on treatment outcome.
Barbara Kloeckenergruissem - One of the best experts on this subject based on the ideXlab platform.
-
impact of Loading Phase initial response and cfh genotype on the long term outcome of treatment for neovascular age related macular degeneration
PLOS ONE, 2012Co-Authors: Moreno Menghini, Barbara Kloeckenergruissem, J C Fleischhauer, M M Kurzlevin, Florian K P Sutter, Wolfgang Berger, Daniel BarthelmesAbstract:Objective Factors influencing the outcome of anti-VEGF treatment in neovascular AMD are still investigated. We analyzed the impact of a Loading Phase, the significance of an initial response for the long-term and the effect of the CFH polymorphism (p.His402Tyr) on treatment outcome.
Sascha Fauser - One of the best experts on this subject based on the ideXlab platform.
-
fibrovascular pigment epithelial detachment is a risk factor for long term visual decay in neovascular age related macular degeneretion
Retina-the Journal of Retinal and Vitreous Diseases, 2014Co-Authors: Robert Hoerster, Philipp S Muether, Vasilena Sitnilska, Bernd Kirchhof, Sascha FauserAbstract:Background: The individual outcome of anti-vascular endothelial growth factor treatment in neovascular age-related macular degeneration is variable. To investigate the prognostic value of spectral domain optical coherence tomography structures for best-corrected visual acuity (BCVA) outcome, volumetric analysis of spectral domain optical coherence tomography structures was performed in neovascular age-related macular degeneration correlated with BCVA after 24 months. Methods: At the Department of Ophthalmology, University of Cologne, Germany, 75 patients with neovascular age-related macular degeneration were analyzed prospectively over 24 months. Patients received three initial consecutive monthly intravitreal ranibizumab injections followed by monthly spectral domain optical coherence tomography controls. Therapy was continued as a pro re nata regimen. Volumetric analysis of spectral domain optical coherence tomography images was performed using commercially available software (3D-Doctor). Results: Subretinal tissue, subretinal fluid, serous pigment epithelial detachment, and fibrovascular pigment epithelial detachment (FPED) were identified. By contrast to all other structures, FPED did not respond to ranibizumab therapy. Volume of FPED at baseline and after the Loading Phase correlated most with impaired BCVA after 24 months (r = −0.0215, P = 0.9263 [subretinal tissue]; r = −0.3120, P = 0.0216 [subretinal fluid]; r = −0.0757, P = 0.6470 [serous pigment epithelial detachment]; r = −0.4182, P = 0.0111 (FPED baseline); r = −0.4768; P = 0.0002 [FPED after Loading Phase]). Conclusion: Of all identified structures, FPED was most deleterious for BCVA after 24 months. The knowledge about possible BCVA course can influence the decision for more intense treatment regimens.
Ursula Schmidterfurth - One of the best experts on this subject based on the ideXlab platform.
-
morphologic parameters relevant for visual outcome during anti angiogenic therapy of neovascular age related macular degeneration
Ophthalmology, 2014Co-Authors: Christian Simader, Markus Ritter, Matthias Bolz, Gabor Deak, Ulrike Mayrsponer, I Golbaz, Michael Kundi, Ursula SchmidterfurthAbstract:Purpose To identify the effects of anti-angiogenic therapy in neovascular age-related macular degeneration (AMD) in respect to morphologic type and time course and to identify prognostic factors for visual outcome on the basis of standardized optical coherence tomography (OCT) analysis. Design Subanalysis of a prospective, 12-month, multicenter, Phase IIIb trial (Efficacy and Safety of Ranibizumab in Patients with Subfoveal Choroidal Neovascularization Secondary to Age-Related Macular Degeneration [EXCITE]). Participants A total of 353 treatment-naive patients with subfoveal choroidal neovascularization (CNV) receiving quarterly or monthly ranibizumab therapy. Methods Patients were randomized to receive 0.3 mg quarterly, 0.5 mg quarterly, or 0.3 mg monthly doses of ranibizumab. Treatment comprised a Loading Phase of 3 consecutive monthly injections followed by a 9-month maintenance Phase of monthly or quarterly injections. Best-corrected visual acuity (BCVA) was measured using the Early Treatment Diabetic Retinopathy Study protocol, and retinal morphology was assessed by Stratus OCT (Carl Zeiss Meditec, Dublin, CA). Imaging data were evaluated by certified examiners of the Vienna Reading Center using a standardized protocol. Main Outcome Measures The BCVA was measured using ETDRS charts and retinal morphology was assessed by OCT. Results During the Loading Phase, there was a significant correlation between a reduction in central retinal thickness and an increase in BCVA ( P P P = 0.06). Baseline PED showed a negative influence on visual outcome only in combination with IRC and SRF. Conclusions There is a distinct response pattern and time course of morphologic parameters associated with anti-vascular endothelial growth factor therapy in neovascular AMD. Specific alterations, such as IRC, SRF, and PED, as baseline or follow-up features are significantly influencing the potential for visual gain.
