The Experts below are selected from a list of 237 Experts worldwide ranked by ideXlab platform
Olivia Berminghammcdonogh - One of the best experts on this subject based on the ideXlab platform.
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regulated reprogramming in the regeneration of Sensory Receptor cells
Neuron, 2011Co-Authors: Olivia BerminghammcdonoghAbstract:Vision, olfaction, hearing, and balance are mediated by Receptors that reside in specialized Sensory epithelial organs. Age-related degeneration of the photoReceptors in the retina and the hair cells in the cochlea, caused by macular degeneration and sensorineural hearing loss, respectively, affect a growing number of individuals. Although Sensory Receptor cells in the mammalian retina and inner ear show only limited or no regeneration, in many nonmammalian vertebrates, these Sensory epithelia show remarkable regenerative potential. We summarize the current state of knowledge of regeneration in the specialized sense organs in both nonmammalian vertebrates and mammals and discuss possible areas where new advances in regenerative medicine might provide approaches to successfully stimulate Sensory Receptor cell regeneration. The field of regenerative medicine is still in its infancy, but new approaches using stem cells and reprogramming suggest ways in which the potential for regeneration may be restored in individuals suffering from Sensory loss.
Thomas A. Reh - One of the best experts on this subject based on the ideXlab platform.
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Regulated reprogramming in the regeneration of Sensory Receptor cells
Neuron, 2011Co-Authors: Olivia Bermingham-mcdonogh, Thomas A. RehAbstract:Vision, olfaction, hearing, and balance are mediated by Receptors that reside in specialized Sensory epithelial organs. Age-related degeneration of the photoReceptors in the retina and the hair cells in the cochlea, caused by macular degeneration and sensorineural hearing loss, respectively, affect a growing number of individuals. Although Sensory Receptor cells in the mammalian retina and inner ear show only limited or no regeneration, in many nonmammalian vertebrates, these Sensory epithelia show remarkable regenerative potential. We summarize the current state of knowledge of regeneration in the specialized sense organs in both nonmammalian vertebrates and mammals and discuss possible areas where new advances in regenerative medicine might provide approaches to successfully stimulate Sensory Receptor cell regeneration. The field of regenerative medicine is still in its infancy, but new approaches using stem cells and reprogramming suggest ways in which the potential for regeneration may be restored in individuals suffering from Sensory loss. © 2011 Elsevier Inc.
Seiji Chonan - One of the best experts on this subject based on the ideXlab platform.
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A Wearable Braille Sensor System With a Post Processing
IEEE ASME Transactions on Mechatronics, 2007Co-Authors: Mami Tanaka, Kaoru Miyata, Seiji ChonanAbstract:This paper is a study on the development of a wearable sensor system for reading Braille. The study is intended to develop a compact tactile sensor system, which uses a polyvinylidene fluoride (PVDF) film for the Sensory Receptor. The sensor is mounted onto a fingertip and moved over Braille manually to obtain the output. Since the unsteady movements yield variations in the waveforms, a robust recognition system has been developed. In this study, the post processing is introduced into the recognition system for the improvement of the performance. Two different methods of post processing are developed and examined. In the first method, an appropriate letter string is generated by evaluating the connectivity of letters with information on signals. In the second method, the dictionary in which letter strings are recorded is incorporated as the prior knowledge. Finally, both the methods of post processing are combined to enhance the performance. The combined post processing is incorporated to the wearable sensor system, and the performance of the sensor system is evaluated experimentally. The results show that the sensor system is effective to recognize Braille.
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Development of a Wearable Braille Sensor with a Robust Recognition System
The First IEEE RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics 2006. BioRob 2006., 2006Co-Authors: Kaoru Miyata, Mami Tanaka, Seiji Chonan, T. NishizawaAbstract:This paper is a study on the development of a wearable sensor system for reading Braille. The study is intended to develop a compact tactile sensor system which uses a PVDF (polyvinylidene fluoride) film for the Sensory Receptor. The sensor is mounted onto a fingertip and moved over Braille manually to obtain the output. Since the unsteady movements yield variations in the waveforms, a robust recognition system is required. The performance of the recognition system is highly affected by the transformation method and the classification method. As the investigation of the transformation method, feature vectors of some different forms are extracted and effective forms are explored. In the classification, two methods based on MLPs (multi-layered perceptrons) are examined. The first method uses plural classifiers, each of which uses the different form of vectors. The next method uses MLPs in the form of dichotomizers to enhance the training quality. The performance of each method is evaluated using test signals. The obtained results show that the robust recognition is achieved appropriately
Olivia Bermingham-mcdonogh - One of the best experts on this subject based on the ideXlab platform.
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Regulated reprogramming in the regeneration of Sensory Receptor cells
Neuron, 2011Co-Authors: Olivia Bermingham-mcdonogh, Thomas A. RehAbstract:Vision, olfaction, hearing, and balance are mediated by Receptors that reside in specialized Sensory epithelial organs. Age-related degeneration of the photoReceptors in the retina and the hair cells in the cochlea, caused by macular degeneration and sensorineural hearing loss, respectively, affect a growing number of individuals. Although Sensory Receptor cells in the mammalian retina and inner ear show only limited or no regeneration, in many nonmammalian vertebrates, these Sensory epithelia show remarkable regenerative potential. We summarize the current state of knowledge of regeneration in the specialized sense organs in both nonmammalian vertebrates and mammals and discuss possible areas where new advances in regenerative medicine might provide approaches to successfully stimulate Sensory Receptor cell regeneration. The field of regenerative medicine is still in its infancy, but new approaches using stem cells and reprogramming suggest ways in which the potential for regeneration may be restored in individuals suffering from Sensory loss. © 2011 Elsevier Inc.
Mami Tanaka - One of the best experts on this subject based on the ideXlab platform.
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Development of a haptic sensor system for quantifying tactile impression of hair
The SICE Annual Conference 2013, 2013Co-Authors: Minori Kakizawa, Mami Tanaka, Naruhito Toyoda, Tomoyuki Kawasoe, Sho Otsuka, Takeshi Okuyama, Takafumi Kono, Atsushi HorihataAbstract:The tactile impression of hair and words to express it are essential elements for measuring the performance of hair care products. However, the use of words and evaluation by people lack precision in that there are individual variations in hair condition as well as variations from one's sense of value. Moreover, precision is further reduced when people evaluate and compare tactile impressions of hair treated with many hair care products. Therefore, an objective and quantitative means of detecting tactile impression is needed. A new haptic sensor system was developed for detecting the tactile impression of hair and for evaluating hair care products. This system measures frictional vibration when rubbing the surface of hair with a polyvinylidene fluoride (PVDF) film. The PVDF film has high sensitivity and its electric response to pressure is similar to that of the finger Sensory Receptor, i.e., the pacinian corpuscle. Therefore, it can detect vibration accurately, and this detected vibration can be related to the tactile impression when touching hair with one's fingers. We also developed artificial hair as the standard model of tactile impression. Samples of artificial hair with various tactile impressions have no individual variations, so precise evaluation and measurement can be performed. We attempted to quantify the tactile impressions of artificial hair and human hair treated with hair care products using the haptic sensor. First, frequency spectra were measured by rubbing the surface of each artificial hair with the haptic sensor. Then, specific frequency ranges of artificial hair were extracted from the frequency spectrum using principal component analysis. As a result, seven principal components that characterize the tactile impression of artificial hair were extracted. The tactile impression of human hair treated with hair care products was evaluated by calculating the correlations between the seven principal component scores of artificial hair and those of treated hair. Thus, this sensor system enables us to detect the tactile impression of hair and to evaluate hair care products precisely and objectively.
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A Wearable Braille Sensor System With a Post Processing
IEEE ASME Transactions on Mechatronics, 2007Co-Authors: Mami Tanaka, Kaoru Miyata, Seiji ChonanAbstract:This paper is a study on the development of a wearable sensor system for reading Braille. The study is intended to develop a compact tactile sensor system, which uses a polyvinylidene fluoride (PVDF) film for the Sensory Receptor. The sensor is mounted onto a fingertip and moved over Braille manually to obtain the output. Since the unsteady movements yield variations in the waveforms, a robust recognition system has been developed. In this study, the post processing is introduced into the recognition system for the improvement of the performance. Two different methods of post processing are developed and examined. In the first method, an appropriate letter string is generated by evaluating the connectivity of letters with information on signals. In the second method, the dictionary in which letter strings are recorded is incorporated as the prior knowledge. Finally, both the methods of post processing are combined to enhance the performance. The combined post processing is incorporated to the wearable sensor system, and the performance of the sensor system is evaluated experimentally. The results show that the sensor system is effective to recognize Braille.
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Development of a Wearable Braille Sensor with a Robust Recognition System
The First IEEE RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics 2006. BioRob 2006., 2006Co-Authors: Kaoru Miyata, Mami Tanaka, Seiji Chonan, T. NishizawaAbstract:This paper is a study on the development of a wearable sensor system for reading Braille. The study is intended to develop a compact tactile sensor system which uses a PVDF (polyvinylidene fluoride) film for the Sensory Receptor. The sensor is mounted onto a fingertip and moved over Braille manually to obtain the output. Since the unsteady movements yield variations in the waveforms, a robust recognition system is required. The performance of the recognition system is highly affected by the transformation method and the classification method. As the investigation of the transformation method, feature vectors of some different forms are extracted and effective forms are explored. In the classification, two methods based on MLPs (multi-layered perceptrons) are examined. The first method uses plural classifiers, each of which uses the different form of vectors. The next method uses MLPs in the form of dichotomizers to enhance the training quality. The performance of each method is evaluated using test signals. The obtained results show that the robust recognition is achieved appropriately
