Isikawa, Japan
Isikawa, Japan

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Shimomura Y.,Kinjo University | Kawabe H.,Kinjo University | Nambo H.,Kanazawa University | Seto S.,Kinjo College | And 2 more authors.
Advances in Intelligent Systems and Computing | Year: 2017

We construct a system for a visually impaired person. On our system, an image is input by a camera, is transformed by an image conversion system, and is provided to the visually impaired person by an eyewear like glasses. If this system is used, a person can move with the eyewear, and also can watch a scene in the position of line of sight. In the eyewear composed of our system, which is made by QDLaser Inc., the image is projected directly onto a retina. QDLaser Inc. has worked on a small-sized scanning optics to be installed inside the glass frame, and has developed the eyewear named Retinal Imaging Laser Eyewear with the trademark of RETISSA. One of remarkable features of RETISSA is focus free. Regardless of the function of a crystalline lens and eyesight, the wearer can see laser scanned full-color image captured by a digital camera installed in the center of the frame connected to a controller. One of other features of RETISSA is an attractive appearance of eyewear. RETISSA also enables universal design like sunglasses and corrective glasses and realizes complete AR. We explain the system and this eyewear. © Springer Science+Business Media Singapore 2017.


Yamakoshi T.,Kanazawa University | Ogawa M.,Kanazawa University | Matsumura K.,Kanazawa University | Miyazaki S.,Kanazawa University | And 5 more authors.
IEEJ Transactions on Electronics, Information and Systems | Year: 2012

The long-term aim of our research is to develop near infra-red spectroscopy for non-invasive measurement of blood alcohol concentrations. The absorption spectrum of ethyl-alcohol could possibly provide the means for such an approach, but the absorption bands of other molecules, such as glucose and acetaldehyde, together with the very low in vivo ethyl-alcohol concentrations (EAC), represent significant analytical challenges. Here we present results of our in vitro investigation of ethyl-alcohol absorption spectra, and the use of multiple linear regression analysis to predict EAC in the presence of glucose and acetaldehyde. We used ethyl-alcohol and mixed solutions of ethyl-alcohol, glucose, and acetaldehyde. The latter were divided into three experimental systems as ethyl-alcohol/glucose, ethyl-alcohol/acetaldehyde, and ethyl-alcohol/glucose/acetaldehyde solutions. The range of EAC used was the same as that found in blood. The results showed good correlation between the actual EAC and the predicted EAC (control; R = 0.99, mean absolute error (MAE) = 0.12 mg/ml: glucose system; R = 0.97, MAE = 0.18 mg/ml: acetaldehyde system; R = 0.99, MAE = 0.23 mg/ml: glucose & acetaldehyde system; R = 0.98, MAE = 0.19 mg/ml). We conclude that the change of glucose and acetaldehyde concentration does not measurably affect the absorption bands of ethyl-alcohol. © 2012 The Institute of Electrical Engineers of Japan.


Seto S.,Kinjo College | Arai H.,Kinjo College | Sugimori K.,Kinjo University | Shimomura Y.,Kinjo University | Kawabe H.,Kinjo University
Assistive Technology Research Series | Year: 2011

Generally, attendance at lecture of hearing impaired is supported by staffs to take a note while hearing a lecture. However, the lecture note cannot express the presence of the voice, which is non-verbal information such as realism of classroom, teacher's voice speed, the loudness and the tone of voice. As a result, it is difficult to grasp the atmosphere in the classroom. In this study, we propose expression techniques giving the hearing impaired the ambient of scene, which we call as "The Ambient Font". In the ambient font, comic's techniques are used, which visualizes non-verbal information. Therefore, the ambient font enables us to give the hearing impaired not only the textual information but also the non-verbal information. © 2011 The authors and IOS Press. All rights reserved.


Kawabe H.,Kinjo University | Sugimori K.,Kinjo University | Shimomura Y.,Kinjo University | Seto S.,Kinjo College
40th International Conference on Computers and Industrial Engineering: Soft Computing Techniques for Advanced Manufacturing and Service Systems, CIE40 2010 | Year: 2010

Generally, in universities it is ordinary that a small number of experts of the note taking support the hearing impaired because of the difficulty of taking a note simultaneously with hearing a lecture. The purpose of this research project is to construct a new note taking system, namely, the note taking system based upon "Quantity Rather Than Quality" concept. The origin of the name of our system is that in our system many beginners of the note taking, who is an alternative way of a skilled note taker, type the text data and finally reproduce the lecture note with the similar quality as experts do. In this study, we present the mathematical model of our note taking system. We confirm that the increase of the number of people brings the improvement of the accuracy of the input result, and the increase of the probability of correct input brings the expectation value of probability under fixing the number of persons. Finally, we give the results of computer simulation of the model and discuss the feasibility of our concept in detail.


Takehiro Y.,Kanazawa University | Matsumura K.,National Institute of Mental Health | Yamakoshi Y.,Chiba University | Hirose H.,Kinjo College | Rolfe P.,Oxford BioHorizons Ltd.
European Journal of Sport Science | Year: 2010

The aims of this study were to assess methods for performing physiological measurements in motor sports, and to carry out a preliminary study in athletes participating in kart racing. The measurement of physiological variables in motor sports is practically challenging, largely due to the restricted space available for sensors and instrumentation and to movement artefacts from driver's operations and car vibration, hence the paucity of publications. We performed a preliminary study of amateur racing kart athletes to assess the performance of basic measurement apparatus and to collect preliminary data on the possible influences of gravity on cardiovascular activity. We measured the vector magnitude of acceleration (G), instantaneous heart rate using electrocardiography, blood pressure with a wrist sphygmomanometer, eardrum temperature (taken as a measure of core body temperature) with a radiation thermometer, and lap time. The instrumentation functioned satisfactorily during karting on a racing circuit. In all participants during driving, heart rate was maintained at approximately 150 beats min 1. Time-frequency analysis of all heart rate data was performed to evaluate cardiac control mechanisms and this suggested that the observed rise in heart rate could be due to sympathetic acceleration. Furthermore, while we do not have sufficient data to draw firm conclusions, it is suggested that the rise in heart rate could be related to the G stresses to which the drivers were subjected. Cross-correlation analysis of the G and heart rate signals was performed in one participant and this showed a statistically significant correlation. We also found a statistically significant decrease in blood pressure (P<0.01) and a rise in eardrum temperature (P<0.01) immediately after the driving period. We conclude that although current sensors and instrumentation can allow basic monitoring of physiological variables in motor sport athletes, further developments are needed to allow more detailed investigations to be performed. Cardiovascular activity in response to G stresses warrants particular detailed investigation. © 2010 European College of Sport Science.


Yamakoshi T.,Kanazawa University | Tanaka N.,Kanazawa University | Yamakoshi Y.,Yu.sys Corporation | Rolfe P.,Oxford BioHorizons Ltd | And 3 more authors.
Transactions of Japanese Society for Medical and Biological Engineering | Year: 2010

Motor racing athletes in the closed-cockpit category are always facing life-threatening situations caused by heat stroke, especially in hot weather. We report here the development of a novel infrared-radiation-type eardrum thermometer, with a built-in earphone, which can be used for continuous measurement in GT car racing. We examined the accuracy of the system for core body temperature monitoring in 10 healthy volunteers (21.8 ± 1.0 (S.D.) yrs) using a temperature controlled water bath. In addition, we assessed the usefulness of the systemunder real racing conditions with 2 professional drivers in the practice session of 2010 SUPER GT International Series Round 4 MALAYSIA being held at the Sepang International Circuit. To examine accuracy two thermistor probes, one inserted into the ear canal and the other beneath the tongue, were used for measurements of eardrum and sublingual temperatures respectively. An infrared eardrum thermometer was inserted into the contra-lateral ear canal. The measured temperatures were recorded at 30-s intervals. The results showed good correlation between the infrared eardrumtemperature and both the direct eardrumtemperature (r = 0.994, n = 1119, p < 0.001) and the sublingual temperature (r = 0.972, n = 1119, p > 0.001). The mean difference between these temperatures was + 0.09 °C, - 0.08 °C, and 1.96 S.D. was 0.21 °C, 0.44 °C, respectively. As for the field test, the systemfunctioned satisfactorily during real racing conditions performed on the racing circuit. These results suggest that our new systemcan be used in a race setting as a reliable core temperature monitor and could help to improve safety of motor sports.


Yamakoshi T.,Kanazawa University | Matsumura K.,National Institute of Mental Health | Yamakoshi Y.,Chiba University | Hirose H.,Kinjo College | And 2 more authors.
Transactions of Japanese Society for Medical and Biological Engineering | Year: 2010

Motor racing drivers may be exposed to thermal stress, which can influence their performance and put them at risk of heat stroke. The aim of the work described here was to monitor core body temperature and other physiological and environmental variables continuously in racing kart drivers and to investigate the relationship between core body temperature and lap-time/lap-time-variability, the latter being an indication of driver performance. As an indication of core temperature we used the eardrum temperature, Teardrum, measured with a modified, extremely-compact radiation thermometer. We also measured instantaneous heart rate, the vector magnitude of acceleration, G, sweat weight, ambient temperature and relative humidity in the racing suit and full-face helmet, Ta(suit)/RHsuit/Ta(met)/RHmet, road temperature, and lap-time. The measuring instruments functioned satisfactorily during karting performed on a racing circuit. In all participants (n= 15: 30.9 ±6.4 S.D. yrs) during driving, we found that Teardrum gradually increased from 36.8°C to 38.2°C It is suggested that the observed rise in Teardrum could be due to the G stresses to which the driver's were subjected, as heat production of the body was increased due to the increased muscle activity against G during driving. In addition, we found that the degradation of the local environment around the body (Ta(suit)/max= 41.0°C,RHsuit/max=96.6%,Ta(met)/max= 41.0 °C, RHmet/max=93.5%) could be also be one of the major factors. We also found a statistically significant correlation between Teardrum and lap-time/lap-time-variability. These results suggest that monitoring of Teardrum could be of considerable importance in protecting racing drivers from heat stroke and assessing their performance during motor racing.


Yamakoshi T.,Kanazawa University | Matsumura K.,National Institute of Mental Health | Kobayashi H.,Kanazawa University | Gotoh Y.,Kanazawa University | Hirose H.,Kinjo College
Transactions of Japanese Society for Medical and Biological Engineering | Year: 2010

Prolonged monotonous driving may lower a driver's awareness level as well as increasing their stress level due to the compulsion to maintain safe driving which may result in an increased risk of a traffic accident. There is therefore an opportunity for technological assessment of driver physiological status to be applied in-car, hopefully reducing the incidence of potentially dangerous situations. As part of our long-term aim to develop such a system, we describe here the investigation of differential skin temperature measurement as a possible marker of a drivers stress level. In this study, after giving informed consent 25 healthy male (n = 18) & female (n = 7) subjects (26.8 ± 8.0 S.D. yrs) were investigated under environment-controlled conditions, whilst being subjected to simulated monotonous travel at constant speed on a test-course. We acquired physiological variables, including facialskin temperature which consists of truncaland peripheralskin temperatures (T s) using thermography, beat-by-beat blood pressure (BP), cardiac output (CO), tota lperipheral resistance (TPR), and normalized pulse volume (NPV) used as an indicator of localperi pheral vascular tone. We then investigated the driver's reactivity in terms of skin temperatures with this background of cardiovascular haemodynamics. We found that the simulated monotonous driving produced a gradualdrop in peripheralTs following the driving stress, which, through interpretation of the TPR and NPV recordings, could be explained by peripheral sympathetic activation. On the other hand, the truncal Ts was not influenced by the stress. These findings lead us to suggest that truncal-peripheral differential Ts could be used as a possible index indicative of the driver's stress. In fact, a significant correlation was confirmed between stress reference of BP and differential skin temperatures.


Lee J.H.,Kanazawa University | Matsumura K.,Kanazawa University | Yamakoshi K.,Kanazawa University | Rolfe P.,Harbin Institute of Technology | And 6 more authors.
IFMBE Proceedings | Year: 2013

Motor racing athletes, especially Grand Touring (GT) car racing drivers in the closed-cockpit category, can face lifethreatening situations caused by heat stroke. In this paper, a novel continuous tympanic temperature monitoring system, that could help to reduce this risk, is presented. The system consists of an earpiece containing an infrared-radiation-type tympanic thermometer and a micro-speaker. We validated the reliability of the system for tympanic temperature monitoring in 10 healthy volunteers (21.8 ± 1.0 S.D. years) using a temperature-controlled water bath. In addition, we evaluated the usefulness of the system with 2 professional drivers under real racing conditions in the 2010 SUPER GT International Series. The results showed strong correlation between the infrared-radiation tympanic temperature obtained by the present system and both the direct tympanic temperature (r = 0.994, n = 1119, P < 0.001) and the sublingual temperature (r = 0.972, n = 1119, P < 0.001) as a reference temperature. The mean difference between these temperatures was +0.09°C, and -0.08°C, and 95 % confidence interval (equal to 1.96 S.D.) was 0.21°C, and 0.44°C, respectively. In the field test, involving real competitive racing under severe conditions on a racing circuit, the system functioned well. These results suggest that our novel system has an acceptable performance in a race setting as a reliable tympanic temperature monitor and could help to improve safety of motor sports. © 2013 Springer-Verlag.

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