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- 검색키워드
- 저자 : Kaoru NAKADA (검색결과 5 건)
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Analysis on Pathos for Elderly Patient’s Care
Kaoru NAKADA,Hiroshi JUZOJI,Yasumitsu TOMIOKA,Isao NAKAJIMA 한국멀티미디어학회 2011 한국멀티미디어학회 국제학술대회 Vol.2011 No.-
In this paper, we intend to report the idea of sharing pathos via broadband circuit to care elderly patient. We have performed several experiment and confirmed their reaction with the huge display system. It is a small in size of virtual reality environment of CAVE. We believe that the pathos element might be very important to care elderly patient at home via broadband communication circuit.
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Development and physiological assessments of multimedia avian esophageal catheter system
Nakada, Kaoru,Hata, Jun-ichi Korea Multimedia Society 2018 The journal of multimedia information system Vol.5 No.2
We developed multimedia esophageal catheters for use with birds to measure and record ECG and angular velocity while anesthesized, at rest, and in flight. These catheters enable estimates of blood pressure based on readings given by an angular velocity sensor and by RR intervals of ECG affected by EMG. In our experiments, the catheters had the following characteristics: 1. Esophageal catheters offer a topological advantage with 8-dB SNR improvement due to elimination of electromyography (EMG). 2. We observed a very strong correlation between blood pressure and the angular velocity of esophageal catheter axial rotation. 3. The impulse conduction pathway (Purkinje fibers) of the cardiac ventricle has a direction opposite to that of the mammalian pathway. 4. Sympathetic nerves predominate in flight, and RR interval variations are strongly suppressed. The electrophysiological data obtained by this study provided especially the state of the avian autonomic nervous system activity, so we can suspect individual's health condition. If the change of the RR interval was small, we can perform an isolation or screening from the group that prevent the pandemics of avian influenza. This catheter shall be useful to analysis an avian autonomic system, to perform a screening, and to make a positive policy against the massive infected avian influenza.
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Packet Transceiver on 2.4GHz for Whooper Swan
Nakada, Kaoru,Nakajima, Isao,Hata, Jun-ichi,Ta, Masuhisa Korea Multimedia Society 2018 The journal of multimedia information system Vol.5 No.2
We devised a bird-borne transceiver unit for S-band packet radio communications based on the CC2500 transceiver, a device manufactured by Texas Instruments (TI). Our assessments determined the optimal parameters needed to achieve successful bird-to-center communication over a distance of 18 km and bird-to-bird communication over a distance of 200 m. These parameters included optimal modulation methods, transmission rates, and antennas. We equipped the transceiver unit with a modified dipole antenna (collinear antenna), which we tested in a 10 m anechoic chamber. Our experimental assessments and circuit design review identified the following parameters: 2FSK modulation method; 14.28 kHz frequency shift; 101.56 kHz IF reception bandwidth; and Manchester encoding (+). Our assessments showed bird-to-bird communications could be achieved over a distance of 200 m assuming MSK, FEC (+), and 500 kbps. Following tests by an official body, we obtained 28 sets of a type approval license for 2.4 GHz. In cooperation with the Yamashina Institute for Ornithology, we attempted to tag and release six or more swans. This unit gives us the ability to obtain vital data on swans. We expect this data to provide significant benefits, including clues on improving screening for infected individuals.
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Light-Reflex Measurements Implemented with Laplacian Filter
Kaoru NAKADA,Hiroshi JUZOJI,Isao NAKAJIMA 한국멀티미디어학회 2011 한국멀티미디어학회 국제학술대회 Vol.2011 No.-
We summarize herein the results of research and development concerning a compact light-reflex pupillometer designed for use in emergency vehicles. Conventional methods of analog pupillary light reflex examinations performed in emergency vehicles are associated with errors that result In inaccurate measurements of changes in pupil size. To establish a simple method for quantifying nervous function in prehospital care, we applied an image processing technique based on the Laplace transform for video images captured by a CCD camera. This method produces more accurate measurements of rates of change in pupil size. While this method can be used to assess both direct and consensual light reflexes, we focused in our study on developing a direct light reflex measuring instrument because this choice presents greater technical challenges and offers the potential for a device of significantly smaller dimensions. The performance of the prototype was determined to be satisfactory. Personnel in emergency vehicles equipped with this pupillometer should be able to form objective assessments of pupil contraction rates before arrival at the hospital. We believe this pupillometer will prove useful in primary care and in selecting appropriate destination hospitals by facilitating patient assessments performed during transport, including neurological evaluations, assessments of consciousness, and confirmation of medical history items such as dementia or diabetes.
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Study on Vibration Energy Harvesting with Small Coil for Embedded Avian Multimedia Application
Nakada, Kaoru,Nakajima, Isao,Hata, Jun-ichi,Ta, Masuhisa Korea Multimedia Society 2018 The journal of multimedia information system Vol.5 No.1
We have developed an electromagnetic generator to bury in subcutaneous area or abdominal cavity of the birds. As we can't use a solar battery, it is extremely difficult to supply a power for subcutaneous implantation such as biosensors under the skin due to the darkness environment. We are aiming to test the antigen-antibody reaction to confirm an avian influenza. One solution is a very small generator with the electromagnetic induction coil. We attached the developed coil to chickens and pheasants and recorded the electric potential generated as the chicken walked and the pheasant flew. The electric potential generated with physical simulator is equal to or exceeds the 7 V peak-to-peak at maximum by 560/min of flapping of wings. Even if we account for the junction voltage of the diode (200 mV), efficient charging of the double-layer capacitor is possible with the voltage doubler rectifier. If we increase the voltage, other problems arise, including the high-voltage insulation of the double-layer capacitor. For this reason, we believe the power generated to be sufficient for subcutaneous area of birds. The efficiency, magnetic 2 mm in length and coil 15mm in length, if axial direction is rectified, the magnetic flux density given to the coil could calculated to 7.1 % and generated power average 0.47mW. The improvements in size and wire insulation are expected in the future.
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