• Journal of Korean Public Health Nursing
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• v.14 no.2
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• pp.271-280
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• 2000

The purpose of this study was to identify the health status of elderly. Subjects were 132 older people who live in home and institution located Taejon metropolitan city. Data were collected from May 1997 to April 1998. To obtain data about health status of elderly. pulse, respiration, systolic and diastolic blood pressure. grip strength. pinch pressure. flexibility, arm circumference. triceps skin fold thickness were measured. Data were analyzed for frequency. percentage. t-test using SPSS pc+ program. The results were as follows: 1. $74.4\%$ of subjects was perceived as 'good' in their health status. 2. Mean pulse, mean respiration, systolic and diastolic blood pressure were with in normal limits. There were no statistical differences between men and women in pulse, respiration, systolic and diastolic pressure. 3. Left and right grip strength were 24.89 psi and 25.23psi. The grip strength in men was higher than that of women. It showed statistically difference between men and women in grip strength. 4. Left and right pinch pressure were 7 pound and 7.32 pound. There was statistically difference of pinch pressure between men and women. 5. left flexibility was better than right flexibility of subjects. There was no statistically significant difference between men and women in flexibility. 6. Arm circumference was 24.96cm and there was no statistically significant difference between men and women. 7. Mean skin fold thickness was 12.83 em. Skin fold thickness in men was lower than that of women. It showed statistically difference between men and women. From these results, further study should be considered gender differences in health status of elders and carried in larger sample than this study.

• Journal of Advanced Navigation Technology
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• v.24 no.4
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• pp.322-327
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• 2020

Recently, a research on obtaining a vital signal using a Doppler radar has been developed and is used as a technology applied to patients in bed. However, in the case of the measured pulse, the respiration signal is generated as noise, resulting in a problem of lowering accuracy. In this paper, we propose a bio-signal measurement algorithm based on the sampling point to improve the accuracy of the signal for measuring the pulse rate when measuring bio-signals using a Doppler radar. The proposed algorithm improves the accuracy of the measured bio-signal by removing noise generated when measuring biosignals based on two sampling points. Compared with actual medical equipment and existing bio-signal algorithms, it is more than 90% similar to medical equipment. In addition, it was confirmed that severe amplitude change was minimized compared to the existing algorithm.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.24 no.9
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• pp.1215-1223
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• 2020

Recently, the number of natural disasters caused by inclement weather conditions such as localized heavy rainfall, Typhoon, etc. is increasing in Korea, which requires relevant prevention and water management measures. Rain gauges installed on the ground have strengths in continuously·directly measures ground precipitation but cannot provide accurate information on spatial precipitation distribution in the areas without the rain gauges. The present research has designed and developed an electromagnetic-based multi-purpose precipitation gauge(EWRG, Electromagnetic Wave Rain Gauge) that can measure rainfall at the real time, by overcoming spatial representativeness. In this paper, we propose an FPGA-based signal processing design method for EWRG. The signal processing of the EWRG was largely designed by calculating the ADC and DDC of the LFM waveform, pulse compression, correlation coefficient and estimating the precipitation parameter. In this study, the LFM waveform and pulse compressed signal were theoretically analyzed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.9
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• pp.4053-4064
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• 2012

The purpose of this study was to examine the effects of aroma foot reflexology and foot reflexology on blood pressure, pulse rate and blood lipid level of elderly essential hypertensive patients in a rural area. The research method was a non-equivalent control group pretest-posttest quasi-experimental design and the participants were consisted of 71 elderly patients with essential hypertension who were being registered at C health Clinic(G gun, Chungnam province). Here, we compared experimental group I(aroma foot reflexology) 24 persons, experimental group II(foot reflexology) 27 persons and control group(conventional treatment) 20 persons to measure the effect. The data were analyzed with SPSS/WIN 12.0. The systolic blood pressure(p<.05), the diastolic blood pressure(p<.05), and the pulse rates(p<.01) of experimental group I and II after intervening respectively with aroma foot reflexology, and foot reflexology for 6 weeks were significantly decreased than the control group, but the blood lipid level was no significant difference among 3 groups(p>.05). In conclusion, both of aroma foot reflexology and foot reflexology had positive effects to decrease the blood pressure and pulse rates of the elderly essential hypertensive patients in a rural area and would be utilized as a nursing intervention for them.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.24 no.2
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• pp.65-69
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• 2014

Crystallographic phases of Plasma electrolytic oxidized Al alloy, A1100, A5052, A6061, A6063, A7075, were investigated. Two types of electrolyte $Na_2Si_2O_3$ and Na2P2O7 were also compared. Bipolar pulse, $2000{\mu}sec$ with $400{\mu}sec+420V$ impulse and $300{\mu}sec$ - impulse were applied for 20 min. ${\alpha}-alumina$, ${\gamma}-alumina$, ${\eta}-alumina$, $Al_{4.95}Si_{1.05}O_{9.52}$, and $(Al_{0.9}Cr_{0.1})_2O_3$ were mainly observed. Si, component of electrolyte, were moved into the PEO layer by bipolar pulse. Glassy phase was also observed at the surface of $Na_2Si_2O_3$ electrolyte treated PEO layer, and increased with the Mg content of Al alloy. It is concluded that at first glassy phase was formed by the micro plasma, and the high temperature of plasma turns glassy phase to several crystalline phases. And we could expect that many other crystalline phase could be formed by PEO process.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.24 no.2
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• pp.59-64
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• 2014

Crystallographic phases of Plasma electrolytic oxidized Al alloy, A1050, were investigated. The electrolyte of PEO was $Na_2Si_2O_3$ and KOH. Unipolar pulse, $ 2000{\mu}sec$ with $400{\mu}sec+420V$ impulse, were applied for 2 min, 5 min, 15 min, and 30 min. ${\gamma}-Alumina$, as well as ${\alpha}-alumina$, was main crystal phase. ${\gamma}-Alumina$ was appeared in the beginning, then the amount of ${\alpha}-alumina$ was increased with time, but the amount of ${\gamma}-Alumina$ remained constant without any increasing. So, it is concluded that plasma gas produce ${\gamma}-Alumina$ at the first, and then ${\gamma}-Alumina$ transform ${\alpha}-alumina$ finally. During the transformation, high temperature of micro plasma gives transformation energy.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.24 no.1 s.173
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• pp.52-61
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• 2000

The role of quantitative nondestructive evaluation of defects is becoming more important to assure the reliability and the safety of structure, which can eventually be used for residual life evaluation of structure on the basis of fracture mechanics approach. Although ultrasonic technique is one of the most widely used techniques for application of practical field test among the various nondestructive evaluation technique, there are still some problems to be solved in effective extraction and classification of ultrasonic signal from their noisy ultrasonic waveforms. Therefore, crack size determination through a neural network based on the back-propagation algorithm using back-scattered ultrasonic signals is established in this study. For this purpose, aluminum plate containing vertical or inclined surface breaking crack with different crack length was used to receive the back-scattered ultrasonic signals by pulse echo method. Some features extracted from these signals and sizes of cracks were used to train neural network and the neural network's output of the crack size are compared with the true answer.

• Journal of Environmental Science International
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• v.24 no.3
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• pp.353-358
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• 2015

In this study, we analyzed two types of echolocation calls used by the parti-coloured bat, Vespertilio sinensis. Bats were captured in the Naejangsan National Park in October 2013. Call sounds of hand-released bats were recorded at the location of capture within the National Park. We analyzed pulse duration (PD), pulse interval (PI), peak frequency (PF), maximum frequency ($F_{MAX}$), minimum frequency ($F_{MIN}$), and bandwidth (BW). V. sinensis emitted the different types of the echolocation calls depending on the surrounding environment. Frequency modulated-constant frequency (FM-CF) signal of audible range was emitted when they flew in the uncluttered space over the canopy. However, when flying in the cluttered space below the canopy, they only emitted FM signal. FM-CF signal is in the audible range (e.g., low frequency), and FM signal has a harmonic broadband frequency range of two. There were significant differences in PD, PI, PF, FMAX, FMIN, and BW between the calls emitted over and below the canopy. Considering the functional characteristics of FM and CF signals, we conclude that the foraging activity of V. sinensis was observed below the canopy, and recommend the use of FM signal and broadband as echolocation signals.

• The Journal of Korean Academic Society of Nursing Education
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• v.13 no.2
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• pp.169-176
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• 2007

Purpose: The purpose of this study was to verify the effect of aromatherapy hand massage on stress responses and serum Immunity of RN's before the night duty. Method: The data were collected during the period from Oct. 10 to Nov. 15, 2005 at S-Hospital in Seoul. There were forty-eight subjects, 24 for the experimental and 24 for the control group. A Pre & post test were conducted to measure pulse rate, perceived stress(level and score) and a blood sample for cortisol and IgA. In the experimental group, lavender and geranium were used. Data were analyzed by descriptive statistics, $x^2$-test and t-test with SPSS program. Result: The pulse rate was reduced but there were no significant differences between the two groups. Scores of subjective stress(VAS) decreased significantly after aromatherapy hand massage and the level of serum Cortisol was reduced significantly. The level of serum IgA was elevated significantly. Conclusion: Aromatherapy hand massage could be a useful intervention to reduce stress and elevate the immunity of nurses during the night duty.

• Journal of Korean Medical classics
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• v.24 no.6
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• pp.15-28
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• 2011

Gwan-Gyeok(關格) is one of the dangerous conditions that can lead to death and is considered important in clinical practice. However its true concept is unclear and arguments on the subject have been diverse over generations. This kind of confusion is largely due to an insufficient understanding of the study results on Nangyeong(難經). In Nangyeong, Gwan-Gyeok is divided into 'in bowels(在腑)' and 'in viscera(在臟) and distinction is made between 'damaged by heat(傷熱)' and 'damaged by dampness(傷濕) thus establishing a broad outline of differentiation of syndrome(辨證). Moreover, the clinical progress is systematically divided into 3 stages thus providing a very useful viewpoint on diagnostics. A sharp perspective on the pathogenesis is also shown by emphasizing the kidney and Myeongmun(命門) through the comparison between cheok pulse(尺) and chon pulse(寸). This point of view in Nangyeong is truly proposing a permanent standard on the understanding of Gwan-Gyeok. Therefore it is the author's hope that this study will work as a start to look back on the flow of the research on Gwan-Gyeok which has been rather confusing since Sanghallon(傷寒論).