• Journal of Korean Ophthalmic Optics Society
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• 제1권1호
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• pp.103-108
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• 1996

In this experiments, we introduce the simple method measuring the refractive index and it measured for severial materials compare with real values. Refractive index of distillation water, ethyl alcohol and acryl were $1.32{\pm}0.006$, $0.36{\pm}0.01$ and $0.48{\pm}0.005$, respectively.

• Journal of the Korean Home Economics Association
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• 제25권1호
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• pp.51-58
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• 1987

This study was undertaken to investigate changes in blood pressure and heart rate in normal cats by administration of Korean native green tea. The chemical components of Korean native green tea which determined are water(2.2%), water extract(32.7%), vitamin C(480%), caffeine(2.6%), tannin(32.7%) and amino acid of water soluble content 5.8%. Effect on blood pressure in administration 100mg/kg, 300mg/kg, 500mg/kg of extract of green tea, the mean depressor response is 44.8$\pm$3.3mmHg, 60.5$\pm$3.6mmHg, and 65.0$\pm$3.3mmHg in normal cats. Effect on heart rate in administration 100mg/kg, 300mg/kg of extract of Korean native green tea, the mean decreased heart rate is 2.8$\pm$4.5 beats/min, 15.2$\pm$6.4beats/min and 19.1$\pm$4.0 beats/min.

• Journal of Korean Physical Therapy Science
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• 제11권1호
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• pp.14-19
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• 2004

Objective : This study obtained normative values for variable parameters of lumbar function with the isoinertial triaxial dynamometer in patients with chronic low back pain. Subjects and Methods : 30 patients(male 15, female 15) with chronic low back pain in this study. Variable parameters that were measured with the Isostation B-200 were lumbar range of motion, isometric maximum torques, and maximum velocities in three axis. Results : In patient male group mean R.O.M. was $82.9{\pm}12.5$ degrees in lumbar rotation, $76.5{\pm}17.1$ degrees in lumbar flexion/extension, and $64.3{\pm}14.5$ degrees in lumbar lateral flexion. In patient female group mean R.O.M. was $78.4{\pm}18.5$ degrees in lumbar rotation, $71.7{\pm}20.4$ degrees in lumbar flexion/extension, and $63.2{\pm}14.4$ degrees in lumbar lateral flexion. In patient male group mean isometric maximum torques was $64.7{\pm}23.8ft-lbs$ in lumbar rotation, $81.1{\pm}42.0ft-lbs$ in lumbar flexion, $122.2{\pm}43.6ft-lbs$ in lumbar extension, and $101.0{\pm}37.0ft-lbs$ in lumbar lateral flexion. In patient female group mean isometric maximum torques was $41.9{\pm}9.2ft-lbs$ in lumbar rotation, $49.9{\pm}23.9ft-lbs$ in lumbar flexion, $90.1{\pm}26.8ft-lbs$ in lumbar extension, and $62.0{\pm}16.7ft-lbs$ in lumbar lateral flexion. In patient male group mean maximum velocity of isoinertial exercise with low (25%) resistance was $102.4{\pm}28.8deg/sec$ in lumbar rotation, $108.9{\pm}32.2deg/sec$ in lumbar flexion/extension, and $103.5{\pm}30.4deg/sec$ in lumbar lateral flexion. In patient female group mean maximum velocity of isoinertial exercise with low (25%) resistance was $84.1{\pm}24.4deg/sec$ in lumbar rotation, $93.2{\pm}32.9deg/sec$ in lumbar flexion/extension, and $98.5{\pm}33.7deg/sec$ in lumbar lateral flexion. In patient male group mean maximum velocity of isoinertial exercise with high (50%) resistance was $74.0{\pm}20.9deg/sec$ in lumbar rotation, $98.7{\pm}32.8deg/sec$ in lumbar flexion/extension, and $85.0{\pm}25.8deg/sec$ in lumbar lateral flexion. In patient female group mean maximum velocity of isoinertial exercise with high (50%) resistance was $67.3{\pm}26.4deg/sec$ in lumbar rotation, $82.5{\pm}31.0deg/sec$ in lumbar flexion/extension, and $79.7{\pm}23.9deg/sec$ in lumbar lateral flexion. Conclusion : Maximum isoinertial velocities were more reliable and more significant than isometric maximum torque for the objective assessment of chronic low hack pain.

• Korean journal of applied entomology
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• 제7권
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• pp.27-32
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• 1969

The purplish stem borer (Sesamia inferens Walker). which was infested in southern part of Korea. attack rice plant. and its damage appear quite serious in some districts. This study was conducted to investigate the life history. seasonal abundance and control of the insect pest. The pest overwinter as larvae and it seems to have 2-3 generations in a year. It takes 56.6 days in the shortest one while the longest one takes 74.6 days. Three peaks of moth appearance are May-June. end of July and end of August, respectively. The effectivencess of insecticides was compared with EPNec $45\%$ and the different granular insecticides in pot experiment. In the result. M. Parathion G. EPNec, Diazinon G and Lebaycid G showed good control of the pest. with the infestation of $12.0,\; 22.9\%,\; 24.7\%,\; and\; 27.3\%$ respectively, while the untreated has $62.6\%$

• Journal of Korean Society for Atmospheric Environment
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• 제32권3호
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• pp.329-341
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• 2016

Pohang is a well-known industrial city in Korea with a large steel-industrial complexes. The biggest environmental issue in the city is associated with fine particulate matter (hereinafter, $PM_{10}$). The concentration of $PM_{10}$ is generally dependent on the local emission sources and meteorological conditions. Iron and steel industrial complexes are likely serious pollution sources of $PM_{10}$ in Pohang. In this study, daily $PM_{10}$ data from a large database from the year of 2000 to 2012 were statistically analyzed, together with meteorological data. The average concentrations of $PM_{10}$ were evaluated according to the frequency of Asian dust, haze, mist, and fog. The number of days exceeding short-term standard for $PM_{10}$ were also examined, taking into consideration of weather conditions. It was found that the concentration of $PM_{10}$ was reduced about 18% to 26% because of precipitation. In addition, the effects of wind direction and wind speed on the $PM_{10}$ concentrations were investigated.

• Journal of the Korean Society of Safety
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• 제32권5호
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• pp.157-167
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• 2017

Millions of People die every year from diseases caused by exposure to outdoor air pollution. Especially, one of the most severe types of air pollution is fine particulate matter (PM10, PM2.5). South Korea also has been suffered from severe PM. This paper analyzes regional risks induced by PM10 and PM2.5 that have affected domestic area of Korea during 2014~2016.3Q. We investigated daily maxima of PM10 and PM2.5 data observed on 284 stations in South Korea, and found extremely high outlier. We employed extreme value distributions to fit the PM10 and PM2.5 data, but a single distribution did not fit the data well. For theses reasons, we implemented extreme mixture models such as the generalized Pareto distribution(GPD) with the normal, the gamma, the Weibull and the log-normal, respectively. Next, we divided the whole area into 16 regions and analyzed characteristics of PM risks by developing the FN-curves. Finally, we estimated 1-month, 1-quater, half year, 1-year and 3-years period return levels, respectively. The severity rankings of PM10 and PM2.5 concentration turned out to be different from region to region. The capital area revealed the worst PM risk in all seasons. The reason for high PM risk even in the yellow dust free season (Jun. ~ Sep.) can be inferred from the concentration of factories in this area. Gwangju showed the highest return level of PM2.5, even if the return level of PM10 was relatively low. This phenomenon implies that we should investigate chemical mechanisms for making PM2.5 in the vicinity of Gwangju area. On the other hand, Gyeongbuk and Ulsan exposed relatively high PM10 risk and low PM2.5 risk. This indicates that the management policy of PM risk in the west side should be different from that in the east side. The results of this research may provide insights for managing regional risks induced by PM10 and PM2.5 in South Korea.

• Asian-Australasian Journal of Animal Sciences
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• 제11권3호
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• pp.293-299
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• 1998

This study was undertaken to measure the concentrations of estradiol-$17{\beta}$, progesterone and testosterone, and to study their relationship with each other and with follicular size in individual buffalo ovarian follicles categorized as small (4 to 5 mm diameter), medium (6 to 9 mm diameter) and large (${\geq}10mm$ diameter). Steroid hormone concentrations varied markedly within follicles of each size category. Estradiol-$17{\beta}$ concentrations (pmol/ml) were positively related to follicular diameter (R = 0.34, n = 308, p < 0.001) and were significantly higher (p < 0.001) in large (1$118.46{\pm}30.25$), compared to those in medium follicles ($50.32{\pm}8.29$) which, in turn were significantly higher (p < 0.001) than those in small follicles ($19.70{\pm}$5.57). Progesterone and testosterone concentrations (pmol/ml) were not related to follicular diameter and were not different among small ($330.99{\pm}27.32$ and $17.68{\pm}2.44$ respectively), medium ($384.84{\pm}26.20$ and $36.47{\pm}4.55$, respectively) and large follicles ($253.25{\pm}32.23$ and $22.57{\pm}4.48$, respectively). Estradiol-$17{\beta}$ and progesterone concentrations were positively related (R = 0.39, n = 47, p < 0.01) in small, unrelated in medium and negatively related in large follicles (R = -0.59, n = 23, p < 0.01). There was no relationship between estradiol-$17{\beta}$ and testosterone concentrations in follicles of all the three size categories. Progesterone and testosterone concentrations were positively related in large follicles (R = 0.57, n = 18, p < 0.02). There was no relationship between the two hormones in small and medium sized follicles. When the follicles with estradiol-$17{\beta}$/progesterone molar ratios of > 1.00 were considered non-atretic, and the rest at different stages of atresia, 197/208(95%) follicles were found to be atretic.

• Journal of Korean Academy of Fundamentals of Nursing
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• 제14권4호
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• pp.507-514
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• 2007

Purpose: The purpose of this study was to identify the effects of husband and wife compatibility and self efficacy on health promotion behavior and define the main factors influencing health promotion behavior in middle aged women. Method: Using a structured questionnaire, data were collected from 311 middle aged women. Descriptive statistics, Pearson correlation coefficient, Stepwise multiple regression with SAS package were used for data analysis. Results: The mean score of husband and wife compatibility was 3.55(${\pm}.56$), self efficacy was 3.51(${\pm}.54$), and total health promotion behavior was 2.91(${\pm}.37$), with scores for subcategories as follows: interpersonal support 2.86(${\pm}.59$), self-actualization 2.74(${\pm}.56$), nutrition 2.56(${\pm}.63$), health responsibility 2.32(${\pm}.60$), stress management 2.28(${\pm}.51$), and exercise 1.87(${\pm}.74$). Husband and wife compatibility, and self efficacy were positively related to health promotion behavior and all subcategories of health promotion behavior. Also husband and wife compatibility were positively related to self efficacy. The major factors that affect health. promotion behavior in middle aged women were husband and wife compatibility, self efficacy, economic level, and religion, which explained 32.6% of health promotion behavior. Conclusion: The results indicate that health promotion behavior may be increased through interventions directed at improving the husband and wife compatibility.

• Journal of the Korea Convergence Society
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• 제8권5호
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• pp.161-167
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• 2017

We have fabricated and characterized $32{\times}32$ photonic quantum ring (PQR) laser arrays uniformly operable with $0.98{\mu}A$ per ring at room temperature. The typical threshold current, threshold current density, and threshold voltage are 20 mA, $0.068A/cm^2$, and 1.38 V. The top surface emitting PQR array contains GaAs multiquantum well active regions and exhibits uniform characteristics for a chip of $1.65{\times}1.65mm^2$. The peak power wavelength is $858.8{\pm}0.35nm$, the relative intensity is $0.3{\pm}0.2$, and the linewidth is $0.2{\pm}0.07nm$. We also report the wavelength division multiplexing system experiment using angle-dependent blue shift characteristics of this laser array. This photonic quantum ring laser has angle-dependent multiple-wavelength radial emission characteristics over about 10 nm tuning range generated from array devices. The array exhibits a free space detection as far as 6 m with a function of the distance.

• Journal of the Korean Society of Food Science and Nutrition
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• 제43권7호
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• pp.1088-1094
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• 2014

This study investigated the quality properties of glutinous rice Gochujang produced by regional rural families in order to determine the present state of quality of traditional Gochujang. A total of 80 Gochujang samples were collected from nationwide rural families and their physicochemical characteristics were analyzed. Based on regional mean, ranges of moisture contents, pH, acidity, crude protein contents, and salinity of Gochujang were $44.31{\pm}5.73%{\sim}50.50{\pm}5.65%$, $4.59{\pm}0.36{\sim}4.79{\pm}0.15$, $1.18{\pm}0.22%{\sim}1.54{\pm}0.36%$, $5.28{\pm}0.90%{\sim}6.93{\pm}.09%$, and $5.55{\pm}0.85%{\sim}8.29{\pm}1.19%$, respectively. The mean contents of amino type N, reducing sugars, and capsaicinoids were $488.81{\pm}79.74mg%{\sim}715.16{\pm}78.09mg%$, $22.32{\pm}9.43%{\sim}28.61{\pm}8.80%$, and $44.31{\pm}18.71mg/kg{\sim}65.15{\pm}47.98mg/kg$, respectively, and differences were significant among the Gochujang samples. Hunter color values (L, a, and b) of Gochujang were $4.84{\pm}3.08$, $21.26{\pm}10.53$, and $8.20{\pm}5.91$, respectively, and the range of viscosity was $31,511{\pm}11,764{\sim}72,923{\pm}32,555$ cP. The acidity, salinity, moisture, crude protein, and amino type N contents of Gochujang produced from the Gangwon-do and Gyeonggi-do areas were significantly higher than those of other regions. According to principal component analysis of the physicochemical characteristics of Gochujang produced by rural families, the salinity, acidity, moisture, crude protein, and amino type N contents were strong characteristics of Gochujang produced by Gangwon-do and Gyeonggi-do. These results indicate that traditional Gochujang produced by rural families shows various quality properties and regional differences in physicochemical characteristics.