• Journal of Environmental Health Sciences
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• v.31 no.1
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• pp.94-98
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• 2005

This study was carried out to provide radon concentration and exposure in building. The average radon concentrations of building was measured 1.37 pCi/L in basement, 0.95 pCi/L in 1st layer, 0.74 pCi/L in 2nd layer, 0.56 pCi/L in 3rd layer, and 0.4 pCi/L in 4th layer, respectively. The average radon concentration of basement was measured the higher than any other stairs. Daily average distribution of radon concentrations in building shown that radon concentrations measured in morning at 8hr was the highest value. Monthly average distribution of radon concentrations shown 0.28 ${\pm}$ 0.17 pCi/L in April and 0.82 pCi/L in December that was the highest value. The average concentrations of radon was measured 0.38pCi/L in spring. 0.44 pCi/L in summer, 0.53 pCi/L in autumn, and 0.67 pCi/L in winter, respectively. This result shown that the average concentrations of radon in winter was the higher than any other seasons. That reasons was supposed that effect of number of exchanges and using air conditions was the higher in summer than winter.

• Journal of Ocean Engineering and Technology
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• v.19 no.2 s.63
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• pp.53-59
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• 2005

The effect of pH on the corrosion characteristics in the dissimilar friction welded zone of IN713LC-SCM440 in the loaded torsional stress was studied. The corrosion experiment was performed for 120 hours on the specimens with five steps of pH. The surface corrosion pattern of the SCM440 area showed global corrosion and narrow pitting, which was caused by galvanic corrosion between friction welded IN713LC and SCM440, but corrosion did not proceeded from the IN713LC area. The average relative electrode potential gradually tends to decrease with the elapse of the immersion time in the acidity area. The average corrosion current also gradually tend to decrease The corrosion rate showed a larger value when the average relative electrode potential was higher and the average relative current was lower. The corrosion rate showed a larger value when the average relative electrode potential was higher in the acidity area, and it showed large when the average relative electrode potential was lower in the alkalinity area.

• Food Science and Preservation
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• v.10 no.1
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• pp.54-59
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• 2003

To get basic data for quality grading of Mandarin oranges, the oranges were collected from five major areas distributed in Cheju Island, Korea for 3 years and the quality characteristics such as greenness, size, weight, uniformity, sweetness, pH and titratable acidity and its distributions were analyzed. The mean value of greenness (100- yellowness) of peel color in Mandarin oranges was 2.58% and its variation was very large, 9.04%. The average height and diameter of the oranges were 47.51 mm and 56.05 mm, respectively. The average weight was 82.24 g and its variation was 29.92g. The sweetness varied between 5.60$^{\circ}$Brix and 17.2$^{\circ}$Brix and its average value was 10.53$^{\circ}$Brix. The average values of the pH and total acidity of the oranges were 3.90 and 0.71 ％, individually. In quality characteristics of Mandarin oranges according to the cultivated areas, area D had the lowest value in the strength of greenness, 1.14% and area D had the highest value, 3.53%. The highest values of the height and diameter in Mandarin oranges were 49.35mm and 57.48mm for area A and the lowest values of them were 46.35mm and 54.87mm for area E, respectively. The highest value of the weight in Mandarin oranges was 87.61 g for area A and the lowest value was 76.77g fer area E. Although the sweetness ranged from 10.2$^{\circ}$Brix for area E to 10.75$^{\circ}$Brix for area D, the difference by the areas was insignificant. For pH values, area B had the highest value, 3.96, while area E showed the lowest value, 3.78. Area A and E in titratable acidity were the areas shown the highest value, 0.75%, whereas area B marked the lowest value, 0.64%.

• Journal of Family Relations
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• v.22 no.4
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• pp.31-52
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• 2018

Objectives: The purpose of this study is to examine whether the maternal and paternal value of children mediates the relationship between the marital relationship satisfaction and the parental sense of competence in the longitudinal dyadic approach. Method: The data were obtained from the Panel Study on Korean Children (PSKC) conducted by the Korea Institute of Child Care and Education. Using the Actor-Partner Interdependence Model（APIM), the author analyzed three waves (from 5th to 7th year) of the data, and the sample size was 1,773. The average age was 34.79 for mothers, and 37.26 for fathers. Their average length of marriage was 95.3 months, and their children were 51.03 months old on average. Results: The marital relationship satisfaction influenced the parental sense of competence with both the actor effect and the partner effect of mothers and fathers. The marital relationship satisfaction also influenced the value of children, with the actor effect from both mothers and fathers and with the partner effect only from mothers. The value of children influenced the parental sense of competence with the actor effect only from mothers and fathers. Also, the value of children mediated the relationship between the marital relationship satisfaction and the parental sense of competence with the actor effect from both mothers and fathers. For the partner effect, only the mediation path from fathers' marital relationship satisfaction to mothers' value of children to mothers' parental sense of competence was significant. Conclusions: These results suggest the importance of highlighting the marital relationship satisfaction and the value of children to improve the parental sense of competence.

• Proceedings of the IEEK Conference
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• 2000.11a
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• pp.287-290
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• 2000

This paper analyze link-sharing mechanisms in packet networks based on the hierarchical class based queueing. The CBQ outlines a set of flexible, efficiently implemented gateway mechanisms that can meet a range of service and link-sharing requirements. We have analyzed the Class level(B, C, D) using the EWMA (Exponential Weighted Moving Average) weight value and EWMA average limit value.

• The Korean Journal of Malacology
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• v.32 no.4
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• pp.255-261
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• 2016

The selected seven oligonucleotides primers BION-32, BION-33, BION-35, BION-38, BION-40, BION-46 and BION-58 generated the shared loci, specific loci, unique shared loci to each population and shared loci by the three T. granosa populations in Beolgyo, a Chinese site and Wonsan, respectively. The bandsharing value between individuals' no. 03 and no. 04 was 0.816, which was the highest value identified within the Beolgyo population. The primer BION-35 generated the most loci (a total of 70), with an average of 10.0 in the Wonsan population. On average, seven oligonucleotides primers generated 16.1 specific loci in the Beolgyo population, 22.3 in the Chinese population and 39.3 in the Wonsan population. 126 unique shared loci to each population, with an average of 18 per primer, were observed in the Beolgyo population, 63 loci, with an average of 9 per primer, were observed in the Chinese population, and 49 loci, with an average of 7 per primer, and were observed in the Wonsan population. The oligonucleotides primer BION-32 generated 14 unique loci to each population, which were identifying each population in the Beolgyo population. Interestingly, every primer had not distinguished the shared loci by the three populations, major and/or minor fragments of sizes, which were identical in almost all of the samples. As regards average bandsharing value (BS) results, individuals from Beolgyo population ($0.717{\pm}0.057$) exhibited higher BS values than did those from Wonsan population ($0.552{\pm}0.104$) (P < 0.05). The dendrogram resulted from truthful seven oligonucleotides primers, representing three genetic clusters comprising group I (BEOLGYO 01, 02, 03, 04, 05, 06 and 07), group II (CHINESE 08, 09, 10, 11, 12, 13 and 14) and group III (WONSAN 15, 16, 17, 18, 19, 20 and 21). In three T. granosa populations, the longest genetic distance (0.874) displaying significant molecular difference was also between individual no. 02 within the Beolgyo population and individual no. 12 within the Chinese population. Relatively, individuals of the CHINESE population were fairly closely related to those of the WONSAN population.

• Journal of Korean society of Dental Hygiene
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• v.14 no.5
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• pp.765-773
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• 2014

Objectives : The objective of study is to investigate the relationship between the satisfaction of dental service, value quality, and reuse intention among dental implant patients. Methods : A self-reported questionnaire was filled out by 316 dental implant patients in 4 dental clinics in Daejeon from December, 2013 to March, 2014. Results : The average of dental service satisfaction was 4.14(SD=.562). The average of value satisfaction was 3.88(SD=.648), and that of reuse intention was 3.98(SD=.662). The tangibility was defined as the influence of the quality of medical service on the value satisfaction(t=4.042, p<0.001) and the confidence(t=2.997, p<0.01). The influence of the service value on the intention to reuse was 0.486(t=10.796, p<.001) of path coefficient. Conclusions : The quality of medical service is decided by the value satisfaction and the intention to reuse including the value satisfaction.

• The Journal of Fisheries Business Administration
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• v.43 no.2
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• pp.41-49
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• 2012

This study aimed to estimate the economic value of the recreational fishing in the Jeonnam marine ranching area as a part of the total socioeconomic evaluation of the Jeonnam marine ranching program. A travel cost method was applied to the estimation of economic value of the recreational fishing in the Jeonnam marine ranching area and input variables included annual fishing trip days, average travel cost per trip, average catch amount, monthly income, marriage, age, and personal perception on the marine ranching program. In the analysis, due to its characteristic of count data, both poisson model and negative binomial model were used. Model results indicated that a negative binomial model was statistically more suitable than the poisson model as the overdispersion problem occurred in the poisson model. All signs of the estimated parameters were estimated as previous studies showed. Based on the results, the economic value per trip of the recreational fishing in the Jeonnam marine ranching area was estimated to be 145,000 won and the annual total economic value of the recreational fishing in the Jeonnam marine ranching area was analyzed to be 2,514,000 won. In addition, the change of total value by catch rate showed that the economic value could be increased by 180,900 won as the catch increased by one kilogram.

• 한국태양에너지학회:학술대회논문집
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• 2011.11a
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• pp.274-277
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• 2011

We measured a solar irradiation of vertical and horizontal surface per azimuth in southern area of Korea using pyrheliometer. In comparison with the provided data from ASHRAE and CIBSE, the average amount of solar irradiation has much variation of 10 to 150% in reference with north direction. In the clear day, the measured value has much difference with the value of ASHRAE and there is similar trend in case of CIBSE. The reason why amount of irradiation of clear day is differ from the average value, is able to be assumed that the value of ASHRAE and CIRSE is made of assumption based on clear days. The result of analysis of ASHRAE and CIBSE values according to the amount irradiation value for vertical and horizontal surface per azimuth using the MBE, RSME, and t-Statistic show that the CIBSE value has more reliability for the MBE, RMSE, and t-Statistic values than ASHRAE value.

• Proceedings of the KIEE Conference
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• 2007.04a
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• pp.23-25
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• 2007

The partial distortion elimination (PDE) scheme is used to decrease the sum of absolute difference (SAD) computational complexity, since the SAD calculation has been taken much potion of the video compression. In motion estimation (ME) based on PDE, it is ideal that the initial value of SAD in summing performance has large value. The traditional scan order methods have many operation time and high operational complexity because these adopted the division or multiplication. In this paper, we introduce the new scan order and search order by using only adder. We define the average value which is called to rough average value (RAVR). Which is to reduce the computational complexity and increase the operational speed and then we can obtain the improvement of SAD performance. And also this RAVR is used to decide the search order sequence, since the difference RAVR between the current block and candidate block is small then this candidate block has high probability to suitable candidate. Thus, our proposed algorithm combines above two main concepts and suffers the improving SAD performance and the easy hardware implementation methods.