• 한국진공학회지
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• 제2권4호
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• pp.491-500
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• 1993

The adsorption of nitrogen (77K) and carbon dioxide(273K) was performed on a series of activated carbon fiber. Theadsorption iotherm of nitrogen was typical type 1 and that of carbon dioxide was convex. As the specific surface area increases, there are linear increases in BET constant C mean pore diameter, the width of pore size distribution, wide micropore volume, total micropore volume, total pore volume and external surface area, however, narrow micropore volume was nealy constant . The total micorpore volume fraction in total pore volume is above 97%.

• Journal of Forest and Environmental Science
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• 제34권4호
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• pp.313-320
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• 2018

Tectona grandis (teak) is one of the most important timber species worldwide and India is one of the major teak growing countries. Though some volume equations were developed for teak in India but the models developed were neither evaluated using robust statistical criteria nor validated. Hence, the objective of this study was to develop statistically tested appropriate volume equation to predict total wood volume (over- and under-bark) for teak trees in Gujarat. A total of 41 trees with age varying from 15 to 33 years and diameter at breast height (dbh) from 7.3 to 30.8 cm were felled for the purpose. Linear and non-linear equations were used to model the relationship of the total wood volume with respect to dbh and total height. The equations tested mostly fitted well to the data. Model evaluation and validation indicated that models should be calibrated with local data for greater accuracy in the prediction.

• Archives of Plastic Surgery
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• 제47권1호
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• pp.33-41
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• 2020

Background Closed-suction drains are widely used in expander-based breast reconstruction. These drains are typically removed using a volume-based criterion. The drainage volume affects the hospital stay length and the recovery time. However, few studies have analyzed the factors that influence drainage volume after expander-based breast reconstruction. Methods We retrospectively analyzed data regarding daily drainage from patients who underwent expander-based breast reconstruction between April 2014 and January 2018 (159 patients, 176 expanders). Patient and operative factors were analyzed regarding their influence on total drainage volume and drain placement duration using univariate and multivariate analyses and analysis of variance. Results The mean total drainage volume was 1,210.77±611.44 mL. Univariate analysis showed correlations between total drainage volume and age (B=19.825, P<0.001), body weight (B=17.758, P<0.001), body mass index (B=51.817, P<0.001), and specimen weight (B=1.590, P<0.001). Diabetes history (P<0.001), expander type (P<0.001), and the surgical instrument used (P<0.001) also strongly influenced total drainage. The acellular dermal matrix type used did not affect total drainage (P=0.626). In the multivariate analysis, age (B=11.907, P=0.004), specimen weight (B=0.927, P<0.001), and expander type (B=593.728, P<0.001) were significant predictors of total drainage. Conclusions Our findings suggest that the total drainage and the duration of drain placement needed after expander-based breast reconstruction can be predicted using preoperative and intraoperative data. Patient age, specimen weight, and expander type are important predictors of drainage volume. Older patients, heavier specimens, and use of the Mentor rather than the Allergan expander corresponded to a greater total drainage volume and a longer duration of drain placement.

• 한국환경과학회지
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• 제7권3호
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• pp.311-320
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• 1998

The volume transport and turnover time of the Deukryang Bay. located at the southern area of Korea, were calculated based on the current meter(RCM-7,ACM 16M) data observed at the three gateways of the tegrating observed data and then averaging on time. dangdo and Kogumdo. The total water volume transports through three entrances of the bay in May and October were $3.9{\times}10-2Sv, 3.4{\times}10^{-2}Sv(1Sv=10^6m^3s^{-1}$) and turnover time were 0.97day, 1.12day, respectively. Semidiurnal tides were predominant (70~85%). The water volume transports by residual currents were 2~4% of total water volume transports . The average fraction of fresh water calculated by tidal prism method using salinity difference between inflow current and outflow current through three entrances In Deukryang Bay was about 0.06% of total volume and the flushing time of fresh water was estimated as 0.97day.

• 한국산림과학회지
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• 제96권2호
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• pp.189-196
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• 2007

Allometry, basal area equations, and volume equations were developed with various tree measurement variables for the major species, Quercus mongolica and Quercus variabilis, in Korean natural hardwood forests. For allometry models, the relationships between total height-DBH, crown width-DBH, height to the widest portion of the crown-total height, and height to base of crown-total height were investigated. Multiple regression methods were used to relate annual basal area growth to tree variables of initial size (DBH, total height, crown width) and relative size (relative diameter, relative height) as well as competition measures (competition index, crown class, exposed crown area, percent exposed crown area, live crown ratio). For tree volume equations, the combined-variable and Schumacher models were fitted with DBH, total height and crown width for both species.

• 한국임상수의학회지
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• 제28권5호
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• pp.510-515
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• 2011

개에서 컴퓨터단층촬영술을 이용하여, 촬영 자세에 따른 정상 폐의 용적과 밀도를 정량적으로 평가하였다. 각각 6 마리의 페키니즈견과 말티즈견에서 컴퓨터단층촬영을 실시하면서 자세를 앙와위, 좌측과 우측 횡와위, 그리고 흉와위로 변경하였다. 컴퓨터단층촬영을 실시하는 동안 일정한 정도의 양압환기를 실시하였다. 폐용적과 밀도는 CT 영상의 삼차원 재구성 방식을 통해 측정하였고, 전체 폐용적 및 밀도, 좌측과 우측 폐의 용적과 밀도를 각각 측정하였다. 삼차원 재구성 결과 폐의 모양은 두 품종견에서 매우 다르게 나타났다. 폐용적과 밀도는 촬영 자세를 변경하는 동안 두 품종견에서 모두 유의적인 변화를 보이지 않았다. 오른쪽 폐용적이 왼쪽 폐에 비해 유의적으로 약 $66.91{\pm}25.1$ ml 만큼 컸다. 페키니즈 견과 말티즈 견의 체중 차이가 유의적이었으며, 체중과 흉와위로 촬영한 폐용적 간에 선형관계가 관찰되었다. 좌우측 횡와위 촬영에서 중력의 영향을 받는 쪽의 폐는 반대쪽 폐에 비해 밀도는 높고 용적은 감소되었다. 컴퓨터단층촬영으로 측정한 전체 폐용적은 폐밀도와 관련이 있었으며, 폐밀도가 정상 폐용적을 유추하는데 유용하게 사용될 것으로 생각된다.

• 한국응용과학기술학회지
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• 제23권2호
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• pp.130-136
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• 2006

Theoretical total nitrogen removal efficiency and reactor volume ratio in oxic-anoxic-oxic system can be found by influent water quality in this study. The influent water quality items for calculation were ammonia, nitrite, nitrate, alkalinity, and COD which can affect nitrification and denitrification reaction. Total nitrogen removal efficiency depends on influent allocation ratio. The total nitrogen removal follows the equation of 1/(1+b). Optimal reactor volume ratio for maximum TN removal efficiency was expressed by those influent water quality and nitrification/denitrification rate constants. It was possible to expect optimal reactor volume ratio by the calculation with the standard deviation of ${\pm}14.2$.

• 사상체질의학회지
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• 제3권1호
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• pp.201-217
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• 1991

In order to investigate experimental effects of Yangkyuksanwha-Tang, which is the typical prescription for diseased SOYANGIN, on diabetes rats, the observation and measurement was made on the content of volume of blood glucose, total cholesterol, triglyceride, phospholipid, total protein, electrolyte($K^+$, $Na^+$) in serum, by dosing the cooked Y.S.T. to diabetic rats, induced by streptozotocin and following result was obtained. 1. The volume of blood glucose, in the diabetes rats, was decreased significantly, and remarkable decrease of blood glucose was shown in the Y.S.T. (12.5ml/kg) dosed group, after 4weeks of experiment. 2. The volume of total cholesterol of blood serum was decreased notably, especially remarkable reduce of total cholesterol was shown in the Y.S.T. (12.5ml/kg) dosed group after a week. 3. The volume of triglyceride in the blood serum of diabetic rats, induced by the streptozotocin was decreased after 4 weeks, and remarkable decrease was shown in the Y.S.T. (12.5ml/kg) dosed group after 2 weeks of experiment. 4. The volume of the phospholipid in the diabetes rats, was decreased significantly in the Y.S.T. (12.5ml/kg) dosed group after 2 weeks of experiment. 5. The volume of total protein of diabetes rats, was increased in all group, and the remarkable increase was shown in the Y.S.T. (12.5ml/kg) dosed group after 4 weeks. 6. The volume of the sodium in the Y.S.T. (12.5ml/kg) dosed group, was notable in each Y.S.T. dosed group (1.25ml/kg, 12.5ml/kg) after a week experiment. According to above results, It is expected that Y.S.T. applied to SOYANGIN, can be used for medical treatment of diabetes with effect. But because the effect can be somewhat different depending upon dosage, appropriate operation on clinic is needed, for the best curing effect.

• 대한교통학회지
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• 제34권5호
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• pp.449-464
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• 2016

본 연구의 목적은 혼잡 교차로에 직결형 회전교차로의 적용 가능성을 평가하고 적용 가능한 교통량 범위를 산정하여 도입기준을 마련하는데 있다. 이를 위해 진입 교통량 및 주 부도로 교통량 비율, 좌회전 교통량 비율에 따라 다양한 시나리오를 작성하고 직결형 회전교차로와 회전교차로, 신호교차로에 대한 시뮬레이션을 수행하여 지체시간을 비교 분석하였다. 분석 결과 주 부도로 교통량 비율이 6:4인 경우의 차로당 교통량이 400대/시에서는 좌회전 비율 30%까지, 500대/시에서는 20%까지, 600대/시에서는 10%까지 직결형 회전교차로의 지체시간이 가장 작게 나타났다. 주 부도로 비율이 7:3인 경우에는 차로당 교통량이 400-600대/시에는 6:4와 동일하게 나타났으나 300대/시의 좌회전 비율 30%, 700대/시인 경우의 10%에서 직결형 회전교차로가 가장 작게 나타났다. 주 부도로 비율 8:2인 경우에는 차로당 교통량이 400-500대/시, 700대/시인 경우에는 7:3과 동일하게 나타났으나 300대/시의 10-30%, 600대/시에는 좌회전 비율이 20% 인 경우에도 가장 작게 나타났다. 종합해보면 주 부도로의 교통량 비율 차이가 커질수록 좌회전 교통량 비율과 교통량이 적을수록 직결형 회전교차로의 교통 처리 능력이 높게 나타났다. 따라서 주 부도로 교통량 차이가 크고 주도로 직진교통량 비율이 큰 혼잡교차로에 직결형 회전교차로의 도입 시 효과가 클 것으로 기대된다.

• Environmental Analysis Health and Toxicology
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• 제14권1_2호
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• pp.45-54
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• 1999

Quantitative strucrure-activity relationships between the toxicity (LD$\_$50/) and molecular properties of amine and nitro compounds were tested. The all 19 compounds showed low correlations below 0.500 to their LD$\_$50/ values. When amine or nitro compounds were taken separately, the correlation between the calculated chemphysico parameters and LD$\_$50/ were also poor (r$^2$=0.4911, 3967 repectively). The overall relationships among the QSAR parameters were investigated. Molecular weight shows a high correlation with total surface area (r$^2$=0.9287); 0.9090 for zero-order connectivity and second-order connectivity : 0.8784 for bioconcentration factor and second-order connectivity. When amine compounds were taken to perform the statistical treatment, the relationships between parameters were as follows: 0.8436 for volume-negentropy; 0.8925 for volume-bioconcentration factor; 0.9929 for zero-order connectivity-Kow; zero-order connectivity-bioconcentration factor; 0.9141 for zero-order connectivity-solubility; 0.9718 for solubility-bioconcentration factor; 0.9894 for solubility-bioconcentration factor and 0.9319 for Kow-bioconcentration factor. On the other hand, nitro compounds showed different relationships as follows: 0.8952 for volume-I/O character; 0.9520 for volume-total surface area: 0.9351 for volume-molecular weight; 0.9351 for volume-MW; 0.9961 for Kow-Koc; 0.8455 for Kow-bioconcentration factor; 0.8879 for Koc-bioconcentration factor; 0.9987 for MW-total surface area respectively.