• Journal of Nutrition and Health
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• 제14권4호
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• pp.162-174
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• 1981

Fiftysix male weanling rats of the Sprague-Dawley strain weighing $52.6{\pm} 0.9g$ were fed with 77% starch-15% casein diet by ad libitum for four days to get them adapted and divided into eight groups. For three weeks, the body weight gain of rats was controlled in three different ranges. After the period of food restriction, the rats were recovered by being fed by ad libitum for seventeen days. During the experimental period, the amount of food intake and body weight were measured. And the experimental groups were compared when they reached at the same age and at the same body weight. Anterior Tibialis, Extensor Digitorum Longus, Soleus, Plantaris, Gastrocnemius were used as analytic items of skeletal muscle. Wet weight of muscle, muscle protein, water content were measured from each of five skeletal muscles. Sodium, potassium, magnesium content were measured from Anterior Tibialis, Extensor Digitorum Longus, Soleus ana Plantaris. Phosphorus was measured only from Gastrocnemius. The whole carcass protein except the skeletal muscles was also measured. During the period of food restriction, food intake was $311.7{\pm}19.5g$ for the control group. $130.2{\pm}1.5g$ for the second group and $161.7{\pm}2.1g$ for the third group. During the period of food restriction, body weight gain was $106.8{\pm}12.7g$ for the control group, $3.6{\pm}2.1g$ for the second group and $18.9{\pm}3.3g$ for the third group. Comparing the body weight when they reached at the age 66 days, the control group showed higher value than the other groups. In the concentration of electrolytes of skeletal muscles sodium and magnesium tend to increase and potassium and phosphorus tend to decrease by food restriction. But after their recovery, there was no significant difference between the groups. By the degree of food restriction, there was time difference in reaching at the same body weight. But when they reached at the same body weight, there was no significant difference in the value of electrolytes concentration. Regarding all the results of this study, the ages of rats which reached the same body weight were different by food restriction level during weanling. Once food·restricted rats reached the same body weight by recovery, the concentration of electrolytes and protein tend to become almost the same.

• 한국철학논집
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• 제23호
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• pp.181-216
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• 2008

이 글에서는 민이승(閔以升) 사상 가운데 주로 1)지와 지각의 문제, 즉 심성(心性)의 구분에 관한 논의문제, 이와 관련하여 펼쳐진 2)정제두와의 양지 지각의 동이성 문제에 관한 논의 등으로 나누어 살펴본다. 민이승은 양명학자 정제두와 양명학의 시비문제를 둘러싸고 논쟁을 전개하고 있는데, 그 내용은 양명학의 중심개념인 양지와 지각의 동이문제이다. 또한 민이승은 양지와 지각 논쟁의 연장선상에서 김창협과 지(智)와 지각(知覺)의 동이문제를 둘러싸고 논쟁한다. 민이승은 정제두와의 양명학 논쟁에서 양명학의 '심즉리'설과 '지행합일'설에 대해 부정하고 있으며, 양명학의 중심개념인 양지는 천리와는 구분된 지각으로 파악하고 있다. 정제두와 양지와 지각의 관계에 대해 논쟁하고 있는 민이승은 당시 학계에서 진행되고 있었던 지와 지각의 관계에 관심을 가지게 된다. 이 결과, 민이승은 김창협과 지와 지각의 동이문제에 대해 한차례 논쟁을 벌이게 된다. 민이승과 김창협 사이에 전개된 지와 지각의 관계에 대한 논의는 지와 지각의 관계를 불상잡(不相雜)의 측면에서 보느냐 아니면 불상치의 측면에서 보느냐 하는 차이점에 있다. 김창협은 지와 지각이 서로 섞일 수 없다는 불상잡의 입장을 강조하는 데 비해, 민이승은 지와 지각의 관계를 불상리의 입장에서 양자의 연관성에 주목하고 있다. '양지와 지각의 동이문제', '지와 지각의 동이문제'라는 논쟁 주제를 중심으로 양자의 입장 차이를 살펴보고, 이러한 논쟁이 사상사적으로 어떠한 의의가 있는가 살펴보기로 한다.

• Korean Journal of Radiology
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• 제22권2호
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• pp.281-290
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• 2021

Objective: To assess the performance of content-based image retrieval (CBIR) of chest CT for diffuse interstitial lung disease (DILD). Materials and Methods: The database was comprised by 246 pairs of chest CTs (initial and follow-up CTs within two years) from 246 patients with usual interstitial pneumonia (UIP, n = 100), nonspecific interstitial pneumonia (NSIP, n = 101), and cryptogenic organic pneumonia (COP, n = 45). Sixty cases (30-UIP, 20-NSIP, and 10-COP) were selected as the queries. The CBIR retrieved five similar CTs as a query from the database by comparing six image patterns (honeycombing, reticular opacity, emphysema, ground-glass opacity, consolidation and normal lung) of DILD, which were automatically quantified and classified by a convolutional neural network. We assessed the rates of retrieving the same pairs of query CTs, and the number of CTs with the same disease class as query CTs in top 1-5 retrievals. Chest radiologists evaluated the similarity between retrieved CTs and queries using a 5-scale grading system (5-almost identical; 4-same disease; 3-likelihood of same disease is half; 2-likely different; and 1-different disease). Results: The rate of retrieving the same pairs of query CTs in top 1 retrieval was 61.7% (37/60) and in top 1-5 retrievals was 81.7% (49/60). The CBIR retrieved the same pairs of query CTs more in UIP compared to NSIP and COP (p = 0.008 and 0.002). On average, it retrieved 4.17 of five similar CTs from the same disease class. Radiologists rated 71.3% to 73.0% of the retrieved CTs with a similarity score of 4 or 5. Conclusion: The proposed CBIR system showed good performance for retrieving chest CTs showing similar patterns for DILD.

• 대한기계학회논문집A
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• 제37권2호
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• pp.193-198
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• 2013

제품은 하나 이상의 부품으로 구성되어 있으며, 제품을 구성하는 부품들은 같은 기능을 갖는 경우도 있다. 부품통합설계 가설에 의하면 같은 기능을 하는 부품은 하나의 부품으로 통합될 수 있다. 제품을 구성하는 부품은 하나 이상의 기능을 가지고 있는 경우가 있으며, 부품의 형상 자체가 기능이 되거나 부품의 재질이 갖는 특성이 기능이 되기도 한다. 본 논문에서는 부품이 가지고 있는 기능을 정의하는 방법을 제시하고, 제시된 방법에 의하여 확인된 부품의 기능들 중에서 동일 기능을 갖는 부품을 통합하는 방법을 제시하였다. 또한 제시된 방법을 이용하여 종이에 구멍을 뚫는 3 공 천공기를 구성하는 부품들을 통합해 보았으며 그 결과는 공리적 설계를 만족하였다.

• Carbon letters
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• 제24권
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• pp.41-46
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• 2017

The microstructure, flexural properties, electrical conductivity, thermal conductivity and electromagnetic interference (EMI) shielding effectiveness (SE) of epoxy composites filled with multi-walled carbon nanotubes (CNTs), exfoliated graphite nanoplatelets (xGnPs) and CNT-xGnP hybrid filler were investigated. The EMI SE of the CNT-xGnP hybrid composite was higher than 25 dB at 100 MHz while that of the xGnP based composite was almost zero. The flexural modulus of the CNT-xGnP based epoxy composite continuously increased to 3.32 GPa with combined filler content up to 10 wt% while that of the CNT based epoxy composites slightly decreased to 1.96 GPa at 4 wt% CNT, and dropped to 1.57 GPa at 5 wt% loading, which is lower than that of epoxy. The CNT and CNT-xGnP samples had the same EMI SE at the same surface resistivity, because samples with the same surface conductivity have the same amount of the charge carriers.

• 한국전산유체공학회지
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• 제15권1호
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• pp.1-8
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• 2010

RCCS is a passive safety-related system that removes the decay heat of VHTR when normal decay heat removal systems are in failure. Understanding thermo-hydraulics of RCCS is important to design a safer VHTR. RCCS consists of 292 cooling panels, which are placed in the reactor cavity. The layout of RCCS gives an idea that, for CFD simulations, cooling panels can be assumed to be one annulus tube. This assumption can reduce significantly the computational time, especially for the unsteady simulation. To simulate RCCS in an axisymmetric manner, three models were suggested and compared. Each model has (1) the same outer radius, (2) the same cross-sectional area (3) the same pressure drop, respectively, as the RCCS cooling panels. The steady-state simulation was conducted with these three models and the DO radiation model. It is found that over 90% of the heat from the outer wall of the reactor pressure vessel is transported to the RCCS by radiative heat transfer. The simulation with the third model, which has the same pressure drop as the design, estimates the closest wall temperature profiles to a thermo-hydraulic code, GAMMA+, result.

• 한국연초학회지
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• 제37권1호
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• pp.1-7
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• 2015

The purpose of this study was to establish the origin of Korea tobacco, by homogeneity of the names and folk tales for the tobaccos introduced among three countries. According to the literatures that had written the origin concerning tobacco during the survival period of the Korean author, Korea tobacco came from Japan, for the first time, in 1611~1612. Six year s after the tobacco was introduced, in 1617~1618, tobacco seed also came from Japan. And 10 year safter the tobacco was introduced, in 1621~1622, there was no person that do not smoke. The Korea tobacco name, Dambago(淡婆姑), was the same as Japan tobacco name, Dambago(淡婆姑), but it was not the same as China tobacco name, Tambaku(淡巴菰). The Korea tobacco's folk tale, Dambago(淡婆姑) story, was the same as Japan tobacco's folk tale, Dambago(淡婆姑) story, but it was not the same as China tobacco's folk tale, Tambaku(淡巴菰) or Banhonhyang(返魂香) stories. This finding suggests that Korea tobacco may surely came from Japan, considering homogeneities of the names and the folk tales in the tobaccos introduced among three countries.

• Restorative Dentistry and Endodontics
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• 제13권1호
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• pp.173-178
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• 1988

The purpose of the study was to confirm the influence of fluoride to enamel decalcification. Specimens were prepared from 20 extracted teeth. Every tooth was sliced into 4 pieces by means of seperating disc. The pieces with sound enamel were distributed to 4 groups. 1st group was treated with 0.5% NaF solution for 2 minutes. 2nd group was treated with 0.5% NaF solution for 10 minutes. 3rd group was treated with 1% NaF solution for 2 minutes. 4th group was treated with 1% NaP solution for 10 minutes. The enamel surface of each specimen were decalcified with 30% $H_3PO_4$ for 2 minutes and the findings through electron microscope were as follows; 1. The degree of decalcification on the 1st group was greater than that of the 2nd group. 2. Roughness of the 3rd group was slightly higher than that of the 4th group. 3. Under the same procedure of decalcification, the specimen treated by higher conceutration of NaF solution for same length of time showed less decalcified picture. 4. Under the same procedure, of decalcification, the specimens treated by same concentration of NaF solution for different length of time, were compared and found longer the time less decalcified.

• 말소리와 음성과학
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• 제3권2호
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• pp.11-22
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• 2011

The purpose of this study is to find the influence of Chinese falling-rising tone on the pitch pattern of corresponding Sino-Korean words delivered by Chinese learners of Korean and to examine how the falling-rising tone of corresponding Chinese words affect the pitch patterns of Sino-Korean words. The scope of this research is limited to Chinese learners of Korean, especially when they pronounce same-form-same-meaning Sino-Korean words. In this study, Chinese learners pronounced both Chinese words and corresponding Sino-Korean words. Learners' pitch patterns were recorded and analyzed using software and compared with the tone of corresponding Chinese words. Experimental results showed that Sino-Korean words were affected by Chinese 'falling-rising tone - high and level tone' when they started with lenis sounds. On the other hand, when Sino-Korean words started with aspirated sounds they were affected by Chinese 'falling-rising tone - high and level tone', 'falling-rising tone - falling-rising tone', and 'falling-rising tone - falling tone'. In conclusion, the Chinese learners' pitch patterns of Sino-Korean words are affected by Chinese falling-rising tone, especially when Sino-Korean words start with aspirated sounds.

• 미생물학회지
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• 제6권1호
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• pp.6-11
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• 1968

Through the present experiment the various Aspergilli have been isolated from 53 Meju specimens (fermented soy bean cake) which were collected from 43 local areas in Korea and those of them are arranged as 6 different groups: Asp. flavus-oryzae group (38 strains), Asp. niger group (11 strains) Asp. nidulans group (5 strains), Asp. clavatus group (4 strains), Asp. fumigatus group (3 strains), and Asp. ochraceus group (2 strains), as the result of identification of them by the group key of Thom and Raper. Further identifications of them according to the species keys of Thom and Raper, Yamata and Sakakuchi have been also conducted and the results obtained are following as: 1. Group members (38) of Asp. flavus-oryzae group are identified as. Asp. oryzae, Asp. oryzae var. fulvus, Asp. flavus. and Asp. parasiticus, not identified two different strains belong to this group. 2. Group members (11) of Asp. niger group are identified as Asp. niger and Asp. phoenicus. 3. Group members (5) of Asp. nidulans groups are identified as the same species, Asp. nidulans. 4. Group members (4) of Asp. clavatus group are identified as the same species, Asp. clavatits. 5. Group members (3) of Asp. fumigatus group are identified as the same species, Asp. fumigatus. 6. Group members (2) of Asp. ochraceits group are identified as the same species, Asp. sulphereus.