• 한국지진공학회논문집
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• 제1권2호
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• pp.31-37
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• 1997

삼국시대 이후 근대까지 민가의 가장 보편적인 형태였던 초가삼가의 평균적인 상세 구조를 제시하였다. 목조 프레임이 주로 사용되었으며 프레임의 조인트는 사개맞춤이 일반적이었다. 초가삼간을 구성하는 평주 및 고주 프레임의 정적 수평내력을 1:1 실험모델을 통하여 평가하였다. 기둥 상부 조인트의 형태 및 심벽이 수평내력에 미치는 영향과 조인트의 파괴모드를 분석하였다. 실험결과 평주 프레임의 극한 수평내력은 1,090N, 파괴시 최대 수평변위는 400mm(1/6 rad)이었다. 고주 프레임의 경우 이들 값은 각각 4,160 N 및 250 mm(1/9.6 rad)이었다. 프레임의 거동은 모두 조인트의 거동에 지배되었으며 매우 큰 비선형을 보였다. 조인트의 파괴모드는 평주 프레임의 경우 화통가지의 전단파괴, 고주프레임의 경우 화통가지의 휨파괴가 주요한 모드였다.

• 한국임상수의학회지
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• 제21권2호
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• pp.93-96
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• 2004

혈중 항원 특이적 IgE 검사와 피내시험으로 집먼지 진드기 (house dust mites, HDM)에 양성 반응을 보인 20두의 아토피성 피부염으로 진단된 개를 대상으로, 말초혈단핵구 (peripheral blood mononuclear cells, PBMC)를 채취하여 HDM항원에 대한 반응을 검토하였다. PBMC를 분리하여 HDM항원으로 자극한 결과 20두 중 13두 (65%)에서 항원 특이적이 림프구의 증식반응을 확인할 수 있었다. HDM 항원에 증식반응은 아토피성 피부염군에서 대조군에 비해 유의적으로 높은 반응이 확인되었다 (P=0.007). 또한, HDM에 대한 반응은 혈중의 IgE 농도와 유의적으로 상관관계를 나타내었으며 (P=0.035), 이는 체내에서 항원 특이적인 IgE의 생산을 촉진하는 작용을 반영하는 지표가 될 수 있다고 생각되었다. 이러한 결과로, 말초혈액중에 존재하는 HDM 항원 특이적인 림프구는 개의 아토피성 피부염의 병태생리에 관여하고 있는 것으로 시사되었다.

• 헤리티지:역사와 과학
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• 제34권
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• pp.172-195
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• 2001

This research on the house folklore in China, Korea, and Japan is focusing on a kitchen God that is common in these three countries. This god originated in China and has subsequently influenced Korea and Japan. Today, all three countries use the same name of this kitchen god which is called Youngwang(竈王) as its name has been spelled in Chinese. In China, this kitchen god has been believed in two different ways. The Han people have developed their belief in Youngwang while another creed has been originated from other ethnic groups. Because of the particular house style with upper stories of ethnic groups in the southern and southeast areas of China, a kitchen fireplace is centered in the house. Han people in China also worship painted depictions of kitchen gods. And the ethnic groups believe it has three stone legs for a fire box. These differing beliefs has bad influenced on Korea and Japan. The kitchen god of Cheju island (off the south Korea coast) is believed to be almost the same as among the ethnic groups in China Interestingly, form of belief in the kitchen god in Okinawa (off the south coast of Japan) is almost identical as in the southern area of China Custom in China. Korea, and Japan regarding the kitchen god symbolized family values healing, initiating a new daughter-in-law to reveging the kitchen god, etc. are all the very similar. A fireplace and its fire are very important and, have many taboo, attached. Existing rich tales of kitchen gods are similar in the three countries. Moreover, people in the three countries, think that the clay or time plaster of the fireplace with bring good luck on New Year's eve. However, Korea kitchen god features one thing that is different from those China and Japan, that is that water symbolizes the kitchen god in Korea. A painted kitchen god as they are popular in China, has influenced only some Buddhist temples in Korea.

• 한국농공학회논문집
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• 제64권1호
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• pp.99-110
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• 2022

In this study, the generation and emission characteristics of particulate matter and gaseous matter in a mechanically ventilated layer house were evaluated. Each concentration of PM₁₀, PM_2.5, inhalable dust, respirable dust, and NH₃ was measured and compared with occupational limit considering seasons and respiratory disorder. CAPPS (Clean Air Policy Support System) of the Ministry of Environment proposes the emission factors of PM₁₀, PM_2.5, and NH₃ for a layer houses however, emission factors are still calculated from foreign factors such as CONINAIR values. As a result, it is urgent to develop national emission factors for domestic layer house. Emission coefficients of the studied mechanically-ventilated layer house in a summer season were calculated as 0.052 kg/head/year for PM₁₀, about 12% lower than that of CAPSS, and 0.0068±0.0038 kg/head/year for PM_2.5, showing no significant difference. Emission factor of NH₃ was calculated as 0.159±0.031 kg/head/year, about 51% lower than that of CAPSS.

• 소음진동
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• 제2권1호
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• pp.21-31
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• 1992

In the previous paper, we report a practical floor impact sound level prediction method for a heavyweight impact source(Tire), soft impact source such as children jumping and running. According to these results, the calculated value and the measured value correspond comparatively well, regardless of differences in the floor structures. And the floor impact sound for a heavyweight impact source, soft source was strongly influenced by structural factors such as floor slab stiffness and peripheral support conditions. But the floor impact sound for a light impact source (Tapping machine), hard impact source was influenced by resilient layers, composed of multi-layer in floor structures. Thus, In this paper, 4 actual floor structures, all with differing resilient layers, were calculated using impedance method. When these calculation values were compared with the measured values, approximately all the values fell with one rank of the sound insulation grade, reference curve(L curve) by the JIS standard. So, a sample of measured values and calculated values from floor structures is presented to show the accuracy and appropriateness of the impedance method in domestic.

• Smart Structures and Systems
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• 제18권2호
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• pp.293-315
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• 2016

Seismic isolation is often used in protecting mission-critical structures including hospitals, data centers, telecommunication buildings, etc. Such structures typically house vibration-sensitive equipment which has to provide continued service but may fail in case sustained accelerations during earthquakes exceed threshold limit values. Thus, peak floor acceleration is one of the two main parameters that control the design of such structures while the other one is peak base displacement since the overall safety of the structure depends on the safety of the isolation system. And in case peak base displacement exceeds the design base displacement during an earthquake, rupture and/or buckling of isolators as well as bumping against stops around the seismic gap may occur. Therefore, obtaining accurate peak floor accelerations and peak base displacement is vital. However, although nominal design values for isolation system and superstructure parameters are calculated in order to meet target peak design base displacement and peak floor accelerations, their actual values may potentially deviate from these nominal design values. In this study, the sensitivity of the seismic performance of structures equipped with linear and nonlinear seismic isolation systems to the aforementioned potential deviations is assessed in the context of a benchmark shear building under different earthquake records with near-fault and far-fault characteristics. The results put forth the degree of sensitivity of peak top floor acceleration and peak base displacement to superstructure parameters including mass, stiffness, and damping and isolation system parameters including stiffness, damping, yield strength, yield displacement, and post-yield to pre-yield stiffness ratio.

• 한국토양비료학회지
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• 제30권2호
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• pp.152-160
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• 1997

우리나라 전국 주요 시설재배지 토양을 표토 0-15cm와 심토 15-30cm 깊이로 구분하여 522점의 시료를 채취하고 중부지역에서 채소류 147점을 수확기에 채취하여 이들 토양 및 채소시료중에 함유된 Cd, Cu, Pb, Zn 및 As 함량을 조사한 결과를 요약하면 다음과 같다. 토양중 0.1N-HCl 가용성 중금속의 평균함량은 카드뮴 0.208(0.027~0.605), 구리 3.69(0.18~31.37), 납 2.49(0.02~33.55), 아연 23.3(2.1~113.2), 비소 0.65(0.03~2.2)mg/kg 이었다. 시설재배지 토양의 중금속 함량은 모두 '89년 조사한 일반 밭토양 자연함량보다 높은 함량을 보였고, 특히 카드뮴 및 아연함량이 시설재배지에서 높게 나타났다. 또한 시설 경작년수가 증가함에 따라 카드뮴, 구리 및 아연함량이 증가하였고 퇴비종류별로는 돈분퇴비 시용농가에서 높은 함량을 보였다. 그러나 시설재배지 토양의 중금속함량은 토양환경보전법의 토양오염 우려 및 대책기준과 비교하여 매우 낮은 함량수준으로 나타나 작물재배에 안전한 수준이었다. 채소 생체중의 중금속 평균함량은 카드뮴 0.015~0.047, 구리 0.341~0.802, 납 0.080~0.356, 아연 1.08~8.04, 비소 0.021~0.059mg/kg 으로 나타나 카드뮴 및 납의 경우 EU의 채소류 식품검토안(Cd : 0.10mg/kg, Pb : 0.50 mg/kg) 이하로 안전한 수준이었다.

• 한국응용곤충학회지
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• 제40권4호
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• pp.337-344
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• 2001

The house fly (Musca domestica L.) strains were derived from the Yumenoshima III strain by selecting with cypermethrin and methomyl for 19 and 16 generations, respectively. The resulting strains, cypermethrin resistance strain (Cyp-R19) and methomyl resistance strain (Met-R16), showed high level of resistance by 12906 and 51 times, respectively, comparing with the susceptible SRS strain. The Cyp-R19 strain was resistant to synthetic pyrethroids such as deltamethrin, esfenvalerate, fenpropathrin, $\beta$-cyfluthrin, showing > 11000, 1231, 103, 292 times higher $LD_{50}$ values than the SRS strain, respectively. It was also resistant to 3 organophosphates and 2 carbamates such as fenitrothion, profenofos, pyridaphenthion, benfuracarb, methomyl, showing resistance ratios fo 51, 17, 49, 39 and 62 comparing to SRS strain. The Met-R16 strain was resistant to synthetic carbamate benfuracarb, showing 6 times higher $LD_{50}$ value than SRS strain. It was also resistant to 4 organophosphates such as acephate, fenitrothion, profenofos and pyridaphenthion, showing > 40, 103, 19, 60 times higher $LD_{50}$ value. It was also resistant to 5 pyrethroids and a pyrrole such as cypermethrin, deltamethrin, esfenvalerate, fenpropathrin, $\beta$-cyfluthrin and chlorfenapyr, showing 3030, 249, 4063, 34, 330 and 86 times higher $LD_{50}$ values than the SRS strain. Cyp-R14 strain which was selected for 14 generations by cypermethrin and developed 11014 times higher resistance to the SRS strain was used in the dominance and linkage group analysis. Cypermethrin resistance inheritance was incompletely dominant in house fly as judged by the reciprocal cross between the resistant and susceptible strains. The linkage group analysis for the major factors responsible for this resistance was carried out by the$ F_1$male-backcross method, using susceptible multi-chromosomal marker aabys strain. The major factors for cypermethrin resistance were located on the 1st, the 3rd and the 4th chromosomes, and the effect of the 3rd chromosome was most prominent.

• Korean Journal of Radiology
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• 제22권8호
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• pp.1332-1340
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• 2021

Objective: To evaluate the feasibility of a new three-dimensional (3D) MR fingerprinting (MRF) technique for the prostate gland by conducting phantom and clinical studies. Materials and Methods: The new 3D MRF technique used in this study enables quick data acquisition and has a high resolution. For the phantom study, the MRF T1 and T2 values in an in-house phantom were compared with those of goldstandard mapping methods using linear regression analysis. For the clinical study, we evaluated 90 patients who underwent prostate imaging with MRF for suspected prostate cancer between September 2019 and February 2020. The mean T1 and T2 values were compared in the peripheral zone, transition zone, and focal lesions using paired t tests. The differences in the T1 and T2 values according to cancer aggressiveness were evaluated using one-way analysis of variance. Results: In the phantom study, the MRF T1 and T2 values showed a perfect correlation with the gold-standard T1 and T2 values (R > 0.99). In the clinical study, the T1 and T2 values in the peripheral zone were significantly higher than those in the transitional zone (p < 0.001, both). The T1 and T2 values in prostate cancer were significantly lower than those in the peripheral and transitional zones. The higher the grade of cancer, the lower the T2 values. Conclusion: The T1 and T2 values obtained from the 3D MRF showed a perfect correlation with the gold standard values in the phantom study. Differences in the T1 and T2 values among the different zones of the prostate gland were identified using 3D MRF in patients.

• 문화기술의 융합
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• 제10권5호
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• pp.61-69
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• 2024

아산 외암마을의 건재고택정원은 마을을 대표하는 설화산에서 비롯되는 마을의 풍수지리적 여건 및 마을을 관통하며 지나가는 인공물길 등과 더불어 마을의 경관을 구성하는 주요한 요소로서 역사적·학술적 가치를 함유하고 있으나, 오랜 시간을 거치면서 유지되고 있는 부분도 있지만 많은 부분이 소실, 교란, 왜곡되고 있는 실정이다. 특히, 외암마을의 주요 가옥에는 전통정원이 조성되어 있었지만, 건재고택의 정원은 일제강점기에 일본양식의 정원이 조성되어 서로 다른 정원문화가 하나의 장소에 공존하는 곳이라고 할 수 있어, 근대 문화재로서의 가치가 상당히 높다고 할 수 있다. 본연구에서는 건재고택의 정원에 대한 유전자 분석을 통해 과거의 모습을 예측하고, 그 결과에 대한 고증복원을 통해 건재고택의 정원에 대한 복원계획을 수립하는 것이다. 또한, 문화재의 원형 복원에 있어 훼손은 최대한 지양하고, 문화재 보전관리의 용이함을 도모할 수 있는 방법을 제시하는 것을 목적으로 하였다. 과거의 사진과의 대조 및 현장고증의 결과, 건재고택의 정원은 왜곡과 훼손이 반복되어 예전의 모습과는 다른 형태를 갖고 있다는 것을 발견할 수 있었다. 그리고, 유전자 분석을 통하여 과거의 모습을 재현할 수 있는 복원 방법을 제시할 수 있었다.