급성췌장염에 의한 췌장가성남종에서 내시경적 배액술후 발생한 췌장가성남종과 십이지장 및 대장에 발생한 내부 췌장루 1예

김연수,이문성,김진오,조영덕,이영홍,봉형근,조주영,이준성,심찬섭,황성규,전기원,변재호,장재영 대한소화기학회 1996 대한소화기학회지 Vol.28 No.1

휘발성 유기 화합물 가스 측정을 위한 전도성 고분자 센서의 제조 및 감응 특성

백지흠,황하룡,노진규,허증수,허덕동,임정옥,변형기 한국센서학회 2001 센서학회지 Vol.10 No.2

Conducting polymer sensors show high sensitivity when exposed to volatile organic compounds gases at room temperature. The 8 sensor array using by polypyrrole and polyaniline has been fabricated by chemical polymerization for measuring sensing characteristics of VOCs gases. Conducting polymer was polymerized by using distilled pyrrole, aniline as a monomer and ammonium persulfate (APS) as an oxidant and dodecylbenzene sulfonic acid (DBSA) as a dopant. Dedoped film was synthesized by reverse voltage and redoped film was synthesized by using 1-octanesulfonic acid sodium salt as another dopant in electrochemical cell. The sensitivity and reversibility were influenced by doping, dedoping, redoping and thiclrness for the polypyrrole and polyaniline. We investigated the relation between the structure of conducting polymer and sensitivity of these sensors through the analysis of scanning electron microscope (SEM), scanning probe microscope (SPM) and α-step.

스테인레스 전기로 슬래그 중 Cr 산화물의 환원속도에 관한 연구

김용환,양재웅,백영현,변기열 대한금속재료학회(대한금속학회) 2000 대한금속·재료학회지 Vol.38 No.4

Reduction rate of chromium oxide in slag phase was studied under an operating condition of EAF process. Synthetic CaO-SiO₂-Cr₂O₃ slag containing Al₂O₃, Fe₂O₃, or MgO were respectively prepared by sintering and pre-melting. STS 304 steel was melted in a graphite crucible under Ar-atmosphere by the high frequency induction furnace. The synthetic slag was placed on the steel melt and was reduced by carbon saturated melt. Reduction rates were measured by analyzing both steel and reacted slag sample. Microscopic analysis showed that chromium oxide in EAF slag existed largely in spinel form of FeO and MgO. Reduction yield was significantly increased by increasing temperature, and also decreasing basicity 1.5 to 1.0. The optimum temperature and basicity were found to be 1650℃ and 1.33, respectively. And the addition of Fe₂O₃ promoted the reduction rate considerably. Experimental results indicated that the reduction rate was controlled by the diffusion of chromium ion through the liquid slag phase at the initial stage of reduction and the activation energy for diffusion was found to be 129.79 kJ/㏖. It is worthy to note that reduction rate of chromium oxide increased by slag foaming at the later stage of reaction. It was also observed that SiC powder was far more effective than carbon powder as reductant at the initial stage of reaction.

Sparganosis 2 예

이연복,노병인,김정원 대한피부과학회 1972 大韓皮膚科學會誌 Vol.10 No.3

Two cases of sparganosis is reported. 45 year old male officer had a bean sized, migrating soft nodular lesion in the subcutaneous tissue of the left thigh and generalized itching sensation for 6 years duration. From the lesion one sparganum (22 cm in length) was obtained. 35 year oId sister had a bean sized subcutaneous nodular mass on left lower leg for 10 years duration and removed one sparganum (5 cm in legth) by surgical excision. The worms pale milky white and ribbon like in shape.

송전선로의 점퍼선 안전성 향상을 위한 횡진각 계산에 관한 연구

안영주,신춘식,변기식 한국산업안전학회 1997 한국안전학회지 Vol.12 No.1

As jumpers for overhead transmission lines increase in size, it is necessary to take into the characteristics of jumper swaying space in order to determine jumper reinforcements adequately. From the theory of a structure made of beams, formulas for the sideway swaying of overhead transmission lines due to wind are modeled. And also natural frequency of the vibrated jumper is estimated to check the system resonance. The theoretical results can be led good suggestions to improve the economy and reliability of jumper structure.

지역난방배관의 누수감지 신뢰성 향상에 관한 연구

안영주,신춘식,변기식 한국산업안전학회 1999 한국안전학회지 Vol.14 No.1

Local heating transportation pipe has sensor and return lines to detect water-leakage. There are impulse and resistance comparison measurement types for a water-leakage detection. The impulse type shows large detection error within a measurement range. Since the resistance comparison type can find a comparative accurate single water-leakage point in the measurement range of heating pipe, it has been used to detect water-leakages these days. However if the multi water-leakages are happened in the measurement range of transportation pipe, the resistance comparison type shows a detection error point by the parallel resistance between a detection sensor line and ground. But the detection error will be minimized by the divided transportation pipe loops. In this research, it suggests the design of remote controlled detection system which can divide a large pipe loop and a possible single water-leakage measurement process in each divided loops.

지구성 선수와 비지구성 선수의 동적 및 정적운동 중 심순환계 반응

정덕조,주기찬,변재경 한국운동과학회 2000 운동과학 Vol.9 No.1

지구성 선수와 비지구성 선수의 동적 및 정적 운동 중 심순환계 반응. 운동과학. 제 9권 제 1호, (13)-(28), 2000 본 연구는 지구성 동적유형의 운동선수와 비지구성 정적유형의 운동선수의 동적 및 정적운동 중 심순환계 반응을 비교함으로써 운동유형에 따른 적응현상을 알아 보는 데 그목적을 두었다. 피검자는 총 27명으로 고등학교 및 대학교의 역도선수 9명(나이 18±2세, 신장 171±5㎝, 체중 78±9㎏, 운동경력 6±1년), 레슬링선수 9명(나이 19±2세, 신장 168±6㎝, 체중 67±13㎏, 운동경력 6±1년), 장거리선수 9명(나이 19±2세, 신장 171±4㎝, 체중 58±5㎏, 운동경력 8±3년)이었다. 피검자는 트레드밀을 이용한 동적운동과 다용도 근력장치(Cybex 770)을 이용한 정적운동을 각각 하였고 두가지 운동 중 심박수, 수축기 혈압, 확장기 혈압 심근산소요구량(RPP)을 체중당 산소섭취량, 산소맥, 호흡교환률을 측정하였다. 동적 및 정적운동 중 심박수, 심근의 산소요구량은 각 상대적 운동강도별로 역도 선수, 레슬링 선수, 장거리 선수의 순으로 높게 나타났다. 수축기 혈압은 동적운동 중 장거리 선수, 레슬링 선수, 역도 선수의 순으로 높게 나타났으나 정적운동 중에는 반대로 역도선수, 레슬링 선수, 장거리 선수의 순으로 높게 나타났다. 확장기 혈압은 동적운동 및 정적운동 중 장거리 선수, 레슬링 선수, 역도 선수의 순으로 낮게 나타났다. 체중당 산소섭취량은 동적운동 중 장거리 선수, 레슬링 선수, 역도 선수의 순으로 높게 나타났으며 정적운동 중에는 유의한 차이를 보이지 않았지만 장거리 선수 집단에서 가장 높게 나타났다. 산소맥과 호흡교환률은 동적 및 정적운동 중에 집단간 유의한 차이를 보이지 않았다. 세 집단은 각기 고유의 운동유형에 따른 적응 특성을 보여주었으며, 그 중에서 장거리 선수의 적응 특성은 전형적인 지구성 트레이닝의 효과를 반영하는 것으로서 가장 바람직한 심순환계 적응을 보여 주었다. Cardiovascular Responses to Dynamic and Static Exercise in Endurance and Nonendurance athletes. Exercise Science, 9(1): 13-28, 2000. The purpose of this study was to compare the cardiovascular reponses during dynamic and static exercise in weightlifters, wrestlers, and distance runners, so that the difference of cardiovascular adaptation among them might be verified. The subjects were 27 high school and collegiate athletes and consisted of 9 weightlifters, 9 wrestlers, and 9 distance runners. Each group of athletes performed treadmill running and isometric knee extension as a dynamic and static exercise, respectively. Cardiovascular variables such as HR, SBP, DBP, RPP and metabolic variables like Vo2/㎏, O2-pulse, R were measured during both exercise. HR and RPP were highest in weightlifters and lowest in distance runners at each relative workload. SBP during dynamic and static exercise were highest in distance runners and lowest in weightlifters, respectively. It was considered that the highest value of SBP in distance runners during dynamic execise resulted from increased SV. However, the highest value of SBP in weightlifters during static exercise mainly resulted from increased peripheral resistance. By the same token, DBP decreased during dynamic exercise reflected decease of peripheral resistance and increased DBP during static exercise depended on increase of peripheral resistance. Distance runners showed lowest DBP value during both dynamic and statric exercise. Vo2 values during both dynamic and static exercise were highest in distance runners. However, O2 pulse and repiratory ratio showed no significant differences among 3 groups. Each group of athletes seemed to have their own adaptive characteristics due to exercise type and training specificity. From the view point of health related exercise, it was considered the most desirable cardiovascular adaptation took place distance runners.

Korean species of the genus Cochylidia (Lepidoptera: Tortricidae) in Korea

Bong-Kyu Byun,Da-Som Kim,Woon Kee Paek 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04

Genus Cochylidia, belonging to the tribe Cochylini under the family Tortricidae, consists of small-sized moths, which is one of the small group with only 11 described species until now (Brown 2005; Sun & Li 2012). Recently, Brown (2005) listed eight species and one subspecies. Later, three species were added to the genus by Sun & Li (2012) from China. In Korea, Park (1976) reported the genus Cochylidia with three unrecorded species, C. contumescen Meyrick, C. richteriana Fischer von Röslerstamm, and C. subroseana Haworth from Korea. Later, Byun et al. (1996) reported two additional species from Korea: C. heydeniana Herrich-Schäffer and C. moguntiana Rösler. Recently Byun et al. (2017) reported the genus in Korea with two new species, C. flavifasciatus Byun and C. hallasanensis Byun. In this study, we provide the checklist with its external characteristics, localities, and images of adults and genitalia.

Translation of the Modal Verbs with the Perfect Aspect of the Korean EFL Learners

Byun,Hye Won 한국통번역교육학회 2019 통번역교육연구 Vol.17 No.4

Modal verbs have always been a challenge for the English as a Foreign Language (EFL) learners as various usages and profound underlying meaning of the modal verbs are difficult to be fully acquired by conventional grammar drill exercises. On top of the difficulties, added burden is given to the learners when they are faced to express a condition that did not really happen in the past. To express this condition, they would not only need to know the meaning of the various modal verbs, but also the 『modal verb + have + past participle』 structure. To ease the burden, this research aimed to investigate how translated teaching method could help the learners, compared to the conventional grammar drill exercises. Both the qualitative and the quantitative results show that the translated method was effective for the learners. Nearly 80% of the students chose the translated method and stated that using this method seem to be effective as they could impose the meaning from the sentence and see the semantic usage of the words. Next. quantitative results show that students were not able to understand the various meanings of the 『modal verb + have + past participle』 structure even though they successfully completed the grammar tests. The results were all consistent from high, mid and the low proficiency levels.

The Effect of Translated Writing Method on Learning Article Differences for EFL Learners

Byun,Hye Won 한국통번역교육학회 2020 한국통번역교육학회 학술대회 자료집 Vol.2020 No.1