• Parasites, Hosts and Diseases
• /
• 제52권3호
• /
• pp.291-294
• /
• 2014

Acanthotrema felis is an intestinal trematode of cats originally reported from the Republic of Korea. Only 1 human case infected with a single adult worm has been previously recorded. In the present study, we report 4 human cases infected with a total of 10 worms recovered after anthelmintic treatment and purging. All 4 patients reside in coastal areas of Jeollanam-do, Korea, and have consumed brackish water fish including the gobies, Acanthogobius flavimanus. The worms averaged 0.47 mm in length and 0.27 mm in width, and had 3 sclerites on the ventrogenital sac; 1 was short and thumb-like, another was long and blunt-ended, and the 3rd was long and broad-tipped. They were identified as A. felis Sohn, Han, & Chai, 2003. Surveys on coastal areas to detect further human cases infected with A. felis are required.

• 한국식품저장유통학회지
• /
• 제7권1호
• /
• pp.94-98
• /
• 2000

To produce liquor and vinegar using potatoes needs to liquefy and sacchrify potatoes . So selecting the efficient fermenter for proceeding these process successfully is very important . This study was investigated several fermenter and crush types of potatoes for alcohol fermentation. Final sugar contents was high in pottoes saccharificatiion by nuruk or crude enzyme. But pure enzyme and blucoamylase ended liquefaction and saccharificatiion within short ime. So complex type fermenter mixed several fermenters was superior to single type fermenter. Complexfermenter III using crude enzyme and glucoamyulase saccharificed excellently potatoes with 150% of water contents by treatment of 3 hours. Through alcohol fermentation using pressure steamed potatoes (PSP), it could be obtained 6.4% , 150%, of alcohol content and yield. However to perform a series process efficiently , crush steamed pottoes (CSP) was suitable. When it was fermented after saccharification using crush steamed potatoes and complex fermenter III, it could be obtained 6.6% of alcohol and 6.7% of acidity.

• 대한기계학회논문집B
• /
• 제29권1호
• /
• pp.27-34
• /
• 2005

We analyze in detail axially symmetric theoretical study for the photothermal pulsed radiometry of a cylindrical model. The theoretical solutions describe the transient infrared radiation from the sample heated by short-duration pulsed heating. In the conventional transmission radiometry technique, the excitation source and the detector are on opposite sides of the sample, otherwise in the new single ended radiometry technique, the excitation source and the detector are on same sides of the sample. The analytical solution described for photothermal radiometry in this study would not need to cut or polish samples to measure the thermal diffusivity. Therefore the radial area and axial thickness of samples are not limited. The effects of excitation pulse duration and the area of heat source are discussed.

• 대한수학교육학회지:학교수학
• /
• 제2권1호
• /
• pp.73-95
• /
• 2000

In this study, on the basis of the seventh national mathematics curriculum, the achievement standards were developed to specify the objectives and contents of teaching-learning at the first and second elementary school mathematics. The assessment standards were also developed to differentiate students’ levels of achievement with ‘high’, ‘mid’ and ‘low’ categories. Furthermore, this stuffy suggested the exemplary test items including short-answer and open-ended questions while putting emphasis on students' real performance to increase their ability in solving problems rather than in calculating. In addition to the test items, it introduced the grading system developed to grade the items with concrete guidelines and to report students' achievement on doing mathematics.

• 한국정보통신학회논문지
• /
• 제13권10호
• /
• pp.2059-2065
• /
• 2009

본 연구에서는 윗면에 횡방향 슬릿을 갖는 단락종단된 평행평판도파관에 TEM파가 입사되는 경우를 고려하였다. 슬릿의 폭이 좁은 경우에 대한 슬릿의 등가어드미턴스를 구하고 슬릿영역근처에서 복소전력의 변화를 관찰하였다. 특히, 슬릿근처에 존재하는 근접 도체산란체와의 결합에 의해 도파관 외부로의 결합전력이 최대가 되는 경우에 있어서 슬릿 양단의 전압과 도파관 내외부 복소전력에 관한 조건을 점검하였다.

• 한국정보통신학회:학술대회논문집
• /
• 한국해양정보통신학회 2010년도 춘계학술대회
• /
• pp.662-664
• /
• 2010

본 논문에서는 5-10GHz 광대역 운용에 적합한 quasi-Yagi안테나를 설계하는 방법에 대해 연구하였다. Yagi 안테나는 단락종단된 마이크로스트립선로로 급전되며, 내장된 Balun 회로에 의해 정합되도록 하였다. FR4기판(비유전율 4.4, 두께 0.8mm)상에 제작된 안테나의 특성을 실험한 결과 컴퓨터 시뮬레이션에 의한 예상치와 잘 일치함을 관찰하였다.

• 대한소화기학회지
• /
• 제72권5호
• /
• pp.245-251
• /
• 2018

Gastric cancer is the most common cancer in Korea and the fifth most common cancer globally. Helicobacter pylori (H. pylori) infection is considered the main etiologic agent for gastric cancer development. Most regional guidelines for H. pylori treatment recommend treating the organism to prevent gastric cancer in the high-risk group. However, evidence that such a strategy can also be applied to the general population, especially in terms of the preventive effect and safety, has not been adequately presented yet. Although a meta-analysis in the general population suggested effectiveness in decreasing gastric cancer incidence, individual studies should be critically reviewed to evaluate the soundness of the evidence. Recently published, long-term, Korean studies on metachronous gastric cancer prevention ended the controversies from previous short-term studies and confirmed the effectiveness. Currently, further prospective, large, randomized studies are ongoing in the general population and will provide more definitive, high-level evidence on this gastric cancer prevention strategy in the next decade.

• 대한전자공학회논문지TC
• /
• 제38권7호
• /
• pp.22-27
• /
• 2001

본 논문에서는 자체 설계 및 제작한 개방단말 동축선 프로브를 이용하여 분말(설탕, 밀가루)과 고체(테플론, 아크릴)와 같은 다양한 유전체에 대하여 복소 유전율을 측정하였다. 측정장치로 프로브를 동축선을 통하여 벡터 회로망 분석기(VNA)와 연결하였다. 동축선의 끝단까지는 OSL(개방, 단락, 부하) calibration kit를 이용하여 교정하였다. 동축선 끝단에 프로브를 삽입함으로 발생하는 위상차이는 증류수에 대하여 수치계산한 반사계수를 이용하여 보상하였다. 측정매질의 표면에 프로브를 접촉시켰을 때 측정한 반사계수를 가상의 원추형 선로 모델에 대입하여 복소 유전율을 환산하였다. 30 MHz부터 3 GHz에 걸친 광대역 주파수 범위에서 여러 가지 분말과 고체에 대하여 본 논문의 방법으로 측정한 복소 유전율을 한국표준과학연구원(KRISS)에서 잔송선로법으로 측정한 결과와 비교하였다.

• 한국의류학회지
• /
• 제19권5호
• /
• pp.747-764
• /
• 1995

The purpose of the present study were 1) to identify the dimensional structure of impression formed of a female figure, 2) to analyze effects of several elements of apparel design on impression formation of the figure in suit. The experimental materials developed for this study were a set of stimuli and a response scale. The stimuli consisted of 60 drawings made by identical manipulations of 3 indepndent variables in 3 clothing styles(suit, dress and pants with blouse). The independent variables were (1) five clothing colors (red, blue, yellow, white and black), (2) two lengths(short/long) of suit skirt, dress, and pants (3) two types of blouse and dress collars (shirt collar/ribbon collar). The 7-point semantic differential response scale to measure the dependent variables (formed impressions of the female figure) was composed of 37 bipolar adjectives. Further- more, two open-ended questions were used for interpretation of the reponses. The study proceeded in three independent experimental part was based on the 3 clothing styles using a 5(color)$\times$2(length)$\times$2(collar) factorial design. Subject were 200 female undergraduate students reandomly assigned to one of 20 combinations in each part of the experiment. The data were analyzed by factor analysis, 3-way ANOVA and Multiple Classification Analysis. Five factors emerged to account for the dimensional structure of impression of the female figure in specific attire. These factors included three basic dimensions of impression identified as potency, activity and evaluation, confirming the results of previous studies. Result from open-ended questionaire supported the theoretical perspective of Schneider, Hastorf and Ellsworth on the procedure of impression formation.

• 한국학교수학회논문집
• /
• 제22권4호
• /
• pp.439-460
• /
• 2019

본 연구는 교사 질문, 말하기 차례 규칙, 학생 발화 사이의 관계를 파악하고자 수학 교실 내의 언어적 상호작용을 분석하였다. 이를 위해 같은 학교에 근무하고 있는 세 명의 초등학교 교사들(1학년 교사 2명과 2학년 교사 1명)의 수학 수업을 대화분석 기법을 사용해서 분석하였다. 각 교사들의 수업은 일 년에 걸쳐 총 3회 관찰되었다. 분석 결과, 교사가 열린 질문(예를 들어 "왜" 그리고 "어떻게" 질문들과 "동의합니까" 그리고 "동의하지 않습니까" 질문들)을 사용하고 비전통적인 말하기 차례 규칙(교사발문-학생답변-교사 피드백; Mehan, 1979)을 사용하였을 때는 학생들이 자신의 생각을 정당화하고 다른 사람의 생각을 반박하기 위해 교실 담화에 보다 적극적으로 참여하여하는 것으로 나타났다. 하지만, 교사가 닫힌 질문(예를 들어 "무엇" 질문들)을 사용하고 전통적인 말하기 차례 규칙을 사용하였을 때 학생들은 정답을 말하는 것에만 관심을 갖고 짧은 발화만을 사용하는 것으로 드러났다. 본 연구의 시사점은 다음과 같다. 첫째, 교사들은 효과적인 수학-대화 학습공동체를 만들기 위해 열린 질문을 사용하고 비전통적인 말하기 차례 규칙을 사용해야 한다. 둘째, 교사들이 발화기법에 관한 실질적인 지식을 얻을 수 있도록 교육 행정가와 수학 교육자들이 지원해야 한다.