Shattering Grain Loss in Relation to the Impulse During Harvest and Year-Variation of Grain Tensile Strength in Rice

Kwon,Yong Woong,Jin chul Shin 한국작물학회 1983 한국작물학회지 Vol.28 No.4

핸드스프링 몸펴 앞공중1회 비틀기 동작의 소요시간 및 각운동량 분석

권오석,윤양진,서국웅 한국운동역학회 2002 한국운동역학회지 Vol.12 No.2

남자 기계체조 국가대표 선수 3명과 대학선수 3명을 대상으로 핸드스프링 몸펴 앞공중1회 비틀기 동작을 구간 및 국면별로 분석하고 동작의 숙련도에 따라 역학적 변인이 집단 간 어떠한 차이를 보이는지를 구명하기 위하여 Kwon3D 프로그램을 활용하여 분석한 결과 다음과 같은 결론을 얻었다. 시간요인에서 보폭을 크게 딛는 것이 손을 빠르게 지지 할 수 있고, 핸드스프링 체공시간은 짧게 하여야 발구르기의 압력을 높여 비틀기동작에서 체공 소요 시간이 길어지므로 비틀기 수행의 완성도를 높일 수 있는 것으로 나타났다. 각운동량 요인에서 기술수행 시 전체적으로 좌우(X)축에 대한 각운동량이 전후(Y)축과 수직(Z)축에 대한 각운동량에 비해 더 큰 값을 보였다. 좌우 축 각운동량은 지면에서 이지되어 동작을 수행하는 핸드스프링회전과 앞공중1회 비틀기에서 숙련자가 상대적으로 더 큰 각운동량 보이는 것으로 나타났다. The purpose of this study were a two-fold: ⑴ to analyze event and phase of handspring salto forward stretched with turn; ⑵ to know the differences in the kinematic variables between two groups. A Kwon3D program served for the estimation of this study. The group was divided into three National representative and three well-trained calisthenics in this study. The results of this study revealed that ⑴ the forward somersault performance was increased when duration time in the air was long during the salto forward stretched that the duration time of Handspring is short, the pressure at takeoff is high, the stride is large, and hands are supporting on the ground quickly; ⑵ comparing the angular movement of anterior and posterior y axis and vertical z axis, the angular movement of right and left x axis was higher during the performance. As a result, the national representative players showed better performance in Handspring salto forward stretched with turn.

김소월 시의 리듬 연구

권혁웅(Kwon, Hyuk?woong) 한국시학회 2013 한국시학연구 Vol.- No.37

이 논문은 소월의 대표시 다섯 편을 소리?뜻(프로조디)을 중심으로 분석한 논문이다. 다섯 편의 리듬 분석을 통해 7·5조 정형률로만 평가받던 김소월의 시에 소리?뜻을 중심으로 구축되는 자유시의 리듬이 내재해 있음을 확인하였다. 매 시편마다 두 개 이상의 소리 복합체가 동심원의 중심을 이루고 확산되면서 리듬을 구성하고 있었다. 이를 통해 확인된 리듬론의 일반원칙은 다음과 같다. 첫째, 정형적 척도로서의 강세 대신에 의미상의 강세를 중심으로 리듬을 기술해야 한다. 주체의 발화는 늘 의미론적 맥락에 따라 더 강조하고 덜 강조하는 지점을 발생시키기 때문이다. 둘째, 개별 음소가 아니라 여러 층위의 음운복합체가 소리?뜻을 이루는 단위가 된다. 자음이나 모음 단독으로는 유의미한 소리?뜻을 얻기 어렵다. 셋째, 한 편의 시에는 서로 다른 의미자질을 중심으로 펼쳐지는 둘 이상의 소리?뜻이 있으며, 둘의 간섭과 상호작용에 따라 시 전체의 리듬이 모습을 드러내는 경우가 많다. 넷째, 의미 분석이 리듬 분석에 선행해야 한다. 시에서의 핵심어가 의식적, 무의식적으로 반복되면서 소리?뜻들을 출현시키기 때문이다. 핵심어에 의미론상의 강세가 오는 것은 지극히 자연스러운 일이다. This paper analyzed five representative poems by So?wal and focused on ‘a sound?meaning(prosody)’. Mostly his poems rated as one of traditional poems consists of 7.5 syllable rhythm. It means that the rhythm of So?wal’s poems contains not a fixed form of verse but the free verse. The rhythm of each and every poem consists of circles that having sense and meaning at the same time and there are the complicated system with more than two sounds. We will be able to get if we follow the following potential benefits to the General Convention of the rhythm theory proposed in this article. At first, the rhythm should be described by the semantic accent instead of the accent as a fixed measure. Since the utterance of the subject causes a differences of emphasis(more emphasized and less emphasis) according to the context of meaning. Second, it’s not a segmental phoneme but the complex phonological system with many levels that the unit consists of a ‘sound?meaning(prosody)’. It’s difficult for a single vowel or a single consonant to get a meaningful ‘sound?meaning’. Third, a poem contains two or more sound?meaning(prosody)s with different semantic features and the interaction between them mostly shows the rhythm of a whole poem. At last, the analysis of rhythm must be preceded by the semantic analysis. Because the conscious and unconscious repetition of a keyword in the poem brings sound?meaning(prosody).

교액성 폐쇄공탈장 1예

조태웅,민영돈,김경종,정권율,강성인,류소연,임성철 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.1

Obturator hernia is a rare pelvic hernia, occuring most frequently in elderly, extra-thin or debilitated women. Because of the anatomic character of the obturator foramen and the nonspecific symptoms in the presence of the hernia, the risk of strangulation of the herniated bowel is high, which leads to high morbidity and mortality rate. The authors experienced an unusual case of left obturator hernia with strangulation of the small bowel in an 80-year old female. The hernia was diagnosed by abdomino-pelvic computed tomography (CT) scan. Through the lower midline transperitoneal approach, resecting the strangulated small bowel, the hernia sac was ligated and the obturator foramen was repaired using adjacent broad ligament. We report these findings with a brief review of the literature.

사이버 여행기업 이용자의 만족도 분석

이응규,김용완,권현재 한국관광정보학회 2003 觀光情報硏究 Vol.- No.13

This is an empirical study on the user's satisfaction to cyber travel agencies. The digital trend has pur our travel market into a transition period. The number of internet sites related with domestic travel have been growing day by day. But they don't provide the consumers with enough information of the products they offer. They are nothing better than a home page introducing themselves. This study is designed to establish the theoretical backgrounds of the cyber travel agencies and their present situations inn Korea through satisfaction analysis in order to find out solutions to the problems they face, eventually developing the models for the internet business. This study analyses recent cyber travel market all of the world and suggests strategies for cyber travel agencies. Main suggestions to be successful cyber travel agencies are as follows; Cyber travel agencies have to (1) respond to changing environment on internet industry and user's needs; (2) develop new travel products and websites to appeal special interset segments; (3) cooperate with business partner to elevate competitiveness in cyber travel market.

선삭가공에서 절삭력을 이용한 공구마멸의 감지

윤재웅,이권용,이수철,최종근 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.1

The development of flexible automation in the manufacturing industry is concerned with production activities performed by unmanned machining system. A major topic relevant to metal-cutting operations is monitoring tool wear, which affects process efficiency and product quality, and implementing automatic tool replacements. In this paper, the measurement of the cutting force components has been found to provide a method for an in-process detection of tool wear. The static components of cutting force have been used to detect flank wear. To eliminate the influence of variations in cutting conditions, tools, and workpiece material, the force modeling is performed for various cutting conditions. The normalized force disparities are defined in this paper, and the relationships between normalized disparity and flank wear are established. Finally, artificial neural network is used to learn these relationships and detect tool wear. According to the proposed method, the static force components could provide the effective means to detect flank wear for varying cutting conditions in taming operation.

구개주름의 형태형성과 Retinoic Acid로 유발된 이상

김혜진,신웅기,권오유,이영호,김원식 충남대학교 의과대학 지역사회의학연구소 1996 충남의대잡지 Vol.23 No.2

Morphogenesis of palatal rugae and retinoic acid-induced anomalies, numerical and pattern disruptions, were studied to know the mechanism of normal rugae formation and the relations between these disruptions and retinoic acid teratogenecity. Sprague-Dawley rats and all trans retinoic acid of Sigma Chemicals were used in this experiment. Retinoic acid was administered at gestational day 8, 9, 10, 11, and 12 by the dose of 60mg/kg 80mg/kg 100mg/kg and 120mg/kg respectively per orally. At the gestational day 17.5, the rats were sac rificed under ether anesthesia and removed entire uterine horns into the saline-filled Petri dish. Congenital anomalies on the head and palatal rugae were observed with stereoscope. and light and transmission electron microscopic observation were performed to investigation histologic changes of the rugal epithelium and mesenchyme after retinoic acid treatment. The results were as follows; 1. Retinoic acid-induced congenital anomalies in this experiment were exencephaly and hydrocephalus in gestational day 8 and 9 groups, and cleft palate in gestational day 9 and 10 groups, and the number of anomalies was increased dose dependently. 2. Severe numerical variation and pattern disruptions such as division, medial and lateral fusion, cross, bifid rugae and rugal papillae were found on the gestational day 9 and 10 groups, and the relation between the retinoic acid teratogenecity and the numerical and pattern disruptions of the rugae were very close. 3. On TEM observation, the basal laminae under the rugal epithelium were absent at many areas and the filopodiae of the epithelial cells protruded into the underlying mesenchyme. According to the above results, it is considered that the mesenchymal cells of palatal shelf migrate into the designated areas of epithelium through the basal lamina, proliferate rapidly and form the rugae. Retinoic acid may inhibit the proliferation and migration into the epithelium of mesenchymal cells and the incompatibility between the growth of palatal shelf and the slowed speed of mesenchymal cells migration into the epithelium will leads the numerical and pattern disruptions of the rugae. And the relation between the teratogenecity of the retinoic acid and the numerical and pattern disruptions of the rugae was considered to be very close.

물리탐사법을 이용한 콘크리트 구조물의 결함조사에 관한 연구

서백수,손권익,장선웅 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A

Various nondestructive prospecting method were applied to detect the flaw of concrete structure, but the satisfactory result could not be obtained, yet. Fracture and cavities existing concrete structure will have a bad effect on physical and mechanical characteristic of concrete. This study deal with detection of flaws using seismic first arrival and various inversion method in theoretical model. And ultrasonic seismic method is tried to experimental model to detect fracture and cavity.

흰쥐 경동맥 풍선손상 모델에서 리포좀 전달체를 이용한 에스트로겐의 국소전달 효과

윤영섭,장양수,정광회,박요석,김형관,강웅철,권진욱,정보영,조상호,김성순 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

Macro modeling of ion sensitive field effect transistor with current drift

Kwon, Dae Woong,Kim, Sihyun,Lee, Ryoongbin,Mo, Hyun-Sun,Kim, Dae Hwan,Park, Byung-Gook Elsevier 2017 Sensors and actuators. B Chemical Vol.249 No.-

<P><B>Abstract</B></P> <P>In terms of the application of the ion sensitive field effect transistor (ISFET) fabricated with top-down approached and CMOS-compatible back-end process to integrated circuits, the macro model of the ISFET is required. Although several models have been reported, there is no electrical model that reflects the time-dependent drain current (<I>I</I> <SUB>D</SUB>) change (drift effect). We propose the electrical model which can reflect the drift effect and can be expressed by the combination of electrical circuit components. In the proposed model, <I>R</I> <SUB>1</SUB> represents the resistance of the electrolyte and the FET can be approximated by the capacitances <I>C</I> <SUB>1</SUB> (capacitance of pure gate oxide in which hydrogen ions move very slowly) and <I>C</I> <SUB>2</SUB> (capacitance by gate oxide with defects in which hydrogen ions move relatively faster). Furthermore, the movement of hydrogen ions in the defective oxide is represented by <I>R</I> <SUB>2</SUB> and the current drift is modeled as the parallel combination of the <I>C</I> <SUB>2</SUB> and the <I>R</I> <SUB>2</SUB> because the drift effect is strongly related to hydrogen ion movement through defective gate oxide or Helmholtz layer. Consequently, the ISFET with the <I>I</I> <SUB>D</SUB> drift can be modeled by the series connection of the <I>R</I> <SUB>1</SUB>, the parallel combination of the <I>C</I> <SUB>2</SUB> and the <I>R</I> <SUB>2</SUB>, and the <I>C</I> <SUB>1</SUB>. Also, The <I>I</I> <SUB>D</SUB> calculated by the proposed model is successfully fitted to the measured time-dependent <I>I</I> <SUB>D</SUB> of the ISFET.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Silicon nanowire field-effect transistor sensors (SiNW sensors) were co-integrated with CMOS read-out circiuts by using top-down approached and CMOS-compatible back-end process. </LI> <LI> The drift of drain current in SiNW sensors was analyzed under various conditions of pHs and liquid gate voltages. </LI> <LI> The electrical model which can reflect the drift effect and can be expressed only by the combination of electrical circuit components was proposed. </LI> </UL> </P>