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Genetic Differences and Variation of Ascidians, Halocynthia roretzi von Drasche and H. hilgendorfi Oka Identified by PCR Analysis

  • Yoon, Jong-Man;Kim, Jong-Yeon
    • Development and Reproduction
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    • v.15 no.4
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    • pp.359-364
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    • 2011
  • The seven selected primers OPA-02, OPA-04, OPA-18, OPD-07, OPD-08, OPD-15 and OPD-16 were used to generate unique shared loci to each species and shared loci by the two species. The hierarchical dendrogram indicates three main branches: cluster 1 (RORETZI 01~RORETZI 11) and cluster 2 (HILGENDORF 12~HILGENDORF 22) from two geographic populations of ascidians, Halocynthia roretzi and H. hilgendorfi. The shortest genetic distance displaying significant molecular difference was between individuals' HILGENDORF no. 14~HILGENDORF no. 19 (genetic distance =0.008). Ultimately, individual no. 02 of the RORETZI ascidian was most distantly related to HILGENDORF no. 21 (genetic distance=0.781). These results demonstrate that the H. roretzi population is genetically different from the H. hilgendorfi population. From what has been said above, the potential of PCR analysis to identify diagnostic markers for the identification of two ascidian populations has been demonstrated. Generally speaking, using a variety of decamer primers, this PCR method has been applied to identify specific markers particular to line, species and geographical population, as well as genetic diversity/polymorphism in diverse species of organisms.

Misunderstandings and Truth on Student-Centered Instruction (학습자 중심 수업에 대한 오해와 진실)

  • Kim, Jin-Ho
    • Education of Primary School Mathematics
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    • v.11 no.2
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    • pp.81-94
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    • 2008
  • The 7th national curriculum requires the paradigmatic shift in education from teacher-centered to student-centered instruction. But, teachers beliefs on instruction have not been changed during implementing of the mathematics textbooks based on the curriculum. More exactly speaking, they are changed very slowly. Therefore, some beliefs they should establish in order for them to implement it were discussed: Perspectives of students' intelligent ability, learning goal for the every lesson, the passibility of teaching contents involved in the national curriculum, the size of classroom, and students' achievements.

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Characteristics of Scroll-type Stirling Engine for Solar Power (태양열 발전용 스크롤 방식 스털링 엔진의 특성)

  • Kim, Young-Min;Shin, Dong-Kil;Kim, Woo-Young;Kim, Hyun-Jin;Lee, Sang-Tae
    • 한국신재생에너지학회:학술대회논문집
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    • 2008.05a
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    • pp.169-173
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    • 2008
  • Stirling engine is a promising heat engine with a high efficiency, muti-fuel capability, low emission, quiet operation, very low maintenance and long life. As one of the promising applications, solar power system based on the Stirling dish, providing net solar-to-electric conversion efficiencies reaching 30%, can operate as stand-alone units in remote locations or can be linked together in groups to provide utility-scale power. This paper introduced a new Scroll-type Stirling engine, being developed for solar power, superior to conventional Stirling engines. The Scroll-type Stirling engine is characterized as traits of continuous and wholly separated compression and expansion; one-way flow system; direct cooling and heating the fluid in the working spaces through the extensive inner surfaces of scroll wraps. All theses traits contribute to achieving thermodynamic cycle closer to the ideal Stirling cycle (exactly speaking, Ericsson cycle).

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Tips for English Presentations by Busy Doctors (바쁜 의사를 위한 영어발표 요령)

  • Song, Ho-Young
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • v.11 no.sup2
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    • pp.1-10
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    • 2008
  • When you present a medical scientific paper or give a lecture in English, It is important to visit your presentation room in advance to gain familiarity with the controls and the computer. You can check how to use the mouse or laser pointer and determine where the microphones are. You should meet the Chairman and introduce yourself. You may ask the Chairman any questions you have. I am confident this strategy will work for beginners because they are usually nervous before their presentations. Most Chairmen prepare one or two questions for the presenters to stimulate discussion. Speaking with the Chairman also allows you to determine the type of English that he or she speaks (i.e., French-English, Spanish-English, and British-English). You need to be comfortable with the Chairman's English before the presentation because the Chairman will repeat the questions for you when you do not understand a question from the audience. Although I have given a number of lectures and moderated many scientific sessions and symposiums in English over the past 20 years, it is still difficult and stressful for me to do these in English because English is not my first language. To overcome the problems, I have written down the questions and useful English expressions that I have received during or after my presentation because I found them helpful for my next presentation. I hope the examples will be of great help to you.

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A Study on the Sociocultural Backgrounds of the 'Baby Face Fad' and Phrenological Characteristics (동안(童顔) 열풍의 사회문화적 배경과 골상학적 특징)

  • Kim, Nam-Hee;O, In-Young
    • Journal of the Korean Society of Clothing and Textiles
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    • v.33 no.10
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    • pp.1530-1540
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    • 2009
  • Life expectancy has increased and people are more concerned with keeping their 'youth'. Appearance is a competitive edge and people are caught up in a baby face fad that has expanded into a culture and beauty trend. This study examined the definitions and phrenological characteristics of a baby face and the causes of the baby face fad in a review of the baby face as a "sociocultural and beauty cultural code" based on literature, journals, previous papers, and Internet materials. Anatomically speaking, a "baby face" refers to a face that keeps the features of a child's face without aging signs. The baby face fad gained momentum due to the influences of the digital culture, the encouragement of the mass media, changes to the social structure, dietary improvements, new living styles, and an evolving aesthetic sense. The results reveal the sociocultural backgrounds behind the "baby face fad" settling down as a part of culture in addition to the phrenological characteristics of a baby face. It is also estimated that the baby face fad could affect the beauty culture and trends as a social phenomena.

Review of Literature on Languor and fatigue (무기력(無氣力) 및 피로(疲勞)에 관(關)한 문헌적(文獻的) 고찰(考察) -(동서의학적(東西醫學的) 비교고찰(比較考察), 원인(原因).증상(症狀)을 중심(中心)으로)-)

  • Oh, Tae-Whan;Jung, Sung-Gi;Rhee, Hyung-Koo
    • The Journal of Internal Korean Medicine
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    • v.11 no.2
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    • pp.80-93
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    • 1990
  • Review of Literature on Languor and fatigue. According to comparative studies of Oriental and Western medical Literature on the Languor and fatigue on causes and symptom, flowing results were obtained. 1. Common etiologies of the Languor and fatigue in Western medicine are firstly exhaustion of energy, secondly variation of control center-neurotic and body fluid control-, thirdly variation of a living body physico chemical state, forthly production of middle metabolic product, fifthly psychological instability. 2. The expression of the Languor and fatigue in Oriental medicine are consumption, dificiency of vital energy(氣虛), illness caused by overexertion and dificiency of essence of life(精虛). The caure of the Languor and fatigue are dificiency in spleen and stomach(脾胃虛弱), dificiency of both the lung and kidney(肺腎兩虛), the six excessive(六淫), irregular life and excessive mental labor. 3. The symptomes of the Languor and fatigue in western medicine are systemic feeling of fatigue, dislike of work, Dizziness, general fatigue, anorexia, painful body, nerveous prostration. anxiety and decrese of energy, and in oriental medicine dificiency of vital energy, general pain, sinking of vital energy(氣虛下階) in adequate nutrition, confusion and slow speaking.

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An Autoregressive Parameter Estimation from Noisy Speech Using the Adaptive Predictor (적응예측기를 이용하여 잡음섞인 음성신호로부터 autoregressive 계수를 추산하는 방법)

  • Koo, Bon-Eung
    • The Journal of the Acoustical Society of Korea
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    • v.14 no.3
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    • pp.90-96
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    • 1995
  • A new method for autoregressive parameter estimation from noisy observation sequence is presented. This method, termed the AP method, is a result of an attempt to make use of the adaptive predictor which is a simple and reliable way of parameter estimation. It is shown theoretically that, for noisy input, the parameter vector computed from the prediction sequence is closer to that of the original sequence than the noisy input sequence is, under the spectral distortion criterion. Simulation results with the Kalman filter as a noise reduction filter and real speech data supported the theory. Roughly speaking, the performance of the parameter set obtained by the AP method is better than noisy one but worse than the EM iteration results. When the simplicity is considered, it could provide a useful alternative to more complicated parameter estimation methods in some applications.

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The Cross Cultural Adaptation For Neck Disability Questionnaires (목 기능장애 설문지의 절충 문화 적응)

  • Lim Chang-hun;Lee Hae-jung;Bae Sung-soo;Kim Jin-sang
    • The Journal of Korean Physical Therapy
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    • v.17 no.2
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    • pp.46-66
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    • 2005
  • With the increase in the number of multinational and multicultural research projects, the need to adapt health status measures for use in other than source language has also grown rapidly. Most questionnaire were developed in English-speaking countries, but even within these countries, researchers must consider immigrant populations in studies of health, especially when their exclusion could lead to a systematic bias in studies of health care utilization or quality of life. The purpose of this study was to translate and and culturally adapt the three most used neck and spinal pain disability questionnaires - the Neck Disability Index(NDI), Neck pain and Disability Scale(NPDS), and Functional Rating Index(FRI) - into the korean language and evaluated their reliability, in addition to item response pattern, to achieve a good cross cultural adaptation. Each translated questionnaire was found to have high reliability (FRI ICC (2,1)=0.86 ($95\%$ CI: 0.75-0.92); NPDS ICC (2,1)=0.90 ($95\%$ CI: 0.83-0.95 ; NDI ICC (2,1) =0.90 ($95\%$ CI: 0.81-0.94)). The reliability of the translated versions of FRI, NPDS and NDI were excellent.

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Comparative Study of Make-up and Hair Styling Cultures of the King Jeongjo and the Edo Period (정조시대와 에도시대(江戶時代)의 화장문화(化粧文化)와 수발문화(鬚髮文化)의 비교 연구)

  • Kim, Min-Kyung
    • Korean Journal of Human Ecology
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    • v.18 no.1
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    • pp.189-200
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    • 2009
  • In the Edo period speaking of hair culture, common women wore decorative pigtail ribbons on the right, and twisted from side to side their tressed hair in such a manner as ungeunmeori and traemeori. Instead of gachae, common women used gogae made of their own hair, ungeunmeori on forehead, or jjokjinmeori at the back of head. During the Edo period, people women naturally exposed their necklines as a way of exposing their faces in the aesthetically ceremonial act of wearing make-up. As for lipsticks, they rouged extracts from red petals of safflowers mainly on their lips, and sometimes on their cheeks by blending this with white powder. Samurai families disliked women who wore thick lip makeup. In the latter period, women painted their necklines or foreheads black, applied a small amount of rouge on their cheeks thinly or thickly, and colored a reddish color into their fingernails by using petals and leaves of balsam flowers. Despite the chronological and spatial proximity of the King Jeongjo period and the Edo period, it was found that there were no similarities between two countries' cosmetic cultures. Moreover, it was discovered that current TV dramas were being produced, even not based on historical evidence in the Jeongjo period.

$\ll$영추(靈樞).동수(動輸)$\gg$에 대한 연구(硏究)

  • Jang, Dae-Won;Lee, Nam-Gu;Chae, U-Seok
    • Journal of Korean Medical classics
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    • v.12 no.2
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    • pp.294-315
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    • 1999
  • $\ll$靈樞 動輸$\gg$ explains the way that the Arm Greater um Lung meridian, the Leg lesser urn kidney meridian and the Leg Yang-Myong Stomach meridian are keeping incessant pulsation, and the relation that these three meridians transport ant irrigate around the whole body. And also, when the meridian lines have been obstructed, the ki travels via shortcuts, in the course of spreading outer ki and inner ki around the whole body. Concretely speaking, in the first mapter it is explained the way that the Arm Greater urn Lung meridian pulses incessantly, in the second chapter, it is explained the way that the Leg Yang-Myong stomach meridian pulses incessantly, in the third chapter, the Leg Lesser urn kidney meridian pulses incessantly and in the fourth chapter, the movement of inner and outer ki are explained. But this chapter has many ancient letters and many parts omitted, so it is too hard to understand directly. Therefore we set to work with the view of helping to understand the original text more accurately by the reference of several editions and many commentarists' fruitful researches.

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