• Journal of Ginseng Research
• /
• 제19권1호
• /
• pp.73-76
• /
• 1995

Newly sprouted American ginseng (Panax quinquefolium L.) seedlings were transplanted to forest pots with mycorrhizae-infested soil and grown in screenhouse for 2 years. Growth patterns, mortality rate and fresh root weight were investigated. Plants in VAM soil had lower mortality rales than control. In soils infested with two species of mycorrhizal fungi (Glomu deseyicola, frappe, Bloss and Merge and G. intraradices, Schenck and Smith), 28-35% of plants produced 3-prongs in the second season and significantly increased fresh root weight by 41 to 43%.

• Educational Technology International
• /
• 제9권1호
• /
• pp.25-47
• /
• 2008

The purpose of this study is to investigate online school students' understanding of going to online school and their recognitions of the differences between online schools and brick and mortar schools/homeschool. A qualitative research was conducted with an 8^th grade teacher and sixteen 8^th grade students at an American online school. The findings of this study can be an important first step toward an in-depth understanding of online school learning environments.

• 대한치과교정학회지
• /
• 제17권2호
• /
• pp.199-213
• /
• 1987

Upon analyzing the literature, it becomes apparent that norms for orthodontic diagnosis were from normal occlusion with pleasing face, and that the form and size of craniofacial skeleton were different between racial or ethnic groups. Therefore, this study was intended to establish Korean adult norms be useful for diagnosing the cases and to compare those to other ethnic or racial groups. Lateral cephalometric radiographs were taken of ninety-one Korean adults with normal occlusion showing pleasing face consisted in forty-three males and forty-eight females. The subjects ranged in age from seventeen to twenty-six years. The tracings involved measurements that were analyzed with a digitizer. The findings of this study can be summarized as follows, 1. Norms of Korean adult males, females, and combined sexes were established. 2 It was found that in the form and shape of craniofacial skeleton, there were no significant differences between males and females, but in the size males were larger than females 3. There were a great variation between ethnic or racial groups in the measurements of craniofacial skeleton 4 The size of Korean cranial base was smaller than the American Caucasian. 5 The maxilla and mandible of Korean were less protruded than those of the other ethnic groups 6 The dental pattern of Korean were more proclined than that of the American Caucasian and less protruded than that of the American Negro and the North Indian.

• 대한치과의사협회지
• /
• 제53권11호
• /
• pp.870-885
• /
• 2015

This article discusses accomplishments and historical implications of American missionary dentist W.J. Scheifley and the first Korean dental department, which was established in 1915 in Korea. W.J. Scheifley, with Christian service mind and mission as a dentist, applied to American Protestantic missionary dentist overseas. The dental department in the Severance Union Medical College introduced the scientistic dental education of America, facilitated research on the dental condition of the Korean people, and ran independent dental clinic. W.J. Schiefley criticised the profit-seeking attitude of Japanese dentists and denturist(="IPCHISA", in Korean pronunciation) and emphasized on the significance of Oral Health. He did all kind of dental treatments with advanced equipments like X-ray machine, and managed the collective oral health care for missionaries overseas. He trained medical students and assistants of the dentists with the goal of producing Korean dentists, but he failed due to the Dentist law introduced by Japanese colonial administration that interfered with producing Korean dentists. However, O.R. Avison's proposal of the establishment of dental schools stimulated the establishment of Kyungsung dental school, which provided the basis for the Dental department in the Severance Union Medical College becoming special training institution for Korean Dentists.

• 말소리와 음성과학
• /
• 제5권3호
• /
• pp.11-20
• /
• 2013

The purpose of this study is to compare the acoustic parameters of English stop consonants at the initial and after-initial-/s/ positions in a message produced by 47 Korean and American speakers in order to provide better pronunciation skills of English stops for Korean learners. A Praat script was developed to obtain voice onset time (VOT), maximum consonant intensity (maxCi), and rate of rise (ROR) from six target words with stops at the positions in the message. Results show that VOT and maxCi were significantly different between the two language groups while ROR wasn't. The Korean speakers generally produced the stop consonants with longer VOTs and higher consonant intensity. From the comparison of consonant groups at the two different positions, the Korean participants did not distinguish them as clearly as the American participants did at the after-initial-/s/ position. Finally a comparison of each language and sex group revealed that the major difference was attributed to stop consonants in the after-/s/ position. The author concluded that Korean speakers should be careful not to produce all the stops with longer VOTs and higher intensity. Further studies would be desirable to examine how Americans evaluate Korean speakers' English proficiency with modified acoustic values of English stops.

• 인재니움
• /
• 제14권4호
• /
• pp.17-20
• /
• 2007

• 터널과지하공간
• /
• 제6권2호
• /
• pp.184-187
• /
• 1996

• 도서관문화
• /
• 제32권6호통권271호
• /
• pp.36-41
• /
• 1991

• 대학교육
• /
• 통권117호
• /
• pp.105-112
• /
• 2002

• 건축사
• /
• 통권629호
• /
• pp.116-120
• /
• 2021