• Maxillofacial Plastic and Reconstructive Surgery
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• 제33권3호
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• pp.256-263
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• 2011

Purpose: The purpose of this study was to evaluate the effectiveness of autogenous tooth graft materials after maxillary sinus bone grafts. Methods: The study involved 23 implants in 22 patients who visited the Department of Oral and Maxillofacial Surgery and the Department of Periodontics, Chosun University Dental Hospital, in 2008 and received autogenous tooth graft materials for maxillary sinus bone grafts. Results: For eight patients with maxillary bone graft materials prior to implant placement, the healing period averaged five months. For eleven patients with simultaneous maxillary bone graft and implant placement, eight patients received a second surgery, with an average healing time of six months. Three patients had a longer observation period with only a fixture implanted. Three patients who received only a bone graft required more time to implant placement because of the lack of residual bone and also for personal reasons. Only 5 patients had biopsies performed and complications such as infection and dehiscence healed well. The application of autogenous graft materials to the maxillary bone graft sites did not exert any significant effects on the success rates. When a mixture of graft materials was used, the post-surgical bone resorption rate was reduced. Histological analysis showed that new bone formation and remodeling were initiated during the three-to-six month healing period. Bone formation capacity increased continuously up to six months after the maxillary bone graft. Conclusion: According to this analysis, excellent stability and bone-forming capacity were seen in cases where autogenous materials were used alone or mixed with other materials. Autogenous tooth graft materials may be substituted instead of autogenous bones.

• 복식
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• 제52권5호
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• pp.145-154
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• 2002

1. The blended tabby whose warp and weft each employs a different kind of thread had been weaved since the era of the Three Kingdoms in this nation and since the period of Han in China. Especially in the 15th century. very finely weaved fabrics as the specialty of Chosun were exported to China. In the 16th century. blended tabby weaved with silk and cotton were often used for clothes as cotton was produced around the nation. And in the 17th century. blended tabby employing high quality Chinese raw silk other than existing ones were weaved. 2. It has been found in literature review that Honpo, one of Chosun's blended tabby. was manufactured mainly in Hamkyung, Cholla and Kyungsang provinces and mostly distributed through markets of Chungchong and Cholla provinces. 3. Out of the total 19 fabric pieces. 13 employed silk thread as the warp and cotton thread as the weft. Compared with the weft. in general. the warp is given more tension when weaved and more friction by spindles, being more likely to be twisted than the weft. In addition to starching, a stronger thread is requested as the warp. It is natural that in the Chosun period, silk thread more stronger than cotton thread was used as the warp to make more durable fabrics. For the weft requiring lots of threads when weaved. cotton thread was mainly used in the 17th century because the thread could be easily obtained at that time. 4. So far the study has made an empirical review of Chosun's blended tabby. especially those of the 15th∼17th century, in terms of their production and distribution. Findings from the study have some limit because they have been made focusing on the 15th∼17th century not the whole period of Chosun. Therefore it is needed to complement those findings through further studies.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제29권2호
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• pp.79-85
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• 2003

The purpose of this study is to observe histopathologic changes in the bilateral craniomandibular joints after allowing 6 weeks of consolidation by varying the amount of distraction in rabbit mandible. Eight rabbits weighing about 2 to 3 kg were used. After corticotomy was performed on the left mandibular body between the first premolar and the second premolar region, a unilateral fixation device was placed. Then, a 7-day period was allowed without distraction of the device. The mandible was lengthened 0.5 mm/day. Corticotomy and lengthening of mandible were not performed in control group. After the completion of the lengthening process, a 6-week-consolidation period was allowed. Then, the rabbits were sacrificed, and histologic examination of the craniomandibular joints was performed. Proliferative changes were observed in the craniomandibular joints in all groups. With the increasing amount of distraction, hypertrophy of the cartilage layer became more severe, bone formed was dense and enchondral ossification was clearly shown in subchondral bone. Hypertrophy of the cartilage layer was also seen in the non-distracted side as the distracted side in the experimental group. These results indicate that when physical force is applied constantly to joints, the proliferation of articular cartilage and bone formation are present. When more than 6 weeks of consolidation period is allowed at the time of performing distraction for more than 5 mm, articular changes, especially, in the contralateral side should also be noted.

• 한국의상디자인학회지
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• 제8권1호
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• pp.97-110
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• 2006

The value that evaluates ancient Oriental civilization and culture is Hwa-i-kwan(華夷觀: the view that China is only good country and the others are savages) as Confucianism. Generally, Hwa-i-kwan(華夷觀) includes cultural Hwa-i-kwan(華夷觀) as Confucian culture is only superior, Han-centered racial Hwa-i-kwan(華夷觀), and country-centered geographical Hwa-i-kwan(華夷觀). As times goes on, instead racial and geographical Hwa-i-kwan(華夷觀) is diluted, cultural Hwa-i-kwan(華夷觀) was just emphasized. The value of cutural Hwa-i-kwan(華夷觀) is presented on dressing system and hair style becoming an issue in Confucian culture. This study intends to research how Hwa-i-ron in latter period of Chosun influenced the view of Ching men's hair style, pigtail. For this study, 5 books of Yeon-hang-rok in $17{\sim}18$ centuries are chosen, but some parts of them would be selected concerning with hairdressing and would be studied with other documents. Hwa-i-kwan(華夷觀) had dominated in the latter period of Chosun and had been making proprieties, then geographical and racial Hwa-i-kwan(華夷觀) were disappeared when Ching had been building a big cultural country, but cultural Hwa-i-kwan(華夷觀) had been stronger in latter period of Chosun than before, it had been a standard in all proprieties. After all, not only did cultural Hwa-i-kwan(華夷觀) become a standard of all proprieties in Chosun, but it was applied to the view of Ching men's hairstyle. So, people thought that pigtail, Ching men's hairstyle, is a custom of the savages. out of Chinese proprieties. Therefore, this cultural Hwa-i-kwan(華夷觀) that Chosun is a real China through taking over Chinese proprieties might be in that age.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 학술대회지
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• pp.612-615
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• 2004

A high-voltage generator is used to program the anti-fuse of the semiconductor chip. A new high-voltage generator consists of PN diodes and new stack type capacitors. An oscillator supply pulses to the high-voltage generator. The pulse period of the oscillator is delayed by controlling gate-voltage of the MOS. The pulse period is about 27ns, therefore the pulse frequency is about 37MHz. The threshold voltage of PN diode is about 0.8V. The capacitance of new stack type capacitor is about 4pF. The output voltage of the new high-voltage generator is about 7.9V and its current capacity is about $488{\mu}$A.

• 한국주거학회논문집
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• 제10권4호
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• pp.101-109
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• 1999

The Japanese style official residence were built by Chosun bank during the Japanese colonial period. The purpose of this study is to find out the architectural meanings of Chosun bank's official residence, its influences on Korean modem dwellings through trace of the original form and actual survey on the residence. We could understand influences of the rationality, also through the process of prototype's transformation and maintenance's change, we can know that the residence's modernizing process don't have the inflow onesidedly but the process of the collision and the assimilation to the differences between the residential sense and one's culture.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제18권4호
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• pp.771-777
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• 1996

This study was undertaken to access the effect of toothash combined with plaster of Paris in the filling of jaw defect and the substitution as new bone during the follow up period. We used the toothash and plaster after the cyst enucleation, the apicoectomy, the extraction of supenumerary tooth with ratio of 2 : 1 by weigh. 15 consecutive patients were evaluated retrospectively. Complications were swelling, perforation, infection and treated without problems using incision & drainage, aspiration, antibiotic treatment, 2ndary buccal flap. The follow-up period ranged from 28 to 35 months. Based on radiographic and clinical observation, it may be concluded that toothash and dental plaster of Paris($CaSo_4\;{\cdot}\;1/2H_2O$) are useful for bone substitute.

• 복식
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• 제25권
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• pp.269-284
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• 1995

This study investgates the significance of Chosun burial clothing in 15th to 17th Centuries by examing the costumes recorded in the ryesu (ritual books). Referring to description of the mouring-rit-ual in the the Kujoohryei(국조오례의), the sangryebiyo(상례비요), they exhibit little differ-ence in the ceremonial procedure, this implies that the the Jujagarye, the oldiest Chinese Ryesu, had influence on the manner of Chosun. The Kujoohryei(국조오례의) written-in 15th Century played a paramount role in domesti-cation of burial costume(염습의) which had been performed by the Jujagarye(주자가례), and the sangryebiyo(상례비요) etc written between 16th and 17th Centries promoted to genealize the mouring-ritual to the ordinery people. In the period, ryemsupui(염습의, clothing for the dead) is costumes for 'sup(습)', sofyum(소렴), and 'daeryum(대렴)' in the mourning ceremorial procedure, and for postliminal rites in the rites of passage. The reason of using clothing which they put on the dead's own daily clothing stands for eagerness for lasting life not only in this world but also in the other world.

• 한국주거학회논문집
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• 제18권4호
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• pp.69-78
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• 2007

This study is to describe the changes of spatial structure of Korean traditional housing in urban context with the following preconditions. Firstly, Chosun Hanyang's urban housing should be classified as it's own type. Secondly, Chosun's traditional housing accomplishes a complete urban housing type in Japanese colonial period through the stream of time. And the purpose of this study is as followings. First is to find out the process of changes of urban housing in urban context from the latter period of Chosun Dynasty to 1960's. Second is to find out the origin of spatial structure of urban house which is being kept throughout the above changes. Third is to find out the unique characteristics of urban house and the fundamental differences with folk houses in province.

• 대한가정학회지
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• 제11권1호
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• pp.92-106
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• 1973

Brief history of home economics education after modern period (GAEWHA-KI) (1900~1945). Education of home economics in our country is known to have been developed mainly through school education by need of women education. The first period is construed "from 1890's until before the conclusion of ULSABOHO treaty, which can be referred to as an inception of the education for home economics by including subjects of sewing and manual arts in the curriculum of EWHA-hakang. The second period is "from the conclusion of ULSABOHO treaty in 1905 until the act of higher education for women was decreed, transition of the education for home economics and major curriculum thereof and the text books of home economics are handled. The third period is "from the promulgation of CHOSUN education act in 1911 until the fall of Japan education of home economics in this period is described in terms of national education under the Japanese colonial rule. The education was first renewed by women missionaries with the onset of "blooming period (GAEWHA-KI)" and school education of home economics far educating women was initiated at EWHA-hakdang in 1896, in 1908, with the pronulgation of the act of higher education for women, major curriculum and subjects were set up and text books of home economics were also compiled. In accordance with CHOSUN education act in 1911, housekeeping and sewing subjects at secondary school were taught 10 hours a week with the emphasis on general education and practical subject oriented training. Home economics under the Japanese rule was so educated as to imbue, students with the sense of nationality by teaching Korean custom and family habits.