• The korean journal of orthodontics
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• v.41 no.5
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• pp.354-360
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• 2011

Objective: To investigate the effects of different pilot-drilling methods on the biomechanical stability of self-tapping mini-implant systems at the time of placement in and removal from artificial bone blocks. Methods: Two types of artificial bone blocks (2-mm and 4-mm, 102-pounds per cubic foot [102-PCF] polyurethane foam layered over 100-mm, 40-PCF polyurethane foam) were custom-fabricated. Eight mini-implants were placed using the conventional motor-driven pilot-drilling method and another 8 mini-implants were placed using a novel manual pilot-drilling method (using a manual drill) within each of the 2-mm and 4-mm layered blocks. The maximum torque values at insertion and removal of the mini-implants were measured, and the total energy was calculated. The data were statistically analyzed using linear regression analysis. Results: The maximum insertion torque was similar regardless of block thickness or pilot-drilling method. Regardless of the pilot-drilling method, the maximum removal torque for the 4-mm block was statistically higher than that for the 2-mm block. For a given block, the total energy at both insertion and removal of the mini-implant for the manual pilot-drilling method were statistically higher than those for the motor-driven pilot-drilling method. Further, the total energies at removal for the 2-mm block was higher than that for the 4-mm block, but the energies at insertion were not influenced by the type of bone blocks. Conclusions: During the insertion and removal of mini-implants in artificial bone blocks, the effect of the manual pilot-drilling method on energy usage was similar to that of the conventional, motor-driven pilot-drilling method.

• Korean Security Journal
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• no.28
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• pp.131-152
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• 2011

Jangyongyoung was a royal guard in the King Jeongjo Period. The guard was established after the inauguration of King Jeongjo to protect the king and strengthen the royal authority. In terms of security study, it has high value in that it gives insights to the development of security system and its achievements and new role of supporting king's cultural events. Jangyongyoung was a formal guard established to achieve king's political reform. After the King Injo restoration, there sprouted many security guards, including Howicheong, Eoyounggun, and Gemgun. Those were all makeshift systems. But Jangyongyoung grew as a standing and futurist system as it went through some different names, Sukwiso, Jangyongwi, and finally Jangyongyoung. It served to protect the legitimacy of King's succession, to strengthen royal authority, and to bring stability to people's lives. Jangyongyoung had an efficient organization and operation. It also had the characteristics of modern security, integration, professionalism and size. In Jangyongyoung, military training and security were not separate. They protected king from dangers and guarded king's bed, and they trained themselves to deal with unforeseen occurrences. By doing so, they could support king's many activities, including visit to royal tombs, touring of Hwaseong Fortress, and watching military training. Jangyongyoung not only served as a military guard but also it had a cultural function. They made it possible that king and people met in the king's procession. Jangyongyoung supported Jeongjo's political reform, and as a royal guard it enhanced the authority of royal family and exemplified a new security guard by supporting king's cultural events where king, servants and people could become one.

• Korean Security Journal
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• no.16
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• pp.229-241
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• 2008

he guarding system of the "Choson" era is completed by the Gyeongguk-daejeon(an administrative canon) at the kings "Sejong" and "Yejong", and it is supplemented at the King "Seongjong". "Geum-gun" is composed of "Naegeum-wi", "Gyeombok-sa", "Wirim-wi" and "Jeongro-wi" in the period before the Japanese Aggression of Korea in 1952, and in the period after the aggression war, the organization of the "Geum-gun" is changed repeatedly according to circumstances in the period after the aggression. They("Geum-gun") devote themselves to the protection of kings and the capital defense in the first period of the "Choson" era. The most important change of the "Geum-gun" is the practice of five military units system, three military units of them, "Hunryeon-dogam", "Eoyeong-cheong" and "Geumwi-yeong", take charge of the guard of kings and the capital defense, and "Chongyung-cheong" and "Sueo-cheong" take charge of the defense of the outer areas of the capital region with key positions located at "Namhan-sanseong" and "Bukhan-sanseong"(mountain fortress Walls). The function of the "Geum-gun" is extended through the aggressions, therefore the number of soldiers is increased greatly. The guarding system for the country and its royal family is frequently changed according to the improvement of the people's position with themselves-awakening and their understanding of realities. The reorganization of the "Geum-gun" including "Howi-cheong", "Geumgun-cheong", "Sukwi-so" and "Jangyong-yeong" is unavoidable to strengthen the royal rights that are weaken by deposing the king "Injo". The standing of the existing organizations is changed many times with financial problems. The enthronement of the king "Jeongjo" is a great epoch in the change of the guarding system.

• Journal of Chest Surgery
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• v.34 no.6
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• pp.465-471
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• 2001

Background: Hypothermia protects the brain by suppressing the cerebral metabolism and it is performed well enough before the total circulatory arrest(TCA) in the operation of aortic disease. Generally, TCA has been performed depending on the rectal or nasopharyngeal temperatures; however, there is no definite range of optimal temperature for TCA or an objective indicator determining the temperature for safe TCA. In this study, we tried to determine the optimal range of temperature for safe hypothermic circulatory arrest by using the intraoperative electroencephalogram(EEG), and studied the role of EEG as an indicator of optimal hypothermia. Material and Method: Between March, 1999 and August 31, 2000, 27 patients underwent graft replacement of the part of thoracic aorta using hypothermia and TCA with intraoperative EEG. The rectal and nasopharyngeal temperatures were monitored continuously from the time of anesthetic induction and the EEG was recorded with a ten-channel portable electroencephalography from the time of anesthetic induction to electrocerebral silence(ECS). Result: On ECS, the rectal and nasopharyngeal temperatures were not consistent but variable(rectal 11$^{\circ}C$ -$25^{\circ}C$, nasopharynx 7.7$^{\circ}C$ -23$^{\circ}C$). The correlation between two temperatures was not significant(p=0.171). The cooling time from the start of cardiopulmonary bypass to ECS was also variable(25-127min), but correlated with the body surface area(p=0.027). Conclusion: We have found that ECS appeared at various body temperatures, and thus, the use of rectal or nasopharyngeal temperature were not useful in identifying ECS. Conclusively, we can not fully assure cerebral protection during hypothermic circulatory arrest in regards to the body temperatures, and therefore, the intraoperative EEG is one of the necessary methods for determining the range of optimal hypothermia for safe circulatory arrest. :

• Journal of Chest Surgery
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• v.39 no.4 s.261
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• pp.298-303
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• 2006

Background: This study was performed to investigate the outcomes of vascular operations that were done in patients with atheroscerosis obliterans (ASO) of lower limb. Material and Method: Forty patients underwent vascular operations from December 1996 to June 2004. The patient's records were analyzed retrospectively. Mean age was $66{\pm}8$ years (range, $47{\sim}81$ years). Gender ratio was 37:3 (male:female). Result: The operations were done on 50 lower limbs of 40 patients. The names of operations were femoropopliteal bypass in 12 patients (30%), femorofemoral bypass in 12 (30%), femorofemoral bypass and femoropopliteal bypass in five (12.5%), aorta-lower limb artery bypass in five (12.5%), axillofemoral bypass in two (5%), iliopopliteal bypass in two (5%), and endarterectomy in two (5%). All bypass surgeries were done with prosthetic conduits. Mean follow up period was $33.2{\pm}23.2$ months (range, $3.8{\sim}90.2$ months). The cumulative patency rates of 1 and 5 years were 75.5 and 58.7% respectively. In six patients, amputation of the lower limb was done. In eight patients, 12 complications occurred. After the first operation, 10 patients underwent reoperations. Conclusion: Our lower limb arterial bypass surgery revealed acceptable patency rate, but not a few patients required reoperations. An epochal treatment modality that can inhibit the progress of ASO and improve long term patency should be established.

• Journal of Chest Surgery
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• v.29 no.11
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• pp.1182-1190
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• 1996

The best treatment of congenital or acquired tracheal stenosis is resection and end to end anastomosis. Various prosthetic material and tissue graft replacement can be considered when the stenotic segment is too long, but their uses are still limited due to many serious complications. The present study examined the effect of immunosuppression and cryopreserved allograft trachea after intraperitoneal omental implantation for evaluation of the possibility of tracheal transplantation. Thirty tracheal segments were harvested from fifteen donor Wistar rats. Among them eighteen segments were implanted immediately(group I, II, III) and twelve segments were used for cryopreservation(group IV, V). Heterotopical intraperitoneal implantation was performed in five groups of rats(n=6); Group I was Wistar syngeneic controls and received no immunosuppression. Group II and III were those of Sprague-Dawley recipients, the former receiving no immunosuppression and the latter receiving immunosuppression(Cyclosporin A 15mg/kg/day, Methylprednisolone 2mg/kg/day). Group IV and V were groups of Sprague-Dawley recipients, the former receiving immunosuppression and the latter receiving no Immunosuppression. After 28 days, rats were sacrificed and the tracheal segments were histologically evaluated. Epithelial thickness was significantly decreased in group II, IV. Epithelial regeneration score was also significantly decreased in II. All rats maintained well their round tracheal contour. In conclusion; I) trachea could be preserved for a long time with cryo method, 2) epithelium could regenerate fully with omentopexy in cryopreserved trachea, 3) immunosuppresion was not necessary with cryopreserved trachea.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.38 no.3
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• pp.75-82
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• 2020

Heungseon Daewonwang Lee Ha-eung was the father of King Gojong, who appointed as Daewongun in December 1863. On February 2, 1898, after the death of Heungseon Daewongun, he was buried in the Asodang in Gongdeok-dong, Mapo-gu, where he normally enjoyed. On August 24, 1907, he was promoted to Daewonwang. After being promoted to Daewonwang, the Asodang tomb was relocated to Daedeok-dong, Paju, and the tomb was promoted to Won. In the Wonchim space promoted to the facilities suitable for the original were created, and through this, it was possible to analyze the characteristics of the Wonchim and the Wonchim space of the tomb on the Heungwon. In addition, by comparing and analyzing the spatial composition between Myo and Won, it was possible to derive the spatial composition characteristics of the Joseon Dynasty Won(園), and Myo(墓). Looking at the research results derived through the analysis of 『Heungwon Cheonbong Registration』, tomb of Heungseon Daewongun, located in Asodang, Mapo-gu, was promoted to Heungseon Daewonwang, and was relocated as Jangneung in Uncheon-ri, Paju, the former tomb of King Injo. The promoted of tomb was also promoted from Myo to Won. In addition, the storehouses and facilities used in Mapo Asodang were moved to Uncheon-ri, Paju, and reused. Newly constructed monuments, Biseog, Chimgak, Jemulgo, Subokcheong, Hongsalmun, and Wells according to the promoted of the Won. It was confirmed that there is a difference in the spatial composition of Won and Myo when looking at the difference in the composition of the ornament objects and the facility.

• Journal of Korean Philosophical Society
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• v.105
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• pp.149-192
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• 2008

추파(秋坡) 송기수(宋麒壽)(1507-1582)는 500년 전에 출생하여 조선시대 중종, 인조, 명종, 선조의 4대에 걸친 75세를 일기로 생존했던 재조(在朝)의 선비로서 행정가요, 또한 학인이었다. 추파는 기묘사화의 참상을 직접 목도하고 본의 아니게 위훈이 하사되어 평생 마음의 질곡이 되었고, 또한 소위 양재역 벽서사건에 연루된 종형 규암(圭菴) 송인수(宋麟壽)를 구명(救命)하지 못한 그의 처신이 또한 역사 속에서 오해의 사단(事端)으로서 추파에게 큰 굴레로 작용되었다. 추파의 현실인식은, 사화로 사림이 사기저상되었고, 그로 인해서 치도와 강상이 붕괴되었으며, 재해가 출현하고, 민심의 흐트러짐이 모두 천명의 노여움으로 본 동시에, 그 처방을 요순지치인 치도(治道)를 확립할 것, 선진 성학으로서 학문을 진흥할 것과 그 실천 주체인 선비의 기상을 진작시킬 것에서 찾았던 것이다. 추파의 성리설은 이기관계론을 부상리(不相離)라는 주제만을 채택하여 존재론적으로 접근하였고, 그 결과 율곡보다 훨씬 앞서 '리기지묘(理氣之妙)'라는 표현을 쓰면서 리발(理發)보다는 발어리(發於理)라는 말에 무게중심을 둠으로서 기발을 중심으로 말한 "기발어리설(氣發於理說)"을 제시하였다. 이것은 바로 그 뜻으로서의 천리(天理)를 밝혀 기(氣)로 발하는 구체적인 삶 속에 구현 하는 실천하는 길이 되는 것이다. 궁극적으로 추파의 학문은 바로 천리(天理)를 깨달아 실천궁행하여 가는 길로서 삶의 목표로 삼은 점이 특징적인 것이다. 즉 추파에 있어서 학문의 길은 리(理)의 본래적 뜻을 깨닫고 리(理)의 뜻을 심성의지(心性意志)를 통해서 구현하는 길인, 리(理)로 부터 발한 기발(氣發)을 몸소 역행실천(力行實踐)하는 길인 것이다. 이 길을 실제로 자신의 사명과 직결된 삶의 바른 길로 삼았던 것이다. 요컨대 추파의 학문사상의 궁극적 특징은 역행궁리(力行窮理)의 실천학에 있는 것이며, 따라서 결론적으로 사사(事事)(실사(實事))구시정신(求是精神)에 입각한 실천철학만이 그의 학문의 궁극적인 목적지가 되었던 것이다. 현실정치의 민생문제도, 역사적 이념으로서 선비정신 부양과 벽이단도 모두 이 사사구시(事事求是)의 시(是)를 통해야 되고, 이 시(是)를 통해서 구현하는 길이 추파학문사상의 궁극처인 것이다. 그리고 그의 언설과 삶 자체가 실사구시의 실천 그 자체 이었던 것이다. 학문사상사적으로 본다면 추파의 위상은 근본유학의 정신을 살려 그를 근간으로 하여, 한국 성리학의 개화기(開花期)에 새로운 개념으로서 이 기관계를 '리기지묘(理氣之妙)'라든가 발(發)의 근거를 리(理)에 두되 리(理)가 직접 발하는 것이 아니라, 발(發)하는 것은 기(氣)라는 '기발어리(氣發於理)'의 한길만을 중시한 점으로서 이기설의 새로운 문제를 제기한 점이라 할 수 있으며, 궁극적으로 기발론적(氣發論的)인 바탕에서 실천역행의 근거를 확립하게 됐다는 특징을 볼 수 있는 점이다. 또한 이것은 한국성리학의 기발일도라는 기발설의 선구적 주장이며, 또한 이(理)를 근거로 결국 사사구시(事事求是)의 경세실학(經世實學)을 제시함으로서 실학의 선구가 될 만한 문제제기(問題提起)를 했다고 평가할 만한 특징이라 하겠다. 이 연구가 그의 마음속에 얹혀져있던 멍에도, 그간 오해받은 역사적인 멍에도 벗겨질 수 있고, 한국철학사상장성기(韓國哲學思想長成期)(국유사상주류기(國儒思想主流期))의 학술사적인 위상도 바르게 드러나는 계기가 될 수 있기를 기대한다.

• Journal of the Korean Applied Science and Technology
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• v.38 no.4
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• pp.915-921
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• 2021

In this study, we designed pantothenic acid (PA) loaded solid lipid nanoparticles (SLNs) for enhanced skin penetration of PA that is used for moisturizing agent in cosmetics with hydrophilic property. SLNs were prepared using various lipids and surfactants. PA loaded SLNs were fabricated using double emulsion method. The fabricated PA loaded SLNs assessed particle size, polydispersity index, zeta potential, loading capacity. Skin penetration study was conducted using artificial skin tissue originated from human epidermis as one of the reconstructed human epidermis models. The mean particle size and zeta potential of SLNs ranged from 192.15 nm to 369.87 nm and -21.39 mV to -40.55 mV, respectively. The loading efficiency and loading amount of PA loaded SLNs were ranged from 44.36% to 57.16% and 12.60% to 16.36%, respectively. The results of penetration demonstrated that all SLNs improved PA skin penetration. In addition, the amount of PA from SLNs were approximately 3.8 - 8.8 times higher than that from PA solution. Therefore, the fabricated SLNs demonstrated the enhancment of skin penetration of PA. Particularly, the SLN, which used glyceryl behenate and Span 60, showed optimal skin penetration of PA.

• Korean Journal of Heritage: History & Science
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• v.49 no.4
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• pp.180-195
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• 2016

Since being designated as an important Intangible Cultural Property, Yeongsanjae has become recognized as a unique representation of Buddhist rituals in Korea. Following vigorous research in recent years, however, Suryukjae(水陸齋) was found to have been performed for a longer period and on a larger scale than Yeongsanjae, and under state leadership. This allowed researchers to move beyond the previous perspective that Yeongsanjae(靈山齋) lay at the center of many rituals. This study aims first to examine the origin and development of Yeongsanjae in Korea based on the literature, and then to discuss the meaning it holds today. Yeongsanjae was recorded as a ritual in Jineongwongong -published in 1496 during the early Joseon Dynasty- and also appeared in Yeongsandaehoejakbeopjeolcha -published in 1634(the 12th year of Injo's reign) in the mid-Joseon Dynasty and it was called Yeongsandaehoejakbeopjeolcha. It continued into the late Joseon Dynasty and it was called Yeongsanjakbeop or Yeongsandaehoejakbeop in the Ojongbeomeum collections(1661), CheonjimyeongyangSuryukjaeuiBeomeumsanbo collections(1721), and Jakbeobguigam(1826). In modern times, it has been called Yeongsanje in newspaper articles of TongnipSinmun (The Independent) and Yeongsanjae in Seokmunuibeom(1935). Nevertheless, the difference between the early Joseon Dynasty and subsequent periods is whether mourning of the spirit(唱魂) is added. In this regard, Yeongsanhoe in the early Joseon Dynasty mainly concerned Buddhist teachings realized through rituals such as sermon scenes of the Buddha. On the other hand, it was combined with Buddhist masses for the dead(追薦) from the mid-Joseon Dynasty and performed alongside with Buddhist teachings and prayers for the dead. Taking into account the seven-day Suryukjae, however, Yeongsanjae was performed daily during the day and mainly dealt with Buddhist teachings, while Buddhist masses for the dead were included when Yeongsanjae was performed independently.