Conceptual Study for Tissue-Regenerative Biodegradable Magnesium Implant Integrated with Nitric Oxide-Releasing Nanofi bers

Jin‑Kyung Jeon,Hyunseon Seo,Jimin Park,Soo Ji Son,Yeong Rim Kim,Eun Shil Kim,Jong Woong Park,Woong‑Gyo Jung,Hojeong Jeon,Yu‑Chan Kim,Hyun‑Kwang Seok,Jae Ho Shin,Myoung‑Ryul Ok 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.4

The excessive initial corrosion rate of Mg is a critical limitation in the clinical application of biodegradable Mg implantsbecause the device loses its fi xation strength before the fractured bone heals. This study suggests a new approach to overcomethis hurdle by accelerating tissue regeneration instead of delaying the implant biodegradation. As angiogenesis is anessential process in early bone regeneration, a Mg implant coated with electrospun nanofi bers containing nitric oxide (NO),which physiologically promotes angiogenesis, is designed. The integrated device enables adjustable amounts of NO to bestored on the NO donor-conjugated nanofi ber coating, stably delivered, and released to the fractured bone tissue near theimplanted sites. An in vitro corrosion test reveals no adverse eff ect of the released NO on the corrosion behavior of the Mgimplant. Simultaneously, the optimal concentration level of NO released from the implant signifi cantly enhances tube networkformation of human umbilical vein endothelial cells without any cytotoxicity problem. This indicates that angiogenesis canbe accelerated by combining NO-releasing nanofi bers with a Mg implant. With its proven feasibility, the proposed approachcould be a novel solution for the initial stability problem of biodegradable Mg implants, leading to successful bone fi xation.

(연구논문) 1930~40년대 부산화단의 성립연구-일제의 동화정책과 부산 화단의 대응을 중심으로-

배진영 ( Jin Yeong Bae ) 부산광역시 시사편찬위원회 2014 항도부산 Vol.30 No.-

전시체제기의 부산미술에 대한 연구는 주로 서양화의 도입과 정착에 중점을 두고 진행되었다. 그 선구적 역할을 한 것은 부산의 판화가이자 미술사가인 이용길이었다. 이후 옥영식과 강선학, 김철효 등이 부산미술사를 정리했으며 학위논문으로 이진철과 이동우 등의 연구가 있다. 이상의 연구들에서는 해당 시기의 중앙화단의 움직임과 분리됨은 물론 당시의 역사적 상황을 제대로 담지 못하고 서술되었다는 점에서 아쉬움이 있다. 또한 미술을 비롯한 한 시대의 문화는 그 당시의 역사적 경험을 반영하는 것이므로 그 시대의 미술을 파악하는 것 역시 역사적 관점과 연결해야 함에도 기왕의 연구에서는 이 부분에서 큰 취약점을 지닌다. 따라서 본 논문은 상기의 문제점을 염두에 두고 일제 강점기, 특히 부산 지역에서 ‘근대 미술’이 본격적으로 뿌리를 내리고 싹을 틔우기 시작했던 1930년대 ~ 1940년대, 즉 전시체제기를 ‘역사적 관점’에 바탕을 두고 살펴보고자 했다. 이 때 연구의 대상은 조선미술전람회(이하 조선미전으로 줄임.) 입선 작가를 중심으로 살펴보았으며, 이를 통해 해당 시기의 작품들이 일제의 동원정책에 어떻게 대응했는지를 알아보고자 했다. 그 결과, 처음에 연구 과제로 제시했던 문제에 다음과 같은 답을 내렸다. 우선 중앙화단의 모더니즘적인 흐름에 비해, 부산지역의 화단은 독자적인 향토적이고 조선적인 방향을 추구했다는 것을 구체적으로 진술하였다. 또한 부산의 화단은 당시 일제와의 관계 속에서 때로는 그들의 내선일체 정책이나 황국신민화 정책 등의 동화정책의 영향을 받아, 일부는 그에 조응하여 추종하기도 했지만, 동시에 일부는 그와 다른 방향을 추구하기도 했다는 것이다. 전자의 예로서 이 글에서는 임응구의 작품을, 후자의 그것으로는 양달석과 서진달의 예로 들었다. 그리고 이를 통해서 당시 일제의 동화정책이 단일한 경로를 통해서 이루어진 것이 아니며, 이에 대한 부산화단의 대응 역시 획일적으로 이루어지지 않았음을 구체적으로 진술 하였다. 이 연구는 선배 연구자들이 시도했던 부산 미술사 연구를 역사적 관점에서 재조명하고, 이를 바탕으로 부산 지역의 역사를 풍부화하려는 시도의 출발점에서 쓰인 바이다. 그렇기에 그 내용과 사료에 있어 좀 더 많은 보충이 필요할 것이다. 하지만 이 시도가 지속적으로 이루어져 바라는 바의 성과를 거둔다면, 단순히 지역사의 확충이 아니라 한국사 전체의 귀중한 자산이 될 수 있을 것이라 생각 한다. The organization of Busan artist group in 1930`s-1940`s. The focus is on Japanese attempts at assimilation and countermeasures of the Busan artist group. The study of Busan arts in the period of the war, where a system is processed which is focused on introduction and settlement of western painting. The pioneer of Busan art history is Lee Yong-gil who was a printer and art historian. After, the history of Busan art is studied by Ok Young-sik, Kang Sun-hak and Kim Chul-hyo. Others include Lee Jin-chul and Lee Dong-woo who wrote down the study of Busan art history. The above studies are separated and described as follows. It is between the Central Artist group movement and the Busan Artist group movement. It is impossible to describe the historical situation in those days. The contemporary arts is reflect historical experience at that time. Hence, we need an historical view to understand the above contemporary arts. But previous studies have weak points regarding this point. So, I think of the weak points in the previous study. The Modern arts in Busan area of Japanese colonial era were started. At that time between the1930`s and 1940`s. I studied the Busan arts in their historical view. I have focused on the study of the winning artists in the Joseon Art Exhibition. Through this paper, I tried to study the countermeasure of works of that time about Japanese Mobilization Policy. After a while, I found this answer. Above all, I specified and described that the Central artist group had Modernism stream, but the Busan artist group had local color and Joseon color. At that time, the Busan artist group has relationships with Japan policy. And, they have influenced by the Nae-son-il-che and the subject of the Emperor of Japan`s consciousness. After reading, one part followed Japanese policy and the other part followed a different way. According to this study, one part is the works of Yim Eung-gu and the other part is the works of Yang Dal-seok and Seo Jin-Dal. And, through this study, I described not only the assimilation of Japan in various channels but also the countermeasures of the Busan artist group. I think that this paper is revisited by the study of Busan art history in an historical view. I wrote this paper because my target was to extend the history of Busan religion. So, I need to study more and look at further historical records. But if I accomplish the target, I assure you that not only will it extend Busan history but also valuable, wider Korean history.

지역4-H조직의 내적 적합성에 관한 문화기술적 연구

김진모,김진군,전영욱,이정은,최영창,이은영 한국농업교육학회 2008 농업교육과 인적자원개발 Vol.40 No.2

이 연구의 목적은 지역4-H조직의 내적 적합성을 탐색하고 이를 기술하는데 있었다. 2006년 8월부터 10월까지 약 3개월 동안 지역4-H후원회 회장 및 임원진 3명, 지역4-H연맹 회장 1명, 학교4-H 지도교사 4명, 지역의 영농4-H회장 1명, 시·군 농업기술센터 소장 및 4-H담당자 9명을 주요 연구 참가자로 하여 심층면담을 통해 자료를 수집하였다. 수집한 자료를 분석한 결과는 다음과 같았다. 첫째, 지역4-H조직 관련자들이 인식하는 지역4-H조직의 주요성과 격차로, ① 민간4-H조직을 중심으로 한 자율적이고 독립적인 활동 부재, ② 지역4-H조직 간 다양한 종류의 협력 부재, ③ 지역사회에서 4-H활동에 대한 가치 인식 부족이 나타났다. 둘째, 지역4-H조직의 핵심 과업으로 ① 4-H의 가치 및 이념에 부합하고, 지역의 실정에 맞는 프로그램 확보, ② 지역4-H 조직 간 협력적 네트워크 확립, ③ 4-H에 대한 지역사회의 관심 및 지지 확보가 나타났다. 셋째, 지역4-H조직의 내적 부적합성으로는 ① 인원 확보의 어려움과 핵심과업에 대한 전문성 결여, ② 관료화되고 경직된 낡은 문화, ③ 조직적 자원의 축소 및 조직 간 낮은 네트워크의 수준이 도출되었다. The purpose of this study was to describe and understand internal fit in Local 4-H Organization. The main participants of this study were one leader and two members of Local 4-H Society for the support, one leader of Local 4-H Association, four School 4-H teacher, one leader of Local farm 4-H, 9 local agricultural extension workers. The data were collected through in-depth interview with them from August, 2006 to October, 2006. The Results from this study were as follow: 1. Key performance gaps of local 4-H organizations were identified: ① lack of local 4-H based activities, ② lack of various types of partnership between local 4-H organizations, ③ lack of understanding value of 4-H activities in the communities. 2. Key tasks of local 4-H organizations were identified: ① developing local 4-H programs based on 4-H's values and ideas, ② establishing the cooperative networks among local 4-H organizations, ③ ensuring the interest and support about 4-H in the communities. 3. Internal misalignments of local 4-H organizations were identified: ① difference of recruitment and lack of expertise, ② bureaucratic and rigid cultures, ③ decrease in organizational support and low level of network among organizations.

경막 내 colistimethate 투여로 치료한 다제 내성 cinetobacter baumannii 뇌실염

홍유아,유진홍,김진진,모은영,안건희,정희경,김진석,이현정,정미향,윤승배 대한감염학회 2009 감염과 화학요법 Vol.41 No.4

Acinetobacter species is a non-fermentative aerobic gram-negative coccobacillus that is an important pathogen found in nosocomial infections. Recently, multi-drug resistant Acinetobacter baumannii (MDR-AB) infections have been increasing and pose a serious problem. Most such infections present as bacteremia, pneumonia, or a wound infection; however, CNS infections are very rare. We herein present a case of ventriculitis caused by MDR-AB in a 37-year old man after a neurosurgical intervention. The patient was successfully treated with intrathecal colistimethate.

UNICOS운영체제에서의 한글 쉘에 관한 연구

진성일,조영욱,김용걸 충남대학교 1991 忠南科學硏究誌 Vol.18 No.2

Shell is a program that executes under the UNICOS operating system and is a command interpreter-the gateway to other programs and utilites running under UNICOS which is operating system of CRAY-28.

球狀黑鉛鑄鐵의 機械的 性質에 미치는 合金元素와 熱處理의 影響

陳永喆 全北大學校 1989 論文集 Vol.31 No.-

The aim of this study is to find out how the alloying elements and heat treatment affect the mechanical properties in ductile cast iron. The alloying elements added are 1% of Ni and 0%, 0.12%, 0.25% of Mo. The samles(as cast and ferritized) are austenitized for 1 hr. at 900℃, austempered for 50 to 1500sec. at 385℃, and quenched into iced water. The results of this study are as follows ; 1. The grain size become finer with increasing Mo. In impact fracture surface of as cast sample river pattern decreases and dimple pattern appears partially with increasing Mo, and in case of ferritized sample fabrous pattern and dimple pattern are showed. 2. Hardness and impact value are increased with increasing Mo. The more volume fraction of bainite and retained austenite, the more impact absorbed energy increased after austempering heat treatment. The transition temperature lowers with increasing Mo.

素月詩의 硏究

陳榮煥 大田工業高等專門學校 1969 論文集 Vol.4 No.-

Many people have dealt with Sowol's poetry, which I'm interested in, and I have tried to analyze and study the form and matter of Sowol's poetry, not to mention the trend of the times of his days, so that his poems can be understood and evaluated with accuracy. My elaborate study shows that Sowol's poetry has been much devoted to the development of modern literature as regular poetry ballad poetry, and popularized poetry. In addition to the above, however, I have come to the conclusion that it is one of the faults that poetic image is lacking in his poetry from the viewpoint of modern poetry, and Sowol, as a poet, was short of his feeling of historical mission. Finally, it is my opinion that Sowol's poetry plays a great part in converting modern poetry, which in exclusively occupied by the upper classes because of its difficulty, into that of people.

Failure Cost와 Life Cycle Cost를 고려한 연속시스템에 대한 최적 장치 선택에 관한 연구

진상화,김용하,송희열,여영구,김인원 한국안전학회 2004 한국안전학회지 Vol.19 No.4

In this study, the required life cycle cost is evaluated in consideration of the equipment's availability during its life cycle. In order to meet the maximum availability required by the process, the failure cost and life cycle cost is assessed, The optimal equipment selection method is presented according to the analysis of the failure cost and life cycle cost. For the systems in which equipments are connected serially, the optimal equipments are selected by minimizing the life cycle cost and satisfying the required system availability goal. In addition, the selection methods and life cycle cost are analyzed according to the cost variation of the equipment. By using the life cycle evaluation procedure, the failure cost and maintenance cost needed during the life cycle of the equipment can be presented.

Austempering에 의한 CV黑鉛鑄鐵에 미치는 바나듐의 影響

陳永喆 全北大學校 1988 論文集 Vol.30 No.-

逆機能家族治療를 위한 査定要因에 관한 硏究

진영석 慶南專門大學 1998 論文集 Vol.26 No.1