Factors Affecting the Clinical Course of Subchondral Fatigue Fracture of the Femoral Head

Sunhyung Lee,Hee Joong Kim,Jeong Joon Yoo 대한정형외과학회 2023 Clinics in Orthopedic Surgery Vol.15 No.2

Background: Subchondral fatigue fracture of the femoral head (SFFFH) is a rare disease, and its disease entity is established in recent decades. Although there are a few studies on SFFFH, most of them are case series involving around 10 cases, and the clinical course of SFFFH is still not well known. This study analyzed the factors affecting the clinical course of SFFFH. Methods: Patients who visited our institution from October 2000 to January 2019 were retrospectively evaluated. Of eligible cases, 89 hips (80 patients) were diagnosed with SFFFH and non-surgical treatment outcomes were analyzed. Radiographs and medical charts were reviewed for following factors: the degree of femoral head collapse, the interval between the onset of hip pain and the first hospital visit, hip dysplasia, osteoarthritic changes, sex, and age. Results: Hip pain decreased in 82 cases (92.1%) through non-surgical treatment, and 7 cases (7.9%) underwent surgery. Patients with good results of non-surgical treatment had improvement 2.9 months on average after the treatment. All cases without a collapsed femoral head (55 cases) had hip pain alleviation through non-surgical treatment. Cases with femoral head collapse of 4 mm or less and non-surgical treatment within 6 months from the onset of hip pain (22 cases) all had hip pain alleviation. Among 8 cases with femoral head collapse of 4 mm or less and non-surgical treatment after 6 months or more from the onset of hip pain, 3 underwent surgery and 1 had persistent hip pain. Those with femoral head collapse of over 4 mm (3 cases) all underwent surgery. The osteoarthritic changes, dysplastic hip, sex, and age were not statistically related to the success of non-surgical treatment. Conclusions: The success of non-surgical treatment for SFFFH can be affected by the degree of femoral head collapse and the timing of non-surgical treatment.

Survival of Salmonella enterica and naturally occurring microbiota on eggshell as affected by storage temperature, relative humidity, and inoculum carrier

Sunhyung Park,Seonyeong Choi,Jee-Hoon Ryu 한국식품영양과학회 2013 한국식품영양과학회 학술대회발표집 Vol.2013 No.11

Analysis of Fashion Fabric Image under Control of Color and Texture

Sunhyung Choo,Youngin Kim 한국색채학회 2000 AIC MEETING SEOUL Vol.2000 No.11

Effect of polymer adsorption on film formation of silica/PVA suspension

Sunhyung Kim(김선형),Jun Hee Sung(성준희),Kyung Hyun Ahn(안경현),Seung Jong Lee(이승종) 한국펄프·종이공학회 2009 한국펄프·종이공학회 학술발표논문집 Vol.2009 No.10

An efficient audio fingerprint search algorithm for music retrieval

Sunhyung Lee,Dongsuk Yook,Sukmoon Chang IEEE 2013 IEEE transactions on consumer electronics Vol.59 No.3

<P>The conventional audio fingerprinting system by Haitsma uses a lookup table to identify the candidate songs in the database, which contains the sub-fingerprints of songs, and searches the candidates to find a song whose bit error rate is the lowest. However, this approach has a drawback that the number of database accesses increases dramatically, especially when the database contains a large number of songs or when a matching sub-fingerprint is not found in the lookup table due to a heavily degraded input signal. In this paper, a novel search method is proposed to overcome these difficulties. The proposed method partitions each song found from the lookup table into blocks, assigns a weight to each block, and uses the weight as a search priority to speed up the search process while reducing the number of database accesses. Various results from our experiment show the significant improvement in search speed while maintaining the search accuracy comparable to the conventional method.</P>

Environmentally Friendly Fabrication of Functional Nanocrystals on Surface-Modified Carbon Nanotubes

SunHyung Lee,Katsuya Teshima,Morinobu Endo,Shuji Oishi 한국표면공학회 2010 한국표면공학회 학술발표회 초록집 Vol.2010 No.11

The functionalization process of carbon nanotubes (CNTs) is required as a primary step in fabricating CNTs-supported composites. In this study, CNTs were treated using vacuum ultraviolet (VUV) in order to functionalize their sidewalls with functional groups. The functional groups were used as reaction sites of the various functional nanocrystals, such as platinum and nickel. Additionally, the functional nanocrystals/carbon nanotube composites were successfully fabricated using various synthesis methods. There were investigated that the composites applied to the catalyst in fuel cells and cathode material.

The representation of postcolonial identity in The Age of Shadows and Lust, Caution

Sunhyung Kim 중앙대학교 영상콘텐츠융합연구소 2020 TechArt :Journal of Arts and Imaging Science Vol.7 No.1

Depletion Stabilization in Nanoparticle–Polymer Suspensions: Multi-Length-Scale Analysis of Microstructure

Kim, Sunhyung,Hyun, Kyu,Moon, Joo Yong,Clasen, Christian,Ahn, Kyung Hyun American Chemical Society 2015 Langmuir Vol.31 No.6

<P>We study the mechanism of depletion stabilization and the resultant microstructure of aqueous suspensions of nanosized silica and poly(vinyl alcohol) (PVA). Rheology, small-angle light scattering (SALS), and small-angle X-ray scattering (SAXS) techniques enable us to analyze the microstructure at broad length scale from single particle size to the size of a cluster of aggregated particles. As PVA concentration increases, the microstructure evolves from bridging flocculation, steric stabilization, depletion flocculation to depletion stabilization. To our surprise, when depletion stabilization occurs, the suspension shows the stabilization at the cluster length scale, while maintaining fractal aggregates at the particle length scale. This sharply contrasts previously reported studies on the depletion stabilization of microsized particle and polymer suspensions, which exhibits the stabilization at the particle length scale. On the basis of the evaluation of depletion interaction, we propose that the depletion energy barrier exists between clusters rather than particles due to the comparable size of silica particle and the radius gyration of PVA.</P>

<버닝>에 나타나는 이창동 영화미학의 변화와 그 함의: 작가주의 관점에서

김선형(Sunhyung Kim) 한국영화학회 2019 영화연구 Vol.0 No.82

이 논문은 이창동의 최신작 <버닝>이 그의 전작들과 형식과 서사 면에서 매우 이질적임에 주목하여 전작들과 <버닝>을 비교·분석함으로써 이창동의 새로운 시도가 갖는 함의를 밝혀내고자 하였다. 이창동은 ‘포스트 코리안 뉴웨이브’시기에 활동한 한국의 대표적 작가감독이다. 그는 1997년 <초록물고기>로 작품 활동을 시작한 이래 2018년의 <버닝>에 이르기까지 총 여섯 편의 작품을 연출하였다. 소설가로 창작활동을 시작한 그의 작품세계에는 그의 비극적인 가족사라는 원체험이 항상 깊숙이 자리 잡고 있었다. 그의 소설작품의 주된 정서는 시대에 대한 죄의식과 작가로서의 사회적 책임감이었다. 영화로 활동무대를 옮긴 그는 소설의 한계를 영화에서 구현하려 하였고 소설가로서의 경력 없이는 불가능했을 서사를 직조해 내었다. 그의 서사는 일관되게 역사·사회·제도의 폭력과 오류, 그리고 그 안에 있는 인간의 성찰에 관한 것이었다. <초록물고기>와 <박하사탕>에서는 근대화의 격동의 역사를, <오아시스>와 <밀양>에서는 ‘집단’과 ‘개인’을 고찰했다. 이러한 그의 세계는 장르의 차용, 리얼리즘과 모더니즘적 수사학을 통해 구현되었고 이들의 총합은 그만의 작가세계를 창조해 내었다. <초록물고기>는 갱스터와 느와르 장르를, <박하사탕>·<오아시스>·<밀양>·<시>는 드라마장르에 멜로와 사회성을 두텁게 입혔다. 그의 영화는 리얼리즘 방식을 통해 시대적 문제에 대한 핍진성과 진정성을 획득하였고, 여기서 더 나아가 모더니즘의 수사학까지 적용하여 관객의 성찰을 유도해 내었다. 그러므로 <버닝>이 새롭게 마음-게임(mind-game) 영화라는 스릴러 장르를 표방한 것, 그리고 전작들과 차별화된 서사(두 대립항의 변화된 역학관계)를 전개한 것은 이창동 작품세계의 변화에 대해 질문하게 한다. 이 논문은 이러한 변화의 근저에는 이창동 세계관의 변화가 전제되어 있다고 보고 먼저 이창동의 전작들과 <버닝>을 형식과 내용면에서 상세히 비교·분석하였다. 그 내용을 토대로 <버닝>의 영화적 목표는 결국 포스트모던한 현재의 한국, 그것의 재현이라는 이창동의 목표임을 읽어내었다. 이창동 세계관의 변화는 결코 모호하고 불확실한 현재에 대한 절망이나 포기라는 수동적 태도를 의미하는 것은 아니다. 오히려 그의 영화에 현재를 적극적으로 재현해냄으로써 현재에 대한 비판적 인식과 더불어 미래에 대한 성찰에 이르기를 요구하는 또 다른 그의 저항정신이다. 따라서 이창동의 작가정신은 스릴러 <버닝>에서도 여전히 유효하다. Lee Changdong’s recent film Burning shows dramatic changes in genre and narrative compared with his five previous works. This paper’s main interest is to find out the implication of these changes in terms of cinematic esthetics. Lee, an author-director, is one of the greatest figures in Korean Film Industry who worked in the period of “Post-Korean New Wave”. He made his debut with the film Green Fish in 1997 and has directed six films so far including his latest one Burning in 2018. He started his career as a writer. The main themes of his novels were always about his guilt and responsibility to the society and the same was true of his films which reflected his own tragic life experiences. He made himself outstanding by directing films which challenged the limits of literature and by weaving narratives which were not possible at all without his career as a writer. He was very consistent in conveying his messages of resistance to the violence and errors of our history and the system and people in them. He delved into the tumultuous process of modernization in Green Fish and the relationship of the system and a person in Oasis and Secret Sunshine in depth. His cinematic representation was realized with the acceptance of genre and the rhetorics of realism and modernism, which created his own artistic world. Green Fish is classified as gangster noir film and Peppermint Candy, Oasis, Secret Sunshine and Poetry as social drama. His films acquired verisimilitude and authenticity through realism. At the same time, his rhetorics of modernism led to the introspection of the audience. Thus, Lee’s acceptance of new genre(as mind-game film) and narrative in Burning aroused the question of Lee’s change in his views of the world. This essay analyzed the form and the content in Burning and his five previous works in detail assuming Lee’s view of the world has been changed. A new interpretation of his changes was made based on this analysis, which is his desire to express postmodern world of Korea in Burning. His attempt doesn’t necessarily mean his despair or abandonment of the present world, a world of vagueness and uncertainty. Rather, it’s legitimate to interpret his challenge as desperate effort to represent our present world in his film to voice his resistance and thus to lead the audience to another introspection of the present and the future. Lee Chang-dong’s auteurism has never been weakened, but intensified in Burning.

변장 감지에 기반한 얼굴 인식 시스템

최선형(SunHyung Choi),김준영(JunYoung Kim),이기성(KiSung Lee),정선태(SunTae Jung),조성원(SungWon Cho) 한국지능시스템학회 2010 한국지능시스템학회 학술발표 논문집 Vol.20 No.2

본 논문은 얼굴인식 시스템 상에서 마스크를 착용한 변장이미지가 입력되어 감지될 경우 나머지 노출된 부분의 특징만을 가지고 가려진 사람의 신원을 추정하는 방법을 소개한다. 얼굴영역 검출 후에 마스크상단의 눈 주변이미지만을 가지고 특징점 추출을 실시한 다음 등록된 언굴 인증 데이터 베이스와의 특징점 비교를 통해 사람의 신원을 추정한다. 매칭에 쓰일 특징점 추출에는 조명에 강인하고 영상의 크기와 회전에도 변하지 않는 특성을 가진 SIFT(scale invariant feature transform, 크기불변특징변환) 알고리즘을 이용한다. 특징점 매칭을 통해 정확한 매칭률을 전체 실험결과를 통해 평가한다.