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Ormocer-Based-Resin의 상아질에 대한 전단결합강도 및 파절 양상에 대한 연구
안시현,조인호,임주환,임헌송,Ahn, Shi-Hyun,Cho, In-Ho,Lim, Ju-Hwan,Lim, Heon-Song 대한턱관절교합학회 2002 구강회복응용과학지 Vol.16 No.3
The bond strength is one of the most important factor in establishing long-term success of esthetic restorative dentistry. So, various restorative materials have been introduced to improve the esthetic and physical properties. Ormocer (organically modified ceramic) was developed as a result of such efforts. This study was performed to compare the shear bond strength of ormocer based adhesive with that of existing dentin adhesive. In this study $Admira^{(R)}$ and $Admira^{(R)}$ bond of the ormocer system are grouped together for ADM, Single $Bond^{(R)}$ which is an one-bottle adhesive and Z-250TM which is hybrid composite resin of BIS-GMA system for SIN, and $Definite^{(R)}$ of ormocer and Etch & $Prime^{(R)}$ 3.0 which is a self etching priming/ bonding agent for ETC. The results of this study were as follows. : (1) In the comparison of shear bond strength according to different adhesive system, shear bond strength was increased in the order of ETC group, SIN group, ADM group. There was no significant difference between ADM group and SIN group. However, there was a significant level of difference between ADM and ETC groups as well as SIN and ETC groups( p<0.05). (2) Examination by a scanning electron microscope showed a well established hybrid layer and resin tag in both ADM group and SIN group, while ETC group showed a minimal formation of the hybrid layer when compared with ADM and SIN groups. From the above results, it may be reasonable to start the clinical application of ormocer system, and it is recommended that ormocer system should be used along with an ormocer based adhesive because ormocer system showed the lower shear bond strength when it used with other existing self etching priming/bonding agent. The self etching priming/bonding agent showed relatively low shear bond strength, and it is considered that the further study should be needed.
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Ladysmith Black Mambazo 음악의 특징: 'Black is Beautiful', 'Homeless'를 중심으로
안시현,Ahn, Sihyeon 국제문화기술진흥원 2021 The Journal of the Convergence on Culture Technolo Vol.7 No.3
Ladysmith Black Mambazo is a group of men influenced by South African traditional Zulu a cappella and American black music. The Jubilee Choir of the United States came to South Africa in the 1870s and influenced South African music while performing. Ladysmith Black Mambazo's music can be the result of the combination of the indigenous Zulu a cappella and the American Jubilee music style. This group participated in Paul Simon's album "Graceland" and became world famous. The album won a Grammy Award for sales of millions of copies. After that, they released their own albums and won 5 times Grammy Awards (nominated 15 times) They inherited and developed Zulu music under the philosophy of "preserving musical heritage". As a samely non-Western country, with hope their spirit, inheriting old one and innovating new one, gives positive inspiration for Korean music, I investigated how their music, 'Black Is Beautiful', 'Homeless' are influenced by the western music and inherited their own traditional music in it. Ladysmith Black Mambazo는 남아프리카공화국의 전통적인 줄루 아카펠라와 미국흑인음악의 영향을 받은 남성그룹이다. 미국의 주빌리 합창단이 1870년대에 남아프리카공화국에 와서 공연을 하면서 남아프리카공화국의 음악에 영향을 미쳤다. 토착적인 줄루족의 아카펠라와 미국의 주빌리 음악 스타일이 만나 탄생한 음악이 Ladysmith Black Mambazo의 음악이라고 할 수 있다. 이들은 Paul Simon의 앨범 『Graceland』에 참여하게 되면서 전세계적으로 유명해진다. 앨범은 수백만 장의 판매고를 올리게 되고 그래미 어워즈에서 수상을 하게 되었다. 그 후로도 자신들만의 앨범을 발매하여 그래미어워즈에서 총 5회의 수상을 하게 되고, 15회 노미네이트 되었다. 그들은 음악적 유산보존을 철학으로 삼아 줄루족의 음악을 계승·발전시켰다. 같은 비서구권 국가로서 법고창신의 정신을 돌아보고 우리나라의 뮤지션들에게 좋은 영향력이 되길 바라며 Ladysmith Black Mambazo의 'Black Is Beautiful'과 'Homeless'의 음악 분석을 통하여 이들의 음악이 서양의 음악에서 받아들인 점과 자신들만의 전통음악에서 계승해나가고 있는 점들을 알아보았다.
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Carboxylic acid가 CuInS<sub>2</sub>/ZnS 반도체 나노입자의 광학적 특성에 미치는 영향
안시현,최규채,백연경,김영국,김양도,Ahn, Si-Hyun,Choi, Gyu-Che,Beak, Yeun-Kyung,Kim, Young-Kuk,Kim, Yang-Do 한국분말야금학회 2012 한국분말재료학회지 (KPMI) Vol.19 No.5
We report the effect of the chain length of carboxylic acid on the photoluminescence(PL) of $CuInS_2$/ZnS nanocrystals. $CuInS_2$/ZnS nanocrystals with emission wavelength ranging from 566 nm through 583 nm were synthesized with zinc acetate and carboxylic acids with various chain length. In this study, $CuInS_2$/ZnS nanocrystals prepared using long chain carboxylic acid showed more improved PL intensity. The origin of strong photoluminescence of the nanocrystals prepared with zinc acetate and long chain carboxylic acid was ascribed to improved size distribution due to strong reactivity between long chain carboxylic acid and zinc acetate.
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안시현(Si Hyeon Ahn) 한국문화융합학회 2024 문화와 융합 Vol.46 No.1
본고는 명창 안숙선과의 인터뷰를 통해 그의 판소리 예술세계를 조명해 보는데 목적이 있다. 연구방법은 안숙선의 생애를 통해 그의 음악 업적을 정리하고, 작품을 만들어 가는 과정에서 시대와 상황에 따라 대중과 소통하려는 수시처변의 주체적 창작정신을 탐구하며, 판소리 완창을 부르게 된 소회를 통해그의 판소리 예술세계를 탐색한다. 그 결과 안숙선은 클래식을 비롯하여 재즈와 K-Pop까지, 다양한 서양음악과 우리 음악의 융합을 위하여 크로스오버, 퓨전 등 많은 시도를 하였다. 그의 예술세계는 기본적으로 우리의 고전음악을 바탕으로 하여 새로운 창작을 하였고, 판소리의 최고 단계인 ‘득음’에 이르고자 부단한 노력을 하였으며, 대중과 소통할 수 있는 음악을 목표로 삼았다. 그는 세계에 우리 소리를 알리는데 많은 공헌을 하여 우리나라의 판소리 문화를 확장시켰다. The purpose of this paper is to shed light on the world of pansori art through an interview with master singer Ahn Sook-sun. The method of this research is by summarizing Ahn Sooksun's musical achievements through her life and by exploring her independent creative spirit to communicate with the public according to the times and situations in the process of creating her works. We explore the artistic world of her pansori through her thoughts on how she came to sing the full version oh pansori. As a result, Ahn Sook-sun made many attempts, such as Crossover and Fusion, to fuse various Western music with Korean music, including Classical music, Jazz, and K-Pop. Her artistic world was based on Korean classical music and added new creative works, making constant efforts to reach 'Deuk-eum', the highest level of pansori. Her objective for music was to be able communicate with the public. she contributed greatly in promoting our Korean sound to the world and expanded Korea's pansori culture.
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안시현(Shi-Hyun Ahn),박윤하(Yun Ha Park),문병인(Byungin Moon) 한국정보기술학회 2023 한국정보기술학회논문지 Vol.21 No.3
Recent wildfires are direct results of global warming. Most of the existing wildfire prevention has mostly focused on flame detection. However, it does not provide rapid response. In this paper, we develop deep learning-based “smoke” detection on CCTV for quick reaction. we also analyze real-time multi-channel images to monitor a wide area. The system has an accuracy of smoke recognition over 93% for mAP and can analyze 50-channel images simultaneously. A dashboard S/W and emergency alarm system(SMS) was developed for managers to monitor forest fire smoke in real time. Providing real-time information can reduce the loss of life and property from wildfires and enhance protection of critical facilities. we plan to develop a emergency alarm system(mobile app) in the future. As a result, it is expected that forest fire damage will be minimized by checking the forest fire situation in real time.
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월드뮤직 장르 ‘I sicathamiya’ 의 민족전통전개
안시현 ( Si Hyeon Ahn ) 세계음악학회 2016 음악과 문화 Vol.35 No.-
This is a thesis on studies of the historical change of Isicathmiya. Isicathamiya is what the folk music factors which Zulu, one of South Africa tribes, has are reflected on the western a cappella. Although Isicathamiya originated with introduction of American Black gospel, I studied only the music not with evidence spread from mouth to mouth but with the accurate audio materials and recoding in this paper. First I had argued about the history. This is because the music is formed with social and cultural background. I ascertained that politics, economy, social, and culture etc. of South Africa have something to do with Isicathamiya as I examined the origin and the historical process of Isicathamiya. The periodical music history was divided into 4 stages such as a formative period, a transition and development period, and the present period from a newspaper record published in Durban in 1891 to the present time. And I examined the periodical features of Isicathamiya based on the important points among features revealed by a representative musician’ s works in each period. Although Isicathmiya, South Africa``s music genre, was developed under the influence of black gospel, it was developed in its own unique music genres beyond the mere imitation and it is causing a great reverberation in the world music market. This thesis has a significant meaning because it studies Isicathamiya``s characteristics by reviewing its historical transition. In 21st century considering diversity and creativity as important things, the trend to lose the identity of the domestic music owing to accepting western music unconditionally must move toward the succession and development of the domestic traditional music. I studied this thesis, hoping that Korean music will try to create a new style like that of South Africa. I hope that such a research as this will continue.
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안시현(ShiHyun Ahn),안정훈(JeongHun Ahn) 한국자동차공학회 2012 한국자동차공학회 지부 학술대회 논문집 Vol.2012 No.4
Most of countries are awaking to the need for cutting fuel consumption and greenhouse gases since 2000. There is a growing need to introduce new safe vehicles for the aged and a physically challenged person. A electric scooter and wheelchair is eco-friendly vehicle making electric battery a alternative to oil and has good features as a mobility assisting vehicle. This paper presents a new method to control Motor Speed with APS and CAN signals a electric scooter and wheelchair. A Motor Speed Control Module designed for new method is composed of MCU(dspic30f6015) and APS signal interface and CAN Transceiver and LCD Controller and switch. These are performed signal conversion from APS signal to CAN signal and motor speed control test with Accelerator Pedal Module and CANoe and MCLV Board.
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조셉 샤발랄라(Joseph Shabalala)의 저항적 미의식 소고
안시현(Ahn Si-Hyeon) 한국문화융합학회 2017 문화와 융합 Vol.39 No.1
본고는 조셉 샤발랄라의 저항적 심미의식을 조명하는데 목적이 있다. 조셉은 남아프리카 공화국의 전통적인 줄루 남성 아카펠라 그룹인 레이디스미스 블랙 맘바조(Lasysmith Black Mambazo)의 리더이다. 조셉은 이 그룹을 이끌며 줄루족의 전통 음악인 이시카타미야(Isicathamiya)를 남아프리카 공화국에서 발전시켰고, 그래미상을 수상하면서 세계에 줄루족의 음악장르를 알렸다. 레이디스미스 블랙 맘바조는 세 단어가 합쳐져서 만들어진 이름으로 레이디스미스는 샤발랄라의 가족의 고향 크와줄루 나탈(KwaZulu-Natal)의 마을이름이고, 블랙(Black)은 검은 소를 의미하는데 이것은 줄루 언어에서 가장 힘센 농장 동물이라는 뜻이다. 맘바조(Mambazo)는 도끼를 뜻하는 줄루어로 ‘자른다’는 의미를 포함하고 있다. 의미를 통합하면 “레이디스미스마을의 가장 힘센 황소가 자신들의 노래에 도전하는 모든 경쟁자를 잘라버린다”가 된다. 레이디스미스 블랙 맘바조는 리더인 조셉이 1964년에 결성하였다. 이들은 처음엔 결혼식과 모임에서의 연주로 시작하여 성공을 거두었다. 그 후 이시카타미야 대회에 출전하게 되는데 소위 ‘너무 잘한다’는 이유로 출전은 하지 못하게 되고 대신 같이 참여하여 공연하는 것에 대해서는 환영을 받는다. 7인조로 시작한 이들은 현재 40개 이상의 음반을 보유할 정도로 활발한 활동을 하고 있으며, 음악적 유산 보존을 자신들의 음악 철학으로 삼아 부드러우면서도 자유분방한 형식을 특징으로 하는 줄루족의 전통음악인 ‘이시카타미야’를 계승하고 발전시켰다. 특히 조셉은 남아프리카 공화국이 영국의 식민지에 놓여 있을 때 서구 문명의 제국주의와 식민주의에 저항하자는 사상을 이시카타미야 음악을 통해 표현했다. 그의 이시카타미야 음악에는 식민지 시절의 풍부한 경험과 독립에 대한 열망을 ‘저항의식’으로 드러냄으로써 서구의 예술세계에서 찾아볼 수 없는 아프리카의 독특한 정신세계가 들어 있다. 그의 이러한 저항의식은 남아프리카 공화국인의 정신세계를 반영한 것이므로 그의 생애와 공연 및 음악활동을 통해 미의식을 밝히는 데에 의의를 두었다. 20세기는 포스트모더니즘 시대이다. 다양성과 다원성 속에서 개성의 독창성이 강조되는 시기에 남아프리카 공화국 줄루족의 이시카타미야 음악을 세계에 알리고 자국의 아파르트헤이트라는 인종차별에 대한 저항의식을 고발한 조셉의 노래 가사에서 그의 주체적 예술정신을 살펴보았다. 한 나라의 고유한 문화가 작가의 예술정신과 작품을 통해 세계인에게 감화를 주고 소통하는 힘은 큰 것이다. 이시카타미야라는 음악 장르로서 자국의 사회적 불합리성과 흑백의 인종을 분리하려는 군국주의에 대한 고발은 인류를 사랑하는 세계인에게 강한 메시지를 주고 있다. 이러한 현실사회를 고발하는 저항적 미의식이 곧 20세기의 시대사조로 용인되고 있는 것이라 본다. This paper illuminates the aesthetic spirit of resistance shown in the music of Joseph Shabalala who is a leader of Ladysmith Black Mambazo that is an all-male a cappella singing group of the Republic of South Africa. Joseph Shabalala, as a leader of Ladysmith Black Mambazo, developed Isicathamiya, which is one of the traditional usic genres of Zulus, in South Africa. He also introduced the music of Zulus to the world after winning Grammy Awards. The name of the group, Ladysmith Black Mambazo, originates from the following three words. Ladysmith is a town in KwaZulu-Natal, which is a hometown of Shabalala’s family. Black refers to a black ox that is considered the strongest farm animal in the Zulu language. Mambazo refers to an ax in the Zulu language and includes the meaning of ‘chop down.’ Taken all together, Ladysmith Black Mambazo means that “the strongest axes from Ladysmith chop down any competitors.” Joseph Shabalala formed Ladysmith Black Mambazo in 1964. They initially started out by performing at wedding ceremonies and other gatherings and soon became successful. Afterward, they tried to enter Isicathamiya competitions, but they were not allowed to compete since they were ‘so good.’ Instead, they were welcomed to perform at competitions as an invited choir. Ladysmith Black Mambazo started with 7 members. Since their debut, they have been actively performing and released over 40 albums so far. In accordance with their philosophy to preserve their musical legacy, they have inherited and further developed ‘Isicathamiya,’ a traditional music of Zulus, which features a free format. Especially, Joseph Shabalala expressed in his music the thought of resistance to western imperialism and colonialism during the time when South Africa was a British colony. In Joseph’s Isicathamiya music, there exists a distinctive African mentality that is not normally shown in Western arts. This is because the music expresses his own experience during the colonial period and his desire for independence through so-called ‘the spirit of resistance’ that reflects the mentality of South Africans at the time. In this respect, this paper sheds lights on the aesthetics of Joseph Shabalala through his life, performance and musical activities. Additionally, the twentieth century was an era of postmodernism, when an idea of individuality and originality was emphasized in addition to diversity and cultural pluralism. Thus, this paper also examines Joseph Shabalala’s independent artistic spirit based on his lyrics which reveal the spirit of resistance to apartheid in South Africa and introduce Isicathamiya music of South African Zulus to the world. It is a powerful thing that through works of art or artists’ points of view, a traditional culture of a certain country can have an influence upon people from different countries in the world and can interact with them. Isicathamiya gives a strong humanitarian message to the world by revealing social irrationality that was taking place in South Africa and criticizing militarism that divided people by color. This aesthetic spirit of resistance to the irrational reality appears to be accepted as a trend in the twentieth century.
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