• 제목/요약/키워드: Bak-like

검색결과 61건 처리시간 0.025초

멀티터치 인터페이스 회의시스템 구축 방안 연구 (Building Plan Research of Meeting System based on Multi-Touch Interface)

  • 장석주;박선희;최태준
    • 한국인터넷방송통신학회논문지
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    • 제14권5호
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    • pp.255-261
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    • 2014
  • IT산업의 발달은 현대사회에 큰 변화를 가져왔다. 그 변화는 모든 분야에 적용되어 생활을 점점 더 편리하게하고, 업무는 더 효율적으로 빠른 처리가 가능하게 하면서 사람들을 편리한 삶으로 이끌고 있다. 이러한 변화의 중심에는 인터페이스가 크게 작용하고 있으며, 점점 발전해 현재는 사용자 행동기반의 인터페이스 NUI(Natural User Interface)기술을 사용 중에 있다. NUI는 별도의 입력 장치 없이 터치, 제스쳐 등의 자연스러운 행동을 통해 시스템과 소통할 수 있도록 하는 기술이다. 그 중 스마트 폰은 NUI 기술을 적용한 대표적인 디바이스이다. 스마트폰 뿐만 아니라 NUI 기술은 키오스크, 대형 테이블 등의 터치스크린에 적용하여 문화, 국방, 광고 산업 등 다양한 분야로 개발 및 활용 중에 있다. 이에 본 연구에서는 NUI기술을 활용하여 멀티 터치 테이블 기반의 멀티 터치 회의 시스템을 구축하여 기존의 회의 방식을 개선할 수 있는 효율적인 시스템을 제안한다.

Comparison of Endovascular Treatments of Ruptured Dissecting Aneurysms of the Intracranial Internal Carotid Artery and Vertebral Artery with a Review of the Literature

  • Byoun, Hyoung Soo;Yi, Hyeong Joong;Choi, Kyu Sun;Chun, Hyoung Joon;Ko, Yong;Bak, Koang Hum
    • Journal of Korean Neurosurgical Society
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    • 제59권5호
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    • pp.449-457
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    • 2016
  • Objective : Subarachnoid hemorrhage (SAH) caused by rupture of an internal carotid artery (ICA) or vertebral artery (VA) dissecting aneuryesm is rare. Various treatment strategies have been used for ruptured intracranial dissections. The purpose of this study is to compare the clinical and angiographic characteristics and outcomes of endovascular treatment for ruptured dissecting aneurysms of the intracranial ICA and VA. Methods : The authors retrospectively reviewed a series of patients with SAH caused by ruptured intracranial ICA and VA dissecting aneurysms from March 2009 to April 2014. The relevant demographic and angiographic data were collected, categorized and analyzed with respect to the outcome. Results : Fifteen patients were identified (6 ICAs and 9 VAs). The percentage of patients showing unfavorable initial clinical condition and a history of hypertension was higher in the VA group. The initial aneurysm detection rate and the percentage of fusiform aneurysms were higher in the VA group. In the ICA group, all patients were treated with double stent-assisted coiling, and showed favorable outcomes. In the VA group, 2 patients were treated with double stent-assisted coiling and 7 with endovascular trapping. Two patients died and 1 patient developed severe disability. Conclusion : Clinically, grave initial clinical condition and hypertension were more frequent in the VA group. Angiographically, bleb-like aneurysms were more frequent in the ICA group and fusiform aneurysms were more frequent in the VA group. Endovascular treatment of these aneurysms is feasible and the result is acceptable in most instances.

Human umbilical cord blood mesenchymal stem cells engineered to overexpress growth factors accelerate outcomes in hair growth

  • Bak, Dong Ho;Choi, Mi Ji;Kim, Soon Re;Lee, Byung Chul;Kim, Jae Min;Jeon, Eun Su;Oh, Wonil;Lim, Ee Seok;Park, Byung Cheol;Kim, Moo Joong;Na, Jungtae;Kim, Beom Joon
    • The Korean Journal of Physiology and Pharmacology
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    • 제22권5호
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    • pp.555-566
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    • 2018
  • Human umbilical cord blood mesenchymal stem cells (hUCB-MSCs) are used in tissue repair and regeneration; however, the mechanisms involved are not well understood. We investigated the hair growth-promoting effects of hUCB-MSCs treatment to determine whether hUCB-MSCs enhance the promotion of hair growth. Furthermore, we attempted to identify the factors responsible for hair growth. The effects of hUCB-MSCs on hair growth were investigated in vivo, and hUCB-MSCs advanced anagen onset and hair follicle neogeneration. We found that hUCB-MSCs co-culture increased the viability and up-regulated hair induction-related proteins of human dermal papilla cells (hDPCs) in vitro. A growth factor antibody array revealed that secretory factors from hUCB-MSCs are related to hair growth. Insulin-like growth factor binding protein-1 (IGFBP-1) and vascular endothelial growth factor (VEGF) were increased in co-culture medium. Finally, we found that IGFBP-1, through the co-localization of an IGF-1 and IGFBP-1, had positive effects on cell viability; VEGF secretion; expression of alkaline phosphatase (ALP), CD133, and ${\beta}-catenin$; and formation of hDPCs 3D spheroids. Taken together, these data suggest that hUCB-MSCs promote hair growth via a paracrine mechanism.

국내 분리 토끼출혈병 바이러스(RHDVa)를 감염시킨 토끼 간장에서의 경시적인 초미세구조 변화와 apoptosis (Sequential hepatic ultrastructural changes and apoptosis in rabbits experimentally infected with Korean strain of rabbit hemorrhagic disease virus (RHDVa))

  • 박중원;전지은;박은정;김한;이명헌;황의경;김재훈;이중복;우계형
    • 대한수의학회지
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    • 제53권1호
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    • pp.11-17
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    • 2013
  • In this study, to understand the pathogenesis of new rabbit hemorrhagic disease virus (RHDVa) serotype, we carried out to administrate RHDVa to rabbits, and to examine sequential electron microscopic changes and relationship between pathogenesis and apoptosis. TUNEL-positive cells began to be observed from 24 hours after inoculation (HAI) and the number of positive cells was slightly increased with the course of time. Whereas marked increase of positive cells was seen in the liver from the rabbits died acutely. Typical viral particles with cup-like projections and a diameter of 30~40 nm were detected in homogenized liver samples and tissues at 36 and 48, and 48 HAI, respectively. Ultrastructurally, glycogen deposition was observed from the first stage of hepatocellular degeneration by RHDVa infection and then, swelling and disruption of cristae of mitochondria by viral particles, swelling of smooth endoplasmic reticulum, vacuoles and vesicles were detected. Condensation, margination and fragmentation of chromatin were observed in degenerative hepatocytes at 36 and 48 HAI, indicating apoptotic bodies. These data offer that hepatocytic apoptosis by RHDV infection could be closely related with mitochondrial impairment in the hepatocytes.

우리 성명(姓名)의 생성 발달에 대하여 (The Origin and Development of Korean Names)

  • 도수희
    • 인문언어
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    • 제1권1호
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    • pp.255-274
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    • 2001
  • This paper examines the history of Korean names, focusing on the structural characteristics and the literal meanings of those for kings and ordinary people. Roughly speaking, the Korean surname system traces its source to China. Historical records show that the Chinese were already using their family names around 1000 B.C. After a millennium or so, the Korean began to follow suit. Initially, however, surnames were in regular use among kings and their kin only: it was not until the late Shilla dynasty, around A.D. 800, that the commoners began to have Heir surnames. And yet, surnames still tended to be limited to men of noble birth, until around A.D. 1000. Though the Korean surname system may be said to have its origin in Chinese, there are no lack of native surnames that have as long a history, e.g., Hae, Bak, Sok, Sol, Ul, and Ol. Typical surnames of Chinese origin that are found during the late Shilla dynasty, around A.D. 900, include Jang (as in Jang Bogo) and Choi (as in Choi Chiwon). Unlike those of Chinese origin, typical Korean names during the age of Three Nations tended to allude to nature or natural phenomena, as can be witnessed in Bit 'light,' Balgum 'bright,' Nuri 'world,' and Soidori where soi means 'steel' and dol 'stone,' Other surnames abound that have to do with river, stream, field, prairie, and so on. King Muryong's original name was Sama, a variant of som 'island,' indicating where he was born. A person skilled in archery was called Jumong or Hwalbo. Baembo was so called because he 'crawls like a snake, baem,' In these last two examples, bo, as well as its variant bu, functions as a suffix, and is also found in Cochilbu, Isabu, Babo, Nolbu, Hungbu, etc. The tradition of using this kind of native Korean names has gradually disappeared, giving place to the names of Chinese style-although very recently we see an on-going movement toward using native names.

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사립대학의 구조조정을 둘러싼 쟁점과 합리적 해결 방안 (Issues and Solutions of Restructuring Private Universities)

  • 최호성
    • 수산해양교육연구
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    • 제24권6호
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    • pp.901-919
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    • 2012
  • The purpose of this study is to conceptualize some issues around university restructuring in Korea, and explore rational-practical solutions ensuring the survival of higher education institutes confronting many challenges like rapid decreasing rate of birth, global open market of higher education system, and the phenomena of concentration on capital city area etc.. In order to achieve study goals, higher education policies and provisions of past governments from DaeJung Kim's to current MeongBak Lee's were analyzed, and also characteristics and directions of university restructuring of each government were identified. Through this analysis, it was evident that the main concern of university restucturing discourse was primarily focused on how to make public universities have high level of competitiveness. On the other hand, private universities had been totally alienated from university restructuring discourse since 1990's, despite their historical and great contributions to national development of our country. Based on some criticisms of educational policies of national government and partial revision proposal of the higher education act initiated by a few assemblymen, this study suggested eight solutions for developmental restructuring of private universities; constructing comprehensive framework of university restructuring, keeping market-friendly restructuring principle to allow universities take an autonomous position, revising methods, criteria and indexes of university evaluation, reducing the number of enrolling students, not the number of universities and colleges, a new policy to develop local universities allying with universities located at capital city area, differentiating private universities into two types of semi- or quasi-national university and complete autonomous university, legislating financial supports to private universities, and lastly, equal treatment of public and private universities in pursuit of half price tuition.

Upper Cervical Subluxation and Cervicomedullary Junction Compression in Patients with Rheumatoid Arthritis

  • Chung, Jaewoo;Bak, Koang Hum;Yi, Hyeong-Joong;Chun, Hyoung Joon;Ryu, Je Il;Han, Myung-Hoon
    • Journal of Korean Neurosurgical Society
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    • 제62권6호
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    • pp.661-670
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    • 2019
  • Objective : Rheumatoid arthritis (RA) is known to involve the cervical spine up to 86%. It often causes cervical instability like atlantoaxial subluxation (AAS), subaxial subluxation, and vertical subluxation (VS). In order to find the relation between RA and cord compression, we will evaluate the characteristics and risk factors of basilar invagination (BI) and cervicomedullary junction (CMJ) compression. Methods : From January 2007 to May 2015, 12667 patients administrated to Hanyang University Medical Center. Four thousand three hundred eighty-six patients took cervical X-ray and 250 patients took cervical computed tomography or magnetic resonance imaging. Radiologic parameters, medication records were obtained from 242 patients. Multivariate logistic regression analysis was performed with correlation of CMJ compression, basin-dental interval (BDI), basin-posterior axial line interval (BAI), pannus formation, BI, and AAS. Results : In the point of CMJ compression, atlantodental interval (ADI), posterior-atlantodental interval, BAI, AAS, and BI are relatively highly correlated. Patients with BI have 82 times strong possibility of radiologic confirmed CMJ compression, while AAS has 6-fold and pannus formation has the 3-fold possibility. Compared to the low incidence of BI, AAS and pannus formation have more proportion in CMJ compression. Furthermore, wrist joint erosion was correlated with VS and AAS. Conclusion : BI has a very strong possibility of CMJ compression, while AAS and pannus formation have a high proportion in CMJ compression. Hence bilateral wrist joint erosion can be used as an indicator for the timing of screening test for cervical involvement. We suggest the early recommendation of cervical spine examination for the diagnosis of cervical involvement in order to prevent morbidity and mortality.

수요예측을 통한 다빈도 구매상품의 적정재고 수준 결정 모형개발: 공항면세점 사례 (Developing Appropriate Inventory Level of Frequently Purchased Items based on Demand Forecasting: Case of Airport Duty Free Shop)

  • 차대욱;박상아;공인택;신광섭
    • 한국빅데이터학회지
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    • 제5권2호
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    • pp.1-15
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    • 2020
  • 코로나 이전 국내 면세산업은 2000년 이후 관광 수요의 증가와 함께 꾸준한 성장세를 보였다. 급증한 수요에 대응하기 위해 면세점들은 매출액 위주의 경쟁전략을 유지해왔으며, 이에 따라 효율적인 운영보다는 규모 측면의 성장을 위한 방안 수립에만 집중해왔다. 기존 연구에서는 면세상품 관련 마케팅이나 제도적 지원방안 수립에 관한 연구가 주를 이루었으며 실제 운영단계인 물류 관리 측면에서의 연구는 부족했다. 이에 본 연구에서는 면세점 운영의 효율성 향상을 위한 적정재고 수립 방식을 제시하기 위해 출국자 예측모형과 장래 상품 판매량을 선형회귀방정식을 활용하였다. 이와 더불어, 실증연구를 통해 본 정책을 도입할 때 기대효과를 비용적 측면과 현장 운영 측면에서 분석하였다. 본 연구 결과를 바탕으로 면세점에서 발생하는 과다재고문제를 진단하고 공급주기를 개선함으로써 비용 절감 및 생산성 향상이 가능할 것으로 예상된다.

『황제내경(黃帝內經)』에서 사용된 '심(心)'자(字)의 용례 분석 연구 (A Study on the Use and Meaning of the '心' Letter in 『Hwangjenaegyeog』)

  • 박재용
    • 한국콘텐츠학회논문지
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    • 제21권5호
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    • pp.824-836
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    • 2021
  • 본 연구에서는 『황제내경(黃帝內經)』에 사용된 '심(心)'자(字)의 활용과 그 의미를 살펴보았다. 한자에서 '육(肉)'은 육체를 상징하는 기호이다. 오장을 표현하는 간(肝), 비(脾), 폐(肺), 신(腎)의 글자는 모두 '육(肉)'의 형태를 포함하고 있어서 의미적인 혼동을 일으키지 않는다. 그러나 심장과 마음을 의미하는 한자는 모두 '심(心)'으로 쓰이기 때문에 그 의미를 파악하는 데 어려움이 있다. 또한, 『황제내경(黃帝內經)』의 내용은 질병부터 천문학에 이르기까지 다양한 분야를 총망라하고 있다. 이러한 이유로 『황제내경소문(黃帝內經素問)』에서 사용된 총 286개의 '심(心)'자는 다양한 의미를 내포하고 있다. 본 연구의 결과에 의하면, '심(心)'의 용례는 첫째 인간의 심장, 둘째 인체의 흉부, 셋째 마음을 의미한다. 넷째, 초월적인 개념의 깨달음, 다섯째 심포(心包), 여섯째 논리적인 사고, 일곱째 중심 또는 핵심, 그리고 마지막으로 별자리를 의미한다. 본 연구의 결과는 추후 『황제내경영추(黃帝內經靈樞)』 뿐만 아니라 고전 문헌들에서 '심(心)'의 의미를 파악하는 데 도움이 될 수 있을 것으로 생각된다.

ZnO 기반 NO2 가스센서의 MgZnO와 MgO을 통한 성능 향상에 대한 연구 (Study on the Performance Improvement of ZnO-based NO2 Gas Sensor through MgZnO and MgO)

  • 박소영;이세형;박찬영;백동기;이문석
    • 센서학회지
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    • 제31권6호
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    • pp.455-460
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    • 2022
  • Brush-like ZnO hierarchical nanostructures decorated with MgxZn1-xO (x = 0.1, 0.2, 0.3, 0.4, and 0.5) were fabricated and examined for application to a gas sensor. They were synthesized using vapor phase growth (VPG) on indium tin oxide (ITO) substrates. To generate electronic accumulation at ZnO surface, MgZnO nanoparticles were prepared by sol-gel method, and the ratio of Mg and Zn was adjusted to optimize the device for NO2 gas detection. As the electrons in the accumulation layer generated by the heterojunction reacted faster and more frequently with the gas, the sensitivity and speed improved. When tested as sensing materials for gas sensors at 100 ppm NO2 at 300℃, these MgZnO decorated ZnO nanostructures exhibited an improvement from 165 to 514 times compared to pristine ZnO. The response and recovery time of the MgZnO decorated ZnO samples were shorter than those of the pristine ZnO. Various analyzing techniques, including field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray powder diffraction (XRD) were employed to confirm the growth morphology, atomic composition, and crystalline information of the samples, respectively.