라인스캔 카메라를 이용한 3차원 정밀 측정

김현주,윤두현,김학일,Kim, Hyun-Ju,Yoon, Doo-Hyun,Kim, Hak-Il 한국광학회 2008 한국광학회지 Vol.19 No.5

본 논문에서는 라인스캔 카메라를 통해 모든 영역의 영상을 획득하는 연구를 제안한다. 이 방법은 기존의 면적 카메라를 이용했던 방법에 비해 투영격자의 이동 횟수를 획기적으로 줄일 수 있으며, 그로 인해 측정시간이 매우 빠르고 측정정밀도도 뛰어난 장점을 가진다. 본 논문의 스캐닝 모아레 측정 방법은 넓은 영역의 3차원 형상 정보를 얻는데 매우 유익하며, 대면적의 대상물 측정 시 일반적으로 사용하는 stitching 기법을 사용할 필요가 없으므로 한번에 전 영역의 3차원 형상의 복원이 가능하여 보다 빠른 속도로 3차원 형상 정보를 얻을 수 있는 효과가 있다. 또한, 투영격자 하나만을 이용한 영사식 모아레 방식을 이용하여 작은 높이 단차를 갖는 물체의 3차원 형상을 복원하고 그 높이를 용이하게 측정 할 수 있다. 본 연구는 양산환경(Mass production)의 웨이퍼 범프 높이 검사 및 FC-CSP나 FC-BGA 범프 높이 검사 등에 활용 할 수 있으며, 실험을 통해 기존의 방법에 비해 투영격자의 이동횟수 및 측정 속도가 향상되었음을 확인하였다. This paper presents the Projection Moire method using a line scan camera. The high resolution feature of a line scan camera makes it possible to scan an image quickly, thus enabling a much quicker 3D profile. This method uses a high resolution line scan camera making it possible to scan an image at high speed simultaneously measuring the 3D profile of a large FOV. When using a high resolution scan camera, a full FOV is scanned, thus requiring just one movement of a projection grating. As a result, the number of grating movements is reduced drastically. The end result is a faster and more accurate 3D measurement. Moving the grating too quickly causes vibration in the imaging system, which will normally be required to apply a stitching technique when using an area scan camera. However the technique is not required when using a line scan camera. Compared with the previous techniques, it has the advantages of simple hardware without moving mechanical parts - single exposure for obtaining three-dimensional information. A method using a high resolution line scan camera can be used in mass production to measure the bump height of wafers or the bump height of package substrates.

신채호와 노신 소설의 노예성 비판에 대한 비교 연구

김현주(Kim, Hyun-Ju) 한국어문학회 2014 語文學 Vol.0 No.125

The object of this thesis was Sin, Chae-Ho"s Fierce Battle of Dragon to Dragon and Lu Xun"s A lunatic’s diary and investigated the similarity and difference of the criticism of slavery and the aspect of its overcome. Two works criticize the cannibalistic society over thousands years and the enslaved men therein. The works reject the romanticism and ideality of revolution through establishment of characters like "elder and younger brother" and depict the change of reality through awareness of the public. Miri and dragon, and the lunatic and elder brother is an inseparable entity, a mirror that reflects each other, that lies in the environment in which conflict and enmity lasts holding two inner values. This establishment of character has the effect of reflecting the inner self-contradiction by nullifying the border between the good and the evil. Sin, Chae-Ho expands the epic with a radical revolution, while Lu Xun dreams of reformation by the way of infiltrating into the logics of reality. This difference might result from the context the two countries were in, colony and semi-colony. The fact, that Lu Xun was in the situation to be able to intervene deeply in the reality of China, while Sin, Chae-Ho was in the social status as a refugee difficult to contact directly with domestic people, might be a reason that makes a difference between two writers" narrative technique and imbodiment of character. The issue of slavery the two writers explored can not be seen as a problem of only feudalistic and imperial age. Under the structure of pressure, human being can anytime be recomposed as new slavery to settle down in the cannibalistic structure. The nowness and the meaning of this work can be found in that the enslavement is given rebirth beyond the age.

안전성 향상을 위해 감마선 조사한 시판 플레인 요구르트의 품질 특성

김현주,송현파,함준상,이주운,김기혁,조철훈,Kim, Hyun-Joo,Song, Hyun-Pa,Ham, Jun-Sang,Lee, Ju-Woon,Kim, Kee-Hyuk,Jo, Cheor-Un 한국축산식품학회 2008 한국축산식품학회지 Vol.28 No.5

To develop a yogurt for sensitive consumer such as infants, children or immuno-compromised patients using gamma irradiation, the effects of gamma irradiation on the microbiological, chemical, and sensory quality in a commercial plain yogurt were investigated. No viable coliform bacteria were detected in the sample and approximately a 6 decimal reduction was achieved in the number of total aerobic bacteria by irradiation at 5 kGy. The initial population of lactic acid bacteria observed in the commercial plain yogurt was 8.95 log CFU/g. Gamma irradiation significantly reduced the initial microbial level to 6.47 and 2.85 log CFU/g after irradiation at 1 and 3 kGy, respectively (p<0.05). However, irradiation dose up to 5 kGy could not completely eliminate the lactic acid bacteria in commercial plain yogurt. pH, color, lactose and lactic acid content, and sensory quality were not affected by irradiation treatment and storage. Our results suggest that irradiation can improve the microbial quality of commercial plain yogurt without impairing the physicochemical and sensory quality.

감마선 조사와 푸코이단/라미나린 병용처리가 돈육 패티의 품질에 미치는 영향

김현주,최종일,박진규,송범석,김재훈,윤요한,김천제,신미혜,변명우,이주운,Kim, Hyun-Joo,Choi, Jong-Il,Park, Jin-Gyu,Song, Beom-Seok,Kim, Jae-Hun,Yoon, Yo-Han,Kim, Cheon-Jei,Shin, Mee-Hye,Byun, Myung-Woo,Lee, Ju-Woon 한국축산식품학회 2009 한국축산식품학회지 Vol.29 No.1

The objective of this study was investigated to apply the fucoidan and laminarin extract from low-grade Undaria pinnatifida to real food product, a pork patty. Pork patties added with fucoidan and laminarin showed lower lipid oxidation and the inhibition against lipid oxidation was shown to be dependent on the irradiation doses. The Hunter color values of pork patty added with fucoidan increased significantly with an increase of irradiation dose. The hardness profiles of the patties with fucoidan and laminarin was decreased, but the amount of water in the patties was increased. Also, the combination of gamma irradiation and addition of fucoidan and laminarin was shown to be effective for the microbiological control. These results suggested that gamma irradiation and fucoidan and laminarin treatment showed the positive effect on microbial stability and quality of the pork patty.

비우식성 치경부 병소와 5급 와동 수복물이 치주조직에 미치는 영향

김현주,김성조,최점일,이주연,Kim, Hyun-Joo,Kim, Seong-Jo,Choi, Jeom-Il,Lee, Ju-Youn 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.1

Purpose: The non-carious cervical lesion(NCCL) is a loss of tooth structure at the neck of affected teeth that is unrelated to tooth caries. The reported prevalence of NCCL varies from 5% to 85%. Prevalence and severity of lesions have been found to increase with age. They are becoming more significant as people live longer and become more aware of the importance of oral health. The purposes of this study were first, to examine the periodontal conditions associated with NCCL, and second, to investigate the clinical effects of class V restorations of NCCL on periodontal tissues. Materials and methods: The sample size was 982 teeth of 50 subjects(25 male, mean age $52{\pm}7$) who were seen at the Department of Periodontology, Pusan National University Hospital. At the baseline examination, clinical periodontal parameters were measured. After the initial examination, 24 patients who were absent from hypersensitivity were selected. The teeth with NCCL were randomly divided into the test and control groups. The teeth in the test group were restored with flowable resin; the control teeth were not restored. Six months later, the clinical examinations were repeated. The data were analyzed using the SPSS program. Results: The results were as follows: 1) NCCL occurred on 45.8% of examined teeth. The percentage of affected teeth was higher in maxillary and premolar teeth. 2) The shallow saucer type was the most common. 3) Teeth with NCCL had more gingival recession, lower attachment level, and higher incidences of bleeding on probing(BOP) and plaque than NCCL-free teeth. 4) Six months later, gingival recession, attachment level, the percentages of BOP and plaque in the test group were lower than in the control group(p<0.05). Conclusion: NCCLs were more found in maxillary teeth, especially in premolar teeth. The results suggest that the restoration of NCCL could affect some periodontal parameters favorably.

공간 인지도를 이용한 관광공간의 이미지성 구성요인 - 남이섬의 20대 및 30대 관광자를 대상으로 -

김현주,윤희정,Kim, Hyun Ju,Yun, Hee Jeong 한국조경학회 2016 韓國造景學會誌 Vol.44 No.3

본 연구는 공간 인지도 방법을 이용하여 관광공간의 이미지성 구성요인을 분석하고자 한다. 이를 위해 본 연구는 남이섬을 연구 대상지로 선정하고, 대상지를 방문한 20대 및 30대 관광자들을 중심으로 공간 인지도 자료를 수집하였다. 연구 대상지의 이미지성 구성요인에 대한 빈도분석 결과, 통로, 랜드마크, 경계 구성요인이 지구와 결절점보다 더 높게 인지되었다. 또한 본 연구는 관광공간의 경우, 자전거, 동물 등, "동적 사물"이라는 새로운 이미지성 구성요인이 존재한다는 것을 처음으로 발견하였다. 이에 따라 관광계획가나 조경설계가들은 관광공간의 이미지를 향상시키고, 이미지를 명확하게 형성하는 데 있어 이상의 이미지성 구성요인을 활용할 수 있을 것이다. This study intends to analyze the characteristics of imageability elements of the tourism space using the spatial cognitive mapping method. For this purpose, this study selects Nami Island as a study site and collects spatial cognitive maps or sketches of the study area focused on tourists in their 20s and 30s after they visit the site. The results of frequency analysis on imageability elements of Nami Island show that paths, landmarks, and edges are more frequently cognized to tourists in their 20s and 30s than districts and nodes. This study determines a new imageability element of the tourism space, "moving objects," such as or bikes or animals. Tourism planners or landscape designers can consider these useful imageability elements as important planning factors in order to improve and clarify the images of tourism spaces.

자가동영상을 활용한 디브리핑 학습의 효과: 흡인간호 실습교육을 중심으로

김현주,Kim, Hyun-Ju 한국가정간호학회 2015 가정간호학회지 Vol.22 No.1

Purpose: This study was conducted to identify the effects of a suction care self video-based debriefing-assisted learning in the fundamentals of nursing practice for nursing students on clinical performance, self-efficacy and problem-solving process. Methods: A nonequivalent control group non-synchronized design study was used and included 97 junior nursing students at P University as participants, 48 of whom were assigned to the experimental group, and 49 of whom were assigned to the control group. The outcome measurements were clinical performance for suction care, self-efficacy, and the problem-solving process. Results: The scores of clinical performance were 23.75 in the experimental group who used the materials and 21.55 in the control group, and the difference was statistically significant (p<.000). Self-efficacy was 4.30 in the experimental group and 4.18 in the control group, which was a statistically significant difference (p=.000), and the pre-to-post differences of self-efficacy was statistically significant as well (p<.001). However, there were no significant differences in the pre-to-post differences of the problem-solving process (p<.802). Conclusions: Self video-based debriefing-assisted learning may be more effective in enhancing clinical performance and self-efficacy than that of conventional practice. Whether self-efficacy will contribute to enhanced learning motivation for nursing students needs further examination.

Development and Effect of Simulation Education Program including Interdisciplinary Communication for Nursing Students

김현주,Kim, Hyun-Ju The Korea Institute of Information and Commucation 2019 한국정보통신학회논문지 Vol.23 No.10

의사소통은 간호사가 대상자와의 치료적 관계 및 다양한 직종간의 협력관계를 형성하여 성공적인 간호중재를 이끄는데 있어 중요한 요소이며 이에 간호대학생들에게 효과적인 의료인 간의 의사소통 능력 함양 할 수 있는 의사소통 교육프로그램을 개발하고 그 효과를 분석하여 간호교육 전략을 모색하고자 하였다. 연구대상은 P 대학교 간호학과 4학년에 재학중인 학생 54명이며, 연구결과, 대상자의 의사소통명확성 (t=-7.75, p<.001)과 셀프리더십 (t=-4.43, p<.001)은 유의한 차이가 있었고, 의사소통 만족도는 교육 후에 점수가 증가하였으나 유의한 차이가 없었다 (t=-1.22, p=.226). 결론적으로 SBAR를 활용한 학제간 의사소통 교육프로그램은 간호대학생의 의사소통명확성과 셀프리더십에 긍정적인 효과가 있으며 다양한 시나리오의 개발과 반복 훈련을 할 수 있는 지속인 교육개발이 필요하다. Communication is an important factor for nurses to lead successful nursing interventions by establishing therapeutic relationships with the subjects and cooperative relationships between the various occupations. The purpose of this study was to develop a communication education program to nurse college students to improve communication skills among medical professionals and to analyze the effects of the program. The subjects of this study were 54 students in the 4th grade of P nursing. The results of this study showed that there was a significant difference between the subjects' communication clarity(t=-7.75, p<.001) and self-leadership (t=-4.43, p<.001). Satisfaction with communication increased after the training but there was no significant difference (t=-1.22, p=.226). In conclusion, communication program using SBAR has a positive effect on clarity of communication and self-leadership of nursing students, and it is necessary to develop continuous education that can develop various scenarios and repeat training.

무선 인지 기술 기반의 WRAN 시스템에서 숨겨진 인컴번트 시스템 검출 MAC 프로토콜

김현주,조경진,현태인,유상조,Kim, Hyun-Ju,Jo, Kyoung-Jin,Hyon, Tae-In,Yoo, Sang-Jo 한국통신학회 2006 韓國通信學會論文誌 Vol.31 No.12b

무선 인지 기술 환경에서 CR 기지국이 숨겨진 인컴번트 시스템의 등장으로 인해 CR 사용자와 통신이 불가하고 인컴번트 사용자가 간섭을 받을 때, 이를 해결하기 위한 시그널링 방법에 관한 것으로 숨겨진 인컴번트 시스템의 검출을 위한 프로토콜을 제안한다. 특히 아웃밴드 시그널링 검출 방법을 통해 상향링크 및 하향링크 프레임 구조를 이용하여 단말의 채널상태 보고 방법과 이에 대한 기지국의 확인방법 및 절차를 제안한다. 서로 다른 CR 기지국이 공존하는 방법으로 낮은 충돌 확률로 아웃밴드 시그널링 메시지를 전송할 수 있도록 하고 이 때 주파수 사용 효율을 높이기 위해 분할 주파수 대역을 사용한다. 이를 통해 무선 인지 기술에서의 신뢰성 있고 효율적인 아웃밴드 시그널링 프로토콜을 제안한다. In this paper, we propose a inband/outband broadcast method for hidden incumbent system detection of medium access control layer for wireless regional area network systems using cognitive radio technology. Through some extra channels that are not currently used, a short message is broadcasted. The message allows CPE detecting an appearance of incumbent system to send sensing report to CR BS. For the hidden incumbent system report message, the BS needs a process or method for allocation of upstream resource to CPEs. And transmitting multiple out-band signals has a possibility to collide with out-band signals of other co-located WRAN BSs. To avoid out-band signal collision, BSs randomly select it out-band signal broadcasting time within the pre-defined explicit out-band signaling, period. And fractional Bandwidth Usage allows WRAN BSs to efficiently use bandwidth.

The Role of Receptor Activator of NF-κ Ligand in Smooth Muscle Cell Proliferation

김현주,Kim, Hyun-Ju Korean Society of Life Science 2006 생명과학회지 Vol.16 No.6

Smooth muscle cell (SMC)의 증식은 혈관성장에 의한 질환의 발병기전의 중요한 요소이다. 혈관 손상 후 SMC의 성장조절에 대한 분자적 기작에 대한 연구는 치료제 개발에 있어 중요한 의미를 지닌다. 이에, 본 연구에서는 TNF family인 RANKL가 SMC의 증식을 촉진함을 입증하였다. RANKL는 p21의 발현을 감소시키고 p21의 promoter활성을 저해함으로써 SMC의 성장을 증가시켰다. 또한 ERK와 p38 MAPK의 활성이 RANKL에 의해 증가하였으며, ERK/p38의 저해제는 RANKL에 의해 유도되는 SMC의 성장을 완전히 억제하였다. 이러한 결과는 ERK와 p38 MAPK가 RANKL에 의해 유도되는 SMC의 증식에 중요한 역할을 함을 보여주는 것이다. 즉, RANK-RANKL-ERK/p38이 SMC의 증식을 매개하는 중요 분자이며, 이들 분자는 혈관 질환을 막는 새로운 치료제 개발의 표적분자가 될 수 있음이 입증되었다. Smooth muscle cell (SMC) proliferation is important in the pathogenesis of vascular proliferative disorders. Understanding of the molecular mechanism underlying SMC growth after arterial injury would have therapeutic implications. Here we report that receptor activator of $NF-{\kappa}B$ ligand (RANKL), a member of tumor necrosis factor (TNF) family, promotes the proliferation of SMC, leading to decreased expression of p21 and enhancement of SMC growth. ERK and p38 phosphorylation was enhanced after RANKL treatment in SMC. Inhibition of ERK/p38 MAPK activity by PD98059/SB203580 completely abolished RANKL-induced proliferation of SMC, indicating ERK and p38 MAPK are essential for RANKL-induced SMC proliferation. Taken together, our findings demonstrate that RANK-RANKL-ERK/p38 pathway is important for proliferation of SMC and that these molecules may be the new therapeutic targets for the prevention of vascular diseases.