이산화탄소 레이저를 이용한 모설의 치료

정다운,조은애,안형준,Jung, Da-Woon,Cho, Eunae,Ahn, Hyung-Joon 대한안면통증구강내과학회 2013 Journal of Oral Medicine and Pain Vol.38 No.2

모설(hairy tongue)은 혀의 사상유두(filiform papillae)가 과도하게 신장되어 발생하는 질환이다. 임상적으로 혀의 배면후방 1/3 부위에 주로 발생하며, 혀의 측면과 첨부에 생기는 경우는 드물다. 섭취하는 음식물과 색소유발 박테리아 등에 따라 백색에서 갈색, 검은색까지 다양한 색의 착색을 보인다. 대부분 증상이 없지만, 환자들은 주로 심미적인 문제로 병원을 찾으며, 드물게 오심, 구취, 미각이상, 불쾌한 느낌 등을 유발할 수 있다. 정확한 병인은 알려져 있지 않지만, 구강위생 관리 소홀, 구강 내 세균총의 변화, 감염, 방사선치료, 항생제, 면역 억제제 등의 사용, 과도한 음주, 흡연, 타액분비 감소 등이 소인으로 작용할 수 있다. 임상 소견이 매우 전형적이므로 육안으로도 진단이 충분히 가능하며, 생검은 필요하지 않다. 모설의 치료는 기본적인 유발요인들을 찾아서 제거해 주며, tongue cleaner 등을 이용해 혀를 부드럽게 닦아주도록 교육하고, 일부 경우에 있어서는 keratolytic agent를 사용하기도 한다. 모설 치료에 외과적 술식을 사용하는 경우는 드물지만, 유발 요인 제거 등의 다양한 치료법을 적용하였음에도 불구하고 장기간 호전이 없는 모설 환자에서, 이산화탄소 레이저(Carbondioxide laser, $CO_2$ laser)를 적용하여 효과적으로 치료한 증례를 보고하고자 한다. Hairy tongue is a disease caused by hypertrophy of filiform papillae on the tongue dorsum. Clinically, it occurs on the posterior 1/3 of the tongue dorsum and is rarely observed on the lateral and tip of the tongue. Several types of colored pigmentation from white to brown and black appear depending on the ingested food and the existing pigmentation inducing bacteria. Although clinically asymptomatic, patients will visit the clinic for esthetic problems and at rare intervals experience nausea, halitosis, dysgeusia and unpleasant sensation. The exact etiology is yet not known but causes such as inappropriate oral hygiene control, a shift in oral bacterium, infection, radiotherapy, use of antibacterial drugs or immunosuppressants, excessive smoking or alcohol drinking and decrease of salivary flow rate may be a factor of the disease. Clinical symptoms are quite typical and diagnosis may be made simply by observation, not necessarily biopsy. Treatment of hairy tongue is done by eliminating the etiology factors, brushing the tongue gently with a tongue cleaner and in some cases using keratolytic agent. Although it is rare to treat hairy tongue surgically, we will introduce a case successfully treated using carbondioxide laser($CO_2$ laser), after no sufficient improvement had been made by conservative treatment.

온벽 펄스 레이저 증착법을 이용해 합성한 Ga 도핑된 산화아연계 나노선 에탄올 가스 센서의 특성

정다운,김경원,이득희,김상식,이상렬,Jung, Da-Woon,Kim, Kyoung-Won,Lee, Deuk-Hee,Debnath, Pulak Chandra,Kim, Sang-Sig,Lee, Sang-Yeol 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.7

We have investigated the sensing properties of ethanol gas sensor with pure ZnO and Ga-doped ZnO nanowires on Au coated (0001) sapphire substrates grown by hot walled pulsed laser deposition. Randomly aligned ZnO nanowires arrays were grown on a Au-electrode patterned under ambient conditions. ZnO nanowires have various sizes and shapes with a different substrate position inside a furnace. The average of length and diameter of the ZnO nanowires were $8\;{\mu}m$ and 100 nm respectively, and confirmed by field emission scanning electron microscopy. Sensitivity chanege characterization of the gas sensor was found that measured sensitivities of the ethanol gas sensors were 83.3% and 68.3% at $300^{\circ}C$ respectively.

치성 점액종 환자의 총의치 수복증례

정다운,김현희,배정윤,Jeong, Da-Woon,Kim, Hyun-Hee,Bae, Jung-Yoon 대한치과보철학회 2018 대한치과보철학회지 Vol.56 No.1

치성점액종은 악골에 드물게 발생하는 양성 치성 종양이다. 본 증례의 60대 무치악 남성은 전상악부에 발생한 연조직 종괴 제거를 주소로 내원하였으며 절제 생검 결과 치성 점액종으로 확진되었다. 외과적 제거 후 잔존한 가동조직의 변형을 최소화 하기 위해 고안된 투명 레진 트레이로 인상을 채득하였다. 악간관계기록 및 납의치 시적시에 중립대 영역을 설정하고 기능적 연마면 형태를 인기하여 총의치의 안정성과 유지력을 증진시킬 수 있었다. 치성 점액종 제거 후 가동조직과 중립대를 고려하여 심미적, 기능적으로 만족스러운 총의치를 제작하였기에 이를 보고하는 바이다. Odontogenic myxoma of the jaws is a rare benign odontogenic tumor. In this case, a 61-year-old male patient had a chief complaint about maxillary anterior gingival mass and excisional biopsy result confirmed odontogenic myxoma. The clear acrylic resin custom tray was designed to minimize displacement of flabby tissue which remained after the surgery. Neutral zone and external impression technique could provide satisfactory result in terms of denture stability and retention during jaw relation record and wax denture try-in procedure. This clinical report describes fabrication of complete dentures for a patient with odontogenic myxoma in regard to flabby tissue and neutral zone.

그레인저 인과성 분석을 이용한 정상인과 수면무호흡증 환자의 수면 중 압수용기 반사 효과의 평가

정다운,김상경,김고근,이유진,정도언,박광석,Jung, Da Woon,Kim, Sang Kyong,Kim, Ko Keun,Lee, Yu-Jin,Jeong, Do-Un,Park, Kwang Suk 대한의용생체공학회 2014 의공학회지 Vol.35 No.4

The baroreflex is one kind of homeostatic mechanisms to regulate acute blood pressure (BP) changes by controlling heartbeat interval (HBI). To quantify the effect of baroreflex, we suggested a new approach of analyzing Granger causality between systolic BP (SBP) and HBI. The index defined as baroreflex effectiveness (BRE) was generated by the hypothesis that more effectual baroreflex would be related to more effective Granger causal influence of SBP on HBI. Six obstructive sleep apnea (OSA) patients (apnea-hypopnea index, AHI ${\geq}5$ events/hr) and six normal subjects participated in the study. Their SBP and HBI during nocturnal sleep were obtained from a non-invasive continuous BP measurement device. While the BRE ($mean{\pm}SD$) of normal subjects was $47.0{\pm}4.0%$, OSA patients exhibited the BRE of $34.0{\pm}3.8%$. The impaired baroreflex function of OSA patients can be explained by the physiological mechanism associated with recurrent hypoxic episodes during sleep. Thus, the significantly lower BRE in OSA patients verified the availability of Granger causality analysis to evaluate baroreflex during sleep. Furthermore, the range of BRE obtained from normal subjects was not overlapped with that obtained from OSA patients. It suggests the potential of BRE as a new helpful tool for diagnosing OSA.

모바일 증강현실 기술을 이용한 역사관광정보 서비스에 관한 연구

정다운,강영옥,Jung, Da-Woon,Kang, Young-Ok 한국공간정보학회 2012 한국공간정보학회지 Vol.20 No.2

정보통신과 IT기술의 발달 특히 스마트폰의 대중화는 정보의 검색과 제공에 큰 가능성을 열었으며 요즘 주목받고 있는 증강현실 기술은 이용자가 실제로 보고 있는 지역의 현장 모습에 추가적인 정보를 제공함으로써 혁신적인 방식의 정보취득을 가능케 하였다. 본 연구에서는 역사관광정보를 스마트폰을 이용하여 효율적으로 전달하기 위한 방안으로 증강현실 기술을 이용한 모바일 어플리케이션 서비스를 설계 및 구현하고 현장에서 테스트하였다. 연구수행결과, 역사관광정보 서비스를 위해서는 수집된 컨텐츠별로 가장 정확하게 정보가 제공될 수 있는 뷰포인트를 찾아야 하고, 이를 효율적으로 제공하는 기능이 필요한 것으로 판단되었다. 본 연구는 스마트폰을 이용하여 일반 업체들에서 연구되고 있는 기술을 공공적인 영역이라고 할 수 있는 지역의 역사관광정보를 제공하는 서비스에 적용하고 구현하여 그 가능성을 탐색하였다는데 의의가 있으며, 이미지 증강 분야에서 향후 더 발달된 증강현실 기술을 적용한 서비스를 제공하기 위한 기초가 될 수 있을 것으로 판단된다. Advances in science and technology, especially the increasing popularity of smart phone has opened up infinite possibilities for the information retrieval. And the augmented reality technology which has started getting attention to various fields has allowed us to get an information in an innovative way by providing additional information to a real world before our eyes. The purpose of this study is to suggest and to construct mobile application service which give history-tourism information efficiently based on augmented reality technology. As a result of study, we suggest that it is needed to find the view point that the most accurate information can be provided to the users according to each contents such as maps, pictures, drawings etc. and to provide the function to the users which shows the view points information efficiently. The purpose of this study is to investigate the possibility whether the technology studied in private sector by using augmented reality based on smart phone can also be applied in public sector for the service of history tourism information. We expect that this study can be the basis for providing the more advanced augmented reality service in the near future.

피부전기활동을 이용한 실시간 깊은 수면 검출 알고리즘의 개발

정다운,최상호,주광민,이유진,정도언,박광석,Jung, Da Woon,Choi, Sang Ho,Joo, Kwang Min,Lee, Yu Jin,Jeong, Do-Un,Park, Kwang Suk 대한의용생체공학회 2015 의공학회지 Vol.36 No.5

Although many studies have analyzed the relationship between electrodermal activity (EDA) and sleep stages, a practical method for detecting sleep stage using EDA has not been suggested. The aim of this study was to develop an algorithm for real-time automatic detection of deep sleep using the EDA signal. Simultaneously with overnight polysomnography (PSG), continuous measurement of skin conductance on the fingers was performed for ten subjects. The morphometric characteristics in the fluctuations of EDA signal were employed to establish the quantitative criteria for determining deep sleep. The 30-sec epoch-by-epoch comparison between the deep sleep detected by our method and that reported from PSG exhibited an average sensitivity of 74.6%, an average specificity of 98.0%, and an average accuracy of 96.1%. This study may address the growing need for a reliable and simple measure for identifying sleep stage without a PSG.

온도상승에 따른 배선용 차단기의 동작특성에 관한 연구

정다운 ( Da Woon Jung ),김재호 ( Jae Ho Kim ) 한국안전학회(구 한국산업안전학회) 2015 한국안전학회지 Vol.30 No.5

Molded Case Circuit Breakers (MCCBs) are typically used to provide over current protection for electrical safety caused by short circuit faults and overloads in indoor low voltage power systems. The MCCB automatically connects and disconnects loads from the electrical source when the current reaches a value and duration that will cause an excessive. However, the MCCB sometimes is not interrupted due to a malfunction, nuisance tripping, or in a fire. Ensuring electrical safety is very important in a indoor low voltage power system. This paper presents the operating characteristics of MCCBs according to a temperature rise from room temperature to 160 degrees Celsius delivered by a radiant panel heater. The ABS 54c(rated current: 30A) of the hydraulic magnetic trip type was used in the experiments. The signals of temperature, voltage, and current were measured using the high accuracy Signal Conditioning Extensions for Instrumentation (SCXI) measurement system with the LabVIEW program manufactured by National Instruments. The operating characteristics were measured as functions of current amplitude and ramp-up rate. The MCCB tripping time decreased as a result of increasing current amplitude and ramp-up rate under a temperature rise condition, because the temperature and level of the current are directly proportional to the tripping time. Additionally, an instantaneous operation was observed after 8 times of the rated current, and the MCCB began to melt a surface temperature of around 300 degrees Celsius of. The experimental results coincided well with the operating curve.

온도에 따른 배선용차단기의 동작 특성

정다운(Da-Woon Jung),김병조(Byeong-Jo Kim),김재호(Jae-Ho Kim) 한국조명·전기설비학회 2015 한국조명·전기설비학회 학술대회논문집 Vol.2015 No.5

살풀이춤이 갖는 성격 이미지 탐색

정다운 ( Da Woon Jung ),김승철 ( Seung Chul Kim ) 한국스포츠심리학회 2011 한국스포츠심리학회지 Vol.22 No.3

본 연구는 살풀이춤에 내재된 이미지를 대단위 성격특성용어를 통해 탐색하고, 살풀이춤에 내재된 성격이미지 구조를 탐색하는데 목적이 있다. 이에 살풀이춤 이수자 10명을 대상으로 살풀이춤의 성격 이미지를 잘 설명하는 성격특성용어를 추출하였으며, 120명을 대상으로 성격 이미지의 구조적 다차원성을 알아보기 위한 일련의 탐색적 요인분석과 확인적 요인분석을 수행하였다. 분석결과 95개의 살풀이춤 성격 이미지 용어는 10개 요인의 50용어로 압축되었으며, 최종적으로 7개요인 21용어가 확인되었다. 나아가 7개 요인에 대한 위계적 특성을 분석한 결과, 살풀이춤이 갖는 성격 이미지는 정서적 역동성과 형식적 정련성의 위계적 모형 구조가 단일차원 및 고차원 모형에 비하여 타당한 모형으로 확인되었다. This study aims to investigate character image embedded in Salpulyi dance by extracting character image experienced in Salpulyi dance performances with image characteristic terminology. To this end, we have extracted personality characteristic term from 10 Salpulyi dance majors, and carried out a series of exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) aimed at 120 people to explore multi-dimensional structure in Salpulyi dance image character. Through these analytical researches, 95 Salpulyi dance personality characteristic terms are found to have connotations of 10 factors and 50 terms which were eventually resolved into 7 factors and 21 terms. In addition, it was verified that personality characteristic structure inherent in Salpulyi dance can be better explained by hierarchical structure model with an emphasis on vitalizing nature of tension and relaxation, rather than first-order or other higher-order structure model. Finally, we compared our results of a hierarchical characteristics in Salpulyi dnace image character with those of previous studies, and discussed the emotional dynamic and ceremonial good training of Salpulyi dance image.

살풀이춤에 내재된 표현정서와 체험정서의 개념적 구조

정다운 ( Da Woon Jung ),김승철 ( Seung Chul Kim ),성창훈 ( Chang Hoon Seong ) 한국스포츠심리학회 2013 한국스포츠심리학회지 Vol.24 No.1

본 연구는 살풀이춤에 내재된 정서의 구조를 탐색하고, 살풀이춤 정서를 표현하는 무용수와 이를 체험하는 관객의 정서 차를 검증하였다. 이에 453명의 연구대상자를 표집하여, 연구절차와 자료분석에 기초한 연구결과를 도출하였다. 연구결과 살풀이 춤 정서는 호감, 애정, 매혹, 애절, 고통, 상실, 고독, 냉담, 전율의 9개의 개별정서 구조를 내재하고 있으며, 이는 각각 3개의 개벌정서를 포함한 사랑, 탄식, 성찰의 복합정서로 위계화되었다. 또한, 한의 고차원적 정서 특성을 보인 살풀이 춤 정서는 무용수와 관객간 차이를 보여주었다. 마지막으로, 무용수는 살풀이춤을 출 때 애정정서를 높은 강도로 표현하였으며, 관객은 살풀이춤을 보고 호감, 고통, 고독, 전율 정서를 경험하는 것으로 확인되었다. 따라서 이러한 결과를 정서의 이론적 배경과 살풀이 춤 특성에 기준하여 논의하였다. This study was conducted to explore the structure of emotion inherent in Salpuri dance and verify the emotional differences between a group of dancers expressing the emotion of Salpuri dance and a group of audience experiencing the performance. Thus, by sampling a total of 453 research subjects, this study drew research results based on the research procedure and data analyses. It was found there is a structure of 9 individual emotions inherent in Salpuri dance, such as likability, affection, attraction, mournfulness, anguish, loss, solitude, indifference and thrill, and this study investigated those 9 factors in 27 items. When analyzing confirmatory factors to verify the goodness-of-fit, this study found out that each model had a hierarchy of three complex emotions, love, moan and introspection. Lastly, when verifying differences in the emotional structure inherent to Salpuri dance between the two groups, this study found out that dancers expressed the emotion of affection in high intensity when dancing Salpuri dance, while audience experienced such emotions as likability, anguish, solitude and thrill when seeing the performance of Salpuri dance. The results of this study were discussed on the basis of the theoretical background of emotion and the characteristics of Salpuri dance. Besides, it was explained in a high-dimensional way that Salpuri dance typically possesses ``Han (deep-rooted grudge)`` which is the intrinsic emotional feature of the Korean people.