요양보호시설 이용중인 알츠하이머 치매환자의 구강 병원성 미생물 분석

정서윤,정미애,김춘성,김수관,Jung, Seo-Yun,Jeong, Mi-Ae,Kim, Chun-Sung,Kim, Su-Gwan 한국치위생학회 2022 한국치위생학회지 Vol.22 No.5

Objectives: This study aimed to identify pathogenic microorganisms in the oral cavity of Alzheimer's dementia patients and recognize the necessity and importance of oral prevention management. Methods: The participants comprised 40 dementia patients aged 60 years or older and general patients who were using nursing care facilities in Gwangju from February to July 2017. Samples were collected with Eazyperio products for oral pathogenic microbial testing. Eighteen types of bacteria could be detected by analyzing Multiplex-Quantity Real Time polymerase chain reaction at a genetic testing agency. Results: The study comprised more women than men. Most participants were in their 80s. Statistically significant differences were observed in some oral pathogenic microorganisms. Conclusions: Pathogenic microorganisms could more easily proliferate in the oral cavities of Alzheimer's dementia patients than they could among general elderly participants due to a lack of awareness of oral hygiene and prevention management. To improve this, it is considered necessary to deploy oral health care professionals.

레이놀즈 수의 시간 증가율에 따른 난류 채널유동의 변화

정서윤(Seo Yoon Jung),김경연(Kyoungyoun Kim) 대한기계학회 2016 大韓機械學會論文集B Vol.40 No.7

레이놀즈 수의 시간 증가율이 벽면난류 구조에 미치는 영향을 난류 채널유동에 대한 직접수치모사를 수행하여 조사하였다. 완전 발달된 Reτ = 180의 난류 채널유동이 가속을 받게 되어 평균속도로 무차원화된 레이놀즈 수가 5600에서 13600까지 선형적으로 변화하게 된다. 다양한 가속 시간에 대한 계산을 수행하여 벽면난류에 대한 가속율의 효과를 파악하였다. 유량의 증가율이 큰 경우에는 우회 천이와 유사한 현상이 발견되었으며, 유량의 증가율이 낮은 경우에는 우회 천이 현상이 거의 나타나지 않았다. 본 연구 결과는 초기 레이놀즈 수와 최종 레이놀즈 수의 비 보다는 레이놀즈 수의 시간 증가율이 채널내 과도유동에서의 우회 천이 현상 발생에 주요인자 임을 제시한다. Effects of the increase rate of Reynold number on near-wall turbulent structures are investigated by performing direct numerical simulations of transient turbulent channel flows. The simulations were started with the fully-developed turbulent channel flow at Reτ = 180, then temporal accelerations were applied. During the acceleration, the Reynolds number, based on the channel width and the bulk mean velocity, increased almost linearly from 5600 to 13600. To elucidate the effects of flow acceleration rates on near-wall turbulence, a wide range of durations for acceleration were selected. Various turbulent statistics and instantaneous flow fields revealed that the rapid increase of flow rate invoked bypass-transition like phenomena in the transient flow. By contrast, the flow evolved progressively and the bypass transition did not clearly occur during mild flow acceleration. The present study suggests that the transition to the new turbulent regime in transient channel flow is mainly affected by the flow acceleration rate, not by the ratio of the final and initial Reynolds numbers.

신(新)한류 지속발전을 위한 유튜브(Youtube) 한국 전통무용 콘텐츠 조사

정서윤 ( Jung Seo-youn ),안병주 ( An Byong-ju ) 한국무용예술학회 2014 무용예술학연구 Vol.46 No.1

The purpose of this study was to examine the state of Korean traditional dance contents on YouTube, which is regarded as the driving force of the new Korean wave led by K-pop, in an effort to determine what media strategies were used on YouTube to step up the advance of Korean traditional dance onto the global stage. 359 video clips were selected from YouTube by inputting the keyword “Korean traditional dance.” The selected video clips were analyzed in terms of year, number of hits, poster, content and form. The findings of the study were as follows: First, the Korean traditional dance contents were analyzed by year. As a result, there was a tendency that the number of the video clips started to be on the rise in and after 2010. But the number of the video clips posted in 2013 was lower than that of the previous year, which implied that YouTube wasn’t utilized a lot to accelerate the expansion of the Korean wave led by K-pop into Korean traditional culture. Second, the number of hits for the Korean traditional dance contents was analyzed, and the most common number of hits ranged from 1,000 to less than 10,000. Six video clips had more than 100,000 hits. So it could be said that the number of hits for the Korean traditional dance contents was low. As a result of analyzing the video clips with 10,000 hits or more by year, the number of hits increased year after year, but it seemed to be a natural phenomenon that was attributed to the lapse of time. Overall, the number of hits for the Korean traditional dance contents was low in comparison with that for K-pop contents. Third, who posted up the Korean traditional dance contents was analyzed to see whether there was any formal route for that. And it’s found that a private Korean dance group which was based in Toronto, Canada, posted up the largest number of contents, followed by individuals who continued to post up the video clips as a sort of donation. In other words, the Korean traditional dance contents were released by quite a small number of individuals and private groups through YouTube. Fourth, a content analysis was made to check the content of the Korean traditional dance contents. As a result, the Korean traditional dance contents were classified into 31 categories of content and others. Among various kinds of Korean dance, Korean fan dance was most dominant in the contents, which 80 video clips dealt with. Out of the 359 video clips, the video clips that showed Korean fan dance had the largest number of hits as well. Thus, the posting frequency was identified as one of factors to affect the number of hits. Fifth, in order to grasp the form of the Korean traditional dance contents, their format of content, length of playback, number of participants and picture quality were analyzed. As a result, the greatest number(306) of the 359 video clips were in the form of performance and presentation, and the length of playback was mostly less than seven minutes. 78 percent of the video clips were group dance, and their picture quality was good. In fact, however, the high-definition K-pop contents released by entertainment management companies for strategic purposes usually excel video clips posted up by people in general in terms of picture quality. Given this fact, the picture quality of the Korean traditional dance contents could be said to be lower.

디지털 어포던스 관련변인에 관한 메타 연구: 금융/카드사 모바일 앱을 중심으로

정서윤(Seoyoon Jung),이상원(Sangwon Lee) 대한인간공학회 2022 대한인간공학회 학술대회논문집 Vol.2022 No.4

관 내 과도 난류유동에 대한 대형와 모사

정서윤(Seo Yoon Jung),정용만(Yongmann M. Chung) 대한기계학회 2008 大韓機械學會論文集B Vol.32 No.9

Time delay effects on near-wall turbulent structures are investigated by performing a large-eddy simulation of a transient turbulent flow in a pipe. To elucidate the time delay effects on the near-wall turbulence, we selected the dimensionless acceleration parameter which was used in the previous study. Various turbulent statistics revealed the distinctive features of the delay. It was shown that the dynamic Smagorinsky model is valid to capture the alterations of the turbulence physics well. A dimensionless time for the responses of the flow quantities was introduced to give the detailed information on the delay of the nearwall turbulence. The conditionally-averaged flow fields associated with Reynolds shear stress producing events show that sweep and ejections are closely related to the delays of the turbulence production and the turbulence propagation toward the pipe center. The present study suggested that the enhanced anisotropy of the turbulence in the initial and transient stages would be a challenging problem to standard turbulence models.

고려 명종대 별기은(別祈恩) 주창자(主唱者) 술승(術僧) 치순(致純)

정서윤 ( Jung¸ Seo-yun ) 부경역사연구소 2021 지역과 역사 Vol.- No.49

別祈恩은 종교의례가 그 定例의 형태가 아닌 ‘別例’ 형태로 설행되는 의례를 가리킨다. 고려 全 시기에 걸쳐 佛·道·儒·巫 등 다양한 종교적 색채를 보이며 설행되어 온 별기은은 고려 중기 국가적 환난으로 인해 빈번히 개설되며 점차 체계화되어 고유의례로 변모하게 된다. 이 글에서는 고려 중기 별기은의 제도화·고유화를 주도했던 術僧 致純의 정체에 대해 고찰하였다. 치순은 명종대에서만 그 모습을 보이는데, 그에 대한 모든 기록에서 그가 별기은을 主唱하는 모습이 보이고 있어 주목된다. 치순의 건의로 명종 8년(1178) 別例祈恩都監이 설치되며, 이제껏 타 의례의 별례의 경우에 불과하였던 별기은에 처음으로 고유성이 부과된다. 이듬해 치순은 또 한 번의 별기은 주창 모습을 보이는데, 3년에 한 번 會慶殿에서 행해지는 것이 정례였던 백좌회를 開國寺에서 前年에 이어 다시금 別設케 한 것이다. 즉 현재까지 확인되는 치순의 모습은 오직 두 기록 뿐이지만 모두 거국적 의례를 주창하던 그의 행보를 보여주고 있으니, 명종대 별기은제행에 있어서 그의 영향력이 중대하였음은 분명한 사실이다. 비록 치순과 관련하여 유이한 두 기록만이 현전하고 있지만, 그가 술승이라는 사실과 함께 佛事와 관련한 도감 설치를 주장한 사실, 개국사에서 별기은 설행을 제안한 사실 등을 통해, 치순이 개국사 소속 승려로 짐작되며 당대 日官이었을 가능성이 있겠다. 이 글에서는 소량의 기록에서 찾아볼 수 있는 치순의 흔적을 면밀히 분석하여 그의 정체와 함께 행보 및 정치적 관계에 대해 고찰해보았다. Byeolgieun(別祈恩) refers to a case where a religious ritual is practiced in a separate form rather than in a regular form. Throughout the Goryeo period, Byeolgieun, which has various religious colors such as Buddhism, Confucianism, Taoism, and shamanism, has been practiced. In the early Goryeo Dynasty, Byeolgieun, which has outstanding exceptions, has been practiced frequently due to national hardship and gradually systematized and transformed into a unique ritual since the middle of Goryeo Dynasty. This study considered the identity of Sulseung(術僧) Chisun(致純), who led the institutionalization and uniqueness of Byeolgieun in the middle of Goryeo. Chisun appears only during the reign of King Myeongjong(明宗), and all of his records show the appearance of director Byeolgieun, drawing attention. Chisun insisted on the establishment of the Byeolryegieundogam(別例祈恩都監) in the 8th year of King Myeongjong's reign, and it imposed uniqueness on Byeolgieun, which had been only a exceptional case of other rituals, for the first time. The following year, Chisun shows another appearance related to Byeolgieun, which allowed the Baekjwahoe(百座會), which was regular to be held once every three years, to be held at Gaeguk temple(開國寺) again following last year. In other words, there are only two records of Chisun that can be confirmed during the reign of King Myeongjong, but both show a move to oversee national rituals, so it is clear that his influence was great in the performance of Byeolgieun during the reign of King Myeongjong. Although only two records remain regarding Chisun, based on the fact that Chisun was a Sulseung, the fact that he suggested the establishment of a Buddhist-related Dogam(都監), and the fact that Byeolgieun was held at Gaeguk temple, it is presumed that he was a monk belonging to Gaeguk temple and a Ilgwan(日官) at the time. This study closely analyzed Chisun's two records and examined his identity, behavior, and background of his activities.

레이놀즈 수의 시간 증가율에 따른 난류 채널 유동의 변화

정서윤(Seo Yoon Jung),김경연(Kyoungyoun Kim) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11

Effects of the increase rate of Reynold number on near-wall turbulent structures are investigated by performing direct numerical simulations of transient turbulent flows in a channel. The simulations were started with the fully-developed turbulent channel flow at Re<SUB>τ</SUB>= 180, and then temporal accelerations were applied. During the acceleration, the Reynolds number, based on the channel width and the bulk mean velocity, increased almost linearly from 5600 to13600. To elucidate the effects of flow acceleration rates on the near-wall turbulence, we selected the wide range of the duration of acceleration. Various turbulent statistics and instantaneous flow fields revealed that the rapid increase of flow rate invokes the bypass-transition like phenomena in the transient flow. By contrast, the flow evolves progressively and the bypass transition does not occur clearly during the mild flow acceleration. The present study suggested that the transition to the new turbulence in transient channel flow is mainly due to the flow acceleration rate not because of the ratio of the final Reynolds number to the initial Reynolds number.

고려시대 별기은(別祈恩)의 성격과 제행(祭行) 형태

정서윤 ( Jung¸ Seo-yun ) 한국중세사학회 2021 한국중세사연구 Vol.- No.66

This article dealt with the Byeolgieun(別祈恩)’s ritual aspect that was practiced in the whole Goryeo Dynasty. Byeolgieun was a ritual ceremony held by government and royal family in the various Gibokcheo(祈福處;a place for invoking a blessing) such as the palace, temple, mountains, rivers, and shrines etc. As Byeolgieun was the ritual representing the Goryeo Dynasty, which recognized the existence of various divinities, Byeolgieun was performed on the basis of several ideological grounds throughout the Goryeo Dynasty. According to the flow of time, it showed each ideological tone depth progressed and so Byeolgieun’s Buddhistic·Taoistic ceremony shaped in the early, middle Goryeo period, while Shamanistic tendency was stronger in the Late Goryeo period. There seems that the first Byeolgieun recording can be discovered in Byeolryegije(別例祈祭) of SImu 28, Choe Seung Ro(崔承老)’s Sangsomun(上疏文) when King Seongjong(成宗) period. Byeolgieun had already an established interpretation, that is “Eumsa(淫祀)”, means different from ritual processes and rites. But it could figure out that rites aspect regarding to the early Goryeo period Byeolgieun through trying to a new interpretation of exceptional rites such as Byeolryeyeondeunghoe(別例燃燈會)·Teukseolinwanghoe(特設仁王會). Hereafter under the unstable domestic and international conditions, Byeolgieun, which was gradually becoming more formationed and prevailed as national ritual after the establishment of a national organization related to ritual practice, GIeunsaek(祈恩色)·Byeolryegieundogam(別例祈恩都監), then from the word “Byeolgieun” being called to Gieun (contracted form) started to expand, not only in the capital town and palace but conducted ceremony in local area. As entered Yuan(元) intervention period, through the dispatch of those who are in charge the officer, Oesangieunbyoelgam(外山祈恩別監) and Gieunsa(祈恩使), Byeolgieun started to be performed in local Myeongsan(名山;authorized mountains) and temples. Oesanjegosa(外山祭告使), who performed confucianstic Sancheonje(山川祭;rites of authorized mountains and rivers), concurrently served as Oesangieunbyoelgam. When they went to the local Myeongsan for performing rites, they conveyed a decree of amnesty of the king to the local prisoners and they did lots of bad activities by using the high position as national rites officials. These Sancheonje style of Byeolgieun, Oesangieunbyoelgam conducts in the temple of the Myeongsan, can regard as the transition period before type was fixed from Buddhistic·Taoistic ceremony to Shamanistic ceremony in the Late Goryeo period. From the early 13th century, gradually appearing the Mudang(巫堂;shaman)’s ceremony much more prevailed by shamanistic trend since Yuan intervention period. In the Late Goryeo period, Mudangs participated in the politic issues directly or indirectly and using these current situation, Mudangs’ descendants and relatives took the higher status. Therefore Mudangs’ positions were much higher and Byeolgieun was fixed Shamanistic ceremony. Because Mudangs, who charged in GiuJe(祈雨祭;ritual for rain) and several private rituals in and out of the royal family, conducted the national rituals much more than ever, preventing Shamanism theory appeared. And In this circumstance, in order to distinguish “Gieun” in the previous system and separate Shamaniistic ritual formation, “Byeol” was added again then named “Byeolgieun”. Confucian scholars’ intense criticism against Shamanistic Byeolgieun, carried over Joseon, continued. Moreover several Confucian transformation made an attempt, but still remained Shamanistic ceremony.

일체형 원자로 피동잔열제거계통에 대한 성능해석

정서윤(Seo Yoon Jung),문주형(Joo Hyung Moon),강한옥(Han Ok Kang),김영인(Young In Kim) 한국유체기계학회 2014 유체기계 연구개발 발표회 논문집 Vol.2014 No.11

혈우병 A 환자의 치과 임플란트 수술 후 10년 추적 관찰

정서윤(Jung seo-yun),김훈(Kim hun),정미애(Jeong mi-ae),김수관(Kim su-gwan) 한국콘텐츠학회 2018 한국콘텐츠학회 종합학술대회 논문집 Vol.2018 No.5