수종의 치근면 처치 방법에 따른 상아질 지각 과민 변화 및 표면 특성에 관한 연구

권순영,임성빈,정진형,Kwon, Soon-Young,Lim, Sung-Bin,Chung, Chin-Hyung 대한치주과학회 1999 Journal of Periodontal & Implant Science Vol.29 No.1

Exposure of the root surface due to gingival recession after periodontal surgery, elicit pain response when exposed to mechanical, heat, chemical or osmotic irritation. Especially patients treated with periodontal surgery, show high frequency. There have been reports that the 1 out of 7 patients complains of dentinal hypersensitivity. There have been many studies on the clinical effects of various materials on the treatment of dentinal hypersensitivity. The purposes of this study were to evaluate the effect of sodium chloride and potassium oxalate and to observe the relationship between the dentinal hypersensitivity and surface characteristics such as dentinal tubule size and number. This study included 20 teeth which were scheduled for extraction and had no pulpal disease. These teeth were divided into Root planing group, EDTA group, NaCl group and Oxalate group. Dentinal hypersensitivity is measured by tactile, pressured air and cold water using NRS (Numerical Rating Scales). Teeth were extracted under local anesthesia and each specimen was sectioned to a size about 3 X 5 mm and was examined under the scanning electron microscope (X2,000) The results were as follows, 1. The EDTA group exhibited significantly increased dentinal hypersensitivity comparing with the other groups. 2. The NaCl and Oxalate groups showed significantly reduced dentinal hypersensitivity comparing with the EDTA group. 3. As a method for dentinal hypersensitivity measurement, it was presumed thet tactile sensitivity test was not sensitive method but air blast test and cold water test were adequate method. 4. In a SEM study, the root planing group exhibited amorphous smear layer and showed no dentinal tubule orifice, but the EDTA group showed the large number of dentinal tubules. On the other hand, the NaCl and Oxalate groups did not show exposed dentinal tubules. The NaCl group showed more rough root surface than the EDTA group, and the Oxalate group showed many participates to be presumed as calcium oxalate particle. As the results from this study, root planing couldn't expose the dentinal tubule and NaCl and potassium oxalate occluded exposed dentinal tubule effectively. Dentinal hypersensitivity has close relationship with the exposure of dentinal tubules, especially with it's size and number.

반도체 레이저의 이득스위칭을 이용한 UWB 임펄스 발생기 설계

권순영,김범주,박종대,Kwon Soon-young,Kim Bum-in,Park Chong-dae 대한전자공학회 2005 電子工學會論文誌-TC (Telecommunications) Vol.42 No.6

본 논문에서는 Step recovery diode와 반도체 레이저의 이득 스위칭을 이용하여 UWB(Ultra Wide Band) 통신 시스템의 구성요소 중 하나인 임펄스 발생기를 설계하였다. 구현된 임펄스 발생기는 4부분으로 구성하였으며, 1번째는 SRD를 이용하여 반도체 레이저의 이득스위칭을 위한 1차 임펄스 발생기, 2번째는 출력된 1차 임펄스를 이득 스위칭을 조건에 맞추기 위한 전류조절기, 3번째는 1차 임펄스 발생기에서 출력된 임펄스를 반도체 레이저의 이득 스위칭을 이용하여 가우시안 펄스를 발생하는 2차 임펄스 발생기, 4번째는 구현된 가우시안 펄스를 UWB를 위한 가우시안 모노펄스로 변환하는 펄스 변환부로 구성되어 있다. 측정된 가우시안 모노펄스는 시간상에서 360 psec의 펄스폭과 -70 mV에서 +50 mV의 크기를 가지며, 주파수상에서 -41 dBm의 크기와 3.6 GHz의 대역폭을 가짐으로써 UWB를 위한 임펄스에 적합함을 확인하였다. In this paper, we implemented a impulse generator, the one of the part in UWB(Ultra Wide Band) system using step recovery diode(SRD) and gain-switced semiconductor laser. The impulse generator was consisted of four stages; The first stage used SRD to generate the first impulse for gain switching. The second stage controled current for the suitable gain switching condition. The third was the second impulse generator to generate gaussian pulse. For gain switching, the first impulse was applied to semiconductor laser. In the last stage the gain switched impulse was converted into mono-gaussian pulse. The measured mono-gaussian pulse was 360 psec pulse-width and $-70mV \~ +50mV$ amplitude in time domain. In frequency domain its magnitude and bandwidth was, respectively, -41dBm and 3.6GHz. Accordingly, the impulse generator that we suggested was suitable for UWB systems.

준혐기 / 호기 생물막공정에 의한 수산물 가공폐수 처리

권순영,유성환,우영국 ( Soon Young Kwon,Sung Whan Yo,Young Gug Woo ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.1

The combined process of biofilm and suspended growth type for denitrification was used to treat seafood processing wastewater containing high organic and nitrogen compounds. The reactors were made by transparent prexiglass and consisted of the two sequent anoxic and oxic basins for nitrification and denitrification. Wastewater for experiment was supplied from collecting reservoir at industrial wastewater treatment plant twice a week. Concentration of wastewater was ranged in the TCOD of 4,000∼5,500㎎/l, TSS of 3,000∼5,000㎎/l, TKN of 500∼600㎎/l, T-P of 197∼275㎎/l and Temperature of 14℃∼29℃. In order to get stable efficiency, the experiment was operated for 180 days. During experiment the efficiency was shown stably in treating organic and nitrogen compounds. The results were as follows: 1) Most of organic materials were removed at the first anoxic reactor, but nitrogen compounds were removed at the second oxic reactor. 2) The efficiency for organic and nitrogen treatment were 93% and 86%, respectively at the organic volumetric loading rate of 0.75KgTCOD/㎥·d and nitrogen volumetric loading rate of 0.1KgTKN/㎥·d. 3) At predenitrification process, the nitrogen was removed above 90% at the loading rate of 0.3∼1.2KgN/㎥· d, but removed in the range of 20∼60% at 0.15∼0.6KgN/㎥·d at the post-denitrification process. 4) The removal efficiency in the organic volumetric loading rate of 0.75KgTCOD/㎥·d was higher than that of 0.50KgTCOD/㎥·d on the temperature of 26℃∼29℃. Consequently, the denitrification process of this study will get the satisfied effluent below the effluent limit of BOD 30㎎/l if the reactor be designed at the loading rate of 0.6KgBOD/㎥·d and HRT=3days without addition of extra-Carbon source.

원격전이를 동반한 선양낭포암에 대한 고찰

권순영,김형진,조성동,백승국,정광윤,최건,최종욱,Kwon, Soon-Young,Kim, Hyung-Jin,Jo, Sung-Dong,Baek, Seung-Kuk,Jung, Kwang-Yoon,Choi, Geon,Choi, Jong-Ouck 대한기관식도과학회 2001 大韓氣管食道科學會誌 Vol.7 No.1

Background and Objectives: Adenoid cystic carcinoma (ACC) is an aggressive, often indolent tumor, with a high incidence of distant metastasis (DM). Relatively little has been written about the factor that influence distant spread and subsequent survival because it is uncommon and has protracted clinical course. We attempted to reemphasize the biologic behavior of ACC by investigating the relationship between the clinical features and prognosis. Materials and Methods : We have retrospectively studied 24 determinate patiens who received definitive treatment in our hospital between 1984 and 1995 for ACC in all salivary sites. Inclusion criteria were no prior treatment elsewhere other than excisional biopsy and eligibility for follow-up of at least 5 years. Variables assessed for their impact on distant metastasis included age, gender, size, node status, stage, histologic pattern, locoregional treatment failure. Results : Treatment failure occurred in a total of 16 of 24 determinate Patients (64%), 12 of whom had DM (50%). This was usually associated with locoregional recurrence (8 patients), but DM was the only indication of failure in 4 whose primary tumor was controlled. Of the 12 patients with known DM, the lung was recored as the only involved site in 7 Patients, lung was involved in addition to other sites in 1, bone and liver metastasis occurred in 2 respectively. Disease-free intervals varied from 3 month to 14 years (median 3 years). The only significant factors influencing survival were the size of the primary tumor, locoregional recurrence. Conclusion : The high incidence of DM with locoregional failure confirms the importance of aggressive initial surgery. combined with irradiation, for high-stage tumors or involved surgical margins. Large tumor size and locoregional recurrence, rather than microscopic appearance, were predictive of DM.

수요자원 거래시장 참여를 위한 가상발전소 최적 운영 기법에 관한 연구

권순영(Soon-Young Kwon),조형철(Hyung-Chul Jo),조경희(Kyeong-Hee Cho),변길성(Gilsung Byeon),이예림(Ye-Rim Lee),김종율(Jong-yul Kim) 한국통신학회 2023 한국통신학회 학술대회논문집 Vol.2023 No.6

계층별 전력 수준에 따른 3 계층 LDM-MIMO 시스템의 중간 계층 BER 성능 분석

권순영(Soon-Young Kwon),김호재(Ho Jae Kim),배재휘(JaeHwui Bae),허남호(Namho Hur),김형남(Hyoung-Nam Kim) 한국통신학회 2020 한국통신학회 학술대회논문집 Vol.2020 No.2

요추부 척추관 협착증 치료를 위한 요추부 극돌기 삽입술의 추간판 내 압력 분포 변화에 관한 생체역학적 분석

권순영(Soon-Yong Kwon),전성철(Sung-Chul Jun),문수정(Soo-Jung Moon),탁계래(Gye-Rae Tack),이성재(Sung-Jae Lee),신규철(Kyu-Cheol Shin) 대한정형외과학회 2007 대한정형외과학회지 Vol.42 No.6

목적: 요추부 척추관 협착증 치료를 위한 여러 형태의 요추부 극돌기 spacer 중 가장 초기 형태인 골시멘트 spacer 삽입에 따른 추간판의 생체역학적 압력 변화를 분석하고자 하였다. 대상 및 방법: 시편으로는 생후 2주일 미만의 송아지 요추 다분절 (Ll-L5) 6개를 이용하였다. 각각 3개의 시편을 정상군과 요추 3-4번 극돌기 사이에 골시멘트 12 mm 원형 spacer를 삽입한 시술군으로 구분하였다. 압축 하중 (700 N) 및 신전 하중 (700 N+7.5 Nm) 하에서 압력센서를 이용하여 정상군과 시술군의 요추 2-3번, 3-4번, 4-5번 사이의 전방 섬유륜, 수핵, 후방 섬유륜, 후측방 섬유륜에서의 압력을 측정하였다. 결과: 정상 시편의 경우 압축 하중에 비해 신전 하중 시 후방 부위 섬유륜내의 압력이 증가하는 양상을 나타내었다. 그리고 spacer를 삽입한 후 압축 하중 및 신전 하중에서 인접한 추간판(L2-L3, L4-L5)의 압력 변화는 정상군과의 비교 시 통계학적으로 유의한 차이를 보이지 않았다(p>0.05). 하지만 신전 하중 하에서, 정상군의 요추 3-4번 사이의 수핵, 정 후방 섬유륜, 후 측방 섬유륜에서의 압력이 l.48±0.27 MPa, l.42±0.21 MPa, 1.71±0.56 MPa로 나타난 것에 비해, 시술 후 압력이 1.11±0.18 MPa, 0.96±0.31 MPa, 1.08±0.14 MPa로, 수핵의 경우 25%, 정 후방 섬유륜에서는 31.7%, 후 측방 섬유륜에서는 36.8%의 감소율을 보였고, 통계학적인 유의한 차이를 나타내었다(p<0.05). 결론: 신전 하중 하에서의 압력의 감소 효과는, 요추부의 신전을 유발하는 자세에 따라 증상이 나타나는 요추부 척추관 협착증의 원인으로 알려진 추간판의 팽륜의 감소를 유발할 것으로 사료된다. 또한 기존 내고정 장치를 이용한 시술 부위의 너무 강한 융합은 인접한 추간판에서의 퇴행화를 가속화 시킨다고 보고 되었다. 또한 시술 후 인접한 추간판내 압력의 경우 정상군의 결과와 유의한 차이가 없었으며, 이는 spacer의 삽입술이 인접한 추간판의 생체 역학적 역할에 변화를 유발하지 않을 것으로 사료된다. Purpose: To assess the biomechanical effects and effectiveness of an interspinous spinal spacer (ISS) on the intradiscal pressure using in vitro biomechanical tests. Materials and Methods: Six calf spine specimens (less than 2 weeks of age, L1-L5) were divided to two groups the intact and the surgery groups (n=3 each). For the surgery group, an ISS made from PMMA (Greek pi=12-mm) were inserted into the space between the spinous processes of L3-L4. The intradiscal pressures at the various regions of the annulus (anterior, posterior, and posterolateral locations) and the nucleus pulposus were measured using the four pressure transducers under pure compression (700 N) and extension loads (700 N+7.5 Nm). Results: An increase in pressure was observed from neutral to extension at the posterior and posterolateral annulus. After inserting the ISS, the changes in pressure at the adjacent disc levels (L2-L3, L4-L5) were negligible regardless of the loading conditions (p>0.05). However, at the implanted level (L3-L4) statistically significant changes in the pressure were found under extension loading at the nucleus pulposus, posterior and posterolateral regions of the annulus with a pressure drop from 1.48 MPa, 1.42 MPa, 1.71 MPa to 1.11 MPa, 0.961 MPa, 1.08 MPa, at the respective locations (p<0.05). The relative percentage decrease were 25%, 31.7%, and 36.8%. Conclusion: On the implanted level, these results showed that the insertion of the ISS with PMMA can effectively reduce the intradiscal pressures by at least 25% quite uniformly over the intraver-tebral disc during extension. More effective reduction was observed at the posterolateral location. The pressure changes at the adjacent levels were negligible in contrast to the abnormal pressure changes that are frequently reported after conventional rigid fusion. This suggests that the likelihood of adjacent level degeneration after surgery can be minimized using the ISS insertion.

단파 대역에서 Kurtosis를 활용한 블라인드 등화 성능 분석

권순영(Soon-Young Kwon),김호재(Ho Jae Kim),김형남(Hyoung-Nam Kim) 대한전자공학회 2021 대한전자공학회 학술대회 Vol.2021 No.6

학교기반 아동학대 개입 모형 개발

권순영(Kwon, Soon-Young),유형근(Yu, Hyeong-Keun) 학습자중심교과교육학회 2013 학습자중심교과교육연구 Vol.13 No.4

본 연구는 아동학대의 문제를 학교 내의 전문 인력들이 협력적으로 개입하고 외부의 전문기관과 연계하여 체계적으로 개입할 수 있는 학교기반 아동학대 개입모형을 개발하는데 그 목적이 있다. 모형구안과 효과검증의 과정을 5단계로 나누어 제시하면 다음과 같다. 첫째, 조사단계에서는 기존의 아동학대 개입방식의 문제점과 학교기반 위기개입 모형의 문제점을 분석하고 이를 보완할 수 있는 개입단계를 제시하였다. 둘째, 분석 및 설계단계에서는 포커스 그룹 인터뷰를 실시한 후 그 결과를 바탕으로 아동학대 개입팀 구성원의 역할을 추출하여 모형 초안을 완성하였다. 셋째, 타당화단계에서는 전문가 자문내용을 바탕으로 모형 초안을 수정ㆍ보완하였다. 넷째, 적용단계에서는 구안된 학교기반 아동학대 개입 모형을 피학대 아동에게 적용하였으며, 마지막으로 효과분석단계에서는 적용의 결과를 행동관찰, 포커스그룹 인터뷰 등을 분석하여 개입모형에 대한 효과를 검증하였으며 그 결과 아동학대 문제에 대한 개입의 효율성이 높은 것으로 나타났다. The purpose of this study was development of school-based child abuse intervention model. As child abuse event has been increased, the importance and need child abuse intervention has been increased. This school-based child abuse intervention model follows five steps. First, it reviewed about studies on the child abuse intervention process and school-based crisis intervention model. Second, it analyzed result of focus group interview and it designed child abuse intervention model by process and participant roles. Third, it validated final model by expert advice. Forth, it applied prevention, intervention readiness, intervention, post monitering as a school-based child abuse intervention model. Fifth, it verified by contents analysis, teacher s observation and Focus group interview. The result of the study is as follows; first, it was discussed prevention, intervention readiness, intervention, post monitering as a school-based child abuse intervention process And it was explained about roles of teacher, school counselor, school nurse as school-based child abuse intervention team. Second, the result of applied and verified the model show us that school-based child abuse intervention model can be used efficient for improvement of child abuse prevention, recognition and intervention. And, it can be used efficient for positive change of abused child s, improvement of understanding, pooling information about child abuse and communication among member in school.

영구치아의 근원심폭경 및 치열궁 크기에 관한 연구

권순영(Soon Young Kwon),이동주(Dong Joo Lee) 조선대학교 구강생물학연구소 1987 Oral Biology Research (Oral Biol Res) Vol.11 No.-

.