淸道地域 靑銅器時代 住居構造의 變遷에 대하여

박달석(Park Dahl-Seok) 계명사학회 2006 계명사학 Vol.17 No.-

This paper intends to identify the transition aspects and characteristics of each phase of dwelling structure through bronze age pit-dwellings excavated in Chung-do region. It could be established that bronze age pit-dwellings excavated in Chung-do region pass through four phases of transition process based on the plane figure and the inner facilities. The dwelling structures of each phase had changed in gradual with strongly remained attributes of the prior phase. These aspects are also noticed in Chung-do~Gyoung-san~Dae-gu~Sang-ju region. In the settlements of Chung-do region. long-rectangle formed dwellings were occupied and distributed in a certain individual space. And in the phase of rectangle formed dwellings, there seems the transition in settlement structure. Rectangle formed dwellings, as compared with long-rectangle formed dwellings, were getting lower in terms of space occupation rates and were gathered by two or three for a group. And as the population had grown gradually, the form of dwellings had advanced to the coner-less rectangle or circle. The coner-less rectangle or circle formed dwellings had been in a transition which had small dimension but the enlarged scale of the settlements. This transition may mean the change of economic unit according to change of economic activity pattern-the establishment of rice farming. Moreover, this transition also shows that extended family system had branched out nuclear family which was going through household community. and that the initiative of the settlement was belonged to not a certain group but individuals. Thus, these aspects could be understood that from that moment on the settlements were on the process from extended family system to nuclear family.

Arbuscular mycorrhiza의 접종방법 및 인산시용량이 고추(Capsicum annum L.)의 초기생장에 미치는 영향

박향미(Hyang-Mee Park),강항원(Hang-Won Kang),강위금(Ui-Gum Kang),박경배(Kyeong-Bae Park),이상선(Sang-Sun Lee),송승달(Sung-Dahl Song) 한국토양비료학회 1999 한국토양비료학회지 Vol.32 No.1

강도변조방사선치료의 환자별 정도관리

신경환(Kyung Hwan Shin),박성용(Sung-Yong Park),박동현(Dong Hyun Park),신동호(Dongho Shin),박달(Dahl Park),김태현(Tae Hyun Kim),표홍렬(Hongryull Pyo),김주영(Joo-Young Kim),김대용(Dae Yong Kim),조관호(Kwan Ho Cho),허순녕(Sun Nyung Huh 대한방사선종양학회 2005 Radiation Oncology Journal Vol.23 No.3

목 적: 환자별 강도변조방사선치료 정도관리(IMRT QA) 중 필름 선량계를 임상에 적용하고, 필름 등선량중심점 치 우침 교정 최적화법을 개발하였다. 최적화 후 필름 선량계에 대한 정량적 허용기준도 제시하고자 하였다. 대상 및 방법: IMRT 치료를 시행하기로 한 14명의 두경부종양 환자에서 필름 선량계를 시행하고, 가장 큰 계통적 오차 요인인 필름 등선량중심점 치우침 교정 최적화법을 고안하여 적용하였다. 결 과: 필름 선량계의 필름 등선량중심점 치우침 교정 최적화법은 local minimum을 구하는 방식으로 고안하였으며, 환자에게 적용 시 조정값은 2 mm를 보인 2명을 제외하고 12명에서 1 mm로 나타났다. 필름 등선량중심점 치우침 교정 최적화 전후로 선량오차 결과를 산출하였으며, 최적화 전후의 절대 평균 선량오차의 평균은 각각 2.36%,1.56%, 점선량오차가 5% 이상인 지점의 비율은 평균은 각각 9.67%, 2.88%로서 최적화 후 선량오차가 현저히 감소하였다. 최적화 후 절단 저선량 영역을 설정하였으며, 최적화 후 5% 이상의 점선량오차 지점 수 10% 미만, 절대 평균 선량오차 3% 미만의 필름 선량계를 위한 정량적 허용 기준을 제시하였다. 결 론: 본 연구에서 개발한 최적화법은 필름 선량계의 치우침 교정에 매우 유효하며, 최적화 후 제시된 정량적 허용 기준은 환자별 IMRT QA에 유용하게 사용될 수 있을 것으로 기대된다. Purpose: Film dosimetry as a part of patient specific intensity modulated radiation therapy quality assurance (IMRT QA) was performed to develop a new optimization method of film isocenter offset and to then suggest new quantitative criteria for film dosimetry. Materials and Methods: Film dosimetry was performed on 14 IMRT patients with head and neck cancers. An optimization method for obtaining the local minimum was developed to adjust for the error in the film isocenter offset, which is the largest part of the systemic errors. Results: The adjust value of the film isocenter offset under optimization was 1 mm in 12 patients, while only two patients showed 2 mm translation. The means of absolute average dose difference before and after optimization were 2.36 and 1.56%, respectively, and the mean ratios over a 5% tolerance were 9.67 and 2.88%. After optimization, the differences in the dose decreased dramatically. A low dose range cutoff (L-Cutoff) has been suggested for clinical application. New quantitative criteria of a ratio of over a 5%, but less than 10% tolerance, and for an absolute average dose difference less than 3% have been suggested for the verification of film dosimetry. Conclusion: The new optimization method was effective in adjusting for the film dosimetry error, and the newly quantitative criteria suggested in this research are believed to be sufficiently accurate and clinically useful.

Generation of hybrid sinograms for the recovery of kV-CT images with metal artifacts for helical tomotherapy

Jeon, Hosang,Park, Dahl,Youn, Hanbean,Nam, Jiho,Lee, Jayoung,Kim, Wontaek,Ki, Yongkan,Kim, Yong Ho,Lee, Ju Hye,Kim, Dongwon Published for the American Association of Physicis 2015 Medical physics Vol.42 No.8

自動速度 制御系에 使用되는 位相調節器의 等分 位相調整方式

김종달,朴鍾演 울산과학대학 1979 연구논문집 Vol.4 No.-

自動 速度 制御係에 쓰이는 位相 調節器의 정확도를 높이기 위하여 트리거 펄스의 발생위치의 정확도 및 위상각의 정말도가 요구된다. 이러한 요구에 적합한 回路를 연산 증폭기 및 C-MOS I.C를 이용하여 설계한 뒤에 이론치와 실험치를 비교 검토한 결과 근사적 일치를 얻었다. The phase shifter which is used in automatic speed control system demands the exactness of the triggering position and firing angle in order to improve its accuracy. By the use of the operational amplifiters and C-MOS I.C suited for such requirements, this paper compares the theoretical value with the measurement value.

Characterization and theoretical analysis of isoporous cycloaliphatic polyurethane membrane for water treatment

Choi, Young-Kwon,Park, Seung-Min,Lee, Sangho,Khang, Dahl-Young,Choi, Dong-Chan,Lee, Chung-Hak Taylor Francis 2014 Desalination and Water Treatment Vol. No.

토모테라피에서 MVCT 영상을 이용한 환자 테이블의 처짐 정도의 분석

박하령,김용호,박달,김원택,기용간,김동현,배진숙,Park, Ha Ryung,Kim, Yong Ho,Park, Dahl,Kim, Wontaek,Ki, Yongkan,Kim, Donghyun,Bae, Jin Suk 한국의학물리학회 2015 의학물리 Vol.26 No.2

토모테라피(Tomotherapy)는 치료 시 환자의 무게에 의한 환자 테이블의 처짐(sag)이 발생한다. 본 연구에서는 이 테이블의 처짐 정도를 토모테라피의 MVCT 영상 처리를 통해 객관적으로 분석하는 방법을 제시하였다. 이 방법을 사용하여 22명의 두경부 환자와 한명의 두개척수조사(CSI) 환자에 대하여 테이블 처짐을 측정하였다. 두경부 환자의 경우 0.4~1.54 mm의 환자 테이블 처짐과 평균 $0.7^{\circ}$의 처짐 각도를 보였다. 치료범위가 길수록 처짐의 정도는 커졌고 처짐 각도는 큰 상관이 없었다. 두개척수조사(CSI) 환자의 경우 4.97 mm의 환자 테이블 처짐을 보였다. 이 방법을 사용하면 객관적이고 간편한 방법으로 환자 테이블 처짐을 측정할 수 있고 이런 측정을 통하여 테이블 처짐에 의한 오차를 고려한 치료범위 설정에 도움이 될 것이다. In Tomotherapy the couch sags during the treatment due to the weight of the patient. In this study, we developed a simple method to obtain the amount of the sag and the pitch angle of the couch using the image processing technique of MVCT images in Tomotherapy. Using the method we evaluated the sag and pitch of couch for 22 head and neck patients and one craniospinal irradiation (CSI) patient. The sag and the average pitch angle of couch were 0.40~1.54 mm and $0.7^{\circ}$ for head and neck patients, respectively. For head and neck patients, the sag increased as the longitudinal length of the irradiation volume increased and the pitch angle showed no relationship with the longitudinal length. For the CSI patient the sag was 4.97 mm. Using the method the amount of the couch sag could be measured easily and the measured data could be useful in determination of margins considering the table sag error.

Adjuvant external beam radiation and brachytherapy for vaginal resection margin positive cervical cancer

Kim, Donghyun,Ki, Yongkan,Kim, Wontaek,Park, Dahl,Lee, Joohye,Lee, Jayoung,Jeon, Hosang,Nam, Jiho The Korean Society for Radiation Oncology 2018 Radiation Oncology Journal Vol.36 No.2

Purpose: To evaluate the treatment outcomes of adjuvant external beam radiation therapy (EBRT) and vaginal brachytherapy (VB) following radical hysterectomy in cervical cancer patients with involved vaginal resection margin (VRM). Materials and Methods: We retrospectively reviewed the medical records of 21 patients treated with postoperative EBRT and VB for positive VRM FIGO stage IB-IIA cervical cancer between 2003 and 2015. Concurrent platinum-based chemotherapy was administered to all patients. Results: The median whole pelvis EBRT dose was 50.4 Gy (range, 45 to 50.4 Gy). In the VB, the median dose per fraction, number of fractions, and total dose delivered were: 4 Gy (range, 3.0 to 4.0 Gy), 4 fractions (range, 3 to 5 fractions), and 16 Gy (range, 12 to 20 Gy), respectively. At a median follow-up of 46 months (range, 9 to 122 months), local recurrence was observed in 2 patients, and distant metastasis was present in 7 patients. All patients with local recurrence subsequently developed distant metastases. The 5-year local control, disease-free survival, and overall survival rates were 89.1%, 65.9%, and 62.9%, respectively. Of the 21 patients, 7 patients (33.3%) reported grade 2 acute toxicity; however, there were no grade 3 or higher acute adverse events. Grade 1-2 late toxicities were observed in 8 patients. Late grade 3 urinary toxicity was reported in 1 patient. Conclusions: Adjuvant EBRT and VB showed excellent local control and low toxicity in cervical cancer patients with positive VRM. Although limited by its retrospective nature, the findings from our study provide evidence supporting the use of additional VB in pathologically involved VRM.

Prognostic value of the maximum standardized uptake value for the locoregional control in early glottic cancer

김동현,기용간,주지현,Jeon Hosang,Park Dahl,남지호,김원택 대한방사선종양학회 2021 Radiation Oncology Journal Vol.39 No.4

Purpose: To evaluate the prognostic value of the pretreatment maximum standardized uptake value (SUVmax) for locoregional control (LRC) of early glottic cancer treated with primary radiotherapy.Materials and Methods: We retrospectively reviewed the medical records of 101 patients with T1-T2N0 glottic cancer treated with helical tomotherapy between 2013 and 2016. The clinical T-stages were T1 in 87 (86.1%) and T2 in 14 (13.9%) patients. The median total dose was 63 Gy (63–67.5 Gy) in 2.25 Gy per fraction. The survival outcomes were plotted using Kaplan-Meier curves. Receiver operating characteristic curves were used to assess the optimal SUVmax cut-off value for predicting locoregional recurrence.Results: The median follow-up period was 58 months (range, 11 to 90 months). The 5-year overall survival (OS) and locoregional recurrence-free survival rates were 96.8% and 85.4%, respectively. The median pretreatment SUVmax of the primary tumor for all 101 patients was 2.3 (range, 1.1 to 9.1). The best cut-off value for SUVmax for predicting LRC was 3.3, with a sensitivity of 78.6% and specificity of 73.6%. Univariate analysis showed that T-stage, overall treatment time (≥43 days), and high SUVmax (≥3.3) were significant predictors of LRC. Multivariate analysis showed that LRC was independently affected by a high SUVmax (≥3.3) (hazard ratio = 5.505, p = 0.020).Conclusion: High pretreatment SUVmax (≥3.3) is a negative prognostic factor for LRC in early glottic cancer patients treated with primary radiotherapy.

Directional Terahertz Radiation from GalnP Lateral Superlattice.

Yim, Jong-Hyuk,Song, Kyoung-Jin,Park, Kwang-Wook,Kang, Seok-Jin,Lee, Yong-Tak,Jho, Young-Dahl American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.7

<P>We devised directionally controllable THz emission sources based on lateral composition modulation (LCM) structures. LCM structures were composed of In-rich Ga0.47In0.53P and Ga-rich Ga0.51In0.49P layers whose period was in quantum scale of ~`5 nm. The inherent type II band alignment in these structures leads to electron-hole (e-h) separation and plays a key role in generating later- ally polarized dipole ensembles, thus concomitantly emitting enhanced transmissive THz waves as compared to bulk sample. On the other hand, in lateral geometry, changes in THz fields between LCM and bulk structures turned out to negligible since the vertical electronic diffusion was allowed in both samples.</P>