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김재윤(Jae Yoon Kim),이보름(Bo Reum Lee),장제관(Je Kwan Jang),조하나(Ha Na Cho),이지선(Ji Sun Lee),김미경(Mi Kyung Kim),이명구(Myung Koo Lee),임성실(Sung Cil Lim) 대한약학회 2009 약학회지 Vol.53 No.6
Aging society and aged society are determined by the component ratio of the elderly to the whole population; aging society is defined as a society whose ratio of the elderly population is less than 7%, and it is called aged society when the ratio is over 14%. Korea's aging process is so fast and unprecedented over the world according to many statistical data and investigations. The purpose of this study was to provide guidance and basic data to educate the elderly for the proper use of medication and health functional food. This study was carried out on 80 subjects of age 65 or older in Cheong Jusi in Choogncheongbuk-do. They answered questionnaire that was prepared for this study. The data were collected from August 4, 2008 to August 18, 2008. The collected data were analyzed by using the SPSS 12.0OK (for window) program and Microsoft EXCEL. The following is a summary of the results of this study. First, in the aspect of purchasing, the majority of respondents bought OTC drugs and health functional food for health and illness prevention. Purchasing places of drugs were diverse. Second, in the aspect of taking drugs, the older answerers were, the higher the number of drugs being taken was. Third, in the aspect of proper storage of drugs, most respondents have no specific spaces. Finally, regarding recognition of drug abuse and disposal, most people have little awareness or have no idea.
윤아름,김수은,김성보,Yoon, A Reum,Kim, Su Eun,Kim, Sung Bo 한국강구조학회 2017 韓國鋼構造學會 論文集 Vol.29 No.1
GFRP와 강관으로 구성된 합성형 보강링 대하여 설계를 진행하고 휨거동을 분석하여 실험 결과 및 유한요소해석 프로그램인 ABAQUS를 통한 결과와 비교하였다. GFRP 합성단면에 대한 유효폭을 ABAQUS beam모델과 이론값을 이용하여 검증하였으며, 또한 항복정도에 따라 변화하는 GFRP 보강링의 이론적인 변형률 값을 이용하여 항복하중, 균열하중, 극한하중을 구하여 실험결과와 비교하고 ABAQUS solid 모델을 이용하여 중립축의 변화를 확인하였다. The flexural behavior of composite ring stiffened by GFRP and steel pipe is presented in this paper. The effective width is required to construct FEM beam element model to verify the composite flexural behavior of stiffened ring of cylindrical shell structure. The experimental results are compared with the theoretical and FEM results by commercial program ABAQUS to verify the effective width coefficient. The yield, crack and ultimate loads is calculated using theoretical strains that varies depending on yield state and compared with experiment result and FEM results by ABAQUS solid model.
Tomotherapy MVCT와 Linac CBCT의 Imaging dose 비교평가
윤보름,홍미란,안종호,송기원,Yoon, Bo Reum,Hong, Mi Lan,Ahn, Jong Ho,Song, Ki Won 대한방사선치료학회 2014 대한방사선치료학회지 Vol.26 No.1
목 적 : 토모테라피(Tomotherapy)와 선형가속기(Linac)를 이용한 세기조절방사선치료(IMRT) 시 환자의 정확한 위치잡이를 위해 매일 시행되는 MVCT와 CBCT의 imaging dose를 비교 평가해보고자 한다. 대상 및 방법 : 인체 모형 팬텀(Anderson rando Phantom, USA)을 Head, Thorax, pelvis의 3부위로 분류하여 촬영 부위의 중심에 $0.5{\times}0.5cm2$. 크기로 자른 GafChromic EBT3 film을 팬텀의 표면의 상, 하, 좌, 우와 팬텀의 표면에서 2cm깊이의 상, 하, 좌, 우, 중심에 위치시킨 뒤 토모테라피(Hi Art)와 Novalis Tx의 OBI를 이용하여 surface dose와 inner dose를 각각 3회씩 반복 측정한다. 측정 된 film은 RIP version6.0을 이용하여 값을 산출한 뒤 일원분산분석법을 이용하여 선량의 평균값을 산출한다. 결 과 : 인체모형팬텀을 이용하여 MVCT와 CBCT를 시행한 결과 MVCT inner dose의 측정값은 head에서 $15.43cGy{\pm}6.05$, thorax에서 $16.62cGy{\pm}3.08$, pelvis에서 $16.81cGy{\pm}5.24$로 나타났으며, CBCT inner dose는 head에서 $13.28{\pm}3.68$, thorax에서 $13.66{\pm}4.04$, pelvis에서 $15.52{\pm}3.52$의 값을 나타냈다. Surface dose의 측정 값은 MVCT 시행 시 head에서 $11.64{\pm}4.05$, thorax에서 $12.16{\pm}4.38$, pelvis에서 $12.05{\pm}2.71$로 나타났으며, CBCT의 경우 head에서 $14.59{\pm}3.51$, thorax에서 $15.82{\pm}2.89$, pelvis에서 $17.48{\pm}2.80$을 나타내었다. 결 론 : Inner dose의 경우 kV energy를 사용하는 CBCT보다 MV energy를 사용하는 MVCT에서 head에서 1.16배, thorax에서 1.22배, pelvis에 서 1.08배 높게 나타났으며, Surface dose의 경우 MVCT보다는 CBCT의 head에서 1.25배, thorax에서 1.30배, pelvis에서 1.45배 높게 측정되었다. Imaging dose는 치료 선량에 비해 작은 양이지만 daily로 시행되는 만큼 정상조직에 일정부분 영향을 미칠 것으로 생각된다. 하지만 IMRT치료를 위해서는 영상유도를 통한 IGRT가 반드시 병행되어 치료계획과 실제치료간 오차를 최소화하여야 한다. 따라서 환자가 받는 imaging dose를 최소화하기 위해서는 치료계획 시 Imaging dose를 고려하여 치료계획을 수립하거나 MVCT 촬영 시 Scan 범위를 최소화하여 시행해야 될 것으로 사료된다. Purpose : In case of the intensity modulated radiation therapy (IMRT) using Tomotherapy and linear accelerator (Linac), it was to compare and to evaluate the imaging dose of MVCT and CBCT that were performed daily for the correct set up of the patient. Materials and Methods : The human body model Phantom (Anderson rando Phantom, USA) was divided into the three parts as Head, Thorax, pelvis, and after GafChromic EBT3 film cut to the size of $0.5{\times}0.5cm2$.in the center of the recording area were situated on the ant, post, left, and right surface of the phantom and 2cm in depth from the ant, post, left, right, and center surface of the phantom, the surface dose and inner dose were measured repeatedly three times, respectively, using the tomotherapy (Hi Art) and the OBI of NovalisTx. The measured film calculated the output value by RIP version6.0 and then the average value of the dose was calculated by the one-way analysis of variance. Results : Using the human body model phantom, the results of MVCT and CBCT performance were that measurements of MVCT inner dose were showed $15.43cGy{\pm}6.05$ in the head, $16.62cGy{\pm}3.08$ in the thorax, $16.81cGy{\pm}5.24$ in the pelvis, and measurements of CBCT inner dose were showed $13.28{\pm}3.68$ in the head, from $13.66{\pm}4.04$ in the thorax, $15.52{\pm}3.52$ in the pelvis. The measurements of surface dose were showed in case of MVCT performance, $11.64{\pm}4.05$ in the head, $12.16{\pm}4.38$ in the thorax, $12.05{\pm}2.71$ in the pelvis, and in case of CBCT performance, $14.59{\pm}3.51$ in the head, $15.82{\pm}2.89$ in the thorax, $17.48{\pm}2.80$ in the pelvis, respectively. Conclusion : In case of Inner dose, the MVCT using MV energy showed higher than the CBCT using kV energy at 1.16 times in the head, at 1.22 times in the thorax, at 1.08 times in the pelvis, and in case of surface dose, the CBCT was higher than MVCT, at 1.25 times in the head, at 1.30 times in the thorax, at 1.45 times in the pelvis. Imaging dose was a small amount compared to the therapeutic dose but it was thought to affect partially to normal tissue because it was done in daily schedule. However, IMRT treatment was necessarily parallel with the IGRT treatment through the image-guide to minimize errors between planned and actual treatment. Thus, to minimize imaging dose that the patients receive, when planning the treatment, it should be set up a treatment plan considering imaging dose, or it must be performed by minimizing the scan range when shooting MVCT.
김진우(Jinwoo Kim),윤지은(Jieun Yoon),이인성(Inseong Lee),이기호(Kiho Lee),최보름(Bo Reum Choi) 한국경영과학회 2008 經營 科學 Vol.25 No.3
A wide variety of convergent digital products are emerging through the combination of multiple independent digital technologies. Digital convergence provides new revenue sources for businesses and new ways of satisfying individual needs of consumers. Despite its business and consumer implications, little research has addressed how people perceive or evaluate convergent products. This study aims at understanding how consumers interpret and evaluate convergent digital products by conducting two consecutive studies. Firstly, a survey was conducted to understand how people interpret convergent products in three ways suggested by the conceptual combination theory based in cognitive science. Secondly, an experiment was conducted to investigate the impact of combination strategies and product similarities on user evaluation of convergent products. Study results indicate that similarity of constituent products has a substantial effect on the interpretation of concept combination strategies. Moreover, combination strategy and product similarity were found to have substantial effects on user comprehension, perceived newness, and preferences for convergent products. This paper ends with an examination of the implications and limitations of the study results.