러시아의 캄차카 원정대에 대한 고찰

강성희 ( Kang¸ Seonghee ) 연세대학교 유럽사회문화연구소 2020 유럽사회문화 Vol.0 No.25

This paper examines the historical background and overall exploration process of the 1st Kamchatka Expedition (1725-1730) and the 2nd Kamchatka Expedition (1733-1742) and aims to highlight the meaning of the expedition. The task of the first expedition was to determine whether Asia and America were connected or separated. The leader of the expedition was V. Bering. A. Chirikov and M. Spangberg were appointed as his assistants. They spent first two years on traveling from Saint Petersburg to Okhotsk. They moved from Okhotsk to Nizhnekamchatsk and sailed north and then north-east along the shore, exploring Kresta Bay, Gulf of Anadyr, and St. Lawrence Island. They passed the Bering Strait between Asia and the Americas, but the thick fog prevented them from seeing America with their own eyes. This led Bering to propose the second expedition to Kamchatka. The 2nd expedition had been a long-term project that took 10 years. Again, V. Bering was the leader of the expedition and A. Chirikov and M. Spanberg assisted him. Representative achievements of the expedition include the discovery of Alaska, Aleutian Islands, Commander Islands and Bering Islands, as well as detailed mapping of the northern and northeastern coasts of Russia and the Kuril Islands. In addition, the academic portion of the expedition, which conducted ethnographic, historical and scientific studies of the Siberia and Kamchatka regions are noteworthy. Their achievements provide an academic foundation for future researchers.

Feasibility Study of a New fetal Shielding Device for Pregnant Brain Tumor Patients

Seonghee Kang,Kyeong-Hyeon Kim,Chang Heon Choi,Jong Min Park,Jung-In Kim 대한방사선방어학회 2021 대한방사선방어학회 학술발표회 논문요약집 Vol.2021 No.11

Development of 3D printed patient-specific compensator for total body irradiation based on CT images

Kang Sang Won,Song Changhoon,Kim In Ah,Kim Jae-Sung,Eeom Keun-Yong,Chung Jin Beom,Lee Boram,Kang Seonghee,Cho Woong 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.83 No.3

This study aims to develop a 3D printed compensator for total body irradiation (TBI) based on CT images and validate the feasibility of the proposed method using a RANDO anthropomorphic phantom. The workfow for the proposed method is as follows. First, CT images were acquired and segmented into diferent body regions to obtain surface information from the phantom. Second, the defcit thickness in each body region was calculated by comparing it to the maximum thickness of the body. Third, the efective attenuation coefcients of compensator materials, such as polylactic acid (PLA) and Cerrobend, were measured to fabricate a TBI compensator capable of shielding the dose for each defciency thickness. Finally, the optimized compensator mold was converted to a standard triangle language fle and manufactured using 3D printing. Dose assessment of the proposed method with the fabricated compensator was performed using a metal–oxide–semiconductor feld-efect transistor (MOSFET) and EBT3 flm. The average efective attenuation coefcients were 0.027, 0.393, 0.013, and 0.025 for solid water, Cerrobend, and PLA with 20% and 50% infll, respectively. While the midline-dose diferences in the conventional TBI were signifcant, ranging from−12.38 to 6.10% at the measured locations, those in the proposed method were less than 3%, except for the maximum value of 3.78% at the neck. In the dose profle measured by flm, the overall mean absolute percentage diference of the conventional TBI was higher than that of the proposed method. In conclusion, the proposed method showed a more accurate and uniform dose than the conventional TBI. Furthermore, the proposed method could reduce the time required for treatment preparation by simplifying a portion of the overall treatment preparation process required by the conventional TBI.

Clinical implementation of PerFRACTION™ for pre-treatment patient-specific quality assurance

Kang Sang-Won,Lee Boram,Song Changhoon,Eeom Keun-Yong,장범섭,Kim In Ah,Kim Jae Sung,Chung Jin Beom,Kang Seonghee,Cho Woong,Shin Dong-Suk,Kim Jin-Young,전민수 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.80 No.6

This study is to assess the clinical use of commercial PerFRACTION™ for patient-specific quality assurance of volumetricmodulated arc therapy. Forty-six pretreatment verification plans for patients treated using a TrueBeam STx linear accelerator for lesions in various treatment sites such as brain, head and neck (H&N), prostate, and lung were included in this study. All pretreatment verification plans were generated using the Eclipse treatment planning system (TPS). Dose distributions obtained from electronic portal imaging device (EPID), ArcCHECK™, and two-dimensional (2D)/three-dimensional (3D) PerFRACTION™ were then compared with the dose distribution calculated from the Eclipse TPS. In addition, the correlation between the plan complexity (the modulation complexity score and the leaf travel modulation complexity score) and the gamma passing rates (GPRs) of each quality assurance (QA) system was evaluated by calculating Spearman’s rank correlation coefficient (rs) with the corresponding p-values. The gamma passing rates of 46 patients analyzed with the 2D/3D PerFRACTION™ using the 2%/2 mm and 3%/3 mm criteria showed almost similar trends to those analyzed with the Portal dose imaging prediction (PDIP) and ArcCHECK™ except for those analyzed with ArcCHECK™ using the 2%/2 mm criterion. Most of weak or moderate correlations between GPRs and plan complexity were observed for all QA systems. The trend of mean rs between GPRs using PDIP and 2D/3D PerFRACTION™ for both criteria and plan complexity indices as in the GPRs analysis was significantly similar for brain, prostate, and lung cases with lower complexity compared to H&N case. Furthermore, the trend of mean rs for 2D/3D PerFRACTION™ for H&N case with high complexity was similar to that of ArcCHECK™ and slightly lower correlation was observed than that of PDIP. This work showed that the performance of 2D/3D PerFRACTION™ for pretreatment patient-specific QA was almost comparable to that of PDIP, although there was small difference from ArcCHECK™ for some cases. Thus, we found that the PerFRACTION™ is a suitable QA system for pretreatment patient-specific QA in a variety of treatment sites.

분류와 속성 정보를 이용한 상품 검색 시각화 기법

강성희(Seonghee Kang),심준호(Junho Shim) 한국전자거래학회 2006 한국전자거래학회지 Vol.11 No.3

정보의 시각화는 정보의 직관적 이해를 위해 중요한 역할을 하며, 다양한 응용영역에서 해당 환경의 특징에 맞추어 활용되고 있다. 본 논문에서는 전자상거래에서 상품을 효과적으로 검색하여 보여주기 위해서는 기존의 방식이 아닌 상품 정보의 특색에 맞는 검색 방식과 시각화 기법이 필요하다고 판단하여, 기존의 MapNet이나 클러스터맵등의 기술을 반영한 상품 검색 비주얼라이제이션 기법을 소개한다. 상품 카테고리 검색과 속성 검색의 분리를 통해 검색조건에 명확한 시맨틱 부여를 가능하게 하고, 사용자에게 검색 결과를 평가하고 재검색을 수행할 수 있게 한다. 결과 평가는 원하는 결과를 얻지 못했을 경우 사용자가 질의어를 재작성하여 최적의 결과를 찾을 수 있게 한다. Information visualization plays an important role to provide a conceptual comprehension of the information and should be adjusted and featured to reflect the characteristics of the domain to which it is applied. Product searching in e-Commerce is not an exception. In this paper, we present visualization techniques that are specified for effectively browsing the results of product searching. We considered visualization techniques including MapNet and Cluster Map and modified them to reflect the characteristics of the product domain. We consider two types of search queries: category searching and product property searching, and make it possible to include more detailed product semantics in their search criteria. We also provide a query refinement mechanism so that even users with rack of understanding the products may rewrite their queries for better results.

색온도 조절과 단계별 디밍이 가능한 2-Ch 조명 제어에 관한 연구

박성희(Seonghee Park),강현철(Hyun-Chul Kang),최종우(Jong-Woo Choi),강현주(Hyun-Joo Kang),성정식(Jung-Sik Sung),강태규(Tae-Gyu Kang) 한국조명·전기설비학회 2015 한국조명·전기설비학회 학술대회논문집 Vol.2015 No.5

캄차카 반도의 지명 ‘캄차카’의 유래에 대한 고찰

강성희(Kang, Seonghee) 순천향대학교 인문학연구소 2021 순천향 인문과학논총 Vol.40 No.1

본 논문은 러시아 극동에서 제일 큰 반도인 캄차카의 지명이 어디에서 유래했는가에 대해 살펴보고 있다. 많은 지명학자들이나 역사학자들, 캄차카 전문가들이 이 주제에 관심을 가지고 가설을 제기하여, 현재까지 20여 개 이상의 가설이 존재한다. 논문은 이 가설들을 유형화하여 분류해보고, 어떤 가설이 가장 진실에 부합할 가능성을 가지고 있는지를 알아볼 것을 목적으로 하고 있다. 이를 위해 먼저, 캄차카라는 이름이 언제 어디에서 처음 등장했는지를 살펴보았다. 현재까지 밝혀진 바에 의하면, 1660년대 고두노프 지도, 레메조프 시베리아 전도, 빗선 지도에 캄차카강의 이름이 처음 쓰인 것으로 보인다. 또한 이 지도들의 제작 순서, 사본 제작 관계 등을 고려해보면, 캄차카라는 이름은 처음에 강에만 한정해 쓰이다 점차 반도 전체를 일컫는 말로 확대되었고, 나아가 민족명 캄차달에 이른 것으로 보인다. 이 두 기준에 의하면, 캄차달이라는 민족명에서 지명이 유래했다는 주장이나, 구릉 지대와 화산이 많은 캄차카의 지형적 특징에서 지명이 유래했다고 보는 가설들은 옳지 않다. 또한 1700년대의 기록이나 사건에서 캄차카 지명의 유래를 찾는 가설 역시 기준에 위배된다. 그에 비해 캄차카강 근처에 살던 영웅의 이름이나 비단직물 캄카에서 강의 이름이 유래했다는 가설의 경우, 위의 두 가지 기준에 적합하고 역사적 사실에 모순되지 않는다. 역사 속에서 더 많은 자료가 밝혀진다면 두 가설이 더욱 구체화된 모습을 가질 수 있을 것이다. This paper examines the origin of the name of Kamchatka , the largest peninsula in the Russian Far East. Currently, there are more than 20 hypotheses raised by geographers, historians, and Kamchatka experts interested in this subject. The purpose of this paper is to categorize these hypotheses and find out which hypothesis is the closest to the truth. First of all, we looked at when and where the name of Kamchatka was first used. According to historical data, it appears that the name of the Kamchatka River was first used on the Godunov map, Remezov s atlases, and Witsen`s Map of Tartary. Considering the order and interrelationships of these maps, the Kamchatka was initially used only for rivers, then gradually expanded to refer to the entire peninsula, and later it seems to have reached the name of an ethnic group ‘Kamchadals’. It turns out that the following two hypotheses do not contradict historical facts. 1. The name of the Kamchatka River was generated from the name of the hero who lived around the river ‘Kamchatka’. 2. The name of the Kamchatka River comes from the word Kamka , which means silk fabric.

대리적 상호작용 교수 전략이 온라인 토론 참여와 만족도에 미치는 효과

강성희 ( Seonghee Kang ),이영주 ( Youngju Lee ) 한국교육정보미디어학회(구 한국교육정보방송학회) 2018 교육정보미디어연구 Vol.24 No.3

본 연구는 온라인 토론 학습에서 타인의 상호작용을 관찰하는 대리적 상호작용이 온라인 토론의 양적, 질적 참여도와 만족도에 미치는 영향을 탐구하였다. 온라인 토론 환경의 특성을 고려하여 텍스트와 비디오 방식의 대리적 상호작용을 구분하여 설계 시사점을 도출, 적용하였다. 연구 참여자는 초등학생 79명이었고, 텍스트 방식의 대리적 상호작용, 비디오 방식의 대리적 상호작용 및 통제 집단 세 집단으로 무선 할당하였다. 토론 참여도 측정은 토론 글을 토론 글 작성 횟수와 유의미한 참여 점수를 평가하였고, 토론 만족도의 측정은 실험 종료 후 설문 조사를 실시하였다. 토론 참여와 만족도에 대한 집단 간 차이는 일원배치 분산분석을 통해 비교하였다. 연구 결과, 첫째, 토론 양적 참여도인 토론 글 작성 횟수에는 집단별로 차이가 없었지만 토론의 질적 참여도에서 텍스트 매체 대리적 상호작용을 제공한 집단이 통제 집단뿐만 아니라 비디오 매체의 대리적 상호작용을 제공한 집단보다도 높은 점수를 나타냈다. 둘째, 텍스트 매체의 대리적 상호작용과 비디오 매체의 대리적 상호작용을 제공하여 토론 만족도를 측정한 결과, 집단 간 차이가 나타나지 않았다. 그러나 만족도의 세부 영역 중 대리적 상호작용에 관한 문항에서는 비디오 매체 대리적 상호작용 집단이 통제 집단보다 높은 만족도를 보였다. 본 연구 결과는 학생들의 유의미한 토론 참여와 만족도를 높이고자하는 교수자에게 유용한 지침을 제공할 것이다. The purpose of this study is to investigate the effects of vicarious interaction instructional strategies that facilitate cognitive processes by observing the interactions of others on elementary school students’ quantitative and qualitative participations and satisfaction of online discussions. In this paper, we proposed and applied instructional design strategies for vicarious interactions in consideration of the characteristics of text and video media and online discussion environments. The participants were 79 elementary school students and randomly assigned into the three groups: text type vicarious interaction group, video type vicarious interaction group, and controlled group. We measured the student participants by counting the frequency of writing and scoring the meaningful writings. To measure students’ satisfaction, we administered a survey after the experiment finished. We used ANOVA to analyze the group differences in students’ participations and satisfactions in their online discussions. As a result, first, we found that there was no group difference in the number of writings but the groups were different in the meaningful participation scores. The text type vicarious interaction group outperformed the other two groups in the meaningful participations. Second, there was no group difference in the overall satisfactions of online discussions but video type vicarious interaction group showed higher level of satisfaction in the subsection for satisfaction about vicarious learning. To conclude, this study suggests useful instructional strategies to help teachers improve students’ meaningful participations and satisfactions of their online discussions.

LED조명의 색온도 제어를 위한 제어 시스템 구조

박성희(Seonghee Park),강현철(Hyun-Chul Kang),최종우(Jong-Woo Choi),강현주(Hyun-Joo Kang),성정식(Jung-Sik Sung),강태규(Tae-Gyu Kang) 한국조명·전기설비학회 2014 한국조명·전기설비학회 학술대회논문집 Vol.2014 No.11

산화철 나노입자의 U373MG 세포 독성평가 및 방사선 세포생존 곡선에 미치는 영향에 대한 연구

강성희(Seonghee Kang),김정환(Jeonghwan Kim),김도경(Dokyung Kim),강보선(Bosun Kang) 한국방사선학회 2012 한국방사선학회 논문지 Vol.6 No.6

본 연구는 초상자성 산화철 나노입자 (SPIONs)의 세포독성평가 및 SPIONs를 uptake한 뇌신경교종 (glioblastoma multiforme, GBM) 세포의 방사선 세포생존곡선을 구하기 위해 수행되었으며, 본 연구의 결과는 양성자선과 SPIONs 이용한 GBM의 양성자선 치료선량 정보 등 양성자선 치료효과를 개선하기 위한 기초자료로 활용될 수 있을 것이다. SPIONs의 세포독성을 평가는 in vitro 실험 후 MTT 분석법을 이용하여 수행하였다. 독성평가 결과 1~100㎍/ml의 농도에서는 세포생존율의 유의한 차이가 나타나지 않았다. 하지만 200㎍/ml의 농도에서는 세포생존율이 74.2%로 감소 하며 세포독성을 나타냈다. SPIONs가 uptake 된 U373MG세포와 uptake 되지 않은 U373MG세포에 0~5 Gy의 양성자선을 조사하여 각각에 대한 세포생존곡선을 측정한 결과를 분석하여 SPIONs가 uptake된 U373MG세포의 세포생존율이 더 급격히 감소함을 알 수 있었다. 결론적으로 SPIONs가 uptake 된 세포에서는 보다 적은 선량으로도 세포사멸을 유도할 수 있음을 알 수 있었다. 따라서 GBM에 SPIONs를 타겟팅하면 양성자선을 이용한 뇌신경교종 치료효과를 개선할 수 있음을 보였다. This research was performed to evaluate the superparamagnetic iron oxide nanoparticles’(SPIONs) cell toxicity and to measure the radiation cell survival curve changes of SPIONs-uptake glioblastoma multiforme cells. The results could be practically used as the fundamental data to ameliorate proton beam cancer therapy, for example, providing necessary GBM treatment dose in the proton beam therapy when the therapy takes advantage of SPIONs. The assessment of the toxicological evaluation of synthesized SPIONs was accomplished by MTT assay as an in vitro experiment. The results showed no meaningful differences in the cell survival rate at the 1-100㎍/ml SPIONs concentrations, but the cell toxicity was shown as the cell survival rate decreased up to 74.2% at the 200㎍/ml SPIONs concentration. Then, we measured each radiation cell survival curve for U373MG cells and SPIONs-uptake U373MG cells with 0~5 Gy of proton beam irradiations. It is learned from the analysis of the experimental results that the SPION-uptake cells’ radiation survival rate was more rapidly decreased as the irradiation dose increased. In conclusion we confirmed that SPIONs-uptake in U373MG cells induces cell death at the much less dose than the lethal dose of SPION-non-uptake cell. This research shows that the therapeutic efficacy of glioblastoma multiforme treatment in proton beam therapy can be improved by SPIONs targeting to the GBM cells.