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Flow learning 기반 기능성 게임 설계 방법론
서경원(Kyungwon Seo),이장선(Jangsun Lee),류호경(Hokyoung Ryu) 한국HCI학회 2012 한국HCI학회 학술대회 Vol.2012 No.1
기능성 게임의 학습효과에 기반한 다양한 교육용 프로그램이 개발되고 있다. 이들 프로그램은 학습효과 달성에 초점을 모은 나머지 흥미라는 게임 본연의 가치는 상대적으로 소홀히 하고 있다. 본 논문에서는 기존 기능성 게임의 교육적 방향성에 부합하면서 게임의 몰입을 유지할 수 있도록 도와주는 네 가지 요소를 제안하고, 그 실효성에 대해 실험을 진행하였다. 이 연구의 결과를 통하여 학습효과를 유지하면서 몰입을 도와주는 게임 요소들을 실험적으로 검증하였고, 이를 통하여 기능성 게임의 새로운 설계 방법론을 제안한다. A recent development of e-learning systems design has been made on gaming effects that enhance natural engagement with learning activities arising from the gaming experience. In so doing, at issue is how the learning objectives should be counterbalanced with the gaming effects that might move away people from the learning outcomes expected. The present study proposed a four-legged learning experience design framework that embraces these two goals (i.e., achieving learning objectives as well as better learning experience via playing games). An empirical study was carried out to validate this framework and how this framework would help HCI practitioners was also discussed.
서경원(Kyungwon Seo),최영일(Youngil Choi),최재영(Jaeyoung Choi),윤기영(Kiyoung Yoon) 대한외과학회 2009 Annals of Surgical Treatment and Research(ASRT) Vol.76 No.1
Purpose: Recently, laparoscopic appendectomy (LA) has been widely performed in developed countries. In addition, minimally invasive surgery such as LA is a challenge to surgical residents. The aim of this study is to evaluate learning curve of residents in comparison to that of experienced surgeons. Methods: Fifty cases of LA that were performed by experienced surgeons (group A) and forty-seven cases of LA that were performed by 8 residents (group B) were reviewed retrospectively. Results: Operative time was longer in group B (50.8±12 vs. 82.8±40 min. P<0.001). Hospital days of group B was shorter (4.8±2.4 vs. 3.7±2.1 days P=0.021). No other parameters were statistically significant. In group A, wound infection developed in 1 case. In group B, wound infection developed in 4 cases, intraabdominal abscess in 1, subcutaneous emphysema in 1. Conclusion: Inexperienced surgeons can perform laparoscopic appendectomy easily in the early days of individual laparoscopic training course.
전착법을 이용한 CuInSe<sub>2</sub> 박막태양전지 광활성층의 조성 조절
박영일,김동환,서경원,정증현,김홍곤,Park, Young-Il,Kim, Donghwan,Seo, Kyungwon,Jeong, Jeung-Hyun,Kim, Honggon 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.3
Thin light-active layers of the $CuInSe_2$ solar cell were prepared on Mo-coated sodalime glass substrates by one-step electrodeposition and post-annealing. The structure, morphology, and composition of $CuInSe_2$ film could be controlled by deposition parameters, such as the composition of metallic precursors, the concentration of complexing agents, and the temperature of post-annealing with elemental selenium. A dense and uniform Cu-poor $CuInSe_2$ film was successfully obtained in a range of parametric variation of electrodeposition with a constant voltage of -0.5 V vs. a Ag/AgCl reference electrode. The post-annealing of the film at high temperature above $500^{\circ}C$ induced crystallization of $CuInSe_2$ with well-developed grains. The KCN-treatment of the annealed $CuInSe_2$ films further induced Cu-poor $CuInSe_2$ films without secondary phases, such as $Cu_2Se$. The structure, morphology, and composition of $CuInSe_2$ films were compared with respect to the conditions of electrodeposition and post-annealing using SEM, XRD, Raman, AES and EDS analysis. And the conditions for preparing device-quality $CuInSe_2$ films by electrodeposition were proposed.
최영일(Youngil Choi),서경원(Kyungwon Seo),윤기영(Kiyoung Yoon),이상호(Sangho Lee),최경현(Kyunghyun Choi) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.75 No.4
Purpose: Despite the reduced incidence and mortality of gastric cancer, this illness still remains the second leading cause of cancer death in Korea. Various adjuvant chemotherapies have been proposed for patients with advanced gastric cancer. Randomized trials comparing chemotherapies with best supportive care have consistently shown that cytotoxic treatment is of some benefit. Nevertheless, there has been no major improvement in the overall prognosis of advanced gastric cancer. Methods: We have examined the chemotherapy sensitivity of advanced gastric cancer specimens by using an ex vivo ATP based chemosensitivity assay (ATP-TCA). A variety of chemotherapeutic agents were tested. The one hundred and forty specimens we tested were from resection specimens. Results: The histological tumor classification, lymphatic invasion, neural invasion and venous invasion affected the chemosensitivity of some drugs. 5-FU was a more potent drug than cisplatin, doxorubicin, iriontecan and methotrexate. The chemosensitivity of differentiated cancer was different compared to that of undifferentiated cancer. Doxorubicin and iriontecan were more effective in poorly differentiated, signet ring cell and diffuse type cancers. The manner of tumor invasion affected the chemosensitivity to some drugs. Conclusison: Further study is necessary to assess the effectiveness of some chemotherapy drugs on advanced gastric cancer, including their effect on tumor recurrence and patient survival.
위성기반 산불피해지수를 이용한 북한지역 산불피해지 분석
김서연,윤유정,정예민,권춘근,서경원,이양원,Kim, Seoyeon,Youn, Youjeong,Jeong, Yemin,Kwon, Chunguen,Seo, Kyungwon,Lee, Yangwon 대한원격탐사학회 2022 大韓遠隔探査學會誌 Vol.38 No.6
Recent climate change can increase the frequency and damage of wildfires worldwide. It can also lead to the deterioration of the forest ecosystem and increase casualties and economic loss. Satellite-based indices for forest damage can facilitate an objective and rapid examination of burned areas and help analyze inaccessible places like North Korea. In this letter, we conducted a detection of burned areas in North Korea using the traditional Normalized Burn Ratio (NBR), the Normalized Difference Vegetation Index (NDVI) to represent vegetation vitality, and the Fire Burn Index (FBI) and Forest Withering Index (FWI) that were recently developed. Also, we suggested a strategy for the satellite-based detection of burned areas in the Korean Peninsula as a result of comparing the four indices. Future work requires the examination of small-size wildfires and the applicability of deep learning technologies.
산불위험지수 지역최적화를 통한 2022년 북한산불 사례분석
윤유정,김서연,최소연,박강현,강종구,김근아,권춘근,서경원,이양원,Youn, Youjeong,Kim, Seoyeon,Choi, Soyeon,Park, Ganghyun,Kang, Jonggu,Kim, Geunah,Kwon, Chunguen,Seo, Kyungwon,Lee, Yangwon 대한원격탐사학회 2022 大韓遠隔探査學會誌 Vol.38 No.6
Wildfires in North Korea can have a directly or indirectly affect South Korea if they go south to the Demilitarized Zone. Therefore, this study calculates the regional optimized Forest Fire Danger Index (FFDI) based on Local Data Assessment and Prediction System (LDAPS) weather data to obtain forest fire risk in North Korea, and applied it to the cases in Goseong-gun and Cheorwon-gun, North Korea in April 2022. As a result, the suitability was confirmed as the FFDI at the time of ignition corresponded to the risk class Extreme and Severe sections, respectively. In addition, a qualitative comparison of the risk map and the soil moisture map before and after the wildfire, the correlation was grasped. A new forest fire risk index that combines drought factors such as soil moisture, Standardized Precipitation Index (SPI), and Normalized Difference Water Index (NDWI) will be needed in the future.
허홍수(Hongsoo Hur),박희용(Heeyong Park),김정석(Jungsuk Kim),서경원(Kyungwon Seo),이무훈(Moohun Lee),조성훈(Sunghoon Cho),최의인(Euiin Choi) 한국정보기술학회 2007 Proceedings of KIIT Conference Vol.2007 No.-
??유비쿼터스 환경에서 상황인식은 사용자의 상황이나 의도를 파악하여 개인에게 적합한 서비스를 제공하는 개인화된 서비스를 제공하는데 연구가 이루어지고 있다. 상황인식 시스템에서 사용자가 원하는 서비스를 제공하기 위해서는 하위레벨 컨텍스트 데이터를 상위레벨 컨텍스트 정보로 변환하여야 한다. 이를 위하여 재사용과 확장성을 가진 온톨로지 기반 컨텍스트 모델에 대한 연구들이 시도되고 있다. 하지만 대부분 특정 상황만을 위한 상황 모델링 연구가 수행되고 있다. 본 논문에서는 다양한 도메인에서 사용할 수 있는 컨텍스트 모델을 제안한다. Context aware in ubiquitous environment is attaining to support the personalized service that allow individual to relevant service. In context aware system, to support services that user wants is necessary to convert high-level contextual information from low-level context data Therefore, researches for ontology based context model with reuse and extensibility have been trying. But, most researches have been trying to model for specific situation. In this paper, we present context model to use in various domains.
유비쿼터스 환경에서 여행정보 서비스를 위한 상황정보 필터링 기법
박희용(Heeyong Park),허홍수(Hongsoo Hur),김정석(Jungsuk Kim),서경원(Kyungwon Seo),이무훈(Moohun Lee),조성훈(Sunhoon Cho),최의인(Euiin Choi) 한국멀티미디어학회 2007 한국멀티미디어학회 학술발표논문집 Vol.2007 No.1
최근 유ㆍ무선 인터넷 환경의 급성장과 유비쿼터스(Ubiquitous)라는 용어가 동장하면서 새로운 컴퓨팅 환경을 이용하여 개인화된 서비스를 제공하기 위해 많은 연구가 진행되고 있다. 현재 여행정보 제공서비스는 관광안내소와 문헌정보 제공과 인터넷을 사용한 웹 서비스 등의 방법으로 제공되고 있으나, 유비쿼터스 환경에서는 상황정보를 이용하여 사용자에게 개인화된 여행정보를 제공해 줄 수 있다. 이 때, 여행자들은 자신의 선호도와 현재 상황에 적절한 여행정보를 제공받길 원하게 되며, 여행자의 주변 상황 및 개인 선호도에 따라 다양하게 변화할 수 있는 여행정보를 정확히 제공하기 위해서는 개인의 성향을 파악하고 다양한 상황정보 중 유용한 상황정보만을 추출하는 기법이 요구된다. 본 논문에서는 유비쿼터스 환경에서 사용자의 상황정보를 기반으로 여행정보 서비스를 제공하고자 할 때 사용자에게 적절한 정보를 제공하기 위하여, 다양한 상황정보들 사이에서 유용한 정보를 추출할 수 있는 상황정보 필터링 기법을 제안한다.