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SHAP 기반 UWB NLOS 판별 정확도 개선 알고리즘
조가연(Ga-Yeon Cho),박지웅(Ji-Woong Park),고영배(Young-Bae Ko) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2
본 논문은 설명 가능한 인공지능 기술 중 하나인 SHAP 을 이용하여 기존 머신 러닝 기반의 UWB NLOS 기법들의 정확도를 개선하기 위한 알고리즘을 제안한다. SHAP 분석을 통해서 CIR 입력 데이터를 분석하여 Positive Feature 와 Negative Feature 를 추출하고, Threshold 보다 높은 Negative 영향을 나타내는 데이터를 정제하여 신경망의 분류정확도를 개선하였다. 실험 결과, 제안 기법은 기존의 신경망 기반 기법보다 분류 정확도 성능이 약 10% 개선되었다.
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간호대생의 부모-자녀 간 의사소통 유형이 대학생활적응력 및 현장실습적응력에 미치는 영향
김현주(Kim, Hyun-Joo),정아라(Jeong, A-Ra),정인영(Jeong, In-Young),정재용(Jeong, Jae-Yong),조가연(Jo, Ga-Yeon),조병준(Cho, Byeong-Jun),조영주(Cho, Young-Ju),주민경(Joo, Min-Gyeong) 한국보건기초의학회 2018 한국보건기초의학회지 Vol.11 No.1
The purpose of this study was to examine the effects that different types of parent-child communication has on a nursing student’s adaption to college life and to field practice. A survey was conducted on fourth year undergraduate students from a university nursing department in Chungcheong-do, South Korea. All 139 students surveyed had more than one year clinical practice experience. The data analysis was done in IBM SPSS statistics 24.0 using descriptive statistics, the Simple regression analysis, one-way ANOVA, 2 sample t-test and the Sheffe test. The simple regression analysis showed that if negative, closed, and problematic communication exists in the parent-child relationship, it will negatively affect the student’s adaptability to college life and to fieldwork. On the other hand, it was found that the more positive the communication was between the parent-child, the more positive the student’s attitude would be. This positive attitude was beneficial to the student’s adaptability to university life and to fieldwork. This study found that there was an effect on the adaptability to university life and to field practice from the type of communication a nursing student has with their parents. Subsequent research is needed to develop and apply qualitative programs that use these findings to help nursing students in their studies and to verify their effectiveness.
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갈조류 고리매(Scytosiphon lomentaria)의 형태 변이와 분포
조가연,김소연,부성민 忠南大學校 環境問題硏究所 2001 環境硏究 Vol.19 No.-
We investigated morphological variation of a brown alga Scytosiphon Iomentaria using specimens deposited in the established herbaria in Korea. S. Iomentaria has a heteromorphic life cycle, erect gametophytes occurring from winter to late spring and crust sporophytes occurring from summer to early winter. Erect thallie, making a patch from a discoid crust on rock or other macroalgae, were twisted, 5 - 50㎝ in length, 1 - 10㎜ in diameter, and dark brown. Cortex comprised small cells in 2 - 3 layers and produced plurilocular sporangia, ascocysts, and phaeophycean hairs. Plurilocular sporangia formed isogamtes, which were conjungated with each other for zygote. Ascocysts were unknown in function and remained on cortical cells after plurilocular sporangia released. Phaeophcyean hairs occurred on the surface of thalli. S. Iomentaria showed a clear seasonality of length and width in Oeyeondo on the west coast of Korea, the peak being in spring, but the local variation was obscure. Morphology of thalli from Korea was similar to that from Japan, Kamchatka, north America, New Zealand, Australia, France and England. Cosmopolitan distribution of S. Iomentaria may be well understood using sequence analyses of nuclear, plastid, and/or mitochondrial DNAs.
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