압전나노소재 기반의 플렉서블 에너지 하베스팅 소자 연구동향

박귀일,Park, Kwi-Il 한국분말야금학회 2018 한국분말재료학회지 (KPMI) Vol.25 No.3

Recent developments in the field of energy harvesting technology that convert ambient energy resources into electricity enable the use of self-powered energy systems in wearable and portable electronic devices without the need for additional external power sources. In particular, piezoelectric-effect-based flexible energy harvesters have drawn much attention because they can guarantee power generation from ubiquitous mechanical and vibrational movements. In response to demand for sustainable, permanent, and remote use of real-life personal electronics, many research groups have investigated flexible piezoelectric energy harvesters (f-PEHs) that employ nanoscaled piezoelectric materials such as nanowires, nanoparticles, nanofibers, and nanotubes. In those attempts, they have proven the feasibility of energy harvesting from tiny periodic mechanical deformations and energy utilization of f-PEH in commercial electronic devices. This review paper provides a brief overview of f-PEH devices based on piezoelectric nanomaterials and summarizes the development history, output performance, and applications.

High Performance Flexible Inorganic Electronic Systems

박귀일,이건재 한국진공학회 2012 한국진공학회 학술발표회초록집 Vol.2012 No.8

특집 -수출포장에 대해

박귀서 (사)한국포장협회 2002 包裝界 Vol.116 No.-

플로우 경험이 모바일 쇼핑 행동에 미치는 영향 기술수용모델의 확장

박귀리(Gui Ree Park),박재진(Jae Jin Park) 한국광고홍보학회 2014 한국광고홍보학보 Vol.16 No.2

이 연구의 주 목적은 소비자 행동에 많은 영향을 미치는 요인들 가운데 하나인 플로우(flow) 이론을 도입하여 확장된 TAM 모형을 제시하고, 이들 변수들 간의 관계를 알아보는 데 있다. 모바일 쇼핑을 경험한 실질적인 소비자들을 대상으로 서베이를 실시하였으며, 신념 변수들과 태도 및 의도 간의 관계는 구조방정식 모형을 통해 분석되었다. 연구결과, 기존 인터넷 쇼핑과 모바일 쇼핑 연구결과들과 일관되게 유용성, 사용용이성 그리고 플로우는 모바일 쇼핑 태도와 의도에 직간접적으로 유의미한 영향을 미치는 것으로 나타났다. 플로우는 모바일 쇼핑에 대한 태도에 가장 큰 영향력을 미치는 변인이며, 의도에도 직접적으로 영향력을 미치는 것으로 나타났다. 모바일 쇼핑 행동과 관련한 이론적 및 실무적 함의가 논의되었다. The purpose of this study was to expand the technology acceptance model by adding flow theory to the model. A survey with 269 respondents was conducted, and the SEM(structural equation model) analyses were used to test hypotheses. Findings revealed that perceived usefulness, ease of use, and flow had positively significant direct/indirect effects on attitude toward mobile shopping and intention to shop through mobile. It should be noticed that flow was most significant predictor of attitude toward mobile shopping and directly affects to the intention. Theoretical and practical impressions were discussed.

생의 찬미 ( 讚美 )

박귀 불교사(불교) 1932 불교사 불교 Vol.107 No.-

다양한 종류의 예측에서 머신러닝 성능 비교

박귀만(Gwi-Man Park),배영철(Young-Chul Bae) 한국전자통신학회 2019 한국전자통신학회 논문지 Vol.14 No.1

현재 인공지능의 한 영역인 머신러닝을 적용하여 다양한 예측을 수행하고 있으나 실제 현장에서 어떤 종류의 알고리즘을 사용하는 것이 가장 좋은 방법인지는 늘 문제가 된다. 본 논문은 여러 머신러닝 지도 학습 알고리즘을 이용하여 월별 전력 거래량, 전력 거래금액, 월별 생산 확산 지수, 최종 에너지 소비, 자동차용 경유를 예측하여 각 경우에 어떤 알고리즘이 가장 적합한 알고리즘인지를 알아본다. 이를 위해 통계청에 나와 있는 월별 전력 거래량과 월별 전력 거래금액, 월별 생산 확산 지수, 최종에너지 소비, 자동차용 경유로 머신 러닝이 예측하는 값의 확률을 보여주고 각각의 예측값을 평균화 하여 이들 중에서 어떤 기법이 가장 우수한 기법인지를 확인한다. Now a day, we can perform various predictions by applying machine learning, which is a field of artificial intelligence; however, the finding of best algorithm in the field is always the problem. This paper predicts monthly power trading amount, monthly power trading amount of money, monthly index of production extension, final consumption of energy, and diesel for automotive using machine learning supervised algorithms. Then, we find most fit algorithm among them for each case. To do this we show the probability of predicting the value for monthly power trading amount and monthly power trading amount of money, monthly index of production extension, final consumption of energy, and diesel for automotive. Then, we try to average each predicting values. Finally, we confirm which algorithm is the most superior algorithm among them.

가족교육이 정신분열병환자 가족의 불안과 스트레스 감소에 미치는 영향

박귀서,이영호,심경순 한국 정신보건 사회사업학회 1998 정신보건과 사회사업 Vol.5 No.-

This study assumes that if the schizophrenia patient's families have the family education which offers the information about the correct knowledge in schizophrenia and the reduce method of anxiety and stress, this schizophrenic families will do well with more stable primary caregiver's role. Accordingly, the purpose of this study was to investigate the effectiveness of the structured program of family education in helping the stable emotion state of families in the process of schizophrenic's rehabilitation. The program deals with the general features such as the causes, processes, symptoms and treatments, prognosis of schizophrenia, the effects and side effects of chemotherapy, the importance of the rehabilitation, specific copying methodes of schizphranic's behavioral traits, copying stratigies of families anxiety and stress and the usable resources. The results are as follows : 1. Families' negative recognition changes toward schizophrenia and patient who have a schizophrenia, The hypothesis "The family's negative recognition toward schizophrenia and patient who has a schizophrenia would be changed after the participation in the education program" was supported by the following results. The results of pretest and posttest of family education between participated family group and non participated family group are as follows. In the education group, scores of Recognition Changes Questionnaire at the post-test were significantly higher than those at the pre-test. 2.Schizophrenia Families' anxiety level changes The hypothesis "The schizphrenia family's anxiety level would be reduced after the participation in the education program" was supported by the following results. The results of pretest and posttest of family education between participated family group and non-participated family group are as follows: In the education group, scores of anxiety level change scale. at the post test were significantly lower than those the pretest. However the score of anxiety level in comparison group was statistically higher rather than pretest. Hence this hypothesis "The schizophrenia family's anxiety level would be reduced after the participation in the education program" was supported. 3. Schizphrenia Families' stress level changes The hypothesis "The schizophrenia family's stress level would be reduced after the participation in the education program" was supported by the following results. The results of pretest and posttest of family education between participated family group and non-participated family group are as follows. In the education group, scores of stress level changes scale. at the post-test were signicantly lower than those the pre test. In conclusion, the family education program was effcetive in changes negative recognition of families toward schizophrenia and patient who has schizophrenia, reducing of anxiety and stress related to the patients. Together with this conclusion, the researcher presented a suggestion for the necessity of the futher study on not only consider each clinical settings and individule characteristic and needs of families' member but also the development and application of family education program which is more specific and comprehensive and continuing in its contents and format.

딥러닝을 이용한 하천 유량 예측 알고리즘

박귀만(Gwi-Man Bak),오세랑(Se-Rang Oh),박근호(Geun-Ho Park),배영철(Young-Chul Bae) 한국전자통신학회 2021 한국전자통신학회 논문지 Vol.16 No.6

본 논문은 학문적인 이해를 기반을 둔 예측을 수행하기 위해 FDNN(: Flood drought index neural network) 알고리즘을 제시한다. 데이터에 의존한 예측이 아닌 학문적인 이해를 기반을 둔 예측을 딥러닝에 적용하기 위해, 알고리즘을 수리, 수문학을 기반으로 구성하였다. 강수량의 입력으로 하천의 유량을 예측하는 모델을 구성하여 K-교차검증을 통해 모델의 성능을 측정한다. 제시한 알고리즘의 성능을 증명하기 위해 시계열 예측에서 가장 많이 사용되는 LSTM(: Long short term memory) 알고리즘의 예측 성능과 비교하여 제시한 알고리즘의 우수성을 나타낸다. In this paper, we present FDNN algorithm to perform prediction based on academic understanding. In order to apply prediction based on academic understanding rather than data-dependent prediction to deep learning, we constructed algorithm based on mathematical and hydrology. We construct a model that predicts flow rate of a river as an input of precipitation, and measure the model s performance through K-fold cross validation.

漢、韓語介詞短語作狀語時之語序比較

박귀란 한국중어중문학회 2016 한국중어중문학회 학술대회 자료집 Vol.2016 No.11

台灣華語文能力測驗(TOCFL)與中國大陸漢語水平考試(新HSK)歷史與等級沿革之比較考察

朴貴蘭(Pu, Kuei-lan) 한국중국어교육학회 2018 중국어교육과연구 Vol.0 No.28