사진 데이터로 본 미세먼지 단계 추정 시스템 : 딥러닝 기술의 적용

박현지 ( Hyeon-ji Park ),정지영 ( Ji-young Jeong ),김유정 ( Yu-jung Kim ),박현수 ( Hyun-soo Park ),최현지 ( Hyun-ji Choi ) 한국정보처리학회 2023 한국정보처리학회 학술대회논문집 Vol.30 No.2

미세먼지 단계를 예측하는 딥러닝 기반 시스템을 개발하고 그 성능을 평가하는 연구를 진행했다. 연구에서 320개의 풍경 사진 데이터를 수집하고, 해당 시점의 미세먼지 농도를 측정하여 “좋음” 또는 “나쁨”으로 분류했다. 데이터 전처리 단계에서는 특히 하늘 이미지의 특성을 고려하여 다양한 전처리 기법을 적용하였다. 다섯 가지 이미지 데이터 모델을 사용하여 이미지를 분류하고 미세먼지 단계를 예측하는 모델을 개발하였으며, 또 이 모델들을 다양한 기법으로 앙상블 해보며 성능을 비교했다. 그 결과, Random Forest를 이용한 앙상블 모델이 제일 뛰어난 예측 성능을 보였다. 이러한 연구 결과는 미세먼지 모니터링 및 예측에 유용한 시스템 개발의 가능성을 제시한다.

0-1 혼합정수계획법을 이용한 LCD 패널 절단 문제 최적화

김기동,박현지,심윤섭,전태보,Kim, Kidong,Park, Hyeon Ji,Shim, Yun-Seop,Jeon, Tae Bo 한국센서학회 2017 센서학회지 Vol.26 No.4

LCD(Liquid Crystal Display) panel cutting problem is a sort of two dimensional cutting stock problem. A cutting stock problem is problem that it minimizes the loss of the stock when a stock is cut into various parts. In the most research of the two dimensional cutting stock problem, it is supposed that the relative angle of a stock and parts is not important. Usually the angle is regarded as horizontal or perpendicular. In the manufacturing of polarizing film of LCD, the relative angle should be maintained at some specific angle because of the physical and/or chemical characteristics of raw material. We propose a mathematical model for solving this problem, a two-dimensional non-Guillotine cutting stock problem that is restricted by an arranged angle. Some example problems are solved by the C++ program using ILOG CPLEX classes. We could get the verification and validation of the suggested model based on the solutions.

한식을 기반으로 한 수출전략형 할랄 레토르트 편의식의 해외 소비자 요구도 및 기호도 조사

김지나,이근종,박현지,이현민,신원선,Kim, Ji-Na,Lee, Kun Jong,Park, Hyun-Ji,Lee, Hyeon Min,Shin, Weon-Sun 한국식품조리과학회 2018 한국식품조리과학회지 Vol.34 No.3

Purpose: The objective of this study was to develop export strategic home meal replacement (HMR) recipes for Halal retort food certification by analysis of manufacturing practices for certified Halal retort food processes. Methods: Selected retort foods in Halal meeting were prepared in laboratories. The frequency of consumer preference was examined. For this, an export strategic menu was surveyed and analyzed using a questionnaire. Based on the results of the first survey in Korea, a second survey was conducted for the sensory evaluation of Halal retort foods in Kuala Lumpur, Malaysia. The results of the second survey were analyzed by the response methods. In order to achieve the objective of this study, a consumer panel was formed and operated. We investigated developing Halal retort foods based on appearance, fragrance, saltiness, sweetness, texture, harmony of ingredients, off-flavor, and overall acceptability of Kimchi-pilaff (KP), Bulgogi-pilaf (BP), and Dolsot-pilaf (DP), which are commonly used in Korean style foods. Results: In the Malaysia survey results (9 scoring test), they preferred KP (7.1score) compared to BP (6.43 score) and DP (6.39 score) (p<0.001). In each category, KP showed high score compared to BP and DP samples.; appearance (KP 6.64 score, BP 6.45, DP 6.04 score), fragrance (KP 7.10 score, BP 6.20, DP 6.16 score), saltiness (KP 7.20, BP 6.35 score, DP 5.97 score), sweetness (KP 6.77, BP 6.28 score, DP 6.0score), harmony (KP 7.13 score, BP 6.47 score, DP 6.39 score), and off taste (KP 3.40, BP 3.69, DP 6.9 score). The study results show an export strategic developing menu as follows: First, export strategic menu development was conducted for BP and KP. ${\chi}^2$-test of general factor (gender, age, religion) was conducted. There was no difference. Conclusion: KP was a major retort food and has similar potential power or can be developed as an export strategic Halal food. Furthermore, we were developed foods through many expert meetings. So, we need to develop more HMR recipes.

연구논문 : 인공 피부, 인공 각막 모델을 활용한 동물실험 대체법 연구의 최근 동향

이내경 ( Nae Kyung Lee ),박현지 ( Hyeon Ji Park ),임경민 ( Kyung Min Lim ) 한국동물실험대체법학회 2014 동물실험대체법학회지 Vol.8 No.1

Cosmetics and drug products must be safe and effective to human and for ensuring their safety and efficacy, animal tests have been widely employed that ensued the sacrifice of numerous experimental animals. However, animal tests impose considerable pains and discomforts to laboratory animals and the results obtained cannot always predict the responses of human accurately. To resolve these ethical issues accompanying animal tests and to obtain more human-relevant test results, reconstructed human tissue models are being actively investigated and employed to animal alternative test methods. Especially, reconstructed human skin and cornea models have advanced into practical application steps in the development of cosmetics. Human reconstructed skin and cornea models provide high degrees of similarity to real human tissues and accordingly, they are expected to be able to produce more human relevant results. Their application to safety and efficacy tests of cosmetics have been continuously expanding. Here we review the current trends in the research of human reconstructed skin and cornea models.

인공 피부, 인공 각막 모델을 활용한 동물실험 대체법 연구의 최근 동향

이내경 ( Nae Kyung Lee ),박현지 ( Hyeon Ji Park ),임경민 ( Kyung Min Lim ) 한국동물실험대체법학회 2014 동물실험대체법학회지 Vol.8 No.1

Cosmetics and drug products must be safe and effective to human and for ensuring their safety and efficacy, animal tests have been widely employed that ensued the sacrifice of numerous experimental animals. However, animal tests impose considerable pains and discomforts to laboratory animals and the results obtained cannot always predict the responses of human accurately. To resolve these ethical issues accompanying animal tests and to obtain more human-relevant test results, reconstructed human tissue models are being actively investigated and employed to animal alternative test methods. Especially, reconstructed human skin and cornea models have advanced into practical application steps in the development of cosmetics. Human reconstructed skin and cornea models provide high degrees of similarity to real human tissues and accordingly, they are expected to be able to produce more human relevant results. Their application to safety and efficacy tests of cosmetics have been continuously expanding. Here we review the current trends in the research of human reconstructed skin and cornea models.

다문화 청소년의 이중언어능력이 자아존중감에 미치는 영향: 부모 지지의 매개효과를 중심으로

박정윤 ( Jeong Yun Park ),박현지 ( Hyeon Ji Park ) 성결대학교 다문화평화연구소 2021 다문화와 평화 Vol.15 No.2

본 연구의 목적은 한국 다문화청소년패널조사(Multicultural Adolescents Panel Study: MAPS) 데이터를 활용하여 다문화 청소년의 이중언어능력이 자아존중감에 미치는 영향에 대한 부모 지지의 매개효과를 검증하는 것이다. 연구대상은 다문화청소년패널조사(Multicultural Adolescents Panel Study: MAPS) 6차년도 자료 중 외국 출신 부모를 둔 중학교 3학년 다문화 청소년의 데이터를 활용하였다. 분석 결과는 다음과 같다. 첫째, 부모와 의사소통 시 외국 출신 부모 나라 언어보다는 한국어를 사용하는 다문화 청소년이 많은 것으로 나타났으며, 대부분 보통 수준의 외국 출신 부모 나라 언어를 구사하고 있었다. 다문화 청소년들은 대부분 자아존중감과 부모 지지를 높게 지각하고 있는 경향성을 보였다. 둘째, 다문화 청소년의 자아존중감에 영향을 미치는 변인들을 살펴본 결과, 가구 월평균 소득과 외국 출신 부모 나라 언어능력 수준이 높을수록, 부모 지지를 높게 지각할수록 자아존중감이 높은 것으로 나타났다. 이 중 부모 지지가 다문화 청소년의 자아존중감에 가장 높은 영향력을 미치는 것으로 나타났다. 셋째, 부모 지지는 외국 출신 부모 나라 언어능력과 자아존중감의 관계에서 완전 매개효과를 보이는 것으로 나타났다. 본 논문은 이러한 연구 결과를 바탕으로 다문화 청소년의 자아존중감 향상을 돕기 위한 가족 관계적 측면의 접근을 제시하였고, 연구 의의 및 후속 연구를 위한 제안을 하였다. The purpose of this study is to examine the mediation effect of parental support on the influences of bilingual abilities of multicultural adolescents on self-esteem using the data from the sixth wave of Korean Multicultural Adolescents Panel Study(MAPS). Multicultural adolescents of the collected data are in the 3rd grade of middle school in Korea living with their foreign parent. The analysis results are as follows: First, the results showed that there are more multicultural adolescents who use Korean rather than the first language of their foreign parent when communicating with their foreign parent, and most of them could speak a moderate level of their foreign parent’s first language. The perception of self-esteem and parental support were highly recognized in most of the multicultural adolescents. Second, as for the variables that affect the self-esteem of multicultural adolescents, the higher monthly income of a household is and the better they can speak their foreign parent’s first language, the higher the self-esteem is. Third, parental support showed a full mediating effect in the relationship between ability of the first language of their foreign parent and self-esteem. Based on these results and implications, the study suggests the family-relational approach to help multicultural adolescents improve their self-esteem, and some further studies.

근대 중 Flufenoxuron, Thiacloprid, Pyridalyl의 생산단계 농약 잔류허용기준설정 연구

박상정 ( Sang-jeong Park ),황규원 ( Kyu-won Hwang ),가승준 ( Seung-jun Ka ),김세현 ( Se-hyeon Kim ),김용덕 ( Yong-deok Kim ),박현지 ( Hyun-ji Park ),최수언 ( Su-eon Choi ),문준관 ( Joon-kwan Moon ) 한국환경농학회 2022 한국환경농학회 학술대회집 Vol.2022 No.-

본 연구는 근대 중 살충제 3종(Flufenoxuron, Thiacloprid, Pyridalyl)은 PHI와 MRL은 설정되어 있으나 생산단계 잔류허용기준(Pre-Harvest Residue Limit, PHRL)은 설정되어있지 않다. 따라서 최종 약제 살포일로부터 농약의 잔류량 감소 양상을 통해 약제별 잔류특성을 파악하고, 반감기를 산출하는 것으로 부적합 농산물의 유통을 사전에 차단하기 위한 PHRL 설정을 위해 기초 자료로 활용하고자 수행하였다. 시험 포장은 위도상 직선거리가 20 km 이상인 2 곳(시험포장1 : 경기도 안성, 시험포장2 : 경기도 이천)을 선정하여 시설재배 조건에서 농약 안전사용기준에 따라 살포하였다. 시료 채취는 최종살포 후 0(3시간 후), 1, 2, 3, 5, 7, 10일차까지 수확하였고, Pyridalyl이 살포된 처리구는 안전사용기준 시기를 포함하여 14일차까지 수확하였다. 위와 같이 수확한 시료들을 분석하여 잔류량의 경시적인 변화를 파악해 이를 토대로 생물학적 반감기를 산출하였다. 근대 중 잔류하는 농약 성분들은 추출, 액-액 분배, 정제 과정을 거친 후 HPLC로 분석하였다. 약제별 분석법상 정량 한계(MLOQ)는 0.05 mg/kg로 정량한계 수준, 정량한계의 10배 수준, 잔류허용기준 수준에서 회수율 시험을 진행하였다. 세 가지 수준에 대해 Flufenoxuron은 각각 94.2∼96.6%, 94.9∼97.0%, 94.7∼101.4%, Thiacloprid는 73.6∼85.6%, 90.6∼92.2%, 95.1∼97.4% 그리고 Pyridalyl은 105.1∼121.2%, 97.3∼100.8%, 91.0∼93.4%이었다. 각 시험 포장에서의 근대 중 약제별 생물학적 반감기는 Flufenoxuron은 2.8일(포장1)과 3.3일(포장2), Thiacloprid는 1.5일, 3.3일 그리고 Pyridalyl은 1.7일, 3.3일로 나타났다.

농도에 따른 빛의 삼원색의 반사도 차이 검출 연구

이태희(Tae-Hee Lee),김지선(Ji-Sun Kim),정구인(Gu-In Jung),최주현(Ju-Hyeon Choi),김아희(A-Hee Kim),박현지(Hyun-Ji Park),오한별(Han-Byeol Oh),전재훈(Jae-Hoon Jun) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.7

메타버스 플랫폼의 CSCL 도구 기능 분석과 요구 분석을 통한 협력 학습 도구 기능 적용 방안 탐색

최순리(Soon-Ri Choi),송지훈(Ji-Hoon Song),박현지(Hyeon-Ji Park),주홍주(Hong-Joo Ju),박민지 (Min-Ji Park) 부산대학교 교육발전연구소 2023 교육혁신연구 Vol.33 No.2

Purpose: Metaverse platforms are used in many ways to provide new learning experiences in digital environment. Our study aims to identify ways to utilize commercially-developed metaverse platforms in computer-supported collaborative learning, and to explore their possibility of use as a learning tool by identifying functions that needs to be improved significantly around users. Method: In order to utilize metaverse platforms as supporting tools, this study analyzed the functions of three metaverse platforms(Gather.town, ifland, and ZEPETO) based on Kirschner and Erkens' 3x3x3 framework. In addition, a survey of the performance and need was conducted among 143 college students, and and the survey data were analyzed with independent-sample t-test, Borich analysis, and the Locus for Focus model to identify user-centered functions of metaverse. Results: As a result, Gather.town meets most of 3 x 3 x 3 framework criteria, and social/metasocial, individual, interactive and representational measures appeared to be top priorities to be developed at user-level. Conclusion: In conclusion, although metaverse platforms appeared to be appropriate for supporting cognitive learning at team and community level, to enhance collaboration, it was necessary to develop a function to mutually control the team’s performance in real time.

삼각측량 원리 기반 광학센서를 이용한 굽힘각 측정 방법

오한별(Han-Byeol Oh),정구인(Gu-In Jung),김지선(Ji-Sun Kim),이태희(Tae-Hee Lee),최주현(Ju-Hyeon Choi),박성준(Sung-Jun Park),박현지(Hyun-Ji Park),김아희(Ah-Hee Kim),전재훈(Jae-Hoon Jun) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.7