우리나라기업의 물류환경변화에 따른 제3자물류에 관한 연구

박현희,Park, Hyun-Hee 한국정보기술전략혁신학회 2002 情報學硏究 Vol.5 No.3

오늘날 기업들은 소비자의 욕구를 만족할 수 있는 제품을 생산제조하여 이를 효과적으로 공급할 수 있는 능력을 중요시 여기고 있으며 이는 기업의 경쟁력을 의미하기도 한다. 이러한 시간과 장소에 따른 물리적 제품의 이동활동을 물류활동이라고 한다. 기업의 물류활동을 아웃소싱 의 일종인 제3자 물류산업으로 전환하여 기업의 물류비 절감과 물류서비스의 극대화를 추구하기 위한 노력이 계속적으로 진행되어야 하는 것이다.

옥수수 유식물 신초에서 Brassinosteroids의 항상성 조절을 위반 C-26 탈메틸 반응의 중요성

박현희,김영수,김성기,Park, Hyun-Hee,Kim, Young-Soo,Kim, Seong-Ki 한국식물생명공학회 2006 식물생명공학회지 Vol.33 No.1

옥수수 유식물 줄기에서 중요 BRs의 함량조절 기작을 옥수수 유식물 줄기로부터 얻어진 효소원을 이용하여 조사하였다. 먼저 활성형 BR인 CS의 대사를 [$^2H_0$]-와[$^2H_6$]-CS를 기질로 사용하여 실험한 결과 [$^2H_0$]- 와 [$^2H_6$]-CS는 각각 [$^2H_0$]-26-norCS와 [$^2H_3$]-28-norCS로 전환됨을 GC-MS 분석을 통해 확인하였으며, 이러한 두 가지의 대사과정 중 C-26 탈메틸 반응에 의한 CS에서 26-norCS로의 전환만이 생체 내에서 일어나는 반응임을 확인하였다. 이와 함께 주요 생합성 전구물질인 6-deoxoTE와 6-deoxoTY에 대해서도 같은 효소원을 이용하여 C-26 탈메틸 반응에 의한 대사를 조사한 결과 6-deoxoTE는 6-deoxo-3-dehydroTE와 6-deoxoTY로, 6-deoxoTY는 6-deoxo-3-dehydroTE와 6-deoxoTE로 전환됨을 확인함과 동시에, 6-deoxoTE는 6-deoxo-26-norTE 로, 6-deoxo-3-DHT는 3-dehydro-6-deoxo-26-norTE, 6-deoxoTY는 6-deoxo-26-norTY로 전환됨을 확인하였다. 이러한 결과들은 옥수수 유식물 줄기에서 중요 BRs가 모두 C-26 탈메틸 반응이 일어날 수 있음을 나타내는 결과로서 BRs의 C-26 탈메틸 반응이 활성형 BR뿐만 아니라 그 생합성 전구물질에도 중요한 함량조절 기작임을 확인 할 수 있었다. Regulatory mechanism for endogenous levels of castasterone (CS) and its biosynthetic precursors in shoots of maize was investigated by the use of enzyme solution prepared from the plant tissue. When [$^2H_0$]- and [$^2H_6$]-CS was used as substrates, [$^2H_0$]-26-norCS and [$^2H_3$]-28-norCS were identified as products, indicating that [$^2H_0$]- and [$^2H_6$]-CS are differently metabolized into [$^2H_0$]-26-norCS and [$^2H_3$]-28-norCS by C-26 and C-28 demethylation, respectively. This suggests that both C-26 and C-28 demethylation can be involved in CS catabolism. In fact that C-28 demethylation only occurred when isotope labeled substrate was used, however, C-26 demethylation is thought be a natural reaction occurred in the maize shoots. When 6-deoxoteasterone (6-deoxoTE) was used, 6-deoxo-26-norTE and 3-dehydro-6-deoxo-26-norTE as well as 6-deoxo-3-dehydroTE and 6-deoxotyphasterol (6-deoxoTY) were identified as enzyme products. When 6-deoxoTY was added, 6-deoxo-26-norTY as well as 6-deoxo-3-dehydroTE and 6-deoxoTE was identified as products. These indicate that C-26 demethylation of 6-deoxoTE, 6-deoxo-3-dehydroTE and 6-deoxoTY as well as a reversible C-3 epimerization from 6-deoxoTE to 6-deoxoTY intermediated by 6-deoxo-3-dehydroTE are operative in the maize shoots, demonstrating that endogenous levels of biosynthetic precursors of CS are also controlled by C-26 demethylation. Therefore, it is thought that C-26 demethylation is an important and a common deactivation process which functions to maintain steady state levels of endogenous brassinosteroids in the maize shoots.

블록 기반 실시간 계수 시스템

박현희,이형구,김재희,Park Hyun-Hee,Lee Hyung-Gu,Kim Jai-Hie 대한전자공학회 2006 電子工學會論文誌-SP (Signal processing) Vol.43 No.5

본 논문에서는 블록 기반 실시간 계수 시스템을 제안한다. 계수 시스템은 쇼핑몰이나 대형건물의 출입구, 엘리베이터, 에스컬레이터 등과 같은 다양한 환경에 적용될 수 있다. 본 논문의 핵심은 세 부분으로 구분 할 수 있다. 첫째, 환경 변화에 강인한 배경 제거 기법, 둘째, 학습을 이용한 블록 기반 계수 결정 방법, 마지막으로 4 채널에서 실시간으로 처리가 가능한 시스템 구현이다. 환경 변화에 강인한 배경 제거 기법으로 MOG(mixture of gaussian) 방법을 적용하였으며, 블록 기반 계수 결정 방법은 영상을 $6{\times}12$개의 영역으로 구분하고, 학습 영상을 이용하여 각각의 블록에서 물체의 크기에 대한 평균과 분산을 계산하고 이를 저장하여 계수에 적용하는 방법을 제안하였으며, 마지막으로 4 채널에서 실시간으로 처리 하기 위하여 추출된 물체 각각을 구분하여 추적하는 것이 아니라 물체가 이동 중에 발생할 수 있는 여러 상황 즉 결합이나 분리되는 현상을 분석하여 계수 판단에 적용하였다. 제안된 방법을 이용하여 에스컬레이터, 복도 그리고 출입문등과 같이 조명환경과 그림자 상황 등이 변하는 환경에서 의 계수 정확도는 $90{\sim}94%$, 채널 당 처리 속도는 15 frames/sec 이상의 성능을 보였다. In this paper, we propose a block-based real-time people counting system that can be used in various environments including showing mall entrances, elevators and escalators. The main contributions of this paper are robust background subtraction, the block-based decision method and real-time processing. For robust background subtraction obtained from a number of image sequences, we used a mixture of K Gaussian. The block-based decision method was used to determine the size of the given objects (moving people) in each block. We divided the images into $6{\times}12$ blocks and trained the mean and variance values of the specific objects in each block. This was done in order to provide real-time processing for up to 4 channels. Finally, we analyzed various actions that can occur with moving people in real world environments.

패션제품 버리기 어려움에 영향을 미치는 소비자 특성

박현희,구양숙,Park, Hyun-Hee,Ku, Yang-Suk 한국의류산업학회 2017 한국의류산업학회지 Vol.19 No.5

The purpose of this study was to identify the socio-psychological variables and demographic factors influencing the difficulty people may have in discarding fashion goods. In addition, differences of disposal behavior were investigated according to the degree of reported difficulty with which people discarded fashion goods. A total of 260 survey questionnaires were analyzed. Frequency, correlation, exploratory factor analysis, reliability, t-test and multiple regression analyses were used for data analysis using SPSS 22.0. The study results were as follows. First, the difficulty of discarding of fashion goods was positively affected by concern for the environment and the potential for creative reuse of fashion goods, whereas it was not influenced by interdependence. Second, there were differences in the difficulty with which people discarded fashion goods according to demographic factors such as gender and whether or not they held certain religious beliefs; however, there were no differences among other demographic factors. Third, the group demonstrating a high degree of difficulty in discarding fashion goods preferred certain disposal behaviors such as donating to religious organizations, schools, charities etc., exchanging with other people or bartering, reforming for other purposes, selling to secondhand shops or on the internet, storing without wearing it, or discarding it after salvaging reusable parts. The results of this study provide various guidelines for consumers and retailers of fashion products who are interested in the efficient disposal of fashion goods.

Effect of glycerin on the surface hardness of composites after curing

박현희,이인복,Park, Hyun-Hee,Lee, In-Bog The Korean Academy of Conservative Dentistry 2011 Restorative Dentistry & Endodontics Vol.36 No.6

연구목적: 본 연구의 목적은 글리세린의 도포가 복합레진의 중합 후 표면경도에 미치는 효과를 알아보고자 하였다. 연구 재료 및 방법: 디스크 형태의 황동 몰드에 복합레진(Z-250, 3M ESPE)을 충전 후 다음과 같이 광중합 하였다. 1군(대조군)은 복합레진 표면을 공기 중에 노출한 후 40초 동안 광조사, 2군은 표면을 Mylar strip으로 덮은 후 40초 광조사, 3군은 표면을 glycerin으로 도포 후 40초 광조사, 4군은 공기 중에 노출시켜 20초 광조사한 다음 시편 표면에 glycerin으로 도포한 후 추가로 20초 동안 광조사 하였다. 각 그룹당 20개의 시편을 준비하였고, 연마 후 또는 연마를 하지 않고 시편의 표면경도를 측정하였다. 5일 후 각 시편의 표면경도를 재 측정하였다. 데이터는 three-way ANOVA와 Tukey's post hoc test를 이용하여 분석하였다. 결과: 중합 직 후, 연마하지 않은 시편의 표면경도는 2군 > 3군 > 4군 > 1군의 순이었다. 연마한 경우 각 군 사이의 유의한 차이는 없었다. 같은 군 내에서는 5일 후 표면경도가 중합 직 후 보다 증가하였고 연마한 경우가 연마하지 않은 경우보다 더 높은 표면경도를 나타냈다. 결론: 중합 후 복합레진의 표면경도를 증가시키기 위한 가장 좋은 방법은 연마였고, 중합 전 Mylar strip의 사용이나 glycerin의 도포 역시 중합된 복합레진의 표면경도를 증가시켰다. Objectives: The purpose of this study was to examine the effect of glycerin topical application on the surface hardness of composite after curing. Materials and Methods: A composite (Z-250, 3M ESPE) was packed into a disc-shaped brass mold and light cured according to one of the following protocols. Group 1 (control) was exposed to air and light cured for 40 sec, group 2 was covered with a Mylar strip and light cured for 40 sec, group 3 was surface coated with glycerin and light cured for 40 sec, and group 4 was exposed to air and light cured for 20 sec and then surface coated with glycerin and cured for additional 20 sec. Twenty specimens were prepared for each group. The surface hardnesses of specimens were measured with or without polishing. Five days later, the surface hardness of each specimen was measured again. Data were analyzed by three-way ANOVA and Tukey's post hoc tests. Results: The surface hardnesses of the unpolished specimens immediately after curing decreased in the following order: group 2 > 3 > 4 > 1. For the polished specimens, there was no significant difference among the groups. Within the same group, the hardness measured after five days was increased compared to that immediately after curing, and the polished specimens showed greater hardness than did the unpolished specimens. Conclusions: The most effective way to increase the surface hardness of composite is polishing after curing. The uses of a Mylar strip or glycerin topical application before curing is recommended.

Fisher 선형 분류법을 이용한 비정상 트래픽 탐지

박현희,김미정,강철희,Park, Hyun-Hee,Kim, Mee-Joung,Kang, Chul-Hee 한국전기전자학회 2009 전기전자학회논문지 Vol.13 No.2

최근 인터넷을 통한 각종 침해사고 및 트래픽 폭주와 같은 현상이 급격하게 증가함에 따라 네트워크의 비정상적 상황을 조기에 탐지하기 위한 보다 능동적이고 진보적인 기술이 요구되고 있다. 본 논문에서는 캠퍼스 네트워크와 같이 트래픽이 주기적인 특성을 띠는 환경에서 Fisher 선형 분류법(FLD)을 사용하여 트래픽을 두 개의 그룹으로 분류하고, 네트워크에 유입되는 트래픽이 어떤 그룹에 속하는지를 판별하는 기법을 제안한다. 이를 위해 WISE-Mon이라 불리는 트래픽 분석 시스템을 개발하여 캠퍼스 네트워크의 트래픽을 수집하고 이를 모니터링해서 분석을 수행한다. 생성된 트래픽의 training set을 이용하여 비정상 트래픽의 범위를 판단하기 위한 chi-square distribution을 유도하고, FLD를 적용하여 유입되는 트래픽을 두 그룹으로 분리하기 위한 초평면 (hyperplane)을 만든다. 또한 네트워크 내의 트래픽 패턴이 시간이 지남에 따라 계속적으로 변하는 상황을 반영하기 위하여 self-learning 알고리즘을 적용한다. 캠퍼스 네트워크의 트래픽을 적용한 수학적 결과를 통하여 제안하는 기법의 정확성과 신뢰도를 보여준다. Traffic anomaly detection is one of important technology that should be considered in network security and administration. In this paper, we propose an abnormal traffic detection mechanism that includes traffic monitoring and traffic analysis. We develop analytical passive monitoring system called WISE-Mon which can inspect traffic behavior. We establish a criterion by analyzing the characteristics of a traffic training set. To detect abnormal traffic, we derive a hyperplane by using Fisher linear discriminant and chi-square distribution as well as the analyzed characteristics of traffic. Our mechanism can support reliable results for traffic anomaly detection and is compatible to real-time detection. In addition, since the trend of traffic can be changed as time passes, the hyperplane has to be updated periodically to reflect the changes. Accordingly, we consider the self-learning algorithm which reflects the trend of the traffic and so enables to increase the pliability of detection probability. Numerical results are presented to validate the accuracy of proposed mechanism. It shows that the proposed mechanism is reliable and relevant for traffic anomaly detection.

농산물 수출결정요인이 수출확대에 미치는 효과 분석

박현희(Hyun-Hee Park) 한국무역연구원 2021 무역연구 Vol.17 No.5

Purpose - Globalization has made it possible to divide and specialize across borders, and efficiency-oriented production and consumption have become mainstream. In particular, following COVID-19, the global supply chain has faced a crisis, promoting the localization of supply chains that expand domestic production, and focusing on daily necessities, national strategic products, and food. This study recognizes the structural changes in the agricultural product market in the process of promoting globalization and attempts to estimate the effect of the determinants of the export of agricultural products in Korea on exports. Design/Methodology/Approach - This study aims to analyze the effect on the export of agricultural products by deriving export demand factors for Korean agricultural products from 1996 to 2019 targeting 28 countries that have signed FTAs with Korea. As for the analysis method, the most generalized panel analysis is used to analyze time series data and cross-sectional analysis data. Findings - As a result of estimating the export demand function of agricultural products, it was estimated that the other nation s income (GDP), per capita income (PGDP), exchange rate (EXR), and free trade agreement (FTA), which are determinants of agricultural exports, affected Korea s agricultural products. In particular, it was found that a Free Trade Agreement (FTA) greatly contributed to the expansion of agricultural exports. However, contrary to the analysis expectations, it was analyzed that the relative price index (REPRI) did not directly affect exports. Research Implications - This study derives the most representative variable among the export determinants on the export of Korean agricultural products covered in previous studies whether it actually affects export expansion. Based on the estimated results, it is meaningful in that it presented the necessity of exporting agricultural products to improve income and competitiveness in the domestic agricultural sector.

보문 : 혁신성과 가격민감도가 스마트의류의 구매의도에 미치는 영향

박현희 ( Hyun Hee Park ),노미진 ( Mi Jin Noh ) 한국의류학회 2012 한국의류학회지 Vol.36 No.2

This study examines the influence of innovativeness and price sensitivity on the purchase intention of smart wear. A total of 211 copies of data were analyzed to investigate a structural model and test research hypotheses using AMOS 7.0 package. The results were summarized as follows. First, fashion innovativeness and technology innovativeness negatively affected price sensitivity; however, information innovativeness positively affected price sensitivity. Second, technology innovativeness positively affected the purchase intention of smart wear; however, fashion innovativeness and information innovativeness did not affect the purchase intention of smart wear. Third, price sensitivity negatively influenced the purchase intention of smart wear. This study is useful for marketers and managers who establish marketing and a price strategy for smart wear in an exploration of the relation of consumer innovativeness, price sensitivity, and the purchase intention of smart wear.

태블릿 PC를 활용한 동영상 교육이 경피적 관상동맥중재술 환자의 불안, 활력 징후, 통증 및 지식 정도에 미치는 효과

박현희(Park, Hyun Hee),정계선(Jeong, Gye Seon) 한국성인간호학회 2021 성인간호학회지 Vol.33 No.2

유아부모효능감 검사도구 개발 및 타당화

박현희 ( Park Hyun Hee ),이경화 ( Lee Kyung-hwa ) 열린부모교육학회 2020 열린부모교육연구 Vol.12 No.3

본 연구의 목적은 유아부모가 지닌 부모로서의 효능감을 신뢰롭고 타당하게 측정할 수 있는 유아부모 효능감 검사도구를 개발하고 타당화하는 것이다. 따라서 ‘유아부모 효능감의 개념과 구성요인은 무엇인가? 유아부모 효능감 검사도구는 타당한가?’라는 연구문제를 설정하였다. 연구대상은 서울과 경기 지역에 거주하고 다양한 직업에 종사하고 있는 20~50대의 부모 400명이다. 검사도구 개발 절차를 살펴보면 첫째, 1, 2차 전문가 조사를 실시하여 유아부모효능감의 개념, 구성요인 도출 및 예비문항 개발을 하였다. 둘째, 수집된 테이터로 탐색적 요인분석과 확인적 요인분석을 실시하여 검사도구의 타당도를 확인하였다. 본 연구의 결과, 첫째로 유아부모효능감이란 유아기 자녀의 발달단계에 따라 적합한 부모역할을 수행하며 자녀와의 문제를 효과적으로 대처할 수 있는 부모 스스로의 능력에 대한 지각으로 정의하였다. 둘째로 탐색적 요인분석을 통해 유아부모 효능감 검사 도구는 세 가지(유아부모의 자아 효능감, 양육행동 효능감, 사회적 역할수행 효능감) 영역과 여덟 개의 측정변인으로 구성되었음을 확인하였다. 셋째로 문항내적 일관성과 신뢰도를 분석하여 본 검사도구가 수용 가능한 수준임을 확인하였다. 넷째로 확인적 요인분석을 통해 유아부모 효능감의 측정모형 타당도를 확인하였다. 본 연구의 결과는 유아부모들의 부모효능감을 신뢰롭고 타당하게 측정할 수 있도록, 세 영역과 여덟 개 측정변인의 총 26문항으로 구성되었다. The purpose of this study was to develop and validate the test that can measure young children’s parents efficacy. For this purpose, research questions were set as follows. First, what are the concepts and components of young children’s parents efficacy test? Second, is the young children’s parents efficacy test valid and reliable? The 400 young children’s parents with various job in Seoul and Kyungi-Do were participated for a main survey. Then two rounds of panel survey were conducted in order to identify content validity about the deduced concept and construct and initial items. As the result of thepanel survey, three domains and eight sub-factors of young children’s parents efficacy test were identified. The results were as follows. First, the young children’s parent efficacy was defined as the perception of parents' ability to effectively deal with problems with their children by performing appropriate parental roles according to the developmental stages of early childhood children. Second, through exploratory factor analysis, it was confirmed that the young children’s parent efficacy test consisted of three domains and eight measurement variables. The three domains were divided into self-efficacy, parenting behavior, and social role performance in terms of personal, parenting behavior, and social role performance. Third, the internal consistency and reliability of the items were analyzed to confirm that the test tool is acceptable. In conclusion, this study developed a tool for testing the efficacy of young children's parents, which consists of 26 questions, which are three domains and eight measurement variables, to measure the efficacy of young children's parents in a reliable and reasonable method.