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황희진,신기일,Hwang, Hee-Jin,Shin, Key-Il 한국통계학회 2009 응용통계연구 Vol.22 No.2
국내외적으로 지역통계에 관한 관심이 높아지고 있으며 이와 관련하여 소지역 추정에 관한 많은 연구가 진행되고 있다. 소지역 추정에 사용되는 추정량의 대부분은 MSE(moan squared error)를 최소화하여 얻어진다 (Rao, 2003). 최근 황희진과 신기일 (2008)은 MSPE(mean squared percentage error)를 최소화하는 추정량을 사용한 소지역 추정법을 제안하였다. 본 논문에서는 노동통계 중 지청별 일인당 평균 임금총액 추정에 황희진과 신기일 (2008)이 제안한 방법을 적용하여 보았으며 2007년 매월 노동통계 자료를 이용하여 기존의 MSE를 최소화 하여 얻어진 여러 추정량과 우수성을 비교해 보았다. 또한 노동통계를 위 한 소지역 추정의 실제 사용 가능성을 살펴보았다. Many researches have been devoted to the small area estimation related with the area level statistics. Almost all of the small area estimation methods are derived based on minimization of mean squared error(MSE). Recently Hwang and Shin (2008) suggested an alternative small area estimation method by minimizing mean squared percentage error. In this paper we apply this small area estimation method to the labor statistics, especially monthly wages by a branch area of labor department. The Monthly Labor Survey data (2007) is used for analysis and comparison of these methods.
강박 구매행동 경험에 관한 현상학적 연구 - 20∼30대 직장여성을 중심으로 -
황희진,김유진,박연심,이영선,천성문 한국재활심리학회 2017 재활심리연구 Vol.24 No.2
The purpose of this study was to explore the essential meaning of compulsive buying experiences in working women in their 20s & 30s. In-depth interviews were conducted with 4 participants in accordance with Giorgi’s method of obtaining analytic material in phenomenological research. As a result, 303 meaning units were deduced, summed up to 114, and then 24 final sub-constituents were categorized as 9 hyper-constituents. The results of analysis are as follows: Compensation for emotional deficiency and subsequent low self-esteem stemming from a lack of, or perceived lack of emotional support from parental figures. Counteractions against parents who tried to control their purchasing activities. An alternative for dealing with stress immediately and legitimately. Comfort in finding someone to help improve their spending habits and the observation of “The cycle of pleasure and regret” will serve as foundational starting points for future quantitative research regarding the spending habits of working women in their 20s & 30s designed to provide basic data on the development of compulsive purchase prevention and treatment programs.
Boron Nitride Nanofibers by the Electrospinning Technique
황희진,Nasser A. M. Barakat,Muzafar A. Kanjwal,Faheem A. Sheikh,김학용,M. F. Abadir 한국고분자학회 2010 Macromolecular Research Vol.18 No.6
An interesting boron nitride ceramic was introduced in nanofibrous form. Boron nitride nanofibers were prepared using a simple and cheap strategy. Calcination of poly(vinyl alcohol) electrospun nanofibers embedded with boron nitride nanoparticles resulted in a nanofibrous form. The electrospun nanofiber mats were prepared by electrospinning of a colloidal solution composed of an aqueous poly(vinyl alcohol) solution and boron nitride nanoparticles. Calcination of the obtained BN/PVA nanofiber mats in an argon atmosphere at 1,000 oC for 5 h resulted in boron nitride nanofibers. The boron nitride nanofibers showed a higher band gap than the nanoparticles; the latter showing a band gap of 2.75 eV. however, the nanofibrous shape enhanced the band gap to 4.52 eV.
황희진,Sunhui Han,전상옥,서조은,Dong-Ho Oh,Seong-Wan Cho,최영욱,이상길 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.8
For the present study, rhEGF was encapsulated into solid lipid nanoparticles (SLNs). The SLNs were prepared by the W1/O/W2 double emulsification method combined with the high pressure homogenization method and the physical properties such as particle size, zeta-potential and encapsulation efficiency were measured. The overall particle morphology of SLNs was investigated using a transmission electron microscopy (TEM). The percutaneous skin permeation and accumulation property of rhEGF was evaluated using Franz diffusion cell system along with confocal laser scanning microscopy (CLSM). The mean particle size of rhEGF-loaded SLNs was 104.00 ± 3.99 nm and the zeta-potential value was in the range of −36.99 ± 0.54 mV, providing a good colloidal stability. The TEM image revealed a spherical shape of SLNs about 100 nm and the encapsulation efficiency was 18.47 ± 0.22%. The skin accumulation of rhEGF was enhanced by SLNs. CLSM image analysis provided that the rhEGF rat skin accumulation is facilitated by an entry of SLNs through the pores of skin.
황희진,니암게렐 얄랄트,이정훈 한국지구과학회 2021 한국지구과학회지 Vol.42 No.4
Several studies investigating the behavior and environmental distribution of rare earth elements (REEs) have been reviewed to determine the geochemical processes that may affect their concentrations and fractionation patterns in groundwater and whether these elements can be used as tracers for groundwater-rock interactions and groundwater flow paths in small catchments. Inductively coupled plasma-mass spectrometry (ICP-MS), equipped with an ultrasonic nebulizer and active-film multiplier detector, is routinely used as an analytical technique to measure REEs in groundwater, facilitating the analysis of dissolved REE geochemistry. This review focuses on the distribution of REEs in groundwater and their application as tracers for groundwater geochemistry. Our review of existing literature suggests that REEs in ice cores can be used as effective tracers for atmospheric particles, aiding the identification of source regions.