유아 문해 교육을 위한 그림책 기반 부모교육 프로그램의 효과연구

김근희,연혜민 한국어린이미디어학회 2017 한국어린이미디어학회 학술대회 자료집 Vol.2017 No.10

본 연구의 목적은 유아 문해 교육을 위한 그림책 기반 부모교육 프로그램이 유아의 언어능력에 미치는 효과를 알아보는 것이다. 이를 위해 서울 G구에 위치한 어린이집 3군데 만 5세 부모와 유아 총54쌍을 연구대상으로 하였으며 프로그램을 실행한 실험집단, 그림책만 읽은 비교집단, 어떤 조치도 하지 않은 통제집단 각 18쌍씩 구성하였다. 연구도구는 유아의 환경인쇄물 읽기능력 연구도구, 유아의 수용 · 표현 어휘력 검사도구(REVT)를 사용하였다. 본 프로그램의 효과를 검증하기 위해 사전과 사후에 검사를 실시하였고, 수집된 자료는 공분산분석을 하였다. 연구결과, 유아 문해 교육을 위한 그림책 기반 부모교육프로그램은 유아의 환경인쇄물 읽기능력과 표현 어휘력에 긍정적인 효과가 있었다. 유아 문해 교육을 위한 그림책 기반 부모교육 프로그램은 유아교육현장에서 유아의 언어교육을 위해 부모를 대상으로 활용되어야 할 것이다. The purpose of this study is researching effects of picture book based parent education program on young children`s literacy education. For this purpose, the comparative method was conducted with 54 teams which includes parents and 5-year-old child each, in 3 childcare centers in G area of Seoul. The participants were divided in three groups. One group attended educational program, other group read picture books without education, and the other didn`t receive any instruction. Each groups has 18 teams. The test of reading ability for printed text for children and Receptive and Expressive Vocabulary Test, REVT were used as research tools. To verify the effect of the program, the tests were conducted twice, before and after researching. The collected data were analyzed with covariance analysis method. According to the result of this study, Picture-Book Based Parent Education Program has positive effect on children`s ability of reading, vocabulary expressing. Picture-Book Based Parent Education Program on Young Children’s Literacy Education need to be utilized in children education field for language education of children.

구술평가, 인터뷰부터 좌담회까지

김근희 전국국어교사모임 2022 함께여는 국어교육 Vol.- No.146

pH Sensitive Soft Contact Lens for Selective Drug-Delivery

김근희,김혁정,노혜란 한국고분자학회 2018 Macromolecular Research Vol.26 No.3

In this study, we evaluated contact lenses as drug delivery media and the effect of tear physiological pH on drug release behavior. Anionic or cationic hydroxyethyl methacrylate (HEMA) lenses were polymerized with either vinylpyrrolidone (VP) or N-isopropylacrylamide (NIPAAm). The pH of artificial tears was prepared as between 5.8 and 8.35. One of common treatments, hydroxypropyl methylcellulose (HPMC), to dry eye disease was used as a test drug. As a result, drug releases from anionic 100% p-HEMA and p-HEMA-VP lens were both increased with increasing tear pH. However, released drug amounts from cationic the p-HEMA-NIPAAm lens were decreased with increasing pH. In weak basicity (pH 8.03), the p-HEMA-VP (20 wt%) lens swelled resulting releasing drugs 3.5 times more compared to in weak acidity (pH 5.80). On the other hand, the p-HEMA-NIPAAm (20 wt%) lens de-swelled in basic solution resulting decreased drug release compared to in acidic solution. The hydrogel contact lenses showed various physical properties and drug releasing properties including diffusion coefficients in response to ionization reactions between ionic groups in the lens and pH of solution. It suggests that hydrogel contact lens has potential as selective drug delivery media.

Influence of Solution pH on Drug Release from Ionic Hydrogel Lens

김근희,김혁정,노혜란 한국고분자학회 2019 Macromolecular Research Vol.27 No.2

Hydrogel contact lenses have shown the possibility for uses in ophthalmological treatment for the last decades. Moreover, structural changes responsive to solution pH have given further applications toward more complicated drug delivery for physiological and pathological states of a wearer. However, unpredicted variables, swelling degree, and polymer degeneration, have been hurdles for the evaluation and quantification of a designed pharmaceutic system. Many scientists believe understanding empirical/semi-empirical mechanisms behind the drug release can offer simple solutions to quantify and furthermore control the drug release. In this study, we developed silicon-copolymerized hydrogel contact lenses with various functional monomers for delivery of hydroxypropyl methylcellulose, one of the commonly used dry eye drugs. Under the physiological pH, the prepared hydrogels showed different swelling reactions in response to ionic interaction. In addition, analysis of the pH sensitivity and maximum release amounts against the artificial tear pH suggested possible molecular changes in the functional groups and swelling behaviors. Accordingly, the mathematical parameters were calculated to better understand the drug release mechanism from hydrogels. By evaluating these parameters, the primary rate-limiting factors of the silicone hydrogel contact lenses were determined at the investigated pH. These results, with the simple mechanistic study, imply the potentials of silicone hydrogel contact lens in controlled drug delivery under the physiological conditions.

A gamma-type current-mode digital-to-analog converter for active-matrix organic light-emitting diode display drivers

김근희,조규형,김현식,박상휘,방준석 한국정보디스플레이학회 2014 Journal of information display Vol.15 No.4

This paper describes the design of a gamma-type current-mode digital-to-analog converter (DAC) for active-matrix organiclight-emitting diode display (AMOLED) drivers. The proposed nonlinear DAC is composed of division-based bypassingDAC units for gamma correction. This multiple stack of DAC units dramatically reduces the chip size of the display driverwhile realizing more natural gamma correction. Moreover, it does not require an additional memory, such as a digital lookuptable block and a DAC with a higher resolution, which can achieve significant manufacturing cost savings. Consequently,the proposed multi-stacked gamma-type DAC provides high area efficiency, low cost, and more natural gamma correction. The prototype 8-bit DAC is implemented in a TowerJazz 3.3 V CMOS process. The simulated gamma values of the doubleandtriple-stacked DAC units are varied from 1 to 2 and from 1 to 3, respectively. In addition, the Monte-Carlo simulationdemenstrates that the proposed design shows uniform gamma transfer curves regardless of the process variation.

정조의 『대학』 해석의 특징에 관한 고찰 - 명덕본심설을 중심으로 -

김근희 원광대학교 원불교사상연구원 2024 원불교사상연구원 학술대회 Vol.2024 No.2

Consistency check algorithm for validation and re-diagnosis to improve the accuracy of abnormality diagnosis in nuclear power plants

김근희,김재민,신지현,이승준 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.10

The diagnosis of abnormalities in a nuclear power plant is essential to maintain power plant safety. When an abnormal event occurs, the operator diagnoses the event and selects the appropriate abnormal operating procedures and sub-procedures to implement the necessary measures. To support this, abnormality diagnosis systems using data-driven methods such as artificial neural networks and convolutional neural networks have been developed. However, data-driven models cannot always guarantee an accurate diagnosis because they cannot simulate all possible abnormal events. Therefore, abnormality diagnosis systems should be able to detect their own potential misdiagnosis. This paper proposes a rulebased diagnostic validation algorithm using a previously developed two-stage diagnosis model in abnormal situations. We analyzed the diagnostic results of the sub-procedure stage when the first diagnostic results were inaccurate and derived a rule to filter the inconsistent sub-procedure diagnostic results, which may be inaccurate diagnoses. In a case study, two abnormality diagnosis models were built using gated recurrent units and long short-term memory cells, and consistency checks on the diagnostic results from both models were performed to detect any inconsistencies. Based on this, a re-diagnosis was performed to select the label of the second-best value in the first diagnosis, after which the diagnosis accuracy increased. That is, the model proposed in this study made it possible to detect diagnostic failures by the developed consistency check of the sub-procedure diagnostic results. The consistency check process has the advantage that the operator can review the results and increase the diagnosis success rate by performing additional re-diagnoses. The developed model is expected to have increased applicability as an operator support system in terms of selecting the appropriate AOPs and subprocedures with re-diagnosis, thereby further increasing abnormal event diagnostic accuracy

클라우드 환경에서 주식 체결 시스템의 저지연 극복에 관한 연구

김근희,문석재,윤창표,이대성,Kim, Keun-Heui,Moon, Seok-Jae,Yoon, Chang-Pyo,Lee, Dae-Sung 한국정보통신학회 2014 한국정보통신학회논문지 Vol.18 No.11

증권 시스템의 저지연(Low Latency)을 최소화하고 처리 속도 향상을 위해 다양한 기술(Socket Direct Protocol, TCP/IP Offload Engine)이 도입되고 있다. 그러나 고가의 네트워크 장비 지원으로는 속도 개선에 한계가 있으며, 도입 효과 또한 낮은 것이 현실이다. 본 논문에서는 클라우드 환경에서 주식 체결 시스템의 저지연 극복을 위한 SPT(Safe Proper Time) 전송 방식을 제안한다. 이 제안 기법은 커널에 대한 이해를 기반으로 CPU 오버헤드를 줄이기 위해 CPI(Cycle Per Instruction)를 최소화하고, 데이터 전송의 적시성을 만족하는 전송 방식이다. To minimize low latency and improve the processing speed of the stock trading system, various technologies have been introduced. However, expensive network equipment has limitation for improving speed of trading system. Also, it is true that there is not much advantage by introducing those kind of systems. In this paper, we propose a low-Latency SPT(Safe Proper Time) scheme for overcoming the stock trading system in a cloud. The proposed method minimizes the CPI in order to reduce the CPU overhead that is based on the understanding of the kernel. and this approach satisfies the data timeliness.

길을 잃어도 괜찮아

김근희 샘터사 2022 월간 샘터 Vol.630 No.-

20대 이후 성인의 연령별 시기능 변화 연구

김근희,문혜경,노혜란 대한시과학회 2014 대한시과학회지 Vol.16 No.3

Purpose: This study aimed to determine age-dependent changes in visual function and phoria. Methods: A total of 200 patients (131 men and 69 women) without ophthalmological or systemic disorders underwent diagnostic interviews. The following elements of visual function were assessed in the dominant eye in triplicate using a control target (near point rod), a PD ruler, and a phoropter. Results: The average age of the study group was 39.57±11.41 years(men, 39.56±10.50 years; women, 39.58±13.06 years). In 168 subjects(84%), the right eye (OS) was dominant, while in 32 subjects (16%), it was the left eye(OD). The mean dominant-eye exophthalmetry was 13.62±1.07mm; myopia, –2.48±1.91 D; exophoria at distance, 3.51±1.78 ∆; exophoria at near, 5.73±2.44∆; near point of convergence, 9.63±2.82cm; and near point of accommodation, 21.73±10.28cm. Exophoria at distance, exophoria at near, and exophthalmetry were significantly increased with age while near point of convergence, near point of accommodation, and esophoria at distance were significantly decreased. Although esophoria at near showed a decreasing trend with age, this failed to reach statistical significance. Myopia, astigmatism, and naked vision were not affected by increasing age. Conclusions: Exophoria and esophoria at distance, exophoria at near, near point of convergence, near point of accommodation, and exophthalmetry were increased with age. On the other hand, esophoria at near was decreased, and myopia, astigmatism, and naked vision showed an even distribution regardless of age. 목 적: 20대 이후 성인의 연령에 따른 시기능의 변화를 이해하고자 하였다. 방 법: 눈의 이상 질환과 전신질환이 없는 성인 남녀 200명의 우세안을 기준으로 시기능 요소를 조절타깃(근점봉), PD자, 그리고 포롭터를 사용하여 3회 반복 검사하였다. 결 과: 전체 연령 평균은 39.57±11.41세이고 남자 131명 39.56±10.50세, 여자 69명 39.58±13.06세이었다. 우안 우세안은 168명(84%), 좌안 우세안은 32명(16%)으로 나타났다. 우세안에서 안구돌출도 13.62±1.07mm, 근시도 –2.48±1.91D, 원거리 외사위 3.51±1.78∆, 근거리 외사위 5.73±2.44∆, 폭주근점 9.63±2.82cm 그리고 조절근점 21.73±10.28cm로 나타났다. 연령에 따른 원거리 외사위, 근거리 외사위, 안구돌출도는 유의하게 증가하였고 폭주근점, 조절근점, 원거리 내사위도는 유의하게 감소하였다. 근거리 내사위도는 연령증가에 따라 감소하는 경향을 보였으나 유의성은 없었다. 근시, 난시, 나안시력은 연령의 증가와는 관련성은 보이지 않았다. 결 론: 연령이 증가할수록 원거리 외사위, 원거리 내사위, 근거리 외사위, 폭주근점, 조절근점 그리고 안구돌출도는 증가하였다. 반면 근거리 내사위는 감소하였고, 근시, 난시 그리고 나안시력은 연령에 관계없이 전체적으로 고른 분포를 보였다.