회색공간을 적신 봄비

이진연 한국사법행정학회 1970 사법행정 Vol.11 No.10

조직구조의 영향을 고려한 비즈니스 프로세스 통합 분석 방법론 개발

이진연,이승훈,권충일,최인준 대한산업공학회 2015 대한산업공학회 춘계학술대회논문집 Vol.2015 No.4

Recently, organizations need to change or redesign their business process and/or organizational structure, more frequently to adapt to the rapidly changing environment. Most existing studies, however, do not always provide optimized outcomes since the redesigned processes do not fit various organizational factors and vice versa. This study presents an integrated methodology for evaluation and redesign of business processes and organizational design factors. These results will provide scientific solutions to the important problem of optimal design of business process and organization.

반도체 FAB 생산 최적화 적용 사례

이진연,이승호,유준상,류재현,김기홍,박성하 한국경영과학회 2023 한국경영과학회 학술대회논문집 Vol.2023 No.5

동(Cu) 함유 슬러지로부터 동 전해정련을 이용한 미세 동 분말 합성에 관한 연구

이진연,손성호,박성철,정연재,김용환,이만승,Lee, Jin-Yeon,Son, Seong Ho,Park, Sung Cheol,Jung, Yeon Jae,Kim, Yong Hwan,Lee, Man-seung 한국자원리싸이클링학회 2018 資源 리싸이클링 Vol.27 No.6

In this study, copper was recovered from copper containing sludge by selectively controlling electro-refining process conditions in copper sulfate electrolyte solution. Electro-refining process was performed by LSV (Linear Sweep Voltammetry) result according to copper sulfate electrolyte solution concentration, applied current density, additive type and concentration. SEM (Scanning Electron Microscope) and PSA (Particle Size Analyzer) were used to analyze the shape and size of copper powder. In the 0.1 ~ 0.4 M copper sulfate electrolyte solution without organic additives, the copper powder size decreased as the applied current density became closer to the limiting current density and the copper powder size tended to decrease in 0.2 ~ 0.3 M copper sulfate electrolyte solution. In addition, when the shape and size of the copper powder were analyzed by adding various types and concentrations of organic additives to the previous experimental, fine spherical copper powder having the smallest size (nm) was obtained under the condition of cellulose type additive 2,000 ppm.

CDI 공정에서 Alginic Acid Sodium Salt의 파울링 현상 확인 및 제거 조건 확립

이진연,임지원 한국막학회 2020 멤브레인 Vol.30 No.5

In this study, we suggest conditions to reduce fouling in capacitive deionization (CDI) caused by alginic acid sodium salt, one of the most common fouling-causing substances in natural water and wastewater management. First, NaCl is used as feed material, which is selected as the control of the experiment. As expected, fouling phenomena is not observed from NaCl. On the other hand, when alginic acid sodium salt is added to the inlet, the fouling phenomena can be observed. In order to minimize the fouling phenomena, the feed concentration of alginic acid sodium salt, applied potential during desorption process, and duration of applied potential to our CDI cell are controlled. With 7 mg/L of feed stream concentration, CDI performed using 1.2 V for 1 min during adsorption followed by desorption with -2 V for 1 min exhibited the highest alginic acid salt removal efficiency reaching 50.07%. 본 연구에서는 자연수, 하폐수에 많이 포함되어 있는 파울링 유발 물질 중 하나인 alginic acid sodium salt를 축전식 탈염공정(capacity deionization, CDI)에서 파울링 감소를 위한 조건을 확립하고자 한다. 먼저 feed 물질로 NaCl을 사용하였다. 이는 파울링 발생에 대한 비교 물질로, 파울링이 발생하지 않음을 관찰하였다. Alginic acid sodium salt를 사용하여 파울링 발생 여부를 확인하였다. 농도는 7 mg/L, 흡착 1.2 V 5 min, 탈착 -2 V 1 min에서 효율이 50.07%으로 제일 효율적인 탈착 조건임을 알 수 있었다.

Synthesis of PtNi Alloy Nanoparticles and Their Enhanced Electrochemical Properties

이진연,이영우,곽다희,황의탁,이슬,박경원 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.0

영어 쓰기에서 자동 쓰기 평가 시스템(AWE)의 효과적 활용을 위한 교수전략 개발 연구

이진연,임은선,임철일 한국교육정보미디어학회 2023 교육정보미디어연구 Vol.29 No.2

In English education, writing is an essential learning area for fostering communication skills, but the importance of writing education is overlooked. As a cause, it is pointed out that it is difficult for instructors to provide individual feedback on all learners’ writing processes and results in a timely, due to time limitations. Automated Writing Evaluation(AWE) has the potential to solve these educational problems, in that it can provide learners with personalized feedback and scoring. However, since AWE has limitations such as technical errors and insufficient feedback, research on instructional design research is needed to effectively utilize AWE. Therefore, this study aims to develop teaching strategies for the effective use of AWE in the actual English writing education field and verify their validity, by using model research(Type 2) of design and development research. As a result, eight initial teaching strategies and 23 sub-detailed guidelines were developed. As a result of internal validation through three times of expert validation, high evaluation results are confirmed in terms of validity, explanation, usefulness, and understanding, and both CVI and IRA were 1.00 point, confirming that the teaching strategies are valid. As a result of external validation through field application, learners’ high satisfaction with the class applying these teaching strategies was found(M=4.44), and in particular, learners agreed highly with the teaching strategy at the ‘during writing’ stage. Based on the results of internal and external validation, eight teaching strategies and 27 sub-detailed guidelines were finally developed. 영어 교육에서 쓰기는 의사소통 역량 함양에 있어 필수적인 학습 영역이지만, 쓰기 교육에 대한 중요성은 간과되고 있다. 이에 대한 원인으로 교수자들이 시간적 한계로 인해 모든 학습자의 쓰기 결과물에 대해 개별적 피드백을 적시에 제공하기 어렵다는 점이 지적된다. 인공지능 기술을 기반으로 하는 자동 쓰기 평가 시스템(Automated Wrting Evalaution, AWE)은 학습자에게 개인화된 채점 및 피드백을 실시간으로 제공할 수 있다는 점에서 이러한 교육적 문제를 해결할 수 있는 가능성을 지닌다. 그러나 AWE는 시스템의 기술적 오류, 불충분한 피드백 제공 등의 한계를 지니고 있으므로 AWE를 효과적으로 활용하기 위해서는 교수설계적 처치에 대한 연구가 필요하다. 따라서 본 연구에서는 Richey와 Klein(2007)의 설계․개발 연구 중 모형 연구(유형2)를 적용하여 실제 영어 교육 현장에서 AWE의 효과적인 활용을 위한 교수전략을 개발하고 그 타당성을 검증하는 것을 목적으로 한다. 연구 결과 영어 쓰기에서의 AWE의 효과적 활용을 위한 8개의 초기 교수전략 및 23개의 하위 상세지침을 개발되었으며, 총 3차례의 전문가 타당화를 통한 내적 타당성 검증, 5주 간의 현장 적용을 통한 외적 타당성 검증을 실시하였다. 내적 타당화 결과, 타당성, 설명력, 유용성, 보편성, 이해도 측면에서 모두 높은 평정 결과를 확인할 수 있었으며, CVI와 IRA가 모두 1.00점으로 교수전략이 타당함을 확인하였다. 외적 타당화 결과, 본 교수전략을 적용한 수업에 대한 학습자들의 높은 만족도(M=4.44)가 나타났으며, 특히 ‘쓰기 중’ 단계의 교수전략에 대해 학습자들이 높게 동의함을 확인하였다. 내적 및 외적 타당화 결과를 바탕으로 최종적으로 8개의 교수전략과 27개의 하위 상세지침을 개발하였다.

『古事記』에 보이는 希望表現에 관한 고찰

이진연 대한일어일문학회 2015 일어일문학 Vol.65 No.-

The most widely used “Hope Expressions" in Japanese are「~たい」and「~てほしい」. In Japanese ancient documents, those expressions are usually denoted by two Chinese letters,「Yoku(欲)」and「Gan (願)」. Investigating usage of the letters would help understand their meaning and sentence structuring. Mori Hiromichi(1999) stated in his「日本書紀區分論」that『Nihonshoki(日本書紀)』is compiled by α group, which is described in Classical Chinese, and β group, which is described in Japanese Style Chinese, and「Yoku」and「Gan」were used differently in those two groups.「Yoku」generally represents ‘wish’ in both α and β groups, however,「Gan」corresponds to both ‘wish’ and ‘desire’ in α group and mostly represents ‘desire’ in β group. In『Kojiki(古事記)』, which is written in Japanese Style Chinese, 「Yoku」represents ‘wish’ and「Gan」corresponds to ‘desire’, which is similar to the β group of 『Nihonshoki』. But In『Kojiki』,「Yoku」is unilaterally used where「Gan」could be compatible with, and「Gan」only appears where「Yoku」is unacceptable, demonstrating its own methods of application in hope expression. Specific results of analysis are as follows. First,「Yoku」is less tied to person and tense in usage compared with「Gan」, and include meaning of 〔願望-表出〕desire revelation,〔願望-說明〕desire description,〔希求-表出〕wish revelation and〔希求-說明〕wish description, allowing wider meaning area than that of「Gan」. Secondly, in meaning area of〔願望-表出〕desire revelation,「Yoku」and「Gan」are interchangeable but there is a difference in the shade of meaning between the two words.「Yoku」is used to show speakers’ inner talks about subjective views, like <思>, meanwhile,「Gan」is for external illocutions, seeking listeners’ understanding. Thirdly, in the meaning area of「願望-說明〕desire description,「Yoku」is incompatible with「Gan」, as 「Yoku」is interpreted as assertion or assumption of third person narrator’s feeling. Lastly, in〔希求-表出〕wish revelation,「Yoku」is used as an auxiliary verb and「Gan」is used as an adverb, showing their incompatibility in using.

저품위 동(Cu) 함유 슬러지로부터 동 전해정련에 관한 연구

이진연,손성호,박성철,정연재,김용환,한철웅,이만승,이기웅,Lee, Jin-Yeon,Son, Seong Ho,Park, Sung Cheol,Jung, Yeon Jae,Kim, Yong Hwan,Han, Chul Woong,Lee, Man-seung,Lee, Ki-Woong 한국자원리싸이클링학회 2017 資源 리싸이클링 Vol.26 No.6

저품위 동 함유 슬러지로부터 회수된 동 조금속을 황산구리 전해액에서 전해정련을 수행하여 고순도 동을 회수하고자 하였다. 유기첨가제 종류 및 농도에 따른 전해정련동 표면 형상 및 조도를 분석하였을 때, gelatin계 유기첨가제 5 ppm 및 thiol계 유기첨가제 5~10 ppm 혼합 조건에서 가장 우수한 표면 형상을 얻을 수 있었다. 건식환원공정을 통해 회수한 철(Fe), 니켈(Ni), 코발트(Co) 및 주석(Sn) 등의 불순물이 함유된 각 86.635, 94.969 및 99.917 wt.% 순도의 동 조금속을 사용하여 전해정련하였고, 순도 3N~4N급 전해정련동을 얻을 수 있었다. 동 조금속, 전해액, 전해정련동의 불순 원소 농도 및 동 순도 등의 분석을 통해, 순도 99.99 wt.% 이상 전해정련동을 회수할 수 있는 전해정련 공정시간 및 동 조금속 순도를 도출하였다. The electro-refining process was performed to recovery high purity copper from low grade copper containing sludge in sulfuric acid. The surface morphologies and roughness of electro-refining copper were analyzed with variation of the type and concentration of organic additives, the best surface morphology was obtained 5 ppm of the gelatin type and 5 to 10 ppm of the thiol type organic additive. The crude metal consisted of copper with 86.635, 94.969 and 99.917 wt.%, several impurity metals of iron, nickel, cobalt and tin by pyro-metallurgical process. After electro-refining process, the purity of copper increases to 3N or 4N grade. The impurity concentrations and copper purities of copper crude metals, electrolyte and electro-refining copper were analyzed using ICP-OES, the electro-refining time and purity of copper crude metal to recover 4N grade copper were deduced.

반도체 FAB 생산 최적화 적용 사례

이진연,이승호,유준상,류재현,김기홍,박성하 대한산업공학회 2023 대한산업공학회 춘계학술대회논문집 Vol.2023 No.5