일부 대학생의 SNS 사용시간에 따른 자아존중감과 대인관계의 관련성

손희주(HeeJu Son),임나의(Nahee Im),오수현(Suhyeon Oh),박혜빈(Hyebin Park),김경민(Kungmin Kim),김지현(Jihyeon Kim),정금비(Geumbi Jeong),윤현서(Hyunseo Yoon),이정화(JungHwa Lee) 인문사회과학기술융합학회 2018 예술인문사회융합멀티미디어논문지 Vol.8 No.5

본 연구는 일부 대학생의 SNS 사용시간에 따른 자아존중감과 대인관계의 관련성을 파악하고자 시도하였다. 연구기간은 2017년 3월15일부터 2017년 6월 20일까지였으며, 연구대상은 부산지역 대학생 421명이었다. 연구도구는 설문지를 사용하여 SNS 사용문제척도, 자아존중감척도, 대인관계문제척도를 사용하였으며, 자료 분석은 SPSS 프로그램을 사용하였다. 분석결과 SNS사용자들 중 사용하는 이유로‘뒤쳐지고 싶지 않아서’라고 응답한 군에서 SNS사용 문제가 상대적으로 높았고, ‘정보를 얻기 위해서’라고 응답한 군에서는 문제가 상대적으로 낮았다(F=3.674, p=0.000). SNS를 사용하는 시간이 ‘3시간 이상’인 집단에서 상대적으로 자아존중감이 높게 나타났고(F=0.930, p=0.396), SNS를 사용하는 시간이 많을수록 대인관계 문제가 높게 나타났다(F=4.535 p=0.011). 이를 종합 해 보았을 때, SNS 사용시간이 많을수록 SNS 사용으로 인한 문제와 대인관계에 문제가 많았고, 자아존중감은 높아졌다. 그러므로 대인관계를 유지할 수 있도록 오프라인에서 대인관계 강화를 위한 멘토링 및 집단상담 프로그램 등의 확대운영이 필요할 것으로 사료된다. The purpose of this study was to understand the relationship between self esteem and interpersonal relationship between self esteem and interpersonal relationships based on hours of SNS usage time among some university students. The research was conducted from March 15 to June 20, 2017, the subjects of this study were 421 students enrolled in the Busan area. The research tool used a questionnaire measuring problems of SNS usage problem, self esteem scale and interpersonal relations scale and data analysis was used SPSS program. The results showed that the use of SNS was relatively high in the group that responded I do not want to lag , and the problem was relatively low in the group that responded to get information (F=3.674, p=0.000). The self – esteem was relatively high in the group using the SNS for more than 3 hours (F=0.930, p=0.396), and the interpersonal problem was higher in the group using the SNS(F=4.535 p=0.011). In sum, the more time the SNS was used, the more problems and interpersonal problems caused by the use of SNS, and the self-esteem increased. Therefore, in order to maintain interpersonal relationship, it is necessary to expand mentoring and group counseling programs for strengthening interpersonal relationship in offline.

Does the Ownership of Domestic and Foreign State Affect Asymmetric Cost Behavior?

( Heeju Hwang ),( Hyesoo Ko ),( Hosung Son ) 한국회계학회 2021 회계학연구 Vol.46 No.4

The ownership structure of a company affects cost behavior through the governance structure and management's decision-making process. This study examined how the ownership of states affect cost behavior from the perspective of domestic and foreign state ownership by using 13,387 financial data and ownership observations from 2008 to 2016 in the United States. Based on the cost asymmetry model, we found that the higher the state’s ownership, the more asymmetric cost behavior in terms of selling, general, and administrative and operating costs. However, firms with foreign state ownership shows less asymmetric cost behavior comparing to firms with domestic state ownership. This study is the first paper to analyze the effect of state ownership on cost behavior, classified into domestic and foreign, and the relationship between the state ownership and cost behavior from the viewpoint of the agency problem, budget maximization tendency, compensation of managers and insufficient monitoring. This study provides implications for policy makers to consider these characteristics of state ownership and origins of the differences between domestic and foreign state ownership, and supplements the structure to overcome the limitations.

하둡에서 데이터 접근 제어 설계 및 구현

김희주 ( Heeju Kim ),손시운 ( Siwoon Son ),길명선 ( Myeong-seon Gil ),문양세 ( Yang-sae Moon ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.1

최근 이슈가 되고 있는 하둡(hadoop) 패키지에 접목하여 많은 프로젝트들이 생겨나고 있으며,이들 중 주요하게 떠오르고 있는 분야가 접근 제어 기술이다. 특히,인터넷의 발전과 스마트 기기 사용자가 늘어남에 따라 데이터의 양이 증가하여,데이터의 소유자와 사용자의 필요에 의한 접근 제어 기술이 필요하게 되었다. 본 논문에서는 접근 제어 기술의 필요성을 기반으로 HDFS(Hadoop Distributed File System, 하둡 분산 파일 시스템) 기반의 새로운 데이터 접근 제어 프레임워크를 제안 한다. 제안하는 방법은 새로운 메타데이터 저장 모듈과 접근 관리 모듈을 만들어 데이터 접근 제어 프레임워크를 구성함으로써,빅데이터 플랫폼을 사용하는 사용자들을 위한 접근 제어 기능을 제공 한다. 제안한 프레임워크는 기존 플랫품에 추가적인 설치가 필요 없도록 하둡 내부에 설계하여 향후 활용도가 높을 것이라 기대된다.

대학교 전공 계열별 교수자들의 학습 평가 목적에 대한 인식과 수업 유형에 따른 평가 방법 활용 현황

손연아 ( Son Yeon-a ),윤지현 ( Yoon Jihyun ),맹희주 ( Maeng Heeju ) 인하대학교 교육연구소 2018 교육문화연구 Vol.24 No.3

교수자들의 수업의 질적 관리를 위해 평가는 매우 중요하다. 이에 본 연구에서는 대학생들의 학습 평가에 대한 전공 계열별 교수자들의 인식과 수업 유형에 따른 평가 방법의 적용 현황을 알아보았다. 이를 위하여 경기도에 소재한 1개의 사립 종합대학의 교원들을 대상으로 전수 조사를 실시하였으며, 연구 결과에 따른 결론은 다음과 같다. 첫째, 교육관련 전공 교수들이 많이 분포하고 있는 인문계열 교수자들의 학습 평가 목적에 대한 인식은 가장 높았으며 공학계열 교수자들의 학습 평가 목적에 대한 인식은 통계적으로 유의미하게 가장 낮은 것으로 나타났다. 특히 평가목적 중 평가 결과의 진로 지도 활용에 대한 인식은 모든 전공계열에서 가장 낮았다. 둘째, 예체능계열은 실기를 가장 많이 활용하고, 그 외 모든 계열에서 강의식 수업을 가장 많이 활용하고 있지만 전공 특성에 따라 다양한 수업방법을 함께 적용하고 있는 것으로 나타났다. 셋째, 평가자 유형에 따른 평가 방법 중 교수자 평가를 가장 많이 수행하고 있었으며, 수업에 따른 평가 방법으로 강의식 수업과 플립드 러닝 수업에는 지필평가, 실기 수업에는 실기평가, 실습과 토론 수업에서는 발표평가를 가장 많이 사용하고 있는 것으로 분석되었다. 넷째, 객관성 담보에 대한 어려움 때문에 동료 평가나 자기 평가를 가장 어려워했으며, 평가 기준 설정의 어려움과 학생 수 과다로 인한 평가시간과 채점 시간의 많은 소요 때문에 과제물평가와 발표 평가, 지필 평가, 실기 평가를 어려워했다. 따라서 교수자들이 효과적으로 평가를 수행할 수 있도록 평가 결과 활용에 대한 교수자들의 인식 강화 전략과 전공별 교수자용 평가 가이드 및 수업 유형별 평가 방법의 매뉴얼 등이 제공되어야 할 것이다. Evaluation is very important for the quality management of Instructor’s teaching. In this study, we investigated instructors’ perceptions about the purpose of undergraduate students’ learning evaluation by the university major field and the current status of evaluation method utilization according to instructional types. For this purpose, we conducted a complete enumeration on the professors of one private university in Gyeonggi-do. The conclusions according to the results are as follows. First, as a result of the instructors’ perception about the purpose of the learning evaluation, the instructors’ perceptions in humanities who have many professors of education major was the highest and the perception of engineering instructors was the lowest statistically significant. Particularly, the perception of the use of career guidance in evaluation results in all major was the lowest among evaluation purposes. Second, instructors used the practical skills classes often in the arts and physical education and the other major's instructors used the lecture-centered classes often. In addition, various teaching methods were applied according to the major characteristics. Third, instructor-centered evaluation among the evaluation methods depending on the evaluator was performed often and paper-based evaluation to lecture-centered class and flipped learning class, practical skills evaluation to practical skills class, and presentation evaluation to practice class and discussion class was performed often as an evaluation method according to instructional types. Fourth, because of the difficulty of securing objectivity, peer evaluation and self-evaluation were the most difficult. And because of the difficulty of setting evaluation standard, and time- consuming evaluation and grading due to the large number of students, it made it difficult to evaluate the homework assignment, the presentation evaluation, the paper evaluation, and the practical evaluation. Therefore, in order to enable the instructors to perform the evaluation effectively, it is necessary to provide a strategy of enhancing the instructors’ perceptions about the use of the evaluation results, a manual of evaluation guides for instructors of each major field, and a manual of evaluation methods by Instructional Types.

Effects of Li doping on the structural and electrical properties of solution-processed ZnO films for high-performance thin-film transistors

Bang, Kyuhyun,Son, Gi-Cheol,Son, Myungwoo,Jun, Ji-Hyun,An, Heeju,Baik, Kwang Hyeon,Myoung, Jae-Min,Ham, Moon-Ho ELSEVIER SCIENCE 2018 JOURNAL OF ALLOYS AND COMPOUNDS Vol.739 No.-

<P><B>Abstract</B></P> <P>We report the structural and electrical properties of Li-doped ZnO (LZO) films, which are spin-coated via a simple solution process using Zn and Li precursor solutions. The Li doping improves the crystallinity of the ZnO films, and the LZO films exhibit a relatively dense and smooth surface morphology compared to that of the undoped ZnO films. Back-gated LZO thin-film transistors (TFTs) are fabricated onto a heavily <I>p</I>-doped Si substrate with a SiO<SUB>2</SUB> gate dielectric, and operated in enhancement mode. In the case of the LZO TFT with a Li doping concentration of 0.50 mol%, the highest field-effect mobility of 5.18 cm<SUP>2</SUP> V<SUP>−1</SUP> s<SUP>−1</SUP> is obtained; the on/off current ratio and subthreshold swing are 10<SUP>7</SUP> and 1.2 V dec<SUP>−1</SUP>, respectively. These results demonstrate that Li doping can effectively modulate the structural and electrical properties of ZnO-based films, facilitating the fabrication of LZO TFTs with enhanced performance.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Li-doped ZnO thin-film transistors were fabricated via a solution process. </LI> <LI> The Li doping improved the morphological properties of the ZnO films. </LI> <LI> The Li doping improved the performance of the ZnO thin-film transistors. </LI> <LI> The highest mobility was obtained at a Li concentration of 0.50 mol% in ZnO. </LI> </UL> </P>

Iron Ion-Releasing Polypeptide Thermogel for Neuronal Differentiation of Mesenchymal Stem Cells

Patel, Madhumita,Lee, Hyun Jung,Son, Seungyi,Kim, Heeju,Kim, Jinheung,Jeong, Byeongmoon American Chemical Society 2020 Biomacromolecules Vol.21 No.1

<P>A poly(ethylene glycol)-based thermogel can capture an iron ion (Fe<SUP>3+</SUP>) through a crown ether-like coordination bond between the oxygen atom and metal ions, thus, providing a sustained Fe<SUP>3+</SUP>-releasing system. Poly(ethylene glycol)-<SMALL>L</SMALL>-poly(alanine) thermogel was used in this study. The polypeptide forms a rather robust gel, and the degradation products are a neutral amino acid, which provides cyto-compatible neutral pH environments during the cell culture. During the heat-induced sol-to-gel transition at 37 °C, tonsil-derived mesenchymal stem cells (TMSCs) and iron ions were incorporated, leading to the formation of a three-dimensional matrix toward neuronal differentiation of the incorporated TMSCs. The initial concentration of the iron ions was varied between 0, 15, 30, and 60 mM. About 10% of the loaded iron ions was released over 21 days, which continuously supplied iron ions to the cells. The incorporation of iron ions not only increased the gel modulus at 37 °C from 107 to 680 Pa, but also promoted cell aggregation with a significant secretion of the cell adhesion signal of FAK. Expression of biomarkers related to the neuronal differentiation of TMSCs, including NFM, MAP2, GFAP, NURR1, NSE, and TUBB3, increased 4-35-fold at the mRNA level in the Fe<SUP>3+</SUP>-containing system compared to that of the system without Fe<SUP>3+</SUP>. Immunofluorescence studies also confirmed pronounced cell aggregation and a significant increase in neuronal biomarkers at the protein level. This study suggests that an iron ion-releasing thermogelling system can be a promising injectable scaffold toward neuronal differentiation of stem cells.</P> [FIG OMISSION]</BR>

ESD 적용 경험에 따른 환경교육 강사들의 ESD 가치에 대한인식과 친환경 행동 및 PCK 차이 분석

최재혁(JaeHyeok Choi),손연아(Yeon-A Son),오현정(HyunJeong Oh),맹희주(HeeJu Maeng) 학습자중심교과교육학회 2024 학습자중심교과교육연구 Vol.24 No.9

Comparison of oncologic outcome between open versus laparoscopic distal pancreatectomy in patients with pancreatic ductal adenocarcinoma: Analysis with 1,202 patients in national database

Hongbeom KIM,Jae-Seung KANG,Heeju SON,Youngmin HAN,Wooil KWON,Jin-Young JANG 한국간담췌외과학회 2021 Annals of hepato-biliary-pancreatic surgery Vol.25 No.-

The risk factors influencing severe pancreatic exocrine insufficiency measured by stool elastase after pancreatoduodenectomy

Ara CHO,Jae-Seung KANG,Heeju SON,Youngmin HAN,Wooil KWON,Jin-Young JANG,Hongbeom KIM 한국간담췌외과학회 2021 Annals of hepato-biliary-pancreatic surgery Vol.25 No.-

Metabolic profiling analyses in liver and kidney of aging rats by tandem-mass spectrometry

Byeongchan Choi,Moongi Ji,Songjin Oh,Subin Choi,Bijin Park,Heeju Son,Suyeon Lee,Hae Young Chung,Man-Jeong Paik 한국분석과학회 2023 학술대회논문집 Vol.2023 No.11