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어머니의 정서표현양가성이 유아의 문제행동에 미치는 영향 : 아버지의 양육참여에 따른 매개효과
정호영 ( Jung¸ Hoyoung ),최은실 ( Choi¸ Eunsil ) 열린부모교육학회 2020 열린부모교육연구 Vol.12 No.4
본 연구는 어머니의 정서표현양가성이 아버지의 양육참여와 유아의 문제행동과 맺는 관련성을 확인하기 위한 것이다. 이를 위해 만3-5세 유아를 양육하고 있는 어머니를 대상으로 정서표현양가성(AEQ), 아버지양육참여, 문제행동(CBCL1.5-5)을 측정하였다. 연구결과, 어머니의 정서표현양가성은 아버지양육참여, 유아의 문제행동과 높은 관련성이 있는 것으로 나타났다. 즉, 어머니의 정서표현양가성과 아버지양육참여는 부적상관을 보였고, 유아의 문제행동과는 정적상관을 보였다. 반면 아버지양육참여와 유아의 문제행동과는 부적상관을 보였다. 매개효과 검증에서는 아버지양육참여가 부분 매개함을 확인하였다. 이는 어머니의 정서표현양가성이 높을수록 아버지양육참여가 낮고 모든 문제행동(외현화, 내재화, 수면문제, 기타문제)이 높게 나타나는 것을 의미한다. 본 연구 결과를 통해 어머니의 정서표현양가성이 모-자녀관계 뿐만 아니라 공동양육의 책임이 있는 배우자와의 관계에도 영향을 미치고 있는 중요한 변인임을 확인할 수 있었고, 어머니의 정서표현양가성이 아버지양육참여를 매개로하여 유아의 문제행동에 직·간접적영향을 미치고 있음을 확인할 수 있었다. This study aims at figuring out how the mother’s ambivalence over emotional is affecting the fathers’ participation in child-rearing and young children's behavioral problems. To test a set of hypothesized relationships, a survey was conducted on mothers who raised their young children aged 3-5. The survey instruments include ambivalence over emotional(AEQ), fathers’ participation in child-rearing, young children’s Behavior Checklist(CBCL 1.5-5). According to the results of survey, mother’s ambivalence over emotional has great relations with fathers’ participation in child-rearing and young children’s behavior problems. In other words, mother’s ambivalence over emotional is negatively associated with fathers’ participation in child-rearing and positively associated with young children’s behavior problems. But, fathers’ participation in child-rearing is negatively associated with young children’s behavior problems. It showed father's involvement in child-rearing has a partial mediating effect. It means that the higher mother’s ambivalence over emotional is, the lower father's involvement in child-rearing is and the more behavioral problems(externalizing and internalizing, sleep, other behavior problems) appear. Based on the results of this study, it confirmed that mother’s ambivalence over emotional had an influence on not only relationships between mother and their young children but also relationships between partners having custody of their young children. Also, it confirmed that mother’s ambivalence over emotional mediated by father's involvement in child-rearing had an influence both directly and indirectly on young children’s behavioral problems.
Hoyoung Lee,Jun-Hyuk Choi,Kinam Jung,Hanyi Lim,Dae-Geun Choi,Joo-Yun Jung,Jun-Ho Jeong,Tae Woo Kim,Jong Hyeok Park,Jihye Lee 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.125 No.-
Photoelectrochemical (PEC) water splitting is a promising and sustainable route for the environmentallyfriendly production of hydrogen. Although the heterojunction of tungsten trioxide (WO3) and bismuthvanadate (BiVO4) has been recognized as a promising photoanode material, it still faces challenges, includinginadequate photocurrent density and limited nanostructure fabrication areas. In this study, wepresent an innovative approach for fabricating periodically-ordered 1D WO3 nanorods using nanoimprintlithography and hydrothermal synthesis, followed by BiVO4 deposition. The resulting periodicallyordered1D BiVO4/WO3 nanorods distinctly outperform randomly grown nanorods and planar films inboth small-scale (2 2.5 cm2) and large-scale (6 6 cm2) photoanodes, attributed to improved light absorptionand facilitated charge transfer. To further enhance PEC performance, the 1D BiVO4/WO3 nanorodswere decorated with gold nanoparticles (AuNPs), leading to an additional performance boost due tothe plasmonic effect.
Antidiabetic effect of gomisin N via activation of AMP-activated protein kinase
Jung, Dae Young,Kim, Ji-Hyun,Lee, Hoyoung,Jung, Myeong Ho Elsevier 2017 Biochemical and biophysical research communication Vol. No.
<P><B>Abstract</B></P> <P>Gomisin N (GN) is a lignan derived from <I>Schisandra chinensis</I>. AMP-activated kinase (AMPK) has gained attention as a therapeutic target for the treatment of metabolic syndrome. Previously, we reported that GN activated the AMPK pathway and ameliorated high-fat diet (HFD)-induced hepatic steatosis. In this study, we investigated the anti-diabetic effects of GN in C2C12 myotubes and HFD obese mice. GN enhanced the phosphorylation of AMPK/acetyl-CoA carboxylase (ACC) and Akt. In addition, GN promoted glucose uptake in C2C12 myotubes, which was accompanied by the translocation of glucose transporter 4 (GLUT4) to the plasma membrane. Treatment with compound C, an AMPK inhibitor, suppressed GN-mediated stimulation of glucose uptake. Furthermore, GN increased the expression of mitochondria biogenesis and fatty acid oxidation genes in C2C12 myotubes. In the <I>in vivo</I> study, administration of GN to HFD mice decreased the levels of fasting blood glucose and insulin, and improved glucose tolerance in HFD obese mice. GN administration rescued the decreased phosphorylation of AMPK and Akt and stimulated the expression of mitochondria biogenesis genes in the skeletal muscle of HFD mice. These findings suggested that GN exerted anti-hyperglycemic effects through AMPK activation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Gomisin N activated AMPK/Akt signaling in C2C12 myotubes. </LI> <LI> Gomisin N stimulated glucose uptake in C2C12 myotubes. </LI> <LI> Gomisin N promoted mitochondria biogenesis and fatty acid oxidation in C2C12 myotubes. </LI> <LI> Gomisin N reduced hyperglycemia and improved glucose tolerance in HFD obese mice. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
정호영(Hoyoung Jung),김희철(Hee-Chul Kim),박정흠(Jung-Heum Park) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.2Ⅰ
본 논문에서는 재귀원형군 G(2^m, 2^k)에서 노드에 고장이 났을 경우 임의의 두 노드사이의 고장이 없는 최단경로의 길이를 분석한다. m > k+1인 G(2^m, 2^k)에서 m = nk+r이라 하자. 여기서 n ≥ 1이고, 1≤ r≤ k이다. m > k+1인 G(2^m, 2^k)에서 임의의 연결도-1 개 이하의 노드에 고장이 있을 경우, 모든 두 노드 사이의 고장이 없는 가장 짧은 경로들의 길이의 최대값, 즉 G(2^m, 2^k)의 고장지름은, n이 짝수이면 dia_(m,k)+2 이하이고, n이 홀수이면 dia_(m,k)+3 이하이다. 여기서 dia_(m,k)는 G(2^m, 2^k)의 지름이다.
정호영(Hoyoung Jung),박성민(Sungmin Park),강수용(Sooyong Kang),차재혁(Jaehyuk Cha) 한국정보과학회 2009 정보과학회 컴퓨팅의 실제 논문지 Vol.15 No.12
최근 저장장치로 하드 디스크를 대치하고 있는 플래시 메모리 저장장치는 물리적 특성이 하드디스크와 다르다. 이러한 플래시 메모리 저장장치의 성능을 향상시키기 위해 운영체제 및 파일시스템의 여러 계층에 걸쳐 다양한 연구가 진행되고 있다. 본 연구에서는 파일 삭제시 무효화되는 페이지 정보를 상위 계층에서 전달받아 이를 저장하고 활용하는 플래시 메모리 저장장치의 구조를 제안하고 해당 시스템의 성능 및 영향에 대해 연구하였다. 제안하는 시스템은 페이지 무효 정보를 블록 병합, 웨어 레벨링 등에 활용하고 이에 따라 시스템의 성능을 효과적으로 향상시키는 것으로 나타났다. Flash memory, which replaces hard disk recently, has different physical characteristics with hard disk. For the performance of flash memory based storage system, many researches over OS and file system layers has been doing. In this paper, we propose the architecture of flash memory based storage which uses information of page invalidation when file deletion occurs from upper layer. Also, we evaluate the performance of proposed system. Proposed system effectively increases IO performance by using page invalidation information to block merge and wear leveling algorithms.
플래시 SSD의 내구성을 검증하기 위한 FTL 오프라인 알고리즘
정호영(Hoyoung Jung),이태화(Taehwa Lee),차재혁(Jaehyuk Cha) 한국디지털콘텐츠학회 2012 한국디지털콘텐츠학회논문지 Vol.13 No.1
SSDs(Solid State Drives) have many attractive features such as high performance, low power consumption, shock resistance, and low weight, so they replace HDDs to a certain extent. An SSD has FTL(Flash Translation Layer) which emulate block storage devices like HDDs. A garbage collection, one of major functions of FTL, effects highly on the performance and the lifetime of SSDs. However, there is no de facto standard for new garbage collection algorithms. To solve this problem, we propose trace driven offline optimal algorithms for garbage collection of FTL. The proposed algorithm always guarantees minimal number of erase operation. In addition, we verify our proposed algorithm using TPC trace.
정호영(Hoyoung Jung),강수용(Sooyong Kang),차재혁(Jaehyuk Cha) 한국디지털콘텐츠학회 2011 한국디지털콘텐츠학회논문지 Vol.12 No.2
Recently the Solid State Drive (SSD) is widely used for storage system of various mobile devices. In this case, existing buffer replacement algorithms based on the hard disk do not consider characteristics of flash memory, so it caused performance degradation of the system. This paper proposes a novel buffer replacement policy called ABM (Asymmetric Buffer Management) policy. ABM policy separates read and write buffer space and applies different replacement unit and replacement algorithm for each buffer. In addition, write buffer delay scheme and dynamic size adaptation algorithm is applied for better performance. ABM outperforms other replacement policies, especially ABM-LRU-CLC shows 32% better performance than normal LRU policy.