개인의 사회적 자기효능감과 팀원 간 관계 갈등 인식 및 팀 갈등관리 전략의 효과에 관한 연구

박지혜 ( Park¸ Jihye ) 한국협상학회 2020 협상연구 Vol.23 No.1

본 연구는 개인 수준에서 개인이 가지고 있는 사회적 자기효능감이 개인의 관계 갈등 인식에 어떠한 영향을 주는지 살펴보고자 하였다. 또한 그 과정에서 팀이 사용하는 갈등관리 전략의 종류에 따라 사회적 자기효능감과 관계 갈등 인식의 변화 양상을 고찰해보고자 하였다. 17개 팀, 72명의 자료를 바탕으로 분석한 결과, 사회적 자기효능감과 관계 갈등 인식(빈도, 강도)은 통계적으로 유의한 관련성이 나타나지 않았지만, 팀의 갈등관리 전략은 부분적인 조절효과가 나타났고, 팀의 갈등관리 전략의 효과는 사회적 자기효능감이 낮은 사람들에게 더 뚜렷하게 나타났다는 점은 이론적 예측과 일관된 결과였다. 팀 갈등관리 유형과 관련하여 사회적 자기효능감과 관계적 측면의 갈등 인식의 관계를 다룬 초기 연구로서, 본 결과를 토대로 하여 이론적, 실무적 시사점 및 연구의 한계점을 논의하고 향후 연구 방향을 제시하였다. This research investigates the relationship between the individual’s social self-efficacy and the perception of relationship conflict (e.g., frequency, intensity) in the individual level. Moreover, the team’s conflict management strategy is considered as a group-level moderator of the social self-efficacy and relationship conflict perception link. Using HLM (hierarchical linear model) analysis with 72 participants in 17 teams, there are interaction effects of dominating strategy and avoiding strategy on the relationship between social self-efficacy and relationship conflict perception although the main effects are not statistically significant. As expected, when the level of conflict management strategy (e.g., dominating or avoiding) is high, the relationship conflict perception level is not different in accordance with the level of individual’s social self-efficacy. However, when the level of conflict management strategy (e.g., dominating or avoiding) is low, the relationship between the social self-efficacy and the relationship conflict perception amplifies. Theoretical and practical implications, limitations, and future research are discussed.

Folic Acid-Polyethyleneimine Functionalized Mesoporous Silica Nanoparticles as a Controlled Release Nanocarrier

Park, Jihye,Park, Sung Soo,Jo, Nam-Ju,Ha, Chang-Sik American Scientific Publishers 2019 Journal of Nanoscience and Nanotechnology Vol.19 No.10

The Effects of Physical Activity and Body Fat Mass on Colorectal Polyp Recurrence in Patients with Previous Colorectal Cancer

Park, Jihye,Kim, Jae Hyun,Lee, Hyun Jung,Park, Soo Jung,Hong, Sung Pil,Cheon, Jae Hee,Kim, Won Ho,Park, Ji Soo,Jeon, Justin Y.,Kim, Tae Il American Association for Cancer Research 2017 CANCER PREVENTION RESEARCH Vol.10 No.8

<P>We aimed to identify the effects of physical activity and body composition on colorectal polyp recurrence in patients with previous colorectal cancer. A total of 300 patients were selected randomly from the colorectal cancer survivor cohort of Severance Hospital (Seoul, Korea). Patients reported various recreational physical activities and received surveillance colonoscopy. Body composition was measured with a body composition analyzer. We compared patients who exercised for at least 1 hour/week (active) with those who exercised less frequently or not at all (sedentary). The active exercise group (n = 203) had a lower recurrence of advanced adenoma than the sedentary group (n = 97; 6.4% vs. 14.4%, P = 0.023). The prevalence of advanced adenoma recurrence decreased in an exercise dose-dependent manner (Ptrend = 0.019). In multivariate logistic analysis, the independent factors associated with advanced polyp recurrence were body fat mass [OR, 7.601; 95% confidence interval (CI), 1.583-36.485; P = 0.011] and active exercise (OR, 0.340; 95% CI, 0.143-0.809; P = 0.015). In Cox proportional hazards models, body fat mass (HR, 5.315; 95% CI, 1.173-24.083; P = 0.030) and active exercise (HR, 0.367; 95% CI, 0.162-0.833; P = 0.017) were the independent factors associated with cumulative advanced adenoma recurrence. In conclusion, exercising for at least 1 hour/week and low body fat mass were found to be related to lower rates of colorectal polyp recurrence in the surveillance of colorectal cancer survivors. (C) 2017 AACR.</P>

Low Temperature Thermochromic Polydiacetylenes: Design, Colorimetric Properties, and Nanofiber Formation

Park, In Sung,Park, Hye Jin,Jeong, Woomin,Nam, Jihye,Kang, Youngjong,Shin, Kayeong,Chung, Hoeil,Kim, Jong-Man American Chemical Society 2016 Macromolecules Vol.49 No.4

<P>Owing to their stimulus responsive color changing properties, polydiacetylenes (PDAs) have been extensively investigated as colorimetric sensors. Thermochromic properties of PDAs have been the central focus of a number of investigations that were aimed not only at gaining a fundamental understanding of the physical basis of the color change but also at developing practical applications as temperature sensors. The thermochromic transition temperature of a PDA polymer is closely related to the melting point of the corresponding diacetylene (DA) monomer. In addition, the majority of PDAs described to date undergo a blue-to-red color change above room temperature because PDAs are generally derived from DA monomers that have melting points above room temperature. In the current study, we developed a series of low temperature colorimetric PDAs that were designed based on the reasoning that removal of the sources for strong headgroup interactions would lower the melting points of the corresponding DA monomers. This strategy was used to design and fabrication of PDA sensors that display color transitions in the range of 5-30 degrees C. Moreover, the thermochromic transition temperatures of the PDAs were found to decrease by ca. 10 degrees C when the alkyl chain length in the DA monomer is truncated by two methylene units. The results of FTIR and Raman spectroscopic analyses suggest that the PDA alkyl chain adopts an all-trans conformation in the blue-phase and some gauche forms exist in the alkyl chain in the red-phase FDA. Finally, the new PDAs are stable up to 300 degrees C, and their processable nature enables them to be fabricated in nanofiber forms by employing an anodized aluminum oxide (AAO) membrane as a template.</P>

가상현실(VR)에서 품질기능전개(QFD)를 활용한 요구사항 분석

Jihye Park,김민철 한국유통과학회 2019 유통과학연구 Vol.17 No.2

Purpose - The purpose of this study is to analyze the user requirements and developer requirements in virtual reality(VR), and suggest ways to increase the satisfaction of users who experience virtual reality. Specifically, focused on experience store of VR as a distribution retailer, user requirements were analyzed according to the results of previous research that the characteristics of Affordance, Presence, and Head Mounted Display (HMD) affect user satisfaction. Research, design, data, and methodology - Based on previous studies, in this study, we analyzed the importance of immerse, interaction, perception, and presence for the satisfaction of the user through the questionnaire, and the user experiences virtual reality (VR) The importance of HMD, Presence, Affordance, and experience satisfaction were analyzed. Based on this, we analyzed the user requirements and the developer requirements based on the questionnaires and interviews of the experts, starting from the user 's desire or preference using QFD technique. Results - As a result of the analysis, the development factors that occupied a big part in the virtual reality field appeared to be visual. In detail, this showed that there was a lack of sense of presence for users. This should be improved. This paper shows that the requirements for visual, auditory, and tactile development are necessary. For the satisfaction of the users of virtual reality (VR) users, it is necessary to develop them according to their priority in consideration of importance and difficulty in the future. Conclusions - In this study, it was suggested that development according to priority should be considered, considering the difficulty level. Based on the results of this study, the following suggestions are made. First, we tried to search the list of user requirements as much as possible, but it is likely to change due to the development of VR technology. Therefore, it is necessary for developers to continually supplement user requirements with recent research literature. Second, development priorities according to difficulty level should be considered. This aspect should be considered in the actual VR development process, so if the numerical value of the difficulty is calculated, it should be presented in the research.

Thermal and Magnetic Properties of Fe-Co-B-P-Cu Amorphous Alloy System

Jihye Park,Jiyoon Lim,Hyunsol Son,Haein Choi-Yim 한국자기학회 2021 한국자기학회 학술연구발표회 논문개요집 Vol.31 No.2

Over the past decades, Fe-based amorphous alloy systems have been spotlighted with remarkable soft magnetic properties such as high saturation magnetization (Ms), low coercivity (Hc), and good permeability. These advantageous properties provide a platform for essential components of commercial products. In this study, we improved saturation magnetization and high-temperature magnetic properties by adding Cobalt at the expense of Fe. As a model system, Fe-Co-B-P-Cu amorphous ribbons fabricated by the melt-spinning method were employed. We measured the thermal properties of the alloy by using differential scanning calorimetry (DSC), including crystallization temperature. Structural characteristics of ribbons examined by X-ray diffraction (XRD) turned out to be a fully amorphous state. Magnetic properties such as Ms and Hc were inspected by vibrating sample magnetometer(VSM) and B-H loop tracer, respectively. The combination of excellent soft magnetic properties and thermal ability makes the FeCoBPCu alloys promising soft magnetic materials for industrial applications.

Disparate Downstream Reactions Mediated by an Ionically Controlled Supramolecular Tristate Switch

Park, Jung Su,Park, Jihye,Yang, Yun Jae,Tran, Trang Thu,Kim, In Su,Sessler, Jonathan L. ACS AMERICAN CHEMICAL SOCIETY 2018 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.140 No.24

AMIGO2, a novel membrane anchor of PDK1, controls cell survival and angiogenesis via Akt activation

Park, Hyojin,Lee, Sungwoon,Shrestha, Pravesh,Kim, Jihye,Park, Jeong Ae,Ko, Yeongrim,Ban, Young Ho,Park, Dae-Young,Ha, Sang-Jun,Koh, Gou Young,Hong, Victor Sukbong,Mochizuki, Naoki,Kim, Young-Myeong,Le The Rockefeller University Press 2015 The Journal of cell biology Vol.211 No.3

<▼1><P>AMIGO2 is a novel scaffold protein that regulates PDK1 membrane localization and Akt activation in endothelial cells, and inhibition of the interaction between PDK1–AMIGO2 results in impaired neovascularization, pathological angiogenesis, and tumor angiogenesis.</P></▼1><▼2><P>The phosphoinositide 3-kinase–Akt signaling pathway is essential to many biological processes, including cell proliferation, survival, metabolism, and angiogenesis, under pathophysiological conditions. Although 3-phosphoinositide–dependent kinase 1 (PDK1) is a primary activator of Akt at the plasma membrane, the optimal activation mechanism remains unclear. We report that adhesion molecule with IgG-like domain 2 (AMIGO2) is a novel scaffold protein that regulates PDK1 membrane localization and Akt activation. Loss of AMIGO2 in endothelial cells (ECs) led to apoptosis and inhibition of angiogenesis with Akt inactivation. Amino acid residues 465–474 in AMIGO2 directly bind to the PDK1 pleckstrin homology domain. A synthetic peptide containing the AMIGO2 465–474 residues abrogated the AMIGO2–PDK1 interaction and Akt activation. Moreover, it effectively suppressed pathological angiogenesis in murine tumor and oxygen-induced retinopathy models. These results demonstrate that AMIGO2 is an important regulator of the PDK1–Akt pathway in ECs and suggest that interference of the PDK1–AMIGO2 interaction might be a novel pharmaceutical target for designing an Akt pathway inhibitor.</P></▼2>

Evaluating the effects of organic matter bioavailability on nanofiltration membrane using real-time monitoring

Park, Sanghun,You, Jeongyeop,Ahn, Yujin,Jung, Woonggyu,Kim, Jihye,Lee, Sungyun,Park, Jongkwan,Cho, Kyung Hwa Elsevier 2018 Journal of membrane science Vol.548 No.-

<P><B>Abstract</B></P> <P>We studied the influence of bioavailability of organic matter on membrane fouling layer development by comparing the filtration performance of two feed waters (wetland water and graywater). Dissolved organic carbon (DOC) concentration, size exclusion chromatography (SEC), and fluorescence excitation-emission matrix (FEEM) were used to characterize the bioavailability of organic matter in these water samples during the nanofiltration process. The wetland sample contained a high proportion of humic acid- and fulvic acid-like matter with low bioavailability, whereas the graywater sample comprised substantial amounts of aromatic proteins and microbial byproduct-like matter with high bioavailability. In addition, the molecular size distribution revealed that the wetland sample contained a large portion of recalcitrant organic matter, whereas the graywater sample contained easily bioavailable organic matter. After the filtration experiment, the DOC of the wetland sample decreased to 4.8mgC/L, whereas the graywater sample resulted in a lower DOC concentration of 3.4mgC/L. Optical coherence tomography (OCT) illustrated real-time variations in the fouling layer morphology, providing both 2D and 3D images. In addition, confocal laser scanning microscopy (CLSM) quantified the bacterial volume in the fouling layer. The wetland sample yielded a bacterial volume of 11.8µm<SUP>3</SUP>/μm<SUP>2</SUP> from a total fouling volume of 103µm<SUP>3</SUP>/μm<SUP>2</SUP>, whereas the graywater sample yielded a bacterial volume of 53.2µm<SUP>3</SUP>/μm<SUP>2</SUP> from a total fouling layer volume of 134µm<SUP>3</SUP>/μm<SUP>2</SUP>. Fitting of the two-phase Monod model to the fouling layer growth on the membrane resulted in lower-yield coefficients (i.e., the volumes produced per unit amount of substrate, <SUB> Y xs </SUB> ) of 7.46 and 27.95µm<SUP>3</SUP>/μm<SUP>2</SUP> in wetland water and higher-yield coefficients of 13.17 and 47.53µm<SUP>3</SUP>/μm<SUP>2</SUP> in the graywater at first and second phase, respectively. This study addresses the quantitative evaluation of the organic matter bioavailability in terms of membrane fouling using OCT images and a two-phase Monod model.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The difference of bioavailability of DOM influenced the amount of fouling layer growth. </LI> <LI> In situ OCT monitoring provided 2D and 3D morphology of the fouling layer and quantified the volume. </LI> <LI> Two-phase Monod model evaluated the influence of bioavailability of DOM on fouling layer growth. </LI> </UL> </P>

Photo-induced hybrid nanopatterning of titanium dioxide <i>via</i> direct imprint lithography

Park, Hyeong-Ho,Choi, Dae-Geun,Zhang, Xin,Jeon, Sohee,Park, Seong-Je,Lee, Soon-Won,Kim, Sarah,Kim, Ki-don,Choi, Jun-Hyuk,Lee, Jihye,Yun, Dae Keun,Lee, Ki Joong,Park, Hyung-Ho,Hill, Ross Henry,Jeong, J Royal Society of Chemistry 2010 Journal of materials chemistry Vol.20 No.10

<P>A novel ultraviolet (UV)-assisted imprinting procedure that employs photosensitive titanium(<SMALL>IV</SMALL>) di-n-butoxide bis(2-ethylhexanoate) is presented for the fabrication of well-ordered titanium dioxide (TiO<SUB>2</SUB>) nanostructures at room temperature. The main novelty of this technique is the use of the photosensitive titanium organic compound, rather than a commonly used UV-curable resin, for direct UV-assisted nanoimprint lithography. Fourier transform infrared and X-ray photoelectron spectroscopy studies suggest that exposure to UV light resulted in the gradual removal of organic groups from films prepared from titanium(<SMALL>IV</SMALL>) di-n-butoxide bis(2-ethylhexanoate) photochemically and successively converted the films to TiO<SUB>2</SUB> at room temperature. This approach allows direct fabrication of TiO<SUB>2</SUB> nanopatterns with lines down to 35 nm in width, hole arrays of 265 nm in diameter, and three-dimensional TiO<SUB>2</SUB> hybrid micro/nano-patterns without observable defects for use in applications where ordered surface nanostructures are required, such as photovoltaics, photonics, and optical waveguides.</P> <P>Graphic Abstract</P><P>A novel UV-assisted imprinting procedure that employs photosensitive Ti(<SMALL>IV</SMALL>) di-n-butoxide bis(2-ethylhexanoate) is presented for the fabrication of well-ordered TiO<SUB>2</SUB> and 3-D TiO<SUB>2</SUB> hybrid micro/nano-patterns at room temperature. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b921343k'> </P>