20대 성인의 페이스북 이용행태에 따른 사회비교 경향성, 우울,자아존중감

김지원,남궁빈,안해정,권햇살,한예슬,허진성,김고은,김수진,김미혜,이수인 이화여자대학교 간호과학대학 2015 이화간호학회지 Vol.- No.49

Purpose: The purpose of this study was to explore the differences among social comparison orientation, depression, and self-esteem by patterns of using Facebook among Facebook users’ in their 20s. Methods: The participants in this descriptive study were 332 Facebook users in their 20s. Data collection took place between August 21 and 27, 2014. Questionnaires were the Iowa–Netherlands Comparison Orientation Measure (revised), Center for Epidemiologic Studies Depression Scale, and Rosenberg Self-Esteem Scale. Data were statistically analyzed using t-tests and ANOVAs. Result: Each mean score of social comparison, depression, and self-esteem was 26.04±6.82, 31.39±8.99 and 38.05±6.19. Significant differences emerged between the degree of social comparison and the following Facebook usage variables: average single-connection time to Facebook (F=3.570, p=.007) and self-evaluation of Facebook usage behavior (F=6.203, p<.001). Conclusion: The results of this study suggested that Facebook users in their 20s who access Facebook for long periods and assess themselves as using it more often had a high score of comparison orientation. This result can be used in Nursing by developing the theoretical basis for education and campaign related to Facebook usage. In-depth studies are needed for research on the effect social comparison has on Facebook users and relationships between social comparison and emotions.

철강산업 용융로의 대기오염물질 배출계수 산정 연구

석광설,방선애,홍지형,이석조,김대곤,이대균,허정숙,이은정 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.4

The purpose of this study is 10 estimate of emission factors of the air pollutants for the melting furnaces for the iron and steel industry. The result of this study is able to obtain the emission factor of particulate matters (PM), sulfur dioxide, nitrogen oxides for melting furnace. The emission factors of each pollutants were as follows: - the emission factor varied between 6.13E-03 ∼ 6.12E-01kg/ton for PM - 1.59E-01 ∼ 2.45E+00kg/ton for S0₂ - 6.82E-02 ∼ 6.88E-01kg/ton for NOx, respectively. Analysis of the differences in the emission factors of ours and U.S. EPA's yielded the following results for the Wilcoxon method: p>0.05. The statistical analysis showed no differences in the our emission factors and U.S. EPA's

Wound healing potential of antibacterial microneedles loaded with green tea extracts

Park, S.Y.,Lee, H.U.,Lee, Y.C.,Kim, G.H.,Park, E.C.,Han, S.H.,Lee, J.G.,Choi, S.,Heo, N.S.,Kim, D.L.,Huh, Y.S.,Lee, J. Elsevier 2014 Materials Science and Engineering C Vol.42 No.-

This study evaluates the utility of an antibacterial microneedle composed of green tea (GT) extract and hyaluronic acid (HA), for the efficient delivery of GT. These microneedles have the potential to be a patient-friendly method for the conventional sustained release of drugs. In this study, a fabrication method using a mold-based technique to produce GT/HA microneedles with a maximum area of ~50mm<SUP>2</SUP> with antibacterial properties was used to manufacture transdermal drug delivery systems. Fourier transform infrared (FTIR) spectrometry was carried out to observe the potential modifications in the microneedles, when incorporated with GT. The degradation rate of GT in GT/HA microneedles was controlled simply by adjusting the HA composition. The effects of different ratios of GT in the HA microneedles were determined by measuring the release properties. In HA microneedles loaded with 70% GT (GT70), a continuous higher release rate was sustained for 72h. The in vitro cytotoxicity assays demonstrated that GT/HA microneedles were not generally cytotoxic to Chinese hamster ovary cells (CHO-K1), human embryonic kidney cells (293T), and mouse muscle cells (C2C12), which were treated for 12 and 24h. Antimicrobial activity of the GT/HA microneedles was demonstrated by ~95% growth reduction of gram negative [Escherichia coli (E. coli), Pseudomonas putida (P. putida), and Salmonella typhimurium (S. typhimurium)] and gram positive bacteria [Staphylococcus aureus (S. Aureus) and Bacillus subtilis (B. subtilis)], with GT70. Furthermore, GT/HA microneedles reduced bacterial growth of infected wound sites in the skin and improved wound healing process of skin in rat model.

차량 동역학 해석 프로그램 AutoDyn7을 이용한 차량 주행 시뮬레이션 및 시험 평가

허승진(S.J.Heo),탁태오(T.O.Tak),김상섭(S.S.Kim),유완석(W.S.Yoo) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2

A vehicle dynamic analysis program AutoDyn7 (Automobile Dynamics in G7) is developed during the G7 project with respect to "development of integrated software for the chassis system design and analysis"<br/> In this paper, computer simulations of the selected vehicle maneuver are performed using AutoDyn7 S/W. Simulation results are compared with the results of driving tests with experimental handling vehicle for validation and evaluation of the developed S/W AutoDyn7. It is expected that the vehicle dynamic analysis program AutoDyn7 is effectively applicable to design and analysis the chassis system in the early design stage of vehicle development.<br/>

Rational Design of Low Cost and High Energy Lithium Batteries through Tailored Fluorine-free Electrolyte and Nanostructured S/C Composite

Agostini, M.,Lim, D.-H.,Sadd, M.,Hwang, J.-Y.,Brutti, S.,Heo, J. W.,Ahn, J. H.,Sun, Y. K.,Matic, A. Wiley (John WileySons) 2018 ChemSusChem Vol.11 No.17

<P>We report a new Li-S cell concept based on an optimized F-free catholyte solution and a high loading nanostructured C/S composite cathode. The Li2S8 present in the electrolyte ensures both buffering against active material dissolution and Li+ conduction. The high S loading is obtained by confining elemental S (approximate to 80%) in the pores of a highly ordered mesopores carbon (CMK3). With this concept we demonstrate stabilization of a high energy density and excellent cycling performance over 500 cycles. This Li-S cell has a specific capacity that reaches over 1000 mA hg(-1), with an overall S loading of 3.6 mg cm(-2) and low electrolyte volume (i.e., 10 mu L cm(-2)), resulting in a practical energy density of 365 Wh kg(-1). The Li-S system proposed thus meets the requirements for large scale energy storage systems and is expected to be environmentally friendly and have lower cost compared with the commercial Li-ion battery thanks to the removal of both Co and F from the overall formulation.</P>

Lactococcus lactis BFE920 activates the innate immune system of olive flounder (Paralichthys olivaceus), resulting in protection against Streptococcus iniae infection and enhancing feed efficiency and weight gain in large-scale field studies

Kim, D.,Beck, B.R.,Heo, S.B.,Kim, J.,Kim, H.D.,Lee, S.M.,Kim, Y.,Oh, S.Y.,Lee, K.,Do, H.,Lee, K.,Holzapfel, W.H.,Song, S.K. Academic Press 2013 Fish & shellfish immunology Vol.35 No.5

The protective effect of a food-grade lactic acid bacterium Lactococcus lactis BFE920 against disease of olive flounder (Paralichthys olivaceus) cultivated on a large scale was studied. Initially, antimicrobial activity of L. lactis against several fish pathogens was evaluated in vitro; the probiotic showed strong antibacterial activity against Streptococcus iniae, Streptococcus parauberis and Enterococcus viikkiensis, and moderate activity against Lactococcus garviae. When olive flounders were fed for two weeks with experimental diets containing varying concentrations of L. lactis (1 x 10<SUP>6</SUP>, 5 x 10<SUP>6</SUP>, 2.5 x 10<SUP>7</SUP> and 1.25 x 10<SUP>8</SUP> CFU/g feed), all the experimental feed groups showed 68-77% survival upon challenge with S. iniae. A field-scale feeding trial with L. lactis dietary supplement was conducted in a local fish farm (n = 12,000) for three months, and disease resistance, innate immune parameters and growth performance were evaluated. The average weight gain and feed efficiency were increased up to 6.8% and 8.5%, respectively. At the end of the feeding trial, the olive flounders were challenged with S. iniae. The L. lactis-fed group was protected from S. iniae challenge with a 66% survival rate. This disease protection is due to the flounder's innate immunity activated by the L. lactis administration: increased lysosomal activities and production of IL-12 and IFN-γ. These data clearly indicated that L. lactis BFE920 may be developed as a functional feed additive for protection against diseases, and for enhancement of feed efficiency and weight gain in olive flounder farming.

간호대생들의 임상실습 스트레스, 학업적 자기효능감 및 진로정체감에 대한 연구

최유빈,최민지,이은형,이연우,우소연,하희주,허예지,박수현,허미래,이가현 이화여자대학교 간호과학대학 2015 이화간호학회지 Vol.- No.49

Purpose: The purpose of this study was to investigate clinical practice stress, academic self-efficacy, and career identity among undergraduate students in nursing practicum. Method: This study was a descriptive correlational design using the survey method. The study included 267 undergraduate students attending to 5 college in Seoul. The data was gathered from August 2014 to October 2014 and the data were analyzed using IBM SPSS statistics version 22.0 Program with descriptive statistics, t-test, analysis of variance with Scheffe test, and Pearson’s correlation coefficient. Results: Situational characteristics of Clinical Practice Stress(CPP) was significantly different with regards to task difficulties and efficacy self-confidence of academic self-efficacy(ASE) (r= .179, p= .003; r= .166, p= .006). Statistically significant positive relationship was founded between Personal characteristics of CPP and self-confidence of ASE (r= .239, p< .01). External regulators of CPP was significantly different according to self-confidence and task difficulties (r= .175, p= .003; r= .132, p= .028). The self-confidence and efficacy for self-confidence of ASE were a significantly correlated with Career Identity; The Career identity also was a significantly correlated with all sub-categories of CSS scale(r= -0.208, p< 0.01; r= -0.369, p< 0.01; r= -0.153, p< .011) Conclusion: This study showed positive statistical relationships associated with clinical practice stress, academic self-efficacy, and career identity as a preliminary evidence-based study for guiding education in nursing curriculum. Further research should be need for students’ future as a professional nurse.

Rice serine/threonine kinase 1 is required for the stimulation of OsNug2 GTPase activity

Heo, J.B.,Lee, Y.M.,Yun, H.R.,Im, C.H.,Lee, Y.S.,Yi, Y.B.,Kwon, C.,Lim, J.,Bahk, J.D. G. Fischer 2014 Journal of plant physiology Vol.171 No.17

Several GTPases are required for ribosome biogenesis and assembly. We recently identified rice (Oryza sativa) nuclear/nucleolar GTPase 2 (OsNug2), a YlqF/YawG family GTPase, as having a role in pre-60S ribosomal subunit maturation. To investigate the potential factors involved in regulating OsNug2 function, yeast two-hybrid screens were performed using OsNug2 as bait. Rice serine/threonine kinase 1 (OsSTK1) was identified as a candidate interacting protein. OsSTK1 appeared to interact with OsNug2 both in vitro and in vivo. OsSTK1 was found to have no effect on the GTP-binding activity of OsNug2; however, the presence of recombinant OsSTK1 in OsNug2 assay reaction mixtures increased OsNug2 GTPase activity. A kinase assay showed that OsSTK1 had weak autophosphorylation activity and strongly phosphorylated serine 209 of OsNug2. Using yeast complementation testing, we identified a GAL::OsNug2(S209N) mutation-harboring yeast strain that exhibited a growth-defective phenotype on galactose medium at 39<SUP>o</SUP>C, which was divergent from that of a yeast strain harboring GAL::OsNug2. The intrinsic GTPase activity of OsNug2(S209N), which was found to be similar to that of OsNug2, was not fully enhanced upon weak binding of OsSTK1. Our findings indicate that OsSTK1 functions as a positive regulator of OsNug2 by enhancing OsNug2 GTPase activity. In addition, phosphorylation of OsNug2 serine 209 is essential for its complete function in biological functional pathway.

무항생제 돈육 및 무농약 농산물에 대한 소비자 구매 선호도 및 인식도

김일석,하창주,진상근,이신우,이정일,이문희,허순구 진주산업대학교 산업과학기술연구소 2007 산업과학기술연구소보 Vol.- No.14

무항생 돈육 및 무농약 인증 농산물에 대한 인식도와 인지경로 조사결과, 무항생제 돈육에 대해서 들어본 적이 있다는 질문에 75%, 무농약 인증 농산물은 61.4%가 그렇다라고 답하였다. 무항생제 돈육 인지경로에 대한 물음에 TV/라디오가 38.1%, 신문이나 잡지광고가 33.3%로 나타났다. 무항생제 돈육에 대한 신뢰도 조사에서 46.4%가 신뢰, 13.6% 불신뢰, 40.0% 무응답으로 나타나 부정적인 의견이 많은 것으로 조사되었다. 무농약 인증 농산물에 대해서는 각각 47.9, 17.1, 35.0%로 무항생제 돈육에 대한 신뢰도와 비슷하게 조사되었다. 무항생제 돈육 및 무농약 인증 농산물을 이용하여 생산된 육제품의 구입의향은 적극적인 구입의사가 22.1%, 구입한다가 43.6%로 나타났다. A total 140 housewives in Gyoungnam province were surveyed. About 75% consumers expressed that they listen about antibiotics-free pork by acknowledged 38.1% from TV/radio and 33.3% from newspaper/magazine. The investigation of confidence was found in confidence (46.4%), non-confidence (13.6%) and non-answer (40.0%) by antibiotics-free pork. Also, the pesticide-free agriculture products were found in confidence (47.9%), non-confidence (17.1%) and non-answer (35.0%), similar as antibiotics-free pork appearance of results. Again, consumers purchase thought antibiotics-free pork and pesticide-free agriculture products were found positive (65.7%).

Corrigendum to ''Sobolev estimates for averaging operators over a convex hypersurface in R³'' [J. Math. Anal. Appl. 412 (1) (2014) 244-268]

Hong, S.,Heo, Y.,Yang, C.W. Academic Press 2015 Journal of mathematical analysis and applications Vol.423 No.2

<P>The proof of Proposition 1.1 in S. Hong et al. (2014) [3] is erroneous and we reprove it. (C) 2014 Elsevier Inc. All rights reserved.</P>