The Relationship among Engagement in Workplace Learning Activities, Openness to Learning, and the Extent of Participant Involvement in Informal Learning

Yoon,Dong-Yeol,You,Jieun,Yun,Wi Seok,Hyun,Sunhae 한국인적자원관리학회 2011 인적자원관리연구 Vol.18 No.4

일터학습에 있어서 비공식학습의 중요성이 대두함에 따라, 많은 기업들은 직원들의 비공식 학습을 촉진할 수 있는 다양한 학습전략응사용하고 있다. 기존의 연구들은 기업 내 공식학습과 비공식학습은 상호 연관되어 있어, 공식학습을 제공할 경우 비공식학습도 동시에 활성화된다고 주장한다. 본 연구는 직원들이 기업에서 행해지고 있는 일터학습에 참여하는 정도가 비공식학습활동에 어떠한 영향을 미치는지 연구함으로써, 일터학습의 참여도와 비공식학습의 관계를 알아보고자 하였다. 일터학습에 참여하고 있는 제약회사의 직원들을 대상으로 한 설문조사에 대하여 회귀분석을 실시한 결과, 일터학습에 참여하는 것 자체는 직원들이 비공식학습에 몰입하는 정도에 유의미한 영향을 미치지 못하는 것으로 나타났다. 특히 실천공동체와 온라인 학습의 경우 비공식학습에 부정적 영향을 미치는 것으로 나타났다. 이는 기업이 일터학습을 제공하더라도, 체계적인 형태를 갖추지 못했거나 직원들 간의 상호작용을 촉진하지 못할 경우 일터학습이 오히려 비공식학습을 저해할 수 있다는 것을 보여준다. 그러나 개인의 학습 개방성은 비공식학습의 정도에 영향을 미치는 것으로 나타나, 일터학습의 참여도가 비공식학습의 정도에 미치는 영향에 조절효과를 보이는 것으로 나타났다. 끝으로 연구결과는 관리자 직급에 있는 근로자들의 경우 그렇지 않은 직원들에 비하여 비공식학습활동에 더 많이 참여하고 있다는 것을 보여준다. 관리자 직급의 근로자들은 학습에 대한 경험이 풍부하고, 학습의 필요성에 대해서도 충분히 인식하여 비공식학습활동에도 적극적으로 참여하고 있다고 볼 수 있다. 따라서, 기업 내에서 비공식학습을 활성화시키기 위하여, 종업원들에게 일터학습을 제공하고 이것에 참여하도록 유도하는 것뿐만 아니라, 직원들 스스로 학습에 참여할 수 있는 개방적 태도를 지닐 수 있도록 지원하는 것이 중요하다는 것을 보여준다. Informal learning in the workplace is becoming more important for improving employees’ competencies and organizational performance. Many business organizations use a variety of workplace learning strategies in order to facilitate informal learning among employees. Research on workplace learning explains that formal learning and informal learning interrelate and facilitate each other. This study investigated the relationship among engagement in workplace learning activities, openness to learning, and the extent of participant involvement in informal learning. As a result of quantitative research in a pharmacy company, this study showed the following: (a) openness to learning affects participant involvement in informal learning more than engagement in workplace learning activities does; (b) among types of workplace learning, communities of practice negatively influence internal informal learning, and web-based learning also has a negative effect on involvement in internal, external informal learning and informal learning among newly hired employees, but traditional classroom training positively affects participants’ involvement in informal learning among new employees; and (c) employees at the managerial level involve in informal learning activities more than other employees. These results suggest that business organizations and corporate management should support and facilitate employees to learn with openness as well as provide them with workplace learning opportunities.

The Effects of Whole-Body Vibration Training on Knee Function and Physical Performance of Middle-Aged and Elderly Woman with Knee Osteoarthritis and Chronic Knee Pain

Jieun Yoon,Taishi Tsuji,Akihiro Kanamori,Kiyoji Tanaka,Tomohiro Okura 아시아건강운동학회 2019 Journal of Asian Society for Health & Exercise Vol.1 No.2

The purpose of this study was to elucidate the effects of whole-body vibration training (WBVT) on knee function and physical performance in middle-aged and older Japanese women who suffered from knee osteoarthritis (OA) and knee pain. Thirty-eight middle-aged and older Japanese women (aged 50-73 years) with knee OA and knee pain were divided into two groups: (1) a WBVT group (n = 29) engaging in WBVT 3 times a week for 8 weeks, and (2) a control group (C group, n = 9) performing exercises at home. The WBVT program consisted of a warm-up, strength training mainly of the quadriceps and their surrounding muscles and cool-down exercises. In the WBVT group, there were no dropouts, and there were significant improvements in the physical function (Cohen’s d = 0.28) and total score (Cohen’s d = 0.25) of Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC). There were also statistically significant improvements in all lower-extremity function tests (5-times sit-to-stand, timed up and go, standing time from a long sitting position, sit and reach, 4-way choice reaction time; Cohen’s d = 0.34-1.24). The item that changed significantly in the C group, however, was only the sit and reach (Cohen’s d = 0.52). In addition, all items in the Japanese Orthopaedic Association Score (JOA score) improved significantly (Cohen’s d = 0.63-0.67) in the WBVT group. In conclusion, the 8-week WBVT program can safely improve knee function and physical performance in middle-aged and older Japanese women who suffer from knee OA and knee pain.

Structural and functional characterization of <i>Helicobacter pylori</i> DsbG

Yoon, Ji Young,Kim, Jieun,Lee, Sang Jae,Kim, Hyoun Sook,Im, Ha Na,Yoon, Hye-Jin,Kim, Kyoung Hoon,Kim, Soon-Jong,Han, Byung Woo,Suh, Se Won Elsevier 2011 FEBS letters Vol.585 No.24

<P><B>Highlights</B></P><P>► We have structurally and functionally characterized <I>Helicobacter pylori</I> DsbG. ► The monomeric and dimeric structures of <I>H. pylori</I> DsbG show significant differences compared to <I>E. coli</I> DsbG. ► <I>H. pylori</I> DsbG shows a reductase activity against HP0518, a putative <SMALL>L</SMALL>,<SMALL>D</SMALL>-transpeptidase in <I>H. pylori</I>.</P> <P><B>Abstract</B></P><P>Dsb proteins play important roles in bacterial pathogenicity. To better understand the role of Dsb proteins in <I>Helicobacter pylori</I>, we have structurally and functionally characterized <I>H. pylori</I> DsbG (HP0231). The monomer consists of two domains connected by a helical linker. Two monomers associate to form a V-shaped dimer. The monomeric and dimeric structures of <I>H. pylori</I> DsbG show significant differences compared to <I>Escherichia coli</I> DsbG. Two polyethylene glycol molecules are bound in the cleft of the V-shaped dimer, suggesting a possible role as a chaperone. Furthermore, we show that <I>H. pylori</I> DsbG functions as a reductase against HP0518, a putative <SMALL>L</SMALL>,<SMALL>D</SMALL>-transpeptidase with a catalytic cysteine residue.</P><P><B>Structured summary of protein interactions</B></P><P><B>DsbG</B> and <B>DsbG</B> bind by X-ray crystallography (View interaction).</P>

Whole-body vibration training with maslinic acid on knee function and muscle strength in older adults with knee pain: A randomized, double-blind, placebo-controlled trial

( Jieun Yoon ),( Tomohiro Okura ),( Taishi Tsuji ),( Kenji Tsunoda ) 한국체육학회 2016 국제스포츠과학 학술대회 Vol.2016 No.1

Introduction: Whole-body vibration training (WBVT), a neuromuscular training approach, is an efficient resistance training method. According to the latest systematic reviews and meta-analyses, WBVT significantly improves knee function and muscle strength in older adults with knee pain. Furthermore, maslinic acid (MA) from olives has been proven to reduce inflammation and swelling. This study aimed to compare the effects of WBVT alone with those of WBVT in conjunction with MA on the knee function and muscle strength of older adults with knee pain. Methods: Forty older adults (aged 65.81 years) with knee pain were distributed into two groups: (1) a WBVT plus MA group (n = 20) and (2) a WBVT plus placebo group (n = 20). All individuals took part in 50-min sessions of WBVT, twice a week for 20 weeks. Both groups also took a capsule containing either MA (50 mg) or placebo once per day. The Japanese Orthopaedic Association (JOA) score and knee isokinetic peak torque were used to evaluate observer-reported knee function and muscle strength, respectively. Results: There were no dropouts, with all 40 subjects completing the study up to the post-test. The JOA score showed significant improvement in knee function in the WBVT plus MA group but not in the WBVT alone group. Knee extension and flexion peak torque and power also improved significantly in WBVT plus MA group. In contrast, only knee extension and flexion peak torque improved in the WBVT alone group. Conclusions: These results suggest that WBVT helps improve knee extension and flexion peak torque of participants with knee pain. In particular, the WBVT plus MA group improved remarkably in knee function as well as knee extension power and flexion peak torque. Therefore, it is suggested that a WBVT program in combination with MA is very effective in improving knee function in older adults.

Evaluation of knee function for whole-body vibration training using three scoring methods

Jieun Yoon,Tomohiro Okura,Akihiro Kanamori,Taishi Tsuji 한국체육측정평가학회 2019 한국체육측정평가학회지 Vol.21 No.3

Whole-body vibration training (WBVT) is an effective resistance training method to strengthen muscle. This study examined the effect of WBVT on knee pain. We evaluated the effectiveness of WBVT and measuring methods by comparing muscle function measurements and three different knee function scoring methods before and after a WBVT program. Subjects were 29 females aged 50-73 years with knee pain. They participated in a WBVT program that we designed mainly to improve knee muscle strength for eight weeks (twenty-four 50 min sessions). All subjects completed the WBVT program with pre- and post-WBVT evaluations: muscle function measurements, the clinically-reported Japanese Orthopaedic Association (JOA) Score, and the self-reported Japanese Knee Osteoarthritis Measure (JKOM) and the Western Ontario & McMaster Universities Osteoarthritis Index (WOMAC). The JOA Score, JKOM and WOMAC outcomes showed that our WBVT program effectively relieved knee pain. The JOA Score provided more detailed information on the condition of subjects’ knees than the JKOM and WOMAC results. The measure of joint effusion from the JOA Score and the isokinetic flexion peak torque and average power muscle measurements were significantly related to joint effusion and joint flexion angle. This study suggests that for accuracy in measuring knee function, the clinically-reported JOA Score should be evaluated in parallel with muscle function measurements. This approach can provide quantitative information for patients with knee osteoarthritis.

One-pot route for uniform anchoring of TiO₂ nanoparticles on reduced graphene oxides and their anode performance for lithium-ion batteries

Yoon, Dohyeon,Hwang, Jieun,Kim, Dong Hyun,Chang, Wonyoung,Chung, Kyung Yoon,Kim, Jaehoon Elsevier science 2017 The Journal of supercritical fluids Vol.125 No.-

<P><B>Abstract</B></P> <P>TiO<SUB>2</SUB>-reduced graphene oxide (RGO) hybrids were prepared using one-pot, simultaneous reduction of graphene oxide (GO) to RGO and anchoring of TiO<SUB>2</SUB> nanoparticles on the surface of RGO in supercritical isopropanol. Numerous anchor sites facilitating heterogeneous nucleation of TiO<SUB>2</SUB> particles on GO, and extremely fast nucleation due to the supercritical alcohol led ultrafine, well-dispersed anatase TiO<SUB>2</SUB> nanoparticles to anchor to the RGO sheets in a single step. The unique synthetic approach developed herein was very effective for preventing restacking of graphene sheets during reduction, and for tightly anchoring TiO<SUB>2</SUB> nanoparticles to the RGO surface. When the TiO<SUB>2</SUB>-RGO with a TiO<SUB>2</SUB> loading of 48wt% tested as an anode in lithium-ion battery, it exhibited excellent electrochemical performance with a high reversible capacity of 229mAhg<SUP>−1</SUP> at 50mAg<SUP>−1</SUP> after 50 cycles and a high-rate performance of 115mAhg<SUP>−1</SUP> at 1Ag<SUP>−1</SUP>, and 95% of the initial capacity was retained even after 1000 cycles (at rate of 1Ag<SUP>−1</SUP>).</P> <P><B>Highlights</B></P> <P> <UL> <LI> One-pot, tight anchoring of TiO<SUB>2</SUB> to graphene sheets using supercritical alcohol. </LI> <LI> Uniform decoration of TiO<SUB>2</SUB> on graphene, preventing restacking of graphene sheets. </LI> <LI> High reversible capacity of 229mAhg<SUP>−1</SUP> at 50mAg<SUP>−1</SUP> after 50 cycles. </LI> <LI> Excellent high-rate performance of 115mAhg<SUP>−1</SUP> at 1Ag<SUP>−1</SUP> was achieved. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

A Combination of Soybean and <i>Haematococcus</i> Extract Alleviates Ultraviolet B-Induced Photoaging

Shin, Jieun,Kim, Jong-Eun,Pak, Kum-Ju,Kang, Jung Il,Kim, Tae-Seok,Lee, Sang-Yoon,Yeo, Ik-Hyun,Park, Jung Han Yoon,Kim, Jong Hun,Kang, Nam Joo,Lee, Ki Won,Cifuentes, Alejandro MDPI 2017 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.18 No.3

<P>Soybean-derived isoflavones have been investigated for their preventative effects against UV-induced symptoms of skin damage including wrinkle formation and inflammation. <I>Haematococcus pluvialis</I> is a freshwater species of Chlorophyta that contains high concentrations of the natural carotenoid pigment astaxanthin. Astaxanthin is known to be involved in retinoic acid receptor (RAR) signaling and previously been associated with the inhibition of activator protein (AP)-1 dependent transcription. Based on previous studies, we hypothesized that a combination of soy extract (SE) and <I>Haematococcus</I> extract (HE) may prevent UVB-induced photoaging through specific signaling pathways, as measured by UVB-induced wrinkling on hairless mice skin and expression changes in human dermal fibroblasts (HDFs). The 1:2 ratio of SE and HE mixture (SHM) showed the optimal benefit in vivo. SHM was found to inhibit wrinkle formation via the downregulation of matrix metalloproteinase (MMP)-1 mRNA and protein expression. SHM also inhibited mitogen-activated protein kinase (MAPK) phosphorylation and the transactivation of AP-1 which plays an important role in regulating MMP expression. These results highlight the potential for SHM to be developed as a therapeutic agent to prevent UVB-induced skin wrinkling.</P>

재미를 위한 HCI

윤지은(Jieun Yoon),이인성(Inseong Lee),김진우(Jinwoo Kim),최동성(Dongseong Choi),박지은(Jieun Park) 한국HCI학회 2006 한국HCI학회 학술대회 Vol.2006 No.2

재미를 위한 HCI

윤지은(Jieun Yoon),김진우(Jinwoo Kim),이인성(Inseong Lee),최동성(Dongseong Choi) 한국HCI학회 2006 한국HCI학회 논문지 Vol.1 No.1

반사 음장을 고려한 음향 확산 구조의 위상최적설계

양지은(Jieun Yang),김윤재(Yoon Jae Kim),김윤영(Yoon Young Kim) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.4