• 한국자원식물학회지
• /
• 제10권4호
• /
• pp.300-304
• /
• 1997

저온관련 유전자인 H28 유전자를 갖고 있는 Agrobacterium MP90균주를 Desiree와 Atlantie 감자 품종의 잎절편과 공동배양한 후 약 6-8주 후에 항생제가 첨가된 선발배지에서 multiple shoots를 얻을수 있었다. 선발된 형질전환체를 대상으로 PCR 방법을 이용한 NPT II 유전자와 H28를 확인한 결과 내한성유전자가 식물체의 genome에 안정적으로 삽입되었음을 확인하였고 northern blot 확인에 의하여 내한성 유전자가 발현됨을 확인하였다.

• 한국직업건강간호학회지
• /
• 제28권2호
• /
• pp.104-113
• /
• 2019

Purpose: This study aimed to investigate the factors affecting general hospital nurses' intention to stay in their jobs. Methods: A descriptive research design was used with a convenience sample of 286 nurses. Data were collected from March 15 to April 14, 2017using self-reported questionnaires and analyzed by descriptive statistics, t-test, analysis of variance, Pearson's correlation coefficient, and multiple regression analysis using the SPSS/WIN 21.0 program. Results: The mean scores for intention to stay, resilience, and emotional labor were 5.28 out of 8, 57.40 out of 100, and 3.23 out of 5, respectively. Intention to stay was positively correlated with overall career (r=.30), workplace (r=.18), shift work (r=-.20), position (r=.28), salary (r=.13), job satisfaction (r=.51), hospital satisfaction (r=.46), and resilience (r=.41). Factors influencing the intention to stay were job satisfaction and resilience, which explained 28% of the variance. Conclusion: Overall career, job satisfaction, and resilience are critical factors affecting general hospital nurses' intention to stay. Based on the findings of this study, efforts to improve nurses' job satisfaction and resilience should be implemented to mitigate the loss of this expert group among healthcare professionals.

• 생태와환경
• /
• 제56권4호
• /
• pp.420-429
• /
• 2023

This study was designed to examine the immune response in Korean rockfish during water temperature fluctuation and to elucidate the factors contributing to streptococcal pathogenesis in cultured Korean rockfish, S. schlegeli. We investigated cumulative mortality against Streptococcus iniae (FP5228 strain) infection in the exposed Korean rockfish (39.7±5.8 g) to environmentally relevant temperature (Control, 23℃; High temperature, 28℃ and 23℃ and 28℃ with 12 hours interval exchange, 23↔28℃) for 48 hours. Also, the expression of the mRNA related to the immune response genes (heat shock protein 70, interleukin1β, lysozyme g-type and thioredoxin-like 1) were measured in spleen and head kidney by real-time PCR analysis in the exposed fish to thermal stress. In this study, the combined stress with bacterial challenge in fishes exposed to thermal stress lowered the survival rate than that of control (23℃). The cumulative mortality in the group of control, 28℃ and 23↔28℃ was 24%, 24% and 40% (P<0.05), respectively. Also, thermal stress modulated the mRNA level of immune related genes; heat shock protein 70, interleukin-1β, lysozyme g-type and thioredoxin-like 1 in Korean rockfish. The present study indicates that a high and sudden water temperature change affect immune responses and reduce the disease resistance in Korean rockfish.

• 한국중재학회지:중재연구
• /
• 제28권1호
• /
• pp.99-123
• /
• 2018

Korean businesses engaging in transactions with U.S. entities are increasingly favoring arbitration clauses to address unexpected disputes. How best ought the parties' arbitration contractual terms be drafted to avoid lengthy, protracted and expensive legal disputes? Authors examine the public policy favoring arbitration through the U.S. Federal Arbitration Act. Korean litigants seeking a "Motion to Compel Arbitration" rely on arbitration clauses designed to address four factors U.S. courts use to evaluate the enforceability of arbitration contract clauses. What role does U.S. state court jurisdiction hinder or help Korean businesses contracting with U.S. business entities located within certain boundaries? What is the effect of an arbitration clause that designates the Korean Commercial Arbitration Board in Seoul to arbitrate? All cases analyzed entail Korean business entities. Eleven cases demonstrate the results of seeking motions to compel arbitration in U.S. courts. Three cases illustrate motions to compel arbitration drafted to use the Korean Commercial Arbitration Board in Seoul. The results provide Korean businesses and legal practitioners insight into addressing the specific goals of including contractual arbitration clauses to enhance their international commercial interests in the United States.

• 한국광학회지
• /
• 제10권1호
• /
• pp.64-67
• /
• 1999

전송용 고아섬유로 320km의 분산천이 광섬유를 사용하여 10Gb/s 광링크를 구성하고 전송실험을 수행하였다. 광링크는 10Gb/s 광송수신기, 광전력 증폭기, 3개의 광전로 증폭치 증폭기 및 전송용로 구성되어Tdmaum 전송거리에 따른 비트 오율 특성에 대하여 조사하였다. 전송실험 결과 광선로 증폭기의 입력세기가 -18dBm이고, 이득이 28dB인 경우 수신기 입력단에서 측정된 광학적 신호대 잡음비는 28dB로 나타났으며, 광섬유를 사용하지 않은 경우와 비교하여 2dB의 전력 패널티가 발생한 것으로 나타났다. 광섬유 전송 후 발샹한 2dB의 전력 패널티는 광학적 신호대 잡음비 열화에 의해 1dB, 경로 패널티에 의해 1dB가 발생하는 것으로 조사되었다.

• The Journal of Korean Physical Therapy
• /
• 제28권4호
• /
• pp.227-231
• /
• 2016

Purpose: This study was conducted to explore the effects of aerobic exercise on the severity of disease and walking ability in patients with Parkinson's disease. Methods: Twelve patients with Parkinson's disease participated in the study. Participants were randomly assigned to either an aerobic exercise group (n=6) or a self-exercise group (n=6). All participants underwent treadmill training for 30 minutes. In addition, the experimental group (aerobic exercise group) and control group (self-exercise group) participated in a 30 minutes exercise program. In both groups, exercise was performed five times a week for four weeks. Outcome including disease severity (Unified Parkinson's Disease Rating Scale) and walking ability (10 m walking speed test, 6 minutes walking test, timed up-and-go test) were measured at baseline and after 4-weeks. Results: Significant differences in disease severity and walking ability were observed between the pre- and post-exercise groups (p<0.05). The improvement of disease severity and walking endurance was significantly higher in the experimental group than in the control group (p<0.05). Conclusion: These findings demonstrate that aerobic exercise is effective at improving disease severity and walking endurance in patients with Parkinson's disease.

• 한국농공학회:학술대회논문집
• /
• 한국농공학회 2002년도 학술발표회 발표논문집
• /
• pp.177-180
• /
• 2002

This study is performed to properties of ready mixed concrete (RMC) in site. The unit weight of the B company's RMC is range from $2,308kg/m^3\;to\;2,355kg/m^3$ and that of the J company's RMC is range from $2,288kg/m^3\;to\;2,310kg/m^3$. The compressive strength of B company's RMC of curing age of 7 days is range from $191kgf/cm^2-232kgf/cm^2$ and that of curing age of 28days is $273kgf/cm^2{\sim}306kg/cm^2$. The compressive strength of J company's RMC of curing age of 7 days is range from $151kgf/cm^2{\sim}177kgf/cm^2$ and that curing age of 28 days is range from $215kgf/cm^2{\sim}234kgf/cm^2$. The B and J company's air content is range of $3.2{\sim}5.2%$. The content of Chloride of the Band J company's is range from each $0.026kg/m^3{\sim}0.046kg/m^3\;and\; 0.034kg/m^3{\sim}0.069kg/m^3$, respectively.

• 수산해양교육연구
• /
• 제28권3호
• /
• pp.701-712
• /
• 2016

The purpose of this study was to investigate the effect of democratic and autocratic behavior type of dance art instructors in elementary dance education on class satisfaction focused on mediations of flow and perceived competence. A total of 500 questionnaires were distributed but insincerely replied or double-replied questionnaires were excluded and finally 453 questionnaires were analyzed for this study. For the analysis of the data, SPSS 18.0 version was used and double mediation model operating in serial, proposed by Hayes and a bootstrapping method were used. First, instructor's democratic behavior type was statistically positive effect on class satisfaction. However autocratic behavior type was statistically negative effect. Second, the indirect effect of instructor's democratic type and autocratic behavior type on class satisfaction through the flow were statistically positive significant. Third, the indirect effect of instructor's democratic behavior type on class satisfaction through the perceived competence was statistically significant. However autocratic behavior type was statistically negative effect. Lastly, the indirect effect of instructor's democratic and autocratic behavior types on class satisfaction through the flow and perceived competence were statistically positive significant.

• 대한기계학회논문집B
• /
• 제28권5호
• /
• pp.535-544
• /
• 2004

The heat (mass) transfer characteristics in the tip-leakage flow region of a high-turning first-stage turbine rotor blade has been investigated by employing the naphthalene sublimation technique. The heat transfer data in the tip-leakage flow area for the tip clearance-to-span ratio, h/s, of 2.0% are compared with those in endwall three-dimensional flow region without tip clearance (h/s : 0.0 %). The result shows that the thermal load in the tip-leakage flow region for h/s = 2.0% is more severe than that in the endwall flow region for h/s : 0.0%. The thermal loads even at the leading and trailing edges for h/s = 2.0% are found larger than those for h/s = 0.0%. The tip-leakage flow results in heat transfer augmentations near the tip on both pressure and suction sides in comparison with the mid-span results.

• 한국수산과학회지
• /
• 제9권4호
• /
• pp.233-237
• /
• 1976

충무연안의 한실포에서 인평포에 이르는 굴${\cdot}$홍합 양식장(Fig.1)을 중심으로 1975년 7월부터 1976년 9월까지 매월, 해수, 이토, 굴 및 담치에서 V.parahaemolyticus와 V. alginolyticus의 분포를 조사한 결과를 요약하면 다음과 같다. 1. 해수, 이토, 굴 및 담치, 420개 시료에서 parahaemolyticus 51균주와 V. alginolyticus 160 균주를 분리하였다. 2. 월별분리율은 7월-9월에 가장 높았다. 3. 시료별 parahaemolyticus의 분리율은 이토$(28\%)$, 해수$(24\%)$, 담치$(5\%)$ 및 굴$(4.2\%)$의 순이였다. 4. 조사지점별 분리율은 station 1 과 5가 다른 조사지점에 비해 가장 높았다. 5. 분리된 211 균주의 형태적 생리적 생화학적성상은 전형적인 parahaemolyticus 및 V. alginolyticus와 및 일치하였다.