• 한국콘텐츠학회논문지
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• 제16권7호
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• pp.100-111
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• 2016

본 연구는 노인의 스트레스와 성공적 노화에 있어 낙관성과 가족지지의 매개된 조절효과 검증을 위해 경남지역에 거주하는 65세 이상의 일반노인 584명을 대상을 분석하였다. 분석은 Preacher와 Hayes가 제안한 SPSS Macro방법을 사용하여 경로모형을 통해 연구모형을 검증하였다. 연구모형 검증은 3단계로 실시하였으며, 1단계는 예측변수와 준거변수 관계에서 조절변수가 조절효과를 가지는가를 분석하였고, 2단계는 예측변수와 매개변수의 관계를 확인 후, 3단계에서는 매개된 조절효과를 확인하였다. 분석한 결과를 요약하면 다음과 같다. 첫째, 스트레스와 성공적 노화, 낙관성의 매개효과를 검증한 결과 부분매개모형을 지지하는 것으로 확인되었다. 둘째, 스트레스, 낙관성과 성공적 노화의 가족지지 조절효과를 검증한 결과 조절효과가 모두 있는 것으로 확인되었다. 셋째, 스트레스, 낙관성과 성공적 노화, 가족지지의 매개된 조절효과를 검증한 결과 매개된 조절효과가 있는 것으로 나타났다. 이러한 연구결과를 바탕으로 실천적 함의와 향후 과제를 제시하고, 노년기 성공적 노화를 위한 가족지지 향상방안을 제시하였다.

• 대한한방부인과학회지
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• 제21권1호
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• pp.55-82
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• 2008

Purpose: In this study, we evaluated anti-inflammatory activity and anti-thrombosis effect of Manbunbang(MBB) prescribed to chronic PID patients. Methods: We studied inhibitory effect of platelet aggregation, suppression effect of GPIIb/IIIa activity and inhibitory effect of $TXB_2$ and $PGE_2$ biosynthesis which were caused by ADP, epinephrine, collagen and arachidonic acid in vitro. And suppression of pulmonary embolism, changes of related factors in dextran coagulation condition model and anti-oxidative effect of oxidative damage were studied in vivo. Results: MBB extract showed LD50 of $200\;{\mu}g/ml$ or higher in mouse lung fibroblast cells, and significantly decreased the GPT and GPT level in dextran coagulation condition model compared to the control. MBB extract showed dose-dependent inhibition effect on platelet coagulation induced by ADP, epinephrine, collagen, arachidonic acid. MBB extract showed dose-dependent inhibition effect on GPIIb/IIIa activities compared to the control. MBB extract significantly suppressed TXB2 and PGE2 biosynthesis compared to the control. MBB extract suppressed pulmonary embolism triggered by collagen and epinephrine by 37.5% compared to the control. MBB extract significantly suppressed the decrease of speed of bloodstream caused by blood coagulation in dextran coagulation condition model compared to the control. Concluson : The results strongly suggest the anti-inflammatory activity of Manbunbang through anti-thrombus. Various applications using Manbunbang on inflammatory diseases are anticipated. Anti-oxidative efficacy comparison data between the Manbunbang prescription and the drug compositions may be used as important clinical information, and further investigation of anti-oxidative activities of Chrysanthemum indicum and Rhemaniae Radix should be followed.

• 동의신경정신과학회지
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• 제15권1호
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• pp.101-119
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• 2004

Ginseng Radix Alba and Cyperi Rhizoma were investigated for their anti-depressant effects. For this purpose, forced-swimming test, tail suspension test, hot plate test, reserpine-induced hypothermia, aggressive behavior test were performed. In addition, the brain content of 5-hydroxyindoleacetic acid(a metabolite of serotonin), the monoamine oxidase activity, anticonvulsant effect, sleep enhancement effect were determined. The results are as follows: In the forced swimming test, Ginseng Radix diminished the duration of immobility by 45.5% compared to the control group, while Cyperi Rhizoma showed weaker effect (12.4% reduction) at 2g/kg. In the tail suspension test, the effect of Ginseng Radix(43.7% reduction) are also better than that of Cyperi Rhizoma(15.6% reduction) at 2g/kg. In the hot plate test, Ginseng Radix showed no difference as compared to control, while Cyperi Rhizoma increased the jump latency time by about 25% after administration for 10 days. In the reserpine-induced hypothermia test, both drugs slowly dropped the body temperature compared to the control group, especially the rate of hypothermia of Ginseng Radix was 24.0% at 1g/kg. In the aggressive behavior test, both drugs delayed the onset time, decreased the duration and frequency, of which effects were better in Cyperi Rhizoma. The content of 5-hydroxyindoleacetic acid in mice brain was slightly increased in Ginseng Radix, while Cyperi Rhizoma increased its level almost to the control group. Both drugs inhibited the monoamine oxidase activity in a dose-dependent manner, but the effect(51.2%) of Cyperi Rhizoma was more potent than the effect(11.8%) of Ginseng Radix. In the pentobarbital-induced sleep test, Cyperi Rhizoma exhibited no significant difference against the control group, while Ginseng Radix showed about two-fold enhancement at 2g/kg. The anticonvulsant effect of both drugs delayed the onset time, shortened the duration of convulsion and diminished the lethality, but Ginseng Radix were better than Cyperi Rhizoma.

• 한국치위생학회지
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• 제1권1호
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• pp.133-142
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• 2001

The authors have studied the 8 weeks clinical examination On 32 patients of age 20s for experimental group and 34 patients of the same ages for control group, in order to find out the effect of plaque removal effect and gingival effect by use of the dentifrice contained with the Artemisiae Capillaris extract(dimethylesculetin) and NaCl. The obtained results are as followings: 1. Plaque removal effect is better at the experimental group than at the control group on 2 and 8 weeks(p<0.05). 2. There are not significantly differences on the calculus index and stain index between the experimental group and control group, during the 8 weeks experiment(p>0.05). 3. At the 8 weeks experiment, it revealed the less average scores on the PMA index for experimental group, than that of the control group(p<0.05).

• 대한조선학회논문집
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• 제48권2호
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• pp.113-120
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• 2011

Fins are widely used for roll stabilization of passenger ferries and high performance naval ships, among others. The Coanda effect is noticeable when a jet stream is applied tangentially to a curved wing surface since the jet can augment the lift by increasing the circulation. The Coanda effect has been found useful in various fields of aerodynamics and speculated to have practical applicability in marine hydrodynamics where various control surfaces are used to control motions of ships and the other offshore structures. In the present study, numerical computations have been performed to find proper jet momentum coefficients $C_j$ and trailing edge shapes suitable for the application of the Coanda effect to a stabilizer fin. The results show that the lift coefficient of the modified Coanda fin at the zero angle of attack ${\alpha}$ identically coincides with that of the original fin at ${\alpha}\;=\;25^{\circ}$ when Coanda jet is supplied at the rate of $C_j$ = 0.1. It is also shown that a fixed type fin stabilizer utilizing the Coanda effect can be implemented without changing the fin angle to actively control the motions of ships and the other offshore structures.

• Smart Structures and Systems
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• 제24권1호
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• pp.1-14
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• 2019

Transmission tower-line system is one of most critical lifeline systems to cities. However, it is found that the transmission tower-line system is prone to be damaged by earthquakes in past decades. To mitigate seismic demands, this study introduces a tuned-mass damper (TMD) using superelastic shape memory alloy (SMA) spring for the system. In addition, considering the dynamic characteristics of both tower-line system and SMA are affected by temperature change. Particular attention is paid on the effect of temperature variation on seismic behavior. In doing so, the SMA-TMD is installed into the system, and its properties are optimized through parametric analyses. The considered temperature range is from -40 to $40^{\circ}C$. The seismic control effect of using SMA-TMD is investigated under the considered temperatures. Interested seismic performance indices include peak displacement and peak acceleration at the tower top and the height-wise deformation. Parametric analyses on seismic intensity and frequency ratio were carried out as well. This study indicates that the nonlinear behavior of SMA-TMD is critical to the control effect, and proper tuning before application is advisable. Seismic demand mitigation is always achieved in this wide temperature range, and the control effect is increased at high temperatures.

• 한국멀티미디어학회논문지
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• 제25권8호
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• pp.1097-1108
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• 2022

This paper aimed to design and implement an EMS for real-time power generation control based on wake effect optimization of wind farm, and then to test it in commercial operating wind farm. For real-time control, we proposed the wake band-based optimization and setting the wake effect distance limit, and when the wake effect distance limit was set to 7D in the actual wind farm layout, the calculation time was improved by about 93.94%. In addition, we designed and implemented the script-based EMS for flexible operation logic management in preparation for unexpected issues during testing, and it was installed and tested on a wind farm in commercial operation. However, three issues arose during the testing process. These are the communication interface problem of meteorological tower, the problem of an abnormal wake effect, and the problem of wind turbine yaw control. These issues were solved by modifying the operation logic using EMS's script editor, and the test was successfully completed in the wind farm in commercial operation.

• 치위생과학회지
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• 제12권2호
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• pp.181-188
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• 2012

치위생과 학생의 통제소재와 자기효능감이 스트레스에 미치는 영향을 규명하여 학생들의 학교생활지고와 학습지도에 필요한 기초자료를 제공하고자 2011년 3월 10일부터 3월 20일까지 경기도에 소재한 A여대의 치위생과 학생들을 대상으로 연구를 시행하여 다음과 같은 결론을 얻었다. 1. 통제소재는 평균 8.77로 학생들이 사용하는 통제소재는 내적통제에 가깝다고 할 수 있다. 또한 전체 자기효능감의 평균은 3.23, 일반적 자기효능감은 3.23, 사회적 자기효능감은 3.20으로 평균이상의 자기효능감을 가지고 있었다. 스트레스에서는 전체스트레스평균은 2.32, 교우문제스트레스는 2.05, 경제문제스트레스는 2.33, 진로문제스트레스는 2.29, 부모가족문제스트레스는 2.24, 학업문제스트레스는 2.95로 나타났다. 2. 스트레스는 통제소재와 전체 자기효능감과 부적상관을 보이는 것으로 나타났고 통제소재와 전체 자기효능감은 정적 상관이 있는 것으로 나타났다 (p<.001). 3. 통제소재와 자기효능감이 스트레스에 미치는 영향을 확인한 결과 자기효능감은 전반적인 스트레스에 부적으로 유의한 영향을 끼쳤지만(p<.001) 통제소재는 통계적으로 유의한 결과를 끼치지 않았다. 하위요인에서 자기효능감은 교우문제, 경제문제, 진로문제, 부모가족문제 스트레스에 부적으로 유의한 영향을 미쳤으나(p<.05, p<.001) 통제소재는 통계적으로 유의한 결과를 끼치지 않았으며 학업문제스트레스에는 자기효능감, 통제소재 모두 유의한 영향이 없었다. 4. 통제소재와 스트레스에서 자기효능감의 매개효과를 살펴보면 통제소재가 전체 자기효능감을 거쳐 스트레스로 가는 간접효과가 통계적으로 유의한 것으로 나타났다(p<.001). 결론적으로 자기효능감을 비롯한 치위생과 학생들의 스트레스를 완화시키는 요인들에 관한 관심과 방법의 모색이 필요하다.

• Journal of Information Processing Systems
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• 제18권4호
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• pp.510-523
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• 2022

Considering the problems of poor control effect, weak disturbance rejection ability and adaptive ability of two-wheeled self-balanced robot (TWSBR) systems on undulating roads, this paper proposes a fuzzy neural network active disturbance rejection controller (FNNADRC), that is based on fuzzy neural network (FNN) for online correction of active disturbance rejection controller (ADRC)'s nonlinear control rate. Firstly, the dynamic model of the TWSBR is established and decoupled, the extended state observer (ESO) is used to compensate dynamically and linearize the upright and displacement subsystems. Then, the nonlinear PD control rate and FNN are designed, and the FNN is used to modify the control parameters of the nonlinear PD control rate in real time. Finally, the proposed control strategy is simulated and compared with the traditional ADRC and fuzzy active disturbance rejection controller (FADRC). The simulation results show that the control effect of the proposed control strategy is slightly better than ADRC and FADRC.

• 한국식품위생안전성학회지
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• 제12권3호
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• pp.188-194
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• 1997

The growth inhibition effect of Orally administrated yogurt ACE and Metchnikoffupon E. coli O157:H7 and S. typhimurium inoculated into gastric lumen of rabbits was in vestigated. The rabbits challenged with each 1 $m\ell$ of suspension containing 108 CFU/$m\ell$ of the pathogens were divided into 4 groups by the interval of yogurt administration: A group; preadministrated 7 days before inoculation of the pathogens and fed daily; B group; administrated daily after inocjlation of the pathogens, C group; administrated every 3 days after inoculation of the pathogens; Control group, not fed after inoculation of the pathogens. Each 3 $m\ell$ of yogurt containing 109 CFU/$m\ell$ was orally administrated into rabbits. All yogurt administrated groups (A, B, c) chowed growth ingibition effect on E. coli O157:H7 in one day after inoculation of the pathogen by the level of 0.8~1.0 log CFU/g, compared with the result differences between the control group and the yogurt administrated groups. In the control group after 5 days of inoculation, the number of colonized pathogens was 105~106 CFU/g, whereas 103~104 CFU/g was detected in the yogurt administrated groups. After 10 days of inoculation, the viable pathogen number per gram (g) of the rabbit feces was 103 CFU/g in the control group, whereas the number below 101 CFU/g was detected in the group A, and 102 CFU/g in the control group, B and C. The growth inhibition effect of yogurt administration on E. coli O157:H7 was highly increased in the order of A, B, and C group. The same effect on S. typhimurium was observed at the level of 2 log CFU/g in the Metchnikoff yogurt administrated groups, compared with the control group result in one day after inoculation of the pathogen. In 7 days after inoculation of the pathogen, the viable number was increasingly decreased, and finally after 15 days no viable cell of S. typhimurium was discharged into the fecal samples in the group A, and the mean level of 10* CFU/g was detected in the group B, but there was no growth inhibition effect in the group C. The growth inhibition effect on S. typhimurium was observed at the same level of viable cell number between the yogurt ACE administrated groups and the control group in 5 days after inoculation. But, after 10 days of inoclation the viable cell number was started to decrease, and the viable cell of S. typhimurium was not discharged from rabbit intestinal contents after 15 days of inoculation in the yogurt ACE administrated groups. In such a case that yogurt was administrated in order to prevent the pathogens, pre-administration on a daily basis one week before inoculation of the pathogens exerted considerable effect in growth inhibition. In comparison with two kinds of yogurt tested in this study, the growth inhibition effect on two kinds of pathogens was observed more highly in the Metchnikoff administated group than the ACE administrated group.