• 대한교통학회지
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• 제26권5호
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• pp.63-72
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• 2008

현재 우리나라 신호교차로는 긴급차량에 대한 우선신호(Preemption) 제어전략을 적용하지 않고, 긴급차량의 교차로 진입 및 통과여부와 관계없이 일반적인 신호로 운영되고 있다. 본 연구에서는 국내외 긴급차량 Preemption 제어 전략을 검토하고. 이를 국내 교통상황을 대상으로 시뮬레이션을 통해 평가하여 교통상황에 따른 효과의 변동성을 분석하였다. 그리고 실제 현장자료를 기반으로 평가하여 국내 적용성 평가를 실시하였다. 분석결과 긴급차량 preemption 제어가 긴급차량의 운영에 긍정적인 영향을 주나 v/c가 증가 할 수록 이와 같은 효과는 감소하는 것으로 나타났다. 그리고 일반차량의 경우는 preemption 제어로 인하여 지체가 증가하고 통행속도가 감소하였으나 네트워크 전체적으로는 큰 차이가 없는 것으로 분석되었다. 그러므로 교통상황에 따라 개선효과의 차이는 존재하지만, preemption 제어 알고리즘을 국내에 도입한다면 사회적으로 긍정적인 효과가 있을 것으로 기대된다.

• 대한간호학회지
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• 제30권3호
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• pp.791-798
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• 2000

The hemodialysis patients with chronic renal disease have experienced negative emotions, especially depression among with physical, social, and psychological changes. Based upon a stress-coping theory, group imago psychotherapy which can induce effective coping through self awareness and positive emotional responses is implemented to the hemodialysis patients. The effects of the imago psychotherapy in regards to comfort and depression are studied here. Group imago psychotherapy was performed on forty-three subjects(twenty subjects in the experimental group and twenty-three subjects in the control group). The results of the study were as follows. After being given group imago psychotherapy, the comfort scores of the experimental group were significantly higher than those of the control group (F=15.33, p= .003). Moreover, after being given treatment, the depression scores of the experimental group were significantly lower than those of the control group (F=9.14. p=.0044). Specifically, the scores on comfort in the experimental group under emotion-focused coping style were significantly higher than those of the control group (F=18.59, p= .0002). The mean difference on comfort scores in the experimental group under problem - focused coping style was higher than that of the control group. But their scores were not significant (F=0.19, p= .6729). The scores on depression in the experimental group under emotion-focused coping style were significantly lower than those of the control group (F=14.62, p= .0006). The mean difference on depression scores in the experimental group under problem - focused coping style was much lower than that of the control group. But their scores were not significant (F=0.31, p=.5947). There was a significant positive correlation between comfort and depression variables. After group imago psychotherapy the hemodialysis patients recognized positive changes in emotional reponses, self awareness, self control, ease of mind, and felt overall more relaxed. Imago psychotherapy is a nursing intervention which as this study has shown can improve to comfort. The results of this study can be applied to general nursing practices. In the view of holistic nursing, the development of the nursing practice combined with imago psychotherapy will contribute to the enlargement of the nursing field with conventional nursing practices.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2000년도 전력전자학술대회 논문집
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• pp.752-755
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• 2000

This paper describes a new algorithm for active power filters which can be control source current symmetrically under unbalanced condition in power system. Positive sequency voltage is detected by symmetrical coordinate method and compensating reference current of active power filters is calculated using by accurate phase angle information of positive sequency voltage. The basic principle of the proposed method is described in detail and the conventional and proposed phase detecting methods are compared and discussed through the simulation results.

• Bulletin of the Korean Chemical Society
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• 제10권5호
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• pp.452-458
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• 1989

The static and dynamic phenomena of a model for the metabolic control system with positive feedback are discussed with the static and dynamic renormalization group theory. Then, the explicit results for the static and dynamic exponents are obtained up to the second order of ${\varepsilon}$-expansion, ${\varepsilon}$ being 4-d, where d is the space dimensionality of the system.

• 한국전자파학회논문지
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• 제12권6호
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• pp.994-1001
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• 2001

본 논문에서는 이동 통신 시스템에서의 PIC기법으로 간섭을 제거하여 개선된 SIR을 기반으로 하는 전력 제어 방식을 제안한다. 일반적으로 전력 제어는 SIR을 기반으로 하는 방식이 사용되고 있다. 그러나 이 방식은 시스템의 안정성을 떨어뜨리는 Positive Feedback 현상을 발생시킨다. 따라서 제안된 전력 제어 기법은 SIR의 변수인 간섭신호를 감소시켜 개선된 SIR을 기반으로 하는 전력제어를 수행하여 시스템의 안정화를 도모하였다. 또한 이동국에서 기존의 Up-Down전력 명령대신 Up-Maintain-Down기법을 이용하여 성능을 향상시켰다. 새로운 전력 제어 기법인 개선된 SIR방식과 기존의 방식을 모의 실험을 통하여 비교, 제안된 시스템의 성능 개선을 확인했다.

• 아태비즈니스연구
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• 제14권4호
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• pp.255-273
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• 2023

Purpose - This study examines whether internal control has an effect on stock price informativeness about future earnings. High quality internal control provides continuous assurance for the quality of financial reports, and these future earnings-related information is accurately reflected in the current stock price. Design/methodology/approach - This study collected 12,862 data from 2006 to 2021 in China to make an empirical analysis using the future earnings response coefficient (FERC) and the multiple regression analysis were hired in order to analyze the data. Findings - We find that internal control strengthens the association between current returns and future earnings, indicating that more information about future earnings is reflected in current stock prices. This positive effect exists in both the main board market and the growth enterprise market of China's stock market, especially in the main board market after the implementation of the internal control policy. In addition, we find that the positive effect is weaker for firms that report internal control deficiencies or receives non unqualified internal control audit opinions. The results using earnings persistence yield similar findings, further supporting the results based on the FERC model. Research Implications or Originality - Our tests provide strong evidence that the quality of internal control affects FERC in China stock market.

• 아동학회지
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• 제32권1호
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• pp.71-85
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• 2011

The purpose of this study was to develop a parent education program enhancing mother's positive interactions in the context of mother-toddler play and to examine the effects of the program. Participants were 47 pairs of toddlers and their mothers who were randomly assigned to either a treatment or a control group. Both treatment and control groups participated in the 8 sessions of the play class. Only treatment groups received the parent education program during the sessions. Data were analysed by t-tests using SPSS 15.0. Results showed that (1) the mothers' positive interactions have been increased; (2) the mothers' parenting efficacy and pleasure have also been increased, whereas the parenting stresses were decreased in the treatment groups. In conclusion, this parent education program in the play session was effective in helping the mothers' positive interactions and perceptions on parenting toddlers.

• 대한한의학회지
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• 제42권4호
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• pp.197-207
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• 2021

Objectives: The purpose of this study was to confirm effect of reducing inflammation of Coptis chinensis extract-ceramide complex through the endocannabinoid system (ECS) control in atopic dermatitis. Methods: 8-week-old ICR mice were divided into normal group (Ctrl), lipid barrier elimination group (ADE), palmitoylethanolamide treated group after lipid barrier elimination (PEAT), and Coptis chinensis extract-ceramide complex applied group after lipid barrier elimination (CRA). After inducing atopic dermatitis, cannabinoid receptor (CB) 1, CB2, CD68, p-I𝜅B, iNOS, substance P and serotonin were observed to confirm the regulation of the ECS, macrophage activity and mast cell activity. Results: CB1 and CB2 showed higher positive reactions in the CRA than in the ADE and PEAT. CD68, p-I𝜅B and iNOS showed higher positive reaction in the ADE, PEAT and CRA than in the Ctrl, but the increase in the positive reaction was lower in the CEA compared to the ADE and PEAT. Substance P and serotonin showed higher positive reaction in the ADE, PEAT and CRA than in the Ctrl, but the increase in the positive reaction was lower in the CEA compared to the ADE and PEAT. Conclusions: The effects of Coptis chinensis extract -ceramide complex were confirmed on the regulation of the ECS, macrophage activity and mast cell activity.

• 동의생리병리학회지
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• 제21권6호
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• pp.1483-1490
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• 2007

This study was carried out to investigate the effects of GCP treatment on the expression of NOS, c-fos, serotonin and substance P in central nerve system of monosodium iodoacetate(MIA)-induced osteoarthritic pain model. Arthritis was induced by injection of MIA(0.5 mg) into knee joint cavities of rats. Arthritic rats were divided into control(n=8) and treated(n=8) group. Control group was taken distilled water for 20 days. Treated group was taken extracts of GCP by oraly for same duration. Normal group(n=8) was infected with normal saline and was taken distilled water for 20 days. The numbers of NADPH-d positive cells in superficial dorsal horn of spinal cord of treated group($21{\pm}5$) was significantly (p<0.01) decreased compared with control($33{\pm}5$). The numbers of NADPH-d positive cell in dorsolateral periaqueductal gray matter of treated group($111{\pm}16$) was significantly(p<0.01) decreased compared with control($143{\pm}14$). The numbers of c-fos positive cells in dorsal periaqueductal gray matter of treated group($57{\pm}16$) was significantly(p<0.01) decreased compared with control($78{\pm}13$). The numbers of c-fos positive cells in paraventricular thalamic nucleus of treated group($60{\pm}15$) was significantly decreased compared with control($88{\pm}27$). The numbers of serotonin positive cells in median raphe nucleus of treated group($171{\pm}31$) was significantly(p<0.05) decreased compared with control($217{\pm}48$). On the basis of these results, we concluded that GCP treatment has inhibiting effects on the pain transmission in monosodium iodoacetate-induced osteoarthritic pain model in rat.

• Journal of Periodontal and Implant Science
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• 제31권2호
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• pp.371-388
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• 2001

A novel glucanhydrolase(DXAMase) from a mutant of Lipomyces starkeyi(KSM 22) has been shown effective in hydrolysis of mutan, reduction of mutan formation by Streptococcus mutans and removal pre-formed sucrose-dependentadherent microbial film and DXAMase has been strongly bound to hydroxyapatitie. These in vitro properties of Lipomyces starkeyi DXAMase are desirable for its application as a dental plaque control agent. This study was performed to determine the adjunctive oral hygiene benefits and safety of dextranase(Lipomyces starkeyi KSM 22 DXAMase)-containing mouthwash when used alongside normal tooth-brushing. This 6-month clinical trial was placebo-controlled double-blind design evaluating 1U/ml dextranase mouthwash and 0.12% chlorhexidine mouthwash. A total 39 systemically healthy subjects, who had moderate levels of plaque and gingivitis were included. At baseline, 1, 3 and 6 months, subjects were scored for plaque accumulation(Turesky modification of Quingley-Hein's plaque index), gingivitis status($L\ddot{o}e$ and Silness gingival index), and tooth stain(Area and severity index system by Lang et al). Additionally, oral mucosal examinations were performed and subjects questioned for adverse symptoms. Two weeks after pre-experiment examinations and a professional prophylaxis, the subjects provided with allocated mousewash and instructed to use 20-ml volumes for 30s twice daily after toothbrushing. All the groups showed significant increase in plaque accumulation since 1 month of experiment. During 6 months' period, the Dextranase mouthwash group showed the least increase in plaque accumulation, compared to the Chlorhexidine mouthwash and placebo groups. As for gingival inflammation, all the groups showed significant increase during 6 months of experiment. The Experimental group(Dextranase mouthwash) also showed the least increase in gingival index score, compared to the Positive control(Chlorhexidine mouthwash)as well as the Negative control(placebo)groups. Whereas the tooth stain was increased significantly in the Positive control group, compared to the baseline score and the Negative controlgroup since 3 months of mouthrinsing. It was significantly increased after 6 months in the Experimental group, still less severe than the Positive control group. As for the oral side effect, the Experimental group showed less tongue accumulation, bad taste, compared to the Positive control group. From these results, mouthrinsing with Lipomyces starkeyi KSM 22 dextranase provided adjunctive benefits to toothbrushing, comparable to 0.12% chlorhexidine mouthwash in inhibition of plaque accumulation and gingival inflammation and local side effects were if anything less frequent and less intense than chlorhexidine, with long-term use of the mouthwash. All data had provided positive evidence for Lipomyces starkeyi KSM 22 dextranase as an antiplaque agent and suggested that further development of dextranase formulations for plaque control are warranted.