• 전기학회논문지
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• 제66권1호
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• pp.7-15
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• 2017

Ambient Adjusted line Rating(AAR) method for overhead transmission lines considering Risk Tolerance(RT) was proposed in this paper. AAR is suitable for system operators to plan their operation strategy and maintenance schedule because this can be designed as a seasonal line rating. Several candidate transmission lines are chosen to apply the proposed method in the paper. As a result, it is shown that system reliability was significantly enhanced through maximizing transfer capability, solving the system constraints.

• Nuclear Engineering and Technology
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• 제51권3호
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• pp.904-907
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• 2019

Nuclear energy remains one of the world's major energy sources, making up over 10% of global electricity generation in 2017. Public acceptance of nuclear energy is essential for its adoption. From a practical perspective, it is beneficial to have a simple indicator that can predict the actual adoption of nuclear energy. Based on practical experience, the authors suggest tolerance and self-sufficiency as potential indicators that may predict the adoption of nuclear energy. By evaluating the cross-sectional data of 18 countries in 2013, this research assesses the actual impact of tolerance and self-sufficiency on public acceptance in order to identify the validity of the two variables. The results indicate that the two variables are statistically significant, while public acceptance is insignificant in explaining national adoption of nuclear energy. This may be because tolerance reflects national willingness to accept potential risk, while self-sufficiency explains a government's likelihood of developing non-carbon energy sources.

• 정보학연구
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• 제2권2호
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• pp.51-67
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• 1999

본 논문은 불확실한 상황하에서 의사결정시 의사결정의 위험도에 대한 정보의 제공과 의사결정자의 위험에 대한 태도가 의사결정에 미치는 영향에 대한 연구이다. 본 연구의 독립변수는 의사결정의 위험도에 대한 정보 제공 여부와 의사결정자의 위험 감수의 정도이다. 종속변수는 의사결정의 위험도와 의사결정 자신감을 의미한다. 본 연구는 주가지수 옵션에 대한 투자의사결정을 연구의 대상으로 하며, 연구의 진행을 위해 4가지 가설을 검증하였다. 본 연구는 연구의 방법으로 실험실 실험을 선택하였다. 실험 대상은 경영학과 학생 107명을 대상으로 하였으며, 실험의 통제 변수는 의사결정의 위험도에 대한 정보의 제공 여부이다. 실험의 의사결정자의 위험감수의 정도가 높을수록 의사결정 자신감도 높음을 알 수 있다. 그러나 의사결정의 위험도에 대한 수치적 경고 메시지는 의사결정자의 의사결정에 그다지 큰 영향을 주지 않음을 알 수 있었다. 본 연구는 실제투자자들을 대상으로 한 연구가 아니므로 실제로 위험한 상황과는 다른 모의투자라는 한계점이 있다.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2000년도 추계학술발표대회 논문집
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• pp.245-248
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• 2000

Modern aircraft composite structures are designed using a damage tolerance philosophy. This design philosophy envisions sufficient strength and structural integrity of the aircraft to sustain major damage and to avoid catastrophic failure. The only reasonable way to treat on the same basis all the conditions and uncertainties participating in the design of damage tolerant composite aircraft structures is to use the probability-based approach. Therefore, the model has been developed to assess the probability of structural failure (POSF) and associated risk taking into account the random mechanical loads, random temperature-humidity conditions, conditions causing damages, as well as structural strength variations due to intrinsic strength scatter, manufacturing defects, operational damages, temperature-humidity conditions. The model enables engineers to establish the relationship between static/residual strength safety margins, production quality control requirements, in-service inspection resolution and criteria, and POSF. This make possible to estimate the cost associated with the mentioned factors and to use this cost as overall criterion. The methodology has been programmed into software.

• Corrosion Science and Technology
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• 제11권5호
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• pp.157-164
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• 2012

In first experiment series, this paper is devoted for examining progress of reinforcement corrosion due to carbonation in concrete and to quantify uncarbonation depth to protect reinforcement from corroding. The tolerance of cover depth should be considered in order to prevent carbonation-induced corrosion. From the relationship between the weight loss of reinforcement and corrosion current density for a given time, therefore, the tolerance of cover depth to prevent carbonation-induced corrosion is computed. It is observed that corrosion occurs when the distance between carbonation front and reinforcement surface (uncarbonated depth) is smaller than 5 mm.As a secondary purpose of this study, it is investigated to examine the interaction between carbonation and chloride penetration and their effects on concrete. This was examined experimentally under various boundary conditions. For concrete under the double condition, the risk of deterioration due to carbonation was not severe. However, it was found that the carbonation of concrete could significantly accelerate chloride penetration. As a result, chloride penetration in combination with carbonation is a serious cause of deterioration of concrete.

• 수면정신생리
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• 제12권1호
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• pp.17-22
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• 2005

Sleep-disordered breathing (SDB) is associated with increased cardiovascular and cerebrovascular morbidity. Epidemiological and clinic-based studies have shown that SDB is related to impaired glucose tolerance and increased insulin resistance, independent of obesity. Despite of a consistent association between SDB and impaired glucose-insulin metabolism, the mechanism underlying this relationship has not been fully elucidated. It is recognized that hypoxemia and hypercapnia that occur in SDB provoke sympathetic nervous activity and catecholamine, epinephrine and norepinephrine, and cortisol are released. Sympathetic hyperactivity and increased catecholamines can impair glucose homeostasis by increasing glycogenolysis and gluconeogenesis, which can result in increased circulating insulin levels and increased risk of insulin resistance. A prospective study is needed to investigate the causal relationship between SDB and impaired glucose-insulin metabolism in a healthy population without diabetes, hypertension and obesity as etiologic risk factors.

• Industrial Engineering and Management Systems
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• 제9권1호
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• pp.54-59
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• 2010

A two-plan sampling system is proposed for a failure-censored life testing when the lifetime follows a Weibull distribution with known shape parameter. The proposed sampling system is based on a switching rule, for switching between the tightened and the normal inspection levels when lots are submitted for inspection in the order of production or in some other systematic way. The design parameters of the proposed sampling system are determined by the two-point approach considering the producer's risks and the consumer's at the specified acceptable reliability level and the lot tolerance reliability level, respectively. It has been observed that the proposed system requires only a single failure for the observation.

• 대한불안의학회:학술대회논문집
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• 대한불안의학회 2005년도 춘계학술대회
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• pp.88-103
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• 2005

o Rational Use of BZ - relative safe, widely useful o Hidden side effects/disastrous effects in vulnerable patients o Review tolerance, dependency, withdrawal symptoms o Consider Drug interaction o Periodic Evaluation of Risk/Benefit of BZ o Advice to patients planning a pregnancy

• 대한불안의학회지
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• 제1권1호
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• pp.31-36
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• 2005

Benzodiazepine (BDZ) has the possibilities of development of tolerance, withdrawal symptoms, and abuse/addiction, as well as chronically adverse effects. Although many guidelines have proposed the restricted prescription of them, their uses in many psychiatric areas as well as primary practice are still wide spread. So we tried to reappraise the clinical characteristics of BDZ and then to consider the appropriate use. Firstly, meta-analyses on long-term use of BDZ indicated the cognitive impairment, which could be improved after discontinuation of BDZ. Next, there have been some evidences that the long-term use of BDZ does not develop tolerance, contrary to our concern, and maintains good anxiolytic effects. Also, physiological dependence should be discriminated from abuse/addiction, assuming the reality that the risk of BDZ abuse/addiction is surely overestimated. These issues are discussed in detail.

• Journal of Preventive Medicine and Public Health
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• 제27권3호
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• pp.425-436
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• 1994

This is to study the incidence of Diabetes and its risk factors in the impaired glucose tolerence group. 1084 subjects who had been examined 3 times for regular check-up in one human dock center under the university hospital were studied between $1986{\sim}1993$. The results are as follows; Prevalence rate of diabetes was 3.56%, and that of impaired glucose tolerence was 30.90% as of initial examination. The rate of diabetes was increasing with the age where 1.2% at age group $30{\sim}39$, 3.21% at age group $40{\sim}49$, 5.84% at age group $50{\sim}59$, 14.28% at age group 60 and over. And also the rate of impaired glucose tolerance was increasing with the age where 21.29% at age group $30{\sim}39$, 31.42% at age group $40{\sim}49$, 38.91% at age group $50{\sim}59$, 33.33% at age group 60 and over Of the examinees who were initially examined, total incidence rate of diabetes who developed to obvious diabetes at the 3rd follow-up examination from the initially impaired glucose tolerence group was 4.63% and it was 11.3 times higher than from the normal group (0.41%). After controlling for the effects of both age and obesity, the risk of subsequent diabetes for subjects with impaired glucose tolerance remained significantly higher than for normal subjects (Relative Risk, 10.48). Test for trends for developing to diabetes by the increasing level of fasting blood sugar and 1hr blood sugar at the initial examination were statistically significant in either normal and impaired glucose tolerence group. To determine the risk factor for developing to diabetes, logistic regression test was applied. Only fasting blood sugar and 1hr blood sugar were predictors for developing diabetes from the impaired glucose tolerence group at initial examination.