• Spatial Information Research
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• 제17권2호
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• pp.243-249
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• 2009

최근 10년간 발생한 자연재해 중 태풍의 피해는 전체의 60%를 넘을 정도로 풍수해의 피해는 막대하며, 지속적 산업화와 개발로 인해 피해 규모 역시 매년 1조원 이상을 상회하고 있어, 자연재해에 대한 피해 경감 노력이 매우 요구되고 있다. 이를 위하여 최근 풍수해의 피해를 사전에 예측함으로써 예방 및 대비는 물론 재해 발생에 따른 응급 대응 및 복구의 효율성을 제고를 목적으로 과학적 방법론 개발 및 연구가 진행되고 있다. 태풍에 의한 피해 예측은 위험도 (Hazard)의 추정, 피해 대상 자료의 구축 (Inventory) 및 피해대상의 취약도 (Fragility)의 세 가지 요소를 이용하여 수행되는 것이 일반적이다. 위험도는 자연재해의 특성인 강우, 풍속 등을 물리적으로 모델링함으로써 추정할 수 있으며, 피해 대상 자료는 공공 및 사유 시설물을 총 망라함으로써 피해의 사회, 경제적인 피해 규모 예측에 활용된다. 각각의 피해 대상이 위험도에 따라 갖는 취약도는 최종 피해 및 손실 규모의 평가 자료로 이용된다. 이때 위험도의 추정 및 피해 대상자료의 구축을 위한 핵심적인 방법론으로서 지리정보시스템의 활용이 크게 요구된다. 따라서 본 연구에서는 태풍 피해 예측을 위한 자연재해 위험성 평가 방법론에 있어서 매우 중요한 요소인 고도 및 자연 지형, 지표의 특성 및 활용도, 피해 대상인 인공 시설물 등의 자료 항목을 분류하여 지리정보시스템을 활용한 태풍 위험 평가 방안을 제시하였다.

• 한국응용곤충학회지
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• 제46권3호
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• pp.409-414
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• 2007

시설 가지에서 아메리카잎굴파리 경제적피해수준 및 요방제수준을 추정하였다. 생육초기 아메리카잎굴파리 접종밀도에 따른 시기별 발생밀도는 5월 17일 접종 후 6월 하순까지는 계속 증가하다가 7월 이후 감소하는 경향이었다. 접종밀도별 지상부 생장 및 과실 생육은 유의한 영향은 없었으나, 총과수 및 수량은 접종밀도가 높을수록 감소하는 경향이었고, 그에 따른 수량감소율은 높아졌다. 피해엽율은 접종밀도가 높을수록 증가하여 20마리/4주 수준에서 65%의 피해가 나타났으며, 상품과수 및 상품과율은 무접종구(12.2%)에 비해 접종밀도가 높을수록 감소하였다. 아메리카잎굴파리 접종밀도에 따른 피해 엽면적비율은 각각 5.3, 11.7, 19.7, 25.7%였고, 이때 수량감소율은 각각 0.6, 4.8, 9.8, 14.7%를 나타내었다. 아메리카잎굴파리 접종밀도(X)와 수량감소율(Y)과의 관계는 Y = 0.76779X + 0.298354 ($R^2\;=\;0.9599$)의 회귀식을 얻을 수 있었고 높은 상관관계가 있는 것으로 나타났으며, 관계식에 의하면 자연감소율을 5%로 고려할 때 경제적피해수준은 6.1마리/4주로 시설가지에서 생육초기 아메리카잎굴파리 요방제수준은 4주당 4.9마리 범위로 추정되었다.

• 한국정보시스템학회지:정보시스템연구
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• 제19권4호
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• pp.253-270
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• 2010

The adjustment of negative emotions in later life is related to the quality of life and life satisfaction. any studies have examined how to control the negative emotions in related to physical, psychological, and social relationships. As the digital media and contents positively influence elder's mental and somatic well-being, it is significant to examine this problem from IT usage, especially the selection of digital contents. This study validated the theoretical study through a qualitative exploratory study comprising both negative emotions and the selection of digital contents, and empirically tested the proposed research model on the older people. The result shows the pattern of linkages between the grief of loss and the pursuit of digital contents. Loss from being parted by death and loss of relations was positively related to the information seeking contents. Economical loss and loss of physical functions was positively related to the innovation seeking contents. Loss of physical functions and Loss from being parted by death was positively related to the emotion seeking contents. And economic loss and loss of relations was positively related to the entertainment seeking contents.

• Communications for Statistical Applications and Methods
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• 제14권1호
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• pp.33-55
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• 2007

The economic world is full of patterns, many of which exert a profound influence over society and business. One of the most contentious is the distribution of wealth. Way back in 1897, an Italian engineer-turned-economist named Vilfredo Pareto discovered a pattern in the distribution of wealth that appears to be every bit as universal as the laws of thermodynamics or chemistry. The present paper proposes some Bayes estimators of shape parameter of Pareto income distribution in censored sampling. Asymmetric LINEX loss function has been considered to study the effects of overestimation and underestimation. For the prior distribution of the parameter involved a number of priors including one and two-parameter exponential, truncated Erlang and doubly truncated gamma have been contemplated to express the belief of the experimenter s/he has regarding the parameter. The estimators thus obtained have been compared theoretically and empirically with the corresponding estimators under squared error loss function, some of which were reported by Bhattacharya et al. (1999).

• 전기학회논문지P
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• 제63권2호
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• pp.107-112
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• 2014

To cope with the ever increasing electric power demands in metropolitan areas, a greater underground cable transmission capacity is required. In general, it must be determined whether the temperature in the tunnel maintains the maximum allowable temperature. In order to improve this point, it is used to the loss factor. But, for economic cooling, it is problem to use such loss factor in this country. In this study, based on the load factor in this country, technique for calculating the loss factor has been presents. The suggested method has been tested in a sample section using the computer and the results have shown the usefullness of the suggested method.

• 산업경영시스템학회지
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• 제28권4호
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• pp.116-123
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• 2005

The traditional process capability indices Cp, Cpk, Cpm, $Cpm^+$ have been used to characterize process performance on the basis of univariate quality characteristics. Cp, Cpk consider the process variation, Cpm considers both the process variation and the process deviation from target and Cpm+ considers economic loss for the process deviation from target. In manufacturing industry, there is growing interest in quantitative measures of process variation under multivariate duality characteristics. The multivariate process capability index incorporates both the process variation and the process deviation from target or considers expected loss caused by the process deviation from target. This paper proposes multivariate capability index based on the expected loss derived from multivariate normal distribution.

• 한국초전도ㆍ저온공학회논문지
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• 제7권3호
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• pp.17-20
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• 2005

AC loss of a high $T_c$ superconducting conductor has a strong influence on the economic viability of a superconducting fault current limiter, which offers an attractive means to limit short circuit current in the power systems. Therefore, several samples of the fault current limiting coils have been fabricated and the effect of conductor's arrangement and current direction on AC loss characteristics investigated experimentally The test result shows that the AC losses measured in the fault current limiting coils depend significantly on the conductor's arrangement. Futhermore, they are also considerably influenced by the conductor's current direction. The AC loss measured in the face-to-face arrangement is smallest among the fault current limiting coil samples.

• 전기학회논문지
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• 제60권11호
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• pp.2021-2027
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• 2011

Recently the power system consists of the more complicated structure, due to increase of power demands. In this circumstance, the congestion and loss capacity in transmission line is also increased. Accordingly, the investment planning of transmission system is required to reduce the congestion and loss of the transmission line. This paper proposes a method to compute the congestion and loss costs which are the key elements in economic assessment of the power system planning. And the benefit of market participants in CBP (Cost Based Pool) is computed. To demonstrate the efficient of the suggested methods, these methods are applied to peak load system of 2016 in the 4th Basic plan of Long-Them Electricity Supply and Demand.

• Earthquakes and Structures
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• 제10권2호
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• pp.429-450
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• 2016

An attempt has been made to incorporate the concept of collapse safety margin into the procedures proposed in the performance-based earthquake engineering (PBEE) framework for direct earthquake loss estimation, in which the collapse probability curve obtained from incremental dynamic analysis (IDA) is mathematically characterized with the S-type fitting model. The regressive collapse probability curve is then used to identify non-collapse cases and collapse cases. With the assumed lognormal probability distribution for non-collapse damage indexes, the expected direct earthquake loss ratio is calculated from the weighted average over several damage states for non-collapse cases. Collapse safety margin is shown to be strongly related with sustained damage endurance of structures. Such endurance exhibits a strong link with expected direct earthquake loss. The results from the case study on three concrete frames indicate that increase in cross section cannot always achieve a more desirable output of collapse safety margin and less direct earthquake loss. It is a more effective way to acquire wider collapse safety margin and less direct earthquake loss through proper enhancement of reinforcement in structural components. Interestingly, total expected direct earthquake loss ratio seems to be insensitive a change in cross section. It has demonstrated a consistent correlation with collapse safety margin. The results also indicates that, if direct economic loss is seriously concerned, it is of much significance to reduce the probability of occurrence of moderate and even severe damage, as well as the probability of structural collapse.

• 대한가정학회지
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• 제38권6호
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• pp.135-147
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• 2000

The purpose of the study was to investigate the effects of economic hardship. parents'intro-eatrovert personality, and depression on parenting. The subjects were 487 seventh to ninth grade children and their parents. Data were collected through questionnaires. Children from which family experienced severe income loss perceived fathers'child-rearing attitudes as more warm/nurturant when fathers had extrovert personality. On the other hand, children under the worse paternal working condition perceived mothers'child-rearing attitudes as more warm/nurturant when mothers had introvert personality. The impacts of family income loss on mothers'rejecting/inconsistant child-rearing attitudes were exacerbated by its indirect effect through maternal depression.