• International Journal of Industrial Entomology and Biomaterials
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• 제4권2호
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• pp.133-136
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• 2002

Whitefly, Dialeuropora decempuncta (Quaintance rind Baker) (Homoptera: Aleyrodidae) has attained the major pest status in mulberry, causing 24% crop loss by sucking the leaf juice and manifesting leaf curl, chlorosis and sooty mould desease during monsoon season in West Bengal, India. The assessment of economic threshold revel is an essential component for formulating the management practices. Experiments were carried out by inoculating five different densities of whitefly viz.,10, 20, 30, 40 and 50 adults on covered mulberry plants in glass houses. From the findings, it was observed that irrespective of released density, no crop loss was observed in the initial period. But with the passing of days, the percent crop loss was increased rapidly. The linear relationship between percent crop loss and number of adults released was established to highlight the significance of economic threshold. The statistical analysis in the linear form of equation showed that initial population of 10, 20, 30, 40 and 50 whiteflies/plant causes 3%, 12%, 21%, 30% and 40% crop loss in a period of 28 days which is equivalent to 57 kg, 247 kg, 437 kg, 626 kg and 816 kg leaf/acre. Execution of management practices (spray of 0.01% monocrotophos) are economical to the farmer whenever the loss is above 247 kg/acre, but below which application of control measures is not economical. From this study, it can be inferred that the economic threshold level far whitefly is 20 individuals/plant beyond which a farmer has to take appropriate control measures.

• 한국지진공학회논문집
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• 제27권6호
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• pp.311-320
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• 2023

When an earthquake occurs, the severity of damage is determined by natural factors such as the magnitude of the earthquake, the epicenter distance, soil properties, and type of the structures in the affected area, as well as the socio-economic factors such as the population, disaster prevention measures, and economic power of the community. This study evaluated the direct economic loss due to building damage and the community's recovery ability. Building damage was estimated using fragility functions due to the design earthquake by the seismic design code. The usage of the building was determined from the information in the building registrar. Direct economic loss was evaluated using the standard unit price and estimated building damage. The standard unit price was obtained from the Korean Real Estate Board. The community's recovery capacity was calculated using nine indicators selected from regional statistical data. After appropriate normalization and factor analysis, the recovery ability score was calculated through relative evaluation with neighboring cities.

• 산업공학
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• 제21권4호
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• pp.365-377
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• 2008

In this paper, for constructing the Korean Hazard Information System (KHIS), we conceptually design a hazard evaluation process. We first deal with a hazard evaluation process focused on flood hazard to give the most immense damage and loss. The hazard evaluation process is consist of a damage evaluation process and a loss evaluation process, and is used for transforming hazards from natural disasters into economic measures. The proposed process is developed based on the famous FEMA (Federal Emergency Management Agency)'s $HAZAS^{@MH}$methodology. We modify the FEMA's process to be mutually exclusive and collectively exhaustive, that is all losses from the hazards are included into the estimation process but the losses are not duplicated in the process. In addition to this, we define the loss process specifically by considering the characteristics from the hazard environments of Korea. We can expect that KHIS for evaluating economic losses from natural hazards can be developed based on the conceptual design for the economic loss evaluation process, and KHIS can be used as a useful tool for analyzing the feasibilities of mitigation plans in central/local governments.

• 산업경영시스템학회지
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• 제36권4호
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• pp.109-115
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• 2013

Process Capability Index (PCI) is useful Statistical Process Control (SPC) tool that is measure of process diagnostic and assessment tools widely use in industrial field. It has advantage of easy to calculate and easy to use in the field. $C_p$ and $C_{pk}$ are traditional PCIs. These are only considers of process variation. These are not given information about the characteristic value does not match the target value of the process. Studies of this process capability index by many scholars actively for supplement of its disadvantage. These studies to evaluate the capability of situation of various field has presented a new process capability index. $C_{pm}$ is considers both the process variation and the process deviation from target value. And $C_{pm}{^+}$ is considers economic loss for the process deviation from target value. In this paper development of new process capability index that is Taguchi's quadratic loss function by applying the expected loss. And check the correlation between existing traditional process capability index ($C_{pk}$) and new one. Finally, we propose the criteria for classification about developed process capability index.

• 한국정보통신학회논문지
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• 제16권11호
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• pp.2341-2346
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• 2012

보이스 피싱은 해독능력이 약한 노인과 약자를 대상으로 사회공학적인 방법을 이용하여 경제적 피해를 유발시킨다. 최근 인접국과 연계조직에 의한 보이스 피싱이 많은 국민에게 경제적 손실과 정신적 파탄을 야기하였고 대한민국 전체로 보더라도 보이스 피싱으로 인한 국가경제손실 및 정신적 피해는 매우 크다. 최근 정부와 관련기관들이 보이스 피싱을 막기위한 보안시스템과 금융보안장치를 강화하고 있으나 보안효과가 얼마나 큰가는 검증하기 쉽지 않다. 본 논문에서는 보이스 피싱으로 인한 대한민국의 경제적손실과 보안장치강화에 따른 보안효과의 경제성에 관하여 살펴본다. 우리나라의 보이스 피싱 피해의 직접 피해액은 1,100억 원으로 나타나고 있으며 철저한 보안에 따는 잠재적인 경제적 효과는 연간 3,500억 원 규모에 이른다고 볼 수 있다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 추계학술대회
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• pp.157-160
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• 2012

(보이스)피싱은 해독능력이 약한 노인과 약자를 대상으로 사회공학적인 방법을 이용하여 경제적 피해를 유발시킨다. 최근까지도 중국으로부터 (보이스)피싱이 국민의 경제적 파탄을 야기하였고 대한민국 전체로 보더라도 (보이스)피싱으로 인한 국가경제손실은 매우 크다. 최근 (보이스)피싱을 막기위한 보안시스템과 금융보안장치를 강화하고 있으나 보안효과가 얼마나 큰가는 검증하기 쉽지 않다. 본 논문에서는 (보이스)피싱으로 인한 대한민국의 경제적손실과 보안장치강화에 따른 보안효과의 경제성에 관하여 연구하고자 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.430-431
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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. In study of the planning of domestic and international transmission expansion, the reliability of transmission planning and minimizing Investment cost is focused. However, the study has not been performed systematically in economic aspects. Typically, the congestion and loss costs have been individually calculated. It is not consider the mutual relationship between the congestion cost and the loss cost. This paper proposes a method to compute concurrently the congestion and loss costs. This purpose is to calculate the more exact value for economic assessment of the power system operation.

• 품질경영학회지
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• 제30권3호
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• pp.66-78
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• 2002

Process capability indices are being used as indicators for measurements of process capability for SPC of quality assurance system in industries. In view of the enhancement of customer satisfaction, process capability indices in which loss functions are used to deal with the economic loss In the processes deviated from the target, are in an adequate representation of the customer's perception of quality In this connection, the loss function has become increasingly important in quality assurance. Taguchi uses a modified form of the quadratic loss function to demonstrate the need to consider the proximity to the target while assessing its quality. But this traditional quadratic loss function is inadequate to assessing the quality and quality improvement since different processes have different sets of economic consequences on the manufacturing, Thereby, a flexible approach to the development of the loss function needs to be desired. In this paper, we introduce an easily understood loss function, based on reflection of probability density function of the normal distribution. That is, the Reflected Normal Loss function can be adapted to an asymmetric loss as well as to a symmetric loss around the target. We propose that, instead of the process variation, a new capability index, CpI using the Reflected Normal Loss Function that can accurately reflect the losses associated with the process and a new capability index CpI Is compared with the classical indices as $C_{p}$ , $C_{pk}$, $C_{pm}$ and $C_{pm}$ $^{+}$.>.+/./.

• 한국건축시공학회지
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• 제6권4호
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• pp.103-108
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• 2006

Currently, due to remodeling of newly built apartment, national resource loss and personal economic loss are being occurred and construction wastes are making more environmental issues. This study aims to devise reduction in cost and economic loss coming from remodeling by selecting general house size of apartment, carrying out surveys and investigating current status of remodeling before and after moving into newly built apartments.

• 한국전자거래학회지
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• 제19권4호
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• pp.31-43
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• 2014

최근 많은 사이버 공격은 S/W의 취약점을 이용한 익스플로잇(exploit)으로 이루어지고 있다. 주기적으로 취약점 동향이 발표되고 있으며 이를 참고로 보안의 방향이 제시되고 개선 방안도 수정되고 있다. 그럼에도 불구하고 2011년 한 해 동안 발생한 해킹 등 사이버 공격은 2010년 대비 81% 증가하였고, 이러한 사이버 공격의 약 75%가 S/W 자체의 보안 취약점을 악용하고 있다. 본 논문에서는 S/W 취약점으로 인한 손실비용 측정을 위해 질병 전파 모델인 SIR 모델을 응용하여 취약점에 의한 악성코드 감염 확산 모델인 VIR모델을 제시하고, 이를 한글 S/W 취약점에 적용하여 손실비용이 어느 정도인지를 추정하였다.