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- 저자 : 박성욱(Sungwook Park) (검색결과 263 건)
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박성욱(Sungwook Park),정성원(Sungwon Jung) 한국정보과학회 2009 정보과학회논문지 : 데이타베이스 Vol.36 No.1
무선 환경에서의 방송은 클라이언트의 수에 상관없이 다수의 클라이언트들에게 데이타를 보낼수 있기 때문에 많은 관심을 이끌어왔다. 다수의 이전 연구들에서는 한 개의 독립적인 데이타를 최단시간에 획득하는 것을 목표로 했고, 한 질의어 내에 포함된 상호 관련된 데이타들을 동시에 획득하는 것에 대해서는 연구되지 않았다. 또한, 이러한 논문들에서는 질의어 내의 데이타들이 동일시간에 다른 채널 상에서 나타나지 않도록 할당하는 문제에 대해서만 연구되었고 질의어 요청 확률을 기반으로 한 각 데이타의 접근확률은 반영되지 않았다. 본 논문에서는 데이타를 할당하고 동시에 한 질의어 속에 포함된 모든 독립된 데이타들을 획득하는데 요구되는 평균응답시간을 최소화하는 새로운 기법을 제시한다. 성능 분석에서는 우리가 제시한 기법이 현존하는 다른 기법들 보다 좋은 평균응답시간을 보여준다. Broadcast in the wireless environment has drawn much attention because it is capable of sending data to clients regardless of the number of clients. Most previous researches have aimed at obtaining an independent data item in a minimum time. But, they have not been researched on simultaneously receiving dependent data items in a query. In addition, these papers have only researched allocation problem that have not been came out data items in a query in same time and different channels. The access probability of each data item based on query request probability have not been reflected. This paper proposes a new method of allocating data items and simultaneously minimizing average response time required in receiving all the dependent data items in a query. Our performance analysis shows that our proposed method gives better average response time over the existing methods.
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가계부문 신용사이클이 채무불이행 위험에 미치는 영향 분석
박성욱 ( Sungwook Park ),임진 ( Lim Jean ),김영일 ( 논평 ) 한국금융연구원 2018 한국경제의 분석 Vol.24 No.3
During the period of economic boom, financial companies are far more lenient on lending in compliance with their loan expansion policy. This is because not only the equity of financial companies improves, but both borrowers and financial companies come to enjoy optimistic views on investment profitability and loan redemption. Consequently, financial companies give out loans even to borrowers with poor debt service ability. These loans granted to ineligible borrowers during the credit cycle boom are excessive loans, in hindsight, deteriorating the quality of loans as a whole. This study investigates whether the growth rate of household debt has significant effect on the delinquency rate by using the micro information of 5.786 million accounts newly opened during 2010 to 2017. Analysis result shows that the higher the growth rate of household debt in a certain period, the higher the insolvency rate of loans made in the corresponding term. Furthermore, this study demonstrates through empirical analysis that credit loans than mortgage loans, non-bank loans than bank loans, and non-wage workers’ loans than wage workers’ loans are more sensitive to credit cycles. In addition, the probability of insolvency is more affected by the credit cycle than economic cycle; and it is estimated that there is little effect of economic cycle on insolvency when credit cycle is controlled. Based on these results, this study suggests that the dynamic loan loss provisions and Countercyclical Capital Buffer (CCyB), the two most typical macroprudential policies, should be accumulated in line with the credit cycle rather than economic cycle for a more direct impact on financial stability. Moreover, it is necessary to differentiate the amount of the dynamic loan loss provisions and CCyB depending on the type of loan. That is, for instance, more loan loss provisions should be accumulated for increment of credit loan than that of mortgage loan to better enhance the overall financial stability.
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Front End Carrier의 상부 구조에 따른 강성 비교 연구
박성욱(Sungwook Park),공태윤(Taeyun Kong),김재용(Jaeyong Kim),소원섭(Wonsub So) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Front End Module is assembled to the front area of the vehicle. In the case of front crash, the Front End Module should be able to absorb the impact and the deformation of Front End Module should be minimized. If the vehicle’s hood deformed by crash is opened, it can make the wind shield of vehicle broken and injure passengers. Because deformed and opened hood can cause the additional accidents, the stiffness supporting hood is very important. The stiffness of all developed vehicles must be verified in the development stage through Hood Latch Retention Test. And the test must be controlled strongly. The stiffness supporting hood & latch has the relationship with the Front End Carrier’s upper structure. The Higher inertia of Upper Section is advantageous, but the upper section can not be secured often because of vehicle’s styling or engine room layout or limitation of cost & weight , ETC, and these factor is different according to the vehicles We have developed several vehicle’s Front End Module since 1999 and we will introduce some kinds of knowhow from the development history of 2 vehicle’ Front End Module.
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