PLSI(공동활용시스템) 통합 사용자 지침서

비매

Interaction networks among tits, insects and plants during the breeding season

학위논문(박사)--서울대학교 대학원 :산림자원학과,2001.Docto

Valuation of Credit Derivatives with Multiple Time Scales in the Intensity Model

We propose approximate solutions for pricing zero-coupon defaultable bonds, credit default swap rates, and bond options based on the averaging principle of stochastic differential equations. We consider the intensity-based defaultable bond, where the volatility of the default intensity is driven by multiple time scales. Small corrections are computed using regular and singular perturbations to the intensity of default. The effectiveness of these corrections is tested on the bond price and yield curve by investigating the behavior of the time scales with respect to the relevant parameters

First-time adoption of IFRS in Samsung total petrochemicals

Thesis(masters) --서울대학교 대학원 :경영학과(SNU Global MBA),2008. 8.Maste

Adaptive Result Verification Based on Fuzzy Inference Model in Desktop Grid Environments

Aresultverificationprocedureisrequiredtoguaranteethecorrectnessoftaskresultsexecutedbyanyunspecifiedresourcesindesktopgrids.Voting-basedandtrust-basedschemeshavetypicallybeenusedfordesktopgrids.However,theseschemescanencountertwoproblems:wasteofresources,duetoedundantreplicationsofeachtask,andincreasedturnaroundtime,duetotheinabilitytodealwithadynamicchangeableexecutionenvironment.Toovercometheseproblems,weproposeanadaptiveresultverificationschemebasedonfuzzyinferencethatcandeterminethenumberofreplicationspertaskneededforresultverification.Ourschemeisbasedontheclassificationofresourcesaccordingtothetrustydegreeandtheresultreturnprobability.Usingthesetwoparameters,wedevelopthefuzzyinferencemodelthatallowscorrecttaskresultstobereturnedbyataskdeadlineforcurrentdesktopgridenvironments.Simulationresultsindicatethatourschemeissuperiortoothersintermsofturnaroundtimeofentiretasks,quantityofresourcesconsumed,andnumberofreallocationspertask

A Study on Chemical Washing Mechanism by Flowing Film of Detergent/Water Solution

This study aims to propose evaluation methods of chemical washing performance and estimate the washing capability by flowing detergent/water solution for application to home appliances such as dishwashers. Standard pollutant is stearic acid. A numerical study is also tried using a SIMPLER code. Preliminary experiments are performed by varying the concentration and temperature of the solution. From the pre-experiments, 10 minute pre-curing time is found to be necessary to remove the stearic acid. Stoichiometric ratio and detergent consumption coefficient of reaction between the detergent and stearic are estimated following a proposed method. Washing experiments of pollutant to compare with the numerical results are performed. The relative errors between the experimental and the numerical results with pre-curing time included are less than 7%. In conclusion, important mechanisms of chemical washing are revealed and methods of predicting washing performance are well established