• Journal of Information Technology Applications and Management
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• 제12권2호
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• pp.29-43
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• 2005

The paper presents the EBORD (Extended Benchmark for Object-Relational Databases) benchmark, which is an extension of the BORD benchmark for object-relational databases. The EBORD benchmark is developed to evaluate the database common functions that should be supported in modern database systems. Besides the 36 test queries already defined in the BORD benchmark, totally 22 test queries in five categories are newly defined in order to measure the index-relevant performance issues and database import capabilities. The EBORD benchmark also features scalability, use of a synthesized database, and a query-oriented evaluation. In order to show the feasibility of the proposed benchmark, we implement it with two commercial database systems. The experimental results and analyses are also reported.

• 한국정보처리학회논문지
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• 제7권7호
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• pp.1997-2007
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• 2000

This paper presents a new benchmark for object-relational database systems, which are regarded as the next-generation database system. This benchmark has been developed to evaluate system performance peculiar to object-relational database systems. The design philosophy, test databases, an test queries of the benchmark are presented. This benchmark features scaleability, use of a synthesized database only, and a query-oriented evaluation. We have implemented his benchmark with two commerical object-relational database systems and the experimental results are also reported.

• 경영과학
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• 제29권3호
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• pp.1-11
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• 2012

This paper considers a localization problem in time difference of arrival (TDOA)-based radio frequency identification (RFID) systems. To estimate the position of a target tag, this paper suggests three localization algorithms that use benchmark tags. The benchmark tags are the same type as the target tag, but either the locations or distance of the benchmark tags are known. Two algorithms use the benchmarks for auxiliary information to improve the estimation accuracy of the other localization algorithms such as least squared estimator (LSE). The other one utilizes the benchmarks as essential tags to estimate the location. Numerical tests show that the localization accuracy can be improved by using benchmark tags especially when an algorithm using the LSE is applied to the localization problem. Furthermore, this paper shows that our benchmark algorithm is valuable when the measurement noise is large.

• Nuclear Engineering and Technology
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• 제55권10호
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• pp.3639-3647
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• 2023

This paper defines a 3D full core neutronics benchmark which is based on the NuScale small modular reactor (SMR) concept. The paper provides a detailed description of the NuScale-like core, a list of expected outputs, and a reference solution to the benchmark exercises obtained with the Monte Carlo code Serpent. The benchmark was developed in the framework of the Euratom McSAFER project and can be used for verification of computational chains dedicated to 3D full-core neutronics simulations of water cooled SMRs. The paper is supplemented with a digital data set to ease the modeling process.

• 한국측량학회지
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• 제29권3호
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• pp.319-325
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• 2011

우리나라의 수준점은 성과계산에 있어서 실측중력에 의한 정사보정량 계산을 실시하지 않고 정규중력을 이용한 정사보정량 계산을 함으로써 정확한 정표고가 아닌 정규정표고를 사용하여 왔다. 본 연구에서는 우리나라 1,2등 수준노선을 대상으로 직접 중력을 관측하고 정사보정량을 계산하였으며, 그 결과에 따라 우리나라 수준점 체계개선방안을 제시하고자 하였다. 연구를 위하여 강원도 지역의 속초~강를구간의 1등수준 노선과 속사~인제구간의 2등 수준노선을 대상으로 CG5 디지털중력계를 이용하여 직접 중력관측을 실시하고 상대중력성과를 계산하였으며, 중력성과에 기초하여 정사보정량을 계산한 결과 1등 수준노선에서 최대 -0.349mm, 최대 -44.060mm의 값을 보였다. 따라서 우리나라에서 보다 정확한 수준점 체계로 개선하기 위해서는 실측중력에 의한 정사보정량의 계산과 정사보정량을 고려한 정표고 산정이 필요한 것으로 확인되었다.

• 정보과학회 논문지
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• 제43권4호
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• pp.411-418
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• 2016

최근 낸드 플래시 메모리가 널리 보급됨에 따라 기존 파일 시스템의 한계를 보완하고 낸드 플래시 메모리의 장점을 활용하기 위한 파일 시스템 연구가 활발히 진행되고 있다. 이렇게 제안된 파일 시스템들에 대해서는, 일반적으로 벤치마크를 통해 성능 측정이 이루어진다. 서버나 모바일 환경에서 실제 시스템의 성능 측정이 어려울 경우, 벤치마크는 측정하고자 하는 실제 시스템에 대한 직접적인 성능 측정 대신 워크로드를 통해 재현된 환경에서 소프트웨어적 성능 측정을 가능하게 한다. 이 때, 성능 측정 환경이 실제 시스템이 아니기 때문에 측정하는 시스템 환경에 따라서 일정하지 않은 성능 측정 결과를 보인다. 이에 본 논문에서는 파일 시스템의 성능을 측정하는데 흔히 사용되는 벤치마크 중에서 Filebench를 이용하여 여러 가지 시스템 환경에 따른 성능 측정 결과를 살펴보고 측정 결과의 변동이 생기는 원인을 알아본다. 실험 결과, 캐시 내부에 벤치마크 I/O 외의 성능 측정에 불필요한 I/O가 많이 발생할수록 벤치마크의 성능 측정 결과가 떨어지는 것을 확인하였다. 또한 fsync 동작이 포함된 백그라운드 I/O를 동작시키는 경우에는 최대 98.2%의 성능 저하가 발생하는 것을 확인하였다.

• 대한원격탐사학회지
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• 제39권4호
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• pp.459-466
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• 2023

In the last decade, artificial intelligence's dramatic advancement with the development of various deep learning techniques has significantly contributed to remote sensing fields and satellite image applications. Among many prominent areas, super-resolution research has seen substantial growth with the release of several benchmark datasets and the rise of generative adversarial network-based studies. However, most previously published remote sensing benchmark datasets represent spatial resolution within approximately 10 meters, imposing limitations when directly applying for super-resolution of small objects with cm unit spatial resolution. Furthermore, if the dataset lacks a global spatial distribution and is specialized in particular land covers, the consequent lack of feature diversity can directly impact the quantitative performance and prevent the formation of robust foundation models. To overcome these issues, this paper proposes a method to generate benchmark datasets by simulating the modulation transfer functions of the sensor. The proposed approach leverages the simulation method with a solid theoretical foundation, notably recognized in image fusion. Additionally, the generated benchmark dataset is applied to state-of-the-art super-resolution base models for quantitative and visual analysis and discusses the shortcomings of the existing datasets. Through these efforts, we anticipate that the proposed benchmark dataset will facilitate various super-resolution research shortly in Korea.

• 충청수학회지
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• 제34권2호
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• pp.157-168
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• 2021

This study uses the benchmark interest rate of the Federal Open Market Committee (FOMC) to predict gold futures prices. For the predictions, we used the support vector machine (SVM) (a machine-learning model) and the long short-term memory (LSTM) deep-learning model. We found that the LSTM method is more accurate than the SVM method. Moreover, we applied the Boruta algorithm to demonstrate that the FOMC benchmark interest rates correlate with gold futures.

• 기술사
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• 제22권3호
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• pp.5-13
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• 1989

A major problem of stopwatch time study is how to do for the accurate and consistent performance rating, which is one of the critical variables to determine the accuracy of work measurement and should be still dependent upon time observer's judgement. Therefore the time observer's ability for the performance rating is very important, and must be improved by correct training method and procedure. This paper developed a new benchmark and benchmark-observation method for the effective performance rating training of assembling and machining operations. The trainees' ability in the accuracy and consistency of the performance rating ,improved significantly after being trained by subject method. The percentage improvement in rating accuracy and consistency values was 34.7% and 49% respectively. In addition, benchmark-practice method for the performance rating training is not significant, so it is proofed that the skill of a certain operation is not important for the improvement of the rating ability.

• Nuclear Engineering and Technology
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• 제50권7호
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• pp.1024-1036
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• 2018

In this paper, McCARD code was verified using various models listed in the NUREG/CR-6361 benchmark guide, which provides specifications for single pin-cells, single assemblies, and the whole core classified depending on the nuclear properties and structural characteristics. McCARD code was verified by comparing its results with those of SCALE code for single pin-cell and single assembly benchmark problems. The difference in the multiplication factor obtained through the two codes did not exceed 90 pcm. The benchmark guide treats a total of 173 whole core experiments. The experiments are categorized as simple lattices, separator plates, reflecting walls, reflecting walls and separator plates, burnable absorber fuel rods, water holes, poison rods, and borated moderator. As a result of numerical simulation using McCARD, the mean value of the multiplication factors is 1.00223 and the standard deviation of the multiplication factors is 285 pcm. The difference between the multiplication factors and the experimental value is in the range of -665 pcm to + 1609 pcm. In addition, statistics of results for experiments categorized by reactor shape, additional structure, burnable poison, etc., are detailed in the main text.