• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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• pp.738-739
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• 2006

This paper will describe a powder and processing method that facilitates single press-single sintered densities approaching $7.5g/cm^3$. At this sintered density, mechanical properties of the powder metal (P/M) component are significantly improved over current P/M technologies and begin to approach the performance of wrought steels. High performance gears have the added requirement of rolling contact fatigue durability that is dependent upon localized density and thermal processing. Combining high density processing of engineered P/M materials with selective surface densification enables powder metal components to achieve rolling contact fatigue durability and mechanical property performance that satisfy the performance requirements of many high strength automotive transmission gears. Data will be presented that document P/M part performance in comparison to conventional wrought steel grades.

• Corrosion Science and Technology
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• 제20권4호
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• pp.169-174
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• 2021

In this study, performance tests, a field evaluation, and a life cycle cost (LCC) analysis for high performance coating systems were conducted to prepare a plan to reduce the cost of maintenance coating and contribute to the service life extension of steel bridges by applying high performance coatings to steel bridges that will be constructed in the future. From the deterioration models based on the field evaluation for chlorinated rubber and urethane topcoat systems, which have been applied often, the mean service lives were derived as 20.8 and 26.6 years, respectively. For the other coating systems that have not been applied in practice, the coordination factors were differentially applied with evaluation items. The most durable coating system was predicted to be thermal spray coating (TSC) primer/epoxy intermediate coat/fluoride resin topcoat, with a predicted value as long as 42.2 years. The LCC analysis indicates that partial application of high performance coating, such as TSC and fluoride resin, to specific parts vulnerable to corrosion and ultraviolet ray (UV) is more advantageous than the use of general coating systems.

• Computers and Concrete
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• 제23권6호
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• pp.459-470
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• 2019

Apart from strength properties, durability, toughness and workability are also important criteria in defining the performance of a concrete structure. Hence "High Performance Concrete (HPC)" is introduced. It is different from high strength concrete and can have various applications. In this paper, the properties (Mechanical and Durability) of High Performance Concrete blended with bagasse ash at 5%, 10%, 15% and 20% are studied. However, it is difficult to analyze the performance based on different properties obtained from different experiments. Hence it is necessary to combine all the criteria/properties into a single value to obtain a result by a technique called Analytical Hierarchy Process (AHP).It is an effective tool for dealing with complex decision making, and may aid the decision maker to set priorities and make the best decision. In addition, the AHP incorporates a useful technique for checking the consistency of the decision maker?s evaluations, thus reducing the bias in the decision making process.

• The Journal of Asian Finance, Economics and Business
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• 제8권3호
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• pp.605-618
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• 2021

The use of human resources determines the success of enterprises. This study applies the questionnaire design method to analyze the relationship between job stress, job satisfaction, and job performance, noting that few studies have comparatively examined these variables between industries, especially between high-tech and traditional industries. The proposed assessment model in this study can facilitate decision-makers' ability to make the optimal business decisions through their personnel systems, thereby improving employee satisfaction and increasing job performance. This study found that in the traditional and high-tech industries, some demographic variables have significant differences in the job stress, job satisfaction and job performance, but the demographic variables that can significantly affect the differences in these job's variables are differences between industries. This study acknowledges that job stress and performance have a significantly negative correlation, and traditional industries will have more stress factors than high-tech industries. In addition, support for traditional industries exist in job satisfaction and performance has a significantly positive correlation, but not in high-tech industries. Job stress for performance has a significantly negative correlation in two industries. This study reconfirmed the relationship between job stress, satisfaction and performance, found some differences in this relationship and the respective industrial characteristics.

• 정보과학회 컴퓨팅의 실제 논문지
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• 제23권5호
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• pp.293-298
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• 2017

최근 고성능 네트워크 기술을 기반으로 다수의 컴퓨터를 활용하여 클러스터를 구축하고 고성능 컴퓨팅 환경을 제공하기 위한 연구가 활발하게 이루어지고 있다. 이와 같은 고성능 클러스터 환경에서 각 컴퓨팅 노드의 데이터 처리 성능을 향상시키기 위하여 Redis, Memcached와 같은 인-메모리 기반 키-값 데이터 저장소를 활용하고 있다. 이를 통해 인-메모리 기반으로 데이터를 분산 저장하고 각 컴퓨팅 노드에서 필요한 데이터를 고속으로 접근할 수 있다. 인피니밴드는 이와 같은 고성능 클러스터에서 각 컴퓨팅 노드를 연결하기 위한 사실상의 표준 기술이다. 본 논문에서는 키-값 데이터 저장소 기반 고성능 클러스터 컴퓨팅 시스템의 데이터 처리 성능을 향상시키기 위해 인피니밴드 네트워크의 데이터 송수신 지연 특성을 활용한 데이터 선반입 기법을 제안한다. 시뮬레이션을 통해 제안 기법이 기존 기법보다 데이터 송수신 소요시간을 최대 약 28% 줄여 컴퓨팅 성능을 향상 시킬 수 있음을 보인다.

• 한국컴퓨터정보학회논문지
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• 제29권2호
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• pp.179-195
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• 2024

하이테크 기업의 기술 혁신은 경영 성과에 긍정적인 영향을 미친다. 따라서, 하이테크 기업의 경영 성과에 영향을 주는 요인 및 정도를 파악하는 것은 기업의 경제적 효용을 촉진하고 기업의 효율성 기반을 강화하는 것을 목표로 하고 있다. 또한, 하이테크 기업의 시장 점유율 향상에도 정의 유의한 영향을 미친다. 본 연구는 하이테크 기업의 특징을 기반으로 연구개발 투자 강도, 특허출원 수와 무형 자산 증가량이라는 3가지 요인을 선택하고 경영 성과에 대한 영향 메커니즘과 효과에 대해 이론적으로 분석하고 근거를 제시하였다. 2011년부터 2019년까지 중국 하이테크 기업관련 데이터를 사용하여 실증분석을 진행하였고 분석 결과는 다음과 같다. 하이테크 기업의 연구개발 투자 강도는 경영 성과에 유의한 정의 영향을 미치고 하이테크 기업의 특허 출원 수도 경영성과에 유의한 정의 촉진작용을 하며 하이테크 기업의 자산 부채율은 경영 성과에 대하여 유의한 부의 영향을 미친다. 마지막으로, 관련된 건의 사항과 시사점을 논의하였다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 학회창립 10주년 기념 1999년도 가을 학술발표회 논문집
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• pp.553-556
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• 1999

In this dissertation, experimental research was carried out to study the hysteretic behavior of reinforced high-strength concrete beam-column joints designed by high performance techniques, such as application of high-strength concrete, reducing of joint regions damage, moving of beam plastic hinge. Specimens(HJAI, HJCI), designed by the development of earthquake-resistant performance, moving of beam plastic hinge, and new design approach, were attained the moving of beam plastic hinge and developed significantly earthquake-resistant performance of such joints.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1995년도 봄 학술발표회 논문집
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• pp.171-176
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• 1995

In recent years, Hith Performance Concrete has attracted world wide attention for its workability, strength and long-term durability. A field test was conducted to confirm the properties of high performance Concrete in situconditions. This paper describes the concrete materials, mix proportions, fresh state properties, some aspects of placability and qualty control results for field test. From the result, it was found that it is possible to produce High Performance Concrete with self-compactable and high strength.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 추계종합학술대회 논문집(2)
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• pp.67-70
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• 2000

DSP is used for processing the digital data in such as the multimedia applications. Because the digital data of high rate is demanded more and more, high performance is increasingly required in DSP. In this paper, we discuss important issues for development of high performance DSP, analyze architectures of several commercial DSP chips, and propose a new architecture. Finally, we show that the new architecture has the highest performance.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 봄 학술발표회 논문집
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• pp.629-634
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• 2001

This study is to characterize the material property of early age high performance concrete emphasizing compressive strength using nondestructive testing methods. Three high performance concrete slabs of 600, 850 and 1100kg/$cm^{2}$ compressive strengths were prepared together with cylinders from same batches. Cylinder tests were peformed at the ages of 7, 14, 21 and 28 days after pouring. Using the impact echo method, the compression wave velocities were obtained based on different high performance concrete ages and compressive strengths. The equation to obtain the compressive strengths of high performance concrete has been developed using the obtained compression wave velocities. Using the SASW (spectral analysis of surface wave) method, the equation have also been developed to obtain the compressive strengths of high performance concrete based on the surface wave velocities.