• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 1999.06a
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• pp.111-118
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• 1999

In this paper, linearized dynamic characteristics of parallel line pivoted pad thrust bearing(hereinafter refer to PLP thrust bearing) was analyzed by perturbation method with inlet pressure. Inlet pressure and excitation frequency irfluence dynamic characteristics of PLP thrust bearing at all operating condition, such as angular pivot position, mass of pad. Therefore, the characteristics is have to analyzed with inlet pressure, excitation frequency, mass of pad and thickness of pad. Otherwise, the analysis is able to estimate the characteristics over or under.

• Proceedings of KOSOMES biannual meeting
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• 2018.06a
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• pp.72-72
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• 2018

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.450-452
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• 2004

This paper analyzes some important achievements in Ergonomics field in CRT industry. After introducing principal regulatory requirements for CRTs, including ISO 9241 and TCO standards, the paper indicates some theoretical research in ergonomics of the display devices, such as new contrast parameter for appraising the display devices and effects of environment on visual performance at the ergonomic. Then, as the pivot of this paper, some practical progress, in the ergonomics field in CRT manufacturing , are described, such as vacuum sputtering process for advanced CRTs, new developed wet process for getting the multi-coating layers on surface of the panel.

• Journal of the Korean Mathematical Society
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• v.42 no.1
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• pp.1-16
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• 2005

This paper presents a fast factorization algorithm for confluent Cauchy-like matrices. The algorithm consists of two parts. First. a confluent Cauchy-like matrix is transformed into a Cauchy-like matrix available to pivot without changing its structure. Second. a fast partial pivoting factorization algorithm for the Cauchy-like matrix is presented. A new displacement structure cannot possibly generate all entries of a transformed matrix, which is called by 'partially reconstructible'. This paper also discusses how the proposed factorization algorithm can be generally applied to partially reconstructive matrices.

• Tribology and Lubricants
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• v.16 no.4
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• pp.274-281
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• 2000

In this paper, linearized dynamic characteristics of parallel line pivoted pad thrust bearing (here-inafter refer to PLP thrust bearing) was analyzed by perturbation method with inlet pressure. Inlet pressure and excitation frequency influence dynamic characteristics of PLP thrust bearing at all operating conditions, such as angular pivot position, mass of pad. Therefore, the characteristics have to be analyzed with inlet pressure, excitation frequency, mass of pad and thickness of pad. Otherwise, the analysis may be over or under estimate.

• Communications for Statistical Applications and Methods
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• v.9 no.1
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• pp.221-227
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• 2002

The concept of pivot has been widely used in various classical inferences. In this paper, it is proved by use of pivotal quantities that the Bayesian inferences can be arrived at the same results of classical inferences for the location-scale parameters models under the assumption of non-informative prior distributions. Some theorems are proposed in which the posterior distribution and the sampling distribution of a pivotal quantity coincide. The theorems are applied illustratively to some statistical models.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.65-65
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• 2004

스프링은 변위에 상응하는 에너지를 저장하는 기계 요소로서 다양한 분야에 적용되고 있으며, 나선형(helical) 스프링, 와선형(spiral) 스프링, 비틀림 막대, 디스크(disk) 스프링, 판(plate) 스프링, 일정 하중(constant force) 스프링 둥 다양한 종류가 있다. 근래 많이 사용되는 LCD 모니터 가운데 일부는 경사(tilt), 회전(pivot), 방향 전환(swivel) 등 모니터의 각도 변화가 가능하도록 제작되며, 이러한 각도 변화시 사용자가 적절한 반력을 느끼도록 인간 공학적으로 설계되어 있다.(중략)

• Bulletin of the Korean Chemical Society
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• v.33 no.1
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• pp.301-304
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• 2012

• The Journal of Engineering Geology
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• v.23 no.2
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• pp.127-136
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• 2013

We analyzed the patent trends for whole drilling bits to reveal the main R&D directions, focusing on patents applied for and registered in Korea, the USA, Japan, and Europe. The technology was classified into two groups as a primary classification step (reaming systems and fixed systems), and into seven groups as a secondary classification step (sliding, odex, horizontal pivot, vertical pivot, concentric, eccentric, and etc.). A total of 33,614 patents were retrieved and 870 patents were selected for final effective analysis by data deduplication and filtering. A portfolio analysis using the correlation between the number of patents and the applicants for each patents revealed a sliding system as the key technology with greatest growth potential. From an analysis of the barriers to patents being granted, we emphasize the need to avoid similar topics existing patents or patent applications and to develop differential technology.

• Journal of the Korean Home Economics Association
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• v.44 no.3 s.217
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• pp.91-102
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• 2006

The following research compares the two apparel systems that are used in Korean colleges, Gerber and PAD, by analyzing the advantages and disadvantages of their Dart-related functions in the pattern construction process. The results are as follows. 1. Regarding transformation methods, the Gerber system was able to use pivot method, while the PAD system was able to use both pivot method and slash methods. in other issues, the PAD system was not able to synthesize more than two Darts, and only showed differences for other functions. On the other hand, the diamond-shape Dart and diagonal Dart could be produced only in the PAD system, while curvy shaped Dart could not be produced in either system. 2. The change in side lines due to the change of Dart width only occurred in the PAD system, while the change in Dart length only occurred in the Gerber system; both systems need improvement. 3. As for the pattern outer line connection capability, which is a Dart automatic transformation function, both systems showed unnatural shapes which need to be corrected. 4. We first constructed a Dart shape composition chart according to the number of Darts. Based on this, we examined whether they have appropriate shapes. Among single-Darts, the Gerber system had an inappropriate, outer-line shape for Underarm Dart and Center Front Dart, and among two-Darts, it was inappropriate for Side and Waist Dart.