• 한국정밀공학회지
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• 제33권7호
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• pp.565-570
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• 2016

This paper presents the characteristics related to needle insertion of a robotic device for the automated biopsy procedure. The automated biopsy device, a main component of the robotic needle insertion type intervention system, allows performance of the full biopsy procedure, except for anesthesia, without direct handling of a radiologist or a tele-operated control. In this study, the needle length parameters corresponding to various insertion depths and precision for needle insertion of the automated biopsy device, are discussed. There were two combinations of needle length parameters for appropriate needle insertion and motion capture-based measurement was performed; 0.156 mm error for the 90 mm length commanded insertion displacement was measured. The pre-defined goal is a maximum 1 mm error and thus our measured error is within the acceptable range. In the repeatability check, it was also shown that the device can implement a highly accurate insertion.

• 농업과학연구
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• 제41권4호
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• pp.275-281
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• 2014

The ozone depletion has caused plants to be exposed to an increased penetration of solar ultraviolet-B (UV-B) radiation. Enhanced UV-B radiation may have influence on biological functions of plant in many aspects including inhibition of photosynthesis. It is evident that UV-B can potentially impair the performance of all three main component processes of photosynthesis, the photophosphorylation reactions of the thylakoid membrane, the $CO_2$-fixation reactions of the Calvin cycle and stomatal control of $CO_2$ supply. Owing to these depressed reactions, the production and allocation of carbohydrates might be markedly affected, and therefore, the growth and development of plant are distinctly reduced. In this review paper, we provide basic theory and further researches in terms of photosynthesis and carbohydrate synthesis in response to elevated UV-B radiation.

• 한국식품영양학회지
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• 제28권3호
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• pp.465-469
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• 2015

An analysis of changes in herbal tea composition according to the difference in processing conditions showed slightly reduced crude protein content and increased, moisture, crude fat and solid elution rate after treatment using the ash puffing process compared to roasting. Benzopyrene content was significantly reduced to 0.18 ppb from 0.51 ppb. This result indicated that, the $B({\alpha})P$ content differed depending on the processing condition and raw materials. Generation of food $B({\alpha})P$ is mainly include the thermal decomposition of food cooking, when the processing which is a main component of food carbohydrate, protein, fat reason despite severe heat treatment as a whole is to be detected even though the $B({\alpha})P$ in this way is considered to be. The taste, aroma and color did not show a large difference, but the strong bitters taste decreased.

• 정보보호학회논문지
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• 제25권5호
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• pp.1001-1009
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• 2015

스마트 그리드 안에서 고안된 스마트 미터는 우리가 사용하는 전력 신호를 실시간으로 데이터화해서 전력 공급단의 메인 서버로 전송한다. 이를 통해 전력 관리의 효율성은 증가한 반면, 사용자의 정보를 담은 데이터의 보안 문제가 새로운 위협으로 부상하였다. 본 논문은 스마트 미터에서 추출한 전력 데이터를 통해 가정 내 기기의 식별 및 기기별 사용패턴에 대한 추론을 보안 관점에서 해석함으로써 스마트 기기 환경에서 데이터 노출의 위협을 지적한다. 주성분분석(Principal Component Analysis)으로 데이터의 특징을 추출하였고 k-근접 이웃(k- Nearest Neighbor)분류기로 기기를 식별하고 기기상태를 추론하였으며, 검증방법으로는 10차 교차검증(10-fold Cross Validation)을 활용하였다.

• 한국군사과학기술학회지
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• 제21권5호
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• pp.607-613
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• 2018

Hydraulic systems are widely used in the field of defense, construction machinery, agricultural machinery, and general industries, due to various advantages such as quick response speed and precision control. The defense equipments such as light rescue vehicle is operated in very harsh environments, so hydraulic components used in defense equipment are required to have very high reliability. In particular, hydraulic piston pump is very important component in a hydraulic systems, so life prediction of pump is essential. Therefore, in this study, we analyze the potential failure and the main failure mode of the hydraulic piston pump for the light rescue vehicle through the FMEA analysis, and predict the life of the pump by the accelerated life test considering the usage conditions.

• The Journal of Asian Finance, Economics and Business
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• 제6권3호
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• pp.81-89
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• 2019

Many authors have examined the impact of public spending on economic growth. This study uses ordinary least-squares technique to test the effect of state budget expenditure with two major components: development investment expenditure and recurrent expenditure on Vietnamese economy for the period 2000-2017. The empirical results show that the state budget expenditure of Vietnam has positive effect on the economy, however each main component has different impacts. Recurrent expenditure has significant positive impact on Vietnamese economy while there has no evidence to affirm the relationship between the development investment expenditure and the economic growth. Vietnamese government should restructure the state budget to enhance the positive effect on the economy. In the short run, Vietnam should not increase development investment expenditure due to low efficency in public investment. In the long run, it is necessary to economize recurrent expenditure to reserve a reasonable proportion of state budget for development investment expenditure to build infrastructure for developing the economy. The state budget expenditure should be restructured towards prioritizing recurrent expenditure on human and social relief, reducing public administration expenditure, allocating investment capital from the state budget for key and pervasive projects, avoiding spreading out investments as well as crowding out private investments.

• 한국초전도저온공학회:학술대회논문집
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• 한국초전도저온공학회 2002년도 학술대회 논문집
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• pp.135-137
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• 2002

In the favor of adjusting microwave signal, Hairpin type Filter, which delay microwave signal enough to several nanosecond, is a key component. One of the main advantage in using Hairpin type Filter is a conveniency for equipping with Delay Module, and because of having a wide bandwidth, Hairpin type Filter can be designed to satisfy the most applications. In this work, we attempted to estimate the delay time in a superconductive hairpin type filter A software to synthesize even and odd order equiripple hairpin type filter has been developed. This software arbitrarily locate its transfer zeros making symmetric of asymmetric amplitude response and equalizing group delay. Borland C++ compiler has been used. The program was designed to run under MS-DOS, Window 98, Window 2000. The program optimizes the position of the transfer function zeros in order to fulfill the group delay specification masks. We designed and fabricated a hairpin type HTS 2-pole microstrip bandpass filter to operate at 5.8Ghz. The fabrication method was pulsed laser deposition and YBCO films were deposited on sapphire substrates with a Ce$O_{2}$ thin layer as a buffer layer. We also developed a new style hairpin type filter by using interdigitide inner-pole. Compared to the same size regular hairpin type filters, our filters had a lower center frequency.

• Journal of the Korean Data and Information Science Society
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• 제4권
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• pp.121-130
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• 1993

불균형 일원 변량모형에서 AOV추정량과 사전값이 0, 1, ${\infty}$인 MINQUE에 국한하여 정규분포를 가정할 때 분산성분의 추정량이 음이 될 이론적 확률을 구하고, 비정규분포에 대해서는 모의실험을 통해 추정량이 음이 될 확률을 구하였다. 이 때 정차분포에서의 이론적 확률과 모의실험에 의해 계산된 확률간에 유의한 차이가 없고 표본수, 수준수 그리고 ${\rho}$가 커지면 각 추정량은 음이 될 확률이 작아지며, 고려된 추정량 중에서 AOV추정량이 대부분의 경우에 음이 될 확률이 가장 작게 나타났다.

• 한국도서관정보학회지
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• 제35권4호
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• pp.423-449
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• 2004

지식사회에서 주요자원은 지식이 되며 이러한 지식을 관리하는 도서관의 역할이 매우 중요하다. 기하급수적으로 증가하는 지식정보들 중 조직구성원들이 필요하고 유용한 지식만을 선택하여 이용자의 취향에 맞는 형태로 제공할 수 있는 지식정보관리가 필요하다. 따라서 이 연구에서는 기존의 도서관 정보봉사에서 나타나는 문제점들을 해결하기 위해 도서관이 수행해야 할 역할 및 기능들을 Help-Desk 서비스 측면에서 온라인과 오프라인으로 구성요인들을 조사하고 분석하였다. 이 결과를 토대로 웹기반 Help-Desk 지식관리 시스템 모형을 제시하였다.

• 한국생활과학회지
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• 제19권1호
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• pp.39-49
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• 2010

This study introduces the construct of meta-parenting or a superordinate category of effortful cognition, including anticipation, assessment, reflection and problems. Also, it aims to analyse meta-parenting in terms of demographic variables and investigate how it relates to other cognitions on parenting and parenting behaviors. One hundred seventy three mothers of preschool children were surveyed on Hawk's (2007) Meta-Parenting, Sameroff and Feil's (1985) Concepts of Development, Stipek, Danniels, Galluzzo, & Milburn's (1992) Activities Sub-scales. They also commented on their views of appropriate methods of child-rearing and the starting age of extra-curricula activity and the number of extra-curricula activities. The main results were as follows: Mothers showed the highest score on assessment followed by anticipation, reflection and problems while these four components of meta-parenting were highly correlated to each other. Among demographic variables, only the mothers' age and education were linked to some component of meta-parenting. Meta-parenting was correlated with complexity of thinking but not with views on appropriate methods of child-rearing. Also, meta-parenting was associated with formal and informal activities at home and the beginning time of providing the extra-curricula activity with the total number of extra-curricula activities provided at present.