• 분석과학
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• 제5권2호
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• pp.199-202
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• 1992

$BF_2$를 50keV, 90keV로 에너지를 달리하여 주입한 실리콘 기판에 타이타늄을 sputter하여 Ti-slicide를 형성한 시편과 composite target을 사용하여 Ti-silicide를 형성한 시편을 준비하였다. Ti-silicide 형성시 boron의 거동을 SIMS(secondary ion mass spectrometry)로 분석하였다. Metal-Ti target을 사용한 경우 Ti-silicide 형성시 불순물들이 재분포하였으며 이온 주입 에너지가 작은 경우 심한 out-diffusion이 발생하였다. 한편 Composite target을 사용한 경우 거의 재분포가 발생하지 않고 안정된 boron의 분포를 보였다.

• 대한지역사회영양학회지
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• 제20권1호
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• pp.21-29
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• 2015

Objectives: Maintaining a balanced diet is very crucial for adolescents. However, adolescents, who may have a short notion about the amount of food, find it difficult to plan daily meals by applying the target pattern proposed by the Korean Nutrition Society. This study was carried out to revise the target pattern based on cooked dishes instead of raw material food groups as an easier way for Korean adolescents to plan their meals. Methods: Target pattern for Korean adolescents were revised based on the following: $1^{st}$, categorize dish groups, $2^{nd}$, calculate representative values of each dish based on the adolescent' intake amount. $3^{rd}$, assign the recommended number of intake for each dish. Validity of the target pattern for Korean adolescent meal plan was examined by the energy content, energy contribution ratio, and NAR & INQ of nutrients. Results: The 11 dish groups categorized were bab; gook tang gigae; side dishes of meat, fish, egg, legume, kimchi, vegetable, seaweed; and between meal of fruit, and milk dairy product. Based on the representative energy values, recommended number of intake were assigned to each dish. For boys, bab and gook tang gigae: 3 each; meat, fish, egg, and legume: 1 each; kimchi and vegetable: 3 each; seaweed: 1; fruit and milk dairy product: 2 each were assigned. For girls, bab and gook tang gigae: 2 each; meat, fish, egg, and legume: choice of 3 dishes, 1 each; kimchi and vegetable: 3 each; seaweed: 1; fruit and milk dairy product: 2 each were assigned. Energy contents, energy contribution ratio of carbohydrate, protein, and fat for boys and girls were in adequate range. The NARs were 1.0 and INQs were ${\geq}1.0$ for all nutrients examined. Conclusions: Revised dish-based, instead of food-based adolescent target patterns for boys and girls were easier and a valid way of Korean adolescent meal planning.

• 대한안전경영과학회지
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• 제11권1호
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• pp.115-120
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• 2009

Single PPM Quality Innovation Movement is originally developed quality program in Korea for supplier's quality level-up since 1995. The quality target is below the 10ppm(parts per million) in outgoing quality and delivered goods plus field claim. This Single PPM Quality Innovation Movement program was conducted to realize the anticipated results not only due to management result level's increasing, but also the company's confidence and competitiveness. This study attempted to find the mutual influences on the participation of the constituent members, satisfaction of the constituent members and results of the management from Single PPM Quality Innovation Movement. The reliance analysis for the measurement material on the questionnaire was verified by Cronbach's alpha coefficient. Participation of the constituent members, satisfaction of the constituent member and result of the management, the influences upon Single PPM improvement degree level were verified through the structural analysis by using SPSS statistic package. The influence evaluation among the groups was evaluated by the structure equation.

• 한국응용과학기술학회지
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• 제32권2호
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• pp.232-239
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• 2015

화학기상증착법(CVD)을 이용하여 Cu-foil 위에 합성된 대면적의 단층 그래핀(Graphene)을 폴리머 탄성융합체 PDMS(Polydimethylsiloxane)를 이용하여 건식으로 전사하는 기술을 연구하였다. 이때, $UV/O_3$처리를 통해 목표 기판(target substrate)의 표면 개질을 변화시켜 그래핀의 손상이 최소화되로록 그래핀을 전사하였다. 이 과정을 반복 실행하여 그래핀을 다층(1~4 layers)으로 $SiO_2/Si$기판 위에 적층하였으며, 전사된 다층 그래핀의 품질평가를 위하여 광투과율과 면저항의 변화를 측정하였다.

• 한국인터넷방송통신학회논문지
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• 제14권6호
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• pp.107-112
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• 2014

본 논문에서는 레이더 시스템에서 단일 펄스 방식, 집적 상관 방식, 비 집적 상관 방식의 신호대 잡음비 성능에 대해서 비교 분석하였다. 그리고, 공간상에 두 목표물에 대한 방향을 추정하여 기존의 방법과 비교 분석하였다. 레이더 시스템에서 일반적으로 반사파와 전송파의 왜곡을 방지하고 감소시키기 위해서 펼스파를 이용하여 신호를 전송한다. 본 논문에서는 수신신호를 처리하는 방식으로 포락선 검파기 앞에서 처리하는 집적 상관방식과 과 포락선 검파기 뒤에서 처리하는 비 집적 상관 방식의 성능을 비교 분석하였다. 모의실험을 통하여 목표물 방향을 추정하였고, 두 목표물의 탐지 거리를 추정하여 신호대 잡음비 성능을 비교 분석하였다. 집적 상관방식의 성능이 우수함을 입증하였다.

• 수산해양기술연구
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• 제51권2호
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• pp.272-278
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• 2015

The aim of this study is to find out the behavior and acoustic backscattering of the large jellyfish Nemopliema nomurai using hydroacoustics in situ. N. nomurai was distributed at depths ranging from 10~15 m during the day. Regarding the behavior of N. nomurai, there was no significant change in depth, and 3D tortuosity was not high. The vertical direction was ${\pm}10^{\circ}$ from the horizontal, and moving speed was $0.9{\sim}1.5\;m\;s^{-1}$. With regard to hydro-acoustical characteristics, the mean TS of N. nomurai ranged from -69.6~-56.0 dB at 38 kHz and -69.4~-54.5 dB at 120 kHz. TS variation (Max TS-Min TS) at 38 and 120 kHz was 0~10.2 dB and 0.2~16.0 dB, respectively. Mean TS and TS variation (Max TS-Min TS) of N. nomurai were higher at 120 kHz than at 38 kHz. The results showed that the use of hydroacoustics was effective in estimating the distribution depth, behavior, and acoustic characteristics of the target.

• 한국환경과학회지
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• 제19권1호
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• pp.47-59
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• 2010

This study was to examine the characteristics of wirdbirds habitat for improvement plan in green corridor. The target site, Gangseo-gu artificial green corridor was set up with the structure in which small scale of core green space with Goongsan and Yeomchang neighborhood parks in urbanized city was connected with the artificial green space with Gongamnaru, Hwanggeumnae neighborhood parks with 28~42.5 m in width. Wild birds six~eleven species; Dendrocopos spp, Paradoxornis webbiana, Parus major, Phasianus colchicus, etc. were observed in core green, but wild birds of two~five species: Columba livuia, Passer montanus, Pica pica, Hypsipetes amaurotis, etc. were observed in artificial green space. Thus wild birds of artificial and generalist species only moved in artificial green space. The artificial green space where vegetation structure was consisted of single-layer with poorness chose target species laying stress on generalist species and edge species of Parus major, P. palustris, Paradoxornis webbiana etc. for short-term and interior species of Dendrocopos major, Picus canus, etc. for long-term. The result suggested enhancement methods for target species's habitat in green corridor: to secure at least a corridor 30 meters in artificial corridor, to secure ecological pond, to offer the various shelterer and environment of prey-resources through the multi-layer structure.

• 한국전자파학회논문지
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• 제27권11호
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• pp.996-1003
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• 2016

도착시간(Time of arrival : TOA)을 이용한 삼변측량법은 레이다 시스템에서 단일목표물의 위치를 추정할 때 일반적으로 사용되는 기법으로 다중 목표물의 경우에는 각 목표물에 대응되는 측정치를 구별할 수가 없으므로 활용이 어려운 단점이 있다. 본 연구에서는 이러한 측정치와 목표물 간 관계의 모호성을 없애고자 최근 레이다 분야에서 활발히 연구되고 있는 마이크로 도플러를 통해 각 목표물의 마이크로 모션을 측정하여 각 목표물의 측정치를 구별하는데 활용하였고, 구별된 측정치로 각 목표물에 대해 삼변측량법을 적용할 수 있게 하였다. 목표물은 모탄에서 분리되는 자탄을 고려하였으며 시뮬레이션 결과를 통해 제안한 알고리즘을 검증하였다.

• 제어로봇시스템학회논문지
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• 제8권11호
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• pp.976-983
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• 2002

We presents a modified variable dimension filter with input estimation for maneuvering target tracking. The conventional variable dimension filter with input estimation(VDIE) consists of the input estimation(IE) technique and the variable dimension(VD) filter. In the VDIE, the IE technique is used for estimation of a maneuver onset time and its magnitude in the least square sense. The detection of the maneuver is declared according to the estimated magnitude of the maneuver. The VD filter structure is applied for the adaptation to the maneuver of the target after compensating the filter parameter with respect to the estimated maneuver when the detection of the maneuver is declared. The VDIE is known as one of the best maneuvering target tracking filter based on a single filter. However, it requires too much computational burden since the IE technique is performed at every sampling instance and thus it is computationally inefficient. We propose another variable dimension filter with input estimation named 'Modified VDIE' which combines VD filter with If technique. Modified VDIE has less computational load than the original one by separating maneuver detection and input estimation. Simulation results show that the proposed VDIE is more efficient and outperforms in terms of computational load.

• 한국CDE학회논문집
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• 제22권2호
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• pp.101-109
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• 2017

In order to reduce the number of casualties by improving the survivability of the combat vehicle, the vulnerability analysis of the combat vehicle is needed. However, the actual test for the vulnerability analysis requires large experimental space and expensive equipment costs long time and large expense. It is needed to develop a new method that can replace the actual test. In the paper, we suggested a new approach to analyzing the vulnerability using the M&S method instead of the actual test. To analyze the vulnerability, the shot line analysis is performed to find out which part is penetrated by the bullet. The component of the parts is simplified to "Single-Target", "Double-Target", "Air gapped-Target" and can be performed the penetration analysis using the ANSYS Explicit Dynamics. The penetration depth and the residual velocity of the bullet are calculated by analyzing penetration of each part of the combat vehicle. The penetration data calculated the penetration analysis can be used to define the damage level of the combat vehicle. The purpose of this paper is to collect penetration data for various targets and bullets. And "7.62mmAP" is used as the bullet, "7075-T6" is used as a target.