• 반도체디스플레이기술학회지
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• 제3권2호
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• pp.23-26
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• 2004

Thin film is one of the most general structures used in micro-electro-mechanical systems (MEMS). To measure the mechanical properties of SU-8 film, tensile testing was adopted which offers not only elastic modulus but also yield strength and plastic deformation by load-displacement curve. Tensile testing system was constructed with linear guided servo motor for actuation, load cell for force measurement and dual microscope for strain measurement.

• Journal of the Korean Data and Information Science Society
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• 제21권6호
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• pp.1353-1359
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• 2010

Basic objective in cluster analysis is to discover natural groupings of items. In general, clustering is conducted based on some similarity (or dissimilarity) matrix or the original input data. Various measures of similarities between objects are developed. In this paper, we consider a clustering of huge categorical real data set which shows the aspects of time-location-activity of Korean people. Some useful similarity measure for the data set, are developed and adopted for the categorical variables. Hierarchical and nonhierarchical clustering method are applied for the considered data set which is huge and consists of many categorical variables.

• Strategy21
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• 통권31호
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• pp.5-26
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• 2013

The South Korean society has experienced many changes since the sinking of ROKS Cheonan. The government reviewed its defense posture and adopted the 5·24 Measure in its relations with North Korea. As a result, the people of South Korea became more conscious of security situations on the Korean peninsula while North Korea's economy suffered badly. Meanwhile, the South Korean government has taken a flexible stance toward North Korea in terms of exchange and cooperation since September 2011. The flexible stance was to manage inter-Korea relations in a stable manner and relieve the hardships of the North Korean people while preserving the spirits and purposes of the 5·24 Measure. The UN Security Council adopted twenty-six resolutions and statements on North Korea since June 25, 1950. They include thirteen U.N. Security Council resolutions including those concerning nuclear weapons or missile programs, nine Presidential statements, and four press statements. Resolution 82, the first U.N. resolution on North Korea, came when the Korean War broke out. Resolution 825, the first one related to nuclear or missile programs, was adopted in response to North Korea's withdrawal from the NPT. Apart from these U.N. resolutions, the United States has imposed separate sanctions against North Korea. North Korea's nuclear weapons program can be considered in comparison with that of Iran in terms of the consequences they create for the regional security. The Security Council has adopted six resolutions on Iran so far. One should note that the resolutions on Iran have had much stronger sanctions compared to those imposed on North Korea. That is, while the North Korea case may be viewed as a more serious threat to international security from the perspective of nuclear weapons development or proliferation, tougher sanctions have been placed on Iran. There are two approaches that South Korea should take in addressing the related issues. First, we should aim to reduce the gap between sanctions imposed on Iran and North Korea. It is difficult to understand that a country with more serious problems is rewarded with lighter sanctions. We should take measures through the Security Council Sanctions Committee to make individuals and groups in North Korea that play a central role in developing nuclear weapons and missiles subject to additional sanctions. Second, we have to change. Other countries in the international community have become tired of North Korea's nuclear issue and now they look to South Korea for initiative. We should correctly understand this current situation and play a leading role within our capacity. Knowingly and unknowingly, the notion that the North Korean nuclear issue may be left to South Korea has been spread around the international community. Although the situation is grave, we should try to open a new horizon in ushering in the unification era by taking the initiative with confidence that there is a looming hope ahead of us. For these tasks, we should stop thinking in the old way that has been ossified for the last two decades. We should not be pushed around by neighboring great powers in dealing with North Korea related issues anymore; we should take the initiative with resolution that we will play our role at the center of four great powers and with confidence that we can do it. Based on the confidence that the Republic of Korea has become a country with enough capacity to take the initiative, we should establish a 'National Grand Strategy' representing South Korea's strategic vision that the unification is the ultimate solution to the problems related to North Korea's nuclear weapons program.

• 한국의류학회지
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• 제32권7호
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• pp.1065-1074
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• 2008

The purpose of this paper was to present the proximity of clothing to self(PCS) which is a subjective measure developed by Sontag and Lee(2004). PCS is the scale to examine the relationship between self and clothing. Since PCS scale was prepared for American consumers, it is necessary to verify the validity as a measure to Korean consumers. Consumers' quality of life are functionally related to satisfaction with all of life's domain and subdomains. Clothing in life facilitates the creativity and expressiveness to the wearer, especially to adolescent. The concept of bottom-up spillover effect developed by Lee et al.(2002) was adopted as research model. Data were gathered by surveying university students using convenient sampling, 419 questionnaires were used in the statistical analysis. It was proved that PCS scale was effective measure to Korean consumers. And also PCS scale could be a proxy indicator in view of the fact that clothing was deeply related to consumers' quality of life.

• 한국자기학회지
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• 제23권2호
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• pp.62-67
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• 2013

본 논문에서는 전자기 관련 제품의 효율적인 신뢰도 기반 최적설계를 위해 확률구속조건을 평가하는 기법으로 해의 안정성과 효율성이 우수한 목표 성능치법을 제시 하였다. 목표 성능치법을 적용한 신뢰도 기반 최적설계의 효율성 검증을 위하여 스피커 모델과 초전도 자기에너지 저장장치 모델에 대한 최적설계를 수행하였고, 이를 기존 신뢰도 지수법을 적용한 최적설계 결과와 비교하였다. 또한 몬테카를로 수치모사기법을 이용하여 도출된 최적해의 신뢰도를 재 계산 후 비교함으로써 제안된 기법의 신뢰도 평가 결과의 정밀도를 검증하였다.

• 정보처리학회논문지B
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• 제16B권2호
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• pp.141-150
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• 2009

본 논문에서는 사람의 노랫소리를 자동으로 채보할 수 있는 시스템을 제안한다. 먼저 입력된 음성으로부터 추출된 피치 정보를 안정화된 역확산 방정식(Stabilized Inverse Diffusion Equation : SIDE)을 이용하여 음절 단위로 분할한다. 이를 바탕으로 유전자 알고리즘에 기반한 클러스터링을 통해 음길이 인식을 수행하였다. 또한 시창자의 음 높이에 강인한 음정 인식을 위하여 상대 음정이라는 개념을 도입하였다. 그리고 휴지기 정보를 이용한 마디 추출 알고리즘을 적용하여 보다 정확한 노래의 채보를 가능하게 하였다. 제안된 시스템을 통하여 동요 16곡을 채보한 결과 마디 인식률은 91.5%였으며, DMOS 방법으로 측정한 악곡 전체 유사도는 3.82로써 시스템 성능의 유효성을 확인할 수 있었다.

• Nuclear Engineering and Technology
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• 제56권1호
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• pp.328-334
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• 2024

The activation method of metallic foils is an important technique to measure the flux and energy of proton beams. In this paper, the method was used to measure the CSNS APEP proton flux at seven nominal proton energies ranging from 10 MeV to 70 MeV for beam spot sizes of the 20 mm × 20 mm and 50 mm × 50 mm. The reactions of ^natTi(p, x)⁴⁸V, ^natNi(p, x)⁵⁷Ni, ^natCu(p, x)⁵⁸Co, and ²⁷Al(p, x)²⁴Na were employed to measure the proton beam flux with a range of 10⁷-10⁹ p/cm²/s. Furthermore, we also proposed a method using the activity ratio with a stacked-foil target to determine the energy spread of a Gaussian-like distribution for different nominal proton energies. The optimal combinations of Al, Cu, Ti, Ni, Mo, Fe, Nb, and In foils were adopted for the proton energies. The measured energy spreads for degraded beams of 30 MeV-70 MeV were found to be smaller than 10.00%.

• 대한교통학회지
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• 제29권3호
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• pp.123-137
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• 2011

지금까지 교통류의 전파현상은 밀도와 교통량의 변화에 따른 충격파 이론을 사용하여 설명되어져 왔으나 서로 다른 차로간 교통류 전파와 같은 이질적인 교통류를 해석하기위해 적용하기에는 한계가 있다. 따라서, 본 연구는 고속 도로의 항공사진자료를 분석함으로써 합류부 구간과 엇갈림 구간, 기본구간의 교통류 전파특성을 시공간적으로 분석하고 차로간 교통류 전파해석을 위한 충격량 전파모형을 개발하는 것을 목적으로 한다. 본 연구에서는 기존에 사용하던 충격파 속도라는 척도를 이용하여 교통류 전파특성을 분석하고자 하였으나 전파특성에 대한 분명한 특징을 찾기가 어려웠고, 이러한 이유로 충격량이라는 새로운 척도를 개발하여 개발된 척도로 교통류 상태를 해석하고 적용하여 각 분석구간의 충격량 특성을 분석할 수 있었다. 분석된 3개 구간은 충격량의 특성이 공통적으로 발생하여 교통류 전파시 의미있는 임계치를 도출하였고, 차로간의 상호관계를 설명할 수 있는 요인을 파악하고 분석구간과 차로에 따라 다중회귀분석을 수행하여 충격량을 결정하는 차로간 충격량 전파모형을 개발하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.132-137
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• 2004

On-Board Diagnostic(OBD) systems are in most cars and light trucks on the load today. During the 1970's and early 1980's manufacturers started using electronic means to control engine functions and diagnose engine problems. The CARB's diagnostic requirements to meet EPA emission standards have been designated as OBD with a goal of monitoring all of the emissions-related components, as well as the chassis, body, accessory devices and the diagnostic control network of the vehicle for proper operation. In this paper, we present a remote measurement system for the wireless monitoring of diagnosis signal and sensors output signals of ECU adopted KWP2000, united the OBD communication protocol, on OBD-compliant vehicle using the wirless communication technique of Bluetooth. In order to measure the ECU signals, the interface circuit is designed to communicate ECU and designed terminal wirelessly according to the ISO, SAE regulation of communication protocol standard. A microprocessor S3C3410X is used for communicating ECU signals. The embedded system's software is programmed to measure the ECU signals using the ARM compiler and ANCI C based on MicroC/OS kernel to communicate between bluetooth modules using bluetooth stack. The diagnostic system is developed using Visual C++ MFC and protocol stack of bluetooth for Windows environment. The self-diagnosis and sensor output signals of ECU is able to monitor using PC with bluetooth board connected in serial port of PC. The algorithms for measuring the ECU sensor output and self-diagnostic signals are verified to monitor ECU state. At the same time, the information to fix the vehicle's problem can be shown on the developed monitoring software. The possibility for remote measurement of self-diagnosis and sensor signals of ECU adopted KWP2000 in embedded system verified through the developed systems and algorithms.

• 한국세라믹학회지
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• 제39권11호
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• pp.1048-1054
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• 2002

가소성 소지를 이용하여 세라믹을 성형하는 경우에 소지의 가소성 평가뿐만 아니라 이를 범위 내에서 제어하기 위하여도 가소성을 정량적으로 시험할 필요가 있다. 비록 많은 가소성 측정 장치들이 소개되기는 하였으나, 간편하게 정량적으로 측정할 수 있는 장치는 아직 없다. 본 연구에서는 바이카 침을 변형하여 허니컴 압출성형용 소지의 가소성을 간편하게 정량적으로 비교할 수 있는 장치를 만들었다. 이 장치를 사용하여 3가지 소지의 가소성을 조사하였다. 변형에 대한 저항의 측정에는 직경 2 mm 원주형 침을 사용하였고, 균열이 일어나기 전까지의 변형 량의 측정에는 직경 9.5 mm 구형의 침을 사용하였다. 측정결과 이 소지들의 가소성을 정량적으로 구분할 수 있었으며, 작업성을 평가하는데 유용하였다. 만약 적당한 직경의 원주형 및 구형의 침을 선택한다면 이 장치로 다양한 세라믹 소지의 가소성을 평가할 수 있을 것으로 보인다.