• 한국지리정보학회지
• /
• 제16권3호
• /
• pp.147-163
• /
• 2013

본 연구의 목적은 3 가지 보간 방법으로 생산한 남한 강수 자료에서 강수 분포의 차이를 비교하는 것이다. 보간된 강수 자료를 생태환경모델링, 수문모델링, 기후변화 영향평가 등의 연구에서 이용할 때 보간 방법에 따른 강수량의 차이는 중요한 정보이기 때문이다. 연구에는 기후변화정보센터에서 PRISM(Precipitation-elevation Regressions on Independent Slopes Model)으로 작성한 강수 자료와 본 연구에서 공동크리깅과 역거리가중법으로 작성한 강수 자료가 사용되었다. 보간된 강수 자료의 공간해상도는 1km이다. 보간 방법 선택에 의해 발생하는 강수량의 차이는 대체로 산지 유역의 자료에서 크다. 특히 군사분계선 주변과 소백산, 월악산, 덕유산, 지리산, 태백산지의 강수 자료에서 보간 방법의 차이에 따라 발생하는 월강수량의 차이는 약 10~20%, 또는 그 이상이었다. 이는 이 지역의 연구에 보간된 강수 자료를 이용할 때 연구에 채택한 보간 방법에 따라 최종 결과가 큰 영향을 받을 수 있다는 것을 의미한다.

• 한국진공학회지
• /
• 제10권2호
• /
• pp.145-154
• /
• 2001

조정독립성을 갖춘 새로운 형식의 조립식 거울조정기가 포항가속기연구소에서 건설중인 EPU6 빔라인용으로 개발되었다. 새로이 고안된 구형관절의 회전 중심에 거울면 중심을 위치시켜, roll 및 pitch의 회전변위가 병진변위를 인가하지 않고 서로 독립적이도록 설계하였다. 거울조정기의 roll 및 pitch 마이크로메터를 조정하면서 중력기준형 각도기를 이용하여 임시거울의 회전각을 5 $\mu$rad의 정밀도로 측정하였다. 분해능의 설계치는 3.937 $\mu$rad/$\mu\textrm{m}$인데, 측정된 분해능은 roll 회전에 대해서 3.94 $\mu$rad/$\mu\textrm{m}$이었고 pitch 회전에 대해서는 3.85 $\mu$rad/$\mu\textrm{m}$이었다. pitch 각도에 대한 roll 회전의 영향은 -3.18%, roll 각도에 대한 pitch 회전의 영향은 -5.21%로 측정되었다. 본 거울조정기의 설계는 조정 독립성과 표준화에 중점을 두고 이루어짐으로써, 다종의 거울에 대한 거울조정기의 개발기간 단축과 설계비용 절감뿐만아니라 거울조정기의 제작, 설치 및 조정의 용이성을 도모할 수 있다.

• 전기전자학회논문지
• /
• 제13권4호
• /
• pp.9-14
• /
• 2009

이 논문에서는 혼성 신호 집적회로 상의 온칩 전원전압 잡음을 측정하는 회로에 대해 기술하였다. 온칩 상의 전원전압 잡음을 측정함으로서 잡음이 아날로그 회로에 미치는 영향을 확인하고 이를 보상하는 정보로도 사용할 수 있다. 이 회로는 동일하지만 독립적인 두 개의 채널로 구성되어 있다. 각 채널은 샘플 앤 홀드와 전압 제어 발진기를 포함한 주파수-디지털 변환 블록으로 구성되어 있다. 간단한 아날로그-디지털 변환 방법을 사용해서 시간 기준 전압 정보와 주파수 기준 전력 스펙트럼 밀도를 얻을 수 있다. 버퍼는 넓은 대역폭을 갖는 유닛 게인 버퍼로 동작하고, 전압 제어 발진기는 해상도를 높이기 위한 높은 증폭도를 가지고 있다. 이 회로는 0.18um CMOS 공정으로 설계되었으며 측정된 해상도는 2.06mV/count 이다. 전원잡음 측정회로는 15mW의 전력을 소모하며 $0.768mm^2$의 면적을 차지한다.

• 한국중재학회지:중재연구
• /
• 제28권1호
• /
• pp.43-75
• /
• 2018

The Court of Arbitration for Sport (CAS) was created to focus on the procedural complexity in the resolution of sports-related disputes, confidentiality, the matter of expenses, and the necessity of prompt settlement in the field of international sports. The CAS had originally launched as one of bodies of International Olympic Committee (IOC), but later it became properly operational as an independent organization to facilitate sports-related disputes when the International Council of Arbitration for Sport (ICAS), which came into force in accordance with the Paris Agreement in 1984 and has acted in place of IOC, took responsibility for the administration and financing of the CAS. The CAS is composed of four divisions, the Ordinary Arbitration Division and the Appeals Arbitration Division, the Ad hoc Division created later in 1996 and the CAS Anti-Doping Division (CAS ADD) established as from 2016 only to conduct proceedings and to issue decisions on an alleged anti-doping rule violation, and two (Sydney and New York) permanent decentralized offices. The head office of the CAS is Lausanne, Switzerland. Since CAS ADD was established, CAS Ad hoc Division has had jurisdiction over the appeal case against a decision pronounced by the IOC, an NOC, an international Federation or an Organizing Committee for the Olympic Games. Although there are so many virtues of CAS as a resolution authority for sports-related disputes in terms of its organization, arbitration rules and procedures, it is also true that the CAS has not been showing the consistency. The CAS should overcome these issues through much more advanced system and its instant and fair decisions.

• 무역상무연구
• /
• 제68권
• /
• pp.123-148
• /
• 2015

Central Asian Countries had been independent in 1991 from USSR. Since then it have been increasing foreign trade and investment amount with outside countries including China, Japan, EU and South Korea. Korean enterprises and entities have endeavored to secure plentiful natural resources, oil and gas energy and expand the market share to exporting the consuming and industrial competitive goods and services for those countries. In the case of disputes of commercial transactions and investment, arbitration is regarded as a dispute resolution system which has been preferred in international transactions and investments by the business world. Since the collapse of the USSR, Central Asian Countries have worked to modernize its arbitration law and procedure to conform with international standard rules. Arbitral legislation in Central Asian countries is based on the Model Law as adopted in 1985. However, CIS's legislation systems of arbitration are not satisfied with the international standard in national laws and practices. That is the reason to consider for the specific parliament about arbitration for the dispute resolutions in the commercial transaction and investment between Korean enterprises and CIS. In this article, it is discuss problems and its alternatives in the dispute resolution about the commercial transaction and investment into Central Asian countries including the tendency to the increasing the trade volumes of goods and investment between South Korea and CIS. According to this article, South Korea consider the long term strategy followed the preferred economic relative partnership for business success on commercial transaction and investment with the Central Asian Countries.

• 한국정보시스템학회지:정보시스템연구
• /
• 제21권3호
• /
• pp.71-97
• /
• 2012

There has been an upward trend in smartphone sales in Korea as well as the rest of the world. Even though smartphones are now at the peak of their popularity, the fact that they are somewhat limited in terms of their usages for certain purposes is unexpected. Precisely, compared to PC, smartphones typically have smaller display screens with a lower resolution, which make them difficult to use in general. For instance, when customers search the information about products in mobile shopping malls, due to the smaller screen with a low resolution smartphone users may realize that it is not easy and convenient not only to search the information, but also to read the information they found in the shopping malls. This restriction could become one of reasons that lowers the perceived quality of information in the shopping malls, which in turn leads to the reluctance to use the shopping malls. A comprehensive information systems (IS) literature review found that there has been little empirical evidence on perceived information quality that affects smartphone users' intention to use mobile shopping malls. The purposes of this study is to examine 1) the effects of perceived information quality on smartphone users' intention to use mobile shopping malls and 2) the relationships among behavioral beliefs in the middle of independent and dependent variables, such as information satisfaction, perceived usefulness, and customers' attitude toward mobile shopping. A survey was conducted in March 2012. College students and practitioners took participated in the survey. Structural Equation Modeling(SEM) was used for all data analysis. The results found that there is a strong relationship between perceived information quality and smartphone users' intention to use mobile shopping malls. In addition, this study also showed that there are strong relationships among behavioral beliefs. Further research is expected to validate the findings of this study and apply them in specific contexts.

• International Journal of Aeronautical and Space Sciences
• /
• 제17권1호
• /
• pp.37-44
• /
• 2016

Optical fiber temperature sensing systems have incomparable advantages over traditional electrical-cable-based monitoring systems. However, the fiber optic interrogators and sensors have often been rejected as a temperature monitoring technology in real-world industrial applications because of high cost and over-specification. This study proposes a multiplexed fiber optic temperature monitoring sensor system using an economical Optical Time-Domain Reflectometer (OTDR) and Hard-Polymer-Clad Fiber (HPCF). HPCF is a special optical fiber in which a hard polymer cladding made of fluoroacrylate acts as a protective coating for an inner silica core. An OTDR is an optical loss measurement system that provides optical loss and event distance measurement in real time. A temperature sensor array with the five sensor nodes at 10-m interval was economically and quickly made by locally stripping HPCF clad through photo-thermal and photo-chemical processes using a continuous/pulse hybrid-mode laser. The exposed cores created backscattering signals in the OTDR attenuation trace. It was demonstrated that the backscattering peaks were independently sensitive to temperature variation. Since the 1.5-mm-long exposed core showed a 5-m-wide backscattering peak, the OTDR with a spatial resolution of 40 mm allows for making a sensor node at every 5 m for independent multiplexing. The performance of the sensor node included an operating range of up to $120^{\circ}C$, a resolution of $0.59^{\circ}C$, and a temperature sensitivity of $-0.00967dB/^{\circ}C$. Temperature monitoring errors in the environment tests stood at $0.76^{\circ}C$ and $0.36^{\circ}C$ under the temperature variation of the unstrapped fiber region and the vibration of the sensor node. The small sensitivities to the environment and the economic feasibility of the highly multiplexed HPCF temperature monitoring sensor system will be important advantages for use as system-integrated temperature sensors.

• 대한원격탐사학회지
• /
• 제28권3호
• /
• pp.319-327
• /
• 2012

In this paper, we introduce a newly developed photogrammetric software for automatic generation of high quality geo-products and its performance assessment carried out using various satellite images. Our newly developed software provides the latest techniques of an optimized sensor modelling, ortho-image generation and automated Digital Elevation Model (DEM) generation for diverse remote sensing images. In particular, images from dual- and multi-sensor images can be integrated for 3D mapping. This can be a novel innovation toward a wider applicability of remote sensing data, since 3D mapping has been limited within only single-sensor so far. We used Kompsat-2, Ikonos, QuickBird, Spot-5 high resolution satellite images to test an accuracy of 3D points and ortho-image generated by the software. Outputs were assessed by comparing reliable reference data. From various sensor combinations 3D mapping were implemented and their accuracy was evaluated using independent check points. Model accuracy of 1~2 pixels or better was achieved regardless of sensor combination type. The high resolution ortho-image results are consistent with the reference map on a scale of 1:5,000 after being rectified by the software and an accuracy of 1~2 pixels could be achieved through quantitative assessment. The developed software offers efficient critical geo-processing modules of various remote sensing images and it is expected that the software can be widely used to meet the demand on the high-quality geo products.

• 한국측량학회지
• /
• 제15권1호
• /
• pp.51-61
• /
• 1997

전지구 해양의 조석 분포를 파악하기 위해 $1/3^\circ$의 분해능을 갖는 2차원 수치모형을 수립하여 반일분조$(M_2,\;S_2,\;K_2,\;N_2)$ 및 일분조$(K_1,\;O_1,\;P_1,\;Q_1)$의 조석도를 작성하였다. 수립된 $1/3^\circ$ 수치모형은 기존 수치모형에서 낮은 분해능으로 인하여 평가하지 못하였던 천해역 및 육붕해에서의 조석현상을 평가하는데 적용되었다 작성된 조석도는 기존의 수치모형 및 위성 고도계 자료로부터 작성된 조석도와 또, 심해의 일부 지역에서 관측된 조화상수와 상호 비교하였다. 세격자망에 의해 계산된 전지구 해양의 조석도는 위성을 통해 관측된 순간 해면 자료로부터 조석성분을 제거하여 시간에 따라 변화하지 않는 해면변위를 산정하는데 있어 유용한 자료로 이용될 수 있다.

• 한국항행학회논문지
• /
• 제21권2호
• /
• pp.163-170
• /
• 2017

독립 협동형 감시시스템인 이차감시레이더(SSR)의 위치 정보의 해상도를 높이기 위해 다변측정감시시스템(MLAT)이 항공 감시시스템에 적용되고 있다. 다변측정감시시스템은 쌍곡선(hyperbola) 또는 쌍곡면(hyperboloid) 위치 측정법을 이용하는 시스템으로 4개 이상의 지상 수신기에서 TOA (time of arrival)값을 측정하고 이를 중앙처리장치에서 각 수신기 상호간의 수신시각차 (TDOA; time difference of arrival)를 이용하여 항공기의 위치를 계산한다. TDOA (time difference of arrival) 알고리즘을 이용하는 다변측정감시시스템의 위치 측정 해상도를 높이기 위해서는 먼저 항공기에 탑재된 트랜스폰더에서 송출된 신호가 수신기에 수신되는 시간인 TOA(time of arrival)를 정밀하게 측정하여야 한다. 본 논문에서는 다변측정감시시스템의 구성에 대해 간략히 설명하였으며 TOA를 측정하기 위한 방법 중 하나인 ATD (adaptive threshold detector)에 대하여 간략히 설명하였다. ATD는 동일 신호에 대한 수신기간 수신한 신호의 진폭 차에 의해 발생하는 펄스 위치 편차 문제를 해결하는 방식이다. 본 논문에서는 ATD의 종류 중 LAS (level adjuster System)과 CDS (constant-fraction discriminator system)에 대한 시뮬레이션 결과와 기본적인 임계값을 적용한 펄스 위치 계산 시뮬레이션 결과를 비교하여 ATD의 성능을 분석하였다.