• Journal of the Korea Institute of Military Science and Technology
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• v.11 no.6
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• pp.63-73
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• 2008

The helicopter position, heading data and the direction finding data of ESM are essentially required to compensate the parallax and analyze the direction finding accuracy of heliborne ESM in flight test phase. In the case of the long test range compared with small platform like as LYNX helicopter and Jisim Island test site, the parallax compensation for direction finding accuracy calculation and GPS position error can be neglected. In this paper, the direction finding accuracy on the basis of helicopter propeller was calculated by coordinate changing between helicopter and transmitting antenna from WGS84 coordinate to navigation coordinate using helicopter position and direction finding data.

• Journal of the Korea Institute of Military Science and Technology
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• v.10 no.3
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• pp.154-160
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• 2007

A direction finding system test-bed(DFSTB) at the electronic warfare communication-band is presented to efficiently evaluate and optimize the performance of the direction finding system through the indoor test setup. This test-bed gives a significant benefit to the designers of the direction finding system because it allows flexible test and design trade-off in the system design cycle. The system description and implementation of test-bed architecture, and the experiment results of direction finding accuracy according to modulation schemes are presented.

• Communications for Statistical Applications and Methods
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• v.22 no.5
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• pp.401-413
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• 2015

In this article, we review the statistical methods and theory for dose finding in early phase clinical trials, where the primary objective is to identify an acceptable dose for further clinical investigation. The dose finding literature is initially motivated by applications in phase I clinical trials, in which dose finding is often formulated as a percentile estimation problem. We will present some important phase I methods and give an update on new theoretical developments since a recent review by Cheung (2010), with an aim to cover a broader class of dose finding problems and to illustrate how the general dose finding theory may be applied to evaluate and improve a method. Specifically, we will illustrate theoretical techniques with some numerical results in the context of a phase I/II study that uses trinary toxicity/efficacy outcomes as basis of dose finding.

• The Journal of Information Technology
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• v.3 no.2
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• pp.49-62
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• 2000

This paper suggests the developing scheme of trade-finding site after observing the customer-finding methods, which is the most basic in trade, among all kinds of customer-finding methods by using the internet and discussing the present condition and problems of trade-finding site which is used most frequently.

• Journal of computational fluids engineering
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• v.11 no.2 s.33
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• pp.62-66
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• 2006

In this paper an automated hole-finding method for overset grids is introduced which uses recursive octree-cell division. A graphic program which enables the user to do the hole-cutting with ease is also introduced. Using this program it is found that there is an optimum combination of the level of octree division and vector calculation for the efficient and fast hole finding.

• 한국전산유체공학회:학술대회논문집
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• 2004.10a
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• pp.83-86
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• 2004

In this paper an automated hole-finding method for overset grids is introduced which uses recursive octree-cell division. A graphic program which enables the user to do the hole-cutting with ease is also introduced. Using this program it was found that a proper combination of the level of octree division and vector calculation should be used for efficient and fast hole finding.

• The Korean Journal of Health Service Management
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• v.7 no.2
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• pp.135-148
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• 2013

The aim of this study is to analyze affecting factor on the job finding stress of university students majoring occupational therapy. We collected data for 7days from 12 to 19 July, 2012. This study was surveyed 270 university students majoring occupational therapy was located in the Pusan and South Kyungnam region. It was found that mean score of the job find stress was $2.12{\pm}0.57$. There was statistically significant difference in the physical symptom, depression, anxiety and sub-domain on the job finding stress by gender, age, the economic status, region of birth, the state of employment, employment determinants, job finding stress relief, advice for job finding(p<0.05). From the multiple regression analysis, it was found that affecting factor on the job finding stress was personal characteristics, job related characteristics, stress relief characteristics, physical symptom, depression, anxiety which was statistically significant difference(p<0.05). As a result, we could know that they must relieve the physical symptom, depression and anxiety for lowering job finding stress of university student majoring occupational student.

• Journal of the Korea Institute of Military Science and Technology
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• v.17 no.4
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• pp.544-550
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• 2014

In this paper, we have proposed a novel method which can analysis the direction finding ambiguity analysis for array geometry in 3 channel and 4 channel multiple baseline direction finding system. Generally, the direction finding ambiguity in the 3 element and 4 element phase interferometer direction finding system is calculated by the simulation for the array spacing or by the probability with the selected antenna array spacing. There are some restrictions to obtain the ambiguity of direction finding system in these methods. The former performs a simulation with every antenna array spacing and the latter calculates the ambiguity with the selected antenna array spacing. To overcome those restrictions, This paper proposed the novel method to calculate the ambiguity using the imaginary antenna array spacing and the phase difference prior to the modular operation in direction finder. Using the proposed method, we obtain the ambiguity probability for each of array geometry composed of multiple baseline. After performing the simulation with the selected antenna array spacing to verify the proposed method, we compared the calculated result data with the simulation data.

• Journal of Korean Society of Archives and Records Management
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• v.7 no.2
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• pp.139-164
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• 2007

Finding aids is the first necessary step for users to find records easily. EAD, computerized standardization for finding aids, enables users to access to the finding aids easily and accelerates interoperability between Archives. This research is to review the domestic and foreign archives where they have built EAD finding aids and to analyze the distinctive feature in the EAD finding aids. And to review and point out the problems in current status of finding aids in domestic university archives. And the solution for the problem is presented in this research.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.30 no.4
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• pp.290-299
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• 2019

Direction-finding equipment with multiple antennas are used to estimate the direction of a signal emitted by a source; they can be used to rescue a victim or locate a specified source. During direction finding, reflection waves are present and signal distortion is observed depending on the external shape and material of a system that incorporates the direction-finding equipment and multiple antennas. Therefore, to accurately estimate the azimuth of the signal source and develop the direction-finding equipment, a calibration should be performed to reflect the influence of the antenna arrangement(layout) and system contour. In this paper, we describe an in-flight calibration method to develop direction-finding equipment to locate communication signals using an aviation system, and we analyze the direction-finding performance when applying phase calibration data obtained through the in-flight calibration.