• 한국지구물리탐사학회:학술대회논문집
• /
• 2007.06a
• /
• pp.273-278
• /
• 2007

2-D MT surveys at the Century mine in Australia have been performed with very far remote reference in Esashi, Japan as well as Gregory Downs, which are roughly 6400 km and 80 km apart from the field site, respectively. Long period pulsations observed in this survey generally showed dominant $H_x$ polarization than $H_y$; $H_x$ component is more than 3 times stronger than $H_y$ component. Polarity reversal in magnetic field pointing east ($H_y$ component) has also been observed in long period pulsations, while $H_x$ component remain coherent between the hemispheres. Though $H_x$ component shows relatively good coherency than $H_y$ component between the hemispheres at frequencies lower than 0.01 Hz, it seems rather too far to be used as a remote reference for ordinary MT frequency band.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2010.07a
• /
• pp.449-452
• /
• 2010

이 연구는 컴퓨터 포인팅 게임이 중도(重度) 지적장애아동의 시지각 능력에 미치는 효과를 알아보는데 목적이 있다. 이를 위해, 시지각 능력에 효과적인 컴퓨터 포인팅 게임을 난이도 수준에 따라 3단계로 설계 및 개발하였다. 효과를 최대로 이끌기 위해, 1, 2주와 3주에 적용할 교수 학습 모형을 다르게 설계하였다. 그 효과를 알아보기 위해, 성남의 지적장애 H학교 초등부 재학생 중, 중도 지적장애아동이면서 낮은 시지각 능력을 보이지만, 교정시력과 손가락 사용에 어려움이 없는 4명의 아동을 대상으로 3주간 1회에 15분씩, 15회 실험을 실시하였다. 양적인 평가를 위해, 표준화 검사 도구인 한국판 시지각 발달검사(K-DTVP-2)를 4차에 걸쳐 진행하였고, 질적 평가를 위해, 관찰평가일지를 매주 실험이 끝난 후 작성하였다. 연구결과, 컴퓨터 포인팅 게임은 지적장애아동의 시지각 능력을 양적 질적 측면에서 향상시키는 것으로 나타났다.

• Bulletin of the Korean Space Science Society
• /
• 2004.10b
• /
• pp.376-379
• /
• 2004

Operational orbit determination (OOD) depends on the capability of generating accurate prediction of spacecraft ephemeris in a short period. The predicted ephemeris is used in the operations such as instrument pointing and orbit maneuvers. In this study the orbit prediction problem consists of the estimating diverse arc length orbit using GPS navigation data, the predicted orbit for the next 48 hours, and the fitted 30-hour arc length orbits of double differenced GPS measurements for the predicted 48-hour period. For 24-hour orbit arc length, the predicted orbit difference from truth orbit was 205 meters due to the along-track error. The main error sources for the orbit prediction of the Low Earth Orbiter (LEO) satellite are solar pressure and atmosphere density.

• Environmental Engineering Research
• /
• v.21 no.1
• /
• pp.74-83
• /
• 2016

The purpose of this study is to identify the driven factors affecting the changes in energy-related $CO_2$ emissions in Hebei Province of China from 1995 to 2013. This study confirmed that energy-related $CO_2$ emissions are correlated with the population, urbanization level, economic development degree, industry structure, foreign trade degree, technology level and energy proportion through an improved STIRPAT model. A reasonable and more reliable outcome of STIRPAT model can be obtained with the introducing of the Ridge Regression, which shows that population is the most important factor for $CO_2$ emissions in Hebei with the coefficient 2.4528. Rely on these discussions about affect abilities of each driven factors, we conclude several proposals to arrive targets for reductions in Hebei's energy-related $CO_2$ emissions. The method improved and relative policy advance improved pointing at empirical results also can be applied by other province to make study about driven factors of the growth of carbon emissions.

• ETRI Journal
• /
• v.33 no.3
• /
• pp.415-422
• /
• 2011

In this paper, we present a novel vision-based method of recognizing finger actions for use in electronic appliance interfaces. Human skin is first detected by color and consecutive motion information. Then, fingertips are detected by a novel scale-invariant angle detection based on a variable k-cosine. Fingertip tracking is implemented by detected region-based tracking. By analyzing the contour of the tracked fingertip, fingertip parameters, such as position, thickness, and direction, are calculated. Finger actions, such as moving, clicking, and pointing, are recognized by analyzing these fingertip parameters. Experimental results show that the proposed angle detection can correctly detect fingertips, and that the recognized actions can be used for the interface with electronic appliances.

• Journal of architectural history
• /
• v.25 no.6
• /
• pp.27-34
• /
• 2016

There were lots of changes of the wooden structure in the middle of Joseon Dynasty. It was the time of replacement from Jusimpo (simple bracket system) to Ikgong (wing-like bracket system) and each bracket had shown mutual variation as well as itself. The aspects of change were discovered that the decorative elements of Ikgong and Dapo (multi-bracket system) had accepted from each other. It was clearly shown that not only the Ungung (carved cloud-shape) and Chotgaji (shape of the acuminate leaf) of Ikgong had affected to Dapo, but also Gaang (pseudo-pointing cantilever) of Dapo had affected to Ikgong. It was mostly found in the Buddhist architecture because there was the conservatization of ruling hierarchy as well as the active growth of Buddhist society.

• Korean Journal of Childcare and Education
• /
• v.13 no.2
• /
• pp.133-147
• /
• 2017

Objective: The purpose of this study was to examine the differences between mothers' and grand mothers' picture book reading behavior with children of ages 2 and 4. Methods: Participants were twenty 2 year olds and their mothers/grandmothers as well as twenty 4 year olds and their mothers/grandmothers. Forty pairs of children/mothers and children/grandmothers, respectively, were videotaped as they shared reading a picture book together. Data were analyzed with descriptive statistics, mean, standard deviation, and two-way ANOVA test. Results: Results indicated that mothers' and grandmothers' picture book reading behaviors were significantly different in verbal behavior. Mothers performed more explanation and questioning, while grandmothers performed more limitation, directing, and correcting. As far as non-verbal behavior is concerned, mothers used more physicalgestures, pointing, descriptive gestures, and imitative gestures, whereas grandmothers requested certain actions. Conclusion/Implications: These findings have implications for the importance of the mothers'/grandmothers' roles in shared picture book reading with the child.

• Journal of the Korean Institute of Telematics and Electronics D
• /
• v.34D no.6
• /
• pp.75-82
• /
• 1997

Today's wireless communication needs the super-high speed for picture transmission as well as voice. The optical communication with the very wide bandwidth is suitable for this demand. To fulfill the optical wireless communication, however, the atmospheric attenuation in rainy weather condition must be overcome. In the optical satellite up-link communication between geo-satellite and earth station, the factors of attenuation are turbulence, pointing error, scattering, and so on. The most serious factor for these is the scattering by rain. Under the weather conditiion of rain and cloud, in this paper, the atmospheic attenuation which affects the optical satellite up-link communication was considered, and the optimum idameter of the optical satellite transmitting antenna in the earth station versus elevation angles, data rates and rainfall rates was presented.

• The Bulletin of The Korean Astronomical Society
• /
• v.39 no.1
• /
• pp.56.1-56.1
• /
• 2014

With the advent of high-resolution high-sensitivity observations, spiral patterns have been revealed around several asymptotic giant branch (AGB) stars. Such patterns can provide possible evidence for the existence of central binary stars embedded in outflowing circumstellar envelopes. It is, however, not generally recognized that the binary induced pattern, vertically extended from the orbital plane, exhibits a ring-like pattern with an inclined viewing angle. I will first review the binary-induced spiral-shell patterns on the AGB circumstellar envelopes with the effect of inclination angle with respect to the orbital plane, of which large inclination cases reveal incomplete ring-like patterns. I will describe a method of extracting such spiral-shell from the gas kinematics of an incomplete ring-like pattern to place constraints on the characteristics of the (unknown) central binary stars. This first success may open the possibility of connecting the ring-like patterns commonly found in the AGB circumstellar envelopes and in the outer parts of (pre-)planetary nebulae and pointing to the conceivable presence of central binary systems, which may give a clue for the onset of asymmetrical planetary nebulae.

• Journal of the Korean Geographical Society
• /
• v.33 no.3
• /
• pp.411-433
• /
• 1998

This paper examines how Nietzsche, criticizing anti-naturalist philosophies, reformulated concepts of nature and human nature, and revaluated them from the perspective of naturalism. Especially, it focuses on his task for naturalistic ethics to naturalize nature and to place man back into nature. This paper also tries to reinterpret his attempt to transfer the concept of justice from the metaphysical realm to the naturalistic one, which seems to give some important insights to develop theory of environmental justice, while pointing out some limitations in his naturalistic concept of justice.