• Title, Summary, Keyword: 극한지

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Group Music Therapy Involving Creation of a Musical Play to Improve Self-Esteem, Self-Expression, and Social Skills in Children (음악극 창작활동이 지역아동센터 아동의 자아존중감, 자기표현력, 사회성에 미치는 영향)

  • Bae, Sungjin;Kim, Kyungsuk
    • Journal of Music and Human Behavior
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    • v.17 no.1
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    • pp.51-70
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    • 2020
  • The purpose of this study was to examine the effects of group music therapy involving the creation of a musical play on the self-esteem, self-expression, and social skills of children. The participants were 14 first through third graders and 14 fourth through sixth graders from a children's center. Half of the children from each grade band (Grades 1-3 and 4-6) were assigned to the experimental group and the other half to the control group, for a total of 14 children in each group. The experimental group who participated in music therapy sessions focused on creating a musical play. The experimental group selected themes, made a script, composed song lyrics and music, and performed the completed musical play. The Self-Esteem Scale, Self-Expression Scale, and Social Skills Rating System (SSRS) were administered before and after the intervention. The experimental group exhibited significantly higher scores than the control group on all of the scales except subscales of the Self-Expression scale and the SSRS. The results of this study suggest that group music therapy can facilitate children's engagement in group work and that playing an important role in the group can positively impact their perceptions of themselves.

Sintering and Creep Characteristics of the Ni-Al Alloy Anode for Molten Carbonate Fuel Cells (용융탄산염 연료전지용 Ni-Al 합금 anode의 소결 및 creep 특성)

  • Oh, In-Hwan;Han, Jae-Il;Yun, Seong Pil;Lim, Tae Hoon;Nam, Suk Woo;Ha, Heung Yong;Hong, Seong Ahn
    • Transactions of the Korean hydrogen and new energy society
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    • v.13 no.1
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    • pp.24-33
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    • 2002
  • 기존 Ni-10w/o Cr 연료극과 성능은 대등하면서 creep 저항성이 뛰어난 연료극을 제조하기 위하여 Ni-5w/o Al 합금 연료극의 제조 공정을 연구하였다. 소성 분위기에 따라 완전산화 방법과 부분산화 방법으로 나누어 제조된 전극들의 미세구조 변화를 관찰하였으며, 실험 결과 부분산화 방법으로 제조한 Ni-5w/o Al 합금 연료극이 가장 우수한 소결 및 creep 저항성을 나타내었다. 이는 연료극이 산화물 분산강화 구조를 갖기 때문으로 부분산화 방법으로 제조한 Ni-5w/o Al 합금 연료극을 장착한 단전지의 경우 기계적 안정성 및 전극 안정성이 향상되었다.

Comparison on the Dosimetry of TLD and OSLD Used in Nuclear Medicine (광자극발광선량계와 열형광선량계를 이용한 핵의학과 선량 측정비교)

  • Lee, Wang-Hui;Kim, Sung-Chul;Ahn, Sung-Min
    • The Journal of the Korea Contents Association
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    • v.12 no.12
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    • pp.329-334
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    • 2012
  • For the dosimetry of the radiation workers, film badge, Thermo Luminescent Dosimeter (TLD), and glass dosimeter are being used and recently, there is a growing trend of using Optically Stimulated Luminescence Dosimeter (OSLD) in the world. However, OSLD is only being applied some of the field in Korea and there has been almost no study made related to OSLD. Thus, the accumulated radiation dose of TLD and OSLD that have been most frequently used in the field was compared in the radiation workers of nuclear medicine and their working areasfor 3 months. As a result, the average surface dose showed 0.85 mSv difference with 1.27 mSv for TLD and 2.12 mSv for OSLD while having 0.73 mSv difference for the average depth dose with 1.33 mSv for TLD and 2.06 mSv for OSLD. The surface dose and depth dose of OSLD showed statistically significant result with higher measurement (p<0.05).

A Study on the characteristic analysis and optimization according to Ballast design of Induction Lamp (고출력 무전극램프의 점등회로 설계를 통한 특성분석 및 최적화에 관한 연구)

  • Chung, Young-Il;Jung, Dae-Chul;Park, Dae-Hee;Kim, Yong-Kab
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.10 no.1
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    • pp.31-37
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    • 2017
  • In this paper, we implemented for the development of a high output induction lamp system, which lamp design is optimized by gas type, mixing ratio, pressure and discharge tube size, amalgam type and mixing ratio, and characteristics of ferrite core in the lamp. It's the circuit design by improving the power factor and efficiency according to the driving method, which has analyzing the characteristics according to the waveform and frequency. Finally, luminaries design part for applying the optimal lighting system considering the surrounding environment, the characteristics of the lighting circuit for electrodeless lamp has analyzed and the improvement has been proceeded. In conclusion, the driving frequency has optimized at 135kHz with degrading $7{\sim}10^{\circ}C$ based on the results of the optical characteristics of the induction lamp on peak noise FET(Q3,Q4) damage.

Study of the Characteristic and Optimization of Induction Lamp according to Gas Pressure and Amalgam Type (고출력 무전극램프의 가스압 및 아말감종류에 따른 특성분석 및 최적화에 관한 연구)

  • Chung, Young-Il;Jung, Dae-Chul;Kim, Yong-Kab;Park, Dae-Hee
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.10 no.1
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    • pp.23-30
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    • 2017
  • Currently, road lightings are installed with less than 400W of existing metal halide lamps. These road lightings are being replaced by energy-saving lightings. Induction lamps are expected to be more actively replaced with targets for tunnel lighting and high ceiling lighting. Therefore, it is necessary to develop high efficiency, high power induction lamps system. In this study, the gas type & pressure, amalgam type were designed for the high power of the induction lamps. And induction lamp system was optimized through electrical, optical characteristics analysis. It is optimized to the gas pressure 300~350 [mmHg] for the discharge tube of high power induction lamp and ferrite core. The driving circuit matching was completed with a induction lamp using indium amalgam. The rated power consumption of the induction lamp was optimized with 250 W (rated ${\pm}10%$)

Spatial Distribution of Macropore Flow Percentage and Macroporosities in the Gwangneung Forest Catchment (광릉 산림 소유역에서의 대공극흐름율과 유효대공극부피분율의 공간 분포)

  • Gwak, Yong-Seok;Kim, Su-Jin;Kim, Joon;Lim, Jong-Hwan;Kim, Sang-Hyun
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.9 no.4
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    • pp.234-246
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    • 2007
  • The role of macropore in the hydrological processes is important at the hillslope scale. Developments and distribution of macropores have not been investigated in conjunction with the characteristics of the hillslope such as topography, soil property, and soil moisture. In this study, macropore properties, such as macropore flow and saturation hydraulic conductivity were measured at a hillslope located in Gwangneung Research Forest, Pochun-gun, Gyeonggi-do, South Korea. An intensive field survey provided a refined Digital Elevation Model (DEM) for surface and subsurface topography. Spatial distributions of upslope area and topographic index were obtained through the digital terrain analysis. The total number of monitoring points was 22, and the selected points were distributed along the transect of the digital contour map. Vertical fluxes through macropores were measured using a tension infiltrometer at the depth of 0.1 m from the surface. Spatial and temporal distributions of soil moisture were obtained using an on-line measurement system, TRASE, installed in the study area. Soil moisture for the aforementioned points was measured at 0.1 and 0.3m depths below the surface. The results from tension infiltrometer experiments present that the macropore flows ranged between 21 and 94%, and the measured macroporosities varied from 1.4 to 47%. Macropore flows and macroporosities tended to increase as the measurement location moved to downslope. The ability for water conduction through macropores becomes increasingly developed as the location approaches the outlet of the hillslope.

The Development of Robot and Augmented Reality Based Contents and Instructional Model Supporting Childrens' Dramatic Play (로봇과 증강현실 기반의 유아 극놀이 콘텐츠 및 교수.학습 모형 개발)

  • Jo, Miheon;Han, Jeonghye;Hyun, Eunja
    • Journal of The Korean Association of Information Education
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    • v.17 no.4
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    • pp.421-432
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    • 2013
  • The purpose of this study is to develop contents and an instructional model that support children's dramatic play by integrating the robot and augmented reality technology. In order to support the dramatic play, the robot shows various facial expressions and actions, serves as a narrator and a sound manager, supports the simultaneous interaction by using the camera and recognizing the markers and children's motions, records children's activities as a photo and a video that can be used for further activities. The robot also uses a projector to allow children to directly interact with the video object. On the other hand, augmented reality offers a variety of character changes and props, and allows various effects of background and foreground. Also it allows natural interaction between the contents and children through the real-type interface, and provides the opportunities for the interaction between actors and audiences. Along with these, augmented reality provides an experience-based learning environment that induces a sensory immersion by allowing children to manipulate or choose the learning situation and experience the results. In addition, the instructional model supporting dramatic play consists of 4 stages(i.e., teachers' preparation, introducing and understanding a story, action plan and play, evaluation and wrapping up). At each stage, detailed activities to decide or proceed are suggested.

Recent Spatial and Temporal Changes in Means and Extreme Events of Temperature and Precipitation across the Republic of Korea (최근 우리나라 기온 및 강수 평균과 극한 사상의 시.공간적 변화)

  • Choi, Gwang-Yong;Kwon, Won-Tae;Boo, Kyung-On;Cha, Yu-Mi
    • Journal of the Korean Geographical Society
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    • v.43 no.5
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    • pp.681-700
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    • 2008
  • In this study, the spatial and temporal patterns of changes in means and extreme events of temperature and precipitation across the Republic of Korea over the last 35 years (1973-2007) are examined. Over the study period, meteorological winter (December-February) mean minimum (maximum) temperature has increased by $+0.54^{\circ}C$/decade ($+0.6^{\circ}C$/decade), while there have been no significant changes in meteorological summer (June-August) mean temperatures. According to analyses of upper or lower $10^{th}$ percentile-based extreme temperature indices, the annual frequency of cool nights (days) has decreased by -9.2 days/decade (-3.3 days/decade), while the annual frequency of warm nights (days) has increased by +4.9 days/decade (+6.8 days/decade). In contrast, the increase rates of summer warm nights (+8.0 days/$^{\circ}C$) and days (+6.6 days/$^{\circ}C$) relative to changes in summer means minimum and maximum temperatures means are greater than the decreasing rates of winter nights (-5.2 days/$^{\circ}C$) and days (-4.3 days/$^{\circ}C$) relative to changes in winter temperatures. These results demonstrate that seasonal and diurnal asymmetric changes in extreme temperature events have occurred. Moreover, annual total precipitation has increased by 85.5 mm/decade particularly in July and August, which led to the shift of a bimodal behavior of summer precipitation into a multi-modal structure. These changes have resulted from the intensification of heavy rainfall events above 40mm in recent decades, and spatially the statistically-significant increases in these heavy rainfall events are observed around the Taebaek mountain region.

Design of Microstrip Duplexer with Attenuation Poles (감쇠극을 갖는 마이크로스트립 듀플렉서 설계)

  • Choi, Oh-Seog;Nam, Hun;Lim, Yeong-Seog
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.14 no.9
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    • pp.924-930
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    • 2003
  • In this paper, a novel miniaturized microstrip duplexer with attenuation pole is proposed. A three-pole microstrip CT(Cascade Trisection) two bandpass filters have each asymmetrically prescribed transmission zero are design and fabrication. This CT bandpass filter changes coupling structure, which not only shifts the location of attenuation poles but also improves skirt characteristics. The duplexer results of measurement with the cross coupling CT bandpass filters has been yielded better isolation and sharper skirt behavior than that with a conventional bandpass filter. The results of measurement are almost similar to those of simulation results.