• Journal of the Mineralogical Society of Korea
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• v.7 no.1
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• pp.14-24
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• 1994

The Sungsan clay deposits have been formed by the hydrothermal alteration of volcanic and volcanoclastic rocks of the Hwangsan Formation of Cretaceous age. Claystones are mainly composed of dickite, alunite, illitic minerals and tosudite. The mineralogical properties of clay minerals have been studied using X-ray diffraction analysis, electron microscopy, electron microprobe analysis, and infrared absorption analysis. The physicochemical condition for the clay deposits also have been studied by the activity diagrams and mineral assemblages. Dickite, the dominant mineral in clay deposits, occurs generally as massive aggregates. It shows book-structure of well-defined hexagonal plates. Chemistry of dickite agrees with its ideal formula. Peak depth ratios in infrared absorption spectra were used for discrimination between pure and mixture of kaolin minerals. Five hydrothermal alteration zones are divided according to the mineral assemblages. From center to margin, alunite, dickite, illite and albite zones are discernible. Quartz zone occurs as small lenticular form in dickite zone. The formation of dickite and illite zones are promoted by decreasing $a_{k^+}$. An increase in $a_{H_{2}SO_{4}}$ or $a_{K_{2}SO_{4}}$ is required for the formation of alunite zone. Estimated temperature of formation ranges 110-270 $^{\circ}C$

• Korean Journal of Health Education and Promotion
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• v.9 no.1
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• pp.14-29
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• 1992

의학이 발달하고 수명이 연장되고, 그리고 식사가 보다 서양화되는 등 생활양식이 변화됨에 따라 성인병이 1970년대부터 한국에 보다 늘어나게 되었다. 본 연구는 면접 및 설문지법을 이용하여 성인병, 특히 고혈압, 당뇨병 및 암에 관하여 도시 및 시골 거주자들의 지식, 태도 및 실천을 비교 연구하였다. 연구기간은 1990년 1월 부터 12월까지 1년동안이었고 대상은 전체 716명으로 그중 360명은 부산시 거주자였고 356명은 부산 근교의 시골거주자였다. 고혈압, 당뇨병 및 암에 대해 알고 있다고 응답한 대상자는 각각 92.6%, 92.0% 및 74.7%였다. 고혈압, 당뇨병 및 암의 지식도에 있어서 도시 거주자들이 시골 거주자보다 유의하게 더 많이 알고 있었다(각각 p<0.001). 그러나 성인병에 관한 태도와 지식에 있어서는 도시 거주자와 시골 거주자 사이에 유의한 차이가 없었다(p<0.05). 고혈압의 지식도는 거주지(r=0.2159, p<0.01) 및 수입 (r=0.1882, p<0.01)과 유의한 상관관계가 있었고, 당뇨병에 관한 지식도는 거주지(r=0.3952, p<0.001), 수입(r=0.3663, p<0.001) 및 직업(r=0.2576, p<0.001), 수입(r=0.4138, p<0.001), 직업(r=0.3044, p<0.001) 및 성별(r=-0.1887, p<0.01)과 유의한 상관관계가 있었다. 성인병에 관한 태도는 성별(r=0.4748, p<0.001), 경제상태(r=0.2209, p<0.01) 및 고혈압 지식도(r=0.1844, p<0.01)와 유의한 상관관계를 나타내었다. 성인병에 관한 실천은 본 연구에서 어떤 변수와도 상관관계가 없는 것으로 나타났다. 성인병이 이전보다 더 많아짐에 따라 연령이 증가하는 나라와 개발국가에서 성인병이 주요한 대상질환이 될 것이고, 질병예방과 건강증진의 차원에서 성인병을 예방하기 위해 보건교육에 보다 중점을 두어야 할 것이다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.20 no.1
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• pp.45-51
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• 2009

The propagation characteristics in parallel plate waveguide with dielectric layer having periodic metal strip pattern are investigated. PIN diode ON/OFF states are regarded as the short and open circuit, respectively, in the simulation using CST's MWS. The $11.25^{\circ}$, $22.5^{\circ}$, and $45^{\circ}$ layers which can be used for X-band 4-bit Radant lens phase shifter, are designed. The simulated results for each dielectric layer are $11.28^{\circ}$, $23.2^{\circ}$, and $46.22^{\circ}$, respectively. Also, the equivalent circuit of each layer at the operating band is realized and simulated using Agilent's ADS. The ADS simulated results are compared with the MWS simulated ones. Measured differential phase shills at the center frequency are $9.6^{\circ}$, $22.4^{\circ}$, and $43^{\circ}$, respectively.

• Journal of the Korean Institute of Gas
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• v.5 no.4 s.16
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• pp.8-20
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• 2001

Neoliberalism became a catch word of a post-cold war era. It began to develop in the middle of welfare state crisis in developed countries. It promoted both a unified world market through mutual penetration of national boundaries in International scene and maximization of efficiency through market competition in domestic scene. Privatization of public corporations is a major policy to pursue market efficiency through deregulation. Two reasons are often adduced to support the cause The socio-economic changes diminished the necessity to establish public corporation on the one hand. On the other hand gross inefficiency has been observed in the management of public corporation. 'Government failure' is an apt expression of the inefficiency. In analysing the experiences of privatization of utility industries of some other countries we found a couple of lessons for a Korean case. First, it is doubtful if privatization, that is a change in the form of ownership, is a necessary condition for achieving market efficiency. Because it is possible to operate a mechanism of market competition while maintaining competition among public corporations and with private actors. Second, the patron-agent dilemma is often cited as a major culprit of an inefficient management of public corporations. But it is without saying that the dilemma is also found in the management of private firms. So, the issue is not the privatization per se but to realize responsible management through discipline and incentives.

• Journal of Korean Society of Forest Science
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• v.103 no.2
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• pp.233-239
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• 2014

This study was carried out to propose the criteria for the prediction of landslide occurrence through analysis the influence of each factor by using the quantification theory. The results obtained from this study are summarized as follows. From a stepwise regression analysis between the landslide area($m^2$) and environmental factors, the factors strongly affecting the landslide sediment($m^2$) were the Parents rock (igneous), cross slope(complex), coniferous forests (forest type) and slope gradient ($21{\sim}30^{\circ}$). According to the range, it was shown in order of Cross slope (0.2922), Parents rock (0.2691), Forest type (0.2631) and Slope gradient (0.2312). The range of prediction score of landslide occurrence has been distributed between score 0 and score 1.0556, the median value was score 0.5278. The prediction for class I was over 0.7818, for class II was 0.5279 to 0.7917, for class III 0.2694 to 0.5278 and for class IV was below 0.2693. The prediction on landslide occurrence appeared relatively high accuracy rate as 72% for class I and II. Therefore, this score table for landslide will be very useful for judgement of dangerous slope.

• The KIPS Transactions:PartC
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• v.17C no.3
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• pp.271-280
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• 2010

For the next generation mobile communication system, diverse wireless network techniques such as beyond 3G LTE, WiMAX/WiBro, and next generation WLAN etc. are proceeding to the form integrated into the All-IP core network. According to this development, Beyond 3G integrated into heterogeneous wireless access technologies must support the vertical handover and network to be used of several radio networks. However, unified management of each network is demanded since it is individually serviced. Therefore, in order to solve this problem this study is introducing the theory of Common Radio Resource Management (CRRM) based on Generic Link Layer (GLL). This study designs the structure and functions to support the vertical handover and propose the vertical handover algorithm of which policy-based and MCDM are composed between LTE and WLAN systems using GLL. Finally, simulation results are presented to show the improved performance over the data throughput, handover success rate, the system service cost and handover attempt number.

• Journal of Music and Human Behavior
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• v.9 no.1
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• pp.37-53
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• 2012

This study is conducted to analyse the process and the pattern of motivation for musical expression in clinical music therapy for the adults in the mental health center. The participant were 8 adults purposive sampling who had more than one year music therapy experience in the mental health center and their age ranged from 27 to 53. A major category derived and analysed from the grounded theory method by Strauss and Corbin. The qualitative analysis indicated that motivation for musical expression in music therapy, which was the central phenomenon in this study, was determined by the music therapist and songs used in the sessions. The central phenomenon was caused by the therapist's friendly attitude, high musical capacity, the familarity of the selected songs and the significancy of the lyrics of selected songs. The levels of reliability about the therapist's personality and musical ability as a professional music therapist and the positive arousal of the songs used in sessions affected as the contextual condition. Spontaneous musical expression in music therapy brought the escape from reality, release of stress and sharing by the intervening condition 'empathy' and this resulted in mood regulation, the instillation of hope and group cohesion. It has been found that there were three types of motivation in music therapy: intrinsic motivation, relationship dependent extrinsic motivation and evasive motivation.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.9 no.6
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• pp.1-8
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• 2014

The government has established a foundation activation measures across a total of 10 times to expanse job creation, promote new growth engines and enhance youth entrepreneurship for trying to spread socially. In order to improve startup activation policies and excavation, it is necessary to supplement the gaps going to construct a stable infrastructure through periodic status research on their occupational sense and entrepreneurship awareness. Since 2012, the government's has been surveyed to address the current understanding of the occupational sense and entrepreneurship awareness of population characteristics. Until 2013 only the youth were surveyed, recently from 2014 expanded its range to the public. This study laid the foundation for a more comprehensive set of analysis through which to learn and understand the differences between the status of each group for entrepreneurship awareness by utilizing survey data from the government. And this study was obtained from a survey of university students and the general public. A total of 3000 people nationwide survey was conducted about the entrepreneurship environment for start-ups and entrepreneurship awareness and success factors for a month. The University students survey result were classified according to the area, school and gender. And The general public survey was classified according to the area, the age and gender. Each response result indicates a significant difference between the students and the general public did not appear. But through this survey, This study would contribute the establishment of the national startup infrastructure.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.39 no.12
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• pp.927-934
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• 2015

In this study, we numerically investigated the concentration characteristics of a linear Fresnel reflector system that can drive a solar thermal absorption refrigeration system to be installed in Saudi Arabia. Using an optical modeling program based on the Monte Carlo ray-tracing method, we simulated the concentrated solar flux, concentration efficiency, and concentrated solar energy on four representative days of the year - the vernal equinox, summer solstice, autumnal equinox, and winter solstice. Except the winter solstice, the concentrations were approximately steady from 9 AM to 15 PM, and the concentration efficiencies exceed 70%. Moreover, the maximum solar flux around the solar receiver center changes only within the range of $13.0{\sim}14.6kW/m^2$. When we investigated the effects of the receiver installation height, reflector width, and reflector gap, the optimal receiver installation height was found to be 5 m. A smaller reflector width had a greater concentration efficiency. However, the design of the reflector width should be based on the capacity of the refrigeration system because it dominantly affects the concentrated solar energy. The present study was an essential prerequisite for thermal analyses of the solar receiver. Thus, an optical-thermal integration study in the future will assist with the performance prediction and design of the entire system.

• Journal of the Korean Society for Nondestructive Testing
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• v.27 no.5
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• pp.409-416
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• 2007

In accordance with the increased usage of reinforcing materials such as carbon fibers and glass fibers, delamination detection between concrete and the reinforcing material is needed as such delaminations may be a major cause for strength reduction or failure of a structure. In this work, 15 GHz center frequency with 10 GHz band width horn antenna was used to detect delamination between concrete and carbon fibers or glass fibers. The specimens measured $600\;(length)\;{\times}\;600\;(width)\;{\times}\;100\;(thickness)\;mm$, and glass fibers and carbon fibers with a thickness of 1.5 mm were attached on the specimens' surfaces using epoxy. In addition, artificial delaminations of size $50\;(length)\;{\times}\;50\;(width)\;mm$ were placed in the middle of the specimen with thickness of 2, 4, 6 mm respectively together with a 2 mm delamination projecting upwards from the surface of the concrete. Therefore a total of 8 specimens were used, 4 specimens for glass fiber reinforced concrete and 4 for carbon fiber reinforced concrete, containing delaminations as described above. The experiment results were derived by using the difference of area under the curved graph. According to experimental results artifical delaminations were identified in both fiber reinforced and carbon reinforced specimens and these results could contribute to further development of delamination detection technology.