• KOREAN JOURNAL OF CROP SCIENCE
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• v.32 no.2
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• pp.144-150
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• 1987

To increase the feed value of corn stover after grain harvesting, these studies were conducted to evaluate the methods and effects of intercropping with corn and legume crops, soybean and cowpea. Basic studies were designed to detect the light receiving efficiency of intercrops with change of row-space and interrowspace under plant density of the level of 5,555 plants/l0a. Another study was conducted to select the favorable varieties for intercropping. The plant space of 90 x 20 cm was more effective to increase the light receiving effeciency of intercrop without decrease the yield of corn than that of 60 x 30 cm. Among several corn hybrid/varieties, erect leaf type was desirable for intercropping with high light penetration. Silage yield of intercropping with corn and legume crops increased above 20% without decrease of grain yield of corn compared with monocropping. The silage of intercropping appeared as a good quality roughage bulky feed with high content of crude protein and fat.

• Journal of Life Science
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• v.15 no.3 s.70
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• pp.474-478
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• 2005

This study was conducted to analyze genetic characteristics and to develop the specific marker for Cheju native horse (Coo) at the level of sequence characterized amplified regions (SCARs). We collected blood samples from Cheju native horse and Thoroughbred horse (Th) and obtained genomic DNA from the blood of 50 individuals randomly selected within the breeds. Seven hundred primers were chosen randomly and were used to examin the polymorphism and 40 kinds of primers showed polymorphic RAPD band patterns between two breeds. Thirty primers of them showed horse specific bands. With the primer MG 30, amplified band of 2.0 kb showed the specificity to Cheju native horse (Cnh). Additionally MG 53 detected the thoroughbred horse (Th) specific markers at size of 2.3 kb. As the next, 2.3 kb band from MG 53 was checked with the all individuals from all the breeds of this study, and it maintained the reproducible breed specificity to thoroughbred horse (Th). With this results, 2.3 kb band was cloned into plasmid vector and sequenced bidirectionally from both ends of the cloned fragment. With the obtained sequences 10 nucleotide extended primers including the original arbitray primer were designed as a SCARs primer. Finally, the primer with extended sequence showed the reproducible breed differentiation pattern and it was possible to identify Cheju native horse (Cnh) from other breeds. The SCARs marker 2.3 kb from MG 53 could be used to identify Cheju native horse (Cnh) for not only registration but also horse breeding programe.

• Journal of Broadcast Engineering
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• v.13 no.5
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• pp.732-743
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• 2008

In H.264/AVC, 4$\times$4 block transform is used for intra and inter prediction instead of 8$\times$8 block transform. Using small block size coding, H.264/AVC obtains high temporal prediction efficiency, however, it has limitation in utilizing spatial redundancy. Motivated on these points, we propose a multi-dimensional transform which achieves both the accuracy of temporal prediction as well as effective use of spatial redundancy. From preliminary experiments, the proposed multi-dimensional transform achieves higher energy compaction than 2-D DCT used in H.264. We designed an integer-based transform and quantization coder for multi-dimensional coder. Moreover, several additional methods for multi-dimensional coder are proposed, which are cube forming, scan order, mode decision and updating parameters. The Context-based Adaptive Variable-Length Coding (CAVLC) used in H.264 was employed for the entropy coder. Simulation results show that the performance of the multi-dimensional codec appears similar to that of H.264 in lower bit rates although the rate-distortion curves of the multi-dimensional DCT measured by entropy and the number of non-zero coefficients show remarkably higher performance than those of H.264/AVC. This implies that more efficient entropy coder optimized to the statistics of multi-dimensional DCT coefficients and rate-distortion operation are needed to take full advantage of the multi-dimensional DCT. There remains many issues and future works about multi-dimensional coder to improve coding efficiency over H.264/AVC.

• Applied Chemistry for Engineering
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• v.17 no.1
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• pp.73-81
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• 2006

Heat treatment condition for the stabilization of foamed glass block through the foaming process of the hydrolized waste glass was investigated and scale-up test for the manufacturing of foamed glass was also attempted for the actual foaming process. Proper heat treatment condition was quenching from the foaming temperature to $550{\sim}600^{\circ}C$ for stabilization, and then annealing from stabilization temperature to $200^{\circ}C$ and holding up at $200^{\circ}C$ for removal thermal stress, and then annealing to the room temperature with cooling speed of $0.3^{\circ}C/min$. Through this heat treatment conditions, foamed glass block with size of $250mm{\times}250mm{\times}90mm$ was produced successfully. The properties of this foamed glass block showed density of $0.28{\pm}0.06g/cm^3$, thermal conductivity of $0.048{\pm}0.005kcal/hm^{\circ}C$, moisture absorption of $0.5{\pm}0.09vol%$, linear expansion coefficient of $(8.6{\pm}0.2){\times}10^{-6}m/m^{\circ}C$($400^{\circ}C$), flexural strength of $15.0{\pm}0.6kg/cm^2$, and compression strength of $39.5{\pm}0.6kg/cm^2$.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2006.05a
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• pp.113-116
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• 2006

자발착화 연소반응법 (Glycine Nitrate Process)을 응용한 초음파분무열분해장치를 이용하여 이차전지의 양극재료인 Ni치환형 $LiMn_2O-4$ 분말을 합성하였고, 각각의 하소온도에 따른 분말의 특성을 평가하였다. 전구용액은 산화제로 $Mn(NO_3)_2{\cdot}6H_20$EX>, $LiNO_3$, $Ni(NO_3)_2{\cdot}6H_20$를 사용하였고, 자발착화 에너지를 공급하기 위한 연료로는 glycine를 사용하였다. 분말의 결정상을 확인하기 위해 X-선 회절 시험을 시행하였으며, 각각의 조성별로 ICP측정결과 여러 조성들($LiNi_xNm_{2-x}O_4\;0{\leq}x{\leq]0.5$) 중 $LiNi_{0.3}Nm_{1.7}O_4$의 분말이 비교적 우수한 특성을 나타내었지만, 전기화학적 특성 평가 결과 이론용량값에 미치지 못하는 용량값을 나타내었다. 이것은 분말 합성 시 미량의 미 반응된 유기물들이 분말 표면에 피복되어 전기적 성질을 변화시키고 있기 때문임을 확인하였다. 이러한 특성을 개선하고자 추가적으로 하소 공정을 실시하여 전지의 성능를 평가 하였다. 분말의 미세구조와 형태, 크기, 전기 화학적 특성을 관찰하여 하소 전 후의 분말을 비교하였다.

• Journal of Bio-Environment Control
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• v.29 no.3
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• pp.259-264
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• 2020

In this study, the humidity control effect of a counter-flow ventilator was analyzed in a greenhouse with high relative humidity at night in the winter season. A case of the counter-flow ventilator was 0.96 × 0.65× 0.82(W × D × H, m) and there were heat transfer element and two fans for air supply and exhaust in the counter-flow ventilator. Two counter-flow ventilators were used in this study and the setting humidity of the ventilators was 80%. The temperature and relative humidity at night(18:00-8:00) in the greenhouse were measured. In a greenhouse without a counter-flow ventilator, the average temperature and humidity was 14.9℃, 82.8%, respectively. When the counter-flow ventilator was operated, the corresponding averages were 15.1℃, 79.9%. The independent sample t test of monthly temperature and relative humidity showed no difference in temperature, and a significant difference in relative humidity with 1% of the significance level. Therefore, using the counter-flow ventilator helps to control relative humidity in greenhouse and increase yield.. And further research considering the pros and cons of using the counter-flow ventilator is needed.

• Journal of the Earthquake Engineering Society of Korea
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• v.3 no.2
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• pp.41-54
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• 1999

Because of relatively heavy dead weight of concrete itself and unavoidable heat of massive concrete in bridge piers, circular hollow columns are widely used in Korean highway bridges. Since the occurrence of 1995 Kobe earthquake, there have been much concerns about seismic design for various infrastructures, inclusive of bridge structures. It is, however, understood that there are not much research works for nonlinear behavior of circular hollow columns subjected to eqrthquake motions. The objective of this experimental research is to investigate nonlinear behavior of circular hollow reinforced concrete bridge piers under the quasi-static cyclic load, and then to enhance their ductility by strengthening the plastic hinge region with glassfiber sheets. Particularly for this test, constant 10 cyclic loads have been repeatedly actuated to investigate the magnitude of strength degradation for the displacement ductility factor. Important test parameters are seismic design, confinement steel ratio, axial force and load pattern. It is observed from quasi-static tests for 7 bridge piers that the seismically designed columns and the retrofitted columns show better performance than the nonseismically designed colums, i.e. about 20% higher for energy dissipation capacity and about 70% higher for curvatures.

• Polymer(Korea)
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• v.35 no.1
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• pp.30-34
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• 2011

In this study, the effects of the electron beam irradiation on the thermal behavior and the abrasion properties of the glass fiber reinforced nylon 12 was investigated. The electron beam irradiation was carried out over a range of irradiation dose from 100 to 600 kGy with additive crosslinking agents such as triallyl cyanurate (TAC), triallyl isocyanurate (TAIC) and trimethylolpropane trimethacrylate (TMPTMA) for enhancing the crosslinking effects. The gel contents were increased dramatically above 200 kGy. It was verified that the degree of crosslinking depends on the radiation dose. The decreases of the melting temperature and the area of endothermic peak were observed as increasing the absorbed dose in the results of DSC analysis. The enhanced thermal stability was confirmed by the increases of decomposition temperature by electron beam irradiation. Furthermore, the negative deviations of the abrasion loss and the abrasion coefficients confirmed the improvement of the abrasion properties of irradiated nylon 12, as evidenced by SEM observation on the abrasion surfaces. The addition of the crosslinking agents to nylon 12 during effectively improved the thermal behavior and the abrasion properties of nylon 12 by the electron beam irradiation.

• Annual Conference on Human and Language Technology
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• 1999.10e
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• pp.441-446
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• 1999

본 연구는 접속사를 통한 텍스트 통합 과정이 논리적 추론 종류에 따라 다른 정보처리 과정 혹은 다른 종류의 단원적 구조(modular structure in language processing)에 의해 처리되는지를 조사하기 위해 실시되었다. 또한, 접속사를 통한 추론 과정이 실어증의 증상 종류에 따라 다른 종류의 언어정보처리 손상이 있는지를 평가하기 위해 실시되었다. 실험에 참가한 환자는 이해성 실어증환자(Wernicke aphasic), 전반성 실어증 환자(Global aphasic), 표현성 실어증 환자(Broca aphasic) 등이었다. en 종류의 과제를 이용하였다. 한 과제는 앞 뒤 문장을 논리적 관계성을 표현하는 접속사를 채워 넣는 과제였고 다른 과제는 접속사가 포함된 텍스트가 옳은지를 판단하는 정오 판단 과제였다. 실험재료 문장에 사용된 접속사는 추가적인 정보를 제공하는 '그리고'와 대등 관계를 나타내는 '그러나' 및 인과 관계를 표현하는 '그래서' 였다. 이 세 종류의 접속사는 각기 다른 논리적 관계성을 나타낸다. 실험 결과는 실어증 환자가 전반적으로 채워 넣기 과제에서 보다는 정오 판단 과제에서 더 많은 실수를 보였으며, 표현성 실어증 환자보다는 이해성 실어증 환자가 더 많은 오류를 보였다. 또한, 세 종류의 접속사 중에 '그리고'가 표함된 텍스트에서 더 많은 실수를 보였다. 이 연구에서 나타난 흥미 있는 결과는 표현성 실어증 환자는 '그러나' 접속사가 포함된 텍스트에서의 수행이 '그래서'가 포함된 경우에서보다 좋은 반면에 전반성 실어증 환자는 '그래서'를 포함하는 텍스트에서의 수행이 '그러나'를 포함하는 텍스트에서의 수행이 더 우수해서 이중해리(double dissociation)가 나타난다는 사실이다. 이 결과는 선후 문장이 어떤 종류의 논리적 관계성을 지니는가에 따라 다른 종류의 정보처리가 진행된다는 것을 암시하는 결과이다.>$\textrm{cm}^2$.。C로 비교적 양호한 초전박막의 전기적 특성을 나타내었다.(Mg+Fe)비를 갖고 전자에 비해 Al이 풍부한 환경에서 생성되었으며, 따라서 활석과 연관되지 않은 녹니석은 생성시 광체와 인접한 화강아질 편마암에 의해 주로영향을 받았을 것으로 생각된다. 녹니석의 이러한 2가지 화학조성상의 경향은 녹니석과 공존하는 운모류나 각섬석류들의 화학분석결과와도 잘 일치한다. 이러한 결과는 이 지역의 활석 광상이 초염기성암 기원의 사문암이 열수변질작용을 받아 생성되었음을 명확하게 지시하며, 따라서 활석 광석내에 존재하는 녹니석은 활석의 근원 광물로서 녹니석편암 및 녹니석 편마암 매의 녹니석이 활석화되고 남은 잔존광물이 아니라, 주변암에 의해 성분상의 영향을 받은 열수와 사문암과의 변질교대작용에 의한 활석화과정 중에 주로 생성된 것으로 추정된다. 이러한 결과는 연구지역의 활석광상이 초염기성암의 사문암화 작용과 활석화 작용의 두 가지 변질작용에 의해 형성되어졌음을 알려준다.농도 증가 없이 폐 조직에 약 50배 정도의 고농도 cisplatin을 투여할 수 있었으며, 또한 분리 폐 관류 시 cisplatin에 의한 직접적 폐 독성은 발견되지 않았다이 낮았으나 통계학적 의의는 없었다[10.0%(4/40) : 8.2%(20/244), p>0.05]. 결론: 비디오흉강경술에서 재발을 낮추기 위해 수술시 폐야 전체를 관찰하여 존재하는 폐기포를 놓치지 않는 것이 중요하며, 폐기포를 확인하지 못한 경우와 이차성 자연기흉에 대해서는 흉막유착술에 더 세심한 주의가 필요하다는 것을 확인하였다. 비디오흉강경수술은 통증이 적고, 입원기간이 짧고, 사회로의 복귀가 빠르며, 고위험군에 적용할 수 있고, 무엇보다도 미용상의 이점이 크다는 면에서 자연기흉에 대해 유용한 치료방법임에는 틀림이 없으나 개흉술에 비해 재발율이 높고 비용이 비싸다는 문제가 제기되고 있는 만큼

• Journal of Digital Convergence
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• v.14 no.1
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• pp.371-377
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• 2016

In the area of mobile game, the job of data analysis is very important. As the mobile game market is being expanded, the characteristics of the market have been so much changed, that the contents updating and marketing strategy should be built on thorough understanding and analysis result of the gamers' needs and their play pattern. Thus the importance of the mobile game management system can not be overemphasized. However, in practice, most of the mobile game companies are small scale, and they have intrinsic problem to provide successful game service to user with a dedicated operating team. To overcome these problems, this paper suggests an efficient mobile game management system based on our already developed mobile game. And the effectiveness of our system is illustrated by our case examples such as prompt response to user question or refund request. Our proposed system also played an important role to plan additional contents update, providing scientific data analysis result on user's play pattern and purchase trend.