• Title/Summary/Keyword: 풀이방법

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Study on the Restoration Method of DMZ Barren Land through the Application of Native Plants (자생식물 적용을 통한 DMZ 불모지 복원공법 연구)

  • Young-Eun Kim;Dong-Hak Kim;Hyeong-Bok Cho;Mi-Young Huh;Sang-Jun Kim
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2022.09a
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    • pp.65-65
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    • 2022
  • 지속가능한 DMZ 일원의 생태복원 추진을 위해 DMZ 생태교란지에서 복원공법 모니터링을 실시하였다. 본 실험은 강원도 인제군, 철원군 및 경기도 연천군의 DMZ 내(450m2)에서 진행되었으며, 흰민들레, 구절초, 매발톱, 질경이, 꿀풀이 공시식물로 사용되었다. 각 대상지의 식생유형별 시공방법에 따른 침입종 억제효과를 알아보기 위해 2022년 4월부터 9월까지 일반식생기반재와 특수식생기반재로 처리된 실험구의 전체 피도, 도입종 피도, 침입종 피도, 초장, 출현종 등을 측정하였다. 전체 피도는 세 곳 모두 일반 기반재보다 특수기반재에서 더 높게 나타났으나 대상지에 따라 침입종 피도가 미치는 영향은 달랐다. 도입종의 피도는 인제, 철원, 연천에서 동일하게 흰민들레가 가장 높은 수치를 보였고, 특수기반재에서 보다 높은 피도를 보였다. 폭염 및 폭우로 6월 이후 흰민들레가 감소하면서 구절초, 매발톱의 피도가 점차 증가하였으며 기반재 간의 큰 차이는 없었으나 일부 지역에서는 구절초 피도가 특수기반재보다 일반기반재에서 더 높게 나타났다. 또한, 모든 지역에서 질경이와 꿀풀의 생장은 미미하였다. 같은 처리를 했음에도 대상지별로 소재식물의 출현 여부, 생장률, 침입종의 피도 등이 다른 것으로 보아 복원지의 환경 여건에 따라 적용해야 하는 종, 시공방법, 주변 완충지역의 범위 등에 차이를 두어야 할 것으로 보인다.

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LLM-based Question Generation Learning System for Improve Users' Literacy Skills (사용자의 문해력 향상을 위한 LLM기반 문제 생성 시스템)

  • Ji-Sung Park;Seung-Min Park
    • The Journal of the Korea institute of electronic communication sciences
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    • v.19 no.6
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    • pp.1243-1248
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    • 2024
  • Due to the recent development of video media and the popularity of short and stimulating content, the frequency of exposure to text media such as books and newspapers has decreased. As a result, literacy skills among consumers in their teens and twenties have significantly declined, leading to various social problems. In this study, we propose a solution by developing a problem generation system based on a Large Language Model (LLM) aimed at improving users' literacy skills. The system allows users to select a question type (reading, speaking, listening) and input part of a desired text (e.g., news articles, literary/non-literary passages, research papers), based on which it automatically generates the selected type of question. Additionally, when the user inputs an answer, the system generates feedback on the correctness of the response along with a detailed explanation. The system's high accessibility and personalized problem generation make it distinctly different from existing literacy education methods and is expected to present a new direction for literacy learning.

Hierrachical manner of motion parameters for sports video mosaicking (스포츠 동영상의 모자익을 위한 이동계수의 계층적 향상)

  • Lee, Jae-Cheol;Lee, Soo-Jong;Ko, Young-Hoon;Noh, Heung-Sik;Lee Wan-Ju
    • The Journal of Information Technology
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    • v.7 no.2
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    • pp.93-104
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    • 2004
  • Sports scene is characterized by large amount of global motion due to pan and zoom of camera motion, and includes many small objects moving independently. Some short period of sports games is thrilling to televiewers, and important to producers. At the same time that kinds of scenes exhibit exceptionally dynamic motions and it is very difficult to analyze the motions with conventional algorithms. In this thesis, several algorithms are proposed for global motion analysis on these dynamic scenes. It is shown that proposed algorithms worked well for motion compensation and panorama synthesis. When cascading the inter frame motions, accumulated errors are unavoidable. In order to minimize these errors, interpolation method of motion vectors is introduced. Affined transform or perspective projection transform is regarded as a square matrix, which can be factorized into small amount of motion vectors. To solve factorization problem, we preposed the adaptation of Newton Raphson method into vector and matrix form, which is also computationally efficient. Combining multi frame motion estimation and the corresponding interpolation in hierarchical manner enhancement algorithm of motion parameters is proposed, which is suitable for motion compensation and panorama synthesis. The proposed algorithms are suitable for special effect rendering for broadcast system, video indexing, tracking in complex scenes, and other fields requiring global motion estimation.

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The Effects of Mulching Materials and Weed Control Methods on Growth and Weed Occurrence of Pesticide-Free Kale(Brassica oleracea L. var. acephala) (멀칭재료와 제초방법이 무농약재배 케일(Brassica oleracea L. var. acephala)의 생육과 잡초 발생에 미치는 영향)

  • Lim, Kyeong-Ho;Kim, Sun-Guk;Kim, Do-Ik;Seo, Youn-Won;Yang, Seung-Koo;Kim, Yong-Soon;Kim, Hong-Jae;Kim, Jung-Guen
    • Korean Journal of Organic Agriculture
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    • v.17 no.4
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    • pp.501-517
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    • 2009
  • This research was carried out to study the effect of mulching materials and weed control methods on weed occurrence and growth of kale on upland and paddy soil of field culture at spring and autumn season. Paddy soil temperature of mulching treatments was high by 0.92.0C in comparison of non-mulching at autumn season. The control value of weed was over 91% at mulch paper and time required for weed control was reduced by 70% at mulch paper + machine weeding in comparison of non-mulching + hand weeding. The yield of kale was similar to that of conventional culture. Paddy soil temperature of mulch paper was higher on April, but lower on May and June than non-mulching at spring season. Dominant weed was Chenopodium album var. centrorubrum Makino, The control value of weed was over 91% at mulch paper, time required for weed control was reduced by 75% at mulch paper + machine weeding in comparison of non-mulching + hand weeding and the yield of kale increased by 34% than conventional culture. Dominant weed was Alopecurus aequalis var. amurensis Ohwi. on paddy soil at autumn season. The control value of weed was 43% at mulch paper. Time required for weed control was reduced by 80% at mulch paper + machine weeding in comparison of non-mulching + hand weeding. The yield of kale increased by 26% compared with than of conventional culture.

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Development of Roundup Ready Bentgrass for the Control of Poa annua (새포아풀 방제를 위한 Roundup Ready Bentgrass의 개발)

  • Christians, Nick E.;Lee, Jeong-Ho
    • Asian Journal of Turfgrass Science
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    • v.20 no.1
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    • pp.77-82
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    • 2006
  • Annual bluegrass(Poa annua L.) is a problem weed that is very difficult to control on golf courses. There are some reasons that make Poa annua such a difficult weed to be controled. One of these reasons is this plant's ability to reproduce its seed even under stressful conditions. Another reason is its adaptation to low mowing heights. Above all things, the greatest competitive advantage of Poa annua is its genetic diversity. Generally, Poa annua is a bunch type and annual type cool-season grass, but some types act as weak perennials and have stolons. There has been much research on controlling annual bluegrass in golf course turf with chemical and cultural techniques. This research has been conducted for more than 85 years. There has been some progress in controlling some types of Poa annua, but these methods have not been successful on every biotype. Among all of the techniques, Roundup ready creeping bentgrass has the most promise of controlling the diverse types of Poa annua. Roundup ready bentgrass is capable of tolerating the effects of Roundup(glyphosate) while it kills other plants including Poa annua. By using this new technology, we can make Poa annua free greens, tees, and fairways.

A Study on Meaning in Solving of Mathematical Modeling Problem (수학적 모델링문제 해결에서의 의미에 관한 연구)

  • Kim, Chang Su
    • Journal of the Korean School Mathematics Society
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    • v.16 no.3
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    • pp.561-582
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    • 2013
  • Meanwhile, the meaning has been emphasized in mathematics. But the meaning of meaning had not been clearly defined and the meaning classification had not been reported. In this respect, the meaning was classified as expressive and cognitive. Furthermore, it was reclassified as mathematical situation and real situation. Based on this classification, we investigated how student recognizes the meaning when solving mathematical modeling problem. As a result, we found that the understanding of cognitive meaning in real situation is more difficult than that of the other meaning. And we knew that understanding the meaning in solving of equation, has more difficulty than in expression of equation. Thus, to help students understanding the meaning in the whole process of mathematical modeling, we have to connect real situation with mathematical situation. And this teaching method through unit and measurement, will be an alternative method for connecting real situation and mathematical situation.

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A Study on the Effect of Visual Communication Utilizing Smartphones on Basic Mathematics Education at the Tertiary Level (대학기초수학 수업에서 스마트폰을 활용한 시각적 의사소통이 수학교육에 미치는 영향 연구)

  • Hong, Ye-Yoon;Im, Yeon-Wook
    • Journal of Digital Convergence
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    • v.14 no.10
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    • pp.53-60
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    • 2016
  • This study investigated the effect of visual mathematics education using smartphones and immediate feedback through SNS on students' understanding of basic mathematical concept and academic achievement at the tertiary level. Researchers analyzed the test results of 214 students' mid-term and final examination in 4 classes consisted of 16 weeks' classes with two hours per week. Also their 30 questionnaire survey results were analyzed. The result reveals that classes using smartphones promoted understanding mathematical concepts and induced students' motivation and affirmative reaction. This study implies that an appropriate use of technology will support dynamic visualization of mathematical modeling and its interpretation, which enables students' active participation and deeper understanding.

The Level of Satisfaction and Needs Assessment of e-Learning Contents on Vocational High School (전문계고 이러닝 교수.학습 콘텐츠 만족도 및 요구 분석)

  • Byun, Sook-Young
    • The Journal of Korean Association of Computer Education
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    • v.13 no.3
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    • pp.47-54
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    • 2010
  • The purpose of this study is to improve expertise and substantiality of teachers by analyzing the level of satisfaction and the needs assessment of e-learning instructional contents on vocational subject at vocational high school. For the above purpose, we carried out a questiones to the 126 teachers and the 646 students in the second and the third grade of vocational high school. As a result, even though teachers knew the e-learning contents, they does not actively use the e-learning contents in class. They feels in need of contents which are able to be reconstructed. Students also prefer the contents focused on problem-solving to prepare for the national academic aptitude test and indirect experiences through simulation ways.

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Frequency Response Analysis on PCB in Dual Resonant Cavity by Using Stochastical and Topological Modeling (확률론과 위상학적 모델링을 이용한 이중 공진구조 내의 PCB 주파수 응답해석)

  • Jung, In-Hwan;Lee, Jae-Wook;Lee, Young-Seung;Kwon, Jong-Hwa;Cho, Choon-Sik
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.25 no.9
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    • pp.919-929
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    • 2014
  • In recent, the requirements for the safety to the effects of high power electromagnetic wave have been increased along with the development of electricity and electronic equipments. The small sized electronic devices and the various components have been analyzed by using the full-EM simulation and solving a complete set of Maxwell equation. However, the deterministic approach has a drawback and much limitation in the electromagnetic analysis of an electrically large cavity with a high complexity of the structure. In this paper, statistical theory and topological modeling method are combined to analyze the large cavity with a complex structure. In particular, the PWB(Power Balance) method and BLT(Baum-Liu-Tesche) equation are combined and employed to solve the frequency response to the large-scaled cavity with remarkably reduced time-consumption. For instance, a PCB substrate inside box of box are considered as a large structure with a complexity.

A Fast Computation Method of Far Field Interactions in CBFM for Electromagnetic Analysis of Large Structures (임의 대형구조 전자기 해석을 위한 CBFM의 빠른 원거리 상호 작용 계산 알고리즘)

  • Park, Chan-Sun;Hong, Ic-Pyo;Kwon, Obum;Kim, Yoon-Jae;Yook, Jong-Gwan
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.29 no.9
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    • pp.701-706
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    • 2018
  • The characteristic basis function method, or CFBM, is one of the representative electromagnetic methods widely used today. In this paper, we propose an accelerating algorithm for the far field interaction calculation of CBFM, to efficiently analyze the electromagnetic characteristics of arbitrarily large structures. To effectively analyze the electromagnetic characteristics of a large structure, it is essential to shorten the computation time. In the CBFM analysis method, the complexity can be greatly reduced by using approximations created via the multipole expansion method. The new algorithm proposed in this paper is applied to the computation of radar cross sections of conductor spheres and fighter aircraft, and it is confirmed that calculation time is reduced by 34 % and 74 %, respectively, without loss of accuracy compared with existing CBFM.