• Proceedings of the Korean Society of Computer Information Conference
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• 2022.01a
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• pp.217-218
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• 2022

인공지능(Artificial Intelligence, 이하, AI) 기술의 발달로 각계각층에서 급진적인 변화를 대비하고 있다. 이에 교육부에서도 2022 개정 교육과정 주요사항에 AI 소양을 새로운 기초 소양으로 제시하였다. 이에 초등학생에게 AI 개념 및 원리를 전달하려는 교재가 많이 개발되고 있다. 교재 및 교과서는 교수·학습 과정에서 필수적인 역할을 수행한다. 그리고 교과서의 내용 요소 중 핵심적인 내용을 함축하는 삽화는 글보다 지식 전달에 효율적이다. 보다 일차원적이고 직관적인 삽화를 통하여 초등학생에게 인공지능 지식을 쉽게 전달하기 위하여 기존 교재에 제시된 삽화의 분석이 필수적이라고 판단하였다. 따라서 교육부와 한국과학창의재단에서 출판된 '학교에서 만나는 인공지능 수업(초등학생용)' 2권에 제시된 삽화를 종류 및 역할별로 분류하였다. 삽화의 종류 중 그림과 사진의 비중이 컸고, 자료제공을 하는 과정에서 삽화가 다수 사용되었다. 본 논문을 통하여 인공지능 교재의 삽화에 대한 보충적인 연구가 이루어지길 기대한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.1025-1027
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• 2022

도시화가 급속도로 진행됨에 따라서 일상생활에서 생활폐기물의 관리와 처리에 대한 문제가 심각해지고 있다. 이 문제를 해결하고자 어플리케이션을 통해 생활폐기물 처리를 쉽게 할 수 있는 시스템을 제안한다. '싹처리'는 편리성, 정확성, 확장성, 수익성을 가지고 (중)대형 생활 폐기물 처리하는 딥러닝 어플리케이션이다. 어플리케이션 내의 저장된 딥러닝 과정으로 학습되어진 생활폐기물 분류 모델을 통해 폐기물 사진을 자동 인식하는 과정으로 누구나 쉽게 폐기물 배출을 신청할 수 있다. 정확한 딥러닝 알고리즘과 전이학습, 데이터 검수 등을 통해 높은 성능의 사물 자동 인식을 할 수 있다. 이 시스템을 통해 임산부, 장애인, 독거노인 등의 사회적 약자는 불필요한 과정 없이 손쉽게 폐기물을 처리할 수 있고, 더 나아가 중고시장의 활성화에 기여할 수 있는 가치가 있다.

• Korean journal of applied entomology
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• v.62 no.4
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• pp.325-331
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• 2023

Desmometopa Loew, 1866 is newly recognized in the Korean Peninsula, based on Desmometopa microps Lamb, 1914 that is new to Korean insect fauna. The species is known to have commensalistic habits with predacious insects and spiders. Diagnosis, description, images and DNA barcode sequences are provided, based on the obtained adult specimens.

• Journal of the Korean Arthroscopy Society
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• v.10 no.1
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• pp.53-60
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• 2006

Purpose: This study is to analyze the clinical and radiological results after arthroscopic reduction and internal fixation of intra-articular fractures of lateral tibial plateau. Materials and Methods: The subject of the study are the 13 cases of the patients visited orthopedics surgery during March year 2000 to August year 2004 because of intra-articular fractures of lateral tibial plateau and were treated with arthroscopic reduction and internal fixation. X-rays and CT or MRI were both carried out to identify the precise pattern of fracture and the degree of depression which showed out to be all type 2 by Schatzker fracture classification. And in 9 of the cases, autogenous and allogenous bone grafts were given as bone loss were severe. The average age was 48, age group between 31 and 66, and average follow up period of about 38 months ($13{\sim}65months$). Radiological ratings were given by comparing the X-rays of degree of joint congruency before and after the operation, functional ratings by analyzing IKDC score and Lysholm score. Combined injuries observed after arthroscopy were posterior cruciate ligament injury in 1 case, meniscus injury in 4 cases and medial collateral ligament in 2 cases. Results: During follow up, X-rays showed well-maintained reduction of articular surface in all cases and no complications such as joint depression, fracture reduction loss, angular deformity or malunion were found. Average Lysholm score at last follow up was 87 points ranging from 65 to 97, in 8 of the cases excellent, 3 good, 1 fair and 1 poor according to Lynsholm classification. Average IKDC score was 92 (from 82 to 99). Conclusion: Not only does arthroscopic reduction of lateral tibial plateau fracture bring exact reduction of articular surface, but also, is considered to be a good way of operation to diagnose and treat combined injuries of knee joint using arthroscopy.

• The Journal of the Korean bone and joint tumor society
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• v.12 no.1
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• pp.23-29
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• 2006

Purpose: To evaluate the effectiveness of steroid injection for treatment of simple bone cyst in adults. Materials and Methods: 11 patients who were able to be followed up from February 1998 to February 2003. These lesions were attained by needle aspiration or trepanation and 80 mg to 200 mg of Depo-medrol (methylprednisolone acetate, Shin Poong Pharm. Co., Korea) was injected. The follow-up roentgenograms were done every 2 weeks, and if there were no evidence of recovery, re-injection was done 8 weeks later. Injection has done maximally 5 times, and we evaluated the result with modified Neer, Pentimalli, Scaglietti and Sandra classification. Results: There were no cases in which one Injection was enough for full recovery, and 3 cases after 2 injections, 3 cases after 3 injections, 2 case after 5 injections had good result. but 2 cases after more than 5 injections did not show improvements and are currently under observation. One case showed a increase in size of the bone cyst after 2 injections of steroid and underwent curettage and autogenous bone graft. Overall outcomes by Pentimalli classification were good in One case, fair in 7 cases and poor in 3 cases at final follow-up. Conclusion: Local injection of steroids is effective method in adults and can be considered as a first line treatment modality.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.826-833
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• 2009

Currently, the rise of social tagging has changing taxonomy to folksonomy. Tag represents a new approach to organizing information. Nonhierarchical classification allows data to be freely gathered, allows easy access, and has the ability to move directly to other content topics. Tag is expected to play a key role in clustering various types of contents, it is expand to network in the common interests among users. First, this paper determine the relationships among user, tags and resources in social tagging system and examine the circumstances of what aspects to users when creating a tag related to features of websites. Therefore, this study uses tags from the social bookmarking service 'del.icio.us' to analyze the features of tag words when adding a new web page to a list. To do this, websites features classified into 7 items, it is known as tag classification related to resources. Experiments were conducted to test the proposed classify method in the area of music, photography and games. This paper attempts to investigate the perspective in which users apply a tag to a webpage and establish the capacity of expanding a social service that offers the opportunity to create a new business model.

• Journal of Korean Orthopaedic Sports Medicine
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• v.11 no.1
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• pp.37-43
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• 2012

Purpose: This study is to evaluate the clinical results of pull-out suture for root tear of posterior horn of medial meniscus. Materials and Methods: Between March 2006 and February 2011, We studied 40 cases with the root tear of posterior horn of medial meniscus which follow up more than 1 years. Mean age was 49.5 years old. We excluded osteoarthritis or varus deformity patients more than 5 degrees. pull-out suture was performed to the patients with grade 0-2 of Kellgren and Lawrence classification. According to Outerbridge classification, evaluation of cartilage damage was performed during arthroscopy. Evaluation of clinical result was used the Lysholm score. Results: The mean pre-operation Lysholm score was 63.9 and post-operation score was 86.3. The complete failure rate was 3 of 40 cases (7.5%). Twenty of 40 cases (50%) showed cartilage lesions in weight bearing portion of medial femoral condyle which were 12 cases in grade 1, 5 cases in grade 2 and 3 cases in grade 3 according to the Outerbridge classification. Conclusion: In the treatment of pull-out suture for root tear of posterior horn of medial meniscus, exclusion of more than moderate arthritis or varus deformity is very importment. Pull-out suture seems to be a useful treatment of the root tear of posterior horn of medial meniscus in mild osteoarthritis or varus deformity of middle ages.

• Journal of Broadcast Engineering
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• v.19 no.3
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• pp.396-404
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• 2014

The field of searching clothing, which is very difficult due to the nature of the informal sector, has been in an effort to reduce the recognition error and computational complexity. However, there is no concrete examples of the whole progress of learning and recognizing for cloth, and the related technologies are still showing many limitations. In this paper, the whole process including identifying both the person and cloth in an image and analyzing both its color and texture pattern is specifically shown for classification. Especially, deformable search descriptor, LBPROT_35 is proposed for identifying the pattern of clothing. The proposed method is scale and rotation invariant, so we can obtain even higher detection rate even though the scale and angle of the image changes. In addition, the color classifier with the color space quantization is proposed not to loose color similarity. In simulation, we build database by training a total of 810 images from the clothing images on the internet, and test some of them. As a result, the proposed method shows a good performance as it has 94.4% matching rate while the former Dense-SIFT method has 63.9%.

• Korean Journal of Plant Taxonomy
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• v.45 no.4
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• pp.362-368
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• 2015

Two new and one unrecorded hybrids of the genus Asplenium were newly found in Korea. They were proved to be hybrid based on intermediate morphology between putative parents. The first hybrid is $A.{\times}uiryeongse$ C.S. Lee & K. Lee (Aspleniaceae), nom. nov. (vernacular name: geo-mi-sa-cheol-go-sa-ri). This new hydrid is a cross between the Asian walking fern, A. ruprechtii and A. pekinens in Uiryeong-gil, Mt. Bukansan, Seoul, Korea. The other new one occurs in Mt. Seongsan in Yeoncheon-gun, Gyeonggi-do, Korea, $A.{\times}montanus$ C.S. Lee & K. Lee, nom. nov. (vernacular name: san-kko-ri-go-sa-ri) which might have experienced multiple hybridization events between A. ruprechtii ${\times}$ A. trichomanes and A. incisum following the hybrid between A. ruprechtii and A. trichomanes. In addition, one unrecorded hybrid, $A.{\times}kitazawae$ Kurata & Hutoh (vernacular name: geo-mi-dol-dam-go-sa-ri), reported first from Japan, is found in natural habitats in Do-dong, Daegu-si, and is a hybrid, between the Asian walking fern and A. sarelli. These hybrid taxa grow in sympatric regions with both putative parental species. The diagnostic characters for each taxon and evidence for their hybridization have been suggested. Descriptions, illustrations, and photographs of these hybrid taxa in their habitats are provided from Korea.

• Journal of Korean Society of Forest Science
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• v.106 no.1
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• pp.100-109
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• 2017

This study was conducted for preliminary survey and management support for Pine Wood Nematode (PWN) suppression. We took areal photographs of 6 areas for a total of 2,284 ha during 2 weeks period from 15/02/2016, and produced 6 ortho-images with a high resolution of 12 cm GSD (Ground Sample Distance). Initially we classified 423 trees suspected for PWN infection based on the ortho-images. However, low accuracy was observed due to the problems of seasonal characteristics of aerial photographing and variation of forest stands. Therefore, we narrowed down 231 trees out of the 423 trees based on the initial classification, snap photos, and flight information; produced thematic maps; conducted field survey using GNSS; and detected 23 trees for PWN infection that was confirmed by ground sampling and laboratory analysis. The infected trees consisted of 14 broad-leaf trees, 5 pine trees (2 Pinus rigida), and 4 other conifers, showing PWN infection occurred regardless of tree species. It took 6 days for 2.3 men from to start taking areal photos using UAV (Unmanned Aerial Vehicle) to finish detecting PNW (Pine Wood Nematode) infected tress for over 2,200 ha, indicating relatively high efficacy.