• Title/Summary/Keyword: 조영실제

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Sudoku Puzzle Difficulty Measurement using Genetic Algorithm (유전자 알고리즘을 이용한 수도쿠 퍼즐 난이도 측정)

  • Cho, Yeongjo;Kim, Byoungwook
    • Proceedings of the Korea Information Processing Society Conference
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    • 2019.10a
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    • pp.499-501
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    • 2019
  • 스도쿠는 다양한 연령대의 사람들에게 인기있는 논리 기반 조합 퍼즐 게임입니다. 이러한 인기로 인해 다양한 수준의 난이도로 스도쿠 퍼즐을 생성하고 해결하기 위해 컴퓨터 소프트웨어가 개발되고 있습니다. 본 논문은 유전자 알고리즘 (Genetic Algorithm)을 이용하여 스도쿠 퍼즐의 해결 및 스도쿠 퍼즐의 난이도를 평가하는 문제를 연구한다. 유전자 알고리즘이 수행되는 동안 적합도 함수가 수렴되는 시간이 길수록 퍼즐의 난이도가 높을 것이라는 가정한다. 본 논문에서는 유전자 알고리즘을 이용하여 스도쿠 퍼즐을 해결하는 알고리즘을 개발하고, 스도쿠 퍼즐 제작자들에 의해 난이도가 정해진 실제 스도쿠 퍼즐을 개발된 알고리즘으로 해결하는데 시간을 측정한다. 측정된 시간과 퍼즐 문제의 상관 관계를 분석하여 가정을 검증한다. 실험결과에서 알고리즘의 실행시간과 퍼즐의 난이도에는 유의미한 상관관계가 있음을 보였다.

A Research on Threats of Steganography-based Botnets constructed over the SNS Environment (SNS 환경에서의 Steganography 기반 Botnets 구축 가능성 조사 및 대응방안 연구)

  • Jeon, Jaewoo;Cho, Youngho
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2019.01a
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    • pp.111-114
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    • 2019
  • 최근 봇넷(Botnet)은 PC 뿐만 아니라 IoT 기기를 대상으로 확대되어 구축되고 있으며, 최신 기술들이 적용되면서 탐지와 방어가 어렵도록 구축되고 있다. 특히, 해커와 테러범 사이에서 많이 활용되는 정보 은닉 기술인 스테가노그래피(Steganography)가 적용된 Botnet(Stego-botnet)이 출현하였는데, 기존의 Botnet 형태와는 달리 SNS 환경을 Botnet 개체 사이의 통신 기반으로 활용하며 Steganography 기술로 통신 내용을 숨겨 탐지가 어렵기 때문에 그 위험성과 피해가 심각할 수 있다. 본 논문에서는 SNS 환경에서의 Steganography 기반 Botnet 구축 가능성을 조사하고, 실제로 카카오톡을 활용한 Steganography 기반 Botnet 통신 가능성을 실험한 후 결과를 제시하며, Steganography 기반 Botnet에 대한 탐지 및 역추적 방안을 간략히 제안한다.

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Comparison of Deep Learning Loss Function Performance for Medical Video Biomarker Extraction (의료 영상 바이오마커 추출을 위한 딥러닝 손실함수 성능 비교)

  • Seo, Jin-beom;Cho, Young-bok
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2021.05a
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    • pp.72-74
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    • 2021
  • The deep learning process currently utilized in various fields consists of data preparation, data preprocessing, model generation, model learning, and model evaluation. In the process of model learning, the loss function compares the value of the model with the actual value and outputs the difference. In this paper, we analyze various loss functions used in the deep learning model for biomarker extraction, which measure the degree of loss of neural network output values, and try to find the best loss function through experiments.

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VR Gym with Tof Sensor (Tof 센서를 이용한 VR 헬스장)

  • Beom-jun Kim;Yong-il Song;Sua Lee;Young-bok Cho
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2023.07a
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    • pp.295-296
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    • 2023
  • VR 헬스장은 시간적 부담과 이동이 힘든 사람들이 운동을 편안하고 정확한 자세로 할 수 있도록 온라인 헬스와 VR 기기를 접목한 가상현실 기반의 헬스케어 시스템이다. tof 센서가 장착되어 있는 카메라를 통해 주변 지형지물과 실제 몸의 움직이는 모션 정보를 정확하게 전달하여 원하는 장소에서 정확한 자세로 PT를 받을 수 있도록 한다. 원하는 시간과 장소에서 하고 싶은 운동을 할 수 있게 제공하여 시공간에 제약받는 사람도 꾸준한 운동을 통해 건강관리가 가능하여 운동하는 사람이 증가하는 것에 의의가 있다.

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Development of Korean Sign Language Translator for Speech and Hearing Impaired (언어·청각장애인을 위한 한국 수어 번역기 개발)

  • Su-Beom Jo;Dong-Kyu Lee;Young-Chan Jo;Dongmahn Seo
    • Proceedings of the Korea Information Processing Society Conference
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    • 2023.11a
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    • pp.575-576
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    • 2023
  • 한국 수어는 소리로 말을 배울 수 없어서 사용하는 '보이는 언어'이고 한국수화언어를 줄인 말이다. 한국어나 영어와 같이 독립된 언어로 한국어와는 문법 체계가 다른 대한민국 농인의 고유한 언어이다. 하지만, 한국 사회에서는 수어를 일상어로 사용하는 농인이 수어만으로 다른 사람과 대화하거나 서비스 등을 이용하기에는 쉽지 않은 구조이다. 이에 본 논문에서는 택시라는 상황을 가정해 택시 안에서 학습된 모델이 농인의 수어를 인식하고 택시 기사에게 해당 의미를 전달하는 시스템을 제안한다. 제안 시스템을 통해 택시 기사는 농인(수어사용자)에게 응답할 수 있다. 본 논문에서는 한국수어 번역기 웹서비스를 설계 및 구현하여 실제 환경에서의 활용 가능성을 검증한다.

System for Extraction and Classification of Critical Objects using YOLOv8 (YOLOv8을 활용한 디지털 문서의 핵심 객체 추출 및 분류 시스템 설계)

  • Young-Rae Cho;Hong Jun Kim;Byung Hoon Park;Sooyeon Shin;Chi hoon Lee
    • Proceedings of the Korea Information Processing Society Conference
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    • 2024.05a
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    • pp.596-599
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    • 2024
  • 디지털 문서의 유통과정에서 발생할 수 있는 보안상의 문제를 해결하기 위해서는 파일 복사, 이동과정에 문서의 보안 등급을 자동 검출하고 특정 문서의 유출을 방지하는 보안 솔루션이 필요하다. 따라서 본 논문에서는 이러한 보안상의 문제를 해결하기 위하여 하나의 검출 분류 시스템을 제안하고자 한다. 제안한 시스템은 디지털 문서 내용을 이용하여 핵심 정보라고 판단되는 객체를 우선 추출한 후 그 핵심 유형을 분류하는 과정을 통해서 핵심 정보를 사전에 탐지하도록 하였다. 이를 위해서 SOTA를 달성한 YOLOv8를 이용하여 디지털 문서의 핵심 객체 감지하고 또한 파인튜닝을실시한 모델을 이용하여 그 유형을 분류하도록 설계하였다. 해당 시스템 검증을 위해서 기업에서 사용하고 있는 실제 사내 문서를 데이터셋을 이용하고 그 성능평가를 실시하였다.

Effect of Restriction of Dry Matter and Nutrient Intakes on Productivity of Holstein Lactating Cows Offered High Levels of Concentrate (건물 및 영양소 섭취량 제한이 농후사료 급여 비율이 높은 착유우의 생산성에 미치는 영향)

  • Cho, Young-Seok;Rim, Jong-Su;Jang, Won-Seok;Kim, Myeong-Hwa;Lee, Sang-Rak
    • Journal of Animal Science and Technology
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    • v.51 no.1
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    • pp.33-38
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    • 2009
  • Effects of dry matter intake restriction to the level of recommend by NRC (2001) on intake balance of dry matter and nutrients in Holstein lactating cow were evaluated. 24 lactating cows were divided into two groups and individually fed one of the TMR offered as ad libitum (control) and restricted amount (treatment) as recommended by NRC (2001). Milk yield including 4% FCM and FPCM were showed higher tendency in treatment group then those of control group. Also, intakes of dry matter, net energy and metabolizable protein were tended to be higher in treatment group then control group. Actual dry matter and net energy intakes in control group were higher (p<0.001) then those of recommended amount by NRC (2001), whereas no significant differences in treatment group. The estimated $NE_L$ allowable milk yield were lower (p<0.001) in both control and treatment group than those of recommended by NRC (2001). It was concluded that to allow ad libitum feeding of diet containing high levels of concentrate to the lactating cows might decrease the efficiency of feed nutrients and hence result in no positive effect on productivity of milk.

Typical and Atypical Imaging Features of Malignant Lymphoma in the Abdomen and Mimicking Diseases (복부 악성 림프종의 영상 소견 및 비슷한 소견을 보일 수 있는 질병들)

  • Jong Eun Kim;So Hyun Park;Young Sup Shim;Sungjin Yoon
    • Journal of the Korean Society of Radiology
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    • v.84 no.6
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    • pp.1266-1289
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    • 2023
  • Malignant lymphoma typically presents with homogeneous enhancement of enlarged lymph nodes without internal necrotic or cystic changes on multiphasic CT, which can be suspected without invasive diagnostic methods. However, some subtypes of malignant lymphoma show atypical imaging features, which makes diagnosis challenging for radiologists. Moreover, there are several lymphoma-mimicking diseases in current clinical practice, including leukemia, viral infections in immunocompromised patients, and primary or metastatic cancer. The ability of diagnostic processes to distinguish malignant lymphoma from mimicking diseases is necessary to establish effective management strategies for initial radiological examinations. Therefore, this study aimed to discuss the typical and atypical imaging features of malignant lymphoma as well as mimicking diseases and discuss important diagnostic clues that can help narrow down the differential diagnosis.

A Study on the Construction and Landscape Characteristics of Munam Pavilion in Changnyeong(聞巖亭) (창녕 문암정(聞巖亭)의 조영 및 경관특성에 관한 연구)

  • Lee, Won-Ho;Kim, Dong-Hyun;Kim, Jae-Ung;Ahn, Gye-Bog
    • Journal of the Korean Institute of Traditional Landscape Architecture
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    • v.32 no.2
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    • pp.27-41
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    • 2014
  • This study aims to investigate the history, cultural values prototype through literature analysis, characteristics of construction, location, space structure and landscape characteristics by Arc-GIS on the Munam pavilion(聞巖亭) in Changnyeong. The results were as follows. First, Shin-cho((辛礎, 1549~1618) is the builder of the Munam pavilion and builder's view of nature is to go back to nature. The period of formation of Munam pavilion is between 1608-1618 as referred from document of retire from politics and build a pavilion. Secondly, Munam pavilion is surrounded by mountains and located at the top of steep slope. Pavilion was known as scenic site of the area. But damaged in a past landscape is caused by near the bridge, agricultural facilities, town, the Kye-sung stream of masonry and beams. Thirdly, Munam pavilion is divided into the main space, which is located on the pavilion, space in located on the pavilion east and west and the orient space, which is located on the Youngjeonggak. Of these, original form of Munam pavilion is a simple structure composed of pavilion and Munam rock, thus at the time of the composition seems to be a direct entry is possible, unlike the current entrance. Fourth, Spatial composition of Munam pavilion is divided into vegetation such as Lagerstroemia indica trees in Sa-ri in Changnyeong, ornament such as letters carved on the rocks and pavilion containing structure. The vegetation around the building is classified as precincts and outside of the premises. Planting of precincts was limited. Outside of area consists of front on the pavilion, which is covered with Lagerstroemia Indica forest and Pinus densiflora forest at the back of the pavilion. Ofthese,LargeLagerstroemiaIndicaforestcorrespondstothenaturalheritageasHistoricalrecordsofrarespeciesresourcesthatareassociated withbuilder. Letterscarvedontherocksrepresenttheboundaryof space, which is close to the location of the Munam pavilion and those associated with the builder as ornaments. Letters carved on the rocks front on the pavilion are rare cases that are made sequentially with a constant direction and rules as act of record for families to honor the achievements. Fifth, 'The eight famous spots of Munam' is divided into landscape elements that have nothing to do with bearing 4 places and landscape elements that have to do with bearing 4 places. Unrelated bearings of landscape elements are Lagerstroemia indica trees in Sa-ri in Changnyeong, Pinus densiflora forest at the back of the pavilion, Okcheon valley, Gwanryongsa temple and Daeheungsa temple. Bearing that related element of absolute orientation, which is corresponding to the elements are Daeheungsa temple, Hwawangsan mountain, Kye-sung stream and Yeongchwisan mountain. Relative bearing is Gwanryongsa temple, Yeongchwisan mountain and Kye-sung stream Gongjigi hill. At Lagerstroemia indica trees in Sa-ri in Changnyeong, Pinus densiflora forest at the back of the pavilion, Kye-sung stream and Okcheon valley, elements are exsting. Currently, it is difficult to confirm the rest of the landscape elements. Because, it is a generic element that reliable estimate of the target and locations are impossible for element. Munam pavilion is made for turn to nature by Shin-cho(辛礎). That was remained a record such as Munamzip(聞巖集) and Munamchungueirok(聞巖忠義錄) that is relating to construction of pavilion. Munam pavilion located in a unique form, archival culture through the letters carved on the rocks and Large Lagerstroemia indica forest and through eight famous spots, cultural landscape elements can be assumed that those elements are remained.

Experiment to Calculate the Dosage of Radiopharmaceutical Products during the Bone Scan Tests (Bone Scan 검사 시 실제 환자에게 투여되는 용량 계산을 위한 실험)

  • Lee, Wang-Hui;Ahn, Sung-Min
    • The Journal of the Korea Contents Association
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    • v.15 no.4
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    • pp.357-362
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    • 2015
  • In this experiment, we are to know the administered radioactivity in the actual patients by measuring the remained radioactivity when administering the isotope with noted MDP, the radiopharmaceutical product, to 50 visited patients for the bone scan, confirmed the radioactivity administered to actual patients. We confirmed the actual administered amount of remained radioactivity in the syringe and 3-way by using a gauger after administering the isotope with MDP noted via 3-way with 50 patients maintaining 3-way after CT or MRI among the visited patients for the bone scan in the department of nuclear medicine. As a result of radioactivity in the 3-way and syringe pre and post injection of radiopharmaceutical products in 50 patients, average radioactivity of pre-injection is 31.75 mCi, average remained radioactivity in the syringes after injection is 1.22 mCi, and the average remained radioactivity in 3-way after injection is 0.95 mCi. The average of actual administered radioactivity is 29.57, so it is obvious that average 2.18 mCi was administered for less than the dosage that we initially intended to inject. When determining the dosage in view of the radioactivity that remains in the 3-way with the syringe, it would be possible to accurately dose the desired dosage to be administered to actual patients.