• Title/Summary/Keyword: 경북

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Deep Learning based Adaptive Video Streaming with Mobile Data Usage (모바일 데이터 사용량을 고려한 딥러닝 기반 적응형 비디오 스트리밍)

  • Kim, Minseob;Hur, Sungjae;Lee, Heejong;Vu, Van Son;Choi, Minje;Lim, Kyungshik
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • fall
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    • pp.225-228
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    • 2021
  • 최근 모바일 비디오 스트리밍 서비스의 이용자 수가 증가하고 있다. 이에 따라 모바일 환경에 적합한 DASH 비디오 스트리밍 메커니즘이 연구되었고, 이것을 DQN 기법에 의해 개선한 알고리즘은 모바일 네트워크 환경에서 적절한 비디오 품질 선택을 통해 버퍼링을 크게 줄일 수 있었다. 그러나 이는 모바일 요금제로 비디오 스트리밍 서비스를 이용하는 사용자들에게 안정적인 서비스를 제공하기 어렵다. 이에 본 논문은 기존의 DQN 기법에 의한 알고리즘을 발전시켜 사용자의 모바일 요금제에 적합한 비디오 품질을 선택하는 알고리즘을 연구하고 성능 실험 결과를 분석한다. 또한 이 알고리즘을 전체 모바일 비디오 스트리밍 시스템과 통합하여 이용하도록 제안한다.

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Rhythm and interval correction music therapy programs for children with developmental disabilities (발달 장애 아동을 대상으로 한 리듬·음정 교정식 음악 치료 프로그램)

  • Choi, Hee-ju;Ra, Hee-jae;Hwang, Eun-ji;Kim, Woo-yeon;Lee, Yong-woo;Koh, Seok-ju;Park, In-cheol
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2020.07a
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    • pp.607-610
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    • 2020
  • 21세기 핵심 키워드 중 하나로 두뇌 산업이 떠오르고 있다. 미국, 일본 등 선진 국가에서는 이미 뇌 연구에 활발한 투자가 진행되고 있다. 이에 따라 본 논문에서는 출생과 성장기 뇌 발달에 문제가 발생하는 발달 장애 아동을 위한 음악 치료 프로그램을 개발하고자 한다. 효과적인 발달 장애 치료를 위해, 조기 발견 후 인지 학습 치료가 필요하다. 그 중 인지 기능과 자가 관리 기능을 기르는 것이 중요한데, 리듬 타이밍 훈련이 발달 장애 아동의 기억 능력 개선에 도움이 된다는 여러 입증된 연구 결과가 있다. 그러나 아직까지 발달 장애 아동을 위한 적절한 치료 방법이 없기에 본 논문에서는 인지 학습 치료가 필요한 아동에게 도움을 주기 위해 동요의 정확한 리듬, 음정을 학습하는 프로그램을 제안한다. 아동의 지속적인 흥미를 끌 수 있는 게임과 인지능력 훈련을 결합하였기에, 보다 좋은 학습 효과를 유도할 수 있을 것이다.

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Development of dataset amplification software (학습데이터 증폭 소프트웨어 개발)

  • Seo, Kyeong-Deok;Koh, Seok-Joo;Shin, Jae-Won;Park, Hyung-Seok;Joe, Seong-Yoon;Kim, Kyeong-Rae
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2020.07a
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    • pp.664-666
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    • 2020
  • 데이터의 다양성은 학습에 따른 모델의 성능을 좌지우지하는 중요한 요소이다. 그렇기 때문에 많은 양의 데이터를 확보하는 것은 학습에 있어서 아주 중요하다. 하지만, 데이터를 수집하는 것은 시간과 비용이 많이 드는 단계 중 하나이다. 본 논문에서는 제한된 데이터를 가지고 이미지 처리를 거쳐 대량의 데이터로 증폭시켜 많은 양의 데이터를 확보하는 과정에 대해 제안한다. 가지고 있는 YOLOv4용 학습 데이터 셋을 활용하여 사용자로부터 입력받은 확대/축소 비율, 각도로 데이터를 변형하고, 이렇게 추가로 생성된 데이터 셋을 기존 학습 데이터 셋에 재포함시키는 소프트웨어를 개발하는 것을 목표로 한다. 구현된 소프트웨어로 증폭된 대량의 데이터 셋을 다시 원본 학습 데이터 셋에 추가하고, 같은 영상에 대해서 원본 데이터 셋만 학습시킨 경우의 객체 검출 결과와 증폭된 학습 데이터 셋이 포함된 데이터 셋의 경우의 객체 검출 결과를 비교하여 그 성능을 검증하고 분석하도록 한다.

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Silver Nanoparticles Enhanced Chemiluminescence of Luminol-KIO4 System for the Determination of Mandelic Acid (Mandelic Acid 정량을 위한 은 나노입자에 의해 증가된 화학발광분석법)

  • Alam, MD R-Mahmnur;Kamruzzaman, Mohammad;Kim, So Yeon;Jo, Hae Jin;Lee, Sang Hak;Kim, Young Ho;Choi, Jong Ha
    • Applied Chemistry
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    • v.15 no.1
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    • pp.21-24
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    • 2011
  • A sensitive silver nanoparticles (Ag NPs) enhanced chemiluminescence (CL) method is reported for the determination of mandelic acid (MA). This method is based on the luminol-KIO4 system catalyzed by Ag NPs to produce CL spectra. Prepared Ag NPs were characterized by UV-visible spectra and TEM image. Under optimal condition, CL spectra of the system were responded linearly with the concentration of MA in the range of 2.5×10-9 to 2.0×10-8 mol L-1 (r=0.9989) with a detection limit of 1.2×10-10 mol L-1. The relative standard deviation of 1.0×10-7 mol L-1 MA was found 1.45 (n=9).

Study of Surfactant Sensitized Fluorescence of Europium-Salicylic Acid Complex for the Determination of Salicylic Acid (Salicylic Acid 정량을 위한 Europium-Salicylic Acid 복합체의 계면활성제 증감 형광법에 관한 연구)

  • Alam, MD R-Mahmnur;Kamruzzaman, Mohammad;Kim, So Yeon;Jo, Hae Jin;Lee, Sang Hak;Kim, Young Ho;Suh, Jung Kee
    • Applied Chemistry
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    • v.15 no.1
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    • pp.29-32
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    • 2011
  • Surfactant enhanced fluorescence (FL) of europium-salicylic acid (SA) complex has been studied. It was observed that weak FL of Eu(III) at the wavelength of 589 nm and 612 nm was found to be enhanced after addition of salicylic acid and cetyltrimethylammonium bromide (CTAB) surfactant upon excitation at 395 nm. Under optimized condition, FL intensity of Eu(III) at 612 nm responded linearly with the concentration of SA in the range of 5.5×10-9 to 1.5×10-6 M of SA. The detection limit was calculated from the calibration curve(3Sb/m) as 9.27×10-9 M.

Develpment of Automatic Classification For Categorizing Recyclable Materials (딥러닝을 활용한 재활용 폐기물 선별 시스템 개발)

  • Park Seung Woo;Kim Hyung Don;Sim Sang Woo;Yoo, Seong Won;Kim Jae-Soo;Lee Sang Won;Jeon Woo jin
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2023.07a
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    • pp.739-740
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    • 2023
  • 코로나19 의 여파로 생활 폐기물은 급속도로 늘어나는 반면 재활용 사업장의 여건은 개선되지 않고 있어 재활용 산업의 인력난 해결의 필요성이 떠오르고 있다. 이를 위해 본 논문에서는 딥러닝 모델을 활용하여 재활용 폐기물을 분류하는 방법을 제시한다. 딥러닝 모델은 최신 객체 탐지 모델인 YOLOv5를 사용하고, 객체 탐지 성능을 향상시키기 위해 실제 환경에서 수집된 학습용 데이터를 직접 라벨링하여 사용한다. 실험 결과 종류별 평균 0.69의 mAP50 스코어를 기록하였으며 이를 통해 딥러닝 모델을 활용하여 재활용 폐기물을 효율적으로 분류하는 것이 가능함을 확인하였다.

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Effect of Persimmon Peel as an Additional Feeding (사료에 첨가된 감껍질의 효과)

  • Shin, Sangsu;Yi, Junkoo;Kong, Changsu;Kwon, Woosung;Ryoo, Zaeyoung;Kim, Eungyung;Kim, Hyeonjin;Ha, Jaejung;Hong, Doyoung;Yoon, Duhak;Kim, Sunghyun;Kim, Myoung Ok
    • Korean Journal of Poultry Science
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    • v.46 no.2
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    • pp.87-94
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    • 2019
  • Huge amount of persimmon peels, which are byproducts usually arising after making dried persimmons from fresh persimmons, are generated in fall, every year. As the dry matter of persimmon peel contains carbohydrates over 80%, it could be a good candidate for feed. In this study, we evaluated the persimmon peel as a feed resource for a hen laying eggs. Persimmon peel has lower ratio of crude protein and fat composition while higher ratio of crude fiber composition compared to a basal laying hen feed. Feeding the persimmon peel by adding to the feed at the level of 2% or 5% did not affect the egg-laying rate from beginning to the peak of laying. In addition, feeding the persimmon peel did not affect the egg quality either, as the pH, Haugh unit, yolk color and shell thickness of the egg were not different from each other. The composition of amino acids and fatty acids were also almost same for each other, except for the linolenic acid which was slightly higher in the persimmon peel feeding groups. In conclusion, addition of persimmon peel to the feed up to 5% might be helpful to increase the income and reduce the waste produced from the agricultural byproduct.

Comparison of Fine Root Development of Pinus densiflora, Prunus serrulata var. spontanea, and Zelkova serrata after Root Cutting and Wound Dressing (소나무, 벚나무, 느티나무 단근 후 연고 처리에 따른 발근 비교)

  • Park, Junhyung;Kim, Jiyeon;Kweon, Si-Gyun;Kim, Haerang;Kwon, Junhyung;Lee, Harim;Kim, Dawon;Ma, Jiwon;Kim, Pan-Gi;Koh, Sang-Hyun;Kim, Ki Woo
    • Journal of Korean Society of Forest Science
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    • v.108 no.2
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    • pp.269-275
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    • 2019
  • The aim of our study was to compare the wound responses and fine root development after root cutting and wound dressing among different tree species. The roots (2~4 cm in diameter) of mature Pinus densiflora, Prunus serrulata var. spontanea, and Zelkova serrata grown in Sangju, South Korea, were cut every 6 months from May 2014 to November 2016. The cut roots were subjected to pastes of vaseline and organic fertilizer. Six months after cutting, fine root development in the cut roots was examined. There was a significant increase in the fine root development in P. serrulata and Z. serrata; however, the development was rarely observed in P. densiflora. Zelkova serrata showed the highest fine root development among the three species in both the control and organic paste treatment groups. No significant differences in fine root development were observed in P. serrulata among the treatments. These results indicate that different tree species exhibit different responses to wound dressing after root cutting, which suggests that specific treatments must be applied to specific tree species.

Anti-coagulation and Platelet Aggregation Inhibitory Activities of the Ethanol Extract of Aerial Bulbils of Dioscorea alata L. (열대마 영여자 추출물의 항응고 및 혈소판 응집저해 활성)

  • Su-Gyeong Jeon;So-Young Choe;Kyung-Ran Im;Jong-Pil Lee;Jun-Hong Park;Ho-Yong Sohn
    • Journal of Life Science
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    • v.34 no.3
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    • pp.153-159
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    • 2024
  • Dioscorea alata L, commonly known as "tropical yam" is the most widely consumed yam species among the 650 yam species belonging to the Dioscoreacea family. It is extensively cultivated in tropical and subtropical regions and is a major food source in Africa and India. Also, it is used for medicinal purposes, particularly in China and Taiwan, for its anti-inflammatory properties. In comparison to other yam varieties such as D. batatas or D. opposita, the tropical yam has gained popularity in Korea due to its higher yield per unit area. In this study, the nutritional characteristics and anti-thrombosis activity of the aerial bulbils of D. alata L. tropical yam were compared to those of D. opposita. The results showed that the aerial bulbils of tropical yam exhibited nutritional characteristics and potent anticoagulant activity compared to those of domestic yam varieties. The bulbils extract of tropical yam showed superior anticoagulant activities against thrombin, prothrombin and blood coagulation factors. Furthermore, the bulbils extract of tropical yam exhibited strong platelet aggregation inhibition at 0.25 mg/ml and showed no hemolytic activity up to a concentration of 2.5 mg/ml. These findings suggest the potential development of high-value anti-thrombosis agents utilizing the aerial bulbils of tropical yam.

A Study on the Strategy for Developing Specialized Collections of Gyeongbuk Library (경북도서관 특화장서 개발 전략 연구)

  • Yoon, Hee-Yoon;Oh, Seon-Kyung
    • Journal of the Korean Society for information Management
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    • v.38 no.1
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    • pp.143-168
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    • 2021
  • In most countries, public libraries play a role as a knowledge and information hub for local communities, a complex cultural space, and a third place for meetings and communication. Among the work of public libraries for this purpose, the key point is systematic collection development, and the established collection is essential for all knowledge and information services. In particular, local representative libraries must perform legal duties as a comprehensive knowledge information center for metropolitan governments, and develop, preserve, and service specialized collections that are difficult for other public libraries. Therefore, we analyzed the development cases of specialized collections of public libraries in large cities in foreign countries and local representative libraries in Korea, surveyed the degree of awareness of specialized collections for employees of public libraries and the cultural to geography in Gyeongbuk region. Based on the background information, this study proposed the development plan and establishment strategy of the Gyeongbuk Library specialized collection, which was named "Gyeongbuk Knowledge and Cultural Heritage."