• The Transactions of the Korea Information Processing Society
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• v.7 no.2
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• pp.552-557
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• 2000

In the paper, we proposed a face recognition method that uses GA-BP(Genetic Algorithm-Back propagation Network) that optimizes initial parameters such as bias values or weights. Each pixel in the picture is used for input of the neuralnetwork. The initial weights of neural network is consist of fixed-point real values and converted to bit string on purpose of using the individuals that arte expressed in the Genetic Algorithm. For the fitness value, we defined the value that shows the lowest error of neural network, which is evaluated using newly defined adaptive re-learning operator and built the optimized and most advanced neural network. Then we made experiments on the face recognition. In comparison with learning convergence speed, the proposed algorithm shows faster convergence speed than solo executed back propagation algorithm and provides better performance, about 2.9% in proposed method than solo executed back propagation algorithm.

• Microbiology and Biotechnology Letters
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• v.50 no.1
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• pp.1-14
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• 2022

Bacteria communicate with each other through an intricate communication mechanism known as quorum sensing (QS). QS regulates different behavioral aspects in bacteria, such as biofilm formation, sporulation, virulence gene expression, antibiotic production, and bioluminescence. Several different chemical signals and signal detection systems play vital roles in promoting highly efficient intra- and interspecies communication. Gram-negative bacteria coordinate gene regulation through the production of acyl homoserine lactones (AHLs). Gram-positive bacteria do not code for AHL production, while some gram-negative bacteria have an incomplete AHL-QS system. Despite this fact, these microbes can detect AHLs owing to the presence of LuxR solo receptors. Various studies have reported the role of AHLs in interspecies signaling. Moreover, as bacteria live in a polymicrobial community, the production of extracellular compounds to compete for resources is imperative. Thus, AHL-mediated signaling and inhibition are considered to affect virulence in bacteria. In the current review, we focus on the synthesis and regulation mechanisms of AHLs and highlight their role in interspecies bacterial signaling. Exploring interspecies bacterial signaling will further help us understand host-pathogen interactions, thereby contributing to the development of therapeutic strategies intended to target chronic polymicrobial infections.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.951-952
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• 2023

소위 '인생네컷'이라 불리는 셀프사진관은 MZ 세대의 새로운 놀이 문화로 떠오르며 사용자 수가 나날이 증가하고 있다. 그러나 짧은 시간 내에 다양한 포즈를 취해야 하는 셀프사진관 특성상 촬영이 낯선 사람에게는 여전히 진입장벽이 존재한다. 더불어 매번 비슷한 포즈와 사진 결과물에 기존 사용자는 점차 흥미를 잃어가는 문제점도 발생하고 있다. 이에 본 연구에서는 셀프사진관 사용자의 관계를 분류하는 모델을 개발하여 관계에 따른 적합하고 다양한 포즈를 추천하는 프레임워크를 제안한다. 사용자의 관계를 'couple', 'family', 'female_friend', 'female_solo', 'male_friend', 'male_solo' 총 6 개로 구분하였고 실제 현장과 유사하도록 단색 배경의 이미지를 우선으로 학습 데이터를 수집하여 모델의 성능을 높였다. 모델 학습 단계에서는 모델의 성능을 높이기 위해 여러 CNN 기반의 모델을 전이학습하여 각각의 정확도를 비교하였다. 결과적으로 195 장의 test_set 에서 accuracy 0.91 의 성능 평가를 얻었다. 본 연구는 객체 인식보다 객체 간의 관계를 학습시켜 관계성을 추론하고자 하는 것을 목적으로, 연구 결과가 희박한 관계 분류에 대한 주제를 직접 연구하여 추후의 방향성이나 방법론과 같은 초석을 제안할 수 있다. 또한 관계 분류 모델을 CCTV 에 활용하여 미아 방지 혹은 추적과 구조 등에 활용하여 국가 치안을 한층 높이는 데 기대할 수 있다.

• Journal of Environmental Science International
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• v.33 no.8
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• pp.569-574
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• 2024

This study analyzed the travel characteristics of Gangneung's Gyeongpo District and user reactions by utilizing YouTube videos. The findings were as follows: First, the most frequently visited places by YouTube video producers in Gyeongpo District were Gyeongpo Lake (55%) and Gyeongpo Beach (28%). In particular, videos featuring walks along the lake and beach paths were prominent, regardless of the season. Second, YouTube video producers predominantly enjoyed solo travel to Gyeongpo Lake (69%) and Gyeongpo Beach (71%), with notably few visits to historical sites. Third, viewers who watched YouTube videos related to Gyeongpo District preferred videos under 10-15 minutes in duration. Comments typically focused on "photos," "information," "solo travel," "hotels," and "healing," with positive evaluations of scenery and accommodations. Fourth, the top nine YouTube videos with the highest view counts were produced by individuals, with limited responses to videos produced by local governments or authorities. The findings identified popular tourist destinations and trends in the Gyeongpo District, noting a bias in visits and behaviors of video producers toward specific locations. This suggests the need to develop tourism resources by utilizing the natural and historical assets of Gyeongpo District. The findings are expected to guide future tourism policies, promotional efforts, and marketing strategies for Gyeongpo District.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.1
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• pp.56-61
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• 2015

This is the Study of the Bass performance of the Jimmy Blanton who is first pioneer of Jazz Style Bass playing. Since the contrabass is using in jazz Performances Before jimmy Blanton, playing technique was mainly played repeatedly with simply two or four Beat with Root or 5th degree of Chord Tone. In Other words, there was only root based Note along with Harmony which doesn't have Bass Solos or Melodic phrase Appeared in Bass playing. Jimmy Blanton Was the First Bass Player who changes This Traditional Concept of Jazz bass playing after New Orleans Jazz era. He was introduced variety of accompaniment Style with Various rhythmic phrase and Bass Soloing like a horn Player. We could know that His Style Continues to Such as Ray Brown, Paul chambers who has a big Name after Jimmy Blanton. I analyzed accompaniment Style and solo techniques Of Jimmy Blanton with the Song "Cotton tail and MR.JB Blues" Which He Performed with Duke Ellington. I learned a lot while I'm analyzing his Performing Style from Jimmy Blanton, such as Target Note playing, using Chord Tones and Arpeggios, Melodic Solo Style, Jazz Style Bowing Technique, Question and Answer Phrasing etc. I could notice That He Was the true Pioneer of the First Bass player In the Early Jazz days.

• Restorative Dentistry and Endodontics
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• v.34 no.5
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• pp.397-405
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• 2009

This study compared the effect of an activator, intermediate bonding resin and low-viscosity flowable resin on the microtensile bond strength of a self-curing composite resin used with two-step total etching adhesives. Twenty extracted permanent molars were used. The teeth were assigned randomly to nine groups (n=10) according to the adhesive system and application of additional methods (activator, intermediate adhesive, flowable resin). The bonding agents and additional applications of each group were applied to the dentin surfaces. Self-curing composite resin buildups were made for each tooth to form a core, 5mm in height. The restored teeth were then stored in distilled water at room temperature for 24h before sectioning. The microtensile bond strength of all specimens was examined. The data was analyzed statistically by one-way ANOVA and a Scheffe's test. The application of an intermediate bonding resin (Optibond FL adhesive) and low-viscosity flowable resin (Tetric N-flow) produced higher bond strength than that with the activator in all groups. Regardless of the method selected, Optibond solo plus produced the lowest ${\mu}TBS$ to dentin. The failure modes of the tested dentin bonding agents were mostly adhesive failure but there were some cases showed cohesive failure in the resin.

• Textile Coloration and Finishing
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• v.13 no.3
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• pp.203-210
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• 2001

본 연구에서는 솔로 방적사의 물성과 이들 실로 만들어진 직물의 물성을 분석해 봄으로서 솔로 방적사의 최적 생산조건과 실의 생성 미케니즘을 분석 연구하고자 하였다. 이를 위해서 7가지의 솔로 스펀 롤러를 제작하고 이를 이용하여 방적사를 제조한 후 일반 링 방적사와 물성 비교 분석에 의한 최적 생산 조건 및 솔로 스피닝의 미케니즘을 조사하였다 그리고 최적 솔로 스피닝 롤러에 의해 만들어진 솔로 스펀 방적사를 이용하여 직물을 제직하여 일반 링 방적사 직물과 물성 비교를 통하여 솔로 스피닝 직물의 현장 적용성을 검토하였다.

• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.241-242
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• 2015

본 연구는 최근 관광 트렌드로 부상하고 있는 '나홀로 여행족'이 나타나게 된 사회문화적 배경을 각종 문서자료를 통해 탐색해보고 개념을 살펴보고자 하였다. 그리고 본 연구에서는 나홀로 여행족의 사례를 여성 3명을 대상으로 나홀로 여행이 어떠한 속성을 지니고 있는지 밝히고 나홀로 여행이 가지고 있는 의미와 특성을 고찰하였다. 뿐만 아니라 최근 우리나라에 불고 있는 나홀로 여행족에 대한 열풍이 새로운 관광콘텐츠로서 지속성을 가질 수 있는지에 대해서도 검토하였다.

• Proceedings of the KAIS Fall Conference
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• 2010.05b
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• pp.681-684
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• 2010

Augmented Scale은 모던한 사운드의 스케일로서 현대 재즈에서 종종 사용되고 있다. 본 연구에서는 재즈 피아니스트 비안(Vian)의 작품 "Wilderness"에서 이 스케일을 멜로디와 화성에 어떻게 적용했는지 살펴본다. 무엇보다도 이 곡의 솔로 형식(solo form)에서 즉흥연주(improvisation)를 위한 재즈 라인 (jazz line)을 어떻게 접근할 것인지 연구한다.

• Journal of Digital Convergence
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• v.16 no.9
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• pp.239-245
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• 2018

In the current mainstream pop music scene, Stevie ray vaughan's status is a singer-songwriter and electric blues guitarist, who occupies a very large position despite his short period of activity. His influence has remained to the present day as the voice of many guitarists ranging from his unique sound to his explosive stage performances. Let's take a look at the technical parts of his performance, rhythm and solo performances, among the various traces of his constant reproduction. Based on one of his most famous works, 'Pride and Joy' I analyzed the solo and rhythm, scale that Stevie Ray Vaughan played. Through the African American blues, a peripheral heritage he has been trying to influence and influence, how his traces congregate in the center of today's mainstream pop music scene. This will give us little clues to appreciate before the research that will have a variety of influences and values.