• Journal of radiological science and technology
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• v.46 no.6
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• pp.535-542
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• 2023

This study aimed to implement a deep learning model that can perform quantitative quality control through ACTS software used for quantitative evaluation of ACR phantom in CT quality control and evaluate its usefulness. By changing the scanning conditions, images of three modules of the ACR phantom's slice thickness (ST), low contrast resolution (LC), and high contrast resolution (HC) were obtained and classified as ACTS software. The deep learning model used ResNet18, implementing three models in which ST, HC, and LC were learned with epoch 50 and an integrated model in which three modules were learned with Epoch 10, 30, and 50 at once. The performance of each model was evaluated through Accuracy and Loss. When comparing and evaluating the accuracy and loss function values of the deep learning models by ST, LC, and HC modules, the Accuracy and Loss of the HC model were the best with 100% and 0.0081, and in the integrated model according to the Epoch value, Accuracy and Loss with epoch 50 were the best with 96.29% and 0.1856. This paper showed that quantitative quality control is possible through a deep learning model, and it can be used as a basis and evidence for applying deep learning to the CT quality control.

• Anxiety and mood
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• v.20 no.1
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• pp.17-26
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• 2024

Objective : The objective of this study is to create questionnaires for Social Capital (SCQ) and Built Environment (BEQ) that can be utilized as protective factors for mental health. Methods : A total of 426 adults aged 18 or older, residing in 'D' Metropolitan City in Korea, were included as subjects in this study. Data for subjective evaluation of social capital and built environment were collected through an online survey. Various statistical analyses, such as reliability analysis, exploratory factor analysis, confirmatory factor analysis, and correlation analysis between PHQ-9 and GAD-7, were conducted. Results : The Cronbach's α values for SCQ and BEQ were 0.94 and 0.90, respectively, indicating good reliability. Exploratory factor analysis revealed that SCQ consisted of 4 factors, explaining a total of 71.91%, while BEQ consisted of 4 factors, explaining a total of 62.18%. Confirmatory factor analysis confirmed that both questionnaires had a reasonable configuration, with TLI, CFI, and RMSEA values at an appropriate level. Additionally, both SCQ and BEQ showed negative correlations with depression and anxiety. Conclusion : This study has developed a tool for measuring social capital and the built environment in Korea. It also demonstrates the reliability and validity of this questionnaire. The use of this tool could greatly support preventive mental health interventions within the community.

• The Korean Journal of Food And Nutrition
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• v.35 no.1
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• pp.1-6
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• 2022

In this study, we developed a healthy snack using dried shrimp powder which is rich in calcium to help prevent bone disease. Different types of yanggaeng were prepared with varying ratios of dried shrimp powder; 1%, 3%, 5%, and 7%. Moisture content, color value, texture properties, and mineral concentration were measured. The L, a, and b chromaticity values showed significant differences in the 5% addition group (p<0.001). The texture properties, hardness, and adhesion decreased significantly as the amount of shrimp powder increased (p<0.001), while chewiness and elasticity significantly increased as the amount increased (p<0.001). Calcium and potassium increased significantly as the amount of shrimp powder increased (p<0.001).

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.1032-1035
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• 2021

본 논문에서는 IoT 기술을 활용한 사용자 맞춤형 보행보조기구 시스템을 제안한다. 아두이노 기반으로 제작하는 맞춤형 보행보조기구는 리니어 액추에이터, 솔레노이드, 블루투스, 가속도 센서 외 다양한 센서들로 기능을 제공한다. 안전한 환경 제공을 위한 야간 조도 조절과 토양 상태 파악을 통한 미끄럼 방지 및 계단 보행보조를 통해 2차 부상 방지를 목적으로 한다. 올바른 사용을 위한 균형 제어와 길이 제어 및 위생 관리가 가능하다. 또한 어플리케이션을 통한 대여시스템을 제공하여 맞춤형 기능을 선택하고 병원에서 환자 정보를 연동하여 편리한 시스템을 개발한다.

• Journal of the Korean Society of Radiology
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• v.15 no.7
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• pp.1049-1056
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• 2021

The purpose of this study was to develop a respiratory synchronization device for X-ray (X-RSD) to increase the reproducibility of inspiration when examining the Chest X-ray of a patient who difficulty in breathing coordination. The X-RSD was self-made using an air pressure sensor and air was injected by connecting a ventilator to the mannequin for CPR. At this time, the amount of injected air was quantified using the SkillReporting device. After placing the X-RSD on the chest of the mannequin, the amount of air was tested in 6 steps from 200 to 700 cc by 100 cc increased. For the accuracy evaluation, the sensitivity of X-RSD was measured by repeating a total of 80 measurements, and the sensitivity was 100%, and very precise results were obtained. After that, the images examined while viewing the X-RSD of the chest lateral examination and the images obtained by the blind examination were compared and evaluated. The lung volume of X-RSD was larger than that of the blind test, and the deviation was smaller. Overall, the use of X-RSD can help with chest X-ray examination of patients who have difficulty in cooperating, and it is thought that it will be possible to contribute to the reduction of exposure dose by reducing the repeat rate of general X-ray examinations.

• Journal of The Korean Ophthalmological Society
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• v.60 no.5
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• pp.470-473
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• 2019

Purpose: To investigate the relationship between dominant eye and refractive error in patients with myopic anisometropia. Methods: This study population consisted of myopes less than 15 years old who were followed up for anisometropia defined as interocular difference of spherical equivalent (SE) ≥1.0 diopter (D). All patients underwent the hole-in-the-card test at far and near to determine ocular dominance. The data were analyzed for statistical significance using Fisher's exact test. Results: A total of 102 eyes in 51 patients were analyzed. The mean age of the patients was 10.4 ± 1.4 years and 54.9% were male. The mean SE was -2.97 ± 1.95 D in the right eye and -3.02 ± 1.92 D in the left eye. The right eye was the dominant eye in 43.1% and 37.3% at distance and near, respectively. The agreement of dominancy between distant and near was 82.4%. The near dominant eyes showed statistically significant accordance with more myopic eyes (p = 0.009). On the other hand, there was no statistically significant relationship between more myopic eyes and distant dominant eyes (p = 0.09). Conclusions: The near dominant eye was more myopic eye in patients with myopic anisometropia. This was considered to be related with the lag of accommodation in dominant eye with near distance.

• 프린팅코리아
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• v.9 no.3
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• pp.38-43
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• 2010

서울특별시인쇄정보산업협동조합(이사장 조정석)은 지난 1월 26일 서울인쇄센터 앞에서 인쇄마을 조성을 위한 서명운동을 전개했다. 조정석 이사장과 김정전 인쇄마을 지정 비상대책 위원회 위원장, 조합 임직원들은 이날 중구 쌍림동부터 인쇄사가 밀집해 있는 방산시장을 비롯하여 필동, 을지로, 충무로 등 전 지역을 두루 다니며 서명운동을 펼쳤다. 서울시가 중구 지역의 재개발을 추진하면서 특화산업으로 지정되어 있는 인쇄산업겁에 대한 대책을 전혀 세우지 않고 있기 때문이다. 특화산업인 인쇄가 발전하기 위해서는 지속적이고 장기적인 안목에서의 지원이 이루어져야 하는데도 서울시는 뉴타운재개발사업에서 인쇄산업을 아예 제외하고 금융산업을 지정한 것은 인쇄인들의 분노를 사기에 충분하다. 이에 인쇄인들은 인쇄업의 미래를 위해 서명운동을 적극 벌이고 있는 것이다.

• 프린팅코리아
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• s.20
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• pp.86-87
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• 2004

파주를 중심으로 한 경기 북부지역으로 인쇄업 진출이 활발하다. 그러나 전국 인쇄업채의 1/3 가량이 몰려있는 서울시 중구 일대가 대한민국 인쇄산업의 본거지임에 틀림이 없다. 상대적으로 열악한 업체의 빈도수가 높다고 하지만 가장 많은 인쇄업체가 밀집돼 있는 중구는 인쇄 및 관련 기자재, 소프트웨어를 납품하는 업체들로서는 결코 놓칠 수 없는 중요한 시장이다. 중구 지역 특히, 충무로와 을지로 일대는 인쇄업체의 높은 빈도 수 탓에 일부 품목의 경우 지역 영업권이 별도로 행사되고 있을 정도이다. 지난 2003년 9월에 개소식을 가진 소프트매직의 '소프트매직 솔루션 체험센터' 라든지 지난 12월에 개소식을 가진 시스템테크놀로지 서비스(주)의 'QuarkXpress Center는 중구 지역이 차지하는 인쇄업에서의 위상을 실감케 하는 곳이라 할 만하다.

• 프린팅코리아
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• v.11 no.9
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• pp.85-85
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• 2012

한솔제지는 지난 8월 21일 이상훈 사장을 비롯한 임직원과 수상자 18명이 참석한 가운데 을지로 본사 23층 Hi-Q홀에서 환경 나눔 캠페인 공모전 시상식을 가졌다. 환경 나눔 공모전은 친환경 재생용지 사용으로 지구도 살리고 소외된 이웃에 나눔을 실천하는 한솔제지 '1% 나눔운동'을 표현하는 광고 및 엠블럼을 선정키 위해 진행됐다. 한솔제지 '1% 나눔운동'은 친환경 재생용지 판매수익금의 1%를 매월 정기적으로 후원하는 프로그램이다.

• The Magazine for Energy Service Companies
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• s.30
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• pp.14-17
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• 2004

시설경비 절감과 국가에너지 절약사업에 일조하기 위해 최근 5년 전부터 에너지절약프로그램을 적극적으로 시행하고 있는 SK텔레콤은 오는 12월에 준공할 예정인 대전 둔산지점 신사옥과 10월 준공예정인 을지로 신사옥 본사에 자사에서는 최초로 ESCO사업을 활용한 에너지 절약설비를 설치했다. 대전 둔산 지점은 ESCO자금 7억2천5백만원으로 빙축열냉방시스템을 설치하고 본사에는 29억8천6백만원을 투입해 흡수식 냉동기, 빙축열시스템을 설치한 것. 이 설비로 인해 각각 연간 약 1억원과 4억원의 에너지절감효과를 기대하고 있다. 부분축열방식을 도입한 대전 둔산지점을 찾았다.