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폐 플라스틱의 친환경 업사이클링을 위한 3D프린터 기술개발
이일형(IL-hyung Lee),정호석(Ho-seok Chung),조성진(Seong-jin Cho) 한국기술혁신학회 2017 한국기술혁신학회 학술대회 발표논문집 Vol.2017 No.11
현재 3D프린터의 원료는 대부분 필라멘트를 사용하고 있는데 가격이 고가인 점과 제작 시간의 문제점으로 3D프린팅 하는데 많은 제약이 따르고 있다. 또한, 원료를 재생 및 재활용하는 3D프린터는 현재까지는 없다. 특히 대형 출력물은 많은 원료가 투입되어야 하기 때문에 제조단가가 상승하고, 그에 따른 3D프린터의 보급과 서비스 확장에도 한계가 있다. 본 연구에서는 현재 재활용되고 있는 플라스틱 소재를 재활용할 수 있는 3D프린터 시스템의 기술개발과 응용서비스를 분석하였다.
전립선특이항원 및 전립선암 조기검진에 대한 대국민 인식조사 설문 결과
편종현(Jong Hyun Pyun),강석호(Seok Ho Kang),김지연(Ji Youn Kim),신재은(Jae Eun Shin),정인갑(In Gab Jeong),김종욱(Jong Wook Kim),노태일(Tae Il No),오종진(Jong Jin Oh),유지형(Ji Hyung Yu),정호석(Ho Seok Chung),전성수(Seong Soo Jeon) 대한비뇨기종양학회 2020 대한비뇨기종양학회지 Vol.18 No.1
Purpose: To assess awareness of prostate cancer and prostate cancer screening in high risk Korean men 40 years and older. Materials and Methods: The Korean Urological Oncology Society implemented an online survey of 600 men aged 40 years or older from July 30 to August 6, 2019 to ask questions about prostate cancer and screening. Results: Of the 600 respondents, 96.5% (579 of 600) were aware of prostate cancer and 49.8% (299 of 600) thought they were at risk. Men in their 60s, men with a family history and men with urological conditions were more concerned about prostate cancer. Most respondents (83.3%, 500 of 600) had never received prostate cancer screening. When asked why they had not, (multiple choices: first, second and third priority), the most common responses were: “They had no symptoms of prostate cancer”; “They were in good health”; “Cost burden of screening”; and “They thought screening was included in the National Health Examination Program.” Only 9.7% (58 of 600) were aware of prostate-specific antigen (PSA). After being informed about PSA, 97.7% (586 of 600) wanted it to be included in national cancer screening. Conclusions: In this survey, 96.5% of respondents were aware of prostate cancer, and 44.2% recognized the need for early screening. However, only 16.7% had received screening. Awareness of prostate cancer risks tended to be high in elderly people, people with a family history and people with urological conditions. The results also indicate that there is support for national-level management and early screening programs for prostate cancer.
샤임플러그 사진기로 측정한 전면각막곡률값과 총각막곡률값 차이에 따른 인공수정체 도수 계산
김중희(Joong Hee Kim),조경진(Kyong Jin Cho),정호석(Ho Seok Chung) 대한안과학회 2021 대한안과학회지 Vol.62 No.9
목적: 전면각막곡률값과 총각막곡률값 차이에 따른 도수 오차를 조사하여 두 각막곡률값 차이의 기준치를 정하고, 총각막곡률값 적응증에 대하여 알아보고자 하였다. 대상과 방법: 본원에서 백내장수술을 받은 환자를 대상으로 고리 2 mm, 3 mm, 4 mm에서 Pentacam?瑛막? Sagittal power와 Total refractive power를 측정했으며 각각의 절대오차를 구하였다. 두 각막곡률값의 차이값과 각 절대오차와의 상관성을 분석하였으며 고리 3 mm에서 두 각막곡률값의 차이를 기준으로 나누어 소그룹 분석을 시행하였다. 결과: 모든 고리에서 Sagittal power가 Total refractive power보다 컸으며, 고리 2 mm, 4 mm에서 Total refractive power를 적용한 절대오차가 유의하게 크게 나타났다(p<0.001). 모든 고리에서 두 각막곡률값의 차이와 Sagittal power를 적용한 절대오차는 양의 상관관계를 보였다(p<0.001). 두 각막곡률값의 차이가 0.6 이하인 군에서는 모든 고리에서 Sagittal power를 적용하였을 때 정확하였으나(p<0.001), 0.6 초과인 군에서는 고리 3 mm에서 Total refractive power를 적용하였을 때 정확하였다(p=0.028). 결론: 두 각막곡률값의 차이가 클수록 Sagittal power를 적용한 절대오차가 크게 나타났으며 두 각막곡률값의 차이가 0.6을 초과하는 경우, 고리 3 mm에서 측정한 Total refractive power를 적용하는 것이 Sagittal power를 적용하는 것에 비하여 정확하였다. Purpose: We investigated the change in the absolute error according to the difference between anterior and total keratometry, to determine the criterion for the difference in keratometry, and to determine the indication for using total keratometry. Methods: Sagittal and total refractive power were measured with 2-, 3-, and 4-mm Pentacam?? rings, and the absolute error of each was calculated in patients who underwent cataract surgery in our hospital. The correlation between the difference value the sagittal minus the total refractive power and each absolute error was analyzed by simple regression analysis. The analysis was performed by dividing the patients into two groups based on 0.6, which is the average of the difference between the sagittal and total refractive power for the 3-mm ring. Results: Sagittal power was larger than total refractive power for all rings and the absolute error obtained by applying the total refractive power was larger than the sagittal power for the 2- and 4-mm rings (p < 0.001). The simple regression analysis revealed that the absolute error using sagittal power was positively correlated with the difference between sagittal power and total refractive power. In the group with less than 0.6, the absolute error using the total refractive power of all rings was larger than the sagittal power (p < 0.001). In the group exceeding 0.6, the absolute error using the total refractive power was less than using the sagittal power for the 3 mm ring (p = 0.028). Conclusions: The greater the difference between sagittal and total refractive power, the greater the absolute error using sagittal power. Accuracy was higher in the group exceeding 0.6 after applying total refractive power measured at the 3 mm ring compared to sagittal power.
하윤석(Yun-Sok Ha),김광택(Kwang Taek Kim),남욱(Wook Nam),박홍주(Hongzoo Park),유상준(Sangjun Yoo),이찬호(Chan Ho Lee),정호석(Ho Seok Chung),최우석(Woo Suk Choi),김지연(Jiyoun Kim),신재은(Jaeeun Shin),김정현(Jeong Hyun Kim),곽철(Cheol 대한비뇨기종양학회 2021 대한비뇨기종양학회지 Vol.19 No.3
Purpose: The survey was conducted on Korean men to examine information acquisition channel for prostate cancer high risk group as part of the “Blue Ribbon Campaign” of the Korean Urological Oncology Society. Materials and Methods: An online survey of 500 men aged 50 years old or older was completed to query investigation of the status of prostate cancer awareness and information acquisition from February 4 to February 9, 2021. Results: Most men in their 50s and older are well aware that prostate cancer can also occur in young men in their 40s, so the rate of misunderstanding of the timing of prostate cancer screening after their 60s is very low. Two-thirds of all respondents (67.2%) were also confirmed that prostate cancer had no initial symptoms and was not included in the national cancer screening. Seventy-five percent of people look up information on their own in case of suspected prostate cancer, and 51.6% seek out knowledge on their own to prevent prostate cancer. Of the respondents, 27.4% of men contacted prostate cancer-related information within the past year, and the percentage of people contacted through ‘Internet/Phone,’ ‘People Around’ and ‘Television’ was high. The most trusted channel among prostate cancer information channels was ‘medical professionals,’ but the experience rate was not high, and the channel with high experience rate and reliability was shown as ‘television.’ Conclusions: Much effort is still needed to understand the information acquisition behavior of Korean men and to improve awareness of early screening for prostate cancer.