스크린 프린팅법을 이용한 고온 초전도 후막제작

강형곤,임성훈,이재윤,이현수,한병성 전북대학교 공업기술연구소 1998 工學硏究 Vol.29 No.-

Superconducting thick film was fabricated on Y211 substrate by screen printing method. In this study, 3BaCuO_2 + 2CuO, Y_2O_3+L(BaO+CuO), and Y_2O_3+L(BaO+Cuo)+Ag were used as an ink, respectively. After sintering for 10min. at 970℃, 3 hours at 940℃, and 6 hours at 460℃, the characteristics of smples were measured by SEM and X-ray. Superconducting characteristics of 3BaCuO_2 +2CuO sample were better than others. And others were considered to require higher sintering temperature.

의료영상의 신경생태학적 분석 및 모델링을 위한 Web 기반 시스템의 개발

강형곤,이현운,손재기,전준철 경기대학교기초과학연구소 1998 기초과학논문집 Vol.11 No.-

백내장 환자의 시기능지표 : 사전 연구를 중심으로 Pilot study

강형곤,박은철,최윤정,김한중,홍영재,조우현,손명세,임승정 한국의료QA학회 1998 한국의료질향상학회지 Vol.5 No.1

Background : There is increased recognition that rigorous approach to functional assessment will complement the assessment of clinical status. This study is to develop the appropriate visual function index in Korean patients with cataracts by the assessment of the reliability, validity of visual function indexes including VF-14. Methods : An prospective study was performed with 92 patients who had undergone either one eye or both eye cataract surgery by 3 ophthalmologists practicing at a university-hospital. Patients were interviewed, and clinical data were obtained. Doctors were questioned with self-entered questionnaire forms. Medical record was examined to understand surgery-process. The survey was conducted at 1-2 days before cataract surgery. Results : We used following measures : 7 visual function indexes, global measures of patients' trouble and satisfaction with vision, and best-corrected visual acuity (VA) in each eye. 7 visual function indexes showed a high internal consistency reliability (Cronbach's alpha coefficients ≥0.86). The better visual acuity(operated eye. better eye), the higher patient satisfaction with vision, the lower symptom score, the lower patient trouble with vision was correlated with preoperative visual function index scores. Among 7 indexes, VF-12 with the exclusion of 2 items drivings from VF-14 is a high Cronbach's alpha coefficient and correlation coefficient and the highest R². Conclusion : We conclude that VF-12 is reliable and valid in Korea. So we suggest that in Korea, all items of VF-14, the visual function index, which is in use internationally, ought to be surveyed and VF-12 which has been excluded by 2 items of drivings from VF-14 ought to beused for analysis.

헬스케어 웨어러블 기업의 베이비붐 세대 수용 증진 방안에 대한 연구

강형곤,한세미,김은혜,정우식 한국기업경영학회 2020 기업경영연구 Vol.27 No.4

우리나라의 가파른 고령화 현상은 베이비붐 세대가 고령층에 진입하면서 그 속도가 더 빨라질 것으로 예상된다. 고령화에 따라 다양한 문제가 발생하게 되는데, 그 중 가장 시급한 문제 중 하나는 진료비 상승이다. 이 문제를 해결하기 위하여 디지털 기술을 활용하는 방안들이 주목받고 있으며, 일상에서 가장 쉽게 접할 수 있는 기술 중 하나로 헬스케어 웨어러블 기기를 들 수 있다. 하지만 베이비붐 세대를 포함한 중장년층의 웨어러블 기기 수용률은 높지 않은 편이다. 베이비붐 세대의 웨어러블 기기 수용을 증진하기 위해서는 이들이 필요로 하는 속성을 가진 웨어러블 기기가 베이비붐 사용자 관점에서 개발될 필요가 있으며, 웨어러블 기기의 수용에 영향을 미치는 사용자 특성에 대한 이해가 필요하다. 따라서 본 연구는 베이비붐 세대가 웨어러블 기기에 대하여 어떤 가치를 인식하는지 탐색하고, 지각된 가치와 베이비붐 사용자의 특성이 웨어러블 기기 수용에 어떠한 영향 을 미치는지를 연구함으로써, 베이비붐 세대의 수용률을 높이기 위한 헬스케어 웨어러블 기기 개발 방향을 제안 하기 위하여 진행되었다. 문헌을 기반으로 지각된 가치(유용성, 편의성, 정보, 안심, 비용절감)와 사용자 특성이 헬스케어 웨어러블 기기의 수용의향에 미치는 영향에 대한 총 10개의 가설이 도출되었으며, 가설 검증을 위하여 300명의 베이비붐 세대를 대상으로 면대면 인터뷰를 진행하였다. 수집된 데이터 분석결과, 유용성, 정보, 비용절감 가치는 헬스케어 웨어러블 기기의 수용에 영향을 미치지만, 편의성과 안심 가치는 영향을 미치지 않는 것으로 나타났다. 또한 개인적 특성 중 혁신성향과 소득수준이 유의한 영향을 미치는 것으로 나타났으나, 소득수준은 부(-)의 영향을 주어 가설과 반대되는 결과를 보였다. 이와 같은 분석결과를 기반으로 베이비붐 세대 대상의 헬스케어 웨어러블 기기 개발에 있어 학술적 및 실무적 시사점을 제시하고 추후 연구 방향을 서술하였다. Steep aging phenomenon in Korea is expected to accelerate faster as the baby boomers enter the elderly. Various challenges may occur with aging, and one of the most serious challenges is rising medical expenses. In order to solve this problem, using digital technology is received attention, and one of the most popular technologies is a healthcare wearable device. However, the acceptance rate of wearable devices among the middle-aged, including the baby boomers, is not high. To encourage the acceptance of wearable devices of the baby boomers, it should be developed in the users’ perspective to have attributes which users need. In addition, users characteristics which may influence acceptance of wearable device should be understood. Therefore, this study aims to promote baby boomers’ adoption of healthcare wearable devices by exploring what values the baby boomers perceive about wearable devices and how perceived values and users characteristics affect wearable device adoption. Based on the literature, a total of 10 hypotheses were derived about the effects of five perceived values (usefulness, convenience, information, cost saving, and reassurance) and user characteristics on the intention to accept healthcare wearable devices. To examine the hypotheses, face-to-face interview were conducted with 300 baby boomers. The results show that usefulness, information, and cost-saving values affect the acceptance of healthcare wearable devices, but convenience and reassurance values do not. In addition, among user characteristics, innovativeness and income level were found to have a significant effect, but income level had negative effect, which reject the hypothesis. Based on the results, the implication for developing healthcare wearable devices for the baby boomers were proposed and directions for further research were presented.

애플리케이션 활용을 통한 작업 효율성 증가에 대한 연구

강형곤 한국인쇄학회 2020 한국인쇄학회지 Vol.35 No.1

본 연구에서는 인쇄 준비 시간 및 용지 사용량을 줄일 수 있는 방법을 찾아 인쇄 산 업의 변화 중의 하나인 소량 다품종 인쇄를 기존 전통 방식의 인쇄 장치로 대응하기 위해 인쇄 장치 애플리케이션 중 CIP 옵션, 인쇄 장치 캘리브레이션, 자동 측정 장치를 활용하였다. 본 연구에 대한 타당성을 확인하기 위해 인쇄물의 색 관리의 균일성과 정 확성이 유지되는 상태에서 인쇄 준비 시간 및 용지 사용량을 비교 분석하였다. 이 결과 는 인쇄 품질의 색 관리 기준 안에서 인쇄 장치 애플리케이션을 활용하여 인쇄 준비 시간 및 용지 사용량을 줄일 수 있는 기초 자료로 활용할 수 있다. In this study, printing device applications was utilized, such as CIP option, press calibration and automatic measurement, in order to cope with the traditional printing device for small quantity and multi-product printing, one of the changes in the printing industry, in search of ways to reduce print makeready time and waste paper usage. In order to confirm the validity of this study, print makeready time and waste paper usage were compared and analyzed while maintaining uniformity and accuracy of color management of prints. This result can be used as a basis for reducing print makeready time and waste paper usage by utilizing the printing device applications, such as CIP option, press calibration and automatic measurement, within the color management criteria of print quality.

반복측정된 자료에 대한 새로운 지속성 지수

강형곤,김병수 한국통계학회 1997 응용통계연구 Vol.10 No.1

반복측정된 자료에 있어 어떤 특성이 시간의 경과에 따라서 계속적으로 일정수준을 유지할 경우 지속성 현상이 있다고 한다. 만성질환의 위험요인이 지속성 현상을 갖는다면 조기에 위험요인에 대한 처치를 통하여 만성질환을 예방할 수 있으므로 역학 연구에서 지속성을 규명하는 것은 매우 중요하다. 본 연구에서는 지속성을 전체 관찰시점을 통한 일치도 및 시간의 경과에 따른 유지도를 정의하고 반복측정된 자료로부터 지속성 현상을 설명할 수 있는 새로운 지속성 지수를 제안하였다. 모의실험을 통하여 제안통계량과 지속성 지수로 널리 이용되는 McMahan의 지수를 비교하여 본고에서 제안한 지수가 더 높은 검정력을 나타내고 있는 것을 관찰하였다. 또한 제안통계량을 실제 자료에 적용해 본 결과, 제안통계량은 지속성 현상을 적절하게 설명함을 보았다. The primary purpose of this study is to develop a measure of tracking by using a modified kappa statistic. Understanding tracking phenomena in epidemiologic studies is quite important, because precautionary measure can be made in the early stage of the outcome event. Several authors proposed measures of tracking. Among them we compared ours against McMahan's using a simulation study. Finally we applied our procedure and McMahan's to real data. We may conclude that our statistic is adequate in explaining and detecting the tracking phenomenon.

플라즈마 식각을 이용한 초전도 자속 흐름 트랜지스터

강형곤,고석철,최명호,한윤봉,한병성 한국전기전자재료학회 2003 전기전자재료학회논문지 Vol.16 No.5

The channel of a superconducting flux flow transistor has been fabricated with plasma etching method using a inductively coupled plasma etching. The ICP conditions then were ICP Power of 450 W, rf chuck power of 150 W, the pressure in chamber of 5 mTorr, and Ar : Cl$_2$=1:1. Especially, over the 5 mTorr, the superconducting thin films were not etched. The channel etched by plasma gas showed the critical temperature over 85 K. The critical current of the SFFT was altered by varying the external applied current. As the external applied current increased from 0 to 12 mA, the critical current decreased from 28 to 22 mA. Then the obtained trans-resistance value was smaller than 0.1 $\Omega$ at a bias current of 40 mA.

애플리케이션 활용을 통한 작업 효율성 증가에 대한 연구

강형곤 한국인쇄학회 2020 한국인쇄학회 학술대회 Vol.2020 No.11

Due to the development of digital technology, in order to copy with small quantity and mulit-product prints, a traditional printing companies are rapidly entering aggressive unit price competition. .One of the ways to actively copy with it, by utilizing the applications if the existing traditional printing equipments, which are being advanced, is intneded to strengthen unit price competitiveness, increase uniformity and accuaracy of print quality and quantify print quality. Production cost while maintaining the uniformity and accuracy of the existing print quality by utilizing a various functions as well as the function of simply passing the ink key value to the printing equipment using PPF data, one of the CIP options that we are currently using most commonly, It aims to provide opportunities for a traditional printing companies to actively seek alternatives and intensifyng unit price competition. I hope that it will help you to accurately understand the use of applications that are becoming more sophisticated, identify the advantages and disadvantages that can be obtained by using them and actively replace them. Based on an accurate understanding through the use of these applications, I hope that the introduction of digital printing equipment and the grafting of advanced technologies such as smart factories, etc., are faithfully implemented, while proactive measures are taken to quantify the print quality through objectification and standardization of print quality

새로운 ICP 장치를 이용한 고온 초전도체의 Dry Etching과 기존의 Wet Etching 기술과의 비교

강형곤,임성훈,임연호,한윤봉,황종선,한병성 한국전기전자재료학회 2001 전기전자재료학회논문지 Vol.14 No.2

In this report, a new process for patterning of YBaCuO thin films, ICP(inductively coupled plasma) method, is described by comparing with existing wet etching method. Two 100㎛ wide and 2mm long YBaCuO striplines on LaAlO$_3$ substrates have been fabricated using two patterning techniques. And the properties were compared with the critical temperature and the SEM photography. Then, the critical temperatures of two samples were about 88 K, but the cross section of sample using ICP method was shaper than that using the wet etching method. ICP method can be used as a good etching technique process for patterning of YBaCuO superconductor.

조영증강 CT상 대장벽 이상비후를 일으킨 질환의 진단 : 염증성질환과 종양의 감별

강형곤 대한영상의학회 1993 대한영상의학회지 Vol.29 No.6

The computed tomographic (CT) findings of fourteen patients with inflammatory disease and 28 with neoplasm, who had an abnormal colonic wall thickening, were retrospectively studied to establish CT criteria for each disorder in differentiating inflammatory from neoplastic lesions. According to homogeneity, density and contour of mural thickening and pericolic inflammatory change in enhanced CT scans, we classified colonic wall abnormalities into 6 patterns : 1)multilayering with inner and outer hyper and middle hypodensities, II)homogenously hyperdense with pericolic inflammatory change, III) heterogeneously hyperdense with pericolic inflammatory change, IV) homogeneously hyperdense with lobulated contour, V) heterogeneously hypodense with lobulated contour and VI) heterogeneously mixed densities with irregular lobulated contour, Type I, II, and III were distinctively identified in inflammatory disease, type IV, V in neoplasm, and type VI in both diseases. We conclude that enhanced CT could be helpful in the initial diagnosis and / or suggestion of abnormal colonic wall diseases and differentiation of inflammatory from neoplastic diseases.