중소규모 지방 대학의 MOOC 활성화 방안 연구

정우용(Wooyong Jung),오원근(Wongeun Oh) 한국융합예술치료교육학회 2021 예술과 인간 Vol.7 No.-

본 연구는 국내외 고등교육 연구 및 대학 동향 분석을 통해서 지방 대학이 추구하는 MOOC의 방향을 제시하고 대학에 적합한 MOOC의 모형을 단계별로 제안한다. 코로나 바이러스로 인해 비대면 교육이 급격하게 활용되고 있는 이 시점에서 인터넷을 활용한 교육은 점차 더 확대될 전망이며, 코로나 이후에도 많은 부분에서 지금보다 더 높은 이용률을 나타낼 것으로 전망된다. 이러한 환경에서 대학의 교육 환경에 적합한 MOOC 플랫폼과 경쟁력 있는 컨텐츠를 구축하기 위해 국내외 MOOC 플랫폼의 동향과 장단점에 대해 알아보고 이를 기반으로 지방에 위치한 중소 규모 대학의 MOOC 구축 및 활용을 위한 추진 방향과 절차에 대해 고찰하였다. MOOC는 장점도 있지만 비대면으로 인한 단점도 존재한다. 전통적으로 대면 교육을 해왔던 대학에서 비대면 교육의 장점을 흡수해서 경쟁력있는 새로운 대학으로 발전하기 위해서는 각 대학의 실정에 맞는 효율적인 MOOC 체계의 구축이 필수적이며, 본 연구는 이러한 연구의 기초 자료로 활용될 수 있을 것이다. This study presents the direction of MOOC pursued by local universities through domestic and international higher education trend analysis. And we propose a model of MOOC suitable for local universities step by step. Recently, non-face-to-face education has been rapidly used due to the coronavirus, and it is expected to increase even after COVID-19. In order to build MOOC platforms and competitive contents suitable for the university"s educational environment, the trends, advantages, and disadvantages of MOOC platforms are investigated. Then, the direction and procedure for the establishment and utilization of MOOCs of small and medium-sized universities located in the provinces were considered. Although MOOC has advantages, there are also disadvantages due to non-face-to-face communication. Universities have traditionally provided face-to-face education. In order to absorb the advantages of non-face-to-face education and make a competitive education system, it is essential to establish an efficient MOOC system suitable for each university"s situation. This study can be used as basic data for these studies.

Homogeneity Evaluation of Geopolymer Waste Form Containing Radioactive Spent Ion Resins Using LIBS and Statistical Approach

Seokyoung Oh,Byoungkwan Kim,Jaehyuk Kang,Hyun-min Ma,Younglim Shin,Wooyong Um 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1

The homogeneity of radioactive spent ion exchange resins (IERs) distribution inside waste form is one of the important characteristics for acceptance of waste forms in long-term storage because heterogenous immobilization can lead to the poor structural stability of waste form. In this study, the homogeneity of metakaolin-based geopolymer waste form containing simulant IERs was evaluated using a laser-induced breakdown spectroscopy (LIBS) and statistical approach. The cation-anion mixed IERs (IRN150) were used to prepare the simulant spent IERs contaminated by non-radioactive Cs, Fe, Cr, Mn, Ni, Co, and Sr (0.44, 8.03, 6.22, 4.21, 4.66, 0.48, and 0.90 mg/g-dried IER, respectively). The K2SiO3 solution to metakaolin ratio was kept constant at 1.2 and spent IERs loading was 5wt%. For the synthesis of homogeneous geopolymer waste form, spent IERs were mixed with K2SiO3 solution and metakaolin first, and then the fresh mixture slurry was poured into plastic molds (diameter: 2.9 cm and height: 6.0 cm). The heterogeneous geopolymer waste form was also fabricated by stacking two kinds of mixtures (8wt% IERs loading in bottom and 2wt% in top) in one mold. Geopolymers were cured for 7d (1d at room temperature and 6d at 60°C). The hardened geopolymers were cut into top, middle, and bottom parts. The LIBS spectra and intensities for Cs were obtained from the top and bottom of each part. Cs was selected for target nuclide because of its good sensitivity for measurement. Shapiro-Wilk test was performed to determine the normality of LIBS data, and it revealed that data from the homogeneous sample is normal distribution (p-value = 0.9246, if p-value is higher than 0.05, it is considered as normal distribution). However, data from the heterogeneous sample showed abnormal distribution (p-value = 7.765×10-8). The coefficient of variation (CoV) was also calculated to examine the dispersion of data. It was 31.3% and 51.8% from homogeneous and heterogeneous samples, respectively. These results suggest that LIBS analysis and statistical approaches can be used to evaluate the homogeneity of waste forms for the acceptance criterion in repositories.

IMU 센서를 활용한 도저 Lift/Tilt Assist 제어 시스템 개발

오윤성(Yunseong Oh),임진우(Jinwoo Lim),이건호(Geonho Lee),정우용(Wooyong Jung) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11

Solidification of Radioactively Contaminated Soils Using Cement Waste Forms

Hyun-min Ma,Byoungkwan Kim,Jaehyuk Kang,Seokyoung Oh,Younglim Shin,Wooyong Um 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1

The soils contaminated with radionuclides such as Cs-137 and Sr-90 should be solidified using a binder matrix, because radioactively contaminated soils pose environmental concerns and human health problems. Ordinary Portland cement has been widely used to solidify various radioactive wastes due to its low cost and simple process. In this study, simulant soil waste was solidified using cement waste form. The soils were collected around ‘Kori Nuclear Power Plant Unit 1’ and they were contaminated with the prepared simulant liquid waste containing Fe, Cr, Cs, Ni, Co, and Mn. The water-to-dry ingredients (W/D) ratio of cement waste form was 0.40. The cement paste was poured into a cubic mold (5×5×5 cm) and then cured for 28 days at room temperature. The 28-day compressive strength, water immersion, and EPA1311-toxicity characteristic leaching procedure (TCLP) tests were performed to evaluate the structural stability of cement waste form. The compressive strength was not proportional to soil waste loading, and the lowest compressive strength (4±0.1 MPa) was achieved in cement waste form containing 50wt% soil waste. After the water immersion test for 90 days, the compressive strength of cement waste form with 50wt% soil waste increased to 7.5±0.6 MPa, meeting the waste form acceptance criteria in the repository. It is believed that long-term water immersion test contributed to the additional curing and hydration reaction, resulting in the enhanced compressive strength. As a result of the TCLP test, the released amount of As, Ba, Cd, Cr, Pb, Se, Co, Cs, and Sr was less than the domestic and international standards. These results imply that cement waste form can be a promising candidate for the solidification of radioactive soil wastes.

PCB-induced Cytotoxicity in Catecholaminergic CATH.a Cells related to Inhibition of NO Production

Kim Jooil,Kang JuHee,Lim HwaKyung,Park InSook,Park Younjoo,Lee SungYong,Oh WooYong,Wang SoYoung,Chung MyeonWoo,Park ChangShin,Kim DongSeop,Choi KiHwan 대한약학회 2002 大韓藥學會 總會 및 學術大會 Vol.2002 No.1

직장암에 대한 수술 전 동시병용 방사선-항암 화학요법

신성수(Seong Soo Shin),안용찬(Yong Chan Ahn),전호경(Ho Kyung Chun,이우용(WooYong Lee),강원기(Won Ki Kang),박영석(Young Suk Park),박준오(Joon Oh Park),송상용(Sang Yong Song),임도훈(Do Hoon Lim, 박원(Won Park),이정은(Jung Eun Lee),강민규 대한방사선종양학회 2003 Radiation Oncology Journal Vol.21 No.2

목 적: 수술 전 동시병용 방사선-항암 화학 요법의 초기 치료성적과 급성 부작용에 대해 알아보고자 하였다. 대상 및 방법: 1999년 6월부터 2002년 4월까지 T3 또는 T4 병기의 직장암으로 진단 받고 완전절제가 어렵거나, 종양이 하부직장에 위치하여 수술 시 항문 괄약근의 보존이 불가능하리라고 예견된 40명의 환자에게 수술 전 동시병용 방사선-항암 화학요법을 적용하여 37명의 환자가 수술전 치료방침을 완료하였다.방사선치료는 전 골반부에 일일 1.8 Gy씩 5주간에45 Gy를 엎드린 자세로 조사하였다. 항암 화학요법은 경구 UFT와 Leucovorin(LV)(12명),정주 5-fluorouracil(FU)와 LV (10명), 정주 5-FU 단독요법(일시 정주 10명, 지속 정주5명)을 각각 시행하였다. 수술은 수술 전 치료 종료후 4˜6주경에 예정하였으며 35명에 대해서 수술을 시도하였다. 결 과: 본 연구의 수술 전 방사선-항암 화학요법에 대한 순응도는 매우 높았다(92.5%, 37/40). 수술 전에 간과폐에 새로운 원격전이가 확인된 2명을 제외한 35명의 환자에서 절제수술을 시도하였고, 22명(62.9%)에서 항문괄약근의 보존이 가능하였으나, 2명(5.7%)은 개복 후 절제수술을 포기하였다. 절제수술을 시행한 33명 중 30명은 육안적 완전절제를, 1명은 육안적 불완전절제를 시행하였으며 2명은 병리소견에 관한 정보를 얻을 수 없었다. 수술 및 병리소견에 근거한 병기하강률은 45.5% (15/33), 절제연 음성 완전절제율은 78.8% (26/33)였다.수술전 방사선치료 도중 급성부작용으로 Grade 3˜4 호중구 감소가 4명(10.8%)에서 발생하였다.절제수술 후 국소재발이 12.1%(4/33), 수술 전 치료방침 완료 후 원격전이는 21.6% (8/37)에서 각각 나타났으며, 3년 생존율은 87%였다. 결 론: 직장암에 대한 수술전 동시병용 방사선-항암 화학요법은 낮은 부작용으로 높은 수술절제율,병기하강률,완전절제율, 항문 괄약근 보존율 등을 얻을 수 있는 효과적인 방법으로 판단되며 앞으로 장기간에 걸친 추적관찰을 요한다. Purpose: To report the early results of preopeartive concurrent radio-chemotherapy (CRCT) for treating rectal cancer. Materials and Methods: From June 1999 to April 2002, 40 rectal cancer patients who either had lesions with a questionable resectability or were candidates for sphincter-sacrificing surgery receivedpreoperative CRCT. Thirty-sevenpatients completed the planned CRCT course. 45 Gy by 1.8 Gy daily fraction over 5 weeks was delivered to the whole pelvis in the prone position. The chemotherapy regimens were oral UFT plus oral leucovorin (LV) in 12 patients, intravenous bolus 5-FU plus LV in 10 patients, and intravenous 5-FU alone in 15 patients (bolus infusion in 10, continuous infusion in 5). Surgery was planned in 4˜6 weeks of the completion of the preoperative CRCT course, and surgery was attempted in 35 patients. Results: The compliance to the current preoperative CRCT protocol was excellent, where 92.5% (37/40) completed the planned treatment. Among 35 patients, in whom surgery was attempted after excluding two patients with new metastatic lesions in the liver and the lung, sphincter-preservation was achieved in 22 patients (62.9%), while resection was abandoned during laparotomy in twopatients (5.7%). Gross complete resection was performed in 30 patients, gross incomplete resection was performed in one patient, and no detailed information on the extent of surgery was available in two patients. Based on the surgical and pathological findings, the down-staging rate was 45.5% (15/33), and the complete resection rate with the negative resection margin 78.8% (26/33). During the CRCT course, grade 3˜4 neutropenia developed in four patients (10.8%). Local recurrence after surgical resection developed in 12.1% (4/33), and distant metastases after the preoperative CRCT start developed in 21.6% (8/37). The overall 3-years survival rate was 87%. Conclusion: Preoperative CRCT in locally advanced rectal cancer is well tolerated and can lead to high resection rate, down-staging rate, sphincter preservation rate, however, longer term follow-up will be necessary to confirm these results.