Ethylene Oxide 처리와 Gamma 선 조사가 건조 농산물의 품질에 미치는 영향

김영재,양재승,조한옥,권중호,변명우 한국식품위생안전성학회 1986 한국식품위생안전성학회지 Vol.1 No.2

Gamma irradiation as a new physical treatment was applied to comparative researches with a conventional chemical fumigant on the microbiological and physicochemical qualities of selected agricultural products such as powdered hot pepper soybean paste, oyster mushroom powder, carrot flake, and raw sesame. The microorganisms contaminated in the sample, including total bacteria, thermophiles, acid tolerant bacteria, fungi, osmophilic molds and coliforms were sterilized with irradiation doses of 7-10 kGy, while ethylene oxide (E.O) fumigation proved insufficient for the destruction of them. An optimum dose of irradiation was less detrimental than E.O. fumigation to the physicochemical properties of the sample. Sensory evaluation after three months of storage at room temperatures showed that the overall acceptability of irradiated sample was higher than that of the nontreated control as well as E.O. fumigated samples.

Evaluation of Semi-automatic Segmentation Methods for Persistent Ground Glass Nodules on Thin-Section CT Scans

김영재,Seunghyun Lee,박창민,Kwang Gi Kim 대한의료정보학회 2016 Healthcare Informatics Research Vol.22 No.4

Objectives: This work was a comparative study that aimed to find a proper method for accurately segmenting persistent ground glass nodules (GGN) in thin-section computed tomography (CT) images after detecting them. Methods: To do this, we first applied five types of semi-automatic segmentation methods (i.e., level-set-based active contour model, localized region-based active contour model, seeded region growing, K-means clustering, and fuzzy C-means clustering) to preprocessed GGN images, respectively. Then, to measure the similarities, we calculated the Dice coefficient of the segmented area using each semiautomatic method with the result of the manually segmented area by two radiologists. Results: Comparison experiments were performed using 40 persistent GGNs. In our experiment, the mean Dice coefficient for each semiautomatic segmentation tool with manually segmented area was 0.808 for the level-set-based active contour model, 0.8001 for the localized region-based active contour model, 0.629 for seeded region growing, 0.7953 for K-means clustering, and 0.7999 for fuzzy C-means clustering, respectively. Conclusions: The level-set-based active contour model algorithm showed the best performance, which was most similar to the result of manual segmentation by two radiologists. From the differentiation between the normal parenchyma and the nodule, it was also the most efficient. Effective segmentation methods will be essential for the development of computer-aided diagnosis systems for more accurate early diagnosis and prognosis of lung cancer in thin-section CT images.

New Parametric Imaging Method with Fluorescein Angiograms for Detecting Areas of Capillary Nonperfusion

김영재,정창부,황정민,양희경,이승현,김광기 대한의료정보학회 2014 Healthcare Informatics Research Vol.20 No.3

Objectives: Fluorescein angiography (FAG) is currently the most useful diagnostic modality for examining retinal circulation, and it is frequently used for the evaluation of patients with diabetic retinopathy, occlusive diseases, such as retinal venous and arterial occlusions, and wet macular degeneration. This paper presents a method for objectively evaluating retinal circulation by quantifying circulation-related parameters. Methods: This method allows the semiautomatic preprocessing and registering of FAG images. The arterial input function is estimated from the registered set of FAG images using gamma-variate fitting. Then, the parameters can be computed by deconvolution on the basis of truncated singular value decomposition, and they can finally be presented as parametric color images in a combination of three colors, red, green, and blue. Results: After the estimation of arterial input function, the parameters of relative blood flow and mean transit time were computed using deconvolution analysis based on truncated singular value decomposition. Conclusions: The parametric color image is helpful to interpret the status of retinal blood circulation and provides quantitative data on retina ischemia without interobserver variability. This system easily provides the status of retinal blood circulation both qualitatively and quantitatively. It also helps to standardize FAG interpretation and may contribute to network-based telemedicine systems in the future.

한국 역대 정부의 방역행정에 관한 소고

김영재 한국행정학회 2022 한국행정학회 학술발표논문집 Vol.2022 No.2

한국 박사인력 실태 분석에 관한 소고

김영재,이주호,안정석,박연옥 한국취업진로학회 2015 취업진로연구 Vol.5 No.3

한국 박사인력에 관한 실태 분석에서 본 연구의 목적은 인력 양성 단계인 박사과정과 인력 활용 단계인 박사학위 소지자를 살펴보고 정책적 제언을 하는데 있다. 박사인력의 특성을 개인적 차원과 구조적 차원으로 나누어 왜 박사인력에 대한 실태 분석이 필요한지 알아보았다. 선행연구의 시사점으로는 박사과정 교육 개편과 취업진로 프로그램 필요, 박사인력 통계의 사전 제공, 전공별 취업 안내와 지원 필요, 박사인력 근무 환경 조성 등의 정책적 제언으로 정리할 수 있었다. 이러한 연구는 세부 영역별로 목적과 내용에 차이가 있었지만 정책적 시사점은 유사했다. 2014년 박사인력 통계를 바탕으로 대학원과 대학원생 인원 증가, 대학원별 차이, 전공별 특성, 여성 박사인력에 대해 살펴보았다. 대학원과 박사인력 현황을 분석한 결과는 다음과 같다. 일단 고등교육기관과 대학원 인원의 급격한 팽창이 가장 큰 원인이었다. 사회 변화에 따른 고학력 수요 증가로 일반대학원과 전문대학원의 박사인력은 최근 몇 년 간 증가 추세로 구조적 문제가 전반적인 원인이라고 볼 수 있다. 이에 해당 분야의 연구개발교육 전문가인 박사인력의 개인적 차원의 문제와 연결해 정부의 역할이 필요하다. 정책적 제언으로는 첫째, 정부가 한국의 박사인력 실태를 최대한 세밀하게 파악해 통계자료를 구축해야 한다. 둘째, 박사인력의 구조적 문제를 해결하는 방법은 고용 시장 확대와 인력 활용이 가능한 직장을 마련하는 것이다. 셋째, 정부・기업・대학이 전공별로 진로취업 관련 프로그램을 박사과정 시기부터 체계적으로 운영할 필요가 있다. 넷째, 박사인력이 적재적소에서 자신의 능력을 잘 발휘할 수 있도록 정부나 기업이 일정한 역할을 해야 한다. 이로서 박사인력 개인의 삶의 질을 향상하는 동시에 결과적으로 국가경쟁력을 강화하는데 기여할 수 있다. The purpose of this study was to analyze of doctor haman capital statue in Korea. I examine the training course and doctoral degree of workforce. I propose policy about doctor haman capital statue improvement. I divide characteristics of the personal dimension and the structural dimension investigate why the need for Dr Analysis. The difference in objectives and detailed information for each dimension but policy implications were similar to prior research. Based on 2014 statistics, graduate and doctor increases personnel, graduate differences were analyzed for the majors characteristic, female doctoral personnel. The government take advantage of doctor development policy, it is important to prepare personnel unemployment and appropriate measures on the structural unemployment. It is implemented current government employment policy target of lower unemployment. But government should pursue doctoral training and utilization different perspective. Korea Graduate School has rapidly increased quantitative doctorate degree holders 10,000 people per year. The government manages them and describes in time. We pay attention to personally doctor policy between improved national competitiveness and aspects to the quality of life. First, the government is possible to build the statistics about doctor statue. Second, how to resolve the structural problems of doctor is to utilized employment and labor market expansion. Third, governments, corporations and universities are necessary to operate systematically career employment-related programs as majors. Fourth, doctor personnel should play a role governments or companies can show their ability to make good on the loading place. It is different to manage doctor major course. There is also a need to find the reason for that difference in overall statistics and statistics to women. How the actual matches of workforce and Major duties. It is to establish whether any changes to existing work or duties will be helping to assess the value of the doctorate. It is a mid to long-term perspective that government is contemplating the use of positive measures. As a result, doctor workforce can contribute to strengthen the national competitiveness while at the same time improving the quality of life.

Development of a thermodynamic performance-analysis program for CO2 geothermal heat pump system

김영재,장근선 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6

In this research, a steady-state cycle simulation program for thermodynamic performance analysis of CO2 geothermal heat pump systems was developed. A series of case studies were conducted by changing system parameters and operation conditions in order to investigate the effect of various system variables on the geothermal heat pump cycle including an internal heat exchanger (IHX). The simulation results were validated by comparing them with experimental data. The mean deviations of the COPs, cooling capacities, and compressor powers between experimental and simulation results are 4.5%, 3.8%, 6.5%,respectively at the 5 8C superheated degree and 32% EEV opening.

교정치료를 위한 스캔 데이터 간 디지털 정합 기술의 활용

김영재,김종윤,신희진 대한치과교정학회 2020 대한치과교정학회 임상저널 Vol.10 No.4

The purpose of this article was to discuss the necessity of using digital merging data sets and the method of alignment between cone-beam computerized tomography (CBCT) and other scan data including the intraoral scan and 3D facial scan. To improve the alignment accuracy, it is important to understand the pros and cons of various alignment methods. Also, this article introduces some clinical tips for using digital merging data sets. There has been controversy regarding the efficiency and accuracy of digital orthodontic protocol. With the knowledge of digital technic and proper strategies for clinical trials, digital orthodontics will become more accurate and efficient.

화엄밀교적 원형으로서의 오대산 만다라

김영재 한국불교학회 1999 韓國佛敎學 Vol.25 No.-

지방자치와 교육감 현황에 관한 소고

김영재 한국행정학회 2022 한국행정학회 학술발표논문집 Vol.2022 No.1

향사 박귀희 『가야금병창곡집』에 담긴 이야기

김영재 한국전통공연예술학회 2014 한국전통공연예술학 Vol.3 No.-