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동물병원의 진단용 방사선 발생장치 및 방사선종사자 안전관리 실태 조사
안효진,김충현,권영진,김돈환,위성환,문진산,An, Hyo-Jin,Kim, Chung-Hyun,Kwon, Young-Jin,Kim, Don-Hwan,Wee, Sung-Hwan,Moon, Jin-San 대한수의학회 2014 大韓獸醫學會誌 Vol.54 No.3
A nationwide survey on radiation safety management in Korean animal hospitals was conducted. By 2013, 53 radiation generators were registered as veterinary medical devices (41 X-ray generators and 12 computed tomography scanners). Additionally there were six approved laboratories for radiation equipment and protection facility, and five approved laboratories for radiation exposure of employees, respectively. By March 2013, 2,030 out of 3,829 animal hospitals operated radiation-generating devices. Among these devices, 389 (19.2%) out of 2,030 were not labeled with the model name and 746 (36.7%) were not labeled with production dates. Thus, most veterinary X-ray generators were outdated (42.6%) and needed replacements. When periodic inspections of 2,018 animal hospitals were performed after revision of the Veterinarians Act in 2011, the hospitals were found to be equipped with appropriate radiation generators and protection facilities. Among 2,545 employees exposed to radiation at the hospitals, 93.9% were veterinarians, 4.3% were animal nurse technicians, and 18% held other positions. Among 169 employees supervised by administrators, none of those had a weekly maximum operating load that exceeded $10mA{\cdot}min$. This study suggests that the radiation safety management system of animal hospitals was general good.
안효진,윤향진,김충현,위성환,문진산,An, Hyo-Jin,Yoon, Hyang-Jin,Kim, Chung-Hyun,Wee, Sung-Hwan,Moon, Jin-San 대한수의학회 2015 大韓獸醫學會誌 Vol.55 No.2
In this study, the Korean veterinary medical devices management system was evaluated relative to systems in the USA, EU, and Japan. Veterinary medical devices are regulated in Korea based on the Medical Appliance Act of 1997. This was initially supervised by the Ministry of Agriculture, Food and Rural Affairs and Korea Animal Health Products Association, and subsequently by the Animal and Plant Quarantine Agency (QIA) in 2000. These devices were classified approximately 1,400 categories as instruments, supplies, artificial insemination apparatus, and other categories. Each of these devices was assigned to four regulatory grades by the QIA in 2007. The ranking system for veterinary medical devices was implemented in 2014 with 820 products from 162 companies registered by that year. However, in vitro diagnostic devices (IVDDs) for animals were managed as medical devices and biological medicine. In vitro diagnostic reagents for treating infection diseases are not subjected to either a classification or grading system. Veterinary medical devices are currently exempt from good manufacturing practices (GMP) and device tracking requirements. Due to gradual growth of the domestic veterinary medical devices market since 2008, regulation of these devices should be improved with re-examination of IVDDs and GMP certification for the effective operating system.
Making sense of Mathematics Education for Young Children From Preservice Teachers' Perspectives
안효진 한국유아교육학회 2008 INTERNATIONAL JOURNAL OF EARLY CHILDHOOD EDUCATION Vol.14 No.2
Using action research methodology, I explored how preservice teachers' emotions about mathematics changed by using a symbolic drawing technique and how their views on mathematics education for young children had changed due to a Constructivism based mathematics method course at university. Twenty-nine Sophomore preservice teachers participated in this study. The summary of this study was as follows. First, The primary images and emotions on preservice teachers' mathematics shifted from negative to positive as a result of the course. Second, because of Constructivism principles classes preservice teachers constructed the idea of mathematical education for young children as follows: (1) Recognizing mathematical concepts in daily life, (2) Connecting mathematical content knowledge and pedagogical knowledge, (3) Experiencing the importance of intrinsic motivation, and (4) Supporting emotional challenge among group members.
The Meaning of Discipline:Through Student Teachers’ Perspectives
안효진 한국유아교육학회 2006 INTERNATIONAL JOURNAL OF EARLY CHILDHOOD EDUCATION Vol.12 No.2
The aim of this study is to explore how preservice teachers build up the meaning of discipline through the qualitative research method. Twenty-two senior students who had finished their practicum participated in this study. The data collection was done through the collections of their cases, journals and discussions, and analyzed by the method of content analysis. The findings, based on my analysis, are as follows. First, the factors preservice teachers use, when they determine whether a certain behavior requires discipline or not, were the developmental stage of a child, the number of repetition of a misbehavior and family environment of a child. Second, preservice teachers used a set of strategies when they tried to resolve the conflict situations raised by a child’s misbehavior. Those strategies were arbitration, persuasion, and avoiding strategies if they were involved in it, and were information providing and comment strategies if they were just observers. Third, they believed the discipline is ‘the process helping children to tell right from the wrong,’ ‘the process integrating individuality into totality,’ and ‘the process connecting schools to families.’
Aspergillus niger 균주를 이용(利用)한 코발트 정광(精鑛)으로부터 코발트 및 구리의 미생물(微生物) 침출(浸出) 연구(硏究)
안효진,안재우,방덕기,김명운,Ahn, Hyo-Jin,Ahn, Jae-Woo,Bang, Duk-Ki,Kim, Meong-Woon 한국자원리싸이클링학회 2013 資源 리싸이클링 Vol.22 No.2
코발트 정광으로부터 코발트와 구리의 회수를 위하여 3종의 Aspergillus niger 균을 이용하여 각 금속의 침출거동을 조사하였다. 주요 실험 변수로는 균주 종류에 따른 유기산 생성량, pH 및 고액농도비 등 이었다. 실험결과 유기산(구연산 및 옥살산) 생성양의 경우 A. niger KCTC 6144가 Malt Extract Broth 배지에서 초기 pH 3.5에서 가장 좋았다. 한편 코발트 및 구리 침출실험결과로는 A. niger KCTC 6985를 사용한 경우가 효과적이었는데, 고액농도 10 g/L인 경우, pH 3.5, $24^{\circ}C$에서 약 15일 경과 후 코발트의 경우는 82%, 구리는 98%의 침출율을 나타내었다. Bioleaching behavior of metal ions for recovery of cobalt and copper from cobalt concentrate was investigated by employing three Aspergillus niger strains. Various factors, such as organic acid generation with fungi type, pH of the culture and pulp density were studied. The results showed that the best fungi for organic acid(citric acid and oxalic acid) generation was A. niger KCTC 6144 using Malt Extract Broth culture at initial pH 3.5. But A. niger KCTC 6985 was more effective for the leaching of cobalt and copper from cobalt concentrate. Our results showed that 82% cobalt and 98% copper was dissolved by A. niger KCTC 6985 at 10g/L pulp density, at pH 3.5 and $24^{\circ}C$ after 15 days incubation.