염화제2철용액에 의한 휘안광의 침출 Kinetics : 휘안광의 습식처리에 관하여 (제2보) On the leaching behavior of Stibnite (2nd Report)

김동진,오재현,고인용 대한금속재료학회(대한금속학회) 1981 대한금속·재료학회지 Vol.19 No.5

A study on the leaching of stibnite was carried out in acidified ferric chloride solution at temperature ranging from 30℃ to 90℃. Possible leaching mechanism for the reaction was discussed with the experimental kinetic data obtained in this investigation. To evaluate the rate equation satisfying the data of the reaction, various kinetic models were discussed. The results obtained in this work are as follows; 1) The leaching rate of stibnite was enhanced by increasing the temperature and the concentration of solvent, and by making the particle size smaller. 2) In case of fine particle finer than 270 mesh, the leaching reaction is controlled by the diffusion of reactant (Fe(III)) through sulfur layer. The leaching reaction of coarse particle coarser than 270 mesh is controlled by chemical reaction in early stage and shift to diffusion controlled reaction according as the reaction progresses. 3) The apparent activation energy for pore diffusion reaction is 17 ㎉/㏖. 4) The initial leaching rate of 270/325 mesh stibnite can be expressed by the following empirical equation, d[Sb(III)]/dt = k ·[Fe(III)]^0.3 ·[HCl]^0.6

Multi Criteria Decision on Selecting Optimal Ship Accident Rate for Port Risk Mitigation

김동진,김상열 한국해운물류학회 2009 The Asian journal of shipping and Logistics Vol.25 No.1

Large ports have potential catastrophic accidents by handling enormous amount of hazardous and dangerous materials which tend to increase the risk of port and the facilities in its vicinity. In the paper, we propose a mathematical method to identify the ship accident types affecting risk in port areas which propagate into death of people as a consequence of the accidents. We consider a multi criteria port risk problem and a goal programming modeling is constructed for calculating accident rates of each accident type. The obtained results can be employed by decision makers or port authorities in implementing the port risk mitigation measures or in designing (planning) future port construction. For the study, we use the accident data for the 12 domestic ports over the last 5 years from 2002 to 2007.

방사선 센서 제작을 위한 TlBr 단결정 특성 분석

김동진,김한수,김영수,정만희,하장호 대한방사선방어학회 2013 대한방사선방어학회 학술발표회 논문요약집 Vol.2013 No.04

A Probabilistic Approach to Forecasting and Evaluating the Risk of Fishing Vessel Accidents in Korea

김동진 해양환경안전학회 2018 海洋環境安全學會誌 Vol.24 No.3

Despite the accident rate for fishing vessels accounts for 70% of all maritime accidents, few studies on such accidents have been done and most of the them mainly focus on causes and mitigation policies to reduce that accident rate. Thus, this risk analysis on sea accidents is the first to be performed for the successful and efficient implementation of accident reducing measures. In risk analysis, risk is calculated based on the combination of frequency and the consequence of an accident, and is usually expressed as a single number. However, there exists uncertainty in the risk calculation process if one uses a limited number of data for analysis. Therefore, in the study we propose a probabilistic simulation method to forecast risk not as a single number, but in a range of possible risk values. For the capability of the proposed method, using the criteria with the ALARP region, we show the possible risk values spanning across the different risk regions, whereas the single risk value calculated from the existing method lies in one of the risk regions. Therefore, a decision maker could employ appropriate risk mitigation options to handle the risks lying in different regions. For this study, we used fishing vessel accident data from 1988 to 2016.

신장 공여자의 보험의학적 위험분석

김동진,Kim, Dong-Jin 한국생명보험의학회 2010 保險醫學會誌 Vol.29 No.2

Background: The kidney transplantation is increasing. The kidney donation of a living donor is more common in Korea than in other countries. Underwriters may encounter a case of a kidney donor. So we need to determine medical risk for a living kidney donor. Methods: Comparative mortality figures were calculated from a source article using mortality analysis methods. Results: Mortality Ratio of a living kidney donor was estimated to 106%, and Excess Death Rate was 0.89 per 1000. Discussion: A healthy kidney donor is quite within standard, even better in terms of medical risk.

Effects of Free Ammonia and Dissolved Oxygen on Nitrification and Nitrite Accumulation in a Biofilm Airlift Reactor

김동진,안대희,이동익 한국화학공학회 2005 Korean Journal of Chemical Engineering Vol.22 No.1

The purpose of this research is to find out the effects of free ammonia concentration and dissolved oxygen on nitrification and nitrite accumulation in a biofilm airlift reactor. Free ammonia seriously inhibited the activity of nitrite oxidizers at the concentration higher than 0.1 mg NH3-N/L and it was very effective for nitrite accumulation. Dissolved oxygen limitation in the biofilm also caused nitrite accumulation. Long term inhibition decreased the growth rate for nitrite oxidizers, and ammonia oxidizers were the dominant nitrifiers in the wastewater nitrification. Selective accumulation of ammonia oxidizers in the biofilm could be another reason for nitrite accumulation. Free ammonia inhibited nitrite oxidizers immediately, and adaptation to free ammonia was not observed. Therefore, the optimum control of free ammonia and dissolved oxygen concentration is critical for nitrite accumulation and the strategy can be used for selective accumulation of ammonia oxidizers in a bioreactor system.

이사풍속과 주거문화

김동진,방경식,장희순 한국주거환경학회 2009 한국주거환경학회 학술대회 발표논문집 Vol.2009 No.11

모바일 어플리케이션 스토어 서비스 사용행태 비교

김동진,김소영,최재현,배범수 한국경영과학회 2013 한국경영과학회 학술대회논문집 Vol.2013 No.5

It is thought that the log analysis method is more reliable than focus group discussion (FGD) or performance measurement under test environment because real usage behaviors can be understood by it. In this study, real usage behaviors on applications store service are identified. Log data that forty eight customers used the service are collected by smart phone application. As a result of the log data analysis, the usage frequencies according to menus or time are identified. In addition, differences between usage behaviors are figured out as the results of the log data analysis on the service are compared to those on Google play. The reason of the differences and the usage intention can be understood by focus group discussion (FGD) from members out of forty eight customers. The results will be utilized for UX advance of the service.

Inflammatory Myofibroblastic Tumor Treated with Laparoscopic Proximal Gastrectomy and Double-Tract Anastomosis

김동진,김욱 대한위암학회 2015 Journal of gastric cancer Vol.15 No.1

Inflammatory myofibroblastic tumors (IMTs) of the stomach are extremely rare in adults, and their oncologic prognosis is not well understood. We present a 28-year-old man with a proximal gastric IMT. The patient visited the emergency department of Yeouido St. Mary’s Hospital with syncope and hematemesis. Hemoglobin levels were <5.5 g/dl. Gastric fibroscopy showed a protruding mass 4×4 cm in size, with central ulceration on the posterior wall of the fundus and diffuse wall thickening throughout the cardia and anterior wall of the upper body. Endoscopic biopsy revealed indeterminate spindle cells, along with inflammation. Given the risk of rebleeding, an operation was performed despite the uncertain diagnosis. Because the mass was circumferential, laparoscopic proximal gastrectomy and double-tract anastomosis were performed to ensure a safe resection margin. The pathological diagnosis was consistent with an IMT originating from the stomach, although the tumor was negative for anaplastic lymphoma kinase gene mutation.

건강도시에서의 건강영향평가 제도

김동진 한국보건사회연구원 2011 보건복지포럼 Vol.173 No.-

국민의 건강을 효과적으로 증진시키기 위해서는 보건 부문 이외에 사회적 건강결정요인과 관련된 모든 정책을 건강을 증진하는 방향으로 결정하는 것이 건강증진의 핵심적인 전략이 되어야 한다. 건강도시에서 건강영향평가가 시행되는 것은 다음과 같은 이유에서 타당하다. 첫째, 건강도시뿐만 아니라 일반적으로 지방정부는 중앙정부에 비해 각종 정책이나 의사결정 등을 통해 국민의 건강과 관련된 건강결정요인에 더 많은 영향을 미친다. 둘째, 건강도시와 건강영향평가 모두`건강한 공공정책`을 지향한다는 점에서 동일하다. 이 글에서는 지난 2009년부터 한국보건사회연구원의 주도로 시작된 건강도시에서의 건강영향평가 시범사업의 의미와 그 결과에 대해 살펴봄으로써 점차 고조되고 있는 건강영향평가에 대한 관심을 다시한번 환기시키고자 한다.