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호도의 유통체계에 관한 연구 - 천원군의 사례조사를 중심으로 -
전상돈(Sang Don Jeon),조응혁(Eung Hyouk Cho) 한국산림과학회 1990 한국산림과학회지 Vol.79 No.2
The following conclusions have been obtained with special reference to the walnut marketing system in Cheonwongun districts 1. The marketing channel of walnut in the producing areas was mainly depended on the individual selling by 89.58%. and sale through farmer`s coops and forest owner`s association by 10.42%, and share of walnut through fatmer`s coops was 84.58%. 2. The market structure in assembling stage of walnut can be represented as oligopoly considering the market share of 86.26% derived by CR3 method. 3. Direct selling from producers to consumers would be recommendable to reduce marketing margin considering the 77.20% of sale`s dependency on assembler-commisioner. 4. Two major reasons to follow the marketing channel of assembler-commissioner were the conveniency (45.00%) and dealing with small quantity of walnut (20.00%). Let the walnut producers follow the institutional marketing channels such as farmer`s coops and forest owner s association, special actions including better conveniency, smaller quantity and the procedures should be improved. S. Farmer`s share of walnut was estimated as 54.93% and total marketing margin was 45.0% of which 36.70% destined to the retail stage. 6. The price index in November was the lowest(83.63) due to the flood and hunger sale and the index in April was the highest(115.74). To cope with the severe price fluctuation and to stabilize seasonal walnut price, sale`s in advance, credit supply and provision of storage facilities must be considered in policy-making decision for forest farmers.
구제역 매몰지 현황 및 입지특성 분석을 통한 매몰지 관측정 설치 기준 연구
전상미(Sang Mi Jeon)(全相美),박재현(Jae Hyun Park)(朴宰賢),박창근(Chang Geun Park)(朴昌根) 위기관리 이론과 실천 2013 Crisisonomy Vol.9 No.11
2010년 11월부터 2011년 3월까지 발생한 구제역으로 전국에 약 350만 마리의 가축이 살처분되었으며, 살처분 매몰지는 4600여 곳에 이른다. 본 연구에서는 대규모로 발생된 가축 살처분 매몰상황에서 발생된 문제점들을 보완하기 위한 기초 작업으로 전국 구제역 매몰지의 입지특성, 취약성, 관측정 설치 여부 등 매몰지 현황을 유형별로 분석하여 GIS DB를 구축하고, 그 중 143개소 표본조사 지역을 선정하여 현장조사를 수행하였다. 또한 침출수 유출로 인한 지하수와 하천오염 등 2차 환경오염 방지를 위한 관측정 설치 기준을 제안하고 표본조사 지역에 적용, 평가하였다. 연구 결과 전체 매몰지(4216개소 기준) 중 산지형 11%, 하천형 17%, 평지형 72%으로 분석되었으며, 관측정이 설치된 지점은 약 32.7%인 것으로 조사되었다. 표본지역 143개소를 대상으로 관측정 설치 기준(안)을 적용하여 관측정 설치여부의 적정성을 평가한 결과 관측정 1개소 이상 지점 총 66개소(46%) 중 39개소(27%)이상이 지하수 흐름과 무관하거나, 흐름면적대비 관측정 개소수가 부족한 것으로 평가되었으며, 27개소(19%) 만이 지하수 관측망 위치 및 개소수가 적정한 것으로 분석되었다. Between January 2010 and March 2011, Foot-and-mouth disease was occurred in the whole country; about 3.5 million livestock were destroyed which the burial site reaches more than 4,600 places. In this study the present state of burial site(locaional characteristics of burial site, vulnerability, existence of mositoring well etc.) by types was analyzed and establish the GIS Database was established so as to solve the livestock burial site problem accurs on a large scale. 143 burial sites were selected as a sample surbey and performed a field inestigation. As well as to prevent secondary environmental pollution(groundwater pollution and river pollution etc.) by leachate, the monitoring well installation guideline was proposed and apply to sample survey sites. The results show that 11% of the whloe burial sites(based on 4216 sited locations) are installed on the mountain, 17% are beside the river and 72% are on the plain site. Only 32.7% of the survey sites have a monitering well. As the results of applying such the monitoring well installation guideline to the sample surbey 143 sites, more than 39 sites were installed without relating with groundwater flow or lacked of monitering well number and only 27 sites are appropriate for the monitoring well installation guideline(monitering well location, numbers etc.).
VOC와 NOx의 동시제거를 위한 플라즈마/촉매의 복합시스템 개발
전상구(Sang Goo Jeon),신대현(Dae-Hyun Shin),김광호(Kwang-Ho Kim),노남선(Nam-Sun Nho) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Plasma/catalyst hybrid reactor was designed to overcome the limits of plasma and catalyst technologies. Plasma/catalyst hybrid system in which a plasma and a catalyst reactor are connected in series was used to decompose VOCs(toluene) and NOx simultaneously at the temperature lower than 150℃. The catalyst prepared in this experiment was Pd/ZrO₂, Pt/ZrO₂ and Pt/Al₂O₃ which are catalysts of honeycomb type. Plasma/catalyst reactor showed better removal efficiency by utilization of full energy generated from plasma to catalyst than the only plasma reactor. When plasma/catalyst hybrid reactor with Pt/ZrO₂ and Pt/Al₂O₃ decomposed the VOCs(toluene) & NOx simultaneously, it removed nearly 100% of toluene and also the selectivity of CO₂ was remarkably elevated as compared with the only plasma reactor. In case of simultaneously decomposing VOCs(toluene) and NOx, about 80% of NOx was removed.
Bitmap Index를 이용한 RDBMS 성능향상 기법에 관한 연구
전상화 ( Sang Hwa Jeon ),이언배 ( Eun-bae Lee ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.1
데이터베이스 성능이 저하되면, 가장 먼저 SQL 튜닝을 고려한다. SQL 튜닝에서 가장 주의 깊게 사용해야하는 부분이 바로 Index의 설정과 관련된 부분이다. 본 논문에서는 OLAP 환경에서 다양하고 복잡한 질의처리 요구와 관련하여, B-Tree Index의 문제점을 개선하고 질의 성능을 향상시키기 위해서 Bitmap Index를 사용하였다. 또한, Bitmap Index 사용의 최적 임계점을 추적하기 위하여, 데이터 분포도와 조건절의 복잡도를 조사하였으며, 샘플링된 질의문을 기준으로 B-Tree Index를 사용하였을 때와 Bitmap Index를 사용하였을 때의 비교 실험을 통하여 Bitmap Index의 사용으로 RDBMS의 성능향상이 있음을 증명하였다.
예비요양보호사의 직업의식 영향 요인 및 인식에 관한 연구
전상남(Sangnam Jeon),신학진(Hakgene Shin) 한국보건복지학회 2009 보건과 복지 Vol.11 No.-
Objectives. This study aimed at exploring factors and perception influencing job value of caregiver trainees who are classified as health group, welfare group and newcomer in terms of their previous educations. Methods. For the empirical study, we exploited the convenient sampling and collected 138 questionnaires from caregiver trainees in Jeonju city. The data was analyzed by the cross-tabulation with χ2 to examine the differences among groups and the multiple regressions to find factors and perception influencing to job value. Results. First, we found differences in the reasons of attending the class among health, welfare, and newcomer groups. Second, for the reason to attaining caregiver job, newcomers thought economic reason and the health and the welfare groups responded self actualization. Third, the three groups want to branch out different occupational areas. Fouchh, it was appeared that the health and the newcomer considered 'fand y-like atmosphere' and the welfare group emphasized 'giving oppochuappees to perform one's capability' as the major factor for choosing a job. Last y idenpefied were the factors influencing perception of caregiver as a professional occupation. For the health group and the newcomer group, the belief of 'people should wnd ' respective y explained 7.5% and 3vi9% of the perception of caregiver as a professional occupation. For the welfare group, the belief of 'wnd ths social nomigation' explained 6s 6% of the perception of caregiver as a professional occupation(R2=63.6%). Conclusions. In general and common, three groups made certain level of differences in terms of the reasons for education, social obligation, dedication for work and professionalism. Therefore we suggest the education program for three caregiver trainee groups should be different in terms of curriculum and contents.