`JART 국제 하계 연수회` 참관기

김춘식 대한방사선과학회(구 대한방사선기술학회) 1990 방사선기술과학 Vol.13 No.2

언론의 선거보도 연구 쟁점과 과제

김춘식 한국외국어대학교 국제커뮤니케이션연구소 2004 東西言路 Vol.17 No.-

아산시의 주요 지역문화 자원과 활용전략 평가

김춘식 한국지방자치학회 2009 한국지방자치학회 세미나 Vol.2009 No.8

학술연구논문 구두발표 2 : 봉대산 산불피해 복원지의 토양특성

김춘식,정재엽,주남규,서희영,박재현,마호섭 한국임학회 2013 산림과학 공동학술대회 논문집 Vol.2013 No.-

Post-fire Effects on Soil Properties in Red Pine (Pinus densiflora) Stands

김춘식,구교상,변재경,정진현 한국산림과학회 2005 Forest Science And Technology Vol.1 No.1

This study aimed to investigate change on soil properties due to the fire for one week and one year in Pinus densiflora Sieb. et Zucc, one of the most important timber species in Korea. After one year, bulk density of the high intensity fire area increased in surface soil (0~5 cm) compared with the unburned area. Bulk density to 25 cm was greater in the high than in the low intensity fire areas. Soil pH, total nitrogen, available phosphorus, potassium, calcium, and magnesium increased immediately after fire in surface soil of the burned area compared with the unburned area, but there was no marked change in subsurface soil (5~25 cm). Organic matter, total nitrogen, available phosphorus, and exchangeable cations in the surface soil were generally less in the high than in the low intensity fire areas, suggesting oxidation and volatilization loss. Soil pH and nutrients in surface soil of the burned area decreased rapidly after one year from forest fire. The results suggest that the decrease of nutrients after one year from forest fire may be associated with uptake by vegetation, and accelerated erosion and leaching losses by the exposure of mineral soils.

Cellulose Decomposition Rates in Clear-cut and Uncut Red Pine (Pinus densiflora S. et Z.) Stands

김춘식,변재경,안현철 한국산림과학회 2010 Forest Science And Technology Vol.6 No.1

This study was carried out to determine the effects of clear-cutting on cellulose decomposition in a 42-year-old pine (Pinus densiflora S. et. Z.) stand. The variation of cellulose mass loss with soil temperature, soil pH, soil CO₂ efflux rates, soil moisture and soil organic carbon content was measured monthly for 1 year from clear-cut and uncut pine plots. Annual mean cellulose mass loss rates during the study period were generally higher (P = 0.07) in the clear-cut (3.73 mg g−¹ day−¹) than in the uncut (2.74 mg g−¹ day−¹) plots. Increased cellulose mass loss rates in the clear-cut could be attributed to the change of soil environmental factor such as soil temperature following canopy removal. Cellulose mass loss rates in the clearcut and the uncut plots were positively correlated with soil temperature (clear-cut: r = 0.677, P < 0.01; uncut: r = 0.702, P < 0.01) at a soil depth of 20 cm, while there was no significant correlation (P > 0.05) between cellulose mass loss and soil water or soil organic carbon content. The results indicate that soil temperature is a key variable on increased cellulose mass loss rates following canopy removal in a red pine stand.

창의융합 발표토론 프로그램(CCEP)의 효과성에 관한 연구

김춘식,윤경순 역사와교육학회 2022 역사와 교육 Vol.35 No.-

The Ministry of Education defines the talents required by the future society as 'creative convergence talent', suggests self-management, knowledge information processing, creative thinking, communication, and community skills as core competencies that creative convergence talents should have. This study conducted the Creative Convergence Education Program based on Presentation and Discussion (hereinafter CCEP) targeting high school students in some regions, and confirmes the effect of ths program on the core competencies that creative convergence talents should have. This study is a similar experimental study of the design before and after the inequality control group, and the subjects were students in the second grade of general high school located in the J province. The CCEP consisted of an opening ceremony, 4 online camp special lectures by scholars, mentoring, presentation and discussion classes, and performance presentations, and was operated for 12 weeks. The experimental group consisted of 36 people who participated in the 12-week CCEP after school, and the control group consisted of 40 people, who maintained their daily life after school. The data collected in this study used the SPSS/PC 26.0 program. Differences between groups before and after application of the program were analyzed with an independent sample t-test, and differences within groups before and after application of the program were analyzed with a paired sample t-test. After applying the CCEP, Self-management competency (t=2.01, p=.048), knowledge information processing capability (t=3.05, p=. 003) and communication competency (t=2.99, p=.004) was statistically significant between the two groups, but there was no significant difference in community competency (t=1.81, p=.074). In conclusion, it was confirmed that the developed CCEP was effective in improving the core competencies that creative convergence talents should have. The core competencies required by the future society should be nurtured through the entire school education process, including subject education. Therefore, based on the results of this study, it is expected that the CCEP operated as a non-curricular program will be used as an important curriculum program in the actual elementary and secondary education in order to enhance the core competencies necessary for nurturing creative convergence talents. 교육부는 미래사회가 요구하는 인재를 ‘창의 융합형 인재’로 정의하고, 창 의융합형 인재가 갖추어야 할 핵심역량으로 자기관리역량, 지식정보처리역 량, 창의적 사고역량, 의사소통역량, 공동체역량 등을 제시하고 있다. 본 연구 는 일부 지역 고등학생을 대상으로 창의융합 발표토론 프로그램(Creative Convergence Education Program based on Presentation and Discussion, CCEP)을 시 행하여, 이 프로그램이 창의융합형 인재가 갖추어야 할 핵심역량에 미치는 효과를 확인하였다. 이를 위해 본 연구는 비동등성 대조군 전후 설계의 유사실험 연구로 J도에 위치한 일반계열 고등학교 2학년 학생을 대상으로 하였다. 창의융합 발표토 론 프로그램은 개강식, 온라인캠프 특강 4회, 멘토링, 발표토론 수업, 성과발 표회로 구성하여 12주간 운영하였다. 실험군은 36명으로 방과 후에 프로그램 에 참여하였고, 대조군은 40명으로 방과 후에 일상적인 생활을 유지하였다. 본 연구에서 수집된 자료는 SPSS/PC 26.0 프로그램을 이용하여 프로그램 적용 전-후의 집단 간 차이는 독립표본 t-검정으로 분석하였다. 연구의 결과, 창의융합 발표토론 프로그램 적용 후 자기관리역량(t=2.01, p=.048), 지식정보처리역량(t=3.83, p<.001), 창의적 사고역량(t=3.05, p=.003), 의사소통역량(t=2.99, p=.004)은 두 집단 간에 통계적으로 유의미한 차이가 있었으나, 공동체역량(t=1.81, p=.074)은 유의한 차이를 보이지 않았다. 결론적으로 창의융합 발표토론 프로그램은 창의융합형 인재가 갖추어야 할 핵심역량을 향상시키는데 효과적임을 확인하였다. 나아가 미래사회가 요 구하는 핵심역량은 교과 교육을 포함한 중등교육과정을 통해 중점적으로 길 러지도록 해야 한다. 따라서 본 연구의 결과를 바탕으로 창의융합형 인재 양 성에 필요한 핵심역량의 증진을 위해서, 비교과 프로그램으로 운영된 창의융 합 발표토론 프로그램이 중등교육과정에 중요한 교과프로그램으로 활용될 수 있을 것으로 기대한다.

Carbon and nitrogen inputs by litter fall in fertilized and unfertilized larch plantations

김춘식,정재엽,김진성 한국산림과학회 2011 Forest Science And Technology Vol.7 No.1

This study was carried out to evaluate the effects of fertilization on carbon and nitrogen dynamics by litter fall of a 36-year-old larch (Larix leptolepis) plantation in the Sambong Exhibition Forests, Gyeongsangnam-do, Korea. Litter was collected monthly between April 2003 and May 2006. Seasonal inputs of litter fall components such as needle, broad leaf, branch, bark and total litter inputs followed a similar pattern between fertilized and unfertilized plots. The annual amounts of the litter components were not significantly different (P 4 0.05) between fertilized and unfertilized plots. Mean needle litter fall was similar between the fertilized (2564 kg ha71 yr71) and unfertilized plots (2501 kg ha71 yr71) and total annual litter fall averaged 3552 kg ha71 yr71 in the fertilized and 3541 kg ha71 yr71 in the unfertilized plots during the sampling period. Proportion of needle litter fall was slightly higher in the fertilized (72.2%) than in the unfertilized (70.8%) plots. Carbon concentrations of needle litter were not significantly affected by fertilization (P 4 0.05), while there was a significant fertilization effect on nitrogen concentrations with high nitrogen concentrations of needle litter in the fertilized (7.7 g kg71) compared with the unfertilized (6.8 g kg71) plots. There was no significant difference (P 4 0.05) in the organic carbon inputs by needle litter between the fertilized and unfertilized plots, whereas annual nitrogen inputs were significantly higher in the fertilized (17.7 kg N ha71 yr71) than in the unfertilized (15.6 kg N ha71 yr71) plots. The results indicated that nitrogen dynamics by litter fall could be affected by fertilization, but a minimal impact to carbon dynamics by litter fall in the larch plantation.

검은 거울

김춘식 천년의시작 2021 (계간)시작 Vol.20 No.3

Influence of forest tending (Soopkakkugi) works on litterfall and nutrient inputs in a Pinus densiflora stand

김춘식,손요환,이우균,정재엽,노남진,김소라,양아람,주남규 한국산림과학회 2012 Forest Science And Technology Vol.8 No.2

This study was conducted to examine litterfall and nutrient inputs following forest tending works (FTW) which are one of the most important forest management activities in Korea. We measured litterfall and nutrient (C, N, P, K,Ca, Mg) inputs from needle litter in FTW and non-FTW (control) stands of approximately 40-year-old red pine (Pinus densiflora S. et Z.) forests in the Hwangmaesan Soopkakkugi model forest in Sancheonggun Gyeongsangnamdo,Korea. Seasonal inputs of litterfall components such as needle, broadleaf, branch, bark and total litter inputs followed a similar pattern between the FTW and control stands. Annual average needle and total litterfall were significantly lower in the FTW (2483 kg ha^-1 yr^-1; 4038 kg ha^-1 yr^-1) than in the control stands (3377 kg ha^-1yr^-1; 5589 kg ha^-1 yr^-1) during the study period. Nitrogen concentration of needle litter was significantly affected by FTW (P < 0.05), while other nutrient (C, P, K, Ca, Mg) concentrations were not significantly different between the FTW and control stands. There was a significant difference (P < 0.05) in the organic C, N, P and Ca inputs by needle litter following FTW, whereas K and Mg inputs were not significantly different between the FTW and control stands. The results indicate that the reduction of litterfall and nutrient inputs following FTW can be attributed to reduced needle litterfall and vary considerably nutrient cycle in FTW stands.