벼 논에서 토양 유기물 함량, 논 유형 및 농업기후대가 CH4 배출에 미치는 영향

고지연,이재생,우관식,송석보,강종래,서명철,곽도연,오병근,남민희 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.5

To evaluate the effects of abiotic factors of paddy fields on greenhouse gases (GHGs) emissions from rice paddy fields, CH_4 emission amounts were investigated from rice paddy fields by different soil organic matter contents, paddy types, and agricultural climatic zone in Yeongnam area during 3 years. CH_4 emission amounts according to soil organic matter contents in paddy field were conducted at having different contents of 5 soil organic matters fields (23.6, 28.7, 31.0, 34.5, and 38.0 g kg^-1), The highest CH_4 emission amount was recorded in the highest soil organic matters plot of 38.0 g kg^-1. High correlation coefficient (r=0.963^*^*) was obtained between CH_4 emissions from paddy fields and their soil organic matter contents. According to paddy field types, CH_4 emission amounts were investigated at 4 different paddy fields as wet paddy, sandy paddy,immature paddy, and mature paddy. The highest CH_4 emissions was recorded in wet paddy (100%) and followed as immature paddy 64.0%, mature paddy 46.8%, and sandy paddy 23.8%, respectively. For the effects of temperature on CH_4 emissions from paddy fields, 4 agricultural climatic zones were investigated,which were Yeongnam inland zone (YIZ), eastern coast of central zone (ECZ), plain area of Yeongnam inland mountainous zone (PMZ), and mountainous area of Yeongnam inland mountainous zone (MMZ). The order of CH4 emission amounts from paddy fields by agricultural climatic zone were YIZ (100%) > ECZ (94.6%) >PMZ (91.6%) > MMZ (78.9%). The regression equation between CH_4 emission amounts from paddy fields and average air temperature of Jul. to Sep. of agricultural climatic zone was y = 389.7x–4,287 (x means average temperature of Jul. to Sep. of agricultural climatic zone, R^2=0.906^*)

소수계 유역 인공습지에서 식생 밀도 차이에 따른 영양염류 제거효율

고지연,강항원,이재생,김춘송,Sakadevan,K.,Bavor, H. J. 한국환경농학회 2003 한국환경농학회지 Vol.22 No.4

호주 시드니 인근 도·농 복합 소도시로부터 발생하는 비점오염원을 처리하기 위하여 설치된 Plumpton park와 Woodcroft park 인공습지의 처리효율을 살펴본 결과, 수생식물의 밀도가 증가하고 식생이 안정된 Plumpton park 인공습지에서 T-P의 26.2%, T-N의 38.3%, 식생분포가 안정적이지 않은 Woodcroft park에서 14.0%와 20.2%가 각각 제거됨으로서 식물체 근권 미생물에 의한 T-P 및 T-N의 제거 효율이 상당히 큼을 알 수 있었다. 또한 T-N와 T-P에 비하여 NH₄-N, NO₃-N, PO₄^(-3)의 제거율이 높았던 것은 무기태 형태의 영양염류가 식물 및 미생물에 더 쉽게 이용되었기 때문으로 생각된다. 이상의 결과로 볼 때 인공습지에서 식물체와 근권 주위 미생물에 의한 염류제거는 인공습지가 설치한지 오래되었을 때도 효과적이었고, 또한 인공습지는 무기태 영양염류의 제거효율이 더욱 높았으므로 무기화학비료 등의 용탈이 일어나기 쉬운 농경지 비점오염원으로부터 발생하는 수질오염의 개선에 이용할 수 있는 경제적이고도 효율적인 system으로 고려되었다. This study was conducted to evaluate effects of 2 constructed wetlands with different vegetation states (Plumpton park wetland and Woodcroft park wetland) for reducing non-point source pollution from small watershed consisted of residential and agricultural area in suburban district of Sydney, Australia. The total nitrogen and phosphate removal efficiency of Plumpton park constructed wetland, composed of stable and dense vegetation, were 38.3% and 26.2% and Woodcroft park constructed wetland having still poor vegetation due to the short time to settle down transplanted plants after construction, showed relatively low removal efficiency of 20.2% and 14.0%. The removal efficiency of inorganic nutrients such as NH₄-N, NO₃-N, PO₄^(-3) were higher than total nitrogen and phosphate because plants and microorganisms in rhizosphere of constructed wetlands took up inorganic nutrients shortly. According to the type of wetland inflow, the nutrients removal efficiency of storm water flow was lower than base flow.

토론을 활용한 진로프로그램이 고등학교 동아리 학생의 진로성숙도에 미치는 영향

고지연 인천대학교 사회과학연구원 2016 사회과학연구 Vol.9 No.-

The purpose of this study is utilizing this career program is to investigate the effect of discussions on the career maturity of high school student clubs. In addition, we analyzed how to improve, perform and plan the carreer program taking advantage of the discussion through interviews. 21st century knowledge-based society has more to watch the game as well as select the amount of knowledge and knowledge for their own purposes by creating a new paradigm that requires configuration. Therefore, based on the career program it is decided to put the debate in the process. Eventually, course of the student is a matter of choice and always have to worry. For the subjects it was selected 12 students who did not decided their courses from the ‘S’ high school freshman in the Gyeonggi S-city, And quantitative research and interviews were designed using the test and study combined qualitative analysis of observation. The plan established from March 2015, and up to six hours per week were planning to target the experimental group from August 2015 to November 2015 conducted a program of 10 sessions within the school. All sessions were conducted with 100 minutes per session, from 6:00 pm until 8:30 during 50 minutes. Career progression to a program utilizing discussion which were the result of a study conducted in the way and procedures for the experimental group are as follows: The hypothesis of that Career Programs utilizing the debate affects the career maturity of high school students' research was that there is a significant difference because the probability is significant at the 95% confidence level, p=0.002<0.05. As a result of corresponding sample T tests, the sum total of pre-career maturity scores 3.441 points, total score was improved as 3.752 points, which was statistically significant (t = - 4.12, p <0.05). Therefore, a career program utilizes the discussion to a positive impact on career maturity, and discussion showed that the map is a useful way as a career guidance.

보릿짚의 수분함량 및 수확시기가 소각시 대기오염물질 발생에 미치는 영향

고지연,강항원,이재생,김춘송,박성태,김복진 한국환경농학회 2004 한국환경농학회지 Vol.23 No.2

영남지방 벼-보리 이모작답에서 가장 널리 시행되고 있는 보릿짚 처리방법인 소각이 대기환경에 미치는 영향을 소각시 발생하는 온난화가스, 대기오염가스 및 분진발생량을 중심으로 살펴보았다. 보릿짚 소각시 온난화가스 발생량은 CO₂376.8, CH₄ 1.56, N₂O 0.05 kg/10a 로서 CO₂의 발생량이 가장 많았으며, 대기 오염가스 중에는 유기물의 불완전 연소시 배출되는 CO발생량이 28.8 kg/10a로서 가장 많았다. 그 외 SO₂ H₂S, NH₃, NO등의 질소 및 황 함유 유해가스도 소량 발생되었고 발생된 PM 10 분진의 대부분은 인체에 미치는 영향이 PM 10보다 큰 PM 2.5로 이루어져 있었다. 또한 수확시기가 빠르거나 수분함량이 높은 보릿짚일수록 온난화가스 및 대기오염 가스의 발생량이 증가하고 소각 연기내 PM 10 분진중 PM 2.5의 미세분진 비중이 높았다. 수확적기로 알려진 출수 40일 이후의 보릿짚은 출수 후 40일된 보릿짚 소각시 발생하는 대기오염가스 발생량과 큰 차이가 없었다. This study was carried out to determine impacts of burning of barley straw produced from rice-barley double cropping paddy field on air quality by investigating emissions of greenhouse gases (CO₂, CH₄ and N₂O), air pollution gases (CO, SO₂, H₂S, NH₃ and NO) and particulate matters (PM 10 and PM 2.5). When the barley straw at a rate of 4.5 t/ha was burned at open status, the emitted GHGs amounts were CO₂ 376.8 kg/10a, CH₄ 1.56 and N₂O 0.06. The amount of CO emission was the largest among air pollution gases. These results showed that the range of 45~55% of total C in barley straw was emitted as CO₂-C, followed by CO-C (6.4~5.9%) and CH₄-C (0.5~0.7%). As far as moisture content in barley straw is concerned, the higher moisture content that the barley straw contains, the larger amount of air pollution gases and the higher portion of PM 2.5 in PM 10 were emitted when it burned. In case of harvesting time of barley straw, emission amounts of greenhouse, air pollution gases and PM 2.5 portion in PM 10 had tendency to increase when earlier harvested barley straw was burned.

조, 기장, 수수 수침시간에 따른 침지액의 이화학적 특성 및 항산화성분 변화

고지연,송석보,최명은,우관식,하태정,박장환,곽도연 한국작물학회 2017 한국작물학회 학술발표대회 논문집 Vol.2017 No.-

커피의 볶음도에 따른 에스프레소의 비휘발성 성분 함량 변화와 관능적 특성에 관한 연구

고지연 한국커피협회 2022 한국커피문화연구 Vol.8 No.1

This study was carried out to investigate the changes of non-volatile compounds and sensory characteristics in espresso according to the degree of roasting. Increasing the degree of roasting of coffee beans, total amounts of organic acids, caffeine, trigonelline were increased, while free sugars, amino acids, chlorogenic acids of roasted beans were decreased. The amino acids contents decreased as the degree of roasting was increased. Caffeine, trigonelline, cholorogenic acids contents of espresso changed according to the degree of roasting. Caffeine contents increased during roasting process. Trigonelline contents increased during roasting process. Chlorogenic acid contents decreased during roasting process. The sensory evaluation results show that qualities on sweetness and sour of espresso were highest in light-medium roasting treatment, quality on balance was highest evaluation level in medium roasting treatment and overall palatability of espresso with bitter taste in moderately dark roasting treatment decreased greatly.

재배지역간 평균기온 차이가 수수의 혈당강하효과에 미치는 영향

고지연,이재생,우관식,김정인,김현영,송석보,김기영,정태욱,곽도연 한국식품영양학회 2012 한국식품영양학회 학술대회논문집(학술심포지움) Vol.2012 No.12

유아 연극놀이에서 나타나는 즉흥성의 의미 탐색 : Bakhtin의 대화주의를 중심으로

고지연,김선,김낙흥 인하대학교 교육연구소 2020 교육문화연구 Vol.26 No.5

The purpose of this study was to explore the meaning of improvisation presented in a children’s creative drama focusing on Bakhtin’s Dialogism. The research was conducted at S center, an institute with expertise in creative drama, located in Seoul. The participants in this research were 9 children and 2 instructors. The children were 4 to 5 years old at the time of this research. In total, 10 sessions of participatory observations, as well as interviews with children and instructors, were conducted between September and November in 2019. After the observations, the collected data was analyzed using the inductive method from the qualitative approach. The findings are as follows: First, a continuous otherizing kept occurring through improvisation in the creative drama for children. Furthermore, by observing the dramatic experience from the other’s perspective, the children could transform themselves into another existence by encountering dramatic events and signifying their experiences. Second, in the creative drama for children, the improvisation emitted personal thought, feeling, willingness, and imagination, and at the same time, it was occasionally influenced by others. Owing to such features, the improvisation had the dynamic power of transformation and creation: as the instructor’s plan transformed, the flow of the drama kept generating unique significance for the group due to the openness of the improvisation. The significance of this research lies in the fact that it presents a new perspective towards the value of improvisation, which has been ignored in the rationalist pedagogy, by revealing the features and significance of improvisation in creative drama for children through the Bakhtin’s Dialogism perspective. 본 연구는 유아 연극놀이에서 나타나는 유아의 ‘즉흥성’을 Bakhtin의 대화주의 관점으로 분석해봄으로써 즉흥성으로인한 미적 체험의 교육적 함의를 논의하고자 하였다. 본 연구는 서울에 위치한 S연극놀이 전문기관에서 이루어졌으며, 연구 참여자는 만 4, 5세 유아 9명과 그들의 연극놀이 교사 2명이었다. 본 연구를 수행하기 위해 2019년 9월부터 11월까지총 10회기의 참여관찰 및 유아, 교사 면담을 통하여 자료수집이 이루어졌다. 수집된 자료는 질적 접근의 귀납적 방법을통해 3차 코딩의 과정을 거쳐 범주화 작업을 실시하였다. 본 연구에서 드러난 연구결과는 다음과 같다. 먼저 유아연극놀이에서는 즉흥을 통해 계속적인 타자화가 일어나고 있었다. 유아는 가상의 역할을 맡아봄으로써 타자에 침투하여타자의 입장에서 생각하고 판단할 수 있었고, 연극적 체험을 타자의 위치에서 바라봄으로써 체험을 의미화할 수 있었다. 또한, 유아 연극놀이에서의 즉흥성은 개인의 생각과 감정, 의지, 상상 등이 동반되어 발산되는 동시에 타인에 의해영향을 받기도 하였다. 이러한 특성으로 즉흥성은 변형과 생성의 역동적인 힘을 지님으로써, 교사가 계획한 구조가변형되어 연극은 계속적으로 되어가는 과정에 있었고, 즉흥의 개방성으로 인해 그 집단만의 의미를 생성하고 있었다. 본 연구는 Bakhtin의 대화주의 관점을 통해 유아 연극놀이에서 나타나는 즉흥의 특성과 의미를 드러냄으로써 이성중심주의교육이 간과했던 즉흥성의 가치에 대한 새로운 관점을 제시하였다는 데 그 의의가 있다.

경도의 방광요관역류가 있는 소아에서 99mTc-dimercaptosuccinic acid 신 스캔의 필요성

고지연,구자욱 대한소아청소년과학회 2006 Clinical and Experimental Pediatrics (CEP) Vol.49 No.6

Objective : 99mTc-dimercaptosuccinic acid(DMSA) scan is considered to be the most sensitive examination for detection of renal scars. However, because of its high radiation exposure to the kidney and its limited usefulness for patients with low grade vesicoureteral reflux(VUR), some authors have suggested that DMSA scans should be reserved primarily for children with VUR grade 3 and above. The aim of this study was to reevaluate the necessity of DMSA scans as a screening test in infants without reflux or with low grade reflux. Methods : In this retrospective study, 189 infants(mean age : 6.2 months) diagnosed as UTI were enrolled. Voiding cystourethrogram(VCUG), DMSA scan and renal ultrasonography were performed within 1 month of UTI. VUR grade was classified into three subgroups; low grade(grade 1-2), moderate grade(grade 3), and high grade(grade 4-5), respectively. Results : Renal defects were present in 67 of 189 infants, and 82 of the 378 renal units. The incidence of renal defects was significantly correlated with VUR grade(P<0.01); 28 percent without reflux, 38 percent with low grade, 53 percent with moderate grade, 100 percent with high grade, respectively. However, there was no significant differences in incidence of renal defects between the low grade and moderate grade group. Conclusion : In this study, renal defects were found in quite high percentages; 28 percent patients without reflux and 38 percent patients with low grade VUR, respectively. Moreover, there was no significant difference in the incidence of renal defects between the low grade and moderate grade groups. Therefore, DMSA scan should be performed for infants with UTI as a screening test regardless of the presence of VUR. 목 적 : DMSA 신 스캔은 신장에 대한 높은 방사능의 위험성과 낮은 grade의 역류시 불필요한 것으로 인식되어 최근 연구들에서는 낮은 방광요관역류가 있을 시에는 조기검사에 포함시키지 않는 것으로 보고되고 있다. 그러나 실제 임상에서는 낮은 grade의 역류 환아에서도 신피질결손이 보이는 경우가 있어 DMSA 신 스캔의 조기검사로서의 필요성에 대해 재조명하여 보고자 하였다. 방 법 : 1995년부터 2004년까지 상계백병원 소아과에서 요로감염으로 진단된 환아들 중 신장초음파, DMSA 신 스캔, 배뇨성 방광 요도 조영술을 모두 시행한 189명의 환아를 대상으로 하였다. 검사들은 요로감염으로 진단된 지 적어도 1개월 이내에 시행하였다. 방광요관역류의 정도는 grade I-II는 경도(low grade), grade III은 중등도(moderate grade), grade IV-V는 중증(high grade)으로 각각 분류하였다.결 과 : DMSA 신 스캔상 신피질결손은 총 189명 중 67명, 378 신단위 중 82 신단위에서 보였다. 신피질결손의 빈도는 역류가 없을 때 28%, 경도일 때 38%, 중등도일 때 53%, 중증일 때 100%로 역류가 심할수록 신피질결손의 빈도도 높아지는 것으로 나타났다(P<0.01). 중등도일 때의 신피질결손의 빈도는 경도일 때의 신피질결손의 빈도와 의미있는 차이는 없었다(P> 0.05).

밀양지역 시설재배지 지하수의 수질성분 분포

고지연,정기열,이재생,강항원,박향미,강위금 한국토양비료학회 2000 한국토양비료학회 학술발표회 초록집 Vol.2000 No.5