[작품론] 부끄럽지 않은 시와 시론

문종필 계간 서정시학 2023 서정시학 Vol.33 No.1

[특집 그래픽+노블] 사생아私生兒 그래픽 노블

문종필 인천작가회의(작가들) 2022 작가들 Vol.- No.82

방동저수지 유역의 토지이용에 따른 비점오염 부하발생 원단위 산정

문종필,김태철,안병기 충남대학교 농업과학연구소 1999 농업과학연구 Vol.26 No.2

1. 방동저수지 상류 5개 토지이용별 유출수량과 수질조사를 실시하고 비점오염원 원단위를 산정하였다. 산지에서 SS 84㎏/ha년, BOD 4.2㎏/ha/년. COD 15㎏/ha/년, T-P 0.1㎏/ha/년, T-N 1.1㎏/ha/년으로 배출부하원단위가 가장 작았다. 거주지역에서 SS 319㎏/ha/년, BOD 34㎏/ha/년, COD 98㎏/ha/년, T-P 5.6㎏/ha/년, T-N 8.7㎏/ha/년으로 배출부하 원단위가 가장 많았다. 2. 비점오염원은 강우-유출과 관련이 있어 전체 비점오염원의 약 46%가 7~8월에 유출되며, 건기인 10월에서 4월까지는 연간 총량의 약 20%, 5월에서 9월까지는 약 80%가 유출된다. 3. 유기물질은 SS, BOD, COD는 거주지역에서, 영양물질인 T-N은 논·밭지역에서 T-P는 논·밭·거주지역 및 방목지에서 많이 유출되고 있다 . 4. T-N, T-P등 영양물질이 농지에서 많이 유출되어 저수지와 같은 폐쇄수역에 부영양화로 인한 수질악화의 원인이 된다. 비점오염원이 우기에 집중배출되어 공공수역에 큰 오염원으로 작용하므로 도시하천을 이용한 비점오염원 관리방안과 비점오염원 발생원 저감방안을 적극 추진하여야 한다. The water quality of river has been deteriorated mainly by both point source pollution and nonpoint source pollution from the watershed. Techniques to cut point source pollutants down to the level required have been developed. But, techniques of best management practices to catch the nonpoint source pollutions and to control the routine of pollutants were not successively developed. The quality of closed water system such as reservoir, lake and farm pond is irresistable to being polluted mainly by nonpoint source pollutions. In this study, the population, land use, runoff coefficient, amount of rainfall, and runoff discharge in the watershed were surveyed to investigate the characteristics of water quality such as BOD, COD, SS, T-N, and T-P. After studying the changes of water quality in the viewpoint of land use such as paddy land, residential area, upland, forest and meadow, load factors of nonpoint source pollutant were calculated in Bangdong reservoir watershed. Residential area was more severe than other land use as far as BOD, COD and SS concerned T-N and T-P released from the paddy and upland were higher than other land use. The 45.9% of total load of nonpoint source pollution was occured during the rainy season.

전력기기 유지보수를 위한 RCM 기법 적용

문종필 忠州大學校 2010 한국교통대학교 논문집 Vol.45 No.-

With the implementation of electric power industry reform, the utilities are looking for effective ways to improve the economic efficiency. One area in particular, the equipment maintenance, is being scrutinized for reducing costs while keeping a reasonable level of the reliability in the overall system. Here the conventional RCM requires the tradeoff between the upfront maintenance costs and the potential costs of losing loads. In this paper I describe the issues related to applying so-called the “Reliability-centered Maintenance” (RCM) method in managing electric power distribution equipment. The RCM method is especially useful as it explicitly incorporates the cost-tradeoff of interest, i.e. the upfront maintenance costs and the potential interruption costs, in determining which equipment to be maintained and how often. In this paper, the Markov model for maintenance is developed. Second, developed model is introduced and described. This model has two different points compared with existing model: TVFR and nonlinear customer interruption cost (CIC). That is, normal stage at the middle of bathtub curve has not CFR but the gradual increasing failure rate and the unit cost of CIC is increasing as the interruption time is increasing. The results of case studies represent the optimal maintenance interval to maintain the equipment with minimum costs.

온수배관을 이용한 시설딸기 부분난방기술 개발

문종필,강금춘,권진경,백이,이태석,오성식,남명현,Moon, Jongpil,Kang, Geum-Choon,Kwon, Jin-Kyung,Paek, Yee,Lee, Tae Seok,Oh, Sung-Sik,Nam, Myeong-Hyeon 한국농공학회 2016 한국농공학회논문집 Vol.58 No.5

The effects of spot heating for growing the strawberry cultivated in a plastic greenhouse during the winter that were estimated in Nonsan strawberry experiment station located in Chungnam. The temperature of water for heating was controlled by a electric hot water boiler and kept at the range of $22{\sim}24^{\circ}C$. Heating pipes were set up in root zone for root zone heating and very close to crown for crown heating. Spot heating effects were estimated by applying spot heating system in three test factors of heating root zone, crown only and crown plus root zone. The material for crown heating pipe was white low density polyethylene and the nominal diameter of that pipe was 16 mm. The material for root zone heating pipe was flexible stainless steel and the nominal diameter of that pipe was 15A. The flow rate of heating water circulation was 480 L/h and water circulation lasted for all day long. Temperatures, harvest yield by test beds were surveyed from Nov. 10, 2013 to Apr. 29, 2014. The temperature of crown spot for crown heating bed was at the range of $13.0{\sim}17.0^{\circ}C$ during the night and that of crown spot in control bed was at the range of $8.0{\sim}14.0^{\circ}C$. Also, the temperature of root zone for root zone heating bed was at the range of $18{\sim}21.0^{\circ}C$ and that of root zone in control bed was at the range of $13.0{\sim}15.0^{\circ}C$. The cumulative yield growth rate in earlier harvest period (from Dec. 20 to Mar. 15) of crown heating bed was 43% compared with that of control bed and the cumulative yield of crown plus root zone heating bed was 39 % and that of root zone heating bed was 39 %.

「김수영 시 「전화이야기」 연구」에 대한 토론

문종필 한국시학회 2021 한국시학회 학술대회 논문집 Vol.2021 No.12

SWAT2000 모형을 이용한 갑천수계의 소유역별 유출량 추정

문종필,김태철,Moon, Jong-Pil,Kim, Tai-Cheol 한국농공학회 2006 한국농공학회논문집 Vol.48 No.5

Geographic Information System has extended to higher assessment of water resources. GIS linking with hydrological model becomes a trend in water resource assessment modeling. One of the most popular models is SWAT2000 which have effectiveness in multi-purpose processes for predicting the impact of land management practices on water, sediments and chemicals yields in large complex watershed with varying soils, land uses, and management conditions over long period of time. In this study, SWAT2000 model was applied to Gap stream watershed in Daejeon city where TMDL (Total Maximum Daily Load) Regulation would be implanted. The Gap Stream watershed was partitioned into 8 subbasins, however, only 3 out of 8 subbaisns were observed for having practical gauged data on the basis of streamflow from the year of 2002 to 2005. Gauged streamflow data of Indong, Boksu and Hoeduck stations were used for calibration and validation of the SWAT Streamflow simulation. Estimation Efficiency Analysis (COE), Regression Analysis ($R^{2}$), Relative Error (R.E.) were used for comparing observed streamflow data of the 3 subbasins on the daily and monthly basis with estimated streamflow data in order to fix optimized parameters for the best fitted results. COE value for the daily and monthly streamflow was ranged from 0.45 to 0.96. $R^{2}$ values for daily and monthly streamflow ranged from 0.51 to 0.97. R.E. values for total streamflow volume ranged from 3 % to 22.5 %. The accuracy of the model results shows that the SWAT2000 model can be applicable to Korean watersheds like the Gap Stream watershed that needs to be partitioned into a number of subbasins for TMDL regulation.

턱을 넘어 평지로

문종필 푸른사상사 2022 푸른사상 Vol.39 No.-

온도 및 조사강도 통합보정을 통한 태양광모듈의 전력측정법에 대한 연구

문종필,신정현,이영석,이승재 대한전기학회 2022 전기학회논문지 P Vol.71 No.4

Power measurement for photovoltaic(PV) modules is a key factor in evaluating the performance, safety, and long-term reliability of photovoltaic modules. The power measurement for the PV module is made by measuring the electrical characteristics by a solar simulator, which is an artificial solar light source. These solar simulators are divided into two types, which are the pulse-type simulator and the continuous type simulator. In the pulse simulator, the temperature characteristics are stabilized and there is not temperature difference between the inside and outside of the solar module to be measured. The continuous irradiation simulator has fluctuations in temperature characteristics due to continuous light irradiation, and there is a temperature difference between the inside and outside of the PV module to be measured. The variability of these temperature characteristics can be improved through temperature correction. In addition, the convenience of measurement can be improved by predicting the power and correcting the irradiance to the temperature correction. The integrated correction of temperature and irradiance proposed in this paper can be contributed to the power measurement of PV modules in the continuous type simulator.

배전시스템 신뢰도 개요 및 동향

문종필,김재철 대한전기학회 2007 전기의 세계 Vol.56 No.4