미국 희곡 속에 나타난 자살의 문제 - 아서 밀러의 극을 중심으로

이상혁 한국중앙영어영문학회 2015 영어영문학연구 Vol.57 No.3

The purpose of this paper is to interpret the essence of suicide, which is the unknown for we cannot experience it, through the various aspects of suicide depicted in literature, such as in Miller’s plays. Although suicide has been considered a subject of fear and taboo throughout most of history, literature, which is often referred to as a mirror of human history, has seriously dealt with suicide as a form of death, the eternal enigma of human existence, even during the periods when suicide was not permitted. As a result, suicide currently has become one of the most prominent interests in literature. Though suicide in literature is fictional, it embraces various mechanisms of actual suicide and symbolically represents existential problems originating from the agony of the period, irregularities and corruption in our society, and frustration and despair due to damage to an individual’s value and dignity. Therefore, we can indirectly understand the cause, process, and effect of suicide in the real world. Many cases of suicide are introduced particularly in Miller’s plays. Through such cases, he charges the individual, the people around him, and the society with responsibility for one’s ruin caused by the alienation, one of the social ills in a modern materialistic civil society.

Torque Sensor Calibration Using Virtual Load for a Manipulator

이상혁,김영렬,송재복 한국정밀공학회 2010 International Journal of Precision Engineering and Vol. No.

Accurate load sensing of a manipulator becomes increasingly important in performing various tasks involving contact with an environment. Most of the research has been focused on improving the hardware of a force/torque sensor. The torque sensors for a manipulator suffer from crosstalk, which is difficult to compensate for even with sophisticated calibration. This research proposed a novel calibration method composed of two steps. Through the primary calibration, the torque sensor output can be related to the joint torques. The secondary calibration, which is based on a virtual load, is conducted to compensate for the crosstalk of a torque sensor. The virtual load is obtained from the sensed joint torques and manipulator configuration. Using the proposed calibration method, the external load acting on the end-effector of a manipulator can be accurately measured even with relatively lowquality torque sensors. The experimental results showed that the error in the load sensing was significantly reduced by the proposed calibration method.

도시지역 도로의 이산화티타늄 적용에 따른 질소산화물 농도특성 기초분석

이상혁,이종원,김문경,박기수,박희문 한국도로학회 2020 한국도로학회논문집 Vol.22 No.6

PURPOSES : This study analyzes the characteristics of nitrogen oxide concentration by applying titanium dioxide to existing roads in urban areas, using correlation analysis and a generalized linear model. METHODS : To analyze the characteristics of nitrogen oxide concentration with/without applying titanium dioxide to the urban road segment, data acquisition was conducted for nitrogen oxide concentration, weather information, and traffic information, etc., and a correlation analysis was conducted for each factor, with/without applying titanium dioxide to the roads. In addition, nitrogen oxide concentration generation models with/without the application of titanium dioxide to the roads were estimated using a generalized linear model. RESULTS : The results demonstrate that relative humidity and temperature were found to be slightly correlated with the nitrogen oxide concentration, both with and without the application of titanium dioxide to the roads; however, wind speed, solar radiation, and traffic volume were found to have somewhat low correlation according to the results of a correlation analysis. Moreover, relative humidity, temperature, solar radiation, and traffic volume were significant when titanium dioxide was applied to the roads, based on the estimated model from a generalized linear model, and the wind speed, solar radiation, and traffic volume were significant for the absence of titanium dioxide on the roads. CONCLUSIONS : Analytical results indicated that the characteristics of nitrogen oxide concentration vary depending on the application of titanium dioxide to the roads. In particular, when titanium dioxide was applied to the roads, the relative humidity and temperature were analyzed; according to both analyses, i.e., correlation analysis and a generalized linear model, the nitrogen oxide concentration was affected.

Advanced Treatment of Food Waste Leachate Using the Aeration Reactor with High Efficiency Pure Oxygen

이상혁,고재춘 한국도시환경학회 2010 한국도시환경학회지 Vol.10 No.2

Using aeration reactor of high efficiency pure oxygen to remove the high concentration wastewater generated by the solution separated from food waste, the results got from a pilot test are summarized as follows. 1. The process composition to remove the high concentrated organic matter and the nitrogen of wastewater is the facilities to control the primary high liquid separation and the second biological control process is composed of the anoxic tank and the high pure oxygen aeration reactor and the separation membrane tank, and the advanced control is composed of the ozone and activated carbon treatment facility. 2. As the average concentration of 200,000 mg/L is separated into high liquid to mix with excess sludge, the water separated from high liquid is able to get the average of 32,000 mg/L, and when the load of about 20 kgCODCr/m3·d removes by the reactor of the pure oxygen aeration with high efficiency, it has been removed over the 98.7% to an outflow with average 422 mg/L. 3. As the BOD flows into the raw wastewater with 90,000 mg/L, an average concentration shows 32,000 mg/L after a primary high liquid separation and is able to get the effluent water under below 10 mg/L to remove 99.9% by the aeration reactor of high efficiency pure oxygen. 4. T-N represents average 1,520 mg/L when the raw wastewater with about 3,500 mg/L is separated from high liquid, and it is removed to the efficiency of 94.1% or more when it is controlled to inflow in the aeration reactor of high efficiency pure oxygen. 5. The T-P concentration of the separated liquid is average 723 mg/L and approximately 75% are removed by high liquid separation after a primary dewatering.

이석주교수정년기념특집 : 국어학 ; 국어학사를 다시 생각함 - 정의, 방법, 범위의 문제를 중심으로 -

이상혁 한성대학교 한성어문학회 2007 漢城語文學 Vol.26 No.-

머신러닝을 이용한 초미세먼지와 질소산화물 농도 특성분석 연구

이상혁,이종원,김문경,박기수,박희문 한국도로학회 2020 한국도로학회논문집 Vol.22 No.4

PURPOSES : This study analyzes the characteristics of generated fine particulate matter (PM2.5) and nitrogen oxide (NOX) at roadsides using a statistical method, namely, a generalized linear model (GLM). The study also investigates the applicability and capability of a machine learning methods such as a generalized regression neural network (GRNN) for predicting PM2.5 and NOX generations. METHODS : To analyze the characteristics of PM2.5 and NOX generations at roadsides, data acquisition was conducted in a specific segment of roads, and PM2.5 and NOX prediction models were estimated using GLM. In addition, to investigate the applicability and capability of a machine learning methods, PM2.5 and NOX prediction models were estimated using a GRNN and were compared with models employing previously estimated GLMs using r-square, mean absolute deviation (MAD), mean absolute percentage error (MAPE), and root mean square error (RMSE) as parameters. RESULTS : Results revealed that relative humidity, wind speed, and traffic volume were significant for both PM2.5 and NOX prediction models based on estimated models from a GLM. In addition, to compare the applicability and capability of the GLM and GRNN models (i.e., PM2.5 and NOX prediction models), the GRNN model of PM2.5 and NOX prediction was found to yield better statistical significance for r-square, MAD, MAPE, and RMSE as compared with the same parameters used in the GLM. CONCLUSIONS : Analytical results indicated that a higher relative humidity and traffic volume could lead to higher PM2.5 and NOX concentrations. By contrast, lower wind speed could affect higher PM2.5 and NOX concentrations at roadsides. In addition, based on a comparison of two statistical methods (i.e., GLM and GRNN models used to estimate PM2.5 and NOX), GRNN model yielded better statistical significance as compared with GLM.

『正音發達史』(1946)에 제시된 『訓民正音』<해례>(1446)의 번역과 분석에 대하여 :<해례>의 주해와 평해를 중심으로

이상혁 고려대학교 한국언어문화학술확산연구소 2019 Journal of Korean Culture Vol.46 No.-

In Korean language studies, the value of Hong Gimun's work has never been fully appreciate. It was partly because he chose North Korea in 1948 and, for another reason, he was rarely considered a Korean language researcher. However, he was the person who first tried translating Hunminjeongeum (『訓民正音』) in Korean language. And, he was a Korean researcher who wrote a renowned book called 『正音發達史』. This paper aims at providing new perspectives for the revised evaluation and empirical analysis of his text. In this paper, the historical context of Hong Gimun's translation of Hyerye (解例) in Hunminjeongeum is discussed in three aspects. First, this paper will present, explaining the translation structure of Hyerye (解例), through 『正音發達史』, which is evaluated as his excellent work in this article. Second, more focus is put on Hyerye (解例) including six parts, so called Jejahae(制字解), Choseonghae(初聲解), Jungseonghae(中聲解), Jongseonghae(終聲解), Haojahae(合字解), Yongjarye(用字例) described in 『正音發達史』. It is successfully found that Hong Gimun was without doubt original with his incisive analysis and interpretation. Therefore, it is no exaggeration to say that Hong Gimun showed enough linguistic significance of the terminology that he used in his text. After all, this paper is a micro review of the research of Hon Gimun until 1948 that has seldom dealt with in Korean linguistics fields. Thus, this paper is to re-evaluate the linguistic issues focusing on Hyerye (解例) in Hunminjeongeum, discussing his works from the perspectives of Korean linguistics history. 이 논문에서는 홍기문의 저서 『正音發達史』(1946) 상권에 전재된 『訓民正音』<解例>의 번역, 주해, 평해의 주요한 내용을 살펴보고, 홍기문의 훈민정음 번역과 그 연구의 특징을 탐색하였다. 전체 <해례> 내용을 모두 살펴보는 것은 방대한 작업이기 때문에 이 논문에서는 첫째로 『正音發達史』를 통해 그 텍스트에 드러난 <해례>의 번역 구조를 살펴보고, 둘째로 『正音發達史』 상권에 전재된 <해례>의 제자해, 초성해, 중성해, 종성해, 합자해, 용자례에서 주목할 만한 번역과 그에 대한 홍기문의 주해와 평해에 대한 분석과 비평의 국어학적 의미를 살펴보았다. 『正音發達史』(1946)에 전재된 『訓民正音』 번역, 주해, 평해는 『訓民正音』에 대한 최초의 해설서로서 역사적으로 평가받아야 한다. 제자해, 초성해, 중성해, 종성해, 합자해의 주해 및 평해를 통해서 홍기문식 훈민정음 학술용어들을 다수 확인하였으며, 특히 주해에서 중국 사료 문헌의 전거(典據) 제시는 주목할 만하다. 그와 아울러 평해를 통해서 홍기문은 『訓民正音』<解例>를 이해하는 그의 독특한 관점을 제시하였다. 이러한 홍기문만의 용어의 설정은 『訓民正音』 원본이 발견된 이후에 처음으로 이루어진 소중한 성과였다. 또한 국어사 연구에서 각 시대별 어휘 대응을 통해 어휘 변천의 흐름을 조망한《용자례》의 주해와 평해는 국어사에서 의미 있는 초창기 연구 성과로 판단된다.

통계적 방법을 이용한 복층 저소음포장의 소음저감효과 분석

이상혁,한대석,유인균,이수형 한국도로학회 2017 한국도로학회논문집 Vol.19 No.6

PURPOSES : The purpose of this study is to compare noise reduction quantities between before/after two-layer low noise pavement implementation using equivalent noise level analysis and to analyze the noise reduction effects of the two layer low noise pavement with a statistical method such as the Anderson-Darling Test.METHODS: In order to compare and to analyze noise reduction effects between before/after two-layer low noise pavement implementation, data acquisition as noise levels on a roadside and an apartment rooftop was conducted in the study area. The equivalent noise level was estimated in order to compare noise reduction quantities and the Anderson-Darling Test was carried out for estimating noise reduction effects of the two-layer low noise pavement.RESULTS: The equivalent noise levels of before/after two-layer low noise pavement implementation for the roadside during the daytime are 65.355 dB and 63.520 dB and during the nighttime are 62.463 dB and 59.088 dB. The equivalent noise levels for the apartment rooftop during daytime are 57.301 dB and 59.088 dB and during the nighttime are 54.616 dB and 52.464 dB. Also two-layer low noise pavement decreased the noise reduction effects estimated with the statistical method as the Anderson-Darling test for the roadside during the daytime by around 66.68% and decreased noise reduction effects on the roadside during the nighttime by 0.70%. Moreover it reduced noise reduction effects in the apartment rooftop during the daytime and nighttime by 0% and 96.32%, respectively.CONCLUSIONS : Based on the result of this study, two-layer low noise pavement can positively affect noise reduction during both the daytime and nighttime according to the results of estimating the equivalent noise levels and the Anderson-Darling test.

고분자 담지제에 의한 청주공단내 공장배기가스의 효율적 처리기술에 관한 연구( II ) - 고분자 담지제의 흡착실험을 중심으로 -

이상혁,이영순,전종한 한국안전학회 1993 한국안전학회지 Vol.8 No.1

Two major hazardous gases. SOx and NOx. are emissioned from fossile fuels. SOx has been removed when oil is refined but NOx hasn't. So NOx is very serious problem in air pollution now There are several technologies to remove NOx. e.g. cooling method. scrubbers method. combustion method, polymer membrane method and adsorbent methods. Polymer membrane and adsorbent methods have good economic merit in removal systems of low content hazard gases. Traditional absorbents are porous silicas, aluminas. active carbon and zeolites. But these absorbents act only physisorption which has less removal performance than chemisorption. In this study. polymeric absorbent which has chemisorption as well as physisorption was analyzed about chemical structure and experimented about optimum operation conditions. The results showed that the chemical structure of the polymeric absorbent was expected as polystyrene having -N-CH$_2$COOH absorbent was revealed about 310$m^2$/g. The molar ratio of absored NO to charged NO in absorption experiments was shown 60% of the polymeric absorbent and 45% of zeolite absorbent at 3$0^{\circ}C$.

Short-term maintenance on a high-sucrose diet alleviates aging-induced sleep fragmentation in drosophila

이상혁,김은영 한국통합생물학회 2021 Animal cells and systems Vol.25 No.6

Sleep is a fundamental behavior in an animal’s life influenced by many internal and external factors, such as aging and diet. Critically, poor sleep quality places people at risk of serious medical conditions. Because aging impairs quality of sleep, measures to improve sleep quality for elderly people are needed. Given that diet can influence many aspects of sleep, we investigated whether a high-sucrose diet (HSD) affected aging-induced sleep fragmentation using the fruit fly, Drosophila melanogaster. Drosophila is a valuable model for studying sleep due to its genetic tractability and many similarities with mammalian sleep. Total sleep duration, sleep bout numbers (SBN), and average sleep bout length (ABL) were compared between young and old flies on a normal sucrose diet (NSD) or HSD. On the NSD, old flies slept slightly more and showed increased SBN and reduced ABL, indicating increased sleep fragmentation. Short-term maintenance of flies in HSD (up to 8 days), but not long-term maintenance (up to 35 days), suppressed aging-induced sleep fragmentation. Our study provides meaningful strategies for preventing the deterioration of sleep quality in the elderly.