• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 B
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• pp.635-637
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• 2000

To analyze the transient state of an induction motor, there have been studies for using the magnetic equivalent circuit method (MECM) instead of the time differential finite-element method, MECM which analyzes magnetic equivalent circuits after converting each part of an electric machine into the magnetic circuit elements. has the merits of short calculation-time and comparatively accurate results. To analyze an electric machine with MECM, we have to replace stator and rotor with the magnetic elements and express the air gap, where electromechanical energy conversion takes place, with the permeance. So in this paper, to analyze an Induction Motor with MECM, we express the magnetic equivalent circuit as algebraic equations and then as the matrix for solving easily them.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 추계학술대회 논문집 학회본부 B
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• pp.330-332
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• 2000

To analyze the transient state of an induction motor, there have been studies for using the magnetic equivalent circuit method(MECD) instead of the time differential finite-element method. MECD which analyzes magnetic equivalent circuits after converting each part of an electric machine into the magnetic circuit elements, has the merits of short calculation-time and comparatively accurate results. To analyze an electric machine with MECM, we have to replace stator and rotor with the magnetic elements and express the air gap, where electromechanical energy conversion takes place, with the permeance. So in this study, to analyze an Induction Motor with HECM, we express the magnetic equivalent circuit as algebraic equations and then as the matrix for solving easily them. In particular, all relations are formed with matrixes to solve Mathematically them in the programming process later. As a result, this theory will be the basis on the static and dynamic analysis of an Induction Motor.

• Journal of Positioning, Navigation, and Timing
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• 제10권1호
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• pp.55-66
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• 2021

In this paper, we propose a signal propagation modeling technique for generating a positioning fingerprint DB based on Long Term Evolution (LTE) signals. When a DB is created based on the location-based signal information collected in an urban area, gaps in the DB due to uncollected areas occur. The spatial interpolation method for filling the gaps has limitations. In addition, the existing gap filling technique through signal propagation modeling does not reflect the signal attenuation characteristics according to directions occurring in urban areas by considering only the signal attenuation characteristics according to distance. To solve this problem, this paper proposes a Deep Neural Network (DNN)-based signal propagation functionalization technique that considers distance and direction together. To verify the performance of this technique, an experiment was conducted in Seocho-gu, Seoul. Based on the acquired signals, signal propagation characteristics were modeled for each method, and Root Mean Squared Errors (RMSE) was calculated using the verification data to perform comparative analysis. As a result, it was shown that the proposed technique is improved by about 4.284 dBm compared to the existing signal propagation model. Through this, it can be confirmed that the DNN-based signal propagation model proposed in this paper is excellent in performance, and it is expected that the positioning performance will be improved based on the fingerprint DB generated through it.

• 한국지역지리학회지
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• 제13권4호
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• pp.438-453
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• 2007

경동시장 한약상가는 조선시대부터 한약의 중심지이던 종로 4,5,6가 일대 한약상이 1960년대부터 이쪽으로 이동하기 시작하면서 발달하였다. 이 상가는 편리한 교통을 바탕으로 한약도매상의 성격을 띠면서 성장했다. 한약상가 내에는 다양한 한방관련 업종이 분포하고 있다. 최초 연구를 수행했던 1994년 당시에는 한의원이 주를 이루었으나 2007년에는 도매 중심의 한약국이 한의원을 대체하는 현상이 현저해졌다. 여기에는 한의사의 노령화가 크게 관여하였다. 경동시장 한약상가는 전국 약재물동량의 70%를 점유하고 있으며, 이 가운데의 70% 정도가 외국산이다. 과거에 비해 현대화된 건물이 속속 들어서 한약상가의 외관과 규모는 발전하였지만 실제 상황은 활기를 띠지 못하고 있는 형편이다. 본 연구의 목적은 1994년부터 2007년까지 13년간의 변화상을 고찰하고, 변화의 주된 원인을 규명하고자 하였다. 그간 경동시장 한약상가는 현대화된 모습으로 변모하였으나 새로 들어선 한방건물의 영업 실패의 주된 이유를 '장소에 대한 관성'이라는 개념으로 설명했다. 경동시장 한약상가는 우리나라의 전반적인 경기침체와 맞물려 어려움을 겪고 있지만 한방특구로 지정되면서 세계 최대 규모의 한약상가로서, 새로운 관광자원으로서 발돋움하려는 노력을 지속하고 있다.

• 한국보육지원학회지
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• 제6권2호
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• pp.135-154
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• 2010

본 연구는 어머니와 보육시설장을 대상으로 보육시설의 질에 대한 인식을 살펴보고 두 집단간 보육시설의 질에 대한 인식의 차이를 살펴보았다. 연구대상은 서울시 관악구, 서초구, 동작구와 경기도 수원시와 안양시에 소재한 보육시설의 시설장 178명과 해당 보육시설에 자녀를 보내는 어머니 166명이었다. 보육시설의 질에 대한 인식을 알아보기 위해 선행연구를 참고하여 본 연구의 목적에 맞게 보육시설 질 척도 설문지를 개발하였다. 수집된 자료는 SPSS 12.0 프로그램을 사용하여 독립표본 t-검증을 실시하여 분석하였다. 본 연구결과는 다음과 같다. 첫째, 어머니는 보육서비스의 질에 있어서 과정적인 질을 가장 높게 인식하였고 서비스의 질, 구조적인 질의 순으로 보육시설의 질을 평가하였다. 둘째, 보육시설장은 보육서비스의 질에 있어서 과정적인 질을 가장 높게 인식하였고 구조적인 질, 서비스의 질의 순으로 보육시설의 질을 평가하였다. 셋째, 보육시설장이 어머니보다 전반적으로 자녀가 다니는 보육시설의 질을 높게 인식하였으며 과정적인질, 구조적인 질, 서비스의 질의 세 가지 하위요인에 있어서 어머니와 보육시설장간 인식의 차이가 있었다.

• 한국대기환경학회지
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• 제31권1호
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• pp.72-82
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• 2015

We constructed greenhouse gas (GHG) and air pollution (AP) integrated sink/emission inventories and evaluated the environmental value for the vegetation sector in Seoul during year 2010. The data of vegetation, classified into four sectors of cultivated land, forest land, park and street tree, were obtained from Statistics Korea and Seoul City. Based on the previous studies, only $CO_2$ was chosen as GHG sink by vegetation. $NO_2$ and $SO_2$ were chosen as AP sink by vegetation, while isoprene, monoterpene, other VOC (OVOC) and NH3 were chosen as AP emission from vegetation. Estimation methodology and sink/emission factors were gathered from reports and published literatures. Estimated GHG sink by vegetation during year 2010 was 12,987,173 $tonCO_{2eq}$, of which approximately 1/4 was from pure vegetation and the remaining 3/4 from vegetation soil. AP sink and emission were estimated to be 23,309 tonAP and 2,629,797 tonAP, respectively. The analysis by administrative districts in Seoul revealed that among 25 districts, Seocho-gu, Nowon-gu, Eunpyeong-gu, Gwanak-gu and Gangbuk-gu were the major districts in GHG and AP sink/emission inventories for vegetation sector. Environmental value of vegetation as a function of GHG and AP sink, was estimated as 800 billion won, corresponding to 5% of the total cost of the forest land in Korea evaluated as a public function.

• 동의생리병리학회지
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• 제32권3호
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• pp.178-183
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• 2018

Pruritus is the most prominent symptom of atopic dermatitis and other skin diseases. It is not easily improved and is a major factor that threatens the quality of life of patients and their families. The purpose of this study was to evaluate the effect of HyungGae-Water, which was bath preparation made from Korean medicine herbs, for children and adolescents suffering pruritus. The participants were 50 boys and girls aged from 2 to 15 years old. The HyungGae-Water was used once a day for 6 weeks, and we were followed up three times every two weeks. Of 50 participants enrolled, 47 completed the study. The outcome variables were dermatology quality of life scales in children, pruritus VAS, and investigator global assessment (IGA). The results of the study show that the dermatology quality of life is significantly improved and the VAS of pruritus has meaningful changes. In the IGA, moderate or severe improvement was observed in 48.9% and slight improvement in 17%. There were seven suspected or less relevant adverse events using HyungGae-Water. The present results suggest that the HyungGae-Water has alleviating effect for the pruritus in children and adolescents.

• 한국작물학회지
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• 제39권2호
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• pp.198-204
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• 1994

농업에 관한 우리나라 전문 고농서는 조선조에 많이 발간되어 중·근세 농업문화를 이해하는데 도움이 되었다. 여기서는 고농서, 국내외 문헌 및 자료를 바탕으로 담배의 명칭과 그의 전래를 요약한바 o남영초, 남초, 연초, 어, 연초, 서초, 왜초, 호초, 담파고등으로 기록되고 o국내문헌은 무오년(1618년)을 전후한 년대에 일본 전래설을 통설로 기술되어 있으나 o 일본이 과거 중국, 한국과의 문화교류와 내량, 평안시대에 많은 작물을 도입재배한 역사적 실증과 o한국에의 전래근거가 없다는 인접국(중국, 일본)의 이설 o우리나라 담배 산지 재래종 기원항설과 o김대현(1553-1612년)지방거주와 유정과의 서신사기, 구전등으로 보아 o임진왜란 중 (1592-98년) 명나라 유정장군의 병사에 의한 중국 전래설이 가장 신빙성이 있다고 하겠다.

• 대한한의학방제학회지
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• 제25권2호
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• pp.167-177
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• 2017

Objectives : This study aimed to evaluate inhibitory effects of GHJ on allergic inflammatory response in human mast cells (HMC-1). Methods : To investigate the inhibitory effect of GHJ (62.5, 125, 250, 500, $1000{\mu}g/mL$), HMC-1 cells were stimulated with phorbol 12-myristate 13-acetate plus calcium ionophore A23187 (PMACI). Enzyme-linked immunosorbent assays (ELISAs), RT-PCR and Western blot analysis were investigated using GHJ extract. Results : GHJ inhibited levels of $TNF-{\alpha}$ and IL-6 of $1000{\mu}g/mL$ concentration in ELISA and mRNA expression. GHJ had inhibitory effects in level of MAPKs, $p-I{\kappa}B-{\alpha}$ and p-NF-kB also. GHJ attenuated Compound 48/80-stimulated histamine release. In addition, GHJ inhibited PCA reaction in vivo. Conclusion : This study indicated that GHJ extract can inhibit allergic responses in HMC-1 cell.

• 한국식품조리과학회지
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• 제32권1호
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• pp.84-95
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• 2016

This study investigated the food behavior and nutritional status of children using the Nutrition Quotient (NQ). The subjects for this study were 974 students and their parents who lived in Seocho-gu, Gwanak-gu, and Dongjak-gu, Seoul. The average NQ score of the subjects was 68.3, which was a medium grade. The mean scores for balance and moderation were above the thresholds, whereas the mean scores for diversity, regularity, and practice did not reach the thresholds. According to the results of evaluation by NQ, the subjects may have insufficient intake of calcium, iron, potassium, zinc, vitamin A, and vitamin C. NQ and NQ factors were different according to the general characteristics and home background characteristics of the subjects. The mean scores for the moderation factor was significantly lower as the eating out frequency increased (p<0.001). The mean scores for balance, moderation, and regularity factors were significantly higher, with higher parents educational level. It is necessary to choose diverse side dishes, vegetables and also foods with balanced nutrition when eating out.