• Proceedings of the KIPE Conference
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• 2014.11a
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• pp.205-206
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• 2014

본 논문에서는 3-레벨 인버터 시스템에서 공통 모드 전압 변동 제거를 위한 새로운 Medium Vector PWM(MVPWM)을 제안한다. 제안된 MVPWM의 특징은 다음과 같다. 1) 스위칭 상태와 관계없이 공통모드 전압은 일정하게 유지된다. 2) 무게 중심좌표계 방법에 의하여 구현되므로 구현이 간단하고 직관적이다. 본 논문에서는 시뮬레이션을 통하여 제안된 MVPWM의 위와 같은 특성을 밝히고 태양광 인버터의 제어에 적합함을 입증하였다.

• Proceedings of the KIPE Conference
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• 2010.07a
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• pp.305-306
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• 2010

현재 전 세계적으로 개발 되어진 계통연계형 태양광 인버터는 500kW급 미만이며, MW급 태양광 발전을 위하여 MW급 인버터 개발이 필요 하지만 파워 반도체(IGBT) 소자의 전류 정격의 한계, 방열 그리고 저주파 변압기의 크기 문제로 개발의 어려움이 있다. 본 논문에서는 이러한 단점을 해결하고 현재 개발 되어 있는 350kW급 태양광 인버터 3대를 이용한 최적의 1MW급 발전 시스템 구성 방향을 제시 하였다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.10a
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• pp.179-180
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• 2002

Phytase는 phytic acid (myo-inositol 1,2,3,4,5,6 hexakis dihydrogen phosphate)를 분해하여 phosphate와 phosphate inositol를 만드는 효소이다. Phytic acid는 가축의 사료로 사용하고 있는 곡물의 경우 인함량의 50∼70％를 차지하지만, 물고기, 닭, 돼지와 같은 단위동물은 생체 내에 phytic acid를 분해하는 phytase가 존재하지 않기 때문에 식물성 인의 이용률이 극히 낮아서 성장에 필요한 인을 무기물 형태로 외부에서 따로 충분히 공급해줘야만 한다. (중략)

• Journal of the Korean Society for Railway
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• v.3 no.4
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• pp.23-35
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• 2000

지난 30년간 수도권은 많은 변화를 겪어왔다. 무엇보다도 1970년에 948만 인에 불과하던 인구가 1990년에는 거의 투 배인 1,859만 인으로. 1998년에는 2,130만 인으로 계속 증가하였다. 버스만으로는 대중교수단의 역할을 수행할 수 없게 되자 1970년대 초반부터 도시철도를 건설하기 시작하였다. 이후 도시철도는 서울시전역에서 건설되기 시작해서 이제 서울시내 만에도 8개 노선, 총 연장 280 km의 지하철망을 구축하게 되었다. 지하철 외에 서울시 외곽 도시를 연결하는 7개 노선, 총 연장 172 km의 전철망 또한 구축되었다. 지하철망과 전철망을 합한 수도권내 도시철도망은 이제 14개 노선, 총 연장 452 km에 달하며, 승객수송 분담율에 있어서도 버스보다 더 높은 비중을 차지하고 있다. (중략)

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2001.06a
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• pp.341-345
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• 2001

물류 정보를 표현하는데 있어서 종래의 1 차원 바코드의 데이터 키가 가지는 기능만으로는 해결될 수 없는 상황이 발생함에 따라, 1980 년대 중반에 이르러 많은 데이터를 독립적으로 표현할 수 있는 2 차원 바코드가 등장하게 되어 그 사용이 점점 확산되어가고 있다. 본 논문에서는 가장 널리 사용되고 있는 PDF417 바코드 심볼로지가 어떻게 구성되는지 알아본다. 또한, 최대 1700 개의 데이터를 저장할 수 있는 이 심볼로지로 인코딩된 정보의 코드워드로부터 원래의 데이터를 디코딩하는 방법에 대하며 알아본다. 데이터를 효율적으로 인코딩하기 위해 정보가 숫자인지, ASCII 코드인지, 혹은 바이트 정보인지에 따라 다른 인코딩 방식을 사용하게 되는데, 그에 따른 디코딩 알고리즘을 제안한다.

• Journal of the Korean Data and Information Science Society
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• v.28 no.1
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• pp.49-56
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• 2017

Among the techniques for analyzing big data, the association rule mining is a technique for searching for relationship between some items using various relevance evaluation criteria. This associative rule scheme is based on the direction of rule creation, and there are positive, negative, and inverse association rules. The purpose of this paper is to investigate the applicability of various types of relatively causal strength measures to the types of association rules from the point of view of interestingness measure. We also clarify the relationship between various types of confidence measures. As a result, if the rate of occurrence of the posterior item is more than 0.5, the first measure ($RCS_{IJ1}$) proposed by Good (1961) is more preferable to the first measure ($RCS_{LR1}$) proposed by Lewis (1986) because the variation of the value is larger than that of $RCS_{LR1}$, and if the ratio is less than 0.5, $RCS_{LR1}$ is more preferable to $RCS_{IJ1}$.

• The Journal of the Convergence on Culture Technology
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• v.6 no.1
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• pp.489-494
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• 2020

We propose to designs and to implements a robot analyzing the risk of occurrence of mental disorder of single-person households' workers through the facial expression-detecting system. Due to complex social factors, the number and proportion of single-person households continues to increase. In addition, contrast to the household of many family members, the prevalence of mental disorder among single-person household varies greatly. Since most patients with mental can not detect the disease on their own, counseling and treatment with doctors are often ignored. In this study, we design and implement a robot analyzing the risk of mental disorder of single-person households workers by constructing a system with Q.bo One, a social robot created by Thecorpora. Q.bo One is consisted of Arduino, ar raspberry pie, and other sensors designed to detect and respond to sensors in the direction users want to implement. Based on the DSM-5 provided by the American Psychiatric Association, the risk of mental disorder occurrence was specified based on mental disorder. Q.bo One analyzed the facial expressions of the subjects for a week or two to evaluate depressive disorder, anxiety disorder. If the mental disorder occurrence risk is high, Q.bo One is designd to inform the subject to counsel and have medical treatment with a specialist.

• Journal of agricultural medicine and community health
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• v.42 no.3
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• pp.119-131
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• 2017

Objectives: The purpose of this study was to compare the diabetic management indicators between agriculture, forestry, and fishery workers (AFF) and other occupational adults (non-AFF) in community-dwelling diabetes. Methods: The study population consisted of 22,127 diabetic population ${\geq}19years$ who participated in the 2015 Community Health Survey. Chi-square test and logistic regression analysis was used to compare the diabetic management indicators between AFF and non-AFF. Socioeconomic characteristics such as age, gender, education level, monthly household income, National Basic Livelihood Security status, and marital status was sequentially adjusted. Results: Among total diabetic population, 3,712 people (16.8%) was AFF and 18,415 people (83.2%) was non-AFF. The fully-adjusted odds ratio [OR] (95% confidence interval [CI]) of current non-medical treatment (0.72, 0.66-0.79), measurement of hemoglobin A1c (0.61, 0.55-0.67), screening for diabetic retinopathy (0.76, 0.70-0.83), screening for diabetic nephropathy (0.75, 0.70-0.81), non-alcoholic or moderate drinking (0.70, 0.64-0.78), nutrition label reading (0.83, 0.71-0.98), low salt preference (0.85, 0.78-0.93), dental examination (0.60, 0.54-0.66), scaling experience (0.84, 0.77-0.93), regular toothbrushing (0.66, 0.58-0.76), and diabetes management education (0.84, 0.77-0.92) was significantly lower in AFF compared to non-AFF. In contrast, the fully-adjusted OR (95% CI) of AFF's low stress level (1.39, 1.26-1.52) and adequate sleep duration (1.22, 1.13-1.32) was significantly higher than non-AFF, which are better indicators of diabetic management in AFF. Conclusions: Overall, the level of diabetes management of AFF was not as good as that of non-AFF. In order to improve the level of diabetes management of AFF, a delicate diabetes intervention strategy considering the occupational characteristics of AFF will be needed.

• Journal of Korean Medicine for Obesity Research
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• v.14 no.2
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• pp.63-71
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• 2014

Objectives: This study was designed to investigate the correlation between Sasang constitution and dyslipidemia and the possibility that Sasang constitution can be a risk factor of dyslipidemia. Methods: This study was a retrospective cross-sectional study based on chart review. Seventeen thousand sixty-nine charts which were collected from May 2007 to June 2010 in International Healthcare Service Center, Kyung Hee University Medical Center, were reviewed for the study. Fifteen thousand two hundred fifty charts including Sasang constitutional diagnosis and lipid profiling were selected and we examined the correlation between Sasang constitution and dyslipidemia. Results: After adjusted for body mass index, the levels of total cholesterol and triglyceride were highest in Taeeum group, and lowest in Soeum group. High-density lipoprotein was highest in Soeum group, and lowest in Taeeum group. After adjusted for age, sex, and body mass index, the odds ratios for 'high triglyceride' were 1.716 (1.411~2.087) in Soyang group and 2.021 (1.650~2.475) in Taeeum group compared to Soeum group. The odds ratio for 'high low-density lipoprotein' was 1.229 (1.006~1.501) in Soyang group compared to Soeum group. The odds ratios for 'low high-density lipoprotein' were 1.195 (1.033~1.381) in Soyang group and 1.414 (1.212~1.649) in Taeeum group compared to Soeum group. Conclusions: The lipid profiles and dyslipidemic risk differed across constitutional types, showing constitution type-specific patterns, so that we could infer the possibility that Sasang constitutional types can be a risk factor of dyslipidemia.

• International Commerce and Information Review
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• v.16 no.3
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• pp.159-182
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• 2014

CISG Article 71 (1) states that a party may suspend the performance of his obligations if, after the conclusion of the contract, it becomes apparent that the other party will net perform a substantial part of his obligations as a result of a serious deficiency in his ability to perform or in his creditworthiness or his conduct in preparing to perform or in perfoming the contract. CISG Article 71 (2) states a 'right of stoppage in transit' that if the seller has already dispatched the goods before the grounds described in the preceding paragraph become evident, he may prevent the handing over of the goods to the buyer even though the buyer holds a document which entitles him to obtain them. The present paragraph relates only to the rights in the goods as between the buyer and the seller. Under the right of stoppage in transit, the carrier copes with risks that the seller may claim damages arose from the handing over the goods, if he hand over the goods to the buyer and that the buyer may claim damages, if he deny handing over the goods to the buyer who has the document which entitles him to obtain the goods. Therefore the legal position of the carrier may become weak. This paper purpose to point out the legal weakness of the carrier under the right of stoppage in transit and to provide the proper legal act of the carrier and possible practice related to various characters of the contract of sale of the goods. Although there is the opinion it prevent from handing over the goods to the buyer actually under the interpretation that the buyer should take claim damages to the seller, if the goods are handed over to the buyer under the right of stoppage in transit, it is not appropriate because the opinion may disable the right of stoppage in transit. The right of stoppage in transit could be carried out under any payment conditions except letter of credit and under any mode of transportation except the cases that carrier is the buyer himself or the agent of the buyer. It could be executed regardless the forms of the transport document.