가상 현실 기반 철강 공정 조업 교육 시스템

최자영,이진휘,김용수,김석,Choi, Ja-Young,Lee, Jin-Hwi,Kim, Yong-Soo,Kim, Seok 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.21 No.8

This paper will introduce the development case study about virtual-reality-based operation training system for steel making process. Steel making process consist iron making process to create liquid steel, pig iron, by reduction process, steel making process to make molten steel by refining, continuous casting process to make slab, and rolling process to make final product like coil, plate. This steel making process deals with liquid and solid products, so facilities of steel making process are very various and complicated. In addition, according to various customer requirements, the recycle of facilities and recipes changing have been fast. So the training for skilled operators is very important point. In this paper, we develop steel making training system based virtual reality for training skilled operator. This system consists of virtual machine, virtual HMI, and virtual control panel. And for fitting the characteristics of each process and increasing the education effectiveness, we develop dynamic methods like the method of dynamic education system configuration, initial facilities setup operation education system, and etc.

딥러닝 모델을 이용한 휴대용 무선 초음파 영상에서의 경동맥 내중막 두께 자동 분할 알고리즘 개발

최자영,김영재,유경민,장영우,정욱진,김광기,Choi, Ja-Young,Kim, Young Jae,You, Kyung Min,Jang, Albert Youngwoo,Chung, Wook-Jin,Kim, Kwang Gi 대한의용생체공학회 2021 의공학회지 Vol.42 No.3

Measuring Intima-media thickness (IMT) with ultrasound images can help early detection of coronary artery disease. As a result, numerous machine learning studies have been conducted to measure IMT. However, most of these studies require several steps of pre-treatment to extract the boundary, and some require manual intervention, so they are not suitable for on-site treatment in urgent situations. in this paper, we propose to use deep learning networks U-Net, Attention U-Net, and Pretrained U-Net to automatically segment the intima-media complex. This study also applied the HE, HS, and CLAHE preprocessing technique to wireless portable ultrasound diagnostic device images. As a result, The average dice coefficient of HE applied Models is 71% and CLAHE applied Models is 70%, while the HS applied Models have improved as 72% dice coefficient. Among them, Pretrained U-Net showed the highest performance with an average of 74%. When comparing this with the mean value of IMT measured by Conventional wired ultrasound equipment, the highest correlation coefficient value was shown in the HS applied pretrained U-Net.

B2B 산업재 거래에서 서비스 품질 측정과 충성도와의 관계

최자영 ( Ja Young Choi ),박주영 ( Ju Young Park ) 한국품질경영학회 2007 품질경영학회지 Vol.35 No.1

This study investigated the relationship between business-to-business service quality and loyalty by applying the IMP (International/Industrial Marketing and Purchasing Group) model. The study found that six dimensions of service quality which were product exchange, financial exchange, information exchange, social exchange, cooperation, and adaptation explained B2B service quality very well. More specifically, the study found that service quality dimensions of social exchange, cooperation, and adaptation were more important than those of product exchange, financial exchange, and information exchange. The study also found a positive relationship between service quality and loyalty. In fact, organizational buyers appeared to show greater loyalty as they perceived service quality better.

전 (前) 5 세기 아테나이 정치적 투쟁의 성격 - arete 의 분석을 중심으로 -

최자영(Ja Young Choi) 경북사학회 1981 복현사림 Vol.3 No.1

N/A

12 주간의 웨이트 트레이닝이 신체형태 및 구성에 미치는 영향

최자영(Choi Ja Young),김기진(Kim Ki Jin) 한국사회체육학회 2000 한국사회체육학회지 Vol.14 No.-

The purpose of this study is to examine the influence of weight training program to body shape and body composition of men and women. This study executed 12 weeks weight training program to 6 men and 6 women who are healthy, and then analyzed the data. In result of executing weight training program, there wasn't any significant change of body shape, but it was the significant reduction of body fat percentage (p<0.05). And there wasn't any significant change in all the adipose quantity and abdominal skinfold thickness. In conclusion, the weight training program is considered to be a desirable method which can prevent and cure obesity by reducing the percentage of body fat.

논문(論文) : 엘레우시스와 아테네: 고대 그리스 폴리스의 정치적,지역적 연계의 유연성

최자영 ( Ja Young Choi ) 한국서양고대역사문화학회 2008 서양고대사연구 Vol.22 No.-

동양과 서양의 약초학 비교

최자영(Choi Ja-Young) 계명사학회 2006 계명사학 Vol.17 No.-

It has been argued that whereas traditional Eastern medicine gives much more emphasis on the circulation of the body as a whole. Western medicine makes analytic approaches on the parts of the body. In my opinion, however, the differences between them could not simply be defined, as there are various trends in each of them and which trends get the upper hand varies according to the period or social class being discussed. An example of this fact can be found in botanical medicine. The Eastern botanical medicine verifies the transition, from the stage in which the Theory of Yin-Yang (Dark-Bright. or Negative-Positive), or the Yin-Yang Five Elements, was not yet applied to, through the stage the theory began to appear in its rudiments, and to the later phase that it strengthens itself to be applied. The less the influences of Yin-Yang Five Elements Theory is. the more it is similar to the Greek botanical medicine as the origin of Western medical trends. This essay tries to show that the traditional medicines of the Chinese and the Greeks have common elements as well as differences, But, the differences do not lie in their viewpoints of the body, between regarding it as a whole and analytic approaches to it, respectively, as these two viewpoints can be found, in my opinion, in both China and Greece. For this purpose, will be discussed the Chinese traditional books of botanical medicine on the one hand, that is, Shennong's Classic of Materia Medica and Special Script of Famous Doctor which are scarecely influenced by the metaphysical theory of Yin-Yang, and the Harm-Cold Theory, which is in the early stage of being influenced by the Yin-Yang Theory, and the Medical Botany of Dioskurides of Greece, on the other hand, to compare the viewpoints for the effect of botanical plants between the East and the West. For almost all the kinds of medical plants, in Greece the effect of them refers to concrete organs of the body or detailed name of the disease, but in China it refers to more abstract and general concepts. for example, weakness (혹은 vacancy, 虛), vitality (혹은 Spirit, 氣), strengthening one's muscles and bones, lessening vitality, etc. Furthermore, in China the great concern is given to removing hunger. In Greece, however, references are more frequently made to blood angiostenosis (blocking) and constipation which are largely originated from a supply surplus of nutrition, as well as facilitating menstruation or sexual intercourse for reproduction and natural desire, nephrolith (kidney stone) and vermin-or beast-biting. The difference of knowledges in the effect of medical plants could not be explained without taking into consideration the living environment. China is a country of agriculture, thickly populated and labor intensive. usually not to have enough food materials for all to eat. On the contrary, Greece has much more meat and dairy products made from animals, which easily leads to excretion difficulties and blood angiostenosis as it is even today. The water rich in lime in Greece is a cause of nephrolith as an endemic disease, and the customary pastoral life in the open air makes anavoidable the frequent medical care for being bitten by insects, scorpions, snakes, etc. On the other hand, cinnamon, which is quite widely used as a medical plant in China to warm up the body and cheer up energy, is known only as a spice in Greece. The Greeks with animal foods are comparatively less in need for the medical stuff to warm the body up than the Orientals of vegetable diet.

이주노동자와 일자리 : 에스니시티에 따른 산업,지역분포와 저임금 노동

최자영 ( Ja Young Choi ),이정아 ( Jung A Yi ) 한국산업노동학회 2014 산업노동연구 Vol.20 No.3

이 논문은 이주노동자와 국내 노동시장의 상호관계를 일자리의 측면에서 고찰한다. 통계청 2012년 자료에 따르면 국내 이주노동자는 전체 임금노동자의 약 5%로 무시할 수 없는 규모이며 에스니시티별로 종사산업과 지역분포가 상이하다는 특징이 있다. 북미유럽계는 서울, 경기지역의 교육서비스업에, 중국인은 서울, 경기지역의 제조업과 숙박 및 음식점업에 많이 분포하는데 특히 한국계 중국인은 전체 이주노동자의 45.74%를 차지하므로 에스니시티를 고려하지 않을 경우 이들의 특징이 이주노동자를 과대대표하게 된다. 한편 동남아시아계는 경기, 경남지역의 제조업에 압도적으로 밀집되어 있어 국내 공업단지분포와 유사한 양상을 보인다. 종사산업에 따라 아시아계와 북미유럽계의 임금범주가 상이하게 나타났으며, 농림어업은 전체 임금노동자 대비 이주노동자 비중이 특히 높아 국내 노동시장의 구조가 이주노동자 유입에 영향을 받고 있음을 알 수 있다. 따라서 산업과 지역으로 재구성한 ‘일자리’를 분석단위로 하여 일자리 임금, 최저임금 미만율과 해당 일자리의 인적구성 간의 관계를 살펴보았다. 분석결과 지리적 고정성으로 인해 약한 교섭력을 갖는 취약계층인 여성, 고령자, 저숙련 이주노동자의 비중이 큰 일자리일수록 저임금 비율과 최저임금 미만율이 높다. This paper provides a sketch of the interrelationship between the Korean local labor markets and migrant workers working there. We use the data from Regional Employment Survey and Foreign Employment Survey provided by the National Statistics Office. Our major finding is that different industries and local labor markets are characterized by ethnicities. It follows that different ethnicities have different wage ranges: in particular, ethnic North-American and European migrants are not paid less than Korean workers. We have also found that migrant workers have weak positions coming from the limitation in mobility due to the Korean Employment Permit System (EPS) - this is similar to the case of female and aged workers who are considered vulnerable groups because of their geographical fixedness. This implies that in the jobs where there are more female, aged and migrant workers, the wage rate is lower and the rate of compliance to the minimum wage is also lower.

온라인 리뷰가 매출에 미치는 영향력 분석: 텍스트기반 감성지수를 중심으로

최자영(Ja Young Choi),김현아(Hyeon A Kim),김용범(Yong Bum Kim) 한국유통학회 2020 流通硏究 Vol.25 No.3

본 연구에서는 2019년 8월 13일부터 9월 7일까지 약 4주 동안 통계 프로그램인 R을 이용하여 아마존에서 판매되고 있는 블루투스 스피커 베스트셀러 제품들의 정보들을 수집하였다. 그 이후 수집된 리뷰에 대한 감성분석을 실시하였으며 이를 통해 리뷰의 긍/부정 정도(감성지수)가 매출에 미치는 영향에 대해 분석하였다. 회귀분석 결과, 리뷰의 양과 평점(rating)은 매출에 긍정적인 영향을 미치는 것으로 나타났다. 추가적으로 본 연구에서는 리뷰 데이터를 리뷰의 제목과 내용으로 나누어서 분석을 진행하였는데, 리뷰의 제목에서 긍정적인 단어가 많을수록 매출이 높은 것으로 나타난 반면 제목에 부정적인 단어가 많을수록 매출이 낮은 것으로 나타났다. 또한 리뷰의 내용에서 부정적인 단어가 많을수록 매출이 낮은 것으로 나타났으나 리뷰의 내용에서 드러난 긍정적인 단어들은 매출에 유의한 영향을 미치지 않았다. 마지막으로 매출에 대한 브랜드 명성과 리뷰의 양, 리뷰의 감성지수의 상호작용을 살펴본 결과, 브랜드 명성이 낮은 경우가 높은 경우보다 리뷰의 양이 많을수록 매출에 미치는 영향력이 큰 것으로 나타났고, 리뷰의 제목과 내용에서 나타난 긍정(부정) 점수가 매출에 긍정(부정)적인 영향을 미치는 것으로 밝혀졌다.

공적자기의식과 나르시시즘이 페이스북 브랜드 팬페이지의 공유의도에 미치는 영향

최자영(Ja Young Choi),장은영(Eun Young Jang),이수원(Soo Won Lee) 한국마케팅학회 2013 마케팅연구 Vol.28 No.2

페이스북에서는 자아정체성 표출, 자기표현 맥락에서 자신의 이미지를 표현하는데 유용한 정보들이 주로 이용된다. 본 연구는 브랜드가 가지는 자기표현적 기능이 페이스북에서의 브랜드 정보공유에 영향을 미칠 것으로 보았으며, 이에 따라 자아표현에 유용한 수단이 되는 자아-일치 브랜드가 브랜드 팬페이지 공유에 영향을 미칠 것으로 보았다. 본 연구는 이러한 특성을 반영하여, 이용자들의 특정 심리적 요인에 따른 자아-일치 브랜드 팬페이지에 대한 공유의도의 차이를 검증하고자 하였다. 이를 위해 페이스북 이용과 관련된 심리요인 공적자기의식과 나르시시즘을 중심으로 자아-일치 팬페이지에 대한 공유의도의 차이를 검증하였으며, 또한 이러한 심리적 요인과 공유의도에 대한 브랜드 컨셉(상징적 vs. 기능적)의 조절효과를 분석하였다. 페이스북 이용경험이 있는 20~30대 성인남녀를 대상으로 온라인 설문을 진행하였고, 이를 토대로 심리요인과 브랜드 컨셉에 따른 팬페이지 공유의도를 분석하였다. 연구 결과, 페이스북 이용자의 공적자기의식과 나르시시즘적 성향이 높을수록 자아-일치 팬페이지에 대한 공유의도가 높은 것으로 나타났으며, 브랜드 컨셉(상징적 vs. 기능적)에 따른 상호작용을 검증한 결과, 나르시시즘과 브랜드 컨셉에서 유의한 상호작용이 검증되었다. 즉, 나르시스트적 성향이 강할수록, 상징적 컨셉의 자아-일치 브랜드 팬페이지에 더 높은 공유의도를 갖는다. 본 연구는 이러한 결과를 통해 기업의 팬페이지 운영에 전략적 방향을 제시하고, SNS와 소비자 심리에 대한 이론적 시사점을 제시하고자 한다. Recently, numerous studies have attempted to explore how and why people use facebook. But there has been scant attention to the use behavior of the facebook fanpage, an important tool for the facebook marketing in academic area. This study aims to explore how socio-psychological factors have effects on the share intention of fanpage. Centrally focusing on the self-congruent brand fanpage, we analyzed the effects of public self-consciousness, narcissism and brand concept(symbolic vs. functional) on the fanpage share intention. We conducted online survey from the 20-40 aged facebook users and examined the data. The analysis suggested that public self-consciousness, narcissism, and brand concept were significantly related with the share intention of the self-congruent brand fan page. Specifically, users with a high level of public self-consciousness and narcissism are more likely to share their fanpage than those with low level of self-consciousness and narcissism. And the interaction effect between the narcissism and brand concept on the sharing intention has been shown to be significant. People with high level of narcissism showed higher share intention in the symbolic brand concept than in functional brand concept. But the interaction effect between the public self-consciousness and brand concept was marginally significant. Based on these findings, we suggested theoretical and practical implication.