The relationship between spontaneous abortion and female workers in the semiconductor industry

Heechan Kim,Ho-Jang Kwon,Jeongbae Rhie,Sinye Lim,Yun-Dan Kang,Sang-Yong Eom,Hyungryul Lim,Jun-Pyo Myong,Sangchul Roh 대한직업환경의학회 2017 대한직업환경의학회지 Vol.29 No.-

Background: This study investigated the relationship between job type and the risk for spontaneous abortion to assess the reproductive toxicity of female workers in the semiconductor industry. Methods: A questionnaire survey was administered to current female workers of two semiconductor manufacturing plants in Korea. We included female workers who became pregnant at least 6 months after the start of their employment with the company. The pregnancy outcomes of 2,242 female workers who experienced 4,037 pregnancies were investigated. Personnel records were used to assign the subjects to one of three groups: fabrication process workers, packaging process workers, and clerical workers. To adjust for within-person correlations between pregnancies, a generalized estimating equation was used. The logistic regression analysis was limited to the first pregnancy after joining the company to satisfy the assumption of independence among pregnancies. Moreover, we stratified the analysis by time period (pregnancy in the years prior to 2008 vs. after 2009) to reflect differences in occupational exposure based on semiconductor production periods. Results: The risk for spontaneous abortion in female semiconductor workers was not significantly higher for fabrication and packaging process workers than for clerical workers. However, when we stratified by time period, the odds ratio for spontaneous abortion was significantly higher for packaging process workers who became pregnant prior to 2008 when compared with clerical workers (odds ratio: 2.21; 95% confidence interval: 1.01–4.81). Conclusions: When examining the pregnancies of female semiconductor workers that occurred prior to 2008, packaging process workers showed a significantly higher risk for spontaneous abortions than did clerical workers. The two semiconductor production periods in our study (prior to 2008 vs. after 2009) had different automated processes, chemical exposure levels, and working environments. Thus, the conditions prior to 2008 may have increased the risk for spontaneous abortions in packaging process workers in the semiconductor industry.

A Study on Production Methods of Stereographic Images Use of Motion Graphics

Hohyun Jang,Heechan Pyo (사)한국디지털디자인협의회 2007 (사)한국디지털디자인협의회 conference Vol.2007 No.1

The field of stereographic image has reached to a point where it could be viewed through a digital TV or a monitor without separate devices through the process of numerous evolutions from the former red and blue glasses method through rapid development of multimedia technology. Human eyes receive visual information on the object through left and right eyes and these are made to perceive the object in three-dimensions through the brain. Therefore, since the image contents that we see are different from the information of the object that os perceived through the human eyes, there always been a constant demand for more natural and realistic image contents as seeing the object through the real eyes. The stereographic images are replacing the former 2-dimensional images based on the next generation multimedia environment providing incomparable power of information transfer and sense of reality throughout each area of information communication, broadcasting, medical service, education, military purpose, game, animation, virtual reality, CAD, and industrial technology. In response to these social demands, a need to understand the stereographic image production system and study production method has become crucial. The objective background of this study is to give support as foundation information in the stereographic image production using motion graphics in the future by studying reasonable stereofraphic motion graphics based on the problems and limitations discovered from conducting a project with Kwangnwoon University from March to May of this year from my company, MEMOS Pictures Co.,Ltd., which is a multimedia image contents production company, on stereographic promotion image and 3-dimensional education contents production. For study method and procedures, reference research for studying its theoretical background and step by step analysis of the production process of stereographic motion graphic contents were conducted to find the problems and limitations. Hence as a means of increasing the level of satisfaction and fulfilling emotions of consumer's demand from the current 2D based image contents, the possibility of using motion graphics in the process of trans ferring stereographic image contents was studied and a production technique for expressing the sense of reality and existence more efficiently was suggested. Especially, this study is significant in the aspect that, considering most stereographic images of the past and present are 3D graphic oriented animation and 3D films, this study tried to suggest a possibility of producing motion graphics produced using 3D graphics and typography into a stereographic image.

A Study on Production Methods of Stereographic Images Use of Motion Graphics

Hohyun Jang,Heechan Pyo 한국디자인지식학회 2007 한국디자인지식학회 Conference Vol.2007 No.8

The field of stereographic image has reached to a point where it could be viewed through a digital TV or a monitor without separate devices through the process of numerous evolutions from the former red and blue glasses method through rapid development of multimedia technology. Human eyes receive visual information on the object through left and right eyes and these are made to perceive the object in three-dimensions through the brain. Therefore, since the image contents that we see are different from the information of the object that os perceived through the human eyes, there always been a constant demand for more natural and realistic image contents as seeing the object through the real eyes. The stereographic images are replacing the former 2-dimensional images based on the next generation multimedia environment providing incomparable power of information transfer and sense of reality throughout each area of information communication, broadcasting, medical service, education, military purpose, game, animation, virtual reality, CAD, and industrial technology. In response to these social demands, a need to understand the stereographic image production system and study production method has become crucial. The objective background of this study is to give support as foundation information in the stereographic image production using motion graphics in the future by studying reasonable stereofraphic motion graphics based on the problems and limitations discovered from conducting a project with Kwangnwoon University from March to May of this year from my company, MEMOS Pictures Co.,Ltd., which is a multimedia image contents production company, on stereographic promotion image and 3-dimensional education contents production. For study method and procedures, reference research for studying its theoretical background and step by step analysis of the production process of stereographic motion graphic contents were conducted to find the problems and limitations. Hence as a means of increasing the level of satisfaction and fulfilling emotions of consumer’s demand from the current 2D based image contents, the possibility of using motion graphics in the process of trans ferring stereographic image contents was studied and a production technique for expressing the sense of reality and existence more efficiently was suggested. Especially, this study is significant in the aspect that, considering most stereographic images of the past and present are 3D graphic oriented animation and 3D films, this study tried to suggest a possibility of producing motion graphics produced using 3D graphics and typography into a stereographic image.

Research on the Media Literacy Pertaining to Motion Graphic

Seungjae Lee,Janghan Lim,Heechan Pyo 한국디자인지식학회 2007 한국디자인지식학회 Conference Vol.2007 No.8

Research on the Media Literacy Pertaining to Motion Graphic

Seungjae Lee,Janghan Lim,Heechan Pyo (사)한국디지털디자인협의회 2007 (사)한국디지털디자인협의회 conference Vol.2007 No.1