Determinants of Public Phobia About Infectious Diseases in South Korea : Effect of Health Communication and Gender Difference

Jung, Minsoo,Choi, Mankyu,Lee, Tae-Ro SAGE Publications 2015 Asia-Pacific journal of public health Vol.27 No.2

<P>This study investigated the individual and social determinants of the public’s phobia of infectious diseases in South Korea, where collective action was recently fueled by the public phobia over mad cow disease (bovine spongiform encephalopathy [BSE]). Gender-specific multivariate regression was used to compare the public perception of BSE and highly pathogenic avian influenza (HPAI). The analysis results differentiated between the determinants of the phobia for the 2 diseases, BSE and HPAI (N = 1002). As with HIV/AIDS and leprosy, the public fear of HPAI was expressed as a disease phobia that seeks to ensure the social exclusion of infection sources, whereas the fear of BSE was influenced by social and communication factors. Therefore, BSE, unlike previous HPAI, can be rapidly amplified amid the growing distrust in health communication, in which case the social determinants of disease phobia are associated with communicator trust, social values, and political attitude toward diseases rather than disease perception.</P>

Korean Public Administration Research 1999-2009 : Research Themes, Methodologies, and Scholarship

Moon, M. Jae,Kim, Gongrok,Lee, M. Jin SAGE Publications 2014 AMERICAN REVIEW OF PUBLIC ADMINISTRATION Vol.44 No.2

<P>This article examines three major characteristics—themes, research methods, and authorship—of Korean public administration research written in the Korean language during 1999 to 2009. It suggests that this research has evolved and advanced both quantitatively and qualitatively. Recent Korean scholarship can be characterized as consisting of more reform-oriented topics, more quantitative methods, and more diversified authorship. These characteristics were partially caused by increasing social demand for government reform and growing emphasis on methodological rigor in public administration research, as well as increased government research funding for graduate programs. This also concludes that the Korean public administration research has advanced greatly in past decades but needs a better thematic and methodological balance as well as balance between theoretical and prescriptive studies.</P>

Do Age, Gender, and Sector Affect Job Satisfaction? Results From the Korean Labor and Income Panel Data

Jung, Kwangho,Jae Moon, M.,Sung Deuk Hahm, Sage Publications 2007 Review of public personnel administration Vol.27 No.2

<P>Although job satisfaction is a primary human resource management concern, there is little empirical research considering job satisfaction in non-Western countries. In Korea, reforms aim to make the public service more competitive and diverse and have led to the recruitment of more women and young people. This study uses data from the Korean Income and Labor Panel Study to explore the relationship of age, gender, and service sector with job satisfaction. No substantial difference was found in the perceived job satisfaction of public employees of different ages, but an unexpected negative association was found in a subsample of private employees. Korean public and nonprofit employees are more satisfied with their jobs than private employees are but are less satisfied with their wages than with job security and job content. The study supports the expectation hypothesis and suggests there is a gender effect on job satisfaction, particularly for wages and work environment.</P>

Topic-based content and sentiment analysis of Ebola virus on Twitter and in the news

Kim, Erin Hea-Jin,Jeong, Yoo Kyung,Kim, Yuyoung,Kang, Keun Young,Song, Min SAGE Publications 2016 JOURNAL OF INFORMATION SCIENCE Vol.42 No.6

<P>The present study investigates topic coverage and sentiment dynamics of two different media sources, Twitter and news publications, on the hot health issue of Ebola. We conduct content and sentiment analysis by: (1) applying vocabulary control to collected datasets; (2) employing the n-gram LDA topic modeling technique; (3) adopting entity extraction and entity network; and (4) introducing the concept of topic-based sentiment scores. With the query term 'Ebola' or 'Ebola virus', we collected 16,189 news articles from 1006 different publications and 7,106,297 tweets with the Twitter stream API. The experiments indicate that topic coverage of Twitter is narrower and more blurry than that of the news media. In terms of sentiment dynamics, the life span and variance of sentiment on Twitter is shorter and smaller than in the news. In addition, we observe that news articles focus more on event-related entities such as person, organization and location, whereas Twitter covers more time-oriented entities. Based on the results, we report on the characteristics of Twitter and news media as two distinct news outlets in terms of content coverage and sentiment dynamics.</P>

The Evolution of Internal IT Applications and e-Government Studies in Public Administration : Research Themes and Methods

Moon, M. Jae,Lee, Jooho,Roh, Chul-Young SAGE Publications 2014 ADMINISTRATION & SOCIETY Vol.46 No.1

<P>This study reviews research themes and methods used in information technology (IT) in government and e-government research. Although IT/e-government studies (including inward aspects of IT applications in government and e-government studies) continue to increase, they are not comprehensively understood as a subfield within public administration. Based on Rosenbloom’s three competing approaches to public administration (managerial, political, and legal), we investigated the major research themes of IT/e-government studies in public administration. We analyzed 248 IT/e-government articles published in six major public administration journals from 1965 to 2010 to examine IT/e-government research trends in terms of research themes and methods.</P>

Experimental studies on the aerodynamic characteristics of a pantograph suitable for a high-speed train

Lee, Yeongbin,Rho, Joohyun,Kim, Kyu Hong,Lee, Dong Ho,Kwon, Hyeok Bin SAGE Publications 2015 Proceedings of the Institution of Mechanical Engin Vol.229 No.2

<P>The aerodynamic properties of a pantograph that is under consideration for application on Korean high-speed trains are experimentally investigated. The selected experimental models were one-quarter scale pantographs (a double-arm pantograph, single-arm pantograph and a periscope pantograph) with either a rectangular panhead or a panhead with an optimized streamlined shape. To increase the performance and the robustness of the pantograph, the drag coefficient and the fluctuation of the lift coefficient along the angle of attack are simultaneously minimized. In order to confirm the aerodynamic enhancement of the pantograph due to the optimized panhead, the aerodynamic forces are compared with those of a pantograph with a rectangular panhead. To investigate the aerodynamic force distribution of a pantograph, the aerodynamic forces of the lift and drag of the pantograph are measured in wind tunnel tests and analyzed in terms of the pantograph’s components. In addition, wake flows are examined based on variations of the shape of the panhead.</P>

Multi-model approaches to three-axis missile autopilot design under aerodynamic roll angle uncertainty

Won, D-Y,Tahk, M-J,Kim, Y-H,Kim, H J SAGE Publications 2012 Proceedings of the Institution of Mechanical Engin Vol.226 No.9

<P>The problem of designing a robust three-axis missile autopilot that operates under aerodynamic roll angle uncertainty is addressed in this article. A finite number of local state-space models over an aerodynamic roll angle envelope are developed as a multi-model to represent uncertainty bounds. Two design methods with multi-objective output-feedback control are proposed. In the first approach, a classical three-loop autopilot structure is slightly modified for the multivariable autopilot design. The optimal gains in the autopilot structure are automatically obtained by using a co-evolutionary optimization method that addresses competing specifications and constraints. In the second approach, the mixed H-2/H-infinity performance criteria are guaranteed by multi-objective control synthesis via optimization techniques. Both design approaches are used in non-linear simulations with variations in the aerodynamic roll angle to provide satisfactory performance as a three-axis missile autopilot.</P>

Nonlinear aircraft tracking filter utilizing a point mass flight dynamics model

Jeon, Daekeun,Eun, Yeonju,Bang, Hyochoong,Yeom, Chanhong SAGE Publications 2013 Proceedings of the Institution of Mechanical Engin Vol.227 No.11

<P>A nonlinear aircraft tracking filter using a point mass flight dynamics model with three degrees of freedom is presented. While the models used by conventional air traffic control tracking filters are based on simple kinematics, the model for the present filter is based not only on kinematic relations but also on three-dimensional aircraft translational force equations and control variables. This allows for practical and sophisticated implementation of the attitude effects on translational acceleration. The control variables, which consist of the angle of attack, roll angle, and thrust setting, are treated as states with random processes. Tracking with simulation data indicates that the present filter is superior to other single and multiple model-based filters in terms of position and course accuracy, and the model associated with it is insensitive to flight motion types and design parameters. The results of tracking with real flight data also correspond well with those found by tracking with the simulation data.</P>

Cognitive impairment differs between neuromyelitis optica spectrum disorder and multiple sclerosis

Kim, Su-Hyun,Kwak, Kichang,Jeong, In Hye,Hyun, Jae-Won,Jo, Hyo-Jin,Joung, AeRan,Yu, Eun-Seung,Kim, Ji-Hee,Lee, Sang Hyun,Yun, Sooin,Joo, Jungnam,Lee, Dong-kyun,Lee, Jong-Min,Kim, Ho Jin SAGE Publications 2016 Multiple sclerosis journal: clinical and laborator Vol.22 No.14

<P>Conclusion: CI in patients with NMOSD may be not as common as in patients with MS. MS patients exhibited severe impairment, particularly on learning and memory tests, compared with NMOSD patients. Differential prevalence and patterns of CI between NMOSD and MS patients suggest that the two diseases have different mechanisms of brain injury.</P>

Efficient global optimization for S-duct diffuser shape design

Bae, HyoGil,Park, SooHyung,Kwon, JangHyuk SAGE Publications 2013 Proceedings of the Institution of Mechanical Engin Vol.227 No.9

<P>The efficient global optimization method is a global optimization technique based on the stochastic kriging model to efficiently search the global optimum in a design space. Efficient global optimization selects the next sample point in the view of the probability that a global minimum is located. To present the probability, the efficient global optimization method introduces the expected improvement function. The mean and variance at the untried point provided from the kriging model are used to calculate the expected improvement function. Efficient global optimization selects the maximum expected improvement point as the next sample point. After validating the efficient global optimization method by several test functions, we applied it to a diffusing S-duct shape design problem which needs a computationally expensive turbulent computational fluid dynamics analysis. The design objective is to improve the total pressure recovery of the S-duct. The improved S-duct shape was searched globally through the efficient global optimization method. Our results confirmed that the efficient global optimization method can efficiently provide a meaningful engineering result in the S-duct shape design.</P>