• Progress in Superconductivity
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• v.14 no.1
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• pp.11-16
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• 2012

Based on fully self-consistent dynamical mean field theory (DMFT) method, we investigate electronic structure and Fermi surface nesting property of LiFeAs and NaFeAs, focusing on the correlation effect of iron 3d orbital. For LiFeAs, good nesting property by density functional theory (DFT) method is much suppressed by DFT+DMFT method due to the orbital-dependent renormalization magnitude. NaFeAs shows a similar behavior, but a better nesting is obtained than LiFeAs from DFT+DMFT Fermi surfaces. Our result is consistent with the observed superconducting (spin density wave) ground state of LiFeAs (NaFeAs).

• Safety and Health at Work
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• v.6 no.4
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• pp.338-344
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• 2015

Background: The present study aims to investigate job stressors and stress relievers for Korean emotional laborers, specifically focusing on the effects of work conditions and emotional labor properties. Emotional laborers are asked to hide or distort their real emotions in their interaction with clients. They are exposed to high levels of stress in the emotional labor process, which leads to serious mental health risks including burnout, depression, and even suicide impulse. Exploring job stressors and relieving factors would be the first step in seeking alternatives to protect emotional laborers from those mental health risks. Methods: Using the third wave data of Korean Working Conditions Survey, logistic regression analysis was conducted for two purposes: to examine the relations of emotional labor and stress, and to find out job stressors and relievers for emotional laborers. Results: The chances of stress arousal are 3.5 times higher for emotional laborers; emotional laborers experience double risk-burden for stress arousal. In addition to general job stressors, emotional laborers need to bear burdens related to emotional labor properties. The effect of social support at the workplace is not significant for stress relief, unlike common assumptions, whereas subjective satisfaction (wage satisfaction and work-life balance) is proven to have relieving effects on emotional laborers' job stress. Conclusion: From the results, the importance of a balanced understanding of emotional labor for establishing effective policies for emotional laborer protection is stressed.

• Journal of Climate Change Research
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• v.5 no.3
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• pp.257-266
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• 2014

This study aims to understand abnormal climate caused by impacts of climate change and to suggest the direction of urban planning focusing on adaptation to climate change. The study consists of theory consideration and case study(Chicago, Philadelphia, Seattle). As a result, the main impacts of climate change faced by urban areas are heat wave, precipitation, and drought. To prevent these impacts, it is important to prepare methods of urban planning as followings: planning for land use, park and green considering the climate patterns, establishing and managing water resources systems similar to the nature, securing renewable energy resources, and transportation facilities and exterior space with proof against climate. It is especially necessary to introduce infrastructures related to storm water, green roof, shading tree planting, green space, and permeable pavement. Finally, in order to realize urban planning for adaptation to climate change, it is needed to make the detailed and specific goal and strategy for the climate change adaptation plan and to extend the scope from the goals to an action plan, a detailed plan, and a design guideline.

• Journal of Convergence for Information Technology
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• v.9 no.6
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• pp.97-103
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• 2019

This study is to find ways to improve the life satisfaction of people of disability through disability acceptance and self-efficacy. 1,505 out of 4,400 of Penal Survey of Employment for the Disabled 2nd Wave were applied for the study. Regression analysis, descriptive statistics and correlation analysis by SPSS 23.0 were applied. The study show that the disability acceptance had a positive effect on self-efficacy and life satisfaction. Self-efficacy influenced positive effect to life satisfaction and played a mediating role between disability acceptance and life satisfaction. Base on the result, this study made suggestions for necessity to operate rehabilitation and Psychological cognition integral programs and to find and attend the various programs for people of disability.

• Journal of Environmental Science International
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• v.28 no.10
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• pp.831-840
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• 2019

Recently, summer high temperature events caused by climate change and urban heat island phenomenon have become a serious social problem around the world. Urban areas have low albedo and huge heat storage, resulting in higher temperatures and longer lasting characteristics. To effectively consider the urban heat island measures, it is important to quantitatively grasp the impact of urban high temperatures on the society. Until now, the study of urban heat island phenomenon had been carried out focusing only on the effects of urban high temperature on human health (such as heat stroke and sleep disturbance). In this study, we focus on the effect of urban heat island phenomenon on air pollution. In particular, the relationship between high temperature phenomena in urban areas during summer and the concentration of photochemical oxidant is investigated. High concentrations of ozone during summer are confirmed to coincide with a day when the causative substances (NO2,VOCs) are high in urban areas during the early morning hours. Further, it is noted that the night urban heat island intensity is large.. Finally, although the concentration of other air pollutants has been decreasing in the long term, the concentration of photochemical oxidant gradually increases in Daegu.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.36 no.1
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• pp.37-48
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• 2020

Logistics centers, distribution centers, or warehouse facilities increasingly dominate urban and suburban landscapes, their enormous but blank, repetitive facades completely overshadowing adjacent buildings. Mostly ignored by architects, this new building type symbolically represents the arrival of post-anthropocene, or post-urbicene era of architecture, in which an increasing portion of our built environment will not be intended for human occupancy, but rather for use by machines and artificial intelligence. As a new wave of logistics centers are becoming more automated, and more supersized, it is important to deepen architects' understanding of the organizational logic and programming factors that inform the overall design decisions for these facilities. With a particular focus on three case studies--Coupang, E-Mart, and Amazon Fulfillment Centers, this research examines the current trends in automation and expansion of logistics centers, and offers an analysis and forecast for future facilities in South Korea.

• International Journal of Advanced Culture Technology
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• v.11 no.3
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• pp.268-276
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• 2023

Ukiyo-e, a pivotal facet of Japanese art, had a profound impact on Western art during the 19th century, contributing to the emergence of Impressionism and Post-Impressionism. Notably, Katsushika Hokusai's "Great Wave" remains an enduring masterpiece. Ukiyo-e's historical trajectory is intricately linked to the socio-cultural context of its time. Japan's early artistic influences derived from China, evolving through the Nara and Heian periods. Ukiyo-e emerged from the Yamato-e tradition, characterized by its transition from religious themes to secular subjects. Zen Buddhism's influence during the Muromachi Shogunate shifted focus to ink wash painting, which eventually became accessible to the masses. The Azuchi-Momoyama period introduced lavish, colorful works. The Edo Shogunate upheld Kano School for the elite, while folklore painting gained popularity among the commoners, leading to the creation of Ukiyo-e. Ukiyo-e diversified its subjects, including beauty, geisha, sumo, landscapes, and more. The Asakusa district's "Shin-Yoshiwara" added to its vibrant themes. By the late 19th century, Ukiyo-e transcended its roots, encompassing landscapes, wildlife, and beyond. I explore Ukiyo-e's aesthetics and its influence on Impressionism, focusing on "The Three Masters of Ukiyo-e" - Kiyotagawa Komaro, Katsushika Hokusai, and Utagawa Hiroshige.

• Human Ecology Research
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• v.61 no.4
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• pp.615-633
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• 2023

This study aimed to examine the actor and partner effects of marital satisfaction on life satisfaction in middle-aged and older couples via their health behavior and health. The study participants included a total of 2,108 couples, aged 57 and over, from the eighth wave of data from the Korean Longitudinal Study of Ageing (KLoSA). The marital satisfaction, health behavior, health, and life satisfaction of the husbands and wives were measured to conduct the analysis. This analysis was conducted based on the Actor-Partner Interdependence Mediation Model (APIMeM) with the bootstrapping technique being used as the mediating effect. The results indicated that there were significant actor and partner direct and indirect effects when it comes to the relationship between the participants' marital satisfaction and their own life satisfaction, mediated by health behavior and health. However, no significant influences regarding the health of the participants on the life satisfaction of their spouses were found. These results suggest that it is important for middle-aged and older couples to improve their marital relationships in order to promote the health and life satisfaction of both parties. Doing so will help husbands and wives lead healthier lifestyles based on their positive relationships.

• Korean Journal of Optics and Photonics
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• v.35 no.5
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• pp.218-227
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• 2024

The tabletop-scale terahertz (THz) light sources using femtosecond laser pulses are primarily based on spatiotemporal changes in electron charge. This review introduces a new scheme where the spin angular momentum of electrons contributes to THz wave generation. By focusing on laser-induced spin current generation in ferromagnets, we review the outstanding characteristics observed in nanometric ferromagnetic/nonmagnetic thin films, including high power, ultra-broadband, and polarization tunability. Additionally, research on various application technologies is introduced, including the development of devices combining semiconductors, large-area THz devices, and flexible THz devices, all based on nanoscale thin films. Through this, the principle of spintronic THz emission can be understood, contributing the advancement of various application studies utilizing electron spin as a next-generation THz optical device.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.26 no.10
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• pp.851-868
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• 2015

A radio telescope which has been dominantly used for millimeter and submillimeter wave radio astronomy is a cassegrain antenna. A various receivers with specified observing bandwidths are installed on cassegrain antenna so as to carry out to investigate a diverse radio astronomy. A beam guiding system should be required so that a various receiver can be conducted their own observational frequency bands. The beam guiding system based on Gaussian beam transmission theory consists of quasi-optical circuit used such ellipsoidal mirror, dielectric lens and feed horn. In this paper, not only Gaussian beam transformations based on Gaussian beam theory are presented, but also design techniques for quasi-optical circuit are given. By using proposed design techniques, both Gaussian beam quasi-optical circuits to be used for cassegrain antenna and design results are also described. Properties of key focusing elements such ellipsoidal mirror and dielectric lens and feed horn are also discussed. It is expected that beam guiding system to be applied cassegrain antenna could be easily designed by using proposed design techniques.