청소년기는 생리적, 정서적, 사회적으로 변화를 겪는 매우 불안정한 시기이다. 이때에 게임은 청소년의 스트레스를 줄여주고, 교우관계를 돈독하게 해줄 수 있는 유용한 매체이다. 그러나 게임의 과도한 이용은 오히려 청소년들의 삶을 피폐하게 만든다. 따라서 본 연구에서는 아버지의 개방적 의사소통이 중학생 자녀의 게임 과몰입에 미치는 영향에서 게임이용특성 중 시간, 기간, 지속정도가 어떠한 매개적 역할을 하는지 확인했다. 본 연구에서는 수집된 자료로 아버지의 개방적 의사소통이 게임이용특성을 매개하여 게임 과몰입에 미치는 영향을 살펴보고자 병렬매개효과를 확인하였다. 이를 위해 SPSS WIN 22.0 프로그램과 Process Macro 3.4 매크로를 사용하여 다음과 같은 분석을 진행했다. 이에 대한 연구결과는 다음과 같다. 첫째, 아버지의 개방적 의사소통은 중학생 자녀의 게임 과몰입에 부적 영향을 미쳤다. 둘째, 아버지의 개방적 의사소통은 중학생 자녀의 평일게임시간과 게임지속시간에 부적 영향을 미쳤다. 셋째, 중학생 자녀의 평일게임시간, 게임연수, 게임지속시간은 게임 과몰입에 부적 영향을 미쳤다. 마지막으로 아버지의 개방적 의사소통과 중학생 자녀의 게임 과몰입의 관계에서 평일게임시간, 게임지속시간은 부분매개효과가 있었다. 이를 통해 중학생의 게임 과몰입을 낮추기 위해서는 개인적 노력뿐만 아니라 가정에서 아버지의 역할이 중요함을 알 수 있다.

Increasing demand for fossil fuels is associated with massive atmospheric CO2 levels. Considering that numerous studies have been published with CO2 capturing techniques, utilizing techniques are yet in early stage with financial or technical issues. As a part of chemical conversion in CO2 utilization, this paper investigated the performance of a CO2 and H2O mixture (CHM) onto activated carbon fibers (ACF) for surface modification. CHM-treated ACF samples were prepared at a pressure of 20 bar with 100 °C of water vapor and 750 μL of CO2 for 1 h through the gas-phase, and labeled as C-ACF850. For the control sample, N-ACF850 was also prepared by the impregnation of nitric acid. Physiochemical analyses revealed that the overall characteristics of C-ACF850 lay between ACF850 and N-ACF850. C-ACF850 experienced minimized surface area decrement (21.92% better than N-ACF850), but increased surface functional groups (50.47% better than ACF850). C-ACF850 also showed preferable adsorption efficiency on selected metals, in which case both physical and chemical properties of adsorbent affect the overall adsorption efficiency. In this regard, a novel applicability of CHM may present an appealing alternative to traditionally used strong acids.

Fibrous adsorbents, such as activated carbon fibers (ACF) have acknowledged advantages of rapid adsorption rate and ease of modification compared with granular and powdered adsorbents. Based on the surface modification of lyocell-based ACF, we observed different surface characteristics of ACF samples with variation in the mixing ratio and impregnation time of H3PO4, NaCl, and KMnO4 solution. For an engineering application, we also explored the adsorption characteristics of thusproduced ACF samples onto volatile organic compounds (VOCs). Isothermal adsorption experiments were performed using toluene and benzene as adsorbates. Results indicate that both physical and chemical surface properties have an effect on the adsorption of volatile organic compounds (VOCs).

Chlorella gloriosa (Chlorellaceae, Trebouxiophyceae) was isolated from seawater off the coast of the Dokdo Islands in Korea. An axenic culture was established using the streak-plate method on f/2 agar media supplemented with antibiotics, allowing identification of the isolate by morphological, molecular, and physiological analyses. The morphological characteristics observed by light and electron microscopy revealed typical morphologies of C. gloriosa species. The molecular phylogenetic inference drawn from the small-subunit 18S rRNA sequence verified that the microalgal strain belongs to C. gloriosa. Additionally, gas chromatography-mass spectrometry analysis showed that the isolate was rich in nutritionally important omega-3 and -6 polyunsaturated fatty acids and high-performance liquid chromatography analysis revealed that the high-value antioxidants lutein and violaxanthin were biosynthesized as accessory pigments by this microalga, with arabinose, galactose, and glucose as the major monosaccharides. Therefore, in this study, a Korean marine C. gloriosa species was discovered, characterized, and described, and subsequently added to the national culture collection.

Since the appearance of smartphones, the smartphone market has been in fierce completion by new technologies and marketing trends. The smartphone market is now somewhat saturated, and the manufacturers are trying to improve their position in the market through the repurchase of existing customers and the influx of competitors. At the same time, customers have their own purchasing criteria for smartphones. Therefore, manufacturers need to determine new technology and marketing trends based on customer purchasing trends and usage characteristics. The aim of this study is to analyze the quality attributes of smartphones. We conducted a survey on 220 respondents, and divided the respondents into several groups by purchasing trends and usage characteristic through cluster analysis. The groups are analyzed and compared based on the Kano model for the quality attributes of smartphone. The analysis result are as follows. Firstly, purchasing trends divide responders into groups that prefers high-end premium smartphones and those that take into account practicality in terms of purchasing trends. Secondly, usage characteristic divide responders into three groups: those with clear usage pattern, those who prefer ease of use, and the rest, and we find out that those with clear usage pattern are important customer in viral marketing. Lastly, Kano analysis is revealed the ‘Slow/ hi-speed camera’, ‘Private mode’, ‘Widget’, ‘Health care’ are attractive quality attributes.

이 논문은 조이스가 히니에게 끼친 영향을 그들의 공통점을 근거로 고찰한다. 그런데 대체로 다음과 같은 공통점 때문에 히니는 조이스의 영향을 받았다고 판단 할 수 있다:그 첫 번째로는 두 작가 모두 편협 된 가톨릭 국수주의로부터 자유 로운 예술을 추구했고 두 번째로는 아일랜드의 마비되고 비참한 현실을 노출시켜 개선하고자 사실주의 기법을 사용했다. 세 번째 공통점은 게일어 소멸에서 오는 자신들의 언어에 대한 결핍감 때문에 아일랜드 경험을 소재로 삼았고 영어를 토착무기로 사용하기 위해 영어구사에 있어 장인의 위치에 도달했다는 점이다. 그리고 마지막으로 간과해서는 안 될 유산은 히니 역시 조이스처럼 아일랜드의 새로운 양심을 창조하려 했다는 점이다. 결론적으로 히니는 종교나 정치로부터 자유로운 예술 추구와 개선의지를 특징으로 하는 조이스의 모더니즘정신을 상속받았다고 평가된다.

In this study, we investigate the effect of Al/N source ratios and growth rates on the growth and structural properties of AlN films on c-plane sapphires by plasma-assisted molecular beam epitaxy. Both growth rates and Al/N ratios affect crystal qualities of AlN films. The full width at half maximum (FWHM) values of (1015) X-ray rocking curves (XRCs) change from 0.22 to 0.31° with changing of the Al/N ratios, but the curves of (0002) XRCs change from 0.04 to 0.45° with changing of the Al/N ratios. This means that structural deformation due to dislocations is slightly affected by the Al/N ratio in the (1015) XRCs but affected strongly for the (0002) XRCs. From the viewpoint of growth rate, the AlN films with high growth rate (HGR) show better crystal quality than the low growth rate (LGR) films overall, as shown by the FWHM values of the (0002) and (1015) XRCs. Based on cross-sectional transmission electron microscope observation, the HGR sample with an Al/N ratio of 3.1 shows more edge dislocations than there are screw and mixed dislocations in the LGR sample with Al/N ratio of 3.5.