The oxygen-rich activated carbon (AC) was facilely developed using petroleum coke as a raw material by KOH activation under the rapid heating rate. The porosity and surface chemistry of ACs prepared under different heating rates were characterized and their adsorption properties for methylene blue (MB) were investigated. The results showed that the AC5 prepared under the heating rate of 5 °C min−1 had the highest surface area compared with the AC10, AC15 or AC20, while the AC20 prepared under the heating rate of 20 °C min−1 consisted of the highest oxygen content and most –OH functional group compares with the other ACs. These indicated that rapid heating rate was against the formation of more developed porosity, however, it was beneficial to producing more oxygen functional groups. As to MB adsorption, AC15 exhibited the maximum adsorption capacity for MB of 884 mg g−1 due to high surface area of 2803 m2 g−1 and high oxygen content of 23.27%. Moreover, despite the fact that AC20 had much lower surface area than the AC5, the AC20 showed higher MB adsorption capacity than the AC5. This was because the AC20 has the highest content of –OH, which was a positive impetus for MB adsorption. Therefore, rapid heating rate was an effective and simple approach to preparing the oxygen-rich ACs for improving the adsorption capacity of MB.

세계적인 침입해충 담배가루이 (Bemisia tabaci Gennadius)의 한국 계통과 중국 계통의 유연관계를 알아보기 위하여 2019년에 채집한 두 계통들의 biotype 분포, 살충제 반응, 바이러스 보독율을 조사하고 차이를 분석하였다. 미토콘드리아 COI 유전자 서열을 이용하여 집단 분석한 결과 국내는 모든 지역계통에서 Q biotype만 발견되었으며, 중국은 B biotype (14.3%)과 Q biotype (85.7%)이 동시에 발견되었다. 담배가루이 Q biotype의 haplotpye 구성도 중국은 모두 Q1 그룹만 관찰되었고 Q1H1 (79.8%), Q1H2 (20.2%)로 구성되어 있었으며, 한국은 Q1이 우세한 가운 데 Q2도 관찰되었으며 Q1 그룹의 구성도 Q1H1 (1.7%), Q1H2 (97.5%)로 중국과는 크게 달랐다. 15종 살충제에 대한 약제반응은 국내 계통은 일부 약제를 제외하고 대부분 약제에서 충분한 살충력 (mortality≥80%)을 보여주었으나 중국 계통은 40% 이하의 살충력을 보인 약제들이 다수 있었으며 한국보다는 높은 저항성을 갖고 있었다. 토마토 황화잎말림바이러스 (TYLCV)의 보독율은 국내 계통에서는 발견되지 않았으며 중국의 경우 0∼60% (평균 21.4%) 가 발견되었다. 따라서 한국와 중국의 담배가루이 계통 간에는 유전적 조성과 살충제 반응, 바이러스 보독율에 있어서 큰 차이를 보여주었으며 양국의 담배가루이가 서로 다른 유입 패턴을 갖고 있음을 알 수 있었다.

This paper presents a review of the research literature on overweight and obesity problem by incorporating medical, economic and marketing research perspectives to shed lights on the growing problem across all ages and socioeconomic strata. We draw upon multidisciplinary research literature to gain a better understanding of the major causes as well as proposed remedies. Some are more likely to be more successful in addressing the difficult problem. Our conclusion is that as the issues are quite complex, no one single solution will work. It probably will require all stakeholders to be involved in order to come up with a reasonable solution to address this difficult problem. More researches need to be conducted, especially research involving cross country comparison to provide greater insights since this problem has become a global problem and not just confined to the developed economies in the West.

In this paper, graphene-coated Al powders prepared by in situ reduction method were directly used for cold spraying, obtaining a graphene-reinforced Al matrix composite coating with more compact structure and better performance. Cross-sectional analysis revealed that compared with the pure Al powders, the graphene-coated Al powders were more severely deformed, and the resulting coating was denser and its porosity was reduced by over 80%. The hardness of the graphene-coated Al coating was increased by 40%, and its brine immersion time was prolonged by nearly three times. However, the graphene increases the pitting sensitivity of the Al coating; so, the enhanced corrosion resistance of the graphene-coated Al coating is mainly attributed to the improvement of its structure densification.

홍콩에는 예부터 지금까지 파키스탄, 인도, 네팔 등에서 온 이민들을 포함하여, 비중국어권 아동들이 적지 않다. 평등교육의 이념을 표방하는 홍콩평등기회위원회(香港平等機會委員會)는 비중국어권 학습자들이 중국어권 학습자들과 같은 학교에서 학습하기를 건의하여 그들이 최대한 빠른 시일 내에 홍콩 사회로 융화되게 하려 하였다. 이로 인해, 비중국어권 아동들은 홍콩 현지의 일반 유치원을 다니게 되었는데, 홍콩의 교육 관할 당국도 적지 않은 자원을 투입하여 이들이 현지 교육과정에 적응할 수 있도록 협조하였으나, 그 효과를 즉각적으로 확인할 수는 없었다. 그 중 가장 큰 문제는 학습의 차이를 처리하는 것이었다. 비중국어권 아동들의 중국어 실력은 모국어 수준에 미치지는 못했다. 이들이 중국어권 아동들과 함께 중국어 수업에 참여할 때 적잖은 어려움이 발행했다. 또한, 비중국어권 아동들의 성장 배경도 각기 달랐다. 신이민자 가정의 아동도 있고, 현지에서 출생한 소수 민족 아동도 있어, 이러한 학습자 사이의 중국어 수준의 차이도 존재했다. 이밖에도 소수민족과 홍콩의 문화적 차이 또한 매우 커서 모든 교사와 아동은 ‘학습’과 ‘교수’ 두 측면에서 모두 여러 가지 차이로 인해 발생하는 문제들을 처리해야 했다. 이처럼 비중국어권 학습자들이 홍콩에서 중국어를 배우는 것은 매우 쉽지 않았다. 상술한 문제들을 해결하기 위해서 경마회 자선기금 및 다섯 단체의 공영교육 사회복지기구는 ｢경마회의 재밌는 중국어 배우기(賽馬會(有)友趣學中文)｣ 라는 프로젝트를 추진하여, 중국어를 모국어로 갖지 않는 학습자들이 효과적으로 중국어 학습 하여 빠르게 사회에 융화되도록 도왔다. 본 프로 젝트는 수준별 교육과정, 수준별 교재, 수준별 학습법, 수준별 교구, 수준별 평가와 다층적 교학법을 설계하고 지원하여 학습 차이에서 생기는 어려움을 해결하는 데 도움을 주었다. 본고에서는 연구 이론과 설계, 데이터 수집 및 연구 결과를 상세히 서술하고, 효과적인 사례에 대해 상세하게 서술하려고 한다. 이러한 연구 성과는 세계 각지에 광범위하게 적용될 수 있을 것이다.

This article explores the territorial extension of the EU environmental law and how the EU uses its market powers to become global regulatory initiatives in the context of environmental protection. The legitimacy and practical influence of the global reach of the EU environmental law is first to be discussed. Taiwan, as a significant trade partner to the EU and also a critical exporting-oriented industrial entity in the world, has been heavily influenced by the EU environmental law development for the sake of gaining market access to the EU. In this regard, this article provides an overview of the EU environmental law. This article will provide a case study on the territorial effects of the EU environmental law on Taiwan and the responsive actions taken by the government and industries in Taiwan. This article recognizes the importance of the EU to achieve legitimate global values in the context of global environmental protection.

This paper examined farmers’ perceptions and preferences for improved varietal traits in the Wenchi and Offinso North Municipalities of Ghana. Data from 306 randomly selected tomato farmers were analyzed using perception indices, Kendall’s Coefficient of concordance and the Poisson regression model. The results show that tomato farmers are willing to adopt an improved variety with long shelf life, good fruit quality and large fruit size. The study further indicates that tomato farmers lack requisite skills in pest and disease management. The number of varietal attributes preferred by farmers was positively influenced by sex of farmer, education, experience in tomato cultivation, household size, access to credit, FBO membership, extension contacts farm size and off-farm income. These factors and attributes need to be carefully considered by breeders and policy makers in the development of an improved tomato variety to enhance its uptake. The major constraints identified in tomato production include limited access to capital followed by low commodity prices coupled with low demand with the least constraint being access to tractors for land preparation. The potential of adoption of improved tomato varieties in Ghana will be augmented through paragenetic measures towards addressing these constraints.

최근 중국을 비롯하여 전세계적으로 모바일 게임의 사용자 수와 시장 규모는 지속적으로 확대되고 있다. 성공적인 모바일 게임 특성은 무엇이며 어떤 요소가 사용자에게 영향을 미치는지를 살펴보기 위해 현재 세계 최대 규모의 게임 시장인 중국 모바일 게임의 대표적 특성을 분석하고 이용자가 게임의 선택과 지속적인 이용에 영향을 미치는 중용한 원인을 찾아봤다. 특히, 게임 방송의 영향력을 감안하여 오피니언 리더로서의 게임 BJ 가 사람들의 게임 선택과 지속적인 이용에 어떠한 영향을 미치는지도 함께 살펴보았다. 기술수용모델(TAM, Technology Acceptance Model)에 기반하여 모바일 게임의 특성과 오피니언 리더에 대한 인식의 외적 변수가 게이머 인식(지각된 유용성, 지각된 용이성, 지각된 오락성)에 미치는 영향을 통해 모바일 게임에 대한 태도와 지속적인 이용 의도를 예측하는 모델을 구축하고, 이를 검증하기 위하여 346 명의 게이머를 대상으로 설문 조사를 실시하였다. 분석 결과, 모바일 특성, 특시 상호작용성과 비용 저렴성, 시공간 편의성이 모바일 게임 이용자의 인식에 큰 영향을 미치는 것으로 나타났으며, 오피니언 리더에 대한 인식이 지각된 오락성에 긍정적인 효과를 보였다. 지각된 오락성과 지각된 유용성은 모바일 게임 태도에 유의한 효과를 보였으며, 게임 태도는 지속적 이용 의도를 유의하게 예측하는 결과를 나타냈다.

Carbonaceous materials are considered as potential adsorbents for organic dyes due to their unique structures which provide high aspect ratios, hydrophobic property, large efficient surface area, and easy surface modification. In this work, graphene nanoribbons (GNRs) were prepared by atomic hydrogen-induced treatment of single-walled carbon nanotube (SWCNTs), which inspire the idea of cutting and unzipping the SWCNTs carpets with the modified in molecules prevent because of the unfolding of the side-walls. The unfolded spaces and uniform vertical arrangement not only enhance the active surface area, but also promote the electrostatic and π–π interactions between dyes and GNRs. The improved adsorption capacity of GNRs beyond original SWCNTs can be determined by the adsorption kinetics and isotherm, which are evaluated through adsorption batch experiments of the typical cationic methylene blue (MB) and anionic orange II (OII) dye, respectively. It is shown that the adsorption kinetics follow a pseudo second-order model while the adsorption isotherm could be determined by Langmuir model. The results reveal that the maximum adsorption capacities of GNRs for MB and OII are 280 and 265 mg/g, respectively. The GNRs present the highly efficient, cost effective, and environmental friendly properties for the commercial applications of wastewater treatment.

Since its accession to the WTO in 2001, China has been involved in 21 cases as complainant, 44 as respondent, and 179 as a third party. However, China-related cases have not overburdened the WTO dispute settlement system. Instead, China has assisted in the development of international trade law through the creative interpretations of different provisions achieved in the WTO dispute settlement proceedings. This article seeks to provide an overview of China’s participation in the WTO dispute settlement mechanism and contribution to the rules over the past decade. In doing so, the article not only highlights the jurisprudential and doctrinal contributions of some of the critical disputes, but also examines the role of various interest groups and stakeholders in shaping China’s dispute settlement activity. Overall, the article provides an overview of China’s WTO dispute settlement activities and its role in assisting the development of international trade law.

As people's income rises dramatically, people's happiness seems not as high as expected. In fact, there are two different arguments about the relationship between income level and happiness. The focus of the debate is whether the correlation between income and probability of happiness is positive or negative. Therefore, we hypothesizes that the relationship between income and probability of happiness presents an inverted U-shaped curve. Then, this paper sets China as an example to explore the effect of income on happiness. The data from the Chinese General Social Survey (CGSS) in 2015 is employed to conduct empirical analyses under the Probit model and the Zero-Inflation-Passion model. The empirical findings indicate that the effect of income on happiness presents an inverted U-shaped curve and significantly in statistic. Meanwhile, spouse’s income, educational level, marriage time and house property have a positive and significant effect on happiness.Conversely, age and local living standards have a negative and significant effect on happiness. Unfortunately, even though registered residence and children have a negative effect on happiness, they do not get through the significant test. In order to ensure the robustness of our empirical results, we test the robustness of the above empirical results by adjusting the sample size. The results of robustness test verify that our empirical results are robust. Moreover, this paper also makes a small contribution to the current literature with a sample from China.

Commercial ultra-high-strength PAN-based carbon fibers (T1000G) were heat-treated at the temperature range of 2300– 2600 °C under a constant stretching of 600 cN. After continuous high-temperature graphitization treatment, microstructures, mechanical properties and thermal stability of the carbon fibers were investigated. The results show that the T1000G carbon fibers present the similar round shape with a smooth surface before and after graphitization, indicating the carbon fibers are fabricated by dry–wet spinning. In comparison, the commercial high-strength and high-modulus PAN-based carbon fibers (M40JB and M55JB) present elliptical shapes with ridges and grooves on the surface, indicating the carbon fibers are fabricated by wet spinning. After graphitization treatment from 2300 to 2600 °C under a constant stretching of 600 cN, the Young’s modulus of the T1000G carbon fibers increases from about 436 to 484 GPa, and their tensile strength decreases from about 5.26 to 4.45 GPa. The increase in Young’s modulus of the graphitized T1000G carbon fibers is attributed to the increase in the crystallite sizes and the preferred orientation of graphite crystallites along the fiber longitudinal direction under a constant stretching condition. In comparison with the M40JB and the M55JB carbon fibers, the graphitized T1000G carbon fibers are easier to be oxidized, which can be contributed to the formation of more micropores and defects during the graphitization process, thus leading to the decrease in the tensile strength.