Hydrothermal and ultrasonic processes were used in this study to synthesize a single-atom Cu anchored on t-BaTiO3. The resulting material effectively employs vibration energy for the piezoelectric (PE) catalytic degradation of pollutants. The phase and microstructure of the sample were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM), and it was found that the sample had a tetragonal perovskite structure with uniform grain size. The nanomaterial achieved a considerable increase in tetracycline degradation rate (approximately 95 % within 7 h) when subjected to mechanical vibration. In contrast, pure BaTiO3 demonstrated a degradation rate of 56.7 %. A significant number of piezoinduced negative charge carriers, electrons, can leak out to the Cu-doped BaTiO3 interface due to Cu’s exceptional conductivity. As a result, a single-atom Cu catalyst can facilitate the separation of these electrons, resulting in synergistic catalysis. By demonstrating a viable approach for improving ultrasonic and PE materials this research highlights the benefits of combining ultrasonic technology and the PE effect.

글로벌 게임시장의 성장에 따라 국내 게임이용자도 손쉽게 다양한 국가에서 접할 수 있게 되 었다. 그리고 이러한 글로벌 경쟁 속에서 현실의 다양한 문화 창의적으로 반영한 게임이 점증 하고 있다. 대표적인 것이 중국의 호요버스가 개발한 해제 월드 형<원심>으로, 해당 콘텐츠는 캐릭터와 공간디자인에 다양한 국가의 문 것이 특징이다. 이때 의상디자인은 캐릭터의 성격과 매력을 효과적으로 이국적인 특색을 드러내는 기호라는 점에서 특히 중요하다. 이에 이 글은 먼저 캐릭터 의상과 의상 기호에 관한 검토하고, <원심>의 문화 활용 전략을 간단히 살펴보았 다. 이후 퍼스의 기호학을 활용해 중국의 문화적 특색을 반<원신> 캐릭터 ‘운근’을 분석하였다. 분석 결과, <원신>의 캐릭터 디자인전략은 중국의 풍부한 문화적 문맥을 중심 코드를 적극적으 로 빌리는 한편, 캐릭터 성을 부각하는 방향으로 의상 구성요소를 변형 시 나타났다. 이후 분 석 결과를 바탕으로 차후 연구를 위한 발전 방향을 제시하였다..

Spent Calgon Filtrasorb activated carbon (SAC) from glycerine deodorization unit was evaluated for the removal of methylene blue (MB). The SAC was used without further modification. The SAC was characterized for BET surface area, pH, pHpzc and FTIR to determine the textural and chemical properties of SAC. The batch adsorption study of MB was carried out under different initial concentrations (5–500 mg/L), pH (2–11) and contact time (0–200 h). The SAC was found to have high BET surface area, pore volume and average pore diameter of 735 m2/g, 0.292 cm3/g and 2.56 nm, respectively. The properties of SAC contributed to high MB adsorption capacity of 283 mg/g. The equilibrium data fitted well with Langmuir model, indicating monolayer adsorption; while the activation energy (Ea) of Dubinin–Radushkevitch (D–R) model is lower than 8 kJ/mol, signifying physisorption. The adsorption kinetics was best illustrated by pseudo-second-order model, while the intraparticle diffusion and Boyd models suggested that film diffusion is the rate-controlling step. These findings showed that Calgon Filtrasorb SAC from glycerine deodorization unit can be potentially reused an adsorbent for the removal of dyes.

In this study, we used activated carbon(AC) as a carbon source, along with zeolite, to prepare spherical carbons using sucrose, starch and phenolic resin(PR) as binder material. The physicochemical characteristics of the three samples(AZ4P, AZ6P and AZ8P) were examined by BET, XRD, SEM, EDX, H2S/NH3 gas adsorption, compressive strength and ignition test techniques. Through comparative analysis of the compressive strength and ignition test results the AZ8P sample was found to have the best hardness and the highest temperature resistance capacity. After activation, the AZ8P sample had the best H2S adsorption capacity, and AZ6P was the most suitable for the adsorption of ammonia.

Fifty-four biological characters were used for quantitative classification of sorghum and sudangrass and their relationship. Discriminant analysis of all 240 individuals of 48 accessions suggested that 100% of originally grouped cases were correctly classified. Analysis of variance results showed that the differences among 48 accessions in characters were significant at the 0.01 level. Cluster analysis showed that the 48 accessions were obviously divided into two clusters by a Euclidean distance of 17.46 as the classification standards, i.e. the genus maize and genus sorghum. The 48 accessions were divided into four clusters by a Euclidean distance of 9.86, i.e. Sorghum-Sudangrass, Sorghum related species (S. propinquum and S. halepense), Zea mexicana and Z. mays. All accessions were divided into five clusters by a Euclidean distance of 8.91, namely group Ⅰ (Sudangrass-Chinese sorghum), group Ⅱ (Non-Chinese sorghum), group Ⅲ (Sorghum related species), group Ⅳ (Zea mexicana), and group Ⅴ (Z mays).

The processes of P/M affect the properties of sintered gears. The different techniques of P/M lead to the different properties of sintered gears. This paper summarizes new progress in powder metallurgy for sintered gears. These progresses include warm compaction, high velocity compaction, sinter hardening, high temperature sintering, infiltration, CNC powder press and surface densification etc.

To understand the effect of powder characteristics on the thermal debinding behavior, PIM parts produced with powders with different particle sizes and particle shapes were examined to determine their weight losses during thermal debinding. The results show that the average diameter of the pore channel in the compact increased when the temperature increased and when coarse powders were used. However, the weight loss rates did not increase proportionally with the pore size. This suggests that the different powders that are frequently used in PIM parts do not affect the thermal debinding rate significantly. This is because the pore size is much larger than the mean free path of the decomposed gas molecules. Thus, the diffusion rates of the gases are not rate-controlling in thermal debinding. The controlling mechanism of the thermal debinding rate is the decomposition of the backbone binder in the PIM parts.