2,261 research outputs found
The action spectrum of phototactic responses of Forcipomyia (Lasiohelea) taiwana (Shiraki) (Diptera: Ceratopogonidae).
No full textEffect of heat treatment temperature on microstructure and mechanical and tribological properties of cold sprayed Ti-6Al-4V coatings
No full textIn this study, Ti-6Al-4V (Ti-64) coatings were prepared on commercial Ti-64 substrates via a high-pressure cold spray process. The coatings were heat treated at different temperatures of 400–1000°C to investigate the effect of heat treatment temperature on their microstructure and mechanical and tribological properties. The increased heat treatment temperature from 400 to 600°C promoted diffusion between sprayed Ti-64 particles. Recrystallization of the sprayed particles was found at the heat treatment temperature of 800°C and grain growth was found in the microstructure of the coating heat treated at 1000°C. The highest and lowest hardnesses of the heat-treated coatings were found at heat treatment temperatures of 400 and 800°C, respectively. Therefore, the lowest and highest specific wear rates of the coatings were consistently found at 400 and 800°C due to their highest and lowest abrasive wear resistances associated with their highest and lowest surface hardnesses, respectively. The coating heat treated at 400°C showed the highest surface hardness of 470.1 Hv and lowest specific wear rate of 69.6 × 10−14 m3/Nm. It could be concluded that the microstructure and mechanical and tribological properties of the Ti-64 coatings were significantly influenced by heat treatment temperature
FIGURE 3 in Rediscovery of Styrax buchananii and S. chrysocarpus, with supplemental descriptions adding fruit and floral characters, respectively
No full textFIGURE 3. Styrax buchananii from Yingjiang County, Yunnan, China. A. Habit, the arrow shows S. buchananii. B. Flowering branchlet. C. Fruiting branchlets. A and C from R. Zhang et al. zrr14 (JXAU), B from W.Y. Zhao & F. Ye zwy-1606 (JXAU). Photographs A and C by R. Zhang, and B by W.Y. Zhao.Published as part of Zhang, Rui, Zhao, Wan-Yi, Liu, Yu-Lin, Fan, Yu & Tang, Ming, 2021, Rediscovery of Styrax buchananii and S. chrysocarpus, with supplemental descriptions adding fruit and floral characters, respectively, pp. 173-182 in Phytotaxa 479 (2) on page 176, DOI: 10.11646/phytotaxa.479.2.3, http://zenodo.org/record/541376
Beyond Lesson Studies and Design Experiments: Using theoretical tools in practice and finding out how they work
Full text linkThis paper aims to illustrate how fruitful insights into the link between school teaching practice and student learning outcomes can be theoretically grounded by the variation theory from the field of phenomenography; and from this framework demonstrate how a 'pedagogy of awareness' can be implemented in the classroom. In this study, five teachers and 162 students at Primary Four level of school education in Hong Kong participated and the practice of the 'learning study' was adopted. By comparing the results of pre- and posttests, a significant gain was observed in the students learning outcomes.
Factors that influence physicians in providing palliative care in rural communities in Taiwan.
No full textEffects of working gas on wear and corrosion resistances of cold sprayed Ti-6Al-4V coatings
No full textIn this study, the wear and corrosion resistances of cold sprayed Ti-6Al-4V (Ti64) coatings on commercial Ti64 substrates using nitrogen (N2) and helium (He) working gases were systematically investigated. The denser microstructure of the Ti64 coating with a lower porosity level was achieved with He working gas. Therefore, the Ti64 coating deposited with He working gas had the higher hardness than the one deposited with N2 working gas. The Ti64 coating deposited with He working gas had higher adhesion strength than the one deposited with N2 working gas. The tribological results showed that the use of He working gas during the cold spraying gave rise to the higher abrasive wear resistance of the Ti64 coating via its higher hardness. In addition, the Ti64 coating deposited with He working gas did not show any fatigue micro-cracks on its wear track during the prolonged sliding probably due to the relatively strong bonding between sprayed Ti64 particles. It was found that the Ti64 coating deposited with He working gas had lower anodic dissolution in 0.6 M NaCl solution compared to the one deposited with N2 working gas as a result of its lower porosity level
Fusicolla guangxiensis Z. Q. Zeng, C. Liu & W. Y. Zhuang 2022, sp. nov.
No full textFusicolla guangxiensis Z.Q. Zeng, C. Liu & W.Y. Zhuang, sp. nov.FIGURE 3 Fungal Names: FN570866 Etymology:—Referring to the type locality of the fungus. Typification:— China, Guangxi autonomous region, Fangchenggang City, Shangsi County, Shiwandashan National Forest Park, 21°54′40′′ N, 107°55′24′′ E, on rotten twig, 10 December 2019, Z.Q. Zeng & H.D. Zheng, 12537 (CGMCC 3.20679). Description: —Colonies on PDA reaching 20−22 mm diam. after 2 wk at 25 °C, slimy appearance due to abundant sporulation on medium surface. Orange in center, pale luteous at margin. Colonies on MEA reaching 34−37 mm diam. after 2 wk at 25 °C, slimy surface, orange to pale yellow. Colonies on SNA reaching 32−34 mm diam. after 2 wk at 25 °C, aerial mycelium rare to absent, light yellow. Colonies on OA reaching 47−50 mm diam. after 2 wk at 25 °C, aerial absent with slimy appearance due to abundant sporulation on medium surface, pale yellow to buff. Asexual stage fusarium-like. Conidiophores arising directly from somatic hyphae, simple or rarely branched, monochasial, straight, hyaline, smooth-walled, aseptate or with basal septum. Macroconidia on PDA long-fusiform, somewhat curved falcate, acute at both ends, a few slightly hooked at both ends, hyaline, smooth, (0–)1(–3)-septate, (12–)15–29 × 1.3–2.3 µm (av. 22.13 × 1.88 µm) (n = 30). Macroconidia on OA, 0–3(–4)-septate, (12–)31–49 × 2.2–3.3 µm (av. 41.6 × 2.9 µm) (n = 30). Microconidia absent. Sexual stage not observed.Published as part of Liu, Chang, Zhuang, Wen-Ying, Yu, Zhi-He & Zeng, Zhao-Qing, 2022, Two new species of Fusicolla (Hypocreales) from China, pp. 165-174 in Phytotaxa 536 (2) on pages 169-170, DOI: 10.11646/phytotaxa.536.2.5, http://zenodo.org/record/625760
Highly efficient blue OLEDs using ter(9,9-diarylfluorene)s with ambipolar carrier transport properties
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