210,649 research outputs found
Lun yu zhu shu jie jing: [20 juan]. v.133
No full text何晏集解 ; 邢昺疏.綫裝.框17.9 x 12.5 公分, 9行21字, 小字雙行同, 白口, 無魚尾, 左右雙邊, 版心下刻"汲古閣".Xian zhuang.Kuang 17.9 x 12.5 gong fen, 9 hang 21 zi, xiao zi shuang hang tong, bai kou, wu yu wei, zuo you shuang bian, ban xin xia ke "Ji gu ge".He Yan ji jie ; Xing Bing shu
Mileewa digitata Yu, He & Yang 2021
No full text12. Mileewa digitata Yu, He & Yang, 2021 Mileewa digitata Yu, He & Yang, 2021: 436. Type-locality. China (Xizang). Distribution. China (Xizang).Published as part of He, Hong-Li, Yan, Bin, Yang, Mao-Fa & Webb, M. D., 2021, Four new species of Mileewini leafhoppers (Hemiptera: Cicadellidae: Mileewinae) from China, with a checklist to Chinese species, pp. 521-540 in Zootaxa 4949 (3) on page 533, DOI: 10.11646/zootaxa.4949.3.5, http://zenodo.org/record/464062
Mileewa furcata Yu, He & Yang 2021
No full text17. Mileewa furcata Yu, He & Yang, 2021 Mileewa furcata Yu, He & Yang, 2021: 438. Type-locality. China (Xizang). Distribution. China (Xizang).Published as part of He, Hong-Li, Yan, Bin, Yang, Mao-Fa & Webb, M. D., 2021, Four new species of Mileewini leafhoppers (Hemiptera: Cicadellidae: Mileewinae) from China, with a checklist to Chinese species, pp. 521-540 in Zootaxa 4949 (3) on page 533, DOI: 10.11646/zootaxa.4949.3.5, http://zenodo.org/record/464062
Mileewa nigricincta Yu, He & Yang 2021
No full text36. Mileewa nigricincta Yu, He & Yang, 2021 Mileewa nigricincta Yu, He & Yang, 2021: 442. Type-locality. China (Xizang, Yunnan). Distribution. China (Xizang, Yunnan).Published as part of He, Hong-Li, Yan, Bin, Yang, Mao-Fa & Webb, M. D., 2021, Four new species of Mileewini leafhoppers (Hemiptera: Cicadellidae: Mileewinae) from China, with a checklist to Chinese species, pp. 521-540 in Zootaxa 4949 (3) on page 535, DOI: 10.11646/zootaxa.4949.3.5, http://zenodo.org/record/464062
Qidan yu he Liao dai Han yu ji qi jie chu yan jiu
No full text"Qi dan yu he liao dai han yu ji qi jie chu yan jiu" ben shu li yong qi dan yu wen ben he han yu xiang guan wen ben dui qi dan yu he liao dai han yu zuo zong he yan jiu,xi tong ti qu qi dan wen zi dan wei he han yu,Menggu yu yu yan dan wei de dui ying,bing zong he gen ju wen ben fen bu,shi dai fen bu he han yu fang yan yu yin te zheng wei ju ti de dui ying xun zhao xian zhi tiao jian.ran hou zai ci ji chu shang tui qiu liao dai han yu yin xi he qi dan yu de ge zhong xin xi,bing jin yi bu gui na qi dan yu he han yu xiang hu pi pei de gui l
Atomic Insights into Hydrogen-Grain Boundary Interactions
No full textDerived from the most abundant element in the universe, hydrogen is the smallest element and, at the same time, a clean, mobile, and efficient energy carrier. Nowadays, hydrogen is regarded as the fuel of future and could help the world transform into a zero-emissions scenario. However, the popularity of hydrogen-based energy economy has also put the problems associated with hydrogen storage and transport to the forefront. Hydrogen embrittlement (HE), the phenomenon where dissolved hydrogen in metals causes dramatic degradation of mechanical properties leading to sudden and catastrophic failure, was first observed in 1875. However, even after one-century research, the fundamental mechanisms of HE are still in the dark forest mainly due to the lacking of effective methodology for tracking hydrogen experimentally. In this thesis, the HE phenomenon is studied in a substituted way, by using atomistic simulations, to get a comprehensive understanding of the nanoscale mechanism.
Essentially, HE is all things about the interactions between hydrogen atoms and multiple types of microstructures in material, including vacancies, dislocations, grain boundaries (GBs) and crack tips. Of them, GB is the interface separating differently oriented crystallites and plays a central role in deformation and fracture mechanisms. In polycrystalline materials, the HE is often accompanied by a transition from transgranular to intergranular fracture. However, the nanoscale interactions between hydrogen and GB largely remain illusive. And there is a large knowledge gap in the connection between the microscale hydrogen-GB interactions and macroscale observed fracture transition. Starting from this, uniaxial straining is applied to bi-crystalline Ni with a Σ5(210)[001] GB and a transgranular to intergranular fracture transition facilitated by hydrogen is directly elucidated by atomistic modeling. Hydrogen is found to form a local atmosphere in the vicinity of GB, which induces a local stress concentration and inhibits the subsequent stress relaxation at the GB during deformation. It is this local stress concentration that promotes earlier dislocation emission and generation of additional vacancies that ultimately facilitate nanovoiding. The nucleation and growth of nanovoids finally lead to intergranular fracture at the GB, in contrast to the transgranular fracture of hydrogen-free sample. This hydrogen-controlled plasticity mechanism provides a rationale for macroscale fracture transition.
To further validate the universality of this mechanism under various conditions and quantify the hydrogen-induced fracture transition process, uniaxial straining is applied to Ni Σ5(210)[001] and Σ9(1-10)[22-1] GBs with various hydrogen concentrations and temperatures based on a large statistical repetition. Without hydrogen, vacancy generation at GB is limited and transgranular fracture mode dominates. When charged, hydrogen as a booster can enhance strain-induced vacancy generation by up to ten times. This leads to the superabundant vacancy stockpiling at the GB, which agglomerates and nucleates intergranular nanovoids. While hydrogen tends to persistently enhance vacancy concentration, temperature plays an intriguing dual role as either an enhancer or an inhibitor for vacancy stockpiling. These results show a good agreement with positron annihilation spectroscopy experiments. Importantly, an S-shaped quantitative correlation between the proportion of intergranular fracture and vacancy concentration was for the first time derived, highlighting the existence of a critical vacancy concentration, beyond which fracture mode will be completely intergranular.
Besides GB fracture, hydrogen could also influence the migration behavior of GBs. The effect of solute hydrogen on shear-coupled GB migration is investigated with the dislocation-array type Σ25(430)[001] GB and a dual role of hydrogen on GB mobility is unraveled. In the low temperature and high loading rate regime, where hydrogen diffusion is substantially slower than GB motion, GB breaks away from the hydrogen atmosphere and transforms into a new stable phase with highly enhanced mobility. In the reverse regime, hydrogen atoms move along with GB, exerting a drag force on GB and decreasing its mobility. This helps to understand the coexistence of hydrogen hardening and softening in experiments.
Finally, we make an attempt to extend the results in bicrystal to polycrystal model. The trapping and diffusion of hydrogen in polycrystal was analyzed by elucidating the hydrogen-GB segregation spectrum. The spectrum shows three peaks corresponding to GB core sites and hybrid GB surface-octahedron/ tetrahedron sites, respectively. The low migration energy inside GB core and high energy barrier between different types of sites indicate the coexistence of short-circuit diffusion and GB trapping. In the end, the spectrum, combined with a thermodynamic model, is utilized to derive the equilibrium hydrogen concentration at GBs. This framework has significant implications for applications to industrial material, which enables the transposition from the atomic scale to real-world scenarios.Fulltext not availabl
Mao yi yu he ping = Trade and peace
No full textBen shu you mao yi pian, Zhan zheng pian, He ping pian zu cheng. Bao kuo mao yi yu he ping xiang rong gong sheng, Di li da fa xian zhi qian de mao yi yu fen zheng, Xi fang zi you mao yi ban sui mao yi zheng duan er jue qi, Jin dai zhan zheng he mao yi shi zhong guo rong ru shi jie, Feng yun bian huan de ban ge shi ji, Mao yi zao jiu zhan hou de xiang dui he ping, Mao yi yu he ping de wei lai fa zhan gong qi zhang nei ron
Mileewa digitata Yu & He & Yang 2021, sp. nov.
No full textMileewa digitata sp. nov. (Figs 1–2) Length: ³4.2–4.6 mm, ♀ 4.6–4.7 mm. Coloration. Head, thorax and forewing black. Upper half of crown brownish (black in some males), bearing three yellowish longitudinal stripes and some irregular cloudy spots. Eyes and ocelli off-white. Scutellum yellow white in distal half, medium of basal half brown yellowish, with a distinct vertical line and two round black spots beside end of vertical line (thorax and scutellum totally black, without stripe in some males). Face, thorax in ventral view and legs yellow white, pretarsus black, abdomen yellowish ventrally, subgenital plates and pygofer dark brown. Forewing with scattered yellow-brown translucent spots in basal half, outer margin with transparent edge, posterior margin with two equirotal transparent markings at medium, distal area with two preapical crescent-shaped transparent markings. External features. Head anterior margin roundly produced in dorsal view, median length of crown equal to interocular width; ocelli located on line between anterior eye angles; lateral frontal suture extending onto crown and attaining ocelli; coronal suture reaching two-third median length of crown. Face with frontoclypeus moderately convex, muscle impressions distinct, anteclypeus longitudinally swollen, clypeal suture obscure. Male genitalia. Male pygofer trapezoidal in lateral view, dorsal margin straight, surface with few microsetae, ventral process slender not reaching posterior margin, curved dorsad. Anal tube appendage absent. Subgenital plates longer than pygofer, surface bearing biserial macrosetae and slender and short setae from basal 1/4 to apex. Connective trapezoidal, longer than wide. Style slender, apex with finger-like process directed dorsad, with few teeth. Aedeagus elongate, preatrium absent, dorsal apodeme developed, aedeagal shaft sinuate in lateral view, with numerous denticule in distal half, apex either with two long processes directed basad, five small asymmetric processes or a few teeth (see Remarks); gonopore preapical on posterior surface. Etymology. The specific epithet is derived from the Latin word digitus meaning finger-like, referring to the finger-like process of the style. Material examined. Holotype ³, China: Tibet, Motuo, Beibeng, 1 August 2020, coll. Xiaofei Yu & Zaihua Yang. Paratypes: 2³³, 18♀♀, the same data as holotype; 23³³, 56♀♀, China: Tibet, Motuo, 27–31 July 2020, coll. Xiaofei Yu & Fangling Xu; 10³³, 7♀♀, China: Tibet, Motuo, Beibeng, 1–3 August 2020, lighted by Xiaofei Yu; 1³, 4♀♀, China: Tibet, Motuo, Beibeng, 13 August 2020, coll. Xianyi Wang; 3³³, 6♀♀, China: Tibet, Motuo, Dexing (1068 m), 15 August 2020, coll. Xianyi Wang. (GUGC). Remarks. This species is very similar to Mileewa octospina Yang, 2010 in external morphological characteristics, but differs from the later in having the ventral pygofer process very slender and apical processes of the aedeagus extended laterad. The variation found in the apex of the aedeagus, i.e., either with two long symmetrical processes, five small asymmetric processes or a few teeth, is treated as intraspecific.Published as part of Yu, Xiao-Fei, He, Hong-Li & Yang, Mao-Fa, 2021, Three new species of Mileewa (Hemiptera: Cicadellidae: Mileewinae) from Tibet China, pp. 435-443 in Zootaxa 4933 (3) on page 436, DOI: 10.11646/zootaxa.4933.3.9, http://zenodo.org/record/455512
Yu Takeuchi
No full textYu Takeuchi is serving for JAXA since 2007 and currently working as Associate Senior Administrator at Management and Integration Department of Human Spaceflight Technology Directorate. He is also working as Researcher at the Institute of Space Law of Keio University. He received LL.M. degree from the Institute of Air and Space Law of McGill University in 2015. His main interest is in international space law inter alia the legal aspects of space traffic management and sustainable space development. He is a member of the Air Law Institute of Japan, Japanese Society of International Law, and the International Institute of Space Law (IISL).
Main Works Published in English
- “Toward the International Regime for Space Traffic Management -What to Fix the Current International Regulations-”, (November 5, 2014). Space Traffic Management Conference, Paper 23 (http://commons.erau.edu/stm/2014/wednesday/23).
- “Regulatory Regime for Tomorrow’s Suborbital Space Flights: Point-to-point International Flights”, 56th Colloquium on the Law of Outer Space, 2013.
- “Space Traffic Management as a Guiding Principle of the International Regime of Sustainable Space Activities,” 4 Journal of East Asia and International Law, 2011
- “Japanese Perspective on Legal Issues of Commercial Human Spaceflight” (co-author), 53rd Colloquium on the Law of Outer Space, 2011
- “Legal Points at Issue about NEO Threat Response and International Cooperation” (co-author), 28th International Symposium on Space Technology and Science, 2011
- “From Guideline to International Treaty for Rule of Law concerning Mitigation of Space Debris?” (co-author), 52nd Colloquium on the Law of Outer Space, 2010
Main Works Published in Japanese (title translated into English)
- “What is Space Traffic Management”, Vol. 46, No.9, Journal of the Japanese Institute of International Business Law, 2018.
- Soichiro Kozuka & Masahiko Sato eds., Introduction of Space Law for Entrepreneur (2nd. Ed.), Yuhikaku, 2018. (co-authored)
-“Challenges to International Space Law for Managing Space Traffic”, 55 Kuho (Air Law), 2014.
-“Legal Points as Issues of NEO Threat Response and International Cooperation” (co-author), 3 Spaceguard Research, Japan Spaceguard Association, 2011https://commons.erau.edu/stm-images/1121/thumbnail.jp
Lam Yu oral history interview and transcript
No full textThis recording and transcript form part of a collection of oral history interviews conducted by the Chao Center for Asian Studies at Rice University. This collection includes audio recordings and transcripts of interviews with Asian Americans native to or living in Houston.Born in 1977 in Taishan, Guangdong, China, Dr. Lam Yu currently serves as an Associate Teaching Professor of Physics and Astronomy at Rice University. In Hong Kong, where he grew up, Yu attended Heoi Ta Tung Primary School and learned the importance of a good education from a young age. He moved to the US shortly before completing elementary school. Having attended two different elementary schools on opposite sides of Houston, he recalls how each neighborhood’s affluence impacted its quality of public education. Later, Yu attended Trinity University for his undergraduate education. There, he not only realized that he wanted to pursue physics as a future career path, but also made some of his closest friends who he still keeps in touch with today.
After completing college, Yu attended graduate school at Rice University, and then occupied a post-doctoral research position at the National Institute of Standards and Technology (NIST) in Maryland. Yu’s original plan was to become tenure faculty, so following his post-doc, he accepted a tenure track position at the University of Memphis. However, when he and his wife were expecting their firstborn child, Yu realized that Memphis was not his ideal environment to raise a family in, because it was so segregated. As a result, Yu left Memphis and accepted a teaching position at Rice University. Throughout his nine years of teaching physics and astronomy at Rice, he has continuously honed his teaching skills, aiming to cultivate an inclusive classroom environment that supports Rice’s diverse student body.
Along with his wife and three children, Yu looks forward to forming more personal connections with students as the newly appointed Head Residential Associate at Hanszen College. Outside of his career, he enjoys spending time with his kids, reading, listening to podcasts and audiobooks, traveling, and experimenting with various projects
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