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International comparison CCQM-K119 liquefied petroleum gas
Brewer, P J,Downey, M L,Atkins, E,Brown, R J C,Brown, A S,Zalewska, E T,van der Veen, A M H,Smeulders, D E,McCallum, J B,Satumba, R T,Kim, Y D,Kang, N,Bae, H K,Woo, J C,Konopelko, L A,Popova, T A,Mesh IOP 2018 Metrologia Vol.55 No.-
<P></P> <P>Liquefied hydrocarbon mixtures with traceable composition are required in order to underpin measurements of the composition and other physical properties of LPG (liquefied petroleum gas), thus meeting the needs of an increasingly large industrial market.</P> <P>This comparison aims to assess the analytical capabilities of laboratories for measuring the composition of a Liquid Petroleum Gas (LPG) mixture when sampled in the liquid phase from a Constant Pressure Cylinder. Mixtures contained ethane, propane, propene, i-butane, n-butane, but-1-ene and i-pentane with nominal amount fractions of 2, 71, 9, 4, 10, 3 and 1 cmol mol<SUP>−1</SUP> respectively.</P> <H2>Main text</H2> <P> To reach the main text of this paper, click on <A HREF='https://www.bipm.org/utils/common/pdf/final_reports/QM/K119/CCQM-K119.pdf'>Final Report</A>. Note that this text is that which appears in Appendix B of the BIPM key comparison database <A HREF='http://kcdb.bipm.org/'>kcdb.bipm.org/</A>.</P> <P>The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).</P>
When outbound mobility programs and service learning align in pre-service teacher education
Anne Power,Son Truong,Tonia Gray,Greg Downey,Tim Hall,Benjamin Jones 서울대학교 교육연구소 2017 Asia Pacific Education Review Vol.18 No.3
This project sought to investigate the learning that comes about from the intersection of outbound mobility experience programs (OMEs) with service learning in pre-service teacher education settings. The aim of the program of international service learning in the case study was to encourage pre-service teachers to rethink potentially ethnocentric assumptions. The guiding research question was, ‘What outcomes ensue from the combination of OMEs and service learning for pre-service teachers?’ The focus of the paper was on OMEs that took place in China and Malaysia. Findings included that the combined program aided development of global mindedness, learning by being there, teacher experience in a new context and the development of a professional identity in the participating students.
Talents First!: Wu Ta-you and Science Policy Infrastructures in the Republic of China (1927-1970)
( Chang Kuo-hui ),( Gary Lee Downey ),( Shih Bono Po-jen ) 한국과학사학회 2020 한국과학사학회지 Vol.42 No.2
A main theme in the history of science policy in Taiwan concerns the positioning of science infrastructures in nation building and rapid economic growth. This article calls attention to another evolving initiative in science policy in the Republic of China (ROC), one that emphasized the production of talents who could become societal leaders, including by working for and within government. We trace the emergence of this initiative through the career of Wu Ta-you, who grew up in mainland China, earned his Ph.D. in the United States, and worked on the margins of reconstruction during the 1930s. Through the 1950s, he played a leadership role advocating for long-term planning to develop fundamental researchers in science in Taiwan. His moment appeared to come in 1967 when he became the president’s chief science adviser. His efforts to develop science talents were soon displaced, however, by emerging shorter-term initiatives to support the military and industry. Clearly not contributing as an instrumental technocrat nor a proponent for autonomous basic research, was he attempting to combine the identity of a scientist with that of the Chinese scholar-official? By taking science policy in a different direction, the ROC, in Wu’s terms, remained stuck on the surface of science.
Tengfei Yu,Qi Feng,Jianhua Si,Xiaoyou Zhang,Downey Alec,Chunyan Zhao 한국식물학회 2016 Journal of Plant Biology Vol.59 No.6
Extensive research has found that nighttime transpiration (E n) is positively correlated to the vapour pressure deficit (VPD), that suggested E n was highest during the night under high temperatures and low humidity along with high soil water availability, typically for the riparian forest in the extreme arid region of China. This study used the heat ratio method to measure sap velocity (V s) for mature and saplings Populus euphratica Oliv., and then E n was conservatively calculated as total nocturnal sap flow (F s, the product of V s and sapwood area A s) between 01:00 to 06:00. A gas exchange system was used to measure the leaf transpiration rate (T r) and stomatal conductance (g s) of saplings. For mature trees, nighttime V s was extensive and logarithmic correlated to VPD (similar to daytime). For saplings, g s and T r was extensive in different months, and also a strong logarithmic relationship was found between V s and VPD for both daytime and nighttime periods. Both of stem sap flow and leaf gas exchange suggusted the occurrence of E n, whether mature or sapling trees. E n contribution to daily transpiration (E d) was high just as expected for P. euphratica, which was confirmed by proportional E n to E d (E n/E d) means taken in 2012 (24.99%) and 2013 (34.08%). Compared to mature trees, E n/E d of saplings in 2013 was lower with means of 12.06%, that supported further by the shorter duration times and less T r,n (16.64%) and g s,n (26.45%) of leaf, suggesting that E n magnitude is associated to individual the tree size, that effect to stored water of individual trees, although this hypothesis requires further research.