98,595 research outputs found
dycdtools: an R Package for Assisting Calibration and Visualising Outputs of an Aquatic Ecosystem Model
No full textThe high complexity of aquatic ecosystem models (AEMs) necessitates a large number of parameters that need calibration, and visualisation of their multifaceted and multi-layered simulation results is necessary for effective communication. Here we present an R package “dycdtools” that contains calibration and post-processing tools for a widely applied aquatic ecosystem model (DYRESM-CAEDYM). The calibration assistant function within the package automatically tests a large number of combinations of parameter values and returns corresponding values for goodness-of-fit, allowing users to narrow parameter ranges or optimise parameter values. The post-processing functions enable users to visualise modelling outputs in four ways: as contours, profiles, time series, and scatterplots. The “dycdtools” package is the first open-source calibration and post-processing tool for DYRESM-CAEDYM, and can also be adjusted for other AEMs with a similar structure. This package is useful to reduce the calibration burden for users and to effectively communicate model results with a broader community.Full Tex
A Cross-Licensing System Discourages R&D Investments In Completely Complementary Technologies
No full textWe consider the research and development (R&D) investment com petition of duopolistic firms in completely complementary technologies. By "completely complementary technologies," we mean that no firm can produce the goods without both of the technologies. We derive the investments competition equilibria in R&D of the two completely complementary technologies with and without a cross-licensing system. By comparing R&D investment levels in the two equilibria, we show that the cross-licensing system discourages the R&D invest ments when the duopolistic firms produce goods by using the two completely complementary technologies.completely complementary technologies, cross-licensing system, R&D investments
Firm R&D, Absorptive Capacity and Learning by Exporting: Firm-level Evidence from China
No full textThe absorptive capacity of firms developed through R&D promotes learning by exporting. In this paper, we estimate the instantaneous and long-run productivity effects of exporting on the universe of Chinese manufacturing firms. We find that exporting has very different productivity effects for firms with different pre-export R&D status. It has large and lasting productivity effects for firms with pre-export R&D, while it has little effects for firms without pre-export R&D. Furthermore, the effect of exporting increases with the number of years of pre-export R&D investment.Business, FinanceEconomicsInternational RelationsSSCI0ARTICLE91131-11453
Three new species of Coenosia Meigen (Diptera: Muscidae) from P. R. China, with a key to the Chinese species of the genus
No full textXue, Wan-Qi, Zhu, Yu (2006): Three new species of Coenosia Meigen (Diptera: Muscidae) from P. R. China, with a key to the Chinese species of the genus. Zootaxa 1326: 1-16, DOI: 10.5281/zenodo.17410
Correlated hyperfine interactions in amorphous Cr72-xFexC17Si8Al3 alloys
No full textPT: J; CR: BAHADUR D, 1987, J MATER SCI, V22, P2477 DINI K, 1986, J MATER SCI, V21, P1037 DUNLAP RA, 1982, CAN J PHYS, V60, P909 DUNLAP RA, 1985, J MATER SCI LETT, V4, P773 EIBSCHUTZ M, 1983, PHYS REV B, V28, P425 INGALLS R, 1978, MOSSBAUER ISOMER SHI, P361 LECAER G, 1979, J PHYS E SCI INSTRUM, V12, P1083 OLIVIER M, 1982, J APPL PHYS, V53, P7696 POLLARD RJ, 1984, PHYS REV B, V29, P4864 YU BL, 1984, J APPL PHYS, V55, P1748; NR: 10; TC: 10; J9: J PHYS-F-METAL PHYS; PG: 8; GA: R0716Source type: Electronic(1
Perspectives on Identity, Migration, and Displacement
No full textPerspectives on Identity, Migration, and Displacement -- edited by Steven Tötösy de Zepetnek, I-Chun Wang, and Hsiao-Yu Sun (Kaohsiung: National Sun Yat-sen University Press, 2010. ISBN 9789860235418 209 pages, bibliography, index) is a collection of articles about sociological and literary aspects of identity formation as a consequence of (im)migration. (Im)migration results in the problematics of assimilation and hybridity and in postcolonial scholarship, in particular, attention is paid to the concept of migration termed Creolization on the ground that cultural contact, cultural transmission, and cultural transformation result in the creation of new cultures. Copyright release by National Sun Yat-sen University to the authors 2013
Gödel-type solutions within the f(R, Q, P) gravity
No full textAbstract In this work, we scrutinize the consistency of spacetime homogeneous Gödel-type metrics within f(R, Q, P) theories of gravity for well-motivated matter sources. As it is well known, such geometries allow for causality violation. We provide general conditions to engender completely causal solutions in a manner completely different from general relativity. We take some specific models, for instance, f ( R , Q , P ) = R - μ 4 n + 2 a R 2 + b Q + c P n , to illustrate the general results. Notably, we also find an unusual completely causal vacuum solution in the presence of a non-trivial cosmological constant which corresponds to the case m 2 = 4 ω 2
6. Rai Yu (1226-1304)
No full textIwao Seiichi, Iyanaga Teizō, Ishii Susumu, Yoshida Shōichirō, Fujimura Jun'ichirō, Fujimura Michio, Yoshikawa Itsuji, Akiyama Terukazu, Iyanaga Shōkichi, Matsubara Hideichi. 6. Rai Yu (1226-1304). In: Dictionnaire historique du Japon, volume 16, 1990. Lettres N (2), O, P et R (1) p. 165
6. Rai Yu (1226-1304)
No full textIwao Seiichi, Iyanaga Teizō, Ishii Susumu, Yoshida Shōichirō, Fujimura Jun'ichirō, Fujimura Michio, Yoshikawa Itsuji, Akiyama Terukazu, Iyanaga Shōkichi, Matsubara Hideichi. 6. Rai Yu (1226-1304). In: Dictionnaire historique du Japon, volume 16, 1990. Lettres N (2), O, P et R (1) p. 165
Effects of level quantization on the supercurrent decay in Josephson junctions: The nonstationary case
No full textThe effects of the presence of quantized energy levels in the problem of the (V=0)-state decay in Josephson junctions have been investigated. The analysis has been extended to the case of nonstationary conditions. As a result, the dependences of both the decay rate and the switching-current distribution on the bias current are strongly modified with respect to those obtained in stationary conditions. The investigation is carreid out for various working conditions and junction parameters
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