320,558 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
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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
Personal Record of Mr. Kuan Yu-Shan (February 1949)
No full textThis one page document, titled "Personal Record of Mr. Kuan, Yu-Shan, lists biographical information on Kuan Yu Shan, a professor of Physical Education at Peking University who was interested in participating in the development of Research and Training Institute for physical and health education in China. The document lists education, work history and family information
Guo, R., Wang, J.M., Zhang, W., He, D., Yu, J. & Yang, D.M. (2022) Pteris pseudoamoena (Pteridaceae), a new species from Guangxi, China and Vietnam. Phytotaxa 550 (3): 215-223.
No full textGuo, R., Wang, J.M., Zhang, W., He, D., Yu, J., Yang, D.M. (2022): Guo, R., Wang, J.M., Zhang, W., He, D., Yu, J. & Yang, D.M. (2022) Pteris pseudoamoena (Pteridaceae), a new species from Guangxi, China and Vietnam. Phytotaxa 550 (3): 215-223. Phytotaxa 552 (4): 277-277, DOI: https://doi.org/10.11646/phytotaxa.552.4.6, URL: http://dx.doi.org/10.11646/phytotaxa.552.4.
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Personal Record of Mr. Kuan Yu-Shan (February 1949)
No full textThis two-page document, titled "Personal Record of Mr. Kuan, Yu-Shan, lists biographical information on Kuan Yu Shan, a professor of Physical Education at Peking University who was interested in participating in the development of Research and Training Institute for physical and health education in China. The document lists education, work history and family information. This is more expansive than ms546-01-14-003 which is only one-page and does not include much of the information on the second page.For more information about Lu Hui-chʻing, see:https://springfield.as.atlas-sys.com/agents/people/97
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Yu Schuberth Henseler - A flexible way to Study Composites in Ecology using Structural Equation Modeling
No full textThis repository contains a zip file which includes the R syntax file to reproduce the results of Yu et al. (2025).
Reference:
Xi, Yu; Schuberth, Florian; Henseler, Jörg (2025). A flexible way to study composites in ecology using structural equation modeling. Scientific Reports, 15(4597). https://doi.org/10.1038/s41598-025-88675-
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