179,137 research outputs found
Kleinsasser Barn, Hutchinson County
No full text35 mm slide, an overgrown lot with two single-story buildings with a common wallDrawer info: Pennington -Turner; Turner Co. - Irene (underlined) House on Main Street.Kodachrome Slide M. Koop Kleinsasser Housebarn Turner Sec. 14 99N 55W east elevation G-R (2) O 10 Jul 82C1
Replication data for: How do the media scrutinise central banking? Evidence from the Bank of England
No full textThe R file and data sets that can be accessed here allow for the replication of all the models and figures presented in the article and appendices on "How do the media scrutinise central banking? Evidence from the Bank of England"
Hans-Georg Steiner: A life dedicated to the development of didactics of mathematics as a scientific discipline
No full textBiehler R, Peter-Koop A. Hans-Georg Steiner: A life dedicated to the development of didactics of mathematics as a scientific discipline. ZDM: The International Journal on Mathematics Education (formerly Zentralblatt für Didaktik der Mathematik) . 2007;39(1/2):3-30
The development of mathematics education as a scientific discipline – Reflections from a German perspective
No full textPeter-Koop A, Biehler R. The development of mathematics education as a scientific discipline – Reflections from a German perspective. International Journal for the History of Mathematics Education. 2008;3(2):83-90
The role of organic aerosols in homogeneous ice formation
No full textKärcher B, Koop T. The role of organic aerosols in homogeneous ice formation. ATMOSPHERIC CHEMISTRY AND PHYSICS. 2005;5(3):703-714.Recent field observations suggest that the fraction of organic-containing aerosol particles in ice cloud particles is diminished when compared to the background aerosol prior to freezing. In this work, we use model calculations to investigate possible causes for the observed behavior. In particular, homogeneous freezing processes in cooling air parcels containing aqueous inorganic particles and organic particles are studied with a detailed microphysical model. A disparate water uptake and resulting size differences that occur between organic and inorganic particles prior to freezing are identified as the most likely reason for the poor partitioning of organic aerosols into the ice phase. The differences in water uptake can be caused by changes in the relationship between solute mass fraction and water activity of the supercooled liquid phase, by modifications of the accommodation coefficient for water molecules, or by a combination thereof. The behavior of peak ice saturation ratios and total ice crystal number concentrations is examined, and the dependence of the results on cooling rate is investigated. Finally, processes are discussed that could possibly modify the homogeneous freezing behavior of organic particles
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
Natuurlijke aanpakken voor het werken met grootheden
No full textPeter-Koop A. Natuurlijke aanpakken voor het werken met grootheden. In: Keijzer R, Uittenbogaard W, eds. Uit de lengte of uit de breedte. De kwaliteit van het meetonderwijs . Utrecht: Panama, Freudenthal Institute; 2001: 47-60
"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.
Experiments and Models for Decision Fusion by Humans in Sociotechnical Networks
No full textData used for modeling human decision fusion. This data was used for models built in
1. A. Vempaty, L. R. Varshney, G. J. Koop, A. H. Criss, and P. K. Varshney, "Decision Fusion by People: Experiments, Models, and Sociotechnical System Design," in Proc. 3rd IEEE Global Conference on Signal and Information Processing (GlobalSIP), Orlando, Florida, Dec. 14-16, 2015.
2. A. Vempaty, L. R. Varshney, G. J. Koop, A. H. Criss, and P. K. Varshney, \Experiments and Models for
Decision Fusion by Humans in Sociotechnical Networks," IEEE Trans. Signal Process, under review
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
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