512 research outputs found
Some Student Ideas on the Median and the Mode
No full textThis article, created by G.V. Barr, proposes to make a "tentative contribution to the knowledge of students' understanding of the statistical concepts; median and mode." It relates to a pilot study and tries to answer questions connected with the mistakes students tend to make: 1.What are the difficulties, 2.How many students have difficulties of this kind, 3.ÂHow does the statistical vocabulary develop with respect to concept? The author first provides a general introduction, then an introduction to the median, an introduction to the mode and finally discussion questions/conclusions. This is a nice overview of these different statistical concepts
FIGURES 17–20. 17 in Reassessment of the status of some European and Asian Melitaea taxa described as subspecies of Melitaea phoebe ([Denis & Schiffermüller], 1775), with designations of lectotypes where appropriate (Lepidoptera: Nymphalidae)
No full textFIGURES 17–20. 17, Holotype of Melitaea phoebe abbas, Gross & Ebert, 1975. © R. Trusch. 18, Allotype of Melitaea phoebe abbas, Gross & Ebert, 1975. © Alipanah. 19, Holotype of Melitaea ornata adversaria Korb, Stradomsky & Kuznetsov, 2015. 20, Paratype of Melitaea ornata reliquiae Korb, Stradomsky & Kuznetsov, 2015. Figs 19, 20 © S.K. Korb, B.V. Stradomsky & G.V. Kuznetsov. A = upperside, B = underside, C = labels on specimen pin.Published as part of Russell, Peter J. C., Lukhtanov, Vladimir A. & Tennent, W. John, 2022, Reassessment of the status of some European and Asian Melitaea taxa described as subspecies of Melitaea phoebe ([Denis & Schiffermüller], 1775), with designations of lectotypes where appropriate (Lepidoptera: Nymphalidae), pp. 25-38 in Zootaxa 5141 (1) on page 34, DOI: 10.11646/zootaxa.5141.1.2, http://zenodo.org/record/657762
Materials to study of Papilionoidea butterflies (Lepidoptera) from Volgograd region
Get PDFIn the course of a long term (1988–2009) study of butterflies carried out in Volgograd region, a total of 117 Papilionoidea species is report for this regio
Some data about biology Melitaea telona Fruhstorfer, 1908 and Melitaea robertsi uvarovi Gorbunov, 1995 (Lepidoptera: Nymphalidae) on Volgograd region
Get PDFPapilionoidea butterflies (Lepidoptera) from Volgograd region
Get PDFThe article provides published and new data of distribution of Papilionoidea butterflies (Lepidoptera) from Volgograd regio
Cadmium Sulfide-Porous Silicon nanocomposite structures
No full textOptimum conditions for the formation of cadmium sulfide nanoparticles in a porous silicon matrix have been determined. The mechanisms of charge transfer in the formed heterostructures and their dependences on the porous layer properties and conditions of CdS nanoparticle synthesis have been studied. The spectral distribution and the intensity of photoluminescence are demonstrated to be governed by the concentration and the size of synthesized CdS nanocrystallites, as well as the efficiency of radiation recombination at deep centers bound with defects. © N.A. DAVIDENKO, G.V. KUZNETSOV, YU.S. MILOVANOV, 2013
Numerical study of the viscous drop spreading process when transferring heat to a substrate of simple geometry
No full textWe present a two-dimensional non-stationary model for calculating heat transfer when spreading a liquid viscous drop on a heated substrate. Calculations on the process of fixed drops spreading on a substrate of simple geometry are performed. The hydrodynamic picture of the spreading process is obtained. The influence of the model parameters on the nature of spreading is studied. The temperature profiles of the droplet surface are obtained. The estimation of the time to establish a stationary mode is obtained
Medal presentations.
No full textTyped Description: Magnolia Medal is awarded to Maj. Feilden Mitts by Gen W.P. Wilson, the Adjutant General of Mississippi; Lt Major D. Jefcoat accepts the Minniece Rifle Trophy from Lt. Col. G.V. Montgomery (150TH TC BN) ; Dixie Division Albumhttps://egrove.olemiss.edu/cfclayton/1032/thumbnail.jp
A new record of Tragulus versicolor (Artiodactyla, Tragulidae) from Vietnam, and its sympatric occurrence with T. kanchil.
No full textPrediction of power semiconductors devices reliability working in cyclic mode
No full textA new approach prediction of reliability for power semiconductor devices in cyclic mode based on the numerical analysis of nonuniform temperature fields is proposed. We have compared the failure rates of semiconductor power devices in the real thermal regime under natural convection with statistical data. The necessity to consider the actual unsteady temperature fields to enhance the predicted working resource of the power semiconductor in cyclic mode is shown
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