1,305 research outputs found
Complete genome sequence of bovine polyomavirus type 1 from aborted cattle, isolated in Belgium in 2014
<p>The complete and fully annotated genome sequence of a bovine polyomavirus type 1 (BPyV/BEL/1/2014) from aborted cattle was assembled from a metagenomics data set. The 4,697-bp circular dsDNA genome contains 6 protein-coding genes. Bovine polyomavirus is unlikely to be causally related to the abortion cases. </p></p
Digital analysis of wind tunnel imagery to measure fluid thickness
Documented here are the procedure and results obtained from the application of digital image processing techniques to the problem of measuring the thickness of a deicing fluid on a model airfoil during simulated takeoffs. The fluid contained a fluorescent dye and the images were recorded under flash illumination on photographic film. The films were digitized and analyzed on a personal computer to obtain maps of the fluid thickness
Evolution des variétés cotonnières en Côte d'Ivoire de 1978 à 1997
Les variétés cotonnières ivoiriennes, d'abord strictement issues de la descendance du triple hybride HAR, ont au cours des 20 dernières années intégré de plus en plus de matériel originaire d'autres pays. ISA 268 est le dernier cultivar purement HAR les créations récentes incorporant en particulier du matériel américain. D'une culture quasiment monovariétale jusqu'à 1987, on a évolué vers une situation plus complexe avec la présence simultanée en grande culture de deux ou trois types variétaux différents, dans des buts de diversification commerciale. Le système de sélection pedigree massale amène un renouvellement très rapide en moyenne chaque 1,3 année - des variétés. Avec 37 cultivars ou ressélections diffusés en 20 ans, dont 24 sur plus de 10.000 ha, la situation variétale en Côte d'Ivoire apparaît très dynamique. En grande culture, les rendements avicoles semblent stagner depuis le milieu des années 80, mais le taux de fibre à l'égrenage et la qualité de la production ont progressé de manière très considérable
A Computer Program for Calculating Three-Dimensional Compressible Laminar and Turbulent Boundary Layers on Arbitrary Wings
A computer program for calculating three dimensional compressible laminar and turbulent boundary layers on arbitrary wings is described and presented. The computer program consists of three separate programs, namely, a geometry program to represent the wing analytically, a velocity program to compute the external velocity components from a given experimental pressure distribution and a finite difference boundary layer method to solve the governing equations for compressible flows. To illustrate the usage of the computer program, three different test cases are presented and the preparation of the input data as well as the computed output data is discussed in some detail
Real-Time analysis and visualization for single-molecule based super-resolution microscopy
Accurate multidimensional localization of isolated fluorescent emitters is a time consuming process in single-molecule based super-resolution microscopy. We demonstrate a functional method for real-time reconstruction with automatic feedback control, without compromising the localization accuracy. Compatible with high frame rates of EM-CCD cameras, it relies on a wavelet segmentation algorithm, together with a mix of CPU/GPU implementation. A combination with Gaussian fitting allows direct access to 3D localization. Automatic feedback control ensures optimal molecule density throughout the acquisition process. With this method, we significantly improve the efficiency and feasibility of localization-based super-resolution microscopy
Mobility of Edge Dislocations in the Basal‐Slip System of Zinc
This paper presents the results of measurements of the velocities of 〈1210〉 (0001) edge dislocations in zinc as a function of applied shear stress. All tests were conducted at room temperature on 99.999% pure zinc monocrystals. Dislocations were revealed by means of the Berg‐Barrett x‐ray technique. Stress pulses of microsecond duration were applied to the test specimens by means of a torsion testing machine. Applied resolved shear stresses ranged from 0 to 17.2×10^6 dyn∕cm^2 and measured dislocation velocities ranged from 40–700 cm∕sec. The results of this study indicate that the velocity of edge dislocations in the basal slip system of zinc is linearly proportional to the applied resolved shear stress. These results are analyzed in terms of the phonon drag theory. Agreement between this theory and the results reported here is quite good
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