EC63-1836 Plant Diseases : Treatment of Tree Injuries

Extension Circular 63-1836 discuses Treatment of Tree Injuries which is part of the series Plant Diseases

EC63-1836 Plant Diseases : Treatment of Tree Injuries

Extension Circular 63-1836 discuses Treatment of Tree Injuries which is part of the series Plant Diseases

Interactive Web-based Calculus Tutorials

Programs exist, such as Maple, which enable developers to create tutorial applications that use a computer algebra system for complex calculus computations involved in generating problems, checking student responses and generating interactive 2D and 3D plots which are static or animated. However, only some of these applications can be embedded in a webpage. In response, this project has developed browser-based tutorials for the MYMathApps Calculus [1] text which generate random calculus problems for students to solve, check their responses (including all intermediate steps) and give helpful feedback. Many tutorials include professional quality 2D and 3D graphics (static and animated) that are interactive in that students can plot their own functions, rotate or drag objects with a mouse, change colors (for accessibility) and add or remove objects from the plot. Generating problems and checking answers is done using the Sage [2] computer algebra system. The graphics are made with three.js [3], a powerful WebGL-based JavaScript library. Math is displayed in LaTeX using MathJax [4]. User answers are parsed by MathLex [5] so they can be displayed in Latex and sent to the Sage server. The web page is written in HTML5, CSS and JavaScript using Node.js [6] and React [7]

False Smut of Buffalograss

False smut of buffalograss, Buchloe dactyloides (Nutt.) Engelm., caused by Cercospora seminalis Ell. & Ev. is a disease that destroys the unfertilized ovary. The disease was first reported by J. B. Ellis and B. M. Everhart in 1888. They gave only a brief description of the disease and named the causal fungus Cercospora seminalis. There are no etiological studies of false smut recorded in the literature. The origin of the term false smut is unknown to the author, but it so descriptively fits the general appearances of the disease that one readily understands its usage. The following studies were conducted from 1950 to 1954

EC59-1831 Plant Diseases : Soil Treatments for Damping-Off

Extension Circular 59-1831 is about plant diseases specifically the soil treatments for damping – off. This includes the fungicides for damping-off, nematicides, soil sterilants, and the precautions

EC68-1846 Fingertip Spray Chart for Tree and Shrub Diseases

Extension Circular 68-1846 “Fingertip” spray chart for tree and shrub diseases

EC68-1847 Nebraska Root-Gall Nematode of Sugar Beets

Extension Circular 68-1847 is about nematodes which are microscopic organisms living in soil. Nebraska root-gall nematode of sugar beets

EC68-1844 Fingertip Spray Chart for Fruit Diseases

Extension Circular 68-1844 “Fingertip” spray chart for fruit diseases

EC68-1844 Fingertip Spray Chart for Fruit Diseases

Extension Circular 68-1844 “Fingertip” spray chart for fruit diseases

Comparison of 3D transitional CFD simulations for rotating wind turbine wings with measurements:Paper

Since the investigation of van Ingen et al., attempts were undertaken to search for laminar parts within the boundary layer of wind turbines operating in the lower atmosphere with much higher turbulence levels than seen in wind tunnels or at higher altitudes where airplanes usually fly. Based on the results of the DAN-Aero experiment and the Aerodynamic Glove project, a special work package Boundary Layer Transition was embedded in IAEwind Task 29 MexNext 3rd phase (MN3). Here, we report on the results of the application of various CFD tools to predict transition on the MEXICO blade. In addition, recent results from a comparison of thermographic pictures (aimed at detecting transition) with 3D transitional CFD are included as well. The MEXICO (2006) and NEW MEXICO (2014) wind tunnel experiments on a turbine equipped with three 2.5 m blades have been described extensively in the literature. In addition, during MN3, high-frequency Kulite data from experiments were used to detect traces of transitional effects. Complementary, the following set of codes were applied to cases 1.1 and 1.2 (axial inflow with 10 m/s and 15 m/s respectively) – elsA, CFX, OpenFOAM (with 2 different turbulence/transitional models), Ellipsys, (with 2 different turbulence models and eN transition prediction tool), FLOWer and TAU – to search for detection of laminar parts by means of simulation. Obviously, the flow around a rotating blade is much more complicated than around a simple 2D section. Therefore, results for even integrated quantities like thrust and torque are varying strongly. Nevertheless, visible differences between fully turbulent and transitional set-ups are present. We discuss our findings, especially with respect to turbulence and transition models used