Pion-kaon scattering amplitude constrained with forward dispersion relations up to 1.6 GeV

In this work we provide simple and precise parametrizations of the existing πK scattering data from threshold up to 1.6 GeV, which are constrained to satisfy forward dispersion relations as well as three additional threshold sum rules. We also provide phenomenological values of the threshold parameters and of the resonance poles that appear in elastic scattering.

The role of nutrients for improving seedling quality in drylands

Forest plantations have been extensively used to combat desertification. In drylands, harsh climate conditions and unfertile soils often preclude seedling establishment. The improvement in seedling quality by manipulating nutrient availability could contribute to increase planting success. However, morpho-functional traits defining optimum seedling quality in drylands, and the fertilization schemes to achieve them, are still under discussion. Several studies suggest that well fertilized seedlings may perform better than nutrient limited seedlings in these environments. However, recent works have shown opposite results. In this review, we discuss the concept of seedling quality in drylands based on an evaluation of the effects of nutrient manipulation on seedling morpho-functional traits and field performance. According to existing data, we hypothesize that nutrient-limited small seedlings may be better adapted to arid environments and unfavorable microsites, where access to water is uncertain and a conservative water use strategy may be advantageous. In contrast, in dry sub-humid areas, areas with deep soils, protected from excess radiation, and areas where irrigation is feasible, well-fertilized big seedlings with high root growth potential may have more chances of success. We discuss this theory in the context of the multiple objectives of dryland restoration and the environmental constrains posed by these areas, and identify knowledge gaps that should be targeted to test our hypothesis.

The application of electricity to the dispersion of fog ...

Typewritten ms.

Optical rotatory dispersion; applications to organic chemistry.

Includes bibliography.

Iterative and Pade solutions for the water-wave dispersion relation /

"April 1985."

Heat dispersion in physical estuarine models : report 2, experiments in the Delaware River model, report 2 of a series /

Prepared for Office, Chief of Engineers, U.S. Army, Washington, D.C.

Highway air pollution dispersion modeling: preliminary evaluation of thirteen models. Final report.

Transportation Department, Office of the Assistant Secretary for Systems Development and Technology, Washington, D.C.

CALINE2 - an improved microscale model for the dispersion of air pollutants from a line source. Interim report.

Federal Highway Administration, Washington, D.C.

Effects of oil slick properties on the dispersion of floating oil into the sea /

Bibliography: p. 321-326.

A study to conduct experiments concerning turbulent dispersion of oil slicks /

Final report; April 1978.

Graphs for estimating atmospheric dispersion /

"This research was performed under an agreement between the U.S. Weather Bureau and the U.S. Atomic Energy Commission."