Balloon Flight Record Status Report

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Modulation and heliocentric gradient of low energy cosmic rays near solar minimum, 1965

Modulation and heliocentric gradient of low energy cosmic rays near solar minimum, 196

A survey of the total radiation in space observed by the OGO satellites, 5 September 1964 - 27 May 1968

Graphical and tabular summaries of ionization rates in space recorded by OGO spacecraft ion chamber

Plasma heating, plasma flow and wave production around an electron beam injected into the ionosphere

A brief historical summary of the Minnesota ECHO series and other relevant electron beam experiments is given. The primary purpose of the ECHO experiments is the use of conjugate echoes as probes of the magnetosphere, but beam-plasma and wave studies were also made. The measurement of quasi-dc electric fields and ion streaming during the ECHO 6 experiment has given a pattern for the plasma flow in the hot plasma region extending to 60m radius about the ECHO 6 electron beam. The sheath and potential well caused by ion orbits is discussed with the aid of a model which fits the observations. ELF wave production in the plasma sheath around the beam is briefly discussed. The new ECHO 7 mission to be launched from the Poker Flat range in November 1987 is described

Magnetospheric substorm effects on energetic electrons in the outer Van Allen belt /Summary of technical report CR-137/

Substorm-associated acceleration effects on electron increases in post-midnight sector of outer radiation bel

Description of data plots from the University of Minnesota ion chamber and electron spectrometer on OGO-1 and OGO-3

Data plots obtained from ion chamber and electron spectrometer experiments aboard OGO A and OGO C satellite

Experimental verification of drift shell splitting in the distorted magnetosphere

OGO-3 and ATS-1 data used in experimental verification of drift shell splitting in distorted magnetospher

A renormalization fixed point for Lorenz maps

A Lorenz map is a Poincar\'e map for a three-dimensional Lorenz flow. We describe the theory of renormalization for Lorenz maps with a critical point and prove that a restriction of the renormalization operator acting on such maps has a hyperbolic fixed point. The proof is computer assisted and we include a detailed exposition on how to make rigorous estimates using a computer as well as the implementation of the estimates.Comment: 29 pages, 2 figure

An atlas of 10-50 keV solar flare X-rays observed by the OGO satellites, 5 September 1964 to 31 December 1966

Ionization rate profiles from solar flare X rays observed by ion chambers aboard OGO 1 and OGO

Benthic macroinvertebrates and degradation of phytomass as indicators of ecosystem functions in flooded rice cropping.

The objective of this work was to evaluate the ecosystem functions of a natural wetland and of artificially flooded rice areas, managed under organic and conventional systems, by phytomass degradation and by the colonization of this material by benthic macroinvertebrates. The experiment was carried out in a natural wetland area, and in two flooded rice areas managed under organic and conventional systems. Twenty-five decomposition bags filled with 10 g of dry vegetation were installed in each site. At 14, 28, 42, 56, and 70 days after the beginning of the experiment, five bags from each site were collected. Macroinvertebrates were identified and classified by functional trophic group. The number of species of benthic macroinvertebrates increased: natural wetland > organic system > conventional system. The Chironomidae group was present in all areas, confirming its food plasticity and adaptability to different substrates and environmental stress situations. The Amphipoda group was present only in the artificially flooded rice area, and the Acari, only in the natural wetland. The diversity of species in the natural wetland area was higher than in the artificially flooded rice area. Nutrient cycling, provided by phytomass decomposition, is affected by the management system, and the delay in this process causes a reduction of the ecosystem functions in the conventional system.Título em português: Macroinvertebrados betônicos e degradação da fitomassa como indicadores de funções ecossistêmicas em arroz irrigado por inundação