Yield prediction by analysis of multispectral scanner data

A preliminary model describing the growth and grain yield of wheat was developed. The modeled growth characteristics of the wheat crop were used to compute wheat canopy reflectance using a model of vegetation canopy reflectance. The modeled reflectance characteristics were compared with the corresponding growth characteristics and grain yield in order to infer their relationships. It appears that periodic wheat canopy reflectance characteristics potentially derivable from earth satellites will be useful in forecasting wheat grain yield

RN and LPN perceptions of front-line delegation

Healthcare organizations face increasing demands to provide the most efficient and economical care possible. Emerging patient care delivery systems require that front-line RNs take on a broader scope of responsibility for patient care, particularly in the area of delegation. Research identifies that staff RNs experience much difficulty in delegating patient care (Conger, 1993; Hansten & Washburn, 1994). The purpose of this study was to explore RN and LPN perceptions of front-line delegation in their working relationships. In particular, the study sought to: (a) determine how changing roles of RNs and LPNs influenced front-line delegation; (b) answer how RNs viewed front-line delegation in comparison to LPNs; and (c) identify barriers to front-line delegation. The research was a qualitative study utilizing an open-ended interview guide to interview 4 non-managerial RNs and 4 LPNs who worked in a midwestern, mid-sized private hospital. Individual, one hour interviews were audio-taped and transcribed. Data analyses were conducted using the constant comparison technique to record, code, and analyze data. Symbolic interactionism provided a theoretical framework for conducting the study. Results indicate that (a) nursing role changes continued to influence front-line delegation over one year after the hospital\u27s implementation of a new patient care delivery system; (b) RN s and LPNs shared similar perceptions of delegation, including perceived barriers to delegation; and (c) RNs tended to learn delegation skills from vicarious role modeling rather than formal training

The usefulness of thermal infrared and related imagery in the evaluation of agricultural resources. An exploratory study, volume I Final report

Multispectral imagery for aerial inventory and analysis of cultivated crop resource

Investigations of vegetation and soils information contained in LANDSAT Thematic Mapper and Multispectral Scanner data

An extension of the TM tasseled cap transformation to reflectance factor data is presented, and the basic concepts underlying the tasseled cap transformations are described. The ratio of TM bands 5 and 7, and TM tasseled cap wetness, are both shown to offer promise of direct detection of available soil moisture. Some effects of organic matter and other soil characteristics or constituents on TM tasseled cap spectral response are also considered

Labeling research in support of through-the-season area estimation

The development of LANDSAT-based through-the-season labeling procedures for corn and soybeans is discussed. A model for predicting labeling accuracy within key time periods throughout the growing season is outlined. Two methods for establishing the starting point of one key time period, viz., early season, are described. In addition, spectral-temporal characteristics for separating crops in the early season time period are discussed

Wheat yield forecasts using LANDSAT data

Several considerations of winter wheat yield prediction using LANDSAT data were discussed. In addition, a simple technique which permits direct early season forecasts of wheat production was described

Forecasts of winter wheat yield and production using LANDSAT data

There are no author-identified significant results in this report

The use of high altitude, color and spectrozonal imagery for the inventory of wildland resources. Volume II - The range resource Annual progress report

High altitude multispectral imagery for identifying and mapping rangeland characteristic

COLLIDE: Collisions into Dust Experiment

The Collisions Into Dust Experiment (COLLIDE) was completed and flew on STS-90 in April and May of 1998. After the experiment was returned to Earth, the data and experiment were analyzed. Some anomalies occurred during the flight which prevented a complete set of data from being obtained. However, the experiment did meet its criteria for scientific success and returned surprising results on the outcomes of very low energy collisions into powder. The attached publication, "Low Velocity Microgravity Impact Experiments into Simulated Regolith," describes in detail the scientific background, engineering, and scientific results of COLLIDE. Our scientific conclusions, along with a summary of the anomalies which occurred during flight, are contained in that publication. We offer it as our final report on this grant

Regolith behavior under asteroid-level gravity conditions: low-velocity impact experiments

The dusty regolith covering the surfaces of asteroids and planetary satellites differs in size, shape, and composition from terrestrial soil particles and is subject to very different environmental conditions. Experimental studies of the response of planetary regolith in the relevant environmental conditions are thus necessary to facilitate future Solar System exploration activities. We combined the results and provided new data analysis elements for a series of impact experiments into simulated planetary regolith in low-gravity conditions using two experimental setups: the Physics of Regolith Impacts in Microgravity Experiment (PRIME) and the COLLisions Into Dust Experiment (COLLIDE). Results of these experimental campaigns found that there is a significant change in the regolith behavior with the gravity environment. In a 10-2g environment (Lunar g levels), only embedding of the impactor was observed and ejecta production was produced for most impacts at > 20 cm/s. Once at microgravity levels (<10-4g), the lowest impact energies also produced impactor rebound. In these microgravity conditions, ejecta started to be produced for impacts at > 10 cm/s. The measured ejecta speeds were lower than the ones measured at reduced-gravity levels, but the ejected masses were higher. The mean ejecta velocity shows a power-law dependence on the impact energy with an index of ~0.7. When projectile rebound occurred, we observed that its coefficients of restitution on the bed of regolith simulant decrease by a factor of 10 with increasing impact speeds from ~5 cm/s up to 100 cm/s. We could also observe an increased cohesion between the JSC-1 grains compared to the quartz sand targets