Algebraic Monte Carlo precedure reduces statistical analysis time and cost factors

Algebraic Monte Carlo procedure statistically analyzes performance parameters in large, complex systems. The individual effects of input variables can be isolated and individual input statistics can be changed without having to repeat the entire analysis

Commercialization of the land remote sensing system: An examination of mechanisms and issues

In September 1982 the Secretary of Commerce was authorized (by Title II of H.R. 5890 of the 97th Congress) to plan and provide for the management and operation of the civil land remote sensing satellite systems, to provide for user fees, and to plan for the transfer of the ownership and operation of future civil operational land remote sensing satellite systems to the private sector. As part of the planning for transfer, a number of approaches were to be compared including wholly private ownership and operation of the system by an entity competitively selected, mixed government/private ownership and operation, and a legislatively-chartered privately-owned corporation. The results of an analysis and comparison of a limited number of financial and organizational approaches for either transfer of the ownership and operation of the civil operational land remote sensing program to the private sector or government retention are presented

File Editing on the HP3000 for the SEDIMOT II Computer Model

Since the release of the SEDIMOT II model, the Agricultural Engineering Department has taught approximately 300 consulting and mining engineers, reclamation specialists, government agency personnel, and academia. The program is being used on all types of computer systems, company owned as well as time sharing vendors. Over 50 firms are using the HP3000 system of the College of Agriculture at the University of Kentucky under arrangements with the Institute for Mining and Minerals Research, Office of Informational Services and Technical Liaison

Global Positioning System Applications

The space-based Navstar Global Positioning System (GPS), which is scheduled to achieve full operational status by late 1988, will consist of 18 active satellites placed around six orbital rings at 10,898 nautical miles above the earth. Every other ring will contain an extra satellite that will function as an active on-orbit spare. This regular and precise constellation of GPS satellites will provide continuous, three-dimensional global navigation coverage to users worldwide. Average positioning accuracies of 15 meters or less are anticipated by the military. This extraordinary precision has been demonstrated repeatedly under field-test conditions in both the United States and Western Europe. Other tests indicate that relative (differential) navigation, which employs user sets rigged to communicate their navigation solution to one another, can achieve substantially better results. Relative errors of only 1 or 2 meters have been demonstrated with existing equipment under realistic field-test conditions

Phosphorylation of CENP-A on serine 7 does not control centromere function

CENP-A is the histone H3 variant necessary to specify the location of all eukaryotic centromeres via its CENP-A targeting domain and either one of its terminal regions. In humans, several post-translational modifications occur on CENP-A, but their role in centromere function remains controversial. One of these modifications of CENP-A, phosphorylation on serine 7, has been proposed to control centromere assembly and function. Here, using gene targeting at both endogenous CENP-A alleles and gene replacement in human cells, we demonstrate that a CENP-A variant that cannot be phosphorylated at serine 7 maintains correct CENP-C recruitment, faithful chromosome segregation and long-term cell viability. Thus, we conclude that phosphorylation of CENP-A on serine 7 is dispensable to maintain correct centromere dynamics and function

Immobile Water Content and Mass Exchange Coefficient of a Field Soil

Determining the preferential flow characteristics of a soil is important because agrichemicals can contaminate groundwater via preferential flow pathways. A model that predicts solute transport due to preferential flow is the mobile-immobile solute transport model, which partitions the total water content (θ, m3 m−3) into a mobile fraction (θm) and an immobile fraction (θim). Recently, an in situ method was proposed for determining the mobile-immobile model parameters of θim and mass exchange coefficient (α) between the fractions by using a tension infiltrometer to apply a series of four fluorobenzoate tracers. The objective of this study was to test the in situ technique at 47 sites along a transect in a ridge-till corn (Zea mays L.) field of Nicollet soil (fine-loamy, mixed, mesic Aquic Hapludoll). The immobile fraction (θim /θ) ranged from 0.394 to 0.952 with a median of 0.622. The mass exchange coefficient ranged from 0.000237 to 0.00481 min−1 with a median of 0.00123 min−1. These values are similar in magnitude and range to values reported by other investigators, and they follow the same relationships. The values of θim/θ and α along the transect indicated no obvious spatial trends or spatial correlations. Significant linear correlations did exist between α and soil water flux, α and θim, and θ and θim

The Relationship among Caregiver Depressive Symptoms, Parenting Behavior, and Familycenter Care All

Background Parental depression has been associated with adverse child outcomes. However, the specific parenting behaviors that may result in such child outcomes and the effect of family-centered care (FCC) on positive parenting behavior of depressed parents has not previously been examined. Methods Data from the National Survey of Early Childhood Health was used (n = 2,068). Groups were stratified by the presence of parental depression and compared with regard to demographics and the mean number of specific positive parenting behaviors. Generalized linear models were developed based on testing whether individuals performed more or less than the median number of positive behaviors. Lastly, we tested whether depression independently predicted each outcome after adjustment for FCC, coping, social support, and ethnicity to evaluate if depression independently predicted each outcome after adjustment. Results No difference was found in demographic variables between parents who were depressed and not depressed. Parents who were not depressed performed significantly more routines (p = .036); reported coping better with parenting (p < .001); performed significantly less punitive behaviors (p = .022); and needed/had less social support (p = .002) compared with parents who were depressed. Individual items and scale scores were associated in the expected directions. FCC was independently associated with study variables but did not moderate the effect of depression. Conclusions These data identify specific parenting behaviors that differ between parents who report depressive symptoms compared with parents who do not have depressive symptoms. More targeted interventions coordinated through a medical home are needed for parents with depressive symptoms to reduce the child health disparities often associated with parental depression