7,913 research outputs found
Slaying the dragon: mythmaking in the biblical tradition
Reviewed Book: Batto, Bernard F. Slaying the dragon: mythmaking in the biblical tradition. Louisville, Ky: Westminster/John Knox Press, 1992
Indian Horse
Title: Indian Horse. Author: By Richard Wagamese. Publisher: Vancouver: Douglas and MacIntyre, 2012. ISBN: 978155365402
Horizontal branch stars, and galactic and magellanic cloud globular clusters
Seven blue horizontal branch stars in the field were observed and a few HB stars were isolated in globular clusters. Energy distributions are compared to assess possible differences and also used in comparison with model atmospheres. Observed energy distributions of HB stars in NGC 6397 are used to estimate the total number of HB stars which produced the integrated fluxes as observed by ANS. Preliminary results are given for colors of globular clusters observed in the Magellanic Clouds and for their extent, based on the Washburn IUE extraction
RISK MANAGEMENT POTENTIAL OF PRECISION FARMING TECHNOLOGIES
Initial ideas on risk management uses of precision agricultural technology focused on site-specific treatment of problem areas to reduce the probability of low yields and returns. Recent discussions deal with sensor and remote-sensing information to improve marketing and "as applied maps" as trace-back mechanisms to manage liability. A theoretical model is presented that suggests that there are plausible circumstances under which precision farming can reduce temporal yield variability. Empirical evidence from an on-farm trial of site-specific P&K management in the Eastern Cornbelt supports the hypothesis that precision farming can have risk-reducing benefits.food safety, GIS, GPS, crop insurance, marketing, precision farming, site specific management, risk, Research and Development/Tech Change/Emerging Technologies, Risk and Uncertainty,
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In Their Own Words: Using Siblings’ Meanings about Daily Family Interaction to Understand the Influence of a Child with a Developmental Disability on the Sibling Experience
This study examined daily experiences of stress and coping among adolescent siblings of children with developmental disabilities. Early studies of this population have assumed that living with a disabled sibling is inherently stressful due to changes in the availability and allocation of familial resources. While recent work suggests that only a minority of nondisabled youth experience considerable stress related to family interactions involving a disabled sibling, few studies offer an understanding of how nondisabled siblings make meaning of their experiences and their attempts to cope with them. As such, we have a poor understanding of why some nondisabled siblings struggle while others do not. To address this gap in the literature, I drew on models of stress and coping to conduct a qualitative exploration of the cognitive appraisals used by nondisabled siblings during stressful family interactions. I conducted in-depth individual interviews with 11 nondisabled siblings (aged 10 to 17 years old) to elicit their descriptions of daily family interactions. The interviews were composed of audio-recorded dinner conversations and emotion maps as well as open-ended questions to elicit candid and detailed accounts of family life. Analyses of participants’ appraisal processes addressed the following questions: which aspects of daily family interactions they experienced as stressful and why they were appraised as stressful, how the participants attempted to manage these stressful interactions and why they chose particular coping behaviors and resources, and how their coordination of these appraisals were associated with their subsequent distress. The findings present three important clinical and research implications, including the importance of considering nondisabled siblings’ appraisals of stressful family interactions in clinical practice and research, the need to expand nondisabled siblings’ coping behaviors and resources for managing daily family-related stress, and the role of parents in nondisabled siblings’ experiences of stress
PRECISION AGRICULTURE: ECONOMICS OF NITROGEN MANAGEMENT IN CORN USING SITE-SPECIFIC CROP RESPONSE ESTIMATES FROM A SPATIAL REGRESSION MODEL
Adapting variable rate technology (VRT) to Argentine conditions requires methods that use inexpensive information and that focus on the inputs and variability common to Argentine maize and soybean growing areas. The goal of this study is to determine if spatial regression analysis of yield monitor data can be used to estimate the site-specific crop Nitrogen (N) response needed to fine tune variable rate fertilizer strategies. N has been chosen as the focus of this study because it is the most commonly used fertilizer by corn farmers in Argentina. The methodology uses yield monitor data from on-farm trials to estimate site-specific crop response functions. The design involves a strip trial with a uniform N rate along the strip and a randomized complete block design, with regression estimation of N response curves by landscape position. Spatial autocorrelation and spatial heterogeneity are taken into account using a spatial error model and a groupwise heteroskedasticity model. A partial budget is used to calculate uniform rate and VRT returns. First year data indicate that N response differs significantly by landscape position, and that VRA for N may be modestly profitable on some locations depending on the VRT fee level, compared to a uniform rate of urea of 80kg ha-1. A more complete analysis will pool data over many farms and several years to determine if reliable differences exist in N response by landscape position or other type of management zone. The study is planned for four years. The purpose of this preliminary analysis is to show how spatial regression analysis of yield data could be used to fine tune input use.Crop Production/Industries,
John Calvin, the Civil Magistrate, Law, and the Natural Law: Exploring Calvin\u27s Understanding
Using Spatial Analysis to Study the Values of Variable Rate Technology and Information
We present a review of the last few years' literature on the economic feasibility of variable rate technology in agriculture. Much of the research on this topic has involved the estimation of site-specific yield response functions. Data used for such estimations most often inherently lend themselves to spatial analysis. We discuss the different types of spatial analyses that may be appropriate in estimating various types yield response functions. Then, we present a taxonomy for the discussion of the economics of precision agriculture technology and information. We argue that precision agriculture technology and information must be studied together since they are by nature economic complements. We contend that longer-term, multi-location agronomic experiments are needed for the estimation of ex ante optimal variable input rates and the expected profitability of variable rate technology and information gathering. We use our taxonomy to review the literature and its results with consistency and rigor.precision agriculture, spatial econometrics, variable rate technology, Research and Development/Tech Change/Emerging Technologies, C31, O33, Q16,
Supramolecular Assembly of Ag(I) Centers: Diverse Topologies Directed by Anionic Interactions.
Ag(I)-Ag(I) interactions in supramolecular structures have been achieved through the use of structural support from the ligand frames. In structures involving simple ligands like pyridine, strong π-π interaction leads to spatial ordering of the individual [Ag(L)2]+ units. In such structures anions also play a crucial role in dictating the final arrangement of the [Ag(L)2]+ synthons. In order to determine whether the anions can solely dictate the arrangement of the [Ag(L)2]+ synthons in the supramolecular structure, four Ag(I) complexes of 4-pyridylcarbinol (PyOH), namely, [Ag(PyOH)2]X (X = NO3- (1), BF4- (2), CF3SO3- (3), and ClO4- (4)) have been synthesized and structurally characterized. Gradual transformation of the extended structures observed in 1-3 eventually merges into a unique linear alignment of the [Ag(PyOH)2]+ units in 4 along the c axis, a feature that results in strong argentophilic interactions. Complex 4 is sensitive to light and is inherently less stable than the other three analogues. The structural variations in this set of extended assemblies are solely dictated by the anions, since π-π interaction between the substituted pyridine ligands is significantly diminished due to disposition of the -CH2OH substituent at the 4 position and H-bonding throughout the structure
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