491 research outputs found
The tone range/telemetry interferometer tracking system for support of sounding rocket payloads
Combined range rate and telemetric interferometer system for radar tracking of scientific sounding rocket
The Impact of Reducing Full Time Support Positions in the U.S. Army National Guard and Reserves
The United States Army is at a point in its history in which it, along with the other branches of the military, are experiencing cuts, constraints and a tightening of resources. The days of seemingly large budgets, abundant financial resources and high amounts of manpower are becoming a thing of the past. As the government reduces the allocations to the military, it is examining ways to reduce costs and improve its financial prospects. One of the positions examined for reduction or outright elimination is the full time support position in the U.S. Army National Guard (ARNG) and Reserves (USAR). The purpose of this research endeavor is to quantify the impact that these positions have on the ARNG and the USAR and determine the amount of risk associated with either reducing or eliminating them
Correspondence between alternate measures of maladaptive exercise, and their associations with disordered eating symptomatology
Aims:
The study sought to contribute to the measurement of maladaptive exercise by examining the psychometric properties of a variety of instruments and classification algorithms. The primary aim was to identify the items or scales necessary and sufficient to quantify the construct. A secondary aim was to comment on the construct validity of these measures by examining their relationships with disordered eating symptomatology.
Methods:
Questionnaire booklets comprising the Exercise Dependence Scale, the Obligatory Exercise Questionnaire, the Frequency, Intensity, Time Index, and the Eating Attitudes Test were distributed to women attending health and fitness centres. Self-reported age, height, current and desired weight, and length of time as a regular exerciser were also sought. Data were obtained from 302 regular exercisers.
Results:
While there were statistically significant associations among the measures, no two operationalised maladaptive exercise in the same manner. The Frequency-Intensity-Time Index (FIT) was found to be particularly poor. While variation in the size of relationships between maladaptive exercise and disordered eating was noted, all measures were strongly correlated with the exception of FIT, which demonstrated a modest correlation.
Conclusions:
Different conceptualisations of maladaptive exercise have led to alternative operational definitions, resulting in its classification being instrument dependent. Further exploration using samples with differing characteristics (e.g., high/low probability of dependence) may allow more specific recommendations to be made about the optimal measurement of maladaptive exercise. Further, the question of whether maladaptive exercise is more likely a cause or consequence of eating disorders remains
Exploring the Incremental Validity of Nonverbal Social Aggression: The Utility of Peer Nominations
This study examined the construct validity of nonverbal social aggression and the relation of nonverbal social aggression to dimensions of children’s social status. Peer nominations of verbal social, nonverbal social, direct verbal, and physical aggression, as well as social dominance, perceived popularity, and social acceptance, were collected from 459 elementary students. Structural equation modeling with physical and direct verbal aggression items and verbal and nonverbal social aggression items yielded three factors of aggression: overt, nonverbal social, and verbal social. Subsequent analyses indicated that girls are more nonverbally socially aggressive than boys. Nonverbal social aggression was found to explain unique variance in social acceptance for boys and to offer equal contributions to girls’ social dominance and perceived popularity, controlling for overt and verbal social aggression. Suggestions for future research are discussed
Some Observations on the Germicidal Efficiencies of Alkalies
A technique is described for measuring the relative germicidal efficiencies of strong alakalies. For a given alkali, the germicidal efficiency increases with decreasing H +ion concentration, but the H +ion concentration is not suitable as an index of the germicidal powers of different alkalies. The addition of various salts to sodium hydroxide increased the germicidal effects of the alkali
Pace and Process of Active Folding and Fluvial Incision Across the Kantishna Hills Anticline, Central Alaska
Rates of northern Alaska Range thrust system deformation are poorly constrained. Shortening at the system\u27s west end is focused on the Kantishna Hills anticline. Where the McKinley River cuts across the anticline, the landscape records both Late Pleistocene deformation and climatic change. New optically stimulated luminescence and cosmogenic 10Be depth profile dates of three McKinley River terrace levels (~22, ~18, and ~14–9 ka) match independently determined ages of local glacial maxima, consistent with climate-driven terrace formation. Terrace ages quantify rates of differential bedrock incision, uplift, and shortening based on fault depth inferred from microseismicity. Differential rock uplift and incision (≤1.4 m/kyr) drive significant channel width narrowing in response to ongoing folding at a shortening rate of ~1.2 m/kyr. Our results constrain northern Alaska Range thrust system deformation rates, and elucidate superimposed landscape responses to Late Pleistocene climate change and active folding with broad geomorphic implications
Chronic lung allograft dysfunction: Definition, diagnostic criteria, and approaches to treatment―A consensus report from the Pulmonary Council of the ISHLT
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