Zür Qualitäserhaltung dünnschaliger Kartoffeln durch Rütgenstrahlen niederer Dosis

European Food Research and Technology - Dünsschalige Kartoffeln der Sorten ?Bona” und ?Heida” wurden unmittelbar nach der Rodung in einer besonderen...     

Radiation from sources in the presence of a flat earth

The authors call attention to the equivalence between Sommerfeld's formulation for an oscillating dipole and the result based on the dyadic Green function technique. The complication resulting from the use of the set of the longitudinal vector wave functions in formulating electromagnetic problems is also pointed out     

Pre-Reduced Iron-ore Pellets,their Experimental Preparation

A super blast-furnace feed-hard pre-reduced pellets-has been the objective of small-scale experimental work by the US Bureau of Mines. Results have been sufficiently promising to continue research to develop a continuous production method.     

Special Feature A Keynote Address on Concurrent Programming

Delivered at COMPSAC 78, this address draws a parallel between the major development phases of the first 20 years of concurrent programming and the present challenge of distributed computing.     

Attributes and attributions: Inferring stimulus properties, actors' dispositions, and causes.

Actors' and observers' use of sample base-rate data was explored in 3 experiments with a total of 176 undergraduates. Observers used sample base rates to infer the properties of actors' environments and, by comparing actors' behaviors with sample performance, the actors' attributes. Actors, on the other hand, ignored sample base rates when inferring the properties of stimuli to which they were responding but, surprisingly, used base rates to infer their own attributes. Observers' causal attributions were more sensitive to base-rate information than were actors'. In Exps I and II, actors attributed their behavior to environmental properties even though their behavior was always discrepant from that of the sample. Observers, on the other hand, attributed actors' nonnormative behavior to actors' dispositions. In Exp III, observers attributed actors' behavior more to stimulus attributes and less to actors' attributes when the behavior was similar to (normative) rather than discrepant from (nonnormative) that of the sample. Actors' attributions were not influenced by the consensus manipulation. Data are discussed in terms of the research and theory on the informativeness of consensus. (20 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Radioactive products from boron CTR reactions

The nuclear reaction rates for ¹⁰B(p, α)⁷Be and ¹⁰B(p, γ)¹¹C have been measured by a thick target technique using proton energies from 75 keV to 3.0 MeV. The results are valid for proton temperatures near 3 · 10⁹K where the ¹¹B(p, 3α) reaction has been suggested for power generation. At this temperature, the rates N_A〈συ〉 are 2.66 · 10₇ and 8.3 · 10² cm³ g^?1 s^?1 for ⁷Be and ¹¹C, respectively. As such, these rates suggest the possibility of serious radioactive contamination in using natural boron as a fuel in CTR devices.     

Crosspolarised radiation from waveguides and narrow-angle horns

Radiation from circular waveguides and narrow-angle cones is obtained numerically and their crosspolarised radiation is presented. It is found that the peak crosspolarised radiation is generally a sensitive function of wall thickness, aperture diameter and overall length of the waveguide.     

RDX biodegradation column study: comparison of electron donors for biologically induced reductive transformation in groundwater

A series of column studies, using site-specific soil and groundwater, were conducted to determine the feasibility of biologically active zone enhancement (BAZE) process for reductive biotransformation of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) in groundwater. This treatability study examined the use of four amendments (acetate, ethanol, soluble starch, and acetate plus ammonium), which served as electron donors. Triplicate columns, with groundwater residence time of about 27.5 h, were used for each amendment treatment and the amendment control. In treatment columns amendment dosing was 500 mg/L C for carbon sources and 100 mg/L N for ammonium. Each of the amendment treatments reduced RDX inlet concentrations of 100 microg/L to less than 1 microg/L. The highest first-order RDX biodegradation rate ranged between 0.140 and 0.447 h(-1) for acetate amended columns as compared to 0.037 to 0.083 h(-1) in control columns (no amendment). The addition of soluble starch resulted in increased toxicity (based on Microtox analysis) that was partially removed by biological activity in the columns. Ethanol addition itself did not result in increased toxicity but biological activity in this system did induce Microtox toxicity. Acetate did not have any Microtox toxicity associated with it. The addition of ammonium as a nitrogen source did not significantly increase the removal rate of RDX. Based on these observations acetate was selected for the field demonstration.