Authors:A. Sheikhi-Garjan, A. Hosseini-Gharalari, M. Mahjob, M. Rashid, Q. Sabahi, M. Safari, F. Jalilyan and R. Arbabtafti
accuracy and spray coverage evaluation . Appl. Eng. Agric. , 10 , 463 – 470 .
Donskoff , M. ( 1996 ): Prospects for international cooperation of Sunn Pest research and control . FAO Plant Production and Protection Paper, Rome, Italy, No. , 138
In this short communication, a recent article published in the Journal of Thermal Analysis and Calorimetry, which presents
an erroneous conclusion based on incorrect calculations, is critically discussed. Since the observations made in that report
are based on part of the content of a publication of my authorship, trying to reject some expressions I presented, obviously
it came to my attention. This brief note emphasizes that some of the arguments used and the main conclusion stressed in the
manuscript under discussion are wrong and must be dismissed.
in the processing of proprioceptive stimuli, for example, with respect to its accuracy ( 13 ).
A number of methods have been developed to measure various aspects of proprioceptive acuity or accuracy. Concerning the position of the joints, one
There are two components involved in evaluating age by luminescence. One is the equivalent dose determined from luminescence measurements on mineral crystals (usually quartz or feldspar) extracted from the material to be dated. The other is the dose rate to which the crystals have been exposed throughout antiquity. The age is then the ratio (equivalent dose)/(dose rate). Factors which influence the accuracy of the two components, and so the accuracy of the age, are discussed. Limiting factors are identified in order to recognize aspects of measurement on which future development must concentrate to achieve an improvement in accuracy of age determination.
issue recommendations. In “ Checking similarity measures against researchers’ perception of relatedness ” section, we define an evaluation protocol for measuring the accuracy of recommendations according to researchers’ perception. It allows us to assess
An INAA procedure for routine analysis of rock samples is described. Samples are irradiated using a rotating sample holder.
Measurement of the induced gamma activity is performed using an automatic gamma spectrometer and the elemental concentrations
are calculated by a computer. The analytical error is discussed and the precision and accuracy evaluated experimentally. An
average error of ±3–5% without considering counting statistics is obtained. Results for 19 elements in 8 international standard
rocks are reported. A short discussion of the cost of the analysis is included.
Citations in five leading environmental science journals were examined for accuracy. 24.41% of the 2,650 citations checked
were found to contain errors. The largest category of errors was in the author field. Of the five journals Conservation Biology
had the lowest percentage of citations with errors and Climatic Change had the highest. Of the citations with errors that
could be checked in Web of Science, 18.18% of the errors caused a search for the cited article to fail. Citations containing
electronic links had fewer errors than those without.
Analytical chemists are scientific scavengers, using any available physical phenomenon to determine the composition of materials.
Accuracy, unlike mere reproducibility, depends on understanding the measurement process, most usefully by stressing it until
it bends. The use of neutron capture gamma rays for analysis involves some issues not encountered in conventional neutron
activation analysis which, when understood, extend the utility and reinforce the value of nuclear methods of elemental analysis.
These methods are being increasingly recognized as tools for SI-traceable metrology.
Authors:F. De Corte, A. Simonits, A. De Wispelaere and J. Hoste
The present paper deals with the accuracy and applicability of the k0-standardization technique in NAA. Topics included are: user-oriented outline of the method, relevant nuclear data (k0, Q0, tc.), the non-1/E epithermal flux distribution, small detector separations and/or extended source geometries, (n, ) reactions with a Westcott-g1, primary interferences, subsequent (interrupted) irradiations, the non-constancy of the neutron flux during irradiation, and a final account of the accuracy. Although the paper is written in terms of the k0-methodology, a good deal of the considerations can be transferred to most types of single-comparator standardization.