81 research outputs found
Planar Quarter Wave Stack Reflectors Prepared from Chalcogenide Ge-Se and Polymer Polystyrene Thin Films
Spectrum standardization for laser-induced breakdown spectroscopy measurements
This paper presents a spectra normalization method for laser-induced
breakdown spectroscopy (LIBS) measurements by converting the recorded
characteristic line intensity at varying conditions to the intensity under a
standard condition with standard plasma temperature, degree of ionization, and
total number density of the interested species to reduce the measurement
uncertainty. The characteristic line intensities of the interested species are
first converted to the intensity at a fixed temperature and standard degree of
ionization but varying total number density for each laser pulse analysis.
Under this state, if the influence of the variation of plasma morphology is
neglected, the sum of multiple spectral line intensities for the measured
element can be regarded proportional to the total number density of the
specific element, and the fluctuation of the total number density, or the
variation of ablation mass, was compensated for by the application of this
relationship. In the experiments with 29 brass alloy samples, the application
of this method to determine Cu concentration shows a significant improvement
over generally applied normalization method for measurement precision and
accuracy. The average RSD value, average value of the error bar, R2, RMSEP, and
average value of the maximum relative error were: 5.29%, 0.68%, 0.98, 2.72%,
16.97%, respectively, while the above parameter values for normalization with
the whole spectrum area were: 8.61%, 1.37%, 0.95, 3.28%, 29.19%, respectively.Comment: LIBS; Normalization; quantitative measurement; plasma propert
Three individuals, three stories, three burials from medieval Trondheim, Norway
This article presents the life stories of three individuals who lived in Trondheim, Norway, dur- ing the 13th century. Based on skeletal examinations, facial reconstructions, genetic analy- ses, and stable oxygen isotope analyses, the birthplace, mobility, ancestry, pathology, and physical appearance of these people are presented. The stories are discussed within the relevant historical context. These three people would have been ordinary citizens, without any privileges out of the ordinary, which makes them quite rare in the academic literature. Through the study of individuals one gets a unique look into the Norwegian medieval society
ON A PRESUMABLY PLEISTOCENE HUMAN TOOTH FROM THE SJARA-OSSO-GOL (SOUTH-EASTERN ORDOS) DEPOSITS*.
The design of a parallax-correcting anthropometer for replication in nonspecialized machine shops
COMPLETE ABSENCE OF THE SUPRASCAPULAR NOTCH: A RISK FACTOR FOR SUPRASCAPULAR NERVE ENTRAPMENT NEUROPATHY
Tu1141 Mucosal Healing of Small Bowel Crohn's Disease After Anti-TNFα Therapy Assessed by Capsule Endoscopy
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