New Primary Standards for Establishing SI Traceability for Moisture Measurements in Solid Materials

The article contains the results of the metrological examination and research of the accuracy indicators of a method for diagnosing aircraft gas turbine engines of the D30KU/KP family using an ultra-high-frequency plasma complex. The results of metrological examination of a complete set of regulatory documents related to the diagnostic methodology, and an analysis of the state of metrological support are provided as well. During the metrological examination, the traceability of a measuring instrument (diagnostics) – an ultrahigh-frequency plasma complex – is evaluated based on the scintillation analyzer SAM-DT-01–2. To achieve that, local verification schemes from the state primary standards of the corresponding types of measurements were built. The implementation of measures to eliminate inconsistencies identified during metrological examination allows to reduce to an acceptable level the metrological risks of adverse situations when carrying out aviation activities in industry and air transportation. In addition, the probability of occurrence of errors of the first and second kind in the technological processes of tribodiagnostics of aviation gas turbine engines is reduced when implementing a method that has passed metrological examination in real practice. At the same time, the error in determining ratings and wear indicators provides acceptable accuracy indicators and sufficient reliability in assessing the technical condition of friction units of the D-30KP/KP2/KU/KU-154 aircraft engines.

Apparatus and method for local chemical analyses at the surface of solid materials by spectroscopy of X photoelectrons

Spectrochimica Acta Part A Molecular Spectroscopy ◽

10.1016/0584-8539(90)80127-k ◽

1990 ◽

Vol 46 (3) ◽

pp. ii

Keyword(s):

Chemical Analyses ◽

Solid Materials

Characterization and Quantification of Selenoprotein P: Challenges to Mass Spectrometry

International Journal of Molecular Sciences ◽

10.3390/ijms22126283 ◽

2021 ◽

Vol 22 (12) ◽

pp. 6283

Author(s):

Jérémy Lamarche ◽

Luisa Ronga ◽

Joanna Szpunar ◽

Ryszard Lobinski

Keyword(s):

Mass Spectrometry ◽

State Of The Art ◽

Animal Health ◽

Primary Standard ◽

Selenoprotein P ◽

Primary Standards ◽

Analytical Approaches ◽

Careful Investigation ◽

Accurate Quantification

Selenoprotein P (SELENOP) is an emerging marker of the nutritional status of selenium and of various diseases, however, its chemical characteristics still need to be investigated and methods for its accurate quantitation improved. SELENOP is unique among selenoproteins, as it contains multiple genetically encoded SeCys residues, whereas all the other characterized selenoproteins contain just one. SELENOP occurs in the form of multiple isoforms, truncated species and post-translationally modified variants which are relatively poorly characterized. The accurate quantification of SELENOP is contingent on the availability of specific primary standards and reference methods. Before recombinant SELENOP becomes available to be used as a primary standard, careful investigation of the characteristics of the SELENOP measured by electrospray MS and strict control of the recoveries at the various steps of the analytical procedures are strongly recommended. This review critically discusses the state-of-the-art of analytical approaches to the characterization and quantification of SELENOP. While immunoassays remain the standard for the determination of human and animal health status, because of their speed and simplicity, mass spectrometry techniques offer many attractive and complementary features that are highlighted and critically evaluated.

Extracting maximal objects from three-dimensional solid materials

Computers & Operations Research ◽

10.1016/j.cor.2021.105290 ◽

2021 ◽

pp. 105290

Author(s):

Everton Fernandes Silva ◽

Hatice Çalık ◽

Wim Vancroonenburg ◽

Aline Aparecida Souza Leao ◽

Tony Wauters

Keyword(s):

Three Dimensional ◽

Solid Materials

Estimation of spin contamination errors in DFT/plane-wave calculations of solid materials using approximate spin projection scheme

Chemical Physics Letters ◽

10.1016/j.cplett.2020.138291 ◽

2021 ◽

Vol 765 ◽

pp. 138291

Author(s):

Kohei Tada ◽

Shusuke Yamanaka ◽

Takashi Kawakami ◽

Yasutaka Kitagawa ◽

Mitsutaka Okumura ◽

...

Keyword(s):

Plane Wave ◽

Spin Projection ◽

Solid Materials ◽

Spin Contamination ◽

Projection Scheme

Analysis of Ergonomics in the Reuse and Recycling of Solid Materials in Brazilian Cooperatives

Advances in Intelligent Systems and Computing - Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) ◽

10.1007/978-3-319-96068-5_104 ◽

2018 ◽

pp. 960-969 ◽

Cited By ~ 3

Author(s):

Hebert Roberto da Silva

Keyword(s):

Solid Materials

Dosimetry of High-Energy Photon Beams Based on Standards of Absorbed Dose to Water: Abstract

Journal of the International Commission on Radiation Units and Measurements ◽

10.1093/jicru_1.1.8 ◽

2001 ◽

Vol 1 (1) ◽

pp. 8-8 ◽

Cited By ~ 3

Author(s):

K. Hohlfeld ◽

P. Andreo ◽

O. Mattsson ◽

J. P. Simoen

Keyword(s):

Reference Conditions ◽

International Comparisons ◽

Absorbed Dose ◽

High Energy ◽

National Standards ◽

Photon Radiation ◽

Photon Beams ◽

Radiation Induced ◽

Absorbed Dose To Water ◽

Primary Standards

This report examines the methods by which absorbed dose to water can be determined for photon radiations with maximum energies from approximately 1 MeV to 50 MeV, the beam qualities most commonly used for radiation therapy. The report is primarily concerned with methods of measurement for photon radiation, but many aspects are also relevant to the dosimetry of other therapeutic beams (high-energy electrons, protons, etc.). It deals with methods that are sufficiently precise and well established to be incorporated into the dosimetric measurement chain as primary standards (i.e., methods based on ionisation, radiation-induced chemical changes, and calorimetry using either graphite or water). The report discusses the primary dose standards used in several national standards laboratories and reviews the international comparisons that have been made. The report also describes the reference conditions that are suitable for establishing primary standards and provides a formalism for determining absorbed dose, including a discussion of correction factors needed under conditions other than those used to calibrate an instrument at the standards laboratory.