Filters
Results 1 - 10 of 12258
Results 1 - 10 of 12258.
Search took: 0.043 seconds
Sort by: date | relevance |
AbstractAbstract
[en] After a brief review of the principle of operation and principal calibration characteristics of accelerometers, this article presents in the middle frequency range ie, 5 Hz to 10 kHz, two absolute methods of calibration of their sensitivity. These two methods consist of: a method of interference measurement of the accelerometers displacement which for a given frequency will permit calculation of the resultant level of acceleration; an electrical reciprocity method. They require the measurement of mechanical and electrical levels which can be easily referred to National Standards and the interrelation between their frequency range and their acceleration levels permits their cross-comparison
[fr]
Apres un bref rappel du principe de fonctionnement et des principales caracteristiques metrologiques des capteurs d'acceleration, cet article presente, dans le domaine moyenne frequence (5Hz-10kHz) deux methodes d'etalonnage absolues de leur sensibilite. Ces deux methodes se decomposent en: une methode interferentielle de mesurage du deplacement du capteur a etalonner permettant, connaissant la frequence d'excitation de determiner le niveau d'acceleration applique; une methode electrique de reciprocite. Elles font appel a la mesure de grandeurs mecaniques et electriques susceptibles d'etre raccordees aux etalons nationaux et, elles se recoupent tant dans le domaine des frequences que dans le domaine des niveaux appliques permettant ainsi leur intercomparaisonOriginal Title
Les capteurs d'acceleration moyenne frequence et leurs methodes absolues d'etalonnage
Primary Subject
Record Type
Journal Article
Journal
Bull. Inf. Sci. Tech. (Paris); (no.201); p. 9-14
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Accurate dose measurements is an important parameter to ensure the effective irradiation process. Developments of the accurate dose measurement system and an effective standardization of radiation beam at Unit Tenaga Nuklear are discussed. Emphasis is given on the selection of the suitable dosemeter system, beam standardization and quality control programme to ensure the established system is traceable to the International standards. The dosimeter was supplied to the irradiation plants in Malaysia for monitoring of irradiation process. The measured dose is used as an evident indicating the reliability of accurate irradiation process especially for the product to be exported to other countries
Original Title
Pemiawaian pengukuran-pengukuran dos sinaran
Source
1994; 20 p; National seminar on the assessment of IRPA research achievement in 5th Malaysian Plan: industrial sector; Seminar kebangsaan menilai pencapaian penyelidikan IRPA dalam Rancangan Malaysia ke 5 sektor perindustrian; Kedah (Malaysia); 20-24 Dec 1991
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
Etalonova zarizeni UVVVR reprodukujici jednotku Ci
Primary Subject
Source
Ceskoslovenska Akademie Ved, Prague. Laborator Radiologicke Dozimetrie; p. 138; May 1973; 3. national symposium on radiological dosimetry; Jachymov, Czechoslovakia; 10 Dec 1973; Published in summary form only.
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Ganivet, Michel.
CEA Centre d'Etudes Nucleaires de Cadarache, 13 - Saint-Paul-les-Durance (France). Dept. de Developpement des Elements Combustibles1975
CEA Centre d'Etudes Nucleaires de Cadarache, 13 - Saint-Paul-les-Durance (France). Dept. de Developpement des Elements Combustibles1975
AbstractAbstract
[en] The fabrication, conditioning and analytical checking of a series of Pu metal standards realized by the ''Commission d'Etablissement des Methodes d'Analyses'' at the CEA, are described. They can be employed for the calibration of the chemical and physical determination methods of Pu and used as calibration standards in the analysis of traces. The results obtained are given
[fr]
Pour l'etalonnage de methodes chimiques du dosage du plutonium et de certaines methodes physiques telle que la calorimetrie, et pour disposer d'un materiau tres pur servant de reference pour le dosage de traces, la Commission d'Etablissement des Methodes d'Analyses du Commissariat a l'Energie Atomique a entrepris la fabrication, le conditionnement et la verification analytique d'un lot d'echantillon de reference de plutonium metallique. Ces differentes etapes sont decrites, les resultats obtenus exposes et un tableau des valeurs les plus probables pour ce materiau est donneOriginal Title
Le plutonium metal, materiau de reference
Primary Subject
Source
1975; 3 p; Meeting 1975 on metrology: standard materials; Epernay, France; 22 Oct 1975
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Shull, A.H.
Westinghouse Savannah River Co., Aiken, SC (United States). Funding organisation: USDOE, Washington, DC (United States)1997
Westinghouse Savannah River Co., Aiken, SC (United States). Funding organisation: USDOE, Washington, DC (United States)1997
AbstractAbstract
[en] An essential part of any measurement control program is adequate knowledge of the uncertainties of the measurement system standards. Only with an estimate of the standards'' uncertainties can one determine if the standard is adequate for its intended use or can one calculate the total uncertainty of the measurement process. Purchased standards usually have estimates of uncertainty on their certificates. However, when standards are prepared and characterized by a laboratory, variance propagation is required to estimate the uncertainty of the standard. Traditional variance propagation typically involves tedious use of partial derivatives, unfriendly software and the availability of statistical expertise. As a result, the uncertainty of prepared standards is often not determined or determined incorrectly. For situations meeting stated assumptions, easier shortcut methods of estimation are now available which eliminate the need for partial derivatives and require only a spreadsheet or calculator. A system of simplifying the calculations by dividing into subgroups of absolute and relative uncertainties is utilized. These methods also incorporate the International Standards Organization (ISO) concepts for combining systematic and random uncertainties as published in their Guide to the Expression of Measurement Uncertainty. Details of the simplified methods and examples of their use are included in the paper
Secondary Subject
Source
9 Jun 1997; 6 p; 38. annual meeting of the Institute of Nuclear Materials management; Phoenix, AZ (United States); 20-24 Jul 1997; CONF-970744--28; CONTRACT AC09-89SR18035; Also available from OSTI as DE97053862; NTIS; US Govt. Printing Office Dep
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
O metrologicheskoj aktivnosti Instituta yadernykn issledovanij im. Borisa Kidricha
Primary Subject
Source
Sovet Ehkonomicheskoj Vzaimopomoshchi, Moscow (USSR). Postoyanniya Komissiya po Ispol'zovaniyu Atomnoj Ehnergii v Mirnykh Tselyakh; p. 296; 1979; p. 296; International symposium on methods of production and measurement of standard sources and solutions; Marianske Lazne (Czechoslovakia); 15-18 May 1979; Text of paper to be published separatelly in ''Radioizotopy'' bulletine.
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Solid, unquenched, radiophosphorescent standards for use in the day-to-day calibration of bottom viewing photometers (luminometers) were prepared by encapsulating commercially-available phosphor powders that are excited to phosphoresce by the β- decay of 63Ni (t0.5 = 96 yr) or 14C (t0.5 = 5730 yr). The encapsulated photometer standards have remained mechanically and photometrically stable since their fabrication, which in some cases is 3 years ago. An equivalent level of visible luminescence emitted from the standards of up to 2.3 x 1010 photons.s-1 was achieved by using an appropriate amount of radioactivity and the proper phosphor. The phosphor used in the standards could be chosen such that the radiophosphorescence emission spectrum corresponded approximately to the chemiluminescence or bioluminescence spectrum under investigation. (author)
Primary Subject
Source
GRANTS N-00014-83-C-0614; DMB-85-12361
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Thurston, W.M.; James, M.W.D.
Atomic Energy of Canada Ltd., Chalk River, Ontario. Chalk River Nuclear Labs1984
Atomic Energy of Canada Ltd., Chalk River, Ontario. Chalk River Nuclear Labs1984
AbstractAbstract
[en] The D2O concentration of the Canadian Primary Standard has been reviewed and an accurate redetermination of the deuterium content has been made using the absolute method recently developed at CRNL. A new value of 99.9720 +- 0.0006 wt percent has been determined and its use is recommended. On and after November 1, 1984 the assigned concentration values of secondary standards based on the Canadian Primary Standard should be changed correspondingly as should the value for heavy water in reactors and inventory and the associated reactor grade specifications. The new value of the Canadian Primary Standard is in good agreement with results from international intercomparisons, is directly established with absolute determinations, and is easily verifiable in the future. An appendix describes a container which facilitates intercomparisons and long term storage of standards and their handling in interlaboratory comparisons
Primary Subject
Secondary Subject
Source
Aug 1984; 16 p
Record Type
Report
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Ball, M.H.E.; Marshall, I.A.; Mitchell, J.P.; Rideal, G.
UKAEA Atomic Energy Establishment, Winfrith (UK). Chemistry Div1989
UKAEA Atomic Energy Establishment, Winfrith (UK). Chemistry Div1989
AbstractAbstract
[en] Polydisperse, non-porous microspheres are required with well-defined aerodynamic properties to determine if enhanced settling of micron-sized aerosol particles occurs in the presence of larger particles (gravitational agglomeration). Glass spheres with claimed unimodal narrow distributions were evaluated using a TSI Aerodynamic Particle Sizer (APS33B). The size fractions containing particles in the range from 1 to 5 μm aerodynamic diameter were truly unimodal, but the fractions which were supposed to consist solely of particles larger than 5 μm aerodynamic diameter contained a significant proportion of submicron particles. (author)
Primary Subject
Source
Aug 1989; 23 p
Record Type
Report
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
Feher, I. (ed.); Hungarian Academy of Sciences, Budapest. Central Research Inst. for Physics; 60 p; ISBN 963-372-383-3;
; Oct 1985; p. 26; Computer aided methods in radiation protection; Budapest (Hungary); 22-25 Oct 1985; Published in summary form only.

Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |