Metrologia最新文献_第3页

Key comparison BIPM.RI(I)-K8 of high dose-rate 192Ir brachytherapy standards for reference air kerma rate of the VSL and the BIPM 高剂量率 192Ir 近距离放射治疗标准 BIPM.RI(I)-K8 与 VSL 和 BIPM 的参考空气灼烧率的关键比较

IF 2.4 3区工程技术

Metrologia Pub Date : 2024-07-30 DOI: 10.1088/0026-1394/61/1a/06010

C Kessler, B J Jansen, J A de Pooter, P Aviles Lucas

引用次数: 0

Supplementary comparison of the measurement of current transformers (CTs) 电流互感器 (CT) 测量的补充比较

IF 2.4 3区工程技术

Metrologia Pub Date : 2024-07-29 DOI: 10.1088/0026-1394/61/1a/01006

A A Akhmeev, E V Voronskay, V N Kikalo, E V Melkumyan, O Dzhasinbekov, G Gantumur, D M Volozhinskii

{"title":"Supplementary comparison of the measurement of current transformers (CTs)","authors":"A A Akhmeev, E V Voronskay, V N Kikalo, E V Melkumyan, O Dzhasinbekov, G Gantumur, D M Volozhinskii","doi":"10.1088/0026-1394/61/1a/01006","DOIUrl":"https://doi.org/10.1088/0026-1394/61/1a/01006","url":null,"abstract":"<title>Main text</title>The purpose of conducting comparison COOMET.EM-S22 of reference measuring systems of the AC current ratio of national metrological institutes (NMIs) is to determine the degree of consistency of national standards among themselves in the participating countries.Six NMIs participated in the supplementary comparison COOMET.EM-S22. Affiliated Branch of D I Mendeleev Institute for Metrology (VNIIM-UNIIM), Russian Federation, acted as the coordinating laboratory of the comparison.The comparisons were carried out by comparing the measurement results of the characteristics of measuring current transformers (CTs), namely, the units of the coefficient and the angle of the scale conversion of the sinusoidal current at a frequency of 50 Hz.To reach the main text of this paper, click on <ext-link xlink:href=\"https://www.bipm.org/documents/d/guest/coomet-em-s22\" xlink:type=\"simple\">Final Report</ext-link>. Note that this text is that which appears in Appendix B of the BIPM key comparison database <ext-link xlink:href=\"https://www.bipm.org/kcdb/\" xlink:type=\"simple\">https://www.bipm.org/kcdb/</ext-link>.The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).","PeriodicalId":18444,"journal":{"name":"Metrologia","volume":"45 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141865491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum plasmonic sensing by Hong–Ou–Mandel interferometry 利用洪欧-曼德尔干涉测量法进行量子等离子传感

IF 2.4 3区工程技术

Metrologia Pub Date : 2024-07-24 DOI: 10.1088/1681-7575/ad61ea

Seungjin Yoon, Yu Sung Choi, Mark Tame, Jae Woong Yoon, Sergey V Polyakov and Changhyoup Lee

引用次数: 0

Letter case pairs for SI prefix symbols SI 前缀符号的字母大小写对

IF 2.4 3区工程技术

Metrologia Pub Date : 2024-07-23 DOI: 10.1088/1681-7575/ad6324

Richard J C Brown

引用次数: 0

Speed of sound measurements and derived third and fourth acoustic virial coefficients of supercritical neon 超临界氖的声速测量和推导出的第三和第四声学病毒系数

IF 2.4 3区工程技术

Metrologia Pub Date : 2024-07-10 DOI: 10.1088/1681-7575/ad58e6

Tobias Dietl, Ahmed El Hawary, Roberto M Gavioso, Robert Hellmann and Karsten Meier

引用次数: 0

Discussion on the calculation of the uncertainties of [UTC-UTC(k)] 关于[UTC-UTC(k)]不确定性计算的讨论

IF 2.4 3区工程技术

Metrologia Pub Date : 2024-06-30 DOI: 10.1088/1681-7575/ad59ac

G Petit and G Panfilo

引用次数: 0

Flexures for Kibble balances: minimizing the effects of anelastic relaxation 用于 Kibble 平衡的挠性：尽量减少弹性松弛的影响

IF 2.4 3区工程技术

Metrologia Pub Date : 2024-06-30 DOI: 10.1088/1681-7575/ad57cb

Lorenz Keck, Stephan Schlamminger, René Theska, Frank Seifert and Darine Haddad

{"title":"Flexures for Kibble balances: minimizing the effects of anelastic relaxation","authors":"Lorenz Keck, Stephan Schlamminger, René Theska, Frank Seifert and Darine Haddad","doi":"10.1088/1681-7575/ad57cb","DOIUrl":"https://doi.org/10.1088/1681-7575/ad57cb","url":null,"abstract":"We studied the anelastic aftereffect of a flexure being used in a Kibble balance, where the flexure is subjected to a large excursion in velocity mode after which a high-precision force comparison is performed. We investigated the effect of a constant and a sinusoidal excursion on the force comparison. We explored theoretically and experimentally a simple erasing procedure, i.e. bending the flexure in the opposite direction for a given amplitude and time. We found that the erasing procedure reduced the time-dependent force by about 30%. The investigation was performed with an analytical model and verified experimentally with our new Kibble balance at the National Institute of Standards and Technology employing flexures made from precipitation-hardened Copper Beryllium alloy C17200. Our experimental determination of the modulus defect of the flexure yields . This result is about a factor of two higher than previously reported from experiments. We additionally found a static shift of the flexure’s internal equilibrium after a change in the stress and strain state. These static shifts, although measurable, are small and deemed uncritical for our Kibble balance application at present. During this investigation, we discovered magic flexures that promise to have very little anelastic relaxation. In these magic flexures, the mechanism causing anelastic relaxation is compensated for by properly shaping and loading a flexure with a non-constant cross-section in the region of bending.","PeriodicalId":18444,"journal":{"name":"Metrologia","volume":"3 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Power of a test for assessing interlaboratory consensus of nominal and ordinal characteristics of a substance, material, or object 用于评估实验室间对物质、材料或物体的名义和序数特征共识的测试能力

IF 2.4 3区工程技术

Metrologia Pub Date : 2024-06-26 DOI: 10.1088/1681-7575/ad5846

Tamar Gadrich, Yariv N Marmor, Francesca R Pennecchi, D Brynn Hibbert, Anastasia A Semenova and Ilya Kuselman

{"title":"Power of a test for assessing interlaboratory consensus of nominal and ordinal characteristics of a substance, material, or object","authors":"Tamar Gadrich, Yariv N Marmor, Francesca R Pennecchi, D Brynn Hibbert, Anastasia A Semenova and Ilya Kuselman","doi":"10.1088/1681-7575/ad5846","DOIUrl":"https://doi.org/10.1088/1681-7575/ad5846","url":null,"abstract":"A concept of the consensus among different laboratories participating in an interlaboratory comparison, classifying a substance, material, or object according to its nominal and ordinal (i.e. categorical) characteristics, is devised using decomposition of the total variation of the laboratory responses. One of the components of the total variation is caused by the between-laboratory differences, and the second—by conditions associated with the applied experimental design (for example, temperature of test items, technician experience, etc). This decomposition is based on the recently developed two-way CATANOVA for nominal variables and two-way ORDANOVA for ordinal variables. The consensus is tested as hypotheses about homogeneity, i.e. insignificance of the corresponding components of the total variation. The consensus power is taken to be the power of the homogeneity test. A methodology for evaluation of the consensus power and corresponding risks of false decisions versus the dataset size of categorical characteristics obtained in an interlaboratory comparison is detailed. Examples of evaluation of the power and risks are discussed using previously-published datasets of an interlaboratory comparison of identification of weld imperfections, and an examination of the intensity of the odor of drinking water. An example of computer code in the R programming environment is presented for the power calculations in the case of nominal variables, using a chi-square distribution. A newly developed tool for ordinal variables, an Excel spreadsheet with macros, which is based on Monte Carlo draws from a multinomial distribution, is also available.","PeriodicalId":18444,"journal":{"name":"Metrologia","volume":"31 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Report on EURAMET supplementary comparison on measurement of a 1 mm stage micrometer 关于欧洲原子能共同体 1 毫米台阶测微计测量补充比对的报告

IF 2.4 3区工程技术

Metrologia Pub Date : 2024-06-23 DOI: 10.1088/0026-1394/61/1a/04003

M Matus, M del Mar Pérez, E Prieto, A Germak, D Czułek, P Sosinowski, A Duță, E Dugheanu, S Zelenika, M Äremann, B Ozgur, M Asar, P Greeff, K Manana, S Sun, J Buajarern, D A Brasil, B Gastaldi and G Zechner

{"title":"Report on EURAMET supplementary comparison on measurement of a 1 mm stage micrometer","authors":"M Matus, M del Mar Pérez, E Prieto, A Germak, D Czułek, P Sosinowski, A Duță, E Dugheanu, S Zelenika, M Äremann, B Ozgur, M Asar, P Greeff, K Manana, S Sun, J Buajarern, D A Brasil, B Gastaldi and G Zechner","doi":"10.1088/0026-1394/61/1a/04003","DOIUrl":"https://doi.org/10.1088/0026-1394/61/1a/04003","url":null,"abstract":"The results of the EURAMET supplementary comparison on the calibration of a 1 mm stage micrometer are reported. 13 NMIs from 4 RMOs participated in the comparison. Originally, the comparison was planned to use a single artefact. Because it was destroyed during the duration of the comparison, it was necessary to carry out the test in two loops using a new artefact. Artefact circulation started in August 2020 and was completed in September 2022. Both artefacts were the same make and kind. The two artefacts are standard stage micrometers as used in optical microscopy on a transparent, low thermal expansion substrate. The scale length is 1 mm divided in 100 parts. The distances of all 100 scale marks from the zero mark have been measured by each participant. The results with associated uncertainties of all participating NMIs were in good agreement. All En values were smaller than 1 already from the pre-draft A state on. Therefore, no separate analysis of a largest consistent subset was necessary. With 1400 values without a single outlier, it is tempting to assume that uncertainty contributions are somehow overestimated. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/. The final report has been peer-reviewed and approved for publication by the CCL, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).","PeriodicalId":18444,"journal":{"name":"Metrologia","volume":"53 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141522302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum: Corrections to a proposal for three categories of units within the SI (2024 Metrologia 61 033001) 更正件：对国际单位制内三类单位建议的更正（2024 Metrologia 61 033001）

IF 2.4 3区工程技术

Metrologia Pub Date : 2024-06-23 DOI: 10.1088/1681-7575/ad57cc

John Lehman, Alan Migdall, Julia Scherschligt and Lorne Whitehead

引用次数: 0