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Isotope dilution mass spectrometry — A primary method of measurement and its role for RM certification
MAPAN - Tập 25 Số 3 - Trang 135-164 - 2010
This article describes the application of isotope dilution mass spectrometry (IDMS) to the field of reference material (RM) characterisation focusing on the approach, which is applied by the IDMS group at BAM. Emphasis is placed on IDMS measurements of highest analytical quality. Basic principles as well as the equation system are being recalled. Different calibration strategies, such as single, d...... hiện toàn bộ
Conversion of current transformer errors at unity power factor burden, to 0.8 power factor-equivalent
MAPAN - Tập 24 - Trang 3-8 - 2009
The paper contains a full derivation of formulas that enable the conversion of current transformer errors measured at unity power factor burden to equivalent errors at 0.8 power factor lagging burden, required by IEC 60044-1, as well as errors at any other burden. The assumptions and limits of the formulas are discussed.
Estimation of the Expanded Uncertainty of an Analytical Method to Quantify Aluminum in Tissue of Sprague Dawley Rats by FAAS and ETAAS
MAPAN - Tập 32 - Trang 131-141 - 2017
The soluble forms of aluminum are now considered toxic or potentially toxic and they have been associated or related with neurological alterations, liver, bone, hematological disorders and breast cancer. To estimate the expanded uncertainty of a previously validated analytical method to quantify aluminum in tissues of Sprague Dawley rats through flame atomic absorption spectroscopy (FAAS) and elec...... hiện toàn bộ
Characterization of Melt Flow Index of Commercial Polystyrene Using Data from Interlaboratory Comparison
MAPAN - Tập 36 - Trang 47-58 - 2020
The melt flow index (MFI) of commercial polystyrene samples has been investigated throughout an interlaboratory comparison study. The homogeneity samples have been assessed prior to the distribution over the participants. The one-factor analysis of variance model has been applied to separate and evaluate the uncertainty components arising from the analytical method and the heterogeneity of the sam...... hiện toàn bộ
A Novel Weight Loading Method in the 20 kN Deadweight Force Standard Machine
MAPAN - Tập 30 Số 1 - Trang 71-76 - 2015
This paper introduces a novel deadweight force standard machine (DWM) with independent loading weights driving mechanism. So the weights can be individually loaded and unloaded. Because of their free movement, the weights can also be exchanged mutually, and the number of weights can be optimized. In addition, this novel machine requires only a few weights to achieve as much as possible force loadi...... hiện toàn bộ
Design and Evaluation of a 100 kN m Multi-function Torque Standard MachineAbstract This paper presents the design and evaluation of a Multi-function torque standard machine (MFTSM) capable of calibrating hydraulic torque wrenches, torque multipliers either concentric or nonconcentric up to 100 kN m, and torque transducers with regular or irregular bases up to 2.5 kN m, in clockwise and anticlockwise directions. The machine’s performance w... ... hiện toàn bộ
MAPAN -
Đo Lường Áp Suất và Truy Xuất Tại NIS- Ai Cập Dịch bởi AI
MAPAN - Tập 32 - Trang 25-31 - 2016
Cảm biến áp suất, bộ truyền và bộ chuyển đổi được sử dụng rộng rãi để đo và kiểm soát áp suất. Việc truy xuất số liệu đo của thiết bị cảm biến áp suất là rất quan trọng trong nhiều ứng dụng công nghiệp. Cần phải hiệu chuẩn các thiết bị đo áp suất với độ không chắc chắn chấp nhận được có liên kết với các đơn vị SI. Nghiên cứu này nhằm mục đích nghiên cứu sự lan truyền của độ không chắc chắn từ các ...... hiện toàn bộ
#cảm biến áp suất #hiệu chuẩn #độ không chắc chắn #tổ hợp xilanh pit tông #đơn vị SI #truy xuất áp suất
Assessment of Vegetative Cover Dynamics During Pre and Post Covid-19 Period Using Sentinel-2A Imageries in the Western Ghats, South India
MAPAN - - Trang 1-14 - 2023
Coronavirus disease (COVID-19) has changed the living environment in various aspects just like any other disaster. The goal of this study was to use time series remote sensing data to analyze vegetative cover change in the Western ghats of south India from January 2018 to June 2021 (pre & post covid scenario). In this context, biodiversity in terms of Normalized Differential Vegetation Index (NDVI...... hiện toàn bộ
Development and Metrological Evaluation of an Industrial Force Transducer
MAPAN - Tập 35 - Trang 165-176 - 2019
This work regarding the design and development of EN 24-grade steel-based force transducer has been reported along with its metrological features in line with ISO 376:2011 standard. The force transducer has been designed on the basis of analytical and computational methodology and validated through experimental observations. The force transducer presents ease of design-cum-manufacturing and practi...... hiện toàn bộ
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