Liyue Yan, Houjun Wang, Hao Wang, Zhen Liu
In practice, the degradation process of electronic products is usually accompanied with singularities caused by intermittent and transient interference, improper conduct on singularity processing would inevitably and seriously affect the accuracy of products’ life-time prediction. Taking advantage of rapid development of AI technology recent year, a new surrogate approach based on spline function and online sequential extreme learning machine (OS-ELM) is developed in this paper, to address these issue. This fusion approach takes the cubic non - polynomial spline function as the prediction...
TC10 Conference 2020 (ONLINE)
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· 2020
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Mohamad Syahadi, Hayati Amalia, Agah Faisal
A method for calibrating a solid state DC voltage standard in Laboratory of National Measurement Standards for Electricity and Time (NMS ET Lab) of National Standardization Agency of Indonesia is presented in this paper. The measurement and its evaluation are carried out based on differential measurement method to the test of solid state DC voltage standard by implementing calibration values from Bureau International des Poids et Mesures (BIPM) at the nominals of 1.018 V and 10 V. Corrections due to temperature, pressure, humidity coeficient and drift are also examined. Based on evaluation...
TC10 Conference 2020 (ONLINE)
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Phuritpach Nantasitangkool, Nitiphat Kittirakshakula, Wanna Watcharayotinkul, Worapot Prongmanee, Umaporn Lamdab, Siripassorn Sukhkhawuttigit, Hathaichanok Muenkla, Nalin Ratnarathorn, Rung Kumpoo, Nakarin Sihabunmak, Zenith Samransamruadkit
The investigation of Gunshot Residue (GSR) in Forensic science was carried out by Scanning Electron Microscope (SEM) energy-dispersive x-ray spectroscopy (EDS) and Inductively Coupled Plasma - Optical Emission Spectrometer (ICP-OES). These techniques are not widely used in Thailand. However, the commercial laboratory (CL), Central Institute of Forensic Science (CIFS), and the Royal Thai Police (RTP) attempt to develop these techniques to promote novel ways for GSR analysis. Also, the standard measurement was a crucial requirement in ISO/IEC 17025 quality standard. As a part of quality...
TC10 Conference 2020 (ONLINE)
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Muhammad Azzumar, Lukluk Khairiyati, Nibras Fitrah Yayienda, Mohamad Syahadi, Hayati Amalia, Hadi Sardjono, Miftahul Munir, Agah Faisal, Windi P. Kurnia , Ashri C. Khusnul
This paper describes an early development of software for automatic measurement of the multifunction calibrator using direct measurement method with the reference multimeter. The software is developed to control the multifunction calibrator and the reference multimeter using GPIB interface. The developed software can do single point measurement and multi points measurement by configuring the instruments automatically. For the security reasons against the instruments, it is equipped with a pop-up alert to indicate that a connection change is required before the measurement begin, because the...
TC10 Conference 2020 (ONLINE)
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Andrés J Bohórquez, Sergio A. Carvajal, Ciro A. Sánchez, Astrid Riveros
In this work, a study of the impact that the commonly-known ‘loading effect’ has over the determination of inhomogeneity and temporal stability of a climatic chamber is presented. Consecutive yearly characterizations of a twopressure humidity generator treated as a climatic chamber revealed that the spatial inhomogeneity strongly depends on the environmental conditions of the laboratory as well as the percentage of the work volume occupied by ‘loading devices’, such as capacitive thermohygrometers. Results show that temperature and relative humidity measurements can vary as much as 0.4 °C...
TC10 Conference 2020 (ONLINE)
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Carlos España, Gustavo Gómez, Katherin Holguín, Johanna Abella, Diego A. Ahumada
This paper shows the experience in the operation of a proficiency test for the analysis of Cadmium in Cocoa. Due to the limited number of analytical laboratories participating, this proficiency test was developed with two reference materials (RMs), which were prepared from cocoa beans. The certified value for Cadmium in the two RMs (low and high concentration levels of Cadmium) was based on the agreement of results of at least two methods: ICP-MS and GF-AAS conducted at the National Metrology Institute of Colombia. The homogeneity and stability studies were performed according to guide ISO...
TC10 Conference 2020 (ONLINE)
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Johanna Abella, Andrea Mojica, Diego A. Ahumada
During 2020, the National Metrology Institute of Colombia, organized one proficiency testing (PT) for the quantification of elements in water. In the PT, external reference values were used instead of consensus values derived from the participants' results. The test material used in the PT was a certified reference material from another National Metrology Institute. To maintain the confidentiality of certified values, it was necessary to carry out a repackaging process. Therefore, in this work are presented the results of several studies that sought to establish the best mechanism to carry...
TC10 Conference 2020 (ONLINE)
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Laura E. Morales, Diana C. Sinuco, Diego A. Ahumada
To achieve measuring methods harmonization, improve reliability, and quality of measurement results, the use of certified reference materials (CRM) are necessary. Due to the instability of some compounds, the offer of CRM of pesticides is low. The National Metrology Institute of Colombia, as reference materials producer, has evaluated strategies to determinate and improve the stability of ten multiclass selected pesticides in calibration solutions. For this purpose, to obtain an overview of the degradation behavior of pesticides, ten compounds with different physicochemical characteristics...
TC10 Conference 2020 (ONLINE)
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Leonardo Soto, Niño Fabian, Diego A. Garzón, Diego A. Ahumada
A candidate to certified reference material for mercury in fish was produced from Calophysus macropterous, a species of catfish that has been reported with high levels of this contaminant at the Amazonian region. The fish was filleted, freeze-dried and degreased, then sieved, homogenized and packaged; 106 bottles were produced with a net content of 15 g. In the study of homogeneity of the material, ICP-MS in standard mode was used, like a measurement method with microwave-assisted acid digestion. The homogeneity assessment with a random sampling stratified was carried out. The preparation...
TC10 Conference 2020 (ONLINE)
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Antonella Gaspari, Giulio D’Emilia
The Industry 4.0 enabling technologies offer new opportunities of innovation for many Small and Medium Enterprises (SMEs). More and more, the information deriving from measurements by intelligent and advanced data processing gives possibility of introducing new and smart approaches in many sectors contemporaneously, like production, maintenance, energy saving and supply chain management. Validation of data to be used for this multi-purpose analysis is mandatory, starting from the very preliminary phase. Taking in mind typical operating scenarios of Italian SMEs, in this paper a set of...
TC10 Conference 2020 (ONLINE)
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