scholarly journals Analysis of measurement uncertainty sources in the casting process

2021 ◽  
Vol 9 (2) ◽  
pp. 1-4
Author(s):  
Lisiane Trevisan ◽  
Vinicius de Freitas Paz ◽  
Daniel Antonio Kapper Fabricio

The concepts used in metrology are increasingly part of the productive process of metallurgical companies, considering the globalization of the world market. The interpretation of metrological concepts and their application in decision-making is still a challenge for the industry, especially for the measurement uncertainty calculation. Industries in the casting area are in great need of skilled labor both in relation to the productive process and engineering, as well as in metrology, highlighting the interdisciplinary of the concepts studied in the technical or baccalaureate courses. Therefore, the main objective of this work is to perform a brief literature review of publications made using the value of uncertainty of measurement within the production process of foundries. The results show that there is a potential research in the field, to which it relates the values of measurement uncertainty and fused components.

Author(s):  
Daniel Soto Forero ◽  
Yony F. Ceballos ◽  
German Sànchez Torres

This paper describes a model to simulate the decision-making process of consumers that adopts technology within a dynamic social network. The proposed model use theories and tools from the psychology of consumer behavior, social networks and complex dynamical systems like the Consumat framework and fuzzy logic. The model has been adjusted using real data, tested with the automobile market and it can recreate trends like those described in the world market.


2021 ◽  
Vol 854 (1) ◽  
pp. 012093
Author(s):  
Silvana Stajkovic ◽  
Dragan Vasilev ◽  
Mirjana Dimitrijevic ◽  
Nedjeljko Karabasil

Abstract Knowledge of the measurement uncertainty of test results is fundamentally important for laboratories, their customers and all parties using and interpreting these results. In conformity assessment, a measurement result is used to decide if an item of interest conforms to a specified requirement. Because of measurement uncertainty, there is always the risk of incorrectly deciding whether or not an item conforms to a specified requirement based on the measured value of a property of the item. Conformity assessment can be quite challenging when the entity measured is so close to the tolerance limits of the specification that its uncertainty, however estimated, critically affects decision-making. In such cases, different decision rules can be used to make statements of conformity. The aim of this paper is to provide a survey of methods for the evaluation of measurement uncertainty in testing, as well as to stress the need for appropriate estimation of measurement uncertainty. This paper also aims to assist testing laboratories in understanding the different decision rules used in conformity assessment and level of risk (such as false accept and false reject) associated with the decision rule employed.


2021 ◽  
Vol 10 (4) ◽  
pp. 0-0

All around the world, trends of globalization and industrialization have been experienced both in the development of large corporations and conglomerates. These larges firms contribute enormously to the socio-economic development of countries. Adopting a systematic literature review method with in-depth content analysis, the paper explores the concept of corporate governance holistically from systems lens and proposes an innovative systems structure-based framework namely Cultural Legal Oriented Value Embedded (CLOVE) for corporate governance to enable better decision making. In this paper, the structure proposed refers to components of culture, legal, orientation, value embeddedness that may be internal or external to the firm and these components are those, which will have a role in undertaking effective corporate governance and wealth creation for shareholders and the firm.


2017 ◽  
Vol 9 (42) ◽  
pp. 5989-5996 ◽  
Author(s):  
Stephen L. R. Ellison ◽  
Michael H. Ramsey ◽  
Paul Lawrance ◽  
Brian Stuart ◽  
Jesus Minguez ◽  
...  

The contribution of sampling to the combined uncertainty of measurement is assessed using a combination of literature review and experimental determination of sampling variability in a range of foodstuffs in order to determine whether there is a consistent relationship between analyte level and proportion of variation attributable to sampling.


2007 ◽  
Vol 1 (1) ◽  
pp. 33-40
Author(s):  
Eliacy Pordeus

The acceptance of the of Quality Administration System ISO 9000 in the world market is undeniable. Several studies have been registering the results of the companies that have been implanting such system in its productive process, showing as the norm is being interpreted to the reality of several sections. This article seeks to contribute with the description of a quality administration system ISO 9002 in the industrial section of drunk, in a branch of AMBEV. An analysis of the results display a rigid control in the productive process, because a small variation in the production already differentiates the product type. As well as that actions of environmental nature have the documental and operational control accomplished by the quality administration, being rendered the possibility of integration points then among the two administrations.


2021 ◽  
Vol 6 (1) ◽  
pp. 120-132 ◽  
Author(s):  
Mikiko Terashima ◽  
Kate Clark

One in five people in the world are said to have some type of disability. Disability is not merely individuals’ compromised capability in navigating the built environment, but rather the ‘misfit’ of capabilities with how a given living environment is organized. Planning, therefore, has a crucial role to play in responding to the needs of this significant population through changes to the built and social environment. However, discussion on planning theories and practices with a focus on persons with disability (PWD) has been limited to more specific realms of ‘design,’ and precariously absent in broader planning research. This systematic literature review aims to inform potential directions for planning scholarship by exploring the current and historic planning research investigating the needs of PWD. We compiled relevant papers from five prominent English language planning journals, some of which are long-standing (<em>Town Planning Review</em>, 1910–, <em>Journal of the American Planning Association</em>, 1935–). A very limited number of papers (n = 36) on topics related to PWD of any type have been published in the five journals throughout their existence, with even fewer focusing on the population. The subareas of planning these papers addressed include housing, transportation, land use, policy, and urban design. Many papers called for participation by PWD in the planning and decision-making processes, and some recent papers advocated for the production of evidence related to costs of creating accessible infrastructure. A critical look on some disciplinary divides and enhanced roles of planning research would be beneficial.


2015 ◽  
Vol 742 ◽  
pp. 86-89
Author(s):  
Jing Zhang ◽  
Feng Wang ◽  
Jun Gang Zhou ◽  
Ming Long Hu

The electrical clearance and creepage distance are two key parameters for the design of MCCB (molded case circuit breaker, MCCB), which directly influences the electrical safety performance of MCCB. In this paper, the electrical clearance and creepage distance measurement uncertainty were evaluated through the uncertainty sources analysis, the mathematical model establishment and the components uncertainty calculation, to ensure the accuracy of the measurement results.


WARTA ARDHIA ◽  
2017 ◽  
Vol 42 (3) ◽  
pp. 109
Author(s):  
Nur Oktaviani Widiastuti

Penyebab utama kecelakaan penerbangan adalah human error (55%) dengan salah satu penyebab adalah miskomunikasi. Miskomunikasi menjadi penyebab kasus kecelakaan terbesar di dunia seperti kecelakaan antara Pan Am dan KLM, Garuda dengan nomor penerbangan 152, dan kecelakaan yang baru-baru ini terjadi antara Batik Air dan Transnusa. Selain itu, KNKT pernah mengalami kebingungan saat menginvestigasi cockpit recorder Air Asia QZ8501. Saat miskomunikasi terjadi, instruksi sering kali sulit dipahami dan diperlukan pengulangan komunikasi, yang mempersempit waktu pengambilan tindakan. Penelitian ini ingin mengembangkan konsep speech recognition dengan sistem voice sign and text untuk prosedur pengecekan komunikasi kru penerbangan. Metode dalam penelitian ini adalah kajian pustaka dan perancangan sistem. Hasil dari penelitian ini adalah penambahan prosedur komunikasi dengan sign dan teks yang diperoleh dengan bantuan speech recognition. Pesan teks berasal dari ucapan yang diterjemahkan oleh speech recognition menjadi teks, kemudian teks akan diubah menjadi sign. Lalu sign dan teks akan ditampilkan dan dilihat langsung oleh pilot. Dengan penambahan sistem sign dan teks disamping komunikasi melalui suara diharapkan kesalahan dapat diminimalisir, pengambilan keputusan dapat dilakukan dengan cepat, dan kecelakaan dapat dihindari. [Speech Recognition Conceptual Design in Aircraft Communications to Reduce Flight Communication Mistake] The main cause of aviation accidents is the human error (55%) in which one of its factor is the miscommunication. Miscommunication involved in the most accidents in the world including Pan Am and KLM accident, Garuda flight 152 (the biggest accident in Indonesia), and that was recently occurred between Batik Air and Transnusa Airline. Moreover, NTSC was confused when investigating the Air Asia QZ8501 cockpit recorder. When miscommunication occurs, the repetition of communication is prominently required due to the difficulty in understanding the instruction, which later narrowed the time to take any action. This study is intended to develop the concept of speech recognition with voice sign and text system for flight crew communication checking procedure. The methodology that is used in this research is the combining of literature review and system design. The results of this study is the addition of communication procedure by means of sign and text that obtained from speech recognition process. The text is produced from the translation of voice by speech recognition and converted into sign afterwards. Both of sign and text will be displayed, thus can be seen by the pilot. In addition to communication by voice, the implementation of sign and text is expected in minimalizing the error, supporting faster decision making, and avoiding the accident.


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