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Calibration, Verification, Quantification, Statistical Treatment of Analytical Data, Detection Limits, and Quality Assurance/Quality Control
Published in Paul R. Loconto, Trace Environmental Quantitative Analysis, 2020
Operational errors are due to departures from correct procedures or methods. These errors often are time dependent. One example is that of drift in readings from an instrument before the instrument has had time to stabilize. A dependence of instrument response on temperature can be eliminated by waiting until thermal equilibrium has been reached. Another example is the failure to set scales to zero or some other reference point prior to making measurements. Interferences can cause either positive or negative deviations. One example is the deviation from Beer’s law at higher concentrations of the analyte being measured. However, in trace analysis, we are generally confronted with analyte concentration levels that tend toward the opposite direction.
Human Reliability and RAMS Management
Published in Qamar Mahboob, Enrico Zio, Handbook of RAMS in Railway Systems, 2018
A clearer understanding of the different sources of errors can provide engineers with a means for determining the different actions needed to prevent them. The classification of human failures provides a means to understanding how different human failures have different causes and remedial actions when assessing human failure causation in incident and accident investigations. Kletz (2005) suggests the following classification of human error:
A remote VR operation system for a fully mechanised coal-mining face using real-time data and collaborative network technology
Published in Mining Technology, 2018
Jiacheng Xie, Zhaojian Yang, Xuewen Wang, Yiliang Wang
Generally, the shearer has two operators, one responsible for controlling the front drum and the other responsible for controlling the rear drum; thus, the training mode of network collaboration is chosen. In this training mode, the first operator controls the front drum via the operation panel in the centralised control centre and the second operator controls the rear drum via the shearer remote controller (Figure 8). In addition to controlling the front drum, the first operator must also control several other buttons as well as the haulage speed and direction buttons. The two operators must cooperate. If there are problems in the training process, then the system informs the operators and asks them to correct their operational errors.
Consideration of multi-variable uncertainty using the GPC method for the dynamic study of a two-stage gearbox of a wind turbine
Published in Mechanics of Advanced Materials and Structures, 2022
M. Hadj Kacem, A. El Hami, K. Dammak, H. Trabelsi, L. Walha, M. Haddar
In order to reduce the vibrations of the transmission system and according to previous studies, several mechano-geometric parameters affect the dynamic behavior of the system. There are several sources of these errors, including design and manufacturing defects or external excitations from the surrounding environment. Therefore, when designing a system, several parameters require an uncertainty interval, which raises questions about the dynamic displacement of the system, the size of the uncertainty interval, and if this range is valid for the dynamic study of a system with several uncertain parameters.
Human error identification and risk prioritization in LPG unloading operations
Published in International Journal of Occupational Safety and Ergonomics, 2023
Prabhjot Singh Virdi, Gulab Pamnani
Apparently, as can be observed from Table 10, most of the errors cannot be recovered once they are committed. This compels the reduction and prevention of errors before they are committed in any task. Reduction and prevention of errors can be achieved through proper training along with regular and scheduled inspection.