RESEARCH OF HUMAN FATIGUE AND MEASUREMENT PARAMETERS FOR WORKABILITY ASSESSMENT

Human fatigue is reduced working capability for certain period of time as the result of unusual or prolonged workload. Fatigue arises when the body’s energy requirements exceed its supply. Fatigue first manifests as reduced concentration capability causing movement coordination and precision disruption leading to decreasing workability. Fatigue is an object of research in physiology, psychology, work ergonomics, medicine, and biotechnology where each domain has a focus on mental fatigue. The functional state in the context of professional activity is defined as a complex of characteristics of functions and qualities that determine the fulfilment of labour activity. Furthermore, a comprehensive estimation of subject functional state in combination with other factors like subject self-assessment and objective performance tests (cognitive load tests) is a necessary input for the evaluation of workability and efficiency on task. The heterogeneous nature of fatigue as a systemic manifestation requires analysis of multiple key parameters which are relevant to the specific type. The current feasibility study focuses on human biological signal from electrical activity of heart, brain, muscles and skin potentials as well as temperature, position, and respiration to obtain diagnostic parameters reflecting the state of cardiovascular, muscles, and central nervous systems for physiological monitoring of vital signs. The fatigue physiological parameter and feature formalization aim to support the development of a platform with complex passive multi-level fatigue monitoring system and workability evaluation system designed in order to provide an integrated service

Topological Modeling Based Diagnostic Tests Selection

This article covers the process of software testing. Test management and creation methods are described within the scope of the research. The process of test selection through several stages of project development is discussed and practical examples of appliance are given for the test organization and decision making with the help of topological models of software. The criteria of test ranging are described within scope of each of the testing levels. The paper indicates the use of topological structural models in software test creation, and planning

Self-service Audiometer Implementation by Using Computer Sound Card

The implementation of pure tone threshold audiometry method into self-service audiometer software is described in this paper. The purpose of audiometer is to determine the hearing threshold by a graph of the lowest signal intensity as a function of signal frequency which can the person under test hear during certain measurement conditions. The proposed solution can be integrated for use in mobile system for screening and monitoring as well as used for self-screening in household use. The results of hearing test can be stored in data base for each individual patient and used for further analysis in order to determine the presence of hearing disorders. Audiometer software implements flexible use of sound recording and playback features through computer peripherals, more important, calibration and noise measurement features being used in this software to obtain reliable results