Comparison of Six Passive Exoskeletons for Upper Limbs Using the TOPSIS Method

The use of exoskeletons in occupational tasks has increased significantly in the last five years. However, few comparative studies have been conducted to understand the advantages and disadvantages of existing exoskeletons. This chapter presents the comparison of six exoskeletons using the TOPSIS method. Using databases of patents and commercial products, a total of six that were chosen to be compared by experts in the design and/or use of exoskeletons. The criteria evaluated were exoskeleton weight, load capacity, anthropometric adjusts, maintenance, and installation on the user. The Shoulder-X exoskeleton was selected as the best, serving as a reference for the acquisition of characteristics for recommendations for the development of new models for use in occupational tasks.

Measuring the telework potential of jobs: evidence from the International Standard Classification of Occupations

The coronavirus disease (COVID-19) pandemic has triggered and accelerated the shift of firms and businesses to adopt flexible alternative work arrangements such as teleworking or working from home (WFH) set-ups. To effectively transition to the ‘new normal’ of work, this paper measures the telework potential of jobs or the degree to which a job can be feasibly done at home or offsite. Using the task-based framework, this paper constructs continuous ‘teleworkability’ indices by implementing a classification process of the occupational tasks listed in the International Standard Classification of Occupations 2008 (ISCO-08) and based on the telework indicators in the literature. The correlates of these indices are estimated. Also, the indices are applied to Philippine occupations. The primary contribution of this paper is the set of ‘teleworkability’ indices for all 427 occupations (4-digit ISCO) to describe the telework potential of jobs in countries which pattern their local occupational codes to ISCO-08.

Risk Factors for Injuries in Female Soldiers: a Systematic Review

Background: Female soldiers form an integral part of any modern defence force. Previous reports have highlighted that female soldiers report injuries at higher rates than male personnel. One possible reason for this is an actual difference in underlying injury rates, purported to be due to several factors, including levels of fitness. The aim of this review was to determine risk factors for injuries in female soldiers. Methods: A systematic search was conducted for studies which reported on risk factors for injuries in female soldiers. Databases searched included PUBMED, CINAHL and Medline through OVID. Eligible studies were rated for their methodological quality using the Critical Appraisal Skills Program (CASP) tools and data were extracted and synthesized using a critical narrative approach. Results: A total of 18 articles were included in this review which reported on 18 risk factors for injury. Smoking, previous injury, no history of deployment, heavy occupational tasks, lower levels of aerobic fitness and lower number of push-up repetitions appear to be risk factors for injuries in female soldiers. Age, height, body fat, high or low BMI and body mass do not appear to be consistent risk factors for injury in female soldiers and there appears to be minimal evidence for current levels of activity, sit-up ability, and other assessments of strength, power, speed, or movement being associated with injury risk. Additionally, neither flexibility nor previous levels of activity appear to be associated with injury risk in female soldiers. Conclusion: Strategies to improve aerobic fitness and upper limb endurance, reduce smoking, and optimise rehabilitation from injuries and risk management for heavy occupational tasks need to be developed for female soldiers. Such strategies are also likely to reduce risks for male soldiers.

Investigation of Heterogeneity Sources for Occupational Task Recognition via Transfer Learning

Human activity recognition has been extensively used for the classification of occupational tasks. Existing activity recognition approaches perform well when training and testing data follow an identical distribution. However, in the real world, this condition may be violated due to existing heterogeneities among training and testing data, which results in degradation of classification performance. This study aims to investigate the impact of four heterogeneity sources, cross-sensor, cross-subject, joint cross-sensor and cross-subject, and cross-scenario heterogeneities, on classification performance. To that end, two experiments called separate task scenario and mixed task scenario were conducted to simulate tasks of electrical line workers under various heterogeneity sources. Furthermore, a support vector machine classifier equipped with domain adaptation was used to classify the tasks and benchmarked against a standard support vector machine baseline. Our results demonstrated that the support vector machine equipped with domain adaptation outperformed the baseline for cross-sensor, joint cross-subject and cross-sensor, and cross-subject cases, while the performance of support vector machine equipped with domain adaptation was not better than that of the baseline for cross-scenario case. Therefore, it is of great importance to investigate the impact of heterogeneity sources on classification performance and if needed, leverage domain adaptation methods to improve the performance.

Diagnostics of human functional states in priority studies of Russian physiological schools

Relevance. Physiologically adequate and up-to-date methods are needed for diagnosing functional states in humans during occupational activities.Intention – Analysis of priority studies of domestic physiological schools in the field of diagnostics of human functional states and identification of priority studies, which are associated with the expected progress in the subject area.Methodology. On the basis of a systematic approach, there were reviewed fundamental studies of Russian physiological schools defining key approaches to the diagnosis of human functional states: from the foundations of the natural science research of human states in the process of activity, laid down by I.M. Sechenov, to the achievements of the modern Russian physiological school, one of the leaders of which is Academician A.D. Nozdrachev.Results and Discussion. The features of physiological diagnostics of functional states are shown, an important role of complex interdisciplinary approaches for solving problems of diagnostics based on the results of physiological studies is emphasized. The emphasis is made on the fact that methods for diagnosing human conditions in the process of activity should be guided by the dominant corresponding to each functional state, and take into account that various functional systems of the body are mobilized to ensure this state, with individually specific degree of their involvement in the formation of a functional state. At the same time, when diagnosing functional states it is necessary to take into account complex impacts of occupational factors and use approaches specific for socio-professional groups with the fullest possible consideration of their occupational tasks.Conclusion. It has been shown that methods for diagnosing functional states require development and improvement based on the results of fundamental physiological research, which determine approaches to the diagnosis of human states in the process of activity.

Muscular loads associated with floor vacuuming with cordless stick cleaners

The muscular loads of the upper extremity and chest muscles were assessed during floor vacuuming with stick vacuum cleaners. Ten participants conducted vacuuming with two stick cleaners (weight: 3.03 kg, 3.56 kg) on tiled and carpeted floors while the myoelectric activity of the upper extremity and chest muscles were collected. The mean muscle activation levels ranged from 15.5% to 45.7% of the maximum voluntary capacity. Greater muscular loads were observed on the forearm and shoulder muscles when vacuuming with repeated curved strokes (vs. straight storkes), and on the chest muscle when vacuuming the carpeted floor. The range of muscular loads were higher than that of occupational tasks such as house painting and dental drilling, which have been known as intensive activities for upper extremities. The results suggest that floor vacuuming with stick vacuum cleaners is physically demanding for household consumers. Ergonomic interventions such as more user-friendly design should be considered.

Optimization of the Critical Speed Concept for Tactical Professionals: A Brief Review

Tactical professionals often depend on their physical ability and fitness to perform and complete occupational tasks to successfully provide public services or survive on the battlefield. Critical speed (CS), or maximal aerobic steady-state, is a purported measure that predicts performance, prescribes exercise, and detects training adaptions with application to tactical professionals. The CS concept has the versatility to adapt to training with load carriage as an integrated bioenergetic system approach for assessment. The aims of this review are to: (1) provide an overview of tactical populations and the CS concept; (2) describe the different methods and equipment used in CS testing; (3) review the literature on CS associated with tactical occupational tasks; and (4) demonstrate the use of CS-derived exercise prescriptions for tactical populations.

The Use of Fitness Testing to Predict Occupational Performance in Tactical Personnel: A Critical Review

Tactical personnel work in an occupation that involves tasks requiring a high level of cardiovascular fitness as well as muscular strength and endurance. The aim of this literature review was to identify and critique studies investigating the relationship between physical fitness, quantified by fitness assessment measures, and occupational task performance. Databases were searched for relevant articles which assessed a fitness measure and a measure of occupational performance. A total of 15 articles were included and were deemed to be of acceptable methodological quality (8.4/12 on the Critical Appraisal Skills Programme checklist). Included articles assessed a variety of fitness attributes and occupational tasks. Across tactical groups, there appear to be no standardized fitness tests that can determine occupational performance, with aerobic fitness, anaerobic fitness, strength, endurance, power, and agility all being associated with occupational task performance. A wide range of fitness assessments appears to be required to predict occupational performance within tactical personnel. Efforts should be made to base fitness assessments on occupational demands unique to both the environment and requirements of each individual tactical unit.

Retirement in Western Germany – How Workplace Tasks Influence Its Timing

In this article, task data from the German Qualification and Career Survey (BIBB/IAB) is matched against the Sample of Integrated Labour Market Biographies (SIAB) to investigate what patterns are discernible in retirement between 1985 and 2005 in Western Germany. Set against a background of pension reforms and substantial structural change, the article asks whether the nature of occupational tasks has any significant effect on the timing of retirement. Through the use of event history analysis, the article reveals that having a large percentage of routine manual tasks in one’s job is associated with a greater likelihood of a job holder leaving employment, while having medium to high percentages of non-routine manual tasks in one’s job will tend to decrease that likelihood. There is also evidence that holding a job that includes a medium to high concentration of analytical and interactive tasks will tend to reduce the likelihood of early retirement.