BACKGROUND: Anthropometrics is very important when ensuring a physical match between end users and product or workstations. OBJECTIVES: The purpose of this study are twofold, to provide anthropometric data for the design of products and to examine the secular changes in the adult Chilean workers in a period of more than 20 years. METHODS: Nineteen anthropometric measurements from two samples from 1995 and 2016 were compared using independent t-test (95% confidence interval), where additionally absolute and relative differences were calculated. RESULTS: The secular trend observed for Stature is characterized by an increase average of 20mm and 10.5mm per decade for females and males, respectively. There is a positive secular trend for both genders, which is observed for most of the selected body measurements. The most pronounced increases were onWeight, Shoulder breadth, Body mass index, Popliteal height; Buttock-popliteal length and Hip width. CONCLUSIONS: Segmental dimensions that experienced a positive secular trend, together with Weight and Stature, are highly correlated with seating design, addressing the need to review products targeting Chilean adult workers, such as public transport seats, office furniture or industrial workplaces.

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The aim of this study was to update the Chilean male workers’ anthropometric database to be used for design purposes and to examine the secular changes observed in a group of anthropometric variables for Chilean male workers. Data collection involved a sample of 2,346 male workers with ages ranging from 18 to 65+, assigned to the Mutual de Seguridad C.Ch.C in the two most populated regions of Chile (Valparaíso and Metropolitana) distributed in nine economic activities branches. Data collection was performed by two teams of 3 physiotherapies each. Before starting the collection process, the measurement teams underwent a training session of one week that included a theoretical session on the basic concepts of anthropometrics, as well as some practical instructions. A total of 32 anthropometric measures were gathered following the ISO standard 7250-1. Before applying the data, a checking process was carried out, trying to identify errors related to the data collection process. The magnitude of the positive secular trend for the stature was 1.0 cm per decade and the highest value was found for shoulder breadth, with a positive increase of 2.7 cm per decade. The results obtained allowed to observe the existence of a positive secular trend for most of the selected body measurements. Finally, it was also possible to verify that the current research may be used for design purposes and to establish the baseline data for long-term observation regarding anthropometric changes among Chilean male workers.

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Obtaining an appropriate match between a product and its end-users requires anthropometric data, which are typically outdated and show variations among different countries. Chile had its anthropometric data taken nearly 20 years ago, thus they are probably outdated. The purpose of this article is to describe some anthropometric characteristics of Chilean workers. An anthropometric survey involving 27 measures and five calculated body dimensions was conducted in 2016. The measurements were based on ISO 7250 and ISO 15535 to ensure the highest standards possible, and a total of 2946 workers, aged from 18 to 76 years old, participated in the survey. The results showed that Chilean workers have smaller dimensions than Dutch and US workers but have larger dimensions than South Koreans. The data presented in this article constitute the most up-to-date anthropometric dataset describing the dimensions of Chilean workers. Practitioner Summary: In Chile, women are smaller and weigh less than men, and both of these populations have high body mass index (BMIs). In addition, the Chilean population exhibits substantial differences compared with other international adult populations. The data presented in this article should be used as a reference when designing for Chilean workers.

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—This article presents an aperiodic control solution for the remote guidance of a convoy of intelligent vehicles tracking non-linear trajectories. To accomplish this, it is assumed that the longitudinal and lateral stability problems are decoupled.
A centralized self-triggered consensus controller ensures convoy stability, thus maintaining the desired distance between vehicles while also achieving a significant reduction in the number of times the channel is accessed. In addition, a decentralized self-triggered controller is designed for each follower to track
nonlinear trajectories. With this self-triggered approach, each vehicle monitors its own state only at precise instants. The main contribution of this proposal is to reduce the wireless channel load while preserving the tracking performance of the convoy.@en