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The world’s aging population has led to a greater use of prescription and non-prescription medication by the elderly. Besides, older drinkers consume alcohol often regardless of the medication they consume. The purpose of this paper is to examine the intake of medication and alcohol simultaneously in a group of elderly in the community of Madrid, and the possible differences in consumption between men and women.

An observational cross-sectional study of 342 elderly in Madrid, aged 65–96 years was conducted, including the collection of anthropometric data (weight, height, waist circumference, BMI), information about the quantity of daily alcohol intake and medication taken from each subject.

A high percentage of the sample used medication, especially women. A smaller percentage of the sample consumed alcohol, being more frequent among men and decreasing with age. In addition, almost half of the sample (46.4 percent) combined medication intake with alcohol, especially men. High alcohol consumption was observed simultaneously in those subjects taking medication; in addition to the non-perception of the real risk to health. Statistically significant sex differences were observed, since men drank more, including when taking medication; although women may be more vulnerable to harm derived from alcohol.

This study contributed to estimate the risk to the public health of old people, and the integrity of their health, by observing the consumption of both medication and alcohol, given that medication taken in conjunction with alcohol can cause adverse side effects.

The circular economy (CE) is an evolving subject transitioning from conceptualization to empirical testing. Over the past decade, researchers have done an exhaustive study to understand the concept of CE and its realized values both financially and environmentally on organizations that have traditional business models based on linear consumption. For understanding the transitional phenomena completely, the paper aims to review the current and emerging research trends in CE to ascertain future direction.

The research was conducted on 91 articles published in the study area during the past decade (2016–2021) in renowned peer-reviewed journals. The criteria set to review literature are based on the following assortment: CE drivers, CE barriers, definitions by different authors, yearly distribution of the publication, research publisher and journals, google citation and methodology used in the selected research articles.

The study suggests that researchers from the selected years are keen to understand the transition and its critical factors by bringing forward frameworks and incorporating CE with digital technologies. The digital technology implied are Industrial Technology (IR) 4.0, Big Data, Internet of Things (IoT), Artificial Intelligence, Blockchain and Data Analytics to increase organizational and environmental performance. CE researchers need to use empirical testing in different sectors to understand and bring forward more improvised business models and practices according to the dynamics of the industry.

The literature review suggests gaps exist to integrate the micro, meso and macro levels to get CE implementation's system-wide benefits. The study has also identified that many CE frameworks available in the literature for implementation must be empirically tested to yield performance results.

The purpose of this study is to review the existing fatigue and vibration-based structural health monitoring techniques and highlight the advantages of combining both approaches.

Fatigue monitoring requires a fatigue model of the material, the stresses at specific points of the structure, a cycle counting technique and a fatigue damage criterion. Firstly, this paper reviews existing structural health monitoring (SHM) techniques, addresses their principal classifications and presents the main characteristics of each technique, with a particular emphasis on modal-based methodologies. Automated modal analysis, damage detection and localisation techniques are also reviewed. Fatigue monitoring is an SHM technique which evaluate the structural fatigue damage in real time. Stress estimation techniques and damage accumulation models based on the S-N field and the Miner rule are also reviewed in this paper.

A vast amount of research has been carried out in the field of SHM. The literature about fatigue calculation, fatigue testing, fatigue modelling and remaining fatigue life is also extensive. However, the number of publications related to monitor the fatigue process is scarce. A methodology to perform real-time structural fatigue monitoring, in both time and frequency domains, is presented.

Fatigue monitoring can be combined (applied simultaneously) with other vibration-based SHM techniques, which might significantly increase the reliability of the monitoring techniques.

This study aims to investigate the friction coefficient of Al2O3–NbC nanocomposite obtained by spark plasma sintering sliding against a steel ball.

Tribological tests were carried out using a reciprocating nanotribometer in a ball on flat configuration with normal loads in the range from 10 to 100 mN under dry conditions. Surface changes were analyzed by confocal microscopy and 3D profilometry.

The values of the friction coefficient varied from 0.15 to 0.6 and are independent of the applied load.

The tribological behavior is attributed to fracture in the contact region and the effect of wear debris.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2019-0356/