• Energy Research
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Abstract Conventional polymer electrolyte fuel cells (PEFCs) require a means of placing the series of laminar components that make up cells under mechanical compression so as to ensure effective electrical conduction, mass transport and gas-tight operation. This review describes the effect of mechanical compression and dimensional change on the components of PEFCs and reviews the range of methods used to achieve desired stack compression. The case is made for improved understanding of the mechanisms of fuel cell component compression and greater attention to the development of technological approaches for stack compression.

An inverse relationship exists between physical activity and many non-communicable diseases, such as obesity. Given the daily time spent, a logical domain to reach an adult population for intervention is within and around the workplace. Many government bodies, including the World Health Organization (WHO), include worksite health promotions (WHPs) targeted at increasing physical activity as a public health intervention. The aim of this scoping review was to determine what was measured (outcomes) and how they were measured (evaluation tools) during workplace physical activity interventions in order to identify gaps and implications for policies and practice.A scoping review was executed in April 2017 via PubMed, SPORTDiscus, EBSCOhost and the Cochrane Library. This search included articles published between January 2008 to February 2017 in order to coincide with the WHO's Global Plan of Action on Worker's Health. Extracted information was arranged into data collection grids. Cross-analysis of measured outcomes with their corresponding evaluation tools was completed. A quality assessment based on study design was executed.Identification of 732 records was made and ultimately 20 studies and reviews that met criteria were selected. Researchers themed 9 primary measured outcomes. Studies utilized various forms of both objective and subjective evaluation methods. Three primary evaluation methods were categorized: biologic, electronic and declarative tools. The researchers discovered 92 unique tools: 27 objective and 65 subjective, within these parameters.Study quality, measurement tools and data collection were heterogeneous making analysis of effect comparisons problematic and unreliable. Much of the published research does not employ robust statistical analysis making effects difficult to ascertain. Considering the variety of both measured outcomes and evaluation tools, only educated inferences can be made as to the effectiveness and efficiency of WHPs. More standardized measurement practices are therefore suggested for assessment efficiency.

Background: Alcohol use is a key preventable risk factor for serious injury. To effectively prevent alcohol-related injuries, we rely on the accurate surveillance of alcohol involvement in injury events. This often involves the use of administrative data, such as International Statistical Classification of Diseases and Related Health Problems, Tenth Revision, Australian Modification (ICD-10-AM) coding. Objective: To evaluate the completeness and accuracy of using administrative coding for the surveillance of alcohol involvement in major trauma injury events by comparing patient blood alcohol concentration (BAC) with ICD-10-AM coding. Method: This retrospective cohort study examined 2918 injury patients aged ≥18 years who presented to a major trauma centre in Victoria, Australia, over a 2-year period, of which 78% ( n = 2286) had BAC data available. Results: While 15% of patients had a non-zero BAC, only 4% had an ICD-10-AM code suggesting acute alcohol involvement. The agreement between blood alcohol test results and ICD-10-AM coding of acute alcohol involvement was fair ( κ = 0.33, 95% confidence interval: 0.27–0.38). Of the 341 patients with a non-zero BAC, 82 (24.0%) had ICD-10-AM codes related to acute alcohol involvement. Supplementary factors Y90 Evidence of alcohol involvement determined by blood alcohol level codes, which specifically describe patient BAC, were assigned to just 29% of eligible patients with a non-zero BAC. Conclusion: ICD-10-AM coding underestimated the proportion of alcohol-related injuries compared to patient BAC. Implications: Given the current role of administrative data in the surveillance of alcohol-related injuries, these findings may have significant implications for the implementation of cost-effective strategies for preventing alcohol-related injuries.

The ocean provides resources key to human health and well-being, including food, oxygen, livelihoods, blue spaces, and medicines. The global threat to these resources posed by accelerating ocean acidification is becoming increasingly evident as the world’s oceans absorb carbon dioxide emissions. While ocean acidification was initially perceived as a threat only to the marine realm, here we argue that it is also an emerging human health issue. Specifically, we explore how ocean acidification affects the quantity and quality of resources key to human health and well-being in the context of: (1) malnutrition and poisoning, (2) respiratory issues, (3) mental health impacts, and (4) development of medical resources. We explore mitigation and adaptation management strategies that can be implemented to strengthen the capacity of acidifying oceans to continue providing human health benefits. Importantly, we emphasize that the cost of such actions will be dependent upon the socioeconomic context; specifically, costs will likely be greater for socioeconomically disadvantaged populations, exacerbating the current inequitable distribution of environmental and human health challenges. Given the scale of ocean acidification impacts on human health and well-being, recognizing and researching these complexities may allow the adaptation of management such that not only are the harms to human health reduced but the benefits enhanced.

At the peak of the COVID-19 pandemic, the estimated daily use of face masks was at its highest, thereby creating huge public health and environmental challenges associated with the indiscriminate disposal of used ones. The present study assessed Abu Dhabi University students’ handling and disposal of single-use face masks during the pandemic. A cross-sectional study using an online survey questionnaire was used to gather data from 255 students from the target group. Face mask type was found to be significantly influenced by both the student’s gender and age, while the participant’s habit of hand washing after handling a used face mask was found to be significantly influenced by the student’s age. The student’s educational level significantly influenced group decisions regarding the most appropriate face mask to use, as well as environmental and health consequences awareness of indiscriminate face mask disposal. While the students are adequately aware of COVID-19’s impact and had good knowledge of face mask use, a high proportion professed to the unsafe disposal of used face masks in public areas, thereby adding to microplastic pollution in the environment and its associated impacts. The study alluded to the need for strengthening the participant’s knowledge, attitude, and practices as precautionary measures that mitigate the environmental effect of the indiscriminate disposal of used face masks. The findings also call for a collaborative partnership among stakeholders toward designing effective educational campaigns to minimize the environmental impacts posed by face mask disposal.

In battery systems, aqueous electrolytes are superior in ionic conductivity, interfacial wettability, safety and environmentally benign compared to organic liquids, polymers, inorganic solid-state and ionic liquid electrolytes.

A further investigation has been made of the experimental factors which control the rate of spreading of electrolyte films on partially immersed, negatively polarised metal substrates. These have included electrolyte concentration, conductivity and cation type. It is shown that the spreading rate is directly proportional to electrolyte conductivity and cation mobility. A critical consideration of these experimental factors, together with those determined in previous investigation, leads to the conclusion that neither the mechanism based on the Marangoni effect nor that based on classical electroosmosis are capable of explaining the observations in any conclusive manner. It is shown that an electromigration type model is more relevant. In this mechanism momentum is transferred to the solution at the intrinsic meniscus front or within the film by migrating cations involved in the electrolytic conduction process which is necessary to maintain continuity of current between the metal/film interface (hydrogen evolution and/or oxygen reduction reactions) and the film/bulk electrolyte region.

The use of traditional medicine has been growing rapidly lately. One of the medicinal plants that have been developed especially in East Kalimantan is Dayak onion plant (Eleutherinepalmifolia (L.) Merr). Dayak onion concoctions have also been used by various groups of Dayaks as an alternative medicine for various diseases, and also to find out the possibility of people who being affected by the disease and how to process Dayak onion ingredients, an disease diagnosis system is needed that is able to diagnose the disease and how to process Dayak onion ingredients to get proper treatment. This study uses ten diseases that can be diagnosed, namely Hemorrhoid Disease, Nephrolithiasis, Diabetes Mellitus, Hypertension, Hepatitis, Tuberculosis, Bronchitis, Sinusitis, Uric Acid, and Rheumatism. The method used is Certainty Factor; the result of this research is a web-based expert system that is used to assist people in diagnosing diseases that can be cured by Dayak Onion.