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Wearable sensors can be used to monitor many interesting parameters about the wearer’s physiology and environment, with important applications in personal health and well-being, sports performance and personal safety. Wearable chemical sensors can monitor the status of the wearer by accessing body fluids, such as sweat, in an unobtrusive manner. They can also be used to protect the wearer from hazards in the environment by sampling potentially harmful gas emissions, such as carbon monoxide. Integrating chemical sensors into textile structures is a challenging and complex task. Issues which must be considered include sample collection, calibration, waste handling, fouling and reliability. Sensors must also be durable and comfortable to wear. Here, we present examples of wearable chemical sensors that monitor the person and also his/her environment. We also discuss the issues involved in developing wearable chemical sensors and strategies for sensor design and textile integration.

Since 2000, the value of aircraft assets imported to – and exported from – the Irish economy has increased significantly. In each case, these figures represent a marked rise over a 17-year period. This gives rise to some simple questions: what are the dynamics that give rise to a small, open economy's demand for aircraft assets on this scale? Indeed, is it merely a reflection of our island location or is there something more at play? And can we comment on the role of the air cargo industry in this demand? Ireland's growing aircraft leasing industry is internationally orientated with Ireland emerging as an important hub for this industry. A recent industry estimate noted that nine of the world's 10 largest aircraft leasing companies are located in Ireland with the number of aircraft managed in Ireland at 3,500 (or 50%) of the entire global fleet of leased aircraft. This, in part, is an important contributor to this demand for aircraft assets. The objective of this research is to examine the flow of imports and exports of aircrafts to, and through, Ireland using Eurostat's International Trade in Goods Statistics (ITGS) dataset. The authors also use the International Trade in Services series in the Balance of Payments in order to consider the value, and relative scale, of the services provided by air freight operators in order to provide some context to the role of the air cargo sector.

I HAVE sometimes been asked whether I am conscious, as the present editor of THE LIBRARY WORLD, of the spirit and influence of its founder, James Duff Brown, and of his editorial successors, who included J. D. Stewart and W. C. Berwick Sayers. The answer is that of course I am—how could it be otherwise?

THE popular image of Ireland is of a land where one can enjoy the perfect holiday. If you are a golfer, fisherman, rambler or if you just enjoy good food and of course the black nectar for which it is famous, then Ireland is the place to go, take the word of TV Chef, Keith Floyd. Ireland however, unlike many small countries, is not content to base its economy on tourism.

LIBRARIANS in Britain stand at the threshold of great possibilities. Having passed through the ages of the ecclesiastical library, the rich collector's private library, the academic institutional library, and the rate‐supported public library—all general libraries —they have reached the age of the special library. The next will be that of the co‐ordinated, co‐operative library service.

AN ESTEEMED correspondent points out that there are about two dozen library magazines of all sorts and sizes in circulation, whereas when he started his career there were no more than three. Our correspondent has himself had considerable editorial experience, and it may be that he is still in harness in that regard. One of his earliest efforts was in running the magazine of the old Library Assistants' Association, and it is not likely that that magazine has ever reached the same heights of excellence as it attained in his day. He observes that there are far too many library magazines now in circulation. We agree.

IN the nature of things the Library Association Conference this year cannot have the spectacular character of the jubilee one of 1950; but that does not mean it will be less effective or less useful. Edinburgh is the second city of the United Kingdom, at least in appeal to bookmen, and probably Scots would object to our order of the hierarchy. Apart from the public libraries, a place that has the National Library of Scotland, the Advocates, the Signet and the University libraries, to name only the principal ones, with many associations and treasures, must have great attractions. On looking over conference reports generally, one can infer that the one institution in a town that is not frequented by librarians in the week is the public library. The obstacle is no doubt occupation with the meetings, which many delegates are naturally unwilling to miss. But we do suggest that library visits by newcomers to Edinburgh might be quite as important, in present impression and lasting effect, as most ordinary meetings can be. Since it must be admitted that our business at Edinburgh is to attend meetings, restraint is essential, but at least the Central Library and the fine Leith Library should be squeezed into the personal programme.

Design, fabricate and evaluate all-solid-state wearable sensor systems that can monitor ion concentrations in human sweat to provide real time health analysis and disease diagnosis capabilities.

A human health monitoring system includes disposable customized flexible electrode array and a compact signal transmission-processing electronic unit.

Patterned rGO (reduced-graphene oxide) layers can replace traditional metal electrodes for the fabrication of free-standing all solid film sensors to provide improved flexibility, sensitivity, selectivity, and stability in ion concentration monitoring. Electrochemical measurements show the open circuit potential of current selective electrodes exhibit near Nernst responses versus Na+ and K+ ion concentration in sweat. These signals show great stability during a typical measurement period of 3 weeks. Sensor performances evaluated through real time measurements on human subjects show strong correlations between subject activity and sweating levels, confirming high degree of robustness, sensitivity, reliability and practicality of current sensor systems.

In improving flexibility, stability and interfacial coherency of chemical sensor arrays, rGO films have been the developed as a high-performance alternative to conventional electrode with significant cost and processing complexity reduction. rGO supported solid state electrode arrays have been found to have linear potential response versus ion concentration, suitable for electrochemical sensing applications. Current sweat sensor system has a high degree of integration, including electrode arrays, signal processing circuits, and data visualization interfaces.