Felixstowe Community Hospital

Managed aquifer recharge (MAR) offers a potential innovative solution for addressing groundwater resource issues, enabling excess surface water to be stored underground for later abstraction. Given its favourable hydrogeological properties, the Pliocene sand and gravel (Crag) aquifer in Suffolk, UK, was selected for a demonstration MAR scheme, with the goal of supplying additional summer irrigation water. The recharge source was a 4.6 km drainage channel that discharges to the River Deben estuary. Trialling the scheme in June 2022, 12,262 m3 of source water were recharged to the aquifer over 12 days via a lagoon and an array of 565 m of buried slotted pipes. Groundwater levels were raised by 0.3 m at the centre of the recharge mound with an approximate radius of 250 m, with no detrimental impact on local water features observed. The source water quality remained stable during the trial with a mean chloride concentration (133 mg L−1) below the regulatory requirement (165 mg L−1). The fraction of recharge water mixing with the groundwater ranged from 69% close to the centre and 5% at the boundary of the recharge mound, leading to a reduction in nitrate-N concentration of 23.6 mg L−1 at the centre of the mound. During July–September 2022, 12,301 m3 of recharge water were abstracted from two, 18 m boreholes to supplement surface irrigation reservoirs during drought conditions. However, the hydraulic conductivity of the Crag aquifer (∼10 m day−1) restricted the yield and thereby reduced the economic viability of the scheme. Construction costs for the MAR system were comparatively low but the high costs of data collection and securing regulatory permits brought the overall capital costs to within 18% of an equivalent surface storage reservoir, demonstrating that market-based mechanisms and more streamlined regulatory processes are required to incentivise similar MAR schemes.

An ageing population will include increasing numbers of people who have mobility problems, and many who will be unable to perform personal care tasks such as toileting. Support for these groups is likely to be provided by a combination of human carers and electromechanical telecare devices. Many of the technologies that will be needed are already available, and the challenge may be to make them aesthetically appealing to the users. This paper describes some of the current approaches and the likely emergence of robotic devices or personal electronic appliances that will offer people an alternative means of support when they feel that they are unable to perform tasks for themselves. The devices may provide telecare monitoring so that people are only able to accept the electromechanical support when it is actually needed.

À travers une vignette clinique, l’auteur avance l’idée qu’il importe, au cours d’une thérapie de couple, de pouvoir appréhender les problématiques et les modes de fonctionnement individuels, afin de mieux comprendre la problématique de couple qu’elles sous-tendent. Le symptôme sexuel, posé comme un indicateur de l’économie de couple, est particulièrement à l’œuvre dans les couples narcissiques dépressifs.

A set of real $n$th roots that is pairwise linearly independent over the rationals must also be linearly independent. We show how this result may be extended to more general fields.

EMC self-shielding in electronics packaging has become possible with the use of specially configured Ferro-silicate powder, which is a by-product from another process. Present transfer moulded microelectronics packages dominate the packaging of the multi-billion semiconductor devices manufactured annually. These make use primarily of epoxy thermosets which are compounded with compatible inorganic particle "fillers" up to 85% by weight. Further, the electronics equipment businesses make use of plastic enclosures in almost every application, from commodity to complex systems. Analyses have shown that the special ferro-silicate powder is chemically, physically, mechanically and radioactively suited as a filler both with thermosets and thermoplastic composites. The substitution of existing inorganic fillers by appropriately processed ferro-silicate powder is an good opportunity as a significant differentiator filler. Research and development results show that a processed ferro-silicate powder is compatible with the polymer and the moulding process, does not damage or short-circuit the semiconductor chip surface, and provides more than the desired EM shielding ranging from 10 dB up to 90 dB. Microfocus X-ray inspection has confirmed uniformity of particle dispersion resulting from the compounding and moulding processes used. Scanning Acoustic Microscopy has confirmed there are no abnormal delaminations in the moulded packages and enclosures. Electrical measurements have confirmed that the compounding and moulding processes did not result in shorting of the active devices or cause other performance problems as the ferro-silicate is enhanced by further chemical treatments. Reliability testing with Highly Accelerated Stress Test (HAST) of QFPs have demonstrated reliability with no failures during the equivalent of 20 years in tropical climates

An interactive introduction to mathematical analysis, by Jonathan Lewin. £75(hb), £27.95(pb). Pp. 492 + CD-ROM. 2003. ISBN 0 521 81589 4 (hb), 0 521 01718 1 (pb) (Cambridge University Press). - Volume 89 Issue 516

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Karl Menger Selecta Mathematica Volume 1, edited by Bert Schweizer, Abe Sklar, Karl Sigmund, Peter Gruber, Edmund Hlawka, Ludwig Reich and Leopold Schmetterer. Pp. 606. €46.54. 2002. ISBN 3 211 83734 5 (Springer-Verlag). - Karl Menger Selecta Mathematica Volume 2, edited by Bert Schweizer et al. Pp. 674. €59.80. 2003. ISBN 3 211 83834 1 (Springer-Verlag). - Volume 88 Issue 512

An abstract is not available for this content so a preview has been provided. Please use the Get access link above for information on how to access this content.