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Neoprene coatings are not paints and their application is not within the scope of tradesmen without instruction. This is particularly the case with the high or low build catalysed materials employed for the protection of immersed surfaces subject to violent fluid movement as, for instance, on pump impellers and casings, road tankers, etc.

With present‐day moulding and extrusion techniques there is a wide range of articles that can be made from solid plastics and there is an ever‐increasing market for these products in industry and the home. Despite the attractive finish of these plastics articles and their ability to withstand corrosion and mechanical damage, there are objections to the use of the solid material for some applications. From an engineering point of view, there are difficulties of rigidity and mechanical strength, whilst economy also rules out the use of solid plastics in many cases, since, whilst it may be possible to mass‐produce large quantities of moulded plastics articles for domestic use, where there is a very large market potential, it is another thing to produce small runs of specialised engineering products economically. For these reasons there is an ever‐increasing demand for plastics finishes to both standard and purpose made metal goods either to protect the base metal or to produce an attractive finish.

Steel Protection Symposium. On April 18, at Birmingham University, the Zinc Development Association will hold a one‐day symposium on the protection of structural steel. Major attention will be given to the properties and uses of hot galvanized steel. Papers will deal with the design and fabrication, including welding, of galvanized steel for open structures, for building, for power transmission and other applications. One paper will cover metal spraying, with special reference to the protection of large structures including the new Forth Road Bridge, and some attention will be given to other protective systems. A paper on the economic aspects of protection and maintenance will also be discussed. Registration costs 30s. and enquiries should go to the Z.D.A., 34 Berkeley Square, London, W.1.

THE COST of alcoholism to industry has been difficult to estimate, but one survey suggested that 255,000 alcoholics in various stages of addiction are in full‐time employment. A working party set up by the National Council on Alcoholism in 1976, conservatively estimated that the cost to industry was in the region of £350 million per annum.

This paper sets out to disseminate new knowledge about workforce planning, a crucial health sector issue. The Health Select Committee criticised NHS England's failure to develop and apply effective workforce planning. The Workforce Review Team (WRT) commissioned the Institute for Employment Research, Warwick University, to undertake a “rapid review” of global literature to identify good practice. A workforce planning overview, its theoretical principles, good practice exemplars are provided before discussing their application to healthcare.

The literature review, undertaken September‐November 2007, determined the current workforce planning evidence within and outside health service provision and any consensus on successful workforce planning.

Much of the literature was descriptive and there was a lack of comparative or evaluative research‐based evidence to inform UK healthcare workforce planning. Workforce planning practices were similar in other countries.

There was no evidence to challenge current WRT approaches to NHS England workforce planning. There are a number of indications about how this might be extended and improved, given additional resources. The evidence‐base for workforce planning would be strengthened by robust and authoritative studies.

Systematic workforce planning is a key healthcare quality management element. This review highlights useful information that can be turned into knowledge by informed application to the NHS. Best practice in other sectors and other countries appears to warrant exploration.

The subject of part‐time work is one which has become increasingly important in industrialised economies where it accounts for a substantial and growing proportion of total employment. It is estimated that in 1970, average annual hours worked per employee amounted to only 60% of those for 1870. Two major factors are attributed to explaining the underlying trend towards a reduction in working time: (a) the increase in the number of voluntary part‐time employees and (b) the decrease in average annual number of days worked per employee (Kok and de Neubourg, 1986). The authors noted that the growth rate of part‐time employment in many countries was greater than the corresponding rate of growth in full‐time employment.

Post‐industrial predictions of a rapid growth in new technology homeworking have gained widespread currency to become part of the conventional wisdom. However the evidence, including primary research material, suggests that the claims for new technology homeworking, both regarding its extent and its alleged benefits, have been considerably overestimated. In particular, new technology homeworking by itself does not appear to open up opportunities for women to improve their position in the labour market; the demographic changes predicted for the 1990s may provide a better bet. Nevertheless, there is a danger in assuming that all firms apply the same strategy when employing homeworkers; at least three different variations can be identified and this has important implications for personnel managers. The overestimation of new technology homeworking stands in stark contrast to traditional homeworking where the extent has been considerably underestimated. This marginalisation of traditional homeworking stems in large part from the distortion caused by the conceptual split between private and public realms. The failure to find evidence to support the growth of new technology homeworking leads to a consideration of how the arguments may better be considered as rhetoric designed to advance a certain set of ideas – in particular that set associated with “privatisation” as a political ideology.

Public attitudes towards COVID-19 and social distancing are critical in reducing its spread. It is therefore important to understand public reactions and information dissemination in all major forms, including on social media. This article investigates important issues reflected on Twitter in the early stages of the public reaction to COVID-19.

A thematic analysis of the most retweeted English-language tweets mentioning COVID-19 during March 10–29, 2020.

The main themes identified for the 87 qualifying tweets accounting for 14 million retweets were: lockdown life; attitude towards social restrictions; politics; safety messages; people with COVID-19; support for key workers; work; and COVID-19 facts/news.

Twitter played many positive roles, mainly through unofficial tweets. Users shared social distancing information, helped build support for social distancing, criticised government responses, expressed support for key workers and helped each other cope with social isolation. A few popular tweets not supporting social distancing show that government messages sometimes failed.

Public health campaigns in future may consider encouraging grass roots social web activity to support campaign goals. At a methodological level, analysing retweet counts emphasised politics and ignored practical implementation issues.

This is the first qualitative analysis of general COVID-19-related retweeting.

“Corporate planning” is the term which, perhaps more than any other, epitomises the adoption of business management techniques by the public sector. In Britain, with massive local government reorganisation in 1974, many librarians were forced to come to terms with such techniques whether they liked it or not. Of course, in its purest sense corporate planning applies to the combined operation of an entire organisation be it local authority, university, government department or industrial firm. However, in this paper I do not intend discussing “the grand design” whereby the library is merely a component part of a greater body. Rather, it is my intention to view the library as the corporate body. It is a perfectly possible and very useful exercise to apply the principles of corporate planning, and the management techniques involved, to the running of a library or group of libraries. Indeed, many librarians have already done this either independently or as their part in the corporate plan of their parent organisation.

Although first rank symptoms focus on positive symptoms of psychosis they are shared by a number of psychiatric conditions. The difficulty in differentiating bipolar disorder from schizophrenia with affective features has led to a third category of patients often loosely labeled as schizoaffective. Research in schizophrenia has attempted to render the presence or absence of negative symptoms and their relation to etiology and prognosis more explicit. A dichotomous population is a recurring theme in experimental paradigms. Thus, schizophrenia is defined as process or reactive, deficit or non-deficit and by the presence or absence of affective symptoms. Laboratory tests confirm the clinical impression showing conflicting responses to dexamethasone suppression and clearly defined differences in autonomic responsiveness, but their patho-physiological significance eludes mainstream theory. Added to this is the difficulty in agreeing to what exactly constitutes useful clinical features differentiating, for example, negative symptoms of a true deficit syndrome from features of depression. Two recent papers proposed that the general and specific cognitive features of schizophrenia and major depression result from a monoamine-cholinergic imbalance, the former due to a relative muscarinic receptor hypofunction and the latter, in contrast, to a muscarinic hypersensitivity exacerbated by monoamine depletion. Further development of these ideas will provide pharmacological principles for what is currently an incomplete and largely, descriptive nosology of psychosis. It will propose a dimensional view of affective and negative symptoms based on relative muscarinic integrity and is supported by several exciting intracellular signaling and gene expression studies. Bipolar disorder manifests both muscarinic and dopaminergic hypersensitivity. The greater the imbalance between these two receptor signaling systems, the more the clinical picture will resemble schizophrenia with bizarre, incongruent delusions and increasingly disorganized thought. The capacity for affective expression, by definition a non-deficit syndrome, will remain contingent on the degree of preservation of muscarinic signaling, which itself may be unstable and vary between trait and state examinations. At the extreme end of muscarinic impairment, a deficit schizophrenia subpopulation is proposed with a primary and fixed muscarinic receptor hypofunction.

The genomic profile of bipolar disorder and schizophrenia overlap and both have a common dopaminergic intracellular signaling which is hypersensitive to various stressors. It is proposed that the concomitant muscarinic receptor upregulation differentiates the syndromes, being marked in bipolar disorder and rather less so in schizophrenia. From a behavioral point of view non-deficit syndromes and bipolar disorder appear most proximate and could be reclassified as a spectrum of affective psychosis or schizoaffective disorders. Because of a profound malfunction of the muscarinic receptor, the deficit subgroup cannot express a comparable stress response. None -theless, a convergent principle of psychotic features across psychiatric disorders is a relative monoaminergic-muscarinic imbalance in signal transduction.