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The first demonstration of laser action in ruby was made in 1960 by T. H. Maiman of Hughes Research Laboratories, USA. Many laboratories worldwide began the search for lasers using different materials, operating at different wavelengths. In the UK, academia, industry and the central laboratories took up the challenge from the earliest days to develop these systems for a broad range of applications. This historical review looks at the contribution the UK has made to the advancement of the technology, the development of systems and components and their exploitation over the last 60 years.
For forty years, successive editions of Ethical Theory and Business have helped to define the field of business ethics. The 10th edition reflects the current, multidisciplinary nature of the field by explicitly embracing a variety of perspectives on business ethics, including philosophy, management, and legal studies. Chapters integrate theoretical readings, case studies, and summaries of key legal cases to guide students to a rich understanding of business ethics, corporate responsibility, and sustainability. The 10th edition has been entirely updated, ensuring that students are exposed to key ethical questions in the current business environment. New chapters cover the ethics of IT, ethical markets, and ethical management and leadership. Coverage includes climate change, sustainability, international business ethics, sexual harassment, diversity, and LGBTQ discrimination. New case studies draw students directly into recent business ethics controversies, such as sexual harassment at Fox News, consumer fraud at Wells Fargo, and business practices at Uber.
Nitrous oxide (N2O) misuse is widespread in the UK. Although it is well-known that it can cause devastating myeloneuropathy, psychiatric presentations are poorly described. There is little understanding of who it affects, how it presents, its mechanism of action and principles of treatment. We begin this article with a case study. We then review the literature to help psychiatrists understand this area and deal with this increasing problem, and make diagnosis and treatment recommendations. We describe a diagnostic pentad of weakness, numbness, paraesthesia, psychosis and cognitive impairment to alert clinicians to the need to urgently treat these patients. Nitrous oxide misuse is a pending neuropsychiatric emergency requiring urgent treatment with vitamin B12 to prevent potentially irreversible neurological and psychiatric symptoms.