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This a paperback edition of Professor Walker's full-scale examination of the German efforts to harness the economic, military and political power of nuclear fission between 1939 and 1949. The book explains clearly, in terms that the non-specialist can understand, what was involved in the Germans' quest, and in what ways the German scientists succeeded or failed in the development of 'the bomb'

AbstractWe investigate firms that issue seasoned equity following a period of payouts to equity holders. Firms that engage in this roundtrip of equity exhibit strong growth in investment in capital expenditures. Issuing seasoned equity for payout firms does not appear to be associated with future declines in operating cash flow, but rather is associated more with large absolute increases in future cash flow. These firms tend to issue equity when their equity valuations are high, suggesting that market conditions matter. Our findings are consistent with firms issuing equity to use the capital for valuable investments in fixed assets, consistent with market assessments of growth opportunities.

Given the current state of the masonry construction industry (MCI) in South Africa (SA), this study is long overdue. The issues that require immediate attention are: (1) noncompliance; (2) unethical behaviour and (3) lack of knowledge. Evidence to be presented later demonstrates that not all designers and contractors adhere to building policies, regulations and standards. As the demand for buildings constructed of masonry increases significantly over the next few decades, an intolerably high level of adverse overall impact will result. The study's aim is to propose a first step toward a remedy strategy to improve the SA MCI's current state. The objectives are to: (1) present through already published case studies and reports how lack of compliance, ethics and knowledge affects the MCI and (2) suggest recommendations to improve the situation. The study concludes that compliance (predominantly), ethics and knowledge need to be improved in MCI. The study identifies how SA government can improve MCI by systematically implementing ISO 9001: 2015 to improve (1) compliance, (2) ethical behaviour and (3) knowledge in MCI.

This article examines challenges in international nuclear safeguards pertaining to the timely detection of highly enriched uranium production at large-scale gas centrifuge enrichment plants. To establish where present gas centrifuge enrichment plant safeguards measures and approaches could be strengthened, we have created a discrete time model for simulating hypothetical misuse scenarios, both through transient phases and at steady-state. We find that timely detection of misuse at modern large-scale facilities presents a challenge for international safeguards. A toolbox of unattended measurement systems, along with remote monitoring, however, could be used to improve detection timeliness, enabling the initiation of follow-up activities, potentially on a rapid time scale. These measures, which would need very low false alarm rates, should be implemented in a graded approach, depending on the characteristics of each enrichment plant and an analysis of plausible acquisition paths for the State in which it is situated. Some of these technologies could provide significant benefit to plant operators.