An investigation of solubility and diffusion of oxygen in refractory metals Quarterly report, Jan. - Mar. 1966

Solubility and diffusion of oxygen in refractory metals measured by electrical resistivit

Coherent Description for Hitherto Unexplained Radioactivities by Super- and Hyperdeformed Isomeric States

Recently long-lived high spin super- and hyperdeformed isomeric states with unusual radioactive decay properties have been discovered. Based on these newly observed modes of radioactive decay, consistent interpretations are suggested for previously unexplained phenomena seen in nature. These are the Po halos, the low-energy enhanced 4.5 MeV alpha-particle group proposed to be due to an isotope of a superheavy element with Z = 108, and the giant halos.Comment: 8 pages, 2 figures, 1 table, to be published in Int. J. Mod. Phys.

Super- and Hyperdeformed Isomeric States and Long-Lived Superheavy Elements

The recent discoveries of the long-lived high spin super- and hyperdeformed isomeric states and their unusual radioactive decay properties are described. Based on their existence a consistent interpretation is given to the production of the long-lived superheavy element with Z = 112, via secondary reactions in CERN W targets, and to the low energy and very enhanced alpha-particle groups seen in various actinide fractions separated from the same W target. In addition, consistent interpretations are suggested for previously unexplained phenomena seen in nature. These are the Po halos, the low-energy enhanced 4.5 MeV alpha-particle group proposed to be due to an isotope of a superheavy element with Z = 108, and the giant halos.Comment: 4 pages. Contribution to the 2nd Int. Conf. on the Chemistry and Physics of the Transactinide Elements (TAN 03) Napa California, November 200

Solubility and diffusion of oxygen in tantalum

Solubility of oxygen in tantalum determined by resistivity techniqu

No more ego-spheres:An interview with Lydia Kallipoliti on ecological design

A conversation about ecological design with architect, engineer, and scholar Lydia Kallipoliti. Taking her books The Architecture of Closed Worlds (2018) and Histories of Ecological Design (2024) as starting points, we asked Kallipoliti to share her understanding of ecological design and trace the histories of ecological design thinking. In this context, the interview focuses on design projects of the 20th century which sought to create so-called ‘closed worlds’: habitats that could function as closed systems where all material resources are regenerated from recycled waste. In addition to explaining the motivations for these projects, Kallipoliti addresses their practical limitations and the theoretical conclusions we can draw from them. Kallipoliti furthermore reflects on the notions of mediation and scale in design thinking and on the politics of the cycle

Multilayered printed circuit boards inspected by X-ray laminography

Technique produces high resolution cross-sectional radiographs with close interplane spacing for inspecting multilayer boards to be used in providing circuitry routing and module structural support

Investigation of solubility and diffusion of oxygen in refractory metals Second quarterly report, 1 Oct. - 31 Dec. 1965

Electric resistivity measurements to determine solubility and diffusion of oxygen in tantalum, columbium, and alloy

An investigation of solubility and diffusion of oxygen in refractory metals First quarterly report, 1 Jul. - 30 Sep. 1965

Determination of solubility limits and diffusion constants of oxygen in pure tantalum and niobium and in alloys by electrical resistivity measurement

Evidence for a long-lived superheavy nucleus with atomic mass number A=292 and atomic number Z=~122 in natural Th

Evidence for the existence of a superheavy nucleus with atomic mass number A=292 and abundance (1-10)x10^(-12) relative to 232Th has been found in a study of natural Th using inductively coupled plasma-sector field mass spectrometry. The measured mass matches the predictions [1,2] for the mass of an isotope with atomic number Z=122 or a nearby element. Its estimated half-life of t1/2 >= 10^8 y suggests that a long-lived isomeric state exists in this isotope. The possibility that it might belong to a new class of long-lived high spin super- and hyperdeformed isomeric states is discussed.[3-6]Comment: 14 pages, 5 figure