Radiation effects on silver and zinc battery electrodes, II Interim report, Jul. - Oct. 1965

Radiation effects on silver and zinc electrodes in silver-zinc batter

Radiation effects on silver and zinc battery electrodes, i interim report, apr. - jul. 1965

Radiation effects on silver and zinc battery electrode

The effects of radiation on nickel-cadmium battery electrodes, i final report, jun. 1963 - apr. 1965

Effect of radiation on nickel-cadmium battery electrode

Solubility studies of ultra pure transition elements in ultra pure alkali metals

Solubility of pure iron, molybdenum, niobium, and tantalum in liquid potassiu

The Cepheid Impostor HD 18391 and its Anonymous Parent Cluster

New and existing photometry for the G0 Ia supergiant HD 18391 is analyzed in order to confirm the nature of the variablity previously detected in the star, which lies off the hot edge of the Cepheid instability strip. Small-amplitude variability at a level of \Delta V = 0.016+-0.002 is indicated, with a period of P=123.04+-0.06 d. A weaker second signal may be present at P=177.84+-0.18 with \Delta V = 0.007+-0.002, likely corresponding to fundamental mode pulsation if the primary signal represents overtone pulsation (123.04/177.84 = 0.69). The star, with a spectroscopic reddening of E(B-V) = 1.02, is associated with heavily-reddened B-type stars in its immediate vicinity that appear to be outlying members of an anonymous young cluster centered ~10 arcmin to the west and 1661+-73 pc distant. The cluster has nuclear and coronal radii of r_n=3.5 arcmin and R_c=14 arcmin, respectively, while the parameters for HD 18391 derived from membership in the cluster with its outlying B stars are consistent with those implied by its Cepheid-like pulsation, provided that it follows the semi-period-luminosity relation expected of such objects. Its inferred luminosity as a cluster member is M_V=-7.76+-0.10, its age (9+-1)x10^6 years, and its evolutionary mass ~19 M_{\sun}. HD 18391 is not a classical Cepheid, yet it follows the Cepheid period-luminosity relation closely, much like another Cepheid impostor, V810 Cen.Comment: Accepted for Publication (Astronomische Nachrichten

Seeking sanctum, a space for healing

Bearing witness to domestic violence and the crippling nature of trauma drives the interest in designing healing spaces for women and children. A person of inspiration and countless similar stories have resulted in the dissertation topic of a sanctuary, for women and children, as a space of healing and protection. The proposal is informed by research into feminist perspectives on space-making, phenomenology as a design tool to bring meaning to spaces, and responsive architecture as a way of deeply understanding and responding to site, context, and the community in an impactful and connected way. Two key issues are highlighted from the research and experiences of others, firstly that of needing to provide a space that feels homely and safe, not sterile and clinical, and secondly, that of providing access to facilitated healing and empowerment: with access to support, skills training, workspaces, connections, and nature. The resulting proposal is situated in Hout Bay, adjacent to a wetland, offering accessibility, access to nature, as well as an inherent sense of sanctuary. The design explores the juxtaposition between protection and openness by layering spaces to offer varying degrees of privacy, also using materials to explore solidity and transparency, heaviness, and lightness. Protective thresholds frame and enclose spaces, giving way to openness. Grounded programme is contrasted by the lifting of the most private spaces. More broadly the juxtaposition between public and very private is also explored, where the normative practice of radically disconnecting healing process from ‘normal' daily life is challenged. Important to the design as a whole is for the sanctuary to offer nurturing to both the inhabitants and to the landscape