Investigation of multilayer magnetic domain lattice file

A theoretical and experimental investigation determined that current accessed self structured bubble memory devices have the potential of meeting projected data density and speed requirements. Device concepts analyzed include multilayer ferrimagnetic devices where the top layer contains a domain structure which defines the data location and the second contains the data. Current aperture and permalloy assisted current propagation devices were evaluated. Based on the result of this work more detailed device research was initiated. Detailed theoretical and experimental studies indicate that the difference in strip and threshold between a single bubble in the control layer and a double bubble which would exist in both the control layer and data layer is adequate to allow for detection of data. Detailed detector designs were investigated

Tree-oriented interactive processing with an application to theorem-proving, appendix E

The concept of unstructured structure editing and ted, an editor for unstructured trees, is described. Ted is used to manipulate hierarchies of information in an unrestricted manner. The tool was implemented and applied to the problem of organizing formal proofs. As a proof management tool, it maintains the validity of a proof and its constituent lemmas independently from the methods used to validate the proof. It includes an adaptable interface which may be used to invoke theorem provers and other aids to proof construction. Using ted, a user may construct, maintain, and verify formal proofs using a variety of theorem provers, proof checkers, and formatters

Investigation of multilayer magnetic domain lattice file

The feasibility of the self structured multilayered bubble domain memory as a mass memory medium for satellite applications is examined. Theoretical considerations of multilayer bubble supporting materials are presented, in addition to the experimental evaluation of current accessed circuitry for various memory functions. The design, fabrication, and test of four device designs is described, and a recommended memory storage area configuration is presented. Memory functions which were demonstrated include the current accessed propagation of bubble domains and stripe domains, pinning of stripe domain ends, generation of single and double bubbles, generation of arrays of coexisting strip and bubble domains in a single garnet layer, and demonstration of different values of the strip out field for single and double bubbles indicating adequate margins for data detection. All functions necessary to develop a multilayer self structured bubble memory device were demonstrated in individual experiments

Quantum battery charging by non-equilibrium steady-state currents

We present an analysis of the availability and maximum extractable work of quantum batteries in the presence of charge and/or heat steady-state currents. Quantum batteries are modelled as non-interacting open quantum systems (mesoscopic systems) strongly coupled to two thermal and particle reservoirs within the framework of non-equilibrium Green's function theory in a steady-state regime. We found that the battery can be charged manifestly by a steady-state charge current compared to heat one, especially, in an off-resonant transport regime. It allows us to reliably access the performance of the quantum batteries in the high bias-charging regime.Comment: new Refs. adde

Integration factors of green skills into building construction trade programme in Nigeria

Technical and vocational education and training (TVET) remains a vital tool for skilling young individuals both in and out of school. However, it appears that there has been a lack of research especially in the building construction sector with respect to green buildings in Nigeria. The main purpose of this research paper is to identify factors should be included in the greening of building construction trade curriculum of technical colleges in north western Nigeria with a view to improving teaching and learning green skills for sustainable development. In this study, simple random sampling was used to select 15 building construction teachers in the north western Nigerian technical colleges. Data for this study were collected using qualitative approach (that is interview). Respondents were requested to answer the interview questions based on the topic under study. The factors (data) identified from the perception of the respondents were collected and analysed by qualitative means based on their level of consideration with regards to improving teaching and learning green skills for sustainable development. In doing so, the data were analysed by transcription, coding, content analysis and thematic with the aid of Nvivo statistical software. Findings indicated that the three main factors that could be included in the integration of green skills into the curriculum of building construction trade include environmental, economic and social factors. Specifically, these factors were disintegrated into climate change, global warming, greenhouse gas emission, economic instability, health and safety issues related to buildings, waste and energy in buildings. This research forms the initial investigation of a more in-depth study of the green skills integration into the Nigerian education curriculum, which aims to achieving environmental, economic and social sustainability