Cold atom quantum simulator for dilute neutron matter

The internal structure of neutron stars and the physical properties of nuclei depend on the equation of state (EOS) of neutron matter. Dilute neutron matter is a quantum system of spin-1/2 Fermi particles interacting via s-wave scattering. Although a nuclear system and an ultracold atomic system have length scales and energy scales that differ by several orders of magnitude, both systems follow a common universal EOS considering their nondimensional universal interaction parameters. In this study, we determine the EOS of neutron matter in the dilute region, where the influence of the s-wave scattering length is dominant but that of the effective range is small, by utilizing a quantum simulator of ultracold 6Li atoms with Feshbach resonance.

The Interaction Stability Analysis of a Multi-Inverter System Containing Different Types of Inverters

The existing stability investigations of the system containing different types of inverters are insufficient. The paper aims to reveal the more universal interaction stability mechanism of the system containing different types of inverters. Firstly, the multi-inverter system is decomposed into an admittance network (AN) and excitation sources. Then, the interaction between two different inverters, as well as the interaction between the inverter and the power grid, are analyzed by the root locus method. This reveals that the stability of the interaction between the inverter and the power grid is exclusively determined by AN. However, the stability of the interaction between different inverters not only depends on AN but also relies on whether the two inverters have common right-half plane (RHP) poles. To make the multi-inverter system stable, the following two criteria must be satisfied: (a) AN is stable and (b) any two different inverters do not have the same RHP poles. If criterion (a) is not satisfied, the harmonic resonance will arise in all currents. Resonant harmonics will only circulate among partial inverters and will not inject into the power grid if criterion (a) is satisfied but criterion (b) is not satisfied. Theoretical analysis is validated by simulation and experiment results.

Beyond autism and technology: lessons from neurodiverse populations

Purpose The purpose of this paper is to report on the sixth seminar in a seven-seminar series entitled, Innovative Technologies for Autism: Critical Reflections on Digital Bubbles, funded by the UK Economic and Social Research Council. The aim of this particular seminar was to reflect upon the implications from neurodiverse communities for the development of technology for autism. Design/methodology/approach Presentations from key researchers and parental perspectives are reviewed, highlighting contemporary issues in neurodiverse populations that have important implications for autism. Findings Whilst there are many conditions associated with autism, most commonly intellectual disability (learning difficulties), this is not reflected in research. In addition, for child-based research, researchers are at least a generation older than participants and have had different digital-childhoods. Involving neurodiverse populations within participatory design sessions can address both of these issues. Understanding the context of the issues that the participatory design sessions address is crucial for developing participatory design principles that extend from one condition to another. This includes understanding when findings based upon verbal populations can be extended to non-verbal populations. Originality/value This paper offers up-to-date insights into how design principles from one condition extend to different conditions. Universal interaction and neurodiversity HCI are considered. This is important within neurodiverse populations, especially given the high rates of additional conditions that are associated with autism. Whilst the majority of autism research has involved verbal populations, the benefits of technology can extend to non-verbal populations.

Application of Reusable Framework Technology on the Workflow System

Focus on workflow task duplication of information processing in the interface of the show, interact with applications and other complex technical difficulties, the paper design and implement tasking reusable framework technology, to enhance the flexibility of workflow system, while reducing the complexity of the task processing , in order to carry out the system development and maintenance. Establishing a common framework for the design task processing, to process basic tasks, task processing applications each parameterized configuration variable part, by explaining the configuration items, dynamically generated parameters interface and back-office services, so as to realize the application system and workflow platform universal interaction.