Surging interests exist in double-atom catalysts (DACs), which not only inherit the advantages of single-atom (SACs) (e.g., ultimate atomic utilization, high activity, and selectivity) but also overcome drawbacks SACs low loading isolated active site). The design DACs, however, remains cost-prohibitive for both experimental computational studies, due to their huge space. Herein, by means densit...

Electrochemical clean energy conversion and the production of sustainable chemicals are critical in journey to realizing a truly society. To progress electrochemical storage devices commercialization, improving electrocatalyst performance cost utmost importance. Research into dual-metal atom catalysts (DACs) is rising prominence due advantages these sites over single-metal (SACs), such as break...

The mature vertebrate retina is a highly ordered neuronal network of cell bodies and synaptic neuropils arranged in distinct layers. Little, however, is known about the emergence of this spatial arrangement. Here, we investigate how the three main types of retinal inhibitory neuron (RIN) – horizontal cells (HCs), inner nuclear layer amacrine cells (iACs) and displaced amacrine cells (dACs) – re...

We model the detailed time-evolution of Discrete Absorption Components (DACs) observed in P Cygni profiles of the Si iv λ1400 resonance doublet lines of the fast-rotating supergiant HD 64760 (B0.5 Ib). We adopt the common assumption that the DACs are caused by Co-rotating Interaction Regions (CIRs) in the stellar wind. We perform 3D radiative transfer calculations with hydrodynamic models of th...

Digital-to-analog (D/A) converters (or DACs) are one the fundamental building blocks of wireless transmitters. In order to support the increasing demand for high-data-rate communication, a large bandwidth is required from the DAC. With the advances in CMOS scaling, there is an increasing trend of moving a large part of the transceiver functionality to the digital domain in order to reduce the a...

2 Draft two updated Argo mission statements: one for Argo and one for ABE-LOS purposes. Circulate the statement among AST members for approval. M. Belbéoch to circulate the updated Argo mission statement to ABE-LOS. A proposal is being drafted by Ann Thresher on new technical parameters to be added to technical files. When the proposal is finished, the AST requests the DACs to review it and mak...

This paper describes the design and experimental evaluation of a multibit Sigma-Delta (ΣΔ) modulator (ΣΔM) with enhanced dynamic range (DR) through the use of nonlinear digital-to-analog converters (DACs) in the feedback paths. This nonlinearity imposes a trade-off between DR and distortion, which is well suited to the intended hearing aid application. The modulator proposed here uses a fully-d...

We study multi-user massive multiple-input singleoutput (MISO) systems and focus on downlink transmission, where the base station (BS) employs a large antenna array with low-cost 1-bit digital-to-analog converters (DACs). The direct combination of existing beamforming schemes with 1-bit DACs is shown to lead to an error floor at medium-to-high SNR regime, due to the coarse quantization of the D...