Engineering topics

Smith, Phil

Publications and source records attributed to Smith, Phil.

7 records

DOE OSTI2022

A Roadmap for Quantum Interconnects

Created by Q-NEXT, a U.S. Department of Energy (DOE) National Quantum Information Science Research Center, this document is a roadmap for quantum interconnects research and its impact for quantum information science and technology. It is the outcome of the collective work of a large team of Q-NEXT members and participants from academia, industry and DOE national laboratories. The roadmap addresses the role of quantum interconnects in three emerging areas of quantum information: computing, communication and sensing. It reviews the materials, components and systems used for these purposes; summarizes relevant scientific questions and issues; and addresses the most pressing research needs. The document then distills these considerations into recommendations for strategic science and technology research imperatives for the next decade. In addition to informing Q-NEXT’s internal activities, the roadmap has also been created with a broader objective of developing a guide for key issues and research needed over the next decade for the worldwide scientific and engineering community interested in quantum information.

42 ENGINEERING↗

DOE OSTI2019

A Practical Guide for Use Of Real Time Detection Systems For Worker Protection And Compliance With Occupational Exposure Limit

This white paper presents practical guidance for field industrial hygiene personnel in the use and application of real time detection systems (RTDS) for exposure monitoring. The focus of the paper is on protection of worker health with solid exposure decisions based on occupational exposure limits (OELs), while successfully managing compliance with applicable regulations. This paper discusses occupational exposure assessment, OELs, traditional use of RTDS, use and limitations of RTDS, use of RTDS for compliance, documentation and reporting of RTDS results. It provides practical matrices for real time monitoring decisions, and a data collection and interpretation worksheet. The paper also addresses the use of professional judgement as it relates to RTDS use.

61 RADIATION PROTECTION AND DOSIMETRY↗

NASA NTRS2011

Large Aperture, Scanning, L-Band SAR

We have developed the first L-band membrane-based active phased array. The antenna is a 16x16 element patch array with dimensions of 2.3mx2.6m. The array uses membrane-compatible Transmit/Receive (T/R) modules for electronic beam steering. We will discuss the antenna design, the fabrication of this large array, the T/R module development, the signal distribution approach and the measured results of the array

phased array↗

NASA NTRS2011

Large Aperture, Scanning, L-Band SAR

defense related phased array↗

NASA NTRS2005

Aperture-coupled thin-membrane microstrip array antenna for beam scanning application

A microstrip array using aperture-slot-coupling technique with very thin membranes has been developed at the L-band frequency for beam scanning application. This technology-demonstration array with 4 x 2 elements achieved a relatively wide bandwidth of 100 MHz (8%) and +/-45(deg) beam scan. Very narrow coupling slots were used with each having an aspect ratio of 160 (conventional slot aspect ratio is between 10 to 30) for coupling through very thin membrane (0.05mm thickness). This thin-membrane aperture-coupling technique allows the array antenna elements to be more easily integrated with transmit/receive amplifier (T/R) and phase shifter modules. This paper addresses only the radiator portion of the array. The array and active components will be presented in a separate pape.

array antenna↗

NASA NTRS2005

Active membrane phased array radar

We have developed the first membrane-based active phased array in L-band (1.26GHz). The array uses membrane compatible Transmit/Receive (T/R) modules (membrane T/R) for each antenna element. We use phase shifters within each T/R module for electronic beam steering. We will discuss the T/R module design and integration with the membrane, We will also present transmit and receive beam-steering results for the array.

membrane arrays↗

NASA NTRS1993

Distributed problem solving by pilots and dispatchers

The study addressed the following question: Are flight planning problems solved differently by PILOTS and DISPATCHERS when they work alone versus when they work together? Aspect of their performance that were of interest include the following: Problem perception and definition; Problem solving strategies and information use; Options considered; Solution and rational; and errors.

Orasanu, Judith↗