Measurement and Reduction of Dynamical Mechanical Parameters of Aqueous Solutions of Milling Yellow Dye

Physic

Isolation and Characterization of Six Novel \u3cem\u3eRhodobacter Capsulatus\u3c/em\u3e Bacteriophages

Poster presentation abstract

Transcript Inglis Clark’s 1888 ‘Memorandum’ on Chinese Immigration Introduction and commentary by Richard Ely

Transcript Inglis Clark’s 1888 ‘Memorandum’ on Chinese Immigration Introduction and commentary by Richard El

Airborne RF Measurement System and Analysis of Representative Flight RF Environment

Environmental radio frequency (RF) data over a broad band of frequencies were needed to evaluate the airspace around several airports. An RF signal measurement system was designed using a spectrum analyzer connected to an aircraft VHF/UHF navigation antenna installed on a small aircraft. This paper presents an overview of the RF measurement system and provides analysis of a sample of RF signal measurement data over a frequency range of 30 MHz to 1000 MHz

Boron-Lined Straw-Tube Neutron Detector Test

Radiation portal monitors used for interdiction of illicit materials at borders include highly sensitive neutron detection systems. The main reason for having neutron detection capability is to detect fission neutrons from plutonium. The currently deployed radiation portal monitors (RPMs) from Ludlum and Science Applications International Corporation (SAIC) use neutron detectors based upon 3He-filled gas proportional counters, which are the most common large neutron detector. There is a declining supply of 3He in the world, and thus, methods to reduce the use of this gas in RPMs with minimal changes to the current system designs and sensitivity to cargo-borne neutrons are being investigated. Four technologies have been identified as being currently commercially available, potential alternative neutron detectors to replace the use of 3He in RPMs. Reported here are the results of tests of a boron-lined proportional counter design variation. In the testing described here, the neutron detection efficiency and gamma ray rejection capabilities of a system manufactured by Proportional Technologies, Inc, was tested