Stress corrosion cracking of titanium alloys at ambient temperature in aqueous solutions Progress report, Jun. - Aug. 1966

Stress corrosion cracking of titanium alloys at ambient temperature in aqueous solutio

X-Ray Microanalysis with the Environmental Scanning Electron Microscope: Interpretation of Data Obtained Under Different Atmospheric Conditions

X-ray microanalysis of non-biological and biological specimens was carried out in an environmental scanning electron microscope (ESEM) over a range of atmospheric conditions. Introduction of water vapour into the specimen chamber lead to direct X-ray contribution from oxygen atoms, an increase in extraneous background (causing reduced P/B ratios of other elements), X-ray absorption (also reducing P/B ratios) and broadening (skirting) of the electron beam. Similar results were obtained after introduction of an argon atmosphere. These effects were reduced under conditions of minimal chamber atmospheric pressure and maximal accelerating voltage. Because of beam skirting, quantitative X-ray microanalysis of biological specimens in a water vapour atmosphere was only valid where the sample was spread over a wide area (leading to mean elemental values for the whole preparation). Unless appropriate correction factors or changes in instrumentation can be implemented, quantitative analysis of wet specimens in ESEM cannot be applied to discrete specimens or to limited areas within a mixed sample

Shigella Draft Genome Sequences: Resources for Food Safety and Public Health.

Shigella is a major foodborne pathogen that infects humans and nonhuman primates and is the major cause of dysentery and reactive arthritis worldwide. This is the initial public release of 16 Shigella genome sequences from four species sequenced as part of the 100K Pathogen Genome Project

Identification of Kentucky Shales

Results obtained from a series of engineering tests performed on 40 different types of shales are summarized and discussed. Both hard and soft shales, as well as shales having well-documented histories of involvement in highway embankment failures and shales having little known involvement, were tested. A major portion of the report examines the suitability of the slake-durability tests, originally devised by Franklin-Chandra of England, as a means of broadly characterizing the engineering properties of Kentucky shales. Results obtained from ten different slake-durability testing procedures, which include procedures proposed by Franklin and Chandra and others as well as procedures devised during the study, were compared. Two procedures devised during the study appear to better characterize slake-durability properties of shales than procedures previously proposed. Natural water contents and jar slake tests were performed to determine if such tests might provide a fairly rapid means of identifying troublesome shales. The natural water content of a shale is a strong indicator of the slake-durability properties. Comprehensive mineral analyses were performed. Only a slight relationship between engineering performance and mineral composition was found. Most notably, montmorillonite was not present in any of the selected shales. Swelling properties of ten shale types were examined. A good correlation was obtained between a newly devised slake-durability index and the water content of a shale after swelling was completed. When exposed to water, most of the shales exhibited high swell pressures. Particle-size determinations, specific gravity tests, and Atterberg limits were performed. Correlations obtained from these tests and slake durability indices are described. Hardness characteristics of the shales were studied using the Shore scleroscope

In Search of the Real Mary Chestnut

Histor

Stress corrosion cracking of titanium alloys at ambient temperature in aqueous solutions

Stress corrosion tests of titanium alloys in distilled and aqueous salt solutions at ambient temperatures employing single edge notched specimen

Stress corrosion cracking of titanium alloys at ambient temperature in aqueous solutions Quarterly progress report, 1 Jan. - 31 Mar. 1967

Stress corrosion cracking of titanium alloys at ambient temperature in aqueous solution

Proceedings of the Tenth Annual Conference on Advances in Cognitive Systems

We hope you will enjoy these proceedings of the Tenth Annual Conference on Advances in Cognitive Systems (ACS). The event was the first hybrid meeting of ACS in is history. It took place virtually via Zoom and physically at George Mason University in Arlington, Virginia, from Saturday, November 19, to Tuesday, November 22, 2022. We are so delighted to be part of continuing this important venue that focuses on the original long-standing goals and challenges of artificial intelligence research. The conference program consisted of 37 papers consisting of ten 30-minute long talks, fifteen 20-minute short talks, twelve posters, three invited talks, two workshops, and a community panel discussion. This year’s Simon Prize Lecture was delivered by Anthony Cohn, Professor of Automated Reasoning at the University of Leeds. More than 200 people attended both in person and virtually. We were fortunate to have the organizational contributions of our local chair, Mihai Boicu of George Mason University, and of the members of the ACS Organizing Committee: Paul Bello, Pat Langley, Sergei Nirenburg, and Matt Klenk. We also thank Mark Burstein, Ken Forbus, Henry Lieberman, Marge McShane, John Laird, and Alexis Kilayko for their many suggestions and contributions. Finally we thank our sponsors, Smart Information Flow Technologies (SIFT) and George Mason University\u27s Institute for Digital Innovation. The latter provided space and technical support that allowed us to produce a high-quality in-person and virtual event. We invite you to visit the Advances in Cognitive Systems YouTube channel (https://www.youtube.com/ @advancesincognitivesystems4184) which has videos of the presentations, invited talks, tutorials, and the panel discussion. -- Jamie C. Macbeth, Leilani Gilpin and Michael T. Cox 13 January 202

Monitoring Scene Understanders with Conceptual Primitive Decomposition and Commonsense Knowledge

Although there have been many key advancements in connecting text and perception, computer- generated image captions still lack common sense. As a first step towards constraining these perception mechanisms to commonsense judgment, we have developed reasonableness monitors: a wrapper interface that can explain if the descriptive output of an opaque deep neural network is plausible. These monitor a standalone system that uses careful dependency tracking, commonsense knowledge, and conceptual primitives to explain a perceived scene description to be reasonable or not. If such an explanation cannot be made, it is evidence that something unreasonable has been perceived. The development of reasonableness monitors is work towards generalizing that vision, with the intention of developing a system-construction methodology that enhances robustness at run time by dynamic checking and explaining of the behaviors of scene understanders for reasonableness in contex

Evaluation of conventional and molecular strategies for the rapid diagnosis and molecular characterisation of strains of Mycobacterium tuberculosis

Laboratory diagnosis of tuberculosis is often difficult and time consuming. This study has evaluated some new strategies for improved isolation and detection of Mycobacterium tuberculosis in clinical specimens. This work was conducted over several years examining samples from the a high tuberculosis prevalence population in Jeddah, Saudi Arabia and in the low tuberculosis prevalence setting in Queensland, Australia. Commercial nucleic acid amplification technologies were evaluated and compared with in-house real-time quantitative PCR strategies for both pulmonary and extrapulmonary specimens and for paraffin embedded tissue samples. The study examined strategies for the detection of multidrug resistance strains through the use of Lipa assay to detect mutations in the rpoB gene. Variable numbers of tandem DNA repeat (VNTR) typing was applied to samples from Saudi Arabia and Queensland, Australia to assess their discriminatory power and to demonstrate the diversity and uniqueness of strains of M. tuberculosis in distinct geographical regions. A combination of VNTR typing targeting six ETR loci and an additional three polymorphic MIRU loci was applied to a strains of MTB to enhance discrimination of strains. The results demonstrated that culture remains the "gold standard" for diagnosis and that a liquid culture system is essential for timely isolation of mycobacteria. Direct nucleic acid techniques are valuable diagnostic tools in samples where AFBs can be demonstrated but have markedly reduced sensitivity in AFB smear negative MTB culture positive samples. A combination of VNTR and MIRU typing provides excellent discrimination of strains of Mycobacterium tuberculosis. This stable typing strategy relies on PCR which allows for real-time epidemiology of transmission to be monitored.EThOS - Electronic Theses Online ServiceGBUnited Kingdo