Design, Assembly, Calibration, and Measurement of an Augmented Reality Haploscope

A haploscope is an optical system which produces a carefully controlled virtual image. Since the development of Wheatstone's original stereoscope in 1838, haploscopes have been used to measure perceptual properties of human stereoscopic vision. This paper presents an augmented reality (AR) haploscope, which allows the viewing of virtual objects superimposed against the real world. Our lab has used generations of this device to make a careful series of perceptual measurements of AR phenomena, which have been described in publications over the previous 8 years. This paper systematically describes the design, assembly, calibration, and measurement of our AR haploscope. These methods have been developed and improved in our lab over the past 10 years. Despite the fact that 180 years have elapsed since the original report of Wheatstone's stereoscope, we have not previously found a paper that describes these kinds of details.Comment: Accepted and presented at the IEEE VR 2018 Workshop on Perceptual and Cognitive Issues in AR (PERCAR); pre-print versio

Peripheral Visual Information and Its Effect on the Perception of Egocentric Depth in Virtual and Augmented Environments

ABSTRACT A frequently observed problem in virtual environments is the underestimation of egocentric depth. This problem has been described numerous times and with widely varying degrees of severity. Though there has been considerable progress made in modifying observer behavior to compensate for these misperceptions, the question of why these errors exist is still an open issue. The study detailed in this document presents the preliminary findings of a large, between-subjects experiment (N=98) that attempts to identify and quantify the source of a pattern of adaptation and improved accuracy in the absence of explicit feedback found in Jones et al

Show me how you see: Lessons from studying computer forensics experts for visualization

Abstract. As part of a Analyze-Visualize-Validate cycle, we have initiated a domain analysis of email computer forensics to determine where visualization may be beneficial. To this end, we worked with police officers and other forensics professionals. However, the process of designing and executing such a study with real-world experts has been a non-trivial task. This paper presents our efforts in this area and the lessons learned as guidance to other practitioners

Single-cell enabled comparative genomics of a deep ocean SAR11 bathytype

Bacterioplankton of the SAR11 clade are the most abundant microorganisms in marine systems, usually representing 25% or more of the total bacterial cells in seawater worldwide. SAR11 is divided into subclades with distinct spatiotemporal distributions (ecotypes), some of which appear to be specific to deep water. Here we examine the genomic basis for deep ocean distribution of one SAR11 bathytype (depth-specific ecotype), subclade Ic. Four single-cell Ic genomes, with estimated completeness of 55%–86%, were isolated from 770 m at station ALOHA and compared with eight SAR11 surface genomes and metagenomic datasets. Subclade Ic genomes dominated metagenomic fragment recruitment below the euphotic zone. They had similar COG distributions, high local synteny and shared a large number (69%) of orthologous clusters with SAR11 surface genomes, yet were distinct at the 16S rRNA gene and amino-acid level, and formed a separate, monophyletic group in phylogenetic trees. Subclade Ic genomes were enriched in genes associated with membrane/cell wall/envelope biosynthesis and showed evidence of unique phage defenses. The majority of subclade Ic-specfic genes were hypothetical, and some were highly abundant in deep ocean metagenomic data, potentially masking mechanisms for niche differentiation. However, the evidence suggests these organisms have a similar metabolism to their surface counterparts, and that subclade Ic adaptations to the deep ocean do not involve large variations in gene content, but rather more subtle differences previously observed deep ocean genomic data, like preferential amino-acid substitutions, larger coding regions among SAR11 clade orthologs, larger intergenic regions and larger estimated average genome size.This is the publisher’s final pdf. The article is copyrighted by the International Society for Microbial Ecology and published by the Nature Publishing Group. It can be found at: http://www.nature.com/ismej/index.htm

Identifying the science and technology dimensions of emerging public policy issues through horizon scanning

Public policy requires public support, which in turn implies a need to enable the public not just to understand policy but also to be engaged in its development. Where complex science and technology issues are involved in policy making, this takes time, so it is important to identify emerging issues of this type and prepare engagement plans. In our horizon scanning exercise, we used a modified Delphi technique [1]. A wide group of people with interests in the science and policy interface (drawn from policy makers, policy adviser, practitioners, the private sector and academics) elicited a long list of emergent policy issues in which science and technology would feature strongly and which would also necessitate public engagement as policies are developed. This was then refined to a short list of top priorities for policy makers. Thirty issues were identified within broad areas of business and technology; energy and environment; government, politics and education; health, healthcare, population and aging; information, communication, infrastructure and transport; and public safety and national security.Public policy requires public support, which in turn implies a need to enable the public not just to understand policy but also to be engaged in its development. Where complex science and technology issues are involved in policy making, this takes time, so it is important to identify emerging issues of this type and prepare engagement plans. In our horizon scanning exercise, we used a modified Delphi technique [1]. A wide group of people with interests in the science and policy interface (drawn from policy makers, policy adviser, practitioners, the private sector and academics) elicited a long list of emergent policy issues in which science and technology would feature strongly and which would also necessitate public engagement as policies are developed. This was then refined to a short list of top priorities for policy makers. Thirty issues were identified within broad areas of business and technology; energy and environment; government, politics and education; health, healthcare, population and aging; information, communication, infrastructure and transport; and public safety and national security

In-pile loop irradiation studies of organic coolant materials : quarterly progress report, July 1-September 30, 1963

Statement of responsibility on title page reads: Report prepared by: E. A. Mason, Project Supervisor W. N. Bley, Project Engineer; Contributors: C. D. Sawyer A. H. Swan, R. A. Chin, J. P. Casey J. F. Terrien G. C. Nullens"Issued: December 15, 1963.""AEC Research and Development Report"--Cover"SRO-85."Includes bibliographical references (leaf 24)Quarterly progress report; July 1-September 30, 1963M.I.T. Project No. DSR 9819U.S. Atomic Energy Commission, Savannah River Operations Office Contract no. AT(38-1)-33