Results 21 to 30 of about 1,198,046 (263)

Gallbladder carcinoma: an initial clinical experience of reduced field-of-view diffusion-weighted MRI

open access: yesCancer Imaging, 2020
Background The purpose of this study is to compare the diagnostic value, imaging quality and apparent diffusion coefficient (ADC) value of reduced field-of-view diffusion-weight imaging (r-FOV DWI) and full field-of-view diffusion-weight imaging (f-FOV ...
Sisi Wu   +5 more
doaj   +1 more source

Prokaryotic Community Structure and Metabolisms in Shallow Subsurface of Atacama Desert Playas and Alluvial Fans After Heavy Rains: Repairing and Preparing for Next Dry Period

open access: yesFrontiers in Microbiology, 2019
The Atacama Desert, the oldest and driest desert on Earth, displays significant rains only once per decade. To investigate how microbial communities take advantage of these sporadic wet events, we carried out a geomicrobiological study a few days after a
Miguel Ángel Fernández-Martínez   +13 more
doaj   +1 more source

Exploring the Connection between Helioseismic Travel Time Anomalies and the Emergence of Large Active Regions during Solar Cycle 24

open access: yesThe Astrophysical Journal, 2023
We investigate deviations in the mean phase travel time of acoustic waves preceding the emergence of 46 large active regions observed by the Helioseismic and Magnetic Imager.
John T. Stefan, Alexander G. Kosovichev
doaj   +1 more source

Three Dimensional Nonlinear Guidance Law for Exact Impact Time Control

open access: yesIEEE Access, 2022
This paper presents a nonlinear guidance law for controlling the impact time of a missile-target engagement in three dimensions. The guidance law is initially formulated for a two-dimensional encounter before being extended to a three-dimensional ...
Abdul Saleem, E. R. Lisy
doaj   +1 more source

A Study of the Field of View Performance for Full-Color Waveguide Displays Based on Polarization Volume Gratings

open access: yesCrystals, 2022
Multilayer waveguide structures can realize full-color AR displays of diffractive waveguides. This paper discusses the field-of-view characteristics of a waveguide system with a multilayer structure when polarization volume gratings (PVG) are applied as ...
Yuchen Gu   +8 more
doaj   +1 more source

Gap Affordance Judgments in Mixed Reality: Testing the Role of Display Weight and Field of View

open access: yesFrontiers in Virtual Reality, 2021
Measures of perceived affordances—judgments of action capabilities—are an objective way to assess whether users perceive mediated environments similarly to the real world.
Holly C. Gagnon   +6 more
doaj   +1 more source

An Automatic Calibration Method for the Field of View Aberration in a Risley-Prism-Based Image Sensor

open access: yesSensors, 2023
Risley-prism-based image sensors can expand the imaging field of view through beam control. The larger the top angle of the prism, the higher the magnification of the field of view, but at the same time, it aggravates the problem of imaging aberrations ...
Zhonglin Lin   +6 more
doaj   +1 more source

The Maximum Cover with Rotating Field of View

open access: yesJournal of Mathematical Imaging and Vision, 2023
Abstract In this paper, we address the maximum cover problem of a rotating field of view (FOV) with a convex polygon $$\mathcal {P}$$ P with n vertices. The problem is defined as determining the optimal rotation angle
Igor Potapov   +2 more
openaire   +2 more sources

Mapping Burned Areas in Tropical Forests Using a Novel Machine Learning Framework

open access: yesRemote Sensing, 2018
This paper presents an application of a novel machine-learning framework on MODIS (moderate-resolution imaging spectroradiometer) data to map burned areas over tropical forests of South America and South-east Asia.
Varun Mithal   +5 more
doaj   +1 more source

Lightguide type Maxwellian near-eye display with enlarged horizontal field of view by optical reconfiguration of input image

open access: yesJournal of Information Display, 2022
We present a novel design of the lightguide type optical see-through Maxwellian near-eye display. The proposed display reconfigures vertically long input images to horizontally long output images for wide horizontal viewing-angle.
Woongseob Han   +3 more
doaj   +1 more source

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