Results 61 to 70 of about 1,285,259 (263)

A model of head direction and landmark coding in complex environments.

open access: yesPLoS Computational Biology, 2021
Environmental information is required to stabilize estimates of head direction (HD) based on angular path integration. However, it is unclear how this happens in real-world (visually complex) environments.
Yijia Yan, Neil Burgess, Andrej Bicanski
doaj   +1 more source

Mobile Bearing Total Knee Arthroplasty for Valgus Knee Osteoarthritis with Permanent Patellar Dislocation: A Case Report and Review of the Literature

open access: yesCase Reports in Orthopedics, 2017
Permanent patellar dislocation with tibiofemoral joint osteoarthritis is a relatively rare condition. To treat this condition, total knee arthroplasty with proximal or distal realignment of the extensor mechanism has been reported.
Kohei Kamada   +7 more
doaj   +1 more source

Robust Stereo Visual Inertial Navigation System Based on Multi-Stage Outlier Removal in Dynamic Environments

open access: yesSensors, 2020
Robotic mapping and odometry are the primary competencies of a navigation system for an autonomous mobile robot. However, the state estimation of the robot typically mixes with a drift over time, and its accuracy is degraded critically when using only ...
Dinh Van Nam, Kim Gon-Woo
doaj   +1 more source

Exploring haptic interfacing with a mobile robot without visual feedback [PDF]

open access: yes, 2012
Search and rescue scenarios are often complicated by low or no visibility conditions. The lack of visual feedback hampers orientation and causes significant stress for human rescue workers. The Guardians project [1] pioneered a group of autonomous mobile
Jones, Peter E., Penders, Jacques
core   +1 more source

WLS algorithm for UAV navigation in satellite‐less environments

open access: yesIET Wireless Sensor Systems, 2022
This work addresses one of the major challenges in the field of Unmanned Aerial Vehicles (UAVs), which is related to UAV navigation in 3‐dimensional indoor environments. This topic is highly relevant due to limited‐to‐no availability of satellite signals
Ricardo Santos   +3 more
doaj   +1 more source

Analysis, Mathematical Model and Selected Simulation Research of the GNSS Navigation Receiver Correlator

open access: yesMATEC Web of Conferences, 2018
The article presents a mathematical model describing the physical phenomena occurring in the GNSS radio receiver. The main subunit which focused attention was the system of GNSS receiver correlator.
Setlak Lucjan, Kowalik Rafał
doaj   +1 more source

In vivo tumor detection with combined MR–Photoacoustic-Thermoacoustic imaging [PDF]

open access: yesJournal of Innovative Optical Health Sciences, 2016
Here, we report a new method using combined magnetic resonance (MR)–Photoacoustic (PA)–Thermoacoustic (TA) imaging techniques, and demonstrate its unique ability for in vivo cancer detection using tumor-bearing mice.
Lin Huang   +9 more
doaj   +1 more source

General aviation single pilot IFR autopilot study [PDF]

open access: yes, 1983
Five levels of autopilot complexity were flown in a single engine IFR simulation for several different IFR terminal operations. A comparison was made of the five levels of complexity ranging from no autopilot to a fully coupled lateral and vertical ...
Bergeron, H. P.
core   +1 more source

A Novel Fault Diagnosis Method Based on Noise-Assisted MEMD and Functional Neural Fuzzy Network for Rolling Element Bearings

open access: yesIEEE Access, 2018
To solve the problem in which the auxiliary white-noise parameters need to be artificially selected in a noise-assisted multivariate empirical mode decomposition (NA-MEMD) and considering the fact that obtaining a large number of typical fault samples in
Sheng Liu, Yue Sun, Lanyong Zhang
doaj   +1 more source

A New Class of PSMA-617-Based Hybrid Molecules for Preoperative Imaging and Intraoperative Fluorescence Navigation of Prostate Cancer

open access: yesPharmaceuticals, 2022
The development of PSMA-targeting low-molecular-weight hybrid molecules aims at advancing preoperative imaging and accurate intraoperative fluorescence guidance for improved diagnosis and therapy of prostate cancer.
A. Eder   +10 more
semanticscholar   +1 more source

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