Results 11 to 20 of about 16,186 (314)

Varroa destructor infestation impairs the improvement of landing performance in foraging honeybees

open access: yesRoyal Society Open Science, 2020
The parasitic mite Varroa destructor is an important contributor to the high losses of western honeybees. Forager bees from Varroa-infested colonies show reduced homing and flight capacity; it is not known whether flight manoeuvrability and related ...
Florian T. Muijres   +5 more
doaj   +1 more source

Enhancement of Technical and Economic Indicators of Power-Generating Units of Thermal Power Plants by Eliminating Flue Gas Recirculation

open access: yesEnergy Engineering and Control Systems, 2021
Boiler units at Ukrainian thermal power plants need to be modernized or replaced in the short run, as this is important for the national energy security.
Taras Kravets   +2 more
doaj   +1 more source

Submarine Manoeuvrability Design: Traditional Cross-Plane vs. x-Plane Configurations in Intact and Degraded Conditions

open access: yesJournal of Marine Science and Engineering, 2022
Submarines’ manoeuvrability both in intact and degraded operating conditions is the main design concern starting at the very early stages of design. This increased complexity of the design process compared to a surface vehicle can only be handled by ...
Benedetto Piaggio   +4 more
doaj   +1 more source

Implementing an Adaptive Thrust Distribution Algorithm on the Robust Control System for Serial Split-Hull Underwater Vehicles

open access: yesIEEE Access, 2022
This paper discusses designing and implementing an adaptive thrust distribution algorithm on the already robust control system for serial split-hull underwater vehicles to maximise operational efficiency.
Vishakh S. Kumar, Prabhu Rajagopal
doaj   +1 more source

Design of a Disc-Shaped Autonomous Underwater Helicopter with Stable Fins

open access: yesJournal of Marine Science and Engineering, 2022
The autonomous underwater helicopter, shortly referred to as AUH, is a newly developed underwater platform with a unique disc shape. An autonomous underwater helicopter with a suboptimal disc shape is presented in this paper.
Peizhou Du   +6 more
doaj   +1 more source

The effect of PID control scheme on the course-keeping of ship in oblique stern waves

open access: yesBrodogradnja, 2023
Sailing in oblique stern waves causes a ship to make sharp turns and uncontrollable course deviation, which is accompanied by a large heel and sometimes leads to capsizing.
Yunbo Li, Zongyu Tang, Jiaye Gong
doaj   +1 more source

A STUDY ON THE SENSITIVITY ANALYSIS OF THE HYDRODYNAMIC DERIVATIVES ON THE MANEUVERABILITY OF KVLCC2 IN SHALLOW WATER

open access: yesBrodogradnja, 2017
To assess the manoeuvrability of ships in shallow water at the early design stage, reliable simulation models which present shallow water effect are required.
Sang-Hyun Kim   +3 more
doaj   +1 more source

Joint Tracking of Manoeuvring Targets and Classification of Their Manoeuvrability [PDF]

open access: yesEURASIP Journal on Advances in Signal Processing, 2004
A mixed two-dimensional diffusion process with a varying local dispersion matrix is considered. This matrix is proposed to be a semi-Markov process with two states. The mixed process is being observed at time instants constituting a regular lattice.
openaire   +2 more sources

Stability and Manoeuvrability Simulation of a Semi-Autonomous Submarine Free-Running Model SUBOFF with an Autopilot System

open access: yesApplied Sciences, 2021
On the basis of a full-appendage DARPA SUBOFF model (DTRC model 5470), a scale (λ = 0.535) semi-autonomous submarine free-running model (SFRM) was designed for testing its manoeuvrability and stability in the constrained water.
Yu-Hsien Lin, Yu-Ting Lin, Yen-Jun Chiu
doaj   +1 more source

Queckenstedt's manoeuvre [PDF]

open access: yesJournal of Neurology, Neurosurgery & Psychiatry, 2006
This paper describes the beginnings of the measurement of CSF pressure and its physiological fluctuations by Queckenstedt that culminated in his clinical test for spinal canal obstruction. In 1891, Walter Essex Wynter, physician to the Middlesex Hospital, described the insertion of a Southey’s tube to withdraw infected cerebrospinal fluid (CSF) to ...
openaire   +2 more sources

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