Results 91 to 100 of about 22,474 (244)

Trajectory design and transmission optimization for data freshness in UAVs‐assisted WPCNs

open access: yesIET Communications
To address the issues of energy supply and data freshness in the wireless powered communication network (WPCN), the long‐term average age of information (AoI) in an unmanned aerial vehicles (UAVs)‐assisted WPCN is investigated, where UAVs, fully charged ...
Xiaoying Liu   +3 more
doaj   +1 more source

Hovering Control of ROV Based on Event-Triggered Image Moments Nonlinear Model Predictive Control

open access: yesJournal of Marine Science and Engineering
Hovering control of remotely operated vehicles (ROVs) is a key fundamental capability for underwater operation tasks, and vision-based ROV hovering control has become a current research focus because of its significant advantages.
Ziyang Shen   +4 more
doaj   +1 more source

Hovering control of UAV based on autonomous mapping approach

open access: yes, 2010
The autonomous learning capability of UAV (unmanned aerial vehicle) has gained more and more attentions of researchers. As far as helicopter steering is concerned, instead of calculating dynamics of UAV in a relative short interval, pilots just take ...
Zhao XG(赵新刚)   +2 more
core  

A Two‐Step Procedure for Generating Domestic and Asymmetric Trade Costs When Data Are Scarce

open access: yesInternational Journal of Finance &Economics, EarlyView.
ABSTRACT The practice of domestic trade cost measurement faces several challenges related to data quality, methodology and theory; but the major issue is that of data scarcity. Due to these facts, both domestic and asymmetric trade costs have been ignored despite being a feature of modern trade models.
Arman Mazhikeyev
wiley   +1 more source

Fiscal Cyclicality and Debt Sustainability: Evidence From Over a Century of Data

open access: yesInternational Journal of Finance &Economics, EarlyView.
ABSTRACT Using a historical fiscal dataset for a group of 11 economies over the period 1880–2022, we examine debt sustainability and fiscal policy cyclicality and assess the factors influencing fiscal behaviour. We find that positive and statistically significant responses of primary balances to debt emerge in specific historical episodes and ...
Christos Chrysanthakopoulos   +2 more
wiley   +1 more source

Heating the Inflation Inequality in Greece

open access: yesInternational Journal of Finance &Economics, EarlyView.
ABSTRACT The aim of the current study is twofold. First, we assess the household inflation inequality in Greece not only across different income groups but also across other households' social and economic characteristics, such as occupational status and household composition, among others.
Stavros Degiannakis   +2 more
wiley   +1 more source

Measurement-Based Large-Scale Indoor Channel Modeling for Hovering UAV-to-Ground Wireless Links

open access: yesIEEE Access
Indoor autonomous drones rely on robust wireless connectivity to operate in GPS-denied environments; however, indoor radio-frequency (RF) propagation is strongly affected by multipath, blockage, and device instability.
Haythem Bany Salameh   +4 more
doaj   +1 more source

Chemopreventive Effect of Bitter Melon (Momordica charantia) Juice on Pancreatic Carcinogenesis in LSL‐KrasG12D/+; p48Cre/+ Mice

open access: yesMolecular Carcinogenesis, EarlyView.
ABSTRACT Herein, using the LSL‐KrasG12D/+; p48Cre/+ transgenic mouse model [that recapitulates the full spectrum of human disease, progressing from early pancreatic intraepithelial neoplasia lesions to invasive pancreatic ductal adenocarcinoma (PDAC)], we determined the chemopreventive effect of long‐term (chronic) administration of Bitter Melon Juice (
Lakshmi Sai Pratyusha Bugata   +7 more
wiley   +1 more source

Hovering helicopter

open access: yes, 1974
View of a hovering helicopter with a forested hillside beyond.

core  

Electromagnetic Hovering Planar Actuator

open access: yes, 2011
Of all manipulations to products in industry, planar motion is the most common. Planar actuators with low maintenance and operation costs and high flexibility are desired.
Coene, Steven   +4 more
core  

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