Results 41 to 50 of about 13,707 (269)

Short selling ETFs and market performance

Journal of Financial Research, EarlyView.
Abstract We examine short selling activity in leveraged Exchange‐Traded Funds (ETFs) and its impact on underlying index performance. Using a novel measure of ETF short exposure, which includes long positions in inverse leveraged ETFs, we document that high short exposure is associated with positive performance in the subsequent period.
Doina C. Chichernea, Alex Petkevich, Kainan Wang   +2 more
wiley   +1 more source

An adaptive UKF algorithm and its application in mobile robot control

, 2006
In order to improve the performance of the UKF a novel adaptive filter method is proposed. The error between the covariance matrixes of innovation measurements and their corresponding estimations/predictions is utilized as the cost function. Based on the
Song Q(宋崎), Qi Song, Qi JT(齐俊桐), Jianda Han, Juntong Qi, Han JD(韩建达)   +5 more
core   +1 more source

Patient Safety Competencies, Clinical Learning Environment and Unfinished Care From the Perspective of Nursing Students: A Multinational Study

Journal of Clinical Nursing, EarlyView.
ABSTRACT Aim To assess perceived patient safety competencies among nursing students and to examine their associations with their perceptions regarding clinical learning environment and unfinished nursing care. Design An international comparative cross‐sectional study.
Dominika Kohanová, Elena Gurková, Alvisa Palese, Daniela Bartoníčková, Lenka Mazalová, Aysel Özsaban, Aysun Bayram, Seher Basaran‐Acil, Öznur Ispir Demir, Stefania Chiappinotto   +9 more
wiley   +1 more source

Rotorcraft UAV actuator failure estimation with KF-based adaptive UKF algorithm

, 2008
A new adaptive Unscented Kalman Filter (UKF) algorithm for actuator failure estimation is proposed. The novel filter method with adaptability to statistical characteristic of noise is presented to improve the estimation accuracy of traditional UKE The ...
Qi JT(齐俊桐), Jianda Han, Wu ZW(吴镇炜), Zhenwei Wu, Juntong Qi, Han JD(韩建达)   +5 more
core   +1 more source

Contemporary critical reception of the novel Agáty /Black Locusts/ (in Slovak press) [PDF]

Slovenska Literatura, 2012
Ladislav Ballek´s novel Agáty (Black Locusts) was published in 1981. It was the time of normalization - political totalitarianism, which made every effort to regulate art production and declared socialist realism to be the only right creative method ...
Igor Hochel
doaj  

Resilience and Recovery in the Informal Economy: Social Networks, Social Protection, and Adaptive Strategies Among Post‐COVID Workers in Bangladesh

Public Health Challenges, Volume 5, Issue 2, June 2026.
Post‐COVID informal workers in Bangladesh experienced about 50% income loss, driving financial insecurity with public‐health consequences. Resilience was strengthened by income diversification and strong social networks, whereas only about 10% accessed formal social protection—highlighting the need for inclusive, community‐linked safety nets to support
Md. Abdullah Al Mamun, Khandakar Farid Uddin, Md. Shawan Uddin, A. N. M. Jahangir Kabir, Md. Nazirul Islam Sarker   +4 more
wiley   +1 more source

The Image of the Turk in the Works of the Slovaks and the Macedonians [PDF]

Slovenska Literatura, 2015
The goal of the article is to outline the development of presenting (anti-)Turkish themes in Macedonian and early Slovak literatures (especially in the 17th century).
Martina Zajíčková
doaj  

Morphology of the Motif of Figural Transformation in the Subject of Stories about a Sister Seeking Her Brothers Turned into Animals [PDF]

Slovenska Literatura, 2020
The subject of the paper is transcultural comparison of Slovak and foreign-language stories based on the fairy-tale subject about a sister who seeks her brothers turned into animals.
Nikola Danišová
doaj  

Comparative Analysis of the Performances of a Nonlinear Observer and Nonlinear Kalman Filters in the Presence of Non‐Gaussian Disturbances

International Journal of Robust and Nonlinear Control, Volume 36, Issue 7, Page 3896-3913, 10 May 2026.
ABSTRACT This paper focuses on state estimation for a fairly general class of systems, involving nonlinear functions and disturbances in both the process dynamics and output equations. A nonlinear observer that satisfies a H∞$$ {\boldsymbol{H}}_{\boldsymbol{\infty}} $$ disturbance attenuation constraint in addition to providing asymptotic stability in ...
Hamidreza Movahedi, Ali Zemouche, Rajesh Rajamani   +2 more
wiley   +1 more source

Adaptive Q‐Wavelet Transform and Kalman Filtering for Power Quality Disturbance Prediction and Carbon Emission Impact Analysis in Smart Grids

Engineering Reports, Volume 8, Issue 5, May 2026.
Maintaining power quality (PQ) and minimizing carbon emissions are crucial for sustainable smart grids, especially with increasing renewable energy integration. This paper proposes a novel method combining Adaptive Q‐Wavelet Transform (AQWT) and Kalman Filtering (KF) to predict PQ disturbances and faults while analyzing their impact on carbon emissions.
Abhishek Raj, Anvesha Nandi, Sunil Kumar Sawant, Anil Kumar Swain, Ashlok Prasad Yadav, Ajaya kumar parida, Mohamed Metwally Mahmoud, Vojtech Blazek, Daniel Eutyche Mbadjoun Wapet, Shazly Nasser Fahmy   +9 more
wiley   +1 more source