Results 41 to 50 of about 19,810 (194)

Kinematics and Dynamics of a Tensegrity‐Based Water Wave Energy Harvester

open access: yesJournal of Robotics, Volume 2016, Issue 1, 2016., 2016
A tensegrity‐based water wave energy harvester is proposed. The direct and inverse kinematic problems are investigated by using a geometric method. Afterwards, the singularities and workspaces are discussed. Then, the Lagrangian method was used to develop the dynamic model considering the interaction between the harvester and water waves.
Min Lin   +3 more
wiley   +1 more source

Kosowo - koniec Europy? [PDF]

open access: yes, 2018
Russian Foreign Minister, Sergei Lavrov, once said that Kosovo’s independence could be the beginning of the end for Europe, and that official recognition of its sovereignty would threaten global security.
Zobeniak, Marta
core   +2 more sources

Enhancing Weak‐Signal Carrier Phase Tracking in GNSS Receivers

open access: yesInternational Journal of Navigation and Observation, Volume 2015, Issue 1, 2015., 2015
Examining the performance of the GNSS PLL, this paper presents novel results describing the statistical properties of four popular phase estimators under both strong‐ and weak‐signal conditions when subject to thermal noise, deterministic dynamics, and typical pedestrian motion.
James T. Curran, Olivier Julien
wiley   +1 more source

Cele i wyzwania europejskiego zielonego ładu dla sektora transportu morskiego

open access: yesGdańskie Studia Prawnicze, 2023
Unijna polityka klimatyczna, odwołująca się m.in. do postanowień tzw. porozumień paryskich ONZ, wymaga zmian prawnych i technologicznych w wielu sektorach, w tym w transporcie.
Anna Dobaczewska
doaj   +1 more source

Natural Frequencies and Modal Damping Ratios Identification of Civil Structures from Ambient Vibration Data

open access: yesShock and Vibration, Volume 13, Issue 4-5, Page 429-444, 2006., 2006
Damping is a mechanism that dissipates vibration energy in dynamic systems and plays a key role in dynamic response prediction, vibration control as well as in structural health monitoring during service. In this paper a time domain and a time‐scale domain approaches are used for damping estimation of engineering structures, using ambient response data
Minh-Nghi Ta   +2 more
wiley   +1 more source

Encouraging politicians to act on climate: A field experiment with local officials in six countries

open access: yesAmerican Journal of Political Science, Volume 69, Issue 1, Page 148-163, January 2025.
Abstract Local governments play an important role in addressing the climate crisis. However, despite public support for climate action, local policy responses have been limited. We argue that (1) biased beliefs about voter preferences, (2) the time horizon for credit claiming, and (3) source credibility are barriers for legislators to learn and adopt ...
Miguel M. Pereira   +3 more
wiley   +1 more source

Solution of Volterra‐type integro‐differential equations with a generalized Lauricella confluent hypergeometric function in the kernels

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2005, Issue 8, Page 1155-1170, 2005., 2005
The object of this paper is to solve a fractional integro‐differential equation involving a generalized Lauricella confluent hypergeometric function in several complex variables and the free term contains a continuous function f(τ). The method is based on certain properties of fractional calculus and the classical Laplace transform.
R. K. Saxena, S. L. Kalla
wiley   +1 more source

Zrównoważony rozwój i kształcenie ustawiczne w szwedzkiej glottodydaktyce

open access: yesPostscriptum Polonistyczne, 2023
Artykuł dotyczy zrównoważonego rozwoju. Po wstępnym zarysie historycznym i przedstawieniu założeń organizacji międzynarodowych, takich jak UNESCO czy ONZ, w zakresie pracy na rzecz ochrony środowiska autorka podaje definicję zrównoważonego rozwoju oraz ...
Magdalena Slyk
doaj   +1 more source

A mixed boundary value problem for Laplace′s equation involving a nearly circular disk

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 17, Issue 1, Page 125-128, 1994., 1993
The electrostatic problem of a nearly circular disk charged to a unit potential is considered for its solution as it serves as the most important and symbolic mixed boundary value problem for Laplace′s equation with the aid of which many complicated mixed boundary value problems arising in elasticity and fluid dynamics can be handled for solution.
A. Chakrabarti, D. P. Manna
wiley   +1 more source

The comfort zone: Reflection on a taken-for-granted model [PDF]

open access: yes, 2008
Reference to the comfort zone model is widespread within outdoor adventure education. It is based on the belief that when placed in a stressful situation people will respond by overcoming their hesitancy and grow.
Brown, Mike
core   +1 more source

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