Results 11 to 20 of about 458,086 (315)

Causality Relationship Between Economic, Financial, Political Risk and Growth: The Case of Turkey

open access: yesİktisat Politikası Araştırmaları Dergisi, 2022
This study aims to examine the causality relationship between Turkey’s economic, financial and political risk ratios and growth. Toda-Yamamoto causality, Bootstrap Toda-Yamamoto causality, and time-varying symmetric and asymmetric causality tests were ...
Esra Soyu Yıldırım   +2 more
doaj   +1 more source

Development of V-Shaped Beam on the Shock Resistance and Driving Frequency of Micro Quartz Tuning Forks Resonant Gyroscope

open access: yesMicromachines, 2020
The application of gyroscopes in harsh environments has always been a hot topic. As a high-quality material for manufacturing gyroscopes, quartz crystals need to be designed and optimized to meet the normal operation of gyroscopes in harsh environments ...
Bing Bai, Cun Li, Yulong Zhao
doaj   +1 more source

Numerical Analysis of Unsteady Characteristics of the Second Throat of a Transonic Wind Tunnel

open access: yesAerospace, 2023
The unsteady characteristics of the second throat of a transonic wind tunnel have an important influence on the design and test of the wind tunnel. Therefore, the forced oscillation characteristics were studied by a numerical simulation method.
Chenghua Cong, Honggang Qin, Xingyou Yi
doaj   +1 more source

Two-Dimensional Numerical Study of the Transient Flow ‎Conditions in Complete Shock Tunnel‎ [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2021
In the current research, an axisymmetric model is developed to study high-speed unsteady flow in the test section of a 7 meter-long shock tunnel. The computational calculations of the shock tunnel are conducted using the Fluent CFD solver.
A.M. Mohsen   +4 more
doaj   +1 more source

Evolution of heat transfer at the stagnation point during the detached bow shock establishment

open access: yes, 2021
The diffraction of a shock wave over a stationary body is a problem of interest associated with the starting of shock tubes and expansion tubes which are well suited to studies of hypersonic flows.
李进平   +4 more
core   +2 more sources

The effect of specimen thickness on the shock propagation along the in-fibre direction of an aerospace-grade CFRP laminate [PDF]

open access: yes, 2009
In-fibre measurements of the Hugoniot have been carried out on a carbon fibre-reinforced polymer composite. For this material, we have shown at high shock stresses, a two component wave was formed consisting of a fast moving ramped portion and a slower ...
Cooper, G.   +2 more
core   +1 more source

Thermal shock resistance of industrial foam filters-a comparative study

open access: yesOpen Ceramics, 2023
For ceramic foams, there is no thermal shock resistance testing standard available at the moment. This work aims to investigate the influence of the different test conditions.
Celaida Gayle Gumban   +6 more
doaj   +1 more source

The structure of shock waves as a test of Brenner's modifications to the Navier-Stokes equations [PDF]

open access: yes, 2007
Brenner (Physica A, vol. 349, 2005a, b, pp. 11, 60) has recently proposed modifications to the Navier-Stokes equations that are based on theoretical arguments but supported only by experiments having a fairly limited range.
Reese, Jason M.   +2 more
core   +1 more source

Study on a Nonlinear Dynamic Model and Its Parameters Determination Method for Half-Sine Programmer

open access: yesXibei Gongye Daxue Xuebao, 2019
A nonlinear dynamic model for describing shock response of half-sine programmer in shock test is constructed, in which many important factors in half-sine programmer such as size, hard nonlinearity, damping and initial impact velocity are considered ...

doaj   +1 more source

Shock-avoiding slicing conditions: Tests and calibrations

open access: yesPhysical Review D, 2022
While the 1+log slicing condition has been extremely successful in numerous numerical relativity simulations, it is also known to develop "gauge-shocks" in some examples. Alternative "shock-avoiding" slicing conditions suggested by Alcubierre prevent these pathologies in those examples, but have not yet been explored and tested very broadly.
Thomas W. Baumgarte, David Hilditch
openaire   +2 more sources

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