Results 81 to 90 of about 3,801,916 (171)

Study on Effective Operating Distance of Downhole Vortex Tool

open access: yesShiyou jixie, 2020
The inferior application performance of downhole vortex tools on domestic gas wells are due to the unclear understanding of the application conditions of vortex tools, improper well selection, and the tool structure that needs to be further optimized. To
Zheng Huaan   +4 more
doaj  

Distance-based Camera Network Topology Inference for Person Re-identification

open access: yes, 2017
In this paper, we propose a novel distance-based camera network topology inference method for efficient person re-identification. To this end, we first calibrate each camera and estimate relative scales between cameras.
Cho, Yeong-Jun, Yoon, Kuk-Jin
core  

Probing the Dark Universe with Gravitational Waves

open access: yesUniverse
Gravitational waves (GWs) are expected to interact with dark energy and dark matter, affecting their propagation on cosmological scales. To model this interaction, we derive a gauge-invariant effective equation and action valid for all GW polarizations ...
Antonio Enea Romano
doaj   +1 more source

Effective Distance between Aortic Valve and Conduction System Is an Independent Predictor of Persistent Left Bundle Branch Block during Transcatheter Aortic Valve Implantation. [PDF]

open access: yesMedicina (Kaunas), 2021
Poels TT   +8 more
europepmc   +1 more source

Towards a more effective model for distance education

open access: yesE-learning and Education, 2014
What is the most effective model for academic distance education, given that drop-out numbers in traditional distance education institutions are too high and the demands from the various stakeholders are changing?
Rob Koper
doaj  

A Proposed Model for Sustainable Education in E-learning: the Effective Factors [PDF]

open access: yesInterdisciplinary Journal of Virtual Learning in Medical Sciences, 2014
With the growing use of information and communication technologies for education worldwide, e-learning has been widely regarded as an imperative tool for educational institutions and training centers all over the world.
Azar Kazemi, Mohtaram Nematollahi
doaj  

The Moderating Effects of Power Distance and Individualism/Collectivism on Empowering Leadership, Psychological Empowerment, and Self-Leadership in International Development Organizations

open access: yes, 2018
The importance of finding appropriate leadership styles to use in cross-cultural situations is paramount. Development organizations and multinational organizations both struggle to find forms of leadership that are effective in mobilizing the workforce ...
Rahschulte, Tim, Thomas, Debby
core  

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