Results 21 to 30 of about 3,354,348 (302)

Long-term variation in the Sun's activity caused by magnetic Rossby waves in the tachocline [PDF]

, 2015
Long-term records of sunspot number and concentrations of cosmogenic radionuclides (10Be and 14C) on the Earth reveal the variation of the Sun's magnetic activity over hundreds and thousands of years.
Ballester, J. L., Carbonell, M., Gachechiladze, T., Hanslmeier, A., Oliver, R., Usoskin, I. G., Zaqarashvili, T. V.   +6 more
core   +1 more source

Stellar Population Gradients in Bulges along the Hubble Sequence: I. The Data [PDF]

, 2007
This is the first paper presenting our long-term project aimed at studying the nature of bulges through the analysis of their stellar population gradients.
Andredakis, Arimoto, Balcells, Balcells, Bekki, Bender, Bender, Bottema, Caldwell, Cardiel, Cardiel, Carlberg, Carollo, Courteau, de Jong, Denicoló, Falcón-Barroso, Falcón-Barroso, Fisher, Friedli, Friedli, Golev, Goudfrooij, Goudfrooij, Hamuy, Idiart, J. Gorgas, Jablonka, Jablonka, Kauffmann, Kormendy, Kuntschner, Lütticke, Martin, Massey, McArthur, Mehlert, Moorthy, Norman, Oke, P. Goudfrooij, P. Jablonka, Paturel, Peletier, Pfenniger, Prugniel, Sargent, Sánchez-Blázquez, Sánchez-Blázquez, Trager, Trager, Vila-Costas, Worthey, Worthey, Zaritsky   +54 more
core   +6 more sources

Experimental Researches on Long-Term Strength of Granite Gneiss

Advances in Materials Science and Engineering, 2015
It is important to confirm the long-term strength of rock materials for the purpose of evaluating the long-term stability of rock engineering. In this study, a series of triaxial creep tests were conducted on granite gneiss under different pore pressures.
Lin Liu, Weiya Xu
doaj   +1 more source

Prediction of concrete compressive strength due to long term sulfate attack using neural network

Alexandria Engineering Journal, 2014
This work was divided into two phases. Phase one included the validation of neural network to predict mortar and concrete properties due to sulfate attack. These properties were expansion, weight loss, and compressive strength loss.
Ahmed M. Diab, Hafez E. Elyamany, Abd Elmoaty M. Abd Elmoaty, Ali H. Shalan   +3 more
doaj   +1 more source

Study on Shear Creep Characteristics and Creep Model of Soil-Rock Mixture Considering the Influence of Water Content

Frontiers in Physics, 2022
Water content has a significant effect on the creep properties of soil-rock mixtures (SRM). Multi-loading shear creep tests are carried out on SRM samples with different water contents.
Zihua Jiang, Huanling Wang
doaj   +1 more source

Assessment of Residual Service Life of Cast Bodies of Control Valves of 220 MW Power Units [PDF]

Journal of Mechanical Engineering, 2020
In the regulatory documents of the Ministry of Energy and Coal Industry of Ukraine, the beyond-design operating life of the high-energy equipment of 220 MW power units is limited to the operating life of 220 thousand hours and 800 start-ups. To date, the
Olha Yu. Chernousenko, Dmytro V. Ryndiuk, Vitalii A. Peshko   +2 more
doaj   +1 more source

Cyclic and Long-term Variation of Sunspot Magnetic Fields

, 2013
Measurements from the Mount Wilson Observatory (MWO) are used to study the long-term variations of sunspot field strengths from 1920 to 1958. Following a modified approach similar to that in Pevtsov et al.
A.A. Pevtsov, A.V. Mordvinov, F.T. Watson, J. Houtgast, M.J. Penn, M.J. Penn, R. Rezaei, T.S. Ringnes, W. Livingston, W. Livingston   +9 more
core   +1 more source

Modeling Maintenance of Long-Term Potentiation in Clustered Synapses, Long-Term Memory Without Bistability [PDF]

, 2015
Memories are stored, at least partly, as patterns of strong synapses. Given molecular turnover, how can synapses maintain strong for the years that memories can persist?
Smolen, Paul
core   +4 more sources

Optimal dose and type of exercise improve walking velocity in adults with Parkinson’s disease: a systematic review and Bayesian network meta-analysis

Scientific Reports
To examine the dose–response relationship between specific types of exercise for improving walking velocity in Parkinson’s disease (PD). This systematic review and network meta-analysis included searches of PubMed, Medline, Embase, PsycINFO, Cochrane ...
Shaoqing Xie, Yuan Yuan, Junyu Wang, Ying Bai, Tao Wang, Bopeng Qiu, Yong Yang, Shu-Cheng Lin   +7 more
doaj   +1 more source

Long-term strength properties of HVFA concretes [PDF]

IOP Conference Series: Materials Science and Engineering, 2015
Fly ash from coal burning is used as active addition for concrete in Middle-Europe region for several decades. The intensity of its utilization increases still. In the role of supplementary cement addition it serves as binder, whereby it helps to reduce final price of concrete as well as improves both the rheological properties of fresh concrete and ...
M Špak, R Bašková
openaire   +1 more source