Results 51 to 60 of about 11,379 (251)

Informing the potential of mature temperate forests as natural climate solutions: Changed fine root biomass and morphology under elevated CO2

PLANTS, PEOPLE, PLANET, EarlyView.
The land carbon sink absorbs approximately 25% of anthropogenic CO2 emissions, with forests accounting for most. Managing forests as Natural Climate Solutions is therefore a societal imperative, requiring models of where and how long carbon resides within these ecosystems. We investigated the effects of elevated CO2 on fine roots, the primary source of
Grace Handy, Angeliki Kourmouli, Marie Arnaud, Carolina Mayoral, Richard J. Norby, Michaela K. Reay, Sami Ullah, Iain P. Hartley, R. Liz Hamilton, Robert Grzesik, Andy R. Smith, Elena Vanguelova, A. Rob MacKenzie, Adriane Esquivel‐Muelbert   +13 more
wiley   +1 more source

Structural Design and Motion Behavior Analysis of Composite Percussion Drilling Tool

Shiyou jixie, 2019
The high strength, poor drillability and strong breaking-resistance of deep complex hard formation rocks often result in stick-slip vibration and premature wear of the PDC bit.
Wang Wei, Liu Gonghui, Li Jun, Zha Chunqing, Huang Tao   +4 more
doaj  

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

Sound pressure levels in emission of percussion instruments during training sessions

Archives of Acoustics, 2000
Sounds of selected percussion instruments played in individual training sessions of students-percussion players were recorded and analysed. In statistical signal analysis the "impulsiveness" in terms of Lmax-Leq and in terms of kurtosis, as an ...
A. JAROSZEWSKI, P. ROGOWSKI, A. RAKOWSKI
doaj  

Evaluation of the noise exposure of symphonic orchestra musicians

Noise and Health, 2014
For musicians, the impact of noise exposure is not yet fully characterized. Some inconsistencies can be found in the methodology used to evaluate noise exposure.
Matilde Alexandra Rodrigues, Marisa Alexandra Freitas, Maria Paula Neves, Manuela Vieira Silva   +3 more
doaj   +1 more source

125 years of exploration and research at Gough's Cave (Somerset, UK) 125 ans d'exploration et de recherches à Gough's Cave (Somerset, Royaume‐Uni)

Journal of the Royal Anthropological Institute, EarlyView.
Our understanding of the recolonization of northwest Europe in the period leading up to the Lateglacial Interstadial relies heavily on discoveries from Gough's Cave (Somerset, UK). Gough's Cave is the richest Late Upper Palaeolithic site in the British Isles, yielding an exceptional array of human remains, stone and organic artefacts, and butchered ...
Silvia M. Bello, Mark D. Lewis, Simon A. Parfitt   +2 more
wiley   +1 more source

Drgania Uderzeniowe Prętów

Engineering Transactions, 1970
In this paper are examined free impact vibrations of rods. In calculation, perfect elastical percussion of the section of the rod with rigid stop is assumed. Next, by means of the adaptation of the solutions method the dependence of the frequency of free
C. Cempel
doaj  

Fishing Activity Affected Odontocete Cetacean Distribution in a Marine Protected Area in the East China Sea

Integrative Zoology, EarlyView.
Spatiotemporal distribution of odontocete cetaceans within China's Jiushan Archipelago National Nature Reserve was investigated. Fishing vessels significantly reduced both cetacean acoustic detections and feeding activity, whereas gillnets selectively suppressed cetacean feeding behavior without affecting overall cetacean detection rates.
Yifan Liu, Zitong Zhou, Peng Ding, Yu Pan, Zhi Yang, Haochi Wang, Fangqiao Wang, Tianshi Wei, Pengxiang Duan, Tomonari Akamatsu, Zhitao Wang   +10 more
wiley   +1 more source

Fast and intelligent detection of concrete cracks based on sound signals and convolutional neural network

Frontiers in Built Environment
IntroductionThe traditional crack detection method usually requires a tedious process of sensor installation and removal, which seriously affects the efficiency of concrete structure management and maintenance.MethodsFor this reason, this paper develops ...
Chunlei Ge, Yue Qin, Yue Qin, Kaizhong Xie, Zubiao Lu   +4 more
doaj   +1 more source

Assessment of Diabetic Autonomic Nervous Dysfunction with a Novel Percussion Entropy Approach

Complexity, 2019
This study investigated the validity of a novel parameter, percussion entropy index (PEI), for assessing baroreflex sensitivity. PEI was acquired through comparing the similarity in tendency of change between the amplitudes of successive digital volume ...
Hai-Cheng Wei, Ming-Xia Xiao, Na Ta, Hsien-Tsai Wu, Cheuk-Kwan Sun   +4 more
doaj   +1 more source