Results 111 to 120 of about 2,570 (205)

Simple model of bouncing ball dynamics. Displacement of the limiter assumed as a cubic function of time

, 2012
Nonlinear dynamics of a bouncing ball moving vertically in a gravitational field and colliding with a moving limiter is considered and the Poincare map, describing evolution from an impact to the next impact, is described.
A. Okniński, A. Okniński, A.B. Nordmark, A.C.J. Luo, A.C.J. Luo, A.C.J. Luo, A.F. Filippov, Andrzej Okniński, Bogusław Radziszewski, C. Knudsen, J. Awrejcewicz, J. Awrejcewicz, M. Bernardo di, M. Wiercigroch, S. Giusepponi, S. Giusepponi, S. Lenci, W.J. Stronge   +17 more
core   +1 more source

Bow-and-arrow, technology of the first modern humans in Europe 54,000 years ago at Mandrin, France. [PDF]

Sci Adv, 2023
Metz L, Lewis JE, Slimak L.
europepmc   +1 more source

Environmental sound classification using temporal-frequency attention based convolutional neural network. [PDF]

Sci Rep, 2021
Mu W, Yin B, Huang X, Xu J, Du Z.
europepmc   +1 more source

Source Apportionment of Heavy Metals Based on Multiple Approaches for a Proposed Subway Line in the Southeast Industrial District of Beijing, China. [PDF]

Int J Environ Res Public Health, 2022
Jia X, Xia T, Liang J, Li Y, Zhu X, Zhang D, Wang J.   +6 more
europepmc   +1 more source

Method and apparatus for subsurface exploration [PDF]

, 2002
A subsurface explorer (SSX) for exploring beneath the terrestrial surface of planetary bodies such as the Earth, Mars, or comets. This exploration activity utilizes appropriate sensors and instrument to evaluate the composition, structure, mineralogy and
Wilcox, Brian
core   +1 more source

Unoccupied Aircraft Systems Sampling for Earth and Mars

The Planetary Science Journal
Unoccupied aircraft systems (UAS) technology on Earth has become increasingly prevalent and accessible, and for extraterrestrial applications, the Ingenuity helicopter has proven the viability of flight on Mars.
Colin Chen, Christopher W. Hamilton, Christian Sipe, Kathryn Bywaters, Justin Lawrence, Paul Creekmore, Nicklaus Traeden, Kris Zacny   +7 more
doaj   +1 more source

An In Vitro Evaluation of Primary Stability Values for Two Differently Designed Implants to Suit Immediate Loading in Very Soft Bone. [PDF]

Dent J (Basel), 2021
Krischik D, Tokgöz SE, van Orten A, Friedmann A, Bilhan H.   +4 more
europepmc   +1 more source

Mission Architecture Using the SpaceX Starship Vehicle to Enable a Sustained Human Presence on Mars. [PDF]

New Space, 2022
Heldmann JL, Marinova MM, Lim DSS, Wilson D, Carrato P, Kennedy K, Esbeck A, Colaprete TA, Elphic RC, Captain J, Zacny K, Stolov L, Mellerowicz B, Palmowski J, Bramson AM, Putzig N, Morgan G, Sizemore H, Coyan J.   +18 more
europepmc   +1 more source

Development of the Third Generation of the Dual-Reciprocating Drill. [PDF]

Biomimetics (Basel), 2020
Pitcher C, Alkalla M, Pang X, Gao Y.
europepmc   +1 more source

Non-Mulberry Silk Fiber-Based Composite Scaffolds Containing Millichannels for Auricular Cartilage Regeneration. [PDF]

ACS Omega, 2022
Yao X, Yang Y, Zhou Z.
europepmc   +1 more source