Results 31 to 40 of about 1,700,236 (333)

Microwave workshop for windows [PDF]

, 1995
This paper describes Microwave Workshop for Windows, a suite of three programs which have been designed in the Division of Physics in the University of Portsmouth to perform the dual function of teaching aid and providing a circuit‐design utility in the ...
White, Colin
core   +2 more sources

Quantum Communication Technology

, 2010
Quantum communication is built on a set of disruptive concepts and technologies. It is driven by fascinating physics and by promising applications. It requires a new mix of competencies, from telecom engineering to theoretical physics, from theoretical ...
Gisin, Nicolas, Thew, Rob
core   +3 more sources

Research on broadband vibration control mechanism of an acoustic black hole beam with an adjustable stiffness internal boundary

iScience
Summary: The acoustic black hole (ABH), as a vibration control technology, provides a way for vibration and noise control by realizing the aggregation and dissipation of vibration energy through the design of special geometric structures.
Tao Wang, Yuhao Zhao, Xiaoyang Liu, Mingfei Chen   +3 more
doaj   +1 more source

Increasing the robustness and crack resistivity of high-performance carbon fiber composites for space applications

iScience, 2021
Summary: The endeavors to develop manufacturing methods that can enhance polymer and composite structures in spacecraft have led to much research and innovation over many decades. However, the thermal stability, intrinsic material stress, and anisotropic
Michal Delkowski, Christopher T.G. Smith, José V. Anguita, S. Ravi P. Silva   +3 more
doaj   +1 more source

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

Speciation Through the Lens of Population Dynamics: A Theoretical Primer on How Small and Large Populations Diverge

Population Ecology, EarlyView.
Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi, Hidaka Kubo, Tokuya Ogawa, Hayate Omura   +3 more
wiley   +1 more source

A self-powered and self-sensing knee negative energy harvester

iScience
Summary: Wearable devices realize health monitoring, information transmission, etc. In this study, the human-friendliness, adaptability, reliability, and economy (HARE) principle for designing human energy harvesters is first proposed and then a ...
Daning Hao, Yingjie Li, Jiaoyi Wu, Lei Zeng, Zutao Zhang, Hongyu Chen, Weizhen Liu   +6 more
doaj   +1 more source

Investigate the dynamic nature of soliton solutions and bifurcation analysis to a new generalized two-dimensional nonlinear wave equation with its stability

Results in Physics, 2023
In this current research, we investigate a new generalized two-dimensional nonlinear wave equation of engineering physics using two versatile approaches.
Asghar Ali, Jamshad Ahmad, Sara Javed, Shalan Alkarni, Nehad Ali Shah   +4 more
doaj   +1 more source

A stepwise emergence of evolution in the RNA world

FEBS Letters, EarlyView.
How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley   +1 more source

Engineering physics of superconducting hot-electron bolometer mixers

, 2017
Superconducting hot-electron bolometers are presently the best performing mixing devices for the frequency range beyond 1.2 THz, where good quality superconductor-insulator-superconductor (SIS) devices do not exist.
Klapwijk, T. M., Semenov, A. V.
core   +2 more sources