Results 31 to 40 of about 213,748 (288)

The tidal stripping of satellites

open access: yes, 2005
We present an improved analytic calculation for the tidal radius of satellites and test our results against N-body simulations. The tidal radius in general depends upon four factors: the potential of the host galaxy, the potential of the satellite, the
Evans, N. W.   +4 more
core   +1 more source

Bispectrum Supersample Covariance

open access: yes, 2018
Modes with wavelengths larger than the survey window can have significant impact on the covariance within the survey window. The supersample covariance has been recognized as an important source of covariance for the power spectrum on small scales, and ...
Chan, Kwan Chuen   +2 more
core   +1 more source

Disturbance rejection controller design based on nonlinear with fuzzy approximation technique for a tidal turbine system

open access: yesJournal of King Saud University: Engineering Sciences, 2023
In this work, a novel disturbance rejection controller based on a nonlinear fractional order proportional integral derivative with fuzzy (NLFOPIDF) approximation and an adaptive law technique for a 160 kW two horizontal axis parts tidal turbine model is ...
Mustafa Wassef Hasan
doaj   +1 more source

The origin of the Milky Way globular clusters [PDF]

open access: yes, 2016
We present a cosmological zoom-in simulation of a Milky Way-like galaxy used to explore the formation and evolution of star clusters. We investigate in particular the origin of the bimodality observed in the colour and metallicity of globular clusters ...
Agertz, Oscar   +2 more
core   +2 more sources

Tidal energy generation using the double-emptying system scheme [PDF]

open access: yes, 2012
This paper presents the electrical power generation by using the tidal lagoon system. In general, using tidal concept, water will flow into the dam in one direction, and then water will be forced to be released back into the sea via the low-head one-way ...
Abdul Manaf, Muhammad Safwan   +3 more
core  

Silicified Wood‐Inspired, High‐Strength Fire‐Resistant Chitin‐Based Aerogels for Sustainable High‐Temperature Thermal Insulation

open access: yesAdvanced Functional Materials, EarlyView.
Inspired by natural silicified wood, a biomimetic mineralized chitin‐derived aerogel is constructed. It can withstand 81 000 times its own weight, and its backside temperature is 130.4°C after exposure to ∼1300°C butane flame for 600 s, exhibiting high‐strength, fire‐resistance, and super thermal‐insulation properties.
Kai Xu   +11 more
wiley   +1 more source

Analysis of Dynamic Behaviour and Power Generation of a Wind-tidal System for Marine Environment [PDF]

open access: yes, 2012
This work presents the analysis of dynamic behaviour and power generation of a wind-tidal hybrid system. Mathematical models and system design approach were used to investigate the feasibility, reliability and economic impact of the system.
Ogbemhe, J.A.   +2 more
core  

Smart Face Masks as Wearable Respiratory Sensors: A Review of Sensor Technologies, Materials, and Future Directions

open access: yesAdvanced Healthcare Materials, EarlyView.
This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi   +7 more
wiley   +1 more source

Shocks Power Tidal Disruption Events

open access: yesThe Astrophysical Journal, 2023
Accretion of debris seems to be the natural mechanism to power the radiation emitted during a tidal disruption event (TDE), in which a supermassive black hole tears apart a star.
Taeho Ryu   +4 more
doaj   +1 more source

Discovery of tidal tails around the distant globular cluster Palomar 14 [PDF]

open access: yes, 2010
We report the detection of a pair of degree-long tidal tails associated with the globular cluster Palomar 14, using images obtained at the CFHT. We reveal a power-law departure from a King profile at large distances to the cluster center. The density map
A. Sollima   +44 more
core   +5 more sources

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