Results 21 to 30 of about 148,854 (297)

Kara Madde ve Kara Enerji

open access: yes, 2023
Uzun zamandır fiziğin temel kanunları üzerine çalışıyorum. Bu süre zarfında, yerçekiminin Newtoncu gibi çalışmadığını fark ettim ve bu durum bizi Kara Madde olarak yanıltmaktadır. Mesafe ve yerçekimi kuvveti ilişkisi mesafeye göre değişir. Çekim denklemi, mevcut en uzak ya da yakın mesafe için $1/r$, $1/r^2$ ya da $1/r^4$ gibi bazı değerlerle değişir ...
openaire   +4 more sources

Characteristic Analysis of Concrete for Radiation Shielding Evaluation of Gamma Irradiation Facilities

open access: yesEPJ Web of Conferences, 2017
Physical and chemical properties of concrete sample was obtained using various methods such as density analysis, elemental analysis and WD-XRF analysis to get accurate characteristics of concrete collected in our construction site in Korea.
Han Ki-tek   +3 more
doaj   +1 more source

Reinforcing Particle Architectural Stability of Li‐Rich Cathode With Enhanced Anionic Redox Reaction Reversibility

open access: yesAngewandte Chemie, EarlyView.
In this work, we establish a direct correlation between internal compactness and particle architectural stability, identifying it as a key descriptor of cathode structural integrity. Simultaneously, the capacity contribution and compensation mechanism of ARR are resolved, revealing that the extent of irreversible capacity loss is governed by both the ...
Yizhen Huang   +24 more
wiley   +2 more sources

Meniscus‐Guided Soft‐Lithographic Assembly of Grid‐Type Molecular Martensite Films for Single‐Crystal‐Like Actuation

open access: yesAdvanced Functional Materials, EarlyView.
A meniscus‐guided microtransfer molding strategy enables scalable fabrication of grid‐type molecular martensite films with b‐axis‐correlated preferential texture. Sequential growth across microchannel intersections creates structurally continuous grids and robust thermoelastic actuation (∼11% strain, > 50 cycles, maximum force density: 7.1 × 109 N m−3).
Sooyeon Ra   +15 more
wiley   +1 more source

Facile, Scalable, and High‐Yield Synthesis of a Near‐Unity Quantum Yield Zero‐Dimensional Copper Halide Cs3Cu2Cl5 Scintillator for X‐Ray Imaging

open access: yesAdvanced Optical Materials, EarlyView.
A dioxolane‐mediated reaction synthesis provides a simple and scalable route to phase‐pure Cs3Cu2Cl5 scintillator powders with near‐complete conversion, near‐unity photoluminescence quantum yield, and long‐term stability. The resulting green‐emitting composite films exhibit strong radioluminescence, high light yield, and practical compatibility with ...
Young Seung Choi   +12 more
wiley   +1 more source

Laser Preset of MnOx Layer on High‐Entropy Alloy Surface for Ampere‐Level Ultra‐Stable OER Performance

open access: yesAdvanced Science, EarlyView.
3D printing enables a high entropy alloy‐derived, in situ formed MnOx overlayer that suppresses oxidation–reconstruction and mitigates anodic dissolution, while enhancing electrolyte wetting and bubble release to accelerate interfacial mass transport and OER kinetics.
Benzhi Wang   +8 more
wiley   +1 more source

Natural and anthropogenic rapid changes in the Kara-Bogaz Gol over the last two centuries reconstructed from palynological analyses and a comparison to instrumental records [PDF]

open access: yes, 2006
Palynological analyses (pollen and dinocysts) of a sediment core taken in the Kara-Bogaz Gol have been used to reconstruct rapid and catastrophic environmental changes over the last two centuries (chronology based on 210Pb).
Bulatov, SA   +3 more
core   +6 more sources

Real‐Time Ferroelectric Domain Wall Dynamics During Electric Poling and Depoling

open access: yesAdvanced Science, EarlyView.
Real‐time visualization of domain wall dynamics during alternating‐current poling, direct‐current poling, and electrical depoling in relaxor‐PT ferroelectric single crystals reveals distinct field‐dependent pathways and strong path dependence. Instant polarized light microscopy uncovers reversible domain wall nucleation, motion, and reconfiguration ...
Ziqi Wang   +12 more
wiley   +1 more source

FriiTriga, a triggered controller with an optical beam shutter using a hard disk drive voice-coil actuator

open access: yesHardwareX
We present in this article the complete setup to build a triggered controller with a mechanical optical shutter. The system is a low cost, Do-It-Yourself, and easy to implement setup with three functionalities: Manual mode, direct mode with TTL signal ...
Dam-Bé L. Douti   +2 more
doaj   +1 more source

Kara wieczna – czym jest?

open access: yesVerbum Vitae, 2019
Słowo wstępne redaktora naczelnego, ks. prof. dr. hab. Henryka Witczyka (KUL).
Henryk Witczyk
doaj   +1 more source

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