Results 121 to 130 of about 941,372 (293)

Dynamical cross-correlations between RR and QT intervals in long-term electrocardiogram recordings

Scientific Reports
Understanding the dynamic relationship between RR and QT intervals is crucial for interpreting electrocardiograms (ECGs) and managing cardiac conditions.
Jimi Kokkonen, Jiyeong Kim-Poikkimäki, Teemu Pukkila, Esa Räsänen   +3 more
doaj   +1 more source

Computational models in physics teaching: a framework [PDF]

Investigações em Ensino de Ciências, 2012
The purpose of the present paper is to present a theoretical framework to promote and assist meaningful physics learning through computational models. Our proposal is based on the use of a tool, the AVM diagram, to design educational activities involving
Marco Antonio Moreira, Ives Solano Araujo, Eliane Angela Veit   +2 more
doaj  

Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions

Advanced Functional Materials, EarlyView.
DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng, Qian Yao, Yanan Sun, Hongyu Lv, Zhongchao Bai, Guoliang Zhang, Nana Wang, Jian Yang   +7 more
wiley   +1 more source

All‐in‐One Analog AI Hardware: On‐Chip Training and Inference with Conductive‐Metal‐Oxide/HfOx ReRAM Devices

Advanced Functional Materials, EarlyView.
An all‐in‐one analog AI accelerator is presented, enabling on‐chip training, weight retention, and long‐term inference acceleration. It leverages a BEOL‐integrated CMO/HfOx ReRAM array with low‐voltage operation (<1.5 V), multi‐bit capability over 32 states, low programming noise (10 nS), and near‐ideal weight transfer.
Donato Francesco Falcone, Victoria Clerico, Wooseok Choi, Tommaso Stecconi, Folkert Horst, Laura Bégon‐Lours, Matteo Galetta, Antonio La Porta, Nikhil Garg, Fabien Alibart, Bert Jan Offrein, Valeria Bragaglia   +11 more
wiley   +1 more source

Detecting sleep apnea using non-linear measures of heart rate variability

Respiratory Research
Background Sleep apnea is highly prevalent yet frequently underdiagnosed due to the cost and complexity of polysomnography. Heart rate variability (HRV) offers a scalable alternative for early screening, but conventional HRV metrics often overlook the ...
Topi Niemi, Matias Kanniainen, Marjaana Nurmo, Teemu Pukkila, Soroosh Solhjoo, Esa Räsänen   +5 more
doaj   +1 more source

First-Principles Study on the Multiphase Equation of State of Tin

Gaoya wuli xuebao
Metallic tin is a focal point in high-pressure physics research and a critical material of strategic importance in defense-related technologies. Due to the rich physical phases of tin, it is crucial to study the multiphase equation of state and phase ...
Kaile CHEN, Yuechao WANG, Yuanji XU, Yu LIU, Jiawei XIAN, Lifang WANG, Dan JIAN, Haifeng LIU, Haifeng SONG   +8 more
doaj   +1 more source

Printed Integrated Logic Circuits Based on Chitosan‐Gated Organic Transistors for Future Edible Systems

Advanced Functional Materials, EarlyView.
Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco, Valerio Francesco Annese, Valerio Galli, Ilaria Penna, Debora Russo, Marina Veronesi, Rita Scarpelli, Stefania Sabella, Mario Caironi   +8 more
wiley   +1 more source

Mechanism of magnetic phase transition in correlated magnetic metal: insight into itinerant ferromagnet Fe3−δ GeTe2

Communications Physics
Developing a comprehensive magnetic theory for correlated itinerant magnets poses challenges due to the difficulty in reconciling both local moments and itinerant electrons.
Yuanji Xu, Yue-Chao Wang, Xintao Jin, Haifeng Liu, Yu Liu, Haifeng Song, Fuyang Tian   +6 more
doaj   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Selective Benzene Capture by Metal‐Organic Frameworks

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) hold significant potential for capturing benzene from air emissions and hydrocarbon mixtures in liquid phases. This capability stems from their precisely engineered structures, versatile chemistries, and diverse binding interactions.
Zongsu Han, Ankit Mondal, Jiatong Huo, Yihao Yang, Hong‐Cai Zhou   +4 more
wiley   +1 more source