Results 61 to 70 of about 702 (169)

Structural Design of MOF‐Based and MOF‐Derived Composites for Oxygen Evolution Electrocatalysis: Materials Innovation for Energy and Environmental Sustainability

open access: yesENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 4, July 2026.
This review provides an overview of recent developments in metal organic framework (MOF)‐based and MOF‐derived composites for efficient oxygen evolution reaction. This review also emphasizes the structural design of electrocatalyst, active site optimization, and emerging prospects of their use in practical electrolyzer systems.
Bhagyashri B. Kamble   +7 more
wiley   +1 more source

Osteoarthritis: Epidemiology, Diagnosis, and Treatment

open access: yesMedComm, Volume 7, Issue 7, July 2026.
Osteoarthritis (OA) is a multifactorial degenerative joint disease and a leading cause of disability worldwide. This graphical abstract summarizes the epidemiology, diagnostic strategies, and therapeutic approaches of OA. OA development is driven by aging, metabolic dysregulation, and mechanical stress, leading to progressive joint degeneration ...
Qin Ru   +7 more
wiley   +1 more source

Semidigital PLL Design for Low-Cost Low-Power Clock Generation

open access: yesJournal of Electrical and Computer Engineering, 2011
This paper describes recent semidigital architectures of the phase-locked loop (PLL) systems for low-cost low-power clock generation. With the absence of the time-to-digital converter (TDC), the semi-digital PLL (SDPLL) enables low-power linear phase ...
Ni Xu, Woogeun Rhee, Zhihua Wang
doaj   +1 more source

Increasing a resolution of time to digital converter / Laikinio skaitmeninio keitiklio skiriamosios gebos didinimas

open access: yesMokslas: Lietuvos Ateitis, 2017
Time to digital converter (TDC) is one of the main blocks of all-digital frequency synthesizer (FS), where it is used as phase detector. The output of TDC is digital, therefore it introduces quantization noise to the output of FS.
Marijan Jurgo, Romualdas Navickas
doaj   +1 more source

Epilepsy: Epidemiology, Molecular Pathogenesis, and Clinical Management

open access: yesMedComm, Volume 7, Issue 7, July 2026.
Epilepsy is a heterogeneous and chronically evolving brain network disorder. This review integrates epidemiological burden, psychiatric comorbidities, and cyclic seizure patterns with multiscale pathogenic mechanisms, including ion‐channel dysfunction, synaptic transmission defects, neuroinflammation, metabolic and mitochondrial dysfunction, and ...
Jian Liu   +8 more
wiley   +1 more source

Early and Progressive Spinal Cord Atrophy in Spinocerebellar Ataxia Type 1

open access: yesMovement Disorders, Volume 41, Issue 7, Page 1836-1846, July 2026.
Abstract Background Spinocerebellar ataxia type 1 (SCA1) is a rare, autosomal dominant neurodegenerative disorder characterized by progressive cerebellar and brainstem degeneration. Previous studies have shown that spinal cord atrophy is also a key aspect of SCA1 neuropathology.
Colette J.M. Reniers   +11 more
wiley   +1 more source

Considerations for the Design of Sinusoidal Slug Testing Methods

open access: yesGroundwater, Volume 64, Issue 4, Page 498-506, July/August 2026.
Periodic hydraulic tests estimate aquifer properties using controlled groundwater‐level oscillations. Evaluating two sinusoidal slug‐test designs shows large motion errors when transfer‐link and flywheel ratios are high or variable. Rotating‐drive mechanisms are therefore suboptimal; stepper‐motor winches generate more accurate sinusoidal motion ...
Chris Turnadge   +2 more
wiley   +1 more source

Integrated High-Resolution Multi-Channel Time-to-Digital Converters (TDCs) for PET Imaging

open access: yes, 2011
PET with time-of-flight (TOF) capability has been shown to provide a better reconstructed image compared to conventional positron tomography. The increase in SNR mainly depends on the size of the patient being imaged Conti (2009), the intrinsic resolution of the detector and the resolution of the TOF.
Wu Gao   +3 more
openaire   +2 more sources

Influence of Waveform Characteristics on LiDAR Ranging Accuracy and Precision

open access: yesSensors, 2018
Time of flight (TOF) based light detection and ranging (LiDAR) is a technology for calculating distance between start/stop signals of time of flight. In lab-built LiDAR, two ranging systems for measuring flying time between start/stop signals include ...
Xiaolu Li   +4 more
doaj   +1 more source

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