Results 111 to 120 of about 50,418 (238)

A Low‐Cost and Compact High‐Frequency Gallium Nitride Gradient Power Amplifier for Low‐Field MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To reduce the upfront cost of small, low‐field MRI systems, while expanding the capabilities of their gradient systems. Methods A gradient power amplifier was designed to leverage the lowering cost of Gallium Nitride (GaN) power transistors and high speed logic, to achieve high efficiency and responsiveness for driving gradient coils ...
N. Reid Bolding, Jacob Hannan, Christopher Vaughn, Aria Patel, Snow Lin, Jessie E. P. Sun, William Grissom, Mark A. Griswold   +7 more
wiley   +1 more source

Strong‐Gradient Diffusion‐Weighted Imaging of Prostate Cancer Using an Inside‐Out Nonlinear Gradient Coil

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To demonstrate improved image quality and lesion conspicuity in prostate diffusion‐weighted imaging (DWI) using an inside‐out nonlinear gradient coil that provides locally strong gradients (200–500 500 mT/m) at typical prostate positions.
Horace Z. Zhang, Nahla M. H. Elsaid, Terence W. Nixon, Andrew Dewdney, Dana C. Peters, Jeffrey C. Weinreb, Preston C. Sprenkle, R. Todd Constable, Gigi Galiana   +8 more
wiley   +1 more source

Time‐resolved 3D imaging opportunities with XMPI at ForMAX

Journal of Synchrotron Radiation, EarlyView.
The first implementation of X‐ray multi‐projection imaging (XMPI) at the ForMAX beamline (MAX IV) enables the acquisition of multiple projections simultaneously without requiring sample rotation. This approach facilitates volumetric studies of fast dynamics at frame rates of 12.5 kHz with micrometre resolution, with the potential of even higher speeds,
Julia Katharina Rogalinski, Zisheng Yao, Yuhe Zhang, Zhe Hu, Korneliya Gordeyeva, Tomas Rosén, Daniel Söderberg, Andrea Mazzolari, Jackson da Silva, Vahid Haghighat, Samuel A. McDonald, Kim Nygård, Eleni Myrto Asimakopoulou, Pablo Villanueva-Perez   +13 more
wiley   +1 more source

Analisa dan Implementasi Transformasi Analog to Digital Converter (ADC) untuk Mengkonversi Suara Kebentuk Teks

SATIN - Sains dan Teknologi Informasi, 2018
Teknologi telah banyak membawa perubahan pada kehidupan manusia, sehingga memberikan dampak positif dan negatif. Menurut hasil beberapa penelitian menunjukkan bahwa daya serap manusia terhadap sebuah informasi adanya ketidaksamaan tingkatan, salah satu yang menyebabkan demikian adalah pilihan jenis media yang digunakan.
openaire   +1 more source

AutoChamber: A broadly accessible 3D‐printed floating chamber to automate measurements of greenhouse gas emissions from surface waters

Methods in Ecology and Evolution, EarlyView.
Abstract Fresh waters provide environmental conditions that favour microbial CO2 and CH4 production, leading to the release of large quantities of greenhouse gases (GHG) to the atmosphere. Despite their importance, these fluxes remain poorly defined, weakening estimates of global GHG budgets that are critical in implementing effective climate ...
Benjamin J. Archer, Peter Casper, Mark O. Gessner   +2 more
wiley   +1 more source

ESPERDYNE: A dual‐band heterodyne monitor and ultrasound recorder for bioacoustic field surveys

Methods in Ecology and Evolution, EarlyView.
Abstract Background. Ultrasonic monitoring is essential for ecological studies of bats and other animals, yet high‐performance field devices remain prohibitively expensive and inaccessible—particularly in biodiversity‐rich regions with limited research infrastructure.
Ravi Umadi
wiley   +1 more source

Channel estimation and MIMO combining architecture in millimeter wave cellular system with few ADC bits

Journal of Engineering and Applied Science
Hybrid combiner and precoder architectures, radio frequency (RF) chain, analog phase shifters, digital-to-analog converter (DAC), and analog-to-digital converter (ADC) are components of a millimeter wave cellular system.
Akeem Abimbola Raji, Joseph Folorunso Orimolade, Kamoli Akinwale Amusa, Isaiah Adediji Adejumobi   +3 more
doaj   +1 more source

Methyl Jasmonate Seed Priming Mitigates the Defence‐Growth Trade‐Off and Tailors Plant Response to Specific Pests

Plant, Cell &Environment, EarlyView.
ABSTRACT Seed defence priming is emerging as a novel, cost‐efficient and environmentally safe tool for pest management. It has been proposed as a means to uncouple the defence‐growth trade‐off in plants by enhancing defence responses with minimal fitness costs, but the mechanisms underlying this role remain elusive.
Lucia Talavera‐Mateo, Adrian Sabater‐Gabriel, Alejandro Garcia, Marta Marina Perez‐Alonso, Rayko Halitschke, M. Estrella Santamaria   +5 more
wiley   +1 more source

Modulation of slow and fast oscillations by direct current stimulation in the cerebral cortex in vitro

The Journal of Physiology, EarlyView.
Abstract figure legend Direct‐current (DC) electric fields modulate spontaneous slow oscillations in cerebral cortex slices in vitro. Schematic of the in vitro preparation (upper panels). Spontaneous slow oscillations (SO; <1 Hz) consisting of alternating Up (active) and Down (silent) states were observed under control conditions.
Mattia D'Andola, Julia F. Weinert, Joana Covelo, Maurizio Mattia, Maria V. Sanchez‐Vives   +4 more
wiley   +1 more source

The Design of a Low-Noise CMOS Image Sensor Using a Hybrid Single-Slope Analog-to-Digital Converter

Sensors
In this study, we describe a low-noise complementary metal-oxide semiconductor (CMOS) image sensor (CIS) with a 10/11-bit hybrid single-slope analog-to-digital converter (SS-ADC).
Hyun Seon Choo, Da-Hyeon Youn, Hyunggyu Choi, Gi Yeol Kim, Soo Youn Kim   +4 more
doaj   +1 more source