Results 161 to 170 of about 286,579 (299)

A Differential Turbo Detection Aided Sphere Packing Modulated Space-Time Coding Scheme

open access: yes, 2006
A signal construction method that combines orthogonal design with sphere packing has recently shown useful performance improvements over the conventional orthogonal design.
Alamri, O., Hanzo, L., Wu, N.
core  

Some Insects Are More Equal Than Others: A Comparison of Popular Large Language Model Chatbots' Treatment of Different Insect Groups 昆虫间的不平等——主流大语言模型 (LLM) 对不同昆虫评价的比较研究

open access: yesIntegrative Conservation, EarlyView.
Our research demonstrates that in mirroring prevailing human biases towards different insect groups, LLM chatbots oversimplify insect diversity by predominantly restricting “bees” to honeybees and “wasps” to yellowjackets, neglecting the majority of biodiversity that includes wild bees and parasitoid wasps, while also favouring Nearctic species in ...
Marina Moser   +2 more
wiley   +1 more source

White matter microstructure and longitudinal relaxation time anisotropy in human brain at 3 and 7 T

open access: yesNMR in Biomedicine, Volume 36, Issue 1, January 2023., 2023
White matter (WM) with high structural anisotropy T1 shows angular dependency on B0. At 3T, a T1 peak at 54° and flat baseline across 0° and 90° are observed in WM [Panel A, T1 as a function of fibre‐to‐filed angle (q)]. At 7T, the T1 peak is centred at 40°.
Risto A. Kauppinen   +4 more
wiley   +1 more source

Assessing muscle‐specific potassium concentrations in human lower leg using potassium magnetic resonance imaging

open access: yesNMR in Biomedicine, Volume 36, Issue 1, January 2023., 2023
The feasibility of tissue potassium concentration (TPC) determination in individual lower leg muscles using 39K MRI at 7 T was evaluated in 14 healthy subjects. For quantification, we propose a region‐based partial volume correction approach using tissue masks extracted from high‐resolution 1H MRI data in combination with an individual signal decay for
Lena V. Gast   +8 more
wiley   +1 more source

Free‐breathing accelerated whole‐body MRI using an automated workflow: Comparison with conventional breath‐hold sequences

open access: yesNMR in Biomedicine, Volume 36, Issue 2, February 2023., 2023
Free‐breathing whole‐body MRI in tandem with an automated user interface yielded similar diagnostic accuracy at equivalent image quality and shorter acquisition times compared with breath‐hold MR sequences. Scores for patient satisfaction were significantly better for free‐breathing compared with breath‐hold examinations, including significant ...
Vitali Koch   +17 more
wiley   +1 more source

Multiparametric renal magnetic resonance imaging: A reproducibility study in renal allografts with stable function

open access: yesNMR in Biomedicine, Volume 36, Issue 2, February 2023., 2023
Reproducibility of a multiparametric MRI protocol including Pseudo‐Continuous Arterial Spin Labeling (PCASL), intravoxel incoherent motion (IVIM), and T1 mapping sequences was assessed, and normal values of the measured parameters were characterized in renal transplant patients with stable function.
Rebeca Echeverria‐Chasco   +8 more
wiley   +1 more source

Home - About - Disclaimer - Privacy