Results 131 to 140 of about 247,048 (296)
Mathematics and explanation in astronomy and astrophysics [PDF]
, 2007 The purpose of this paper is to expound and clarify the mathematics and explanations commonly employed in certain notable areas of astronomy and astrophysics.
McCabe, Gordon, Gordon Mccabe
core
Human In Vivo Validation of Frequency‐Dependent QTI
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose The aim of this work is to investigate if q‐space trajectory imaging (QTI) waveforms can be designed to probe QTI metrics at a single centroid frequency under realistic experimental conditions for in vivo human brain imaging. Methods Realistic diffusion encoding waveforms based on double‐rotation gradient waveform and magic‐angle ...
Svenja Niesen +3 more
wiley +1 more source
Amateur Astronomy and Astronomy Education in India
, 2015 In India, astronomy has been studied from the beginning of civilization. The word amateur means involvement in work for pleasure rather than as a profession. So, amateur astronomers, in many places, prefer to be called non-professional astronomers.
Chatterjee, Somenath
core +1 more source
Free‐Breathing Hepatic Oxygen Extraction Fraction (OEF) Mapping Using Radial GESSE
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Noninvasive assessment of hepatic oxygenation is relevant for evaluating liver both in acute and long‐term liver pathologies. However, existing methods are limited to single‐slice acquisitions and require breath‐holding. This study aims to develop and evaluate a motion‐robust technique for whole‐liver oxygen extraction fraction (OEF ...
Ke Zhang +9 more
wiley +1 more source
Evaluation of 7 Tesla pTx Body Coils Regarding Transmit and Receive Performance
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Most sites develop and use custom coils for 7 T body MRI since no standard pTx body coil exists, leading to diverse coil designs differing in transmit element type, layout, and number of receive channels. This study investigates and compares eight existing coils, including one remote body coil array and seven local arrays, regarding ...
Johannes A. Grimm +11 more
wiley +1 more source
The State of Astronomy Education in the U.S.
, 1996 I would like to set the scene for the discussion that will follow in this book and bring up a few disturbing points which I believe any discussion about astronomy education will ultimately have to address.
Fraknoi, Andrew
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Ultimate Intrinsic SNR Depends on B0 Orientation
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose This work aims to investigate the effect of B0$$ {B}_0 $$ orientation on the uiSNR in MRI. Methods Electromagnetic simulations were performed on both realistic body models and simplified geometric models. Comparisons between (1) opposite B0$$ {B}_0 $$ directions along the head‐foot (HF) axis, corresponding to head‐first and feet‐first ...
Yuting Wang +4 more
wiley +1 more source
ALMA - the Atacama large millimeter array
, 2004 The Atacama Large Millimeter Array (ALMA) is a major ground-based telescope for millimeter and submillimeter astronomy to be realized during this decade.
Wild, W +4 more
core +1 more source
Design of an In Vivo‐Like Phantom for Quantitative Body CEST MRI
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose To design and validate a reproducible in vivo‐like fat‐containing CEST phantom that enables robust quantitative CEST MRI for body applications by providing physiologically realistic relaxation properties, relevant endogenous CEST contrasts (amide, guanidino, rNOE, and semi‐solid MT), and a controlled fat component.
Petr Menshchikov +5 more
wiley +1 more source
Astronomy is a collaborative effort (The Real Astronomy)
, 2009 Professional Astronomers talk about the importance of collaborations for astronomy. Many astronomy projects are now so large in scope that they are often conducted in large teams.
Centre for Astrophysics and Supercomputing
core +1 more source