Results 131 to 140 of about 2,845,265 (325)

Importance of Apparent Diffusion Coefficient in Differentiation of Cerebral Tumors

Nigerian Journal of Clinical Practice
Background: Diffusion-weighted magnetic resonance imaging (MRI) is an advanced functional imaging method based on the molecular motion of water. The diffusion of the water molecules in the tissue is dependent on a number of factors.
Sağlam, S.Y., Kökcü, F., Çeker, M.E.
openaire   +3 more sources

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

Advanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran, Vincent Nebel, Dominik Perius, Kshitij Kumar, Yannis Heim, Laura Bies, Tobias Kraus   +6 more
wiley   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

Advanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi, Hadi Moutablaleh, Ignatius A. Setiawan, Mehrshad Mehrpouya   +3 more
wiley   +1 more source

Time-dependent diffusion coefficient of proton in polymer electrolyte membrane [PDF]

, 2009
We investigated the time-dependent self-diffusion coefficients of water, D(T eff), in polymer electrolyte membranes at 278 K. TheD(T eff) was measured from T eff=0.7 to 100 ms by field gradient NMR techniques.
Ohkubo, Takahiro, Ohira, Akihiro, Kidena, Koh   +2 more
core   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

Relationship between cognitive impairment and apparent diffusion coefficient values from magnetic resonance-diffusion weighted imaging in elderly hypertensive patients

, 2014
Yanwei Zhao,1 Gang Wu,2 Haiming Shi,3,4 Zhijie Xia,1 Tao Sun3,4 1Emergency Department, Huashan Hospital North, Fudan University, Shanghai, People’s Republic of China; 2Emergency Department, Huashan Hospital, Fudan University, Shanghai, People ...
Zhao YW, Sun T, Wu G, Shi HM, Xia ZJ
core  

Apparent diffusion coefficient in differentiation of pediatric posterior fossa tumors

, 2017
Purpose To investigate the contribution of preoperative apparent diffusion coefficient (ADC) values in the differential diagnosis of pediatric posterior fossa ...
Selim Doganay, Gonca Koc, Sibel Saracoglu, Kazim Z. Gumus, Soubhi Zitouni, KURTSOY, Ali, PER, Hüseyin, Huseyin Per, GUMUS, Kazim Z., Saliha Ciraci, ÜNAL, Ekrem, Olgun Kontas, SARAÇOĞLU, Sibel, Ali Kurtsoy, COŞKUN, Abdulhakim, Kontas, Olgun, Abdulhakim Coskun, Zitouni, Soubhı, Doganay, Selim, Ekrem Unal, Koc, Gonca, Ciraci, Saliha   +21 more
core   +1 more source

The Influence of Field‐Assisted Sintering Technology (FAST) Temperature and Cooling Rate on the Microstructural Evolution in Gamma‐Titanium Aluminide Alloy GE4822

Advanced Engineering Materials, EarlyView.
Controlling the Field Assisted Sintering Technology (FAST) parameters, dwell temperature and cooling rate, significantly influences the microstructural evolution in titanium aluminide GE4822. Significant γ‐lamellar colonies develop only upon cooling through the α‐transus.
Jack Krohn, James Pepper, Martin Jackson
wiley   +1 more source

Factors affecting diffusion coefficient of the hydroxide ion in aqueous tetraalklylammonium nitrate solutions

, 1994
The effect of OH concentration on its diffusion coefficient in aqueous Me4NN03 and BU4NN03 solutions at total ionic strength of 0.50 mol dm-3 was studied. The diffusion coefficient was found to increase from a Iow value and reached a steady-state.
McDougall, A.O., Al-Mayouf, A.M.
core  

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source