Results 81 to 90 of about 494,691 (265)

Complete lesion resection and early surgical intervention are favorable factors for long‐term seizure freedom in drug‐resistant epileptic spasms

open access: yesEpilepsia Open, EarlyView.
Abstract Objective Epileptic spasms (ES) in children carry a high risk of neurodevelopmental delay, yet predictors of long‐term surgical outcome remain incompletely defined. This study aimed to evaluate seizure outcomes following epilepsy surgery and to identify independent prognostic factors for postoperative recurrence.
Hua Li   +7 more
wiley   +1 more source

Using positron annihilation spectroscopy for the control of humidity-sensitive processes in nanoporous MgAl2O4 ceramics

open access: yesТехнологія та конструювання в електронній апаратурі, 2006
Nanoporous spinel‑type MgAl2O4 ceramics sintered at 1100 and 1400 °C, considered as promising materials for humidity sensors, were investigated using positron annihilation lifetime spectroscopy (PALS). It is demonstrated that PALS can be applied to study
H. I. Klym   +5 more
doaj  

On the positron annihilation spectroscopy and tensile behavior of COOH-MWCNT/epoxy nanocomposites [PDF]

open access: yesJournal of Particle Science and Technology
Positron Annihilation Lifetime Spectroscopy (PALS) is sensitive to the material voids/free volume on the atomic scale. For this reason, this method has been used as a unique technology to measure the free volume and structural defects in polymers in ...
Mohammad Koohkan   +2 more
doaj   +1 more source

Research advances in metal halides for flexible indirect X‐ray imaging

open access: yesFlexMat, EarlyView.
This review focuses on the preparation of flexible scintillators and provides an in‐depth discussion of the preparation methods and optimization of flexible films and flexible amorphous materials for MHs X‐ray indirect detectors. The content covers characterization methods for flexible materials, the selection of flexible substrates, optimization ...
Tianyu Xie   +3 more
wiley   +1 more source

Development of an Intense Positron Beam lifetime spectrometer

open access: yes, 2022
A new intense positron beam lifetime spectrometer is being developed at the Reactor Institute Delft that should be able to perform positron lifetime measurements with depth profiling.
Boekel, Mark (author)
core  

Positron-annihilation lifetime spectroscopy using electron Bremsstrahlung [PDF]

open access: yes, 2015
A new type of an intense source of positrons for materials research has been set up at the superconducting electron linear. The source employs hard X-rays from electron- bremsstrahlung production generating energetic electron-positron pairs inside the ...
Fiedler, F.   +7 more
core   +1 more source

Human biomarker navigator

open access: yesiMeta, EarlyView.
The Human Biomarker Navigator integrates the disease continuum, biomarker dynamics, cross‐organ biomarker networks, biomarker classification, and technology‐driven paradigms. It maps how biomarkers link multi‐system physiology and pathology across the nervous, respiratory, endocrine, circulatory, immune, digestive, urinary, reproductive, and ...
Meng‐Yao Li   +29 more
wiley   +1 more source

Positron annihilation lifetime spectroscopy study of roller burnished magnesium alloy

open access: yesNukleonika, 2015
The effect of roller burnishing on Vickers’ hardness and positron lifetimes in the AZ91HP magnesium alloy was studied. The microhardness increases with an increase in the burnishing force and with a decrease in the feed. The comparison of various methods
Zaleski Radosław   +2 more
doaj   +1 more source

Gallium vacancy and the residual acceptor in undoped GaSb studied by positron lifetime spectroscopy and photoluminescence

open access: yes, 2002
Positron lifetime, photoluminescence (PL), and Hall measurements were performed to study undoped p-type gallium antimonide materials. A 314 ps positron lifetime component was attributed to Ga vacancy (V-Ga) related defect.
Zhao YW   +10 more
core  

Home - About - Disclaimer - Privacy