Atomistic simulations of dislocation mobility in Al, Ni and Al/Mg alloys

Dislocation velocities and mobilities are studied by Molecular Dynamics simulations for edge and screw dislocations in pure aluminum and nickel, and edge dislocations in Al-2.5%Mg and Al-5.0%Mg random substitutional alloys using EAM potentials. In the pure materials, the velocities of all dislocations are close to linear with the ratio of (applied stress)/(temperature) at low velocities, consistent with phonon drag models and quantitative agreement with experiment is obtained for the mobility in Al. At higher velocities, different behavior is observed. The edge dislocation velocity remains dependent solely on (applied stress)/(temperature) up to approximately 1.0 MPa/K, and approaches a plateau velocity that is lower than the smallest "forbidden" speed predicted by continuum models. In contrast, above a velocity around half of the smallest continuum wave speed, the screw dislocation damping has a contribution dependent solely on stress with a functional form close to that predicted by a radiation damping model of Eshelby. At the highest applied stresses, there are several regimes of nearly constant (transonic or supersonic) velocity separated by velocity gaps in the vicinity of forbidden velocities; various modes of dislocation disintegration and destabilization were also encountered in this regime. In the alloy systems, there is a temperature- and concentration-dependent pinning regime where the velocity drops sharply below the pure metal velocity. Above the pinning regime but at moderate stresses, the velocity is again linear in (applied stress)/(temperature) but with a lower mobility than in the pure metal.Comment: PDF, 30 pages including figures, submitted to Modelling Simul. Mater. Sci. En

European breast surgical oncology certification theoretical and practical knowledge curriculum 2020

The Breast Surgery theoretical and practical knowledge curriculum comprehensively describes the knowledge and skills expected of a fully trained surgeon practicing in the European Union and European Economic Area (EEA). It forms part of a range of factors that contribute to the delivery of high quality cancer care. It has been developed by a panel of experts from across Europe and has been validated by professional breast surgery societies in Europe. The curriculum maps closely to the syllabus of the Union of European Medical Specialists (UEMS) Breast Surgery Exam, the UK FRCS (breast specialist interest) curriculum and other professional standards across Europe and globally (USA Society of Surgical Oncology, SSO). It is envisioned that this will serve as the basis for breast surgery training, examination and accreditation across Europe to harmonise and raise standards as breast surgery develops as a separate discipline from its parent specialties (general surgery, gynaecology, surgical oncology and plastic surgery). The curriculum is not static but will be revised and updated by the curriculum development group of the European Breast Surgical Oncology Certification group (BRESO) every 2 years

Theoretical investigations on the molecular structure and vibrational spectral analysis of 4-methyl 2-phenylimidazole

WOS: 000312587500006The FT-IR, FT-Raman and FT-NMR spectra of 4-Methyl-2-phenylimidazole (4M2PI)molecule was recorded and analyzed. The tautomeric, structural and spectroscopic analysis of the title molecule was made by using density functional harmonic calculations. For the title molecule, only one tautomeric form was found most stable structure by using B3LYP level with the 6-311G++(d,p) as basis set. Selected experimental bands were assigned and characterized based on the scaled theoretical wave numbers by their total energy distribution (TED). DOI: 10.1134/S0030400X12090032Ahi Evran UniversityAhi Evran University [FBA-11-09]This work was supported by the Research Fund of Ahi Evran University Project Number: FBA-11-09

Effect of high air and soil temperature on yield and some yield components of peanut (Arachis hypogaea L.)

This research was conducted as a main crop in University of Cukurova, Faculty of Agriculture Field Crops Department in 2016 and 2017 growing seasons. The objective of this study was to determine the effect of high air and soil temperature on pod yield and some yield component of peanut (Arachis hypogaea L.) breeding lines in main crop growing season in Mediterranean region in Turkey. In this study, 22 peanut lines (F6 and F7) belonging to Brantley x Halisbey crossing and NC-7 variety (st) were used as a plant material. The experimental design was a Randomized Complete Block with three replications. The main yield component such as pod number, pod weight, 100-seed weight, and pod yield per hectare values of lines were investigated. The maximum air temperature data was recorded day by day during the growing period in both years and average daily maximum air temperatures were higher in 2017 than in 2016. When the pod yield compared in 2016 and 2017, it is found that the pod yield was lower (21.5%) in 2017 than in 2016. The high air and soil temperature was negatively affected the pod yield of peanut breeding lines. It was found that the breeding lines differ in their sensitivity to high temperatures. © 2018, Society of Field Crops Science. All rights reserved