Results 81 to 90 of about 474,940 (289)

ОЦЕНКА СТЕПЕНИ НЕСИНУСОИДАЛЬНОСТИ ФОРМЫ НАПРЯЖЕНИЯ В АВТОНОМНОЙ ЭЛЕКТРОЭНЕРГЕТИЧЕСКОЙ СИСТЕМЕ С ИСПОЛЬЗОВАНИЕМ МЕТОДА ИМИТАЦИОННОГО МОДЕЛИРОВАНИЯ

open access: yesElektrotehnìka ta Elektroenergetika, 2008
Предложена основанная на имитационном моделировании методика численного определения коэффициента несинусоидальности напряжения синхронного генератора при импульсном возбуждении.
L. N. Kanov
doaj  

Finite element analysis of the stress and buckling behaviour of cylindrical oil tank under internal pressure

open access: yesCogent Engineering
Storage tanks are essential components in various industries, particularly in power generation, where they are utilized for oil storage. The stress developed within these tanks due to internal pressure significantly influences their useful life and ...
Themba Mashiyane   +2 more
doaj   +1 more source

Kummî Tefsirinde Kur’ân’ın Metni Konusundaki Tahrif İddialarının İncelenmesi

open access: yesCumhuriyet İlahiyat Dergisi, 2017
Öz: Bu çalışmada Şîa’nın temel kaynaklarından olan Tefsîru’l-Kummî’de Kur’ân’ın metni konusunda yer alan tahrif iddiaları incelenmiştir. İlk dönem Şiî âlimlerinden olan Kummî (ö.
Nesrişah Saylan
doaj   +1 more source

White Matter and Perivascular Imaging Changes in Alzheimer's Disease and Cerebral Amyloid Angiopathy

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Peak‐width of skeletonized mean diffusivity (PSMD) and diffusion tensor imaging–analysis along the perivascular space (DTI‐ALPS), reflecting white matter integrity and glymphatic function, are altered in Alzheimer's disease (AD).
Debina Laishram   +3 more
wiley   +1 more source

Rolling to control residual stress and distortion in friction stir welds [PDF]

open access: yes, 2010
Considerable residual stress and distortion can be produced by friction stir welding, impeding industrial implementation. Finite element analysis has been used to develop three innovative rolling methods that reduce residual stress and distortion in ...
Colegrove, Paul A.   +11 more
core   +1 more source

Retractions in Rheumatology: Trends, Causes, and Implications for Research Integrity

open access: yesArthritis Care &Research, EarlyView.
Objective We aimed to describe the trends and main reasons for study retraction in rheumatology literature. Methods We reviewed the Retraction Watch database to identify retracted articles in rheumatology. We recorded the main study characteristics, authors’ countries, reasons for retraction, time from publication to retraction, and trends over time ...
Anna Maria Vettori, Michele Iudici
wiley   +1 more source

The Effect of Pacemakers and Defibrillators on Distortion in 2 Magnetic Resonance Imaging (MRI) Sequences Commonly Used in Radiation Oncology Practice—3D True Fast Imaging with Steady State Precession (TrueFISP) at 0.35T MR-Linear Accelerator (LINAC) and 3D T1 at 3T MR Simulator

open access: yesRadiation
Background: We aimed to measure the pacemaker- and defibrillator-induced distortion at 0.35T and 3.0T magnetic fields. Methods: The pacemaker/defibrillator was placed at the top center of a water-filled/MagPhan phantom, followed by a T1 scan at 3T and a ...
Alireza Omidi   +3 more
doaj   +1 more source

High Health Care Utilization Preceding Diagnosis With Juvenile Idiopathic Arthritis

open access: yesArthritis Care &Research, EarlyView.
Objective Although early diagnosis improves long‐term outcomes, patients with juvenile idiopathic arthritis (JIA) often experience prolonged, circuitous paths to diagnosis. To inform diagnostic improvement, we sought to characterize health care utilization in the year preceding diagnosis. Methods We identified 10,021 patients with an incident diagnosis
Anna Costello   +5 more
wiley   +1 more source

Development of a Numerical Tool for Laminate Composite Distortion Computation Through a Dual-Approach Strategy

open access: yesApplied Sciences
Unintended shape distortions, such as spring-in, spring-back, and warping, commonly occur during the curing process of laminate composites. The source of dimensional changes at the macro-scale is residual stress.
Cesar Banu, Mihai Bugaru
doaj   +1 more source

Improved estimation for Saleh model and predistortion of power amplifiers using 1-dB compression point

open access: yesThe Journal of Engineering, 2019
This paper proposes an improved estimation approach for modelling RF power amplifiers (PAs) using the Saleh behavioural model. The proposed approach is appropriate for solid-state PA technologies.
Haider Al-kanan, Xianzhen Yang, Fu Li
doaj   +1 more source

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