AIM To compare the effect of brushing motion on torsional and cyclic fatigue resistance of TF Adaptive instruments after clinical use. METHODS 20 packs of TFA small sequence (SybronEndo, Orange, CA, USA) were used for this study and divided into two groups. Each instrument prepared one resin tooth, consisting in 4 canals with a complex anatomy. In group A, no brushing motion was performed. In...

[1] It has been shown that Fe charge states greater than and equal to 16 are often observed in the presence of interplanetary coronal mass ejections (ICMEs) at 1 AU. These elevated charge states, representative of hot source regions on the Sun, provide an identifier of ICMEs independent of expansion processes and heliocentric distance. Using this new identifier, we present a comparative study o...

The properties and dynamics of magnetic fields on the Sun’s photosphere and outer layers – notably those within solar active regions – govern the eruptive activity of the Sun. These photospheric magnetic fields also act as the evolving lower boundary of the Sun-Earth coupled system. Quantifying the physical attributes of these magnetic fields and exploring the mechanisms underlying their influe...

BACKGROUND The Marshall-Stickler phenotype is an autosomal dominant trait comprising ocular abnormalities, sensorineural hearing loss, craniofacial anomalies, and anhidrotic ectodermal dysplasia. CASE PRESENTATION A 5-year-old boy from non-consanguineous family in Austria was born with features of Pierre-Robin association (cleft palate, micrognathia, and glossoptosis). Radiological examinatio...

In the recent work of Nakariakov et al. (2004), it has been shown that the time dependences of density and velocity in a flaring loop contain pronounced quasi-harmonic oscillations associated with the 2nd harmonic of a standing slow magnetoacoustic wave. That model used a symmetric heating function (heat deposition was strictly at the apex). This left outstanding questions: A) is the generation...

BACKGROUND Long-term success of endodontic surgeries is often influenced by the type of root-end filling material (RFM). The aim of present study was to compare the marginal adaptation of two different RFM, cold ceramic (CC) and mineral trioxide aggregate (MTA), using scanning electron microscope (SEM). MATERIALS AND METHODS About 20 extracted human single-rooted teeth were collected and stor...

A model to account for observed solar flare statistics in terms of a superposition of independent random flaring elements (assumed to be sites of magnetic reconnection in the coronal magnetic field and hence termed ‘‘ separators ’’) is described. A separator of length l is assumed to flare as a Poisson process in time, with a rate ðlÞ inversely proportional to the Alfvén transit time for the st...

This review focuses on the processes that energize and trigger Mand X-class solar flares and associated flux-rope destabilizations. Numerical modeling of specific solar regions is hampered by uncertain coronal-field reconstructions and by poorly understood magnetic reconnection; these limitations result in uncertain estimates of field topology, energy, and helicity. The primary advances in unde...

Context. During the first close perihelion pass of Solar Orbiter, a series impulsive 3 He-rich solar particle events was observed on 18–19 March 2022 from distance 0.36 au. In addition to energetic particle, radio, and X-ray data were in radio and/or extreme ultraviolet by STEREO-A, SDO, Wind, Parker Probe. Aims. Observations event along with remote sensing flaring emission only small timing de...

Many astrophysical phenomena are time-varying, in the sense that their intensity, energy spectrum, and/or spatial distribution of emission suddenly change. This paper develops a method for modeling time series images. Under assumption arrival times photons follow Poisson process, data binned into 4D grids voxels (time, band, and x-y coordinates), viewed as non-homogeneous The assumes at each po...