A model is provided for crack problem in a functionally graded semi-infinite plate under an anti-plane load. The characteristic of material behavior is assumed to change in a linear manner along the plate length. Also the embedded crack is placed in the direction of the material change. The problem is solved using two separate techniques. Primary, by applying Laplace and Fourier transformation,...

Accurate stress field calculation of the casing-cement-stratum system is crucial for evaluating wellbore integrity. Previous models treated in-situ as boundary pressure loads, leading to unrealistic infinite displacements at infinity. This study presents a three-dimensional (3D) analytical solution within in inclined wells, considering and hydrostatic cement initial state taking into account co...

The title compound 1-OPBB, C(19)H(19)BrO(2), contains a dechlorinated and hydrogenated isodrin backbone with an anti-4-bromo-benzoate substituent at one of the methano bridges. The dihedral angle between the CO(2) ester plane and the benzene ring plane is 8.5 (2)°. In the crystal, the ester groups stack over benzene rings: the mol-ecules pack as conformational enanti-omers, with nearest paralle...

In the title compound, C(19)H(30)N(2)O, the fused ring system is essentially planar, the maximum deviation from the mean plane being 0.013 (2) Å for the N atom bearing the dodecyl chain. The 1-dodecyl group is almost perpendicular to the 1H-benzo[d]imidazol-2(3H)-one plane as indicated by the dihedral angle of 82.9 (2)°between planes through the fused ring system and the first three C atoms of ...

We studied the scalar electrodynamics (SQED4) and the spinor electrodynamics (QED4) in the null-plane formalism. We followed the Dirac’s technique for constrained systems to perform a detailed analysis of the constraint structure in both theories. We imposed the appropriated boundary conditions on the fields to fix the hidden subset first class constraints which generate improper gauge transfor...

We calculate elastic moduli and viscosities for media containing strongly interacting in-plane shear cracks. The cracks are randomly oriented or aligned, with equal length or a logarithmic size distribution. Our results from both a boundary element and a finite-element method suggest that the average moduli are best approximated by a differential, self-consistent model (DEM). Thus crack-tocrack...

Lumbopelvic rhythm illustrates the relative motion between lumbar spine and pelvis during various activities such as lifting running could be used a biomarker for low back pain (LBP). Sagittal plane lumbopelvic has been extensively examined surrogate to measure risk factor, but trunk rotation, second component of couple is commonly missed. Since are time series not discrete variables, machine l...

adult-onset still’s disease (aosd) is a rare systemic inflammatory disorder of unknown etiology. there is not currently any specific serological markers for aosd , and  diagnosis still relying on the exclusion of other likely diagnoses. yamaguchi’s criteria are used as a diagnostic criterion which contains negative serologic markers for other collagen vascular diseases including systemic lupus ...

nigella sativa has attracted healers in ancient civilizations and researchers in recent times. traditionally, it has been used in different forms to treat many diseases including asthma, hypertension, diabetes, inflammation, cough, bronchitis, headache, eczema, fever, dizziness and influenza. experimentally, it has been demonstrated that n. sativa extracts and the main constituent of their vola...