Whitfieldchavez7907

A double-distribution-function based lattice Boltzmann method (DDF-LBM) is proposed for the simulation of polyatomic gases in the supersonic regime. The model relies on a numerical equilibrium that has been extensively used by discrete velocity methods since the late 1990s. Here, it is extended to reproduce an arbitrary number of moments of the Maxwell-Boltzmann distribution. These extensions to the standard 5-constraint (mass, momentum and energy) approach lead to the correct simulation of thermal, compressible flows with only 39 discrete velocities in 3D. The stability of this BGK-LBM is reinforced by relying on Knudsen-number-dependent relaxation times that are computed analytically. Hence, high Reynolds-number, supersonic flows can be simulated in an efficient and elegant manner. While the 1D Riemann problem shows the ability of the proposed approach to handle discontinuities in the zero-viscosity limit, the simulation of the supersonic flow past a NACA0012 aerofoil confirms the excellent behaviour of this model in a low-viscosity and supersonic regime. The flow past a sphere is further simulated to investigate the 3D behaviour of our model in the low-viscosity supersonic regime. The proposed model is shown to be substantially more efficient than the previous 5-moment D3Q343 DDF-LBM for both CPU and GPU architectures. selleckchem It then opens up a whole new world of compressible flow applications that can be realistically tackled with a purely LB approach. This article is part of the theme issue 'Fluid dynamics, soft matter and complex systems recent results and new methods'.Background In the era of personalized medicine, there has been an increase in demand on cytopathology service to perform rapid onsite evaluation of touch imprints (ROSETIs) of needle core biopsies (NCBs) to ensure sample adequacy and provide preliminary diagnosis. Limited publications have addressed use of telecytopathology for ROSETIs. We present our experience with telecytopathology-guided ROSETIs of NCBs. Materials and Methods Cytotechnologist onsite transmitted real-time images of Diff-QUIK stained touch imprints of NCBs using an Olympus digital camera through Ethernet to a pathologist. The preliminary diagnosis from telecytopathology-guided ROSETIs was compared with that of the final NCB for diagnostic accuracy. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated. Results Of 186 cases, 163 (87%) were concordant and 23 (13%) were discordant. Of the 23 discordant cases, 14 (58%) were diagnosed as benign with final NCB diagnoses as malignant and 9 (41%) were suspicious on ROSETIs with final NCB diagnoses as benign. The causes of discordance among cases categorized as benign on preliminary and malignant on final included interpretative error (9) and sampling (6). Six cases categorized as suspicious on preliminary and negative on final biopsy diagnosis correlated with concurrent fine-needle aspiration, raising the possibility of loss of diagnostic areas in processed tissue cores. Remaining three cases in this category represented misinterpretation of reactive cells. Sensitivity, specificity, PPV, and NPV were 87.9%, 95.7%, 97.1%, and 82.7%, respectively. Conclusions Telecytopathology-guided ROSETI yields high accuracy for preliminary interpretation of NCBs and may be utilized as an effective substitute for conventional microscopy.Emerging evidence suggests that atrial fibrillation (AF) may be associated with an increased risk of sudden cardiac death (SCD). However, AF shares risk factors with numerous cardiac conditions, including coronary heart disease and heart failure-the 2 most common substrates for SCD-making the AF-SCD relationship particularly challenging to address. A careful consideration of confounding factors is essential, since interventions for AF will be effective in reducing SCD only if there is a causal association between these 2 conditions. In this translational review, we detail the plausible underlying pathophysiological mechanisms through which AF may promote or lead to SCD, as well as the existing epidemiological evidence supporting an association between AF and SCD. While the role of AF in predicting SCD in the general population appears limited and not established, AF might be integrated to improve risk stratification in some specific phenotypes. Optimal AF management, including that of its associated conditions, appears to be of interest to prevent AF-related SCD, especially because the AF-SCD relationship is in part driven by heart failure.Objective This retrospective study aimed to assess the recurrence of frenulum attachment and clinical parameters following conventional and diode laser-assisted frenectomy in patients with abnormal frenulum insertions. Material and methods The records of 429 patients who underwent maxillary labial frenectomy between 2016 and 2018 were screened. A total of 70 records were included and evaluated based on gender, age, frenulum type, presence of diastema, periodontal disease, and surgical technique. Plaque index (PI), gingival index (GI), and probing depth (PD) were evaluated at baseline and 6 weeks postoperatively. Recurrence was determined by assessing the alteration in the distance from the frenulum attachment to the mucogingival junction (FMGJ) at baseline, 6 weeks, and 12 months. Results Out of 70 patients (female/male 47/23; age 35.24 ± 11.69 years), 32.9% presented gingival, 38.6% papillary, and 28.6% papilla-penetrating frenulum attachments. Clinical parameters and mean FMGJ values between the conventional (n = 36) and diode laser (n = 34) groups demonstrated no differences at baseline (p > 0.05). PI and GI were significantly higher in the conventional group (p  0.05) at 6 weeks. No recurrence was observed in any of the patients at the sixth week. Moreover, 31 participants in the conventional group and 33 participants in the diode-laser group, a total of 64 patients (91.43%), did not present recurrence after 12 months. Conclusions Within the limits of the study, considering the absence of recurrence in all types of abnormal frenulum insertions in both treatment groups, it was concluded that the diode laser could be used effectively as an alternative to the conventional frenectomy technique.