Thin films flowing down inverted substrates: Three dimensional flow

We study contact line induced instabilities for a thin film of fluid under destabilizing gravitational force in three dimensional setting. In the previous work (Phys. Fluids, {\bf 22}, 052105 (2010)), we considered two dimensional flow, finding formation of surface waves whose properties within the implemented long wave model depend on a single parameter, $D=(3Ca)^{1/3}\cot\alpha$, where $Ca$ is the capillary number and $\alpha$ is the inclination angle. In the present work we consider fully 3D setting and discuss the influence of the additional dimension on stability properties of the flow. In particular, we concentrate on the coupling between the surface instability and the transverse (fingering) instabilities of the film front. We furthermore consider these instabilities in the setting where fluid viscosity varies in the transverse direction. It is found that the flow pattern strongly depends on the inclination angle and the viscosity gradient

Annihilation of vortex dipoles in an Oblate Bose-Einstein Condensate

We theoretically explore the annihilation of vortex dipoles, generated when an obstacle moves through an oblate Bose-Einstein condensate, and examine the energetics of the annihilation event. We show that the gray soliton, which results from the vortex dipole annihilation, is lower in energy than the vortex dipole. We also investigate the annihilation events numerically and observe that the annihilation occurs only when the vortex dipole overtakes the obstacle and comes closer than the coherence length. Furthermore, we find that the noise reduces the probability of annihilation events. This may explain the lack of annihilation events in experimental realizations.Comment: 8 pages and 9 figure

GASTROESOPHAGEAL REFLUX DISEASE IN PATIENTS WITH FUNCTIONAL DYSPEPSIA AND CONSTIPATION PREDOMINANT IRRITABLE BOWEL SYNDROME: CLINICAL FEATURES AND EFFICACY OF LACTULOSE AND ITOPRIDE HYDROCHLORIDE

Background: The frequent coexistence of gastroesophageal reflux disease (GERD) with functional dyspepsia (FD) and an irritable bowel syndrome (IBS) has been described in the literature. Aim: To study the specific features of GERD clinical course and diagnosis in patients with GERD in combination with FD and constipation predominant IBS (IBS-C) in comparison to patients with isolated GERD; to assess the efficacy of lactulose and itopride hydrochloride. Materials and methods: A total of 60 patients with GERD, FD (Rome criteria III), and IBS-C (Rome criteria III) and 29 patients with isolated GERD were examined. GERD diagnosis was based on clinical, endoscopic, and pH-metric criteria. For 4 weeks 10 patients with combination of non-erosive reflux disease (NERD), FD and IBS-C received lactulose monotherapy and other 10 patients received combination of lactulose with itopride hydrochloride. Clinical symptoms and pH-metric parameters were assessed before and 4 weeks after treatment. Results: Combination of GERD, FD and IBS-C was noted more frequently in women under 40 with normal body mass index (р<0.05). Classic GERD symptoms were absent in 43.4% of patients with gastrointestinal comorbidity and in 10.3% of patients with isolated GERD (р=0.004). A higher prevalence of belching and nausea was found in patients, suffering from GERD, FD and IBS-C, than in those with isolated GERD (р<0.05). After 4-week lactulose and itopride hydrochloride treatment all the patients with GERD, FD and IBS-C showed a reduction of clinical symptoms (p<0.05) and normalization of pH-metric parameters (р<0.001). Conclusion: GERD course in patients with concomitant FD and IBS-C has the following peculiarities: predominance of women, absence of classic GERD-symptoms in almost half of these patients, and frequent combination with other functional symptoms. Combination therapy with lactulose and itopride hydrochloride enables successful control of GERD and FD symptoms as well as esophageal pH normalization

The Modified Weighted Slab Technique: Models and Results

In an attempt to understand the source and propagation of galactic cosmic rays we have employed the Modified Weighted Slab technique along with recent values of the relevant cross sections to compute primary to secondary ratios including B/C and Sub-Fe/Fe for different galactic propagation models. The models that we have considered are the disk-halo diffusion model, the dynamical halo wind model, the turbulent diffusion model and a model with minimal reacceleration. The modified weighted slab technique will be briefly discussed and a more detailed description of the models will be given. We will also discuss the impact that the various models have on the problem of anisotropy at high energy and discuss what properties of a particular model bear on this issue.Comment: LaTeX - AASTEX format, Submitted to ApJ, 8 figures, 20 page

Fusion of Lagrangian drifter data and numerical model outputs for improved assessment of turbulent dispersion

Transport and dispersion processes in the ocean are crucial, as they determine the lifetime and fate of biological and chemical quantities drifting with ocean currents. Due to the complexity of the coastal ocean environment, numerical circulation models have difficulties to accurately simulate highly turbulent flows and dispersion processes, especially in highly energetic tidal basins such as the eastern English Channel. A method of improving the results of coastal circulation modeling and tracer dispersion in the Dover Strait is proposed. Surface current velocities derived from Lagrangian drifter measurements in November 2020 and May 2021 were optimally interpolated in time and space to constrain a high-resolution coastal circulation MARS model, with careful attention given to selecting ensemble members composing the model covariance matrix. The space–time velocity covariances derived from model simulations were utilized by the optimal interpolation algorithm to determine the most likely evolution of the velocity field under constraints provided by Lagrangian observations and their error statistics. The accuracy of the velocity field reconstruction was evaluated at each time step. The results of the fusion of model outputs with surface drifter velocity measurements show a significant improvement (by ∼ 50 %) of the model capability to simulate the drift of passive tracers in the Dover Strait. Optimized velocity fields were used to quantify the absolute dispersion in the study area. The implications of these results are important, as they can be used to improve existing decision-making support tool or design new tools for monitoring the transport and dispersion in a coastal ocean environment.</p

ИССЛЕДОВАНИЯ ОБЪЕКТОВ КУЛЬТУРНОГО НАСЛЕДИЯ ФЕДЕРОЛЬНОГО ЗНАЧЕНИЯ

This article is supposed to make a professional analysis and assess the reliability of the historical buildings in Ryazan - an object of cultural heritage of federal importance “House of Saltykov-Shchedrin (Morozov) - 18th century”. On the basis of visual inspection and a large number of field studies using methods of ground-based laser scanning, photogrammetric method and other measuring instruments, areas of destruction and loss of the building were identified. According to the results of the analysis of archival documents and the processing of field work, a complex of architectural and archaeological measurement drawings was drawn up, on the basis of which further house restoration will be carried out without any damage to historical material. The article on a specific example provides brief archival information about the historical significance of the building, describes the methods and methods of the survey.Se supone que este artículo hace un análisis profesional y evalúa la confiabilidad de los edificios históricos en Ryazan, un objeto del patrimonio cultural de importancia federal "Casa de Saltykov-Shchedrin (Morozov) - Siglo XVIII". Sobre la base de la inspección visual y un gran número de estudios de campo que utilizan métodos de escaneo láser en tierra, el método fotogramétrico y otros instrumentos de medición, se identificaron áreas de destrucción y pérdida del edificio. De acuerdo con los resultados del análisis de documentos de archivo y el procesamiento del trabajo de campo, se diseñó un complejo de planos de mediciones arquitectónicas y arqueológicas, sobre la base de la cual se llevará a cabo una restauración adicional de la casa sin dañar el material histórico. El artículo sobre un ejemplo específico proporciona información breve de archivo sobre el significado histórico del edificio, describe los métodos y los métodos de la encuesta.В данной статье предполагается сделать профессиональный анализ и оценить надежность здания исторической застройки г. Рязани – объект культурного наследия федерального значения «Дом Салтыкова-Щедрина (Морозова)-XVIII в.». На основе визуального обследования и большого количества натурных исследований методами наземного лазерного сканирования, фотограмметрическим методом и другими измерительными приборами было выявлены участки разрушений и утраты здания. По результатам анализа архивных документов и обработки полевых работ стал комплекс архитектурно-археологических обмерных чертежей, на основе которого будет дальнейшая реставрация дома без какого-либо ущерба историческому материалу. В статье на конкретном примере приводятся краткие архивные сведения об исторической значимости здания, описаны методы и способы обследования

Evolution of the cosmic ray anisotropy above 10^{14} eV

The amplitude and phase of the cosmic ray anisotropy are well established experimentally between 10^{11} eV and 10^{14} eV. The study of their evolution into the energy region 10^{14}-10^{16} eV can provide a significant tool for the understanding of the steepening ("knee") of the primary spectrum. In this letter we extend the EAS-TOP measurement performed at E_0 around 10^{14} eV, to higher energies by using the full data set (8 years of data taking). Results derived at about 10^{14} and 4x10^{14} eV are compared and discussed. Hints of increasing amplitude and change of phase above 10^{14} eV are reported. The significance of the observation for the understanding of cosmic ray propagation is discussed.Comment: 4 pages, 3 figures, accepted for publication on ApJ Letter