Field-collected 4th-instar Glyptotendipes paripes larvae from a natural lake in central Florida preferred small-sized (< 0.84-1.99-mm-diam) grains of sand to burrow in and make cases in the laboratory. The larvae buried or formed cases within 3 h of introduction into 120-ml paper cups containing 80 ml tap water and 20 g of the small-diameter sand. When placed in sand with grains of different si...

In this paper we analyze by means of numerical simulation the mechanisms and processes of flow in two types of fractured tight gas reservoirs: shale and tight-sand systems. The numerical model includes Darcy’s law as the basic equation of multiphase flow and accurately describes the thermophysical properties of the reservoir fluids, but also incorporates other options that cover the spectrum of...

We provide the first formal foundation of SAND attack trees which are a popular extension of the well-known attack trees. The SAND attack tree formalism increases the expressivity of attack trees by introducing the sequential conjunctive operator SAND. This operator enables the modeling of ordered events. We give a semantics to SAND attack trees by interpreting them as sets of series-parallel g...

We have performed an experimental study on the evolution of sand ripples formed under the action of an oscillatory flow. An annular sand-water cell was used in order to investigate a wide range of parameters. The sand ripples follow an irreversible condensation mechanism from small to large wavelength until a final state is reached. The wavelength and the shape of these stable sand patterns are...

S. Xu, H. Zhu, M. Styner, W. Gao, V. Jewells, D. Shen, and W. Lin Computer Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States, Biostatistics, University of North Carolina at Chapel Hill, United States, Psychiatry, University of North Carolina at Chapel Hill, United States, Radiology, University of North Carolina at Chapel Hill, United States, Neuroradiology, Un...

Background:   To assess the outcome of the remplissage arthroscopic surgical method in patients with anterior shoulder dislocation associated with Hill-Sachs lesion.     Methods:   Ten patients with anterior shoulder dislocations and Hill-Sachs lesions were entered into this study and were operated on by the remplissage arthroscopic surgical method. They were followed up 22 months after surgery...

Instability of liquefaction is one of the major reasons which results in the failure of earth structure such as dam. The present study focuses on the simulation of static liquefaction behavior for granular materials such as sand and sand-silt mixtures. Based on micromechanical analysis of inter-particle behavior, a simple one-scale model is proposed to simulate the stress-strain response of san...

From the *School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, Division of Sports Medicine, Campus Heath Services, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, AliveCor Corporation, San Francisco, California, and xDivision of Cardiology, Cardiac Electrophysiology, University of North Carolina at Chapel Hill, Chapel Hill, Nort...

This study investigates Land Use Cover changes in the Chattogram metropolitan area, second-largest city Bangladesh. Using a questionnaire survey of 150 local inhabitants, explores perceived human-induced causes landslides. time series Landsat images, this also analyzes from 1990 to 2020. The analysis reveals built-up area extended rapidly during 1990–2020. In 1990, total was 82.13 km2, which 30...

the forging model for cold rolling is one of rolling models that is used in rolling calculations. in this model,the final rolling pressure is an average value and it is not an accurate model.also by using this model,the firction hill curves are plotted due to the central point of the rolling bite length while frictional stresses intersect at the neutral point.in this study, a new model based on...