Objective: Contrast-enhanced carotid ultrasonography (CEUS) is a new technique for assessing carotid artery plaques. The present study attempted to demonstrate the association between the findings of CEUS performed prior to carotid artery stenting (CAS) and plaque debris caught during CAS. Methods: This study was conducted with 16 patients (15 men, 1 woman; mean age: 74.8 years) who had undergo...

We describe the morphology and internal structure of Mullins and Friedman Glaciers, two cold-based, debris-covered alpine glaciers that occur in neighboring valleys in the McMurdo Dry Valleys, Antarctica. Both glaciers are overlain by a single, dry supraglacial debris layer (8–75 cm thick); each mantling debris layer is marked with near-identical patterns of arcuate ridges and steps, as well as...

[1] Debris flows have typically been viewed as two-phase mixtures of sediment and water, but in forested mountain landscapes, wood can represent a sizable fraction of total flow volume. The effects of this third phase on flow behavior are poorly understood. To evaluate whether wood can have a significant effect on debris flow runout in small mountainous watersheds, we used a landscape-scale mod...

Stumps account for a large proportion of coarse woody debris in managed forests, but their decay dynamics are poorly understood. The loss of mass and the degree of humification of the above-ground woody debris, below-ground woody debris, bark and root system (R1, 10 mm ≥ diameter > 0 mm; R2, 25 mm ≥ diameter >10 mm; 100 mm ≥ R3 > 25 mm; R4 > 100 mm) of Masson pine (Pinus massoniana) stump syste...

Debris flow is one of the major threats for the sustainability of environmental and social development. The velocity directly determines the impact on the vulnerability. This study focuses on an approach using radial basis function (RBF) neural network and gravitational search algorithm (GSA) for predicting debris flow velocity. A total of 50 debris flow events were investigated in the Jiangjia...

Check dams are one of the structures used to control debris flows. In this study, in order to evaluate the effect of hydraulic parameters on debris sediment trapping rate by the slit trapezoidal check dams with different angles, and to develop an empirical relation for determination of trapping coefficient of the dam reservoirs, three physical models of the check dams were used. The tests were ...

The outbreak of debris flows in a reservoir region can affect the stability of hydropower stations and threaten the lives of the people living downstream of dams. Therefore, determining the hazard degree of debris flows in a reservoir region is of great importance. SPOT5 remote sensing images and digital elevation models are introduced to determine the characteristics of debris-flow catchments....

Two major satellite breakups, the worst in 20 months, occurred just four weeks apart in the fourth quarter of 2001, both producing in excess of 300 large fragments. Two other lesser breakup events brought the total number of satellite fragmentations to nine for the year, a rate not matched since 1998., experienced a significant fragmentation while in an orbit just 30 km above the International ...

An overview regarding planetary debris disks: First, more history to complement Low and Aumann’s summary appearing elsewhere in this volume. Then, commentary on the nature of debris disks and what we’ve learned from them: properties of the original “Fabulous Four” archetypes, results from surveys showing that a large fraction of ordinary stars may be hosts for debris disks, and relatively detai...