346 research outputs found
Expanding The Automobile Search Incident to Arrest: New York v. Belton
This Note will examine the basis for the holding in Belton, consider the changes in existing search incident to arrest law and the effects that it will have on other areas of the law
Mind the Gap: Redefining Exhaustion and Zeig\u27s Role in the Judicial Construction of Excess Insurance Policies
Mind the Gap: Redefining Exhaustion and Zeig\u27s Role in the Judicial Construction of Excess Insurance Policies
A Technological Analysis of Modified Bone from the Widows Creek Site (1JA305), Alabama
This study examines chronological and spatial changes in the distribution of modified bone attributes. Five hundred sixty-two modified bone specimens were examined from Late Archaic, Early Woodland, and Middle/Late Woodland contexts of the Widows Creek site. Each specimen was examined for raw material, manufacturing traces, manufacturing stage, and morphology. The Widows Creek material was then compared to material from Russell Cave (1JA181) and Westmoreland-Barber (40MI11) using published data.
The study found that, at a general level, raw material choice varied little through time. However, distinct differences in the distribution of materials in manufacturing stages and morphological categories are present. Manufacturing stage data shows an increase in the manufacture of certain items including fishhooks and bipointed objects in the Middle Late Woodland period. Differences in settlement pattern and site function are observed when the three sites are compared
Equivalence of foliar water uptake and stomatal conductance?
Foliar water uptake, FWU, the uptake of atmospheric water directly into leaves, has been reported to occur in nearly 200 species spanning a wide range of ecosystems distributed globally. In order to represent FWU in land‐surface models, a conductance term is required to scale the process to the canopy level. Here we show that conductance to FWU is theoretically equivalent to stomatal conductance and that under commonly occurring conditions vapour could diffuse into leaves at rates equivalent to those reported as FWU. We therefore conclude that such 'reverse transpiration' could partially, or even wholly, account for FWU in some plants.Australian Research Council, Grant/Award Number: FT11010045
The persistence of pancakes and the revival of self-gravity in tidal disruption events
The destruction of a star by the tides of a supermassive black hole (SMBH)
powers a bright accretion flare, and the theoretical modeling of such tidal
disruption events (TDEs) can provide a direct means of inferring SMBH
properties from observations. Previously it has been shown that TDEs with
, where is the tidal disruption
radius and is the pericenter distance of the star, form an in-plane
caustic, or ``pancake,'' where the tidally disrupted debris is compressed into
a one-dimensional line within the orbital plane of the star. Here we show that
this result applies generally to all TDEs for which the star is fully
disrupted, i.e., that satisfy . We show that the location of
this caustic is always outside of the tidal disruption radius of the star and
the compression of the gas near the caustic is at most mildly supersonic, which
results in an adiabatic increase in the gas density above the tidal density of
the black hole. As such, this in-plane pancake revitalizes the influence of
self-gravity even for large , in agreement with recent simulations. This
finding suggests that for all TDEs in which the star is fully disrupted,
self-gravity is revived post-pericenter, keeps the stream of debris narrowly
confined in its transverse directions, and renders the debris prone to
gravitational instability.Comment: ApJL Accepte
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