527 research outputs found
Flood of June 9, 1957, at Perry, Florida
Floods occurred on streams in the vicinity of Perry,
Taylor County, Florida, on June 9, 1957, as a result of heavy
rains from atropical disturbance. Serious flooding occurred
in Perry along Spring and Pimple creeks as outlined by the
shaded area in figure 1, requiring the evacuation of about
ZOO families from the lowland area. No loss of life was
reported. The damages to residential and commercial properties
were estimated at several million dollars. Most of
the damage was confined to residential areas (fig. 2); however,
several stores in the area were damaged by flood
waters (fig. 3).
This report presents data pertaining to the rainfall
accompanying this storm and peak flows of Spring and Pimple
creeks in Perry. It contains flood elevations at several
points, and peak discharges of the two creeks flowing through
Perry. The report also contains a discussion of the rainfall
associated with the flood and a description of the general
features of the flood. (PDF contains 16 pages.
Water resource records of the Econfina Creek Basin area, Florida
The Econfina Creek basin area in northwestern Florida, which includes Bay
County, southeastern Washiigton County, and parts of Calhoun, Gulf, and
Jackson counties is shown in figure 1. The basin has an abundant supply of
ground water and surface water of good quality. This determination is based on
a three-year investigation of the water resources of the basin by the U. S.
Geological Survey in cooperation with the Division of Geology, Florida Board of
Conservation, during the period from October 1961 through June 1964. The
purpose of this report is to assemble the basic data collected during this
investigation for those persons interested in water development or management
in this basin.
(Document has 131 pages.
Teachers Bridging the Digital Divide in Rural Schools with 1:1 Computing
This article shares the findings of a mixed method study about the implementation of 1:1 computing in a small rural Florida school district. Researchers used multiple regression analyses to examine whether Davis’ (1989) Technology Acceptance Model helped explain teachers’ adoption of 1:1. The results indicated that the rural teachers’ perceived ease of use and perceived usefulness of 1:1 were significant predictors of both whole class and individualized instructions with 1:1. The qualitative phase of the study explored the ways in which the teachers integrated 1:1 into their instructional practices and what factors motivated them to do so. The analysis showed that the teachers used 1:1 largely to foster digital literacy and collaboration as well as to conduct student assessment. Reasons why the teachers integrated 1:1 into instruction included increasing student engagement, personalizing learning, and facilitating teacher productivity
Interim report on the water resources of Escambia and Santa Rosa counties, Florida
An investigation, currently in progress, deals with
the water resources of Escambia and Santa Rosa counties,
Florida. The mild climate and excellent water supplies are
prime reasons for a trend of industrial development in this
section of Florida. Information on the water resources of
the area prior to this investigation was sketchy and based
on a minimum of documented data. The purpose of this
investigation is to collect water data and combine it with
data previously collected into an interpretative report that
will be beneficial to water users. (Document has 105 pages.
A layering model for superconductivity in the borocarbides
We propose a superlattice model to describe superconductivity in layered
materials, such as the borocarbide families with the chemical formul\ae\
BC and BC, with being (essentially) a rare earth, and a
transition metal. We assume a single band in which electrons feel a local
attractive interaction (negative Hubbard-) on sites representing the B
layers, while U=0 on sites representing the C layers; the multi-band
structure is taken into account minimally through a band offset . The
one-dimensional model is studied numerically through the calculation of the
charge gap, the Drude weight, and of the pairing correlation function. A
comparison with the available information on the nature of the electronic
ground state (metallic or superconducting) indicates that the model provides a
systematic parametrization of the whole borocarbide family.Comment: 4 figure
The s Process: Nuclear Physics, Stellar Models, Observations
Nucleosynthesis in the s process takes place in the He burning layers of low
mass AGB stars and during the He and C burning phases of massive stars. The s
process contributes about half of the element abundances between Cu and Bi in
solar system material. Depending on stellar mass and metallicity the resulting
s-abundance patterns exhibit characteristic features, which provide
comprehensive information for our understanding of the stellar life cycle and
for the chemical evolution of galaxies. The rapidly growing body of detailed
abundance observations, in particular for AGB and post-AGB stars, for objects
in binary systems, and for the very faint metal-poor population represents
exciting challenges and constraints for stellar model calculations. Based on
updated and improved nuclear physics data for the s-process reaction network,
current models are aiming at ab initio solution for the stellar physics related
to convection and mixing processes. Progress in the intimately related areas of
observations, nuclear and atomic physics, and stellar modeling is reviewed and
the corresponding interplay is illustrated by the general abundance patterns of
the elements beyond iron and by the effect of sensitive branching points along
the s-process path. The strong variations of the s-process efficiency with
metallicity bear also interesting consequences for Galactic chemical evolution.Comment: 53 pages, 20 figures, 3 tables; Reviews of Modern Physics, accepte
Clinical and molecular characterization of HER2 amplified-pancreatic cancer
<p>Background:
Pancreatic cancer is one of the most lethal and molecularly diverse malignancies. Repurposing of therapeutics that target specific molecular mechanisms in different disease types offers potential for rapid improvements in outcome. Although HER2 amplification occurs in pancreatic cancer, it is inadequately characterized to exploit the potential of anti-HER2 therapies.</p>
<p>Methods:
HER2 amplification was detected and further analyzed using multiple genomic sequencing approaches. Standardized reference laboratory assays defined HER2 amplification in a large cohort of patients (n = 469) with pancreatic ductal adenocarcinoma (PDAC).</p>
<p>Results:
An amplified inversion event (1 MB) was identified at the HER2 locus in a patient with PDAC. Using standardized laboratory assays, we established diagnostic criteria for HER2 amplification in PDAC, and observed a prevalence of 2%. Clinically, HER2- amplified PDAC was characterized by a lack of liver metastases, and a preponderance of lung and brain metastases. Excluding breast and gastric cancer, the incidence of HER2-amplified cancers in the USA is >22,000 per annum.</p>
<p>Conclusions:
HER2 amplification occurs in 2% of PDAC, and has distinct features with implications for clinical practice. The molecular heterogeneity of PDAC implies that even an incidence of 2% represents an attractive target for anti-HER2 therapies, as options for PDAC are limited. Recruiting patients based on HER2 amplification, rather than organ of origin, could make trials of anti-HER2 therapies feasible in less common cancer types.</p>
EUV spectra of highly-charged ions W-W relevant to ITER diagnostics
We report the first measurements and detailed analysis of extreme ultraviolet
(EUV) spectra (4 nm to 20 nm) of highly-charged tungsten ions W to
W obtained with an electron beam ion trap (EBIT). Collisional-radiative
modelling is used to identify strong electric-dipole and magnetic-dipole
transitions in all ionization stages. These lines can be used for impurity
transport studies and temperature diagnostics in fusion reactors, such as ITER.
Identifications of prominent lines from several W ions were confirmed by
measurement of isoelectronic EUV spectra of Hf, Ta, and Au. We also discuss the
importance of charge exchange recombination for correct description of
ionization balance in the EBIT plasma.Comment: 11 pages, 4 figure
State-resolved valence shell photoionization of Be-like ions: experiment and theory
High-resolution photoionization experiments were carried out using beams of
Be-like C, N, and O ions with roughly equal populations of
the S ground-state and the P manifold of metastable components. The
energy scales of the experiments are calibrated with uncertainties of 1 to 10
meV depending on photon energy. Resolving powers beyond 20,000 were reached
allowing for the separation of contributions from the individual metastable
P, P, and P states. The measured data compare
favourably with semi-relativistic Breit-Pauli R-matrixComment: 23 figures and 3 table
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