9,822 research outputs found
The Pine Tree Mound Site and the Entrada of the Hernando De Soto Expedition of 1542
The entrada into Texas of the Hernando de Solo expedition in July 1542, which was led by Luis de Moscoso after de Soto\u27s death in June of that year, is relevant to the Pine Tree Mound site (4IHS15) because it appears that the site was occupied at that time, and the entrada likely followed a path that brought it very close to the site. In fact, we hypothesize that the Pine Tree Mound site, along with associated villages nearby, is specifically mentioned in entrada accounts as the province of Nondacao. These may have been the forebears of the Nadaco (Anadarko) Caddo, who apparently lived in this same area through the first quarter of the 19th century before moving west to north-central Texas and then to Indian Territory in Oklahoma. The three components of this hypothesis deal with the age of the site, the route of the entrada, and the persistence of Nadaco settlements in this area long after the time of the entrada, and these are addressed in tum below.
The Pine Tree Mound site is a Middle to Late Caddo period ceremonial and civic center in central Harrison County, Texas. It occupies a broad upland surface between Potters and Starkey creeks, about 7.3 km north of where Potters Creek flows onto the floodplain of the Sabine River. The site is large, covering an area 800 m cast-west by 720 m north-south. Its most conspicuous features are three earthen mounds that stand 0.4 to 2.4 m above the modern land surface. The three mounds are within an area measuring 210 m east-west by 150 m north-south. These mounds are associated with a possible buried mound, at least five areas with off-mound structures, a plaza, and at least one cemetery. Together, these constitute the core of the site, measuring about 360 m both east-west and north-south and covering 27 acres. This core area is owned by The Archaeological Conservancy.
Test excavations in 2004 identified eight possible associated village areas ringing the core on the west, and Prewitt and Associates, Inc., conducted intensive excavations at three of these in 2006-2007 under a contract with the Sabine Mining Company. These excavations uncovered the remains of dozens of houses, as well as outside activity areas, middens, and 27 human burials. Analysis of the wealth of data recovered from the site is ongoing and will not be finished for several years. This article provides a preview of one of the topics that the analysis will address
The George C. Davis Site, Cherokee County, Texas: Spring 1980 Archeological Investigations
The results of archeological investigations in portions of the George C. Davis Site are presented in this report prepared by Ross Fields and J. Peter Thurmond . Stringent contract requirements and the provisions of Texas Antiquities Permit No. 237 dictate that this report be brief and descriptive in nature. Requirements such as inclusion of a detailed site investigation history and environmental data were excluded and extensive excavations were stressed in preference to detailed analyses and comparisons. Field investigations were limited by contract to 20 working days and the analysis/write-up to 10 working days. The governing research design was prepared by the Texas Antiquities Committee staff to reflect agreements between the Committee and the Texas Forest Service. Sighificant findings include the general delineation of extensive, and in places intensive, Archaic and Late Prehistoric occupations. Of primary importance is the lack of an identifiable Alto Focus occupation within the northern portion of the Davis Site. This suggests that the small left bank tributary to Bowles Creek existed during Alto Focus times and served as a natural boundary for the village area during that period of site usage. There are hints that significant variations in the selection and use of lithic resources through time are identifiable. It is indeed ! unfortunate that time limitations precluded pursuit of this line of investigation. Ross and Pete have successfully accomplished a most challenging task under less than ideal conditions. They and their field crew are commended for their outstanding work at the Davis Site
Bell's Theorem from Moore's Theorem
It is shown that the restrictions of what can be inferred from
classically-recorded observational outcomes that are imposed by the no-cloning
theorem, the Kochen-Specker theorem and Bell's theorem also follow from
restrictions on inferences from observations formulated within classical
automata theory. Similarities between the assumptions underlying classical
automata theory and those underlying universally-unitary quantum theory are
discussed.Comment: 12 pages; to appear in Int. J. General System
On Carbon Burning in Super Asymptotic Giant Branch Stars
We explore the detailed and broad properties of carbon burning in Super
Asymptotic Giant Branch (SAGB) stars with 2755 MESA stellar evolution models.
The location of first carbon ignition, quenching location of the carbon burning
flames and flashes, angular frequency of the carbon core, and carbon core mass
are studied as a function of the ZAMS mass, initial rotation rate, and mixing
parameters such as convective overshoot, semiconvection, thermohaline and
angular momentum transport. In general terms, we find these properties of
carbon burning in SAGB models are not a strong function of the initial rotation
profile, but are a sensitive function of the overshoot parameter. We
quasi-analytically derive an approximate ignition density, g cm, to predict the location of first carbon ignition
in models that ignite carbon off-center. We also find that overshoot moves the
ZAMS mass boundaries where off-center carbon ignition occurs at a nearly
uniform rate of / 1.6
. For zero overshoot, =0.0, our models in the ZAMS mass
range 8.9 to 11 show off-center carbon ignition. For
canonical amounts of overshooting, =0.016, the off-center carbon
ignition range shifts to 7.2 to 8.8 . Only systems with
and ZAMS mass 7.2-8.0 show
carbon burning is quenched a significant distance from the center. These
results suggest a careful assessment of overshoot modeling approximations on
claims that carbon burning quenches an appreciable distance from the center of
the carbon core.Comment: Accepted ApJ; 23 pages, 21 figures, 5 table
Properties of Carbon-Oxygen White Dwarfs From Monte Carlo Stellar Models
We investigate properties of carbon-oxygen white dwarfs with respect to the
composite uncertainties in the reaction rates using the stellar evolution
toolkit, Modules for Experiments in Stellar Astrophysics (MESA) and the
probability density functions in the reaction rate library STARLIB. These are
the first Monte Carlo stellar evolution studies that use complete stellar
models. Focusing on 3 M models evolved from the pre main-sequence to
the first thermal pulse, we survey the remnant core mass, composition, and
structure properties as a function of 26 STARLIB reaction rates covering
hydrogen and helium burning using a Principal Component Analysis and Spearman
Rank-Order Correlation. Relative to the arithmetic mean value, we find the
width of the 95\% confidence interval to be
0.019 M for the core mass at the first thermal pulse,
12.50 Myr for the age, 0.013 for the central temperature, 0.060 for the central density,
2.610 for the central electron
fraction, 5.810,
0.392, and 0.392. Uncertainties in the experimental
C(, triple-, and
N( reaction rates dominate these variations. We
also consider a grid of 1 to 6 M models evolved from the pre
main-sequence to the final white dwarf to probe the sensitivity of the
initial-final mass relation to experimental uncertainties in the hydrogen and
helium reaction rates.Comment: Accepted for publication in The Astrophysical Journal; 19 Pages, 23
Figures, 5 Table
Probing Grand Unification Through Neutrino Oscillations, Leptogenesis, and Proton Decay
Evidence in favor of supersymmetric grand unification including that based on
the observed family multiplet-structure, gauge coupling unification, neutrino
oscillations, baryogenesis, and certain intriguing features of quark-lepton
masses and mixings is noted. It is argued that attempts to understand (a) the
tiny neutrino masses (especially Delta m^2 (nu_2 -nu_3)), (b) the baryon
asymmetry of the universe (which seems to need leptogenesis), and (c) the
observed features of fermion masses such as the ratio m_b/m_tau, the smallness
of V_cb and the maximality of theta_{nu_mu-nu_tau}, seem to select out the
route to higher unification based on an effective string-unified G(224) =
SU(2)_L x SU(2)_R x SU(4)^c or SO(10)-symmetry, operative in 4D, as opposed to
other alternatives.
A predictive framework based on an effective SO(10) or G(224) symmetry
possessing supersymmetry is presented that successfully describes the masses
and mixings of all fermions including neutrinos. It also accounts for the
observed baryon asymmetry of the universe by utilizing the process of
leptogenesis, which is natural to this framework. It is argued that a
conservative upper limit on the proton lifetime within this
SO(10)/G(224)-framework, which is so far most successful, is given by (1/3-2) x
10^34 years. This in turn strongly suggests that an improvement in the current
sensitivity by a factor of five to ten (compared to SuperK) ought to reveal
proton decay. Implications of this prediction for the next-generation nucleon
decay and neutrino-detector are noted.Comment: 40 page, 3 figures. Conference proceedings from Erice School (Sept
2002), Neutrino Conference (Stony Brook, 2002), PASCOS Conference (Mumbai,
2003) Version 2: New references and some clarifications adde
Recent Archeological Investigations at the Jewett Mine, East-Central Texas
The Jewett Mine is a ca. 21, 000-acre lignite mine in the post oak savannah of Freestone, Leon, and Limestone counties, Texas. The project area straddles the divide between the Navasota River valley on the west and the Trinity River valley on the east and lies at the western margin of the Caddoan area . Although residential use of the area by the Caddo has not been documented, many sites have yielded small quantities of Caddoan pottery, and it is likely that cultures indigenous to the region were affected by the development of Caddoan culture not far to the east. For reference, the George C. Davis Site (41CE19) lies only 95 km to the east-northeast. In addition to contributing information about the interaction between Caddoan and neighboring groups in the central part of East Texas, the Jewett Mine sites, by virtue of their location in the Eastern Woodlands but outside of the Caddoan area proper, have the potential to shed light on such topics as regional Caddoan settlement systems and the origins of Caddo culture
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