176 research outputs found
6-Deoxy-6-fluoro-d-galactose
The crystal structure unequivocally confirms the relative stereochemistry of the title compound, C6H11FO5. The absolute stereochemistry was determined by the use of d-galactose as the starting material. The compound exists as a three-dimensional O—H⋯O hydrogen-bonded network with each molecule acting as a donor and acceptor for four hydrogen bonds
Pauli's Principle in Probe Microscopy
Exceptionally clear images of intramolecular structure can be attained in
dynamic force microscopy through the combination of a passivated tip apex and
operation in what has become known as the "Pauli exclusion regime" of the
tip-sample interaction. We discuss, from an experimentalist's perspective, a
number of aspects of the exclusion principle which underpin this ability to
achieve submolecular resolution. Our particular focus is on the origins,
history, and interpretation of Pauli's principle in the context of interatomic
and intermolecular interactions.Comment: This is a chapter from "Imaging and Manipulation of Adsorbates using
Dynamic Force Microscopy", a book which is part of the "Advances in Atom and
Single Molecule Machines" series published by Springer
[http://www.springer.com/series/10425]. To be published late 201
Footprints- In the Footprints of Squier and Davis: Archeological Fieldwork in Ross County, Ohio
TABLE OF CONTENTS
Acknowledgements....................................................................iList of Tables...................................................................vii List of Figures...................................................................ix Contributors .........................................................................xiii
Chapter 1
In the Footprints of Squier and Davis : Archeological
Fieldwork in Ross County, Ohio
Mark J. Lynott................................................................................1 Previous Studies in Ohio ...................................................1 Hopewell Studies Today ................................................................4 Recent Field Research ..........................................................................6 Goal of this Volume ................................................................................12
Chapter 2
In Non-mound Space at the Hopewell Mound Group
Jennifer Pederson Weinberger .........................................13 Geophysical Survey .......................................................15Western Village Area.....................................................................16 Near the East Village .....................................................................18 Central Area ............................................................................19 Discussion .......................................................................................19
Chapter 3
Field Studies of the Octagon and Great Circle, High Bank Earthworks Ross County, Ohio
N’omi B. Greber and Orrin C. Shane III ..............................................23 Excavations at the Octagon ............................................................25 Geophysics at the Great Circle ............................................................30 Excavations at the Great Circle ..........................................................33 Radiocarbon Assays ...........................................................................41 Comments ....................................................................................44 Addendum ..........................................................................................46
Chapter 4
Spruce Hill Earthworks: The 1995-1996 National Park Service Investigations
Bret J. Ruby .............................................................................................49 Background .......................................................................................49 The Spruce Hill Earthworks .......................................................................49 Spruce Hill Revisited ......................................................................53 The 1995-1996 National Park Service Investigations ............................53 Discussion and Conclusions ..............................................................61
Chapter 5
Falling Through a Crack in the Core: The Surprise and Demise of Anderson Earthwork
William H. Pickard and Jeffrey W. Weinberger ........................................ 67 History and Setting ..................................................................................68 1993 Excavations ..................................................................................70 Discussion ..............................................................................................72 Conclusion ............................................................................................74
Chapter 6
Middle Woodland and Other Settlement Remains in the Overly Tract Near The Hopeton Earthwork, Ross County, Ohio
William S. Dancey .....................................................................................................77 Research Design.............................................................................77 Artifact Categories and their Distributions..............................................80 Discussion............................................................................................92
Chapter 7
Hopewell Occupation at the Hopeton Earthworks: Large Scale Surface Survey Using GPS Technology
Jarrod Burks and Dawn Walter Gagliano................................................97 The Survey Area ................................................................................98 Survey Methodology .............................................................................99 Survey Results ...................................................................................99 The Surface Data: A Siteless Approach .................................................103 Discussion and Conclusion .........................................................................106 Notes ...................................................................................................107
Chapter 8
Hopewellian Centers in Context: Investigations In and Around the Hopeton Earthworks
Bret J. Ruby And Mark J. Lynott .................................................................109 Surface Survey ......................................................................................110 Redwing Site ...........................................................................................111 Comparisons .........................................................................................118 Conclusions ......................................................................................122
Chapter 9
Searching for Hopewell Settlements: The Triangle Site at the Hopeton Earthworks
Mark Lynott ...................................................................................... 125 Field Investigations ............................................................................127 Geophysical Survey ............................................................................128 1998 Season ....................................................................................128 Features, Artifacts and Radiocarbon Dating ........................................130 Animal Remains ...............................................................................137 Plant Remains ................................................................................138 Interpretations ..............................................................................139
Chapter 10
Geophysical Investigations at the Hopeton Earthworks
John Weymouth, Bruce Bevan, and Rinita Dalan ...............................145 The Cesium Gradiometer Survey ...........................................................146 Cesium Gradiometer Results ...................................................................146 Geoscan Instrument Surveys ..............................................................148 Comparison of Cesium Magnetic and Resistance Data ........................148 Small Circles...........................................................................................149 Trench Excavations ...................................................................................149 Discussion ................................................................................................152 Conclusions ......................................................................................157
Chapter 11
Archeological and Geoarcheological Study of the Rectangular Enclosure at the Hopeton Works
Mark J. Lynott and Rolfe D. Mandel ......................................................159 The Study of the Rectangular Earthwork ................................................161 Geophysical Survey ..............................................................................163 Trench Excavations .............................................................................164 Chronology ........................................................................................170 Geoarcheological Analysis of Trench 1 .................................................172 Interpretations ................................................................................174
Chapter 12
Ohio Hopewell Ritual Craft Production
Katherine A. Spielmann ............................................................ 179Raw Material Procurement ....................................................................180 Hopewell Crafting ................................................................................181 Deposition ...........................................................................................186 Conclusions ....................................................................................188
References Cited .....................................................................................................18
High-precision measurements of low-lying isomeric states in In with JYFLTRAP double Penning trap
Neutron-rich In isotopes have been studied utilizing the double
Penning trap mass spectrometer JYFLTRAP at the IGISOL facility. Using the
phase-imaging ion-cyclotron-resonance technique, the isomeric states were
resolved from ground states and their excitation energies measured with high
precision in In. In In, the states were
separated and their masses were measured while the energy difference between
the unresolved and states, whose presence was confirmed by
post-trap decay spectroscopy was determined to be keV. In addition,
the half-life of Cd, s, was extracted.
Experimental results were compared with energy density functionals, density
functional theory and shell-model calculations.Comment: 11 pages, 7 figure
Institutional interactions and economic growth: The joint effects of property rights, veto players and democratic capital
We investigate the possible interaction effects that the extent of property rights protection and separation of powers in a political system have on economic growth. Using analysis of panel data from more than countries over the period 1970-2010 we find that the growth effects of property rights increase when political power is divided among more veto players. When distinguishing between institutional veto players (political institutions) and partisan veto players (fractionalization among political parties), we further find that the growth effects of property rights are driven mainly by checks on the chief executive (in bicameral systems) and primarily found in countries with large stocks of democratic capital
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Robust image analysis with sparse representation on quantized visual features
10.1109/TIP.2012.2219543IEEE Transactions on Image Processing223860-871IIPR
Magnetic properties of the rare-earth intermetallics \u3ci\u3eR\u3c/i\u3eGa\u3csub\u3e2\u3c/sub\u3e
The magnetic susceptibility (χ) of polycrystalline samples of RGa2, R=Ce, Pr, Nd, Gd, Tb, Dy, Ho, and Er, has been measured at low field, from 1.5 K to 300 K. The magnetization of these samples also has been measured up to 80 kOe at low temperatures. Antiferromagnetic behavior was observed for all the samples with Neel temperatures (TN) ranging from about 4.1 K for CeGa2 to about 14.8 K for TbGa2. Curie-Weiss fits to the high-temperature χ (T) data led to effective moments in good agreement with those expected for R3+ ions. The paramagnetic Weiss temperatures cannot be reconciled with the de Gennes theory based on free electron coupling of the R spins via the RKKY interaction. Electrical resistivity of selected polycrystalline samples has been measured, and the effects of spin-disorder scattering observed below TN. CeGa2 shows no evidence of Kondo behavior. Magnetization measurements for the polycrystalline samples show metamagnetic phase transitions when the antiferromagnetic R-R interactions are overcome. Measurements on a HoGa2 single crystal show that the [100] direction is the easy direction. Journal of Applied Physics is copyrighted by The American Institute of Physics
Electronic and magnetic properties of amorphous and crystalline Zr\u3csub\u3e40\u3c/sub\u3eCu\u3csub\u3e60-x\u3c/sub\u3eFe\u3csub\u3ex\u3c/sub\u3e alloys
Electronic states and localized magnetic moments and their interactions were studied in amorphous and crystalline Zr40Cu60-xFex alloys for 0≤x≤12. Electrical resistivity, magnetic susceptibility, and high-field magnetization measurements were performed. In the dilute crystalline alloys Curie-Weiss behavior is seen in the susceptibility and is associated with localized moments (μeff≈3μB) on the iron atoms. At higher iron concentrations ferromagnetism is observed. Curie-Weiss behavior also is seen in the susceptibility of the dilute (0eff≈0.7μB). There is some evidence that the local environment of the Fe atoms is important and may depend sensitively on the quench rate used in making the samples or, perhaps, on room-temperature ageing effects in the samples. The dilute amorphous alloys exhibit a negative dρ/d T from 1.4 to 300 K. This is not to be associated with Kondo spin-flip scattering but it is consistent with several other mechanisms including localized-spin-fluctuation scattering, s-d scattering in a nonmagnetic model, scattering from tunneling states in the amorphous alloy, or quasi-liquidmetal-pseudopotential scattering. A recent theory due to Nagel and Tauc on the nearly-free-electron approach to metallic glass alloys is shown to be consistent with this last idea and also is used to account for other features exhibited by the amorphous Zr-Cu system. In the concentrated (x\u3e6) amorphous alloys, resistance maxima and magnetic hysteresis are seen at low temperatures. For x=12 a random ferromagnetic state develops with T0=30 K, which is some five times smaller than T0 for the corresponding crystalline alloy. The saturation moment in the amorphous alloy is also considerably smaller than in the crystalline case. This behavior is similar to other systems in which the crystalline-to-amorphous transition greatly weakens the magnetism
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