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Search Results: 1 - 10 of 213 matches for " Curt Flather "
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Forest Wetland Area and the Forest Sector Economy in the U.S. South  [PDF]
Frederick Cubbage, Robert Abt, Ray Sheffield, Curt Flather, James Wickham
Open Journal of Forestry (OJF) , 2018, DOI: 10.4236/ojf.2018.83026
Abstract: This article reviews current data on forest wetlands and their economic contributions in the South, ranging from Texas to Virginia. Based on USDA Forest Service Forest Inventory and Analysis (FIA) data, the wetland category comprised 17.7% of timber land area on all private and public lands in the South. This included 4.25 million ha of hydric sites; 0.77 million ha mesic wet; 9.55 million ha mesic, with only seasonal access; for a total of 14.57 million ha. The Natural Resource Inventory (NRI) for 2012 on private lands estimated that there were 14.71 million ha forested wetlands, which comprised 17.7% of all forested private forest area. The 2015 National Land Cover Data for the South estimated that there were 17.8 million ha of woody wetlands, which comprised 8% to 12% of the southern land area, and there were also 4.45 million ha of emergent herbaceous sites. About 10% of the southern timber forest sector would be based on harvests from wetland forests economy ($455 million per year), while the 17.7% of wetland land area would provide a proportional share of the annual nontimber forest products ($44 million) and payments for ecosystem services ($134 million). Wetlands also provide important nontimber forest products, and ecosystem services, which are beginning to develop active private and public markets.
MIT OpenCourseWare and the Open Educational Resource Movement (video)
Curt Newton
L?ring og Medier , 2009,
Abstract: Afspil video (linket bner i et nyt vindue) Opl g p Forskningsnet konference 2008
Arseni Pacheco i Ransanz (1932-2011) Arseni Pacheco i Ransanz (1932-2011)
Curt Wittlin
Llengua & Literatura , 2012, DOI: 10.2436/l&l.v0i0.60567
Nimuendajú Curt
Mana , 2001,
Nimuendajú Curt
Mana , 2001,
Graph decomposition and quasigroup identities
Curt Lindner
Le Matematiche , 1990,
Abstract: See directly the article.
Dialectal Variation in Norwegian Imperatives
Curt Rice
Nordlyd : Troms? University Working Papers on Language & Linguistics / Institutt for Spr?k og Litteratur, Universitetet i Troms? , 2003,
Abstract: This article discusses the formation of imperatives in Norwegian. It focuses on the cases in which phonological well-formedness requirements interfere with imperative formation. Several attested solutions are presented and receive an optimality theoretic analysis. Some speakers invoke a purely phonological solution, e.g. sonorant devoicing. Others borrow from elsewhere in the paradigm, e.g. taking the infinitive form and using it as the imperative. A third group avoid the constructions altogether, necessitating an analysis in which the null parse is optimal.
Die Rebhühner des Eiximenis: Gott r cht auch Mord an Nicht-Christen. (Zum Gedenken seines sechshundertsten Todestages) [The partridges of Eiximenis: on the occasion of the 600th year of his death]
Wittlin, Curt
Zeitschrift für Katalanistik , 2010,
Abstract: This article gives an overview of the public and academic activities that have been organized in 2009, the 600th year of the death of the famous Valencian preacher and philosopher, and sheds light on the importance of his work.
Angular Resolution of the LISA Gravitational Wave Detector
Curt Cutler
Physics , 1997, DOI: 10.1103/PhysRevD.57.7089
Abstract: We calculate the angular resolution of the planned LISA detector, a space-based laser interferometer for measuring low-frequency gravitational waves from galactic and extragalactic sources. LISA is not a pointed instrument; it is an all-sky monitor with a quadrupolar beam pattern. LISA will measure simultaneously both polarization components of incoming gravitational waves, so the data will consist of two time series. All physical properties of the source, including its position, must be extracted from these time series. LISA's angular resolution is therefore not a fixed quantity, but rather depends on the type of signal and on how much other information must be extracted. Information about the source position will be encoded in the measured signal in three ways: 1) through the relative amplitudes and phases of the two polarization components, 2) through the periodic Doppler shift imposed on the signal by the detector's motion around the Sun, and 3) through the further modulation of the signal caused by the detector's time-varying orientation. We derive the basic formulae required to calculate the LISA's angular resolution $\Delta \Omega_S$ for a given source. We then evaluate $\Delta \Omega_S$ for two sources of particular interest: monchromatic sources and mergers of supermassive black holes. For these two types of sources, we calculate (in the high signal-to-noise approximation) the full variance-covariance matrix, which gives the accuracy to which all source parameters can be measured. Since our results on LISA's angular resolution depend mainly on gross features of the detector geometry, orbit, and noise curve, we expect these results to be fairly insensitive to modest changes in detector design that may occur between now and launch. We also expect that our calculations could be easily modified to apply to a modified design.
Gravitational Waves from Neutron Stars with Large Toroidal B-fields
Curt Cutler
Physics , 2002, DOI: 10.1103/PhysRevD.66.084025
Abstract: We show that NS's with large toroidal B-fields tend naturally to evolve into potent gravitational-wave (gw) emitters. The toroidal field B_t tends to distort the NS into a prolate shape, and this magnetic distortion can easily dominate over the oblateness ``frozen into'' the NS crust. An elastic NS with frozen-in B-field of this magnitude is clearly secularly unstable: the wobble angle between the NS's angular momentum J^i and the star's magnetic axis n_B^i grow on a dissipation timescale until J^i and n_B^i are orthogonal. This final orientation is clearly the optimal one for gravitational-wave (gw) emission. The basic cause of the instability is quite general, so we conjecture that the same final state is reached for a realistic NS. Assuming this, we show that for LMXB's with B_t of order 10^{13}G, the spindown from gw's is sufficient to balance the accretion torque--supporting a suggestion by Bildsten. The spindown rates of most millisecond pulsars can also be attributed to gw emission sourced by toroidal B-fields, and both these sources could be observed by LIGO II. While the first-year spindown of a newborn NS is most likely dominated by em processes, reasonable values of B_t and the (external) dipolar field B_d can lead to detectable levels of gw emission, for a newborn NS in our own galaxy.
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