3,448 research outputs found
Cultivating Lifelong Donors: Stewardship and the Fundraising Pyramid
This handbook helps nonprofits build long-term giving programs that span the entire supporter lifecycle, from engagement through the end of life. It highlights strategies for engaging new supporters online, investigates the characteristics of loyal donors, examines the importance of developing personal relationships with transitional giving prospects, and discusses donor cultivation
Summary of Byars v. State, 130 Nev. Adv. Op. 85
The Court determined that (1) pursuant to Missouri v. McNeely[1], the natural dissipation of marijuana in the blood stream does not constitute a per se exigent circumstance permitting a warrantless blood draw, (2) NRS 484C.160(7)[2], which allows officers to use force to obtain blood samples, violates the Fourth Amendment of the United States Constitution[3], and (3) when a warrantless blood draw is nonetheless taken in good faith, evidence obtained from the blood draw is admissible at trial
Summary of JED Prop. v. Coastline RE Holdings NV Corp., 131 Nev. Adv. Op. 11
The Court determined that NRS 107.082(2) does not require a trustee to give notice of a sale pursuant to NRS 107.080 that has been postponed by oral proclamation three times “unless, after the third oral postponement has been given, the sale\u27s date, time, or place is later changed.
Dilute and dense axion stars
Axion stars are hypothetical objects formed of axions, obtained as localized
and coherently oscillating solutions to their classical equation of motion.
Depending on the value of the field amplitude at the core , the equilibrium of the system arises from the balance of the
kinetic pressure and either self-gravity or axion self-interactions. Starting
from a general relativistic framework, we obtain the set of equations
describing the configuration of the axion star, which we solve as a function of
. For small , we reproduce results
previously obtained in the literature, and we provide arguments for the
stability of such configurations in terms of first principles. We compare
qualitative analytical results with a numerical calculation. For large
amplitudes , the axion field probes the full non-harmonic
QCD chiral potential and the axion star enters the {\it dense} branch. Our
numerical solutions show that in this latter regime the axions are
relativistic, and that one should not use a single frequency approximation, as
previously applied in the literature. We employ a multi-harmonic expansion to
solve the relativistic equation for the axion field in the star, and
demonstrate that higher modes cannot be neglected in the dense regime. We
interpret the solutions in the dense regime as pseudo-breathers, and show that
the life-time of such configurations is much smaller than any cosmological time
scale.Comment: 11 pages, 4 figures. v2: added references, matches published versio
Relationships Between Cure Kinetics, Network Architecture, and Fluid Sensitivity in Glassy Epoxies
Relationships between chemical structure, cure kinetics, network morphology and free volume have been correlated with fluid ingress for glassy epoxy network blends. Polymers synthesized from diglycidyl ether of bisphenol-A (DGEBA) and diglycidyl ether of bisphenol-F (DGEBF) were blended with varying amounts of triglycidyl-m-aminophenol (TGAP), tetraglycidyl-4,4-diaminodiphenylmethane (TGMP), napthylamine (NA), adamantylamine (AA), and aminopropylisobutyl polyhedral oliogmericsilsesquioxane (AI-POSS) and cured with 3,3’- and 4,4’- diaminodiphenylsulfone (DDS) to control fractional free volume, average hole size and morphology.
Varying curing profiles introduced morphological changes resulting in differences in network architectures. Epoxy with 10% NA had a smaller Vh (71 Å3) than with 10% AA (74 Å3); the decrease was due to pi-pi stacking and growth kinetics of the 10% NA network. Architecture was a key determinant of moisture and solvent ingress in blends and off-stoichiometry epoxies. Hole size decreased with increasing crosslink density, from 75 Å3 (DGEBA-33DDS) to 48 Å3 (m-TGAP-33DDS). Fractional free volume increased with increasing crosslink density. Equilibrium water uptake increased with FFV, from 2.9% to 7.3% (DGEBA-33DDS and m-TGAP, respectively). Solvent uptake was almost completely inhibited in the epoxy blends when the Vh of the epoxies decreased below the size of the solvent molecule.
In networks formulated with excess epoxy, the importance of chain packing on solvent ingress was clarified. The excess-epoxy networks had lower crosslink densities than the on-stoichiometry benchmarks; however, they exhibited lower hole sizes. Equilibrium water uptake decreased from 2.9% to 2.0% and MEK uptake rate decreased from 3.3 x 10-3 to 2.1 x 10-3 weight percent h-1 between DGEBA-33DDS and DGEBAXS- 33DDS. The improved resistance to fluid was attributed to improved packing by the longer chain segments in the off-stoichiometry networks.
Dispersion of pendant POSS was improved by pre-reacting amine-functionalized POSS with an excess of epoxy. In later experiments, using an improved POSS prereaction product, two separate morphologies were identified for unmodified and prereacted POSS at loading levels of 0-2.5 weight percent. Unmodified POSS exhibited crystallites in a neat epoxy matrix, whereas pre-reacted POSS exhibited a weakly crystalline POSS-rich phase and an epoxy-rich phase. Fluid ingress in the epoxies was not affected by POSS loading
Geological, mineralogical, and geochemical studies of the Paleoproterozoic base metal Stollberg ore field, Bergslagen, Sweden
The Stollberg ore field (~12 Mt) occurs in the Bergslagen region of south-central Sweden, a polydeformed ca. 1.9 Ga igneous province dominated by bimodal felsic and mafic rocks. Sulfide mineralization is hosted by metavolcanic rocks, marble, and skarn, and consists of massive to semi-massive polymetallic sulfides and iron oxide in a semi-regional F2 syncline termed the “Stollberg syncline.” The dominant country rocks are rhyolitic pumice breccia and rhyolitic ash-siltstone with minor mafic sills metamorphosed to the amphibolite facies. On the eastern limb of the Stollberg syncline, sulfide mineralization occurs as stratabound replacement of marble/skarn that grades into iron formation spatially related to metamorphosed, hydrothermally altered rocks dominated by garnet-biotite and gedrite-albite. Although silicified rocks are generally subordinate in the Stollberg ore field, sulfides at Gränsgruvan, on the western limb of the syncline, are located in a silicified zone along with metamorphosed, altered rocks dominated by sericite and quartz-garnet-pyroxene. Although the Tvistbo and Norrgruvan prospects along the northern end of the syncline are small, they show geological characteristics that are transitional to deposits found on the western and eastern limbs of the syncline. Ore at Tvistbo is hosted by skarn and is also spatially associated with quartz-garnet-pyroxene rocks, whereas sulfides at Norrgruvan are hosted by quartz-fluorite altered rocks that are similar to those hosting the Brusgruvan deposit on the eastern limb of the syncline.
Whole-rock analyses of variably altered host rocks in the Stollberg ore field suggest that most components were derived from felsic volcaniclastic rocks and that Zr, Ti, Al, Hf, Nb, Sc, Th, Ga, U, and rare-earth elements (REEs) were immobile during alteration. These rocks (including altered rocks in the stratigraphic footwall) are light REE enriched, heavy REE depleted, and show negative Eu anomalies, whereas sulfide-bearing rocks (Fe- and base metal-rich) and altered rocks in the ore zone show the same REE pattern but with positive Eu anomalies.
Indicators of proximity to sulfides in altered rocks in the Stollberg ore field include positive Eu anomalies, an increase in the concentration of Pb, Sb, As, Tl, Ba, Ba/Sr and K2O, as well as an increase in a modified version of the Ishikawa alteration index, which accounts for the presence of primary Ca in an original limestone component. In addition, garnets enriched in either Ca or Mn as well as principal component analyses of magnetite in sulfide mineralization are also considered to be pathfinders to ore.
Magnetite occurs in sulfides, skarn, amphibolite, and altered metamorphosed rhyolitic ash-siltstone that consists of garnet-biotite, quartz-garnet-pyroxene, gedrite-albite, and sericitic rocks. Magnetite was derived from hydrothermal fluids (~250˚ – 400˚ C) that replaced limestone and rhyolitic ash-siltstone, and subsequently recrystallized during metamorphism. Utilization of discrimination plots (Ca+Al+Mn vs. Ti+V, Ni/(Cr+Mn) vs. Ti+V, Al/(Zn+Ca) vs. Cu/(Si+Ca)) and spider diagrams (median concentration of Mg, Al, Ti, V, Co, Mn, Zn and Ga) suggest that magnetite compositions in sulfides from the Stollberg ore field more closely resemble those from skarns found elsewhere rather than from metamorphosed volcanogenic massive sulfide deposits. Although spider diagrams show that magnetite compositions from various rocks types have similar patterns, suggesting that its formation was associated with a high water to rock ratio, principal component analyses indicate that the composition of magnetite from the same rock type in different sulfide deposits can be distinguished. This suggests that bulk rock composition also has a strong influence on magnetite chemistry
Sustainable Collaborations: Libraries Link Dual-credit Programs to P-20 Initiatives
This article argues for collaboration among academic libraries, academic departments, and high schools in order to strengthen articulation between the secondary and post-secondary sectors. It features work from a year-long project made possible by an LSTA grant and involving the Colorado State UniversityPueblo Library, the English Composition Program, and several southern Colorado high schools that participate in the University’s dual-credit program titled “Senior-to-Sophomore.” This article outlines the process of using information literacy (IL) instruction to foster relationships among secondary and postsecondary instructors, improve communication between instructors and library staff within both sectors, and ultimately strengthen teaching and learning. Major challenges to an ongoing successful partnership include resources and program sustainability. The ultimate benefit, however, is the cross-institutional partnerships focused on IL instruction that benefit not only secondary to post-secondary articulation, but also the entire pre-school through graduate level (P-20) educational continuum
New Chair Alliance
The New Chair Alliance is the conference’s special programming for newly appointed chairpersons. Those who will soon transition into a chair position or who have been a chair for two years or less will find this workshop particularly valuable. Topics covered include transitioning to new roles and responsibilities, annual planning, everyday management, strategic planning for the future, personal development, and finding satisfaction in being a chair and making a difference. Participants will gain practical tips and tools to improve effectiveness, become familiar with essential resources, learn how to identify an administrative mentor, as well as connect and network with others at a similar career stage
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