Cassane diterpenoids from lonchocarpus laxiflorus

This article examines cassane diterpenoids from lonchocarpus laxiflorus

Conjugate gradient algorithms and the Galerkin boundary element method

Original article can be found at: http://www.sciencedirect.com/science/journal/08981221 Copyright Elsevier Ltd. DOI: 10.1016/j.camwa.2004.02.002Peer reviewe

The Maine Patient Centered Medical Home (PCMH) Pilot: Implementation Evaluation

The purpose of this Maine Patient Centered Medical Home (PCMH) Pilot is to improve quality of care, efficiency, and patient/family satisfaction provided by primary care practices. Its premise is that the resources provided to practices through the Pilot (including enhanced payments, training, consultation, and learning collaborative) will help them transform themselves and reach a higher level of functionality as medical homes, which in turn will lead to improvements in quality of care, efficiency, and patient/family satisfaction. The three-year Pilot was convened by MaineCare, the Maine Quality Forum, and Quality Counts. The participating payers are MaineCare (Maine Medicaid), Aetna, Anthem, and Harvard Pilgrim Health Care. Three aspects of the Pilot are being evaluated by the Muskie School of Public Service: 1) patient’s experiences; 2) the implementation process and interim results during Year 1; and 3) changes in the quality and efficiency of primary care. This report focuses on findings from the implementation evaluation. A national evaluation of a PCMH demonstration concluded that several factors, including practices’ workplace culture and resilience (or “adaptive reserve,” including communication, leadership, learning culture, teamwork and work environment) were major determinants in the degree to which practices could transform themselves into medical homes. The implementation evaluation describes the processes the Pilot practices engaged in during the first year and profiles adaptive reserve and several other factors that may contribute to their success in achieving the Pilot’s objectives. The objectives of the implementation evaluation are to Profile the characteristics of the Pilot practices Describe the practices’ objectives and strategies for implementing the Pilot Describe the implementation process during Year 1 Provide practical guidance to the practices, the Pilot conveners, and MaineCare Develop profiles of the Pilot practices for use in the quality and efficiency evaluation Make recommendations for use by evaluators of other PCMH pilot

From community-based to centralised national management - A wrong turning for the governance of the marine protected area in Apo Island, Philippines?

Before the mid-1990s, Apo Island, Philippines, was often described as one of the world's best examples of community-based marine management. This paper studies the less-documented transition of the island during the late 1990s from community-based management to centralised national state management. Extensive interviewing of islanders has revealed deep misgivings about the centralised regime—the Protected Area Management Board (PAMB). PAMB's aim of implementing the National Integrated Protected Areas Systems (NIPAS) Act was initially looked upon favourably by islanders, but it has lost that support because of its exclusion of stakeholders from management and its poor institutional performance. The paper's conclusion is that the implementation of the NIPAS Act highlights the limitations of top-down management, and that there is a need to restore an element of local stakeholder participation in the governance of Apo's marine protected area (MPA). A system of co-management between community and national state actors is essential to ensure the long-term sustainability of Apo's marine resources

Phase 2, Open-Label, International, Non-Comparative Study of MEDI4736 in Patients with Locally Advanced or Metastatic, Pd-L1 +, Stage 3B–4 Nsclc Who Have Received ≥2 Prior Systemic Treatment Regimens (ATLANTIC)

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Magnetic switching in granular FePt layers promoted by near-field laser enhancement

Light-matter interaction at the nanoscale in magnetic materials is a topic of intense research in view of potential applications in next-generation high-density magnetic recording. Laser-assisted switching provides a pathway for overcoming the material constraints of high-anisotropy and high-packing density media, though much about the dynamics of the switching process remains unexplored. We use ultrafast small-angle x-ray scattering at an x-ray free-electron laser to probe the magnetic switching dynamics of FePt nanoparticles embedded in a carbon matrix following excitation by an optical femtosecond laser pulse. We observe that the combination of laser excitation and applied static magnetic field, one order of magnitude smaller than the coercive field, can overcome the magnetic anisotropy barrier between "up" and "down" magnetization, enabling magnetization switching. This magnetic switching is found to be inhomogeneous throughout the material, with some individual FePt nanoparticles neither switching nor demagnetizing. The origin of this behavior is identified as the near-field modification of the incident laser radiation around FePt nanoparticles. The fraction of not-switching nanoparticles is influenced by the heat flow between FePt and a heat-sink layer

Heterotic Compactification, An Algorithmic Approach

We approach string phenomenology from the perspective of computational algebraic geometry, by providing new and efficient techniques for proving stability and calculating particle spectra in heterotic compactifications. This is done in the context of complete intersection Calabi-Yau manifolds in a single projective space where we classify positive monad bundles. Using a combination of analytic methods and computer algebra we prove stability for all such bundles and compute the complete particle spectrum, including gauge singlets. In particular, we find that the number of anti-generations vanishes for all our bundles and that the spectrum is manifestly moduli-dependent.Comment: 36 pages, Late

Meson screening masses from lattice QCD with two light and the strange quark

We present results for screening masses of mesons built from light and strange quarks in the temperature range of approximately between 140 MeV to 800 MeV. The lattice computations were performed with 2+1 dynamical light and strange flavors of improved (p4) staggered fermions along a line of constant physics defined by a pion mass of about 220 MeV and a kaon mass of 500 MeV. The lattices had temporal extents Nt = 4, 6 and 8 and aspect ratios of Ns / Nt \geq 4. At least up to a temperature of 140 MeV the pseudo-scalar screening mass remains almost equal to the corresponding zero temperature pseudo-scalar (pole) mass. At temperatures around 3Tc (Tc being the transition temperature) the continuum extrapolated pseudo-scalar screening mass approaches very close to the free continuum result of 2 \pi T from below. On the other hand, at high temperatures the vector screening mass turns out to be larger than the free continuum value of 2 \pi T. The pseudo-scalar and the vector screening masses do not become degenerate even for a temperature as high as 4Tc. Using these mesonic spatial correlation functions we have also investigated the restoration of chiral symmetry and the effective restoration of the axial symmetry. We have found that the vector and the axial-vector screening correlators become degenerate, indicating chiral symmetry restoration, at a temperature which is consistent with the QCD transition temperature obtained in previous studies. On the other hand, the pseudo-scalar and the scalar screening correlators become degenerate only at temperatures larger than 1.3Tc, indicating that the effective restoration of the axial symmetry takes place at a temperature larger than the QCD transition temperature.Comment: Published versio

Parameter estimation in spatially extended systems: The Karhunen-Loeve and Galerkin multiple shooting approach

Parameter estimation for spatiotemporal dynamics for coupled map lattices and continuous time domain systems is shown using a combination of multiple shooting, Karhunen-Loeve decomposition and Galerkin's projection methodologies. The resulting advantages in estimating parameters have been studied and discussed for chaotic and turbulent dynamics using small amounts of data from subsystems, availability of only scalar and noisy time series data, effects of space-time parameter variations, and in the presence of multiple time-scales.Comment: 11 pages, 5 figures, 4 Tables Corresponding Author - V. Ravi Kumar, e-mail address: [email protected]

Two-loop scalar self-energies in a general renormalizable theory at leading order in gauge couplings

I present results for the two-loop self-energy functions for scalars in a general renormalizable field theory, using mass-independent renormalization schemes based on dimensional regularization and dimensional reduction. The results are given in terms of a minimal set of loop-integral basis functions, which are readily evaluated numerically by computers. This paper contains the contributions corresponding to the Feynman diagrams with zero or one vector propagator lines. These are the ones needed to obtain the pole masses of the neutral and charged Higgs scalar bosons in supersymmetry, neglecting only the purely electroweak parts at two-loop order. A subsequent paper will present the results for the remaining diagrams, which involve two or more vector lines.Comment: 26 pages, 4 figures, revtex4, axodraw.sty. Version 2: sentence after eq. (A.13) corrected, references added. Version 3: typos in eqs. (5.17), (5.20), (5.21), (5.32) are corrected. Also, the MSbar versions of eqs. (5.32) and (5.33) are now include