Superradiance of charged black holes in Einstein–Gauss–Bonnet gravity

Science.gov (United States)

Fierro, Octavio; Grandi, Nicolás; Oliva, Julio

2018-05-01

In this paper we show that electrically charged black holes in Einstein–Gauss–Bonnet gravity suffer from a superradiant instability. It is triggered by a charged scalar field that fulfils Dirichlet boundary conditions at a mirror located outside the horizon. As in general relativity, the unstable modes exist provided that the mirror is located beyond a critical radius, making the instability a long wavelength one. We explore the effects of the Gauss–Bonnet corrections on the critical radius and find evidence that the critical radius decreases as the Gauss–Bonnet coupling α increases. Due to the, up to date, lack of an analytic rotating solution for Einstein–Gauss–Bonnet theory, this is the first example of a superradiant instability in the presence of higher curvature terms in the action.

Noncommutative geometry inspired Einstein–Gauss–Bonnet black holes

Science.gov (United States)

Ghosh, Sushant G.

2018-04-01

Low energy limits of a string theory suggests that the gravity action should include quadratic and higher-order curvature terms, in the form of dimensionally continued Gauss–Bonnet densities. Einstein–Gauss–Bonnet is a natural extension of the general relativity to higher dimensions in which the first and second-order terms correspond, respectively, to general relativity and Einstein–Gauss–Bonnet gravity. We obtain five-dimensional (5D) black hole solutions, inspired by a noncommutative geometry, with a static spherically symmetric, Gaussian mass distribution as a source both in the general relativity and Einstein–Gauss–Bonnet gravity cases, and we also analyzes their thermodynamical properties. Owing the noncommutative corrected black hole, the thermodynamic quantities have also been modified, and phase transition is shown to be achievable. The phase transitions for the thermodynamic stability, in both the theories, are characterized by a discontinuity in the specific heat at r_+=rC , with the stable (unstable) branch for r ) rC . The metric of the noncommutative inspired black holes smoothly goes over to the Boulware–Deser solution at large distance. The paper has been appended with a calculation of black hole mass using holographic renormalization.

77 FR 29929 - Safety Zone; Town of Cape Charles Fireworks, Cape Charles Harbor, Cape Charles, VA

Science.gov (United States)

2012-05-21

... section of this notice. Basis and Purpose On July 4, 2012 the Town of Cape Charles will sponsor a...-AA00 Safety Zone; Town of Cape Charles Fireworks, Cape Charles Harbor, Cape Charles, VA AGENCY: Coast... temporary safety zone on the waters of Cape Charles City Harbor in Cape Charles, VA in support of the Fourth...

Gravitational perfect fluid collapse in Gauss-Bonnet gravity

Energy Technology Data Exchange (ETDEWEB)

Abbas, G.; Tahir, M. [The Islamia University of Bahawalpur, Department of Mathematics, Bahawalpur (Pakistan)

2017-08-15

The Einstein Gauss-Bonnet theory of gravity is the low-energy limit of heterotic super-symmetric string theory. This paper deals with gravitational collapse of a perfect fluid in Einstein-Gauss-Bonnet gravity by considering the Lemaitre-Tolman-Bondi metric. For this purpose, the closed form of the exact solution of the equations of motion has been determined by using the conservation of the stress-energy tensor and the condition of marginally bound shells. It has been investigated that the presence of a Gauss-Bonnet coupling term α > 0 and the pressure of the fluid modifies the structure and time formation of singularity. In this analysis a singularity forms earlier than a horizon, so the end state of the collapse is a naked singularity depending on the initial data. But this singularity is weak and timelike, which goes against the investigation of general relativity. (orig.)

Entanglement temperature with Gauss–Bonnet term

Directory of Open Access Journals (Sweden)

Shesansu Sekhar Pal

2015-09-01

Full Text Available We compute the entanglement temperature using the first law-like of thermodynamics, ΔE=TentΔSEE, up to Gauss–Bonnet term in the Jacobson–Myers entropy functional in any arbitrary spacetime dimension. The computation is done when the entangling region is the geometry of a slab. We also show that such a Gauss–Bonnet term, which becomes a total derivative, when the co-dimension two hypersurface is four dimensional, does not contribute to the finite term in the entanglement entropy. We observe that the Weyl-squared term does not contribute to the entanglement entropy. It is important to note that the calculations are performed when the entangling region is very small and the energy is calculated using the normal Hamiltonian.

Gravity in the Einstein-Gauss-Bonnet theory with the Randall-Sundrum background

International Nuclear Information System (INIS)

Kim, Jihn E.; Lee, Hyun Min

2001-01-01

We obtain the full 5D graviton propagator in the Randall-Sundrum model with the Gauss-Bonnet interaction. From the decomposition of the graviton propagator on the brane, we show that localization of gravity arises in the presence of the Gauss-Bonnet term. We also obtain the metric perturbation for observers on the brane with considering the brane bending and compute the amplitude of one massless graviton exchange. For the positive definite amplitude or no ghost states, the sign of the Gauss-Bonnet term should be negative in our convention, which is compatible with string amplitude computations. In that case, the ghost-free condition is sufficient for obtaining the Newtonian gravity. For a vanishing Gauss-Bonnet coefficient, the brane bending allows us to reproduce the correct graviton polarizations for the effective 4D Einstein gravity

Holographic vector superconductor in Gauss–Bonnet gravity

Directory of Open Access Journals (Sweden)

Jun-Wang Lu

2016-02-01

Full Text Available In the probe limit, we numerically study the holographic p-wave superconductor phase transitions in the higher curvature theory. Concretely, we study the influences of Gauss–Bonnet parameter α on the Maxwell complex vector model (MCV in the five-dimensional Gauss–Bonnet–AdS black hole and soliton backgrounds, respectively. In the two backgrounds, the improving Gauss–Bonnet parameter α and dimension of the vector operator Δ inhibit the vector condensate. In the black hole, the condensate quickly saturates a stable value at lower temperature. Moreover, both the stable value of condensate and the ratio ωg/Tc increase with α. In the soliton, the location of the second pole of the imaginary part increases with α, which implies that the energy of the quasiparticle excitation increases with the improving higher curvature correction. In addition, the influences of the Gauss–Bonnet correction on the MCV model are similar to the ones on the SU(2 p-wave model, which confirms that the MCV model is a generalization of the SU(2 Yang–Mills model even without the applied magnetic field to some extent.

Ocular surface sensitivity repeatability with Cochet-Bonnet esthesiometer.

Science.gov (United States)

Chao, Cecilia; Stapleton, Fiona; Badarudin, Ezailina; Golebiowski, Blanka

2015-02-01

To determine the repeatability of ocular surface threshold measurements using the Cochet-Bonnet esthesiometer on the same day and 3 months apart. Two separate studies were conducted to determine the repeatability of ocular surface threshold measurements made on the same day (n = 20 subjects) and 3 months apart (n = 29 subjects). The Cochet-Bonnet esthesiometer was used to measure corneal and inferior conjunctival thresholds using the ascending method of limits. The pressure exerted by the Cochet-Bonnet esthesiometer was determined using an analytical balance, for both the 0.08- and 0.12-mm-diameter filaments. This calibration was then used to convert filament length measurements to pressure. Repeatability was determined using a Bland and Altman analysis. The pressure exerted at each filament length differed between the two filament diameters. The measured pressure also differed from values provided by the manufacturer. Repeatability of threshold measurements at the central cornea was shown to be good, with better repeatability for same-day measurements (coefficient of repeatability [CoR] = ±0.23 g/mm²) than for those 3 months apart (CoR = ±0.52 g/mm²). Threshold measurements at the inferior conjunctiva, in contrast, were poorly repeatable (CoR = ±12.78 g/mm²). Cochet-Bonnet esthesiometry is repeatable when performed on the central cornea on the same day and 3 months apart, but this instrument is not recommended for conjunctival threshold measurements.

Noether symmetries in Gauss-Bonnet-teleparallel cosmology.

Science.gov (United States)

Capozziello, Salvatore; De Laurentis, Mariafelicia; Dialektopoulos, Konstantinos F

2016-01-01

A generalized teleparallel cosmological model, [Formula: see text], containing the torsion scalar T and the teleparallel counterpart of the Gauss-Bonnet topological invariant [Formula: see text], is studied in the framework of the Noether symmetry approach. As [Formula: see text] gravity, where [Formula: see text] is the Gauss-Bonnet topological invariant and R is the Ricci curvature scalar, exhausts all the curvature information that one can construct from the Riemann tensor, in the same way, [Formula: see text] contains all the possible information directly related to the torsion tensor. In this paper, we discuss how the Noether symmetry approach allows one to fix the form of the function [Formula: see text] and to derive exact cosmological solutions.

Boundary causality versus hyperbolicity for spherical black holes in Gauss–Bonnet gravity

International Nuclear Information System (INIS)

Andrade, Tomás; Cáceres, Elena; Keeler, Cynthia

2017-01-01

We explore the constraints boundary causality places on the allowable Gauss–Bonnet gravitational couplings in asymptotically AdS spaces, specifically considering spherical black hole solutions. We additionally consider the hyperbolicity properties of these solutions, positing that hyperbolicity-violating solutions are sick solutions whose causality properties provide no information about the theory they reside in. For both signs of the Gauss–Bonnet coupling, spherical black holes violate boundary causality at smaller absolute values of the coupling than planar black holes do. For negative coupling, as we tune the Gauss–Bonnet coupling away from zero, both spherical and planar black holes violate hyperbolicity before they violate boundary causality. For positive coupling, the only hyperbolicity-respecting spherical black holes which violate boundary causality do not do so appreciably far from the planar bound. Consequently, eliminating hyperbolicity-violating solutions means the bound on Gauss–Bonnet couplings from the boundary causality of spherical black holes is no tighter than that from planar black holes. (paper)

P-T phase diagram of a holographic s+p model from Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Nie, Zhang-Yu; Zeng, Hui

2015-01-01

In this paper, we study the holographic s+p model in 5-dimensional bulk gravity with the Gauss-Bonnet term. We work in the probe limit and give the Δ-T phase diagrams at three different values of the Gauss-Bonnet coefficient to show the effect of the Gauss-Bonnet term. We also construct the P-T phase diagrams for the holographic system using two different definitions of the pressure and compare the results.

Noether symmetries in Gauss-Bonnet-teleparallel cosmology

Energy Technology Data Exchange (ETDEWEB)

Capozziello, Salvatore [Universita' di Napoli' ' Federico II' ' , Complesso Universitario di Monte S. Angelo, Dipartimento di Fisica ' ' E. Pancini' ' , Napoli (Italy); INFN Sezione di Napoli, Complesso Universitario di Monte S. Angelo, Napoli (Italy); Gran Sasso Science Institute (INFN), L' Aquila (Italy); Tomsk State Pedagogical University, Tomsk (Russian Federation); De Laurentis, Mariafelicia [INFN Sezione di Napoli, Complesso Universitario di Monte S. Angelo, Napoli (Italy); Tomsk State Pedagogical University, Tomsk (Russian Federation); Goethe University, Institute for Theoretical Physics, Frankfurt (Germany); Laboratory of Theoretical Cosmology, Tomsk State University of Control Systems and Radioelectronics (TUSUR), Tomsk (Russian Federation); Dialektopoulos, Konstantinos F. [Universita' di Napoli' ' Federico II' ' , Complesso Universitario di Monte S. Angelo, Dipartimento di Fisica ' ' E. Pancini' ' , Napoli (Italy); INFN Sezione di Napoli, Complesso Universitario di Monte S. Angelo, Napoli (Italy)

2016-11-15

A generalized teleparallel cosmological model, f(T{sub G},T), containing the torsion scalar T and the teleparallel counterpart of the Gauss-Bonnet topological invariant T{sub G}, is studied in the framework of the Noether symmetry approach. As f(G, R) gravity, where G is the Gauss-Bonnet topological invariant and R is the Ricci curvature scalar, exhausts all the curvature information that one can construct from the Riemann tensor, in the same way, f(T{sub G},T) contains all the possible information directly related to the torsion tensor. In this paper, we discuss how the Noether symmetry approach allows one to fix the form of the function f(T{sub G},T) and to derive exact cosmological solutions. (orig.)

Resurgence and hydrodynamic attractors in Gauss-Bonnet holography

Science.gov (United States)

Casalderrey-Solana, Jorge; Gushterov, Nikola I.; Meiring, Ben

2018-04-01

We study the convergence of the hydrodynamic series in the gravity dual of Gauss-Bonnet gravity in five dimensions with negative cosmological constant via holography. By imposing boost invariance symmetry, we find a solution to the Gauss-Bonnet equation of motion in inverse powers of the proper time, from which we can extract high order corrections to Bjorken flow for different values of the Gauss-Bonnet parameter λGB. As in all other known examples the gradient expansion is, at most, an asymptotic series which can be understood through applying the techniques of Borel-Padé summation. As expected from the behaviour of the quasi-normal modes in the theory, we observe that the singularities in the Borel plane of this series show qualitative features that interpolate between the infinitely strong coupling limit of N=4 Super Yang Mills theory and the expectation from kinetic theory. We further perform the Borel resummation to constrain the behaviour of hydrodynamic attractors beyond leading order in the hydrodynamic expansion. We find that for all values of λGB considered, the convergence of different initial conditions to the resummation and its hydrodynamization occur at large and comparable values of the pressure anisotropy.

Holographic p-wave superfluid in Gauss–Bonnet gravity

International Nuclear Information System (INIS)

Liu, Shancheng; Pan, Qiyuan; Jing, Jiliang

2017-01-01

We construct the holographic p-wave superfluid in Gauss–Bonnet gravity via a Maxwell complex vector field model and investigate the effect of the curvature correction on the superfluid phase transition in the probe limit. We obtain the rich phase structure and find that the higher curvature correction hinders the condensate of the vector field but makes it easier for the appearance of translating point from the second-order transition to the first-order one or for the emergence of the Cave of Winds. Moreover, for the supercurrents versus the superfluid velocity, we observe that our results near the critical temperature are independent of the Gauss–Bonnet parameter and agree well with the Ginzburg–Landau prediction.

Holographic p-wave superfluid in Gauss–Bonnet gravity

Energy Technology Data Exchange (ETDEWEB)

Liu, Shancheng [Department of Physics, Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha, Hunan 410081 (China); Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha, Hunan 410081 (China); Pan, Qiyuan, E-mail: panqiyuan@126.com [Department of Physics, Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha, Hunan 410081 (China); Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha, Hunan 410081 (China); Jing, Jiliang, E-mail: jljing@hunnu.edu.cn [Department of Physics, Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha, Hunan 410081 (China); Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha, Hunan 410081 (China)

2017-02-10

We construct the holographic p-wave superfluid in Gauss–Bonnet gravity via a Maxwell complex vector field model and investigate the effect of the curvature correction on the superfluid phase transition in the probe limit. We obtain the rich phase structure and find that the higher curvature correction hinders the condensate of the vector field but makes it easier for the appearance of translating point from the second-order transition to the first-order one or for the emergence of the Cave of Winds. Moreover, for the supercurrents versus the superfluid velocity, we observe that our results near the critical temperature are independent of the Gauss–Bonnet parameter and agree well with the Ginzburg–Landau prediction.

Charles River

Science.gov (United States)

Information on the efforts of the US EPA, the Commonwealth of Massachusetts, the municipalities within the Charles River Watershed and nongovernmental organizations to improve the water quality of the Charles River.

Rotating black holes in dilatonic Einstein-Gauss-Bonnet theory.

Science.gov (United States)

Kleihaus, Burkhard; Kunz, Jutta; Radu, Eugen

2011-04-15

We construct generalizations of the Kerr black holes by including higher-curvature corrections in the form of the Gauss-Bonnet density coupled to the dilaton. We show that the domain of existence of these Einstein-Gauss-Bonnet-dilaton (EGBD) black holes is bounded by the Kerr black holes, the critical EGBD black holes, and the singular extremal EGBD solutions. The angular momentum of the EGBD black holes can exceed the Kerr bound. The EGBD black holes satisfy a generalized Smarr relation. We also compare their innermost stable circular orbits with those of the Kerr black holes and show the existence of differences which might be observable in astrophysical systems.

Charles Babbage

Indian Academy of Sciences (India)

Home; Journals; Resonance – Journal of Science Education. Charles Babbage. Articles written in Resonance – Journal of Science Education. Volume 7 Issue 6 June 2002 pp 88-93 Classics. Of the Analytical Engine · Charles Babbage · More Details Fulltext PDF ...

Note on inflation with a tachyon rolling on the Gauss-Bonnet brane

International Nuclear Information System (INIS)

Paul, B.C.; Sami, M.

2004-01-01

In this paper we study the tachyonic inflation in brane world cosmology with Gauss-Bonnet term in the bulk. We obtain the exact solution of slow roll equations in case of exponential potential. We attempt to implement the proposal of J. E. Lidsey and N. J. Nunes [Phys. Rev. D 67, 103510 (2003)] for the tachyon condensate rolling on the Gauss-Bonnet brane and discuss the difficulties associated with the proposal

Eikonal instability of Gauss-Bonnet-(anti-)-de Sitter black holes

Science.gov (United States)

Konoplya, R. A.; Zhidenko, A.

2017-05-01

Here we have shown that asymptotically anti-de Sitter (AdS) black holes in the Einstein-Gauss-Bonnet (GB) theory are unstable under linear perturbations of space-time in some region of parameters. This (eikonal) instability develops at high multipole numbers. We found the exact parametric regions of the eikonal instability and extended this consideration to asymptotically flat and de Sitter cases. The approach to the threshold of instability is driven by purely imaginary quasinormal modes, which are similar to those found recently in Grozdanov, Kaplis, and Starinets, [J. High Energy Phys. 07 (2016) 151, 10.1007/JHEP07(2016)151] for the higher curvature corrected black hole with the planar horizon. The found instability may indicate limits of holographic applicability of the GB-AdS backgrounds. Recently, through the analysis of critical behavior in AdS space-time in the presence of the Gauss-Bonnet term, it was shown [Deppe et al, Phys. Rev. Lett. 114, 071102 (2015), 10.1103/PhysRevLett.114.071102], that, if the total energy content of the AdS space-time is small, then no black holes can be formed with mass less than some critical value. A similar mass gap was also found when considering collapse of mass shells in asymptotically flat Gauss-Bonnet theories [Frolov, Phys. Rev. Lett. 115, 051102 (2015), 10.1103/PhysRevLett.115.051102]. The found instability of all sufficiently small Einstein-Gauss-Bonnet-AdS, dS and asymptotically flat black holes may explain the existing mass gaps in their formation.

The Gauss-Bonnet identity in quartic gravitation theories

International Nuclear Information System (INIS)

Gomes, M.

1989-01-01

The possible modifications in Gauss-Bonnet relation due to quantum oscillations are studied. The introduction of quantum operator correspondent in the function of two points, in space without singularities is calculated. (M.C.K.)

The second law in four-dimensional Einstein–Gauss–Bonnet gravity

International Nuclear Information System (INIS)

Chatterjee, Saugata; Parikh, Maulik

2014-01-01

The topological contribution of a Gauss–Bonnet term in four dimensions to black hole entropy opens up the possibility of a violation of the second law of thermodynamics in black hole mergers. We show, however, that the second law is not violated in the regime where Einstein–Gauss–Bonnet holds as an effective theory and black holes can be treated thermodynamically. For mergers of anti-de Sitter (AdS) black holes, the second law appears to be violated even in Einstein gravity; we argue, however, that the second law holds when gravitational potential energy is taken into account. (paper)

Gauss-Bonnet actions and their dimensionally reduced descendants

International Nuclear Information System (INIS)

Mueller-Hoissen, F.

1989-01-01

A brief introduction to Gauss-Bonnet type generalizations of the Einstein-Hilbert gravity action in more than four dimensions is given and the structure of associated (effective) theories obtained by dimensional reduction is discussed. (author)

Phase space of modified Gauss-Bonnet gravity

Energy Technology Data Exchange (ETDEWEB)

Carloni, Sante [Universidade de Lisboa-UL, Centro Multidisciplinar de Astrofisica-CENTRA, Instituto Superior Tecnico-IST, Lisbon (Portugal); Mimoso, Jose P. [Instituto de Astrofisica e Ciencias do Espaco, Universidade de Lisboa, Departamento de Fisica, Faculdade de Ciencias, Lisbon (Portugal)

2017-08-15

We investigate the evolution of non-vacuum Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetimes with any spatial curvature in the context of Gauss-Bonnet gravity. The analysis employs a new method which enables us to explore the phase space of any specific theory of this class. We consider several examples, discussing the transition from a decelerating into an acceleration universe within these theories. We also deduce from the dynamical equations some general conditions on the form of the action which guarantee the presence of specific behaviours like the emergence of accelerated expansion. As in f(R) gravity, our analysis shows that there is a set of initial conditions for which these models have a finite time singularity which can be an attractor. The presence of this instability also in the Gauss-Bonnet gravity is to be ascribed to the fourth-order derivative in the field equations, i.e., is the direct consequence of the higher order of the equations. (orig.)

Energy conditions in modified Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Garcia, Nadiezhda Montelongo; Harko, Tiberiu; Lobo, Francisco S. N.; Mimoso, Jose P.

2011-01-01

In considering alternative higher-order gravity theories, one is liable to be motivated in pursuing models consistent and inspired by several candidates of a fundamental theory of quantum gravity. Indeed, motivations from string/M theory predict that scalar field couplings with the Gauss-Bonnet invariant, G, are important in the appearance of nonsingular early time cosmologies. In this work, we discuss the viability of an interesting alternative gravitational theory, namely, modified Gauss-Bonnet gravity or f(G) gravity. We consider specific realistic forms of f(G) analyzed in the literature that account for the late-time cosmic acceleration and that have been found to cure the finite-time future singularities present in the dark energy models. We present the general inequalities imposed by the energy conditions and use the recent estimated values of the Hubble, deceleration, jerk and snap parameters to examine the viability of the above-mentioned forms of f(G) imposed by the weak energy condition.

Gravitational quasinormal modes of static Einstein-Gauss-Bonnet anti-de Sitter black holes

Science.gov (United States)

Ma, Hong; Li, Jin

2018-04-01

In this paper, we describe quasinormal modes (QNMs) for gravitational perturbations of Einstein-Gauss-Bonnet black holes (BHs) in higher dimensional spacetimes, and derive the corresponding parameters of such black holes in three types of spacetime (flat, de Sitter (dS) and anti-de Sitter (AdS)). Our attention is concentrated on discussing the (in)stability of Einstein-Gauss-Bonnet AdS BHs through the temporal evolution of all types of gravitational perturbation fields (tensor, vector and scalar). It is concluded that the potential functions in vector and scalar gravitational perturbations have negative regions, which suppress quasinormal ringing. Furthermore, the influences of the Gauss-Bonnet coupling parameter α, the number of dimensions n and the angular momentum quantum number l on the Einstein-Gauss-Bonnet AdS BHs quasinormal spectrum are analyzed. The QNM frequencies have greater oscillation and lower damping rate with the growth of α. This indicates that QNM frequencies become increasingly unstable with large α. Meanwhile, the dynamic evolutions of the perturbation field are compliant with the results of computation from the Horowitz and Hubeny method. Because the number of extra dimensions is connected with the string scale, the relationship between α and properties of Einstein-Gauss-Bonnet AdS BHs might be beneficial for the exploitation of string theory and extra-dimensional brane worlds. Supported by FAPESP (2012/08934-0), National Natural Science Foundation of China (11205254, 11178018, 11375279, 11605015), the Natural Science Foundation Project of CQ CSTC (2011BB0052), and the Fundamental Research Funds for the Central Universities (106112016CDJXY300002, 106112017CDJXFLX0014, CDJRC10300003)

Extremal dyonic black holes in D=4 Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Chen, C.-M.; Gal'tsov, Dmitri V.; Orlov, Dmitry G.

2008-01-01

We investigate extremal dyon black holes in the Einstein-Maxwell-dilaton theory with higher curvature corrections in the form of the Gauss-Bonnet density coupled to the dilaton. In the same theory without the Gauss-Bonnet term the extremal dyon solutions exist only for discrete values of the dilaton coupling constant a. We show that the Gauss-Bonnet term acts as a dyon hair tonic enlarging the allowed values of a to continuous domains in the plane (a,q m ) where q m is the magnetic charge. In the limit of the vanishing curvature coupling (a large magnetic charge) the dyon solutions obtained tend to the Reissner-Nordstroem solution but not to the extremal dyons of the Einstein-Maxwell-dilaton theory. Both solutions have the same dependence of the horizon radius in terms of charges. The entropy of new dyonic black holes interpolates between the Bekenstein-Hawking value in the limit of the large magnetic charge (equivalent to the vanishing Gauss-Bonnet coupling) and twice this value for the vanishing magnetic charge. Although an expression for the entropy can be obtained analytically using purely local near-horizon solutions, its interpretation as the black hole entropy is legitimate only once the global black hole solution is known to exist, and we obtain numerically the corresponding conditions on the parameters. Thus, a purely local analysis is insufficient to fully understand the entropy of the curvature-corrected black holes. We also find dyon solutions which are not asymptotically flat, but approach the linear dilaton background at infinity. They describe magnetic black holes on the electric linear dilaton background.

Effects of backreaction on power-Maxwell holographic superconductors in Gauss-Bonnet gravity

Energy Technology Data Exchange (ETDEWEB)

Salahi, Hamid Reza; Montakhab, Afshin [Shiraz University, Physics Department and Biruni Observatory, College of Sciences, Shiraz (Iran, Islamic Republic of); Sheykhi, Ahmad [Shiraz University, Physics Department and Biruni Observatory, College of Sciences, Shiraz (Iran, Islamic Republic of); Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), P.O. Box 55134-441, Maragha (Iran, Islamic Republic of)

2016-10-15

We analytically and numerically investigate the properties of s-wave holographic superconductors by considering the effects of scalar and gauge fields on the background geometry in five-dimensional Einstein-Gauss-Bonnet gravity. We assume the gauge field to be in the form of the power-Maxwell nonlinear electrodynamics. We employ the Sturm-Liouville eigenvalue problem for analytical calculation of the critical temperature and the shooting method for the numerical investigation. Our numerical and analytical results indicate that higher curvature corrections affect condensation of the holographic superconductors with backreaction. We observe that the backreaction can decrease the critical temperature of the holographic superconductors, while the power-Maxwell electrodynamics and Gauss-Bonnet coefficient term may increase the critical temperature of the holographic superconductors. We find that the critical exponent has the mean-field value β = 1/2, regardless of the values of Gauss-Bonnet coefficient, backreaction and power-Maxwell parameters. (orig.)

Collapsing spherical star in Scalar-Einstein-Gauss-Bonnet gravity with a quadratic coupling

Science.gov (United States)

Chakrabarti, Soumya

2018-04-01

We study the evolution of a self interacting scalar field in Einstein-Gauss-Bonnet theory in four dimension where the scalar field couples non minimally with the Gauss-Bonnet term. Considering a polynomial coupling of the scalar field with the Gauss-Bonnet term, a self-interaction potential and an additional perfect fluid distribution alongwith the scalar field, we investigate different possibilities regarding the outcome of the collapsing scalar field. The strength of the coupling and choice of the self-interaction potential serves as the pivotal initial conditions of the models presented. The high degree of non-linearity in the equation system is taken care off by using a method of invertibe point transformation of anharmonic oscillator equation, which has proven itself very useful in recent past while investigating dynamics of minimally coupled scalar fields.

DNA packing in chromatine, a manifestation of the Bonnet transformation.

Science.gov (United States)

Blum, Z; Lidin, S

1988-08-01

The packing of DNA is described using the formalism of differential geometry. Winding of the DNA double helix around the histone 2-5 octamer forming a nucleosome and the condensation of the so-formed bead-on-a-string chromatine aided by histone 1 is interpreted as two consecutive isometric, i.e. Bonnet, transformations. The DNA double helix can be approximated to a helicoid which can be transformed isometrically to a catenoid, an approximation of the nucleosome. Owing to the organization of the histone octamer the extended chromatine takes a helicoidal shape allowing a second Bonnet transformation to consummate the condensation into a chromatine fibre.

Characters named Charles or Charley in novels by Charles Dickens.

Science.gov (United States)

Barry, Herbert

2007-10-01

12 fictional characters named Charles or Charley are contained in eight of the 14 completed novels by Charles Dickens. Most of the author's namesakes have humorous attributes, an unusually close relationship with one or more other characters, and a happy subsequent life. Three stages of the author's adult life are youthful, mature, and after separation from his wife. The fictional namesakes are most humorous in the author's youthful stage and least humorous after separation from his wife. The 12 fictional namesakes of Charles Dickens are compared with the two fictional namesakes of Jane Austen.

Static solutions with nontrivial boundaries for the Einstein-Gauss-Bonnet theory in vacuum

International Nuclear Information System (INIS)

Dotti, Gustavo; Oliva, Julio; Troncoso, Ricardo

2010-01-01

The classification of a certain class of static solutions for the Einstein-Gauss-Bonnet theory in vacuum is performed in d≥5 dimensions. The class of metrics under consideration is such that the spacelike section is a warped product of the real line and an arbitrary base manifold. It is shown that for a generic value of the Gauss-Bonnet coupling, the base manifold must be necessarily Einstein, with an additional restriction on its Weyl tensor for d>5. The boundary admits a wider class of geometries only in the special case when the Gauss-Bonnet coupling is such that the theory admits a unique maximally symmetric solution. The additional freedom in the boundary metric enlarges the class of allowed geometries in the bulk, which are classified within three main branches, containing new black holes and wormholes in vacuum.

33 CFR 207.10 - Charles River, Mass.; dam of Charles River Basin Commission.

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Charles River, Mass.; dam of Charles River Basin Commission. 207.10 Section 207.10 Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.10 Charles River, Mass.; dam of...

A geological survey of the Lac du Bonnet batholith, Manitoba

International Nuclear Information System (INIS)

McCrank, G.F.D.

1985-02-01

This report presents the results of a geological survey of the Lac du Bonnet batholith in Manitoba. The survey consisted of field mapping of the lithologies and the joint systems throughout the batholith, and the examination of lineaments identified on aerial photographs and Landsat imagery. Petrographic descriptions and a map of the lithologies, an analysis of the fracture systems and a lineament map are presented. The results of various regional geophysical surveys were used as an aid to the interpretation of the batholith's contacts and in the interpretation of lineaments as possible faults. A comparison of the Lac du Bonnet Batholith with the Eye-Dashwa Lakes Pluton near Atikokan, Ontario is also presented

Quintessence background for 5D Einstein-Gauss-Bonnet black holes

Science.gov (United States)

Ghosh, Sushant G.; Amir, Muhammed; Maharaj, Sunil D.

2017-08-01

As we know that the Lovelock theory is an extension of the general relativity to the higher-dimensions, in this theory the first- and the second-order terms correspond to general relativity and the Einstein-Gauss-Bonnet gravity, respectively. We obtain a 5D black hole solution in Einstein-Gauss-Bonnet gravity surrounded by the quintessence matter, and we also analyze their thermodynamical properties. Owing to the quintessence corrected black hole, the thermodynamic quantities have also been corrected except for the black hole entropy, and a phase transition is achievable. The phase transition for the thermodynamic stability is characterized by a discontinuity in the specific heat at r=r_C, with the stable (unstable) branch for r ) r_C.

Second-order transport, quasinormal modes and zero-viscosity limit in the Gauss-Bonnet holographic fluid

Energy Technology Data Exchange (ETDEWEB)

Grozdanov, Sašo [Instituut-Lorentz for Theoretical Physics, Leiden University, Niels Bohrweg 2, Leiden 2333 CA (Netherlands); Starinets, Andrei O. [Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP (United Kingdom)

2017-03-30

Gauss-Bonnet holographic fluid is a useful theoretical laboratory to study the effects of curvature-squared terms in the dual gravity action on transport coefficients, quasinormal spectra and the analytic structure of thermal correlators at strong coupling. To understand the behavior and possible pathologies of the Gauss-Bonnet fluid in 3+1 dimensions, we compute (analytically and non-perturbatively in the Gauss-Bonnet coupling) its second-order transport coefficients, the retarded two- and three-point correlation functions of the energy-momentum tensor in the hydrodynamic regime as well as the relevant quasinormal spectrum. The Haack-Yarom universal relation among the second-order transport coefficients is violated at second order in the Gauss-Bonnet coupling. In the zero-viscosity limit, the holographic fluid still produces entropy, while the momentum diffusion and the sound attenuation are suppressed at all orders in the hydrodynamic expansion. By adding higher-derivative electromagnetic field terms to the action, we also compute corrections to charge diffusion and identify the non-perturbative parameter regime in which the charge diffusion constant vanishes.

Isometric surfaces with a common mean curvature and the problem of Bonnet pairs

International Nuclear Information System (INIS)

Sabitov, Idzhad Kh

2012-01-01

Simple methods are used to give new proofs, and sometimes to make them more precise, of basic theorems on isometric surfaces with a common mean curvature, which are usually called Bonnet pairs. The considerations are conducted under the assumption of minimally admissible smoothness of the objects in question, and certain necessary or sufficient criteria are given for the non-existence of Bonnet pairs with a common non-constant mean curvature among compact surfaces. Bibliography: 26 titles.

Quintessence background for 5D Einstein-Gauss-Bonnet black holes

Energy Technology Data Exchange (ETDEWEB)

Ghosh, Sushant G. [University of KwaZulu-Natal, Astrophysics and Cosmology Research Unit, School of Mathematics, Statistics and Computer Science, Durban (South Africa); Centre for Theoretical Physics, New Delhi (India); Amir, Muhammed [Centre for Theoretical Physics, New Delhi (India); Maharaj, Sunil D. [University of KwaZulu-Natal, Astrophysics and Cosmology Research Unit, School of Mathematics, Statistics and Computer Science, Durban (South Africa)

2017-08-15

As we know that the Lovelock theory is an extension of the general relativity to the higher-dimensions, in this theory the first- and the second-order terms correspond to general relativity and the Einstein-Gauss-Bonnet gravity, respectively. We obtain a 5D black hole solution in Einstein-Gauss-Bonnet gravity surrounded by the quintessence matter, and we also analyze their thermodynamical properties. Owing to the quintessence corrected black hole, the thermodynamic quantities have also been corrected except for the black hole entropy, and a phase transition is achievable. The phase transition for the thermodynamic stability is characterized by a discontinuity in the specific heat at r = r{sub C}, with the stable (unstable) branch for r < (>) r{sub C}. (orig.)

Charged Rényi entropies in CFTs with Einstein-Gauss-Bonnet holographic duals

Science.gov (United States)

Pastras, Georgios; Manolopoulos, Dimitrios

2014-11-01

We calculate the Rényi entropy S q ( μ, λ), for spherical entangling surfaces in CFT's with Einstein-Gauss-Bonnet-Maxwell holographic duals. Rényi entropies must obey some interesting inequalities by definition. However, for Gauss-Bonnet couplings λ, larger than specific value, but still allowed by causality, we observe a violation of the inequality , which is related to the existence of negative entropy black holes, providing interesting restrictions in the bulk theory. Moreover, we find an interesting distinction of the behaviour of the analytic continuation of S q ( μ, λ) for imaginary chemical potential, between negative and non-negative λ.

Fate of black branes in Einstein-Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Suranyi, P.; Wijewardhana, L. C. R.; Vaz, C.

2009-01-01

Black branes are studied in Einstein-Gauss-Bonnet gravity. Evaporation drives black branes toward one of two singularities depending on the sign of α, the Gauss-Bonnet coupling. For positive α and sufficiently large ratio √(α)/L, where L/2π is the radius of compactification, black branes avoid the Gregory-Laflamme (GL) instability before reaching a critical state. No black branes with the radius of horizon smaller than the critical value can exist. Approaching the critical state branes have a nonzero Hawking temperature. For negative α all black branes encounter the GL instability. No black branes may exist outside of the interval of the critical values 0≤β h 2 and r h is the radius of horizon of the black brane. The first order phase transition line of GL transitions ends in a second order phase transition point at β=0.

History of cosmic evolution with modified Gauss-Bonnet-dilatonic coupled term

Energy Technology Data Exchange (ETDEWEB)

Debnath, Subhra; Sanyal, Abhik Kumar [Jangipur College, Department of Physics, Murshidabad (India); Ruz, Soumendra Nath [Ramananda Centenary College, Department of Physics, Purulia (India); Mandal, Ranajit [University of Kalyani, Department of Physics, Nadia (India)

2017-05-15

Gauss-Bonnet-dilatonic coupling in four dimensions plays an important role to explain late-time cosmic evolution. However, this term is an outcome of the low energy string effective action and thus ought to be important in the early universe too. Unfortunately, a phase-space formulation of such a theory does not exist in the literature due to branching. We therefore consider a modified theory of gravity, which contains a nonminimally coupled scalar-tensor sector in addition to a higher-order scalar curvature invariant term with Gauss-Bonnet-dilatonic coupling. Such an action unifies early inflation with late-time cosmic acceleration. The quantum version of the theory is also well behaved. (orig.)

History of cosmic evolution with modified Gauss-Bonnet-dilatonic coupled term

International Nuclear Information System (INIS)

Debnath, Subhra; Sanyal, Abhik Kumar; Ruz, Soumendra Nath; Mandal, Ranajit

2017-01-01

Gauss-Bonnet-dilatonic coupling in four dimensions plays an important role to explain late-time cosmic evolution. However, this term is an outcome of the low energy string effective action and thus ought to be important in the early universe too. Unfortunately, a phase-space formulation of such a theory does not exist in the literature due to branching. We therefore consider a modified theory of gravity, which contains a nonminimally coupled scalar-tensor sector in addition to a higher-order scalar curvature invariant term with Gauss-Bonnet-dilatonic coupling. Such an action unifies early inflation with late-time cosmic acceleration. The quantum version of the theory is also well behaved. (orig.)

Stationary vs. singular points in an accelerating FRW cosmology derived from six-dimensional Einstein-Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Elizalde, E.; Makarenko, A.N.; Obukhov, V.V.; Osetrin, K.E.; Filippov, A.E.

2007-01-01

Six-dimensional Einstein-Gauss-Bonnet gravity (with a linear Gauss-Bonnet term) is investigated. This theory is inspired by basic features of results coming from string and M-theory. Dynamical compactification is carried out and it is seen that a four-dimensional accelerating FRW universe is recovered, when the two-dimensional internal space radius shrinks. A non-perturbative structure of the corresponding theory is identified which has either three or one stable fixed points, depending on the Gauss-Bonnet coupling being positive or negative. A much richer structure than in the case of the perturbative regime of the dynamical compactification recently studied by Andrew, Bolen, and Middleton is exhibited

On static black holes solutions in Einstein and Einstein-Gauss-Bonnet gravity with topology [Formula: see text].

Science.gov (United States)

Dadhich, Naresh; Pons, Josep M

We study static black hole solutions in Einstein and Einstein-Gauss-Bonnet gravity with the topology of the product of two spheres, [Formula: see text], in higher dimensions. There is an unusual new feature of the Gauss-Bonnet black hole: the avoidance of a non-central naked singularity prescribes a mass range for the black hole in terms of [Formula: see text]. For an Einstein-Gauss-Bonnet black hole a limited window of negative values for [Formula: see text] is also permitted. This topology encompasses black strings, branes, and generalized Nariai metrics. We also give new solutions with the product of two spheres of constant curvature.

Simple compactifications and black p-branes in Gauss-Bonnet and Lovelock theories

International Nuclear Information System (INIS)

Giribet, Gaston; Oliva, Julio; Troncoso, Ricardo

2006-01-01

We look for the existence of asymptotically flat simple compactifications of the form M D-p x T p in D-dimensional gravity theories with higher powers of the curvature. Assuming the manifold M D-p to be spherically symmetric, it is shown that the Einstein-Gauss-Bonnet theory admits this class of solutions only for the pure Einstein-Hilbert or Gauss-Bonnet Lagrangians, but not for an arbitrary linear combination of them. Once these special cases have been selected, the requirement of spherical symmetry is no longer relevant since actually any solution of the pure Einstein or pure Gauss-Bonnet theories can then be toroidally extended to higher dimensions. Depending on p and the spacetime dimension, the metric on M D-p may describe a black hole or a spacetime with a conical singularity, so that the whole spacetime describes a black or a cosmic p-brane, respectively. For the purely Gauss-Bonnet theory it is shown that, if M D-p is four-dimensional, a new exotic class of black hole solutions exists, for which spherical symmetry can be relaxed. Under the same assumptions, it is also shown that simple compactifications acquire a similar structure for a wide class of theories among the Lovelock family which accepts this toroidal extension. The thermodynamics of black p-branes is also discussed, and it is shown that a thermodynamical analogue of the Gregory-Laflamme transition always occurs regardless the spacetime dimension or the theory considered, hence not only for General Relativity. Relaxing the asymptotically flat behavior, it is also shown that exact black brane solutions exist within a very special class of Lovelock theories

A note on the viability of Gauss-Bonnet cosmology

International Nuclear Information System (INIS)

Chingangbam, R.; Sami, M.; Tretyakov, P.V.; Toporensky, A.V.

2008-01-01

In this Letter, we analyze the viability of a vacuum Gauss-Bonnet cosmology by examining the dynamics of the homogeneous and anisotropic background in 4+1 dimensions. The trajectories of the system either originate from the standard singularity or from non-standard type, the later is characterized by the divergence of time derivative of the Hubble parameters for its finite value. At the onset, the system should relax to Einstein phase at late times as the effect of Gauss-Bonnet term becomes negligible in the low energy regime. However, we find that most of the trajectories emerging from the standard big-bang singularity lead to future re-collapse whereas the system beginning its evolution from the non-standard singularity enters the Kasner regime at late times. This leads to the conclusion that the measure of trajectories giving rise to a smooth evolution from a standard singularity to the Einstein phase is negligibly small for generic initial conditions

Manejo de desechos industriales peligrosos

Directory of Open Access Journals (Sweden)

Hilda Quesada

2007-05-01

Full Text Available El manejo apropiado de los desechos peligrosos es un problema poco abordado en la gestión de residuos en el país. En este estudio se realizó una búsqueda de información disponible en cuanto a la generación y manejo a nivel interno y externo de los desechos peligrosos por parte de las industrias nacionales. Además, se trabajó con once empresas de diferentes tipos de actividades industriales para, mediante un cuestionario, entrevistas y visitas, determinar el grado de manejo integral y adecuado de los desechos que generan. Se determinó que existensolamente algunos informes aislados sobre la generación de desechos industriales peligrosos y su manejo. También, resultó imposible determinar la cantidad total dedesechos generados en el país.Las empresas consultadas presentaron deficiencias en todas las etapas del manejo de sus desechos, a saber: generación, acumulación y almacenamiento, transporte, tratamiento y disposición final. La falta de conocimiento de la legislación y del manejo apropiado de los desechos se presentó como la principal causa del mal manejo de los residuos. Pero, también, fue evidente la falta de entidades estatales o privadas encargadas de dar servicios dealmacenamiento, transporte, tratamiento y disposición final de desechos peligrosos en el país.

One-loop effective action for non-local modified Gauss-Bonnet gravity in de Sitter space

Energy Technology Data Exchange (ETDEWEB)

Cognola, Guido; Zerbini, Sergio [Universita di Trento (Italy); Istituto Nazionale di Fisica Nucleare Gruppo Collegato di Trento, Dipartimento di Fisica, Trento (Italy); Elizalde, Emilio [Consejo Superior de Investigaciones Cientificas (ICE/CSIC) and Institut d' Estudis Espacials de Catalunya (IEEC), Facultat Ciencies, Bellaterra (Barcelona) (Spain); Nojiri, Shin' ichi [Nagoya University, Department of Physics, Nagoya (Japan); Odintsov, Sergei D. [Consejo Superior de Investigaciones Cientificas (ICE/CSIC) and Institut d' Estudis Espacials de Catalunya (IEEC), Facultat Ciencies, Bellaterra (Barcelona) (Spain); ICREA, Barcelona (Spain); TSPU, Center of Theor. Phys., Tomsk (Russian Federation)

2009-12-15

We discuss the classical and quantum properties of non-local modified Gauss-Bonnet gravity in de Sitter space, using its equivalent representation via string-inspired local scalar-Gauss-Bonnet gravity with a scalar potential. A classical, multiple de Sitter universe solution is found where one of the de Sitter phases corresponds to the primordial inflationary epoch, while the other de Sitter space solution - the one with the smallest Hubble rate - describes the late-time acceleration of our universe. A Chameleon scenario for the theory under investigation is developed, and it is successfully used to show that the theory complies with gravitational tests. An explicit expression for the one-loop effective action for this non-local modified Gauss-Bonnet gravity in the de Sitter space is obtained. It is argued that this effective action might be an important step towards the solution of the cosmological constant problem. (orig.)

Spacetime structure of static solutions in Gauss-Bonnet gravity: Neutral case

International Nuclear Information System (INIS)

Torii, Takashi; Maeda, Hideki

2005-01-01

We study the spacetime structures of the static solutions in the n-dimensional Einstein-Gauss-Bonnet-Λ system systematically. We assume the Gauss-Bonnet coefficient α is non-negative and a cosmological constant is either positive, zero, or negative. The solutions have the (n-2)-dimensional Euclidean submanifold, which is the Einstein manifold with the curvature k=1, 0, and -1. We also assume 4α-tilde/l 2 ≤1, where l is the curvature radius, in order for the sourceless solution (M=0) to be defined. The general solutions are classified into plus and minus branches. The structures of the center, horizons, infinity, and the singular point depend on the parameters α, l 2 , k, M, and branches complicatedly so that a variety of global structures for the solutions are found. In our analysis, the M-tilde-r diagram is used, which makes our consideration clear and enables easy understanding by visual effects. In the plus branch, all the solutions have the same asymptotic structure at infinity as that in general relativity with a negative cosmological constant. For the negative-mass parameter, a new type of singularity called the branch singularity appears at nonzero finite radius r=r b >0. The divergent behavior around the singularity in Gauss-Bonnet gravity is milder than that around the central singularity in general relativity. There are three types of horizons: inner, black hole, and cosmological. In the k=1,0 cases, the plus-branch solutions do not have any horizon. In the k=-1 case, the radius of the horizon is restricted as r h h >√(2α-tilde)) in the plus (minus) branch. The black hole solution with zero or negative mass exists in the plus branch even for the zero or positive cosmological constant. There is also the extreme black hole solution with positive mass. We briefly discuss the effect of the Gauss-Bonnet corrections on black hole formation in a collider and the possibility of the violation of the third law of the black hole thermodynamics

Horizons of radiating black holes in Einstein-Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Ghosh, S. G.; Deshkar, D. W.

2008-01-01

A Vaidya-based model of a radiating black hole is studied in a 5-dimensional Einstein gravity with Gauss-Bonnet contribution of quadratic curvature terms. The structure and locations of the apparent and event horizons of the radiating black hole are determined

Einstein-Gauss-Bonnet metrics: black holes, black strings and a staticity theorem

International Nuclear Information System (INIS)

Bogdanos, C.; Charmousis, C.; Gouteraux, B.; Zegers, R.

2009-01-01

We find the general solution of the 6-dimensional Einstein-Gauss-Bonnet equations in a large class of space and time-dependent warped geometries. Several distinct families of solutions are found, some of which include black string metrics, space and time-dependent solutions and black holes with exotic horizons. Among these, some are shown to verify a Birkhoff type staticity theorem, although here, the usual assumption of maximal symmetry on the horizon is relaxed, allowing exotic horizon geometries. We provide explicit examples of such static exotic black holes, including ones whose horizon geometry is that of a Bergman space. We find that the situation is very different from higher-dimensional general relativity, where Einstein spaces are admissible black hole horizons and the associated black hole potential is not even affected. In Einstein-Gauss-Bonnet theory, on the contrary, the non-trivial Weyl tensor of such exotic horizons is exposed to the bulk dynamics through the higher order Gauss-Bonnet term, severely constraining the allowed horizon geometries and adding a novel charge-like parameter to the black hole potential. The latter is related to the Euler characteristic of the four-dimensional horizon and provides, in some cases, additional black hole horizons.

Hydrogeologic characteristics of domains of sparsely fractured rock in the granitic Lac Du Bonnet Batholith, southeastern Manitoba, Canada

International Nuclear Information System (INIS)

Stevenson, D.R.; Kozak, E.T.; Davison, C.C.; Gascoyne, M.; Broadfoot, R.A.

1996-06-01

The hydrogeologic characteristics of the granitic Lac du Bonnet batholith in southeastern Manitoba have been studied since 1978, as part of AECL's program to assess the concept of disposing of Canada's nuclear fuel waste deep within plutonic rocks of the Canadian Shield (Davison et al. 1994a). These studies have included an extensive program of drilling, logging, testing, sampling and monitoring in 19 deep surface boreholes drilled at Grid areas located across the Lac du Bonnet batholith, at the Whiteshell Laboratory (WL), and in surface and underground boreholes at the Underground Research Laboratory (URL). Based on these investigations domains of low permeability, sparsely fractured rock (SFR) have been identified in the Lac du Bonnet batholith

Reduction of entanglement degradation in Einstein-Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Nasr Esfahani, B.; Shamirzaie, M.; Soltani, M.

2011-01-01

Bipartite entanglement for states of a noninteracting bosonic or fermionic field in the spacetime of a spherically symmetric black hole of Einstein-Gauss-Bonnet gravity is investigated. Although the initial state is chosen to be maximally entangled as the Bell states, the Hawking-Unruh effect causes the state to be mixed and the entanglement degrades, but with different asymptotic behaviors for the fermionic and bosonic fields. The Gauss-Bonnet term with positive α can play an antigravitation role and so this causes a decrease in the Hawking-Unruh effect and consequently reduces the entanglement degradation. On the other hand, the suggested higher dimensions for the spacetime lead to increased entanglement degradation by increasing the dimension. There is a dramatic difference between the behaviors of the entanglement in terms of the radius of the horizon for a five-dimensional black hole and that for higher dimensional black holes. Both bosonic and fermionic fields entanglements are treated beyond the single-mode approximation. Also, the cases where the accelerating observers located at regions near and far from the event horizon of black hole are studied separately.

Finite-time future singularities in modified Gauss-Bonnet and F(R,G) gravity and singularity avoidance

International Nuclear Information System (INIS)

Bamba, Kazuharu; Odintsov, Sergei D.; Sebastiani, Lorenzo; Zerbini, Sergio

2010-01-01

We study all four types of finite-time future singularities emerging in the late-time accelerating (effective quintessence/phantom) era from F(R,G)-gravity, where R and G are the Ricci scalar and the Gauss-Bonnet invariant, respectively. As an explicit example of F(R,G)-gravity, we also investigate modified Gauss-Bonnet gravity, so-called F(G)-gravity. In particular, we reconstruct the F(G)-gravity and F(R,G)-gravity models where accelerating cosmologies realizing the finite-time future singularities emerge. Furthermore, we discuss a possible way to cure the finite-time future singularities in F(G)-gravity and F(R,G)-gravity by taking into account higher-order curvature corrections. The example of non-singular realistic modified Gauss-Bonnet gravity is presented. It turns out that adding such non-singular modified gravity to singular Dark Energy makes the combined theory a non-singular one as well. (orig.)

Genealogy of John and Charles Bell: their relationship with the children of Charles Shaw of Ayr.

Science.gov (United States)

Kaufman, M

2005-11-01

The Reverend William Bell had six children who survived infancy. Two of his sons entered the legal profession and two other sons became distinguished anatomists and surgeons--John Bell, said for 20 years to have been the leading operating surgeon in Britain and throughout the world--and Sir Charles Bell, possibly the most distinguished anatomist and physiologist of his day. Information is not known about the fifth son or their sister. Charles Shaw, a lawyer of Ayr, had four sons and two daughters who survived infancy. Two of his sons, John and Alexander, became anatomists and later surgeons at the Middlesex Hospital, and both worked closely with Charles Bell at the Great Windmill Street School of Anatomy. His third son entered the law and his fourth son became a distinguished soldier. The two daughters of Charles Shaw married into the Bell family: Barbara married George Joseph Bell and Marion married Mr (later Sir) Charles Bell.

Holographic Van der Waals-like phase transition in the Gauss–Bonnet gravity

Energy Technology Data Exchange (ETDEWEB)

He, Song, E-mail: hesong17@gmail.com [Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, 14476 Golm (Germany); State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 (China); Li, Li-Fang, E-mail: lilf@itp.ac.cn [Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190 (China); Zeng, Xiao-Xiong, E-mail: xxzeng@itp.ac.cn [State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 (China); School of Material Science and Engineering, Chongqing Jiaotong University, Chongqing 400074 (China)

2017-02-15

The Van der Waals-like phase transition is observed in temperature–thermal entropy plane in spherically symmetric charged Gauss–Bonnet–AdS black hole background. In terms of AdS/CFT, the non-local observables such as holographic entanglement entropy, Wilson loop, and two point correlation function of very heavy operators in the field theory dual to spherically symmetric charged Gauss–Bonnet–AdS black hole have been investigated. All of them exhibit the Van der Waals-like phase transition for a fixed charge parameter or Gauss–Bonnet parameter in such gravity background. Further, with choosing various values of charge or Gauss–Bonnet parameter, the equal area law and the critical exponent of the heat capacity are found to be consistent with phase structures in temperature–thermal entropy plane.

General aspects of Gauss-Bonnet models without potential in dimension four

Energy Technology Data Exchange (ETDEWEB)

Santillán, Osvaldo P., E-mail: firenzecita@hotmail.com [Departamento de Matemáticas Luis Santaló (IMAS), Buenos Aires (Argentina)

2017-07-01

In the present work, the isotropic and homogenous solutions with spatial curvature k =0 of four dimensional Gauss-Bonnet models are characterized. The main assumption is that the scalar field φ which is coupled to the Gauss-Bonnet term has no potential [1]–[2]. Some singular and some eternal solutions are described. The evolution of the universe is given in terms of a curve γ=( H (φ), φ) which is the solution of a polynomial equation P ( H {sup 2}, φ)=0 with φ dependent coefficients. In addition, it is shown that the initial conditions in these models put several restrictions on the evolution. For instance, an universe initially contracting will be contracting always for future times and an universe that is expanding was always expanding at past times. Thus, there are no cyclic cosmological solutions for this model. These results are universal, that is, independent on the form of the coupling f (φ) between the scalar field and the Gauss-Bonnet term. In addition, a proof that at a turning point φ-dot →0 a singularity necessarily emerges is presented, except for some specific choices of the coupling. This is valid unless the Hubble constant H → 0 at this point. This proof is based on the Raychaudhuri equation for the model. The description presented here is in part inspired in the works [3]–[4]. However, the mathematical methods that are implemented are complementary of those in these references, and they may be helpful for study more complicated situations in a future.

The first Charles Darwin (1758-78).

Science.gov (United States)

Harris, Stuart

2009-11-01

The paper places the first Charles Darwin in his family context: the eldest son of Dr Erasmus Darwin and Mary Howard. Mention is made of Charles's upbringing and education, with illustrative material taken from his father's writings and from Anna Seward's Memoirs of the Life of Dr Darwin (1804). The part played by Dr Andrew Duncan of the Edinburgh Medical School is established. The award to Charles in March 1778 of the first medal by the Aesculapian Society of Edinburgh is described. The involvement of Dr William Cullen and Dr Joseph Black in the treatment of Charles's fatal infection is evidenced from Erasmus' letters. Attention is given to 'An Elegy on the much-lamented death of a most ingenious young gentleman who lately died in the College at Edinburgh where he was a student' which was written jointly by Duncan and Erasmus in 1778. The Elegy's curious publishing history will be glanced at. The paper concludes with a statement of Charles's great promise as a medical student and of Erasmus' efforts to ensure that his son's achievements were memorialised.

The effect of the Gauss-Bonnet term on Hawking radiation from arbitrary dimensional black brane

International Nuclear Information System (INIS)

Kuang, Xiao-Mei; Saavedra, Joel; Oevguen, Ali

2017-01-01

We investigate the probabilities of the tunneling and the radiation spectra of massive spin-1 particles from arbitrary dimensional Gauss-Bonnet-Axions (GBA) Anti-de Sitter (AdS) black branes, via using the WKB approximation to the Proca spin-1 field equation. The tunneling probabilities and Hawking temperature of the arbitrary dimensional GBA AdS black brane is calculated via the Hamilton-Jacobi approach. We also compute the Hawking temperature via the Parikh-Wilczek tunneling approach. The results obtained from the two methods are consistent. In our setup, the Gauss-Bonnet (GB) coupling affects the Hawking temperature if and only if the momentum of the axion fields is non-vanishing. (orig.)

The effect of the Gauss-Bonnet term on Hawking radiation from arbitrary dimensional black brane

Energy Technology Data Exchange (ETDEWEB)

Kuang, Xiao-Mei [Instituto de Fisica, Pontificia Universidad Catolica de Valparaiso, Valparaiso (Chile); Yangzhou University, Center for Gravitation and Cosmology, College of Physical Science and Technology, Yangzhou (China); Saavedra, Joel [Instituto de Fisica, Pontificia Universidad Catolica de Valparaiso, Valparaiso (Chile); Oevguen, Ali [Instituto de Fisica, Pontificia Universidad Catolica de Valparaiso, Valparaiso (Chile); Eastern Mediterranean University, Physics Department, Famagusta, Northern Cyprus (Country Unknown)

2017-09-15

We investigate the probabilities of the tunneling and the radiation spectra of massive spin-1 particles from arbitrary dimensional Gauss-Bonnet-Axions (GBA) Anti-de Sitter (AdS) black branes, via using the WKB approximation to the Proca spin-1 field equation. The tunneling probabilities and Hawking temperature of the arbitrary dimensional GBA AdS black brane is calculated via the Hamilton-Jacobi approach. We also compute the Hawking temperature via the Parikh-Wilczek tunneling approach. The results obtained from the two methods are consistent. In our setup, the Gauss-Bonnet (GB) coupling affects the Hawking temperature if and only if the momentum of the axion fields is non-vanishing. (orig.)

5D black hole solution in Einstein-Yang-Mills-Gauss-Bonnet theory

International Nuclear Information System (INIS)

Mazharimousavi, S. Habib; Halilsoy, M.

2007-01-01

By adopting the 5D version of the Wu-Yang ansatz we present in closed form a black hole solution in the Einstein-Yang-Mills-Gauss-Bonnet theory. In the Einstein-Yang-Mills limit, we recover the 5D black hole solution already known

Black-hole solutions with scalar hair in Einstein-scalar-Gauss-Bonnet theories

Science.gov (United States)

Antoniou, G.; Bakopoulos, A.; Kanti, P.

2018-04-01

In the context of the Einstein-scalar-Gauss-Bonnet theory, with a general coupling function between the scalar field and the quadratic Gauss-Bonnet term, we investigate the existence of regular black-hole solutions with scalar hair. Based on a previous theoretical analysis, which studied the evasion of the old and novel no-hair theorems, we consider a variety of forms for the coupling function (exponential, even and odd polynomial, inverse polynomial, and logarithmic) that, in conjunction with the profile of the scalar field, satisfy a basic constraint. Our numerical analysis then always leads to families of regular, asymptotically flat black-hole solutions with nontrivial scalar hair. The solution for the scalar field and the profile of the corresponding energy-momentum tensor, depending on the value of the coupling constant, may exhibit a nonmonotonic behavior, an unusual feature that highlights the limitations of the existing no-hair theorems. We also determine and study in detail the scalar charge, horizon area, and entropy of our solutions.

Fractionated x-radiation damage to developing ovaries in the Bonnet Monkey (Macaca radiata)

International Nuclear Information System (INIS)

Andersen, A.C.; Hendrickx, A.G.; Momeni, M.H.

1977-01-01

Fractionated x-ray exposures of 11.5 rad each (total 200 rad) given twice weekly between 77 and 133 days postcoitum severely damaged the ovaries of eight out of nine fetal bonnet monkeys. This radiation regimen reduced follicle counts by 75% or more

A geological reconnaissance study of the Lac du Bonnet batholith

International Nuclear Information System (INIS)

Tammemagi, H.Y.; Kerford, P.S.; Requeima, J.C.; Temple, C.A.

1980-02-01

A geological reconnaissance survey was carried out of the Lac du Bonnet batholith, southeastern Manitoba, as part of the concept verification phase of the nuclear fuel waste disposal program for Canada. This report summarizes available geological information, presents the results of field mapping and discusses the geochemical analyses of rock samples. The geological and structural aspects of the batholith are described as well as its regional setting and possible genesis. (auth)

Colliding scalar pulses in the Einstein-Gauss-Bonnet gravity

Directory of Open Access Journals (Sweden)

Shinkai Hisaaki

2018-01-01

Full Text Available We numerically investigated how the nonlinear dynamics depends on the dimensionality and on the higher-order curvature corrections in the form of Gauss-Bonnet (GB terms, with a model of colliding scalar pulses in plane-symmetric space-time. We observed that a collision of large scalar pulses will produce a large-curvature region, of which the magnitude depends on αGB. The normal corrections (αGB > 0 work for avoiding the appearance of singularity, although it is inevitable.

Reconstruction of the Scalar Field Potential in Inflationary Models with a Gauss-Bonnet term

Science.gov (United States)

Koh, Seoktae; Lee, Bum-Hoon; Tumurtushaa, Gansukh

2017-06-01

We consider inflationary models with a Gauss-Bonnet term to reconstruct the scalar-field potentials and the Gauss-Bonnet coupling functions. Both expressions are derived from the observationally favored configurations of ns and r . Our result implies that, for the reconstructed potentials and coupling functions, the blue tilt of inflationary tensor fluctuations can be realized. To achieve a blue tilt for the inflationary tensor fluctuations, a scalar field must climb up its potential before rolling down. We further investigate the properties of propagation of the perturbation modes in Friedmann-Robertson-Walker spacetime. For the reconstructed configurations that give rise to the blue tilt for the inflationary tensor fluctuations, we show that the ghosts and instabilities are absent with the superluminal propagation speeds for the scalar perturbation modes, whereas the propagation speeds of the tensor perturbations are subluminal.

Charles River Fish Contaminant Survey, April 2001

Science.gov (United States)

Report summarizing a biological monitoring component of the Clean Charles River 2005 initiative through the monitoring & analysis of fish within the lower Charles River basin, implemented by the EPA New England Regional Laboratory in the late fall of 1999.

33 CFR 117.591 - Charles River and its tributaries.

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Charles River and its tributaries... BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Massachusetts § 117.591 Charles River and its tributaries. (a) The following requirements apply to all bridges across the Charles River and it's...

Scalar hair around charged black holes in Einstein-Gauss-Bonnet gravity

Science.gov (United States)

Grandi, Nicolás; Landea, Ignacio Salazar

2018-02-01

We explore charged black hole solutions in Einstein-Gauss-Bonnet gravity in five dimensions, with a charged scalar hair. We interpret such hairy black holes as the final state of the superradiant instability previously reported for this system. We explore the relation of the hairy black hole solutions with the nonbackreacting quasibound states and scalar clouds, as well as with the boson star solutions.

Kink-antikink, trapping bags and five-dimensional Gauss-Bonnet gravity

OpenAIRE

Giovannini, Massimo

2006-01-01

Five-dimensional Gauss-Bonnet gravity, with one warped extra-dimension, allows classes of solutions where two scalar fields combine either in a kink-antikink system or in a trapping bag configuration. While the kink-antikink system can be interpreted as a pair of gravitating domain walls with opposite topological charges, the trapping bag solution consists of a domain wall supplemented by a non-topological defect. In both classes of solutions, for large absolute values of the bulk coordinate ...

MANEJO INTEGRADO VS. MANEJO TRADICIONAL DE ANTRACNOSIS EN CULTIVOS DE FRÍJOL EN TIMBIO CAUCA

Directory of Open Access Journals (Sweden)

CONSUELO MONTES R.

Full Text Available Con el objeto de evaluar la antracnosis (Colletotrichum lindemuthianum en el cultivo de fríjol (Phaseolus vulgaris en el Municipio de Timbío, Departamento del Cauca - Colombia, se realizó un ensayo en un diseño de bloques completos al azar con dos tratamientos y tres repeticiones. Se evaluaron dos variedades de frijol (Diacol Calima y AFR 612 en dos sistemas de manejo: Manejo Tradicional, empleado por agricultores de la zona con aplicaciones frecuentes de fungicidas para controlar la enfermedad. Se evaluaron las variables incidencia y severidad de la enfermedad en hojas, flores y vainas en las etapas V2, V4, R6 del cultivo (primera hoja trifoliada, tercera hoja trifoliada y prefloración y en las etapas R7 (formación de vainas y R8 (llenado de vainas, vainas/planta, producción vainas/parcela, rendimiento grano/parcela (g, peso de 100 semillas (g y porcentaje de germinación. Los resultados mostraron que la variedad Diacol Calima bajo Manejo Tradicional presentó los porcentajes más altos de incidencia de antracnosis en las etapas V2, V4 y R6 para hojas y R8 en vainas. La variedad AFR 612 en Manejo Integrado presentó los porcentajes de incidencia de antracnosis más bajos y los mayores rendimientos.

New higher-derivative invariants in N=2 supergravity and the Gauss-Bonnet term

NARCIS (Netherlands)

Butter, D.; de Wit, B.; Kuzenko, S.M.; Lodato, I.|info:eu-repo/dai/nl/357520890

2013-01-01

A new class of N = 2 locally supersymmetric higher-derivative invariants is constructed based on logarithms of conformal primary chiral superfields. They characteristically involve a coupling to Rμν 2 − 1 3 R2, which equals the non-conformal part of the Gauss-Bonnet term. Upon combining one such

Cosmological dynamics of spatially flat Einstein-Gauss-Bonnet models in various dimensions: high-dimensional Λ-term case

Energy Technology Data Exchange (ETDEWEB)

Pavluchenko, Sergey A. [Universidade Federal do Maranhao (UFMA), Programa de Pos-Graduacao em Fisica, Sao Luis, Maranhao (Brazil)

2017-08-15

In this paper we perform a systematic study of spatially flat [(3+D)+1]-dimensional Einstein-Gauss-Bonnet cosmological models with Λ-term. We consider models that topologically are the product of two flat isotropic subspaces with different scale factors. One of these subspaces is three-dimensional and represents our space and the other is D-dimensional and represents extra dimensions. We consider no ansatz of the scale factors, which makes our results quite general. With both Einstein-Hilbert and Gauss-Bonnet contributions in play, D = 3 and the general D ≥ 4 cases have slightly different dynamics due to the different structure of the equations of motion. We analytically study the equations of motion in both cases and describe all possible regimes with special interest on the realistic regimes. Our analysis suggests that the only realistic regime is the transition from high-energy (Gauss-Bonnet) Kasner regime, which is the standard cosmological singularity in that case, to the anisotropic exponential regime with expanding three and contracting extra dimensions. Availability of this regime allows us to put a constraint on the value of Gauss-Bonnet coupling α and the Λ-term - this regime appears in two regions on the (α, Λ) plane: α < 0, Λ > 0, αΛ ≤ -3/2 and α > 0, αΛ ≤ (3D{sup 2} - 7D + 6)/(4D(D-1)), including the entire Λ < 0 region. The obtained bounds are confronted with the restrictions on α and Λ from other considerations, like causality, entropy-to-viscosity ratio in AdS/CFT and others. Joint analysis constrains (α, Λ) even further: α > 0, D ≥ 2 with (3D{sup 2} - 7D + 6)/(4D(D-1)) ≥ αΛ ≥ -(D+2)(D+3)(D{sup 2} + 5D + 12)/(8(D{sup 2} + 3D + 6){sup 2}). (orig.)

Lake Charles CCS Project

Energy Technology Data Exchange (ETDEWEB)

Leib, Thomas [Leucadia Energy, LLC, Salt Lake City, UT (United States); Cole, Dan [Denbury Onshore, LLC, Plano, TX (United States)

2015-06-30

In late September 2014 development of the Lake Charles Clean Energy (LCCE) Plant was abandoned resulting in termination of Lake Charles Carbon Capture and Sequestration (CCS) Project which was a subset the LCCE Plant. As a result, the project was only funded through Phase 2A (Design) and did not enter Phase 2B (Construction) or Phase 2C (Operations). This report was prepared relying on information prepared and provided by engineering companies which were engaged by Leucadia Energy, LLC to prepare or review Front End Engineering and Design (FEED) for the Lake Charles Clean Energy Project, which includes the Carbon Capture and Sequestration (CCS) Project in Lake Charles, Louisiana. The Lake Charles Carbon Capture and Sequestration (CCS) Project was to be a large-scale industrial CCS project intended to demonstrate advanced technologies that capture and sequester carbon dioxide (CO₂) emissions from industrial sources into underground formations. The Scope of work was divided into two discrete sections; 1) Capture and Compression prepared by the Recipient Leucadia Energy, LLC, and 2) Transport and Sequestration prepared by sub-Recipient Denbury Onshore, LLC. Capture and Compression-The Lake Charles CCS Project Final Technical Report describes the systems and equipment that would be necessary to capture CO₂ generated in a large industrial gasification process and sequester the CO₂ into underground formations. The purpose of each system is defined along with a description of its equipment and operation. Criteria for selection of major equipment are provided and ancillary utilities necessary for safe and reliable operation in compliance with environmental regulations are described. Construction considerations are described including a general arrangement of the CCS process units within the overall gasification project. A cost estimate is provided, delineated by system area with cost breakdown showing equipment, piping and materials

Quasinormal modes of Gauss-Bonnet-AdS black holes: towards holographic description of finite coupling

Science.gov (United States)

Konoplya, R. A.; Zhidenko, A.

2017-09-01

Here we shall show that there is no other instability for the Einstein-Gauss-Bonnet-anti-de Sitter (AdS) black holes, than the eikonal one and consider the features of the quasinormal spectrum in the stability sector in detail. The obtained quasinormal spectrum consists from the two essentially different types of modes: perturbative and non-perturbative in the Gauss-Bonnet coupling α. The sound and hydrodynamic modes of the perturbative branch can be expressed through their Schwazrschild-AdS limits by adding a linear in α correction to the damping rates: ω≈Re ω SAdS -Im ω SAdS(1- α·(( D+1)( D-4) /2 R 2)) i, where R is the AdS radius. The non-perturbative branch of modes consists of purely imaginary modes, whose damping rates unboundedly increase when α goes to zero. When the black hole radius is much larger than the anti-de Sitter radius R, the regime of the black hole with planar horizon (black brane) is reproduced. If the Gauss-Bonnet coupling α (or used in holography λGB) is not small enough, then the black holes and branes suffer from the instability, so that the holographic interpretation of perturbation of such black holes becomes questionable, as, for example, the claimed viscosity bound violation in the higher derivative gravity. For example, D = 5 black brane is unstable at |λGB| > 1 /8 and has anomalously large relaxation time when approaching the threshold of instability.

NONSINGULAR UNIVERSES IN GAUSS–BONNET GRAVITY’S RAINBOW

International Nuclear Information System (INIS)

Hendi, Seyed Hossein; Momennia, Mehrab; Panah, Behzad Eslam; Faizal, Mir

2016-01-01

In this paper, we study the rainbow deformation of Friedmann-Robertson-Walker (FRW) cosmology in both Einstein gravity and Gauss–Bonnet (GB) gravity. We demonstrate that the singularity in FRW cosmology can be removed because of the rainbow deformation of the FRW metric. We obtain the general constraints required for FRW cosmology to be free of singularities. We observe that the inclusion of GB gravity can significantly change the constraints required to obtain nonsingular universes. We use rainbow functions motivated by the hard spectra of gamma-ray bursts to deform FRW cosmology and explicitly demonstrate that such a deformation removes the singularity in FRW cosmology.

NONSINGULAR UNIVERSES IN GAUSS–BONNET GRAVITY’S RAINBOW

Energy Technology Data Exchange (ETDEWEB)

Hendi, Seyed Hossein; Momennia, Mehrab; Panah, Behzad Eslam [Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of); Faizal, Mir [Department of Physics and Astronomy, University of Lethbridge, Lethbridge, AB T1K 3M4 (Canada)

2016-08-20

In this paper, we study the rainbow deformation of Friedmann-Robertson-Walker (FRW) cosmology in both Einstein gravity and Gauss–Bonnet (GB) gravity. We demonstrate that the singularity in FRW cosmology can be removed because of the rainbow deformation of the FRW metric. We obtain the general constraints required for FRW cosmology to be free of singularities. We observe that the inclusion of GB gravity can significantly change the constraints required to obtain nonsingular universes. We use rainbow functions motivated by the hard spectra of gamma-ray bursts to deform FRW cosmology and explicitly demonstrate that such a deformation removes the singularity in FRW cosmology.

The ability of flexible car bonnets to mitigate the consequences of frontal impact with pedestrians

Science.gov (United States)

Stanisławek, Sebastian; Niezgoda, Tadeusz

2018-01-01

The paper presents the results of numerical research on a vehicle representing a Toyota Yaris passenger sedan hitting a pedestrian. A flexible car body is suggested as an interesting way to increase safety. The authors present a simple low-cost bonnet buffer concept that may mitigate the effects of frontal impact. Computer simulation was the method chosen to solve the problem efficiently. The Finite Element Method (FEM) implemented in the LS-DYNA commercial code was used. The testing procedure was based on the Euro NCAP protocol. A flexible bonnet buffer shows its usefulness in preventing casualties in typical accidents. In the best scenario, the HIC15 parameter is only 380 when such a buffer is installed. In comparison, an accident involving a car without any protection produces an HIC15 of 970, which is very dangerous for pedestrians.

Thermodynamics of the Maxwell-Gauss-Bonnet anti-de Sitter black hole with higher derivative gauge corrections

International Nuclear Information System (INIS)

Anninos, Dionysios; Pastras, Georgios

2009-01-01

The local and global thermal phase structure for asymptotically anti-de Sitter black holes charged under an abelian gauge group, with both Gauss-Bonnet and quartic field strength corrections, is mapped out for all parameter space. We work in the grand canonical ensemble where the external electric potential is held fixed. The analysis is performed in an arbitrary number of dimensions, for all three possible horizon topologies - spherical, flat or hyperbolic. For spherical horizons, new metastable configurations are exhibited both for the pure Gauss-Bonnet theory as well as the pure higher derivative gauge theory and combinations thereof. In the pure Gauss-Bonnet theory with negative coefficient and five or more spatial dimensions, two locally thermally stable black hole solutions are found for a given temperature. Either one or both of them may be thermally favored over the anti-de Sitter vacuum - corresponding to a single or a double decay channel for the metastable black hole. Similar metastable configurations are uncovered for the theory with pure quartic field strength corrections, as well combinations of the two types of corrections, in three or more spatial dimensions. Finally, a secondary Hawking-Page transition between the smaller thermally favored black hole and thermal anti-de Sitter space is observed when both corrections are turned on and their couplings are both positive.

Lower Charles River Bathymetry: 108 Years of Fresh Water

Science.gov (United States)

Yoder, M.; Sacarny, M.

2017-12-01

The Lower Charles River is a heavily utilized urban river that runs between Cambridge and Boston in Massachusetts. The recreational usage of the river is dependent on adequate water depths, but there have been no definitive prior studies on the sedimentation rate of the Lower Charles River. The river transitioned from tidal to a freshwater basin in 1908 due to the construction of the (old) Charles River Dam. Water surface height on the Lower Charles River is maintained within ±1 foot through controlled discharge at the new Charles River Dam. The current study area for historical comparisons is from the old Charles River Dam to the Boston University Bridge. This study conducted a bathymetric survey of the Lower Charles River, digitized three prior surveys in the study area, calculated volumes and depth distributions for each survey, and estimated sedimentation rates from fits to the volumes over time. The oldest chart digitized was produced in 1902 during dam construction deliberations. The average sedimentation rate is estimated as 5-10 mm/year, which implies 1.8-3.5 feet sedimentation since 1908. Sedimentation rates and distributions are necessary to develop comprehensive management plans for the river and there is evidence to suggest that sedimentation rates in the shallow upstream areas are higher than the inferred rates in the study area.

Eneseotsingutee / Jean-Charles Hue ; intervjueerinud Reet Varblane

Index Scriptorium Estoniae

Hue, Jean-Charles, 1968-

2011-01-01

Tallinna Kunstihoone galeriis on 12. juunini 2011 vaadata prantsuse videokunstniku Jean-Charles Hue' näitus "Tattoo Fight" ("Tätorebimine"), kuraator Harry Liivrand. Kunstnikust, kelle emapoolsed sugulased on Prantsusmaa mustlased ehk yéniche'id. Jean-Charles Hue yéniche'itest, nende olukorrast Prantsusmaal, oma loomingust, pikemalt mustlaste teema käsitlemisest

On the Chern-Gauss-Bonnet theorem for the noncommutative 4-sphere

Science.gov (United States)

Arnlind, Joakim; Wilson, Mitsuru

2017-01-01

We construct a differential calculus over the noncommutative 4-sphere in the framework of pseudo-Riemannian calculi, and show that for every metric in a conformal class of perturbations of the round metric, there exists a unique metric and torsion-free connection. Furthermore, we find a localization of the projective module corresponding to the space of vector fields, which allows us to formulate a Chern-Gauss-Bonnet type theorem for the noncommutative 4-sphere.

78 FR 35756 - Drawbridge Operation Regulations; Charles River, Boston, MA

Science.gov (United States)

2013-06-14

... Regulations; Charles River, Boston, MA AGENCY: Coast Guard, DHS. ACTION: Notice of temporary deviation from...) Bridge across the Charles River, mile 1.0, at Boston, Massachusetts. Under this temporary deviation the... Metropolitan District Commission (Craigie) Bridge, across the Charles River, mile 1.0, at Boston, Massachusetts...

Area and Entropy Spectrum of Gauss—Bonnet Gravity in de Sitter Space-Times for Black Hole Event Horizon

International Nuclear Information System (INIS)

Chen Qiang; Ren Ji-Rong

2013-01-01

In this paper, we use the modified Hod's treatment and the Kunstatter's method to study the horizon area spectrum and entropy spectrum in Gauss—Bonnet de-Sitter space-time, which is regarded as the natural generalization of Einstein gravity by including higher derivative correction terms to the original Einstein—Hilbert action. The horizon areas have some properties that are very different from the vacuum solutions obtained from the frame of Einstein gravity. With the new physical interpretation of quasinormal modes, the area/entropy spectrum for the event horizon for near-extremal Gauss—Bonnet de Sitter black holes are obtained. Meanwhile, we also extend the discussion of area/entropy quantization to the non-extremal black holes solutions. (general)

Charles et ses images

Directory of Open Access Journals (Sweden)

Anne-Marie Baron

2009-01-01

Full Text Available Charles Bovary est probablement le personnage qui a été le plus transformé par les cinéastes qui ont adapté le roman de Flaubert. Si les premiers adaptateurs l’ont traité en victime, peu à peu, le cinéma a commencé à souligner la dimension néfaste sous-jacente du personnage et à lui faire porter une large part de responsabilité dans la descente aux enfers d’Emma. Depuis Pierre Renoir, touchant et authentique, jusqu’à Gregg Edelman, le mari de Little children qui fantasme sur les photos d’une pin-up virtuelle, en passant par les images plus ou moins pathétiques ou ridicules de Van Heflin, Aribert Wäscher, Alberto Bello, Jean-François Balmer, Farooq Shaikh ou Luis-Miguel Cintra, Charles, plus que tout autre personnage du roman, a subi une incroyable métamorphose en s’ancrant dans la civilisation de chacun des pays et de chacune des décennies successives qui l’ont porté à l’écran.From the 1930s to the present, Charles Bovary is probably the most altered character in the adaptations of Flaubert’s novel. The first directors made a victim of him, but gradually, the cinema began to emphasize his deleterious dimension and attributed to him a large part of the responsibility for Emma’s grief. From Pierre Renoir, touching and authentic, to Gregg Edelman, who fantasizes on a pornographic website in Todd Field’s Little Children, the more or less pathetic or ridiculous portrayals given by Van Heflin, Aribert Wäscher,Alberto Bello, Jean-François Balmer, Farooq Shaikh or Luis-Miguel Cintra, show that more than any other character in the novel, Charles has been submitted to a serious metamorphosis by being interpreted on screen according to each country’s civilization and the successive decades of filming.

Nambu-Goto string with the Gauss-Bonnet term and point-like masses at the ends

Science.gov (United States)

Hadasz, Leszek; Róg, Tomasz

1996-02-01

We investigate classical dynamics of the Nambu-Goto string with Gauss-Bonnet term in the action and point-like masses at the ends in the context of effective QCD string. The configuration of rigidly rotating string is studied and its application to phenomenological description of meson spectroscopy is discussed.

Gauss–Bonnet cosmology with induced gravity and a non-minimally coupled scalar field on the brane

International Nuclear Information System (INIS)

Nozari, Kourosh; Fazlpour, Behnaz

2008-01-01

We construct a cosmological model with a non-minimally coupled scalar field on the brane, where Gauss–Bonnet and induced gravity effects are taken into account. This model has 5D character at both high and low energy limits but reduces to 4D gravity for intermediate scales. While induced gravity is a manifestation of the IR limit of the model, the Gauss–Bonnet term and non-minimal coupling of the scalar field and induced gravity are essentially related to the UV limit of the scenario. We study the cosmological implications of this scenario focusing on the late time behavior of the solutions. In this setup, non-minimal coupling plays the role of an additional fine-tuning parameter that controls the initial density of the predicted finite density big bang. Also, non-minimal coupling has important implications for the bouncing nature of the solutions

Manejo de desechos peligrosos (II fase

Directory of Open Access Journals (Sweden)

Juan Carlos Salas Jiménez

2006-05-01

Full Text Available Este trabajo corresponde a la segunda fase del proyecto de Manejo de Desechos Peligrosos que se generan en los laboratorios del Instituto Tecnológico de Costa Rica (ITCR, el cual continuó con las etapas de implementación de un sistema de gestión de manejo de desechos en los laboratorios de docencia e investigación del ITCR. Las actividades que se desarrollaron fueron: capacitación e implementación de algunas etapas del sistema de gestión, cuantificación y caracterización de los desechos, desarrollo de un programa para el control de inventarios y pruebas de laboratorio para el tratamiento de los desechos peligrosos de mayor volumen. De esta investigación, se obtuvieron los siguientes resultados: 1.Se cuenta con un grupo de funcionarios comprometidos y capacitados para implementar el sistema de gestión. 2. Tres métodos efectivos para los tres desechos que se generan en gran cantidad de masa o volumen. 3. Un sistema de inventarios estandarizados que ha sido instalado en nueve laboratorios de la Sede de Cartago. 4.Una “Guía de manejo de los desechos peligrosos de los laboratorios del ITCR”, que sirva de documento base para los funcionarios de los laboratorios. 5. Una normativa en trámite de aprobación para institucionalizar el Programa de Manejo de desechos peligrosos.

Charles Augustin Coulumb

OpenAIRE

Falomo, L.; Bevilacqua, F.; Montalbetti, Claudia

2000-01-01

E' già stato aggiunto da tempo un altro tassello alla "Galleria dei Personaggi" su Web, quello su Charles Augustin Coulomb. Tale sito, come quello precedente Alessandro Volta, è stato progettato nel Laboratorio di Tecnologie educative del Dipartimento di Fisica "A.Volta" dell'Università di Pavia, e ha visto collaborare ancora una volta tale laboratorio e il CILEA.

75 FR 62469 - Drawbridge Operation Regulations; Charles River, Boston, MA, Maintenance

Science.gov (United States)

2010-10-12

... Operation Regulations; Charles River, Boston, MA, Maintenance AGENCY: Coast Guard, DHS. ACTION: Notice of... Craigie Bridge across the Charles River at mile 1.0, has a vertical clearance of 10.25 feet at normal pool... temporary deviation from the regulation governing the operation of the Craigie Bridge across the Charles...

Black holes, parallelizable horizons, and half-BPS states for the Einstein-Gauss-Bonnet theory in five dimensions

International Nuclear Information System (INIS)

Canfora, Fabrizio; Giacomini, Alex; Troncoso, Ricardo

2008-01-01

Exact vacuum solutions with a nontrivial torsion for the Einstein-Gauss-Bonnet theory in five dimensions are constructed. We consider a class of static metrics whose spacelike section is a warped product of the real line with a nontrivial base manifold endowed with a fully antisymmetric torsion. It is shown that requiring solutions of this sort to exist, fixes the Gauss-Bonnet coupling such that the Lagrangian can be written as a Chern-Simons form. The metric describes black holes with an arbitrary, but fixed, base manifold. It is shown that requiring its ground state to possess unbroken supersymmetries fixes the base manifold to be locally a parallelized three-sphere. The ground state turns out to be half-BPS, which could not be achieved in the absence of torsion in vacuum. The Killing spinors are explicitly found

Índice de manejo de carbono e atributos químicos de Latossolo Vermelho sob diferentes sistemas de manejo

Directory of Open Access Journals (Sweden)

Jolimar Antonio Schiavo

2011-10-01

Full Text Available O objetivo deste trabalho foi avaliar mudanças nos atributos químicos, no estoque de carbono e no índice de manejo de C de um Latossolo Vermelho argiloso, sob diferentes sistemas de manejo. Avaliou-se o solo sob sistemas de manejo com diferentes históricos de uso, sob as seguintes coberturas: Zea mays, Urochloa decumbens e Panicum maximum cv. Tanzania. Como testemunha, avaliou-se área sob vegetação de cerrado. Foram coletadas amostras compostas das camadas de solo de 0-5, 5-10 e 10-20 cm. Os teores de fósforo diminuíram com a profundidade, e os maiores valores foram observados na área com P. maximum. Na área com milho, observaram-se maiores valores de K+, Ca++, Mg++, CTC, e de soma e saturação por bases. O teor de C orgânico total do solo (COT foi maior sob cerrado e menor sob cobertura com P. maximum, à profundidade de 5-10 cm. Os maiores estoques de COT, carbono nas frações particuladas (C-MOP e nas frações associadas à fase mineral do solo ocorreram na área com U. decumbens, o que promoveu maiores índices de labilidade e de manejo de C, similares aos da vegetação de cerrado. Em todas as coberturas, a labilidade da matéria orgânica do solo diminuiu com o aumento da profundidade. A fração C-MOP apresenta maior sensibilidade às alterações de manejo e relaciona-se ao COT.

Kink-antikink, trapping bags and five-dimensional Gauss-Bonnet gravity

CERN Document Server

Giovannini, Massimo

2006-01-01

Five-dimensional Gauss-Bonnet gravity, with one warped extra-dimension, allows classes of solutions where two scalar fields combine either in a kink-antikink system or in a trapping bag configuration. While the kink-antikink system can be interpreted as a pair of gravitating domain walls with opposite topological charges, the trapping bag solution consists of a domain wall supplemented by a non-topological defect. In both classes of solutions, for large absolute values of the bulk coordinate (i.e. far from the core of the defects), the geometry is given by five-dimensional anti-de Sitter space.

Cáncer: cuidado continuo y manejo paliativo

OpenAIRE

Velasco V. Maritza, Dra.

2013-01-01

El paciente con cáncer terminal requiere de cuidados continuos con manejo especializado de profesionales entrenados en manejo de síntomas y emociones. Se presenta el desarrollo de los cuidados paliativos en sus comienzos en Inglaterra y en nuestro país. Los equipos de trabajo deben ser multidisciplinarios con desarrollo de equipos domiciliarios que faciliten el cuidado de los pacientes rodeados de sus familias. Se analizan síntomas más frecuentes y sus tratamientos.

Desenvolvimento inicial do milho após diferentes manejos de nabo forrageiro

Directory of Open Access Journals (Sweden)

Rafael Heinz

2013-07-01

Full Text Available O nabo forrageiro tem sido utilizado como cobertura vegetal, entretanto, pouco se sabe sobre o manejo adequado desta espécie e seus efeitos sobre a cultura seguinte. Nesse sentido, objetivou-se neste trabalho avaliar o desenvolvimento inicial da cultura do milho após diferentes manejos do nabo forrageiro. O experimento foi realizado em Dourados-MS, em delineamento de blocos casualizados, com quatro repetições. Os tratamentos foram constituídos por quatro manejos do nabo forrageiro antecedendo a semeadura do milho: aplicação de herbicida três dias antes da semeadura (DS, aplicação de herbicida seis DS, manejo com Triton® três DS, manejo com Triton® seis DS e um tratamento sem a cobertura vegetal de nabo forrageiro. Foram realizadas avaliações de porcentagem de emergência acumulada, altura de plantas, teor de clorofila, área foliar e matéria seca das plantas de milho. O desenvolvimento inicial da cultura do milho é afetado pelo manejo do nabo forrageiro e a semeadura do milho deve ser realizada após seis dias do manejo do nabo forrageiro, seja por herbicida ou pelo desintegrador.

Instability of black holes with a Gauss-Bonnet term

International Nuclear Information System (INIS)

Ahn, Wha-Keun; Gwak, Bogeun; Lee, Wonwoo; Lee, Bum-Hoon

2015-01-01

We investigate the fragmentation instability of hairy black holes in the theory with a Gauss-Bonnet (GB) term in asymptotically flat spacetime. Our approach is through the non-perturbative fragmentation instability. By this approach, we investigate whether the initial black hole can be broken into two black holes by comparing the entropy of the initial black hole with the sum of those of two fragmented black holes. The relation between the black hole instability and the GB coupling with dilaton hair are presented. We describe the phase diagrams with respect to the mass of the black hole solutions and coupling constants. We find that a perturbatively stable black hole can be unstable under fragmentation. (orig.)

Hydrodynamics dual to Einstein-Gauss-Bonnet gravity: all-order gradient resummation

Energy Technology Data Exchange (ETDEWEB)

Bu, Yanyan; Lublinsky, Michael; Sharon, Amir [Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105 (Israel)

2015-06-24

Relativistic hydrodynamics dual to Einstein-Gauss-Bonnet gravity in asymptotic AdS{sub 5} space is under study. To linear order in the amplitude of the fluid velocity and temperature, we derive the fluid’s stress-energy tensor via an all-order resummation of the derivative terms. Each order is accompanied by new transport coefficients, which all together could be compactly absorbed into two functions of momenta, referred to as viscosity functions. Via inverse Fourier transform, these viscosities appear as memory functions in the constitutive relation between components of the stress-energy tensor.

Cáncer: cuidado continuo y manejo paliativo

Directory of Open Access Journals (Sweden)

Velasco V. Maritza, Dra.

2013-07-01

Full Text Available El paciente con cáncer terminal requiere de cuidados continuos con manejo especializado de profesionales entrenados en manejo de síntomas y emociones. Se presenta el desarrollo de los cuidados paliativos en sus comienzos en Inglaterra y en nuestro país. Los equipos de trabajo deben ser multidisciplinarios con desarrollo de equipos domiciliarios que faciliten el cuidado de los pacientes rodeados de sus familias. Se analizan síntomas más frecuentes y sus tratamientos.

Charles Darwin 1809-2009.

Science.gov (United States)

van Wyhe, John

2009-02-01

The year 2009 is the bicentenary of the birth of Charles Darwin and the 150th anniversary of the publication of On the Origin of Species. This article briefly surveys his life and work, dispelling some common myths and summarizes Darwin's achievement and legacy at his death in 1882.

Charles Darwin's Botanical Investigations

Science.gov (United States)

Harley, Suzanne M.

2010-01-01

Charles Darwin's botanical studies provide a way to expose students to his work that followed the publication of "On the Origin of Species." We can use stories from his plant investigations to illustrate key concepts in the life sciences and model how questions are asked and answered in science.

76 FR 21889 - Lasky, Charles D.; Notice of Filing

Science.gov (United States)

2011-04-19

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. ID-4962-007] Lasky, Charles D.; Notice of Filing Take notice that on April 12, 2011, Charles D. Lasky submitted for filing an... the Commission's Rules of Practice and Procedure (18 CFR 385.211, 385.214). Protests will be...

78 FR 61003 - Endangered and Threatened Wildlife and Plants; Endangered Species Status for the Florida Bonneted...

Science.gov (United States)

2013-10-02

... development and agriculture have impacted the Florida bonneted bat and are expected to further curtail its... birth and leave young in the roost while they make multiple foraging excursions to support lactation... appear in spring and summer, generally with only one or two births within the colony per year (S. Trokey...

75 FR 38411 - Drawbridge Operation Regulations; Charles River, Boston, MA, Public Event

Science.gov (United States)

2010-07-02

... Operation Regulations; Charles River, Boston, MA, Public Event AGENCY: Coast Guard, DHS. ACTION: Notice of..., telephone 202-366-9826. SUPPLEMENTARY INFORMATION: The Craigie Bridge, across the Charles River at mile 1.0... elevation above the Charles River Dam. The existing drawbridge operation regulations are listed at 33 CFR...

Identità e riconoscimento in Charles Taylor

Directory of Open Access Journals (Sweden)

Francesca Caputo

2013-06-01

Full Text Available The model of the politic of difference, proposed by Charles Taylor, in the wake of a conception of liberalism ‘hospitable’, unfolds in a journey aimed to comply with the ontological dimensions of the dignity of different cultures, of cultural traditions and ways of life. Being a self, constructed in terms of dialogue and dialectic of mutual recognition between cultures, refers, in the Charles Taylor’s reflection, to the safeguarding of single, intersubjective or common meanings of specific social, moral, narrative spaces.

Estilos de manejo de conflictos, inteligencia emocional y desarrollo moral

OpenAIRE

Villamediana, Jenely; Donado, Antonio; Zerpa, Carlos Enrique

2015-01-01

Esta investigación contrastó las relaciones entre estilos de manejo de conflictos, inteligencia emocional y desarrollo moral en estudiantes de gerencia venezolanos a través de un diagrama de rutas. Se empleó el Inventario de Estilos de Manejo del Conflicto (ROCI-II), el Inventario de Inteligencia Emocional (IIESS-R) y el Test de Definición de Criterios Morales (DIT). El modelo de rutas resultó parcialmente válido puesto que el estilo de manejo de conflicto integrador es predicho solo por el m...

Neuropsychiatry of complex visual hallucinations.

Science.gov (United States)

Mocellin, Ramon; Walterfang, Mark; Velakoulis, Dennis

2006-09-01

To describe the phenomenology and pathophysiology of complex visual hallucinations (CVH) in various organic states, in particular Charles Bonnet syndrome and peduncular hallucinosis. Three cases of CVH in the setting of pontine infarction, thalamic infarction and temporoparietal epileptiform activity are presented and the available psychiatric, neurological and biological literature on the structures of the central nervous system involved in producing hallucinatory states is reviewed. Complex visual hallucinations can arise from a variety of processes involving the retinogeniculocalcarine tract, or ascending brainstem modulatory structures. The cortical activity responsible for hallucinations results from altered or reduced input into these regions, or a loss of ascending inhibition of their afferent pathways. A significant degree of overlaps exists between the concepts of Charles Bonnet syndrome and peduncular hallucinosis. The fluidity of these eponymous syndromes reduces their validity and meaning, and may result in an inappropriate attribution of the underlying pathology. An understanding of how differing pathologies may produce CVH allows for the appropriate tailoring of treatment, depending on the site and nature of the lesion and content of perceptual disturbance.

Visual hallucinations caused by Charles Bonnet Syndrome: A case ...

African Journals Online (AJOL)

had no cognitive impairment and was fully aware of the ... eration. Ms P's main complaint was visual hallucinations. ... brother in front of her eyes. She also displayed ... her would seem to develop a full beard. .... Beta blocking agents. 4.

Quemaduras faciales: “manejo inicial y tratamiento”

OpenAIRE

Álvaro Cuadra, C.; José Luis Piñeros, B.; Ricardo Roa, G.

2010-01-01

Las quemaduras faciales constituyen un grupo dentro de las quemaduras consideradas como en zona especial dada las potenciales secuelas estéticas y funcionales que pueden resultar de su tratamiento, por este motivo, un adecuado manejo reducirá estos riesgos. La cara posee una rica irrigación de tal forma que el manejo deberá ser más conservador que en otras zonas del cuerpo. Las quemaduras superficiales requieren de un tratamiento basado en ungüentos antibióticos y cobertura con apósitos sinté...

Phantom-like behavior of a DGP-inspired Scalar-Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Nozari, Kourosh; Azizi, Tahereh; Setare, M.R.

2009-01-01

We study the phantom-like behavior of a DGP-inspired braneworld scenario where curvature correction on the brane is taken into account. We include a possible modification of the induced gravity on the brane by incorporating higher order curvature terms of Gauss-Bonnet type. We investigate the cosmological implications of the model and we show that the normal branch of the scenario self-accelerates in this modified scenario without introducing any dark energy component. Also, a phantom-like behavior can be realized in this model without introducing any phantom field that suffers from serious difficulties such as violation of the null energy condition

Casimir Energy of the Nambu-Goto String with Gauss-Bonnet Term and Point-Like Masses at the Ends

Science.gov (United States)

Hadasz, Leszek

1999-09-01

We calculate the Casimir energy of the rotating Nambu-Goto string with the Gauss-Bonnet term in the action and point-like masses at the ends. This energy turns out to be negative for every values of the parameters of the model.

Casimir Energy of the Nambu-Goto String with Gauss-Bonnet Term and Point-Like Masses at the Ends

International Nuclear Information System (INIS)

Hadasz, L.

1999-01-01

We calculate the Casimir energy of the rotating Nambu-Goto string with the Gauss-Bonnet term in the action and point-like masses at the ends. This energy turns out to be negative for every values of the parameters of the model. (author)

Charles Peyrou: 1918-2003

CERN Multimedia

2003-01-01

Charles Peyrou, who was one of the outstanding personalities at CERN for thirty years, passed away on 6 April 2003. Born in Oloron-Sainte-Marie (France) on 18 May 1918, Charles Peyrou studied at the Ecole Polytechnique, where he attended the first class given by Louis Leprince-Ringuet in 1936. Here, he was part of the small group of enthusiastic physicists who took part in the first cosmic ray experiments. In 1938, the group built its first chamber, a large Wilson chamber in a magnetic field, operating with Geiger counters. After the war, following his appointment as chief engineer of one of the large national technical institutes known as the Corps de l'Etat, he was detached to his old laboratory to resume research on cosmic rays, and a system of two superimposed cloud chambers was set up at the Pic du Midi. This device proved very effective in the study of the strange particles that were starting to be detected at that time. Here, for example, the disintegration of the K meson into a muon and a neutrino wa...

Quemaduras faciales: “manejo inicial y tratamiento”

Directory of Open Access Journals (Sweden)

Dr. C. Álvaro Cuadra

2010-01-01

Full Text Available Las quemaduras faciales constituyen un grupo dentro de las quemaduras consideradas como en zona especial dada las potenciales secuelas estéticas y funcionales que pueden resultar de su tratamiento, por este motivo, un adecuado manejo reducirá estos riesgos. La cara posee una rica irrigación de tal forma que el manejo deberá ser más conservador que en otras zonas del cuerpo. Las quemaduras superficiales requieren de un tratamiento basado en ungüentos antibióticos y cobertura con apósitos sintéticos transitorios en espera de epidermización. En quemaduras faciales profundas el tratamiento consistirá en escarectomía química y quirúrgica una vez definida la quemadura y su posterior cobertura con tejido autólogo o sustitutos dérmicos definitivos respetando las unidades estético-funcionales de la cara. Este grupo de quemadura luego de la primera atención deberá ser derivada a un centro de quemados para su manejo integral.

Some exact solutions with torsion in 5D Einstein-Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Canfora, F.; Giacomini, A.; Willison, S.

2007-01-01

Exact solutions with torsion in Einstein-Gauss-Bonnet gravity are derived. These solutions have a cross product structure of two constant curvature manifolds. The equations of motion give a relation for the coupling constants of the theory in order to have solutions with nontrivial torsion. This relation is not the Chern-Simons combination. One of the solutions has an AdS 2 xS 3 structure and is so the purely gravitational analogue of the Bertotti-Robinson space-time where the torsion can be seen as the dual of the covariantly constant electromagnetic field

Ricci-Gauss-Bonnet holographic dark energy

Science.gov (United States)

Saridakis, Emmanuel N.

2018-03-01

We present a model of holographic dark energy in which the infrared cutoff is determined by both the Ricci and the Gauss-Bonnet invariants. Such a construction has the significant advantage that the infrared cutoff, and consequently the holographic dark energy density, does not depend on the future or the past evolution of the universe, but only on its current features, and moreover it is determined by invariants, whose role is fundamental in gravitational theories. We extract analytical solutions for the behavior of the dark energy density and equation-of-state parameters as functions of the redshift. These reveal the usual thermal history of the universe, with the sequence of radiation, matter and dark energy epochs, resulting in the future to a complete dark energy domination. The corresponding dark energy equation-of-state parameter can lie in the quintessence or phantom regime, or experience the phantom-divide crossing during the cosmological evolution, and its asymptotic value can be quintessencelike, phantomlike, or be exactly equal to the cosmological-constant value. Finally, we extract the constraints on the model parameters that arise from big bang nucleosynthesis.

Charles River Crossing

Science.gov (United States)

2012-04-06

duration, deck sections will be prefabricated off-site and delivered just-in-time for assembly and installation. The schedule assumes that the parts of...on one side (the side which abuts the existing bridges) there will be the appearance that the new bridges cantilever off the existing bridges. (See...many events that takes place on the Charles River such as crew racings and the “Head of the Charles”. Prefabricated off 19  ANCHORAGE GROUP, LTD

Spontaneous Scalarization of Black Holes and Compact Stars from a Gauss-Bonnet Coupling.

Science.gov (United States)

Silva, Hector O; Sakstein, Jeremy; Gualtieri, Leonardo; Sotiriou, Thomas P; Berti, Emanuele

2018-03-30

We identify a class of scalar-tensor theories with coupling between the scalar and the Gauss-Bonnet invariant that exhibit spontaneous scalarization for both black holes and compact stars. In particular, these theories formally admit all of the stationary solutions of general relativity, but these are not dynamically preferred if certain conditions are satisfied. Remarkably, black holes exhibit scalarization if their mass lies within one of many narrow bands. We find evidence that scalarization can occur in neutron stars as well.

Casimir energy of the Nambu-Goto string with Gauss-Bonnet term and point-like masses at the ends

OpenAIRE

Hadasz, Leszek

1999-01-01

We calculate (using zeta function regularization) the Casimir energy of the rotating Nambu-Goto string with the Gauss-Bonnet term in the action and point-like masses at the ends. The resulting value turns out to be negative for all values of the parameters of the model.

Ghosts in the self-accelerating DGP branch with Gauss–Bonnet effect

Energy Technology Data Exchange (ETDEWEB)

Liu, Yen-Wei; Izumi, Keisuke; Bouhmadi-López, Mariam; Chen, Pisin

2015-06-01

The Dvali–Gabadadze–Porrati brane-world model provides a possible approach to address the late-time cosmic acceleration. However, it has subsequently been pointed out that a ghost instability will arise on the self-accelerating branch. Here, we carefully investigate whether this ghost problem could be possibly cured by introducing the Gauss–Bonnet term in the five-dimensional bulk action, a natural generalization to the Dvali–Gabadadze–Porrati model. Our analysis is carried out for a background where a de Sitter brane is embedded in an anti–de Sitter bulk. Our result shows that the ghost excitations cannot be avoided even in this modified model.

Letters of Second Lieutenant Charles Wesley Chapman, Jr. December 19, 1894 - May 3, 1918

Science.gov (United States)

2016-04-01

that every possible channel of communication will be utilized to ascertain the whereabouts of your son. The personal effects of 2nd. Lieut. Charles W...AIR UNIVERSITY AIR FORCE RESEARCH INSTITUTE Letters of Second Lieutenant Charles Wesley Chapman, Jr. December 19, 1894–May 3, 1918 Air Force...in-Publication Data Chapman, Charles Wesley, Jr., 1894–1918. Letters of Second Lieutenant Charles Wesley Chapman, Jr., December 19, 1894–May 3, 1918

MANEJO DE LOS TUMORES DE HIPÓFISIS

Directory of Open Access Journals (Sweden)

Dr. David Rojas

2017-05-01

Full Text Available Los tumores hipofisiarios son un conjunto de lesiones que ocupan la silla turca, siendo el adenoma hipofisiario por lejos la lesión más frecuente. Los adenomas hipofisiarios se manifiestan clínicamente por compresión de las estructuras vecinas y por hiper o hipofunción hormonal. Dependiendo de estas características, su manejo puede ser variable desde la observación, pasando por el manejo médico y la cirugía. En la siguiente monografía se analizará los principales aspectos clínicos, del diagnóstico y tratamiento de estas lesiones.

Gustav Charles Bonaventure Chancel

OpenAIRE

Wisniak, Jaime

2013-01-01

Gustave Charles Bonaventure Chancel (1822-1890) worked on problems related to analytical chemistry, wine industry, and organic chemistry. His main findings were on the subject of ketones, their nature, reactions, and derivatives. To his credit are the discovery or synthesis of 4-heptanone, butyraldehyde, butyronitrile, valeraldehyde, nitroalkyl acids, benzophenone, phenylurea, diphenylurea, double esters, benzenesulfonyl chloride, n-propanol, etc. His discoveries helped in the acceptance of G...

Charles River Residual Designation: Executive Summary

Science.gov (United States)

Read an executive summary of the Record of Decision's preliminary decision by the Regional Administrator of EPA Region 1 that storm water permits are needed to address serious water quality problems in the Charles River.

Like grandfather, like grandson: Erasmus and Charles Darwin on evolution.

Science.gov (United States)

Smith, C U M

2010-01-01

Last year (2009) marked the bicentenary of Charles Darwin's birth and the sesquicentenary of The Origin of Species. This article examines the influence of Erasmus Darwin on Charles's evolutionary thought and shows how, in many ways, Erasmus anticipated his much better-known grandson. It discusses the similarity in the mindsets of the two Darwins, asks how far the younger Darwin was exposed to the elder's evolutionary thought, examines the similarities and differences in their theories of evolution, and ends by showing the surprising similarity between their theories of inheritance. Erasmus's influence on Charles is greater than customarily acknowledged, and now is an opportune time to bring the grandfather out from behind the glare of his stellar grandson.

[Treatable diseases of the nervous system with cataract formation].

Science.gov (United States)

Baumgartner, R W; Waespe, W

1993-02-01

The detection of a cataract in combination with a neurological deficit may provide the physician with important diagnostic help. But a minority of underlying diseases (angiokeratoma corporis diffusum, cerebrotendinous xanthomatosis, diabetes mellitus, galactosemia, hypocalcemia, Refsum's disease, Wilson's disease; Charles Bonnet syndrome; relapsing Perichondritis; adverse effects of medication and intoxications) can be treated causally. Therefore they are summed up and discussed in this paper.

Manejo perioperatorio de tumores intracraneales: rol del neurocirujano

OpenAIRE

C. Polo-Torres; H.R. Alvis-Miranda; R. Villa-Delgado; L.R. Moscote-Salazar

2013-01-01

El manejo perioperatorio de los pacientes con tumores cerebrales es un reto para el neurocirujano y todo el equipo quirúrgico. El médico debe considerar factores como el tipo de tumor, la extensión de la enfermedad, el tratamiento recibido, la presencia de comorbilidades y el pronóstico de la patología. La ejecución correcta de todos los aspectos implicados en el manejo perioperatorio en pacientes con tumores intracraneales contribuirá a prolongar la vida y a mejorar la calidad de vida de los...

Effects of salinity variations on CODAR ranges during the 2016 Bonnet Carré Spillway Opening

Science.gov (United States)

Howden, S. D.; Diercks, A. R.; Hode, L. E.; Cambazoglu, M. K.; Martin, K. M.

2017-12-01

On January 10, 2016 the Bonnet Carré Spillway was opened to relieve flooding on the Mississippi River, diverting river water into Lake Pontchartrain and then through the western Mississippi Sound. As part of the response to understand the effects of the spillway opening on the Mississippi Sound, a pair of 25 MHz CODAR SeaSondes were deployed on the coast of the western Mississippi Sound to monitor surface currents. This presented the additional opportunity to run a natural experiment on the effect of salinity on the range of CODAR signals. During the spillway event, salinities in the CODAR coverage area, as measured by monitoring stations operated by a partnership between the Mississippi Department of Marine Resources and the United States Geological Survey in the Sound ranged from over 30 to less than 2. Ranges from the CODAR stations were significantly correlated with these salinities. Additionally, the Naval Coastal Ocean Model output, run with real-time river input plus the Bonnet Carré Spillway freshwater input, was available for the analyzes for the spillway event time frame. The observations and modeling were used to investigate the role of salinity on SeaSonde range and how well those variations agree with theory.

Manejo de la falla respiratoria catastrófica en el adulto

Directory of Open Access Journals (Sweden)

Dr. Méndez R. Felipe

2011-05-01

Full Text Available El SDRA severo es un síndrome clínico de relativa frecuencia en la unidades críticas y de elevada morbi-mortalidad, la que no ha sido modificada significativamente a pesar de los avances en la investigación clínica. Un conocimiento profundo de su fisiopatología y las condiciones particulares de cada caso permiten un manejo adecuado. Un número importante de estrategias de manejo han sido investigadas, con variable resultado, pero es improbable que una sola de ellas conduzca a resultados clínicos exitosos. Al revés, una combinación juiciosa e informada de las diferentes alternativas terapéuticas disponibles es la única opción conocida hoy día para el manejo de estos pacientes. La transferencia precoz de estos casos a centros de referencia con experiencia y equipamiento en el manejo de esta patología puede salvar vidas.

76 FR 15214 - Special Local Regulations for Marine Events; Potomac River, Charles County, MD

Science.gov (United States)

2011-03-21

...-AA08 Special Local Regulations for Marine Events; Potomac River, Charles County, MD AGENCY: Coast Guard... for Marine Events; Potomac River, Charles County, MD'' in the Federal Register (76 FR 1381). We... follows: Sec. 100.35-T05-1113 Special Local Regulations for Marine Events; Potomac River, Charles County...

Evasion of No-Hair Theorems and Novel Black-Hole Solutions in Gauss-Bonnet Theories.

Science.gov (United States)

Antoniou, G; Bakopoulos, A; Kanti, P

2018-03-30

We consider a general Einstein-scalar-Gauss-Bonnet theory with a coupling function f(ϕ). We demonstrate that black-hole solutions appear as a generic feature of this theory since a regular horizon and an asymptotically flat solution may be easily constructed under mild assumptions for f(ϕ). We show that the existing no-hair theorems are easily evaded, and a large number of regular black-hole solutions with scalar hair are then presented for a plethora of coupling functions f(ϕ).

Evasion of No-Hair Theorems and Novel Black-Hole Solutions in Gauss-Bonnet Theories

Science.gov (United States)

Antoniou, G.; Bakopoulos, A.; Kanti, P.

2018-03-01

We consider a general Einstein-scalar-Gauss-Bonnet theory with a coupling function f (ϕ ) . We demonstrate that black-hole solutions appear as a generic feature of this theory since a regular horizon and an asymptotically flat solution may be easily constructed under mild assumptions for f (ϕ ). We show that the existing no-hair theorems are easily evaded, and a large number of regular black-hole solutions with scalar hair are then presented for a plethora of coupling functions f (ϕ ).

Charles Darwin i 2009

DEFF Research Database (Denmark)

Kjærgaard, Peter C.

2009-01-01

Charles Darwin blev født d. 12. februar 1809. Hans mest berømte bog, 'Om arternes oprindelse', udkom d. 24. november 1859. Det gør 2009 til noget ganske særligt for både Darwin og evolutionsteorien. Det er nemlig i år både Darwins 200-års fødselsdag og 150-års jubilæet for en af de mest...

77 FR 38085 - Importer of Controlled Substances; Notice of Application; Cambrex Charles City, Inc.

Science.gov (United States)

2012-06-26

... Application; Cambrex Charles City, Inc. Pursuant to Title 21 Code of Federal Regulations 1301.34 (a), this is notice that on May 4, 2011, Cambrex Charles City, Inc., 1205 11th Street, Charles City, Iowa 50616-3466... II are, and will continue to be, required to demonstrate to the Deputy Assistant Administrator...

The Lake Charles CCS Project

Energy Technology Data Exchange (ETDEWEB)

Doug Cathro

2010-06-30

The Lake Charles CCS Project is a large-scale industrial carbon capture and sequestration (CCS) project which will demonstrate advanced technologies that capture and sequester carbon dioxide (CO{sub 2}) emissions from industrial sources into underground formations. Specifically the Lake Charles CCS Project will accelerate commercialization of large-scale CO{sub 2} storage from industrial sources by leveraging synergy between a proposed petroleum coke to chemicals plant (the LCC Gasification Project) and the largest integrated anthropogenic CO{sub 2} capture, transport, and monitored sequestration program in the U.S. Gulf Coast Region. The Lake Charles CCS Project will promote the expansion of EOR in Texas and Louisiana and supply greater energy security by expanding domestic energy supplies. The capture, compression, pipeline, injection, and monitoring infrastructure will continue to sequester CO{sub 2} for many years after the completion of the term of the DOE agreement. The objectives of this project are expected to be fulfilled by working through two distinct phases. The overall objective of Phase 1 was to develop a fully definitive project basis for a competitive Renewal Application process to proceed into Phase 2 - Design, Construction and Operations. Phase 1 includes the studies attached hereto that will establish: the engineering design basis for the capture, compression and transportation of CO{sub 2} from the LCC Gasification Project, and the criteria and specifications for a monitoring, verification and accounting (MVA) plan at the Hastings oil field in Texas. The overall objective of Phase 2, provided a successful competitive down-selection, is to execute design, construction and operations of three capital projects: (1) the CO{sub 2} capture and compression equipment, (2) a Connector Pipeline from the LLC Gasification Project to the Green Pipeline owned by Denbury and an affiliate of Denbury, and (3) a comprehensive MVA system at the Hastings oil field.

Charles Darwin in the Andes

Science.gov (United States)

Bizzo, Nelio; Bizzo, Luis Eduardo Maestrelli

2006-01-01

Considering geological time as an important epistemological obstacle to the construction of ideas on biological evolution, a study was carried out on the so-called "Darwin Papers". The conclusion was that Charles Darwin's excursion in the Andes during March-April 1835 was a crucial step in this regard. An expedition was carried out in…

Is there a relation between the 2D Causal Set action and the Lorentzian Gauss-Bonnet theorem?

Science.gov (United States)

Benincasa, Dionigi M. T.

2011-07-01

We investigate the relation between the two dimensional Causal Set action, Script S, and the Lorentzian Gauss-Bonnet theorem (LGBT). We give compelling reasons why the answer to the title's question is no. In support of this point of view we calculate the causal set inspired action of causal intervals in some two dimensional spacetimes: Minkowski, the flat cylinder and the flat trousers.

Is there a relation between the 2D Causal Set action and the Lorentzian Gauss-Bonnet theorem?

International Nuclear Information System (INIS)

Benincasa, Dionigi M T

2011-01-01

We investigate the relation between the two dimensional Causal Set action, S, and the Lorentzian Gauss-Bonnet theorem (LGBT). We give compelling reasons why the answer to the title's question is no. In support of this point of view we calculate the causal set inspired action of causal intervals in some two dimensional spacetimes: Minkowski, the flat cylinder and the flat trousers.

78 FR 64013 - Importer of Controlled Substances; Notice of Application; Cambrex Charles City, Inc.

Science.gov (United States)

2013-10-25

... Application; Cambrex Charles City, Inc. Pursuant to Title 21 Code of Federal Regulations 1301.34(a), this is notice that on July 24, 2013, Cambrex Charles City, Inc., 1205 11th Street, Charles City, Iowa 50616-3466... class of any controlled substance in schedules I or II are, and will continue to be, required to...

Nonsingular solutions and instabilities in Einstein-scalar-Gauss-Bonnet cosmology

Science.gov (United States)

Sberna, Laura; Pani, Paolo

2017-12-01

It is generically believed that higher-order curvature corrections to the Einstein-Hilbert action might cure the curvature singularities that plague general relativity. Here we consider Einstein-scalar-Gauss-Bonnet gravity, the only four-dimensional, ghost-free theory with quadratic curvature terms. For any choice of the coupling function and of the scalar potential, we show that the theory does not allow for bouncing solutions in the flat and open Friedmann universe. For the case of a closed universe, using a reverse-engineering method, we explicitly provide a bouncing solution which is nevertheless linearly unstable in the scalar gravitational sector. Moreover, we show that the expanding, singularity-free, early-time cosmologies allowed in the theory are unstable. These results rely only on analyticity and finiteness of cosmological variables at early times.

Black hole formation in AdS Einstein-Gauss-Bonnet gravity

Energy Technology Data Exchange (ETDEWEB)

Deppe, Nils [Cornell Center for Astrophysics and Planetary Science andDepartment of Physics, Cornell University,122 Sciences Drive, Ithaca, New York 14853 (United States); Kolly, Allison [Department of Atmospheric and Oceanic Sciences, McGill University,805 Sherbrooke Street West, Montréal, Québec H3A 0B9 (Canada); Frey, Andrew R.; Kunstatter, Gabor [Department of Physics and Winnipeg Institute for Theoretical Physics, University of Winnipeg,515 Portage Avenue, Winnipeg, Manitoba R3B 2E9 (Canada)

2016-10-17

AdS spacetime has been shown numerically to be unstable against a large class of arbitrarily small perturbations. In http://dx.doi.org/10.1103/PhysRevLett.114.071102, the authors presented a preliminary study of the effects on stability of changing the local dynamics by adding a Gauss-Bonnet term to the Einstein action. Here we provide further details as well as new results with improved numerical methods. In particular, we elucidate new structure in Choptuik scaling plots. We also provide evidence of chaotic behavior at the transition between immediate horizon formation and horizon formation after the matter pulse reflects from the AdS conformal boundary. Finally, we present data suggesting the formation of naked singularities in spacetimes with ADM mass below the algebraic bound for black hole formation.

Measured and simulated runoff to the lower Charles River, Massachusetts, October 1999-September 2000

Science.gov (United States)

Zarriello, Phillip J.; Barlow, Lora K.

2002-01-01

The lower Charles River, the water body between the Watertown Dam and the New Charles River Dam, is an important recreational resource for the Boston, Massachusetts, metropolitan area, but impaired water quality has affected its use. The goal of making this resource fishable and swimmable requires a better understanding of combined-sewer-overflow discharges, non-combined-sewer-overflow stormwater runoff, and constituent loads. This report documents the modeling effort used to calculate non-combined-sewer-overflow runoff to the lower Charles River. During the 2000 water year, October 1, 1999?September 30, 2000, the U.S. Geological Survey collected precipitation data at Watertown Dam and compiled data from five other precipitation gages in or near the watershed. In addition, surface-water discharge data were collected at eight sites?three relatively homogenous land-use sites, four major tributary sites, and the Charles River at Watertown Dam, which is the divide between the upper and lower watersheds. The precipitation and discharge data were used to run and calibrate Stormwater Management Models developed for the three land-use subbasins (single-family, multi-family, and commercial), and the two tributary subbasins (Laundry and Faneuil Brooks). These calibrated models were used to develop a sixth model to simulate 54 ungaged outfalls to the lower Charles River. Models developed by the U.S. Geological Survey at gaged sites were calibrated with up to 24 storms. Each model was evaluated by comparing simulated discharge against measured discharge for all storms with appreciable precipitation and reliable discharge data. The model-fit statistics indicated that the models generally were well calibrated to peak discharge and runoff volumes. The model fit of the commercial land-use subbasin was not as well calibrated compared to the other models because the measured flows appear to be affected by variable conditions not represented in the model. A separate Stormwater

Manejo de las infecciones respiratorias bacterianas en pediatría

Directory of Open Access Journals (Sweden)

T. Juan Pablo Torres, Dr.

2014-05-01

En el manejo de la faringitis estreptocócica destaca el uso de amoxicilina en una dosis diaria por 10 días. En sinusitis aguda, otitis media aguda y neumonía, la recomendación de tratamiento inicial lo constituye la amoxicilina a dosis de 80–100 mg/kg/día. Se discuten algoritmos de manejo para cada una de estas patologías.

Black hole thermodynamics and negative entropy in de Sitter and anti-de Sitter Einstein-Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Cvetic, Mirjam; Nojiri, Shin'ichi; Odintsov, S.D.

2002-01-01

We investigate the charged Schwarzschild-anti-de Sitter (SAdS) BH thermodynamics in 5d Einstein-Gauss-Bonnet gravity with electromagnetic field. The Hawking-Page phase transitions between SAdS BH and pure AdS space are studied. The corresponding phase diagrams (with critical line defined by GB term coefficient and electric charge) are drawn. The possibility to account for higher derivative Maxwell terms is mentioned. In frames of proposed dS/CFT correspondence it is demonstrated that brane gravity maybe localized similarly to AdS/CFT. SdS BH thermodynamics in 5d Einstein and Einstein-Gauss-Bonnet gravity is considered. The corresponding (complicated) surface counterterms are found and used to get the conserved BH mass, free energy and entropy. The interesting feature of higher derivative gravity is the possibility for negative (or zero) SdS (or SAdS) BH entropy which depends on the parameters of higher derivative terms. We speculate that the appearance of negative entropy may indicate a new type instability where a transition between SdS (SAdS) BH with negative entropy to SAdS (SdS) BH with positive entropy would occur

Is there a relation between the 2D Causal Set action and the Lorentzian Gauss-Bonnet theorem?

Energy Technology Data Exchange (ETDEWEB)

Benincasa, Dionigi M T, E-mail: db1808@ic.ac.uk [Theoretical Physics Group, Blackett Laboratory, Imperial College, Prince Consort Rd., London SW7 2AZ (United Kingdom)

2011-07-08

We investigate the relation between the two dimensional Causal Set action, S, and the Lorentzian Gauss-Bonnet theorem (LGBT). We give compelling reasons why the answer to the title's question is no. In support of this point of view we calculate the causal set inspired action of causal intervals in some two dimensional spacetimes: Minkowski, the flat cylinder and the flat trousers.

33 CFR 80.505 - Cape Henlopen, DE to Cape Charles, VA.

Science.gov (United States)

2010-07-01

... to Cape Charles, VA. (a) A line drawn from the seaward extremity of Indian River Inlet North Jetty to Indian River Inlet South Jetty Light. (b) A line drawn from Ocean City Inlet Light 6, 225° true across... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Cape Henlopen, DE to Cape Charles...

Effect of chronic administration of Tamoxifen on fertility in male bonnet monkeys (Macaca radiata).

Science.gov (United States)

Rao, A J; Ramachandra, S G; Ramesh, V; Krishnamurthy, H N; Jayaraman, S; Gopalakrishnan, K; Juneja, H S

1998-01-01

Administration of Tamoxifen via the Alzet pump at a rate of 50 micrograms hr-1 for 90 days in the adult male bonnet monkeys Macaca radiata had no effect on the serum testosterone concentration determined at 10 AM and 10 PM as well as total sperm count determined at 15-day intervals over a period of 260 days. However, a significant reduction in sperm motility was observed beyond 90 days up until the 225th day. Breeding studies conducted from day 90 to 260 revealed that these males were infertile.

Regular black holes in Einstein-Gauss-Bonnet gravity

Science.gov (United States)

Ghosh, Sushant G.; Singh, Dharm Veer; Maharaj, Sunil D.

2018-05-01

Einstein-Gauss-Bonnet theory, a natural generalization of general relativity to a higher dimension, admits a static spherically symmetric black hole which was obtained by Boulware and Deser. This black hole is similar to its general relativity counterpart with a curvature singularity at r =0 . We present an exact 5D regular black hole metric, with parameter (k >0 ), that interpolates between the Boulware-Deser black hole (k =0 ) and the Wiltshire charged black hole (r ≫k ). Owing to the appearance of the exponential correction factor (e-k /r2), responsible for regularizing the metric, the thermodynamical quantities are modified, and it is demonstrated that the Hawking-Page phase transition is achievable. The heat capacity diverges at a critical radius r =rC, where incidentally the temperature is maximum. Thus, we have a regular black hole with Cauchy and event horizons, and evaporation leads to a thermodynamically stable double-horizon black hole remnant with vanishing temperature. The entropy does not satisfy the usual exact horizon area result of general relativity.

Charles Emile Carré (1863-1909

Directory of Open Access Journals (Sweden)

Juan Aristizábal D.

1993-09-01

Full Text Available El motivo principal para traer al arquitecto Charles E. Carré a Medellín se atribuye básicamente a la construcción de la catedral de Villanueva, en Antioquia. Monsieur Carré, como se le conoció, fue tema, nueva y tristemente, a causa de su inesperada muerte ocurrida en 1909, de las páginas de los diarios locales, quince años después de su partida de la ciudad de Medellín, que en todo momento profesó respeto y admiración y a quien "se le debe [...] el habernos mostrado que [...] el ladrillo cocido no es piedra [...], que cualquier barro cocido no es ladrillo y [...] que en artes de construir no es el renacimiento ni la última ni la mejor de las palabras". A continuación hacemos una relación cronológica de las obras de Charles Carré en Antioquia:

Cosmology of modified Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Li Baojiu; Barrow, John D.; Mota, David F.

2007-01-01

We consider the cosmology where some function f(G) of the Gauss-Bonnet term G is added to the gravitational action to account for the late-time accelerating expansion of the universe. The covariant and gauge invariant perturbation equations are derived with a method which could also be applied to general f(R,R ab R ab ,R abcd R abcd ) gravitational theories. It is pointed out that, despite their fourth-order character, such f(G) gravity models generally cannot reproduce arbitrary background cosmic evolutions; for example, the standard ΛCDM paradigm with Ω DE =0.76 cannot be realized in f(G) gravity theories unless f is a true cosmological constant because it imposes exclusionary constraints on the form of f(G). We analyze the perturbation equations and find that, as in the f(R) model, the stability of early-time perturbation growth puts some constraints on the functional form of f(G), in this case ∂ 2 f/∂G 2 <0. Furthermore, the stability of small-scale perturbations also requires that f not deviate significantly from a constant. These analyses are illustrated by numerically propagating the perturbation equations with a specific model reproducing a representative ΛCDM cosmic history. Our results show how the f(G) models are highly constrained by cosmological data

Vacuum thin shells in Einstein–Gauss–Bonnet brane-world cosmology

Science.gov (United States)

Ramirez, Marcos A.

2018-04-01

In this paper we construct new solutions of the Einstein–Gauss–Bonnet field equations in an isotropic Shiromizu–Maeda–Sasaki brane-world setting which represent a couple of Z 2-symmetric vacuum thin shells splitting from the central brane, and explore the main properties of the dynamics of the system. The matching of the separating vacuum shells with the brane-world is as smooth as possible and all matter fields are restricted to the brane. We prove the existence of these solutions, derive the criteria for their existence, analyse some fundamental aspects or their evolution and demonstrate the possibility of constructing cosmological examples that exhibit this feature at early times. We also comment on the possible implications for cosmology and the relation of this system with the thermodynamic instability of highly symmetric vacuum solutions of Lovelock theory.

Charles Darwin havde et nuanceret syn på dyreforsøg

DEFF Research Database (Denmark)

Alstrup, Aage Kristian Olsen

2015-01-01

Jeg har i en tidligere blog været inde på, hvordan Charles Darwins evolutionsteori har haft betydning for vores valg af forsøgsdyr. Men hvordan så Charles Darwin egentlig selv på dyreforsøg og dyrevelfærd? Faktisk var det et emne, der optog ham dybt. Allerede i 1838, over tyve år før...... offentliggørelsen af Arternes Oprindelse, gjorde han sig et notat om, at mennesket i sin arrogance føler sig hævet over andre skabninger, men at det snarere bør opfatte sig som skabt ud fra dyrene. Disse tanker kom dog først for alvor frem, da Charles Darwin i 1871 offentliggjorde bogen Menneskets Afstamning...

Environmental Education in the Galapagos: 2007 Report to the Charles Darwin Foundation

Science.gov (United States)

Stepath, Carl M.

2007-01-01

Background: "Environmental education in the Galapagos: 2007 report to the Charles Darwin Foundation" is a report to the Charles Darwin Foundation (CDF) about the researchers observations about the status of environmental education in the Galapagos in 2006 and 2007. Purpose: This paper reports on environmental education in the Galapagos…

Charles Darwin and John Herschel

Science.gov (United States)

Warner, B.

2009-11-01

The influence of John Herschel on the philosophical thoughts of Charles Darwin, both through the former's book, Natural Philosophy, and through their meeting in 1836 at the Cape of Good Hope, is discussed. With Herschel having himself speculated on evolution just a few months before he met Darwin, it is probable that he stimulated at least the beginnings of the latter's lifelong work on the subject.

La collégiale de Saint-Bonnet-le-Château (Loire

Directory of Open Access Journals (Sweden)

Bernard Ducouret

2012-04-01

Full Text Available La collégiale de Saint-Bonnet-le-Château est principalement connue pour les peintures murales du XVe siècle qui décorent sa chapelle basse, dont une partie est reproduite au musée des Monuments français, et, à un moindre degré, pour sa bibliothèque qui conserve de nombreux incunables. Son architecture, plus ignorée, n'en est pas moins digne d'intérêt. Nous ne présenterons pas ici l'ensemble de l'édifice, négligeant des éléments remarquables comme le porche sud (cf. plan, au-dessous de la sacr...

Conserved charges for black holes in Einstein-Gauss-Bonnet gravity coupled to nonlinear electrodynamics in AdS space

International Nuclear Information System (INIS)

Miskovic, Olivera; Olea, Rodrigo

2011-01-01

Motivated by possible applications within the framework of anti-de Sitter gravity/conformal field theory correspondence, charged black holes with AdS asymptotics, which are solutions to Einstein-Gauss-Bonnet gravity in D dimensions, and whose electric field is described by nonlinear electrodynamics are studied. For a topological static black hole ansatz, the field equations are exactly solved in terms of the electromagnetic stress tensor for an arbitrary nonlinear electrodynamic Lagrangian in any dimension D and for arbitrary positive values of Gauss-Bonnet coupling. In particular, this procedure reproduces the black hole metric in Born-Infeld and conformally invariant electrodynamics previously found in the literature. Altogether, it extends to D>4 the four-dimensional solution obtained by Soleng in logarithmic electrodynamics, which comes from vacuum polarization effects. Falloff conditions for the electromagnetic field that ensure the finiteness of the electric charge are also discussed. The black hole mass and vacuum energy as conserved quantities associated to an asymptotic timelike Killing vector are computed using a background-independent regularization of the gravitational action based on the addition of counterterms which are a given polynomial in the intrinsic and extrinsic curvatures.

Manejo de la reestenosis intrastent

Directory of Open Access Journals (Sweden)

Boris E. Vesga

2017-12-01

Full Text Available La reestenosis intrastent es la reacumulación de material tisular dentro del lumen de un vaso coronario en el sitio receptor de intervencionismo previo con balón o stent, como consecuencia a una respuesta normal de cicatrización que tiene la pared vascular ante la existencia de daño mecánico. Es el resultado de dos procesos histopatológicos: la hiperplasia neointimal, dada por la migración y proliferación del músculo liso y el depósito de matriz extracelular, y la remodelación vascular. Se manifiesta clínicamente con síntomas de isquemia y hallazgos angiográficos que evidencian reducción de al menos 50% de la luz del vaso previamente tratado con stent. Para el manejo se recomienda la utilización de stent medicados de segunda generación o balones impregnados de medicamento según el tipo de reestenosis a tratar. No se alienta a la utilización de stent o de balón convencionales como única medida para manejo de la reestenosis intrastent.

46 CFR 7.45 - Cape Henlopen, DE to Cape Charles, VA.

Science.gov (United States)

2010-10-01

... 46 Shipping 1 2010-10-01 2010-10-01 false Cape Henlopen, DE to Cape Charles, VA. 7.45 Section 7.45... Atlantic Coast § 7.45 Cape Henlopen, DE to Cape Charles, VA. (a) A line drawn from the easternmost extremity of Indian River Inlet North Jetty to latitude 38°36.5′ N. longitude 75°02.8′ W. (Indian River...

MANEJO INTEGRAL DE LA PARÁLISIS FACIAL

Directory of Open Access Journals (Sweden)

DRA. Susana Benítez S.

2016-01-01

Full Text Available La parálisis facial afecta la musculatura de la mímica facial, generando alteraciones estéticas, funcionales y psicosociales. El manejo multidisciplinario es clave para lograr los mejores resultados, especialmente como apoyo a la cirugía reconstructiva. La estrategia de tratamiento está basada en un enfrentamiento sistemático de acuerdo a las características semiológicas y electromiográficas de cada paciente, lo que permite agruparlos de acuerdo a la reversibilidad y severidad de su patología. Los métodos de reconstrucción quirúrgica pueden ser estáticos o dinámicos (injerto cruzado de nervio sural, colgajo muscular libre con injerto de nervio sural ipsilateral o cruzado y colgajo mini-temporal. Incorporar la terapia física dentro del protocolo quirúrgico puede lograr mayor activación muscular, mayor simetría facial y reducir molestias postoperatorias como el edema facial, manejo de cicatrices, entre otros. Aunque existe reconocimiento sobre el impacto que posee el tratamiento de la parálisis facial, no existe a la fecha amplio consenso sobre cuál es el óptimo manejo de esta condición, y a pesar de los avances reportados durante los últimos años y la cantidad de técnicas propuestas en la literatura, la reanimación facial sigue siendo un desafío en cirugía reparadora.

Charles Darwin: What Else Did He Write?

Science.gov (United States)

Berra, Tim M.

1980-01-01

Lists a number of books written by Charles Darwin, selected to indicate the depth and breadth of Darwin's biological interests. Each entry is described with a short annotation. Also provides a reading list of references about Darwin's life. (CS)

Actualización en el manejo del colesterol hdl bajo

Directory of Open Access Journals (Sweden)

Rigotti R. Attilio, Dr.

2012-11-01

Full Text Available Los niveles plasmáticos bajos de colesterol transportado en las lipoproteínas de alta densidad (HDL constituyen un elemento independiente de riesgo cardiovascular ateroesclerótico. Algunos protocolos clínicos enfocados en el manejo farmacológico de los niveles bajos de colesterol HDL en pacientes de alto riesgo cardiovascular han mostrado resultados favorables. Por otro lado, existen nuevas formulaciones de la niacina, el agente farmacológico disponible más efectivo para el manejo del colesterol HDL bajo, y se están desarrollando nuevos fármacos más potentes para aumentar los niveles plasmáticos de colesterol HDL. En el futuro, nuevos medicamentos que modulen el metabolismo de HDL y demuestren beneficio sobre el control del riesgo cardiovascular ateroesclerótico, podrían mejorar aún más el manejo actual de esta condición patológica que se basa esencialmente en el uso de estatinas.

MODELO DE GESTION DE MANEJO COSTERO INTEGRADO EN EL ECUADOR

Directory of Open Access Journals (Sweden)

Vladimir Soria

2016-04-01

Full Text Available Se ha estudiado el manejo costero integrado como una forma de gobernanza ambiental en la provincia de Santa Elena que incluyen dos aspectos: fortalecimiento institucional y participacion ciudadana. El deficiente control ambiental existente exige un modelo de gestión a escala local basado en tres ejes: el fortalecimiento de las capacidades institucionales de los gobiernos locales; el ordenamiento territorial para una adecuada determinacion y delimitacion de las competenecias en materia ambientak  costera y la participacion ciudadana a nivel del régimen de la comunas en coordinación con los distintos niveles de gobierno. Se propone el estudio delas caracteristicas específicasde cada comua ubicada en la faja costera para implementar en cada una de ella el respectivo modelo de gestion. Tambien se propone la creación de un obeservatorio de manejo costero integrado para medir el avance en manejo costero iuntegrado de la provincia de Santa Elena.

Programa de manejo integral de zonas costeras de Nicaragua (MAIZCo

Directory of Open Access Journals (Sweden)

Fátima Vanegas Zúñiga

2016-03-01

Full Text Available El Plan de Acción para el Manejo de las Zonas Costeras de Nicaragua fue formulado durante la primera fase del programa “Manejo Integral de las Zonas Costeras de Nicaragua” (MAIZCo. La agencia ejecutora de la primera fase fue la Dirección General del Ambiente (DGA del Ministerio del Ambiente y Recursos Naturales (MARENA. Las estrategias y propuestas de acciones inmediatas formuladas en el Plan de Acción están basadas en un marco conceptual y un diagnóstico de las potencialidades y problemática de la Zona Costera. Tanto el marco conceptual como el diagnostico fueron desarrollados en un intenso proceso de interacción con los actores sustantivos. Una serie de entrevistas y talleres a nivel local, regional y nacional fueron organizados. Un primer paso incluyó la definición de los siguientes dos principios guías para el Manejo Integral de las Zonas Costeras en Nicaragua. El objetivo general del plan es facilitar un uso sostenible de los recursos naturales en las zonas Costeras de Nicaragua para el beneficio de toda la sociedad. Además, como objetivos específicos se considera contribuir al crecimiento económico; mantener la integridad de los ecosistemas costeros; contribuir a una distribución equitativa de los bienes y servicios producidos por los recursos naturales; y facilitar un efectivo y eficiente manejo. El diagnóstico de las zonas costeras incluyó: Nicaragua tiene extensivos recursos naturales en el área costera, los cuales podrían –pero no- jugar un substancial rol en el desarrollo social y económico de Nicaragua. La problemática general no es la degradación de los ecosistemas costeros, pero si en general los recursos están subexplotados y los beneficios no están bien distribuidos. Un uso indiscriminado, sin embargo, podría significar en un futuro inmediato la sobreexplotación de ecosistemas específicos (ejemplo: áreas de manglares en la costa Pacífica y especies (ejemplos: la langosta en la costa Atl

Streamflow, water quality, and contaminant loads in the lower Charles River Watershed, Massachusetts, 1999-2000

Science.gov (United States)

Breault, Robert F.; Sorenson, Jason R.; Weiskel, Peter K.

2002-01-01

Streamflow data and dry-weather and stormwater water-quality samples were collected from the main stem of the Charles River upstream of the lower Charles River (or the Basin) and from four partially culverted urban streams that drain tributary subbasins in the lower Charles River Watershed. Samples were collected between June 1999 and September 2000 and analyzed for a number of potential contaminants including nitrate (plus nitrite), ammonia, total Kjeldahl nitrogen, phosphorus, cadmium, chromium, copper, lead, and zinc; and water-quality properties including specific conductance, turbidity, biochemical oxygen demand, fecal coliform bacteria, Entero-coccus bacteria, total dissolved solids, and total suspended sediment. These data were used to identify the major pathways and to determine the magnitudes of contaminants loads that contribute to the poor water quality of the lower Charles River. Water-quality and streamflow data, for one small urban stream and two storm drains that drain subbasins with uniform (greater than 73 percent) land use (including single-family residential, multifamily residential, and commercial), also were collected. These data were used to elucidate relations among streamflow, water quality, and subbasin characteristics. Streamflow in the lower Charles River Watershed can be characterized as being unsettled and flashy. These characteristics result from the impervious character of the land and the complex infrastructure of pipes, pumps, diversionary canals, and detention ponds throughout the watershed. The water quality of the lower Charles River can be considered good?meeting water-quality standards and guidelines?during dry weather. After rainstorms, however, the water quality of the river becomes impaired, as in other urban areas. The poor quality of stormwater and its large quantity, delivered over short periods (hours and days), together with illicit sanitary cross connections, and combined sewer overflows, results in large contaminant

Thermal cracking in Lac du Bonnet granite during slow heating to 205 degrees celsius

International Nuclear Information System (INIS)

Chernis, P.J.; Robertson, P.B.

1993-09-01

Acoustic emissions (AE) were recorded as drill core samples of Lac du Bonnet granite were slowly heated to between 66 and 205 degrees celsius to evaluate the effects of temperature on the properties of rock samples. Longitudinal and shear velocities of the samples were measured, and Young's moduli, shear moduli and Poisson's ratios were calculated. No significant AE activity was detected until temperatures reached approximately 73-80 degrees celsius. Above this 'threshold' temperature, calculated rock properties decreased, and at 205 degrees celsius calculated Young's modulus, shear modulus, and Poisson's ratio were reduced by 30, 26, and 29% respectively

Iron line spectroscopy with Einstein-dilaton-Gauss-Bonnet black holes

Science.gov (United States)

Nampalliwar, Sourabh; Bambi, Cosimo; Kokkotas, Kostas D.; Konoplya, Roman A.

2018-06-01

Einstein-dilaton-Gauss-Bonnet gravity is a well-motivated alternative theory of gravity that emerges naturally from string theory. While black hole solutions have been known in this theory in numerical form for a while, an approximate analytical metric was obtained recently by some of us, which allows for faster and more detailed analysis. Here we test the accuracy of the analytical metric in the context of X-ray reflection spectroscopy. We analyze innermost stable circular orbits (ISCO) and relativistically broadened iron lines and find that both the ISCO and iron lines are determined sufficiently accurately up to the limit of the approximation. We also find that, though the ISCO increases by about 7% as dilaton coupling increases from zero to extremal values, the redshift at ISCO changes by less than 1%. Consequently, the shape of the iron line is much less sensitive to the dilaton charge than expected.

Puesta al día en el manejo de las dislipidemias

Directory of Open Access Journals (Sweden)

Kunstmann F. Sonia, DRA

2012-11-01

Full Text Available Las dislipidemias juegan un rol muy importante en la patogénesis de la enfermedad ateromatosa. El manejo debe basarse en el riesgo individual, con metas de colesterol LDL según las guías internacionalmente aceptadas, que corresponde a colesterol LDL menos de100mg/dl en pacientes con enfermedad ateroesclerótica conocida o de alto riesgo. Los fibratos son drogas de elección en el manejo de las hipertrigliceridemias. Las estatinas han demostrado ser muy eficientes en reducir colesterol total, colesterol LDL y también, aunque en menor grado, en reducir triglicéridos y aumentar colesterol HDL. Están indicadas como primera línea en pacientes de alto riesgo, con enfermedad ateromatosa, o en prevención secundaria. Se discuten otros fármacos en el manejo de las dislipidemias.

Sir Charles Scott Sherrington (1857–1952)

Indian Academy of Sciences (India)

Twentieth century bore witness to remarkable scientists whohave advanced our understanding of the brain. Among them,Sir Charles Scott Sherrington's ideas about the way in whichthe central nervous system operates has continuing relevanceeven today. He received honorary doctorates from twentytwouniversities and ...

Sir Charles Scott Sherrington (1857–1952)

Indian Academy of Sciences (India)

2016-08-26

Aug 26, 2016 ... Twentieth century bore witness to remarkable scientists whohave advanced our understanding of the brain. Among them,Sir Charles Scott Sherrington's ideas about the way in whichthe central nervous system operates has continuing relevanceeven today. He received honorary doctorates from ...

3 CFR - Continuation of the National Emergency With Respect to the Former Liberian Regime of Charles Taylor

Science.gov (United States)

2010-01-01

... to the Former Liberian Regime of Charles Taylor Presidential Documents Other Presidential Documents... of Charles Taylor On July 22, 2004, by Executive Order 13348, the President declared a national... to the former Liberian regime of Charles Taylor, pursuant to the International Emergency Economic...

77 FR 42179 - Safety Zone; Fireworks Display, Potomac River, Charles County, Newburg, MD

Science.gov (United States)

2012-07-18

...]30[sec] W, located at Newburg in Charles County, Maryland (NAD 1983). The temporary safety zone will... 1625-AA00 Safety Zone; Fireworks Display, Potomac River, Charles County, Newburg, MD AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard will establish a safety zone upon...

Compactação causada pelo manejo de plantas invasoras em latossolo vermelho-amarelo cultivado com cafeeiros

Directory of Open Access Journals (Sweden)

Paula Sant'Anna Moreira Pais

2011-12-01

Full Text Available O manejo de plantas invasoras é considerado uma das principais atividades que promovem degradação da estrutura do solo em lavouras cafeeiras, devido à compactação do solo causada pelas operações de controle de plantas invasoras. O objetivo deste estudo foi determinar o modelo de capacidade de suporte de carga para o manejo de plantas invasoras sem capina, bem como, utilizando esse modelo, qual manejo de plantas invasoras causa menor ou maior compactação do solo. Este estudo foi realizado em um Latossolo Vermelho-Amarelo (LVA cultivado com cafeeiros da cutivar Topázio MG 1190 desde 2006, localizado na Fazenda Experimental da EPAMIG, na comunidade Farias, em Lavras-MG. Os manejos de plantas invasoras avaliados foram: na linha de tráfego da entrelinha - grade de discos, herbicida de pós-emergência, herbicida de pré-emergência, roçadora e trincha; e no centro da entrelinha, onde não houve tráfego - amendoim forrageiro (Arachis pintoi, braquiária (Brachiaria decumbens, capina manual, crotalária (Crotalaria juncea e soja (Glicine max L. A amostragem consistiu de duas etapas: uma para determinar o modelo de capacidade de suporte de carga para o manejo de plantas invasoras sem capina; e outra para avaliar a compactação promovida pelos outros manejos de plantas invasoras. A fim de determinar o modelo de capacidade de suporte de carga para o manejo sem capina, foram coletadas no centro da entrelinha 20 amostras com estrutura indeformada nas profundidades de 0-3, 10-13 e 25-28 cm, totalizando 60 amostras. Essas amostras foram submetidas ao ensaio de compressão uniaxial para obter as pressões de pré-consolidação e as umidades volumétricas, que foram usadas para determinar o modelo de capacidade de suporte de carga. Para determinar a compactação causada pelos manejos de plantas invasoras, realizados por meio do controle mecânico, foram coletadas em janeiro de 2010, nas linhas de tráfego das entrelinhas, 180 amostras com

Constructions of legitimacy: the Charles Taylor trial

NARCIS (Netherlands)

Glasius, M.; Meijers, T.

2012-01-01

This article examines the discourses of the prosecution and the defence in the case of Charles Taylor before the Special Court for Sierra Leone. It contributes to current debates about the legitimacy and utility of international criminal justice, which have tended to neglect the examination of

Simple inflationary models in Gauss–Bonnet brane-world cosmology

International Nuclear Information System (INIS)

Okada, Nobuchika; Okada, Satomi

2016-01-01

In light of the recent Planck 2015 results for the measurement of the cosmic microwave background (CMB) anisotropy, we study simple inflationary models in the context of the Gauss–Bonnet (GB) brane-world cosmology. The brane-world cosmological effect modifies the power spectra of scalar and tensor perturbations generated by inflation and causes a dramatic change for the inflationary predictions of the spectral index ( n s ) and the tensor-to-scalar ratio ( r ) from those obtained in the standard cosmology. In particular, the predicted r values in the inflationary models favored by the Planck 2015 results are suppressed due to the GB brane-world cosmological effect, which is in sharp contrast with inflationary scenario in the Randall–Sundrum brane-world cosmology, where the r values are enhanced. Hence, these two brane-world cosmological scenarios are distinguishable. With the dramatic change of the inflationary predictions, the inflationary scenario in the GB brane-world cosmology can be tested by more precise measurements of n s and future observations of the CMB B -mode polarization. (paper)

Nonlinear viscosity in brane-world cosmology with a Gauss–Bonnet term

Science.gov (United States)

Debnath, P. S.; Beesham, A.; Paul, B. C.

2018-06-01

Cosmological solutions are obtained with nonlinear bulk viscous cosmological fluid in the Randall–Sundrum type II (RS) brane-world model with or without Gauss–Bonnet (GB) terms. To describe such a viscous fluid, we consider the nonlinear transport equation which may be used far from equilibrium during inflation or reheating. Cosmological models are explored for both (i) power law and (ii) exponential evolution of the early universe in the presence of an imperfect fluid described by the non-linear Israel and Stewart theory (nIS). We obtain analytic solutions and the complex field equations are also analyzed numerically to study the evolution of the universe. The stability analysis of the equilibrium points of the dynamical system associated with the evolution of the nonlinear bulk viscous fluid in the RS Brane in the presence (or absence) of a GB term are also studied.

Obituary: Charles Latif Hyder, 1930-2004

Science.gov (United States)

White, Oran Richard

2004-12-01

My friend and colleague, Charles Hyder, was a true physicist with a sound intuitive grasp of fundamentals in modern physics and the underlying mathematics. I admired his knowledge of the history of modern physics and quantum mechanics when we discussed contemporary problems in interpreting solar observations. He had the ability to present his ideas clearly and persuasively to both students and his colleagues. His insatiable curiosity about life in general led him to consider the effects of nuclear weapons development on the human race. Appreciation of the biological effects of radioactive materials produced in the course of weapons and power reactor development led him to a more public career beyond traditional research. Charles Hyder was born April 18, 1930 in Albuquerque, New Mexico. He graduated from Albuquerque High School and served in the Air Force during the Korean War. He received a BS and MS in physics from the University of New Mexico (1958, 1960) and a PhD in astrogeophysics at the University of Colorado (1964). His positions included the Department of Astronomy and Institute of Geophysics at UCLA (1964-65), Sacramento Peak Solar Observatory (1965-1970) and the Goddard Space Flight Center (1970-1977). He also taught at the University of New Mexico (1970-1977) and was active on the Solar Maximum Mission science team (1970-1977, 1980-1984). He was married twice with both marriages ending in divorce. He and his first wife Ann had three children (Paul, Roxanne and Querida) and he and his second wife Laurie had a son Niels. Charles Hyder's professional career in solar physics began in 1961 during his graduate studies at the Department of AstroGeophysics of the University of Colorado and continued until 1983 when he chose to follow his convictions to expose the threat of nuclear proliferation. His early research was in the study of the quantum mechanics of polarized light produced in the presence of magnetic fields. Application of this work to interpretation

Dilaton field released under collision of dilatonic black holes with Gauss-Bonnet term

Energy Technology Data Exchange (ETDEWEB)

Gwak, Bogeun [Sejong University, Department of Physics and Astronomy, Seoul (Korea, Republic of); Ro, Daeho [POSTECH, Asia Pacific Center for Theoretical Physics, Pohang, Gyeongbuk (Korea, Republic of)

2017-08-15

We investigate the upper limit of the gravitational radiation released upon the collision of two dilatonic black holes by analyzing the Gauss-Bonnet term. Dilatonic black holes have a dilaton hair coupled with this term. Using the laws of thermodynamics, the upper limit of the radiation is obtained, which reflected the effects of the dilaton hair. The amount of radiation released is greater than that emitted by a Schwarzschild black hole due to the contribution from the dilaton hair. In the collision, most of the dilaton hair can be released through radiation, where the energy radiated by the dilaton hair is maximized when the horizon of one black hole is minimized for a fixed second black hole. (orig.)

New perspective for black hole thermodynamics in Gauss-Bonnet-Born-Infeld massive gravity

International Nuclear Information System (INIS)

Hendi, Seyed Hossein; Li, Gu-Qiang; Mo, Jie-Xiong; Panahiyan, Shahram; Panah, Behzad Eslam

2016-01-01

Following an earlier study regarding Einstein-Gauss-Bonnet-massive black holes in the presence of a Born-Infeld nonlinear electromagnetic field (Hendi, arXiv:1510.00108, 2016), we study thermodynamical structure and critical behavior of these black holes through various methods in this paper. Geometrical thermodynamics is employed to give a picture regarding the phase transition of these black holes. Next, a new method is used to derive critical pressure and radius of the horizon of these black holes. In addition, Maxwell equal area law is employed to study the Van der Waals like behavior of these black holes. Moreover, the critical exponents are calculated and by using Ehrenfest equations, the type of phase transition is determined. (orig.)

New perspective for black hole thermodynamics in Gauss-Bonnet-Born-Infeld massive gravity

Energy Technology Data Exchange (ETDEWEB)

Hendi, Seyed Hossein [Shiraz University, Physics Department and Biruni Observatory, College of Sciences, Shiraz (Iran, Islamic Republic of); Research Institute for Astronomy and Astrophysics of Maragha (RIAAM),Maragha (Iran, Islamic Republic of); Li, Gu-Qiang; Mo, Jie-Xiong [Lingnan Normal University, Institute of Theoretical Physics, Zhanjiang, Guangdong (China); Panahiyan, Shahram [Shiraz University, Physics Department and Biruni Observatory, College of Sciences, Shiraz (Iran, Islamic Republic of); Shahid Beheshti University, Physics Department, Tehran (Iran, Islamic Republic of); Panah, Behzad Eslam [Shiraz University, Physics Department and Biruni Observatory, College of Sciences, Shiraz (Iran, Islamic Republic of)

2016-10-15

Following an earlier study regarding Einstein-Gauss-Bonnet-massive black holes in the presence of a Born-Infeld nonlinear electromagnetic field (Hendi, arXiv:1510.00108, 2016), we study thermodynamical structure and critical behavior of these black holes through various methods in this paper. Geometrical thermodynamics is employed to give a picture regarding the phase transition of these black holes. Next, a new method is used to derive critical pressure and radius of the horizon of these black holes. In addition, Maxwell equal area law is employed to study the Van der Waals like behavior of these black holes. Moreover, the critical exponents are calculated and by using Ehrenfest equations, the type of phase transition is determined. (orig.)

Creative Work: The Case of Charles Darwin.

Science.gov (United States)

Gruber, Howard E.; Wallace, Doris B.

2001-01-01

Describes the evolving systems approach (ESA) to creative work, which emerged from a case study of Charles Darwin. Explains how the ESA differs from other approaches and describes various facets of creative work (networks of enterprise, uniqueness, insight, pluralism, and evolving belief systems and ensembles of metaphor). Emphasizes the…

Manejo integrado de la polilla de la papa

OpenAIRE

Gonzales, Miguel Angel; Chambilla, Carola; Aguilera, Javier

2007-01-01

Presentación en capacitación sobre el manejo integrado de la polilla de la papa, en taller con agricultores de comunidades del Municipio de Umala. LTRA-4 (Practices and Strategies for Vulnerable Agro-Ecosystems)

Dynamical analysis for a scalar-tensor model with Gauss-Bonnet and non-minimal couplings

Energy Technology Data Exchange (ETDEWEB)

Granda, L.N.; Jimenez, D.F. [Universidad del Valle, Departamento de Fisica, Cali (Colombia)

2017-10-15

We study the autonomous system for a scalar-tensor model of dark energy with Gauss-Bonnet and non-minimal couplings. The critical points describe important stable asymptotic scenarios including quintessence, phantom and de Sitter attractor solutions. Two functional forms for the coupling functions and the scalar potential are considered: power-law and exponential functions of the scalar field. For the exponential functions the existence of stable quintessence, phantom or de Sitter solutions, allows for an asymptotic behavior where the effective Newtonian coupling becomes constant. The phantom solutions could be realized without appealing to ghost degrees of freedom. Transient inflationary and radiation-dominated phases can also be described. (orig.)

Charles Maisonnier, the man and the friend

International Nuclear Information System (INIS)

Canobbio, E.

2001-01-01

This article is a reconstruction of a speech delivered by the author on the occasion of a Memorial Service for Dr. Maisonnier held on 19 September at the Eglise Saint Anne, Brussels. Dr. Charles Maisonnier was one of the former leaders of ITER who made significant contributions to its development

Eficacia del manejo de los residuos en el Hospital San Vicente de Paul, ciudad de Ibarra

OpenAIRE

González Salas, Raúl; Morales Arroyo, Roberto Carlos; Vidal del Río, Mildre Mercedes

2017-01-01

Los residuos generados en los hospitales representan numerosos riesgos a la salud e impactos negativos al ambiente producto al mal manejo en las etapas de recolección, tratamiento, almacenamiento, transporte y disposición final. Los esfuerzos se han encaminado a reducir los impactos que ocasiona el inadecuado manejo de los residuos hospitalarios, aun sin lograrse el éxito deseado en esta actividad, aspecto que evidencia la necesidad de plantear estrategias que fortalezcan el manejo de los res...

A FENOMENOLOGIA PRAGMATICISTA DE CHARLES S. PEIRCE

Directory of Open Access Journals (Sweden)

Túlio Tibério Quirino de Medeiros

2009-02-01

Full Text Available o presente trabalho propõe uma aproximação entre a filosofia de Kant e afenomenologia pragmaticista de Charles Peirce, buscando assinalar a relação entre aconcepção de experiência e fenômeno pertencentes a estas concepções teóricas.

76 FR 1381 - Special Local Regulations for Marine Events; Potomac River, Charles County, MD

Science.gov (United States)

2011-01-10

...-AA08 Special Local Regulations for Marine Events; Potomac River, Charles County, MD AGENCY: Coast Guard... Regulations for Marine Events; Potomac River, Charles County, MD. (a) Regulated area. The following location... local regulations during the ``Potomac River Sharkfest Swim'' amateur swim, a marine event to be held on...

Desarrollo de un sistema de inventarios para el manejo de desechos

OpenAIRE

Atencio Gómez, Yahaira; Salas Jiménez, Juan Carlos

2005-01-01

A diferencia de cualquier otro proceso productivo, el manejo de los desechos requiere un procedimiento no convencional para el Control de Inventarios, ya que en las líneas de producción regulares se cuenta con materias primas que pasan por una transformación, del cual finalmente se obtiene un producto terminado y desechos. Véase figura 1. Para el caso del manejo de desechos, se realiza una operación inversa al proceso productivo habitual, ya que de los desechos obtenidos al final de la produc...

Shadows of Einstein–dilaton–Gauss–Bonnet black holes

Energy Technology Data Exchange (ETDEWEB)

Cunha, Pedro V.P., E-mail: pintodacunha@tecnico.ulisboa.pt [Departamento de Física da Universidade de Aveiro and Centre for Research and Development in Mathematics and Applications (CIDMA), Campus de Santiago, 3810-183 Aveiro (Portugal); CENTRA, Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais 1, 1049, Lisboa (Portugal); Herdeiro, Carlos A.R., E-mail: herdeiro@ua.pt [Departamento de Física da Universidade de Aveiro and Centre for Research and Development in Mathematics and Applications (CIDMA), Campus de Santiago, 3810-183 Aveiro (Portugal); Kleihaus, Burkhard, E-mail: b.kleihaus@uni-oldenburg.de [Institute of Physics, University of Oldenburg, Oldenburg, 26111 (Germany); Kunz, Jutta, E-mail: jutta.kunz@uni-oldenburg.de [Institute of Physics, University of Oldenburg, Oldenburg, 26111 (Germany); Radu, Eugen, E-mail: eugen.radu@ua.pt [Departamento de Física da Universidade de Aveiro and Centre for Research and Development in Mathematics and Applications (CIDMA), Campus de Santiago, 3810-183 Aveiro (Portugal)

2017-05-10

We study the shadows of the fully non-linear, asymptotically flat Einstein–dilaton–Gauss–Bonnet (EdGB) black holes (BHs), for both static and rotating solutions. We find that, in all cases, these shadows are smaller than for comparable Kerr BHs, i.e. with the same total mass and angular momentum under similar observation conditions. In order to compare both cases we provide quantitative shadow parameters, observing in particular that the differences in the shadows mean radii are never larger than the percent level. Therefore, generically, EdGB BHs cannot be excluded by (near future) shadow observations alone. On the theoretical side, we find no clear signature of some exotic features of EdGB BHs on the corresponding shadows, such as the regions of negative (Komar, say) energy density outside the horizon. We speculate that this is due to the fact that the Komar energy interior to the light rings (or more precisely, the surfaces of constant radial coordinate that intersect the light rings in the equatorial plane) is always smaller than the ADM mass, and consequently the corresponding shadows are smaller than those of comparable Kerr BHs. The analysis herein provides a clear example that it is the light ring impact parameter, rather than its “size”, that determines a BH shadow.

76 FR 31230 - Safety Zone; M.I.T.'s 150th Birthday Celebration Fireworks, Charles River, Boston, MA

Science.gov (United States)

2011-05-31

...-AA00 Safety Zone; M.I.T.'s 150th Birthday Celebration Fireworks, Charles River, Boston, MA AGENCY... regulated area on the Charles River around the fireworks launch barge during the fireworks display... portions of the Charles River during a fireworks display. This rule will not have a significant economic...

78 FR 43751 - Continuation of the National Emergency With Respect to the Former Liberian Regime of Charles Taylor

Science.gov (United States)

2013-07-19

... National Emergency With Respect to the Former Liberian Regime of Charles Taylor On July 22, 2004, by... regime of Charles Taylor pursuant to the International Emergency Economic Powers Act (50 U.S.C. 1701-1706... constituted by the actions and policies of former Liberian President Charles Taylor and other persons, in...

Charles Lyell and scientific thinking in geology

Science.gov (United States)

Virgili, Carmina

2007-07-01

Charles Lyell (1797-1875) was born at Kinnordy, Scotland. His father, an amateur botanist, and his grandfather, a navigator, gave him very soon a taste for the observation of the Nature. He went to the Oxford University to study classical literature, but he also followed the geological course of William Buckland. After having been employed as jurist for some years, in 1827 he decided on a career of geologist and held the chair of geology of the King's College of London, from 1831 on. He was a contemporary of Cuvier, Darwin, von Humboldt, Hutton, Lavoisier, and was elected 'membre correspondant' of the 'Académie des sciences, France', in January 1862. Charles Lyell is one of the eminent geologists who initiated the scientific thinking in geology, in which his famous volumes of the Principles of Geology were taken as the authority. These reference volumes are based on multiple observations and field works collected during numerous fieldtrips in western Europe (principally Spain, France, and Italy) and North America. To his name are attached, among others: ( i) the concept of uniformitarism (or actualism), which was opposed to the famous catastrophism, in vogue at that time, and which may be summarized by the expression "The present is the key to the past"; ( ii) the division of the Tertiary in three series denominated Eocene, Miocene, and Pliocene, due to the study of the age of strata by fossil faunas; ( iii) the theory according to which the orogenesis of a mountain chain, as the Pyrenees, results from different pulsations on very long time scales and was not induced by a unique pulsation during a short and intense period. The uniformity of the laws of Nature is undeniably a principle Charles Lyell was the first to state clearly and to apply to the study of the whole Earth's crust, which opened a new era in geology.

Charles Dickens, Social Worker in His Time

Science.gov (United States)

Andrews, Arlene Bowers

2012-01-01

As the world marks the 200th anniversary of Charles Dickens's birth, social workers may take note of the contributions Dickens made to 19th century social reform. Ever the advocate for people who were poor and oppressed, Dickens, in his timeless fictional narratives, continues to have relevance for contemporary social justice advocacy. This…

77 FR 6708 - Special Local Regulations for Marine Events; Potomac River, Charles County, MD

Science.gov (United States)

2012-02-09

...-AA08 Special Local Regulations for Marine Events; Potomac River, Charles County, MD AGENCY: Coast Guard... River, Charles County, MD. (a) Regulated area. The following location is a regulated area: All waters of... local regulations during the ``Potomac River Sharkfest Swim'' amateur swim, a marine event to be held on...

Three Cases with Visual Hallucinations following Combined Ocular and Occipital Damage

Directory of Open Access Journals (Sweden)

Bogusław Paradowski

2013-01-01

Full Text Available Charles Bonnet syndrome is an underrecognized disease that involves visual hallucinations in visually impaired patients. We present the cases of three patients who experienced complex visual hallucinations following various pathomechanisms. In two cases, diagnosis showed coexistence of occipital lobe damage with ocular damage, while in the third case it showed occipital lobe damage with retrobulbar optic neuritis. Theories of pathogenesis and the neuroanatomical basis of complex visual hallucinations are discussed and supported by literature review.

Charles Burchfield: "October Wind and Sunlight in the Woods."

Science.gov (United States)

Fitzgerald, Gaynell

1986-01-01

Based on Charles Burchfield's watercolor, "October Wind and Sunlight in the Woods," the goal of this lesson is to introduce students in grades seven through nine to Burchfield's use of symbolism. (JDH)

76 FR 43799 - Continuation of the National Emergency With Respect to the Former Liberian Regime of Charles Taylor

Science.gov (United States)

2011-07-21

...--Continuation of the National Emergency With Respect to the Former Liberian Regime of Charles Taylor #0; #0; #0... Continuation of the National Emergency With Respect to the Former Liberian Regime of Charles Taylor On July 22... of Charles Taylor, pursuant to the International Emergency Economic Powers Act (50 U.S.C. 1701-1706...

Conmemoración de Charles Darwin (1882

Directory of Open Access Journals (Sweden)

Paolo Mantegazza

2014-07-01

Full Text Available Tres semanas después de la muerte del biólogo y naturalista inglés, Paolo Mantegazza pronunció el 21 de mayo de 1882 su "Conmemoración de Charles Darwin celebrada en el Real Instituto de Estudios Superiores en Florencia". Traducción de Juan Pérez Andrés.

Nuclear orientation facility at Charles University in Prague

International Nuclear Information System (INIS)

Rotter, M.; Trhlik, M.; Hubalovsky, S.; Srnka, A.; Dupak, J.; Ota, J.; Pari, P.

2000-01-01

A low temperature nuclear orientation facility was installed at Charles University in the laboratory of the Department of Low Temperature Physics on the Faculty of Mathematics and Physics in Prague. The solid state as well as nuclear physics research is pursued on this facility. (author)

Os falanstérios e a crítica da sociedade industrial: revisitando Charles Fourier

OpenAIRE

José D’Assunção Barros

2011-01-01

Este artigo busca examinar as idéias de Charles Fourier, escritor do século XIX habitualmente considerado como um “socialista utópico”. Uma introdução ao Socialismo Utópico no século XIX, incluindo comentários sobre outros socialistas utópicos como Saint-Simon e Robert Owen, prepara uma análise mais específica dos principais aspectos apresentados por Charles Fourier em seu Falanstério. Também são examinados aspectos relacionados à crítica social dirigida por Charles Fourier contra a sociedade...

Energetics and optical properties of 6-dimensional rotating black hole in pure Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Abdujabbarov, Ahmadjon; Ahmedov, Bobomurat; Atamurotov, Farruh; Dadhich, Naresh; Stuchlik, Zdenek

2015-01-01

We study physical processes around a rotating black hole in pure Gauss-Bonnet (GB) gravity. In pure GB gravity, the gravitational potential has a slower fall-off as compared to the corresponding Einstein potential in the same dimension. It is therefore expected that the energetics of a pure GB black hole would be weaker, and our analysis bears out that the efficiency of energy extraction by the Penroseprocess is increased to 25.8 % and the particle acceleration is increased to 55.28 %; the optical shadow of the black hole is decreased. These are in principle distinguishing observable features of a pure GB black hole. (orig.)

Las galerías filtrantes del Alto Lerma: usos y manejos sociales

Directory of Open Access Journals (Sweden)

Roberto Montes-Hernández

2011-01-01

Full Text Available La ubicación y estudio del manejo social del agua de las galerías filtrantes en el Estado de México no se ha realizado porque se ignora la existencia de este sistema hidráulico. En el presente artículo se informa por primera vez la georreferenciación y descripción del uso y manejo social del agua de las galerías filtrantes del Alto Lerma. Con base en trabajo de campo, revisión de archivos y etnografía, se verifica y describe la existencia de dicho sistema en esta región. El desarrollo de este trabajo es parte de una investigación más amplia, denominada "Caracterización del uso y manejo social del agua de las galerías filtrantes en el Estado de México", bajo la supervisión de Tonatiuh Romero.

Ocean Connections with the Historic Whaling Ship Charles W. Morgan

Science.gov (United States)

Whitney, M. M.

2016-02-01

This scientific outreach project involved the Charles W. Morgan, Mystic Seaport's historic whaling ship. We educated K-2 students, trained undergraduate and graduate students, and informed the general public about oceanographic data collection, pathways from coastal to ocean waters, and connections in marine ecosystems. I was aboard the Charles W. Morgan for the Provincetown to Stellwagen Bank leg of the historic 38th voyage in summer 2014. While at sea, our voyager team released several GPS-tracked surface drifters to reveal important flow pathways and how the Stellwagen Bank National Marine Sanctuary is connected to other ocean areas. These drifters were built by graduate and undergraduate students and the drifter artwork was designed by elementary school students. Surface currents dispersed the drifters and carried them much farther offshore than the Charles W. Morgan itself. Many drifters reached Georges Bank, another important biologically productive area. The Charles W. Morgan encountered whales for the first time in decades. Some of the food-chain connections that may explain the abundance of whales at Stellwagen bank that summer are described. This outreach project has been presented in lectures to high school teachers and the general public and also featured in an online interview, a television news story, and a newspaper article. K-2 students at an elementary school math and science day first painted drifters in advance of the voyage, viewed real-time updates in the months following drifter release, and engaged in activities illustrating ocean connectivity and marine habitats at the end of the following academic year. We aimed to convey how sensitive whales are to human activities (on land and water) and to changes in the marine environment. Successes and lessons learned will be discussed. ED003: Creative Ways to Connect Ocean Sciences to the Public

Discovery of scientific correspondence of P.P.C. Hoek (1851—1914), including three unpublished letters by Charles Darwin

NARCIS (Netherlands)

Pieters, Florence F.J.M.; Winthagen, Diny

1990-01-01

Recently the scientific correspondence of the Dutch zoologist P.P.C. Hoek (1851—1914) turned up in the Artis Library. This collection contains three hitherto unpublished letters from Charles Darwin. It appears that Charles Darwin recommended Hoek to the favour of Sir Charles Wyville Thomson upon

Echography of the Cervix and Uterus during the Proliferative and Secretory Phases of the Menstrual Cycle in Bonnet Monkeys (Macaca radiata)

Science.gov (United States)

Chaudhari, Uddhav K; Metkari, Siddnath M; Manjaramkar, Dhyananjay D; Sachdeva, Geetanjali; Katkam, Rajendra; Bandivdekar, Atmaram H; Mahajan, Abhishek; Thakur, Meenakshi H; Kholkute, Sanjiv D

2014-01-01

We undertook the present study to investigate the echographic characteristics of the uterus and cervix of female bonnet monkeys (Macaca radiata) during the proliferative and secretory phases of the menstrual cycle. The cervix was tortuous in shape and measured 2.74 ± 0.30 cm (mean ± SD) in width by 3.10 ± 0.32 cm in length. The cervical lumen contained 2 or 3 colliculi, which projected from the cervical canal. The echogenicity of cervix varied during proliferative and secretory phases. The uterus was pyriform in shape (2.46 ± 0.28 cm × 1.45 ± 0.19 cm) and consisted of serosa, myometrium, and endometrium. The endometrium generated a triple-line pattern; the outer and central lines were hyperechogenic, whereas the inner line was hypoechogenic. The endometrium was significantly thicker during the secretory phase (0.69 ± 0.12 cm) than during the proliferative phase (0.43 ± 0.15 cm). Knowledge of the echogenic changes in the female reproductive organs of bonnet monkeys during a regular menstrual cycle may facilitate understanding of other physiologic and pathophysiologic changes. PMID:24411775

Linking the Gauss-Bonnet-Chern theorem, essential HOPF maps and membrane solitons with exotic spin and statistics

International Nuclear Information System (INIS)

Tze, Chia-Hsiung

1989-01-01

By way of the Gauss-Bonnet-Chern theorem, we present a higher dimensional extension of Polyakov's regularization of Wilson loops of point solitons. Spacetime paths of extended objects become hyper-ribbons with self-linking, twisting and writhing numbers. specifically we discuss the exotic spin and statistical phase entanglements of geometric n-membrane solitons of D-dimensional KP 1 σ-models with an added Hopf-Chern-Simons term where (n, D, K) = (0, 3, C), (2, 7, H), (6, 15, Ω). They are uniquely linked to the complex and quaternion and octonion division algebras. 22 refs

Charles Olivier and the rise of meteor science

CERN Document Server

Taibi, Richard

2017-01-01

This fascinating portrait of an amateur astronomy movement tells the story of how Charles Olivier recruited a hard-working cadre of citizen scientists to rehabilitate the study of meteors. By 1936, Olivier and members of his American Meteor Society had succeeded in disproving an erroneous idea about meteor showers. Using careful observations, they restored the public’s trust in predictions about periodic showers and renewed respect for meteor astronomy among professional astronomers in the United States. Charles Olivier and his society of observers who were passionate about watching for meteors in the night sky left a major impact on the field. In addition to describing Olivier’s career and describing his struggles with competitive colleagues in a hostile scientific climate, the author provides biographies of some of the scores of women and men of all ages who aided Olivier in making shower observations, from the Leonids and Perseids and others. Half of these amateur volunteers were from 13 to 25 years of...

Holographic butterfly velocities in brane geometry and Einstein-Gauss-Bonnet gravity with matters

Science.gov (United States)

Huang, Wung-Hong

2018-03-01

In the first part of the paper we generalize the butterfly velocity formula to anisotropic spacetime. We apply the formula to evaluate the butterfly velocities in M-branes, D-branes, and strings backgrounds. We show that the butterfly velocities in M2-branes, M5-branes and the intersection M 2 ⊥ M 5 equal to those in fundamental strings, D4-branes and the intersection F 1 ⊥ D 4 backgrounds, respectively. These observations lead us to conjecture that the butterfly velocity is generally invariant under a double-dimensional reduction. In the second part of the paper, we study the butterfly velocity for Einstein-Gauss-Bonnet gravity with arbitrary matter fields. A general formula is obtained. We use this formula to compute the butterfly velocities in different backgrounds and discuss the associated properties.

El manglar de Purruja, Golfito, Costa Rica: un modelo para su manejo

Directory of Open Access Journals (Sweden)

Ana Margarita Silva

2004-12-01

Full Text Available El manglar de Purruja (Golfito, Costa Rica tiene una extensión aproximada de 70 Ha. Una investigación socio-biológica del manglar sentó las bases para el diagnóstico del mismo y facilitó el establecimiento de metas para su manejo. La comunidad y el grupo local organizado fueron factores claves para establecer las metas y el plan de acción para el manejo de los recursos. El monitoreo constante y una red de instituciones gubernamentales y no-gubernamentales de trabajo fueron los otros componentes del modelo de manejo. La supervisión técnico-profesional de forma sistemática fue una herramienta clave para conseguir las metas propuestas en el plan de acción y para establecer la red de instituciones que lograron un manejo cooperativo del manglarThe Purruja mangrove (Golfito, Costa Rica has an estimated area of 70 ha. A socio-biological research was the ground to set initial goals to manage the resources and to identify the mangrove biological condition. Community participation and the local organization were key factors in developing an integrated model for the management of natural resources. Constant monitoring and institutional networks were the other two factors to manage the mangrove. The constant profesional support was a tool to facilitate the acomplishment of goals and to establish an institucional network to promote local group iniciatives for collaborative management of the Purruja mangrove

Os falanstérios e a crítica da sociedade industrial: revisitando Charles Fourier

Directory of Open Access Journals (Sweden)

José D’Assunção Barros

2011-09-01

Full Text Available Este artigo busca examinar as idéias de Charles Fourier, escritor do século XIX habitualmente considerado como um “socialista utópico”. Uma introdução ao Socialismo Utópico no século XIX, incluindo comentários sobre outros socialistas utópicos como Saint-Simon e Robert Owen, prepara uma análise mais específica dos principais aspectos apresentados por Charles Fourier em seu Falanstério. Também são examinados aspectos relacionados à crítica social dirigida por Charles Fourier contra a sociedade industrial de sua época.

Did Jean François Barbe Anticipate Charles Darwin?

Science.gov (United States)

Drouin, Anne-Sophie; Drouin, Emmanuel; Pereon, Yann

2016-12-01

The publication of Charles Darwin's On the Origin of Species in 1859 is widely suppose to have initiated a revolution in science. In 1837, he broke with dogmatic fixism and argued that the adaptation of populations to their local environment was the cause of transmutation. Some contributors helped him start his reasoning: he indeed expressed his indebtedness to Samuel Rowley for having called his attention to Charles Wells' notions of natural selection. Darwin was certainly not the first to suggest the idea of evolution as an alternative to the creation of species by God. We report on a medical thesis published in 1837 being concluded by an unexpected and important statement related to the appearance of mammals on Earth. It remained unknown but it constitutes a link between the transformative thought of Lamarck and Geoffroy Saint Hilaire, and Darwin's work.

Contribuciones agroecológicas para renovar las fundaciones del manejo de plagas

OpenAIRE

Nicholls, Clara I.

2010-01-01

Las estrategias de manejo integrado de plagas (MIP) han estado dominadas por la idea del producto considerado como “la bala mágica’’ para controlar los brotes de plagas. Los enfoques del MIP no han abordado las causas ecológicas de los problemas de plagas en la agricultura moderna. En este articulo se plantea que los problemas de plagas pueden solucionarse mediante la reestructuración del manejo de los sistemas agrícolas, quebrando el monocultivo vía esquemas de diversificación...

Levosimendan: Nueva estrategia en el manejo de la falla cardíaca

OpenAIRE

González-Chon,Octavio; García López,Sandra María del Carmen; Chacón Mercado,Marco Alejandro; Arias Sánchez,Eduardo Agustín; Vega Zapata,Reyna Estela

2005-01-01

La insuficiencia cardíaca congestiva se ha considerado como un grave problema de salud. De manera tradicional, la insuficiencia cardíaca ha sido manejada con diferentes fármacos, como son los diuréticos, digital, inotrópicos del tipo de las catecolaminas y no catecolaminas; sin embargo, el manejo de los mismos, también tienen efectos secundarios en donde se incluyen la génesis de las arritmias e incluso la muerte. Un nuevo grupo de drogas recientemente ha impactado en el manejo de los pacient...

Manejo biológico de nematodos fitoparásitos con hongos y bacterias

Directory of Open Access Journals (Sweden)

Ricardo Piedra Naranjo

2013-05-01

Full Text Available La agricultura actual demanda la reducción de plaguicidas químicos y la introducción de sistemas sostenibles con el uso de agentes de manejo biológico.  La alternativa de usar hongos y bacterias para el manejo de nematodos fitoparásitos puede ser una opción biológica muy importante de actualidad. El manejo biológico de nematodos fitoparásitos es posible si se logra fomentar e investigar la utilización de hongos y bacterias que pueden estar en el suelo o, de lo contrario, reproducirse en laboratorios para uso comercial. En revisión de literatura se encontró varios organismos (hongos y bacterias que pueden ser utilizados por agricultores, y en algunos casos, ya están siendo aplicados. Entre los organismos encontrados, tenemos las bacterias Pasteuria penetrans, Pseudomonas (Burlkoldelia cepacia tipo Wisconsin.  Algunos hongos como: Verticillium chlamydosporium. Arthtrobotrys y Monacrosporium, Catenaria spp, Drechmeria coniospora, Pleurotus ostreatus, Pleurotus spp. Fusarium solani, Cylindrocarpon cylindroides y Paecilomyces lilacinus, Verticillium lecanii, Arthrobotrys conoides, A. musiformis, A.  robusta, Monoacrosporium ellipsosporum, Dactylaria thaumasia, Cylindrocarpon sp., Trichoderma harzianum, Dactylella brochophaga, Arthrobotrys oligospora y Arthrobotrys botryospora y Myrothecium verrucaria. Con este tipo de información, planteada desde el punto de vista en investigaciones agropecuarias, se podría tener posibilidades de utilizar nematicidas biológicos en el manejo de nematodos fitoparásitos, desarrollando un manejo integrado de plagas, donde se tendría la posibilidad de no usar de nematicidas químicos en un futuro, o por lo menos reducir sustancialmente su uso en nuestra agricultura y así mejorar la relación con el medio ambiente y el ser humano.

Manejo de conflictos en la evaluación de aprendizajes universitarios

Directory of Open Access Journals (Sweden)

María Victoria Vargas-Quintero

2010-01-01

Full Text Available Los conflictos son situaciones caracterizadas por la divergencia de pensamientos, intereses o necesidades de dos o más personas, están presentes en diversos ambientes incluyendo los académicos, y dentro de ellos, particularmente, en la evaluación. Para identificar las formas de manejo de los conflictos o tensiones evaluativas se adelantó un Estudio de Caso con 110 alumnos y 26 profesores universitarios. Al analizar el contenido de las respuestas de las entrevistas y encuestas aplicadas se observaron ocho tendencias de manejo de los conflictos que permiten enseñar habilidades sociales favorables para la formación social y ciudadana.

Manejo de conflictos en la evaluación de aprendizajes universitarios

Directory of Open Access Journals (Sweden)

María Victoria Vargas-Quintero

2010-06-01

Full Text Available Los conflictos son situaciones caracterizadas por la divergencia de pensamientos, intereses o necesidades de dos o más personas, están presentes en diversos ambientes incluyendo los académicos, y dentro de ellos, particularmente, en la evaluación. Para identificar las formas de manejo de los conflictos o tensiones evaluativas se adelantó un Estudio de Caso con 110 alumnos y 26 profesores universitarios. Al analizar el contenido de las respuestas de las entrevistas y encuestas aplicadas se observaron ocho tendencias de manejo de los conflictos que permiten enseñar habilidades sociales favorables para la formación social y ciudadana.

Manejo endoscópico del vólvulo gástrico

OpenAIRE

Gómez, Martín Alonso; Ortiz, Camilo

2011-01-01

El vólvulo gástrico es una enfermedad muy rara que puede ser aguda o crónica y estar asociada a otras patologías. Es muy importante su rápida identificación porque de su tratamiento oportuno va a depender el pronóstico del paciente. Usualmente el manejo es quirúrgico con la gastropexia abierta o laparoscopia; sin embargo, puede intentarse un manejo endoscópico el cual es más rápido, sencillo y genera una menor morbilidad para los pacientes. Presentamos en este artículo dos casos de vólvulo gá...

Percepción ciudadana del manejo de residuos sólidos municipales. El caso Riviera Nayarit

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Antonio Romualdo Márquez González

2013-01-01

Full Text Available Los problemas causados por el mal manejo de los residuos sólidos municipales podrían generar conflictos económicos y ambientales en la denominada Riviera Nayarit, integrada por los municipios de San Blas, Compostela y Bahía de Banderas. Por tanto, no es suficiente identificar y solucionar los problemas en forma parcial, ya que la economía de la zona está basada en el turismo y los servicios, principalmente. Se aplicó una encuesta para saber la percepción ciudadana sobre el manejo de los residuos sólidos municipales, y los encuestados manifestaron que si a éstos no se les daba un manejo adecuado, se reflejaría en el corto plazo en la disminución del número de visitantes. Dicha percepción fue diferenciada, y la comunidad hizo propuestas para que mejore el manejo integral de los residuos.

The iconography of the flags of Charles V: examples and documents

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Jesús F. Pascual Molina

2017-03-01

Full Text Available The Emperor Charles V formed an important group of arms and armor in his armory at Valladolid. In 1556, during his last journey to Spain, new pieces were sent to this royal armory; after his death they passed to Philip II, who sent them to Madrid, where he ordered a new building especially for the collection. Among these pieces was an important group of flags linked to major episodes of the Emperor’s life. The author describes the flags and their iconography, providing as well unpublished archival materials, which permit a better understanding of the flags used in times of Caesar Charles and their meanings.

INFLUENCIA DEL MANEJO DE LOS RESIDUOS SÓLIDOS EN EL ENTORNO AMBIENTAL DEL CAMPUS UNIVERSITARIO PERAYOC DE LA UNSAAC 2014- CUSCO

OpenAIRE

FRANCO MENDEZ, CARLOS REYNALDO

2015-01-01

MEDICIÓN Y CARACTERIZACIÓN DE LOS RESIDUOS SÓLIDOS UNIDADES DE ESTUDIO CARACTERIZACIÓN DE RESIDUOS CARACTERIZACIÓN Y EFICIENCIA DEL MANEJO DE RESIDUOS RESULTADOS DE LA OBSERVACIÓN SOBRE EL MANEJO DE LOS RESIDUOS SÓLIDOS EN LA UNSAAC GRADO DE INFLUENCIA DEL MANEJO DE RESIDUOS SOBRE EL IMPACTO AMBIENTAL IMPACTOS AMBIENTALES GENERADOS POR LA ACTIVIDAD DE MANEJO DE RESIDUOS EN LA UNSAAC. FORMULACIÓN DE LA MATRIZ DE IMPORTANCIA MATRIZ DE IMPORTANCIA: VALORACIÓN DE IMPACTOS AMBIENTALES

CHARLES R. DARWIN Y EL DESARROLLO DE LA CREATIVIDAD (

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Miranda Garnier Ximena

2010-12-01

Full Text Available Resumen:Los 200 años del nacimiento de Charles R. Darwin y los 150 años de la publicación de su libro “El origen de las especies” recuerdan la importancia de la creatividad y de comprender cómo se desarrolla. En este ensayo, analizo la autobiografía de Charles Darwin y concluyo que la creatividad en su vida surgió por interacción entre cualidades personales y una serie de circunstancias. En el análisis, sobresalen elementos que incluyen curiosidad, crecer cerca de la naturaleza, gusto por la lectura y el aprendizaje autónomo, la presencia de buenos mentores, disciplina, experiencia en los métodos de trabajo científico, disposición para establecer una red de científicos, y pasión por lo que se hace. Estos fueron elementos clave para su impacto en biología, geología, psicología, filosofía e incluso en nuestra percepción general del mundo. Se hacen reflexiones para educadores con la intención de promover el desarrollo de la creatividad en nuestros niños, niñas y jóvenes.Abstract:The 200th anniversary of Charles R. Darwin´s birth and the 150th of the publication of his “Origin of Species” remind us of the importance of creativity, and of understanding its development. In this essay, I analyze the autobiography of Charles Darwin and conclude that his creativity resulted from a series of personal qualities and circumstances. The key elements I found include curiosity, growing near nature, passion for reading and for autonomous learning, the role of good mentors, discipline, a disposition to establish a network with other scientists, experience with scientific methods, and passion for what he did. The presence of these elements in his life resulted in his transforming biology, geology, psychology, philosophy, and even our general perception of the world. Reflections for educators are presented with the intention of promoting the development of creativity in our children and youth.

Education and Utopia: Robert Owen and Charles Fourier

Science.gov (United States)

Leopold, David

2011-01-01

The aims of education, and the appropriate means of realising them, are a recurring preoccupation of utopian authors. The utopian socialists Robert Owen (1771-1858) and Charles Fourier (1772-1837) both place human nature at the core of their educational views, and both see education as central to their wider objective of social and political…

On exponential cosmological type solutions in the model with Gauss-Bonnet term and variation of gravitational constant

International Nuclear Information System (INIS)

Ivashchuk, V.D.; Kobtsev, A.A.

2015-01-01

A D-dimensional gravitational model with Gauss.Bonnet term is considered. When an ansatz with diagonal cosmological type metrics is adopted, we find solutions with an exponential dependence of the scale factors (with respect to a @gsynchronous-like@h variable) which describe an exponential expansion of @gour@h 3-dimensional factor space and obey the observational constraints on the temporal variation of effective gravitational constant G. Among them there are two exact solutions in dimensions D = 22, 28 with constant G and also an infinite series of solutions in dimensions D ≥ 2690 with the variation of G obeying the observational data. (orig.)

On exponential cosmological type solutions in the model with Gauss-Bonnet term and variation of gravitational constant

Energy Technology Data Exchange (ETDEWEB)

Ivashchuk, V.D. [VNIIMS, Center for Gravitation and Fundamental Metrology, Moscow (Russian Federation); Peoples' Friendship University of Russia, Institute of Gravitation and Cosmology, Moscow (Russian Federation); Kobtsev, A.A. [Peoples' Friendship University of Russia, Institute of Gravitation and Cosmology, Moscow (Russian Federation)

2015-05-15

A D-dimensional gravitational model with Gauss.Bonnet term is considered. When an ansatz with diagonal cosmological type metrics is adopted, we find solutions with an exponential dependence of the scale factors (with respect to a @gsynchronous-like@h variable) which describe an exponential expansion of @gour@h 3-dimensional factor space and obey the observational constraints on the temporal variation of effective gravitational constant G. Among them there are two exact solutions in dimensions D = 22, 28 with constant G and also an infinite series of solutions in dimensions D ≥ 2690 with the variation of G obeying the observational data. (orig.)

Hawking radiation and tunneling mechanism for a new class of black holes in Einstein-Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Muneyuki, Kenji; Ohta, Nobuyoshi

2012-01-01

We study Hawking radiation in a new class of black hole solutions in Einstein-Gauss-Bonnet theory. The black hole has been argued to have vanishing mass and entropy, but finite Hawking temperature. To check if it really emits radiation, we analyze Hawking radiation using the original method of quantization of a scalar field in the black hole background and with the quantum tunneling method, and confirm that it emits radiation at the Hawking temperature. A general formula is derived for the Hawking temperature and backreaction in the tunneling approach. Physical implications of these results are discussed. (orig.)

Viscosity to entropy density ratio for non-extremal Gauss-Bonnet black holes coupled to Born-Infeld electrodynamics

Energy Technology Data Exchange (ETDEWEB)

Das, Saurav [Indian Institute of Science Education and Research Kolkata, Nadia (India); Gangopadhyay, Sunandan [Indian Institute of Science Education and Research Kolkata, Nadia (India); Inter University Centre for Astronomy and Astrophysics, Pune (India); Ghorai, Debabrata [S.N. Bose National Centre for Basic Sciences, Kolkata (India)

2017-09-15

The ratio of the shear viscosity to the entropy density (η/s) is calculated for non-extremal black holes in D dimensions with arbitrary forms of the matter Lagrangian for which the space-time metric takes a particular form. The result reduces to the standard expressions in 5 dimensions. The η/s ratio is then computed for Gauss-Bonnet black holes coupled to Born-Infeld electrodynamics in 5 dimensions. As a result we found corrections as regards the BI parameter and th result is analytically exact up to all orders in this parameter. The computations are then extended to D dimensions. (orig.)

Magnetic branes in Gauss-Bonnet gravity with nonlinear electrodynamics: correction of magnetic branes in Einstein-Maxwell gravity

Energy Technology Data Exchange (ETDEWEB)

Hendi, Seyed Hossein [Shiraz University, Physics Department and Biruni Observatory, College of Sciences, Shiraz (Iran, Islamic Republic of); Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), Maragha (Iran, Islamic Republic of); Panahiyan, Shahram; Panah, Behzad Eslam [Shiraz University, Physics Department and Biruni Observatory, College of Sciences, Shiraz (Iran, Islamic Republic of)

2015-06-15

In this paper, we consider two first order corrections to both the gravity and the gauge sides of the Einstein-Maxwell gravity: Gauss-Bonnet gravity and quadratic Maxwell invariant as corrections. We obtain horizonless magnetic solutions by implying a metric representing a topological defect. We analyze the geometric properties of the solutions and investigate the effects of both corrections, and find that these solutions may be interpreted as magnetic branes. We study the singularity condition and find a nonsingular spacetime with a conical geometry. We also investigate the effects of different parameters on the deficit angle of spacetime near the origin. (orig.)

Magnetic branes in Gauss-Bonnet gravity with nonlinear electrodynamics: correction of magnetic branes in Einstein-Maxwell gravity

International Nuclear Information System (INIS)

Hendi, Seyed Hossein; Panahiyan, Shahram; Panah, Behzad Eslam

2015-01-01

In this paper, we consider two first order corrections to both the gravity and the gauge sides of the Einstein-Maxwell gravity: Gauss-Bonnet gravity and quadratic Maxwell invariant as corrections. We obtain horizonless magnetic solutions by implying a metric representing a topological defect. We analyze the geometric properties of the solutions and investigate the effects of both corrections, and find that these solutions may be interpreted as magnetic branes. We study the singularity condition and find a nonsingular spacetime with a conical geometry. We also investigate the effects of different parameters on the deficit angle of spacetime near the origin. (orig.)

Capacidade de suporte de carga e umidade crítica de um Latossolo induzida por diferentes manejos

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Cezar Francisco Araujo-Junior

2011-02-01

Full Text Available Os diferentes manejos de plantas invasoras em lavouras cafeeiras têm promovido alterações estruturais aos solos, comprometendo a sua qualidade física. Assim, o conhecimento da capacidade de suporte de carga do solo sob diferentes sistemas de manejo de plantas invasoras é essencial para o manejo sustentável do solo de lavouras cafeeiras. Os objetivos deste estudo foram: (a avaliar a influência da adoção, durante 30 anos, de diferentes sistemas de manejo de plantas invasoras na capacidade de suporte de carga de um Latossolo Vermelho distroférrico (LVdf cultivado com cafeeiros e localizado na Fazenda da Epamig em São Sebastião do Paraíso, MG (Latitude de 20 º 55 ' 00 " S e Longitude 47 º 07 ' 10 " W ; b determinar a tensão máxima (σmax aplicada ao solo por um trator; e c estabelecer as umidades volumétricas críticas (θcrítica para o tráfego de um trator. Os manejos de plantas invasoras avaliados foram: sem capina (SCAP; capina manual (CAPM; herbicida de pós-emergência (HPOS; roçadora (ROÇA; enxada rotativa (ENRT; grade (GRAD; e herbicida de pré-emergência (HPRE. Em cada sistema de manejo, 15 amostras indeformadas de solo foram coletadas aleatoriamente no centro das entrelinhas dos cafeeiros, nas profundidades de 0-3, 10-13 e 25-28 cm, totalizando 315 amostras. Em uma mata nativa (MATA sob LVdf, adjacente à área de estudo, foram coletadas 15 amostras adicionais por profundidade, as quais serviram de referência dos atributos avaliados. Os equipamentos utilizados no manejo da lavoura cafeeira foram tracionados por um trator cafeeiro Valmet® modelo 68. Para determinar a θcrítica para o tráfego do trator, foram consideradas apenas aquelas tensões que não excedem a resistência interna do solo expressa pela pressão de preconsolidação. As amostras indeformadas foram utilizadas para determinar a pressão de preconsolidação (σp em diferentes umidades volumétricas (θ e obtenção da densidade do solo (Ds. A

Autenticitet og kritisk sprogfællesskab hos Charles Taylor

DEFF Research Database (Denmark)

Crone, Manni

2002-01-01

Lever vi i individualistiske samfund, hvor autenticitet og selvrealisering er blevet de højeste værdier? Den canadiske kommunitarist Charles Taylor argumenterer for, at selv om autenticitet og selvrealisering er vigtige værdier for det moderne menneske, kan en excessiv individualisme alligevel...

MANEJO DEL DOLOR AGUDO EN EL SERVICIO DE URGENCIA

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Dra. Natalia Abiuso

2017-03-01

Se debe desarrollar un estándar de atención: desde las estrategias no farmacológicas hasta los regímenes terapéuticos protocolizados con la visión de hacer del SU un lugar de manejo integral y humanizado del dolor.

Fisiopatología, evaluación y manejo del dolor agudo en pediatría

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Tatiana Pabón-Henao

2015-12-01

Full Text Available El manejo del dolor agudo en los niños es deficiente, como lo afirma en el 2013 un estudio de la AMA (American Medical Association: la población pediátrica recibe entre 50% y 90% menos analgésicos que los adultos, es decir, no se tiene claridad en la fisiopatología, abordaje y manejo del dolor en los niños. El dolor puede clasificarse según su tiempo de duración, intensidad y mecanismo fisiopatoló-gico que lo desencadena (nociceptivo y neuropático. Teniendo en cuenta que la fisiopatología del dolor no varía con la edad pero sí como el paciente pediátrico lo manifieste, se requiere conocer el abordaje y manejo según su intensidad. Por lo tanto, el objetivo de esta revisión se enfoca en el estado del arte y en generar claridad de los aspectos críticos como son el conocimiento de la fisiopatología, valoración adecuada y el manejo no farmacológico y farmacológico del dolor agudo en pediatría.

Crystallization in Two Dimensions and a Discrete Gauss-Bonnet Theorem

Science.gov (United States)

De Luca, L.; Friesecke, G.

2018-02-01

We show that the emerging field of discrete differential geometry can be usefully brought to bear on crystallization problems. In particular, we give a simplified proof of the Heitmann-Radin crystallization theorem (Heitmann and Radin in J Stat Phys 22(3):281-287, 1980), which concerns a system of N identical atoms in two dimensions interacting via the idealized pair potential V(r)=+∞ if r1. This is done by endowing the bond graph of a general particle configuration with a suitable notion of discrete curvature, and appealing to a discrete Gauss-Bonnet theorem (Knill in Elem Math 67:1-7, 2012) which, as its continuous cousins, relates the sum/integral of the curvature to topological invariants. This leads to an exact geometric decomposition of the Heitmann-Radin energy into (i) a combinatorial bulk term, (ii) a combinatorial perimeter, (iii) a multiple of the Euler characteristic, and (iv) a natural topological energy contribution due to defects. An analogous exact geometric decomposition is also established for soft potentials such as the Lennard-Jones potential V(r)=r^{-6}-2r^{-12}, where two additional contributions arise, (v) elastic energy and (vi) energy due to non-bonded interactions.

Compact stars in alternative theories of gravity: Einstein-Dilaton-Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Pani, Paolo; Berti, Emanuele; Cardoso, Vitor; Read, Jocelyn

2011-01-01

We develop a theoretical framework to study slowly rotating compact stars in a rather general class of alternative theories of gravity, with the ultimate goal of investigating constraints on alternative theories from electromagnetic and gravitational-wave observations of compact stars. Our Lagrangian includes as special cases scalar-tensor theories (and indirectly f(R) theories) as well as models with a scalar field coupled to quadratic curvature invariants. As a first application of the formalism, we discuss (for the first time in the literature) compact stars in Einstein-Dilaton-Gauss-Bonnet gravity. We show that compact objects with central densities typical of neutron stars cannot exist for certain values of the coupling constants of the theory. In fact, the existence and stability of compact stars sets more stringent constraints on the theory than the existence of black hole solutions. This work is a first step in a program to systematically rule out (possibly using Bayesian model selection) theories that are incompatible with astrophysical observations of compact stars.

FORESTERÍA TROPICAL AL FINAL DEL CAMINO? REVISIÓN DEL MANEJO SOSTENIBLE DE BOSQUES NATIVOS TROPICALES

Directory of Open Access Journals (Sweden)

Álvaro Gustavo Cañadas López

2011-06-01

Full Text Available Este documento desglosa algunos de los mayores esfuerzos desarrollados para el manejo de los bosques naturales tropicales en el Ecuador y el mundo. En especial, están siendo revisados, el desempeño de la certificación de manejo forestal sostenible y los productos no maderables del bosque. Existen algunos ejemplos en que, bajo ciertas condiciones, el manejo de los bosques tropicales nativos es una opción viable como uso del suelo. La certificación forestal ha probado ser un instrumento que ha permitido el manejo forestal en forma sostenible. Este instrumento está trabajando en la dirección correcta, pero todavía es muy débil. Naturalmente, la certificación como único instrumento, no puede reorientar el manejo hacia la sostenibilidad y particularmente no, en términos mundiales. Se ha hablado de una fase de acercamiento de la certificación del manejo del bosque, la cual sería aceptada si ella está adaptada sobre todo, al nivel de los estándares locales, gobiernos y estructuras de participación en las iniciativas de la certificación. Fundamental es el papel de los gobiernos y de la aplicabilidad en regiones específicas (zonas tropicales, bajo condiciones concretas (por ejemplo, con una carencia de la supervisión del bosque por parte del gobierno o tipos determinados de negociaciones (intermediarios, micro-negocios. Solamente, si los consumidores dominantes del recurso y los gobiernos (especialmente políticas de gobierno, apoyan activamente el proceso y sus resultados. Entonces, los sistemas de certificación pueden entregar una solución técnica. Por otro lado, la perspectiva de los Productos no Maderables del Bosque (PNMDB, ha contribuido muy poco para la conservación del bosque tropical nativo.

Näljane vaim : sihi otsimine kaasaegses maailmas / Charles Handy

Index Scriptorium Estoniae

Handy, Charles

2002-01-01

Kapitalistlik ühiskond ja raha on vahendid, mitte eesmärgid; eesmärgid peaks iga inimene püstitama endale ise, lähtuvalt oma sisetunnetusest. Lühendatud tõlge Charles Handy raamatust - "The Hungry Spirit Beyond Capitalism - a Quest of Purpose in the Modern World"

Surgery: Modified Pi with Triple-Bonnet Flap and Fronto-Orbital Advancement.

Science.gov (United States)

Singh Raswan, Uday; Singh Chhiber, Sarbjit; Ramzan, Altaf Umar

2017-01-01

Craniosynostosis is the premature fusion of one or more of the cranial sutures and can occur as part of a syndrome or as an isolated defect. Pansynostosis is a rare form of craniosynostosis that involves premature fusion of all the cranial sutures (coronal, sagittal, metopic, and occipital). Particularly in cases of late presentation, there are heightened clinical concerns, both functional and aesthetic. In untreated cases of pansynostosis and increased intracranial pressure, optic nerve damage progresses to optic atrophy and then blindness. Cranial vault reconstruction is the standard surgical treatment. We attempt to highlight the importance of modifying the osteotomies and reshaping of the cranial vault based on individual requirements in order to achieve the best possible result and to prevent catastrophic blood loss. We present a case of modified pi with triple-bonnet flap and fronto-orbital advancement, an individual modification of the techniques of cranial vault reconstruction, in a patient with pansynostosis with optic atrophy. The technical variation can be applied to any case of pansynostosis requiring cranial vault reconstruction. © 2017 S. Karger AG, Basel.

The Grand Strategy of Charles de Gaulle

Science.gov (United States)

1989-09-08

4. TITLE AND SUBTITLE The Grand Startegy of Charles de Gaulle 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S...dependent on French influence within NATO and the Common Market . De Gaulle frequently used these fora to veto British and American initiatives. As Cook...the reserve currency. Gold would be the basis of international finance and a French-dominated European Common Market would provide the framework

Lionel Charles Renwick (Rennick) Emmett (1913-96): physician and Olympian.

Science.gov (United States)

Biswas, Tamoghna; Datta, Adrija; Chandra, Shivika

2012-08-01

Lionel Charles Renwick Emmett, a physician who trained in pre-independent India as a medical student, participated in the 1936 Berlin Summer Olympics as a part of the Indian field hockey team that won the Gold Medal.

Estado epiléptico, consideraciones sobre manejo y tratamiento

Directory of Open Access Journals (Sweden)

Solari B. Francesca, Dra.

2013-11-01

Full Text Available El estado epiléptico es una emergencia médica. Existen diversas definiciones de estado epiléptico y clasificaciones según etiología, tipo de crisis y respuesta a terapia. En esta revisión, se adopta la variable tiempo como fundamental en el manejo del paciente. Otro concepto que se resalta, es la sospecha frente a pacientes graves o con ciertas patologías, la posibilidad de presentar estado epiléptico no convulsivo, ya que la identificación de este, podría mejorar el manejo del paciente grave. Las benzodiacepinas siguen siendo la terapia de primera línea, con una muy buena tasa de respuesta, cuanto más precoz se adopte la terapia. Se discuten diferentes terapias de segunda línea (fenitoína, fenobarbital, valproato, levetiracetam y midazolam y se mencionan aquellas de tercera línea, tanto farmacológicas como otras (dieta cetogénica, inmunosupresores, corticoides y cirugía.

Hipertensión postparto: una revisión de la literatura y los protocolos de manejo

Directory of Open Access Journals (Sweden)

Anuar Alonso Cedeño Burbano

2015-04-01

Conclusión. A pesar de que existen muchos fármacos considerados compatibles con la lactancia, existe poca evidencia sobre su seguridad para el lactante. No se recomienda el manejo farmacológico de la hipertensión postparto leve a moderada. El manejo con fármacos antihipertensivos es mandatorio en hipertensión severa.

Could Charles Darwin Teach Psychology in the 1980s?

Science.gov (United States)

Rigby, Marilyn K.

1988-01-01

Discusses the implications of Charles Darwin's personal and professional history for an academic career in psychology. Relationships between his theoretical position and the content of an introductory psychology course he might teach and how he might fare in a contemporary academic environment are sketched in this fictionalized account.…

Characterization of Cardiac Time Intervals in Healthy Bonnet Macaques (Macaca radiata) by Using an Electronic Stethoscope

Science.gov (United States)

Kamran, Haroon; Salciccioli, Louis; Pushilin, Sergei; Kumar, Paraag; Carter, John; Kuo, John; Novotney, Carol; Lazar, Jason M

2011-01-01

Nonhuman primates are used frequently in cardiovascular research. Cardiac time intervals derived by phonocardiography have long been used to assess left ventricular function. Electronic stethoscopes are simple low-cost systems that display heart sound signals. We assessed the use of an electronic stethoscope to measure cardiac time intervals in 48 healthy bonnet macaques (age, 8 ± 5 y) based on recorded heart sounds. Technically adequate recordings were obtained from all animals and required 1.5 ± 1.3 min. The following cardiac time intervals were determined by simultaneously recording acoustic and single-lead electrocardiographic data: electromechanical activation time (QS1), electromechanical systole (QS2), the time interval between the first and second heart sounds (S1S2), and the time interval between the second and first sounds (S2S1). QS2 was correlated with heart rate, mean arterial pressure, diastolic blood pressure, and left ventricular ejection time determined by using echocardiography. S1S2 correlated with heart rate, mean arterial pressure, diastolic blood pressure, left ventricular ejection time, and age. S2S1 correlated with heart rate, mean arterial pressure, diastolic blood pressure, systolic blood pressure, and left ventricular ejection time. QS1 did not correlate with any anthropometric or echocardiographic parameter. The relation S1S2/S2S1 correlated with systolic blood pressure. On multivariate analyses, heart rate was the only independent predictor of QS2, S1S2, and S2S1. In conclusion, determination of cardiac time intervals is feasible and reproducible by using an electrical stethoscope in nonhuman primates. Heart rate is a major determinant of QS2, S1S2, and S2S1 but not QS1; regression equations for reference values for cardiac time intervals in bonnet macaques are provided. PMID:21439218

Interactions among motility, fertilizing ability, and testosterone binding on spermatozoa of bonnet monkey (Macaca radiata).

Science.gov (United States)

Warikoo, P K; Majumdar, S S; Allag, I S; Das, R P; Roy, S

1986-01-01

Fresh ejaculates of bonnet monkeys were separated into fractions rich with highly motile and sluggishly motile spermatozoa. The motility, ability to fertilize zona-free hamster eggs, and distribution of testosterone-binding sites on spermatozoa were assessed to determine the relation between these sperm functions. Two parameters of objective assessment of motility--velocity and degree of flagellar bending--were significantly correlated with the ability to form pronuclei in zona-free hamster eggs. Only spermatozoa with good motility could form pronuclei, which might be important for assessment of the fertilizing ability. The motility was directly related to the distribution of testosterone-binding sites; the fraction having mostly motile spermatozoa was distributed over the sperm surface. The technique is simple and may be used to evaluate semen of nonhuman primates.

Charles L. Brewer Award for Distinguished Teaching of Psychology

Science.gov (United States)

American Psychologist, 2009

2009-01-01

The American Psychological Foundation (APF) Charles L. Brewer Distinguished Teaching of Psychology Award recognizes an outstanding career contribution to the teaching of psychology. The 2009 recipient of the Distinguished Teaching Award is William Buskist. Dorothy W. Cantor, president of the APF, will present the APF Teaching Award at the 117th…

Black holes in the dilatonic Einstein-Gauss-Bonnet theory in various dimensions. 1. Asymptotically flat black holes

International Nuclear Information System (INIS)

Guo, Zong-Kuan; Ohta, Nobuyoshi; Torii, Takashi

2008-01-01

We study spherically symmetric, asymptotically flat black hole solutions in the low-energy effective heterotic string theory, which is the Einstein gravity with Gauss-Bonnet term and the dilaton, in various dimensions. We derive the field equations for suitable ansatz for general D dimensions and construct black hole solutions of various masses numerically in D=4,5,6 and 10 dimensional spacetime with (D-2)-dimensional hypersurface with positive constant curvature. A detailed comparison with the non-dilatonic solutions is made. We also examine the thermodynamic properties of the solutions. It is found that the dilaton has significant effects on the black hole solutions, and we discuss physical consequences. (author)

Litiasis renal: estudio y manejo endocrinológico

Directory of Open Access Journals (Sweden)

V. Gilberto González, Dr.

2013-09-01

Full Text Available La litiasis renal es causa de importante morbilidad y costo económico, afectando hasta el 15% de la población. Además, la litiasis renal puede ser expresión también de enfermedades extrarrenales, entre las cuales destaca riesgo aumentado de osteoporosis. Estudios nacionales muestran que las causas de litiasis renal en Chile son similares a las comunicadas internacionalmente, destacando la hipercalciuria idiopática como el principal factor de riesgo. A pesar de los avances en técnicas urológicas de remoción de cálculo, éstas no modifican la historia natural de la litiasis renal. Así, en los pacientes sin tratamiento médico, la recurrencia es la regla más que la excepción. En esta revisión se actualiza el estudio y manejo endocrinológico de la litiasis renal, para el cual la evidencia muestra que éste es eficaz y seguro en la prevención de recurrencia de litiasis renal y control de enfermedades asociadas, complementando así el manejo urológico de esta importante enfermedad.

Thermally induced pressure locking of gate valves: A survey of valve bonnet pressurization rates

International Nuclear Information System (INIS)

Ezekoye, L.I.; Moore, W.E.

1996-01-01

Closed, water filled gate valves run the risk of becoming pressurized due to heat input from the environment or from adjacent connected piping. Thermal pressurization of gate valve bonnets may lead to the valves failing to open on demand and can even induce structural failure of valves. This paper presents an analytical prediction of the pressurization rate of a closed pressure vessel subject to uniform heating which may be considered as an upper bound to the pressurization rate that may occur in the field. Then actual valve experiences described in the literature are reviewed to determine the expected pressurization rate in existing hardware designs. A statistical approach is applied to reconcile the differing pressurization rates reported in the literature and determine a rate that can be applied in valve evaluations. The limitations of the reconciled rate are discussed

A Dutch Confederate: Charles Liernur Defends Slavery in America

Directory of Open Access Journals (Sweden)

Michael J. Douma

2017-06-01

Full Text Available In the 1850s and 1860s, Dutch immigrants in America struggled to square their racial views with the politics of slavery in their new country. The historiography of the Dutch world would benefit from incorporating this story, because it is often in moments of conflict when the most explicit expressions of ideology present themselves. The letters of Charles Liernur, a Dutch-born Confederate, provide a unique insight into the mind of an explicit supporter of slavery in an American context. How and why a Dutchman could defend slavery is the primary question this article addresses. Building on Liernur’s story, this article also challenges the standard view that Dutch Americans were natural opponents of slavery. Instead, they held diverse and ambiguous views, shaped in part by the circumstances of their settlement.Een Nederlandse Confederate: Charles Liernur verdedigt slavernij in AmerikaIn de jaren vijftig en zestig van de negentiende eeuw hadden Nederlandse immigranten in Amerika grote moeite een standpunt in te nemen met betrekking tot de slavernij. Een analyse daarvan lijkt van belang voor de Nederlandse geschiedschrijving, omdat ideologische overtuigingen vaak tijdens conflicten op scherpe wijze uitgedragen worden. De brieven van Charles Liernur, een Nederlandse ‘Confederate’, bieden een unieke blik op de denkwereld van eenuitgesproken voorstander van de slavernij. Hoe en waarom kon een Nederlander zo fel de slavernij verdedigen? Dat is de centrale vraag waarop dit artikel een antwoord probeert te geven. Het verhaal van Liernur laat zien dat de gangbare visie, dat Nederlandse Amerikanen van nature tegenstanders van de slavernij waren, niet klopt. Immigranten hadden veeleer uiteenlopende en ambigue meningen over slavernij, bepaald door de omstandigheden waarmee ze in hun nieuwe vaderland te maken kregen.

Herman Charles Bosman: A Man of Profound Contradictions | Leff ...

African Journals Online (AJOL)

Herman Charles Bosman is best known for his humorous short stories with signature twist endings. He is less well known for his essays and journalistic writing, which illustrate another side of this enigmatic man. This essay focuses on the paradox that Bosman was (and continues to be) and aims to respond to the following ...

Multi- factor volatility of security at Charles Schwab Corporation ...

African Journals Online (AJOL)

This paper examined the rate of returns required by investors who invested at Charles Schwab (Discount Brokerage firm) from 30th September, 1987 to 29th August, 1997. The methodology adapted involved the use of a multi-factor stochastic model; APT. The study shows a low systematic risk of the security. There was ...

L'etica di Charles S. Peirce come teoria del valore intrinseco

Directory of Open Access Journals (Sweden)

Luca Russo

2010-01-01

Full Text Available Charles S. Peirce's Ethics as a Theory of Intrinsic Value - This paper aims to show the potential core for a theory of intrinsic value present in Charles S. Peirce’s moral philosophy. Peirce’s position on intrinsic value shows consistency with the ground assumptions of all well known theories concerning the same issue. After a preparatory discussion concerning a definition of the concept of intrinsic value, the aim of the paper consists in presenting Peirce’s position as characterized by some peculiar properties differentiating it from the other intrinsic value theories (i.e. that attention is turned towards “conducts” instead of single actions and a pluralistic view of values. This makes the core assumptions of Peirce’s argument – according to author worthy of further investigation and development.

Bravo Emma! Music in the life and work of Charles Darwin.

Science.gov (United States)

Derry, J F

2009-03-01

The long-term marital dance of Emma and Charles Darwin was set to the routine beat of an almost daily piano recital. Emma was a proficient pianist, and so a quality instrument was a welcome and appropriate house-warming present for their first marital home in London. That same piano accompanied the Darwins on their move to Downe before being upgraded for a newer model, which is still there, whilst another, cheaper piano may have played in Charles Darwin's work, particularly on earthworms. Whilst he lamented his own lack of musicality, Darwin revelled in his wife's prowess, a capacity that he recognised could be inherited, not least through observation of his own children. The evolution of musicality, he reasoned, was rooted in sexual attraction as a form of communication that preceded language.

Manejo da solução nutritiva sobre a qualidade pós-colheita de tomate salada fertirrigado em areia

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Hideaki Wilson Takahashi

2017-11-01

Full Text Available Resumo O presente trabalho teve como objetivo avaliar o efeito de manejos e concentrações da solução nutritiva em fertirrigação, em cultivo protegido, sobre a qualidade pós-colheita de tomate de mesa. Os tratamentos consistiram do manejo da solução nutritiva, tendo como base a condutividade elétrica (CE e a concentração individual de íons (CI do lixiviado, nas concentrações iniciais de 1,6 e 3,2 dS m-1. Os frutos foram avaliados quanto aos teores de macrominerais, sólidos solúveis totais (SST, vitamina C, compostos fenólicos totais, flavonoides totais e compostos antioxidantes. Os teores de N, P e S foram maiores no manejo da solução nutritiva com base na CI, independentemente da concentração inicial de íons. Os teores de K e Ca apresentaram efeitos da interação entre a forma de manejo e a concentração de íons, enquanto o teor de Mg não foi influenciado pelos fatores estudados. O teor de vitamina C e a atividade antioxidante foram maiores no manejo da solução com base em CE, enquanto o teor de fenóis e flavonoides foi maior no manejo da solução com base em CI. O tipo de manejo e a concentração da solução nutritiva em fertirrigação afetam a qualidade pós-colheita de frutos de tomate.

Quasinormal modes of Gauss-Bonnet black holes at large D

Energy Technology Data Exchange (ETDEWEB)

Chen, Bin [Department of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University,No. 5 Yiheyuan Rd, Beijing 100871 (China); Collaborative Innovation Center of Quantum Matter,No. 5 Yiheyuan Rd, Beijing 100871 (China); Center for High Energy Physics, Peking University,No. 5 Yiheyuan Rd, Beijing 100871 (China); Fan, Zhong-Ying [Center for High Energy Physics, Peking University,No. 5 Yiheyuan Rd, Beijing 100871 (China); Li, Pengcheng; Ye, Weicheng [Department of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University,No. 5 Yiheyuan Rd, Beijing 100871 (China)

2016-01-15

Einstein’s General Relativity theory simplifies dramatically in the limit that the spacetime dimension D is very large. This could still be true in the gravity theory with higher derivative terms. In this paper, as the first step to study the gravity with a Gauss-Bonnet(GB) term, we compute the quasi-normal modes of the spherically symmetric GB black hole in the large D limit. When the GB parameter is small, we find that the non-decoupling modes are the same as the Schwarzschild case and the decoupled modes are slightly modified by the GB term. However, when the GB parameter is large, we find some novel features. We notice that there are another set of non-decoupling modes due to the appearance of a new plateau in the effective radial potential. Moreover, the effective radial potential for the decoupled vector-type and scalar-type modes becomes more complicated. Nevertheless we manage to compute the frequencies of the these decoupled modes analytically. When the GB parameter is neither very large nor very small, though analytic computation is not possible, the problem is much simplified in the large D expansion and could be numerically treated. We study numerically the vector-type quasinormal modes in this case.

ALTERNATIVAS EN EL MANEJO DE LA MASTITIS EN NOVILLAS

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Genaro A. Contreras

2009-04-01

Full Text Available La mastitis en novillas es un problema que ha alcanzado importantes dimensiones a medida que las explotaciones lecheras se han especializado. Las hembras bovinas son susceptibles a infecciones intramamarias (IIM desde el momento en que la glándula mamaria se ha desarrollado completamente en el feto. Factores relacionados al animal, al medio en que se desarrolla y al manejo incrementan o reducen el riesgo de contraer IIM. El grupo de bacterias mas usualmente asociadas con IIM en novillas gestantes son los Staphylococcus coagulasa negativos (SCN, pero otras bacterias como Staphylococus aureus, Mycoplasma spp, Streptococcus uberis y Streptococcus agalactiae, son tambien importantes agentes etiológicos de IIM. Las alternativas al manejo de la mastitis en novillas están dirigidas a la reducción de factores de riesgo y se complementan con la administración de terapias de sellamiento físico del pezón, desinfectantes o antibióticas, previa evaluación de los programas de sanidad de hato con que cuenta cada explotación.

Charles Darwin's Reception in Germany and What Followed.

Directory of Open Access Journals (Sweden)

Axel Meyer

2009-07-01

Full Text Available 150 years ago, Heinrich Bronn provided in the first German translation of Charles Darwin's Origin of Species a rather liberal interpretation, even adding his own view of Darwin's ideas in an additional 15th chapter. Ernst Haeckel widely popularized his view of Darwinian evolution based on his reading of this translation. This was long seen - probably incorrectly - as the intellectual root of social Darwinism in Germany.

Estrategia para el manejo integral de residuos sólidos urbanos en el municipio de Jilotepec, México.

OpenAIRE

2013-01-01

Proyecto Terminal Profesional en el que se propone una planificación a futuro de la elaboración de una estrategia adecuada para el manejo integral de residuos sólidos urbanos sustentable, con el fin de alcanzar un estándar ambiental adecuado en el manejo de residuos.

Spatial distribution, temporal variability, and chemistry of the salt wedge in the lower Charles River, Massachusetts, June 1998 to July 1999

Science.gov (United States)

Breault, R.F.; Barlow, L.K.; Reisig, K.D.; Parker, G.W.

2000-01-01

The Charles River is of great recreational and ecological value to the Boston metropolitan region and the Commonwealth of Massachusetts. It is also the focus of the U.S. Environmental Protection Agency (USEPA) Region I, Clean Charles 2005 Task Force. The main goal of the Task Force is to make the Charles River 'fishable and swimmable' by the year 2005. Achieving 'fishable and swimmable' conditions will require continued progress in addressing a range of environmental conditions now degrading water quality, including the infiltration of saltwater from Boston Harbor into the freshwater Charles River.To better understand the pattern of saltwater intrusion, the U.S. Geological Survey (USGS), in cooperation with the U.S. Environmental Protection Agency (USEPA), Massachusetts Department of Environmental Management (MADEM), and New England Interstate Water Pollution Control Commission (NEIWPCC), collected data on the spatial distribution, temporal variability, and chemistry of the saltwater that entered the lower Charles River from June 1998 to July 1999. The purpose of this investigation is to extend and complement a regional-scale study of Charles River water quality conducted in 1996 (T. Faber, U.S. Environmental Protection Agency, written commun., 1997), and the ongoing water monitoring activities of the Massachusetts Water Resources Authority (MWRA) and the Charles River Watershed Association (CRWA). The data collected by this investigation supports the Clean Charles 2005 Task Force by providing detailed information concerning a major factor limiting 'fishable and swimmable' conditions in the lower Charles River. Finally, the study will be used to assist current planning efforts of the Metropolitan District Commission (MDC) to restore the historic parklands of the lower Charles River.The 'Basin' is the local term for the reach of the Charles River that begins at the Watertown Dam in Watertown, Mass., and extends about 8 mi through suburban and urban areas to Boston

Gender Differences in Cognition in China and Reasons for Change over Time: Evidence from CHARLS

OpenAIRE

Lei, Xiaoyan; Smith, James P.; Sun, Xiaoting; Zhao, Yaohui

2013-01-01

In this paper, we model gender differences in cognitive ability in China using a new sample of middle-aged and older Chinese respondents. Modeled after the American Health and Retirement Survey (HRS), CHARLS respondents are 45 years and older and are nationally representative of the Chinese population in this age span. Our measures of cognition in CHARLS relies on two measures that proxy for different dimensions of adult cognition - episodic memory and intact mental status. We relate these co...

78 FR 40213 - Charles Schwab Investment Management, Inc., et al.;

Science.gov (United States)

2013-07-03

... Schwab Investment Management, Inc., et al.; Notice of Application June 27, 2013. AGENCY: Securities and... exemption from sections 12(d)(1)(A) and (B) of the Act. Applicants: Charles Schwab Investment Management...) certain registered management investment companies and unit investment trusts outside of the same group of...

CHARLES DARWIN: INMORTALIZADO EN EPÓNIMOS DE GEA, FLORA Y FAUNA RECIENTES DE CHILE

OpenAIRE

Pérez, Vicente

2009-01-01

Se presentan epónimos de gea, flora y fauna de Chile, erigidos en honor de Charles Darwin, naturalista a bordo del H.M.S. Beagle (1831-1836), para denominar accidentes geográficos de territorio chileno y nuevas especies de flora y fauna descritas de ejemplares recolectados en Chile por él. Eponyms of gea, flora and fauna, erected in honour of Charles Darwin, naturalist on board of the H.M.S. Beagle (1831-1836), for desígnate geographic accidents and new species of flora and fauna described...

Incompressible Navier-Stokes equation from Einstein-Maxwell and Gauss-Bonnet-Maxwell theories

International Nuclear Information System (INIS)

Niu Chao; Tian Yu; Wu Xiaoning; Ling Yi

2012-01-01

The dual fluid description for a general cutoff surface at radius r=r c outside the horizon in the charged AdS black brane bulk space-time is investigated, first in the Einstein-Maxwell theory. Under the non-relativistic long-wavelength expansion with parameter ε, the coupled Einstein-Maxwell equations are solved up to O(ε 2 ). The incompressible Navier-Stokes equation with external force density is obtained as the constraint equation at the cutoff surface. For non-extremal black brane, the viscosity of the dual fluid is determined by the regularity of the metric fluctuation at the horizon, whose ratio to entropy density η/s is independent of both the cutoff r c and the black brane charge. Then, we extend our discussion to the Gauss-Bonnet-Maxwell case, where the incompressible Navier-Stokes equation with external force density is also obtained at a general cutoff surface. In this case, it turns out that the ratio η/s is independent of the cutoff r c but dependent on the charge density of the black brane.

75 FR 42281 - Continuation of the National Emergency With Respect To the Former Liberian Regime of Charles Taylor

Science.gov (United States)

2010-07-21

... National Emergency With Respect To the Former Liberian Regime of Charles Taylor On July 22, 2004, by... Taylor, pursuant to the International Emergency Economic Powers Act (50 U.S.C. 1701-1706). The President... States constituted by the actions and policies of former Liberian President Charles Taylor and other...

A percepção dos trabalhadores de enfermagem sobre o manejo dos resíduos químicos perigosos

Directory of Open Access Journals (Sweden)

Taiza Florêncio Costa

2012-12-01

Full Text Available Este estudo objetivou identificar a percepção dos trabalhadores de enfermagem sobre o manejo dos resíduos químicos perigosos no Hospital Universitário da Universidade de São Paulo e elaborar uma proposta para o manejo desses resíduos. Trata-se de pesquisa de abordagem qualitativa, cuja amostra foi intencional, composta por dezoito trabalhadores de enfermagem. A coleta de dados foi realizada por meio da técnica de grupo focal. Com a análise temática foram identificadas quatro categorias que evidenciaram a deficiência de treinamento nas etapas do manejo, como a primeira dificuldade expressa, tendo aparecido ainda o desconhecimento da exposição e impactos, assim como o uso dos equipamentos de proteção individual em detrimento da proteção coletiva, seguidos das sugestões quanto às medidas de competência institucional e dos trabalhadores para o manejo seguro dos resíduos químicos perigosos. Esses dados permitiram recomendar propostas para o manejo adequado dos resíduos químicos perigosos pela enfermagem.

A percepção dos trabalhadores de enfermagem sobre o manejo dos resíduos químicos perigosos

Directory of Open Access Journals (Sweden)

Taiza Florêncio Costa

Full Text Available Este estudo objetivou identificar a percepção dos trabalhadores de enfermagem sobre o manejo dos resíduos químicos perigosos no Hospital Universitário da Universidade de São Paulo e elaborar uma proposta para o manejo desses resíduos. Trata-se de pesquisa de abordagem qualitativa, cuja amostra foi intencional, composta por dezoito trabalhadores de enfermagem. A coleta de dados foi realizada por meio da técnica de grupo focal. Com a análise temática foram identificadas quatro categorias que evidenciaram a deficiência de treinamento nas etapas do manejo, como a primeira dificuldade expressa, tendo aparecido ainda o desconhecimento da exposição e impactos, assim como o uso dos equipamentos de proteção individual em detrimento da proteção coletiva, seguidos das sugestões quanto às medidas de competência institucional e dos trabalhadores para o manejo seguro dos resíduos químicos perigosos. Esses dados permitiram recomendar propostas para o manejo adequado dos resíduos químicos perigosos pela enfermagem.

Síndrome de intestino corto en niños: actualidades en su diagnóstico y manejo

Directory of Open Access Journals (Sweden)

D. Valdovinos

2012-07-01

Se realizó una búsqueda de artículos en PubMed, considerando la información existente en niños con SIC de 20 años hasta la fecha, utilizando las palabras clave “síndrome de intestino corto”. De un total de 784 artículos potenciales, se realizó una selección de 82 artículos donde realizamos la revisión de la literatura médica. Los pacientes con SIC son todo un reto para su tratamiento, por lo que se debe establecer un manejo multidisciplinario enfocado en mantener un soporte nutricional óptimo que cubra las necesidades para crecimiento, desarrollo y asimismo, disminuir al máximo la presencia de complicaciones a corto, mediano y largo plazo. El diagnóstico y manejo de un niño con SIC, implica un equipo de profesionales expertos en el manejo gastroenterológico, pediátrico y nutricional. El pronóstico del niño estará en función al manejo oportuno, así como longitud de la resección intestinal y presencia o no de válvula ileocecal.

Gauss-Bonnet models with cosmological constant and non zero spatial curvature in D = 4

Energy Technology Data Exchange (ETDEWEB)

Armaleo, Juan Manuel [UBA, Departamento de Fisica, Buenos Aires (Argentina); Osorio Morales, Juliana; Santillan, Osvaldo P. [UBA CONICET, Departamento de Matematicas Luis Santalo (IMAS), Buenos Aires (Argentina)

2018-02-15

In the present paper the possibility of eternal universes in Gauss-Bonnet theories of gravity in four dimensions is analysed. It is shown that, for zero spatial curvature and zero cosmological constant, if the coupling is such that 0 < f{sup '}(φ) ≤ c exp((√(8))/(√(10))φ), then there are solutions that are eternal. Similar conclusions are found when a cosmological constant turned on. These conclusions are not generalized for the case when the spatial curvature is present, but we are able to find some general results about the possible nature of the singularities. The presented results correct some dubious arguments in Santillan (JCAP 7:008, 2017), although the same conclusions are reached. On the other hand, these past results are considerably generalized to a wide class of situations which were not considered in Santillan (JCAP 7:008, 2017). (orig.)

RECEITA/CUSTO DA ATIVIDADE DE EXPLORAÇÃO FLORESTAL EM UM PLANO DE MANEJO FLORESTAL SUSTENTÁVEL NA AMAZÔNIA – ESTUDO DE CASO

OpenAIRE

Bona, Diego Antonio Ottonelli de; Universidade Federal do Espírito Santo - UFES; Silva, Diego Armando Silva da; Universidade Federal do Espírito Santo - UFES; Pinheiro, Leonardo Luis; Universidade Federal do Espírito Santo - UFES; Silva, Evandro Ferreira da; Universidade Federal do Espírito Santo - UFES; Chichorro, José Franklim; Universidade Federal do Espírito Santo - UFES; Basso, Mateus; Universidade Federal do Espírito Santo - UFES

2015-01-01

A Floresta Amazônica devido a sua grande importância econômica e ecológica ganhou destaque mundial, dessa forma o manejo florestal sustentável tornou-se foco na comunidade cientifica, visando o desenvolvimento econômico, social e ambiental. A análise da viabilidade econômica do manejo florestal é uma importante ferramenta, que visa determinar o lucro do manejo florestal sobre o recurso floresta, para produção de madeira sob técnicas de manejo florestal sustentável. Assim, o objetivo do estudo...

Manejo prehospitalario del trauma musculosquelético

OpenAIRE

Blanco Rubio, Francisco Javier

2017-01-01

Una de las lesiones que se dan con mayor frecuencia en los pacientes atendidos por los servicios de urgencias y emergencias prehospitalarias es el trauma musculoesquelético y aunque por sí solo no supone una amenaza para la supervivencia del paciente, sí puede traer consigo complicaciones que conlleven riesgo para la vida. El manejo prehospitalario de este tipo de lesiones a menudo queda relegado a la valoración secundaria y únicamente se ven en la primaria cuando en la extremidad se ha pr...

The Scientific Metaphysics of Charles S. Peirce

DEFF Research Database (Denmark)

Sørensen, Bent; Thellefsen, Torkild Leo

Charles S. Peirce (1839-1914) was, perhaps, first and foremost a practising or experimental scientist. However, Peirce was also a philosopher, and to him the relation between science and metaphysics was intimate. Peirce not only wanted to develop a metaphysical system consistent with the important...... scientific results and conceptions of his time, but also, like Immanuel Kant, to set metaphysics on the path of a science. This collection of articles investigates central themes and difficulties in the metaphysics of Peirce - some of the articles clarify aspects of his metaphysics, others also show...

Chiari-like malformation and syringomyelia in cavalier King Charles spaniels

NARCIS (Netherlands)

Rusbridge, C.

2007-01-01

This thesis is the cumulation of over a decade of study into the pathogenesis and treatment Chiari-like malformation and syringomyelia (CM/SM) in the cavalier King Charles spaniel (CKCS). Chiari-like malformation is a condition where the brain is too big for the skull and is crushed and pushed out

Prints Charles ja prints Michael külastasid Tallinna kirikuid / Allan Tammiku

Index Scriptorium Estoniae

Tammiku, Allan

2001-01-01

Prints Charles külastas 6. novembril Eesti-visiidi ajal Tallinna toomkirikut ja Pühavaimu kirikut, prints Michael viibis Tallinnas 11. novembril eravisiidil, ta külastas toomkirikut, Niguliste ja Pühavaimu kirikut

Altura do ipê-roxo (Tabebuia avellanedae nos manejos convencional e de precisão, analisada pela geoestatística.

Directory of Open Access Journals (Sweden)

Wagner Lopes Klein

2010-08-01

Full Text Available A silvicultura de precisão visa aumentar a eficiência da produção agrícola, fundamentada em manejo diferenciado de áreas de agricultura. O objetivo deste trabalho foi analisar e comparar o desenvolvimento do ipê roxo (Tabebuia avellanedae Lorentz ex Griseb. sob duas formas de manejo de solo. A análise foi realizada durante o período de 01/03/03 a 01/03/04 em uma área no município de Mundo Novo-MS, dividida em dois blocos, e cada bloco em duas parcelas: uma sob manejo de silvicultura de precisão e outra sob manejo convencional. Cada uma das parcelas recebeu 252 mudas de ipê-roxo, totalizando 1008 plantas. Utilizaram-se técnicas geoestatísticas como semivariogramas para análise da estrutura da variabilidade espacial dos dados e a interpolação por krigagem para a construção de mapas temáticos. Dos resultados obtidos, tem-se que os mapas de necessidade e aplicação de nutrientes e os mapas de incremento na altura das plantas apresentaram estrutura de variabilidade semelhante para ambos os manejos. Nenhuma diferença expressiva entre os tratamentos foi encontrada.

2010 NOAA Ortho-rectified Mosaic from Color Aerial Imagery of LAKE CHARLES

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains ortho-rectified mosaic tiles, created as a product from the NOAA Integrated Ocean and Coastal Mapping (IOCM) initiative of LAKE CHARLES. The...

Competencia Digital: Uso y manejo de modelos 3D tridimensionales digitales e impresos en 3D

OpenAIRE

Jose Luis Saorín; Cecile Meier; Jorge de la Torre-Cantero; Carlos Carbonell-Carrera; Dámari Melián-Díaz; Alejandro Bonnet de León

2017-01-01

El uso y manejo de modelos tridimensionales digitales no está concebido dentro de la competencia digital de los currículos de secundaria y Bachillerato. Sin embargo muchos autores relacionan la competencia digital con el manejo de modelos 3D, el modelado 3D y entornos virtuales tridimensionales (Realidad aumentada, virtual,…). En este artículo se presenta un recurso educativo para facilitar el acceso a contenidos didácticos de carácter tridimensional digital y tangible. Determinadas materias ...

Passings to note: Paul Michael Packman, MD; S. Charles Schulz, MD.

Science.gov (United States)

Black, Donald W

2018-02-01

One of the keys to the success of Annals of Clinical Psychiatry has always been the tireless efforts of our dedicated Editorial Board. We recently lost 2 longtime Editorial Board members, Drs. Paul Michael Packman and S. Charles Schulz. Both will be greatly missed.

Bases biológicas para la evaluación y manejo de metapoblaciones de loco en la III y IV Regiones

OpenAIRE

González, J.; Tapia, C.; Wilson, A.; Stotz, W.; Orensanz, J.M.; Parma, A.M.; Valero, J.; Catrilao, M.; Garrido, J.

2005-01-01

En la III y IV Regiones las áreas de manejo y explotación de recursos bentónicos (AMERB) se han establecido como la principal herramienta de manejo del recurso loco (Concholepas concholepas). Sin embargo, su aplicabilidad para la administración y aporte en términos del desarrollo sustentable, aunque sugerentes, requieren de una evaluación objetiva, en cuanto al manejo de carácter discreto que se ha establecido para cada AMERB, desconociendo la eventual interacción espacial de las mismas. En e...

Guía práctica para la identificación y manejo de plagas en hortalizas Guía práctica para la identificación y manejo de plagas en hortalizas

OpenAIRE

Figueroa P. Adalberto; Gonzalez D. Fernando; Barrios G. Fernando

1986-01-01

Guía práctica para la identificación y manejo de plagas en hortalizas La guía práctica comprende una descripción de los insectos, ácaros y moluscos que atacan los cultivos hortícolas en nuestro país. Se registraron 33 especies hortícolas pertenecientes a 10 familias botánicas que por su afinidad bioquímica atraen las mismas plagas. Se describieron 52 plagas con las respectivas recomendaciones de manejo. También se presentan las alternativas para un control eficaz con enfoque ecológico.This wo...

New Gauss-Bonnet Black Holes with Curvature-Induced Scalarization in Extended Scalar-Tensor Theories.

Science.gov (United States)

Doneva, Daniela D; Yazadjiev, Stoytcho S

2018-03-30

In the present Letter, we consider a class of extended scalar-tensor-Gauss-Bonnet (ESTGB) theories for which the scalar degree of freedom is excited only in the extreme curvature regime. We show that in the mentioned class of ESTGB theories there exist new black-hole solutions that are formed by spontaneous scalarization of the Schwarzschild black holes in the extreme curvature regime. In this regime, below certain mass, the Schwarzschild solution becomes unstable and a new branch of solutions with a nontrivial scalar field bifurcates from the Schwarzschild one. As a matter of fact, more than one branch with a nontrivial scalar field can bifurcate at different masses, but only the first one is supposed to be stable. This effect is quite similar to the spontaneous scalarization of neutron stars. In contrast to the standard spontaneous scalarization of neutron stars, which is induced by the presence of matter, in our case, the scalarization is induced by the curvature of the spacetime.

Gravity localization in non-minimally coupled scalar thick braneworlds with a Gauss-Bonnet term

International Nuclear Information System (INIS)

Malagon-Morejon, D; Quiros, I; Herrera-Aguilar, A

2011-01-01

We consider a warped five-dimensional thick braneworld with a four-dimensional Poincare invariant space-time in the framework of scalar matter non-minimally coupled to gravity plus a Gauss-Bonnet term in the bulk. Scalar field and higher curvature corrections to the background equations as well as the perturbed equations are shown. A relationship between 4-dimensional and 5-dimensional Planck masses is studied in general terms. By imposing finiteness of the 4-dimensional Planck mass and regularity of the geometry, the localization properties of the tensor modes of the first order perturbed geometry are analized for an important class of solutions motivated by models with scalar fields which are minimally coupled to gravity. In order to study the gravity localization properties for this model, the normalizability condition for the lowest level of the tensor fluctuations is analized. We see that for the class of solutions examined, gravity in 4 dimensions is recovered if the curvature invariants are regular and Planck masses are finite.

Generalized spheroidal spacetimes in 5-D Einstein-Maxwell-Gauss-Bonnet gravity

Energy Technology Data Exchange (ETDEWEB)

Hansraj, Sudan [University of KwaZulu Natal, Astrophysics and Cosmology Research Unit, Durban (South Africa)

2017-08-15

The field equations for static EGBM gravity are obtained and transformed to an equivalent form through a coordinate redefinition. A form for one of the metric potentials that generalizes the spheroidal ansatz of Vaidya-Tikekar superdense stars and additionally prescribing the electric field intensity yields viable solutions. Some special cases of the general solution are considered and analogous classes in the Einstein framework are studied. In particular the Finch-Skea ansatz is examined in detail and found to satisfy the elementary physical requirements. These include positivity of pressure and density, the existence of a pressure free hypersurface marking the boundary, continuity with the exterior metric, a subluminal sound speed as well as the energy conditions. Moreover, the solution possesses no coordinate singularities. It is found that the impact of the Gauss-Bonnet term is to correct undesirable features in the pressure profile and sound speed index when compared to the equivalent Einstein gravity model. Furthermore graphical analyses suggest that higher densities are achievable for the same radial values when compared to the 5-dimensional Einstein case. The case of a constant gravitational potential, isothermal distribution as well as an incompressible fluid are studied. All exact solutions derived exhibit an equation of state explicitly. (orig.)

Charles Darwin: genius or plodder?

Science.gov (United States)

Wilkins, Adam S

2009-11-01

There is no doubt about the magnitude of Charles Darwin's contributions to science. There has, however, been a long-running debate about how brilliant he was. His kind of intelligence was clearly different from that of the great physicists who are deemed geniuses. Here, the nature of Darwin's intelligence is examined in the light of Darwin's actual style of working. Surprisingly, the world of literature and the field of neurobiology might supply more clues to resolving the puzzle than conventional scientific history. Those clues suggest that the apparent discrepancy between Darwin's achievements and his seemingly pedestrian way of thinking reveals nothing to Darwin's discredit but rather a too narrow and inappropriate set of criteria for "genius." The implications of Darwin's particular creative gifts with respect to the development of scientific genius in general are briefly discussed.

Charles Darwin: His Life, Journeys and Discoveries. A Teacher's Guide.

Science.gov (United States)

Overy, Caroline

This handbook aims to: (1) introduce teachers and pupils to Charles Darwin, his life and work at Down House, his voyage on the Beagle, and his evolutionary theory; (2) set his ideas within the wider context of the 19th century; (3) link the subject areas to the British National Curriculum, particularly in history, science, and English at various…

Scientific Cousins: The Relationship between Charles Darwin and Francis Galton

Science.gov (United States)

Fancher, Raymond E.

2009-01-01

This article traces the personal as well as the intellectual and scientific relationship between Charles Darwin and his younger half-cousin Francis Galton. Although they had been on friendly terms as young men, and Darwin had in some ways been a role model for Galton, the two did not share major scientific interests until after the publication of…

EL NIÑO QUE RONCA: IMPORTANCIA Y MANEJO

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Dr. Selim Abara

2017-01-01

Full Text Available El ronquido en los niños es el signo más frecuente de trastorno respiratorio del sueño (TROS. La importancia de estos trastornos reside en su alta prevalencia y las morbilidades asociadas, como trastornos neurocognitivos, rendimiento escolar deficiente, disfunción conductual, complicaciones cardiovasculares, consecuencias metabólicas y mala calidad de vida relacionada con la salud. La sospecha clínica se basa en una buena anamnesis y examen físico, aunque en muchos casos es insuficiente para afirmar o descartar la existencia de un TROS; por esta razón es importante contar con pruebas específicas, entre las cuales la polisomnografía es el estándar de oro, pero es necesario establecer criterios para indicar estos exámenes debido a su disponibilidad limitada y a su elevado costo. La adenotonsilectomía es el tratamiento más común de TROS en los niños, sin embargo, el grupo de pacientes con comorbilidad de mayor complejidad requiere un estudio más completo y un tratamiento multidisciplinario. En esta revisión se actualizan los conocimientos acerca de los TROS y su manejo. Se propone un diagrama de flujo para el estudio y manejo de un niño que ronca.

Gauss-Bonnet coupling constant as a free thermodynamical variable and the associated criticality

International Nuclear Information System (INIS)

Xu, Wei; Xu, Hao; Zhao, Liu

2014-01-01

The thermodynamic phase space of Gauss-Bonnet (GB) AdS black holes is extended, taking the inverse of the GB coupling constant as a new thermodynamic pressure P GB . We studied the critical behavior associated with P GB in the extended thermodynamic phase space at fixed cosmological constant and electric charge. The result shows that when the black holes are neutral, the associated critical points can only exist in five dimensional GB-AdS black holes with spherical topology, and the corresponding critical exponents are identical to those for the Van der Waals system. For charged GB-AdS black holes, it is shown that there can be only one critical point in five dimensions (for black holes with either spherical or hyperbolic topologies), which also requires the electric charge to be bounded within some appropriate range; while in d < 5 dimensions, there can be up to two different critical points at the same electric charge, and the phase transition can occur only at temperatures which are not in between the two critical values. (orig.)

The new nuclear orientation facility at Charles University Prague

International Nuclear Information System (INIS)

Rotter, M.; Hubalovsky, S.; Trhlik, M.; Janotova, J.; Dupak, J.; Srnka, A.; Forget, P.; Pari, P.

1996-01-01

The Nuclear Orientation facility for solid state physics investigations was installed at the Department of Low Temperature Physics of the Faculty of Mathematics and Physics, Charles University. The small 'top loaded' dilution refrigerator is used for cooling radioactive metallic samples to 10 mK in 4 T magnetic field. The construction and thermodynamic parameters of the 'French type' refrigerator working without 1 K precooling stage are described. (author)

Informe Especial sobre el Manejo de los Residuos Sólidos en Panamá. Panamá,

OpenAIRE

2007-01-01

La Defensoría del Pueblo, atenta al mandato consagrado en la Ley No. 7 de 5 de febrero de 1997, reformada por la Ley No. 41 de 1 de diciembre de 2005, ha elaborado este informe especial sobre la creciente problemática de los residuos sólidos en la República de Panamá y cuya finalidad es proporcionar elementos que faciliten la toma de decisiones gubernamentales relacionadas con su manejo. El inadecuado manejo y disposición final de los residuos sólidos, que en su mayoría son depositados dentro...

Risk-based modelling of surface water quality: a case study of the Charles River, Massachusetts

Science.gov (United States)

McIntyre, Neil R.; Wagener, Thorsten; Wheater, Howard S.; Chapra, Steven C.

2003-04-01

A model of phytoplankton, dissolved oxygen and nutrients is presented and applied to the Charles River, Massachusetts within a framework of Monte Carlo simulation. The model parameters are conditioned using data from eight sampling stations along a 40 km stretch of the Charles River, during a (supposed) steady-state period in the summer of 1996, and the conditioned model is evaluated using data from later in the same year. Regional multi-objective sensitivity analysis is used to identify the parameters and pollution sources most affecting the various model outputs under the conditions observed during that summer. The effects of Monte Carlo sampling error are included in this analysis, and the observations which have least contributed to model conditioning are indicated. It is shown that the sensitivity analysis can be used to speculate about the factors responsible for undesirable levels of eutrophication, and to speculate about the risk of failure of nutrient reduction interventions at a number of strategic control sections. The analysis indicates that phosphorus stripping at the CRPCD wastewater treatment plant on the Charles River would be a high-risk intervention, especially for controlling eutrophication at the control sections further downstream. However, as the risk reflects the perceived scope for model error, it can only be recommended that more resources are invested in data collection and model evaluation. Furthermore, as the risk is based solely on water quality criteria, rather than broader environmental and economic objectives, the results need to be supported by detailed and extensive knowledge of the Charles River problem.

Charles L. Brewer Award for Distinguished Teaching of Psychology: Neil Lutsky

Science.gov (United States)

American Psychologist, 2011

2011-01-01

The American Psychological Foundation (APF) Charles L. Brewer Award for Distinguished Teaching of Psychology recognizes an outstanding career contribution to the teaching of psychology. The 2011 recipient of the Distinguished Teaching Award is Neil Lutsky. Dorothy W. Cantor, president of the APF, will present the APF Distinguished Teaching Award…

CHARLES R. DARWIN Y EL DESARROLLO DE LA CREATIVIDAD

Directory of Open Access Journals (Sweden)

Ximena Miranda Garnier

2010-01-01

Full Text Available Los 200 años del nacimiento de Charles R. Darwin y los 150 años de la publicación de su libro "El origen de las especies" recuerdan la importancia de la creatividad y de comprender cómo se desarrolla. En este ensayo, analizo la autobiografía de Charles Darwin y concluyo que la creatividad en su vida surgió por interacción entre cualidades personales y una serie de circunstancias. En el análisis, sobresalen elementos que incluyen curiosidad, crecer cerca de la naturaleza, gusto por la lectura y el aprendizaje autónomo, la presencia de buenos mentores, disciplina, experiencia en los métodos de trabajo científico, disposición para establecer una red de científicos, y pasión por lo que se hace. Estos fueron elementos clave para su impacto en biología, geología, psicología, filosofía e incluso en nuestra percepción general del mundo. Se hacen reflexiones para educadores con la intención de promover el desarrollo de la creatividad en nuestros niños, niñas y jóvenes.

Resurrecting Democracies : Secularity Recast in Charles Taylor, Paul Valadier, and Joseph Ratzinger

NARCIS (Netherlands)

Ossewaarde-Lowtoo, Roshnee

In this article, the alternative conception of secularity of Charles Taylor, Paul Valadier and Joseph Ratzinger (former Benedict XVI) is explored. A secularized society, which they take as an established condition, does not necessarily exclude religion, Christianity or Christian transcendence, in

Proyecto: Manejo y Globalización de los Residuos Hospitalarios en el Distrito de Chitré.

OpenAIRE

Cedeño, Carlos

2016-01-01

El ambiente es un factor determinante para la calidad de vida de una comunidad por ende es cuestión de todos velar por su preservación. Debido a lo antes expuesto, surge el interés por realizar un estudio sobre el Manejo y Disposición Final de los Residuos Hospitalarios en el Distrito de Chitré. Este estudio tiene como objetivos generales: 1 Analizar la situación actual del manejo y disposición final de los residuos hospitalarios en el Distrito de Chitré. 2. Recomendar alterna...

Percepción ciudadana del manejo de residuos sólidos municipales. El caso Riviera Nayarit

OpenAIRE

Antonio Romualdo Márquez González; María Elena Ramos Pantoja; Verónica Alejandra Mondragón Jaimes

2013-01-01

Los problemas causados por el mal manejo de los residuos sólidos municipales podrían generar conflictos económicos y ambientales en la denominada Riviera Nayarit, integrada por los municipios de San Blas, Compostela y Bahía de Banderas. Por tanto, no es suficiente identificar y solucionar los problemas en forma parcial, ya que la economía de la zona está basada en el turismo y los servicios, principalmente. Se aplicó una encuesta para saber la percepción ciudadana sobre el manejo de los resid...

Plan de manejo ambiental del área Académica y Agrícola de la carrera de ciencias Agropecuarias_Iasa I

OpenAIRE

Barahona Paz y Miño, María Fernanda; Salas Vernis, Gabriela Rocío

2013-01-01

El presente proyecto es una propuesta de plan de manejo ambiental para las instalaciones de las áreas académica y agrícola de la Carrera de Ciencias Agropecuarias_IASA I. Previo a la propuesta del plan de manejo ambiental, se ha generado información sobre los desechos producidos en estas áreas, utilizando medios para la recopilación de información como monitoreo de desechos sólidos, pruebas de laboratorio de agua y suelo, programas de manejo de agroquímicos y fertilizantes. Se reformó el sist...

RELACIÓN ENTRE EL MANEJO FORESTAL Y EL BIENESTAR SOCIOECONÓMICO EN DOS EJIDOS DE QUINTANA ROO

Directory of Open Access Journals (Sweden)

Alejandra Ríos-Cortez

2012-01-01

Full Text Available El deterioro de los recursos naturales a nivel mundial ha ocasionado cuestionamientos importantes sobre el paradigma de su uso y las perspectivas de desarrollo futuro al ritmo de explotación actual. En México, el manejo forestal se encuentra principalmente en manos de ejidos y comunidades. Esta investigación evaluó en el año 2010 el impacto del Plan Piloto Forestal (PPF en Quintana Roo establecido en el decenio de 1980. En la evaluación se consideraron aspectos socioeconómicos y culturales del manejo forestal en dos ejidos: Noh Bec y Xhazil Sur y Anexos. El bienestar, las condiciones naturales y el cambio en aspectos sociales, económicos y culturales, se analizaron con un índice de bienestar con relación al manejo forestal. Este índice consideró cinco sistemas: natural, humano, social, económico y cultural. La condición actual de bienestar con relación al aprovechamiento forestal fue media alta y media, para Noh Bec y Xhazil, respectivamente. En ambos ejidos, el manejo forestal con los lineamientos estratégicos del PPF fue un proceso adaptativo para los ejidatarios, presentando diferencias significativas en organización comunal, comercialización, diversificación y apoyo económico y técnico.

Charles Taylor na Haia: limites da justiça internacional?

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IZADORA XAVIER DO MONTE

2010-11-01

Full Text Available Recentemente o julgamento de Charles Taylor, um dos protagonistas no conflito civil na Libéria, atraiu a corte internacional em Haia para o foco da comunidade internacional. Assim, o presente artigo busca delimitar as conseqüências políticas e jurídicas que advirão desse processo para a comunidade internacional como um todo.

Incidência de mosca-minadora e insetos vetores em sistemas de manejo de pragas em tomateiro

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Dirceu Pratissoli

Full Text Available RESUMOOs artrópodes considerados vetores de viroses são pragas iniciais na cultura do tomateiro e possuem capacidade de causar danos diretos e indiretos, principalmente quando ocorrem falhas no manejo. O objetivo deste estudo foi estudar a incidência e infestação de vetores de viroses em dois sistemas de manejo de pragas em plantios de tomateiro estaqueado. O experimento foi conduzido em plantio de tomateiro da variedade 'Débora Mix', grupo Santa Clara, com espaçamento de 1,0 x 0,5 m (linhas x plantas, em condução com duas hastes (Tutoramento vertical. Os sistemas avaliados foram: Manejo Ecológico de Pragas (MEP - monitoramento das pragas e tomada de decisão para a aplicação de inseticidas com base no nível de infestação e Convencionalcalendário de aplicações que iniciaram sete dias após o transplantio e seguiram sendo realizadas duas vezes por semana. A maior incidência de B. tabaci ocorreu no sistema MEP, enquanto que a maior incidência de Liriomyza sp. e diferentes espécies de pulgões ocorreu no sistema convencional, mas para F. schultzei não houve diferença na incidência entre os manejos. Houve infestação dos vetores de viroses durante todo o período de condução da cultura e, no geral, considerando todos os insetospraga, a redução no número de aplicações foi de 88,14% no MEP. O sistema de manejo adotado não interfere na incidência e infestação de vetores de viroses na cultura, mas a implantação do sistema MEP viabiliza a utilização criteriosa dos defensivos agrícolas, permitindo redução do número de pulverizações com consequente redução dos custos de produção.

Controversias en el manejo actual de la coartación de la aorta

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Edgardo Vanegas

2013-09-01

Full Text Available La coartación de la aorta fue descrita clásicamente como una simple estrechez del istmo aórtico que podría ser "curada" por medio de cirugía. En la actualidad se sabe que es la manifestación clínica de una vasculopatía arterial más amplia, en donde la afección del arco aórtico puede ser variable. La corrección quirúrgica ha demostrado ser un tratamiento efectivo para el manejo de la coartación aórtica nativa y permanece como el de elección en neonatos. De otra parte, la angioplastia con balón es el tratamiento de elección en niños con recoartación, cuyos resultados en la reducción aguda del gradiente aórtico posterior al manejo de la coartación nativa, son similares a los obtenidos con cirugía. La implantación de prótesis endovasculares (stents ha mostrado excelentes resultados a corto plazo tanto en niños mayores como en adultos con coartación nativa. En pacientes con coartación recurrente considerados de alto riesgo quirúrgico, la angioplastia con balón y la implantación de stent ofrecen una estrategia de manejo menos invasiva e igual de efectiva. Se prefiere el uso de stents sobre la angioplastia con balón en adultos y niños mayores con coartación recurrente, ya que el riesgo de recoartación y formación de aneurismas parece ser menor. No se cuenta con suficiente información acerca de los desenlaces a largo plazo posteriores al tratamiento percutáneo de la coartación aórtica. Este artículo revisa las controversias existentes en cuanto al manejo actual de esta condición.

Controversias en el manejo actual de la coartación de la aorta

Directory of Open Access Journals (Sweden)

Edgardo Vanegas, MD

2013-09-01

Full Text Available La coartación de la aorta fue descrita clásicamente como una simple estrechez del istmo aórtico que podría ser “curada” por medio de cirugía. En la actualidad se sabe que es la manifestación clínica de una vasculopatía arterial más amplia, en donde la afección del arco aórtico puede ser variable. La corrección quirúrgica ha demostrado ser un tratamiento efectivo para el manejo de la coartación aórtica nativa y permanece como el de elección en neonatos. De otra parte, la angioplastia con balón es el tratamiento de elección en niños con recoartación, cuyos resultados en la reducción aguda del gradiente aórtico posterior al manejo de la coartación nativa, son similares a los obtenidos con cirugía. La implantación de prótesis endovasculares (stents ha mostrado excelentes resultados a corto plazo tanto en niños mayores como en adultos con coartación nativa. En pacientes con coartación recurrente considerados de alto riesgo quirúrgico, la angioplastia con balón y la implantación de stent ofrecen una estrategia de manejo menos invasiva e igual de efectiva. Se prefiere el uso de stents sobre la angioplastia con balón en adultos y niños mayores con coartación recurrente, ya que el riesgo de recoartación y formación de aneurismas parece ser menor. No se cuenta con suficiente información acerca de los desenlaces a largo plazo posteriores al tratamiento percutáneo de la coartación aórtica. Este artículo revisa las controversias existentes en cuanto al manejo actual de esta condición.

Charles Darwin and the 1835 earthquake at Concepcion, Chile

Science.gov (United States)

Spall, H.

1981-01-01

On a stormy night in October 1836, H.M.S Beagle hove to and dropped anchor at Falmouth, a remote harbor in southwest England. Charles Darwin, the ship's naturalist, came ashore to take the mail coach to Shrewsbury. This was inauspicious end to an epic 5-year voyage around the coast of South America, the results of which were to have a tumultuous impact on scientific thought that has lasted to this day. 

The Voyage of the Beagle: Field Work Lessons from Charles Darwin.

Science.gov (United States)

Smith, Louis M.

1987-01-01

Analyzes Charles Darwin's letters to his family during his voyage on H.M.S. Beagle. Relates the information to the development of Darwin's professional identity and the degree to which the concepts, field methods, and research methods revealed in Darwin's personal correspondence are useful to students of educational administration. (MD)

78 FR 51803 - Culturally Significant Objects Imported for Exhibition Determinations: “Charles Marville...

Science.gov (United States)

2013-08-21

... ``Charles Marville: Photographer of Paris,'' imported from abroad for temporary exhibition within the United... on or about January 5, 2014, the Metropolitan Museum of Art, New York, New York, from on or about...

Manejo del aula, competencia básica del maestro líder

Directory of Open Access Journals (Sweden)

Ray Petty

2001-06-01

Full Text Available Es necesario establecer dos áreas específicas para llevar a cabo un proceso de enseñanza-aprendizaje efectivo: la de los contenidos programáticos y la de la naturaleza del quehacer de aula. El autor se concentra en este último aspecto, fundamentado en un enfoque conductual. Se establecen tres componentes para el manejo de aula: (a Definición de conductas apropiadas e inapropiadas. (b La forma de llamar la atención de los estudiantes que no cumplen con las expectativas. (c El desarrollo de un sistema de manejo de conducta. Los docentes que utilizan carteles de normas en sus clases, encontrarán dos ejemplos, en los que descubrirá aciertos y errores. Se resalta la importancia de las "palmaditas positivas" o recompensas y se alerta del peligro de utilizar los castigos en forma indebida.

Síndrome de Hallermann-Streiff y embarazo: manejo de la vía aérea difícil en embarazadas

OpenAIRE

Rojas G, Andrés; Balkenhol N, Marco; Herrera C, Omar; Opazo V, Marcela; Hernández P, Marcela; Rivera C, Marcos

2016-01-01

El síndrome de Hallermann-Streiff es una rara entidad asociada a hipoplasia del tercio inferior de la cara, determinando así una vía aérea de difícil manejo. Se presenta el caso de una mujer de 21 años con ese síndrome, acondroplasia, escoliosis severa e infección respiratoria los días previos a la interrupción exitosa de su embarazo mediante cesárea. El manejo requirió una cuidadosa evaluación preoperatoria y disponibilidad inmediata de dispositivos alternativos para el manejo de la vía aére...

El aluminio en el suelo y algunas estrategias de manejo

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Fabio Emilio Forero-Ulloa

2011-02-01

Full Text Available El  suelo  está  compuesto por diversos  elementos entre  los que  se destaca el aluminio, como un metal que, en condiciones  normales,    no  afecta  el desarrollo de las plantas,  pero en suelos ácidos  es un factor limitante en el crecimiento de la mayoría de especies vegetales,  con una afectación cercana al 50% del área sembrada  en el ámbito mundial. En Colombia  cerca del  85% de  los  suelos  son ácidos,  por lo cual es  necesario buscar estrategias de manejo  y  permitir  que  estos  suelos  sean adecuados para  obtener producción  agrícola, máxime  si  en nuestro  territorio existen diversos tipos  de  suelos,  como  consecuencia  de  los diferentes materiales parentales que,  al final, son necesarios    tener en cuenta para  implementar el manejo estratégico del aluminio.

Desempenho de vacas de corte Purunã submetidas a diferentes manejos de amamentação

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Ivan César Furmann Moura

2014-01-01

Full Text Available O objetivo deste trabalho foi avaliar o desempenho ponderal e reprodutivo de vacas de corte submetidas a diferentes manejos de amamentação. Durante a estação de monta, de 85 dias, foram avaliadas 161 vacas de corte da raça Purunã, de acordo com os seguintes manejos de amamentação: desmame precoce, vacas separadas dos seus bezerros aos 75 dias pós-parto; amamentação controlada, vacas separadas de seus bezerros aos 75 dias de idade, mas colocadas para amamentar uma vez ao dia durante a estação de monta; e desmame convencional, vacas mantidas com seus bezerros ao pé até o final da estação de monta, aos 160 dias de idade dos bezerros, em média. As taxas de prenhez não foram significativamente afetadas pelos manejos de amamentação, tendo sido de 97% no desmame precoce, de 96% na amamentação controlada e de 90% no desmame convencional. No entanto, o desmame precoce resultou em menor eficiência reprodutiva (28,26 kg, quando comparado à amamentação controlada (35,09 kg e ao desmame convencional (35,34 kg. Vacas de corte mantidas em boas condições corporais ao parto e ao início da estação de monta apresentam alta taxa de fertilidade, independentemente do manejo de amamentação dos bezerros.

Perturbed black holes in Einstein-dilaton-Gauss-Bonnet gravity: stability, ringdown, and gravitational-wave emission

CERN Document Server

Blázquez-Salcedo, Jose Luis

2016-01-01

Gravitational waves emitted by distorted black holes---such as those arising from the coalescence of two neutron stars or black holes---carry not only information about the corresponding spacetime but also about the underlying theory of gravity. Although general relativity remains the simplest, most elegant and viable theory of gravitation, there are generic and robust arguments indicating that it is not the ultimate description of the gravitational universe. Here we focus on a particularly appealing extension of general relativity, which corrects Einstein's theory through the addition of terms which are second order in curvature: the topological Gauss-Bonnet invariant coupled to a dilaton. We study gravitational-wave emission from black holes in this theory, and (i) find strong evidence that black holes are linearly (mode) stable against both axial and polar perturbations; (ii) discuss how the quasinormal modes of black holes can be excited during collisions involving black holes, and finally (iii) show that...

Anorexia nerviosa: Manejo nutricional en pediatría

OpenAIRE

Miranda-Sánchez, Sergio

2010-01-01

La anorexia nerviosa es un padecimiento cuya incidencia y prevalencia van en aumento. Actualmente, las edades de presentación son cada vez más tempranas, por lo que es un tema de mucha importancia para la práctica pediátrica general. El manejo debe ser multidisciplinario. Es importante involucrar a la familia en el tratamiento por medio de terapia familiar. La primera tarea en el abordaje clínico es detectar criterios de hospitalización. Una vez iniciada la terapia se debe vigilar el surgimie...

O consultor e o manejo de clima grupal

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Edela Lanzer Pereira de Souza

Full Text Available O trabalho aborda o manejo de clima como atividade deliberada, passível de treinamento. Requer capacitação conceitual, técnica e humana. Inicialmente é feita uma resenha bibliográfica sobre as abordagens de clima. Depois são analisados alguns momentos críticos, a saber: os contatos iniciais, a manutenção do clima, depressões e conflitos, brincadeiras e risos. Finalmente são tratados alguns estereótipos profissionais que dificultam a empatia entre consultor e clientes.

Proyecto: Estrategias de manejo de desechos peligrosos industriales en el Parque Industrial de Cartago

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Hilda Quesada

Full Text Available El presente artículo se refiere a la problemática que existe en nuestro país con respecto a la gestión adecuada de los desechos peligrosos industriales y hace referencia a los aportes que el Instituto Tecnológico de Costa Rica (ITCR puede realizar a través de su Centro de Investigación en Protección Ambiental (CIPA. El CIPA se encuentra desarrollando el proyecto: “Eestrategias de manejo de desechos peligrosos industriales en el Parque Industrial de Cartago”, cuyo objetivo promover el establecimiento de un plan de manejo integral y tratamiento de los desechos peligrosos industriales en algunas industrias del Parque Industrial de Cartago, que sirva de modelo para replicar en otros parques industriales.

IMPACTOS DE LAS CARRETERAS SOBRE LA FAUNA SILVESTRE Y SUS PRINCIPALES MEDIDAS DE MANEJO

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María del Pilar Arroyave

Full Text Available El objetivo de este artículo es presentar el impacto de los proyectos viales sobre la fauna silvestre y evaluar las medidas de manejo de estos efectos. Se revisó y analizó la información de diversos estudios realizados en el mundo, al igual que algunos estudios de impacto ambiental de carreteras que se han desarrollado en Antioquia. Se encontró que los principales impactos son el atropellamiento, el aislamiento de poblaciones y el cambio en los patrones reproductivos de la fauna; esto trae como consecuencia la disminución de las poblaciones de especies de fauna silvestre. También se plantean las estrategias comúnmente implementadas para el manejo de los impactos.

Propriedades físicas do solo em função de manejos em lavouras de cafeeiro conilon

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Teóphilo André Maretto Effgen

2012-06-01

Full Text Available Os solos de uso agrícola estão sujeitos a modificações em suas propriedades, de acordo com o tipo de uso e sistemas de manejo adotados. Este trabalho teve como objetivo avaliar, em diferentes locais de amostragem, as propriedades físicas de solos cultivados com lavouras cafeeiras, sob distintos manejos, no sul do Estado do Espírito Santo. Foram realizadas amostragens nas camadas de 0,00-0,20 m e 0,20-0,40 m, na parte superior da projeção da "saia" do cafeeiro, em relação ao sentido de declive do terreno. Foram utilizadas, para o estudo, lavouras representativas da região sul do Estado, apresentando a mesma classe de solo (Latossolo Vermelho-Amarelo distrófico, relevo forte ondulado, tendo os seguintes manejos: M1 - irrigação por gotejamento, calagem a cada dois anos, adubação, roçadas e uso da palha de café; M2 - adubação, roçadas e capinas; M3 - capinas e roçadas. Em cada manejo, foram avaliados os seguintes locais de amostragem: TS - terço superior, TM - terço médio; TI - terço inferior, ao longo do declive. As propriedades físicas avaliadas foram: densidade do solo, porosidade total, macroporosidade, microporosidade e resistência do solo à penetração. Para as condições experimentais, a resistência do solo à penetração, a macroporosidade e a microporosidade mostraram-se importantes indicadores físicos da qualidade do solo, influenciados pelo manejo, local de amostragem e camada avaliada.

ATROFIA MUSCULAR ESPINAL: MANEJO RESPIRATORIO EN LA PERSPECTIVA DE LOS RECIENTES AVANCES TERAPÉUTICOS

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Dra. María Angélica Palomino

2017-01-01

Full Text Available La atrofia muscular espinal (AME es la primera causa genética de mortalidad en lactantes. La severidad de las manifestaciones clínicas es un continuo, con tres principales subtipos en pediatría: AME1 que se presenta en recién nacidos y no logran sentarse, AME2 en niños que no logran caminar pero sí sentarse y AME3 que logran caminar. La complicación más seria es la insuficiencia respiratoria. El enfoque del manejo respiratorio es preventivo, con toma de decisiones anticipadas por parte de los cuidadores, que incluye optimizar el manejo de la tos, evitar la deformación de la caja torácica y permitir un desarrollo pulmonar adecuado, tratar la hipoventilación, manejar oportunamente las infecciones respiratorias, el trastorno de deglución, el reflujo gastroesofágico y la malnutrición. A las puertas del desarrollo de tratamientos específicos modificadores de la enfermedad, mediante oligonucleótidos antisentido o vectores genéticos entre otros, los cuidados en AME con enfoque multidisciplinario nos imponen nuevos desafíos donde los cuidados respiratorios deberían estar de acuerdo a lo sugerido en consensos de estándar de manejo, optimizando sus condiciones globales a la espera de tratamientos más específicos.

BIOECOLOGIA E MANEJO DA BROCA-DA-ERVA-MATE, Hedypathes betulinus (KLUG, 1825 (COLEOPTERA: CERAMBYCIDAE

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Jerson V. Carús Guedes

2006-07-01

Full Text Available A cultura da erva-mate (Ilex paraguariensis A.St.-Hil. apresenta grande importância social, cultural e econômica no sul do Brasil. Com a formação de povoamentos puros e o aumento da área de plantio, observou-se um aumento populacional de muitas espécies de insetos. Dentre os insetos-praga, a broca-da-erva-mate, Hedypathes betulinus (Klug, 1825 (Coleoptera: Cerambycidae, é a de maior importância econômica, em razão dos danos que causa e seu difícil controle. A fase larval ocorre no interior dos galhos e troncos das plantas, dificultando sua detecção e manejo. O manejo cultural e o mecânico são os mais indicados, como a coleta de adultos, poda e queima de partes atacadas da planta, nutrição equilibrada, densidade adequada de plantas e manutenção de áreas com vegetação nativa ou ainda a introdução do policultivo. Com essas técnicas, espera-se um maior equilibrio do agroecossistema e, com isso, a diminuição dos insetos-praga a um nível aceitável. Portanto, o objetivo deste trabalho é reunir e discutir as informações da bioecologia e manejo da broca-da-erva-mate.

Astronaut Joseph Kerwin takes blood sample from Astronaut Charles Conrad

Science.gov (United States)

1973-01-01

Scientist-Astronaut Joseph P. Kerwin (right), Skylab 2 science pilot and a doctor of medicine, takes a blood sample from Astronaut Charles Conrad Jr., Sylab 2 commander, as seen in this reproduction taken from a color television transmission made by a TV camera aboard the Skylab 1 and 2 space station cluster in Earth orbit. The blood sampling was part of the Skylab Hematology and Immunology Experiment M110 series.

Educar na autenticidade em Charles Taylor = Educating in the authenticity in Charles Taylor

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Foschiera, Rogério

2009-01-01

Full Text Available Analiso a perspectiva tayloriana da autencidade através de uma hermenêutica de suas principais obras para propor o significado de educar na autencticidade a partir de Charles Taylor. Com autencidade e ontologia moral Taylor apresenta uma antropologia ancorada na moral e na ontologia. Com autencidade e epistemologia se percebe que a perspectiva da autencidade não exclui o paradigma científico, mas necessita de outros paradigmas, principalmente do hermenêutico. Com autencidade e linguagem evidencio a compreensão de Taylor sobre a natureza da linguagem e o destaque que ele dá á definição de ser humano como "animal portador de logos", bem como o significado e as decorrências da perspectiva expressivista. Duas políticas: a da igualdade de direitos de todos e a do reconhecimento das diferenças estão integradas na perspectiva tayloriana da autencidade. Necessariamente, o ser humano, para ser autêntico, estará em constante referência a horizontes de sentido que transcendem o indivíduo, é o que apresento com autencidade e transcendência

ECONOMIC VIABILITY OF NUTRIENT MANAGEMENT PRACTICES FOR BANANA CROP VIABILIDADE ECONÔMICA DE MANEJOS NUTRICIONAIS NA CULTURA DE BANANA

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Maura Seiko Tsutsui Esperancini

2011-04-01

Full Text Available Proper fertilizing management, in order to optimize fruit quality and yield, is a relevant stage on the production process to the rural entrepreneur profitability. So, the aim of this study was to analyze the economic feasibility of five nutrient management practices for banana crop, Cavendish cultivars, in the Médio Paranapanema region, São Paulo State, Brazil, in 2009/2010. The effective operational cost (EOC and total operational cost (TOC structures and three profitability indicators were used. Significant differences were observed among the management systems, and the system that resulted in major economic advantage to the producer provided an average profit rate 25.6% higher than other treatments, with total net revenue about 29.5% higher than other management types. The unitary cost was lower for the most profitable nutrient management practice, although the yield was 9.5% lower than the management system that presented the highest yield levels.

KEY-WORDS: Musa sp.; banana crop; fertilization; production cost; profitability.

O manejo adequado da adubação, visando à otimização da produtividade e qualidade dos frutos, é uma etapa representativa do processo produtivo para rentabilidade do empreendedor rural. Neste contexto, objetivou-se analisar a viabilidade econômica de cinco tipos de manejo nutricional de bananeiras de cultivares do subgrupo Cavendish, na região do Médio Paranapanema (SP, em 2009/2010. Foram utilizadas estruturas do custo operacional efetivo (COE e custo operacional total (COT e três indicadores de rentabilidade. Diferenças significativas foram observadas entre os manejos, sendo que o sistema de manejo que resultou em maior vantagem econômica para o produtor proporcionou índice médio de lucratividade 25,6% superior aos demais

Stable exponential cosmological solutions with zero variation of G in the Einstein-Gauss-Bonnet model with a Λ-term

Energy Technology Data Exchange (ETDEWEB)

Ernazarov, K.K. [RUDN University, Institute of Gravitation and Cosmology, Moscow (Russian Federation); Ivashchuk, V.D. [RUDN University, Institute of Gravitation and Cosmology, Moscow (Russian Federation); Center for Gravitation and Fundamental Metrology, VNIIMS, Moscow (Russian Federation)

2017-02-15

A D-dimensional gravitational model with a Gauss-Bonnet term and the cosmological term Λ is considered. By assuming diagonal cosmological metrics, we find, for a certain fine-tuned Λ, a class of solutions with exponential time dependence of two scale factors, governed by two Hubble-like parameters H > 0 and h < 0, corresponding to factor spaces of dimensions m > 3 and l > 1, respectively, with (m,l) ≠ (6,6), (7,4), (9,3) and D = 1+m+l. Any of these solutions describes an exponential expansion of three-dimensional subspace with Hubble parameter H and zero variation of the effective gravitational constant G. We prove the stability of these solutions in a class of cosmological solutions with diagonal metrics. (orig.)

Advertising eugenics: Charles M. Goethe's campaign to improve the race.

Science.gov (United States)

Schoenl, William; Peck, Danielle

2010-06-01

Over the last several decades historians have shown that the eugenics movement appealed to an extraordinarily wide constituency. Far from being the brainchild of the members of any one particular political ideology, eugenics made sense to a diverse range of Americans and was promoted by professionals ranging from geneticists and physicians to politicians and economists.(1) Seduced by promises of permanent fixes to national problems, and attracted to the idea of a scientifically legitimate form of social activism, eugenics quickly grew in popularity during the first decades of the twentieth century. Charles M. Goethe, the land developer, entrepreneur, conservationist and skilled advertiser who founded the Eugenics Society of Northern California, exemplifies the broad appeal of the eugenics movement. Goethe played an active role within the American eugenics movement at its peak in the 1920s. The last president of the Eugenics Research Association,(2) he also campaigned hard against Mexican immigration to the US and he continued open support for the Nazi regime's eugenic practices into the later 1930s.(3) This article examines Goethe's eugenic vision and, drawing on his correspondence with the leading geneticist Charles Davenport, explores the relationship between academic and non-academic advocates of eugenics in America. Published by Elsevier Ltd.

Dublin and Irish politics in the age of Charles Lucas.

Science.gov (United States)

Hill, J

2015-09-01

In addition to his contributions to medicine, Charles Lucas had a long career in politics, starting in the 1740s as a guild representative on the lower house of Dublin corporation, and culminating in his election to the Irish House of Commons in 1761. By examining the background in Dublin and Irish politics, this paper explores Lucas' impact on the electorate, and how it was that he was able to win a parliamentary seat in Dublin and retain it for a decade while he campaigned in support of a range of important Patriot issues. Lucas had none of the qualifications that would normally be required for a successful politician. His father held some land, but as a younger son who had to make a living, Charles was apprenticed to a Dublin apothecary. Nor did he have the political connections that might have compensated for a lack of land, wealth, or status. But Lucas possessed other advantages, notably an education that enabled him to read the city's medieval charters, identifying areas where the Dublin freemen had lost 'ancient rights', and some experience of publishing, so that he could appeal to the electorate. Lucas' remarkable political success stemmed from both local circumstances and his own personal qualities.

Anisotropic, time-dependent solutions in maximally Gauss-Bonnet extended gravity

International Nuclear Information System (INIS)

Kitaura, Takayuki; Wheeler, J.T.

1991-01-01

In an arbitrary number of dimensions, we find the full exact anisotropic, time-dependent, diagonal-metric solutions to maximally Gauss-Bonnet extended gravity theory. This class of theories for which the lagrangian is an arbitrary linear combination of dimensionally extnded Euler forms, is the most general gravitational theory in which the field equations contain no more than second derivatives of the metric. We show that the space-time exponentially approaches an asymptotic state of constant, anisotropic curvature and prove three theorems concerning two generic types of singularities. The first theorem gives conditions for the existence of Kasner-like curvature singularities. For these the metric diverges as tsup(p i ) where Σp i = 2 k max -1 and k max is the highest power of the curvature in the lagrangian. Other critical point singularities can arise from the polynomial nature of the theory. The remaining theorems demonstrate that the generic solution is extendible at all of these other critical points and that the generic critical points occur at moments of extremal volume density of space-time. We give an explicit coordinate transformation which produces a smooth extension through the critical point. The space-time may therefore alternately expand and contract for many cycles before expanding forever or contracting to a singularity. Many particular cases are treated in detail including several power series solutions, the generalized Kasner solution to general relativity with or without cosmological constant, the perturbative solution for quadratic string gravity, and five-dimensional extended gravity. (orig.)

ANÁLISIS DEL MANEJO DE RESIDUOS SÓLIDOS HOSPITALARIOS EN EL HOSPITAL NACIONAL CARLOS ALBERTO SEGUÍN ESCOBEDO, ESSALUD. AREQUIPA, 2009

OpenAIRE

ARANA ZEVALLOS, MARÍA ELENA

2014-01-01

ANTECEDENTES ASPECTOS LEGALES DEFINICIÓN DE RESIDUOS SOLIDOS HOSPITALARIOS CLASIFICACIÓN DE LOS RESIDUOS SOLIDOS HOSPITALARIOS RESIDUOS BIOMÉDICOS CICLO DEL MANEJO DE RESIDUOS SOLIDOS HOSPITALARIOS DIAGNOSTICO ETAPAS DEL MANEJO DE LOS RESIDUOS SOLIDOS HOSPITALARIOS ACONDICIONAMIENTO SEGREGACIÓN Y ALMACENAMIENTO PRIMARIO ALMACENAMIENTO INTERMEDIO TRANSPORTE INTERNO ALMACENAMIENTO FINAL RECOLECCIÓN EXTERNA DISPOSICIÓN FINAL TECNOLOGÍAS DE TRATAMIENTO DE RESIDUOS SOLIDOS HOSPITALARIOS CRITERIOS ...

MANEJO DE RESIDUOS SÓLIDOS EN LOS ESTABLECIMIENTOS DE SALUD DEL MINSA EN EL DISTRITO DE HUNTER. AREQUIPA. 2012

OpenAIRE

ALCOCER NUÑEZ, JULIO

2015-01-01

LA CONTAMINACIÓN Y LOS RESIDUOS CONTAMINACIÓN AMBIENTAL CONCEPTO CONTAMINACIÓN AMBIENTAL COMÚN PRINCIPALES EFECTOS DE LOS CONTAMINANTES SOBRE LA SALUD TIPOS DE CONTAMINACIÓN RESIDUOS SÓLIDOS COMPONENTES DE UN PLAN PARA EL MANEJO DE RESIDUOS SÓLIDOS RESIDUOS QUÍMICOS RESIDUOS NUCLEARES RESIDUOS SÓLIDOS EN LOS ESTABLECIMIENTOS DE SALUD DEFINICIÓN DE RESIDUOS SÓLIDO DEFINICIONES DE RESIDUOS HOSPITALARIOS CLASIFICACIÓN DE RESIDUOS DE ESTABLECIMIENTOS DE SALUD MANEJO DE RESIDUOS MITIGACIÓN...

Síndrome de resistencia a la insulina. estudio y manejo

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N. Fernando Carrasco, Dr.

2013-09-01

Full Text Available El síndrome de resistencia a la insulina, actualmente más conocido como síndrome metabólico (SM, es una condición clínica de alta prevalencia en Chile. Por el mayor riesgo de enfermedades cardiovasculares y diabetes asociado a esta condición, en la práctica clínica es relevante su detección precoz y manejo. La resistencia a la insulina (RI es una condición metabólica central en la etiopatogenia del SM y su diagnóstico puede efectuarse con mediciones de insulinemia y glicemia en ayuno o con la prueba de tolerancia oral a la glucosa con curva de insulinemia. Existe acuerdo que los mejores resultados del manejo del SM y de la RI se logran con cambios en estilo de vida, incluyendo modificaciones en la dieta y en el patrón de actividad física junto con reducción en el peso y grasa corporal. Algunas terapias farmacológicas orientadas a mejorar la sensibilidad a la insulina han sido recomendadas en consensos internacionales, especialmente en pacientes con elevado riesgo de enfermedad cardiovascular o de diabetes tipo 2, cuando fracasan las terapias no farmacológicas.

Congenital pleuroperitoneal hernia presenting as gastrothorax in five cavalier King Charles spaniel dogs.

Science.gov (United States)

Rossanese, M; Pivetta, M; Pereira, N; Burrow, R

2018-04-30

Five cavalier King Charles spaniels were examined for acute onset of respiratory distress. Thoracic radiographs demonstrated diaphragmatic hernia and tension gastrothorax, visible as a distended stomach occupying the left caudal thoracic cavity. Exploratory midline coeliotomy confirmed congenital pleuroperitoneal diaphragmatic hernia with herniation and dilatation of the stomach. The hernia configuration was consistent in all cases, with a defect affecting the left diaphragmatic crus. Congenital pleuroperitoneal diaphragmatic hernia is a rare condition caused by a defect in the dorsolateral diaphragm. Defects of the left crus of the diaphragm could result in the herniation of the stomach into the thoracic cavity with possible subsequent tension gastrothorax. Cavalier King Charles spaniels may have a predisposition to this condition. Tension gastrothorax is an acute life-threatening consequence of gastric herniation through a diaphragmatic defect that must be promptly recognised and surgically treated. © 2018 British Small Animal Veterinary Association.

Manejo prehospitalario del síndrome coronario agudo

OpenAIRE

Borrego Alfaraz, Cristina

2017-01-01

[EN] La cardiopatía isquémica, concretamente el síndrome coronario agudo, es una de las principales causas de mortalidad a nivel mundial. Además, con el envejecimiento de la población, su incidencia aumentará en las próximas décadas. Es por ello por lo que el conocimiento sobre este tema y la mejora en su abordaje se tornan imprescindibles. De esta manera, el manejo prehospitalario del síndrome coronario agudo se caracteriza por su rápida detección a través de la interpretación de un el...

Modelos de decisiones en el manejo de la cobertura arbórea en fincas ganaderas de Nariño

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Diego Andrés Muñoz

2014-12-01

Full Text Available Las decisiones de los agricultores en sus fincas, influyen directa o indirectamente sobre la cobertura arbórea que afectan su estructura, densidad y composición. El presente estudio se desarrolló en los municipios de Guachucal y Cumbal, departamento de Nariño, Colombia con el propósito de identificar los criterios y decisiones claves que toman los agricultores, en el manejo de la cobertura arbórea en fincas ganaderas productoras de leche. Las decisiones, fueron modeladas y simuladas en el programa Netica 2.6. Con las respuestas obtenidas se diseñaron modelos generales de decisión, donde se obtuvo cuatro eventos principales y de mayor influencia en el manejo de la cobertura arbórea, 1 evento poda, 2 evento control de maleza, 3 evento siembra de árboles y 4 evento aprovechamiento de árboles. Las frecuencias, permitieron estimar la probabilidad de cada decisión e influencia de las variables con respecto a los eventos para su modelación y simulación. Además, para profundizar sobre el proceso de toma de decisiones se plantearon escenarios relacionados con las condiciones agroecológicas de la finca, el manejo de la unidad productiva y el entorno en el que opera la finca. Así mismo se analizaron las principales limitantes para el manejo y establecimiento de la cobertura arbórea. El evento de mayor importancia para el manejo de la cobertura arbórea es la poda, debido a su valor en la obtención de leña como combustible, este factor influye en la zona para que las cobertura arbóreas se incrementen como cercas vivas.

Microorganismos patógenos en Jatropha curcas Linnaeus. Estrategias potenciales para su manejo

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O Alonso

Full Text Available Jatropha curcas Linnaeus (piñón botija, considerada la gran promesa verde para el biodiesel, es una planta de la que existen considerables incógnitas en el ámbito científico desde el punto de vista agronómico, sobre todo en lo referente a los microorganismos causantes de enfermedades, entre las que sobresale la conocida como damping off (estrangulamiento de las plántulas que es provocada por varias especies de hongos. Por ello, el objetivo de este artículo es compilar la mayor cantidad de información sobre los principales microorganismos fitopatógenos que afectan a J. curcas, así como las posibles estrategias para su manejo, con el fin de obtener rendimientos eficientes y rentables de este cultivo energético en Cuba. Se encontraron 48 agentes causales de enfermedades; los más representativos fueron los hongos, entre los que predominan los que producen la roya y el mildiu polvoso, fundamentalmente. En cuanto al manejo fitosanitario, se citan las medidas culturales preventivas y las químicas, como curativas. De ahí que en Cuba, al igual que en otros países donde se cultiva el piñón botija, sea imprescindible conocer los fitopatógenos que pueden reducir los rendimientos de dicha planta, para después implementar un sistema de manejo fitosanitario que contribuya a evitar pérdidas considerables en la producción de biodiesel como producto final.

Konsep Dasar Semiotika Dalam Komunikasi Massa Menurut Charles Sanders Pierce

OpenAIRE

Suherdiana, Dadan

2008-01-01

Sign or symbol in mass communication is not something with without makna. Nevertheless, it is not easy for anyone to can comprehend that sign. Minimally, that is a method for it, is named semiotic. Charles Sanders Pierce introduce pragmatism for this method. For him, semiotics have three researches area: syntactic semiotic, semantic semiotic and pragmatic semiotic. Sintaktic semiotic, teach the relation between sign with others sign; semantic semiotic, teach the relation and consequence in in...

Anton's Syndrome due to Bilateral Ischemic Occipital Lobe Strokes.

Science.gov (United States)

Zukić, Sanela; Sinanović, Osman; Zonić, Lejla; Hodžić, Renata; Mujagić, Svjetlana; Smajlović, Edina

2014-01-01

We present a case of a patient with Anton's syndrome (i.e., visual anosognosia with confabulations), who developed bilateral occipital lobe infarct. Bilateral occipital brain damage results in blindness, and patients start to confabulate to fill in the missing sensory input. In addition, the patient occasionally becomes agitated and talks to himself, which indicates that, besides Anton's syndrome, he might have had Charles Bonnet syndrome, characterized by both visual loss and hallucinations. Anton syndrome, is not so frequent condition and is most commonly caused by ischemic stroke. In this particular case, the patient had successive bilateral occipital ischemia as a result of massive stenoses of head and neck arteries.

Guía práctica para la identificación y manejo de plagas en hortalizas

OpenAIRE

Barrios G., Fernando; Gonzalez D., Fernando; Figueroa P., Adalberto

2010-01-01

Guía práctica para la identificación y manejo de plagas en hortalizas La guía práctica comprende una descripción de los insectos, ácaros y moluscos que atacan los cultivos hortícolas en nuestro país. Se registraron 33 especies hortícolas pertenecientes a 10 familias botánicas que por su afinidad bioquímica atraen las mismas plagas. Se describieron 52 plagas con las respectivas recomendaciones de manejo. También se presentan las alternativas para un control eficaz con enfoque ecológico....

El manejo de la caoba define la agenda de conservación.

Science.gov (United States)

A. E. Lugo

2005-01-01

Los artículos en este número especial documentan un cambio en el enfoque de aprovechamiento maderero, de la explotación minera al manejo sostenible por parte de las comunidades rurales que ahora cuentan con más información y conocimiento de sus derechos.

Plan de manejo sostenible de tierra para la producción de leche en la UBPC Aguadita, Cienfuegos, Cuba

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Eligia de la C Cuellar

Full Text Available Se realizó un estudio en la UBPC Aguadita, del municipio Rodas _provincia Cienfuegos, Cuba_, con el objetivo de elaborar un plan de manejo sostenible del suelo para incrementar la producción de leche. Se utilizó la guía contenida en el manual de procedimientos para la implementación del manejo sostenible de tierra. Los pasos de la guía permitieron concebir una investigación no experimental, de tipo correlacional/múltiple, en la que se utilizaron métodos teóricos y prácticos con sus correspondientes técnicas (entrevistas, encuestas, revisión documental, observación directa; y se realizaron mediciones en el lugar, con la aplicación de diez herramientas metodológicas. Se demostró que la baja producción de leche en la UBPC es causada fundamentalmente por la degradación de los suelos, la mala calidad de los pastos y la deficiente gestión del conocimiento, lo que coincide con la principal barrera para la aplicación del manejo sostenible de tierra. A partir de estos resultados se elaboró el plan de manejo sostenible, como herramienta que contribuye a desarrollar acciones que mitiguen el impacto negativo de la degradación de suelos en el rendimiento lechero de la unidad.

Inhibidores de la paraproteína convertasa subtilisina/kexina tipo 9: una alternativa de manejo para las dislipidemias

OpenAIRE

Beatriz Wills-Sanín; Alejandra Rincón; Ana Cristina Montenegro; Andrés F. Buitrago-Sandoval

2017-01-01

Las guías de la práctica clínica internacionales recomiendan a las estatinas como la terapia de elección para el manejo de la dislipidemia. No obstante, pese a la evidencia acerca de la importancia del manejo de esta condición, existe un porcentaje significativo de los adultos que no logran las metas en los lípidos con las estatinas. Lo anterior ha estimulado el desarrollo de anticuerpos monoclonales que inactivan la paraproteína convertasa subtilisina/kexina tipo 9. Estos medicamentos han si...

Desarrollo de un sistema de inventarios para el manejo de desechos

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Yahaira Atencio Gómez

2005-05-01

Full Text Available A diferencia de cualquier otro proceso productivo, el manejo de los desechos requiere un procedimiento no convencional para el Control de Inventarios, ya que en las líneas de producción regulares se cuenta con materias primas que pasan por una transformación, del cual finalmente se obtiene un producto terminado y desechos. Véase figura 1. Para el caso del manejo de desechos, se realiza una operación inversa al proceso productivo habitual, ya que de los desechos obtenidos al final de la producción, se generan materias primas para micros, medianas y pequeñas empresas. Véase figura 2. Por lo tanto, los desechos que se reciben originalmente son procesados mediante los diferentes procedimientos desarrollados, de los cuales se obtiene materia prima (reciclada o reutilizada y los desechos que no pueden ser recuperados. Pero ¿cómo llegan estos desechos al proceso de recuperación? Esta es precisamente la razón por la cual no es tan sencillo diseñar, desarrollar e implementar un sistema con el cual llevar los registros de materiales que ingresan y sus posteriores egresos (venta o desecho.

DIAGNÓSTICO PRELIMINAR, BASE PARA LA CONSTRUCCIÓN DE UN PROGRAMA DE MANEJO DE RESIDUOS SÓLIDOS EN LA UNIVERSIDAD DE SAN BUENAVENTURA, CARTAGENA

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RÍOS MONTES KARINA ANDREA

2012-07-01

Full Text Available Los residuos sólidos pueden generar impactos negativos al ambiente y al ser humano por causa de un manejo inadecuado. Las universidades deben contemplar su manejo en las etapas de generación, recolección y disposición final, e incluir su valoración. Se realizó un estudio descriptivo de corte transversal, cuyo objetivo fue realizar un diagnóstico preliminar sobre el manejo de residuos sólidos, incluyendo percepción, conocimiento y recomendaciones dadas por la comunidad universitaria, para contribuir con la elaboración final de un programa de manejo integral de residuos sólidos en la institución.Se aplicó un instrumento a una muestra probabilística, conformada por una población de estudiantes (84%, docentes (8,8% y personal administrativo (7,1%. Los resultados indican que el 59,9% conoce el manejo de RS, y sólo el 29,8% recicla. Los medios masivos de comunicación, con un 49,8%, son el principal canal para conocer de éstos. El 72,1% recicla por conciencia o compromiso ambiental, siendo el papel/cartón (23,5% y plástico (22,6% los más reciclados. El 42,1% recomienda actividades de educación ambiental, el 40,1% rotulación de canecas; y la responsabilidad de su manejo debe incluir a toda la comunidad universitaria, siendo estudiantes- docentes (82,8% y directivos- administrativos (57,6% los pioneros en liderar el proceso.  

Charles I et la voix silencieuse de Eikon Basilike : le silence comme moyen d'expression

OpenAIRE

Chaise-Brun, Vanessa

2017-01-01

La parole de Charles I, de son vivant, reste, malgré ses efforts, une parole vide et non entendue. Le bruit, qu’il s’agisse des cris de la foule ou bien les querelles engendrées par ses opposants, étouffe sa parole. Son discours est un cri face à la foule et à ses opposants, mais un cri impuissant. Pourtant, peut-on affirmer que la parole de Charles I est inexistante ? Eikon Basilike est une parole écrite, un silence qui crie l’innocence du roi. « Faire silence » ne signifie pas se taire mais...

Contexto y pensamiento de Charles Taylor sobre el consenso

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Doris Elena Ospina Muñoz

2017-01-01

Full Text Available El artículo sostiene que el consenso no es un tema de primer orden en la filosofía política de Charles Taylor, pero una lectura orientada al problema puede ofrecer los elementos para establecer una teoría sobre dicha noción e identificar los argumentos para su justificación. Además, se enfatiza en el contexto de discusión que permite introducir la filosofía de Taylor como un modo de pensar sobre el consenso, alternativo al constructivismo.

On stability of exponential cosmological solutions with non-static volume factor in the Einstein-Gauss-Bonnet model

Energy Technology Data Exchange (ETDEWEB)

Ivashchuk, V.D. [VNIIMS, Center for Gravitation and Fundamental Metrology, Moscow (Russian Federation); Peoples' Friendship University of Russia (RUDN University), Institute of Gravitation and Cosmology, Moscow (Russian Federation)

2016-08-15

A (n + 1)-dimensional gravitational model with Gauss-Bonnet term and a cosmological constant term is considered. When ansatz with diagonal cosmological metrics is adopted, the solutions with an exponential dependence of the scale factors, a{sub i} ∝ exp(v{sup i}t), i = 1,.., n, are analyzed for n > 3. We study the stability of the solutions with non-static volume factor, i.e. K(v) = sum {sub k=1}{sup n} v{sup k} ≠ 0. We prove that under a certain restriction R imposed solutions with K(v) > 0 are stable, while solutions with K(v) < 0 are unstable. Certain examples of stable solutions are presented. We show that the solutions with v{sup 1} = v{sup 2} = v{sup 3} = H > 0 and zero variation of the effective gravitational constant are stable if the restriction R is obeyed. (orig.)

Precio y manejo del agua urbana en México

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Gregorio Castro Rosales

2015-01-01

Full Text Available Este trabajo propone evaluar el potencial del precio que pagan los usuarios como ins - trumento para el manejo de la demanda urbana de agua en México. Nuestros resulta - dos basados en un análisis de datos provenientes de cientos de organismos operadores de agua potable del país, revelan que la demanda de agua sí es sensible al precio, tal y como se ha señalado en otros estudios. No obstante, encontramos también que la demanda es aún mucho más sensible al efecto del crecimiento poblacional y económi - co. Por lo tanto, considerando la dinámica demográfica, urbana y económica del país, un aumento en el precio del agua en sí no podría contribuir significativamente a la estabilización de los requerimientos nacionales de extracción de agua para uso urbano. Además, nuestro análisis de los determinantes del precio del agua urbana revela que los organismos operadores pasan sistemáticamente el costo de sus ineficiencias técnicas y financieras a los usuarios, por lo que un aumento en el precio del agua tampoco podría contribuir al saneamiento de sus finanzas. Concluimos que para un manejo efectivo, eficiente y sustentable del uso urbano de agua, resulta imprescindible un cambio de fondo en la manera en que operan los sistemas urbanos de agua.

Charles Bachman Moore (1920-2010)

Science.gov (United States)

Winn, William; Krehbiel, Paul

2011-02-01

Charles B. Moore passed away 2 March 2010 at the age of 89, following a long and varied scientific career in meteorology and the atmospheric sciences. He will be remembered best for his substantial contributions in the field of atmospheric electricity and for the students and faculty he guided as chairman of Langmuir Laboratory for Atmospheric Research and professor of physics at the New Mexico Institute of Mining and Technology. He possessed a unique sense of humor and an excellent memory that served as a reservoir of scientific and historical knowledge. Like many of his generation, Charlie's career was profoundly influenced by the Second World War. Following Pearl Harbor, he interrupted his undergraduate studies in chemical engineering at Georgia Institute of Technology to enlist in the Army Air Corps, where he became the chief weather equipment officer in the 10th Weather Squadron, setting up and operating remote meteorological stations behind enemy lines in the China-Burma-India theater. He served with distinction alongside Athelstan Spilhaus Sr., who had been one of Charlie's instructors in the Army meteorology program.

Compressibilidade de um Latossolo Amarelo distrocoeso não saturado sob diferentes sistemas de manejo da cana-de-açúcar

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Romero Falcão Bezerra de Vasconcelos

2012-04-01

Full Text Available Os sistemas de manejo que promovem adição de resíduos de cana-de-açúcar ao solo podem provocar alterações nos parâmetros de compressibilidade. O objetivo deste trabalho foi investigar o comportamento da compressibilidade de um Latossolo Amarelo distrocoeso dos Tabuleiros Costeiros de Alagoas, considerando a adição de resíduos orgânicos em três diferentes sistemas de manejo com cana-de-açúcar. O trabalho experimental foi realizado na Usina Santa Clotilde, localizada no Estado de Alagoas. Foram escolhidas três áreas em talhões com cana-de-açúcar, sendo investigadas: uma área cultivada sob sistema de manejo irrigado (SMI, uma área sob sistema de manejo de fertirrigação com vinhaça (SMV e uma área sob sistema de manejo com aplicação de vinhaça + torta de filtro (SMVT. Esses sistemas de manejo foram comparados entre si e em relação a uma testemunha-padrão, representada por uma mata nativa (MN. Os três sistemas de manejo sob cultivo da cana-de-açúcar foram implantados quatro anos antes do início da coleta das amostras de solo. Para o ensaio de compressão uniaxial foram coletadas amostras indeformadas, nas profundidades de 0-0,20 e 0,20-0,40 m, com a intervenção de um amostrador metálico. As amostras preparadas foram ensaiadas por compressão uniaxial, nas seguintes umidades gravimétricas: 0,10; 0,14; 0,18; e 0,22 kg kg-1. No ensaio de compressão foram aplicados carregamentos verticais, correspondentes a tensões de 12,5, 25, 50, 100, 200, 400, 800 e 1.600 kPa, e realizadas leituras aos 30 s. Após o ensaio, as amostras foram levadas à estufa, para determinação da umidade gravimétrica. Os resultados foram submetidos à análise de variância e análise de regressão múltipla da tensão de pré-compactação, considerando as seguintes variáveis independentes: densidade do solo (Ds, umidade gravimétrica (Ug, diâmetro médio ponderado de agregados via úmida (DMPu e energia dissipada (Ed. O solo sob mata

IRONY IN CHARLES DICKEN'S OLIVER TWIST

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Ika Kana Trisnawati

2016-05-01

Full Text Available This paper describes the types of irony used by Charles Dickens in his notable early work, Oliver Twist, as well as the reasons the irony was chosen. As a figurative language, irony is utilized to express one’s complex feelings without truly saying them. In Oliver Twist, Dickens brought the readers some real social issues wrapped in dark, deep written expressions of irony uttered by the characters of his novel. Undoubtedly, the novel had left an impact to the British society at the time. The irony Dickens displayed here includes verbal, situational, and dramatic irony. His choice of irony made sense as he intended to criticize the English Poor Laws and to touch the public sentiment. He wanted to let the readers go beyond what was literally written and once they discovered what the truth was, they would eventually understand Dickens’ purposes.

Prints Charles sõdib oma linnakese eest ja halvustajate vastu / Alan Wheatley

Index Scriptorium Estoniae

Wheatley, Alan

1998-01-01

Briti troonipärija prints Charlesi loodud Poundbury uusrajoonist Cornwalli krahvkonnas. 2500 ettenähtud majast on valmis 142. Prints Charlesi eesmärk on järgida rohkem inimeste vajadusi kui planeerimispõhimõtteid. Põhiplaan arhitekt Leon Krier'ilt. Erinevaid arvamusi linnakese kohta, s. h. parlamendi ehituskomitee positiivne hinnang. Prints Charles inglise modernse arhitektuuri kriitikina

Establecimiento de un aula demostrativa del manejo adecuado de desechos sólidos ordinarios, industriales y peligrosos

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Juan Carlos Salas Jiménez

2009-01-01

Full Text Available En este artículo se expone cómo el Centro de Transferencia y Transformación de Materiales (CTTM del (ITCR Instituto Tecnológico de Costa Rica se ha convertido en un aula demostrativa que facilita los procesos de aprendizaje en la temática de desechos sólidos y transferencia de experiencia de los sectores público y privado del país, para buscar alternativas viables desde los puntos de vista ambiental, social y económico. El logro más importante es que las personas y grupos debidamente organizados, que tienen o están iniciando actividades de recuperación de desechos, pueden aprender observando directamente la operación del manejo de los desechos, pueden aprender observando directamente la operación del manejo de los desechos y hacer preguntas muy específicas de acuerdo con sus necesidades, lo cual permite empezar la actividad de manejo de desechos sin cometer errores ya superados.

Three types of superpotentials for perturbations in the Einstein-Gauss-Bonnet gravity

International Nuclear Information System (INIS)

Petrov, A N

2009-01-01

Superpotentials (antisymmetric tensor densities) in the Einstein-Gauss-Bonnet (EGB) gravity for arbitrary types of perturbations on arbitrary curved backgrounds are constructed. As a basis, the generalized conservation laws in the framework of an arbitrary D-dimensional metric theory, where conserved currents are expressed through divergences of superpotentials, are used. Such a derivation is exact (perturbations are not infinitesimal) and is approached when a solution (dynamical) is considered as a perturbed system with respect to another solution (background). Three known prescriptions are elaborated: they are the canonical Noether theorem, the Belinfante symmetrization rule and the field-theoretical derivation. All three approaches are presented in a unique way convenient for comparisons and development. Exact expressions for the 01-component of the three types of the superpotentials are derived in the case when an arbitrary static Schwarzschild-like solution in the EGB gravity is considered as a perturbed system with respect to a background of the same type. These formulae are used for calculating the mass of the Schwarzschild-anti-de Sitter black hole in the EGB gravity. As a background, both the anti-de Sitter spacetime in arbitrary dimensions and a 'mass gap' vacuum, which has no maximal set of symmetries, in five dimensions are considered. Problems and perspectives for future development, including the Lovelock gravity, are discussed.

Estudio del manejo de residuos sólidos en el Relleno Sanitario Doña Juana con el fin de delinear un borrador de propuesta para el manejo integral de residuos sólidos en la ciudad de Bogotá D.C

OpenAIRE

Anzola Parra, Diego Felipe

2015-01-01

Con el presente trabajo se busca realizar una propuesta de solución al sistema de manejo de los residuos sólidos urbanos en el relleno sanitario de Doña Juana en la ciudad de Bogotá, porque los desechos producidos por el consumo humano al no ser tratados de la forma correcta, afectan negativamente a la ciudad, rompen el cirulo vital del desarrollo y desequilibran el medio ambiente. Se realiza un diagnostico histórico al manejo de los residuos sólidos en la ciudad de Bogotá, para poder entende...

Charles Valentine Riley, A Biography: ambition, genius, and the emergence of applied entomology

Science.gov (United States)

Charles Valentine Riley, 1843-1895, was a renowned entomologist and founder of the field of applied or economic entomology. This biography, supported by the scientific collaboration of Dr. Weber, is the first story of his fascinating life at the center of many of the foundational events of American...

Qualidade física de Latossolo Amarelo de tabuleiros costeiros em diferentes sistemas de manejo da cana-de-açúcar

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Romero F. B. de Vasconcelos

2014-04-01

Full Text Available Os atributos físicos do solo são indicativos imprescindíveis quando se pretende avaliar sistemas de manejo. Objetivou-se, nesta pesquisa, estudar as alterações nas propriedades físicas de um Latossolo Amarelo Distrocoeso dos tabuleiros costeiros de Alagoas cultivado com cana-de-açúcar. Foram selecionadas áreas em talhões de produção de cana-de-açúcar. Os tratamentos avaliados corresponderam a área cultivada sob sistema de manejo irrigado (SMI, área sob sistema de manejo fertirrigado com vinhaça (SMFV e área com aplicação de vinhaça + torta de filtro (SMVT, além de área de mata nativa (MN com fragmento de mata atlântica, tomada como referência. Avaliaram-se a densidade do solo, porosidade total do solo, diâmetro médio ponderado dos agregados, condutividade hidráulica, carbono orgânico total, grau de compactação nas profundidades de 0-0,20; 0,20-0,40 e 0,40-0,60 m. Os sistemas de manejo cultivados com cana-de-açúcar que receberam adição de resíduos da cana (SMFV + SMVT apresentaram alterações nas propriedades físicas do solo mais favoráveis ao adequado desenvolvimento desta cultura. Dentre os diferentes sistemas de manejo cultivados com cana-de-açúcar, o que sofreu menor degradação física foi a área sob SMVT, seguido da área sob SMFV.

A percepção dos trabalhadores de enfermagem sobre o manejo dos resíduos químicos perigosos Percepción de los trabajadores de enfermería sobre el manejo de residuos químicos peligrosos Nursing workers' perceptions regarding the handling of hazardous chemical waste

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Taiza Florêncio Costa

2012-12-01

Full Text Available Este estudo objetivou identificar a percepção dos trabalhadores de enfermagem sobre o manejo dos resíduos químicos perigosos no Hospital Universitário da Universidade de São Paulo e elaborar uma proposta para o manejo desses resíduos. Trata-se de pesquisa de abordagem qualitativa, cuja amostra foi intencional, composta por dezoito trabalhadores de enfermagem. A coleta de dados foi realizada por meio da técnica de grupo focal. Com a análise temática foram identificadas quatro categorias que evidenciaram a deficiência de treinamento nas etapas do manejo, como a primeira dificuldade expressa, tendo aparecido ainda o desconhecimento da exposição e impactos, assim como o uso dos equipamentos de proteção individual em detrimento da proteção coletiva, seguidos das sugestões quanto às medidas de competência institucional e dos trabalhadores para o manejo seguro dos resíduos químicos perigosos. Esses dados permitiram recomendar propostas para o manejo adequado dos resíduos químicos perigosos pela enfermagem.Se objetivó identificar la percepción de trabajadores de enfermería sobre el manejo de residuos químicos peligrosos en el Hospital Universitario de la Universidad de São Paulo y elaborar una propuesta para manejar dichos residuos. Investigación cualitativa, muestra intencional, constituida por 18 trabajadores de enfermería. Datos fueran recolectados por técnica de grupo focal. En el análisis temático se identificaron cuatro categorías que evidenciaron la deficiencia de capacitación en las etapas del manejo, como la primera dificultad expresada, habiendo aparecido incluso el desconocimiento sobre la exposición y sus impactos, así como el uso de equipamientos de protección individual en detrimento de la protección colectiva, seguidos de sugerencias respecto de las medidas de competencia institucional y de los trabajadores para el manejo seguro de residuos químicos peligrosos. Dichos datos permitirán recomendar

Experiencia en el manejo del paciente con VIH entre médicos de la Secretaría de Salud

OpenAIRE

Magis-Rodríguez Carlos; Esquivel-Pedraza Lilly; López-Martínez Carlos

1999-01-01

OBJETIVO: Conocer la experiencia que los médicos de la Secretaría de Salud (SSA) han obtenido en el manejo del sujeto infectado por el VIH y en el uso de antirretrovirales. MATERIAL Y MÉTODOS: Se realizó un estudio transversal, con el apoyo del Consejo Nacional para la Prevención y el Control del SIDA (CONASIDA), en marzo-mayo de 1998. Se proporcionaron cuestionarios autoaplicables a médicos de la SSA con experiencia en el manejo clínico del paciente con VIH, al inicio de cinco simposios sobr...

2010 NOAA Ortho-rectified Mosaic from Color Aerial Imagery of LAKE CHARLES (NODC Accession 0075827)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains ortho-rectified mosaic tiles, created as a product from the NOAA Integrated Ocean and Coastal Mapping (IOCM) initiative of LAKE CHARLES. The...

Diagnóstico e Manejo das Lesões Ortopédicas em Pacientes Politraumatizados

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Vinícius Leite Gonzalez

2009-08-01

Full Text Available Concluído o atendimento inicial com a realização das manobras básicas preconizadas pelo ATLS® (Advanced Trauma Life Support, o manejo das fraturas expostas figura entre as prioridades no atendimento inicial ortopédico em politraumatizados. Lavagem abundante, desbridamento adequado, profilaxia antitetânica e antibioticoterapia intravenosa precoce e de amplo espectro são fundamentais para o adequado manejo das mesmas. Fraturas da pelve e do quadril, francamente relacionadas a traumas de alta energia, são as únicas que, por estarem ligadas a grandes sangramentos retroperitoniais, podem levar ao óbito logo após o trauma, configurando emergências traumatológicas. As fraturas em membro inferior apresentam alta morbidade, sendo as de tíbia as consideradas mais frequentes dentre as expostas e em ossos longos. Embora as de fêmur se apresentem com menor frequência, acabam por deixar sequelas mais importantes. Diferentemente destas, as fraturas de escápula, clavícula, rádio e ulna podem receber um manejo simples de redução e contenção, requerendo apenas em casos particulares de intervenções cirúrgicas. A avaliação radiológica no politraumatizado jamais deve interromper as manobras de reanimação. Duas incidências radiográficas ortogonais costumam ser suficientes para a visualização de lesões ortopédicas. Outros exames normalmente ficam reservados para um segundo tempo do atendimento na avaliação de estruturas e lesões de maior complexidade.

MANEJO DE DEJETOS SÓLIDOS DE POEDEIRAS PELO PROCESSO DE BIODIGESTÃO ANAERÓBICA

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Carlos Fernando Lemos

2012-07-01

Full Text Available As indústrias avícolas de poedeiras, além de ovos, geram anualmente um grande volume de resíduos na forma de esterco. O esterco de ave poedeira é o principal resíduo gerado na indústria de produção de ovos e requer uma infraestrutura para o tratamento adequado. Sendo assim, o objetivo desta revisão visa abordar o manejo de resíduos sólidos de poedeira, em particular com o uso do biodigestor como forma de minimizar os impactos ambientais negativos causados pela atividade avícola. Nesse sentido, ressalta-se que a biodigestão anaeróbica ajuda a minimizar os impactos negativos que são gerados ao meio ambiente, reduzindo assim os riscos ambientais e melhorando a qualidade de vida. Salienta-se, todavia, que, existem casos ainda em que estes resíduos têm sido utilizados como fertilizantes, mas sem prévio tratamento e controle sanitário antes da aplicação no solo. Os dejetos de aviários apresentam o potencial de ser tanto um recurso como um poluente. Em resumo, sob o aspecto das práticas adequadas de manejo dos resíduos, o biodigestor é uma alternativa para o tratamento do esterco de ave poedeira. Conclui-se que o manejo e tratamento de resíduos sólidos de poedeiras pelo processo de biodigestão anaeróbica representa uma forma ambientalmente recomendável.

A strange horn between Paolo Mantegazza and Charles Darwin.

Science.gov (United States)

Garbarino, Carla; Mazzarello, Paolo

2013-09-01

During the preparation of an exhibition in Pavia dedicated to the centennial anniversary of the death of the Italian Pathologist Paolo Mantegazza, a strange cheratinic horn was found at the Museum for the History of the University of Pavia labelled as 'spur of a cock transplanted into an ear of a cow.' After some historical investigation, we found this strange object was at the centre of a scientific correspondence between Mantegazza and Charles Darwin, who made reference to it in his book The Variation of Animals and Plants under Domestication. Copyright © 2013 Elsevier Ltd. All rights reserved.

Compactabilidade de um Latossolo Amarelo distrocoeso dos tabuleiros costeiros de Alagoas sob diferentes sistemas de manejo da cana-de-açúcar

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Romero Falcão Bezerra de Vasconcelos

2012-04-01

Full Text Available A compactação do solo agrícola é um fenômeno de grande interesse para a Ciência do Solo. O estudo investigativo de diferentes sistemas de manejo visando encontrar aquele que degrade menos o solo é o objetivo maior da pesquisa sobre o comportamento mecânico do solo. De maneira geral, para um mesmo nível de energia de compactação, quanto maior o teor de matéria orgânica, menor a densidade máxima do solo e maior a umidade crítica de compactação; consequentemente, o risco de degradação física do solo se reduz. O objetivo deste trabalho experimental foi estudar a compactabilidade de um Latossolo Amarelo distrocoeso dos Tabuleiros Costeiros de Alagoas. Foram selecionadas três áreas em talhões sob cultivo da cana-de-açúcar, representativos de três sistemas de manejo adotados pela Usina Santa Clotilde. Os três sistemas de manejo investigados foram: uma área cultivada sob sistema de manejo irrigado (SMI, uma área sob sistema de manejo de fertirrigação com vinhaça (SMV e uma área com aplicação de vinhaça + torta de filtro (SMVT. Os três sistemas de manejo foram implantados na safra 2003/2004, e a coleta de amostras do solo, realizada em fevereiro de 2007. Esses sistemas foram comparados entre si e em relação a uma testemunha-padrão, representada por uma mata nativa (MN. A densidade máxima do solo e a umidade crítica de compactação foram avaliadas nas profundidades de 0-0,20, 0,20-0,40 e 0,40-0,60 m. Para avaliar a capacidade dos resíduos da cana-de-açúcar em dissipar parte da energia compactante, foram realizados ensaios de Proctor, utilizando quatro níveis de energia de compactação. A avaliação da energia dissipada pelos resíduos foi feita em amostras deformadas apenas da profundidade de 0-0,20 m. O sistema de manejo irrigado (SMI, que não recebeu adição de resíduo da cana-de-açúcar, foi o que apresentou maior densidade máxima do solo e menor umidade crítica de compactação. Entre os

Documento de consenso para la detección y manejo de la enfermedad renal crónica

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Alberto Martínez-Castelao

2014-11-01

Full Text Available La enfermedad renal crónica (ERC es un importante problema de salud pública que puede afectar en sus diferentes estadios a cerca del 10% de la población española y que supone una elevada morbimortalidad, así como un importante consumo de recursos al Sistema Nacional de Salud. Diez sociedades científicas involucradas en el manejo del paciente renal nos hemos puesto de acuerdo para hacer una puesta al día del anterior documento de consenso sobre ERC de 2007. El presente es la edición abreviada del documento general extenso, que puede ser consultado en las páginas Web de cada una de las sociedades firmantes. Contiene los siguientes aspectos: definición, epidemiología y factores de riesgo de la ERC; criterios de diagnóstico, evaluación y estadificación de la ERC, albuminuria y estimación del filtrado glomerular; concepto y factores de progresión; criterios de derivación a nefrología; seguimiento del paciente, actitudes y objetivos por especialidad; prevención de la nefrotoxicidad; detección del daño cardiovascular; actitudes, estilo de vida y tratamiento: manejo de la hipertensión arterial, dislipidemia, hiperglucemia, tabaquismo, obesidad, hiperuricemia, anemia, alteraciones del metabolismo mineral y óseo; seguimiento coordinado por atención primaria-otras especialidades-nefrología; manejo del paciente en tratamiento renal sustitutivo, hemodiálisis, diálisis peritoneal y trasplante renal; tratamiento paliativo de la uremia terminal. Esperamos que sirva de gran ayuda en el manejo multidisciplinar del paciente con ERC, a la vista de las recomendaciones más actualizadas.

Dating fractures and fracture movement in the Lac du Bonnet Batholith

International Nuclear Information System (INIS)

Gascoyne, M.; Brown, A.; Ejeckam, R.B.; Everitt, R.A.

1997-04-01

This report examines and summarizes all work that has been done from 1980 to the present in determining the age of rock crystallization, fracture initiation, fracture reactivation and rates of fracture movement in the Lac du Bonnet Batholith to provide information for Atomic Energy of Canada Limited's (AECL) Canadian Nuclear Fuel Waste Management Program. Geological and petrographical indicators of relative age (e.g. cross-cutting relationships, sequences of fracture infilling minerals, P-T characteristics of primary and secondary minerals) are calibrated with radiometric age determinations on minerals and whole rock samples, using 87 Rb- 87 Sr, 40 K- 39 Ar, 40 Ar- 39 Ar and fission track methods. Most fractures and fracture zones inclined at low angles are found to be ancient features, first formed in the Early Proterozoic under conditions of deuteric alteration. Following some movement on fractures in the Late Proterozoic and Early Paleozoic, reactivation of fractures during the Pleistocene is established from uranium-series dating methods and use of stable isotopic contents of fracture infilling minerals (mainly calcite). Some indication of movement on fracture zones during the Pleistocene is given by electron spin resonance dating techniques on fault gouge. The slow rate of propagation of fractures is indicated by mineral infillings, their P-T characteristics and U-series calcite ages in a fracture in sparsely fractured rock, accessible from AECL's Underground Research Laboratory. These results collectively indicate that deep fractures observed in the batholith are ancient features and the fracturing and jointing in the upper 200 m is relatively recent (< 1 Ma) and largely a result of stress release. (author)

Sistemas de manejo do solo na recuperação de uma pastagem degradada em Rondônia

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Afrânio Ferreira Neves Junior

2013-02-01

Full Text Available Na região amazônica, pastagens formadas e conduzidas de forma inadequada perdem a produtividade durante os primeiros anos em razão de superpastejo, ausência de adubação e de manutenção e emprego de espécies inadequadas para as condições edafoflorísticas da região. O objetivo deste estudo foi quantificar as modificações ocasionadas por diferentes sistemas de manejo nos atributos físicos de um Latossolo Vermelho-Amarelo (LVA, sob pastagem degradada no Estado de Rondônia, RO. Os sistemas de manejo utilizados nos tratamentos foram: T = testemunha; G = gradagem + NPK + micronutrientes; H = herbicida + NK + micronutrientes; A = plantio direto de arroz + NPK + micronutrientes; e S = plantio direto de soja + NPK + micronutrientes. O delineamento experimental foi em blocos ao acaso com quatro repetições. Para avaliar os tratamentos, amostras com estrutura indeformada foram coletadas em três profundidades (0-0,10; 0,10-0,20 e 0,20-0,30 m para determinar a curva de retenção da água no solo, densidade do solo, resistência do solo à penetração de raízes, macroporosidade, microporosidade, porosidade total, estimativa do intervalo hídrico ótimo (IHO, densidade máxima do solo (Dsmax e densidade relativa do solo (Dsrel. Os sistemas de manejo do solo adotados na recuperação da pastagem não proporcionaram melhorias significativas nos atributos físicos do solo, 40 meses após a implantação dos tratamentos. Em todos os sistemas de manejo, foram encontrados valores de densidade do solo acima do considerado ideal (1,40 Mg m-3 e abaixo do crítico (1,75 Mg m-3. Todos os sistemas de manejo apresentaram valores de densidade do solo relativa (Dsrel acima do valor adotado como crítico (Dsrel = 86 %, exceto no sistema em que foi realizado o preparo do solo na profundidade de 0-0,10 m. A qualidade física do solo, avaliada pelo IHO, diminuiu com o aumento da profundidade do solo.

Conocimiento y manejo del dolor en alumnos de enfermería

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Ma. del Refugio Zavala-Rodríguez

2008-01-01

Conclusión: se requiere analizar, a través de trabajo colegiado, el contenido y la metodología en las asignaturas de enfermería que conlleva la formación profesional esencial que se exige a enfermería en medidas terapéuticas para el manejo del dolor del usuario de los servicios de salud, dentro de un marco de seguridad técnico, científico, ético y legal.

ATRESIA CONGÉNITA DEL OÍDO Y SU MANEJO

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Dr. Daniel Orfila

2016-11-01

Los implantes cocleares siguen siendo los más usados y en las que se tiene mayor experiencia. Las prótesis de conducción ósea implantables o semi implantables cambiaron el manejo de las atresias y malformaciones de oído externo y medio. Pese a lo prometedor que se visualiza el presente y futuro con el uso de estos dispositivos, siempre se debe tener presente que requieren de un acto quirúrgico para su implantación y que no están exentas de complicaciones, por lo cual se debe elegir juiciosamente la prótesis a usar.

MANEJO INTEGRAL DE HUERTOS DE MANGO 'ATAULFO' CON ALTAS DENSIDADES DE PLANTACIÓN

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V. Vázquez-Valdivia

2009-01-01

Full Text Available El objetivo de este estudio fue evaluar el efecto de tratamientos integrales de manejo en huertos con altas densidades de plantación sobre el vigor, crecimiento vegetativo, floración, producción, época de producción y peso del fruto de árboles de mango 'Ataulfo'. Se seleccionó un huerto de mango 'Ataulfo' bajo condiciones de riego con alta densidad de plantación y se aplicaron tratamientos de manejo integrado (MI diferentes que incluyen: poda, (ligera o moderada, riego (aplicación o suspensión, fertilización (en etapas fenológicas específicas aplicaciones de nitratos o urea desbiuretizada al follaje para promover brotación vegetativa o floración y Paclobutrazol al suelo. Los resultados mostraron que con los tres sistemas integrales de manejo se obtuvieron beneficios en diversos aspectos; ya que se controló el tamaño del árbol, se obtuvo una floración y una cosecha anticipada en alrededor de 30 días en comparación al testigo, lo que permitió alcanzar mejores precios al producir fuera de la época normal. El rendimiento de los tres paquetes fue superior en ambos años en comparación al testigo; el rendimiento acumulado de dos cosechas en el testigo fue de 75.65 kg·árbol-1, mientras que en los paquetes varió de 149.40 a 163.59 kg. El peso promedio de los frutos no fue afectado por los tratamientos evaluados. El paquete que se recomienda aplicar es el número uno ya que es el que tuvo mayor rendimiento acumulado y es el más económico de los tres.

Asma aguda em adultos na sala de emergência: o manejo clínico na primeira hora

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DALCIN PAULO DE TARSO ROTH

2000-01-01

Full Text Available Asma é doença com alta prevalência em nosso meio e ao redor do mundo. Embora novas opções terapêuticas tenham sido recentemente desenvolvidas, parece haver aumento mundial na sua morbidade e mortalidade. Em muitas instituições, as exacerbações asmáticas ainda constituem emergência médica muito comum. As evidências têm demonstrado que a primeira hora no manejo da asma aguda na sala de emergência concentra decisões cruciais que podem determinar o desfecho desta situação clínica. Nesta revisão não-sistemática, os autores enfocaram a primeira hora da avaliação e tratamento do paciente com asma aguda na sala de emergência, descrevendo uma estratégia apropriada para o seu manejo. São consideradas as seguintes etapas: diagnóstico, avaliação da gravidade, tratamento farmacológico, avaliação das complicações e decisão sobre onde se realizará o tratamento adicional. Espera-se que estas recomendações contribuam para que o médico clínico tome a decisão apropriada na primeira hora do manejo da asma aguda.

[Charles Gerhardt's life and work].

Science.gov (United States)

Blondel-Mégrelis, Marika

2008-05-01

Charles Gerhardt's life and work is rather well-known thanks to Grimaux and Tiffeneau. His reform of the equivalents, his classification, his obtention of organic acid anhydrids and his famous Treatise of Organic Chemistry. His active collaboration to the Revue scientifique et industrielle du Docteur Quesneville, the creation of his Comptes-Rendus des Travaux de Chimie. Are not so often quoted. Thanks to his translations and reviews, German chemical advancements became well known in France Gerhardt was Liebig's translator for almost all his life, even through the fluctuations of their personal relation. He was the representative of German chemistry in France. With Auguste Laurent, with whom he is constantly associated, things need to be examined precisely. Laurent and Gerhardt, friends at a moment, cannot be confounded. Though they worked together for some years, they were not engaged in a similar project. Besides an experimentalist, Laurent was essentially a theorician of chemistry, whereas Gerhardt refused to think about atoms and arrangements. Formulas have to describe relations between facts, in no case anything about arrangements. For posterity however, Gerhardt will be, on the same level as Laurent, the creator of modern chemistry doctrines.

Darwin's Other Bulldog: Charles Kingsley and the Popularisation of Evolution in Victorian England

Science.gov (United States)

Hale, Piers J.

2012-01-01

The nineteenth-century Anglican Priest Charles Kingsley (1819-1875) was a significant populariser of Darwin's theory of evolution by natural selection. Kingsley was successful in this regard because he developed such diverse connections throughout his career. In the 1840s he associated with Chartists and radical journalists; in the 1850s and 1860s…

Diagnóstico preliminar, base para la construcción de un programa de manejo de residuos sólidos en la universidad de san buenaventura, cartagena

OpenAIRE

RÍOS MONTES, KARINA ANDREA; ECHEVERRI JARAMILLOM, GUSTAVO EUGENIO

2012-01-01

Los residuos sólidos pueden generar impactos negativos al ambiente y al ser humano por causa de un manejo inadecuado. Las universidades deben contemplar su manejo en las etapas de generación, recolección y disposición final, e incluir su valoración. Se realizó un estudio descriptivo de corte transversal, cuyo objetivo fue realizar un diagnóstico preliminar sobre el manejo de residuos sólidos, incluyendo percepción, conocimiento y recomendaciones dadas por la comunidad universitaria, para cont...

Visionäärid ning disaini hälli kiigutajad Charles ja Ray Eames / Katrin Kask

Index Scriptorium Estoniae

Kask, Katrin

2007-01-01

Ameerika disainiklassikute Charles (1907-1978) ja Ray Eamesi (1912-1988) disainitud toolidest. Nende oma majast Californias, mis koosneb tehases valmistatud teras-, vineer- ja klaasdetailidest. Filmidest "Ülevaade Metropolitanist" ja "Powers of Ten"

General Charles F. Bolden, Jr. and Professor Claude Nicollier reunite during visit to CERN

CERN Multimedia

Jordan Juras

2011-01-01

Thursday 23 June, CERN saw an unlikely and much savoured meeting between two old colleagues and friends: General Charles F. Bolden, Jr. and Professor Claude Nicollier.   Bolden and Nicollier were separately invited to CERN for different reasons - Charles Bolden had been invited by Professor Samuel Ting to visit the newly built and now fully operational Payload Operation and Control Centre of the AMS collaboration and Claude Nicollier had been invited by the Theory Department to give a colloquium. They were delightfully surprised when they met at the entrance of the main building. Bolden and Nicollier served together in the Space Shuttle Program and were trained by NASA during the 1980’s where they became close friends. On 24 April, 1990, Bolden piloted the Space Shuttle Discovery into orbit with the Hubble telescope in the payload bay. Though Nicollier did not accompany Bolden during the Hubble launch, he did return to the telescope 3 years later on board the Space Shuttle Ende...

Ray & Charles Eames : aatomid, toolid ja universumi äär / Tõnu Kaalep

Index Scriptorium Estoniae

Kaalep, Tõnu, 1966-2018

1998-01-01

Californias elanud disainiklassikutest Ray (1912-1988) ja Charles (1907-1978) Eamesist. Kasutasid oma mööbliloomingus lisaks painutatud vineerile alumiiniumi, fiiberklaasi, plastmassi, terastraati. Uuendasid vormikäsitlust, tehnoloogiat. Nende mööbel oli moodsa ja seninägematu väljanägemisega, kerge, lihtsalt töödeldav. Tegelesid ka fotograafia ja filmiga. Näitus Eamesite loomingust on avatud Londoni Disainimuuseumis. Artikli juures illustratsioonid.

The Charles River, Eastern Massachusetts: Scientific Information in Support of Environmental Restoration

Science.gov (United States)

Weiskel, Peter K.

2007-01-01

Human activity has profoundly altered the Charles River and its watershed over the past 375 years. Restoration of environmental quality in the watershed has become a high priority for private- and public-sector organizations across the region. The U.S. Environmental Protection Agency and the Massachusetts Executive Office of Environmental Affairs worked together to coordinate the efforts of the various organizations. One result of this initiative has been a series of scientific studies that provide critical information concerning some of the major hydrologic and ecological concerns in the watershed. These studies have focused upon: * Streamflows - Limited aquifer storage, growing water demands, and the spread of impervious surfaces are some of the factors exacerbating low summer streamflows in headwater areas of the watershed. Coordinated management of withdrawals, wastewater returns, and stormwater runoff could substantially increase low streamflows in the summer. Innovative approaches to flood control, including preservation of upstream wetland storage capacity and construction of a specially designed dam at the river mouth, have greatly reduced flooding in the lower part of the watershed in recent decades. * Water quality - Since the mid-1990s, the bacterial quality of the Charles River has improved markedly, because discharges from combined sewer overflows and the number of illicit sewer connections to municipal storm drains have been reduced. Improved management of stormwater runoff will likely be required, however, for full attainment of State and Federal water-quality standards. Phosphorus inputs from a variety of sources remain an important water-quality problem. * Fish communities and habitat quality - The Charles River watershed supports a varied fish community of about 20 resident and migratory species. Habitat conditions for fish and other aquatic species have improved in many parts of the river system in recent years. However, serious challenges remain

Relación Entre las Estrategias de Manejo del Conflicto y la Percepción de la Violencia Situacional en la Pareja

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MARÍA DEL PILAR MÉNDEZ SÁNCHEZ

2015-01-01

Full Text Available Se buscó determinar si las estrategias de manejo del conflicto influyen en la violencia situacional en la pareja. A una muestra de 342 participantes se le aplicó la Escala de Estrategias de Manejo de Conflicto y la Escala de Violencia en la Pareja. Los resultados indicaron que los hombres muestran mayor afecto, tiempo y acomodación que las mujeres ante los conflictos de pareja; sin embargo, ellas perciben más violencia física y económica, así como mayor intimidación y humillación/devaluación. Un modelo estructural para el análisis de los datos mostró que la violencia fue predicha por las dimensiones de las estrategias de manejo del conflicto de evitación, tiempo, afecto, acomodación y reflexión/ comunicación.

Anton’s Syndrome due to Bilateral Ischemic Occipital Lobe Strokes

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Sanela Zukić

2014-01-01

Full Text Available We present a case of a patient with Anton’s syndrome (i.e., visual anosognosia with confabulations, who developed bilateral occipital lobe infarct. Bilateral occipital brain damage results in blindness, and patients start to confabulate to fill in the missing sensory input. In addition, the patient occasionally becomes agitated and talks to himself, which indicates that, besides Anton’s syndrome, he might have had Charles Bonnet syndrome, characterized by both visual loss and hallucinations. Anton syndrome, is not so frequent condition and is most commonly caused by ischemic stroke. In this particular case, the patient had successive bilateral occipital ischemia as a result of massive stenoses of head and neck arteries.

Peripheral facial palsy in the past: contributions from Avicenna, Nicolaus Friedreich and Charles Bell Paralisia facial periférica nos velhos tempos: as contribuições de Avicenna, Nicolaus Friedreich e Charles Bell

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Luiz Antonio de Lima Resende

2008-01-01

Full Text Available This study provides historical documents of peripheral facial palsy from Egypt, Greece and Rome, through the middle ages, and the renaissance, and into the last four centuries. We believe that the history of peripheral facial palsy parallels history of the human race itself. Emphasis is made on contributions by Avicenna and Nicolaus Friedreich. Controversies about the original clinical description by Charles Bell are also discussed.Este estudo apresenta documentos de paralisia facial periférica nas artes plásticas no Egito antigo, Grécia e Roma, Idade Média, Renascimento e também dos últimos 4 séculos. Pensamos que a história da paralisia facial periférica acompanha a história da própria espécie humana. São apresentadas as contribuições de Avicenna e Nicolaus Friedreich, e são mostradas controvérsias sobre a descrição original de Charles Bell.

An appreciation of Christiane Groehen: the correspondence between Charles Darwin and Anton Dohrn.

Science.gov (United States)

Browne, Janet

2015-01-01

Anton Dohrn was introduced to Darwinism by Ernst Haeckel during his student years at Jena, and became an eager disciple of Charles Darwin's work. He founded the Stazione Zoologica in 1872. Darwin became a patron of Dohrn's Stazione, and the two naturalists corresponded regularly. This article discusses their relationship and the contributions of Christiane Groeben to its elucidation.

New Workflows for Born-Digital Assets: Managing Charles E. Bracker's Orchid Photographs Collection

Science.gov (United States)

Hurford, Amanda A.; Runyon, Carolyn F.

2011-01-01

Charles E. Bracker was a professor of botany and plant pathology at Purdue University from 1964 to 1999. His late wife, Anri, was an orchid enthusiast who began collecting and housing orchids in the 1980s. In 2009, Bracker's 30,000 digital orchid photographs were donated to Ball State University Libraries, where both of this article's authors…

Manejo de plantas daninhas em maracujazeiro amarelo cultivado com adubação química e orgânica

OpenAIRE

Ogliari,J.; Freitas,S.P.; Carvalho,A.J.C.; Ferreira,L.R.; Marinho,C.S.; Thiebaut,J.T.L.

2007-01-01

Objetivou-se, neste trabalho, avaliar diferentes formas de manejo de plantas daninhas na cultura do maracujazeiro, cultivado com adubação química e orgânica. O delineamento experimental foi em blocos casualizados, com 15 tratamentos, arranjados em esquema de parcelas subdivididas, com quatro repetições e 10 plantas úteis por parcela. Os tratamentos foram constituídos por três tipos de adubações na parcela (orgânica, química e química + orgânica) e cinco manejos de plantas daninhas na subparce...

Isolamento de microssatélites de espécies madeireiras no contexto da sustentabilidade genética no manejo florestal

OpenAIRE

VINSON, Christina Cleo

2004-01-01

Aborda isolamento de microssatélites de espécies madeireiras no contexto da sustentabilidade genética no manejo florestal com o objetivo de isolar e caracterizar uma bateria de marcadores microssatélites para espécies arbóreas da Floresta Amazônica: Jacaranda copaia, Bagassa guianensis e Dipteryx odorata. Estes estudos vem sendo realizados como parte do projeto Dendrogene, e as análises genéticas populacionais posteriores fornecerão subsídios para conservação e manejo sustentável destas espéc...

Ground-water flow and ground- and surface-water interaction at the Weldon Spring quarry, St. Charles County, Missouri

International Nuclear Information System (INIS)

Imes, J.L.; Kleeschulte, M.J.

1997-01-01

Ground-water-level measurements to support remedial actions were made in 37 piezometers and 19 monitoring wells during a 19-month period to assess the potential for ground-water flow from an abandoned quarry to the nearby St. Charles County well field, which withdraws water from the base of the alluvial aquifer. From 1957 to 1966, low-level radioactive waste products from the Weldon Spring chemical plant were placed in the quarry a few hundred feet north of the Missouri River alluvial plain. Uranium-based contaminants subsequently were detected in alluvial ground water south of the quarry. During all but flood conditions, lateral ground-water flow in the bedrock from the quarry, as interpreted from water-table maps, generally is southwest toward Little Femme Osage Creek or south into the alluvial aquifer. After entering the alluvial aquifer, the ground water flows southeast to east toward a ground-water depression presumably produced by pumping at the St. Charles County well field. The depression position varies depending on the Missouri River stage and probably the number and location of active wells in the St. Charles County well field

Manejo de la primera alimentación del bocachico ( Prochilodus magdalenae.

Directory of Open Access Journals (Sweden)

Víctor Atencio-García

2003-06-01

Full Text Available En el Centro de Investigación Piscícola de la Universidad de Córdoba se realizaron dos experimentos; en elprimero, el objetivo fue evaluar el efecto de diferentes presas en el manejo de la primera alimentación delbocachico Prochilodus magdalenae y en el segundo, con la mejor presa del ensayo anterior, determinar eltiempo mínimo de manejo de la primera alimentación. En ambos casos las post-larvas fueron sembradas a 50/L en acuario de 5 L. En el primer experimento se evaluaron las siguientes presas: nauplios de Artemia (NA,cistos descapsulados de Artemia (CA, zooplancton silvestre tamizado entre 125-160 µm (Z125-160 y zooplanctonsilvestre tamizado entre 250-400 µm (Z250-400, ofrecidas durante cinco días a razón de 5 Presa/mL. Además,un grupo de post-larvas fue sometida a ayuno. Las mayores ganancias de peso y longitud total la registraron laspost-larvas alimentadas con NA (2.0±1.8 mg, 1.8±0.9 mm y Z250-400 (2.0±1.1 mg, 1.6±0.5 mm. Lasobrevivencia de las post-larvas alimentadas con NA (73.2±10.7% fue mayor a las registradas en los demástratamientos (P0.05. Mientras que latasa de crecimiento específico (G osciló entre 17.1 (5 días y 22.3 %/día (3 días, sin observarse diferenciasestadísticas significativas (P>0.05. Las post-larvas alimentadas durante 3, 5 y 7 días presentaron las mejoressobrevivencias (92.2±6.2, 93.3±4.3, 95.6±3.9% respectivamente cuando fueron sometidas a la prueba deresistencia al estrés. Las post-larvas alimentadas por un solo día mostraron la menor sobrevivencia al sersometidas a esta prueba (87±1%. Los resultados del estudio sugieren que nauplios de Artemia o zooplanctonsilvestre en le rango de 250-400 mm, libre de predadores, son presas adecuada para el manejo de la primeraalimentación al menos durante 3 días antes de ser sembradas en estanques en tierra.

Charles Silberman's "Crisis in the Classroom, The Remaking of American Education": A Critical Analysis

Science.gov (United States)

Costley, Kevin C.

2009-01-01

In 1970, journalist and scholar Charles Silberman published "Crisis in the Classroom; the Remaking of American Education." His intended audiences was teachers and students, school board members and taxpayers, public officials and civic leaders, newspaper and magazine editors and readers, television directors and viewers, parents and children.…

Design and Management of Irrigation Systems Diseño y Manejo de Sistemas de Riego

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Eduardo A Holzapfel

2009-12-01

Full Text Available Irrigation systems should be a relevant agent to give solutions to the increasing demand of food, and to the development, sustainability and productivity of the agricultural sector. The design, managing, and operation of irrigation systems are crucial factors to achieve an efficient use of the water resources and the success in the production of crops and orchards. The aim of this paper is to analyze knowledge and investigations that enable to identify the principal criteria and processes that allow improving the design and managing of the irrigation systems, based on the basic concept that they facilitate to develop agriculture more efficient and sustainable. The design and managing of irrigation systems must have its base in criteria that are relevant, which implies to take into account agronomic, soil, hydraulic, economic, energetic, and environmental factors. The optimal design and managing of irrigation systems at farm level is a factor of the first importance for a rational use of water, economic development of the agriculture and its environmental sustainability.Los sistemas de riego deberían ser un agente relevante para dar soluciones a la demanda creciente de alimentos, y el desarrollo, sustentabilidad y productividad del sector agrícola. El diseño, manejo, y operación de los sistemas de riego son factores cruciales para lograr un uso eficiente de los recursos hídricos y el éxito en la producción de cultivos y frutales. El objetivo de este artículo fue analizar conocimientos e investigaciones que permitan identificar los principales criterios y procesos para mejorar el diseño y manejo de los sistemas de riego, basados en el concepto básico de desarrollar una agricultura más eficiente y sostenible. El diseño y manejo de los sistemas de riego deben tener su base en criterios que sean relevantes, lo que implica considerar aspectos agronómicos, de suelo, hidráulicos, económicos, energéticos, y ambientales. El diseño y

Manejo de desechos en universidades. Estudio de caso: Instituto Tecnológico de Costa Rica

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Luis Guillermo Romero Esquivel

2008-04-01

Full Text Available Actualmente, las universidades desempeñan un papel preponderante en el manejo integral de los desechos sólidos que tanto estas como la sociedad generan, en tanto que se encargan de educar a la mayor parte de los futuros individuos involucrados en la toma de decisiones.Este artículo describe un caso de estudio acerca del manejo de desechos que realiza el Instituto Tecnológico de Costa Rica (ITCR mediante la actividad permanente “Manejo de Desechos Institucionales” (MADI, específicamente, en el manejo de desechos sólidos ordinarios. El principal objetivo del programa MADI ha sido la minimización, reutilización, reciclaje y el destino final responsable de los desechos y la creación de una conciencia ambiental en estudiantes, funcionarios y comunidades aledañas. El programa MADI cuenta conun centro de acopio y varias baterías (sistema de recipientes para la recolección y recuperación de estos desechos. Existe una persona encargada de mantener el contacto y realizar la venta con empresas que reciclan directamente estos materiales o con intermediarios. La cantidad de materiales (plástico, vidrio y aluminio que se ha recuperado anualmente se ha mantenido prácticamente constante para el período 2000-2007, con excepción del papel cuya venta se duplicó, a partir del año 2004. De este material, en elperíodo mencionado, se han recuperado, aproximadamente 196 toneladas (90% del peso total, seguido por el vidrio con 21 toneladas (9,6%, el plástico 3,6 toneladas (1,6% y, por último, 1 tonelada de aluminio (0,4%. Recientemente, se inició la recolecta de una cantidad hasta ahora indeterminada de cartuchos de tinta de computadora y tonners de fax. Para la implementación exitosa de este tipo de actividad se deben de considerar tres aspectos fundamentales: la educación de la población, una infraestructura adecuada y la comunicación constante con las empresas que reciclan los desechos.

Bipedal locomotion of bonnet macaques after spinal cord injury.

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Babu, Rangasamy Suresh; Anand, P; Jeraud, Mathew; Periasamy, P; Namasivayam, A

2007-10-01

Experimental studies concerning the analysis of locomotor behavior in spinal cord injury research are widely performed in rodent models. The purpose of this study was to quantitatively evaluate the degree of functional recovery in reflex components and bipedal locomotor behavior of bonnet macaques (Macaca radiata) after spinal contusive injury. Six monkeys were tested for various reflex components (grasping, righting, hopping, extension withdrawal) and were trained preoperatively to walk in bipedal fashion on the simple and complex locomotor runways (narrow beam, grid, inclined plane, treadmill) of this investigation. The overall performance of the animals'motor behavior and the functional status of limb movements during bipedal locomotion were graded by the Combined Behavioral Score (CBS) system. Using the simple Allen weight-drop technique, a contusive injury was produced by dropping a 13-g weight from a height of 30 cm to the exposed spinal cord at the T12-L1 vertebral level of the trained monkeys. All the monkeys showed significant impairments in every reflex activity and in walking behavior during the early part of the postoperative period. In subsequent periods, the animals displayed mild alterations in certain reflex responses, such as grasping, extension withdrawal, and placing reflexes, which persisted through a 1-year follow-up. The contused animals traversed locomotor runways--narrow beam, incline plane, and grid runways--with more steps and few errors, as evaluated with the CBS system. Eventually, the behavioral performance of all spinal-contused monkeys recovered to near-preoperative level by the fifth postoperative month. The findings of this study reveal the recovery time course of various reflex components and bipedal locomotor behavior of spinal-contused macaques on runways for a postoperative period of up to 1 year. Our spinal cord research in primates is advantageous in understanding the characteristics of hind limb functions only, which possibly

Early-life stress and the development of obesity and insulin resistance in juvenile bonnet macaques.

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Kaufman, Daniel; Banerji, Mary Ann; Shorman, Igor; Smith, Eric L P; Coplan, Jeremy D; Rosenblum, Leonard A; Kral, John G

2007-05-01

Stress is a risk factor for chronic illnesses such as obesity, type 2 diabetes, and hypertension and has been postulated to cause the metabolic syndrome via perturbation of the hypothalamo-pituitary-adrenal (HPA) axis. In our model of early-life stress (variable foraging demand [VFD]), food insecurity is imposed on monkey mothers for 16 weeks beginning when their nursing offspring are 3-5 months of age. Under VFD, food availability is never restricted, and the infant's growth is unaffected. VFD rearing does, however, cause a range of neurobiological abnormalities, including dysregulation of the HPA axis, manifested in abnormal cerebrospinal fluid cortisol and corticotropin-releasing factor levels. We previously reported spontaneous occurrence of metabolic syndrome in 14% of normally reared peripubertal bonnet macaques given ad libitum access to standard monkey chow. Here, we show that compared with normally reared monkeys, peripubertal VFD juveniles exhibit greater weight, BMI, abdominal circumference, and glucagon-like peptide-1 and decreased glucose disposal rates during hyperinsulinemic-euglycemic clamps. Our data suggest that early-life stress during a critical period of neuro development can result in the peripubertal emergence of obesity and insulin resistance.

Manejo quirúrgico de la orbitopatía de graves

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Rodrigo Poblete, S.

2010-01-01

La Enfermedad de Graves corresponde a un síndrome que comprende: bocio hipertiroídeo habitualmente, oftalmopatía asociada a la tiroides y dermatopatía. No se cuenta con estadísticas nacionales, sin embargo la mayoría de los estudios internacionales muestran una frecuencia mayor en la mujer. Desde el punto de vista del manejo quirúrgico de esta enfermedad, éste se basa en tres etapas fundamentales: descompresión orbitaria, cirugía de los músculos extraoculares y finalmente la cirugía de reposi...

Primary secretory otitis media in Cavalier King Charles spaniels.

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Cole, Lynette K

2012-11-01

Primary secretory otitis media (PSOM) is a disease that has been described in the Cavalier King Charles spaniel (CKCS). A large, bulging pars flaccida identified on otoscopic examination confirms the diagnosis. However, in many CKCS with PSOM the pars flaccida is flat, and radiographic imaging is needed to confirm the diagnosis. Current treatment for PSOM includes performing a myringotomy into the caudal-ventral quadrant of the pars tensa with subsequent flushing of the mucus out of the bulla using a video otoscope. Repeat myringotomies and flushing of the middle ear are necessary to keep the middle ear free of mucus. Copyright © 2012 Elsevier Inc. All rights reserved.

Factores de riesgo sociales y ambientales relacionados con casos de leptospirosis de manejo ambulatorio y hospitalario, Turbo, Colombia

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Dionisia Yusti

2013-08-01

Full Text Available Introducción. La leptospirosis es un problema de salud pública en el Urabá colombiano y poco se sabe sobre las condiciones ambientales y sociales de esta enfermedad en la región. Objetivo. Explorar algunos factores de riesgo relacionados con leptospirosis de manejo hospitalario y ambulatorio, en pacientes del municipio de Turbo durante los años 2010 y 2011. Materiales y métodos. Mediante un estudio descriptivo se exploraron factores relacionados conla exposición a Leptospira spp. (aspectos socio-demográficos, hábitos, condiciones físicas y de saneamiento de la vivienda, hacinamiento, fuentes de agua potable, presencia de roedores sinantrópicos y convivencia con animales en pacientes con leptospirosis que requirieron manejo hospitalario en el municipio de Turbo durante los años 2010 y 2011. Se utilizaron medidas estadísticas estandarizadas para estudios descriptivos. Resultados. Se encontró que el hábito de caminar descalzo en ambientes domésticos representó 4,27 (1,32-13,82 veces el riesgo para presentar leptospirosis de manejo hospitalario (p=0,012. El análisis multivariado exploratorio mostró que la presencia de fauna silvestre en las viviendas puede estar relacionada también con casos de manejo hospitalario. Este hallazgo representó 4,22 (1,13-15,72 veces el riesgo comparado con los casos ambulatorios que manifestaron no tener este tipo deanimales dentro de la vivienda (p=0,032. Conclusión. Este estudio plantea bases para diseñar e implementar intervenciones efectivas, orientadas desde el perfil de riesgos al que se exponen sus habitantes, en un área geográfica queexhibe una epidemiología dinámica de contexto complejo para leptospirosis.   doi: http://dx.doi.org/10.7705/biomedica.v33i0.1457

Zonas de manejo em função de propriedades de solo, relevo e produtividade da lavoura cafeeira

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Bruno Manoel Rezende de Melo

2017-07-01

Full Text Available O objetivo foi determinar zonas de manejo correlacionando produtividade, altitude, parâmetros de textura e fertilidade de solo em propriedades cafeeiras do sul de Minas Gerais. O experimento foi realizado em Inconfidentes (MG, em uma lavoura de café da cultivar Rubi com 0,849 ha-1, no espaçamento 2,2 m x 1,3m, em dezembro de 2011, em Latossolo Vermelho Amarelo distrófico. O local está situado a 957 metros de altitude com parte da lavoura situada no topo de morro e a outra parte em meia encosta, apresentando declividade máxima entre os pontos de maior e menor altitude de 37 %. O local para a coleta de solo está situado em cada ponto georreferenciado com um receptor GPS, para a zona 23k no sistema de referências SIRGAS 2000. Posteriormente foram analisados os parâmetros químicos, físicos, altitude e declividade da área. Para verificar a dependência espacial dos fatores em estudo, utilizou-se da geoestatística. Na presença de dependência espacial foram confeccionados os mapas de gradiente. Os resultados demonstram que não foi possível encontrar dependência espacial para o fósforo. Para as variáveis matéria orgânica, potássio, saturação de bases, pH e declividade, foi possível identificar zonas de manejo em função da correlação significativa com a altitude. A produtividade nos dois anos apresentou variabilidade espacial e temporal. Conclui-se, desta forma, que zonas de manejo podem ser identificadas correlacionando altitude com parâmetros de fertilidade. Para a produtividade e textura nos dois anos de estudos, não foram observadas zonas de manejo.

Efecto del Programa de Entrenamiento “Manejo del Dolor” en la Documentación de Enfermería en el Expediente Electrónico

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Monsiváis, María Guadalupe Moreno; Guzmán, Ma. Guadalupe Interial; Flores, Paz Francisco Sauceda; Arreola, Leticia Vázquez

2012-01-01

Resumen En el presente trabajo se muestra la importancia de entrenar al personal de enfermería para mejorar la documentación en el expediente electrónico. Se eligió el manejo del dolor por ser un área prioritaria; una alta proporción de pacientes en período post operatorio cursa con dolor, por lo tanto, la documentación debe ser útil para la toma de decisiones clínicas. Se implementó un programa de entrenamiento denominado “Manejo del Dolor” dirigido al personal de enfermería. Se utilizó la tecnología de la información como herramienta para fortalecer el conocimiento con base en la revisión sistemática de la literatura; el personal de enfermería participante seleccionó la mejor evidencia; posteriormente se trabajó en la transferencia de este conocimiento a la práctica a través del diseño de un protocolo para el manejo del dolor. Se concluye que el conocimiento del manejo del dolor es fundamental para que enfermería documente con mayor precisión sus intervenciones. PMID:24199106

Physician/chemist/geologist: Charles Thomas Jackson's life of conflict and controversy

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Landa, E.R.

1995-01-01

After a brief medical career, Charles Thomas Jackson (1805-1880) began work as a consulting chemist and geologist in Boston. He serves as State Geologist in Maine, Rhode Island, and New Hampshire from 1837 to 1884, and completed geological surveys of those States. In 1847, he was appointed United States Geologist to undertake a survey of the public lands of the Lake Superior region of Michigan. This survey was beset by strife, and Jackson was forced to resign in 1849. -from Author

Costos económicos en la producción de servicios de salud: del costo de los insumos al costo de manejo de caso

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ARREDONDO ARMANDO

1997-01-01

Full Text Available Objetivo. Generar información sobre los costos de producción de servicios de salud. Material y métodos. Siguiendo los criterios de Kessner se seleccionaron como trazadores: hipertensión, diabetes, diarreas y neumonías. Posteriormente, se definió el manejo de casos y, por medio de la metodología de costeo por manejo de caso, se definieron las funciones de producción, así como los insumos y costos unitarios requeridos para satisfacer la demanda de servicios médicos de cada enfermedad. Se procesaron los datos en una hoja de cálculo para identificar los costos de manejo de casos hospitalarios y ambulatorios. Resultados. Los hallazgos indican que a partir del costo de manejo de casos hospitalarios y ambulatorios para cada enfermedad de estudio es posible identificar el peso relativo, tanto de las distintas funciones de producción, como de los diferentes tipos de insumos. Dependiendo de las frecuencias relativas, tanto insumos como funciones de producción se clasificaron en alto, medio y bajo impacto sobre el costo total de manejo de caso. Conclusiones. A partir de la información generada se sugiere replantear los procesos de planeación, organización y asignación de recursos, en función de demandas de servicios hospitalarios y ambulatorios para cada trazador. Asimismo, se sugieren acciones para propiciar ganancias económicas en la utilización de recursos y en el uso más eficiente de los mismos.

The Scientific Instruments of Charles Wheatstone and the Blending of Science, Art, and Culture

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Metz, Don

2015-01-01

Charles Wheatstone was a British scientist who is most often remembered for his association with the Wheatstone bridge for measuring electrical resistance. A painfully shy man in public, Wheatstone, in reality, possessed a vibrant personality and a wide array of personal interests from acoustics to electricity to optics and parlour tricks. In this…

Interview with Dr. Charles Nolan: Dean of Admissions, Franklin W. Olin College of Engineering

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Helms, Robin Matross

2003-01-01

This article presents an interview with Dr. Charles Nolan, the former Dean of Admission at the Franklin W. Olin College of Engineering, in Needham, Massachusetts. Chartered in 1997, Olin College has taken a new approach to undergraduate engineering education by providing its students with both a solid engineering background and knowledge in the…

Atributos físicos de um planossolo háplico sob sistemas de manejo comparados aos do campo nativo

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Lima,Cláudia Liane Rodrigues de; Pillon,Clenio Naito; Suzuki,Luis Eduardo Akiyoshi Sanches; Cruz,Lucia Elena Coelho da

2008-01-01

Sistemas de manejo podem influenciar as condições físico-hídricas do solo e a produtividade das culturas. O objetivo deste estudo foi avaliar os atributos físicos de um Planossolo Háplico sob diferentes sistemas de manejo e compará-los com os encontrados no campo nativo. A densidade, a condutividade hidráulica de solo saturado, a porosidade e a agregação foram avaliadas nas camadas de 0,000-0,025; 0,025-0,075; 0,075-0,125; 0,125-0,175; 0,175-0,275 m. O sistema plantio direto e o preparo conve...

Producción de café (Coffea arabica L. en respuesta al manejo específico de la fertilidad del suelo

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Luz Adriana Lince Salazar

2015-12-01

Full Text Available El estudio de la variabilidad espacial es el principal insumo para el manejo específico por sitio-MES, con fines de optimizar los recursos, al reducir los costos de producción de los cultivos y el impacto negativo sobre el ambiente. Con el objetivo de determinar el efecto del MES en la producción del café, durante los años 2011 y 2012 se realizó un experimento del manejo de la fertilidad del suelo en café (Coffea arabica L., Variedad Castillo® en lotes con áreas diferentes (1,0, 2,0 y 3,5 ha, ubicados en tres fincas del departamento del Quindío, Colombia. Se evaluó el efecto de tres tratamientos en la producción de café cereza: i testigo sin fertilización; ii manejo de acuerdo a los resultados de los análisis de suelo, logrados mediante un muestreo convencional en zigzag y, iii manejo por sitio específico conforme lo indicaron las áreas homogéneas, obtenidas mediante mapas de variabilidad espacial. En ninguno de los lotes hubo efecto de los tratamientos, respuesta que se relacionó con uno o más de los siguientes factores: tiempo relativamente corto de evaluación, fertilidad del suelo, reservas de los nutrientes en las plantas, y el número reducido de repeticiones (tres por tratamiento.

EL MANEJO COSTERO INTEGRADO COMO PROBLEMA DE INVESTIGACIÓN TRANSDISCIPLINARIO EN LA UNIVERSIDAD PENÍNSULA DE SANTA ELENA.

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Vladimir Soria

2016-04-01

Full Text Available La investigación generativa es uno de los dominios sobre los cuales las universidades deben mostrar fortalezas para justificar su pertinencia y permanencia en el sistema ecuatoriano de educación superior. En enfoque transdisciplinario o de orquestación de ciencias se ha mostrado como el más apreciado dentro de la actual modelo de universidad, y una propuesta válida para responder a dicha exigencia es el estudio del manejo costero integrado como eje transversal dentro de la Universidad Estatal Península de Santa Elena. A través de la literatura científica se ha estudiado el manejo costero integrado como una forma de gobernanza ambiental cuyo origen se encuentra en los documentos generados en la Cumbre de la Tierra de Río de Janeiro en el año 1992. Dentro de la provincia de Santa Elena el Manejo Costero Integrado busca incidir en dos aspectos: fortalecimiento institucional y participación ciudadana. El deficiente control ambiental en la faja costera existente exige un modelo de gestión a escala local basado en tres ejes: el fortalecimiento de las capacidades institucionales de las instituciones públicas desconcentradas; el ordenamiento territorial para una adecuada determinación y delimitación de las competencias en materia ambiental costera; y la participación ciudadana a nivel del régimen de las comunas en coordinación con los distintos niveles de gobierno. Se propone articular la investigación en la materia tanto a nivel interdisciplinario como interinstitucional, coordinando agendas de investigación de las instituciones públicas y privadas con las estrategias de los distintos actores políticos involucrados en el desarrollo sustentable de las zonas costeras. Finalmente se presentan los resultados preliminares de una investigación que se ha iniciado en la Facultad de Ciencias Administrativas sobre las características específicas de cada comuna ubicada en la faja costera para posteriormente proponer para cada una de ellas

Simulação do manejo do nitrogênio em arroz de terras altas com o modelo ORYZA/APSIM 2000

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Stone, Luís F.; Heinemann, Alexandre B.

2012-01-01

É importante definir a estratégia de manejo da adubação nitrogenada para o arroz de terras altas, pois o nitrogênio é o nutriente mais absorvido pelas plantas dessa cultura e, devido à facilidade de lixiviação no solo, pode poluir o meio ambiente. Objetivou-se, com este trabalho simular, com o modelo ORYZA/APSIM 2000, diferentes estratégias de manejo da adubação nitrogenada visando maximizar a produtividade e minimizar a lixiviação de N. Na simulação foi considerada a aplicação da dose de 100...

Charles Wagley: mentor and colleague

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Maxine L. Margolis

Full Text Available Professor Charles Wagley was my mentor at Columbia University, my colleague at the University of Florida and a dear friend. His influence on me can be summarized in one word: Brazil. From the time I took his course, "Peoples of Brazil", as a first semester graduate student at Columbia I was captivated and most of my subsequent field research and publications have had Brazilian themes. Under Dr. Wagley's direction I did field research for my dissertation in the coffee region of northern Paraná and focused on the shift from coffee cultivation to cattle ranching and the social and economic consequences of that change. My subsequent research in the area involved the impact of frost on this shift in economic base as well as one of its results: the flight of poor Brazilians to Paraguay. Then starting in the late 1980s my research shifted and I began focusing on Brazilian immigrants in New York City. This was part of a growing movement of Brazilians arriving in New York, elsewhere in the United States and in Europe and Japan. Since then most of my subsequent research and publications have been on this new wave of international migrants

Gestión y manejo de los residuos sólidos hospitalarios en el Centro de Salud Carlos Showing Ferrari, 2015

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Mendoza Herrera, Francisca

2016-01-01

Objetivo. Determinar la relación entre la gestión y el manejo de los residuos sólidos hospitalarios en el Centro de Salud “Carlos Showing Ferrari” durante el año 2015. Metodología. Fue un estudio de tipo transversal, analítico, prospectivo y observacional, con diseño correlacional. La población lo conformaron los servicios asistenciales del Centro de Salud Carlos Showing. Se aplicó una ficha de observación de la gestión y manejo de residuos sólidos hospitalarios. El an...

Oportunidades y perspectivas para PROSISA industria de cintas plásticas al aplicar el material flow management (manejo de flujos materiales)

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Borja Cánnepa, Johanna

2007-01-01

En la presente tesis los propósitos principales son la adecuada conceptualización y presentación del manejo de flujos materiales; nueva tendencia que ha generado expectativas en el exterior principalmente en industrias europeas y de Norte América. Además se busca dentro del presente trabajo analizar las connotaciones y oportunidades de la aplicación del manejo de flujos materiales en una empresa especifica de nuestro país, “PROSISA” Productos sintéticos S.A., considerando también las in...

Artrópodos asociados a Jatropha curcas Linnaeus. Funciones y estrategia para su manejo

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O Alonso

Full Text Available En la actualidad, Jatropha curcas Linnaeus constituye una de las plantas más investigadas a nivel mundial debido a su potencial como productora de aceite, el cual se puede transformar en biodiesel. Sin embargo, aún no se dispone de suficiente información sobre sus interacciones ecológicas con otros vegetales y animales; por lo que el conocimiento referente a los artrópodos asociados al piñón nombre común por el que se le conoce» es un requisito indispensable para el manejo adecuado del cultivo. El objetivo de este artículo es exponer los resultados de una recopilación realizada acerca de dichos organismos (insectos, ácaros y arañas, fundamentalmente, para lograr una mejor explotación de las plantaciones de este cultivo energético en Cuba. Dentro del grupo de los fitófagos se encontraron 151 especies de insectos, entre las que sobresalen las del orden Hemiptera, por ejemplo: Pachycoris klugii Burmeister (Scutelleridae y Leptoglossus zonatus (Dallas; además de cuatro de ácaros. Entre los benéficos se hallaron 90 especies de insectos, cinco de ácaros y 13 de arañas depredadoras. En cuanto a las estrategias de manejo de plagas, se hace un mayor énfasis en las medidas de control químico y en algunas acciones de tipo cultural. Teniendo en cuenta estos antecedentes, en Cuba es imprescindible conocer los principales organismos asociados a dicha planta, con vistas a incorporar con mayor precisión el componente agroecológico en el manejo de las plagas, y con ello contribuir al mantenimiento de las capacidades productivas de los agroecosistemas y a su resiliencia.

Manejo agronómico de los Vertisoles en México: una revisión

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Carlos Alberto Torres Guerrero

2016-10-01

Full Text Available Los Vertisoles ocupan el 8.3% del territorio nacional y se consideran los suelos más productivos del país. A pesar de ello, las investigaciones sobre su manejo agronómico han sido llevadas a cabo sólo en algunas localidades del país o en campos experimentales que impide la transferencia de tecnología. Varios esfuerzos se han realizado por generar información en este tipo de suelos desde 1985, sobre todo en el Altiplano Mexicano y en la zona costera del Golfo de México donde son dominantes y presentan serios problemas de degradación; sin embargo, también son comunes en otras regiones de México en las cuales se cuenta con escasa información. El objetivo de esta investigación fue realizar una revisión bibliográfica acerca del manejo agronómico de Vertisoles en México y las modificaciones que sufren sus propiedades físicas y químicas. El análisis de la información indica que los Vertisoles presentan problemas de manejo en cuatro aspectos principales: a mecanización; b compactación, c drenaje y d fertilización. No obstante su complejidad, las caracterizaciones de sus propiedades edáficas se han realizado sólo con algunas determinaciones físicas o químicas. El entendimiento de los procesos de formación puede ayudar a generar prácticas agronómicas adecuadas para cada zona agroclimática y disminuir los problemas de degradación física (compactación y química (declinación de la fertilidad que se están presentando en nuestro país.

Aspectos generales sobre evaluación y manejo del paciente con conducta suicida

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Ricardo Sánches Pedraza

2001-04-01

Full Text Available La valoración de las ideas y conductas suicidas y su manejo son temas de gran importancia para todos los clínicos, especialmente aquellos que trabajan en atención primaria y de urgencias. De acuerdo con diversos estudios epidemiológicos muchas de las personas que se suicidan han solicitado consulta médica en el mes anterior a su muerte. Pocos pacientes expresan espontáneamente su ideación o intención suicida a sus médicos, así que los clínicos deben estar alerta ante diversas señales que le pueden indicar que el paciente se encuentra en riesgo suicida. La intervención oportuna por parte del médico general es de gran valor para disminuir las tasas de mortalidad derivadas de las conductas suicidas. El presente artículo pretende describir las características epidemiológicas y clínicas de los pacientes que presentan conductas suicidas y suministrar al clínico una guía de evaluación y manejo de dichos pacientes.

Plan de manejo integral del sitio arqueológico Santa Elena, Tabasco, México

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Ernesto González Licón

2013-11-01

Full Text Available En este artículo se destaca la importancia histórica, cultural y turística del sitio arqueológico de Santa Elena, en el Estado de Tabasco, México. Mediante la ejecución de un proyecto de investigación arqueológica y Plan de Manejo Integral se pretende desarrollar todos estos aspectos para la recuperación del sitio y su entorno ecológico. Con la participación de los más amplios y diversos sectores públicos y privados interesados de los tres niveles de gobierno –federal, estatal y municipal–, se plantea el diseño de un Plan de manejo local y regional que permita el desarrollo sustentable de la zona y de su entorno para que sea abierta al público en general. Lo anterior será una fuente de información y conocimiento histórico, cultural, identitario y ecoturístico, que coadyuvará en el desarrollo integral de las comunidades actuales vecinas y cercanas.

Plan de manejo integral del sitio arqueológico Santa Elena, Tabasco, México

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Ernesto González Licón

2013-12-01

Full Text Available En este artículo se destaca la importancia histórica, cultural y turística del sitio arqueológico de Santa Elena, en el Estado de Tabasco, México. Mediante la ejecución de un proyecto de investigación arqueológica y Plan de Manejo Integral se pretende desarrollar todos estos aspectos para la recuperación del sitio y su entorno ecológico. Con la participación de los más amplios y diversos sectores públicos y privados interesados de los tres niveles de gobierno –federal, estatal y municipal–, se plantea el diseño de un Plan de manejo local y regional que permita el desarrollo sustentable de la zona y de su entorno para que sea abierta al público en general. Lo anterior será una fuente de información y conocimiento histórico, cultural, identitario y ecoturístico, que coadyuvará en el desarrollo integral de las comunidades actuales vecinas y cercanas.

Multifuncionalidade relações não-marcantis: manejo de recursos comuns no Nordeste

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Eric Sabourin

Full Text Available O artigo analisa alternativas de reconhecimento e valorização do caráter multifuncional da agricultura no Nordeste semiárido. Examina as funções associadas à produção agropecuária em termos de manejo de recursos naturais comuns e de produção de bens públicos, definidas como práticas não-mercantis de manejo de recursos naturais comuns, mobilizadas pelos agricultores por meio de diversas formas de ação coletiva fundadas em relações de reciprocidade. Defende a ideia de que tais dispositivos coletivos asseguram a sustentabilidade das funções produtivas, ambientais e sociais, a permanência ou a modernização das estruturas sociais e das instituições que regulam essas práticas de reciprocidade. O apoio a essas práticas e seu reconhecimento institucional ou jurídico contribuem para sua reprodução ou sua adaptação ao contexto atual.

Manejo florestal: questões econômico-financeiras e ambientais

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Irene Garrido Filha

2002-08-01

Full Text Available O MANEJO da floresta Amazônica está previsto no Código Florestal de 1965, mas somente em 1994 foi exigida a exploração sob forma sustentável, o que não é cumprida por falta de controle do IBAMA, por não dispor de pessoal suficiente. Todavia, os principais obstáculos ao manejo florestal são os altos custos de sua implantação, em relação aos lucros da maior parte dos madeireiros, e, principalmente, a falta de pesquisas científicas básicas e aplicadas que garantam a regeneração das espécies extraídas pelo corte seletivo. As políticas públicas não têm priorizado os estudos científicos, que dariam base à exploração dos imensos recursos da Amazônia.THE MANAGEMENT of the Amazon forest was foreseen in the 1965 Forest Code, but sustainable management was only required in 1994. This, however, was not enforced due to the lack of control by IBAMA (the federal agency in charge of the matter, which lacks personnel. Furthermore, the main obstacles to forest management are the high costs of its implementation, vis-à-vis the profits obtained by most lumber exploiters, and especially the lack of basic and applied research to assure the regeneration of tree species removed by selective cutting. Public policies have not prioritized scientific studies aimed at supporting the proper exploitation of the Amazon's immense resources.

Catherine the Great in the writings of Charles-Joseph Lamoral, 7th Prince de Ligne

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Joanna Pychowska

2012-01-01

Full Text Available Charles-Joseph de Ligne (1735-1814, a Wallon and European Prince, subject of the Austro-Hungary Empire, a heartbreaker of the French Europe, is considered the most famous representative of literary cosmopolitanism. War, love and writing were inseparable in his life. He took part in numerous military campaigns, serving both Austria and Russia, as a Russian colonel, a commander of the order of Maria Theresa, and an Austrian fi eld marshal. He authored various texts related to war; he admired heroism of Charles II, Conde, the tactics of Frederick II, the strategies of Napoleon, Catherine II. The latter was immportalized in de Ligne’s various texts representing different literary genres. The Prince was clearly fascinated by the Empress, and he depicted her in a positive light as an educated person, both agreable and determined. Can we, however, talk about the documentary character of his work ? Instead, the Prince seems to be a documentalist-interpreter.

Age-related environmental gradients influence invertebrate distribution in the Prince Charles Mountains, East Antarctica.

Science.gov (United States)

Czechowski, Paul; White, Duanne; Clarke, Laurence; McKay, Alan; Cooper, Alan; Stevens, Mark I

2016-12-01

The potential impact of environmental change on terrestrial Antarctic ecosystems can be explored by inspecting biodiversity patterns across large-scale gradients. Unfortunately, morphology-based surveys of Antarctic invertebrates are time-consuming and limited by the cryptic nature of many taxa. We used biodiversity information derived from high-throughput sequencing (HTS) to elucidate the relationship between soil properties and invertebrate biodiversity in the Prince Charles Mountains, East Antarctica. Across 136 analysed soil samples collected from Mount Menzies, Mawson Escarpment and Lake Terrasovoje, we found invertebrate distribution in the Prince Charles Mountains significantly influenced by soil salinity and/or sulfur content. Phyla Tardigrada and Arachnida occurred predominantly in low-salinity substrates with abundant nutrients, whereas Bdelloidea (Rotifera) and Chromadorea (Nematoda) were more common in highly saline substrates. A significant correlation between invertebrate occurrence, soil salinity and time since deglaciation indicates that terrain age indirectly influences Antarctic terrestrial biodiversity, with more recently deglaciated areas supporting greater diversity. Our study demonstrates the value of HTS metabarcoding to investigate environmental constraints on inconspicuous soil biodiversity across large spatial scales.

Le Flaubert de Charles Du Bos

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Jacques Neefs

2009-01-01

Full Text Available Charles Du Bos a porté une attention constante à l’œuvre de Flaubert (à l’exclusion de Bouvard et Pécuchet qui semble ne pas exister pour lui, à Madame Bovary et à L’Éducation sentimentale en particulier. La mise en relation de son étude : « Sur le milieu intérieur chez Flaubert », écrite en 1921, avec des textes du Journal de 1923 et de 1937, les rapprochements avec Gogol, Thomas Hardy, Tolstoï, Baudelaire, Henry James qui traversent les écrits de Du Bos, permettent de suivre ce que celui-ci décrit comme « l’expérience spirituelle » d’une matérialité comprise dans la conquête de la triple exigence du Beau, du Vivant et du Vrai. Du Bos décèle la force de l’œuvre de Flaubert dans la « disproportion » du style, et dans la puissance d’absorption qui fait la densité de cette prose, et qui désigne un extraordinaire travail de conversion. L’obscure expérience spirituelle ainsi poursuivie est celle d’un absolu de l’art, expérience paradoxale d’un « mystique qui ne croit à rien » (comme se désignait Flaubert lui-même, que le critique lie à une interrogation sur sa propre conversion.Charles Du Bos devoted an unflagging attention to Flaubert’s work (except for Bouvard et Pécuchet, which, apparently, according to him did not exist, to Madame Bovary and in particular L’Éducation sentimentale. The connection between his essay “Sur le milieu intérieur chez Flaubert”, written in 1921, and extracts from his Journal, from 1923 to 1937, the comparisons with Gogol, Thomas Hardy, Tolstoy, Baudelaire, and Henry James that run through the writings of Du Bos, allow us to follow what he terms “the spiritual experience” of a materiality encompassed in the conquest of the triple demand of the Beautiful, the Living, the Truth. Du Bos detects the power of Flaubert’s work in the “disproportion” of his style, and the power of absorption that forms the density of his prose, showing an

Simulador de manejo forestal de la Selva Pedemontana de Yungas

OpenAIRE

Humano, C.; León Ruíz, S.; Solís, J.

2016-01-01

El objetivo de este trabajo fue desarrollar un software que permita simular la evolución, en un periodo de 25 años, de un rodal nativo sujeto a distintos sistemas de manejo forestal. Este simulador se generó con una base de datos obtenidas de 8 parcelas de medición permanentes de árboles de un tamaño de 1ha, medidas en dos instancias en el año 2003 y 2008. El total de individuos remedidos fue de 4750, en cada uno ellos se determinaron los datos de especie, diámetro altura al pecho (Dap), altu...

Estratégias de manejo de inverno e verão visando ao controle de Conyza bonariensis e Bidens pilosa Winter and summer management strategies for Conyza bonariensis and Bidens pilosa control

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A.M. Oliveira Neto

2010-01-01

Full Text Available Conyza bonariensis é uma das principais plantas daninhas da região Sul do País; com a seleção de biótipos tolerantes e resistentes ao herbicida glyphosate, demandas são crescentes por alternativas de manejo para essa espécie. Com esse intuito, o objetivo do presente trabalho foi avaliar a eficiência de diferentes estratégias de manejo de inverno e de verão sobre o controle de Conyza bonariensis, utilizando a mistura em tanque de glyphosate+2,4-D associada ou não com herbicidas residuais. As combinações de manejo foram realizadas após a colheita do milho safrinha (manejo de inverno, associadas a manejos antecedendo a semeadura da soja (manejo de verão, totalizando 15 tratamentos. Os manejos de inverno avaliados foram eficientes na dessecação das plantas daninhas e mantiveram excelentes níveis de controle residual até a pré-semeadura da cultura da soja. A semeadura da aveia após o manejo de inverno com posterior manejo de verão com glyphosate+2,4-D+diclosulam mostrou-se eficiente no controle de Bidens pilosa. Em todos os manejos em que o herbicida 2,4-D foi associado ao glyphosate houve controle total de Conyza bonariensis.Conyza bonariensis is one of the most important weeds in southern Brazil. The selection of biotypes tolerant and resistant to the herbicide glyphosate has led to increasing demand for alternatives of management strategy to control this species. This work aimed to evaluate the efficiency of different winter and summer management strategy for the control of Conyza bonariensis, by using glyphosate + 2,4-D tank mixtures combined or not with residual herbicides. The different burndown alternatives were applied after corn harvest (winter burndown, associated to applications before soybean sowing (summer burndown with a total of 15 treatments. Winter burndown options evaluated in this research were efficient in weed desiccation and provided excellent levels of residual weed control up to the next summer soybean

Darwin and Teacher: An Analysis of the Mentorship between Charles Darwin and Professor John Henslow.

Science.gov (United States)

McGreevy, Ann

1990-01-01

The paper examines the mentorship between Charles Darwin and his teacher, John Stevens Henslow of Cambridge University (England). The importance of a mentor in stimulating creative productivity is demonstrated through discussion of their teaching and learning styles, their interests, their time spent together, and Henslow's character traits.…

Agency and industry : Charles C. Gillispie’s "The Natural History of Industry," then and now

NARCIS (Netherlands)

Roberts, Lissa L.

2013-01-01

Charles Coulston Gillispie’s “The Discovery of the Leblanc Process” and “The Natural History of Industry” (Isis 48 (1957): 152–70, 398–407) were unique, yet characteristic of their era. Together, they engaged with discussions of the historical relationship between science and industry. While

Estrategia para el manejo de suelos ácidos en frijol (phaseolus vulgaris l. en el estado de Chiapas, Mexico

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Bernardo Villar S\\u00E1nchez

2000-01-01

Full Text Available Estrategia para el manejo de suelos ácidos en frijol (Phaseolus vulgaris L. en el estado de Chiapas, México. Por su contribución en la dieta alimenticia y la generación de empleos, y por existir una ancestral cultura productiva y una superficie de siembra de más de 100 mil hectáreas, el cultivo de frijol es de fundamental importancia en el estado de Chiapas. Sin embargo, se ha determinado una brecha tecnológica de más de 700 kg/ha entre el potencial del cultivo y los rendimientos actuales. Esta es ocasionada por numerosos factores limitantes entre los que destaca la presencia de suelos de baja fertilidad y ácidos. La estrategia adoptada para el manejo de este problema incluye: 1.Aplicación de cal y fósforo; 2. Mejoramiento genético para resistencia; 3.Manejo de los ciclos de materia orgánica y nutrientes del suelo; y 4.Combinación de las tres alternativas. En este reporte se dan los avances obtenidos con relación a la primera alternativa considerada como el paso inicial para el logro de un manejo integral de suelos en Chiapas. Durante 1997 se estudiaron cinco dosis de cal y tres de fósforo en condiciones de invernadero y campo para suelos de diferentes localidades. Se utilizó un experimento factorial completo con cuatro repeticiones, los experimentos fueron evaluados en términos de la producción de grano y al efecto de la cal sobre las propiedades químicas del suelo. Hubo respuesta del frijol en rendimiento a la aplicación de cal y fósforo

Charles Darwin and the origin of life.

Science.gov (United States)

Peretó, Juli; Bada, Jeffrey L; Lazcano, Antonio

2009-10-01

When Charles Darwin published The Origin of Species 150 years ago he consciously avoided discussing the origin of life. However, analysis of some other texts written by Darwin, and of the correspondence he exchanged with friends and colleagues demonstrates that he took for granted the possibility of a natural emergence of the first life forms. As shown by notes from the pages he excised from his private notebooks, as early as 1837 Darwin was convinced that "the intimate relation of Life with laws of chemical combination, & the universality of latter render spontaneous generation not improbable". Like many of his contemporaries, Darwin rejected the idea that putrefaction of preexisting organic compounds could lead to the appearance of organisms. Although he favored the possibility that life could appear by natural processes from simple inorganic compounds, his reluctance to discuss the issue resulted from his recognition that at the time it was possible to undertake the experimental study of the emergence of life.

Manejo de plantas daninhas na cultura da mandioca Weed management in cassava

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D.V. Silva

2012-12-01

Full Text Available A mandioca (Manihot esculenta é cultivada em vários países, sendo de grande importância como fonte de energia para alimentação humana e animal e na geração de empregos e renda. No Brasil, apesar de essa cultura apresentar alto potencial produtivo - em alguns estudos alcançando valores superiores a 100 t ha-1 de raízes - , a produtividade nacional é baixa, atribuída em grande parte ao manejo inadequado das plantas daninhas. A interferência dessas plantas resulta em competição pelos recursos essenciais, como nutrientes, água e luz. Além disso, o controle realizado de maneira incorreta das plantas daninhas nos mandiocais dificulta outros tratos culturais e aumenta os custos de produção. Nesta revisão são abordados os aspectos relativos ao manejo das plantas daninhas na cultura, descrevendo, de forma detalhada, os principais componentes de interferência. Discute-se, em várias situações, o período crítico de competição. Por fim, são apresentados os principais métodos de controle visando à utilização do manejo integrado como forma sustentável do controle de plantas daninhas nessa cultura.Cassava (Manihot esculenta is grown in many countries, being of great importance as an energy source for food, generating jobs and income. Although this crop has been proved to have high yield potential in some studies, reaching values above 100 t ha-1 roots, its national productivity in Brazil is low, being largely attributed to inadequate weed management. The interference of weeds results in competition for essential resources, such as nutrients, water, and light. In addition, incorrectly performed control of weeds in cassava can complicate management and increase production costs. In this review, aspects related to weed management in the culture are described, detailing the main components of interference. The critical period of competition, in many situations, is also discussed. Finally, the main methods of control aimed at the

Nuestro protocolo en el manejo de la tos crónica.

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Blanca Pilar Galindo Torres

2018-05-01

Full Text Available Introducción y objetivo: La tos se considera el principal mecanismo de defensa frente a agentes infecciosos, cuerpos extraños, factores irritantes o para la movilización de secreciones. Se ha descrito una prevalencia de la tos crónica idiopática en adultos de hasta un 20% de la población general, y su evaluación y manejo supone el 40 % del volumen de la consulta. El objetivo es repasar las herramientas diagnósticas que tenemos a nuestro alcance así como la actitud terapéutica a seguir en estos pacientes, para crear así un protocolo de actuación.Material y Método: Se presenta el nuevo protocolo para la evaluación y manejo de la tos crónica realizado en nuestro hospital.Resultados: La identificación de las causas principales de la tos crónica es imprescindible para su manejo; entre ellas, la toma de IECAs, el tabaquismo, el reflujo gastroesofácio, el asma o la rinosinusitis son desencadentantes que se deben descartar. Para ello, resulta útil la realización de la historia médica y el examen físico, así como la búsqueda de síntomas de alarma. Las pruebas diagnósticas más utilizadas son la radiografía de tórax y la espirometría, pudiendo hacerse un estudio exhaustivo para descartar causas más raras con una TAC de alta resolución de tórax o una broncoscopia. El tratamiento se basa en la resolución de la causa que la esté originando, mientras que en los casos de tos idiopática o tos crónica refractaria podría administrarse un tratamiento neuromodulador con fármacos como la Gabapentina o Pregabalina, la Amitriptilina, la Morfina de liberación retardada o el Baclofeno. La logopedia y fisioterapia respiratoria se consideran terapias complementarias que también pueden ayudar a su resolución.Conclusiones: Es importante prestar atención a posibles factores desencadenantes de la tos, así como a los síntomas de alarma. La logopedia puede ser una alternativa eficaz en tos crónica resistente a los tratamientos médicos.

Colloque en hommage à Charles Morazé. : Message d’Elisabeth Badinter.

OpenAIRE

Badinter, Elisabeth; De Pablo, Elisabeth; Bonnemazou, Camille

2005-01-01

Collection "Colloques AAR"; Agrégé d'histoire, spécialiste de l'économie du XIXe siècle et de la bourgeoisie conquérante, fondateur en 1947 de la VIe section de l'Ecole Pratique des Hautes Etudes, qui deviendra l'Ecole des Hautes Etudes en Sciences Sociales, fondateur et organisateur de la Maison des Sciences de l'Homme, sans oublier auteur de plusieurs essais historiques et politiques marquants, Charles MORAZE s’est éteint le 5 janvier 2003. Ce colloque organisé par L’Association pour la Rec...

Experimental Model of Spinal Cord Injury (SCI in rats: management guidelines Modelo Experimental de Lesión de Médula Espinal (SCI en ratas: guías de manejo Modelo Experimental de Lesão Medular (SCI em ratos: diretrizes de manejo

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Asdrubal Falavigna

2013-01-01

Full Text Available Surgical experiments with laboratory animals are necessary for medical research. These studies aim to clarify the mechanism of disease, investigate the action and efficacy of new drugs or biological markers, as well as develop and enhance new therapies and apply new techniques. Regarding the models of spinal cord injury (SCI, there are several different methods that address the handling of the animals, especially concerning the use of analgesics, antibiotics and pre- and postoperative management. The lack of uniformity and standardization among the studies does not allow the understanding of the model of SCI or the proper handling of the paraplegic animals, hampering the adequate interpretation and comparison of results. The goal of this study is to establish a standard protocol on the handling of animals subjected to experimental models of SCI.La realización de experimentos quirúrgicos con animales de laboratorio son necesarios para la investigación médica. Estos estudios tienen por objeto aclarar el mecanismo de las enfermedades, investigar la acción de nuevos medicamentos y marcadores biológicos, así como desarrollar y mejorar nuevas terapias y aplicar nuevas técnicas. En cuanto a los modelos animales de lesión de la médula espinal (SCI, existen varios métodos diferentes que abordan el cuidado de estos animales, especialmente en relación con el uso de analgésicos, antibióticos y manejo pre y post operatorio. La falta de uniformidad y estandarización entre los estudios no permite la comprensión del modelo de SCI o el manejo adecuado del animal parapléjico, lo que dificulta la interpretación y comparación adecuada de los resultados. El objetivo de este estudio es establece un protocolo estándar de manejo de animales sometidos a modelos experimentales de SCI.Experimentações cirúrgicas em nível laboratorial com o uso de animais são necessárias para o desenvolvimento da pesquisa médica. Estes estudos têm o objetivo de

Manejo integrado de la plaga Tetranychus urticae (Acari: Tetranychidae) en cultivos de frutilla del Cinturón Hortícola Platense

OpenAIRE

Gugole Ottaviano, María Fernanda

2013-01-01

En el marco de la sustentabilidad de los sistemas agrícolas, el Manejo Integrado de Plagas propone utilizar todas las técnicas y métodos disponibles y compatibles entre sí, para mantener a la población de una plaga en niveles por debajo de aquellos que causan daño económico. Se basa en el análisis de la relación costo/beneficio, considerando los intereses e impactos sobre los productores, la sociedad y el ambiente. Este sistema de manejo tiene un enfoque ecológico y multidisciplinario que req...

Manejo estomatológico del paciente pediátrico con cardiopatía congénita. Revisión de la literatura

OpenAIRE

Zavala Cornejo, Karla Berenice; Práctica privada, Uruapan Michoacán, México; Vinitzky Brener, Ilan; Universidad Tecnológica de México (Unitec), México; Ramírez Bouchan, Daniel; Hospital del Niño y la Mujer, San Luis Potosí, México

2011-01-01

Las cardiopatías congénitas se definen como lesiones anatómicas del corazón y sus componentes que se presentan en el nacimiento y representan un problema de salud pública de primer orden. Los pacientes afectados presentan sintomatología muy diversa y requieren un manejo estomatológico adecuado y de calidad que les permita mantener su salud bucal sin poner en riesgo su salud general. Existe muy poca literatura sobre el manejo estomatológico del paciente pediátrico con cardiopatía congénita, po...

Primordial spectra of slow-roll inflation at second-order with the Gauss-Bonnet correction

Science.gov (United States)

Wu, Qiang; Zhu, Tao; Wang, Anzhong

2018-05-01

The slow-roll inflation for a single scalar field that couples to the Gauss-Bonnet (GB) term represents an important higher-order curvature correction inspired by string theory. With the arrival of the era of precision cosmology, it is expected that the high-order corrections become more and more important. In this paper we study the observational predictions of the slow-roll inflation with the GB term by using the third-order uniform asymptotic approximation method. We calculate explicitly the primordial power spectra, spectral indices, running of the spectral indices for both scalar and tensor perturbations, and the ratio between tensor and scalar spectra. These expressions are all written in terms of the Hubble and GB coupling flow parameters and expanded up to the next-to-leading order in the slow-roll expansions so they represent the most accurate results obtained so far in the literature. In addition, by studying the theoretical predictions of the scalar spectral index and the tensor-to-scalar ratio with the Planck 2015 constraints in a model with power-law potential and GB coupling, we show that the second-order corrections are important in the future measurements. We expect that the understanding of the GB corrections in the primordial spectra and their constraints by forthcoming observational data will provide clues for the UV complete theory of quantum gravity, such as the string/M-theory.

Manejo de los desechos solidos domiciliarios y hospitalarios [Houesehold and hospital waste management

NARCIS (Netherlands)

Abarca Guerrero, L.

2005-01-01

Se decidió analizar cuál es la situación actual en el manejo de los desechos, con el objetivo de determinar la variación en los índices de generación de los desechos domésticos y establecer cuál es la situación con respecto a algunos hospitales privados. La información servirá de insumo para el

[Charles Miller Fisher: the grandmaster of neurological observation].

Science.gov (United States)

Fukutake, Toshio

2014-11-01

Charles Miller Fisher is widely regarded as the father of modern stroke neurology. He discovered almost all pathomechanisms of cerebral infarction, including embolism from atrial fibrillation, carotid artery disease, and lacunar infarcts and their syndromes, by the most meticulous clinico-pathological observations. Moreover, his work provided the basis for treatments such as anticoagulation, antiplatelet therapy, and carotid endarterectomy. He also contributed greatly to several topics of General Neurology; for example, migraine, normal pressure hydrocephalus, and Miller Fisher syndrome. In his late years, he tried to expand the neurological field to the more complex disorders of human behavior, including hysteria, dementia, and ill-defined pain syndromes. He thus became known as the grandmaster of refined neurological observation. His lifelong detailed studies were crucially important in helping neurologists all over the world recognize disorders and syndromes that had not previously been understood.

Sir Charles Alfred Ballance (1856-1936) and the introduction of facial nerve crossover anastomosis in 1895

NARCIS (Netherlands)

Van de Graaf, Robert C.; Ijpma, Frank F. A.; Nicolai, Jean-Philippe A.

Sir Charles Ballance (1856-1936) was the first surgeon in history to perform a facial nerve crossover anastomosis in 1895. Although, recently, several papers on the history of facial nerve surgery have been published, little is known about this historically important operation, the theoretical

História natural e as idéias de geração e herança no século XVIII: Buffon e Bonnet Natural history and eighteenth-century ideas regarding generation and heredity: Buffon and Bonnet

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Luzia Aurelia Castañeda

1995-10-01

Full Text Available No percurso intelectual da história natural pode-se detectar três aspectos conceituais. O primeiro deles é dado pelo enfoque à taxonomia, na qual o naturalista tinha como objetivo nomear e classificar os seres criados por Deus. O segundo aspecto é dado pelo suporte filosófico da época. O mecanicismo, emprestando seu método de análise à história natural, buscou compreender a engrenagem dos organismos, pois o mundo 'funcionava'. O terceiro aspecto aponta para uma inadequação do método até então utilizado, pois, diante de uma matéria viva que apresentava características distintas da matéria bruta, havia a necessidade de se entender o processo e não apenas decompor os fenômenos para, então, analisá-los. É nesse ponto do percurso que as idéias de geração e herança evidenciam tal inadequação, atribuindo ao ser vivo uma história reprodutiva, na qual a formação do semelhante pelo semelhante tem um papel importante para a compreensão da engrenagem da vida. O presente artigo apresentará uma análise desses aspectos, fundamentada nas idéias de reprodução e herança de Buffon e Bonnet, representantes de escolas distintas de pensamentos: a epigênese e o preformismo, respectivamente.The intellectual course of natural history reveals three conceptual approaches. The first was the taxonomic point of view, where naturalists worked to name and classify the living beings created by God. The second approach was provided by the eighteenth century's philosophical doctrine of mechanism, which lent natural history its method of endeavoring to comprehend the workings of organisms, inasmuch as the world "ran". Calling into question the adequacy of prior message, the third approach argued that living things display characteristics quite distinct from those of non-living matter, making it necessary to understand processes rather than simply decompose phenomena to then analyze them. This inadequacy became apparent at the moment when

Human health improvement in Sub-Saharan Africa through integrated management of arthropod transmitted diseases and natural resources Mejoramiento de la salud humana en África al sur del Sahara mediante el manejo integrado de enfermedades transmitidas por artrópodos y el manejo de recursos naturales

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Johann Baumgärtner

2001-01-01

Full Text Available A concept of an ecosystem approach to human health improvement in Sub-Saharan Africa is presented here. Three factors mainly affect the physical condition of the human body: the abiotic environment, vector-transmitted diseases, and natural resources. Our concept relies on ecological principles embedded in a social context and identifies three sets of subsystems for study and management: human disease subsystems, natural resource subsystems, and decision-support subsystems. To control human diseases and to secure food from resource subsystems including livestock or crops, integrated preventive approaches are preferred over exclusively curative and sectorial approaches. Environmental sustainability - the basis for managing matter and water flows - contributes to a healthy human environment and constitutes the basis for social sustainability. For planning and implementation of the human health improvement scheme, participatory decision-support subsystems adapted to the local conditions need to be designed through institutional arrangements. The applicability of this scheme is demonstrated in urban and rural Ethiopia.Se presenta un concepto, basado en el ecosistema, para el mejoramiento de la salud humana en la región del África al sur del Sahara. Las condiciones físicas del cuerpo humano estan afectadas por tres factores: factores ambientales abióticos, enfermedades transmitidas por vectores, y por los recursos naturales. Este concepto se basa en princípios ecológicos dentro de un contexto social, e identifica tres series de subsistemas para estudio y manejo: subsistemas de enfermedades humanas, subsistemas de recursos naturales y subsistemas participativos de toma de decisiones. En el manejo de enfermedades humanas, así como en el manejo de recursos tales como ganadería o agricultura, se da prioridad a programas preventivos de manejo integrado. El concepto de sostenibilidad ambiental - base para el manejo de materia y de aguas - contribuye

Qualidade física do solo em um latossolo vermelho da região sudoeste dos cerrados sob diferentes sistemas de uso e manejo

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José Antônio Maior Bono

2013-06-01

Full Text Available A busca de sistemas de manejo do solo como aqueles que integram lavoura e pecuária, visando à recuperação e, ou, manutenção da qualidade do solo, é fundamental para o manejo sustentável da agropecuária. A hipótese deste estudo é que o uso do solo em sistema de integração lavoura-pecuária melhora as suas propriedades físicas, contribuindo dessa maneira para uma exploração agrícola sustentável do solo na região sudoeste do Cerrado. O objetivo deste trabalho foi verificar a influência de diferentes sistemas de manejo em algumas propriedades físicas de um solo na região dos Cerrados. O solo é classificado como Latossolo Vermelho distrófico, na região do Cerrado, onde foram avaliados os seguintes sistemas de manejo: solo sob vegetação natural; solo com implantação de lavoura de soja durante um ano e seguido de três anos de pastagens; solo com implantação de lavoura de soja durante quatro anos, seguidos por quatro anos de pastagem; solo com lavoura de soja contínua em sistema de plantio direto; e solo com pastagem continuamente. Foram avaliadas a densidade do solo, a resistência do solo à penetração e a estabilidade dos agregados em água, no período de 1995 a 2006. O uso do solo com a forrageira BRACHIARIA DECUMBENS como pastagem contínua proporcionou menor impacto nas propriedades físicas do solo, em relação aos manejos com integração lavoura-pecuária e lavoura contínua.

POTENCIALIDADES DE Heterorhabditis bacteriophora Poinar CEPA HC1 PARA EL MANEJO DEHypothenemus hampei Ferr . II. COMPATIBILIDAD CON Beauveria bassiana (Balsamo ) Vuillemin y Endosulfan

OpenAIRE

Sánchez, Lourdes; Rodríguez, MayraG

2008-01-01

Heterorhabditis bacteriophora cepa HC1 ha demostrado ser un efectivo agente de control biológico para importantes plagas en las condiciones de Cuba, mostrando también potencialidades para el manejo de la broca del café. Con los objetivos de estudiar el tipo de relaciones que puede establecer con Beauveria bassiana , organismo de amplio uso a escala internacional para el manejo de la broca en condiciones de producción y el insecticida Endosulfan , se ejecutó este trabajo. H. bacteriophora cepa...

A riqueza e composição de formigas como indicadores dos efeitos do manejo florestal de baixo impacto em floresta tropical no estado do Acre

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Patricia Nakayama Miranda

2013-02-01

Full Text Available A sustentabilidade da extração madeireira seletiva depende de avaliações de impacto e monitoramento dos fatores abióticos, vegetação e fauna. Os objetivos deste trabalho foram estimar e comparar a riqueza e composição de formigas em área de manejo florestal sustentável de baixo impacto, no Projeto de Assentamento Chico Mendes, no Acre. As coletas foram realizadas com armadilhas pitfall e extrator de Winkler, em 30 parcelas de 10 x 10 m. As parcelas foram igualmente distribuídas em três tratamentos: (1 manejo - base de árvores exploradas em 2007; (2 queda natural - base de árvores caídas naturalmente em área não manejada; e (3 controle - parcela sem queda de árvore na mesma área não manejada. Para a caracterização da vegetação, foram tomadas medidas das variáveis: densidade arbórea e arbustiva, área basal arbórea e de árvores caídas, espessura de serapilheira e cobertura de dossel. A densidade arbórea foi significantemente maior no tratamento controle que no manejo. Diferenças significativas foram encontradas em cobertura de dossel entre os tratamentos controle e manejo e controle e queda natural. Foram coletadas 88 espécies de formigas, distribuídas em sete subfamílias. Não houve diferença na riqueza de espécies entre os tratamentos. Embora menor similaridade tenha sido encontrada entre os tratamentos manejo e controle, não foram observadas grandes diferenças na composição entre eles. Esses resultados indicaram que, nessa área, a atividade de extração madeireira de baixo impacto não afetou a assembleia de formigas, portanto, funcionalmente, essa forma de manejo não acarretou alterações no ecossistema em relação aos serviços associados às formigas.

ANÁLISIS SOBRE LA APLICABILIDAD DE LAS HERRAMIENTAS DE GESTIÓN AMBIENTAL PARA EL MANEJO DE LOS HUMEDALES NATURALES INTERIORES DE COLOMBIA

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HERRERA ARANGO MARÍA ALEJANDRA

2010-05-01

Full Text Available Como resultado de la investigación de la información sobre la gestión ambiental de los humedales naturales interiores de Colombia, se analiza la aplicabilidad de las herramientas de gestión empleadas en el manejo integral de estos ecosistemas. Para la evaluación de esta información, se identificaron las principales categorías y subcategorías de análisis, partiendo de una clasificación de los humedales naturales interiores presentes en el país y su estado actual, la revisión de la normatividad ambiental vigente, los planes de manejo formulados por diferentes entidades y por último, la identificación de grupos de investigación de Colciencias que realizan estudios sobre este tema. Con base en estos resultados, se sistematiza la información encontrada, generando con ello una aproximación a una propuesta de análisis que contribuya a orientar futuras investigaciones y a la toma de decisiones acerca del manejo racional de los humedales en el país.

"Cracking Open the Natural Teleology": Walter Benjamin, Charles Fourier and the Figure of the Child

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Dolbear, Sam; Proctor, Hannah

2016-01-01

The French utopian socialist Charles Fourier is a key figure in Walter Benjamin's "Arcades Project". For Benjamin, one of the most significant aspects of Fourier's utopian vision was its conceptualisation of work as a form of play. According to Fourier it would be possible to build a world around people's inherent desires. In such a…

Potential effects of structural controls and street sweeping on stormwater loads to the lower Charles River, Massachusetts

Science.gov (United States)

Zarriello, Phillip J.; Breault, Robert F.; Weiskel, Peter K.

2002-01-01

The water quality of the lower Charles River is periodically impaired by combined sewer overflows (CSOs) and non-CSO stormwater runoff. This study examined the potential non-CSO load reductions of suspended solids, fecal coliform bacteria, total phosphorus, and total lead that could reasonably be achieved by implementation of stormwater best management practices, including both structural controls and systematic street sweeping. Structural controls were grouped by major physical or chemical process; these included infiltration-filtration (physical separation), biofiltration-bioretention (biological mechanisms), or detention-retention (physical settling). For each of these categories, upper and lower quartiles, median, and average removal efficiencies were compiled from three national databases of structural control performance. Removal efficiencies obtained indicated a wide range of performance. Removal was generally greatest for infiltration-filtration controls and suspended solids, and least for biofiltration-bioretention controls and fecal coliform bacteria. Street sweeping has received renewed interest as a water-quality control practice because of reported improvements in sweeper technology and the recognition that opportunities for implementing structural controls are limited in highly urbanized areas. The Stormwater Management Model that was developed by the U.S. Geological Survey for the lower Charles River Watershed was modified to simulate the effects of street sweeping in a single-family land-use basin. Constituent buildup and washoff variable values were calibrated to observed annual and storm-event loads. Once calibrated, the street sweeping model was applied to various permutations of four sweeper efficiencies and six sweeping frequencies that ranged from every day to once every 30 days. Reduction of constituent loads to the lower Charles River by the combined hypothetical practices of structural controls and street sweeping was estimated for a range

Conteúdo de carbono orgânico em planossolo háplico sob sistemas de manejo do arroz irrigado

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Carla Machado da Rosa; Rosa Maria Vargas Castilhos; Eloy Antonio Pauletto; Clenio Nailto Pillon; Otávio dos Anjos Leal

2011-01-01

Nos solos de várzea da região Sul do Rio Grande do Sul, onde um milhão de hectares são cultivados com arroz irrigado por alagamento em diferentes sistemas de manejo, a influência da condição de má drenagem e alternância entre ciclos de oxidação e redução sobre o conteúdo de C orgânico do solo (COS) é pouco conhecida. Este estudo foi realizado em um experimento de longa duração (21 anos), localizado no município do Capão do Leão, RS, com o objetivo de avaliar o efeito de sistemas de manejo do ...

Producción de café (Coffea Arabica L. en respuesta al manejo específico por sitio de la fertilidad del suelo

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Luz Adriana Lince Salazar

2016-12-01

Full Text Available El estudio de la variabilidad espacial es el principal insumo para el manejo específico por sitio MES, con el fin de optimizar los recursos, al reducir los costos de producción de los cultivos y el impacto negativo sobre el ambiente. Con el objetivo de determinar el efecto del MES en la producción del café, durante los años 2011 y 2012 se realizó un experimento del manejo de la fertilidad del suelo en café (Coffea arabica L., Variedad Castillo® en lotes con áreas diferentes (1,0, 2,0 y 3,5 ha, ubicados en tres fincas del departamento del Quindío, Colombia. Se evaluó el efecto de tres tratamientos en la producción de café cereza: i testigo sin fertilización; ii manejo de acuerdo a los resultados de los análisis de suelo, logrados mediante un muestreo convencional en zigzag y, iii manejo por sitio específico conforme lo indicaron las áreas homogéneas, obtenidas mediante mapas de variabilidad espacial. En ninguno de los lotes hubo efecto de los tratamientos, respuesta que se relacionó con uno o más de los siguientes factores: tiempo relativamente corto de evaluación, fertilidad del suelo, reservas de los nutrientes en las plantas, y el número reducido de repeticiones (tres por tratamiento.

CONTROL BIOLÓGICO COMO HERRAMIENTA SUSTENTABLE EN EL MANEJO DE PLAGAS Y SU USO EN EL ESTADO DE NAYARIT, MÉXICO

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Cambero-Campos OJ

2013-07-01

Full Text Available Con el objetivo de concentrar la información referente a parasitoides reportados para el estado de Nayarit, México se realizó la presente revisión. Los insecticidas representan una de las principales armas para el manejo de plagas agrícolas, provocan altos costos económicos, contaminación ambiental, disminución de organismos benéficos y especies silvestres, intoxicaciones, efectos negativos sobre aplicadores y personas relacionadas con el manejo de plaguicidas y el desarrollo de resistencia a plaguicidas de diversas especies consideradas plaga. Una alternativa ante esta problemática es el uso de organismos benéficos, como son los depredadores, entomopatógenos y parasitoides que brindan la regulación de la plaga debido a la relación densodependiente que establecen, no son nocivos para el ser humano y no contaminan. El uso y manejo de enemigos naturales representa una estrategia sustentable, ecológica que no afecta el equilibrio biológico y conocer cuáles son los organismos presentes en el estado de Nayarit, ofrece una herramienta técnica, estratégica para integrar los programas de manejo de plagas agrícolas en función al comportamiento del organismo plaga y agente de control biológico, cultivo, distribución, condiciones ambientales óptimas y organismos preferenciales para su crecimiento y desarrollo. Se concluye que para el estado de Nayarit México, se tienen reportadas 36 especies de parasitoides que se encuentran de forma natural o fueron introducidos por el ser humano con el objetivo de disminuir la población de alguna plaga.

ToF-SIMS imaging of capsaicinoids in Scotch Bonnet peppers (Capsicum chinense).

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Tyler, Bonnie J; Peterson, Richard E; Lee, Therese G; Draude, Felix; Pelster, Andreas; Arlinghaus, Heinrich F

2016-06-13

Peppers (Capsicum spp.) are well known for their ability to cause an intense burning sensation when eaten. This organoleptic response is triggered by capsaicin and its analogs, collectively called capsaicinoids. In addition to the global popularity of peppers as a spice, there is a growing interest in the use of capsaicinoids to treat a variety of human ailments, including arthritis, chronic pain, digestive problems, and cancer. The cellular localization of capsaicinoid biosynthesis and accumulation has previously been studied by fluorescence microscopy and electron microscopy, both of which require immunostaining. In this work, ToF-SIMS has been used to image the distribution of capsaicinoids in the interlocular septum and placenta of Capsicum chinense (Scotch Bonnet peppers). A unique cryo-ToF-SIMS instrument has been used to prepare and analyze the samples with minimal sample preparation. Samples were frozen in liquid propane, cryosectioned in vacuum, and analyzed without exposure to ambient pressure. ToF-SIMS imaging was performed at -110 °C using a Bi3 (+) primary ion beam. Molecular ions for capsaicin and four other capsaicinoids were identified in both the positive and negative ToF-SIMS spectra. The capsaicinoids were observed concentrated in pockets between the outer walls of the palisade cells and the cuticle of the septum, as well as in the intercellular spaces in both the placenta and interlocular septum. This is the first report of label-free direct imaging of capsaicinoids at the cellular level in Capsicum spp. These images were obtained without the need for labeling or elaborate sample preparation. The study demonstrates the usefulness of ToF-SIMS imaging for studying the distribution of important metabolites in plant tissues.

UBICACIÓN Y MANEJO PARA LA DISPOSICIÓN FINAL DE LOS RESIDUOS SÓLIDOS DE ÍNDOLE MUNICIPAL DE LA CIUDAD DE PUNO - 2015

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ALOSILLA VICTORIA, LUCIO GILBERTO

2016-01-01

SITUACIÓN ACTUAL DEL MANEJO DE LOS RESIDUOS SÓLIDOS. UBICACIÓN Y MANEJO DE LOS RESIDUOS SÓLIDOS MUNICIPIOS CON SERVICIO DE RECOLECCIÓN DOMICILIARIA DE RESIDUOS RESIDUOS SÓLIDOS MUNICIPALES LA POLÍTICA PÚBLICA PERUANA EN MATERIA DE RESIDUOS SÓLIDOS GESTIÓN INTEGRAL DE LOS RESIDUOS SÓLIDOS URBANOS PREVENCIÓN DE RESIDUOS SÓLIDOS MEJORAMIENTO PARA UNA POLÍTICA INTEGRAL GOBIERNOS LOCALES EL RELLENO SANITARIO PRINCIPALES NECESIDADES Y REQUERIMIENTOS DEL SERVICIO DE RECOLECCIÓN DE BASURA E...

'A Photographic Scramble through Spain': El papel del libro de Charles Clifford en la divulgación de una imagen de España / An image of Spain in Charles Clifford’s book

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Rachel Bullough

2013-09-01

Full Text Available Al fotógrafo británico, Charles Clifford (1819-1863 se le conoce como uno de los pioneros de la fotografía comercial en España. Sin embargo, hasta ahora, poco se sabe sobre el papel que jugó su libro A Photographic Scramble through Spain como complemento a sus fotografías. Este trabajo analiza el uso del libro, no sólo como herramienta comercial, sino en su papel de proyectar la imagen de España que Clifford deseaba mostrar a sus clientes y lectores en el Reino Unido.The British photographer, Charles Clifford (1819-1863 is best known as one of the pioneers of commercial photography in Spain. However, until now, little has been said about the role of his book, A Photographic Scramble through Spain as a complement to his photographs. This study will show how Clifford not only used the book as a commercial instrument but also as a means to convey the image of Spain that he wished to show to his potential buyers and readers in the United Kingdom 

Evaluación biológica del manejo de picudos y nematodos fitopatógenos en plátano (musa aab)

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González Cardona, Carolina; Aristizábal Hincapié, Juan Camilo; Aristizábal Loaiza, Manuel

2010-01-01

El trabajo se desarrolló en la granja Montelindo, municipio de Palestina (Caldas) a 5° 05' N y 75° 40' O, a 1010 m.s.n.m., 23.5 °C, precipitación anual de 2100 mm y humedad relativa de 76%, con el fin de generar información sobre el manejo de picudos y nematodos fitoparásitos del plátano. Se usó un diseño en bloques completos al azar con cuatro tratamientos por bloque, tres repeticiones y 24 plantas por repetición. Para el manejo de los picudos se hicieron aplicaciones de Carbofurán, Beauveri...

Co-digestión anaerobia de vinaza y gallinaza de jaula: alternativa para el manejo de residuos agrícolas colombianos

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Marin-Batista, José; Salazar, Luis; Castro, Liliana; Escalante, Humberto

2016-01-01

La digestión anaerobia es una tecnología atractiva para el manejo de residuos al producir energía en forma de biogás y estabilizar la materia orgánica. En este estudio, se evaluó el proceso de co-digestión de vinaza y gallinaza de jaula como una alternativa de manejo y estabilización de residuos generados por la agroindustria colombiana. Se llevaron a cabo, ensayos de biometanización en relaciones de mezcla vinaza y gallinaza de 1:0, 3:1, 1:3 y 0:1 en base a VS. La relación de 3:1 de vinaza y...

Relación Entre las Estrategias de Manejo del Conflicto y la Percepción de la Violencia Situacional en la Pareja

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MARÍA DEL PILAR MÉNDEZ SÁNCHEZ; MIRNA GARCÍA MÉNDEZ

2015-01-01

Se buscó determinar si las estrategias de manejo del conflicto influyen en la violencia situacional en la pareja. A una muestra de 342 participantes se le aplicó la Escala de Estrategias de Manejo de Conflicto y la Escala de Violencia en la Pareja. Los resultados indicaron que los hombres muestran mayor afecto, tiempo y acomodación que las mujeres ante los conflictos de pareja; sin embargo, ellas perciben más violencia física y económica, así como mayor intimidación y humillación/devaluación....

Estudio de impacto ambiental Expost y el plan de manejo ambiental para el Batallón de Infantería 19 Carchi

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Quezada Yaguache, Galo Efrén

2016-01-01

La realización del proyecto, estudio de impacto ambiental Expost y Plan de Manejo Ambiental para el Batallón de Infantería 19 Carchi, contempló acciones previas donde se estableció información relevante en base a características Físicas y microbiológicas del agua, para lo cual se realizaron pruebas de laboratorio en la cual se obtuvo impactos negativos despreciables en el componente Abiótico o biótico de tal manera que serán mitigados en las diferentes acciones propuestas en el plan de manejo...

O cuidado materno no manejo da asma infantil contribuição da enfermagem transcultural El cuidado materno en el manejo del asma infantil - contribución de enfermería transcultural Maternal care in the management of child asthma: the contributions of transcultural nursing

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Maíra Domingues Bernardes Silva

2009-12-01

Full Text Available O objeto deste estudo são as práticas culturais do cuidado materno no manejo da asma infantil. Objetivos: descrever o conhecimento e o cuidado materno sobre a asma infantil e analisar o cuidado materno no manejo da asma infantil. Estudo descritivo-exploratório desenvolvido a partir de questionários e entrevistas com mães de crianças com asma, no período de setembro de 2008 janeiro de 2009. Após análise temática dos dados, emergiram três categorias: 1 Conceito e manejo da asma na visão das mães cuidadoras; 2 Asma como sofrimento e risco para a vida dos filhos; 3 Plantas medicinais, simpatias e religiosidade no cuidado do filho com asma. Concluiu-se que é importante respeitarmos a cultura das mães cuidadoras das crianças com asma, para que seus valores possam ser preservados, acomodados e reestruturados junto ao cuidado profissional.El objeto de este estudio es analizar las prácticas culturales de la atención materna en el manejo del asma infantil. Objetivos: describir el conocimiento y el cuidado de la madre en relación con el asma infantil y analizar la atención materna en el manejo del asma infantil. Estudio exploratorio-descriptivo desarrollado a partir de cuestionarios y entrevistas con madres de niños con asma, en el período comprendido entre Septiembre de 2008 y Enero del 2009. Tras el análisis temático de los datos, surgieron tres categorías: 1 Concepto y manejo del asma en la visión de las madres que cuidan de sus hijos con asma, 2 El asma como sufrimiento y riesgo para la vida de los hijos, 3 Plantas medicinales, rituales y religiosidad en el cuidado del hijo con asma. Se concluyó que es importante respetar la cultura de las madres que cuidan de los niños con asma, de modo que sus valores puedan ser preservados, acomodados y reestructurados junto a la atención profesional.The object of this study is the cultural practices of maternal care in the management of childhood asthma. Objectives: to describe both

Estrategia de manejo de plagas en el cultivo del filodendro (PHILODENDRON scandens).

OpenAIRE

Odalis Corbea Suárez; Moisés Figueroa Hernández; Manuel Pérez Quintana

2010-01-01

Se evaluaron Estrategias de  Manejo de plagas que contribuyeron a la recuperación de la estética del Philodendron  scandens    en el Hotel Meliá Varadero. Se estimuló y protegió la presencia de biorreguladores  con  la reducción de la carga tóxica. Durante los años 2001 al 2004 se realizaron estudios de las características del ecosistema tales como la interacción de los factores bió...

ESTRUTURA DO SOLO SOB FEIJÃO IRRIGADO E DIFERENTES MANEJO DO SOLO

OpenAIRE

Lorena Adriana de Gennaro; Zigomar Menezes de Souza; Laura Fernanda Simões da Silva; Miguel Cooper; Milton César Costa Campos

2015-01-01

O manejo agrícola influencia a estrutura do solo, modificando os atributos físicos e o comportamento hídrico do solo. O objetivo deste trabalho foi avaliar os efeitos da semeadura direta (SD) e do preparo convencional (PC) sobre a estrutura do solo, por meio de atributos físicos e da distribuição dos poros, utilizando imagens digitais 2-D. O estudo foi realizado em um Latossolo Vermelho distroférrico com delineamento de blocos casualizados. A densidade do so...

Irrigation Water Management in Latin America Manejo del Agua de Riego en Sudamérica

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Aureo S de Oliveira

2009-12-01

Full Text Available Latin American countries show a great potential for expanding their irrigated areas. Irrigation is important for strengthening local and regional economy and for enhancing food security. The present paper aimed at providing a brief review on key aspects of irrigation management in Latin America. Poor irrigation management can have great impact on crop production and on environment while good management reduces the waste of soil and water and help farmers maximizing their profits. It was found that additional research is needed to allow a better understanding of crop water requirements under Latin American conditions as well as to provide farmers with local derived information for irrigation scheduling. The advantages of deficit irrigation practices and the present and future opportunities with the application of remote sensing tools for water management were also considered. It is clear that due to the importance of irrigated agriculture, collaborative work among Latin American researchers and institutions is of paramount importance to face the challenges imposed by a growing population, environment degradation, and competition in the global market.Los países sudamericanos tienen un gran potencial para aumentar sus áreas regadas. El riego es importante para fortalecer las economías locales y regionales y para mejorar la seguridad alimentaria. Esta revisión tiene por objeto proporcionar un resumen de los aspectos más importantes del manejo del riego en Sudamérica. Un manejo pobre del riego puede tener un alto impacto en la producción de cultivos y en el ambiente, en tanto que un buen manejo reduce las pérdidas de suelo y agua, y ayuda a los productores a maximizar sus ingresos. Se encontró que se requiere investigación adicional que permita una mejor comprensión de los requerimientos de agua de los cultivos en las condiciones sudamericanas, y también para proporcionar a los agricultores información local que permita hacer programaci

Creative work. The case of Charles Darwin.

Science.gov (United States)

Gruber, H E; Wallace, D B

2001-04-01

The evolving systems approach (ESA) addresses the need for direct study of the creative process in recognized creators at work, in contrast to indirect methods, such as those used in psychometric studies. The ESA emerged from H. E. Gruber's prolonged study of Charles Darwin's manuscripts, especially the notebooks he kept after the Beagle voyage. Gruber's interviews with J. Piaget about the latter's creative processes, as well as many doctoral dissertations, also helped shape the authors' approach. Using Gruber's (1974/1981) study of Darwin, the authors describe some facets of creative work identified in the course of their work. Among these are networks of enterprise, ensembles of metaphors, insights, and evolving belief systems. Although the ESA emphasizes cognitive processes, social, affective, and esthetic aspects of the case are not neglected. Each creative case is unique, otherwise the individual would not meet the criterion of originality. Uniqueness does not mean isolation; people who differ must and do work together. The integration of all these facets into a plausible system for each creator remains the authors' central task.

Will Higher Education Pass "A Test of Leadership"? An Interview with Spellings Commission Chairman Charles Miller

Science.gov (United States)

Callan, Pat

2007-01-01

Charles Miller, former chairman of the University of Texas System's Board of Regents, chaired the recent Commission on the Future of Higher Education created by Secretary of Education Margaret Spellings. Here he is interviewed regarding the panel's widely discussed report, "A Test of Leadership," by Pat Callan, president of the National…

75 FR 54381 - Charles M. Russell National Wildlife Refuge and UL Bend National Wildlife Refuge, MT

Science.gov (United States)

2010-09-07

... DEPARTMENT OF THE INTERIOR Fish and Wildlife Service [FWS-R6-R-2010-N078; 60138-1261-6CCP-S3] Charles M. Russell National Wildlife Refuge and UL Bend National Wildlife Refuge, MT AGENCY: Fish and Wildlife Service, Interior. ACTION: Notice of availability: Draft comprehensive conservation plan and draft...

Academic or Community Resource? Stakeholder Interests and Collection Management at Charles Sturt University Regional Archives, 1973-2003

Science.gov (United States)

Boadle, Don

2003-01-01

This analysis of the transformation of the Charles Sturt University Regional Archives from a library special collection to a multi-function regional repository highlights the importance of stakeholder interests in determining institutional configurations and collection development priorities. It also demonstrates the critical importance of…

Problemas identificados en el manejo de la enfermedad diarreica aguda

Directory of Open Access Journals (Sweden)

Carlos Coronel Carbajal

2000-08-01

Full Text Available Se realizó un estudio retrospectivo de corte transversal en el Hospital "Armando E. Cardoso", en el período de 1 año (Mayo 98-Febrero 99. Este estudio consistió en encuestar a 256 madres de niños con diarreas agudas con el objetivo de identificar las costumbres inapropiadas que aún persisten en el manejo ambulatorio de las enfermedades diarreicas. Al concluir el estudio se pudo apreciar cómo en el 56,3 % de los pacientes hubo mal manejo alimentario, además solo el 12,1 % de las madres buscaron orientación médica en las primeras 24 horas. En este estudio se pudo conocer que el 100 % de las madres saben que las soluciones de rehidratación oral (SRO forman parte del tratamiento de la EDA, pero solo el 42 % conoce que previenen la deshidratación, además solo un 25 % conoce de otros líquidos que reemplazan el uso de las soluciones de rehidratación oralA cross-sectional study was conducted at the "Armando E. Cardoso" Hospital from May, 1998, to February,1999. 256 mothers of children with acute diarrhea were surveyed in order to identify the inappropiate costums that still exist in the ambulatory management of diarrheal diseases. A poor food management was observed in 56.3% of the patients and only 12.1% of the mothers looked for medical advice during the first 24 hours. It was possible to know through this study that 100% of the mothers know that oral rehydration solutions (ORS are part of the treatment of ADD, but only 42% know that the drug also prevents dehydration. Just 25% know about other fluids that replace the use of oral rehydration solutions

Desarrollo radical en plantas de duraznero sometidas a diferentes manejos del suelo

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GONZALEZ, J.1;

2012-10-01

Full Text Available El objetivo de este trabajo fue evaluar la incidencia del sistema de manejo y la textura del suelo sobre el desarrollo del sistema radicular y el diámetro de tronco del duraznero cv Dixiland cultivado sobre un Argiudol vértico de la Serie Ramallo bajo condiciones de secano, en el norte de la provincia de Buenos Aires, Argentina.Se ensayó con tres sistemas de manejo del suelo: labores mecánicas, sin labranza con control químico de malezas y cobertura vegetal. Se caracterizó la distribución de raíces en sentido horizontal y vertical por medio del número de raíces obtenido con el método de “trinchera”. Se determinó la densidad aparente con el método del cilindro, la textura de los horizontes del suelo hasta los 75 cm de profundidad y el diámetro de tronco.Los resultados obtenidos mostraron que, tanto el laboreo mecánico como el no laboreo del suelo con control químico de malezas, están asociados a un mayor desarrollo del diámetro del tronco y del sistema radicular en los primeros 40 cm. de profundidad respecto del tratamiento con cobertura vegetal. El desarrollo del estratosuperficial de raíces se ve restringido, tanto por el laboreo mecánico como por la cobertura vegetal del sueloy la textura explica su desarrollo en profundidad.

Guía práctica para la identificación y manejo de plagas en hortalizas Guía práctica para la identificación y manejo de plagas en hortalizas

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Figueroa P. Adalberto

1986-03-01

Full Text Available Guía práctica para la identificación y manejo de plagas en hortalizas La guía práctica comprende una descripción de los insectos, ácaros y moluscos que atacan los cultivos hortícolas en nuestro país. Se registraron 33 especies hortícolas pertenecientes a 10 familias botánicas que por su afinidad bioquímica atraen las mismas plagas. Se describieron 52 plagas con las respectivas recomendaciones de manejo. También se presentan las alternativas para un control eficaz con enfoque ecológico.This work is proposed as a practical guide for the identification and management of the vegetables pests. It comprises a description of insects, acarimolluscs that attack the vegetable crops in our country. The 33 horticultural especies here registered as attacked by insect pest belong to 10 botanical families, which due to their biochemical affinity, attract the same insects. 52 insect pests are described management, with the corresponding recommendations for the han dling of each one, also alternative for the efficacious control are given, from an ecological point of view.

Manejo de água e de fertilizante potássico na cultura de arroz irrigado Water and potassium fertilization management for irrigated rice cultivation

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Alberto Baêta dos Santos

1999-04-01

Full Text Available O manejo da água de irrigação e as doses e épocas de aplicação de fertilizantes tornam-se aspectos de extrema importância no êxito do aproveitamento das várzeas para o cultivo de arroz (Oryza sativa L. irrigado ou este seguido de outras espécies. Com o objetivo de comparar distintas formas de manejo de água e de fertilizante potássico no comportamento do arroz irrigado, foram conduzidos experimentos por três anos consecutivos, em um Inceptissolo. Foram estudados os efeitos de manejo de água (MA1 - inundação contínua e MA2 - inundação intermitente seguida de contínua e o modo de aplicação de fertilizante potássico (K1 - na semeadura; K2 - parcelada e K3 - meia dose parcelada. O manejo de água apresentou efeito mais expressivo sobre o comportamento do arroz que o do fertilizante potássico. A inundação contínua durante todo o ciclo da cultura proporcionou maiores rendimentos de grãos, expressando maiores valores dos parâmetros produtivos, e melhorou a qualidade industrial dos grãos. Com esta irrigação, o parcelamento da adubação potássica aumentou o aproveitamento do fertilizante. Os manejos do fertilizante potássico afetaram diferentemente o comportamento da cultura do arroz nas distintas formas de manejo de água.Irrigation water levels and timing of potassium fertilization is extremely important for the use of lowlands for irrigated rice (Oryza sativa L. cultivation in crop rotation. A field experiment was conduced for three consecutive years in Inceptisol to study the effects of water management (WM1 - continuous flooding and WM2 - intermittent flooding followed continuous flooding and mode of potassium fertilizer application (K1 - at sowing; K2 - fractional application and K3 - fractional application of half levels on grain yield and yield components of irrigated rice. Water management presented expressive effect on rice performance as compared to potassium fertilization. Continuous flooding during whole

Challenge and Risk: The Parlerian Statues on the Old Town Tower of Charles Bridge. A Reinterpretation

Czech Academy of Sciences Publication Activity Database

Hlobil, Ivo

2015-01-01

Roč. 63, 1/2 (2015), s. 2-33 ISSN 0049-5123 R&D Projects: GA ČR GA13-39192S Institutional support: RVO:68378033 Keywords : Prague * Charles Bridge * statues * interpretation Subject RIV: AL - Art, Architecture, Cultural Heritage http://www.umeni-art.cz/cz/issue-detail.aspx?v=issue-issue-2479

75 FR 67095 - Charles M. Russell National Wildlife Refuge and UL Bend National Wildlife Refuge, Montana

Science.gov (United States)

2010-11-01

... DEPARTMENT OF THE INTERIOR Fish and Wildlife Service [FWS-R6-R-2010-N215; 60138-1261-6CCP-S3] Charles M. Russell National Wildlife Refuge and UL Bend National Wildlife Refuge, Montana AGENCY: Fish and Wildlife Service, Interior (DOI). ACTION: Notice; extension of comment period. SUMMARY: We, the U.S. Fish...

El aluminio en el suelo y algunas estrategias de manejo

OpenAIRE

Fabio Emilio Forero-Ulloa; Pablo Antonio Serrano-Cely; William Alberto Balaguera-López

2011-01-01

El  suelo  está  compuesto por diversos  elementos entre  los que  se destaca el aluminio, como un metal que, en condiciones  normales,    no  afecta  el desarrollo de las plantas,  pero en suelos ácidos  es un factor limitante en el crecimiento de la mayoría de especies vegetales,  con una afectación cercana al 50% del área sembrada  en el ámbito mundial. En Colombia  cerca del  85% de  los  suelos  son ácidos,  por lo cual es  necesario buscar estrategias de manejo  y  permitir  que  estos ...

Changes in the forest landscape of the Charles C. Deam wilderness, Southern Indiana, 1939-1990

Science.gov (United States)

MIchael A. Jenkins; George R. Parker

2000-01-01

We used aerial photographs from 1939, 1974, and 1990 to examine how land cover has changed on the 5,286-ha Charles C. Deam Wilderness of Hoosier National Forest over this time span. Digital elevation models were used to examine changes in land-cover class (closed-canopy forest, open forest, agriculture/old-field, clearcut, and pine plantation) within each land type (...

REGULAÇÃO DE FLORESTAS INEQUIÂNEAS SOB MANEJO FLORESTAL COMUNITÁRIO

OpenAIRE

SILVA, D. A. S.

2014-01-01

SILVA, D. A. S. Regulação em florestas inequiâneas sob regime de manejo florestal comunitário. 2014. Dissertação (Mestrado em Ciências Florestais) Universidade Federal do Espírito Santo, Jerônimo Monteiro, ES. Orientador: Prof. Dr. Gilson Fernandes da Silva. Coorientador: Prof. Dr. José Franklim Chichorro. O planejamento de exploração madeireira em florestas inequiâneas, é determinado de tal forma que uma parcela da floresta seja dividida em Unidade de Produção Anual (UPA), e estas, por s...

Physical soil stability under different management of extensive pasture in haplumbrept soils /Estabilidade física de solo sob diferentes manejos de pastagem extensiva em cambissolo

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Ricardo Ralisch

2010-09-01

Full Text Available In the dairy cattle production of the small region of São João Del Rei (MG - Brazil it is common to manage extensive native pastures with annual fires on low natural fertility Haplumbrept soils. The objective of this work was to evaluate the physical stability by measuring the degree of clay flocculation of a Haplumbrept soil under different management systems of extensive pastures. The evaluations were done using three types of managements: native pasture without fire; native pasture with fire, and recovered pasture. For each treatment it was selected one “sub area” of 1 hectare, located at the middle hillside with declivity between 10 and 12%, where, in the month of June 2007, 50 randomized deformed soil samples were collected/studied, in the layer of 0-10 cm to evaluate the degree of clay flocculation, pH, DpHH2O, pHKCl (1N, zero point charge (PCZ. The systems of soil management did influence the degree of clay flocculation, with the lowest values found in pasture with annual burning and recovered pasture. The recovery of pasture in this fragile soil requires care with physical and chemical soil management.Na pecuária leiteira da Microrregião de São João Del Rei (MG é comum o manejo de pastagem nativa extensiva com utilização de queimadas anuais em Cambissolo, considerados de baixa fertilidade natural. O objetivo deste trabalho foi avaliar a estabilidade física a partir da determinação do grau de floculação da argila de Cambissolo sob diferentes manejos de pastagem extensiva. As avaliações foram realizadas em três tipos de manejos: pastagem nativa manejada sem queimada; passagem nativa manejada com queimada e pastagem recuperada. Em cada manejo selecionou-se uma “sub área” de 1 hectare, situada em meia encosta com declive entre 10 – 12%. Em junho / 2007, foram coletadas 50 amostras deformadas de solo de forma inteiramente casualizada, na camada de 0-10 cm, para determinação do grau de floculação da argila, pHH2

Sistema especialista como ferramenta de apoio às boas práticas de manejo da tilapicultura

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Ana Flavia Rodrigues Seixas

2009-12-01

Full Text Available A piscicultura brasileira, tem impulsionado a economia devido ao seu crescimento em torno de 30% ao ano, como também por tratar-se de fonte de proteína de alta qualidade e pela alta lucratividade. De origem africana, a tilapicultura está presente hoje em grande parte do território nacional, mas ainda sofrendo as pressões por maior qualidade do produto e adoção de práticas menos impactantes ao ambiente. Entre alguns desses impactos citam-se as poluição e interferências em níveis de biodiversidade e de qualidade da água. Assim, o produtor carece de informação e ferramentas que favoreçam a rápida transferência de práticas já identificadas pela pesquisa, que aumentem seu conhecimento e agilidade na incorporação destas às atividades da propriedade. O projeto “ Manejo e Gestão Ambiental da Aqüicultura” da Embrapa Meio Ambiente, componente do projeto em rede Aquabrasil, vem identificando Boas Práticas de Manejo (BPM de tilápia passíveis de uso imediato pelo produtor a partir de sua rápida observação da propriedade. Nele, o sistema informatizado Aquisys está em desenvolvimento para viabilizar o acesso dinâmico, via web, às avaliações e indicadores de produção, manejo e qualidade de água em atenção às BPM de tilápia. Este trabalho apresenta uma das ferramentas computacionais desenvolvidas: um sistema especialista de rápida avaliação de BPM na propriedade, desenvolvido em linguagem CLIPS.

Conservación in vitro: una perspectiva para el manejo de los recursos fitogenéticos

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Miguel Macgayver Bonilla Morales

2015-03-01

Full Text Available Los recursos fitogenéticos comprenden la diversidad vegetal cultivada que tiene un valor real o potencial en la seguridad alimentaria de la humanidad.Desde esta perspectiva, cada una de las especies que han presentado un proceso de domesticación tanto a nivel local o mundial, asociandosus parientes silvestres, poseen un patrimonio genético invaluable. Por tal motivo, las especies cultivadas pueden beneficiarse mediante el flujogenético de sus parientes en busca de resistencia a plagas y enfermedades, fitomejoramiento o material adaptado al cambio climático. De tal manera,la conservación del germoplasma que posee una especie es prioridad para mantener la variabilidad genética inter e intra-especifica, así como la desus accesiones. Las estrategias de conservación ex situ, en campo, presentan el riesgo de pérdida por condiciones climáticas adversas, ataque deagentes patógenos, altos costos asociados al manejo agronómico, preparación de terreno, insumos y dificultad del manejo e intercambio de material.No obstante, las técnicas de cultivo de tejidos vegetales permiten mantener las plántulas en bancos de germoplasma in vitro, libres de patógenos,en espacio reducido, a bajo costo y condiciones controladas que facilitan el manejo a corto y largo plazo de material vegetal, particularmente, deespecies con propagación vegetativa. Esta investigación tuvo como objetivo determinar los componentes claves para introducir especies cultivadasy establecer bancos de germoplasma in vitro que faciliten el intercambio de material vegetal entre entidades y personas, para garantizar la conservación,disponibilidad y uso de la diversidad genética obtenida por los cultivadores.

MANEJO DO CRESCIMENTO DIAMÉTRICO DE Araucaria angustifolia (Bert. O. Ktze. BASEADO NA ÁRVORE INDIVIDUAL

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Leif Nutto

2001-04-01

Full Text Available Neste trabalho, foi analisado o potencial do crescimento diamétrico de Araucaria angustifolia (Bert. O. Ktze. em diferentes sítios, com o objetivo de obter informações para o manejo dessa espécie em florestas heterogêneas inequiâneas, visando à produção de madeira de alta qualidade em árvores pré-selecionadas. O material usado constitui-se de 400 árvores de florestas nativas e plantios, crescendo sob condições e tratamentos variáveis nos estados de Santa Catarina, Paraná e Rio Grande do Sul. O método usado para investigar a relação entre a largura da copa e o dap foi baseado na projeção horizontal da copa da árvore individual. Usando 16 amostras de 25 árvores, foram estudados vários estágios de desenvolvimento. Para cada amostra, foi feito um mapa de distribuição das árvores e das projeções das copas para avaliar o efeito da competição. O estudo mostra que existe uma estreita relação entre a largura da copa e o dap, que pode ser usada para o desenvolvimento de novas ferramentas de decisão aplicáveis em árvores individuais para o manejo de araucária em florestas heterogêneas inequiâneas ou para a produção de madeira de alta qualidade com árvores pré-selecionadas. Também, mostrou-se uma estreita correlação entre o crescimento de diâmetro e a qualidade do sítio, pois a expansão máxima da copa depende da qualidade deste, indicando que ele deve ser considerado como fator limitante para o manejo do crescimento.

Charles River Water Quality Improvements Earns an A- for the Second Time in the Past Five Years

Science.gov (United States)

EPA has given the Charles River a grade of A- for bacterial water quality in the river during 2017. This is only the second time the river has earned a grade as high as an A-minus, and both have occurred within the past five years.

Costos económicos en la producción de servicios de salud: del costo de los insumos al costo de manejo de caso

OpenAIRE

ARREDONDO ARMANDO; DAMIÁN TERESA

1997-01-01

Objetivo. Generar información sobre los costos de producción de servicios de salud. Material y métodos. Siguiendo los criterios de Kessner se seleccionaron como trazadores: hipertensión, diabetes, diarreas y neumonías. Posteriormente, se definió el manejo de casos y, por medio de la metodología de costeo por manejo de caso, se definieron las funciones de producción, así como los insumos y costos unitarios requeridos para satisfacer la demanda de servicios médicos de cada enfermedad. Se proces...

Die ‘vergroening’ van die Christelike godsdiens: Charles Darwin, Pierre Teilhard de Chardin en Lloyd Geering

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Izak J.J. (Sakkie Spangenberg

2014-11-01

Full Text Available The greening of Christianity: Charles Darwin, Pierre Teilhard de Chardin and Lloyd Geering. Since the time of Charles Darwin, evolutionary biology challenged the metanarrative of Christianity which can be summarised as Fall-Redemption-Judgement. Pierre Teilhard de Chardin tried to circumvent these challenges by integrating the traditional Christian doctrines with evolutionary biology. However, he did not succeed since the Catholic Church, time and again, vetoed his theological publications. A number of Protestant theologians promoted his views but even they could not convince ordinary Christians to accept his views. These were too esoteric for Christians. Most of them were convinced that the acceptance of the theory of evolution will eventually undermine their faith. In recent years Lloyd Geering argued a case for the creation of a new narrative in which the Big Bang and the theory of evolution do play a role. He calls it the ‘Greening of Christianity’. This article discusses the metanarrative of Christianity and the challenges the theory of evolution presents before it assesses the views of Pierre Teilhard de Chardin and Lloyd Geering.

Gender Differences in Cognition in China and Reasons for Change over Time: Evidence from CHARLS.

Science.gov (United States)

Lei, Xiaoyan; Smith, James P; Sun, Xiaoting; Zhao, Yaohui

2014-12-01

In this paper, we model gender differences in cognitive ability in China using a new sample of middle-aged and older Chinese respondents. Modeled after the American Health and Retirement Survey (HRS), CHARLS respondents are 45 years and older and are nationally representative of the Chinese population in this age span. Our measures of cognition in CHARLS rely on two measures that proxy for different dimensions of adult cognition-episodic memory and intact mental status. We relate these cognitive measures to adult health and SES outcomes during the adult years. We find large cognitive differences to the detriment of women that were mitigated by large gender differences in education among these generations of Chinese people. These gender differences in cognition are especially concentrated in the older age groups and poorer communities within the sample. We also investigated historical, geographical, and cultural characteristics of communities to understand how they impact cognition. Economic development and environmental improvement such as having electricity, increases in wage per capita and green coverage ratio generally contribute to higher cognition ability. Women benefit more from the fruits of development -electricity and growth of green coverage ratio are conducive to lessening female disadvantage in cognition.

Educação integral: notas sobre Charles Fourier, Saint Simon e Pierre-Joseph Proudhon

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José Damiro Moraes

2015-11-01

Full Text Available Este artigo procura contribuir para as discussões em torno do conceito histórico de educação integral, tendo em vista que existem algumas lacunas em torno desse tema. Aqui iremos abordar os conceitos de educação integral no pensamento dos intelectuais: Claude-Henri de Rouvroy ou Conde de Saint-Simon (1760-1825, François Marie Charles Fourier (1772-1837 e Pierre-Joseph Proudhon (1809-1865. A pesquisa utiliza as obras dos autores escritas/publicadas no século XIX. A metodologia procura entender a produção intelectual de maneira dialética e dentro do contexto histórico em que foi produzida. Indicamos como conclusões que Proudhon, Saint-Simon e Charles Fourier, consideravam no processo educacional que a parte literária estaria diretamente vinculada com a científica, unindo teoria e prática. Podemos aventar que as contribuições desses pensadores foram importante nas reflexões educacionais e na defesa de uma educação comprometida com a transformação social presente no pensamento socialista e no movimento operário do século XIX e XX.

MANEJO DE PLAGAS EN LA PRODUCCIÓN DE HORTALIZAS ORGANICAS

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José L. García Hernández

2008-12-01

Full Text Available Los alimentos orgánicos son producidos mediante prácticas que promueven la fertilidad del suelo y la diversidad biológica, y excluyen todos aquellos productos químicos que se usan en la agricultura convencional. En regiones aisladas este tipo de producción no presenta serios inconvenientes, ya que el mismo sistema protege los cultivos de altos niveles de plagas y enfermedades. La demanda de alimentos orgánicos se ha incrementado desde hace dos décadas, por lo que producir en baja escala y en forma aislada no puede satisfacer los requerimientos del mercado. Esta demanda se ha convertido en una oportunidad de desarrollo importante en varios países. En superficies mayores tienden a aumentar las poblaciones de plagas y enfermedades, por lo que es necesario implementar actividades que ayuden al sistema a reducir dichas poblaciones. Este tipo de agricultura permite el control biológico, cultural, mecánico y físico, aunque su utilización la limitan los estándares y reglamentos señalados por las agencias certificadoras. Los productores deben determinar el manejo óptimo de plagas mediante estrategias que estén consideradas dentro del ambiente regulatorio del movimiento orgánico. Se presentan algunas alternativas adecuadas para implementar un programa de manejo, con un enfoque que considera la regulación actual para lograr y no poner en riesgo de pérdida, la certificación como productor orgánico.

78 FR 85 - In the Matter of: Emenike Charles Nwankwoala Currently Incarcerated at: Inmate Number 50756-037...

Science.gov (United States)

2013-01-02

... DEPARTMENT OF COMMERCE Bureau of Industry and Security In the Matter of: Emenike Charles... Order with the Under Secretary of Commerce for Industry and Security. The appeal must be filed within 45... first obtained a validated export license from the United States Department of Commerce, in violation of...

Veinte años de experiencia en el manejo de la mujer embarazada infectada por VIH/SIDA en el Instituto Nacional de Perinatología

OpenAIRE

Plazola-Camacho, Noemí Guadalupe; Ortiz-Ibarra, Federico Javier

2009-01-01

Introducción. Objetivos: revisar las recomendaciones internacionales e informar la experiencia que se tiene en el manejo y seguimiento de mujeres embarazadas infectadas por virus de inmunodeficiencia humana (VIH)/síndrome de inmunodeficiencia adquirida (SIDA) en el Instituto Nacional de Perinatología Isidro Espinosa de los Reyes (INPerIER). Métodos. Se presenta la experiencia clínica de 20 años (1988-2008) en el manejo de una cohorte de mujeres embarazadas infectadas por VIH atendidas en el I...

[Charles Robert Darwin: the great founder of scientific evolutionism].

Science.gov (United States)

Liang, Qian-Jin; Bin, Jie; Zhang, Gen-Fa

2009-12-01

Today, we celebrated 200 years since Charles Darwin, one of the world's most creative and influential thinkers, was born. And there happens to be the 150th anniversary of the publication of his famous book, On the Origin of Species. It is verified that On the Origin of Species is an immortal classic book and is still guiding the study of anagenesis in life science as the development of natural science from then on, and even though most of the ideas in the book are well-known at the present age. In the article, we recall the brilliance and predomination life of Darwin, a great sage with rich scientific achievements, review briefly the novel discoveries and theories after him in the field, and then elucidate the focal points and perspectiveas in near future study of evolution.

The doctor and the rebels--the diary of Charles Molteno Murray, recorded during the 1914 Boer rebellion.

Science.gov (United States)

Murray, R

2000-12-01

Just 12 years after the conclusion of the Anglo-Boer war, South Africa was led by ex-Boer Generals Botha and Smuts into what was to become the Great War, on the side of the British. This was utterly unacceptable to thousands of Boers who had engaged in a bitter struggle, against overwhelming odds, to prevent their country from becoming part of the mighty British Empire. Led by Generals de Wet, Beyers, and de la Rey, Lieutenant-Colonel Maritz and Major Kemp, they took up arms in a doomed rebellion, without proper weapons, equipment or organisation--by the time they were defeated the casualty figures for both sides exceeded those that would later result from the German South West campaign. Charles Molteno Murray, 37 years old, was a GP in Kenilworth, Cape Town, at the time. His father was an Irish immigrant doctor, his mother the daughter of the first Prime Minister of the Cape, Sir John Charles Molteno. In spite of having a busy and successful practice, with a surgical appointment at Victoria Hospital, Charles Murray volunteered for duty and soon found himself in the Orange Free State and northern Cape, caring for the wounded and dying of both sides in the rebellion. He kept a meticulous record of his experiences, written on loose-leaf pages sent as letters to his wife, which were later bound into leather-backed diaries. These diaries were passed on to his grandson, Dr Robert Murray, who had them transcribed into modern format. They contain details of daily life in the midst of military action, and also insights into important and little-publicised events of the Boer Rebellion of 1914.

The teacher taught? What Charles Darwin owed to John Lubbock

Science.gov (United States)

Pearn, Alison

2014-01-01

The period around the publication of John Lubbock's Origin of civilisation in 1870 and Charles Darwin's Descent of man and selection in relation to sex the following year is key to a re-evaluation of the relationship between the two men, usually characterized as that of pupil and master. It is in the making of Descent that Lubbock's role as a scientific collaborator is most easily discerned, a role best understood within the social and political context of the time. Lubbock made Darwin—both the man and his science—acceptable and respectable. Less obvious is Darwin's conscious cultivation of Lubbock's patronage in both his private and public life, and Lubbock's equally conscious bestowal, culminating in his role in Darwin's burial in Westminster Abbey.

Charles Richard de Beauregard and the treatment of blennorrhagic urethral stenosis in Madrid in the 18th century: Advertising, secrecy and deception.

Science.gov (United States)

Gómiz, J J; Galindo, I

2015-12-01

Describe the introduction of the treatment for blennorrhagic urethral stenosis in the city of Madrid in the 18th century by the French surgeon Charles de Beauregard, the formulations employed in the preparation of his personal «bougies», the advertising in the press, their marketing and distribution. Nonsystematic review of the Madrid newspaper Gaceta de Madrid y Diario curioso, erudito, económico y comercial (Madrid Gazette, curious, erudite, financial and commercial) between 1759 and 1790. Review of the medical literature of the 18th century preserved in the Fondo Antiguo of the Biblioteca Histórica of Universidad Complutense de Madrid (Historical Resource of the Historical Library of the Complutense University of Madrid). A Google search of «Charles Richard de Beauregard». Charles de Beauregard focused his professional work mainly on the treatment of the urethral sequela of blennorrhagia, phimosis and paraphimosis. He introduced to 18th century Spanish society (with purported originality and clear commercial interests) therapeutic methods based on lead acetate that had already been developed in France by Thomas Goulard. The urethral sequela of diseases such as blennorrhagic urethritis, stenotic phimosis and paraphimosis were highly prevalent in 18th century Madrid and required complex solutions for the practice of urology of that era. Charles de Beauregard introduced innovative but not original treatments that were invasive but not bloody and that provided him with fame and social prestige. He advertised his professional activity and marketed his therapeutic products through advertisements submitted to the daily press (Madrid Gazette, Gaceta de Madrid). Copyright © 2015 AEU. Publicado por Elsevier España, S.L.U. All rights reserved.

Charles IV 1978-2016. Reviewing the Ideological Background of the Exhibitions and Conferences in 1978

Czech Academy of Sciences Publication Activity Database

Benešovská, Klára

2017-01-01

Roč. 4, č. 1 (2017), s. 158-173 ISSN 2336-3452 R&D Projects: GA ČR GA13-39192S Institutional support: RVO:68378033 Keywords : Charles IV, King of Bohemia and Holy Roman Emperor * exhibitions in 2016 and 1978, Prague-Nuremberg-Cologne * art of the Luxembourg era 1350–1420 * historiography Subject RIV: AL - Art , Architecture, Cultural Heritage OBOR OECD: Art s, Art history

[Charles Ménière (1816-1887) : pharmacist and historian of the pharmacists who were in practice in the town of Angers].

Science.gov (United States)

Fournier, Josette

2017-03-01

Charles Ménière (1816-1887) was the young brother of the doctor Prosper Menière (1799-1862), who was the obstetrician of the Duchess of Berry, the doctor in chief of the deaf-mute Institution and an erudite ear specialist. Charles learned pharmacy in Paris. Coming back to Angers he bought a chemist’s shop. In 1871 he became the chief pharmacist of the Hôtel-Dieu. In 1857 he joined the Academic Society of Angers and presented many consequent papers between them one can find notes concerning the history of the Angers’s pharmacists. Its researches relate to pharmacology, mineralogy, hydrology and even philology.

RESULTADOS DEL MANEJO NUTRICIONAL EN UNA FAMILIA CON FENILCETONURIA, POSTERIOR AL DIAGNÓSTICO GENÉTICO: DISERTACIONES EN TORNO AL SEGUIMIENTO Y ADHERENCIA AL TRATAMIENTO.

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Marta L. Tamayo F.

2015-12-01

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Introducción: Aunque ciertamente la Fenilcetonuria (PKU no sea un desorden metabólico común en Colombia, médicos generales, pediatras y genetistas deben estar alerta de su presencia y, deben propender por un diagnóstico completo que permita iniciar un manejo nutricional adecuado temprano. De manera que no sólo es importante el diagnóstico, sino la asesoría genética apropiada, el manejo y seguimiento. Sólo de esta manera se logran minimizar las secuelas y en especial, el daño neurológico propio de esta alteración metabólica, dado que es una de las pocas patologías genéticas en la que es posible ofrecer algún tipo de manejo que evite daños devastadores y ofrezca así un mejor pronóstico. Es igualmente importante estar atentos a los procesos del sistema de salud colombiano, que impone trabas y demoras en los manejos y tratamientos de estas enfermedades poco frecuentes, pues son causa de baja adherencia, suspensión de tratamientos y empeoramiento clínico de nuestros pacientes, con deterioro irreversible muy negativo en estas familias afectadas vulnerables e indefensas.

Objetivo: En este trabajo se realizó seguimiento durante un año y medio de evolución bajo manejo nutricional a una familia colombiana con diagnóstico clínico, bioquímico y molecular de Fenilcetonuria (PKU.

Materiales y Métodos: A una familia colombiana con diagnóstico de Fenilcetonuria, con 4 individuos afectados, se le hizo el seguimiento clínico de su evolución durante un año y medio, mientras recibían el tratamiento consistente en el manejo nutricional adecuado para su enfermedad de base, la ingesta de preparados de fórmulas comerciales adecuadas y seguimiento de pruebas bioquímicas y de evolución clínica con o sin tratamiento.

Resultados: Se presentan los resultados de la evolución clínica bajo tratamiento con manejo nutricional adecuado durante un a