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A second-order semilinear Volterra integrodifferential equation involving fractional time derivatives is considered. We prove existence and uniqueness of mild solutions and classical solutions in appropriate spaces. | In this paper, we investigate the existence of mild solutions of second-order initial-values problems for a class of semilinear differential inclusions with nonlocal conditions. By using suitable fixed-point theorems for multi-valued maps, we study the case where the multi-valued map F has convex or nonconvex values. | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 36,309 |
SEPARATION PROBLEM FOR STURM-LIOUVILLE EQUATION WITH OPERATOR COEFFICIENT | Let H be a separable Hilbert Space. Denote by H1 = L2(a,b; H) the set of function defned on the interval a < c < b (¾¥ a < c < b £¥) whose values belong to H strongly measurable [12] and satisfying the condition If the inner product of function ¦(c) and g(c) belonging to H1 is defined by then H1 forms a separable Hilbe... | Complex geometric features in models would cause generation of redundant elements in finite element analysis.To reduce computation cost of complex models in the premise of acquirement of reliable analysis result,a method for assessing solution space discrepancy between the models before and after simplification is rese... | yue_Hant | 36,315 |
Quantum Dynamical Algebra SU(1,1) in One-Dimensional Exactly Solvable Potentials | We mainly explore the linear algebraic structure like SU(2) or SU(1,1) of the shift operators for some one-dimensional exactly solvable potentials in this paper. During such process, a set of method based on original diagonalizing technique is presented to construct those suitable operator elements, J0, J_\pm that sati... | In this paper, we study the Dirichlet problem for a singular Monge-Ampere type equation on unbounded domains. For a few special kinds of unbounded convex domains,we find the explicit formulas of the solutions to the problem. For general unbounded convex domain $\Om$, we prove the existence for solutions to the problem ... | eng_Latn | 36,317 |
A design study for an integer order bessel function of the first kind function generator for an analogue computer | The author suggests a method by which a function generator for an integer order Bessel function o f the first kind could be constructed, by making use o f a defining integral for these functions which involves the common trigonometric functions. | Given ?>0 andp?(0,1), we consider the following problem: findu such that $$\begin{gathered} - \Delta u + \lambda [u]_ + ^p = 0in\Omega , \hfill \\ u = 1on\partial \Omega , \hfill \\ \end{gathered} $$ whereΩ??2 is a smooth convex domain. We prove optimalH 1 andL ? error bounds for the standard continuous piecewise linea... | eng_Latn | 36,319 |
Dynamics of a Néel domain wall with a fine structure in rare-earth orthoferrites | The dynamics of an isolated domain wall (DW) with a fine structure moving at a supersonic velocity in a rare-earth orthoferrite is studied. A set of nonlinear equations of motion of the center of a DW structure line is derived. A steady-state solution to these equations adequately describes the experimental data for yt... | Abstract We study a general nonlinear elliptic equation in the Orlicz setting with data not belonging to the dual of the energy space. We provide several Lorentz-type and Morrey-type estimates for the gradients of solutions under various conditions on the data. | eng_Latn | 36,321 |
The Study on Mathematical Model for Double Porosity Medium with Well of Curves | In the oil production and thermal recovery in the application of oil and gas field, well of curves are regarded as the crooked canal(namely not only the canal has horizontal section but also vertical section), it instead the horizontal well before. Thus establishmented the new elbow well model, the solution of the mode... | We deal with linear parabolic (in the sense ::: of Petrovskii) systems of order $2b$ with discontinuous principal ::: coefficients. A priori estimates in Sobolev and ::: Sobolev--Morrey spaces are proved for the strong solutions by ::: means of potential analysis and boundedness of certain singular ::: integral operato... | eng_Latn | 36,325 |
Vibrational modes of two violins | Using electronic TV holography, as well as other methods for observing vibrational motion and sound radiation, the normal modes of vibration in two violins have been studied. The principal modes observed in a Hutchins violin showed fairly good agreement with those reported by Marshall [J. Acoust. Soc. Am. 77, 695–709 (... | We study the following bifurcation problem in a bounded domain in IR N : 8 : pu = juj jvj v + f(x; u; v; ) in qv = juj jvj u + g(x; u; v; ) in (u; v) 2 W 1;p 0 () W 1;q 0 () : We prove that the principal eigenvalue 1 of the following eigen- value problem 8 | eng_Latn | 36,344 |
Symmetry group methods for fundamental solutions | This paper uses Lie symmetry group methods to study PDEs of the form We show that when the drift function f is a solution of a family of Ricatti equations, then symmetry techniques can be used to find a fundamental solution. | Given ?>0 andp?(0,1), we consider the following problem: findu such that $$\begin{gathered} - \Delta u + \lambda [u]_ + ^p = 0in\Omega , \hfill \\ u = 1on\partial \Omega , \hfill \\ \end{gathered} $$ whereΩ??2 is a smooth convex domain. We prove optimalH 1 andL ? error bounds for the standard continuous piecewise linea... | eng_Latn | 36,345 |
Holomorphic isometries from the Poincar\'e disk into bounded symmetric domains of rank at least two | We first study holomorphic isometries from the Poincar\'e disk into the product of the unit disk and the complex unit $n$-ball for $n\ge 2$. On the other hand, we observe that there exists a holomorphic isometry from the product of the unit disk and the complex unit $n$-ball into any irreducible bounded symmetric domai... | In this paper, we establish the local well-posedness for a new coupled Camassa-Holm system in a range of the Besov spaces by employing a series of norm estimates. A wave-breaking mechanism for solutions is described in detail and a result of blow-up solutions with certain profile is established. | eng_Latn | 36,348 |
Renormalization group and variational treatments for a d-dimensional sine-Gordon model with correlated random fields | We study the effects of correlated symmetry-breaking-like random fields on critical properties of a d-dimensional sine-Gordon model. A Wilsonian renormalization group analysis shows an unusual scenario in the absence of stable fixed points. The physical nature of the related runaway in the parameter space is investigat... | Given ?>0 andp?(0,1), we consider the following problem: findu such that $$\begin{gathered} - \Delta u + \lambda [u]_ + ^p = 0in\Omega , \hfill \\ u = 1on\partial \Omega , \hfill \\ \end{gathered} $$ whereΩ??2 is a smooth convex domain. We prove optimalH 1 andL ? error bounds for the standard continuous piecewise linea... | eng_Latn | 36,359 |
Generalized Budan-Fourier theorem and virtual roots | In this Note we give a proof of a generalized version of the classical Budan-Fourier theorem, interpreting sign variations in the derivatives in terms of virtual roots. | We study the following bifurcation problem in a bounded domain in IR N : 8 : pu = juj jvj v + f(x; u; v; ) in qv = juj jvj u + g(x; u; v; ) in (u; v) 2 W 1;p 0 () W 1;q 0 () : We prove that the principal eigenvalue 1 of the following eigen- value problem 8 | eng_Latn | 36,361 |
On Singular Systems of Parabolic Functional Equations | We consider systems consisting of an initial-boundary value problem for second-order quasilinear parabolic equation and an initial value problem for first-order ordinary differential equation where both equations contain functional dependence on the unknown functions. | In this work, we study the existence and multiplicity of positive solutions for the higher order p-Laplacian boundary value problem with even derivatives | eng_Latn | 36,365 |
Boundary value problem for a parabolic-hyperbolic equation in a rectangular domain | In present paper we study a boundary value problem for a mixed parabolic-hyperbolic type equation in a rectangular domain and prove the existence of unique solution of this problem. In theory of boundary value problems for second order mixed type equations usually two conjugation conditions are in use. In this case, fo... | This study investigates the hydrodynamic performance of a submerged two layer horizontal plate breakwater. The plate thickness is considered as non-zero in the study. In the context of linear potential theory, an analytical solution for interaction of water waves with the plates is obtained using the matched eigenfunct... | eng_Latn | 36,370 |
Existence of positive weak solutions for a new class of Kirchhoff elliptic systems with multiple parameters | In this paper, using sub-supersolution method, we study the existence of weak positive solution for a new class of Kirchhoff elliptic systems in bounded domains with multiple parameters. | In this paper,the design for eigenstructure assignment is discussed.The Linear Design Method for minimal order E-compensator is given,in which the attached P polse can be assigned in a stable(fixed,arbitrary)position.The uniformity of eigenstructure assignment capability for EO-compensator,E-compensator and state feedb... | eng_Latn | 36,373 |
A singular Monge-Ampère equation on unbounded domains | In this paper, we study the Dirichlet problem for a singular Monge-Ampere type equation on unbounded domains. For a few special kinds of unbounded convex domains,we find the explicit formulas of the solutions to the problem. For general unbounded convex domain $\Om$, we prove the existence for solutions to the problem ... | We describe preliminary results from an effort to quantify the uncertainties in parton distribution functions and the resulting uncertainties in predicted physical quantities. The production cross section of the $W$ boson is given as a first example. Constraints due to the full data sets of the CTEQ global analysis are... | eng_Latn | 36,375 |
Pressure projection stabilizations for Galerkin approximations of Stokes' and Darcy's problem | In this study, we consider some recent stabilization techniques for the Stokes' problem and show that they are instances of the framework proposed by Brezzi and Fortin in "A minimal stabilisation procedure for mixed finite element methods" (Numer Math 89, (2001) 457). We also propose an analysis for Taylor-Hood element... | We describe preliminary results from an effort to quantify the uncertainties in parton distribution functions and the resulting uncertainties in predicted physical quantities. The production cross section of the $W$ boson is given as a first example. Constraints due to the full data sets of the CTEQ global analysis are... | eng_Latn | 36,401 |
Existence of Non-negative Solutions of Nonlinear Third order Eigenvalue Problems | The authors consider the nonlinear third order differential equationsu+ρ~3u=λg(t)f(u),\ 0t2π(B)with the periodic boundary conditionsu~((i))(0)=u~((i))(2π),\ i=0,1,2(E)Where ρ∈0,13 is a constant,λ0 is a parameter.Two results on the existence of non-negative solutions to problem(B)-(E) are obtained.And the proof uses th... | In this paper, we study the qualitative behavior of following open-access anchovy fishery model: c x p y y y x d ax x v n n n n v n b n n , where , , , , , , , p v d c b a and the initial conditions 0 0 , y x are positive real numbers. More precisely, we investigate the necessary and sufficient conditio... | eng_Latn | 36,409 |
Oligopolistic Entry Deterrence under Incomplete Information | Recent work has investigated the effects of asymmetric information between an incumbent firm and a potential entrant. This study extends the analysis to allow the initial market structure to be a noncooperative oligopoly. We show that there is a Bayesian Nash equilibrium in which the incumbent firms, although unable to... | Given ?>0 andp?(0,1), we consider the following problem: findu such that $$\begin{gathered} - \Delta u + \lambda [u]_ + ^p = 0in\Omega , \hfill \\ u = 1on\partial \Omega , \hfill \\ \end{gathered} $$ whereΩ??2 is a smooth convex domain. We prove optimalH 1 andL ? error bounds for the standard continuous piecewise linea... | eng_Latn | 36,420 |
Mixed quasi-equilibrium-like problems | We use the auxiliary principle technique in conjunction with the Bregman function to suggest and analyze a three-step predictor-corrector method for solving mixed quasi-equilibrium-like problems. We also study the convergence criteria of this new method under some mild conditions. As special cases, we obtain various ne... | We prove existence of solutions for a class of systems of subelliptic PDEs arising from Mean Field Game systems with H\"ormander diffusion. These results are motivated by the feedback synthesis Mean Field Game solutions and the Nash equilibria of a large class of $N$-player differential games. | eng_Latn | 36,423 |
Robust exponential stability of uncertain systems with time-varying delays | Focuses on the problem of robust exponential stability of a class of uncertain systems described by functional differential equations with time-varying delays. The uncertainties are assumed to be continuous time-varying, nonlinear, and norm bounded. Sufficient conditions for robust exponential stability are given for b... | In this paper we will study the existence of solutions for the nonhomogeneous elliptic equation with variable exponent $\Delta^2_{p(x)} u=\lambda V(x) |u|^{q(x)-2} u$, in a smooth bounded domain,under Neumann boundary conditions, where $\lambda$ is a positive real number, $p,q: \overline{\Omega} \rightarrow \mathbb{R}$... | eng_Latn | 36,426 |
CANONICAL FORMULATION OF A BOSONIC MATTER FIELD IN (1 + 1)-DIMENSIONAL CURVED SPACE | We study a bosonic scalar in (1 + 1)-dimensional curved space that is coupled to a dynamical metric field. This metric, along with the affine connection, also appears in the Einstein–Hilbert action when written in first-order form. After applying the Dirac constraint formalism to the Einstein–Hilbert action and the act... | In this paper, we study the Dirichlet problem for a singular Monge-Ampere type equation on unbounded domains. For a few special kinds of unbounded convex domains,we find the explicit formulas of the solutions to the problem. For general unbounded convex domain $\Om$, we prove the existence for solutions to the problem ... | yue_Hant | 36,441 |
On Best Polynomial Approximations in L2 | For the τ-moduli of smoothness of mth order, we calculate exact constants in Jackson-type inequalities. We also obtain the exact values of the n-widths of classes of functions whose rth derivatives are characterized by τ-moduli of smoothness majorized by functions satisfying certain constraints. We present an example o... | In this work, we study the existence and multiplicity of positive solutions for the higher order p-Laplacian boundary value problem with even derivatives | eng_Latn | 36,445 |
Necessary Conditions of Weak Efficiency for a Class of Nondifferentiable Vector Optimization Problems | the Kuhn-Tucker type necessary conditions for weak efficiency are given for a class of the problem of minimizing a vector function of which each component is the sum of a differentiable function and a convex function subject to a set of differentiable nonlinear inequalities on an open subset X of R~n,under the weaker c... | In this paper, we study the sharp energy criteria of blow-up and global existence for the nonlinear Klein-Gordon equation by the sharp Gagliardo-Nirebergy-Sobolev inequality. | eng_Latn | 36,449 |
Positivity and strong ellipticity | We consider second-order partial differential operators $H$ in divergence form on $\Ri^d$ with a positive-semidefinite, symmetric, matrix $C$ of real $L_\infty$-coefficients and establish that $H$ is strongly elliptic if and only if the associated semigroup kernel satisfies local lower bounds, or, if and only if the ke... | In this work, we study the existence and multiplicity of positive solutions for the higher order p-Laplacian boundary value problem with even derivatives | eng_Latn | 36,454 |
Existence of nonzero weak solutions for a class of elliptic variational inclusions systems in R N | We consider the following variational inclusions system of the form −� u + u ∈ ∂1 F(u ,v ) in R N , −� v + v ∈ ∂2 F(u ,v ) in R N , | In this article we study the waves equation on an high-tension pillars with alveolar form. Geometric, high-tension pillars are represented by a thin, tall structure where the edge base is denoted by e, the thickness of the material - distributed along the layers is denoted by and the alveoli is distributed with the p... | eng_Latn | 36,466 |
On the third-body perturbations of high-altitude orbits | The long-term effects of a distant third-body on a massless satellite that is orbiting an oblate body are studied for a high order expansion of the third-body disturbing function. This high order may be required, for instance, for Earth artificial satellites in the so-called MEO region. After filtering analytically the... | In present paper we study a boundary value problem for a mixed parabolic-hyperbolic type equation in a rectangular domain and prove the existence of unique solution of this problem. In theory of boundary value problems for second order mixed type equations usually two conjugation conditions are in use. In this case, fo... | eng_Latn | 36,472 |
Hepp's bound for Feynman graphs and matroids | We study a rational matroid invariant, obtained as the tropicalization of the Feynman period integral. It equals the volume of the polar of the matroid polytope and we give efficient formulas for its computation. This invariant is proven to respect all known identities of Feynman integrals for graphs. We observe a stro... | Given ?>0 andp?(0,1), we consider the following problem: findu such that $$\begin{gathered} - \Delta u + \lambda [u]_ + ^p = 0in\Omega , \hfill \\ u = 1on\partial \Omega , \hfill \\ \end{gathered} $$ whereΩ??2 is a smooth convex domain. We prove optimalH 1 andL ? error bounds for the standard continuous piecewise linea... | eng_Latn | 36,474 |
Pohozaev identity for p-harmonic equation | This paper demonstrates the Pohozaev identity for p-harmonic equation from which the nonexistence of nontrivial solution for p-harmonic equation with critical growth is obtained. | Function theoretic methods in the complex plane are used to develop simple parametric hodograph formulas that generate sharp boundary equilibria of arbitrary shape. The related method of Gorenflo [Z. Angew. Math. Phys. 16, 279 (1965)] and Merkel (Ph.D. thesis, University of Munich, 1965) is discussed. A numerical techn... | eng_Latn | 36,476 |
Two-parameter nonresonance condition for the existence of fourth-order boundary value problems | Abstract In this paper, we discuss the existence of the fourth-order boundary value problem { u ( 4 ) = f ( t , u , u ″ ) , 0 t 1 , u ( 0 ) = u ( 1 ) = u ″ ( 0 ) = u ″ ( 1 ) = 0 , where f : [ 0 , 1 ] × R × R → R is continuous, and partly solve the Del Pino and Manasevich's conjecture on the nonresonance condition invol... | Abstract: We study the pointwise behavior of the Fourier transform of the spectral measure for discrete one-dimensional Schrödinger operators with sparse potentials. We find a resonance structure which admits a physical interpretation in terms of a simple quasiclassical model. We also present an improved version of kno... | eng_Latn | 36,477 |
Gradient estimates for problems with Orlicz growth | Abstract We study a general nonlinear elliptic equation in the Orlicz setting with data not belonging to the dual of the energy space. We provide several Lorentz-type and Morrey-type estimates for the gradients of solutions under various conditions on the data. | In this paper we discuss the approximations introduced in the average-ion model usually employed for level population calculations. An improved system of equations of higher-order approximation is given. It is proved that in electric dipole approximation the level population probability Pnlj is independent of the quant... | eng_Latn | 36,489 |
Assessing Mathematical Forms employed to Describe Evolutions of Perturbations Propagating inside Optical Fibers | Comparisons have been made with different mathematical forms used to represent perturbation fields in studying the modulation instability happened in optical fibers. Without an artificial constraint, self consistent solutions to the linearized nonlinear Schrodinger equation can be deduced, which has recovered a rich va... | Given ?>0 andp?(0,1), we consider the following problem: findu such that $$\begin{gathered} - \Delta u + \lambda [u]_ + ^p = 0in\Omega , \hfill \\ u = 1on\partial \Omega , \hfill \\ \end{gathered} $$ whereΩ??2 is a smooth convex domain. We prove optimalH 1 andL ? error bounds for the standard continuous piecewise linea... | eng_Latn | 36,490 |
The lattice of Fitting classes which are right extensible by soluble groups | In this paper we study the set of Fitting classes which are right extensible by soluble groups ordered by the inclusion relation. The consideration of the associated lattices gives rise to new Fitting classes and it allows to obtain some injectivity criteria for general Fitting classes. | Given ?>0 andp?(0,1), we consider the following problem: findu such that $$\begin{gathered} - \Delta u + \lambda [u]_ + ^p = 0in\Omega , \hfill \\ u = 1on\partial \Omega , \hfill \\ \end{gathered} $$ whereΩ??2 is a smooth convex domain. We prove optimalH 1 andL ? error bounds for the standard continuous piecewise linea... | eng_Latn | 36,505 |
Coupled Oscillators in Quenched Random Potential | We study a synchronization of coupled oscillators in quenched random potential by numerical simulations as a model of sliding charge density waves and flux line lattices. By changing external driving force, we find a percolation transition of a cluster with a same frequency in a finite time observation. Percolating clu... | ABSTRACTThis paper aims to develop, assess, and numerically implement analytical models for the newly introduced Quintuple Friction Pendulum Isolator (QFPI) which can identically capture its real e... | eng_Latn | 36,567 |
V.A. Marchenko and E.Y. Khruslov: Homogenization of Partial Differential Equations | This book, which was first published in Russian in 2005, deals with the homogenization of partial differential equations (pdes) of elliptic and parabolic types. The authors study both boundary value problems posed in highly perforated domains or equations with rapidly oscillating coefficients. The standard theory of ho... | Abstract The high frequency modes of Hamiltonian systems tend to have small amplitudes. Hence for moderately accurate integration of such problems by, say, the leapfrog method the time step tends to be limited by stability restrictions rather than accuracy restrictions. Conventional implicit symplectic methods like imp... | eng_Latn | 36,568 |
Relaxation oscillations in a kinetic model of catalytic hydrogen oxidation involving a chase on canards | Abstract A detailed study of two- and three-variable mathematical models of a heterogeneous catalytic system is presented with special attention to weakly stable dynamics, a type of complex irregular behavior frequently encountered in oscillating chemical reactions. One of the most important properties of the weakly st... | With the FEM analysis soft ware NX Nastran,this paper achieves the buckling response analysis according to various structural dimension、work speed、disturbing force on the HSK tool system.The computing results and correlative conclusions can be regarded as the basis of structure stability and failure mechanism analysis,... | eng_Latn | 36,579 |
Features of the Triple Helix Model in Cross-Border Clusters | The article is aimed at discussing the unique characteristics of the “triple helix” model that are unveiled while applied to cross - border cluster studies. The results of the case study method of the best practice on cross - border cluster formation at the Baltic Sea region shows evidence of the doubling of the number... | In this lecture we present an overview of some recent results on temporal and spatial structures in chemical systems far from equilibrium. We discuss experiments on multiple stationary states (bi- and tristabilities), hysteresis of unstable stationary states, limit cycles, generation of limit cycles by periodic externa... | eng_Latn | 36,583 |
Bus Routes Optimization and Adjustment Based on the Optimal Service Capability of Urban Bus Stop | A large number of urban bus routes and bus stops are clustered in the central business area, which provides the mobility for the city residents but brings about traffic-related problems at the same time. For example, one of the common phenomena is that many buses are seriously delayed at the bus stop, particularly in t... | In this paper the dynamics of a discrete-time prey-predator system is investigated in the closed first quadrant . The existence and stability of fixed points are analyzed algebraically .The conditions of existence for flip bifurcation is derived by busing center manifold theorem and bifurcation theory. Numerical simula... | eng_Latn | 36,606 |
Global Dynamics of a Piecewise Smooth System for Brain Lactate Metabolism | In this article, we study a piecewise smooth dynamical system inspired by a previous reduced system modeling compartimentalized brain metabolism. The piecewise system allows the introduction of an autoregulation induced by a feedback of the extracellular or capillary Lactate concentrations on the Capillary Blood Flow. ... | W 'J *J J LBL-9998 I B Lawrence Berkeley Laboratory UNIVERSITY OF CALIFORNIA Materials & Molecular Research Division D O C U M E N T S SECTION. THE LOOP-DRIVEN GRAPHICAL UNITARY GROUP APPROACH TO THE ELECTRON CORRELATION PROBLEM, INCLUDING CONFIGURATION INTERACTION ENERGY GRADIENTS Bernard Robinson Brooks ( Ph. D. thes... | eng_Latn | 36,619 |
Adiabatic calorimeter as an ultra-low frequency spectrometer | High themdl stability and temperature resolution of the adiabatic calorimetry mke it possible to study freezing process of disorder existing in coladensed mtters. liquids around their glass transition regions. It turned out that the enthalpy relaxatim phenanenon occurreed also in crystalline materials associated with t... | This paper considers a transient heat conduction problem for an infinite medium with two non-overlapping circular cavities. Suddenly applied, steady Dirichlet type boundary conditions are assumed. The approach is based on superposition and the use of the general solution to the problem of a single cavity. Application o... | eng_Latn | 36,634 |
Film condensation heat transfer on a horizontal tube in presence of a noncondensable gas | The double boundary layer model has been developed to study the behavior of film condensation heat transfer outside a horizontal tube in presence of air treated as a noncondensable gas. And the coupled heat and mass transfer on a smooth horizontal tube is numerically solved with the finite difference method. The local ... | The time sequences of the molecular dynamics simulation for the folding process of a protein is analyzed with the inherent structure landscape which focuses on configurational dynamics of the system. Time dependent energy and entropy for inherent structures are introduced and from these quantities a conformational temp... | eng_Latn | 36,635 |
Pattern dynamics in inhomogeneous active media | We study pattern dynamics in inhomogeneous active media described by a reaction–diffusion model. This is done by means of numerical simulations in one-, two- and three-dimensional systems with radial symmetry. We consider inhomogeneities corresponding to the space variation of the (nonlinear) reaction characteristic of... | Summary: A medium containing propamidine is described which has high selective activity for the species Bacillus anthracis. The spore form of the organism is essential as inoculum for the medium. | eng_Latn | 36,643 |
Reactive catalytic fast pyrolysis process and system | This invention is directed to the discovery of a reactive catalytic fast pyrolysis (RCFP) process utilizing hydrogen at low pressures. | Abstract We study the dynamics of a wrinkled flame held downstream of a cold, isothermal, flat burner The analysis is conducted in the framework of a thermal diffusional flame model. An Arrhenius rate with a large activation temperature and a single reactant with Lewis number unity are postulated We show that the nonli... | eng_Latn | 36,680 |
Multigrid and preconditioning strategies for implicit PDE solvers for degenerate parabolic equations | The novel contribution of this paper relies in the proposal of a fully implicit numerical method designed for nonlinear degenerate parabolic equations, in its convergence/stability analysis, and in the study of the related computational cost. In fact, due to the nonlinear nature of the underlying mathematical model, th... | The complex dynamics of an autonomous prey-predator system with impulsive state feedback control is studied. The sufficient conditions for the existence and stability of semi-trivial are obtained by using the Poincare map. Numerical simulations show that the complex dynamics of system we considered, including the doubl... | eng_Latn | 36,695 |
Conjugate Heat Transport Systems | In this chapter, we further employ the law of motive force, a physical principle, to a class of more complicated situation of conductive–convective conjugate heat transfer problems. We provide a complete analytical solution for a classically unsolved problem of generalized Pohlhausen’s solution of forced convection wit... | . Such inverse problems arise in the study ofheat and mass transfer, diffusion, tracer dispersion, etc.Among the works concerning such problems, we notethose by Yu.E. Anikonov, Yu.Ya. Belov, M. Ivanchov,and some other authors (see the bibliography in [1–5]).However, previous studies considered linear or the sim-plest q... | yue_Hant | 36,698 |
A speculative study of non-linear Arrhenius plot by using fractional calculus | In this study, the Van't Hoff differential equation is taken under consideration by making use of fractional derivative tools. In this context, the nonlinear Arrhenius behaviour can be obtained and some experimental values of reaction rate as function of temperature were fitted, with the proposed model. The new model s... | The gracefulness of graph R(4,5,n) are discussed.The graceful labelings are given.It also proves that graph R(4,5,n) are alternating graph. | eng_Latn | 36,711 |
Vibration isolation system using zero-power magnetic suspension is modified to be equipped with a weight support mechanism. The original system has a problem that the whole weight of the isolation table must be supported solely by the attractive force produced by permanent magnets. It is an obstacle to develop large is... | This paper presents a six-axis hybrid vibration isolation system by an active zero-power control in combination with a passive weight support mechanism in order to develop a large vibration isolation table. The use of active zero-power control and weight support mechanism is the salient feature of the proposed system w... | This paper presents a six-axis hybrid vibration isolation system by an active zero-power control in combination with a passive weight support mechanism in order to develop a large vibration isolation table. The use of active zero-power control and weight support mechanism is the salient feature of the proposed system w... | eng_Latn | 36,748 |
Experimental and numerical study on an ultrasonic horn with shape designed with an optimization algorithm | A New Approach on Vibrating Horns Design | Three-dimensional vortex structures under breaking waves | eng_Latn | 36,760 |
Flutter-critical velocity is usually estimated from deterministic analyses by assuming that physical and geometrical parameters are perfectly known. However, aleatory and epistemic uncertainties, especially those associated with the definition of material properties, are intrinsically present partly because of the rand... | In this study, flutter uncertainty analysis of an aircraft wing subjected to a thrust force is investigated using fuzzy method. The linear wing model contains bending and torsional flexibility and ... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 36,768 |
This study concentrates to an effect usually called quasi-periodic response. Double degree of freedom (DDOF) spherical pendulum as an auto-parametric system is used to demonstrate and investigate this effect. Sweeping the excitation frequency throughout the auto-parametric resonance interval, various types of quasi-per... | The paper presents the results of numerical investigations of the overhead travelling cranes load motion. The model studies assumes that the load is suspended on the inextensible rope. Conversely, its motion is triggered by an external moment. In addition, energy losses in the construction node connecting the rope to t... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 36,787 |
Cylindrical shells under partially distributed radial loading | The elastic solution to the fundamental problem of a cylindrical shell subjected to a symmetric, partially distributed, and self-balanced radial pressure loading acting on the external surface is obtained under plane strain condition. A dual series approach based on Airy`s stress functions is employed yielding an exact... | A general performance comparison of fuel element configurations having cell dimensions compatible with the OMRE grid structure was conducted. Resuits show that plates and rods are almost equivalent, and both are superior to concentric rings in nuclear and thermal performance (J.R.D.) | eng_Latn | 36,809 |
Free Vibration of Thin Circular Plates Resting on an Elastic Foundation with a Variable Modulus | AbstractAn exact solution is established pertaining to the problem of undamped free vibration of a thin circular plate resting on a Winkler foundation with variable subgrade modulus. The solution is performed by applying the infinite power series method. Moreover, the solution procedure is demonstrated through an illus... | We study the initial boundary value problem for the nonlinear viscoelastic wave equation with strong damping term and dispersive term. By introducing a family of potential wells we not only obtain the invariant sets, but also prove the existence and nonexistence of global weak solution under some conditions with low in... | eng_Latn | 36,810 |
L 2 regularity of measurable solutions of a finite-difference equation of the circle | We show that if $\varphi$ is a lacunary Fourier series and the equation $\psi (x) -\psi (x + \alpha) = \varphi(x), x \bmod 1$ has a measurable solution $\varphi$, then in fact the equation has a solution in L2. ::: ::: This work of Michel Herman (1942-2000) appeared only as a preprint of the Mathematics Institute, Univ... | The main objective of this study is to evaluate ball bearing defects under different operation conditions through vibration measurements. There are several tests conducted for healthy and defective bearing under variable speeds and load conditions. Experimental tests are conducted for six sets of ball bearings. Initial... | eng_Latn | 36,813 |
Analyses of flexural-torsional buckling of rolling H-section steel mono-overhanging beam | A study on flexural-torsional buckling of rolling H-section Steel mono-overhanging beam under uniform load is carried out.It assumes that when the control section of mono-overhanging Beam under uniform load is on the simply supported part,it can be simplified as a simply supported beam under uniform load and a concentr... | Through the check and estimate about some hyperbolic humpback bridges along main highways in Hunan Province,the article introduces the main flaws of hyperbolic humpback bridges,and the reasons that cause them,then addresses some practicable measures of reinforcement reconstruction. | eng_Latn | 36,816 |
The electrostatic potential of an infinite array of rectangular cylinders | Electrostatically charged cylinders are useful in precipitators, filters, transmission lines, and optical devices. Studies of infinite arrays of such cylinders are helpful as the limiting cases of the finite arrays. The method of field matching has been applied with success to square cylinders and is extended in this s... | In this paper, we study the polynomial stabilization for a system of magnetoelastic plates. Linear and nonlinear models are considered. The polynomial stability is obtained by means of a new multiplier given by a first-order hyperbolic problem. | eng_Latn | 36,821 |
Improved Zero-crossing Method for Power System Frequency Estimation* | Fast and accurate frequency estimation is crucial for power system control, protection and monitoring. This paper proposed an improved zero-crossing method based on weighted multi-level set for frequency estimation with one and half cycle. The proposed method first uses multi-level set, i.e., different thresholds to ca... | This paper deals with the study of free transverse vibrations of rectangular plates with an internal line hinge and elastically restrained boundaries. The equations of motion and its associated boundary and transition conditions are rigorously derived using Hamilton’s principle. The governing eigenvalue equation is sol... | eng_Latn | 36,828 |
Study on vibration control of cables with elastic end restraint(II):Experimental verification | The experimental research is conducted to study the axial passive control of cable vibration by setting an elastic end restraint at one support of the cable in the axial direction.The influence of support motion on the natural frequency of cable vibration is presented.Then the damping effect of elastic restraint is ver... | Abstract Wind is one of the fastest-growing renewable sources of electricity. As with most renewables, the economic viability relies on public subsidies. Even among renewables, the economic evaluation of wind projects is particularly challenging due to the unpredictability of the energy source, wind, and the high sensi... | eng_Latn | 36,829 |
An equations of motion approach for open shell systems | A straightforward scheme is developed for extending the equations of motion formalism to systems with simple open shell ground states. Equations for open shell random phase approximation (RPA) are given for the cases of one electron outside of a closed shell in a nondegenerate molecular orbital and for the triplet grou... | Abstract: Road profile and the technical condition of the suspension affect a large measure of comfort, road safety and endurance. This paper contains the theoretical study results of the offroad vehicle vibration when running on a bumpy section of road. For this purpose has been developed mechanical model of tire-susp... | eng_Latn | 36,838 |
Ride performance analysis of half-car model for semi-active system using RMS as performance criteria | The work aims to study the root mean square (RMS) responses to acceleration input for four state variables: the ms vertical acceleration, the ms pitch angular acceleration and the front and rear deflections of the suspensions. A half-car two degree-of-freedom model of semi-active control scheme is analyzed and compared... | The method for equivalent static wind loads applicable to multi-responses is proposed in this paper. A modified load-response-correlation (LRC) method corresponding to a particular peak response is presented, and the similarity algorithm implemented to the group response is described. The main idea of the algorithm is ... | eng_Latn | 36,846 |
Improved reflectivity of platinum/carbon multilayers for X-ray mirrors by carbon doping into platinum layer | Abstract We present a study of improving the X-ray reflectivity of platinum/carbon multilayers for X-ray mirrors. The X-ray reflectivity of the multilayers depends entirely on the interface quality. Here we show that carbon doping into the platinum layer limits crystallization during deposition and thus reduces the int... | Abstract This research is focused on the effects of nonlinear terms on the dynamical behavior of graphene reinforced laminated composite plates. Firstly, the governing equations of the graphene reinforced composite thin plate subjected to transverse excitations are derived by using the Hamilton's principle and the von ... | eng_Latn | 36,847 |
Proteins at surfaces studied with the surface force technique | Some results obtained by using the interferometric surface force technique for studying the interactions between adsorbed protein layers and between such layers and surfaces are presented. We have ... | Based on the classical theory of thin plate and Biot theory, a precise model of the transverse vibrations of a thin rectangular porous plate is proposed. The first order differential equations of the porous plate are derived in the frequency domain. By considering the coupling effect between the solid phase and the flu... | eng_Latn | 36,849 |
Joint And Muscle Forces During Clenching | The masticatory system is highly redundant. Therefore, complete knowledge about the activation patterns of the chewing muscles belonging to a specific resultant bite force can only be gained either by simultaneous force- and EMG-measurement or with the help of optimization strategies. In this study, such EMG and force ... | This paper computed No.17 coupler yoke' stress intensity factors based on 1/4 displacement method of finite element method,calculated the crack propagation life of No.17 coupler yoke using Paris formula based on AAR spectrum,and given analysis and evaluation for the result. | eng_Latn | 36,868 |
Potential of Finite Element Analysis for Cephalometric Investigation | In view of concerns relating to the validity of traditional cephalometric appraisals, we undertook this study to use a potentially powerful method, finite element analysis, to compare cephalometric changes between two samples (subjects with and without orthodontic treatment). The derived data show varying sample contra... | ABSTRACTThis paper aims to develop, assess, and numerically implement analytical models for the newly introduced Quintuple Friction Pendulum Isolator (QFPI) which can identically capture its real e... | eng_Latn | 36,872 |
Polynomial stabilization of magnetoelastic plates | In this paper, we study the polynomial stabilization for a system of magnetoelastic plates. Linear and nonlinear models are considered. The polynomial stability is obtained by means of a new multiplier given by a first-order hyperbolic problem. | Morphological changes of ultrahigh-molecular-weight polyethylene reactor powders were studied using scanning electron microscopy after their compaction and monolith production. The optimum conditions (pressure and temperature) for the compaction and monolith production of the reactor powders were determined. | eng_Latn | 36,884 |
Resonant vibrations of free cylinders and disks | A complete solution is obtained for nonaxisymmetric resonant vibrations of a free cylinder or disk involving infinite sums. For axisymmetric longitudinal vibrations an alternative to previous solutions is included. In principle, the solutions satisfy exactly the stress‐free boundary conditions , in contrast to the appr... | SUMMARY ::: ::: In this paper six distribution-free (nonparametric) stereological methods for the solution of Wicksell's corpuscle problem—i.e. the determination of the distribution of diameters of spheres embedded in an opaque specimen from the diameters of their profiles on plane sections—are compared as regards thei... | eng_Latn | 36,886 |
Coupled instabilities for a thick elastic plate under thrust | For a thick incompressible hyperelastic plate under biaxial thrust, flexural and constitutive (homogeneous) instabilities are considered. In the present study their interaction (coupling) is discussed, when the critical conditions coincide for both kinds of instabilities. With the help of branching theory, especially t... | This paper computed No.17 coupler yoke' stress intensity factors based on 1/4 displacement method of finite element method,calculated the crack propagation life of No.17 coupler yoke using Paris formula based on AAR spectrum,and given analysis and evaluation for the result. | eng_Latn | 36,887 |
Approximate Green's functions and a boundary element method for electro-elastic analyses of active materials | Abstract A boundary element method (BEM) for the analysis of two-dimensional, time independent problems of linear electro-elasticity is presented. Emphasis is given to the derivation of representation formulas and fundamental solutions as well as to the construction of an efficient numerical algorithm. The method is pa... | In this paper verification methods for Fredholm integral equations are considered. By these methods the numerical approximation is computed together with mathematically guaranteed error bounds of high quality. The foundations for such numerics is described and then applied to Fredholm integral equations. We conclude by... | eng_Latn | 36,888 |
A study on free vibration of a ring-stiffened thin circular cylindrical shell with arbitrary boundary conditions | The vibration of ring-stiffened cylinders associated with arbitrary boundary conditions is investigated. Displacements of cylinders can be easily described by trigonometric functions when the cylinders are shear diaphragms supported at both ends. As to other boundary conditions, exponential functions are used and axial... | Abstract Degenerate Rayleigh-Schrodinger perturbation theory is treated by expansions in unperturbed eigenfunctions. The results of seventh order perturbation are presented for the cases in which the degeneracy can be totally removed in the first and second orders. | eng_Latn | 36,908 |
A computation of the frequency dependent dielectric function for energetic materials | A theory of excitation of a solid system by a shock is developed and is implemented using first order time-dependent perturbation theory. This allows one to study excitation by both the longitudinal fields generated in a shock and also the transverse radiation field from the accelerating atoms. This is argued to be the... | Abstract This research is focused on the effects of nonlinear terms on the dynamical behavior of graphene reinforced laminated composite plates. Firstly, the governing equations of the graphene reinforced composite thin plate subjected to transverse excitations are derived by using the Hamilton's principle and the von ... | eng_Latn | 36,912 |
Development of Vibration Isolation Mounts of a Vehicle Using Static and Dynamic Analysis | Abstract In automotive industry, rubber mounts are widely used to cushion the loads and isolate vibration in passenger vehicle compartments. In this study an engine rubber mount and strut bushing are analysed. The static and dynamic characteristics of the rubber specimen as well as the viscoelastic and hyperelastic pro... | Discontinuous solutions or interfaces are common in nature, for examples, shock waves or material interfaces. However, their numerical computation is difficult by the feature of discontinuities. In this paper, we summarize the numerical approaches for discontinuities and interfaces appearing mostly in the system of hyp... | eng_Latn | 36,924 |
L'anneau $$\mathbb{Z} [\sqrt {14} ]$$ et l'algorithme Euclidien | The aim of this note is to study the ring\(\mathbb{Z} [\sqrt {14} ]\) and in particular the question whether it is Euclidean or not. The following results are obtained: ::: ::: 1) ::: ::: The couples of elements of\(\mathbb{Z} [\sqrt {14} ]\) which are not Euclidean with respect to the absolute value of the norm are de... | There are several formulations for the beam element in the large deformation and displacement problem. Recently, Absolute Nodal Coordinate Formulation (ANCF) is studied for such problems. In this formulation, the mass matrix and the stiffness matrix are described as simple equations, even in the case of the large defor... | fra_Latn | 36,927 |
Vibration of a Free Gyroscope on a Non-Uniform Elastic Shaft | This paper is a sequel to a previous work in which the vibrations were considered of a gyroscope mounted on a uniform elastic shaft within two rigid gimbals. The theory has now been extended to include a more general practical arrangement in which the shaft is non-uniform. Experimental results have also been obtained w... | Abstract This paper presents the results of experimental study of gas turbine rotor of Air craft, Marine, wind turbine rotor etc. The natural frequency of gas turbine rotor using Holzer’s method same are compared with the results that are obtained through a well known software based approach of FFT Analyzer. Rotors emp... | eng_Latn | 36,933 |
Experimental study on dynamic characteristics of a high-speed rolling ball bearing support system with rubber rings | The study presented in this paper experimentally studied the dynamic characteristics of the high-speed rolling ball bearing support system with rubber rings in the filament winding head of rotating machinery. First, a test-bed was established. Then, the amplitude-frequency relationship of the support system with three ... | In this article, we derive error estimates for the Galerkin approximation of a general linear second order hyperbolic equation. The results can be applied to a variety of cases, for example, vibrating systems of linked elastic bodies. The results generalize the work of Baker [1] and also allow for viscous type damping.... | eng_Latn | 36,941 |
Equations of Motion Formulation of a Pendulum Containing N-point Masses | This paper presents a general formulation of equations of motion of a pendulum with n point mass by use of two different methods. The first one is obtained by using Lagrange Mechanics and mathematical induction(inspection), and the second one is derived by defining a vector. Today, these equations can be obtained by em... | A new modeling method based on sample data is described in this paper,through physics and sample date analysis on displacement vs.voltage characteristics of x-y plane of cylindrical piezoelectric scanner used in scanning probe microscope(SPM).Through sample data statistical analysis,and considering the error factors su... | eng_Latn | 36,964 |
Study and Optimization of the Web Print Fold Mechanism | A study of the factors which affect the fold kinematic activities has been presented,through the design analysis,the sensitivity of acceleration vs.design was obtained.According to the sensitivity,the lengths of linkage and crank were determined as design variables.The optimization technique was applied to an ADAMS Mod... | Abstract In this paper, basic and more realistic dynamic cobweb models are developed in terms of conformable fractional derivatives. The general solutions and stability criteria for the proposed models are given. Moreover, the developed models are illustrated with examples on several time scales. | eng_Latn | 36,972 |
An Equilibrium Model for the Nta Complexation of Metal Ions in Natural Waters | Abstract The equilibrium distribution of NTA among several naturally occurring metal ions has been calculated from previously reported complex ion formation constants. Competition among chelators for the same metals is deduced by introducing the additional model ligands cysteine and citrate to the system. The fraction ... | This paper deals with the study of free transverse vibrations of rectangular plates with an internal line hinge and elastically restrained boundaries. The equations of motion and its associated boundary and transition conditions are rigorously derived using Hamilton’s principle. The governing eigenvalue equation is sol... | eng_Latn | 36,978 |
Dynamic Response of Forum Gdansk Structure due to Rail Traffic | Abstract This paper presents the study of the impact of vibration induced by the movement of the railway rolling stock on the Forum Gdańsk structure. This object is currently under construction and is located over the railway tracks in the vicinity of the Gdańsk Głowny and Gdańsk Środmieście railway stations. The analy... | The article discusses the question of development of software for automated design of road wooden bridge spans. The adaptive pattern of elastic load distribution calculation based on obtained loading theorem providing optimal geometry elements choice is developed. It is given a comparison of the measured real spans def... | eng_Latn | 36,990 |
Linear simulations of acoustic wave propagation in a sun-like spherical shell | Helioseismology is the study of the variations in the internal structure and properties of the dynamics of the sun from measurements of its surface oscillations. We are interested in validating and determining the efficacy of the helioseismic measurement procedure. To this end, we simulate acoustic wave propagation in ... | The paper presents research results referring to the development of a non-invasive method of assessment of the power transformer core technical condition based on the analysis of the mechanical vibrations registered. It characterizes the power object under study, the measuring system used and the developed methodology ... | eng_Latn | 36,999 |
Modal analysis of naval gun bracket based on ANSYS | Aiming at that naval gun bracket is a symmetrical box-style structure and made of stiffeners,the finite element model of bracket is established based on the structural analysis software ANSYS.The static stress and deflection were analyzed by an auxiliary rigid-body model.The natural frequency and mode of naval gun brac... | In the oil production and thermal recovery in the application of oil and gas field, well of curves are regarded as the crooked canal(namely not only the canal has horizontal section but also vertical section), it instead the horizontal well before. Thus establishmented the new elbow well model, the solution of the mode... | eng_Latn | 37,001 |
NONAXISYMMETRIC VIBRATIONS OF CYLINDRICAL SHELLS PARTIALLY FILLED WITH LIQUID | An algorithm is given for calculating frequencies and natural vibration modes of shells described in the title, taking into account the wave motion of the free surface. Boundary conditions corresponding to the elastic fastening of the cylinder's end rims are assumed. The solution is based on general integral equations ... | We study the initial boundary value problem for the nonlinear viscoelastic wave equation with strong damping term and dispersive term. By introducing a family of potential wells we not only obtain the invariant sets, but also prove the existence and nonexistence of global weak solution under some conditions with low in... | yue_Hant | 37,018 |
Simulation of Motions of Berthed Vessels - Simplified Simulation Model | A simulation model for analyses of motions of berted vessels is described. The simulation is performed as a time domain analyses. | This paper presents a suitable solution of studying methods on BRBs’ critical load with finite element software．The effects of the relevant factors on the BRBs’ ultimate bearing capacity are investigated, and some practical suggestions for the design and production are provided． | eng_Latn | 37,022 |
Stability Analysis of Normal DGP Brane-world Model with Agegraphic Dark Energy | The aim of this work is to apply the dynamical system approach to study the linear dynamics of normal DGP brane-world model with agegraphic dark energy as the dark energy component. The stability analysis of the model will be investigated and phase plane portrait will be shown. The nature of critical points will be ana... | The structure of GMA is introduced. Static displacement-force model and magnetism-machine coupling model for helping understand the magnetostriction and establishes simulation model are given. Simulation result shows that response time of machine part is slowness. It brings some disbennifit affection if minish damp. Fo... | kor_Hang | 37,029 |
Buckling strength of deformable monosymmetric I-beams | Abstract An energy method of analysis is developed for studying the inelastic distortional buckling of welded monosymmetric I-beams with slender webs. The method uses the Cambridge model of residual stresses. An eigenproblem of order four is developed, and the microcomputer solution of the problem is very rapid. Follow... | The article discusses the question of development of software for automated design of road wooden bridge spans. The adaptive pattern of elastic load distribution calculation based on obtained loading theorem providing optimal geometry elements choice is developed. It is given a comparison of the measured real spans def... | eng_Latn | 37,031 |
How can I determine a spring stiffness and geometry for a formula student car? | How is the formula for the stiffness of a spring determined? | Can I get 80% marks in physics and chemistry CBSE class 12 boards just by studying past year questions and chapterwise solutions? | eng_Latn | 37,036 |
How do you determine the formula of the stiffness of a spring? | How is the formula for the stiffness of a spring determined? | Can I get 80% marks in physics and chemistry CBSE class 12 boards just by studying past year questions and chapterwise solutions? | eng_Latn | 37,037 |
Bone Marrow Matches Hard for Multiracial | Luke Do was a lively 18-month-old awaiting the birth of his first sibling when he was diagnosed with a rare form of leukemia. The hopes of his parents, both doctors in San Jose, Calif., immediately turned to a bone marrow transplant, but they soon learned some distressing news — Luke's ethnic heritage made him a t... | Your month of birth may influence your risk of multiple sclerosis, says a study published online in the British Medical Journal. The study concluded that people in the northern | eng_Latn | 37,271 |
SENSITIVITY OF HEAVY RAINFALL TO LOCAL VEGETATION TYPES IN SOUTHEASTERN HU'NAN | A modeling study of land surface process impacts on inland behavior of Typhoon Rananim (2004) | No Relationships Between the Within-Subjects’ Variability of Pain Intensity Reports and Variability of Other Bodily Sensations Reports | yue_Hant | 37,521 |
The mission , designed to deploy a satellite to study the approaching Halley 's Comet and to inaugurate the Teacher in Space Project , was delayed numerous times due to bad weather and technical glitches . | The mission was designed to deploy a satellite to study the approaching Halley 's Comet and to inaugurate the Teacher in Space Project . It was delayed several times due to bad weather and technical glitches . | Rosa quickly decayed over the mountains of Mexico , and its cloud shield rapidly accelerated northward through the Plains and Mississippi Valley , moistening the atmosphere enough in Texas ahead of a slow moving occluded cyclone to help set the stage for a significant flood event in east Texas on the October 17 . | eng_Latn | 37,572 |
Massive Hurricane Frances Smothers Florida | Hurricane Frances smothered eastern Florida on Sunday with drenching rains and fierce winds that ripped away roofs, trees and boat moorings and cut power to 1.3 million homes and businesses. | One of Earth's largest-ever megafloods broke apart a strip of land connecting what is now Britain and France, permanently separating them, a new study says. | eng_Latn | 37,633 |
Massive Hurricane Frances Smothers Florida | COCOA, Fla. - Hurricane Frances smothered eastern Florida on Sunday with drenching rains and fierce winds that ripped away roofs, trees and boat moorings and cut power to 1.3 million homes and businesses. | One of Earth's largest-ever megafloods broke apart a strip of land connecting what is now Britain and France, permanently separating them, a new study says. | eng_Latn | 37,634 |
Hurricane Survivors Wait in Line for Aid | PUNTA GORDA, Fla. - Driven from splintered trailers, roofless condos and powerless suburban homes, Hurricane Charley's hungry victims sweated through long lines Monday to find food, showers and drinking water three days after the storm left their lives in shambles... | Staying uninvolved while interviewing participants for a study about the effect of food shortages on H.I.V. treatment is often difficult, one researcher finds. | eng_Latn | 37,722 |
Spain bombs 'follow Eta warning' | Bombs explode in separate Spanish towns after a warning in the name of the armed Basque separatist group, Eta. | California is lagging in key areas of readiness for a bioterrorism attack, according to a national study released yesterday. The state fell short on five of the 10 indicators | eng_Latn | 37,953 |
Houston's Explosive Growth Amid Disregard Of Flood Preparedness | Neena Satija is an investigative reporter for the Texas Tribune, reporting on the flooding in Houston. She led a 2016 investigation into the Houston area's lack of preparation for catastrophic flooding events. | New findings based on the Sept. 11 disaster are prompting emergency workers and architects to rethink evacuation plans and building designs. A study published this week debunks the notion that people are likely to respond quickly to building alarms. NPR's Alix Spiegel reports. | eng_Latn | 38,049 |
Florida - Hurricane Insurance | Phillip Davis reports on the political battle surrounding rising hurricane insurance rates in Florida. Florida insurers have used a scientific model they commissioned to argue that global warming means that Hurricane strength will continue to increase in the coming years, thus the need for rate increases. State meteoro... | Towns across the mountains of east Tennessee and North Carolina suffer severe flood damage. Hurricane Frances had already saturated the ground in the region, and heavy rains from Ivan sent many rivers over their banks. Hear NPR's Chris Arnold. | eng_Latn | 38,146 |
A novel and an effective analytical approach for the LC-MS determination of ethyl glucuronide and ethyl sulfate in urine | A rapid LC-MS/MS method for determination of urinary EtG and application to a cut-off limit study | The Mediatorless Electroanalytical Sensing of Sulfide Utilizing Unmodified Graphitic Electrode Materials | eng_Latn | 38,257 |
Sensitive and selective fluorometric determination of DNA by using layered hexagonal nanosheets of a covalent organic framework prepared from p-phenylenediamine and benzene-1,3,5-tricarboxaldehyde | Chemically Delaminated Free-Standing Ultrathin Covalent Organic Nanosheets | Checking for completeness of 24-h urine collection using para-amino benzoic acid not necessary in the Observing Protein and Energy Nutrition study | eng_Latn | 38,258 |
Theoretical study of palladium cluster structures on carbonaceous supports | α-d-Glucopyranose Adsorption on a Pd30 Cluster Supported on Boron Nitride Nanotube | Surface of localized pleural plaques quantitated by computed tomography scanning: no relation with cumulative asbestos exposure and no effect on lung function | eng_Latn | 38,351 |
Copper status of exposed microorganisms influences susceptibility to metallic nanoparticles | Evaluation of the toxicity of ZnO nanoparticles to Chlorella vulgaris by use of the chiral perturbation approach | Numerical and experimental study of the shielding effectiveness of a metallic enclosure | eng_Latn | 38,367 |
SWARM Absolute Scalar Magnetometer accuracy: Analyses and measurement results | The different factors that affect the SWARM optically pumped Absolute Scalar Magnetometer (ASM) accuracy are reviewed and analyzed. An overall precision of less than 45 pT (1 σ) is reported, which is well under the 300 pT specified for global ASM accuracy. | In this work, the feasibility of using agricultural waste of sorghum (AWS) in the removal of methylene blue (MB) colorant was evaluated. The experiments were carried out using fixed-bed column in a continuous system and the breakthrough curves were adjusted to the mathematical models of Adams and Bohart, Yoon and Nelso... | eng_Latn | 38,481 |
Synthesis of titanium-containing mesoporous molecular sieves with a cubic structure | A titanium-containing mesoporous material with a cubic structure, Ti-MCM-48, is synthesized by a two-stage hydrolysis method using tetraethylorthosilicate and tetrabutylorthotitanate and found to be more active than Ti-MCM-41 in the epoxidation of bulky alkenes using H2O2. | Objective To study the best extracting technology of Compound Taizishen Granule prescription.Methods The total polysaccharides and total saponins were determined by UV spectrophotometer.With the content of total polysaccharides and total saponins as comprehensive indexes,orthogonal test was applied to investigation of ... | eng_Latn | 38,491 |
A highly performed nonenzymatic glucose sensor using surfactant template assisted platinum nanoparticles | In this work, we have successfully developed an enzyme free glucose sensor with highly performed electrodes, which was decorated with surfactant assisted platinum nanoparticles (PtNPs) on rectangular shaped thin Au film electrode. The PtNPs have been used for their outstanding catalytic activity for the redox reaction ... | Background and Objective Chemotherapeutic drug treatment outcomes are genetically determined. Polymorphisms in genes encoding phase II drug metabolizing enzyme glutathione-S-transferase (GST) can possibly predict treatment outcomes, and can be of prognostic significance in breast cancer patients. The aim of this study ... | eng_Latn | 38,496 |
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