bluuebunny/crossref_metadata_2025_split huggingface dataset:
Min-Max Solutions to Some Scalar Field Equations
Authors: Devillanova Giuseppe , Solimini Sergio 
Published: March 2016

Abstract
We show the variational structure of a multiplicity result of positive solutions u ∈ H1(ℝN) to the equation −Δu + a(x)u = up, where N ≥ 2, p > 1 with p < 2∗ − 1 =

and the potential a(x) is a positive function enjoying a planar symmetry. We require suitable decay assumptions which are widely implied by those in [6], in which Wei and Yan have obtained an analogous multiplicity result by using different techniques.
Sublinear Elliptic Equations With Singular Potentials
Authors: Boccardo Lucio , Orsina Luigi 
Published: March 2016

Abstract
In this paper we prove existence and summability results for solutions of equations whose model is

with a > 0 and f in some Marcinkiewicz space, thus extending the results of [4]. We the use these results to prove similar theorems for equations whose model is

with 0 < θ < 1 and p in some Marcinkiewicz space, thus extending the results of [3].
Asymptotic Properties of Ground States of Quasilinear Schrödinger Equations With H1-Subcritical Exponent
Authors: Adachi Shinji , Watanabe Tatsuya 
Published: March 2016

Abstract
We are concerned with the asymptotic behavior of positive radial solutions for a class of quasilinear elliptic equation arising from plasma physics. By the variational argument and dual approach, we show the asymptotic uniqueness and non-degeneracy of the ground state.
Entire Solutions to Nonlinear Scalar Field Equations with Indefinite Linear Part
Authors: Evéquoz Gilles , Weth Tobias 
Published: March 2016

Abstract
We consider the stationary semilinear Schrödinger equation
−Δu + a(x)u = f (x, u), u ∈ H1(ℝN),
where a and f are continuous functions converging to some limits a∞ > 0 and f∞ = f∞(u) as |x| → ∞. In the indefinite setting where the Schrödinger operator −Δ + a has negative eigenvalues, we combine a reduction method with a topological argument to prove the existence of a solution of our problem under weak one-sided asymptotic estimates. The minimal energy level need not be attained in this case. In a second part of the paper, we prove the existence of ground-state solutions under more restrictive assumptions on a and f . We stress that for some of our results we also allow zero to lie in the spectrum of −Δ+a.
One-Signed Harmonic Solutions and Sign-Changing Subharmonic Solutions to Scalar Second Order Differential Equations
Authors: Boscaggin Alberto 
Published: March 2016

Abstract
Using a recent modified version of the Poincaré-Birkhoff fixed point theorem [19], we study the existence of one-signed T-periodic solutions and sign-changing subharmonic solutions to the second order scalar ODE
u′′ + f (t, u) = 0,
being f : ℝ × ℝ → ℝ a continuous function T-periodic in the first variable and such that f (t, 0) ≡ 0. Partial extensions of the results to a general planar Hamiltonian systems are given, as well.
An Example of Chaos for a Cubic Nonlinear Schrödinger Equation with Periodic Inhomogeneous Nonlinearity
Authors: Zanini Chiara , Zanolin Fabio 
Published: March 2016

Abstract
Using a topological approach we prove the existence of infinitely many periodic solutions, as well as the presence of symbolic dynamics for second order nonlinear differential equations of the form
−ü − μu + g(t)h(u) = 0
where μ > 0 is a given constant and g : ℝ → ℝ is a periodic positive weight function. Our main application concerns the study of the case in which h(u) is a cubic nonlinearity. Such a choice is motivated by previous investigations dealing with the nonlinear Schrödinger equation
On the Existence and Breaking Symmetry of the Ground State Solution of Hardy Sobolev Type Equations withWeighted p-LAPLACIAN
Authors: Bhakta Mousomi 
Published: March 2016

Abstract
We study the existence of ground state solution, cylindrically symmetric solution, breaking cylindrical symmetry of ground state solution of the following Hardy-Sobolev type equa- tion with weighted p-Laplacian:

where
Positive Solutions of the Dirichlet Problem for the One-dimensional Minkowski-Curvature Equation
Authors: Coelho Isabel , Corsato Chiara , Obersnel Franco , Omari Pierpaolo 
Published: March 2016

Abstract
We discuss existence and multiplicity of positive solutions of the Dirichlet problem for the quasilinear ordinary differential equation

.
Depending on the behaviour of f = f (t, s) near s = 0, we prove the existence of either one, or two, or three, or infinitely many positive solutions. In general, the positivity of f is not required. All results are obtained by reduction to an equivalent non-singular problem to which variational or topological methods apply in a classical fashion.
On the Orbital Stability of Standing-Wave Solutions to a Coupled Non-Linear Klein-Gordon Equation
Authors: Garrisi Daniele 
Published: March 2016

AbstractWe show the existence of standing-wave solutions to a coupled non-linear Klein-Gordon equation. Our solutions are obtained as minimizers of the energy under a two-charges constraint. We prove that the ground state is stable and that standing-waves are orbitally stable under a non-degeneracy assumption.
Asymptotically Linear Problems and Antimaximum Principle for the Square Root of the Laplacian
Authors: Arcoya David , Colorado Eduardo , Leonori Tommaso 
Published: March 2016

Abstract
This work deals with bifurcation of positive solutions for some asymptotically linear problems, involving the square root of the Laplacian (−Δ)1/2. A simplified model problem is the following:

with Ω ⊂ ℝN a smooth bounded domain, N ≥ 2, λ > 0, m ∈ L∞ (Ω), m+ ≢ 0 and g is a continuous function which is super-linear at 0 and sub-linear at infinity. As a consequence of our bifurcation theory approach we prove some existence and multiplicity results. Finally, we also show an anti-maximum principle in the corresponding functional setting.
The Grand Sobolev Homeomorphisms and Their Measurability Properties
Authors: D’Onofrio Luigi , Sbordone Carlo , Schiattarella Roberta 
Published: March 2016

Abstract
We study the validity of the condition (N) of Lusin for homeomorphisms

under minimal assumptions on the integrability of Df. It turns out that the role of grand Sobolev spaces W1,n) and Wb
1,n) is crucial. A discussion of bi-Sobolev maps in the plane and their connections with degenerate elliptic PDEs is provided.
On a Class of Reversible Elliptic Systems
Authors: Rabinowitz Paul H. 
Published: March 2016

Abstract
For a semilinear elliptic system of PDE’s which is spatially reversible, we establish the existence of solutions in C2(ℝ2 × Tn−2, ℝm) that are heteroclinic in x2 between a pair of solutions in C2(ℝ × Tn−1, ℝm) that are each heteroclinic in x1. The proof uses minimization arguments.
Eigenvalue Problems for a Cooperative System with a Large Parameter
Authors: Daners Daniel 
Published: March 2016

Abstract
We consider the principal eigenvalue of a cooperative system of elliptic boundary value problems as a parameter tends to infinity. The main aim is to introduce a new approach to deal with the limit problem by focusing on the resolvent operator corresponding to the system rather than the eigenvalue problem itself. This allows the consistent use of elementary properties of bilinear forms and the semi-groups they induce. At the same time we weaken assumptions in related work.
Statistical Functional Equations and p-Harmonious Functions
Authors: Hartenstine David , Rudd Matthew 
Published: March 2016

Abstract
Motivated by the mean-value property characterizing harmonic functions and recently established asymptotic statistical formulas characterizing p-harmonic functions, we consider the Dirichlet problem for a functional equation involving a convex combination of the mean and median. We show that this problem has a continuous solution when it has both a subsolution and a supersolution. We demonstrate that solutions of these problems approximate p-harmonic functions and discuss connections with related results of Manfredi, Parviainen and Rossi.
Invariant Foliations Near Normally Hyperbolic Equilibria for Quasilinear Parabolic Problems
Authors: Prüss Jan , Wilke Mathias , Simonett Gieri 
Published: March 2016

Abstract
We consider quasilinear parabolic evolution equations in the situation where the set of equilibria forms a finite-dimensional C1-manifold which is normally hyperbolic. The existence of foliations of the stable and unstable manifolds is shown assuming merely C1-regularity of the underlying equation.
Existence and Stability of Solutions of General Semilinear Elliptic Equations with Measure Data
Authors: Véron Laurent 
Published: March 2016

Abstract
We study existence and stability for solutions of −Lu + g(x, u) = ω where L is a second order elliptic operator, g a Caratheodory function and ω a measure in Ω. We present a unified theory of the Dirichlet problem and the Poisson equation. We prove the stability of the problem with respect to weak convergence of the data.
Quasilinear Equations via Elliptic Regularization Method
Authors: Liu Jia-Quan , Liu Xiang-Qing , Wang Zhi-Qiang 
Published: March 2016

Abstract
In this paper we study a class of quasilinear problems, in particular we deal with multiple sign-changing solutions of quasilinear elliptic equations. We further develop an approach used in our earlier work by exploring elliptic regularization. The method works well in studying multiplicity and nodal property of solutions.
Synchronic and Asynchronic Descriptions of Irrigation Problems
Authors: Maddalena Francesco , Solimini Sergio 
Published: March 2016

Abstract
In this paper we complete our work started in [31], where the present paper was announced; in order to set a unified theory of the irrigation problem. The main result of the paper is the equivalence of the various formulations introduced so far as well as a new one introduced here. To this aim we introduce several geometric and analytical concepts which are essential for reaching our final goal even if they may deserve an intrinsic interest in themselves.
An Existence Theorem for Semi-linear Elliptic Systems
Authors: Zou Henghui 
Published: March 2016

Abstract
We study the following boundary value problem of semi-linear elliptic systems
Δu + f(x, u, ∇u) =0 in Ω,
u =0 on ∂Ω
where Ω ⊂ ℝn (n ≥ 2) is a connected and bounded smooth domain, and u and f are real vector-valued functions. Under appropriate conditions on the function f, we establish a general existence result for positive solutions. We continue our earlier works [15, 16, 17] and, in particular, remove a requirement of the cooperative structure on elliptic systems. As examples, we consider the stationary Klein-Gordon-Maxwell system and Maxwell- Schrodinger system, both lacking the cooperative structure..
Pseudorelativistic Hartree Equation with General Nonlinearity: Existence, Non-existence and Variational Identities
Authors: Mugnai Dimitri 
Published: March 2016

Abstract
We prove several existence and non existence results of solitary waves for a class of nonlinear pseudo-relativistic Hartree equations with general nonlinearities. We use variational methods and some new variational identities involving the half Laplacian.
Liouvillian First Integrals for Generalized Liénard Polynomial Differential Systems
Authors: Llibre Jaume , Valls Clàudia 
Published: March 2016

Abstract
We study the Liouvillian first integrals for the generalized Liénard polynomial differential systems of the form xʹ = y, yʹ = -g(x) - f(x)y, where g(x) and f(x) are arbitrary polynomials such that 2 ≤ deg g ≤ deg f.
Anisotropic Variable Exponent (p(·), q(·))-Laplacian with Large Exponents
Authors: Pérez-Llanos Mayte 
Published: March 2016

Abstract
In this work we consider the following Dirichlet problem corresponding to the anisotropic (p(·), q(·))−Laplacian operator with variable exponents

and study the behaviour of the solutions as the exponents p(x, y), q(x, y) → ∞ uniformly in Ω ⊂ ℝN+K. We denote by

and similarly

the gradients of u with respect to the first N variables (x variables) and with respect to the last K variables (y variables), respectively. We consider sequences of exponents pn(x, y), qn(x, y) going to infinity uniformly in Ω and verifying suitable assumptions. We prove that un, the solutions with p(x, y) = pn(x, y) q(x, y) = qn(x, y), converge uniformly in Ω̅ to some nontrivial limit, u∞, as an → ∞. We determine the limit equation verified by u∞ as well as some properties of this limit. Finally, we focus on the case f = 0 (with nontrivial Dirichlet boundary conditions, u = g ≢ 0 on ∂Ω) and show uniqueness for the limit problem.
No work and all play – the intersections between labour, fun and exploitation in online translation communities
Authors: Rogl Regina 
Published: March 2016

AbstractEmerging internet technologies have revolutionized and invaded our private and professional lives in ways that are as yet hard to assess. These developments have also affected the field of translation. Professional translators’ workplaces and routines have changed profoundly and translation markets have been affected by increasing globalization. Furthermore, new forms of translation have emerged on the internet, including amateur translators’ communities which offer their time and efforts for a variety of different goals, not all of them exclusively charitable. Some are also commercial, others just for fun.In this context, the present article demonstrates the ways in which recent developments related to the internet have started to call into question a series of long-established categories. Online phenomena have not only contributed to blurring the lines between the consumption and production of content; it has also become increasingly difficult to distinguish between amateurs and professionals or between work and leisure, and to differentiate between play and labour.Drawing on examples from an ongoing research project on collaborative translation communities, this article illustrates how members of internet communities perceive, describe and construct their own translation activities. The paper then addresses the issue of how the internet paved the way for new forms of exploitation, which are also identifiable in the field of translation. By looking at the intersections between labour, fun and exploitation in internet translation communities, the paper aims to make a critical contribution to the debate on (ethical) questions that arise in relation to new online phenomena.
Estimating an NBA player’s impact on his team’s chances of winning
Authors: Deshpande Sameer K. , Jensen Shane T. 
Published: March 2016

Abstract
Traditional NBA player evaluation metrics are based on scoring differential or some pace-adjusted linear combination of box score statistics like points, rebounds, assists, etc. These measures treat performances with the outcome of the game still in question (e.g. tie score with five minutes left) in exactly the same way as they treat performances with the outcome virtually decided (e.g. when one team leads by 30 points with one minute left). Because they ignore the context in which players perform, these measures can result in misleading estimates of how players help their teams win. We instead use a win probability framework for evaluating the impact NBA players have on their teams’ chances of winning. We propose a Bayesian linear regression model to estimate an individual player’s impact, after controlling for the other players on the court. We introduce several posterior summaries to derive rank-orderings of players within their team and across the league. This allows us to identify highly paid players with low impact relative to their teammates, as well as players whose high impact is not captured by existing metrics.
Surrogatmarker der Insulinresistenz bei Studienteilnehmern mit metabolischem Syndrom – Daten der Berliner Altersstudie II
Authors: Buchmann Nikolaus , Norman Kristina , Demuth Ilja , Steinhagen-Thiessen Elisabeth 
Published: March 2016

Zusammenfassung

Hintergrund: Als metabolisches Syndrom (MetS) wird ein Symptomkomplex metabolischer Veränderungen bezeichnet, der eng mit Insulinresistenz (IR) assoziiert ist. Cutoff Werte für HOMA-IR, einem Surrogatparameter für IR, zur Identifikation von Probanden mit MetS sind nicht etabliert.

Methoden: Insgesamt lagen Querschnittsdaten von 446 Studienteilnehmern im jüngeren Lebensalter (53% Frauen, 28±3 Jahre alt) und 1271 im höheren Lebensalter (52% Frauen, 68±4 Jahre alt) ohne Diabetes vor. MetS wurde nach den IDF/AHA/NHLBI (International Diabetes Foundation/American Heart Association/National Health, Lung and Blood Institute) Kriterien von 2009 definiert. Mittels ROC-Analyse wurden Cutoff-Werte für HOMA-IR berechnet, oberhalb derer Probanden mit MetS mit höchster Sensitivität und Spezifität erkannt werden konnten. Zuletzt wurden binär logistische Regressionsmodelle berechnet.

Ergebnisse: Die Prävalenz von MetS betrug 6,7% bei den jungen und 28,3% bei den älteren Probanden. Cutoff-Werte für HOMA-IR, oberhalb derer MetS identifiziert werden konnte, waren HOMA-IR >1,88 (bei jungen Studienteilnehmern; Sensitivität 80%, Spezifität 85,3%, positiv prädiktiver Wert 80%, negativ prädiktiver Wert 15%) und HOMA-IR >1,98 (bei den älteren Studienteilnehmern; Sensitivität 73,6%, Spezifität 72,9%, positiv prädiktiver Wert 74%, negativ prädiktiver Wert 27%). Patienten oberhalb dieser Cutoff-Werte hatten im höchst adjustierten (Alter, BMI, Geschlecht, körperliche Aktivität und getrennt nach Altersgruppen) binären Regressionsmodell Odds von 5,7 (95% CI: 4,1–7,9) bei älteren und 22,2 (95% CI: 7,0–70,5) bei jüngeren Studienteilnehmern, MetS aufzuweisen.

Schlussfolgerungen: Cutoff-Werte für HOMA-IR sind im Klinikalltag nicht etabliert, könnten aber herangezogen werden, um Personen mit MetS zu identifizieren und gegebenenfalls frühzeitig eine Therapie einzuleiten, auch wenn aufgrund der negativen prädiktiven Werte eine Diagnostik des MetS durch HOMA-IR allein nicht erfolgen kann.
On Money, God, and Dogmatic Liberalism: A Reply to my Critics
Authors: Blake Michael 
Published: March 2016

Abstract
Darrel Moellendorf, David Owen, and Lea Ypi have offered some subtle and powerful criticisms of the view I defend in Debating Brain Drain. I here focus on two broad category of criticism. The first is that my use of metaphor is faulty. I try to demonstrate that the right to emigrate is similar in moral strength to the right to freely exercise one’s religion, and not morally akin to the (non-existent) right to be free from paying taxes. I defend the proposition that the taking of money from people is morally distinct from the taking of time; we have reason to regard the latter sort of taking as more difficult to justify. The second category of criticism focuses on the theoretical assumption of my view, and argues that the liberalism I endorse begs important questions: it might be at such a high level of abstraction that it cannot answer the most important questions of political ethics, or it might assume so much about the nature of liberalism that it is dogmatic and unpersuasive. I argue, in response, that a political theory need not answer all political questions in order to be of use, and that the insistence on liberal rights represents not dogma but valid moral concerns.
Long-term changes in the total development time of Copepoda species occurring in large numbers in the Southern Baltic Sea – numerical calculations
Authors: Figiela Mariusz , Musialik-Koszarowska Maja , Nowicki Artur , Lemieszek Anna , Kalarus Marcin , Druet Czesław 
Published: March 2016

Abstract
The study presents changes in the total development time of Copepoda species, i.e. Pseudocalanus sp., Temora longicornis and Acartia spp. occurring in large numbers in the Southern Baltic Sea. The following factors were taken into account: temperature, salinity and concentration of food. The presented research involved simulations with greenhouse gas emissions scenarios A1B and B1. The analysis was performed for naupliar and copepodid stages combined together, and the results present the total development time of organisms from the naupliar stage to the adult form. The calculations were carried out using numerical methods based on the experimental data available in the literature.
Instability of spring environmental conditions as a driver of biotic interactions and crustacean structuring in meteorite crater ponds (Morasko, Poland)
Authors: Świdnicki Kasper , Basińska Anna M. , Kuczyńska-Kippen Natalia 
Published: March 2016

AbstractThere are 150 meteorite craters worldwide, however, their aggregations are rarely noted. The nature reserve ‘Meteoryt Morasko’ in Poland with fishless meteorite ponds was analyzed as a unique ecosystem for biological analysis of invertebrate interactions. The aim of the study was to recognize the main environmental drivers of cladoceran and copepod community structure from among biotic (competitors and predators) and abiotic factors (i.e. oxygen and pH level) in the spring season.The abundance of small cladocerans (Alonella excisaandChydorus sphaericus) was the highest at the end of the spring season, i.e. in June, while large species (Daphnia pulexandSimocephalus exspinosus) were most abundant in May. Both size groups of Cladocera were negatively affected by invertebrate predators (Chaoborus crystallinusand carnivorous copepods), which are known to play an important role in structuring cladoceran communities due to the fishless character of the studied ponds. No negative effect of those predators was found for Copepoda, however, nauplii density was reduced by competitors (Aedes communislarvae and ostracods).The temporary character of the examined ponds, oxygen depletion and low pH of water in the shallowest pond resulted in the abundant occurrence of cladoceran males, whose high densities are usually observed in autumn.
Ecological preferences of freshwater Ulva flexuosa (Ulvales; Ulvophyceae): development of macroalgal mats in a Tulce fishpond (Wielkopolska Region, Poland)
Authors: Rybak Andrzej S. 
Published: March 2016

Abstract
Research on the diversity of thalli and mats built by freshwater Ulva flexuosa, as well as the impact of abiotic factors on the development and distribution of Ulva mats, was conducted from May to August 2013. The study describes the dynamics of “green tides” formation by U. flexuosa. The study assessed abiotic factors that may influence the colonization and the growth of Ulva populations in freshwater systems. The results are of major importance to the trade and industry sectors. In total, eleven environmental parameters were included in the analysis. The most important environmental parameters characterizing the Ulva sites are sodium chloride levels and conductivity. High values of pH inhibited the development of Ulva, leading to a lower percentage of mature thalli in the mats. The water depth was positively correlated with an increase in the density of thalli in the mats and the average thallus length. Significant differences were identified between the concentrations of nitrates under and outside the Ulva mats. Concentrations of nitrate under the Ulva thalli were always lower.
Simultaneous multi-element determination in different seed samples of Dodonaea viscosa hopseed using instrumental neutron activation analysis
Authors: El-Sweify Fatma H. , El-Amir Mahmoud A. , Mostafa Mohamed , Ramadan Hala E. , Rashad Ghada M. 
Published: March 2016

Abstract
Instrumental neutron activation analysis technique (INAA) was applied for nondestructive multi-element analysis of seed samples of the
plant Dodonaea viscosa hopseed. This plant is distributed all over Egypt, because of its suitable properties. The samples were
collected from some bushes grown at different sites in some governorates, in July of each year during the period from 2004 to 2011. The
determined elements are: Co, Cs, Eu, Fe, Hg, Ni, Rb, Sc, Se, Sr
and Zn, under the chosen irradiation and cooling times. The content of some elements has been compared with data obtained from
previous work on analysis of various kinds of seeds. The influence of some parameters on the determined elemental content is
discussed. Standard reference materials IAEA-155 and IAEA-V-10 were used to assure quality control, accuracy and precision of the
technique.