bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of prismatic springs of non-circular coil shape and non-prismatic springs of circular coil shape by analytical and finite element methods
Authors: Chaudhury Arkadeep Narayan , Datta Debasis 
Published: February 2017

AbstractThis paper presents a methodology for designing prismatic springs of non-circular coil shape and non-prismatic springs of circular coil shape using analytical and numerical methods. To start with, simple analytical formulations for obtaining the axial deformation of the springs under axial load have been demonstrated. Next, the processes of obtaining CAD models of the springs and their subsequent finite element analysis (FEA) in commercial softwares have been outlined. In the third part, the different springs have been compared with a common cylindrical spring and their merits compared to a common spring have been demonstrated. Next, a fairly accurate analytical formulation (with maximum error of ∼7–8%) for obtaining the value and location of maximum shear stress for all the springs has been demonstrated. Next, two aspects of non-prismatic springs under dynamic loads, viz. damping introduced in a vibrating system and contribution of the spring to the equivalent mass in a one dimensional vibrating spring mass system due to shape of the spring have been discussed. The last part involves an analytical formulation for the linear elastic buckling of two springs with circular coil shapes. For the majority of the work, emphasis has been on obtaining and using closed form analytical expressions for different quantities while numerical techniques such as FEA have been used for validation of the same.Highlights Analytical formulations of axial deflection different springs under axial load. CAD modeling and FEA of prismatic and non prismatic springs of different coil shapes. Comparison of stress and deflection in mass-equivalent springs of different geometry. Approx. analytical formulation for the location and value of max. stress in springs. Effects of spring shape on damping, vibrational properties in 1D systems and buckling.
Estimates for solutions of nonlinear variational inequalities
Authors: Posteraro M.R. 
Published: February 2017

We prove a pointwise estimate for the solution

u

of a nonlinear variational inequality in terms of a function which is solution of a suitable variational inequality with spherically symmetric data. Using this result a lower bound for the measure of the set

\{x : u(x) = 0\}

and
a priori
estimates for the

L^p

-norm and the

W_{0}^{1,p}

-norm of

u

are obtained. An existence result is also given.

Résumé

On démontre une estimation ponctuelle pour la solution

u

d’une inéquation variationnelle non linéaire en fonction de la solution d’une inéquation variationnelle opportune dont les données sont à symétrie sphérique. En utilisant ce résultat on obtient une borne inférieure de la mesure de l’ensemble

\{x : u(x) = 0\}

et une estimation
a priori
des normes

L^p

et

W_{0}^{1,p}

de

u

. De plus est donné un résultat d’existence.
Solutions of Ginzburg–Landau equations and critical points of the renormalized energy
Authors: Lin Fang Hua 
Published: February 2017

Here we establish some connection between solutions of Ginzburg–Landau equations and critical points of the renormalized energy

W_g

introduced in the recent works of Bethuel–Brezis and Helein. In particular, local nondegenerate minimums of

W_g

have their associated solutions of GL-equations.

Résumé

On établit une relation entre Ies solutions de l’équation de Ginzburg–Landau et les points critiques de l’énergie renormalisée

W_g

introduite dans Ies travaux récents de Bethuel–Brezis et Helein. En particulier, tout minimum local non dégénéré de

W_g

est associé à une famille de solutions des équations de G-L.
Normal form and global solutions for the Klein-Gordon-Zakharov equations
Authors: Ozawa T. , Tsutaya K. , Tsutsumi Y. 
Published: February 2017

In this paper we study the global existence and asymptotic behavior of solutions for the Cauchy problem of the Klein–Gordon–Zakharov equations in three space dimensions. We prove that for small initial data, there exist the unique global solutions of the Klein–Gordon–Zakharov equations. We also show that these solutions approach asymptotically the free solutions as

t → ∞

. Our proof is based on the method of normal forms introduced by Shatah [12], which transforms the original system with quadratic nonlinearity into a new system with cubic nonlinearity.

Résumé

Dans cet article, nous étudions l’existence globale et le comportement asymptotique de solutions pour le problème de Cauchy des équations de Klein–Gordon–Zakharov en trois dimensions. Nous montrons que pour des petites données initiales, il existe les solutions globales uniques des équations de Klein–Gordon–Zakharov. Nous montrons aussi que ces solutions approchent des solutions libres asymptotiquement lorsque

t → ∞

. Notre preuve est basée sur la méthode de formes normales introduite par Shatah [12], qui transforme le système original avec non-linéarité quadratique en un système neuf avec non-linéarité cubique.
Vortices for a variational problem related to superconductivity
Authors: Bethuel Fabrice , Rivière Trista 
Published: February 2017

We study minimizers of Ginzburg–Landau functional, which depend on a parameter

ϵ

. These functional appear in superconductivity and two dimensional abelian Higgs models. We study the asymptotic limit, as

ϵ → 0

, of minimizers and show that the limiting configuration has vortices, which have topological degree one.

Résumé

Nous étudions les applications minimisantes de la fonctionnelle de Ginzburg–Landau dépendant d’un paramètre

ϵ

. Cette fonctionnelle intervient dans les problèmes de supraconductivité ainsi que dans le modèle abélien de Higgs en dimension deux. Plus particulièrement, nous étudions le comportement asymptotique de ces applications minimisantes lorsque

ϵ

tend vers

0

et nous montrons que la configuration limite a des tourbillons de degré

1

.
Unicité et minimalité des solutions d’une équation de Ginzburg-Landau
Authors: Carbou Gilles 
Published: February 2017

We study the solutions of the equation

−∆u + u(u^2 − 1) = 0

where

u

is in

H_{loc}^{1}\:(ℝ^{n})

. We prove that the map

f\left(x_{1},…,x_{n}\right) = th\:\left(\frac{x_{1}}{\sqrt{2}}\right)

is a minimizing solution in the class of functions which converge to

−1

when

x_1

goes to

−∞

and to

+1

when

x_1

goes to

+∞

. Furthermore we show that any solution of the equation which converges to

1

when

|x|

goes to

+∞

is constant equal to

1

on

ℝ^n

.

Résumé

On étudie les solutions de l’équation

−∆u + u(u^2 − 1) = 0

, où

u

est élément de

H_{\mathrm{loc}}^{1}\:(ℝ^{n})

. On montre que la solution

f\left(x_{1},…,x_{n}\right) = th\:\left(\frac{x_{1}}{\sqrt{2}}\right)

minimise l’énergie parmi les fonctions tendant vers

−1

lorsque

x_1

tend vers

−∞

et vers

+1

lorsque

x_1

tend vers

+∞

. De plus, on prouve que toute solution de l’équation qui tend vers

1

lorsque

|x|

tend vers

+∞

est constante égale à

1

sur

ℝ^n

.
Asymptotic behaviour of solutions and their derivatives, for semilinear elliptic problems with blowup on the boundary
Authors: Bandle Catherine , Marcus Moshe 
Published: February 2017

By means of comparison functions the asymptotic behaviour of solutions of semilinear elliptic equations which blow up at the boundary is established. The results depend only on the principal part of the second order operator and can be expressed in a simple way in terms of the associated Riemannian metric. In order to discuss the asymptotic behaviour of the derivatives a blowup technique together with a scaling argument is used.

Résumé
On utilise des fonctions de comparaison afin d’établir Ie comportement asymptotique des solutions de problèmes elliptiques semilinéaires qui explosent au bord. Les résultats s’expriment de manière simple à l’aide de Ia métrique de Riemann associée à cet opérateur. L’étude des dérivées repose sur une technique de blowup et utilise une invariance de groupe des solutions.
Homoclinic and period-doubling bifurcations for damped systems
Authors: Bessi Ugo 
Published: February 2017

We consider the following problem

\tag{$P^\alpha$}
\begin{cases}
ü= −V'(u,t)−\alpha \.{u} \\
u(−∞) = \.{u}(−∞) = 0 = u(∞) = \.{u}(∞)
\end{cases}

where

V\in C^2 (\mathbf R^n × \mathbf R, \mathbf R)

is one-periodic in time and behaves roughly like

V(x,t) \simeq −\frac{1}{2}\left|x\right|^{2} + \left|x\right|^{\mu }

for some

μ > 2

. It has been shown in [6] that

0 \in \mathbf R^{2n}

is a hyperbolic fixed point for

\Phi_α

, the step-1 map associated to equation (

P^α

), and that

\Phi_0

has points homoclinic to 0,
i.e.
(

P^0

) has a solution not identically 0. We will show that, if the solutions of (

P^0

) are isolated in

H^1 (\mathbf R , \mathbf R^n)

, then

\Phi_α

has positive topological entropy for

α\in [0, \bar α]

for some

\bar α > 0

. Moreover, we will follow a branch of solutions of (

P^α

) as

α

varies in

\mathbf R^+

up to an homoclinic tangency and show the existence of an infinite cascade of period-doubling bifurcations near this tangency.

Résumé
Nous considérons le problème suivant

\tag{$P^\alpha$}
\begin{cases}
ü= −V'(u,t)−\alpha \.{u} \\
u(−∞) = \.{u}(−∞) = 0 = u(∞) = \.{u}(∞)
\end{cases}

où

V\in C*2 (\mathbf R^n × \mathbf R, \mathbf R)

est périodique en temps de période 1 et se comporte comme

V\left(x,t\right) = \simeq −\frac{1}{2}\left|x\right|^{2} + \left|x\right|^{\mu }

, avec

μ > 2

. Il a été montré dans [6] que

0 in \mathbf R^{2n}

est un point fixe hyperbolique pour

\Phi_α

, l’application de temps 1 associée à l’équation (

P^α

), et que

\Phi_0

des points homoclines à 0,
i.e.
que

P^0

a une solution non identiquement nulle. Nous prouvons que, si les solutions de (

P^0

) sont isolées dans

H^1 (\mathbf R, \mathbf R^n)

, alors

\Phi_0

a une entropie topologique positive si

α\in [0, \bar α]

avec

\bar α > 0

. De plus, nous suivons une branche de solutions de (

P^α

) quand

α

varie dans

\mathbf R^+

jusqu’à une tangente homocline et nous prouvons l’existence d’une cascade infinie de bifurcations avec doublement de périodes près de cette tangente.
Famous Last Words: Caesar’s Prophecy on the Ides of March
Authors: Ziogas Ioannis 
Published: February 2017

AbstractShakespeare’s Et tu, Brute has been influential in shaping a tradition that interprets Caesar’s last words as an expression of shock at Brutus’ betrayal. Yet this interpretation is not suggested in the ancient sources that attest the tag καὶ σύ, τέκνον (‘you too, son’). This article argues that Caesar’s dictum evokes a formula of funerary epigrams, which refers to death as the common lot of all mortals. The epitaphic connotations of καὶ σύ or tu quoque feature in epic poetry, a connection that lends a Homeric dimension to Caesar’s last words. The dictator’s oral epitaph predicts the death of Brutus as a consequence of his involvement in the assassination. It means ‘You too, son, will die’. The Greco-Roman belief that a dying man can foresee the future invests Caesar’s last words with prophetic authority.
Current State of Antimicrobial Stewardship in Children’s Hospital Emergency Departments
Authors: Mistry Rakesh D. , Newland Jason G. , Gerber Jeffrey S. , Hersh Adam L. , May Larissa , Perman Sarah M. , Kuppermann Nathan , Dayan Peter S. 
Published: February 2017

BACKGROUNDAntimicrobial stewardship programs (ASPs) effectively optimize antibiotic use for inpatients; however, the extent of emergency department (ED) involvement in ASPs has not been described.OBJECTIVETo determine current ED involvement in children’s hospital ASPs and to assess beliefs and preferred methods of implementation for ED-based ASPs.METHODSA cross-sectional survey of 37 children’s hospitals participating in the Sharing Antimicrobial Resistance Practices collaboration was conducted. Surveys were distributed to ASP leaders and ED medical directors at each institution. Items assessed included beliefs regarding ED antibiotic prescribing, ED prescribing resources, ASP methods used in the ED such as clinical decision support and clinical care guidelines, ED participation in ASP activities, and preferred methods for ED-based ASP implementation.RESULTSA total of 36 ASP leaders (97.3%) and 32 ED directors (86.5%) responded; the overall response rate was 91.9%. Most ASP leaders (97.8%) and ED directors (93.7%) agreed that creation of ED-based ASPs was necessary. ED resources for antibiotic prescribing were obtained via the Internet or electronic health records (EHRs) for 29 hospitals (81.3%). The main ASP activities for the ED included production of antibiograms (77.8%) and creation of clinical care guidelines for pneumonia (83.3%). The ED was represented on 3 hospital ASP committees (8.3%). No hospital ASPs actively monitored outpatient ED prescribing. Most ASP leaders (77.8%) and ED directors (81.3%) preferred implementation of ED-based ASPs using clinical decision support integrated into the EHR.CONCLUSIONSAlthough ED involvement in ASPs is limited, both ASP and ED leaders believe that ED-based ASPs are necessary. Many children’s hospitals have the capability to implement ED-based ASPs via the preferred method: EHR clinical decision support.Infect Control Hosp Epidemiol 2017;38:469–475
Filling the Gondwanan gap: paleobiogeographic implications of new crinoids from the Castillejo and Fombuena formations (Middle and Upper Ordovician, Iberian Chains, Spain)
Authors: Cole Selina R. , Ausich William I. , Colmenar Jorge , Zamora Samuel 
Published: February 2017

AbstractA diverse crinoid fauna is described from the Upper Ordovician (Katian) Fombuena Formation from the eastern Iberian Chains of Spain. New crinoids include the diplobathrid cameratesFombuenacrinus nodulusn. gen. n. sp.,Goyacrinus gutierrezin. gen. n. sp.,Dalicrinus hammannin. gen. n. sp., andAmbonacrinus decorusn. gen. n. sp.; the monobathrid camerateEopatelliocrinus hispaniensisn. sp.; and the cladidPicassocrinus villasin. gen. n. sp. A new occurrence ofHeviacrinus melendeziGil Cid, Domínguez Alonso, and Silván Pobes, 1996 is also documented from the Castillejo Formation (Darriwilian, Middle Ordovician) from the eastern Iberian Chains of Spain. The Fombuena Formation comprises a Gondwanan crinoid assemblage from a high paleolatitude and has the highest crinoid diversity of any currently known Katian Gondwanan fauna. This assemblage is compared to other Katian age faunas around the globe, and its paleobiogeographic implications are discussed.
Can secondary osteons be used as ontogenetic indicators in sauropods? Extending the histological ontogenetic stages into senescence
Authors: Mitchell Jessica , Sander P. Martin , Stein Koen 
Published: February 2017

AbstractSauropod bone histology has provided a great deal of insight into the life history of these enormous animals. However, because of high growth rates, annual growth rings are not common in sauropod long bones, so directly measuring growth rates and determining sexual maturity require alternative measures. Histological ontogenetic stages (HOS) have been established to describe the changes in bone histology through development for basal Macronaria and Diplodocoidea, and subsequently for Titanosauria. Despite this, the current HOS model is not able to discriminate bone tissues in late ontogeny, when sauropods had reached asymptotic size and continued to live into senescence but their long bones became extensively remodeled by secondary osteons and all primary bone was destroyed. Here we establish remodeling stages (RS) to characterize the Haversian bone development through ontogeny in eight sauropod taxa (Apatosaurinae,Giraffatitan brancai,Camarasaurusspp.,Dicraeosaurusspp.,Ampelosaurus atacis,Phuwiangosaurus sirindhornae,Magyarosaurus dacus, andAlamosaurus sanjuanensis) and find significant correlation of RS with corresponding femur length (CFL) for the studied taxa, with the exception ofDicraeosaurusandMagyarosaurus. Remodeling stages are based on the maximum number of observable generations of crosscutting osteons from the innermost, mid-, and outermost part of the cortex. The correlation with CFL indicates that secondary osteons present an ontogenetic signal that could extend the histological ontogenetic stages. Remodeling stages also provide additional insight into the changes in histology through ontogeny for Sauropoda. This method has the potential to be used in other taxa, such as thyreophorans and many ornithischians, that develop Haversian tissue through development.
Oscillating behaviour of laminar separation bubble formed on an aerofoil near stall
Authors: Rinoie K. , Takemura N. 
Published: February 2017

AbstractLaminar separation bubbles formed on NACA 0012 aerofoil near the onset of a stall were investigated to clarify the behaviour of the laminar separation bubble. Measurements were done at a chord Reynolds number of 1·3 × 105. Mean velocity measurements indicate that the long bubble of about 35% chord length is formed at α = 11·5° after the short bubble burst occurred. However, the instantaneous flow visualisation picture indicates that the flow is strongly oscillating at this angle of attack. The phase averaging technique has been applied to analyse this oscillating behaviour. The results indicate that the flow is oscillating between a small separation-reattachment bubble formed near the leading-edge at about a 10% chord length and a large separated region extending over the aerofoil surface. It is suggested that this small separation-reattachment bubble has a similar flow structure to that of the short bubble formed at a lower angle of attack.
Medication Use, Substance Use, and Psychological Conditions of Female Inmates in Canadian Federal Prisons
Authors: Plourde Chantal , Dufour Natasha , Brochu Serge , Gendron Annie 
Published: February 2017

SummaryThis study provides data on substance use patterns, including medications, among female inmates in Canadian federal prisons. The participants were interviewed regarding their substance use and their psychological condition before and during incarceration. Their medication cards were also analyzed. The results show that a large proportion (66.9 %) of these incarcerated women reported substance abuse prior to incarceration and exhibited psychological disorders. In prison, if the illicit substance use remained low, most subjects had prescriptions for more than one medication. Furthermore, women with psychotropic medication prescriptions in their file had, on average, prescriptions for two different psychotropic medications. Significant relationships were found between substance misuse before incarceration and illicit substance use or and psychotropic medication use during incarceration. These results support the need to develop integrated services for both addiction and mental health for female offenders during incarceration.
Nutrient intake variability and the number of days needed to estimate usual intake in children aged 13–32 months
Authors: Padilha Luana L. , França Ana Karina T. d. C. , da Conceição Sueli I. O. , Carvalho Wyllyane Rayana C. , Batalha Mônica A. , da Silva Antônio A. M. 
Published: February 2017

AbstractThe number of days of data required to accurately estimate usual nutrient intake of children is not well established. This study aims to calculate the variability and the number of days required to estimate usual nutrient intake in children aged 13–32 months. This cross-sectional study, which is part of the BRISA Project in São Luís, Maranhão, Brazil, involved 231 children from April 2011 to January 2013. Socio-economic and demographic data were collected using a questionnaire, and 3 non-consecutive days of food consumption were collected using a 24-h dietary recall (24HDR) survey. Intrapersonal and interpersonal variability and variance ratio (VR) were obtained for each nutrient using the Multiple Source Method®program (version 1.0.1). The number of days (d) needed was calculated using the formula proposed by Blacket al. for different correlation coefficients (r) (i.e. 0·7, 0·8 or 0·9). For the vast majority of nutrients, intrapersonal and interpersonal variability values of <1 were observed, with even smaller intrapersonal variabilities, resulting in low VR (<1). More days were needed to estimate intakes of soluble fibre (12), insoluble fibre (11), total fibre (10), vitamin C (9) and PUFA (7), while fewer days were needed for energy, carbohydrate, SFA, Ca, Fe, P and Zn (all had 2 d forr0·9). However, most nutrients required one, two or three 24HDR forr0·7, 0·8 or 0·9.
Place reference in story beginnings: A cross-linguistic study of narrative and interactional affordances
Authors: Dingemanse Mark , Rossi Giovanni , Floyd Simeon 
Published: February 2017

AbstractPeople often begin stories in conversation by referring to person, time, and place. We study story beginnings in three societies and find place reference is recurrently used to (i) set the stage, foreshadowing the type of story and the kind of response due, and to (ii) make the story cohere, anchoring elements of the developing story. Recipients orient to these interactional affordances of place reference by responding in ways that attend to the relevance of place for the story and by requesting clarification when references are incongruent or noticeably absent. The findings are based on 108 story beginnings in three unrelated languages: Cha'palaa, a Barbacoan language of Ecuador; Northern Italian, a Romance language of Italy; and Siwu, a Kwa language of Ghana. The commonalities suggest we have identified generic affordances of place reference, and that storytelling in conversation offers a robust sequential environment for systematic comparative research. (Storytelling, place, narrative, conversation analysis, interactional linguistics)*
The effect of childhood multilingualism and bilectalism on implicature understanding
Authors: ANTONIOU KYRIAKOS , KATSOS NAPOLEON 
Published: February 2017

ABSTRACTThe present study compares the performance of multilingual children speaking Cypriot Greek, Standard Modern Greek, and English (and sometimes an additional language), bilectal children speakers of Cypriot Greek and Standard Modern Greek, and Standard Modern Greek-speaking monolingual children on a task that measures the comprehension of different types of implicature. Despite lower scores in language ability in the target language, multilingual and bilectal children performed at rates comparable to the monolinguals with implicature. Regression analyses indicated a positive correlation between implicature, language proficiency, and age (but not executive control), albeit language ability did not affect implicature within multilinguals. We suggest an interpretation according to which multilingual, bilectal, and monolingual children maintain a comparable level of implicature understanding, but they do so by relying on different resources. Finally, a principal component analysis on different implicature types revealed a single factor of implicature performance. This outcome has implications for pragmatic theory.