bluuebunny/crossref_metadata_2025 huggingface dataset:
Les bas fourneaux de réduction du fer (Ier s. av. J.-C.) des Martys (Aude, France). Note additionnelle à Martys 2
Authors: Domergue Claude
Published: March 2019

Dans l’établissement sidérurgique romain des Martys (Ier s. av. J.-C.), plusieurs circonstances ont interféré lors de la conception du bas fourneau qui deviendra classique sur le site et dans les environs. Certaines d’entre elles ont déjà été évoquées dans l’ouvrage Martys 2, qui vient d’être publié (2016) dans les Suppléments de la RAN : le rôle des Italiens, l’impact de l’environnement lointain (les fourneaux celtes de grand format ?) et immédiat (les boules de granite du site). Nous les rappelons ici avant de nous attarder sur un élément nouveau du système de ventilation, qui révèle l’influence des sidérurgistes ibères et qui justifie la publication de cette note additionnelle.
Notes de Numismatique Narbonnaise IX.343. Les monnaies de l’oppidum de Serre de Brienne à Brignon (Gard)
Authors: Gentric Gisèle , Richard Jean-Claude Michel , Granet Isabelle , Sauvajol Jean , Souq François
Published: March 2019

L’oppidum de Serre de Brienne à Brignon (Gard) a été occupé à partir du Ve s. av. n. è. avec un fort développement au Ier s. av. n. è., jusqu’au IIe s. de notre ère. Il fait certainement partie des oppida ignobilia dont parle Pline. Les 553 monnaies qui constituent ce catalogue proviennent de récoltes de surface faites par J. Sauvajol et des fouilles menées par F. Souq. 80 % des monnaies de ce corpus appartiennent à la période pré-augustéenne ; les monnaies de Marseille représentent 60 % de l’ensemble, suivies des monnaies de Nîmes et des Volques Arécomiques (22 %). La période augustéenne (9 %) est représentée principalement par les as de Nîmes. Les monnaies impériales sont des monnaies du haut Empire, avec quelques monnaies du bas Empire ; enfin quelques monnaies médiévales et modernes sont les témoins de passages ultérieurs.
Diastereo- and enantioselective preparation of cyclopropanol derivatives
Authors: Simaan Marwan , Marek Ilan
Published: March 2019

The diastereoselective carbocupration reaction of alkoxy-functionalized cyclopropene derivatives, followed by a subsequent trapping of the resulting cyclopropylmetal species with an electrophilic source of oxygen (oxenoid) afforded various tetrasubstituted cyclopropanol derivatives in high diastereo- and enantiomeric ratios. Similarly, the enantioselective copper-catalyzed carbomagnesiation/oxidation (or amination) sequence on achiral nonfunctionalized cyclopropenes provided the desired cyclopropanol (and cyclopropylamine) derivatives in excellent diastereo- and enantiomeric excesses.
On containment and syncretism in English preterites and participles
Authors: Adamson Luke
Published: March 2019

This study explores Bobaljik’s (2012) suggestion that in English, the feature representation of the preterite contains the representation of the past participle. While containment analyses in both Distributed Morphology (DM) and Nanosyntax capture the virtual absence of ABA patterns of syncretism for the order BASE-PARTICIPLE-PRETERITE, I demonstrate that they face empirical challenges when the exponence of the suffixes is considered. After evaluating an alternative feature decomposition, I show how a DM containment approach can derive the facts for both base and suffix alternations with the aid of impoverishment, which also helps to explain counterexamples to *ABA in this domain. Lastly, I offer cautionary discussion about the relationship between containment structures and deriving *ABA.
DEVELOPMENT AND VALIDATION OF STRUCTURAL MODELS OF HUMAN POSTURE
Authors: Barauskas R. , Krušinskiene R.
Published: March 2019

A time law of small vibrations of the center of pressure (COP) of humans in standing position (human posture) provides a useful information about the physical and health condition of an individual. In this work controlled inverted pendulum (CIP) model with a single degree of freedom (DOF) is used in order to simulate the vibration of COP of a human body in anterio‐posteriori (forward‐backward) direction during still standing. A method for identification of the CIP model parameters is based on numerical computation of the sensitivities of the penalty‐type error function to small variations of model parameters. The approach is applicable to structural models with any number of DOF and any structural complexity. Numerical example demonstrates the model parameter identification results providing nearly the best match of the model behaviour to the real experimental record of COP position.
MATHEMATICAL MODELLING OF MULTIWAVE VOLUME FREE ELECTRON LASER: BASIC PRINCIPLES AND NUMERICAL EXPERIMENTS
Authors: Batrakov K. , Sytova S.
Published: March 2019

This contribution is devoted to investigation of multiwave Volume Free Electron Laser (VFEL) by methods of mathematical modelling. Special emphasis is placed on consideration of three‐wave VFEL. Mathematical modelling carried out confirmed some preliminary physical estimates. Computer code VOLC for simulation of different schemes of two‐ and three‐wave VFEL is described. Key words: free electron laser, quasi‐Cherenkov instability, simulation, nonlinear integro‐differential system.
GENERAL CONVOLUTIONS OF INTEGRAL TRANSFORMS AND THEIR APPLICATION TO ODE AND PDE PROBLEMS
Authors: Britvina L. E.
Published: March 2019

The present research is devoted to some polyconvolutions generated by various integral transforms. For example, we study convolutions of the Hankel transform with the following factorization properties:

where Hv[f] (x) is the Hankel transform. Conditions for the existence of the constructed polyconvolutions are found. The results of this research are applied for solvability of ODEs and PDEs by the method of integral transforms. The derived constructions allow us to solve various nonuniform equations.
ON THE POPULATION MODEL WITH A SINE FUNCTION
Authors: Bula I. , Vintere A.
Published: March 2019

In the interval [0,1] function sr(x) = r sin πx behaves similar to logistic function h μ (x) = μx(1‐ x). We prove that for every r > there exists subset ? ⊂ [0,1] such that sr : ? → ? is a chaotic function. Since the logistic function is chaotic in another subset of [0,1] but both functions have similar graphs in [0,1] we conclude that it can lead to errors in practice.
APPROXIMATE SOURCE CONDITIONS IN TIKHONOV REGULARIZATION‐NEW ANALYTICAL RESULTS AND SOME NUMERICAL STUDIES
Authors: Hofmann B. , Düvelmeyer D. , Krumbiegel K.
Published: March 2019

We present some new ideas and results for finding convergence rates in Tikhonov regularization for ill‐posed linear inverse problems with compact and non‐compact forward operators based on the consideration of approximate source conditions and corresponding distance functions. The new results and studies complement and extend in numerous points the recent papers [5, 7, 8, 10] that also exploit the distance functions originally introduced in [2] which measure the violation of a moderate source condition that works as a benchmark. In this context, we distinguish as in [8] logarithmic, power and exponential decay rates for the distance functions and their consequences. Under specific range inclusions the decay rate of distance functions is verified explicitly, whereas in [10] this result is also used but formulated only in an implicit manner. Applications to non‐compact multiplication operators are briefly reviewed from [8]. An important new result is that we can show for compact operators a one‐to‐one correspondence between the maximal power type decay rates for the distance functions and maximal exponents of Holder rates in Tikhonov regularization linked by the specific singular value expansion of the solution element. Some numerical studies on simple integration illustrate the compact operator case and the specific situation of discretized problems. Finally, some ideas of generalization are mentioned concerning the fact that the benchmark of the distance function can be shifted.
GENERALIZED EULER‐KNOPP METHOD AND CONVERGENCE ACCELERATION
Authors: Meronen O. , Tammeraid I.
Published: March 2019

New propositions on λ‐boundedness for generalized Euler‐Knopp method of summability (ϵ, T), where ? is a linear bounded operator from Banach space X into X, are proved. Using these results are verified a proposition on convergence acceleration by (ϵ, T) and a Tauberian remainder theorem for (ϵ,T).
A WIN-WIN STRATEGY FOR AN INTEGRATED VENDOR‐BUYER DETERIORATING INVENTORY SYSTEM
Authors: Yang P. C.
Published: March 2019

An integrated approach considering the view of both the buyer and the vendor is discussed in this study. It can be shown numerically that the integrated approach results in an impressive cost reduction when compared with an independent decision approach by the buyer. Although the integrated total cost decreases, the buyer's cost increases due to larger orders. To entice the buyer to accept larger order quantity, a permissible delay in payment is offered by the vendor to the buyer. A negotiation factor is also incorporated to share the benefits.
CONNECTION COEFFICIENTS OF SHANNON WAVELETS
Authors: Cattani C.
Published: March 2019

In this paper the differential properties of Shannon wavelets are investigated. The connection coefficients of Shannon wavelets are explicitly computed with a finite formula up to any order.
IDENTIFICATION OF A NONLINEAR POLYNOMIAL COMPARTMENTAL SYSTEM OF (Α + Β) ORDER BY A LINEARIZATION METHOD
Authors: Hebri B. , Cherruault Y.
Published: March 2019

A linearization method is used for identifying a nonlinear polynomial compartmental system of (α + β) order. We bring back the nonlinear model to a linear one for which a method, developed for Michaelis‐Menten systems in a previous paper, can be used.
SCALING GROUP OF TRANSFORMATIONS FOR BOUNDARY LAYER STAGNATION‐POINT FLOW THROUGH A POROUS MEDIUM TOWARDS A HEATED STRETCHING SHEET
Authors: Layek G. C. , Mukhopadhyay S. , Samad SK. A.
Published: March 2019

An analysis is performed to investigate the structure of the boundary layer stagnation‐point flow and heat transfer of a fluid through a porous medium over a stretching sheet. A scaling group of transformations is applied to get the invariants. Using the invariants, a third and a second order ordinary differential equations corresponding to the momentum and energy equations are obtained respectively. The equations are then solved numerically. It is found that the horizontal velocity increases with the increasing value of the ratio of the free stream velocity (ax) and the stretching velocity (ax). The temperature decreases in this case. At a particular point of the stretching sheet, the fluid velocity decreases or increases with the increase of the permeability of the porous medium when the free stream velocity is less or grater than the stretching velocity.
ENTIRE SOLUTIONS OF SCHRÖDINGER ELLIPTIC SYSTEMS WITH DISCONTINUOUS NONLINEARITY AND SIGN‐CHANGING POTENTIAL
Authors: Dinu T. L.
Published: March 2019

We establish the existence of an entire solution for a class of stationary Schrodinger systems with subcritical discontinuous nonlinearities and lower bounded potentials that blow‐up at infinity. The proof is based on the critical point theory in the sense of Clarke and we apply the Mountain Pass Lemma for locally Lipschitz functionals. Our result generalizes in a nonsmooth framework the result of Rabinowitz [16] on the existence of entire solutions of the nonlinear Schrodinger equation.
CAUCHY PROBLEM FOR A LINEAR HYPERBOLIC EQUATION OF THE SECOND ORDER
Authors: Korzyuk V. I. , Cheb E.S.
Published: March 2019

The definition of hyperbolic equation by a prescribed vector field is introduced for linear differential equation of the second order. The Cauchy problem with prescribed boundary conditions is considered for such equations. The theorems of existence and uniqueness of a strong solution to the given problem are proved by the method of energy inequalities and mollifiers with variable step. Key words: hyperbolic equation, Cauchy problem, strong solution, energy inequality, mollifiers.
MATHEMATICAL MODELLING DRIVEN BY TWO INDUSTRIAL APPLICATIONS: A MOVING‐BOUNDARY APPROACH
Authors: Narimanyan A. , Muntean A.
Published: March 2019

This note emphasizes the application of the moving‐boundary methodology in the modelling of two processes of particular industrial relevance. The first model explains the application of the Stefan and Signorini type boundary conditions in the modelling of the thermal cutting of metals by a plasma beam, while the second model shows how interface kinetic conditions, employed within the framework of a two‐phase Stefan‐like model, can describe the dynamics of an aggressive reaction front in concrete‐based materials. Our formulations provide a conceptually new approach towards the understanding of the involved physical processes. The connection between the two models is discussed as well. It relies on the presence of non‐equilibrium conditions driving the moving interface.
CERTAIN ISOMETRIES RELATED TO THE BILATERAL LAPLACE TRANSFORM
Authors: Yakubovich S. B.
Published: March 2019

We study certain isometries between Hilbert spaces, which are generated by the bilateral Laplace transform

In particular, we construct an analog of the Bargmann‐Fock type reproducing kernel Hilbert space related to this transformation. It is shown that under some integra‐bility conditions on $ the Laplace transform FF(z), z = x + iy is an entire function belonging to this space. The corresponding isometrical identities, representations of norms, analogs of the Paley‐Wiener and Plancherel's theorems are established. As an application this approach drives us to a different type of real inversion formulas for the bilateral Laplace transform in the mean convergence sense.
VORTICES ON A SPHERE
Authors: Alobaidi G. , Haslam M. C. , Mallier R.
Published: March 2019

We consider flows on a spherical surface and use a streamfunction formulation to derive a nonlinear equation governing steady-state flows in that geometry. We present some new vortex solutions to this equation.
ROBUST NUMERICAL METHODS FOR BOUNDARY‐LAYER EQUATIONS FOR A MODEL PROBLEM OF FLOW OVER A SYMMETRIC CURVED SURFACE
Authors: Ansari A. R. , Hossain B. , Koren B. , Shishkin G. I.
Published: March 2019

We investigate the model problem of flow of a viscous incompressible fluid past a symmetric curved surface when the flow is parallel to its axis. This problem is known to exhibit boundary layers. Also the problem does not have solutions in closed form, it is modelled by boundary‐layer equations. Using a self‐similar approach based on a Blasius series expansion (up to three terms), the boundary‐layer equations can be reduced to a Blasius‐type problem consisting of a system of eight third‐order ordinary differential equations on a semi‐infinite interval. Numerical methods need to be employed to attain the solutions of these equations and their derivatives, which are required for the computation of the velocity components, on a finite domain with accuracy independent of the viscosity v, which can take arbitrary values from the interval (0,1]. To construct a robust numerical method we reduce the original problem on a semi‐infinite axis to a problem on the finite interval [0, K], where K = K(N) = ln N. Employing numerical experiments we justify that the constructed numerical method is parameter robust.
THE POWER EXPANSIONS OF THE SOLUTIONS OF THE FIRST PAINLEVÉ HIERARCHY
Authors: Grigor'ev A. A. , Gromak V. I.
Published: March 2019

In this paper we consider a hierarchy of the first Painlevé equation's higher order analogues. For these equations three types of power expansions, i.e. holomorphic, polar and asymptotic are found. As an example the equation of the fourth order is considered.
MULTIPLE SOLUTIONS OF NONLINEAR BOUNDARY VALUE PROBLEMS WITH OSCILLATORY SOLUTIONS
Authors: Ogorodnikova S. , Sadyrbaev F.
Published: March 2019

We consider two second order autonomous differential equations with critical points, which allow the detection of an exact number of solutions to the Dirichlet boundary value problem. Non‐autonomous equations with similar behaviour of solutions also are considered. Estimations from below of the number of solutions to the Dirichlet boundary value problem are given.
INVERSE PROBLEM TO DETERMINE DEGENERATE MEMORY KERNELS IN HEAT FLUX WITH THIRD KIND BOUNDARY CONDITIONS
Authors: Pais E. , Janno J.
Published: March 2019

An inverse problem to determine degenerate time‐ and space‐dependent relaxation kernels of internal energy and heat flux with third kind boundary conditions by means of temperature measurements is considered. Existence and uniqueness of a solution to the inverse problem are proved.
ANALYSIS OF UPWIND AND HIGH‐RESOLUTION SCHEMES FOR SOLVING CONVECTION DOMINATED PROBLEMS IN POROUS MEDIA
Authors: Starikovičius V. , Čiegis R.
Published: March 2019

The conservation laws governing the multiphase flows in porous media are often convection‐dominated and have a steep fronts that require accurate resolution. Standard discretization methods of the convection terms do not perform well for such problems. The main aim of this work is to analyze the use of upwind and high‐ resolution schemes in such cases. First, we use a first differential approximation method to perform a theoretical analysis of a standard upwind approximation and different time stepping schemes for the linear hyperbolic equations in 1‐ and 2D. Next, we present a popular approach to reduce the amount of numerical diffusion introduced by upwind approximation ‐ high‐resolution schemes. We compare our implementation of one of the recently proposed central‐upwind schemes against the upwind schemes on several test problems based on Buckley‐Leverett equation and discuss the results. Finally, a parallel version of central‐upwind scheme in 2D is presented. It was implemented using our C++ library of parallel arrays ‐ ParSol.
FUZZY MULTICRITERIA FOR DETERMINING REASONABLE ADJUSTMENT IN HOUSING
Authors: Méndez Luis Delgado , Ávila Consuelo Del Moral , Ávila Maria José Del Moral , Tapia García Juan Miguel , Palacios Ignacio Valverde , Espinosa Ignacio Valverde
Published: March 2019

Legislative initiatives regarding universal accessibility promote the elimination of architectural barriers. This is a positive measure as it aims to ensure equal rights and opportunities for disabled people, in accordance with the Convention on the Rights of Persons with Disabilities (United Nations, 2006). One of the challenges facing society today is the determination of reasonable accommodation, a concept that encompasses those necessary modifications and adjustments which do not impose a disproportionate burden. For this purpose, technical, economic and social aspects shall be taken into consideration, as required by legislation. This paper proposes reasonable accommodation in residential buildings, taking into account the different options for its attainment, by applying a multi-criteria analysis based on a wide range of objective indicators of three types: technical, social and economic. This proposal was one of the objectives of the R + D + i Project called “VIVable-From accessible housing to sustainable housing: The essence of reasonable accommodation”. From VIVable, the fuzzy multi-criteria assessment method for determining reasonable accommodation may be totally extrapolated to other uses. At the same time, the proposed method may also be extrapolated to other countries where basic requirements for universal accessibility in buildings and equal rights of persons with disabilities are standardized.
Effect of Rifabutin on the Pharmacokinetics of Oral Cabotegravir in Healthy Subjects
Authors: Ford Susan L , Lou Yu , Lewis Nicole , Kostapanos Michalis , D'Amico Ronald , Spreen William , Patel Parul
Published: March 2019

Background

Cabotegravir (CAB) is an integrase strand transfer inhibitor in development as a long-acting injectable formulation, with an oral formulation used during a safety lead-in period. Tuberculosis (TB)–HIV coinfection is common, often requiring simultaneous treatment. Rifabutin (RBT) is an alternative antimycobacterial agent for TB and a moderate inducer of cytochrome P450 and UDP-glucuronosyltransferase isoenzymes. This study evaluated the impact of RBT on the pharmacokinetics (PK) of oral CAB.

Methods

In this Phase I, single-centre, open-label, two-period, fixed-sequence, drug interaction study, subjects received oral CAB 30 mg once daily for 14 days in period 1, and oral CAB plus RBT 300 mg once daily for 14 days in period 2. Serial PK sampling was performed on days 14 and 28. Geometric least squares (GLS) mean ratios with associated 90% CIs were calculated to compare CAB non-compartmental PK parameters following CAB+RBT versus CAB alone. Safety was also assessed.

Results

A total of 15 male subjects were enrolled and 12 completed all treatments. Comparing CAB+RBT with CAB alone, the GLS mean ratios (90% CIs) for CAB area under the concentration–time curve from time zero to the end of the dosing interval (AUC0–τ), maximum observed plasma concentration (Cmax) and concentration at the end of the dosing interval (Cτ) were 0.79 (0.74, 0.83), 0.83 (0.76, 0.90) and 0.74 (0.70, 0.78), respectively. 11 subjects reported 24 adverse events (AEs); 22 were reported with CAB+RBT (3 drug-related) and 2 with CAB alone (not drug-related). All AEs resolved by study end.

Conclusions

RBT had a modest impact on plasma CAB exposure following oral coadministration, resulting in overall plasma CAB trough exposures above the 10 mg oral dose shown to maintain viral suppression in HIV-1-infected subjects. Oral CAB can be coadministered with RBT without dosage adjustment.
Potential of Using BIM for Improving Hong Kong's Construction Industry
Authors: Wan Allen , Zulu Sam , Khosrowshahi Fazard
Published: March 2019

Given sizable capital projects in Hong Kong are using BIM from January 2018 on and site safety continues to be a concern for the local construction stakeholders. It is timely to investigate the potential of using BIM for construction safety. This research reveals the potential of using BIM for site safety is strong (85% supported), indicating Hong Kong should engage specific projects to test effectiveness of using BIM for safety, including implementation of safety management system and/or process of risk assessment.
Reducing Query Processing Time for Non-Synonymous Materialized Queries With Differed Criteria
Authors: Chakraborty Sonali Ashish , Doshi Jyotika
Published: March 2019

Results of OLAP queries for strategic decision making are generated using warehouse data. For frequent queries, processing overhead increases as same results are generated by traversing through huge volume of warehouse data. Authors suggest saving time for frequent queries by storing them in a relational database referred as MQDB, along with its result and metadata information. Incremental updates for synonymous materialized queries are done using data marts. This article focusses on saving processing time for non-synonymous queries with differed criteria. Criteria is the query condition specified with ‘where' or a ‘having' clause apart from equijoin condition. Defined rules will determine if new results can be derived from existing stored results. If criteria of fired query are a subset of criteria in stored query, results are extracted from existing results using MINUS operation. When criteria are a superset of stored query criteria, new results are appended to existing results using the UNION operation.
PSK Method for Solving Mixed and Type-4 Intuitionistic Fuzzy Solid Transportation Problems
Authors: Kumar P. Senthil
Published: March 2019

In this article, the author categorises the solid transportation problem (STP) under uncertain environments. He formulates the mixed and fully intuitionistic fuzzy solid transportation problems (FIFSTPs) and utilizes the triangular intuitionistic fuzzy number (TIFN) to deal with uncertainty and hesitation. The PSK (P. Senthil Kumar) method for finding an intuitionistic fuzzy optimal solution for fully intuitionistic fuzzy transportation problem (FIFTP) is extended to solve the mixed and type-4 IFSTP and the optimal objective value of mixed and type-4 IFSTP is obtained in terms of triangular intuitionistic fuzzy number (TIFN). The main advantage of this method is that the optimal solution of mixed and type-4 IFSTP is obtained without using the basic feasible solution and the method of testing optimality. Moreover, the proposed method is computationally very simple and easy to understand. Finally, the procedure for the proposed method is illustrated with the help of numerical examples which is followed by graphical representation of the finding.
MCDM for Candidate Selection in E-Voting
Authors: Alguliyev Rasim , Aliguliyev Ramiz , Yusifov Farhad
Published: March 2019

E-voting is one of the most important components of e-democracy and forms the basis of a democratic governance system. Voting results always lead to a broad debate in terms of candidate selection and whether the candidate elected to a position is suitable for that position. At present, the selection of qualified personnel and their appointment to responsible positions in public administration is one of the topical issues. In this article is proposed an MCDM for selection of candidates in e-voting. Criteria for the candidates' selection are determined and the relation of each candidate to other candidates is assessed using a binary matrix. Candidate rating is calculated according to all criteria. A numerical experiment is provided for candidate evaluation on the base of the selected criteria and ranked according to the importance of the criteria. The proposed model allows selecting a candidate with competencies based on the criteria set out in the e-voting process and making more effective decisions.
Powder Bed Fusion of Biomedical Co-Cr-Mo and Ti-6Al-4V Alloys: Microstructure and Mechanical Properties
Authors: Santecchia Eleonora , Mengucci Paolo , Gatto Andrea , Bassoli Elena , Denti Lucia , Rutkowski Bogdan , Czyrska-Filemonowicz Aleksandra , Barucca Gianni
Published: March 2019

Powder bed fusion (PBF) is an additive manufacturing technique, which allows to build complex functional mechanical parts layer-by-layer, starting from a computer-aided design (CAD) model. PBF is particularly attractive for biomedical applications, where a high degree of individualization is required. In this work, the microstructure of two biomedical alloys, namely Co-Cr-Mo and Ti-6Al-4V, were studied by X-ray diffraction and electron microscopy techniques. Hardness and tensile tests were performed on the sintered parts.
Canadian seismograph operations - 1977
Authors: Shannon W E , Halliday R J , Lombardo F , Schieman D R J
Published: March 2019

During 1977 the Division of Seismology and Geothermal Studies of the Earth Physics Branch, Department of Energy, Mines and Resources operated or contracted the operation of 19 standard seismograph stations, 19 regional stations, 2 telemetered networks based at
Ottawa and Victoria, a medium aperture array at Yellowknife, a strong-motion seismograph network on the West Coast and several special or temporary seismographs . This report gives the characteristics of the various systems and describes the format and availability of the recorded
data.
Spectra of discrete two-dimensional periodic Schrödinger operators with small potentials
Authors: Embree Mark , Fillman Jake
Published: March 2019

We show that the spectrum of a discrete two-dimensional periodic Schrödinger operator on a square lattice with a sufficiently small potential is an interval, provided the period is odd in at least one dimension. In general, we show that the spectrum may consist of at most two intervals and that a gap may only open at energy zero. This sharpens several results of Krüger and may be thought of as a discrete version of the Bethe–Sommerfeld conjecture. We also describe an application to the study of two-dimensional almost-periodic operators.
Euclides no vivió en Manhattan: Geometría urbana
Authors: Gómez Urgellés Joan Vicenç
Published: March 2019

Se presenta una experiéncia de una situación real de geometria urbana. La situación plantea a partir de un conjunto de puntos  del plano determinar las regiones de influenciaen de estos puntos. El problema consiste en encontrar los correspondientes diagramas de Voronoi pero con taxi geometria. La experiencia se realiza como proyecto de aula con alumnos de ingenieria informática de la EPSEVG-UPC
La carta de Smith y sus generalizaciones
Authors: Müller Andrei A. , Pérez-Peñalver M. Jose , Sanabria Codesal Esther
Published: March 2019

La carta de Smith es una de la herramienta clásica en ingeniería de microondas, fue presentada por Philip Hagar Smith en 1939. Esta carta está basada en la idea matemática de invertir el semiplano positivo al círculo unitario a través de la transformación de Moëbius $M(z)=\frac{z-1}{z+1}.$ Una de sus ventajas principales es que proporciona un excelente enfoque visual de los problemas de microondas, aunque también tiene algunos inconvenientes, como que no se pueden representar dentro de la carta los coeficientes de reflexión mayores que 1.

En 2011, A. A. Müller, P. Soto, D. Dascalu, D. Neculoiu y V. E. Boria propusieron una generalización de la carta de Smith en el espacio. En ella, los autores utilizan la proyección estereográfica de la esfera de Riemann en el plano. Este nuevo modelo unifica el diseño de los circuitos activos y pasivos con cualquier magnitud del coeficiente de reflexión del voltaje, manteniendo inalteradas todas las formas circulares del gráfico clásico de Smith. Además desarrollaron una herramienta CAD (www.3dsmithchart.com) para facilitar las mediciones y gráficos en esta carta.

Esta no es la única generalización que se puede hacer, en este trabajo presentamos otras posibilidades utilizando la geometría hiperbólica. Este tipo de geometría fue explorada por Escher en algunas de sus más conocidas ilustraciones.
The Racial Contours of YIMBY/NIMBY Bay Area Gentrification
Authors: McElroy Erin , Szeto Andrew
Published: March 2019

In this article, we trace the emergence of the false YIMBY/NIMBY dialectic now dominant in San Francisco housing rights discourse, studying its constitution and material effects. Specifically, we investigate how racial capitalism is constitutive of both YIMBYism and NIMBYism, drawing upon Cedric Robinson’s argument that racialization has always been constitutive of capitalism, and racism is requisite for capitalism’s endurance. We make our argument by drawing upon empirical research conducted by the Anti-Eviction Mapping Project (AEMP), a data analysis, oral history, and critical cartography collective of which we are both a part. We also draw upon collaborative research between AEMP and community-based housing rights nonprofits and local housing justice organizing efforts, as well as literary and cultural analysis. Such a methodological approach facilitates the unearthing of the racial logics undergirding YIMBYism, pointing to the need for alternative analytics to theorize and mobilize against heightened forms of racialized dispossession. We begin by outlining San Francisco’s YIMBY and NIMBY genealogies, and then proceed to unravel the basic statistical logic underpinning YIMBYism. In doing so, we introduce an additional analytic that we argue is requisite for deconstructing YIMBY algorithms: aesthetic desires of wealthy newcomers. We suggest that the YIMBY “build, baby, build” housing solution fails when architectural and neighborhood fantasies are taken into account. We then study how racialized surveillance informs not only the NIMBY but also the YIMBY gaze, arguing that both camps are ultimately tethered to racial capitalism’s liberal legacies.
E se o Supremo Tribunal Federal (STF) restabelecer a vigência da Convenção n. 158 da Organização Internacional do Trabalho (OIT) na ordem jurídica brasileira? Sobre uma possível reviravolta, pela via do direito internacional, das leis trabalhistas brasileiras
Authors: Borges Daniel Damasio
Published: March 2019

A Convenção n. 158 da OIT sobre o término da relação de emprego por iniciativa do empregador versa sobre um assunto particularmente polêmico: os limites à livre-iniciativa do empresário em nome da proteção do emprego. Essas discussões em torno do significado jurídico da Convenção n. 158 podem ser revividas com a conclusão do julgamento pelo STF da ação direta de inconstitucionalidade acerca da denúncia desse tratado internacional. Com efeito, perfila-se a formação de uma maioria no STF pela procedência da ação, o que poderá significar a reentrada em vigor da Convenção 158 na ordem jurídica brasileira. Nesse artigo, discutem-se quais seriam os efeitos jurídicos para as relações trabalhistas brasileiras decorrentes dessa reentrada em vigor. Para avaliar tais efeitos, fez-se uma revisão bibliográfica sobre o tema, com especial ênfase ao direito comparado, além de se recorrer aos relatórios dos órgãos da OIT que fiscalizam o cumprimento dessa convenção. Duas repercussões da Convenção 158 sobressaem: a) a afirmação do direito do empregado de apenas ser demitido por um motivo válido; e b) o direito dos empregados de terem os seus representantes consultados antes de serem efetuadas demissões coletivas. Este artigo procura, assim, esmiuçar de que modo esses dois direitos deveriam ser interpretados pelas jurisdições trabalhistas brasileiras, sublinhando a grande contribuição da Convenção n. 158 para uma proteção mais efetiva do emprego no direito do trabalho brasileiro.
Jurisdição internacional e as dificuldades de execução de sentenças internacionais no Brasil
Authors: Souza Nevitton Vieira
Published: March 2019

O presente artigo tem por objeto de análise as dificuldades observadas na execução de sentenças internacionais no Brasil, a partir da perspectiva do fenômeno da jurisdicionalização da sociedade internacional moderna. Ao ser verificado que o Brasil, atualmente, está vinculado à jurisdição internacional de seis tribunais e órgãos internacionais, o exame sobre os mecanismos domésticos de implementação das sentenças internacionais se evidencia, notadamente em razão do seu descumprimento resultar em nova responsabilização internacional do Estado. Constatou-se que à inexistência de normas especificas nessa matéria no ordenamento interno é somada a limitação excessiva dos projetos de leis-ponte, propostos perante o Congresso Nacional e analisados neste trabalho. Foi empregado o método dedutivo-comparativo, a partir de fontes bibliográficas e documentais indiretas.
Justiça de transição na Argentina e o Sistema Interamericano de Direitos Humanos: uma análise do Caso Luis Muiña (“regra 2x1”)
Authors: Meyer Emilio Peluso , Holl Jessica
Published: March 2019

Em 2017, a Suprema Corte de Justiça da Nação Argentina publicou a decisão referente ao caso Luis Muiña, que havia sido condenado pela prática de crimes contra a humanidade durante a ditadura argentina e pleiteava a aplicação da chamada “regra 2x1”. Essa regra consiste em um benefício processual que assegurava a contagem em dobro do período em que o detido ficasse em prisão cautelar, a partir do momento em que fossem completados dois anos de prisão. A Suprema Corte decidiu, em apertada maioria, pela aplicação do benefício. Contudo, nove dias após a publicação da decisão, foi aprovada pelo Congresso Nacional a Lei n. 27.362, que impede a aplicação da “regra 2x1” nos casos de crimes contra a humanidade. A partir desses fatos, o presente artigo objetiva discutir a inaplicabilidade de benefícios processuais, como a “regra 2x1”, em casos de crimes contra a humanidade, com base no entendimento da Corte Interamericana de Direitos Humanos e da Comissão Interamericana de Direitos Humanos. Para tanto, inicialmente são apresentados os principais aspectos do caso Luis Muiña; na sequência é traçado um panorama sobre o entendimento trazido pela Corte e pela Comissão Interamericana e, por fim, é trabalhada a importância de override e backlash no caso, para a efetivação da proteção aos direitos humanos.
A galáxia lex e a construção de um sistema jurídico transnacional
Authors: Maria Nunes Galvão Jéssyka , Nilsen Ribeiro Barza Eugênia Cristina
Published: March 2019

Em um mundo cada vez mais globalizado, os ordenamentos estatais não têm sido considerados como as únicas fontes de normatividade. A doutrina jurídica tem rechaçado cada vez mais a concepção dita westfaliana do direito, em que a exclusividade de produção normativa é da figura do Estado. Assim, têm-se no pluralismo jurídico e na transnacionalidade novas fontes de regulação que pretendem suprir os anseios dos setores sociais, que a cada dia especializam-se mais. Dessa onda de especialização proveniente da globalização surge o termo galáxia lex, que seria o conjunto de ordens transnacionais, aduzindo o presente estudo que tal galáxia possui a tendência de tornar-se global, no sentido de coesa e cooperativa para dirimir conflitos intersistêmicos. Com fulcro no método hipotético dedutivo e através de levantamento bibliográfico da melhor doutrina a respeito, propugna-se a urgência da construção de um ordenamento jurídico transnacional, a galáxia lex.
Dos povos nativos ao surgimento dos movimentos sociais: influências dos discursos jurídicos, religiosos e médicos para a construção do conceito de homossexualidade no Brasil
Authors: Silva Nogueira Barbosa Bruno Rafael , Antão de Medeiros Robson
Published: March 2019

O objetivo desse artigo é analisar historicamente os discursos jurídicos, religiosos e médicos a respeito da homossexualidade. Foi realizado um levantamento bibliográfico e documental sobre o tema objeto do estudo. Verificou-se que o estigma social direcionado a população LGBT+ na atualidade é produto de diferentes discursos direcionados a esses sujeitos ao longo da história. O discurso jurídico, religioso e médico foram fundamentais na construção desse estigma. Esses discursos servem muitas vezes de justificativa para a discriminação, preconceito e desumanização de pessoas LGBT+. O presente trabalho se mostra fundamental ao traçar uma breve cronologia do histórico da construção da identidade do “sujeito homossexual” desde a aceitação social dos povos nativos brasileiros, passando pelo pecado da sodomia e da criminalização penal com a chegada dos portugueses, da patologização até o surgimento dos movimentos sócias.
The influence of zinc-methionine bioplex supplementation to pregnant and lactating sheep on selected wool parameters
Authors: Wyrostek Anna , Kinal Stefania , Patkowska-Sokoła Bożena , Bodkowski Robert , Cholewińska Paulina , Czyż Katarzyna
Published: March 2019

Abstract. The most important nutrients affecting wool production
include sulfur amino acids, such as methionine, and minerals, such as zinc, and
their deficiency may cause wool production decrease. The aim of this study
was to evaluate an effect of zinc and methionine chelate addition on the
qualitative characteristics of Merino ewes wool and zinc content in wool
fibers and on their surface. Histological evaluation of fibers was also
performed. The study included 22 Polish Merino ewes divided into two
groups: control and experimental (0.4 g chelates daily per head). The
experiment lasted for 4 months (3.5 months of pregnancy and 2 weeks of early
lactation). The length, thickness and breaking force of wool fibers were
higher in the experimental group compared to the control group. Higher
content of zinc in wool of sheep from the experimental group was also
demonstrated. The histological structure of fibers from both groups did not
differ, as the content of zinc on their surface. It can be concluded on the
basis of the obtained results that the addition of chelates favorably
influenced the thickness compensation of wool fibers and amount of wool
obtained from sheep during pregnancy and early lactation, as well as
mechanical features of wool.
Secondary organic aerosol formation from photooxidation of furan:
effects of NOx and humidity
Authors: Jiang Xiaotong , Tsona Narcisse T. , Jia Long , Liu Shijie , Zhang Hailiang , Xu Yongfu , Du Lin
Published: March 2019

Abstract. Atmospheric furan is a primary and secondary pollutant in the atmosphere, and its emission contributes to the formation of ultrafine particles and ground-level ozone. We investigate the effects of NOx level and humidity on the formation of secondary organic aerosol (SOA) generated from the photooxidation of furan in the presence of NaCl seed particles. The particle mass concentration and size distribution were determined with a scanning mobility particle sizer (SMPS). SOA mass concentration and yield were determined under different NOx and humidity levels. A significant difference is observed both in the SOA mass concentration and SOA yield variation with the initial experimental conditions. Six organic products were identified in the collected SOA by electrospray ionization exactive orbitrap mass spectrometry (ESI-Exactive-Orbitrap MS). The –COOH, –OH, –C=O and NO2 functional groups were assigned in the FTIR spectra and used as the indicator for the mechanism inference. In addition, O3 formation was also observed during the furan-NOx-NaCl photooxidation. Based on the MS analysis, the reaction mechanism was proposed to follow the RO2+NO pathway. A significant amount of carbonyl-rich products was detected in the SOA products from the photooxidation of furan. The SOA mass concentration and yield increase with increasing humidity, because higher aerosol liquid water content brings more aqueous phase reactions. The present study demonstrates the effect of NOx and humidity on SOA formation during the furan-NOx-NaCl photooxidation. Furthermore, the results illustrate the importance of studying SOA formation over a comprehensive range of environmental conditions. Only such evaluations can induce meaningful SOA mechanisms to be implemented in air quality models.
Addition of a fast GC to SIFT-MS for analyses of individual
monoterpenes in mixtures
Authors: Lacko Michal , Wang Nijing , Sovová Kristýna , Pásztor Pavel , Španěl Patrik
Published: March 2019

Abstract. Soft chemical ionization mass spectrometry (SCI-MS) techniques can be used to accurately quantify volatile organic compounds (VOCs) in air in real time; however, differentiation of isomers still represents a challenge. A suitable pre-separation technique is thus needed, ideally capable of analyses in a few tens of seconds. To this end, a bespoke fast GC with an electrically heated 5 m long metallic capillary column was coupled to a selected ion flow tube mass spectrometry (SIFT-MS) instrument. To assess the performance of this combination a case study of monoterpene isomer (C10H16) analyses was carried out. The monoterpenes were quantified by SIFT-MS using H3O+ reagent ions (analyte ions C10H17+, m/z 137, and C6H9+, m/z 81) and NO+ reagent ions (analyte ions C10H16+, m/z 136, and C7H9+, m/z 93). The combinations of the fragment ion relative intensities obtained using H3O+ and NO+ were shown to be characteristic of the individual monoterpenes. Two non-polar GC columns (Restek Inc.) were tested: the advantage of MXT-1 was shorter retention times whilst the advantage of MXT-Volatiles was better temporal separation. Thus, it is possible to quantify components of a monoterpene mixture in less than 45 s by the MXT-1 column and to separate them in less 180 s by the MXT-Volatiles column. As an illustrative example, the headspace of three conifer needle samples was analysed by both reagent ions with both columns showing that mainly α-pinene, β-pinene and 3-carene were present.
SOBRECARGA E SATISFAÇÃO DOS FAMILIARES DE PACIENTES COM ESQUIZOFRENIA
Authors: Soares Marcos Hirata , Farinasso Adriano Luiz da Costa , Gonçalves Cristiane De Souza , Machado Fernanda Pâmela , Mariano Layla Karina Ferrari Ramos , Dos Santos Caroline Dominique
Published: March 2019

Objetivo: avaliar a atenção psicossocial pela ótica do familiar do paciente esquizofrênico.Metódo: estudo correlacional com 40 familiares no Centro de Atenção Psicossocial III de Londrina-PR, entre 2015 e 2016. Foram obtidas variáveis relacionadas à caracterização sociodemográfica e das escalas de avaliação da sobrecarga e de satisfação de familiares. Os dados foram analisados com medidas de tendência central e de correlação.Resultados: 24 cuidadores eram mulheres, 23 eram casados e a idade média foi 46 anos. A média de satisfação foi 4,37, a média global para a sobrecarga objetiva foi 2,26 e a sobrecarga subjetiva foi de 2,09.Conclusão: Embora muito satisfeitos, diferenças nos escores de sobrecarga revelaram que os familiares recebem bom suporte psicoeducativo, mas a sobrecarga gerada pela preocupação com o ente familiar é o aspecto que mais gera sorimento. Tais resultados podem nortear o enfermeiro no direcionamento das ações de suporte aos familiares, reduzindo a sobrecarga familiar.
Characteristics of Business Models, Business Diversification and Price Segmentation Strategies of Wineries in the Wine Route of Baja California, Mexico
Authors: Wu Jizhong , Cesaretti Sergio
Published: March 2019

This study examined the characteristics of business models used by wineries in Baja California, Mexico wine route. It also identified strategies being used regarding price segmentation and business diversification, and how business diversification relates to production performance. The results showed a limited presence in the supermarket channel, vineyard/land and wine-making facilities/machinery being considered as the most valuable resources, a growing tendency of companies having lodging facilities, a low differentiation in key activities performed, high differentiation regarding revenue generation structure, three revenue generation clusters containing the majority of the companies, companies with a diversification strategy outperformed those with single business strategies in regards to case production during a five year period, and the price segments from $251 to $600 Mexican pesos for 750ml bottles of wine being the most popular ones. This study used a non-random sampling technique to collect primary data in the form of surveys and face-to-face structured in-depth interviews. A total of 65 companies, accounting for approximately 55% of the total wine producers in the area, were interviewed during the data 1-month data collection period (July 2018). Out of these 65 companies, 50 provided complete useable data.
Carbonate Beach Sand of Abaiang Atoll, Kiribati: Geochemistry, Biogenic Sources, and Properties
Authors: Ellison Joanna C. , Han Paul , Lewis Trevor W.
Published: March 2019

Sandy beaches are critical resources for low-lying Pacific atoll communities, providing protection during storms, and land area for many coastal villages. Information on the nature of atoll beach sediment, its geochemistry and composition, can help to establish priorities to effectively protect the sources of Pacific island beach sediment. To understand sand sources, this study evaluated its physical characteristics including grain-size, geochemistry and composition, from windward and leeward beach profiles around Abaiang Atoll, Kiribati. Beach sand was >99% carbonate, averaging 37% coral fragments, 30% mollusc shells, 12% foraminifera, and 20% calcareous algae. Significant differences were found between reef and lagoonal sites in proportions of coral and mollusc fragments and foraminifera tests, with lagoon beaches having higher mollusc and coral proportions and lower foraminifera relative to reef beaches. This is attributed to high foraminiferal productivity offshore of reef beaches, and taphonomic durability of coral fragments in longshore drift into the lagoon. Mean sediment diameter increased from the upper to lower beaches at all sites, but fine sediment was lacking, attributed to its dissolution by rainfall and groundwater outflow. Geochemical analysis showed a mean of 84% Ca-Mg carbonates, of which 80% was calcium carbonate. There was no significant difference in the mean calcium percentage or calcium carbonate composition of the sediment between lagoon and reef beach sediment sources. Magnesium and magnesium carbonate content were significantly higher at reef sites relative to lagoon sites, attributed to higher proportions of foraminifera. Sediment-producing near shore habitats are critical to village protection through provision of beach sand, and this study shows the need to better conserve and manage coral reefs and habitats such as lagoon seagrass beds, to ensure continued atoll beach sand supply.