Measurements of the transport critical-current density (Jc), magnetization Jc, and magnetoresistance in a number bulk sintered samples Y1Ba2Cu3Ox from several different laboratories indicate that Jc is limited by weak-link regions between high regions. The has Josephson character, decreasing two orders magnitude as magnetic field increased 0.1 to 10 mT at 77 K. An examination grain-boundary region shows no observable impurities or second phases scale [001] lattice planes (∼12 Å). effect...

The dynamics of the magnetic properties polycrystalline RuSr2Gd1.5Ce0.5Cu2O10 (Ru-1222) have been studied by ac susceptibility and dc magnetization measurements, including relaxation ageing studies. Ru-1222 is a reported magneto-superconductor with Ru spins ordering at temperatures near 100 K superconductivity in Cu-O2 planes below Tc ~ 40 K. exact nature still debated no conclusion has reached yet. In this work, frequency-dependent cusp was observed vs. T which interpreted as spin glass...

In this paper we report on the magnetic properties of pure bulk ferromagnetic graphite, obtained by a chemical route previously described. This graphite has been vapor reaction consisting controlled etching structure. By force microscopy have verified that its are related to topographic defects introduced in pristine material. Also, through magnetization measurements as function temperature and applied field. At low temperatures $(2\phantom{\rule{0.3em}{0ex}}\mathrm{K})$ saturation reaches...

Purpose – The purpose of this paper is to present management techniques in the healthcare sector through lean office. Design/methodology/approach A case study approach adopted, with data collected Brazilian military organization. Findings findings identify several ways apply concepts outside manufacturing. From this, a future office health state design will be proposed. Research limitations/implications proposal has tested other organizations confirm study. While may limit generalization...

We have investigated the crystal structure and magnetic properties for polycrystalline samples of LaMn1−xFexO3+y, in whole range 0.0≤x≤1.0, prepared by solid state reaction air. All show ORT-2 orthorhombic that suppresses Jahn–Teller distortion, thus favoring a ferromagnetic (FM) superexchange interaction between Mn3+–O–Mn3+. For x=0.0 oxygen excess (y≈0.09) produces vacancies La Mn sites generates fraction around 18% Mn4+ ions 82% usual Mn3+ ions, with possible double-exchange them. The Fe...

We studied the magnetization as a function of temperature and magnetic field in compounds Nd0.5Sr0.5MnO3, Nd0.5Ca0.5MnO3, Sm0.5Ca0.5MnO3, Dy0.5Ca0.5MnO3 Ho0.5Ca0.5MnO3. Ferromagnetic, antiferromagnetic charge ordering transition our samples agreed with previous reports. The intrinsic moments Nd3+, Sm3+, Dy3+ Ho3+ ions experienced short range order at low temperatures. also did specific heat measurements applied fields between 0 9 T temperatures 2 30 K all five samples. Below 10 evidenced...

We have carried out a systematic magnetic relaxation study, measured after applying and switching off 5 T field to polycrystalline samples of ${\mathrm{La}}_{0.5}{\mathrm{Ca}}_{0.5}{\mathrm{MnO}}_{3}$ ${\mathrm{Nd}}_{0.5}{\mathrm{Sr}}_{0.5}{\mathrm{MnO}}_{3}.$ The long time logarithmic rate (LTLRR), decreased from 10 150 K increased 195 in ${\mathrm{La}}_{0.5}{\mathrm{Ca}}_{0.5}{\mathrm{MnO}}_{3}.$ This change behavior was found be related the complete suppression antiferromagnetic phase...

Complex relationships and dynamic environments challenge the management of global supply chains. This paper first reviews conceptual frameworks for managing along chains concepts coordination planning scheduling processes. On sequence, integrated production transportation problem an original equipment manufacturer is formulated as a mixed integer program. The program combines open flow shop vehicle routing problem. subsequent computational analysis shows that supports sustainable alignment...

The temperature of refrigerated products along the distribution process must be kept within close limits to ensure optimum food safety levels and high product quality. variation vehicle routing sequence is represented by non-linear functions. variability also correlated with time required for unit recover after cargo unloading, due discharging process. optimization methods employed in traditional problems are generally based on Travelling Salesman Problem objective minimizing travelled...

Structural, magnetic, and thermal measurements are carried out on the La0.67Ca0.33Mn1−xZnxO3 system with x=0.0–0.50. The structural characterization of samples is done by Rietveld analysis their neutron diffraction patterns. Zn substitutes at Mn site isostructurally until x=0.30. Oxygen content remains nearly invariant x. Magnetic as well electrical resistance show a para- to-ferromagnetic transition Tp, which decreases an increase For low concentration (until x=0.075) decrease dTp/dx...

Using Brillouin scattering we have studied the surfacelike generalized Lamb modes in Al films on NaCl. a theory which elastic constants (${C}_{\mathrm{ij}}$) of are taken from bulk values, reasonably good agreement is found for positions peaks. However, were unable to fit our experimental results obtain ${C}_{\mathrm{ij}}$ independently, since different combinations lead similar spectra and dispersion curves. The changes brought about by varying each one investigated theoretically, but no...

The crystal structure and some magnetic properties were investigated for polycrystalline samples of LaMn1−xFexO3+y, prepared by solid-state reaction in air. All show the ORT-2 orthorhombic that suppresses Jahn–Teller distortion favors a ferromagnetic (FM) superexchange interaction between Mn3+–O–Mn3+. An evolution from fairly strong FM phase, x=0.0, to an antiferromagnetic (AFM) x=1.0, was observed. For intermediate Fe contents, mixed-phase state occurs, with gradual decrease (increase)...

Abstract Samples of nanostructured β -Ga wires were synthesized by a novel method metallic-flux nanonucleation. Several superconducting properties observed, revealing the stabilization weak-coupling type-II-like superconductor ( $${T}_{c}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mrow> <mml:mi>T</mml:mi> </mml:mrow> <mml:mi>c</mml:mi> </mml:msub> </mml:math> $$\approx $$ <mml:mo>≈</mml:mo> 6.2 K) with Ginzburg-Landau parameter $${\kappa }_{GL}$$...

We report on specific features of the dielectric and magnetic properties as well magnetoelectric coupling coefficients (αME) La0.7Ba0.3MnO3 (L)-BaTiO3 (B) 2–2 type ceramic composite. The powder L B was synthesized by two different methods (solid state reaction Pechini). Orthorhombic tetragonal phases were observed for separated composite, respectively, both synthesis methods. characteristics grain size interfacial interdiffusion in L–B–L composite obtained method studied, showing that...

Purpose The objective of this paper is to evaluate whether the data from consignors, logistics service providers (LSPs) and consignees contribute prediction air transport shipment delays in a machine learning application. Design/methodology/approach research database contained 2,244 freight intercontinental shipments 4 automotive production plants Latin America. Different algorithm classes were tested knowledge discovery databases (KDD) process: support vector (SVM), random forest (RF),...

Room-temperature X- and Q-band ESR spectra of the high-${T}_{c}$ superconductor ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{x}}$ semiconductors ${\mathrm{Y}}_{2}$${\mathrm{BaCuO}}_{5}$ ${\mathrm{BaCuO}}_{2+\mathrm{x}}$ are studied experimentally theoretically by measuring, calculating, fitting powder corresponding to an anisotropic Zeeman Hamiltonian for ${\mathrm{Cu}}^{2+}$ in orthorhombic tetragonal local symmetries. x-ray studies their...

The magnetic and superconducting properties of RuSr2Gd1.5Ce0.5Cu2O10-x polycrystalline samples with different oxygen doping level are presented. A strong suppression the temperature (Tc), as well a reduction in fraction, occurs content is reduced by annealing deprived atmospheres. Drastic changes electrical resistivity observed above Tc, possibly associated removal mainly from grain boundaries. However, ordering relatively less affected samples. spin glass transition enhanced shifted to...

As plataformas logísticas são empreendimentos logísticos de grande porte que atendem a uma área ou região, onde se concentram e realizam-se atividades voltadas produção, transportes, logística distribuição mercadorias, utilizando-se mesma base serviços os diferentes atores envolvidos relacionam com objetivo obter maior eficiência em suas operações. Esta pesquisa teve como identificar atributos elementos podem ser aplicados à governança das logísticas. Para atingir o deste trabalho, foi...