The aim of this paper is to emphasize the influence of the magnetization vector misalignment to the magnetic force. In this concrete example the force between permanent ring magnet and soft magnetic ...cylinder was analyzed. Configuration that can be seen in different devices that incorporate permanent magnets. Magnetic force between permanent ring magnet and soft magnetic cylinder is calculated using hybrid boundary element method and semi-analytical approach based on fictitious magnetization charges. By selecting the angle of the magnetization vector inclination, obtained expression can be used for the force calculation of axially or radially magnetized permanent magnet and magnetic body of finite dimension.
The hybrid boundary element method for solving a three-dimensional magnetostatic problem is presented in this paper for the first time. The interaction force between the cuboidal permanent magnet and ...the bar, made of soft magnetic material, is calculated. Results of the presented approach are confirmed using COMSOL Multiphysics as well as with the results of the image theorem that is applicable when the dimensions of the bar are large enough; so it could be considered an infinite soft magnetic plane.
Choristomas are small aggregates of normal tissue components in aberrant locations, and may be mistaken for true neoplasms. We report a case of an incidentally found mature cartilage island in the ...portal tract of a two-month old piglet. All other examined organs were normal. The pig belonged to the control group of animals in a short-term experiment, was fed with wheat and corn, and did not receive any external or internal treatment. To the best of our knowledge, this is the first case of a mature cartilaginous choristoma in pig liver.
This paper describes a modification of the Hybrid Boundary Element Method (HBEM) for electrostatic problems solving. Such improved method is applied for transmission lines analyses. By taking a ...quasi-static TEM approach, the Hybrid Boundary Element Method is applied to determine the effective relative permittivity and the characteristic impedance of different stripline structures. Comparisons with already published numerical results and software simulation have been also performed with an aim to test the validity of the proposed approach. A close results match can be noticed. The main novelties of the proposed HBEM modification are better accuracy and ability to determine the polarization charges distribution on the separating surface between a strip and a dielectric layer. This was not possible before, using the previous version of the method.
Through everyday care experiences, nurses develop expertise in recognition of capacity strain in hospital workplaces. Through qualitative interview, experienced nurses identify common activity ...changes and adaptive work strategies that may signal an imbalance between patient demand and service supply at the bedside. Activity change examples include nurse helping behaviors across patient assignments, increased volume of nurse calls from patient rooms, and decreased presence of staff at the nurses' station. Adaptive work strategies encompass actions taken to recruit resources, move work in time, reduce work demands, or reduce thoroughness of task performance. Nurses’ knowledge of perceptible signs of strain provides a foundation for future exploration and development of real-time indicators of capacity strain in hospital-based work systems.
•Under time pressure, RNs employ adaptive work strategies to sustain care delivery.•Nurses attend to observable workplace cues to maintain awareness of the presence of capacity strain in the hospital setting.•Nurse-identified signs of adaptation and strain may provide a foundation for future dynamic workplace indicators..
This research includes a simple and fast semi-analytical approach for magnetic interaction force calculations based on fictitious magnetization charges and the discretization technique. Two different ...examples are analyzed: (1) calculation of the interaction magnetic force between laterally displaced cylindrical permanent magnets made of the same magnetic material and magnetized uniformly along their axes of symmetry (opposite direction) and (2) determination of the attraction force between a "horseshoe" permanent magnet of circular cross-section and an infinite linear magnetic plane with relative magnetic permeability μ
r
. The results for the interaction magnetic force obtained by the proposed approach are compared with the finite-element method.
A separation mechanism of eight Co(III) complexes with ethylenediaminetetraacetate-type ligands belonging to two series during salting-out thin-layer chromatography on silica gel is investigated. The ...sorbent is impregnated with five poly(ethylene glycol)s with different molecular masses, and ammonium sulphate solutions are used as mobile phase. Additionally, on non-impregnated sorbent, mobile phases containing one of eight salts with ions of different lyotropic properties are used: kosmotropic Mg2+ accompanied with SO4
2- (kosmotrope), Cl− (border), NO3
− (chaotrope), ClO4
−(chaotrope), Cl− of Li+ (kosmotrope), Na+ (border), K+ (chaotrope) and NH4
+ (chaotrope). Salting-out and salting-in effects were observed depending on salt nature. The combined retention mechanism of specific H-bonding and nonspecific hydrophobic interactions is proposed.
PDF
