Investigation of Layered Structure Formation in MgB2 Wires Produced by the Internal Mg Coating Process under Low and High Isostatic Pressures.

Currently, MgB2 wires made by the powder-in-tube (PIT) method are most often used in the construction and design of superconducting devices. In this work, we investigated the impact of heat treatment under both low and high isostatic pressures on the formation of a layered structure in PIT MgB2 wires manufactured using the Mg coating method. The microstructure, chemical composition, and density of the obtained superconductive wires were investigated using scanning electron microscopy (SEM) with an energy-dispersive X-ray spectroscopy (EDS) analyzer and optical microscopy with Kameram CMOS software (version 2.11.5.6). Transport measurements of critical parameters were made by using the Physical Property Measurement System (PPMS) for 100 mA and 19 Hz in a perpendicular magnetic field. We observed that the Mg coating method can significantly reduce the reactions of B with the Fe sheath. Moreover, the shape, uniformity, and continuity of the layered structure (cracks, gaps) depend on the homogeneity of the B layer before the synthesis reaction. Additionally, the formation of a layered structure depends on the annealing temperature (for Mg in the liquid or solid-state), isostatic pressure, type of boron, and density of layer B before the synthesis reaction.

Evaluation of psychiatrist's communication with psychosis patients / Evaluación de la comunicación de psiquiatras con pacientes psicóticos / Avaliação da comunicação de psiquiatras com pacientes psicóticos

Abstract: Evaluation of the physician-patient relationship is very important in determining priorities in medical practice and medicine. For this purpose, in this study the psychiatrist's communication with psychotic patients as a sensitive group was evaluated. A questionnaire was administered to 210 patients in a psychiatric clinic of Inonu University Hospital in Turkey to determine how the examination is performed in the facility for outpatients in the psychosis unit. According to the study conducted, it was observed that the evaluation score of the psychiatrist's communication with psychotic patients increased positively with increasing consultation duration. Our work is particularly noteworthy because it deals with a sensitive area, such as a group of psychiatric patients. The scores were obtained based on data from the evaluation of the questionnaires, which showed that the communication between the psychiatrist and the psychotic patient was conducted in a sensitive and careful manner, and without ethical problems.

Resumen: La evaluación de la relación médico-paciente es muy importante para determinar las prioridades en la práctica médica y la medicina. Para este propósito, en este estudio se evaluó la comunicación del médico psiquiatra con los pacientes psicóticos como grupo sensible. Se administró un cuestionario a 210 pacientes de una clínica psiquiátrica del Hospital de la Universidad de Inonu en Turquía, para determinar cómo se realiza el examen en el establecimiento para los pacientes externos de la unidad de psicosis. De acuerdo con el estudio realizado, se observó que el puntaje de evaluación de la comunicación del psiquiatra con los pacientes psicóticos se incrementó positivamente al aumentar la duración de la consulta. Nuestro trabajo se destaca particularmente por tratarse de un área sensible, como es un grupo de pacientes psiquiátricos. Los puntajes se obtuvieron basándose en datos de la evaluación de los cuestionarios, que mostraron que la comunicación entre el psiquiatra y el paciente psicótico se realizó de una forma sensible y cuidadosa, y sin problemas éticos.

Resumo: A avaliação da relação médico-paciente é muito importante para determinar as prioridades na prática médica e na medicina. Para este fim, neste estudo foi avaliada a comunicação do psiquiatra com pacientes psicóticos como um grupo sensível. Um questionário foi aplicado a 210 pacientes em uma clínica psiquiátrica do Hospital Universitário Inonu na Turquia para determinar como o exame é conduzido nas instalações para pacientes ambulatoriais da unidade de psicose. De acordo com o estudo realizado, observou-se que a pontuação da avaliação da comunicação do psiquiatra com pacientes psicóticos aumentou positivamente à medida que a duração da consulta aumentava. Nosso trabalho é particularmente notável porque trata de uma área sensível, tal como um grupo de pacientes psiquiátricos. Os resultados foram obtidos com base nos dados da avaliação dos questionários, que mostraram que a comunicação entre psiquiatra e paciente psicótico foi realizada de forma sensível e cuidadosa, e sem problemas éticos.

Influence of Amorphous Boron Grain Size, High Isostatic Pressure, Annealing Temperature, and Filling Density of Unreacted Material on Structure, Critical Parameters, N-Value, and Engineering Critical Current Density in Mgb2 Wires.

Our results show that a lower density of unreacted Mg + B material during an Mg solid-state synthesis reaction leads to a significant reduction in the quantity of the superconducting phase and lowers the homogeneity of the superconducting material. It also significantly reduces the irreversible magnetic field (Birr), critical temperature (Tc), upper magnetic field (Bc2), engineered critical current density (Jec), and n-value, despite high isostatic pressure (HIP) treatment and the use of nanoboron in the sample. Our measurements show that samples with large boron grains with an 8% higher density of unreacted Mg + B material allow better critical parameters to be achieved. Studies have shown that the density of unreacted material has little effect on Birr, Tc, Bc2, Jec, and the n-value for an Mg liquid-state synthesis reaction. The results show that the critical parameters during an Mg liquid-state synthesis reaction depend mainly on grain size. Nanoboron grains allow for the highest Birr, Tc, Bc2, Jec, and n-values. Scanning electron microscopy (SEM) images taken from the longitudinal sections of the wires show that the samples annealed under low isostatic pressure have a highly heterogeneous structure. High isostatic pressure heat treatment greatly improves the homogeneity of MgB2.

Monitoring spatiotemporal variations of diel radon concentrations in peatland and forest ecosystems based on neural network and regression models.

Concentrations of outdoor radon-222 ((222)Rn) in temperate grazed peatland and deciduous forest in northwestern Turkey were measured, compared, and modeled using artificial neural networks (ANNs) and multiple nonlinear regression (MNLR) models. The best-performing multilayer perceptron model selected out of 28 ANNs considerably enhanced accuracy metrics in emulating (222)Rn concentrations relative to the MNLR model. The two ecosystems had similar diel patterns with the lowest (222)Rn concentrations in the afternoon and the highest ones near dawn. Mean level (5.1 + 2.5 Bq m(-3) h(-1)) of (222)Rn in the forest was three times smaller than that (15.8 + 9.7 Bq m(-3)) of (222)Rn in the peatland. Mean (222)Rn level had negative and positive relationships with air temperature and relative humidity, respectively.