RESUMO
The fusion power density produced in a tokamak is proportional to its magnetic field strength to the fourth power. Second-generation high temperature superconductor (2G HTS) wires demonstrate remarkable engineering current density (averaged over the full wire), JE, at very high magnetic fields, driving progress in fusion and other applications. The key challenge for HTS wires has been to offer an acceptable combination of high and consistent superconducting performance in high magnetic fields, high volume supply, and low price. Here we report a very high and reproducible JE in practical HTS wires based on a simple YBa2Cu3O7 (YBCO) superconductor formulation with Y2O3 nanoparticles, which have been delivered in just nine months to a commercial fusion customer in the largest-volume order the HTS industry has seen to date. We demonstrate a novel YBCO superconductor formulation without the c-axis correlated nano-columnar defects that are widely believed to be prerequisite for high in-field performance. The simplicity of this new formulation allows robust and scalable manufacturing, providing, for the first time, large volumes of consistently high performance wire, and the economies of scale necessary to lower HTS wire prices to a level acceptable for fusion and ultimately for the widespread commercial adoption of HTS.
RESUMO
Fragments of bone tissue of the temporal bone, obtained during reconstructive-sanitizing operations in patients with chronic purulent otitis media, were studied by light and electron microscopy. An analysis was made of the degree of structural changes in bone tissue in chronic inflammation at the cellular and tissue levels after a histomorphological study in microwave decalcification. The method of diagnosis reliably allowed to differentiate the diseases characterized by the rarefaction of bone tissue, due to chronic inflammation, and also to determine the processes of transformation of bone tissue. The method of diagnosis reliably allows to differentiate diseases characterized by the rarefaction of bone tissue due to chronic inflammation, as well as to determine the processes of bone tissue transformation, however, the study is time-consuming, long-lasting and expensive.
Assuntos
Otite Média Supurativa , Otite Média , Doença Crônica , Humanos , Inflamação , Otite Média Supurativa/patologia , Osso TemporalRESUMO
Background. Breast carcinoma is the most common malignancy in women worldwide. It is most commonly associated with metastases to the liver, lung, bone, and the brain. Invasive lobular carcinoma is a less common pathology with slightly higher metastases to the upper gastrointestinal tract. Invasive lobular carcinoma metastasis to the gallbladder is extremely rare. Method. In this paper we are presenting a case of a 67-year-old female with metastases of invasive lobular breast cancer to the gallbladder six years after her therapy. Conclusion. This case clearly signifies the nature of the micrometastatic foci of the invasive lobular carcinoma even many years after a successful treatment.
RESUMO
The authors defined a radioactive waste neutralization and disposal site as a complex of industrial chambers with used territory of ground with burial places, buffer sanitary protection zone and observation zone. This area is a complicated geotechnical zone where natural communities develop under chronic exposure to natural and artificial radionuclides coming from both global and technogenic sources. Using geoinformative technologies of radioecologic safety, the authors evaluated protective functions of buffer zone, its biopotential and stability to specific type of nature management. The studies helped to identify sorption and migration capacity of the territory.
