Development of techniques for the formation of a planar electric vacuum diode based on an array of CNTs synthesized at the edge of the Co-Nb-N-(O) film

This work shows the possibility of forming a planar diode structure based on carbon nanotubes formed on a catalytic alloy film Co-Nb-N-(O). The paper presents a technological route for the formation of a planar diode structure Si/SiO2/Si3N4/Co-Nb-N-(O)/SiO2 and studies the emission characteristics. The current-voltage characteristic of the obtained diode structure in the Fowler-Nordheim coordinates is close to linear in the range from 15 to 22 V, which confirms the phenomenon of electron emission.

A Comparison of Modern Heating Methods to Reduce a Heat Treaters CO2 Carbon Footprint

Several governments across the world have recently stepped up their action to fight climate change. Initiatives include from clean energy production to efficient buildings and reduced emissions from industry. The manufacturing industry will need to examine methods to reduce its carbon footprint, especially across energy-intensive sectors such as heat treatment. This paper explains and explores the latest developments in energy management in heat treatment with a specific focus on electrical heating and associated digital tools. In this paper, developments in IGBT (insulated-gate bipolar transistor) and SCR (silicon-controlled rectifier) technology will be compared as energy-efficient alternatives to variable reactance transformers (VRT’s) for electric vacuum furnaces.

The influence of process of manufacturing and heat treatment on performance and dimensional stability of the Cu—Ni—Si alloy

The possibilities of improving the properties and increasing the dimensional stability of material of the special Cu—Ni—Si alloy for the parts of electric vacuum microwave devices by the deformation and heat-treatment methods are analyzed.

Safety and efficacy of manual vacuum suction compared with conventional dilatation and sharp curettage and electric vacuum aspiration in surgical treatment of miscarriage: a randomized controlled trial

Background The World Health Organization does not recommend dilatation and sharp curettage (D&C) for the surgical treatment of miscarriage during the first trimester because this may cause Asherman’s syndrome due to endometrial damage; therefore, suction remains the primary treatment option. While manual vacuum aspiration (MVA) has been widely used since the 1990s outside Japan, the use of an MVA device (Women’s MVA system) was approved in Japan in October 2015. Here, we examined the efficacy of the MVA kit in women surgically treated for miscarriage. Methods This retrospective cohort study was conducted between 2014 and 2018 at the International University of Health and Welfare Hospital in Japan. Women who underwent surgical treatment for miscarriage within 12 weeks of pregnancy were identified and enrolled in the study. A total of 404 women were included who underwent the following procedures: 121 D&C, 123 electric vacuum aspiration (EVA), and 160 MVA. For each participant, the duration of surgery, amount of bleeding, amount of anesthetic used, incomplete abortion requiring repeat procedures, and intraoperative/postoperative complications were evaluated. Results The duration of surgery was 13.7 ± 7.2, 11.2 ± 4.2, and 6.9 ± 4.3 min in the D&C, EVA, and MVA groups, respectively (p = 1.00). The amount of anesthetic used was not significantly different among all groups. Bleeding of ≥ 100 mL was confirmed in three (2.4%), one (0.8%), and one (0.6%) patient(s) in the D&C, EVA, and MVA groups, respectively (p = 0.50). Incomplete abortion was identified in three (2.4%), two (1.6%), and one (0.6%) patient(s) in the D&C, EVA, and MVA groups, respectively (p = 0.61). However, severe intraoperative/postoperative complications were not observed in any group. Conclusions Surgical treatment for miscarriage performed using the MVA kit has safety and efficacy similar to those of conventional methods, such as D&C and EVA.