An Hourglass-Type Spinal Schwannoma Spreading to the Chest Treated with One-Stage Total Removal through Posterior Paravertebral Approach without Opening the Pleural Cavity (Clinical Observation)

The article describes the treatment of a 20-year-old patient with a spinal hourglass schwannoma (neurinoma) in the thoracic spine, growing from the right Th3 spinal root, spreading into the thoracic cavity and compressing the apex of the right lung. The introduction presents the frequency of occurrence of such neoplasms among all spinal cord tumors. Complaints, neurological symptoms, neoplasm diagnosis methods and its clinical and radiological manifestations are presented. The article describes stages and techniques of total surgical removal of the spinal hourglass schwannoma through the posterior paravertebral minimally invasive approach without opening the pleural cavity and with using neurophysiological monitoring of spinal cord function performed at the Neurosurgical Clinic of the Novosibirsk Research Institute of Traumatology and Orthopaedics named after Ya.L. Tsivyan. The data  of histological examination and MRI control in the early postoperative period are presented. The follow-up was carried out at 6 and 12 months after surgical treatment. The publications describing the surgical treatment of paravertebral tumors through different approaches, the technique of their removal, possible complications and methods of their prevention are analyzed, and the classification according to Eden (1941), which characterizes the type of tumor growth, is presented

Method for predicting the quality of steel wire zinc coating

Бузунов Евгений Геннадьевич, аспирант кафедры технологий, сертификации и сервиса автомобилей, Магнитогорский государственный технический университет им. Г.И. Носова. E-mail: [email protected] Buzunov Evgeny Gennadievich, post-graduate student of the Automobile Technology, Certification and Service department, G.I.Nosov Magnitogorsk State Technical University. E-mail: [email protected] Мезин Игорь Юрьевич, доктор технических наук, профессор кафедры технологий, сертификации и сервиса автомобилей, Магнитогорский государственный технический университет им. Г.И. Носова. E-mail: [email protected] Mezin Igor Yurievich, doctor of engineering science, professor of the Automobile Technology, Certification and Service department, G.I.Nosov Magnitogorsk State Technical University. E-mail: [email protected] Зотов Сергей Владимирович, кандидат технических наук, доцент кафедры технологий, сертификации и сервиса автомобилей, Магнитогорский государственный технический университет им. Г.И. Носова. E-mail: zotov_tssa@mai l .ru Zotov Sergey Vladimirovich, candidate of engineering science, associate professor of the Automobile Technology, Certification and Service department, G.I. Nosov Magnitogorsk State Technical University. E-mail: [email protected]Дано описание разработанной методики прогнозирования качества покрытия оцинкованной проволоки. С использованием статистических моделей найдены рациональные пределы содержания основных химических элементов в стальной заготовке. На основе геометрии конструктивных фракталов произведено математическое моделирование процесса формирования структуры цинкового покрытия. Установлены зависимости толщины железоцинковых фаз покрытия от времени погружения проволоки в расплав, позволяющие прогнозировать свойства покрытия. Данная методика позволяет устанавливать рациональную скорость движения проволоки в агрегате горячего цинкования и получать покрытия требуемого уровня качества. The article describes the concept of developed methods for predicting of steel wire zinc coating quality. Using statistical models rational limits of chemical elements content in the steel wire are found. Based on the geometry of fractals, mathematical modeling of the structure of the zinc coating formation was carried out. Dependence of the thickness of zinc-iron phases in the coating on the time of steel wire hot-dip galvanizing was ascertained. This method allows to find rational steel wire moving speed in hot-dip galvanizing unit and obtain the required level of quality.Магнитогорский государственный технический университет им. Г.И. Носов