УДОСКОНАЛЕНИЙ МЕТОД ПОТЕНЦІЙНОЇ ФУНКЦІЇ ДЛЯ ФОРМУВАННЯ ОПТИМАЛЬНОЇ СТРУКТУРИ РОЗПОДІЛЬЧОЇ МЕРЕЖІ

The analysis of existing design techniques of systems of electrosupply is carried out. The advanced methodof equipotential surfaces is developed and comparison of the offered method with tensor a method is spent.Проведен анализ существующих методов проектирования систем электроснабжения. Разработан усовершенствованный метод эквипотенциальных поверхностей и выполнено сравнениепредложенного метода с тензорным методом.Проведено аналіз існуючих методів проектування систем електропостачання. Розроблено удосконалений метод еквіпотенційних поверхонь та виконано порівняння запропонованого методу з тензорним методом

An international survey on the pragmatic management of epistaxis

Epistaxis is one of the most common ear, nose and throat emergencies. The management of epistaxis has evolved significantly in recent years, including the use of nasal cautery and packs. However, a correct treatment requires the knowledge of nasal anatomy, potential risks, and complications of treatment. Epistaxis is often a simple and readily treatable condition, even though a significant bleed may have potentially severe consequences. At present, there are very few guidelines concerning this topic. The current Survey explored the pragmatic approach in managing epistaxis. A questionnaire, including 7 practical questions has been used. The current International Survey on epistaxis management reported a relevant prevalence (21.7%), mainly during childhood and senescence, an important hospitalization rate (11.8%), the common use of anterior packing and electrocoagulation, and the popular prescription of a vitamin supplement and intranasal creams

Method of Surgical Treatment of Chronic Dacryocystitis and Its Effectiveness in Monitoring Patients in the Early Postoperative Period

The aim. To develop a method for endonasal endoscopic dacryocystorhinostomy (EEDCR) and evaluate its effectiveness in monitoring patients in the early postoperative period. Materials and methods. The study group (1st group) consisted of 45 patients with chronic dacryocystitis (CD), who underwent EEDCR according to the developed method, the comparison group (2nd group) included 36 patients who, after performing the developed EEDCR, an implant was installed in the dacryorhinostoma zone. The control group (3rd group) included 28 patients who underwent EEDCR according to the generally accepted method. Patients of groups 1 and 2 were divided into 2 subgroups: 1A and 2A included patients who underwent computed tomography of the lacrimal ducts in the preoperative period according to the developed method, and patients of subgroups 1B and 2B – according to the traditional algorithm. Reliably the best results of restoring lacrimation function were in subgroups 1A and 1B already from the 3rd day of observation after surgery, as well as in the subsequent periods of observation. The worst values of lacrimation function were recorded in the control clinical group with a statistically significant difference from other groups (p<0.05). When comparing the results of treatment of subgroups 1A with 1B and 2A with 2B, the best indicators were observed in subgroups 1A and 2A, but due to the small sample of patients, statistical significance in the differences could not be achieved (p>0.05). Results. A method of EEDCR has been developed, a comparative analysis of groups of patients according to the above indicators has been performed when observing patients in the early postoperative period. On the first day after surgery, the mean score of the severity of lacrimation according to the Munk scale significantly decreased in all groups and gradually decreased on the 7th day and after 2 weeks (p<0.05). Significantly better indicators were in subgroups 1A and 1B in the entire early postoperative period (p<0.05). The degree of edema of the mucosa of the dacryorhinostoma zone and the middle nasal meatus at all periods of observation was the lowest in subgroup 1A from 3rd day and in each subsequent period of observation with a statistically significant difference from other groups (p<0.05). On the 7th day, significantly more patients with mucous discharge in the area of dacryorhinostoma and middle nasal meatus were observed in subgroup 2B and in 3rd group (p<0.05), and significantly better results were noted in subgroup 1A, where more than 2/3 patients had no mucous discharge. Reliably the best results of restoring lacrimation function were in subgroups 1A and 1B already from the 3rd day of observation after surgery, as well as in the subsequent periods of observation. The worst values of lacrimation function were recorded in the control clinical group with a statistically significant difference from other groups (p<0.05). When comparing the results of treatment of subgroups 1A with 1B and 2A with 2B, the best indicators were observed in subgroups 1A and 2A, but due to the small sample of patients, statistical significance in the differences could not be achieved (p>0.05). Conclusions. The developed EEDCR method complies with the principles of sparing surgery, is effective in the treatment of patients with CD, while there is a Faster rate of recovery of the lacrimal function and mucosa, improves the quality of life of patient

Primary damage to metals by synthesis neutrons

Translated from Russian (Report of the A.A. Baikov Inst. of Metallurgy, Moscow, 1997)Available from British Library Document Supply Centre-DSC:9023.190(VR-Trans--9147)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Physico-mathematical model of complex heat exchange between an electric infrared radiant heating panel and the environment

One of the main elements of heating systems is a heating device, whose construction is constantly being improved upon on thanks to the development of the science surrounding the materials’ physical and chemical properties of the working bodies, manufacturing and application technologies. This article is devoted to the development of a physical model of complex heat exchange between an electric infrared radiant heating panel based on an amorphous metallic radiating plate located in the middle of the panel and surrounding solids and air. The developed physical model is described by mathematical equations taking into account the boundary conditions of the third kind on the basis of complex heat exchange by radiation and convection both with surrounding solid bodies and passing airflow. The purpose of the solution is to determine the rational relation between the radiation and convective components of heat transfer, depending on the comfortable state of the person (observance of the technological process), and the operating modes of the heating system

УДОСКОНАЛЕНИЙ МЕТОД ПОТЕНЦІЙНОЇ ФУНКЦІЇ ДЛЯ ФОРМУВАННЯ ОПТИМАЛЬНОЇ СТРУКТУРИ РОЗПОДІЛЬЧОЇ МЕРЕЖІ

Проведено аналіз існуючих методів проектування систем електропостачання. Розроблено удосконалений метод еквіпотенційних поверхонь та виконано порівняння запропонованого методу з тензорним методом

УДОСКОНАЛЕНИЙ МЕТОД ПОТЕНЦІЙНОЇ ФУНКЦІЇ ДЛЯ ФОРМУВАННЯ ОПТИМАЛЬНОЇ СТРУКТУРИ РОЗПОДІЛЬЧОЇ МЕРЕЖІ

The analysis of existing design techniques of systems of electrosupply is carried out. The advanced methodof equipotential surfaces is developed and comparison of the offered method with tensor a method is spent.Проведен анализ существующих методов проектирования систем электроснабжения. Разработан усовершенствованный метод эквипотенциальных поверхностей и выполнено сравнениепредложенного метода с тензорным методом.Проведено аналіз існуючих методів проектування систем електропостачання. Розроблено удосконалений метод еквіпотенційних поверхонь та виконано порівняння запропонованого методу з тензорним методом

ЕКСПЕРИМЕНТАЛЬНЕ ДОСЛІДЖЕННЯ ЗНОСУ БАНДАЖІВ ЕЛЕКТРОВОЗІВ ВЛ11М З РІЗНИМИ ПРОФІЛЯМИ

The experimental research of the bandage wear has fun conducted concerning electric locomotive performance under the mountain conditions of the Lvov railway. The operation periods of an electric locomotive have been considered as for the various wheel profile structures.Проведены экспериментальные исследования износа бандажей электровоза в горных условиях Львовской дороги. Рассматривались периоды эксплуатации электровоза с различными профилями колес.Проведені експериментальні дослідження зносу бандажів електровоза в гірських умовах Львівської залізниці. Розглядались періоди експлуатації електровоза з різними профілями коліс.

ПОКАЗНИКИ ДИНАМІКИ ЕЛЕКТРОВОЗА ЧС4 ТА МІЦНОСТІ НЕСУЧИХ КОНСТРУКЦІЙ РАМ ВІЗКІВ ВИРОБНИЦТВА ХК «ЛУГАНСЬКТЕПЛОВОЗ»

Article is devoted to the results of dynamic tests, tests on the line and tests for durability of electric locomotive СS4 with bogies frames produced by HK «Luganskteplovoz». The received results of tests have shown, that the modernized electric locomotive corresponds to Normative parameters.В статье приведены результаты динамических ходовых прочностных испытаний электровоза ЧС-4 с рамами тележек производства ХК «Лугансктепловоз». Полученные результаты испытаний показали, что модернизированный электровоз соответствует Нормативным показателям.В статті наведено результати динамічних ходових міцносних випробувань електровозу ЧС4 з візками виробництва ХК «Луганськтепловоз». На підставі отриманих результатів випробувань зроблено висновки про відповідність електровоза нормативним показникам при його експлуатації у складі пасажирських поїздів зі швидкостями до 140 км/год. включно