Influence of spatial resonant oscillations of the vibratory machine working organ on the technological load behaviour

"For raising the quality of operation of the vibratory technologic machines a precision of the treatment and assemblage of their constructions separate details and units has a particular importance. Specificity of elastic elements (especially of springs) – to oscillate not only in direction of the acting force but also in spatial (non-working) directions, is of no small importance. An attempt is made in the presented work to elaborate a common generalized dynamical model of the vibratory technologic machine, moving in the space due to above mentioned reasons. The following possible deviations are envisaged in the model: of treatment and assemblage of the machine; of interlocation of elastic elements with supporting surfaces; of transfer of the exciting force. Dynamical and mathematical models of spatial movement of the loaded vibratory technologic machine, considering above mentioned possible deviations, are elaborated. Numerical experiments of generation of non-working spatial vibrations and their influence on behaviour of the friable technologic load, are carried out. A part of the research results is presented in this work

Influence of spatial resonant oscillations of the vibratory machine working organ on the technological load behaviour

"For raising the quality of operation of the vibratory technologic machines a precision of the treatment and assemblage of their constructions separate details and units has a particular importance. Specificity of elastic elements (especially of springs) – to oscillate not only in direction of the acting force but also in spatial (non-working) directions, is of no small importance. An attempt is made in the presented work to elaborate a common generalized dynamical model of the vibratory technologic machine, moving in the space due to above mentioned reasons. The following possible deviations are envisaged in the model: of treatment and assemblage of the machine; of interlocation of elastic elements with supporting surfaces; of transfer of the exciting force. Dynamical and mathematical models of spatial movement of the loaded vibratory technologic machine, considering above mentioned possible deviations, are elaborated. Numerical experiments of generation of non-working spatial vibrations and their influence on behaviour of the friable technologic load, are carried out. A part of the research results is presented in this work

Coversenstvovanie eksplyatacionnyh sposobnostej koles i relsovyh pytej

The high cost of wheels and rails due to wear and rolling contact fatigue is one of the main problems in the railway transport. The values of creepage, sliding distance and wear rate of wheels and rails at rolling of a wheel on the rail greatly depend on geometric characteristics of working profiles of wheels and rails and location of wheels relative to rails. In the present work the functional requirements of various parts of profiles of wheels and rails and dominating kinds of their damage in various operating conditions are considered and a new profile of a wheel and device for fastening of rails are offered.Высокая стоимость ремонтно-профилактических работ колес, из-за износа и усталостного повреждения является одным из главных проблем на железодорожном транспорте. При качении колеса на рельсе величина относительного скольжения и интенсивность изнашивания колес и рельсов значительно зависят от геометрических особенностей рабочих профилей колес и рельсов и взаимного расположения рельсов относительно колес. В данной работе рассматриваются функциональные требования различных частей профилей колес и рельсов и доминирующие виды их повреждения при различных условиях работы и предложены новые профили колес и устройства закрепления рельсов

Улучшение условий работы ходовой части грузового локомотива

To improve the working conditions of the electric locomotive running part, it is necessary to decrease unsprung masses, lateral loads and the angle of attack and provide the third body with proper tribotechnical properties. A new scheme of the freight electric locomotive running gear is elaborated in the work, which ensures a decrease of unsprung masses, relative sliding of a wheel on the rail and an angle of attack that provides resistance to the destruction of the third body in the contact zone.Для улучшения условий работы ходовой части электровоза зону контакта колеса и рельса необходимо уменьшить необрессоренные массы, поперечные силы и угол атаки и обеспечить наличие третьего тела с необходимыми триботехническими свойствами. В работе приведена новая схема ходовой части грузового электровоза, которая позволяет уменьшить относительную скорость скольжения колеса по рельсу и угол атаки, что повышает устойчивость третьего тела к разрушению

Technology development of hyperthermic pressurized intraperitoneal aerosol chemotherapy (hPIPAC)

Background!#!Optimized drug delivery systems are needed for intraperitoneal chemotherapy. The aim of this study was to develop a technology for applying pressurized intraperitoneal aerosol chemotherapy (PIPAC) under hyperthermic conditions (hPIPAC).!##!Methods!#!This is an ex-vivo study in an inverted bovine urinary bladder (IBUB). Hyperthermia was established using a modified industry-standard device (Humigard). Two entry and one exit ports were placed. Warm-humid CO!##!Results!#!Therapeutic hyperthermia (target tissue temperature 41-43 °C) could be established and maintained over 30 min. In the first phase (insufflation phase), tissue hyperthermia was created by insufflating continuously warm-humid CO!##!Discussion!#!We introduce a simple and effective technology for hPIPAC. hPIPAC is feasible in an ex-vivo model by using a combination of industry-standard medical devices after modification. Potential pharmacological and biological advantages of hPIPAC over PIPAC should now be evaluated

Noise Pollution Level in Telavi

ხმაური სხვადასხვა სიხშირის და დონის ბგერების ერთიანობაა, რომელიც ხელს უშლის სასარგებლო ბგერითი სიგნალის აღქმას და იწვევს ადამიანის ორგანიზმზე არასასურველ, გამაღიზიანებელ მოქმედებას. ნაშრომში გამოკვლეულია ქალაქ თელავში ზაფხულისა და ზამთრის სეზონზე დროის ერთსა და იმავე საათებში ფონური ხმაურის დონეები, რის საფუძველზეც დადგინდა, რომ ქალაქ თელავში ფონური ხმაურის დონე არ აჭარბებს ნორმით დასაშვებ მაჩვენებელს. აქედან გამომდინარე, თელავი შეიძლება ჩაითვალოს საქართველოს ერთ-ერთ წყნარ და ტურისტებისათვის მიმზიდველ ქალაქად.Noise is a combination of sounds of different frequencies and levels, which interfere with the perception of useful sound signals and cause undesirable, irritating effects on the human body. The paper investigates background noise levels during the summer and winter seasons in Telavi, at the same time, and it is concluded that the background noise level in Telavi does not exceed the permissible standard. Therefore, Telavi can be considered as one of the quiet and attractive cities of Georgia for tourists