Baigiamajame magistro darbe nagrinėjamos pneumatinių bei mechaninių aeravimo sistemų problemos, jų konstrukcijos. Taip pat išnagrinėti veiksniai įtakojantys aeratorių efektyvumą. Išnagrinėjus konstrukcijas pasirinkti 3 aeratoriai su kuriais atlikti eksperimentai bei įvertintas jų efektyvumas. Darbą sudaro 8 dalys: įvadas, tyrimo objektas ir problemos aprašymas, tiriamųjų aeravimo sistemų apžvalga bei konstrukcijų analizė, mechaninių ir pneumatinių aeravimo sistemų efektyvumo analizė, tyrimo metodika bei eksperimentinis stendas, tyrimo rezultatai, išvados, literatūros sąrašas. / The following masters work consists of the analyse of the pneumatic and mechanical aeration systems, these problems and construction. Also explored factors who does influence for the efficiency of the aerators. When the constructions were explored, 3 aerators were selected, the experiments was made and valuated the efficiency. There are 8 chapters: introduction, the object of the analys and description of the problem, review of the explored aeration systems and analys of the constructions, efficiency analysis of mechanical and pneumatic aeration systems, methodology of the analysis and case of the experiment, results of the analysis, conclusions and suggestions, the list of the literature.

After amputation possibilities of human body motion are very limited. Amputation usually changes inert characteristics of human body parts and asymmetry of gait is visible. After prosthetics, gait with prosthesis remains asymmetric in relation with impaired body balance control. Loss of proprioreception in amputated side reduces regulation of stance. To retrieve stance skills and to train body balance pneumatic prosthesis is usually applied. The aim of this investigation was to assess influence of pneumatic prosthesis to stance and walking characteristics. To achieve this aim there were two main objectives 1) to evaluate influence of pneumatic prosthesis to stance symmetry in early period of prosthetics; 2) to evaluate influence of pneumatic prosthesis to gait symmetry in early period of prosthetics. Investigation was conducted using computerised pedobarograph „Parotec System“. Changes of weight center position were analyzed at the beginning and the end of rehabilitation period, time characteristics of weight bearing phases were assessed, vertical force and index of gait asymmetry were calculated. Investigation was performed at the department of Physical medicine and rehabilitation of Joint-stock company „Ortopedijos technika“. Patients who underwent below knee amputation were included. Testing was performed twice for every patient: at the beginning and the end of prosthetics. Weight center position in regard to both lower limbs was analyzed. At the end of prosthetics gait... [to full text]

Baigiamajame magistro darbe atliekami eksperimentiniai gelžbetoninių sijų, sustiprintų pneumatiniu montažiniu pistoletu mechaniškai tvirtinama anglies pluošto juosta, elgsenos tyrimai, nagrinėjama jungių skaičiaus ir išdėstymo įtaka sijos elgsenai. Darbą sudaro: įvadas, trys pagrindiniai skyriai, pasiūlymai ir išvados, literatūros sąrašas. Įvade aptariama tiriamoji problema, darbo aktualumas ir naujumas, pristatomas darbo objektas, formuluojami tikslai ir uždaviniai, pateikiama tyrimų metodika. Pirmajame skyriuje pateikiamos bendros žinios apie sijų stiprinimą, apžvelgiama stiprinimo metodų raida, aptariamos statybiniams kompozitams gaminti naudojamos medžiagos ir aprašomi populiariausi metodai, naudojami statybiniais kompozitais sustiprintų sijų skaičiavimui. Antrajame skyriuje plačiau aptariamas sluoksnių skaičiavimo metodas, atliekama jo parametrinė analizė. Trečiajame skyriuje plačiai aprašomas bandinių paruošimas ir jų bandymo metodika, pateikiami eksperimentinių tyrimų rezultatai, jie palyginami su teoriniais skaičiavimais bei kitų autorių gautais rezultatais. Darbo pabaigoje pateikiami sijų stiprinimo pneumatiniu montažiniu pistoletu mechaniškai tvirtinama anglies pluošto juosta pasiūlymai, formuluojamos išvados. Darbo apimtis – 69 p. teksto be priedų, 33 paveikslai, 5 lentelės, 32 bibliografiniai šaltiniai. / This thesis presents the analysis based on experimental testing of reinforced concrete beams, strengthened by mechanically fastened fiber reinforced polymer strips, when high pressure air powered pinner was used to fasten the strips. The influence of the number and arrangement of fasteners is investigated. Thesis consists of introduction, three main chapters, recommendations and conclusions, literature list. The introduction presents an overview, objectives, scope, methodology and significance of thesis. The first chapter shows the development of beam strengthening, introduces composite materials and methods used for calculating beams strengthened using FRP strips. In the second chapter the chosen calculation method is described in detail and its parametric analysis is performed. Third chapter gives a detailed description on the test specimen preparation and the methodology of testing. Experimental results and their comparison with theoretically obtained values and values obtained by other researchers are given here. The recommendations on the technology of strengthening the beams using mechanically fastened fiber reinforced polymer strips are given and the conclusions are drawn. Thesis contains 69 pages. There are 33 pictures, 5 tables and 32 references in the thesis.