This research explores the architectural legacy of Eižens Laube in Jūrmala city. E. Laube (1880–1967) was at those times one of the most influential Latvian architects both in praxis and in academic field. Nowadays, no significant overview on his architectural legacy in Latvia and particularly in Jūrmala has been done. The aim of this article is to provide an updated list of architectural works of E. Laube in Jūrmala, to explore the current condition of these objects and trace particular regularity in their development. The article actualizes the general necessity to explore the architectural legacy of architect E. Laube and illuminates the architectural exploration methods in Jūrmala up to the 1990s. The findings enrich the history of Latvian architecture and Jūrmala city and may serve for some architectural and touristic materials.
The goal is to analyze the tendencies of the formation of recreational landscape of the Palanga resort and, after reviewing the planning experiences of other south-eastern Baltic resorts, present measures for landscape optimization. To achieve this, an analysis of changes of the seaside recreational landscape after 1990, the current state of resorts, scientific literature, and seaside resort planning was conducted. After assessing the changes in the recreational landscape, it has been noticed that for a quarter of the last century, planning of seaside resorts was aimed at attracting and accommodating an increasing number of holidaymakers, which caused an ever increasing need to intensify the construction in the territories, increasing the scale of buildings, and urbanizing natural territories without taking into consideration the existing natural and cultural environment. Natural, anthropogenic and social factors are affecting the recreational landscape of seaside resorts, which are important in the context of resort development and regional development. The article presents the means of Palanga resort optimization based on these factors.
Urban regeneration with a view to efficient use of urban areas has been a strategy for urban development for decades. Densification is used as a planning approach to promote the implementation of the compact city model and to discourage urban sprawl. The central parts of the city are usually of high density, so the areas outside the city’s historic centre are seen as potential sites for urban densification. In many European cities large-scale residential areas built after the Second World War occupy a significant part of the territory outside of the city’s historic centres. Today, these housing areas are in most cases sleeping areas with great potential for development. Densification of urban areas outside of urban nuclei is not an easy task, and deals with a whole series of challenges.
The paper examines the existing approaches focused on densification in large housing estates. In order to define the typical challenges of this process, the examples of infill developments in large housing area Imanta in Riga are analysed. The analysis of infill development in Imanta showed four possible approaches. Some approaches contribute to the improvement of public space for neighbourhood inhabitants in general, still some approaches tend to isolate the new development and inhabitants from the surrounding territory.
The concept of urban gardening varies a lot in terms of gardening forms and main purposes. Followed by changes in people life style, growing interest in healthy living and sustainable urban development, the aims of urban gardening become more complex. The product of urban garden, e. g. vegetables or ornamental plants, nowadays plays less important role, as the main focus is on societal issues, urban regeneration, education and health. Thus, this article provides evidence of multi-functionality of urban gardening to address the variety of societal issues across people of different age and cultural background. Case studies from Malmo, Birmingham and Riga show how urban gardening contributes to social integration, inhabitants’ well-being and urban regeneration.
This paper deals with criteria and conditions that must be fulfilled by a modern grinding wheel dressing system. Its main task is the correct drawing of the given profile. By this task, the diamond pin’s axis must close during the motion at a constant angle with the normal of the wheel’s surface. This study presents the build-up and the proposed control strategy of the dressing device. Two control methods were analysed and compared.
Nowadays more and more ultralight aircraft are being built because the building process itself and the acquisition of the necessary documentation is relatively easy. Furthermore, these planes are easier to fly than larger types of aircraft. This article presents the engineering work and documentation that is necessary for the building process. The calculations can be done traditionally on paper which is an extremely complex task. With the innovations and developments in the technical field though, it is possible now to simplify these calculations, the basis of which is the finite element method and aerodynamics simulations. If the finite element method is adequate, the boundary conditions are ideal and input-output settings for the simulations are correct, it is possible to compare the traditional calculations to the modern simulated engineering work, thus the time necessary for achieving precise results becomes significantly shorter.
Csaba Ungvári, Andrea Izbéki-Szabolcsik and Ildikó Bodnár
In our research we pre-treated synthetically produced greywaters with filtration on various filters. We characterised the quality of greywater samples using several parameters. We investigated these parameters on the untreated and pre-treated samples as well. We evaluated the efficiency of the treatments by measuring the characteristic parameters. It was shown that the most effective pre-treatment for the greywater’s preparation for reuse is filtration on silica sand or activated charcoal and silica sand combined filter media.
András Gábora, Kristóf Balázs Sipos, Gyula Dávid Lovadi, Attila Szántó, Gusztáv Áron Szíki and Marian Borzan
The Faculty of Engineering of the University of Debrecen has more than ten-years of experience in developing vehicles with pneumatic drive. It is an increasing challenge for the developer teams to improve the performance of vehicles, with rules becoming increasingly strict year by year. Recently, a student team of the Faculty of Engineering began developing a telemetric system to support the other teams at our Faculty and improve the possibility of their successful racing in this way.
The technological advantages of ultrasonic welding: (no requirement for filler metal; use of small electrical transient resistance contacts; ability to weld thin materials to thick materials) results in a helium-solid weld seam; the computer configuration of the welding parameters can easily be solved; clean and safe workflow (no sparks, flame or smoke); can be integrated into the production line. This article deals with some of the additional application features of this welding process.
Roland Nagy, Péter Lendvai, Réka Kothencz and László Bartha
The efficiency of demulsification is a key process in terms of extracting the oil of O/V (oil-in-water type) emulsions of enhanced oil recovery. Consequently, the separation of emulsion systems and the recovery of the maximum amount of oil from the colloid system play an important role in the petroleum industry. The stability of the emulsions from oil recovery is influenced by numerous factors. J. L. Salager developed the HLD (Hydrophilic-Lipophilic Deviation) equation in order to examine the efficiency of demulsification. Our aim was to investigate whether the equation developed by Salager is suitable for monitoring the stability of petroleum industrial emulsions.