STATISTICAL EVALUATION OF THE RELATIONSHIP BETWEEN GRAVEL ROAD DUSTINESS AND ENVIRONMENTAL CONDITIONS USING MOLASSES SOLUTION FOR REDUCING DUSTINESS / ŽVYRKELIO DULKĖJIMO IR APLINKOS SĄLYGŲ SĄRYŠIO STATISTINIS ĮVERTINIMAS, DULKĖJIMUI MAŽINTI NAUDOJANT TIRPALĄ MELASOS PAGRINDU

The problem of gravel road dustiness is quite acute. In order to minimize harmful environmental components and to conduct dust reduction tests, molasses materials were chosen. Using the molasses materials of a new generation (solution Safecote) in the Lithuanian market, the obtained results of dustiness have reflected a reduction in particulate matter in the air. During the experiment, gravel road pavement was treated with different degrees of concentration (10%, 20%, 30%) in solution “Safecote” at a driving speed of 30 km/h. Dustiness was measured at different distances from the road (0 m, 1 m, 2 m, 3 m). The undertaken study showed that the concentrations of particulate matter varied under changing weather conditions (air temperature, humidity, wind speed, atmospheric pressure). The statistical analysis of the received data has revealed that dustiness weakly correlates with temperature (correlation coefficient ranged from 0.12 to 0.67) moving from the road, the correlation coefficient of moisture is negative, a larger distance from the road increases inverse correlation (the correlation coefficient ranges from –0.02 to –0.85), negative correlation decreases moving from the road at a speed of the wind (from –0.72 to –0.06) and pressure correlation remains volatile (from –0.44 to 0.44). Santrauka Žvyrkelių dulkėtumo problema yra gana aktuali. Norint kuo mažiau kenkti aplinkos komponentams, dulkėtumo mažinimo tyrimams buvo pasirinkta medžiaga melasos pagrindu. Naudojant Lietuvos rinkoje gana naują melasos pagrindu pagamintą medžiagą (tirpalą „Safecote“) gauti dulkėtumo rezultatai parodė kietųjų dalelių ore mažėjimą. Tyrimų metu žvyrkelis buvo apdorotas skirtingomis tirpalo „Safecote“ koncentracijomis (10 %, 20 %, 30 %), аutomobiliai važiavo 30 km/h greičiu. Dulkėtumas matuotas skirtingais atstumais nuo kelio (0 m, 1 m, 2 m, 3 m). Atliekant tyrimus, pastebėta, kad kietųjų dalelių koncentracija kito, kintant oro sąlygoms (oro temperatūrai, oro drėgmei, vėjo greičiui, atmosferos slėgiui). Atliekant statistinę gautų duomenų analizę nustatyta, kad dulkėtumas tolstant kuo kelio su temperatūra mažai susijęs (temperatūros koreliacijos koeficientas svyravo nuo 0,12 iki 0,67), drėgmės koreliacijos koeficientas buvo neigiamas, o tolstant nuo kelio atvirkštinė koreliacija smarkėjo (koreliacijos koeficientas svyravo nuo –0,02 iki –0,85), tolstant nuo kelio vėjo greičiu neigiama koreliacija mažėjo (nuo –0,72 iki –0,06), o slėgio koreliacinis ryšys buvo nepastovus (nuo –0,44 iki 0,44). Raktiniai žodžiai: aplinkos sąlygos; dulkėtumas; statistinis įvertinimas; žvyrkelia

MANIFESTATION OF POSTMODERNIST IDEAS IN ARCHITECTURAL COMPETITIONS AND UNREALIZED DESIGN PROJECTS IN LITHUANIA OF THE 1970S AND 80S / POSTMODERNIZMO IDĖJŲ RAIŠKA XX A. 8-OJO IR 9-OJO DEŠIMTMEČIŲ LIETUVOS ARCHITEKTŪROS DARBŲ KONKURSUOSE IR NEĮGYVENDINTUOSE

The research work analyzes the influence of the post-modernism phenomenon on Lithuanian architecture as observed since the 1970-s. This controversially estimated period in architectural history opposed the modernist tradition by its cultural and aesthetical landmarks. In the Lithuanian context it was distinguished by the raise of its expression partially overlapping with the period of post-soviet socio-cultural fractures. After short introduction of prerequisites of postmodernist idea formation in architecture, the text focuses on the main ideological concepts and characteristic features of architecture related to postmodernism. Besides the evaluation of influence of western postmodernist architecture on the soviet space, the aim of the article is to analyze the objects innovative by their aesthetics, applied symbolism and treatment of their application to the society in the sociocultural context of the time. The text focuses on unrealized projects and competition offers of the 1970-s and 80-s (from the emergence of the first examples to the reestablishment of Lithuanian independence) with most brightly reflected postmodern trends: complex composition, eclecticism, historical references and decreasing scale. The examples analyzed in the research are a part of culture of the complicated transformation time, which is underestimated.</p