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    Wyświetlanie 1-3 z 3
    Tytuł:
    A GIS-Based Analysis of Temporal Changes of Land Use Pattern in Batticaloa MC, Sri Lanka from 1980 to 2018
    Autorzy:
    Mathanraj, S.
    Ratnayake, R. M. K.
    Rajendram, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1046562.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Barren land
    Land use changes
    Planning
    Temporal pattern
    Opis:
    Batticaloa MC, one of the fastest-growing cities in Sri Lanka, is the most vital agglomeration that should concentrate upon temporal changes in land use. Various land use categories, namely commercial, residential, agricultural, scrubland, mangroves, water and barren land in Batticaloa, have been modified by the different purposes of utilization. This study aims to identify the land-use changes of Batticaloa Municipal Council from 1980 to 2018. Primary and secondary data collection methods were used to gather the data for analysis. Comparison was made to the various land use categories in 1980, 1990, 2000, 2010 and 2018. The temporal pattern of land-use change was presented via a comparison of the five-time periods of land use. ArcGIS 10.4.1 and MS Excel 2013 were applied to analyse the maps and data. The finding of the study was that between 1980 and 2018, there were significant land-use changes in the study area. Commercial and residential areas increased by 20.17 ha and 1148.57 ha, respectively, and barren land and agricultural land lost 769.54 ha and 301.99 ha, respectively. In addition, rest land use categories were converted into other land use categories during these periods. The effects of human activities are immediate and often radical, while the natural effects are relatively long. The recommendations are to enforce future land use planning, and protect forest resources through land-use strategies by way of the government with community participation encouraging the approval of urban planners to make decisions about urban development.
    Źródło:
    World Scientific News; 2019, 137; 210-228
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Risk-based maintenance assessment in the manufacturing industry: minimisation of suboptimal prioritisation
    Autorzy:
    Ratnayake, R. M. Chandima
    Antosz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/406817.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    classification
    fuzzy logic
    manufacturing firms
    risk based maintenance
    risk matrix
    Opis:
    Manufacturing firms continuously strive to increase the efficiency and effectiveness in the maintenance management processes. Focus is placed on eliminating the unexpected failures which cause unnecessary costs and the production losses. Risk-based maintenance (RBM) strategies enable to address the above through the identification of probability and consequences of potential failures whilst providing a way for prioritisation of maintenance actions based on the risk of possible failures. Such prioritisations enable to identify the optimal maintenance strategy, intervals of maintenance tasks, and optimal level of spare parts inventory. However, the risk assessment activities are performed with the support of a risk matrix. Suboptimal classifications and/or prioritisations arise due to the inherent nature of the risk matrix. This is caused by the fact that there are no means to incorporate actual circumstances at the boundary of the input ranges or at the levels of linguistic data and risk categories. In this paper, a risk matrix is first developed in collaboration with one of the manufacturing firms in Poland. Then, it illustrates the use of fuzzy logic for minimisation of suboptimal prioritisation and/or classifications using a fuzzy inference system (FIS) together with illustrative membership functions and a rule base. Finally, an illustrative risk assessment is also demonstrated to illustrate the methodology.
    Źródło:
    Management and Production Engineering Review; 2017, 8, 1; 38-45
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical reduction of nitrate by zerovalent iron nanoparticles adsorbed radiation-grafted copolymer matrix
    Autorzy:
    Ratnayake, S. Y.
    Ratnayake, A. K.
    Schild, D.
    Maczka, E.
    Jartych, E.
    Luetzenkirchen, J.
    Kosmulski, M.
    Weerasooriya, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/146536.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    1-pK Basic Stern Model
    acid-driven surface-mediated process
    Eley-Rideal like mechanism
    priority contaminant
    zerovalent iron nanoparticles
    Opis:
    This research specifically focused on the development of a novel methodology to reduce excess nitrate in drinking water utilizing zerovalent iron nanoparticles (nZVI)-stabilized radiation-grafted copolymer matrix. nZVI was synthesized by borohydrate reduction of FeCl3 and stabilized on acrylic acid (AAc)-grafted non-woven polyethylene/polypropylene (NWPE/PP-g-AAc) copolymer matrix, which was grafted using gamma radiation. The use of nZVI for environmental applications is challenging because of the formation of an oxide layer rapidly in the presence of oxygen. Therefore, radiation-grafted NWPE/PP synthetic fabric was used as the functional carrier to anchor nZVI and enhance its spreading and stability. The chemical reduction of nitrate by nZVI-adsorbed NWPE/PP-g-AAc (nZVI-Ads-NWP) fabric was examined in batch experiments at different pH values. At low pH values, the protective layers on nZVI particles can be readily dissolved, exposing the pure iron particles for efficient chemical reduction of nitrate. After about 24 h, at pH 3, almost 96% of nitrate was degraded, suggesting that this reduction process is an acid-driven, surface-mediated process. The nZVI-water interface has been characterized by the 1-pK Basic Stern Model (BSM). An Eley-Rideal like mechanism well described the nitrate reduction kinetics. In accordance with green technology, the newly synthesized nZVI-Ads-NWP has great potential for improving nitrate reduction processes required for the drinking water industry.
    Źródło:
    Nukleonika; 2017, 62, 4; 269-275
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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