Research Publications Authored by SLIIT Staff
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This collection includes all SLIIT staff publications presented at external conferences and published in external journals. The materials are organized by faculty to facilitate easy retrieval.
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Publication Open Access Impact of climate change on agricultural production efficiency in leading agriculture-producing economies: A DEA Malmquist Productivity Index(Elsevier B.V., 2026-01-06) Ahmad, J; Wang, Y; Zhang, L; Shah, W.U.H; Yasmeen, R; Pathiranage, H.S.KClimate change significantly impacts global agricultural productivity, making it essential to examine its precise influence on production efficiency. This study evaluates the impact of climate change on agricultural production efficiency among the global leading agriculture-producing economies from 1990 to 2021. Using a DEA–Malmquist Productivity Index, the study estimates total factor productivity change (TFPC) and decomposes it into efficiency change (EC) and technological change (TC), both without and with explicit climate variables (temperature, precipitation). Average TFPC without climate factors is 1.0428, indicating 4.28 % productivity growth over the period, primarily driven by technological change. When climate variables are incorporated, the average TFPC is 1.0409; the mean difference of −0.0019 (≈ −0.18 %) shows a small but non-negligible climate impact on productivity growth. Regional variations are heterogeneous: South America and Africa exhibit diverse climate impacts, while Oceania shows the least climate effect. Mann-Whitney U and Kruskal-Wallis tests confirm significant differences in TFPC (and components) between climate and non-climate specifications and across regions. The findings underscore technology's key role in sustaining productivity under climate stress and highlight the need for region-specific adaptation policies to complement technological diffusion.Publication Open Access Analysis of recent trends and variability of temperature and relative humidity over Sri Lanka(India Meteorological Department, 2022-07-01) Rathnayake, U; Gunathilake, M. B; Senatilleke, U; Alyousifi, YThe world is experiencing adverse consequences of climate change and shifts in climate regimes. Hence, studying the trends and patterns of meteorological variables is of major importance for many parties, including meteorologists, climatologists, agriculturists and hydrologists. Although several researchers have examined the trends and patterns in historical rainfall, only a few have examined the trends in atmospheric temperature. Noteworthy none of the previous studies have attempted to investigate trends in relative humidity over Sri Lanka. Therefore, identifying this existing research gap, this present paper presents a trends and variability analysis of atmospheric temperature and relative humidity of Sri Lanka. The long-term variations of minimum and maximum temperature and relative humidity records at 18 stations distributed in the three climatic zones namely, the dry zone, the intermediate zone and the wet zone in Sri Lanka were investigated for 30 years from 1990 to 2019. Annual and monthly trends were assessed using non-parametric statistical tests, including the Mann Kendall test (MK), Sen’s slope and Spearman’s rho test, while the changing points of temperature and humidity were determined using the Pettit test. In addition, the variability of climate parameters was estimated using the Coefficient of Variation (CoV). Interesting and encouraging results were obtained from the present analysis. Badulla in the intermediate climatic zone was identified with unexpected decreasing temperature trends, while several other areas were identified with expected increasing temperature and relative humidity trends. The adaptation practices based on these results would be interesting to incorporate in achieving sustainable development goals for the country