The 40th Technical Sessions of the IPSL in conjunction with the 44th AGM of the IPSL was held on Saturday, 23rd March 2024. The purpose of the Sessions is to enable members to present work done by them in the form of a research paper. Members who wish to read their papers are kindly requested to submit their manuscripts through the IPSL website, https://ipsl.lk/technical-sessions/ by November 30, 2023