/library/oar/handle/123456789/403 Wed, 04 Nov 2026 09:39:20 GMT 2026-11-04T09:39:20Z /library/oar/handle/123456789/150726 Title: Coastal sea temperature data using low-cost commercial sensors around a small Mediterranean Island Authors: Ribotti, Alberto; Stagno, Sergio; Schirru, Stefano; Deidun, Alan; Zammit, Audrey; Ramirez Montano, David Fernando; Madeddu, Alessandro; Montis, Mauro; Gibertini, Alessandro; Satta, Andrea; Sorgente, Roberto; Gauci, Adam; Marras, Stefano Abstract: The acquisition of coastal data, especially in areas of the Mediterranean, is of fundamental importance in numerical forecasting and climatological studies. Islands are particularly significant due to their central location within the sub-basins of the Mediterranean Sea. It is equally important to obtain high-quality data acquired according to common standards, which can be achieved through the exchange of information. In Sardinia, western Mediterranean, an initial experiment was conducted on the small island of San Pietro through the Citizen Science project MedSeaPOD. Twenty temperature sensors were installed at 17 sites around the island for minimum of 12 months in very shallow waters between 3 and 30 metres depth, involving local not scientist people. This made it possible to provide high-quality scientific data to the European EMODnet repository and to raise public awareness of climate change. This project has been recognized as having relevant scientific value by the Intergovernmental Oceanographic Commission (IOC) of UNESCO and it has received the endorsement as Action of the Ocean Decade (2021-2030), within which we have established contacts with scientists from neighbouring Corsica. Terminated in September 2025, acquisitions and the activities as Action went on through the involvement of stakeholders in Sardinia measuring coastal temperature in other sites and other Mediterranean islands like Malta, through a bilateral project that has started in January 2026, where similar measurements are being collected. Thu, 01 Jan 2026 00:00:00 GMT /library/oar/handle/123456789/150726 2026-01-01T00:00:00Z /library/oar/handle/123456789/150717 Title: Solution to a problem of Katona on counting cliques of weighted graphs Authors: Borg, Peter; Feghali, Carl; Pellerin, Rémi Abstract: A subset I of the vertex set V ( G ) of a graph G is called a k -clique independent set of G if no k vertices in I form a k -clique of G . An independent set is a 2-clique independent set. Let π k ( G ) denote the number of k -cliques of G . For a function w : V ( G ) → { 0 , 1 , 2 , … } , let G ( w ) be the graph obtained from G by replacing each vertex v by a w ( v ) -clique K v and making each vertex of K u adjacent to each vertex of K v for each edge { u , v } of G . For an integer m ≥ 1 , consider any w with ∑ v ∈ V ( G ) w ( v ) = m . For U ⊆ V ( G ) , we say that w is uniform on U if w ( v ) = 0 for each v ∈ V ( G ) ∖ U and, for each u ∈ U , w ( u ) = m / | U | or w ( u ) = m / | U | . Katona asked if π k ( G ( w ) ) is smallest when w is uniform on a largest k -clique independent set of G . He placed particular emphasis on the Sperner graph B n , given by V ( B n ) = { X : X ⊆ { 1 , … , n } } and E ( B n ) = { { X , Y } : X ⊊ Y ∈ V ( B n ) } . He provided an affirmative answer for k = 2 (and any G ). We determine graphs for which the answer is negative for every k ≥ 3 . These include B n for n ≥ 2 . Generalizing Sperner’s Theorem and a recent result of Qian, Engel and Xu, we show that π k ( B n ( w ) ) is smallest when w is uniform on a largest independent set of B n . We also show that the same holds for complete multipartite graphs and chordal graphs. We show that this is not true of every graph, using a deep result of Bohman on triangle-free graphs. Mon, 01 Jan 2024 00:00:00 GMT /library/oar/handle/123456789/150717 2024-01-01T00:00:00Z /library/oar/handle/123456789/150716 Title: A data analysis application for a systematic reporting of dielectric properties of biological tissue Authors: Bonello, Julian; Farrugia, Lourdes; Cutajar, Denis; Godinho, Daniela; Conceição, Raquel; Farhat, Iman; Sammut, Charles V. Abstract: The dielectric properties of biological tissues are the basis of new and existing medical devices which utilise microwaves. To date, numerous studies have been published which report on the dielectric properties for various biological tissues. When examining published literature, it is apparent that discrepancies in the methodology exist along with the way the data is analysed and reported. In this work, we present a data analysis application developed in Matlab which allows the user to import multiple dielectric data files and analyse them simultaneously. The analysis is developed as per a best-practices guidelines developed as consensus work within the COST MyWAVE network. [excerpt] Tue, 01 Aug 2023 00:00:00 GMT /library/oar/handle/123456789/150716 2023-08-01T00:00:00Z /library/oar/handle/123456789/150638 Title: Fresh groundwater beneath our oceans Authors: Hoffmann, Jasper J. L.; Micallef, Aaron Abstract: Have you ever tried to dig a deep hole at the beach? At the bottom of the hole, it probably got very wet, making it di cult to dig any deeper. That is when you reached the groundwater. In many places, groundwater is the main source of fresh water for drinking and farming. In your hole on the beach, the water was probably salty and not drinkable right? That is because you are so close to the salty ocean. However, in some locations, you can find freshwater coming out of the ground right on the beach. In other locations, if you swim out into the ocean and dive down, you can find holes in the seafloor where fresh groundwater comes out. These groundwater springs in the ocean are important for the surrounding ecosystems and coastal communities. Fresh groundwater can be found up to 90 km off the coast and could be a potential future source of drinking water in dry regions. Sun, 01 Jan 2023 00:00:00 GMT /library/oar/handle/123456789/150638 2023-01-01T00:00:00Z