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471 - 480 / 2000
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471.
Graph topological transformations in space-filling cell aggregates
Tanmoy Sarkar, Matej Krajnc, 2024, original scientific article

Abstract: Cell rearrangements are fundamental mechanisms driving large-scale deformations of living tissues. In three-dimensional (3D) space-filling cell aggregates, cells rearrange through local topological transitions of the network of cell-cell interfaces, which is most conveniently described by the vertex model. Since these transitions are not yet mathematically properly formulated, the 3D vertex model is generally difficult to implement. The few existing implementations rely on highly customized and complex software-engineering solutions, which cannot be transparently delineated and are thus mostly non-reproducible. To solve this outstanding problem, we propose a reformulation of the vertex model. Our approach, called Graph Vertex Model (GVM), is based on storing the topology of the cell network into a knowledge graph with a particular data structure that allows performing cell-rearrangement events by simple graph transformations. Importantly, when these same transformations are applied to a two-dimensional (2D) polygonal cell aggregate, they reduce to a well-known T1 transition, thereby generalizing cell-rearrangements in 2D and 3D space-filling packings. This result suggests that the GVM’s graph data structure may be the most natural representation of cell aggregates and tissues. We also develop a Python package that implements GVM, relying on a graph-database-management framework Neo4j. We use this package to characterize an order-disorder transition in 3D cell aggregates, driven by active noise and we find aggregates undergoing efficient ordering close to the transition point. In all, our work showcases knowledge graphs as particularly suitable data models for structured storage, analysis, and manipulation of tissue data.
Keywords: 3D vertex models, cell, software-engineering
Published in DiRROS: 03.09.2024; Views: 164; Downloads: 1381
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472.
Recommendations for testing water samples, in particular for tomato brown rugose fruit virus
Katarina Bačnik, Ion Gutiérrez-Aguirre, Maja Ravnikar, Nataša Mehle, 2020, treatise, preliminary study, study

Abstract: Water can be an important source of plant pathogenic viruses. Usually they are present in low concentrations, but environmental waters still represent a potential pathway for virus transmission. Already over 30 years ago, plant viruses have been shown to be present in environmental waters in considerable amounts (Koenig, 1986). Since then, many questions concerning the origin, survival, and spread of plant viruses by water have been raised, especially in the light of increased irrigation and use of hydroponic systems in agriculture (Mehle and Ravnikar 2012). The majority of the plant pathogenic viruses recovered from environmental waters so far are very stable. They can infect plants via the roots without the aid of a vector and often have a wide host range (Mehle and Ravnikar 2012). The release of such viruses from plants can lead to their diffusion in streams, rivers and lakes, thereby ensuring the long-distance spread of viruses that would otherwise remain restricted to limited areas (Mehle et al., 2014; Mehle and Ravnikar, 2012).
Published in DiRROS: 03.09.2024; Views: 195; Downloads: 76
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473.
Analysis of forest canopy land surface temperature along the Carpathian Mountains over the last two decades
O. Brovkina, M. Švik, Tatjana Veljanovski, Matjaž Čater, 2024, published scientific conference contribution abstract

Keywords: thermal remote sensing, Landsat, forest canopy
Published in DiRROS: 03.09.2024; Views: 294; Downloads: 57
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474.
Priporočila za izboljšanje upravljanja z naravo v Krajinskem parku Ljubljansko barje
Davorin Tome, Al Vrezec, Nataša Mori, 2020, treatise, preliminary study, study

Abstract: Ljubljansko barje so naravoslovci začeli raziskovati že zelo zgodaj, v 18. stoletju, in zaradi bližine Ljubljane, precej bolj intenzivno kot druge dele Slovenije. Zato je v Sloveniji Ljubljansko barje med območji z najbolj raziskano biodiverziteto. Barje je tudi že več kot 100 let prepoznano kot naravovarstveno pomembno območje (Beuk, 1920). Sprva so bili zakonsko zavarovani le posamezni deli Ljubljanskega barja, leta 2008 pa je bil ustanovljen Krajinski park Ljubljansko barje. Barje je od leta 2004 varovano tudi v okviru Natura 2000 omrežja. Kljub izjemni pestrosti pa naravovarstveni ukrepi naslavljajo predvsem nekaj posameznih krovnih vrst in habitatnih tipov v okviru Nature 2000.
Keywords: biodiverziteta, Ljubljansko barje, naravovarstvo, upravljanje, ukrepi za varovanje biodiverzitete
Published in DiRROS: 03.09.2024; Views: 249; Downloads: 2661
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475.
476.
Predlog načrta za hitro odzivanje ob najdbi azijskega sršena (Vespa velutina) : Projekt LIFE ARTEMIS, izdelek akcije A2
Maarten De Groot, Simon Zidar, Danilo Bevk, Mojca Pibernik, Metka Pislak, Jana Kus Veenvliet, 2020, treatise, preliminary study, study

Abstract: A proposal of a rapid response plan for the Asian hornet (Vespa velutina) was prepared in the LIFE ARTEMIS Project. The Asian hornet is an invasive alien species which is on the priority list of the IAS EU legislation 1143/2014. In the proposal the EWRR system is described for the finding and the rapid response for the asian hornet. First findings of the asian hornet will be submitted to the information system »Invazivke« or to the National Veterinary Institute (NVI). When data is checked, it will be send to the coordinating governmental body - Slovenian Environment Agency (ARSO) within two days. During the rapid response proces, two tactical meetings will be organised. First ARSO will inform The Ministry of the Environment and Spatial Planning (MOP) about the finding, which will send it to the European commission. On the first tactical meeting the coordinator for the rapid response actions will be determined. Institute of the Republic of Slovenia for Nature Conservation (ZRSVN) will prepare a first survey in which the status of the population will be determined. Furthermore, all inform general public, landowners and local communities in the invaded area. Within two days to 14 days after the submission of the survey report, the second tactical meeting will be held. During this meeting the possible eradication actions will be discussed and the tasks will be divided. After that the organisation responsible for the rapid response action will prepare the final plan of eradication. The organisation responsible for the eradication action will take action. Information on the eradication action are written in the report. After that it will be checked whether the eradication was successful. In case this was not, more eradication actions will take place. If it will be successful the area will be monitored for the coming 5 years to be sure that the species is really eradicated. All information will be send to ARSO, who will inform MOP. MOP will inform the European commission and the member states.
Keywords: azijski sršen, invazivni organizmi, tujerodni organizmi
Published in DiRROS: 03.09.2024; Views: 220; Downloads: 949
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477.
478.
HarmoNIA methodological proposals : Harmonizing monitoring and decommissioning procedures of offshore platforms
Loredana Manfra, Claudia Virno Lamberti, Benedetta Trabucco, Andriana Aravantinou, Oliver Bajt, Daniela Berto, Ana Castelli, Silvia Ceracchi, Branko Čermelj, Rossella Di Mento, Maja Fafanđel, Margarita Formalewicz, Michele Giani, Giordano Giorgi, Danijela Joksimović, Pasquale Lanera, Marina Lipizer, Slavica Matijević, Milena Mitrić, Stefanos Papazisimou, Constantine Parinos, Alice Rotini, Christina Zeri, 2020, treatise, preliminary study, study

Abstract: The overall increase in maritime transport, coastal urbanization and the foreseen increase in offshore oil and gas extraction pose serious risks of pollution from hazardous substances for several coastal states in the whole Mediterranean, and in particular in the Adriatic - Ionian region. Countries sharing a marine region or sub-region should adopt a common approach to environmental monitoring, good environmental status definition and assessment. In the Adriatic – Ionian marine sub-regions, the level of coherence and consistency of several EU and regional environmental policies, particularly in the assessment of contamination from hazardous substances, needs a common implementation. In the framework of enhancing the capacity to tackle environmental vulnerability and safeguard ecosystem services at transnational scale, the objective of HarmoNIA is twofold: to share best practices to support the harmonized implementation of marine environmental directives in the ADRION regionto strengthen the network of data infrastructures to facilitate access and re-use of marine data among countries bordering the Adriatic – Ionian Seas. Building on the EU initiative EMODnet for the management and supply of fragmented marine data, HarmoNIA will strengthen the existing transnational network of data infrastructures to facilitate access and re-use of marine data among countries bordering the Adriatic – Ionian Seas. The project will improve the coherence, among most countries bordering the Adriatic and Ionian Seas, all Contracting Parties of the Barcelona Convention, of protocols for monitoring and for assessment of contaminants in the marine environment and will facilitate data and information exchange within the region. The outputs will consist in a Transnational network of institutions adopting a joint data management system for contaminants in the marine environment, and in regional strategies to improve harmonization in monitoring and assessment, and to evaluate risk of contaminant dispersion in vulnerable coastal zones from different pollution sources. HarmoNIA outputs will improve the coordination among institutions involved in MSFD and UNEP/MAP protocol implementation, local, regional and national authorities in charge of environmental assessment, management, conservation, as well as research institutions, to tackle problems related to pollution dispersal and risks on the coastal areas of the ADRION region. The transnational approach will be assured by the cooperation among partners from most of the countries bordering the ADRION region, with consolidated experience in marine data acquisition and management and involved in the implementation of marine environmental policies.
Keywords: marine pollution, environment, chemical substances
Published in DiRROS: 03.09.2024; Views: 217; Downloads: 675
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479.
480.
HarmoNIA methodological proposals : Harmonizing monitoring of marine contaminants and sharing data Quality Control procedures
Daniela Berto, Margherita Malgorzata Formalewicz, Giordano Giorgi, Loredana Manfra, Marina Lipizer, Maria-Eugenia Molina Jack, Andriana Aravantinou, Oliver Bajt, Magdalena Cara, Ana Castelli, Branko Čermelj, Maja Fafanđel, Michele Giani, Ioannis Hatzianestis, Athanassia Iona, Damir Ivankovic, Danijela Joksimović, Helen Kaberi, Jerina Kolitari, Martina Kralj, Slavica Matijević, Milena Mitrić, Stefanos Papazisimou, Constantine Parinos, Mojca Dobnikar-Tehovnik, Catherine Tsangaris, Ivana Ujević, Melita Velikonja, Christina Zeri, Luka Žilić, 2020, treatise, preliminary study, study

Abstract: The overall increase in maritime transport, coastal urbanization and the foreseen increase in offshore oil and gas extraction pose serious risks of pollution from hazardous substances for several coastal states in the whole Mediterranean, and in particular in the Adriatic - Ionian region. Countries sharing a marine region or sub-region should adopt a common approach to environmental monitoring, good environmental status definition and assessment. In the Adriatic – Ionian marine sub-regions, the level of coherence and consistency of several EU and regional environmental policies, particularly in the assessment of contamination from hazardous substances, needs a common implementation. In the framework of enhancing the capacity to tackle environmental vulnerability and safeguard ecosystem services at transnational scale, the objective of HarmoNIA is twofold: to share best practices to support the harmonized implementation of marine environmental directives in the ADRION regionto strengthen the network of data infrastructures to facilitate access and re-use of marine data among countries bordering the Adriatic – Ionian Seas. Building on the EU initiative EMODnet for the management and supply of fragmented marine data, HarmoNIA will strengthen the existing transnational network of data infrastructures to facilitate access and re-use of marine data among countries bordering the Adriatic – Ionian Seas. The project will improve the coherence, among most countries bordering the Adriatic and Ionian Seas, all Contracting Parties of the Barcelona Convention, of protocols for monitoring and for assessment of contaminants in the marine environment and will facilitate data and information exchange within the region. The outputs will consist in a Transnational network of institutions adopting a joint data management system for contaminants in the marine environment, and in regional strategies to improve harmonization in monitoring and assessment, and to evaluate risk of contaminant dispersion in vulnerable coastal zones from different pollution sources. HarmoNIA outputs will improve the coordination among institutions involved in MSFD and UNEP/MAP protocol implementation, local, regional and national authorities in charge of environmental assessment, management, conservation, as well as research institutions, to tackle problems related to pollution dispersal and risks on the coastal areas of the ADRION region. The transnational approach will be assured by the cooperation among partners from most of the countries bordering the ADRION region, with consolidated experience in marine data acquisition and management and involved in the implementation of marine environmental policies.
Keywords: chemical pollution, monitoring programmes
Published in DiRROS: 03.09.2024; Views: 206; Downloads: 1181
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