1. Envisioning the future of agri-tourism in Ukraine: from minor role to viable farm households and sustainable regional economies 

   Ohorodnyk, Vira; Finger, Robert (2024)

   Journal of Rural Studies

   Agritourism is known to play a pivotal role when providing diversification of farm activities, making in such way for sustainable regional and local development. However, it should be stated that in Ukraine agritourism has not received proper attention in the pre-war and current period. This paper explores the landscape of agritourism in Ukraine across pre-war and current periods, assessing its potential for the country advancement. The ...

   Journal Article

2. Left atrial appendage occlusion techniques for open heart surgery and for minimally invasive thoracotomy 

   Van Praet, Karel M.; Kofler, Markus; Schneider, Christian G.; et al. (2024)

   Annals of Cardiothoracic Surgery

   Other Journal Item

3. Ramsey numbers for multiple copies of sparse graphs 

   Sulser, Aurelio; Trujic, Milos (2024)

   Journal of Graph Theory

   For a graph H $H$ and an integer n $n$, we let n H $nH$ denote the disjoint union of n $n$ copies of H $H$. In 1975, Burr, Erdos and Spencer initiated the study of Ramsey numbers for n H $nH$, one of few instances for which Ramsey numbers are now known precisely. They showed that there is a constant c = c( H ) $c=c(H)$ such that r(n H ) =(2 divide H divide - alpha( H ) ) n + c $r(nH)=(2| H| -\alpha (H))n+c$, provided n $n$ is sufficiently ...

   Journal Article

4. A new equation for the mean free path of air 

   Tsalikis, Dimitrios G.; Mavrantzas, Vlasis G.; Pratsinis, Sotiris E. (2024)

   Aerosol Science and Technology

   A recent rigorous methodology for determining the mean free path, lambda, of air at ambient conditions [Tsalikis, D. G., Mavrantzas, V. G., & Pratsinis, S. E. (2023). Physics of Fluids, 35, 097131] is extended to pressures, P, from 0.5 to 5 atm and temperatures, T, from 100 to 3000 K that are of environmental and industrial relevance, allowing to derive a new simple equation for lambda as a function of T and P. This entails molecular ...

   Journal Article

5. Disentangled Melt of Ultrahigh-Molecular-Weight Polyethylene: Fictitious or Real? 

   Litvinov, Victor; Christakopoulos, Fotis; Lemstra, Pieter Jan (2024)

   Macromolecules

   There are two opposing views on the role of the melting of low-entangled polyethylenes on the obtained entanglement density in the molten state and the time required for its equilibration, namely, instantaneous recovery to the equilibrium melt state upon melting (chain explosion) versus slow recovery (melt memory effect). A series of rheological studies have shown that slow heating of low-entangled nascent ultrahigh-molecular-weight ...

   Journal Article

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