291. |
292. Exact solution to a Bhatnagar-Gross-Krook-type equation for quantum lattice gases with dephasing noiseMichele Coppola, 2025, izvirni znanstveni članek Povzetek: The mean-state dynamics of free fermions subject to random projective measurements of local occupation number operators is governed by a Lindblad equation with dephasing noise. In the continuum limit, the equation of motion for the correlation matrix is mapped to a kinetic equation for the Wigner function, which corresponds to a special case of the Bhatnagar-Gross-Krook (BGK) equation without energy conservation. Our main result is the solution to the kinetic equation, showing that the Wigner dynamics emerges from stochastic sampling of classical run-and-tumble processes. As an application, we recover the crossover between ballistic and diffusive transport regimes.
Ključne besede: quantum lattice gases, dephasing noise, BGK-type kinetic equation
Objavljeno v DiRROS: 27.11.2025; Ogledov: 149; Prenosov: 61
 Celotno besedilo (427,46 KB)
Gradivo ima več datotek! Več... |
293. |
294. |
295. |
296. |
297. |
298. Television food advertising to children in Slovenia : analyses using a large 12-month advertising datasetŽiva Lavriša, Igor Pravst, 2016, izvirni znanstveni članek Povzetek: Objectives: The marketing of energy-dense foods is recognised as a probable causal factor in children's overweight and obesity. To stimulate policymakers to start using nutrient profiling to restrict food marketing, a harmonised model was recently proposed by the WHO. Our objective is to evaluate the television advertising of foods in Slovenia using the above-mentioned model. Methods: An analysis is performed using a representative dataset of 93,902 food-related advertisements broadcast in Slovenia in year 2013. The advertisements are linked to specific foods, which are then subject to categorisation according to the WHO and UK nutrient profile model. Results: Advertising of chocolate and confectionery represented 37% of food-related advertising in all viewing times, and 77% in children's (4-9 years) viewing hours. During these hours, 96% of the food advertisements did not pass the criteria for permitted advertising according to the WHO profile model. Conclusions: Evidence from Slovenia shows that, in the absence of efficient regulatory marketing restrictions, television advertising of food to children is almost exclusively linked to energy-dense foods. Minor modifications of the proposed WHO nutrient profile model are suggested.
Ključne besede: food advertising, nutrient profile, regulation, children, television, marketing
Objavljeno v DiRROS: 27.11.2025; Ogledov: 169; Prenosov: 80
Celotno besedilo (1,01 MB)
Gradivo ima več datotek! Več... |
299. |
300. |
