1,721,534 research outputs found
Artificial Light at Night: A New Challenge in Microphytobenthos Research
Full text linkArtificial light at night (ALAN) has been recently recognized as a globally widespread anthropogenic disturbance, characterized by different intensities and spectra, as well as spatial and temporal variability. Among marine organisms, those living on coastal areas are particularly exposed to artificial light. Some recent studies anticipated a potential for influences of ALAN on microphytobenthos (MPB) on rocky shores, either direct or indirectly mediated by trophic relationships. Here we emphasize the need for further investigations in different habitats, as well as on synergistic interferences
with other stressors already impinging on coastal areas. The study of effects of ALAN poses new challenges in MPB research, including those related to the use of instruments for measuring both the light environment and the functioning of microbial photoautotrophs at night, and to the development of common monitoring approaches and manipulative experiments
The importance of punctuality in rail transport investigation on the delay determinants
Full text linkThe railway system is a fundamental component of the economy of most countries, since it has the capability to transport every day millions of passengers as well as millions of dollars’ worth of goods from origin to destination. According to many empirical works and papers, rail, which produces very low CO2 emissions, is one of the most environmentally friendly and safe transportation modes. Moreover, it is appreciated for its high energy efficiency. One of the most common and frequent issue about rail transport is the concept of arrival time, that is of punctuality and delay. The aim of the paper is twofold: it firstly provides a critical literature review on delay categories as a starting point for the development of a new, easy and complete classification of delay based on the link between motivations, causes and responsibility. Secondly, applying this classification, a panel data analysis with fixed effects has been performed to understand motivation and responsibility of the delay on an important Italian interregional railway line. Moreover, the application of survival analysis is used to understand the failure time probability of a train journey and to estimate the percentage of trains that arrive to a destination
L’attrattività della Lombardia nel settore della logistica. Quali ricadute sul territorio?
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Price-based and motivation-based policies for sustainable urban commuting: an agent-based model
No full textThe paper aims to assess the potential impact of different public policies for transport sustainability on the commuters’ mode choice in an urban area and on the associated PM emissions. An agent-based model simulates the choice of the transport means by a sample of Italian urban commuters according to the means relative price, social influence dynamics, psychological dimensions, and the policy intensity. The results show that the price-based policies seem less effective than the preference-based ones and that the best outputs are produced by a combination of the two policies, which allows a more efficient utilization and management of scarce public and private resources
Il veterinario ispettore e la tutela della salute pubblica dal rischio di contaminazione da xenobiotici
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