Inhomogeneous asymmetric exclusion processes between two reservoirs: large deviations for the local empirical observables in the mean-field approximation

For a given inhomogeneous exclusion processes on N sites between two reservoirs, the trajectories probabilities allow to identify the relevant local empirical observables and to obtain the corresponding rate function at level 2.5. In order to close the hierarchy of the empirical dynamics that appear in the stationarity constraints, we consider the simplest approximation, namely the mean-field approximation for the empirical density of two consecutive sites, in direct correspondence with the previously studied mean-field approximation for the steady state. For a given inhomogeneous totally asymmetric model, this mean-field approximation yields the large deviations for the joint distribution of the empirical density profile and of the empirical current around the mean-field steady state; the further explicit contraction over the current allows to obtain the large deviations of the empirical density profile alone. For a given inhomogeneous asymmetric model, the local empirical observables also involve the empirical activities of the links and of the reservoirs; the further explicit contraction over these activities yields the large deviations for the joint distribution of the empirical density profile and of the empirical current. The consequences for the large deviations properties of time-additive space-local observables are also discussed in both cases.

Marketing strategies for tourist destinations of the canton sucre

This study aims to generate reflection processes on the factors that influence the inclusion / exclusion processes of older adults who live in the Sergio Toral 1 cooperative in the city of Guayaquil to promote their participation and integration in their territory. This research represents a contribution to the city of Guayaquil, since it will not only benefit older adults, but, in turn, will deconstruct erroneous perceptions that society presents about aging, hoping that, through this process, direct, educate and transform the community into an inclusive group, leaving aside prejudices and stereotypes deeply rooted in culture. The research has a qualitative design with an exploratory scope. The data were collected through the application of surveys to the elderly, the inhabitants of the community (neighborhood actors), the interviews applied to the elderly, the observation and the social cartography constructed with the neighborhood leaders. Factors such as insecurity, lack of infrastructure, lack of accessible health centers, and fractured communication and interaction circuits between the population of the sector and the elderly affect the perception of exclusion of this age group.

Stuck and Exploited Refugees and Asylum Seekers in Italy Between Exclusion, Discrimination and Struggles

This volume analyses exclusion processes, segregation dynamics and the forms of discrimination of refugees and asylum seekers in Italy, where the reception system is marked by opaqueness and arbitrariness and is becoming increasingly similar to the model of “camps”. The numerous vibrant contributions present a fully-fledged system of inferiorization, characterised by labour exploitation, housing discomfort, meagre rights and control strategies, exacerbated by the COVID-19 pandemic, which has led to a sharp worsening of the health, work, housing and administrative conditions. A framework that has found opposition in the daily resistance and in the struggles of asylum seekers.

Architectures of contemporary digital platforms in education. Analysis of exclusion processes

The Internet is a wide, open and dynamic ecosystem of digital platforms where people and technologies contribute to the creation and consumption of digital information. The convergence of the Internet and the accelerated change of technological innovation have been the engines of society and its development, and all this has caused transformations in the social, economic and educational context. In this context, this work analyzes contemporary digital platform architectures and their influence on the processes of educational exclusion. To meet the objectives, the crucial changes brought about by digitally mediated life are studied; the conceptual and technological aspects that characterize contemporary digital platform architectures; and its influence on exclusion processes. This research is supported by qualitative research methodologies; the analysis and synthesis methods, the PRISMA model, and a meta-analysis of data extracted from the Scopus databases and the Web of Science-WOS is also carried out. The work shows changes in the social and educational context given the consolidation of the Internet through contemporary digital platform architectures and its influence on the processes of social, digital and educational exclusion. The need to promote equal opportunities, active participation and the capacity for professional insertion between women and men is visualized.

Mapping current and activity fluctuations in exclusion processes: consequences and open questions

Considering the large deviations of activity and current in the Asymmetric Simple Exclusion Process (ASEP), we show that there exists a non-trivial correspondence between the joint scaled cumulant generating functions of activity and current of two ASEPs with different parameters. This mapping is obtained by applying a similarity transform on the deformed Markov matrix of the source model in order to obtain the deformed Markov matrix of the target model. We first derive this correspondence for periodic boundary conditions, and show in the diffusive scaling limit (corresponding to the Weakly Asymmetric Simple Exclusion Processes, or WASEP) how the mapping is expressed in the language of Macroscopic Fluctuation Theory (MFT). As an interesting specific case, we map the large deviations of current in the ASEP to the large deviations of activity in the SSEP, thereby uncovering a regime of Kardar--Parisi--Zhang in the distribution of activity in the SSEP. At large activity, particle configurations exhibit hyperuniformity [Jack et al., PRL 114, 060601 (2015)]. Using results from quantum spin chain theory, we characterize the hyperuniform regime by evaluating the small wavenumber asymptotic behavior of the structure factor at half-filling. Conversely, we formulate from the MFT results a conjecture for a correlation function in spin chains at any fixed total magnetization (in the thermodynamic limit). In addition, we generalize the mapping to the case of two open ASEPs with boundary reservoirs, and we apply it in the WASEP limit in the MFT formalism. This mapping also allows us to find a symmetry-breaking dynamical phase transition (DPT) in the WASEP conditioned by activity, from the prior knowledge of a DPT in the WASEP conditioned by the current.