521 research outputs found
MOBILITY AND URBAN AREAS INTERCHANGE
Urban transportation today is matching more and more new needs for mobility due to the continuous change of urban functions. Nowadays, the concept of the city transcends the vision of a constructed and circumscribed space to reach the valence of a service system, linked by an infrastructure network which allows the same functionality. In this sense, mobility has suffered substantial modification in adapting to the changing needs of the local populations. Thus, the interpretation of urban mobility must change in satisfying three instances: the routes, means of transport, and mode change. Above all, the mode change needs to be adequately exploited to support new mobility. It is necessary to improve integration between different transfer modality, and to affect the propensity (favored by major guarantees of quality of travel) of the users to the use of public transport. This work is aimed to identify those parameters which are useful in planning an area where two or more transport networks can be employed. Thus, even if they are hierarchically different, they must be connected and their functions and equipment must be concentrated to facilitate the transition from one system of transport to another
Optimal randomness certification in the quantum steering and prepare-and-measure scenarios
Quantum mechanics predicts the existence of intrinsically random processes.
Contrary to classical randomness, this lack of predictability can not be
attributed to ignorance or lack of control. Here we find the optimal method to
quantify the amount of local or global randomness that can be extracted in two
scenarios: (i) the quantum steering scenario, where two parties measure a
bipartite system in an unknown state but one of them does not trust his
measurement apparatus, and (ii) the prepare-and-measure scenario, where
additionally the quantum state is known. We use our methods to compute the
maximal amount of local and global randomness that can be certified by
measuring systems subject to noise and losses and show that local randomness
can be certified from a single measurement if and only if the detectors used in
the test have detection efficiency higher than 50%.Comment: 11 pages, 6 figures. v2: Published versio
A Multiple Case Study Investigating Principles of Design and Implementation of Operational Safety Plans for Crises at Colleges, Universities, and Affiliated Institutions
In the wake of the 2007 Virginia Tech tragedy, the Virginia state legislature mandated that all college-affiliated institutions create an operational safety plan for natural and manmade crises. Previous empirical research has mostly focused on documenting faculty and studentsâ perceptions of campus safety, preparations for manmade crises over natural disasters, and enhancing specific aspects of emergency responses for future incidents. Thus, design and implementation âbest practicesâ for higher education operational safety plan protocols is an understudied, yet burgeoning area of inquiry. To address this literature gap, a comparative case study of five institutions was conducted using a novel document analysis protocol and interviews to analyze current operational safety plans through the lenses of open systems, rational choice, and chaos theories. Data revealed three guiding principles for design, four factors identified for successful implementation, and five candidate âbest practices,â which aligned with the training, emergency threat assessment, emergency management, resources, communication and coordination protocol themes. A practical implication from this study was that the selected institutions placed more attention on operational safety plan response elements than on preparation components, which may mean less than optimal plan execution. Moreover, a significant theoretical implication was the discovery that emergency managers rationalized their operational safety plan decisions based on perceived costs and benefits, which may deprive these plans of the most up-to-date, peer reviewed information. Future studies will contribute additional novel practical and theoretical guidance regarding the essential components for effective operational safety planning that would increase the capability of senior administrators and campus safety personnel to manage risks associated with emergency disasters
Urban regeneration and bioregionalism
The sustainable development and the bioregionalism find their meeting point in the
strategies of urban regeneration adoptable in the Campania Region. In the article, following
a brief consideration about possible scenarios of short chain to be triggered between the
agricultural and the building sector, three samples of experimental actions are described,
which are under development in three areas, in S. Arsenio in the Diano valley, in S. Antonio
Abate and in Naples. All the here presented cases are object of a collaboration between the
University (Research and education institution), the local authorities and the Small and
Medium Enterprises of the bioregions, which has led to application of those principles
within design proposals of sustainable and bioregionalist urban regeneration.
The sustainable development and the bioregionalism find their meeting point in the
strategies of urban regeneration adoptable in the Campania Region. In the article, following
a brief consideration about possible scenarios of short chain to be triggered between the
agricultural and the building sector, three samples of experimental actions are described,
which are under development in three areas, in S. Arsenio in the Diano valley, in S. Antonio
Abate and in Naples. All the here presented cases are object of a collaboration between the
University (Research and education institution), the local authorities and the Small and
Medium Enterprises of the bioregions, which has led to application of those principles
within design proposals of sustainable and bioregionalist urban regeneration
Necessary detection efficiencies for secure quantum key distribution and bound randomness
In recent years, several hacking attacks have broken the security of quantum
cryptography implementations by exploiting the presence of losses and the
ability of the eavesdropper to tune detection efficiencies. We present a simple
attack of this form that applies to any protocol in which the key is
constructed from the results of untrusted measurements performed on particles
coming from an insecure source or channel. Because of its generality, the
attack applies to a large class of protocols, from standard prepare-and-measure
to device-independent schemes. Our attack gives bounds on the critical
detection efficiencies necessary for secure quantum distribution, which show
that the implementation of most partly device independent solutions is, from
the point of view of detection efficiency, almost as demanding as fully
device-independent ones. We also show how our attack implies the existence of a
form of bound randomness, namely non-local correlations in which a
non-signalling eavesdropper can find out a posteriori the result of any
implemented measurement.Comment: 5 pages. v2: new title, published versio
Detection loophole attacks on semi-device-independent quantum and classical protocols
Semi-device-independent quantum protocols realize information tasks - e.g.
secure key distribution, random access coding, and randomness generation - in a
scenario where no assumption on the internal working of the devices used in the
protocol is made, except their dimension. These protocols offer two main
advantages: first, their implementation is often less demanding than
fully-device-independent protocols. Second, they are more secure than their
device-dependent counterparts. Their classical analogous is represented by
random access codes, which provide a general framework for describing one-sided
classical communication tasks. We discuss conditions under which detection
inefficiencies can be exploited by a malicious provider to fake the performance
of semi-device-independent quantum and classical protocols - and how to prevent
it.Comment: 13 pages, 1 figure, published versio
Tools for the analysis of the landscape structure and its configuration and resilience.
The st udy wi l l pr o po se an
application on Cilentoâs rural landscape to test a method of analysing the syntactical aspects and of identifying the
dynamics of transformation in order to control changes and to define those elements that are resilient to change and how
they can be modified to be consistent with emerging new needs. The perceptual dimension of the landscape is affected by
many factors that may give rise to numerous and different evaluations; the study, by identifying the syntactic elements
and the rules that govern the composition of a perspective system, allows the orderly return of what is recognized by the
experiential memory. The study is aimed to define tools in order to educate the residents to avoid insertions or removals,
booth natural or artificial components, inconsistent with the rules that govern the identity of the landscape
Robustness of Device Independent Dimension Witnesses
Device independent dimension witnesses provide a lower bound on the
dimensionality of classical and quantum systems in a "black box" scenario where
only correlations between preparations, measurements and outcomes are
considered. We address the problem of the robustness of dimension witnesses,
namely that to witness the dimension of a system or to discriminate between its
quantum or classical nature, even in the presence of loss. We consider the case
when shared randomness is allowed between preparations and measurements and we
provide a threshold in the detection efficiency such that dimension witnessing
can still be performed.Comment: 8 pages, 5 figures, published versio
The drivers of ecoâinnovations in small and mediumâsized enterprises: A systematic literature review and research directions
The debate on innovations that contributes to the decoupling of economic growth
and environmental degradation or fosters the transition from the brown to the green
economy is becoming increasingly relevant in the academic and business worlds, fuelling
a research stream that is proving very interesting for its economic, environmental
and social implications. Although the debate on the adoption of environmental
innovations is well underway, the discussion on eco-innovation in the context of
small- and medium-sized enterprises (SMEs) is at a less developed stage and deserves
more attention, especially given the relevance of these companies in the economic
system of several countries. Thus, this study proposes a systematic literature review
of the determinants of eco-innovation in SMEs and explores the relationships among
them by starting from the criticalities highlighted in the five literature reviews of
determinants of eco-innovations in SMEs that have been recently published. The first
step of the research concerns a detailed description of the selection process of the
articles under consideration and of their characteristics. In the second step, 14 main
categories of determinants are identified. Additionally, in the third step, as result of
this investigation, three basilar research directions and 13 related research questions
emerged
Physical constraints on global social-ecological energy system
Energy is the main driver of human Social-Ecological System (SES) dynamics. Collective
energy properties of human SES can be described applying the principles of statistical mechanics:
(i) energy consumption repartition; (ii) efficiency; (iii) performance, as efficient power, in relation to
the least-action principle. International Energy Agency data are analyzed through the lens of such
principles. Declining physical efficiency and growth of power losses emerge from our analysis.
Losses mainly depend on intermediate system outputs and non-energy final output. Energy performance
at Country level also depends on efficient power consumption. Better and worse performing
Countries are identified accordingly. Five policy-relevant areas are identified in relation to the physical
principles introduced in this paper: Improve efficiency; Decouple economic growth from environmental
degradation; Focus on high value added and labor-intensive sectors; Rationalize inefficient
fossil fuel subsidies that encourage wasteful consumption; Upgrade the technological capabilities.
Coherently with our findings, policies should support the following actions: (1) redefine sectoral
energy distribution shares; (2) Improve Country-level performance, if needed; (3) Reduce intermediate
outputs and non-energy final output; (4) Reduce resources supply to improve eco-efficiency
together with system performance
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