22 research outputs found
Roadmap per la realizzazione di caserme “smart” in uso all’Arma dei Carabinieri, quale punti di resilienza delle Smart City, sviluppo sostenibile al servizio delle P.A. e del cittadino. Il Caso della Caserma “T. Porcelli” di Bari
No full textL'attività di dottorato discussa in questo documento si è svolta tra il 2019 e il 2022 e, nonostante il periodo della pandemia, purtroppo disagevole dal punto di vista di spostamenti e difficoltà di accesso al materiale archivistico e bibliografico, ha beneficiato nella fase finale della possibilità di partecipare a diversi tavoli permanenti delle forze armate italiane guidati da un obiettivo comune, condiviso sia a livello europeo che internazionale: la lotta al cambiamento climatico. La neutralità climatica entro il 2050 rappresenta un obiettivo ambizioso che mira a ridurre al minimo le emissioni di gas serra per bilanciare l'impatto delle attività umane sul clima. Questo obiettivo richiede una trasformazione profonda dei settori energetici, industriali, agricoli e dei trasporti, nonché una riconfigurazione dei modelli di consumo e produzione, ma anche un ripensamento dei modelli insediativi esistenti. Negli ultimi anni, la governance, l'industria e la ricerca hanno giocato un ruolo importante nell'accelerare la transizione verde e la concettualizzazione delle smart city e dei loro domini emergenti. Per raggiungere la neutralità climatica, sono necessarie però azioni concrete per ridurre le emissioni di gas serra. Ciò implica l'adozione di politiche e misure che promuovono l'energia pulita e rinnovabile, l'efficienza energetica e la transizione verso processi produttivi più sostenibili. Questa tesi, nel contesto dell'aumento della competitività delle città italiane, si pone come obiettivo quello di approfondire le relazioni tra un distretto militare, i suoi edifici e il quartiere della città in cui si trova proponendo, sulla base di un progetto pilota, delle linee guida per la realizzazione di uno “smart military district”.The doctoral activity discussed in this paper took place between 2019 and 2022 and, despite the pandemic period, unfortunately inconvenient from the point of view of travel and difficulties in accessing archival and bibliographic material, benefited in the final phase from the opportunity to participate in several permanent tables of the Italian armed forces guided by a common goal, shared both at the European and international level: the fight against climate change. Climate neutrality by 2050 represents an ambitious goal to minimize greenhouse gas emissions to balance the impact of human activities on the climate. This goal requires a profound transformation of the energy, industrial, agricultural, and transportation sectors, a reconfiguration of consumption and production patterns, and a rethinking of existing settlement patterns. In recent years, governance, industry, and research have played an essential role in accelerating the green transition and conceptualizing smart cities and their emerging domains. However, concrete actions are needed to achieve climate neutrality to reduce greenhouse gas emissions. This implies adopting policies and measures that promote clean and renewable energy, energy efficiency, and the transition to more sustainable production processes. This thesis, in the context of increasing the competitiveness of Italian cities, aims to investigate the relationship between a military district, its buildings, and the city neighborhood in which it is located by proposing, based on a pilot project, guidelines for the implementation of a "smart military district.
Prototyping a digital twin. A case study of a "U-shaped" military building
No full textThe aim of the article is to cover part of the issues related to develop a process aimed at defining some essential step to correctly plan a ‘smart district’ that could dispatch energy produced in excess to the
district’s other buildings. The first step has been to search for a type of building with very similar characteristics, such as geometry, zones, with the obvious variant of the geographic localization and
thermal behaviour, on the other hand, a certain computational approach has to be set, in order to achieve a further replicable and scalable approach to a small-scale urban building energy modelling (UBEM).
Focusing on various characteristics, a standard ‘U-shaped’ building, belonging to a ‘military district’ in a southern city of Italy (Bari), has been chosen as a case study. In order to obtain energy informa-
tion, the authors have started investigating first the basic components of the building through measures, thermal imaging, heat flux sensor, borescope, secondly a BIM model has been set and then enhanced to a Building Energy Model (BEM) trying to replicate the energy behaviour of the case study as close as possible. Although many technological innovations are emerging, the ‘BIM to BEM process’ and the ‘BEM analysis process’ itself still depends on too many variables and results on several experiments conducted showed a variation of up 26%, that probably could be improved only by a rigorous/hybrid workflow through a digital twin
CHCN) reactions and implications for combustion and extraterrestrial environments
No full textAcrylonitrile (CH2CHCN) is ubiquitous in space (molecular clouds, solar-type protostars, circumstellar envelopes) and is also abundant in the upper atmosphere of Titan and in comets. The reaction O(3P) + CH2CHCN can be of relevance in the chemistry of extraterrestrial environments because of the abundance of atomic oxygen. The oxidation of acrylonitrile is also relevant in combustion, because the thermal decomposition of pyrrolic and pyridinic structures present in fuel-bound nitrogen generates many nitrogen-bearing compounds, including acrylonitrile. Despite its relevance, limited information exists on this reaction. We report on a combined experimental and theoretical investigation of the reactions of acrylonitrile with both ground 3P and excited 1D atomic oxygen. From product angular and time-of-flight distributions in crossed molecular beam experiments with mass spectrometric detection at the collision energy, Ec, of 31.4 kJ/mol, we have identified the primary reaction products and determined their branching fractions (BFs). Theoretical calculations of the relevant triplet and singlet potential energy surfaces (PESs) were performed to assist interpretation of the experimental results and elucidate the reaction mechanism. Adiabatic statistical calculations of product BFs for the decomposition of the main triplet and singlet intermediates have been carried out. Combining the experimental and theoretical results, we conclude that the O(3P) reaction leads to two main product channels: (i) CH2CNH (ketenimine) + CO (dominant, BF = 0.87±0.05), formed via efficient intersystem crossing from the entrance triplet PES to the underlying singlet PES, (ii) HCOCHCN + H (minor, BF = 0.13±0.05), occurring adiabatically on the triplet PES. Our study suggests to include this reaction both as a possible destruction pathway of CH2CHCN and a possible formation route of CH2CNH in the interstellar medium. The O(1D) + CH2CHCN reaction mainly leads to formation of CH2CNH + CO adiabatically on the singlet PES. This result can improve models related to the chemistry of interstellar ice and cometary comas, where O(1D) reactions are believed to play a role. Overall, our results are expected to be useful to improve models of combustion and extraterrestrial environments
Intersystem crossing in the entrance channel of the reaction of O(3P) with pyridine
No full textTwo quantum effects can enable reactions to take place at energies below the barrier separating reactants from products: tunnelling and intersystem crossing between coupled potential energy surfaces. Here we show that intersystem crossing in the region between the pre-reactive complex and the reaction barrier can control the rate of bimolecular reactions for weakly coupled potential energy surfaces, even in the absence of heavy atoms. For O(P-3) plus pyridine, a reaction relevant to combustion, astrochemistry and biochemistry, crossed-beam experiments indicate that the dominant products are pyrrole and CO, obtained through a spin-forbidden ring-contraction mechanism. The experimental findings are interpreted-by high-level quantum-chemical calculations and statistical non-adiabatic computations of branching fractions-in terms of an efficient intersystem crossing occurring before the high entrance barrier for 0-atom addition to the N-atom lone pair. At low to moderate temperatures, the computed reaction rates prove to be dominated by intersystem crossing
Beyond bannock: Revitalizing traditional Indigenous foodways to support Indigenous identity and culture.
No full textTraditional foods (TF) play an important role in cultural identity and access to them promotes good health and wellbeing. In this study a phenomenological research approach was used to examine how Indigenous people living or working in Winnipeg, experience cultural food security.
First Nations participants (n=10) were identified by both a snowball and poster advertisement method through Indigenous education institutions with which the author was associated. The findings of this phenomenological study were that participants who identified as First Nations (n=10) in Winnipeg perceived themselves as culturally food insecure. Urbanization, costs associated with hunting, acquiring and transporting TF and lack of political and sociocultural supports contribute to the diminishing knowledge base around TF, making access and use of them in the city challenging.
This research suggests urban First Nations are food insecure in what they consider to be traditional foods from their cultural territories/regions. This would suggest that formal and land based education by ecozones could increase awareness of what they consider to be their traditional foodways. Summer programming on the land and waters of their traditional territories may be an avenue for reconciliation by ensuring the survival of their cultural foodways, increasing cultural food security and ultimately, food sovereignty even for city dwellers.February 202
Crossed beams and theoretical study on two reactions relevant to Titan's atmosphere: N(2D) + propyne and N(2D) + allene
No full textWe have investigated the N(2D) + CH3CCH (propyne) reaction and the N(2D) + H2CCCH2 (allene) reaction to elucidate the nature of the primary products and the micromechanism at play [Experimental] by coupling the crossed molecular beams (CMB) technique with mass spectrometric detection and time-of-flight analysis (angular distribution and tof spectra)
[Theoretical] with electronic structure calculations of stationary points and product energetics (potential energy surface, PES). Furthermore, RRKM statistical calculations were performed to derive the product branching ratios (BRs) under the conditions of the present experiments and of the atmosphere of Titan.This work was supported by the Italian Space Agency (DC-VUM-2017-034, Grant n° 2019-3 U.O Life in Space) and the Marie Sklodowska-Curie project ``Astro-Chemical Origins" (ACO), grant agreement No 811312
Modern Physics Quantum Session Question and Answer
No full textStudents in Modern Physics (PHYS-207W) created video presentations in the style of an APS conference. This question and answer session, with five student presenters, is moderated by Dr. Ross Martin-Wells. If you have any questions for these presenters, please contact the corresponding author at [email protected]
