An aerothermodynamic design optimization framework for hypersonic vehicles

In the aviation field great interest is growing in passengers transportation at hypersonic speed. This requires, however, careful study of the enabling technologies necessary for the optimal design of hypersonic vehicles. In this framework, the present work reports on a highly integrated design environment that has been developed in order to provide an optimization loop for vehicle aerothermodynamic design. It includes modules for geometrical parametrization, automated data transfer between tools, automated execution of computational analysis codes, and design optimization methods. This optimization environment is exploited for the aerodynamic design of an unmanned hypersonic cruiser flying at M∞=8 and 30 km altitude. The original contribution of this work is mainly found in the capability of the developed optimization environment of working simultaneously on shape and topology of the aircraft. The results reported and discussed highlight interesting design capabilities, and promise extension to more challenging and realistic integrated aerothermodynamic design problems

The origin of Mooij correlations in disordered metals

Sufficiently disordered metals display systematic deviations from the behavior predicted by semi-classical Boltzmann transport theory. Here the scattering events from impurities or thermal excitations can no longer be considered as additive independent processes, as asserted by Matthiessen's rule following from this picture. In the intermediate region between the regime of good conduction and that of insulation, one typically finds a change of sign of the temperature coefficient of resistivity (TCR), even at elevated temperature spanning ambient conditions, a phenomenology that was first identified by Mooij in 1973. Traditional weak coupling approaches to identify relevant corrections to the Boltzmann picture focused on long distance interference effects such as "weak localization", which are especially important in low dimensions (1D, 2D) and close to the zero temperature limit. Here we formulate a strong-coupling approach to tackle the interplay of strong disorder and lattice deformations (phonons) in bulk three-dimensional metals at high temperatures. We identify a polaronic mechanism of strong disorder renormalization, which describes how a lattice locally responds to the relevant impurity potential. This mechanism, which quantitatively captures the Mooij regime, is physically distinct and unrelated to Anderson localization, but realizes early seminal ideas of Anderson himself, concerning the interplay of disorder and lattice deformations

CSI-based fingerprinting for indoor localization using LTE Signals

Abstract This paper addresses the use of channel state information (CSI) for Long Term Evolution (LTE) signal fingerprinting localization. In particular, the paper proposes a novel CSI-based signal fingerprinting approach, where fingerprints are descriptors of the "shape" of the channel frequency response (CFR) calculated on CSI vectors, rather than direct CSI vectors. Experiments have been carried out to prove the feasibility and the effectiveness of the proposed method and to study the impact on the localization performance of (i) the bandwidth of the available LTE signal and (ii) the availability of more LTE signals transmitted by different eNodeB (cell diversity). Comparisons with other signal fingerprinting approaches, such as the ones based on received signal strength indicator or reference signal received power, clearly show that using LTE CSI, and in particular, descriptors as fingerprints, can bring relevant performance improvement

AS FÁBULAS NO MUNDO INFANTIL

Na literatura são encontrados os mais diversos gêneros textuais e estes têmgrande relevância no processo de ensino aprendizagem de língua materna, tanto naEducação Infantil quanto nos Anos Iniciais do Ensino Fundamental. Na pesquisabibliográfica, realizada no primeiro semestre de 2014, na 5ª fase do Curso de Pedagogia,deu-se ênfase a um único gênero, as fábulas, elegendo-se como temática orientadora depesquisa “As fábulas no mundo infantil”. Objetivou-se, ao longo da pesquisa,compreender a importância das fábulas no processo de ensino aprendizagem de línguamaterna. Buscou-se entender o contexto histórico das fábulas, conhecer os principaisfabulistas e fábulas e, sobretudo, refletir acerca das características desse gênero textual.Todo esse estudo serviu de base ao planejamento e execução do estágio de decência, napré-escola (segundo semestre de 2014), com o objetivo de despertar nas crianças ointeresse e o gosto pela leitura de fábulas, possibilitando, assim, através desse gênerotextual trabalhar valores (respeito, solidariedade, cooperação, gentileza...); nos anosiniciais do ensino fundamental, especificamente no 1º ano (primeiro semestre de 2015),teve-se como objetivo introduzir a leitura e a escrita por meio do gênero textual fábulas,recriando um mundo mágico para a alfabetização e letramento; no estágio de gestão(segundo semestre de 2015), realizado com crianças do 1º, 2º e 3º anos, foi possívelverificar, por meio da subtema “Leitura e escrita no fantástico mundo do circo”, como agestão escolar pode contribuir no processo pedagógico e desenvolver as habilidades e ogosto pela leitura nos educandos. Ao longo dos estágios procurou-se desenvolverhabilidades relacionadas à oralidade, à leitura e à escrita. Buscou-se trabalhar fábulaspara que, dessa forma, as crianças pudessem compreendê-las e, assim, fazer relação como contexto, com o seu mundo e, também, via fábulas, compreender os mecanismos daleitura e da escrita. Nesse período, foi possível compreender a importância de se ter umplanejamento e que os conteúdos estejam interligados, favorecendo a construção deconhecimentos de uma forma mais integrada. É preciso, pois, que o educador estejaatento, observando seus alunos em todos os sentidos e nas mais variadas ações, paraque, assim, possa detectar o que precisa melhorar ou até mesmo o que deve sereliminado. Salienta-se, portanto, que os estágios foram de relevada importância, poisteve-se a oportunidade de estar em contato com a prática, podendo, dessa forma,vivenciar o dia a dia da sala de aula e da gestão escolar

Right to the Future. Ideas Kit for the Future of Palermo

info:eu-repo/semantics/publishedVersio

Kaon physics with the KLOE detector

In this paper we discuss the recent finalized analyses by the KLOE experiment at DA$\Phi$NE: the CPT and Lorentz invariance test with entangled $K^0 \bar{K}^0$ pairs, and the precision measurement of the branching fraction of the decay ${ K^+} \rightarrow \pi^+\pi^-\pi^+(\gamma)$. We also present the status of an ongoing analysis aiming to precisely measure the $K^{\pm}$ mass

International Benchmark Activity in the Field of Sodium Fast Reactors

Global interest in fast reactors has been growing since their inception in 1960 because they can provide efficient, safe, and sustainable energy. Their closed fuel cycle can support long-term nuclear power development as part of the world’s future energy mix and decrease the burden of nuclear waste. In addition to current fast reactors construction projects, several countries are engaged in intense R&D and innovation programs for the development of innovative, or Generation IV, fast reactor concepts. Within this framework, NINE is very actively participating in various Coordinated Research Projects (CRPs) organized by the IAEA, aimed at improving Member States’ fast reactor analytical simulation capabilities and international qualification through code-to-code comparison, as well as experimental validation on mock-up experiment results of codes currently employed in the field of fast reactors. The first CRP was focused on the benchmark analysis of Experimental Breeder Reactor II (EBR-II) Shutdown Heat Removal Test (SHRT-17), protected loss-of-flow transient, which ended in the 2017 with the publication of the IAEA-TECDOC-1819. In the framework of this project, the NINE Validation Process– developed in the framework of NEMM (NINE Evaluation Model Methodology) – has been proposed and adopted by most of the organizations to support the interpretation of the results calculated by the CRP participants and the understanding of the reasons for differences between the participants’ simulation results and the experimental data. A second project regards the CRP focused on benchmark analysis of one of the unprotected passive safety demonstration tests performed at the Fast Flux Test Facility (FFTF), the Loss of Flow Without Scram (LOFWOS) Test #13, started in 2018. A detailed nodalization has been developed by NINE following its nodalization techniques and the NINE validation procedure has been adopted to validate the Simulation Model (SM) against the experimental data of the selected test. The third activity deals with the neutronics benchmark of China Experimental Fast Reactor (CEFR) Start-Up Tests, a CRP proposed by the China Institute of Atomic Energy (CIAE) launched in 2018 the main objective of which is to improve the understanding of the start-up of a SFR and to validate the fast reactor analysis computer codes against CEFR experimental data. A series of start-up tests have been analyzed in this benchmark and NINE also proposed and organized a further work package focused on the sensitivity and uncertainty analysis of the first criticality test. The present chapter intends to summarize the results achieved using the codes currently employed in the field of fast reactor in the framework of international projects and benchmarks in which NINE was involved and emphasize how the application of developed procedures allows to validate the SM results and validate the computer codes against experimental data

L’utilizzo di tecnologie head-mounted display a supporto della didattica attraverso ambienti di apprendimento virtuali in contesti non formali

COM (International Council of Museum) defines a museum as a permanent institution in the service of society and its development, open to the public, which acquires, conserves, researches, communicates and exhibits the tangible and intangible heritage of humanity and its environment for the purposes of education, study and enjoyment. This statement seems to emphasize how a museum can be an education institution that embedded an educational project. Considering this (and reminding a progressive introduction of protocols and agreements between the Italian Ministry of Education, University and Research (MIUR) and national, regional as well as provincial museums), in 2015 the Department of Humanities, Philosophy and Education of the University of Salerno (DISUFF) and the Virtual Archaeological Museum of Herculaneum (MAV) signed a scientific cooperation agreement oriented to develop and implement methods, tools and inclusive educational technologies. The first project, of this cooperation, consists in the realization of an Edugame, usable through the virtual reality Oculus Rift technology (one of the types of headmounted display present on the market) set inside the MAV 3D model of Villa of the Papyri in Herculaneum. The game is realized to be explorative and interactive, that link the Italian archeological museums systems and didactic necessity to improve the teaching-learning process for the users of the Edugame. In this regard, the use of head-mounted display technologies, can offer a good support to teaching-learning process due to virtual learning environments in non-formal contexts.L’ICOM (International Council of Museum) definisce un museo un’istituzione permanente al servizio della società e del suo sviluppo, aperto al pubblico che acquisisce, conserva, ricerca, comunica ed espone ai fini dello studio. Questa affermazione sembra mettere in risalto come la didattica museale può essere considerata uno strumento di ricerca e di istruzione, incorporando al suo interno un progetto educativo. Sulla base di quanto esposto e in considerazione di una progressiva introduzione di protocolli d’intesa tra il Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR) e musei nazionali, regionali e provinciali, nel 2015 il Dipartimento di Scienze Umane, Filosofiche e della Formazione dell’Università degli Studi di Salerno e il Museo Archeologico Virtuale (M.A.V.) hanno stipulato una convenzione di cooperazione scientifica orientata a sviluppare e implementare metodi, strumenti e tecnologie didattiche inclusive volte alla fruizione di alcune delle opere presenti nel M.A.V. Il progetto consistenella realizzazione di un Edugame, fruibile attraverso lo strumento di realtà virtuale Oculus Rift (una delle tipologie di head-mounted display presenti sul mercato), ambientato nella riproduzione 3D della “Villa dei Papiri” di Ercolano. Il gioco presenta un’architettura esplorativa, interattiva e didattica volta a fornireall’utenza un prodotto che garantisca una comunicazione tra il sistema museale e archeologico italiano e il processo di insegnamento-apprendimento garantendo un’esperienza didattica. In tal senso, l’utilizzo di tecnologie head-mounted display, possono offrire un valido supporto alla didattica grazie ad ambienti diapprendimento virtuali, in contesti non formali

Penile metastasis from primary cholangiocarcinoma: the first case report

BACKGROUND: Metastatic penile carcinoma derived from cholangiocarcinoma (CCA) has not been previously reported in the literature. Common metastatic sites for CCA include the regional lymph nodes and adjacent organs. CCAs are not highly vascularised tumours, making hematogenous metastases uncommon. Hematogenous CCA metastases commonly occur at distant organs such as the lungs, adrenal glands, and bones. Median survival for patients with metastatic disease is generally less than 1 year. CASE PRESENTATION: A 74-year-old Caucasian man consulted us after having undergone penile ultrasonography for pain and increased thickness at the base of the penis after self-examination. The patient presented with a history of hepatitis C-related cirrhosis and intrahepatic CCA, diagnosed 3 years previously. A biopsy of the corpora cavernosa on both sides revealed a carcinoma harbouring the same histological and immunophenotypical features as the primary hepatic lesion. CONCLUSIONS: To date, there is no case of penile or urogenital system metastasis from CCA described in the literature. Therefore, this article represents the first case report of penile metastasis from CCA

Space-based Global Maritime Surveillance. Part I: Satellite Technologies

Maritime surveillance (MS) is crucial for search and rescue operations, fishery monitoring, pollution control, law enforcement, migration monitoring, and national security policies. Since the early days of seafaring, MS has been a critical task for providing security in human coexistence. Several generations of sensors providing detailed maritime information have become available for large offshore areas in real time: maritime radar sensors in the 1950s and the automatic identification system (AIS) in the 1990s among them. However, ground-based maritime radars and AIS data do not always provide a comprehensive and seamless coverage of the entire maritime space. Therefore, the exploitation of space-based sensor technologies installed on satellites orbiting around the Earth, such as satellite AIS data, synthetic aperture radar, optical sensors, and global navigation satellite systems reflectometry, becomes crucial for MS and to complement the existing terrestrial technologies. In the first part of this work, we provide an overview of the main available space-based sensors technologies and present the advantages and limitations of each technology in the scope of MS. The second part, related to artificial intelligence, signal processing and data fusion techniques, is provided in a companion paper, titled: "Space-based Global Maritime Surveillance. Part II: Artificial Intelligence and Data Fusion Techniques" [1].Comment: This paper has been submitted to IEEE Aerospace and Electronic Systems Magazin