1,729,429 research outputs found
Modelli e analisi statistiche per dati da centraline di monitoraggio: l'esperienza di Taranto.
No full textIn questo lavoro proponiamo una rassegna di studi sulla qualità dell‟aria nell‟area metropolitana di
Taranto. Le misure delle concentrazioni di PM10 rese disponibili da ARPA Puglia presentavano
elementi di complessità quali dati mancanti e diversi criteri di validazione per diverse reti di
centraline. Questo duplice problema è stato affrontato con tre strategie alternative, di cui si è
confrontata la performance, sfruttando la natura spaziale dei dati nell‟ambito del paradigma
inferenziale bayesiano [1]. Successivamente si è considerata l‟interpolazione spazio-temporale delle
superfici di concentrazione giornaliere di PM10 sull‟area considerata, tramite un modello basato su
kriging bayesiano e caratterizzato dall‟uso di dati meteorologici e da una correlazione spaziale
semiparametrica [2]. Analogamente si sono ricostruite le superfici giornaliere delle concentrazioni
di tre inquinanti (SO2, NO2 e PM10) visti come un unico oggetto multivariato [3]. La
considerazione, per ciascun inquinante, di modelli gerarchici bayesiani univariati con struttura
spazio-temporale separabile, ha permesso di imputare i dati mancanti nell‟ambito del procedimento
di stima [4]. Allo scopo di collocare sul territorio le principali sorgenti emissive di PM10 [5], si è
proposto un modello a recettori multivariato spaziale che considera la correlazione temporale e
l‟influenza della meteorologia sui contributi delle sorgenti e la correlazione spaziale nell‟ambito di
profili emissivi composizionali [6]. Infine si è effettuata un‟analisi della diffusione spaziale e
dell‟evoluzione temporale di 46 contaminanti del PM10 (diossine, PCB, IPA) basata sulle
concentrazioni mensili in corrispondenza di tre centraline di monitoraggio. A causa dell‟elevata
dimensionalità dei dati, si è adottata una strategia descrittiva basata su tecniche di riduzione
riconducibili al diagramma duale [7].
Bibliografia
[1] A. Pollice, G. Jona Lasinio, Journal Of Data Science, 43-59, 7 (2009).
[2] A. Pollice, G. Jona Lasinio, Environmental Monitoring and Assessment, 177-190, 162 (2010).
[3] A. Pollice, G. Jona Lasinio, Environmetrics, 741-754, 21 (2010).
[4] S. Arima, L. Cretarola, G. Jona Lasinio, A. Pollice, Statistical Methods & Applications, 75-91,
21 (2012).
[5] A. Pollice, Environmetrics, 35-41, 22 (2011).
[6] A. Pollice , G. Jona Lasinio, Environmental and Ecological Statistics, doi: 10.1007/s10651-011-
0173-0 (2011).
[7] A. Pollice, V. Esposito, Spatial2 - Spatial Data Methods for Environmental and Ecological
Processes. Foggia - Baia delle Zagare (I), 1-2 settembre 2011 (2011)
jona-sassenhagen/rerp_review: Revision 1
No full text<p>The code at the stage of the first submission. To be updated.</p>
Le Franc français et la récente crise monétaire européenne
Get PDFThe French Franc and the Recent European Currency Crisis by Cecilia Jona-Lasinio
The 1992 and 1993 currency crises demonstrated the enormous pressures that can be raised against official exchange rate parities when investors perceive that significant exchange rate realignments may be imminent. In this paper I propose an empirical analysis of the 1 992- 1 993 crises to establish whether speculators were able to perceive the exact timing of the devaluations and if and how the economic and political news influenced their devaluation expectations. In particular, I analyse the expected timing of devaluation of the French Franc relative to the Deutschemark before the 1 992 and 1 993 currency crisis. The empirical analysis shows that before the occurrence of both crisis agents were awareof the imminence of the devaluation and that they were very sensitive to the news spread daily over the markets.Le franc français et la récente crise monétaire européenne par Cecilia Jona-Lasinio
Les crises monétaires de 1992 et 1993 ont prouvé que des pressions extrêmement fortes peuvent s'exercer sur les parités officielles lorsque les investisseurs réalisent que des réalignements monétaires importants sont peut-être imminents. Dans ce document, je présente une analyse empirique des crises de 1992-1993 visant à déterminer d'une part si les spéculateurs sont capables de prévoir exactement à quel moment des dévaluations vont intervenir, et d'autre part si les informations sur l'actualité politique et économique influencent leurs anticipations et dans l'affirmative, de quelle façon. En particulier, j'effectue une analyse des anticipations de la date de la dévaluation du franc français par rapport au deutsche mark avant les crises monétaires de 1992 et de 1993. L'analyse empirique montre qu'avant le déclenchement de ces deux crises, les investisseurs se rendaient compte que la dévaluation était imminente et qu'ils étaient très sensibles aux informations diffusées quotidiennement sur les marchés.Jona-Lasinio Cécilia. Le Franc français et la récente crise monétaire européenne. In: Économie & prévision, n°140-141, 1999-4-5. Economie des marché financiers. pp. 147-159
Transições de fase na matéria de quarks magnetizada com repulsão vetorial
Get PDFTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Física, Florianópolis, 2015.Neste trabalho investigamos as transições de fase na matéria de quarks magnetizada usando o modelo de NJL com dois sabores na presença de acoplamento vetorial repulsivo (GV). Verificamos que a contribuição vetorial produz o encolhimento da linha de transição de primeira ordem e pode favorecer o mecanismo de back-bending no regime de acoplamento forte. Este fato permite conciliar alguns resultados da rede com as previsões teóricas sobre a existência de um ponto crítico no diagrama de fases da QCD. Analisamos como a ação de um campo magnético (B) intenso na matéria de quarks tende a fortalecer a região de primeira ordem e que também determina um padrão oscilatório na densidade. Concluímos que os efeitos opostos do acoplamento vetorial e do campo magnético na restauração da simetria quiral levam a um desdobramento de múltiplas fases magnetizadas. A ação combinada de B e GV pode originar linhas de coexistência no diagrama de fases que apresentam um comportamento exótico similar ao observado para a transição sólido-líquido da água. Mostramos como a influência da repulsão vetorial deve estabilizar fases magnéticas de densidade intermediária e que certas combinações dos parâmetros B e GV determinam pontos triplos no diagrama de fases. Exploramos as propriedades magnéticas anisotrópicas sobre os quarks e como a contribuição vetorial deve afetar a magnetização induzida determinando um comportamento diamagnético para o sistema.Abstract : In this work we investigate the phase diagram of dense magnetizedquark matter in the framework of the two-flavor Nambu-Jona-Lasiniomodel when a repulsive vector coupling (GV ) is present. We verifythat the vector contribution could shrink the first order transition lineand can support the back-bending mechanism under a strong couplingregime. This result allows one to conciliate some lattice results withtheoretical predictions about the existence of a critical point in theQCD phase diagram. Our analysis shows how an intense magnetic field(B) acts in the quark matter, strengthening the coexistence region inthe phase diagram and setting an oscillatory pattern in density values.The opposite effect of the vector coupling and magnetic field in thechiral symmetry restoration leads to a splitting of multiple magneticphases. The combined action of B and GV gives rise to coexistencelines which can render an exotic behavior resembling the solid-liquidtransition observed in the water phase diagram. We show how thevector repulsion stabilizes the intermediary magnetic phases and thatcertain B and GV parametric combinations can cause a triple point toappear in the phase diagram. We also study the anisotropic propertiesof magnetized quark matter and how the vector-like contribution affectsthe induced magnetization leading to a diamagnetic behavior
"Jona Sun"
No full textJapanese team "Jona Sun" on the 1996 World Solar Challenge starting grid, The Esplanade, Darwin, NT, 27 October 1996.Unknown
Fremde Welten im Buch Jona
Get PDFDas Buch Jona konstruiert auf vielfältige Weise "Fremdsein". Aus der Perspektive der Figur Jona bietet diese Erzählung einen Blick auf die Welt, die zunehmend fremder wird. Am Beispiel der Figur des Propheten reflektiert un rekonstruiert das Buch Jona verschiedene Konstruktionen von Fremdsein.Gillmayr-Bucher, Susann
Heritage tourism in the municipality of Beltinci and the importance of the authenticity of traditional events in tourism for the local environment
Get PDFNaraščajoč trend v turizmu je iskanje pristnih doživetij in spoznavanje pristne lokalne kulture, dediščine, kulinarike ter šeg in navad na obiskanih destinacijah. To so prvine, ki dajo destinaciji njeno edinstveno identiteto in konkurenčno prednost na turističnem trgu. Turistovo hrepenenje po pristnem doživetju lahko med drugim zadovoljimo s tematskimi prireditvami, ki nam omogočajo, da turistu v enem zaokroženem produktu predstavimo in izpostavimo ključne zanimivosti. Korektno prikazovanje dediščine na prireditvah je pri tem ključnega pomena, če pri gostih želimo ustvariti vtis pristnosti oziroma pristno izkušnjo. Prikazovanje nesnovne dediščine smo v tem delu preverjali na območju Občine Beltinci, kjer že več kot 50 let deluje kulturno-umetniško društvo, več kot 80 let pa neprekinjeno deluje folklorna dejavnost. Kot primer nesnovne dediščine smo obravnavali folklorno dejavnost, in sicer na primeru Mednarodnega folklornega festivala Beltinci (v nadaljevanju Festival). V raziskavi smo v sodelovanju z organizatorji festivala in delavci iz stroke izvedli polstrukturirane intervjuje ter ocenjevanje prikazovanja nesnovne dediščine na prireditvi. Ugotovili smo, da v Beltincih pri organizaciji kulturnih dogodkov skrbijo, da se ob prikazovanju čim bolj približajo pristni obliki nesnovne dediščine z upoštevanjem strokovnih priporočil. S takim ravnanjem organizatorji zagotavljajo, da obiskovalci destinacije dobijo pristno doživetje lokalne kulture. Na podlagi izvedene raziskave smo v zadnjem delu naloge pripravili še priporočila za nadaljnje delo na področju vključevanja nesnovne dediščine v turistične produkte (prireditve).A growing trend in the travel industry is the search for authenticity. Experiencing authentic local culture, heritage, cuisine and customs of a visited destination – these are the elements that give a destination its unique identity and competitive advantage on the tourism market. One of the ways through which we can satisfy the tourist\u27s longing for an authentic experience is through thematic events which enable us to present and highlight key attractions to the tourist in one rounded product. Genuine display of heritage at such events is crucial for insuring the tourist an authentic experience. In this thesis, we researched the authentic display of intangible heritage in the Municipality of Beltinci. We chose this area because of the local communities\u27 awareness for heritage. The cultural and artistic association has been operating in Beltinci for more than 50 years, the folklore dance activity has been operating continuously for more than 80 years and in 2020 the association would have organized the 50th International folklore festival (which was cancelled due to the covid-19 pandemic). In our thesis we looked at the folklore dance activity as an example of intangible heritage and conducted our research at the international folklore festival Beltinci. In the research, we conducted semi-structured interviews and evaluation of the display of living heritage at the event in cooperation with the festival organizers and professionals. We have concluded that organizers of Cultural events in Beltinci strive to present the local intangible heritage as close as possible to it\u27s authentic form. By doing so, they ensure that visitors of the destination receive an authentic experience of local culture. Based on the conducted research, in the last part of the thesis we prepared recommendations for further work in the field of integrating intangible heritage into tourist products (events)
CircSpaceTime: an R package for spatial and spatio-temporal modelling of circular data
Get PDFCircSpaceTime is the only R package, currently available, that implements Bayesian models for spatial and spatio-temporal interpolation of circular data. Such data are often found in applications where, among the many, wind directions, animal movement directions, and wave directions are involved. To analyse such data, we need models for observations at locations s and times t, as the so-called geostatistical models, providing structured dependence assumed to decay in distance and time. The approach we take begins with Gaussian processes defined for linear variables over space and time. Then, we use either wrapping or projection to obtain processes for circular data. The models are cast as hierarchical, with fitting and inference within a Bayesian framework. Altogether, this package implements work developed by a series of papers, by Jona Lasinio, Mastrantonio, Wang, and Gelfand. All procedures are written using Rcpp. Estimates are obtained by MCMC, allowing parallelized multiple chains run. The implementation of the proposed models is considerably improved on the simple routines adopted in the research papers. As original running examples, for the spatial and spatio-temporal settings, we use wind directions datasets over central Italy
Sefer ha-yirʾah
No full textshe-yasad ... rabi Yonah Girondi ..."Buch der Gottesfurcht", in JiddischDruckerangabe gemäss Titelnachweis der Zentralbibliothek Züric
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