1,722,371 research outputs found
Rationalizability of field extensions with a view towards Feynman integrals
Full text linkIn 2021, Marco Besier and the first author introduced the concept of
rationalizability of square roots to simplify arguments of Feynman integrals.
In this work, we generalize the definition of rationalizability to field
extensions. We then show that the rationalizability of a set of quadratic field
extensions is equivalent to the rationalizability of the compositum of the
field extensions, providing a new strategy to prove rationalizability of sets
of square roots of polynomials.Comment: 13 pages, minor changes to improve the article. Same content as
published versio
Alimentazione e salute: Linee guida per il Consumatore Romagnolo. 26 novembre 2004, teatro Dante Alighieri, sala Corelli, Ravenna
No full textIn un incontro con la cittadinanza di Ravenna le linee guida per il cittadino romagnolo in tema di alimentazione e salute. L'incontro è organizzato dal Centro Ricerche sulla Nutrizione dell'Alma Mater insieme alla Fondazione del Monte di Bologna e Ravenna con il patrocinio del Comune di Ravenna.
Alimentazione e salute sono due termini fortemente legati tra loro e di grande attualità. Il legame è ancora più evidente in una zona come quella del romagnolo che può vantare una grande tradizione gastronomica. Ecco quindi che il Centro Ricerche sulla Nutrizione dell'Alma Mater ha scelto di organizzare venerdì 26 novembre a Ravenna un incontro proprio per parlare di alimentazione.
Il Centro Ricerche è costituito all'interno del Dipartimento di Biochimica "G.Moruzzi" ed ha come scopo quello di promuovere lo studio nel campo della nutrizione in riferimento alle problematiche legate all'educazione ed all'informazione nutrizionali. In quest'ottica è da leggersi l'incontro con la cittadinanza di venerdì 26, che nasce con l'obiettivo di elaborare le linee guida per il consumatore romagnolo proprio in tema di alimentazione e tutela della salute.
L'appuntamento è fissato per le ore 17 presso la sala Corelli del Teatro Dante Alighieri di Ravenna e prevede la presenza in qualità di relatori di quattro docenti dell'Alma Mater: Pierluigi Biagi (Dipartimento di Biochimica), Silvana Hrelia (Dipartimento di Biochimica), Patrizia Hrelia (Dipartimento di Farmacologia) e Davide Festi (Dipartimento di Medicina Interna e Gastroenterologia)
Reading comprehension in L2 Italian: connecting psycholinguistic research and pedagogical practice
Full text linkThe results of national evaluations (INVALSI, 2019; 2021) show that second-generation immigrant students often obtain lower scores than their native peers at tasks that involve reading comprehension and the use of advanced Italian language skills. These difficulties have consequences also on the educational experience of these students who tend to obtain lower grades and face higher drop-out rates. The present study aims to shed light on the origins of these comprehension difficulties. To this aim we carried out an experimental study that involved 109 pupils attending 4th and 5th grade of primary school. Among the participants, there were 61 language minority bilingual and 48 monolingual students. We analysed a series of linguistic and non-linguistic abilities that are considered potential predictors of reading comprehension, i.e., general cognitive abilities, decoding skills, receptive vocabulary, and receptive grammar. Among these measures, the two groups significantly differed only in vocabulary knowledge, confirming what emerged in previous studies with bilingual pupils. To identify which ability could more efficiently predict reading comprehension in the two groups, we conducted a Random Forest analysis. The results showed that, while vocabulary was the only predictor for monolingual students, the bilinguals’ performance was modulated also by receptive grammar, word decoding speed, and general cognitive abilities. These findings suggest that reading comprehension for bilingual students is affected by a less automatised access to lexical and grammar knowledge with respect to that of their native peers and that, consequently, text comprehension is likely to be more cognitively taxing for this population. Furthermore, our results highlight the relevance of lexical knowledge to achieve advanced reading comprehension skills, especially for bilingual students who tend to obtain lower scores in this domain. Vocabulary is acknowledged to be a key element that connects local and global comprehension processes, as suggested by the Reading Systems Framework (Perfetti & Stafura, 2014). Since grammar knowledge turned out to play a significant role in reading comprehension for bilinguals, we decided to examine on-line processing of specific complex structures (i.e., object relative clauses and passive voice). Using three Self-Paced Reading Tasks (SPRT), we explored three research questions concerning on-line language processing to verify whether there were behavioural differences between groups. We examined: (i) how morphological information that can facilitate the interpretation of sentences is processed; (ii) how the presence of pragmatically implausible situations can influence processing; and (iii) whether semantic violations affect processing. The analysis of reading times revealed that both groups followed similar processing patterns, but monolinguals obtained significantly higher scores in terms of accuracy. This seems to be consistent with Hopp’s Fundamental Identity Hypothesis (Hopp, 2007; 2010; 2014), suggesting that non-native processing is quantitatively different from native processing and, thus, requires greater cognitive effort. These results have also pedagogical implications because they highlight the importance of implementing teaching activities that support students in the development of a richer and more efficiently organised vocabulary and grammar knowledge. We tried to develop a teaching intervention aimed at developing the ability to use their grammatical skills in order to understand and produce meaningful language, instead of limiting language teaching to the presentation of a series of abstract rules to be practiced in formal exercises. Finally, we also carried out a series of experimental activities that aimed to practice the ability to make inferences, a skill employed during global processing. All the didactic activities developed and tested during the intervention aimed to stimulate the students’ metalinguistic awareness and encourage peer-to-peer interactions
Laeta Auspicia Salutaris Christi Nativitatis Sub Auspiciis Sacrosancti Festi Servatoris Natalitii Piae Meditationi Proponens Patronos Fautoresque Literarum, Cives Item Ill. Augustei, Ad Orationem Solemnem Primo Festi Die H. L. Q. C. Ex Promta Memoria Habendam, Qua Decet, Ratione
Full text linkLAETA AUSPICIA SALUTARIS CHRISTI NATIVITATIS SUB AUSPICIIS SACROSANCTI FESTI SERVATORIS NATALITII PIAE MEDITATIONI PROPONENS PATRONOS FAUTORESQUE LITERARUM, CIVES ITEM ILL. AUGUSTEI, AD ORATIONEM SOLEMNEM PRIMO FESTI DIE H. L. Q. C. EX PROMTA MEMORIA HABENDAM, QUA DECET, RATIONE
Laeta Auspicia Salutaris Christi Nativitatis Sub Auspiciis Sacrosancti Festi Servatoris Natalitii Piae Meditationi Proponens Patronos Fautoresque Literarum, Cives Item Ill. Augustei, Ad Orationem Solemnem Primo Festi Die H. L. Q. C. Ex Promta Memoria Habendam, Qua Decet, Ratione ([1]
A Calabi-Yau threefold coming from two black holes
Full text linkIn this paper, we show that a set of six square roots of homogeneous
polynomials in four variables, related to a binary system of black holes
studied by Stefan Weinzierl, is not rationalizable. We prove it by showing that
the variety associated to the product of four of the six square roots is
not unirational. In particular, we show that the smooth model of is a
Calabi-Yau threefold.Comment: V.2: Section 4 edited. Conjectures 4.25 and 4.31 changed. Exposition
overall (hopefully) improved. Main results untouched. Comments still welcom
Prorector Et Senatus Academiæ Kiloniensis Ad Festi Pentecostes solennem celebrationem Cives Academicos diligenter & serio invitant
No full textPRORECTOR ET SENATUS ACADEMIÆ KILONIENSIS AD FESTI PENTECOSTES SOLENNEM CELEBRATIONEM CIVES ACADEMICOS DILIGENTER & SERIO INVITANT
Prorector Et Senatus Academiæ Kiloniensis Ad Festi Pentecostes solennem celebrationem Cives Academicos diligenter & serio invitant ( - )
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Rector Academiae Lipsiensis Ad Festi Natalitii Salvatoris nostri Solennia Cives Academicos invitat
No full textRECTOR ACADEMIAE LIPSIENSIS AD FESTI NATALITII SALVATORIS NOSTRI SOLENNIA CIVES ACADEMICOS INVITAT
Rector Academiae Lipsiensis Ad Festi Natalitii Salvatoris nostri Solennia Cives Academicos invitat ([1])
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