Search results for "Nature"
showing 10 items of 1564 documents
Genesi geometrica delle volte centriche
1996
Un'analisi completa degli organismi voltati comporta lo studio delle molteplici componenti necessarie alla loro definizione: configurazione geometrica, sistema costruttivo, area storico-geografica di appartenenza, interpretazioni Stilistiche. L’obiettivo di questo studio è indirizzato all' analisi delle volte continue su pianta centrica definibili attraverso le leggi della geometria euclidea. L’indagine si pone all'interno dei confini relativi alla loro configurazione geometrica e il criterio adottato, svincolato da classificazioni di carattere tipologico o stilistico, propone l'identificazione di famiglie geometriche in base alla figura del poligono di base dell'impianto. Si può identifica…
Interrelationships between mycorrhizal symbiosis, soil pH and plant sex modify the performance of Antennaria dioica
2010
AM symbiosis is usually beneficial for plants, but the benefits gained may depend on the soil abiotic factors. In dioecious plants, female and male individuals have different resource demands and allocation patterns. As a consequence of these differences, it is logical to assume that female and male plants differ in their relationship with arbuscular mycorrhizal (AM) fungi, although this has rarely been examined. We used a factorial greenhouse experiment to investigate whether female and male plants in the dioecious model species Antennaria dioica have a different relationship with their AM symbionts under two soil pH levels. In particular, we asked: (1) Do the sexes in A. dioica have sex-s…
Vasi d'autore: il caso dell'Acropoli di Atene
2017
Il saggio affronta il problema delle firme apposte sui vasi, proponendo un approccio contestuale che valuti il fenomeno anche in relazione alla ‘committenza’, oltre che all’interno delle varie botteghe e attività artigianali, e in rapporto all’insieme figurativo, alle altre eventuali iscrizioni presenti sull’oggetto e alla tipologia e tettonica del vaso. Si analizza, in particolare, il caso dell’Acropoli di Atene, come primo contesto-campione (di ambito cultuale), particolarmente significativo per la perfetta coincidenza tra centro di produzione e contesto d’uso delle ceramiche e per l’incidenza dell’area sacra poliadica nella fabbrica dei vasi figurati della città e nelle dinamiche socio-e…
The role of punishment in the works of Adam Smith
2009
The reformation of criminal justice is one of the great themes in Enlightenment culture and concerned its main exponents from Montesquieu to Beccaria, Filangieri, Bentham. One of the traits of greater modernity in the theories worked out by juridical Enlightenment is the resort to the utilitarianinspired economic analysis. Adam Smith doesn't back out of this scientific and civil commitment, but his doctrine appears significantly different though contemporary to juridical Enlightenment, and is also based on economic argumentations. In this work we will look through the main writings which contain the Smithian thought in search of those parts dealing with the theme of punishment and its socia…
Assessing drought vulnerability and adaptation among farmers in Gadaref region, Eastern Sudan
2018
Agricultural productivity in rural areas is severely affected by climate variability, and this elevates the vulnerability of rural households to food insecurity. This study examines the socio-economic vulnerability of farmers who are susceptible to droughts in the five agricultural-based regions of Gadaref, Eastern Sudan. A survey was carried out in 500 households to collect data on socio-economic and livelihood indicators. The data analyzed from these indicators were used to generate the three components of drought vulnerability: exposure, sensitivity and adaptive capacity. The analysis revealed that the regions deemed to be most vulnerable to both drought and climate variability were also…
The role of parasitism in adaptive radiations – when might parasites promote and when might they constrain ecological speciation?
2012
Research on speciation and adaptive radiation has flourished during the past decades, yet factors underlying initiation of reproductive isolation often remain unknown. Parasites represent important selective agents and have received renewed attention in speciation research. We review the literature on parasite-mediated divergent selection in context of ecological speciation and present empirical evidence for three nonexclusive mechanisms by which parasites might facilitate speciation: reduced viability or fecundity of immigrants and hybrids, assortative mating as a pleiotropic by-product of host adaptation, and ecologically-based sexual selection. We emphasise the lack of research on specia…
Theodor W. Adorno e il concetto di seconda natura nel Doktor Faustus di Thomas Mann
2018
“Doktor Faustus” of Thomas Mann, as explained by its author, is a novel on German civilization in which music plays the role of paradigm. Nevertheless the author grasps a lot of quotations from different disciplines and topics, ― e.g., theology, policy, philosophy, music, chemistry ― with the aim of depicting the creation of a second nature in music according the rules of twelve-note composition established by Arnold Schoenberg. The starting point of this complicated narrative is the reinterpretation of Theodor W. Adorno’s “Philosophie der neuen Musik”, a book that inspired Mann in tracing the idea of “second nature” created by the composer Adrian Leverkühn. The article focuses on some keyw…
Is endometrial receptivity transcriptomics affected in women with endometriosis? A pilot study
2015
Endometrial receptivity is still questioned today in women with endometriosis. The aim of this study was to assess the endometrial receptivity gene signature in patients with different stages of endometriosis by investigating transcriptomic modifications of their endometrium using the endometrial receptivity array (ERA) test. A prospective, interventional multicentre pilot trial was designed and implemented in two university-affiliated infertility units from Belgium and Spain. Gene expression microarray was used to diagnose the receptivity status by quantifying the expression of 238 specific genes directly related to human endometrial receptivity. Unsupervised hierarchical clustering showed…
Comparison of RNA-seq and microarray-based models for clinical endpoint prediction
2015
Background Gene expression profiling is being widely applied in cancer research to identify biomarkers for clinical endpoint prediction. Since RNA-seq provides a powerful tool for transcriptome-based applications beyond the limitations of microarrays, we sought to systematically evaluate the performance of RNA-seq-based and microarray-based classifiers in this MAQC-III/SEQC study for clinical endpoint prediction using neuroblastoma as a model. Results We generate gene expression profiles from 498 primary neuroblastomas using both RNA-seq and 44 k microarrays. Characterization of the neuroblastoma transcriptome by RNA-seq reveals that more than 48,000 genes and 200,000 transcripts are being …
Motor recruitment during action observation: Effect of interindividual differences in action strategy
2020
Abstract Visual processing of other’s actions is supported by sensorimotor brain activations. Access to sensorimotor representations may, in principle, provide the top-down signal required to bias search and selection of critical visual features. For this to happen, it is necessary that a stable one-to-one mapping exists between observed kinematics and underlying motor commands. However, due to the inherent redundancy of the human musculoskeletal system, this is hardly the case for multijoint actions where everyone has his own moving style (individual motor signature—IMS). Here, we investigated the influence of subject’s IMS on subjects’ motor excitability during the observation of an actor…