Asimmetria del rischio sistematico dei titoli immobiliari americani: nuove evidenze econometriche

In this work we have found a relevant increase in the systematic risk of the American real estate securities in the year 2007 which go to the initial values in the year 2009. With the aim to evaluate the systematic risk we have used the Fama-French three factor model and we have studied the relationship between the extra-return of the REIT index where we have used as proxy the American real estate securities and the extra return of the S&P500 index representative by the market portfolio return. The results confirmed the presence of an “Asymmetric Beta Puzzle” in agreement with other previous studies. At the same time the results have shown that the REIT securities behaved as speculative securities. In the past the same securities were considered conservative in the year of the subprime crisis. The REIT securities in particular have amplified arriving to double the variations of the market risk premium

Asimmetria del rischio sistematico dei titoli immobiliari americani: nuove evidenze econometriche

In this work we have found a relevant increase in the systematic risk of the American real estate securities in the year 2007 which go to the initial values in the year 2009. With the aim to evaluate the systematic risk we have used the Fama-French three factor model and we have studied the relationship between the extra-return of the REIT index where we have used as proxy the American real estate securities and the extra return of the S&P500 index representative by the market portfolio return. The results confirmed the presence of an “Asymmetric Beta Puzzle” in agreement with other previous studies. At the same time the results have shown that the REIT securities behaved as speculative securities. In the past the same securities were considered conservative in the year of the subprime crisis. The REIT securities in particular have amplified arriving to double the variations of the market risk premium

Le trame invisibili. Nuove modalità di esplorazione online dell’Archivio storico della psicologia italiana

The paper describes an innovative visualization modality to present online contents and relationships of the web portal of the Interdipartimental Research Center Aspi – Historical Archive of Italian Psychology (Milano-Bicocca University). Established in 2005, Aspi is aimed to preserve, inventory, digitize and valorize psychologists and psychiatrists documents of the XIX and XX centuries. The web portal www.aspi.unimib.it offers direct access to documental sources with critical notes and historical and scientific contextualization cards to describe biographies and disciplinary evolution, interdisciplinary and institutional connections and personal relationships among protagonists. The portal is a performing research tool for historians and scholars, which enables a direct access to the archival sources. It also allows contributors to collaborate with the editorial committee by publishing their research results. A custom software directly access the open source DB CollectiveAccess to extract data and visualize them dynamically and interactively, according to three main criteria: people, places and time. In particular, gravitational graphs show relationships between individuals (e.g. scholar, professor, co-worker, relative), between people and locations where they worked. Timelines and maps show on the other hand birth/death places and birth/death dates, where institutions were located and when they were operating

Diversity in nutrient content and consumer preferences of sensory attributes of peanut (Arachis hypogaea L.) varieties in Ugandan agroecosystems

The cultivated peanut (Arachis hypogaea L.) is one of the most widely consumed legumes globally due to its nutrient content, taste, and affordability. Nutrient composition and consumer preference were determined for twenty local farmer (landrace) and commercial peanut varieties grown in the Nakaseke and Nakasongola districts of the central wooded savanna of Uganda through sensory and laboratory evaluation. Significant differences in nutrient content (p < 0.05) among peanut varieties were found within and across sites. A significant relationship between nutrient content and consumer preference for varieties within and across sites was also realized (Wilk’s lambda = 0.05, p = 0.00). The differences in nutrient content influenced key organoleptic characteristics, including taste, crunchiness, appearance, and soup aroma, which contributed to why consumers may prefer certain varieties to others. Gender differences in variety selection were significantly related to consumer preference for the crunchiness of roasted peanut varieties (F = 5.7, p = 0.016). The results imply that selecting different varieties of peanuts enables consumers to receive different nutrient amounts, while experiencing variety uniqueness. The promotion of peanut intraspecific diversity is crucial for improved nutrition, organoleptic appreciation and the livelihood of those engaged in peanut value chains, especially for the actors who specialize in different peanut products. The conservation of peanut diversity will ensure that the present and future generations benefit from the nutritional content and organoleptic enjoyment that is linked to unique peanut varieties

Heterogeneity in Nutritional and Biochemical Composition of Cassava Varieties in Uganda

Cassava (Manihot esculenta Crantz) has been prioritized by the New Partnership for African Development to spur development in Africa. However, the nutritional and biochemical composition of the cassava diversity has not been adequately assessed to inform the various user needs.  Comparative analysis of macro, micro nutrients and biochemical composition of sixteen varieties of cassava in Uganda was undertaken following standard analytical techniques. Results showed significant differences in macro nutrients (p ≤0.000)  except carbohydrate, starch and amylose contents. With the exception of Calcium and Iron, the varieties were significantly different (p ≤0.000) in micronutrient composition.  The Cyanide and dry matter content were also significantly different (p ≤0.000) among the varieties. Overall, Mukibi, Juguja, Bao, Nigeria,  ranked highest in dry matter, cyanide, macro and micronutrients content, respectively. Therefore varieties differ in nutritional and biochemical composition; information crucial in the development of new varieities and deployment of cassava diversity in various  value chains

Inattività fisica tra società (post)moderna e stile di vita

Today’s society is characterized by inter-human relations network increasinglyglobalized; rapid transformation of everyday life dictated by new technologies;productivity and trade continues to increase. Everything generates a educationaldistance between generations whit the result of adults against the growing subjects.The latter are increasingly victims of consumerism and technology, withoutmaking movement, physical activity, sports. Consequently, society, perhaps because responsible for all this, finally wonders about issues related to such behaviors, as a result, produce physical inactivity, laziness, lack of exercise, overweight and obesity whit all associated pathological complications.La società odierna è caratterizzata da rete di rapporti interumani sempre più globalizzata;rapidità di trasformazione della vita quotidiana dettata dalle nuove tecnologie;produttività e scambi commerciali in continuo aumento. Tutto ciò generauna distanza pedagogico-educativa tra le generazioni con la conseguenza di disattenzionedegli adulti nei confronti dei soggetti in crescita. Questi ultimi risultanosempre più vittime del consumismo e della tecnologia, senza più praticare movimento,attività motoria, sport. Di conseguenza, la società, forse perché responsabiledi tutto questo, finalmente s’interroga su problematiche relative a tali comportamentiche, come esito, producono inattività fisica, pigrizia, sedentarietà,sovrappeso e obesità con tutte le complicanze patologiche connesse

The archaeal elongation factor EF-2 induces the release of aIF6 from 50S ribosomal subunit

The translation factor IF6 is a protein of about 25 kDa shared by the Archaea and the Eukarya but absent in Bacteria. It acts as a ribosome anti-association factor that binds to the large subunit preventing the joining to the small subunit. It must be released from the large ribosomal subunit to permit its entry to the translation cycle. In Eukarya, this process occurs by the coordinated action of the GTPase Efl1 and the docking protein SBDS. Archaea do not possess a homolog of the former factor while they have a homolog of SBDS. In the past, we have determined the function and ribosomal localization of the archaeal (Sulfolobus solfataricus) IF6 homolog (aIF6) highlighting its similarity to the eukaryotic counterpart. Here, we analyzed the mechanism of aIF6 release from the large ribosomal subunit. We found that, similarly to the Eukarya, the detachment of aIF6 from the 50S subunit requires a GTPase activity which involves the archaeal elongation factor 2 (aEF-2). However, the release of aIF6 from the 50S subunits does not require the archaeal homolog of SBDS, being on the contrary inhibited by its presence. Molecular modeling, using published structural data of closely related homologous proteins, elucidated the mechanistic interplay between the aIF6, aSBDS, and aEF2 on the ribosome surface. The results suggest that a conformational rearrangement of aEF2, upon GTP hydrolysis, promotes aIF6 ejection. On the other hand, aSBDS and aEF2 share the same binding site, whose occupation by SBDS prevents aEF2 binding, thereby inhibiting aIF6 release