1,720,997 research outputs found
”Relationship between variations of mechanical properties of AISI 9840 steel and hydrogen content”.
No full textThe relationship between hydrogen content and induced embrittlement of AISI 9840 steel has been studied. In particular, the reduction in area during tensile tests has been compared with the hydrogen content of the specimen, splitting the hydrogen content between the different temperature at which it can be extracted. It has been found that only hydrogen contained in traps from which it can be extracted at 400 °C is dangerous and reduces the toughness of the materia
Comportamento ad usura di un sinterizzato trattato a vapore ed impregnato
No full textSinterizzati Hoganas a densità di 6,5g/cm3 trattati a vapore e
impregnati in olio hanno dato interessanti risultati nel minimizzare l'usur
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Roman, Ostrogothic and Byzantine coins from the castrum of Loppio - S. Andrea (Trento-Italy)
No full textSince 1998 the Museo Civico di Rovereto-Archaeological Department has been carrying out excavation campaigns at the site of Loppio - S. Andrea, in the Regione Trentino in Northern Italy. The unearthed masonry structures in the dig areas named A and B are parts of a late antique-early medieval forti ed settlement (castrum), characterized by a sequence of different build- ing phases going back to the 6th and 7th centuries. Many nds belonging to weaponry and soldiers equipment suggest that this site, strategically located along the ancient route going from the Adige Valley to the North Garda Lake, was settled for military reasons and housed soldiers with their families. A total amount of 90 coins has been found, mainly consisting of late Roman bronze specimens which served as local small change currency; Gothic and Byzantine coins in silver and gold are also well attested, offering a very representative view of integration of old 4th-5th centuries issues in the trimetallic 6th century monetary system, as well of their re-use within the Lom- bard society
Comportamento ad usura di un sinterizzato trattato a vapore e impregnato
No full textIn questa ricerca è stato prodotto un sinterizzato ferroso ossidato a vapore e successivamente impregnato in olio
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