1,720,965 research outputs found
Free Vibration Analysis of Ribbed Plates by a Combined Analytical-Numerical Method
No full textAn easy to code and computationally efficient analytical–numerical method for quick prediction of the modal characteristics of rectangular ribbed plates is presented. The approach is suitable for low-frequency free vibration analysis of thin rectangular plates reinforced by a small number of light stiffeners. The assumed-modes method is used to formulate the equations of motion of the plate and the rib separately. The motion of the built-up structure is then obtained by enforcing appropriate continuity conditions between the two. The resulting sparse generalized eigenvalue problem can be profitably solved by reliable methods to calculate only a small set of selected eigenmodes. An alternative formulation is also proposed for the single-ribbed case which leads to a compact analytical form of the frequency equation whose solution can be easily determined either graphically or numerically. The present method demonstrates good agreement with published results and standard finite element analysis
La collezione “Xylothomoteca Italica di Adriano Fiori nel Herbarium Porticensis (PORUN)
No full textGli autori descrivono l'entità della Xilotomoteca Fiori conservata presso il Museo delle Scienze Agrarie della Università Federico II
Human-nature relationships in the collections of the National Archaeological Museum of Naples: a botanical perspective
Full text linkThe portrayal of plants depicted in works of art in antiquity can provide insights into human–nature relationships. We have identified the botanical species sculpted on marble and stone and depicted on wall paintings, vases, mosaics, and furnishings in the National Archaeological Museum of Naples, which houses the greatest collection of Greco-Roman antiquities in the world. In detail, the main objectives of the present study were to analyse and discuss the symbolic role of some plants more strongly linked to a deity or involved in other aspects of Greco-Roman life and customs. The attention was particularly devoted to their symbolic role in mythology, their use in medical and ritual practices, their artistic meaning in domestic representations and their representation in Nilotic scenes.
URL: https://www.upjs.sk/pracoviska/botanicka-zahrada/odborne-aktivity/contents-abstracts
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
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