1,720,971 research outputs found
Auricchio F, Bari E, Conti M, Perteghella S, Scocozza F, Sorlini M, Torre ML. Scaffold per la rigenerazione tissutale, in particolare per la rigenerazione ossea, e relativo metodo di fabbricazione.
No full textFarmers-to-consumers: An example of sustainable soilless horticulture in Urban and Peri-Urban areas
No full textAs urban populations rise, new strategies to address nutritional requirements are needed. People moving from rural areas often end up in the suburbs, facing severe poverty and unbalanced nutrition. Improving urban agricultural production is constrained by limited access to fertile land, but the introduction of low cost hydroponic gardens may be a sustainable way to launch horticultural production on roofs, terraces and courtyards. Gardens also perform a social function, restoring the associative mentality lost when emigrants leave their communities. In this study, we propose the adoption of community hydroponic gardens as a tool to overtake poverty, improve nutrition and increase associative attitude. A democratic organization of women farming groups, together with the role of a technical assistance centre is described. Agricultural production is managed by the groups, where both intercropping patterns for home consumption and commercial leafy vegetable production are conducted. Fresh produce for the market is washed and packaged and sold to supermarkets and restaurants in the city. The technical assistance centre provides tutoring, agricultural inputs and manages commercial relations. Its sustainability is assured by a percent of the vegetable marketing income. It also offers training to students of local agricultural schools. A socioeconomic overview of the advantages created by the installation of community gardens is considered
FARMERS-TO-CONSUMERS PIPELINE: AN ASSOCIATIVE EXAMPLE OF SUSTAINABLE SOIL-LESS HORTICULTURE IN URBAN AND PERI-URBAN AREAS.
No full textAs urban populations rise, new strategies to address nutritional requirements are needed. People moving from rural areas often end up in the suburbs, facing severe poverty and unbalanced nutrition. The improvement of urban agricultural production is constrained by reduced access to fertile land. The introduction of low cost hydroponic gardens may be a sustainable way to launch horticultural production in roofs, terraces and courtyards. Gardens also play social functions, restoring the associative mentality lost when emigrants left their communities. In this study, we propose the adoption of community hydroponic gardens as a tool to overtake poverty, improve nutrition and increase associative attitude. A democratic organization of women farming groups, together with the role of a technical assistance centre is shown. Agricultural production is managed by the groups, where both intercropping patterns for home consumption, and commercial leafy vegetable production are carried on. Fresh produce for the market is washed and packaged and sold to main supermarkets and restaurants of the city. The technical assistance centre provides tutoring, agricultural inputs and manages commercial relations, and its sustainability is assured by a rate of the vegetable marketing income. It also offers training to students of local agricultural schools. A socio-economic overview of the advantages created by the installation of community gardening is also considered. We will hereby report our results in Latin America, proposing the model to other contexts
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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Scaffold per la rigenerazione tissutale, in particolare per la rigenerazione ossea, e relativo metodo di fabbricazione
No full textEffect of hydroxyapatite and pulsed electromagnetic field on osteogenic differentiation of human stem cells seeded onto 3D-printed polycaprolactone scaffolds for future bone graft transplantation
No full textBone graft transplantation is a risky procedure mainly due to postoperative complications. Tissue engineering is an alternative to regenerating bone tissue by seeding mesenchymal stem cells into 3D scaffolds by osteoinductive signaling. Poly(ε-caprolactone) (PCL) is one of the most used biopolymers for fabricating scaffolds for bone tissue engineering. PCL is enriched with hydroxyapatite (HA) to promote the production of the bone-mineralized matrix. Moreover, the application of pulsed electromagnetic fields (PEMFs) on scaffolds loaded with HA can significantly benefit collagen and HA networks favoring the interaction between organic and mineral phases of bones. In this context, we investigated, for the first time, the effect exerted by a PEMF exposure on the osteogenic differentiation of human adipose stem cells (hASCs) seeded onto 3D printed PCL-HA scaffolds and cultured in growth and osteogenic medium (OM). After 21 days of culture, the results showed excellent colonization of scaffolds and the deposition of extracellular matrix (ECM) secreted by hASCs. Immunofluorescence staining confirmed the deposition of collagen type I and osteopontin both on scaffolds. Gene expression analysis indicated that both HA crystal and PEMF treatment were able to trigger osteogenic differentiation, as documented by the increase of osteogenic markers. These results suggest that HA, osteogenic factors, and PEMFs converge on the same signaling pathways as there are no additive effects and no change in protein synthesis between scaffolds with HA or treated with PEMFs for cells cultured in OM. The proposed study lays the foundations for exploring new approaches in bone graft transplantation
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