1,721,061 research outputs found
Note di saluto / Greeting notes
Full text linkL'introduzione al volume di F. Leoni e F. Novelli inquadra il lavoro nella collana "La Cultura della Città" (di cui sono direttore) e introduce ai temi del recupero e valorizzazione dello Smallpox Hospital di New York, oggetto di ricerche ed esercitazioni progettuali con gli studenti dei corsi di laurea in Architettura del Politecnico di Torino e di altre Scuole italiane e straniere
Roosevelt Island, treasure island. Roosevelt Island, l'isola del tesoro
No full textIl volume raccoglie gli studi e gli approfondimenti sviluppati nell'ambito del workshop promosso dall'Accademia Adrianea di Architettura e Archeologia onlus a New York, nel programma delle iniziative inerenti le attività di Master itinerante in Museografia, Architettura e Archeologia, Progettazione Strategica e Gestione Innovativa delle Aree Archeologiche, negli anni dal 2012 al 2018. Il percorso di ricerca sul tema è stato quindi approfondito e integrato nel corso di attività didattiche e di tesi di laurea magistrale condotte negli anni 2017-2019 al Politecnico di Milano e al Politecnico di Torino.
Le riflessioni metodologiche hanno quindi inteso indagare il delicato tema della conservazione e tutela di Smallpox Hospital e la riconfigurazione del suo contesto ambientale in un confronto dialettico tra le normative di tutela americane e un approccio al restauro e all'adaptive reuse più tipicamente europeo
1-(arylalkyl)quinolizidine derivatives and thio-isosteric analogs as ligands for sigma receptors
No full textA set of 1-(arylalkyl)quinolizidines, isosteric thio analogs, and variously functionalized congeners were synthesized and tested for affinity to sigma1 and sigma2 receptor subtypes, by displacing [3H]-(+)-pentazocine and [3H]DTG from guinea pig brain and rat brain prepns., resp. All compds. exhibited a good affinity for the sigma1 subtype, with subnanomolar Ki values for the best of them, while only modest or poor affinity for the sigma2 subtype was obsd. Some structure-activity relationships were put forward
Quinolizidine derivatives as ligands for sigma receptors
No full textA set of 1α/1β-[(4-R-phenyl)ethyl]quinolizidines was synthetized and together with selected intermediates was tested for affinity to sigma-1 receptor. Some compounds displayed good affinity for the relevant receptor, with Ki in the nanomolar range, and good selectivity versus σ2, 5-HT2A and D2 receptor subtypes
Synthesis and biological investigations of 1-(tetrahydropyran-2'-yl)- and 1-(tetrahydrofuran-2'-yl)benzimidazoles and 1/2-(tetrahydropyran-2'-yl)- and 1/2-(tetrahydrofuran-2'-yl)benzotriazoles
No full textSets of benzimidazole and benzotriazole derivatives bearing on position 1 or 2 a tetrahydrofuranyl or tetrahydropyranyl moieties were prepared through the addition of the suitable benzazoles on 2,3-dihydrofuran and 3,4-dihydro-2H-pyran. The reactions were carried on either without solvent or in carbon tetrachloride solution. In the last case some peculiar chlorinated side products were isolated and characterized. Twenty compounds were screened for in vitro antitumoral and anti-HIV-1 activities and found poorly active or completely inactive. On the other hand several compounds exhibited good tracheal relaxant activity in vitro; compound 8, 11, 16, 24 and 26 resulted more active than theophylline in this test, while compound 11 was comparable to amrinone till the concentration of 3 micrograms/ml. Finally, compound 5 resulted endowed with a strong diuretic and saluretic activity at the dose of 3 mg/Kg, thus representing a new lead for discovering new diuretic agents
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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