1,721,062 research outputs found
«Giornale Iuav» n. 57, Architettura della costruzione
No full textLa strategia formativa del biennio di Architettura della Costruzione poggia su un assunto di fondo: l’architettura (cultura e prassi) deve perseguire una sintesi tra l’approfondirsi in se stessa e la realizzazione di un compito e uno scopo pubblici: un’antinomia imprescindibile, intellettualmente e tecnicamente, che rende l’architettura essenzialmente difficile (secondo un’efficace locuzione di Nicola Emery). Praticare la didattica dell’architettura entro questo antitetico binomio non significa assolutamente adeguare-ridurre la formazione a standard professionali correnti, ecc.: è perseguire l’autonomia di una cultura progettuale (ideazione e costruzione) fortemente connessa alla materialità del problema-progetto (bisogni-vincoli-risorse), è orientare la trasmissione di saperi e competenze secondo un modo di intendere la forma in architettura
A review on simple and highly sensitive plastic optical fiber probes for bio-chemical sensing
No full textA review on bio-chemical label-free sensing applications based on receptors combined with multimode plastic optical fibers (POFs) is carried out. In particular, this work focuses on different kinds of POF intrinsic sensors used in transmission mode, exploiting various types of receptors and useful in several application fields. The sensor structures and the sensing mechanisms of different simple, highly sensitive, and low-cost POF probes are reported and compared. Moreover, different kinds of chemical and biological receptors combined with POF probes, highlighting the advantages and disadvantages of each receptor, are presented in detail. More specifically, the chosen POF sensing platforms, including low-cost and simple interrogation setups, are described showing their ability to monitor specific receptors exploiting intensity variation techniques and plasmonic phenomena, as well. Finally, a prospect of future developments of biochemical sensors with multimode POFs is discussed
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
A molecularly imprinted polymer based spr sensor for 2-furaldehyde determination in oil matrices
No full textOptical chemosensors with surface plasmon resonance (SPR) transduction are widely employed, even in complex environments, such as those outside the laboratory. In this context, not only the chemical nature but also the physical form of the receptor layer is particularly relevant. Synthetic receptors as molecularly imprinted polymers (MIPs) are well suited. This is demonstrated here in the case of an SPR sensor platform based on a multimode plastic optical fiber, which is very promising for on site application due to the low dimensions and low cost. A specific MIP was used as the receptor, with high affinity for the substance to be determined, 2-furaldehyde, in water. Here, a medium of high refractive index, i.e., vegetable oil, was considered because of the high interest for its determination in industrial diagnostics. The effects of the MIP layer thickness and the washing extent on the quality of the analytical signal were investigated. Better spectra were generated at the thinner MIP layer, while a lower detection limit is reached with extended washing
Determination of cadmium(II), copper(II), manganese(II) and nickel(II) species in Antarctic seawater with complexing resins
No full textAdvances in plastic optical fiber bio/chemical sensors to realize point-of-care-tests
No full textThe characteristics of Plastic Optical Fibers (POFs) are exploited to realize simple, highly sensitive, and low-cost bio/chemical sensors via innovative schemes. The POF's multimode characteristic and the simple modification processes are used to obtain novel ultra-sensitive platforms that can be combined with different kinds of receptors (bio-mimetic or biological receptors) to detect specific substances in different ranges for several application fields. This review reports several POF platforms based on different optical transduction principles obtained via low-cost setups, such as surface plasmon resonance (SPR), localized SPR, lossy mode resonance, evanescent wave, and others. The reported sensor configurations are useful to understand how the balance of the combination of these two components (POF platforms and receptors) can produce the desired optimal performance of the POF-based bio/chemical sensor in terms of substance and detection range
Optical-chemical sensors based on plasmonic phenomena modulated via micro-holes in plastic optical fibers filled by molecularly imprinted polymers
No full textA novel optical chemical sensing approach is presented and successfully tested in this work. The device is based on modified plastic optical fibers (POFs), with molecularly imprinted polymers (MIPs) inside, coupled with a surface plasmon resonance (SPR) in POFs. The MIP is deposited in a microstructured POF platform which is used to launch the light into the SPR-POF sensor. Therefore, the SPR sensor is not directly in contact neither with the MIP layer, nor to the sample under examination and the sensor system has been made insensitive both to the MIP thickness and refractive index. The chemical sensing platform interacts with the analyte changing the effective refractive index of the POF core, and the SPR conditions at the SPR sensor. As a proof of concept, a MIP receptor specific for furfural (2-FAL) in water is used to realize the proposed sensing principle. A detection limit (LOD) of fractions of μg/l was obtained, about 2 orders of magnitude lower than that obtained with another SPR-POF sensor where the same MIP receptor was directly deposited upon the SPR-sensitive surface to detect 2-FAL in water
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
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