1,720,972 research outputs found
Il settore agroalimentare veronese in una prospettiva logistica.
No full textTutti i settori si stanno globalizzando: la dimensione globale è diventata propria anche per aree dell’economia e per imprese un tempo solo nazionali o al più continentali; è accaduto per l’elettronica di consumo, per automobili e motociclette, per abbigliamento di marca, perfino per bevande e prodotti alimentari, una volta considerati fra i beni che con maggiori difficoltà potevano distaccarsi dai mercati nazionali di riferimento. Ed è proprio a queste ultime che qui rivolgiamo la nostra attenzione. Affrontare il mercato globale significa essere consapevoli che le condizioni di sopravvivenza e sviluppo delle imprese passano attraverso il fatto che il cliente odierno chiede livelli sempre più alti di prestazione ai suoi fornitori, in particolare con riferimento al servizio di consegna.Ne consegue che le imprese devono riconoscere le esigenze di servizio dei diversi segmenti serviti e ristrutturare i loro processi logistici per coprire quelle esigenze. Una differenziazione basata su un migliore servizio al cliente offre la possibilità di eliminare la competizione basata sul prezzo.Ecco perché la logistica è divenuta il vero fattore di successo e di creazione di valore per il cliente. Un’impresa che riconoscesse validità alla considerazioni sin qui fatte non potrebbe che interrogarsi per capire come migliorare e ottimizzare i propri processi logistici, in termini non solo di servizio aziendale interno, ma anche in una prospettiva di coordinamento e collaborazione con i propri fornitori. La gestione della catena di fornitura (o Supply Chain Management) appare allora strumento imprescindibile per la competizione globale. Per realizzarla bisogna in primo luogo ricostruire la sequenza delle operazioni che partendo dalla materia prima permettono di consegnare al cliente finale il prodotto (o servizio o proposta di valore o soluzione). Ecco perché abbiamo pensato che se si vuol comprendere appieno le prospettive logistiche di un comparto appare prima necessario ricostruire la filiera. Nel prosieguo spieghiamo bene perché la filiera sia lo strumento più adeguato a ricostruire i complessi processi logistici che investono un settore o un comparto. Attraverso di essi sarà possibile al ricercatore o all’imprenditore definire i flussi fisici che si sviluppano nell’attività, conoscerne l’entità fisica ed il valore, sicché ne risulterà altresì definito il limite di sviluppo. I supporti sui quali infatti vengono movimentati i flussi fisici (infrastrutture, mezzi di trasporto, ecc.) sono per definizione scarsi ed hanno un limite al quale la loro capacità produttiva si esaurisce. Conoscere pertanto i flussi fisici di un area o sistema locale significa anche comprendere se quell’area o sistema potranno ulteriormente svilupparsi in futuro. Oppure, ma è il risvolto della stessa medaglia, permetterà di comprendere dove e quanto si dovrebbe investire (anche con denaro pubblico) per alzare il limite dello sviluppo. In questa sede non riusciremo a rispondere all’interrogativo proposto. Ne sviluppiamo tuttavia la necessaria premessa, dettata dalla analisi delle filiere del sistema agro-alimentare che interessano l’area veronese. Analizzeremo poi i flussi complessivi (in valore) che interessano i rapporti con l’estero di siffatto sistema e che, evidentemente, non esauriscono la dimensione del flusso stesso (per conoscere il quale è necessario ricostruire pure i flussi interni). Ciononostante è nostro obiettivo ricavare da tali analisi adeguate informazioni anche in ordine alle priorità di intervento (in particolare pubblico) a supporto delle attività logistiche delle imprese operanti nell’area veronese
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
Simvastatin acutely reduces ischemic brain damage in the immature rat via Akt and CREB activation
No full textWe have previously shown that simvastatin (Sim) has long-lasting neuroprotective effects in a neonatal model of hypoxia-ischemia. Herein we evaluated the neuroprotective effect of different doses and duration of Sim treatment and further addressed its mechanism of action. Neonatal rats were subjected to occlusion of the right carotid artery followed by 2.5 h hypoxia (hypoxia-ischemia, HI). Sim was given at the dose of 10 or 5 mg/kg, s.c. from postnatal day 1 (PN1) to PN7, or at 20 mg/kg from PN4 to PN7, or at 20 mg/kg in a single administration 18 h before the onset of the ischemic procedure. Low-dose treatments or a single administration of the drug were effective in reducing HI-induced brain damage and its behavioural outcomes. Sim increased both Akt and CREB phosphorylation in neuronal cells and treatment with wortmannin completely blocked neuroprotection and p-Akt. These data demonstrate that even a single prophylactic Sim administration protects from hypoxic ischemic brain damage and that neuroprotection is in part obtained by preserving Akt and Stimulating CREB phosphorylation in neuronal cells. Prophylactic Sim administration set in motion biochemical events that are known to increase brain tolerance to harmful factors, suggesting that the drug may exert neuroprotection by inducing pharmacological preconditioning
Simvastatin acutely reduces ischemic brain damage in the immature rat via Akt and CREB activation
No full textWe have previously shown that simvastatin (Sim) has long-lasting neuroprotective effects in a neonatal model of hypoxia-ischemia. Herein we evaluated the neuroprotective effect of different doses and duration of Sim treatment and further addressed its mechanism of action. Neonatal rats were subjected to occlusion of the right carotid artery followed by 2.5 h hypoxia (hypoxia-ischemia, HI). Sim was given at the dose of 10 or 5 mg/kg, s.c. from postnatal day 1 (PN1) to PN7, or at 20 mg/kg from PN4 to PN7, or at 20 mg/kg in a single administration 18 h before the onset of the ischemic procedure. Low-dose treatments or a single administration of the drug were effective in reducing HI-induced brain damage and its behavioural outcomes. Sim increased both Akt and CREB phosphorylation in neuronal cells and treatment with wortmannin completely blocked neuroprotection and p-Akt. These data demonstrate that even a single prophylactic Sim administration protects from hypoxic ischemic brain damage and that neuroprotection is in part obtained by preserving Akt and stimulating CREB phosphorylation in neuronal cells. Prophylactic Sim administration set in motion biochemical events that are known to increase brain tolerance to harmful factors, suggesting that the drug may exert neuroprotection by inducing pharmacological preconditioning
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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