1,721,070 research outputs found
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
Modèles optimaux pour la flexibilité des politiques et des capacités de la chaîne de logistique avec des demandes incertaines
No full textCette thèse étudie la conception d’optimisation de la flexibilité de la politique de logistique et de la capacité de logistique avec une demande incertaine. Ces flexibilités jouent un rôle crucial dans la performance en garantissant la qualité du produit et en maximisant le profit. Nous nous concentrons sur la conception de la capacité de politique de logistique et de la capacité de logistique. Cette recherche étudie trois problèmes d’optimisation: une conception de la politique de commande dans le contrat quantité-flexibilité et la conception de la capacité dans deux entrepôts.Nous examinons d’abord la chaîne logistique à deux échelons entre le constructeur automobile et le détaillant, où le détaillant achète des automobiles écologiques au constructeur automobile et reçoit la demande de ses clients respectueux de l’environnement. Nous établissons une politique de commande dans un contrat à flexibilité de quantité qui prend en compte les exigences écologiques. La politique considère que le constructeur automobiledétermine le niveau de verdissement et que le détaillant détermine le prix de vente au détail avant la signature du contrat. Nous construisons les modèles pour décrire ce contrat dans les chaînes logistiques décisionnelles décentralisées et centralisées. Nous optimisons le niveau de verdissement pour maximiser les profits du constructeur automobile et le prix de vente au détail avec une demande sensible au respect de l’environnement visant à maximiser lesprofits du détaillant. Nous considérons en outre la décision d’équilibre entre le niveau de verdissement et le prix de détail pour maximiser les bénéfices de la chaîne logistique.Nous concevons ensuite les capacité s des robots et des cueilleuses dans un système RMFS (Robotic Mobile Fulfillment System), présenté par plusieurs robots soulevant et transportant des é tagres de stockage de meubles depuis les grilles de stockage jusqu’aux préparateurs de commandes. Nous construisons des modèles de Markov de grande-dimension pour décrire ce système avec des classes de clients, calculons le débit de ce système en fonction du nombre de robots et fournissons des règles de conception permettant de déterminer le nombre optimal de robots et leurs capacités, en tenant compte du compromis entre des robots. Nous vérifions les résultats analytiques des modèles de Markov avec des simulations. Nous consiérons en outre RMFS à sélecteur multiple et étudions sa conception optimale. Un autre objectif de la conception des capacités dans RMFS est considéré. Nous construisons des modèles de réseau de files d’attente pour décrire le système RMFS à l’aide de deux protocoles de partage de robots pour les sélecteurs, proposons les algorithmes correspondants, effectuons des analyses numériques et évaluons les performances du système RMFS en calculant letemps de traitement. Nous calculons ensuite le nombre et la vitesse optimaux des robots et fournissons les règles de conception efficaces pour RMFS.Enfin, nous concevons le stockage public. La conception des entrepôts de stockage publics doit s’adapter aux segments du marché afin d’augmenter le revenu moyen dans un environnement de forte demande. Cet article présente un modèle de revenu intégré aux théories de la file d’attente et de la demande de prix afin de résoudre le problème de conception et de tarification des entrepôts de stockage publics. Nous considérons deux cas de demande dans le modèle, à savoir une demande exponentielle et une demande linéaire par morceaux.Nous développons également une solution basée sur des techniques de programmation dynamiques pour résoudre le problème. En utilisant les données d’un entrepôt, nous menons des expériences numériques. Les résultats montrent que notre approche peut améliorer les revenus attendus des entrepôts publics à forte demande de 16,6 % en moyenne. Nous réalisons en outre une analyse de sensibilité du prix et étudions la relation entre le revenu et le prix.This thesis studies optimal models for the flexibility of supply chain policies and capacities with uncertain demand. This thesis investigates three optimization problems: An order policy design in the quantity-flexibility contract and the capacity design in robotic warehouses and self-storage warehouses.We first consider the two-echelon supply chain between the automobile manufacturer and the retailer, where the retailer purchases green automobiles from the automobile manufacturer and receives the green sensitive customer demand.We make an order policy in a quantity-flexibility contract that considers green sensitive demands. The policy considers that the automobile manufacturer determines the greening level and the retailer determines the retail price before establishing the contract. We build the models to describe this contract in both decentralized and centralized decision-making supply chains. We apply Stackelberg game to optimize the greening level for maximizing the automobile manufacturer's profit and optimize the retail price with green sensitive demand for maximizing the retailer's profit. We further consider the equilibrium decision between the greening level and the retail price for maximizing the profit of the supply chain.We then study capacities of robots and pickers in a Robotic Mobile Fulfillment System (RMFS), featured byseveral robots lifting and transporting movables storage shelves from storage grids to order pickers. We build high-dimension Markov models to describe this system with customer classes, calculate throughput of this system given the number of robots and provide design rules to determine the optimal number of robots and their capacities considering the trade-off between capacities of picker stations and robots. We verify the analytic results of Markov models with simulations. We further consider multiple-picker RMFS and study its optimal design. We consider another objective of designing capacities in RMFS. We build queue network models to describe the RMFS with two protocols in sharingrobots for pickers, propose the corresponding algorithms, conduct numerical analyses, and evaluate the performance of the RMFS by calculating throughput time. We then calculate the optimal number and velocity of robots and provide the effective design rules for RMFS.Finally, we study the self-storage warehouses. The design of self-storage warehouses needs to fit market segments to increase the average revenue in an environment of high demand. This thesis presents a revenue model integrated with queuing and price-demand theories to solve the design and pricing problem for self-storage warehouses. We consider two demand cases in the model, which are exponential demand and piecewise linear demand. We also develop a solution based on dynamic programming techniques to solve the problem. Using data from a warehouse, we conduct numerical experiments. Results show that our approach can improve the expected revenue of public storage warehouses with high demand by 16.6% on average. We further conduct a sensitivity analysis on price and investigate the relationship between revenue and price
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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