1,720,956 research outputs found
Dynamical phase diagrams of a love capacity constrained prey–predator model
Get PDFOne interesting question in love relationships is: finally, what and when is the end of this love relationship? Using a prey–predator Verhulst–Lotka–Volterra (VLV) model we imply cooperation and competition tendency between people in order to describe a “love dilemma game”. We select the most simple but immediately most complex case for studying the set of nonlinear differential equations, i.e. that implying three persons, being at the same time prey and predator. We describe four different scenarios in such a love game containing either a one-way love or a love triangle. Our results show that it is hard to love more than one person simultaneously. Moreover, to love several people simultaneously is an unstable state. We find some condition in which persons tend to have a friendly relationship and love someone in spite of their antagonistic interaction. We demonstrate the dynamics by displaying flow diagrams.Fil: Simin, P. Toranj. Shahid Beheshti University; IránFil: Jafari, Gholam Reza. Shahid Beheshti University; Irán. Közép-európai Egyetem; HungríaFil: Ausloos, Marcel. University of Leicester; Reino Unido. Group Of Researchers For Applications Of Physics In Economy And Sociology; BélgicaFil: Caiafa, César Federico. Indiana University; Estados Unidos. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Caram, Leonidas Facundo. Universidad de Buenos Aires. Facultad de Ingeniería; ArgentinaFil: Sonubi, Adeyemi. Università degli Studi di Milano; ItaliaFil: Arcagni, Alberto. Università degli Studi di Milano; ItaliaFil: Stefani, Silvana. Università degli Studi di Milano; Itali
Effects of competition and cooperation interaction between agents on networks in the presence of a market capacity
Get PDFA network effect is introduced taking into account competition, cooperation, and mixed-type interaction among agents along a generalized Verhulst-Lotka-Volterra model. It is also argued that the presence of a market capacity undoubtedly enforces a definite limit on the agent's size growth. The state stability of triadic agents, i.e., the most basic network plaquette, is investigated analytically for possible scenarios, through a fixed-point analysis. It is discovered that: (i) market demand is only satisfied for full competition when one agent monopolizes the market; (ii) growth of agent size is encouraged in full cooperation; (iii) collaboration among agents to compete against one single agent may result in the disappearance of this single agent out of the market; and (iv) cooperating with two rivals may become a growth strategy for an intelligent agent
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Managing adverse temperature conditions through hybrid financial instruments
No full textRecent international policy initiatives focus on reducing carbon emissions to limit warming. It is almost universally recognized that risks connected to climatic changes are unpredictable in their consequences. Moreover, attempts (for instance the 2016 Paris conference) to manage climatic changes at a global level have been counterbalanced by a not clear-cut US policy. Surprisingly, the financial world does not seem to care much about this problem. Yet, it is estimated that 80% of world industries (i.e. agriculture, construction sector and hospitality activities) are affected (totally or in part) by climate. Rain or low temperatures disrupt tourism; heavy rain or high temperatures devastate crops and damage farmers.
This work contributes to existing literature by proposing a temperature-based risk management using hybrid financial instruments based on weather derivatives. Based on well-established literature we firstly model temperature time series; we then price one-month forward option contracts for hedging adverse outcomes. Our results exploit daily temperature data-set (1951-2016) collected in Arezzo, Italy. We then show how a "negative" weather performance can be counterbalanced by the "positive" performance of the hedging Over-The-Counter financial instrument that can be tailored to meet specific needs.Recent international policy initiatives focus on reducing carbon emissions to limit warming. It is almost universally recognized that risks connected to climatic changes are unpredictable in their consequences. Moreover, attempts (for instance, the 2016 Paris conference) to manage climatic changes at a global level have been counterbalanced by ambiguous US policy. Surprisingly, the financial world does not seem to care much about this problem. Yet, it is estimated that 80% of world industries (ie, agriculture, construction sector and hospitality activities) are affected (totally or in part) by climate. Rain or low temperatures disrupt tourism; heavy rain or high temperatures devastate crops and damage farmers. This work contributes to existing literature by proposing temperature-based risk management using hybrid financial instruments built on weather derivatives. Based on well-established literature, we first model temperature time series; we then price one-month forward option contracts for hedging adverse outcomes. Our results exploit the daily temperature data set (19512016) collected in Arezzo, Italy. We then show how a "negative" weather performance can be counterbalanced by the "positive" performance of a hedging over-the-counter financial instrument, which can be tailored to meet specific needs
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
- …
