Optimal alarm systems for FIAPARCH processes

In this work, an optimal alarm system is developed to predict whether a financial time series modeled via Fractionally Integrated Asymmetric Power ARCH (FIAPARCH) models, up/downcrosses some particular level and give an alarm whenever this crossing is predicted. The paper presents classical and Bayesian methodology for producing optimal alarm systems. Both methodologies are illustrated and their performance compared through a simulation study. The work finishes with an empirical application to a set of data concerning daily returns of the Sao Paulo Stock Market

Utilité des informations et agents cognitifs

International audienceThis paper focuses on modelling information usefulness. More precisely, it aims at characterizing how useful a piece of information is for a cognitive agent which has some beliefs and goals. The paper presents three different approaches. We take Information Retrieval as a particular applicative domain and we compare some existing measures with the usefulness measure introduced here.Dans cet article, nous nous intéressons à la modélisation de l'utilité des informations. Plus précisément, nous visons à caractériser ce qu'est, pour un agent cognitif qui a des croyances et des buts, une information utile ou à quel de-gré une information lui est utile. Nous présentons trois mo-dèles différents et nous prenons la Recherche d'Informa-tion comme domaine applicatif en comparant les mesures existantes avec une mesure d'utilité définie ici

The influence of culture in international leadership

The numerous amount of studies that have been done through the years within the field of culture and, specifically organizational culture, says a lot regarding the important of the matter in organizations. Nowadays, it seems more and more important to demystify the concept of culture, so that organizations and its leaders, especially those operating worldwide, may take the most advantage possible from it, in order to have satisfied employees, satisfied managers and satisfied investors. The objective of this article is to help understanding, from theory to practice, what is culture is for an international organization, the importance of knowledge management and, lastly, the role of the leader as influencer of culture and transmitter of culture top-to-bottom.info:eu-repo/semantics/acceptedVersio

Innovativeness, innovation behavior and performance in the Portuguese hotel industry

This work investigates hotel innovation activity based on 11 hotel-specific innovation dimensions and antecedents. Results from a sample of 326 Portuguese hotels showed a high level of Innovativeness in the Portuguese hospitality industry. Information and Communication Technology, and Marketing were the leading innovation areas. The moderate level of Innovation Behavior demonstrates the dominance of incremental innovations. Hotel Size, Hotel Stars, Hotel Chain, and Personnel Training are significantly related to Innovation Behavior. Hotel Innovativeness positively impacted hotel Innovation Behavior, and hotel Innovation Behavior positively impacted hotel Performance. These findings provide both scholars and practitioners with relevant insights into hotel innovation in Portugal.info:eu-repo/semantics/publishedVersio

Management of estuarine beaches on the Amazon coast though the application of recreational carrying capacity indices

The purpose of this paper is to determine the Recreational Carrying Capacity of three estuarine beaches (Colares, Marudá and Murubira) on the Amazon coast of Brazil, based on the combined assessment of natural conditions and visitor facilities. In the final analysis, the carrying capacity of Colares beach was estimated to be 1089 visitors per day, and that of Murubira beach, 238 visitors per day. At Marudá beach, however, the inadequate quality of the water resulted in an RCC of zero, indicating that the beach should not be visited for recreational use. The results of this study may provide a valuable diagnostic tool for the development of future state and municipal coastal management programs. We believe that the procedures adopted in this study are applicable to other estuarine beaches on the Amazon coast, as well as in other estuarine beaches elsewhere with similar natural characteristics.Peer ReviewedPostprint (author's final draft

Levantamento da incidência do amarelinho ou CVC nos pomares de citros no Estado do Amazonas.

Levantamento da doenca amarelinha causada pela bacteria Xylella fastidiosa nos pomares de citros no Estado do Amazonas (Brasil).bitstream/item/83143/1/Pesquisa-99-1999.pd

Controle químico da Sigatoka negra da bananeira. I - Trifloxistrobin, Propiconazole e Difenoconazole.

A Sigatoka negra, causada pelo fungo Mycosphaerella fijiensis (fase anamórfica: Paracercospora fijiensis (Morelet) Deighton, é a doença mais grave da bananeira, causando perdas de 100% da produção, quando não se efetua o controle. Os fungicidas trifloxistrobin, difenoconazole e propiconazole, foram eficientes no controle da Sigatoka negra, aplicados a intervalos regulares de 14 dias.bitstream/CPAA-2009-09/6808/1/ComTec-7.pd

Epidemiologia da sigatoka negra da bananeira (Musa spp).

Estudo sobre o progresso da sigatoka negra em bananeiras, associado a variacoes e/ou efeitos de variaveis climaticas, que permitem prever as epocas de maior severidade e/ou surtos da doenca, de forma a estabelecer estrategias de controle mais viaveis do ponto de vista economico-ambiental no Estado do Amazonas (Brasil).bitstream/item/76938/1/CPAA-PESQ.-AND.-34-99.pd

O acervo raro da biblioteca Milton de Albuquerque, da Embrapa Amazônia Oriental.

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