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Arbulu I.,University of the Pacific of Peru | Lozano J.,University of the Balearic Islands | Rey-Maquieira J.,University of the Balearic Islands
Renewable and Sustainable Energy Reviews | Year: 2017

The use of municipal solid waste (MSW) for energy generation is an important paradigm shift in municipal solid waste management (MSWM). The concept of waste-to-energy (WTE) is consistent with the basic principles of waste hierarchy set by the European Commission in environmental agenda. WTE became an effective response in small-island which usually rely on tourism for economic development. Many WTE power plants have been developed through PPP arrangements; however, little attention has been paid in the academic literature to the impact of tourism to WTE utilities performance. This paper analyzes the influence of tourism to a waste-to-energy public-private partnership (WTE PPP) through the case study of Mallorca, an internationally renowned summer seaside destination. The analysis of Mallorca's experience shows that tourism strongly influences management costs of WTE facilities and PPP contracts still needs to adapt the tariff system to promote better performance of the public service. © 2017 Elsevier Ltd


Bravo E.R.,University of the Pacific of Peru
Pacific Asia Conference on Information Systems, PACIS 2015 - Proceedings | Year: 2015

Industrial psychology sets forth that human knowledge has an impact on performance. Literature on information systems proposes that usefulness of an information system also contributes to performance results. An economic approximation suggests that people and technology are substitutable factors to produce outputs. This study focuses on analysing the substitution effect between people (based on their knowledge) and technology (based on its usefulness) in different automation levels. We gathered data from 125 users. The results show that the higher the level of automation the lower the effect of knowledge on performance and higher the impact of usefulness on performance. The design of information systems can use this moderating effect to assign tasks (between individual and technology) based on convenience and timeliness, but the negative factors of a higher level of automation should be taken into consideration, such as impairment of the employee's knowledge.


Cornillier F.,University of the Pacific of Peru | Charles V.,Catholic University of Peru
Operations Research Letters | Year: 2015

Various journal-ranking algorithms have been proposed, most of them based on citation counts. This article introduces a new approach based on the reciprocal direct influence of all pairs of a list of journals. The proposed method is assessed against an opinion-based ranking published in 2005 for 25 operations research and management science (OR/MS) journals, and seven methods based on citation counts. The results show a strong correlation with the opinion-based ranking. © 2015 Elsevier B.V. All rights reserved.


Stucchi L.,University of the Pacific of Peru | Stucchi L.,Catholic University of Peru | Vasquez D.A.,Catholic University of Peru | Vasquez D.A.,Indiana University - Purdue University Fort Wayne
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2013

Fluid flow advecting one substance while others are immobilized can generate an instability in a homogeneous steady state of a reaction-diffusion- advection system. This differential-flow instability leads to the formation of steady spatial patterns in a moving reference frame. We study the effects of shear flow on this instability by considering two layers of fluid moving independently from each other, but allowing the substances to diffuse along and across the layers. We find that shear flow can generate instabilities even if the average flow velocity is zero for both substances. These instabilities are strongly dependent on which substance is advected by the shear flow. We explain these effects using the results of Taylor dispersion, where an effective diffusivity is enhanced by shear flow. © 2013 American Physical Society.


Aussel D.,University of Perpignan | Garcia Y.,University of the Pacific of Peru
SIAM Journal on Optimization | Year: 2014

One of the most famous single-valuedness results for set-valued maps is due to Kenderov [Fund. Math., LXXXVIII (1975), pp. 61-69] and states that a monotone set-valued operator is single-valued at any point where it is lower semicontinuous. This has been extended in Christensen and Kenderov [Math. Scand., 54 (1984), pp. 70-78] to monotone maps satisfying a so-called *-property. Our aim in this work is twofold: first, to prove that the *-property assumption can be weakened, and second, to emphasize that these classical single-valuedness results for monotone operators can be obtained, in very simple way, as direct consequences of counterpart results proved for quasi-monotone operators in terms of single-directionality. © 2014 Society for Industrial and Applied Mathematics.


Cardenas J.M.G.,University of the Pacific of Peru
28th International Conference on Computer Applications in Industry and Engineering, CAINE 2015 | Year: 2015

Steganography techniques hide information into different media in a way that is imperceptible to the human eye. Because of that there are opposite techniques, which try to uncover information that might be inside a file. The purpose of this paper is to analyze if a picture file that contains hidden data present changes in its multifractal characteristics. To test our claims we have applied image multifractal analysis to a set of pictures that contains different types of hidden data. We have discovered that a picture media manipulated by steganography techniques present changes in their original multifractal patterns, i.e. multifractal spectra and values of the generalized fractal dimension Dq. The analysis of these changes could possibly aid in the identification of a suspicious file.


Orellana E.R.B.,University of the Pacific of Peru
2015 Americas Conference on Information Systems, AMCIS 2015 | Year: 2015

The benefits of automation lead to increase levels of technology intervention. However, automation can have negative effects, such as reducing employee knowledge (deskilling). Other authors claim that automation may also raise knowledge (up-skilling). This study analyzes the effect of automation on an employee's knowledge to determine the presence of deskilling - if the knowledge of the task decreases-, up-skilling - if the knowledge of information system increases- or reskilling (a simultaneous effect of decreasing the knowledge of the task and increasing the knowledge of the information system). By using a survey, we gathered data from 125 users and used partial least squares for the analysis. The results show that if the automation levels vary, presence of reskilling is evident in an individual. The design of information systems should take into consideration automation will finally result in reskilling, simultaneously impairing knowledge of the task but increasing knowledge of the information system.


Defilippi E.,University of the Pacific of Peru
Maritime Policy and Management | Year: 2012

Lead poisoning of Callao's population is the most severe externality port operations cause in Peru. The problem could have been tackled in 2009, after the government issued a decree regulating how mineral ore was to be handled at Peruvian ports. However, the port regulator's inability to follow the criteria contained in their own regulations led the procedure of selecting the providers of the service to continuous delays, and finally, to a complete stop. As a consequence, Callao's population will continue to be affected by this externality until 2013. The problem the regulator could not solve was to determine whether the market for "mineral ore stevedore services" at Callao Port was monopolistic or competitive. This article re-examines the case and concludes that the market for the service has natural monopoly characteristics. Therefore, the regulator should have ordered the call of an auction to select the least expensive provider and thus spare the population from four more years of lead poisoning. © 2012 Copyright Taylor and Francis Group, LLC.


Arbulu I.,University of the Pacific of Peru | Lozano J.,University of the Balearic Islands | Rey-Maquieira J.,University of the Balearic Islands
Waste Management | Year: 2016

This article analyzes the influence of tourism on the municipal solid waste management (MSWM) system taking as reference the case study of Mallorca, an internationally renowned destination. The characteristics of tourism such as seasonality and land scarcity, set interesting challenges to public-private partnerships related to MSWM system. The analysis of Mallorca's experience shows that land endowment strongly influences the choice of treatment technologies in tourism destinations. Furthermore, tourism seasonality significantly affects management costs which should be considered on PPP contracts. Finally, the tariff system in this kind of environmental PPPs in tourist destinations still need to improve to promote waste minimization and recycling. © 2016 Elsevier Ltd.


Perez L.M.,University of the Pacific of Peru
Journal of Men's Health | Year: 2013

Academic literature devoted to population health in Peru is primarily focused on maternal and child health indicators and outcomes. By comparison, little is known about the health of Peruvian men, in particular, and the implications of the same for their well-being or for community health in general. This perspective article examines mental illness and substance dependency as experienced by Peruvian men but overlooked as related factors in their overall health, and not considered in relation to the health outcomes of women, children, and communities. It is argued that in developing analyses about population health, it is insufficient to focus narrowly on maternal and child health as indicators of well-being and development, and that it is worthwhile to consider a research agenda that incorporates the health of men-particularly those vulnerable because of socioeconomic conditions-into the broader equation. © Mary Ann Liebert, Inc.

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