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Search Results: 1 - 10 of 144443 matches for " F. Pasi "
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A study of the 1 and 2 January 2010 sea-storm in the Ligurian Sea
F. Pasi, A. Orlandi, L. F. Onorato,S. Gallino
Advances in Science and Research (ASR) , 2011, DOI: 10.5194/asr-6-109-2011
Abstract: During the last days of 2009 and the first days of 2010, a wide and deep low pressure system over Western Europe generated a very extended and strong southerly pressure gradient on the whole Western Mediterranean Sea with a resulting very rough to high sea state. Over the Ligurian Sea (North Western Mediterranean) the resulting sea state was a combination of a very tuned (in both frequency and direction) swell coming from the south-west, with nearly oceanic peak wave period, and a broader north-westerly wind sea with shorter period. This kind of sea state, not extreme in terms of significant wave height, caused unusual widespread damages to Ligurian coastal structures. In this study, authors investigated the structure of such a combined sea state by analysing numerical weather prediction outputs coming from atmospheric and wave models and comparing them with data coming from ondametric buoys and meteorological stations located in the Ligurian Sea area. As a result, it was found that the forecasting model chain almost correctly predicted the wave height in a first phase, when the sea state was only due to the first south-westerly swell peak, while significantly underestimated the combined sea state, when also the second north-westerly wind sea developed and interacted with the first one. By analysing the structure of directional wave spectra forecasted by the operational wave model and measured by the buoys, authors have attempted to find out the reasons for model deficiencies in forecasting the time evolution of significant parameters characterising the sea state.
An observational and numerical case study of a flash sea storm over the Gulf of Genoa
A. Orlandi, F. Pasi, L. F. Onorato,S. Gallino
Advances in Science and Research (ASR) , 2008, DOI: 10.5194/asr-2-107-2008
Abstract: During the night between the 8 and 9 December 2006 the seawall of the Savona harbour (Liguria Region in north west of Italy) was overtopped by waves. In this work the "Savona flash sea storm" has been studied by analyzing the data recorded by meteo-marine observing stations and the data produced by high resolution meteo-marine numerical models. The data show that, due to the presence of a fast moving low pressure system, the event was characterized by a rapid transition and interaction between two different regimes of winds and related sea states. The results of the study suggest that the most damaging dynamics of the event could be correlated to a bi-modal structure of the wave spectrum. Based on this the authors suggest that a deeper study of the spectral structure of sea storms could lead to define new operational forecasting tools for the preventive evaluation of sea storms damaging potential.
Perspectives for Wearable Electronics in Healthcare and Childcare  [PDF]
Johanna Virkki, Pasi Raumonen
E-Health Telecommunication Systems and Networks (ETSN) , 2013, DOI: 10.4236/etsn.2013.23008
Abstract: This paper starts with a literature survey that introduces possibilities of wearable electronics (WE) in different healthcare and childcare applications. Next, 24 personal interviews and an Internet forum survey were conducted in Finland about the use of WE in applications mentioned above. According to the results, most of the people feel positive about clothes used for wireless identification purposes in healthcare and childcare, but when more information about the person is added that can be wirelessly read, the feelings become more negative. Several important points to consider before implementation of WE for healthcare and childcare environments were brought up.
Intercomparison of two meteorological limited area models for quantitative precipitation forecast verification
E. Oberto,M. Milelli,F. Pasi,B. Gozzini
Natural Hazards and Earth System Sciences (NHESS) & Discussions (NHESSD) , 2012, DOI: 10.5194/nhess-12-591-2012
Abstract: The demand for verification of numerical models is still very high, especially for what concerns the operational Quantitative Precipitation Forecast (QPF) used, among others, for evaluating the issuing of warnings to the population. In this study, a comparative verification of the QPF, predicted by two operational Limited Area Models (LAMs) for the Italian territory is presented: COSMO-I7 (developed in the framework of the COSMO Consortium) and WRF-NMM (developed at NOAA-NCEP). The observational dataset is the precipitation recorded by the high-resolution non-GTS rain gauges network of the National Civil Protection Department (NCPD) over two years (2007–2008). Observed and forecasted precipitation have been treated as areal quantity (areal average of the values accumulated in 6 and 24 h periods) over the 102 "warning areas", defined by the NCPD both for administrative and hydrological purposes. Statistics are presented through a series of conventional indices (BIAS, POD and POFD) and, in addition, the Extreme Dependency Score (EDS) and the Base Rate (BS or 1-BS) have been used for keeping into account the vanishing of the indices as the events become rare. Results for long-period verification (the whole 2 yr) with increasing thresholds, seasonal trend (3 months period), diurnal error cycle and error maps, are presented. Results indicate that WRF has a general tendency of QPF overestimation for low thresholds and underestimation for higher ones, while COSMO-I7 tends to overestimate for all thresholds. Both models show a seasonal trend, with a bigger overestimation during summer and spring, while during autumn and winter the models tend to be more accurate.
Fuzzy Similarity in Multicriteria Decision-Making Problem Applied to Supplier Evaluation and Selection in Supply Chain Management
Pasi Luukka
Advances in Artificial Intelligence , 2011, DOI: 10.1155/2011/353509
Abstract: It is proposed to use fuzzy similarity in fuzzy decision-making approach to deal with the supplier selection problem in supply chain system. According to the concept of fuzzy TOPSIS earlier methods use closeness coefficient which is defined to determine the ranking order of all suppliers by calculating the distances to both fuzzy positive-ideal solution (FPIS) and fuzzy negative-ideal solution (FNIS) simultaneously. In this paper we propose a new method by doing the ranking using similarity. New proposed method can do ranking with less computations than original fuzzy TOPSIS. We also propose three different cases for selection of FPIS and FNIS and compare closeness coefficient criteria and fuzzy similarity criteria. Numerical example is used to demonstrate the process. Results show that the proposed model is well suited for multiple criteria decision-making for supplier selection. In this paper we also show that the evaluation of the supplier using traditional fuzzy TOPSIS depends highly on FPIS and FNIS, and one needs to select suitable fuzzy ideal solution to get reasonable evaluation. 1. Introduction The overall objective of supplier selection process is to reduce purchase risk, maximize overall value to the purchaser, and build the closeness and long-term relationships between buyers and suppliers [1]. With the globalization of the economic markets and the development of information technology, many companies consider that a well-designed and implemented supply chain management (SCM) system is an important tool for increasing competitive advantage [2]. Previously, many methods have been proposed to solve the supplier selection problem, some of the popular ones being the linear weighting methods (LW) [3, 4], the analytic hierarchy process (AHP) [5, 6], the analytic network process [7], total cost approaches [8, 9], and mathematical programming (MP) techniques [10, 11]. However, several influence factors are often not taken into account in the decision-making process, such as incomplete information [12, 13], additional qualitative criteria, and imprecision preferences. A strategic approach towards supplier selection often involves multiple criteria [14] and several decision-makers [15, 16], and decision-making is often influenced by uncertainty in practice. Supplier selection may involve several and different types of criteria, combination of different decision models, group decision-making, and various forms of uncertainty. Technique for order performance by similarity to ideal solution (TOPSIS) [17], which is one of the known classical MCDM methods,
Chemical freeze-out temperature in hydrodynamical description of Au+Au collisions at sqrt(s_NN) = 200 GeV
Huovinen, Pasi
High Energy Physics - Phenomenology , 2007, DOI: 10.1140/epja/i2007-10611-3
Abstract: We study the effect of separate chemical and kinetic freeze-outs to the ideal hydrodynamical flow in Au+Au collisions at RHIC (sqrt(s_NN) = 200 GeV energy). Unlike in earlier studies we explore how these effects can be counteracted by changes in the initial state of the hydrodynamical evolution. We conclude that the reproduction of pion, proton and antiproton yields necessitates a chemical freeze-out temperature of T = 150 MeV instead of T = 160 - 170 MeV motivated by thermal models. Unlike previously reported, this lower temperature makes it possible to reproduce the p_T-spectra of hadrons if one assumes very small initial time, tau_0 = 0.2 fm/c. However, the p_T-differential elliptic flow, v_2(p_T) remains badly reproduced. This points to the need to include dissipative effects (viscosity) or some other refinement to the model.
Rahvausk lokaalses kollektiivis
Pasi Enges
M?etagused. Hüperajakiri , 2000,
Abstract: Among the large quantity of Saami materials filed in the Sound Archive of Folkloristics and Comparative Religion at the Turku University is included a collection of about 480 tapes from Talvadas (Dálvadas), a small River Saami village in northernmost Finland. The material was mainly produced during the years 1967-1975, when an in-depth research project was conducted in the village. All of the adult population of the village was repeatedly interviewed by altogether twelve interviewers. A wide range of Saami folklore was discussed during the interviews, but special weight was laid on topics concerning folk beliefs, memorates and belief legends. Some supernatural beings and forces, as well as the topographical distribution of the supernatural, are briefly described in this article as examples of the village's belief tradition. The Talvadas interviews form a thick corpus of material, which reveals the complex character of folk belief tradition on the local level. Variation occurs at least in each and every individual's fundamental attitudes towards the supernatural in general, attitudes towards certain supernatural beings and forces, and the means of narration and interpretation in different interview situations. Both the form and the function of narration vary in the different interviews of the same interviewee. The character of the interviewer (e.g. insider/outsider, age, sex) seems to be a crucial factor: the narrative and its evaluation are closely connected to the interview situation, and the result depends on who is talking with whom.The supernatural world is real to many of the villagers and strong belief may be expressed in the narratives, but the narrator's viewpoint can also be e.g. pedagogical or strictly humorous. Belief topics can also be used as a means of testing the listener's credulity, commenting on social relations, or displaying the narrator's creative skills in traditional storytelling. Thus the Talvadas-material breaks the ideal of a homogenous tradition community with commonly shared beliefs.
Teaching and Globalization
Pasi Sahlberg
Managing Global Transitions , 2004,
Abstract: Globalization is typically understood as an economic, political and cultural process that is reshaping the role of many nation-states in relation to global markets, agreements, and traditions. Recently it has become frequently analyzed in the context of education. However, there is surprisingly little work done on the pedagogical implications of globalization on teaching and learning other than shifting the emphasis from traditional subjects to information and communication technology and English as a foreign language. This article argues that globalization is having an e.ect on teaching and learning in three ways: educational development is often based on a global unified agenda, standardized teaching and learning are being used as vehicles to improvement of quality, and emphasis on competition is increasingly evident among individuals and schools. The article concludes that recent development of standardization and competition-based education will become increasingly counter-productive to preparing students for meaningful lives for and beyond knowledge economy. Furthermore, as a response to globalization, educators need to rethink the ways teaching and learning are organized in schools, promote appropriate flexibility at school level, creativity in classrooms and risk-taking among students and teachers as part of their daily work in school.
Subiendo el listón: como responde Finlandia al doble reto de la Educación secundaria?
Pasi Sahlberg
Abstract: La Educación Secundaria ha estado en el centro del desarrollo de las políticas sociales y el sistema educativo en Finlandia durante las últimas tres décadas. Después de crear, en los a os 70, una escuela comprensiva que dura nueve a os y es igual para todos los alumnos, los objetivos de la política educativa han sido siempre que todos los que dejan la escuela básica puedan tener acceso a la educación superior que elijan. Hoy en día, el sistema educativo finlandés está considerado como un estándar internacional de la buena calidad, junto con su condición de equidad y acceso a todo el sistema. En este artículo, analizo el doble reto -o sea, calidad de y acceso a la educación secundaria- a través de tres dimensiones: la tasa de transición de la Educación Secundaria Básica a la Educación Secundaria Superior, tasas de finalización de la Educación Secundaria y el aprendizaje de los alumnos. Luego, argumento que Finlandia ha sido capaz de crear un sistema de Educación Secundaria que funciona bien a un coste razonable, porque ha utilizado estrategias de reforma educativa basadas en (1) una visión a largo plazo de una buena Educación Secundaria para todos, (2) mejorar la calidad de la Educación Primaria para todos los ni os, (3) dise ar un sistema de intervención temprana y asesoramiento y consejo educativo en los centros educativos de Primaria y Secundaria, (4) ayudar a todos los alumnos a tener éxito en la transición de Primaria a Secundaria y crear caminos de segundas oportunidades para incrementar las tasas de éxito, y (5) promover la construcción de la capacidad lateral en la que las escuelas y los municipios aprenden unos de otros. La experiencia en Finlandia sugiere que mejorar la calidad de la Educación Secundaria requiere políticas sostenibles y liderazgo, cultivando profesionalidad y confianza en todo el sistema educativo, y acercamientos inteligentes al currículum y a la responsabilidad.
The wall paintings of the church of Al-Adra in the monastery of Deir-el-Baramus (Wadi-el-Natrun)
Pasi Silvia
Zograf , 2010, DOI: 10.2298/zog1034037p
Abstract: The fragmentarily preserved frescoes of the Church of Al-Adra in the monastery of Deir el-Baramus were fortunately discovered in 1986. They are located in the apse, on the southern wall of the altar area and along the walls of the nave. The condition of the frescoes makes it difficult to give a stylistic evaluation, and it is hard to determine the chronology of the frescoes because of the lack of literary sources and inscriptions. The style of the painting and the architectural data on the church lead one to dating all the preserved frescoes of Deir-el-Baramus to the same period. It probably involves the period after the repair of the central and lateral aisles, which probably took place after 1200. Apart from that, a comparison with other works from the same epoch indicates that the thirteenth century was most probably the time when the frescoes came into being.
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