Search results for " war"
showing 10 items of 1535 documents
Macroscopic Dynamic Effects of Migrations in Patchy Predator-prey Systems
1997
Abstract Different mechanisms at the behaviourial or physiological levels determine many properties of predator-prey systems at the population level. In this paper, we present a method of obtaining complex predator-prey dynamic models from models at a detailed, behaviourial level of description. We consider a multi-patch predator-prey model, the dynamics of which contains two time-scales: a fast one, associated with migrations between patches, and a slow one, on which interactions, reproduction and mortality occur. We use methods of perturbation theory in order to aggregate the multi-patch system into a reduced system of two differential equations for the total prey and predator populations…
Uniform measure density condition and game regularity for tug-of-war games
2018
We show that a uniform measure density condition implies game regularity for all 2 < p < ∞ in a stochastic game called “tug-of-war with noise”. The proof utilizes suitable choices of strategies combined with estimates for the associated stopping times and density estimates for the sum of independent and identically distributed random vectors. peerReviewed
Weighting Elementary Prices in Consumer Price Index Construction Using Spatial Autocorrelation
2013
The Consumer Price Indexes (CPI) are used in current economic systems to measure inflation. When constructing CPIs, however, official institutions have systematically overlooked the spatial dimension of elementary prices. Ignoring the fact that prices are collected at geographical locations implicitly implies considering prices as spatially independent, when in fact they are not. To solve this problem, this article proposes to weight basic price data by taking into account the spatial correlation they display. The weighted geometric and arithmetic means suggested generalize and improve the simple geometric and arithmetic means currently in use.
Generalized Symmetry Models for Hypercubic Concordance Tables
2000
Summary Frequency data obtained classifying a sample of 'units' by the same categorical variable repeatedly over 'components', can be arranged in a hypercubic concordance table (h.c.t.). This kind of data naturally arises in a number of different areas such as longitudinal studies, studies using matched and clustered data, item-response analysis, agreement analysis. In spite of the substantial diversity of the mechanisms that can generate them, data arranged in a h.c.t. can all be analyzed via models of symmetry and quasi-symmetry, which exploit the special structure of the h.c.t. The paper extends the definition of such models to any dimension, introducing the class of generalized symmetry…
Multiple factor analysis: principal component analysis for multitable and multiblock data sets
2013
Multiple factor analysis MFA, also called multiple factorial analysis is an extension of principal component analysis PCA tailored to handle multiple data tables that measure sets of variables coll...
Iterative Cluster Analysis of Protein Interaction Data
2004
Abstract Motivation: Generation of fast tools of hierarchical clustering to be applied when distances among elements of a set are constrained, causing frequent distance ties, as happens in protein interaction data. Results: We present in this work the program UVCLUSTER, that iteratively explores distance datasets using hierarchical clustering. Once the user selects a group of proteins, UVCLUSTER converts the set of primary distances among them (i.e. the minimum number of steps, or interactions, required to connect two proteins) into secondary distances that measure the strength of the connection between each pair of proteins when the interactions for all the proteins in the group are consid…
W cieniu trudnej przeszłości — kolejna odsłona kryzysu katalońskiego
2021
The purpose of this article is to present the repression that hit Catalonia during the Spanish Civil War (abolition of autonomy and return to centralism, criminal sentences of a political nature), thus showing that prudent political choices, dialogue, and mediation in Catalonia are a matter of utmost importance. Historical experiences should not become an element of political games but motivate a debate between the central government and the autonomous region on reforming the state system and improving cooperation mechanisms. For Catalonia, the dictatorship meant cancelling all republican legislation and judicial decisions and the annulment as well as annulling the Catalan autonomy statute …
Children born of War and Social Trust - Analyzing Consequences of Rejection
2017
AbstractThis article examines the question whether rejection experiences negatively relate to the social trust of Children Born of War (CBOW) and if this connection is mediated by sense of self-worth. CBOW is a group of people born out of relations during war- and post-war times, involving one parent being a foreign soldier, a para-military officer, rebel or other person directly participating in the hostilities, while the other parent is a member of the native population. Also children born to child soldiers and children fathered by members of a peacekeeping troop are included within this group. These children, due to their biological background, often grow up in a surrounding in which the…
Against Metaphysical Structuralism
2020
Abstract Inductive Metaphysics (IM) combines an anti-aprioristic emphasis on an empirical and scientific basis for metaphysics with an insistence on a specifically philosophical abductive theory-building. Since the latter specifically philosophical work is not empirical itself, it may in a liberal sense be called apriori. This paper highlights this apriori dimension within IM by a case study on Structuralism, the view that fundamental reality consists of a network of relations (and properties), which a number of philosophers consider to be suggested by modern physics. Focussing on Dasgupta’s algebraic Generalism, the author argues that Structuralism suffers from a severe entailment problem,…
On Metadata Support for Integrating Evolving Heterogeneous Data Sources
2019
With the emergence of big data technologies, the problem of structure evolution of integrated heterogeneous data sources has become extremely topical due to dynamic and diverse nature of big data. To solve the big data evolution problem, we propose an architecture that allows to store and process structured and unstructured data at different levels of detail, analyze them using OLAP capabilities and semi-automatically manage changes in requirements and data expansion. In this paper, we concentrate on the metadata essential for the operation of the proposed architecture. We propose a metadata model to describe schemata and supplementary properties of data sets extracted from sources and tran…