Efficient Dynamic Floor Field Methods for Microscopic Pedestrian Crowd Simulations

2014 ◽  
Vol 16 (1) ◽  
pp. 264-286 ◽  
Author(s):  
Dirk Hartmann ◽  
Peter Hasel
Keyword(s):  
Computational Approach ◽  
The Other ◽  
Field Methods ◽  
Popular Medium ◽  
Crowd Simulations ◽  
On Line ◽  
Floor Field ◽  
Spatio Temporal ◽  
The One ◽  
Pedestrian Crowd

AbstractFloor field methods are one of the most popular medium-scale navigation concepts in microscopic pedestrian simulators. Recently introduced dynamic floor field methods have significantly increased the realism of such simulations, i.e. agreement of spatio-temporal patterns of pedestrian densities in simulations with real world observations. These methods update floor fields continuously taking other pedestrians into account. This implies that computational times are mainly determined by the calculation of floor fields. In this work, we propose a new computational approach for the construction of dynamic floor fields. The approach is based on the one hand on adaptive grid concepts and on the other hand on a directed calculation of floor fields, i.e. the calculation is restricted to the domain of interest. Combining both techniques the computational complexity can be reduced by a factor of 10 as demonstrated by several realistic scenarios. Thus on-line simulations, a requirement of many applications, are possible for moderate realistic scenarios.

scholarly journals Age of the Post-rift Sequence I from the Araripe Basin, Lower Cretaceous, NE Brazil: implications for spatio-temporal correlation

2021 ◽  
Vol 24 (1) ◽  
pp. 37-46
Author(s):  
João Carlos Coimbra ◽  
Tiago Menezes Freire
Keyword(s):  
Critical Review ◽  
Lower Cretaceous ◽  
Temporal Correlation ◽  
Isotopic Analysis ◽  
The Other ◽  
Stratigraphic Framework ◽  
Spatio Temporal ◽  
Radiometric Ages ◽  
The One ◽  
Do So

A robust biostratigraphic zonation based on microfossils supports the stratigraphic framework and correlation of the interior basins of the Lower Cretaceous of NE Brazil. This zonation has also allowed correlations with coeval sections in the Brazilian marginal basins and in the Gabon and Congo basins (central-west Africa). These records, consisting mainly of non-marine sediments, were a great challenge with regard to the correlation with the International Chronostratigraphic Chart. Therefore, local stages were used, the most recent being the Alagoas local Brazilian Stage, with which the Post-rift Sequence I of the Araripe Basin is related. Regarding lithostratigraphy, this sequence includes the Rio da Batateira (Barbalha for some authors) and Santana formations, the last one with the famous Crato, Ipubi, and Romualdo members, from the base to the top. Although currently there is a consensus on the age of the Alagoas local Brazilian Stage in the Araripe Basin, recently a new age for at least part of the Post-rift Sequence I was proposed. This new proposal, based on isotopic analysis of Re-Os, arose as a panacea to correlate the Rio da Batateira Formation and the Crato and Ipubi members with the international stages. Surprisingly, their authors, although on the one hand, they seem to underestimate biostratigraphic results, on the other they seek to support their proposal from microfossils studied by previous authors, but they do so in an inappropriate way, leading readers to misinterpret their results. Therefore, this paper presents a critical review on the age of the Alagoas local Brazilian Stage in the Araripe Basin and nearby basins, refuting a Barremian age for part of the Post-rift Sequence I. Keywords: Alagoas local Brazilian Stage, biostratigraphy, ostracods, palynomorphs, radiometric ages.

Closing Ontologies to Define OLAP Systems

2014 ◽  
Vol 4 (4) ◽  
pp. 1-16
Author(s):  
Manuel Torres ◽  
José Samos ◽  
Eladio Garví
Keyword(s):  
Domain Ontology ◽  
The Other ◽  
Other Hand ◽  
On Line ◽  
Analytical Processing ◽  
On Line Analytical Processing ◽  
Basic Approaches ◽  
The One

Ontologies can be used in the construction of OLAP (On-Line Analytical Processing) systems. In such a context, ontologies are mainly used either to enrich cube dimensions or to define ontology based-dimensions. On the one hand, if dimensions are enriched using large ontologies, like WordNet, details that are beyond the scope of the dimension may be added to it. Even, dimensions may be obscured because of the massive incorporation of related attributes. On the other hand, if ontologies are used to define a dimension, it is possible that a simplified version of the ontology is needed to define the dimension, especially when the used ontology is too complex for the dimension that is being defined. These problems may be solved using one of the existing mechanisms to define ontology views. Therefore, concepts that are not needed for the domain ontology are kept out of the view. However, this view must be closed so that, no ontology component has references to components that are not included in the view. In this work, two basic approaches are proposed: enlargement and reduction closure.

A Multidimensional Methodology with Support for Spatio-Temporal Multigranularity in the Conceptual and Logical Phases

2011 ◽  
pp. 194-230 ◽  
Author(s):  
Concepción M. Gascueña ◽  
Rafael Guadalupe
Keyword(s):  
Spatial Data ◽  
Hierarchical Structures ◽  
The Other ◽  
Fe Model ◽  
Multidimensional Databases ◽  
Object Relational ◽  
Spatio Temporal ◽  
The One ◽  
Spatial Semantics ◽  
Thematic Data

The Multidimensional Databases (MDB) are used in the Decision Support Systems (DSS) and in Geographic Information Systems (GIS); the latter locates spatial data on the Earth’s surface and studies its evolution through time. This work presents part of a methodology to design MDB, where it considers the Conceptual and Logical phases, and with related support for multiple spatio-temporal granularities. This will allow us to have multiple representations of the same spatial data, interacting with other, spatial and thematic data. In the Conceptual phase, the conceptual multidimensional model—FactEntity (FE)—is used. In the Logical phase, the rules of transformations are defined, from the FE model, to the Relational and Object Relational logical models, maintaining multidimensional semantics, and under the perspective of multiple spatial, temporal, and thematic granularities. The FE model shows constructors and hierarchical structures to deal with the multidimensional semantics on the one hand, carrying out a study on how to structure “a fact and its associated dimensions.” Thus making up the Basic factEnty, and in addition, showing rules to generate all the possible Virtual factEntities. On the other hand, with the spatial semantics, highlighting the Semantic and Geometric spatial granularities.

Navigational Paths and Didactical Patterns

2011 ◽  
pp. 170-179 ◽  
Author(s):  
Stefan Iske
Keyword(s):  
Learning Processes ◽  
The Other ◽  
Homogeneous Groups ◽  
E Learning ◽  
On Line ◽  
The One ◽  
Teaching Learning ◽  
On Line Learning ◽  
The Relationship ◽  
Deductive Theory

This chapter focuses on a specific field of e-learning: the relationship between general didactical patterns to design teaching/learning processes on the one hand and empirical behavioral patterns of users (navigational paths) on the other hand. It is based on empirical research on the usage of a hypertextual on-line learning environment. The analyzed dataset consists of about 1500 paths containing about 4700 pages. These empirical navigational paths are analyzed in order to identify similar paths (patterns, structures and regularities), following a heuristic and inductive approach. This approach is based on the method of sequence analysis (optimal matching). The aggregation of similar paths into homogeneous groups will be discussed, as well as the identification of patterns within these aggregated groups. The inductively identified empirical patterns will be compared to deductive, theory-driven patterns. Empirical results will be presented which show the variety and complexity of empirical navigational paths and their relation to theory-driven patterns. These results will be located and discussed in a pedagogical-didactical context.

scholarly journals On-line quizzes to evaluate comprehension and integration skills

2016 ◽  
Vol 6 (2) ◽  
pp. 75 ◽  
Author(s):  
José David Badia Valiente ◽  
Françoise Olmo Cazevieille ◽  
José Manuel Navarro Jover
Keyword(s):  
Active Participation ◽  
The Other ◽  
Level Of Satisfaction ◽  
On Line ◽  
The Cross ◽  
The One ◽  
High Level

This work demonstrates the use of a 2.0 tool, namely, Socrative, to evaluate one of the cross-curricular competences indicated by the Universitat Politècnica de València, specifically, comprehension and integration. It has been applied to the courses in different areas: sciences, engineering and languages.As part of its implementation, activities were proposed that could be done at the beginning, during or at the end of the class to, on the one hand, help students acquire the knowledge associated with the course(s), and on the other, gather evidence that demonstrates acquisition of said competence.The results show a high level of satisfaction by the students with the use of the Socrative tool as an element to promote active participation and the acquisition of the cross-curricular competence of comprehension and integration; therefore, its extension to other courses has been suggested.

scholarly journals Lockdown e “Chiesa in uscita”. Un caso di studio in Italia: la fraternità “AGBP”

2021 ◽  
Vol 6 (13) ◽  
pp. 131-142
Author(s):  
Daniela Turco
Keyword(s):  
Catholic Church ◽  
Essential Role ◽  
Social Bonds ◽  
The Other ◽  
Focus Attention ◽  
Daily Lives ◽  
On Line ◽  
The Many ◽  
The One

The impetuosity of the Sars-Covid 2 infection has been remarkable, quickly upsetting the habits of individuals in every seat of the planet. We can observe, on the one hand, the individuals, lost and called to redefine every area of their daily lives. On the other, the institutions that, seizing this loss, have been called to play their essential role of creating and strengthening social bonds. The Catholic Church has promoted respect for the norms, without renouncing a “religious offer” which seems to have responded to an effective demand for accompaniment with a lot of possibility to chose on line liturgical celebrations, with a multiplicity of forms and possibilities of access. Among the various options possible, it was decided to focus attention on a specific case: the case of the fraternity “Amici di Gesù Buon Pastore” (AGBP), which has experienced a significant increase in its followers in the days of lockdown. In particular, we will ask ourselves what so many spiritual-followers have been looking for and if (and how) this interest, born during the quarantine period, can transform the new forms of religious belonging into a context where the historical religions seem to be unattractive if compared to the many alternatives of spirituality present on the “market”.

scholarly journals The Ascension of Christ and Permanent Ecclesiogenesis: A Contribution to Pneumatological and Eschatological Ecclesiology

2021 ◽  
Vol 91 (3) ◽  
pp. 75-94
Author(s):  
Andrzej Napiórkowski
Keyword(s):  
New Testament ◽  
Holy Spirit ◽  
The Other ◽  
Holy Trinity ◽  
The Holy Spirit ◽  
History Of ◽  
Spatio Temporal ◽  
Temporal Reality ◽  
The One ◽  
The Church

What is the Ascension? Is it merely a narrative of a post-paschal community? In what spatio-temporal reality has it been fulfilled? How should we understand its placement in time: forty days after the Resurrection, and ten days prior to the Descent of the Holy Spirit? The Ascension should be analyzed integrally in connection with the mystery of death and the Resurrection. This paper presents an attempt at deepening New-Testament ecclesiogenesis while also moving away from the narrowed understanding that the Church emerged solely as a result of the words, deeds and person of Jesus Christ. On the one hand, it is a reference to the five stages of the Church's emergence as an event of the entire Holy Trinity in the still-unfinished history of salvation. On the other: it is a presentation of the typically ignored of the Ascension, which is usually reduced to the event of the Resurrection of the glorious Lord. Analysis of the Ascension – performed in the light of ecclesiogenesis – leads to uncovering the pneumatological and eschatological components, which are most interesting in reference to the multi-dimensional establishment of the Church and its mission.

scholarly journals EDUCAÇÃO PROFISSIONAL: “o trabalho dignifica o homem?”

Revista Labor ◽  
2018 ◽  
Vol 2 (18) ◽  
pp. 236
Author(s):  
Juliana de Almeida Pereira e Santos
Keyword(s):  
Oral History ◽  
Integrated Curriculum ◽  
Qualitative Approach ◽  
The Other ◽  
Temporal Context ◽  
Integrative Education ◽  
Philosophical Foundations ◽  
Spatio Temporal ◽  
The One

Este artigo, excerto de um estudo maior de dissertação de Mestrado, propõe um paralelo entre os fundamentos epistemológicos e filosóficos que originam e sustentam a concepção de currículo integrado, como teoria pedagógica de base marxista, de um lado, e, de outro, os parâmetros organizacionais e pedagógicos que emergem da experiência de um curso Técnico em Enfermagem analisado, buscando apontamentos no que concerne a rupturas e a continuidades concernentes à educação omnilateral. Utilizou-se, para tanto, pesquisa de natureza básica, do tipo exploratória, com abordagem hipotético-dedutiva e enfoque qualitativo. No que tange ao procedimento, estudo de caso, a partir da técnica de história oral, na modalidade temática. As conclusões apontam que o caso analisado, embora não tenha atingido plenamente o desafio de educação integradora, dadas as disputas e os arranjos organizacionais em contrário, por apresentar ações e intenções integradoras, ainda que embrionárias e inconclusas, constituiu-se como proposta inabitual, em seu contexto espaçotemporal, o que evidencia seu mérito e relevância.AbstractThis article, an excerpt from a larger dissertation study, proposes a parallel between the epistemological and philosophical foundations that originate and sustain the conception of integrated curriculum, as pedagogical theory of Marxist base, on the one hand, and, on the other hand, the organizational and pedagogical parameters that emerge from the experience of a Technical Course in Nursing analyzed, looking for notes on the ruptures and continuities concerning omnilateral education. For this purpose, research of a basic nature, of the exploratory type, with hypothetical-deductive approach and qualitative approach was used. Regarding the procedure, a case study, based on the oral history technique, in the thematic modality. The conclusions pointed out that the case analyzed, although it did not fully reach the challenge of integrative education, given the disputes and the organizational arrangements to the contrary, for presenting actions and intentions integrating, although embryonic and inconclusive, was an unusual proposal, in its spatio-temporal context, which shows its merit and relevance.

scholarly journals DOCUMENTARY AND ARTISTIC CHRONOTOPE IN THE NOVEL BY I. S. NIKITIN «THE DIARY OF THE SEMINARIAN»

2020 ◽  
Vol 23 (4) ◽  
pp. 8-15
Author(s):  
Nataliya V. Volodina ◽  
◽  
Nikolai A. Degtyarev ◽  
Keyword(s):  
Temporal Organization ◽  
The Other ◽  
The Novel ◽  
Value System ◽  
Other Hand ◽  
Event Series ◽  
Spatio Temporal ◽  
Characteristic Features ◽  
The Aesthetic ◽  
The One

The story «Diary of a seminarian», by I. S. Nikitin, as the name implies, is written in the form of a diary: Nikitin imitates the real diary of a young seminarian. The article makes an assumption about the interaction of two discourses, artistic and documentary, in the text of the story. This interaction manifests itself in relation to the spatio-temporal organization of the world of the work. The narrator's time is subordinated to the documentary discourse, which basically does not coincide with the physical time, but is built in accordance with the psychological characteristics of the main character, the author of the diary. On the other hand, the completeness of the temporary whole of the story, the distribution of time in accordance with the aesthetic tasks solved in the work, signals the influence of artistic discourse. The deployment of an event series is also subordinated to the task of interaction between two types of chronotope. On the one hand, the «mosaic» of this series, the set of events included in the text as if not mandatory, create the illusion of authenticity of what is happening; on the other, all these various inclusions are somehow artistically justified and perform certain aesthetic functions. The unfolding of events «here and now», the abundance of dialogues, direct speech of the characters are characteristic features of the artistic chronotope of Nikitin's story. The optics of perception and the language of describing space in the story are constructed in accordance with the value system of the narrator, manifesting itself in the documentary style of the narrative. On the other hand, the detailed description of the spaces familiar to the narrator serves an artistic function: it creates an image of the Seminary. As a result of the analysis, the author comes to the conclusion that the features of the documentary diary chronotope are associated with the image of the narrator, and the artistic diary chronotope – with the image of the author.

scholarly journals E-Business Performance Analysis: A Case Of A Slovenian e-Shop

2011 ◽  
Vol 2 (10) ◽  
Author(s):  
Metka Tekavcic ◽  
Mojca Marc
Keyword(s):  
Performance Analysis ◽  
Empirical Analysis ◽  
Business Performance ◽  
Business Environment ◽  
The Other ◽  
On Line ◽  
The One ◽  
A Company

This paper is part of our on-going work in the field of business performance analysis in e-environment. We put forward a framework that tries to link different aspects of performance analysis and to relate them to broader business environment on the one hand, and to the value of a company on the other. We illustrate the use of the proposed framework with a case study examining the Slovenian home-store company Merkur, which operates one of the best Slovenian on-line shops. The framework can also serve as a tool for an empirical analysis.

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