1,720,955 research outputs found
Changes in the risk of river flooding due to urban development along plain rivers. Case study: the city of Gualeguaychú
No full textFil: Sato, Rodolfo Alejandro. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias Hídricas; Argentina.Muchas ciudades del Litoral argentino asentadas en la ribera de los ríos se encuentran con una parte de su territorio sujeto a inundaciones periódicas, debido a un proceso de urbanización creciente que en muchas ocasiones no reconoce reglas ni límites.
En esta Tesis se estudio la ciudad de Gualeguaychú, en la provincia de Entre Ríos. Para el estudio del comportamiento del río se analizó la información de caudales y alturas registrados, se realizó la modelación hidrológica de la cuenca con el modelo HEC-HMS y la modelación hidráulica del tramo inferior del río con el modelo HEC-RAS. Se analizó el crecimiento urbano de los últimos 20 años y se evaluó la modificación en el riesgo de inundaciones producido por el crecimiento urbano.
El incremento del riesgo de inundación puede producirse tanto por incremento de la amenaza como de la vulnerabilidad. Como resultado del estudio se obtuvo que el incremento de la amenaza se debe principalmente al incremento de niveles por las obstrucciones al flujo de las obras de infraestructuras realizadas y la urbanización de áreas inundables, pero este es mínimo si se compara con el incremento del riesgo que se produce por aumento de la vulnerabilidad debido a la edificación en zonas inundables, la cual tiene una tendencia que va en un aumento muy pronunciado.
Como recomendación se propone que las áreas urbanas costeras se deberían dividir en distintos sectores regulando el uso del suelo de acuerdo a las curvas de riesgo hídrico determinadas como resultados del modelo hidráulico.Many cities in the Argentine Litoral settled on the banks of the rivers are a part of its territory subject to periodic flooding, due to increasing urbanization process that often does not recognize rules or limits.
In this thesis the city of Gualeguaychú in the province of Entre Rios was studied. To study the behavior of river flow information and recorded heights we analyzed, hydrological basin modeling was performed using HEC-HMS model and hydraulic modeling of the lower section of the river with the HEC-RAS model. the urban growth of the last 20 years was analyzed and evaluated the change in the risk of flooding caused by urban growth.
The increased risk of flooding may be produced by increasing the threat or the vulnerability. As a result of the study it was found that increasing the threat is primarily due to levels increased by the obstructions to the flow of infrastructure works carried out and the urbanization of flooded areas, but this is minimal when it´s compared with increased risk caused by increased vulnerability due to the construction in flood zones, which have a tendency to go on a very pronounced increase.
As a recommendation is proposed that coastal urban areas should be divided into different sectors regulating land use according to hydric risk curves determined as results of the hydraulic model
Changes in the risk of river flooding due to urban development along plain rivers. Case study: the city of Gualeguaychú
No full textFil: Sato, Rodolfo Alejandro. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias Hídricas; Argentina.Muchas ciudades del Litoral argentino asentadas en la ribera de los ríos se encuentran con una parte de su territorio sujeto a inundaciones periódicas, debido a un proceso de urbanización creciente que en muchas ocasiones no reconoce reglas ni límites.
En esta Tesis se estudio la ciudad de Gualeguaychú, en la provincia de Entre Ríos. Para el estudio del comportamiento del río se analizó la información de caudales y alturas registrados, se realizó la modelación hidrológica de la cuenca con el modelo HEC-HMS y la modelación hidráulica del tramo inferior del río con el modelo HEC-RAS. Se analizó el crecimiento urbano de los últimos 20 años y se evaluó la modificación en el riesgo de inundaciones producido por el crecimiento urbano.
El incremento del riesgo de inundación puede producirse tanto por incremento de la amenaza como de la vulnerabilidad. Como resultado del estudio se obtuvo que el incremento de la amenaza se debe principalmente al incremento de niveles por las obstrucciones al flujo de las obras de infraestructuras realizadas y la urbanización de áreas inundables, pero este es mínimo si se compara con el incremento del riesgo que se produce por aumento de la vulnerabilidad debido a la edificación en zonas inundables, la cual tiene una tendencia que va en un aumento muy pronunciado.
Como recomendación se propone que las áreas urbanas costeras se deberían dividir en distintos sectores regulando el uso del suelo de acuerdo a las curvas de riesgo hídrico determinadas como resultados del modelo hidráulico.Many cities in the Argentine Litoral settled on the banks of the rivers are a part of its territory subject to periodic flooding, due to increasing urbanization process that often does not recognize rules or limits.
In this thesis the city of Gualeguaychú in the province of Entre Rios was studied. To study the behavior of river flow information and recorded heights we analyzed, hydrological basin modeling was performed using HEC-HMS model and hydraulic modeling of the lower section of the river with the HEC-RAS model. the urban growth of the last 20 years was analyzed and evaluated the change in the risk of flooding caused by urban growth.
The increased risk of flooding may be produced by increasing the threat or the vulnerability. As a result of the study it was found that increasing the threat is primarily due to levels increased by the obstructions to the flow of infrastructure works carried out and the urbanization of flooded areas, but this is minimal when it´s compared with increased risk caused by increased vulnerability due to the construction in flood zones, which have a tendency to go on a very pronounced increase.
As a recommendation is proposed that coastal urban areas should be divided into different sectors regulating land use according to hydric risk curves determined as results of the hydraulic model
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
