Clodoveu Augusto Davis Jr.

Clodoveu Augusto Davis Jr.
Federal University of Minas Gerais | UFMG · Departamento de Ciência da Computação

PhD in Computer Science

About

190
Publications
35,556
Reads
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2,564
Citations
Introduction
Civil engineer from Universidade Federal de Minas Gerais (1985), Master's in Computer Science from Universidade Federal de Minas Gerais (1992) and PhD in Computer Science from Universidade Federal de Minas Gerais (2000). He is a professor at the Computer Science Department of UFMG, teaching graduate and undergraduate courses, and is the current coordinator of the Graduate Program on Computer Science. Main research interest subjects: spatial databases, spatial data infrastructures, geographic information systems (GIS), geoprocessing, geographic data modeling, geocoding and urban GIS applications. Web page: http://www.dcc.ufmg.br/~clodoveu ORCID: 0000-0002-7327-848X ThomsonReuters ResearcherID: N-5659-2016 Scopus AuthorID: 7404356087 Google Scholar: https://scholar.google.com.br/citations?user=Ov9xlMIAAAAJ ResearchGate: https://www.researchgate.net/profile/Clodoveu_Davis_Jr DBLP: http://dblp.uni-trier.de/pers/hd/d/Davis_Jr=:Clodoveu_A= CNPq Research Groups: Applied and Interdisciplinary Computing on Social and Urban Networks: http://dgp.cnpq.br/dgp/espelhogrupo/5157458818548870 Geoprocessing for Urban and Environmental Landscape Management: http://dgp.cnpq.br/dgp/espelhogrupo/4855923080216881
Additional affiliations
July 2008 - present
Federal University of Minas Gerais
July 2008 - present
Federal University of Minas Gerais
Position
  • Professor (Associate)
February 2002 - July 2008
Education
March 1996 - September 2000
Federal University of Minas Gerais
Field of study
  • Computer Science
March 1988 - March 1992
Federal University of Minas Gerais
Field of study
  • Computer Science
March 1980 - March 1985
Federal University of Minas Gerais
Field of study
  • Civil Engineering

Publications

Publications (190)
Conference Paper
Full-text available
Urbanization in Brazilian cities often occurs without adequate planning. An example of this are urban drainage systems, that usually do not receive the proper attention from the public authorities. Therefore, drainage systems are often improvised or constructed in an emergency or provisional way, without adequate study. Furthermore, climate change...
Article
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In the last few years, vehicle sharing has driven a gradual switch from ownership-based private mobility to service usage as a sustainable urban transport alternative. A significant number of cities have implemented mobility sharing programs. Shared transport reduces both traffic congestion, and the need for parking space, decreasing the number of...
Article
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One of the most significant challenges in cities concerns urban mobility. Urban mobility involves the use of different modes of transport, which can be individual or collective, and different organizations can produce their respective datasets that, usually, are used isolated from each other. The lack of an integrated view of the entire multimodal...
Chapter
Shared mobility has emerged in urban spaces as an alternative to owning and maintaining a vehicle, by allowing flexible and short-term mobility services at low costs. These mobility options act as promising sources of trips benefiting people in vulnerable groups and enabling them to access essential services such as healthcare and providing transpo...
Article
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Smart cities are characterized by the use of massive information and digital communication technologies as well as sensor networks where the Internet and smart data are the core. This paper proposes a methodology to geocode traffic-related events that are collected from Twitter and how to use geocoded information to gather a training dataset, apply...
Article
Carsharing services aim at offering short-term car rentals. Those rentals can be offered in different modalities, such as round-trip and one-way. This work simulates the dynamics of possible carsharing clients searching for resources availability and using the carsharing service. Clients can rent a vehicle if there is an available car at the client...
Conference Paper
Full-text available
Amid the expansion of shared-economy products, carsharing services aim to offer short-term car rentals. An optimized fleet-size allocation for each service station is important for serving as many clients as possible, maximizing the company's profit. This work proposes and compares the computational performance of two Mixed-Integer Linear Programmi...
Conference Paper
Full-text available
Carsharing services aim to offer short-term car rentals, including round-trip and one-way alternatives. Round-trip clients must deliver the rented car at the same station where the rental has started. One-way clients can return the vehicle in a different station. This work proposes a Mixed-Integer Linear Programming Model to optimize the fleet-sizi...
Conference Paper
Este artigo propõe uma aplicação web para levantamento e precificação da documentação referente à regularização ambiental em Minas Gerais. O processo para obtenção de uma licença é constituído de cinco etapas: 1-caracterização, 2- enquadramento CNAE, 3-formalização, 4-análise e 5-julgamento, sendo que nas etapas 1 e 2 os recursos humanos e financei...
Article
Vehicle tracking is a spatio‐temporal source of high‐granularity travel time information that can be used for transportation planning. However, it is still a challenge to combine data from heterogeneous sources into a dynamic transport network, while allowing for network modifications over time. This article uses conceptual modeling to develop mult...
Article
Full-text available
In this manuscript, we identify and evaluate some of the most used optimization models for rule extraction using genetic programming-based algorithms. Six different models, which combine the most common fitness functions, were tested. These functions employ well-known metrics such as support, confidence, sensitivity, specificity, and accuracy. The...
Article
Full-text available
Carsharing services aim to offer short-term car rentals, including round-trip and one-way alternatives. Round-trip clients must deliver the rented car at the same station where the rental has started. One-way clients can return the vehicle in a different station. This work proposes a Mixed-Integer Linear Programming Model to optimize the fleet-sizi...
Article
Full-text available
The increase in urban population, together with the expansion of cities, has motivated the study of improvements for dynamics aspects of daily urban life. An important portion of these dynamic aspects is related to the population's routine activities, like commuting using public transportation. This work proposes two meta-heuristics and one integer...
Article
The present challenge faced by scientists working with Big Data comes in the overwhelming volume and level of detail provided by current data sets. Exceeding traditional empirical approaches, Big Data opens a new perspective on scientific work in which data comes to play a role in the development of the scientific problematic to be developed. Addre...
Article
Full-text available
Motivation Web 2.0 disseminated the possibility of engaging citizens in data collection initiatives, also known as Volunteered Geographic Information (VGI), a type of crowdsourcing. This project was conceived based on the need to quickly develop and publish geographic data collection tools and resources that could be customized to any relevant them...
Conference Paper
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Abstract. The expansion of cities, together with the advance of technological resources, has motivated the study of improvements for metropolitan dynamics. Among these improvements are those aiming to facilitate and to speed up the population’s routine activities. This work proposes and compares two methods to optimize the location of new pick-up a...
Conference Paper
Full-text available
One of the most interesting challenges for urban geographic applications is the integration of multiple heterogeneous data sources. Given current limitations in the access to official data, in spite of modern Open Governmental Data policies, it is necessary to assess whether unofficial data sources can be used to replace official ones, or used alon...
Conference Paper
Full-text available
Geometric primitives defined by OGC and ISO standards, implemented in most modern spatially-enabled database management systems (DBMS), are unable to capture the semantics of richer representation types, as found in current geographic data models. Moreover, relational DBMSs do not directly extend referential integrity mechanisms to cover spatial re...
Article
Analyzing the research productivity of a country, an academic institution or even a single research group contributes to understand how science evolves and discovers new research perspectives, since such efforts usually reveal key aspects that can be improved, avoided or even applied to other contexts. In this article, we present a detailed analysi...
Conference Paper
Full-text available
A great quantity of information is required to support urban planning. Usually there are many (not integrated) data sources, originating from different government bodies, in distinct formats and variable properties (e.g. reliability, completeness). The effort to handle these data, integrate and analyze them is high, taking to much time for the info...
Article
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Geographic information of public interest is routinely produced by several public agencies. At the same time, the use of smartphones and other mobile devices generates an increasing amount of unofficial georeferenced data. Although official data have usually higher reliability, it takes longer for governmental organizations to put together relevant...
Chapter
Several indicators are developed to support the decision-making processes in public policy for urban planning. Some of them seek to measure the quality of urban life. For example, the city of Belo Horizonte developed and uses an index called Quality of Urban Life Index, which identifies inequalities within the city, and therefore, those areas that...
Article
Gazetteers are instrumental in recognizing place names in documents such as Web pages, news, and social media messages. However, creating and maintaining gazetteers is still a complex task. Even though some online gazetteers provide rich sets of geographic names in planetary scale (e.g. GeoNames), other sources must be used to recognize references...
Article
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The large amount of publicly available scholarly data today has allowed exploration of new aspects of research collaboration, such as the evolution of scientific communities, the impact of research groups and the social engagement of researchers. In this paper, we discuss the importance of characterizing the trajectories of faculty members in their...
Article
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The prevention and control of dengue are great public health challenges for many countries, particularly since 2015, as other arboviruses have been observed to interact significantly with dengue virus. Different approaches and methodologies have been proposed and discussed by the research community. An important tool widely used is modeling and sim...
Article
Recognizing references to places in texts is needed in many applications, such as search engines, location-based social media and document classification. In this paper we present a survey of methods and techniques for the recognition and identification of places referenced in texts. We discuss concepts and terminology, and propose a classification...
Article
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A large amount of geographic information is contained in text documents available in the Web. For instance, forum messages posted by students in Massive Open Online Courses (MOOCs) may contain references to places. Unfortunately, this information is not exploited, although it can be useful to further understand the topics of the courses. Therefore,...
Article
Human ability to understand approximate references to locations, disambiguated by means of context and reasoning about spatial relationships, is the key to describe spatial environments and to share information about them. In this paper, the authors propose an approach for geocoding that takes advantage of the spatial relationships contained in the...
Article
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O artigo propõe uma metodologia de simulação da quantidade máxima de domicílios comportada por cada quadra do município de Belo Horizonte. Os parâmetros utilizados na simulação foram extraídos das informações cadastrais da Prefeitura, associadas com os resultados dos Censos 2000 e 2010. A simulação é desenvolvida a partir de uma base georreferencia...
Conference Paper
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Nowadays social networks provide information with high correlation with events that are occurring in the worldwide. Twitter is a microblogging network of real time posts in which people know different classes of events such as concerts, festivals, demonstrations, etc. Other relevant topic is traffic congestions; user-generated content is useful to...
Article
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The growth of Brazilian scientific production in recent years is remarkable, which motivates an investigation on the factors, inside and outside the country, that helped shape this wealthy research environment. This article provides a thorough analysis of the education of researchers that constitute the main Brazilian research groups, using data on...
Conference Paper
Full-text available
Este artigo apresenta a CollabViz, uma ferramenta online para análise e visualização da formação da rede acadêmica brasileira dos programas de pós-graduação em Ciência da Computação.
Conference Paper
Full-text available
There are currently many approaches in the context of crowdsourcing and crowdsensing that use geographical data. However, there is no taxonomy to differentiate the features of such systems. The goals of this work are twofold: to classify the data collection processes in geo-located applications and to identify the main challenges for a new type of...
Conference Paper
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This paper presents association rule mining on data from a poll on the interest of undergraduate students on a range of graduate courses offered by a university. The goal was to uncover unexpected relationships among courses, to support the decision making process as to the potential competition among them. Generation of association rules allowed t...
Conference Paper
Selecting the appropriate data management infrastructure is still a hard task for the designers of mobile applications with large volumes of data. Considering NoSQL needs for such applications, this paper demonstrates how the physical implementation of the database may impact query performance. Specifically, we consider the needs of mobile users th...
Chapter
This chapter examines the relationship between geodesign and crowdsourcing, informing urban planning by collecting the opinions of stakeholders. It focuses on conditions for facilitating democratic participation in urban planning in light of the Brazilian legal framework, and on possible interactions between participatory urban planning and crowdso...
Article
The determination of the geographic scope of documents is important for many applications in geographic information retrieval (GIR). Many techniques require the use of gazetteers as a source of reference data. However, creating and maintaining gazetteers is still a complex and demanding task. We propose using linked data sources to put together gaz...
Conference Paper
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Data modeling tools are useful in software development and in database design. Some advanced modeling tools available in the market go beyond the data modeling process and allow the generation of source code or DDL scripts for RDBMSs based on the modeled schema. This work presents OMT-G Designer, a web tool for modeling geographic databases using O...
Article
In recent years, spatial data infrastructures (SDIs) have gained great popularity as a solution to facilitate interoperable access to geospatial data offered by different agencies. In order to enhance the data retrieval process, current infrastructures usually offer a catalog service. Nevertheless, such catalog services still have important limitat...
Article
This paper introduces a multi-objective algorithm based on genetic programming to extract classification rules in databases composed of hybrid data, i.e., regular (e.g. numerical, logical, and textual) and non-regular (e.g. geographical) attributes. This algorithm employs a niche technique combined with a population archive in order to identify the...
Article
People seeking academic careers usually pursue degrees in various institutions, looking for the best combinations regarding their intellectual interests, their personal means and the opportunities that arise in their lives. This can be perceived by looking at the stages in the education of current researchers, as recorded in their curricula vitae....
Article
Usually, images can be seen as sets of pixels or as fields over a reference space. While the former view allows image processing to function using pixel manipulation algorithms, the second one is closer to a wider understanding of what people perceive in an image. The pixel aspect is much closer to the measurement, to observations, while fields are...
Conference Paper
Web multimedia content has reached much importance lately. One of the most important content types is online video, as demonstrated by the success of platforms such as YouTube. The growth in the volume of available online video is also observed in corporate scenarios, such as TV station. This paper evaluates a set of corporate online videos hosted...
Conference Paper
Full-text available
Web content has gained much importance lately. One of the most important content types is online video, as demonstrated by the success of platforms such as YouTube. The growth in the volume of available online video is also observed in corporate scenarios, such as TV networks. This paper evaluates a set of corporate online videos hosted by Sambatec...
Article
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This paper proposes a framework to be used in the creation of various volunteered geographic information applications, incorporating both Web-based tools and mobile applications (apps). The framework includes the elements required to customize the information collection, while using a unified structure and interface across Web and mobile platforms....
Article
The coffee is extremely important activity in southern of Minas Gerais and techniques for estimating acreage, seeking reliable crop forecasts are being intensely investigated. It is presented in this study, an application of Artificial Neural Networks (ANN) for the automatic classification of remote sensing data in order to identify areas of the co...
Article
Linked Geospatial Data is a proposal for the dissemination of geographic information in an open format, based on standards adopted by the Web of Data. The semantic enrichment that comes from knowledge about relationships among spatial data is a potential source of solutions for traditional problems in geographic information retrieval, such as ambig...
Conference Paper
Twitter has become one of the most popular platforms for sharing user-generated content, which varies from ordinary conversations to information about recent events. Studies have already showed that the content of tweets has a high degree of correlation with what is going on in the real world. A type of event which is commonly talked about in Twitt...
Article
The efficiency of a geographic database is directly related with the quality and completeness of its contents. In the case of gazetteers, i.e., place name dictionaries, previous work proposed ontological extensions based on the storage of geographic shape and on multiple types of relationships among places. However, in order to be more useful, gaze...
Article
The standardization of the Structured Query Language (SQL) was important for the popularity of relational databases. The SQL learning process is supported by several resources, such as simulators and interactive tools. However, as far as we could ascertain, there are no tools to promote the learning of spatial extensions to SQL in geographic databa...
Article
Urban addresses are one of the most important ways to express a geographic location in cities. Many conventional information systems have attributes for addresses in order to include an indirect reference to space. Obtaining coordinates from addresses is one of the most important geocoding methods. Such activity is hindered by frequent variations i...
Article
Geographic information and geo-technologies are essential for the municipal administration to learn the reality of the city and its infrastructure. Spatial Data Infrastructures promote data sharing and access to data by the community in an easy and effective way. However, acquisition and update of spatial data has changed in recent years because it...
Article
User interaction in social networks, such as Twitter and Facebook, is increasingly becoming a source of useful information on daily events. The online monitoring of short messages posted in such networks often provides insight on the repercussions of events of several different natures, such as (in the recent past) the earthquake and tsunami in Jap...
Article
Geocoding urban addresses usually requires the use of an underlying address database. Under the influence of the format defined for TIGER files decades ago, most address databases and street geocoding algorithms are organized around street centerlines, associating numbering ranges to thoroughfare segments between two street crossings. While this me...
Article
Full-text available
The volume of spatial information on the Web grows daily, both in the form of online maps and as references to places embedded in documents and pages. Considering the spatial information needs of users, it is often necessary to recognize, within a document’s text, the places to which it refers. This article presents a next-generation gazetteer, a t...
Article
Full-text available
When users need to find something on the Web that is related to a place, chances are place names will be submitted along with some other keywords to a search engine. However, automatic recognition of geographic characteristics embedded in Web documents, which would allow for a better connection between documents and places, remains a difficult task...
Chapter
Geographic information and geo-technologies are essential for the municipal administration to learn the reality of the city and its infrastructure. Spatial Data Infrastructures promote data sharing and access to data by the community in an easy and effective way. However, acquisition and update of spatial data has changed in recent years because it...
Article
Full-text available
Spatial data encoded in GML documents are used in various applications and are especially suited to storing, manipulating and exchanging geographic information. However, a large share of currently available spatial data is stored in spatial databases. This article presents a method to map arcs and nodes, organized in a network using spatial relatio...