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Search Results: 1 - 10 of 325981 matches for " S. S. Botelho "
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Collaborative Intelligence in Smart Cities: A Systematic Review  [PDF]
Viviani Kwecko, Silvia S. da C. Botelho
Social Networking (SN) , 2018, DOI: 10.4236/sn.2018.73015
Abstract:
The objective of this research is to present a systematic analysis, in which we seek to identify the concepts of intelligent city, with the intention of recognizing the nature of this intelligence before the participation of the population. Therefore, the research associates concepts as smart cities, citizen participation and social web, identifying publications between 2012 and the first quarter of 2018 and questioning what the intelligent city is and how this concept is able to (re)organize the learning processes of the territory from the informal dynamics of the contemporary city. The qualitative analysis of the documents revealed an innumerable of definitions and related terms: smart, intelligent, ubiquitous, digital, knowledge, sustainable, crowd sourcing, innovative; structured in three types of approaches: technological focus, focus on human resources and focus on citizen-related governance from the following domains: media convergence, public and regulatory information policies, infrastructure management, real-time data mining and extraction, geographic information system, crowd computing, smart cities education, and social monitoring and control. In spite of the access to a great amount of data, we verify that the concept of intelligent city is referenced by a significant number of researches, but, in smaller number, works that present models of construction of a collective intelligence for the city. From this perspective, we identified the need to recognize technological education interventions for communication between individuals and the city. Because we believe that only through the implementation and management of techno-educommunication ecosystems will be able to promote a culture of participation.
Self evaluated oral status impact on quality of life
Fabiana Andrade Botelho Mesquira,S?nia Vieira
RGO : Revista Gaúcha de Odontologia , 2009,
Abstract: Objective: To associate people’s perception of the impact of oral health and disease status on the quality of life, with the following variables: Age bracket, socioeconomic conditions, educational level, dentition status, use of dental services, and oral hygiene habits.Methods: A subjective indicator (OHIP-14) was used to evaluate people’s perception of the impact of the self-evaluated oral health status on the quality of their own lives. A survey was made of demographic data, dentition status, use of dental services and oral hygiene habits. The sample was constituted by employees of state schools in the city of Montes Claros, Minas Gerais, Brazil. Statistical analysis was performed by parametric tests using the SPSS program. Results: The elderly perceived and recorded greater functional limitation and more pain than young persons. Edentulous perceived and recorded greater functional limitation and physical incapacity than dentate persons. Persons that required dental prostheses felt the impact of this situation on the quality of life. Better oral health is associated with better economic conditions, higher educational level, seeking paid dental services for prevention or routine care and regular use of dental hygiene instruments.Conclusion: The oral health and disease status perceived by people is associated with the researched variables. As people perceive the impact of oral health on the quality of life, more conditions to seek dental services for prevention or routine care and the regular use of dental hygiene instruments would improve the population’s oral health.
Learning by Observation of Agent Software Images
Paulo Roberto Costa,Luís Miguel Botelho
Computer Science , 2014, DOI: 10.1613/jair.3989
Abstract: Learning by observation can be of key importance whenever agents sharing similar features want to learn from each other. This paper presents an agent architecture that enables software agents to learn by direct observation of the actions executed by expert agents while they are performing a task. This is possible because the proposed architecture displays information that is essential for observation, making it possible for software agents to observe each other. The agent architecture supports a learning process that covers all aspects of learning by observation, such as discovering and observing experts, learning from the observed data, applying the acquired knowledge and evaluating the agents progress. The evaluation provides control over the decision to obtain new knowledge or apply the acquired knowledge to new problems. We combine two methods for learning from the observed information. The first one, the recall method, uses the sequence on which the actions were observed to solve new problems. The second one, the classification method, categorizes the information in the observed data and determines to which set of categories the new problems belong. Results show that agents are able to learn in conditions where common supervised learning algorithms fail, such as when agents do not know the results of their actions a priori or when not all the effects of the actions are visible. The results also show that our approach provides better results than other learning methods since it requires shorter learning periods.
The Lifshitz Transition in d-wave Superconductors
S. S. Botelho,C. A. R. Sá de Melo
Physics , 2004, DOI: 10.1103/PhysRevB.71.134507
Abstract: The BCS to BEC evolution has been recently the focus of studies in superconductors and cold atomic gases. For a d-wave system, we show that a Lifshitz transition occurs at a critical particle density which separates two topologically distinct phases: a BCS-like gapless superconductor/superfluid in the higher density limit and a BEC-like fully gapped superconductor/superfluid in the lower density limit. This transition is second order according to Ehrenfest's classification, but it occurs without a change in the symmetry of the order parameter, and thus can not be classified under Landau's scheme. To illustrate the nature of the transition, we compute the compressibility and the superfluid density as functions of particle density.
BCS to BEC Quantum Phase Transition in Spin Polarized Fermionic Gases
S. S. Botelho,C. A. R. Sá de Melo
Physics , 2004,
Abstract: We discuss the possibility of a quantum phase transition in ultracold spin polarized fermionic gases which exhibit a p-wave Feshbach resonace. We show that when fermionic atoms form a condensate that can be externally tuned between the BCS and BEC limits, the zero temperature compressibility and the spin susceptibility of the fermionic gas are non-analytic functions of the two-body bound state energy. This non-analyticity is due to a massive rearrangement of the momentum distribution in the ground state of the system. Furthermore, we show that the low temperature superfluid density is also non-analytic, and exibits a dramatic change in behavior when the critical value of the bound state energy is crossed.
The debate about quotas in Brazilian public universities from 2001 to 2009: a preliminary analysis
BOTELHO Juliana S.,MAIA, Rousiley C. M.,MUNDIM, Pedro S.
Revista Compolítica , 2011,
Abstract: This paper aims at presenting some preliminary findings of an ongoing research on the public debate over the racial quota policy in Brazilian public universities, from 2001 to 2009, in the following newspapers: Folha de S. Paulo, O Globo and Estado de Minas. Our research distinguishes itself from previous studies because our corpus (692 articles) is wider hes and our unity of analysis consists of direct and indirect utterances (n=1037) that present any type of opinion upon racial quota policies. Our preliminary analysis reveals some very counter-intuitive findings: 1) we observed a polarization of opinions against and for the racial quota policy in editorial columns and op eds; 2) we noticed that common citizens are the most prominent speaker in the debate, surpassing actors who usually have privileged access to news media, such as federal government officers and experts. Our investigation about the category of speakers in the debate and our inquire into how their utterances are organized and hierarchised in the media arena show important tensions underpinning the media organizations, both on the inter-institutional levels and the journalistic social practices levels.
Quantum Phase Transition in the BCS-to-BEC Evolution of p-wave Fermi Gases
S. S. Botelho,C. A. R. Sa de Melo
Physics , 2005, DOI: 10.1007/s10909-005-7324-3
Abstract: We discuss the possibility of a quantum phase transition in ultra-cold spin-polarized Fermi gases which exhibit a p-wave Feshbach resonance. We show that when fermionic atoms form a condensate that can be externally tuned between the BCS and BEC limits, the zero temperature compressibility and the spin susceptibility of the fermionic gas are non-analytic functions of the two-body bound state energy. This non-analyticity is due to a massive rearrangement of the momentum distribution in the ground state of the system. Furthermore, we show that the low temperature superfluid density is also non-analytic, and exhibits a dramatic change in behavior when the critical value of the bound state energy is crossed.
Static phase and dynamic scaling in a deposition model with an inactive species
S. S. Botelho,F. D. A. Aarao Reis
Physics , 2001, DOI: 10.1103/PhysRevE.65.032101
Abstract: We extend a previously proposed deposition model with two kinds of particles, considering the restricted solid-on-solid condition. The probability of incidence of particle C (A) is p (1-p). Aggregation is possible if the top of the column of incidence has a nearest neighbor A and if the difference in the heights of neighboring columns does not exceed 1. For any value of p>0, the deposit attains some static configuration, in which no deposition attempt is accepted. In 1+1 dimensions, the interface width has a limiting value W_s ~ p^{-\eta}, with \eta = 3/2, which is confirmed by numerical simulations. The dynamic scaling relation W_s = p^{-\eta} f(tp^z) is obtained in very large substrates, with z=\eta.
Vortex-Antivortex Lattice in Ultra-Cold Fermi Gases
S. S. Botelho,C. A. R. Sa de Melo
Physics , 2005, DOI: 10.1103/PhysRevLett.96.040404
Abstract: We discuss ultra-cold Fermi gases in two dimensions, which could be realized in a strongly confining one-dimensional optical lattice. We obtain the temperature versus effective interaction phase diagram for an s-wave superfluid and show that, below a certain critical temperature T_c, spontaneous vortex-antivortex pairs appear for all coupling strengths. In addition, we show that the evolution from weak to strong coupling is smooth, and that the system forms a square vortex-antivortex lattice at a lower critical temperature T_M.
Low-Cost Sensors Calibration for Monitoring Air Quality in the Federal District—Brazil  [PDF]
Erick Frederico Kill Aguiar, Henrique Llacer Roig, Luís Henrique Mancini, Eduardo Neiva Caetano Botelho de Carvalho
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.62019
Abstract: Critical situations that cannot be solved by conventional approaches (traditional air quality monitoring networks), have the possibility of being managed quickly by a wide network of portable systems with sensors. The purpose of this research was to calibrate and validate low-cost sensors. Pilot indoor and outdoor areas, in the central area of Brasilia (Brazil’s capital city) were chosen for corporative performance evaluation of the sensors. The CO at 99.999% volumetric injection method has been used in a gas test box, among two MiCS-5521 (CO/VOC) sensors, one being new and the other one with a short useful life. The number of injections adopted to each volume (from 1 ml to 6 ml) was 10, rising each sensor’s confidence interval mean. A increase of the injected volume (ml) of CO resulted in significant decrease in a resistance (Ohms), as shown by a good inverse relationship on the interaction of these two variables (r = 0.88), with good measurement accuracy, when compared to the manufacturer’s reference datasheet. Finally, a geospatial management system was built for the pollution data measured by the low-cost sensors.
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