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Search Results: 1 - 10 of 106 matches for " Lesandro Ponciano "
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Finding Volunteers' Engagement Profiles in Human Computation for Citizen Science Projects
Lesandro Ponciano,Francisco Brasileiro
Computer Science , 2015, DOI: 10.15346/hc.v1i2.12
Abstract: Human computation is a computing approach that draws upon human cognitive abilities to solve computational tasks for which there are so far no satisfactory fully automated solutions even when using the most advanced computing technologies available. Human computation for citizen science projects consists in designing systems that allow large crowds of volunteers to contribute to scientific research by executing human computation tasks. Examples of successful projects are Galaxy Zoo and FoldIt. A key feature of this kind of project is its capacity to engage volunteers. An important requirement for the proposal and evaluation of new engagement strategies is having a clear understanding of the typical engagement of the volunteers; however, even though several projects of this kind have already been completed, little is known about this issue. In this paper, we investigate the engagement pattern of the volunteers in their interactions in human computation for citizen science projects, how they differ among themselves in terms of engagement, and how those volunteer engagement features should be taken into account for establishing the engagement encouragement strategies that should be brought into play in a given project. To this end, we define four quantitative engagement metrics to measure different aspects of volunteer engagement, and use data mining algorithms to identify the different volunteer profiles in terms of the engagement metrics. Our study is based on data collected from two projects: Galaxy Zoo and The Milky Way Project. The results show that the volunteers in such projects can be grouped into five distinct engagement profiles that we label as follows: hardworking, spasmodic, persistent, lasting, and moderate. The analysis of these profiles provides a deeper understanding of the nature of volunteers' engagement in human computation for citizen science projects
Considering Human Aspects on Strategies for Designing and Managing Distributed Human Computation
Lesandro Ponciano,Francisco Brasileiro,Nazareno Andrade,Lívia Sampaio
Computer Science , 2015, DOI: 10.1186/s13174-014-0010-4
Abstract: A human computation system can be viewed as a distributed system in which the processors are humans, called workers. Such systems harness the cognitive power of a group of workers connected to the Internet to execute relatively simple tasks, whose solutions, once grouped, solve a problem that systems equipped with only machines could not solve satisfactorily. Examples of such systems are Amazon Mechanical Turk and the Zooniverse platform. A human computation application comprises a group of tasks, each of them can be performed by one worker. Tasks might have dependencies among each other. In this study, we propose a theoretical framework to analyze such type of application from a distributed systems point of view. Our framework is established on three dimensions that represent different perspectives in which human computation applications can be approached: quality-of-service requirements, design and management strategies, and human aspects. By using this framework, we review human computation in the perspective of programmers seeking to improve the design of human computation applications and managers seeking to increase the effectiveness of human computation infrastructures in running such applications. In doing so, besides integrating and organizing what has been done in this direction, we also put into perspective the fact that the human aspects of the workers in such systems introduce new challenges in terms of, for example, task assignment, dependency management, and fault prevention and tolerance. We discuss how they are related to distributed systems and other areas of knowledge.
Identification of a Highly Expressed 3-Hydroxy-3-Methylglutaryl-CoA Reductase Gene in the Root Tissue of Taraxacum kok-saghyz  [PDF]
Grisel Ponciano, Grace Q. Chen
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.524376
Kazakh dandelion (Taraxacum kok-saghyz, Tk) is a rubber-producing plant currently being investigated as a source of natural rubber for industrial applications. Like many other isoprenoids, rubber is a downstream product of the mevalonate pathway. The 3-hydroxy-3-methylglutaryl-CoA reductase (HMGR) enzyme catalyzes the conversion of 3-hydroxy-3-methylglutaryl-CoA to mevalonic acid, a key regulatory step in the MVA pathway. Such regulated steps provide targets for increases in isoprenoid and rubber contents via genetic engineering to increase enzyme activities. In this study, we identify a TkHMGR1 gene that is highly expressed in the roots of Kazakh dandelion, the main tissue where rubber is synthesized and stored. This finding paves the way for further molecular and genetic studies of the TkHMGR1 gene, and its role in rubber biosynthesis in Tk and other rubber-producing plants.
Notas y comentarios respecto a la continuidad de los Se ores naturales del linaje de los Savac (Saba) en los padrones y repartimientos de tierras de 1733 y 1787 en el valle del Lurín
Paredes, Ponciano
Bulletin de l'Institut Francais d'études Andines , 2004,
Abstract: NOTES ET COMMENTAIRES AU SUJET DE LA CONTINUITE DE LA PRESENCE DES SEIGNEURS NATURELS DU LIGNAGE DES SAVAC (SABA) DANS LES RECENSEMENTS ET LES LISTES DES REPARTITION DE TERRES DE 1733 ET 1787 DANS LA VALLEE DE LURIN. La recherche dans le fonds de l Archive Général de la Nation (Lima, Pérou) permet de conna tre les listes de recensement des habitants et de répartition des terres au cours des années 1733 et 1787 dans la vallée de Lurín. On y remarque le r le prépondérant des caciques qui, de par leur condition de seigneurs naturels, réussirent pendant plus de deux siècles après la Conquête espagnole à continuer de représenter les populations dont ils avaient la charge. Ils réussirent aussi à s adapter et à continuer de réclamer, par la suite, les prérogatives sur les droits de succession de leur charge qu ils purent maintenir entre le XVI et le XIX siècles. La investigación en los fondos del Archivo General de la Nación (Lima, Perú) permite conocer los Padrones de Pobladores y los Padrones de Reparto de Tierras de los a os 1733 y 1787 en el valle del Lurín. En ambas clases de fuentes, juega un rol relevante la presencia de los caciques que, en su condición de se ores naturales, pudieron mantenerse por más de dos siglos después de la conquista hispana para seguir representando a sus pobladores y continuar adaptándose y reclamando en los nuevos tiempos las prerrogativas de sus derechos de sucesión al cargo que pudieron mantener desde el siglo XVI hasta el siglo XIX. COMMENTS AND DISCUSSION ON THE CONTINUITY ON THE NATIVE LORDS OF THE SAVAC (SABA) LINEAGE TAKEN FROM THE 1733 AND 1787 LAND DISTRIBUTION REGISTRIES IN THE LURIN VALLEY. Research in the early archives of the the Archivo General de la Nación in Lima has enabled us to become acquainted with the population census and land distribution for the years 1733 and 1787 in the Lurin valley. From both kinds of sources it can be seen that an important part was played by the presence of local caciques who were able to maintain their position as native lords, and to continue to represent their peoples for more than two centuries after the Spanish conquest. In this new era they continued to adapt and to claim the prerogatives of their rights of succession to the position they were able to maintain from the 16th to the 19th centuries.
Fibromialgia: perspectivas de um campo problemático
Aragon, Luis Eduardo Ponciano;
Interface - Comunica??o, Saúde, Educa??o , 2010, DOI: 10.1590/S1414-32832010000100013
Abstract: this paper related to studies on the contemporary processes of subjectivation and becoming ill, through an affirmative and non-reductionist approach towards fibromyalgia. a method named affirmation of the problematic field was formulated. this sought to resist dialectic approaches and denial of signs and symptoms, in order to pick up the procedurality of the set of affections and the production of signs today, using psychoanalytical, philosophical and clinical tools. indiscernibility of boundaries, multiplication of surfaces and alienation of the participating rhythms of the vital processes of individuation arose as results from the study. an approach taking the body question as a field for political, ethical and clinical incidence was therefore proposed.
A espessura do encontro
Aragon, Luis Eduardo Ponciano;
Interface - Comunica??o, Saúde, Educa??o , 2003, DOI: 10.1590/S1414-32832003000100002
Abstract: relying on the cartographic method, this article proposes an analysis of the contemporary element of medicine, by means of its interface with psychoanalysis. the cartographic method was chosen to avoid both the perspective of dialectical analysis and the isolation of the "observer" relative to the observed object. the medical scene, being technological, is open to levels of communication/contamination that exceed the usual doctor/patient relation, so that it may support the complexity of interfaces, including unconscious and virtual elements. this complexity, when taken into account, implies in a particular ethic. what is proposed is the use of a so-called "near-concept" to aid in the cartographic task of determining the levels that interfacing comprises. there is a rejection of the voluntarism that leads to the production of "conduct manuals", in order to seek "energy lines" that cross contemporary space and the duo immersed in it, such lines being regarded as pre-individual.
O conceito de resistência na Psicoterapia Grupo-Analítica: repensando um caminho
Ribeiro, Jorge Ponciano;
Psicologia: Teoria e Pesquisa , 2007, DOI: 10.1590/S0102-37722007000500013
Abstract: the author makes a study of the resistance in group based on the work of siegmund heinrich foulkes, founder of the group-analytic psychotherapy. foulkes used the concepts of the psychology of gestalt and of the theory of the field to understand the change process′ in their groups, although those references passed unnoticed, maybe for the epistemological difficulty that he found in combining psychoanalysis and those theories. the author retakes the traces of foulkes and develops, beginning with concepts of here and now, and figure and group a different vision in the foulkesian perspective, waived by him, but not developed. foulkes also has a phenomenological language which the author attempts to explore.
A resistência olha a resistência
Ribeiro, Jorge Ponciano;
Psicologia: Teoria e Pesquisa , 2007, DOI: 10.1590/S0102-37722007000500014
Abstract: resistance is a human process that happens always that the person is under menace or is in position of defending his right to be self-regulated. resistance is not, by nature, a given psychotherapeutic process. it occurs in psychotherapy, not as an opposition process against himself or to the therapist, but as a function of helping a new situation inside the person. resistance is, by nature, the actualization of the instinct of self-preservation. that is, everything that is born deserves to live, everything that emerges from the organism emerges as a necessity of the organism, that always follows of the preference law, no matter the nature of the object under observation. resistance is a contact form that cannot be destroyed, but managed, controlled, because it emerges as a defense of the totality in action. resistance is, sometime, resistance to awareness, not to contact, even if resistance is a contact form. we don't use to work with the resistance, as resistance, indeed, because if the body does not resist, it dies. we work rather the process than with the resistance in itself. the therapist also resists, it is, and even he also experiences his own self-regulation. what is generally called resistance, we call organic self-regulation process, and we work with mine of these mechanisms.
Gino Germani: post-mortem
Marmora Lelio,Torales Ponciano
Revista Colombiana de Sociología , 1979,
Abstract: Gino Germani ha muerto y con él desaparece una figura singularmente importante de las ciencias sociales en Latinoamérica. Quedan de él sus obras y sus realizaciones, la historia de su existencia y los recuerdos que de él conservamos los que entrecruzamos, dentro de la urdimbre de las relaciones sociales, nuestra vida con la suya en el anecdotario de la cotidianeidad y el vasto campo de las leyes que definen una época. Gino Germani fue en vida objeto de admiración y controversia, difícilmente ubicable dentro de un análisis frío y exhaustivo, así como ecuánime, tanto por quienes lo alabaron como por sus críticos más tenaces.
A crian?a hiperativa: uma vis?o da abordagem gestáltica
Antony, Sheila;Ribeiro, Jorge Ponciano;
Psicologia: Teoria e Pesquisa , 2004, DOI: 10.1590/S0102-37722004000200005
Abstract: the study investigated the psychological functioning of the hyperactive child according to contact cycle theory of gestalt approach, proposed by ribeiro (1997). attention deficit/hyperactivity disorder (adhd) is characterized by motor, perceptual, emotional and behavioral disturbances. according to dsm-iv (1994), the disorder comprises 18 basic symptoms of inattention, hyperactivity and impulsiveness. the research adopted a qualitative approach. the sample was composed by 20 subjects: five couples, five teachers and five children from eight to 11 years old. non-structured interviews and children's apperception test using animal figures (cat-a) were applied as instruments to collect data. we concluded that hyperactive child displays specific psychological processes forming the base of his personality, hyperactivity is the characteristic that defines the disorder, and that there is no attention deficit properly. thus, we propose a different terminology: hyperactivity/attention disorder.
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