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Dynamic geometry: An agent for the reunification of algebra and geometry
Meira Hockman
Pythagoras , 2011, DOI: 10.4102/pythagoras.v33i3.119
Abstract: This paper investigates the degree of separation or unity between the algebraic and geometric modes of thought of students in tertiary education. Case studies indicate that as a student is inducted into the use of algebra the insightful and visual components of geometrical and graphical modes of thought are sidelined. Based on Vygotsky’s taxonomy of the psychogenesis of cultural forms of behaviour, I suggest that this separation occurs because the algebraic methods remain fixed at a na ve or algorithmic stage. The algebraic concepts may fail to be internalised because the stage of instrumental functioning of algebra as a ‘tool’ or ‘method’ of geometry is not successfully transitioned. I suggest that this stage of instrumental functioning may be stimulated by using dynamic geometry programs to promote the formation of images in conjunction with algebraic representations in problem solving. In this way the modes of thought in algebra and geometry in mathematics may be reunified.
Genetic and Environmental Influences on Perceptual-Motor Abilities  [PDF]
Cassio M. Meira Jr., Marcelo Massa
Psychology (PSYCH) , 2017, DOI: 10.4236/psych.2017.811110
Abstract: Ability poses limitations on a person’s potential for success in a given task. Perceptual-motor abilities are thought to be traits regarded as having been either genetically determined or developed through motor experience. This study examined genetic and environmental influences on perceptual-motor abilities in twins (13 sets of monozygotic and 18 sets of dizygotic, mean age = 17.2 ± 3.5 years) by measuring the performance on tasks whose main underlying perceptual-motor abilities are rate control, simple reaction time, hand-eye coordination, finger dexterity, and manual force control. The results suggest that little support was given to Turkheimer’s Laws of Behavior Genetics, as high proportions of variance on the performance were attributable to 1) additive genetic factors for rate control only, 2) shared family environment for finger dexterity and hand-eye coordination, and 3) nonshared environment for rate control and simple reaction time.
As raízes do Brasil no espelho de próspero
Monteiro, Pedro Meira;
Novos Estudos - CEBRAP , 2009, DOI: 10.1590/S0101-33002009000100009
Abstract: prospero's mirror is one further step in the latin americanist passion that brings together authors such as darío, martí, rodó, mariátegui, manoel bonfim, sérgio buarque de holanda and gilberto freyre - a whole lineage of writers who delineate the fantastic space of "another" america, thought of, and felt, in contrast to her northern big brother. beginning in the 19th century, a north american mirror reshapes the shakespearean geography which impressed sérgio buarque de holanda, and which would haunt him while he composed raízes do brasil in exile. even though holanda's classic book is not explicitly used in prospero's mirror, one can think that morse's own book is a sort of re-writing of raízes do brasil, going into more depth in the ibero-american promise that also shines in buarque de holanda's horizon.
Educación ambiental en tiempos de catástrofe: la respuesta educativa al naufragio del Prestige
Meira Cartea, Pablo Angel;
Educa??o e Pesquisa , 2005, DOI: 10.1590/S1517-97022005000200009
Abstract: in november 2002, the prestige, an obsolete oil tanker, sank and spilled her cargo offshore galicia (in the northwest of the iberian peninsula). this accident originated a social experiment, unwanted but valuable to understand how the catastrophic experience of the "manufactured risks" is socially represented. the present article analyzes the response of the regional education system to the catastrophe from two viewpoints: a) of its comprehension in the context of the critical and proactive social response to the official intent of representing a "non-catastrophe", and b) of the role of environmental education (ee) as a pedagogical praxis whose political dimension is revealed as indispensable. the thesis we shall defend is that the political nature of ee, many times just implicit and others explicitly denied, is recognized here as the fundamental axis in the response of the education system and of other education agents. in this sense, the catastrophe has not been just ecological but also, and foremost, social and political by questioning the economic globalization - its profound cause - and by putting in evidence the vulnerability of the administrations, incapable of preventing or mitigating its impact on the environment and on the human communities. in this scenario, ee contributes to the reflection about the origin of the catastrophe as an unforeseen consequence of the "advanced modernity", in conformity with the analysis by ulrich beck of the "risk society", and of the politizing potential of the successive catastrophes - the tip of the iceberg - in which the new social ethos is manifested and constructed.
Interdisciplinaridade na escola: subsídios para uma Zona de Desenvolvimento Proximal como espa?o simbólico
Frade, Cristina;Meira, Luciano;
Educa??o em Revista , 2012, DOI: 10.1590/S0102-46982012000100016
Abstract: ments to the conceptualization: the zone of development in proximity (zdp), as a symbolic space that has a semiotic aspect (that mediates meaning of language and symbols), as proposed by meira and lerman (2010). such elements are derived from the analysis of an interdisciplinary piece of research carried out by two teacher-researchers one a mathematician, the other a scientist, both teaching the same year nine secondary class, at a public school in belo horizonte, brazil. this analysis shows how, and under which circumstances, such interdisciplinary work challenges or encourages the students to "cross the boundaries" between the two disciplines. based on two learning episodes, the notion of zdp as a symbolic space is reinforced, and the fragility and instability of zdps are discussed.
Reclamos da lavoura: a defini??o do programa de prioridades da indústria sacarina no Primeiro Congresso Nacional de Agricultura
Meira, Roberta Barros;
História (S?o Paulo) , 2012, DOI: 10.1590/S0101-90742012000200015
Abstract: this paper proposes a reflection on the influence of the national society of agriculture in the implementation of technical improvements in the agriculture and in the modern sugar mills in the "primeira república". in analyzing the speech of rural rallies, assemblies and agricultural exhibitions organized by the sna or the manifestations of farmers, technicians and statesmen in the various studies published in the period, we see that the society could be defined as a disseminator of ideas center of agricultural modernization, advocated by so-called "progressive farmers". thus, emphasis was placed on the ideas raised during the first national congress of agriculture. in this sense, it attempts to show the influence of the principles of association and what their role would be after their suitability by the owners felt the need to modernize agricultural production, deploying a hand-free labor in the post-abolition and stop the action of speculators. furthermore, we look into the decisions on the so-called "progressive farmers" to renew the plantation, through new methods of cultivation propagated by agronomic institutes, model farms, schools practices, among others. the objective of this communication is to relate the ideas advocated by the sna and so-called "progressive farmers" and his role in "crisis" sugar industry in brazil.
Comparison of risk factors among blood donors, volunteers and replacement individuals, infected or not by hepatitis C virus
Felippe, MJDB;Meira, DA;
Journal of Venomous Animals and Toxins including Tropical Diseases , 2009, DOI: 10.1590/S1678-91992009000100010
Abstract: hepatitis c is transmitted primarily parenterally by contaminated blood and is often associated with: intravenous drug abuse, invasive procedures, blood transfusions, acupuncture, tattooing, and alcohol and tobacco use. this study aimed to quantify and evaluate the risk factors among blood donors, volunteer blood donors and replacement individuals, infected or not by the c virus. the main transmission routes of c virus were identified in 55 men and 25 women (gi) monitored by the ambulatory unit of the department of tropical diseases, botucatu medical school, and in 24 men and 26 women (gii), all active blood donors at the bauru state hospital transfusional agency. both groups were similar in: tobacco and alcohol consumption, sexual behavior, tattooing and illicit drug use. the duration of alcohol and tobacco consumption and blood transfusions in gi were longer, whereas the option for steady partners, condom use, disposable materials and piercings were predominant in gii. in conclusion, the risk factors for hepatitis c demonstrate the necessity of health policies that act on the primary and secondary prevention levels (respectively, reduction of infection incidence and hepatopathy risk).
Oui, mais il faut parier: fidelidade e dúvida no Memorial de Aires
Monteiro, Pedro Meira;
Estudos Avan?ados , 2008, DOI: 10.1590/S0103-40142008000300018
Abstract: this article investigates the role played by beethoven's fidelio in machado de assis' memorial de aires. in this extraordinary novel, counselor aires avoids condemning a woman who, nevertheless, is put under suspicion by his treacherous diary. in the opera, leonora hides nothing, because behind her mask there is nothing but loyalty to her imprisoned husband. machado de assis, however, begins his novel in a cemetery, where the beloved husband is buried. the main question that is left is: what to do if fidelity refers to an object, be it the beloved or a literary referent, that does not exist any longer?
Vida e poesia na janela
Monteiro, Pedro Meira;
Estudos Avan?ados , 1998, DOI: 10.1590/S0103-40141998000300026
Abstract: this paper is an attempt at analysing a poem by manuel bandeira, called lua nova, composed in 1953 in rio de janeiro. reading the verses in the light of some dilthey's reflections, i look for the expression of the poet's experiences, then trying to understand, through lua nova, his constant refusal of all excess and his serene acceptance of life's rhythm, which contains as an inevitable and deeply significant end death itself.
Cairu e a patologia da Revolu??o
Monteiro, Pedro Meira;
Estudos Avan?ados , 2003, DOI: 10.1590/S0103-40142003000300022
Abstract: this article intends to recover, in broad strokes, the corrective nature of the moralizing discourse of josé da silva lisboa, the visconde of cairu, in his constitui??o moral e deveres do cidad?o (moral constitution and duties of the citizen) (1824-1825), and to suggest, through the use of that treatise's brilliant passagens, how the image of revolution, modeled on the doubly "catastrophic"experiences of france and haiti, projects itself onto the scenario of the nascent new empire. in silva lisboa's conservative register, the moralizing discourse seems capable of founding a new order in the tropic, og protecting "brazilian youth" from the seduction of renovating principles, of maintaining firm and well-tied the knots of a social fabric threatened by the madness of revolutionaries, who brought to the horizon of a young nation the danger of dissolotion and corruption of the body politic.
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