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Search Results: 1 - 10 of 151 matches for " Streck "
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Ethnologie und Tsiganologie. Warum studieren wir überrollte“ Kulturen?/Anthropology and Gypsy Studies. Why are we interested in overrolled“ cultures?
Bernhard Streck
Behemoth : a Journal on Civilisation , 2011,
Abstract: Gypsy Studies (in German: Tsiganologie) on the one side have a long tradition since the 18th century,on the other side it is still difficult to define it between social or cultural anthropology (in German:Ethnologie) and sociology. The Leipzig Forum Tsiganologische Forschung has collected data whichcan be explained by a paradigm of order and para-order, two systems of thinking and doing closelyconnected and interdependent, but in an asymmetric way, comparable with the relation of mother anddaughter. Whereas anthropology tries to understand what sometimes is described as the recent losersof the civilization process, Gypsies represent a traditional skill of being marginalized, a certain wayof mastering para-orders, which could be relevant for all other “overrolled” communities.
Editorial
Bernhard Streck
Behemoth : a Journal on Civilisation , 2011,
Abstract:
Educa??o e transforma??o social hoje: alguns desafios político-pedagógicos
Streck,Danilo R.;
Revista Lusófona de Educa??o , 2009,
Abstract: the article discusses possibilities and limits of a transforming pedagogy today. the reflection begins with an attempt to identify some characteristics of present day education. there are pointed out two facts that may be of particular importance for an exercise of synthesis: the so called crisis of utopias and the reconfiguration of spaces and temporalities of teaching and learning. among the challenges, which at the same time can be considered the horizon, there are identified the following ones: the necessity to listen to the many voices of dissent, among them the silenced ones; b) the effort to transform the educational spaces, the new ones as well as the older ones, in a humanizing ethos; c) to assume the plurality of times as an opportunity the enlarge the vision and to make room in our life world for the diversity of experience.
Da pedagogia do oprimido às pedagogias da exclus?o: um breve balan?o crítico
Streck, Danilo Romeu;
Educa??o & Sociedade , 2009, DOI: 10.1590/S0101-73302009000200012
Abstract: this paper analyzes some shifts in pedagogical practices that correspond to the conceptual changes that have occurred in the last four decades, more precisely since the pedagogy of the oppressed was formulated, at the end of 1960s. it proposes a brief review of social exclusion, especially in terms of its implications for educational practices and policies, relating it to three explicative axes identified as: the pedagogical consensus; the semantic dislocation from oppression to hegemony, and; the critique of modernity and the post modern theories. it is argued that the social exclusion-social inclusion pair is relevant to denounce the multiple forms of inequalities and, as an instrument, to implement social policies. paradoxically, these very aspects constitute its limits when it comes to projecting possibilities to transform the excluding social organization.
José Martí e a educa??o popular: um retorno às fontes
Streck, Danilo R.;
Educa??o e Pesquisa , 2008, DOI: 10.1590/S1517-97022008000100002
Abstract: this article presents josé martí as a historical source of popular education in latin america. it starts from the assumption that there can be no true re-foundation without the return to those founding moments, ideas or principles of popular education. after giving a brief account of martí's work and thought, we characterize the concept of popular education as education of the people, in the sense of a universal education. on a different level, we seek to identify in martí's work elements of popular education as a political-pedagogical movement that takes shape especially since the latter half of the 20th century. the premise here is that at some given point people's education and popular education cease to be equivalent terms, and that in josé martí we find elements to think about these two terms dialectically, in a movement of re-creation of a practice that, albeit cleaved by historical contingencies, is whole. four pillars of popular education are identified in his work: valuing the plurality of knowledges; the interpersonal relationship as the milieu for teaching-learning, and basis of social transformation; the knowledge of reality from an emancipative perspective as a political act; and education as self-formative process of society.
A generalized nonlinear tempeature response function for some growth and developmental parameters in kiwifruit (Actinidia deliciosa (A. Chev.) C. F. Liang & A. R. Ferguson)
Streck, Nereu Augusto;
Ciência Rural , 2003, DOI: 10.1590/S0103-84782003000200012
Abstract: temperature is a major factor that affects metabolic processes in living organisms. thermal time has been widely used to account for the effects of temperature on crop growth and development. however, the thermal time approach has been criticized because it assumes a linear relationship between the rate of crop growth or development and temperature. the response of the rate of crop growth and development to temperature is nonlinear. the objective of this study was to develop a generalized nonlinear temperature response function for some growth and developmental parameters in kiwifruit (actinidia deliciosa (a. chev.) c. f. liang & a. r. ferguson). the nonlinear function has three coefficients (the cardinal temperatures), which were 0oc, 25oc, and 40oc. data of temperature response of relative growth rate, relative leaf area growth, net photosynthesis rate, and leaf appearance rate in kiwifruit (female cv. hayward) at two light levels, which are from published research, were used as independent data for evaluating the performance of the nonlinear and the thermal time functions. the results showed that the generalized nonlinear response function is better than the thermal time approach, and the temperature response of several growth and developmental parameters in kiwifruit can be described with the same response function.
A temperature response function for development of the chrysanthemum (Chrysanthemum x morifolium Ramat.)
Streck, Nereu Augusto;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000100008
Abstract: developmental models can help growers to decide management practices, and to predict flowering and harvest time. currently, a double exponential function is proposed as a generalized temperature response function for chrysanthemum. this function is not the most appropriate because its parameters lack biological meaning. the objective of this study was to develop a nonlinear temperature response function of chrysanthemum development that has parameters with biological meaning. the proposed function is a beta function with three parameters, the cardinal temperatures (minimum, optimum, and maximum temperatures for development), which were defined as 0, 22, and 35oc. published data of temperature response of development of three cultivars, which are independent data sets, were used to test the performance of the double exponential function and the beta function. results showed that the beta function is better than the double exponential function to describe the temperature response of chrysanthemum development.
A temperature response function for modeling leaf growth and development of the African violet (Saintpaulia ionantha Wendl.)
Streck, Nereu Augusto;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000100009
Abstract: response functions used in crop simulation models are usually different for different physiological processes and cultivars, resulting in many unknown coefficients in the response functions. this is the case of african violet (saintpaulia ionantha wendl.), where a generalized temperature response for leaf growth and development has not been developed yet. the objective of this study was to develop a generalized nonlinear temperature response function for leaf appearance rate and leaf elongation rate in african violet. the nonlinear function has three coefficients, which are the cardinal temperatures (minimum, optimum, and maximum temperatures). these coefficients were defined as 10, 24, and 33oc, based on the cardinal temperatures of other tropical species. data of temperature response of leaf appearance rate and leaf elongation rate in african violet, cultivar utah, at different light levels, which are from published research, were used as independent data for evaluating the performance of the nonlinear temperature response function. the results showed that a generalized nonlinear response function can be used to describe the temperature response of leaf growth and development in african violet. these results imply that a reduction in the number of input data required in african violet simulation models is possible.
Climate change and agroecosystems: the effect of elevated atmospheric CO2 and temperature on crop growth, development, and yield
Streck, Nereu Augusto;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000300041
Abstract: the amount of carbon dioxide (co2) of the earth′s atmosphere is increasing, which has the potential of increasing greenhouse effect and air temperature in the future. plants respond to environment co2 and temperature. therefore, climate change may affect agriculture. the purpose of this paper was to review the literature about the impact of a possible increase in atmospheric co2 concentration and temperature on crop growth, development, and yield. increasing co2 concentration increases crop yield once the substrate for photosynthesis and the gradient of co2 concentration between atmosphere and leaf increase. c3 plants will benefit more than c4 plants at elevated co2. however, if global warming will take place, an increase in temperature may offset the benefits of increasing co2 on crop yield.
Do we know how plants sense a drying soil?
Streck, Nereu Augusto;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000200039
Abstract: the reduction of crop growth and yield in dry areas is largely due to stomatal closure in response to dry soil, which decreases photosynthesis. however, the mechanism that causes stomatal closure in a drying soil is a controversial issue. experienced and respected plant physiologists around the world have different views about the primary sensor of soil water shortage in plants. the goal of this review is to present a chronological synthesis about the evidence of the possible candidates for the mechanism by which plants sense a drying soil. hydraulic signals in the leaves as the mechanism that causes stomatal closure dominated the view on how plants sense a drying soil during the 70?s and the early 80?s. in the middle 80?s, studies suggested that stomatal conductance is better correlated with soil and root water status than with leaf water status. thus, chemical signals produced in the roots dominated the view on how plants sense a drying soil during the late 80?s and early 90?s. during the second half of the 90?s, however, studies provided evidence that hydraulic signals in the leaves are still better candidates for the mechanism by which plants sense a drying soil. after more than 60 years of studies in plant-water relations, the question raised in the title still has no unanimous answer. this controversial issue is a good research rationale for the current generation of plant physiologists.
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