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Search Results: 1 - 10 of 36068 matches for " Leonardo;Santos "
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Electron-Domain Wall Interaction with a Ferromagnetic Spherical Domain Wall  [PDF]
Leonardo dos Santos Lima
Journal of Modern Physics (JMP) , 2016, DOI: 10.4236/jmp.2016.713148
Abstract: The interaction between an electron with a three-dimensional domain wall was investigated using the Born’s expansion of the S scattering matrix. We obtain an influence of the scattering of the electron with the ferromagnetic domain wall in the spin wave function of the electron with the aim to generate the knowledge about the state of the electron spin after the scattering. It relates to the recent problem of generation of the spin polarized electric current. We also obtain the contribution of the electron-wall domain interaction on the electric conductivity \"\", through the wall domain, where we have obtained a peak of resonance in the conductivity for one value of \"\" .
Os valores de uma luta: A economia moral do movimento pela terra dos pequenos lavradores do Sert?o Carioca nos difíceis anos de 1945-1964
Soares dos Santos,Leonardo;
Mundo agrario , 2006,
Abstract: this article attempts to discuss on concept of moral economy, presenting the case of "pequenos lavradores" (quatters) in rio de janeiro' landscape between 1945-1964. in the first place, the focus falls on the discussion of anthropologists as klaas and ellen woortman about that concept. in the second, i make a verification one of how moral economy one has been expressed by "pequenos lavradores" in you fight for the land. my hypothesis is that moral economy one not is only a set of values, but it play too an important rule in the establishment of a political speech one and of your social identity. the sources explored are newspapers, peasant meeting documents and letters envoy to the president getúlio vargas.
What do we know about reaction mechanism? the electrospray ionization mass spectrometry approach
Santos, Leonardo S.;
Journal of the Brazilian Chemical Society , 2011, DOI: 10.1590/S0103-50532011001000002
Abstract: man's fascination with chemical reactions goes back to ancient times. with the introduction of spectroscopic techniques, the art of exploiting reactions became an intriguing science. it is, therefore, not surprising that one of the most flourishing and rewarding frontiers in modern chemistry is the study of reaction mechanisms in chemical and biological processes. as man's imagination does not stop at the frontiers defined by nature, and with the ever increasing power of catalysis, the synthetic organic chemist is poised to make important contributions by inventing and developing new enabling technologies for the generation of new catalysts and methodologies. in this account is offered a new tool for accelerating the development through electrospray ionization-mass spectrometric (esi-ms) monitoring in new reaction discovering.
Trilhas da política ambiental: conflitos, agendas e cria??o de unidades de conserva??o
Santos, Leonardo Bis dos;
Ambiente & Sociedade , 2009, DOI: 10.1590/S1414-753X2009000100010
Abstract: the creation of protected areas is one of the most recurrent environmental politics worldwide. the protection of an area, however, involves different levels of conflict due to the appropriation of environmental resources. this paper analyzes the category of conflicts as a theoretical tool to apprehend the composition of the social agenda. it presents a new perspective of social battles.
Da árvore ao rizoma: apontamentos para a educa o ambiental na alta modernidade
Leonardo Bis dos Santos
Vértices , 2010,
Abstract: A concep o de ciência inaugurada com o Iluminismo é marcada pela cis o em diversas esferas. A especializa o dos saberes e a separa o entre pesquisador e objeto e entre Homem e Natureza s o a materializa o do projeto positivista. Este panorama é metaforicamente representado pela árvore, com seus galhos estanques. O colapso desta retórica e a emergência da quest o ambiental na alta modernidade sinalizam para um cenário onde os saberes se inter-relacionam. O rizoma com suas teias e interconex es representam esta nova paisagem científica que se desenha. Este trabalho se deteve em interpretar esta fase tendo em perspectiva a educa o ambiental. From the tree to rhizome: notes for environmental education in high modernity The concept of Science, originated in the Enlightenment, is marked by a rupture in different spheres. The specialization of the different areas of knowledge and the distance between researcher and his/her object of investigation and between Man and Nature are both materializations of the Positivist project. This is metaphorically represented by a tree and its still branches. The breakdown of this rhetoric, and the emergency of the environmental issue in late modernity point to a scenario where all types of knowledge are interrelated. The rhizome with its webs and interconnections represent this new scientific landscape. Aiming at an environmental educational program, this study has focused on the interpretation of this period.
Os valores de uma luta: A economia moral do movimento pela terra dos pequenos lavradores do Sert o Carioca nos difíceis anos de 1945-1964
Leonardo Soares dos Santos
Mundo agrario , 2006,
Abstract: This article attempts to discuss on concept of moral economy, presenting the case of "pequenos lavradores" (quatters) in Rio de Janeiro' landscape between 1945-1964. In the first place, the focus falls on the discussion of anthropologists as Klaas and Ellen Woortman about that concept. In the second, I make a verification one of how moral economy one has been expressed by "pequenos lavradores" in you fight for the land. My hypothesis is that moral economy one not is only a set of values, but it play too an important rule in the establishment of a political speech one and of your social identity. The sources explored are newspapers, peasant meeting documents and letters envoy to the President Getúlio Vargas. Este artigo tenta discutir sobre o conceito de economia moral, apresentando o caso dos pequenos lavradores na zona rural do Rio de Janeiro entre os anos de 1945-1964. Em primeiro lugar, o foco recai sobre a discuss o de antropólogos como Klaas e Ellen Woortman sobre aquele conceito. Em segundo, eu realizo uma verifica o de como uma economia moral foi expressa por "pequenos lavradores" em suas lutas pela terra. Minha hipótese é que a economia moral n o é apenas um conjunto de valores, mas possui também um importante papel no estabelecimento de um discurso político e de uma identidade social. As fontes por mim exploradas foram jornais, documentos de encontros camponeses e cartas enviadas ao presidente Getúlio Vargas.
Do que “os Livros Diziam” à Rua da Glória, n. 52: o PCB e a “quest o camponesa” (1927-1947)
Leonardo Soares dos Santos
Revista IDeAS : Interfaces em Desenvolvimento, Agricultura e Sociedade , 2009,
Abstract: This article treat the formation of ““Peasantry Question” in the Communist Party of Brazil during 20 and 40’s. By this study is possible to perceive how ideas on men and situations of Brazilian hinterland to give place to Peasantry Leagues and formation of several formers strictly pointed towards to action in the country.
O ECOTURISMO HOJE
Leonardo Santos Guimar?es
Revista PRETEXTO , 2001,
Abstract:
A paisagem e o geossistema como possibilidade de leitura da express o do espa o sócio-ambiental rural
Dias Janise,Santos Leonardo
Confins , 2007, DOI: 10.4000/confins.10
Abstract: A Geografia como ciência de caráter eminentemente ambientalista permite no estudo da rela o entre os homens e o meio natural a análise da expans o dos sítios urbanos e rurais, instala o de núcleos de coloniza o, implanta o de sistemas produtivos tecnificados e suas inter-rela es com os demais componentes do estrato geográfico. Desde o sucesso da Teoria Geral dos Sistemas, de Bertanlanffy, no início dos anos 1950 do século XX, a análise sistêmica extravasara todas as disciplinas. O trabal...
Fenologia de Cedrela fissilis Vell. (Meliaceae) na regi?o rural de Itirapina, SP, Brasil
Santos, Débora Leonardo dos;Takaki, Massanori;
Acta Botanica Brasilica , 2005, DOI: 10.1590/S0102-33062005000300024
Abstract: the study of phenology of leaf fall, flushing, flowering and fruiting was carried at from september /1999 to november/2001. ten trees were systematically observed every at 14 days intervals. leaf fall ocurred at the dry season and flushing and flowering at the beginning of rain season. the fruiting period was long, and dispertion at the end of dry season. flowering and fruiting not showed an annual cycle, years which massive flowers and fruits was followed by non productive year.
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