El método en dos investigaciones urbanas: Estación plaza de Bolívar e Imaginarios y representaciones en el transporte público de pasajeros

Las primeras investigaciones urbanas se realizaron a partir de la semiótica de las formas y buscaban definir aquellos elementos o significantes que trasmiten el significado de ciudad. Luego, se incorporó la categoría deseo que permitió mirar el sentido de la ciudad más allá de su significado formal, esto es la práctica significante. Dentro de esta línea de investigación, la observación, que acá se presenta, pasó de una mirada estática en el trabajo “Estación Plaza de Bolívar”, a una ciudad en movimiento en el trabajo “Imaginarios y representaciones en el transporte público de pasajeros”. Entre estas dos investigaciones se produjo un cambio metodológico inducido por el movimiento y la necesidad de buscar escenas fragmentarias a lo largo de recorridos. El objetivo de este artículo es confrontar esas metodologías, las hipótesis y las referencias teóricas de ambas investigaciones.AbstractThe first urban investigations were carried out starting from the semiótica in the ways and they looked for to define those elements or significant that transmit the city meaning. Then, he/she incorporated the category desire that allowed to look at the sense of the city beyond their formal meaning, this is the significant practice. Inside this investigation line, the observation that here is presented, it passed of a static look in the work “Station Square of Bolívar”, to a city in movement in the work “Imaginary and representations in the public transportation of passengers.” Among these two investigations a methodological change induced by the movement and the necessity of looking for fragmentary scenes along journeys took place. The objective of this article is to confront those methodologies, the hypotheses and the theoretical references of both investigations.</p

Spin-injection Hall effect in a planar photovoltaic cell

Successful incorporation of the spin degree of freedom in semiconductor technology requires the development of a new paradigm allowing for a scalable, non-destructive electrical detection of the spin-polarization of injected charge carriers as they propagate along the semiconducting channel. In this paper we report the observation of a spin-injection Hall effect (SIHE) which exploits the quantum-relativistic nature of spin-charge transport and which meets all these key requirements on the spin detection. The two-dimensional electron-hole gas photo-voltaic cell we designed to observe the SIHE allows us to develop a quantitative microscopic theory of the phenomenon and to demonstrate its direct application in optoelectronics. We report an experimental realization of a non-magnetic spin-photovoltaic effect via the SIHE, rendering our device an electrical polarimeter which directly converts the degree of circular polarization of light to a voltage signal.Comment: 14 pages, 4 figure

El método en dos investigaciones urbanas : estación plaza de Bolívar e Imaginarios y representaciones en el transporte público de pasajeros.

The first urban investigations were carried out starting from the semiótica in the ways and they looked for to define those elements or significant that transmit the city meaning. Then, he/she incorporated the category desire that allowed to look at the sense of the city beyond their formal meaning, this is the significant practice. Inside this investigation line, the observation that here is presented, it passed of a static look in the work “Station Square of Bolívar”, to a city in movement in the work “Imaginary and representations in the public transportation of passengers.” Among these two investigations a methodological change induced by the movement and the necessity of looking for fragmentary scenes along journeys took place. The objective of this article is to confront those methodologies, the hypotheses and the theoretical references of both investigations.Las primeras investigaciones urbanas se realizaron a partir de la semiótica de las formas y buscaban definir aquellos elementos o significantes que trasmiten el significado de ciudad. Luego, se incorporó la categoría deseo que permitió mirar el sentido de la ciudad más allá de su significado formal, esto es la práctica significante. Dentro de esta línea de investigación, la observación, que acá se presenta, pasó de una mirada estática en el trabajo “Estación Plaza de Bolívar”, a una ciudad en movimiento en el trabajo “Imaginarios y representaciones en el transporte público de pasajeros”. Entre estas dos investigaciones se produjo un cambio metodológico inducido por el movimiento y la necesidad de buscar escenas fragmentarias a lo largo de recorridos. El objetivo de este artículo es confrontar esas metodologías, las hipótesis y las referencias teóricas de ambas investigaciones

The method in two urban investigations : square of Bolívar station and imaginary and representations in the public transportation of passengers.

Las primeras investigaciones urbanas se realizaron a partir de la semiótica de las formas y buscaban definir aquellos elementos o significantes que trasmiten el significado de ciudad. Luego, se incorporó la categoría deseo que permitió mirar el sentido de la ciudad más allá de su significado formal, esto es la práctica significante. Dentro de esta línea de investigación, la observación, que acá se presenta, pasó de una mirada estática en el trabajo “Estación Plaza de Bolívar”, a una ciudad en movimiento en el trabajo “Imaginarios y representaciones en el transporte público de pasajeros”. Entre estas dos investigaciones se produjo un cambio metodológico inducido por el movimiento y la necesidad de buscar escenas fragmentarias a lo largo de recorridos. El objetivo de este artículo es confrontar esas metodologías, las hipótesis y las referencias teóricas de ambas investigaciones.The first urban investigations were carried out starting from the semiótica in the ways and they looked for to define those elements or significant that transmit the city meaning. Then, he/she incorporated the category desire that allowed to look at the sense of the city beyond their formal meaning, this is the significant practice. Inside this investigation line, the observation that here is presented, it passed of a static look in the work “Station Square of Bolívar”, to a city in movement in the work “Imaginary and representations in the public transportation of passengers.” Among these two investigations a methodological change induced by the movement and the necessity of looking for fragmentary scenes along journeys took place. The objective of this article is to confront those methodologies, the hypotheses and the theoretical references of both investigations

Paisaje Cultural Urbano e Identitad Territorial

Linguaggio contemporaneo e preesistenze: dialogo in un mondo globalizzato Il tema del rapporto con l’antico trova una giusta dimensione operativa quando, superando la sfera delle ideologie e quella delle opposte ragioni della memoria e dello sviluppo, indirizza positivamente l’azione progettuale ora per differenza ora per empatia, a seconda delle circostanze, ma crea sempre una forte tensione tra le ragioni dell’esistente e le necessità del nuovo. Intervenire nell’antico e per l’antico significa, pertanto, riprogettare il nostro modo di relazionarci con il passato, rinegoziandone identità e valori alla luce del nostro presente. Da questa angolazione il patrimonio non è solo lo spazio della memoria o quello della storia, ma diviene lo spazio del desiderio che trae alimento dal mito dell’araba fenice: esso, come principio evolutivo, rappresenta l’inizio di un incessante ricominciamento e l'occasione per una mediazione tra globale e locale

NEOTROPICAL CARNIVORES: a data set on carnivore distribution in the Neotropics

Mammalian carnivores are considered a key group in maintaining ecological health and can indicate potential ecological integrity in landscapes where they occur. Carnivores also hold high conservation value and their habitat requirements can guide management and conservation plans. The order Carnivora has 84 species from 8 families in the Neotropical region: Canidae; Felidae; Mephitidae; Mustelidae; Otariidae; Phocidae; Procyonidae; and Ursidae. Herein, we include published and unpublished data on native terrestrial Neotropical carnivores (Canidae; Felidae; Mephitidae; Mustelidae; Procyonidae; and Ursidae). NEOTROPICAL CARNIVORES is a publicly available data set that includes 99,605 data entries from 35,511 unique georeferenced coordinates. Detection/non-detection and quantitative data were obtained from 1818 to 2018 by researchers, governmental agencies, non-governmental organizations, and private consultants. Data were collected using several methods including camera trapping, museum collections, roadkill, line transect, and opportunistic records. Literature (peer-reviewed and grey literature) from Portuguese, Spanish and English were incorporated in this compilation. Most of the data set consists of detection data entries (n = 79,343; 79.7%) but also includes non-detection data (n = 20,262; 20.3%). Of those, 43.3% also include count data (n = 43,151). The information available in NEOTROPICAL CARNIVORES will contribute to macroecological, ecological, and conservation questions in multiple spatio-temporal perspectives. As carnivores play key roles in trophic interactions, a better understanding of their distribution and habitat requirements are essential to establish conservation management plans and safeguard the future ecological health of Neotropical ecosystems. Our data paper, combined with other large-scale data sets, has great potential to clarify species distribution and related ecological processes within the Neotropics. There are no copyright restrictions and no restriction for using data from this data paper, as long as the data paper is cited as the source of the information used. We also request that users inform us of how they intend to use the data

NEOTROPICAL ALIEN MAMMALS: a data set of occurrence and abundance of alien mammals in the Neotropics

Biological invasion is one of the main threats to native biodiversity. For a species to become invasive, it must be voluntarily or involuntarily introduced by humans into a nonnative habitat. Mammals were among first taxa to be introduced worldwide for game, meat, and labor, yet the number of species introduced in the Neotropics remains unknown. In this data set, we make available occurrence and abundance data on mammal species that (1) transposed a geographical barrier and (2) were voluntarily or involuntarily introduced by humans into the Neotropics. Our data set is composed of 73,738 historical and current georeferenced records on alien mammal species of which around 96% correspond to occurrence data on 77 species belonging to eight orders and 26 families. Data cover 26 continental countries in the Neotropics, ranging from Mexico and its frontier regions (southern Florida and coastal-central Florida in the southeast United States) to Argentina, Paraguay, Chile, and Uruguay, and the 13 countries of Caribbean islands. Our data set also includes neotropical species (e.g., Callithrix sp., Myocastor coypus, Nasua nasua) considered alien in particular areas of Neotropics. The most numerous species in terms of records are from Bos sp. (n = 37,782), Sus scrofa (n = 6,730), and Canis familiaris (n = 10,084); 17 species were represented by only one record (e.g., Syncerus caffer, Cervus timorensis, Cervus unicolor, Canis latrans). Primates have the highest number of species in the data set (n = 20 species), partly because of uncertainties regarding taxonomic identification of the genera Callithrix, which includes the species Callithrix aurita, Callithrix flaviceps, Callithrix geoffroyi, Callithrix jacchus, Callithrix kuhlii, Callithrix penicillata, and their hybrids. This unique data set will be a valuable source of information on invasion risk assessments, biodiversity redistribution and conservation-related research. There are no copyright restrictions. Please cite this data paper when using the data in publications. We also request that researchers and teachers inform us on how they are using the data