90,106 research outputs found
Research topics in crop diversification at the landscape level
No full textCrop diversification has many benefits both at the cropping system and the food system levels and has
been addressed in agricultural research (Hufnagel et al., 2020). Landscape design and management in
agricultural regions can support crop diversification by building bridges with scientific domains like
ecology and geography (Benoit et al., 2012). Though, little is known on how the research community has
addressed crop diversification from a landscape perspective. In this paper we investigated a
bibliographic corpus retrieved from the Scopus database papers coupling crop diversification and
landscape (in title, abstract and keywords), retrieving 461 papers for the period 1990 to 2020. The
corpus was analysed using the CorText platform (e.g., Ruiz-Martinez et al., 2015). First, natural language
processing was used to extract multi-terms from title, abstract and keywords. Then, we mined the
temporal dynamics and co-occurrence of the 100 most frequent terms. Our findings showed that
species richness emerges as the main topic in this corpus and that natural enemies, crop types and
natural control increased in importance. In the last years, genetic diversity, climate change and
agricultural production also gained attention. On the contrary, land use and some of the terms related
to diversity (landscape, plant and farmland) were marginal or decreasing. By analysing the terms cooccurrence on the three decades, we observed that the papers addressing crop varieties and
agroforestry system split into two streams: one about agricultural production in relation to climate
change and the other about farm size and land use. Instead, the functional diversity and field margin
disappeared from recent literature. Land use patterns and landscape diversity converged mainly on
studies about biological pest control. Altogether, the corpus highlighted that the spatial configuration
lost importance when addressing crop diversification. In addition, the species diversity gained attention
finally catching a large part of the literature in the corpus. From a landscape approach perspective, we
might point out the apparent lack of a major topic: the involvement of local communities and
stakeholders. Our simple and rapid text mining approach yielded early evidence of knowledge gaps
about the landscape level in crop diversification literature. The expected contribution of approaching
the crop diversification at the landscape level would be to provide a relevant framework for the
characterisation of the baseline system to be diversified. In particular, the landscape agronomy
perspective stressed the need to define the scale and target area for crop diversification consistently
with (natural and cultivated) species diversity embedded in a local socio-technical system
Frames im WTO-Diskus. Ergebnisse einer Akteurbefragung bei den WTO-Ministerkonferenzen in Cancún und Hong Kong [Frames in the WTO Discourse. Findings from interviews with policy actors at the WTO Ministerial Conferences at Cancún and Hong Kong]
No full textVariations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
[Newspaper Clipping: Author Claims Evidence of Second JFK Assassin #1]
No full textNewspaper article titled "Author Claims Evidence of Second JFK Assassin." The article states that author Richard J. Whalen concluded "that there is circumstantial evidence to support the theory of a second assassin in the shooting of President John F. Kennedy.
Probleme und Herausforderungen der Landwirtschaft aus Sicht agrarpolitischer Akteure in Deutschland: Themen und Paradigmen [Problems and challenges for agriculture in the perception of agricultural policy-makers in Germany: issues and paradigms]
No full textSozial-ökologische Entwicklungsprobleme von Landwirtschaft und Agrarpolitik: Eine Annäherung [Social-ecological development problems of agriculture and agricultural policy]
No full textNachhaltigkeit, Reflexivität und Verständigungsaufgaben: Konzeptionelle Ausgangsüberlegungen [Sustainability, reflexivity and tasks of understanding: conceptional considerations]
No full textAlso By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
John F. Kennedy telegram to Roosevelt
No full textJersey Homesteads (later the Borough of Roosevelt) was established in the 1930s as an agro-industrial cooperative community. It was established specifically for urban Jewish garment workers, many of whom had emigrated from Europe. President John F. Kennedy sent a telegram to the citizens of Roosevelt, New Jersey, apologizing for not being able to attend the memorial dedication in honor of former President Franklin Delano Roosevelt. (Jersey Homesteads became Roosevelt in 1945 in honor of the president.) President Kennedy expressed his gratitude to the people of Roosevelt for constructing the memorial, and commented that it will serve as a constant reminder of Roosevelt's good works
Logarithmic variance profiles and the corresponding f-1 spectra of temperature fluctuations in turbulent Rayleigh-Bénard convection
No full textWe report experimental results for the temperature variance 2(z) and the corresponding frequency spectra P(f) in turbulent Rayleigh-Bénard convection (RBC) in a cylindrical sample of aspect ratioT= D/L = 1:00 (D = 1:12 m is the diameter and L = 1:12 m the height). The measurements were conducted in the Rayleigh-number range 1011 < Ra < 1:35 1014 and Pr ' 0:8. For Ra = 1:35x1014, 2(z) could be described well by a logarithmic dependence on the vertical position z in a range of z 1 < z < z 2 with z 1 ' 70 and z 2 = 0:1L. Here L=(2Nu) is the thickness of a thin thermal sublayer adjacent to the horizontal plate where the heat flux (denoted by the Nusselt number Nu) is carried mostly by thermal diffusion. In the log layer, we found that the temperature spectra had a significant frequency range over which P(f) f with close to 1. As Ra decreased, increased so that the log layer became thinner. At Ra = 2:05 1011, z 2 < z 1 and therefore there was no range for a log layer. Correspondingly, the temperature spectrum near the horizontal plate did not have the f1 scaling form either
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