Search results for " Er"
showing 10 items of 4279 documents
SAMSLAM: Simulated Annealing Monocular SLAM
2013
This paper proposes a novel monocular SLAM approach. For a triplet of successive keyframes, the approach inteleaves the registration of the three 3D maps associated to each image pair in the triplet and the refinement of the corresponding poses, by progressively limiting the allowable reprojection error according to a simulated annealing scheme. This approach computes only local overlapping maps of almost constant size, thus avoiding problems of 3D map growth. It does not require global optimization, loop closure and back-correction of the poses.
Polyester microplastic fibers affect soil physical properties and erosion as a function of soil type
2021
Microplastics are recognized as a factor of global change contaminating many environmental compartments. Agricultural soils are very likely to receive microplastic contamination and are of particular concern due to their role in food production. Microplastic fibers have already been shown to be able to affect soil properties, but their effect on different soil types is poorly understood. Moreover, limited information is available on how the presence of this pollutant can affect soil water erosion processes, which are extremely important issues in many environments. In the light of this, we performed two experiments (carried out on a microscale) to investigate how the presence of polyester m…
Microplastic incorporation into soil in agroecosystems
2017
Background: We live in a plastic age (Thompson et al., 2009), with microplastic (typically defined as plastic particles < 5 mm) becoming an increasingly appreciated aspect of environmental pollution. Research has been overwhelmingly focused on aquatic systems, especially the oceans, but there is a current shift to more strongly consider terrestrial ecosystems (Rillig, 2012; Horton et al., 2017). In particular agroecosystems are coming into focus as a major entry point for microplastics in continental systems (Nizzetto et al., 2016b), where contamination might occur via different sources as sludge amendment or plastic mulching (Steinmetz et al., 2016). Given the central role of agroecosystem…
Economists and Eugenics: Progressive Era Racism and its (Jewish) Discontents
2017
This chapter analyzes the contribution to the debates on labor and immigration of a group of Jewish academicians and reformers who, during the second half of the Progressive Era, explicitly took a stance against the racialist and eugenic rhetoric of the period. This group includes first-rank economists like Edwin R. A. Seligman, Jacob H. Hollander, and Emanuel A. Goldenweiser; influential field specialists such as Isaac A. Hourwich and Isaac M. Rubinow; and relatively less known figures like Max J. Kohler and Samuel K. Joseph. By focusing on the voices of these dissenters, this chapter enriches the emerging picture of Progressive Era eugenic and racial thought.
El coneixement erotètic és reductible al coneixement proposicional?
2012
Defense que cal posar el focus en el coneixement erotètic i no en el pro- posicional és perquè là perspectiva contrària, que ha estat la tradicional, té com a conseqüència que es puguen produir diagnòstics erronis sobre la creença d'un subjecte, la qual cosa fa, alhora, que siga dificil explicaria seua conducta basada en la creença. Si ens fixem en el coneixement proposicional i si identifiquem el fet de creure d'una proposició que és vertadera amb el fet de creure aquesta pro- posició (amb el fet que aquesta proposició siga el contingut de la seua creença), aleshores tindrem com a resultat que dos subjectes que creuen d'una mateixa pro- posició que és ve1iadera, tenen una…
Las antiquísimas rocas del Barranco de Alcotas
2003
Descripción del afloramiento de la Era primaria en el Barranco de Alcotas en Chelva y sus implicaciones socioeconómicas.
Leonīda Keirāna vēstule Ernestam Foldātam
1998
Latviešu dabaszinātnieka Leonīda Keirāna vēstule latviešu orhideju pētniekam Ernestam Foldātam, kurā viņš raksta par to, ka Daugavpils Pedagoģiskās universitātes Dabaszinātņu un matemātikas fakultātes Bioloģijas un mācīšanas metodikas katedrā 1998. gada 12. jūnijā Olga Dubrovska aizstāvēja un ieguva bakalaura grādu pedagoģijas nozarē bioloģijas mācīšanas metodikas apakšnozarē ar ļoti augstu vērtējumu par tematu "Prof. Ernesto Foldāts - latvietis, izcils Dienvidamerikas tropu floras pētnieks". Vēstulē pieminēti izmantotie informācijas avoti, cits absolvents Andrejs Balabkins, kura darbā izmantotas Ernesta Foldāta lekcijas, neliela informācija par pašu Leonīdu Keirānu. Vēstule rokrakstā uz 2 …
Efectos del alcohol y conducción de vehículos: creencias y conductas de los jóvenes
2002
Los accidentes de tráfico son una de las principales causas de mortalidad entre I y 45 años (Generalitat de Catalunya, 1992 ; Montoro, et al., 1995). Numerosos estudios constatan que la siniestralidad viaria está relacionada con el consumo de alcohol (Montoro, 1997). Este problema es especialmente importante en la población joven y se incrementa durante las madrugadas de los fines de semana (Pedragosa,1995; Summala y Mikkola, 1994). Algunos estudios ponen de manifiesto la falta de información y/o conocimientos de muchos jóvenes sobre la normativa vigente que regula el consumo de alcohol de los conductores, así como de los efectos de esta droga sobre el consu¬midor (Reppetto y Senra, 1997; T…
Planting Date and Different N-Fertilization Rates Differently Modulate Agronomic and Economic Traits of a Sicilian Onion Landrace and of a Commercial…
2022
The onion is one of the most widespread bulb vegetables worldwide. Onion cultivation is common in Sicily, as is the use of local genotypes. Cultivation practices are of particular interest in optimizing yield, quality, and profits. The aim of this study was to assess the agronomic response of a Sicilian landrace (Bianca Calda di Comiso, coded L1) and a commercial variety (Bianca di Maggio, coded V1) to different planting dates and N fertilization rates. An economic appraisal was also performed. The two genotypes were assessed using an experimental split-split-plot design with four levels of nitrogen rates (0, 80, 160, and 220 kg N ha−1) and two different planting dates (8 October 2005…