49,835 research outputs found
Scale insects (Hemiptera: Coccoidea) of ornamental plants from Sao Carlos, Sao Paulo, Brazil
A list of 35 scale insects collected from 72 ornamental plant species in Sao Carlos, Sao Paulo, Brazil is provided. Regarding host specificity, 30 scale insects were polyphagous, 4 oligophagous, and 1 monophagous. A total of 102 coccoid/plant associations are recorded, 29 of which are new host records for the species; 60 are new host records for the species in Brazil. Pulvinaria urbicola Cockerell, 1893 (Coccidae), Phenacoccus similis Granara de Willink, 1983 (Pseudococcidae), and Orthezia molinarii (Morrison, 1952) (Ortheziidae) are recorded for the first time in Brazil. In addition, we describe the injury caused by scale insects on ornamental plants
Semi-Automated SVG Programming via Direct Manipulation
Direct manipulation interfaces provide intuitive and interactive features to
a broad range of users, but they often exhibit two limitations: the built-in
features cannot possibly cover all use cases, and the internal representation
of the content is not readily exposed. We believe that if direct manipulation
interfaces were to (a) use general-purpose programs as the representation
format, and (b) expose those programs to the user, then experts could customize
these systems in powerful new ways and non-experts could enjoy some of the
benefits of programmable systems.
In recent work, we presented a prototype SVG editor called Sketch-n-Sketch
that offered a step towards this vision. In that system, the user wrote a
program in a general-purpose lambda-calculus to generate a graphic design and
could then directly manipulate the output to indirectly change design
parameters (i.e. constant literals) in the program in real-time during the
manipulation. Unfortunately, the burden of programming the desired
relationships rested entirely on the user.
In this paper, we design and implement new features for Sketch-n-Sketch that
assist in the programming process itself. Like typical direct manipulation
systems, our extended Sketch-n-Sketch now provides GUI-based tools for drawing
shapes, relating shapes to each other, and grouping shapes together. Unlike
typical systems, however, each tool carries out the user's intention by
transforming their general-purpose program. This novel, semi-automated
programming workflow allows the user to rapidly create high-level, reusable
abstractions in the program while at the same time retaining direct
manipulation capabilities. In future work, our approach may be extended with
more graphic design features or realized for other application domains.Comment: In 29th ACM User Interface Software and Technology Symposium (UIST
2016
ERIC-PCR diferencia guaranazeiro cultivado de espécies afins (Paullinia spp).
O objetivo deste trabalho foi analisar o potencial dos primers ERIC-PCR para identificação da variação intra e interespecífica
Indução de resistência e promoção de crescimento em plantas de arroz tratadas com silício e bioagentes.
Os bioagentes são conhecidos pela eficácia em induzir a defesa e promover crescimento das plantas, e o silício por suprimir doenças ao reforçar as barreiras físicas. O efeito supressor e promotor da combinação entre adubação silicatada e bioindutores foi investigado no patossitema arroz/Magnaporthe oryzae, avaliando-se as concentrações 0, 1, 2, 4 e 8 ton.ha-1 de silicato de cálcio e magnésio e o modo de aplicação dos bioagentes Rizo-46, Rizo-55 e Trichoderma sp
Mineralização do fósforo nos estercos caprino e bovino em função da profundidade de incorporação sob irrigação por micro aspersão.
Este trabalho foi desenvolvido no campo experimental do CEFET Petrolina com o objetivo de verificar a mineralização de fósforo em dois estercos (caprino e bovino), quando incorporados a diferentes profundidades, ao longo do tempo, sob irrigação por micro aspersão. Cada unidade experimental foi constituída de 20 g de esterco seco a estufa a 65oC, por 48 horas, acondicionadas em sacolas de náilon que foram incorporadas ao solo obedecendo à profundidade e o tempo dos respectivos tratamentos. Ao término de cada tratamento as sacolas de náilon foram coletadas, o esterco foi recolhido, com auxílio de um pincel de cerdas flexíveis, e secos em estufa à 65oC, por 48 horas, seguindo-se da determinação do teor de fósforo pelo método do Amarelo de Vanadato. Verificou-se uma maior mineralização de P no esterco caprino que no bovino. Neste, o P mineralizado variou com a profundidade de incorporação sendo mais intensa nas camadas de 0 - 10 e de 10 - 20 cm. A mineralização de P aumentou com o tempo de incorporação nos dois estercos estudados
Taxa de composição de estercos em função do tempo e da profundidade de incorporação sob irrigação por micro aspersão.
Este trabalho teve como objetivo determinar a taxa de decomposição de estercos bovino e caprino, quando incorporados a diferentes profundidades, ao longo do tempo, sob irrigação por microaspersão. O trabalho foi realizado na área de uva de mesa, no Campo Experimental da Unidade Agrícola do CEFET - Petrolina, situada na BR 235, km 22, Zona Rural da cidade de Petrolina. Antes da instalação do experimento o solo foi amostrado a diferentes profundidades (0-10, 10-20, 20-30 e 30-40 cm) e caracterizado quimicamente
Heavy-ion Physics at a Fixed-Target Experiment Using the LHC Proton and Lead Beams (AFTER@LHC): Feasibility Studies for Quarkonium and Drell-Yan Production
We outline the case for heavy-ion-physics studies using the multi-TeV lead
LHC beams in the fixed-target mode. After a brief contextual reminder, we
detail the possible contributions of AFTER@LHC to heavy-ion physics with a
specific emphasis on quarkonia. We then present performance simulations for a
selection of observables. These show that , and
production in heavy-ion collisions can be studied in new energy and
rapidity domains with the LHCb and ALICE detectors. We also discuss the
relevance to analyse the Drell-Yan pair production in asymmetric
nucleus-nucleus collisions to study the factorisation of the nuclear
modification of partonic densities and of further quarkonia to restore their
status of golden probes of the quark-gluon plasma formation.Comment: 18 pages, 7 figure
The age of data-driven proteomics : how machine learning enables novel workflows
A lot of energy in the field of proteomics is dedicated to the application of challenging experimental workflows, which include metaproteomics, proteogenomics, data independent acquisition (DIA), non-specific proteolysis, immunopeptidomics, and open modification searches. These workflows are all challenging because of ambiguity in the identification stage; they either expand the search space and thus increase the ambiguity of identifications, or, in the case of DIA, they generate data that is inherently more ambiguous. In this context, machine learning-based predictive models are now generating considerable excitement in the field of proteomics because these predictive models hold great potential to drastically reduce the ambiguity in the identification process of the above-mentioned workflows. Indeed, the field has already produced classical machine learning and deep learning models to predict almost every aspect of a liquid chromatography-mass spectrometry (LC-MS) experiment. Yet despite all the excitement, thorough integration of predictive models in these challenging LC-MS workflows is still limited, and further improvements to the modeling and validation procedures can still be made. In this viewpoint we therefore point out highly promising recent machine learning developments in proteomics, alongside some of the remaining challenges
- …