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Search Results: 1 - 10 of 403108 matches for " R. C.;Castro "
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Least Action Trajectory in Neural Networks  [PDF]
Ellison C. Castro, Bhazel Anne R. Pelicano
Open Journal of Applied Sciences (OJAppS) , 2013, DOI: 10.4236/ojapps.2013.33B002
Abstract:

The study of complex networks had developed over the years to include systems such as traffic, predator-prey interactions, financial market, and even the world wide web. Complex network studies encompass biology, chemistry, physics, and even engineering and economics [1-6]. However, the dynamics of such complex networks are yet to be understood fully [7,8]. In this paper, we will be focusing mostly on the possible learning ability in a complex network. To do this, an optimization process is used via Wiener process [9,10]. It is apparent from the sample lattice shown that the final position was not a basis of the transition probability, or it was never used to calculate the probability, since the transition probability only considers the current position. The final point is reached because of the orientation of the edges, where each edge is facing the final point, an aspect of the nervous system (afferent and efferent nerves) [11-13]. No matter how random the orientation of the neurons is, each directs to the central nervous system for processing and is transmitted away for reaction.

Análise de crescimento do amendoinzeiro (Arachis hypogaea L.) com rela??o à infesta??o de pragas
Castro, Paulo R. C.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1974, DOI: 10.1590/S0071-12761974000100014
Abstract: the peanut culture is one of the most important of our country. however it is studied with very little intensity. the thrips enneothrips flavens moulton, 1941, the leaf beetle diabrotica speciosa (germar, 1824) and the red necked peanut worm stegasta bosquella (chambers, 1875), are insect pests often found in peanuts (arachis hypogaea l.), in jaboticabal, state of s?o paulo, brazil. the main proposal of this work is to study the variation of leaf area index, leaf area ratio, net assimilation rate and relative growth rate in an experiment in which one of the treatments consisted in the application of methyl parathion at 0,09% (e.c. 60%) and the other was a check in which no pesticide was applied. the results obtained during the plant life cycle were confronted. the increments of leaf area index and leaf area ratio were observed to be similar for both treatments, but both parameters were found to be practically always smaller for the check treatment. finally, it was shown that the net assimilation rate and the relative growth rate was almost always slightly superior in the plot that received no treatment.
A??o de fitoreguladores nos teores de macronutrientes em tomateiro (Lycopersicon esculentum Mill.)
Castro, Paulo R. C.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1978, DOI: 10.1590/S0071-12761978000100001
Abstract: this research deals with the effects of exogenous growth regulators on mineral nutrition of the tomato plant (lycopersicon esculentum mill, cv. 'miguel pereira'). to study the influence on mineral nutrition, (2-chloroethyl) trimethilammonium chloride (ccc), at concentration of 2,000 ppm, succinic acid-2,2-dimethylhydrazide (sadh) (4,000 ppm), gibberellic acid (ga) (100 ppm), (2-chloroethyl) phosphonic acid (cepa) (200 ppm), indole-3-acetic acid (iaa) (100 ppm), and 6-furfurylamino purine (fap) (500 ppm) were applied. higher levels of nitrogen, calcium and magnesium occurred in the stem of plants sprayed with ccc. treatments with fap. sadh and cepa demonstrated an increase in nitrogen levels in the stem. cepa also increased calcium contents in stems. growth regulators used did not alter the levels of macronutrients in leaves of tomatoes in relation to check plants.
Estudo comparativo da produtividade de cinco cultivares de soja (Glycine max(L.) Merrill)
Castro, Paulo R.C.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1981, DOI: 10.1590/S0071-12761981000100026
Abstract: under greenhouse conditions cultivars davis, iac 73-228, pi 227.687, pi 171.451, and pi 229.358 of soybean were compared. pi 171.451 showed lower dry weight of stem in relation to davis. higher pod numbers produced by pi 227-687, iac 73-228, and pi 229. 358 as compared to davis were observed. cultivars pi 227.687 and iac 73-228 produced larger seed numbers. a larger weight of 100 seeds in davis, pi 229.358, and pi 171. 45i cultivars was observed. the last two cultivars are sources of resistance against pests of soybean.
A??o de fitoreguladores no potencial osmótico da soja (Glycine max cv. Davis)
Castro, Paulo R.C.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1980, DOI: 10.1590/S0071-12761980000200016
Abstract: this research deals with the effects of exogenous growth regulators on leaf osmotic potential of 'davis' soybean. to study the influence of growth substances on osmotic potential (2-chloroethyl) trimethylammonium chloride (ccc) at concentration of 2,000 ppm, succinic acid-2,2-dimethylhydra-zide (sadh) 4,000 ppm, gibberellic acid (ga) 100 ppm, and indolylacetic acid acid (iaa) 100 ppm were applied. the leaf osmotic potential established every day during three days showed that plants treated with sadh presented lower (negative) osmotic potential.
Efeitos de ethephon e uréia na morfologia e produtividade do milho (Zea mays L.)
Castro, Paulo R.C.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1982, DOI: 10.1590/S0071-12761982000100005
Abstract: an experiment under natural environment conditions was carried out to investigate the effects of ethephon and urea on tassel elongation and apical dominance. zea mays cv. piran?o vf-2 plants were sprayed 38 days after sowing with ethephon (2-chloroethane phosphonic acid) 500 ppm, ethephon 500 ppm plus urea 2%, ethephon 1,000 ppm, ethephon 1,000 pmm plus urea 2%, ethephon 1,500 ppm, and ethephon 1,500 ppm plus urea 2%. the chemical accelerated tassel elongation as related to the control. ethephon retarded apical growth and reduced plant height. the height of apical ear was reduced by ethephon or ethephon plus urea. the growth regulator reduced the length of apical internodes of the plants.
Efeitos de fitoreguladores na florescência e produtividade da soja(Glycine max cv. Davis)
Castro, Paulo R.C.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1980, DOI: 10.1590/S0071-12761980000200015
Abstract: this study was conducted with the objective of determing the effects of growth regulators on flowering and productivity of soybean plant under greenhouse conditions. applications of (2-chloroethyl) trimethylammonium chloride (ccc) 2,000 ppm, succinic acid-2,2-dimethylhydrazide (sadh) 4,000 ppm, gibberellic acid (ga) 100 ppm, indolylacetic acid (iaa) 100 ppm, and water (check treatment) were made on plants showing 4 leaves. sadh delayed the beginning of flowering. ga reduced time for maximum flowering. sadh reduced the flowering time in relation to the check treatment. soybean plants treated with sadh produced a lower number of pods. 'davis' soybean sprayed with ga presented an increase in dry weight of stems.
Avalia??o da infesta??o natural de pragas das folhas em cultivares de soja (Glycine max (L.) Merrill)
Castro, Paulo R.C.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1981, DOI: 10.1590/S0071-12761981000100029
Abstract: damage caused by leaf pests of soybean on five cultivars was evaluated. afield experiment was carried out at the piracicaba region, cultivars davis, iac 73-228, pi 227.687,pi 171.451, and pi 229.358 having been compared. leaf damage was produced by natural infestation of anticarsia gemmatalis and plusia sp. cultivar pi 171.451 showed lower comsumption of leaves in relation to control ('davis') and other cultivars. damage was more serious on iac 73-228 than on pi 227.687 and pi 229.358.
Efeitos de fitoreguladores na produtividade da soja (Glycine max cv. Davis) em competi??o
Castro, Paulo R.C.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1981, DOI: 10.1590/S0071-12761981000100023
Abstract: the effects of growth substances on productivity of 'davis' soybean maintained under competition was investigated. before the flowering, agrostemmin (1 g/10 ml/3 1), gibberellic acid (ga) 100 ppm, and (2-chloroethyl) trimethylammonium chloride (ccc) 2,000 ppm were applied. at the flower anthesis, 2,3,5-triiodobenzoic acid (tiba) 20 ppm was applied. other two applications with tiba, with intervals of four days, were realized. the growth regulators did not affect the productivity of 'davis' soybean maintened under competition. the competition among plants did not affect the stem dry weight and number of pods, and seeds. the competition reduced weight of pods without seeds, seed weight, and weight of 100 seeds.
A??o do cepa e do ácido giberélico na frutifica??o da videira 'niagara rosada'
Castro, Paulo R.C.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1975, DOI: 10.1590/S0071-12761975000100010
Abstract: studies were carried out to establish the effects of exogenous growth regulators on vitis (labrusca x vinifera) 'niagara rosada' fruiting. the investigations were done in the jundiaí research station, agronomic institute state of s?o paulo, always using disease-free vineyards of good productivity. the morphological transformations of clusters were carried out under the following aspects: weight, length and width of cluster; number of berries; weight, length average and width average of berries; length average/width average ratio of berries; number of seeds; length and diameter of secondary rachis. that characteristics were determined at the time of maturity plus the total sugars, total acid, maturity index and reducing sugars in samples of all treatments. the experiment were conduced in order to determine the doses that resulted in the most beneficial effects, always using applications by immersion of the inflorescence. the experiment consisted of appplications of (2-chloroethyl) phosphonic acid (cepa) at concentrations of 50, 100, 250, 500, 1,000 and 2,000 ppm, 14 days before flowering; treatments with gibberellic acid at concentrations of 100 and 200 ppm before full bloom, 10 days after full bloom, and both before plus after full bloom. treatment with cepa 100 ppm plus gibberellic acid 100 ppm before full bloom and check treatment were also used. the use of cepa before flowering at the concentrations used, did not result in good results in 'niagara rosada' clusters; applications of gibberellic acid did not differ significantly from the nontreated vines under the conditions studied.
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