Results 21 to 30 of about 1,815 (137)

Periodic dynamic systems for infected hosts and mosquitoes Sistemas dinâmicos periódicos para hospedeiros e mosquitos infectados

Revista de Saúde Pública, 1996
A mathematical model for the purpose of analysing the dynamic of the populations of infected hosts anf infected mosquitoes when the populations of mosquitoes are periodic in time is here presented.
W. M. Oliva, E. M. Sallum
doaj   +1 more source

Applications of dynamical inference to the analysis of noisy biological time series with hidden dynamical variables. [PDF]

, 2009
We present a Bayesian framework for parameter inference in noisy, non-stationary, nonlinear, dynamical systems. The technique is implemented in two distinct ways: (i) Lightweight implementation: to be used for on-line analysis, allowing multiple ...
Duggento, A., Luchinsky, D. G., McClintock, P. V. E., Millonas, M., Smelyanskiy, V. N.   +4 more
core   +1 more source

Bogotá: simultaneidad de transformaciones y contrastes urbanos [PDF]

Ciudades, 2006
Contradictory and simultaneous urban processes exist in Bogota, where great urban transformations with socio-space contrasts of great impact for the city are superposed. A general context of the situation in 2005 is indicated, making evident the elements
Carlos Alberto Torres Tovar
doaj  

Studies on the essential oil of different fennel (Foeniculum vulgare Mill.) populations during onthogeny

International Journal of Horticultural Science, 1999
In the recent studies two Foeniculum vulgare Mill. populations (Hungarian and Korean) had been studied in open field trials in 1997-98 in Budapest for the identification of their essential oil characteristics. The essential oil accumulation level as well
H. G. Chung, É. Németh, É. Héthelyi
doaj   +1 more source

Evolução do banco de sementes de arroz vermelho em diferentes sistemas de utilização do solo de várzeas Red rice seed bank evolution under different systems of lowland utilization

Planta Daninha, 2000
Num ecossistema agrícola, a redução do banco de sementes é um dos aspectos mais importantes no manejo de plantas daninhas; e em solos de várzeas, o arroz vermelho (Oryza sativa L.) é atualmente considerado a principal planta daninha.
Luis A. de Avila, Enio Marchezan, Sérgio L. de O. Machado, Ricardo P. da Silva   +3 more
doaj   +1 more source

Sistemas de cultivo no cerrado e dinâmica de populações de plantas daninhas Tillage systems in the cerrado and dinamics of weed populations

Planta Daninha, 2003
O trabalho teve como objetivo avaliar os efeitos de sistemas de plantio direto, utilizando diferentes programas de rotação de culturas, de preparo convencional e de cultivo mínimo sobre a dinâmica de populações de plantas daninhas nas condições edafoclimáticas do cerrado. Utilizou-se o delineamento experimental de blocos ao acaso, com quatro repetições
F.A.R. Pereira, E.D. Velini
openaire   +2 more sources

Effect of Sucrose as Carbon Source and Probiotic Administrations on Bacterial Population Dinamic and Water Quality in White Shrimp, Litopenaeus vannamei Culture

Jurnal Akuakultur Indonesia, 2007
<p>Disinfection and nutrient enrichment prior stocking of  post larvae in the pond will be affected on the growth and composition of microbe.  Attention should be taken to some factors related to deterministic and stochastic factors of aquaculture environment  in order to develop microbe community.  This study was performed to determine effect of
. Sukenda, P. Hadi, E. Harris
openaire   +3 more sources

Ultrafast supercontinuum spectroscopy of carrier multiplication and biexcitonic effects in excited states of PbS quantum dots

, 2011
We examine the multiple exciton population dynamics in PbS quantum dots by ultrafast spectrally-resolved supercontinuum transient absorption (SC-TA). We simultaneously probe the first three excitonic transitions over a broad spectral range.
Andreev A. D., Beard M. C., Beard M. C., Beard M. C., Beard M. C., Bose R., Bose R., C. B. Murray, C. W. Wong, Cademartiri L., Cho B., Efros A. L., Ellingson R. J., F. Gesuele, Franceschetti A., Henry E. R., Ji M., Kambhampati P., Kang I., Klimov V. I., Klimov V. I., Klimov V. I., Liljeroth P., Luther J. M., M. Y. Sfeir, McGuire J. A., McGuire J. A., Moreels I., Murray C. B., Nair G., Nootz G., Nozik A. J., Nozik A. J., Peterson J. J., Pijpers J. J. H., Piryatinski A., Rabani E., Sambur J. B., Schaller R. D., Schaller R. D., Schaller R. D., Schins J. M., Sfeir M. Y., Shaller R. D., Shockley W., Sukhovatkin V., Sykora M., T. F. Heinz, Timmerman D., Trinh M. T., Trinh M. T., W.-K. Koh, Wehrenberg B. L.   +52 more
core   +1 more source

Quantum Phases of Attractive Matter Waves in a Toroidal Trap

, 2005
Investigating the quantum phase transition in a ring from a uniform attractive Bose-Einstein condensate to a localized bright soliton we find that the soliton undergoes transverse collapse at a critical interaction strength, which depends on the ring ...
A. Parola, L. Reatto, L. Salasnich, L. Salasnich, R. Rota, Y. Castin   +5 more
core   +1 more source

Ionized and neutral gas in the peculiar star/cluster complex in NGC 6946 [PDF]

, 2007
The characteristics of ionized and HI gas in the peculiar star/cluster complex in NGC 6946, obtained with the 6-m telescope (BTA) SAO RAS, the Gemini North telescope, and the Westerbork Synthesis Radio Telescope (WSRT), are presented.
Afanasiev, V. L., Alfaro, E. J., Bastian, N., Boomsma, R., Efremov, Yu. N., Garcia-Lorenzo, B., Hodge, P. W., Larsen, S., Munoz-Tunon, C., Sanchez-Gil, M. C., Silchenko, O. K.   +10 more
core   +2 more sources