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Orthogonal frequency division multiple access (OFDMA) is a multiuser communication technique that allocates to each user a set of orthogonal carriers. In the presence of carrier frequency offset (CFO) the orthogonality a...

Kerr-lens mode-locked Ti:sapphire lasers are known to display three coexistent modes of operation: continuous wave, transform limited pulses (P1), and positive chirped pulses (P2). Extreme events (sometimes also called o...

The balance and sustainability of coffee agroecosystems in southwestern Antioquia depend on the interactions and synergisms that take place above and below the ground. Within these, the functional groups of edaphic macro...

El uso de abono es cada vez más frecuente en la agricultura por su efecto positivo sobre la fertilidad del suelo. El objetivo del presente estudio fue determinar la altura de planta, número de tallos por m2, longitud f...

To evaluate biomass components of Massai grass under five doses of N (0, 150, 300, 450 and 600 mg N/dm³ soil) during three cycles of growth (establishment, regrowth 1 and regrowth 2) this study was carried out. The expe...

This study evaluated the biomass flow of massai grass in regrowth subjected to different nitrogen levels (control - no fertilization; 400; 800; and 1200 N kg ha-1year-1) and under rotational stocking with sheep, in a com...

Background: Although assessment of pre and posttransplant quality of life is a current scientific target; it has not yet been carried out throughout the entire transplant process. Aims: 1) To analyze differences in menta...

Antecedentes: el ciberacoso, como forma de agresión violenta en entornos digitales, ha ganado relevancia debido a su impacto en la sociedad y al auge de las redes sociales. Este estudio analiza como ha evolucionado la p...

Agricultural expansion and intensification has led globally to a rapid landscape structure change and high agrochemical use resulting in habitat loss and degraded environmental quality. Co-occurrence of landscape change ...

El alga invasora Undaria pinnatifida (Phaeophyceae, Laminariales) fue reportada por primera vez en Golfo Nuevo en 1992, dispersándose ampliamente a lo largo de 170 km de costa en el norte de la Patagonia, Argentina. Obs...

El presente artículo, refleja los resultados de una investigación socio jurídica de método cualitativo, con alcance analítico descriptivo, que tuvo como objetivo analizar la aplicación del Precedente Administrativo...

Resumo Este estudo objetivou elaborar a Escala de Comportamentos de Bullying (ECB), checando evidências de validade e precisão. Participaram 455 estudantes do ensino fundamental de escolas públicas e particulares de P...

El trabajo presenta la experiencia festiva y pedagógica del Carnaval Soloriental desde la participación que en él tiene la escuela rural Los Soches (suroriente de Bogotá). Este carnaval escolar, que se realiza cada...

ABSTRACT Antimicrobial Growth Promoters (AGPs) have been phased out due to their link to antibiotic resistance. While their exact mode of action remains unknown, they are thought to reduce inflammation in the gut. This s...

Purpose: To compare the results obtained for tumour control probability (TCP) in protracted treatments, we used two models which apply Poisson statistics for clonogenic cell distribution and a non-Poissonian model, empha...

Vegetation cover is an important factor in soil microbial community composition and activity. We compared the effects of dominant plantspecies cover in a semi-arid scrub environment in northern Patagonia. We compared ind...

This study aimed to evaluate the growth index of massai grass during two regrowth cycles in a greenhouse under five levels of nitrogen (0, 150, 300, 450 and 600 mg N/dm³ of soil) and eight growth ages (5, 8, 11, 14, 17,...

Se denomina imposex a la aparición de caracteres sexuales secundarios en hembras de neogasterópodos producidos por laexposición a tributil-estaño (TBT). No existen hasta la fecha reportes de este fenómeno en el Cari...

This investigation aims at studying-by in situ grazing-incidence small-angle x-ray scattering-the process of growth of hexagonal CoSi2 nanoplatelets endotaxially buried in a Si(001) wafer. The early formation of spherica...

Materias / palabras clave: Salud

A source of entangled photons based on well-separated laser pump pulses (PDs) with a duration in the nanosecond range may be useful in many applications. Yet, such a source has intrinsic problems arising from the simulta...

"The phenomenon of phase inversion occurs in liquid-liquid dispersions found in a variety of chemical engineering fields. From simple oil-water mixtures to complex polymeric systems, the operating variables that affect...

Agricultural expansion threatens biodiversity due to habitat loss and fragmentation. In the Gran Chaco, a global deforestation hotspot, rampant cropland and pasture expansion raise concerns about the sustainability of th...