Motivated by the interest to study PMSE in Antarctica and Equatorial Electrojet along the southern Peruvian coasts, a VHF radar was developed and installed in 1998 by the Jicamarca Radar Observatory group on board the Peruvian research vessel BIC Humboldt (see description on a companion paper by Woodman, et. al). During the test runs of this radar, very strong echoes from the Andes were observed. In order to obtain profiles of the mountains and other facing targets, as glaciers in Antarctica, sorne efforts have been carried out to observe and process these echoes using Synthetic Aperture Radar (SAR) techniques SAR is a well known airborne (or spaceborne) radar mapping technique for generating high resolution maps of surface target areas and terrain. SAR applications include topographic mapping, surface deformation studies related to seismic activity and extraction of oíl and ground wate...

This paper describes a signal processing and control system, designed and built for the Peruvian MST radar installed in the "Machu-Picchu" Scientific Station, Antarctica (62 º05'5 S, 58º28' W). System architecture, based in a single PC and two DSP boards, and design considerations are discussed. Toe system allows up to 4 receiver signals to be processed in parallel, with 60 range gates and 150 m maximum height resolution. System evaluation and sorne experimental results are reported.

This paper describes a signal processing and control system, designed and built in collaboration between Jicamarca Radar Observatory and University of Piura, Peru, for the peruvian MST radar installed in the "Machu-Picchu" Scientific Station, Antarctica (62 05'5 S, 58 28' W). An identical system has been built for the Jicamarca Unattended Long-term Investigations of the Atmosphere (JULIA) project.

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Follicular growth through chorionic gonadotropin can be carried out at any time of the sexual cycle. Most authors agree in which to induce follicular growth, proliferative off period of the sexual cycle, gonadotropic stimulation increased in relation to the timing of the secretory phase in which the stimulation is performed is reqeriría.

Since 1940, when it was founded in Huancayo Laboratory of the Institute of Andean Biology, we have been interested in studies of reproductive physiology in relation to height, and as we progressed in our research, emphasized increasing the need for deepen this work, both in the field of endocrinology and early embryology, points began to study in 1947 with experience at sea level and were intended to serve as a baseline for future work at altitude, but the results we have been getting on these experiences, along with the spread and increasing use in the daily practice of medicine, not just products ganadotrópicos both equine and human origin, but also of ovarian hormone products, has led us to submit this thesis in the hope that it can serve as a contribution to elucidate concepts in the use of these hormonal products.

Differences were observed reaction in the two species studied. Instead of altitude results in increased excretion of metabolites derived from sexoides, cortical and gonadal steroids, variations are more pronounced in rabbits. These results raise the possibility that nonspecific adaptive mechanisms in which predornina protein catabolism, so fleeting that would go unnoticed in observations that are made within 4 days of the change in altitude and rather indicate that in adapting to the height mechanisms exist predominance of protein anabolism. The association of high and ACTH not mask the excretion of metabolites derived from steroids sexoide type. The association of high serum gonadotropin treatment and intensifies, in the rabbit, increased metabolites latter while a reaction in the guinea pig, similar to what occurs with only the altitude change is observed.

Differences were observed reaction in the two species studied. Instead of altitude results in increased excretion of metabolites derived from sexoides, cortical and gonadal steroids, variations are more pronounced in rabbits. These results raise the possibility that nonspecific adaptive mechanisms in which predornina protein catabolism, so fleeting that would go unnoticed in observations that are made within 4 days of the change in altitude and rather indicate that in adapting to the height mechanisms exist predominance of protein anabolism. The association of high and ACTH not mask the excretion of metabolites derived from steroids sexoide type. The association of high serum gonadotropin treatment and intensifies, in the rabbit, increased metabolites latter while a reaction in the guinea pig, similar to what occurs with only the altitude change is observed.

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Este artículo describe el radar coherente VHF instalado a bordo del Buque de Investigación Científica B.I.C. Humboldt. El sistema fue diseñado y construido en el Radio Observatorio de Jicamarca. El instrumento cuenta con un arreglo de antenas tipo COCO de 24x2 l m, especialmente diseñado para su instalación en un buque. Se presenta una descripción del instrumento, así como los primeros resultados de las observaciones de Ecos Mesosféricos Polares de Verano (PMSE) en la Antártida y del Electrochorro Ecuatorial a lo largo de la costa Sur del Perú.

The mesosphere-stratosphere-troposphere (MST) radar at Jicamarca, Peru (12S, 77W), made extended (15 day or longer) observations of the horizontal and vertical winds that were used to infer the diurnal and semidiurnal tides. The measurements were made during several months from mid-1997 through mid-1998 and using a higher-power transmitter and finer range resolution during 10 days of August 1998. The three-component winds are used to estimate amplitudes, phases, and momentum fluxes associated with the tides. Thermal forcing of the diurnal tide is also examined with diurnal water vapor heating rates calculated using data from the NASA Water Vapor Project (NVAP). For the region near Jicamarca the calculations from NVAP showed the temporal variability of the diurnal heating to be dominated by an annual cycle with maximum around the summer solstice. When projected into tidal modes, about 25%...

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The fabrication of ultra-sharp tips from carbon fiber (CF), which are mounted on a qPlus probe for combined dynamic scanning tunneling microscopy (STM) and frequency modulation atomic force microscopy (FM-AFM) experiments, is reported. The carbon fiber tips were electrochemically etched in a KOH or NaOH solution, using different electronic devices. CF tips with an apex radius ∼10 nm, as deduced from the measured slopes of the Fowler–Nordheim plots (kR < 70 nm for k ∼ 6), were routinely obtained with a homemade electronic device that controls the intensity of the etching current. Then, these conductive CF tips were also characterized by imaging the 6H-SiC(0 0 0 1) surface covered by an epitaxial graphene layer in ultra-high vacuum (UHV). The lattice of the R30° reconstruction was regularly imaged by STM working either in non-oscillating mode or in dynamic mode, which also maps the ...

Snakebite envenoming is a global neglected disease with an incidence of up to 2.7 million new cases every year. Although antivenoms are so-far the most effective treatment to reverse the acute systemic effects induced by snakebite envenoming, they have a limited therapeutic potential, being unable to completely neutralize the local venom effects. Local damage, such as dermonecrosis and myonecrosis, can lead to permanent sequelae with physical, social, and psychological implications. The strong inflammatory process induced by snake venoms is associated with poor tissue regeneration, in particular the lack of or reduced skeletal muscle regeneration. Mesenchymal stromal cells (MSCs)-based therapies have shown both anti-inflammatory and pro-regenerative properties. We postulate that using allogeneic MSCs or their cell-free products can induce skeletal muscle regeneration in snakebite victims...