Convolutional Goppa Codes

We define Convolutional Goppa Codes over algebraic curves and construct their corresponding dual codes. Examples over the projective line and over elliptic curves are described, obtaining in particular some Maximum-Distance Separable (MDS) convolutional codes.Comment: 8 pages, submitted to IEEE Trans. Inform. Theor

XMM-Newton and Deep Optical Observations of the OTELO fields: the Groth-Westphal Strip

OTELO (OSIRIS Tunable Emission Line Object Survey) will be carried out with the OSIRIS instrument at the 10 m GTC telescope at La Palma, and is aimed to be the deepest and richest survey of emission line objects to date. The deep narrow-band optical data from OSIRIS will be complemented by means of additional observations that include: (i) an exploratory broad-band survey that is already being carried out in the optical domain, (ii) FIR and sub-mm observations to be carried with the Herschel space telescope and the GTM, and (iii) deep X-Ray observations from XMM-Newton and Chandra.Here we present a preliminary analysis of public EPIC data of one of the OTELO targets,the Groth-Westphal strip, gathered from the XMM-Newton Science Archive (XSA). EPIC images are combined with optical BVRI data from our broadband survey carried out with the 4.2m WHT at La Palma. Distance-independent diagnostics (involving X/O ratio, hardness ratios, B/T ratio) are tested.Comment: 2 pages, 2 figures, uses graphicx package. To appear in proceedings of "The X-Ray Universe 2005", San Lorenzo del Escorial, Spain, September 26-30, 200

Effect of wheat inclusion and xylanase supplementation of the diet on intestinal enzyme activity, nutrient retention and performance in laying hen from 25 to 47 wks of age

A trial was conducted to examine the effects of increasing levels of wheat in the diet and xylanase (ES) supplementation on nitrogen and ether extract retention, pH of the GIT, productive performance from 25 to 47 wks of age, and enzyme activity at the small intestine level. The basal diets (from 25 to 33 wks and from 33 to 47 wks) consisted of soybean meal and corn, and the wheat was introduced in the experimental diets at expenses of corn, primarily

Efectos de la inclusión de trigo y suplementación con xilanasas del pienso sobre la actividad enzimática intestinal, la retención de los nutrientes y la productividad en gallinas de 25 a 33 semanas de edad

El trigo es un cereal rico en xilanos lo que reduce su potencial en piensos para aves de puesta por su efecto perjudicial sobre la digestibilidad y el porcentaje de huevos sucios (Lázaro et al., 2003). La utilización de xilanasas podría resolver esta problemática y mejorar la productividad de las aves. Diversos autores (Gracia et al., 2003) han estudiado los efectos de la inclusión de xilanasas en el pienso sobre la digestibilidad de los nutrientes y la productividad (Gutiérrez-Álamo et al., 2008). Sin embargo, sus efectos sobre la producción de enzimas endógenas y el pH de los diversos segmentos del tracto gastrointestinal (TGI) han sido poco estudiados. El objetivo de este ensayo fue estudiar la inclusión de una variedad de trigo de alto contenido en xilanos sobre diversas variables digestivas y la productividad en aves de puesta blancas

Chronic subdural haematoma complicating spinal anaesthesia: A case report and review of literature

Subdural haematoma is a rare but serious complication of dural puncture. We report a case of chronic subdural haematoma, which occurred following spinal anaesthesia for elective caesarean section. A 34-year-old multiparous woman presented with a post-dural puncture headache (PDPH) following spinal anaesthesia. The headache was nonresponsive to analgesics, bed rest and rehydration. CT-scan was done and showed a large right fronto-parietal subdural hematoma. This was drained successfully with complete recovery. Prolonged and severe post-dural puncture headache may be the only clinical indicator of post-spinal anaesthesia intracranial complications, and should be promptly investigated

Apparent digestibility and metabolizable energy content of lipid sources in poultry

A trial was conducted to determine the apparent digestibility (ATTD) and AME content of different lipid sources in 21d-old broilers. There were a control diet based on corn and soybean meal without any supplemental fat and 6 additional diets forming a 3x2 factorial with 3 sources of fat (soy oil, SBO; reconstituted monoglyceride oil, RMG; and reconstituted triglyceride oil, RTG) included in the diet (3 or 6%) at expenses (wt:wt) of the basal diet

The Luminosity Function Evolution of Soft X--ray selected AGN in the RIXOS survey

A sample of 198 soft X--ray selected active galactic nuclei (AGN) from the ROSAT International X--ray Optical Survey (RIXOS), is used to investigate the X--ray luminosity function and its evolution. RIXOS, with a flux limit of 3E-14 erg s-1 cm-2 (0.5 to 2.0 keV), samples a broad range in redshift over 20 deg^2 of sky, and is almost completely identified; it is used in combination with the Einstein Extended Medium Sensitivity Survey (EMSS), to give a total sample of over 600 AGN. We find the evolution of AGN with redshift to be consistent with pure luminosity evolution (PLE) models in which the rate of evolution slows markedly or stops at high redshifts z>1.8. We find that this result is not affected by the inclusion, or exclusion, of narrow emission line galaxies at low redshift in the RIXOS and EMSS samples, and is insensitive to uncertainties in the conversion between flux values measured with ROSAT and Einstein. We confirm, using a model independent Ve/Va test, that our survey is consistent with no evolution at high redshifts.Comment: 10 pages, LaTeX file, PS figures and mn.sty. Accepted in MNRA