On the support of solutions to the Zakharov-Kuznetsov equation

In this article we prove that sufficiently smooth solutions of the Zakharov-Kuznetsov equation that have compact support for two different times are identically zero.Comment: Version of Dec 17/2010 contains simpler proof of Theorem 1.3 and new references are adde

Cricket antennae shorten when bending (Acheta domesticus L.).

Insect antennae are important mechanosensory and chemosensory organs. Insect appendages, such as antennae, are encased in a cuticular exoskeleton and are thought to bend only between segments or subsegments where the cuticle is thinner, more flexible, or bent into a fold. There is a growing appreciation of the dominating influence of folds in the mechanical behavior of a structure, and the bending of cricket antennae was considered in this context. Antennae will bend or deflect in response to forces, and the resulting bending behavior will affect the sensory input of the antennae. In some cricket antennae, such as in those of Acheta domesticus, there are a large number (>100) of subsegments (flagellomeres) that vary in their length. We evaluated whether these antennae bend only at the joints between flagellomeres, which has always been assumed but not tested. In addition we questioned whether an antenna undergoes a length change as it bends, which would result from some patterns of joint deformation. Measurements using light microscopy and SEM were conducted on both male and female adult crickets (Acheta domesticus) with bending in four different directions: dorsal, ventral, medial, and lateral. Bending occurred only at the joints between flagellomeres, and antennae shortened a comparable amount during bending, regardless of sex or bending direction. The cuticular folds separating antennal flagellomeres are not very deep, and therefore as an antenna bends, the convex side (in tension) does not have a lot of slack cuticle to "unfold" and does not lengthen during bending. Simultaneously on the other side of the antenna, on the concave side in compression, there is an increasing overlap in the folded cuticle of the joints during bending. Antennal shortening during bending would prevent stretching of antennal nerves and may promote hemolymph exchange between the antenna and head

"El carácter absoluto del dominio" : el pensamiento de Vélez Sarsfield

Fil: Bustamente Alsina, Jorge Horacio. Universidad de Buenos Aires. Facultad de Derecho. Cátedra Derecho Civil IV. Buenos Aires, Argentin

A-real compact space

Sin resume

Índice neutrófilo-linfocito (inl) como factor predictor de complicaciones tempranas postoperatorias de cirugía bariátrica

Determinar la utilidad del índice Neutrófilo-linfocito como predictor de complicaciones tempranas en pacientes post operados de cirugía bariátrica eb en los hospitales Víctor Lazarte Echegaray y Alta complejidad Virgen de la Puerta entre los años 2015 y 2023. Material y métodos: Se llevó a cabo un estudio analítico de cohorte retrospectivo donde se incluyeron a 192 pacientes operados de cirugía bariátrica y que cumplieran los criterios de inclusión. Se recopilaron las variables de interés. Las variables cualitativas fueron evaluadas mediante la prueba de Chi- cuadrado de Pearson con riesgo relativo, utilizando intervalos de confianza del 95%. Para las variables cuantitativas se usó la prueba U de Mann-Withney. La significancia estadística se estableció con valor de 5% (p<0.05). Resultados: Según la prueba de Riesgo Relativo (RR), por análisis multivariado, se encontró que, el INL elevado no se asoció de forma significativa a la presencia de complicaciones tempranas (ORa = 1,71; IC 95% = 0,61 – 4,80; p = 0,31). Sumado a ello, no se encontró otro factor asociado a dichas complicaciones en los pacientes. La mediana de edad fue de 43 años y la mediana de tiempo operatorio fue de 222,5 minutos. Asimismo, un 64,1% fueron mujeres y un 35,9% fueron varones, un 40,6% padecían de hipertensión arterial, un 33,3% tenía diabetes, un 40,6% mostró hipercolesterolemia. En relación a las complicaciones tempranas, hubo un 15,1% donde, del total de pacientes, ninguno mostró sangrado ni trombosis venosa profunda, un 2,1% tenía tromboembolismo pulmonar, un 1,6% mostró dehiscencia, un 1,0% tenía estenosis, un 9,9% tuvo infección del sitio operatorio (ISO) y un 2,1% mostró infección de vías urinarias. Además, un 25% evidenció un índice neutrófilo- linfocito (INL) elevado. Conclusión: El índice neutrófilo-linfocito no se asoció de manera significativa (ORa = 1,71; IC 95% = 0,61 – 4,80; p = 0,31) a la presencia de complicaciones tempranas de post operados de cirugía bariátrica en los hospitales Víctor Lazarte Echegaray y Alta complejidad Virgen de la Puerta entre los años 2015 y 2023.To determine the usefulness of the Neutrophil-lymphocyte index as a predictor of early complications in patients post-operative with EB bariatric surgery at the Víctor Lazarte Echegaray and Alta complexity Virgen de la Puerta hospitals between the years 2015 and 2023. Material and methods: A retrospective cohort analytical study was carried out where 192 patients who underwent bariatric surgery and who met the inclusion criteria were included. The variables of interest were collected. Qualitative variables were evaluated using Pearson's Chi-square test with relative risk, using 95% confidence intervals. The Mann-Withney U test was used for quantitative variables. Statistical significance was developed with a value of 5% (p<0.05). Results: According to the Relative Risk (RR) test, by multivariate analysis, it was found that elevated NLR was not significantly associated with the presence of early complications (aOR = 1.71; 95% CI = 0.61 – 4. 80; p = 0.31). In addition to this, no other factor was found associated with these complications in the patients. The median age was 43 years and the median operative time was 222.5 minutes. Likewise, 64.1% were women and 35.9% were men, 40.6% suffered from high blood pressure, 33.3% had diabetes, 40.6% showed hypercholesterolemia. In relation to early complications, there were 15.1% where, of the total number of patients, none showed bleeding or deep vein thrombosis, 2.1% had pulmonary thromboembolism, 1.6% showed dehiscence, 1.0% had stenosis, 9.9% had surgical site infection (SSI) and 2.1% had urinary tract infection. Additionally, 25% showed a high neutrophil-lymphocyte ratio (NLR). Conclusion: The neutrophil-lymphocyte index was not significantly associated (aOR = 1.71; 95% CI = 0.61 – 4.80; p = 0.31) with the presence of early complications after bariatric surgery. in the Víctor Lazarte Echegaray and Alta complexity Virgen de la Puerta hospitals between 2015 and 2023Tesi