ChatGPT vs State-of-the-Art Models: A Benchmarking Study in Keyphrase Generation Task

Transformer-based language models, including ChatGPT, have demonstrated exceptional performance in various natural language generation tasks. However, there has been limited research evaluating ChatGPT's keyphrase generation ability, which involves identifying informative phrases that accurately reflect a document's content. This study seeks to address this gap by comparing ChatGPT's keyphrase generation performance with state-of-the-art models, while also testing its potential as a solution for two significant challenges in the field: domain adaptation and keyphrase generation from long documents. We conducted experiments on six publicly available datasets from scientific articles and news domains, analyzing performance on both short and long documents. Our results show that ChatGPT outperforms current state-of-the-art models in all tested datasets and environments, generating high-quality keyphrases that adapt well to diverse domains and document lengths

Cosmological scaling solutions of minimally coupled scalar fields in three dimensions

We examine Friedmann-Robertson-Walker models in three spacetime dimensions. The matter content of the models is composed of a perfect fluid, with a $\gamma$-law equation of state, and a homogeneous scalar field minimally coupled to gravity with a self-interacting potential whose energy density red-shifts as $a^{-2 \nu}$, where a denotes the scale factor. Cosmological solutions are presented for different range of values of $\gamma$ and $\nu$. The potential required to agree with the above red-shift for the scalar field energy density is also calculated.Comment: LaTeX2e, 11 pages, 4 figures. To be published in Classical and Quantum Gravit

Ischemic Stroke and Epilepsy in a Patient with Tourette´s Syndrome: Association with the Antiphospholipid Syndrome and Good Response to Levetiracetam

The role played by different humoral factors, including antiphospholipid antibodies, in the pathogenesis of Tourette syndrome (TS) is still presently unclear. We present a patient with chronic and severe TS who, at the age of 16 years, presented an ischemic stroke in the left posterior cerebral artery and/or postero-inferior temporal branch of the left medial cerebral artery. A complete study was negative with the exception of a positive lupus anticoagulant. The stroke was related with the primary antiphospholipid syndrome (APS). The stroke manifested visual abnormalities and thereafter by secondary generalized complex partial seizures. The epileptic syndrome was initially difficult to control but responded dramatically to levetiracetam. With this therapy, the manifestations of TS, especially the tics, improved. We conclude that some TS cases may present APS. In addition, levetiracetam may be useful in the management of TS. Further investigations should pursue both these facts

Light‐Emitting Diodes: Progress in Plant Micropropagation

In commercial micropropagation laboratories, the light source is one of the most important factors controlling plant morphogenesis and metabolism of plant cells and tissue and organ cultures. Lamp manufacturers have begun to rate lamps specifically for plant needs. The traditional light source used for in vitro propagation is fluorescent lamps (FLs). However, power consumption in FL use is expensive and produces a wide range of wavelengths (350–750 nm) unnecessary for plant development. Light‐emitting diodes (LEDs) have recently emerged as an alternative for commercial micropropagation. The flexibility of matching LED wavelengths to plant photoreceptors may provide more optimal production, influencing plant morphology and chlorophyll content. Although previous reports have confirmed physiological effects of LED light quality on morphogenesis and growth of several plantlets in vitro, these study results showed that LED light is more suitable for plant morphogenesis and growth than FLs. However, the responses vary according to plant species. This chapter describes the applications and benefits of LED lamps on chlorophyll in plant micropropagation. Two study cases are exposed, Anthurium (Anthurium andreanum) and moth orchids (Phalaenopsisis sp.), both species with economic importance as ornamental plants, where LEDs have a positive effect on in vitro development and chlorophyll content

New Physics effects in the flavor-changing neutral couplings of the Top quark

We survey the flavor-changing neutral couplings (FCNC) of the top quark predicted by some extensions of the Standard Model: THDM, SUSY, L-R symmetric, TC2, 331, and models with extra quarks. Since the expected sensitivity of the LHC and ILC for the tcV (V=\gamma,g,Z) and tcH couplings is of order of a few percent, we emphasize the importance of any new physics effect that gives a prediction for these FCNC couplings within this limit. We also review the constraints imposed on these couplings from low-energy precision measurements.Comment: 19 pages, 7 figures. Accepted as a review paper in Int. J. of Mod. Phys.

Fracturas patológicas en la región de la cadera

Entre 1973 y 1992, fueron tratados en nuestra institución 20 casos de fracturas patológicas a nivel de la cadera, secundarias a metástasis esqueléticas. Se realizó tratamiento quirúrgico mediante osteosíntesis o artroplastias según la localización y la extensión de la lesión. En 8 casos, la fractura fué subcapital, en 6 fué pertrocantérea y en otros 6 casos fué subtrocantérea. En el tratamiento quirúrgico, se recalca la importancia de la fijación interna inmediata con la adición de metilmetacrilato y el uso de la radioterapia postoperatoria. Siempre se obtuvo la mejoría del dolor y un resultado funcional bueno en el 70% de los casos. En 7 casos, aparecieron complicaciones locales. El tratamiento quirúrgico debe ser agresivo en estos pacientes, ya que la rehabilitación inmediata es primordial en su calidad de vida.From 1973 to 1992, 20 cases of pathological fractures around the hip secondary to skeletal metastases were treated in our institution. The surgical treatment was performed by internal fixation or arthroplasty according the location and extension of the lesion. In 8 cases the fracture was located in the femoral neck, 6 cases were intertrochanteric fractures and 6 cases were subtrochanteric fractures. In the surgical management the importance of inmediately internal fixation, with the use of methylnietacrilate and post surgical radiotherapy are justified. Always the pain was relieved and the functional result was good in 70%. In 7 cases were local complications. The surgical treatment should be more agresive in these special patients, because the inmediately rehabilitation is essential in your quality lifes

Aprovechamiento del bagazo de piña para obtener celulosa y bioetanol

Actualmente se están buscando nuevas alternativas energéticas a partir de biomasa, recursos renovables y desechos agroindustriales, para desarrollar nuevas tecnologías y procesos en la obtención de biocombustibles. El objetivo fue obtener celulosa y bio-etanol del bagazo de piña (desecho agrícola). El aprovechamiento de este bagazo evitará el consumo de cultivos destinados a la alimentación, evitando el uso excesivo de tierras y el empleo de residuos orgánicos agroindustriales. Además, el producto obtenido tiene un valor agregado y podría convertirse en un beneficio para los productores de piña. La finalidad fue estudiar un proceso para extraer celulosa del bagazo de piña, y mediante hidrólisis ácida de celulosa y bagazo se obtuvo glucosa. Esta glucosa se neutralizó a pH de 5 y se realizó la fermentación en un medio anaeróbico, utilizando el microorganismo Saccharomyces cerevisiae, variando tiempos de fermentación (36, 40, 48 y 72 h) y manteniendo la temperatura a 30ºC. La celulosa obtenida presentó una conversión del 60% y mediante FTIR se corroboró que la celulosa fue tipo II. Se obtuvo bio-etanol mediante destilación, presentando un rendimiento del 35% con bagazo y del 57% con celulosa con un tiempo de fermentación de 48 y 72 h, respectivamente

Seroprevalencia de la toxoplasmosis humana en Córdoba

Se realiza un estudio sobre seroprevalencia de la toxoplasmosis humana en Córdoba, mediante inmunofluorescencia indirecta y hemaglutinación indirecta. La muestra encuestada se compone de 443 sueros, 356 personas supuestamente sanas (estudiantes fundamentalmente) y 87, consideradas de “alto riesgo” (enfermos del Hospital “Reina Sofía”). La positividad obtenida para el total de la muestra ha sido del 43,79 % con IFI y 53,50 % para HAI. Con respecto al sexo, la prevalencia es superior en mujeres con un 54,36 % y 70,47 % con IFI y HAI, respectivamente, en varones el 38,43 % y 44,90 % para las mismas pruebas. En relación con la procedencia de la muestra, 31,lB % con IFI y 43,25 % para HAI sobre la población normal, en la de “alto riesgo” para ambas pruebas el 95,40 %. Entre ambas pruebas hay diferencias significativas a títulos bajos, no así en diluciones altas, Concluimos que la toxoplasmosis humana está presente y difundida en las poblaciones estudiadasA seroprevalency study of human toxoplasmosis was carried out in Córdoba, using indirect immunofluorescence and indirect haemoglutination. The sample of people interviewed was made up of 443 serums, 356 supposedly healthy people (mainly students) and 87, considered “high risk” (pafients from the “Reina Sofia” Hospital). The positiveness obtained for the total of the sample was 43,79 % with IFI and 53,59 % for HAI. As regards sex of the person tested, prevalence is higher in women, with 54,36 % and 70,47 % with IFI and HAI respectively, in men the scores were 38,43 % and 44,90 % for the same tests. As far as the origin of the sample was concerned, there were 31,lB % with IFI and 43,25 % for HAI of the nornal population, in the “high risk” sample, for both tests it was 9540 %. With both tests there are significative differences in low amounts, but not in high dilutions. We conclude that human toxoplasmosis is present and widespread in the studied population