Flow of strange and charm particles in Pb--Pb collisions at sqrt{s_{NN}} = 2.76 TeV measured with ALICE

The ALICE experiment studies Pb-Pb collisions at the LHC in order to investigate the properties of the hot and dense QCD matter at extreme energy densities. Recent results from ALICE in identified particle flow allow for the exploration of the collective properties of the medium created in heavy-ion collisions. In this paper, I give special attention to strange and charm particles which probe the medium differently and thus provide new constraints for the study of its properties. The paper covers results on elliptic flow for pion, kaon, kzero, antiproton, phi, lambda, xi, omega, dplus, dzero and dstar measured at midrapidity by ALICE in Pb-Pb collisions at sqrt{s_{NN}} = 2.76 TeV. I present also the comparison with available models that predict the hydrodynamical evolution of the medium and the energy loss of light and heavy quarks as they travel through.Comment: 6 pages, 7 figures, ICHEP 2012 proceeding

Access Services Based on MHP Interactive Applications

In this paper it is described how interactive applications can be used to provide access services for people with disabilities in digital television. MHP (Multimedia Home Platform) is a standardized middleware to develop interactive applications in digital television. In this way, the interactive applications become tools for the provision of the access services. These features have been exploited in a research project to create a subtitle application for the deaf and hard of hearing people and an accessible electronic program guide for blind people

Photodiodes based in La0.7Sr0.3MnO3/single layer MoS2 hybrid vertical heterostructures

The fabrication of artificial materials by stacking of individual two-dimensional (2D) materials is amongst one of the most promising research avenues in the field of 2D materials. Moreover, this strategy to fabricate new man-made materials can be further extended by fabricating hybrid stacks between 2D materials and other functional materials with different dimensionality making the potential number of combinations almost infinite. Among all these possible combinations, mixing 2D materials with transition metal oxides can result especially useful because of the large amount of interesting physical phenomena displayed separately by these two material families. We present a hybrid device based on the stacking of a single layer MoS2 onto a lanthanum strontium manganite (La0.7Sr0.3MnO3) thin film, creating an atomically thin device. It shows a rectifying electrical transport with a ratio of 103, and a photovoltaic effect with Voc up to 0.4 V. The photodiode behaviour arises as a consequence of the different doping character of these two materials. This result paves the way towards combining the efforts of these two large materials science communities.Comment: 1 table, 4 figures (+9 supp. info. figures

Análisis estadístico por regresión lineal de la prevalencia de pie plano en preescolar de una comunidad de México

Context: In Mexico's rural towns, it is essential to generate a culture of studying the prevalence of flat feet in children aged 3 to 5, whose arch is still in development and can be corrected. By means of a computer application, statistical bar graph and correlation studies via linear regression can validate the results obtained regarding the categorization of infants' footprint type, which are acquired through the Hernández Corvo index (HCI), Clarke’s angle protocol (CA), the Staheli index (SI), the Chippaux index (CI), and the body mass index (BMI). Methods: A statistical analysis of the plantar footprint of 95 infants in a rural region of Mexico was carried out, employing a computational technique together with a photo-podoscope. Footprint images were acquired, processed, and classified. The footprint type was categorized with respect to the HCI, CA, and the Staheli-Chippaux index (SCI). The footprint distribution was validated via the linear regression method. Results: We evidenced a prevalence of flat foot of 54,7% in relation to HCI, 58,9% in relation to CA, and 61,05% in relation to SCI, where the male gender was shown to be more susceptible (up to 28, 32, and 33 cases, respectively). The best prediction was obtained using the SI and the CI: 90,7 and 87,0% for the right and left feet, with a positive increase. No dependence on body composition was observed. Conclusions: The diagnosis of the type of footstep, in its normal, cavus, and flat categories, shows the prevalence of flat feet among infants aged 3 to 5, with at least 28 cases, mostly male and without dependence on weight. Although it is difficult to perform plantar footprint diagnoses in the rural communities of Mexico, this statistical study highlights the importance of monitoring foot development in preschool infants with the advantages and practicality of computational techniques.Contexto: En las comunidades de México, es fundamental generar una cultura de estudiar la prevalencia del pie plano en niños de 3 a 5 años, cuyo arco aún está en desarrollo y se puede corregir. Mediante el uso de una aplicación computacional, los estudios estadísticos de gráficos de barras y correlación por medio de regresión lineal validan los resultados sobre la categorización del tipo de pisada del infante, los cuales se adquieren mediante el índice Hernández Corvo (HCI), el protocolo del ángulo de Clarke (CA), el índice Staheli (SI), el índice Chippaux (CI) y el índice de masa corporal (BMI). Método: Se realizó un análisis estadístico de la huella plantar de 95 infantes de una comunidad de México, empleando una técnica computacional junto con un fotopodoscopio. Se adquirió, procesó y clasificó la imagen de la pisada. Se categorizó el tipo de pisada con respecto al HCI, el CA y el índice Staheli-Chippaux (SCI). La distribución de las huellas se validó mediante el método de regresión lineal. Resultados: Se evidenció una prevalencia de pie plano de 54,7 % respecto al HCI, 58,9 % respecto al CA y 61,05 % respecto al SCI, donde el sexo masculino fue el más susceptible (hasta 28, 32 y 33 casos). La mejor predicción se obtuvo mediante el SI y el CI: 90,7 y 87,0% para los pies derecho e izquierdo, con incremento positivo. No se observó dependencia con la composición corporal. Conclusiones: El diagnóstico del tipo de pisada, en sus categorías normal, cavo y plano, evidencia la prevalencia del pie plano entre los infantes de 3 a 5 años, con al menos 28 casos, en su mayoría masculinos y sin dependencia del peso. Si bien es difícil realizar diagnósticos de huella plantar en las comunidades rurales de México, este estudio estadístico muestra la importancia de monitorear el desarrollo del pie en infantes de preescolar, con las ventajas y la practicidad de las técnicas computacionales.

Examining story production improving creative thinking in the alpha generation: A systematic review

Purpose: The present systematic review study had the general objective of analyzing and synthesizing the existing scientific evidence on the effectiveness of the production of stories to improve creativity in the alpha generation. Methodology: The PRISMA 2020 method was used to develop a systematic review where the databases used were Scopus, ScienceDirect, Web of Science and university repositories, with the search strategy ("production of stories") AND ("creativity" OR "creative thinking") AND ("primary education") in Spanish and English. After applying the inclusion and exclusion criteria, 10 articles containing a total of 1088 sample elements were obtained. Findings: The works were mainly of a quasi-experimental design, using story production programs as an independent variable, and in the last two years adding digital and audiovisual resources. No standardized instrument was found for the evaluation of creativity. Implications to Research and Practice: sIn the experimental design studies, the positive influence of the production of stories on creativity in primary school students of the alpha generation was demonstrated, in the correlational studies a moderate and significant relationship was evidenced. It is striking that, contrary to what is suggested by specialists, the number of sessions reported is less than those recommended without losing effectiveness

Statistical Analysis by Linear Regression of the Prevalence of Flatfoot in Preschool Children of a Mexican Community

Context: In Mexico's rural towns, it is essential to generate a culture of studying the prevalence of flat feet in children aged 3 to 5, whose arch is still in development and can be corrected. By means of a computer application, statistical bar graph and correlation studies via linear regression can validate the results obtained regarding the categorization of infants' footprint type, which are acquired through the Hernández Corvo index (HCI), Clarke’s angle protocol (CA), the Staheli index (SI), the Chippaux index (CI), and the body mass index (BMI). Methods: A statistical analysis of the plantar footprint of 95 infants in a rural region of Mexico was carried out, employing a computational technique together with a photo-podoscope. Footprint images were acquired, processed, and classified. The footprint type was categorized with respect to the HCI, CA, and the Staheli-Chippaux index (SCI). The footprint distribution was validated via the linear regression method. Results: We evidenced a prevalence of flat foot of 54,7% in relation to HCI, 58,9% in relation to CA, and 61,05% in relation to SCI, where the male gender was shown to be more susceptible (up to 28, 32, and 33 cases, respectively). The best prediction was obtained using the SI and the CI: 90,7 and 87,0% for the right and left feet, with a positive increase. No dependence on body composition was observed. Conclusions: The diagnosis of the type of footstep, in its normal, cavus, and flat categories, shows the prevalence of flat feet among infants aged 3 to 5, with at least 28 cases, mostly male and without dependence on weight. Although it is difficult to perform plantar footprint diagnoses in the rural communities of Mexico, this statistical study highlights the importance of monitoring foot development in preschool infants with the advantages and practicality of computational techniques

Concurrent chemo-radiotherapy following neoadjuvant chemotherapy in locally advanced breast cancer

<p>Abstract</p> <p>Background</p> <p>Despite broad advances in multimodal treatment of locally advanced breast cancer (LABC), 30 to 40% of patients develop loco-regional relapse. The aim of this study was to analyze in a retrospective manner the effectiveness of concurrent chemo-radiotherapy (CCRTh) after neoadjuvant chemotherapy (NCT) in patients with LABC.</p> <p>Methods</p> <p>One hundred twelve patients with LABC (stage IIB-IIIB) were treated with NCT (5-fluorouracil 500 mg/m², doxorubicin 50 mg/m², and cyclophosphamide 500 mg/m²(FAC), or doxorubicin 50 mg/m²and cyclophosphamide 500 mg/m²(AC) IV in four 21-day courses) followed by CCRTh (60 Gy breast irradiation and weekly mitomycin 5 mg/m², 5-fluorouracil 500 mg/m², and dexamethasone 16 mg, or cisplatin 30 mg/m², gemcitabine 100 mg/m²and dexamethasone 16 mg), and 6–8 weeks later, surgery and two additional courses of FAC, AC, or paclitaxel 90 mg/m²weekly for 12 weeks, and in case of estrogen-receptor positive patients, hormonal therapy.</p> <p>Results</p> <p>Stages IIB, IIIA and -B were 21.4, 42.9, and 35.7%, respectively. Pathological complete response (pCR) in the breast was 42% (95% CI, 33.2–50.5%) and, 29.5% (95% CI, 21.4–37.5%) if including both the breast and the axillary nodes. Multivariate analysis showed that the main determinant of pCR was negative estrogen-receptor status (HR = 3.8; 95% CI, 1.5–9; <it>p </it>= 0.016). The 5-year disease-free survival (DFS) was 76.9% (95% CI, 68.2–84.7%). No relationship between pCR and DFS was found. Multivariate analysis demonstrated that the main DFS determinant was clinical stage (IIB and IIIA <it>vs. </it>IIIB, HR = 3.1; 95% CI, 1.02–9.74; <it>p </it>= 0.04). Only one patient had local recurrence. Five-year overall survival was 84.2% (95% CI, 75–93.2%). The toxicity profile was acceptable.</p> <p>Conclusion</p> <p>This non-conventional multimodal treatment has good loco-regional control for LABC. Randomized clinical trials of preoperative CCRTh following chemotherapy, in patients with LABC are warranted.</p

Efficient CeO₂ and CeO₂–Al₂O₃ supports for Ru as 3rd generation ammonia synthesis catalysts: enhanced kinetic mechanism over commercial Ru/CeO₂

Ceria (CeO2) has been previously reported as a functional support for ruthenium (Ru) as an ammonia synthesis catalyst. However, lab-synthesized ceria materials usually present low surface areas, thereby limiting the generation of oxygen vacancies and the ammonia synthesis activity as a result of weak metal–support interactions. With the aim of overcoming this issue, we prepared, by a simple impregnation method, high surface area ceria and ceria–alumina supported Ru catalysts with improved ammonia synthesis performance at moderate temperatures. In this sense, lab-synthesized Ru/CeO2 (with higher specific surface area and lower crystallinity than commercial ceria) showed stronger metal–support interactions than the commercial sample, which resulted in a superior global ammonia synthesis kinetic mechanism with more positive hydrogen reaction orders (i.e., more resistant to hydrogen inhibition) and significantly lower activation energies (46 vs. 61 kJ mol−1). We found that the use of alumina as a structural support increased the surface area of ceria, thereby promoting the Ru–CeO2 interaction and the catalytic performance. We analyzed the effect of the surface chemistry of two different commercial aluminas (acidic and basic) with similar surface areas. Basic alumina was found to increase the specific surface area of the catalyst to a larger extent as compared to acidic alumina. Thus, the Ru/CeO2–Al2O3 catalyst with 50 wt% of basic alumina showed an ammonia synthesis activity of 1.9 mmol g−1 h −1 at 400 °C and ambient pressure and an activation energy as low as 44.8 kJ mol−1.Es el preprint del artículo. Se puede consultar la versión final en https://doi.org/10.1039/D5CY00122FThis publication is part of the project BioEnH2, funded by MCIN/AEI/https://doi.org/10.13039/501100011033 and by European Union NextGenerationEU/PRTR. The authors want to acknowledge the University of Cádiz (UCA) for their services in the microscopy field and their gentle analyses and reports