Comments on the PLA article 'UCN anomalous losses and the UCN capture cross section on material defects' [Phys. Lett. A 335 (2005) 327]

We comment on the paper `UCN anomalous losses and the UCN capture cross section on material defects' by A. Serebrov et al., Phys. Lett. A 335 (2005) 327 - 336. Data presented do not originate from these authors alone but were taken in collaboration with several other authors and institutes not mentioned.Comment: 4 page

Magnetic studies of GaN nanoceramics

The synthesis, morphology and magnetization measurements of GaN nanoceramics obtained under high pressure are reported. In particular the effect of grain size on magnetic properties of GaN nanopowders and nanoceramics was investigated. It was found that for the GaN nanoceramic characterized by the stronger deformation of nanocrystalline grains the diamagnetic signal changes with external magnetic field similarly to the Meissner effect in superconductors.Comment: 3 pages, 4 figures, accepted Appl.Phys.Let

Reproductive behaviour of Plectroctena mandibularis F. Smith (Hymenoptera: Formicidae), a ponerine ant with ergatoid queens

[From the text]: The present study reports on new observations on the reproductive biology of P. mandibularis, particularly the phenology of males, mating behaviour and colony founding, that may help in deciding between alternative explanations for the occurrence of ergatoid queens in this species

Analysis of risk disclosure in Spanish firms

Treball final de Grau en Finances i Comptabilitat. Codi: FC1049. Curs acadèmic 2014-2015Despite the advantages of reporting on business risks and the existence of a growing demand for information, risk reporting within firms is still reduced. The present work describes briefly the main aspects related to the problematic of risk reporting and analyses the relation between corporate variables and risks disclosed by firms. Information on risks has been collected from the annual reports of 27 Spanish firms for the years 2009 and 2010. After different regression analysis to contrast hypothesis stated before, significant relations have been found out between risks disclosure and corporate variables such as profitability or level of risk

La enseñanza de las variedades del español

ENTREVISTA A MARÍA ANTONIETA ANDIÓN HERRER

Bully-victimization, depression, and school connectedness in early adolescent students

During early adolescence, schools play a significant role in the development of students. An issue that continues to be a serious concern for students, parents, teachers, and school officials in the U.S. and around the world is bullying. The primary purpose of this study was to examine school connectedness as a mediator between bully-victimization and depressive symptomatology in early adolescence. The secondary purpose of the study was to explore how gender and bullying classification groups (i.e., bully, victim, bully-victim, and non-involved) may relate to levels of reported school connectedness. The current study found low school connectedness partially mediated the relationship between bully victimization and depressive symptoms. Results also showed non-involved youth reported higher levels of school connectedness compared to bullies, victims, and bully-victim. The present study sought to expand literature of bullying, depression, and school connectedness in early adolescence with the aim of informing prevention, intervention and policy initiatives

El mundo rural en la Corona de Castilla en la Baja Edad Media: dinámicas socioeconómicas y nuevas perspectivas de análisis

The aim of this paper is to review the current interpretations of the late medieval economic growth in Castilian countryside in order to restore the peasants' role as economic agents. This involves a reassessment of the relationships between the peasants' economy and the market, together with a greater focus on the former's capacity in developing planned production strategies and on the overall implications in increasing labour productivity.El propósito de este artículo es cuestionar las interpretaciones vigentes sobre las implicaciones del ciclo de crecimiento económico del último medioevo en el mundo rural, restituyendo a los productores agrarios el papel de agentes. Para ello, se replantean las relaciones entre economía agraria y mercado y se destaca la capacidad campesina de desarrollar estrategias productivas planificadas y sus implicaciones en el incremento de la productividad

The road to gender equality in school education: The case of El Salvador (2016-2020)

The path taken by Salvadoran society to achieve gender equality in non-university education is undeniable. The implementation of numerous companies, the technical assistance of many countries, the collaboration of international institutions, and their financial support evidence, baking data extracted from the official censuses, that El Salvador is at the forefront of Hispanic Americans countries in equality policies. This article analyzes the data published by the entities working on gender equality and oficial agencies in El Salvador, for a present portrait and immediate future of gender equality policies in education. The "Human Capital" project 2016-2020, implemented by the Ministry of Education, and financial and technical assistance of the Millennium Challenge Corporation (MCC) will be further analyzedEl camino emprendido por la sociedad salvadoreña para conseguir la igualdad de género en la educación escolar, así como en la orientación académica y vocacional del alumnado, es innegable. La implementación de numerosas leyes, la ayuda técnica de numerosos organismos, la colaboración de instituciones internacionales, y el apoyo financiero de las mismas permiten decir, con apoyo en los datos extraídos de los censos oficiales, que El Salvador está en la vanguardia de los países hispanoamericanos en las políticas de igualdad de género en el ámbito de la educación. El presente artículo analiza los datos publicados por las entidades que trabajan en la igualdad de género en el Salvador, para hacer un retrato presente y de futuro inmediato de las políticas de igualdad de género en materia educativa. Se analizará más detenidamente el proyecto “Capital humano” 2016-2020, implementado por el Ministerio de Educación con la asistencia técnica y financiera de la Corporación Reto del Milenio (MCC) y se presentará a modo de conclusiones los aspectos que dificultan la puesta en práctica de la política de igualdad de género en la educación escola

Modeling Big Medical Survival Data Using Decision Tree Analysis with Apache Spark

In many medical studies, an outcome of interest is not only whether an event occurred, but when an event occurred; and an example of this is Alzheimer’s disease (AD). Identifying patients with Mild Cognitive Impairment (MCI) who are likely to develop Alzheimer’s disease (AD) is highly important for AD treatment. Previous studies suggest that not all MCI patients will convert to AD. Massive amounts of data from longitudinal and extensive studies on thousands of Alzheimer’s patients have been generated. Building a computational model that can predict conversion form MCI to AD can be highly beneficial for early intervention and treatment planning for AD. This work presents a big data model that contains machine-learning techniques to determine the level of AD in a participant and predict the time of conversion to AD. The proposed framework considers one of the widely used screening assessment for detecting cognitive impairment called Montreal Cognitive Assessment (MoCA). MoCA data set was collected from different centers and integrated into our large data framework storage using a Hadoop Data File System (HDFS); the data was then analyzed using an Apache Spark framework. The accuracy of the proposed framework was compared with a semi-parametric Cox survival analysis model