La termografía como herramienta de diagnóstico predictivo para los elementos eléctricos conectados a la red energía

Se estudiaron los principios de la termografía y propiedades térmicas que posee cada material para configurar correctamente la cámara térmica THERMOPRO TP8 e identificar problemas en diferentes elementos eléctricos que se encuentran en las redes de energía eléctrica de EDEQ (Empresa de energía del Quindío). Basados en la teoría de la termografía se realizó un diagnóstico de elementos eléctricos conectados y en funcionamiento en la red eléctrica y un análisis de cada imagen capturada. Para el análisis de las imágenes se utilizó el programa “Guide IrAnalyser” el cual lo incluye la cámara térmica THERMOPRO TP8, cada una de éstas imágenes tiene una serie de información que facilitó hacer un análisis cualitativo de algunos elementos eléctricos

Dark Matter Model Selection and the ATIC/PPB-BETS anomaly

We argue that we may be able to sort out dark matter models in which electrons are generated through the annihilation and/or decay of dark matter, by using a fact that the initial energy spectrum is reflected in the cosmic-ray electron flux observed at the Earth even after propagation through the galactic magnetic field. To illustrate our idea we focus on three representative initial spectra: (i)monochromatic (ii)flat and (iii)double-peak ones. We find that those three cases result in significantly different energy spectra, which may be probed by the Fermi satellite in operation or an up-coming cosmic-ray detector such as CALET.Comment: 19 pages, 8 figure

Do reading comprehension assessment tests result in the same reading profile? A study of Spanish primary school children

Background Detecting reading comprehension difficulties is challenging because many factors are involved in comprehension ability. Various reading comprehension tests can be used to detect difficulties but often do not yield the same results. Method Our aim was to analyse the agreement between three commonly used standardised reading comprehension tests (ECOMPLEC, ACL and PROLEC-R) in the detection of reading comprehension difficulties in Spanish. A total of 139 children (72 fifth graders and 67 sixth graders) at the same public-sector school participated in this study. The three reading comprehension tests were administered, together with word and nonword reading, vocabulary and nonverbal intelligence measures. Results Modest intercorrelations among the tests were found. The consistency of classification for each reading profile across the three reading comprehension tests was low. The results show different reading comprehension profiles depending on the test used. Conclusions It is important to use more than one instrument to diagnose reading comprehension difficulties, due to the complexity involved. Furthermore, knowledge of the characteristics of each reading comprehension test is essential to the choice of test. The educational implications of children being wrongly diagnosed are discussed

Music skills of Spanish-speaking children with developmental language disorder

Background: According to temporal sampling theory, deficits in rhythm processing contribute to both language and music difficulties in children with developmental language disorder (DLD). Evidence for this proposition is derived mainly from studies conducted in stress-timed languages, but the results may differ in languages with different rhythm features (e.g., syllable-timed languages).Aims: This research aimed to study a previously unexamined topic, namely, the music skills of children with DLD who speak Spanish (a syllable-timed language), and to analyze the possible relationships between the language and music skills of these children.Methods and Procedures: Two groups of 18 Spanish-speaking children with DLD and 19 typicallydeveloping peers matched for chronological age completed a set of language tests. Their rhythm discrimination, melody discrimination and music memory skills were also assessed. Outcomes and Results: Children with DLD exhibited significantly lower performance than their typically-developing peers on all three music subtests. Music and language skills were significantly related in both groups.Conclusions and Implications: The results suggest that similar music difficulties may be found in children with DLD whether they speak stress-timed or syllable-timed languages. The relationships found between music and language skills may pave the way for the design of possible language intervention programs based on music stimuli.Department of Developmental and Educational Psychology of UNE

Toksikološke metode otkrivanja opojnih droga u tragovima: kromatografska, spektroskopska i biološka karakterizacija derivata ecstasyja

Analysis often reveals variability in the composition of ecstasy pills from pure 3,4-methylenedioxymethamphetamine (MDMA) to mixtures of MDMA derivatives, amphetamine, and other unidentifi ed substances. For a comprehensive toxicological analysis one needs to know all steps to MDMA synthesis which may originate impurities. The aim of this study was to synthesise and determine the chemical-physical and in vitro biological properties of a series of MDMA derivatives. 3,4-methylendioxyphenyl-2-nitropropene (MDNP) was obtained by condensation of piperonal with an excess of nitroethane in the presence of ammonium acetate. MDNP was then reduced to methylenedioxyamphetamine (MDA) by LiAlH3. All compounds were analysed using HPLC and spectroscopic technique [Raman, nuclear magnetic resonance (NMR), or infrared (IR)] at all the steps of synthesis. In addition, we assessed the biological potentials of these compounds by measuring in vitro their (i) blood cell/whole blood partition coeffi cient, (ii) binding to plasmatic proteins (Fbp), and (iii) membrane adsorption. Chemical structure was determined with antibody fl uorescence polarisation immunoassay (FPIA). This study showed the presence of solid impurities, particularly of a neurotoxic compound of Al3+ in the fi nal products. FPIA identifi ed the aminoethane group close to the substituted benzene ring, but did not detect the two major precursors of MDMA: MDNP and piperonal. Raman spectroscopy is an attractive alternative technique to characterise ecstasy pills and it can identify stereoisomeric forms such as cis-MDNP and trans-MDNP, which exhibit signals at 1650 cm-1 and 1300 cm-1, respectively.Analize često otkriju neujednačenost sastava tableta ecstasyja od čistoga 3,4-metilendioksimetamfetamina (MDMA) do mješavina njegovih derivata, amfetamina i drugih neutvrđenih tvari. Stoga je za kvalitetnu toksikološku analizu potreban uvid u sve korake sinteze MDMA, s obzirom na to da se ondje vjerojatno kriju izvori nečistoće (prekursori, katalizatori). Cilj ovog ispitivanja bio je sintetizirati derivate MDMA te napraviti njihovu kemijsko-fi zikalnu i biološku in vitro karakterizaciju. 3,4-metilendioksifenil-2-nitropropen (MDNP) dobiven je kondenzacijom piperonala u suvišku nitroetana uz dodatak amonijeva acetata. Njegovom redukcijom s pomoću LiAlH3 dobiven je 3,4-metilendioksiamfetamin (MDA). Svi spojevi iz pojedinih koraka sinteze karakterizirani su s pomoću tekućinske kromatografi je visoke djelotvornosti (HPLC) i spektroskopskih tehnika [Ramanove spektroskopije, nuklearne magnetske rezonancije (NMR-a) te infracrvene spektroskopije (IR-a)]. Usto je ocijenjen i njihov biološki učinak in vitro mjerenjem (i) koefi cijenta raspodjele krvna stanica/puna krv, (ii) vezanja za bjelančevine u plazmi (Fbp) te (iii) adsorpcije na membranu. Kemijska je struktura utvrđena s pomoću fl uorescentnoga polarizacijskog imunokemijskog testa (FPIA). Analiza je u konačnim proizvodima utvrdila prisutnost krutih nečistoća, napose spojeva neurotoksičnog aluminija (Al3+). FPIA je prepoznao aminoetansku skupinu blizu supstituiranoga benzenskog prstena, ali ne i dva glavna prekursora za MDMA: MDNP i piperonal. Posebno je zanimljiva Ramanova spektroskopija budući da (i) pruža privlačnu alternativu za karakterizaciju sastava tableta ecstasyja te (ii) može otkriti stereoizomerne cis/trans-oblike spoja poput cis-MDNP-a odnosno trans-MDNP-a, čiji se signal vidi na 1650 cm-1 odnosno 1300 cm-1

Efecto de la metodología canvas para la innovación en modelos de negocio de la Mype formal de calzado de Trujillo, al año 2016.

La presente investigación se realizó con el objetivo de determinar el efecto de la metodología Canvas en la innovación de los modelos de negocio de la Mype formal de calzado de Trujillo, al año 2016. Esta investigación descriptiva, de diseño no experimental y corte transversal, fue aplicada a una población de dos Mypes de calzado trujillanas, con un muestreo por conveniencia, teniendo a la Innovación en Modelos de Negocio como única variable. Concluyendo que la metodología Canvas tiene un efecto medio con un puntaje de 3 en la escala valorativa, en la Mype Riberox que aplica factores de innovación; mientras que en la otra Mype, Grupo Romina, que no considera estos factores, tiene un efecto bajo, con un puntaje de 2, quedando así demostrado evidentemente en los resultados, que el efecto de la metodología Canvas en estas Mypes de calzado es positivo