2,433 research outputs found
Orientadores escolares: importancia de la dimensión personal y participativa en las competencias actitudinales
ABSTRACTIntroduction: The current model of indirect intervention about educational guidance, based on collaborative consultation and theoretically grounded in the principles of prevention, intervention and social development, is an unquestionable quality factor in education systems. Method: The aim of this study is to understand the degree of importance that attitudinal competences hold for an effective performance by school counselors in Education Schools of Galicia. In order to measure attitudinal competences it was used the questionnaire Analysis of professional competences of school counselors. Results: The results of the investigation confirm that counselors consider attitudinal competences very important (69.1%), those with the highest rating (percentages over 75%) are those referring to “knowing how to act” (participative dimension) in contrast to a worse assessment (percentages under 55%) of those referring to “knowing how to be” (personal dimension). Principal components analysis followed by varimax rotation indicated two factors jointly accounting for 61.2% of total variance, one associated with actions involving modification of syllabuses, and the other with actions not requiring such changes. Cronbach's alphas were .94 and.80 for the two factors. Finally, the confirmatory factor analysis (CFA) holds that hypothesized model appears to be an acceptable fit of data. Conclusions: This study, beyond lending productionof knowledge to the field of educational and vocational guidance, is a headway to favor the acquisition of attitudinal competences in counseling training, contributing to the strengthening of counseling services in terms of quality and excellence. RESUMENIntroducción: El modelo actual de intervención indirecta de la orientación educativa, basado en la consulta colaborativa y fundamentado teóricamente en los principios de prevención, desarrollo e intervención social, constituye un factor de calidad indiscutible en los sistemas educativos. Método: El objetivo de este estudio conocer el grado de importancia de las competencias actitudinales en el desempeño eficaz de las funciones de los orientadores escolares en los centros educativos de Galicia. Para medir las competencias actitudinales se aplicó el cuestionario Análisis de las competencias profesionales de los orientadores escolares. Resultados: Los resultados de la investigación confirman que los orientadores consideran muy importantes las competencias actitudinales (69.1%), siendo mejor valoradas (porcentajes superiores al 75%) las que hacen referencia al “saber estar” (dimensión participativa) frente a una peor valoración (porcentajes por debajo del 55%) de las referidas al “saber ser” (dimensión personal). El análisis factorial a través de los componentes principales con rotación varimax configura dos factores que explican el 61.2% de la varianza de los datos, asociado uno con acciones que implican modificación de programas, y otro con acciones que no requieren tales cambios. Las alphas de Cronbach son de .94 y .80 para los dos factores. Finalmente, el análisis factorial confirmatorio (AFC) sostiene que el modelo hipotetizado tiene un aceptable ajuste a los datos. Conclusiones: El presente estudio, más allá de contribuir con la producción de conocimientos en el área de la orientación educativa y profesional, es un avance para favorecer la adquisición de competencias actitudinales en la formación orientadora, contribuyendo al fortalecimiento de los servicios de orientación en términos de calidad y excelencia.ABSTRACTIntroduction: The current model of indirect intervention about educational guidance, based on collaborative consultation and theoretically grounded in the principles of prevention, intervention and social development, is an unquestionable quality factor in education systems. Method: The aim of this study is to understand the degree of importance that attitudinal competences hold for an effective performance by school counselors in Education Schools of Galicia. In order to measure attitudinal competences it was used the questionnaire Analysis of professional competences of school counselors. Results: The results of the investigation confirm that counselors consider attitudinal competences very important (69.1%), those with the highest rating (percentages over 75%) are those referring to “knowing how to act” (participative dimension) in contrast to a worse assessment (percentages under 55%) of those referring to “knowing how to be” (personal dimension). Principal components analysis followed by varimax rotation indicated two factors jointly accounting for 61.2% of total variance, one associated with actions involving modification of syllabuses, and the other with actions not requiring such changes. Cronbach's alphas were .94 and.80 for the two factors. Finally, the confirmatory factor analysis (CFA) holds that hypothesized model appears to be an acceptable fit of data. Conclusions: This study, beyond lending productionof knowledge to the field of educational and vocational guidance, is a headway to favor the acquisition of attitudinal competences in counseling training, contributing to the strengthening of counseling services in terms of quality and excellence.
Evaluación de impacto ambiental de Galicia
Este libro recolle as sesións correspondentes o módulo avaliación do impacto ambiental do Master de Ciencia e Tecnoloxía Ambiental, dirixido polo profesor D. Xosé Luis Armesto Barbeito que se desenvolbe desde 1992 na Facultarle de Ciencia
Conflictos
Las disputas por el agua , podrían agravarse en aquellas zonas con alto crecimiento demográfico y densidad poblacional. en tal sentido, la Organización Mundial de la Salud (OMS) en su informe correspondiente al año 2010 reportó la muerte de cinco millones de personas a causa de enfermedades hidrotransmitidas y severamente sobre-explotados (CONAGUA, 2010).en el mundo, los conflictos por la administración; abastecimiento, consumo, reutilización y reciclaje de agua se han concentrado en África, Europa y América (Aquastat, 2010). En el norte del continente americano, los conflictos se han intensificado en la frontera entre México y Estados Unidos de América dada la situación de escasez y sequias prolongadas registradas en los últimos 25 años (ONU, 2010).Universidad Autónoma del Estado de México, Unidad Académica Profesional Chimalhuacá
Performance assessment of time–frequency RFI mitigation techniques in microwave radiometry
©2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Radio–frequency interference (RFI) signals are a well-known threat for microwave radiometry (MWR) applications. In order to alleviate this problem, different approaches for RFI detection and mitigation are currently under development. Since RFI signals are man made, they tend to have their power more concentrated in the time–frequency (TF) space as compared to naturally emitted noise. The aim of this paper is to perform an assessment of different TF RFI mitigation techniques in terms of probability of detection, resolution loss (RL), and mitigation performance. In this assessment, six different kinds of RFI signals have been considered: a glitch, a burst of pulses, a wide-band chirp, a narrow-band chirp, a continuous wave, and a wide-band modulation. The results show that the best performance occurs when the transform basis has a similar shape as compared to the RFI signal. For the best case performance, the maximum residual RFI temperature is 14.8 K, and the worst RL is 8.4%. Moreover, the multiresolution Fourier transform technique appears as a good tradeoff solution among all other techniques since it can mitigate all RFI signals under evaluation with a maximum residual RFI temperature of 21 K, and a worst RL of 26.3%. Although the obtained results are still far from an acceptable bias Misplaced < 1 K for MWR applications, there is still work to do in a combined test using the information gathered simultaneously by all mitigation techniques, which could improve the overall performance of RFI mitigation.Peer ReviewedPostprint (author's final draft
Cross-talk statistics and impact in interferometric GNSS-R
©2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.This paper presents a statistical analysis of the crosstalk phenomenon in interferometric Global Navigation Satellite Systems Reflectometry (iGNSS-R). Crosstalk occurs when the Delay-Doppler Map (DDM) of a tracked satellite overlaps others fromundesired satellites. This study is performed for ground-based and airborne receivers and for a receiver onboard the International Space Station (ISS) such as the upcoming GNSS Reflectometry, Radio Occultation and Scatterometry onboard ISS experiment. Its impact on ocean altimetry retrievals is analyzed for different antenna arrays. Results show that for elevation angles higher than 60 degrees, crosstalk can be almost permanent from ground, up to 61% from airborne receivers at 2-km height, and up to similar to 10% at the ISS. Crosstalk can only be mitigated using highly directive antennas with narrow beamwidths. Crosstalk impact using a seven-element hexagonal array still induces large errors on ground, but reduces to centimeter level on airborne receivers, and is negligible from the ISS.Peer ReviewedPostprint (author's final draft
SNR degradation in GNSS-R measurements under the effects of radio-frequency interference
©2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Radio-frequency interference (RFI) is a serious threat for systems working with low power signals such as those coming from the global navigation satellite systems (GNSS). The spectral separation coefficient (SSC) is the standard figure of merit to evaluate the signal-to-noise ratio (SNR) degradation due to the RFI. However, an in-depth assessment in the field of GNSS-Reflectometry (GNSS-R) has not been performed yet, and particularly, about which is the influence of the RFI on the so-called delay-Doppler map (DDM). This paper develops a model that evaluates the contribution of intra-/inter-GNSS and external RFI effects to the degradation of the SNR in the DDM for both conventional and interferometric GNSS-R techniques. Moreover, a generalized SSC is defined to account for the effects of nonstationary RFI signals. The results show that highly directive antennas are necessary to avoid interference from other GNSS satellites, whereas mitigation techniques are essential to keep GNSS-R instruments working under external RFI degradation.Peer ReviewedPostprint (author's final draft
Changes in plasma biochemistry and body mass during incubation in the Yellow-legged Gull
The >Incubatory Reserves Constancy> hypothesis asserts that incubation could be a departure from breeding stress that allows for the maintenance or recovery of body reserves after laying effort (females) or territory defense (males) in those species with bi-parental incubation such as gulls. The plasma composition and body mass of incubating Yellow-legged Gulls (Larus cachinnans) were analyzed and related to the number of days after egg-laying. Female gulls showed an increase in uric acid and cholesterol levels, whereas males showed only an increase in uric acid values throughout this period. Moreover, females increased while males maintained their body masses. These results could reflect a recovery process after the laying effort supporting the Incubatory Reserves Constancy hypothesis in females. Uric acid and urea levels are positively correlated to body condition in Yellow-legged Gulls, which could be the result of a change in diet composition. This disagrees with recent findings on body composition in incubating gulls and could be related to variations in food availability among populations or years, and could reflect flexibility in the investment devoted by each sex.Peer Reviewe
Mode testing, critical bandwidth and excess mass
This is a post-peer-review, pre-copyedit version of an article published in TEST. The final authenticated version is available online at: https://doi.org/10.1007/s11749-018-0611-5The identification of peaks or maxima in probability densities, by mode testing or bump hunting, has become an important problem in applied fields. For real random variables, this task has been approached in the statistical literature from different perspectives, with the proposal of testing procedures which are based on kernel density estimators or on the quantification of excess mass. However, none of the existing proposals for testing the number of modes provides a satisfactory performance in practice. In this work, a new procedure which combines the previous approaches (smoothing and excess mass) is presented together with a revision on the previous proposals. The new method is compared with the existing ones in an extensive simulation study, showing a superior behaviour, with good calibration and power results. Theoretical justification for its performance is also obtained. A real data example on philatelic data is also included for illustration purposes, revising previous approaches and discussing the results with the new procedureThe authors gratefully acknowledge the support of Projects MTM2016-76969-P (Spanish State Research Agency, AEI) and MTM2013-41383-P (Spanish Ministry of Economy, Industry and Competitiveness), both co-funded by the European Regional Development Fund (ERDF), IAP network from Belgian Science Policy. Work of J. Ameijeiras-Alonso has been supported by the Ph.D. Grant BES-2014-071006 from the Spanish Ministry of Economy, Industry and CompetitivenessS
Síndrome d'Acumulació Compulsiva: "M'ho guardo. No sigui cas que..."
El 50% de les persones que pateixen aquesta síndrome no presenten un quadre de Transtorn Obsessiu Compulsiu. Una dada clau per entendre més a fons una variant poc estudiada i que cal diferenciar de la síndrome de Diògenes. Es tracta de persones de qualsevol edat, majoritàriament dones, que els resulta difícil desprendre's d'objectes sense valor i amb els que, en gran part dels casos, estableixen un vincle emocional. Una situació que deriva en espais inhabitables de la llar i condiciona el dia a dia del pacient. El següent estudi, encapçalat pel Departament de Psiquiatria de l'Hospital de Bellvitge, i amb la col·laboració de l'Institute of Psychiatry de Londres, obre el camí per continuar investigant. De moment, el mes d'octubre passat, l'article va ser publicat a la revista American Journal of Psychiatry.El 50% de las personas que sufren este síndrome no presentan un cuadro de Trastorno Obsesivo Compulsivo. Un dato clave para entender más a fondo una variante poco estudiada y que hay que diferenciar del síndrome de Diógenes. Se trata de personas de cualquier edad, mayoritariamente mujeres, que les resulta difícil desprenderse de objetos sin valor y con los que, en gran parte de los casos, establecen un vínculo emocional. Una situación que deriva en espacios inhabitables del hogar y condiciona el día a día del paciente. El siguiente estudio, encabezando por el Departamento de Psiquiatría del Hospital de Bellvitge, y con la colaboración de l'Institute of Psychiatry de Londres, abre el camino para continuar investigando. De momento, el pasado mes de octubre, el artículo fue publicado en la revista American Journal of Psychiatry
Production of saccharides from sugar beet pulp by ultrafast hydrolysis in supercritical water
Producción CientíficaSugar beet pulp (SBP) is the major by-product in sugar industry. To make profit out of this undervalued residue, the FASTSUGARS process was proposed as a solution, combining the advantages of supercritical water as hydrolysis medium with very short reaction times in the so-called ultrafast reactors. Operating at 390 °C, 25 MPa and reaction times between 0.11 and 1.15 s it was possible to convert SBP into sugars and to obtain a lignin-like solid fraction. The highest yields of C-6 and C-5 sugars (61 and 71% w/w, respectively) were obtained at 0.11 s with the lowest yield of degradation products. The solid product obtained at 0.14 s was thoroughly analyzed by acid hydrolysis, TGA and FTIR analysis to prove its enhanced thermal properties and aromaticity. The FASTSUGARS process demonstrated being a versatile and promising technology to be integrated in the future biorefineries.Ministerio de Economía, Industria y Competitividad (Project CTQ2013-44143-R and CTQ2016-79777-R
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