Tecno-economía y gestión de recursos líticos en la industria finipaleolítica del Barranco Salao (Loporzano, Huesca)

This study presents the results of the research on the lithic materials collected over the years in the Barranco Salao area (Loporzano, Huesca). Despite not having found the exact location of the prehistoric site, the study of the raw materials and the lithic techno-typology allows to establish a clear pattern of supply and transformation of the siliceous varieties, related to the economic practices of the societies of the end of the Palaeolithic, with occasional presence of flint elements from more recent chronologies.Este estudio presenta los resultados de la investigación sobre los materiales líticos recopilados a lo largo de los años en el paraje del Barranco Salao (Loporzano, Huesca). A pesar de no haberse encontrado el lugar exacto de ubicación del yacimiento prehistórico, el estudio de las materias primas y de la tecno-tipología lítica permite establecer un claro patrón de aprovisionamiento y transformación de las variedades silíceas, relacionado con las prácticas económicas de las sociedades del final del Paleolítico, con presencia esporádica de elementos en sílex de cronologías más recientes

Tecno-economía y gestión de recursos líticos en la industria finipaleolítica del Barranco Salao (Loporzano, Huesca)

Este estudio presenta los resultados de la investigación sobre los materiales líticos recopilados a lo largo de los años en el paraje del Barranco Salao (Loporzano, Huesca). A pesar de no haberse encontrado el lugar exacto de ubicación del yacimiento prehistórico, el estudio de las materias primas y de la tecno-tipología lítica permite establecer un claro patrón de aprovisionamiento y transformación de las variedades silíceas, relacionado con las prácticas económicas de las sociedades del final del Paleolítico, con presencia esporádica de elementos en sílex de cronologías más recientes

Revisión de las propiedades psicométricas de las versiones larga y reducida de la Escala sobre Ideología de Género

La ideología de género es un constructo de gran relevancia en el análisis psicológico del género, que se ha mostrado relacionado con multitud de comportamientos, creencias y actitudes de hombres y de mujeres, especialmente con aquellos relacionados con la discriminación de género. Tras definir el constructo que se pretende medir, en este estudio instrumental se revisan los estudios realizados para la elaboración y evaluación de las propiedades psicométricas de las versiones larga y reducida de la Escala de Ideología de Género (EIG). Los estudios revisados muestran que: a) los valores del coeficiente alfa para ambas versiones varían entre 0,70 y 0,90; b) el patrón general de las medias de las puntuaciones totales se inclina hacia el polo igualitario de la escala; y c) las evidencias convergentes y discriminantes de las mediciones aportadas por ambas versiones de la EIG son coherentes con la teoría sobre el constructo. Por último, se apuntan futuras investigaciones sobre la estructura factorial de las escalas y la utilidad predictiva del constructo ideología de género.Gender ideology is a very important construct in the psychological study of gender. Research has shown that gender ideology is related to many behaviours, believes, and attitudes of men and women, specially with those related to gender discrimination. Firstly, the construct ‘gender identity’ is defined. Secondly, in this article studies conducted to elaborate and evaluate the psychometric properties of the long and the short versions of the Gender Ideology Scale are revised. Results of these instrumental studies show the following: a) alpha coefficients for both versions range from.70 to .90; b) the general pattern of total scores is biased toward the equalitarian pole of the scale; and c) convergent and discriminant evidences related to the use of both versions are consistent with the theory about gender ideology. Finally, future research about the scale factorial structure and the predictive utility of the construct gender ideology are suggested.A ideologia de género é um construto de grande relevância na análise psicológica do género, que se tem mostrado relacionado com uma variedade de comportamentos, crenças e atitudes de homens e mulheres, especialmente com aqueles relacionados com a discriminação de género. Depois de se definir o construto que se pretende medir, neste estudo instrumental revêem-se os estudos realizados para a elaboração e avaliação das propriedades psicométricas das versões larga e reduzida da Escala de Ideologia de Género (EIG). Os estudos revistos mostram que: a) os valores do coeficiente alfa para ambas as versões variam entre 0,70 e 0,90; b) o padrão geral das médias de pontuações totais inclina-se para o pólo igualitário da escala; e c) as evidências convergentes e discriminantes das medições fornecidas por ambas as versões da EIG são coerentes com a teoria sobre o construto. Por último, indicam-se futuras investigações sobre a estrutura factorial das escalas e a utilidade preditiva do construto ideologia de género.Este trabajo se ha realizado dentro del proyecto de investigación “Diferencias de poder y género: aspectos psicosociales” (Ministerio de Educación y Ciencia, referencia SEJ2004-02817/PSIC)

Educational Leadership Training, the Construction of Learning Communities. A Systematic Review

Instructional leadership notions and practices allow educators to engage in relevant roles within schools. Instead of implementing these concepts in professional programs, Mexican and Spanish education systems still preserve a “technically oriented” training model that separates educational and professional aims. Diverse studies have identified the benefits of implementing instructional leadership orientations within “Educational cooperation”, “Cooperative education”, “Team teaching” and “Teacher leadership” at schools. This systematic review conducted usingWeb of Science—contributes by organizing the produced knowledge and identifies the main findings reported by the academic literature on this topic. It seeks to answer the following questions: (1) What are the contributions of this research to the education systems examined? (2) What kind of knowledge about educational leadership and professional learning communities can be inferred from them? Results from the majority of studies found that instructional leadership offers a useful tool to promote shared responsibility between teachers and head teachers and supports professional learning communities. A main conclusions of the present study is that it highlights the importance of bypassing existing bureaucratic practices within schools in order to replace the traditional “technical orientation” of training programs. Instructional leadership may facilitate some of the required transformations in the context of global educational reform

2007-2017: Una década de competencias clave en España

The aim of this study was to determine Spanish teachers’ perceptions about the competence-based curriculum model (CBCM) introduced by LOE (2006) and maintained by later legislation, ten years after its deployment. Participants were 1408 Spanish Primary and Secondary School teachers (719 women and 689 men). Participants answered an ad hoc questionnaire consisting of a 23-item, five-factor scale (beliefs about the theoretical model, level of implementation of the model, difficulties in implementing the model, resources, and professional development). The questionnaire was sent through an on-line application to all Spanish Primary and Secondary Schools. The results show that teachers perceive the importance of curricular change although their expectations are negative regarding its implementation in classrooms. They are committed to the application of the CBCM but there is still a great demand for training and contextual conditions need to be improved. Regarding the factors analyzed, women have a better consideration of the degree of application of teaching strategies or the uniformity in the implementation of CBCM, while men score significantly higher in available resources. Primary school teachers have a more favorable perception in most of the items than secondary school teachers. It is necessary to address all these difficulties observed by teachers if educational reforms are intended to have a real impact on the results of the educational processEl objetivo de esta investigación fue conocer las percepciones del profesorado español sobre el modelo de currículo basado en competencias (MCC) introducido por la LOE (2006) y mantenido por legislaciones posteriores, diez años después de su implantación. Un total de 1408 docentes (719 mujeres y 689 varones). Los participantes contestaron un cuestionario diseñado ad hoc, consistente en una escala de cinco factores (creencias sobre el modelo teórico; grado de aplicación del modelo; dificultades para la aplicación del modelo; recursos; y formación del profesorado) con 23 ítems. El cuestionario fue enviado mediante una aplicación on-line a todos los centros españoles. Los resultados obtenidos muestran que los docentes perciben la importancia del cambio curricular, aunque sus expectativas son negativas respecto a su aplicación en las aulas; están implicados en la aplicación del MCC; sigue existiendo una gran demanda de formación; y es necesario que mejoren las condiciones contextuales. En cuanto a los factores analizados, las mujeres tienen mejor consideración del grado de aplicación de estrategias didácticas o la uniformidad en la implementación del MCC, mientras que los hombres puntúan significativamente más alto en los recursos disponibles; los docentes de Educación Primaria tienen una percepción más favorable en la mayoría de los ítems que los docentes de Educación Secundaria; las diferencias entre docentes de las diferentes áreas de conocimiento no son relevantes. Es necesario atender a todas estas dificultades observadas por el profesorado, si se pretende que este tipo de reformas educativas tengan un impacto real sobre los resultados del proceso educativoS

Increasing control improves further control, but it does not enhance memory for the targets in a face–word Stroop task

Recent research on the dynamics between attentional and memory processes have outlined the idea that applying control in a conflicting situation directly leads to enhanced episodic memory of the processed information. However, in spite of a small subset of studies supporting this claim, the majority of the evidence in the field seems to support the opposite pattern. In this study, we used a face–word Stroop task to enforce different control modes either from trial to trial or in an item-specific manner. Both manipulations of congruency proved to be effective in making participants’ responses to conflicting stimuli more efficient over time by applying a trial-specific control mode. However, these manipulations had no impact on memory performance on a surprise recognition memory test. To our knowledge, this is the first attempt at measuring the memory consequences of the application of specific control modes at the trial level. The results reported here call for caution and possibly reconceptualization of the relationship between cognitive control and memory. Pursuing unusual goals (e.g., throwing a new sequence of punches when boxing or including new moves in your tango sequence) is more demanding than performing comparatively more habitual goals (e.g., sticking to your old moves in both scenarios) because to reach infrequent goals, performers have to take every step required to accomplish such goals and also prevent the potential intrusion coming from more habitual actions performed in those contexts. The processes recruited to overcome the conflict between alternative action courses are collectively referred to as “cognitive control,” and they have been explored systematically by means of interference lab tasks such as Stroop (MacLeod, 1992; Stroop, 1935), flanker (Eriksen & Eriksen, 1974), or Simon (Simon & Berbaum, 1990) tasks. For instance, in a Stroop task, if a participant is told to respond to a word denoting a color by referring to the color in which it is printed, its semantic content leads to an interference that is measured as the difference in reaction times between the conditions in which both features are congruent or incongruent with each other. One important result from the literature on cognitive control is that the efficiency of control processes is not invariant, but is rather subject to systematic changes. Thus, the effect of congruency decreases immediately after responding to an incongruent trial (i.e., the congruency sequence effect, or CSE; Gratton, Coles, & Donchin, 1992), or after responding to a large proportion of incongruent trials over a given block (i.e., list-wide proportion congruency effect, or LWPCE; Logan & Zbrodoff, 1979), a specific context (context-specific proportion congruency effect, or CSPCE; Crump, Gong, & Milliken, 2006), or even for a specific item (item-specific proportion congruency effect, or ISPCE; Jacoby, Lindsay, & Hessels, 2003). Thus, it appears that the efficiency of cognitive control becomes finely attuned to the previous experience, and it improves precisely in those conditions in which it becomes challengedThe present research was funded by the Spanish Ministerio de Economía y Competitividad with a research grant to Luis Jiménez (PSI2015-70990-P). Open Access funding provided by Projekt DEALS

Combined Influence of Absorptive Capacity and Corporate Entrepreneurship on Performance

Drawing on a dynamic capabilities perspective and a resource-based view, this article analyzes the relationship between absorptive capacity and corporate entrepreneurship, and their combined effect on organizations’ performance. It contributes to the literature by dissociating the dimensions of absorptive capacity (potential and realized) and corporate entrepreneurship (innovativeness, proactiveness, new business venturing, and self-renewal). A quantitative study was performed with data gathered by personal interviews, using a structured questionnaire. The theoretical model was estimated through a structural equation model, using a sample of 168 Spanish firms. The results show that proactiveness positively influences innovativeness and that both proactiveness and innovativeness have a positive influence on potential and realized absorptive capacity. A significant positive relationship also exists between potential and realized absorptive capacity. Furthermore, realized absorptive capacity positively influences new business venturing and self-renewal. Finally, proactiveness and new business venturing directly and positively influence organizational performance, but not innovativeness and self-renewal. The study demonstrates that entrepreneurs must be able to enhance potential and realize absorptive capacities at the same time in order to improve the end performance of their corporate entrepreneurial projects. Both absorptive capacities are strongly related to corporate entrepreneurial activities and have a strong influence on firms’ performance.This work was supported by the Ministry of Science and Innovation under Grant ECO2013-47027-P and ECO2017-88222-P; the Regional Government of Andalusia under Grant P11-SEJ-7294 and P11-SEJ-7988 and the European Union (FEDER Funds)

Capacidad de absorción del conocimiento: medición.

La capacidad de absorber el conocimiento es una de las capacidades más importantes que las empresas habrán de desarrollar si desean conseguir y sostener una ventaja competitiva. Bajo la perspectiva de la Teoría de Recursos y Capacidades, en el presente artículo ofreceremos un instrumento de medida alternativo de la capacidad de absorción que diferencie entre las fases de adquisición, asimilación, transformación y explotación del conocimiento, así como entre sus dos dimensiones, potencial y realizada, con la finalidad de reducir el problema de medición y de identificación de las dimensiones que conforman tan importante constructo.Resource-based theory; Potential and realized absorptive capacity; Assessment instrument;

Experimental study on the motion of solids around an isolated bubble rising in a vertically vibrated fluidized bed

The motion of solids around isolated bubbles rising in a vertically vibrated pseudo-2D bed is experimentally studied in this work by combining Digital Image Analysis (DIA) and Particle Image Velocimetry (PIV). The bed material is Geldart B spherical particles. Different vibration amplitudes and frequencies are applied to the bed vessel while the bed is fluidized with air at minimum fludization conditions and isolated bubbles are sequentially injected in the bed. An averaging of bubbles method is presented and used to statistically characterize the average motion of solids around the bubbles. The results show that the presence of a bubble in the system perturbs the cyclic compression and expansion behavior of the bed bulk and, in particular, influences the velocity of the expansion wave front traveling upwards the bed. Analogously, the motion of solids around the bubble and, specially, in the bubble wake region, are strongly affected by the cyclic compression and expansion of the bed bulk. However, direct comparisons of the experimental results with the Davidson & Harrison potential flow model reveal that this model is still applicable for the prediction of the solids velocity around the bubble in a vertically vibrated fluidized bed

Advances in the Treatment of Postsurgical Benign Colorectal Strictures

Postsurgical benign colorectal strictures occur in up to 20% of patients who undergo colon or rectal resection. Traditionally, treatment has been surgical, but recent decades have seen the growing importance of an endoscopic approach, particularly balloon dilatation, which is now considered the first-line treatment for these benign strictures. However, balloon dilatation is associated with a recurrence of the stricture in up to 25% of cases. When this arises, one can opt for surgery aimed at performing a reanastomosis; a new intestinal anastomosis may be technically complex or even impossible, which would result in the patient requiring a permanent colostomy, with its consequent negative impact on quality of life. Accordingly, different endoscopic approaches have been evaluated for strictures refractory to balloon dilatation, such as the implant of self-expanding metallic stents, biodegradable stents, or incisional therapy, with variable results in efficacy