Neuropsychological assessment of the decision making process in children and adolescents: an integrative review of the literature

OBJETIVO: Atualmente, tem havido um interesse crescente nos aspectos "quentes" das funções executivas relacionados ao córtex orbitofrontal, em particular na tomada de decisão afetiva em crianças e adolescentes. Revisamos a literatura sobre a avaliação da tomada de decisão em crianças e adolescentes utilizando o paradigma do Iowa Gambling Task e derivados. MÉTODO: Pesquisamos artigos publicados de 2000 a 2009, indexados no Lilacs e no PubMed e que estudaram crianças e/ou adolescentes até 16 anos. Os artigos foram analisados de acordo com os paradigmas utilizados nos estudos, as conclusões sobre o desenvolvimento no processo de tomada de decisão e a capacidade de distinção entre a população clínica e os controles. RESULTADOS: Trinta e seis artigos foram selecionados. Os estudos envolvendo crianças e adolescentes ainda são poucos quando comparados àqueles realizados com população adulta. Foram desenvolvidas diversas versões derivadas do paradigma IGT a fim de estudar a tomada de decisão em crianças e adolescentes. CONCLUSÃO: O IGT é o instrumento mais utilizado. Em pré-escolares, versões simplificadas têm sido utilizadas com maior frequência. Os diferentes paradigmas se mostram úteis na diferenciação entre sujeitos normais e com transtornos psiquiátricos. Os resultados se relacionam de forma positiva e significativa com a frequência de comportamentos impulsivos em populações não clínicas.OBJECTIVE: Nowadays there has been growing interest in the "hot" aspects of the executive functions related to the orbitofrontal cortex (OFC), in particular in the affective decision-making process in children and adolescents. We reviewed the available literature about the evaluation of decision making in children and adolescents. METHOD: We searched for papers published from 2000 to 2009 that studied children and/or adolescents until the age of 16 in the Lilacs and PubMed index. The papers were analyzed according to the paradigms used in the studies, the conclusions about the development of the decision-making process, and the ability to distinguish between the clinical population and the controls. RESULTS: Thirty-six papers were selected. Compared to the amount of studies of adults, there are still few studies focusing on children and adolescents. Several versions derived from the IGT were developed in order to study decision-making processes in children and adolescents. DISCUSSION: The IGT is the most used instrument. In preschoolers, simplified versions have been used with greater frequency. The different paradigms are useful in differentiating between normal and psychiatric disorder patients. The results are positively and significantly related to the frequency of impulsive behaviors in nonclinical populations

Un modelo exploratorio de la intención de continuar estudiando en alumnos universitarios no-tradicionales

Background: Although academic achievement is believed to be an important factor in students’ decision to continue studying at university, research on this topic is limited. Method: The current study analyzed the relationship between academic achievement and the intention of 327 non-traditional students to continue studying at university, using a path model. Results: The central hypothesis of the study was confi rmed, as the intention to continue studying was determined by previous academic results, although the amount of variance explained was relatively low (13%). Conclusions: The results from this study indicate that the intention to continue studying at university depends less than expected on the performance achieved. So, universities should consider other variables such as the quality of the academic support offered to these students continue their studies.Antecedentes: a pesar de la importancia que se atribuye al rendimiento académico en la toma de decisión de los alumnos mayores de 25 años sobre si continuar o no sus estudios en la Universidad, la investigación sobre este tópico es limitada. Método: se analizó la relación entre el rendimiento académico y la intención de 327 alumnos no-tradicionales de continuar sus estudios en la Universidad mediante el ajuste de un modelo de relaciones causales. Resultados: la hipótesis central del estudio fue confi rmada en la medida en que la intención de continuar con los estudios resultó determinada por los resultados académicos previos, aunque la cantidad de varianza explicada fue relativamente escasa (un 13%). Conclusiones: de los resultados obtenidos en este estudio se concluyó que la intención de continuar en la Universidad depende menos de lo que se cree del rendimiento logrado, por lo que las universidades deberán dirigir su mirada también a otras variables como, por ejemplo, la calidad del apoyo que estos estudiantes reciben para continuar sus estudios

Synthesis of polyols of different lignocellulosic residues to obtain greener products.

216 p.Diferentes residuos lignocelulósicos, fueron convertidos en polioles usando alcoholes poli hídricos como disolventes. Mediante un diseño experimental se determinaron las condiciones óptimas de los polioles. Los distintos polioles fueron caracterizados y usados para sustituir parcialmente el fenol en las formulaciones de resinas fenólicas. Por último, las resinas fueran caracterizadas y evaluadas como adhesivo para tableros de madera.Los resultados obtenidos demuestran que los polioles pueden sustituir parte del fenol en las formulaciones de resinas resoles. Los adhesivos fenólicos presentaron buenas propiedades mecánicas

Synthesis of polyols of different lignocellulosic residues to obtain greener products.

216 p.Diferentes residuos lignocelulósicos, fueron convertidos en polioles usando alcoholes poli hídricos como disolventes. Mediante un diseño experimental se determinaron las condiciones óptimas de los polioles. Los distintos polioles fueron caracterizados y usados para sustituir parcialmente el fenol en las formulaciones de resinas fenólicas. Por último, las resinas fueran caracterizadas y evaluadas como adhesivo para tableros de madera.Los resultados obtenidos demuestran que los polioles pueden sustituir parte del fenol en las formulaciones de resinas resoles. Los adhesivos fenólicos presentaron buenas propiedades mecánicas

Influence of the adhesive strategy in the sealing ability of resin composite inlays after deep margin elevation

The aim of this study was to determine the influence of the gingival margin position and the adhesive strategy selected to perform deep margin elevation (DME) in marginal sealing of resin composite inlays by a nanoleakage test. 12 sound third molars wer

Atypical Mg-poor Milky Way Field Stars with Globular Cluster Second-generation-like Chemical Patterns

We report the peculiar chemical abundance patterns of 11 atypical Milky Way (MW) field red giant stars observed by the Apache Point Observatory Galactic Evolution Experiment (APOGEE). These atypical giants exhibit strong Al and N enhancements accompanied by C and Mg depletions, strikingly similar to those observed in the so-called second-generation (SG) stars of globular clusters (GCs). Remarkably, we find low Mg abundances ([Mg/Fe] < 0.0) together with strong Al and N overabundances in the majority (5/7) of the metal-rich ([Fe/H] gsim −1.0) sample stars, which is at odds with actual observations of SG stars in Galactic GCs of similar metallicities. This chemical pattern is unique and unprecedented among MW stars, posing urgent questions about its origin. These atypical stars could be former SG stars of dissolved GCs formed with intrinsically lower abundances of Mg and enriched Al (subsequently self-polluted by massive AGB stars) or the result of exotic binary systems. We speculate that the stars Mg-deficiency as well as the orbital properties suggest that they could have an extragalactic origin. This discovery should guide future dedicated spectroscopic searches of atypical stellar chemical patterns in our Galaxy, a fundamental step forward to understanding the Galactic formation and evolution

Innovation Practices in Emerging Economies: Do University Partnerships Matter?

Enterprises’ resources and capabilities determine their ability to achieve competitive advantage. In this regard, the key innovation challenges that enterprises face are liabilities associated with their age and size, and the entry barriers imposed on them. In this line, a growing number of enterprises are starting to implement innovation practices in which they employ both internal/external flows of knowledge in order to explore/exploit innovation in collaboration with commercial or scientific agents. Within this context, universities play a significant role providing fertile knowledge-intensive environments to support the exploration and exploitation of innovative and entrepreneurial ideas, especially in emerging economies, where governments have created subsidies to promote enterprise innovation through compulsory university partnerships. Based on these ideas, the purpose of this exploratory research is to provide a better understanding about the role of universities on enterprises’ innovation practices in emerging economies. More concretely, in the context of Mexico, we explored the enterprises’ motivations to collaborate with universities in terms of innovation purposes (exploration and exploitation) or alternatives to access to public funds (compulsory requirement of being involved in a university partnership). Using a sample of 10,167 Mexican enterprises in the 2012 Research and Technological Development Survey collected by the Mexican National Institute of Statistics and Geography, we tested a multinomial regression model. Our results provide insights about the relevant role of universities inside enterprises’ exploratory innovation practices, as well as, in the access of R&D research subsidies

Effect of supplementary physical training on vertical jump height in professional ballet dancers

Dancers require many specific dance skills of a ballistic nature. The design of supplementary training to improve the strength of the lower limbs and jump height is a relevant area of research. The purpose of this study was (1) to compare the effect of plyometric training versus combined training on countermovement jump (CMJ), squat jump (SJ), and sauté in first position (sauté) height and (2) to observe whether changes in CMJ and SJ were associated with changes in sauté in female and male dancers. Eighty-one classical professional ballet dancers (41 women and 40 men, age = 22.9 [3.7] y, body mass = 59.7 [8.6] kg, height = 167.4 [7.3] cm) were divided into a control group and 2 experimental groups: plyometric training and combined training. All groups followed their common routine of training regarding classes and rehearsal practice, whereas the experimental groups added 2 sessions (1 h per session) for 9 weeks of supplementary training. Significant increases (medium to large effect size) in CMJ, SJ, and sauté height were found in the pretest versus posttest comparisons for both experimental groups. Significant, very large correlations were found between the magnitude of improvement in sauté and the magnitude of improvement in CMJ and SJ. Plyometric and combined training programs are effective ways to improve jumping ability in professional dancers. The improvement in CMJ and SJ has a good transference on sauté `performance. These findings support the use of traditional training methods to improve jump height in specific and nonspecific ballet jumping ability

Evaluation of bleach-sedimentation for sterilising and concentrating Mycobacterium tuberculosis in sputum specimens

RIGHTS : This article is licensed under the BioMed Central licence at http://www.biomedcentral.com/about/license which is similar to the 'Creative Commons Attribution Licence'. In brief you may : copy, distribute, and display the work; make derivative works; or make commercial use of the work - under the following conditions: the original author must be given credit; for any reuse or distribution, it must be made clear to others what the license terms of this work are.Abstract Background Bleach-sedimentation may improve microscopy for diagnosing tuberculosis by sterilising sputum and concentrating Mycobacterium tuberculosis. We studied gravity bleach-sedimentation effects on safety, sensitivity, speed and reliability of smear-microscopy. Methods This blinded, controlled study used sputum specimens (n = 72) from tuberculosis patients. Bleach concentrations and exposure times required to sterilise sputum (n = 31) were determined. In the light of these results, the performance of 5 gravity bleach-sedimentation techniques that sterilise sputum specimens (n = 16) were compared. The best-performing of these bleach-sedimentation techniques involved adding 1 volume of 5% bleach to 1 volume of sputum, shaking for 10-minutes, diluting in 8 volumes distilled water and sedimenting overnight before microscopy. This technique was further evaluated by comparing numbers of visible acid-fast bacilli, slide-reading speed and reliability for triplicate smears before versus after bleach-sedimentation of sputum specimens (n = 25). Triplicate smears were made to increase precision and were stained using the Ziehl-Neelsen method. Results M. tuberculosis in sputum was successfully sterilised by adding equal volumes of 15% bleach for 1-minute, 6% for 5-minutes or 3% for 20-minutes. Bleach-sedimentation significantly decreased the number of acid-fast bacilli visualised compared with conventional smears (geometric mean of acid-fast bacilli per 100 microscopy fields 166, 95%CI 68-406, versus 346, 95%CI 139-862, respectively; p = 0.02). Bleach-sedimentation diluted paucibacillary specimens less than specimens with higher concentrations of visible acid-fast bacilli (p = 0.02). Smears made from bleach-sedimented sputum were read more rapidly than conventional smears (9.6 versus 11.2 minutes, respectively, p = 0.03). Counting conventional acid-fast bacilli had high reliability (inter-observer agreement, r = 0.991) that was significantly reduced (p = 0.03) by bleach-sedimentation (to r = 0.707) because occasional strongly positive bleach-sedimented smears were misread as negative. Conclusions Gravity bleach-sedimentation improved laboratory safety by sterilising sputum but decreased the concentration of acid-fast bacilli visible on microscopy, especially for sputum specimens containing high concentrations of M. tuberculosis. Bleach-sedimentation allowed examination of more of each specimen in the time available but decreased the inter-observer reliability with which slides were read. Thus bleach-sedimentation effects vary depending upon specimen characteristics and whether microscopy was done for a specified time, or until a specified number of microscopy fields had been read. These findings provide an explanation for the contradictory results of previous studies.Peer Reviewe

Mediterranean-climate streams and rivers: geographically separated but ecologically comparable freshwater systems

Streams and rivers in mediterranean-climate regions (med-rivers in med-regions) are ecologically unique, with flow regimes reflecting precipitation patterns. Although timing of drying and flooding is predictable, seasonal and annual intensity of these events is not. Sequential flooding and drying, coupled with anthropogenic influences make these med-rivers among the most stressed riverine habitat worldwide. Med-rivers are hotspots for biodiversity in all med-regions. Species in med-rivers require different, often opposing adaptive mechanisms to survive drought and flood conditions or recover from them. Thus, metacommunities undergo seasonal differences, reflecting cycles of river fragmentation and connectivity, which also affect ecosystem functioning. River conservation and management is challenging, and trade-offs between environmental and human uses are complex, especially under future climate change scenarios. This overview of a Special Issue on med-rivers synthesizes information presented in 21 articles covering the five med-regions worldwide: Mediterranean Basin, coastal California, central Chile, Cape region of South Africa, and southwest and southern Australia. Research programs to increase basic knowledge in less-developed med-regions should be prioritized to achieve increased abilities to better manage med-rivers