Novos paradigmas para a educação dos superdotados: a questão dos estudantes underachievers e com dupla excepcionalidade

[Extrato] A primeira década do século XXI chegou ao fim marcada pelo desenvolvimento de uma sociedade cada vez mais interconectada, mediada por tecnologias da informação e da comunicação e pelo sentimento de impotência diante da demanda de soluções que a atualidade exige. A contemporaneidade estabelece mudanças que ocorrem de maneira tão veloz, que já não se consegue mais definir, com a devida antecedência, as habilidades e competências necessárias para se viver e conviver satisfatoriamente...info:eu-repo/semantics/publishedVersio

Comparative study of human exposure to mercury in riverside communities in the Amazon region

Four populations in the Amazon area were selected for a comparative study of mercury-exposed and non-exposed populations: São Luiz do Tapajós, Barreiras, Panacauera, and Pindobal Grande. The highest mercury levels in human hair samples were found in São Luiz do Tapajós and Barreiras, greatly exceeding the limits established by the World Health Organization. Panacauera showed an intermediate level below 9 µg/g. This was the first comparative and simultaneous evaluation of mercury exposure in the Amazon area. Also, thanks to this type of monitoring, we were able to eliminate the uncertainties about the reference dose. On the basis of these data, we can conclude that the mercury levels detected in exposed populations of the Tapajós River basin may be dangerous not only because they are above the World Health Organization limits, but also because the simultaneous mercury detection in non-exposed populations with similar characteristics provided a valid control and revealed lower mercury levels. Our results support the importance of continuous monitoring in both exposed and non-exposed populations

Large bilateral adrenal metastases in non-small cell lung cancer

BACKGROUND: The adrenal gland is one of the common sites of metastasis from primary lung cancer. Adrenal metastases are usually unilateral however bilateral adrenal metastases are seen in 10% of all lung cancer patients; of these 2–3% occurs at the initial presentation of non-small cell lung cancer. Secondary tumors can disrupt the structure and function of the adrenal. This can lead to adrenal hemorrhage, which constitutes a life threatening hazard for the patient. CASE PRESENTATION: A 59-year-old male presented with persisting abdominal pain. His initial work-up revealed significant anemia, an invasive process in the right upper lobe of the lung and large masses of heterogeneous texture, with hemorrhagic and necrotic elements in both adrenal glands. A biopsy confirmed it to be a large-cell carcinoma of the lungs. The patient developed severe leukocytosis akin to the paraneoplastic syndrome and died suddenly five days after the administration of chemotherapy. CONCLUSION: Intratumoral hemorrhage is a rare but life threatening complication of adrenal metastases and should be treated as soon as it has been diagnosed. If adrenalectomy is not feasible, combination chemotherapy should be applied as in metastatic disease. For choosing the appropriate chemotherapeutic regimen it is important to accurately achieve the diagnosis

«Οι ομάδες, οι συγκρούσεις στο σχολείο και η επίδρασή τους στη λήψη των αποφάσεων του συλλόγου διδασκόντων»

Η παρούσα εργασία έχει ως σκοπό να συμβάλλει στην έρευνα που αφορά τις διομαδικές συγκρούσεις στο σύλλογο διδασκόντων των σχολικών μονάδων και πως αυτές επιδρούν στη λήψη των αποφάσεων. Στο πλαίσιο αυτό διερευνώνται οι θεωρίες των ομάδων και η ιστορική τους εξέλιξη και η εφαρμογή τους στην εκπαίδευση, τα είδη των ομάδων που δημιουργούνται στις οργανώσεις, οι διομαδικές σχέσεις συνεργασίας, αντα-γωνισμού και σύγκρουσης, οι τύποι των συγκρούσεων στις οργανώσεις και ιδιαίτερα οι πηγές των συγκρούσεων στο χώρο του σχολείου. Επιπλέον διερευνώνται το στυλ διοίκησης, η διαδικασία και τα μοντέλα λήψης απόφασης και ιδιαίτερα οι αιτίες των συ-γκρούσεων στο σχολείο και πως οι συγκρούσεις αυτές επιδρούν στη λήψη των αποφάσεων του Συλλόγου Διδασκόντων. Τέλος πως οι συμμετοχικές αποφάσεις και η από κοινού συμφωνία όλων των ομάδων σε ένα πλαίσιο στρατηγικής για το σχολείο, που θα υλοποιηθεί τα επόμενα χρόνια κατά τη διάρκεια της θητείας του διευθυντή (στόχοι, όραμα, αξίες, κλίμα, κουλτούρα), μπορεί να οδηγήσει σε αποφυγή συγκρούσεων και διάλυση των ομάδων.This dissertation aims to contribute to research on intergroup conflicts in the Teachers' board of schools and how these affect the decision making process. In this context, we explore the theories of groups and their historical development and its application in education, types of groups created in organizations, intergroup cooperation, competition and conflict, types of conflicts in organizations and especially the conflict sources at school. In addition, the management style, process and decision making models, and in particular the causes of conflicts at school, are investigated and how these conflicts af-fect decision making by the Teachers' board. Finally how participatory decisions and the joint agreement of all the groups on a strategic framework for the school, which will be implemented in the coming years during the director's mandate (objectives, vision, val-ues, climate, culture), can lead to avoiding conflicts and dissolving groups

Mercury toxicity in the Amazon: contrast sensitivity and color discrimination of subjects exposed to mercury

We measured visual performance in achromatic and chromatic spatial tasks of mercury-exposed subjects and compared the results with norms obtained from healthy individuals of similar age. Data were obtained for a group of 28 mercury-exposed subjects, comprising 20 Amazonian gold miners, 2 inhabitants of Amazonian riverside communities, and 6 laboratory technicians, who asked for medical care. Statistical norms were generated by testing healthy control subjects divided into three age groups. The performance of a substantial proportion of the mercury-exposed subjects was below the norms in all of these tasks. Eleven of 20 subjects (55%) performed below the norms in the achromatic contrast sensitivity task. The mercury-exposed subjects also had lower red-green contrast sensitivity deficits at all tested spatial frequencies (9/11 subjects; 81%). Three gold miners and 1 riverine (4/19 subjects, 21%) performed worse than normal subjects making more mistakes in the color arrangement test. Five of 10 subjects tested (50%), comprising 2 gold miners, 2 technicians, and 1 riverine, performed worse than normal in the color discrimination test, having areas of one or more MacAdam ellipse larger than normal subjects and high color discrimination thresholds at least in one color locus. These data indicate that psychophysical assessment can be used to quantify the degree of visual impairment of mercury-exposed subjects. They also suggest that some spatial tests such as the measurement of red-green chromatic contrast are sufficiently sensitive to detect visual dysfunction caused by mercury toxicity

LNCS

We construct a perfectly binding string commitment scheme whose security is based on the learning parity with noise (LPN) assumption, or equivalently, the hardness of decoding random linear codes. Our scheme not only allows for a simple and efficient zero-knowledge proof of knowledge for committed values (essentially a Σ-protocol), but also for such proofs showing any kind of relation amongst committed values, i.e. proving that messages m_0,...,m_u, are such that m_0=C(m_1,...,m_u) for any circuit C. To get soundness which is exponentially small in a security parameter t, and when the zero-knowledge property relies on the LPN problem with secrets of length l, our 3 round protocol has communication complexity O(t|C|l log(l)) and computational complexity of O(t|C|l) bit operations. The hidden constants are small, and the computation consists mostly of computing inner products of bit-vectors

Liver hydatid cyst perforated into the large bowel: a case report

Perforation of the liver hydatid cyst into hollow abdominal organs is an extremely rare complication. A case of two synchronous hydatid cysts in an old lady is presented. The patient had one multilobular cyst perforated into the right colon and another one uncomplicated located at the right ovary. She underwent partial cystectomy, omentoplasty, right hemicolectomy, and total hysterectomy, and had an uneventful recovery