Ο εθισμός των εφήβων στα παιχνίδια στο διαδίκτυο – πρόληψη και αντιμετώπιση

Η συγκεκριμένη εργασία αναπτύσσει την έννοια του Διαδικτύου, μιας νέας τεχνολογίας που έχει επηρεάσει τους ανθρώπους, προσφέρει πολλά οφέλη στους χρήστες του αλλά ταυτόχρονα μπορεί να έχει και αρνητικές επιπτώσεις. Ορισμένα άτομα είναι απόλυτα απορροφημένα από το διαδίκτυο, δεν μπορούν να ελέγξουν τη χρήση του και θέτουν σε κίνδυνο την εργασία και τις σχέσεις τους. Η έννοια του "εθισμού στο διαδίκτυο" έχει εξηγηθεί ως ανεξέλεγκτη, καταστροφική χρήση της τεχνολογίας. Επίσης, τα ηλεκτρονικά παιχνίδια εξελίχθηκαν σε κάτι πιο πολύ από παιχνίδια, μάλλον αποτελούν αυτοτελείς τρισδιάστατες κοινωνίες. Κάθε παιχνίδι έχει το δικό του σκηνικό από δάση, λιβάδια, παραλίες, βουνά και πόλεις. Οι παίκτες μπορούν να βυθιστούν και να εξελιχθούν συλλογικά σε αυτούς τους εικονικούς κόσμους. Η συγκεκριμένη εργασία μελετά το θεωρητικό υπόβαθρο των σχετικών με το διαδίκτυο και με τα ηλεκτρονικά παιχνίδια εννοιών, και παρουσιάζει τη συσχέτιση τους με τους εφήβους.This paper analyzes the concept of Internet, which is a new technology that has affected the world and offers many benefits to its users but at the same time has a negative impact. Some people are totally addicted to the internet, cannot control their use and endanger their work and relationships. The concept of "internet addiction" has been explained as an uncontrollable, destructive use of technology. Electronic online games have evolved into something more than games, but rather are self-contained three-dimensional societies. Each game has its own scenery of forests, meadows, beaches, mountains and cities. Players can enter and evolve collectively in these virtual worlds. This thesis studies the theoretical background of internet related concepts and expound their correlation with teenagers

Vacancy formation in MoO3: hybrid density functional theory and photoemission experiments

Molybdenum oxide (MoO3) is an important material that is being considered for numerous technological applications, including catalysis and electrochromism.</p

Impact of boron and indium doping on the structural, electronic and optical properties of SnO₂

Tin dioxide (SnO2), due to its non-toxicity, high stability and electron transport capability represents one of the most utilized metal oxides for many optoelectronic devices such as photocatalytic devices, photovoltaics (PVs) and light-emitting diodes (LEDs). Nevertheless, its wide bandgap reduces its charge carrier mobility and its photocatalytic activity. Doping with various elements is an efficient and low-cost way to decrease SnO2 band gap and maximize the potential for photocatalytic applications. Here, we apply density functional theory (DFT) calculations to examine the effect of p-type doping of SnO2 with boron (B) and indium (In) on its electronic and optical properties. DFT calculations predict the creation of available energy states near the conduction band, when the dopant (B or In) is in interstitial position. In the case of substitutional doping, a significant decrease of the band gap is calculated. We also investigate the effect of doping on the surface sites of SnO2. We find that B incorporation in the (110) does not alter the gap while In causes a considerable decrease. The present work highlights the significance of B and In doping in SnO2 both for solar cells and photocatalytic applications

Atomic structure and electronic properties of hydrogenated X (=C, Si, Ge, and Sn) doped TiO2:A theoretical perspective

Titanium dioxide (TiO2) and especially its polymorph, anatase, are widely used transition-metal oxides for renewable energy applications such as photocatalytic and photovoltaic devices due to their chemical stability and their electrochemical and photocatalytic properties. However, the wide energy bandgap of anatase limits its photocatalytic ability and electron transport properties. Doping with appropriate elements is an established way to control and tune the optical and electronic properties of anatase such as conductivity, transparency, and bandgap. Metal doping can improve anatase’s properties as an electron transport layer, whereas non-metal (anion) doping is widely used to improve its photocatalytic activity. Herein, we investigate the effect of carbon group dopants in conjunction with hydrogenation of TiO2 by applying density functional theory. We find that hydrogenation has a positive impact on the structural and electronic properties of TiO2, thus making it an appropriate candidate for energy harvesting devices

Effect of halogen doping on the electronic,electrical, and optical properties of anatase TiO2

Titanium dioxide (TiO2) is one of the most used oxides in renewable energy applications, such as hydrogen production, photovoltaics, and light-emitting diodes. To further improve the efficiency of the devices, doping strategies are used to modify their fundamental properties. Here, we used density functional theory (DFT) simulations to explore the effect of all the halogen dopants on the structural, electronic, and optical properties of TiO2. We investigated both the interstitial and the oxygen substitutional positions, and for the optimized structures, we used hybrid DFT calculations to predict the electronic and optical properties. In all cases, we found that halogen dopants reduce the bandgap of the pristine TiO2 while gap states also arise. The halogen dopants constitute a single acceptor when they occupy interstitial sites, while when they are inserted in oxygen sites, they act as donors. This can be established by the states that form above the valence band. It is proposed that these states contribute to the significant changes in the optical and electronic properties of TiO2 and can be beneficial to the photovoltaic and photocatalytic applications of TiO2. Importantly, the iodine doping of TiO2 significantly reduces the bandgap of TiO2 while increasing its dielectric constant, making it suitable for light-harvesting applications

Η συμβολή των γονιών στη διαχείριση του άγχους στα Μαθηματικά μέσω της Μουσικής. Μια έρευνα δράσης

Η «Μαθηματικοφοβία» είναι ένα φαινόμενο που έχει μελετηθεί αρκετά. Σημαντικό ρόλο στην ανάπτυξή της παίζουν οι απόψεις των γονέων για τα Μαθηματικά, οι πεποιθήσεις τους σχετικά με τις δυνατότητες του παιδιού τους, καθώς και το επίπεδο εμπλοκής τους στο καθημερινό διάβασμα για το σχολείο. Η εργασία αυτή είναι μία έρευνα δράσης σκοπός της οποίας ήταν η ανάδειξη της επιρροής των γονιών στην ψυχολογία του παιδιού τους σύμφωνα με τις πεποιθήσεις τους και τα πλεονεκτήματα της εισαγωγής της Μουσικής στην εκπαιδευτική διαδικασία, μέσα από τα επιστημονικά άρθρα. Μελετήθηκαν οι θετικές ή αρνητικές επιπτώσεις της εμπλοκής του γονιού στη σχολική μελέτη και το αν η Μουσική μπορεί να χρησιμοποιηθεί ως βασικό εργαλείο νοηματοδότησης δύσκολων εννοιών, όπως είναι τα κλάσματα. Τέλος, μέρος της έρευνας αυτής ήταν ένα εργαστήρι, μέσω του οποίου έγινε μία προσπάθεια σύνδεσης θεωρίας και πράξης, μελετώντας σε κάθε φάση τα αποτελέσματά του. Πήραν μέρος μαθητές Μουσικής ηλικίας 10-13 χρονών και οι γονείς τους. Στο εργαστήρι αυτό, στο οποίο μέσα από βιωματική δράση, παιχνίδι και δημιουργία με εργαλείο τη Μουσική, εργάστηκαν πάνω στις ισοδυναμίες και τα αθροίσματα κλασμάτων. Η εκπαιδευτική αυτή παρέμβαση εξυπηρέτησε την γόνιμη συνεργασία γονιού και παιδιού, με διδακτικό στόχο την κατανόηση της έννοιας του αθροίσματος κλασμάτων και ισοδυναμιών και απώτερο σκοπό την απεμπλοκή του παιδιού από το άγχος του.&quot;Maths Phobia&quot; is a phenomenon that has been studied a lot. An important role in its development is played by parents&apos; views on mathematics, their beliefs about their child&apos;s abilities, and their level of involvement in daily school studying. This assignment is an action research whose purpose was to highlight the influence of parents on their child&apos;s psychology according to their beliefs and the advantages of introducing Music into the educational process through the scientific articles. The positive or negative implications of parent involvement in school studying and whether Music can be used as a basic tool for understanding difficult concepts, such as fractions, have been studied. Finally, part of this research was a workshop, through which an attempt was made to connect theory and practice, studying its results at each stage. Music pupils aged 10-13 years old and their parents took part. In this workshop, through experiential action, play and musical creation, they worked on the equivalences and sums of fractions. This educational intervention served fruitful parent and child co-operation, with the aim of teaching the concept of the sum of fractions and equivalences and the ultimate goal of unsetting the child from their anxiety

Diagnostic Clinical and Laboratory Findings in Response to Predetermining Bacterial Pathogen: Data from the Meningitis Registry

BACKGROUND: Childhood meningitis continues to be an important cause of mortality in many countries. The search for rapid diagnosis of acute bacterial meningitis has lead to the further exploration of prognostic factors. This study was scheduled in an attempt to analyze various clinical symptoms as well as rapid laboratory results and provide an algorithm for the prediction of specific bacterial aetiology of childhood bacterial meningitis. METHODOLOGY AND PRINCIPAL FINDINGS: During the 32 year period, 2477 cases of probable bacterial meningitis (BM) were collected from the Meningitis Registry (MR). Analysis was performed on a total of 1331 confirmed bacterial meningitis cases of patients aged 1 month to 14 years. Data was analysed using EPI INFO (version 3.4.3-CDC-Atlanta) and SPSS (version 15.0-Chicago) software. Statistically significant (p<0.05) variables were included in a conditional backward logistic regression model. A total of 838 (63.0%) attributed to Neisseria meningitidis, 252 (18.9%) to Haemophilus influenzae, 186 (14.0%) to Streptococcus pneumoniae and 55 (4.1%) due to other bacteria. For the diagnosis of Meningococcal Meningitis, the most significant group of diagnostic criteria identified included haemorrhagic rash (OR 22.36), absence of seizures (OR 2.51), headache (OR 1.83) and negative gram stain result (OR 1.55) with a Positive Predictive Value (PPV) of 96.4% (95%CI 87.7-99.6). For the diagnosis of Streptococcus pneumoniae, the most significant group of diagnostic criteria identified included absence of haemorrhagic rash (OR 13.62), positive gram stain (OR 2.10), coma (OR 3.11), seizures (OR 3.81) and peripheral WBC > or = 15000/microL (OR 2.19) with a PPV of 77.8% (95%CI 40.0-97.2). For the diagnosis of Haemophilus influenzae, the most significant group of diagnostic criteria included, absence of haemorrhagic rash (OR 13.61), age > or = 1 year (OR 2.04), absence of headache (OR 3.01), CSF Glu < 40 mg/dL (OR 3.62) and peripheral WBC < 15,000/microL (OR 1.74) with a PPV of 58.5% (95%CI 42.1-73.7). CONCLUSIONS: The use of clinical and laboratory predictors for the assessment of the causative bacterial pathogen rather than just for predicting outcome of mortality seems to be a useful tool in the clinical management and specific treatment of BM. These findings should be further explored and studied