Effects of multimedia computer-assisted instruction (MCAI) on academic achievement in physical education of Greek primary students

Computer technology has become an integral part of physical education, yet there have been few studies exploring the use of multimedia technology in the instruction of Physical Education. The purpose of this study was to investigate if Computer Assisted Instruction (CAI) in Physical Education is functional in the school environment. An interactive multimedia CD-ROM program was developed, especially for the needs of the study, titled «The tree of Health». This intervention trial involved 12 fifth- and sixthgrade classes (N = 248 students), randomized into 3 groups: Multimedia Computer Assisted Instruction, Traditional Approach to teaching (TA), and Control. Students were tested using pre and post-tests that measured knowledge of «Health related fitness» subjects. The experiment lasted 12 class hours, two classes per week over six weeks. The results of an analysis of covariance indicated that there was a significant increase in achievement post-test for the (MCAI) group when compared to either the (TA) or control groups, F(1, 238) = 13.486, p < .0167; F(1, 238) = 53.872, p < .0167. These results indicate that this new educational tool is an effective way to introduce health-related physical education programs for young students in typical classroom settings.Computer technology has become an integral part of physical education, yet there have been few studies exploring the use of multimedia technology in the instruction of Physical Education. The purpose of this study was to investigate if Computer Assisted Instruction (CAI) in Physical Education is functional in the school environment. An interactive multimedia CD-ROM program was developed, especially for the needs of the study, titled «The tree of Health». This intervention trial involved 12 fifth- and sixthgrade classes (N = 248 students), randomized into 3 groups: Multimedia Computer Assisted Instruction, Traditional Approach to teaching (TA), and Control. Students were tested using pre and post-tests that measured knowledge of «Health related fitness» subjects. The experiment lasted 12 class hours, two classes per week over six weeks. The results of an analysis of covariance indicated that there was a significant increase in achievement post-test for the (MCAI) group when compared to either the (TA) or control groups, F(1, 238) = 13.486, p < .0167; F(1, 238) = 53.872, p < .0167. These results indicate that this new educational tool is an effective way to introduce health-related physical education programs for young students in typical classroom settings

Effects of multimedia computer-assisted instruction (MCAI) on academic achievement in physical education of Greek primary students

Computer technology has become an integral part of physical education, yet there have been few studies exploring the use of multimedia technology in the instruction of Physical Education. The purpose of this study was to investigate if Computer Assisted Instruction (CAI) in Physical Education is functional in the school environment. An interactive multimedia CD-ROM program was developed, especially for the needs of the study, titled «The tree of Health». This intervention trial involved 12 fifth- and sixthgrade classes (N = 248 students), randomized into 3 groups: Multimedia Computer Assisted Instruction, Traditional Approach to teaching (TA), and Control. Students were tested using pre and post-tests that measured knowledge of «Health related fitness» subjects. The experiment lasted 12 class hours, two classes per week over six weeks. The results of an analysis of covariance indicated that there was a significant increase in achievement post-test for the (MCAI) group when compared to either the (TA) or control groups, F(1, 238) = 13.486, p < .0167; F(1, 238) = 53.872, p < .0167. These results indicate that this new educational tool is an effective way to introduce health-related physical education programs for young students in typical classroom settings.Computer technology has become an integral part of physical education, yet there have been few studies exploring the use of multimedia technology in the instruction of Physical Education. The purpose of this study was to investigate if Computer Assisted Instruction (CAI) in Physical Education is functional in the school environment. An interactive multimedia CD-ROM program was developed, especially for the needs of the study, titled «The tree of Health». This intervention trial involved 12 fifth- and sixthgrade classes (N = 248 students), randomized into 3 groups: Multimedia Computer Assisted Instruction, Traditional Approach to teaching (TA), and Control. Students were tested using pre and post-tests that measured knowledge of «Health related fitness» subjects. The experiment lasted 12 class hours, two classes per week over six weeks. The results of an analysis of covariance indicated that there was a significant increase in achievement post-test for the (MCAI) group when compared to either the (TA) or control groups, F(1, 238) = 13.486, p < .0167; F(1, 238) = 53.872, p < .0167. These results indicate that this new educational tool is an effective way to introduce health-related physical education programs for young students in typical classroom settings

Ο Περιορισμός των θεμελιωδών δικαιωμάτων λόγω της πανδημίας.

Η παρούσα εργασία πραγματεύεται το ζήτημα του περιορισμού των θεμελιωδών δικαιωμάτων λόγω της πανδημίας της νόσου COVID-19 στην ελληνική έννομη τάξη. Η πρόκληση της πανδημίας ανέδειξε μία σειρά ζητημάτων, που αφορούν κυρίως την ένταση και την έκταση των περιορισμών αλλά και την ανθεκτικότητα του ίδιου του Συντάγματος απέναντι στις διαρκώς μεταβαλλόμενες κοινωνικές συνθήκες. Η δικαιολογητική βάση των μέτρων που υιοθετήθηκαν για την αντιμετώπιση της πρωτοφανούς υγειονομικής κρίσης, προέκυψε μέσα από τη στάθμιση ανάμεσα στη προστασία της δημόσιας υγείας και κατά επέκταση της ανθρώπινης ζωής αφενός, και στην απόλαυση μίας σειράς δικαιωμάτων και ελευθεριών αφετέρου, δημιουργώντας έτσι αξιακά διλήμματα και προβληματισμούς. Προκειμένου να αναλυθεί η παραπάνω θεματική, σε πρώτο επίπεδο εξετάζεται η έννοια του δικαιώματος στην υγεία στην εθνική, ευρωπαϊκή και διεθνή έννομη τάξη, όπως και ο ρόλος του κράτος και τα όρια παρέμβασής του. Στη συνέχεια, ακολουθούν τα σημαντικότερα μέτρα που λήφθηκαν στην ελληνική επικράτεια το χρονικό διάστημα 2020-2021, ενώ παρουσιάζονται και τα δικαιώματα που επηρεάστηκαν περισσότερο. Τέλος, ο λόγος στρέφεται στη σύγκρουση της θετικής υποχρέωσης του κράτους με την προσωπική αυτονομία του ατόμου, όπως αυτή προέκυψε μέσα από το μέτρο του υποχρεωτικού εμβολιασμού, ενώ αναλύεται και η έννοια της συνταγματικής προσαρμοστικότητας. Σε περιόδους κλονισμού των θεμελιωδών δικαιωμάτων και ελευθεριών είναι σίγουρο ότι δοκιμάζεται και η εμπιστοσύνη των πολιτών απέναντι στους εθνικούς και διεθνείς θεσμούς, ειδικά από τη στιγμή που αμφισβητείται η νομιμότητα και συνταγματικότητα των όποιων περιοριστικών μέτρων. Αυτό όμως που φαίνεται να προκύπτει μέσα από την εξέταση του παραπάνω ζητήματος, είναι η ρυθμιστική και κανονιστική ισχύς του Συντάγματος στην αντιμετώπιση εκτάκτων καταστάσεων, όπως αυτή της πανδημίας.The current thesis addresses the issue of the restriction of fundamental rights due to the COVID-19 pandemic in the Greek legal system. The challenge of the pandemic raised a number of issues, which mainly concern the intensity and extent of the restrictions, but also the endurance of the Constitution to the constantly changing social conditions. The justification of the measures adopted to deal with the unprecedented health crisis, emerged through the equation between the protection of public health and human life on the one hand, and the enjoyment of a number of rights and freedoms on the other, creating value concerns and dilemmas. In order to analyze the above subject, in the first level, the concept of the right to health in the national, European and international legal order is examined, as well as the role of the state and the limits of its intervention. Afterwards, the most important measures taken in the Greek territory during the period of 2020-2021 are presented, as well as some of the rights that were most affected. At last, the attention is focused on the conflict between the positive obligation of the state for taking measures and the personal autonomy of the individual as it arose through the measure of compulsory vaccination, while the concept of the constitutional adaptability is also analyzed. In times of shock to fundamental rights and freedoms, it is certain that citizens’ trust in national and international institutions is being tested, especially since the legitimacy and constitutionality of any restrictive measure are being questioned. However, what seems to emerge, through the examination of the above issue, is the regulatory power of the Constitution, when it comes to deal with emergencies, such as that of the pandemic

Atrial Flutter Ablation Using a Three-Dimensional Electroanatomical Mapping System

Typical atrial flutter ablation is usually performed conventionally, by creating a line across the cavotricuspid isthmus under fluoroscopic guidance. In this article, we present the case of a middle-aged male who was submitted to flutter ablation through use of a three-dimensional electroanatomical mapping system, yielding highly accurate and pedantic images.

Carrier Transport mechanisms contributing to the sub-threshold current in 3C-SiC-on-Si Schottky Barrier Diodes

3C-Silicon Carbide (3C-SiC) Schottky Barrier Diodes on silicon (Si) substrates (3C-SiC-on-Si) seem not to comply with the superior wide band gap expectations in terms of excessive measured sub-threshold current. In turn, that is one of the factors which deters their commercialization. Interestingly, the forward biased part of the Current-Voltage (I-V) characteristics in these devices carries considerable information about the material quality. In this context, an advanced Technology Computer Aided Design (TCAD) model for a vertical Platinum/3C-SiC Schottky power diode is created and validated with measured data. The model includes defects originating from both the Schottky contact and the hetero-interface of 3C-SiC with Si which allows the investigation of their impact on the magnification of the sub-threshold current. For this, barrier lowering, quantum field emission and trap assisted tunneling of majority carriers need to be considered at the non-ideal Schottky interface. The simulation results and measured data allowed for the comprehensive characterization of the defects affecting the carrier transport mechanisms of the forward biased 3C-SiC on Si power rectifier for the first time

Cardiac Resynchronisation Therapy and Cellular Bioenergetics: Effects Beyond Chamber Mechanics

Cardiac resynchronisation therapy is a cornerstone in the treatment of advanced dyssynchronous heart failure. However, despite its widespread clinical application, precise mechanisms through which it exerts its beneficial effects remain elusive. Several studies have pointed to a metabolic component suggesting that, both in concert with alterations in chamber mechanics and independently of them, resynchronisation reverses detrimental changes to cellular metabolism, increasing energy efficiency and metabolic reserve. These actions could partially account for the existence of responders that improve functionally but not echocardiographically. This article will attempt to summarise key components of cardiomyocyte metabolism in health and heart failure, with a focus on the dyssynchronous variant. Both chamber mechanics-related and -unrelated pathways of resynchronisation effects on bioenergetics – stemming from the ultramicroscopic level – and a possible common underlying mechanism relating mechanosensing to metabolism through the cytoskeleton will be presented. Improved insights regarding the cellular and molecular effects of resynchronisation on bioenergetics will promote our understanding of non-response, optimal device programming and lead to better patient care

Experimental and physics based study of the Schottky Barrier Height inhomogeneity and associated traps affecting 3C-SiC-on-Si Schottky Barrier Diodes

The ability of cubic phase (3C-) Silicon Carbide (SiC) to grow heteroepitaxially on Silicon (Si) substrates (3C-SiC-on-Si) is an enabling feature for cost-effective Wide Bandgap devices and homogeneous integration with Si devices. In this paper, the authors evaluated 3C-SiC-on-Si Schottky Barrier Contacts by fabricating and testing non-freestanding lateral Schottky Barrier Diodes (LSBD). To gain a deep physical insight of the complex carrier transport phenomena that take place in this material, advanced Technology Computer Aided Design (TCAD) models were developed which allowed accurately matching of measurements with simulations. The models incorporate the device geometry, an accurate representation of the bulk material properties, and complex trapping/de-trapping and tunnelling phenomena which appear to affect the device performance. The observed non-uniformities of the Schottky Barrier Height (SBH) were successfully modelled through the incorporation of interfacial traps. The combination of TCAD with fabrication and measurements enabled the identification of trap profiles and pin their influence on the electrical performance of 3C-SiC-on-Si LSBD. The effect of temperature was studied by engaging the identified trap profiles and calculating the occupation distribution of electrons in 3C-SiC at elevated temperature. The investigation constitutes an imperative knowledge step towards the development of devices that take advantage of 3C-SiC material properties

Shipborne vertical profiles of dust aerosols obtained with Unmanned Aerial Vehicles in the Mediterranean and the Middle East: First results ofthe AQABA campaign

International audienceAtmospheric aerosols have a large role in the earth climate through direct or indirect effects on the radiative energy budget. As the aerosol characteristics are highly variable spatially and in time, observations of these characteristics are needed in regions, where the climate change effects are the most severe. One of these types of hotspots is the East Mediterranean and Middle East (EMME region) (Lelieveld et al., 2012), however, high quality in-situ observations in the Middle East and Arabian Peninsula region are still missing. To gain such a high quality observations in this region, the "Air Quality and climate change in the Arabian Basin" (AQABA) oceanographic campaign was organized during summer 2017, shipping from France, through the Suez Canal and around the Arabian Peninsula to Kuwait and back to France. The total length of the campaign was more than 2 months. A wide spectrum of environmental conditions was encountered during the campaign, ranging from pristine conditions over the Indian Ocean, to dusty (low polluted) atmosphere in the Red Sea affected by the Saharan dust and the highly dusty and polluted Gulf. To add on the remote sensing data of aerosol characteristics above the sea surface collected on the ship, the Cyprus Institute's Unmanned Systems Research Laboratory (USRL) team deployed Unmanned Aerial Vehicles (UAVs) to gain in-situ observations of aerosol properties inside and above the marine boundary layer. A small, fixed wing UAV was hand launched from the ship, which then climbed up to 2000 m (a.s.l.) and then returned to the ship and landed on a net. A modified AlphaSense N-2 Optical Particle Counter (OPC) was used on board the UAV to observe the number size distribution of aerosol particles (range: 0.38-17.5 µm, with 16 channels). Meteorological parameters (T, RH and P), as well as a video was recorded also. A total of 16 Successful flights were made, mostly in the Mediterranean and in the Persian Gulf, with few flights in the Red Sea and the Arabian Sea. The presentation will show data acquired on board the UAVs and comparison with ceilometer data obtained on the ship to identify possible dust layers and other interesting events. The differences in aerosol size distributions inside and above the boundary layer will be discussed, as well as any interesting case studies or events during the measurements