bluuebunny/crossref_metadata_2025 huggingface dataset:
Διερεύνηση της επίδοσης στα κλάσματα μαθητών Ε΄& Στ΄ δημοτικού με δυσκολίες στα μαθηματικά ή/και στην ανάγνωση
Authors: Καντεμνίδη Ελένη , Καραγιαννάκης Γιάννης , Γαλανάκη Ευαγγελία
Published: August 2020

Οι υπάρχουσες έρευνες αναδεικνύουν ότι πολλοί μαθητές αντιμετωπίζουν δυσκολίες στα κλάσματα εξαιτίας της σύνθετης έννοιας αυτών καθώς και των λανθασμένων στρατηγικών που χρησιμοποιούν για τη διαχείριση τους. Σύμφωνα με σύγχρονα ερευνητικά ευρήματα, φαίνεται πως τόσο η εννοιολογική όσο και η διαδικαστική γνώση των κλασμάτων είναι απαραίτητες για τη μαθηματική ικανότητα. Στόχος της παρούσας μελέτης αποτελεί η ανάδειξη της ύπαρξης ή μη διαφοροποίησης στην επίδοση στα κλάσματα ολικά, εννοιολογικά και διαδικαστικά μεταξύ παιδιών με και χωρίς δυσκολίες στα μαθηματικά ή την ανάγνωση. Για τους σκοπούς της έρευνας χρησιμοποιήθηκε το MathPro test το οποίο αξιολογεί μαθηματικές δεξιότητες στους τομείς: επίγνωσης αριθμού, μνήμης, οπτικο-χωρικό και συλλογιστικής, ένα τεστ κλασμάτων που αξιολογεί την εννοιολογική και τη διαδικαστική γνώση, ένα ερωτηματολόγιο αξιολόγησης της επίδοσης στα μαθηματικά και την ανάγνωση από το δάσκαλο της τάξης και ένα τεστ αναγνωστικής ευχέρειας. Τα αποτελέσματα έδειξαν πως οι μαθητές με δυσκολίες στα μαθηματικά ή την ανάγνωση σημείωσαν στατιστικά σημαντικά χαμηλότερη επίδοση στα κλάσματα συνολικά, αλλά και επιμέρους στη διαδικαστική και εννοιολογική γνώση των κλασμάτων. Οπότε, προκύπτει η ανάγκη καλλιέργειας των δεξιοτήτων που απαιτούνται για τη διαχείριση κλασματικών αριθμών με σκοπό να αντιμετωπίσουν τις εν λόγω δυσκολίες οι μαθητές.
ADHD and depression: Comorbidity and Therapeutic Approaches in Children
Authors: Karanana Evangelia V. , Karananas Efthimios V.
Published: August 2020

The aim of thie study is to explore the case of children and adolescents with ADHD and depression. Firstly, the conceptual definition of ADHD and its characteristics are presented. Then comorbidity between ADHD and depression is discussed. In particular, it is examined when this comorbidity occurs, under what circumstances and its justification. In addition, the types of treatment approaches and how the family and school can contribute are presented. Finally, conclusions are made to strengthen the belief of self-efficacy of children-students in order to cope with depression.
Η πρόκληση του Αυτισμού για την Οικογένεια και η απαραίτητη στήριξη της
Authors: Κατσούγκρη Αναστασία , Κουμπιάς Εμμανουήλ
Published: August 2020

Ο Αυτισμός είναι μία κατάσταση που συνοδεύει το παιδί σε όλη του την ζωή. Όμως η κατάσταση  αυτή  επηρεάζει όλη την οικογένεια . Μετά  την διάγνωση  οι γονείς μένουν μετέωροι, αίολοι, χωρίς να  ξέρουν τι να κάνουν. Ο Αυτισμός λόγω των γνωστικών και διαπροσωπικών προβλημάτων επηρεάζει με διαφορετικό τρόπο την οικογένεια  συγκριτικά με τις άλλες μορφές αναπηρίας. Παράλληλα η  αλληλεπίδραση μεταξύ των μελών της οικογένειας  και του παιδιού με Αυτισμό διαταράσσει τις μεταξύ του σχέσεις. δημιουργώντας εντάσεις, συγκρούσεις οι οποίες  δεν ωφελούν κανένα ενώ αποβαίνουν  καταστροφικές τόσο για το ίδιο το παιδί όσο και για τα υπόλοιπα μέλη της οικογένειας.  Ο Αυτισμός σύμφωνα με την θεωρία των συστημάτων, θα πρέπει να  αντιμετωπιστεί συστημικά, με προσανατολισμό και  κεντρικό άξονα το παιδί αλλά και την οικογένεια  Η στήριξη όλων των μελών είναι αναγκαία, για να βοηθηθούν οι ίδιοι οι γονείς και όσοι εμπλέκονται στην ανατροφή ενός παιδιού με Αυτισμό. Στην κατεύθυνση αυτή  σημαντικό ρόλο μπορεί να παίξει το σχολείου αλλά και η πολιτεία, στον τομέα συμβουλευτικής και υποστήριξης της οικογένειας.
Χρωμόσωμα 18: Από τη γνωμάτευση στην οργάνωση της Καθημερινότητας και του Σχολείου και στην κοινωνική ένταξη
Authors: Μιγκίρου Μαρία , Τσουρουνάκης Αγγελος
Published: August 2020

Στην παρούσα εργασία αρχικά παρουσιάζεται η κλινική εικόνα του παιδιού που έχει διαγνωσθεί με τη σπάνια χρωμοσωμιακή ανωμαλία που γενετικά ορίζεται ως «Τετρασωμία 18p». Η κλινική του εικόνα περιλαμβάνει τη εγκεφαλική λειτουργία-απεικόνιση, τη συνοδή συμπτωματολογία, τη συννοσηρότητα με άλλες διαταραχές καθώς και το βαθμό αυτοεξυπηρέτησης. Στη συνέχεια γίνεται παράθεση στοιχείων που αφορούν τη Φυσική, Γνωστική, Συναισθηματική  και Κοινωνική ανάπτυξη του παιδιού, σύμφωνα με βιβλιογραφικές αναφορές, έρευνες, στοιχεία διαβίωσης και κατάκτησης αναπτυξιακών σταδίων, βασιζόμενοι στην κλινική – αναπτυξιακή εικόνα  του διαγνωσθέντος παιδιού. Με βάση την ανάπτυξη του και τις κοινωνικοοικονομικές συνθήκες καθορίζεται η οργάνωση της καθημερινότητας του (ρουτίνα) και του σχολείου, καθώς και της κοινωνικής του ένταξης σε σχέση πάντα με το οικογενειακό και κοινωνικό του περιβάλλον. Γίνεται αναφορά σε έρευνες σε διάφορα κοινωνικά περιβάλλοντα και σε διαφορετικές ηλικίες και συγκρίνονται με το την περίπτωση διάγνωσης του παιδιού.
Διερεύνηση της αυτεπάρκειας έφηβων μαθητών και των γνωστικών, συναισθηματικών στρατηγικών που χρησιμοποιούν σε αρνητικά γεγονότα της ζωής
Authors: Μπαραλού Βασιλική
Published: August 2020

Η έρευνα δείχνει ότι η αυτεπάρκεια (Bandura, 1997) σχετίζεται αρνητικά με το επίπεδο της κατάθλιψης και η χρήση ορισμένων γνωστικών, συναισθηματικών στρατηγικών προτείνεται ως ενδεικτικός παράγοντας διαταραχών. Στην εργασία αυτή διερευνάται η αυτεπάρκεια έφηβων μαθητών στην Ελλάδα, με την κλίμακα SEQ-C (Muris, 2001) και των γνωστικών, συναισθηματικών στρατηγικών που χρησιμοποιούν για την αντιμετώπιση αρνητικών γεγονότων της ζωής με την κλίμακα CERQ (Garnefski et al., 2007), σε δείγμα 135 μαθητών.Τα ευρήματα δείχνουν ότι οι μαθητές Γυμνασίου του δείγματος χρησιμοποιούν σε μεγαλύτερο βαθμό από τους μαθητές Λυκείου τις ακόλουθες στρατηγικές: Καταστροφολογία και Κατηγορώντας τους άλλους. Οι συμμετέχοντες διαφοροποιούνται σε στατιστικά σημαντικό βαθμό στη χρήση επιμέρους γνωστικών, συναισθηματικών στρατηγικών ως προς τη σχολική τάξη, την  επίδοση και το μορφωτικό επίπεδο του πατέρα. Η αυτεπάρκεια και η χρήση γνωστικών, συναισθηματικών στρατηγικών παρουσιάζουν θετική συσχέτιση οφειλόμενη σε συσχετίσεις επιμέρους διαστάσεων των χρησιμοποιηθέντων κλιμάκων. Τα ευρήματα αυτά αν και χρειάζονται επιβεβαίωση από μεγαλύτερης έκτασης έρευνα, υποδεικνύουν ότι η αυτεπάρκεια και οι γνωστικές, συναισθηματικές στρατηγικές μπορούν να χρησιμοποιηθούν για την εκτίμηση της μακροχρόνιας κατάθλιψης των έφηβων μαθητών τόσο αυτόνομα, όσο και σε συνδυασμό μεταξύ τους για αύξηση της αξιοπιστίας και της εγκυρότητας.
Εκπαίδευση Χαρισματικών Μαθητών-Δειγματοληπτική Έρευνα
Authors: Βασίλιεβιτς Mλάντεν , Μαυροθανάση Μαρία
Published: August 2020

Η έρευνα αυτή είχε ως στόχο τη διερεύνηση των στάσεων που έχουν οι σύγχρονοι εκπαιδευτικοί απέναντι στους χαρισματικούς μαθητές, με δεδομένο, ότι η ευνοϊκή στάση των εκπαιδευτικών, αποτελεί έναν ισχυρό προγνωστικό δείκτη, για την εκπαιδευτική πορεία των μαθητών στο σχολείο, σύμφωνα με τη θεωρία της «αυτοεκπληρούμενης προφητείας» (Rosenthal -Jacobson (1968). Για το λόγο αυτό, σχεδιάστηκε η παρούσα δειγματοληψία αντιπροσωπευτικού δείγματος, όπου το δείγμα ήταν σκόπιμα και χωρίς πιθανότητα επιλεγμένο, επειδή ήταν προσιτό στον ερευνητή. Η ερευνητική υπόθεση είναι ότι, η επιμόρφωση στην ειδική αγωγή μπορεί να ευαισθητοποιήσει τους εκπαιδευτικούς απέναντι στις ιδιαίτερες εκπαιδευτικές και ψυχοκοινωνικές ανάγκες που έχουν οι χαρισματικοί μαθητές, γεγονός που δε φαίνεται να επιβεβαιώνεται από τα πορίσματα της έρευνας, αφού δεν υπάρχουν μεγάλες αποκλίσεις μεταξύ των δύο ομάδων εκπαιδευτικών, ενώ διαπιστώνονται και διαφοροποιήσεις στις απαντήσεις μεταξύ των εκπαιδευτικών με επιμόρφωση στην ειδική αγωγή. Η διαπίστωση αυτή εγείρει προβληματισμούς που θα μπορούσαν να διερευνηθούν σε μία μελλοντική επανεξέταση με τη συμπερίληψη στην ανάλυση και άλλων παραμέτρων, που δεν ερευνήθηκαν επειδή ο σχεδιασμός της έρευνας, προέβλεπε τη σύγκριση δύο ομάδων με βάση την παράμετρο της επιμόρφωσης.
Η επίδραση της ηλικίας στην επίδοση μαθητών δημοτικού σε αριθμητικά και οπτικοχωρικά ερεθίσματα συλλογιστικής στα μαθηματικά
Authors: Σκανδάλη Μαρία , Ρούσσος Πέτρος , Καραγιαννάκης Ιωάννης
Published: August 2020

Το σημείο εκκίνησης της εργασίας ήταν η διερεύνηση της γνωστικής ανάπτυξης των παιδιών διαφορετικών τάξεων, κατά τη σχολική ηλικία, στη μαθηματική δεξιότητα της συλλογιστικής.  Η συλλογιστική διακρίνεται σε αριθμητικά και οπτικοχωρικά ερεθίσματα, που προσδίδουν μία σχετικά πλήρη εικόνα για τη μαθηματική ικανότητα. Μελετήθηκε, επίσης, και η πιθανή συσχέτιση των δύο προαναφερθέντων ερεθισμάτων, ανά ηλικία, δηλαδή σχολική τάξη. Οι συμμετέχοντες/-ουσες αποτελούνταν από 2371 μαθητές και μαθήτριες σχολικής ηλικίας, όντας άριστοι ομιλητές/-ριες της ελληνικής γλώσσας, από όλες τις τάξεις του δημοτικού σχολείου, δημοσίων και ιδιωτικών, σε πανελλήνια κλίμακα. Το ερευνητικό εργαλείο που χορηγήθηκε είναι το «Τεστ Μαθηματικού Προφίλ & Δυσαριθμησίας» (MathPro Test) στο πλαίσιο στάθμισής του. Τα ευρήματα που προέκυψαν, από την μονοπαραγοντική ανάλυση διακύμανσης για την επίδραση της ηλικίας, ανέδειξαν στατιστικά σημαντικές διαφορές σχεδόν μεταξύ όλων των τάξεων, μερικές εκ των οποίων είχαν και υψηλό μέγεθος επίδρασης. Μη στατιστικά σημαντική διαφορά βρέθηκε μεταξύ της Ε΄ και Στ΄ τάξης στο σύνολο των δοκιμασιών. Ως προς τη πιθανή συσχέτιση των δύο ερεθισμάτων, εντοπίστηκαν μεσαίοι δείκτες συνάφειας μεταξύ σχεδόν όλων των οπτικοχωρικών και αριθμητικών ερεθισμάτων ανά τάξη.  Τα ευρήματα συζητούνται σύμφωνα με διεθνή βιβλιογραφία σχετικά με τα μαθηματικά και τη συλλογιστική, ως προς και τα δύο είδη ερεθισμάτων και συνάμα τη σχέση αυτών.
Digital Paywall Design: Implications for Content Demand and Subscriptions
Authors: Aral Sinan , Dhillon Paramveer S.
Published: August 2020

Most online content publishers have moved to subscription-based business models regulated by digital paywalls. But the managerial implications of such freemium content offerings are not well understood. We, therefore, utilized microlevel user activity data from the New York Times to conduct a large-scale study of the implications of digital paywall design for publishers. Specifically, we use a quasi-experiment that varied the (1) quantity (the number of free articles) and (2) exclusivity (the number of available sections) of free content available through the paywall to investigate the effects of paywall design on content demand, subscriptions, and total revenue. The paywall policy changes we studied suppressed total content demand by about 9.9%, reducing total advertising revenue. However, this decrease was more than offset by increased subscription revenue as the policy change led to a 31% increase in total subscriptions during our seven-month study, yielding net positive revenues of over $230,000. The results confirm an economically significant impact of the newspaper’s paywall design on content demand, subscriptions, and net revenue. Our findings can help structure the scientific discussion about digital paywall design and help managers optimize digital paywalls to maximize readership, revenue, and profit.

This paper was accepted by Chris Forman, information systems.
Talking to children about death dying and bereavement – Is it time for a change in the school curriculum?
Authors: Orr Dawn , Henderson Michelle
Published: August 2020

Open and honest communication between families is integral to caring for patients with progressive terminal illnesses. Talking to children about death, dying and bereavement, however, has always been a taboo subject. The specialist palliative care team in Gateshead NHS Foundation Trust share how they succesfully collaborated with a local secondary school to encourage young people to talk about these subjects.
Rainwater Harvesting with Solar and Gravity Powered Irrigation for High Tunnels
Authors: Leib Brian , Wright Wesley , Grant Tim , Haghverdi Amir , Muchoki Duncan , Vanchiasong Phue , Zheng Muzi , Butler David , Wszelaki Annette
Published: August 2020

HIGHLIGHTS

Captured rainwater supplied nearly all the irrigation required for high tunnels in Tennessee.

Solar pumping and/or gravity flow adequately supplied the pressure required for irrigation in high tunnels.

Rainwater harvesting costs need to be reduced in order to be more competitive with alternate water sources.

Abstract
. High tunnels use clear plastic film over a large metal frame to trap solar radiation as heat in order to extend the crop growing season and reduce environmental stress. High tunnels differ from high tech greenhouses in that they use the natural soil as the growing media and use natural ventilation without fans or heaters to control the growing environment. High tunnels can provide some of the benefits of greenhouses at a much lower cost. However, the protective cover cuts-off rain water to the crop and significantly modifies the crop-water use environment. In order to reduce reliance on external sources of water, The University of Tennessee–Biosystems Engineering and Plant Science Departments implemented three types of rainwater harvesting (RWH) for high tunnels that did not require an external source of power for irrigation: gravity flow, solar battery-powered pumping, and solar transfer pumping. RWH by gravity-flow stored water captured off the high tunnels at a high enough elevation to deliver water for irrigation at very low pressure while solar battery-powered pumping delivered pressurized water directly to the irrigation system. Solar transfer pumping moved harvested rainwater to a higher elevation tank that used gravity flow to irrigate at intermediate pressures. These RWH systems were designed to store 64 mm of rainfall from the high tunnel cover (6400 L per 100 m2 of footprint area) and were able to provide 75% to 100% of the spring crop and 90% to 100% of the fall crop irrigation based on 16 experiments over six years. The RWH systems were ranked in order of increasing cost, maintenance, and complexity as follows: 1) gravity flow, 2) solar transfer pumping, and 3) solar battery-powered pumping. However, all RWH systems had high initial cost when compared to well and municipal water supplies, $12,750 to $15,950 for two 9.2- × 29-m high tunnels. Significantly lower cost rain gutters and water storage were identified but not yet tested for RWH in high tunnels. Keywords: Drip irrigation, Evapotranspiration, Gravity irrigation, Greenhouses, High tunnels, Microirrigation, Rainwater harvesting, Solar pumping.
Electrodynamics of a mesoscopic Möbius quantum wire
Authors: Jung Jesper , Keller Ole
Published: August 2020

Microscopic response theory is used to study the linear electromagnetics of a Möbius jellium quantum wire. In the energy range of interest (

ℏ
ω
∼
1

−

200

m
e
V

), the wire can be considered as a Möbius band with complete transverse electron confinement (

∼

one-level quantum well with width

w
∼

k
F

−
1

≪
λ
=
c

/

ω

). The electronic energy eigenvalues and eigenstates are calculated numerically via a diagonalization of a scalar determinant in which the relevant matrix elements of the geometrical potential (given in terms of string curvature and torsion) occur. The exact lowest lying states for a 50 nm long heavily doped GaAs wire are compared to those obtained in lowest-order perturbation theory. The sequence (from the bottom) EOEEOEOO… of the even (E) and odd (O) parity states is not the even–odd sequence EOEOEOEO… of a harmonic potential. The interchanges originate in the peak structure of the geometrical potential. Significant energy splitting of the lowest lying eigenvalues of the Möbius wire is observed when compared to the degenerate energy eigenvalues of a corresponding circular wire. The frequency dependence of the conductivity tensor components are calculated, and the peak structure is identified from the

E
→
E

, and

O
→
O

and

E
↔
O

transitions. It is shown that elastic light scattering might be a versatile probe for determining the Möbius wire’s electronic-state structure.
All-optical flexible 5G signal generation and transmission for spectrum resource optimization
Authors: Karembera Reinhard , Wassin Shukree , Isoe George , Nfanyana Ketshabile , Gibbon Tim
Published: August 2020

As available spectrum gets congested by different applications, spectral efficiency can be enhanced through spectrum sharing and coexistence. In this paper, we demonstrate the idea of spectrum sharing and coexistence by using optical heterodyning as a flex-spectrum photonic RF transmitter. Flexibility was achieved by tuning the RF carrier frequency from 1–5 GHz, frequencies around two spectra from a commercial telecom antenna and from a radio astronomy observatory area. We compared the spectrum of our adopted flex-spectrum photonic RF transmitter with these two practical spectra. This allowed us to demonstrate the feasibility of our adopted photonic RF transmitter to coexist with these distinct spectra. Results indicated that it is feasible to use these adopted photonic transmitters in different application environments for coexistence and spectrum sharing. Error-free 26 km fiber transmission was achieved at 2.1 Gbps and 8.5 Gbps. This further showed the feasibility of these photonic RF transmitters for controlled transfer of different data signals relating to different applications using the same RF channel.
Lightness prediction of mirror display by amending CIECAM02 to include specular reflection
Authors: Jo Jae-Hee , Park YungKyung , Lee Seung-Woo
Published: August 2020

This paper investigates if the color appearance model accurately predicts the lightness of a display whose surface features specular reflection such as a mirror display. Eight observers participate in psychophysical experiments and the results are compared with model prediction value. It is found that the model overestimates the lightness under the average surround condition where there is an intense specular reflection on the display surface. Based on the measurement results, we figured out that the conventional measurement method cannot measure practical specular reflection value. Thus we propose a new measurement method and modify the background parameter to include the specular reflection value. The proposed CIECAM02 considering specular reflection improves the coefficient of variation (CV) value under average surround condition from 20.56 to 12.40 while maintaining CVs under dim and dark surround conditions. In conclusion, we found that people perceive the specular reflection image as a background.
Metasurface-based contact lenses for color vision deficiency: reply
Authors: Karepov Sharon , Ellenbogen Tal
Published: August 2020

The filtering of overlapping spectral regions may be used to increase
the observer’s gamut in some cases. Therefore, metasurface-based
contact lenses (M-CL) may improve the color coding for specific
stimuli and deuteranomaly conditions. Here, we address the concerns
made by Huertas et al. [Opt. Lett. 45, 5117
(2020)OPLEDP0146-959210.1364/OL.394717], regarding the color
perception improvement obtained by color filters, in general, and
specifically by our M-CL, in case of deuteranomaly.
Isolated single-cycle extreme-ultraviolet pulses from undulator radiation
Authors: Rebernik Ribič Primož , Tanaka Takashi
Published: August 2020

We propose a method to generate an isolated single-cycle pulse in the extreme-ultraviolet spectral region using a broadband conventional laser. The uncompressed laser pulse imprints a chirped sinusoid current profile onto a relativistic electron beam. As the beam propagates along a specifically tailored magnetic field of an undulator, it produces an isolated single-cycle pulse. For moderate laser intensities (0.2 mJ per pulse) and typical operating parameters of current electron accelerators, we predict a 26 as, 5 GW peak-power pulse spanning wavelengths down to 15 nm.
Description of normal head structures of the one-humped camel (Camelus dromedarius) by magnetic resonance imaging, computed tomography, and cross-sectional anatomy
Authors: Emam Hassan , Aref Mohamed , Abdelbaset-Ismail Ahmed , Abdelaal Ahmed , Gouda Shaimaa , Gomaa Mohamed
Published: August 2020

Aim: This study was designed for the 1st time to describe the normal head structures of one-humped camel (Camelus dromedarius) using both magnetic resonance imaging (MRI) and computed tomography (CT) as well as cross-sectional anatomy.

Materials and Methods: Five fresh cadaver heads were collected from clinically normal camels and then subjected to T1-weighted MR and CT imaging. Afterward, these examined heads were transversely sliced to obtain seven crossing levels.

Results: The obtained structures per each crossing level were matched with their relevant sorted images of T1-weighted MRI and CT, then identified and labeled accordingly.

Conclusion: The data shown herein expand our knowledge of the normal head structures of the camel and could be used as a reference for ultimate diagnosis of the surgical affections of head using MRI and/or CT.
The use of preoperative embolization as a method of preventing intraoperative hemodynamic disorders in a patient with pheochromocytoma
Authors: Khripun Aleksey I. , Makhuova Gulmira B. , Avdeeva Tatyana F. , Yusufov Magomed P.
Published: August 2020

A clinical case of treating a patient with large pheochromocytoma complicated by acute cerebrovascular accident is presented. Its peculiarity is the implementation of preoperative embolization of the adrenal vessels in order to prevent intraoperative bleeding and intraoperative hemodynamic instability independent risk factors for perioperative complications and mortality. Such an approach allowed us to successfully perform laparoscopic adrenalectomy with minimal blood loss in conditions of stable hemodynamics.
The treatment of patients with pheochromocytoma was discussed, special attention was paid to the category of patients with large tumors. The technical features of adrenalectomy in this group of patients, modern ideas about the safety of laparoscopic interventions are highlighted. The topics of the effectiveness of preoperative drug prevention of blood pressure fluctuations, as well as the use of endovascular methods in the treatment of patients with catecholamine-producing tumors are discussed.
Ovarian adrenal rest tumor in a patient with salt-wasting form of congenital adrenal hyperplasia
Authors: Molashenko Natalia V. , Babaeva Diana M. , Derkatch Dmitriy A. , Vladimirova Victoriya P. , Soldatova Tatiana V. , Vorontsov Alexander V. , Selivanova Liliya S. , Troshina Ekaterina A. , Andreeva Elena N. , Ponomareva Tatyana A.
Published: August 2020

The article describes the clinical case of diagnosing and choosing the tactics for treating ovarian adrenal rest tumors (OART) in a patient with a salt-wasting form of congenital adrenal hyperplasia (CAH). There are only several clinical cases descriptions of OART in the world literature. At present, the tactics of observation and treatment of the ovarian adrenal rest tumors has not been developed. In each case, individual tactics are chosen. The main predisposing factor to the occurrence of OART is considered to be long periods of decompensation of CAH. ACTH stimulates the hyperplasia and hypertrophy of the residual adrenal tissue in the ovaries and secondary tumors develop. The instrumental methods that allow to diagnose OART include ultrasound, MRI of the pelvic organs, PET with 18FDG. The tactics of treating OART, in contrast to the testicular adrenal rest tumors in men (TART), according to world literature are mainly surgical. Organ-preserving operations were performed, as well as the removal of tumors along with the ovary. Cases of a combination of adenocarcinoma and CAH are also described. Each new case of OART is unique and with the accumulation of international experience, a consensus will be developed.
Identificación por catálogo y detección molecular de bovinos Holstein portadores de braquiespina en Uruguay
Authors: ARTIGAS-SILVA Rody , FEDERICI-RODRÍGUEZ María Teresa , VÁZQUEZ-ODO Noelia , ALCÁNTARA-CAPUCHET Mariana , RAMIREZ-FIRPO Mariana , GUERRA-MARTÍNEZ Sofía Martín , DUTRA-QUINTANELA Fernando , LLAMBÍ-DELLACASA Silvia
Published: August 2020

El síndrome de braquiespina es una condición genética de la raza Holstein, detectada en el año 2006. Es causado por una deleción de 3.3 Kb en el gen FANCI localizado en el cromosoma bovino 21. La mutación fue identificada en poblaciones de Holstein de Europa, América del Norte y Asia. Dada la importancia económica del defecto y su amplia distribución mundial, el objetivo de este trabajo ha sido la identificación de animales portadores en el núcleo de selección genética de la raza en Uruguay y el diagnóstico molecular del alelo deletéreo en animales del rodeo nacional. En el presente estudio se analizaron 2598 registros de toros Holstein del catálogo de padres del sistema de evaluación genética lechera, los registros de toros pertenecientes a los catálogos de semen Holstein disponible para Uruguay de los años 2014 al 2018; y 71 vacas pertenecientes al rodeo general. Se encontraron 28 toros portadores de braquiespina de un total de 377 toros con información genética del catálogo de padres y cuatro vacas portadoras de un total de 71 genotipificadas en nuestro laboratorio. Se demostró una disminución en el ingreso de semen de animales portadores al país entre los años 2014 y 2018. La frecuencia significativa de animales portadores en Uruguay evidencia la necesidad de implementar estrategias que permitan eliminar gradualmente el defecto de la población
“Hay que pensar en las historias con h minúscula no con H mayúscula”
Authors: Antolinez Franco Johan Stephen , Hernández Cubides Jairo Andrés
Published: August 2020

El lugar de la memoria en Colombia tiene que ver con el hecho de que somos un país marcado por múltiples conflictos históricos sin resolver sumados a una cultura del olvido. A pesar de este supuesto olvido, el conflicto y la guerra ha pervivido en las formas que tenemos de relacionarnos con nosotros mismos y los otros, esto se puede evidenciar en el lenguaje cotidiano, en las formas del ser y estar, en el comportamiento de la sociedad.
Un caso de desmonstrificación: la lógica siamesa como artefacto crítico cultural en El infarto del alma (2010) de Diamela Eltit y Paz Errázuriz
Authors: Barrios Celiner Ascanio
Published: August 2020

El presente ensayo analiza la categoría cultural “monstruo” como un modo de desarticulación que evidencia la naturalización de los funcionamientos sociales, mediante una representación simbólica a través de la cual se revierte el orden dado. A esta operación estética y cultural de los objetos estéticos la hemos denominado desmonstrificación, asignando esta nueva categoría a aquellas representaciones e intervenciones “monstruosas” que, más que “normar” la diferencia, proponen una mirada crítica. El objeto estético desmonstrificado o portador de la representación e intervención de lo monstruoso funciona como artefacto cultural: como un objeto que, mediante formas heterogéneas, fronterizas, ambiguas, “extrañas”, produce textos que trascienden la noción tradicional del arte, para posicionarse como objetos críticos culturales. En este sentido, la desmonstrificación estética se establece a través de un artefacto cultural que evidencia el funcionamiento de un orden, de los poderes y de la norma. No se trata aquí del cuerpo del monstruo clasificado por la biología, la medicina y/o la ley, sino del artefacto cultural que visibiliza, desnaturaliza y hace delirar los discursos de la biología, la medicina, la política, ley y hasta de la lengua. Para nuestra lectura, nos centraremos en el texto El infarto del alma (2010), de Diamela Eltit y Paz Errázuriz; texto siamés, creado a cuatro manos que pone a dialogar escritura y fotografía desde una posición crítica, con el fin de visibilizar el funcionamiento desmostrificador que dicho texto propone
Power, brokers, and agendas: New directions for the use of social network analysis in education policy
Authors: Hodge Emily , Childs Joshua , Au Wayne
Published: August 2020

In this special issue, Researching 21st Century Education Policy Through Social Network Analysis, authors use social network analysis (SNA) to explore policy networks, broaden the current literature of sociological approaches to SNA, and/or incorporate new lenses for interpreting policy networks from political science or other academic disciplines. This editorial introduction first provides an overview of policy networks and their relevance in education. Then, the editors describe existing work applying the tools of SNA to education policy and highlight understudied areas before describing the articles included in this issue. These articles apply SNA to a variety of education policy issues, including large scale policies such as the Every Student Succeeds Act and the Common Core State Standards, charter schools, and the relationship between system and non-system actors. Articles highlight multiple applications of SNA, including how SNA can be used to advance theory, as well as describe and predict policy networks.
Badanie w działaniu jako metoda badawcza w dydaktyce języków obcych
Authors: Wiśniewska Danuta
Published: August 2020

The purpose of this article is to show how action research is used as a research method in foreign language didactics. Six articles have been chosen from refereed journals and analyzed in respect to such categories as research questions and problems, research aims, the relationship between research participants and researcher, research procedures, data collection methods, results and research quality. This initial analysis reveals that action research studies (1) do not easily fall into one distinct research paradigm, (2) can be both quantitative and qualitative, or mixed, (3) collaboration of research participants is often very limited, and (4) there are problems with quality criteria.
O źródłach motywacji w kontekście edukacji językowej dorosłych
Authors: Róg Tomasz
Published: August 2020

This paper concerns the teaching of foreign languages to adults with special attention given to the concept of motivation. The present author wishes to present the findings of his small-scale research done on a group of adults and their teachers as regards the sources of motivation in the context of adult language instruction. To begin with, an overview of the notion of mo-tivation is followed by its typology and current state of knowledge about teaching languages to adults is briefly outlined. The second part of the arti-cle demonstrates the procedure and results of the study.
Użycie strategii uczenia się gramatyki przez studentów filologii angielskiej
Authors: Pawlak Mirosław
Published: August 2020

Grammar learning strategies can be defined as deliberate actions and thoughts which are employed for learning and gaining greater control over the use of grammar structures (Cohen and Pinilla-Herrera, 2009: 64). This indicates that they are used with the purpose of developing both ex-plicit and implicit second language knowledge. Surprisingly, empirical in-vestigations of such strategic devices are few and far between, with the available studies relying on different classifications and data collection tools, and often producing conflicting results. The present paper contrib-utes to this important line of inquiry by reporting the findings of a re-search project which aimed to explore the use of these strategies by 200 advanced adult learners of English, future teachers of this language en-rolled in a BA program in English philology. The data were collected by means of an instrument designed by the present author (Pawlak, 2009c, 2010, 2011) on the basis of his taxonomy of such strategic devices and, similarly to earlier studies in this area (e.g. Pawlak 2008, 2009a), the analy-sis showed that the choice of grammar learning strategies hinges upon a number of variables and there are differences between the responses to Likert scale items and open-ended questions. The results serve as a basis for tentative suggestions for grammar instruction in modern languages departments and directions for future research.
Dyskurs edukacyjny w klasie językowej z perspektywy teorii społeczno-kulturowej
Authors: Rokoszewska Katarzyna
Published: August 2020

The present paper focuses on classroom discourse from the perspective of Sociocultural Theory. This theory, represented mainly by Vygotsky (1978), Leont'ev (1978) and Wertsch (1985), has been applied to second language acquisition by researchers such as Lantolf (1994). Firstly, the paper presents the view of language and language learning and the main constructs in sociocultural SLA, such as mediation through social interaction, mediation by means of private speech, internalization, the zone of proximal development, and Activity Theory. The methodology of sociocultural research is also taken into consideration. Secondly, the paper describes a number of studies into classroom discourse which are discussed in reference to the constructs mentioned above. Thirdly and finally, the paper provides some evaluation of the theory in question.
Big data and reference intervals: rationale, current practices, harmonization and standardization prerequisites and future perspectives of indirect determination of reference intervals using routine data
Authors: Martinez-Sanchez Luisa , Marques-Garcia Fernando , Ozarda Yesim , Blanco Albert , Brouwer Nannette , Canalias Francesca , Cobbaert Christa , Thelen Marc , den Elzen Wendy
Published: August 2020

Reference intervals are commonly used as a decision-making tool. In this review, we provide an overview on “big data” and reference intervals, describing the rationale, current practices including statistical methods, essential prerequisites concerning data quality, including harmonization and standardization, and future perspectives of the indirect determination of reference intervals using routine laboratory data.
New Data on the Eclipsing Binary V1848 Ori and Improved Orbital and Light Curve Solutions
Authors: Davoudi Fatemeh , Poro Atila , Alicavus Fahri , Halavati Afshin , Doostmohammadi Saeed , Shahdadi AmirAbbas , Vahedi Sareh , Pishahang Arman , Zare Maryam , Jamali Milad , Salajeghe AmirMohammad , Jahediparizi Faezeh , Ashta Hassan , Shojaatalhosseini Seyed Mohsen
Published: August 2020

New observations of the eclipsing binary system V1848 Ori were carried out using the V filter resulting in a determination of new times of minima and new ephemeris were obtained. We presented the first complete analysis of the system’s orbital period behavior and analysis of O-C diagram done by the GA and MCMC approaches in OCFit code. The O-C diagram demonstrates a sinusoidal trend in the data; this trend suggests a cyclic change caused by the LITE effect with a period of 10.57 years and an amplitude of 7.182 minutes. It appears that there is a third body with mass function of f (m
3) = 0.0058 M⊙ in this binary system. The light curves were analyzed using the Wilson-Devinney code to determine some geometrical and physical parameters of the system. These results show that V1848 Ori is a contact W UMa binary system with the mass ratio of q = 0.76 and a weak fillout factor of 5.8%. The O’Connell effect was not seen in the light curve and there is no need to add spot.
„Lust ja, aber keine Zeit!“: Publikationsverhalten von Bibliothekaren und Informationswissenschaftlern
Authors: Keller Alice
Published: August 2020

Dieser Artikel geht der Frage nach, aus welcher Motivation heraus Fachpersonen der Bibliotheks- und Informationswissenschaften in wissenschaftlichen Zeitschriften publizieren und welche Barrieren sie daran hindern, (häufiger) zu publizieren. Zusätzlich wird untersucht, ob diese Personen in anderen Publikations- und Medienkanälen publizieren und wie ihre Einstellung zu Open Access ist. Ein Überblick über das Angebot und die Open Access Verfügbarkeit deutschsprachiger Zeitschriften des Fachgebiets ergänzt das Bild.
Hybrid model for fault detection and diagnosis in an industrial distillation column
Authors: Picabea Julia , Maestri Mauricio , Cassanello Miryan , Horowitz Gabriel
Published: August 2020

The present work describes a method of automatic fault detection and identification based on a hybrid model (HM): First Principles – Neural Network. The FPM can simulate a wide range of situations while the NN corrects the model output using information from the historical data of the process. Operating conditions corresponding to different types of faults were simulated with the HM and saved with their description in a process state library. To detect a fault, the online measured data was compared with that corresponding to the operation under normal conditions. If a significant deviation was detected, the current state was compared with all the states stored in the process state library and it was identified as the one at the shortest distance. The method was tested with real data from a methanol-water industrial distillation column. During the studied period of operation of the plant, two faults were identified and reported. The proposed method was able to identify such failures more effectively than an equivalent model of first principles. The results obtained show that the proposed method has a great potential to be used in the automatic diagnosis of faults in refining and petrochemical processes.
On the regular-convexity of Ricci shrinker limit spaces
Authors: Huang Shaosai , Li Yu , Wang Bing
Published: August 2020

In this paper we study the structure of the pointed-Gromov–Hausdorff limits of
sequences of Ricci shrinkers. We define a regular-singular decomposition
following the work of Cheeger–Colding for manifolds with a uniform Ricci
curvature lower bound, and prove that the regular part of any non-collapsing
Ricci shrinker limit space is strongly convex, inspired by Colding–Naber’s
original idea of parabolic smoothing of the distance functions.
A machine learning-based approach for estimating and testing associations with multivariate outcomes
Authors: Benkeser David , Mertens Andrew , Colford John M. , Hubbard Alan , Arnold Benjamin F. , Stein Aryeh , van der Laan Mark J.
Published: August 2020

We propose a method for summarizing the strength of association between a set of variables and a multivariate outcome. Classical summary measures are appropriate when linear relationships exist between covariates and outcomes, while our approach provides an alternative that is useful in situations where complex relationships may be present. We utilize machine learning to detect nonlinear relationships and covariate interactions and propose a measure of association that captures these relationships. A hypothesis test about the proposed associative measure can be used to test the strong null hypothesis of no association between a set of variables and a multivariate outcome. Simulations demonstrate that this hypothesis test has greater power than existing methods against alternatives where covariates have nonlinear relationships with outcomes. We additionally propose measures of variable importance for groups of variables, which summarize each groups’ association with the outcome. We demonstrate our methodology using data from a birth cohort study on childhood health and nutrition in the Philippines.
Aircraft Gearbox Fault Diagnosis System: An Approach based on Deep Learning Techniques
Authors: Mallikarjuna P B , Sreenatha M , Manjunath S , Kundur Niranjan C
Published: August 2020

Gearbox is one of the vital components in aircraft engines. If any small damage to gearbox, it can cause the breakdown of aircraft engine. Thus it is significant to study fault diagnosis in gearbox system. In this paper, two deep learning models (Long short term memory (LSTM) and Bi-directional long short term memory (BLSTM)) are proposed to classify the condition of gearbox into good or bad. These models are applied on aircraft gearbox vibration data in both time and frequency domain. A publicly available aircraft gearbox vibration dataset is used to evaluate the performance of proposed models. The results proved that accuracy achieved by LSTM and BLSTM are highly reliable and applicable in health monitoring of aircraft gearbox system in time domain as compared to frequency domain. Also, to show the superiority of proposed models for aircraft gearbox fault diagnosis, performance is compared with classical machine learning models.
On reverse Hölder and Minkowski inequalities
Authors: Zhao Chang-Jian , Cheung Wing Sum
Published: August 2020

In the paper, we give new improvements of the reverse Hölder and Minkowski integral inequalities. These new results in special case yield the Pólya-Szegö’s inequality and reverse Minkowski’s inequality, respectively.
Demonstration of biaxially tensile-strained Ge/SiGe multiple quantum well (MQW) electroabsorption modulators with low polarization dependence
Authors: Gao Jianfeng , Sun Junqiang , Jiang Jialin , Zhang Yi
Published: August 2020

We demonstrate a novel biaxially tensile-strained Ge/SiGe multiple quantum well (MQW) electroabsorption modulator with low polarization dependence. The device is waveguide integrated and has a length of 900 μm. Suspended microbridge structure is utilized to introduce biaxial tensile strain to the Ge/Si0.19Ge0.81 MQWs. Light is coupled into and out of the waveguide through deeply etched facets at the ends of the waveguide. Both TE and TM polarized electroabsorption contrast ratios are tested by the use of polarization maintaining focusing lensed fiber and a linear polarizer. A polarization irrelevant contrast ratio of 4.3 dB is achieved under 0 V/2 V operation. Both simulations and experiments indicate that the demonstrated device has potential in waveguide integrated utilizations that have high requirements on polarization uniformity.
On-chip arbitrary-mode spot size conversion
Authors: Qi Wei , Yu Yu , Zhang Xinliang
Published: August 2020

Manipulating on-chip optical modes via components in analogy with free-space devices provides intuitional light control, and this concept has been adopted to implement single-lens–assisted spot size conversion using integrated device. However, the reported schemes have been demonstrated only for fundamental mode, while high-order or irregular modes are preferred in specific applications. The 4-f system is widely used in Fourier optics for optical information processing. Under the inspiration of the 4-f system and the beam expander in bulk optics, a spot size converter (SSC) with two metamaterial-based graded-index waveguides is proposed and demonstrated. The proposed device is capable of widening an arbitrary mode while preserving its profile shape. Compared with conventional SSC using adiabatic taper, the footprint can be reduced by 91.5% under a same intermode crosstalk. Experimentally, an expansion ratio of five is demonstrated for regular modes. Furthermore, for an irregular mode, the functionality is numerically verified without structure modification. This work offers a universal solution to on-chip spot size conversion and may broaden the on-chip application prospects of Fourier optics.
Arbitrary polarization conversion for pure vortex generation with a single metasurface
Authors: Piccardo Marco , Ambrosio Antonio
Published: August 2020

The purity of an optical vortex beam depends on the spread of its energy among different azimuthal and radial modes, also known as $\ell $- and p-modes. The smaller the spread, the higher the vortex purity and more efficient its creation and detection. There are several methods to generate vortex beams with well-defined orbital angular momentum, but only few exist allowing selection of a pure radial mode. These typically consist of many optical elements with rather complex arrangements, including active cavity resonators. Here, we show that it is possible to generate pure vortex beams using a single metasurface plate—called p-plate as it controls radial modes—in combination with a polarizer. We generalize an existing theory of independent phase and amplitude control with birefringent nanopillars considering arbitrary input polarization states. The high purity, sizeable creation efficiency, and impassable compactness make the presented approach a powerful complex amplitude modulation tool for pure vortex generation, even in the case of large topological charges.
Social Security and robotization: Possible ways to finance human reskilling and promote employment
Authors: Díaz Alfredo , Grau Ruiz María Amparo
Published: August 2020

This contribution aims to open the discussion on how to balance the opportunities and the risks posed by the increased robotization of the economy. It particularly addresses the concerns related to the sustainability of the current Social Security systems. Having in mind the quick process of skill depreciation, it is urgent to incentivize workers’ training and human employment. Some ways already used in the past to finance similar goals are reviewed here in order to show possible solutions to be adapted in the near future within the European Union in line with the guidelines given by several international institutions.
Analysis Trade Integration of Indonesia and Turkey Non-Oil Sector
Authors: Yuliati Lilis , Atmaja Purna Pria , Lestari Endah Kurnia
Published: August 2020

Development of the economy and improve the world economy which is increasing in the future. This causes an increase in trade in the same sector (Intra-Industrial Trade). In addition, promoting trade that focuses on fluctuating and unstable pushes Indonesia to further enhance its export competitiveness through market diversification, encouraging to minimize export fluctuations towards the main export destination countries. Commitment to a market diversification strategy has made Turkey an alternative export destination. The purpose of this research is to study the great integration of trade and export dynamics in the non-oil sector between Indonesia and Turkey during the period 2001-2016. Analysis using Gruble Lloyd Index (GLI) shows that the intensity of trade between Indonesia and Turkey is more in the category of Weak Integration (Weak Integration). While the analysis of the Constant Market Share (CMS) shows that each period is fluctuating, in the first period, the second period, the second period, the fourth period, the questioning period, the sixth period, the ninth period, the tenth period, and the second positive period, while in the seventh period , the eighth period, the eleventh period, the fourteenth period, and the twelve period of negative export value changes.
Economic Growth in Indonesian New Outonomous: Social-Economic Perspective
Authors: Rochmatullah Mahameru Rosy , Winarna Jaka , Gantyowati Evi
Published: August 2020

This study explores the Indonesian economic growth in the new autonomous regions using social - economy perspective. More specifically, social - economic issues are proxied on population, poverty rates, education levels, local tax revenues, and distribution of local government social assistance. Meanwhile, community economic growth is proxied by GRDP per capita (PE). The Indonesian economic growth and social-economy issues are measured using Ordinary Least Square (OLS). This study uses new autonomous regions data in Indonesia formed in 2003 – 2008. Employing multiple linear regression, the test results revealed that variable of local tax revenue (PD) was consistently able to explain PE. The same results are shown in the robustness test, where researchers predict the economic growth of the community with the Human Development Index (HDI). In the discussion section, community economic growth represented by PE continues to increase along with the increase in PD and HDI. The conclusion in this study is community economic growth increased since 2009, marked by an increase in PD along with HDI. As an implication, researchers suggest that practitioners and academics use local taxes to measure the community economy in new autonomous regions in Indonesia.