bluuebunny/crossref_metadata_2025 huggingface dataset:
Χαρισματικά παιδιά : Αυτοεκτίμηση και σχολική υποεπίδοση
Authors: Κούρτη Παναγιώτα , Μαλαματένια Μαρία
Published: August 2020

Σκοπός της παρούσας εργασίας αποτελεί η διερεύνηση μέσω βιβλιογραφικής ανασκόπησης, της αυτοεκτίμησης των χαρισματικών παιδιών και της συσχέτισης της χαρισματικότητας με την ακαδημαϊκή τους πορεία .Ως χαρισματικά, ορίζονται τα παιδιά τα οποία έχουν μία ή περισσότερες νοητικές ικανότητες και ταλέντα, αναπτυγμένα σε βαθμό που υπερβαίνει τα προσδοκώμενα για την ηλικιακή τους ομάδα. Αυτοεκτίμηση είναι η εικόνα που έχει ο καθένας για τον εαυτό του και η  αίσθηση της αξίας του. Σε ορισμένες μελέτες καταγράφεται θετική αυτοεικόνα και υψηλή αυτοεκτίμηση για την ακαδημαϊκή επιτυχία στα χαρισματικά παιδιά, ενώ σε άλλες δυσαρέσκεια σε σχέση με τις προσωπικές επιδόσεις και αρνητική αυτοεικόνα. Επίσης, παρατηρείται συχνά αναντιστοιχία νοητικού δυναμικού και σχολικής επίδοσης. Παράγοντες ατομικοί και περιβαλλοντικοί φαίνεται να διαδραματίζουν σημαντικό ρόλο στη σχολική υποεπίδοση των χαρισματικών παιδιών. Στους ατομικούς συγκαταλέγονται ο διαφορετικός τρόπος προσέγγισης της μάθησης, η δυσκολία στη σύναψη φιλικών σχέσεων με συνομηλίκους, η εξωτερική έδρα ελέγχου, η χαμηλή αυτοεκτίμηση, οι υψηλές προσδοκίες από τον εαυτό και τους άλλους. Στην υποεπίδοση συμβάλλει η έλλειψη προκλήσεων στο σχολικό περιβάλλον και το συμβατικό σχολικό πλαίσιο. Επιπροσθέτως, μια κατηγορία μαθητών που μπορεί να εμφανίσει χαμηλά επίπεδα σχολικής επιτυχίας είναι οι «διπλά ιδιαίτεροι μαθητές», όρος ο οποίος αναφέρεται στα χαρισματικά παιδιά με ειδικές εκπαιδευτικές ανάγκες. Η χάραξη εκπαιδευτικής πολιτικής προσαρμοσμένης στις ιδιαιτερότητες των χαρισματικών μαθητών, κρίνεται αναγκαία κι επιβεβλημένη.
ΤΑ ΧΑΡΑΚΤΗΡΙΣΤΙΚΑ ΤΩΝ ΣΠΟΥΔΑΣΤΩΝ ΑΤΟΜΙΚΟΥ ΠΑΡΑΔΟΣΙΑΚΟΥ ΜΟΥΣΙΚΟΥ ΟΡΓΑΝΟΥ ΚΑΙ ΟΙ ΑΠΟΨΕΙΣ ΤΟΥΣ ΓΙΑ ΤΗΝ ΑΡΙΣΤΗ ΔΙΔΑΣΚΑΛΙΑ
Authors: Μαστροκώστα Δέσποινα Μαρία , Τάχος Σταύρος , Στάμου Λήδα
Published: August 2020

Αφορμή για την παρούσα έρευνα αποτέλεσαν οι προβληματισμοί και τα βιώματα της γράφουσας στο αντικείμενο της μάθησης και διδασκαλίας του παραδοσιακού μουσικού οργάνου μέσα από ατομικά μαθήματα. Η εργασία βασίζεται στο ευρύτερο θεωρητικό πλαίσιο που αφορά στα χαρακτηριστικά των σπουδαστών ατομικού παραδοσιακού μουσικού οργάνου (μαθητές μουσικών σχολείων /φοιτητές/ μαθητές ωδείων) και τις απόψεις τους για την άριστη διδασκαλία. Το δείγμα αποτέλεσαν 236 σπουδαστές παραδοσιακών μουσικών οργάνων, εκ των οποίων 158 ήταν μαθητές μουσικών σχολείων ηλικίας 12 έως 18 ετών, 59 ήταν προπτυχιακοί φοιτητές πανεπιστημιακών μουσικών τμημάτων και 19 ήταν σπουδαστές ωδείων. Οι συμμετέχοντες στο δείγμα απάντησαν σε γραπτό ερωτηματολόγιο που κατασκευάστηκε από την ερευνήτρια. Επιπλέον, 15 μαθητές ενός μουσικού σχολείου από το δείγμα της έρευνας, συμμετείχαν σε μια ομάδα εστίασης (focus group), προκειμένου να σχηματιστεί μία πιο ολοκληρωμένη εικόνα σχετικά με την άποψη των μαθητών για το πώς πραγματικά θέλουν τον καθηγητή τους στη διδασκαλία του παραδοσιακού ατομικού οργάνου. Παρουσιάζονται τα αποτελέσματα που προκύπτουν από την έρευνα και παρατίθενται συμπεράσματα και προτάσεις για τη βελτίωση της μουσικής διδασκαλίας.
«Η Αξιοποίηση του Παραμυθιού και του Θεατρικού παιχνιδιού στην Εργοθεραπευτική Παρέμβαση στο Νηπιαγωγείο»
Authors: Παπακίτσου Βασιλική Ι.
Published: August 2020

Η παρούσα εργασία αποτελεί μία εργοθεραπευτική παρέμβαση που αξιοποιεί δημιουργικά μορφές της Τέχνης, ως μέσα θεραπείας, σε μαθητές με Μαθησιακές Δυσκολίες και ΔΕΠ-Υ,  Ιδιωτικού Νηπιαγωγείου του νομού Αττικής. Οι εκπαιδευόμενοι σε συνεργασία με την εκπαιδεύτρια δημιούργησαν ομάδες με ειδικά σχεδιασμένα εκπαιδευτικά προγράμματα, προσαρμοσμένα στα ιδιαίτερα χαρακτηριστικά, τις ικανότητες και τις δυσκολίες των μαθητών. Ο ρόλος της εργοθεραπείας αποδεικνύεται εξαιρετικά σημαντικός βοηθώντας και υποστηρίζοντας  συστηματικά, οργανωμένα και αποτελεσματικά τα παιδιά που παρουσιάζουν ποικίλες ψυχοκοινωνικές, συναισθηματικές,  γνωστικές δυσλειτουργίες.  Το παραμύθι, το θεατρικό παιχνίδι, το παιχνίδι ρόλων, συνιστούν τα πλέον κατάλληλα μέσα  προκειμένου ο εργοθεραπευτής,  αξιοποιώντας τα κατάλληλα, να ενισχύσει την αυτοπεποίθηση των παιδιών, να βοηθήσει στον αγώνα τους για προσαρμογή, αναπλήρωση και ανεξαρτητοποίηση. Στόχος είναι οι μαθητές/τριες  να  κοινωνικοποιηθούν, να καλλιεργήσουν δεξιότητες γλωσσικές, γνωστικές, ψυχοκοινωνικές, ομαδικού  πνεύματος, οπτικοκινητικού συντονισμού. Παράλληλα, να κατανοούν τη συμβολική – μεταφορική διάσταση της γλώσσας, κινητοποιώντας  τους μηχανισμούς προβολής και ταύτισης, έκφρασης, διαχείρισης και επεξεργασίας συναισθημάτων και ενδοψυχικών συγκρούσεων. Επιλέχθηκαν τα έργα:  Παραμύθια: Αισώπου Μύθοι: «Ο Ψεύτης Βοσκός». Τριβιζά: «Τα τρία μικρά λυκάκια». Ποίημα: Γ. Δροσίνη: «Η Αλεπού Καλόγρια». Μουσική: Μελοποιημένο το ποίημα και επιλεγμένα αποσπάσματα σε μουσική Τ. Μωράκη.
«Η προσέγγιση της διαπολιτισμικής εκπαίδευσης μέσω της παιδικής λογοτεχνίας»
Authors: Σακίδη Άρτεμις
Published: August 2020

Η Ελλάδα του 21ου αιώνα δεν έχει την ίδια κοινωνική σύνθεση με τις δεκαετίες του 1980 και του 1990. Έτσι τα σύγχρονα σχολεία δέχονται στους κόλπους τους μαθητές διαφορετικής καταγωγής και κουλτούρας και καλούνται μέσω των εκπαιδευτικών να τους εντάξουν και να τους παρωθήσουν να αλληλεπιδράσουν στα πλαίσια εφαρμογής μιας διαπολιτισμικής εκπαίδευσης, που δεν έχει ως μοναδικό σκοπό την απλή συνύπαρξη των μαθητών, αλλά την επικοινωνία και τον αλληλοσεβασμό. Βοηθητικό εργαλείο για τους εκπαιδευτικούς μπορεί να αποτελέσει η παιδική λογοτεχνία (ή και τα παραμύθια) με διαπολιτισμικό περιεχόμενο, το οποίο προβάλει τη σημασία του σεβασμού και της αποδοχής του «άλλου». Η λογοτεχνία μέσω φιλαναγνωστικών δραστηριοτήτων που αξιοποιούν μεταξύ άλλων τη μουσική, το θέατρο και το παιχνίδι μπορεί να ενώσει τους μαθητές και να μετριάσει τις διαφορές.Η εργασία αυτή αποσκοπεί κυρίως: ♦ στη διασάφηση των εννοιών της πολυπολιτισμικότητας και της διαπολιτισμικότητας στην εκπαίδευση,♦ στην ανάδειξη της συμβολής της λογοτεχνίας στη διαπολιτισμική εκπαίδευση, καθώς και στη παρουσίαση κατάλληλων παιδικών έργων,♦ στην προώθηση και εφαρμογή της λογοτεχνίας στις πολυπολιτισμικές σχολικές τάξεις.
Διαταραχή Αυτιστικού Φάσματος- Μια μελέτη περίπτωσης
Authors: Τσομπόλη Ειρήνη
Published: August 2020

Η Διαταραχή Αυτιστικού Φάσματος (ΔΑΦ) είναι μία εγκεφαλική διαταραχή, οργανικής αιτιολογίας που αφορά διαταραχές και ελλείματα στην κοινωνικοποίηση, τη λεκτική και μη λεκτική επικοινωνία και των περιορισμένων και επαναληπτικών μοτίβων συμπεριφοράς, λόγω περιορισμένης δημιουργικής φαντασίας. Η παρούσα εργασία αποτελεί μελέτη ενός παιδιού το οποίο είναι 13 ετών και βρίσκεται στο φάσμα του αυτισμού. Ο μαθητής Χ αντιμετωπίζει ποικίλα προβλήματα, συμπεριλαμβάνοντας προβλήματα συμπεριφοράς, κοινωνικότητας και επικοινωνίας. Σκοπός αυτής της εργασίας είναι να αναδειχθούν οι μέθοδοι παρέμβασης, προβάλλοντας ταυτόχρονα τα υπέρ και τα κατά και εν τέλει να καθοδηγήσουν κάθε εμπλεκόμενο και ενδιαφερόμενο σε νέους δρόμους με θετικά αποτελέσματα. Υπάρχουν ποικίλες παιδαγωγικές προσεγγίσεις και πρακτικές που μπορούν να εφαρμοσθούν για να βοηθήσουν τα παιδιά που βρίσκονται στο φάσμα του αυτισμού. Ωστόσο πριν την εφαρμογή οποιασδήποτε μεθόδου και προσέγγισης, είναι σημαντικό να γίνει έγκαιρη διάγνωση και σωστή αξιολόγηση. Στη συγκεκριμένη περίπτωση μαθητή το πρόγραμμα που χρησιμοποιήθηκε ήταν αυτό της Εφαρμοσμένης Ανάλυσης Συμπεριφοράς (Applied Behavioral Analysis- A.B.A) που στοχεύει στην εξάλειψη των ανεπιθύμητων συμπεριφορών και στην ενίσχυση των επιθυμητών συμπεριφορών.
The identification of needs and development of best practice guidance for the psychological support of frontline healthcare workers during and after COVID-19: A protocol for the FLoWS project
Authors: Flynn Jack , O'Connor Laura , Hanlon Michelle , Bellani Giacomo , Contreras Maya , Doherty Anne , Durand Hannah , Fallon Elaine , Gormley Clare , Laffey John , Molloy Gerry , Sarma Kiran , Strepparava Maria Grazia , Russo Selena , Walsh Jane , McGuire Brian E.
Published: August 2020

Recent estimates suggest that up to 34% of frontline workers in healthcare (FLWs) at the forefront of the COVID-19 pandemic response are reporting elevated symptoms of psychological distress due to resource constraints, ineffective treatments, and concerns about self-contamination. However, little systematic research has been carried out to assess the mental health needs of FLWs in Europe, or the extent of psychological suffering in FLWs within different European countries of varying outbreak severity. Accordingly, this project will employ a mixed-methods approach over three work packages to develop best-practice guidelines for alleviating psychological distress in FLWs during the different phases of the pandemic. Work package 1 will identify the point and long-term prevalence of psychological distress symptoms in a sample of Irish and Italian FLWs, and the predictors of these symptoms. Work package 2 will perform a qualitative needs assessment on a sample of Irish and Italian FLWs to identify sources of stress and resilience, barriers to psychological care, and optimal strategies for alleviating psychological distress in relation to the COVID-19 pandemic. Work package 3 will synthesise the findings from the preceding work packages to draft best practice guidelines, which will be co-created by a multidisciplinary panel of experts using the Delphi method. The guidelines will provide clinicians with a framework for alleviating psychological distress in FLWs, with particular relevance to the COVID-19 pandemic, but may also have relevance for future pandemics and other public health emergencies.
Managing the Impact of Fitting Room Traffic on Retail Sales: Using Labor to Reduce Phantom Stockouts
Authors: Lee Hyun Seok (Huck) , Kesavan Saravanan , Deshpande Vinayak
Published: August 2020

Problem definition: Brick-and-mortar (B&M) retailers must enhance the customer in-store experience to better compete with online retailers. Fitting rooms in B&M stores play a critical role in the customer experience as a venue to experience products and examine alternatives. High traffic in fitting rooms, however, obstructs the customer’s ability to choose a product. In this paper, we (1) examine the impact of fitting room traffic on store performance using archival data, (2) identify phantom stockouts as a plausible mechanism for this impact, and (3) provide a potential solution and quantify the magnitude of its impact using two field experiments. Academic/practical relevance: The consumer purchase decision process framework has been widely used in disciplines such as marketing and information systems. We consider the impact of high traffic in fitting rooms on customer’s purchase decision process. We show that high traffic in fitting rooms affects store sales negatively as it can obstruct customers’ ability to perform information search, evaluation of alternatives, or both. Methodology: We use archival data analysis, a field study, and a field experiment to demonstrate our findings. Results: We demonstrate an inverted-U relationship between fitting room traffic and sales using archival data analysis. Our field study reveals that high traffic in fitting rooms exacerbates phantom stockouts, which could contribute to the decline in sales. Finally, through field experiments at two retailers, we show that a timely backend recovery operation through a dedicated fitting room associate reduces phantom stockouts and increases sales by 22.4%–22.7%. Managerial implications: First, contrary to conventional wisdom that traffic drives sales, we identify that fitting room traffic beyond a certain point can hurt store sales. Second, we find a large magnitude of phantom stockouts in fitting rooms. Finally, we show that dedicated fitting room labor can significantly boost store sales by alleviating phantom stockouts. Our proposed solution was adopted by both retail organizations that we worked with.
COVID-19 in schools: Infection control, personal protective equipment and the latest CPR advice
Authors: Hammett Emma
Published: August 2020

There are a number of challenges in order to safely return more children to school. Emma Hammett provides an overview of the latest guidance on infection control, personal protective equipment and CPR for educational settings.
Implantation of cryopreserved umbilical cord allograft in hard-to-heal foot wounds: a retrospective study
Authors: Raphael Allen , Grimes Laura
Published: August 2020

Objective:

The objective of this study was to assess the clinical effectiveness of surgically implanted cryopreserved human umbilical cord allograft in treating hard-to-heal wounds with and without osteomyelitis.

Method:

In this single-centre, retrospective investigation, wounds (average size 6.9±10.1cm2) were included for analysis that had failed prior standard wound care for an average of 14.4±8.0 weeks.

Results:

After surgical implantation of cryopreserved umbilical cord between the deep tissue planes, 20 (95%) of the 21 wounds included in the study achieved complete closure in a median time of 7.8 weeks (range: 1–68) despite presence of residual osteomyelitis in 15 cases. A total of 12 wounds (57.1%) healed by 12 weeks, and 16 (76.2%) wounds healed by 24 weeks. A patient who presented with a limb-threatening calcaneal ulcer that was complicated by osteomyelitis at the time of treatment required subsequent amputation. No adverse events or complications related to cryopreserved umbilical cord were observed.

Conclusion:

The results suggest that surgical implantation of cryopreserved umbilical cord allograft may be a safe and effective treatment in improving healing of hard-to-heal wounds. Further prospective, randomised controlled trials are warranted.
Power Shift Control of High-Power Tractor Based on Pattern Search
Authors: Xia Guang , Yu Xinghai , Tang Xiwen , Zhao Linfeng , Sun Baoqun
Published: August 2020

Highlights

This article presents a multiobjective optimization function of power shift quality that uses the calculation formulas of sliding wear work, impact degree, and output torque derived from the analysis of split-phase dynamics.

The calculation formulas of impact degree, sliding wear work, and output torque of each phase are derived, and a three-factor evaluation system of power shift quality is constructed.

A pattern-search-based optimization method of power shift quality is proposed on the basis of the three-factor evaluation system of power shift quality.

The power shift control based on pattern search algorithm optimizes the shift quality evaluation indexes and effectively improves the power shift quality of high-power tractors.

Abstract
. This study conducts a dynamic analysis of power shift by analyzing the key influencing factors of power shift quality. The power shift process is divided into low gear torque, sliding wear, and high gear torque phases. The calculation formulas of impact degree, sliding wear work, and output torque of each phase are derived, and a three-factor evaluation system of power shift quality is constructed. A pattern-search-based optimization method of power shift quality is proposed on the basis of the three-factor evaluation system of power shift quality. A multi-objective optimization function of shift quality is constructed using the linear change law expression of clutch oil pressure and the calculation of shift quality evaluation indexes of each phase. The multi-objective function is pretreated using a weighted coefficient method, and the change rule of clutch oil pressure is accurately optimized. Simulation and experimental results show that the power shift control based on pattern search algorithm optimizes the evaluation indexes of each shift quality and effectively improves the power shift quality of high-power tractors. Keywords: Pattern search, Power shift, Shift quality, Split-phase dynamics.
Propagation properties and radiation forces of the Hermite–Gaussian vortex beam in a medium with a parabolic refractive index
Authors: Wu You , Wu Jinhong , Lin Zejia , Fu Xinming , Qiu Huixin , Chen Kaihui , Deng Dongmei
Published: August 2020

In this paper, an analytical expression with a triple sum of the Hermite–Gaussian vortex beam (HGVB) propagating in a medium with a parabolic transverse spatial distribution of the refractive index is carried out. The intensity, phase, Poynting vector, and angular momentum of the HGVB are demonstrated analytically. The parabolic parameter, orders of the HGVB, and vortex topological charge affect the propagation properties, respectively. Also, the Poynting vector and angular momentum of the HGVB are shown so that we can further discover the properties. Furthermore, radiation forces are used to demonstrate the optical trapping ability of the HGVB, and several trapping positions are formed by the beam during propagation.
Retinal choroidal vessel imaging based on multi-wavelength fundus imaging with the guidance of optical coherence tomography
Authors: Huang Zhiyu , Jiang Zhe , Hu Yicheng , Zou Da , Yu Yue , Ren Qiushi , Liu Gangjun , Lu Yanye
Published: August 2020

A multispectral fundus camera (MSFC), as a novel noninvasive technology, uses an extensive range of monochromatic light sources that enable the view of different sectional planes of the retinal and choroidal structures. However, MSFC imaging involves complex processes affected by various factors, and the recognized theory based on light absorption above the choroid is not sufficient. In an attempt to supplement the relevant explanations, in this study, we used optical coherence tomography (OCT), a three-dimensional tomography modality, to analyze MSFC results at the retina and choroid. The swept-source OCT system at 1060 nm wavelength with a 200 kHz A-scan rate and an MSFC with 11 bands at 470 to 845 nm are employed. A quantitative evaluation procedure is proposed to compare MSFC and OCT en face images. The comparative study shows that 1) the MSFC images with the illumination wavelength of less than 605 nm could mainly provide the retinal structure information; 2) Relative choroidal layer thickness information could be inferred from the MSFC images, especially the image acquiring under the wavelength more than 605 nm. According to the results, further investigation revealed the contribution of the perivascular tissue and the sclera scattering in the difference of vascular brightness in MSFC images.
Single-pass Cr:ZnSe amplifier for broadband infrared undulator radiation
Authors: Andorf M. B. , Lebedev V. A. , Piot P.
Published: August 2020

An amplifier based on a highly-doped chromium zinc-selenide (Cr:ZnSe) crystal is proposed to increase the pulse energy emitted by an electron bunch after it passes through an undulator magnet. The primary motivation is a possible use of the amplified undulator radiation emitted by a beam circulating in a particle accelerator storage ring to increase the particle beam’s phase-space density—a technique dubbed optical stochastic cooling (OSC). This paper uses a simple four energy level model to estimate the single-pass gain of Cr:ZnSe and presents numerical calculations combined with wave-optics simulations of undulator radiation to estimate the expected properties of the amplified undulator wave-packet.
Numerical simulations on a nanosecond-pulse exciplex pumped cesium vapor laser
Authors: Su Chenyi , Xu Xingqi , Huang Jinghua , Pan Bailiang
Published: August 2020

A theoretical model is established to describe the kinetic processes and laser mechanism for a nanosecond-pulse exciplex pumped Cs vapor laser (XPCsL). A new simulation method is proposed to solve a set of non-stationary rate equations considering high energy levels and the results of simulation are consistent with the experimental data. The effects of cell temperature, pump energy and buffer gas on the output laser pulses are presented and analyzed in detail, which reveal the unique properties of nanosecond-pulse XPCsL.
Encoding the complete electric field of an ultraviolet ultrashort laser pulse in a near-infrared nonlinear-optical signal
Authors: Jones Travis , Peters William K. , Efimov Anatoly , Sandberg Richard L. , Yarotski Dmitry , Trebino Rick , Bowlan Pamela
Published: August 2020

We introduce a variation on the cross-correlation frequency-resolved optical gating (XFROG) technique that uses a near-infrared (NIR) nonlinear-optical signal to characterize pulses in the ultraviolet (UV). Using a transient-grating XFROG beam geometry, we create a grating using two copies of the unknown UV pulse and diffract a NIR reference pulse from it. We show that, by varying the delay between the UV pulses creating the grating, the UV pulse intensity-and-phase information can be encoded into a NIR signal. We also implemented a modified generalized-projections phase-retrieval algorithm for retrieving the UV pulses from these spectrograms. We performed proof-of-principle measurements of chirped pulses and double pulses, all at 400 nm. This approach should be extendable deeper into the UV and potentially even into the extreme UV or x-ray range.
Line scanning mechanical streak camera for phosphorescence lifetime imaging
Authors: Wang Chenmao , Cheng Zongyue , Gan Wenbiao , Cui Meng
Published: August 2020

Phosphorescence lifetime measurement holds great importance in life sciences and material sciences. Due to the long lifetime of phosphorescence emission, conventional approaches based on point scanning time-domain recording suffer from long recording time and low signal-to-noise ratio (SNR). To overcome these difficulties, we developed a line scanning mechanical streak camera for parallel and high SNR imaging. This design offers three key advantages. First, hundreds to thousands of pixels can be recorded simultaneously at high throughput. Second, hundreds of excitation can be accumulated on a single camera frame and read out at once with high quantum efficiency (QE) and low read noise. Third, the system is very simple, only requiring a camera and a scanner. Using a confocal line scanning configuration, we imaged samples of various lifetime ranging from tens of nanoseconds to hundreds of microseconds, which demonstrated the versatility and advantages of this method.
Ultra-precise optical-frequency stabilization with heterogeneous III–V/Si lasers
Authors: Stern Liron , Zhang Wei , Chang Lin , Guo Joel , Xiang Chao , Tran Minh A. , Huang Duanni , Peters Jonathan D. , Kinghorn David , Bowers John E. , Papp Scott B.
Published: August 2020

The demand for low-noise, continuous-wave, frequency-tunable lasers based on semiconductor integrated photonics has advanced in support of numerous applications. In particular, an important goal is to achieve a narrow spectral linewidth, commensurate with bulk-optic or fiber-optic laser platforms. Here we report on laser-frequency-stabilization experiments with a heterogeneously integrated III/V-Si widely tunable laser and a high-finesse, thermal-noise-limited photonic resonator. This hybrid architecture offers a chip-scale optical-frequency reference with an integrated linewidth of 60 Hz and a fractional frequency stability of

2.5
×

10

−
13

at 1 s integration time. We explore the potential for stabilization with respect to a resonator with lower thermal noise by characterizing laser-noise contributions such as residual amplitude modulation and photodetection noise. Widely tunable, compact and integrated, cost-effective, stable, and narrow-linewidth lasers are envisioned for use in various fields, including communication, spectroscopy, and metrology.
High-energy, tunable, long-wave mid-infrared optical parametric oscillator based on BaGa4Se7 crystal
Authors: Xu Degang , Zhang Jiaxin , He Yixin , Wang Yuye , Yao Jiyong , Guo Yangwu , Yan Chao , Tang Longhuang , Li Jining , Zhong Kai , Wu Yicheng , Yao Jianquan
Published: August 2020

A high-energy, tunable, long-wave mid-infrared optical parametric oscillator (OPO) based on the

B
a
G

a

4

S

e

7

crystal was demonstrated in this Letter with 1064 nm laser pumping. The mid-infrared OPO was designed as a double-pass single resonant oscillator (DP-SRO) to reduce the threshold and improve the outputs. Further optimization on the cavity length was theoretically and experimentally studied. With a short cavity length of 30 mm, the output energy of over 1 mJ/pulse at 11 µm was obtained with the pump energy of 39.5 mJ/pulse. In addition, a wide tuning range of 8–14 µm was experimentally achieved by rotating the

B
a
G

a

4

S

e

7

crystal.
Fiber Bragg grating sensing system with wavelength-swept-laser distribution and self-synchronization
Authors: Sung Jiun-Yu , Chen Jin-Kai , Liaw Shien-Kuei , Kishikawa Hiroki , Goto Nobuo
Published: August 2020

Fiber Bragg gratings (FBGs) with various interrogation schemes to estimate the FBG’s spectrum shift have been widely used in fiber sensing systems. Wavelength swept laser (WSL) based interrogation architectures have been proposed to offer rapid and high-quality sensing performance. However, for getting higher sensing accuracy, the demands for high-performance WSL may push the system cost. Under these considerations, a WSL distribution architecture allowing multiple sensing processing units (SPUs) to share the WSL is studied in this Letter. A self-synchronization scheme is proposed to enable flexible SPU deployment with no concerns for the clock calibration. The proposed system is experimentally studied. Temperature estimation error of

∼

2.5

∘

C

and

∼

0.5

∘

C

with sensitivities of 0.13°C/ms and 0.14°C/ms, respectively, for the high and small temperature ranges are demonstrated.
Optics-free imaging of complex, non-sparse and color QR-codes with deep neural networks
Authors: Nelson Soren , Scullion Evan , Menon Rajesh
Published: August 2020

We demonstrate optics-free imaging of complex color and monochrome QR-codes using a bare image sensor and trained artificial neural networks (ANNs). The ANN is trained to interpret the raw sensor data for human visualization. The image sensor is placed at a specified gap (1mm, 5mm and 10mm) from the QR code. We studied the robustness of our approach by experimentally testing the output of the ANNs with system perturbations of this gap, and the translational and rotational alignments of the QR code to the image sensor. Our demonstration opens us the possibility of using completely optics-free, non-anthropocentric cameras for application-specific imaging of complex, non-sparse objects.
The effect of Channa striata extract and standard eradication regimen on asymmetric dimethylarginine in Helicobacter pylori gastritis rat model
Authors: Yulizal OK , Lelo Aznan , Ilyas Syafruddin , Kusumawati Raden Lia
Published: August 2020

Background and Aim: The presence of gastric mucosa or submucosa inflammation due to Helicobacter pylori leads to histological changes. Gastric injury, pro-inflammatory factors, and oxidative stress in H. pylori infection produce asymmetric dimethylarginine (ADMA), which are a competitive inhibitor of nitric oxide synthase. Investigations were carried out aimed at finding new drugs derived from natural products for the treatment of H. pylori. Channa striata is known to have in vitro anti-inflammatory and antimicrobial properties. This study aimed to investigate the effect of C. striata extract and a standard eradication regimen on ADMA levels and histological changes in the H. pylori gastritis rat model.

Materials and Methods: Thirty-five male rats were randomly and equally divided into five groups. Group-1 was the negative control group and Groups-2 to 5 were H. pylori-infected groups. Groups-3 to 5 were administered C. striata extract, a standard eradication regimen, and a combination of standard eradication regimen and C. striata extract, respectively. Histological examination and serum ADMA levels were analyzed. The difference between groups was analyzed using the Kruskal–Wallis and one-way analysis of variance tests. The significance was p<0.05.

Results: Serum ADMA levels and severity of gastritis were higher in infected groups compared to the negative control group (p<0.05). The severity of gastritis and mean ADMA levels in the group that received a single administration of the C. striata extract was higher than the others (p<0.05). Serum ADMA levels and severity of gastritis were significantly reduced in the group that received a combination of standard eradication regimen and C. striata extract (p<0.05).

Conclusion: Single administration of C. striata extract worsens the severity of gastritis and increased serum ADMA levels in the H. pylori gastritis rat model. The administration of a combination of standard eradication regimen and C. striata extract reduces serum ADMA levels and significantly improves the severity of H. pylori gastritis rat model.
Papaya (Carica papaya L.) seed as a potent functional feedstuff for poultry – A review
Authors: Sugiharto Sugiharto
Published: August 2020

The steady increase in the price of protein feed ingredients and the retraction of antibiotics from diets has encouraged nutritionists to search the alternatives for protein source and functional feedstuffs that can substitute the role of antibiotic growth promoters in poultry production. With crude protein of 24-30%, in vitro protein digestibility of 80% and proportion of essential amino acids of 47%, seed from ripe papaya may be exploited as the alternative protein feed ingredient for poultry. Moreover, the growth promoting effect, antimicrobial and antiparasitic activities, and immunomodulatory and antioxidative activities may confirm the potential of papaya seed as a functional feedstuff that could replace the role of antibiotic growth promoters for poultry. The in-depth study is needed to further elucidate the functionalities of papaya seed on poultry. This review provides the updates on the nutritional contents of papaya seed, the potential of papaya seed as an alternative to conventional protein-rich ingredient, the growth-promoting effect of feeding papaya seed, the antimicrobial and antiparasitic activities of papaya seed, antioxidative activities of papaya seed, and the immunomodulatory activity of papaya seed on poultry.
Promising immunohistochemical and circulating markers of insulinoma
Authors: Yukina Marina Yu. , Selivanova Liliya S. , Nuralieva Nurana F. , Troshina Ekaterina A. , Izmailova Natalya S. , Abrosimov Aleksandr Yu.
Published: August 2020

Insulinoma is the most common functioning pancreatic neuroendocrine tumor. The review examines the currently used immunohistochemical and circulating markers for its diagnosis, and discusses the sensitivity and specificity of these parameters. At the same time, the relevance of searching for new biochemical indicators of the presence of insulinoma and its characteristics, as well as studying the mechanisms of tumor growth and hormonal hypersecretion is emphasized. One of the primary methods for solving these problems is immunohistochemical testing with the determination of circulating markers. The results of recent studies of alternative secretory products, in particular, cocaine - and amphetamine - regulated transcript (CART), chromogranin B, and neuroendocrine secretory protein 55 (NESP55) are presented. In addition, the question of expression of various receptors in the insulinoma tissue is considered, including in the context of determining molecular targets for its visualization or radiotherapy. In particular, the expression of receptors for glucagon-like peptide 1 in the tumor tissue is characterized. The possible role of melatonin receptors MT1 (MTNR1a) and MT2 (MTNR1b) in the pathogenesis of insulinoma is clarified. The article also discusses the possible use of tumor protein D52 (TPD52) as a new predictive biomarker for the differential diagnosis of benign and malignant insulinoma.
Extractos de las Hojas de Salvia Officinalis y Sambucus Peruviana H.B.K. como Inhibidores de Incrustaci´on
Authors: Castillo Campos Luis Antonio , Barreto Steevenson José
Published: August 2020

Contexto: El fen´omeno de formaci´on de las incrustaciones se ha convertido en uno de los problemas operacionales con mayor frecuencia de ocurrencia en la industria petrolera, y la b´usqueda de fuentes innovadoras de mitigaci´on ha resultado ser el horizonte al cual han apuntado las empresas del ´area. Por ello, en esta investigaci´on se eval´ua el efecto antiincrustante que presentaron los extractos de las hojas de Salvia officinalis y Sambucus peruviana H.B.K.

M´etodo: Se realiz´o la caracterizaci´on fisicoqu´ımica de una muestra de agua de producci´on del Campo Oritupano y se obtuvieron los extractos, para luego ser identificadas sus propiedades f´ısicas. Posterior a ello, se determin´o el desempe˜no inhibitorio de cada producto natural en conjunto con un agente comercial, todo a trav´es de la aplicaci´on de la Norma NACE TM0374-2007, adem´as de aplicar un an´alisis estad´ıstico para visualizar las diferencias significativas que pudiesen estar presentes entre las eficiencias experimentales y comerciales.

Resultados: Los extractos de Salvia officinalis y Sambucus peruviana H.B.K empleados como antiincrustantes exteriorizaron resultados de pH de car´acter ´acido y viscosidades por debajo de los 2 cSt, mostrando rendimientos m´aximos de 87,27% y 90,91% para las soluciones a base de sa´uco y salvia respectivamente, y comportamientos estad´ısticos similares al producto comercial referencial.

Conclusiones: En t´erminos cuantitativos, el prospecto a base de salvia result´o m´as efectivo al evaluarlo en la muestra de agua de producci´on del Campo Oritupano, mostrando un comportamiento directamente proporcional concentraci´on-eficiencia, adem´as de exponerse con caracter´ısticas m´as acordes a un bioinhibidor de incrustaciones de carbonato de calcio, aunque con proporci´on de s´olidos que deber´ıan disminuirse a´un m´as, requiriendo que en un futuro se mejore esta caracter´ıstica y se pueda medir la acci´on conjunta de ambos extractos en la prevenci´on de las incrustaciones, tanto experimentalmente como en campo.
Topologies for Battery and Supercapacitor Interconnection in Residential Microgrids with Intermittent Generation
Authors: Narvaez Cubillos Eider Alexander , Cortés Guerrero Camilo Andrés , Trujillo Rodríguez Cesar Leonardo
Published: August 2020

Context:This paper presents a comparative study of the performance of three topologies for interconnecting Lithium ion batteries and supercapacitors in a hybrid energy storage system for use in electric residential microgrids with intermittent generation. The hybrid system’s main purpose is to prolong battery life, using the supercapacitor to handle the dynamic component of current from a pulsed current load. This work builds upon a preliminary simulation-based study, in which two semi-active topologies were compared and evaluated. Here, we add an active topology to the study and describe the operational benefits of each topology.

Method:For every topology in this study, a non-isolated half-bridge bidirectional DC converter was used, and a proportional–integral (PI) double-loop linear ACC control algorithm was designed for controlling the converters. In the active topology an additional optimisation-based real-time frequencydecoupling control strategy was employed.

Results:A parallel active topology allows better management of stored energy in the SC by supporting variation of SC terminal voltages with a DC converter as interface to the DC bus.

Conclusions: Semi-active topologies are easier to design and control, but the operational benefits of supercapacitors require voltage variation at the terminals. This variation is made possible with an active topology.

Acknowledgements: First author thanks Universidad Distrital Francisco Jos´e de Caldas for the financial support in his doctoral studies through the study commission contract N° 000101-2016.
Participación ciudadana: acción política y pluralidad en el acuerdo de paz en Colombia
Authors: Urrego Gleidy Alexandra , Betancur Luisa Fernanda
Published: August 2020

El posible acuerdo de paz en Colombia entre el Gobierno Nacional y el grupo insurgente FARC-EP (Fuerzas Armadas Revolucionarias de Colombia – Ejército del Pueblo) implica la necesidad de problematizar la participación ciudadana en clave del pensamiento de Hannah Arendt sobre una política de la vida y la muerte relacionados con la acción y la pluralidad de todos los actores de la esfera de los asuntos humanos. Es una investigación hermenéutica con enfoque cualitativo que considera la participación ciudadana en clave del pensamiento arendtiano de la política de la vida y la muerte que tiende a la acción política, la democracia y la paz dialogada. Por tanto, la pluralidad de los hombres siempre ha sido la clave para fortalecer los estados democráticos. La incidencia de una acción política ciudadana en un proceso de paz identifica la legitimación de todo un colectivo que aporte de manera pública unos consensos significativos para poder ejecutar un posconflicto con todas las posibilidades sociales.
Narrativas testimoniales: poéticas de la alteridad
Authors: Gauta Brayan Sebastián
Published: August 2020

En este sentido, Narrativas testimoniales: poéticas de la alteridad es una escritura colectiva en donde convergen las reflexiones, experiencias, sentires y propuestas educativas de las maestras e investigadoras Jeritza Merchán, Clara Castro, Lorena Garzón y Piedad Ortega, mujeres que le han apostado a la construcción de una escuela crítica, humana y militante de la vida, la memoria y la transformación de las prácticas y los discursos hegemónicos y retardatarios.; es por ello que el presente libro es una invitación a caminar juntos y construir utopías en la transición política que se puede vislumbrar en el horizonte del posacuerdo, pactado entre la guerrilla de las Farc-Ep y el Gobierno Nacional.
Editorial
Authors: Hernández Cubides Jairo Andrés
Published: August 2020

Seguros de haber transmitido todo el conocimiento, reflexiones y análisis de nuestros autores y autoras invitados, como parte del compromiso que tiene el Instituto para La Pedagogía, La Paz y el Conflicto Urbano–IPAZUD, en la arquitectura de espacios investigativos, académicos y de reflexión a través de las ideas escritas. Agradecemos a nuestro público lector su apoyo y compañía durante tantos años de trabajo y presentamos este volumen de nuestra publicación, construido con el empeño y la convicción de transmitir a través de sus letras, todo el saber que en ella se consigna, poniendo así su conocimiento al servicio de la paz.
Enseñanza de las humanidades en la modalidad a distancia: reflexión desde la Universidad Santo Tomás
Authors: Patiño Montero Freddy
Published: August 2020

Este artículo presenta los resultados de una investigación desarrollada en el Área de Humanidades de la VUAD de la USTA[1]. Trata el problema de la enseñanza de las Humanidades, su incidencia en la formación humana y ciudadana, en los estudiantes de la Facultad de Ciencias y Tecnologías. La investigación se desarrolla en dos momentos. El primero de carácter teórico, a través del Seminario Alemán. Y, el segundo metodológico, en el cual se presentan el diseño de la muestra, la encuesta y los criterios para su aplicación y análisis de resultados. Finalmente, en las conclusiones se destaca una valoración favorable en la concepción de los estudiantes sobre el aporte de este tipo de asignaturas en su formación personal y profesional.

[1] Vicerrectoría de Universidad Abierta y a Distancia, de la Universidad Santo Tomás.
Pensar la enseñanza de la historia reciente desde la conciencia histórica
Authors: Escobar Rincón Liliana del Pilar
Published: August 2020

El presente trabajo se articula en el marco del proyecto de tesis doctoral titulado la conciencia histórica y la enseñanza del conflicto armado colombiano: un análisis de los libros de texto escolar de ciencias sociales (1984-2016) y busca consolidar elementos teóricos y metodológicos para abordar la enseñanza de la historia reciente desde la inclusión de la categoría de conciencia histórica para establecer su cruce en el escenario escolar.
El sistema financiero en Colombia: una historia por contar
Authors: Leguizamón Ana María , Romero Astrid Viviana
Published: August 2020

El protagonismo de la Asociación Bancaria de Colombia en la promoción, la contribución al conocimiento y diseño de la política monetaria y financiera nacional habla por sí sola de la creciente influencia de la banca privada en el país y de la profundización financiera que este sector ha facilitado. El proyecto conjunto liderado por el diario Portafolio, líder en información de economía y negocios y La asociación gremial financiera colombiana (Asobancaria) de esquematizar y registrar minuciosamente la historia del sistema financiero, se articula con la academia para desarrollar un insumo para la investigación y el estudio de las políticas públicas que han caracterizado la estructura económica del país.
Cuerpo, política y memoria. Conflictos, resistencias y prácticas corporales
Authors: Betancourth Elizabeth López , Mora Ana Sabrina , Sáez Mariana
Published: August 2020

a“Ubi Sunt (¿Dónde están los que vivieron?). Las cosas que tocamos no saben que nos fuimos” es una intervención artística realizada por el Grupo de Estudio sobre Cuerpo (GEC-UNLP), que tuvo lugar en los subsuelos del Museo de Ciencias Naturales de La Plata (Argentina). Quienes realizamos esta performance recorreremos las distintas etapas de su constitución, basada en una investigación en la que utilizamos tanto herramientas del método etnográfico, como otras provenientes de las prácticas escénicas y estrategias de escenificación. Este cruce de metodologías tuvo influencia además en el modo en que registramos la performance y evaluamos sus resultados. Proponemos un análisis sobre Ubi Sunt ligado a los afectos en los participantes y a los roles de las experiencias afectivas y sensorio-corporales en la constitución de la memoria, mediante el poder evocador de espacios, objetos, sonidos, palabras y presencias de los cuerpos en una escena cotidiana y a la vez extrañada.
Del paso de la guerra a las resistencias corporales
Authors: Conde Rivera Gaviota Marina
Published: August 2020

El presente artículo surge como una reflexión del término de violencia y sus ramificaciones en el marco de las guerras contemporáneas, en particular del conflicto armado colombiano y como a pesar de sus impactos sobre los cuerpos de las mujeres víctimas, han surgido formas de resignificar la vida.
Cuerpos en el psiquiátrico, la mirada y la cámara: la locura visible del siglo XIX
Authors: Del Busto Meira
Published: August 2020

La fotografía fue vista como una “emanación mágica”, donde quedaría por fin plasmada esa interioridad que antaño era atribuida a la acción de seres intangibles y extraños movimientos del espíritu que producían la locura. En este trabajo, se busca indagar sobre la relación entre el discurso psiquiátrico del siglo XIX y la producción de imágenes, en la constitución de un régimen visual científico. Las fotografías que se traen al análisis, coinciden con el nacimiento de una especie de objetividad mecánica, donde los modos de ver están de lleno mediatizados por la novedad del aparato fotográfico, considerado como aparato informativo, que soporta los procedimientos científicos de demostración, comparación e ilustración sobre el cuerpo del “paciente mental”.
From policy networks to policy preferences: Organizational networks in the opt-out movement
Authors: Green Saraisky Nancy , Pizmony-Levy Oren
Published: August 2020

Organizational networks shape education policy by influencing power holders and elites, but do they have similar effects on grassroots activists? We use data from the National Survey on Opting Out (2016 and 2018; n = 2,909) to examine the role of organizational networks in mobilizing activists in the opt-out movement (a movement in which parents and caregivers refuse to have their children sit for standardized tests). Despite characterizations of the opt-out movement as a bunch of “soccer moms” disappointed with their children’s test scores, our findings show that opt-out is in fact a structured movement reliant on social movement organizations (SMOs) with agendas that go beyond standardized tests. Further, we demonstrate a small but significant correlation between contact with SMOs and individual policy preferences. These patterns suggest that organizational networks may inform education policy by creating a social space for activists to learn about different policy ideas in education. We discuss implications for research and practice.
Plasma amino acid levels in a cohort of patients in Turkey with classical phenylketonuria
Authors: Halil Kazanasmaz , Meryem Karaca
Published: August 2020

Background

In patients with phenylketonuria, the central nervous system is adversely affected by noncompliance with diet. The levels of phenylalanine and many different amino acids (AAs) in the plasma of patients with phenylketonuria can be measured simultaneously.

Objectives

To measure the blood plasma levels of neurotransmitter AAs in a cohort of patients in Sanliurfa province, Turkey, with phenylketonuria for use as a support parameter for the follow-up of patients.

Methods

The phenylketonurics that we followed (n = 100) were divided into 2 groups according to their compliance with their dietary treatment. Plasma AA analysis results of phenylketonurics were compared with those of healthy children in a control group (n = 50).

Results

In the diet incompliant group (n = 56), the mean levels of γ-aminobutyric acid (GABA; 0.96 ± 1.07 μmol/L) and glycine (305.1 ± 105.19 μmol/L) were significantly higher than those in the diet compliant group (n = 44; GABA P = 0.005, glycine P < 0.001) and in the control group (GABA and glycine P < 0.001), whereas the mean levels of glutamic acid (39.01 ± 22.94 μmol/L) and asparagine (39.3 ± 16.89 μmol/L) were lower (P < 0.001) in the diet incompliant group. A positive correlation was observed between the levels of phenylalanine and GABA and glycine. A negative relationship was found between the levels of phenylalanine and glutamic acid and asparagine.

Conclusions

A relationship exists between the levels of plasma phenylalanine in a cohort of phenylketonurics in Sanliurfa province, Turkey, and the levels of some excitatory and inhibitory AAs. Excitatory and inhibitory AA levels in plasma may be used as support parameters in the follow-up of patients with phenylketonuria.
Geschäftsprozesse im Fachreferat
Authors: Grützner Agnes , Kohl-Frey Oliver
Published: August 2020

Der vorliegende Aufsatz befasst sich mit einer Analyse der Geschäftsprozesse im Fachreferat an der Universität Konstanz. Dazu werden zunächst die Rahmenbedingungen an der Universität Konstanz dargestellt, insbesondere die durch die Fusion von Bibliothek und Rechenzentrum zum Kommunikations-, Informations-, Medienzentrum (KIM) entstandenen Veränderungen. Nach einem kurzen allgemeinen Überblick über Geschäftsprozesse werden die Vorgehensweise und die Ergebnisse der Konstanzer Analyse vorgestellt. Abschließend wird der weitere Umgang mit den Ergebnissen sowie das praktische Vorgehen diskutiert.
OCR-D kompakt: Ergebnisse und Stand der Forschung in der Förderinitiative
Authors: Engl Elisabeth
Published: August 2020

Bereits seit einigen Jahren werden große Anstrengungen unternommen, um die im deutschen Sprachraum erschienenen Drucke des 16.–18. Jahrhunderts zu erfassen und zu digitalisieren. Deren Volltexttransformation konzeptionell und technisch vorzubereiten, ist das übergeordnete Ziel des DFG-Projekts OCR-D, das sich mit der Weiterentwicklung von Verfahren der Optical Character Recognition befasst. Der Beitrag beschreibt den aktuellen Entwicklungsstand der OCR-D-Software und analysiert deren erste Teststellung in ausgewählten Bibliotheken.