bluuebunny/crossref_metadata_2025 huggingface dataset:
Revisiting two notable methods for improving the deblending performance of marine towed-streamer acquisition
Authors: Chen Yangkang , Zhou Min , Abma Ray
Published: February 2024

Marine towed-streamer blended data are usually challenging to deblend because of the low dimensionality of the data. Although the present ocean-bottom-cable (OBC) surveys produce well-sampled 3D receiver gathers, towed-streamer data have a lower sparsity in the transformed f- k domain. Here, we revisit two practical strategies to improve deblending performance. In the first strategy, we revisit applying 3D deblending to 2D surveys, which considers the shot domain as a sparsity-constrained domain. We compare the sparseness of the 2D and 3D fast Fourier transform (FFT) transformed domains by drawing the coefficients’ decaying curves. The 3D FFT transformed domain is much sparser than the 2D FFT transformed domain, according to the sparseness comparison. Thus, 3D deblending can obtain better performance than 2D deblending. In the second strategy, we revisit an improved deblending approach that combines traditional deblending and popcorn reconstruction as well as other methods of coding sources. The popcorn shooting technique adds an extra level of constraint to the inversion because each source is coded with a different popcorn pattern. Thus, when deblending, convolution and deconvolution for each source with a predefined popcorn pattern will attenuate the interference that does not belong to the selected source. For the scenarios revisited here, we use synthetic and field data examples with different complexity to demonstrate their superior performance.
Sunitinib in Patients With Breast Cancer With FGFR1 or FGFR2 Amplifications or Mutations: Results From the Targeted Agent and Profiling Utilization Registry Study
Authors: Calfa Carmen J. , Rothe Michael , Mangat Pam K. , Garrett-Mayer Elizabeth , Ahn Eugene R. , Burness Monika L. , Gogineni Keerthi , Rohatgi Nitin , Al Baghdadi Tareq , Conlin Alison , Gaba Anu , Hamid Omid , Krishnamurthy Jairam , Gavini Naga Jyothi , Gold Philip J. , Rodon Jordi , Rueter Jens , Thota Ramya , Grantham Gina N. , Hinshaw Dominique C. , Gregory Abigail , Halabi Susan , Schilsky Richard L.
Published: February 2024

PURPOSE

The Targeted Agent and Profiling Utilization Registry Study is a phase II basket trial evaluating the antitumor activity of commercially available targeted agents in patients with advanced cancer and genomic alterations known to be drug targets. Results from cohorts of patients with metastatic breast cancer (BC) with FGFR1 and FGFR2 alterations treated with sunitinib are reported.

METHODS

Eligible patients had measurable disease, Eastern Cooperative Oncology Group performance status 0-2, adequate organ function, and no standard treatment options. Simon's two-stage design was used with a primary end point of disease control (DC), defined as objective response (OR) or stable disease of at least 16 weeks duration (SD16+) according to RECIST v1.1. Secondary end points included OR, progression-free survival, overall survival, duration of response, duration of stable disease, and safety.

RESULTS

Forty patients with BC with FGFR1 (N = 30; amplification only n = 26, mutation only n = 1, both n = 3) or FGFR2 (N = 10; amplification only n = 2, mutation only n = 6, both n = 2) alterations were enrolled. Three patients in the FGFR1 cohort were not evaluable for efficacy; all patients in the FGFR2 cohort were evaluable. For the FGFR1 cohort, two patients with partial response and four with SD16+ were observed for DC and OR rates of 27% (90% CI, 13 to 100) and 7% (95% CI, 1 to 24), respectively. The null hypothesis of 15% DC rate was not rejected ( P = .169). No patients achieved DC in the FGFR2 cohort ( P = 1.00). Thirteen of the 40 total patients across both cohorts had at least one grade 3-4 adverse event or serious adverse event at least possibly related to sunitinib.

CONCLUSION

Sunitinib did not meet prespecified criteria to declare a signal of antitumor activity in patients with BC with either FGFR1 or FGFR2 alterations. Other treatments and clinical trials should be considered for these patient populations.
Height Restoration for Vertebra Plana Using a Mechanical Lamellar Vertebral Body Reduction Device: 2-Dimensional Operative Video
Authors: Ramadani Fatos , Valsecchi Daniele , Goga Cristina , Otten Philippe , Maestretti Gianluca
Published: February 2024

Compression fractures of thoracolumbar vertebra are the most common vertebral fracture.
1
Associated with osteoporosis, the compression can progress until reach vertebra plana and cause a kyphosis.
2
The reduction of the fresh fracture and restoration of the height are the purposes of the kyphoplasty.
3
We present a modified technique adapted for the treatment of vertebral plana using a mechanical flexible lamellar vertebral body reduction device (Tektona, Spinart).
4

We present the case of a 77-year-old woman with back pain after a fall. The radiological investigations show a compressive fracture type AO A1 of T7. After an initial conservative management, the patient presented persistence of the pain with a visual analog scale of 9/10 and progression of the fracture at the 2-week follow-up. On the x-ray, focal kyphosis with vertebra plana was observed. A kyphoplasty for pain management and kyphosis correction was performed. The patient consented to the procedure.

A bipedicular approach to the vertebra was performed. The correction of the height was done using 2 mechanical devices. The lamellar device allowed a progressive height restoration of the fracture. On one side, the cannula was used as a support to maintain the correction during the contralateral cementing. The postoperative imaging confirmed a maintained vertebral restoration with kyphosis correction. At 1 year, the patient reported a pain at 1 of 10 on the visual analog scale.

In our opinion, this technique is adapted for fresh osteoporotic vertebral compression fractures. Surgical experience in osteoporotic fracture treatment and kyphoplasty is recommended before the management of vertebra plana.
Ο όρκος και η προσευχή στο δημόσιο βίο του σύγχρονου Ελληνικού κράτους
Authors: Μακρής Ιωάννης
Published: February 2024

Με την παρούσα διδακτορική διατριβή επιχειρείται η έρευνα δύο διαχρονικών πτυχών του χριστιανισμού, του όρκου και της προσευχής, οι οποίες τόσο παλαιότερα όσο και στην σύγχρονη ελληνική κοινωνία αποτελούν τα κυριότερα σύμβολα της θρησκευτικής λατρείας. Η παρουσία του όρκου και της προσευχής στον ελληνικό δημόσιο βίο είναι αδιαμφισβήτητη και μέσα από την διερευνητική εργασία που πραγματοποιήθηκε καταδεικνύεται αφενός η ιστορική τους σημασία και αφετέρου η επιρροή τους στην καθιέρωση της χριστιανικής πίστης ως την επικρατούσα θρησκεία της Ελλάδος. Τούτο δε αποδεικνύεται από την έντονη παρουσία των θρησκευτικών αυτών φαινομένων στις ενέργειες της ελληνικής δημόσιας διοίκησης και δικαιοσύνης, ενώ έμφαση δίδεται στην νομική τους διάσταση και την σύνδεσή τους με κοινωνικά και ατομικά δικαιώματα, τα οποία κατοχυρώνονται στο ελληνικό Σύνταγμα αλλά και από διεθνή νομοθετικά κείμενα. Κεντρικό σημείο έρευνας αποτελεί η σχέση Κράτους και Εκκλησίας που σε κάθε περίπτωση αποτελεί εφαλτήριο για την ύπαρξη και εξέλιξη των φαινομένων θρησκευτικής λατρείας στην σύγχρονη ελληνική κοινωνία, η οποία τείνει να διαμορφώνει μια πορεία προς την θρησκευτική ουδετερότητα και παράλληλα να αποδέχεται πλήρως την χριστιανική θρησκεία ως σημαντικό σημείο του πολιτισμού. Επιπρόσθετα, σε κάθε ενότητα της διδακτορικής διατριβής επιχειρείται η παρουσίαση των διδαγμάτων του Χριστού και των μαθητών του, που εντοπίζονται στα θρησκευτικά κείμενα της Καινής Διαθήκης, της Παλαιάς Διαθήκης και σε άλλες περγαμηνές των χριστιανικών κηρύκων. Καταληκτικά, το συμπέρασμα της διδακτορικής έρευνας εστιάζει στο δεδομένο ότι η σύγχρονη ελληνική κοινωνία παραμένει συνδεδεμένη με τις θρησκευτικές παραδόσεις και τις λατρευτικές εκδηλώσεις, καθιστώντας σαφές ότι μέσω αυτών οι πιστοί επιθυμούν να διατηρήσουν ζωντανή την επικοινωνία τους με τον Θεό.
Deposition of Sn-Zr-Se precursor by thermal evaporation and PLD for the synthesis of SnZrSe3 thin films
Authors: Kondrotas Rokas , Bereznev Sergei , Volobujeva Olga , Muska Katri , Pakštas Vidas , Klimas Vaclovas , Talaikis Martynas , Juškėnas Remigijus , Krotkus Arūnas
Published: February 2024

Background ABX3 (X=Se, S) chalcogenides are an emerging class of materials for sustainable photovoltaics. Among ABX3 materials, BaZrS3 has gained the highest community interest. BaZrS3 is the wide bandgap absorber (> 1.7 eV) and therefore is intended for application as a top sub-cell in multijunction devices. However, narrow band gap ABX3 compounds have drawn little attention although this could potentially open the path for fabrication of multijunction solar cells based entirely on ABX3 materials. SnZrSe3 is a narrow bandgap semiconductor with an absorption edge located at around 1.0 eV, but there are no reports on the formation of SnZrSe3 thin films thus far. In this work, therefore, we aim to obtain SnZrSe3 thin films by sublimation methods. Methods Thermal evaporation and pulsed laser deposition (PLD) techniques were used to deposit Sn-Zr-Se precursor films. SnZrSe3 powder was synthesized and used as a source material for evaporation and PLD target preparation. Precursor films were deposited by PLD from single-phase and binary selenide targets. Results We found that using SnZrSe3 powder, only SnSe films were deposited under various conditions by thermal evaporation. Precursor films obtained by PLD from single-phase targets were amorphous and comprised SnSe2 and a-Se phases whereas using binary targets crystalline SnSe and a-Se were detected. Thermogravimetric analysis revealed that SnZrSe3 was thermally stable up to 450 °C and afterwards decomposed into SnSe, Se and ZrSe2-x. Conclusions Using methods described in this work, we were not able to achieve congruent sublimation of SnZrSe3 because of the following reasons: (i) upon energetic excitation, SnZrSe3 decomposes into compounds with very different vapour pressure; (ii) inability to substitute O with Se due to very high chemical affinity of Zr and O. Direct sublimation methods are challenging for formation of SnZrSe3 thin films and other techniques, such as co-evaporation should be explored.
Chronic migraine prevention from the perspective of a family doctor: a literature review
Authors: Żymła Tatiana , Pokładnik Dominika , Szczerba Jakub , Podsiedlik Adam , Poloczek Alicja , Stefanowicz Agata , Jeleń Katarzyna , Pokora Szymon , Sojka Paweł , Pokora Karolina
Published: February 2024

Chronic migraine is a disease that significantly reduces the quality of life of patients. It affects millions of people around the world, and is common particularly among young women. Family physicians often encounter the problem of migraine headaches in their daily practice. The diagnostic problem results from absence of tests or imaging studies that can clearly indicate the cause of the headache. In order to establish a diagnosis and exclude secondary sources of pain, doctors focus on a detailed medical history and analysis of symptoms presented over time. Preventive treatment of migraine requires appropriate drug selection after weighing the benefits and risks for each patient. This review paper presents and briefly discusses selected pharmacological and non-pharmacological methods used in migraine prevention. They were selected by searching the PubMed Internet database. The presented non-pharmacological methods include the use of nutraceutics, acupuncture and behavioral therapy. The discussed pharmacological methods include treatment with beta-blockers, topimarate, flunarizine or one of the latest methods - the use of monoclonal antibodies against CGRP. In addition, the use of botulinum toxin type A in the treatment of chronic migraine has also been demonstrated. It should be remembered that the type of therapy chosen should be individualized: according to the patient's preferences, treatment effectiveness, possible side effects or accompanying diseases. Proper management of chronic migraine prophylaxis can significantly improve the quality of life of patients and reduce the frequency of headache attacks.
Nutrition Strategies for Optimizing Performance and Health in Young Athletes
Authors: Woźniak Kinga , Hedesz Patryk , Żuk-Łapan Aleksandra , Jung Magdalena , Gardian-Baj Monika , Popczyńska Justyna , Doryń Aleksandra , Jung Maximilian , Babula Emilia , Włodarczyk Aleksandra , Taras Andrzej
Published: February 2024

Introduction: The increasing participation of young individuals in sports necessitates a comprehensive understanding of the intricate relationship between nutrition and athletic performance during the critical adolescent years. This introduction sets the stage for an exploration of the dynamic nutritional needs of young athletes, emphasizing the pivotal role of nutrition in supporting growth, energy metabolism, and overall athletic achievement.

Current State of Knowledge: The current state of knowledge encompasses an in-depth analysis of key nutritional considerations for young athletes. Examining energy and macronutrient requirements, micronutrient considerations, hydration strategies, and optimal timing of nutrition, this section synthesizes existing research to provide evidence-based guidelines. Furthermore, it addresses the unique challenges posed by different sports and the importance of tailored nutritional approaches for diverse athletic endeavors. The evolving landscape of sports nutrition is also explored, with a specific focus on the benefits and potential risks associated with protein and creatine supplementation.

Summary: In summary, this article serves as a comprehensive resource for athletes, coaches, and parents seeking to navigate the intricate intersection of nutrition and young athletes. By elucidating evidence-based strategies and addressing the potential drawbacks and risks associated with certain supplements, the article aims to empower stakeholders with the knowledge needed to make informed decisions regarding the nutritional well-being of young athletes. It underscores the importance of individualized approaches, recognizing the diversity of young athletes and advocating for adaptable nutritional strategies that contribute to both immediate performance gains and sustained health and athletic success.
Habitabilidad de la vivienda urbana y COVID-19: lo estructural, lo coyuntural, lo deseable y lo posible desde una metrópoli mexicana
Authors: Pedrotti Carolina Ines , Cota Díaz Elsa Cecilia
Published: February 2024

El artículo reflexiona sobre los distintos problemas que enfrentaron los habitantes urbanos en relación con las condiciones de habitabilidad de sus viviendas durante la pandemia por covid-19. Para ello, se resalta el vínculo que han tenido los problemas de habitabilidad en el ámbito urbano con la salud desde una perspectiva histórica, y con base en una categorización de las condicio­nes de habitabilidad descritas tradicionalmente por la literatura, se formula una ponderación a la luz de las circunstancias que las han atravesado y desafiado. El caso de estudio específico es la Zona Metropolitana de Toluca. En el análisis de los resultados destacan problemáticas de habitabilidad entre las que se han visto afectadas viviendas, hogares y grupos sociales que no habían presentado hasta ahora problemas de este tipo. Finalmente, se dibuja un reposiciona­miento de las condiciones de habitabilidad (de la vivienda y urbana) y se discuten los límites de la vivienda, que obligan a volver la mirada hacia la ciudad y su uso.
Mathematical Programming-Driven Daily Berth Planning in Xiamen Port
Authors: Zhen Lu , Li Haolin , Xiao Liyang , Lin Dayu , Wang Shuaian
Published: February 2024

In this paper, we introduce the daily berth planning problem for Xiamen Hai-Tian Container Terminal (XHCT) at the Port of Xiamen, China, and propose the development and implementation of a berth planning system. The aim of the berth planning problem is to optimize daily berth plans by considering various decisions, including berth allocation, quay crane assignment, fairway traffic control, and berthing safety requirements. Among these decisions, the berthing safety requirement is a novel but practical problem in berth allocation that concerns the resource allocation related to berthing safety and interrelation with other decisions. A mathematical programming-driven methodological framework is designed with a 0-1 integer linear programming model for problem formulation and a highly efficient decomposition heuristic algorithm for solving the problem. This framework establishes the core for the berth planning system. The adoption of the berth planning system contributes to the increase of container throughput and berth capacity by transforming the planning process of XHCT. Moreover, the mathematical programming-driven daily berth planning informs further intelligent operations development in the Port of Xiamen and other container ports.

History: This paper was refereed.

Funding: This research was supported by the National Natural Science Foundation of China [Grants 72394360, 72394362, 72025103, 71831008, 72361137001, 72071173, and 72371221].
Combinatorial Optimization-Enriched Machine Learning to Solve the Dynamic Vehicle Routing Problem with Time Windows
Authors: Baty Léo , Jungel Kai , Klein Patrick S. , Parmentier Axel , Schiffer Maximilian
Published: February 2024

With the rise of e-commerce and increasing customer requirements, logistics service providers face a new complexity in their daily planning, mainly due to efficiently handling same-day deliveries. Existing multistage stochastic optimization approaches that allow solving the underlying dynamic vehicle routing problem either are computationally too expensive for an application in online settings or—in the case of reinforcement learning—struggle to perform well on high-dimensional combinatorial problems. To mitigate these drawbacks, we propose a novel machine learning pipeline that incorporates a combinatorial optimization layer. We apply this general pipeline to a dynamic vehicle routing problem with dispatching waves, which was recently promoted in the EURO Meets NeurIPS Vehicle Routing Competition at NeurIPS 2022. Our methodology ranked first in this competition, outperforming all other approaches in solving the proposed dynamic vehicle routing problem. With this work, we provide a comprehensive numerical study that further highlights the efficacy and benefits of the proposed pipeline beyond the results achieved in the competition, for example, by showcasing the robustness of the encoded policy against unseen instances and scenarios.

History: This paper has been accepted for the Transportation Science special issue on DIMACS Implementation Challenge: Vehicle Routing Problems.

Funding: This work was supported by Deutsche Forschungsgemeinschaft [Grant 449261765].
α1-adrenoceptor antagonists and 5α-reductase inhibitors for urinary tract symptoms in benign prostatic hyperplasia
Authors: Dight Jack
Published: February 2024

Benign prostatic hyperplasia is a condition that develops in the majority of men and is by some estimates is the most prevalent of all minor ailments. A healthily functioning prostate is important for the workings of the male reproductive and urinary systems. The most frequently prescribed first-line pharmacological treatments for lower urinary tract symptoms attributed to benign prostatic hyperplasia are α1-adrenoceptor antagonists and 5α-reductase inhibitors; surgery can also be carried out. Expert consensus and a strong body of evidence show these drugs are safe and effective. However, they come with a variety of side-effects so patients' priorities and iifestyles will influence pharmacological management.
Primary school teachers opinions on effective use of music in language and speech development of autistic children
Authors: Syla Mevlyde
Published: February 2024

The use of music helps with autism as in: the development of language and communication, cognitive, emotional skills. Music as a tool should be used in schools so that teachers and assistants incorporate music to improve communication skills. The purpose of this study is to obtain the views and practices of teachers and assistants on how music affects the development of language and communication in students diagnosed with autism. This research was carried out with 6 teachers and 6 assistants of autistic students of elementary schools, grades (1-5), with the aim of including music in the development of communication. The research methodology is oriented to the review of local and international literature that deals deeply with this topic and with the use of semi-structured interviews with teachers and assistants of elementary schools in Kosovo. After carrying out the research, obtained satisfactory results that argue our topic that music is a tool that develops communication in students with autism. Although teachers and assistants encounter some challenges during the teaching process, they still apply comprehensive practices, methods and new contemporary strategies by applying music as a tool that helps develop language and speech in autistic students.The recommendations in this study are addressed to relevant institutions that aim to support the work of teachers and assistants and the improvement of practices related to the development of language and communication through music in the framework of primary education.
nueva base de candelabro monumental en Tarragona.
Authors: Cuadra Rubio Rocio Manuela
Published: February 2024

Realizando un estudio sistemático y concreto de ciertas tipologías escultóricas podemos llegar a reconocer, con el tiempo, como algunos elementos un día identificados e incluidos en una categoría de objetos resulten pertenecer a otra. Este es el caso del fragmento que presentamos en el actual artículo. Con la ayuda de estudios específicos y un análisis estilístico damos nueva luz a un objeto que formaba parte de un esquema decorativo monumental poco documentado en el mundo romano.
Natura i animalitat en la ficció catalana recent
Authors: Zurrón Servera Irene
Published: February 2024

L’article examina discursos sobre la natura i els animals que recorren la ficció catalana recent, posant el focus en la novel·la Distòcia (2022), de Pilar Codony, i la pel·lícula Alcarràs (2022), de Carla Simón, dues obres que es narren des del món rural. Problematitzen la frontera entre concepcions dicotòmiques i desuniformitzen nocions com natura o animalitat, acostant-se als postulats de corrents crítics com els estudis animals, l’ecocrítica o el posthumanisme, alhora que manifesten les tensions que envolten aquestes teoritzacions. A diferència d’altres narracions que simulen les veus no humanes, com Ànima de gos (2010), d’Antònia Vicens, o Canto jo i la muntanya balla (2019), d’Irene Solà, les obres de Codony i Simón defugen l’antropomorfisme i opten per presentar els animals i els vegetals com a subjectes amb les seves singularitats.
Cartografías de la identidad
Authors: Luque Martínez Darío
Published: February 2024

Este artículo propone un primer acercamiento a dos libros de reciente publicación, Seré un anciano hermoso en un gran país (2015) y La aurora cuando surge (2022) de Manuel Astur, contextualizados en una deriva intimista y no-ideológica de la literatura contemporánea. Tomando como punto de partida la enunciación de una indignación generacional, se propone un recorrido por ambos «ensayos emocionales» a la luz de las tensiones entre el discurso confesional del autor y el paisaje asturiano de su infancia. El artículo explora, en última instancia, el problema contemporáneo de la identidad en crisis yla búsqueda de una solución poética ligada al espacio geográfico.
Immersive technologies in self-regulated learning: Systematic review of scientific literature
Authors: Luna Andrea , Ortíz Colón Ana María , Rodríguez Moreno Javier
Published: February 2024

This study presents a systematic review of scientific articles with the aim of analyzing the effect of VR/AR on self-regulated learning. For article selection, five databases were used: JSTOR, ERIC, IEEE, Scopus, and Web of Science from the last 10 years, and the PRISMA protocol was applied. The results reveal the optimal role of immersive technology in self-regulated learning processes at the level it is applied. From 2012 to 2021, the frequency of publications has increased, especially in fields of knowledge such as medicine, computer science, and education in third place. The common theme in these areas lies in the academic aspect, particularly in fields such as cognitive load, school versus home, student frustration, academic performance, motivation - self-efficacy in self-regulated learning, and procedure transfer. Based on these findings, the article proposes future research directions.
Blended learning in English for specific purposes instruction: A systematic review
Authors: Farmati Chaimae , Yeou Mohamed , Benzahaf Bouchaib
Published: February 2024

Due to Covid-19 pandemic, using ICT for teaching purposes has been the subject of a growing field of study in educational research. Thus, this systematic review aims to provide ESP practitioners with a current synthesis of the impact of blended learning on English for specific purposes (ESP) instruction. The current study systematically reviews and synthesizes studies related to blended learning and ESP with the aim of providing a comprehensive analysis of 28 research articles published across 2012-2022 and meeting selection criteria. Findings show that blended learning can foster university ESP students’ language skills. The majority of studies stress that blended learning brings considerable benefits to their ESP learning, namely flexibility, autonomy, and collaboration. The findings also revealed that few students faced some challenges such as demotivation, procrastination, and technical issues. In light of these results, the review ends up with implications for ESP teachers and researchers.
Programas de pensamiento computacional en educación primaria: una revisión sistemática
Authors: Sánchez Camacho Rafael , Grané Mariona
Published: February 2024

El pensamiento computacional (PC) describe un tipo de pensamiento analítico relacionado con la informática y la programación. La Sociedad Internacional para la Tecnología en la Educación (ISTE) y la Asociación de Profesores de Ciencias de la Computación (CSTA) han desarrollado una definición para promover la inclusión de PC en la educación en los EE. UU. El objetivo de esta revisión sistemática es describir los programas educativos que enseñan PC en educación primaria (rango de edad 6-14 años) publicados en revistas científicas indexadas, siguiendo las pautas PRISMA. La estrategia de búsqueda se llevó a cabo en cinco bases de datos: Dialnet, Psycinfo, Scopus, PyscNET y ERIC. Un total de 40 artículos cumplieron los criterios de inclusión. Los entornos de programación más utilizados fueron Scratch (55%), actividades unplugged (15%) y Code.org (10%). Los softwares encontrados trabajaban varias de las competencias de PC establecidas como básicas según la definición de la establecidas por CSTA & ISTE. Esta revisión sistemática recoge y sintetiza por primera vez los programas educativos que han demostrado ser útiles para trabajar el PC y los relaciona con los estándares de PC establecidos por CSTA, contribuyendo al conocimiento de las herramientas disponibles para utilizar en el ámbito educativo.
A view of How Education Works
Authors: Jara Ocampos Angela Monserrat
Published: February 2024

J. Dron's 'How education works: teaching, technology, and technique' is a significant contribution to the educational literature that centers on the multifaceted realm of teaching with technology. Adopting an autobiographical narrative, the author brings to the fore his rich experiences in instructional design and technology-mediated education. This work critically examines the dynamic interactions among the pedagogical methods, tools, and various actors in the educational environment. The book emphasizes the necessity for co-participation and flexibility in educational systems, while acknowledging the intricate challenges posed by learner diversity. Through the lens of a seasoned educator, it serves as a mirror for readers to reflect on their pedagogical practices, invites introspective meditation on teaching methodologies, and provides a platform for discussing common obstacles in technology-enhanced learning landscapes. This review endorses Dron's book as an essential read for educators, instructional designers, and scholars interested in the complexities and evolutions of educational technology and its impact on instructional strategies.
Definition of a self-reflection tool named Aurora for the assessment of university professors´digital competence
Authors: Bilbao-Aiastui Eider , Arruti Gómez Arantza , Carballedo Morillo Roberto
Published: February 2024

We are currently facing a historical moment in which educational practices are being transformed using technology. In this scenario, higher education institutions have a great responsibility towards the Digital Competence of University Professor (DCUP). The main objective of the study is to contribute to the improvement of the self-reflection of the DCUP. Therefore, a self-assessment tool called Aurora, based on the European Framework for the Digital Competence of Educators (DigCompEdu) model, is defined. Subsequently, the tool is applied, and the results are analysed. The methodology used is quantitative by means of an online survey. The sample consisted of 154 university professors from the University of Deusto (UD). On the one hand, through descriptive analysis it is highlighted that the Aurora questionnaire is an objective tool to measure the self-reflection of the DCUP. On the other hand, through the inferential analysis it is underlined that significant differences are found in the demographic data of professional category and age. It is also stressed that there are significant differences in the correlations. These results show that it is necessary to create a questionnaire that measures all the competences of the DigCompEdu model to be considering the DigCompEdu model.
¿Bajo qué condiciones la escuela puede contribuir a la equidad digital y a la construcción de ciudadanía activa? Resultados de una investigación-acción en una escuela española
Authors: Beneyto-Seoane Mar , Collet-Sabé Jordi
Published: February 2024

Diversos estudios señalan que, en el ámbito digital escolar, se (re)producen las mismas desigualdades que en los espacios offline. Ante esta realidad, el artículo explica los resultados de un proyecto de investigación-acción para la construcción de una ciudadanía digital activa, que busca superar estas brechas a través de una perspectiva digital democrática. El trabajo de campo se llevó a cabo en una escuela situada en una zona desfavorecida de una gran ciudad (50.000 habitantes), cerca de Barcelona (España). Los resultados se obtuvieron a través de cuestionarios, entrevistas y grupos de discusión con 236 familias, 30 docentes y 97 alumnos. Estos resultados indican que, para reducir las desigualdades, es importante: a) reconocer la diversidad de necesidades, habilidades y acceso digital de los docentes, familias y alumnos en el proceso de toma de decisiones; b) diseñar y articular diferentes espacios escolares participativos: formales e informales, físicos y virtuales; c) promover la participación de todos los agentes escolares en los ámbitos digitales y garantizar la adquisición de competencias y el acceso digital a toda la comunidad escolar. El artículo concluye que para construir una ciudadanía digital activa se requieren procesos y acciones explícitamente diseñadas para este fin y que sean metodológicamente coherentes con una perspectiva democrática e inclusiva.
inicis crítics del poblament rural altmedieval a Catalunya: el segle v a la llum de l’arqueologia
Authors: Gibert Rebull Jordi
Published: February 2024

Es presenta una anàlisi arqueològica de les transformacions que afectaren el món rural en el marc de la crisi de l’estat romà en el segle v i que donaren lloc a l’aparició del poblament altmedieval. Amb aquest fi, es descriuen, es comparen i s’interpreten tres fenòmens arqueològics concrets i els seus contextos materials: el final de les vil·les baix-imperials, les ocupacions en cova i els assentaments en alçada.
Social Network Analysis: Not Merely a Visualisation Tool? Insights from the Study of Business Networks and Groups in Biscay, 1879-1913
Authors: Etxabe Igor , Valdaliso Jesús M.
Published: February 2024

This paper introduces a scientific meta-experiment that aims to explore, by means of Social Network Analysis (SNA), a database previously worked with a traditional qualitative analysis (Valdaliso, 1988 and 1993). The sample is made up of more than 500 incorporated companies registered in Vizcaya between 1879 and 1913, which represent 30 per cent of the number and more than 90 per cent of the total capital of the companies created in that province between those dates. Although the use of SNA does not show substantially different results in the representation of the main business groups, it does provide numerous and very notable advantages, especially related to a better visualisation of the networks. However, the new methodology also poses some problems, especially when interpreting large networks. Moreover, beyond graphical and statistical techniques, qualitative information is essential for a correct understanding of the networks.
Orientando la construcción de oportunidades: una experiencia de aprendizaje servicio con estudiantes de posgrado
Authors: Álvarez Pérez Pedro Ricardo , González Benítez Nicole
Published: February 2024

Uno de los ámbitos de la intervención psicopedagógica que ha alcanzado mayor relevancia en los últimos tiempos, tiene que ver con el perfil del orientador laboral/profesional, siendo esta una de las interesantes salidas profesionales para los estudiantes que cursan el Máster en Intervención Psicopedagógica en contextos de Educación formal y no formal de la Universidad de La Laguna (ULL). En este contexto, se ha desarrollado un proyecto de aprendizaje-servicio (ApS), con la finalidad de fortalecer la conexión entre la dimensión académica y comunitaria del aprendizaje universitario. Es una manera de enseñar y de aprender por parte del alumnado a través de un servicio que se presta a la comunidad. En este caso, el proyecto ha supuesto la colaboración entre el Departamento de Didáctica e Investigación Educativa de la Universidad de La Laguna (2 docentes, 1 estudiante de doctorado y 7 estudiantes de máster) y la Fundación Don Bosco (3 orientadores laborales y 32 personas en situación de vulnerabilidad social). A través de esta colaboración, los estudiantes del Máster de Intervención Psicopedagógica, trasladaron al terreno de la práctica los conocimientos adquiridos para contribuir al desarrollo de competencias para el empleo de colectivos socialmente desfavorecidos. Los resultados obtenidos han puesto de manifiesto que la experiencia ha sido satisfactoria para todos los colectivos implicados, tanto para los estudiantes del máster, como para jóvenes de la Fundación Don Bosco, que mediante las actividades han alcanzado un mejor conocimiento de sí mismos y han desarrollado habilidades para mejorar sus capacidades de empleabilidad. La experiencia desarrollada abre una vía de colaboración importante para la atención y Orientación de colectivos en situación de vulnerabilidad social.
Quadrupole excitation of atoms with tightly focused Laguerre-Gaussian beams
Authors: Mashhadi Leila , Shayeganrad Gholamreza
Published: February 2024

This article investigates the quadrupole excitation of a trapped atom exposed to the tightly focused Laguerre-Gaussian (LG) beams with parallel and antiparallel spin angular momentum (SAM) and orbital angular momentum (OAM) under nonparaxial conditions. The Rabi frequency profile of allowed quadrupole transition channels, modified by SAM and OAM interaction, in the focal plane is provided. In the case of antiparallel SAM and OAM, the excitation probability undergoes substantial modification due to the considerable contribution of longitudinal intensity variations in tightly focused condition. The findings offer insights into controlling localized atom transition, including OAM transfer, with potential applications in qudit-based technologies.
Monocular vision-based dynamic calibration method for determining the sensitivities of low-frequency tri-axial vibration sensors
Authors: Liu Wenfeng , Cai Chenguang , Liu Zhihua , Yang Ming , Zuo Shengnan , Wang Peicheng
Published: February 2024

Low-frequency vibrations exist widely in the natural environment and in human activities. Low-frequency tri-axial vibration sensors are enormously applied in the fields of seismic monitoring, building structure health monitoring, aerospace navigating, etc. Their sensitivity calibration accuracy directly determines whether their applications can work reliably. Although the laser interferometry recommended by the International Standardization Organization (ISO) is commonly used to achieve the vibration calibration, it suffers from the shortages of low-frequency range, high cost, low efficiency, and limited applicable environment. In this study, a novel monocular vision-based dynamic calibration method is proposed, which determines the whole sensitivities of tri-axial sensors by the monocular vision method to accurately measure the spatial input excitation. This method improves the calibration performance by eliminating the installation error and enhancing calibration efficiency via decreasing reinstallations. The experimental results compared with the laser interferometry demonstrate that the investigated method can obtain similar calibration accuracy in the range of 0.16-2 Hz with more efficiency. The corresponding maximum relative deviations of X-, Y-, and Z-axial sensitivities were approximately 2.5%, 1.8%, and 0.4%. In addition, the maximum relative standard deviation of the investigated method was only about 0.3% in this range.
Watt-level all polarization-maintaining femtosecond fiber laser source at 1100  nm
Authors: Wen Junpeng , Pilger Christian , Wang Wenlong , Erapaneedi Raghu , Xiu Hao , Fan Yiheng , Hu Xu , Huser Thomas , Kiefer Friedemann , Wei Xiaoming , Yang Zhongmin
Published: February 2024

We demonstrate a compact watt-level all polarization-maintaining (PM) femtosecond fiber laser source at 1100 nm. The fiber laser source is seeded by an all PM fiber mode-locked laser employing a nonlinear amplifying loop mirror. The seed laser can generate stable pulses at a fundamental repetition rate of 40.71 MHz with a signal-to-noise rate of >100 dB and an integrated relative intensity noise of only ∼0.061%. After two-stage external amplification and pulse compression, an output power of ∼1.47 W (corresponding to a pulse energy of ∼36.1 nJ) and a pulse duration of ∼251 fs are obtained. The 1100 nm femtosecond fiber laser is then employed as the excitation light source for multicolor multi-photon fluorescence microscopy of Chinese hamster ovary (CHO) cells stably expressing red fluorescent proteins.
Antenna array-based metasurface for multi-scenario wide-angle polarization-insensitive radar cross section reduction
Authors: Meng Zan Kui , Shi Yan
Published: February 2024

In this paper a novel antenna array-based metasurface design method for wide-angle and polarization-insensitive radar cross section (RCS) reduction has been proposed, which can be applied to a variety of RCS reduction scenarios. The proposed metasurface subarray design employs a dual-element antenna array in which the two ports of each element are connected through a Wilkinson power divider, and meanwhile, two power dividers are connected through a microstrip line with a lumped resistor. The use of dual-polarized wide-beam antennas enables the metasurface array to respond to arbitrarily polarized as well as wide-angle obliquely incident electromagnetic waves. A portion of the electromagnetic waves received will be absorbed by the lumped resistor and converted into heat, while the remaining portion will be canceled in the space, achieving the low RCS characteristic. The proof-of-concept experiments have been conducted in several application scenarios for RCS reduction, including a metasurface array integrated with a microstrip antenna, a densely distributed dual-element metasurface array, and a randomly distributed dual-element metasurface array. Simulated and measured results confirm that the proposed method opens up a new avenue for more flexible and versatile RCS reduction devices and systems.
Full-angle chip scale package of mini LEDs with a V-shape packaging structure
Authors: Hu Chia Chun , Zheng Yang Jun , Liu Chun Nien , Ye Zhi Ting
Published: February 2024

The light distribution of light-emitting diodes (LEDs) generally resembles that of a Lambertian light source. When used as large-area light sources, the light distribution angle of LEDs must be modified through secondary optics design to achieve uniformity and minimize the number of light sources. However, secondary optical components pose several challenges such as demanding alignment accuracy, material aging, detachment, and lower reliability. Therefore, this paper proposes a primary optical design approach to achieve full-angle emission in LEDs without the need for lenses. The design employs a flip-chip as the light source and incorporates a V-shaped packaged structure, including a white wall layer, optical structure layers, and a V-shaped diffuse structure. With this design, the LEDs achieve full-angle emission without relying on lenses. Our experimental results demonstrated a peak intensity angle of 77.7°, a 20.3% decrease in the intensity of the central point ratio, and a full width at half maximum (FWHM) of the light distribution of 175.5°. This design is particularly suitable for thin, large-area, and flexible backlight light sources. Moreover, the absence of secondary optical components allows for a thinner light source module.
Magnetic-field-assisted optical fiber quantum temperature sensor with enhanced sensitivity
Authors: Chen Jiayao , Luo Yunhan , Luo Jiajia , Huang Huanhuan , Cheng Hongda , Liu Gui-shi , Chen Lei , Chen Zhe , Chen Yaofei
Published: February 2024

In recent years, utilizing nitrogen-vacancy color centers in diamond for temperature sensing has drawn great attention. However, increasing the sensitivity has encountered challenges due to the intrinsic temperature-dependent energy level shift, i.e., temperature responsivity, being limited to -74 kHz/K. In this Letter, we take advantage of the magnetic field to regulate the energy level to enhance temperature sensitivity. The sensor is formed by adhering a micron-sized diamond on the end face of an optical fiber, and a small magnet is mounted at a certain distance with the diamond exploiting a cured polydimethylsiloxane block as the bridge. The temperature change leads to the variation of the distance between the diamond and the magnet, thus affecting the magnetic strength felt by the diamond. This finally contributes an additional temperature-induced energy level shift, giving rise to an enhanced sensitivity. Experimental results demonstrated the proposed scheme and achieved a 4.2-fold improvement in the temperature responsivity and a 2.1-fold enhancement in sensitivity. Moreover, the diamond and the fiber-optic integrated structure improve the portability of the sensor.
Laser nanoprocessing via an enhanced longitudinal electric field of a radially polarized beam
Authors: Tsuru Yukine , Kozawa Yuichi , Uesugi Yuuki , Sato Shunichi
Published: February 2024

Single-shot laser ablation is performed on the surface of a transparent glass material using a radially polarized femtosecond beam. Theoretical and experimental investigation revealed the significant role of the material interface under high-numerical-aperture conditions. The longitudinal electric field at the focus was remarkably enhanced due to the total reflection on the interface when a radially polarized beam was focused on the back surface of the glass from the inside using an immersion lens. This focusing condition enabled the fabrication of a small ablation hole sized 67 nm. This study offers a novel, to the best of our knowledge, approach to realize laser nanoprocessing with radially polarized beams.
Barriers and facilitators to utilizing HIV prevention and treatment services among migrant youth globally: A scoping review
Authors: Li Kevin , Thaweesee Natasha , Kimmel Allison , Dorward Emily , Dam Anita
Published: February 2024

Both migrants and young people experience disproportionately high rates of HIV acquisition and poor access to HIV prevention and treatment services. To develop effective interventions and reach epidemic control, it is necessary to understand the barriers and facilitators to accessing HIV services among migrant youth. We conducted a scoping review to identify these factors for migrant youth ages 15–24, globally. We conducted a PRISMA-concordant scoping review using keyword searches in PUBMED and Web of Science for peer-reviewed primary literature published between January 2012 and October 2022. We included studies that investigated barriers and facilitators to accessing services for migrant youth participants. We used the Socio-Ecological Model as an analytical framework. The 20 studies meeting the inclusion criteria spanned 10 countries, of which 80% (n = 16) were low- and middle-income countries. Study methods included were quantitative (40%), qualitative (55%), and mixed methods (5%). Six studies included refugee youth (30%), 6 included migrant worker youth (30%), 3 included immigrant youth (15%), 2 included rural migrant youth (10%), and 1 included immigrants and refugees. The remainder represented unspecified migrant youth populations (10%). At the individual level, education level and fear of infection acted as barriers and facilitators to HIV services. At the relationship level, social support and power in relationships acted as barriers and facilitators to HIV services. At the community level, barriers to HIV services included discrimination and stigma, while community and religious outreach efforts facilitated access to HIV services. At the structural level, barriers to HIV services included stigmatizing social norms, lack of health insurance, and legal barriers. Migrant youth face significant, unique barriers to accessing HIV services. However, facilitators exist that can be leveraged to enable access. Future implementation science research, enabling policies, and adapted programmatic interventions should prioritize migrant youth as a distinctive sub-population to receive targeted HIV services.