bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improving the surface quality of AlMgSi1 alloy with the selection of the appropriate vibration grinding stones
Authors: Engler Carsten , Georgiadis Anthimos , Lange Dirk , Meier Nicolas 
Published: February 2024

AbstractThe number and variety of paints and coating systems in the automotive industry have increased in recent years. However, the basic requirement for the quality of the paints still depends on the surfaces on which they are applied. This applies not only to the large body parts but also to all components that are integrated.There are many surface treatment processes and techniques that are used as an additional process step, such as pickling for a chemical surface treatment or blasting for a mechanical surface treatment.The present work investigates a method for optimizing the surface before painting, using the membrane cup of the ultrasonic sensor as an example for AlMgSi1 alloy, without implementing additional process steps.First, all process steps influencing the surface quality for the production of a membrane cup were considered for optimization. Then, based on a backward process chain analysis, vibratory grinding for deburring of the membrane cup was determined as the process step to be optimized. For the optimization of the vibratory grinding, experiments with two different grindstones were performed. For the characterization of the surface quality, the roughness parameters Rz and Ra were measured with a confocal laser scanning microscope and analyzed in order to determine the optimal process conditions.The experiments showed that the surface roughness can be significantly improved using dedicated process parameters and taking into account the geometry of the vibratory grinding stones. Moreover, different surface qualities can be achieved at different areas on the workpiece, this new approach provides a solution for surface optimization in various areas of the workpiece without additional process steps and costs.
Η επίδραση των βίαιων ηλεκτρονικών παιχνιδιών στα επίπεδα της κατάθλιψης, του θυμού και της επιθετικότητας στην ύστερη εφηβεία
Authors: Κακούρης Βασίλειος , Κάμτσιος Σπυρίδων 
Published: February 2024

Η παρούσα μελέτη εξέτασε, με τη χρήση ημι-πειραματικού σχεδιασμού, την επίδραση των βίαιων ηλεκτρονικών παιχνιδιών στην κατάθλιψη, τον θυμό και την επιθετικότητα στην ύστερη εφηβεία. Το δείγμα αποτέλεσαν 100 έφηβοι, που συμμετείχαν στην πειραματική ομάδα ή στην ομάδα ελέγχου, με κριτήριο την προγενέστερη ενασχόληση με το βίαιο ηλεκτρονικό παιχνίδι PUBG MOBILE. Πραγματοποιήθηκαν μετρήσεις σε δύο φάσεις (πριν και μετά την ενασχόληση με τα παιχνίδια) με τη χρήση των παρακάτω ερευνητικών εργαλείων: (α) ένα ερωτηματολόγιο δημογραφικών στοιχείων, (β) η Κλίμακα Κατάθλιψης του Beck-II (Beck et al., 1996), (γ) η Κλίμακα του Θυμού ως Κατάστασης (Spielberger, 1988) και (δ) το Ερωτηματολόγιο Επιθετικότητας-Σύντομη Μορφή (Bryant & Smith, 2001˙ Buss & Perry, 1992). Η πειραματική ομάδα ασχολήθηκε 15 λεπτά με το προαναφερθέν παιχνίδι στο κινητό τηλέφωνο, ενώ ταυτόχρονα η ομάδα ελέγχου ασχολήθηκε με το μη βίαιο παιχνίδι FIFA Football. Από τα αποτελέσματα της μελέτης αναδείχθηκε η στατιστικά σημαντική αύξηση του θυμού, της λεκτικής και σωματικής επιθετικότητας στην πειραματική ομάδα, αμέσως μετά την ενασχόληση με το βίαιο ηλεκτρονικό παιχνίδι, ενώ δεν παρατηρήθηκε στατιστικά σημαντική διαφορά, μεταξύ πρώτης και δεύτερης μέτρησης, στις προαναφερθείσες μεταβλητές στην ομάδα ελέγχου. Τα επίπεδα της κατάθλιψης παρέμειναν σταθερά και στις δύο ομάδες πριν και μετά την ενασχόληση με τα παιχνίδια. Επιπλέον, διαπιστώθηκε ότι οι ώρες ενασχόλησης με τα ηλεκτρονικά παιχνίδια, η σπουδαιότητα που αποδίδουν οι συμμετέχοντες σε αυτήν την ενασχόληση και η κατάθλιψη αποτελούν προβλεπτικούς παράγοντες της εξάρτησης από τα ηλεκτρονικά παιχνίδια. Τα αποτελέσματα καταδεικνύουν ότι η ενασχόληση με τα βίαια ηλεκτρονικά παιχνίδια αυξάνει τον θυμό και την επιθετικότητα των παικτών βραχυπρόθεσμα και πιο συγκεκριμένα τη σωματική και τη λεκτική επιθετικότητα αλλά όχι την έμμεση. Τα ευρήματα συζητούνται στο πλαίσιο της σύγχρονης βιβλιογραφίας.
An Approximate Dynamic Programming Approach to Dynamic Stochastic Matching
Authors: You Fan , Vossen Thomas 
Published: February 2024

Dynamic stochastic matching problems arise in a variety of recent applications, ranging from ridesharing and online video games to kidney exchange. Such problems are naturally formulated as Markov decision processes (MDPs) that are, however, intractable in general. To improve tractability, we investigate the linear programming-based approach to approximate dynamic programming. This approach can provide both feasible control policies and bounds on the MDPs’ optimal policy value, which can be used to establish optimality gaps. However, the approximate linear programs (ALPs) resulting from this approach can often be difficult to solve. To address this computational challenge, we derive novel ALP reformulations that can be used for a broad class of dynamic stochastic matching problems that incorporate, among others, possible match failures and certain restrictions on feasible matchings. We show that these ALP reformulations can be solved efficiently and applied to a broad class of dynamic matching problems. In addition, our numerical results indicate that our ALP reformulations can produce tight bounds that allow us to establish near-optimal policy performance for a broad set of problem instances. Thus, ALP reformulations can present an attractive alternative for applications that involve dynamic stochastic matching. History: Accepted by Nicola Secomandi, Area Editor for Stochastic Models & Reinforcement Learning. Supplemental Material: The software that supports the findings of this study is available within the paper and its Supplemental Information ( https://pubsonline.informs.org/doi/suppl/10.1287/ijoc.2021.0203 ) as well as from the IJOC GitHub software repository ( https://github.com/INFORMSJoC/2021.0203 ). The complete IJOC Software and Data Repository is available at https://informsjoc.github.io/ .
Applicability of DNA barcoding-based analyses on the diet of the gray brocket deer (Subulo gouazoubira) in xeric hillside forests
Authors: Cosse Mariana , Bruno Antonella , Mannise Natalia , Bou Nadia , Zabaleta Maria , Bonifacino Mauricio , Camargo Arley , Smircich Pablo , Iriarte Andrés , Brazeiro Alejandro 
Published: February 2024

In this study, we explore the applicability of DNA barcoding, specifically targeting the chloroplast DNA (cpDNA) sequences, particularly the trnL (UAA) intron region, to analyze the diet of gray brocket deer. This approach offers improved taxonomic resolution and the ability to identify species with greater precision compared to traditional methods. The study was conducted in the "Reserva Natural Salus" in Uruguay, covering a range of vegetation types, where gray brocket deer coexist with other exotic ungulates. A local reference database of trnL (UAA) sequences was established, incorporating both GenBank data and sequences obtained from native species in the study area. Fecal samples were collected in summer and winter, and DNA was extracted and amplified for metabarcoding analysis in pooled samples for each season. For each sample 28,229 and 33,588 reads were obtained respectively, which together corresponded to 25 Operational Taxonomic Units (OTUs). The species Rubus ulmifolius and Schinus engleri were the most represented in the diet with 69.6 % of the summer reads, whereas in winter, 68.7 % of the reads corresponded only to Schinus engleri. These findings indicate that gray brocket deer consume species that have higher nutritional value, which may be linked to their capacity to thrive in young and productive ecosystems. This study demonstrates the feasibility of DNA barcoding for dietary analysis in gray brocket deer and provides valuable insights into their food habits in the "Reserva Natural Salus". Further improvements to increase the reference databases of native species and the exploration of additional genetic markers are recommended for enhanced species-level discrimination in dietary analysis studies. This methodology is promising for future research as diet studies have an impact on species management, habitat conservation and biodiversity conservation efforts.
Biogeographic analysis of population density of white-tailed deer in Mexico: Importance of the Protected Natural Areas and Wildlife Management Units
Authors: Sandoval-Comte Adriana , Mandujano Salvador , González-Zamora Arturo , Rodríguez Pilar 
Published: February 2024

The white-tailed deer Odocoileus virginianus is the wildlife species with the greatest geographic distribution and economic importance in Mexico. This article presents a biogeographic analysis of the population density of this deer species by federal states, vegetation types, biogeographic provinces, and field methods, based on 200 selected studies. Estimates are highly variable and potentially biased due to the different field designs and statistical analyses. The national average density was estimated at 6.9 deer/km2 (SD = 5.1); specifically, 75.5 % of the estimates were less than 10 deer/km2, and only 5.5 % were greater than 15 deer/km2. The highest densities were obtained in the northern region by applying the strip transect counts; while estimations using the fecal group count method were more variable and were the most used method in temperate and tropical dry forest regions. The states with the highest densities were Coahuila, Tamaulipas, Jalisco, Morelos, Michoacán, and Durango. The highest densities were estimated in the xerophilous scrublands of the northeast, intermediate for temperate, tropical dry, and sub-deciduous forests; and the lowest in the tropical wet forest. The highest densities were reported for the Tamaulipeca province followed by the Altiplano Chihuahuense, Sierra Madre Occidental, Costa Pacífica, and Depresión del Balsas. The results of this analysis could guide management strategies for the conservation and sustainable use of this species in extensive UMAs and ANPs, and also to test ecological hypotheses. However, applying more rigorous field design and statistical analysis is important to obtain confident estimates of population density and other demographic parameters to monitor population dynamics.
DIDÁTICA, RESSIGNIFICADO DA AULA E A FORMAÇÃO PEDAGÓGICA DO PROFESSOR
Authors: Masetto Marcos Tarciso 
Published: February 2024

A Didática apresenta possibilidades metodológicas e estratégias de ação docente para orientar o fazer pedagógico e, nesse sentido, é tema essencial nos processos de formação de professores. Na prática, o que se observa é que a Didática tem sido depreciada, desvinculada das tendências pedagógicas, retrocedendo em muitas conquistas. O objetivo desse artigo é refletir sobre uma nova perspectiva de Didática focada no desenvolvimento educacional e profissional das pessoas através de um processo de aprendizagem que acontece na Aula, redefinida como tempo e espaço de aprender. Trata-se de um ensaio teórico baseado em alguns autores entre eles, Mizukami, Pozo, Sacristán e Gomez, Bain e Autor 1, assim como nas vivências pedagógicas do autor. Ao final se relaciona essa perspectiva de Didática com a formação de professores ressaltando a necessidade de mudança de atitudes de professor e alunos para um processo de aprendizagem.
Design and simulation of an extreme ultraviolet metalens based on the Pancharatnam–Berry phase
Authors: Mao Xu , Yu Gang , Zhao Yongmei , Wei Bo , Li Zhaofeng , Yang Fuhua , Wang Xiaodong 
Published: February 2024

Extreme ultraviolet (EUV) radiation plays a key role in the fields of material science, attosecond metrology, and lithography. However, the reflective optical components typically used in EUV systems contribute to their bulky size, weight, and increased costs for fabrication. In this paper, we theoretically investigate transmissive metalens designs capable of focusing the EUV light based on the Pancharatnam–Berry phase. The designed metalens is composed of nanoscale elliptical holes, which can guide and manipulate EUV light due to the higher refractive index of the vacuum holes compared to that of the surrounding material. We designed an EUV metalens with a diameter of 10 µm, which supports a focal length of 24 µm and a numerical aperture of up to 0.2. It can focus 55-nm EUV incident light to a diffraction-limited spot, and the focusing efficiency is calculated to be as high as about 7% over a broad EUV frequency range (50–65 nm). This study reveals the possibility of applying a dielectric metalens in the EUV region without a transmissive optical material.
Spatial pattern and associated factors of timely vaccination in Ethiopia using EDHS-2016 data: A multilevel and spatial analysis
Authors: Agimas Muluken Chanie , Asmamaw Meron , Mekonen Nebiyu , Mamo Fantu , Shewaye Daniel Alayu 
Published: February 2024

Background
Age-appropriate vaccination or vaccine timeliness is the administering of vaccines on the specified schedule of immunization. One of the qualities of the immunization program is an age-appropriate vaccine, it has become an ignored indicator of program performance. Even though age-appropriate vaccination is critical for child health, there are no national-level studies to generate conclusive and tangible evidence about the determination of timely vaccination in Ethiopia.

Objective
To assess the spatial pattern and associated factors of timely vaccination in Ethiopia using EDHS-2016 data: A multilevel and spatial analysis.

Method
Community based cross-sectional study design was employed from 18 January to 27 June 2016. To select the participants, two-stage cluster sampling was employedin the Ethiopian Demographic Health Survey 2016 data. Permission was obtained via online request by explaining the aim of this particular study from DHS international. A statistical package for social science-21 software was used for data cleaning, recoding, and analysis. Arc GIS 10.3 software was used to show the spatial variation of age-appropriate vaccination practices. A generalized linear mixed-effect model was used. For all models, intra-class correlation, a proportional change in variance, the log-likelihood test, and the Akaike information criterion were calculated. The best model was selected by the lowest value Akaike information criterion. Variables with a p-value less than 0.05 and a 95% confidence level were considered for the statistically significant association.

Result
The spatial distribution of age-appropriate vaccination practice in Ethiopia was non-randomly distributed with the global Moran’s I value of 0.22 (p-value <0.001). The prevalence of age-appropriate vaccination practice in Ethiopia was 33.8%. Women who receive ≥ 2 TT vaccines (AOR = 1.48; 1.22, 1.79), women who lived in rural residences (AOR = 0.77; 0.62, 0.96), gave birth at a health facility (AOR = 1.2; 1.12, 1.37), ANC follow up (AOR = 174; 1.45, 2.1), richest (AOR = 1.65; 1.15, 2.37), richer (AOR = 1.72; 1.3, 2.22), middle-level income (AOR = 1.65; 1.16, 2.36), poorer (AOR = 1.47; 1.11, 1.96) were the factors of age-appropriate vaccination practice.

Conclusion
The spatial distribution of age-appropriate vaccination practice in Ethiopia was non-randomly distributed across the regions. Age-appropriate vaccination practice was low in Ethiopia. Wealth index, usual caretaker of the child, ANC utilization, history of TT vaccination, place of delivery, and residence were associated with age-appropriate vaccination practice.
Primary Hepatic EBV-DLBCL Lymphoma in the Setting of COVID-19 Infection
Authors: De Souza Luisa Maria , Ismail Mohamed , Elaskandrany Menna-Allah , Fratella-Calabrese Anthony , Grossman I. Robert 
Published: February 2024

ABSTRACT
This case study describes an instance of primary hepatic diffuse large B cell lymphoma (DLBCL) in a patient who had prolonged coronavirus disease 2019 (COVID-19). DLBCL rarely presents as a primary hepatic mass. The 53-year-old man sought emergency care because of fatigue and weight loss. Diagnostic tests showed mildly elevated liver enzymes and imaging pointed to several low-density liver lesions. A liver biopsy paired with immunohistochemical testing verified the DLBCL diagnosis. Notably, the patient had COVID-19 4 months before the liver-related symptoms. The link between COVID-19 and the emergence of solid tumor cancers is unclear, but this case underscores its potential significance and the need for further research. This report stresses the importance of recognizing and documenting instances where COVID-19 might influence the onset of solid tumor cancers, including primary hepatic DLBCL.
Gleiche Teilhabe oder dauerhafte Nachteile? Die Chancen von Ostdeutschen auf Führungspositionen
Authors: Hartmann Jörg 
Published: February 2024

Zusammenfassung
Zahlreiche Studien weisen auf die Unterrepräsentanz von Ostdeutschen in Führungspositionen hin. Bislang liegen jedoch kaum Studien zur zeitlichen Entwicklung und keine Studien zu den Ursachen dieser Unterrepräsentanz vor. Der Beitrag geht daher der Frage nach, ob sich die Chancen von Ostdeutschen auf Führungspositionen über die Zeit oder Geburtskohorten hinweg denen von Westdeutschen angleichen und auf welche Ursachen sich die Ungleichheiten zurückführen lassen. Die Ergebnisse auf Basis des Sozio-oekonomischen Panels mit Daten von 1990 bis 2020 zeigen eine Überrepräsentanz ostdeutscher Frauen, welche über die Zeit und die Kohorten abnehmen, während die Nachteile ostdeutscher Männer sich über die Zeit nicht verändern, aber über die Kohorten abnehmen. Kompositionelle Unterschiede im Humankapital, in der Wirtschaftsstruktur oder in der sozialen Herkunft spielen für die Nachteile ostdeutscher Männer keine Rolle. Dagegen zeigen Analysen für höhere Führungspositionen, dass vor allem in Ostdeutschland in allen Kohorten Nachteile für ostdeutsche Frauen und Männer bestehen. Insgesamt deuten die Ergebnisse auf den Elitentransfer Anfang der 1990er Jahre als Ursache der Benachteiligung ostdeutscher Männer beim Zugang zu Führungspositionen.
Public vs. Private
Authors: Berumen Britteny , Boatman Misty , Bland Mark W. 
Published: February 2024

Evolutionary theory is fundamental to biology, yet evolution instruction in high schools has often been unsatisfactory. How or whether high school biology teachers teach evolution is influenced by their own acceptance or rejection of evolutionary theory, parents’ and community members’ views, and in the case of some private schools, their religious affiliations. Studies documenting how evolution is taught in public high schools have been conducted, yet private schools remain underresearched.
Arkansas high school biology teachers employed by public and private schools were invited to complete a survey composed of the Measure of Acceptance of the Theory of Evolution (MATE) and other items designed to allow comparison of their treatment of topics within evolutionary theory. Specifically, we sought to compare public and private teachers’ acceptance of evolution, how they teach it in their classrooms, and how their acceptance of the validity of evolution compares with four other widely accepted scientific theories (cell, gene, germ, and atomic). Results suggest that public school teachers have higher levels of acceptance of evolution than private school teachers. However, teachers in both public and private schools reported lower acceptance of the validity of evolutionary theory compared with the other four scientific theories. Across topics within evolution, natural selection was given the most treatment while human evolution was given the least.
ОСОБЛИВОСТІ УДОСКОНАЛЕННЯ ПРОФЕСІЙНО-ОРІЄНТОВАНОЇ ПСИХОФІЗИЧНОЇ ПІДГОТОВКИ СЛІДЧИХ НАЦІОНАЛЬНОЇ ПОЛІЦІЇ
Authors: Великий Юрій 
Published: February 2024

Мета. Здійснити аналіз професіограми професії слідчого НП, визначити ієрархію професійно значущих психофізіологічних якостей, необхідних для успішної професійної діяльності. Методи. Аналіз, узагальнення, систематизація даних наукових досліджень та літературних джерел. Результати. У роботі слідчих переважає тривала розумова діяльність, яка є виснажливою для організму, веде до стомлення і перевтоми, переважає монотонія, тривала безперервна робота з документами; перебування в стані емоційної та фізичної напруженості [9, 10]. Одним із ефективних шляхів удосконалення процесу підготовки слідчих є професійно-орієнтована психофізична підготовка курсантів ЗВО до майбутньої професійної діяльності. Висновок. Успішне оволодіння професією слідчого та ефективність подальшої діяльності буде залежати від ступеня сформованості: розумової працездатності; оперативної та довгострокової пам’яті; уваги; розвитку спеціальних професійних здібностей; емоційної стійкості; точності і чутливості аналізаторів (зорового, слухового, дотикового); швидкості просторової реакції на подразники; реакцій вибору та небезпеку; статичної, загальної, силової витривалості; спритності; координаційних здібностей; гнучкості.
ВПЛИВ САМОСТІЙНИХ ЗАНЯТЬ ФІЗИЧНОЮ КУЛЬТУРОЮ НА ФІЗИЧНУ ПІДГОТОВЛЕНІСТЬ СТАРШИХ ШКОЛЯРІВ
Authors: Файчак Роман , Бублик Сергій , Човган Ростислав , Крижанівська Оксана 
Published: February 2024

Мета. Вивчення проблеми самостійних занять фізичними вправами, як засобу підвищення фізичної підготовленості ліцеїстів старших класів. Методи дослідження. Мотивацію до самостійних спортивно-оздоровчих занять виявляли анкетуванням. 100 ліцеїстів розділили на КГ-50 чол. та ЕГ- 50 чол. (середній вік 17,0±1,2 років). Констатуючий експеримент полягав у виявленні мотивації до самостійних занять, визначали рівень теоретичних знань та фізичної підготовленості Формуючий експеримент полягав у проведенні в ЕГ методичної роботи, спрямованої на підвищення рівня теоретичних знань для проведення самостійних занять фізичними вправами, та їх фізичної підготовленості Контрольний експеримент полягав у повторному визначенні рівня фізичної підготовленості учнів ЕГ. Результати. Констатуючий експеримент показав низький рівень теоретичної підготовки ліцеїстів, що визначає їх низьку мотивацію до самостійних занять. Після експерименту 66% учнів ЕГ показали високий рівень мотивації, що тісно корелює (r=0,89;p=0,0012) із збільшенням до 49,8% кількості ліцеїстів з вище середнього рівнем фізичної підготовленості. Висновки. 1. Після експерименту більшість ліцеїстів мають стійку мотивацію до самостійних занять.
The effect of moisture content on the mechanical properties of wood structure
Authors: Kherais Mohammad , Csébfalvi Anikó , Len Adél , Fülöp Attila , Pál-Schreiner Judit 
Published: February 2024

AbstractIn the last two decades, the utilization of timber in construction has gained increasing attention among researchers and sustainable building designers. Therefore, studies of climate impact on timber structures have been conducted, many of them focusing on the moisture content caused changes in timber. In the present study, four-point bending tests have been performed on three testing groups, containing 30 samples each. The first group has been tested under its natural conditions, while the second and the third groups were fully saturated with water. The third group was glazed with a protection material. The results show the changes in the modulus of elasticity and the modulus of rupture caused by the moisture content increase. In the same time the material behavior changed from brittle to semi-ductile or ductile for some samples.