bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Addition Theorem for two-step nilpotent torsion groups
Authors: Shlossberg Menachem 
Published: January 2023

Abstract
The Addition Theorem for the algebraic entropy of group endomorphisms of torsion abelian groups was proved in [D. Dikranjan, B. Goldsmith, L. Salce and P. Zanardo, Algebraic entropy for abelian groups, Trans. Amer. Math. Soc.
361 (2009), 7, 3401–3434].
Later, this result was extended to all abelian groups [D. Dikranjan and A. Giordano Bruno, Entropy on abelian groups, Adv. Math.
298 (2016), 612–653] and, recently, to all torsion finitely quasihamiltonian groups [A. Giordano Bruno and F. Salizzoni, Additivity of the algebraic entropy for locally finite groups with permutable finite subgroups, J. Group Theory
23 (2020), 5, 831–846].
In contrast, when it comes to metabelian groups, the additivity of the algebraic entropy fails [A. Giordano Bruno and P. Spiga, Some properties of the growth and of the algebraic entropy of group endomorphisms, J. Group Theory
20 (2017), 4, 763–774].
Continuing the research within the class of locally finite groups, we prove that the Addition Theorem holds for two-step nilpotent torsion groups.
Finite groups with an affine map of large order
Authors: Bors Alexander 
Published: January 2023

AbstractLet 𝐺 be a group. A functionG→GG\to Gof the formx↦xα⁢gx\mapsto x^{\alpha}gfor a fixed automorphism 𝛼 of 𝐺 and a fixedg∈Gg\in Gis called anaffine map of 𝐺. The affine maps of 𝐺 form a group, called the holomorph of 𝐺. In this paper, we study finite groups 𝐺 with an affine map of large order. More precisely, we show that if 𝐺 admits an affine map of order larger than12⁢|G|\frac{1}{2}\lvert G\rvert, then 𝐺 is solvable of derived length at most 3. We also show that, more generally, for eachρ∈(0,1]\rho\in(0,1], if 𝐺 admits an affine map of order at leastρ⁢|G|\rho\lvert G\rvert, then the largest solvable normal subgroup of 𝐺 has derived length at most4⁢⌊log2⁡(ρ−1)⌋+34\lfloor\log_{2}(\rho^{-1})\rfloor+3.
Natural convection of a viscoelastic Cattaneo–Christov fluid bounded by thick walls with finite thermal conductivity
Authors: Dávalos-Orozco Luis Antonio , Ruiz Díaz Jose Antonio 
Published: January 2023

Abstract
The linear natural convection of a Maxwell viscoelastic fluid with Cattaneo–Christov heat flux constitutive equation, between two thick walls with finite thermal conductivity is investigated. The viscoelastic fluid and the heat flux have different relaxation times. The main interest is on the curves of criticality for different thicknesses ratio D and thermal conductivities ratio X. In the middle range of log X the curves of criticality stabilize depending on the other parameters of the problem. It is revealed that for some Prandtl numbers the curves of criticality remain higher for small X and lower for large X. However, increasing the Prandtl number this behavior is reversed. It is shown that this has important consequences in the order of the criticality curves when the heat flux relaxation time is increased. Depending on the Prandtl number, an increase of this relaxation time may decrease (destabilize) the curves of criticality until a minimum is reached, after which the curves start to increase (stabilize) again. For two different magnitudes of the viscoelastic relaxation time, the critical Rayleigh number, wavenumber and frequency of oscillation are plotted against log X for different magnitudes of D and the heat flux relaxation time.
Spatial resolution of airborne gravity estimates in Kalman filtering
Authors: Jensen Tim Enzlberger 
Published: January 2023

Abstract
Airborne gravimetry is an efficient and reliable method to obtain information on the gravity field, fundamental to gravity field modelling, geoid determination, and flood risk mapping. In evaluation and utilization of gravity estimates, two measures are of fundamental importance, namely the accuracy and spatial resolution. These measures are related to one another through the filtering required to suppress observational noise. As strapdown inertial measurement units (IMUs) are increasingly deployed for airborne gravity surveys, the Kalman filter estimation method is routinely used for gravity determination. Since filtering is not applied directly to the observations in Kalman filtering, it is not straightforward to associate the derived gravity estimates with a measure of spatial resolution. This investigation presents a method for deriving spatial resolution by evaluating the transfer function formed after applying a delta function to the observed accelerations. The method is applied to Kalman-filter-derived gravity estimates from an airborne strapdown IMU system, yielding a full-wavelength spatial resolution of 5.5 km at an accuracy of 0.6 mGal. These results are consistent with a comparison with upward continued terrestrial gravity observations.
Methodology for nonparametric bias reduction in kernel regression estimation
Authors: Slaoui Yousri 
Published: January 2023

Abstract
In this paper, we propose and investigate two new kernel regression estimators based on a bias reduction transformation technique. We study the properties of these estimators and compare them with Nadaraya–Watson’s regression estimator and Slaoui’s (2016) regression estimator. It turns out that, with an adequate choice of the parameters of the two proposed estimators, the rate of convergence of two estimators will be faster than the two classical estimators, and the asymptotic MISE (mean integrated squared error) will be smaller than the two classical estimators. We corroborate these theoretical results through simulations and a real Malaria dataset.
Fabrication of quantum dot and ring arrays by direct laser interference patterning for nanophotonics
Authors: Wang Yun-Ran , Han Im Sik , Hopkinson Mark 
Published: January 2023

Abstract
Epitaxially grown semiconductor quantum dots (QDs) and quantum rings (QRs) have been demonstrated to be excellent sources of single photons and entangled photon pairs enabling applications within quantum photonics. The emerging field of QD-based nanophotonics requires the deterministic integration of single or multiple QD structures into photonic architectures. However, the natural inhomogeneity and spatial randomness of self-assembled QDs limit their potential, and the reliable formation of homogeneous and ordered QDs during epitaxy still presents a challenge. Here, we demonstrate the fabrication of regular arrays of single III–V QDs and QRs using molecular beam epitaxy assisted by in situ direct laser interference patterning. Both droplet epitaxy (DE) GaAs/AlGaAs QDs and QRs and Stranski–Krastanov (SK) InAs/GaAs QDs are presented. The resulting QD structures exhibit high uniformity and good optical quality, in which a record-narrow photoluminescence linewidth of ∼17 meV from patterned GaAs QD arrays is achieved. Such QD and QR arrays fabricated through this novel optical technique constitute a next-generation platform for functional nanophotonic devices and act as useful building blocks for the future quantum revolution.
Research on optimization of crane fault predictive control system based on data mining
Authors: Yanbin Xu , Jianhua Zhang , Wang Xiongwei , Shabaz Mohammad , Ahmad Mohd Wazih , Ray Samrat 
Published: January 2023

Abstract
To ensure the safe functioning of lifting equipment, a data mining-based optimization study of a crane failure predictive control system is provided. To diagnose lifting machinery faults, the system employs decision tree categorization. Using association rules, a correlation study of hoisting machinery defect and failure was performed. When the minimal confidence and support degree are entered, a total of 244 instances of 18 frequent itemset A9 (safety protection device) may be obtained, indicating that lifting machinery does not perform well in this category. A6 (main parts) and A9 appeared a total of 98 times, with support and confidence of 29.4 and 35.6, respectively, indicating that the main parts can detect that the safety protection device is also having problems. A7 (electrical control system) and A9 appeared a total of 67 times, with support and confidence of 20.1 and 27.3, respectively, indicating that the electrical control system can detect that the safety protection device is also having problems; the correlation between them was also quite large. The system’s feasibility and efficacy shows that it has some application value.
The Time of the Last Hunters: Chronocultural Aspects of Early Holocene Societies in the Western Mediterranean
Authors: Perrin Thomas 
Published: January 2023

Abstract
In the Western Mediterranean Basin, the last hunter-gatherer societies fall within a chronological range between the 9th and 5th millennia cal. BCE, that is, between the cold oscillation of the Younger Dryas and the Holocene climatic optimum, before disappearing under the expansion of the first Neolithic societies. The variability in cultural expressions is very high, as shown by the variability in the lithic industries, a technical field which, from a historiographical point of view, is the preferred approach of archaeologists to address these issues. However, convergences in technical choices or typological features show the existence of major currents of diffusion and exchange between many of these Mesolithic groups. But the discussion of these cultural dynamics requires knowing precisely the absolute chronology of these groups and the detailed characteristics of their material productions. The aim of this article is so to re-examine the chronocultural organization of the Mesolithic of the Western Mediterranean, especially the first part of it, roughly from the middle of the 10th millennium cal. BCE to the middle of the 6th, on the basis of a critical revision of the absolute dates.
„A derék asszony dicsérete"
Authors: Hack Márta 
Published: January 2023

As part of the Old Testament and ancient Hebrew wisdom literature, the Proverbs of Solomon describes an ideal for women. In the Old Testament, the image of women is not pejorative, even though from the Fall of mankind, a woman is under the authority of a man. The status of girls and married women in a patriarchal family had somewhat changed for the better under the Law of Moses; although divorce and polygamy were legal, monogamous marriage received indirect protection. The Law also protected women and widows in cases of defamation and, in matters of inheritance as well. This study closes with the analysis of the poetic work of Proverbs 31:10-31, describing an outstanding woman, who is a faithful wife, wise teacher of her children, diligent housekeeper and a talented businesswoman. Her noble character serves as an example and shapes the ideals of women through the ages.
Az autizmus spektrum zavar és a szerhasználat-zavar kettős diagnózisa
Authors: McNeill Brigitta 
Published: January 2023

Az autizmus és a szerhasználat-zavar metszéspontján létezni talán az egyik legnehezebb állapot. Felnőtt, fiatal felnőtt autistaként legtöbbször azt tapasztalják, hogy hibásak, minden mozdulatukkal, megnyilvánulásukkal megsértik az adott társadalmat és annak szabályrendszerét. Azonban a drogokkal, kábítószerekkel, ha csak egy időre is, képesek kontrollálni személyiségük azon részét, amely nem illeszthető be a környezetükbe. Belevághatnak egy olyan életbe, ahol ez lesz az új, speciális érdeklődési körük, ami körül majd az életük forog. Amikor eljön az a pont, hogy a neurotipikus többséghez hasonlóan érzékelik, hogy függők lettek, ugyanaz a szégyen, amit addig is éreztek autista vonásaik, viselkedésük miatt egész életükben, ismét előtérbe kerül, csak intenzívebben. Célom feltárni ezt a speciális helyzetet, amelynek megoldása a jelenlegi ellátórendszerünkben bonyolult és költséges lenne, azonban a megfelelő módszertan és gyakorlatok átvételével a releváns kutatásokban élenjáró országokból, reális célkitűzés lehet a hazai szociális munka számára is.
A cikk beérkezett: 2022. 12. 15-én, javítva: 2022. 12. 19-én, elfogadva: 2022. 12. 20-án.
"Hacer hablar a los muertos”: sobre los usos del archivo y el trabajo arqueológico en El material humano
Authors: Monroy Álvarez Roberto Carlos 
Published: January 2023

La propuesta del artículo es pensar determinadas fuerzas políticas condensadas en la figura del archivo, tanto en su instrumentalización por la Policía Nacional de Guatemala, como en su trabajo de rescate histórico y en su representación en el material humano de Rodrigo Rey Rosa. Desde una crítica derridiana, entendemos al archivo como el lugar que designa el encuentro de una pulsión de conservación y una pulsión de destrucción; esto es, el encuentro entre fuerzas que tratan de olvidar y las que tratan de construir una memoria. El archivo entonces se muestra como una figura subversiva por su capacidad para desestabilizar cualquier mandato. Además, su desplazamiento a espacios del arte y la literatura significa también una producción de sentido específica, donde el archivo es a veces crítico, a veces pacificador. Desde dicha posición, se tratará de analizar tanto el uso represor del archivo como la representación hecha por Rey Rosa, pensando su escritura como una práctica social y como un trabajo arqueológico preocupado por el rescate de una verdad forense y en relación con una justicia espectral. El propósito final es hacer una revisión crítica de los usos de la figura del archivo y sus formas en las políticas de olvido, memoria y justicia.
La intelectualidad costarricense, su misión y sus desdoblamientos. El caso de la novela Elvira (1940) y el filme epónimo (1955)
Authors: Salas Murillo Bértold 
Published: January 2023

La novela Elvira (1940), de Moisés Vincenzi, y su adaptación cinematográfica (1955), producida por Carlos Alfaro McAdam, ofrecen, a través del protagonista de ambos relatos, Alberto Manara Bassi, un símbolo del intelectual costarricense de mediados del siglo XX. Estas representaciones, una anterior y otra posterior al establecimiento de la Segunda República en 1949, incluyen posiciones respecto a la patria, la etnia, las clases sociales y el género que pueden ser vinculadas al momento histórico de su producción. Por otra parte, el juego especular por el que coinciden las ideas y escritos del sujeto literario Manara Bassi (quien toma el nombre de Mariano González) y el autor Vincenzi, conocido principalmente por su obra filosófica, convierten la novela y el filme en una vía para examinar las aspiraciones, inquietudes y contradicciones de un sector de la intelectualidad nacional del período.
Variation in NICU Head CT Utilization Among U.S. Children’s Hospitals
Authors: Shannon Megan M. , Burris Heather H. , Graham Dionne A. 
Published: January 2023

OBJECTIVES
Evaluate nationwide 12-year trend and hospital-level variation in head computed tomography (CT) utilization among infants admitted to pediatric hospital NICUs. We hypothesized there was significant variation in utilization.

METHODS
We conducted a retrospective cohort study examining head CT utilization for infants admitted to the NICU within 31 United States children’s hospitals within the Pediatric Health Information System database between 2010 and 2021. Mixed effects logistic regression was used to estimate head CT, head MRI, and head ultrasound utilization (% of admissions) by year. Risk-adjusted hospital head CT rates were examined within the 2021 cohort.

RESULTS
Between 2010 and 2021, there were 338 644 NICU admissions, of which 10 052 included head CT (3.0%). Overall, head CT utilization decreased (4.9% in 2010 to 2.6% in 2021, P &lt; .0001), with a concomitant increase in head MRI (12.1% to 18.7%, P &lt; .0001) and head ultrasound (41.3% to 43.4%, P &lt; .0001) utilization. In 2021, significant variation in risk-adjusted head CT utilization was noted across centers, with hospital head CT rates ranging from 0% to 10% of admissions. Greatest hospital-level variation was noted for patients with codes for seizure or encephalopathy (hospital head CT rate interquartile range [IQR] = 11.6%; 50th percentile = 12.0%), ventriculoperitoneal shunt (IQR = 10.8%; 50th percentile = 15.4%), and infection (IQR = 10.1%; 50th percentile = 7.5%).

CONCLUSIONS
Head CT utilization within pediatric hospital NICUs has declined over the past 12-years, but substantial hospital-level variation remains. Development of CT stewardship guidelines may help decrease variation and reduce infant radiation exposure.
Particulate mass migration and mixing in cylindrically contained explosions
Authors: Hubbard Lance , Reed Clara , Bautista Anjelica , Allen Caleb , Lonsway Maurice , Kinney Erin , Liezers Martin , Foxe Michael , Carman April 
Published: January 2023

AbstractTo explore particulate movement near the plasma of chemical explosions, rugged tracer particles were placed within and on the exterior of metal charges and electrically detonated. The particles were collected on/in the porous walls of plastic cylinders at diameters that correlated to the plasma width during different phases of the explosion. The particles’ positions were determined by Boolean logic analysis of their luminescent intensity. The cylinders which caught particles from the initial phases of the explosion retained placement information, while wider cylinders showed uniform mixing. These results/analysis methodology can help improve the understanding of particulate mixing in harsh environments.
Graphical abstract
Kondisi Terumbu Karang di Kawasan Konservasi Perairan Morowali
Authors: Salanggon Alismi M. , Sallata Alfiani Eliata , Fathuddin Fathuddin , Pramita Eka Aji , Hermawan Roni , Akbar Mohamad 
Published: January 2023

Kawasan konservasi perairan pesisir Morowali merupakan kawasan konservasi yang memiliki hamparan terumbu karang yang begitu luas. Kawasan konservasi dapat berjalan secara optimal apabila dikelola yang efektif berdasarkan pemantauan kondisi ekosistem pesisir dan laut yang dilakukan secara berkala. Upaya yang dapat dilakukan untuk menjaga potensi sumberdaya di kawasan konservasi adalah dengan penyediaan informasi awal mengenai kondisi biofisik terumbu karang di dalamnya termasuk ikan. Tujuan dari penelitian ini untuk mendapatkan data awal mengenai ekosistem terumbu karang; ikan; luasan area tutupan terumbu karang; serta mengetahui indeks keanekaragaman, dominansi, dan keseragaman karang di Perairan Morowali. Metode survei pada penilaian kondisi dan komposisi tutupan terumbu karang menggunakan metode (Underwater Photo Transect = UPT). Pengambilan data ikan dilakukan dengan (Fish Visual Cencus). Pengamatan ikan dilakukan dengan transek pengamatan seluas 5 x 25 meter persegi. Berdasarkan hasil penelitian bahwa persentase karang hidup di Kawasan Konservasi perairan Morowali adalah 23,27% berarti terumbu karang berada dalam kategori rusak. Terumbu karang di kawasan konservasi perairan Morowali memiliki 36 genus dari 15 Famili yang didominasi oleh karang dari Genus Porites (278 individu), Fungia (132 individu), Montipora (108 individu) dan Acropora (94 individu). Hasil pemantauan ikan karang menunjukkan 56 jenis ikan karang berasal dari 18 famili dan 38 genus dengan kelimpahan individu 1.032 individu/m2. Tingginya kerusakan terumbu karang akibat aktivitas manusia dapat diminimalisir melalui pengawasan (monitoring dan surveilance) yang ketat.
Bioconcentration of Lead at Avicennia Marina in Mangunharjo, Semarang Coastal Area
Authors: Hartanto Zallva Arsyta , Hartoko Agus , Haeruddin Haeruddin 
Published: January 2023

This study aims to determine the bioconcentration of heavy metal Lead Pb in seawater, sediment, and mangrove plants of Avicennia marina and to determine the bioconcentration factor of heavy metal Lead Pb in mangrove which was conducted in January 2022 in Mangunharjo coastal area. The method used in this research was a survey method with quantitative analysis. The samples of A. marina mangroves were divided into three categories of stem diameter, namely small (3 – 8 cm), medium (6 – 15 cm), and large (11 – 23 cm). Measurement of heavy metal concentrations using AAS (Atomic Absroption Spectrophotometry). Heavy metal bioconsentration in Mangunharjo is classified as high exceeding quality standards. The study revealed that the concentration of heavy metal Lead Pb in the seawater ranged from 0.672 - 0.867 mg/L, in sediments it ranged from 56.50 – 65.96 mg/kg, and in the roots and leaves of mangroves A. marina ranged from 6.209 – 24,883 mg/kg. The bioconcentration factor of heavy metal Lead Pb ranges from 0.185 to 0.227, so that the mangrove A. marina in Mangunharjo Water Area can be classified as an excluder species.
Accessibility Analysis of Digital Libraries and Specialized Library Resources
Authors: TIURKEDZHY N. S. , DAVYDOVA I. O. , MARINA O. YU. , MARIN S. O. 
Published: January 2023

Objective. The article focuses on the current state of library web content accessibility. Methods. 56 library websites of different countries (27 digital libraries and 29 specialized library resources for people with disabilities) have been successfully tested for the compliance with the WCAG 2.1 standards using the Webaccessibility.com service. Using the Alexa.com service the comparative analysis of the websites traffic ranking has been additionally conducted. Results. It has been established that only 3 websites out of 56 meet the accessibility standards of WCAG 2.1 with the compliance score of 92%. Conclusions. It has been concluded that the libraries' current practices of providing web content accessibility are insufficient. The emphasis has been placed on the need to optimize and promote specialized library resources and to implement a continuous audit of web content accessibility by means of automatic testing and engaging users with disabilities into these processes.
Information Analytics in the Structure of Ukrainian National Libraries Activity (Based on Analysis of their Sites)
Authors: KOBIELIEV O. M. , KARPENKO O. O. , SAFONOVA T. A. , ZIMENKO O. YE. 
Published: January 2023

The objective of the study is to determine the optimal structure for organizing information and analytical activities of Ukrainian libraries of the national level. The method of analysis was used for identifying the diversification of the forms of organization of information and analytical activities of the indicated libraries. The results of the study indicate the existence of two forms of organizing national libraries regarding the implementation of information and analytical activities, one of which is based on realizing their functions in different departments of libraries, and another one is aimed at creating a separate unit in the organizational structures of libraries. The conclusions of the study proved the dependence of the form of organization of information and analytical activities in national libraries on their level in the library system. Creating separate departments carrying out information and analytical activities can be considered as a perspective form of organizing information and analytical activities of Ukrainian national libraries due to the increasing responsibility of employees for the timing of the work and integration of analysts of various specializations, as well as creating conditions for developing the cognitive component of library activity.