bluuebunny/crossref_metadata_2025_split huggingface dataset:
A New Immersed Finite Element Method for Two-Phase Stokes Problems Having Discontinuous Pressure
Authors: Jo Gwanghyun , Kwak Do Young 
Published: April 2023

Abstract
In this paper, we develop a new immersed finite element method (IFEM) for two-phase incompressible Stokes flows. We allow the interface to cut the finite elements.
On the noninterface element, the standard Crouzeix–Raviart element and the

P
0

{P_{0}}

element pair is used.
On the interface element, the basis functions developed for scalar interface problems (Kwak et al., An analysis of a broken

P
1

{P_{1}}

-nonconforming finite element method for interface problems, SIAM J. Numer. Anal. (2010)) are modified in such a way that the coupling between the velocity and pressure variable is different.
There are two kinds of basis functions. The first kind of basis satisfies the Laplace–Young condition under the assumption of the continuity of the pressure variable.
In the second kind, the velocity is of bubble type and is coupled with the discontinuous pressure, still satisfying the Laplace–Young condition.
We remark that in the second kind the pressure variable has two degrees of freedom on each interface element.
Therefore, our methods can handle the discontinuous pressure case.
Numerical results including the case of the discontinuous pressure variable are provided.
We see optimal convergence orders for all examples.
Bounded distance geodesic foliations in Riemannian planes
Authors: Ge Jian , Guijarro Luis 
Published: April 2023

Abstract
A conjecture of Burns and Knieper (1991) asks whether a 2-plane with a metric without conjugate points, and with a geodesic foliation whose lines are at bounded Hausdorff distance, is necessarily flat. We prove this conjecture in two cases: under the hypothesis that the plane admits total curvature, and under the hypothesis of visibility at some point. Along the way, we show that all geodesic line foliations on a Riemannian 2-plane must be homeomorphic to the standard one.
Constant scalar curvature Kähler metrics on ramified Galois coverings
Authors: Arezzo Claudio , Della Vedova Alberto , Shi Yalong 
Published: April 2023

AbstractWe give sufficient conditions for the existence of Kähler–Einstein and constant scalar curvature Kähler (cscK) metrics on finite ramified Galois coverings of a cscK manifold in terms of cohomological conditions on the Kähler classes and the branching divisor. This result generalizes previous work on Kähler–Einstein metrics by Li and Sun [C. Li and S. Sun, Conical Kähler–Einstein metrics revisited, Comm. Math. Phys. 331 2014, 3, 927–973], and extends Chen–Cheng’s existence results for cscK metrics in [X. Chen and J. Cheng, On the constant scalar curvature Kähler metrics (II)—Existence results, J. Amer. Math. Soc. 34 2021, 4, 937–1009].
Multiplicative (generalized)-reverse derivations in rings and Banach algebras
Authors: Koç Sögütcü Emine 
Published: April 2023

Abstract
In this work, the subject of ideal in a semiprime ring with multiplicative
(generalized)- reverse derivations studied is included. We give new
essential results for researchers in this field and generalize some results
found in the literature. Also, the application of continuous reverse
derivations in Banach algebras is discussed for the first time.
Role of α-Fe2O3 nano-particles in protecting wood from ultraviolet light degradation
Authors: Yi Tengfei , Morrell Jeffrey J. 
Published: April 2023

Abstract
The incorporation of nano-particles into coatings to protect wood against UV light has tremendous potential for improving coating performance. However, the understanding of the mechanisms by which these particles function on wood surfaces remains limited. The distribution and potential chemical interactions between alpha Fe2O3 and wood were studied. The ability of different sizes of Fe2O3 particles to intercept various wavelengths of light was assessed using ultraviolet/visible (UV–vis) spectroscopy using TiO2 and ZnO particles for comparison. All particles intercepted UV light, but α-Fe2O3 also intercepted a portion of the visible spectrum which might help explain its better performance. Scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM-EDS) analysis of α-Fe2O3 nano-particle distribution on different wood orientations of radiata pine (Pinus radiata D. Don) and shining gum (Eucalyptus nitens) showed that iron particles were uniformly distributed on both pine and shining gum, but provided better UV protection to the more permeable radiata pine surfaces. Characterization of chemical interactions between α-Fe2O3 and isolated lignin and cellulose by Fourier Transform Infrared Spectroscopy (FTIR) suggested substantial interactions between these particles and lignin components, but little interaction with cellulose. The results suggest that the role of nano-particles in the UV protection of wood surface is to intercept and disperse the light energy while interacting with the wood.
Euler–Maruyama algorithm in estimating UGV path and location in nuclear emergency and security applications
Authors: Zaky Hany Nasry , Abd Elfatah Mohamed G. , El-Mongy Sayed A. , Abdel-Rahman Mohamed A.E. 
Published: April 2023

Abstract
Mobile Robots (MR) are currently used across a variety of different sectors and have military, nuclear and industrial applications among others. In unmanned systems, teleoperation sensors, navigation instruments, control systems and radiation sensors can be fixed on the MR to perform required tasks such as radiological scanning, identifying, and surveying the contaminated environment that has been exposed to radiation. In this work, an estimation of the mobile robot location and the optimum path for time-delay compensation for MR teleoperation are investigated. As the MR teleoperation has a stochastic nature, the kinematics equations are modeled using stochastic differential equations (SDEs). Afterwards, these SDEs are solved using Numerical algorithms such as Euler–Maruyama algorithm which is used to approximate SDEs solution with the aid of MATLAB. Additionally, the results are discussed and depicted in tables and figures. Finally, the simulated results for the solution are performed and are found to highly agree with the ideal path of the simulated MR. This result is of great importance to be used in the case of nuclear emergency response and mitigation.
Biocompatibility of biomaterials and test methods: a review
Authors: Karakullukcu Altun Buse , Taban Emel , Ojo Olatunji Oladimeji 
Published: April 2023

Abstract
Biomaterials research has gained considerable momentum recently. The development of technology and the changing human lifestyles have also changed human health needs. The developed materials for use in different areas like in medical products and living bodies have necessitated adding biocompatibility to the mechanical, physical, and chemical properties of these materials. This article is a review of the concept and evaluation of biocompatibility. It explains how biomaterials change with the development of technology, human changing lifestyles, and needs, and how these materials are developed with the same technology. It contains what biocompatibility is, the factors that affect biocompatibility, what can happen in case of low biocompatibility, and the standards and work plans required for tests such as hemocompatibility, genotoxicity, toxicokinetic, and immunotoxicology for biocompatibility..
Effect of boric acid addition to seawater on wear and corrosion properties of ultrashort physical vapor deposited Ti layer on a 304 stainless steel
Authors: Karabeyoğlu Sencer Süreyya , Eker Bülent , Yaman Paşa , Ekşi Olcay 
Published: April 2023

Abstract
AISI 304 stainless steel specimens are deposited with Ti using physical vapor deposition method for 3, 5, and 8 min. Then, specimens are subjected to wear test with 10 and 20 N applied loads in seawater and boric acid reinforced seawater. Optical microscope and scanning electron investigations showed that ultrashort PVD process formed non-uniform Ti deposit zones on the substrate. Abrasive wear mechanism is observed for 10 N applied load and increasing the applied load to 20 N transformed the wear into adhesive which is attributed to counteract dynamic reaction of the surface. Besides, boric acid addition to seawater lowered the wear rate and coefficient of friction for all tests and stick-slip phenomenon is removed in boric acid addition. In corrosion properties, boric acid addition improved the corrosion resistance of the specimens.
Heat treatment effects on near threshold region for AISI 4340 steels
Authors: Çalışkan Salim , Gürbüz Rıza 
Published: April 2023

Abstract
The microstructure effect is critical in the near-threshold region in terms of fatigue crack propagation. Despite numerous studies on the crack growth phenomenon in the literature, there is still no comprehensive understanding of the mechanism behind it. The fatigue crack growth mechanism occurs in the plastic zone region, which is quite small in size; the order is regarded as microstructural units, particularly at low stress intensities. Microstructural differences caused by heat treatment methods are frequently attributed to changes in monotonic and yield strength, resulting in differences in plastic zone size. The driving force required for crack growth under alternating loading is proportional to the plastic zone size ahead of the crack tip. When the microstructure is modified using isothermal transformations, the stress intensity near the threshold and corresponding crack propagation rates were found to be affected by stress ratio, material yield strength, particle size distribution, and impurity segregation. The crack growth threshold ΔK
0 is discovered to be inversely related to steel strength, and a relationship between ΔK
0 and cyclic yield stress is established. In the scope of this paper, annealed and tempered conditions were investigated to assess near threshold behavior for AISI 4340 steel. Effect of microstructure will be detailed around low stress intensities via performed crack growth tests.
Electrochemical photonics: a pathway towards electrovariable optical metamaterials
Authors: Edel Joshua B. , Ma Ye , Kornyshev Alexei A. 
Published: April 2023

Abstract
This review article focuses on the latest achievements in the creation of a class of electrotuneable optical metamaterials for switchable mirrors/windows, variable colour mirrors, optical filters, and SERS sensors, based on the voltage-controlled self-assembly of plasmonic nanoparticles at liquid/liquid or solid/liquid electrochemical interfaces. Practically, these experimental systems were navigated by physical theory, the role of which was pivotal in defining the optimal conditions for their operation, but which itself was advanced in feedback with experiments. Progress and problems in the realisation of the demonstrated effects for building the corresponding devices are discussed. To put the main topic of the review in a wider perspective, the article also discusses a few other types of electrovariable metamaterials, as well as some of those that are controlled by chemistry.
O QUE É POSSÍVEL APRENDER ASSISTINDO SÉRIES
Authors: Silva José Rodolfo , Do Carmo Melo Iuli , Ferrari Anderson 
Published: April 2023

As pedagogias culturais oportunizam um olhar diferenciado para educação prezando pelas múltiplas formas de ser, estar, ensinar e aprender dos sujeitos. Valendo-nos dessa possibilidade e apoiados na perspectiva pós-estruturalista, o presente artigo tem como objetivo refletir sobre a série Anne with E. Uma produção que, baseada no livro de Anne de Green Gables, que traz elementos discursivos e cenográficos, para se pensar as relações de gênero e explorar as potencialidades das pedagogias culturais. Desse modo, quando questionamos o que é possível aprender assistindo séries? Nos concentrando na representação de feminilidade expressa na personagem Anne, analisamos de que forma como os modos de endereçamento[1], da produção podem afetar masculinidades e feminilidades educando para possibilidades de desconstrução de aspectos agressivos referente a masculinidades e submissão de feminilidades atribuídos como naturais de caráter essencialista produzindo circunstâncias de violência e discriminação. Portanto, nos concentramos na representação de feminilidade expressa por Anne.
A Targeted, Low-Throughput Compound Screen in aDrosophilaModel of Neurofibromatosis Type 1 Identifies Simvastatin and BMS-204352 as Potential Therapies for Autism Spectrum Disorder (ASD)
Authors: Dyson Alex , Ryan Megan , Garg Shruti , Evans D. Gareth , Baines Richard A. 
Published: April 2023

AbstractAutism spectrum disorder (ASD) is a common neurodevelopmental condition for which there are no pharmacological therapies that effectively target its core symptomatology. Animal models of syndromic forms of ASD, such as neurofibromatosis type 1, may be of use in screening for such treatments.Drosophilalarvae lackingNf1expression exhibit tactile hypersensitivity following mechanical stimulation, proposed to mirror the sensory sensitivity issues comprising part of the ASD diagnostic criteria. Such behavior is associated with synaptic dysfunction at the neuromuscular junction (NMJ). Both phenotypes may thus provide tractable outputs with which to screen for potential ASD therapies. In this study, we demonstrate that, while loss ofNf1expression within the embryo is sufficient to impair NMJ synaptic transmission in the larva, constitutiveNf1knock-down is required to induce tactile hypersensitivity, suggesting that a compound must be administered throughout development to rescue this behavior. With such a feeding regime, we identify two compounds from a targeted, low-throughput screen that significantly and consistently reduce, but do not fully rescue, tactile hypersensitivity inNf1P1larvae. These are the HMG CoA-reductase inhibitor simvastatin, and the BKCachannel activator BMS-204352. At the NMJ, both compounds induce a significant reduction in the enhanced spontaneous transmission frequency ofNf1P1larvae, though again not to the level of vehicle-treated controls. However, both compounds fully rescue the increased quantal size ofNf1P1mutants, with simvastatin also fully rescuing their reduced quantal content. Thus, the further study of both compounds as potential ASD interventions is warranted.
Análise de assinaturas estáticas produzidas em tela
Authors: Okado Jessica Baleiro , Diana Mariana Cepollaro 
Published: April 2023

Este trabalho comparou assinaturas físicas em papel e caneta e produzidas em tela de celular com diferentes instrumentos: dedo indicador e mínimo livres, dedo em posição de pinça (“finger pen adaptada”), e caneta stylus em tela de celular, sem treino prévio e com treino de dois minutos. Foram analisados diferentes elementos discriminadores da escrita (morfologia, alógrafos, método de construção, andamento, espaçamentos interliterais e intervocabulares, conexões, alinhamentos, inclinação, calibre, proporção, velocidade, dinamismo, qualidade do traçado, ataques e remates, valores angulares e curvilíneos). As amostras foram produzidas por 20 voluntários adultos com escrita automatizada. De maneira geral, os elementos discriminadores da escrita que mais apresentaram alteração foram: qualidade do traçado, valores angulares e curvilíneos, calibre e dinamismo. Os que apresentaram menor alteração em relação às assinaturas em papel e caneta foram o método de construção e alógrafos utilizados. Os resultados vão de encontro a literatura, reforçando que a ponta dos dedos não possui a mesma precisão e acurácia que o uso de caneta, apresentando menor reprodutibilidade de traçado. O instrumento em tela mais comparável com papel e caneta foi uso de caneta stylus. Com relação ao treino, os resultados corroboram achados anteriores de que o treino auxilia na adaptação do movimento grafomotor, em especial no caso de dedos desprovidos de memória muscular. Observou-se ainda que assinaturas totalmente estilizadas apresentaram menor mudança qualitativa que assinaturas legíveis.
Comparative evaluation of the efficacy of coronally repositioned flap with PRF and with placental membrane allograft (Amniotic Membrane) in the treatment of gingival recession
Authors: Anamika  , Singh Sneha , Nabi Aaysha Tabinda , Kumar Deepak , Verma Neha , Sinha Amit 
Published: April 2023

Gingival recession presents a significant aesthetic problem in dental patients. A variety of surgical techniques have been used to cover these defects. The present study was carried out on 30 selected sites having either Miller’s Class I or II marginal tissue recession. This is a clinical study designed as a split mouth randomized controlled trial. Each site constitutes one sample of the study. 15 sites were randomly assigned for the test group (Coronally Advanced Flap with Amnion membrane) and another 15 sites were assigned for the control group (CAF with PRF). All subjects received clinical periodontal examination by a single examiner.There was a statistically non significant difference seen for the values between the inter and intra groups (p&#62;0.05) for RD at all time intervals.Both the treatment modalities for gingival recession coverage demonstrated a significant improvement in the recession coverage and width of keratinized gingiva and can be used in treatment of gingival recession defects.
Can Typical Cervical Vertebrae Be Distinguished From One Another By Using Machine Learning Algorithms? Radioanatomic New Markers
Authors: ŞENOL Deniz , SEÇGİN Yusuf , TOY Şeyma , ÖNER Serkan , ÖNER Zülal 
Published: April 2023

Objective: The aim of this study is to distinguish the typical cervical vertebrae that cannot be separated from one another with the naked eye by using machine algorithms (ML) with measurements made on computerized tomography (CT) images and to show the differences of these vertebrae.
Method: This study was conducted by examining the 536 typical cervical vertebrae CT images of 134 (between the ages of 20 and 55) individuals. Measurements of cervical vertebrae were made on coronal, axial and sagittal section. 6 different combinations (Group 1: C3 – C4, Group 2: C3 – C5, Group 3: C3 – C6, Group 4: C4 – C5, Group 5: C4 – C6, Group 6: C5 – C6) were formed with parameters of each vertebrae and they were analyzed in ML algorithms. Accuracy (Acc), Matthews correlation coefficient (Mcc), Specificity (Spe), Sensitivity (Sen) values were obtained as a result of the analysis.
Results: As a result of this study, the highest success was obtained with Linear Discriminant Analysis (LDA) and Logistic Regression (LR) algorithms. The highest Acc rate was found as 0.94 with LDA and LR algorithm in Groups 3 and Group 4, the highest Spe value was found as 0.95 with LDA and LR algorithm in Group 5, the highest Mcc value was found as 0.90 with LDA and LR algorithm in Group 5 and the highest Sen value was found as 0.94 with LDA and LR algorithm in Groups 3 and 5.
Conclusion: As a conclusion, it was found that typical cervical vertebrae can be clearly distinguished from one another by using ML algorithms.
Penerapan model regresi multilevel untuk data ketepatan waktu lulus mahasiswa
Authors: Ula Rahmatul , Ibnas Risnawati , Nurfadilah Khalilah , Nawawi M. Ichsan , Asfar Asfar 
Published: April 2023

Multilevel logistic regression is one of the alternatives to solving a problem that has a nested data structure like the student data in Alauddin in 2016. The data indicates that students are nested in each different study program. This condition allows the students in the same study program tend to have similar characteristics. The study aims to gain a student graduating model of punctuality using multilevel regression analysis and recognize factors that have a significant impact on student graduating time. Based on our research, we find the best model that fits the data to be the random intercepts model with a random slope of gender variable. The variables that have significant effects are gender, cumulative achievement index, educational background, and accredited program.
Keywords: logistic regression, nested, multilevel logistic regression, graduation of studentMSC2020: 62J05
Implementasi metode Ward clustering untuk klasterisasi penduduk yang memiliki jaminan kesehatan pada kabupaten dan kota di Provinsi Maluku
Authors: Matdoan Muhammad Yahya , Balami Abdul Malik , Talakua Mozart Winston 
Published: April 2023

The Health Insurance Program is a protection guarantee for comprehensive health services which includes promotive, preventive and curative and rehabilitative services provided in stages for the community/participants whose contributions are paid by the government. The health insurance program in Maluku Province from year to year has been getting better. However, there are still disparities or gaps between regions in Maluku Province, so it is necessary to study the clusterization of the population who have health insurance in districts/cities in Maluku Province. Ward clustering method is a method that aims to get a cluster that has the smallest possible internal cluster variance. The purpose of this study is to obtain a cluster of residents who have health insurance in districts/cities in Maluku Province. The data used in this study were sourced from Maluku publications in figures at the Maluku Province BPS. This study obtained the results that there are 3 clusters in the cluster of residents who have health insurance in districts/cities in Maluku Province with details of cluster 1 consisting of Tanimbar Islands Regency, Central Maluku, Buru, West Seram, East Seram and South Buru District. Cluster 2 consists of Southeast Maluku Regency, Aru Islands, Southwest Maluku and Tual City. Furthermore, Cluster 3 consists of Ambon City.
Keywords: Clustering, health insurance, wardMSC2020: 62H30
Solusi optimal masalah transportasi biaya tetap menggunakan metode pendekatan tangga
Authors: Rahayu Nizmi Fitri , Muhtarulloh Fahrudin , Nuraiman Dian 
Published: April 2023

One special case in transportation problems is the problem of fixed cost transportation, where in this transportation problem there are two cost components, namely fixed costs and variable costs. The difficulty encountered when solving the problem of fixed costs is caused by the behavior of these costs which do not depend on the number of units loaded/transported on the route traversed. The purpose of this study is to determine the optimal solution to the fixed cost transportation problem. This research uses Balinski's linear approach, namely the Stairs Approach Method. The case study used is unbalanced data measuring 3x8, where the fixed costs are vehicle rental costs and the variable costs are fuel. The optimal solution obtained is Rp. 11511.411.768.000,- (eleven trillion five hundred eleven million five hundred eleven billion four hundred eleven million seven hundred sixty-eight thousand rupiah). So it can be concluded that the Ladder Approach Method can be used to find the optimal solution to the fixed cost transportation problem.
Keywords:Fixed costs, transportation problems, stairs approach method, optimal solutionMSC2020:76N25