bluuebunny/crossref_metadata_2025_split huggingface dataset:
Leptonic di-flavor and di-number violation processes at high energy
colliders*
Authors: Yang 杨 Jin-Lei 金磊 , Chang 张 Chao-Hsi 肇西 , Feng 冯 Tai-Fu 太傅 
Published: December 2023

Abstract
The leptonic di-flavor violation (LFV) processes

and

and leptonic di-number violation (LNV) processes

(

) at same-sign high energy

colliders are studied. The new physics (NP) factors that may play roles in these processes are highlighted by cataloging them into three types. Taking into account the experimental constraints, the processes at

colliders are computed, and the results are presented properly. The results lead to the conclusion that observing the NP factors through the LFV and LNV processes at TeV-energy

colliders has significant advantages that cannot be achieved elsewhere. Therefore, once the techniques for muon acceleration and collision are developed successfully, the option of building same-sign high energy muon colliders should be seriously considered.
Roadmap towards the redefinition of the second
Authors: Dimarcq N , Gertsvolf M , Mileti G , Bize S , Oates C W , Peik E , Calonico D , Ido T , Tavella P , Meynadier F , Petit G , Panfilo G , Bartholomew J , Defraigne P , Donley E A , Hedekvist P O , Sesia I , Wouters M , Dubé P , Fang F , Levi F , Lodewyck J , Margolis H S , Newell D , Slyusarev S , Weyers S , Uzan J-P , Yasuda M , Yu D-H , Rieck C , Schnatz H , Hanado Y , Fujieda M , Pottie P-E , Hanssen J , Malimon A , Ashby N 
Published: December 2023

AbstractThis paper outlines the roadmap towards the redefinition of the second, which was recently updated by the CCTF Task Force created by the CCTF in 2020. The main achievements of optical frequency standards (OFS) call for reflection on the redefinition of the second, but open new challenges related to the performance of the OFS, their contribution to time scales and UTC, the possibility of their comparison, and the knowledge of the Earth’s gravitational potential to ensure a robust and accurate capacity to realize a new definition at the level of 10−18uncertainty. The mandatory criteria to be achieved before redefinition have been defined and their current fulfilment level is estimated showing the fields that still needed improvement. The possibility to base the redefinition on a single or on a set of transitions has also been evaluated. The roadmap indicates the steps to be followed in the next years to be ready for a sound and successful redefinition.
Stochastic modelling of daily air pollution in Burgas, Bulgaria
Authors: Koleva S K , Gocheva-Ilieva S G , Kulina H N 
Published: December 2023

Abstract
Exceeding the norms and limits of atmospheric air pollution causes enormous damage to the population’s health and the environment. Determining the factors affecting air quality is a current task in a local, regional, and global scale. In this study, we use daily time series data for the main air pollutants in Burgas, Bulgaria – O3, NO, NO2, CO, SO2, and PM10, to analyze, model, and forecast these levels depending on meteorological factors. For this purpose, the stochastic ARIMA method and ARIMA with transfer functions are applied. Results are obtained for univariate and multivariate time series. Particular attention is paid to the concentrations of the secondary pollutant ground-level ozone (O3), which are modelled as a function of all variables considered. Results were evaluated using root mean square error, mean absolute percentage errors, and the coefficient of determination. Short-term forecasts have been obtained for seven days ahead. Model accuracy up to 84% has been established.
Intuitionistic fuzzy seasonal variation analysis of marine biotoxin distribution in the Black Sea
Authors: Traneva Velichka , Tranev Stoyan 
Published: December 2023

Abstract
It is crucial to establish a seasonal dependence on the levels of marine biotoxins in the Black Sea to impose seasonal prohibitions on the gathering of marine species in this sea and safeguard human health. Fisher’s analysis of variance (ANOVA) is a statistical technique for assessing how various variables affect a collection of data. In some cases, research must be carried out in an uncertain environment, with missing or insufficient data. An approach for solving this imprecision when a data set occurs in an ambiguous context is intuitionistic fuzzy logic, which Atanassov introduced in 1983. Compared to fuzzy data, intuitionistic fuzzy (IF) data also has a hesitation degree. In 2020, we first suggested the one-way (1-D) IFANOVA and the software utility for its performance, combining traditional variational analysis with modeling opportunities of Index Matrices (IMs) and Intuitionistic Fuzzy Sets (IFSs). The current study focuses on 1-D IFANOVA of the distribution of marine biotoxins in the Black Sea by the “season” factor on the IF dataset of the number of marine biotoxins for the period from February 1 to July 31, 2021. We will also compare the findings of 1-D IFANOVA and conventional ANOVA performed on the identical data set.
Radiation effects model for Ultra-Thin Silicon Solar Cells
Authors: Fedoseyev Alex , Gurimskaya Yana , Herasimenka Stanislau , Reginevich Mikhail , Cooper Charles , Grdanovska Slavica , Kroc Thomas 
Published: December 2023

Abstract
This work is focused on investigation of radiation effects in Ultra-Thin Silicon solar cells with a particular emphasis on electron irradiation. The study is motivated by the application of these solar cells, developed by Solestial, Inc., for powering space missions, including those led by NASA, the Department Of Defence (DOD), and commercial satellite missions. Our research encompasses both experimental and theoretical approaches, addressing unique challenges posed by ultra-thin solar cell technology that deviates from the traditional models. From the experimental point of view, the test structures were irradiated with 1 MeV electrons up to the fluence of 1E+15 e/cm
2. Radiation effects due to accumulated electron dose were noticed as a drop in open-circuit voltage (Voc
). An analytical expression for modeling the Voc characteristic of the UT-Si cell after exposure to electron irradiation was formulated and subsequently compared with experimental data. The theoretical foundation of the proposed approach builds upon the Non-Ionising Energy Loss (NIEL) concept, a fundamental parameter in addressing radiation damage modelling and survivability predictions.
Logistic probability function: an analysis and modification from the perspective of reaction network theory
Authors: Lazarova Meglena , Markov Svetoslav , Vassilev Andrey 
Published: December 2023

Abstract
In this work we study some characteristics of growth functions of the logistic type. The standard logistic function and the 2-logistic growth function are solutions of ordinary differential equations derived from the perspective of reaction network theory. These solutions are compared in terms of their shape. We are interested in the new 2-logistic probability distribution and its characteristics. Using the tools of reaction network theory and numerical methods we derive some properties of this distribution.
Mathematical modeling of non-stationary deformation of cylindrical structures
Authors: Korotunova O , Mastynovsky Yu , Shyshkanova G 
Published: December 2023

Abstract
The paper investigates the dynamic behavior of a hollow elastic cylinder of finite length, placed in a rigid cylindrical shell, under a sharp change in internal pressure. A numerical solution of a two-dimensional dynamic problem is obtained using the method of spatial characteristics. The stress-strain state of an elastic cylinder is described by a system of hyperbolic equations with two circular conical surfaces as characteristic surfaces. The outer cones correspond to longitudinal waves; the inner ones correspond to transverse waves. The calculations were carried out under various conditions at the ends and the outer (contact) surface of the cylinder and shell. An analysis of the results for a cylinder with load-free ends shows that the absence of gluing the outer surface of the cylinder with the shell leads to a significant increase in the velocities of the points of the cylinder. Under the action of internal pressure, the ends move apart, resulting in a significant increase in the radial velocities of the internal channel. Qualitative patterns of behavior of the structures under consideration, which are widely used in mechanical engineering, on impact-type impacts, can be used to improve and optimize them at the design stage.
Simple layer potential expansion for optimization of contact interaction taking into account friction and adhesion
Authors: Shyshkanova G , Walther A 
Published: December 2023

Abstract
Friction plays a crucial role in the formation of contact problems, particularly through adhesion. This paper focuses on a quasi-static three-dimensional problem of a punch movement along the boundary of an elastic half-space. The investigation considers friction and adhesion forces, employing a two-term friction law. The objective is to optimize the pressure distribution beneath the punch. The shape of the punch serves as the design variable, while the deviation of the pressure distribution, originating from a given one, is minimized. The optimization problem can be divided into two sequentially solvable sub-problems. The first task involves finding a pressure distribution that minimizes the performance functional, which has a known solution. The second problem entails searching for the optimal shape of the punch to achieve the previously determined pressure distribution. A numeric-analytical solution is developed based on the expansion of the simple layer potential. The coefficients characterizing friction and adhesion act as small parameters. The proposed method gives the ability to obtain closed-form formulas in each approximation, enabling convenient qualitative analysis and practical engineering applications. The calculations and analytical dependence reveal an asymmetric distribution of pressure on the contact area, during the movement of an axisymmetric punch.
Parallel scalability of sparse solvers for sparsified fractional diffusion problems discretized with FEM
Authors: Slavchev D , Margenov S 
Published: December 2023

Abstract
Anomalous diffusion is a non-local process that describes a wide spectrum of natural processes and phenomena with many applications in science and technology. It is described mathematically by the fractional Laplace operator. In this work we examine the integral definition of the fractional Laplacian modeled with the Riesz potential and discretized with the finite element method. The thus obtained system of linear algebraic equations is dense due to the non-local nature of the fractional Laplacian and is computationally complex to solve. With LU factorization, for example, solving the problem has an O(N
3) computational complexity, where N is the number of unknowns. However, it can be observed that a large amount of the off-diagonal coefficients have very small absolute values compared to the diagonal coefficients. Those small off-diagonal coefficients can be lumped (set to zero and added to the diagonal coefficient) without significant loss of accuracy. In this work we employ a direct sparse parallel solver to the resultant sparse matrix. We analyze the parallel performance and speed-up, as well as the accuracy, varying the fractional power and the lumping threshold.
Advanced Stochastic Approaches for Fredholm Integral Equations
Authors: Todorov Venelin , Georgiev Slavi 
Published: December 2023

Abstract
Integral equations are of high applicability in different areas of applied mathematics, physics, engineering, geophysics, electricity and magnetism, kinetic theory of gases, quantum mechanics, mathematical economics, and queuing theory. That is why it is reasonable to develop and study efficient and reliable approaches to solve integral equations. For multidimensional problems the existing biased stochastic algorithms based on evaluation of finite number of integrals will suer more from the effect of high dimensionality, because they are based on quadrature points. So we need advanced unbiased algorithms for solving the multidimensional problem which is developed in this paper. A new unbiased stochastic method for solving multidimensional Fredholm integral equations of second kind is proposed and analysed. We compared the newly proposed unbiased algorithm with the old unbiased stochastic algorithm for the one dimensional problem and multidimensional problem.
New “Walk on Equations” Monte Carlo Algorithm for Linear Systems
Authors: Todorov Venelin , Georgiev Slavi , Apostolov Stoyan 
Published: December 2023

Abstract
A novel version of Monte Carlo algorithm for solving systems of linear algebraic equations is presented and studied. The algorithm is similar to the “Walk on Equations” Monte Carlo method recently developed by Ivan Dimov, Sylvain Maire and Jean Michel Sellier. It is done a comparison with the Gauss-Seidel method for matrices up to size of 212. The algorithm could be drastically improved by choosing appropriate values for the relaxation parameters, which in turn leads to dramatic reduction in time and lower relative errors for a given number of iterations. What is more, a sequential Monte Carlo method of John Halton based on an iterative use of the control variate method has been applied. Some of the most important numerical applications are the large system, coming from a finite element approximation of problems, describing a beam structure in constructive mechanics, and the block-diagonal matrices, which come from discretization of models in a regime-switching economy.
The sound horizon scale at the baryon drag epoch
Authors: de Carvalho E , Bernui A , Avila F 
Published: December 2023

Abstract
We study how to measure the sound horizon scale at the baryon drag epoch, rs
, a parameter considered a cosmological standard ruler, from the 2-point correlation function analysis. This important parameter is originated in the baryon acoustic oscillations (BAO) phenomenon, which supports the large-scale structure scenario of the ΛCDM cosmological model, and provides valuable information of the dynamical evolution of the Universe. For this, one of the aims of current astronomical surveys is to know this parameter with high precision. Here we study how to correctly extract the BAO sound horizon scale in case where the signature is weak because there are few correlated pairs, sourced from the BAO phenomenon, probably due to non-linear evolution processes.
Mass Generation of the Scalars Bosons in a Left-Right Symmetric Model with two Bidoublets
Authors: Diaz Henry , Pereyra Ravinez O , Lopez Lozano C 
Published: December 2023

Abstract
The search for new Physics justified by new discoverys, motivate among others, the realization of new models called Extensions of the Standard Model (ESM) which must include at low energy the Standar Model. (SM) The electroweak symmetry group SU(2)
L
⊗ U(1)
Y
to the gauge group with left-right symmetry SU(2)
L
⊗ SU(2)
R
⊗ U(1)
B
−
L
⊗ 𝒫, represents one of the minimal extensions of the SM, in which 𝒫 is a parity discrete symmetry such that left-right coupling constants satisfied gL
= gR
, and according to the hierarchy in the symmetry breaking (conditions that must be met by the vacuum expectation values introduced in the model) allow to obtain the SM. The aim of this work is to identify the Higgs boson of the SM, considering a more general scalar potential that must respect all the symmetries (local gauge invariant, discrete symmetries and Lorentz invariant) established in the model. We will take into account those previous works about the hierarchy conditions and certain approximations that must satisfy the vacuum expectation values for obtain greater simplicity in the caculations of scalar masses of the model.
Monitoring near-field acoustic emission from confined water under shear interaction with blunt tips
Authors: Supichayanggoon Kacharat , Brockman Theodore , La Rosa Andres H 
Published: December 2023

Abstract
Mesoscopic water adhered to a surface at ambient conditions is typically reported to behave as sticky glue. Still, Shear-force Acoustic Near-field Microscopy (SANM), complemented with the Whispering Gallery Acoustic Sensing (WGAS) technique, has demonstrated the ability of a water meniscus, formed at the nanometer-sized gap between a sharp probe and a flat surface, to remain flexible enough for emitting near-field acoustic waves while being subjected to shear interactions exerted by a laterally oscillating probe. To gain insights on the meniscus formation process, as well as to better understand its viscoelastic response, purposely blunt probes (composed of multiple sharp asperities) are used. The experimental results suggest the stochastic formation and break of water bridges at multiple asperities on the probe, each providing an energy dissipation channel from the lateral motion of the probe to the fluid. Despite heavily damping the lateral motion of the probe, the ability of the large fluid meniscus to emit acoustic wave is recovered by properly increasing the amplitude of the lateral oscillations of the probe. Overall, monitoring the behavior of large meniscus adhered to a blunt probe allows to infer the behavior of smaller volume meniscus adhered to sharp probes.
Reconstruction of high-energy shower cores in MATHUSLA
Authors: Asto Rojas O M , Arteaga Velázquez J C , Caballero Mora K S , Solano Salinas C J 
Published: December 2023

Abstract
In this work, we show the results of a comparative analysis of different reconstruction methods of shower cores produced by Cosmic Rays (CR’s) in a layer of Resistive Plate Chambers (RPC’s) that is under consideration for MATHUSLA (Massive Timing Hodoscope for Ultra-Stable neutraL pArticles). The analysis was performed with Monte Carlo simulations. Extensive air showers were simulated with CORSIKA using the GEISHA and QGSJET-II-04 hadronic interaction models for primary protons and iron nuclei in the energy range from 10 TeV to 100 PeV and zenith angles: θ ≤ 20°. The detector response was simulated with a simplified Python-based program. The location of the shower core was found using the center of mass of the deposited charge distribution, the maximum of the charge distribution, a fit with an exponential function to the projected distributions on the X and Y horizontal directions of the 2D charge distributions, and fits with an exponential and a Nishimura-Kamata-Greisen (NKG) lateral functions to the 3D charge distributions of the RPC. We found that the fits of the X and Y projections with an exponential function and the fits with a NKG function to the 3D signal distributions have a better performance than the other methods.
Performance of sustainable livelihoods assets in coastal communities in dealing with climate change: A case study at Kuaro District, Paser Regency
Authors: Kristiningrum R , Sari W I R , Chaniago H D 
Published: December 2023

Abstract
Sustainable livelihood assets in coastal areas have become part of climate change. Coastal communities as actors and users of assets for the sustainability of these sustainable livelihood assets, for example, the Harapan Baru Village, the majority of whom work as fishermen depend on marine resources. To climate balance and changes in sustainable livelihood assets due to natural, social, economic, human resource, and infrastructure factors. The focus of this research is to find the performance of sustainable livelihood assets of coastal communities facing climate extremes. The research method is a mixed method quantitative with accidental sampling and qualitative by exploring people’s perceptions through semi-structured interviews and observation on sustainable livelihood and climate change. The results show that the performance of sustainable livelihood assets of coastal communities is strongly influenced by climate change and its impacts. Social justice aspects are influenced by ecosystems, human resources, and infrastructure related to the difficulties of time, distance, and natural resource instability. In short, climate extremes bring change to impact aspects of sustainable livelihoods, especially the economy, which causes people to find it difficult to make ends meet. This condition, within a certain period, affects the ability and performance of sustainable livelihood assets for coastal communities.
Epiphytic Host Tree Identification In Samarinda Botanical Garden
Authors: Yahya Z , Sujalu A P , Kamarubayana L , Emawati H , Napitupulu M , ismail Ismail , Jannah Noor 
Published: December 2023

Abstract
Epiphytes are one of the most diversiform plants, which its species richness peak in the tropic and subtropics. The objective of this study is to explore the different types of phorophyte. This research used the single plot method, as many as 100 plots, each measuring 10m x 10m, randomly distributed in Main Protected Zone of the Samarinda Botanical Garden. In each plot, the following data recorded the species name and individual numbers of phorophytes. The phorophyte in the old secondary forest area to the amount of 66 trees are consisting of 30 species of 29 families. The number of phorophytes is mostly in the diameter class between 21-38 cm. The Family of Dipterocarpaceae and species of Borassodendron borneensios, being the phorophyte which has got the most one in which each 8 species and 9 trees are existed in the forest.
The perception of Belat fishermen in Gunung elai Village about the determination of Kedindingan island waters as a conservation area (case in Bontang City, East Kalimantan Province)
Authors: Sugiharto E , Juliani  , Marshal  
Published: December 2023

Abstract
This study aims to: 1) Determine the profile of Belat fishermen who catch on the Kedindingan island. 2) Knowing the perception of Belat fishermen towards conservation areas on the island of the wall. The sampling method used is a saturated sampling technique, which is sampling as a whole from the existing population, which is as many as 7 respondents. The data analysis method used is the Likert scale to determine the opinions or perceptions of fishermen on the designation of conservation areas. The results of this study show that fishermen’s perceptions based on indicators, cumulatively, internal factors that support the perception of splint fishermen towards the establishment of Kedindingan Island waters as a conservation area are at a value of 34.00 (medium).
Composition and Structure of Mangrove Species in Sekurau Bawah Hamlet, East Kutai Regency, East Kalimantan
Authors: Aipassa M I , Siahaya M E , Suyatna I , Hernandi F , Kristiningrum R , Sarwono E , Ruslim Y , Duakaju N N , Mursidah  , Kristina F 
Published: December 2023

Abstract
The aim of this research is to explore the species composition and structure of mangrove forests in Sekurau Bawah Hamlet, Sekerat Village, Bengalon District, East Kutai Regency, East Kalimantan Province. Although the mangrove vegetation in Sekurau Bawah Hamlet is thick, there is still a lack of information on the composition and structure of the species. Therefore, research is needed to explore the biological resources around the mangrove forest area. The collection of vegetation data was done by combining the path method and compartmentalizing it. The plot areas for each growth stage are seedling, sapling and tree levels. The point of observation is determined purposively. The results of the study showed the highest Important Value Index (IVI) for growth for both seedling and sapling growth was of the Bruguiera parviflora species, while the tree level was of the Avicennia marina specie based on the representative condition of the mangrove vegetation studied.