bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modification of chaotic interleaver for turbo codes with a change to the duffing equation and accounting for the distance spectrum of the code
Authors: Topalov Vladislav , Tregubova Iryna , Severyn Mykola , Hurklis Iryna 
Published: December 2023

Various types of interleavers in turbo codes and their parameters affecting the efficiency of turbo codes are considered. It is noted that the type of interleaver directly affects the efficiency and error correcting of turbo codes. Also, the efficiency of turbo codes is influenced by the parameters of the minimum distance, the length of interleaver, and the distance spectrum of the code.
A modification of the chaotic interleaver of turbo codes is proposed with the change of the equation to the Duffing and with examining the code's distance spectrum with the condition of increasing the code's distance between the code words with a small weight. The algorithm for modifying the chaotic interleaver with the Duffing equation and with examining the code's distance spectrum of turbo codes is presented. The characteristics of the modified chaotic interleaver with the Duffing equation and with examining the code's distance spectrum of turbo codes according to various parameters of turbo codes are given. This modification of the interleaver of turbo codes increased the minimum distance between elements for different lengths of the interleaver and polynomials of the turbo code by 10 % …33 %. Given this, there was an increase in the energy efficiency of the turbo codes by 0,05, …, 0,25 dB in comparison with a chaotic interleaver without modification at the same value of the bit error probability. When increasing the length of the modified chaotic interleaver with the Duffing equation and applying distance spectrum of the code the increasing the energy efficiency of the turbo code slows down compared to the chaotic interleaver without modification.
The application scope of the modified chaotic interleaving with the Duffing equation and with examining the code's distance spectrum of turbo codes is the infocommunication channels for mobile, wired, and satellite communications
Evaluating the impact of dispersed particles in the water of a power plant recirculating cooling system on the discharge of suspended solids into a natural water body
Authors: Kuznietsov Pavlo , Biedunkova Olha 
Published: December 2023

The object of this study is the processes of formation and changes of dispersed particles in fresh, make-up, cooling, and return water in open recirculating cooling systems (RCS) with an assessment of the influence of suspended substances in discharge waters on the aquatic ecosystem. The study was carried out on the example of the Rivne Nuclear Power Plant (RNPP) and the Styr River. Dispersed particles (DPs) pose technological obstacles in the RCS of power plants, and their content in discharge waters determines the ecological quality of water bodies. This paper describes the results of studying the formation and changes of DP in raw, make-up, cooling, and return waters of RNPP RCS with an assessment of the impact of suspended substances in discharge waters on the aquatic ecosystem of the Styr River. It was found that the formed dispersed particles after water treatment by liming contain DP consisting of calcium carbonate and have a size of 10–30 μm. As a result of agglomeration of DP in RCS, they aggregate to 120–150 μm, and due to low sedimentation resistance (sedimentation time 0.97 h), they settle in RCS. As a result of the deposition of DP in RCS, their significant decrease in return water (min–max=7.31–16.12 mg/dm3) is observed, despite the increase in their content in make-up water after water treatment (min–max=10.22–49.46 mg/dm3). According to the ecological classification, according to the content of suspended substances, the water of the Styr River in the zone of influence of RNPP discharges belongs to the II class, category 2, which characterizes the quality of the water as "very good" in terms of its state, and "clean" in terms of its degree of purity. It was concluded that the content of suspended solids does not exceed the established maximum permissible concentration (25 mg/dm3), the increase in the concentration of suspended solids does not exceed the established ecological standard of 0.25 mg/dm3 and does not have a negative impact on surface water. The results of the research could be used for other power plants equipped with an open RCS
APPROXIMATION OF DIFFERENTIATION OPERATORS BY BOUNDED LINEAR OPERATORS IN LEBESGUE SPACES ON THE AXIS AND RELATED PROBLEMS IN THE SPACES OF \((p,q)\)-MULTIPLIERS AND THEIR PREDUAL SPACES
Authors: Arestov Vitalii V. 
Published: December 2023

We consider a variant \(E_{n,k}(N;r,r;p,p)\) of the four-parameter Stechkin problem \(E_{n,k}(N;r,s;p,q)\) on the best approximation of differentiation operators of order \(k\) on the class of \(n\) times differentiable functions \((0<k<n)\) in Lebesgue spaces on the real axis. We discuss the state of research in this problem and related problems in the spaces of multipliers of Lebesgue spaces and their predual spaces. We give two-sided estimates for \(E_{n,k}(N;r,r;p,p)\). The paper is based on the author's talk at the S.B. Stechkin's International Workshop-Conference on Function Theory (Kyshtym, Chelyabinsk region, August 1–10, 2023).
CONVEXITY OF REACHABLE SETS OF QUASILINEAR SYSTEMS
Authors: Osipov Ivan 
Published: December 2023

This paper investigates convexity of reachable sets for quasilinear systems under integral quadratic constraints. Drawing inspiration from B.T. Polyak's work on small Hilbert ball image under nonlinear mappings, the study extends the analysis to scenarios where a small nonlinearity exists on the system's right-hand side. At zero value of a small parameter, the quasilinear system turns into a linear system and its reachable set is convex. The investigation reveals that to maintain convexity of reachable sets of these systems, the nonlinear mapping's derivative must be Lipschitz continuous. The proof methodology follows a Polyak's scheme. The paper's structure encompasses problem formulation, exploration of parameter linear mapping and image transformation, application to quasilinear control systems, and concludes with illustrative examples.
ANALISIS KRITIKALITAS PROSES HYDRIDING SERTA PENYIMPANAN PADUAN UMo DAN UZr SEBAGAI KANDIDAT BAHAN BAKAR REAKTOR RISET MENGGUNAKAN OPENMC
Authors: Octadamailah Saga , Isnaini Anissa , Sigit Rohmad 
Published: December 2023

Penelitian bahan bakar reaktor riset saat ini mengarah pada peningkatan densitas uranium untuk menghasilkan fluks neutron yang lebih tinggi dalam rangka peningkatan produksi radioisotop serta efisiensi dan akurasi pada berbagai pengujian material. Pengembangan bahan bakar nuklir di Indonesia saat ini dalam rangka peningkatan densitas uranium salah satunya adalah pengembangan UMo dan UZr. Salah satu proses pembuatan serbuk UMo dan UZr adalah melalui proses hydriding-dehydriding yang melibatkan uranium diperkaya, serta gas hidrogen bertekanan tinggi. Kombinasi tersebut menghadirkan potensi kecelakaan kritikalitas yang harus diperhitungkan sebelumnya. Perhitungan kritikalitas dilakukan menggunakan perangkat lunak OpenMC, yaitu sebuah simulasi fisika nuklir yang menggunakan metode Monte Carlo. Dalam simulasi ini digunakan dua jenis paduan, yaitu U7Mo dan U6Zr. Simulasi dilakukan dengan menggunakan 10.000 partikel dan 44 batch sebagai pengaturan parameter. Dari hasil simulasi diperoleh nilai keff untuk paduan U7Mo adalah sebesar 0,0297, sedangkan untuk U6Zr adalah sebesar 0,0314. Kedua nilai tersebut jauh di bawah nilai kritis yang mengindikasikan bahwa potensi kecelakaan kritikalitas sangat rendah. Pada simulasi penyimpanan hasil proses hidriding, terdapat potensi terjadi kecelakaan kritikalitas jika botol penyimpanan diletakkan dalam posisi berdekatan tanpa diberi jarak. Untuk mengatasi risiko tersebut, setiap botol harus diberi jarak aman dan perlu adanya batasan massa uranium per satuan volume yang diijinkan.Kata kunci: U7Mo, U6Zr, kritikalitas, hydriding, monte carlo, openMC.
Time-Dependent Probabilistic Seismic Hazard Analysis for Seismic Sequences Based on Hybrid Renewal Process Models
Authors: Xu Ming-Yang , Lu Da-Gang , Zhou Wei 
Published: December 2023

ABSTRACT
Probabilistic seismic hazard analysis (PSHA) is a methodology with a long history and has been widely implemented. However, in the conventional PSHA and sequence-based probabilistic seismic hazard analysis (SPSHA) approaches, the occurrence of mainshocks is modeled as the homogeneous Poisson process, which is unsuitable for large earthquakes. To account for the stationary occurrence of small-to-moderate (STM) mainshocks and the nonstationary behavior of large mainshocks, we propose a time-dependent sequence-based probabilistic seismic hazard analysis (TD-SPSHA) approach by combining the time-dependent mainshock probabilistic seismic hazard analysis (TD-PSHA) and aftershock probabilistic seismic hazard analysis, consisting of four components: (1) STM mainshocks, (2) aftershocks associated with STM mainshocks, (3) large mainshocks, and (4) aftershocks associated with large mainshocks. The approach incorporates an exponential-magnitude, exponential-time model for STM mainshocks, and a renewal-time, characteristic-magnitude model for large mainshocks to assess the time-dependent hazard for mainshocks. Then nonhomogeneous Poisson process is used to model the occurrence of associated aftershocks, in which the aftershock sequences can be modeled using the Reasenberg and Jones (RJ) model or the epidemic-type aftershock sequence (ETAS) model. To demonstrate the proposed TD-SPSHA approach, a representative site of the San Andreas fault is selected as a benchmark case, for which five time-dependent recurrence models, including normal, lognormal, gamma, Weibull, and Brownian passage time (BPT) distributions, are chosen to determine the occurrence of large mainshocks. Then sensitivity tests are presented to show the effects on TD-SPSHA, including (1) time-dependent recurrence models, (2) mainshock magnitude, (3) rupture distance, (4) aftershock duration, (5) escaped time since the last event, and (6) future time interval. Furthermore, the bimodal hybrid renewal model is utilized by TD-SPSHA for another case site. The comparison results illustrate that the sequence hazard analysis approach ignoring time-varying properties of large earthquakes for long periods and the effects of associated aftershocks will result in a significantly underestimated hazard. The TD-SPSHA-based hazard curves using the ETAS model are larger than those of the RJ model. The proposed TD-SPSHA approach may be of significant interest to the field of earthquake engineering, particularly in the context of structural design or seismic risk analysis for the long term.
Capturing Directivity in Probabilistic Seismic Hazard Analysis for New Zealand: Challenges, Implications, and a Machine Learning Approach for Implementation
Authors: Weatherill Graeme , Lilienkamp Henning 
Published: December 2023

ABSTRACT
The proximity of fast-slipping crustal faults to urban areas may result in pulse-like ground motions from rupture directivity, which can contribute to increased levels of damage even for engineered structures. Systematic modeling of directivity within probabilistic seismic hazard analysis (PSHA) remains challenging to implement at the regional scale, despite the availability of directivity models in the literature. In the process of developing the 2022 National Seismic Hazard Model for New Zealand (2022 NSHM), we explored the feasibility and impact of modeling directivity for PSHA at a national scale using the previous generation 2010 NSHM. The results of this analysis allowed us to quantify the impact of directivity on the resulting seismic hazard maps for New Zealand and gain insights into the factors that contribute to the expected increases (and decreases) in ground-motion level. For the 2022 NSHM, the earthquake rupture forecast (ERF) seismogenic source models introduced enormous challenges for directivity modeling due to the abundance of large multisegment or multifault ruptures with complex geometries. To overcome these challenges, we applied a machine learning-based strategy to “overfit” an artificial neural network to capture the distributions of directivity amplification and its variability for each unique rupture in the earthquake rupture forecast. This produces a compact representation of the spatial fields of amplification that are computationally efficient to generate within a complete PSHA calculation for the 2022 NSHM. This flexible and reproducible framework facilitates the implementation of directivity in PSHA at a regional scale for complex ERF source models and opens up the possibility of more complex characterization of epistemic uncertainties for near-source ground motion in practice.
Rapid Earthquake Rupture Characterization for New Zealand Using the FinDer Algorithm
Authors: Andrews Jen , Behr Yannik , Böse Maren , Massin Frédérick , Kaiser Anna , Fry Bill 
Published: December 2023

ABSTRACT
Immediately after a significant earthquake, rapid scientific information is critical for response decision-making and estimating secondary hazards, and is a key component of advisories and public communication. Characterization of the fault rupture extent is especially valuable because it strongly controls ground-motion estimates, or tsunami forecasts in offshore settings. The Finite-fault rupture Detector (FinDer) is designed to rapidly estimate location, extent, and orientation of earthquake fault rupture by matching spatial distributions of high-frequency seismic amplitudes with precomputed templates. Under a large public initiative to better prepare for and respond to natural disasters, FinDer is being implemented in New Zealand for rapid source characterization. Here, we report on implementation and performance, including offline and real-time testing using configurations modified for the New Zealand setting. Systematic testing is used to inform guidelines for real-time usage and interpretation. Analysis of rupture parameter recovery when using national network GeoNet stations demonstrates that for moderate (M 6+) onshore earthquakes FinDer can resolve magnitude and location well, and the rupture strike is also well determined for large (M 7+) onshore earthquakes. For near-offshore earthquakes (within 100 km), FinDer can provide reasonable magnitude estimates but cannot determine the location or strike. Real-time testing shows reliable detection for onshore earthquakes of M 4.5+, with reasonable location and magnitude accuracy. First detection times range between 7 and 65 s of earthquake origin, and stable solutions even for large (M 7+) magnitude events are delivered within 2 min. Although the GeoNet seismic network is not optimized for earthquake early warning, this provides a first exploration of network-based capability for New Zealand. Offline testing of significant M 7+ historic earthquakes demonstrates that FinDer’s rupture solutions can be used to improve rapid shaking predictions, and may be used to infer additional directivity and tsunami hazard even for complex events like the 2016 M 7.8 Kaikōura earthquake.
A SYSTEMATIC APPROACH IN THE METHODOLOGY OF TEACHING CLASSICAL DANCE IN THE VOCATIONAL TRAINING OF CHOREOGRAPHERS
Authors: Теребиленко Е.Е. , Штрекер Н.Ю. 
Published: December 2023

В современном образовании понятие методики преподавания классического танца предполагает широкий спектр компетенций и является достаточно новым объектом исследования в области педагогического знания в системе подготовки студентов-хореографов. В статье представлен анализ методики преподавания классического танца в процессе обучения студентов хореографических направлений подготовки в высших образовательных учреждениях. Основная методологическая цель исследования – исследование современной практики хореографического образования и обучения классическому танцу как системы. Основные задачи исследования заключаются в том, чтобы изучить существующие методики обучения классическому танцу и доказать необходимость применения именно системного подхода. В ходе исследования были использованы следующие методы: теоретические (анализ, синтез, обобщение) и практические (наблюдение, сравнение).
The concept of teaching methods of classical dance in the modern education involves a wide range of competencies and is a new object of research in the field of pedagogical knowledge in the system of training choreographers. The article presents an analysis of the methodology of teaching classical dance in the process of teaching students of choreographic directions in higher education institutions. The main methodological goal of the research is to study the modern practice of choreographic education and teaching classical dance as a system. The main objectives of the research are to study the existing methods of teaching classical dance and to prove the need for a systematic approach. In the course of the research, the authors used both theoretical methods such as analysis, synthesis, generalization and practical methods such as observation and comparison.
Comparative observational study between Atorvastatin and Rosuvastatin based on HbA1c levels of patients diagnosed with acute coronary syndrome and heart failure
Authors: M. Ramya , Ramaiah Balakeshwa , G. K. Priya 
Published: December 2023

Background: Our study aims to compare HbA1c levels in hospitalized acute coronary syndrome and heart failure patients treated with atorvastatin versus rosuvastatin
Methods: This is a retrospective, prospective observational study in which the study population includes ACS and HF Hospitalized patients, the study subjects are divided based on patients prescribed with Atorvastatin and Rosuvastatin based on the medication chart, and those patients' previous history of statin use is collected from history chart, patient case notes, doctors notes, laboratory data is collected and documented in data collection form, lab data includes HbA1c, finally compared Atorvastatin and Rosuvastatin using excel and JASP descriptive analysis.
Results: Overall, we collected data for 132 cases, of which 55% are males and 45% females, 59.10% are above 61 years of age, 39.39% are diagnosed with ACS and 23.48% are diagnosed with HF, among 67 patients who are using Atorvastatin, there was a significant mean decrease in HbA1c% from 8.359% to 7.901%, and among 65 Rosuvastatin users there was an increase in mean HbA1c% from 8.386% to 8.389%. Additionally for non-diabetic individuals, there was an increase in Hba1c% from 6.339% to 6.387%.
Conclusions: We concluded that Atorvastatin is a more effective statin than Rosuvastatin which will reduce the risk of new-onset Diabetes Mellitus in non- diabetic individuals and reduce the risk of increasing complications of diabetes mellitus in patients who are Diabetic.
Analiza sytuacji mniejszości homoseksualnej w Korei Południowej w XXI wieku na przykładzie programu Merry Queer
Authors: Burski Jakub 
Published: December 2023

Celem artykułu jest zbadanie zmieniających się postaw społecznych względem mniejszości homoseksualnej w Korei Południowej w XXI wieku. Przyjęto hipotezę, iż wizerunek osób homoseksualnych oraz par jednopłciowych w społeczeństwie południowokoreańskim uległ ociepleniu na przestrzeni ostatnich lat, a świadczyć może o tym wzrost zainteresowania problemami powszechnymi dla mniejszości oraz powstawanie programów oraz seriali dotykających problematyki par jednopłciowych. Artykuł ma na celu odpowiedzieć na pytania badawcze: Jakie postawy rodziców względem homoseksualnych dzieci są ukazywane w mediach? Jakie poglądy względem par jednopłciowych dominują w południowokoreańskim społeczeństwie? Czy na przestrzeni ostatnich lat odnotowano w telewizji wzrost popularności lub liczby produkcji zawierających wątek homoseksualny? Czego dotyczą główne problemy, z którymi borykają się osoby homoseksualne w Republice Korei Południowej? W analizie przyjęto metodę jakościową poprzez analizę zachowań uczestników i komentarzy w odniesieniu do programu oraz metodę ilościową jako analizę statystyk. Podstawą analizy jest program „Merry Queer”, zwłaszcza problemy dotykające osób homoseksualnych w gronie rodziny jak i samym społeczeństwie koreańskim, a także jego odbiór społeczny oraz badania opinii publicznej dotyczące mniejszości homoseksualnej w Korei Południowej w okresie lat 2001-2021, przy czym szczególne znaczenie mają tu ankiety Koreańskiego Instytutu Badawczego Gallupa oraz Koreańskiego Serwisu Informacji Statystycznych KOSIS. Badaniu poddany został również rozwój i zwiększenie liczby produkcji z wątkiem homoseksualnym. Ramy czasowe pracy obejmują okres od początku XXI wieku do roku 2022, ponieważ w czasie pisania artykułu były to najświeższe dostępne dane.
Association between retinal nerve fiber layer thickness and psychiatric disorders: a Mendelian randomization study
Authors: Qin Fuyi , Cao Xiang , Zhao xinling , Guo zeyi , LIU yilin , Wen jia , Long qing , Teng zhaowei , Zeng yong 
Published: December 2023

Abstract

Background:
Retinal nerve fiber layer thickness, as a new visual indicator that may help diagnose mental disorders, is gaining attention from researchers. However, the causal relationship between retinal nerve fiber layer thickness and mental disorders is still to be effectively proved.
Methods:
A bidirectional Two-sample Mendelian randomization analysis was utilized to analyse aggregated data from large-scale genome-wide association studies, we selected genetic loci for retinal nerve fiber layer thickness in independent retinal abnormalities and three prevalent psychiatric disorders (schizophrenia, depression, bipolar disorder) as instrumental variables. The Two-sample Mendelian randomization analysis was mainly performed by inverse variance weighting and weighted median method. The Cochran Q test and leave-one-out sensitivity were used to ensure the robustness of the results. The Mendelian random polymorphism residuals and outliers were used to detect single nucleotide polymorphism outliers, and MR-Egger intercept test was used to test single nucleotide polymorphism horizontal pleiotropy.
Results:
IVW showed that retinal nerve fiber layer thickness was positively associated with schizophrenia (OR=1.057, 95%CI: 1.000-1.117, P<0.05), in the study of bipolar disorder, MR analysis also suggested a positive causal relationship between retinal nerve fiber layer thickness and bipolar disorder (OR=1.025, 95%CI: 1.005-1.046, P<0.05), which indicated possible causal relationships between retinal nerve fiber layer thickness and these two diseases. Depression (OR=1.000143, 95%CI: 0.9992631-1.001024, P=0.74) indicated no significant causal association. No reverse causal effects of psychiatric disorders on retinal nerve fiber layer thickness were found.
Conclusions:
A statistically significant causal relationship between retinal nerve fiber layer thickness and schizophrenia and bipolar disorder has been supported by genetic means, indicating that retinal nerve fiber layer thickness can be used as a potentially effective indicator for the prediction and diagnosis of these two diseases.