bluuebunny/crossref_metadata_2025 huggingface dataset:
Shocks Power Tidal Disruption Events
Authors: Ryu Taeho , Krolik Julian , Piran Tsvi , Noble Scott C. , Avara Mark
Published: October 2023

Accretion of debris seems to be the natural mechanism to power the radiation emitted during a tidal disruption event (TDE), in which a supermassive black hole tears apart a star. However, this requires the prompt formation of a compact accretion disk. Here, using a fully relativistic global simulation for the long-term evolution of debris in a TDE with realistic initial conditions, we show that at most a tiny fraction of the bound mass enters such a disk on the timescale of observed flares. To “circularize” most of the bound mass entails an increase in the binding energy of that mass by a factor of ∼30; we find at most an order-unity change. Our simulation suggests it would take a timescale comparable to a few tens of the characteristic mass fallback time to dissipate enough energy for “circularization.” Instead, the bound debris forms an extended eccentric accretion flow with eccentricity ≃0.4–0.5 by ∼two fallback times. Although the energy dissipated in shocks in this large-scale flow is much smaller than the “circularization” energy, it matches the observed radiated energy very well. Nonetheless, the impact of shocks is not strong enough to unbind initially bound debris into an outflow.
Constraints on the Dust Size Distributions in the HD 163296 Disk from the Difference of the Apparent Dust Ring Widths between Two ALMA Bands
Authors: Doi 土井 Kiyoaki 聖明 , Kataoka 片岡 Akimasa 章雅
Published: October 2023

The dust size in protoplanetary disks is a crucial parameter for understanding planet formation, while the observational constraints on dust size distribution have large uncertainties. In this study, we present a new method to constrain the dust size distribution from the dust spatial distribution, utilizing the fact that larger dust grains are more spatially localized. We analyze Atacama Large Millimeter/submillimeter Array Band 6 (1.25 mm) and Band 4 (2.14 mm) high-resolution images and constrain the dust size distribution in the two rings of the HD 163296 disk. We find that the outer ring at 100 au appears narrower at longer wavelengths, while the inner ring at 67 au appears to have similar widths across the two wavelengths. We model dust rings trapped at gas pressure maxima, where the dust grains follow a power-law size distribution, and the dust grains of a specific size follow a Gaussian spatial distribution, with the width depending on the grain size. By comparing the observations with the models, we constrain the maximum dust size

a

max

and the exponent of the dust size distribution p. We constrain

0.9

mm
<

a

max

<
5

mm

and p < 3.3 in the inner ring, and

a

max

>
3

×

10

1

mm

and 3.4 < p < 3.7 in the outer ring. The larger maximum dust size in the outer ring implies a spatial dependency in dust growth, potentially influencing the formation location of the planetesimals. We further discuss the turbulence strength α derived from the constrained dust spatial distribution, assuming equilibrium between turbulent diffusion and the accumulation of dust grains.
Quasar Factor Analysis—An Unsupervised and Probabilistic Quasar Continuum Prediction Algorithm with Latent Factor Analysis
Authors: Sun 孙 Zechang 泽昌 , Ting 丁 Yuan-Sen 源森 , Cai 蔡 Zheng 峥
Published: October 2023

Since their first discovery, quasars have been essential probes of the distant Universe. However, due to our limited knowledge of its nature, predicting the intrinsic quasar continua has bottlenecked their usage. Existing methods of quasar continuum recovery often rely on a limited number of high-quality quasar spectra, which might not capture the full diversity of the quasar population. In this study, we propose an unsupervised probabilistic model, quasar factor analysis (QFA), which combines factor analysis with physical priors of the intergalactic medium to overcome these limitations. QFA captures the posterior distribution of quasar continua through generatively modeling quasar spectra. We demonstrate that QFA can achieve the state-of-the-art performance, ∼2% relative error, for continuum prediction in the Lyα forest region compared to previous methods. We further fit 90,678 2 < z < 3.5, signal-to-noise ratio >2 quasar spectra from Sloan Digital Sky Survey Data Release 16 and found that for ∼30% quasar spectra where the continua were ill-determined with previous methods, QFA yields visually more plausible continua. QFA also attains ≲1% error in the 1D Lyα power spectrum measurements at z ∼ 3 and ∼4% in z ∼ 2.4. In addition, QFA determines latent factors representing more physical motivation than principal component analysis. We investigate the evolution of the latent factors and report no significant redshift or luminosity dependency except for the Baldwin effect. The generative nature of QFA also enables outlier detection robustly; we showed that QFA is effective in selecting outlying quasar spectra, including damped Lyα systems and potential Type II quasar spectra.
Abundances of Heavy Elements in the B8 Mn Star HD 110073
Authors: Monier Richard
Published: October 2023

The synthesis of several spectral intervals in the optical range allows the determination of LTE abundances of strontium, yttrium, zirconium, barium, praseodymium, neodymium, platinum and mercury for this B8 Mn star. Compared to the solar abundances, strontium, yttrium, barium, praseodymium and mercury are found to be overabundant by factors of 2.5, 130, 10, 150 and 60,000. Only upper limits could be determined for zirconium and platinum. The lines of Nd iii are blended with lines of more abundant elements which precludes the determination of the abundance of neodymium. The abundance of manganese, derived from the Mn ii line at 3986.59 Å is about 100 times larger than in the Sun.
At the dawn of megadiversity – Protoitidae, a new family of Chalcidoidea (Hymenoptera) from Lower Cretaceous Lebanese amber
Authors: UImer Jonah M. , Janšta Petr , Azar Dany , Krogmann Lars
Published: October 2023

The earliest representatives of Chalcidoidea are described from Barremian age Early Cretaceous Lebanese amber and classified in Protoitidae Ulmer & Krogmann, fam. nov. (Hymenoptera: Chalcidoidea). Protoitidae exhibits a high morphological diversity of the terminal metasomal tergum which may indicate a broad spectrum of oviposition capabilities and the ability to occupy a diverse range of ecological niches. Protoitidae comprises two genera, Protoita Ulmer & Krogmann, gen. nov., and Cretaxenomerus Nel & Azar, 2005 based on C. jankotejai Nel & Azar, 2005, which is transferred from Scelionidae (Hymenoptera: Platygastroidea) to Protoitidae. Together, 10 new species, all by Ulmer and Krogmann, are described in the two included genera–Protoita bidentata, P. istvani, P. noyesi, P. petersi, Cretaxenomerus brevis, C. curvus, C. deangelis, C. mirari, C. tenuipenna, and C. vitreus. Keys to the genera and species of Protoitidae are provided. In addition, we examine the postulated plesiomorphies and apomorphies within Chalcidoidea with respect to the fossil record, and provide additional hypotheses on their biogeographic origins.
Invasive alien plants in South Asia: Impacts and management
Authors: Bhatta Suneeta , Shrestha Bharat Babu , Pyšek Petr
Published: October 2023

South Asia is home to an immense diversity of flora and fauna, which makes it one of the global biodiversity hotspots. Plant invasions are one of several factors that threaten South-Asian biodiversity. This review lists problematic invasive plant species, analyses their negative impacts, and summarises management methods implemented in South Asia using data obtained from research articles and relevant databases (CABI, GISD, GloNAF). The data was used to evaluate the research trends over time, knowledge of the impacts of invasive plants, and management measures aimed at the invasive species. In total, 392 currently invasive vascular plant species were recorded in South Asia. Of these, 41 species are widely distributed in South Asia, occurring in at least three countries, and 20 species that are listed as invasive in South-Asian countries by the book Invasive Plant Species of the World are considered as the most problematic. For a subset of the most problematic species where such information is available, we present management measures that are in place in individual countries. The number of studies on invasive species in South Asia has been increasing, with more than half (53%) represented by local and regional inventories. Among the countries in South Asia, India has the highest number of invasive (145) and naturalized plant species (471). However, the percentage contribution of invasive and naturalized species to the native flora is the highest in the Maldives Islands. Studies on impacts are limited to those on native plants and agriculture; there is a lack of research on impacts on ecosystems and hydrology, as well as on economic costs and human health. Moreover, impacts have been quantified for very few species. Currently, the management of invasive plants is mostly done by physical or mechanical methods; research into opportunities for biological control is inadequate. Our review highlights the urgent need to quantify the impacts of all prevalent and problematic invasive species in South Asia as a crucial step in allocating resources for their management and addressing the knowledge gap in this region.
Effects of evaluated nuclear data libraries on the calculation results for fuel burnup with minor actinides in a VVER reactor
Authors: Karpovich Gleb W. , Kazansky Yury A. , Bakhantsov Kirill A. , Isanov Kirill A. , Kushnir Nikita O.
Published: October 2023

The paper deals with assessing the effects of the ENDF/B-VI.8, ENDF/B-VII.0, JEFF 3.1 and JEFF 3.1.1 nuclear data libraries on the results of calculating a number of functionals for a system based on a VVER reactor with fuel with a large fraction of minor actinides (up to 10%). Key estimates have been obtained for the errors introduced by libraries in calculations of systems with minor actinides (MA) based on a VVER-1200 reactor:

– for reactivity, σρ = 0.3 βeff;

– for isotopic compositions with minor actinides, ≤ 5% (the error for each particular isotope is different);

– for the total mass of accumulated MAs, εm = 0.8%.

Conclusions have been made with respect to the need for the further refinement of the library MA data proceeding from the nature of the calculation tasks that dictate the requirements for the accuracy of nuclear constants. It has been shown that systems based on VVER-1000/1200/1300 reactors with MAs need to be calculated using several libraries of evaluated nuclear data created at different organizations and based on the largest possible number of non-recurrent sets of experimental data.
Identité et non-binarité
Authors: Douville Olivier
Published: October 2023

Aujourd’hui, les métamorphose d’Éros amènent à repenser la thèse qui fait du binarisme sexuel la clef de voûte de l’ordre symbolique. Le corpus psychanalytique est secoué et le sont, plus encore, les pratiques. Comment maintenir vivantes l’écoute, l’intervention analytique et son rapport à ce qui remue dans les champs de la culture ? En quoi le dialogue avec l’anthropologie a-t-il ici une pertinence ?
De la non-conformité à la diversité de genre
Authors: Foigel Maya , Mezan Renato
Published: October 2023

Les réflexions présentées dans cet article sont le fruit de plus de dix ans de travail clinique avec des adolescent·e·s brésilien·ne·s aux genres divers, dans des services ambulatoires publics et en libéral. Accompagner ces adolescent·e·s invite le psychanalyste à reconsidérer les fondements de la théorie qui l’inspire. À cet égard, le processus de dépathologisation ainsi que l’attention portée aux récits singuliers des adolescent·e·s transgenres enrichiront indéniablement les débats.
Adolescences dissidentes
Authors: Blestcher Facundo , de la Vega Ruth
Published: October 2023

Les actuelles transformations des subjectivités sexuées confrontent la théorie et la clinique psychanalytiques à l’insuffisance de certaines catégories canoniques pour comprendre les dissidences de la sexualité. Les transidentités, les transsexualités, les travestismes, les transgenres, les subjectivités non-binaires et fluides dans les adolescences contemporaines, génèrent une crise dans les récits patriarcaux et interpellent les imaginaires cis-hétéro-normatifs de la psychanalyse.
Sign-changing solutions for the Schrödinger-Poisson system with concave-convex nonlinearities in $ \mathbb{R}^{3} $
Authors: Yang Chen , Tang Chun-Lei
Published: October 2023

In this paper, we consider the following Schrödinger-Poisson system

   \begin{document}$ \begin{equation*} \qquad \left\{ \begin{array}{ll} -\Delta u+V(x)u+\phi u = |u|^{p-2}u+ \lambda K(x)|u|^{q-2}u\ \ \ &\ \rm in\; \mathbb{R}^{3}, \\ -\Delta \phi = u^2 \ \ \ &\ \rm in\; \mathbb{R}^{3}.\ \end{array} \right. \end{equation*} $\end{document}

Under the weakly coercive assumption on $ V $ and an appropriate condition on $ K $, we investigate the cases when the nonlinearities are of concave-convex type, that is, $ 1 < q < 2 $ and $ 4 < p < 6 $. By constructing a nonempty closed subset of the sign-changing Nehari manifold, we establish the existence of least energy sign-changing solutions provided that $ \lambda\in(-\infty, \lambda_*) $, where $ \lambda_* > 0 $ is a constant.
The inverses of tails of the generalized Riemann zeta function within the range of integers
Authors: Pan Zhenjiang , Wu Zhengang
Published: October 2023

In recent years, many mathematicians researched infinite reciprocal sums of various sequences and evaluated their value by the asymptotic formulas. We study the asymptotic formulas of the infinite reciprocal sums formed as $ \left(\sum^{\infty}_{k = n} \frac{1}{k^r(k+t)^s} \right)^{-1} $ for $ r, s, t \in \mathbb{N^+} $, where the asymptotic formulas are polynomials.
Novel non-fragile extended dissipative synchronization of T-S fuzzy complex dynamical networks with interval hybrid coupling delays
Authors: Hongsri Arthit , Weera Wajaree , Botmart Thongchai , Junsawang Prem
Published: October 2023

This paper presents the first investigation of extended dissipative synchronization in a specific type of Takagi-Sugeno (T-S) fuzzy complex dynamical networks with interval hybrid coupling delays. First, the decoupling method is employed to reorganize the multiple communication dynamical system, which comprises discrete-time, partial and distributed coupling delays. Second, the non-fragile control, which allows for uncertainty management within predefined norm bounds, has been applied to networks. Moreover, it becomes possible to derive a less conservative condition by utilizing multiple integral Lyapunov functionals, a decoupling strategy, Jensen's inequality, Wirtinger's inequality, and mathematical inequality techniques. This condition ensures that the T-S fuzzy complex dynamical networks, with interval hybrid coupling delays, can attain asymptotic synchronization with the assistance of a non-fragile feedback controller. Additionally, we extended this system to the extended dissipativity analysis, including passivity, $ L_2-L_\infty, H_{\infty} $ and dissipativity performance in a unified formulation. A set of strict linear matrix inequalities (LMIs) conditions is a sufficient criterion. Finally, two simulation examples are proposed to verify the merit of the obtained results.
“And you shall know the truth, and the truth shall make you free”: environmental-climate conspiracy theories and populism at the beginning of the Bolsonaro administration (2018-2020)
Authors: Ramalho von Behr Klaus
Published: October 2023

The main argument presented in this paper is
that the environmental-climate conspiracy theories propagated at the
beginning of the Bolsonaro administration helped to foster a populist
ideology – that is, the idea that there is a moral struggle between
the 'good people' against 'corrupt elites' and that the populist
leader is the only legitimate representative of this people because he
represents their moral values. To support this argument, we conducted
a qualitative content analysis of 36 conspiratorial speeches around
the environmental-climate issue delivered by five actors from the
Bolsonaro administration top positions (Jair Bolsonaro, Eduardo
Bolsonaro, Ernesto Araújo, Filipe Martins and Olavo de Carvalho)
between 2018 and 2020. From this qualitative analysis, we evidenced a
conspiratorial structure as follows: global, intellectual,
technocratic, and left-wing elites seek to instrumentalize the
environmental-climate agenda – in particular by ideological
indoctrination and alarmism – to justify widespread control over the
nations sovereignties and the individuals freedoms. It was found that
unmasking and resisting environmentalism were the two main moral
messages that this conspiratorial structure emanates. In the face of
this moral struggle between truth and freedom, in which climate change
and the Amazon are embedded, Bolsonaro is presented as a patriotic
leader who defends sovereignty, development, and the interests of the
people and the nation.
Rainfall intensity model with spatialization of intensity-duration-frequency curve parameters - A case study for the state of Maranhão, Brazil
Authors: Coelho Mariana Medeiros , Figueiredo Nélio Moura de , Coelho Maria Teresinha de Medeiros , Campos Filho Lúcio Carlos Pinheiro
Published: October 2023

The characterization of intense rainfall in engineering projects is fundamental, mainly regarding the estimate of design flows necessary for designing hydraulic works. Intense rainfall events are commonly measured by Equations and curves that relate their intensity, duration, and frequency. Such relations, known as IDF, enable the hydrological characterization of a given region. This article presents a methodological design and results from both determination and spatialization of IDF curve parameters for the state of Maranhão. Historical series of maximum daily rainfalls obtained from National Water and Sanitation Agency (ANA) were used in 126 rainfall gauge stations and the Gumbel probability distribution estimated the maximum daily rainfall for 5, 10, 15, 25, 50, and 100 return periods. The Isozonal Method obtained the IDF correlations of intense rainfall events for 0,1. 1, and 24 h durations, and their performance were conducted by Nash-Sutcliffe R2 coefficient and Root Mean Square Relative Error (RMSE). “K, a, b, and c” parameters of intense rainfall equations were determined by optimization and convergence processes and their spatialization was carried out by interpolation by Inverse Distance Weighted (IDW), which enabled to determine the values of each parameter in regions without physical measurements of rainfall. Similarly, rainfall intensity was spatialized for the entire state. According to the results, the rainfall distribution in the state of Maranhão shows a variation in the indexes of precipitation, with the highest values found in areas located in central-southern, southwestern, and southeastern regions.
ChatGPT and large language models: Impact on the integrity of academic publishing
Authors: Tennakoon Varuni
Published: October 2023

No abstract available
Ichnology and sedimentological aspects of the Floriano Formation (Miocene of the Resende Basin), southeast of Brazil
Authors: Motta Marianna da Cruz , Araújo-Júnior Hermínio Ismael de , Menezes Mauricius Nascimento , Trifilio Lucas Henrique Medeiros da Silva
Published: October 2023

Many previous studies identified depositional systems for the Resende Basin using sedimentological and petrographic techniques. However, the lack of ichnological research leaves a gap in our understanding of paleoenvironment and paleoecology of this basin. Therefore, this study reports the first occurrence of trace fossils in the Floriano Formation (Miocene) and suggests more refined paleoenvironmental interpretations for this unit. We only observed ichnofossils in an outcrop on the RJ-161 road in Resende Municipality, Rio de Janeiro State. The deposit represents a floodplain overlayed by a crevasse splay, both sedimented in a meandering fluvial context. Trace fossils of terraphilic organisms – represented by Taenidium isp., Planolites isp. and Arenicolites isp. – were found in the fine-grained sediments of the outcrop. This ichnocoenosis is composed of feeding (fodinichnia), locomotion (repichnia) and/or habitation (domichinia) structures produced by worm-like invertebrates. The ichnotaxonomic assemblage consists of the first record of Scoyenia ichnofacies for a typical meandering fluvial system in Brazil. Keywords: continental ichnology, sedimentology, ichnofacies, paleoenvironment.
Estimated plasma volume status can help identify patients with sepsis at risk of death within 30 days in the emergency department
Authors: Turcato Gianni , Zaboli Arian , Sibilio Serena , Mian Michael , Brigo Francesco
Published: October 2023

For patients with sepsis in the Emergency Department (ED), early risk stratification is important to improve prognosis. The study aimed to evaluate the predictive role of estimated plasma volume (ePVS) on admission to the ED. All sepsis patients who were admitted to our ED in 2021, were included in this prospective study. Multivariate models adjusted for patients' clinical characteristics were used to assess the contribution of ePVS to the independent prediction of death at 30 days. A total of 455 septic patients were enrolled and 16.9% of patients died. Patients who survived to 30 days had a mean ePVS of 5.19, while those who died at 30 days had a value of 5.74 (p=0.004). ePVS was an independent risk factor for 30-day mortality with an adjusted OR of 1.211 (95% CI 1.004–1.460, p=0.045). The AUROC of ePVS was 0.619 (95% CI 0.545–0.689). Decision tree analysis showed a predictive role for ePVS in less severe patients. In septic patients, ePVS is an independent predictor of 30-day mortality and may improve risk prediction in less severe patients.
Athletic Training Student Core Competency Professional Behavior Implementation Between Immersive and Non-immersive Clinical Experiences: A Report From the Association for Athletic Training Education (AATE) Research Network
Authors: Jones Bailey Christine , Cavallario Julie , Van Lunen Bonnie L. , Walker Stacy E. , Bay Curt , Bacon Cailee E. Welch
Published: October 2023

Context

The Commission on Accreditation of Athletic Training Education requires athletic training programs to emphasize the use of professional behaviors that are associated with 6 core competencies, 5 of which were measured in this study: patient-centered care, interprofessional education and collaborative practice (IPECP), evidence-based practice (EBP), health information technology (HIT), and quality improvement (QI). The purpose of this study was to examine the association between clinical experience type and student implementation of behaviors associated with the core competencies.

Design

Multisite, panel design.

Setting

Twelve professional athletic training programs (7 graduate, 5 undergraduate).

Patients or Other Participants

A total of 338 athletic training students logged patient encounters for 1 academic year in the E*Value system.

Main Outcome Measure(s)

Students reported clinical experience type (immersive versus nonimmersive) and implementation of behaviors associated with core competencies. Counts of professional behaviors were calculated, and differences in behavior implementation between immersive (ICEs) and non-immersive (N-ICEs) clinical experiences were assessed using a generalized estimating-equations approach for patient-centered care, IPECP, EBP, HIT, and QI behaviors (P < .05).

Results

Students implemented more behaviors associated with IPECP (P = .002), EBP (P = .002), and HIT (P = .042) during ICEs than N-ICEs. Students implemented the QI behavior more often during N-ICEs than during ICEs (P = .001). Patient-centered care behavior did not differ between clinical experience types.

Conclusions

Immersive clinical experiences facilitate increased implementation of behaviors associated with EBP, IPECP, and HIT, while N-ICEs offered increased opportunities for QI behaviors. Program administrators should consider placement of ICEs and N-ICEs in the curriculum that align with students’ capability to perform core competency behaviors. Preceptors of both ICEs and N-ICEs should be encouraged to provide students with opportunities to implement all core competencies during their clinical experience.
Improving 6G Network Spectrum Efficiency with Non-Cooperative and Cooperative Spectrum Sharing Using NOMA and Massive-MIMO
Authors: Hassan Mohamed , Singh Manwinder , Bilal Khalid , Elsayed Imadeldin
Published: October 2023

There is an expectation that standards for sixth-generation (6G) wireless communication networks in the future would give previously unheard-of speeds for the flow of information as well as spectrum optimization. This will present new issues for 6G networks. Non-orthogonal multiple access (NOMA) is one of the most efficient ways to boost the spectrum efficiency (SE) of a 6G network. The most promising contemporary technologies, such as cognitive radio (CR) and multiple access, can be used to improve SE. When NOMA's network-oriented multi-access capabilities are combined with those of the Cognitive Radio Network (CRN), a new era of efficient communication is expected to dawn. To improve the spectral efficiency (SE) of the NOMA DL power domain (PD), this work presents two distinctive strategies that are used in conjunction with un-cooperative and cooperative CRN (Un-CCRN and CCRN) in the event that one primary user (PU) is unable to receive through the dedicated channel due to interference or noise. Users' distances, power placement coefficients, and transmit powers (TPs) vary across the proposed three network topologies, and over the proposed three network sizes of 128x128, 256x256, and 512x512 Massive Multiple Input Multiple Output (M-MIMO). Performance is analyzed while simultaneously considering channel instability and successive interference cancellation (SIC). The channels of fading are modelled after frequency-dependent Rayleigh fading. MATLAB is used to determine the proposed model's SE. With 128x128, 256x256, and 512x512 M-MIMO integrated into the DL NOMA system, the system's SE performance is improved by 73%, 82%, and 87%, respectively; with the Un-CCRN NOMA model, the improvement is 75%, 83%, and 88%; and with the CCRN-NOMA model, the improvement is 75.8%, 84%, and 88.3%. The SE is significantly improved by employing M-MIMO technology. The acquired expressions agree with the outcomes of the provided Monte Carlo simulations, providing further evidence for the validity of our investigation.
Prediction of Anemia using various Ensemble Learning and Boosting Techniques
Authors: Schweta Nalluri , Pande Sagar Dhanaraj
Published: October 2023

INTRODUCTION: Anemia is a disease of great concern. It is mainly seen in people who are deficient in several vitamins like B12 and those who are deficient in iron. Neglecting the situation and leaving it untreated could lead to severe consequences in the future. Hence it is of great importance to predict Anemia in an individual and treat it in the optimum stage.
OBJECTIVES: In this paper, machine learning was used for the prediction of Anemia.
METHODS: The dataset used for this was formed by combining different datasets from Kaggle. The accuracy of various machine learning techniques was evaluated to find out the best one. Along with the supervised learning algorithms like Random Forest, SVM, Naive Bayes etc., Linear Discriminant Analysis, Quadratic Discriminant Analysis and ensemble learning methods were also performed.
RESULTS: Upon evaluation, among the best performers, the execution time was also taken into consideration to determine which classifier works well. Among all the algorithms used, XGboost worked the best with an optimum execution time.
CONCLUSION: The conclusion is that for the data used in the work, XGboost results as the best model.
Water contamination due to oil spill in Ancon
Authors: Arce-Pizarro Roselly Jasmin , Arce-Pizarro Jeremy Darlin , Liñan-Romero Alejandro Daniel , Marín-Rodriguez William Joel , Andrade-Girón Daniel Cristóbal , Lioo-Jordán Flor de María , Caro-Soto Félix Gil , Calvo-Rivera Irina Patricia
Published: October 2023

The general objective of the research in charge was to analyze the actual state of the area after the water pollution caused by the oil spill in Ancon 2022; in the same way, it showed a quantitative approach of non-experimental design of descriptive transversal type, the scope of the research was descriptive; Similarly, it reached a sample of 50 people affected, a survey was used as a technique and the questionnaire as an instrument, validated under criteria which was based on 20 questions for the variable of water pollution through the Likert scale, for this, a previous sample of 20 people was used for the reliability of Cronbach's Alpha; likewise, the data collected were compared by the Microsoft Excel program and the statistical software Jamovi cloud 2. 3. 26; finally, it was concluded that the consequences of water pollution from the oil spill were very harmful to the marine ecosystem, the environment, the surrounding people and the economy.
Rank-one ECS manifolds of dilational type
Authors: Derdzinski Andrzej , Terek Ivo
Published: October 2023

We study ECS manifolds, that is, pseudo-Riemannian manifolds with parallel Weyl tensor which are neither conformally flat nor locally symmetric. Every ECS manifold has rank 1 or 2, the rank being the dimension of a distinguished null parallel distribution discovered by Olszak, and a rank-one ECS manifold may be called translational or dilational, depending on whether the holonomy group of a natural flat connection in the Olszak distribution is finite or infinite. Some such manifolds are in a natural sense generic, which refers to the algebraic structure of the Weyl tensor. Various examples of compact rank-one ECS manifolds are known: translational ones (both generic and nongeneric) in every dimension

n\ge5

, as well as odd-dimensional nongeneric dilational ones, some of which are locally homogeneous. As we show, generic compact rank-one ECS manifolds must be translational or locally homogeneous, provided that they arise as isometric quotients of a specific class of explicitly constructed “model” manifolds. This result is relevant since the clause starting with “provided that” may be dropped: according to a theorem which we prove in another paper, the models just mentioned include the isometry types of the pseudo-Riemannian universal coverings of all generic compact rank-one ECS manifolds. Consequently, all generic compact rank-one ECS manifolds are translational.
Последнее открытие Колмогорова? (Колмогоров и алгоритмическая статистика)
Authors: Vereshchagin Nikolai Konstantinovich , Semenov Aleksei Lvovich , Shen' Alexander Khanievich
Published: October 2023

Помимо определения сложности описания конечных объектов (ныне называемой колмогоровской сложностью), Колмогоров наметил несколько способов более детального анализа свойств конечных объектов: сложность с ограничением на ресурсы (1965), структурную функцию (1974), а также понятие $(\alpha,\beta)$-стохастичности (1981). Впоследствии выяснилось, что эти понятия по существу эквивалентны (дают одну и ту же кривую в разных координатах).
В этом обзоре мы пытаемся проследить возникновение и развитие этих идей Колмогорова, а также аналогичных идей, независимо предложенных другими авторами.
Диффузионное приближение для одной модели предсказательной игры
Authors: Zhitlukhin Mikhail Valentinovich
Published: October 2023

В работе рассматривается динамическая теоретико-игровая модель, в которой игроки делают ставки на исходы случайных событий или значения случайных векторов. Целью работы является построение диффузионного приближения модели в случае, когда все игроки используют практически оптимальные стратегии. С помощью этого приближения изучается предельная динамика модели.
The Relationship Between Learning Style and Cognitive Performance of Undergraduate Nursing Students of Medical-Surgical Nursing in North-west, Nigeria
Authors: Garko M.A. , Gommaa H.E.M. , Suleiman M.A. , Ogunyewo O.A.
Published: October 2023

Background: Medical-surgical nursing course is a critical component of the undergraduatenursing programme which provides foundations for clinical practice. Cognitive performance isthe foundation for nursing skills. Learning styles can affect the cognitive performances ofstudents in medical-surgical nursing. Aim: This study aimed to assess the relationship betweenlearning style and undergraduate nursing students' cognitive performances in medical surgicalnursing courses in North-west Nigeria. 4 objectives were achieved in the study. Methodology:Survey design was used in this study. The study population comprised 812 undergraduatenursing students from the Departments of Nursing Science of Bayero University, Kano andUsman Danfodio University, Sokoto. A sample size of 233 students was recruited via amultistage sampling technique. A total of 233 students' learning style questionnaires weredistributed to the students. Only 176 questionnaires were retrieved and analysed (75.5%response rate). Two (2) instruments were used for data collection. Data was analysed by usingStatistical Package for the Social Sciences (SPSS) version 23 using descriptive and inferentialstatistics. Results: The result revealed that 57.4% of the students were females with a mean ageof 24.95 years. Visual learning style was mostly used by the students (29.5%). The cognitiveperformance of the students in medical-surgical nursing was very good with a mean score of60.36. There is a significant negative correlation between learning style and students' cognitiveperformances in medical-surgical nursing (p-value < 0.05). There is a significant mediationeffect of students' mode of entry on students' cognitive performance in medical-surgical nursing(p-value < 0.05). Conclusion: The study concluded that learning style is significantly related tocognitive performance. Students’ mode of entry is a significant mediator between learning styleand cognitive performance
Characterization and classification of soil resources of hittinahalli sub-watershed derived from basalt in Northern dry zone of Karnataka
Authors: Patil Parameshgouda Lavanagouda , Kalappanavar Deepa , Geetha G.P. , Patil Ragini , Adarsh G.S. , Dasog Ghulappa S.
Published: October 2023

Eighteen Typical pedons representing upland, midland, and lowland forms in a Hittinahalli subwatershed of Vijayapur district were studied for their morphological characteristics and physicochemical properties. The soils were shallow to very deep (25 to >150 cm), very dark brown to black (Munsell color chart) and moderately well to poorly drained. The soil structure changes from weak, medium sub- angular blocky on the surface to moderate, coarse sub-angular blocky in the subsurface horizons. The soils are moderately alkaline to  strongly alkaline (7.59–9.41), low to high in organic carbon (0.08–0.75 g/kg). The pedons on uplands exhibit the development of an argillic horizon (Bt). The pedons on the midlands and lowlands have cambic horizons (Bw), classified as Verisols and Inceptisols, respectively. The  lowlands (P6, P10, P16, and P18) and midlands (P7, P8, P12, P15, and P17) are classified as fine, mixed, Iso-hyperthermic, and Typic  Haplustalfs.
Evaluation of Aquifer Hydraulic Properties and Vulnerability Indices in Mosogar using Geoelectrical Approach
Authors: Ofomola M.O. , Olawuyi A.K. , Abriku E.O. , Anomohanran O. , Bawallah M.A.
Published: October 2023

Geophysical investigation employing vertical electrical sounding (VES), pumping test and in situ groundwater conductivity measurement were carried out in Mosogar, Delta State in order to determine the aquifer properties and vulnerability indices. The Schlumberger electrode configuration was used for the vertical electrical sounding (VES) survey to acquire electrical resistivity data which were interpreted using the WinResist software, version 1.0 (2004). The results revealed that the lithology is composed mainly of sand with various grades with four to five delineated geoelectric layers. Results of hydraulic conductivity, transmissivity and formation factor of the aquifer were found to vary from 7.9233 to 9.2799 m/day, 45.670 – 235.323 m2 /day and 0.545 – 23.664 respectively. Aquifer vulnerability indices within the study location indicate moderate to extremely high vulnerability as classified by aquifer protective capacity (APC), aquifer vulnerability index (AVI), Geo-electric layer susceptibility index (GLSI) and groundwater confinement, overlying strata and groundwater depth index (GOD) models employed, with values ranging from 0.00766 - 0.038728, -0.5631- 0.3025, 2.25 - 3.00 and 0.4 -0.8 respectively. The results revealed that the groundwater is prone to contamination because of weak protection provided by overlying geologic units. Using the Golden surfer 10 software, maps of geo-hydraulic parameters and vulnerability indices were constructed which characterises the aquifer parameters in the area. This study provides an important tool for sustainable groundwater exploration and management in Mosogar
Preparation and Characterization of Thermoplastic Cassava and Sweet Potato Starches
Authors: Usman N. , Hassan L.G. , Almustapha M.N. , Achor M. , Agwamba E.C.
Published: October 2023

Thermoplastics starches are plastics made from renewable resources like plants that are fully bio-based and biodegradable. The aim of this study was to produce and characterize thermoplastic using starches extracted from cassava and sweet potato. The effect of variable amounts of glycerol used as plasticizer and acetic acid used for hydrolysis of the starch polymer were investigated. The intermolecular interaction between the starch and glycerol was ascertained using FT-IR spectroscopy. The biodegradability test conducted on both cassava thermoplastic starch (TPSc) and potato thermoplastic starch (TPSp) were found to lose 36% and 23% respectively of their initial weights after seven days of soil burial. The result showed that as plasticizer concentration increased from 50 to 80%, there was an increase in both moisture and oil uptake but a decrease in water uptake. However, an increase in acetic acid concentration from 2.5% to 7.5% resulted in a decrease in oil uptake, water uptake and moisture uptake of the thermoplastics. Findings in this study reveal increase in the amount of glycerol plasticizer in both thermoplastics increases moisture contents retention however the observed oil uptake and biodegradability properties suggest the thermoplastic starches especially the potato thermoplastic starch is generally suitable for making eco-friendly thermoplastics.
Hepato-Protective Activities of Ethanol Extracts of African Eggplant and Bitter Leaf in Alloxan Induced Diabetic Rats
Authors: George E.T. , Oyesola O.A. , Taiwo E.O. , Owoye I.I.
Published: October 2023

Diabetes is a metabolic disorder, which affect all system of the body including the liver. This study focused on the effect of the ethanol extract of African eggplant and bitter leaf and their combination on the liver structure, antioxidant enzymes activities and biochemical parameters in the liver of alloxan induced diabetic rats. Twenty-five male wistar rats were grouped into normal control group A, diabetic control group B, 100 mg/kg African eggplant extract treated group C, 100 mg/kg bitter leaf extract treated group D and combination of 100 mg/kg of African eggplant and 100 mg/kg bitter leaf treated group E. The results study showed that group E rats showed significant reduction in the activity of AST, ALP and AST. In the antioxidant enzyme activity, the administered extracts increased the antioxidant enzyme activities and reduced lipid peroxidation, thereby protecting the cells from oxidative stress. The micro- histo-architecture of the liver showed improvement and regenerative changes across the treated groups. The study reveal that combination of the ethanol leaf extract of bitter leaf and African eggplant can manage liver malfunction caused by diabetes.
Association between Socio-Demographics and Clinical Profile with Therapy Options Received by Cervical Cancer Patients in Two Nigerian Tertiary Hospitals
Authors: Samaila A. , Biambo A.A. , Usman N. , Aliyu U.M. , Abdullahi A. , Adibe M. O.
Published: October 2023

This study was conducted to determine the associations between the socio-demographics, clinical profile and therapy options received by cervical cancer (CC) patients in Usmanu Danfodiyo University Teaching Hospital (UDUTH), Sokoto and Ahmadu Bello University Teaching Hospital (ABUTH), Zaria. The study used a prospective longitudinal design with retrieved data for 157 eligible CC patients. Pearson’s correlation was used to test for association between patients’ socio-demographics, clinical characteristics and number of therapy options received while comparisons of proportions were carried out using Pearson’s Chi square. Results show that the mean age of the patients was 50.7±9.0 years and 43.3% of patients earned less than ₦50,000.00 per month. The results also reveal most of the 47.1% of patients presented with clinical stage III. Per Vaginal Bleeding (PVB) was the symptoms recorded for 88.5% of the patients while most patients (49.7%) received Chemotherapy (CT) as the major therapy option. There were significant associations between the level of income, (r=0.412, p<0.001), baseline number of symptoms, (r=0.200, p=0.012), number of symptoms after therapy, (r= -0.584, p<0.001) and the number of therapies received by the patients. Clinical disease-stage, baseline number of symptoms and level of income were found to be associated with the therapy options received by the patients.
Ownership and Health Care Status of Pets in Osun State, Nigeria
Authors: Fasasi K.A. , Rufai M.A. , Surakat O.A. , Adojutelegan J.I.
Published: October 2023

Demographic survey of pets’ ownership and the health status of pets within Osogbo metropolis, Osun State was conducted between April and October, 2020. This was done by preparing a structured demographic survey questionnaire which was randomly administered, retrieved and analyzed using descriptive statistics. Majority of pets owners in the study area fall within 21 - 30 years, representing 43.7% of respondents. Three types of breeds - exotic, crossed and local- were identified. A significant number of respondents indicated pets were kept for sustenance and livelihood probably due to the fact that certain category of pets was crossbred with exotic species for preferred traits. Goat owners represent 52.9% of the surveyed population. Most pets’ owners (67.4%) did not register their pets with State’s Animal Husbandry and Veterinary Services Department. Only 35.4% of pet owners admitted that their pets were ectoparasite infested. About 65.7% of respondents vaccinated their pets, 59.9% treated their pets against helminthic infections while 43.0% admit to regular veterinary clinical check-up. Findings from this survey suggests the likelihood for pets to be registered with relevant authority is low but pet owners are more likely to treat and vaccinate their pets.
Microstructural evaluations of mild steel and HT250 grey cast iron in ethanol environment
Authors: Salawu E. Y. , Shittu K. A. , Afolalu S. A. , Kayode J. F. , Lawal S. L. , Ajayi O. O. , Ongbali S. O.
Published: October 2023

The study focused on the response of mild steel and HT250 grey cast iron in varying ethanol concentration. First, a robust review of both materials’ behaviour under different environment was established using microstructural evolutions. Secondly, 30 × 30 × 10 mm dimension of both materials were employed in the study by immersing them in varying ethanol concentrations of BG-43 %, ESG- 42 %, CG-43 %, SQD- 42 % using distilled water as control. The microstructural behaviour showed that every of the sample responded according to the medium of interaction (ethanol). The degree of surface damage also depends on the ethanol concentration and the heavy presence of Fe and oxygen especially in that of grey cast iron. Corrosion cracks and deposits can be attributed to the reaction between the surface and the ethanol. Thus, environment of application is important in material selection. Results suggests that the microstructural changes provide to the material scientist the qualitative corrosion information of these materials in different environment. Conclusively, the study has enlightened the design engineers and material specialist on the need for proper material selection during engineering design.
Ochrona oznaczenia przedsiębiorców działających w formie spółki cywilnej
Authors: Bukowiecka Aleksandra , Faron Aleksandra
Published: October 2023

This article considers the impact of the designation of entrepreneurs doing business in the form of a civil partnership on the possibility of claiming protection of the name of the partnership under the Civil Code. This problem seems worth exploring as the issue of the protection offered by the designation of a civil partnership is so far unresolved on legislative and jurisprudential grounds. The authors use the dogmatic method, analysing judgments, articles, monographs and commentaries related to this issue. The first section is devoted to characterizing the concepts of name and company in the context of their divergence and possible correlation. The second describes how the protection of the name of a civil partnership was asserted before the 2003 amendment to the Civil Code. The third contains the views of doctrine and case law in relation to the construction of business designations, in light of the current state of the law. The final section compares the Polish legal system with the German system in terms of civil partnership identification.
Znalezienie skarbu. Prawo rzymskie a współczesne regulacje w prawie polskim
Authors: Szeląg Tomasz
Published: October 2023

This article aims to introduce the Roman legal structure of inventio thesauri (finding a treasure trove) as a case of acquisition of property, and the manner and scope of its reception in modern civil law.
Disputes related to the protection of the right to a healthy environment: the experience of Ukraine and EU
Authors: Leheza Yulia
Published: October 2023

This article discusses approaches to understanding the right to a safe environment in accordance with the legislation of the EU and Ukraine. It has been established that in modern conditions, the concept of the right to a safe natural and anthropogenic environment has undergone a transformation. The basis for protecting this right must be understood as a balance between private and public interests, as a principle for implementing and achieving the goals of the Strategy for Sustainable Development. The author has carried out a classification of disputes related to the implementation and protection of the human right to a safe natural and anthropogenic environment. The analysis substantiates the Disputes related to the protection of the rightto a healthy environment interaction between changing the understanding of the right to a safe environment and the right to initiate a claim for its protection. This leads to the conclusion that the leading bearers of public interest in the field of environmental protection are public organizations. The author’s classification of disputes in the field of implementation and protection of the natural environment is then substantiated.
The democratic legitimacy of the European Union and its laws: theoretical challenges and practical examples
Authors: Uhma Piotr
Published: October 2023

This article discusses the issue of the democratic deficit and the legitimacy of European Union institutions, and, consequently, of the law they create. The text reflects on the EU as a special type of international organization and its related problem of legitimacy. Theoretical issues of the democratic deficit and legitimacy are discussed, enriched with a comparative presentation of the views of two outstanding intellectuals, one from each side of the Atlantic. The following part of the article presents practical attempts to respond to the problem of the democratic deficit and the legitimacy of the EU, undertaken both in the European Parliament and by European institutions and member states, in the form of the recently completed Conference on the Future of Europe (CoFoE).