bluuebunny/crossref_metadata_2025 huggingface dataset:
Trace asymptotics formulas and some applications
Authors: Dimassi Mouez
Published: December 2024

Here we give results on trace asymptotics with small remainder estimates. We treat situations where the spectral parameter is implicit, and where there is no really natural associated evolution equation. We apply these results to a periodic Schrödinger operator with two different types of perturbations: slowly varying and strong. In both cases we get precise remainder estimates for the counting function of eigenvalues of the perturbed periodic Schrödinger operator in a gap of the non‐perturbed one.
Minimizing the elastic energy of knots
Authors: von der Mosel Heiko
Published: December 2024

We consider the problem of minimizing the bending energy $E_{\rm b}=\int\kappa^2\,{\rm d}s$ on isotopy classes of closed curves in $\mathbb{R}^3$ to model the elastic behaviour of knotted loops of springy wire. A potential of Coulomb type with a small factor $\theta$ as a measure for the thickness of the wire is added to the elastic energy in order to preserve the isotopy class. With a direct method we show existence of minimizers $\mathbf{x }^{\theta }$ under a given topological knot type for each $\theta>0$ . Moreover, allowing smaller and smaller thickness ( $\theta\searrow0$ ) and looking at a subsequence of the corresponding minimizers $\mathbf{x }^{\theta}$ , we obtain a generalized minimizer $\mathbf{x }$ of the bending energy $E_{\rm b}$ as a limit. It turns out that $\mathbf{x }$ is the once covered circle, if one considers the class of unknotted loops in ${\Bbb R}^3$ . In nontrivial knot classes, however, $\mathbf{x }$ must have double points, whose multiplicity and position on the curve is controlled by the value of the bending energy $E_{\rm b}(\mathbf{x })$ .
Absence of resonance near the critical line on asymptotically hyperbolic spaces
Authors: Guillarmou Colin
Published: December 2024

As a consequence of a result of Cardoso–Vodev, we show that the resolvent of the Laplacian on asymptotically hyperbolic manifolds is analytic in an exponential neighbourhood of the critical line $\{\Re(\lambda )=\frac{n}{2}\}$ . The case of non‐trapping metrics with constant curvature near infinity is also considered: there is a strip $\{\Re(\lambda )>\frac{n}{2}-\varepsilon\}$ with a finite number of resonances.
Relaxation of Ginzburg–Landau functional with 1‐Lipschitz penalizing term in one dimension by Young measures on micropatterns
Authors: Raguž Andrija
Published: December 2024

In this paper we study asymptotic behavior as ε→0 of Ginzburg–Landau functional

Iε(v):=∫Ω(ε2v″2(s)+W(v′(s))+a(s)(v(s)+g(s))2) ds

for v∈Hper2(Ω), where Ω⊆R is a bounded open interval, W is a non‐negative continuous function vanishing at ±1, a∈L1(Ω), and g is 1‐Lipschitz.

Our consideration follows the approach introduced in the original paper by G. Alberti and S. Müller (Comm. Pure Appl. Math. 54 (2001), 761–825), where the case g=0 was studied. We show that their program can be modified in the case of functional Iε: we define suitable relaxation of Iε and prove a Γ‐convergence result in the topology of the so‐called Young measures on micropatterns. Moreover, we identify a unique minimizing measure for the functional in the limit, which is the unique translation‐invariant measure supported on the orbit of a particular periodic sawtooth function having minimal period and slope dependent on a derivative of g.
Asymptotic collisions between solid particles in a Burgers–Hopf fluid
Authors: Hillairet M.
Published: December 2024

We consider the Burgers–Hopf equation on $\[$\mathbb {R}$$ outside a finite set of (moving) points coupled with transmission conditions in these points prescribing the dynamics of these points. We address the problem of asymptotic collisions. We give new proof of result in J.L. Vàzquez and E. Zuazua preprint, May 2004, and complementary results.
Sequences of L∞-optimal control problems: Γ-convergence and Hamilton–Jacobi equations
Authors: Briani Ariela
Published: December 2024

We consider the sequence of optimal control problems having as state equation y′(t)=an(t,y)+bn(t,u) (t∈(0,T], y(0)=x) and cost functional $\[$J_{n}(y,u)=\mathop{\mathrm{ess}}\mathop{\mathrm{sup}}\nolimits_{t\in[0,T]}f_{n}(t,y(t),u(t))$$ . We prove a Γ-convergence result and we study the entailed properties on the stability for the related Hamilton–Jacobi equations.
Coupled singular perturbations for phase transitions
Authors: Fonseca Irene , Popovici Cristina
Published: December 2024

The $\[$\varGamma(L^{1}(\varOmega;\mathbb{R}^{d}))$$ -limit of the sequence [Formula: see text] where Eε is the family of anisotropic singular perturbations Eε(u):=∫Ωf(x,u(x),ε∇u(x)) dx of a non-convex functional of vector-valued functions E(u):=∫Ωf(x,u(x),∇u(x)) dx is obtained where f is a non-negative energy density satisfying f(x,u,0)=0 if and only if u∈{a,b}.
Spectral operators generated by bending–torsion vibration model with two-end energy dissipation
Authors: Shubov Marianna A.
Published: December 2024

This research is devoted to the asymptotic and spectral analysis of a coupled Euler–Bernoulli and Timoshenko beam model. The model is governed by a system of two coupled hyperbolic partial differential equations and a four-parameter family of the boundary conditions modeling the action of self-straining actuators. The aforementioned system of equations of motion together with the boundary conditions is equivalent to a single operator evolution equation in the energy space. That equation defines a semigroup of bounded operators. The dynamics generator of the semigroup is our main object of interest. For each set of boundary parameters, the dynamics generator has a compact inverse. If all four boundary parameters are not purely imaginary numbers, then the dynamics generator is a nonself-adjoint operator in the energy space. We present two main results in this research. As the first one, we calculate the spectral asymptotics of the dynamics generator. We find that the complex spectrum lies in a strip parallel to the real axis, and is asymptotically close to the axis. The latter fact means that the system is stable, but is not uniformly stable. As the second main result, we prove that the set of the root vectors of the dynamics generator forms a Riesz basis in the energy space. The results obtained in the present paper allow us to conclude that the dynamics generator is a Riesz spectral operator in the sense of N. Dunford.
Asymptotic method for deriving an aeroacoustic model in a flow duct
Authors: Destuynder Philippe
Published: December 2024

The goal of this paper is to derive a fluid-structure model from a three-dimensional formulation and using an asymptotic method. The mechanical model that we consider is a flow duct, a part of which is flexible. This part can be assimilated to a shell or a membrane structure and a smart device is located on it in order to control the vibrations induced by the flow inside the duct. This control model is known to be challenging and no realistic controllability result has been obtained as far as a three-dimensional model is considered. But it can be derived for one-dimensional model. It is the reason why we are interested in this paper to analyze the links between the three-dimensional model and a limit one, assuming that the duct is quite long compared to its radius. The basic tool is a scaling method in the transverse section of the duct.
A nonlinear singular perturbation problem
Authors: Ramm A.G.
Published: December 2024

Let F(uε)+ε(uε−w)=0 (1) where F is a nonlinear operator in a Hilbert space H, w∈H is an element, and ε>0 is a parameter. Assume that F(y)=0, and F′(y) is not a boundedly invertible operator. Sufficient conditions are given for the existence of the solution to (1) and for the convergence lim ε→0‖uε−y‖=0. An example of applications is considered. In this example F is a nonlinear integral operator.
On the tunneling effect for magnetic Schrödinger operators in antidot lattices
Authors: Frank Rupert L.
Published: December 2024

We study the Schrödinger operator (hD−A)2 with periodic magnetic field B=curl A in an antidot lattice $\varOmega_{\infty}=\mathbb{R}^{2}\setminus\bigcup_{\alpha\in\varGamma}(U+\alpha)$ . Neumann boundary conditions lead to spectrum below hinf B. Under suitable assumptions on a “one-well problem” we prove that this spectrum is localized inside an exponentially small interval in the semi-classical limit h→0. For this purpose we construct a basis of the corresponding spectral subspace with natural localization and symmetry properties.
On the regularizing rate estimates of Koch–Tataru's solution to the Navier–Stokes equations
Authors: Miura Hideyuki , Sawada Okihiro
Published: December 2024

Koch and Tataru (Adv. Math. 157 (2001), 22–35) showed that the Cauchy problem of the Navier–Stokes equations has a time-local mild solution, when the initial velocity a∈vmo−1 (or, a∈bmo−1 and ‖a‖bmo−1 is small enough). The purpose of this paper is to estimate the regularizing rates for the higher-order derivatives of the mild solution. As an application of these estimates, it is proved that the solution is analytic in space variables. Moreover, it is also shown that the Serrin's condition leads to the spatial analyticity of the solution.
Multiscale nonconvex relaxation and application to thin films
Authors: Babadjian Jean-François , Baía Margarida
Published: December 2024

Γ-convergence techniques are used to give a characterization of the behavior of a family of heterogeneous multiple scale integral functionals. Periodicity, standard growth conditions and nonconvexity are assumed whereas a stronger uniform continuity hypothesis with respect to the macroscopic variable, normally required in the existing literature, is avoided. An application to dimension reduction problems in reiterated homogenization of thin films is presented.
Noncoercive problems and asymptotic conditions
Authors: Penot Jean-Paul
Published: December 2024

We provide conditions ensuring the existence of a solution to a noncoercive minimization problem. These conditions are also necessary. They enlarge the applicability of previous results due to Baiocchi, Buttazzo, Gastaldi and Tomarelli and their extensions by Auslender. A particular attention is given to the case of quasiconvex objective functions.
Dispersive estimates of solutions to the Schrödinger equation in dimensions n≥4
Authors: Vodev Georgi
Published: December 2024

We prove dispersive estimates for solutions to the Schrödinger equation with a real-valued potential V∈L∞(Rn), n≥4, satisfying V(x)=O(〈x〉−(n+2)/2−ε), ε>0.
On error bounds for monotone approximation schemes for multi-dimensional Isaacs equations
Authors: Jakobsen Espen R.
Published: December 2024

Recently, Krylov, Barles, and Jakobsen developed the theory for estimating errors of monotone approximation schemes for the Bellman equation (a convex Isaacs equation). In this paper we consider an extension of this theory to a class of non-convex multidimensional Isaacs equations. This is the first result of this kind for non-convex multidimensional fully non-linear problems.

To get the error bound, a key intermediate step is to introduce a penalization approximation. We conclude by (i) providing new error bounds for penalization approximations extending earlier results by, e.g., Bensoussan and Lions, and (ii) obtaining error bounds for approximation schemes for the penalization equation using very precise a priori bounds and a slight generalization of the recent theory of Krylov, Barles, and Jakobsen.
Propagation of Sobolev regularity for the critical dissipative quasi-geostrophic equation
Authors: Marchand Fabien
Published: December 2024

We show that under a smallness assumption on the L∞ norm of the initial data, there is a propagation of any Sobolev regularity greater than −1/2 for some weak solutions of the critical dissipative quasi-geostrophic equation. We also prove the existence of solutions in a space close to the homogeneous Sobolev space $\dot{H}$ 1, theses solutions are given by a fixed point theorem.
Blowup estimates for observability of a thermoelastic system
Authors: Lasiecka Irena , Seidman Thomas I.
Published: December 2024

With observation restricted to a single component: displacement, velocity, or temperature, we consider observability of the nonscalar thermoelastic system [1−γΔ]wtt+Δ2w−αΔθ=0,  θt−Δθ+αΔwt=0, coupling heat conduction with a Kirkhoff or Euler–Bernoulli plate model. One does have observability in arbitrarily short time here, but necessarily has blowup of the sensitivity as the observation time T→0 and also as the coupling coefficient α→0. In this paper we are able to examine the asymptotics of this blowup for two situations: global observation (i.e., on all of Ω) and, with significant restrictions, boundary observation. The blowup rates obtained are of optimal order: 𝒪(T−5/2) for global observation, corresponding to what is known for 3-dimensional systems, and exponential in 𝒪(1/T) for boundary observation, corresponding to what is known for scalar PDE problems. Our methods permit us also to obtain asymptotics as α→0 – a question which can only arise for systems.
Microscopic effects in the homogenization of the junction of rods and a thin plate
Authors: Blanchard Dominique , Griso Georges
Published: December 2024

This paper is devoted to investigate a few microscopic effects in the homogenization process of the junction of a periodic family of rods with a thin plate in elasticity. We focus on the case where the thickness of the plate tends to zero faster than the periodicity. As a consequence of the studied microscopic effects, the elastic coefficients of the membrane and bending limit problems for the plate are modified. Moreover, we observe a torsion in the homogenized “continuum” of rods which depends on the curl of the membrane displacement of the plate.
Spectral problems in the shape optimisation. Singular boundary perturbations
Authors: Nazarov S.A. , Sokolowski J.
Published: December 2024

In the paper asymptotic analysis of spectral problems is performed for singular perturbations of geometrical domains. Asymptotic approximations of eigenvalues and eigenfunctions are constructed for the scalar, second-order boundary value problems. The presented results are constructive and can be used in the analysis of shape optimisation and inverse problems.
Spectral properties of a magnetic quantum Hamiltonian on a strip
Authors: Briet Philippe , Raikov Georgi , Soccorsi Eric
Published: December 2024

We consider a 2D Schrödinger operator H0 with constant magnetic field, on a strip of finite width. The spectrum of H0 is absolutely continuous, and contains a discrete set of thresholds. We perturb H0 by an electric potential V which decays in a suitable sense at infinity, and study the spectral properties of the perturbed operator H=H0+V. First, we establish a Mourre estimate, and as a corollary prove that the singular continuous spectrum of H is empty, and any compact subset of the complement of the threshold set may contain at most a finite set of eigenvalues of H, each of them having a finite multiplicity. Next, we introduce the Krein spectral shift function (SSF) for the operator pair (H, H0). We show that this SSF is bounded on any compact subset of the complement of the threshold set, and is continuous away from the threshold set and the eigenvalues of H. The main results of the article concern the asymptotic behaviour of the SSF at the thresholds, which is described in terms of the SSF for a pair of effective Hamiltonians.
Harnack type inequalities and quantization for the uniformly elliptic Liouville equation
Authors: Bartolucci Daniele , Orsina Luigi
Published: December 2024

We extend the Harnack type inequality proved in C. R. Acad. Sci. Paris 315(2) (1992), 159–164, to the solutions of

-div(A∇u)=Veu in Ω,

with no boundary conditions. Here A is a symmetric, uniformly elliptic matrix and Ω⊂R2 is open and bounded. As an application we are able to generalize the quantization results of Ind. Univ. Math. J. 43(4) (1994), 1255–1270, to the uniformly elliptic case.
A two-dimensional eddy current model using thin inductors
Authors: Amirat Youcef , Touzani Rachid
Published: December 2024

We derive a mathematical model for eddy currents in two-dimensional geometries where the conductors are thin domains. We assume that the current flows in the x3-direction and the inductors are domains with small diameters of order O(ε). The model is derived by taking the limit ε→0. A convergence rate of O(εα) with 0<α<1/2 in the L2-norm is shown as well as weak convergence in the W1,p spaces for 1<p<2.
Ophthalmological manifestations of Peters anomaly (literature review)
Authors:   Russian Center for Eye and Plastic Surgery of the Bashkir State Medical University, Ufa, Russian Federation, Orenburkina O.I. ,   RUDN University, Moscow, Russian Federation, Babushkin A.E. ,   Ufa Research Institute of Eye Diseases of the Bashkir State Medical University, Ufa, Russian Federation, Karachurina I.R. ,   Russian Center for Eye and Plastic Surgery of the Bashkir State Medical University, Ufa, Russian Federation
Published: December 2024

In addition to hereditary, more often bilateral ocular symptoms associated with clinical manifestations such as central corneal opacification
(leucoma) with iridocorneal and/or corneolenticular adhesions, Peters syndrome (or Peters anomaly) also represents various systemic
abnormalities. Nowadays, variety of conditions termed as Peters anomaly has been extended, and it may include both unilateral and bilateral eye
disorders with or without systemic lesions. Iridocorneal and corneolenticular adhesions associated with underlying iris dysgenesis, interrupt
intraocular fluid outflow and often lead to concomitant glaucoma complicating the disease course. Oftentimes, Peters anomaly is combined
with other congenital visual malformations (e.g., microcornea, aniridia, polar cataract, etc.). Patients with Peters anomalies need early (up
to the age of 1 year) surgical treatment (i.e., corneal grafting to restore eye media transparency and to prevent obscuration amblyopia) and
anti-glaucoma interventions to reduce intraocular pressure. If mesenchymal dysgenesis and Peters anomaly are revealed, gene and systemic
disorders should be identified promptly. As a result, visual acuity will depend on ocular and systemic comorbidities.
KEYWORDS: congenital anomaly, Peters syndrome, iris dysgenesis, central corneal opacity, iridocorneal and/or corneolenticular adhesions,
glaucoma, corneal grafting, anti-glaucoma interventions.
FOR CITATION: Orenburkina O.I., Babushkin A.E., Karachurina I.R. Ophthalmological manifestations of Peters anomaly (literature review).
Russian Journal of Clinical Ophthalmology. 2024;24(4):206–210 (in Russ.). DOI: 10.32364/2311-7729-2024-24-4-7
iLLaVA: An Image is Worth Fewer Than 1/3 Input Tokensin Large Multimodal Models
Authors: Hu Lianyu , Shang Fanhua , Wan Liang , Feng Wei
Published: December 2024

In this paper, we introduce iLLaVA, a simple method that can be seamlessly deployed upon current Large Vision-Language Models (LVLMs) to greatly increase the throughput with nearly lossless model performance, without a further requirement to train. iLLaVA achieves this by finding and gradually merging the redundant tokens with an accurate and fast algorithm, which can merge hundreds of tokens within only one step. While some previous methods have explored directly pruning or merging tokens in the inference stage to accelerate models, our method excels in both performance and throughput by two key designs. First, while most previous methods only try to save the computations of Large Language Models (LLMs), our method accelerates the forward pass of both image encoders and LLMs in LVLMs, which both occupy a significant part of time during inference. Second, our method recycles the beneficial information from the pruned tokens into existing tokens, which avoids directly dropping context tokens like previous methods to cause performance loss. iLLaVA can nearly 2\(\times\) the throughput, and reduce the memory costs by half with only a 0.2% - 0.5% performance drop across models of different scales including 7B, 13B and 34B. On tasks across different domains including single-image, multi-images and videos, iLLaVA demonstrates strong generalizability with consistently promising efficiency. We finally offer abundant visualizations to show the merging processes of iLLaVA in each step, which show insights into the distribution of computing resources in LVLMs. Code is available at https://github.com/hulianyuyy/iLLaVA.
Формування мовленнєвої компетентності «екологічна грамотність і здорове життя» у підручниках з англійської мови для старших класів
Authors: Дацька Тетяна , Голик Олена
Published: December 2024

У статті наведено результати аналізу текстів 70 підручників, посібників та навчально-методичних комплексів з англійської мови, які рекомендовані Міністерством освіти і науки України. У результаті дослідження підручників щодо наявності в них текстів екологічної тематики було виявлено, що три чверті підручників таких текстів майже не містять. Тексти ж екологічної тематики, які було виявлено у підручниках, стосуються переважно таких питань, як забруднення екології (47% текстів), охорона довкілля (24%), катастрофи і стихійні лиха (22%), енергозбереження та раціональне використання енергоресурсів (4%) та відновлювані джерела енергії (3%).Оскільки в текстах підручників з англійської мови для старших класів тематика енергозбереження, раціонального використання енергоресурсів та відновлюваних джерел енергії представлена найменше, то в статті запропоновано  методологію формування мовленнєвої компетентності «екологічна грамотність і здорове життя», шляхом розробки системи вправ та завдань для формування англомовних навичок аудіювання, говоріння, читання, письма та поглиблення словникового запасу. Для розробки вправ та завдань було використано близько 60 термінів та виразів з тематики енергозбереження та відновлюваних джерел енергії. При розробці вправ та завдань застосовано кооперативно-інтерактивні технології навчання. Запропонована система вправ та завдань також дозволить формувати в учнів навички аналітичного та креативного мислення щодо енергозбереження, раціонального використання енергоресурсів та відновлюваних джерел енергії в контексті компетентності «екологічна грамотність і здорове життя».
Comparative and International Education – 2023: horizons of innovations
Authors:   Institute of Pedagogy of the National Academy of Educational Sciences of Ukraine, Lokshyna Olena
Published: December 2024

The publication includes the materials of the 7th International Scientific Conference “Comparative and International Education - 2023: horizons of Innovations" (Kyiv, 25 May 2023), dedicated to topical issues of secondary, higher, vocational and adult education in a comparative perspective; methodological guidelines of comparative education studies. Materials on the response of the international community to the challenges of martial law are presented. For educational policy makers, researchers, managers, teachers, lecturers, Doctor of Philosophy and Doctor of Science students, students.
Наукова та науково-організаційна діяльність Інституту педагогіки НАПН України у 2018–2022 роках
Authors: Aristova Nataliia ,   Institute of Pedagogy of the National Academy of Educational Sciences of Ukraine, Ladonia Kateryna ,   Institute of Pedagogy of the National Academy of Educational Sciences of Ukraine
Published: December 2024

The publication highlights the scientific and organizational activities of the Institute of Pedagogy of the NAES of Ukraine during 2018–2022. The institution's activities were focused on the theoretical-methodological and scientific-methodological support for the functioning and development of the general secondary education system in accordance with the priorities of state educational and scientific policy, as defined by strategic and programmatic documents.

The publication outlines the implementation of the statutory tasks of the Institute of Pedagogy of the NAES of Ukraine and presents the most significant scientific achievements of its researchers, including the social impact of their fundamental and applied research outcomes. It also covers innovative, publishing, scientific-expert, educational, international, project, and scientific-informational activities, cooperation with government bodies and scientific organizations, as well as the presentation of scientific periodicals and publications by the Institute's scholars in the global system of scientific communications. Additionally, the publication highlights scientific-practical events and financial support.

The content is intended for educators, researchers, administrators, and all those involved in ensuring the functioning and development of general secondary education, its scientific, methodological, expert, and consultative support, as well as those conducting scientific research and experimental developments in the fields of education and pedagogy.
European Research Area: Achievements and Prospects
Authors:   Institute of Pedagogy of the National Academy of Educational Sciences of Ukraine, Topuzov Oleg , Lokshyna Olena ,   Institute of Pedagogy of the National Academy of Educational Sciences of Ukraine, Dzhurylo Alina ,   Institute of Pedagogy of the National Academy of Educational Sciences of Ukraine, Shparyk Oksana ,   Institute of Pedagogy of the National Academy of Educational Sciences of Ukraine
Published: December 2024

The review publication "European Research Area: Achievements and Prospects" is one of the results of the project "European Research Area as a Guideline for the Development of Pedagogical Science in Ukraine: Information Hub of the Institute of Pedagogy of the National Academy of Educational Sciences of Ukraine", which was implemented in December 2022 - November 2023. The project was one of ten winners of the Ukrainian Educational Research Association. project competition under the auspices of the European Educational Research Association. In the publication, the project team - the staff of the Institute of Pedagogy of the National Academy of Pedagogical Sciences of Ukraine - presents the phenomenon of the European Research Area in the unity of origins, achievements, challenges, innovations and prospects for Ukraine. The publication is enriched with information on such important documents as the European Charter for Researchers, the Code of Conduct for the Recruitment of Researchers, and the European Research Competence Framework.
For researchers, policy makers, and the general pedagogical community.
Geography of Jochi's campaigns in medieval Qazaqstan
Authors:   Institute for Humanities Studies ABDI, Uskenbay Qanat , Dzhandosova Zarine ,   St. Petersburg State University
Published: December 2024

The article is devoted to the study of the historical geography of Jochi's military campaigns in the medieval Qazaq steppe. The eldest son of Genghis Khan, Jochi, participated in all the main military campaigns of the Mongolian troops. He led independent military campaigns against the "forest peoples" of Siberia, and together with his younger brothers led military detachments during the conquest of the cities of the Jin Empire. Nevertheless, he fully demonstrated his military talent in the war against the Kipchaks and Kangly, who settled in the modern territory of Qazaqstan. This region, called "Dasht-i Qypshaq" in medieval sources, was conquered thanks to the efforts of Jochi even before the start of the military campaign against the state of the Khorezmshahs. The article shows the process of gradual conquest of the Qazaq steppe by Jochi's troops. Several main geographical points of the conquest are highlighted, which are associated with the main river arteries of Dasht-i Qypshaq. The first stop of Jochi's troops in Qazaqstan was the Irtysh River in Eastern Qazaqstan , where they fought the Merkit army. The defeated Merkit fled further west and united with the Qypshaqs to once again oppose Jochi. Jochi's actions in Western Qazaqstan were concentrated on the Zhem and Yrgyz Rivers. Two battles with the Qypshaqs and the army of Khorezmshah Muhammad took place here. In 1219, Jochi's troops joined the main forces of Genghis Khan and participated in the conquest of cities on the Syr Darya and then besieged the capital of Khorezm, the city of Urgench. After the fall of Urgench, Jochi continued the war with the Qypshaqs and reached the Zhaiyk River. In 1223, he returned to the Syr Darya in Southern Qazaqstan and from there, after hunting with his father in the area of Qulanbasi, he went to the Irtysh. Here in Eastern Qazaqstan was the center of his new possessions, stretching from the Irtysh in the east to Zhaiyk in the west.
Book Review «The Mausoleum of Jochi Khan: History of Research». Collective monograph / Emma Usmanova (compiled, ed.-in-chief), Qanat Uskenbay, Mukhtar Kozha, Irina Panyushkina. Samarkand: International Institute of Central Asian Studies, 2024. 284 p
Authors:   National Institution of Technology, Nagamine Hiroyuk
Published: December 2024

This publication boldly challenges the ‘myths’ surrounding the Jochi Khan mausoleum and attempts to uncover the ‘historical facts’ behind the ‘myths’. As it is well known, “The mausoleum of Jochi Khan (in Kazakh – Zhoshy-Khan) is located in the historical territory of Ulytau, on the left bank of the Kengir River, 45 kilometres from the city of Zhezkazgan (Ulytau region, Republic of Kazakhstan). It is one of the most famous and probably the most discussed architectural monuments in Kazakhstan.
Military symbols in the medieval turks (based on picturatory sources)
Authors:   Institute of Archeology under the name of A. Margulan, Akhmetzhan Kaliolla
Published: December 2024

This article explores the findings of a study on the military symbolism of medieval Turks. The research focuses on specific types, forms, and designs of military standards and insignia used by Turkic tribes during the period of the Turkic Khaganates, as well as their application in military practices. To date, the history of Turkic military symbols in the medieval era has not been thoroughly examined within domestic historical scholarship. This study utilizes visual materials, primarily the art monuments of the Turks and other Turkic-speaking tribes, as primary sources. Additional sources include information from written literature, as well as archaeological findings. A detailed and in-depth analysis of these visual, literary, and archaeological materials reveals that the ancient Turks had a comprehensive system of diverse military standards and insignia, which varied in purpose, design, and supplementary elements, determining the status of the standards and the rank of their bearers. This complex, multi-tiered system of military symbols reflects the history of the Turkic tribes, the social structure of Turkic society, levels of military hierarchy, and the centuries-old traditions of the Turkic nomadic military culture.
The Effect of Shopping Lifestyle, Hedonic Shopping Motivation, and Sales Promotion on Impulsive Buying Among Gen Z Consumers on E-Commerce
Authors:   Universitas Islam 45 Bekasi, Khatimah Husnul , Harahab Jamalludin ,   Universitas Islam 45 Bekasi, Amanda Vina ,   Universitas Islam 45 Bekasi, Indriyani Devita ,   Universitas Islam 45 Bekasi
Published: December 2024

In the current digital age, characterized by rapid technological advancement, a multitude of platforms have emerged that offer a plethora of features One such platform is TikTok. However, over time, it has been utilized as a cost-effective and time-efficient means of promotion. Subsequently, TikTok launched TikTok Shop, enabling users to directly purchase products from the application. This study sets out to examine the phenomenon of impulsive buying on the TikTok Shop platform, focusing in particular on the case of Generation Z (Gen Z) consumers in Bekasi who tend to make impulse purchases through TikTok Shop. The sample was selected using the method of purposive sampling, with 100 respondents. The results of the t-test suggest that shopping lifestyle and sales promotion exert a positive and significant influence on impulsive buying. However, hedonic shopping motivation is found to be a non-significant predictor of this behavior. The lack of significance in the influence of hedonic shopping motivation may be attributed to the fact that consumers are primarily influenced by other practical factors. Consequently, further in-depth research is required by other researchers to explore impulsive buying which is influenced by various factors, including economic factors and the services offered
The Effect of Profitability in Improving Sustainability Performance with Good Corporate Governance as a Moderating Variable: A Study on Mining Companies
Authors:   UPN “Veteran” Yogyakarta, Gita Astiana Masayu Asmara , Prasetio Januar Eko ,   UPN “Veteran” Yogyakarta
Published: December 2024

The objective of this study is whether profitability affects sustainability performance with Good Corporate Governance (GCG) as a moderating variable in energy sector mining companies listed on the Indonesia Stock Exchange (IDX) for the period 2020-2023. GCG in this study is proxied by the number of board directors' meetings and the number of audit committee meetings. By using a purposive sampling technique, for the period 2020-2023, the research data amounted to 37. The data analysis technique used in descriptive statistical analysis, classical assumption test, linear regression analysis, and Moderated Regression Analysis (MRA). The results of this study indicate that profitability has no effect on sustainability performance in energy sector mining companies listed on the IDX, while GCG is able to moderate or strengthen the relationship between profitability on sustainability performance. This research provides insight for companies and stakeholders to pay attention to the role of GCG in improving corporate sustainability
The Effect of Liquidity, Leverage, and Company Growth on Going Concern Audit Opinion in Retail Sub-sector Companies
Authors:   UPN “Veteran” Yogyakarta, Sukma Rika Centani , Prasetio Januar Eko ,   UPN “Veteran” Yogyakarta
Published: December 2024

This study aims to provide empirical evidence regarding the factors that can affect going concern audit opinion on retail sub-sector companies listed on the Indonesia Stock Exchange (IDX) for the period 2020-2023. The background of this study is the importance of going concern audit opinion which is one of the early warnings for the company's business continuity, especially in the retail sector which is vulnerable to economic fluctuations. A quantitative approach was used with a population of retail sub-sector companies listed on the IDX during the period. With the purposive sampling method, 72 samples were selected. Liquidity is measured by current ratio, leverage by debt-to-equity ratio, and company growth by sales growth. Logistic regression analysis was used to test the proposed hypothesis. The results showed that leverage has a significant effect on going concern audit opinion, while liquidity and company growth have no significant effect. These findings provide new insights into understanding the dynamics of going concern audit opinion in the retail sub-sector, as well as providing a basis for further research in exploring other factors that may affect audit opinion. Future research is recommended to add non-financial variables and expand sector coverage to strengthen the generalizability of the results
Smartphone Usage and Academic Performance of Management Science Students in an Emerging Economy
Authors:   Kampala International University, Uganda, Edeh Friday Ogbu , Edeh Blessing Friday ,   Alex Ekwueme Federal University, Nigeria, Okechukwu Collins Irem ,   Alex Ekwueme Federal University, Nigeria, Mustafa Mundu ,   Kampala International University, Christine Ainebyoona ,   Kampala International University, Olanipekun Dayo Benedict ,   Kampala International University, Oben Neji Desmond ,   University of Port Harcourt, Asinai Lilian ,   Kampala International University, Aisha Najjuma ,   Kampala International University
Published: December 2024

Smartphone usage among students in tertiary institutions, particularly management sciences students, has generated concerns due to its potential negative effects on their academic performance and overall well-being. While smartphones are known to improve students' academic outcomes, their excessive use can lead to distractions and a decline in academic achievement, especially in developing economies. This study investigates the impact of smartphone usage on the academic performance of students in selected universities in southeast Nigeria. A cross-sectional survey was conducted among 300-level management science students at three public universities, with data collected through 221 valid questionnaires. The study found that students' academic performance is positively influenced by the perceived ease of use, usefulness, and enjoyment of smartphones. However, excessive use, particularly for non-academic purposes, negatively affects performance by causing distractions, addiction, and superficial learning. This study concludes that while smartphones can be a valuable academic tool, excessive usage for non-academic activities can hinder students’ academic performance. Effective management of smartphone use is essential for academic success
Assessing the Impact of Microfinancing on Economic Growth in Papua Province: An Analysis of KUR and UMi Programs (2019-2022)
Authors: Titalessy Pisi Bethania , Situmeang Radian Januari , Rahmat Rahmat , Putri Mellyanti Eka
Published: December 2024

Credit plays a vital role in supporting economic growth by aligning with development priorities to promote equitable outcomes. The People's Business Credit (KUR) and Ultra Microfinancing (UMi) programs are government initiatives designed to support Micro, Small, and Medium Enterprises (MSMEs) in Papua by providing financing for working capital and investment. Although the distribution of KUR and UMi in Papua has shown consistent annual growth, their contribution at the national level remains relatively small. This study examines the impact of these programs on economic growth in Papua Province from 2019 to 2022 using quantitative analysis and panel data regression. Findings reveal that KUR distribution, while significantly increased in Jayapura City, has a minimal impact on economic growth, as indicated by an R-squared value of 0.0058. The statistically insignificant coefficients for KUR and UMi suggest their limited contribution to economic development. External factors such as infrastructure and government support are likely more influential, underscoring the need to enhance program accessibility and explore broader determinants of Papua's economic growth. Recommendations include enhancing program accessibility and exploring other variables influencing Papua's economic dynamics.
Credit Restructuring Policy and Its Impact on Banking Financial Performance: Case Study at Bank Papua
Authors:   Cenderawasih University, Umar Hasan Basri , Kespo Michael J. ,   Cenderawasih University1
Published: December 2024

The COVID-19 pandemic significantly disrupted global economies, including Indonesia's banking sector, compelling banks to implement credit restructuring policies to support struggling businesses. This study examines the impact of Bank Papua's credit restructuring policy on debtor businesses and the bank's financial performance across three periods: before, during, and after the COVID-19 pandemic. Key performance indicators analyzed include LDR, ROA, NIM, and NPL. This study uses a Paired Sample T-test for data analysis. The findings show that the credit restructuring policy during COVID-19 had no significant impact on Bank Papua's financial performance, as all hypotheses (H1–H4) were rejected. The LDR remained stable, indicating effective liquidity management despite economic challenges. ROA showed no significant changes, reflecting steady profitability despite business disruptions. NIM experienced minor fluctuations during the pandemic due to adjustments for restructured loans but stabilized post-pandemic. Although NPL levels increased due to debtors' financial struggles, they remained within acceptable regulatory limits, demonstrating effective credit risk management. Overall, the restructuring policy provided relief to debtors but had minimal impact on the bank's financial indicators, highlighting the importance of balancing debtor support with maintaining financial stability during economic crises
«EL LEÓN SE TENDERÁ JUNTO AL CORDERO»: LAS EMOCIONES RELACIONALES EN UNA COSTILLA SOBRE LA MESA, DE ANGÉLICA LIDDELL
Authors:   Avignon Université / Universidad Complutense de Madrid, Pérez Baanante Agustín
Published: December 2024

En los espectáculos de Angélica Liddell son cruciales el dolor, el asco y la ira; pero también lo son la compasión, el amor y el perdón. Como defiende la teoría cognitiva, lejos de constituir comparti-mentos estancos, las emociones establecen una relación dinámica entre sí. Todas estas emociones apuntan hacia el ámbito relacional del fenó-meno social y pueden clasificarse como emociones relacionales sociales. Lo social supone además que la emocionalidad participa en los procesos de creación de significados, fenómeno que resulta esencial en la representa-ción de la vulnerabilidad y la confusión presentes en lo traumático. Este trabajo se interroga sobre la manera en que estas emociones de lo social despliegan un juego relacional en los últimos montajes de Liddell dedi-cados al duelo: Una costilla sobre la mesa: Madre, Una costilla sobre la mesa: Padre, así como la obra publicada asociada a ambos.
PRIMEROS EFECTOS ESCÉNICOS ESPECIALES CON LUZ ELÉCTRICA. HUGO BÄHR (30. 11. 1841 DRESDEN - 11. 06. 1929 DRESDEN)
Authors:   Real Escuela Superior de Arte Dramático / ETSAM Universidad Politécnica de Madrid, de Blas Gómez Felisa
Published: December 2024

En los 50 años que van desde la década de 1880 hasta 1920 surgió en Europa una nueva configuración técnica, estéticamente esta-ble que determinó cómo se hacía el teatro en todos los géneros y estilos. Se trabó una fuerte interdependencia entre la dramaturgia y la tecnolo-gía y se desarrolló un nuevo concepto de teatro industrial. La iluminación principal siguió siendo de gas, pero en la gran mayo-ría de los teatros, la electricidad ya formaba parte de la tecnología en el papel de «efecto especial». El escenario va a pasar a ser un espacio en lugar de una imagen y, sobre todo, va a posibilitar el naturalismo y la vanguardia.El pintor de vidrio, técnico de iluminación, físico y empresario Hugo Bähr, considerado en el teatro alemán, merecidamente, como el «padre de la luz», es una figura clave que se sitúa estrechamente vinculada a esta introducción de la nueva tecnología eléctrica.
LAS PUESTAS EN ESCENA DE EL PÚBLICO DE FEDERICO GARCÍA LORCA
Authors:   UNIR, Gómez Sánchez Begoña
Published: December 2024

El texto teatral El público de Federico García Lorca cali-ficado como «teatro imposible» e «irrepresentable» es una de las obras dramáticas del autor que ha contado con un número de representaciones sustancialmente menor en comparación con otras de sus obras de teatro. En este artículo se tratarán los antecedentes nacionales e internaciona-les y el primer estreno mundial y, a la vez, nacional del texto para luego adentrarse en el primer montaje teatral de gran difusión de El público, la propuesta de Lluís Pasqual en 1986. A continuación, se analizarán las escenificaciones realizadas a finales del siglo XX y las puestas en escenas de comienzos del siglo XXI dentro de la búsqueda de nuevos lenguajes expresivos. En este recorrido se analizarán los principales ras-gos dramatúrgicos y escénicos de los montajes con el objeto de elaborar unas posibles constantes y divergencias en la escenificación española de El público de Federico García Lorca.
PERSEVER ANTE NOSTALGIA LA RURALIDAD Y SUS DESBORDES EN LA DRAMATURGIA DEL TEATRO COMUNITARIO ARGENTINO: EL CASO DE LA COMUNITARIA (ARGENTINA)
Authors: Fernández Clarisa Inés
Published: December 2024

Este trabajo presenta un análisis de la obra de teatro co-munitario argentino Se cayó el sistema, disculpe las molestias (2014) de la Cooperativa la Comunitaria, una organización social y cultural perte-neciente a las provincias argentinas de Buenos Aires y La Pampa. Nos proponemos reflexionar en torno a los sentidos sobre la vida y el trabajo rural, la actividad productiva y la vida de consumo que construye la dramaturgia de la obra señalada, con el objetivo de generar un aporte al campo de los Estudios teatrales en general y al del teatro comunitario en particular. Por otro lado, nos interesa evidenciar las características distintivas que asumen las producciones de teatro comunitario rural en relación a las de contextos urbanos. El trabajo plantea se plantea desde un abordaje transdisciplinario (Bugnone et. al, 2019) que nos permita articular en el análisis los sentidos de la dramaturgia con los modos de producción del grupo, sus dinámicas organizativas, su propuesta esté-tica y política, para lo cual articularemos aportes teóricos de la Sociolo-gía, la Antropología y los Estudios teatrales.
Structural, Morphological, and Optical Properties of Pure and Copper doped Zinc Oxide Nanoparticles prepared by Co-precipitation Technique
Authors: Dange S. S. , Dange S. N.
Published: December 2024

Pure and Copper-doped Zinc Oxide (ZnO)
nanoparticles were synthesized using a microwave-assisted
co-precipitation method. The copper doping concentration
was varied to 5 wt% and 10 wt%, while the pH of the bath
solution was kept constant. The structural, morphological,
and optical properties of the synthesized nanoparticles were
characterized using X-ray diffraction (XRD), scanning
electron microscopy (SEM), UV-visible spectroscopy, and
photoluminescence (PL) spectroscopy. The XRD analysis
confirmed that both pure and Cu-doped ZnO nanoparticles
exhibit a hexagonal wurtzite structure, with a shift in the
XRD peak positions for the Cu-doped samples. SEM images
revealed irregular morphology for pure ZnO and 10 wt%
Cu-doped ZnO nanoparticles, whereas 5 wt% Cu-doped ZnO
nanoparticles displayed a spherical morphology with an
average particle size ranging between 50-100 nm. The optical
band gap decreased for 5 wt% Cu doping concentration. PL
spectroscopy indicated a reduction in the intensity of the
near-band-edge emission with increasing Cu content
Agrosmart Precision Soil Analysis Bot for Nutrient Prediction and Fertilizer Recommendations
Authors: Sandeep Kumar  , Sanket Sharanappa Wali  , Vinayak Tonne  , Sudarshan D  , Jyoti R Munavalli
Published: December 2024

Agriculture, a key global economic sector, especially in India, suffers from low productivity due to climate variability, resource inefficiencies, and limited data, but precision agriculture, leveraging technologies like IoT, machine learning (ML), spectroscopy, and real-time analytics, proposes transformative solutions such as real-time soil analysis systems utilizing sensors like TCS34725 to measure soil nutrients (NPK) via RGB values processed by ML models like Random Forest, XGBoost, and LightGBM, with data delivered through user-friendly mobile apps built on Flutter and Firebase, enabling cost-effective, sustainable, and efficient crop and fertilizer recommendations, while IoT- and AI-based systems using ANN, linear regression, and GNB models further optimize fertilizer usage, enhance soil health, and improve yields by predicting soil properties like pH and environmental conditions, addressing food security and promoting sustainable practices with innovations like blockchain-based fertilizer delivery and robotics for autonomous farming tasks like soil assessment, disease diagnosis, and crop monitoring, as demonstrated in projects like "FertiForecast," "AI-Based IoT Framework for Smart Coconut Farming," and "Autonomous Agricultural Monitoring Robot," which integrate ML, IoT, and robotics for data-driven farming, tackling inefficiencies, empowering small-scale farmers, and advancing resource-efficient, sustainable agriculture globally.