bluuebunny/crossref_metadata_2025 huggingface dataset:
Enhancing magnetic field support for the electrodeposition of nano-structured metal layers by reducing global cell flow
Authors: Huang M. , Skibinska K. , Zabinski P. , Eckert K. , Mutschke G.
Published: July 2024

Magnetic fields could be a helpful tool for improving the growth of nanostructures on metal layers during electrodeposition processes. It is well known that an electrode-normal magnetic field promotes the growth of mm-sized conical structures by generating a supportive local electrolyte flow. However, we found recently that for smaller cones of μm/nm-size, this local flow may often be superseded by a stronger global cell flow, thus preventing the structuring effect. We, therefore, discuss improved cell setups to minimize the global flow and to enable the magnetic support of conical growth. Tables 1, Figs 6, Refs 12.
A liquid metal MHD vortex generator for energy harvesting applications
Authors: Rivero M. , Ávalos-Zúñiga R. A. , Cuevas S.
Published: July 2024

Liquid metal (LM) technologies for energy harvesting are gaining attention due to their unique properties. An LM vortex magnetohydrodynamic generator is a suitable and robust option among different approaches used for energy harvesting. In this device, LM is driven into a cylindrical cavity to produce a swirling flow, interacting with an imposed axial magnetic field and inducing electric currents that can be extracted to power an external electrical system. However, to maximize the power output, the effect of the electrical resistance on the flow dynamics and electrical parameters must be evaluated. Here, an evaluation is carried out with both the commercial software COMSOL Multiphysics and a theoretical model, whose results are partially validated with the experimental data obtained from a device built for this purpose. In addition, the effect of the electrode size on the global electrical variables, such as voltage, current and electrical power, is investigated numerically. Figs 5, Refs 9.
Induction melting in a cold crucible furnace applied to innovative high-melting temperature metals
Authors: Guglielmi M. , Baake E. , Köppen A. , Holzmann E. , Herbst S. , Moradi Maryamnegari S.
Published: July 2024

The necessity to process chemically reactive metals makes the cold wall crucible an attractive alternative to conventional furnaces, even for materials with a melting point of 2500oC and higher. A significant research work in this field is though missing. In this paper, steps conducing to melting high-melting temperature metals (niobium, in this case) by electromagnetic induction are described. Multiphysical numerical simulations were successfully validated for aluminium and titanium-aluminium alloy. In the case of niobium, authors evidence some differences between numerical and experimental results, and limits of the induction melting setup are examined for future improvements. Tables 1, Figs 7, Refs 11.
MHD wake around a cylinder for different values of the magnetic Reynolds number
Authors: Collu S. M. , Alemany A. , Montisci A.
Published: July 2024

The wake around a cylinder is well known and relatively well documented. The flow configuration depends on the Reynolds number and exhibits the classical von Karman street when this number reaches a sufficiently high value. When we consider a conducting liquid, the flow configuration becomes sensitive to the action of a magnetic field. In this work, we were interested in a general configuration when the magnetic field is aligned with the flow at infinity downstream, for a cylinder with the axis perpendicular to the flow and magnetic field direction. The problem was treated numerically for small and high magnetic Reynolds numbers. In the present work, results for both are proposed and obtained by numerical simulation. Figs 14, Refs 11.
Crucible considerations in induction furnace degassing
Authors: Petrykowski J. C.
Published: July 2024

In a number of advanced materials processing applications, including float zone refining of electronic materials, forming of metallic glasses and induction melting of light alloys, oscillatory and non-oscillatory electromagnetic forces associated with the processing application are found to enhance surface shape, nucleation of precipitates, evolution of crystal nucleation sites, segregation of alloy components, grain refinement and degassing [1]--[3]. For cases where the material being processed is containerized and where the time dependence is oscillatory, these forces give rise to acoustic waves which carry energy to the boundaries of the containerized volume leading to a reduction in process efficacy should the container not present the proper acoustic impedance. This paper considers acoustic energy exchange between the molten alloy and the crucible of an induction furnace and the attendant impact on degassing. Tables 1, Figs 4, Refs 11.
Axisymmetric MHD viscous flow about a highly-slipping sphere translating parallel with a uniform ambient magnetic field
Authors: Sellier A. , Aydin S. H.
Published: July 2024

The slow translation of a highly-slipping sphere with radius a in an unbounded viscous conducting Newtonian liquid with constant viscosity μ and conductivity σ is investigated. The liquid is subject to a steady uniform magnetic field B parallel to the sphere velocity, flows about the sphere and exerts on its a drag force. The resulting axisymmetric MHD flow is expanded as a serie of fundamental flows earlier gained elsewhere for a different Oseen flow problem. The coefficients entering in the serie are determined by enforcing the impermeability and zero tangent stress conditions on the sphere surface, As a result, the highly-slipping sphere drag coefficient Cd is numerically obtained and its sensitivity to the problem Hartmann number Ha=a|B|/(μ/σ)1/2 is examined. Moreover, a polynomial handy formula for Cd is proposed for Ha ≤ O(1) and the computed velocity patterns are presented and discussed for Ha=1,10. Tables 2, Figs 4, Refs 12.
Experimental validation of liquid metal MHD numerical models
Authors: Jegorovs A. , Dzelme V. , Jakovičs A.
Published: July 2024

This study is aimed at experimental validation of a numerical model of fully coupled electromagnetic and fluid dynamics processes. The experiment is a laboratory-scale system, where a rotating permanent magnet induces an intense flow and free surface deformation of liquid Galinstan in a rectangular vessel. The numerical model is two-phase, 3D, transient, turbulent, and is constructed using ElmerFEM, OpenFOAM and EOF-Library codes. Validation is based on optical imaging of free surface projections. Statistical data, such as the time-average and standard deviation of the free surface profile, are compared with experiments and simulations. Results show that a Large Eddy Simulation turbulence model gives a good agreement with experiments, whereas a Reynolds-Averaged Navier-Stokes k-ω SST model causes artificial damping of free surface deformation. Figs 8, Refs 9.
2022 year experiments at the Riga Dynamo facility
Authors: Lipsbergs G. , Gailītis A.
Published: July 2024

The Riga Dynamo facility was built for laboratory reproduction of the continuously running natural process which creates the entire magnetic field of the environment on the Earth, great planets, the Sun, stars and even galaxies. In all of them the field is created by an intense helical movement in large volumes of an electrically conducting fluid. We use a swirling flow of 2 m3 molten sodium to clarify the principal points of the generation process: scaling rules for both dynamo start and saturated generation, magnetic field profiles in both vertical and horizontal directions and its temporary spectrum, deformation of the environmental field during the start of dynamo. Figs 5, Refs 2.
Magnetohydrodynamic flow in stepwise bent circular pipes
Authors: Bühler L. , Klüber V. , Mistrangelo C.
Published: July 2024

Asymptotic analyses and numerical simulations have been performed to predict liquid metal flow in an electrically conducting circular pipe that exhibits stepwise bends in a strong uniform magnetic field. The present work is motivated by applications in nuclear fusion engineering, where such step-shaped double bends are foreseen in the shield behind the liquid metal test blanket module [1] that will be tested in the International Thermonuclear Experimental Reactor (ITER). Although the geometry is relatively simple, quite complex and unexpected flow patterns are observed, depending on the orientation of the magnetic field. For that reason, the present type of flow constitutes an interesting fundamental problem in magnetohydrodynamics. Figs 6, Refs 17.
Nonlinear laminar `dynamos' linear in one coordinate
Authors: Mestel A. J. , Arslan A. , Vaz R. H. , Mancini E.
Published: July 2024

We consider two self-similar flow fields, for which the Navier--Stokes equations reduce to ODEs. If the magnetic field has a similar structure, then the induction equation also reduces to ODEs. The coupled system can be regarded as a kinematic dynamo problem, but also the fields grow until they saturate as exact solutions of the nonlinear system. The extent to which these solutions can be regarded as genuine dynamos is discussed. Figs 6, Refs 13.
Electrically driven free shear flows in a duct under a transverse uniform magnetic field
Authors: Kalis H. , Kolesnikov Yu.
Published: July 2024

A mathematical model of two-dimensional electrically driven laminar plane free shear flows in a straight duct under the action of an applied spanwise uniform magnetic field is considered. The mathematical approach is like that used in the research of Hunt and Williams (J. Fluid. Mech., 31, 705, 1968) and Kolesnikov and Kalis (Magnetohydrodynamics, vol. 57, 2021, no. 2). A system of stationary partial differential equations with two unknown functions of velocity and induced magnetic field is solved. The electric current is injected into the liquid by means of two couples of linear electrodes located vis-à-vis on opposite duct walls, perpendicular to the magnetic field. Three cases are considered. One pair of electrodes is current supplied and, depending on the direction of electric current injection on the electrode pair, two coinciding or two counter flows are also driven. At Hartmann numbers Ha >> 1, quasi-potential cores are formed in these flows, bounded by lateral Shercliff free boundary layers parallel to the field and two Hartmann layers on the walls perpendicular to the field. As a result, almost all of the injected current passes through these layers. An increase of the magnetic field leads only to an internal rearrangement of the potential cores of the flows. The Hartmann number varies in the range from 1 to 100. Figs 15, Refs 11.
Growth rate of the initial magnetic energy in isotropic velocity field with non-Gaussian distribution
Authors: Illarionov E. A. , Sokoloff D. D.
Published: July 2024

A method is proposed for including the effects of non-Gaussian velocity field distribution in the estimation of the growth rate of magnetic energy in a random flow with finite memory time. The method allows a reduction to the Gaussian case that was investigates earlier. For illustration, the multivariate Laplace distribution is considered and compared with the Gaussian one. Figs 1, Refs 8.
Parametric study for the induced electric current of an electromagnetically driven flow
Authors: Acosta-Zamora K. P. , Beltrán A.
Published: July 2024

In this work, the electric scalar and the magnetic vector potential magnetohydrodynamic formulations are implemented in the COMSOL Multiphysics software for the simulation of an electrovortex flow in a cuboid vessel. The flow is generated by a Lorentz force produced by the interaction of a direct electric current, which is injected through two solid electrodes located on the top and bottom of the vessel and an external magnetic field generated by one or a pair of permanent magnets. A good comparison between numerical and experimental velocity profiles reported by the workgroup is observed. The induced electric current fields obtained from Ohm's and Ampere's laws are explored in the solid electrodes and liquid metal regions. A parametric study for the interaction parameter in the range of 1 ≤ N ≤ 50 is presented. For both formulations, the same induced electric current distributions were obtained. Interestingly, for a pair of magnets, the induced electric current distribution is symmetric and the penetration of its main component into the solid electrodes increases with N, whereas for one single magnet, the induced current is non-symmetric and its penetration is small. Results also indicate that depending on the MF there are zones, where the induced electric current is small and the velocity is high. For a pair of magnets, this behavior is observed close to the interface of the LM-solid electrodes. Tables 2, Figs 10, Refs 43.
Optimizing disc dynamo
Authors: Priede J. , Avalos-Zúñiga R. A.
Published: July 2024

We present an optimized design of our recently realized disc dynamo. Like the original set-up, the optimized dynamo consists of a flatmulti-arm spiral coil and a co-axially placed disc which is connected to the former by sliding liquid metal contacts. In contrast to the original set-up, the disc and the coil in the optimized design have different sizes. This allows the disc to capture more of the high-density magnetic flux generated in the inner part of the coil and to avoid the reverse flux in the outer part of the coil. By optimizing the coil and dics radii, the critical magnetic Reynolds number can be reduced from ≈ 34.6 when the disc and the coil have equal inner and outer radii with the ratio ri/ro ≈ 0.36 to Rm ≈ 11.6. This lowest possible disc dynamo threshold is attained when the disc and the coil have relatively narrow widths. Using a slightly suboptimal but more practical set-up with the inner and outer radii of the disc and coil equal to to (0.3,0.9) and (0.74,1), respectively, self-excitationis expected at Rm ≈ 14.6. Figs 7, Refs 10.
A simulation method for the electromagnetic railgun based on equivalent circuit
Authors: Wen Ruihu
Published: July 2024

As a typical electromagnetic launcher, electromagnetic railguns have attracted widespread attention for their broad military application prospects. It is known that skin effects occur during electromagnetic railgun launch. How to quickly and accurately simulate these skin effects is of importance for the application of electromagnetic launch technology. This paper proposes a static two-dimensional finite element model in series with one variable equivalent inductance and three resistances for simulating the dynamic electromagnetic railgun launch. Two skin effects are presented by changing equivalent inductance and resistances. For an electromagnetic railgun including two rails of length of 2 m and width of 0.3 m and square armature of 0.3 m long, after 4.23 ms under a pulse current of a peak of 1 MA, the simulation results based on this proposed static 2D model show that the armature can leave the rails with a velocity and acceleration increasing to 1,464 m/s and 614,876 m/s2, respectively. For an equivalent circuit connected in series, the equivalent inductance, AC resistance, velocity skin effect resistance, and back EMF resistance are 0.49 μH, 2.5 mΩ, 7.1 mΩ, and 4.44 mΩ, respectively, whereas the breech voltage can increase to 1.36 kV. The proposed method simplifies the meshing in the finite element model, saves computational cost, and is conducive to study electromagnetic railgun design and projectile magnetic field shielding. Key words: Electromagnetic railgun, equivalent inductance, equivalent resistance. Tables 1, Figs 7, Refs 10.
Research on precise and stable seed flow delivery control for plasma MHD power generation
Authors: Zhu Peiqi , Liu Baolin , Xia Qi , Zhou Xingming , Peng Aiwu
Published: July 2024

In this paper, a technique for precise and stable delivery control of alkali metal seed flow is proposed and experimentally verified. A high-pressure syringe driven by a stepping motor delivers liquid alkali metal seeds through a pneumatic atomizing spray gun. The seed jet is uniformly mixed, heated, vaporized and ionized by the high-temperature main flow in the plasma generator to produce a plasma with high conductivity. Based on the high-temperature arc wind tunnel test platform, an experimental study of the alkali metal cesium seed flow measure and plasma ionization characteristics was carried out. The results show that the fluctuation range of the measured seed flow was 5.93-10.39% at a small flow rate of 19 mL/min. For the back pressure of 6 atm, the fluctuation range of the measured seed flow is 6.04-11.55%, which proves that the back pressure of the plasma generator has insignificant effect on the seed flow. The plasma ionization characteristics test shows that the conductivity of the argon cesium equilibrium plasma is between 26.93-31.69 S/m, indicating that the ionization characteristics of the plasma are relatively stable, which can indirectly prove that the seed system has a precise and stable flow rate during the actual power generation. Key words: MHD power generation, alkali metal seed, seed fraction, precise and stable injection. Tables 1, Figs 9, Refs 11.
Directional solidification of A356 aluminium alloy under the interaction of DC magnetic field and electric current
Authors: Nikoluškins R. , Kaldre I. , Milgrāvis M. , Krastiņš I. , Beinerts T. , Kalvāns M. , Bojarevičs A.
Published: July 2024

This article describes an experimental investigation and results of electromagnetic (EM) interaction during the continuous casting of the silicon-rich aluminum alloy A356. Directional solidification of aluminum rods with a diameter of 10 to 12 mm under the interaction of a moderate static magnetic field of 0.45 T and an applied DC electric current has been studied. The developed EM interaction drives a small-scale molten metal flow directly in the mushy zone, which impacts the heat and solute transport. However, this affects the microstructure and, in the end, the properties of the alloy. Tables 3, Figs 23, Refs 23.
Electrically driven plane free shear flow in a duct under an oblique transverse uniform magnetic field
Authors: Kolesnikov Yu. , Kalis H.
Published: July 2024

A mathematical model of electrically driven laminar free shear flows in a straight duct under the action of an applied oblique transverse uniform magnetic field is considered. The mathematical approach is similar to that used in [1]. A system of stationary partial differential equations with two unknown functions of velocity and induced magnetic field is solved. Three different cases of electric current supply to the liquid are considered. An electric current is introduced into the liquid first by one pair of linear electrodes, and in two other cases by two pairs of electrodes located on the upper and lower walls of the duct. The cases are analyzed when the angle of inclination of the magnetic field vector to these walls is ϕ0 = π/4. Depending on the direction of the electric current supplied to the pairs of electrodes, two coinciding in direction or two opposite inclined flows are driven in the zone between these walls. Increasing the magnetic field only leads to an internal rearrangement of the flows. The Hartmann number Ha ranges from 1 to 10, at which MHD effects distinctly enough are already displayed. Figs 19, Refs 11.
CFD simulation of copper magnetoelectrolysis cell in the presence of parallel and antiparallel Lorentz forces
Authors: Najminoori M. , Mohebbi A.
Published: July 2024

Development of magnetohydrodynamic (MHD) convection during copper magnetoelectrolysis between two vertical electrodes under galvanostatic conditions was studied. An unsteady two-dimensional CFD simulation under a linear external magnetic field was performed. The governing equations with inclusion of Lorentz and buoyancy forces were solved. For pressure-velocity coupling and pressure interpolation, the SIMPLE algorithm and the second order scheme were used, respectively, and the first order implicit temporal discretization was used using a pressure-based CFD solver. CFD results were investigated in two orientations of the Lorentz force relative to the buoyancy force, parallel and antiparallel. The obtained results on velocity and concentration profiles in a parallel case showed a good agreement with the experimental data and results of a recent simulation by the finite element method. Moreover, a similar trend was observed between the results of the antiparallel case and experimental data. The results showed that circular MHD convection between electrodes has a complex interaction with the buoyancy force and this interaction leads to velocity decay. The maximum vertical velocity component at mid-height of the cell for pure natural convection electrolysis is 0.3 mm/s, which is about 18 and 21% of its value in parallel and antiparallel cases, respectively. Moreover, its reduction at the second stage of the antiparallel case was about 90%, which is much more than 33% in the parallel case and 21% in the pure natural convection case. The competition between the Lorentz force and the buoyancy force is also discussed. Key words: CFD, magnetoelectrolysis, Lorentz force, MHD convection, natural convection, concentration stratification. Tables 1, Figs 23, Refs 26.
Axisymmetric helical magnetorotational instability in a Taylor-Couette flow with sufficiently large positive shear
Authors: Zhao Yurong , Hollerbach Rainer , Hong Wenpeng , Yu Yang , Tao Jianjun Tao
Published: July 2024

The range of parameters is explored for the axisymmetric helical magnetorotational instability in a Taylor-Couette flow with high enough positive shear. The magnetic Prandtl number has a wide range from 10−6 to 100. The ratio of the azimuthal magnetic field to the axial magnetic field β is equal to 20, 50, 70 and 100. In different parameters, the stability curves are computed and shown in the plane for the Lundquist numbers S on the x-axis and for the magnetic Reynolds numbers Rm on the y-axis. The computed results can help find or avoid the instability in the corresponding flows. Figs 6, Refs 29.
Numerical study of instabilities in magnetized inhomogeneous collisional dusty plasmas under dust dynamics
Authors: Pachauri Shachi , Malik Jyoti , Misra Kamakhya Prakash , Singh Shiva Shakti
Published: July 2024

This article describes a numerical investigation of the behaviour of streaming instabilities in a magnetized, inhomogeneous, and collisional dusty plasma with typical plasma parameters when plasma properties are influenced by dust dynamics. Basic fluid equations have been formulated, including the dynamics of negatively charged dust particles along with the recombination effect on the surface of charged dust particles. The effect of dust-neutral collision has also been taken into consideration in the considered plasma model. A magnetic field of static intensity is applied at an arbitrary propagation angle. A normal mode analysis method has been used to derive dispersion relations of the existing instabilities, which are solved numerically using MATLAB. Two instabilities have been investigated, whose profiles of phase velocities and the normalized growth rates with respect to different plasma parameters like the magnetic field strength, recombination rate, electrostatic potential, dust charge and density of neutral were observed and interesting findings are noted. Figs 9, Refs 40.
Numerical analysis of the self-propulsion performance of seawater MHD propulsion underwater vehicle
Authors: Chen Xiaoqiang , Zhao Lingzhi , Wang Feng , Peng Aiwu
Published: July 2024

Prediction of the self-propulsion performance of seawater MHD underwater vehicles is of great significance for the design and rapid optimization of the vehicle. Based on a typical advanced two-pole superconducting magnet (with a large warm hole of 260 mm and a high magnitude of the magnetic field of 6.5 T) which is close to practical application, this paper considers the underwater vehicle with the most promising application prospect of the MHD thruster as a research object. Based on the Fluent MHD module, using the full three-dimensional CFD numerical simulation method, and starting from the coupling mechanism of electric, magnetic and fluid physical fields of the MHD thruster, the paper analyzes the generation sources, influencing factors, and variation laws of thrust under self-propulsion from the point of view of electromagnetic, pressure and viscous forces. Efficiency characteristics of MHD thrusters are analyzed by considering propulsion, channel, electromagnetic, and jetting efficiency. Finally, a more comprehensive self-propulsion performance of the seawater MHD thruster is obtained. Key words: Seawater MHD thruster, self-propulsion performance, thrust distribution, three-dimensional numerical simulation. Tables 2, Figs 26, Refs 22.
Challenges and Solutions in Religious Guidance for Converts (muallaf) in Tanjung Beringin, Tanah Karo
Authors: Lubis M. Alif Erhanda , Abdurrahman Zulkarnain
Published: July 2024

This study investigates the primary challenges and potential solutions in the religious guidance of converts (muallaf) in Tanjung Beringin Village, Tanah Karo, North Sumatra. Utilizing a descriptive qualitative approach, data were collected through in-depth interviews, field observations, and documentation. This study showed that the absence of continuous religious guidance, combined with the lack of permanent da’i, has weakened the religious understanding and enthusiasm among the converts. Additionally, parental neglect in supporting their children's religious education exacerbates this issue. The study proposes several solutions, including establishing collaborations with Islamic organizations and da'wah institutions to provide alternating da’i, appointing permanent Islamic religious instructors, revitalizing basic Islamic studies, and enhancing parental involvement in religious education. These measures aim to strengthen the religious identity and resilience of the convert community against external influences.
The Beginning of the Human Rights 5th Generation: A Lesson from Covid-19 Outbreak in Indonesia
Authors: Al-Fatih Sholahuddin , Aditya Zaka Firma
Published: July 2024

This research tries to find the root cause of the spread of fake news during the Covid-19 pandemic in Indonesia. The Indonesian Ministry of Information and Communication recorded that there were 519 or 56% of the total 926 fake news during semester 1 of 2020. This figure doubled in October 2020 with a total of 1,028 fake news in the health sector especially dealing with Covid-19. Whereas, in the perspective of Human Rights, everyone has the right to get the correct information. This statement is guaranteed in Article 28F of the 1945 Constitution, Article 19 UDHR, and Article 19 of the ICCPR. These problems were then analyzed using a prescriptive method to find new concepts related to fake news to prevent a pandemic. This study indicates that the spread of fake news during the Covid-19 pandemic in Indonesia was greatly influenced by low literacy and public knowledge, lack of self-awareness, and a tendency to attack political opponents
Narrating Recruitment Model for Legislator Candidates: Is It Fair?
Authors: Mutawalli Mukhlis Muhammad , Maskun Maskun , Budiyanto Budiyanto , Jumas Jumas , Rahadian Dian , Olemanu Lohalo Georges
Published: July 2024

This research analyzes the problems of democratic and aspirational recruitment models and mechanisms for legislative candidates by political parties, aiming at formulating cadre-based recruitment arrangements that best represent democratic ideals. Using normative legal, conceptual, statutory and comparative approaches, this article argues that there are two principal recruitment problems. First, legal arrangement pertaining to methods, procedures, and requirements for the recruitment is generally absent from the statutory regulations.  Second, the internal process of decision-making within the political party is generally undemocratic, owing partly to the pragmatism and power-oriented calculation of the elites within the party. Recommendation for ideal recruitment arrangements is thus proposed to ameliorate these problems. Among others, the recruitment by political parties must consider aspects of representativeness, ideological consistency, internal political party flow, development of career path-based cadre systems, and quota fulfillment. Additionally, political party cadre needs training to boost their skills in carrying out main duties and functions as a member of the Board People's Representatives
Portrait of Patriarch Nicon in the Synod’s History by Metropolitan Paisius Ligarides of Gaza
Authors:   Institute of Philology of the Siberian Branch of Russian Academy of Sciences, Sevastyanova Svetlana K. , Rylik Polina A. , Bondach Albert G.
Published: July 2024

The article aims to analyze the metaphors and comparisons used by Metropolitan of Gaza Paisius Ligarides to describe the appearance, spiritual state and certain deeds of Patriarch Nicon (1652–1666, †1681). Impressed by one of the portraits, painted by the German artist Johann Deters (†1655), depicting Moscow’s hierarch’s appearance, ethnic, physical and physiological features, Ligarides created an “anti-portrait” of the disgraced Patriarch. Ligarides identifies some features which, according to him reveal the “beastlike” appearance of Patriarch thus, reflecting Ligarides’ subjective negative attitude towards Nicon. Comparisons with empusa (lamia and mormolyce), kallikantzaros, cyclops, centaur, ephialtes, and the Gorgon beheaded by Perseus and Telchin allowed Ligarides to draw an unreal image of Nicon and in a way that readers could visualize it in their own way based of their extent of erudition and impressionability. This study attempts to match the grotesque image of the Patriarch with the medieval culture tradition, assuming that “anti-hagiography” and portrait art of Flemish artist Quentin Masseys (1466‒1530) have certain cultural parallels with Ligarides’ literary methods. Finally, in portraying Nicon’s appearance Paisius Ligarides appears to have been based on Pseudo-Aristotle’s Physiognomy although, Aristotle’s statements about the connection of appearance with moral qualities seem to be entirely misinterpreted. Also the original text of the part, devoted to portraiture of Nicon, as well as its contemporary translation into Russian will be published for the first time. The publication of the text is accompanied by factual commentary.
SUPER(IM)POSITIONS: Subverting Melodramatic Representation Through Personal Unpredictability
Authors: Emilio Santoyo
Published: July 2024

This Artistic Research in and through cinema explores the possibilities of using outdated melodramatic elements of cinematic representation in a new way, dissolving the intersection between the personal and the fictional as a tool for creating a redemptive act of filmmaking. "Super (im) positions: Subverting melodramatic representation through personal unpredictability" delves into the transformative potential of these elements within cinematic representation. By dissolving the boundaries between the personal and the fictional, this work engages in a redemptive act of filmmaking that reimagines melodrama. The approach employs a contemporary, polyphonic, and playful film language to propose a new form of melodrama—one that acknowledges its inherent perversity to challenge and deconstruct its toxic narratives.

Rooted in the pervasive influence of telenovelas and melodrama, particularly within Mexican culture, this exploration questions and critiques the genre's impact on cultural and individual perceptions of love and relationships. The research was catalysed by a significant personal and professional rupture, leading to a critical examination of the genre's conventions.

By employing a contemporary, polyphonic, and playful film language, Santoyo reimagines melodrama as a genre capable of portraying complex, personal emotions and generating critical, boundary-pushing narratives. This self-reflective genre deviation, temporarily termed the "New Melodrama," seeks to subvert traditional melodramatic tropes by acknowledging and confronting their perverse nature. Through this approach, Santoyo aims to dismantle the toxic knowledge perpetuated by conventional melodrama, offering a sophisticated and nuanced critique from within the genre itself. His work presents a trojan horse strategy, using the familiar systems of melodramatic representation to question and ultimately transform them, proposing a relevant and self-aware cinematic experience.

Through innovative use of superimpositions and a deliberate deconstruction of melodramatic mise-en-scène, this study aims to create a critical and self-reflective genre deviation termed "New Melodrama." This method seeks to subvert traditional cinematic conventions by integrating multiple perspectives and temporalities, fostering a richer, more complex narrative experience. Ultimately, the research stands as a trojan horse within the film industry, using the very mechanics of melodrama to critique and reinvent it, offering a fresh, introspective take on a genre often dismissed as superficial.
Flame and Flow Analysis of LPG in Household Cookers with Rectangular Ports
Authors: Döner Nimeti , Şahin Berkay , İlbaş Mustafa
Published: July 2024

The cold flow and flame characteristics of liquefied petroleum gas (LPG- mixing 70% butane and 30% propane) in a household stove are experimentally investigated. The household stove has three cookers with rectangular ports and different sizes. The flame temperature and gas flow velocity are measured at maximum and minimum flow rates under laboratory conditions. Temperatures in the horizontal, vertical, and diagonal directions are measured at a distance between the reference point and 3 cm. The temperatures between the maximum and minimum flow rates show significant differences for all cookers. Flame temperatures at the gas exit point are 620‒710 °C at the maximum gas flow rate. On the largest cooker, the gas emissions in the diagonal direction at the maximum flow rate are also measured. The maximum value of CO emissions 7000 ppm is measured at the reference point. CO2 emissions are 12% between the reference point and 1.5 cm and slightly decreasing to 11% at other points. NOx measurements (ppm) show a peak value of 180 ppm at the 0.5 cm point. Cooker 1 is in the turbulence regime at maximum flow rate, while the other cookers are in the laminar regime.
Wiejskie przymiarki (napłatki) na Śląsku w XIII–XIV wieku — propozycja typologii i wybrane zagadnienia szczegółowe
Authors: Fokt Krzysztof , Legut-Pintal Maria
Published: July 2024

Celem tekstu jest usystematyzowanie i uzupełnienie wiedzy na temat wiejskich przymiarków (namiarków, zbytków, napłatków), czyli działek gruntu wymierzanych poza podstawowym areałem pól poszczególnych miejscowości, na podstawie publikowanych dokumentów śląskich z XIII i XIV w. Omówiono szczegółowo sposoby powstawania przymiarków poprzez pomiary i przewłaszczenia działek. Zwrócono uwagę na ich status prawny, dewolucję do dominiów, biskupie roszczenia do pobierania z nich dziesięciny, a także powody, które mogły skłaniać podmioty sprawujące władztwo gruntowe do kwalifikowania gruntów jako przymiarków. Dzięki zachowanym mapom dla wsi Pakosławice i Górzec udało się też skonfrontować dane z dokumentów średniowiecznych z topografią i rozmierzeniem tych miejscowości przed przeprowadzeniem separacji i nowego podziału pól w latach dwudziestych XIX w.
Kształtowanie się rynku sztuki w Krakowie w XIX wieku. Wybrane aspekty badawcze
Authors: Skotniczna Ewa
Published: July 2024

Celem artykułu jest opisanie procesu formowania się rynku sztuki i antyków w Krakowie w XIX w. Choć pod względem ekonomicznym miasto nie mogło konkurować z Warszawą, już od początku tego stulecia wyróżnić można rozmaite funkcjonujące tam formy sprzedaży dzieł sztuki. W artykule opisano wybrane zjawiska charakterystyczne dla rynku sztuki w XIX w.: handel antykwaryczny, publiczne licytacje, loterie obrazowe, działalność księgarń i sklepów oferujących dzieła sztuki, a w końcu pierwsze działające w Krakowie salony sztuki. Badania oparto na analizie źródeł obejmujących: materiały archiwalne, zachowaną korespondencję, materiały prasowe oraz opracowania o charakterze pamiętnikarskim i przewodnikowym.
Wyzwania, idee i czas. Wybrane problemy z dziejów nauk medycznych
Authors: Klonder Andrzej
Published: July 2024

Recenzja
Social Media’s Influence on Public Administration
Authors: Tagoe Hellen , Zhang Mengzhong
Published: July 2024

The purpose of this research is to examine two hypotheses: 1. Social media use has a positive significant relationship with knowledge on public administration (public policies); 2. Social media use has a positive significant relationship with public political participation. The research collected quantitative data through online survey questionnaires. 238 university students from three universities have responded to the survey. This study concludes that social media has improved the participation of the public in decision making. Also, social media is seen as a viable form of communication to disseminate information on public administration related issues and has improved the communication between officials and the public effectively. Respondents also believed social media has a role to play in improving public administration with time as it could inform, educate, receive feedback, and involve the public in decision making.
PELATIHAN KEWIRAUSAHAAN DIGITAL UNTUK PENGEMBANGAN UMKM DAN MAHASISWA DI KOTA BENGKULU
Authors: Desriani Neny , Wahyudi Heru
Published: July 2024

The Fourth Industrial Revolution has transformed the global business landscape with digital technologies like the Internet of Things (IoT), Artificial Intelligence (AI), and big data, presenting challenges and opportunities for entrepreneurs, especially Micro, Small, and Medium Enterprises (MSMEs) and students in Bengkulu City. This community service program aimed to address the digitalization knowledge and skills gap among these groups by enhancing their understanding of digital entrepreneurship, developing practical digital marketing skills, and supporting MSMEs' digital transformation. The training covered six main topics: understanding entrepreneurship, contemporary entrepreneurial challenges, digital technology adoption, basics of digital media (email and Google Business), basics of digital media (social media), and introduction to Online Single Submission (OSS) for business legality. Evaluation results showed a significant increase in participants' knowledge and skills in digital marketing, social media management, and technology adoption, with most participants reporting substantial benefits and improved readiness to start and manage their businesses digitally. The program not only provided immediate benefits to the participants but also contributed to MSME development in Bengkulu City by offering a training model adaptable for future initiatives, aiming to enhance MSMEs' digital capacity and prepare students for entrepreneurial ventures.
Diskriminasi Tokoh Saraswati pada Novel "Saraswati Si Gadis dalam Sunyi" dan Tokoh Dewa pada Novel "Biola Tak Berdawai"
Authors: Amir Sitti Aisyah
Published: July 2024

AbstrakPenelitian ini bertujuan untuk membandingkan bentuk diskriminasi yang dialami tokoh Saraswati dalam novel "Saraswati Si Gadis Dalam Sunyi" karya A.A Navis dan tokoh Dewa dalam novel "Biola Tak Berdawai" karya Seno Gumira Ajidarma. Kedua novel ini dipilih untuk dikaji dan dilakukan perbandingan karena masing-masing novel memiliki tokoh penyandang disabilitas yang hidup dalam diskriminasi di masyarakat. Metode yang digunakan dalam penelitian ini menggunakan perspektif komparatif dan menggunakan pendekatan sosiologi sastra. Tujuan penelitian ini untuk mendekripsikan bentuk diskriminasi yang dialami tokoh Saraswati dalam novel "Saraswati Si Gadis dalam Sunyi" karya A.A. Navis dan tokoh Dewa dalam novel "Biola Tak Berdawai" karya Seno Gumira Ajidarma, kemudian mendeskripsikan bagaimana sikap tiap tokoh tersebut dalam mengatasi diskriminasi yang dialaminya. Hasil penelitian yang menunjukkan bentuk diskriminasi pada tiap tokoh penyandang disabilitas ini memberikan pengaruh terhadap tokoh-tokoh tersebut.Kata Kunci: sastra bandingan, diskriminasi, disabilitas, sosiologi sastraAbstractThis study aims to compare the forms of discrimination experienced by the character Saraswati in the novel "Saraswati Si Gadis dalam Sunyi" by A.A Navis and the character Dewa in the novel "Biola Tak Berdawai" by Seno Gumira Ajidarma. These two novels were chosen to be studied and compared because each novel has characters with disabilities who live in discrimination in society. The method used in this study uses a comparative perspective and uses a sociological literary approach. The purpose of this study is to describe the forms of discrimination experienced by the character Saraswati in the novel "Saraswati Si Gadis dalam Sunyi" by A.A. Navis and the character Dewa in the novel "Biola Tak Berdawai" by Seno Gumira Ajidarma, then describe how each character's attitude in overcoming the discrimination they experience. The results of the study show that there is a form of discrimination against each character with a disability in influencing these figures. Keywords: comparative literature, discrimination, disability, sociology of literature
Jejak Pendidikan Islam di Asia Tenggara: Sejarah dan Perkembangannya di Indonesia, Malaysia, Brubei, Singapura dan Thailand
Authors: Febrianti Tiara , Seprina Reka
Published: July 2024

Tujuan penelitian ditulis adalah untuk menggali dan mengkaji sejarah perkembangan Islam di negara-negara Asia Tenggara, khususnya di Indonesia, Malaysia, Brunei, Singapura, dan Thailand. Metode yang digunakan dalam jurnal ini adalah metode penelitian sejarah yang dibagi menjadi empat bagian, yaitu Heuristik, Kritik Sumber, Interpretasi, dan Historiografi. Sumber-sumber yang diperoleh dalam penelitian ini terdiri dari buku-buku dan dokumen-dokumen yang berkaitan dengan tema Pengembangan Pendidikan Islam di negara-negara Asia Tenggara. Dari hasil penelitian ditemukan bahwa sejarah perkembangan pendidikan Islam di negara-negara Asia Tenggara, khususnya di Indonesia, Malaysia, Brunei, Singapura, dan Thailand, memiliki kesamaan tersendiri. Ini dimulai dengan masuk dan menyebarnya Islam, diikuti dengan munculnya pendidikan Islam. Biasanya, pendidikan dimulai dengan kegiatan informal di masjid dan kemudian berkembang menjadi lembaga pendidikan formal.
THE IMPACT OF PICTURE PROMPTS ON STUDENTS’ ABILITY IN SUBJECT-VERB AGREEMENT: A CLASSROOM ACTION RESEARCH
Authors: Mintarsih Mintarsih , Yani Ani
Published: July 2024

This study aims to find out how the impact of picture prompts can improve the ability of seventh-grade students at SMPN 121 Jakarta regarding the use of subject-verb agreements in simple present tense sentences. Observation before action was carried out in class VII SMPN 121 Jakarta. From the data collected through observation and prerequisite tests before entering a new chapter, it is known that the students have difficulty answering subject-verb agreement questions in simple present-tense sentences. In addition, not all the students are facilitated by gadgets. For this reason, the researchers uses pictures that can be used both electronically and paper-based to encourage students' ability to subject-verb agreement. This research was conducted using the Classroom Action Research method which focused on solving the problems encountered. The use of pictures as a learning medium in English is expected to encourage the students to more easily understand the subject-verb agreement material. From the findings, reports on the student learning outcomes, and observations it can be said that the use of pictures is quite effective in improving students' ability to subject-verb agreement material in simple present tense sentences.
SISTEM INFORMASI PENJUALAN PLAY STATION DENGAN PENDEKATAN STRUKTURAL
Authors: Ardiansyah Bima , Daniati Erna , Harini Dwi
Published: July 2024

Maxima Game bergerak di bidang penjualan. Karena keterbatasan proses penjualan masih dilakukan secara manual. Penelitian ini bertujuan untuk membuat sistem informasi penjualan PlayStation berbasis web di Maxima Game, sehingga memudahkan pelanggan melakukan transaksi. Sistem ini dibangun menggunakan PHP dan MySQL. Metode waterfall yang mencakup analisis kebutuhan, desain, implementasi, verifikasi, dan pemeliharaan digunakan dalam pengembangan sistem ini. Fitur-fitur yang tersedia meliputi pendaftaran, pencarian, dan checkout. Dengan sistem ini, pelayanan menjadi lebih efisien dan efektif, serta memudahkan pemilik bisnis dalam mengelola data pemesanan. Pengembangan Sistem Informasi ini menggunakan pendektan structural. Hal ini merupakan metodologi yang berfokus pada pembagian sistem menjadi komponen-komponen yang lebih kecil dan lebih mudah dikelola. Pendekatan ini melibatkan penggunaan diagram dan alat pemodelan seperti Diagram Aliran Data (DFD), Kamus Data, dan Diagram Hubungan Entitas (ERD) untuk menggambarkan dan mendokumentasikan spesifikasi sistem. Tahapan dalam pendekatan struktural meliputi analisis kebutuhan, desain sistem, implementasi, pengujian, dan pemeliharaan.  Pendekatan ini membantu memastikan bahwa sistem informasi yang dikembangkan memenuhi kebutuhan pengguna dan dapat diandalkan dalam jangka panjang
PERANCANGAN UI/UX E-COMMERCE MENGGUNAKAN METODE USER CENTERED DESIGN (UCD)
Authors: Alja Farhan Maulana , Daniati Erna , Ristyawan Aidina
Published: July 2024

Sistem informasi saat ini sudah berkembang sangat pesat. Website Ecommerce dapat memudahkan dalam melakukan kegiata berbelanja produk secara online tanpa perlu mendatangi toko offline untuk melihat produk. Tutus Betta Farm merupakan sebuah usaha yang berfokus pada jual beli ikan cupang dan juga budidaya ikan cupang untuk dijual Kembali. Disaat banyaknya pesanan pembelian sering terjadi kesalahan dalam pencatatan pesanan, dikarenakan pencatatan masih menggunakan kertas. Pembeli juga merasa kesulitan disaat ingin melihat katalog produk yang tersedia. Untuk mengatasi hal ini, Tutus Betta Farm memerlukan perancangan design UI/UX website Ecommerce yang dapat memudahkan mengelola katalog dan pencatatan pesanan. Metode yang digunakan adalah User Centered Design (UCD) yang berfokus pada kebutuhan pengguna sistem. Diharapkan perancangan design UI/UX Ecommerce dapat membantu perancangan website sesuai dengan kebutuhan fungsionalitas pengguna.
The energy balance in a solar-powered UAV flying along the shortest path
Authors: Ailon A. ,   School of Electrical and Computer Engineering. Ben Gurion University of the Negev. Israel
Published: July 2024

The integration of solar energy into aircraft technology is an attractive and challenging topic, and there is a clear consensus regarding its potential benefits. To optimally apply solar energy, it is important to plan flight paths so that the absorbed energy will be maximal. However, in many missions of Unmanned Aerial Vehicles (UAVs), it is important, sometimes critical to plan the shortest path between two directed points (that is, initial and final positions, each with a defined direction of motion). Therefore, this article deals with combining the issues of planning the shortest route between two directed points and calculating the difference between the collected energy and the consumed energy of a solar-powered UAV when it flies along the shortest path. The article demonstrates how the energy balance depends on the geometry of the shortest path and the position of the sun in the sky, relative to the flying UAV. Key words. Solar-powered UAV, energy balance, shortest path between endpoints, level flight.