bluuebunny/crossref_metadata_2025 huggingface dataset:
ГОСТРИЙ ХОЛАНГІТ У СОБАКИ (КЛІНІЧНИЙ ВИПАДОК)
Authors: Шулешко О. , Жоріна Л. , Oліяр A. , Шулешко M.
Published: April 2024

Досліджено клінічний випадок гострого холангіту в суки породи ротвейлер віком 5,9 років. Встановлено, що для остаточного діагнозу хвороб шлунково-кишкового тракту необхідно проведення комплексного обстеження. Ефективне лікування гострого холангіту в собак можливе тільки при застосуванні якісного знеболення за допомогою спазмолітиків з одночасним використанням симптоматичної терапії. Після збору анамнезу проведено клінічний огляд, на підставі якого стан собаки визнаний як важкий з попереднім діагнозом – непрохідність кишечника та наявність у травній трубці стороннього тіла. Для його уточнення призначено додаткові обстеження: загальний та біохімічний аналіз крові, аналіз сечі, дослідження калових мас, УЗ-діагностику органів черевної порожнини, рентгенологічне дослідження кишечника в динаміці з використанням барію сульфату, діагностичну лапаротомію. Після проведення комплексного обстеження хворої собаки та отримання результатів встановлений остаточний діагноз – гострий холангіт. На етапі лікування хвороби, враховуючи стан та масу тіла, тварині призначені спазмолітики, протиблювотні, жовчогінні та сечогінні препарати, антибіотики та інтенсивна інфузійна терапія. Особлива увага приділена послабленню парентерального болю шляхом майже цілодобової інфузії розчину лідокаїну, що важливо за захворювань шлунково-кишкового тракту, повʼязаних з запальними та спазматичними процесами. Використання анальгетиків у подібних випадках полегшує страждання тварини, зменшує психологічні травми, стреси та негативні емоції, які вона відчуває під час хвороби, проведенні маніпуляцій та перебуванні в умовах стаціонару ветеринарної клініки. Після проведеного лікування собака виписана в задовільному стані, власники отримали рекомендації протягом місяця годувати тварину дієтичними кормами, що використовуються за захворювань печінки.
ПОШИРЕННЯ МАЛАСЕЗІЙНОГО ДЕРМАТИТУ У ТВАРИН РІЗНИХ ВИДІВ
Authors: Іовенко А. , Лумедзе І. , Koт С. , Найдіч О.
Published: April 2024

Дерматологічна патологія у тварин, осбливо домашніх (собаки та коти) є досить поширеною, про що свідчать дослідження різних авторів. Ліпофільні дріжджі роду Malassezia є важливими коменсалами шкіри та умовно-патогенними мікроорганізмами шкіри у різних тварин. Маласезійний дерматит або маласезіоз у тварин є достатньо поширеною дерматологічною патологією, оскільки він завжди перебігає на фоні вже існуючої первинної патології. Метою статті було вивчення поширення маласезійного дерматиту у тварин різних видів на основі огляду українських та закордонних літературних джерел. Дріжджоподібні гриби роду Malassezia поширені серед тварин різних видів: собаки, коти, червоні лисиці, дикобрази, койоти, Каліфорнійський морський лев, дикі котячі, водоплавні птахи тощо. M. sympodialis бере участь у мікробіоті слухового каналу великих котячих. Дріжджоподібні гриби роду Malassezia виділяються як від клінічно здорових тварин, так і від тварин з дерматитами та отитами. Від тварин та вододоплавних птахів виявлені різні види маласезій: Malassezia globosa, Malassezia furfur, Malassezia restricta, Malassezia sympodialis, Malassezia pachydermatis, Malassezia slooffiae.
El diseño como factor de concientización en el consumo habitual por un eco-amigable en la generación X, en Lima 2020
Authors:   , Castillo Urbina Lucía Lisbeth
Published: April 2024

El objetivo de este trabajo de investigación busca determinar de qué manera el diseño puede incorporar conciencia ambiental en los hábitos de consumo en la generación X en Lima.
Cubic Graphs with Colouring Defect 3
Authors: Karabáš Ján , Máčajová Edita , Nedela Roman , Škoviera Martin
Published: April 2024

The colouring defect of a cubic graph is the smallest number of edges left uncovered by any set of three perfect matchings. While $3$-edge-colourable graphs have defect $0$, those that cannot be $3$-edge-coloured (that is, snarks) are known to have defect at least $3$. In this paper we focus on the structure and properties of snarks with defect $3$. For such snarks we develop a theory of reductions similar to standard reductions of short cycles and small cuts in general snarks. We prove that every snark with defect $3$ can be reduced to a snark with defect $3$ which is either nontrivial (cyclically $4$-edge-connected and of girth at least $5$) or to one that arises from a nontrivial snark of defect greater than $3$ by inflating a vertex lying on a suitable $5$-cycle to a triangle. The proofs rely on a detailed analysis of Fano flows associated with triples of perfect matchings leaving exactly three uncovered edges. In the final part of the paper we discuss application of our results to the conjectures of Berge and Fulkerson, which provide the main motivation for our research.
A Generalization of the Dual Immaculate Quasisymmetric Functions in Partially Commutative Variables
Authors: Daugherty Spencer
Published: April 2024

We define a new pair of dual bases that generalize the immaculate and dual immaculate bases to the colored algebras $QSym_A$ and $NSym_A$. The colored dual immaculate functions are defined combinatorially via tableaux, and we present results on their Hopf algebra structure, expansions to and from other bases, and skew functions. For the colored immaculate functions, defined using creation operators, we study expansions to and from other bases and provide a right Pieri rule. This includes a combinatorial method for expanding colored immaculate functions into the colored ribbon basis that specializes to a new analogous result in the uncolored case. We use the same methods to define colored generalizations of the row-strict immaculate and row-strict dual immaculate functions with similar results.
Investigation of 3% Binahong (Anredera cordifolia) Leaf Extract Nanogel on the Alveolar Bone Healing: BMP-2 Modulation in Rat Models
Authors: Bernard Bernard , Syafruddin Ilyas  , Olivia Avriyanti Hanafiah
Published: April 2024

Background: Alveolar bone healing relies on osteoblasts activity and differentiation, with bone morphogenetic protein-2 (BMP-2) playing a crucial regulatory role. Binahong leaf extract (BLE) has demonstrated efficacy in bone healing due to its rich phytochemical composition. Nanogel offers enhanced bioavailability and targeted release to effectively deliver therapeutic agents. This study aims to assess the impact of 3% BLE nanogel on BMP-2 expression in tooth extraction socket healing.

Methods: Thirty male Wistar rat underwent anaesthesia for the extraction of their lower incisors to induce alveolar bone healing. Subjects were randomly assigned into treatment (BLE nanogel) and control (base nanogel) group. Five rats from each group were respectively sacrificed at 7, 14, and 28 days after procedures. BMP-2 expression was assessed by performing immunohistochemistry analysis using BMP antibody reagent. Data were analysed using chi-square.

Results: The analysis of BMP-2 expression showed no significant difference between treatment and control groups on days 7, 14, and 28 (p>0,05). However, a subtle increase was observed in the treatment group throughout observation period.

Conclusion: Application of 3% BLE nanogel may enhance the expression of BMP-2, even though it was not significantly increase. The findings underscore the complex interplay between Binahong leaf extract, nanogel and BMP-2 expression.
Students' and teachers' perceptions of English Day program: A case at an Acehnese School
Authors: Tathahira Tathahira , Nahrisya Sriayu
Published: April 2024

This study investigated the perceptions of students and teacher toward the implementation of English Day program. The study took place at SMAS Insan Madani, Meukek Sub-district, South Aceh District, Aceh, Indonesia. English Day is a program commonly conducted in most integrated schools in Indonesia which aims to promote students English speaking activities. The study used qualitative research methods, collecting data from interview. Participants of the study included four students and one teacher involved in English Day program. The results of the study showed that English Day was quite an enjoyable learning environment for the students to practice English. Still, the students felt sometimes discouraged due to some psychological factors. Nevertheless, the teacher had been supportive in the program and also provided necessary feedback for the students.
Lecturers� questioning strategies in English speaking class
Authors: Cerlya Cerlya , Nisa Rahmatun , Safura Siti
Published: April 2024

The purpose of this study was to investigate the questioning strategies employed by lecturers in English speaking class. The study used a descriptive method. The participants in this study were two English lecturers who taught English Speaking skills and ten students from English Department at Universitas Muhammadiyah Aceh, Aceh Province. Data were collected by means of interview and questionnaire. The obtained data were examined by analyzing the transcription of the interview and the questionnaire responses. This study found that lecturers utilized a variety of questioning strategies, including procedural, divergent, probing, specific, and open-ended questions. Lecturers employed questioning strategies in the English classroom by asking questions at the start of the teaching and learning process and after providing the learning materials.
Hazai közterületi videomegfigyelő rendszerek állapota és fejlesztési lehetőségei
Authors: Tóth Levente
Published: April 2024

Aim: The purpose of this study is to provide comprehensive and structured knowledge about the state and development opportunities of domestic public video surveillance systems.Methodology: The author conducted a comprehensive study in this qualitative and quantitative analysis-based research, focusing on the planning, operation, and management aspects of public video surveillance systems in Hungary. To achieve this, they conducted a questionnaire-based survey in the county seats of the country as well as in the 23 districts of Budapest.Findings: The extent of system deployment, operating conditions, as well as supervision and usage methods vary from county to county and district to district. The use of various image analysis software is negligible compared to the possibilities.Value: The comprehensive survey, which provides an insight into the prevalence of domestic surveillance systems, is a crucial and missing element in Hungarian literature. The research results highlight numerous development opportunities in the operation of surveillance video surveillance systems.
Probing 3D Magnetic Fields Using Thermal Dust Polarization and Grain Alignment Theory
Authors: Hoang Thiem , Truong Bao
Published: April 2024

Magnetic fields are ubiquitous in the Universe and are thought to play an important role in various astrophysical processes. Polarization of thermal emission from dust grains aligned with the magnetic field is widely used to measure the 2D magnetic field projected onto the plane of the sky, but its component along the line of sight is not yet constrained. Here, we introduce a new method to infer 3D magnetic fields using thermal dust polarization and grain alignment physics. We first develop a physical model of thermal dust polarization using the modern grain alignment theory based on the magnetically enhanced radiative torque alignment theory. We then test this model with synthetic observations of magnetohydrodynamic simulations of a filamentary cloud with our updated POLARIS code. Combining the tested physical polarization model with synthetic polarization, we show that the B-field inclination angles can be accurately constrained by the polarization degree from synthetic observations. Compared to the true 3D magnetic fields, our method based on grain alignment physics is more accurate than the previous methods that assume uniform grain alignment. This new technique paves the way for tracing 3D B-fields using thermal dust polarization and grain alignment theory and for constraining dust properties and grain alignment physics.
Latitude-dependent Atmospheric Waves and Long-period Modulations in Luhman 16 B from the Longest Light Curve of an Extrasolar World
Authors: Fuda Nguyen , Apai Dániel , Nardiello Domenico , Tan Xianyu , Karalidi Theodora , Bedin Luigi Rolly
Published: April 2024

In this work, we present the longest photometric monitoring of up to 1200 hr of the strongly variable brown dwarf binaries Luhman 16 AB and provide evidence of ±5% variability on a timescale of several to hundreds of hours for this object. We show that short-period rotational modulation around 5 hr (k = 1 wavenumber) and 2.5 hr (k = 2 wavenumber) dominate the variability under 10 hr, where the planetary-scale wave model composed of k = 1 and k = 2 waves provides good fits to both the periodograms and light curve. In particular, models consisting of three to four sine waves could explain the variability of the light-curve durations up to 100 hr. We show that the relative range of the k = 2 periods is narrower compared to the k = 1 periods. Using simple models of zonal banding in solar system giants, we suggest that the difference in period range arises from the difference in wind-speed distribution at low and mid-to-high latitudes in the atmosphere. Last, we show that Luhman 16 AB also exhibits long-period ±5% variability, with periods ranging from 15 hr up to 100 hr over the longest monitoring of this object. Our results for the k = 1 and k = 2 waves and long-period evolution are consistent with previous 3D atmosphere simulations, demonstrating that both latitude-dependent waves and slow-varying atmospheric features are potentially present in Luhman 16 AB atmospheres and are a significant contribution to the light-curve modulation over hundreds of rotations.
Radiation Process in Relativistic MHD Waves: The Case of Circularly Polarized Alfvén Waves
Authors: Goto Ryota , Asano Katsuaki
Published: April 2024

Turbulence in highly magnetized plasma can be relativistic and induce an electric field comparable to the background magnetic field. Such a strong electric field can affect the emission process of nonthermal electrons. As the first step toward elucidating the emission process in relativistic turbulence, we study the radiation process of electrons in relativistic circularly polarized Alfvén waves. While the induced electric field boosts the average energy of low-energy electrons with a Larmor radius smaller than the wavelength, the emissivity for such electrons is suppressed because of the elongated gyromotion trajectory. The trajectory of high-energy electrons is shaken by the small-scale electric field, which enhances the emissivity. Since the effective Lorentz factor of E × B drift is

≃

2

in the circularly polarized Alfvén waves, the deviation from the standard synchrotron emission is not so prominent. However, a power-law energy injection in the waves can produce a concave photon spectrum, which is similar to the GeV extra component seen in GRB spectra. If the turbulence electric field is responsible for the GeV extra component in GRBs, the estimates of the typical electron energy and magnetic field should be largely altered.
The Sun Remains Relatively Refractory Depleted: Elemental Abundances for 17,412 Gaia RVS Solar Analogs and 50 Planet Hosts
Authors: Rampalli Rayna , Ness Melissa K. , Edwards Graham H. , Newton Elisabeth R. , Bedell Megan
Published: April 2024

The element abundances of stars, particularly the refractory elements (e.g., Fe, Si, and Mg), play an important role in connecting stars to their planets. Most Sun-like stars do not have refractory abundance measurements since obtaining a large sample of high-resolution spectra is difficult with oversubscribed observing resources. In this work we infer abundances for C, N, O, Na, Mn, Cr, Si, Fe, Ni, Mg, V, Ca, Ti, Al, and Y for solar analogs with Gaia Radial Velocity Spectrometer (RVS) spectra (R = 11,200) using TheCannon, a data-driven method. We train a linear model on a reference set of 34 stars observed by Gaia RVS with precise abundances measured from previous high-resolution spectroscopic efforts (R > 30,000–110,000). We then apply this model to several thousand Gaia RVS solar analogs. This yields abundances with average upper limit precisions of 0.04–0.1 dex for 17,412 stars, 50 of which are identified planet (candidate) hosts. We subsequently test the relative refractory depletion of these stars with increasing element condensation temperature compared to the Sun. The Sun remains refractory depleted compared to other Sun-like stars regardless of our current knowledge of the planets they host. This is inconsistent with theories of various types of planets locking up or sequestering refractories. Furthermore, we find no significant abundance differences between identified close-in giant planet hosts, giant planet hosts, and terrestrial/small planet hosts with the rest of the sample within our precision limits. This work demonstrates the utility of data-driven learning for future exoplanet composition and demographics studies.
Winds and Disk Turbulence Exert Equal Torques on Thick Magnetically Arrested Disks
Authors: Manikantan Vikram , Kaaz Nicholas , Jacquemin-Ide Jonatan , Musoke Gibwa , Chatterjee Koushik , Liska Matthew , Tchekhovskoy Alexander
Published: April 2024

The conventional accretion disk lore is that magnetized turbulence is the principal angular momentum transport process that drives accretion. However, when dynamically important large-scale magnetic fields thread an accretion disk, they can produce mass and angular momentum outflows, known as winds, that also drive accretion. Yet, the relative importance of turbulent and wind-driven angular momentum transport is still poorly understood. To probe this question, we analyze a long-duration (1.2 × 105
r

g
/c) simulation of a rapidly rotating (a = 0.9) black hole feeding from a thick (H/r ∼ 0.3), adiabatic, magnetically arrested disk (MAD), whose dynamically important magnetic field regulates mass inflow and drives both uncollimated and collimated outflows (i.e., winds and jets, respectively). By carefully disentangling the various angular momentum transport processes within the system, we demonstrate the novel result that disk winds and disk turbulence both extract roughly equal amounts of angular momentum from the disk. We find cumulative angular momentum and mass accretion outflow rates of

L

̇

∝

r

0.9

and

M

̇

∝

r

0.4

, respectively. This result suggests that understanding both turbulent and laminar stresses is key to understanding the evolution of systems where geometrically thick MADs can occur, such as the hard state of X-ray binaries, low-luminosity active galactic nuclei, some tidal disruption events, and possibly gamma-ray bursts.
Deriving X-Ray Line Profiles for Massive-star Winds from Momentum-conserving Dynamical Working Surface Solutions
Authors: Gunderson Sean J. , Gayley Kenneth G.
Published: April 2024

We present a general procedure for deriving a line-profile model for massive-star X-ray spectra that captures the dynamics of the wind more directly. The basis of the model is the analytic solution to the problem of variable jets in Herbig–Haro objects given by Cantó et al. In deriving our model, we generalize this jet solution to include flows with a prescribed nonzero acceleration for the context of radiatively driven winds. We provide example line profiles generated from our model for the case of sinusoidal velocity and mass-ejection variations. The example profiles show the expected shape of massive-star X-ray emission lines, as well as interesting but complicated trends with the model parameters. This establishes the possibility that observed X-rays could be a result of temporal variations seeded at the wind base, rather than purely generated intrinsically within the wind volume, and can be described via a quantitative language that connects with the physical attributes of those variations, consistently with the downstream momentum-conserving nature of radiatively cooled shocked radial flows.
Simulating X-Ray Reverberation in the Ultraviolet-emitting Regions of Active Galactic Nuclei Accretion Disks with Three-dimensional Multifrequency Radiation Magnetohydrodynamic Simulations
Authors: Secunda Amy , Jiang 姜 Yan-Fei 燕飞 , Greene Jenny E.
Published: April 2024

Active galactic nuclei (AGN) light curves observed with different wave bands show that the variability in longer wavelength bands lags the variability in shorter wavelength bands. Measuring these lags, or reverberation mapping, is used to measure the radial temperature profile and extent of AGN disks, typically with a reprocessing model that assumes X-rays are the main driver of the variability in other wavelength bands. To demonstrate how this reprocessing works with realistic accretion disk structures, we use 3D local shearing box multifrequency radiation magnetohydrodynamic simulations to model the UV-emitting region of an AGN disk, which is unstable to the magnetorotational instability and convection. At the same time, we inject hard X-rays (>1 keV) into the simulation box to study the effects of X-ray irradiation on the local properties of the turbulence and the resulting variability of the emitted UV light curve. We find that disk turbulence is sufficient to drive intrinsic variability in emitted UV light curves and that a damped random walk model is a good fit to this UV light curve for timescales >5 days. Meanwhile, X-ray irradiation has negligible impact on the power spectrum of the emitted UV light curve. Furthermore, the injected X-ray and emitted UV light curves are only correlated if there is X-ray variability on timescales >1 day, in which case we find a correlation coefficient r = 0.34. These results suggest that if the opacity for hard X-rays is scattering dominated as in the standard disk model, hard X-rays are not the main driver of reverberation signals.
Promoting black oat and ryegrass growth via Azospirillum brasilense inoculation after corn and soybean crop rotation
Authors: Cunha Vinícius dos Santos , Brum Marcos da Silva , Soares André Brugnara , Deak Evandro Ademir , Speth Léo Antônio Limberger , Martin Thomas Newton
Published: April 2024

Inadequate management of nitrogen fertilization, due to high costs, compromises the nutrition and productivity of winter forage plants, highlighting the need to adopt sustainable alternatives, such as using nitrogen-fixing bacteria. This research evaluated the growth promotion of black oat (Avena strigosa) and ryegrass (Lolium multiflorum) plants inoculated with Azospirillum brasilense rhizobacteria. The experiments were carried out over two consecutive harvests in Santa Maria, Brazil. The sowing density was 300 viable seeds per square meter for black oats and 100 viable seeds per square meter for ryegrass. A dose of 5 ml per kg of seeds from the consortium was used as an inoculant. Following sowing, the seeds were incorporated into the soil through light harrowing. At the beginning of tillering, 50 kg of N ha-1 was applied to create treatments with and without nitrogen. Plant emergence, plant height, number of leaves and tillers were evaluated. In the first year, an inoculation response was observed for the number of black oat plants emerged m-2. In the second year (corn residue), an inoculation response was observed for the number of leaves and height of black oats. Under soybean straw for oat leaf number and ryegrass tiller number. The current research highlights the effectiveness of inoculation with Azospirillum brasilense in promoting significant improvements in the morphological components of forage crops. Following corn, an increase in the number of leaves and tillers was observed, as well as in the height of black oats. Similarly, following soybeans, there was an increase in the number of black oat tillers and the number of ryegrass leaves. The results emphasize the importance of inoculation as an effective practice to enhance crop development and performance in agricultural systems, improving sustainability and productivity under soybean and corn residues.
Risk factors for progressing to critical illness in patients with hospital-acquired COVID-19
Authors: Lee Kyung-Eui , Lee Jinwoo , Lee Sang-Min , Lee Hong Yeul
Published: April 2024

Background/Aims: Risk factors for progression to critical illness in hospital-acquired coronavirus disease 2019 (COVID-19) remain unknown. Here, we assessed the incidence and risk factors for progression to critical illness and determined their effects on clinical outcomes in patients with hospital-acquired COVID-19.Methods: This retrospective cohort study analyzed patients admitted to the tertiary hospital between January 2020 and June 2022 with confirmed hospital-acquired COVID-19. The primary outcome was the progression to critical illness of hospital- acquired COVID-19. Patients were stratified into high-, intermediate-, or low-risk groups by the number of risk factors for progression to critical illness.Results: In total, 204 patients were included and 37 (18.1%) progressed to critical illness. In the multivariable logistic analysis, patients with preexisting respiratory disease (OR, 3.90; 95% CI, 1.04–15.18), preexisting cardiovascular disease (OR, 3.49; 95% CI, 1.11–11.27), immunocompromised status (OR, 3.18; 95% CI, 1.11–9.16), higher sequential organ failure assessment (SOFA) score (OR, 1.56; 95% CI, 1.28–1.96), and higher clinical frailty scale (OR, 2.49; 95% CI, 1.62–4.13) showed significantly increased risk of progression to critical illness. As the risk of the groups increased, patients were significantly more likely to progress to critical illness and had higher 28-day mortality.Conclusions: Among patients with hospital-acquired COVID-19, preexisting respiratory disease, preexisting cardiovascular disease, immunocompromised status, and higher clinical frailty scale and SOFA scores at baseline were risk factors for progression to critical illness. Patients with these risk factors must be prioritized and appropriately isolated or treated in a timely manner, especially in pandemic settings.
Cassava cultivation; current and potential use of agroindustrial co–products
Authors: Andrés–Meza Pablo , Aguilar–Rivera Noé , Meneses–Márquez Isaac , Luis Del Rosario–Arellano José , Ivette Bolio–López Gloria , Raúl Leyva–Ovalle Otto
Published: April 2024

Cassava (Manihot esculenta Crantz) has garnered global attention due to its importance as a crucial raw material for ethanol and other derivative production. Nonetheless, its agroindustry generates a substantial amount of residues. We examined the potential utilization of co–products from both agricultural and industrial sectors concerning starch extraction processes. A total of 319 million tons of fresh cassava roots are globally produced, yielding up to 55% of agricultural co–products during harvesting. For every ton of starch extracted, 2.5 tons of bagasse, along with 100 to 300 kg of peel per ton of fresh processed cassava, and 17.4 m3 of residual liquid tributaries are generated. Consequently, both solid agricultural biomass and solid/liquid residues could be directed towards cogenerating bioenergy such as bioethanol, biobutanol, biodiesel, bio–oil, charcoal, and other bioproducts. In conclusion, the conversion of cassava agroindustrial co–products into food and non–food products with high added value could be promoted, thus fostering a circular economy to enhance profitability, sustainability, and crop promotion.
Utilizing Schaefer's fixed point theorem in nonlinear Caputo sequential fractional differential equation systems
Authors: Awadalla Muath , Murugesan Manigandan , Kannan Manikandan , Alahmadi Jihan , AlAdsani Feryal
Published: April 2024

In the present study, established fixed-point theories are utilized to explore the requisite conditions for the existence and uniqueness of solutions within the realm of sequential fractional differential equations, incorporating both Caputo fractional operators and nonlocal boundary conditions. Subsequently, the stability of these solutions is assessed through the Ulam-Hyers stability method. The research findings are validated with a practical example that corroborate and reinforce the theoretical results.
An inverse source problem for a pseudoparabolic equation with memory
Authors: Huntul M. J. , Khompysh Kh. , Shazyndayeva M. K. , Iqbal M. K.
Published: April 2024

This paper is devoted to investigating the well-posedness, as well as performing the numerical analysis, of an inverse source problem for linear pseudoparabolic equations with a memory term. The investigated inverse problem involves determining a right-hand side that depends on the spatial variable under the given observation at a final time along with the solution function. Under suitable assumptions on the problem data, the existence, uniqueness and stability of a strong generalized solution of the studied inverse problem are obtained. In addition, the pseudoparabolic problem is discretized using extended cubic B-spline functions and recast as a nonlinear least-squares minimization of the Tikhonov regularization function. Numerically, this problem is effectively solved using the MATLAB subroutine lsqnonlin. Both exact and noisy data are inverted. Numerical results for a benchmark test example are presented and discussed. Moreover, the von Neumann stability analysis is also discussed.
Criteria of existence and stability of an n-coupled system of generalized Sturm-Liouville equations with a modified ABC fractional derivative and an application to the SEIR influenza epidemic model
Authors: Aly Elkhateeb S. , Almalahi Mohammed A. , Aldwoah Khaled A. , Shah Kamal
Published: April 2024

The primary objective of this study was to explore the behavior of an n-coupled system of generalized Sturm-Liouville (GSL) and Langevin equations under a modified ABC fractional derivative. We aimed to analyze the dynamics of the system and gain insights into how this operator influences the conditions for the existence and uniqueness of solutions. We established the existence and uniqueness of solutions by employing the Banach contraction principle and Leray-Schauder's alternative fixed-point theorem. We also investigated the Hyers-Ulam stability of the system. This analysis allows us to understand the stability properties of the solutions and evaluate their sensitivity to perturbations. Furthermore, we employed Lagrange's interpolation polynomials to produce a numerical scheme for the influenza epidemic model. By combining theoretical analysis, mathematical principles, and numerical simulations, this study contributes to enriching our understanding of the behavior of the system and offers insights into its dynamics and practical applications in epidemiology.
Les maisons d’architecte en Région de Bruxelles-Capitale (1830-1970)
Authors: Voorde Stephanie Van de , Raaffels Linsy , Wee Barbara Van der , Bertels Inge
Published: April 2024

Les maisons d’architecte constituent une catégorie de logements à part, qui revêtent une signification particulière en tant que « carte de visite » de l’architecte, projet expérimental, aboutissement ou synthèse de l’ensemble de son œuvre, englobant des caractéristiques stylistiques, géographiques, techniques, sociales et autres. Toutefois, afin de saisir pleinement l’importance et la valeur ajoutée de ce genre architectural, il est essentiel de disposer d’un cadre théorique et typologique bien défini pour comprendre les maisons d’architecte. Sur la base des données recueillies à partir d’inventaires et de documents existants, de recherches dans les archives et de visites sur le terrain, un vaste registre dans lequel sont recensées 370 maisons d’architecte de la Région de Bruxelles-Capitale a été établi, qui constitue le point de départ de l’analyse. Ce registre se concentre sur la période de 1830 à 1970, au cours de laquelle la construction de maisons d’architecte et de logements en général s’est intensifiée. Il comprend des maisons d’architecte emblématiques et célèbres, ainsi que des exemples moins connus, dans des proportions à peu près égales : nombre de ces édifices n’étaient pas répertoriés auparavant et peuvent désormais être qualifiés à juste titre de maisons d’architecte. Témoignant de la diversité de ces maisons, le registre constitue la base indispensable pour apprécier de manière approfondie les différents cas, ainsi que la maison d’architecte en tant que type de bâtiment particulier.
Produire pour un auteur. Ethnographie du studio d’un artiste contemporain
Authors: Hassine Rafaëlle
Published: April 2024

À partir d’une enquête ethnographique réalisée au sein du studio d’un plasticien reconnu internationalement, à la tête d’une équipe d’assistants, cet article analyse la division et l’organisation du travail de conception et de production des œuvres d’art contemporain. Il interroge la manière dont les artistes et autres travailleurs en studio parviennent à produire des créations uniques, partageant des qualités visuelles et matérielles associées à un même auteur.
Œuvres d’art ou vandalismes ? Légitimité et appropriations artistiques
Authors: Bessette Anne
Published: April 2024

Cet article propose d’examiner les conditions qui ont participé à rendre envisageable, pour certains artistes, de concevoir des propositions créatrices sous forme de modification d’œuvres existantes. Il s’avère instructif d’examiner le traitement différencié des réutilisations d’œuvres dans une démarche créative, d’analyser les spécificités des modifications considérées comme « recevables » et des actes condamnés en tant que vandalisme. Cela invite à questionner les conditions auxquelles une action artistique est qualifiée de vandalisme.
Usages et apports des méthodes mixtes dans une recherche sociologique sur les inégalités de genre dans l’art contemporain
Authors: Provansal Mathilde
Published: April 2024

À partir d’une enquête sociologique sur les inégalités de genre dans l’art contemporain, cet article interroge les usages et les apports des méthodes mixtes dans le processus de production de connaissance sociologique. Après avoir présenté la problématique et l’objet de cette recherche pour appréhender la pertinence du pluralisme méthodologique, l’article souligne comment la combinaison des approches qualitatives et quantitatives permet de développer des résultats de recherche originaux.
Shine bright. Vetro e (un po’ di) ceramica invetriata a Venezia e nelle aree limitrofe tra VI e XI secolo
Authors: Ferri Margherita
Published: April 2024

La prima parte dell’intervento riguarda una disamina di vecchi e nuovi dati derivati dalle ricerche condotte dall’Università Ca’ Foscari Venezia con il fine di sintetizzare quanto noto su produzione e consumo degli oggetti in vetro a Venezia e aree limitrofe tra V e XI secolo. Si tratta di un periodo particolarmente avaro di rinvenimenti e quanto emerso dagli scavi di Jesolo, Torcello, San Francesco del Deserto, San Lorenzo d’Ammiana, San Pietro in Castello, Santa Maria e Donato a Murano, Sant’Ilario di Mira costituisce un buon punto di partenza per descrivere il consumo di oggetti in vetro nei secoli di formazione della città. A seguire viene proposto un breve stato dell’arte sulle produzioni ceramiche invetriate altomedievali (CVP e CVS) nel medesimo areale e periodo. L’articolo sviluppa maggiormente la trattazione dei dati relativi alla produzione vitrea. Il ricorso al modello proposto per la produzione della ceramica invetriata in monocottura si mostra fondamentale per mettere a confronto queste due categorie di oggetti e evidenziare un possibile sostrato comune in cui questi manufatti trovano utilizzo e diffusione.
Influence of Alumina, Ferric Oxide, and Mn as Composites on the Properties of Recycled Aluminium Alloy
Authors: Srinath P. , Bhagyanathan C. , Melwyn J. Gottmyers , Sathiya Seelan G. , Santhosh Kumar C.
Published: April 2024

Recycling of aluminium alloys is gaining significant attention due to its economic and environmental benefits. However, close loop recycled aluminium alloys can be adversely affected by impurities and alloying elements present in the recycled feedstock. In this study, the influence of three composites, namely alumina (Al2O3), ferric oxide (Fe2O3), and manganese (Mn), on the properties of recycled aluminium taldon scraps was investigated to enhance the tensile behaviour of the alloys. The effects of these composites on the mechanical properties, microstructure, and corrosion behaviour of the recycled aluminium alloys were evaluated through experimental characterization techniques. The results showed that the addition of these composites had a significant influence on the properties of recycled aluminium alloys, providing insights into the potential for improving the performance of recycled aluminium alloys through composite additions. The addition of Al2O3 enhanced the tensile strength by 44.18 % and the variation can be attributed to the strengthening of the dendritic zones by the formation of α-Al.
Study on the Performance Behaviour of Fibre Reinfored Foam Concrete
Authors: Dhanalakshmi Ayyanar , Shahul Hameed Masthan Ali , Jeyaseela J. , Karthika S.
Published: April 2024

In the construction sector, concrete is indispensable. Non-structural uses account for a significant portion of concrete production. Foamed concrete (FC) is incredibly porous, and as the number of voids increases, the material's thermal characteristics decrease. Since these uses need a substantial amount of concrete, researching them might yield useful information for optimizing concrete's material efficiency and making better use of its waste products. FC is excellent in compression but poor in tension because it creates multiple microcracks. FC cannot withstand the tensile stress induced by the applied forces without additional reinforcement elements. Hence, this research investigates the mechanical properties of polypropylene (PP) fibers based foam concrete. The utilization of effective materials such as cement, flyash, silica fume and PP fibre were used in this investigation. In this study, a novel invention is proposed for designing and strength prediction of foam concrete and find out the strength properties such as compressive strength, split tensile strength and flexural strength of fibre reinforced foam concrete were determined and the experimental and predictive value of compressive strength were also determined with the help of python. The results provide a clear idea of ​​the efficient use of fly ash and silica fume for the manufacture of light weight based products that promote profitability, sustainability and entrepreneurship for youth in developing countries such as India, and it is important by conserving natural resources through savings in the consumption of cement and aggregates.
Application of Artificial Intelligence in the Process of Adsorption Purification of Isobutane, Isobutylene and Benzene from Impurities
Authors: Guliyeva Sevinj , Yusubov Fakhraddin , Alieva Narmina
Published: April 2024

The article is devoted to mathematical modeling and fuzzy logic in controlling the process of adsorption purification of isobutane and isobutylene from impurities. The article also conducted research on the production of high-purity isobutane and isobutylene from the isobutane-isobutylene fraction of pyrolysis gas. A method has been developed for increasing the purity of isobutane and isobutylene fractions isolated from pyrolysis gas using sulfuric acid. It is proposed to introduce adsorption units into the plant technological scheme for separating the hydrocarbons isobutane and isobutylene from the C4 fraction of pyrogas, with the help of which it has been proven to obtain isobutane and isobutylene hydrocarbons of high purity up to 99.9%. The processes of selecting adsorbents for the additional purification of the isobutane fraction from isobutylene impurities were also studied and activated carbon of the AP-3 grade was selected, and for the additional purification of the isobutylene fraction from impurities of normal butylene’s, CaA zeolite was selected. The main reactions have been studied and a mathematical model of the processes for producing pure isobutylene and isobutane has been developed, taking into account recycling; also, artificial intelligence (AI) has been used when selecting adsorbents to optimize the processes of purifying the pyrolysis gas fraction of isobutane and isobutylene from impurities.
Method for Reducing Fuel Consumption when Roasting Pellets from Magnetite Iron Ore Concentrate
Authors: Azimova Lala , Mirbabayeva Naila
Published: April 2024

The main directions of the economic and social development of the Republic of Azerbaijan envisage technical re-equipment in the ferrous metallurgy industry based on the wide application of progressive scientific and technical achievements. Here, an important place is given to the creation of new resource-saving technological processes and highly efficient equipment. The most important task of increasing the efficiency of obtaining iron from ore materials is to reduce the consumption of metal and energy. It is important to significantly reduce waste and losses during iron ore production by improving the quality of iron ore logs. The task set in the work is related to the conditions of production and remelting of iron ore logs in an electric furnace. Instead of melting metal waste in metallurgical plants, the steels obtained from the melting of metal logs with 95-97% iron content obtained from iron ore by one end processing method are economically very efficient and important issue for the Republic. The implementation of these important national economic issues is possible by solving the processes of drying and burning of iron ore logs, complex optimization, taking into account the limiting factors of the process of choosing rational temperature regimes and the practical application of the obtained results in the industry. The article belongs to the section "Metallurgical Heat Engineering".
Synthesis and Fabrication of Luminescence of CsPbBr3/PAN Nanocomposite Fiber
Authors: De Yonarosa Taras Genovievo , Pramata Azzah Dyah , Hutomo Farhan Aryo , Susanti Diah
Published: April 2024

Perovskite semiconductor have gained increasing attention in the recent years. However, pristine halide perovskites often faces bottle-neck related to low their stability. Herein, for the first time synthesis and fabrication of CsPbBr3/PAN fiber composite with electrospinning method is reported. CsPbBr3 quantum dots (QDs) embedded PAN fiber were successfully fabricated based on the XRD and FTIR test result. The result demonstrates electrospun fiber stable for over than one week in the condition of being immersed in water. The CsPbBr3 QDs was synthesized by Ligand Assisted Reprecipitation Process (LARP) method. The average particle size of our CsPbBr3 particle sizes ranging from 80 to 240 nm. Our findings reveal that the effect of variations between toluene and acetone had an effect on the size of the fiber and the intensity of photoluminescence reduction of the CsPbBr3/PAN fiber composite. Which is the smallest fiber and the lowest reduction intensity belongs to the 4:1 variation, namely with a fiber size of a 727.56 nm and a percentage decrease in intensity of 66,67%.
Synthesis of Acid-Based Fly Ash Geopolymer with Pure Phosphoric Acid Compare with P-Leachate Activator
Authors: Mkhonto Euricia , Mashifana Tebogo , Sithole Nastassia Thandiwe
Published: April 2024

Acid-based geopolymers (ABG) have gained attention as eco-friendly alternatives to Ordinary Portland cement. This study synthesized ABG by activating fly ash with commercial H3PO4 and an alternative P leachate from sewage sludge. The ABG was synthesized at different molar concentrations of 4M, 6M, 8M, 10M, and 12M, while P-leachate geopolymer (PFA) was synthesized with liquid/solid ratios of 0.2-0.5. The unconfined compressive strength (UCS) was used to measure the geopolymer performance, which was also studied using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The P concentration was higher than the alternative P source; however, the Al concentration was low, resulting in a lower UCS compared to ABG FA. ABG FA activated with 8M reported a UCS of 11.53 MPa. The strength of ABG FA was attributed to the Si-O-P-O-Si, (PO4)5-, (AlO4)5, and Al-O-Si networks and the participation of H2PO4-in geopolymerization. The PFA exhibited the formation of a Si-O-Al-O-P unit and a P-O vibration band, and the microstructure was composed of cenospheres covered with some minor gelatinous particles.
Integral Role of Surface and Living Anatomy in Medical Education
Authors: Tennakoon Varuni
Published: April 2024

No abstract available
The clinical implications of single umbilical artery: A case report and multifaceted review
Authors: McCully B. , Dodampahala S. H. , Menon A. S. , D’Sa N. , Day E. , Ahmed M.
Published: April 2024

A single umbilical artery (SUA) is a notable anomaly in fetal development, characterized by the absence of one umbilical artery. This condition, detectable through routine ultrasound screening as early as the 12th week of gestation, raises significant obstetric and perinatal considerations. Despite its prevalence, the pathogenesis of SUA remains largely idiopathic, potentially indicating intrinsic anomalies that may be associated with chromosomal and congenital abnormalities in up to 50% of cases3. This paper aims to discuss the nature of SUA, including its historical context, diagnostic approach, evolutionary significance, and implications for antenatal care, focusing on optimizing outcomes through a collaborative, patient-centric care model.
Effects of focal muscle vibration on cervical pain in Parkinson’s disease patients: a pilot study
Authors: Ronconi Gianpaolo , Gatto Dario Mattia , Ariani Mariantonietta , Codazza Sefora , Panunzio Maurizio , Coraci Daniele , Ferrara Paola Emilia
Published: April 2024

Musculoskeletal pain is a common symptom of Parkinson's disease (PD) that is not adequately treated with current dopaminergic drugs. This pilot study sought to investigate the effect of focal muscle vibration (fMV) on a group of Parkinson's disease patients suffering from chronic cervical pain. In addition to conventional physiotherapy, twenty-two patients with idiopathic Parkinson's disease (Hoehn and Yahr stages II-III) received three weeks of bilateral focal musclevibration to the trapezius muscles. The Visual Analogue Scale (VAS), the Short-form McGill, and the Present PainIntensity scales were used to assess pain at baseline (T0), after three weeks of treatment (T1), one week after the last treatment session (T2), and three weeks after T2 (T3). Pain intensity decreased significantly from baseline to T1 across all pain scales (p < 0.0001). Furthermore, the beneficial effect of fMV on cervical pain lasted up to one month after treatment. Our findings show that fMV, in combination with conventional physiotherapy, is effective at reducing pain intensity in PD patients, with results visible even after a month of follow-up.