bluuebunny/crossref_metadata_2025 huggingface dataset:
A Case Study of the Temporal Evaluation of the Urban Heat Island (UHI) Effect: Impacts on Water Availability and Air Quality of Dhaka City
Authors: Rahman Md. Hasanur , Islam A.K.M. Saiful , Shampa Shampa
Published: April 2024

Dhaka is the capital and largest city of Bangladesh; it is the world’s
seventh most densely populated city and is often regarded as the world’s
most densely populated built-up urban region. This city has experienced
a significant increase in the urban heat island (UHI) effect, and
temperatures are currently several degrees higher than in the
surrounding urban areas. The existing UHI-based studies in the context
of Dhaka city have still not addressed the statistical relationship
between UHI and several indicators (individually), such as water
availability, air quality, and vegetation index. This study intends to
investigate urban heat patterns and their associated changes by
developing UHI maps from 2013 to 2023. To generate the maps, we are
evaluating UHI using land surface temperature (LST) data extracted from
USGS Landsat 8 OLI images. The first objective of this study is to
examine the temporal evolution of urban heat in Dhaka using the
developed UHI map to identify trends, patterns, and hotspots. The second
objective is to explore the relationship between air quality, urban
heat, water availability, and vegetation index of Dhaka city. The
findings of this study show that due to UHI, urban heat increased by
nearly 6°C in Dhaka city. This study also found that NO
(Nitrogen Dioxide) and O (Ozone) have positive
correlations with Dhaka’s UHI, whereas NDVI (Normalized Difference
Vegetation Index) and NDWI (Normalized Difference Water Index) have
negative correlations. The study will be insightful for sustainable
urban planning and environmental management by better understanding the
above-mentioned complex relationship and help to develop an enhanced
understanding of Dhaka’s urban heat dynamics and their influence on
water availability and air quality. Additionally, the outcomes will be
helpful for policymakers to increase resilience to minimize the adverse
effect of UHI in quickly rising cities like Dhaka.
An All-in-One Rapid Prediction of Ground Motion Intensity Measures Hybrid Network for Multi-Task in The North-South Seismic Belt of China
Authors: Zhao Qingxu , Rong Mianshui , Zhang Bin , LI Xiaojun
Published: April 2024

The north-south seismic belt of China poses a high risk of earthquakes,
necessitating the need for accurate and rapid prediction of intensity
measures (IMs) to prevent and mitigate potential damage. We have
developed a new multi-task model, CRAQuake, to predict IMs for the
north-south seismic belt of China. Using initial arrival seismic waves
recorded at a single station as input, CRAQuake simultaneously predicts
six IMs without relying on pre-configured parameters such as earthquake
source, path, and location. The model was trained on 4281 sets of strong
motion records datasets at 822 stations and tested to show highly
correlated results with the target IMs. The prediction performance
continues to improve as the input initial arrival seismic wave time
window increases. CRAQuake promises to enhance the accuracy and
timeliness of IMs prediction in the north-south seismic belt of China.
Comparative Analysis of TEC Prediction Models During Geomagnetic Storm and Quiet Conditions Using Diffusion, Transformer, and SARIMA
Authors: Yuan Yuhuan , Xia Guozhen , Zhang Xinmiao
Published: April 2024

Total Electron Content (TEC) of the ionosphere under fluctuating
geomagnetic conditions plays a pivotal role in space-based communication
and navigation systems. Periods of geomagnetic storms have a significant
effect on the ionospheric TEC, thereby impacting the precision of Global
Navigation Satellite Systems (GNSS) as well as other communication
systems. This study evaluates the performance of three predictive
models: Diffusion, Transformer, and Seasonal Autoregressive Integrated
Moving Average (SARIMA) by forecasting TEC during different geomagnetic
storm conditions. Diffusion model predicts by simulating the random
processes that govern ionospheric variability, and SARIMA model relies
on statistical principles to emulate seasonality, trend, and
autocorrelation structure within data. Our study uses TEC and
geomagnetic data to differentiate between storm and quiet periods,
evaluating each model’s predictive accuracy in these distinct scenarios.
Performance was benchmarked against the Center for Orbit Determination
in Europe’s (C1PG) 1-day ahead ionospheric forecasts. This study
specifically concentrated on the performance of the prediction models
within a singular grid cell located at the exact geographical
coordinates of 114.3° E longitude and 30.5° N latitude. The study
indicates that all three models exhibit exceptional forecasting
abilities during both geomagnetic storm and quiet periods.
Significantly, Diffusion Model surpasses the others, achieving an
outstanding 85.64\% of its predictions within the
high-correlation interval ranging from 0.95 to 1.00 during quiet
geomagnetic periods, while the C1PG model records 51.66%. Otherwise,
during strong geomagnetic storm periods, Diffusion model operates at a
75.41% accuracy rate, while the C1PG achieves a 71.77% accuracy rate.
Buoyancy Modes in a Low Entropy Bubble
Authors: Toffoletto Frank R. , Wolf Richard Alan , Derr Jason
Published: April 2024

In the nightside region of Earth’s magnetosphere, buoyancy modes have
been associated with low entropy bubbles. These bubbles form in the
plasma sheet, particularly during substorm expansion, and move rapidly
earthward and come to rest in the inner plasma sheet or inner
magnetosphere. They often exhibit damped oscillations with periods of a
few minutes and have been associated with Pi2 pulsations. In previous
work, we used the thin filament approximation to compare the frequencies
and modes of buoyancy waves using three approaches: magnetohydrodynamic
(MHD) ballooning theory, classic interchange theory, and an idealized
formula. Interchange oscillations differ from the more general MHD
oscillations in that they assume a constant pressure on each magnetic
field line. It was determined that the buoyancy and interchange modes
are very similar for field lines that extend into the plasma sheet but
differ for field lines that map to the inner magnetosphere. In this
paper, we create a small region of entropy depletion in an otherwise
stable entropy background profile of the magnetotail to represent the
presence of a plasma bubble and determine the properties of the buoyancy
modes using the same 3 approaches. In the bubble region, we find that in
some regions the interchange and buoyancy modes overlap resulting in
frequencies that are much lower than the background. In other regions
within the bubble, we find interchange unstable modes while in other
locations MHD normal mode predicts an MHD slow mode wave solution which
is not found in the pure interchange solution.
How Phase Transitions Impact Changes in Mantle Convection Style Throughout Earth’s History: From Stalled Plumes to Surface Dynamics
Authors: Li Ranpeng , Dannberg Juliane , Gassmoeller Rene , Lithgow-Bertelloni Carolina , Stixrude Lars
Published: April 2024

Mineral phase transitions can either hinder or accelerate mantle flow.
In the present day, the formation of the bridgmanite + ferropericlase
assemblage from ringwoodite at 660 km depth has been found to cause weak
and intermittent layering of mantle convection. However, for the higher
temperatures in Earth’s past, different phase transitions could have
controlled mantle dynamics.We investigate the potential changes in convection style during Earth’s
secular cooling using a new numerical technique that reformulates the
energy conservation equation in terms of specific entropy instead of
temperature. This approach enables us to accurately include the latent
heat effect of phase transitions for mantle temperatures different from
the average geotherm, and therefore fully incorporate the thermodynamic
effects of realistic phase transitions in global-scale mantle convection
modeling. We set up 2-D models with the geodynamics software ASPECT,
using thermodynamic properties computed by HeFESTo, while applying a
viscosity profile constrained by the geoid and mineral physics data and
a visco-plastic rheology to reproduce self-consistent plate tectonics
and Earth-like subduction morphologies.Our model results reveal the layering of plumes induced by the
wadsleyite to garnet (majorite) + ferropericlase endothermic transition
(between 420–600 km depth and over the 2000–2500 K temperature range).
They show that this phase transition causes a large-scale and
long-lasting temperature elevation in a depth range of 500–650 km depth
if the potential temperature is higher than 1800 K, indicating that
mantle convection may have been partially layered in Earth’s early
history.
Pressure dependence of permeability in cracked rocks: experimental evidence of non-linear pore-pressure gradients from local measurements
Authors: Lin Gang , Chapman Samuel , Garagash Dmitry , Fortin Jérôme , Schubnel Alexandre
Published: April 2024

Understanding the coupling between rock permeability, pore pressure, and
fluid flow is crucial, as fluids play an important role in the Earth’s
crustal dynamics. We measured the distribution of fluid pressure during
fluid-flow experiments on two typical crustal lithologies, granite and
basalt. Our results demonstrate that the pore-pressure distribution
transitions from a linear to a non-linear profile as the imposed
pore-pressure gradient is increased (from 2.5 MPa to 60 MPa) across the
specimen. This non-linearity results from the effective pressure
dependence of permeability, for which two analytical formulations were
considered: an empirical exponential and a new micromechanics-based
model. In both cases, the non-linearity of pore pressure distribution is
well predicted. However, using a compilation of permeability vs.
effective pressure data for granites and basalts, we show that our
micromechanics-based model, which combines the rough crack asperity
model and cubic law theories, outperforms the exponential formulation at
low effective pressures.
Electromagnetic Detection of ELF/VLF Signals Emitted by Geminids 2017 Meteors
Authors: Aghelpasand Samaneh , Howaida Parvin , Ahadi Mehran
Published: April 2024

Skywatchers have been fascinated by ’meteors’ radiant glow for years.
Early reports show that the sounds of these luminous meteors have been
recorded, a rare occurrence due to ’sound’s slower speed compared to
light. Astronomers studying meteors suggest that ionized tails can
produce electromagnetic waves and their investigations show it is in ELF
and VLF bands, causing nearby metal objects to vibrate and create
audible sounds, known as the Electrophonic effect. These waves travel at
the speed of light, confirmed by various measurements. This study
details the detection of such signals during the 2017 Geminids meteor
shower using a loop antenna and SuperSID monitor, distinguishing signals
from local and natural noise. Factors affecting data recording are also
discussed. These findings shed light on an overlooked aspect of meteor
observations, guiding future research in this field.
A Physics-Enhanced Neural Network for Estimating Longitudinal Dispersion Coefficient and Average Solute Transport Velocity in Porous Media
Authors: Meng Yinquan , Jiang Jianguo , Wu Jichun , Wang Dong
Published: April 2024

Dispersion coefficients and the average solute transport velocity are
pivotal for groundwater solute transport modeling. Accurately and
efficiently determining these parameters is challenging due to
difficulties in directly correlating them with pore-space structure. To
address this issue, we introduced the Physics-enhanced Convolutional
Neural Network-Transformer (PhysenCT-Net), an innovative model designed
to concurrently estimate the longitudinal dispersion coefficient and
average solute transport velocity in three-dimensional porous media.
PhysenCT-Net exhibited excellent predictive performance on unseen
testing datasets and significantly reduced computational demands.
Comprehensive evaluations confirmed its robust generalization across
various flow conditions and pore structures. Notably, the longitudinal
dispersion coefficient predictions closely align with established
empirical relationships involving flow velocity, affirming the model’s
physical interpretability and potential to aid in simulating transport
phenomena in porous media.
The Early Pathogenesis of Diabetic Retinopathy and Its Attenuation by Sodium–Glucose Transporter 2 Inhibitors
Authors: Yamato Mayumi , Kato Nao , Yamada Ken-ichi , Inoguchi Toyoshi
Published: April 2024

The early pathogenetic mechanism of diabetic retinopathy (DR) and its treatment remain unclear. Therefore, we used streptozotocin-induced diabetic mice to investigate the early pathogenic alterations in DR and the protective effect of sodium–glucose cotransporter 2 (SGLT2) inhibitors against these alterations. Retinal vascular leakage was assessed by dextran fluorescence angiography. Retinal thickness and vascular leakage were increased 2 and 4 weeks after onset of diabetes, respectively. Immunostaining showed that morphological change of microglia (amoeboid form) was observed at 2 weeks. Subsequently, increased angiopoietin-2 expression, simultaneous loss of pericytes and endothelial cells, decreased vessel density, retinal hypoxia, and increased vascular endothelial growth factor (VEGF)-A/VEGF receptor system occurred at 4 weeks. SGLT2 inhibitors (luseogliflozin and ipragliflozin) had a significant protective effect on retinal vascular leakage and retinal thickness at a low dose that did not show glucose-lowering effects. Furthermore, both inhibitors at this dose attenuated microglia morphological changes and these early pathogenic alterations in DR. In vitro study showed both inhibitors attenuated the lipopolysaccharide-induced activation of primary microglia, along with morphological changes toward an inactive form, suggesting the direct inhibitory effect of SGLT2 inhibitors on microglia. In summary, SGLT2 inhibitors may directly prevent early pathogenic mechanisms, thereby potentially playing a role in preventing DR.

Article Highlights
Depletion of TBC1D4 Improves the Metabolic Exercise Response by Overcoming Genetically Induced Peripheral Insulin Resistance
Authors: Springer Christian , Binsch Christian , Weide Deborah , Toska Laura , Cremer Anna L. , Backes Heiko , Scheel Anna K. , Espelage Lena , Kotzka Jörg , Sill Sebastian , Kurowski Anette , Kim Daebin , Karpinski Sandra , Schnurr Theresia M. , Hansen Torben , Hartwig Sonja , Lehr Stefan , Cames Sandra , Brüning Jens C. , Lienhard Matthias , Herwig Ralf , Börno Stefan , Timmermann Bernd , Al-Hasani Hadi , Chadt Alexandra
Published: April 2024

The Rab-GTPase–activating protein (RabGAP) TBC1D4 (AS160) represents a key component in the regulation of glucose transport into skeletal muscle and white adipose tissue (WAT) and is therefore crucial during the development of insulin resistance and type 2 diabetes. Increased daily activity has been shown to be associated with improved postprandial hyperglycemia in allele carriers of a loss-of-function variant in the human TBC1D4 gene. Using conventional Tbc1d4-deficient mice (D4KO) fed a high-fat diet, we show that moderate endurance exercise training leads to substantially improved glucose and insulin tolerance and enhanced expression levels of markers for mitochondrial activity and browning in WAT from D4KO animals. Importantly, in vivo and ex vivo analyses of glucose uptake revealed increased glucose clearance in interscapular brown adipose tissue and WAT from trained D4KO mice. Thus, chronic exercise is able to overcome the genetically induced insulin resistance caused by Tbc1d4 depletion. Gene variants in TBC1D4 may be relevant in future precision medicine as determinants of exercise response.

Article Highlights
Timing of moderate-to-vigorous physical activity, mortality, cardiovascular disease, and microvascular disease in adults with obesity
Authors: Sabag Angelo , N. Ahmadi Matthew , Postnova Svetlana , A. Cistulli Peter , Fontana Luigi , Stamatakis Emmanuel
Published: April 2024

Objective To assess the association between timing of aerobic moderate-to-vigorous physical activity (MVPA) and risk of cardiovascular disease (CVD), microvascular disease (MVD), and all-cause mortality in adults with obesity, and a subset with obesity and type 2 diabetes (T2D). Research Design and Methods Participants included adults with obesity (body mass index [BMI] >30kg/m2), and a subset with T2D, from the UK Biobank accelerometry sub-study. Aerobic MVPA was defined as bouts lasting ≥3 continuous minutes. Participants were categorised into Morning, Afternoon, or Evening MVPA based on when they undertook the majority of their aerobic MVPA. The reference group included participants with an average of <1aerobic MVPA bout/day. Analyses were adjusted for potential confounders. Results The core sample included 29,836 adults with obesity and a mean age of 62.2 (standard deviation [SD] 7.7) years. Over a mean follow-up of 7.9 (SD 0.8) years, 1,425 deaths, 3,980 CVD events, and 2,162 MVD events occurred. Compared to the reference group, Evening MVPA was associated with the lowest risk of mortality (hazard ratio [HR]=0.39 [95% confidence interval [CI]:0.27,0.55]), whereas Afternoon (HR=0.60[95%CI:0.51,0.71]) and Morning MVPA (HR=0.67[95%CI:0.56,0.79]) demonstrated significant but weaker associations. Analogous patterns were observed for CVD and MVD incidence, with Evening MVPA being associated with the lowest risk for CVD (HR=0.64[95%CI:0.54,0.75]), and MVD (HR=0.76[95%CI:0.63,0.92]). Findings were similar in the T2D subset (n=2,995). Conclusions Aerobic MVPA bouts undertaken in the evening were associated with the lowest risk of mortality, CVD, and MVD. Timing of physical activity may play a role in future obesity and T2D management.
Aprovechamiento de residuos de la hortaliza de ajo (Allium sativum L.) y cebolla (Allium cepa L.), para el desarrollo de un sazonador bajo en sodio
Authors: Mendez-Trujillo Vianey , Ramos-Romero Martha , Gonzalez-Mendoza Daniel , Navarro-Ibarra María , Reyes-Pavon Diana
Published: April 2024

La revaloración de residuos agrícolas representa una fuente de generación de nuevos productos con alto contenido de compuestos bioactivos y bajo contenido de sodio que puede contribuir a la reducción del consumo de este elemento por la población. De tal forma que el objetivo del presente estudio fue evaluar el contenido antioxidante, cantidad de sodio y compuestos fenólicos de tres sazonadores comerciales con un sazonador vegetal formulado a base de residuos de ajo/cebolla. Los resultados evidenciaron que fue posible realizar la formulación de un sazonador empleando cascaras de ajo y cebolla deshidratadas por 24 h a 50 °C.  Las cuales fueron molidas a 300 micras y mezcladas en proporción de 60 g de polvo de ajo con 40 g de polvo de cebolla. Este sazonador luego se comparó con tres fórmulas comerciales. El análisis del sazonador a base de ajo/cebolla presentó valores significativamente menores de sodio (60 mg/ 100 g) y de NaCl (4,7 %) comparado con los tres sazonadores comerciales que mostraron valores de sodio (137 mg/ 100 g; 69 mg/100 g y 237 mg/100 mg, respectivamente) y de NaCl (54,8 %, 33 % y 70 %, respectivamente).  En contraste, los valores de proteínas, compuestos fenólicos y actividad antioxidante mostraron valores significativamente mayores comparados a los sazonadores comerciales. Finalmente, nuestro estudio muestra, la generación de una formulación de un sazonador bajo en sodio y con valores importantes de compuestos bioactivos, con una tecnología accesible a productores. Lo cual permite generar alternativas viables de revalorización de las cascaras de ajo y cebolla, fomentando un manejo sustentable de los mismos. Futuros estudios deberán identificar el efecto de extractos de esta mezcla, en la inhibición de enzimas relacionadas con la presión arterial. Lo cual contribuiría a la incorporación de este producto en el desarrollo de aditivos con bajo aporte de sodio a la población.
Incidencia del Teletrabajo en la Cultura Organizacional considerando la situación sanitaria dada por el COVID-19
Authors: Alegría Triguero Hellen Katiuska , Herrera Castro Sara
Published: April 2024

El COVID-19 desencadenó una pandemia mundial generando graves afecciones en la salud de la población y también serias consecuencias económicas, como forma de reactivación económica se implementó el teletrabajo para continuar laborando y salvaguardando la salud de las personas. El presente artículo titulado Incidencia del Teletrabajo en la Cultura Organizacional considerando la situación sanitaria dada por el COVID-19, busco describir la incidencia de las variables, cuyo objetivo fue determinar la correlación de las variables teletrabajo y cultura organizacional. Se aplicó metodología de tipo cuantitativa, describiendo los hallazgos. El grupo objetivo de la investigación estuvo conformado por la población económicamente activa de la ciudad de Guayaquil, para describir la incidencia de las variables Teletrabajo y COVID-19. La muestra fue de 207 personas, a quienes se aplicó de manera online, un cuestionario de preguntas cerradas, herramienta que fue estructurada en base al Modelo de Denison. Los resultados encontrados demuestran que existe una relación moderada entre las variables teletrabajo y cultura organizacional, la nueva modalidad implementada a nivel mundial como aquellas de teletrabajo, las cuales han transformado culturalmente diferentes modalidades que han obligado a poner en práctica nuevas organizaciones, en la que además la implementación de la tecnología juega un papel muy importante. Concluyendo que no sería posible implementar el teletrabajo si no se tiene una cultura organizacional fomentada con fuertes características y valores necesarios para la implementación de la misma.
Universidad-formación-desarrollo local. Aproximación desde el Grupo Municipal de Formación de Formadores para el desarrollo local
Authors: Rojas Murillo Anamarys , Lazo Fernández Yurien , García González Maryuri
Published: April 2024

El surgimiento del GMFFDL se sustenta en la necesidad de la formación para aportar conocimientos actualizados y perfeccionar el proceso de formación de formadores para el desarrollo local, lo que conlleve a generar nuevas alternativas para la transformación en el territorio. 

Se fortalecen los nexos de este grupo con las estructuras municipales y las entidades del territorio, ya que así se influye en el mejoramiento de la formación de formadores para el desarrollo local, facilitando un compromiso social responsable con la tarea a desarrollar, afianzando su lugar y papel en la formación. 

Lo anterior es muestra de que se diseña a tono con las realidades del quehacer cotidiano en los diferentes contextos, dado que su contribución está dirigida a todos los agentes del territorio para que sean portadores de conocimientos renovadores; máxime cuando el país hace un llamado reflexivo al fomento del desarrollo local, siendo responsabilidad de cada territorio el aportar nuevas prácticas y transmitir aprendizajes creativos.
Significance of Experiments in Inquiry-based Science Teaching
Authors: Kotsis Konstantinos T.
Published: April 2024

Inquiry-based science teaching (IBST) has garnered considerable interest in recent years due to its ability to improve students’ comprehension of scientific ideas and procedures. Experiments are crucial in IBST since they are key instruments for promoting inquiry, investigation, and discovery in the classroom. This research thoroughly analyses the importance of experiments in IBST, focusing on how they encourage active involvement, critical thinking, and better conceptual comprehension in students. This study highlights the many advantages of experiments in IBST using theoretical frameworks, empirical research, and practical insights. It also provides advice for effectively implementing them in educational practice.
PENGARUH MODEL PROBLEM BASED LEARNING TERHADAP KETERAMPILAN BERPIKIR KRITIS SISWA
Authors: Andini Dwi Septi , , Supentri , Arianto Jumili
Published: April 2024

Penelitian ini Mengacu pada hasil pra-riset dan wawancara dengan guru Pendidikan Pancasila di SMA Negeri 1 Sentajo Raya, siswa kelas XI sebenarnya aktif dalam pembelajaran, namun kendalanya siswa masih kurang mampu untuk berpikir secara kritis dalam menganalisis dan mengemukakan pendapat dengan bahasa sendiri dari hasil analisisnya. Banyak keadaan yang memicu rendahnya keterampilan berpikir kritis siswa, salah satunya ialah kurang cocoknya model pembelajaran yang diterapkan dalam kegiatan pembelajaran. Tujuan dalam penelitian ini yaitu apakah ada pengaruh model Problem Based Learning terhadap keterampilan berpikir kritis siswa. Instrument pengumpulan data dalam penelitian ini yaitu lembar observasi siswa, lembar observasi guru, Pretest dan posttest, serta teknik dokumentasi. Pengolahan data menggunakan IBM SPSS Version 25. Analisis penelitian ini menggunakan uji prasyarat normalitas, uji homogenitas, uji T, dan uji N-Gain.  Hasil olah data didapat thitung = 2.497, pada taraf signifikasi 5% diperoleh ttabel = 1,671. Maka dapat disimpulkan bahwa model pembelajaran berbasis masalah Problem Based Learning (PBL) berpengaruh tehadap keterampilan berpikir kritis siswa. Hasil uji N-Gain kelas eksperimen dalam klasifikasi sedang dengan skor 0,4129 dan kelas kontrol memperoleh skor 0.2694 dengan kategori rendah. Berdasarkan hasil N-Gain tersebut dapat dilihat bahwa model Problem Based Learning (PBL) lebih efektif untuk meningkatkan keterampilan berpikir kritis siswa dari pada menggunakan model konvensional atau ceramah.
Las armas en Persas de Esquilo
Authors: Encinas Reguero María del Carmen
Published: April 2024

Persas de Esquilo dibuja una clara oposición entre persas y griegos en función del arma que los caracteriza, el arco y la lanza respectivamente. Esas armas implican formas de combatir distintas y, además, se asocian a connotaciones y valores contrapuestos. Esquilo utiliza la mención de las armas en los diferentes contextos, entre otras cosas, para enfatizar los valores esenciales de la cultura griega al tiempo que apunta tácitamente a la ignominia de la derrota de los persas y, sobre todo, de Jerjes.
Política y religión en Antígona: una perspectiva lingüística
Authors: Pérez Lambás Fernando
Published: April 2024

El objetivo del presente artículo es analizar la novela The First Woman escrita por Jennifer Nansubuga Makumbi, en el contexto de los feminismos indígenas. En ella, la protagonista descubre el “estado original” de las mujeres que le relata Nsuuta, la bruja de la aldea. Antes del patriarcado, las mujeres eran libres como cuerpos acuáticos, sin forma, inconstantes y sin domesticar. Este estado original ha sido suprimido debido a los siglos de dominación masculina, pero el mwenkanonkano (la forma en que la autora nombra al feminismo local) está presente en la vida de muchas mujeres que desafían la discriminación a diario con su mera existencia y la forma en la que viven sus vidas. Nsuuta, representando oralmente los mitos que rodean a la feminidad y pasando el testigo de estas historias a Kirabo, las rescribe y legitimiza en su contexto, Uganda. De esta forma, concluyo que Makumbi verbaliza la necesidad de un feminismo interseccional que tome en consideración las experiencias vitales de aquellas mujeres que estaban y están alzando la voz desde la (in)comodidad de sus hogares. La autora demuestra lo esenciales que son estos testimonios que se han subestimado, ya que son ejemplos poderosos de supervivencia femenina en una sociedad dominada por dos fuerzas entrelazadas: la falocracia y el colonialismo.
A ação das palavras na Electra de Sófocles
Authors: Silva Rafael Guimarães Tavares da
Published: April 2024

Os estudos tradicionais dedicados à tragédia Electra, de Sófocles, enfatizaram uma dicotomia entre os longos discursos lúgubres de Electra, sobretudo na primeira metade da peça, e a eficiência das ações executadas por Orestes para levar a cabo o desenlace da trama. Buscando apoio em comentadores contemporâneos dessa obra, que têm destacado a dimensão performativa de certos atos de fala aí existentes, pretendo revisitar essa discussão a fim de suscitar uma nova possibilidade de consideração sobre o papel desempenhado por Electra na peça. A interpretação aqui aventada pretende dar conta de certas estranhezas do texto trágico, sugerindo uma melhor compreensão de detalhes da cena em que Clitemnestra é assassinada, bem como da conclusão aparentemente amoral avançada pela forma como a peça se encerra, sem que o matricídio pareça ter quaisquer consequências nefastas (como é o caso nas versões que Ésquilo e Eurípides propõem desse mesmo incidente mítico).
La Theanó di Michele Coniata fra παίγνιον erudito e rivelazioni ispirate
Authors: Carrozza Marco
Published: April 2024

Il presente contributo si propone di approfondire, sulla scia di studi già personalmente condotti, ulteriori sfaccettature di un epillio tardo-bizantino poco noto (Michele Coniata, Theanó), eppure estremamente interessante sia sotto il profilo letterario che sotto quello più latamente culturale. In particolar modo ci soffermeremo su due sezioni del poema, ovvero il proemio e la rivelazione ispirata della (neo)pitagorica Theanó, annunciata, non a caso, fin dal principio del poemetto. Per esigenze di accessibilità al testo e alla traduzione da noi fornita, i versi presi in esame sono riportati come appendice al presente contributo.
La heterogeneidad laboral como contracara de la acumulación: un análisis del empleo minero desde la Escuela de la Regulación
Authors: Funes Eliana Gabriela
Published: April 2024

En los primeros años del presente milenio se instalaron en la provincia de San Juan grandes proyectos mineros metalíferos, que responden a nuevas lógicas de acumulación basadas en la explotación intensiva de recursos naturales. Apoyándose en marcos legales forjados al calor de las reformas neoliberales de la década de 1990, se garantizó una amplia gama de beneficios, entre los que se cuentan las relaciones de trabajo “flexibles”. En el presente trabajo se analizará, a partir de la categoría Relación Social del Trabajo, la incidencia de esta actividad en el sector trabajo de la economía provincial, tanto en términos cuantitativos como cualitativos, desde su instalación en el año 2003 hasta 2022, poniendo en tensión la política estatal orientada a la atracción de inversores con el objeto manifiesto de generar puestos de trabajo y desarrollo para la provincia. Se intenta reflejar la forma en la que distintos mecanismos de organización de la fuerza de trabajo que impone el capital minero, y que devienen de tendencias del gran capital global, implican flexibilización, heterogeneización y precariedad en una parte importante del empleo generado por la actividad minera en la provincia.
Para adentrarse en la complejidad de la desigualdad
Authors: Alonso Firmarini Francisco Martín
Published: April 2024

Reseña de Gasparini, Leonardo (2022). Desiguales. Una guía para pensar la desigualdad económica. La Plata: Edhasa.
El arbolado del deportivo Reynosa, inventario para diseño de plan de manejo
Authors: Arriaga Rincón Laura , Chacalo Hilu Alicia
Published: April 2024

Las ciudades o centros urbanos son ecosistemas abiertos, completamente modificados y adaptados por y para el ser humano. Uno de los elementos más importantes son los árboles, seres vivos con gran capacidad de resiliencia que brindan numerosos servicios ambientales, paisajísticos y sociales. El deportivo Reynosa fue creado en 1968 como parte del conjunto de instalaciones deportivas para el entrenamiento de los atletas olímpicos y desde ese entonces a la fecha, brinda espacios para la práctica de diferentes deportes en sus instalaciones. Debido a la importancia e impacto que este tiene en la comunidad, surgió la inquietud de conocer la calidad y diversidad de su arbolado ya que es parte importante del diseño y funcionalidad de sus espacios.
Marco metodológico para el análisis de las unidades formales de paisaje y patrimonio. Caso de estudio: Zona Metropolitana de Pachuca, Hidalgo, México
Authors: Sánchez Roldán María Elena
Published: April 2024

La actual zona metropolitana de Pachuca está configurada por siete municipios que son Pachuca de Soto, Mineral del Monte, Mineral de la Reforma, Epazoyucan, Zempoala, San Agustín Tlaxiaca y Zapotlán de Juárez. Debido a que en algunos de estos municipios se detectó la existencia de minerales como la obsidiana y la plata, la región ha sido habitada y explotada tanto por grupos nativos, como por inmigrantes y exploradores externos, que han considerado ese territorio muy valioso, lo cual ha quedado registrado en varios documentos emitidos desde el siglo XVI, en los que se informa principalmente a la corona española y a países europeos acerca de sus características y elementos con valor. Sin embargo, estos informes no fueron difundidos entre sus habitantes primigenios, lo que a través del tiempo ha derivado en que la población actual tenga poco conocimiento acerca de los elementos de valor que se encuentran presentes en su territorio. Por lo que se pretende mostrar el procedimiento utilizado para obtener información relevante, que permitirá entender el desarrollo que vivió el territorio de la zona de estudio, así como mostrar evidencias históricas que permiten verificar datos, que dan fe de estos hechos, a través de la definición de las Unidades Formales de Paisaje y Patrimonio que se identifican del análisis realizado en la Zona Metropolitana de Pachuca de Soto, Hidalgo, México, lo que permitirá ofrecer herramientas para la planificación del territorio, así como permitir establecer criterios y acciones que se podrán utilizar para mejorar la calidad paisajística de la ciudad.
Comparing data mining methods for predicting cost construction projects: A case study of cost management datasets from Thailand
Authors: Chaitongrat Tanayut , Janthachai Kridtsada , Kusonkhum Wuttipong , Boonchai Paranee , Ikhwali M. Faisi , Khotdee Mathinee
Published: April 2024

This research examines three data mining approaches employing cost management datasets from 391 Thai contractor companies to investigate the predictive modeling of construction project failure with nine parameters. Artificial neural networks, naive bayes, and decision trees with attribute selection are some of the algorithms that were explored. In comparison to artificial neural network’s (91.33%) and naive bays’ (70.01%) accuracy rates, the decision trees with attribute selection demonstrated greater classification efficiency, registering an accuracy of 98.14%. Finally, the nine parameters include: 1) planning according to the current situation; 2) the company’s cost management strategy; 3) control and coordination from employees at different levels of the organization to survive on the basis of various uncertainties; 4) the importance of labor management factors; 5) the general status of the company, which has a significant effect on the project success; 6) the cost of procurement of the field office location; 7) the operational constraints and long-term safe work procedures; 8) the implementation of the construction system system piece by piece, using prefabricated parts; 9) dealing with the COVID-19 crisis, which is crucial for preventing project failure. The results show how advanced data mining approaches can improve cost estimation and prevent project failure, as well as how computational methods can enhance sustainability in the building industry. Although the results are encouraging, they also highlight issues including data asymmetry and the potential for overfitting in the decision tree model, necessitating careful consideration.
Ecological city concept: Challenge and future research agenda in urban ecology perspective
Authors: Mayona Enni Lindia , Sutriadi Ridwan
Published: April 2024

Cities are no longer viewed as creatures with a linear-climax-established cycle but as ecosystems with dynamic and complicated processes, with people as the primary component. Thus, we must understand urban ecology’s structure and function to create urban planning and appreciate the mechanisms, dynamics, and evolution that connect human and ecological processes. The ecological city (ecocity) is one of the city conceptions that has evolved with the perspective of urban ecology history. The concept of ecocity development within urban ecology systems pertains to recognizing cities as complex ecosystems primarily influenced by human activities. In this context, individuals actively engage in dynamic problem-solving approaches to address environmental challenges to ensure a sustainable and satisfactory quality of life for future generations. Therefore, it is necessary to study how ecocity has developed since it was initiated today and how it relates to the urban ecology perspective. This study aims to investigate the progression of scholarly publications on ecocity research from 1980 to 2023. Additionally, it intends to ascertain the trajectory of ecological city research trends, establish connections between scientific concepts, and construct an ecological city science network using keyword co-occurrence analysis from the urban ecology perspective. The present study used a descriptive bibliometric analysis and literature review methodology. The data was obtained by utilizing the Lens.org database, was conducted using the VOS (Visualization of Similarities) viewer software for data analysis. The urban ecology research area ecology of cities can be studied further from density visualization of ecosystem services and life cycle assessment. Finally, the challenges and future agenda of ecocity research include addressing humans by modeling functions or processes that connect humans with ecosystems (ecology of cities), urban design, ecological imperatives, integration research, and improving the contribution to environmental goals, spatial distribution, agriculture, natural resources, policy, economic development, and public health.
In-Situ Wettability Analysis of Al Coating Influence on Hot-Dip Galvanizing Properties of Advanced High-Strength Steels
Authors: Grandhi Srinivasulu , Jin Kwang-Hyeok , Kim Min-Su , Yoon Dong-Joo , Lee Seung-Hyo , Oh Min-Suk
Published: April 2024

We investigated the influence of steel surface properties on the wettability of zinc (Zn). Our main objective is to address the selective oxidation of solute alloying elements and enhance the wetting behavior of Zn on advanced high strength steel (AHSS) by employing an aluminum (Al) interlayer through the physical vapor deposition technique. The deposition of an Al interlayer resulted in a decrease in contact angle and an increase in spread width as the molten Zn interacted with the Al interlay on the steel substrate. Importantly, the incorporation of an Al interlayer demonstrated a significant improvement in wettability by substantially increasing the work of adhesion compared to the uncoated AHSS substrate.
Evaluation of Electropolishing Characteristics of 316L Stainless Steel Tube in Contaminated Electrolyte
Authors: Jung Woo-Chul , Yang Hyunseok , Choi Seon-Jin , Kong Man-Sik
Published: April 2024

In the electropolishing process, the polishing quality of the metal surface varies according to the contamination of the electrolyte. In this study, the electrolyte was evaluated according to the usage time, and the effect of each factor on electropolishing was investigated. As the electrolyte is contaminated, the concentration of metal ions in the electrolyte increases and the ion conductivity decreases. In addition, the pH and specific gravity of the electrolyte increase due to the metal sludge formed as the metal ion concentration increases. When the electrolyte usage time was more than 5 days, many scratches remained on the surface of 316L stainless steel, and relatively high surface roughness was measured. The surface roughness improvement rate compared to the initial specimen was 30% for the unused electrolyte, 26% on the 3rd day, 19% on the 5th day, and 17.5% on the 13th day. Since the low current density due to electrolyte contamination causes a decrease in polishing efficiency, initial scratches on the metal surface still exist on the polished surface. Therefore, it is necessary to manage the electrolyte to maintain the quality of electropolishing.
Evaluation of Classification Possibility of Coke Breeze by Drag Force
Authors: Lee Ji-A , Jin Bong-Min , Han Jeong-Whan
Published: April 2024

Sintered ore used as blast furnace burden materials is produced by mixing iron ore, coke, and limestone, then burning the coke and sintering the iron ore with the combustion heat. Among the coke charged, A particle size of 0.25 mm or less has an insignificant effect as a heat source and adhere to the surface of other materials to inhibit the reaction between oxygen and raw materials, thereby decreasing the quality of sintered ore. Therefore, to increase combustion efficiency, it is necessary to reduce the ratio of coke breeze in the charged coke. In this study, theoretical calculation, experiment and simulation were conducted to investigate the possibility of size classification by drag force in the process of dropping coke after being transported through a belt conveyor. The height of belt conveyor was at 1m, and velocity of the belt was 1.5, 2.3, and 2.6 m/s, which were considered as experimental variables. After falling, the distribution of coke particle size according to the horizontal travel distance was confirmed, and a fall trajectory prediction formula model was created through the drag model of polydisperse system and compared with the experimental and analysis results.
Microstructure Evolution Through Cryogenic Rolling of Ultra-High Purity Titanium Produced by Electron Beam Melting
Authors: Ko Ui Jun , Han Byoung Jun , Park Kyoung-Tae , Ebrahimian Marzieh , Kim Jh
Published: April 2024

In this study, crystal grain refinement of pure titanium manufactured by electron beam melting through cryogenic rolling was performed. The effect of rolling in a cryogenic atmosphere on average grain size was investigated. Cryogenic atmosphere rolling was confirmed to be smaller than normal temperature rolling. Electron back scatter diffraction (EBSD) confirmed the presence of oriented crystal grains in the material. The deformation, temperature, and stress generated during rolling were calculated using 3D simulation. Finite element analysis (FEM) modeling was used to analyze the trend of average grain size change during the heat treatment of the rolled samples.
A Glimpse into Raw Material Management in the Early Iron Age: Bronze Ingots from a Production Settlement in Wicina (Western Poland) in Archaeometallurgical Research
Authors: Garbacz-Klempka A. , Dzięgielewski K. , Wardas-Lasoń M.
Published: April 2024

Assessing the level of metallurgical and foundry technology in prehistoric times requires the examination of raw material finds, including elongated ingots, which served as semi-finished products ready for further processing. It is rare to find such raw material directly at production settlements, but Wicina in western Poland is an exception. During the Hallstatt period (800-450 BC), this area, situated along the middle Oder River, benefited from its favorable location in the heart of the Central European Urnfield cultures and developed networks for raw material exchange and bronze foundry production. Numerous remnants of casting activities, such as clay casting molds, casting systems, and raw materials, have been discovered at the Wicina settlement. This article aims to provide an archaeometallurgical interpretation of raw material management and utilization by prehistoric communities during the Early Iron Age. To achieve this, a collection of 31 ingots from the defensive settlement in Wicina, along with two contemporary deposits from Bieszków and Kumiałtowice, both found within a 20 km radius of the stronghold, were studied. Investigations were conducted using a range of methods, including optical microscopy(OM), scanning electron microscopy (SE M), energy-dispersive X-ray spectroscopy (SE M-EDS), X-ray fluorescence spectroscopy (ED-XRF), powder X-ray diffraction (PXRD), AAS and ICP-OES spectrometer. The significance of ingots is examined in the context of increasing social complexity and the rising popularity of bronze products, which necessitated diversified production and a demand for raw materials with different properties and, consequently, different chemical compositions.
Investigation on Mechanical Properties of MAR-M247 Superalloy for Turbine Blades by Experiment and Simulation
Authors: Lin Hao , Geng Haipeng , Zhou Xifeng , Song Leiming , Hu Xiaojun
Published: April 2024

This study aimed to investigate the metallographic structure and the impact of the heat treatment process on the MAR-M247 superalloy, a high-temperature nickel-based superalloy commonly used in turbine blades. The heat treatment process can potentially influence the mechanical properties of the MAR-M247 superalloy at different temperatures. A strength simulation analysis of gas turbine blades should include the variations in the mechanical properties of the material. The effect of heat treatment on grain size was investigated by metallographic experiments, and numerical calculations of material mechanical properties were conducted. The mechanical property parameters necessary for finite element analysis of turbine blades were determined. Finally, a finite element simulation model of the blade was established based on these mechanical property parameters, and strength analysis was performed. The simulation results provided the stress distribution and the strength of the turbine blade.
Optimization of Surface Finish of Plasma Metal Deposited Stainless Steel 316L Parts by Utilization of Plasma Beam Remelting (PBR) and Taguchi Methodology
Authors: Srinivasa Chari V. , Jhavar Suyog , Suresh R.
Published: April 2024

The study aimed to optimize the Plasma Beam Polishing process for 316L stainless steel components to reduce anisotropy and poor surface roughness using statistical analysis. An experimental design investigated the impacts of managing factors on surface roughness, with scanning speed having the ultimate impact, followed by beam power and energy density. For lower values of plasma energy density and scanning speed, and a focal location without changes on the metal surface, there was a strong tendency for the estimated Ra to drop with increasing laser power. The process parameters were changed throughout a broad range of values, making it challenging to model the dependent variable across the whole range of experimental trials. The study supports the potential of PBP as a post-processing method for additive manufacturing components.
Exergy Analysis of Tita nium Dioxide (TiO2) Suspended with R290/R600 as a Substitute for R134a
Authors: Madyira D.M. , Babarinde T.O.
Published: April 2024

Synthetic refrigerants are being phased out gradually in accordance with international environmental protection protocols because of global warming and ozone layer depletion. Adopting R290/R600 refrigerant, an environmentally friendly refrigerant, to replace R134a, a high global warming potential refrigerant, provides one of the solutions. In this study, exergy analysis of R134a and TiO2 suspended with lubricant and R290/R600 with a composition of 60% R290 and 40% R600 (60:40) was investigated in vapour compression system (VCRS) using R290/ R600 in TiO2 nanomixture lubricant and compared with R134a and R290/ R600 in pure lubricant. At the inlets and outlets, the main components of the VCRS are connected to temperature and pressure sensors to measure the inlet and outlet temperatures and pressures. The results obtained were used to analyses the exergy losses at various VCRS components (compressor, condenser, evaporator, expansion valve) were investigated to determine the refrigerator’s total exergy destruction (E·xdest.Total) and efficiency (ηex). The E·xdest.Total of R290/R600 in pure lubricant and R290/R600 TiO2 nanomixture lubricant was reduced by 26.9% and 42.3%, respectively, and system ηex increased by 27.7% and 38.9% respectively when compared to R134a in the system. Hence, TiO2 suspended with R290/R600 is potential a substitute for R134a.