bluuebunny/crossref_metadata_2025 huggingface dataset:
Estudio de las TIC en el Aprendizaje del Idioma Inglés en la Universidad Tecnológica de Tecamachalco (UTTECAM)
Authors: López Vázquez Rosalba , Ochoa Jiménez Carmela , González Pérez Manuel
Published: October 2023

En los últimos años el uso de las Tecnologías de la Información y las Comunicaciones (TIC) en el aprendizaje del idioma inglés es una herramienta innovadora en México en los distintos niveles educativos.  Por tal motivo, este proyecto tiene como objetivo estudiar la utilidad del uso de las TIC en el aprendizaje del inglés como lengua extranjera (EFL) en la Universidad Tecnológica de Tecamachalco. Se encuestó a seiscientos sesenta y seis estudiantes. El cuestionario fue diseñado y validado por expertos en el área. La validación del cuestionario se realizó mediante la metodología del Dr. Manuel González Pérez, la cual consiste en aplicar dos métodos estadísticos multifactoriales por medio de la correlación de Pearson para las correlaciones lineales y chi-cuadrado para las correlaciones no lineales con el propósito de validar los resultados de las afirmaciones de los estudiantes en la materia de inglés. Se notó que los pensamientos de los estudiantes no fueron lineales de acuerdo con chi-cuadrado y las acciones de las variables son lineales confirmando el análisis de correlación de Pearson siempre y cuando cuenten con un buen servicio de internet y una plataforma como colaborador para aprender inglés de forma independiente. Se concluyó que los estudiantes afirman que el uso de la plataforma digital para aprender inglés es útil, y que es importante que la UTTECAM ofrezca un buen servicio de internet para realizar sus prácticas en la plataforma del libro ya que están conscientes de los beneficios que pueden tener al conseguir un buen nivel de inglés en el sector laboral.
La Imposibilidad Financiera del Municipio para el Cumplimiento de sus Obligaciones Constitucionales
Authors: Gallardo García Martín
Published: October 2023

El presente trabajo de investigación demuestra la razón por la cual los municipios en México incumplen con las obligaciones constitucionales contempladas en la normativa nacional, estatal y municipal referentes a la prestación de los servicios públicos básicos que requiere la población para disponer de una vida integral de calidad tal y como lo mandatan los tratados internacionales de los cuales México forma parte, entre los que se encuentran los servicios de agua potable, drenaje, alcantarillado, tratamiento y disposición de sus aguas residuales; alumbrado público, limpia, recolección, traslado, tratamiento y disposición final de residuos, calles, parques y jardines y seguridad pública. La metodología utilizada consistió en realizar un análisis exhaustivo de la normativa nacional, estatal y municipal referente a las obligaciones del municipio y las fuentes de financiamiento donde pudimos advertir claramente que los recursos económicos más cuantiosos provienen de la federación (ingresos participables) que en la mayoría de los casos representan hasta el 90% de los dineros de que dispondrán durante un ejercicio fiscal. Concluyendo que de acuerdo con el sistema de distribución de la riqueza, los municipios estarán imposibilitados para el cumplimiento de sus obligaciones constitucionales y que esta situación prevalecerá hasta en tanto no cambie el sistema de distribución de la riqueza que recauda el Estado por concepto de los tributos que pagan los mexicanos lo cual no sucederá debido a que la Federación no permitirá perder el control económico del país, y con ello, el dominio sobre las entidades federativas y los municipios.
Integration of a Gamma-Type Stirling Engine with LPG Cooking Stove for Micro-Scale Combined Heat and Power Generation
Authors: Jufrizal  , Farel Hasiholan Napitupulu  , Ilmi  , Himsar Ambarita  , Supriatno  , Muhammad Irwanto
Published: October 2023

The Stirling engine is one of the most versatile micro-scale prime movers for combined heat and power applications, adaptable to different levels of heat sources. This study started a unique journey that included developing, experimenting, and analyzing the Gamma-type Stirling engine. Notably, the engine design ingeniously harnesses heat from a customized cooking stove burner powered by liquefied petroleum gas. The engine fabrication resulted in a compression ratio 2.014, accommodating a volumetric capacity of 181 cc. The Stirling engine test used air as the working gas, and the initial conditions were at atmospheric pressure. Stirling engine performance was analyzed using an ideal thermodynamic cycle model and burner efficiency using the water boiling method. The modified burner attains an average temperature of 699.5°C, producing a burner power output of 5.702 kW and a thermal efficiency of 32.7% or around 1.867 kW of heat for operating the engine and cooking activities. Simultaneously, tests of the Stirling engine revealed an average air temperature difference of 146.2°C between the expansion and compression phases. The flywheel rotation speed ranges from 158 to 369 rpm. During testing, the Stirling engine obtained an average thermal efficiency of 31.08%, accompanied by an ideal power spectrum ranging from 0.3 W to 42.6 W. The highlight of this study was the maximum pressure achieved at the end of the heat absorption stage, recorded at 296.1 kPa. Importantly, these findings underscore the promising potential of micro-Combined Heat and Power systems. Integrating the gamma-type Stirling engine with the LPG stove represents novelty and paves the way for further development and advancement in sustainable energy solutions.
Unsteady MHD Casson Fluid Through a Porous Medium over an Inclined Plate in the Present of Chemical Reaction
Authors: Husna Izzati Osman  , Zulkhibri Ismail  , Dennis Ling Chuan Ching  , Nur Fatihah Mod Omar  , Dumitru Vieru
Published: October 2023

The unsteady of MHD Casson fluid flow through an infinite inclined plate in the presence of chemical reaction is investigated. In this research, Casson fluid model is choose to be used in this study to characterize the non-Newtonian fluid behaviour. We are employed the Laplace transform technique with an appropriate boundary condition to convert the governing partial differential equations into ordinary differential equations. All the transformed equations are then solved numerically by using Mathematica. Finally, we were obtained the exact solution of momentum, energy and concentration of the cases. The results of flow features for different values of the governing parameters, unsteadiness parameter, Casson parameter are analysed in graphs and has been discussed in the result section. The results presented that fluid velocity rises with the increment of magnetic parameter due to the present of Lorentz force. Lorentz force helps in reducing heat for electronic system and radiators. Furthermore, the increasing of inclination angle and chemical reaction make the velocity increases. The result for Casson fluid explained that this fluid helps to lower the resistance of the yield stress so that the velocity become higher.
Numerical Computation of Radiative MHD Micropolar Nanofluid Flow over a Stretching Sheet with First Order Chemical Reaction and Soret Effects
Authors: Gopinathan Sumathi Mini  , Prathi Vijaya Kumar  , Shaik Mohammed Ibrahim
Published: October 2023

The outcomes of the current study may have broad applications in contemporary industrial technologies, including those involved in blood transportation, lubrication, rigid and random cooling particles of metallic sheets, etc. New studies have shown that the thermal conductivity of a nanofluid is triggered by Brownian motion and thermophoretic collisions. Primary research interests include the effects of chemical reaction, radiation, and the Soret effect on micropolar nanofluids along an inclined stretched sheet. Effects of thermophoresis and Brownian motion is considered and the Buongiorno's model is taken into account. To get the nonlinear ordinary differential equation from the PDEs, compatible transformations are used. Mathematica's NDSolve technique is implemented to do a numerical treatment of the dimensionless equations once they have been translated. The upsides of this strategy lie in its ability to automatically track errors and select the best algorithm. Graphical and numerical treatments of the physical quantities of interest are provided. The tabulated magnitudes of the numerical outputs compare well with those that currently exist. Graphs showing the energy transfer rate as a function of the many contributing factors. As the Brownian motion factor increases, the skin friction and the mass transfer rate upsurge and the rate at which energy may be transported climbs. As the angle of incidence increases, skin friction rises while the Nusselt number and Sherwood number fall. Velocity profile rises with the material parameter. Radiation parameter tends to rise the temperature.
Arbitrary Phase Optimization Through Adaptively-Scheduled Nanophotonic Inverse Design
Authors: MAĞDEN Emir Salih
Published: October 2023

Design of integrated photonic devices continues to drive innovation in electro-optical systems for many applications ranging from communications to sensing and computing. Traditional design methods for integrated photonics involve using fundamental physical principles of guided-wave behavior to engineer optical functionalities for specific application requirements. While these traditional approaches may be sufficient for basic functionalities, the set of physically realizable optical capabilities these methods remains limited. Instead, photonic design can be formulated as an inverse problem where the target device functionality is specified, and a numerical optimizer creates the device with appropriate geometrical features within specified constraints. However, even with inverse design methods, achieving arbitrarily-specified phase offsets on-chip remains an important problem to solve for the reliability of interferometry-based nanophotonic applications. In order to address difficulties in achieving simultaneous phase and power optimization in inverse nanophotonic design, in this paper, we develop a set of optimization approaches that can enable user-specified phase differences in single-wavelength and multi-wavelength nanophotonic devices. By specifying phase offset targets for each output, we prevent convergence failures resulting from the changes in the figure of merit and gradient throughout the iterative optimization process. Additionally, by introducing phase-dependent figure of merit terms through an adaptive scheduling approach during the optimization, we accelerate device convergence up to a factor of 4.4 times. Our results outline a clear path towards the optimization of nanophotonic components with arbitrary phase-handling capabilities, with potential applications in a wide variety of integrated photonic systems and platforms.
Emzirme Desteğinde Babaların Eğitimi: Randomize Kontrollü Çalışmaların Sistematik İncelemesi
Authors: BOYRAZ Hilal Gül , ERBİL Nülüfer
Published: October 2023

Amaç: Doğum sonrası dönemde emzirmenin başlatılması, sürdürülmesinde eş desteği önemlidir. Bu sistematik derlemenin amacı, emzirme desteğinde babaların eğitimine yönelik randomize kontrollü çalışmaların bulgularının sistematik incelenmesidir.

Yöntem: Sistematik derleme niteliğinde olan bu çalışmada, PubMed, Science Direct, Web of Science, Cochrane ve Scopus veri tabanlarından 24.06.2022-01.08.2022 tarihleri arasında tarama yapıldı. Taramada “education of fathers OR breastfeeding”, “education of fathers AND breastfeeding” anahtar kelimeleri kullanıldı. Sistematik derlemeye, alınma kriterlerine uyan 7 randomize kontrollü çalışma dahil edildi. Sistematik derlemenin raporlamasında PRISMA kılavuzundan yararlanıldı.

Bulgular: Çalışmada toplam 401 çalışmaya ulaşılmış ve analiz sonucunda 7 randomize kontrollü çalışma alındı. Babalara verilen emzirme danışmanlığı eğitimlerinin, baba odaklı doğum öncesi emzirme sınıfının ve anne-babalara birlikte verilen emzirme eğitimlerinin emzirme öz yeterlilik, bilgi ve tutumlarında olumlu etkileri olduğu bulundu, ancak anne ve babalara verilen oral stimülasyon programının emzirme süresine etkisi olmadığı saptandı.

Sonuç: Babalara verilen emzirme eğitimlerinin, babaların emzirme öz yeterlilik, bilgi ve tutumlarında olumlu etkilerinin olduğu, prenatal ve postnatal eğitimlere anneler ile birlikte babaların dahil edilmesinin emzirmeyi başlatma ve sürdürmede etkili olacağı sonucuna varıldı. Bununla birlikte, bu konuda daha fazla çalışma yapılması önerilir.
Investigating Microbial Triggers of Nitrous Oxide Emissions in Agriculturally Influenced Aquatic Ecosystems
Authors: Crundwell C , Phillips Lori , Weisener Chris
Published: October 2023

The agricultural sector in Canada is responsible for approximately 9% of greenhouse gas (GHG) emissions in Canada, accounting for 54 MT of carbon dioxide (CO2), as well as 31% of methane (CH4) and 75% of national nitrous oxide (N2O) emissions in 2021 (Environment and Climate Change Canada 2021). However, these estimates do not include the indirect GHG emissions that occur in agriculturally impacted waterways. Ontario is home to over 45 000 kilometers of agricultural drainage ditches, with tile drains directly connecting terrestrial and aquatic environments. Microbial biogeochemical cycles in the causeways experience fluxes of nutrients leading to hotspots for GHG at the sediment-water interfaces. Along with fluxes of nutrients, the causeways are regularly disturbed by anthropogenic effects (e.g., dredging, removal of vegetative buffers) and increasing frequency of storm events. Previous studies have used static chambers to evaluate GHG emissions from aquatic systems (Mu et al. 2022, Xiao et al. 2016). However, this approach can be time consuming and labour intensive and is impractical in aquatic systems due potential extensive underestimation of fluxes from diffusion. To resolve driving factors contributing to GHG in these systems a detailed study investigating the activity of the microbial community is warranted. In this study we hypothesize microbial activity within the sediment will correlate with N2O emissions. To test the response of the microbial community a combination of molecular approaches (i.e., qPCR and Ion torrent) targeting archaeal and bacterial nitrifiers and denitrifies was used. These functional responses were evaluated with respect to N2O emissions, which were measured in the field at the time of sampling using Unisense N2O probes. In this study, N2O sensor response was calibrated to a functional gene index for rapid risk assessment of GHG hotspots.
Emergence of the 2.1 Ga Francevillian biota was preceded by unprecedented hydrothermally driven seawater eutrophication
Authors: Chi Fru Ernest , Aubineau Jérémie , Bankole Olabode , Ghnahalla Mohamed , Soh Tamehe Landry , El Albani Abderrazak
Published: October 2023

Recently, two independent studies suggest that the emergence of putative fossilized macro-eukaryotes in the Paleoproterozoic Francevillian Basin, ~2.1 billion years ago, may be related to a rise in seawater Zn bioavailability. This explanation is reliant on their extraordinary high Zn content and association with light Zn isotopes characteristic of eukaryotic enrichment. However, the trigger and origin of rising seawater Zn supply to the basin remains unknown. This study unravels a transient episode of intense submarine hydrothermal activity that triggered the weathering of a nutrient-rich oceanic crust reservoir, related to the collision of the Congo-São Francisco cratons during the Eburnean-Transamazonian orogeny, as the source of abundant seawater dissolved Zn, together with a suite of essential trace metals and phosphate to the continental margin waters. Surprisingly, the initiation of hydrothermal weathering coincided with the rapid onset of a rare Paleoproterozoic seawater eutrophication event. This transition is marked by basin-wide redox stratification, high sediment loading with organic carbon (Corg) and nitrogen, elevated C/N ratios, a steep negative Corg and positive bulk N isotope excursion, positive Ce anomalies, and low Mn/Fe ratios. Importantly, the transient eutrophication event ended with a reversal to lower seawater phosphate levels that coincided with rapid seawater ventilation and the appearance of macrofossil bearing sediments in Franceville. We suggest that these unexpected, localized conditions, set the stage for the emergence of the Francevillian biota.
In situ sensor-based monitoring strategies for biogeochemical reactions in mine tailings environments
Authors: Nakoh Eric , Enright Allison
Published: October 2023

Natural resource extraction and ore processing have significant environmental impacts, such as the generation of wastewater, waste rock and tailings. These waste products are often detrimental to ecosystems, and negatively impact surface and groundwater bodies, often necessitating remediation treatments and long-term management of sites by operators, or, where operators have abandoned a contaminated site, by regulators and government agencies. Such cleanup and monitoring efforts regularly continue for decades after a site is closed.

Monitoring efforts usually serve two purposes: characterizing the long-term changes at a site once extraction and processing activities have ceased and evaluating the effectiveness of applied remediation treatments. Monitoring activities are usually mandated in the site’s operating license and usually include frequent field sampling of surface water, groundwater, and soil or sediment, as well as ecological studies describing floral and faunal abundances. These samples are then analyzed to quantify the mobility and phase of contaminants (i.e., toxic heavy metals, hydrocarbons), fundamental water quality parameters (i.e., pH, TDS, alkalinity), and the makeup and function of the microbial community (i.e., culturing, microcosms, ‘omics). The need for skilled workers and constant on-site personnel presence means that environmental monitoring is a high- cost activity for site operators and is a significant financial burden for government and regulatory agencies tasked with managing abandoned legacy mine sites.

Over the last decade, rapid developments in platforms for deploying remote scientific instrumentation, lower-cost environmental sensors, and data transmission from remote locations have brought about a renewal of interest in sensor-based environmental monitoring strategies. These approaches offer several advantages, such as lower cost, near real-time data access, and lower exposure risk to toxic and hazardous materials.

Here, we will present data collected from a suite of electrochemical sensors deployed in situ at a closed, managed mine site to monitor the effectiveness of remediation treatments in real-time. These results provide proof-of-concept for the effectiveness of sensor-based monitoring technology as part of safe, effective long-term remediation and management strategies.
Response of Microbial Community Stability to Chemical Oxidation Remediation Process in a Petroleum Hydrocarbon Contaminated Groundwater Site
Authors: Jia Wenjuan , Lv Shengmei , Cheng Lirong , Zhu Yi , Ding Aizhong
Published: October 2023

The stability of the microbial community is a vital indicator of microbial ecosystems. However, the mechanism of microbial community stability during in situ chemical oxidation in petroleum-hydrocarbon-polluted groundwater is unclear. This study analyzed the biomass, diversity, co-occurrence network feature and negative cohesion of microbial community at different stages to identify the changes in microbial community stability under chemical oxidation. In addition, microbial module compositions and crucial functions were analyzed to further explore the reason for the change in community stability at the module level. Multiple regression analysis was conducted to explore the microbial module explanatory degree to microbial community stability changes. The results indicated that the microbial community stability was destroyed by chemical oxidation. The carbon source effect was the main reason in the early oxidation stage, while the oxidation stress effect was the main reason in the late oxidation stage. Most microbial modules were transformed from K-strategists to r-strategists, and modular keystones were transformed to stress-tolerant species in the oxidation stage. This study suggested that microbial clusters were essential indicators of the microbial community in petroleum hydrocarbon groundwater during the chemical oxidation period.
Integrative taxonomic analyses reveal first country records of Occidozyga shiwandashanensis Chen, Peng, Liu, Huang, Liao & Mo, 2022 and Hylarana latouchii (Boulenger, 1899) (Anura, Dicroglossidae, Ranidae) from Vietnam
Authors: Tran Tung , Hoang Chung , Luong Anh , Nguyen Truong , Ziegler Thomas , Pham Cuong
Published: October 2023

Occidozyga shiwandashaensis was recently discovered from Guangxi Province of China. Hylarana latouchii is a widespread species in southern China, including Hong Kong and Taiwan. Both species are expected to be found in the border areas between Vietnam and China; however, no records of these frogs have been documented from Vietnam so far.

We record two species of amphibians for the first time from Vietnam, namely Occidozyga shiwandashaensis from Bac Giang Province and Hylarana latouchii from Hai Phong City and Quang Ninh Province in northern Vietnam. Morphologically, the Vietnamese representatives of O. shiwandashanensis resemble the type series from China. The specimens of H. latouchii from Vietnam slightly differ from the type series from China by having a larger size (SVL 48.6–51.7 mm in males, SVL 58.4 mm in the females vs. 36.0–40.0 mm in males, 42.0–53.0 mm in females). Genetic distances between the Vietnamese records and the type specimens of O. shiwandashanensis from China varied from 0 to 1.5% (16S gene). Genetic divergences between the Vietnamese records and H. latouchii from the type locality were 2.0–2.6% (16S gene). In addition, morphological data and natural history notes of the aforementioned species are provided, based on the new records from Vietnam. ­­
Study on the spatial variation of sensitivity of soil nutrient system in Xinjiang, China
Authors: Sheng Yang , Sun Dehua , Liu Weizhong
Published: October 2023

Previous studies have explored the long time series and large-scale cultivated land nutrient sensitivity and its spatial differentiation characteristics in arid zones from human activities in the context of climate change. This study is based on 10-year interval data on soil nutrient content of cultivated land in the oasis in Xinjiang, China, cultivated land use intensity (LUI) and climate data sets. Using sensitivity and GIS analysis methods, this paper studies soil nutrient sensitivities and their spatial distribution patterns in the context of LUI and climate change. The results showed significant response differences and spatial heterogeneity regarding the sensitivity of soil nutrient systems to LUI and climate change. Among them, soil nutrients were the most sensitive to temperature changes, followed by LUI, while precipitation was the weakest. Soil nutrient sensitivity showed a decreasing spatial distribution pattern from the northeast to the southwest. The soil nutrient system had a strong adaptability to LUI and climate change. However, there were differences in different sensitivity states. These results provide scientific guidance for the spatial selection and implementation of soil fertility enhancement and land remediation projects in similar arid areas.
Common best proximity point theorems for proximally weak reciprocal continuous mappings
Authors: Unni A. Sreelakshmi , Pragadeeswarar V. , De la Sen Manuel
Published: October 2023

The main objective of this paper is to find sufficient conditions for the existence and uniqueness of common best proximity points for discontinuous non-self mappings in the setting of a complete metric space. We introduce and analyze new concepts such as proximally reciprocal continuous, proximally weak reciprocal continuous, R-proximally weak commuting of types $ M_{\Lambda} $ and $ M_{\Gamma} $ for non-self mappings. Furthermore, we obtain a common best proximity point theorem for such mappings. In addition, we provide an example to support our main result.
Flood Syndrome: Endovascular management of spontaneous rupture of an umbilical hernia due to long-standing ascites – A case report
Authors: Peñalver Calero Pablo , Leyva Vásquez-Caicedo Marco , González-Nieto Claudia Jimena , Armijo Astrain Javier Eduardo , Méndez Montero José Vicente
Published: October 2023

Umbilical hernias are common in patients with cirrhosis of the liver and ascites; however, spontaneous rupture of the hernia is a rare complication. Flood Syndrome occurs very rarely in cirrhotic patients with massive ascites and refers to the spontaneous rupture of an umbilical hernia followed by leakage of ascites fluid. A literature search shows that patients have been managed both operatively and nonoperatively for this condition. We report a case of a 56-year-old man with a history of alcohol-related liver cirrhosis and massive ascites refractory to medical therapy with sudden and spontaneous perforation of his hernia leading to drainage of ascitic fluid from the abdomen. We performed a transjugular intrahepatic portosystematic shunt to relieve portal pressure and subsequent intraabdominal pressure. The patient had resolution of symptoms and the ascitic fluid outflow was resolved.
Evaluation of Engineering Properties of Fired Cement Lateritic Brick
Authors: Abdulwahab Rasheed , Akinwamide Glory O. , Anifowose Mukaila Abiola , Odeyemi Samson Olalekan
Published: October 2023

The construction industry is really concerned with producing better and durable building materials. Hence, the high cost of conventional building materials have resulted into use of locally available materials. This study assess the effect of varying cement content on engineering properties of fired lateritic bricks. The lateritic soil samples were stabilized with cement at 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7 and 7.5%, cast in moulds and later fired for 8 hours at a 1000°C. Index properties (natural moisture content, specific gravity, particle size distribution and atterberg limit tests) were determined on the natural lateritic soil. While compressive strength, water absorption, abrasion and impact value test were determined on the cement fired bricks. The lateritic soil in its natural form were classified as A-6 and clay of high compressibility in accordance to ASTM D-3282. The results of the index properties are within acceptable limits for lateritic soil. The effect of varying cement content on the mechanical properties showed that the compressive strength of the bricks increases from 4.0 N/mm2 at control (un-stabilized brick) to 7.3 N/mm2 at 5% soil stabilization with cement. However, significant reductions in value was witnessed in the water absorption, abrasion and impact value results between the un-stabilized brick (control) and 5% cement fired bricks. The study concluded that fired bricks stabilized with 5% cement was found to be the best and most suitable for load and non-load bearing walls.
Optimization of the Printing Parameters of Glass Fiber Reinforced PA6 Using Factorial Experiments
Authors: Marin-Corciu Matei , Sîrbu Nicuşor Alin , Murariu Alin Constantin , Cocard Marius , Geana Alexandru Adrian
Published: October 2023

Fiber-reinforced 3D printing filaments are composite materials compounded with short, chopped additives (in this paper case glass fibers) in a polymer matrix base. Engineering filaments and reinforced filaments have gotten a lot more popular in the last few years due to their capabilities and added properties given by the reinforced material. The biggest drawback reinforced materials have other than the cost is the printability. Due to the abrasive nature of glass fiber to be able to successfully print it certain modifications to the FDM equipment must be made, such as using a tempered steel nozzle. It is also recommended to print the components in a temperature-controlled room and to keep the humidity level of the material before printing as low as possible. In this paper a glass fiber reinforced PA6 filament was tested using different printing parameters (temperature, printing speed, layer height) to establish the optimal parameters for reducing the risk reinforced materials pose for the FDM equipment while also looking for the best mechanical properties of the printed parts.
Designing a Roundabout to Overcome Traffic Congestion at a Four-Armed Intersection
Authors: Hemavathy M. , Malarvizhi Ganapathi
Published: October 2023

The growth rate of vehicles is increasing in most metropolitan areas, and as a result, traffic congestion is also increasing, particularly at intersections. Traffic congestion is one of the major problems faced by most of the developing countries despite the measures taken to mitigate and reduce it. In order to overcome traffic congestion, especially in four-way intersections with increasing growth rate of vehicles, roundabout design is a popular traffic management solution in urban areas. In most countries, roundabouts have been widely adopted as an alternative to signalized intersections due to their ease of operation with fewer conflict points. In a metropolitan city like Chennai, there are numerous areas facing traffic congestion. This study aims to design a roundabout for a four-armed intersection located at one of the most congested areas in Chennai, India - Porur Junction. It is a four-armed intersection with traffic on all approach roads and controlled by a signalized intersection. The effective solution would be an elevated roundabout bridge by connecting the major roads towards Poonamallee and Guindy with a two lane road and the minor roads towards Kundrathur and Arcot Road with two separate lanes, one for entering and the other for exiting the junction. The efficiency of the elevated roundabout bridge is that it has speed breakers in the entry ramp which slows down the vehicle & has a central island structure which is used to effectively manage the traffic without stopping the vehicles. After passing through the Central Island, vehicles can exit the barrier at a higher speed than the entry speed in a clockwise direction.
Investigation on Generative Designs for Fast Connector Socket (FCS) Using High-Strength Low-Alloy (HSLA) Steel
Authors: Narayana Varra , Reddy B. Sreenivasa Kumar , Reddy V. Venugopal
Published: October 2023

This study appears to focus on the application of metal additive manufacturing and generative designs to create more efficient and sustainable metallic components. The methodology developed in this study takes a comprehensive approach, from component selection to validation of outputs, which can lead to more efficient use of metallic parts in the future. Here CATIA V5 R20 used to create three new models of a fast connector socket (FCS) components, and then using ANSYS Workbench 16.0 apply the working load limit of 4.5 ton load with AISI 4142 380 qt steel alloy material used to the models to analysis. The Autodesk Fusion 360 software was then used to create generative designs for the fast connector socket models, which aimed to reduce mass, size, and material of the model while maintaining its effectiveness. The generative design approach used in this study is inspired by nature's evolutionary design process and considers production processes and cost restrictions. This approach can lead to the creation of more efficient and sustainable metallic components that can be used in various applications, including mechanical, marine, mining, construction, load lifting, pulling, and holding. Overall, this study highlights of the potential benefits. The comprehensive methodology used in this study can be applied to other metallic component designs to improve their efficiency and sustainability.
Molecular Dynamics Simulation on Shocked Nanocrystalline Aluminum
Authors: Ju Yuan Yuan , Zhang Lei
Published: October 2023

The characteristics of shocked nanocrystalline aluminum are investigated by using molecular dynamics method based on the embedded atom method potential function. The result presents the particle velocity profile and the width of shock front in detail. The simulated Hugoniot relations are basically consistent with the experimental data and other molecular dynamics results. The width of shock front decreases with the particle velocity exponentially.
Lateral Torsional Buckling Strength Analysis of Single Symmetric I-Beam Section
Authors: Hsu Wei Hsun , Liu Chang Hung , Ho Kun Ze , Hsu Wei Ting
Published: October 2023

The common beam sections in the engineering field are mostly double symmetrical I-beams, It’s advantage is that the design and analysis are double symmetric geometry, therefore simpler. The monosymmetric I-shaped section is relatively in line with engineering requirements and material economy, the reason is that the main design basis for the strength of the I-shaped section is the influence of the section geometry on the compression side. This study focuses on different monosymmetric sections, Its area contrast (A) is 1, 1.33, 1.46, 1.5 and 1.99 respectively. The relationship between the ratio of the five section enlarged wing plates and the nominal bending strength (Mn). monosymmetric section is divided into plastic, inelastic and elastic three intervals for analysis and comparison. Area contrast of 1 is bisymmetric section, magnifications from 1.33 to 1.99 are different magnifications for pressure flanges, area contrast 1.99 relative double symmetry area increased by 1.3 times, strength increased by a factor of 1.2 in the plastic zone, the inelastic interval increases by 2.2 times, the elastic range increases by 3.8 times, increasing the compression flange area can increase the strength of the section in the plastic, inelastic and elastic ranges. in this study, the area contrast is analyzed as the 1.46 intensity change point, abrupt slope changes in intensity occur in area contrast to-intensity curves. Through the above analysis method, the study adopts the AISC 2017 specification to analyze the single symmetrical flange section of the I-beam, discuss the strength difference of the enlarged ratio of the compression side, and establish the strength relationship curve of each section, and propose the single symmetrical I-shaped section with the best benefit.
The Effectiveness of Arenga Pinnata Fiber Carbon Modified with Iron Oxide as an Adsorbent for Various Cationic Dyes
Authors: Mahardiani Lina , Nugrahini Elisabeth , Ciptonugroho Wirawan , Susilowati Endang , Saputro Sulistyo
Published: October 2023

Disposing of dyes without proper treatment can cause water pollution because disposable dyes have a complex composition and are inert, so they must be adequately treated before being discharged into the waters. Using carbon from sugar palm (Arenga pinnata) fiber waste modified with iron oxide can be an alternative functional adsorbent for dye waste. The production of this practical adsorbent starts with carbonation of palm sugar fiber, chemical activation using H2SO4, incipient wetness impregnation with Fe(NO3)3.9H2O and ends with calcination at various temperatures of 200 °C, 300 °C; and 400 °C for 2 hours. The resulting carbon adsorbent material is characterized using FTIR (Fourier Transform Infrared), XRD (X-Ray Diffraction), and SEM (Structural Equation Modeling) analysis. In addition, the absorption capacity of the adsorbent for the dye waste is tested using the UV-VIS (Ultraviolet-Visible) instruments.
Myocardial Perfusion Scan Study before and after On-Pump Coronary Artery Bypass Grafting Surgery – A Single-Center Study
Authors: Chellasamy Rajeev Thilak , Sai Chandran B V , Halanaik Dhanapathi , Rath Durga Prasad
Published: October 2023

Aim:

Ischemic cardiac disease is the most common adult heart disease. The primary aim of the study was to analyze the myocardial perfusion status of the patients undergoing coronary artery bypass graft using sestamibi scan and assess the improvement in perfusion status of the myocardium after the surgery.

Materials and Methods:

This study was a descriptive study consisting of a single group of patients undergoing elective surgery for coronary artery disease. The patients underwent myocardial perfusion scan before surgery. Another myocardial perfusion scan was performed 3 months after the surgery. The change in myocardial perfusion status was analyzed.

Results:

Totally, 49 patients were initially included in this study. Seven patients lost their follow-up. Among the 17 patients who had severely reduced tracer uptake preoperatively, 3 (7.1%) had a good outcome, while 14 (33.3%) had a poor outcome, which was statistically significant (P < 0.001). Eighteen cases who belonged to the category of moderately reduced tracer uptake while analyzed, it was found that 16 (38.1%) had a good outcome while only 2 (4.8%) had a poor outcome; the difference in proportion among these two groups was statistically significant (P < 0.001). The patients who had mildly reduced tracer uptake preoperatively, all 3 (7.1%) had a good outcome, but it was not statistically significant (P = 0.23). Four patients had adequate tracer uptake preoperatively, out of which 3 (7.1%) had a good outcome, while the other 1 (2.4%) had a poor outcome and was not statistically significant (P = 0.63).

Conclusion:

Surgical revascularization improves perfusion in a selective group of patients.
18F-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in a Rare Case of Epithelioid Hemangioendothelioma – A Diagnostic Challenge
Authors: Nisamudeen Fahad , Prabhu Meghana , Bihari Chhagan , Sarangi Jayati , Yadav Hanuman Prasad
Published: October 2023

Our case highlights the 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) scan findings in a rare case of biopsy-proven epithelioid hemangioendothelioma (EHE) in a 66-year-old woman with multi-organ involvement (lung, liver, and bone) who was subsequently treated with palliative radiation therapy and oral pazopanib. Furthermore, follow-up 18F-FDG PET/CT findings are detailed. EHE is a rare malignant vascular neoplasm (<1% of all vascular tumors) with an epithelioid and histiocytoid appearance arising from the vascular endothelial and preendothelial cells.
Tumor Thrombus within the Superior Sagittal Sinus Detected on FDG PET Venography
Authors: Chandra Piyush , Chinnappan Sheela , Chandran Ganesan
Published: October 2023

Early detection of cereberal venous sinus thrombosis is important to prevent complication. Here we present an interstecting case of tumor thrombsosis of the superior sagittal venous sinus in a follow up case of adenocarcinoma esophagus, highlighting the feasibility for FDG PET venography for detection of the same.
Non Target Shunting of Tc-99m Macroaggregates of Albumin and Radiolabeled Yttrium-90 Microspheres into Hepatic Falciform Artery - Less Observed Arterial Variant not to be Overlooked
Authors: Sundaraiya Sumati , Damodharan Karthikeyan , Malla Avinash , Natarajan Suman Kalyan , Prashanth Arun , Nath Senthil Durai Satish
Published: October 2023

Identification of nontarget arteries is crucial prior to Yttrium-90 microspheres radioembolization. We present a case where an uncommon nontarget artery, the hepatic falciform artery was identified during work up for radioembolization and necessary preventive measures were taken to minimize the complications.
Ga68-FAPI Imaging and Lu177-FAPI Therapy in a Case of Metastatic Solitary Fibrous Tumor
Authors: Luthra Karuna , Lele Vikram , Kumar Kallur
Published: October 2023

Solitary fibrous tumor (SFT) of the central nervous system (previously called hemangiopericytoma) is a rare mesenchymal tumor. Malignant SFT has a tendency to recur after surgery and can metastasize to distant organs. Treatment options for metastatic disease are limited. This case demonstrated high expression of FAP (fibroblast activating protein) in all metastatic sites with Ga-FAPI positron emission tomography–computed tomography imaging. Subsequently, the patient was treated with Lu177-FAPI-targeted radionuclide therapy. There was significant clinical response. There was mild partial morphological response seen on follow-up imaging.
‘Coming out’/self-disclosure in LGBTQ+ adolescents and youth: International and Indian scenario - A narrative review of published studies in the last decade (2012-2022)
Authors: Sahoo Swapnajeet , Venkatesan Velprashanth , Chakravarty Rahul
Published: October 2023

Background:

People who identify themselves as Lesbian, Gay, Bisexual, Transgender, Queer, and others (LGBTQ+) go through a process of self-exploration and self-identification during adolescence, and the process resolves when one decides to self-disclosure. The experience of ‘Coming Out’ (CO) can be positive, leading to acceptance and a feeling of liberation, or it can be harmful, leading to stigma, humiliation, and discrimination, subsequently leading to significant psychological distress.

Aim:

This study was to do a narrative review on the studies published in the area/topic of CO in youth in the last decade (2012-2022) and to look for factors that act as barriers and facilitators of CO. Additionally, we have tried to look for differences in CO in LGBTQ+ adolescents and youth in the Western world vis-a-vis Indian/Eastern societies.

Materials and Methods:

An extensive literature search in electronic databases, PUBMED, Web of Science, EMBASE, Medline, Scopus, and search engine ‘Google Scholar’ using specific search terms and assessment of all published articles until 20th May 2023 was done.

Results:

Twenty-three studies were found eligible for data extraction, which discussed the problems faced during the CO process. Most of the studies are from developed countries, and only one is from India. Eleven were qualitative studies, 11 were cross-sectional studies, and one was a case study. The qualitative studies focused on generating themes of CO along with various issues/problems faced by the participants. The cross-sectional studies mainly explored parental reactions, stigma, parental support, psychological distress, and perceived stress in the participants. Major themes emerging from the qualitative studies were the experience of prejudice from various strata of society, such as parental, societal, racial, cultural, and religious factors that lead to problems of hiding, internalized homophobia, and anticipatory rejections that put this population under extreme conditions. Limited research is available from Eastern societies. More recently, the new generation of adolescents has taken the help of social media platforms for self-disclosure.

Conclusions:

CO is an elaborate multi-step process that considers the presence of parental/family and societal support, cultural/traditional values, and several psychosocial factors that determine the degree of positive outcomes. Emerging data indicated an improved trend of adolescents deciding to come out to families or in online platforms, both of which are associated with challenges, more in eastern collectivistic societies and developing countries.
An essay on the need to redefine economics for the sake of a human economy
Authors: Klamer Arjo
Published: October 2023

More than 90 years after Lionel Robbins more or less defined the subject ofeconomics in his famous essay, it is time to redress the issue in light of recent developments and new insights. Robbins used the figure of Robinson Crusoe to define homo economicus as an agent that makes choices in conditions of scarcity. By re-reading and re-interpreting the story of Crusoe, we make more sense of the narrative when we envisage people engaged in practices by which they realize what is important to them, that is, their values. Homo economicus becomes a special case pertinent to theinstrumental economies of markets and organizations. In the so-called human economies of the home, the social, cultural, and natural world, people use the inputs that they acquire in the instrumental economies to realize what is important to them, such as families, friendships, science, art, religion, meanings. This shift in perspective will have far reaching consequence for the way economists think and theorize and enables them to connect with the value-based approach that is increasingly dominatingthe worlds of business and politics.
Heterodoxy Needs Institutional Backing
Authors: Frey Bruno , Briviba Andre
Published: October 2023

A general aversion to new ideas, psychological factors, and foremost, institutional conditions shape the challenging position of heterodox economics. This institutional framework is coined by a strong orientation towards publication metrics and influences young scholars to conformity. We propose two ideas to improve the conditions for heterodox research. First, to introduce competition between journals for the scientific papers they want to have the most. Second, to establish a qualified random selection of papers to equalize the chances of publishing.
Impacto socioeconómico del programa Jóvenes Construyendo El Futuro en estudiantes universitarios en México
Authors: Pérez Zúñiga Eber Jardiel
Published: October 2023

La presente investigación surge por la problemática existente en la distribución de recursos estatales para políticas públicas que apoyen económicamente a la juventud mexicana. El objetivo del estudio es realizar un análisis comparativo de los presupuestos aprobados y pagados para el ejercicio fiscal 2021 de los programas; jóvenes construyendo el futuro y apoyos a médicos internos de pregrado en México. La metodología empleada fue una investigación básica, de campo y no experimental; de corte longitudinal y de alcance descriptivo. Además, se utilizó la encuesta como técnica de recolección de datos, mediante un muestreo no probabilístico, aplicada a 22 personas de cada programa mencionado previamente. Los resultados obtenidos revelaron que hay una gran disparidad entre los dos grupos. Los JCF reciben un monto fijo de ayuda económica mensual, mientras que la mayoría de los MIP perciben montos inferiores y de forma quincenal.
La comunidad y su influencia en la calidad de vida de los adultos mayores del cantón SigSig parroquia Ludo
Authors: Maza Poma Daisy Alexandra , Tapia Segarra Jenny Irlanda , Fernández Aucapiña Nancy Yolanda
Published: October 2023

La calidad de vida en las personas mayores se basa en varios factores como son: el entorno físico y social, en particular la vivienda, el vecindario y la comunidad, así como el nivel socioeconómico. El estudio planteó como objetivo determinar el impacto que tiene la comunidad en la calidad de vida de los adultos mayores, caso Ludo cantón Sigsig provincia del Azuay, la base de esta investigación tuvo un enfoque cuantitativo con un alcance descriptivo, el método utilizado fue deductivo que permitió conocer los hechos y situaciones de la comunidad que influyen en la calidad de vida de los adultos mayores, las técnica utilizada para la recolección de los datos fue la encuesta, se trabajó con la población comprendida por 40 Adultos Mayores como unidad de estudio. Los resultados obtenidos concluyen que la mayoría viven solos, dependen de su propio cuidado, muy pocos viven o reciben el apoyo de su familia y de la comunidad, son personas de edad muy avanzada, lo que afecta significantemente su calidad de vida y dificultan sus relaciones sociales.