bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental And Theoretical Study on The Impact Strength and Hardness Properties Of HDPE/SWCNTs Nanocomposites
Authors: Tebeta R.T. , Madyira D.M. , Fatthi A.M. , Ngwangwa H.M.
Published: August 2023

Polymer-based nanocomposites are widely investigated owing to their unique and remarkable mechanical properties. Yet, obtaining polymer nanocomposites with improved impact strength and acceptable hardness properties is a major challenge. This is because various types of polymers and nanoparticles can be combined to, or sometimes, fail to achieve such properties. However, the use of High-Density Polyethylene (HDPE) reinforced with Single-Walled Carbon Nanotubes (SWCNTs) nanoparticles at various weight fractions was proposed in this work. The analytical study was conducted according to the FEM approach on the hardness properties of HDPE/SWCNTs nanocomposites samples. The analytical FEM results of the hardness properties were validated by experimental results. The experimental study was conducted based on the hardness test and the Charpy impact test. The experimental results obtained showed a significant improvement in the mechanical properties of HDPE reinforced with SWCNTs nanoparticles. At 0.8 wt% of SWCNTs nanoparticles, considerable impact strength and hardness improvement were experienced. The impact strength of the HDPE was enhanced by 62.8%. Moreover, the impact test samples were found to be brittle based on the way they fractured after the test. This was validated using the tensile test results of another study. The hardness properties of HDPE were improved by 20.6%, which was found to be in support of the impact strength and tensile test findings. Furthermore, the theoretical model for the hardness properties of nanocomposites showed to correlate with the obtained results. These results prove that SWCNTs might serve as a suitable strengthening material for various polymers.
CFD Effect of Propellers Interference on the Thrust Variation in the Proximity of Fixed and Horizontal Moving Obstacle
Authors: Hage Charbel , Sophy Tonino , Aglzim El-Hassane
Published: August 2023

Quadcopters have gained widespread popularity in various sectors including military and civilian applications. They are used for tasks such as cargo transportation, military surveillance, and public aerial photography. However, when flying near obstacles or moving objects, quadcopters may encounter external forces that can cause flight instability. This research involves the use of Computational Fluid Dynamics (CFD) simulations to study the flow dynamics interference of two Phantom 3 drone propellers as they hover near fixed and moving obstacles. The simulations use a tetrahedral mesh with multiple reference frames (MRFs) and are validated by comparing the results to experimental and theoretical data. The simulations are conducted at different altitudes (0.1 m, 0.2 m, 0.5 m, and 1 m), rotational speeds (3000 rpm, 5000 rpm, and 9550 rpm), and with the obstacles moving at different velocities (5 m/s, and 10 m/s), in order to understand the aerodynamic effect of these variables on the performance of the propellers. When hovering (9550 rpm) at 0.1 m above a fixed obstacle, the results have shown first an increase in the lift by 9.28% for an isolated propeller, and then an increase by just 3.94%, and 4.39%, for the first and the second propeller, respectively, when placed next to each other (29 cm spacing). The variation in thrust is also reduced by half when the propellers are moving far from the wall (at 0.2 m height) compared to a sole propeller thrust. Finally, the moving wall below the propellers at several velocities proved to also have a significant effect on the thrust variation of the propellers at low hovering speeds.
A Numerical Study of Stent Expansion
Authors: Bamrungwong Joompon , Siangphor Nakarin , Ussawawongaraya Weerasak
Published: August 2023

Coronary Artery Disease (CAD) is mostly caused by the accumulation of fat and tissue in the artery walls and the obstruction of blood flow within the blood vessels. The narrowing of blood vessels results in symptoms of heart muscle weakness because there is not enough blood to feed. There are three methods of treatment for coronary artery disease including drug therapy, balloon dilation, and stenting (Percutaneous Transluminal Coronary Angioplasty (PTCA), and Coronary Artery Bypass Grafting (CABG) surgery). Several previous research studies found that the stent model created is based on the types of stents used in medicine. The aims of this paper are to conduct a simulation study of the interaction between the stent and the plaque attached to the blood vessels. The 3D model is created by SolidWorks and transferred to Ansys to perform structural analysis, and then the model is transferred to CFX to study the flow over the stent in the blood vessel using the Carreau fluid model. As for structure analysis, it was found that the results achieved using linear simulation and nonlinear simulation were not different. In the stent structure simulation, while the stent expanded over plastic deformation, the maximum stress was on the apex in both the linear and nonlinear studies. Obviously, the nonlinear simulation takes a lot of time to obtain the result when compared to the linear model simulation. The simulation result found that blood flow in the expanded stent is characterized as a loop that necks around struts; this might lead to stent vibration and harm to the blood vessels due to the loop of pressure along the stent length.
Jounce Bumper Modelling Using Finite Element Analysis
Authors: Elmahdi Elgack Mohammed , Hossoon Haret , Ghannam Omar , Hussien Hussien
Published: August 2023

Jounce bumpers act as suspension limiters during impact. They prevent the suspension from getting into kinematic singularity situation during shock impacts due to potholes, curbs, and debris on the road. A Jounce bumper is manufactured of hyperplastic materials to make use of the viscoelasticity characteristics allowing it to be a better absorber that minimizes transmitted forces to the vehicle body for failure prevention. Therefore, it is essential to create accurate models for reliable and practical bumpers testing and design optimization before manufacturing. In this work, we will provide a modelling approach to evaluate the static performance of some traditional jounce bumpers. The model accuracy was evaluated using standard bumper tests and found to have a good agreement.
A Novel Genetic Algorithm for Optimizing Microalgae Residence Time in Flat Panel Photobioreactors
Authors: Elmalky Adham M. , Araji Mohamad T.
Published: August 2023

Microalgae photobioreactors often rely on proper adjustment of residence time, which is a key variable for maximizing thermal and bioenergy generation. Limiting the residence time to a constant value over long periods can reduce the overall system productivity. The aim of this study was to investigate the performance of a new operational strategy for flat panel photobioreactors when integrated into building façades. This was achieved by examining the impact of variable residence time on biomass production and carbon absorption. The study coupled a detailed chemical kinetics model with Genetic Algorithm in the presence of shading assessment. The chemical model validation showed an average error of 3.8%. Different selection techniques were examined for the employed Genetic Algorithm framework to decrease the computational cost. The feasibility of the optimized photobioreactor was further assessed based on reducing the operational carbon footprint when added to building façades. Results showed that the optimal hourly residence times varied between 0.91 days and 1.97 days with an average value of 1.05 days. This increased the daily biomass generation by 28.8%, from 13.9 g/m2 to 17.9 g/m2. Corresponding CO2 extraction was also increased from 31.4 g/m2 to 34.8 g/m2. On annual basis, integrating the photobioreactors into building façades decreased the operational carbon footprint by 10 kgCO2/m2, 50 kgCO2/m2, and 140 kgCO2/m2 for low-rise, mid-rise, and high-rise buildings, respectively.
Structural Design of a Heliostat as a Senior Design Project
Authors: Qutafah Z. , Almarri R. , Ashkanani A. , Alsalem S. , Alhaddad F. , Guler M.
Published: August 2023

Solar energy capture efficiency is an important parameter since there is an urgent need to use renewable energy sources in an effective manner. Concentrated Solar Power (CSP) Plants use heliostats which can track the movement of the sun for increased energy storage. Different heliostat designs already in the open literature are reviewed in this paper. 5 different heliostat designs are prepared to compare and select the most effective one. Finite element analysis (FEA) is employed using the pressure obtained through computational fluid dynamics (CFD) analysis. Finally safety factor against yielding was used to compare the design and the least safety factor satisfying the requirements is selected as the result of the senior design project, the best design was with sefty factor 3.7 with Max Total Deformation was 16.982 mm.
Hydraulic Design, Numerical and Experimental Analysis of an API Overhung Pump Used in the Oil Industry
Authors: Sarabchi Niloufar , Sharifi Behzad Karimzad , Soroureddin Amir
Published: August 2023

An API overhung process pump is proposed and analyzed. The pump with a flow rate of 125 m3/h and a Head of 113 m is designed and manufactured by Pumpiran Co. according to API 610 standard. This pump is used in the Tehran oil refinery to pump heavy oil with a working temperature of 390 oC. In the present work, a novel method is developed to design the pump’s hydraulic components, including the impeller and double volute casing. For simulating the three-dimensional turbulent fluid flow, numerical analysis based on CFD is performed by ANSYS-Fluent software. The obtained numerical results are in acceptable agreement with the corresponding experimental results, and the relative error around the rated point is less than 2%. The maximum efficiency of 66.5% is achieved at a flow rate of 135 m3/h. The rated point is at 92.5% of the best efficiency point, and this value is within the allowable region of the API 610 standard. Furthermore, the effect of the volute throat area size on hydraulic performance is perused. The results show that with increasing the size of the volute throat area, the BEP shifts to higher flow rates.
Optimal Tuning of PID Controller for Boost Converter using Meta-Heuristic Algorithm for Renewable Energy Applications
Authors: Zafar Muhammad Hamza , Mansoor Majad , Khan Noman Mujeeb , Sanfilippo Filippo
Published: August 2023

The Dynamic Levy Flight Chimp optimisation (DLFC) method is used in this study to optimise the Proportional- Integral-Derivative (PID) Controller for the Boost converter. As a possible application, the tuned PID controller is utilised to adjust voltages in the use of renewable power sources. The maximum power point tracking control approach based on machine learning (ML) is used to anticipate the reference voltages for the solar system based on the irradiance and the ambient temperature. The tuned PID controller uses this reference signal to regulate the maximum power point (MPP) voltages. To finetune the PID controller, comparisons are done with grey wolf optimiser (GWO), Harris hawk optimisation algorithms (HHO), and particle swarm optimisation (PSO) algorithms. The tuned PID controller has fewer oscillations and requires little tracking time to adapt to changing load and environment conditions. Additionally, statistical analysis, such as Mean Absolute Error (MAE) and Root Mean Square Error (RMSE) between the reference voltage and the output voltage, is presented. Since the DLFC tuned PID controller performs better than HHO, GWO, and PSO in terms of RMSE and MAE, it may be a promising way for optimising PID controller tuning for boost converters in photovoltaic (PV) system applications.
Electro-Mechanical Sensor System Proposal to Address Automobile Tire Blowouts
Authors: Gurulé Gabriel , Richardson LeJuan , Hernández Jacquelynne
Published: August 2023

Tire malfunctions that contribute to motor vehicle accidents in the United States vary from 19,000 to 78,000 annually [1,2] with as many as 46% of those crashes occurring at high speeds on expressways. [3] In 2017, the National Highway Traffic Safety Administration reported 738 fatalities attributable to blown tires. No other means of transportation would be allowed to operate with a similar rate of safety failure – especially with a known cause. The automobile industry has made strides developing precautions for vehicle operators with tire pressure monitoring systems (TPMSs) and run-flat tires. However, the technology is incomplete. This paper purports to aid the existing tire safety technology by providing additional electro-mechanical options capable of preventing blowout occurrences, reducing rollovers, and minimizing casualties. This proposal incorporates the existing TPMSs and RFTs with overrides, power electronics, tire sensors and voice activation with passive and active schemes based on the tire contact patch.
An Emulated Platform for Detecting and Size Measuring of Oil Spills Using An Unmanned Aerial Vehicle System
Authors: Eldirdiry Omer , Al Maashari Ahmed , Saleem Ashraf , Ghommam Jawhar , Bourdoucen Hadj , Nasiri Navid , Al Rawas Ghazi , Al-Kamzari Amran , Ammari Ahmed
Published: August 2023

This paper presents the machine vision techniques implemented in an emulated environment that mimics the detecting process of oil spills in the ocean. An image processing algorithm is developed to achieve accurate detection and size measurement for studying oil spill cases. This study demonstrates the required setups and adjustments performed to mimic this process on a smaller scale, in a lab-based experiment. The proposed emulated system generates the required path for the quadrotor, used in this experiment, to maneuver around the arena and detect the oil spill. The drone successfully detected and accurately provided the location of the oil spot for several trails. For these attempts, the areas of the detected oil were calculated and compared. Some discussions were stated regarding some findings and exceptional cases. In general, the results attest to the efficacy of the proposed system.
3D Printing of High Performance Electrodes for Electrochemical Cell
Authors: Aghasharif Hosseinali , Abu Hasan Khondoker Mohammad
Published: August 2023

Natural resources play key roles not only in our personal daily life but also in modern industries and businesses. It is necessary to prevent the loss of natural resources, through waste-to-wealth principles. Recently, researchers demonstrated huge potential to generate electricity out of wastewater, enabled by microorganisms in microbial electrochemical cells. It was identified that the carbon nanomaterial-based electrodes with a higher surface area can significantly improve the performance of electrochemical conversion. Therefore, in this work, using 3D printing technology, electrodes with higher surface areas were manufactured where the effect of different lattice structures was tested. Also, computational analyses were performed to compare the pressure head losses due to different lattice structures in order to obviate damage to the cell membrane.
Parametric Optimization of Friction Stir Welding (FSW) of Dissimilar Aluminum Alloys with Newly Developed Tool
Authors: Hussain Arsalan , Usman Ali , Ausaf Farhan , Taj Samad Ali , Mourad Abdel Hamid Ismail
Published: August 2023

Friction stir welding is a rising solid-state material joining procedure which has revolutionized the world. It’s majorly utilized for joining aluminum and alike soft materials for industrial and commercial use. The present study comprised of experimental investigation of FSW operation parameters like tool rotational speed, tool transversal speed, and tool pin geometry profile on the tensile strength of friction stir welded joint between Al alloy 6061-T651 and Al alloy 5083-H321. Two newly developed pin profiles that are cylindrical quad slotted and cylindrical threaded quad slotted are used along with cyclindrical threaded tool pin profiles. Tool rotation speed selected for the operation are 600, 900 and 1200 revolution per minute and tool transversal speeds are 20, 40 and 60 milimetre per minute. Tools were produced from TS (Tool Steel) H-13. The FSW operation was conducted on vertical-axis milling machine. Tensile test, most widely used to experimentally varrify the strength of material is applied to check the weld strength performed through FSW. Taguchi design of experiment was used in order to investigate the optimum parameters with minimum number of experiments. Analysis of variance (ANOVA) and regression analysis are applied for evaluating the relative significance and importance of individual parameters affecting mechanical behavior of the weld joints. The result imply that tool’s pin geometry profile has a significant impact on the strength of weld joint cylindrical threaded quad slotted tool pin profile produced the best weld joints. This study also suggests that the increased motion of plasticized phase of Al in horizontal and vertical trajectory simultaneously, which was achieved with the help of cylindrical treaded quad slotted pin profile gives the best weld joint under the same circumstances in relation to other tools under studies. The study also suggests that best weld was achieved with highest tool rotational speed and lowest tool transversal speed.
Performance of Alkaline Water Electrolysis Cell in Generating Hydrogen-Oxygen Mixture Gas under Atmospheric Pressure
Authors: Ahmed Assem , Wardeh Majed , Sheikh Yahya , Emam Abdelrahman , Hamdan Mohammad O.
Published: August 2023

This paper focuses on evaluating the performance of an alkaline electrolysis cell. The work examined the effect of KOH concentration, applied voltage, electrode plate thickness, and electrode spacing. The results show that as the concentration of KOH increases from 1 g/L to 6 g/L, the efficiency increases from 47% to 57%. The results also show an optimal operating supply voltage of between 2.2 and 2.4 Volts. In addition, the results show that increasing the distance between the electrodes decreases both the efficiency and HHO generation.
Soft Actor Critic Swing Up of a Real Inverted Pendulum on a Cart
Authors: Humberto Calderon Raniero
Published: August 2023

The inverted pendulum, is a classical experiment widely used as a benchmark for research in control systems, due to its challenging dynamics. In this paper, Deep Reinforcement Learning is used to control a real inverted pendulum on a cart. The Soft Actor Critic algorithm with automatic entropy tuning is used to train an agent capable of acting as a controller. The agent is trained on real data collected on an episodic basis and learns to carry out the swing up control task successfully.
Electric Vehicle Battery’s State of Charge Estimation Using Extended Kalman filter and Heuristic Search Algorithms
Authors: Chhetri Abhay , Saklani Mayank , Kumar Saini Devender , Yadav Monika , Chandra Gupta Yogesh
Published: August 2023

It is known that the State of Charge (SOC) of an electric vehicle’s (EV) battery is the most essential parameter. It provides information about the battery's performance, allowing us to estimate the battery's charging and discharging capacities. Therefore, with an understanding of SOC characteristics, battery life, and EVs range can be enhanced. A variety of approaches to estimate the battery SOC % are presented in the literature, however, the filter-based method provides the most accurate results. This study provides an Extended Kalman Filter (EKF)-based SOC estimation coupled with other errorreduction strategies, including Particle Swarm Optimization (PSO), Genetic Algorithm (GA), and Battle Royale Optimization (BRO). The data used for this estimation is derived from the existing data model utilizing a Turnigy battery's LA92 drive cycle. It is observed that based on the given data set, the EKF provides an error percentage of 1.944% whereas, the proposed methodology of EKF with optimization technique especially PSO outperforms the EKF by attaining 1.8% error reducing the EKF SOC estimation error by 0.14%.
Thermophysical Properties of Carbide and Nitride Nanofluids
Authors: Ajeeb Wagd , Murshed S.M. Sohel
Published: August 2023

The total performance of a heat exchanger system is significantly influenced by the thermophysical (TP) characteristics of the used thermal fluids and especially for thermal nanofluids due to their complex design. In this study, three key TP characteristics for instance the density, specific heat capacity and the dynamic viscosity of a carbide and nitride thermal nanofluids, namely Silicon Carbide (SiC) and Boron Nitride (BN) based thermal nanofluids are experimentally and theoretically investigated. These thermal nanofluids are produced for four very low particle concentrations from 0.01 to 0.04 vol.% dispersed into ethylene glycol/water (EG/DW) mixture. The results indicate that these thermal nanofluids have higher density and dynamic viscosity in comparison with their conventional base fluid (EG/DW) and they increase with increasing concentration of the nanoparticles. The maximum increase in dynamic viscosity of 4.1% at 0.04 vol.% was found. On the other hand, the specific heat capacity of these thermal nanofluids insignificantly decreased with the increasing of nanoparticles concentration in comparison with the conventional base fluid.
Analyzing student perception on using webtoon as a learning medium for reading comprehension
Authors: Harpain  , Dameria Magdalena Sidabalok  , Anita
Published: August 2023

As is commonly understood, educational requirements, especially in Indonesia, necessitate students' mastery of English reading skills due to the consistent inclusion of reading assessments in examinations. However, the hurdles students often face in reading comprehension remain numerous, including challenges such as limited understanding of grammar usage and unfamiliarity with vocabulary meanings. To surmount these challenges, the provision of suitable learning tools becomes imperative. One effective tool for addressing these obstacles is Webtoon, an innovative comic platform originating from South Korea. Comics, through their blend of sentences, vocabulary, and illustrative depictions of character actions, offer an avenue for enhanced learning. Hence, Webtoon holds the potential as a medium to bolster students' reading comprehension abilities. The current study sought to delve into students' perceptions concerning the use of Webtoon as a learning aid for reading comprehension. Employing a qualitative approach, the research utilized questionnaires and interviews as data collection tools. The findings unveiled a prevailing positive inclination among students towards integrating Webtoon into their reading practices. This perception was gauged across various indicators such as interest, experience, emotional response, object color, and the nature of perceptions. Overall, these indicators showcased that a majority of students held a favorable view of using Webtoon for reading exercises. Their feedback indicated that engaging with Webtoon during reading activities was conducive to heightening their comprehension and fostering familiarity with the vocabulary employed.
Rezension von: Weyer, Jost, Graf Wolfgang II. von Hohenlohe und die Alchemie
Authors: Bienert Hans-Dieter , Weyer Jost
Published: August 2023

Jost Weyer, Graf Wolfgang II. von Hohenlohe und die Alchemie. Alchemistische Studien in Schloß Weikersheim 1587-1610 (Forschungen aus Württembergisch Franken 39), Sigmaringen (Thorbecke) 1992. 516 S., lausklappbare Stammtafel, 73Abb.
Rezension von: Frey, Siegfried, Das württembergische Hofgericht (1460-1618)
Authors: Weber Raimund J. , Frey Siegfried
Published: August 2023

Siegfried Frey, Das württembergische Hofgericht (1460-1618) (Veröffentlichungen der Kommission für geschichtliche Landeskunde in Baden-Württemberg B 113), Stuttgart (Kohlhammer) 1989. XXVIII, 242 S., 7 Urkunden-Reproduktionen, 2 Siegelabb.
Rezension von: Biller, Thomas, Die Adelsburg in Deutschland
Authors: Fritz Gerhard , Biller Thomas
Published: August 2023

Thomas Biller, Die Adelsburg in Deutschland. Entstehung, Form und Bedeutung, München (Deutscher Kunstverlag) 1993. 236 S., 100 Abb.
Rezension von: Bachmann, Harald (Hsrg.), Herzog Ernst II. von Sachsen-Coburg und Gotha, 1818 - 1893, und seine Zeit
Authors: Kohl Herbert , Bachmann Harald
Published: August 2023

Harald Bachmann u.a. (Hrsgg.), Herzog Ernst II. von Sachsen-Coburg und Gotha 1818-93 und seine Zeit. Jubiläumsschrift im Auftrag der Städte Coburg und Gotha, Augsburg (Maro) 1993. 488 S., Farbtafeln, zahlr. Abb.
Rezension von: Blätter zur Stadtgeschichte Bietigheim-Bissingen, Heft 8 (1991)
Authors: Bienert Hans-Dieter
Published: August 2023

Blätter zur Stadtgeschichte Bietigheim-Bissingen, Heft 8 (1991) (hrsg. vom Archiv der Stadt Bietigheim-Bissingen), Bietigheim-Bissingen 1991. 270 S., 86 Abb.
Rezension von: Schultheiß, Hans (Red.), Die Männer von Brettheim
Authors: Kohl Herbert , Schultheiß Hans
Published: August 2023

Hans Schultheiß (Red.), Die Männer von Brettheim - Lesebuch zur Erinnerungsstätte (hrsg. von der Landeszentrale für politische Bildung Baden-Württemberg), Villingen-Schwenningen (Neckar-Verlag) 1993. 176 S., zahlr. Abb.
Non-inflamed appendix with LAMN causing closed-loop small bowel obstruction
Authors: Maung Hein , Marino Matthew , Touma Fidel
Published: August 2023

Introduction: Low grade appendiceal mucinous neoplasms are generally encountered incidentally in appendicectomies for suspected appendicitis. This case is a documentation of a rare occurrence of LAMN presenting with small bowel obstruction.

Case Report: An 83-year-old male presented to the Emergency Department with a three day history of nausea, vomiting, and obstipation and profoundly dehydrated. Computed tomography revealed a high grade small bowel obstruction with 2 transition points in the right iliac fossa, concerning for closed loop obstruction, necessitating an urgent laparotomy.

Conclusion: While acute appendicitis is a common cause of emergency abdominal pathology, when coupled with small bowel obstruction, a neoplastic cause should be considered as part of the differential diagnosis.
Testing the wear of wheelsets of EN97 series vehicles in terms of geometrical parameters of the wheel profile in two-year operation
Authors: Sawczuk Wojciech , Rilo Cañás Armando Miguel , Kołodziejski Sławomir
Published: August 2023

The article presents the results of wheel wear tests of selected EN97 series electric multiple units. In the tests carried out on the 14 vehicles mentioned above, which were driven on the same route, geometrical parameters of the profile of all wheels were recorded during periodic inspections. The analyzed data concerned the period of over two years of use, when the vehicles were delivered from the manufacturer to the carrier as new. In the form of graphs, cases of exceeding a given parameter in relation to the requirements set in the Maintenance System Documentation are presented, broken down into individual wheelsets. The article presents the results of operational tests, which show which wheel set parameters (wheel diameter, rim steepness, rim thickness, rim height, etc.) are most often exceeded and which are least. The analyzes of the geometric parameters of the wheel profile on the tested group of vehicles, which were used on the same route in the same period, clearly prove that the parameters most often exceeded are wheel diameter and rim steepness. These two exceeded parameters were the basis for turning the wheelsets.
Prasangka Umum dan Realitas Hidup Mahasiswa Papua di Kota Malang dalam Teologi Praksis
Authors: Malla Crysan Dwiputra , Sudhiarsa Raymundus I Made
Published: August 2023

Studi ini berfokus pada makna serta kekhasan berteologi mahasiswa Katolik Papua di Malang. Sebagai pendatang (migran), mahasiswa Papua di Malang berhadapan dengan situasi dunia yang kompleks dan tentu tidak mudah. Di satu sisi, mereka tidak luput dari kesulitan-kesulitan dalam hal sosial, komunikasi, studi dan ekonomi. Di lain sisi, mereka adalah orang-orang beriman yang terus bergulat menghayati iman Katolik mereka. Metode yang digunakan dalam penelitian ini adalah metode kualitatif yakni studi kepustakaan dengan pembacaan dan interpretasi berteologi Praksis dari beberapa teolog seperti Stephen Bevans disertai data-data yang dapat memperkaya studi ini. Teknik pengumpulan data ialah dengan wawancara. Subyek yang menjadi sumber informasi dalam wawancara ialah para mahasiswa Katolik pendatang di Dekenat Malang. Pendekatan tersebut dipercaya mampu menunjukkan bahwa sebagai pendatang, mahasiswa Katolik khususnya mahasiswa Papua di Malang punya cara tersendiri dalam beriman. Sebagai orang asing, Mahasiswa Katolik Papua di Malang punya cara yang khas untuk mengekspresikan imannya dalam kesulitan hidup sehari-hari.
Analysis of the precision of different digital models of global and local elevations in continental Ecuador
Authors: Palacios Iván , Toulkeridis Theofilos
Published: August 2023

Currently, DEMs are inputs in multiple geoscience applications. Ecuador presents three regions with topographic characteristics that influence the performance of the DEM on altimetric precision. The main objective has been to analyze the precision of five global models and the official local model of the country, using GPS points to determine the level of adjustment of the DEM in the regions of Ecuador. The cities of Macas (Amazonian basin), Quito (Highlands) and Guayaquil (Coastal lowlands) were considered as study areas for each region. Statistics and spatial correlation / dispersion graphs were obtained with the R software, also with QGIS longitudinal profiles of the models were performed. According to the statistics calculated, the local SIG-TIERRAS model presents more auspicious results in the Highlands and Coast of the country, with an RMSE of 2,498, 1,556 meters, while in the Amazon the ALOS model is slightly better than the local DEM, with 5,792 meters of RMSE.
Análisis cartográfico de los incendios ocurridos en la vertiente sur del Parque Nacional Henri Pittier, Venezuela, entre 1990 y 2020
Authors: Ilianovich Miguel , Chadd Antonio , Rey Juan , Mendoza Naghely
Published: August 2023

Los incendios forestales representan una de las mayores amenazas a la biodiversidad de los ecosistemas, por lo que su control, con base en diferentes herramientas, es fundamental para lograr una vigilancia eficiente y garantizar la sostenibilidad ambiental para el futuro. En este estudio se cartografiaron los incendios ocurridos en la vertiente de sur del Parque Nacional Henri Pittier a partir de la clasificación supervisada de 9 imágenes satelitales mediante vectores de soporte entre 1990 y 2020. Se complementó la cartografía con datos del proyecto FIRMS, con relación al número de incendios ocurridos en la vertiente. Los resultados de los indicadores de validación demostraron una buena eficiencia del clasificador. Las áreas cartografiadas oscilaron entre 1,63 km² para 2015 hasta 39,22 km² en 2020. En este último año se registraron 287 incendios en contraste con 2017, que sólo registró uno. Se constató el año 2020 como el de mayor incidencia de incendios, asociado posiblemente a condiciones extremadamente secas y altas temperaturas. Se discute adicionalmente el papel antrópico en estos eventos.
Estrategias de adaptación campesina ante la variabilidad climática. Caso del café, municipio de Huehuetla, estado de Puebla, México
Authors: Apodaca Claudia , Juárez José , Ramírez Benito , Méndez José
Published: August 2023

En el sector cafetalero, la política agrícola y los cambios del clima están afectando su desarrollo y productividad. El objetivo de la investigación fue analizar las estrategias agrícolas implementadas ante la variabilidad climática por los cafeticultores de Huehuetla, Puebla. Se realizó un muestreo estadístico, se entrevistaron a 108 productores de café y se utilizó la técnica del cuestionario. La investigación mostró que los cafeticultores perciben cambios en el clima; ante ello, han implementado estrategias como reducir y modificar sus labores en el ciclo agrícola, introducido nuevas variedades resistentes a enfermedades, así como el uso de árboles de sombra y la diversificación de cultivos. Ello se refleja en un bajo índice de manejo tecnológico y producción. Se concluye que los cafeticultores han implementado estrategias de adaptación para reducir su vulnerabilidad ante la variabilidad climática y hacer frente a la crisis agrícola.
Evaluación del expediente clínico en un establecimiento de salud privado en Ocotepeque, Honduras
Authors: Marriaga Hernández Isaac Jonathan
Published: August 2023

Introducción. El llenado íntegro del expediente clínico es clave para una atención médica de calidad. El objetivo del estudio fue evaluar el llenado del expediente clínico en un centro atención médica ambulatoria del sector privado del departamento de Ocotepeque, Honduras, de enero de 2020 a junio de 2022. Métodos. El estudio fue cuantitativo, no experimental y de tipo transversal descriptivo. El universo se conformó por 3,904 expedientes clínicos. Se recolectaron datos de una muestra probabilística de 350 casos mediante un instrumento de elaboración propia. Resultados: El 87.9% de las atenciones tenían un registro parcial o deficiente en el expediente clínico (IC. 95%: 85.1 a 90.7%). Sobre la identificación del paciente y la temporalidad, en el 98.9% de las atenciones se registró la fecha completa, en el 29.7% la hora de atención con el médico y en el 85.0% el nombre completo del paciente. Del proceso de atención médica, se encontró que en el 48.9% de las atenciones médicas se consignó el nombre del médico responsable, en el 64.2% los signos vitales completos, y en un 89.2% el diagnóstico clínico. Conclusión. El llenado del expediente clínico de las atenciones brindadas en el establecimiento en estudio fue deficiente, lo cual inhabilita los numerosos beneficios que otorga al paciente, personal de salud y a la gerencia; incluida la calidad de la atención médica.
Variaciones estacionales en la vegetación riparia de la subcuenca “La Mula”, Norte de Costa Rica
Authors: Valladares Yefrin , Benegas Laura , Watler Reyes William Jefferson , Sepulveda Claudia , Valladares Néstor
Published: August 2023

Introducción. Las actividades agropecuarias y las anomalías atmosféricas representan un alto porcentaje de alteraciones en ecosistemas riparios, modificando rápidamente servicios ecosistémicos, como la pérdida de la calidad del entorno. Esta investigación midió el efecto de variaciones climáticas sobre el uso del suelo agropecuarios asociados a la zona riparia. Métodos. Con imágenes Lansat 8 y el preprocesamiento de estas en SAGA GIS, se realizó la extracción de datos del Índice de Diferencia de Vegetación Normalizada (NDVI, por sus siglas en inglés) por mes durante el 2022. Se procedió a realizar análisis estadísticos en RStudio para test Kruskal Wallis (KW). Dentro del método se analizaron los tipos de correlaciones existentes entre los datos atmosféricos y los NDVI. Resultados. La dispersión de los datos en usos de suelo y vegetación adyacente (Va) presentaron valores similares a lo largo del año, considerando que esta última (Va) mostraron valores asociados a vegetación media. Datos del test KW indicaron un p = 0.0016 refutando la existencia de diferencias entre los usos del suelo y la Va. Posteriormente el test post hoc indicó que estadísticamente las diferencias únicamente fueron Vegetación adyacente a Ganadería (Va-G)/ Caña (C), Va-G/ Sandía (S) y Ganadería (G) /C. Por otra parte, el NDVI en G fue inversamente proporcional a la temperatura (rho= -0.62, valor de la correlación negativa entre el uso del suelo y la temperatura). Conclusión. En muchos de los casos, la Va a usos de suelo como Pastizales (P), S y C no presentó diferencias significativas. Un análisis comparativo entre el conjunto de datos indicó que G y Va-G fueron suelos con mejor estado de la vegetación en la subcuenca La Mula.
Disponibilidad de alimentos ultraprocesados como amenaza latente en la nutrición de los niños latinoamericanos
Authors: Padilla-Sánchez Gissel , Madriz Narriman , Guardado Walter , Hernández Adriana
Published: August 2023

La industria alimentaria produce ampliamente alimentos ultraprocesados, con alto contenido en calorías vacías, es decir, su aporte nutricional se limita a proporcionar energía y carecen de nutrientes como proteínas, minerales, fibras y vitaminas. Este tipo de alimentos presentan cantidades considerables de aditivos, preservantes, colorantes y, en consecuencia, tienen una baja calidad nutricional. Algunos ejemplos de estos alimentos son cereales, bebidas azucaradas, alimentos instantáneos y/o congelados, embutidos y frituras. Los alimentos ultraprocesados son atractivos, duraderos, de sabor agradable, altamente rentables y desplazan el consumo de los alimentos naturales y apropiados para la dieta humana. Esto ocurre especialmente en los niños, quienes se encuentran en una etapa vital de crecimiento y desarrollo.
La seguridad alimentaria y la sostenibilidad medio ambiental de México. Una revisión
Authors: Ortega-Marín Blanca Andrea , González-Rosas Angelina
Published: August 2023

Introducción. En las últimas cuatro décadas, más de la mitad de la población mexicana transitó a la pobreza, vulnerabilidad y carencias en alimentación, vivienda, educación y/o salud. En particular, la falta de alimentos se ha profundizado en los últimos años, disminuyendo aún más desde la pandemia COVID-19 y amenazando con continuar afectando a la seguridad alimentaria. La presente revisión se enfocó en identificar la situación de los recursos naturales, así como las estrategias de atención de la seguridad alimentaria y sostenibilidad medio ambiental en México de 1990-2020. Métodos. Se llevó a cabo una búsqueda documental académica e institucional de políticas públicas y programas, respectivamente. Desarrollo. Se encontró información sobre la disponibilidad y calidad de los recursos naturales, así como de las diversas acciones para atender las necesidades de los recursos naturales y disminuir los efectos de la alteración de la calidad y cantidad de los mismos, sin especificar las zonas atendidas y las pendientes, así como la problemática jurídica de la población rural. Conclusión. Se necesitan estudios por región geográfica, clima y situación de los recursos naturales, con la participación de la población rural, productores agropecuarios, indígenas, instituciones educativas y operadores de las políticas públicas para definir estrategias -por nivel de requerimiento y a largo plazo-.  Estos estudios deben consolidar los esfuerzos desarrollados en la seguridad alimentaria y paralelamente en la sostenibilidad de los recursos naturales biodiversos y así garantizar la vida misma del Planeta Tierra.
Repositioning the Trademark Registration and Opposition Proceedings in Nigeria for Greater Efficiency: A Call for Legislative Intervention
Authors: Onyilo Abounu Peter
Published: August 2023

In the world of increasing globalization and the aggressive growth of the creative economy, the importance of intellectual property (IP) to ensure freedom of fair competition and respect for honesty in trade cannot be overemphasized. Trademarks are important components of the IP system which have strong influence on investment and marketing decisions. Protected trademarks are granted monopolies by government and enforced by the courts in favor of merchants who reserve them. Save in exceptional circumstances, trademarks are protected through registration. The Nigeria Trademark Act makes provisions for guidelines and procedure for the registration of trademarks and opposition thereto. However, it is doubtful if the Nigeria Trademark Act and its Regulations made almost six decades ago are still in conformity with the global trends in trademark registration and opposition proceedings. Therefore, this work seeks to examine trademark registration and opposition in Nigeria in the light of practical realities with a view to suggest ways for improved effectiveness and efficiency. The paper adopted doctrinal research approach. The main sources of information and data collection for this study were the relevant statutes, case laws, textbooks, articles and the internet. The work found that it is imperative to improve trademark registration and opposition proceedings in Nigeria in consonance with the universal trends in trademark practice and administration. The paper recommended inter alia, for the amendment of the Trademark Act and Regulations with a view to establishing a full-fledged trademark tribunal with its composition, powers, finances and administration for expedited opposition hearing process.
Pelatihan Kewirausahaan Bagi Warga Desa Ponco Kresno Kecamatan Negeri Katon Kabupaten Pesawaran Sebagai Upaya Menumbuhkan Jiwa Kewirausahaan dan Menggali Ide Usaha Baru
Authors: Purnama Husna , Z Bustami , Ahmaludin Ahmaludin , Hifni Iskandar Z. , Solo Gunawan
Published: August 2023

Seorang wirausahawan yang berhasil adalah impian banyak orang. Sungguh enaknya dapat menjadi seorang bos bagi diri sendiri dan bekerja sesuai dengan cara anda sendiri berpikir. Survei menunjukkan bahwa bekerja sesuai dengan cara anda sendiri berpikir. Survei menunjukkan bahwa orang-orang yang mendirikan bisnis mereka dan berhasil, mampu mendapatkan lebih banyak uang daripada mereka yang bekerja untuk orang lain dan mempunyai gaji dalam jangka panjang.Kegiatan Pelatihan Kewirausahaan bagi Warga Desa Ponco Kresno Kecamatan Negeri Katon Kabupaten Pesawaran secara umum berlangsung dengan baik, hal ini ditunjukkan dengan: 1) tumbuhnya spirit, motivasi, dan kreativitas Warga Desa Ponco Kresno Kecamatan Negeri Katon Kabupaten Pesawaran untuk menggali ide potensi usaha; 2) dapat disusunnya business plan usaha baru yang akan dikembangkan oleh Warga Desa Ponco Kresno Kecamatan Negeri Katon Kabupaten Pesawaran.
Using the Podcast Contents to Help EFL Students in Improving Their Grammar and Pronunciation
Authors: Suseno Edy
Published: August 2023

The study aims to determine how the teacher uses podcast resources to improve the students' grammar and pronunciation learning. Many EFL students struggle to use good grammar and practice pronunciation. By addressing their weaknesses, they needed to hone their public speaking abilities. To accomplish this, twelve college students joined a treatment program that used podcasts to address this problem. The teacher created a social media group to facilitate the teaching and learning process and to improve the learning of the online course materials. After finishing it, he instructed students on how to study grammar while bilingual. The students finished the lecture and the assignment in both languages. The teacher posted a URL on a forum to help the students more naturally understand grammar usage. The students click on, and a podcast page appears on their screen. To hear the speaker's voice, they push the play button. They read the transcript as they listened to the voice.  They concentrated on getting the transcript done. The corresponding grammatical content was looked for in each line of the text.  The words and phrases related to the grammar being studied were highlighted. they visualized uploading their work. The instructor then requested that the students read the transcript aloud for recording and upload. The teacher then evaluated all of the uploaded work in order to offer comments. The information was acquired by keeping an eye on the teaching-learning process. The conclusion was then reached after qualitative analysis. According to the study, podcasts can improve pronunciation and structure learning. The teachers can use the findings to teach connected disciplines. The other researchers can also complete the further related work.
The Environment Conscious Habitat
Authors: Beri Shirish
Published: August 2023

The environment conscious habitat is a design approach that takes into account the various undercurrents of the existing environment in which a building or development is being created. These undercurrents may include site characteristics, climate, economic factors, energy, social considerations, and available technology. The goal of the environment conscious habitat is to modify the environment in a way that positively responds to these undercurrents, rather than clashing with them. This can be achieved through various types of environmental responses, such as physical environment response (including site contours, existing trees and rocks, and surrounding views), climatological environment response (including wind, rain, and sun), economic environment response (including initial and recurring expenditure, cost of maintenance, and impact on the local economy), and social environment response (including consideration of local culture, lifestyles, and needs). By taking a holistic approach to design that considers the existing environment, designers can create spaces that are not only functional and efficient, but also in harmony with their surroundings.
RESPON PAKISTAN TERHADAP PENCABUTAN STATUS OTONOMI KHUSUS KASHMIR OLEH INDIA TAHUN 2019
Authors: Yudistira Dwiki , Pasan Etha , Wahyu Frentika
Published: August 2023

Pada tahun 1948, India memutuskan untuk memberikan status otonomi khusus kepada Kashmir yang tertulis dalam Konstitusi India Pasal 370 dan 35A. Pada bulan Agustus 2019, India memutuskan untuk mencabut status otonomi khusus Kashmir karena sering terjadi konflik di wilayah Kashmir yang tidak dapat diselesaikan oleh pemerintah lokal Kashmir. Kebijakan ini membuat beberapa negara dan organisasi internasional memberikan tanggapannya. Pakistan adalah satu-satunya negara yang merespons dengan meningkatkan eskalasi konflik dan memperburuk hubungan kedua negara tersebut. Hasil dari penelitian ini adalah respon yang diberikan Pakistan ada empat, yakni penyampaian surat oleh Pakistan kepada Dewan Keamanan PBB, Penghentian hubungan dagang, penghentian layanan kereta api dan penurunan hubungan diplomatik
Implementasi Peraturan Presiden No. 31 Tahun 2015 Terhadap Sistem Transportasi Darat Pulai Sebatik
Authors: Salsabila Nur'annisa , Mulyani Sari
Published: August 2023

Perbaikan sistem jaringan transportasi darat di Pulau Sebatik di laksanakan dengan dua program yaitu: perbaikan jalan lingkar dan perbaikan pelabuhan penyeberangan atau biasa disebut Pelabuhan Sei-Nyamuk. Perbaikan Sistem Jaringan Transportasi Darat ini bertujuan untuk menjaga keamanan ekonomi dan sosial masyarakat perbatasan yang mana dengan demikian diharapkan akan berpengaruh pada keamanan dan kedaulatan negara di Pulau Sebatik.
FAKTOR PENDORONG INTERVENSI MILITER ARAB SAUDI DALAM KONFLIK YAMAN
Authors: Purwono Andi , Sholihul Ahmad
Published: August 2023

Pada tahun 2014, pemberontak Houthi berhasil menguasai ibukota Yaman, Sana’a. Hal ini menyebabkan terjadinya instabilitas di Yaman dan membuat negara-negara tetangga Yaman menjadi terganggu, salah satunya Arab Saudi.Penelitian ini bertujuan untuk mengetahui dan menganalisis kepentingan nasional Arab Saudi melakukan intervensi dalam konflik Yaman yang dipimpin oleh Abdur Rabbuh Mansour Hadi, yang sedang berperang melawan pemberontak Houthi. Metode yang digunakan dalam penelitian ini adalah deskriptif kualitatif, dengan menggunakan data skunder sebagai sumbernya dan dilengkapi dengan teori kepentingan nasional yang dikemukakan oleh Donald E. Neuchterlein. Teknik pengumpulan data yang digunakan adalah studi pustaka. Hasil dalam penelitian ini menyebutkan bahwa intervensi militer yang dilakukan oleh Arab terhadap Yaman didorong oleh adanya kepentingan nasional meliputi kepentingan pertahanan, kepentingan ekonomi, kepentingan tatanan dunia, dan kepentingan ideologi.