bluuebunny/crossref_metadata_2025 huggingface dataset:
Peningkatan Kualitas Perawatan Bayi dengan Berat Badan Lahir Rendah di Dusun Pengadok, Desa Mantang
Authors: Komalasari Nova Silpia , Ningsih Nining Fatria , Wahyuni Ervin Dini
Published: January 2025

Neonatal mortality, particularly caused by low birth weight (LBW) infants, remains a significant health issue in many countries. This study aims to improve the quality of care for LBW infants through education for parents and the involvement of posyandu cadres in Dusun Pengadok, Desa Mantang. The methods used included providing education on LBW infant care techniques, such as kangaroo care and exclusive breastfeeding, as well as enhancing the role of posyandu cadres in monitoring and supporting families. The results of the community service showed a significant increase in the average weight gain of infants after the intervention, as well as improvements in care practices by parents. Furthermore, the involvement of posyandu cadres in monitoring the infant's development on a regular basis proved to be effective in improving care quality. Although there were some challenges, such as time constraints for working parents, these results demonstrate that collaboration between parents and posyandu cadres can improve the quality of care for LBW infants and potentially reduce infant mortality rates. This program provides an important contribution to improving the health of LBW infants and can be replicated in other areas with similar issues.
Gerakan Peduli Gizi: Pencegahan KEK pada Ibu Hamil Trimester I di Dusun Tundung, Desa Mantang, Lombok Tengah
Authors: Afriani Nur , Ningsih Nining Fatria , Wahyuni Ervin Dini
Published: January 2025

Chronic Energy Deficiency (CED) in pregnant women is a significant nutritional issue in Indonesia, including in Dusun Tundung, Desa Mantang, NTB, with a prevalence of 17% in the first trimester of pregnancy. Addressing CED through nutritional education and community empowerment is crucial to reduce the risk of pregnancy complications. The aim of this study is to improve the nutritional status of pregnant women and reduce the prevalence of CED through nutrition-based interventions. The method used is descriptive-qualitative with active community participation. The subjects of the study were 25 pregnant women at risk of CED. The results showed an average weight gain of 1.5-2 kg, an increase in the proportion of pregnant women with normal nutritional status from 40% to 68%, and a decrease in the prevalence of CED from 28% to 12%. Active family participation in preparing nutritious menus and the use of audiovisual educational media played a key role in the success of the program. In conclusion, community-based nutrition education programs are effective in improving the nutritional status of pregnant women and reducing the prevalence of CED in high-risk areas.
Study of a Lyapunov-based discretization method using the midpoint approach
Authors:   Instituto Potosino de Investigación Científica y Tecnológica A.C., México, Silva Cristina , Sanchez Tonametl ,   Instituto Potosino de Investigación Científica y Tecnológica A.C., México, Lizárraga Navarro David A. ,   Instituto Potosino de Investigación Científica y Tecnológica A.C., México, Zavala-Río Arturo ,   Instituto Potosino de Investigación Científica y Tecnológica A.C., México
Published: January 2025

We propose a modification of an existing discretization technique. The technique we atempt to improve is a discretization method designed for homogeneous systems, characterized by first-order consistency, numerical convergence, and the noteworthy feature of preserving both the stability of the system’s equilibrium point and the type of convergence of the solutions toward the origin. Its design is based on the projection of the dynamics of the system over a level surface of the Lyapunov function, and the complementary use of the explicit Euler method. In this work the Euler’s explicit method is replaced by the midpoint method, and it is proved that, with such a change, the discretization methodology continues to preserve both the Lyapunov function and the type of convergence exhibited by the solutions of the original system. Furthermore, it is proven that this new approach improves the accuracy of the method since it can achieve second-order convergence.
Synchronization of Bidirectionally Coupled Nonidentical Systems Via Output Feedback
Authors:   Instituto Potosino de Investigación Científica y Tecnológica A.C., México, Barajas-Ramírez Juan Gonzalo , González-Hernández Hugo G. ,   Tecnológico de Monterrey, México
Published: January 2025

We investigate the synchronization of bidirectionally coupled nonidentical chaotic systems. We propose a design of their coupling to achieve synchronization that takes into consideration the variable structure nature of the systems, and guarantees the stability of an identical synchronization manifold for nonidentical systems using output feedback linearization. We illustrate our results with numerical simulations of well-known benchmark chaotic systems.
An LMI-Based Output Regulation of Discrete-Time Nonlinear Descriptor Systems
Authors:   Universidad Politécnica de Pachuca, México, Estrada-Manzo Víctor , Santillán Raúl ,   Universidad Politécnica de Pachuca, México, Ortiz Nery ,   Universidad Politécnica de Pachuca, México, Hernández-Cortés Tonatiuh ,   Universidad Politécnica de Pachuca, México
Published: January 2025

This work proposes a discrete-time output regulator for nonlinear descriptor systems. The approach consists in two parts: 1) the design of a convex nonlinear stabilizer computed by means of the so-called non-quadratic Lyapunov functions, 2) the design of a linear regulator computed through the so-called Francis equations for descriptor models; the designing conditions of both parts are in terms of linear matrix inequalities. The effectiveness of the proposal is illustrated via numerical examples.
Synchronized estimation of displacement in a structure using multi-sensors under different sampling periods
Authors:   Tecnológico Nacional de México, Hermosillo, México, Hernández González Omar , Guerrero-Sánchez María-Eusebia ,   Tecnológico Nacional de México, Hermosillo, México, Castro Gómez José Fernando ,   Tecnológico Nacional de México, Hermosillo, México, Valencia-Palomo Guillermo ,   Tecnológico Nacional de México, Hermosillo, México, Galicia Galicia Laura Adriana ,   Tecnológico Nacional de México, México, García Beltrán Carlos Daniel ,   Tecnológico Nacional de México, México
Published: January 2025

This paper presents an estimation algorithm based on a synchronized observer, using homogeneous sensor fusion for a linear system in the presence of multiple sampling periods, whether periodic or aperiodic. This allows for the fusion of a single continuoustime estimation applied in a vertical building-like structure. Additionally, the multisensors are affected by different measurement noises. The designed algorithm is validated on a two-story vertical building structure with multisensors that have different sampling rates and significantly large sampling intervals for the system, aiming to reduce the effects of noisy signals. The effects of multiple sampling and noise are very real issues in monitoring systems.
Discretization of Models for Electrical Microgrids Preserving Passivity Properties
Authors:   Universidad Nacional Autónoma de México, México, Avila-Becerril Sofia , Garcés-Ruiz Alejandro ,   Universidad Tecnológica de Pereira, México, Espinosa-Pérez Gerardo ,   Universidad Nacional Autónoma de México, México
Published: January 2025

This paper presents a Hamiltonian model of a direct current microgrid consisting of rectifiers connected in parallel in closed-loop with a Droop-type power-sharing algorithm. The main contribution is to demonstrate that a discretization using the backward Euler method preserves the microgrid’s Hamiltonian structure and passivity properties with a simple implementation of the method. The results are numerically evaluated by comparing the backward and forward Euler methods.
An Evaluation of the Current Tracking PBC for Switched Reluctance Motors
Authors:   Universidad Nacional Autónoma de México, México, Escobar Tufiño Miguel Angel , Ramos-García Fernanda ,   Universidad Nacional Autónoma de México, México, Espinosa-Pérez Gerardo ,   Universidad Nacional Autónoma de México, México
Published: January 2025

In this paper the problem of current tracking control for the three phases Switched Reluctance Motor (SRM) is approached from the Passivity Based Control (PBC) perspective. The methodology applied has two important steps; the first one is to analyze the system structure of the simplified Euler-Lagrange mathematical model of the SRM system, which allows the decomposition of the electrical and mechanical subsystems. Exploiting this property, the key to the control design is on the interconnection of the subsystems; where the current control is designed for the electrical subsystem and the mechanical subsystem, due to its passivity properties, can be considered as a passive perturbation. Also, it is proven that the angular velocity of the motor is bounded, therefore the mechanical subsystem is also bounded. To validate this result, a numerical evaluation is made with a Matlab/Simulink simulation performed with parameters of a three phase SRM 12/8 Emerson Electric Co.
Dynamic Regressor Extension and Mixing Parameter Estimators-A Comparative Simulation Study of the Quadrotor System
Authors:   Instituto Tecnológico Autónomo de México, México, Rodríguez-Cortés Hugo , Ortega Romeo ,   Instituto Tecnológico Autónomo de México, México, Romero Jose-Guadalupe ,   Instituto Tecnológico Autónomo de México, México
Published: January 2025

In this paper we present a comparative numerical simulation study of three dynamic regressor extension and mixing estimators applied to the quadrotor system. Our main objective is to compare the transient performance of these three parameter estimators a topic that plays a major role in parameter estimation tasks. Our study goes beyond verifying theoretically validated (asymptotic) properties. We delve into aspects not previously explored, such as sensitivity to tuning parameters, focusing specifically on a quadrotor dynamic model. The ultimate goal of this study is to provide useful design guidelines for the unmanned aerial vehicles community interested in utilizing these estimators.
Nonlinear Model Predictive Control for Pose Regulation Robot and Obstacle Avoidance
Authors:   Universidad Iberoamericana León, México, Aldana Noé , Ramirez Rocha Axel ,   Universidad Iberoamericana León, México, Martínez Edgar Daniel ,   Centro de Investigación en Matemáticas, México, Ovalle Magallanes Emmanuel ,   Universidad La Salle Bajío, México
Published: January 2025

The present work addressed the problem of autonomous navigation of wheeled mobile robots, specifically the Differential Driving Robot (DDR). The DDR kinematic model is nonlinear, which requires adequate automatic control strategies for good performance in autonomous navigation. The variables of the DDR mathematical model are the robot’s position expressed in a global Cartesian reference frame, its orientation, its linear speed, and its angular speed. It was proposed that the navigation problem of a DDR be solved by following a reference trajectory using model-based nonlinear predictive control. In addition, a potential field algorithm was added for obstacle avoidance. Experiments were carried out in a dynamic simulator. Several simulations provided convincing evidence of the feasibility of implementing a real robot using the proposed approach.
Design and Control of a Bidirectional Active Front Converter Validated by Hardware-in-the-Loop
Authors:   Universidad Popular Autónoma del Estado de Puebla, México, Bonilla Barranco Héctor , Peralta-Sánchez Edgar ,   Universidad Popular Autónoma del Estado de Puebla, México, Cardeña-Moreno Sergio Alejandro ,   Universidad Popular Autónoma del Estado de Puebla, México, Méndez Díaz Juan Francisco ,   Universidad Popular Autónoma del Estado de Puebla, México, Ramírez Leyva Fermín Hugo ,   Universidad Tecnológica de la Mixteca, México
Published: January 2025

This paper addresses an application of Voltage Oriented Control (VOC) for a Three-Phase PWM Rectifier to achieve bidirectional power flow control. Theoretical analysis is provided to establish the requirements for operating the converter as a fully controlled rectifier or as a power inverter connected to the grid. The control and converter operation are validated through real-time emulation using a Hardware-in-The-Loop system (Typhoon HIL 402) and the TMS320f28335 DSP. Based on the results, the advantages, and disadvantages of employing VOC control for bidirectional converters are discussed.
Multifault Observer Based Detection Method for Brushless DC Motors
Authors:   Universidad de las Américas Puebla, México, De La Guerra Alejandra , Gutiérrez-Giles Alejandro ,   Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis Enrique Erro 1, México
Published: January 2025

A detection and identification method for high resistance connection faults and open phase fault in Brushless DC motors is presented. The method uses the current and speed residuals to detect the type of fault, the faulty phase and the severity of the fault in the case of high resistance connection. The residuals are made by comparing the measured signals and their estimates. These estimates are obtained with an observer which reconstructs the stator currents using only the rotor position signal. An observability analysis is included to show that it is possible to reconstruct the currents from the position measurement. Numerical simulations are presented to validate the proposed fault detection scheme.
Development and Validation of the Mathematical Model of an Experimental Platform for Heat Transfer Processes
Authors:   Universidad Nacional Autónoma de México, México, Mujica-Ortega Hoover , Robledo-Castillo Rodrigo ,   Universidad Nacional Autónoma de México, México, Morales Valdez Jesús ,   Universidad Nacional Autónoma de México, México
Published: January 2025

In this article, the development of a mathematical model expressed in a system of nonlinear ordinary differential equations that describes the dynamics of an experimental platform for heat transfer processes is presented. To validate how closely the model’s dynamics approximate reality, 10 experiments were conducted under different scenarios where both the mathematical model and the real platform received the same stimulus. Using the values acquired by the industrial controller as a reference and comparing them with the simulated values, validation was performed using the CV (RMSE) error as a metric. It was established that, for the simulation of each temperature to be acceptable, this error should not exceed the 20% limit in the experiments conducted. Based on the validation metric values obtained, it was concluded that the mathematical model developed in this work adequately represents the real process and allows simulation of the system’s two most relevant states. Therefore, the model an be used to evaluate control strategies on the platform and understand physical behaviors in heat transfer processes.
Evaluation of defects in the GMAW robotic welding process through color analysis
Authors:   Universidad Autónoma de Coahuila, México, Gómez Josué , Olivo Hernández Melissa ,   Universidad Autónoma de Coahuila, México, Zambrano León ,   Universidad Autónoma de Coahuila, México, Ortiz Ramos Daniela Estefanía ,   Universidad Autónoma de Coahuila, México, Muñiz Valdez Carlos Rodrigo ,   Universidad Autónoma de Coahuila, México, Hernández-Flores Jorge Eduardo ,   InnovaBienestar de México, México
Published: January 2025

In industry, the evaluation of the quality of welded joints is important to meet the required quality and safety standards. In a general context, identifying defects and porosities in the welding process requires a comprehensive inspection using different methods, such as non-destructive and destructive tests. In addition, welding inspectors require special training and certifications to perform efficient welding inspection. In this paper, we propose to analyze welding through computer vision techniques as an auxiliary tool for identifying defects in coatings. It is proposed to perform a color analysis for the segmentation of defects generated during the welding process found in ASTM A36 steel plates coated in stainless steel 308, using the GMAW robotic process. Automation through computer vision offers an alternative tool to identify and classify welding defects by color segmentation in a database of micrographs. At the end of the process, it is concluded that the HSV and YCbCr color spaces achieve better se mentation of defects in the samples, such as lack of fusion and porosities.
Relative Strength of Common Fixed Point Results for Two Self Mapping in Fuzzy Metric Space
Authors: Tiwari Surendra Kumar , Agrawal Ranu
Published: January 2025

The concept of fuzzy metric space, which was introduced by Kramosil and Michalek (1975), is used in this article. In this manuscript, we present and generalize some common fixed point theorems in fuzzy metric spaces, which is an extension of the well-known results given by shen, Y. et al. (2012) in the sense of Schweizer and Sklar(1983).
Development of the Meatball Business in Mutiara District, East Kisaran City
Authors: Dardanila Dardanila , Lubis Rosliana , Ariani Farida
Published: January 2025

The purpose of this activity is to develop the meatball sales business by improving production efficiency and empowering entrepreneurial skills, thus supporting the achievement of SDG 8, namely decent work and economic growth. Meatball business is a popular form of entrepreneurship and has many customers. The partner in this activity is a meatball business owner located on Jalan Sultan Alisabana, Mutiara Village, East Kisaran City. Based on interviews with the business owner, two main problems were found: firstly, the absence of entrepreneurship training attended by the business owner, which hinders the development of their business, and secondly, the absence of a meatball molding tool which causes delays in production, especially during times of high demand. To overcome these problems, the methods used include surveys, location determination, FGDs with local communities, procurement of equipment, and training and mentoring related to the use of meatball molding machines. The results of this activity provide partners with an understanding of how to become better entrepreneurs and how to use meatball molding equipment to increase production efficiency. The use of the meatball molding machine succeeded in increasing the amount of production and speeding up the process of making meatballs. This activity also received a positive response from the community because it facilitates the production process and has the potential to increase partner income. Overall, this activity succeeded in improving the partners' production quality and entrepreneurial skills, as well as contributing to local economic growth.
Integrasi Building Information Modeling (BIM) terhadap Kesiapan Lulusan Teknik Sipil Menghadapi Transformasi Digital di Industri Konstruksi
Authors: Setiyono  , Rahardianto Trias
Published: January 2025

The development of digital technology has transformed the landscape of the construction industry, and one of the most important innovations in recent years is the implementation of Building Information Modeling (BIM). BIM provides solutions to enhance efficiency in the design, construction, and management of construction projects. This research explores the impact of integrating BIM into the civil engineering curriculum on students' readiness to face the challenges of an increasingly digitized construction industry. Through a quantitative and qualitative approach, this research uses pre-test and post-test to measure changes in students' competencies in using BIM after participating in the training. Three groups of civil engineering students were tested to measure their level of understanding before and after the BIM training. The research results show a significantincrease in post-test scores compared to pre-test scores in all three groups, with an average improvement of 24.7%. These results indicate that the integration of BIM in education can be effective in enhancing students' professional readiness and bridgingthe gap between academic theory and the practical demands of the modern construction industry. This study suggests that BIM should be more widely integrated into the civil engineering curriculum to prepare graduates who are ready to compete in the era of construction industry digitalization.
Kelayakan Buku Pengayaan Berbasis Penelitian: Pengaruh Dosis Kalium (K) terhadap Performansi Genotipe Kedelai Tahan Cowpea Mild Mottle Virus (CpMMV)
Authors: Tyas Intan Lestari Mulyaning , Siti Zubaidah  , Heru Kuswantoro
Published: January 2025

This research was conducted to facilitate the availability of additional information for students at Agriculture vocational schools of valid enrichment books, which can support the implementation of enrichment programs so information more relevant, contextual and focused on learning objectives. The enrichment book was developed based on the use of varying doses of Potassium (K) in CpMMV-resistant soybean plants. The development model used is ADDIE, and this enrichment book has been tested for the feasibility of its material aspects, presentation, language and graphics by validators. The overall average score of the validation results was 88.45 with the meaning of very good, with details: material aspect 91.7 (very good), presentation 88.7 (very good), language 84.7 (good), graphics 88.7 (Very good). The enrichment book that has been developed is declared feasible and ready to be used in learning activities, especially enrichment programs in at Agriculture vocational schools.
Quantitative Analysis of the Effect of Marketing Networks in Increasing Sales and Market Share in Indonesia Case Study on the E-commerce Industry
Authors: Mardiani Eri , Utami Eva Yuniarti , Suwarna A Idun , Hamizar Arizal , Tubalawony Jacsy
Published: January 2025

This research investigates the intricate dynamics between marketing network strategies, sales performance, and market share in the Indonesian e-commerce industry. Employing a quantitative research design, the study integrates descriptive statistics, correlation analysis, and multiple regression analysis to discern the impact of social media marketing, influencer collaborations, affiliate marketing, and traditional advertising. The findings, based on survey data collected from consumers and e-commerce businesses, reveal influencer collaborations as a pivotal driver, with social media marketing and affiliate marketing playing complementary roles. Traditional advertising faces challenges in the contemporary landscape. These insights offer actionable guidance for businesses seeking to optimize their marketing strategies in the rapidly evolving Indonesian e-commerce ecosystem.
The Growth of Green and Sustainable Finance in Islamic Banking: A Bibliometric Approach
Authors: Bekti Utomo Bekti , Sudarmanto Eko , Muhammadong Muhammadong
Published: January 2025

This study employs a bibliometric analysis to explore the intersection of Islamic banking and sustainable finance, focusing on the integration of environmental, social, and governance (ESG) criteria into Islamic financial practices. Utilizing data from Google Scholar, this research maps the landscape of green and sustainable finance within Islamic banking from 2001 to 2024. The analysis identifies core themes such as green sukuk, ESG investing, and climate finance, and examines their connectivity and evolution over time. The results reveal a growing emphasis on aligning Islamic finance with global sustainability goals, highlighted by the increasing prominence of green financial instruments and sustainability-focused financial services. However, challenges such as the need for standardized regulatory frameworks and greater incorporation of technological innovations in financial practices persist. The study suggests that addressing these challenges through clearer guidelines and enhanced financial technology could propel Islamic banking into a more significant role in global sustainability efforts.
Postdocs Demanding Better—Together
Authors: Cataldi Stefano
Published: January 2025

A successful unionization effort among Columbia University’s postdoctoral researchers tackles bullying and financial disparities so that researchers can focus on science.
Reconsidering Research Security
Authors: Gannon John C. , Meserve Richard A. , Zuber Maria T.
Published: January 2025

Research security isn’t only about defending against external threats; it also requires ensuring that the United States remains a leader in global innovation by supporting the people and infrastructure that fuel it.
Our Bases Are Precarious!
Authors: von Hardenberg Wilko
Published: January 2025

Sea level rise has become a standard indicator of how humans are transforming the planet. But our ideas about sea level, why we measure it, and how it varies have changed radically over the centuries.
Perlindungan Dan Tanggung Jawab Hukum Kebocoran Informasi Data Pribadi Pada Penyelenggara Sistem Elektronik Berdasarkan Perspektif Rahasia Dagang
Authors: Fitria Myrna , Iryani Dewi , Hari Setiawan Puguh Aji
Published: January 2025

Penyelenggara Sistem Elektronik (PSE) dalam kasus kebocoran data pribadi berdasarkan perspektif rahasia dagang. Data pribadi yang dikelola oleh PSE sering kali memiliki nilai ekonomi yang signifikan, sehingga kebocoran data tidak hanya merugikan privasi individu tetapi juga dapat mengancam rahasia dagang perusahaan. Melalui pendekatan yuridis normatif, penelitian ini mengkaji bagaimana Undang-Undang Perlindungan Data Pribadi (UU No. 27 Tahun 2022) dan Undang-Undang Rahasia Dagang (UU No. 30 Tahun 2000) mengatur perlindungan serta tanggung jawab PSE dalam melindungi data pribadi dan rahasia dagang. Undang-Undang Perlindungan Data Pribadi menyediakan kerangka hukum yang cukup komprehensif, pelaksanaan dan penegakannya masih menghadapi beberapa tantangan signifikan. Kewajiban untuk memberikan kompensasi kepada pihak yang terdampak juga belum diatur secara jelas, sehingga berpotensi menimbulkan perbedaan standar ganti rugi di berbagai kasus. Perlindungan rahasia dagang yang berkaitan dengan data pelanggan atau informasi bisnis strategis sangat penting untuk mempertahankan keunggulan kompetitif di pasar. Penelitian ini menyarankan adanya peningkatan dalam kerangka regulasi dan kepatuhan untuk membangun lingkungan perlindungan data yang lebih kuat guna menjaga privasi individu sekaligus melindungi kepentingan bisnis.
Semiotic Analysis of Rolan Barthes on the Movie Poster "Like and Share"
Authors: Nazwa Rifda Apriliani , Wenerda Indah
Published: January 2025

The film Like and Share discusses sexual violence against women who are still in school and experience a lot of pressure. The purpose of this study is to examine the visual semiotics of the Like and Share poster through Roland Barthes' theory by dissecting the meaning of signs into denotations, connotations, and myths on the Like and Share movie poster. Not only looking at the poster from the visual side, but also understanding more deeply about the important issues facing teenagers today.   This study uses a qualitative descriptive method in analyzing and interpreting meaning. In this analysis, marks can be found on the visual elements of the poster such as typography, colors, layout, and images to identify hidden meanings to the audience.
Innovation of Otak-otak based on sweet potatoes
Authors: Choirunnisa Cantika , Mardiyana Eva
Published: January 2025

This study aims to evaluate the innovation of making otak-otak by replacing tapioca flour with sweet potatoes as the basic ingredient of otak-brain. Otak-otak is a traditional Indonesian food that is generally made from fish, tapioca flour, and other spices. Along with increasing awareness of healthier lifestyle patterns, these innovations are expected to offer more nutritious alternatives. Sweet potatoes with low glycemic content and high fiber are expected to increase the nutritional value of the brain and support digestive health and weight management. The research method used is an experimental method. The manufacturing process involves shredded sweet potatoes, processing ebi, processing other ingredients, and steaming. The product quality assessment was carried out by an organoleptic test involving 50 panelists to assess aspects of taste, color, texture, aroma, and appearance. The results of the organoleptic test showed that the tuber-based brains were well-received by the panelists. Taste rating 86% of panelists rated the product as good to very tasty. The color of the product was considered attractive by 78% of the panelists. The texture of the product was rated soft by 70% of the panelists, and the assessment of aroma and appearance had positive values, 86%, and 76% respectively by the panelists. The results of this study state that brain-brain innovation by using sweet potatoes as a substitute for tapioca flour has succeeded in producing healthier and still delicious products. In addition to being beneficial to health, the use of sweet potatoes can also support the local economy and strengthen food security. Therefore, it is hoped that this research can be useful for people who are interested in tuber-based brains.
Analysis of Supply Chain Risk Management in The Lubricant Industry Using the House of Risk (HOR) Method
Authors: Hidayati Muthia Putri , Vanany Iwan
Published: January 2025

PT.X is a company engaged in lubricant manufacturing. Based on the results of field studies, several risks hinder the company's supply chain process, and PT.X has never conducted a risk assessment. Therefore, risk analysis and mitigation are needed to minimize the risks that arise in the company's supply chain. This research uses the Supply Chain Operation Reference (SCOR) model to map the company's supply chain activities and the House of Risk (HOR) method to identify risks in the supply chain, including risk events, risk agents, and their correlations. The results reveal a total of 32 risk events and 26 risk agents. Then, a Pareto diagram calculation is conducted, identifying 3 priority risk agents that need to be addressed: supplier inability to provide raw materials, lack of work supervision, and inadequate workforce competence. From these 3 priority risk agents, 8 risk mitigation measures have been determined: evaluating supplier performance, establishing contracts with suppliers, planning alternative supplier selection, conducting periodic supervision, establishing company standard operating procedures, providing skills training and work discipline, recruiting workers more selectively and rigorously, and placing workers according to their expertise.
Business Education Project: Integrating Learning and Business Projects
Authors: Patrikha Finisica Dwijayati , Rakhmawati Dwi Yuli , Rafida Veni , Citra Puspita Dewi Hapsari Shinta
Published: January 2025

This research provides an illustration of a project-based learning experience that combines both understanding and business projects in a Bachelor’s Degree in Business Education program. Specifically, students enrolled in the Marketing Strategy class create a new product (goods or services) and develop an accompanying marketing strategy, including packaging design and marketing videos to be shared on social media. Afterward, students select one product from the show for use in their own semester sales project. In order to assess the effectiveness of this experience, tests were conducted before and after the project using descriptive analysis to analyze the data. Additionally, a questionnaire was distributed to obtain student responses during the classes. The findings demonstrate that Project Based Learning increases students’ abilities to work in groups and individually, and boosts their proficiency in implementing marketing strategies.
Integration of Pragmatic Aspects in Buying and Selling Transactions During The Implementation of The Sunday Festival in Lhokseumawe City
Authors: Rahayu Ririn , Iqbal Muhammad , Azhari Azhari , Ahyar Juni , Jannah Miftahul , Bancin Nurhasanah
Published: January 2025

This research aims to explain locutionary, illocutionary and perlocutionary speech acts in buying and selling transactions during the Ahad Festival in Lhokseumawe City. This study focuses on the identification and classification of locutionary, illocutionary and perlocutionary speech acts used by traders and buyers in the buying and selling interaction process. This research uses qualitative research, with data collection techniques in the form of recording techniques, listening techniques and note-taking techniques. The data in this research are in the form of sellers' and buyers' statements when buying and selling transactions are taking place, while the data sources in this research are sellers and buyers at the Sunday Festival in Lhokseumawe City. The results of the research show that the data obtained by the researcher was 47 data with a classification of 11 data of locutionary speech acts, 23 data of illocutionary speech acts and 5 data of perlocutionary speech acts.
Analisis Penggunaan Beberapa Jenis Busi dan Remap Ecu Terhadap Emisi Gas Buang pada Sepeda Motor 4 Tak
Authors: Fikri Muhammad , Sugiarto Toto
Published: January 2025

The increase in the number of motor vehicles in Indonesia has a significant impact on increasing exhaust emissions that contribute to air pollution. One way to reduce these emissions is through optimizing the combustion process by using variable spark plugs and remapping the ECU (Electronic Control Unit). This study aims to analyze the effect of the use of standard, platinum, and iridium spark plugs, as well as ECU remap at 5° and 10° ignition angles on the exhaust emissions of Vario 125 cc motorcycles. The research method used is an experiment with a pre-test and post-test research design. The test was carried out on three spark plug variations (standard, platinum and iridium) with ignition at angles of 5° and 10°. The testing process involves measuring exhaust emissions, specifically carbon monoxide (CO) and hydrocarbons (HC), at four engine rev levels (rpm) of 1500, 2000, 2500, and 3000. The data was obtained using a gas analyzer and analyzed using mean statistics and percentage of change. The results showed that the use of platinum and iridium spark plugs significantly reduced CO and HC emissions compared to standard spark plugs. At 10° ignition with an iridium spark plug, the largest difference in CO was recorded at 2500 rpm with 23.12%, while the highest HC difference was at 2000 rpm with 37.67%. Platinum spark plugs also provide quite good results with consistent reductions in CO and HC emissions. Remap ECUs with an ignition angle of 10° have proven to be more effective in reducing exhaust emissions compared to 5° ignition.
Pengaruh Word Of Mouth dan Experiential Marketing Terhadap Keputusan Mahasiswa Memilih Berkuliah Di Universitas Merdeka Malang
Authors: Zata Aman Yosanda , Widiawati Diah , Cendana Wangi Sekar
Published: January 2025

Education plays a crucial role in individual development, enabling people to learn and apply various knowledge in life. Universitas Merdeka Malang is one of the leading higher education institutions in Indonesia. This research focuses on the campus's indirect marketing strategies to introduce itself to the broader community. Word of mouth communication and experiential marketing can be effective information sources in influencing prospective students. The research aims to analyze the impact of these two factors on the decision to choose Universitas Merdeka Malang as a study destination. The study uses primary data collected from 97 respondents, students of the Faculty of Economics and Business from the 2022-2023 academic year. Samples were selected using random sampling method, and data were analyzed using multiple regression analysis. Research findings indicate that word of mouth and experiential marketing significantly influence the college selection decision.
Determinan Pengungkapan Modal Intelektual Berdasarkan Variable Non Keuangan pada Perusahaan Manufaktur di Indonesia
Authors: Tri Hardiyanti Nidia
Published: January 2025

The purpose of the research are to analyze the influence of family ownership, foreign ownership,audit committees, and independent commissioners of intellectual capital disclosure. The population in this research are the manufacturing companies listed in Indonesia Stock Exchange for 2015-2017. The sampling technique is a purposive sampling method which result from 63 samples. Data are collected using secondary data from manufacturing companies listed in Indonesia stock Exchange. Data analysis was performed using descriptive statistic analysis and multiple linear regression analysis. The result of this study shows that the following variable family ownership,  foreign ownership does not significant affect toward intellectual capital disclosure, while variable audit committess and independent commissioners significantly effect toward intellectual capital disclosure.
Understanding Physics: The Influence of Cognitive Styles and Student Interest
Authors: Samsun Samsun , Tjalla Awaluddin , Sarifah Iva
Published: January 2025

This research investigates the influence of cognitive styles and learning interest on students' understanding of physics concepts. Using a survey method with a sample of 88 first-year students from four programs at a Health Polytechnic in South Jakarta, data were collected through questionnaires on cognitive style perception, learning interest, and a physics concept understanding test. Findings from multiple regression analysis reveal: (1) Cognitive styles and learning interest collectively have a significant influence on physics concept understanding (p = 0.000, F = 26.084); (2) Cognitive style perception independently affects concept understanding (p = 0.047, t = 2.013); and (3) Learning interest significantly impacts concept understanding (p = 0.001, t = 3.426). The study highlights the interplay between cognitive preferences and motivation in achieving mastery of physics concepts.
biorecap: an R package for summarizing bioRxiv preprints with a local LLM
Authors: Turner Stephen
Published: January 2025

TL;DR

I wrote an R package that summarizes recent bioRxiv preprints using a locally running LLM via Ollama+ollamar, and produces a summary HTML report from a parameterized RMarkdown template.
PLANES: Plausibility Analysis of Epidemiological Signals
Authors: Turner Stephen
Published: January 2025

VP (Pete) Nagraj

is a long time friend, colleague, and collaborator, and is the author of this post. Pete and I have co-authored over a dozen publications, and have taught several graduate courses in data science together. Pete leads the health security analytics / infectious disease modeling and forecasting group at Signature Science, where we started this work together last year.
. Serum Neuroprotection , nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and superoxide dismutase (SOD) Levels in Neonates with Hypoxic-ischemic Encephalopathy
Authors: Wang Xuan
Published: January 2025

Abstract: Neonatal hypoxic-ischemic encephalopathy (HIE) is one of the main causes of brain injury and death in infants. This article aimed to investigate the effects of mild hypothermia therapy on neuroprotection and cytokine levels in neonates with HIE. 132 children with HIE in the Northwest Women's and Children's Hospital between January 2022 and April 2023 were enrolled as the study subjects, and they were grouped by the method of random number table, controls using conventional treatment intervention, mild hypothermia group adopting mild hypothermia therapy based on conventional treatment. The levels of cytokines and neonatal behavioral neurological assessment (NBNA) were compared before and following remedy. As against controls, in mild hypothermia therapy-treated subjects, the levels of nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and superoxide dismutase (SOD) were clearly raised; the levels of malondialdehyde (MDA), interleukin (IL-18), and Caspase-3 were clearly decreased, and the NBNA score of mild hypothermia therapy-treated subjects was clearly raised; the recovery time of neurological function was clearly shortened (all P <0.05). Mild hypothermia therapy has an obvious neuroprotective outcome on neonates with HIE, possibly by regulating the levels of cytokines.
. The Diagnostic Value plasma procalcitonin (PCT) and serum amyloid A protein (SAA) in Children with Mycoplasma Pneumonia
Authors: Zheng Yao
Published: January 2025

Objective: To evaluate the diagnostic value of pulmonary ultrasound combined with plasma procalcitonin (PCT) and serum amyloid A protein (SAA) in children with Mycoplasma pneumoniae pneumonia (MPP). Method: Clinical data of 80 children with community-acquired pneumonia admitted to our hospital from January 2023 to December 2023 who underwent lung ultrasound examination were collected. Children with MPP were divided into MPP group and non MPP group on the ground of whether they were MPP patients. PCT and SAA levels were checked meanwhile, and lung ultrasound and PCT and SAA examination results were collected and compared. The ROC curve was used to evaluate the value difference of the three alone and in combination in the diagnosis of mycoplasma pneumonia. Result: Compared with non MPP, MPP children showed significant differences in multiple aspects of lung ultrasound imaging, PCT, and SAA levels. Logistic regression analysis further indicated that individuals with increased/fused B-lines, elevated PCT, and elevated SAA had a lower risk of MPP, while a small amount of pleural effusion was a risk factor for MPP. The logistic regression model established on the ground of the above four variables had good predictive value for MPP. Conclusion: Abnormal imaging features of lung ultrasound, such as increased/fused B-lines, small amounts of pleural effusion, and PCT and SAA levels, are associated with the occurrence of MPP in children. A small amount of pleural effusion indicates a higher risk of disease as MPP. Detecting PCT, SAA levels, and lung ultrasound can promote the improvement of accuracy in distinguishing early MPP from non MPP.
Background seismicity and seismic correlations
Authors: Apostol Bogdan Felix
Published: January 2025

The law of energy accumulation in the earthquake focus is presented, together with the temporal, energy and magnitude distributions of regular, background earthquakes. The background seismicity is characterized by two parameters—the seismicity rate and the Gutenberg-Richter parameter, which can be extracted by fitting the empirical earthquake distributions. Time-magnitude and temporal correlations are presented, and the information they can provide is discussed. For foreshocks the time-magnitude correlations can be used to forecast (with limitations) the mainshock. The temporal correlations indicate a decrease of the Gutenberg-Richter parameter for small magnitudes, in agreement with empirical observations for foreshocks. On the other hand, the aftershocks may be viewed as independent earthquakes with changed seismic conditions, so they may exhibit an increase of this parameter, also in accordance with empirical observations. The roll-off effect for small magnitudes and the modified Gutenberg-Richter distribution are discussed for temporal corralations, and the derivation of the Bath’s law is briefly reviewed.
Analysis and modelling of the transmission dynamics of tuberculosis in the presence of latent and active populations
Authors: Ibrahim Aliyu , Janda Mahdi Audu , Kahianyu Stella Nyambura , Gueye Ass , Nkandu Peter Chola , Ayerkain Eugene Tettey
Published: January 2025

Tuberculosis, a chronic infectious disease caused by Mycobacterium tuberculosis, remains a significant global health challenge, particularly in developing countries. This project investigates the dynamic transmission of tuberculosis, focusing on the interplay between latent and active populations. We develop and analyze an (Susceptible, Latent, Infectious, Recovered) compartmental mathematical model to examine key parameters affecting TB transmission dynamics. Our study employs stability and sensitivity analyses to provide critical insights into the basic reproduction number and equilibrium points of the TB transmission model. Through numerical simulations, we explore how various intervention strategies impact the spread of tuberculosis. The model yields an approximate reproduction number of 0.3, suggesting that under the current conditions represented in the model, TB would naturally decline in the population. Key findings emphasize the importance of maintaining a low transmission rate and improving the recovery rate to expedite the elimination of tuberculosis. The model demonstrates the complex interplay between susceptible, infected, latent, and recovered populations over time, highlighting the persistent nature of TB due to factors such as latent activation and loss of immunity in recovered individuals. This project provides a robust foundation for public health strategies aimed at controlling and ultimately eliminating tuberculosis. Our results underscore the need for targeted interventions focusing on reducing transmission, managing latent infections, and enhancing treatment efficacy. These insights can inform policy decisions and resource allocation in TB control programs, contributing to the global effort to combat this persistent disease.
From computer algebra to gravitational waves
Authors: Pommaret J.-F.
Published: January 2025

The first finite length differential sequence has been introduced by Janet (1920). Thanks to the first book of Pommaret (1978), the Janet algorithm has been extended by Blinkov, Gerdt, Quadrat, Robertz, Seiler and others who introduced Janet and Pommaret bases in computer algebra. Also, new intrinsic tools have been developed by Spencer in the study of Lie pseudogroups or by Kashiwara in differential homological algebra. The achievement has been to define differential extension modules through the systematic use of differential double duality. Roughly, if D = K[d] is the non-commutative ring of differential operators with coefficients in a differential field K, let D be a linear differential operator with coefficients in K. A direct problem is to find the generating compatibility conditions (CC) in the form of a differential operator D1 such that Dξ = η implies D1η = 0 and so on. Taking the adjoint operators, we have ad(D) ◦ ad(D1) = ad(D1 ◦ D) = 0 but ad(D) may not generate all the CC of ad(D1). If M is the D-module defined by D and N is the D-module defined by ad(D) with torsion submodule t(N), then t(N) = ext 1 (M) “measures” this gap that only depends on M and not on the way to define it. Also, R = homK(M, K) is a differential module for the Spencer operator d : R → T ∗ ⊗ R, first introduced by Macaulay with his  inverse systems (1916). When D : T → S2T ∗ : ξ → L(ξ)ω = Ω is the Killing operator for the Minkowski metric ω with perturbation Ω, then N is the differential module defined by the Cauchy = ad(Killing) operator and t(N) = ext 1 (M) = 0 because the Spencer sequence is isomorphic to the tensor product of the Poincaré sequence by a Lie algebra. The Cauchy operator can be thus parametrized by stress functions having nothing to do with Ω, like the Airy function for plane elasticity. This result is thus pointing out the terrible confusion done by Einstein (1915) while ”adapting” to space-time the work done by Beltrami (1892) for space only. both of them using the same Einstein operator but ignoring it was self-adjoint in the framework of differential double duality (1995). Though unpleasant it is, we shall prove that the mathematical foundations of General Relativity are not coherent with these new results which are also illustrated by many other explicit examples.