bluuebunny/crossref_metadata_2025 huggingface dataset:
Workload Analysis to Establish the Ideal Staffing Level Using the Workload Analysis (WLA) Method (Case study of Manufacturing Design Engineering Production Laboratory, in Indonesia)
Authors: Ariyani Emma Dwi , Muhammad Achmad , Sya’diah Nabila Hikmatus , Sadikin Supriyadi , Latipah Yeni
Published: November 2024

As a pivotal unit in manufacturing process, the Manufacturing Design Engineering Laboratory plays a critical role in the beginning of manufacturing, dealing with the process of designing and developing new products. Hence, assessing the workload perceived by the employees of Manufacturing Design Engineering Laboratory is significant to ensure the optimal number of workers as a way to maintain the productivity and efficiency of manufacturing process. In this study, there are five areas of expertise (KBK) of Manufacturing Design Engineering Laboratory which were evaluated namely Press Tool, Moulding, Jig & Fixture, Metrology, and General Mechanic. By applying workload analysis method, the five expertise were measured based on their workload and other correlated aspects called performance rating and allowance. The Findings show that the average workload for employees in the Press Tool Expertise Area is 91.42%, with an optimal number of 4 employees. Meanwhile, in the Moulding Expertise Area, the average employee workload is 68.2%, with an optimal number of 2 employees. In the Jig & Fixture Expertise Area, the average employee workload is 62.65%, with an optimal number of 2 employees. In the Metrology Expertise Area, the average employee workload is 87.96%, with an optimal number of 3 employees. Lastly, in the General Mechanic Expertise Area, the average employee workload is 90.24%, with an optimal number of 7 employees. Five more workers are needed, bringing the total from 13 to 18, in light of the task difficulties that have been discovered. Even after the number of employees has been established, changes like a fair workload division need to be made.
Modeling Queuing System in Healthcare Centers. A Case Study of The Dental Department of The Kwame Nkrumah University of Science and Technology
Authors: Sefah Bernard , Affum Collins
Published: November 2024

This paper analyses the use of the queuing model in healthcare, emphasizing the Outpatient and Dental Department (ODD) of a city hospital in Kumasi, Ghana. Mathematical and machine learning approaches are used to analyze patient flow, waiting, and service times. It is widely recognized that, due to high demand and limited resources in these hospitals, a hospital should promptly treat its patients, especially those in need of critical dental care. Still, surprisingly, this is not achieved in practice, particularly in government-owned health institutions, because of high demand and limited resources in these hospitals. To enhance the level of admittance to care in ODD, the hospitals should obtain a central tray setup system for instruments required for the different dental procedures done in the dental department to reduce the time spent sorting them up, thereby reducing the amount of time spent in queue and also increasing the number of dentists from one to three.
BMWK-Projekt SiPro/The SiPro project – Establishment of a continuous simulation process chain in heavy industry
Authors: Kittner Kai ,   Konsortium SiPro-Projekt
Published: November 2024

Das Projekt „SiPro“, Etablierung einer durchgängigen Simulationsprozesskette in der Schwerindustrie, ist ein vom Bundesministerium für Wirtschaft und Klimaschutz (BMWK) im Rahmen des 7. Energieforschungsprogramms gefördertes Projekt. Das Ziel ist es, eine montane Prozesskette zu analysieren und daraus Optimierungen abzuleiten. Solch eine Prozesskette ist exemplarisch: Blockguss-Freiformen-Wärmebehandlung. Wesentliche Basis ist die Aufnahme von Kennwerten, Materialkennwerten (beispielsweise Fließkurven) und andererseits Prozesskennwerten (zum Beispiel Aufheizkurven). In letzter Konsequenz steht die Reduzierung der eingesetzten Energie, und damit des CO2 im Fokus.
Variable Dämpfung für die Schmiedepressengründung/Variable damping in the foundation of energy-linked forming machines - Damping system with adjustable magnetorheological properties for the foundation of energy-linked forming machines
Authors: Friesen Dietmar , Fries Stefan , Schmiele Dennis , Krimm Richard , Behrens Bernd-Arno
Published: November 2024

Umformprozesse auf Schmiedepressen gehen oft mit erheblichen Erschütterungen einher, welche auch negative Auswirkungen auf die Personalgesundheit und die Maschinenverfügbarkeit haben können. Bei Auslegung der Maschinengründungen herrscht derzeit ein Zielkonflikt hinsichtlich des optimalen Dämpfungsgrades. Im Beitrag wird ein Dämpfungssystem auf Basis magnetorheologischer Flüssigkeit vorgestellt, das eine variable Dämpfung der infolge stoßartiger Prozessanregung resultierenden Schwingungen ermöglicht.
Charakterisierung der Zunderschädigung/Characterizing oxide scale damage behaviour – Oxide scale layers on iron-based steels with varying steel contents
Authors: Behrens Bernd-Arno , Lampke Thomas , Uhe Johanna , Bergelt Tim , Wester Hendrik , Mohnfeld Norman , Peddinghaus Simon ,   Graf. Marcel
Published: November 2024

Bei der Warmmassivumformung von Stählen tritt durch die Bildung von Zunder ein Massenverlust sowie ein erhöhter Werkzeugverschleiß auf. Um den Einfluss des Legierungselementes Chrom auf die Bildung der Zunderschicht zu analysieren, wird ein herkömmlicher C45-Stahl mit einer Laborschmelze eines 45Cr4 verglichen. Der Aufbau der Zunderschichten wird mittels Nanoindentation und das Schädigungsverhalten durch Zugversuche untersucht.
UNPACKING SOCIAL INTERACTIONS IN PACKAGE TOURS: A FOCUS ON TOURIST-TO-TOURIST AND TOURIST-TO-TOUR GUIDE INTERACTIONS AND INFLUENCING FACTORS
Authors: Pham Tran Truc Vien
Published: November 2024

This study aims to comprehensively understand social interactions on package tours. Using a qualitative approach, combining interviews (n = 33) and field observations (n = 3) administered to Vietnamese package tourists, the study identified ten common forms of social interaction among tourists and eight common forms between tourists and tour guides. The majority of tourist-to-tourist interactions were found to be social-oriented, while most tourist-to-tour guide interactions were service-oriented. The study also found that factors influencing these interactions included tour guide performance, tourist personality, tourist needs, and situational factors on tours. The findings make a significant contribution to the literature on social interactions and offer valuable practical implications for tour marketing and management practitioners, particularly in their efforts to manage social interactions on tours and recovery package tours in the post-Covid era.
Study of electric power parameters of the Kola Wind Farm
Authors:   Northern Energetics Research Centre of the Kola Science Centre of the Russian Academy of Sciences, Yaroshevich Vera V. , Karpov Aleksei S. ,   Northern Energetics Research Centre of the Kola Science Centre of the Russian Academy of Sciences, Gubskaya Elizaveta I. ,   Northern Energetics Research Centre of the Kola Science Centre of the Russian Academy of Sciences
Published: November 2024

The research object is the electrical network of the Kola Wind Farm that is the largest one operating above the Arctic Circle. The article describes this new facility and shows the results of power quality indices point recordings carried out at the substation which has galvanic connection with the Kola grid. A simplified analytical review of locations that are the most vulnerable for the considered section of the power system in terms of electromagnetic compatibility is also performed.
Prevalence of Diabetes and Knowledge of Risk Factors Among Patients’ Relatives in Ekiti State University Teaching Hospital, (EKSUTH), Ado-Ekiti, Ekiti State, Nigeria
Authors: Oluwayemi Margaret Adefiola
Published: November 2024

This study investigated prevalence of diabetes and knowledge of risk factors among relatives of diabetic patients in Ekiti State University Teaching Hospital (EKSUTH), Ado-Ekiti, Nigeria. After receiving Ethical approval and informed consent, structured questionnaire was administered to relatives of diabetic patients in male medical ward of the hospital. Measurement of fasting blood glucose (FBG) was also done following standard procedures. Descriptive and inferential statistics were used for data analysis. 13 (10.8%) had FBG at diabetes level. 7.8-12.1mg/dl. On knowledge of diabetes risk factors, 77 (64.1%) knew that family history is a risk factor, 84(70%) identified overweight, 80 (66.6%) knew of sedentary lifestyles, 100 (83.3%) identified high blood pressure and 86 (71.6%) knew unhealthy eating as a risk factor for diabetes. In conclusion, knowledge of diabetes risk factors was high and prevalence of diabetes was higher among male than female. The study recommends advocacy targeted at relatives of patients to encourage lifestyle modifications may help reduce prevalence of diabetes
MECHANICAL STRENGTH CHARACTERIZATION OF THREE LESSER-UTILISED TIMBER SPECIES IN GHANA
Authors: SEIDU HARUNA , NÉMETH RÓBERT , OWUSU FRANCIS WILSON
Published: November 2024

This study investigates the mechanical properties of three lesser-utilized timber species in Ghana: Blighia sapida, Gilbertiodendronlimba, and Lanneawelwitschii. Despite their potential, these species are underexplored compared to widely used commercial timbers. Six trees, two from each species, were tested for properties such as modulus of elasticity (MOE), modulus of rupture (MOR), compressive strength, shear strength, hardness, and density. Results indicate that Blighia sapida has superior mechanical properties, placing it in the D50 strength class, suitable for high-resistance structural applications. Gilbertiodendronlimba and Lanneawelwitschii are categorized under the D40 strength class, appropriate for moderate load-bearing uses. This research demonstrates that lesser-utilized species can serve as viable alternatives to traditional timbers, potentially reducing pressure on overexploited species. By promoting their use, the study supports sustainable forestry practices and contributes to a more diversified and resilient timber industry in Ghana.
Integración de las TIC en la Preservación y Enseñanza de Saberes Ancestrales: Impacto en la Identidad Cultural y Educación Indígena
Authors: Rubiano Caballero Martha Lucia , Hernandez Mejía Carlos Alberto
Published: November 2024

Este artículo analiza la integración de las Tecnologías de la Información y la Comunicación (TIC) en la preservación y enseñanza de saberes ancestrales en comunidades indígenas. Se exploró cómo las herramientas digitales contribuyen a conservar los conocimientos tradicionales y fortalecer la identidad cultural de los estudiantes. La metodología cualitativa utilizada incluyó una revisión documental de estudios y fuentes relevantes, tales como artículos científicos y tesis, sobre el uso de TIC en contextos educativos y su relación con la transmisión de saberes ancestrales. Los resultados muestran que las TIC, cuando se integran correctamente, facilitan la enseñanza de saberes ancestrales mediante herramientas interactivas que promueven la conservación cultural. Además, amplían el alcance del conocimiento tradicional más allá de las fronteras geográficas. Sin embargo, se identifican obstáculos como la falta de infraestructura tecnológica y la capacitación insuficiente de docentes, lo que puede limitar su efectividad. En conclusión, aunque las TIC ofrecen oportunidades valiosas para la educación indígena, su éxito depende de un enfoque contextualizado que respete y fortalezca las tradiciones culturales. Se recomienda investigar su impacto a largo plazo en la transmisión intergeneracional del conocimiento.
Cuidados Perdidos de Enfermería en Diferentes Servicios Hospitalarios: Estudio Multiservicio
Authors: Urueña Tovar Jhon Jarol , Tavera Trujillo Johanna Alejandra , Gámez Vargas Jose Julián , Uyuco Cadena Diego Darley
Published: November 2024

La atención al paciente en instituciones de salud exige procesos estructurados y recursos adecuados para evitar problemas como la omisión de cuidados, problemática poco explorada en Colombia y que afecta la calidad del servicio, además de implicar desafíos económicos, éticos y legales. Este estudio, realizado en Florencia, Caquetá, tuvo como objetivo analizar los cuidados perdidos de enfermería en los servicios de hospitalización, obstetricia y urgencias de un hospital de segundo nivel. Mediante un enfoque cuantitativo descriptivo y utilizando el cuestionario OMICE, se recopilaron datos de los profesionales de enfermería para evaluar las prácticas omitidas. Los resultados evidenciaron diferencias significativas: hospitalización mostró altos niveles de cumplimiento en cuidados básicos, pero omisiones en administración de medicamentos; obstetricia tuvo el menor índice de omisiones, destacándose en el cuidado de signos vitales y vías venosas; y urgencias registró la mayor frecuencia de cuidados perdidos, particularmente en el suministro de medicación a demanda y el apoyo emocional a familiares, reflejando las exigencias de este entorno de alta demanda.
Nivel de Conocimiento acerca de los Métodos de Planificación Familiar en Adultos de 20 a 29 Años adscritos a una Unidad de Medicina Familiar
Authors: Serrano Espinoza Blanca Mónica , Hernández Jasso María Del Carmen
Published: November 2024

Nivel de conocimiento acerca de los métodos de planificación familiar en adultos de 20 a 29 años adscritos a una Unidad de Medicina Familiar. Antecedentes. La sexualidad y la reproducción constituyen dimensiones básicas del desarrollo de cada persona, y por lo tanto de la salud individual; por lo anterior es de suma importancia el conocimiento sobre los diferentes métodos de planificación familiar. Objetivo General. Determinar el nivel de conocimiento acerca de los métodos de planificación familiar en adultos de 20 a 29 años adscritos a la UMF No.53 de la ciudad de León, Guanajuato, en el periodo de enero-junio del 2023. Material Y Métodos. Se realizó un estudio observacional, prospectivo, descriptivo, transversal con enfoque cuantitativo en el cual se incluyeron a  446 adultos de 20 a 29 años, se  estimó el tamaño de la muestra para una  proporción, con un nivel de confianza de 95%, con una precisión de 5% y una proporción esperada de 47.15% de acuerdo con el estudio de Fabriccio J, en Perú. El muestreo se realizó por simple disponibilidad, como instrumento de medición el cuestionario de Nivel de conocimiento sobre métodos anticonceptivos elaborado por Cabanillas, M. y Tomas, con Alfa de Cronbach de 0.750. Se realizó el análisis estadístico usando el programa SPSS. Resultados.  De los 446 participantes con edad media de 24.43 años, mayormente mujeres (62.1%) y con educación hasta preparatoria (46.0%). Solo el 39.7% mostró un nivel de conocimiento adecuado sobre métodos anticonceptivos. La puntuación media total fue de 25.63±5.04 puntos.  Conclusión. Dado que menos del 40% de los pacientes tuvieron un nivel de conocimiento adecuado sobre métodos de planificación familiar, es necesario implementar programas educativos sobre métodos anticonceptivos.
Cognitive impairments in schizophrenia: assessment, symptom correlations, and implications for clinical management
Authors:   “Prof. Dr. Alexandru Obregia” Clinical Psychiatry Hospital, Bucharest, Romania, Horosan Lavinia , Corban Mihai ,   “Prof. Dr. Alexandru Obregia” Clinical Psychiatry Hospital, Bucharest, Romania, Ion Adriana ,   “Prof. Dr. Alexandru Obregia” Clinical Psychiatry Hospital, Bucharest, Romania, Nistor Diana-Elena ,   “Prof. Dr. Alexandru Obregia” Clinical Psychiatry Hospital, Bucharest, Romania, Giurgiuca Ana ,   “Prof. Dr. Alexandru Obregia” Clinical Psychiatry Hospital, Bucharest, Romania,   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
Published: November 2024

Schizophrenia is a chronic, severe mental illness that affects cognitive functioning alongside its well-known positive and negative symptoms. Cognitive impairments, including deficits in memory, attention, executive function, and social cognition, significantly impact patients’ quality of life and independence, yet remain inadequately addressed in clinical practice. This study aims to explore the cognitive impairments in schizophrenia and their relationship with symptom severity in a cohort of 28 male inpatients diagnosed with the disorder. Cognitive function was assessed using the Addenbrooke’s Cognitive Examination III, Brief Cognitive Assessment Tool, and the Positive and Negative Syndrome Scale. The study also examined the correlation between cognitive deficits and educational level, as well as between cognitive impairment and symptom dimensions. Results showed no statistically significant correlation between cognitive deficits and educational attainment or symptom severity. This suggests that cognitive impairment in schizophrenia is multifactorial, and the current tools for assessment may not fully capture the complexity of these deficits. Despite these limitations, the study highlights the urgent need for a more integrated approach to the assessment and treatment of cognitive impairments in schizophrenia. It calls for the development of standardized cognitive assessment tools and more diverse, larger studies to deepen the understanding of how cognitive deficits influence clinical outcomes and inform therapeutic strategies.
Neurosyphilis: a complex presentation and diagnostic challenge in a psychiatric setting
Authors:   “Prof. Dr. Alexandru Obregia” Clinical Psychiatry Hospital, Bucharest, Romania, Ion Adriana , Nistor Diana-Elena ,   “Prof. Dr. Alexandru Obregia” Clinical Psychiatry Hospital, Bucharest, Romania, Horosan Lavinia ,   “Prof. Dr. Alexandru Obregia” Clinical Psychiatry Hospital, Bucharest, Romania, Saftencu Mihai ,   “Prof. Dr. Alexandru Obregia” Clinical Psychiatry Hospital, Bucharest, Romania, Giurgiuca Ana ,   “Prof. Dr. Alexandru Obregia” Clinical Psychiatry Hospital, Bucharest, Romania,   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
Published: November 2024

Neurosyphilis presents a significant diagnostic challenge in psychiatric settings due to its highly variable neuropsychiatric manifestations, which can mimic a range of other psychiatric disorders. This case report describes a 36-year-old male admitted with acute psychotic symptoms, including hallucinations, delusions, and disorganized behavior. His clinical history revealed previously treated syphilis, with no subsequent follow-up, and recent progressive cognitive and behavioral changes, ultimately leading to a diagnosis of neurosyphilis (specifically general paresis) following serological confirmation. This case highlights the complexities in diagnosing neurosyphilis, as its symptoms often overlap with common psychiatric conditions, making it easy to overlook in routine assessments. Importantly, the diagnosis required a high index of suspicion due to the patient’s psychiatric presentation combined with a background of untreated syphilis. Considering neurosyphilis in the differential diagnosis can be challenging, especially when psychiatric symptoms like depression, cognitive decline, and psychosis appear in the absence of clear neurological signs and when there is no follow-up on prior infections. The resurgence of syphilis and its neurological complications remains a concern, particularly in psychiatric populations where risk factors such as substance use disorders, socioeconomic challenges, and limited access to healthcare are prevalent. This case underscores the critical role of psychiatrists in screening for syphilis, especially in patients at risk or in areas with high syphilis prevalence. Early and accurate diagnosis, coupled with appropriate treatment using penicillin, can halt disease progression and mitigate severe neuropsychiatric outcomes. This case underscores the importance of maintaining a broad differential diagnosis in psychiatric patients and considering neurosyphilis in cases of unexplained psychiatric symptoms.
INFLUENCE OF BIOFERMENTED FEEDS ON THE REPRODUCTIVE FUNCTION OF REPLACEMENT PIGS
Authors:   RUDN University, MIRONOVA O.A. ,   All-Russian Plant Quarantine Center, AMERKHANOV Kh.A. ,   Russian State Agrarian University – Moscow Agricultural Academy named after K.A. Timiryazev, MIRONOVA L.P. ,   Don State Agrarian University
Published: November 2024

The article presents data on the effect of feeding different amounts of fermented compound feed from low-value plant waste of the agro-industrial complex on the anatomical, physiological and production indicators of reproduction of replacement pigs. The research data prove that higher reproduction rates were obtained when feeding replacement gilts from the age of six months until insemination with feed consisting of 60% BD (recipe SK-7) and 40% feed from low-value plant waste of the agro-industrial complex (40% brewer's grains, 20% wheat bran, 20% sunflower cake, 20% mushroom substrate), fermented by the method of microbiological fermentation using Lesnov's sourdough.
Analisis Ketentuan Hukum dan Penerapan Sistem First to File dalam Kasus Pembatalan Merek Terdaftar
Authors: Mardianto Sebastian Edward , Rahaditya R.
Published: November 2024

The development of the times has led to significant growth in goods and services, resulting in the emergence of new works within these fields. However, in certain conditions, this has given rise to issues concerning brand usage, where individuals or business actors intentionally use the trademarks of other registered companies, particularly those that are well-known and large-scale, to gain specific business advantages in unethical ways that conflict with the law. This is exemplified by the case of an Indonesian citizen named Melinda Oktavia, who used the trademark Electro-Voice—a prominent brand from the United States—without obtaining permission from the original company. The analysis of Legal Provisions and the Application of the First-to-File System in Registered Trademark Cancellation Cases aims to examine the legal provisions and the implementation of the first-to-file system in handling foreign trademark cancellation cases, specifically focusing on the Electro-Voice case. This study employs a normative approach. The research findings reveal that the legal protection provided by the Trademark Law in Indonesia is highly relevant but still causes confusion when linked to foreign famous trademarks, particularly given that infringement of foreign trademark rights intersects with international law and can harm the owner financially and in terms of reputation. In the outcome of the Electro-Voice case, the measures taken by the court signal a positive indication that Indonesian law is capable of protecting well-known trademarks.
Penerapan Metode Design Thinking Pada User Interface Dan User Experince Aplikasi Monitoring Skripsi Berbasis Website
Authors: Sodik Anwar , Putri Rahmi Rizkiana , Firdaus Ikhwan , Husada Safril Adi
Published: November 2024

Penelitian ini memiliki fokus dalam menerapkan metode Design Thinking pada User Interface (UI) dan User Experience (UX) aplikasi monitoring skripsi berbasis website. Metode Design Thinking digunakan untuk mengidentifikasi, memahami, dan menyelesaikan masalah yang berkaitan dengan pengalaman pengguna dalam menggunakan aplikasi tersebut. Penelitian ini menggunakan pendekatan kualitatif dengan teknik pengumpulan data berupa observasi, wawancara, dan studi dokumentasi. Dari hasil pengujian menggunakan model User Experience Questionnaire (UEQ) terhadap 24 mahasiswa sebagai pengguna, penelitian ini menunjukkan bahwa penerapan metode Design Thinking berhasil meningkatkan kualitas UI dan UX aplikasi. Skor kualitas pragmatis (kejelasan, efisiensi, ketepatan) mencapai 1,97 (skala -3 sampai 3) dan kualitas hedonis (stimulasi, kebaruan) 1,95 (skala -3 sampai 3) keduanya termasuk dalam kategori Excellent. Sementara itu, daya tarik aplikasi memperoleh skor 1,71 (skala -3 sampai 3) termasuk ke dalam kategori Good. Hasil ini menunjukkan bahwa antarmuka yang dirancang mampu memberikan pengalaman pengguna yang memuaskan, baik dari segi fungsionalitas maupun estetika serta mampu meningkatkan produktivitas dalam menghasilkan karya skripsi.
AI Applications and Emerging Trends in Petroleum Exploration and Development
Authors: Kumar Mishra Praveen , Kumar Manish
Published: November 2024

This paper examines how AI is transforming petroleum exploration and development, addressing current applications and future directions. Machine learning is being used to enhance tasks like identifying rock types, reconstructing logging curves, and estimating reservoir parameters, showing promise in improving data processing and interpretation. In seismic analysis, computer vision helps with identifying initial seismic signals and detecting faults. Deep learning and optimization techniques are applied in reservoir engineering, enabling real-time waterflooding optimization and production forecasting for oil and gas. Data mining is also enhancing drilling, completion, and facility operations, leading to smarter equipment and integrated software. Looking ahead, AI in petroleum is poised to advance with intelligent production tools, automated data processing, and specialized software platforms. Future innovations are expected in digital basin modeling, fast imaging logging tools, advanced seismic systems, smart drilling and fracturing technologies, and real-time monitoring of injection and production zones.
Analysis of Mechanical and Microstructure Properties for FCAW Welded IS 2062 Steel Bead
Authors: Kumar Vikash , Kumar Yadav Subodh
Published: November 2024

Production rate and excellent metal deposition rate makes Flux cored arc welding (FCAW) unique among all welding process. The application of FCAW in field of structure joining of high strength allow steel is large. The base metal consists of two 150 × 150 × 16 mm thick steel plates of grade IS2062 E 350 are chosen for the study. The weld metals made by repeated pass FCAW process were submitted to tensile, bending and charpy-V examination. The metallographic examination for samples removed transversally to the weld bead. For the experiment, optimum parameters were chosen. From this study, the result showed that the mechanical and microstructural propertied of weld bead are superior than the base metal.
Osler-Weber-Rendu Disease: A Rare Contributor to Recurrent Iron Deficiency Anemia
Authors: Suchitra Reddy Kalva , Siddhanth Kumar Mekala , Topalkatti Usha , Kadam Param
Published: November 2024

Hereditary hemorrhagic telangiectasia (HHT), also called Osler-Weber-Rendu syndrome, is a rare genetic disorder inherited in an autosomal dominant pattern. It is marked by recurrent nosebleeds, arteriovenous malformations (AVMs), mucocutaneous telangiectasias, and often a family history of the condition. This case involves a 55-year-old woman with a prolonged history of spontaneous bleeding, particularly from lesions on her tongue, leading to chronic iron deficiency anemia. The case emphasizes the importance of considering HHT in patients with anemia and unexplained recurrent bleeding. It also underscores the value of targeted therapies and genetic counseling in managing the disorder.
Leveraging Artificial Intelligence (AI) by a Strategic Defense against Deepfakes and Digital Misinformation
Authors: Gilbert Chris , Gilbert Mercy Abiola
Published: November 2024

With rapid technological advancements, the emergence of deepfakes and digital misinformation has become both a powerful tool and a formidable challenge. Deepfakes—realistic yet fabricated media generated through artificial intelligence—threaten media credibility, public perception, and democratic integrity. This study explores the intersection of AI technology with these concerns, highlighting AI's role both as a driver of innovation and as a defense mechanism. By conducting an in-depth review of literature, analyzing current technologies, and examining case studies, this research evaluates AI-based strategies for identifying and addressing misinformation. Additionally, it considers the ethical and policy implications, calling for greater transparency, accountability, and media literacy. Through examining present AI techniques and predicting future trends, this paper underscores the importance of collaborative efforts among tech companies, government agencies, and the public to uphold truth and integrity in the digital age.
Acumulación de nitrógeno, fósforo y potasio en los frutos de café.
Authors: Sadeghian Siavosh , Mejía-Muñoz Beatriz , González-Osorio Hernán
Published: November 2024

La cantidad de nutrientes requeridos por las plantas depende de la interacción de factores como: 1) las exigencias de la planta (especie y variedad), 2) el nivel de producción, 3) las propiedades de suelo, 4) los componentes ambientales y 5) el manejo. En concordancia a lo expuesto, la extracción continuada de nutrientes por la cosecha, acompañada de poco o nulo reemplazo a través del abonamiento, reduce la producción e incrementa la probabilidad de respuesta a la fertilización.
Informe del Gerente General 1930
Authors:   Federación Nacional de Cafeteros de Colombia
Published: November 2024

Informe del Gerente al 4 Congreso Nacional de Cafeteros. Celebrado en diciembre de 1930.
Informe del Gerente General 1945
Authors:   Federación Nacional de Cafeteros de Colombia
Published: November 2024

Informe del Gerente al 15 Congreso Nacional de Cafeteros. Celebrado en diciembre de 1945.
Informe del Gerente General 1946
Authors:   Federación Nacional de Cafeteros de Colombia
Published: November 2024

Informe del Gerente al 16 Congreso Nacional de Cafeteros. Celebrado en noviembre de 1946.
The impact of Artificial Intelligence on cyberspace security and market dynamics
Authors: Mohammed Belghachi
Published: November 2024

The integration of artificial intelligence (AI) into cybersecurity has marked a transformative shift in the field of digital security, offering advanced capabilities for threat detection, response, and prevention. This paper explores the impact of AI on cybersecurity, examining its role in enhancing security measures, the challenges associated with its deployment, and the implications for market dynamics. AI technologies, including machine learning and deep learning, have significantly improved the ability to identify and mitigate cyber threats by analyzing large volumes of data in real-time and automating incident response. Despite these advancements, the application of AI in cybersecurity presents challenges such as data quality, bias, false positives, adversarial attacks, and ethical concerns. The paper also discusses future directions for AI in cybersecurity, including advancements in explainable AI, the need for robust models, and the integration with emerging technologies. Overall, AI represents a powerful tool in the fight against cyber threats, but its deployment must be carefully managed to address its limitations and ethical implications.
Runge Kutta method for third order differential equation with generalized Cauchy boundary conditions
Authors: Boudani Abdelkader , Yahiaoui Toufik , Hamaidia Walid
Published: November 2024

The paper focuses in developing a numerical method allowing to solving a third order nonlinear differential equation (DE) with generalized Cauchy boundary conditions (BC). The problem consists in transforming the third order DE, to a system of twelve nonlinear first order differential equation (FODE) with three initials conditions (IC). The resolution of this system of FODE is made by the adaptation of the Runge Kutta method of order 4. The determination of the IC is made by the resolution of an algebraic system of three nonlinear equations, of which the resolution is made simultaneously by the Newton's algorithm. For each Newton’s method iteration, a system of nonlinear algebraic equations is obtained whose solution is made by the method of Gauss. The function y(x) and these successive derivatives are obtained point by point in the interval [a1, a2]. The initial values ​​of Newton's algorithm can be taken by the physical model since DE can model a precise physical phenomenon. The application is made by the consideration of an arbitrary example of 3rd DE by modifying only their BC. The validation is made by considering the 3th Falkner-Skan DE of the boundary layer.
Buckling of the supersonic axisymmetric HT MLN structure
Authors: Boudani Abdelkader , Yahiaoui Toufik , Hamaidia Walid
Published: November 2024

The aim of this work is to develop a numerical calculation program to determine the first critical buckling force of the axisymmetric supersonic MLN in the adaptation regime by the energetic method for the needs of the future aerospace construction. After designing the MLN by the HT MOC, the contour of the nozzle will be determined point by point meeting the requirements for eliminating thrust losses. The design essentially depends on the exit Mach number and the stagnation temperature of the combustion chamber. In this first step, the distribution of the wall pressure ratio at each internal point along the internal wall of the nozzle, as well as the thrust force are determined. Its resultant necessarily applied to the thrust center in relation to the throat of the nozzle, which must also be determined in order to assimilate the nozzle as being a beam of variable section embedded in the throat and free at the exit of the nozzle. The section of the beam is of the thin-walled circular shape having a constant thickness across the longitudinal axis and constructed of a same material. Using the energy method, one can numerically determine the value of the first critical buckling force of the nozzle corresponding to the data. The obtained integrals are calculated by the Simpson method. The cubic spine interpolation is used to interpolate the buckling deformation in eatch iteration. A new dimensionless coefficient of the critical force is introduced. We also consider a new other buckling coefficient λ as being the Logarithm of the ration between the critical buckling force under the thrust force, making it possible to directly indicate the existence or absence of buckling in the nozzle during the flow in the nozzle. Then if λ>0.0, the buckling phenomenon is absent in the flow, and it is present if λ≤0.00. Truncation of the nozzle is considered in order to see the possibility of increasing the critical buckling force. The application is made for Air. An example of the structural sizing of the nozzle to avoid the buckling phenomenon is considered in this study.
A Comparative Study on Perceived Stress between Employees Working as Information Technology Workers and Railway Ticketing Officers
Authors: Pushpa T. Gifty Jeba
Published: November 2024

Aim: To compare the perceived stress among information technology workers and railway ticketing officers. Method: Hundred employees are taken through a convenient sampling method. The information technology workers (n=50) and the railway ticketing officers (n=50). In this study the information technology workers and the railway ticketing officers those who have been working for more than one-year period of time. Results: This study results in a p-value of 0.144 so, there is no significant difference in perceived stress among information technology workers and railway ticketing officers. Conclusion: The perceived stress scale was used to find out the perceived stress between the railway ticketing officers and the information technology workers. There was no significant difference between the perceived stress among information technology workers and the railway ticketing officers.
Spatial distribution and its driving forces analysis of soil organic matter in semi-arid grassland open-pit mining areas
Authors: Wu Zhenhua , Wang Xiaoying , Dai Ziqiang , Ma Weibo , Yang Dejun , Yang Yongjun , Yu Qiao
Published: November 2024

Studying the spatial distribution of soil organic matter (SOM) and exploring its driving factors in semi-arid grassland open-pit coal mining areas is crucial for sustaining ecological development and security. Currently, research on SOM in mining areas lacks large-scale investigation, sampling, spatial distribution, and driving force research for semi-arid grassland open-pit coal mining areas, and it is unable to comprehensively grasp the distribution characteristics and driving force of SOM in open-pit coal mines. In view of this, this study took the Shengli Coal Field in Xilinhot City, the hinterland of Xilingol Grassland, as an example to research the spatial distribution and driving forces of SOM in the semi-arid grassland open-pit coal mining area. The results show that: (1) Areas with high SOM content were mainly distributed in the north of open-pit germanium mine, west No. 2 open-pit mine, and No. 1 open-pit mine. Areas with low SOM content were mainly distributed on the east and southeast sides of the city. From the spatial distribution perspective, mining has a certain impact on SOM in the study area. (2) Natural factors have a higher impact on SOM changes than human factors. The order of influence degree of each factor on the spatial distribution of SOM is NDVI > Water > Agriculture > Mine > Town > Industry. The sources of influence on SOM in the research area are relatively complex. (3) The interaction between two factors presents two relationships: nonlinear enhancement and dual-factor enhancement. A single factor is lower than the interaction between various factors. In the interaction between factors, the explanation rate of interaction between Town, Agriculture, Mine, NDVI, Water, and all other factors is above 0.85. This study has important practical significance for soil management in mining areas, ecological restoration, and planning of national land space, etc.
The Extremely Metal-poor SN 2023ufx: A Local Analog to High-redshift Type II Supernovae
Authors: Tucker Michael A. , Hinkle Jason , Angus Charlotte R. , Auchettl Katie , Hoogendam Willem B. , Shappee Benjamin , Kochanek Christopher S. , Ashall Chris , de Boer Thomas , Chambers Kenneth C. , Desai Dhvanil D. , Do Aaron , Fulton Michael D. , Gao Hua , Herman Joanna , Huber Mark , Lidman Chris , Lin Chien-Cheng , Lowe Thomas B. , Magnier Eugene A. , Martin Bailey , Mínguez Paloma , Nicholl Matt , Pursiainen Miika , Smartt S. J. , Smith Ken W. , Srivastav Shubham , Tucker Brad E. , Wainscoat Richard J.
Published: November 2024

We present extensive observations of the Type II supernova (SN II) SN 2023ufx, which is likely the most metal-poor SN II observed to date. It exploded in the outskirts of a low-metallicity (Z
host ∼ 0.1 Z
⊙) dwarf (M

g
= −13.39 ± 0.16 mag, r
proj ∼ 1 kpc) galaxy. The explosion is luminous, peaking at M

g
≈ −18.5 mag, and shows rapid evolution. The r-band (pseudobolometric) light curve has a shock-cooling phase lasting 20 (17) days followed by a 19 (23) day plateau. The entire optically thick phase lasts only ≈55 days following explosion, indicating that the red supergiant progenitor had a thinned H envelope prior to explosion. The early spectra obtained during the shock-cooling phase show no evidence for narrow emission features and limit the preexplosion mass-loss rate to

M

̇

≲

10

−
3

M
⊙ yr−1. The photospheric-phase spectra are devoid of prominent metal absorption features, indicating a progenitor metallicity of ≲0.1 Z
⊙. The seminebular (∼60–130 days) spectra reveal weak Fe ii, but other metal species typically observed at these phases (Ti ii, Sc ii, and Ba ii) are conspicuously absent. The late-phase optical and near-infrared spectra also reveal broad (≈104 km s−1) double-peaked Hα, Pβ, and Pγ emission profiles suggestive of a fast outflow launched during the explosion. Outflows are typically attributed to rapidly rotating progenitors, which also prefer metal-poor environments. This is only the second SN II with ≲0.1 Z
⊙ and both exhibit peculiar evolution, suggesting a sizable fraction of metal-poor SNe II have distinct properties compared to nearby metal-enriched SNe II. These observations lay the groundwork for modeling the metal-poor SNe II expected in the early Universe.
Neutrino Constraints and Detection Prospects from Gamma-Ray Bursts with Different Jet Compositions
Authors: Ou Yang-Dong-Jun , Lü Hou-Jun , Chang Xue-Zhao , Liu Xiao-Xuan , Liang En-Wei
Published: November 2024

The prompt emission mechanism of gamma-ray bursts (GRBs) is a long-standing open question, and GRBs have been considered as potential sources of high-energy neutrinos. Despite many years of search for the neutrino events associated with GRBs from IceCube, there were no results. However, the absence of search results for neutrinos provides a unique opportunity to constrain the parameter space of GRB jet models. In this paper, we chose four peculiar GRBs with two different types of jet composition to investigate neutrino emission. It is found that only GRB 211211A could be well constrained within the dissipative photosphere model. By adopting the specific parameters of the photosphere, one can obtain ε

p
/ε

e
< 8 for f

p
> 0.2 from GRB 211211A. For the Internal-collision-induced Magnetic Reconnection and Turbulence (ICMART) model, we can effectively constrain neither GRB 230307A nor GRB 080916C. Moreover, we also investigate the detection prospects of high-energy neutrinos from GRBs and find that it is difficult to detect at least one high-energy neutrino associated with GRBs from the ICMART model even during the IceCube-Gen2 operation. For the GRB 211211A-like events, it is possible to detect at least one neutrino coincident with the gravitational wave during the IceCube-Gen2 operation, if such an event originated from mergers of compact stars within the photosphere dissipation.
Temporal Evolution of the Radial Distribution of Milky Way Satellite Galaxies
Authors: Patel Ekta , Chatur Lipika , Mao Yao-Yuan
Published: November 2024

The Milky Way (MW) is surrounded by dozens of satellite galaxies, with six-dimensional (6D) phase-space information measured for over 80% of this population. The spatial distribution of these satellites is an essential probe of galaxy formation and for mapping the MW’s underlying dark matter distribution. Using measured 6D phase-space information of known MW satellites, we calculate orbital histories in a joint MW+LMC potential, including the gravitational influence of the LMC on all satellites and on the MW’s center of mass, and dynamical friction owing to both galaxies, to investigate the evolution of the MW’s cumulative radial profile. We conclude that radial profiles become more concentrated over time when we consider the LMC’s gravitational influence and the group infall of LMC-associated satellites. The MW’s radial distribution is consistently more concentrated at the present day and 1 and 2 Gyr ago compared to recent surveys of nearby MW-like systems. Compared to MW-mass hosts in cosmological, zoom-in simulations, we find the MW’s radial profile is also more concentrated than those of simulated counterparts; however, some overlap exists between simulation results and our analysis of the MW’s satellite distribution 2 Gyr ago, pre-LMC infall. Finally, we posit that radial profiles of simulated MW-mass analogs also hosting an LMC companion are likely to evolve similarly to our results, such that the accretion of a massive satellite along with its satellites will lead to a more concentrated radial profile as the massive satellite advances toward its host galaxy.
Luminosity Function of Collapsar Gamma-Ray Bursts: The Progenitor of Long Gamma-Ray Bursts Is Not Singular
Authors: Qu 屈 Yan-Kun 艳坤 , Man Zhong-Xiao , Yi 仪 Shuang-Xi 双喜 , Yang 杨 Yu-Peng 玉鹏
Published: November 2024

Gamma-ray bursts (GRBs) are powerful probes of the high-redshift Universe. However, the proportion of collapsar GRBs among long GRBs and their event rate relative to the star formation rate (SFR) remain contentious issues. We assume that long GRBs with z ≥ 2 are all collapsar GRBs and construct the luminosity function using a high-redshift sample from the Swift satellite spanning 2004 to 2019. We model the luminosity function with a broken power-law form and consider three scenarios: no evolution, luminosity evolution, and density evolution. Our results are as follows: (1) The no-evolution model can be ruled out. (2) The fitting results indicate that to adequately explain the observations, a significant redshift evolution in either luminosity (evolution index

δ
=

1.54

−
0.22

+
0.21

) or density (

δ
=

2.09

−
0.26

+
0.29

) is required. This excludes the possibility that the evolution of long GRBs with redshift is due to contamination from noncollapsar GRBs. (3) The luminosity evolution model predicts that the number of collapsar GRBs with z < 2 and P ≥ 1 ph cm−2 s−1 is 138.6, accounting for 82.5% of the observed long GRBs with z < 2 and P ≥ 1 ph cm−2 s−1. The density evolution model predicts that the number of collapsar GRBs with z < 2 and P ≥ 1 ph cm−2 s−1 is 80.2, accounting for 47.7% of the observation. Regardless of the model, a substantial portion of the long GRBs are not collapsar GRBs.
The SPT-Chandra BCG Spectroscopic Survey. I. Evolution of the Entropy Threshold for ICM Cooling and AGN Feedback in Galaxy Clusters over the Last 10 Gyr
Authors: Calzadilla Michael S. , McDonald Michael , Benson Bradford A. , Bleem Lindsey E. , Croston Judith H. , Donahue Megan , Edge Alastair C. , Floyd Benjamin , Garmire Gordon P. , Hlavacek-Larrondo Julie , Huynh Minh T. , Khullar Gourav , Kraft Ralph P. , McNamara Brian R. , Noble Allison G. , Romero Charles E. , Ruppin Florian , Somboonpanyakul Taweewat , Voit G. Mark
Published: November 2024

We present a multiwavelength study of the brightest cluster galaxies (BCGs) in a sample of the 95 most massive galaxy clusters selected from the South Pole Telescope Sunyaev–Zeldovich (SZ) survey. Our sample spans a redshift range of 0.3 < z < 1.7, and is complete with optical spectroscopy from various ground-based observatories, as well as ground and space-based imaging from optical, X-ray, and radio wave bands. At z ∼ 0, previous studies have shown a strong correlation between the presence of a low-entropy cool core and the presence of both star formation and radio-loud active galactic nuclei in the central BCG. We show for the first time that the central entropy threshold for triggering star formation, which is universally seen in nearby systems, persists out to z ∼ 1, with only marginal (∼1σ) evidence for evolution in the threshold entropy value itself. In contrast, we do not find a similar high-z analog for an entropy threshold for feedback, but instead measure a strong evolution in the fraction of radio-loud BCGs in high-entropy cores, decreasing with increasing redshift. This could imply that the cooling-feedback loop was not as tight in the past, or that some other fuel source like mergers are fueling the radio sources more often with increasing redshift, making the radio luminosity an increasingly unreliable proxy for radio jet power. We also find that our SZ-based sample is missing a small (∼4%) population of the most luminous radio sources (ν
L

ν
> 1042 erg s−1), likely due to radio contamination suppressing the SZ signal with which these clusters are detected.
Chromosomes of Pseudapanteles dignus (Muesebeck, 1938) and a review of known karyotypes of the subfamily Microgastrinae (Hymenoptera, Braconidae)
Authors: Gokhman Vladimir E. , Luna María Gabriela , Vallina Consuelo , Bressa María José
Published: November 2024

The karyotype of Pseudapanteles dignus (Muesebeck, 1938), an important parasitoid of a serious tomato pest Phthorimaea (= Tuta) absoluta Meyrick, 1917 (Lepidoptera, Gelechiidae), in the Neotropics and adjacent regions, was studied for the first time using morphometric analysis and several techniques of differential chromosome staining, i.e., C-banding and staining with base-specific fluorochromes, together with fluorescence in situ hybridization (FISH) with an 18S rDNA probe. We found n = 7 and 2n = 14 in P. dignus, with seven metacentric chromosomes of similar size in the haploid set. C-banding revealed various C-positive bands, either centromeric or interstitial, on most chromosomes. Both AT-specific and GC-specific fluorochromes, 4’6-diamidino-2-phenylindole (DAPI) and chromomycin A3 (CMA3) respectively, showed uniform staining of chromosomes. FISH visualized a single subterminal rDNA site on a medium-sized metacentric. A brief review of known chromosome sets of the subfamily Microgastrinae (Braconidae) is given; certain features of karyotype evolution of this group are discussed.