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Jan 06, 2026Open    Access

Analyzing the Factors Influencing Sovereign Credit Ratings in East Africa

Milliam Niyonshuti,Madina Ishimwe,Min Su,Edward Nketia
This study utilizes an ordered probit model to analyze the determinants of sovereign credit ratings for East African countries from 2010 to 2022, based on ratings from major agencies. The findings reveal that the impact of various macroeconomic factors—such as GDP growth, GDP per capita, external debt, current account balance, inflation, and unemployment—differs according to the income level of each country. In high-income countries, GDP and the rule of law are the most significant determinants,...
Open Access Library J.   Vol.13, 2026
Doi:10.4236/oalib.1113552


Jan 05, 2026Open    Access

Epigenetic Markers in Criminal Investigation: A Narrative Synthesis of Recent Evidence

Eduarda Felipe Tosta,ícaro Ricardo Rodrigues de Oliveira,Maycon Douglas de Paula Martins,Lauro Ant?nio Ribeiro Roman Loza,Ana Júlia Carvalho Rezende,Sabrina Pessoa de Moraes,Vítor Sousa Silva,Fábio Morato de Oliveira
Forensic epigenetics has become a rapidly expanding frontier in molecular forensics, offering analytical capabilities that surpass those of traditional genetic markers. Advances in high-resolution methylome profiling, small-RNA analysis, and multi-omics approaches now support increasingly precise inferences about biological age, tissue origin, lifestyle exposures, and, in some cases, individual differentiation. Despite this progress, the field remains transitional, and its adoption in routine fo...
Open Access Library J.   Vol.13, 2026
Doi:10.4236/oalib.1114662


Jan 05, 2026Open    Access

Correlation between hCG Kinetics and the Effectiveness of Methotrexate in the Management of Ectopic Pregnancies

Oum Elkheir Soltana Senouci,Fadl-Allah Aboubekr,Hind Bedjaoui,Mimouna Messaoud,Ikram Tachema
Purpose: To evaluate a therapeutic monitoring strategy for ectopic pregnancies treated with methotrexate (MTX) injection based on hCG level kinetics, in order to identify patients at low risk of treatment failure. Materials and Methods: This series of 14 cases allowed us to evaluate the success rate of therapeutic management with a single injection of methotrexate (MTX), based on the kinetics of hCG levels. The protocol stipulated that if the decrease was greate...
Open Access Library J.   Vol.13, 2026
Doi:10.4236/oalib.1114676


Dec 29, 2025Open    Access

Epigenetic mechanisms that interact in the development of social insects

Carlos Castellanos-Zacarías,álvaro Domínguez-Rebolledo,Rosa Us-Camas,Juan Baeza-Rodríguez,Roberto Zamora-Bustillos,Arturo Rodríguez-Salinas,Jorge Vivas-Rodríguez,Julio Ramón-Ugalde,Henry Loeza-Concha
Epigenetic mechanisms regulate and stabilize a broad range of biological processes without altering the primary DNA sequence. This regulation is achieved through DNA methylation, post-translational histone modifications (PTMs), and non-coding RNAs (ncRNAs). These mechanisms facilitate rapid and flexible changes in gene expression in response to environmental cues such as temperature, humidity, nutrition, and chemical exposure. Upon detection of these signals, the neuroendocrine system relays the...
Open Access Library J.   Vol.12, 2025
Doi:10.4236/oalib.1114693


Dec 29, 2025Open    Access

Implementing Ghana’s Inclusive Education Policy in Basic Schools: Leadership Challenges and Practical Strategies for Headteachers

Lydia Ama Fuah Hayford,James Asare
This article examined the implementation of Ghana’s 2015 Inclusive Education Policy in basic schools, focusing on the leadership role of headteachers. Drawing on international frameworks such as Salamanca and the Convention on the Rights of Persons with Disabilities (CRPD), national policy documents, and empirical literature from Ghana, the paper analyzed key challenges, including limited resources, inadequate teacher preparation, infrastructural barriers, rigid curriculum and assessment systems...
Open Access Library J.   Vol.12, 2025
Doi:10.4236/oalib.1114670


Dec 29, 2025Open    Access

From “Relational System” to “Cultural Mechanism”: Chinese Warlord Politics (1916-1928)

Yuanhang Chen
Hsi-sheng Chi’s 1976 English monograph *Warlord Politics in China, 1916-1928* was the first to systematically construct an analytical paradigm of “relation-culture” in the study of Beiyang warlord politics. This research broke away from the traditional class-based historical view and regarded the warlord group as a dynamically operating power balance system. Its core innovations lie in: 1) employing political science and sociological theories to deconstruct warlord factions, proposing three sust...
Open Access Library J.   Vol.12, 2025
Doi:10.4236/oalib.1114655


Dec 29, 2025Open    Access

A Case Report on Round Pneumonia in a Geriatric Patient

Thenmozhi Ganesh,Mohankumar Manavalan,Sai Sathya Shree Rathinam,Vishali Amuthan,Yuvashree Prammanathan
Round pneumonia is a rare clinical entity in adults and may radiographically resemble malignant lung lesions, often leading to diagnostic uncertainty. We present the case of a geriatric patient with a background of diabetes mellitus, hypertension and lichen sclerosis who arrived with a five-day history of fever, generalised body ache, right ear pain, fatigue and decreased appetite. She was febrile with mild tachycardia, and her investigations revealed leukocytosis, significantly raised C-reactiv...
Open Access Library J.   Vol.12, 2025
Doi:10.4236/oalib.1114568


Dec 29, 2025Open    Access

The Use of Diode and Erbium Lasers in Fixed Prosthesis Systematic Review

Abdallah Mouhibi,Houda Moussaoui,Amine Chafii
Introduction: The integration of lasers in dental practice has experienced real extent thanks to the advantages and facilities they present. This technology has shown remarkable results namely in the surgery of soft tissues as well as hard tissues. In dentistry, and essentially in joint prostheses, the most lasers used are Diode laser and Erbium laser. These lasers facilitated interventions and optimizing treatment plans. Objective: The main purpose of our systematic review was to show the contr...
Open Access Library J.   Vol.12, 2025
Doi:10.4236/oalib.1114034


Dec 29, 2025Open    Access

Helicobacter pylori Seroprevalence among Students: A Case Study of the Higher Institute of Medical Techniques of Lubumbashi and the University of Lubumbashi

Kamona Charles Kimuni,A. Mbaz Ruth Kamb,Mukadila Nathalie Mavila,Kabengele Arlette Ndaya,Mulongo Pauline Kalenga,Lusenge Nono Ndete,Mwema Guy Numbi,Ilunga Eric Kasamba
The WHO lists H. pylori as one of the 20 pathogens that pose the greatest threat to human health due to their antibiotic resistance and classifies it as a Group 1 gastric carcinogen, directly linked to stomach cancer. This study aimed to determine the prevalence of H. pylori infection among students in Lubumbashi and to test the associations between serological results and sex, age, and the presence of gastritis attack. This was a descriptive cross-sectional study conducted fro...
Open Access Library J.   Vol.12, 2025
Doi:10.4236/oalib.1114616


Dec 29, 2025Open    Access

Study Time Management as a Predictor of Academic Achievement of Secondary School Students in Mombasa County, Kenya

Rehema Nthenya Yaki,Edward Kigen,Samuel Mutua Mutweleli
The central problem of this study is academic underachievement of secondary school students over the years. Schools in Kenya, especially in Mombasa County are facing a big problem of poor quality grades which may be attributed to students’ spending minimal time on school activities and giving up easily when faced with difficulties. Poor quality grades have been consistently realized due to students’ inability to identify with academics and failure to connect current school performance to future ...
Open Access Library J.   Vol.12, 2025
Doi:10.4236/oalib.1114596


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