Gerontosociology

Advancing Gerontological Insights for a Healthier Tomorrow

Welcome, My Dear Visitor!

As a PhD candidate at Semmelweis University, my research focuses on the health-related attitudes, decisions, and health behaviors of the ageing population, with particular attention to the social and organizational dimensions of primary prevention. I created this website to provide a comprehensive overview of my research activities and their different directions.

On this site, I present the role and accessibility of Health Development Offices (HDOs), as well as their impact on the health behavior of older adults and the factors that influence the acceptance or rejection of preventive health services.

Another, methodologically oriented line of my research addresses the analysis of uncertainty and patterns underlying empirical data. Within this framework, I am developing and applying a novel metric, the Imprecision Entropy Indicator (IEI), which enables the quantitative assessment of informational uncertainty, concentration, and the structural characteristics of data patterns. This approach is applicable not only in the social sciences, but also in health sciences and decision-support contexts.

Uncertainty can be understood as the maximum amount of information carried by a given data pattern. The two- and three-dimensional spatial arrangement of data provides an information structure that can be analyzed through uncertainty per unit of concentration using the IEI indicator. When this measure is combined with average distance and directional components, it yields an entropy field, the analysis of which allows for a deeper understanding of the observed phenomenon.

The aim of this website is to present these conceptually distinct yet interrelated research directions within a unified interdisciplinary framework.

Thank you for visiting in my hompage and I look forward to collaborating with you to improve the health and well-being of our ageing population.

Peter Domjan

Semmelweis Universy

Doctoral College

PhD Candidate

  • PhD Scientific Days 2025 (07.07.2025; Budapest)

    I am honored to present at the PhD Scientific Days 2025 at Semmelweis University, where I will share our latest research on validating pre- and post-intervention questionnaires designed for elderly health promotion in Újbuda. Our project aims to develop and assess effective measurement tools that can capture the true impact of health interventions targeting the…

  • Spring Wind Conference 2025 (21.06.2025 Budapest)

    Between June 20–22, 2025, Semmelweis University will host the „Tavaszi Szél Conference” (Spring Wind Conference). My presentation is titled “Measuring the Uncertainty of Concentration in Healthcare Applications.” In this work, I introduce a modelling approach to quantify uncertainty in targeting tasks, using various search algorithms including Bayesian-adaptive models and examine their efficiency in a simulated…

  • XXIX International PhD – Young Researchers – Conference (25.04.2025 Budapest)

    Validation of Health Behavior Measurement Among Older Adults – A Pre-Post Study at the Újbuda Health Development Office This presentation, delivered at the XXIX International PhD – Young Researchers – Conference, introduces a research study led by Péter Domján and colleagues from Semmelweis University. The study examines the health attitudes and behavioral changes among elderly…

  • ORPHEUS 2025 (09.04.2025 – 12.04.2025, Cavtat, Croatia)

    I’ll be presenting at the ORPHEUS 2025 Conference: „Adapting Academia: Navigating PhD Programs Amidst World Crises and Changes,” hosted by the University of Zagreb. My presentation, titled „The Role of Health Development Offices in PhD Training and Navigating Crises in Translational Research,” will explore how Health Development Offices (HDOs) play a crucial role in addressing…

  • Bizonytalansági tényezők és az egészségfejlesztési irodák elérhetősége az idős lakosság számára (Uncertainty and the Accessibility of Health Development Offices for the Elderly Population)

    The presentation was prepared for the Selye EKÖP Scientific Forum 2025, held on March 20, 2025, at the Selye János Doctoral College for Advanced Studies, Semmelweis University. This research examines the spatial distribution and accessibility of Health Development Offices (HDOs) for elderly populations across Hungary. Using geospatial analysis, we assess the territorial balance of these…

  • A New Bayesian Approach to Increase Measurement Accuracy Using a Precision Entropy Indicator

    This study introduces the Imprecision Entropy Indicator (IEI), a novel metric designed to quantify and reduce uncertainty in clinical decision-making. By integrating Shannon entropy and statistical concentration measures, the IEI improves precision in fields such as radiotherapy planning, surgical target delineation, and genetic data analysis. The research applies a Bayesian adaptive learning framework and evaluates…