Gabriel Danciu

Dr. Gabriel Danciu

Technology, Siemens SRL, 500007 Braşov, Romania; Transilvania University, 500024 Brasov, Romania
orcid

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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24 March 2025 in Journal of Medical Internet Research
Verified
Journal Article
Open access
AGAmelie GYRARD
Amelie GYRARD
SASomayeh Abedian
Somayeh Abedian
PGPhilip Gribbon
Philip Gribbon
GMGeorge Manias
George Manias
RNRick van Nuland
Rick van Nuland
RHRada Hussein
Rada Hussein
The adoption of the European Health Data Space (EHDS) regulation has made integrating health data critical for both primary and secondary applications. Primary use cases include patient diagnosis, prognosis, and treatment, while secondary applications support research, innovation, and regulatory decision-making. Additionally, leveraging large datasets improves training quality for artificial intelligence (AI) models, particularly in cancer prevention, prediction, and treatment personalization. The European Union (EU) has recently funded multiple projects under Europe’s Beating Cancer Plan. However, these projects face challenges related to fragmentation and the lack of standardization in metadata, data storage, access, and processing. This paper examines interoperability standards used in six EU-funded cancer-related projects: IDERHA (Integration of Heterogeneous Data and Evidence Towards Regulatory and Health Technology Assessments Acceptance), EUCAIM (European Cancer Imaging Initiative), ASCAPE (Artificial Intelligence Supporting Cancer Patients Across Europe), iHelp, BigPicture, and the HealthData@EU pilot. These initiatives aim to enhance the analysis of heterogeneous health data while aligning with EHDS implementation, specifically for the EHDS for the secondary use of data (EHDS2). Between October 2023 and July 2024, we organized meetings and workshops among these projects to assess how they adopt health standards and apply Internet of Things (IoT) semantic interoperability. The discussions focused on interoperability standards for health data, knowledge graphs, the data quality framework, patient-generated health data, AI reasoning, federated approaches, security, and privacy. Based on our findings, we developed a template for designing the EHDS2 interoperability framework in alignment with the new European Interoperability Framework (EIF) and EHDS governance standards. This template maps EHDS2-recommended standards to the EIF model and principles, linking the proposed EHDS2 data quality framework to relevant International Organization for Standardization (ISO) standards. Using this template, we analyzed and compared how the recommended EHDS2 standards were implemented across the studied projects. During workshops, project teams shared insights on overcoming interoperability challenges and their innovative approaches to bridging gaps in standardization. With support from HSbooster.eu, we facilitated collaboration among these projects to exchange knowledge on standards, legal implementation, project sustainability, and harmonization with EHDS2. The findings from this work, including the created template and lessons learned, will be compiled into an interactive toolkit for the EHDS2 interoperability framework. This toolkit will help existing and future projects align with EHDS2 technical and legal requirements, serving as a foundation for a common EHDS2 interoperability framework. Additionally, standardization efforts include participation in the development of ISO/IEC 21823-3:2021—Semantic Interoperability for IoT Systems. Since no ISO standard currently exists for digital pathology and AI-based image analysis for medical diagnostics, the BigPicture project is contributing to ISO/PWI 24051-2, which focuses on digital pathology and AI-based, whole-slide image analysis. Integrating these efforts with ongoing ISO initiatives can enhance global standardization and facilitate widespread adoption across health care systems.

6 October 2024 in Information
Verified
Journal Article
Open access
PDF file
MBMihai Bundea
Mihai Bundea
GDGabriel Danciu
Gabriel Danciu
Pulmonary diseases, including pneumonia, represent a significant health challenge and are often diagnosed using X-rays. This study investigates the effectiveness of artificial intelligence (AI) in enhancing the diagnostic capabilities of X-ray imaging. Using Python and the PyTorch framework, we developed and trained several deep learning models based on DenseNet architectures (DenseNet121, DenseNet169, and DenseNet201) on a dataset comprising 5856 annotated X-ray images classified into two categories: Normal (Healthy) and Pneumonia. Each model was evaluated on its ability to classify images with metrics including binary accuracy, sensitivity, and specificity. The results demonstrated accuracy rates of 92% for Normal and 97% for Pneumonia. The models also showed significant improvements in diagnostic accuracy and reduced time for disease detection compared to traditional methods. This study underscores the potential of integrating convolutional neural networks (CNNs) with medical imaging to enhance diagnostic precision and support clinical decision-making in the management of pulmonary diseases. Further research is encouraged to refine these models and explore their application in other medical imaging domains.

31 January 2022 in Applied Sciences
Verified
Journal Article
Open access
PDF file
GDGabriel Danciu
Gabriel Danciu
Alexandru DinuAlexandru Dinu
Alexandru Dinu
The functional verification process is one of the most expensive steps in integrated circuit manufacturing. Functional coverage is the most important metric in the entire verification process. By running multiple simulations, different situations of DUT functionality can be encountered, and in this way, functional coverage fulfillment can be improved. However, in many cases it is difficult to reach specific functional situations because it is not easy to correlate the required input stimuli with the expected behavior of the digital design. Therefore, both industry and academia seek solutions to automate the generation of stimuli to reach all the functionalities of interest with less human effort and in less time. In this paper, several approaches inspired by genetic algorithms were developed and tested using three different designs. In all situations, the percentage of stimulus sets generated using well-performing genetic algorithms approaches was higher than the values that resulted when random simulations were employed. In addition, in most cases the genetic algorithm approach reached a higher coverage value per test compared to the random simulation outcome. The results confirmed that in many cases genetic algorithms can outperform constrained random generation of stimuli, that is employed in the classical way of doing verification, considering coverage fulfillment level per verification test.

28 April 2022 in Micromachines
Verified
Journal Article
Open access
PDF file
Alexandru DinuAlexandru Dinu
Alexandru Dinu
GDGabriel Danciu
Gabriel Danciu
POPetre Lucian Ogrutan
Petre Lucian Ogrutan
Digital integrated circuits play an important role in the development of new information technologies and support Industry 4.0 from a hardware point of view. There is great pressure on electronics companies to reduce the time-to-market for product development as much as possible. The most time-consuming stage in hardware development is functional verification. As a result, many industry and academic stakeholders are investing in automating this crucial step in electronics production. The present work aims to automate the functional verification process by means of genetic algorithms that are used for generating the relevant input stimuli for full simulation of digital design behavior. Two important aspects are pursued throughout the current work: the implementation of genetic algorithms must be time-worthy compared to the application of the classical constrained-driven generation and the verification process must be implemented using tools accessible to a wide range of practitioners. It is demonstrated that for complex designs, functional verification powered by the use of genetic algorithms can go beyond the classical method of performing verification, which is based on constrained-random stimulus generation. The currently proposed methods were able to generate several sets of highly performing stimuli compared to the constraint-random stimulus generation method, in a ratio ranging from 57:1 to 205:1. The performance of the proposed approaches is comparable to that of the well-known NSGA-II and SPEA2 algorithms.

1 September 2012
Verified
Conference Paper
Closed access
SBSimona Maria Banu
Simona Maria Banu
GDGabriel Danciu
Gabriel Danciu
RBRazvan Gabriel Boboc
Razvan Gabriel Boboc
HMHoratiu Moga
Horatiu Moga
CBCristiana Balany
Cristiana Balany
In this paper a new method for face expression recognition is presented. Haar functions are used for face, eyes and mouth detection; edge detection for extracting the eyes correctly, and finally, Bezier curves to approximate the extracted regions. Then, a set of consecrated distances for each face type is extracted, set that will serve as training input for a multilayer neural network. We analyze the input data using a feed-forward neural network, trained and used for determining the class (Angry, Disgust, Fear, Happy, Neutral or Sad) of an arbitrary facial expression.

11 September 2024
Verified
Conference Paper
Open access
INIrina Emilia Nicolae
Irina Emilia Nicolae
GDGabriel Danciu
Gabriel Danciu
CNChristina Nanou
Christina Nanou
NKNikolaos Koulierakis
Nikolaos Koulierakis
VDVasiliki Danilatou
Vasiliki Danilatou
The digitalisation of medicine through artificial intelligence (AI)-based tools promises to revolutionise patient management by supporting big data analysis and decision-making capabilities. Central to these advancements is the overarching requirement of aligning the design and development of AI with established values and principles of AI and biomedical ethics. Motivated by an ongoing H2020 research project that aims to develop explainable and verifiable analytic AI models for personalised clinical management of heart failure (HF) patients, this work focuses on investigating and proposing assessment metrics aimed at evaluating the AI system's adherence to the requirement of transparency, in line with the European Commission's High-Level Expert Group (HLEG) Ethics Guidelines for Trustworthy Artificial Intelligence and its respective Assessment List for Trustworthy Artificial Intelligence (ALTAI). Our study combines existing metrics and proposes new ones to assess transparency in healthcare AI applications, offering insights transferable to other domains.