Damià Segrelles

Damià Segrelles
Universitat Politècnica de València | UPV · Department of Computer Systems and Computation

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57
Publications
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435
Citations

Publications

Publications (57)
Article
Full-text available
A combination of distributed multi-tenant infrastructures, such as public Clouds and onpremises installations belonging to different organisations, are frequently used for scientific research because of the high computational requirements involved. Although resource sharing maximises their usage, it typically causes undesirable effects such as the...
Article
Full-text available
Training on Grid technologies have traditionally used existing Grid infrastructures to implement the hands-on education activities. However, these infrastructures are insufficient to develop all training skills as they can only be employed for the development of Grid applications, and they are limited for learning the management and configuration o...
Article
Full-text available
Software programming is one of the key abilities for the development of Computational Thinking (CT) skills in Science, Technology, Engineering and Mathematics (STEM). However, specific software tools to emulate realistic scenarios are required for effective teaching. Unfortunately, these tools have some limitations in educational environments due t...
Article
Full-text available
Cloud computing instruction requires hands-on experience with a myriad of distributed computing services from a public cloud provider. Tracking the progress of the students, especially for online courses, requires one to automatically gather evidence and produce learning analytics in order to further determine the behavior and performance of studen...
Article
Full-text available
PRIMAGE is one of the largest and more ambitious research projects dealing with medical imaging, artificial intelligence and cancer treatment in children. It is a 4-year European Commission-financed project that has 16 European partners in the consortium, including the European Society for Paediatric Oncology, two imaging biobanks, and three promin...
Chapter
Full-text available
This paper describes an approach to integrate the jobs management of High Performance Computing (HPC) infrastructures in cloud architectures by managing HPC workloads seamlessly from the cloud job scheduler. The paper presents hpc-connector, an open source tool that is designed for managing the full life cycle of jobs in the HPC infrastructure from...
Article
Full-text available
Background Scientific publications are meant to exchange knowledge among researchers but the inability to properly reproduce computational experiments limits the quality of scientific research. Furthermore, bibliography shows that irreproducible preclinical research exceeds 50%, which produces a huge waste of resources on nonprofitable research at...
Preprint
The suitability of cloud computing has been studied by several authors to run scientific applications. However, the unpredictable performance fluctuations in these environments hinders the migration of scientific applications to cloud providers. To mitigate these effects, this work presents RUPER-LB, a load balancer for loosely-coupled iterative pa...
Conference Paper
Full-text available
Hoy en día, los entornos computaciones son clave en las titulaciones STEM, dado que mejoran significativamente sus procesos de enseñanza-aprendizaje. Por ello, las universidades buscan la racionalización de las infraestructuras de cómputo que dan soporte a dichos entornos, con el objetivo de abaratar su coste (adquisición y mantenimiento). En este...
Article
Full-text available
Diffusion Weighted Imaging (DWI) methods (ADC and IVIM models) extract meaningful information about the microscopic motions of water of human tissues from MRIs. This is a non invasive method which plays an important role in the diagnosis of ischemic strokes, high grade gliomas or tumors.
Article
Full-text available
Computed tomography (CT) is one of the most widely used methods in Medical Imaging. Despite of its relevance in the diagnosis of diseases with a high impact in our society (such as cancer), it is one of the most potentially harmful modalities. CT requires a high X-ray dose to be induced to the patients. Solving the CT Image Reconstruction problem i...
Chapter
William Morton wrote the first radiology report in 1896. It was written in narrative mode and with no consensual content (Fig. 11.1). In 1923 Charles D. Enfield emphasized that the radiologist provided detailed descriptions, without expressing his opinion on the clinical relevance of such descriptions, which could benefit the patient [1]. However,...
Article
Full-text available
Internet of Things (IoT) technologies can facilitate the preventive conservation of cultural heritage (CH) by enabling the management of data collected from electronic sensors. This work presents an IoT architecture for this purpose. Firstly, we discuss the requirements from the artwork standpoint, data acquisition, cloud processing and data visual...
Article
Background: Radiology reports are commonly written on free-text using voice recognition devices. Structured reports (SR) have a high potential but they are usually considered more difficult to fill-in so their adoption in clinical practice leads to a lower efficiency. However, some studies have demonstrated that in some cases, producing SRs may re...
Article
The ODISEA platform provides Virtualized Computational Environments (VCEs) on cloud providers as the computational infrastructure to support educational activities. A VCE consists of a collection of one or more Virtual Machines (VMs) to which the students connect from their own computers. In this paper a case study is presented in the architecture...
Conference Paper
Full-text available
Education in Engineering requires bringing the students to scenarios as close to reality as possible. Indeed, the new technologies have fostered the development of a wide spectrum of Computational Environments (CE), such as simulators, virtual laboratories or specific software tools. These environments typically share the same Physical Hardware Res...
Conference Paper
Full-text available
This paper describes the application of a Cloud Computing platform (ODISEA) to deploy and manage the infrastructure required to support remote computational labs across subjects that address computer-related topics such as Cloud Computing, Big Data and Scalable Architectures. ODISEA enables the lecturer to describe using a high level language the r...
Article
Full-text available
This paper presents a software platform to dynamically deploy complex scientific virtual computing infrastructures, on top of Infrastructure as a Service Clouds. The platform orchestrates different services to provision the virtual computing resources. It dynamically installs the appropriate software to satisfy the requirements of a researcher, bot...
Article
This paper describes a methodology for redesigning the clinical processes to manage diagnosis, follow-up, and response to treatment episodes of breast cancer. This methodology includes three fundamental elements: (1) identification of similar and contrasting cases that may be of clinical relevance based upon a target study, (2) codification of repo...
Conference Paper
Medical image processing promises major advances in medicine as higher fidelity images are produced. One challenge is to effectively apply filtering techniques in order to facilitate diagnosis or reduce radiation exposure. In many cases, achieving good results in filtering requires to set proper input parameters. These optimum parameters can be fou...
Conference Paper
Medical image processing promises major advances in medicine as higher fidelity images are produced. One challenge is to effectively apply filtering techniques in order to facilitate diagnosis or reduce radiation exposure. In many cases, achieving good results in filtering requires set proper input parameters. Those optimum parameters can be found...
Conference Paper
This work describes how the ODISEA platform has been used in Electrical Installations (INEL), a subject of the Bachelor's Degree in Architecture, which is taught by lecturers from the School of Architecture (ETSA) at the Universitat Politècnica de València (UPV). ODISEA is able to deploy virtual resources on Clouds, allowing the creation of customi...
Conference Paper
En este artículo se describe el uso de la plataforma ODISEA en cuatro asignaturas del Máster Universitario en Computación Paralela y Distribuida (MUCPD) de la Universitat Politècnica de València (UPV). Esta plataforma permite desplegar recursos computacionales sobre proveedores Cloud específicamente configurados para soportar actividades educativas...
Conference Paper
Full-text available
This paper presents a software platform to dynamically deploy complex scientific virtual computing infrastructures, on top of Infrastructure as a Service (IaaS) Clouds. The platform orchestrates different services to provision the virtual computing resources. It dynamically installs the appropriate software to satisfy the requirements of a research...
Conference Paper
Full-text available
TRENCADIS is a Grid infrastructure to store and to process large amounts of medical images and its associated data in DICOM objects. This system enables radiologists to effectively group, search and manipulate images and structured reports in order to relate clinical findings and to be of practical value in the diagnosis and treatment of diseases....
Article
Intuitive interfaces of mobile devices facilitate the introduction of structured data in breast cancer management, leading to an increase of completeness and accuracy of diagnosis and follow-up evaluations, as well as opening the door for more effective content-based retrieval techniques for clinical decision support.
Article
Biomedical applications are often built on top of knowledge bases that contain medical images and clinical reports. Currently, these bases are being used to improve diagnosis, research and teaching, but in many cases, the infrastructure required has a prohibitive cost for many medical centres. However, resources can be attached from existing e-Scie...
Article
The main advantage of Grid computing over other distributed computing paradigms is its capability to coordinate the access to data and resources in a virtual multi-institutional environment. To this end, the information system plays a decisive role in selecting the services that meet the applications needs. This paper presents an information system...
Article
Full-text available
This article describes the process of defining and implementing new components to exchange data between two real GRID-based platforms for breast cancer diagnosis. This highly collaborative work in development phase pretends to allow communication between middleware, namely TRENCADIS and DRI, in different virtual organizations. On the one hand, TREN...
Article
The study of meta-scheduling of jobs in the Grid has been a recurrent topic on the literature. Many tools have been developed for allocating the jobs to the most appropriate resources according to specific application needs while balancing the workload among resources. However, few of them focus on evaluating the level of service attained by provid...
Conference Paper
This article describes the process of defining and implementing new components to exchange data between two real GRID-based platforms for breast cancer diagnosis. This highly collaborative work in development phase pretends to allow communication between middleware, namely TRENCADIS and DRI, in different virtual organizations. On the one hand, TREN...
Article
The problem of sharing medical information among different centres has been tackled by many projects. Several of them target the specific problem of sharing DICOM images and structured reports (DICOM-SR), such as the TRENCADIS project. In this paper we propose sharing and organizing DICOM data and DICOM-SR metadata benefiting from the existent depl...
Article
Full-text available
The integration of multi-centre medical image data to create knowledge repositories for research and training activities has been an aim targeted since long ago. This paper presents an environment to share, to process and to organise medical imaging data according to a structured framework in which the image reports play a key role. This environmen...
Article
Full-text available
Integrating medical data at inter-centre level implies many challenges that are being tackled from many disciplines and technologies. Medical informatics have applied an important effort on describing and standardizing Electronic Health Records, and specially standardisation has achieved an important extent on Medical Imaging. Grid technologies hav...
Article
The use of data Grids for sharing relevant data has proven to be successful in many research disciplines. However, the use of these environments when personal data are involved (such as in health) is reduced due to its lack of trust. There are many approaches that provide encrypted storages and key shares to prevent the access from unauthorized use...
Conference Paper
TRENCADIS (towards a grid environment to process and share DICOM objects) is a data sharing infrastructure based on grid technologies that federate distributed repositories of radiological studies using ontological models on the information of the structured reports. TRENCADIS has demonstrated its efficiency in data sharing. This work describes an...
Chapter
Full-text available
Despite the advances that have been made in Grid acceptance and adoption, further efforts are needed to ensure that the required level of service predictability is achieved. QoS issues require close attention, especially those aspects related to the evaluation of specific service activities with the aim of ensuring that the execution of a task prod...
Conference Paper
Full-text available
This paper emphasizes the development and application of technologies to effective guarantying the confidentiality and integrity of patient data in Gridenabled biomedical applications. By strongly focusing on the interaction between security technologies and the human environment, this paper relates the experience of developing a model for the stor...
Article
Full-text available
Today most European healthcare centers use the digital format for their databases of images. TRENCADIS is a software architecture comprising a set of services as a solution for interconnecting, managing and sharing selected parts of medical DICOM data for the development of training and decision support tools. The organization of the distributed in...
Conference Paper
The creation of virtual repositories of medical data is a very important challenge to ease collaboration, research and training among medical organisations. However, there are several technical and legal problems, such as efficient large data distribution, privacy protection, post-processing and knowledge management. The TRENCADIS project is aiming...
Article
Full-text available
The vast amount in complexity of data generated in Genomic Research implies that new dedicated and powerful computational tools need to be developed to meet their analysis requirements. Blast2GO (B2G) is a bioinformatics tool for Gene Ontology-based DNA or protein sequence annotation and function-based data mining. The application has been develope...
Article
Full-text available
The adoption of the digital processing of medical data, especially on radiology, has leaded to the availability of millions of records (images and reports). However, this information is mainly used at patient level, being the extraction of information, organised according to administrative criteria, which make the extraction of knowledge difficult....
Conference Paper
Medical Imaging implies executing complex post-processing tasks such as segmentation, rendering or registration which requires resources that exceeds the capabilities of conventional systems. The usage of Grid Technologies can be an efficient solution, increasing the production time of shared resources. However, the difficulties on the use of Grid...
Article
This article presents a Middleware based on Grid Technologies that addresses the problem of sharing, transferring and processing DICOM medical images in a distributed environment using an ontological schema to create virtual communities and to define common targets. It defines a distributed storage that builds-up virtual repositories integrating di...
Conference Paper
Full-text available
Most medical imaging departments of hospital and primary care services in developed countries have migrated in the last years to full digital storing, management and processing. The availability of clinical medical images is larger than ever, but the exploitation of its intrinsic knowledge is poor. Hospitals, clinics and primary care centres store...
Article
Full-text available
This paper presents an architecture defined for searching and executing Clinical Decision Support Systems (CDSS) in a LCG2/GT2 Grid environment, using web-based protocols. A CDSS is a system that provides a classification of the patient illness according to the knowledge extracted from clinical practice and using the patient's information in a stru...
Conference Paper
The work described in this paper presents a distributed software architecture for accessing high performance and parallel computing resources from web applications. The architecture is designed for the case of medical image processing, although the concept can be extended to many other application areas. Parallel computing algorithms for medical im...
Article
Full-text available
The work described in this paper presents a middleware (MW) that has been developed using Grid technologies oriented to the management of digital medical images in DICOM format. The main objective of this MW is to provide transparent access to the resources concerning medical imaging, shared within virtual organizations (VOs). Resources are shared...
Article
Una de las áreas que más se ha beneficiado del soporte digital es la imagen médica, reforzada por la aparición del estándar Digital Imaging and Communication in Medicine (DICOM), evolucionado a lo largo de los años para soportar no sólo imágenes médicas sino otros tipos de información médica como videos, señales e incluso informes estructurados (DI...

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