Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Peer Reviewed
See detailL’intégration de l’estompage dans les spatiocartes
Donnay, Jean-Paul ULg

in Bulletin de la Société Géographique de Liège (2000), 38

Detailed reference viewed: 10 (0 ULg)
Full Text
See detailIntégration de la continuité spatiale dans la structure multidimensionnelle d’un entrepôt de données - SOLAP raster
Kasprzyk, Jean-Paul ULg

Doctoral thesis (2015)

Technological advances in recent decades have created a massive acquisition of digital data whose volume grows exponentially. To efficiently extract the information they contain, powerful tools have been ... [more ▼]

Technological advances in recent decades have created a massive acquisition of digital data whose volume grows exponentially. To efficiently extract the information they contain, powerful tools have been developed to collect, store and analyze these data. These tools are gathered in a discipline called “business intelligence”. Among them, data warehouses are responsible for archiving data by structuring them in a multidimensional way (time, space or others). They are called data hypercubes or data cubes when they are limited to three dimensions. Hypercubes can supply OLAP (On Line Analytical Processing) systems that aim at quickly synthesizing information in interactive tables and charts for decision-makers from various fields: marketing, environment, criminology, etc. Thus, users can navigate into hypercubes using OLAP operations such as slicing on dimension members (e.g. data aggregation for the month of January in the time dimension), or drilling into hierarchies (e.g. switching from the “year” level to the “month” level in the time dimension). When OLAP is coupled with spatial analysis techniques supplied by geographic information systems (GIS), a map interface then improves the exploration of data: OLAP operations can be applied to dimensions defined in the geographical space (spatial drilling or spatial slicing). This kind of tool is called SOLAP (Spatial OLAP). SOLAP tools currently available on the market all suffer from the same deficiency: they are unable to represent spatial dimensions (X, Y) in a continuous way. This representation is nevertheless essential for the management of spatially continuous phenomena (temperature, pollution, etc.) but also for visualizing spatially discrete events (product sales, crimes, etc.) while minimizing the Modifiable Areal Unit Problem (MAUP). This kind of visualization is used especially by the police to predict the location of future crimes through hotspot maps which are generated by the Kernel Density Estimation (KDE) method. In the field of GIS, raster data (as opposed to vector data) enable effective representation of spatial continuity through digital georeferenced grids. Whereas current SOLAP tools only consider vector data, our research uses the raster model to integrate spatial continuity into the multidimensional structure of a data warehouse feeding a SOLAP ("raster SOLAP"). Despite its underutilization in the SOLAP literature, the raster model has many similarities with a particular kind of data cube: the MOLAP cube (Multidimensional OLAP). Like a satellite image (raster) representing the two planimetric spatial dimensions and one "spectral band" dimension, a MOLAP cube is a three dimensional array whose cells’ coordinates (similar to raster pixels) enable an efficient indexation of dimensions’ members (describing the analyzed facts). In a first original model that we call "raster cube" we define the bases for a three-dimensional raster SOLAP, starting from the definition of a MOLAP cube. Unlike vector SOLAP - where spatiality is attached to a semantic dimension through pointers to geometries - our model directly integrates spatial dimensions (X, Y) in the multidimensional structure of the data warehouse. With this original feature, any geographical entity (country, building, road, etc.) can be imported on the fly as a member in the analysis of the user, which is hardly possible with conventional vector SOLAP tools. An extension of this SOLAP model, called "raster hypercube", is then developed by entrusting the management of extra non-spatial dimensions to a relational database management system (Relational OLAP or ROLAP). The raster hypercube is then populated by KDE raster fields representing crime densities, which are defined in a continuous space (raster dimensions) through time and crime types (ROLAP dimensions). Our model is able to combine the production of hotspot maps at different scales of analysis with SOLAP navigation operations: slicing on spatial or non-spatial members, and drilling into the hierarchy of spatial or non-spatial dimensions. Our raster hypercube model is validated by an operating prototype which is based on open source tools only. Several datasets are integrated through KDE fields, including crime data from London and Seattle. At the end of our work, the results of a comparative study between raster SOLAP and vector SOLAP demonstrate that hybrid vector/raster SOLAP architectures present the same interest for spatial data as hybrid ROLAP/MOLAP architectures do for purely semantic data (management of detailed hypercubes [less ▲]

Detailed reference viewed: 324 (69 ULg)
Full Text
See detailIntégration de la longévité et redéfinition des objectifs de sélection
Félix, Alain; Vanderick, Sylvie ULg; Gengler, Nicolas ULg

Article for general public (2006)

La Wallonie participe aux évaluations pour la longévité d'INTERBULL depuis le mois de mars 2005. Cette période a permis de s'assurer de la validité et de la stabilité de nos méthodes d'évaluations mais ... [more ▼]

La Wallonie participe aux évaluations pour la longévité d'INTERBULL depuis le mois de mars 2005. Cette période a permis de s'assurer de la validité et de la stabilité de nos méthodes d'évaluations mais également d'étudier la prise en compte de ce nouveau paramètre dans l'objectif de sélection. [less ▲]

Detailed reference viewed: 30 (9 ULg)
Full Text
Peer Reviewed
See detailIntegration de la pharmacogenetique dans la pratique medicale
Dideberg, Vinciane ULg; Bours, Vincent ULg

in Revue Médicale de Liège (2005), 60(12), 918-22

Today, the initiation of any medical treatment still raises questions about its efficacy and safety. Indeed, therapeutic responses vary over time and between individuals and are influenced by age, sex ... [more ▼]

Today, the initiation of any medical treatment still raises questions about its efficacy and safety. Indeed, therapeutic responses vary over time and between individuals and are influenced by age, sex, other treatments and the pathology itself. Genetic factors are thought to be responsible for 20 to 95% of these individual variations. Recent advances in biotechnology, molecular genetics and genomics allow a better understanding of drug metabolism and action. Pharmacogenetics, compiling phenotypic and genotypic data, may lead to a more personalized treatment. To allow a better approach of pharmacogenetics and pharmacogenomics, we will define these two terms and describe their actual and future clinical application. [less ▲]

Detailed reference viewed: 68 (0 ULg)
See detailIntégration de tablettes numériques dans la formation des futurs enseignants: une étude de cas
Parlascino, Emmanuelle ULg; Joris, Noémie ULg

Conference (2015, July)

À travers cette recherche, les auteurs visent à mettre en évidence, chez les étudiants, les apports réels, en termes d’apprentissages et de développement professionnel, de situations d’enseignement ... [more ▼]

À travers cette recherche, les auteurs visent à mettre en évidence, chez les étudiants, les apports réels, en termes d’apprentissages et de développement professionnel, de situations d’enseignement intégrant une technologie, à savoir les tablettes numériques. Le groupe d’étude se constitue d’un enseignant en histoire en haute école pédagogique et de trois classes d’étudiants en formation pour devenir enseignants. Ce groupe fera l’objet d’une analyse approfondie au travers d’observations filmées, examinées à l’aide de grilles, et de commentaires réflexifs (de l’enseignant et des étudiants) issus d’entretiens d’autoconfrontation sur divers extraits des situations d’enseignement menées et vécues. Cette méthodologie conduira à croiser plusieurs types d’informations : (1) les objectifs de l’enseignant au moment de préparer la situation d’enseignement, (2) sa perception des apports mis en place à travers la technologie, (3) la perception de ses étudiants et (4) les observations des auteurs. Soucieux de contribuer à l’analyse réflexive sur l’intérêt d’intégrer le numérique en éducation, les auteurs veulent mettre en évidence les apports réels de l’activité, les points de passage obligés et les principales difficultés de sa mise en place. Ces résultats pourront éclairer les enseignants souhaitant se lancer dans ce genre d’activité innovante. [less ▲]

Detailed reference viewed: 68 (7 ULg)
Full Text
See detailL'intégration des équations aux dérivés partielles des deux premiers ordres par P. Mansion : rapport de F. Folie
Folie, François ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1873), 2e série, t. 36(12), 653-657

The author establishes a report on a P. Mansion’s work concerning the integration of the equations of partial derivatives of two first orders and presents some general observations on the work’s ... [more ▼]

The author establishes a report on a P. Mansion’s work concerning the integration of the equations of partial derivatives of two first orders and presents some general observations on the work’s composition. [less ▲]

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
See detailL’intégration des Marocains en Belgique, un processus tripartite
Gsir, Sonia ULg

Conference (2015, March 12)

Detailed reference viewed: 19 (2 ULg)
Peer Reviewed
See detailL’intégration des Marocains en Belgique, un processus tripartite?
Gsir, Sonia ULg

in Ben Khalifa, Riadh (Ed.) Actes du colloque Etrangers au Maghreb, Maghrébins à l’étranger : XIXe-XIXe siècles (in press)

Detailed reference viewed: 19 (0 ULg)
See detailL’intégration des Marocains en Belgique, un processus tripartite?
Gsir, Sonia ULg

Scientific conference (2015)

Detailed reference viewed: 10 (0 ULg)
See detailL'intégration des nouvelles technologies de l'information et de la communication dans les cours de langues
Yans, Baudoin ULg

in Education : tribune libre d'information et de discussion pédagogiques (2000)

Detailed reference viewed: 16 (1 ULg)
Full Text
See detailL'intégration des parents dans un service de néonatalogie lourde
Battisti, Oreste ULg

Master of advanced studies dissertation (1992)

Detailed reference viewed: 83 (13 ULg)
Full Text
Peer Reviewed
See detailL'intégration du comportement comme variable dans la recherche psychopharmacologique
Richelle, Marc ULg

in Journal de Physiologie (1968), 60(suppl. 1), 149-203

Detailed reference viewed: 5 (0 ULg)
Full Text
See detailIntégration du stress microbien pour le scaling-up des bioréacteurs
Delvigne, Frank ULg

Scientific conference (2013)

Detailed reference viewed: 19 (7 ULg)