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
See detailLandscape pattern analysis using independent pattern components and landscape transformation processes.
Bogaert, Jan ULg

in The 19th Annual Symposium of the IALE US regional association. (2004)

Detailed reference viewed: 5 (0 ULg)
Full Text
Peer Reviewed
See detailLandscape Quality Assessment: from place to utopia
Vanderheyden, Vincent ULg; Schmitz, Serge ULg

in Changing European Landscapes. Landscape ecology, local to global. Proceedings. (2013, September 11)

Detailed reference viewed: 23 (7 ULg)
Full Text
Peer Reviewed
See detailLandscape research in Belgium
Antrop, Marc; Belayew, Dimitri; Droeven, Emilie ULg et al

in Belgeo (2004), 2-3

In the federal state Belgium, landscape research evolved from regional geographical monographs to more applied research that focuses upon the specific problems in each of the regions. In the highly ... [more ▼]

In the federal state Belgium, landscape research evolved from regional geographical monographs to more applied research that focuses upon the specific problems in each of the regions. In the highly urbanized Flanders region in the north, aspects of suburbanization and fragmentation are the most important. Landscape research involves geographers, historians, archaeologists, agronomists, foresters, ecologists and nature conservationists all dealing with specific goals and tasks. The integration is mainly achieved in spatial planning. In the Walloon region large areas are still rural and have a large forest cover, while urbanized zones are rather concentrated. Landscape research focuses here mainly upon the rural involving geographers, agronomists and planners. The natural and scenic aspects of the landscape dominate and the study of the historical development of the landscape is less pronounced. In Brussels Capital region little attention is given to landscape aspects, as social and typical urban problems dominate. Consequently, different landscape typologies are used in Belgium. [less ▲]

Detailed reference viewed: 148 (17 ULg)
Full Text
Peer Reviewed
See detailLandscape-level thresholds and newt conservation
Denoël, Mathieu ULg; Ficetola, G. Francesco

in Ecological Applications (2007), 17(1), 302-309

Ecological thresholds are defined as points or zones at which a rapid change occurs from one ecological condition to another. The existence of thresholds in species - habitat relationships has important ... [more ▼]

Ecological thresholds are defined as points or zones at which a rapid change occurs from one ecological condition to another. The existence of thresholds in species - habitat relationships has important implications for management, but the lack of concordance across studies and the wide range of methods used make generalizations difficult. We used two different statistical methods to test for the existence of thresholds for both individual species and the whole community, using three newt species as models. Based on a sample of 371 ponds, we found significant thresholds for both landscape configuration and composition. These were for the relationships between distance to forest and occurrence of Triturus alpestris and T. helveticus, and forest and crop cover and T. helveticus. Variability in the location of thresholds observed for the different species in this study caution against their use at the community level. Future studies should be based on the identification and assessment of thresholds for targeted species. Thresholds can be a useful concept from which tools may be developed to focus conservation effort for threatened species and their habitats. [less ▲]

Detailed reference viewed: 180 (16 ULg)
Full Text
See detailHet landschap aan de overkant
Delhalle, Nancy ULg

in Etcetera (2005), (97),

Detailed reference viewed: 2 (0 ULg)
Peer Reviewed
See detailLandslide detection from remote sensing images using statistical and ANN classification methods
Danneels, Gaëlle; Havenith, Hans-Balder ULg; Pirard, Eric ULg

in Geophysical Research Abstracts (2007)

Detailed reference viewed: 7 (0 ULg)
See detailLandslide detection methods and inventory analysis applied to the Tien Shan, Kyrgyz Republic
Havenith, Hans-Balder ULg; Danneels, Gaëlle; Strom, Alexander

in Geophysical Research Abstracts (2009)

Detailed reference viewed: 7 (3 ULg)
Full Text
Peer Reviewed
See detailLandslide Detection Methods, Inventory Analysis and Susceptibility Mapping Applied to the Tien Shan, Kyrgyz Republic.
Danneels, Gaëlle; Havenith, Hans-Balder ULg; Strom, A. et al

in Proc. of the First World Landslide Forum (2008)

This paper presents results of the last five years of landslide detection and landslide susceptibility mapping in the Central and Southern Tien Shan. Landslide inventories have been compiled for areas of ... [more ▼]

This paper presents results of the last five years of landslide detection and landslide susceptibility mapping in the Central and Southern Tien Shan. Landslide inventories have been compiled for areas of major interest in the Kyrgyz Republic. For those areas, landslides were first mapped manually using KFA satellite images and aerial photographs. Recently, a landslide detection method has been developed in order to map landslides automatically. This method is based on a neural network scheme applied to detect particular slope failure features from remote sensing data. Multi-spectral and/or panchromatic ASTER and SPOT images as well as digital elevation models (DEMs) are used as inputs. This automatic method is designed to map medium-size mass movements (105-107 m3). This approach supplements the manual mapping of large slope failures and helps to complete the inventory of mass movements and related landslide susceptibility/hazard maps for large areas within the Tien Shan. Size-frequency analyses have been applied to the two existing regional landslide inventories. These size-frequency analyses revealed the incompleteness of the respective inventories (in the low-size domain) as well as regional and local differences due to natural and anthropogenic influences. To be able to perform reliable susceptibility and size-frequency analyses, the completed inventories need to be verified. At present, we perform local verification by manual mapping and control, but automatic verification methods are being developed. They will also allow us to determine the level of uncertainties. Ongoing research is focused on the propagation of uncertainties throughout the chain of processing. [less ▲]

Detailed reference viewed: 174 (11 ULg)
Peer Reviewed
See detailLandslide hazard in the North Tanganyika - kivu rift zones: current knowledge and research perspective
Dewitte, Olivier; Albino, F; Delvaux, D et al

Poster (2013, November)

The North tanganyika – Kivu rift zones are areas naturally prone to landsliding where triggering and environmental factors that favour the occurrence of mass movement concentrate. In many places landslide ... [more ▼]

The North tanganyika – Kivu rift zones are areas naturally prone to landsliding where triggering and environmental factors that favour the occurrence of mass movement concentrate. In many places landslide hazard is very high, and anthropogenic factors such as land use change and urban expansion increase the sensibility to slope instability. From seismic to rainfall-induced mass movements we review the current knowledge of the various slope precesses and associated hazards that are present in these equatorial environments. A particular attention is given to urban areas such as Bukavu and Bujumbura where lanslide threat is particularly acute. Research perspectives on landslide inventorying, monitoring, and susceptibility and hazard assesment are presented. [less ▲]

Detailed reference viewed: 20 (2 ULg)
See detailLandslide risk analysis in the Mailuu-Suu valley (Kyrgyzstan) by means of remote sensing techniques
Danneels, Gaelle; Pirard, Eric ULg; Torgoev, Isakbek et al

in Geophysical Research Abstracts (2005)

Detailed reference viewed: 3 (0 ULg)
Full Text
See detailLandslide Susceptibility Zonation in case of deforestation in Northern Negros Natural Park (NNNP) - Philippines
Denis, Antoine ULg

Master's dissertation (2006)

The Philippines is one of the most severely deforested countries in Southeast Asia with around 7 percent remaining forest in 2005. Moreover, due to its geographic circumstances, it is one of the most ... [more ▼]

The Philippines is one of the most severely deforested countries in Southeast Asia with around 7 percent remaining forest in 2005. Moreover, due to its geographic circumstances, it is one of the most natural hazard prone countries in the world with frequent occurrence of earthquakes, volcanic eruptions and typhoons, resulting notably in an increasing occurrence of landslides and flash floods. This work focuses on the North Negros Island and especially the recently proclaimed Northern Negros Natural Park (NNNP) that is considered the largest remaining evergreen forest in Negros Island and one of the largest in the Central Philippines. Deforestation continues to be a threat for this forest. The fact that this forest is located in mountainous area and that, due to a very high land pressure, people always creep higher to cultivate the steep slopes of these mountains, increase the landslide susceptibility associated with this deforestation. As an answer to that situation, this research aimed two main objectives. In a first time a land cover map was produced through digital classification of a 2003 SPOT 5 satellite image focusing on attempt for forest types differentiation in NNNP. Given that conventional method using spectral characteristics of the image revealed to be unsuccessful for this differentiation, this was finally achieved with the use of elevation and the distance to river as classifiers. The land cover map produced has an overall accuracy of 89,2 %. In a second time, a Landslide Susceptibility Zonation (LSZ) model was designed and implemented in a Geographical Information System (GIS) environment. The nine selected landslide-controlling factors were built from raw data and then combined through Weighted Linear Combination (WLC).Two scenarios corresponding to a “stable forest scenario” and a “deforestation scenario” were modeled. The integration of the land cover map previously produced served successfully as the key factor that enabled to model the Landslide Susceptibility (LS) change due to potential deforestation in NNNP. A sensitivity analysis of the factors used for this modeling was realized by comparison with a “LSZ in case of deforestation” map based on the four main factors only (land cover, land cover change, slope and proximity to river). It appeared that, the LSZ model was not sensitive to the use of other factors than these four main ones. Finally, in order to give an idea of the reliability of the results, the LSZ maps were compared with a landslide inventory realized during the field survey in North Negros. Some limitations in the landslide inventory did not allow drawing pertinent conclusion from this comparison. In parallel and in order to evaluate the feasibility of integrating the land cover knowledge of local environmentalist into a GIS data base through field survey and 3D-GIS activity in a remote laboratory, a participatory 3D-GIS experience was attempted in Negros. Consistence of results between field and 3D-GIS laboratory experience validate this way of extracting land cover information, which could revealed useful for land cover identification of hardly accessible areas. [less ▲]

Detailed reference viewed: 115 (21 ULg)
Peer Reviewed
See detailLandslide Susceptibility, Hazard and Risk Mapping in Mailuu-Suu, Kyrgyzstan
Torgoev, Almazbek ULg; Havenith, Hans-Balder ULg

in Landslide Science and Practice (2013, October)

Detailed reference viewed: 16 (0 ULg)
Full Text
Peer Reviewed
See detailLandslides in the Mailuu-Suu Valley, Kyrgyzstan - Hazards and impacts
Havenith, Hans-Balder ULg; Torgoev, I.; Meleshko, A. et al

in Landslides (2006), 3(2), 137-147

Mailuu-Suu is a former uranium mining area in Kyrgyzstan (Central Asia) at the northern border of the Fergana Basin. This region is particularly prone to landslide hazards and, during the last 50 years ... [more ▼]

Mailuu-Suu is a former uranium mining area in Kyrgyzstan (Central Asia) at the northern border of the Fergana Basin. This region is particularly prone to landslide hazards and, during the last 50 years, has experienced severe landslide disasters in the vicinity of numerous nuclear waste tailing dams. Due to its critical situation, the Mailuu-Suu region was and still is the target area for several risk assessment projects. This paper provides a brief review of previous studies, past landslide events and a discussion on possible future risk scenarios. Various aspects of landslide hazard and related impacts in the Mailuu-Suu Valley are analyzed in detail: landslide susceptibility, historical evolution of landslide activity, size-frequency relationship, river damming and flooding as well as impacts on inhabited areas and nuclear waste storage zones. The study was carried out with standard remote sensing tools for the processing of satellite imagery and the construction of digital elevation models (DEMs). The processed inputs were combined on a GIS platform with digital landslide distribution maps of 1962, 1977, and 2003, digitized geological and geographic maps, and information from landslide monitoring and geophysical investigation. As a result, various types of landslide susceptibility maps based on conditional analysis (CA) are presented as well as predictions of future landslide activity and related damming potential and their possible impact on the population. For some risk scenarios, remediation and prevention measures are suggested. [less ▲]

Detailed reference viewed: 51 (1 ULg)
Full Text
Peer Reviewed
See detailLand´e factors for even-parity 5pnp and 5pnf J = 1, 2 levels along the Rydberg series of Sn I
Xu, J.; You, S.; Zhang, Y. et al

in Journal of Physics : B Atomic Molecular & Optical Physics (2009), 42

Land´e g-factors have been measured by time-resolved laser-induced fluorescence and Zeeman quantum-beat techniques for the even-parity levels of the J = 1 5pnp (n = 11–13, 15–19) and J = 2 5pnp (n = 11–13 ... [more ▼]

Land´e g-factors have been measured by time-resolved laser-induced fluorescence and Zeeman quantum-beat techniques for the even-parity levels of the J = 1 5pnp (n = 11–13, 15–19) and J = 2 5pnp (n = 11–13, 15–19, 31, 32), 5pnf (n = 4, 5, 9–19, 22, 23) Rydberg series and for all the 5p7p and 5p8p perturbing levels of neutral tin. A two-colour two-step excitation scheme was used in the experiment. The experimental results have been compared with theoretical g-values obtained by the multichannel quantum defect theory and the relativistic Hartree–Fock theory, respectively. In most cases, the theoretical values agree well with the experimental data. [less ▲]

Detailed reference viewed: 15 (0 ULg)
Peer Reviewed
See detailLe langage à l'envers
Steinmetz, Rudy ULg

in Louvain : Revue Mensuelle de l'Université Catholique de Louvain et de l'Association des Anciens et Amis de l'UCL (1999)

Detailed reference viewed: 7 (0 ULg)
Full Text
See detailLe langage caché des plantes : Rôle des composés organiques volatils de la rhizosphère.
Fiers, Marie ULg

Scientific conference (2010, November 09)

Detailed reference viewed: 33 (4 ULg)
See detailLe langage de l'enfant : développement et évaluation
Comblain, Annick ULg

in Piérart, Bernadette (Ed.) Introduction à la psychologie de l'enfant (2005)

Detailed reference viewed: 117 (27 ULg)