An optimized and load-balanced portable parallel zbuffer

International audienceThis paper describes the parallel implementation of the Zbuffer algorithm on different kinds of distributed memory machines. In computer graphics domain, the Zbuffer is one of the most popular and fastest techniques to generate a surfacic representation of a scene consisting of objects in a 3-dimensional world. To improve this method we develop a parallel algorithm which uses a hypercube topology, load-balancing techniques and portable global communications phases

An optimized and load-balanced portable parallel zbuffer

International audienceThis paper describes the parallel implementation of the Zbuffer algorithm on different kinds of distributed memory machines. In computer graphics domain, the Zbuffer is one of the most popular and fastest techniques to generate a surfacic representation of a scene consisting of objects in a 3-dimensional world. To improve this method we develop a parallel algorithm which uses a hypercube topology, load-balancing techniques and portable global communications phases

Langue(s) et nationalisme(s)

The Larson Studio Collection contains portraits and landscape photographs from Thomas Larson and his son O. Blaine Larson, who operated the Larson Studio in Provo, Utah County, Utah

Société d'histoire du Droit et des Institutions des Pays Flamands, Picards et Wallons, Journées Internationales de Dunkerque (28-31 mai 1981)

Dams J., Leman Pierre, Merck A., Godding Philippe, Soetermeer F., Platelle Henri, Laret-Kayser Arlette, Cauchies Jean-Marie, Dickstein-Bernard Claire, Trénard Louis, Van Peteghem P., Douxchamps-Lefèvre Cécile, Lorgnier Jacques. Société d'histoire du Droit et des Institutions des Pays Flamands, Picards et Wallons, Journées Internationales de Dunkerque (28-31 mai 1981). In: Revue du Nord, tome 64, n°252, Janvier-mars 1982. Amiens de jadis et de naguère. pp. 223-242

Société d'histoire du Droit et des Institutions des Pays Flamands, Picards et Wallons, Journées Internationales de Dunkerque (28-31 mai 1981)

Dams J., Leman Pierre, Merck A., Godding Philippe, Soetermeer F., Platelle Henri, Laret-Kayser Arlette, Cauchies Jean-Marie, Dickstein-Bernard Claire, Trénard Louis, Van Peteghem P., Douxchamps-Lefèvre Cécile, Lorgnier Jacques. Société d'histoire du Droit et des Institutions des Pays Flamands, Picards et Wallons, Journées Internationales de Dunkerque (28-31 mai 1981). In: Revue du Nord, tome 64, n°252, Janvier-mars 1982. Amiens de jadis et de naguère. pp. 223-242

Machine Learning Analysis of the Cerebrovascular Thrombi Proteome in Human Ischemic Stroke: An Exploratory Study

International audienceObjective: Mechanical retrieval of thrombotic material from acute ischemic stroke patients provides a unique entry point for translational research investigations. Here, we resolved the proteomes of cardioembolic and atherothrombotic cerebrovascular human thrombi and applied an artificial intelligence routine to examine protein signatures between the two selected groups.Methods: We specifically used n = 32 cardioembolic and n = 28 atherothrombotic diagnosed thrombi from patients suffering from acute stroke and treated by mechanical thrombectomy. Thrombi proteins were successfully separated by gel-electrophoresis. For each thrombi, peptide samples were analyzed by nano-flow liquid chromatography coupled to tandem mass spectrometry (nano-LC-MS/MS) to obtain specific proteomes. Relative protein quantification was performed using a label-free LFQ algorithm and all dataset were analyzed using a support-vector-machine (SVM) learning method. Data are available via ProteomeXchange with identifier PXD020398. Clinical data were also analyzed using SVM, alone or in combination with the proteomes.Results: A total of 2,455 proteins were identified by nano-LC-MS/MS in the samples analyzed, with 438 proteins constantly detected in all samples. SVM analysis of LFQ proteomic data delivered combinations of three proteins achieving a maximum of 88.3% for correct classification of the cardioembolic and atherothrombotic samples in our cohort. The coagulation factor XIII appeared in all of the SVM protein trios, associating with cardioembolic thrombi. A combined SVM analysis of the LFQ proteome and clinical data did not deliver a better discriminatory score as compared to the proteome only.Conclusion: Our results advance the portrayal of the human cerebrovascular thrombi proteome. The exploratory SVM analysis outlined sets of proteins for a proof-of-principle characterization of our cohort cardioembolic and atherothrombotic samples. The integrated analysis proposed herein could be further developed and retested on a larger patients population to better understand stroke origin and the associated cerebrovascular pathophysiology

Société d'histoire du Droit et des Institutions des Pays Flamands, Picards et Wallons. Journées Internationales d' Utrecht (12-15 mai 1983)

Van Luyn Pierre, Platelle Henri, Cauchies Jean-Marie, Kuys Jan, Roelofsen C.-G., Van Winter Johanna Maria, Vermaas M.-H., Van Peteghem P., Douxchamps-Lefèvre Cécile, Koenheim A.C., Rousseaux Xavier, Pfister-Langanay Christian, Stevens Fred, Martinage Renée. Société d'histoire du Droit et des Institutions des Pays Flamands, Picards et Wallons. Journées Internationales d' Utrecht (12-15 mai 1983) . In: Revue du Nord, tome 66, n°260, Janvier-mars 1984. pp. 393-410