Philippe JEAN-PIERRE

---

• Type de publi. : Article dans une revue
• Date de publi. : 01/09/2009
• Auteurs : Philippe DubuissonRobert FrouinDavid DessaillyLucile Duforêt-GaurierJean-François LéonKenneth VossDavid Antoine
• Organismes : Laboratoire d’Optique Atmosphérique - UMR 8518 Scripps Institution of Oceanography Ecosystèmes littoraux et côtiers Université du Littoral Côte d'Opale Ecosystèmes littoraux et côtiers Université du Littoral Côte d'Opale Laboratoire d’Optique Atmosphérique - UMR 8518 University of Miami [Coral Gables] Laboratoire d'océanographie de Villefranche
• Publié dans Remote Sensing of Environment le 28/10/2020

---

Résumé : A methodology is proposed to infer the altitude of aerosol plumes over the ocean from reflectance ratio measurements in the O2 absorption A-band (759 to 770 nm). The reflectance ratio is defined as the ratio of the reflectance in a first spectral band, strongly attenuated by O2 absorption, and the reflectance in a second spectral band, minimally attenuated. For a given surface reflectance, simple relations are established between the reflectance ratio and the altitude of an aerosol layer, as a function of atmospheric conditions and the geometry of observation. The expected accuracy for various aerosol loadings and models is first quantified using an accurate, high spectral resolution, radiative transfer model that fully accounts for interactions between scattering and absorption. The method is developed for POLDER and MERIS, satellite sensors with adequate spectral characteristics. The simulations show that the method is only accurate over dark surfaces when aerosol optical thickness at 765 nm is relatively large (> 0.3). In this case, the expected accuracy is on the order of ± 0.5 km or ± 0.2 km for POLDER or MERIS respectively. More accurate estimates are obtained with MERIS, since in this case the spectral reflectance ratio is more sensitive to aerosol altitude. However, a precise spectral calibration is needed for MERIS. The methodology is applied to MERIS and POLDER imagery acquired over marine surfaces. The estimated aerosol altitude is compared with in situ lidar profiles of backscattering coefficient measured during the AOPEX-2004 experiment for MERIS, or obtained with the space-borne lidar CALIOP for POLDER. The retrieved altitudes agree with lidar measurements in a manner consistent with theory. These comparisons demonstrate the potential of the differential absorption methodology for obtaining information on aerosol altitude over dark surfaces.

---

Source

---

• Type de publi. : Article dans une revue
• Date de publi. : 01/09/2009
• Auteurs : Stéphanie SahuguedeD. FafchampsAnne Julien-VergonjanneG. RodriguezJean-Pierre CancesPhilippe Gallion
• Organismes : C2S2 Télécommunications Optiques Communications Numériques Département Communications & Electronique C2S2 Communications Numériques Département Communications & Electronique C2S2 Télécommunications Optiques Département Communications & Electronique
• Publié dans IEEE Photonics Technology Letters le 26/10/2020

---

Résumé : Without being restrictive, optical signal propagation simulations performed in the case of a new concept of packet ring network pointed out that the Gaussian model is not sufficiently accurate to constitute a valuable model of noise-corrupted optical systems. This fact can be generalized to any common wavelength-division-multiplexing systems, using on-off keying transmissions where amplified spontaneous emission is the main noise source. In this letter, we propose an alternative chi-square model, which is more accurate and corrects deficiencies of the Gaussian model. In such specific channel, we design an error-correcting scheme based on low-density parity check (LDPC) codes associated to soft decoding. The performance of a chi-square-based LDPC soft decoder and a Gaussian-based one are compared, both applied to a real chi-square optical channel. We point out that the design can be done assuming an additive white Gaussian noise statistic but also that considering the real channel statistics is essential to achieve optimal performance.

---

Source

---

• Type de publi. : Article dans une revue
• Date de publi. : 01/09/2009
• Auteurs : Jean-Philippe TardifPeter SturmMartin TrudeauSébastien Roy
• Organismes : Département d'Informatique et de Recherche Opérationnelle [Montreal] Interpretation and Modelling of Images and Videos Département d'Informatique et de Recherche Opérationnelle [Montreal] Département d'Informatique et de Recherche Opérationnelle [Montreal]
• Publié dans IEEE Transactions on Pattern Analysis and Machine Intelligence le 31/10/2020

---

Résumé : We present algorithms for plane-based calibration of general radially distorted cameras. By this we understand cameras that have a distortion center and an optical axis such that the projection rays of pixels lying on a circle centered on the distortion center, form a right viewing cone centered on the optical axis. The camera is said to have a single viewpoint (SVP) if all such viewing cones have the same apex (the optical center), otherwise we speak of NSVP cases. This model encompasses the classical radial distortion model [4], fisheyes and most central or non-central catadioptric cameras. Calibration consists in the estimation of the distortion center, the opening angles of all viewing cones and their optical centers. We present two approaches of computing a full calibration from dense correspondences of a single or multiple planes with known Euclidean structure. The first one is based on a geometric constraint linking viewing cones and their intersections with the calibration plane (conic sections). The second approach is an homography-based method. Experiments using simulated and a broad variety of real cameras show great stability. Furthermore, we provide a comparison with Hartley-Kang's algorithm [14], which however can not handle such a broad variety of camera configurations, showing similar performance.

---

Fichiers liés : TardifSturmTrudeauRoy-PAMI2008.pdf

---

Source

---

• Type de publi. : Article dans une revue
• Date de publi. : 01/09/2009
• Auteurs : J.C. EspinozaJean-Loup GuyotJosyane RonchailGérard CochonneauNaziano FilizolaPascal FraizyDavid LabatEurides de OliveiraJuan Julio OrdoñezPhilippe Vauchel
• Organismes : Universidad Nacional Agraria La Molina Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques Institut de Recherche pour le Développement Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques Institut de Recherche pour le Développement Universidade do Estado do Amazonas = University of the Amazon State Institut de Recherche pour le Développement Université Toulouse III - Paul Sabatier Agencia Nacional de Águas SENAMHI LIMA PER Institut de Recherche pour le Développement
• Publié dans Journal of Hydrology le 23/10/2020

---

Source

---

• Type de publi. : Article dans une revue
• Date de publi. : 01/09/2009
• Auteurs : J.C. EspinozaJosyane RonchailJean Loup GuyotGérard CochonneauFilizola NazianoWaldo LavadoEurides de OliveiraRodrigo PombosaPhilippe Vauchel
• Organismes : Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques Université Paris Diderot - Paris 7 Agencia Nacional de Águas
• Publié dans International Journal of Climatology le 31/10/2020

---

Résumé : Not Available

---

Source

---

• Type de publi. : Article dans une revue
• Date de publi. : 01/09/2009
• Auteurs : Philippe NubukpoPaola RevueCecil HerrmannJean-Pierre Clément
• Organismes : Neuroépidémiologie Tropicale et Comparée Centre de Mémoire de Ressources et de Recherches [Limoges] Hôpital Psychiatrique La Valette Neuroépidémiologie Tropicale et Comparée Service de Psychiatrie [CHU Limoges]
• Publié dans Psychologie & neuropsychiatrie du vieillissement le 13/08/2014

---

Résumé : Ethnopsychiatry is defined as an approach aimed to understand the ethnic and cultural dimensions of mental illnesses. The triple interest of cross-cultural approach in psychiatry in the elderly is highlighted by a review of the literature and five clinical vignettes. The first interest is to help the diagnosis of mental disorders in aged immigrants. The second is to take into account the ethnopsychogeriatric specificities by the sanitary and social systems. The third involves some aspects of psychiatry in the elderly in Sub-Saharan Africa. With aging, the immigrant has to reinvent, successfully or not, new rationalizations of his/her presence. Moreover, he/she often presents a premature physical over-deterioration linked to difficult existing conditions. Caring for the elderly from an ethnopsychiatric approach supposes firstly, to grant him correct life and physical health conditions; secondly, training of professionals to consider their specific cultural dimensions and at last, adapting the care and help services. Ethnopsychiatry or cultural psychiatry in the elderly must take into account the social and cultural representations of the diseases. Presently, depression among the elderly is common in Africa and dementia is not rare.

---

Source

---

• Type de publi. : Article dans une revue
• Date de publi. : 01/09/2009
• Auteurs : Marie-Paule BeaujardSandra Chantot-BastaraudMichèle DuboisBoris KerenWassila CarpentierPhilippe MabbouxSandra WhalenMichel VodovarJean-Pierre SiffroiMarie-France Portnoi
• Organismes : CHU Trousseau [APHP] AP-HP - Hôpital de la Pitié Salpêtrière Plateforme Post-génomique de la Pitié-Salpêtrière Université Pierre et Marie Curie - Paris 6 CHU Trousseau [APHP] CHU Trousseau [APHP] CHU Trousseau [APHP] CHU Trousseau [APHP]
• Publié dans European Journal of Medical Genetics le 22/10/2020

---

Résumé : Despite the heterogeneous clinical presentations, the majority of patients with 22q11.2 deletion syndrome (22q11.2 DS) have either a common recurrent 3 Mb deletion or a less common, 1.5 Mb nested deletion, with breakpoint sites in flanking low-copy repeats (LCR) sequences. Only a small number of atypical deletions have been reported and precisely defined. Haploinsufficiency of the TBX1 gene was determined to be the likely cause of 22q11.2 DS. The diagnostic procedure usually used is FISH using commercially probes (N25 or TUPLE1). However, this test does not contain TBX1, and fails to detect deletions that are either proximal or distal to the FISH probes. Here, we report on two patients with clinical features suggestive of 22q11.2 DS, a male infant with facial dysmorphia, pulmonary atresia, ventricular septal defect, neonatal hypocalcemia, and his affected mother, with facial dysmorphia, learning disabilities, and hypernasal speech. They were tested negative for 22q11.2 DS using N25 or TUPLE1 probes, but were shown deleted for a probe containing TBX1. Delineation of the deletion was performed using high-density SNP arrays (Illumina, 370K). This atypical deletion was spanning 1.89 Mb. The distal breakpoint resided in LCR-D, sharing the same distal breakpoint with the 3 Mb common deletion. The proximal breakpoint was located 105 kb telomeric to TUPLE1, representing a new breakpoint variant that does not correspond to known LCRs of 22q11.2. We conclude that FISH with the TBX1 probe is an accurate diagnostic tool for 22q11.2 DS, with a higher sensitivity than FISH using standard probes, detecting all but the rarest deletions, greatly reducing the false negative rate.

---

Source

---

• Type de publi. : Communication dans un congrès
• Date de publi. : 01/09/2009
• Auteurs : Léonide CeliniVirginie RoyEdouard MiambiPhilippe MoraCorinne RoulandL. AurelaF. GuiriaboyeC. JacobyJean VaillantGladys Loranger-Merciris
• Organismes : Biogéochimie et écologie des milieux continentaux Biogéochimie et écologie des milieux continentaux Biogéochimie et écologie des milieux continentaux Biogéochimie et écologie des milieux continentaux Biogéochimie et écologie des milieux continentaux Laboratoire de Mathématiques Informatique et Applications Biodiversité et fonctionnement des sols

---

Résumé : Acromyrmex octospinosus (Reich), est une fourmi champignonniste qui vit dans un nid souterrain en symbiose avec un champignon du genre Leucoagrinus. Elle est la seule espèce du genre Acromyrmex recensée en Guadeloupe et est appelée " Fourmi manioc". C'est une espèce invasive; découverte en 1954, dans une seule localité, elle est présente dans presque toute la totalité de l'île. Fourmi défoliatrice, elle s'attaque à de nombreuses cultures (vivrières, fruitières,....) et actuellement, elle représente un danger pour certaines espèces patrimoniales et des essences forestières. L'objectif du projet est de proposer des solutions de lutte efficaces mais respectueuses de la santé et de l'environnement et qui s'intègrent dans un schéma de développent durable de la Guadeloupe.

---

Source

---

• Type de publi. : Article dans une revue
• Date de publi. : 01/09/2009
• Auteurs : Caroline Schluth-BolardBruno DelobelDamien SanlavilleOdile BouteJean-Marie CuissetSylvie SuknoAudrey LabalmeBénédicte Duban-BeduGhislaine PlessisSylvie JaillardChristèle DubourgCatherine HenryJosette LucasSylvie OdentLaurent PasquierHenri CopinPhilippe LatourMarie-Pierre CordierGwenaël NadeauMarianne TillPatrick EderyJoris Andrieux
• Organismes : Service de cytogénétique constitutionnelle Centre de Génétique Chromosomique [Hôpital Saint Vincent de Paul] Service de cytogénétique constitutionnelle Laboratoire de Génétique Clinique Service de Neuropédiatrie [Lille] Service de Neuropédiatrie Service de cytogénétique constitutionnelle Centre de Génétique Chromosomique [Hôpital Saint Vincent de Paul] Service de Génétique [CHU Caen] Institut de Génétique et Développement de Rennes Service de Cytogénétique et de Biologie Cellulaire Institut de Génétique et Développement de Rennes Service de biologie moléculaire Service de Cytogénétique et de Biologie Cellulaire Service de Cytogénétique et de Biologie Cellulaire Institut de Génétique et Développement de Rennes Service de génétique clinique [Rennes] Institut de Génétique et Développement de Rennes Service de génétique clinique [Rennes] Laboratoire de Cytogénétique Laboratoire de Neurogénétique Service de Génétique Service de Cytogénétique Service de cytogénétique constitutionnelle Service de cytogénétique constitutionnelle Service de Génétique clinique
• Publié dans European Journal of Medical Genetics le 22/10/2020

---

Résumé : Investigations of apparently balanced chromosomal rearrangements in patients with abnormal phenotype by molecular cytogenetics tools, especially by array CGH, revealed a proportion of unsuspected imbalances. It was estimated recently that 40% of apparently balanced de novo translocations with abnormal phenotype were associated with cryptic deletion. We explored 47 unrelated mental retardation patients carrying an apparently balanced chromosomal rearrangement with high-resolution oligonucleotides arrays. We included 33 de novo cases (21 translocations, 7 inversions and 5 complex chromosomal rearrangements (CCR)) and 14 inherited cases (7 translocations, 5 inversions and 2 CCR). Twenty of the 47 cases (42.6%) carried a cryptic deletion ranging from 60 kb to 15.37 Mb. It concerned 16/33 de novo rearrangements (8/21 translocations, 4/7 inversions and 4/5 CCR) and 4/14 inherited rearrangements (1/7 translocations, 2/5 inversions and 1/2 CCR). The proportion of imbalances was not statistically different between de novo and inherited cases. Our results support that about 40% apparently balanced chromosomal rearrangements with abnormal phenotype are in fact imbalanced and that these rearrangements should be systematically investigated by array CGH independently of their de novo or inherited character.

---

Fichiers liés : EJMG-D-08-00173_1_.pdf

---

Source

---

• Type de publi. : Communication dans un congrès
• Date de publi. : 31/08/2009
• Auteurs : Bruno PaganoOlivier AndrieuThomas MoniotBenjamin CanouEmmanuel ChaillouxPhilippe WangPascal ManouryJean-Louis Colaço
• Organismes : Algorithmes, Programmes et Résolution Algorithmes, Programmes et Résolution Algorithmes, Programmes et Résolution Preuves, Programmes et Systèmes

---

Résumé : High-level tools have become unavoidable in industrial software development processes. Safety-critical embedded programs don't escape this trend. In the context of safety-critical embedded systems, the development processes follow strict guidelines and requirements. The development quality assurance applies as much to the final embedded code, as to the tools themselves. The French company Esterel Technologies decided in 2006 to base its new SCADE SUITE 6TM certifiable code generator on Objective Caml. This paper outlines how it has been challenging in the context of safety critical software development by the rigorous norms DO-178B, IEC 61508, EN 50128 and such.

---

Source