Quentin Nicolas

University of California, Berkeley | UCB · Department of Earth and Planetary Science

Recent geomagnetic observations reveal localized oscillations in the field's secular acceleration at high latitudes, with periods of about 20 years. Several types of waves in rotating magnetized fluids have been proposed to explain equatorial oscillations with similar high frequencies. Among these are non-axisymmetric Alfvén waves, magneto-Coriolis...

Spatial patterns of tropical rainfall are strongly influenced by mountains. Although theories for precipitation induced by convectively stable upslope ascent exist for the midlatitudes, these do not represent the interaction of moist convection with orographic forcing. Here, we present a theory for convective precipitation produced by the mechanica...

Over most tropical land areas, the annual peak in precipitation occurs during summer, associated with the local monsoon circulation. However, in some coastal regions in the tropics the bulk of annual precipitation occurs in autumn, after the low-level summer monsoon westerlies have abated. Examples include the Nordeste region of Brazil, southeaster...

Background & Aims Despite improvements in medical and surgical techniques, post-hepatectomy liver failure (PHLF) remains the leading cause of postoperative death. High postoperative portal vein pressure (PPV) and portocaval gradient (PCG), which cannot be predicted by current tools, are the most important determinants of PHLF. Therefore, we aimed t...

Introduction L’imagerie de fluorescence au vert d’indocyanine (ICG) s’est développée en chirurgie hépatobiliaire et transplantation hépatique (TH), initialement par analyse qualitative des images et désormais avec quantification. L’incidence des non-fonctions primaires du greffon après TH reste non négligeable et il n’existe que très peu de facteur...

Introduction L’hypertension portale postopératoire est un facteur de risque majeur de décompensation hépatique. Pourtant, il reste très difficile de prédire, pour un patient donné, l’étendue de la résection qui restera compatible avec un faible risque d’insuffisance hépatique. Nous avons développé un modèle mathématique qui, par analogie à un circu...

Introduction: The incidence of primary non-function (PNF) after liver transplantation (LT) remains a major concern with the increasing use of marginal grafts. Indocyanine green (ICG) fluorescence is an imaging technique used in hepatobiliary surgery and LT. Because few early predictors are available, we aimed to quantify in real time the fluoresce...