Publications by Daniel Sage | EPFL Graph Search

Comparison of Deconvolution Software: A User Point of View—Part 2

Deconvolution is an image processing technique that restores the effective object representation [3] [4], allowing to improve images analysis steps such as segmentation [1] or colocalization study [2]. We performed several deconvolution tests on different ...

EMS2010

A software solution for recording circadian oscillator features in time-lapse live cell microscopy

Michaël Unser, Daniel Sage

Background: Fluorescent and bioluminescent time-lapse microscopy approaches have been successfully used to investigate molecular mechanisms underlying the mammalian circadian oscillator at the single cell level. However, most of the available software and ...

BioMed Central Ltd.2010

Phosphorylation does not prompt, nor prevent, the formation of alpha-synuclein toxic species in a rat model of Parkinson's disease

Michaël Unser, Patrick Aebischer, Bernard Schneider, Daniel Sage, Samareh Azeredo da Silveira Lajaunias

Phosphorylation is involved in numerous neurodegenerative diseases. In particular, alpha-synuclein is extensively phosphorylated in aggregates in patients suffering from synucleinopathies. However, the share of this modification in the events that lead to ...

Oxford University Press2009

Vision-based system for the control and measurement of wastewater flow rate in sewer systems

David Andrew Barry, Luca Rossi, Daniel Sage, Laurent Son Nguyen, Salim Kayal

Combined sewer overflows and stormwater discharges represent an important source of contamination to the environment. However, the harsh environment inside sewers and particular hydraulic conditions during rain events reduce the reliability of traditional ...

IWA Publishing2009

Circadian gene expression is resilient to large fluctuations in overall transcription rates

Michaël Unser, Felix Naef, Daniel Sage, Thomas d'Eysmond

Mammalian circadian oscillators are considered to rely on transcription/translation feedback loops in clock gene expression. The major and essential loop involves the autorepression of cryptochrome (Cry1, Cry2) and period (Per1, Per2) genes. The rhythm-gen ...

Nature Publishing Group2009

Multiresolution Monogenic Signal Analysis Using the Riesz-Laplace Wavelet Transform

Michaël Unser, Dimitri Nestor Alice Van De Ville, Daniel Sage

The monogenic signal is the natural 2-D counterpart of the 1-D analytic signal. We propose to transpose the concept to the wavelet domain by considering a complexified version of the Riesz transform which has the remarkable property of mapping a real-value ...

Institute of Electrical and Electronics Engineers2009

Effect of aging on elastin functionality in human cerebral arteries

Michaël Unser, Nikolaos Stergiopoulos, Daniel Sage, Edouard Fonck, Jean Fasel

Aging affects elastin, a key component of the arterial wall integrity and functionality. Elastin degradation in cerebral vessels is associated with cerebrovascular disease. The goal of this study is to assess the biomechanical properties of human cerebral ...

ASA2009

Controlled Exchange of Chromosomal Arms Reveals Principles Driving Telomere Interactions in Yeast

Michaël Unser, Daniel Sage

The 32 telomeres in the budding yeast genome cluster in three to seven perinuclear foci. Although individual telomeres and telomeric foci are in constant motion, preferential juxtaposition of some telomeres has been scored. To examine the principles that g ...

Cold Spring Harbor Laboratory Press2008

Coupled tomography and distinct-element-method approach to exploring the granular media microstructure in a jamming hourglass

Giorgio Margaritondo, Michaël Unser, Thomas Liebling, Daniel Sage, Lionel Pournin, Slobodan Mitrovic, Marco Ramaioli, Michel Tsukahara, Vincent Gajdosik

We describe an approach for exploring microscopic properties of granular media that couples x-ray microtomography and distinct-element-method (DEM) simulations through image analysis. We illustrate it via the study of the intriguing phenomenon of instant a ...

APS2008

The Marr Wavelet Pyramid and Multiscale Directional Image Analysis

Michaël Unser, Dimitri Nestor Alice Van De Ville, Daniel Sage, Katarina Balac

The “Marr wavelet pyramid” is a wavelet decomposition that implements a multiscale version of the complex gradient-Laplace operator. It is closely linked to a multiresolution analysis of

L _{ 2 }

(\mathbb{R} ^{ 2 }

) and it has a fast filterbank im ...

EURASIP2008

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Comparison of Deconvolution Software: A User Point of View—Part 2

A software solution for recording circadian oscillator features in time-lapse live cell microscopy

Phosphorylation does not prompt, nor prevent, the formation of alpha-synuclein toxic species in a rat model of Parkinson's disease

Vision-based system for the control and measurement of wastewater flow rate in sewer systems

Circadian gene expression is resilient to large fluctuations in overall transcription rates

Multiresolution Monogenic Signal Analysis Using the Riesz-Laplace Wavelet Transform

Effect of aging on elastin functionality in human cerebral arteries

Controlled Exchange of Chromosomal Arms Reveals Principles Driving Telomere Interactions in Yeast

Coupled tomography and distinct-element-method approach to exploring the granular media microstructure in a jamming hourglass

The Marr Wavelet Pyramid and Multiscale Directional Image Analysis

Multiresolution Monogenic Signal Analysis Using the Riesz-Laplace Wavelet Transform

A software solution for recording circadian oscillator features in time-lapse live cell microscopy

Comparison of Deconvolution Software: A User Point of View—Part 2

Vision-based system for the control and measurement of wastewater flow rate in sewer systems

The Marr Wavelet Pyramid and Multiscale Directional Image Analysis

Controlled Exchange of Chromosomal Arms Reveals Principles Driving Telomere Interactions in Yeast

Effect of aging on elastin functionality in human cerebral arteries

Circadian gene expression is resilient to large fluctuations in overall transcription rates

Coupled tomography and distinct-element-method approach to exploring the granular media microstructure in a jamming hourglass

Phosphorylation does not prompt, nor prevent, the formation of alpha-synuclein toxic species in a rat model of Parkinson's disease