Evaluation and improvement of the sustainability of organic farming : elements for debate (2009)
CAPITAINE, M., DAVID, C., FREYCENON, R.
Synthetic overview of the second workshop : Evaluation and improvement of the sustainability of organic farming.
Studies of the Antarctic stratosphere during IPY (2009)
Klekociuk, A. R., Pitts, M. C., Alexander, S. P., David, C., Snels, M.
Evaluation and improvement of the sustainability of organic farming : elements for debate (2009)
CAPITAINE, M., DAVID, C., FREYCENON, R.
Synthetic overview of the second workshop : Evaluation and improvement of the sustainability of organic farming.
Herzen, J., Donath, T., Pfeiffer, F., Bunk, O., Padeste, C., Beckmann, F., ...
Over the last few years, differential phase-contrast x-ray computed tomography (PC-CT) using a hard x-ray grating interferometer and polychromatic x-ray tube sources has been developed. The method...
Michael Joseph Waddell, Michael Waddellinformatics. Com, Statistics Advisor, Dr. C. David, National Merit Scholar
Boy Scout Eagle Award
MULTIPLE-BEAM INTERFERENCE LITHOGRAPHY WITH ELECTRON BEAM WRITTEN GRATINGS (2008)
H. H. Solak, B. Steinacher, C. David, J. Gobrecht (psi
We have demonstrated by analytical derivation, numerical simulations and experimental results that transmission diffraction gratings written on a single substrate can be used to control the relative...
X-Ray Coherent Diffraction Microscopy of Extended Objects (2008)
F. Pfeiffer, M. Dierolf, O. Bunk, I. Johnson, P. Thibault, A. Menzel, ...
We report on the recent development of a lensless coherent diffraction microscopy scheme, which is based on the combination of ptychography with an iterative phase retrieval algorithm [1]. The method...
Amirbekian, V, Brigger, I, Raynaud, J, Ballet, S, David, C, ...
Bipolar ozone loss rates measured by ozonesonde Match campaigns during IPY (2008)
Rex, M., Deckelmann, H., Harris, N. R. P., Allaart, M., Andersen, S. B., ...
X-ray imaging with the PILATUS 100k detector (2008)
Bech, M., Bunk, O., David, C., Kraft, P., Brönnimann, C., Eikenberry, E.K., ...
Coherent Diffractive Imaging Using Phase Front Modifications (2008)
Johnson, I., Jefimovs, K., Bunk, O., David, C., Dierolf, M., Gray, J., ...
Grünzweig, C., Pfeiffer, F., Bunk, O., Donath, T., Kühne, G., Frei, G., ...
Dynamical theory for diffractive x-ray imaging of one-dimensional periodic objects (2008)
Nygård, K., Satapathy, D.K., Bunk, O., Pfeiffer, F., David, C., Van Der Veen, J.F.
Neutron Decoherence Imaging for Visualizing Bulk Magnetic Domain Structures (2008)
Grünzweig, C., David, C., Bunk, O., Dierolf, M., Frei, G., Kühne, G., ...
Here we introduce a novel neutron imaging method, which is based on the effect that the spatial coherence of the neutron wave front can be changed through small-angle scattering of neutrons at...
Neutron Dark-Field Tomography (2008)
Strobl, M., Grünzweig, C., Hilger, A., Manke, I., Kardjilov, N., David, C., ...
Bulk magnetic domain structures visualized by neutron dark-field imaging (2008)
Grünzweig, C., David, C., Bunk, O., Dierolf, M., Frei, G., Kühne, G., ...
Jumelet, J., Bekki, S., David, C., Keckhut, P.
A method for estimating the stratospheric particle size distribution from multiwavelength lidar measurements is presented. It is based on matching measured and model-simulated backscatter...
Jumelet, J., Bekki, S., David, C., Keckhut, P.
A method for estimating the stratospheric particle size distribution from multiwavelength lidar measurements is presented. It is based on matching measured and model-simulated backscatter...
Herzen, J., Beckmann, F., Haibel, A., Schreyer, A., Pfeiffer, F., Donath, T., ...
No abstract
Colloidal monolayer trapped near a charged wall: A synchrotron x-ray diffraction study (2008)
Satapathy, D. K., Bunk, O., Jefimovs, K., Nygard, K., Guo, H., Diaz, A., ...
Region-of-interest tomography for grating-based x-ray differential phase-contrast imaging (2008)
Pfeiffer, F., David, C., Bunk, O., Donath, T., Bech, M., Le Duc, G., ...
Structure of confined fluids by x-ray interferometry using diffraction gratings (2008)
Nygard, K., Satapathy, D. K., Bunk, O., Diaz, A., Perret, E., Buitenhuis, J., ...
Concentration Profiles of Colloidal Fluids in One-Dimensional Confinement (2008)
Bunk, O., Satapathy, D. K., Pfeiffer, F., Diaz, A., David, C., Nygård, K., ...
Colloidal monolayer trapped near a charged wall: A synchrotron x-ray diffraction study (2008)
Satapathy, D.K., Bunk, O., Jefimovs, K., Nygård, K., Guo, H., Diaz, A., ...
Using x-ray diffraction from microfluidic channel arrays, we have determined concentration profiles of charge-stabilized silica colloids (radius 60±2 nm) confined between two like-charged dielectric...
J. Jumelet, S. Bekki, C. David, P. Keckhut
A method for estimating the stratospheric particle size distribution from multiwavelength lidar measurements is presented. It is based on matching measured and model-simulated backscatter...
J. Jumelet, S. Bekki, C. David, P. Keckhut
A method for estimating the stratospheric particle size distribution from multiwavelength lidar measurements is presented. It is based on matching measured and model-simulated backscatter...
Hard X-ray phase imaging and tomography using a grating interferometer. (2008)
David, C., Weitkamp, T., Pfeiffer, F., Diaz, A., Bruder, J., Rohbeck, T., ...
Spectrochimica Acta B, 62(2007) S.626-30
Zoneplates for hard X-rays with ultra-high diffraction efficiencies (2007)
Nöhammer, B., Hoszowska, J., Herzig, Hans-Peter, David, C.
We report on the fabrication and testing of linear multilevel zone plates made of silicon. The lenses were tilted with respect to the x-ray beam, enabling an increase of the effective height of the...
Zoneplates for hard X-rays with ultra-high diffraction efficiencies (2007)
Nöhammer, B., Hoszowska, J., Herzig, Hans-Peter, David, C.
We report on the fabrication and testing of linear multilevel zone plates made of silicon. The lenses were tilted with respect to the x-ray beam, enabling an increase of the effective height of the...
Participating researchers, students, and sta # include Prof. Steven D. Johnson, Prof. (2007)
David E. Winkel, Bhaskar Bose, Zheng Zhu, Kamlesh Rath, Esen Tuna, C. David, ...
The 2-year project investigates sequential decomposition: a process by which higher specifications of digital-system behavior are broken down into interacting sequential subsystems. We will develop a...
Microelectronic Engineering 57--58 (2001) 713--719 (2007)
Www Elsevier Com, C. David, D. Wiesmann, R. Germann, F. Horst, B. J. Offrein, ...
We report on the fabrication by electron-beam lithography of Bragg gratings, which serve as wavelength-selective elements of a Mach--Zehnder-type add-drop filter. To meet telecommunication network...
Physical properties and microstructures in core samples near the Chelungpu fault in Taiwan (2007)
David, C.; Univ. Cergy-Pontoise, France, Louis, L.; Univ. Cergy-Pontoise, France, Robion, P.; Univ. Cergy-Pontoise, France, Humbert, F.; Univ. Cergy-Pontoise, France, Wong, Teng-Fong; Stony Brook, USA, Chen, N. T.; Stony Brook, USA, ...
see Abstract Volume
Automated verification of shape and size properties via separation logic. (2007)
Nguyen, H. H., David, C., Qin, S.
Despite their popularity and importance, pointer-based programs remain a major challenge for program verification. In this paper, we propose an automated verification system that is concise, precise...
Pfeiffer, F., Bunk, O., David, C., Bech, M., Le Duc, G., Bravin, A., ...
Coherent X-ray scattering and lensless imaging at the European XFEL Facility (2007)
I.A. Vartanyants, I.K. Robinson, I. McNulty, C. David, P. Wochner, ...
Journal article
Coherent X-ray scattering and lensless imaging at the European XFEL Facility (2007)
Vartanyants, I. A., Robinson, I. K., McNulty, I., David, C., Wochner, P., Tschentscher, T.
Confinement-induced liquid ordering investigated by x-ray phase retrieval (2007)
Bunk, O., Diaz, A., Pfeiffer, F., David, C., Padeste, C., Keymeulen, H., ...
Using synchrotron x-ray diffraction, we have determined the ensemble-averaged density profile of colloidal fluids within confining channels of different widths. We observe an oscillatory...
Bunk, O., Diaz, A., Pfeiffer, F., David, C., Schmitt, B., Satapathy, D. K., ...
A technique has been developed that allows determination of the concentration profiles of colloidal solutions or any kind of fluid under confinement. Currently, submicrometre-wide channels are...
Fabrication of diffraction gratings for hard X-ray phase contrast imaging (2007)
David, C., Bruder, J., Rohbeck, T., Grunzweig, C., Kottler, C., Diaz, A., ...
We have developed a method for X-ray phase contrast imaging, which is based on a grating interferometer. The technique is capable of recording the phase shift of hard X-rays travelling through a...
Fabrication of Fresnel zone plates for hard X-rays (2007)
Jefimovs, K., Bunk, O., Pfeiffer, F., Grolimund, D., Van Der Veen, J. F., David, C.
A method to fabricate gold structures with high aspect ratio is presented. Fresnel zone plates with an outermost zone width of 100nm and structures of 1μm height are fabricated. Preliminary focusing...
Grating interferometer based scanning setup for hard x-ray phase contrast imaging (2007)
Kottler, C., Pfeiffer, F., Bunk, O., Grunzweig, C., David, C.
In x-ray radiography, particularly for technical and industrial applications, a scanning setup is very often favorable when compared to a direct two-dimensional image acquisition. Here, we report on...
Hard X-ray phase imaging and tomography using a grating interferometer (2007)
David, C., Weitkamp, T., Pfeiffer, F., Diaz, A., Bruder, J., Rohbeck, T., ...
An interferometric technique for hard X-rays is presented. It is based on two transmission gratings and a phase-stepping technique, and it provides separate radiographs of the phase and absorption...
Hard X-ray phase tomography with low-brilliance sources (2007)
Pfeiffer, F., Kottler, C., Bunk, O., David, C.
We report on a method for tomographic phase contrast imaging of centimeter sized objects. As opposed to existing techniques, our approach can be used with low-brilliance, lab based x-ray sources and...
Hard-x-ray lensless imaging of extended objects (2007)
Rodenburg, J. M., Hurst, A. C., Cullis, A. G., Dobson, B. R., Pfeiffer, F., Bunk, O., ...
We demonstrate a hard-x-ray microscope that does not use a lens and is not limited to a small field of view or an object of finite size. The method does not suffer any of the physical constraints,...
Engelhardt, M., Baumann, J., Schuster, M., Kottler, C., Pfeiffer, F., Bunk, O., ...
Differential x-ray phase contrast imaging using a grating interferometer was combined with a magnifying cone beam geometry using a conventional microfocus x-ray tube. This brings the advantages of a...
Keymeulen, H. R., Diaz, A., Solak, H. H., David, C., Pfeiffer, F., Patterson, B. D., ...
The glass transition temperature (Tg) of polymer nanostructures was measured using a technique based on synchrotron x-ray diffraction from periodic grating structures. Poly(methyl methacrylate)...
Phase contrast X-ray imaging of large samples using an incoherent laboratory source (2007)
Kottler, C., Pfeiffer, F., Bunk, O., Grünzweig, C., Bruder, J., Kaufmann, R., ...
An interferometric method to record quantitative X-ray phase contrast images has been developed that can be used at polychromatic and incoherent X-ray sources such as laboratory tubes. With respect...
Pfeiffer, F., Bunk, O., Kottler, C., David, C.
We report on a method for tomographic phase contrast imaging of centimeter sized objects. As opposed to existing techniques, our approach can be used with low-brilliance, lab based X-ray sources and...
Kottler, C., David, C., Pfeiffer, F., Bunk, O.
We report on a two-directional approach for grating based x-ray differential phase contrast imaging. In order to retrieve good quality and artifact-free phase images for quantitative analysis and...
Legrand, Denis, Delouis, B., Dorbath, L., David, C., Campos, J., Marquez, L., ...
Publicación ISI
Confinement-induced liquid ordering investigated by x-ray phase retrieval (2007)
Bunk, O., Diaz, A., Pfeiffer, F., David, C., Padeste, C., Keymeulen, H., ...
Phase contrast X-ray imaging of large samples using an incoherent laboratory source. (2007)
Kottler, C., Pfeiffer, F., Bunk, O., Grünzweig, C., Bruder, J., Kaufmann, R., ...
physica status solidi (a), 204(2007) S.2728-33
Phase contrast X-ray imaging of large samples using an incoherent laboratory source. (2007)
Kottler, C., Pfeiffer, F., Bunk, O., Grünzweig, C., Bruder, J., Kaufmann, R., ...
8th Biennial Conference on High Resolution X-ray Diffraction and Imaging (XTOP 2006), Baden-Baden, September 19-22, 2006
Observation of polar stratospheric clouds down to the mediterranean coast. (2007)
Keckhut, P., David, C., Marchand, M., Bekki, S., Jumelet, J., Hauchecorne, A., ...
Atmospheric Chemistry and Physics, 7(2007) S.5275-81
Tomography with grating interferometers at low-brilliance sources. (2007)
Weitkamp, R., David, C., Kottler, C., Bunk, O., Pfeiffer, F.
Bonse, U. [Hrsg.]
Quantitative phase imaging and tomography with polychromatic X-rays. (2007)
David, C., Weitkamp, T., Khan, T., Pfeiffer, F., Bunk, O., Diaz, A., ...
Proc.of the 8th Internat.Conf.on X-Ray Microscopy, Himeji, J, July 16-30, 2005
Creation of multi-scale stripe-like patterns in thin polymer blend films (2006)
Müller-Buschbaum, P., Bauer, E., Pfister, S., Roth, S.V., Burghammer, M., Riekel, C., ...
Growth cone navigation in substrate-bound ephrin gradients. (2006)
Von Philipsborn, Anke, Lang, Susanne, Löschinger, Jürgen, Bernard, A., David, C., Lehnert, D., ...
Graded distributions of ephrin ligands are involved in the formation of topographic maps. However, it is still poorly understood how growth cones read gradients of membrane-bound guidance molecules....
Neutron phase imaging and tomography (2006)
Pfeiffer, F., Grunzweig, C., Bunk, O., Frei, G., Lehmann, E., David, C.
Pfeiffer, F., David, C., Van Der Veen, J. F., Bergemann, C.
The x-ray focusing properties of linear Fresnel zone plates have been derived by solving the Helmholtz equation for the field propagating through the zones. We consider the imaging of a point object...
Phase retrieval and differential phase-contrast imaging with low-brilliance X-ray sources (2006)
Pfeiffer, F., Weitkamp, T., Bunk, O., David, C.
X-ray radiographic absorption imaging is an invaluable tool in medical diagnostics and materials science. For biological tissue samples, polymers or fibre composites, however, the use of conventional...
Backes, D., Heyderman, L. J., David, C., Schaeublin, R., Klaui, M., Ehrke, H., ...
We have fabricated curved-line ferromagnetic nanostructures on membranes for transmission electron microscopy investigations of the equilibrium magnetic spin configurations. The magnetic elements...
Adapting precision farming principles to organic crop production (2006)
Precision farming is a discipline that aims to increase efficiency in the management of agriculture throughout new technologies. Organic crop production systems in the future need to combine...
Phase retrieval and differential phase-contrast imaging with low-brilliance X-ray sources. (2006)
Pfeiffer, F., Weitkamp, T., Bunk, O., David, C.
Nature Physics, 2(2006) S.258-61
Phase retrieval and differential phase contrast imaging with hard X-rays and cold neutrons. (2006)
David, C., Pfeiffer, F., Kottler, C., Grünzweig, C., Bunk, O., Stampanoni, M., ...
8th Bienneal Conf.on High Resolution X-Ray Diffraction and Imaging (XTOP 2006), Baden-Baden, September 19-22, 2006
Coherence requirements in hard X-ray grating interferometry. (2006)
Weitkamp, T., Kottler, C., Bunk, O., Pfeiffer, F., David, C.
8th Bienneal Conf.on High Resolution X-Ray Diffraction and Imaging (XTOP 2006), Baden-Baden, September 19-22, 2006
X-ray phase contrast imaging using a grating interferometer. (2006)
Pfeiffer, F., Weitkamp, T., David, C.
Europhysics News, 37(2006) Nr.5, S.13-15
Shearing interferometer for quantifying the coherence of hard X-ray beams (2005)
Pfeiffer, F., Bunk, O., Schulze-Briese, C., Diaz, A., Weitkamp, T., David, C., ...
We report a quantitative measurement of the full transverse coherence function of the 14.4 keV x-ray radiation produced by an undulator at the Swiss Light Source. An x-ray grating interferometer...
Diaz, A., David, C., Guo, H., Keymeulen, H., Pfeiffer, F., Wegdam, G., ...
We present a way to fabricate high-aspect-ratio silicon microcavity arrays which can be used for the investigation of confinement-induced ordering phenomena within colloid solutions. In these...
Shearing interferometer for quantifying the coherence of hard x-ray beams (2005)
Pfeiffer, F., Bunk, O., Schulze-Briese, C., Diaz, A., Weitkamp, T., David, C., ...
We report a quantitative measurement of the full transverse coherence function of the 14.4 keV x-ray radiation produced by an undulator at the Swiss Light Source. An x-ray grating interferometer...
X-ray beam-position monitoring in the sub-micrometre and sub-second regime (2005)
Bunk, O., Pfeiffer, F., Stampanoni, M., Patterson, B. D., Schulze-Briese, C., David, C.
It is demonstrated that X-ray beam positions can be extracted from two-dimensional profiles with sub-pixel resolution. Beam-position measurements utilizing a self-designed low-cost two-dimensional...
X-ray phase imaging with a grating interferometer (2005)
Weitkamp, T., Diaz, A., David, C., Pfeiffer, F., Stampanoni, M., Cloetens, P., ...
Using a high-efficiency grating interferometer for hard X rays (10-30 keV) and a phase-stepping technique, separate radiographs of the phase and absorption profiles of bulk samples can be obtained...
Fabrication of magnetic ring structures for Lorentz electron microscopy (2005)
Heyderman, L., Klaui, M., Schaeublin, R., Rudiger, U., Vaz, C. A. F., Bland, J. A. C., ...
We have fabricated three-quarter ring structures on silicon nitride membranes for magnetic domain imaging using Lorentz electron microscopy. The ring structures have linewidths of 100, 250, 350 and...
Indications of thin cirrus clouds in the stratosphere at mid-latitudes (2005)
Keckhut, P., Hauchecorne, A., Bekki, S., Colette, A., David, C., Jumelet, J.
This study is devoted to the possible presence of cirrus clouds in the stratosphere. Three months of lidar data collected in the south of France (44° N) for detection of stratospheric cirrus are...
Evidences of thin cirrus clouds in the stratosphere at mid-latitudes (2005)
Keckhut, P., Hauchecorne, A., Bekki, S., Colette, A., David, C., Jumelet, J.
This study is devoted to the possible presence of cirrus clouds in the stratosphere. Three months of lidar data collected in the south of France (44° N) for detection of stratospheric cirrus are...
Indications of thin cirrus clouds in the stratosphere at mid-latitudes (2005)
Keckhut, P., Hauchecorne, A., Bekki, S., Colette, A., David, C., Jumelet, J.
This study is devoted to the possible presence of cirrus clouds in the stratosphere. Three months of lidar data collected in the south of France (44° N) for detection of stratospheric cirrus are...
Evidences of thin cirrus clouds in the stratosphere at mid-latitudes (2005)
Keckhut, P., Hauchecorne, A., Bekki, S., Colette, A., David, C., Jumelet, J.
This study is devoted to the possible presence of cirrus clouds in the stratosphere. Three months of lidar data collected in the south of France (44° N) for detection of stratospheric cirrus are...
Evidences of thin cirrus clouds in the stratosphere at mid-latitudes (2005)
P. Keckhut, A. Hauchecorne, S. Bekki, A. Colette, C. David, J. Jumelet
This study is devoted to the possible presence of cirrus clouds in the stratosphere. Three months of lidar data collected in the south of France (44° N) for detection of stratospheric cirrus are...
Nitrogen management of organic winter wheat Decision-making through model-based explorations (2005)
David, C., Jeuffroy, M.H., Meynard, J.M.
In organic wheat, nitrogen is one of the key limiting factors responsible for irregular productivity and low quality (David et al, 2005b), 5 to 50 % less than conventionally managed crops (Nieberg...
Sylvander, Bertil, Schieb-Bienfait, Nathalie, Roque, Olivier, Neyrat, S., David, C.
La remise en cause du modèle fordiste de l’agriculture européenne, fondée sur une contestation sociale de ses excès et de ses dérives, a conduit au cours des années 1980-90 à une...
Crustal seismicity and active tectonics in the Arica bend forearc (2005)
David, C., Audin, Laurence, Comte, D., Tavera, H., Hérail, Gérard
1D and 2D X-ray waveguides: Optics and applications (2003)
Pfeiffer, F., David, C., Salditt, T.
X-ray waveguides offer a novel approach for nanobeam production, which may become useful in coherent beam imaging and phase contrast projection microscopy. Internal field enhancement, coherency...
E. Kehris, D. Paschaloudis, C. David, G. Fragidis
The design of a web-based general-purpose software system, named LabAssistant, that supports computer-based laboratory sessions is presented. The aim of LabAssistant is to provide support to the...
Reflection of waveguided X-rays in two-dimensional nanostructures (2002)
Pfeiffer, F., Salditt, T., David, C.
The internal reflection of an excited X-ray waveguide mode in a synthetic nanostructure, defined by electron-beam lithography, has been measured. In this device, the X-ray beam is first coupled into...
Two-dimensional x-ray waveguides and point sources (2002)
Pfeiffer, F., David, C., Burghammer, M., Riekel, C., Salditt, T.
We show that resonant coupling of synchrotron beams into suitable nanostructures can be used for the generation of coherent x-ray point sources. A two-dimensionally confining x-ray waveguide...
A new technique for fabricating three-dimensional micro- and nanostructures of various shapes (2001)
Prinz, V Ya, Grutzmacher, D, Beyer, A, David, C, Ketterer, B, Deckardt, E
In this paper we show that complex three-dimensional micro- and nanostructure shells can be formed by directional rolling up of thin strained Si/SiGe heterostructures. By lifting strain-designed...
Single hole transistor in a p-Si/SiGe quantum well (2000)
Doetsch, U., Gennser, U., Heinzel, T., Luescher, S., David, C., Dehlinger, G., ...
A single hole transistor is patterned in a p-Si/SiGe quantum well by applying voltages to nanostructured top gate electrodes. Gating is achieved by oxidizing the etched semiconductor surface and the...
Apodized surface-corrugated gratings with varying duty cycles (2000)
D. Wiesmann, C. David, R. Germann, D. Erni, G. L. Bona
Abstract—We present the first realization of a Bragg grating apodization based on a concatenation of different duty cycles. The gratings were fabricated in SiON planar waveguides. The reflected...
The thermal behavior of poly(hexamethylene terephthalate) (PHT) oligomers containing variable amounts of isophthalic (IPA) monomer has been investigated. Poly(hexamethylene terephthalate...
Cooperative Evaporation in Ordered Arrays of Volatile Droplets (1999)
Schäfle, Claudia, Bechinger, Clemens, Rinn, Bernd, David, C., Leiderer, Paul
We study the evaporation behaviour of regular arrays of volatile droplets on a solid substrate. We observe that under certain conditions the droplets do not evaporate independently of each other but...
On the flow of kaons produced in relativistic heavy ion collisions (1998)
David, C., Hartnack, C., Aichelin, J.
We investigate the different contributions to the in-plane flow of K+ mesons observed recently by the FOPI collaboration in the reaction Ni(1.93 AGeV)+Ni. Due to the kinematics of the three body...
Measurement of the electron temperature gradient in a solar coronal hole. (1998)
David, C., Gabriel, A. H., Bely-Dubau, F., Fludra, A., Lemaire, P., Wilhelm, K.
A Learnability Model for Universal Representations (1997)
Stephen Muggleton, C. David Page, Stephen Muggleton, C. David, C. David
This paper defines a new computational model of inductive learning, called U-learnability (Universal Learnability), that is well-suited for rich representation languages, most notably for universal...
NDSC Intercomparison of Stratospheric Aerosol Processing Algorithms (1996)
Steinbrecht, W.; DWD, Hienpeissenberg, Germany, Jager, H.; IFU, Garmish-Partenkirchen, Germany, Adriani, A.;, Di Donfrancesco, G.;, Barnes, J.;, Beyerle, G.;, ...
Scattering ratios R processed from the same raw data at 353 and 532 nm by different lidar groups agree within about 10 % for high and within about 4 % for low aerosol loading. In the main layer...
Polynomial Learnability and Inductive Logic Programming: Methods and Results (1995)
Over the last few years, the efficient learnability of logic programs has been studied extensively. Positive and negative learnability results now exist for a number of restricted classes of logic...
Building theories into instantiation (1995)
Instantiation orderings over formulas (the relation of one formula bemg an instance of another) have long been central to the study of automated deduction and logic programming, and are of...
Guizard, C., Bertrand, D., David, C., Mekikdjian, C.
This symposium is the occasion to inform on the use of artificial vision in agriculture through examples of research projects conducted by the Cemagref and the INRA, particularly on production,...
Generalization and Learnability: A Study of Constrained Atoms (1992)
C. David Page, Stephen H. (ed, C. David, Alan M. Frisch
This paper studies the generalization of atomic formulas, or atoms, that are augmented with constraints on or among their terms. The atoms may also be viewed as definite clauses whose antecedents...
Geometry of subduction and depth of the seismogenic zone in the Guerrero gap, Mexico (1990)
Suarez, G., Monfret, Tony, Wittlinger, G., David, C.
L'étude sismique de la zone côtière de Guerrero (Mexique) permet d'interpréter la géométrie de la subduction dans cette région
Acta Crystallographica Section, Er J. Blake, C. David, Josephine M. Tunney, Ng Rd England, Key Indicators
separated by hydrophobic regions containing the tetraphenylphosphonium cations. Within each chain, the chloride anions are bridged by pairs of water molecules, each water molecule contributing two...
The study of the spectral distribution and intensity of the fluorescence of binary mesomorphic mixtures as a function of the temperature is presented as a convenient method for obtaining phase...
The study of the spectral distribution and intensity of the fluorescence of binary mesomorphic mixtures as a function of the temperature is presented as a convenient method for obtaining phase...
Sampling Survey on Brucellosis among Farmers and their Families in Ille-et-Vilaine (Brittany) (1977)
ZOURBAS, J, MASSÉ, L, ROUSSEY, A, DAVID, C, MAURIN, J, TORTE, J
A three-stage sampling survey among farmers and their families living on farms in the department of Ille-et-Vilaine gave the following results: Among 490 persons examined 313 (64 per cent) showed a...
Rural campaign to diagnose and treat mucocutaneous leishmaniasis in Bolivia.
Dedet, J. P., Melogno, R., Cardenas, F., Valda, L., David, C., Fernandez, V., ...
Mucocutaneous leishmaniasis (MCL) is endemic in the tropical Amazonian lowlands of Bolivia, an area that regularly receives influxes of migratory populations. In these new agricultural development...