Reductive immobilization of U (VI) in Fe (III) oxide-reducing subsurface sediments: Analysis of coupled microbial-geochemical processes in experimental reactive …
... B. Selman, HJ Levesque On the hardness of approximate reasoning D. Roth Stochastic modeling o... more ... B. Selman, HJ Levesque On the hardness of approximate reasoning D. Roth Stochastic modeling of genetic algorithms D. Reynolds, J. Gomatam A new ... L(0) - the first 5 years of an automated language-acquisition project J. Feldman, G. Lakoff, D. Bailey, S. Narayanan, T. Regier ...
Published Ahead-of-Print-Last Updated: October 19, 2012
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... Abstract: Go to Full Text of this Article. Pretargeted gamma imaging of murine metastatic mel... more ... Abstract: Go to Full Text of this Article. Pretargeted gamma imaging of murine metastatic melanoma lung lesions with bispecific antibody and radiolabeled polymer drug conjugates. Gada, Keyur S.; Patil, Vishwesh; Panwar, Rajiv; Majewski, Stan; Tekabe, Yared; Khaw, Ban-An. ...
Spectropolarimeter for planetary exploration (SPEX): performance measurements with a prototype
… of SPIE Vol, 2011
SPEX (Spectropolarimeter for Planetary Exploration) was developed in close cooperation between sc... more SPEX (Spectropolarimeter for Planetary Exploration) was developed in close cooperation between scientific institutes and space technological industries in the Netherlands. It is used for measuring microphysical properties of aerosols and cloud particles in planetary atmospheres. SPEX utilizes a number of novel ideas. The key feature is that full linear spectropolarimetry can be performed without the use of moving parts, using
Prototyping for the Spectropolarimeter for Planetary EXploration (SPEX): calibration and sky measurements
SPIE Optical …, 2011
We present the Spectropolarimeter for Planetary EXploration (SPEX), a high-accuracy linear spectr... more We present the Spectropolarimeter for Planetary EXploration (SPEX), a high-accuracy linear spectropolarimeter measuring from 400 to 800 nm (with 2 nm intensity resolution), that is compact (~ 1 liter), robust and lightweight. This is achieved by employing the unconventional spectral polarization modulation technique, optimized for linear polarimetry. The polarization modulator consists of an achromatic quarter-wave retarder and a multiple-order retarder,
We present SPEX, the Spectropolarimeter for Planetary Exploration, which is a compact, robust and... more We present SPEX, the Spectropolarimeter for Planetary Exploration, which is a compact, robust and low-mass spectropolarimeter designed to operate from an orbiting or in situ platform. Its purpose is to simultaneously measure the radiance and the state (degree and angle) of linear polarization of sunlight that has been scattered in a planetary atmosphere and/or reflected by a planetary surface with high accuracy. The degree of linear polarization is extremely sensitive to the microphysical properties of atmospheric or surface particles (such as size, shape, and composition), and to the vertical distribution of atmospheric particles, such as cloud top altitudes. Measurements as those performed by SPEX are therefore crucial and often the only tool for disentangling the many parameters that describe planetary atmospheres and surfaces. SPEX uses a novel, passive method for its radiance and polarization observations that is based on a carefully selected combination of polarization optics. This method, called spectral modulation, is the modulation of the radiance spectrum in both amplitude and phase by the degree and angle of linear polarization, respectively. The polarization optics consists of an achromatic quarter-wave retarder, an athermal multiple-order retarder, and a polarizing beam splitter. We will show first results obtained with the recently developed prototype of the SPEX instrument, and present a performance analysis based on a dedicated vector radiative transport model together with a recently developed SPEX instrument simulator.
This paper presents an overview of the reflect project. It defines the notion of knowledge level ... more This paper presents an overview of the reflect project. It defines the notion of knowledge level reflection that has been central to the project, it compares this notion with existing approaches to reflection in related fields, and investigates some of the consequences of the concept of knowledge level reflection: what is a general architecture for knowledge level reflection, how to model the object component in such an architecture, what is the nature of reflective theories, how can we design such architectures, and what are the results of our actual experiments with such systems?
In this paper we develop a conceptual modelling framework for knowledge-level reflection (KLR), i... more In this paper we develop a conceptual modelling framework for knowledge-level reflection (KLR), i.e, the modelling of tasks that require a self-representation of a knowledge system's own object-level problem solving tasks. This framework builds upon the KADS methodology for knowledge acquisition and design of knowledge systems .
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Papers by Erick Wielinga