Modern temporal network theory: A colloquium

The power of any kind of network approach lies in the ability to simplify a complex system so that one can better understand its function as a whole. Sometimes it is beneficial, however, to include more information than in a simple graph of only nodes and links. Adding information about times of interactions can make predictions and mechanistic understanding more accurate. The drawback, however, is that there are not so many methods available, partly because temporal networks is a relatively young field, partly because it more difficult to develop such methods compared to for static networks. In this colloquium, we review the methods to analyze and model temporal networks and processes taking place on them, focusing mainly on the last three years. This includes the spreading of infectious disease, opinions, rumors, in social networks; information packets in computer networks; various types of signaling in biology, and more. We also discuss future directions.Comment: Final accepted versio

Polyimide Bonded Magnets: Processing and Properties

We report a new method of polyimide synthesis based on the interaction of dianhydrides with acylated diamines; for preparing a melt processable mixture of prepolymer and rare earth magnetic alloy particles in the form of 75-100 mum particles. This mixture can be easily converted to useful thermoplastic polyimide bonded magnets by heating at 300degreesC. It is shown that the prepolymer based on 1,3-bis(3,4-dicarboxyphenoxy)benzene dianhydride and the diacetyl derivative of 2,2-bis(4-(4-aminophenoxy)phenyl)sulfone diamine after removing less than 5% by weight of the volatile components can be melted at 220-240degreesC to give a fluid with a viscosity of 10-20 Pas. This low viscosity of the prepolymer facilitates blending it with magnetic particles at relatively high volume fractions (up to 85 vol %) that are not possible using conventional methods. The resulting polyimide-bonded magnets exhibit excellent thermal stability and a high storage modulus of 10 GPa at 400degreesC. Magnetic property measurements showed a greater than or equal to10% increase in energy products over that of typical commercial bonded magnet materials such as the ones containing thermoplastic poly(phenylene sulfide) or polyamide matrices. (C) 2003 Wiley Periodicals, Inc

Simulation of 235U and 239Pu decay heat using selected beta decay data in the framework of reactor antineutrino experiments

International audiencePrecise knowledge of beta decay properties of 235U and 239Pu fission products is extremely important to calculate the energy realized in a reactor core after the fission process ends. The estimation of this decay heat is a major safety concern in reactor technology. The beta decay data were selected among different evaluated nuclear databases combined to experimental data (ENSDF, Total Absorption Spectroscopy measurements, Rudstam et al.' measurements, JENDL Gross Theory spectra...) in order to better reproduce antineutrino emission spectra after such fissions. Taking advantage of the studies of the different available nuclear databases containing beta decay properties of the fission products performed in the framework of the Double Chooz experiment, a new simulation of the decay heat released after the fission of 235U and 239Pu will be performed using the individual contributions of the fission products. Our study allowed us to select a list of fission product nuclei needing extra measurements of decay properties to better reconstruct the emitted antineutrino spectrum. We will present, among these nuclei, the ones which are interesting for the decay heat calculation and how we intent to better measure their decay properties. The measurements of a first group of nuclei by using the TAGS technique have been accepted by the JYFL (Jyvaskyla-Finland) and will be performed in collaboration with the already existing TAGS collaboration lead by the Valencia team (Spain, J.L. Tain, A. Algora et al)

Simulation of 235U and 239Pu decay heat using selected beta decay data in the framework of reactor antineutrino experiments

International audiencePrecise knowledge of beta decay properties of 235U and 239Pu fission products is extremely important to calculate the energy realized in a reactor core after the fission process ends. The estimation of this decay heat is a major safety concern in reactor technology. The beta decay data were selected among different evaluated nuclear databases combined to experimental data (ENSDF, Total Absorption Spectroscopy measurements, Rudstam et al.' measurements, JENDL Gross Theory spectra...) in order to better reproduce antineutrino emission spectra after such fissions. Taking advantage of the studies of the different available nuclear databases containing beta decay properties of the fission products performed in the framework of the Double Chooz experiment, a new simulation of the decay heat released after the fission of 235U and 239Pu will be performed using the individual contributions of the fission products. Our study allowed us to select a list of fission product nuclei needing extra measurements of decay properties to better reconstruct the emitted antineutrino spectrum. We will present, among these nuclei, the ones which are interesting for the decay heat calculation and how we intent to better measure their decay properties. The measurements of a first group of nuclei by using the TAGS technique have been accepted by the JYFL (Jyvaskyla-Finland) and will be performed in collaboration with the already existing TAGS collaboration lead by the Valencia team (Spain, J.L. Tain, A. Algora et al)

Simulation of 235U and 239Pu decay heat using selected beta decay data in the framework of reactor antineutrino experiments

International audiencePrecise knowledge of beta decay properties of 235U and 239Pu fission products is extremely important to calculate the energy realized in a reactor core after the fission process ends. The estimation of this decay heat is a major safety concern in reactor technology. The beta decay data were selected among different evaluated nuclear databases combined to experimental data (ENSDF, Total Absorption Spectroscopy measurements, Rudstam et al.' measurements, JENDL Gross Theory spectra...) in order to better reproduce antineutrino emission spectra after such fissions. Taking advantage of the studies of the different available nuclear databases containing beta decay properties of the fission products performed in the framework of the Double Chooz experiment, a new simulation of the decay heat released after the fission of 235U and 239Pu will be performed using the individual contributions of the fission products. Our study allowed us to select a list of fission product nuclei needing extra measurements of decay properties to better reconstruct the emitted antineutrino spectrum. We will present, among these nuclei, the ones which are interesting for the decay heat calculation and how we intent to better measure their decay properties. The measurements of a first group of nuclei by using the TAGS technique have been accepted by the JYFL (Jyvaskyla-Finland) and will be performed in collaboration with the already existing TAGS collaboration lead by the Valencia team (Spain, J.L. Tain, A. Algora et al)

Simulation of 235U and 239Pu decay heat using selected beta decay data in the framework of reactor antineutrino experiments

International audiencePrecise knowledge of beta decay properties of 235U and 239Pu fission products is extremely important to calculate the energy realized in a reactor core after the fission process ends. The estimation of this decay heat is a major safety concern in reactor technology. The beta decay data were selected among different evaluated nuclear databases combined to experimental data (ENSDF, Total Absorption Spectroscopy measurements, Rudstam et al.' measurements, JENDL Gross Theory spectra...) in order to better reproduce antineutrino emission spectra after such fissions. Taking advantage of the studies of the different available nuclear databases containing beta decay properties of the fission products performed in the framework of the Double Chooz experiment, a new simulation of the decay heat released after the fission of 235U and 239Pu will be performed using the individual contributions of the fission products. Our study allowed us to select a list of fission product nuclei needing extra measurements of decay properties to better reconstruct the emitted antineutrino spectrum. We will present, among these nuclei, the ones which are interesting for the decay heat calculation and how we intent to better measure their decay properties. The measurements of a first group of nuclei by using the TAGS technique have been accepted by the JYFL (Jyvaskyla-Finland) and will be performed in collaboration with the already existing TAGS collaboration lead by the Valencia team (Spain, J.L. Tain, A. Algora et al)

Reactor Simulations for Unveiling Diversion Scenarios : capabilities of the antineutrino probe

International audienc

Reactor Simulations for Unveiling Diversion Scenarios : capabilities of the antineutrino probe

International audienc