Project acronym ACTIVENP
Project Active and low loss nano photonics (ActiveNP)
Researcher (PI) Thomas Arno Klar
Host Institution (HI) UNIVERSITAT LINZ
Call Details Starting Grant (StG), PE3, ERC-2010-StG_20091028
Summary This project aims at designing novel hybrid nanophotonic devices comprising metallic nanostructures and active elements such as dye molecules or colloidal quantum dots. Three core objectives, each going far beyond the state of the art, shall be tackled: (i) Metamaterials containing gain materials: Metamaterials introduce magnetism to the optical frequency range and hold promise to create entirely novel devices for light manipulation. Since present day metamaterials are extremely absorptive, it is of utmost importance to fight losses. The ground-breaking approach of this proposal is to incorporate fluorescing species into the nanoscale metallic metastructures in order to compensate losses by stimulated emission. (ii) The second objective exceeds the ansatz of compensating losses and will reach out for lasing action. Individual metallic nanostructures such as pairs of nanoparticles will form novel and unusual nanometre sized resonators for laser action. State of the art microresonators still have a volume of at least half of the wavelength cubed. Noble metal nanoparticle resonators scale down this volume by a factor of thousand allowing for truly nanoscale coherent light sources. (iii) A third objective concerns a substantial improvement of nonlinear effects. This will be accomplished by drastically sharpened resonances of nanoplasmonic devices surrounded by active gain materials. An interdisciplinary team of PhD students and a PostDoc will be assembled, each scientist being uniquely qualified to cover one of the expertise fields: Design, spectroscopy, and simulation. The project s outcome is twofold: A substantial expansion of fundamental understanding of nanophotonics and practical devices such as nanoscopic lasers and low loss metamaterials.
Summary
This project aims at designing novel hybrid nanophotonic devices comprising metallic nanostructures and active elements such as dye molecules or colloidal quantum dots. Three core objectives, each going far beyond the state of the art, shall be tackled: (i) Metamaterials containing gain materials: Metamaterials introduce magnetism to the optical frequency range and hold promise to create entirely novel devices for light manipulation. Since present day metamaterials are extremely absorptive, it is of utmost importance to fight losses. The ground-breaking approach of this proposal is to incorporate fluorescing species into the nanoscale metallic metastructures in order to compensate losses by stimulated emission. (ii) The second objective exceeds the ansatz of compensating losses and will reach out for lasing action. Individual metallic nanostructures such as pairs of nanoparticles will form novel and unusual nanometre sized resonators for laser action. State of the art microresonators still have a volume of at least half of the wavelength cubed. Noble metal nanoparticle resonators scale down this volume by a factor of thousand allowing for truly nanoscale coherent light sources. (iii) A third objective concerns a substantial improvement of nonlinear effects. This will be accomplished by drastically sharpened resonances of nanoplasmonic devices surrounded by active gain materials. An interdisciplinary team of PhD students and a PostDoc will be assembled, each scientist being uniquely qualified to cover one of the expertise fields: Design, spectroscopy, and simulation. The project s outcome is twofold: A substantial expansion of fundamental understanding of nanophotonics and practical devices such as nanoscopic lasers and low loss metamaterials.
Max ERC Funding
1 494 756 €
Duration
Start date: 2010-10-01, End date: 2015-09-30
Project acronym ANALYTIC
Project ANALYTIC PROPERTIES OF INFINITE GROUPS:
limits, curvature, and randomness
Researcher (PI) Gulnara Arzhantseva
Host Institution (HI) UNIVERSITAT WIEN
Call Details Starting Grant (StG), PE1, ERC-2010-StG_20091028
Summary The overall goal of this project is to develop new concepts and techniques in geometric and asymptotic group theory for a systematic study of the analytic properties of discrete groups. These are properties depending on the unitary representation theory of the group. The fundamental examples are amenability, discovered by von Neumann in 1929, and property (T), introduced by Kazhdan in 1967.
My main objective is to establish the precise relations between groups recently appeared in K-theory and topology such as C*-exact groups and groups coarsely embeddable into a Hilbert space, versus those discovered in ergodic theory and operator algebra, for example, sofic and hyperlinear groups. This is a first ever attempt to confront the analytic behavior of so different nature. I plan to work on crucial open questions: Is every coarsely embeddable group C*-exact? Is every group sofic? Is every hyperlinear group sofic?
My motivation is two-fold:
- Many outstanding conjectures were recently solved for these groups, e.g. the Novikov conjecture (1965) for coarsely embeddable groups by Yu in 2000 and the Gottschalk surjunctivity conjecture (1973) for sofic groups by Gromov in 1999. However, their group-theoretical structure remains mysterious.
- In recent years, geometric group theory has undergone significant changes, mainly due to the growing impact of this theory on other branches of mathematics. However, the interplay between geometric, asymptotic, and analytic group properties has not yet been fully understood.
The main innovative contribution of this proposal lies in the interaction between 3 axes: (i) limits of groups, in the space of marked groups or metric ultralimits; (ii) analytic properties of groups with curvature, of lacunary or relatively hyperbolic groups; (iii) random groups, in a topological or statistical meaning. As a result, I will describe the above apparently unrelated classes of groups in a unified way and will detail their algebraic behavior.
Summary
The overall goal of this project is to develop new concepts and techniques in geometric and asymptotic group theory for a systematic study of the analytic properties of discrete groups. These are properties depending on the unitary representation theory of the group. The fundamental examples are amenability, discovered by von Neumann in 1929, and property (T), introduced by Kazhdan in 1967.
My main objective is to establish the precise relations between groups recently appeared in K-theory and topology such as C*-exact groups and groups coarsely embeddable into a Hilbert space, versus those discovered in ergodic theory and operator algebra, for example, sofic and hyperlinear groups. This is a first ever attempt to confront the analytic behavior of so different nature. I plan to work on crucial open questions: Is every coarsely embeddable group C*-exact? Is every group sofic? Is every hyperlinear group sofic?
My motivation is two-fold:
- Many outstanding conjectures were recently solved for these groups, e.g. the Novikov conjecture (1965) for coarsely embeddable groups by Yu in 2000 and the Gottschalk surjunctivity conjecture (1973) for sofic groups by Gromov in 1999. However, their group-theoretical structure remains mysterious.
- In recent years, geometric group theory has undergone significant changes, mainly due to the growing impact of this theory on other branches of mathematics. However, the interplay between geometric, asymptotic, and analytic group properties has not yet been fully understood.
The main innovative contribution of this proposal lies in the interaction between 3 axes: (i) limits of groups, in the space of marked groups or metric ultralimits; (ii) analytic properties of groups with curvature, of lacunary or relatively hyperbolic groups; (iii) random groups, in a topological or statistical meaning. As a result, I will describe the above apparently unrelated classes of groups in a unified way and will detail their algebraic behavior.
Max ERC Funding
1 065 500 €
Duration
Start date: 2011-04-01, End date: 2016-03-31
Project acronym HEMOX
Project The male-female health-mortality paradox
Researcher (PI) Marc Luy
Host Institution (HI) OESTERREICHISCHE AKADEMIE DER WISSENSCHAFTEN
Call Details Starting Grant (StG), SH3, ERC-2010-StG_20091209
Summary "From the 1960s to the 1980s a common wisdom about differences between males and females in health and mortality emerged which was summarised by the well-known phrase ""women are sicker, but men die quicker"". Recently this wisdom has been increasingly questioned. Nevertheless, the general idea of a paradoxical relationship between health and mortality among women and men persists until today. The purpose of this project is to decisively advance the understanding of the paradox by demonstrating that the reverse relationship between sex on the one side and health and mortality on the other is not as paradoxical as it seems. We hypothesise that two factors are mainly responsible for causing this intuitive contradiction. First, the overall reversal in sex morbidity and sex mortality differentials occurs because conditions that figure importantly in morbidity are not very important in mortality, and vice versa. Second, it is very likely that longevity is directly related to the absolute number of life years in ill health. Thus, women show higher morbidity rates not because they are female but because they are the sex with higher life expectancy. We will test these hypotheses in a ""natural experiment"" by analysing the relationship between health and mortality among Catholic nuns and monks from Austria and Germany in comparison to women and men of the general population. Cloister studies have a long scientific tradition and provided path-breaking knowledge for human medicine and demography, including the applicant s research during the last decade. This project follows the line of this tradition and will investigate the male-female health-mortality paradox in a longitudinal setting that is as close as one can get to an ideal long-term experiment in humans."
Summary
"From the 1960s to the 1980s a common wisdom about differences between males and females in health and mortality emerged which was summarised by the well-known phrase ""women are sicker, but men die quicker"". Recently this wisdom has been increasingly questioned. Nevertheless, the general idea of a paradoxical relationship between health and mortality among women and men persists until today. The purpose of this project is to decisively advance the understanding of the paradox by demonstrating that the reverse relationship between sex on the one side and health and mortality on the other is not as paradoxical as it seems. We hypothesise that two factors are mainly responsible for causing this intuitive contradiction. First, the overall reversal in sex morbidity and sex mortality differentials occurs because conditions that figure importantly in morbidity are not very important in mortality, and vice versa. Second, it is very likely that longevity is directly related to the absolute number of life years in ill health. Thus, women show higher morbidity rates not because they are female but because they are the sex with higher life expectancy. We will test these hypotheses in a ""natural experiment"" by analysing the relationship between health and mortality among Catholic nuns and monks from Austria and Germany in comparison to women and men of the general population. Cloister studies have a long scientific tradition and provided path-breaking knowledge for human medicine and demography, including the applicant s research during the last decade. This project follows the line of this tradition and will investigate the male-female health-mortality paradox in a longitudinal setting that is as close as one can get to an ideal long-term experiment in humans."
Max ERC Funding
999 999 €
Duration
Start date: 2011-04-01, End date: 2016-09-30
Project acronym LUISE
Project An integrated socioecological approach to land-use intensity: Analyzing and mapping biophysical stocks/flows and their socioeconomic drivers
Researcher (PI) Karlheinz Erb
Host Institution (HI) UNIVERSITAET KLAGENFURT
Call Details Starting Grant (StG), SH3, ERC-2010-StG_20091209
Summary Land-use intensity is an essential aspect of the human use of terrestrial ecosystems. In the course of history, intensification of land use allowed to overcome Malthusian traps and supported population growth and im-proved diets. It can be anticipated that intensification will become even more decisive in the future, in the light of a growing world population, surges in biofuel consumption, and the simultaneous mandate to protect the world’s forests. Despite its importance, there is a lack of comprehensive, consistent, systematic, and spa-tially explicit metrics of land-use intensity. In consequence, the causal understanding of the factors, mecha-nisms, determinants and constraints underlying land intensification is unsatisfactory. This is due to the main-stream in land use research that predominantly operates with nominal scales, subdividing the Earth’s surface into discrete land cover units. This hampers the analysis of gradual changes, in particular those which are not related to changes in land cover. Intensification leads exactly to such changes. The overall goal of LUISE is the conceptualization and quantification of land use intensity and to contribute to an improved causal under-standing of land intensification. By applying and significantly extending existing methods of the material and energy flow analysis framework (MEFA), the full cycle of land intensification will be studied: Socioeco-nomic inputs to ecosystems, structural changes within ecosystems, changes in outputs of ecosystems to soci-ety, and the underlying socioeconomic constraints, feedbacks, and thresholds, from top-down macro perspec-tives as well as applying bottom-up approaches. The anticipated new empirical results and insights can allow further conceptualizations and quantifications of land modifications (land change without land cover change), and improve the understanding of the dynamic and complex interplay of society and nature that shapes spatial patterns as well as changes of land systems over time.
Summary
Land-use intensity is an essential aspect of the human use of terrestrial ecosystems. In the course of history, intensification of land use allowed to overcome Malthusian traps and supported population growth and im-proved diets. It can be anticipated that intensification will become even more decisive in the future, in the light of a growing world population, surges in biofuel consumption, and the simultaneous mandate to protect the world’s forests. Despite its importance, there is a lack of comprehensive, consistent, systematic, and spa-tially explicit metrics of land-use intensity. In consequence, the causal understanding of the factors, mecha-nisms, determinants and constraints underlying land intensification is unsatisfactory. This is due to the main-stream in land use research that predominantly operates with nominal scales, subdividing the Earth’s surface into discrete land cover units. This hampers the analysis of gradual changes, in particular those which are not related to changes in land cover. Intensification leads exactly to such changes. The overall goal of LUISE is the conceptualization and quantification of land use intensity and to contribute to an improved causal under-standing of land intensification. By applying and significantly extending existing methods of the material and energy flow analysis framework (MEFA), the full cycle of land intensification will be studied: Socioeco-nomic inputs to ecosystems, structural changes within ecosystems, changes in outputs of ecosystems to soci-ety, and the underlying socioeconomic constraints, feedbacks, and thresholds, from top-down macro perspec-tives as well as applying bottom-up approaches. The anticipated new empirical results and insights can allow further conceptualizations and quantifications of land modifications (land change without land cover change), and improve the understanding of the dynamic and complex interplay of society and nature that shapes spatial patterns as well as changes of land systems over time.
Max ERC Funding
887 121 €
Duration
Start date: 2010-10-01, End date: 2016-06-30
Project acronym NANOPHYS
Project Nanophysiology of fast-spiking, parvalbumin-expressing GABAergic interneurons
Researcher (PI) Peter Jonas
Host Institution (HI) INSTITUTE OF SCIENCE AND TECHNOLOGYAUSTRIA
Call Details Advanced Grant (AdG), LS5, ERC-2010-AdG_20100317
Summary In the present proposal, we plan to examine the dendrites, axons, and presynaptic terminals of fast-spiking, parvalbumin-expressing GABAergic interneurons using subcellular patch-clamp methods pioneered by the PI, imaging techniques, and computational approaches.
The goal is to obtain a quantitative nanophysiological picture of signaling in this key type of interneuron. By incorporating realistic BC models into dentate gyrus network models, we will be able to test the contribution of this important type of GABAergic interneuron to complex functions of the dentate gyrus, such as pattern separation, temporal deconvolution, and conversion from grid to place codes. The results may lay the basis for the development of new therapeutic strategies for treatment of diseases of the nervous system, targeting interneurons at subcellularly defined locations.
Summary
In the present proposal, we plan to examine the dendrites, axons, and presynaptic terminals of fast-spiking, parvalbumin-expressing GABAergic interneurons using subcellular patch-clamp methods pioneered by the PI, imaging techniques, and computational approaches.
The goal is to obtain a quantitative nanophysiological picture of signaling in this key type of interneuron. By incorporating realistic BC models into dentate gyrus network models, we will be able to test the contribution of this important type of GABAergic interneuron to complex functions of the dentate gyrus, such as pattern separation, temporal deconvolution, and conversion from grid to place codes. The results may lay the basis for the development of new therapeutic strategies for treatment of diseases of the nervous system, targeting interneurons at subcellularly defined locations.
Max ERC Funding
2 500 000 €
Duration
Start date: 2011-06-01, End date: 2017-02-28
Project acronym NWFV
Project Nonlinear studies of water flows with vorticity
Researcher (PI) Adrian Mircea Constantin
Host Institution (HI) UNIVERSITAT WIEN
Call Details Advanced Grant (AdG), PE1, ERC-2010-AdG_20100224
Summary The aim of the project is to build and promote a team of excellence in the mathematical theory of water flows, with emphasis on nonlinear aspects. Our aim is to advance the state-of-the-art of water flows with vorticity. Flows within a fixed fluid domain as well as free surface flows will be considered and we strive to provide an accurate description of the entire flow; for example, the flow beneath a water wave and not just a description of the water wave profile. Problems of this type are currently of great interest, for example in the context of wave-current interactions and for a better understanding of tsunami waves. In addition to methods from the theory of partial differential equations to investigate the governing equations for water waves, the use of simplified models with a rich structure (e.g. integrable systems arising in the shallow water regime) will identify and highlight qualitative features. Numerical simulation in conjunction with experimental feedback and the gathering of field data will be of great support. Provision is made for consultation and collaboration with research groups in engineering and physics. Due to the interest of the general public in tsunamis, one of the objectives is to have a positive impact on the perception of science by society and on the raising of scientific interest of the younger generation through public lectures and contacts with high-schools.
Summary
The aim of the project is to build and promote a team of excellence in the mathematical theory of water flows, with emphasis on nonlinear aspects. Our aim is to advance the state-of-the-art of water flows with vorticity. Flows within a fixed fluid domain as well as free surface flows will be considered and we strive to provide an accurate description of the entire flow; for example, the flow beneath a water wave and not just a description of the water wave profile. Problems of this type are currently of great interest, for example in the context of wave-current interactions and for a better understanding of tsunami waves. In addition to methods from the theory of partial differential equations to investigate the governing equations for water waves, the use of simplified models with a rich structure (e.g. integrable systems arising in the shallow water regime) will identify and highlight qualitative features. Numerical simulation in conjunction with experimental feedback and the gathering of field data will be of great support. Provision is made for consultation and collaboration with research groups in engineering and physics. Due to the interest of the general public in tsunamis, one of the objectives is to have a positive impact on the perception of science by society and on the raising of scientific interest of the younger generation through public lectures and contacts with high-schools.
Max ERC Funding
1 324 797 €
Duration
Start date: 2011-04-01, End date: 2016-03-31
