9,379 research outputs found
Policy change and learning: Implementing EU environmental policies affecting agriculture
This thesis aims to show whether and how the implementation of the EU environmental policy could be improved through policy learning. The results are based on two case studies: the development of agri-environmental policy in Finland and the implementation of the Water Framework Directive(WFD)in Ireland.
The institutional analysis shows that the institutional structures changed due to the membership: the formal structures changed almost overnight and, as a result of increased cross-sectoral cooperation and policy learning, the informal structures also changed.
The implementation of agri-environmental policy was studied in one administrative region, namely Uusimaa, located in southern Finland.
The adaptation of EU environmental policies is an interesting research topic, not only because of the policy process itself but also because of the actors and context involved
Silicon Pixel R&D for the CLIC Tracking Detector
The physics aims at the proposed high-energy collider CLIC pose
challenging demands on the performance of the detector system. Precise hit-time
tagging, an excellent spatial resolutions, and a low mass are required for the
vertex and tracking detectors. To meet these requirements, an all-silicon
vertex and tracking detector system is foreseen, for which a broad R&D
programme on a variety of novel silicon detector technologies is being pursued.
For the ultra-low mass vertex detector, different hybrid technologies with
innovative sensor concepts and interconnection techniques are explored. For the
large-scale tracking detector, the focus of the R&D lies on monolithic HV-MAPS
and HR-CMOS technologies. This contribution gives an overview of the ongoing
activities with a focus on monolithic technologies for the CLIC tracking
detector. Recent results from laboratory and test-beam measurement campaigns of
the ATLASpix_Simple and the CLICTD sensor prototypes are presented.Comment: Proceedings for INSTR20, 10 pages, 9 figure
Spectrum and wave functions of excited states in lattice gauge theory
We suggest a new method to compute the spectrum and wave functions of excited states. We construct a stochastic basis of Bargmann link states, drawn from a physical probability density distribution and compute transition amplitudes between stochastic basis states. From such transition matrix we extract wave functions and the energy spectrum. We apply this method toU(1)2+1 lattice gauge theory. As a test we compute the energy spectrum, wave functions and thermodynamical functions of the electric Hamiltonian and compare it with analytical results. We find excellent agreement. We observe scaling of energies and wave functions in the variable of time. We also present first results on a small lattice for the full Hamiltonian including the magnetic term
The Massive Schwinger Model in a Fast Moving Frame
We present a non-perturbative study of the massive Schwinger model. We use a
Hamiltonian approach, based on a momentum lattice corresponding to a fast
moving reference frame, and equal time quantization.Comment: contribution to Lattice'98 including: 2 style files
(espcrc2.sty,psfig.sty) + text file (LaTeX) + 3 figures (ps) + complete
paper(ps
Generalized Aharonov-Bohm effect, homotopy classes and Hausdorff dimension
We suggest as gedanken experiment a generalization of the Aharonov-Bohm
experiment, based on an array of solenoids. This experiment allows in principle
to measure the decomposition into homotopy classes of the quantum mechanical
propagator. This yields information on the geometry of the average path of
propagation and allows to determine its Hausdorff dimension.Comment: 14 pages, LaTeX + 3 figures, P
Bioinformatics Databases: State of the Art and Research Perspectives
Bioinformatics or computational biology, i.e. the application of mathematical and computer science methods to solving problems in molecular biology that require large scale data, computation, and analysis, is a research area currently receiving a considerable attention. Databases play an essential role in molecular biology and consequently in bioinformatics. molecular biology data are often relatively cheap to produce, leading to a proliferation of databases: the number of bioinformatics databases accessible worldwide probably lies between 500 and 1.000. Not only molecular biology data, but also molecular biology literature and literature references are stored in databases. Bioinformatics databases are often very large (e.g. the sequence database GenBank contains more than 4 × 10 6 nucleotide sequences) and in general grows rapidly (e.g. about 8000 abstracts are added every month to the literature database PubMed). Bioinformatics databases are heterogeneous in their data, in their data modeling paradigms, in their management systems, and in the data analysis tools they supports. Furthermore, bioinformatics databases are often implemented, queried, updated, and managed using methods rarely applied for other databases. This presentation aims at introducing in current bioinformatics databases, stressing their aspects departing from conventional databases. A more detailed survey can be found in [1] upon which thi
A Molecular Biology Database Digest
Computational Biology or Bioinformatics has been defined as the application of mathematical
and Computer Science methods to solving problems in Molecular Biology that require large scale
data, computation, and analysis [18]. As expected, Molecular Biology databases play an essential
role in Computational Biology research and development. This paper introduces into current
Molecular Biology databases, stressing data modeling, data acquisition, data retrieval, and the
integration of Molecular Biology data from different sources. This paper is primarily intended
for an audience of computer scientists with a limited background in Biology
Topological analysis of polymeric melts: Chain length effects and fast-converging estimators for entanglement length
Primitive path analyses of entanglements are performed over a wide range of
chain lengths for both bead spring and atomistic polyethylene polymer melts.
Estimators for the entanglement length N_e which operate on results for a
single chain length N are shown to produce systematic O(1/N) errors. The
mathematical roots of these errors are identified as (a) treating chain ends as
entanglements and (b) neglecting non-Gaussian corrections to chain and
primitive path dimensions. The prefactors for the O(1/N) errors may be large;
in general their magnitude depends both on the polymer model and the method
used to obtain primitive paths. We propose, derive and test new estimators
which eliminate these systematic errors using information obtainable from the
variation of entanglement characteristics with chain length. The new estimators
produce accurate results for N_e from marginally entangled systems. Formulas
based on direct enumeration of entanglements appear to converge faster and are
simpler to apply.Comment: Major revisions. Developed near-ideal estimators which operate on
multiple chain lengths. Now test these on two very different model polymers
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