J. Seibert

Geostatistical investigation into the temporal evolution of spatial structure in a shallow water table (2008)

Lyon, S. W., Seibert, J., Lembo, A. J., Walter, M. T., Steenhuis, T. S.

Shallow water tables near-streams often lead to saturated, overland flow generating areas in catchments in humid climates. While these saturated areas are assumed to be principal biogeochemical...

On the calculation of the topographic wetness index: evaluation of different methods based on field observations (2008)

Sørensen, R., Zinko, U., Seibert, J.

The topographic wetness index (TWI, ln(a/tan?)), which combines local upslope contributing area and slope, is commonly used to quantify topographic control on hydrological processes. Methods of...

Multi-criteria calibration of a conceptual runoff model using a genetic algorithm (2008)

Seibert, J.

Abstract: Calibration of a model against more than one output variable is important for reliable simulations of internal processes. In this study, a genetic algorithm combined with local optimisation...

Geostatistical investigation into the temporal evolution of spatial structure in a shallow water table (2008)

Lyon, S. W., Seibert, J., Lembo, A. J., Walter, M. T., Steenhuis, T. S.

Shallow water tables near-streams often lead to saturated, overland flow generating areas in catchments in humid climates. While these saturated areas are assumed to be principal biogeochemical...

On the calculation of the topographic wetness index: evaluation of different methods based on field observations (2008)

Sørensen, R., Zinko, U., Seibert, J.

The topographic wetness index (TWI, ln(a/tan?)), which combines local upslope contributing area and slope, is commonly used to quantify topographic control on hydrological processes. Methods of...

Multi-criteria calibration of a conceptual runoff model using a genetic algorithm (2008)

Seibert, J.

Abstract: Calibration of a model against more than one output variable is important for reliable simulations of internal processes. In this study, a genetic algorithm combined with local optimisation...

On the calculation of the topographic wetness index: evaluation of different methods based on field observations (2008)

Sørensen, R., Zinko, U., Seibert, J.

The topographic wetness index (TWI, ln(a/tan?)), which combines local upslope contributing area and slope, is commonly used to quantify topographic control on hydrological processes. Methods of...

On the calculation of the topographic wetness index: evaluation of different methods based on field observations (2008)

Sørensen, R., Zinko, U., Seibert, J.

The topographic wetness index (TWI, ln(a/tan?)), which combines local upslope contributing area and slope, is commonly used to quantify topographic control on hydrological processes. Methods of...

Incorporating landscape characteristics in a distance metric for interpolating between observations of stream water chemistry (2008)

Lyon, S. W., Seibert, J., Lembo, A. J., Steenhuis, T. S., Walter, M. T.

Spatial patterns of water chemistry along stream networks can be quantified using synoptic or "snapshot" sampling. The basic idea is to sample stream water at many points over a relatively short...

Geostatistical investigation into the temporal evolution of spatial structure in a shallow water table (2008)

Lyon, S. W., Seibert, J., Lembo, A. J., Walter, M. T., Steenhuis, T. S.

Shallow water tables in the near-stream region often lead to saturated areas in catchments in humid climates. While these saturated areas are assumed to be of importance for issues such as non-point...

Incorporating landscape characteristics in a distance metric for interpolating between observations of stream water chemistry (2008)

Lyon, S. W., Seibert, J., Lembo, A. J., Steenhuis, T. S., Walter, M. T.

Spatial patterns of water chemistry along stream networks can be quantified using synoptic or "snapshot" sampling. The basic idea is to sample stream water at many points over a relatively short...

Geostatistical investigation into the temporal evolution of spatial structure in a shallow water table (2008)

Lyon, S. W., Seibert, J., Lembo, A. J., Walter, M. T., Steenhuis, T. S.

Shallow water tables in the near-stream region often lead to saturated areas in catchments in humid climates. While these saturated areas are assumed to be of importance for issues such as non-point...

HELPing FRIENDs in PUBs: charting a course for synergies within international water research programmes in gauged and unguaged basins (2006)

Bonell, M., McDonnell, J., Scatena, F.N., Seibert, J., Uhlenbrook, S.

On the calculation of the topographic wetness index: evaluation of different methods based on field observations (2006)

R. Sørensen, U. Zinko, J. Seibert

The topographic wetness index (TWI, ln(a/tanβ)), which combines local upslope contributing area and slope, is commonly used to quantify topographic control on hydrological processes. Methods of...

Geostatistical investigation into the temporal evolution of spatial structure in a shallow water table (2006)

S. W. Lyon, J. Seibert, A. J. Lembo, M. T. Walter, T. S. Steenhuis

Shallow water tables near-streams often lead to saturated, overland flow generating areas in catchments in humid climates. While these saturated areas are assumed to be principal biogeochemical...

Determination of the ratios of the F2(n) and F2(p) structure functions and the u- and d-valence quark distributions (2002)

Seibert, J

The Longitudinal Polarimeter at HERA (2000)

Beckmann, M., Borissov, A., Brauksiepe, S., Burkart, F., Fischer, H., Franz, J., ...

The design, construction and operation of a Compton back-scattering laser polarimeter at the HERA storage ring at DESY are described. The device measures the longitudinal polarization of the electron...

Multi-criteria calibration of a conceptual runoff model using a genetic algorithm (2000)

J. Seibert

Abstract: Calibration of a model against more than one output variable is important for reliable simulations of internal processes. In this study, a genetic algorithm combined with local optimisation...

Double-spin asymmetry in the cross section for exclusive rho0 production in lepton-proton scattering

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...

Evidence for a positive longitudinal double-spin asymmetry (A/sub 1//sup rho /)=0.24+or-0.11/sub stat/+or-0.02/sub syst/ in the cross section for exclusive diffractive rho /sup 0/(770) vector-meson...

Evidence for quark-hadron duality in the proton spin asymmetry A1

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Aschenauer, E.C., ...

Spin-dependent lepton-nucleon scattering data have been used to investigate the validity of the concept of quark-hadron duality for the spin asymmetry A1. Longitudinally polarized positrons were...

Hadron formation in deep-inelastic positron scattering in a nuclear environment

Airapetian, A., Akopov, N., Akopov, Z., Akushevich, I., Amarian, T., Arrington, J., ...

The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam....

Measurement of longitudinal spin transfer to Lambda hyperons in deep-inelastic lepton scattering

Airapetian, A., Akopov, N., Amarian, M., Aschenauer, E.C., Avakian, H., Avakian, R., ...

Spin transfer in deep-inelastic Lambda electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the DESY HERA storage ring. For an average fractional...

Measurement of single-spin azimuthal asymmetries in semi-inclusive electroproduction of pions and kaons on a longitudinally polarised deuterium target

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...

Single-spin asymmetries have been measured for semi-inclusive electroproduction of pi /sup +/, pi /sup -/, pi /sup 0/ and K/sup +/ mesons in deep-inelastic scattering off a longitudinally polarised...

Multiplicity of charged and neutral pions in deep-inelastic scattering of 27.5 GeV positrons on hydrogen

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...

Measurements of the individual multiplicities of pi /sup +/, pi /sup -/ and pi /sup 0/ produced in the deep-inelastic scattering of 27.5 GeV positrons on hydrogen are presented. The average charged...

Q2 dependence of nuclear transparency for exclusive rho0 production

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...

Exclusive coherent and incoherent electroproduction of the rho(0) meson from H-1 and N-14 targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to...

Q2 dependence of nuclear transparency for exclusive rho0 production

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...

Exclusive coherent and incoherent electroproduction of the rho(0) meson from H-1 and N-14 targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to...

Single-spin azimuthal asymmetry in exclusive electroproduction of pi /sup +/ mesons

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Aschenauer, E.C., Avakian, H., ...

A single-spin asymmetry in the distribution of exclusively produced pi /sup +/ mesons azimuthally around the virtual photon direction relative to the lepton scattering plane has been measured for the...

Single-spin azimuthal asymmetries in electroproduction of neutral pions in semi-inclusive deep-inelastic scattering

Airapetian, A, Akopov, N., Akopov, Z., Amarian, M, Aschenauer, E. C., Avakian, H., ...

A single-spin asymmetry in the azimuthal distribution of neutral pions relative to the lepton scattering plane has been measured for the first time in deep-inelastic scattering of positrons off...

The Q(2)-dependence of the generalised Gerasimov-Drell-Hearn integral for the deuteron, proton and neutron

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Aschenauer, E.C., ...

The Gerasimov-Drell-Hearn (GDH) sum rule connects the anomalous contribution to the magnetic moment of the target nucleus with an energy-weighted integral of the difference of the helicity- dependent...

Double-spin asymmetry in the cross section for exclusive rho0 production in lepton-proton scattering

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...

Evidence for a positive longitudinal double-spin asymmetry (A/sub 1//sup rho /)=0.24+or-0.11/sub stat/+or-0.02/sub syst/ in the cross section for exclusive diffractive rho /sup 0/(770) vector-meson...

Evidence for quark-hadron duality in the proton spin asymmetry A1

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Aschenauer, E.C., ...

Spin-dependent lepton-nucleon scattering data have been used to investigate the validity of the concept of quark-hadron duality for the spin asymmetry A1. Longitudinally polarized positrons were...

Hadron formation in deep-inelastic positron scattering in a nuclear environment

Airapetian, A., Akopov, N., Akopov, Z., Akushevich, I., Amarian, T., Arrington, J., ...

The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam....

Measurement of longitudinal spin transfer to Lambda hyperons in deep-inelastic lepton scattering

Airapetian, A., Akopov, N., Amarian, M., Aschenauer, E.C., Avakian, H., Avakian, R., ...

Spin transfer in deep-inelastic Lambda electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the DESY HERA storage ring. For an average fractional...

Measurement of single-spin azimuthal asymmetries in semi-inclusive electroproduction of pions and kaons on a longitudinally polarised deuterium target

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...

Single-spin asymmetries have been measured for semi-inclusive electroproduction of pi /sup +/, pi /sup -/, pi /sup 0/ and K/sup +/ mesons in deep-inelastic scattering off a longitudinally polarised...

Multiplicity of charged and neutral pions in deep-inelastic scattering of 27.5 GeV positrons on hydrogen

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Arrington, J., Aschenauer, E.C., ...

Measurements of the individual multiplicities of pi /sup +/, pi /sup -/ and pi /sup 0/ produced in the deep-inelastic scattering of 27.5 GeV positrons on hydrogen are presented. The average charged...

Q2 dependence of nuclear transparency for exclusive rho0 production

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...

Exclusive coherent and incoherent electroproduction of the rho(0) meson from H-1 and N-14 targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to...

Q2 dependence of nuclear transparency for exclusive rho0 production

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Andrus, A., ...

Exclusive coherent and incoherent electroproduction of the rho(0) meson from H-1 and N-14 targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to...

Single-spin azimuthal asymmetry in exclusive electroproduction of pi /sup +/ mesons

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Aschenauer, E.C., Avakian, H., ...

A single-spin asymmetry in the distribution of exclusively produced pi /sup +/ mesons azimuthally around the virtual photon direction relative to the lepton scattering plane has been measured for the...

Single-spin azimuthal asymmetries in electroproduction of neutral pions in semi-inclusive deep-inelastic scattering

Airapetian, A, Akopov, N., Akopov, Z., Amarian, M, Aschenauer, E. C., Avakian, H., ...

A single-spin asymmetry in the azimuthal distribution of neutral pions relative to the lepton scattering plane has been measured for the first time in deep-inelastic scattering of positrons off...

The Q(2)-dependence of the generalised Gerasimov-Drell-Hearn integral for the deuteron, proton and neutron

Airapetian, A., Akopov, N., Akopov, Z., Amarian, M., Ammosov, V.V., Aschenauer, E.C., ...

The Gerasimov-Drell-Hearn (GDH) sum rule connects the anomalous contribution to the magnetic moment of the target nucleus with an energy-weighted integral of the difference of the helicity- dependent...