TY  - JOUR
A1  - Bayon, Arnau
A1  - Valero, Daniel
A1  - Garcia-Bartual, Rafael
A1  - Vallés-Morán, Francisco José
A1  - López-Jiménez, P. Amparo
T1  - Performance assessment of OpenFOAM and FLOW-3D in the numerical modeling of a low Reynolds number hydraulic jump
JF  - Environmental Modelling & Software
N2  - A comparative performance analysis of the CFD platforms OpenFOAM and FLOW-3D is presented, focusing on a 3D swirling turbulent flow: a steady hydraulic jump at low Reynolds number. Turbulence is treated using RANS approach RNG k-ε. A Volume Of Fluid (VOF) method is used to track the air–water interface, consequently aeration is modeled using an Eulerian–Eulerian approach. Structured meshes of cubic elements are used to discretize the channel geometry. The numerical model accuracy is assessed comparing representative hydraulic jump variables (sequent depth ratio, roller length, mean velocity profiles, velocity decay or free surface profile) to experimental data. The model results are also compared to previous studies to broaden the result validation. Both codes reproduced the phenomenon under study concurring with experimental data, although special care must be taken when swirling flows occur. Both models can be used to reproduce the hydraulic performance of energy dissipation structures at low Reynolds numbers.
Y1  - 2016
SN  - 1364-8152
U6  - https://doi.org/10.1016/j.envsoft.2016.02.018
VL  - 80
SP  - 322
EP  - 335
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Bayer, Robin
A1  - Temiz Artmann, Aysegül
A1  - Digel, Ilya
A1  - Falkenstein, Julia
A1  - Artmann, Gerhard
A1  - Creutz, Till
A1  - Hescheler, Jürgen
T1  - Mechano-pharmacological testing of L-Type Ca²⁺ channel modulators via human vascular celldrum model
JF  - Cellular Physiology and Biochemistry
N2  - Background/Aims: This study aimed to establish a precise and well-defined working model, assessing pharmaceutical effects on vascular smooth muscle cell monolayer in-vitro. It describes various analysis techniques to determine the most suitable to measure the biomechanical impact of vasoactive agents by using CellDrum technology. Methods: The so-called CellDrum technology was applied to analyse the biomechanical properties of confluent human aorta muscle cells (haSMC) in monolayer. The cell generated tensions deviations in the range of a few N/m² are evaluated by the CellDrum technology. This study focuses on the dilative and contractive effects of L-type Ca²⁺ channel agonists and antagonists, respectively. We analyzed the effects of Bay K8644, nifedipine and verapamil. Three different measurement modes were developed and applied to determine the most appropriate analysis technique for the study purpose. These three operation modes are called, particular time mode" (PTM), "long term mode" (LTM) and "real-time mode" (RTM). Results: It was possible to quantify the biomechanical response of haSMCs to the addition of vasoactive agents using CellDrum technology. Due to the supplementation of 100nM Bay K8644, the tension increased approximately 10.6% from initial tension maximum, whereas, the treatment with nifedipine and verapamil caused a significant decrease in cellular tension: 10nM nifedipine decreased the biomechanical stress around 6,5% and 50nM verapamil by 2,8%, compared to the initial tension maximum. Additionally, all tested measurement modes provide similar results while focusing on different analysis parameters. Conclusion: The CellDrum technology allows highly sensitive biomechanical stress measurements of cultured haSMC monolayers. The mechanical stress responses evoked by the application of vasoactive calcium channel modulators were quantified functionally (N/m²). All tested operation modes resulted in equal findings, whereas each mode features operation-related data analysis.
Y1  - 2020
U6  - https://doi.org/10.33594/000000225
SN  - 1421-9778
VL  - 54
SP  - 371
EP  - 383
PB  - Cell Physiol Biochem Press
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Baums, Bodo
T1  - Hubschrauberzellen aus Faserverbund-Werkstoffen
JF  - Kunststoffe. 82 (1992), H. 11
Y1  - 1992
SN  - 0023-5563
SP  - 1114
EP  - 1118
ER  - 
TY  - JOUR
A1  - Baumgartner, Werner
A1  - Fidler, Florian
A1  - Weth, Agnes
A1  - Habbecke, Martin
A1  - Jakob, Peter
A1  - Butenweg, Christoph
A1  - Böhme, Wolfgang
T1  - Investigating the locomotion of the sandfish in desert sand using NMR-Imaging
JF  - PLOS ONE
N2  - The sandfish (Scincus scincus) is a lizard having the remarkable ability to move through desert sand for significant distances. It is well adapted to living in loose sand by virtue of a combination of morphological and behavioural specializations. We investigated the bodyform of the sandfish using 3D-laserscanning and explored its locomotion in loose desert sand using fast nuclear magnetic resonance (NMR) imaging. The sandfish exhibits an in-plane meandering motion with a frequency of about 3 Hz and an amplitude of about half its body length accompanied by swimming-like (or trotting) movements of its limbs. No torsion of the body was observed, a movement required for a digging-behaviour. Simple calculations based on the Janssen model for granular material related to our findings on bodyform and locomotor behaviour render a local decompaction of the sand surrounding the moving sandfish very likely. Thus the sand locally behaves as a viscous fluid and not as a solid material. In this fluidised sand the sandfish is able to “swim” using its limbs.
KW  - magnetic resonance imaging
KW  - body limbs
KW  - swimming
KW  - lizards
KW  - deserts
Y1  - 2008
U6  - https://doi.org/10.1371/journal.pone.0003309
SN  - 1932-6203
VL  - 3
IS  - 10
PB  - Plos
CY  - San Francisco, California, US
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Tillmann, U.
A1  - Aletsee, L.
T1  - Distribution of Carbon Among Photosynthetic End Products in the Bloom-Forming Arctic Diatom Thalassiosira antarctica COMBER / Tillmann, U. ; Baumann, M.E.M. ; Aletsee, L.
JF  - Polar Biology. 10 (1989), H. 3
Y1  - 1989
SN  - 0722-4060
SP  - 231
EP  - 238
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Thomas, D.
A1  - Gleitz, M.
T1  - Efficiency of carbon assimilation and photoacclimation in a small unicellular Chaetoceros species from the Weddel Sea (Antarctica): Influence of temperature and irridiance / Thomas, D. ; Baumann, M.E.M. ; Gleitz, M.
JF  - Journal of Experimental Marine Biology and Ecology. 157 (1992), H. 2
Y1  - 1992
SN  - 0022-0981
SP  - 195
EP  - 209
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Semeneh, M.
A1  - Dehairs, F.
A1  - Elskens, M.
T1  - Nitrogen uptake regime and phytoplankton community structure in the Southern Ocean / Semeneh, M. ; Dehairs, F. ; Elskens, M. ; Baumann, M.E.M. ; Kopczynska, E.E. ; Lancelot, C. ; Goeyens, L.
JF  - Journal of Marine Systems. 17 (1998), H. 1-4
Y1  - 1998
SN  - 0924-7963
SP  - 159
EP  - 177
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Schwarz, Sonja
A1  - Kotliar, Konstantin
A1  - Eynatten, Maximilian von
A1  - Trucksaess, Arno
A1  - Burckhardt, Klaus
A1  - Lutz, Jens
A1  - Heemann, Uwe
A1  - Lanzl, Ines
T1  - Non-diabetic chronic kidney disease influences retinal microvasculature
JF  - Kidney and Blood Pressure Research
Y1  - 2009
SN  - 1423-0143
VL  - 32
IS  - 6
SP  - 428
EP  - 433
PB  - -
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Rousseau, V.
A1  - Vaulot, D.
A1  - Casotti, R.
T1  - The life cycle of Phaeocystis (Prymnesiophycae): evidence and hypotheses / Rousseau, V. ; Vaulot, D. ; Casotti, R. ; Cariou, V. ; Lenz, J. ; Gunkel, J. ; Baumann, M.
JF  - Journal of Marine Systems. 5 (1994), H. 1
Y1  - 1994
SN  - 0924-7963
SP  - 23
EP  - 39
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Peschel, G.
T1  - Aktuelle Entwicklungen zur Luftreinhaltung in der Stadt Aachen
JF  - Wechselwirkung : Wissenschaft & vernetztes Denken
Y1  - 1998
SN  - 0172-1623
VL  - 20
IS  - 91
SP  - 22
EP  - 29
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Peschel, G.
T1  - Das Klima Aachens, lokale Ansprüche und globale Auswirkungen
JF  - Wechselwirkung : Wissenschaft & vernetztes Denken
Y1  - 1998
SN  - 0172-1623
VL  - 20
IS  - 93
SP  - 26
EP  - 33
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Lara, R.J.
A1  - Hubberten, D.N.
A1  - Thomas, D.N.
T1  - Dissolved organic matter studies in enclosed systems: Application of hydophobic fractionation for the assessment of organic nitrogen dynamics / Lara, R.J. ; Hubberten, U. ; Thomas, D.N. ; Baumann, M.E.M. ; Kattner, G.
JF  - Journal of Marine Systems. 13 (1997), H. 1-4
Y1  - 1997
SN  - 0924-7963
SP  - 155
EP  - 161
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Lancelot, C.
A1  - Brandini, F.
A1  - Sakshaug, E.
T1  - The taxonomic identity of the cosmopolitan prymnesiophyte Phaeocystis, a morphological and ecophysiological approach / Baumann, M.E.M. ; Lancelot, C. ; Brandini, F. ; Sakshaug, E. ; John M.
JF  - Journal of Marine Systems. 5 (1994), H. 1
Y1  - 1994
SN  - 0924-7963
SP  - 5
EP  - 22
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Krämer, M.
T1  - Marine Planktonalgen der Arktis II. Diatomeen / Baumann, M. ; Krämer, M.
JF  - Mikrokosmos. 75 (1986), H. 10
Y1  - 1986
SN  - 0026-3680
SP  - 306
EP  - 310
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Jahnke, J.
T1  - Chemical and Physical Effects on the Shape and Growth of the Diatom Biddulphia sinensis GREVILLE in Batch Cultures: A Contribution to Bioindication in Plankton Ecology / Jahnke, J. ; Baumann, M.
JF  - Hydrobiological Bulletin . 17 (1983), H. 1
Y1  - 1983
SN  - 0165-1404
SP  - 5
EP  - 20
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Jahnke, J.
T1  - Marine Planktonalgen der Arktis I. Die Haptophycee Phaeocystis pouchetii / Baumann, M. ; Jahnke, J.
JF  - Mikrokosmos. 75 (1986), H. 9
Y1  - 1986
SN  - 0026-3680
SP  - 262
EP  - 265
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Jahnke, J.
T1  - Die marine Planktonalge Phaeocystis globosa / Jahnke, J. ; Baumann, M.
JF  - Mikrokosmos. 75 (1986), H. 12
Y1  - 1986
SN  - 0026-3680
SP  - 357
EP  - 359
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Hirche, H.-J.
A1  - Kattner, G.
A1  - Gradinger, R.
T1  - Plankton distribution and the impact of copepod grazing on primary production in Fram Strait, Greenland Sea / Hirche, H.-J. ; Baumann, M.E.M. ; Kattner, G.; Gradinger, R.
JF  - Journal of Marine Systems. 2 (1991), H. 3-4
Y1  - 1991
SN  - 0924-7963
SP  - 477
EP  - 494
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Gronsfeld, A.
A1  - Schütz-Lembach, G.
T1  - Nachdenklichkeit über Nachhaltigkeit : wie uns ein neues Wort alte Probleme neu entdecken läßt
JF  - Wechselwirkung : Wissenschaft & vernetztes Denken
Y1  - 1997
SN  - 0172-1623
VL  - 19
IS  - 87
SP  - 6
EP  - 11
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Gradinger, R.
T1  - Distribution of Phytoplankton Communities in Relation to the Large Scale Hydrographical Regime in the Fram Strait 1984 / Gradinger, R. ; Baumann, M.E.M.
JF  - Marine Biology. 111 (1991), H. 2
Y1  - 1991
SN  - 0025-3162
SP  - 311
EP  - 321
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Goeyens, L.
A1  - Tréguer, P.
A1  - Baeyens, W.
T1  - The leading role of ammonium in the nitrogen uptake regime of Southern Ocean marginal ice zones / Goeyens, L. ; Tréguer, P. ; Baumann, M.E.M. ; Baeyens, W. ; Dehairs, F.
JF  - Journal of Marine Systems. 6 (1995), H. 4
Y1  - 1995
SN  - 0924-7963
SP  - 345
EP  - 361
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Goeyens, L.
A1  - Semeneh, M.
A1  - Elskens, M.
T1  - Phytoplankton nutrient utilisation and nutrient signature in the Southern Ocean / Goeyens, L. ; Semeneh, M. ; Baumann, M.E.M. ; Elskens, M. ; Shopova, D. ; Dehairs, F.
JF  - Journal of Marine Systems. 17 (1998), H. 1-4
Y1  - 1998
SN  - 0924-7963
SP  - 143
EP  - 157
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
A1  - Brandini, Frederico
A1  - Staubes, Regina
T1  - The influence of light and temperature on carbonspecific DMS release by cultures of Phaeocystis antarctica and three antarctic diatoms / Baumann, Marcus E.M. ; Brandini, Frederico ; Staubes, Regina
JF  - Marine Chemistry. 45 (1994), H. 1-2
Y1  - 1994
SN  - 0304-4203
SP  - 129
EP  - 136
ER  - 
TY  - JOUR
A1  - Baumann, Marcus
T1  - Algenblüten & Treibhauseffekt : Wechselwirkungen mit anthropogenen Aktivitäten
JF  - Wechselwirkung : Wissenschaft & vernetztes Denken
Y1  - 1996
SN  - 0172-1623
VL  - 18
IS  - 81
SP  - 6
EP  - 11
ER  - 
TY  - JOUR
A1  - Bassam, Rasha
A1  - Hescheler, Jürgen
A1  - Temiz Artmann, Aysegül
A1  - Artmann, Gerhard
A1  - Digel, Ilya
T1  - Effects of spermine NONOate and ATP on the thermal stability of hemoglobin
JF  - BMC Biophysics
N2  - Background
Minor changes in protein structure induced by small organic and inorganic molecules can result in significant metabolic effects. The effects can be even more profound if the molecular players are chemically active and present in the cell in considerable amounts. The aim of our study was to investigate effects of a nitric oxide donor (spermine NONOate), ATP and sodium/potassium environment on the dynamics of thermal unfolding of human hemoglobin (Hb). The effect of these molecules was examined by means of circular dichroism spectrometry (CD) in the temperature range between 25°C and 70°C. The alpha-helical content of buffered hemoglobin samples (0.1 mg/ml) was estimated via ellipticity change measurements at a heating rate of 1°C/min.

Results
Major results were:
1) spermine NONOate persistently decreased the hemoglobin unfolding temperature T u irrespectively of the Na + /K + environment,
2) ATP instead increased the unfolding temperature by 3°C in both sodium-based and potassium-based buffers and
3) mutual effects of ATP and NO were strongly influenced by particular buffer ionic compositions. Moreover, the presence of potassium facilitated a partial unfolding of alpha-helical structures even at room temperature.

Conclusion
The obtained data might shed more light on molecular mechanisms and biophysics involved in the regulation of protein activity by small solutes in the cell.
KW  - Nitric Oxide Donor
KW  - NONOate
KW  - Circular Dichroism
KW  - Nitric Oxide
Y1  - 2012
U6  - https://doi.org/10.1186/2046-1682-5-16
SN  - 2046-1682
VL  - 5
PB  - BioMed Central
CY  - London
ER  - 
TY  - JOUR
A1  - Bassam, Rasha
A1  - Digel, Ilya
A1  - Hescheler, Jürgen
A1  - Temiz Artmann, Aysegül
A1  - Artmann, Gerhard
T1  - Effects of spermine NONOate and ATP on protein aggregation: light scattering evidences
JF  - BMC Biophysics
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?10.1186/2046-1682-6-1
SN  - 2046-1682
SP  - 1
EP  - 14
PB  - BioMed Central
CY  - London
ER  - 
TY  - JOUR
A1  - Barth, Heiko
A1  - Wollert, Jörg
T1  - SMARTes Konzept - von Produkt zur Fabrik
JF  - Facility-Management : Integration, Planung, Gebäudemanagement
Y1  - 1998
SN  - 0948-0048
VL  - Bd. 4
IS  - H. August
SP  - 30
EP  - 35
ER  - 
TY  - JOUR
A1  - Bartella, Alexander K.
A1  - Kamal, Mohammad
A1  - Scholl, Ingrid
A1  - Schiffer, Stefan
A1  - Steegmann, Julius
A1  - Ketelsen, Dominik
A1  - Hölzle, Frank W.
A1  - Lethaus, Bernd
T1  - Virtual reality in preoperative imaging in maxillofacial surgery: implementation of “the next level”?
JF  - British Journal of Oral and Maxillofacial Surgery
Y1  - 2019
U6  - https://doi.org/10.1016/j.bjoms.2019.02.014
SN  - 0266-4356
VL  - 57
IS  - 7
SP  - 644
EP  - 648
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Barsov, S.
A1  - Bechstedt, U.
A1  - Hardt, Arno
T1  - ANKE, a new facility for medium energy hadron physics at COSY-Jülich / S. Barsov [u.a.]
JF  - Nuclear instruments and methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. Vol. 462, iss. 3
Y1  - 2001
SN  - 0167-5087 (Print) ; 0168-9002 (E-journal)
SP  - 364
EP  - 381
ER  - 
TY  - JOUR
A1  - Barnat, Miriam
A1  - Kenneweg, Anne Cornelia
A1  - Salden, Peter
A1  - Schramm, Christin
A1  - Schumann, Marlen
T1  - Das ‚Junge Forum‘ als Format der Nachwuchsförderung. Ein Beitrag zu Professionalisierung, Netzwerkbildung und kooperativem Lernen
JF  - Lern- und Bildungsprozesse gestalten. Junges Forum Medien und Hochschulentwicklung (JFMH13)
N2  - Im Mai 2012 fand in Hamburg erstmals das „Junge Forum Hochschul- und Mediendidaktik“ statt, im Juni 2013 folgte in Potsdam die zweite Auflage als „Junges Forum Medien und Hochschulentwicklung“. 2014 wurde das dritte „Forum“ in Dresden und 2015 das vierte in Düsseldorf ausgerichtet. Das fünfte Forum wird 2016 an der Technischen Universität Darmstadt stattfinden. Initiiert und organisiert wird die Veranstaltung stets von jungen Praktikerinnen und Praktikern sowie Forscherinnen und Forschern mit dem Ziel, dem ‚Nachwuchs‘ in diesem Bereich ein Austauschforum zu geben. Der vorliegende Artikel stellt die konzeptionellen Überlegungen vor, die hinter diesen Treffen stehen. Er zeigt im Rückgriff auf Netzwerktheorie und aktuelle Diskussionen um Professionalisierung und Third Space, wieso für dieses Format ein aktueller Bedarf besteht, und begründet dann im Rückgriff auf didaktische Konzepte auch die methodische Gestaltung der Veranstaltungen. Unsere These: Das kooperative Lernen in Netzwerken ist ein wichtiger Baustein für die Professionalisierung des hochschul- und mediendidaktischen Nachwuchses.
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0111-pedocs-168520
SN  - 978-3-8309-3397-7
N1  - Medien in der Wissenschaft; 70
SP  - 269
EP  - 282
PB  - Waxmann
CY  - Münster
ER  - 
TY  - JOUR
A1  - Barnat, Miriam
A1  - Faria, Joana Abelha
A1  - Bosse, Elke
T1  - Heterogenität und Studierfähigkeit: Erste Ergebnisse einer Längsschnittbefragung
JF  - Qualität in der Wissenschaft: QiW ; Zeitschrift für Qualitätsentwicklung in Forschung, Studium und Administration
Y1  - 2017
SN  - 1860-3041
N1  - gedruckt in der Bereichsbibliothek Eupener Str. vorhanden
VL  - 11
IS  - 1
SP  - 17
EP  - 24
PB  - UVW Universitäts-Verlag Webler
CY  - Bielefeld
ER  - 
TY  - JOUR
A1  - Barnat, Miriam
A1  - Bosse, Elke
A1  - Mergner, Julia
T1  - Forschungsbasierte Qualitätsentwicklung für die Studieneingangsphase
JF  - Zeitschrift für Hochschulentwicklung (ZFHE)
Y1  - 2017
U6  - https://doi.org/10.3217/zfhe-12-03/05
SN  - 2219-6994
VL  - 12
IS  - 3
SP  - 71
EP  - 91
ER  - 
TY  - JOUR
A1  - Baringhaus, Ludwig
A1  - Gaigall, Daniel
A1  - Thiele, Jan Philipp
T1  - Statistical inference for L²-distances to uniformity
JF  - Computational Statistics
N2  - The paper deals with the asymptotic behaviour of estimators, statistical tests and confidence intervals for L²-distances to uniformity based on the empirical distribution function, the integrated empirical distribution function and the integrated empirical survival function. Approximations of power functions, confidence intervals for the L²-distances and statistical neighbourhood-of-uniformity validation tests are obtained as main applications. The finite sample behaviour of the procedures is illustrated by a simulation study.
KW  - Integrated empirical distribution (survival) function
KW  - Goodness-of-fit tests for uniformity
KW  - Numerical inversion of Laplace transforms
KW  - Coverage probability
KW  - Equivalence test
Y1  - 2018
U6  - https://doi.org/10.1007/s00180-018-0820-0
SN  - 1613-9658
VL  - 2018
IS  - 33
SP  - 1863
EP  - 1896
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Baringhaus, Ludwig
A1  - Gaigall, Daniel
T1  - A goodness-of-fit test for the compound Poisson exponential model
JF  - Journal of Multivariate Analysis
N2  - On the basis of bivariate data, assumed to be observations of independent copies of a random vector (S,N), we consider testing the hypothesis that the distribution of (S,N) belongs to the parametric class of distributions that arise with the compound Poisson exponential model. Typically, this model is used in stochastic hydrology, with N as the number of raindays, and S as total rainfall amount during a certain time period, or in actuarial science, with N as the number of losses, and S as total loss expenditure during a certain time period. The compound Poisson exponential model is characterized in the way that a specific transform associated with the distribution of (S,N) satisfies a certain differential equation. Mimicking the function part of this equation by substituting the empirical counterparts of the transform we obtain an expression the weighted integral of the square of which is used as test statistic. We deal with two variants of the latter, one of which being invariant under scale transformations of the S-part by fixed positive constants. Critical values are obtained by using a parametric bootstrap procedure. The asymptotic behavior of the tests is discussed. A simulation study demonstrates the performance of the tests in the finite sample case. The procedure is applied to rainfall data and to an actuarial dataset. A multivariate extension is also discussed.
KW  - Bootstrapping
KW  - Collective risk model
Y1  - 2022
U6  - https://doi.org/10.1016/j.jmva.2022.105154
SN  - 0047-259X
SN  - 1095-7243
VL  - 195
IS  - Article 105154
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Baringhaus, Ludwig
A1  - Gaigall, Daniel
T1  - Efficiency comparison of the Wilcoxon tests in paired and independent survey samples
JF  - Metrika
N2  - The efficiency concepts of Bahadur and Pitman are used to compare the Wilcoxon tests in paired and independent survey samples. A comparison through the length of corresponding confidence intervals is also done. Simple conditions characterizing the dominance of a procedure are derived. Statistical tests for checking these conditions are suggested and discussed.
KW  - Wilcoxon tests
KW  - Pitman efficiency
KW  - Bahadur efficiency
KW  - Length of confidence intervals
KW  - Kernel density estimator
Y1  - 2018
U6  - https://doi.org/10.1007/s00184-018-0661-4
SN  - 1435-926X
VL  - 2018
IS  - 81
SP  - 891
EP  - 930
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Baringhaus, Ludwig
A1  - Gaigall, Daniel
T1  - On Hotelling’s T² test in a special paired sample case
JF  - Communications in Statistics - Theory and Methods
N2  - In a special paired sample case, Hotelling’s T² test based on the differences of the paired random vectors is the likelihood ratio test for testing the hypothesis that the paired random vectors have the same mean; with respect to a special group of affine linear transformations it is the uniformly most powerful invariant test for the general alternative of a difference in mean. We present an elementary straightforward proof of this result. The likelihood ratio test for testing the hypothesis that the covariance structure is of the assumed special form is derived and discussed. Applications to real data are given.
KW  - complete block symmetry
KW  - Hotelling’s T² test
KW  - likelihood ratio test
KW  - uniformly most powerful invariant test
Y1  - 2017
U6  - https://doi.org/10.1080/03610926.2017.1408828
SN  - 1532-415X
VL  - 48
IS  - 2
SP  - 257
EP  - 267
PB  - Taylor & Francis
CY  - London
ER  - 
TY  - JOUR
A1  - Baringhaus, Ludwig
A1  - Gaigall, Daniel
T1  - On an asymptotic relative efficiency concept based on expected volumes of confidence regions
JF  - Statistics - A Journal of Theoretical and Applied Statistic
N2  - The paper deals with an asymptotic relative efficiency concept for confidence regions of multidimensional parameters that is based on the expected volumes of the confidence regions. Under standard conditions the asymptotic relative efficiencies of confidence regions are seen to be certain powers of the ratio of the limits of the expected volumes. These limits are explicitly derived for confidence regions associated with certain plugin estimators, likelihood ratio tests and Wald tests. Under regularity conditions, the asymptotic relative efficiency of each of these procedures with respect to each one of its competitors is equal to 1. The results are applied to multivariate normal distributions and multinomial distributions in a fairly general setting.
KW  - Volume of confidence regions
KW  - asymptotic relative efficiency
KW  - likelihood ratio test
KW  - multivariate normal distribution
KW  - multinomial distribution
Y1  - 2019
U6  - https://doi.org/10.1080/02331888.2019.1683560
SN  - 1029-4910
VL  - 53
IS  - 6
SP  - 1396
EP  - 1436
PB  - Taylor & Francis
CY  - London
ER  - 
TY  - JOUR
A1  - Baringhaus, Ludwig
A1  - Gaigall, Daniel
T1  - On an independence test approach to the goodness-of-fit problem
JF  - Journal of Multivariate Analysis
N2  - Let X₁,…,Xₙ be independent and identically distributed random variables with distribution F. Assuming that there are measurable functions f:R²→R and g:R²→R characterizing a family F of distributions on the Borel sets of R in the way that the random variables f(X₁,X₂),g(X₁,X₂) are independent, if and only if F∈F, we propose to treat the testing problem H:F∈F,K:F∉F by applying a consistent nonparametric independence test to the bivariate sample variables (f(Xᵢ,Xⱼ),g(Xᵢ,Xⱼ)),1⩽i,j⩽n,i≠j. A parametric bootstrap procedure needed to get critical values is shown to work. The consistency of the test is discussed. The power performance of the procedure is compared with that of the classical tests of Kolmogorov–Smirnov and Cramér–von Mises in the special cases where F is the family of gamma distributions or the family of inverse Gaussian distributions.
KW  - Goodness-of-fit test
KW  - Independence test
KW  - Parametric bootstrap
KW  - Vapnik–Čhervonenkis class
KW  - Gamma distribution
Y1  - 2015
U6  - https://doi.org/10.1016/j.jmva.2015.05.013
SN  - 0047-259X
VL  - 2015
IS  - 140
SP  - 193
EP  - 208
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Baringhaus, Ludwig
A1  - Gaigall, Daniel
T1  - Hotelling’s T² tests in paired and independent survey samples: An efficiency comparison
JF  - Journal of Multivariate Analysis
N2  - Hotelling’s T² tests in paired and independent survey samples are compared using the traditional asymptotic efficiency concepts of Hodges–Lehmann, Bahadur and Pitman, as well as through criteria based on the volumes of corresponding confidence regions. Conditions characterizing the superiority of a procedure are given in terms of population canonical correlation type coefficients. Statistical tests for checking these conditions are developed. Test statistics based on the eigenvalues of a symmetrized sample cross-covariance matrix are suggested, as well as test statistics based on sample canonical correlation type coefficients.
Y1  - 2017
U6  - https://doi.org/10.1016/j.jmva.2016.11.004
SN  - 0047-259X
VL  - 2017
IS  - 154
SP  - 177
EP  - 198
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Barbazán, Paula
A1  - Hagenbach, Adelheid
A1  - Paulßen, Elisabeth
A1  - Abram, Ulrich
A1  - Carballo, Rosa
A1  - Rodriguez-Hermida, Sabina
A1  - Vázquez-López, Ezequiel M.
T1  - Tricarbonyl Rhenium(I) and Technetium(I) Complexes with Hydrazones Derived from 4,5-Diazafluoren-9-one and 1,10-Phenanthroline-5,6-dione
JF  - European Journal of Inorganic Chemistry
N2  - Tricarbonylrhenium(I) and -technetium(I) halide (halide = Cl and Br) complexes of ligands derived from 4,5-diazafluoren-9-one (df) and 1,10-phenanthroline-5,6-dione (phen) derivatives of benzoic and 2-hydroxybenzoic acid hydrazides have been prepared. The complexes have been characterized by elemental analysis, MS, IR, 1H NMR and absorption and emission UV/Vis spectroscopic methods. The metal centres (ReI and TcI) are coordinated through the nitrogen imine atoms and establish five-membered chelate rings, whereas the hydrazone groups stand uncoordinated. The 1H NMR spectra suggest the same behaviour in solution on the basis of only marginal variations in the chemical shifts of the hydrazine protons.
Y1  - 2010
U6  - https://doi.org/10.1002/ejic.201000522
SN  - 1099-0682
IS  - 29
SP  - 4622
EP  - 4630
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Bansal, N. K.
A1  - Müller, C.
A1  - Vieira, M. E.
A1  - Faber, Christian
A1  - Schwarzer, Klemens
T1  - Thermal performance of a rock bed storage system
JF  - Proceedings : University of Stuttgart, Germany, August 28th until September 1st, 2000 / Terrastock 2000, 8th International Conference on Thermal Energy Storage. Ed.: M. Benner ... - Vol. 1
Y1  - 2000
SN  - 3-9805274-1-7
N1  - Terrastock <2000, Stuttgart>  ; Institut für Thermodynamik und Wärmetechnik <Stuttgart>
SP  - 433
EP  - 439
PB  - Inst. für Thermodynamik und Wärmetechnik
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Bank, Bart L. van de
A1  - Orzada, Stephan
A1  - Smits, Frits
A1  - Lagemaat, Miriam W.
A1  - Rodgers, Christopher T.
A1  - Bitz, Andreas
A1  - Scheenen, Tom W. J.
T1  - Optimized (31) P MRS in the human brain at 7 T with a dedicated RF coil setup
JF  - NMR in Biomedicine
Y1  - 2015
U6  - https://doi.org/10.1002/nbm.3422
SN  - 1099-1492
VL  - 28
IS  - 11
SP  - 1570
EP  - 1578
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Bandodkar, Amay J.
A1  - Molinnus, Denise
A1  - Mirza, Omar
A1  - Guinovart, Tomas
A1  - Windmiller, Joshua R.
A1  - Valdes-Ramirez, Gabriela
A1  - Andrade, Francisco J.
A1  - Schöning, Michael Josef
A1  - Wang, Joseph
T1  - Epidermal tattoo potentiometric sodium sensors with wireless signal transduction for continuous non-invasive sweat monitoring
JF  - Biosensors and bioelectronics
N2  - This article describes the fabrication, characterization and application of an epidermal temporary-transfer tattoo-based potentiometric sensor, coupled with a miniaturized wearable wireless transceiver, for real-time monitoring of sodium in the human perspiration. Sodium excreted during perspiration is an excellent marker for electrolyte imbalance and provides valuable information regarding an individual's physical and mental wellbeing. The realization of the new skin-worn non-invasive tattoo-like sensing device has been realized by amalgamating several state-of-the-art thick film, laser printing, solid-state potentiometry, fluidics and wireless technologies. The resulting tattoo-based potentiometric sodium sensor displays a rapid near-Nernstian response with negligible carryover effects, and good resiliency against various mechanical deformations experienced by the human epidermis. On-body testing of the tattoo sensor coupled to a wireless transceiver during exercise activity demonstrated its ability to continuously monitor sweat sodium dynamics. The real-time sweat sodium concentration was transmitted wirelessly via a body-worn transceiver from the sodium tattoo sensor to a notebook while the subjects perspired on a stationary cycle. The favorable analytical performance along with the wearable nature of the wireless transceiver makes the new epidermal potentiometric sensing system attractive for continuous monitoring the sodium dynamics in human perspiration during diverse activities relevant to the healthcare, fitness, military, healthcare and skin-care domains.
Y1  - 2014
U6  - https://doi.org/10.1016/j.bios.2013.11.039
SN  - 1873-4235 (E-Journal); 0956-5663 (Print)
VL  - 54
SP  - 603
EP  - 609
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Balzer, Hermann
A1  - Streit, Daniel
A1  - Heinze, Marcel
ED  - Krause, Stefan
T1  - Implikationen der Digitalisierung für den Finanzbereich der Unternehmung und das Rollenbild des CFO
JF  - Betriebswirtschaftliche Implikationen der digitalen Transformation. ZfbF - Schmalenbachs Zeitschrift für betriebswirtschaftliche Forschung, Sonderheft 72
Y1  - 2017
U6  - https://doi.org/10.1007/978-3-658-18751-4_14
N1  - ZfbF - Schmalenbachs Zeitschrift für betriebswirtschaftliche Forschung. Sonderheft 72.
Arbeitskreis Finanzierung der Schmalenbach-Gesellschaft e.V.
IS  - 72
SP  - 267
EP  - 283
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Balzer, Hermann
A1  - Streit, Daniel
T1  - Das Translationsrisiko multinationaler Konzerne in Deutschland: Eine explorative Analyse von Verständnis, Bedeutung und Management-Praxis mit Hilfe der Critical Incident Technique
JF  - Schmalenbachs Zeitschrift für betriebswirtschaftliche Forschung
Y1  - 2017
U6  - https://doi.org/10.1007/s41471-017-0029-x
SN  - 2366-6153
N1  - Arbeitskreis Finanzierung der Schmalenbach-Gesellschaft e.V.
IS  - Online first
SP  - 1
EP  - 40
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Balzer, Hermann
A1  - Brankmann, Heinrich
A1  - Brinker, Bernd
A1  - Dehlke, Dieter
T1  - Kapitalstrukturpolitik und Kapitalgeberinteressen : Ergebnisse einer explorativen Befragung von Vertretern börsennotierter Unternehmen in Deutschland / Arbeitskreis „Finanzierung“ der Schmalenbach-Gesellschaft für Betriebswirtschaft e.V. / Balzer, Hermann
JF  - Schmalenbachs Zeitschrift für betriebswirtschaftliche Forschung : Zfbf. 61 (2009), H. 3
Y1  - 2009
SN  - 0341-2687
N1  - Ausgabe Mai 2009 ; unter Mitarbeit von Hermann Balzer
SP  - 323
EP  - 354
PB  - Springer Gabler
CY  - Wiesbaden
ER  - 
TY  - JOUR
A1  - Balzer, Hermann
A1  - Brakmann, Heinrich
A1  - Dippel, Friedrich
A1  - Dietsch, Johannes M.
T1  - Eine empirische Untersuchung zur Veräußerung von Konzernteilen an Private-Equity-Investoren. Arbeitskreis „Finanzierung“ der Schmalenbach-Gesellschaft für Betriebswirtschaft e.V.  / Balzer, Hermann, Brakmann, Heinrich ; Dippel, Friedrich ; Dietsch, Johann
JF  - Zfbf [Elektronische Ressource] : Schmalenbachs Zeitschrift für betriebswirtschaftliche Forschung = Schmalenbach business review / hrsg. im Auftr. d. Schmalenbach-Gesellschaft für Betriebswirtschaft e.V.. 58 (2006), H. 2
Y1  - 2006
SN  - 0341-2687
IS  - 2
SP  - 235
EP  - 264
ER  - 
TY  - JOUR
A1  - Balzer, Hermann
T1  - Erfahrungen aus dem Einsatz von Cash-Management-Systemen am Beispiel der Mannesmann Mobilfunk GmbH
JF  - Bank- und Finanzmanagement : Marketing - Rechnungswesen - Finanzierung ; Reflexionen aus der Praxis ; Joachim Süchting zum 60. Geburtstag / hrsg. von Dieter Boening und Heinz J. Hockmann. Mit Beitr. von Hermann Balzer ...
Y1  - 1993
SN  - 3-409-13453-0
SP  - 289
EP  - 302
PB  - Gabler
CY  - Wiesbaden
ER  - 
TY  - JOUR
A1  - Balzer, Hermann
T1  - Finanz- und Währungsdispositionen in einer multinationalen Unternehmung
JF  - Semesterbericht / Institut für Kredit- und Finanzwirtschaft ; Verein zur Förderung des Instituts für Kredit- und Finanzwirtschaft e.V. in der Gesellschaft der Freunde der Ruhr-Universität Bochum e.V. ; Seminar für Angewandte Wirtschaftslehre insbesondere (1979)
Y1  - 1979
N1  - Institut für Kredit- und Finanzwirtschaft <Bochum>
SP  - 2
PB  - Inst.
CY  - Bochum-Querenburg
ER  - 
TY  - JOUR
A1  - Balzer, Hermann
T1  - Probleme des Finanzmanagements in Zeiten der Inflation
JF  - Semesterbericht / Institut für Kredit- und Finanzwirtschaft ; Verein zur Förderung des Instituts für Kredit- und Finanzwirtschaft e.V. in der Gesellschaft der Freunde der Ruhr-Universität Bochum e.V. ; Seminar für Angewandte Wirtschaftslehre insbesondere (1977)
Y1  - 1977
N1  - Institut für Kredit- und Finanzwirtschaft <Bochum>
SP  - 8
PB  - Inst.
CY  - Bochum-Querenburg
ER  -