TY  - JOUR
A1  - Olbertz, Klaus
A1  - Fahrig, Stephan
T1  - Offshoring als Betriebs(teil)übergang gemäß § 613a BGB
JF  - ZIP Zeitschrift für Wirtschaftsrecht
Y1  - 2018
SN  - 0723-9416
N1  - gedruckt in der Bereichsbibliothek Eupener Str. unter der Signatur 43 Z 548 vorhanden
IS  - 42
SP  - 2045
PB  - Verlag Dr. Otto Schmidt
CY  - Köln
ER  - 
TY  - JOUR
A1  - Orzada, S.
A1  - Maderwald, S.
A1  - Poser, B. A.
A1  - Johst, S.
A1  - Kannengiesser, S.
A1  - Ladd, M. E.
A1  - Bitz, Andreas
T1  - Time-interleaved acquisition of modes: an analysis of SAR and image contrast implications
JF  - Magnetic Resonance in Medicine
N2  - s the magnetic field strength and therefore the operational frequency in MRI are increased, the radiofrequency wavelength approaches the size of the human head/body, resulting in wave effects which cause signal decreases and dropouts. Especially, whole-body imaging at 7 T and higher is therefore challenging. Recently, an acquisition scheme called time-interleaved acquisition of modes has been proposed to tackle the inhomogeneity problems in high-field MRI. The basic premise is to excite two (or more) different Burn:x-wiley:07403194:media:MRM23081:tex2gif-stack-1 modes using static radiofrequency shimming in an interleaved acquisition, where the complementary radiofrequency patterns of the two modes can be exploited to improve overall signal homogeneity. In this work, the impact of time-interleaved acquisition of mode on image contrast as well as on time-averaged specific absorption rate is addressed in detail. Time-interleaved acquisition of mode is superior in Burn:x-wiley:07403194:media:MRM23081:tex2gif-stack-2 homogeneity compared with conventional radiofrequency shimming while being highly specific absorption rate efficient. Time-interleaved acquisition of modes can enable almost homogeneous high-field imaging throughout the entire field of view in PD, T2, and T2*-weighted imaging and, if a specified homogeneity criterion is met, in T1-weighted imaging as well.
Y1  - 2012
U6  - http://dx.doi.org/10.1002/mrm.23081
SN  - 1522-2594
VL  - 67
IS  - 4
SP  - 1033
EP  - 1041
PB  - Wiley-Liss
CY  - New York
ER  - 
TY  - JOUR
A1  - Paulßen, Elisabeth
A1  - Kong, Shushu
A1  - Arciszewski, Pawel
A1  - Wielbalck, Swantje
A1  - Abram, Ulrich
T1  - Aryl and NHC Compounds of Technetium and Rhenium
JF  - Journal of the American Chemical Society
N2  - Air- and water-stable phenyl complexes with nitridotechnetium(V) cores can be prepared by straightforward procedures. [TcNPh2(PPh3)2] is formed by the reaction of [TcNCl2(PPh3)2] with PhLi. The analogous N-heterocyclic carbene (NHC) compound [TcNPh2(HLPh)2], where HLPh is 1,3,4-triphenyl-1,2,4-triazol-5-ylidene, is available from (NBu4)[TcNCl4] and HLPh or its methoxo-protected form. The latter compound allows the comparison of different Tc–C bonds within one compound. Surprisingly, the Tc chemistry with such NHCs does not resemble that of corresponding Re complexes, where CH activation and orthometalation dominate.
Y1  - 2012
U6  - http://dx.doi.org/10.1021/ja3033718
SN  - 1520-5126
VL  - 134
IS  - 22
SP  - 9118
EP  - 9121
PB  - ACS Publications
CY  - Washington, DC
ER  - 
TY  - JOUR
A1  - Paulßen, Elisabeth
A1  - Ngyugen, Hung Huy
A1  - Kahlcke, Nils
A1  - Deflon, Victor M.
A1  - Abram, Ulrich
T1  - Tricarbonyltechnetium(I) and -rhenium(I) complexes with N′-thiocarbamoylpicolylbenzamidines
JF  - Polyhedron
N2  - N,N-Dialkylamino(thiocarbonyl)-N′-picolylbenzamidines react with (NEt4)2[M(CO)3X3] (M = Re, X = Br; M = Tc, X = Cl) under formation of neutral [M(CO)3L] complexes in high yields. The monoanionic NNS ligands bind in a facial coordination mode and can readily be modified at the (CS)NR1R2 moiety. The complexes [99Tc(CO)3(LPyMor)] and [Re(CO)3(L)] (L = LPyMor, LPyEt) were characterized by X-ray diffraction. Reactions of [99mTc(CO)3(H2O)3]+ with the N′-thiocarbamoylpicolylbenzamidines give the corresponding 99mTc complexes. The ester group in HLPyCOOEt allows linkage between biomolecules and the metal core.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.poly.2012.04.008
SN  - 0277-5387
VL  - 40
IS  - 1
SP  - 153
EP  - 158
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Pham, Phu Tinh
A1  - Nguyen, Thanh Ngoc
A1  - Staat, Manfred
T1  - FEM based shakedown analysis of hardening structures
T2  - Proceedings International Conference on Advances in Computational Mechanics (ACOME)
Y1  - 2012
N1  - International Conference on Advances in Computational Mechanics (ACOME), August 14-16, 2012, Ho Chi Minh City, Vietnam
SP  - 870
EP  - 882
ER  - 
TY  - JOUR
A1  - Pieper, Martin
A1  - Klein, Peter
T1  - Application of simple, periodic homogenization techniques to non-linear heat conduction problems in non-periodic, porous media
JF  - Heat mass transfer
N2  - Often, detailed simulations of heat conduction in complicated, porous media have large runtimes. Then homogenization is a powerful tool to speed up the calculations by preserving accurate solutions at the same time. Unfortunately real structures are generally non-periodic, which requires unpractical, complicated homogenization techniques. We demonstrate in this paper, that the application of simple, periodic techniques to realistic media, that are just close to periodic, gives accurate, approximative solutions. In order to obtain effective parameters for the homogenized heat equation, we have to solve a so called “cell problem”. In contrast to periodic structures it is not trivial to determine a suitable unit cell, which represents a non-periodic media. To overcome this problem, we give a rule of thumb on how to choose a good cell. Finally we demonstrate the efficiency of our method for virtually generated foams as well as real foams and compare these results to periodic structures.
Y1  - 2012
U6  - http://dx.doi.org/10.1007/s00231-011-0879-4
SN  - 0947-7411
VL  - 48
IS  - 2
SP  - 291
EP  - 300
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Poghossian, Arshak
A1  - Abouzar, Maryam H.
A1  - Schöning, Michael Josef
ED  - Abdelghani, Adnane
ED  - Schöning, Michael Josef
T1  - (Bio-­)chemical sensor array based on nanoplate SOI capacitors
T2  - Nanoscale Science and Technology (NS&T´12) : Proceedings Book Humboldt Kolleg ; Tunisia, 17-19 March, 2012
Y1  - 2012
SP  - 31
EP  - 31
ER  - 
TY  - JOUR
A1  - Poghossian, Arshak
A1  - Weil, M. H.
A1  - Bäcker, Matthias
A1  - Mayer, D.
A1  - Schöning, Michael Josef
T1  - Field-effect Devices Functionalised with Gold-Nanoparticle/Macromolecule Hybrids: New Opportunities for a Label-Free Biosensing
JF  - Procedia Engineering
N2  - Field-effect capacitive electrolyte-insulator-semiconductor (EIS) sensors functionalised with citrate-capped gold nanoparticles (AuNP) have been used for the electrostatic detection of macromolecules by their intrinsic molecular charge. The EIS sensor detects the charge changes in the AuNP/macromolecule hybrids induced by the adsorption or binding events. A feasibility of the proposed detection scheme has been exemplary demonstrated by realising EIS sensors for the detection of poly-D-lysine molecules.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.proeng.2012.09.136
SN  - 1877-7058
N1  - Part of special issue "26th European Conference on Solid-State Transducers, EUROSENSOR 2012"
IS  - 47
SP  - 273
EP  - 276
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Quadflieg, Till
A1  - Schoene, Jens
A1  - Schleser, Markus
A1  - Jockenhövel, Stefan
A1  - Reisgen, Uwe
A1  - Gries, Thomas
ED  - Heslehurst, Rikard Benton
T1  - Shear connectors for hybrid joints of metal and FRP
T2  - Diversity in composites : conference proceedings : Composites Australia and CRC-ACS 2012 conference
Y1  - 2012
SN  - 978-0-9873285-0-2
SP  - [152]
EP  - [160]
PB  - Composites Australia
CY  - Hawthorne
ER  - 
TY  - CHAP
A1  - Reisert, Steffen
A1  - Geissler, H.
A1  - Flörke, R.
A1  - Weiler, C.
A1  - Wagner, P.
A1  - Schöning, Michael Josef
ED  - Abdelghani, Adnane
ED  - Schöning, Michael Josef
T1  - Characterisation of aseptic sterilisation processes using an electronic nose
T2  - Nanoscale Science and Technology (NS&T´12) : Proceedings Book Humboldt Kolleg ; Tunisia, 17-19 March, 2012
Y1  - 2012
SP  - 45
EP  - 45
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Olschok, Simon
A1  - Jakobs, Stefan
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Rossiter, Eduardo
T1  - Laser beam submerged arc hybrid welding
JF  - Physics procedia
N2  - The laser beam-submerged arc hybrid welding method originates from the knowledge that, with increasing penetration depth, the laser beam process has a tendency to pore formation in the lower weld regions. The coupling with the energy-efficient submerged-arc process improves degassing and reduces the tendency to pore formation. The high deposition rate of the SA process in combination with the laser beam process offers, providing the appropriate choice of weld preparation, the possibility of welding plates with a thickness larger than 20° mm in a single pass, and also of welding thicker plates with the double-sided single pass technique.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.phpro.2012.10.016
SN  - 1875-3892
N1  - Part of special issue "Laser assisted net shape engineering 7 (LANE 2012)"
VL  - 39
SP  - 75
EP  - 83
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Abdurakhmanov, Aydemir
A1  - Gumenyuk, Andrej
T1  - Application of electron beam welding to fabrication of steel-aluminium dissimilar joint
T2  - Beam technologies & laser application : proceedings of the VII international conference, Saint Petersburg, Sept. 18-21, 2012
Y1  - 2012
SP  - 265
EP  - 279
PB  - Publ. House
CY  - Saint Petersburg
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Abdurakhmanov, Aydemir
A1  - Gumenyuk, Andrey
T1  - Measuring of plasma properties induced by non-vacuum electron beam welding
JF  - Physics of plasma
N2  - Electron beam plasma measurement was realised by means of DIABEAM system invented by ISF RWTH Aachen. The Langmuir probe method is used for measurement. The relative simplicity of the method and the possibility of dispersion of high power on the probe allow its application for the investigation of high-power electron beams. The key element of the method is a rotating thin tungsten wire, which intersects the beam transversely on its axis and collects part of the current by itself. The signals, which are registered in the DIABEAM as a voltage, were taken in the form of amplitude. The conversion of the probe current into the distribution along the beam radius was realised using the Abel’s method. A voltage-current characteristic was built for the beam current. The local electron density as well as the electron temperature, the floating potential and the plasma potential were measured and calculated by means of this characteristic.
Y1  - 2012
U6  - http://dx.doi.org/10.1063/1.3675874
SN  - 1089-7674 (E-Journal); 1070-664X (Print)
VL  - 19
IS  - 1
SP  - 1
EP  - 7
PB  - AIP Publishing
CY  - Melville, NY
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Abdurakhmanov, Aydemir
A1  - Turichin, Gleb
A1  - Valdaitseva, Elena
A1  - Bach, Friedrich-Wilhelm
A1  - Hassel, Thomas
A1  - Beniyashi, Alexander
T1  - Investigation of factors influencing the formation of weld defects in non-vacuum electron beam welding
JF  - The Paton welding journal
N2  - The influence of welding condition parameters and properties of material on formation of defects, such as humping and undercuts, in non-vacuum electron beam welding was investigated. The influence of separate welding parameters on the quality of welds was determined.
Y1  - 2012
SN  - 0957-798X
VL  - 2012
IS  - 2
SP  - 11
EP  - 18
PB  - Paton Publishing House
CY  - Kiev
ER  - 
TY  - CHAP
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Essers, Marc
A1  - Thiele, Regina
A1  - Schiebahn, Alexander
T1  - Klebstofffixiertes Rührreibschweißen von dünnen Aluminiumblechen
T2  - DVS Congress 2012 : Große Schweißtechnische Tagung, DVS-Studentenkongress ; Vorträge der Veranstaltungen in Saarbrücken am 17. und 18. September 2012. (DVS-Berichte ; 286)
Y1  - 2012
SN  - 978-3-87155-593-0
SP  - 20
EP  - 25
PB  - DVS-Media
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Ahmed, Essam
T1  - Statistical modeling of laser welding of DP/TRIP steel sheets
JF  - Optics and laser technology
N2  - In this research work, a statistical analysis of the CO2 laser beam welding of dual phase (DP600)/transformation induced plasticity (TRIP700) steel sheets was done using response surface methodology. The analysis considered the effect of laser power (2–2.2 kW), welding speed (40–50 mm/s) and focus position (−1 to 0 mm) on the heat input, the weld bead geometry, uniaxial tensile strength, formability limited dome height and welding operation cost. The experimental design was based on Box–Behnken design using linear and quadratic polynomial equations for predicting the mathematical models. The results indicate that the proposed models predict the responses adequately within the limits of welding parameters being used and the welding speed is the most significant parameter during the welding process.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.optlastec.2011.05.025
SN  - 1879-2545 (E-Journal); 0030-3992 (Print); 0308-4280 (Print)
VL  - 44
IS  - 1
SP  - 92
EP  - 101
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Ahmed, Essam
T1  - Optimization of laser welding of DP/TRIP steel sheets using statistical approach
JF  - Optics and laser technology
N2  - Generally, the quality of a weld joint is directly influenced by the welding input parameter settings. Selection of proper process parameters is important to obtain the desired weld bead profile and quality. In this research work, numerical and graphical optimization techniques of the CO2 laser beam welding of dual phase (DP600)/transformation induced plasticity (TRIP700) steel sheets were carried out using response surface methodology (RSM) based on Box–Behnken design. The procedure was established to improve the weld quality, increase the productivity and minimize the total operation cost by considering the welding parameters range of laser power (2–2.2 kW), welding speed (40–50 mm/s) and focus position (−1 to 0 mm). It was found that, RSM can be considered as a powerful tool in experimental welding optimization, even when the experimenter does not have a model for the process. Strong, efficient and low cost weld joints could be achieved using the optimum welding conditions.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.optlastec.2011.06.028
SN  - 1879-2545 (E-Journal); 0030-3992 (Print); 0308-4280 (Print)
VL  - 44
IS  - 1
SP  - 255
EP  - 262
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Schmidt, Andre
ED  - Rumpe, Bernhard
ED  - Lichter, Horst
T1  - SimWeld - 10 Jahre Schweißprozesssimulation im ISF
T2  - Entwicklung und Evolution von Forschungssoftware : Tagungsband des Workshops, Rolduc, November 2011. (Aachener Informatik-Berichte, Software-Engineering ; Bd. 14)
Y1  - 2012
SN  - 978-3-8440-1600-0
SP  - 55
EP  - 62
PB  - Shaker
CY  - Aachen
ER  - 
TY  - CHAP
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Ufer, Sebastian
A1  - Guenel, Ismet
A1  - Gach, Stefan
T1  - Voruntersuchungen mit Ansys CFX zu einer Druckstufe von einem Druckstufensystem für das Elektronenstrahlschweißen
T2  - DVS Congress 2012 : Große Schweißtechnische Tagung, DVS-Studentenkongress ; Vorträge der Veranstaltungen in Saarbrücken am 17. und 18. September 2012. (DVS-Berichte ; 286)
Y1  - 2012
SN  - 978-3-87155-593-0
SP  - 33
EP  - 35
PB  - DVS Media
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Reisgen, Uwe
A1  - Schleser, Markus
A1  - Mokrov, Oleg
A1  - Zabirov, Alexander
A1  - Füssel, Uwe
A1  - Schnick, Michael
A1  - Hertel, Martin
A1  - Jaeckel, Sebastian
T1  - Modellierung und Visualisierung der MSG-Lichtbogenprozesse
JF  - Schweissen und Schneiden : Fachzeitschrift für Schweißen und verwandte Verfahren
Y1  - 2012
SN  - 0036-7184
VL  - 64
IS  - 4
SP  - 166
EP  - 174
PB  - DVS Verlag
CY  - Düsseldorf
ER  -