TY  - JOUR
A1  - Miyamoto, Ko-ichiro
A1  - Hirayama, Yuji
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
A1  - Yoshinobu, Tatsuo
T1  - Visualization of enzymatic reaction in a microfluidic channel using chemical imaging sensor
JF  - Electrochimica acta
Y1  - 2013
SN  - 1873-3859 (E-Journal); 0013-4686 (Print)
SP  - Publ. online
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Hötter, Jan-Steffen
A1  - Fateri, Miranda
A1  - Gebhardt, Andreas
T1  - Selective laser melting of metals: desktop machines open up new chances even for small companies
JF  - Advanced materials research
N2  - Additive manufacturing (AM) of metal parts by using Selective Laser Melting (SLM) has become a powerful tool mostly in the area of automotive, aerospace engineering and others. Especially in the field of dentistry, jewelry and related branches that require individualized or even one-of-a-kind products, the direct digital manufacturing process opens up new ways of design and manufacturing. In these fields, mostly small and medium sized businesses (SME) are operating which do not have sufficient human and economic resources to invest in this technology. But to stay competitive, the application of AM can be regarded as a necessity. In this situation a new desktop machine (Realizer SLM 50) was introduced that cost about 1/3 of a shop floor SLM machine and promises small quality parts. To find out whether the machine really is an alternative for SMEs the University of Applied Science, Aachen, Germany, designed, build and optimized typical parts from the dentistry and the jewelry branches using CoCr and silver material, the latter being new with this application. The paper describes the SLM procedure and how to find and optimize the most important parameters. The test is accompanied by digital simulation in order to verify the build parameters and to plan future builds. The procedure is shown as well as the resulting parts made from CoCr and silver material.
Y1  - 2012
U6  - https://doi.org/10.4028/www.scientific.net/AMR.622-623.461
SN  - 1662-8985 (E-Journal); 1022-6680 (Print)
VL  - 622-623
SP  - 461
EP  - 465
PB  - Trans Tech Publ.
CY  - Baech
ER  - 
TY  - JOUR
A1  - Sabitova, A.
A1  - Ebert, Ph.
A1  - Lenz, A.
A1  - Schaafhausen, S.
A1  - Ivanova, L.
A1  - Dähne, M.
A1  - Hoffmann, A.
A1  - Dunin-Borkowski, R. E.
A1  - Förster, Arnold
A1  - Grandidier, B.
A1  - Eisele, H.
T1  - Intrinsic bandgap of cleaved ZnO(112¯0) surfaces
JF  - Applied physics letters
Y1  - 2013
SN  - 1077-3118 (E-Journal); 0003-6951 (Print)
VL  - Vol. 102
SP  - 021608
ER  - 
TY  - JOUR
A1  - Jiminez German, Salvador
A1  - Behbahani, Mehdi
A1  - Miettinen, Susanna
A1  - Grijpma, Dirk W.
A1  - Haimi, Suvi P.
T1  - Proliferation and differentiation of adipose stem cells towards smooth muscle cells on poly(trimethylene carbonate) membranes
JF  - Macromolecular symposia
Y1  - 2013
SN  - 0258-0322
VL  - Vol. 334
IS  - Iss. 1
SP  - 133
EP  - 142
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Neighborhood conditions for graphs and digraphs to be maximally edge-connected
JF  - Australasian journal of combinatorics
Y1  - 2005
SN  - 10344942 ; 22023518
VL  - Vol. 33
SP  - 265
EP  - 277
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Sufficient conditions for graphs to be λ′-optimal, super-edge-connected, and maximally edge-connected
JF  - Journal of graph theory
Y1  - 2005
SN  - 03649024
VL  - Vol. 48
IS  - Iss. 3
SP  - 228
EP  - 246
ER  - 
TY  - JOUR
A1  - Xu, Jung-Ming
A1  - Lü, Min
A1  - Ma, Meijie
A1  - Hellwig, Angelika
T1  - Super connectivity of line graphs
JF  - Information processing letters
Y1  - 2005
SN  - 1872-6119 (E-Journal); 0020-0190 (Print)
VL  - Vol. 94
IS  - Iss. 4
SP  - 191
EP  - 195
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Rautenbach, Dieter
A1  - Volkmann, Lutz
T1  - Note on the connectivity of line graphs
JF  - Information processing letters
Y1  - 2004
SN  - 1872-6119 (E-Journal); 0020-0190 (Print)
VL  - Vol. 91
IS  - Iss. 1
SP  - 7
EP  - 10
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Maximally local-edge-connected graphs and digraphs
JF  - Ars combinatoria
Y1  - 2004
SN  - 0381-7032
VL  - Vol. 72
SP  - 295
EP  - 306
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Neighborhood and degree conditions for super-edge-connected bipartite digraphs
JF  - Results in mathematics
Y1  - 2004
SN  - 1420-9012 (E-Journal); 1422-6383 (Print)
VL  - Vol. 45
IS  - Iss. 1-2
SP  - 45
EP  - 58
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Sufficient conditions for λ′-optimality in graphs of diameter 2
JF  - Discrete mathematics
Y1  - 2004
SN  - 1872-681X (E-Journal); 0012-365X (Print)
VL  - Vol. 283
IS  - Iss. 1-3
SP  - 113
EP  - 120
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Maximally edge-connected digraphs
JF  - Australasian journal of combinatorics
Y1  - 2003
SN  - 1034-4942 (E-Journal); 1034-4942 (Print)
VL  - Vol. 27
SP  - 23
EP  - 32
ER  - 
TY  - JOUR
A1  - Heinze, Daniel
A1  - Mang, Thomas
A1  - Peter, Karin
A1  - Möller, Martin
A1  - Weichold, Oliver
T1  - Synthesis of low molecular weight poly(vinyl acetate) and its application as plasticizer
JF  - Journal of applied polymer science
N2  - Poly(vinyl acetate), PVAc, with a degree of polymerization Xn = 10 was prepared by chain-transfer radical polymerization using carbon tetrachloride and used as oligomeric plasticizer for commercial PVAc. However, the chlorinated chain ends cause a low thermal stability requiring mild Cl/H substitution. The product exhibits high thermal stability and excellent melt-compounding properties. Blends of oligomeric and commercial PVAc show single glass transition temperatures which decrease with higher oligomer content and exhibit small negative deviations from Fox' linear additivity rule. This indicates plasticization and miscibility being mainly due to entropic effects. Injection-moulded thick specimens show ductile behaviour at oligomer contents >10 wt %, while sheets with a thickness of 0.2–0.5 mm appear flexible already at 7.5 wt %. The oxygen permeability coefficients are an order of magnitude lower than those of low-density polyethylene. Due to the sum of their properties, the plasticized sheets present a promising alternative in the preparation of barrier materials.
Y1  - 2014
U6  - https://doi.org/10.1002/app.40226
SN  - 1097-4628 (E-Journal); 0021-8995 (Print)
VL  - 131
IS  - 9
SP  - Article No. 40226
PB  - Wiley
CY  - New York
ER  - 
TY  - JOUR
A1  - Dankelmann, Peter
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Inverse degree and edge-connectivity
JF  - Discrete mathematics
Y1  - 2009
SN  - 1872-681X (E-Journal); 0012-365X (Print)
VL  - Vol. 309
IS  - Iss. 9
SP  - 2943
EP  - 2947
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Maximally edge-connected and vertex-connected graphs and digraphs : a survey
JF  - Discrete mathematics
Y1  - 2008
SN  - 1872-681X (E-Journal); 0012-365X (Print)
VL  - Vol. 308
IS  - Iss. 15
SP  - 3265
EP  - 3296
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - The connectivity of a graph and its complement
JF  - Discrete applied mathematics
Y1  - 2008
SN  - 0166-218X (E-Journal); 1872-6771 (E-Journal); 0166-218X (Print)
VL  - Vol. 156
IS  - Iss. 17
SP  - 3325
EP  - 3328
ER  - 
TY  - JOUR
A1  - Dankelmann, Peter
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - On the connectivity of diamond-free graphs
JF  - Discrete applied mathematics
Y1  - 2007
SN  - 0166-218X (E-Journal); 1872-6771 (E-Journal); 0166-218X (Print)
VL  - Vol. 155
IS  - Iss. 16
SP  - 2111
EP  - 2117
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Lower bounds on the vertex-connectivity of digraphs and graphs
JF  - Information processing letters
Y1  - 2006
SN  - 1872-6119 (E-Journal); 0020-0190 (Print)
VL  - Vol. 99
IS  - Iss. 2
SP  - 41
EP  - 46
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - On connectivity in graphs with given clique number
JF  - Journal of graph theory
Y1  - 2006
SN  - 03649024 ; 10970118
VL  - Vol. 52
IS  - Iss. 1
SP  - 7
EP  - 14
ER  - 
TY  - JOUR
A1  - Hellwig, Angelika
A1  - Volkmann, Lutz
T1  - Some upper bounds for the domination number
JF  - The journal of combinatorial mathematics and combinatorial computing : JCMCC
Y1  - 2006
SN  - 0835-3026
VL  - Vol. 57
SP  - 187
EP  - 209
ER  -