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  - 
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  - CHAP
A1  - Kern, Alexander
A1  - Imani Vashiani, Anahita
A1  - Timmermanns, Tobias
T1  - Threat for human beings due to touch voltages and body currents caused by direct lightning strikes in case of non-isolated lightning protection systems using natural components
T2  - 35th International Conference on Lightning Protection (ICLP) and XVI International Symposium on Lightning Protection (SIPDA)
N2  - For typical cases of non-isolated lightning
protection systems (LPS) the impulse currents are investigated which may flow through a human body directly touching a structural part of the LPS. Based on a basic LPS model with conventional down-conductors especially the cases of external and internal steel columns and metal façades are considered and compared. Numerical simulations of the line quantities voltages and currents in the time domain are performed with an equivalent circuit of the entire LPS.
As a result it can be stated that by increasing the number of conventional down-conductors and external steel columns the threat for a human being can indeed be reduced, but not down to an acceptable limit. In case of internal steel columns used as natural down-conductors the threat can be reduced sufficiently, depending on the low-resistive connection of the steel columns to the lightning equipotential bonding or the earth termination system, resp. If a metal façade is used the threat for human beings touching is usually very low, if the façade is sufficiently interconnected and multiply connected to the lightning equipotential bonding or the earth termination system, resp.
KW  - Lightning protection system
KW  - down-conductor
KW  - steel columns
KW  - metal façade
KW  - touch voltage
Y1  - 2021
SN  - 978-1-6654-2346-5
U6  - http://dx.doi.org/10.1109/ICLPandSIPDA54065.2021.9627465
N1  - 35th International Conference on Lightning Protection (ICLP) and XVI International Symposium on Lightning Protection (SIPDA), 20-26 Sept. 2021, Colombo, Sri Lanka
PB  - IEEE
ER  - 
TY  - JOUR
A1  - Kirschner-Hermanns, Ruth
A1  - Klementz, T.
A1  - Haselhuhn, Angelika
A1  - Jakse, Gerhard
A1  - Heidenreich, A.
A1  - Brehmer, Bernhard
T1  - Drangsymptomatik nach onkologisch erfolgreicher Prostatakarzinomtherapie : prospektive Studie zum Einfluss von Therapiemodalität, Morbidität und epidemiologischen Faktoren auf die Lebensqualität
JF  - Der Urologe
Y1  - 2011
SN  - 1433-0563
VL  - Vol. 50
IS  - Iss. 11
SP  - 1412
EP  - 1419
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Schlieper, G.
A1  - Brandenburg, V.
A1  - Djuric, Z.
A1  - Damjanovic, T.
A1  - Markovic, N.
A1  - Schurgers, L.
A1  - Krüger, T.
A1  - Westenfeld, R.
A1  - Ackermann, D.
A1  - Haselhuhn, Angelika
A1  - Dimkovic, S.
A1  - Ketteler, M.
A1  - Floege, J.
A1  - Dimkovic, N.
T1  - Risk factors for cardiovascular calcifications in non-diabetic Caucasian haemodialysis patients
JF  - Kidney & blood pressure research
Y1  - 2009
SN  - 1423-0143 (E-Journal); 0378-5858 (Print); 1011-6524 (Print); 1420-4096 (Print)
VL  - Vol. 32
SP  - 161
EP  - 168
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  -